EPA-600/2-77-084
TVA-F77 PRS-24
April 1977
Environmental Protection Technology Series
      RECENT USSR LITERATURE ON CONTROL
                  OF PARTICULATE EMISSIONS
                  FROM  STATIONARY SOURCES
                                  U.S. Environmental Protection Agency
                                  Office of Research and Development
                                      Washington, D.C. 20460

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                       RESEARCH REPORTING SERIES
Research reports of the Office of Research and Development, U.S. Environmental Protection
Agency, have been grouped into five series. These five broad categories were established to.
facilitate further development and application of environmental technology. Elimination of
traditional grouping was consciously planned to foster technology transfer and a maximum
interface in related fields. The five series are:

    1.  Environmental Health Effects Research
    2.  Environmental Protection Technology
    3.  Ecological Research
    4.  Environmental Monitoring
    5.  Socioeconomic Environmental Studies

This report has been assigned to the ENVIRONMENTAL PROTECTION TECHNOLOGY
series. This series describes research performed to develop and demonstrate instrumenta-
tion, equipment, and methodology to repair or prevent environmental degradation from point
and non-point sources of pollution. This work  provides the new or improved technology
required for the control and treatment of pollution sources to meet environmental quality
standards.
                            EPA REVIEW NOTICE

This report has been reviewed by the U.S. Environmental Protection Agency, and approved
for publication. Approval does not signify that the contents necessarily reflect the views and
policy of the Agency, nor does mention of trade names or commercial products constitute
endorsement or recommendation for use.

This document is available to the public through the National Technical Information Service,
Springfield, Virginia 22161.

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                                                    EPA-600/2-77-084
                                                      TVA-F77 PRS-24
            RECENT  USSR  LITERATURE
ON CONTROL OF PARTICULATE EMISSIONS
          FROM  STATIONARY SOURCES
                               by

                           Charles E. Feazel

                       Southern Research Institute
                        2000 Ninth Avenue South
                       Birmingham, Alabama 35205
 TVA Research Agreement TV 42937A
     EPA Grant No. R802938-01
       ROAP No. 21ADL-034
     Program Element No. 1AB012
TVA Project Officer: HI. Falkenberry

     Power Research Staff
   Tennessee Valley Authority
   Chattanooga, Tennessee 37401
   EPA Project Officer: N.A. Jaworski

Industrial Environmental Research Laboratory
  Office of Energy, Minerals, and Industry
Research Triangle Park, North Carolina 27711
    POWER RESEARCH STAFF
    Tennessee Valley Authority
  Chattanooga, Tennessee 37401
                          Prepared jointly for
U.S. ENVIRONMENTAL PROTECTION AGENCY
   Office of Research and Development
       Washington, D.C. 20460
                            April 1977

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                             ABSTRACT
     About 600 articles published from about 1970 through 1975
in several technical and scientific journals in the U.S.S.R.
were compiled and classified according to subject content.
These articles were selected as indicators of U.S.S.R. tech-
nology in controlling air pollution by particulate emissions
from stationary sources, with special emphasis on fly ash from
the combustion of coal in electric power plants.  The control
devices include electrostatic precipitators, wet scrubbers,
fabric filters, cyclones, and granular bed filters.
                               11

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                            CONTENTS


Abstract	ii
Acknowledgements  	   iv

     1.   Introduction	    1
     2.   Electrical  Precipitators	    3
             Use  in  Electric Power Plants	    3
             Corona  and Electrical Breakdown  	  .6
             Electric  Field	    8
             Particle  Charging  	    9
             Particle  Collection  	   10
             Electrical Resistivity of Particulate
               Matter	11
             Composition  and Properties of Fly Ash and
               Other Dusts	11
             Electrical Energization  	   13
             Rapping and  Fly Ash Reentrainment	13
             Gas  Flow	14
             Wet  Electrostatic  Precipitators  	   15
             Industrial Applications  	   16
     3.   Wet Scrubbers	18
             Use  in  Electric Power Plants	18
             Mechanisms of Action  	   20
             Types of  Scrubbers	21
             Industrial Applications  	   23
     4.   Fabric Filters	25
             Collection Mechanisms .... 	   25
             Baghouses	   27
             Filter  Fabrics	27
             Mist Eliminators	28
             Industrial Applications  	   29
     5.   Other Collectors  	   30
             Cyclones	30
             Granular  Bed Filters	30
             Acoustical Processes  in  Particle Collection  .  .   30
     6.   Sampling and  Measurement Methods	32

References	34
                              111

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                         ACKNOWLEDGEMENTS


     Alan Dean, Associate Chemist at Southern Research Institute,
V. Minic, Manager of the Southern Research Institute Library,
and Ms.  Elizabeth Koniuskow, Environmental Protection Agency,
participated in the literature search and preparation of the
report.  Mr. J.  Pekar and Dr. D.C. Drehmel, Environmental
Protection Agency, provided items from literature searches made
at the Environmental Protection Agency.
                               IV

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                             SECTION  1

                           INTRODUCTION
     The scope of  this  literature  survey  is  the  technical  and
scientific  information  recently published  in the U.S.S.R.  that
is significant in  showing  the  status of the  technology  of  con-
trolling particulate emissions from stationary sources,  with
special emphasis on fly ash  from the combustion  of  coal  in
electric power plants.  The  survey is  intended to include  the
essential information,  but not to  provide  complete  bibliographic
coverage of  the subject.

     The scope was operationally defined  in  terms of manual
searching of  indexes for pertinent items,  in Chemical Abstracts
(1973-1975),  Air Pollution Abstracts  (1973-1975), Engineering
Index  (1973-1975), Physics Abstracts  (1973-1975), Electrical
and Electronics Abstracts  (1973-1975), and Referativnyi  Zhurnal
Khimiya  (1975-1976, Nos. 1-6).  Some pertinent items that  had
been obtained from these sources in 1970  through 1972 were also
included.

     The following publications were covered by  searching  their
title pages  for 1973-1975  in Current Contents -  Physical and
Chemical Sciences  and Current Contents -  Engineering, Technology
and Applied Sciences: Khimicheskaya Promyshlennost'  (Soviet
Chemical Industry), Stal1  (Steel in the USSR), Zhurnal  Prikladnoi
Khimii  (Journal of Applied Chemistry of the  USSR),  and  Zhurnal
Tekhnicheskoi Fiziki (Soviet Physics-Technical Physics).

     Each issue of the  following journals  for 1973-1975  was
examined:  Elektricheskiye Stantsii  [electric power plants],
Elektrichestvo (Electric Technology USSR), Energetik  [power],
and Teploenergetika (Thermal Engineering).   The  names in paren-
theses are those of translations that are  available.

     Some items from APTIC searches that  had been made  on  the
subjects of particulate control and measurements were included
in the survey.

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     The search also included a number of unpublished reports
that were provided by the U.S.S-R. members to the U.S. members
of the Stationary Source Air Pollution Control Technology Com-
mittee and the Committee on Design and Operation of Air Pollu-
tion Reduction and Waste Disposal Systems for Thermal Power
Plants.

     Other articles, titles, and abstracts were provided by
the staff of the Environmental Protection Agency Industrial
Environmental Research Laboratory.

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                             SECTION 2

                    ELECTROSTATIC PRECIPITATORS
USE  IN  ELECTRIC  POWER PLANTS

      Electrostatic precipitators  are used in the U.S.S.R.  on
electric  power units  of  300 MW and larger,  and on plants burning
coal  with 15% or more ash.  Precipitator  designs and the theo-
retical basis for them have been  presented  (1,2).

      To supply the electrical  energy needs  of the U.S.S.R.  requires
the  use of Baltic shale  and coal  from the large Ekibastuz  and
Kansk-Achinsk deposits (3).  The  shale has  a high ash content
 (50%) with a high lime content (4).   Ekibastuz coal  has  a  high
ash  content (40%) , a  low sulfur content (<1%), and a high  silica
content in the ash (typically  65%),  and the fly ash  has  a  high
electrical resistivity (lO^-lO1*1  ohm-cm)  (4,5).  The Kansk-
Achinsk fuel is  a low-ash low-sulfur lignite.   Its ash has  a
high  lime content (6).

      When fuels  such  as  Ekibastuz  coal began to be used, electro-
static  precipitators  collecting fly  ash gave lower collection
efficiencies than the design efficiency of  about 99%. It  was
known that a fly ash  with a high  electrical resistivity  is  dif-
ficult  to collect, and so attempts to improve the collection
efficiency began with changes  in  the design of the precipitator
to avoid  back corona  and sparking  through the layer  of fly  ash
deposited on the collection electrode (7).   Since electrical
breakdown of the fly  ash layer is  a  function of its  electrical
resistivity and  the current density, a more uniform  current
density would permit  operation at  a  higher  resistivity before
the onset of back corona.

      This approach led to modification of the shape  of the  corona
electrode to achieve  a more uniform  electric field and current
density.   The U.S.S.R. precipitator  design,  like the German
Lurgi design, has a frame-supported  corona  electrode assembly.
The corona electrode  is  a strip of metal  approximately 1.4  mm
thick and 25 mm  wide.  Equipping  the electrode with  needle-like
protrusions was  found to improve  the performance of  the  preci-
pitator (8,9).

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     Studies of the distribution of corona current and of the
volt-ampere characteristic of the needle-shaped electrodes led
to the conclusion that they allow the collection of high-resis-
tivity dusts with decreased likelihood of back corona and with
increased collection efficiency  (10).

     Further, when the orientation of the needles on a corona
electrode was changed from the normal perpendicular configura-
tion to one parallel to the collection electrodes, a larger
difference in potential between the corona and the collection
electrode was found.  The discharge from each needle is  directed
to both collection electrodes, the field near the collection
electrode is equalized, and the effectiveness of cleaning  the
gas is increased, especially in collecting high-resistivity
ash.  This method of intensifying the discharge and collecting
fly ash has found wide application both in operating and newly
constructed electric power plants (11,12).

     Modification of the corona system in electrostatic  precipi-
tators on 300 MW units in a power plant by installing leaf-needle
electrodes with a distance between the needles of 40 mm  and
rotation of the elements to orient the needles in the direction
of gas flow, together with improvements in the rapping regime
and the electrification equipment, resulted  in an increase of
the collection efficiency from 87.5 to 96.8%  (13,14).

     To determine the optimal construction parameters in an
experimental-industrial horizontal electrostatic precipitator
at a power plant treating 20,000 m3/hr, its  electrical charac-
teristic was investigated as it related to the length of the
needles while retaining a constant discharge distance.   It was
found that, by changing the length of the needles, the corona
current could be regulated over a wi<3e range.  A study was also
made on a model plate precipitator with an industrial needle
electrode system.  Orientation of the needles in the direction
of the gas flow substantially decreased the  specific corona
current density  (12).

     An investigation of electrical wind which was made  on bench
units showed that an intensive flow arises with a corona dis-
charge from needles; the electrical wind near the needles  can
attain a velocity of several meters per second.  The local flow
of the electrical wind is largely swept away by the main aas
flow, but owing to the large number of corona points, the  elec-
trical wind helps move the fine dust from the central part of
the gas passageway toward the collection electrode  (11)

     However, modification of the electrodes may not
prevent the appearance of back corona when high-resistivitv
ash is collected.  Therefore, at electric power plants wi-H h
collect the ash of low-sulfur coals, methods for humidifying

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 (conditioning)  flue gases prior  to their entry into the electro-
 static  precipitators have been developed which permit a reduction
 in  the  specific electrical resistance of the ash and an improve-
 ment  in the  discharge characteristics of the gas gap.  In such
 instances,  the  effective migration velocity of the particles
 could be increased 1.5- to 2-fold without any change in the
 design  of the electrostatic precipitator, except that the rap-
 ping  of the  collection electrodes was changed to more effective
 rapping mechanisms (11).

      A  wet  scrubber can be installed ahead of the precipitator
 to  add  the moisture.  The scrubber also reduces the temperature
 with  a  generally beneficial effect on collection.  The types
 of  scrubbers that have been used are spray chambers or venturi
 designs modified by the incorporation of spray nozzles (3).

      Basic parameters of a combined ash trapping scheme tested
 at  a  300 MW  unit of a power plant firing high-ash coal are
 presented (15).   The facility is composed of a wet venturi for
 removing 90% of  the ash and for  cooling the flue gas to 75-80°C.
 The wet flue gas carrying ash with a reduced electrical resis-
 tivity  is then  admitted into an  electrostatic precipitator which
 has an  efficiency of 99-99.5%.

      Modifications of electrostatic precipitators collecting
 fly ash from the combustion of Baltic shale are described.
 The modifications consist of the installation of needle-shaped
 corona  electrodes and changes in the electric power supply
 (4,8,16).

      The use of  electrostatic precipitators in the collection
 of  fly  ash with  a high lime content (28% CaO)  from Irsha-Borodino
 coal  is described (17).   The chemical composition of the  fly
 ash from this coal is given (18).

      In the  collection of fly ash with a high lime content,
 hydration of calcium oxide in the ash layer on the collection
 electrodes hardens the deposited layer,  which worsens the elec-
 trical  indexes of the precipitators with time, especially when
 wire  corona  electrodes are used.   Under  these conditions, needle
 electrodes operate considerably  more reliably (11).

      Data are presented  on horizontal plate-type electrostatic
 precipitators used in thermal electric power stations and in
 cement  plants (19,20).

      Reconstruction of an electrostatic  precipitator to replace
 the corrugated collection electrodes by  C-shaped electrodes,
use of  impact hammer  rappers,  and use of needle-shaped electrodes
 improved  the performance of the  precipitator in collecting fly
ash (13).

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     Similar measures were successfully applied to electrostatic
precipitators used for removing fly ash from oil shale combus-
tion  (21) .

     The  collection efficiency of horizontal electrostatic  pre-
cipitators collecting high resistivity fly ash from low-sulfur
coal was  increased by changing the rapping procedure and  decreas-
ing the  flue gas temperature from 140° to 122°C  (22,23).

     Problems encountered in installing an electrostatic  precipi-
tator  in  a 300 MW power block are described  (24).

     The  costs of electrostatic precipitators relative  to their
sizes  have been considered  (25,26).  The use of  a  laboratory
version  of an electrostatic precipitator for developing best
conditions for the collection of fly ash from Ekibastuz coal
is  described  (27).  Improved methods of calculating efficiency
of  removal of fly ash in power boilers are given  (28).

     A series of papers published in 1974 provides details  of
the history of research and development of control methods  for
particulate emissions at NIIOGAZ  (29-35).

     A source book published in 1969 presents background  infor-
mation on the technology of the cleaning of  stack  gases  in  the
electric  power industry in the U.S.S.R.  The information  includes
discussions of various problems related to the design and opera-
tion of  gas cleaning systems (36), and the determination  of
the basic properties of dusts and gases (37,38).

     A more recent compilation that presents a selection  of
new published and unpublished information on various  air  pollu-
tion control devices and their applications  has  been  provided
(39) .

CORONA AND ELECTRICAL BREAKDOWN

     Several basic studies have been reported in  recent  years
on corona discharges and associated electrical phenomena  in
gases.  Some of these investigations are related  to the  processes
that take place in electrostatic precipitators;  others  are less
relevant  since they pertain to conditions such as  low gas pres-
sure or to electrical breakdown in high-voltage  conductors.

     A comprehensive review and summary of the fundamentals
of the electrodynamics of suspended particles was  published
in 1974.   It includes a discussion of techniques  that have been
developed for characterizing electric fields and  for  studying
the behavior of charged particles in them, specifically the
collection of particles from gas streams  (40) .

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      The  effect  of variations in the mobilities of ions in uni-
polar  corona  was studied (41).   Changes in ion mobility had
a  slight  effect  on the overall  shape of the volt-ampere charac-
teristic,  but produced a marked change in the distribution of
the  field  potential in the  corona discharge gap-   A dynamic
method for determining ion  mobility was developed (42).

      The  effects of dust concentration and the resulting particle
space  charge  on  the corona  field have been calculated (43,44).
Measuring  the electric field of a corona discharge in a dust-
laden  stream  is  also discussed  (45).

      The  effects of free radicals from the gas on the performance
of electrostatic precipitators  was shown experimentally.  The
presence  of free radicals can explain the formation of space
charges between  positive and negative electrodes.  The addition
of substances tending to form free radicals could aid in gas
cleaning  (46) .   A comparison of the effects of surface finishes
and  treatments of the cathode indicates that positive ions in
the  gas and on the cathode  surface control the production of
effective  electrons (47).

      Electric breakdown of  air  gaps has been studied under condi-
tions  typical of electrostatic  precipitation for  wire-plane
and  coaxial cylinder geometries with various shapes of electrodes
 (48-52).   The initiation voltage is calculated (53).  The effect
of transitional  processes in sparkover on precipitator efficiency
was  studied (54).

     Other studies on corona include:  the electrical discharge
in a multi-electrode system (55);  the corona initiation voltage
in structures with semi-conducting coatings (56); the erosion
of electrodes in point-to-plane discharge (57,58);  the determina-
tion of corona initiation voltage for electrodes  of complex
shape  (59,60); the efficiencies of electrostatic  precipitators
with various  types and shapes of corona electrodes (61-64).

     The  electrical characteristic of the electrode system and
the  trajectories of dust particles were measured  under conditions
of back corona in an electrostatic precipitator (65).

     An experimental study  of particle trajectories showed that
corona from a needle-shaped electrode improves the electrical
characteristic of a precipitator and allows a higher migration
velocity of the  particles (66).

     A laboratory study of  a plate electrostatic  precipitator
with a cylindrical discharge electrode (needle-leaf shape)  estab-
lished the  applicability of the precipitator for  the calculation
of the attenuation of current found in the presence of the dis-
persed phase  in  the interelectrode space (67).

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      The equation of the field in corona discharge in an elec-
 trode system consisting of a row of conductors between planes
 was solved by the use of a series expansion to calculate the
 field potential.   This method gives better agreement with experi-
 mental data than  the Deutsch-Popkov method.  The values calcu-
 lated for space-charge density by the two methods differ by
 10% at the plane, 80% at the midpoint of the distance between
 conductor and plane, and 40% at the midpoint of the inter-con-
 ductor distance  (68).

      Mathematical models and calculations of the initiation
 of electrical discharge and breakdown have been developed  (69-
 71) .

      The distribution of current of unipolar corona at the corona
 and non-corona electrodes was measured.  The results indicated
 that the distribution of current depended on the intensity of
 the corona and the electrode geometry, in accordance with theory.
 The current distribution on the surface of the corona electrode
 was not uniform  (72).

      The results  of an extensive study on the characteristics
 of corona discharge in air and in blast-furnace gas indicate
 that operation of an electrostatic precipitator should be more
 effective at 4 atm pressure of blast furnace gas than at atmos-
 pheric pressure  (73,74).

      The mobility of hydrogen ions in the field of unipolar
 corona in a cylindrical electrode geometry at pressures up to
 25 atm was determined experimentally  (75).

 ELECTRIC FIELD

      A number of  investigations and calculations of electric
 fields have been  carried out.  Examples are:  a method of linear
 programming for calculation of fields (76) , calculation of the
 field between point and plane (77) , calculation of the field
 in a  spatial  system of spherical elements (78) , with ring elec-
 trodes  (79),  a system of parallel toroids (80), in a hetero-
 geneous medium of irregular structure (81), and for conducting
 particles  (82); with the use of an integral equation of the
 first order  (83,84),  of the second order (85), in a periodic
 system of  interacting  spheroids (86), and for a screen with
 a  complex  shape (87);  and calculation of plane-meridian and
 plane-parallel fields  (88-90) .

     A method of  analysis of 2-dimensional fields formed by
electric or magnetic polarization of  solids is presented (91).

     An ionization mechanism of the instability of currents
in molecular gases  is  proposed  (92,93) .

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PARTICLE CHARGING

     The field-charging  and  diffusion-charging  mechanisms of
particle charging  in  a corona  discharge  are  discussed from a
theoretical point  of  view  (94,95).   A distribution curve for
particle charges was  constructed  in  a study  of  the charging
of particles with  radii  of the order of  the  mean  free path of
ions in air  (96).

     The distribution of dust  concentration  in  the fields of
an electrostatic precipitator  was determined (97).   The  limit
concentrations  of  the dispersed phase in the electric field
of corona discharge resulting  from the decrease in free  ion
concentration with increasing  space-charge density were  calcu-
lated  (98).  The electric  field and  an image charge of charged
particles near  a non-uniform surface were calculated (99).

     Calculations  were made  of the orientation  time and  velocity
of ellipsoidal  particles in  electric fields  of  1-3  and 5-10
kV/cm  (100).  A study was made of the statistical  distribution
of the parameters  involved in  the orientation of  elongated par-
ticles  (fibers)  in an electrostatic  field (101).

     Equations  were derived  for describing the  motion of ions
and particles in the  field of  corona discharge  (102).  The kine-
tics of coagulation of charged particles were modelled mathemati-
cally  (103).  Charge  transfer  in  the collision  of  charged drops
was studied experimentally  (104).

     The charges acquired by aspherical  particles  in a corona
field can usually  be  calculated with sufficient accuracy by
assuming the shape to be an  ellipsoid of the same  axis ratio
and volume.  However, up to  30% error can result  if the  shape
of the particle is sufficiently different, and  the  amount of
charge acquired can be limited by the onset  of  corona from the
particle if it  is  conducting and  has a conical  shape (105).

     The coefficients of coalescence and dispersion of charged
particles are functions  only of the  coefficient of  electric
asymmetry  (106).

     Experimental  studies on electrostatic liquid  atomizers
included the effect of electric field on dispersion (107,108),
the energy content of the droplets (109), and their charges
(110).

     The effect of the plate spacing on  the  electrostatic collec-
tion of high-resistivity dust  was  determined (111).

     The relationships of dielectric permeability,  time,  form,
and concentration  of  the dispersed phase to  the frequency of
a sinusoidal electric field  were  studied (112) .

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      The steady state  concentrations of electrons during photo-
 ionization of  aerosol  particles  were calculated (113).

      A theory  of the  induction method of measuring the  volume
 charge density of aerosol  particles is proposed,  and the param-
 eters of the measuring apparatus are discussed (114).

      An electrostatic  analyzer for  charged particles (115)  and
 a parallel-plate capacitor as  a  charged particle  spectrometer
 (116) are discussed.

      A patent  on the  removal of  aerosol particles from a gas
 stream by an electrostatic field with preliminary charging of
 the particles  claims  increased efficiency by the  use of focusing
 electrostatic  or magnetic  lenses (117).

 PARTICLE COLLECTION

      Results are presented of  solutions to equations calculating
 the migration  and charge of particles in an electric field with
 a space charge and mixing  of the suspension in turbulent flow,
 in the collection of  a monodisperse dust in a tubular electro-
 static precipitator (118).

      In a theoretical  study of the  orientation of prolate ellip-
 soidal particles moving in an  electric field, the particle orien-
 tation time is related to  the  hydrodynamic moment (119) .

      A theory  is developed for the  deposition of  unipolarly
 charged particles in  an electrostatic field on grounded and
 insulated bodies (120,121).  Mathematical models  of the particle
 collection process have been derived (122).

      Equations were developed  for calculating the collection
 efficiency of  an electrostatic precipitator (Deutsch equation),
 the  electrical field at the  collection electrode, the effect
 of  the  ionic mobility,  and the effects of electrical field and
 current  on the collection  efficiency (123).

      The  deposition of  dust  particles from turbulent gas streams
 was  studied  and  the extent of error introduced into the calcula-
 tion  of  collection  efficiency of an electrostatic precipitator
 by the assumption of uniform mixing of dust in the gas flow
 was  estimated  for various  conditions (124,125).

     The  increase in the rate of gas cleaning by  proper design
of the corona  electrode, taking  into account the  character of
 the distribution of the dust across the electric  field, is dis-
cussed (126) .
                               10

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     Acoustic pretreatment  of  gases  from  open-hearth  furnaces
and sintering machines  increased  the collection  efficiency  of
an electrostatic  precipitator  (127).

     Coagulation  of  bipolarly  charged particles  in  an electric
field occurred  above a  critical value of  the  field  which  in-
creased with increasing charge.   The use  of an electric  field
for this purpose  is  of  value only for low particle  charges  (128).

ELECTRICAL  RESISTIVITY  OF PARTICULATE MATTER

     An instrument similar  to  the Lurgi  instrument  for measuring
the electrical  resistivity  of  dust under  industrial conditions
was developed.  The  principle  of  operation involves measuring
the resistance  of a  dust layer formed in  a corona discharge
field.  The dust  is  deposited  from the gas by the electric  field
produced by a corona discharge electrode  (129,130).

     In a second  method, a  layer  of  the dust  (extracted  from
the exhaust gas)  is  formed  by  pouring it  between two  flat filter
surfaces and then compressing  it  by  a standard load.   The use
of a filter as  an electrode makes it possible to draw gas through
the sample  (131).  A patent describes a similar  apparatus in
which the electrodes are in the form of cermet filters (132).

     Still  another method permits in-situ measurement of  dust
resistivity in  flue  gas.  The  dust-laden  gas  flows  into  a cyclone
from which  the  deposited dust  falls  into  a hopper that feeds
it to a cell equipped with  measuring electrodes  (133).

     Some factors affecting resistivitv of dusts are  discussed
(134) .

     The dielectric  strength of a dust layer  depends  on  the
packing coefficient, which  in  turn depends on the size and  shape
of the particles.  The  results of calculating the breakdown
gradient of the layer are given in equations.  The  good  agreement
with experiment indicates that they  can be used  to  determine
the onset of back corona (135).

     The potential of an electrostatic precipitator in weakly
developing  back corona  and  its dependence on  the specific elec-
trical resistivity of the dust was considered (136).

COMPOSITION AND PROPERTIES  OF  FLY ASH AND OTHER  DUSTS

     The effects  of  water-soluble components  of  cement dust
at various  temperatures and moisture contents on the  specific
electrical  resistivity  were determined (137).  Similar effects
of temperature  and moisture contents of tin metallurgy dusts
                                11

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 were studied (138).   The efficiency of an electrostatic precipi-
 tator in collecting  various metal oxides was determined (139) .
 Chemical and physical properties of dusts from a copper smelter
 were measured (140).   The chemical composition and physical
 properties of dust from the production of aluminum and the
 silicon-aluminum alloy silumin were measured (141).   Similar
 properties of dusts  occurring in the production of mercury were
 measured  (142).

      In the combustion of some lignites and brown coals, the
 relation of the sintering strength of fly ash to the chemical
 composition and particle size of the ash has been studied  (143).

      The shale burned in Baltic electric power stations produces
 an ash high in lime.   The ash is highly abrasive and because
 of the high ash content of the fuel, the inlet dust burden is
 very high  (100 g/m3)  (11).  Mechanical collectors are installed
 ahead of electrostatic precipitators for collecting the ash.
 The ash from some furnaces is well fused, forming cenopheres.
 In other instances,  the particles are mostly crystalline and
 irregular in shape,  with no evidence of fusion.  The combustible
 content of the ash is 0-20%.  The chemical composition of  fly
 ash from Kansk-Achinsk coal is reported (144) .

      The problem of  abrasion by fly ash is considered (145-148).
 The distribution of  adherent particles with respect to adhesion
 forces is discussed   (149).

      The combustion  of Ekibastuz coal presents problems due
 to the high mineral  content of the coal, the high silica content
 of the ash, and the  high temperatures required for satisfactory
 combustion in pulverized fuel fired furnaces (3,5,150,151).
 The abrasivity of the fly ash depends on the combustion tempera-
 ture,  reaching a maximum at 155°C in laboratory measurements.

      Some physico-mechanical characteristics of ash and slag
 from  thermal power plants are presented (152,153).  The varia-
 tion  of  free calcium  oxide in fly ash from Nazarovo coal is
 discussed (154).

     The  effect  of sulfur, oxides in the flue gas on the caking
 capacity  of  fly  ash was  studied.   With increasing content of
 sulfur oxides  in  flue gas,  there was a considerable increase
 in  the hardness of fly ash deposits (155) .   The effect of gas
 humidity  in  increasing the  collection efficiency of an industrial
 dust is discussed  (156).

     Conditioning agents  investigated for metallurgical dusts
 include:  acetic acid  (157),  ammonium sulfate (158), and ammonium
chloride  (159); the use of  naphthenate soap is patented (160).
                               12

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     The efficiency  in collecting high-resistivity  fly  ash  from
the combustion of Ekibastuz coal decreased  at  temperatures  above
120 C, but conditioning  the flue gas with ammonia was effective
in restoring the efficiency.   The optimum level  of  ammonia  addi-
tion was 25 ppm.  The conditioning  effect was  reflected in  changes
in the electrical parameters of the precipitator, in the decrease
of the electrical resistivity  of fly ash to 6  x  109 ohm-cm,
and in the increase  in collection efficiency from 88.5  to 98.3%
(3,9,161,162).

     A report published  later  concludes that ammonia is not
effective enough to  justify its cost and the logistical problems
involved in its use.  The  flue gas  can be sufficiently  condi-
tioned by a wet scrubber installed  upstream of the  precipitator.
Either a centrifugal scrubber  or a  venturi  followed by  a mist
eliminator can be used  (3).

ELECTRICAL ENERGIZATION

     The electrical  stability  of discharge  gaps  as  related  to
the problem of an impulse  power supply to an electrostatic  pre-
cipitator is discussed  (163).  New  electric sets for electro-
static precipitators are described  (164).   The use  of thymistors
for circuit control  is discussed  (165) .  Increasing the effective-
ness of the high-voltage supply on  electrostatic precipitators
is discussed (166,167).  Protecting high-voltage cables on  preci-
pitators from sparking is  discussed (168) .   Horizontal  multi-
field electrostatic  precipitators with electrodes 12 m  high,
a 16 m length of active  zone,  and an active cross-section of
up to 265 m2 are being installed on power units  of  300  MW or
more.  This geometry is  causing problems such  as reentrainment
of fly ash  (6,169).

RAPPING AND FLY ASH  REENTRAINMENT

     Optimum rapping regimes in collecting  fly ash  (170-174)
and their relation to reentrainment of fly  ash have been studied
(175-177).  The optimum  rapping interval with  a  constant thick-
ness of dust layer being deposited  in various  fields of the
precipitator is related  to:  the interval between raps  in the
first field, the same for  subsequent fields, the effective  migra-
tion velocity of particles in  the corresponding  fields,  and
the specific collecting  surface areas in the corresponding  fields
(173).

     The effectiveness of  removing  dust deposited on a  collection
electrode was found  to depend  on the direction of the rapping
impact, the type of  electrode  and the mechanical stability  of
the deposited layer, its porosity,  and its  total mass (178).
                               13

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      A graphical  method  for  optimizing  the rapping regime has
 been developed.   An  integral curve  was  constructed for evaluating
 the degree of rapping  a  12 m collection electrode.  The curve
 gives the relative surface area  on  which dust is deposited for
 a corresponding value  of rapping acceleration,  independent of
 the physico-chemical properties  of  the  dust (179) .

      Experiments  with  various rapping  intervals, to determine
 optimum rapping cycles,  have resulted  in reduction in emissions
 by 25 to 40%.  To ensure the required  schedule  for rapping the
 collection electrodes, special devices  have been developed -
 variators with adjustment of the gear  ratio from 1:8 to 1:72,
 which avoid the complication of  the commutation system and
 facilitate the operation of  the  drives  and mechanisms.  The
 variators have high  operating reliability (11,175).

      Suppression  of  dust carryover  by  strong electric fields
 is described (180).

 GAS FLOW

      Studies have been carried out  over several years on the
 effects of non-uniformity of gas flow  on the efficiency of preci-
 pitators in collecting dusts, mostly fly ash.  Studies of fly
 ash concentrations  in  the vertical  plane of a precipitator out-
 let have shown higher  concentrations of fly ash near the bottom
 in the lower part of the equipment. The design of inlet and
 outlet sections of  the precipitator and of baffles to achieve
 uniform gas flow  has been experimentally investigated by means
 of aerodynamic models  (122,181-187).

      The problems in the uniformity of  gas flow presented by
 the use of high  (10-12 m) electrodes in new precipitators in-
 stalled in power  plants  have been studied and designs for dif-
 fuser  grids suggested  (188,189).

      Some of the  changes in  precipitator design also reduce
 the reentrainment of agglomerated fly  ash from  the collection
 electrode (11,19).

     Correcting an uneven gas flow  by  incorporating air distri-
 bution  plates  into an  electrostatic precipitator installed at
 a cement  plant increased  its  collection efficiency from 98.4%
 to  98.8-99.2%  (190).

     Electrostatic precipitators  with flow of the dust-laden
gas transverse to the  electrodes  were efficient in the collec-
tion of high-resistivity dust, e.c,., lead smelter fumes from
a sintering plant (191).       ~
                               14

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     A coefficient of  non-uniformity  was  introduced  into  the
Deutsch equation.  The predicted  dependence  of  collection ef-
ficiency on  this coefficient  was  verified by tests on  a full-
scale precipitator in  a power station (192).

     The effect of turbulence in  the  gas  stream on the deposi-
tion of aerosol particles  in  a tubular  precipitator  has been
studied with  a computerized mathematical  model  (193,194).

     One simplified  model  that has  been suggested  for  the study
of turbulent  diffusion of  particles suspended in a linear gas
flow assumes  constant  gas  flow and  neglects  factors  such  as
molecular particle diffusion, turbulent particle diffusion along
the flow direction,  and inertial  effects  (195).

     The mechanics of  removing fly  ash  from  precipitator  hoppers
and transporting it  by wet and dry  processes are discussed (196-
202) .

     A system of ash removal  with the aid of an air  duct  is
described.   It is used for handling ash from combustion of a
mixture of Kansk-Achinsk and  Borodino coals.   The  ash  has cement-
ing properties  (203).

     The effect of initial ash deposits on high temperature
corrosion of  boiler  steel  was studied (204).   An internal struc-
ture designed to reduce corrosion was patented  (205).

     Procedures for  installation, maintenance,  and testing of
electrostatic precipitators in electric power plants have been
published  (206,207).

     Industrial uses of fly ash are described (208,209).

WET ELECTROSTATIC PRECIPITATORS

     Tests on a 3-field tubular wet electrostatic precipitator
of industrial size showed  it  to be  effective  in collecting
hazardous silica dust  (210).

     A process for wet dust collection  is based  on preliminary
charging of  aerosol  particles (sodium silicofluoride dust).
The collection efficiency  and the relation of particle charge
to dust loading and  corona potential  were studied  (211).

     A method for preliminary charging  of an  aerosol by corona
and collection on a  liquid film or  foam is described (212).
                               15

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      A wet electrostatic precipitator was more  effective than
 a turbulent scrubber  or a dry glass  fiber filter  in collecting
 an ionizaEle additive in an experimental magnetohydrodynamic
 apparatus  (213,214).

      A patent describes a process of cleaning a gas of dust
 by passing it through a liquid on which is  imposed  an electric
 field of  30-200  A/m2  (215).

 INDUSTRIAL APPLICATIONS

      Electrostatic  precipitators and scrubbers  are  recommended
 for removing dust and hydrogen fluoride in  cleaning gases from
 aluminum  cells (216).  The condensation of  tarry  products from
 the gas in the precipitator was investigated  (217) .  The perfor-
 mance of  a two-stage  system was studied  (218).

      Discussions of the use of electrostatic  precipitators in
 nonferrous metallurgical operations  include a review on research
 in the U.S.S.R.  on  the subject  (219) and accounts of specific
 applications:  mercury production  (142,220,221);  copper pro-
 duction (222-224),  roasting of copper and zinc  ores and pyrites
 (225,226),  and arsenic recovery  (227,228).

      A study of  the electrostatic precipitator  in collecting
 the fumes  in process  gases at high temperatures at  a tin smelter
 showed that an increase in the temperature  of collection did
 not decrease the collection efficiency, but decreased the content
 of  arsenic in  the sublimate and the  amount  of water vapor in
 the gas phase.   As  a  result the working life  of the precipitator
 was increased  (229).

      Applications in  the iron and steel industry  are discussed
 in  general  (230-235).

      Electrostatic  precipitators with needle  discharge electrodes
 and C-shaped collecting electrodes, with three  fields, effective
 cross-section  70 m2, were installed on a 400-ton  open-hearth
 furnace, with  oxygen  lancing (236).

      In studies  of  factors affecting performance  of precipitators
 installed on open-hearth furnaces, precipitators  were satisfac-
 torily operated  on  open-hearth furnaces without oxygen lancing,
but with it humidifying the gas was required  (237-239).

     The performance of combined wet scrubbers  and  electrostatic
 .n?il:ators  in tandem on an open-hearth furnace is described
 (240,241).
                               16

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     Electrostatic precipitators  used  to  recover  iron ore  fumes
from roasting machines had designs  based  on  needle  corona  elec-
trodes and C-shaped collection electrodes (242) .

     Other industrial applications  for  electrostatic precipita-
tors include:   the cleaning  of coke oven  gases  (243), mist re-
covery in sulfuric acid manufacturing  (needle corona electrodes
are used)  (227,244,245);  cleaning gases in high-resistivity
magnesite dust  (246-249); cleaning  gases  in  the production of
carbon black  (250,251); cleaning  of kiln  gas in cement manufac-
turing (190) , including a discussion of some operating problems
(252); dust  removal in the manufacture  of fire  brick  (253)  and
from gases emitted from rotary kilns for  baking clay  (254);
cleaning gases  from kilns for electrode production  (255);  and
cleaning gases  from burning  dolomite (256).
                                17

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                             SECTION 3

                           WET SCRUBBERS
 USE IN ELECTRIC POWER PLANTS

      Wet dust collectors with venturi  coagulators installed
 on power units with a capacity of up to 200 MW are widely em-
 ployed at electric power plants of the U.S.S.R.  (257).  These
 devices collect 95-97% of the ash from flue gases with a total
 specific consumption of water of up to 0.25 1/m3  and hydraulic
 resistance of 80-120 kg/m2.   The flue  gases are cooled in the
 collectors to 50-70°C and on emission  have a temperature approxi-
 mately 20°C higher than the  wet-bulb temperature thermometer.
 This condition is used to prevent corrosion of the ducts and
 stacks, since the gases are  not re-heated following the col-
 lector.

      Attempts to improve the design of the collector led to
 the development of wet, high-speed ash collectors.  The basic
 feature of these collectors  is the shortening, in comparison
 with the normal design, of the intake  duct, which is a venturi
 coagulator with a rectangular cross section which immediately
 adjoins the housing of the apparatus without any intermediate
 sections.   The relatively large apex angles of the diffusor
 and convergent channel of the coagulator permit reducing its
 length in  comparison with regular design, thereby providing
 normal irrigation of the coagulator walls over their entire
 length and preventing the formation of deposits on poorly mois-
 tened  sections of the walls.

     Placed in front of the  coagulator of. the apparatus is a
 small  section for acceleration of large fly ash particles to
 velocities of at  least 15 m/sec,  which enhances somewhat their
 capture by drops  of water in  the  coagulator but more important,
 provides an intensive abrasion,  by the coarse ash particles,
 of  the  deposits which form at the boundaries of the dry and
 irrigated  portions  of the walls  of the convergent channel.
 The stabilization of  the  dimensions of the boundary deposits
 attained here  prevents  the increase in the hydraulic resistance
of the  ash  collector  caused by the growth of these deposits
 (147,199,257-260).

     In the 1950's  and  1960's,  centrifugal scrubbers were widely
used in electric  power  plants of  the U.S.S.R. for cleaning flue


                                18

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gases.   In  recent  years,  these devices  have been improved by
redesigning the  intake duct to a venturi  type.   As a result,
the efficiency of  collecting the fly ash  increased to 97-98%.
However,  despite such high efficiencies,  wet scrubbers are used
only on  units with capacities of less than 200  MW.  This limi-
tation is connected with  the inevitable cooling of the flue
gas in the  scrubber and the corresponding poorer dissipation
in the atmosphere  of the  gases emitted  from the stack.  Work
on the improvement of wet ash collectors  is at  present being
conducted in the direction of further increases in effectiveness
and on the  possibility of spraying with water in closed loop
ash-removal systems (259,261).

     As  the practice of operating ash collectors with venturi
coagulator  tubes for many years shows,  they are very reliable
and effective devices with a high collection efficiency, 96.5-
97%, which  is sufficient  in many installations  (262).

     At  the same time, the increased requirements for protection
of the atmosphere  and the growth in capacities  of boiler units
and electric power plants in general urgently require a further
reduction in the fly ash  content of the effluent gases and the
attainment  of a  collection efficiency of  99% for electric power
plants of medium size equipped with boiler units of up to 650
tons of  steam per  hour.

     To  explore  the possibilities of increasing the collection
efficiency  of these devices, the effect of various parameters
on the process of  capture of ash particles by drops of atomized
liquid in venturi  tubes was analyzed, and a mathematical model
of the process was developed taking into  account the continuous
change in the velocity of the fly ash particles and water drop-
lets in  the venturi and with consideration of the transformation
of the polydisperse distribution of the fly ash particles and
water drops according to  size (262).

     An  increase in the particle residence time in the venturi,
i..e. , an  increase  in the  length of the  tube, has a positive
effect.   The rates of gas flow in the throat which are used
in practice, on  the order of 60 m/sec,  are optimum for larger
particles.

     The  consumption of atomized water  on the order of 0.12-
0.14 1/m3(NTP) which is at present used is also optimum in the
sense that  increasing it  substantially  increases the cost of
scrubbing and increases only insignificantly the collection
efficiency.

     A change in the size of the water  droplets affects the
degree of collection noticeably.   At the  same time, a reduction
in the droplet size,  for  the same amount  of consumption of


                                19

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 water,  although it reduces  the  collection of particles on an
 individual droplet,  as  a consequence  of the sharp increase in
 the number of droplets  leads to a noticeable increase in col-
 lection.

      The  best approach  to an intensification of the capture
 of particles by droplets in the venturi is an increase in the
 fineness  of atomization of  the  water.   Full-scale tests of this
 conclusion were conducted which confirm its validity (262,263).

 MECHANISMS OF ACTION

      Several theoretical papers on diffusiophoresis and thermo-
 phoresis  and their roles in scrubber  action have been published.
 Expressions have been derived for the rates of diffusiophoresis
 and Stefan flow of small volatile aerosol particles in a binary
 gas mixture in which one component is the same substance as
 that of the particles (e.g_., water droplets in wet air) (264).
 The rates of diffusiophoresis of large non-volatile aerosol
 particles (265) and volatile particles of medium size were studied
 (266).  During vaporization of  a drop, the velocity of the pos-
 sible hydrodynamic flow (Stefan flow)  is of the size of terms
 that can  be neglected (267).  Efficiency of collection of aerosol
 particles by Stefan flow was analyzed (268).

      The  theory of thermophoresis of  volatile aerosol particles
 and its relation to the Knudsen number are discussed (269-274).
 The role  of thermophoresis  and  diffusiophoresis processes in
 cloud formation are discussed (275).   These forces are negligible
 in aerosol sedimentation (276).  Photophoresis can also be in-
 volved  (277).

      The  theory of thermophoresis and diffusiophoresis is dis-
 cussed  in terms of equations accounting for isothermal, thermal,
 and diffusion  flow (278).

      Equations for the  thermodiffusiophoretic forces and the
 drag  forces  of the medium have  been derived that take into
 account the  volatility  of the collecting drops.  The effect
 of  the  volatility  is  proportional to  the ratio of the radius
 of  the  drop  to the mean  free path in  the supporting gas, but
 is  generally less  than  1%  (274).

      In a  system containing large spherical drops, solid parti-
 cles, and  gas  bubbles,  hydrodynamic theory shows that a general
 formula for  the rate  of  thermophoresis contains two terms.
 The first  is proportional to the coefficient of thermal slippage
of  the surface  of  the particle,  and the second is the derivative
of  the surface  tension relative  to temperature (279) .
                               20

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      An equation was obtained for the rate and intensity of
 thermodiffusiophoresis in a multi-component gas.   The equation
 includes allowances for dynamic viscosity, particle radius,
 diffusion slip of the gases, thermal conductivity of the gases
 and  particles, mean free path of the gas molecules, density
 of  the  components, and gas temperature (280).

      Aerosol deposition mechanisms occurring in water vapor
 diffusion fields were studied in a vertical plane-parallel
 channel in which dusty, vapor-supersaturated air  was cooled.
 Aerosol sedimentation in water vapor diffusion fields is prim-
 arily due to diffusive forces.  The contributions of thermo-
 diffusion and diffusiophoresis to sedimentation are negligible
 (276) .   A mathematical model for the formation of aerosol parti-
 cles by condensation of supersaturated vapor was  prepared (281).

      Experiments were conducted on the deposition of molecules
 on  spherical aerosol particles (282).  Experimental observations
 showed  that fluctuations in temperature, pressure, and humidity
 favor the formation of large droplets by condensation (283).
 Aerosol particle motion and capture with relation to growing
 or  evaporating drops was studied (272,284).  Trajectories of
 volatile aerosol particles were studied (285).

      Condensation in Venturis was found to be  effective in re-
 moving  hydrophobic particles (286-290).  Condensation of a dense
 vapor flow was investigated (291).

      The kinetics of diffusive growth of particles were measured
 (292-294) .    The role of molecular forces in the  coagulation
 of  liquid aerosol particles is not large (295) .  The dependence
 of  molecular forces on particle size was studied  (296).

      Improved collection efficiency resulted from preliminary
 electrification of the aerosol collected by wet scrubbing (297);
 this was observed especially for the finer fractions of the
 aerosol.   The effect was found in the collection  of sodium fluo-
 silicate aerosol in a laboratory foam scrubber.  The growth
 rate of drops in an electric field was 2.5-fold higher than
 without the field (298).  The deposition of dust  particles on
 droplets from ultrasonic atomization was investigated (299).

 TYPES OF SCRUBBERS

      A  survey of scrubbers available for removing dust from
 gases was made (300) ,  factors involved in selecting a scrubber
 are  discussed (301) ,  and prices are given for  installed scrub-
 bers  (302) .

     For  dust collection in sieve-plate or packed spray columns,
 information has  been published on pressure drop (303-305), criti-
cal parameters and calculations of  foaming conditions (306-308),


                                21

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 hydraulic resistance (309-312),  liquid entrainment (313,314)
 and collection efficiency (315).

      For collection of fly ash and other industrial particulate
 matter in venturi scrubbers, information has been published
 on: component equipment for power plants (261); calculation
 of collection efficiency for soot (316); droplet size distri-
 bution for fly ash collection (317);  use of wetting agents in
 collecting fly ash (318); calculation of collection efficiency
 (319) ; derivation of formulas for fractional collection effi-
 ciency which take into consideration the size distribution of
 the droplets (320) ; use of design factors in investigating
 scrubber processes (321); comparison of ejection-type venturi
 scrubbers with the usual venturi  (322);  type of atomizer  (323);
 experimental determination of the effect of the extent of atomi-
 zation of the water in the action of venturi fly ash collectors
 up to 25 kg/cm2 (324) ; selection of optimal parameters of ven-
 turi tubes for cleaning gases from open-hearth furnaces and
 converters (325,326)  and in lime regenerating kilns (327); the
 need for using a droplet size distribution in the design of
 a venturi (328) ; the use of a lO^mVhr pilot-scale venturi scrub-
 ber for evaluating performance parameters (329).

      In a study of the hydraulic resistance of a venturi tube
 with an irrigated diffuser, the  location of spray nozzles for
 uniform irrigation was determined (323,330,331).  An empirical
 relation of  the coefficient of hydraulic resistance to operating
 parameters was obtained (332).  The effects of particle aggrega-
 tion (333) and viscosity of the  liquid (334) were noted.

      The degree of dispersion of  water droplets at different
 gas velocities, throughputs, and  atomizer locations in the
 throat of a  venturi scrubber was  measured by light scattering
 (335).   A similar study allowed  a rational choice of droplet
 size to be made (336).   Another  defined the upper limit on two-
 phase  flow (337).

     On the  basis of  a study of  liquid dispersion, the theory
 of  coagulation, and data  on hydraulic resistance, a system of
 equations was  obtained for aid in selecting equipment (338).

     Heat transfer processes in  venturi  and packed scrubbers
 were studied  (339-341).

     The  chemical  and  mineralogical compositions of deposits
 formed  in a spray  grid-packed  scrubber in a power plant were
 about  the same  as  those  for  the  fly ash  (342).

     The  collection efficiency for  fly ash was measured and
calculated for  a centrifugal scrubber (343).  A conical scrubber
with a  fluidized bed of spherical packing was designed  (344),
and one with coaxial tubes (345).

                               22

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     The  performance  of  a wet dust collector  with a disk liquid
atomizer  was  examined and a statistical model suggested (346).

     The  efficiency of a scrubber collecting  by impaction was
measured  (347).

     A  foam-vortex scrubber was designed and  tested as a dust
collector and gas absorber (348).

     The  collection efficiencies of various scrubber designs
were measured (349).

     A  high-capacity, high-efficiency vortex  type absorber for
gas absorption and particulate retention from industrial waste
gases is  described.   The turbulent motion of  tangentially ad-
mitted  gas streams is increased by the vortex generator, whereby
the wash  liquid  admitted into the contact zone is disintegrated
to droplets (350).

     A  method for the determination of statistical characteris-
tics of the motion of suspended particles in  a turbulent flow
was developed.   Previously derived differential equations de-
scribing  the  motion of solid suspended particles in a fluid
pulsating stream were used, specifically in the case of slowly
pulsating turbulent flows of low Reynolds numbers of 1-10.
The moments of the first two orders of a random function were
obtained, which  characterize the velocity of  the suspended
particle  (351).

INDUSTRIAL APPLICATIONS

     Scrubber applications in the iron and steel industry are
described (352);  installations on cupolas are discussed (353).

     The  performance  of  a scrubber-electrostatic precipitator
combination was  analyzed as a function of gas temperature,
velocity, and the number of electrical sets in the precipitator
(354).  It was shown  that preliminary cooling of the open-hearth
gases prior to venturi scrubbers was of no advantage (355).
The performance  of venturi scrubbers on open-hearth furnaces
was studied (356-358).

     Studies  of  design and operating parameters in applying
scrubbers to  gases from  electric steel furnaces are described
(352,359-367).

     The  use  of  scrubbers on oxygen converters is described
(368,369).  They  are  compared with electrostatic precipitators
on converters  (370) and  ore dressing plants (371).   Their use
on sintering  machines is noted (372,373).
                                23

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     Heat  transfer calculations are given  for  scrubbers under
pressure on blast furnaces  (374).

     Applications for cleaning gases  in  the  aluminum industry
have been  discussed  in  a number of articles  (375-377) :   the
design  of  a grating-type scrubber  (378); the redesign of a
vertical-louver  scrubber to reduce deposits  on the louvers
 (379);  the composition  of alkaline scrubbing liquids (380);
determining the  extent  of drop entrainment (381);  the use of
a  scrubber with  suspended spherical packing  (382); a comparison
of  types of scrubbers,  which  indicated  that  the rate of dust
removal was highest  for fluidized bed scrubbers and lowest for
foam scrubbers  (383); studies of the  design  and operating param-
eters for  spray  chambers  (384,385); a comparison of scrubbers
with electrostatic precipitators  (216);  and  the use of  surface-
active  agents  (386).

     Scrubbers are also used  for cleaning  stack gases in sulfuric
acid manufacture  (387), and in carbon black  production  (251).
A moving bed scrubber is used for collection of sodium  fluoride
dust (388).

     The cleaning of roaster gas containing  5  g/m3 of arsenic
was studied with a dry  electrostatic  precipitator, a packed
scrubber,  and a wet  electrostatic precipitator in  series (228)
and with a venturi scrubber (389).  Scrubbers  on copper smelters
are described  (390) .

     Other applications include the use of a high-efficiency
scrubber in aluminosilicate roasting  ovens  (391);  scrubbers
containing a moving bed of plastic spheres plus a  cyclone in
silicate production  (392) , and the recovery  of an  ionizable
additive in an experimental magnetohydrodynamic apparatus (213,214).
                               24

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                             SECTION 4

                          FABRIC FILTERS


      Fabric filters (baghouses)  are apparently not installed
on  electric power boilers in the U.S.S.R.   They are widely used
for the  control of other industrial sources of particulate emis-
sions, such as metallurgical operations.

      A large body of information is published in the U.S.S.R.
on  the theory and mechanisms of  collection of particles in
fibrous  filters.  Also the  design of baghouses and the selection
and use  of  filter fabrics are well covered in the Russian liter-
ature.   Some of the more recent  information on these topics
is  included (393) .

COLLECTION  MECHANISMS

      The theory of filtration is described (394).  The upper
and lower limits of aerosol penetration through a fibrous filter
at  Peclet numbers <1 were estimated theoretically by assuming
a haphazardly interwoven network with the  axes of fibers parallel
to  the plane of flow (395).

      A new  filtration theory based on the  inertial theory of
deposition  but including coulombic forces  acting in the collec-
tion of  particles is presented (396) .

      An  experimental and theoretical study was made of the
action of a fibrous filter  collecting particles by diffusion
(397).   The dependence of pressure drop across a filter on the
Knudsen  number was studied  experimentally  and theoretically
for  a simple model of parallel cylinders perpendicular to the
gas  flow (398-400).   Calculated  and measured penetrations were
obtained for filters made of fibers ^1 ppm in diameter (401).
The  behavior of suspended particles near hard walls was studied
(402,403).

      A theoretical equation for  the separation of aerosols by
a cylindrical  filter was developed (404).   Equations are pre-
sented for  describing one-dimensional non-stationary gas filtra-
tion  in  porous media (405).

      The  cleaning  process in bag  filters was studied with the
aid of beta  radiation attenuation  of the deposited dust layers
(406,407).

                               25

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      Equations  were  obtained  that  relate  performance to filter
 parameters (408) .

      The flux of  gas molecules  toward  a suspended particle was
 calculated;  comparison  with experiment was  hindered by the lack
 of data (282).   The  statistical characteristics of the motion
 of suspended particles  as  related  to the  gas flow were studied
 (351).

      The aerodynamics of dust-removal  apparatus are discussed
 (409).   The  hydraulic characteristics  of  filter materials were
 investigated (410).   The determination of the mean radius of
 filter  fibers  is  reported  (411).

      A simplified model was used for the  study of turbulent
 diffusion of particles  suspended in a  flowing gas (195).   Theory
 was developed  for the settling  of  aerosol particles from turbu-
 lent gas flow  and it was shown  that the mechanism and velocity
 of turbulent inertial settling  of  aerosols  is governed by the
 effect  of the  transverse migration of  particles to the walls
 (412,413).

      A process  is described in  which gases  are filtered with
 prior electrical  charging  of  the dust  particles, with periodic
 charging of  the filter  with the same sign for regeneration (414).

      Calculations were  made to  show that  the efficiency of a
 self-cleaning  filter depends  on the fiber length (415).   Investi
 gation  of the empirical relationship of capture coefficient
 to the  packing  density  of  a filter showed that with an increase
 in packing density the  deposition  increases as the result of
 particle inertia  and capture  (416).

      The effect of ultrasound on filtration by small capillary
 filters was  reported (417).   The  flow of air through a porous
 metal barrier was studied  (418),  as well  as the two-dimensional
 flow of dust-laden gas  through  a nozzle  (419).  Capture coef-
 ficients were calculated for  spheres at high Reynolds numbers
 (420).   Capture coefficients  by star-shaped collectors were
 measured (421).

      Methods were  developed for estimating  the extent of filling
 of pores of  different sizes,  for  relation to filter performance
 (422).

      A  study was  made of the  volume and surface characteristics
of lubricants defining  the film thickness of panels of self-
cleaning filters  (423).

     An  investigation showed  that  the  hydrodynamic resistance
of a  layer of mixed  fibers is less than the sum of the resist-
ances of equivalent  layers of uniform  fibers (424).  Multilayer
fiber filters were studied (425).

                                26

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     A  method  was developed for  calculating the capture coef-
ficient based  on diffusion and entanglement of particles,  in-
cluding an  allowance for  gas slippage around the fibers,  the
polydispersity of the fibers,  and the non-uniformity of filter
structure  (426).

BAGHOUSES

     A  bag  filter holder  was designed with separate  chambers
for  dusty and  cleaned gas (427).   Mechanical structures for
improved regeneration of  bag filters are described (428,429).

     On the basis of experimental data on the dust distribution
in a bag, an empirical equation  was obtained from which the
geometrical parameters of the bag can be evaluated in dependence
on the  gas  flow rate (430).

     Twisting  a bag filter was found to be superior  to reverse
jet  cleaning for increasing the  filter action without increasing
the  filter  resistance (431).  Regeneration by fabric deformation
 (432) and mechanical shaking with an electric vibrator (433),
reverse jet (434), and pulsation (435) are described.

     Various bag constructions are given:  a truncated cone
 (436),  centrifugal regeneration  (437), improved support struc-
tures  (438) .

     A  technical-economic evaluation was made of fabric filter
installations  handling 100,000 m3/hr gas flow with different
methods of  regeneration (439).

     Studies were made of regeneration, by vacuum and ultrasonic
processes,  of  non-woven fabrics  made from synthetic  fibers (440),
and  a method for regeneration was patented (441).

     Correlations were made of the structure and properties
of filter fabrics with the basic indexes of filtration of  dust-
laden gases (442).

     The relationship of  air flow resistance to time and the
breakthrough of a filter  were measured (443).  The mechanisms
of deposition  of particles on a  metalloceramic metallurgical
filter  were investigated  (444) .

     A  survey  of applications and methods of regeneration  was
recently published (445) .

FILTER  FABRICS

     A  standard  aerosol was  used  to determine the filtration
properties  of  synthetic fabrics  (446).  Quartz dust  was used
for  a similar  study (447).


                                27

-------
      Information on various glass fiber  fabrics  is  presented
 (448).   The  tensile strength of glass  fiber  was  maximum at 80-
 100°C but depended on the absolute humidity  of the  air  (449) .
 The  durability of glass fibers in filters  is maximum at some
 temperature  below 200°C  (450).  The physical properties of glass-
 fiber filters containing organic phosphates  were determined
 (451) .

      Metal-ceramic fibers for metallurgical  filters are described
 (452),  as are metal fabrics  (453, 454) and ceramic  filters for
 recovery of  carbon black  (455).

      Fabrics made of metallic  fibers were  found  to  be suitable
 for  use in collecting dust from blast  furnace gas and electric
 furnaces and in ore-dressing plants.   After  a precoat layer
 was  formed on a fabric with a  linear pore  size of about 100
 lam,  the gas  was filtered at 25 m3/min  at 700-800°C  (456).   New
 polyamide fibers appear to have greater  thermomechanical sta-
 bility than  glass fibers  (up to 300°C)  (393,457).

      Titanium dioxide was recovered from flue gas by a metal
 ceramic filter made by sintering a 0.1 mm  steel  powder  (458).

      A separator constructed of porous sintered  nickel-copper
 tubes used for collecting metallurgical  dusts is patented.
 It is regenerated by reverse air flow  (459).

      Fibers  made of ion-exchange materials were  used for separa-
 tion  of liquid aerosol materials in the  cleaning of galvanizing
 equipment emissions  (460).


 MIST  ELIMINATORS

 3    The development of high-velocity  (gas volumes  up to 30,000
 m /hr)  mist  eliminators is described  (461).   Glass  fibers or
 synthetic fibers are used.  The mechanism  of action, including
 liquid  droplet collection and migration, has been studied  (461-
 464).   Louver-type designs have been investigated (465,466).

     A  column containing perforated caps covered by filtering
material was patented (467), and a cartridge design containing
glass fibers (1.5 urn in diameter) was  described  (468).   The
optimum structure of polypropylene fiber felts for  acid droplet
collection was found to be based on a  fiber  diameter of 15-20
ym (469,470).  The collection efficiency of  a 3  ym-diameter
filament vibrated by sound was determined  (471).
                               28

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INDUSTRIAL APPLICATIONS

     Applications of  fabric  filters  include  their use  for col-
lecting metallurgical  fumes  from open-hearth furnaces  before
passage through waste-heat boilers  (472) , oxygen converters
(370) , and electric furnaces  (473).  A  rotary dust collector
made with a metallic  fabric,  tested  in  a  sintering plant, showed
87-90% collection efficiency  (474).

     The use of fabric filters  in non-ferrous metallurgy includes
ore smelters  (228,475-481).   They are also used in the produc-
tion of carbon black  (482,483), titanium  dioxide  (484), and
cement  (485).

     Bag filters of synthetic fiber  fabrics  were superior to
high-pressure venturi  scrubbers for  removing dust from gas from
a silicon smeltering  furnace  (486).
                               29

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                             SECTION  5

                         OTHER COLLECTORS
 CYCLONES

      Cyclones  and  similar  mechanical  collectors  for  gas cleaning
 are discussed  in several  articles  (485,487-501).

      Applications  that  are considered include electric power
 plants (495,501-506), open-hearth  furnaces  (507),  coke ovens
 (508), chemical plants  (509),  and  catalyst  beds  (510,511).

      Experimental  designs  and  studies of  gas  flow  in cyclones
 are presented  (500,503,512-521)  and methods for  analyzing and
 improving their operation  are  suggested  (522-530).

      For  cleaning  flue  gases  at  electric  power plants, batteries"
 of  cyclones with collection efficiencies  of 94-95%  are used.
 The use of these devices  is limited to units  with  boiler ratings
 of  up to  420 tons/hr  burning  low-ash  fuels  such  as  peat (531)
 and coal  from  the  Kansk-Achinsk  deposit  (6).

 GRANULAR  BED FILTERS
      The  use  of  granular  bed  filters  for  recovering carbon black
 from  combustion  gases  at  600  C is  described (532);  designs have
 been  patented (533).   The use of electrically charged granules
 was patented  (534).  Applications  for granular bed  filters
 include metallurgy  (535), cement manufacturing (536), and the
 collection  of silica particles (537).

      A high-gradient magnetic filter  with a bed of  8-mm steel
 balls was tested for the  removal of dust  (60 m3/min)  from a
 900-ton open-hearth furnace.   At the  optimum voltage of 80-120
 kA/m, the collection efficiency was 80-90%, and the energy con-
 sumption was  0.05 kWh/1000 m3  of gas.  Without the  magnetic
 field the collection efficiency was 25-30% (538).

 ACOUSTICAL  PROCESSES IN PARTICLE COLLECTION

      Several  investigations have been reported on the acoustic
 coagulation of aerosols.   The  designs and mechanisms of acoustic
 generators  are described  (539-541).   Their possible use in power
plants for  cleaning stack gases is considered (542).  Acoustic


                                30

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coagulation of shale dust is described  (543).  A gas-jet acoustic
generator was effective  in coagulation of carbon black particles
(544) .  The rate of coagulation of an aerosol  in an acoustic
field was measured as a  function of particle size and other
parameters  (545).  The variation in mobility of small particles
in an acoustic field causes a sizable deviation in diffusivity
(546).
                               31

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                             SECTION  6

                 SAMPLING AND MEASUREMENT METHODS


      Studies of impactors  include  their  use in sampling dust
 from aluminum pot  lines  and  measuring  its  electrical resistivity
 (151)  and in sampling  sulfuric  acid  mist (547).   Work on im-
 pactors has also included  their use  in sampling gases with dust
 loadings of 5-7 g/m3  at  100°C (548), and studies of their accuracy
 (549), efficiency  (550),  and calibration (551).   Designs were
 developed for multi-stage  impactors  (552,553).   A grease for
 retaining deposited  particles is patented  (554).

      Information has been  published  on filters for sampling
 dust emissions from  aluminum pot lines (555)  and on metal fiber
 filters for sampling hot gases  (556,557).   Compact automatic
 sampling devices,  in which aerosol particles are captured by
 a fiber filter, have been  developed  (558-561).

      Techniques and  apparatus for  sampling hot and corrosive
 gases (562)  and for  maintaining isokinetic sampling are described
 (563,564).   A tape feed  mechanism  was  developed for aerosol
 sampling (565).  An  electrostatic  precipitator for sampling
 dust is described  (566).   A probe  connected to a thimble filter
 and a capacitor were developed  for measuring the charge on
 aerosol particles  in gas streams (567).

      Various techniques  for  determining  particle size distribution
 of  particulate matter  are  described  (553,568-575).  In one type
 of  analyzer, a rotary  centrifuge draws the dust-laden gas through
 a channel in the rotor and the  particles are separated by centri-
 fugal  force  (576).   Flue gas probes  for  determining particle
 size distribution  have been  used (577, 578).   A thermal coagu-
 lation technique for determining particle  size distribution
 was developed (579).   Techniques for measuring particle tra-
 jectories are discussed  (580).

     Methods and apparatus for  generating  sodium chloride aero-
 sols are  described (581).   The  production  of model aerosols
 from solution is discussed (582) .  A model developed for calcu-
 lating  the particle-size distribution  of coagulated aerosols
 gives  a nearly  log-normal  distribution (583).

     Techniques for  studying the microphysical characteristics
of  liquid aerosols in  industrial emissions are discussed  (584) .


                                32

-------
     The determination of  the angle of  repose of dust  is de-
scribed  (585) as well as its cohesion  (586,587) and wettability
(588) .

     A list of basic equipment used in  dust and gas research
is given  (589).  Techniques for determining the dust loading
of flue gases (590-592) and the concentration and properties
of dusts are described  (593).

     A method of measuring dust loadings  in flue gas in the
stack is based on deposition of an electric charge by  the  impact
of the dust particles in an air jet  (594).

     A differential thermal method  (595)  and a capacitance
method  (596) for determining the concentration of combustible
matter in fly ash were developed.

     The determination of  gas humidity  (597), dew point  (598),
and true density of dust  (599) are described.

     The measurement of electrical resistivity of fly  ash is
discussed in Section 2 of  the report.
                               33

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                          34

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                              35

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                              37

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 41  Popkov, V.I.   Characteristics of Unipolar Corona With
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 42  Zykov, V.A.  Dynamic Method of Determining Ion Mobility
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 43  Mirzabekyan,  G.Z.,  and I.N. Grigor'yev.  Effect of a Charged
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 44  Mirzabekyan,  G.Z.,  I.K. Reshidov, V.I. Udalova, I.A.
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 45   Mirzabekyan,  G.Z., and V.I. Udalova.   Measuring the Electric
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     Elektrichestvo 1974(1);5.
                              38

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46  Rychkov, V.P., and B.P. Volgin.   Effect of Free Radicals
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47  Avrutskiy, V.A., and  V.N. Koshchiyenko.   Origin of Ef-
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48  Levitov, V.I.f A.G.  Lyapin,  and  E.N.  Shevtzov.  On Transi-
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49  Bogdanova,  N.B., and V.I. Popkov.  Corona  Discharge
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50  Kravchenko, V.D.,  and V.I.  Levitov.   The Effect of
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51  Levitov, V.I., and V.M.  Tkachenko.   The Limiting Electric
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52  Apukhtina,  Ye-G.   Similarity of  the  Breakdown  Voltage at
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53  Kolechitskiy, E.S.,  and  N.A. Melikov.  Calculation of
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54  Nagornyy, V.V., and  I.K.  Reshidov.   Effect of  Transitional
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55  Bazelyan, E.M., V.I. Levitov,  and I.G. Pulavskaya.
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56  Burgsdorf,  V.V., and V.N. Vozlinskiy.  Study of
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                              39

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57  Babinets, O.L., and Ye.V. Ratnikov.  Sputtering of Film
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58  Avseyevich, O.I., and I.G. Nekrashevich.  Electrical Erosion
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59  Rusin, Yu.S.  Determination of Corona Initiation Voltage
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60  Vereshchagin, I.P.  Calculation of Initial Field Intensities
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61  Levitov, V.I., and V.M. Tkachenko.  Electrical
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62  Tkachenko, V.M., and A.I. Valuyev.  Effectiveness
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63  Levitov, V.I., and V.M. Tkachenko.  Electrical Charac-
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64  Levitov, V.I., and V.M. Tkachenko.  Effect of the
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65  Reshidov, I.K., and I.V. Yermilov.  Electrical Pre-
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66  Levitov, V.I., and V.M. Tkachenko.  The Relation
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                             40

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67  Mirzabekyan, G.Z.f I.K. Reshidov,  I.A. Kizim, V.I.
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68  Vasyayev, V.I., and I.P. Vereshchagin.  Towards Calculating
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69  Afanas'yev, V.V., and N.A. Dobryanskaya.  Mathematical Model
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70  Aleksandrov, A.F., V.V. Perebeinos, A.T. Savichev, and
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71  Afanas'yev, V.V., and N.A. Dobryanskaya.  Stochastic Pro-
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72  Popkov, V.I., and S.I. Ryabaya.  Distribution of Current of
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73  Apukhtina,  Ye.G., L.S. Sviridova,  and V.V. Danilin.
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74  Apukhtina,  Ye.G.  Some Peculiarities of Corona Dis-
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75  Lyapin, A.G.  Ionic Mobility of  Hydrogen at Higher Pressure
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76  Faynshteyn, E.G.  Application of a Method of Linear Pro-
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77  Vereshchagin, I.P., I.V. Zargaryan, and A.V. Semenov.
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                              41

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 78   Tolmachev, S.T.  Calculation of Potential  in  a Rectangular
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 79   Klenov, G.E.  The Potential of Electrostatic  Fields  at
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 80   Yakunin, E.N.  Electric Field of  a Spherical  Electrode
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 81   Netushil, A.V.  Model of an Electric Field in a  Hetero-
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 82   lossel1, Yu.Ya.  Electrostatic Field and Volume  of Con-
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 83   Kolechitskiy, E.S.  Calculation of Electrostatic Fields  by
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 84   Lachasvili, R.A.  Calculation of  Electrostatic Field
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 85   Mayergoyz, I.D.  Calculation of the Electrostatic Field  by
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 86   Tolmachev, S.T.  Potential Field  in a Periodic System of
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 87   Kolechitskiy, Ye.S., and N.A. Melikov. Calculation of the
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 88   Levintov, S.D., and V.I. Stasyak.  Plane Parallel Field  of
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 89   Knyaz1, A.N.  Method of Calculating Meridian  Plane Fields
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 90   Grach, I.M.  Relation Between Plane-Meridian  and Plane-
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91  Chatskis, L.G, Study of Static (Electric)  Fields.   Elektri-
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                              42

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 93  Peskov, V.D.   lonization Instability  in Corona Discharge
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 94  Mirzabekyan, G.Z.   Aerosol Charging in a Corona-Discharge
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 96  Mirzabekyan, G.Z.   Charging of a Conducting Spherical
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 97  Yermilov, I.V.  Distribution of the Concentration of Dust
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 98  Tsaturyan, A.I.   On the Limit Concentrations of the
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100  Podol'ski, A.A.,  V.I.  Turubarov, and  Ye.I. Pominov.
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101  Bershev, E.N., and  V.V. Kirillov.  Statistical Study of
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102  Vereshchagin,  I.P., and V.S. Morozov.  Movement of Aerosol
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                               43

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103  Mirzabekyan, G.Z.  Kinetics of Coagulation of Bipolarly
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104  Kontush, S.M., and V.M. Romanenko.  Charge Redistribution
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105  Vereshchagin, I.P., V.S. Morozov, and M.M. Pashin.
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106  Volkov, V.N., and I.A. Krylov.  Coalescence and
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107  Salimov, A.U., M.T. Balabekov, A.M. Bagdasarov, D.G.
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108  Burayev, T.K., and I.P. Vereshchagin.  Dynamics of
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109  Salimov, A.U., M.T. Balabekov, Sh.M. Urazbayev, and A.I.
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110  Salimov, A.U., M.T. Balabekov, D.G. Mambetov, M.M. Akbarov,
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112  Karapetyan, M.A.  Dielectric Constant of Dispersed Systems
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113  Karachevtsev, G.V., and A.A. Fridman.  Calculation of
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                              44

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114  Gus'yev, V.A., V.I. Rumyantsev,  and V.I.  Turubarov.   The
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115  Kovalenko, V.G., and B.V.  Polenov.  Electrostatic Analyzer
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116  Kornyushkin, Y.D.  Plane Condenser as Charged Particle
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117  Shuster, K.Sh.  Process for Removing  Aerosol Particles
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118  Mirzabekyan, G.Z., and I.N. Grigor'yev.   Efficiency
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119  Vereshchagin, I.P., V.A. Zhukov,  and  V.S. Morozov.
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120  Dunskiy, V.F., and K.A. Krishtof.  Deposition of Unipolarly
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121  Dunskiy, V.F., and K.A. Krishtof.  Precipitation of Uni-
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122  Yermilov, I.V.  Efficiency  Evaluation of  Fly Ash Electro-
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123  Plotinskiy, I.Sh.  Analysis of a Formula  for Electrostatic
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124  Mirzabekyan, G.Z.  The Effect of  Turbulence  on the
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125  Inyushkin, N.V., and Ya.D.  Averbukh.  On  the Question
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                               45

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 126   Stefanenko, V.T., L.I. Chadova, N.V. Inyushin, and
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 127   Avdeyenko, A.M., A.M. Shteynberg. S.I. Kuritsyn, V.V.
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 128   Berkutov,  A.M., Ye.N. Yegorov, and G.Z. Mirzabekyan.
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 129   Kizim, I.A.,  and I.K. Reshidov.  Apparatus for Measuring
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 130   Kizim, I.A.,  and I.K. Reshidov.  Instrument for Measure-
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 131   Andrianov, Ye.I., and S.S. Yankovskiy.  Measurement of
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 132   Yankovskiy, S.S., G.M. Aliyev, A.A. Rusanov, and Ye.I.
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 133  Aliyev, G.M., and A.Y. Gonik.  Tsiklonom-1 Instrument
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134  Aliyev, G.M., A.Ye. Gonik, Yu.S. Milovidov, and
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                              46

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135  Mirzabekyan, G.Z., and V.M. Rudenko.  Determination
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136  Verem'yev, K.A., and V.F. Danilin.  The Effect of Reverse
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137  Mel'nichenko, N.P., and O.K. Lopatin.  Effect of the
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138  Terebenin, A.M., A.P. Bykov, V.P. Savrayev, and M.F.
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139  Bogatyrev, M.F.  Effect of the  Electrical Conductivity of
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140  Danchev, P., and G.M. Gordon.   Bulgarian Copper Foundry-
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141  Safonov, V.N., V.A. Limanskiy,  V.P. Klyushkin, E.G. Levkov,
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142  Shebzukhov, D.A., A.A. Bogdasarov, and A.S. Serebryakov.
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143  Dering, I.S., V.A. Dubrovskiy,  and E.P. Dik.  Sintering
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                               47

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144  Tager, S.A., J. Maarend, H. Arro, and A. A. Kniga.
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145  Vdovenko, M.I., and A.Ya. Bayakhunov.  Predicting the
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146  Popov, A.G.  Abrasiveness of Ash From Ekibastuz  Coal.
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147  Khar 'kovskiy, M.S., L.I. Kropp, and S.G. Ushakov.
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148  Bratchikov, V.N.  Effect of the Characteristics  of Ash
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149  Zimon, A.D., and E.A. Ronginskiy.  Distribution  of Ad-
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150  Reznyakov, A.B., S.V. Bukhman, M.I. Vdovenko, M.I.
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151  Zalkind, I.Ya., Ye. P. Dik, V.S. Vdovchenko, N.G.
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152  Panteleyev, V.G.  Some Physico-Mechanical Characteristics
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153  Krzhizhanovskiy, R.E., V.L. Mousesyan, and I.I.
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154  Sharlovskaya, M.S., D.Ye. Krivolutskiy, S.N. Komarova,
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                               48

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155  Dering,  I.S., and V.A.  Dubrovskiy.   Effect  of  the
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156  Litvinov, A.T.  Influence  of  Electric Wind  and Gas Humidi-
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157  Chander, Yu.I., S.Z.  Belinskiy, L.G. Borisovskiy, I.S.
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158  Rychkov, V.P., and L.A. Zhestkov.   Increase in the
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159  Chander, Yu.I., S.Z.  Belinskiy, L.G. Borisovskiy, N.S.
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160  Olesov,  N.A.  Removal of Dust From  Gases in Electrostatic
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161  Levitov, V.I., I.K. Reshidov, and I.A.  Kizim.  Effect of
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162  Kizim,  I.A., and I.K. Reshidov.  Improvement of Electro-
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163  Milovidov, Yu.S., and V.V. Soldatova.   Study of
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164  Yermilov, I.V., and I.K. Reshidov.   New Electric Sets
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165  Bydzhovskiy, Ya., and V. Gusa.  Use of  Thymistors for
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166  Nagornyy, V.V., Z.L. Shvarts, A.I. Mishnev, and A.I.
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167  Kuznetsov, Yu.L., and V.V. Podgayevskiy.  Trials of an
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168  Belkin, Ya.I., and L.P. Yanovskiy.  Protecting High-Voltage
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169  Nagornyy, V.V.  Ways to Increase the Effectiveness of
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170  Sanayev, Yu.I., and I.V. Yermilov.  Experimental Study
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171  Meshcheryakov, V.B., and A.I. Zav'yalov.  Improved
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172  Yanovskiy, L.P., Ye.I. Byalik, and Ya.I. Belkin.  Electro-
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173  Asyutin, A.V.  Increasing the Degree of Gas Cleaning
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174  Zav'yalov, A.I., and V.B. Meshcheryakov.  Studying
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                             50

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175  Sanayev, Yu.I.,  and  I.K.  Reshidov.   Study  of  Dust Re-
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176  Sanayev, Yu.I.   Methods for  Reducing Secondary
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177  Materials  from the Study of  the  Physical Mechanism of
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178  Savrayev,  V.P.,  and  K.Ye.  Savrayeva.   Basic Factors
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179  Zav'yalov, A.I.  Construction  Parameters for  Collection
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180  Stark, S.B., N.I. Kharichev, A.F.  Aptekar', and
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181  Idel'chik, I.Ye., and  V.P. Aleksandrov.  The  Components
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182  Idel'chik, I.Ye., and  V.P. Aleksandrov.  Improving the
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183  Idel'chik, I.Ye., and V.P. Aleksandrov.  Choice of Electro-
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184   Idel'chik, I.Ye., and V.P. Aleksandrov.  Designing Flue
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185   Rikhter, L.A., Yu.G. Kozlov, O.N. Il'inskaya, and
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186   Yanovskiy, L.P., N.G. Zalogin, and L.I. Kropp.  Process
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187   Morozov, Yu.G., and A.F. Rudenko.  Electrostatic
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188   Rikhter, L.A., and O.N. Il'inskaya.  Gas Distribution  in
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189   Salov,  Yu.V., V.V. Smirnov, G-V. Bulavkiy, and V.K.
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190   Linger, I.N., and S.I. Korneyev.  Improving the Efficiency
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191   Kazakov, V.N.  Testing an Electrostatic Filter With Trans-
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192   Idel'chik, I.Ye., and V.P. Aleksandrov.  The Effect of  Non-
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193  Mirzabekyan, G.Z.  Effect of Turbulence of  the Flow on
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194  Mirzabekyan, G.Z., and I. Grigor'yev.  Equations for  Kinetic
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195  Padva, Y.Yu.  The Distribution of Aerosol Concentrations in
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196  Korotov, Ye.I.  Determination of Added Air  in Dust System.
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197  Zalogin, N.G., and R.G.  Kit.  Problems of Developing Com-
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198  Vishnevskiy, T.S., and V.M. Kovetskiy.  Optimal System for
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199  Kit, R.G., and N.G. Zalogin.  Ways  to Improve the
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200  Lozhkov, E.F.  The Most  Advantageous Operational Modes of
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201  Chekanov, G.S.  Removing Ash From the Bins of Ash
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202  Kuts, A.R.  Mechanisms of Dust Removal.  Energetik
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203  Krayzel1, S.E., and I.V. Raspopov.  Removal of Ash With an
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204  Ots, A.A., Tallermo, Kh.I. and Tomann, E.L.  Influence of
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205  Rastorguyev, V.P., and L.S. Ryzhov.  Electrostatic
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206  Lozinskiy, R.P.  Tests of Ash-Collecting Devices at
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207  Akbrut, A.I.  The Organization of the Assembly and Repair
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208  Kolosov, B.A.  Industrial Utilization of Ash From Thermal
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209  Vdovchenko, V.S., I.Ya. Zalkind, V.F. Mirachev, D.G.
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210  Inyushkin, N.V., N.I. Polyakova, and M.M. Yakovenko.
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211  Tarat, E.Ya., A.I. Volkind, Yu.A. Pushkin, and V.K.
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212  Tarat, E.Ya., A.P. Meder, V.M. Popov, and A.I. Volkind.
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213  Apukhtina, Ye.G., V.V. Bordacheva, A.Yu. Val'dberg,
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214  Val'dberg, A.Yu., I.L. Mostinskiy, and R.S. Nekhoroshev.
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215  Vereshchagin, P.P., and  I.M.  Vorob'yev.   Process  for
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216  Gupalo, I.P., v.S. Burkat, and Yu.G.  Fialkov.  Promising
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217  Kubyshev, N.N., N.S.  Krotov,  and R.V. Meysner.  Production
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218  Andruyeyenko, Ye.N.,  N.A. Borisenko,  A.F.  Golovan1,
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219  Gordon, G.M.  Basic Trends in Research  by Gintsvetmet
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220  Shebzukhov, D.A.  Calculation of Efficiency of Electro-
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221  Shebzukhov, D.A., V.F. Denisov,  T.N. Klendrov, and B.S.
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222  Belousova, A.E.,  L.I. Mekler, A.A. Egizarov,  and  E.A.
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223  Bogatyrev, M.F.,  and  A.V. Tonkonogiy.   Purification of
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224  Bogatyrev, M.F.   Removal of Solid  Suspended Matter From
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225  Lyabakhov, T.Ya.  Gas Cleaning by  Electrostatic Precipita-
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 226  Rublinskii, L.B., V.N. Kazakov, and A.A. Shtang.
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 227  Goncharov, A.Ye., and M.V. Fedotov.  Intensified  Process
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 228  Yur'yev, N.V., V.D. Noskov, E.V. Komarov, and  I.P.
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 231  Rozenshtrakh, M.B.  Main Directions for Planning  the
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 232  Gubert, S.V.  Development  of the Iron and Steel Industry
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 234  Sazanov, B.V.  Discussion  on the Prospects for Using
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 235  Morozov, A.N., Trends in Electric Furnace Steelmaking
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 236  Apukhtina, Ye.G-, V.V. Danilin, V.M. Tkachenko, V.S.
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237  Khomutinnikov, P.S., and I.I. Shipulin.  Electrostatic
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                              56

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238  Apukhtina, Ye-G., and V.V. Danilin.  Electrical Cleaning
     of Gases from Martin Open-Hearth Furnaces  in Which Oxygen
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239  Belinskiy, S.Z., V.S. Simkin, and V.V. Martyrenko.
     Purification of Gases From Open-Hearth Furnaces Using
     Mazut in GPDS Electrostatic Precipitators  in the
     Sarkanais Metallurgical Plant.  Sb. Nauch. Tr., Vses.
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240  Teplitskiy, M.G., and G.I. Guzhov.  Cleaning of Gases
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241  Belinskiy, S.Z., V.S. Gur'yev, and V.S. Simkin.  Selec-
     tion of a Rational System of Gas Purification After
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242  Pazin, L.M., and L.M. Meitin.  Use of Electrostatic
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243  Mityushkin, V.G., and V.I. Var'yev.  Reconstruction of
     Electrostatic Precipitators for Cleaning Coke Oven Gas.
     Koks Khim. 1972(4);38-39.  APTIC No. 45658.

244  Smola, V.I., D.I. Isayev, V.D. Nagibin, Yu.K. Pobedonostsev,
     and V.A. Zinkovskiy.  Cleaning of Converter Gases Used for
     Sulfuric Acid Production.  Tsvetn. Metall. 1972(3);6-8.
     APTIC No. 57262.

245  Apakhov, I.A., N.V. Inyushkin, E.A. Kravchenko, L.I.
     Bulycheva, G.F. Shakhov, A.Ye. Goncharov,  A.N. Semenov,
     and G.A. Usov-  Scrubbing of Sulfuric Acid Mist With
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     Khim. Prom. 197_2 (9) :676-678. APTIC No. 47348.

246  Aliyev, G.M.A., A.Ye. Gonik, N.F. Bugayev, and L.M. Meytin.
     Methods of Increasing the Workload of Electrostatic
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     Ogneupory 1967(9) .-11-18.  APTIC No. 13754.
                               57

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247  Aliyev, G.M.A., A.Ye. Gonik, and V.P. Bugayev.  PGDS
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248  Reznikov, Yu.N., O.P. Ostrovskiy, Yu.I. Tseluiko,
     L.N. Gulaga, and L.G. Chalyi.  Dust-Gas Discharge
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249  Aliyev, G.M.A., and V.F. Sarafanov.  Efficiency of
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250  Lyakhova, R.N., V.I. Ktitorov, M.N.  Balamut, and L.P.
     Gilyazetdinov.  Electrostatic Precipitation  of
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251  Val'dberg, A.Yu., L.L. Nabutovskaya, and G.M. Aliyev.
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     Khim. Prom. 4j3(4) :258-260, 1972.  Chem.
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252  Lagutin, Yu.V., and V.V. Shul'ga.  Some Experiences
     with Electrostatic Precipitators.  Tsement 14.(7) :16-17,
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253  Belinskiy, S.Z., Yu.I. Chander, V.A. Konovalova, and
     Z.G. Palamarchuk.  Application of Electric Filters
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254  Chander, Yu.I., S.Z. Belinskiy, and  L.G. Borisovskiy.
     Cleaning of Gases Emitted by Rotary  Clay Baking Kilns.
     Ogneupory 1972(9);38-41.  APTIC No.  47865.

255  Alekseyev, N.I., V.p. Luk'yanov, V.P. Klyushkin, and
     M.A. Dybskaya.  Reconstruction of a  Gas Purification
     System of Electrode Production Kilns.  Tsvetn. Metall.
     1973(9) ;43-44.  Chem. Abstr. 8CI, 87016.

256  Rychkov, V.P., Yu.I. Firstov, R.G- Sabirov,  and  T.I.
     Belotserkovets.  Gas Purification in Dolomite  Burning.
     Refractories 13(5-6):357-359, 1972.
                            58

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257  Khar'kovskiy, M.S.,  and  L.I.  Kropp.   Wet Ash Collectors
     at the Electric  Power  Stations  of the USSR.   Presented
     at the Joint Soviet-American  Symposium on Methods  to
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258  Dergachev,  N.F.,  L.I.  Kropp,  M.S.  Khar'kovskiy,  Yu.A.
     Loshkarev,  B.C.  Feshchenko, V.A.  Zorin,  and  O.M.
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     Oxide in  the Ash.  Energetik  1973(10):11-12.  Chem.
     Abstr. 8ID,  87031.

259  Dergachev,  N.F.,  L.I.  Kropp,  and  M.S.  Khar'kov.  Scrubbing
     Gases in  Wet Ash Collectors.   Report to  the  Joint  Soviet-
     American  Working Group on Designing  and  Operating  Systems
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     of Thermoelectric Generating  Stations.  Ministry of
     Power and Electrification, Moscow 1975.

260  Ushakov,  S.G., M.S.  Khar'kovskiy,  N.F. Dergachev,  and
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261  Yurinskiy,  S.V.,  and V.I.  Trubochkina.  Assemblage
     of Fly Ash  Collectors  with Venturi Tubes in  Operating
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262  Palatnik, I.E.,  and B.Ye.  Lavrov.  Some  Results  of the
     Intensification  of  Ash Collection in Wet Apparatuses
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263  Dergachev,  N.F.,  et al.   Modernization of Wet Fly  Ash
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264  Yalamov,  Yu.I.,  Ye.  R. Shchukin,  and B.V.  Deryagin.
     Theory of Diffusiophoresis of Small  Volatile  Aerosol
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265  Yalamov,  Yu.I.,  and  B.A.  Obukhov.  Diffusophoresis of Large
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     42.(5) .-1604-1608,  1972.   APTIC No.  54824.

266  Yalamov,  Yu.I.,  V.M. Aladzhyan, V.S.  Galoyan, and  B.V.
     Geryagin.   Diffusiophoresis  of Volatile Aerosol
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     206^(2) :316-318,  1972.  APTIC  No.  46431.


                                59

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 267  Belov, A.P.  Stefan Flow During Vaporization of  a
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 268  Fedoseyev, V.A., A.G. Konyushenko, V.Ye. Glushkov,  and
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 269  Ivchenko, I.N. Yu.I. Yalamov, and Ya.I. Rabinovich.
     Theoretical and Experimental Study of  the Thermophoresis
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     Fiz.  Khim. j45(3) :320-322f  1971.  APTIC No.  33357.

 270  Yalamov, Yu.I., B.V. Deryagin, and V.S. Galoyan.  Theory
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 271  Yalamov, Yu.I., and A.S. Sanasaryan.   Thermophoresis  of
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     48(12) .-3059-3062, 1974.  Chem. Abstr.  £2, 90183.

 272  Yalamov, Yu.I., V.M. Aladzhyan,  and V.S. Galoyan.
     Theory of the Capture of Volatile Aerosol Particles
     by Growing or Evaporating  Drops.  Zh.  Fiz. Khim.
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 273  Yalamov, Yu.I., A.A. Yushkanov,  and O.A. Bersegyan.
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 274  Yalamov, Yu.I., and E.R. Shchukin.  Theory of  Thermophoresis
     and Diffusiophoresis of Small Volatile Aerosol Particles.
     Zh. Tekhn. Fiz. 4£(2):447, 1974.

 275  Deryagin, B.V., Research on Aerosol Dynamics.   Vestn.
     Akad. Nauk SSSR 1973(7);38-44.   APTIC  No. 54595.

 276  Terebenin, A.N., and A.P.  Bykov.  Aerosol Sedimentation
     Mechanisms Occuring in Water Vapor Diffusion Fields.
     Zh. Prikl. Khim. _45_{5) : 1012-1015, 1972.  APTIC No.  45713.

277  Kutukov, V.B., Ye.R. Shchukin, and Yu.I. Yalamov.
     Photophoretic Movement of  Large  Aerosol Particles in
     the Field of Optical Illumination.  Zh. Tekhn. Fiz.
     46(3):626-627, 1976.
                               60

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278  Yalamov, Yu.I., M.N.  Gaidukov,  and Ye.R.  Shchukin.
     Theory of Thermo-  and Diffusiophoresis of Moderately
     Large and Large Volatile  Aerosol  Particles.   Zh.  Fiz.
     Khim. 49(2) :505-507,  1975.   Chem.  Abstr.  83^,  16036.

279  Yalamov, Yu.I., and A.S.  Sanasaryan.   The Motion  of  Large
     Drops, Solid  Particles, and  Gas Bubbles in Gases  With
     Non-Uniformity of  Temperature and  Liquids Under Slippage
     Conditions.   Zh. Tekhn. Fiz.  4J5(10) :2152-2158,  1975-

280  Shchukin, Ye.R., M.N.  Gaidukov, and Yu.I.  Yalamov.
     Theory of Thermo-Diffusiophoresis  of  Moderately
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     «, 137265.

281  Sutugin, A.G., A.Ya.  Simonov, and  E.I.  Kottsev.   The
     Nature of the Dependence  of  the Coefficient of Condensation
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282  Berezhnoy, V.M.  On  the Deposition of Matter on Spherical
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283  Bazhal, I.G., E.P. Dzyubenko, and  O.D.  Kurilenko.
     Mechanism of  Recondensation  in  Aerosols During Periodic
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284  Barsegyan, O.A., and  Yu.I. Yalamov.   Solid Aerosol Particle
     Movements in  Relation to  Growing or Evaporating Drops.
     Zh. Tekhn. Fiz. 44_(11) :2410,  1974.

285  Lipatov, G.N., and S.A. Kontush.   Trajectory of a Large
     Volatile Aerosol Particle  in  a  Planar  Vertical Slotted
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     Chem. Abstr.  8.3, 134258.

286  Litvinov, A.T.  Fine  Cleaning From a  Gas  by Removing
     Highly Dispersed Hydrophobic  Particles  Using the
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287  Litvinov, A.T.  Enhanced Efficiency of  Catching the
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     1965;7p.  APTIC No. 57113.
                             61

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 288  Val'dberg, A.Yu., and M.M, Zaitsev.  The Condensation
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 289  Increasing the Efficiency of Wet Particulate Removal
     with  the Use of  the Condensation Effect.  U.S./USSR
     Working Group on Stationary Source Air Pollution
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 290  Litvinov,  A.T.   Efficiency of Collecting Hydrophilic
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 291  Dneprovskiy, V.G., B.A. Osadin,  and N.V. Rusakov.  Con-
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 292  Stepanov,  A.S.   The Kinetic Equation of Particle Diffusive
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 293  Dovgalyuk, Yu.A.  Computation of Particle Growth  in Pre-
     cipitation in a  Developing Convection Cloud.  Tr.  Gl.
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 294  Aleksandrov, E.L., L.M. Levin, and Yu.S. Sedunov.  On
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 295  Sutugin, A.G.  Coagulation Constants of Aerosols  at
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     (USSR)  £9(6):633-634, 1967.  APTIC No. 36320.

 296  Sutugin, A.G.  Effect of Nonlagging Molecular Forces on  the
     Coagulation and  Condensation Growth of Particles  of Highly
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     1971.   APTIC No. 45390.

 297  Tarat,  E.Ya., and A.I. Volkind.  Increasing the Efficiency
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298  Belov, G.G., L.S. Vasilevskiy, and N.V. Krasnogorskaya.
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                             62

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299  Belen'kiy, V.A., V.A. Kosyak,  and  V.I.  Podlesnyy.
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300  Berlin, B.M., and Bunin, L.V.   Sovremennye  Skrubbery i
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     7_8, 33516.                         	

301  Lebedyuk, G.K.  The Basis of Expediency in  the Appli-
     cation of Wet Methods for Cleaning Gases  of Dust and
     the Choice of Equipment for  Accomplishing  it.  Sb.
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302  Tsennik na Montazh Oborudovaniya,  No. 15, Oborudovaniye
     dlya Ochistki Gazov.  [Price  List for Installation of
     Equipment No. 15.  Equipment for Cleaning Gases.]
     Publishing House of Literature for Construction, Moscow,
     1971:1-17.

303  Val'dberg, A.Yu., E.Ya. Tarat,  and L.L. Nabutovskaya.
     Pressure Drop Across Sieve Grids of Sieve-Plate
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304  Tarat, E.Ya., and A.Yu. Val'dberg.  Selection of Pressure-
     Drop Factors for the Grids of  Froth Equipment.  Zh.
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305  Kostin, V.M., and K.N. Shabalin.   Characteristics of
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306  Val'dberg, A.Yu., and E.Ya.  Tarat.  Critical Parameters of
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     of Liquid Through the Grid Openings.  Zh. Prikl. Khim.
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307  Tarat, E.Ya., A.Yu. Val'dberg,  and M.M. Zaitsev.  Design
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                               63

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 308  Tarat, E.Ya., and O.S. Kovalev.  Hydrodynamics of a Foam
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     Kratk. Soobshch. Nauchno-Tekh. Konf., Leningr. Tekhnol.
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 309  Tarat, E.Ya., and A.Yu. Val'dberg.  Hydraulic Resistance
     of Grids  Under Foaming Conditions.  Zh. Prikl. Khim.
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 310  Val'dberg, A.Yu., N.I. Gel'perin, and V.M. Tarasov.
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 311  Kostin, V.M.  Hydraulic Resistance of an Irrigated
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 312  Tarat, E.Ya., V.S. Burkat, and V.S. Dudorova.  Hydro-
     dynamics  of Apparatus With Fluidized Reflux  Ball Packing.
     Zh. Prikl. Khim.  £7(1):106, 1974.

 313  Val'dberg, A.Yu., E.Ya. Tarat, and M.M. Zaitsev.  Liquid
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 314  Kotov, N.A.   The Effect of Spray Carried Away on the
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 315  Tarat, E.Ya., V.S. Burkat, and V.S. Dudorova.  Dust
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 316  Val'dberg, A.Yu.  Effect of Energy Losses on the Efficiency
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 317  Akbrut, A.I., and L.I. Kropp.  Determination of  the
     Average Droplet Size for the Design of Ash Catching
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     1972(4);81-83.  APTIC No. 40628.

318  Chulakov, P.Ch., and U.B. Baytasov.  Efficiency  of  Dust-
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                               64

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319  Kropp, L.I., and A.I.  Akbrut.   Working  Processes  and  Cal-
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320  Kunina, E.M., and M.I.  Kheifets.   Time-Lag  Coagulation
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     Chem. Abstr. 19.' 33019.                   	

321  Priyemov, S.I., and V.D.  Platov.   Application  of  Design
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322  Soroka, B.S., A.Ye. Yerinov, L.B.  Legkobyt, and Yu.P.
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323  Gushchin, L.S., and I.Ya. Vinnik.   Jet Sprayer for Venturi
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324  Lavrov, B.E., V.L. Nagradov, I.E.  Palatnik, V.P.  Petrishin,
     and V.A. Chayanov.  Effect  of  the  Extent  of Atomization
     of Water on  the Action of Wet  Fly  Ash Collectors  With
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325  Kunina, E.M., G.R. Ostanovskiy, V.V. Piotrovskiy, and
     M.M. Cherepinskiy.  Selection  of Optimum  Parameters
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     1973(8);35-36.  Chem.  Abstr. 8£, 40648.

326  Reznichenko, I.G., Yu.P.  Pavlenko,  A.V. Ul'yanov,
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     Pressure Ejection Venturi Tubes.   Prom. Sanit. Ochistka
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327  Torf, A.I.,  and V.F. Maksimov.  Design Calculation of a
     Jet Scrubber for Removing Dust Particles  from Flue
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328  Kunina, E.M., and M.I. Kheifets.   On the  Problem  of the
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                           65

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 329  Lebedyuk, G.K., V.N. Alimov, and Yu.V. Kovalevskiy.
     Industrial Use of Gas-Liquid Contactors With Self-
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     1972.  Chem. Abstr. 7J3, 138255.

 330  Kanenko, G.M., and B.P. Slavutskiy.  Hydraulic Resis-
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 331  Litvinov, A.T., and R.A. Burtseva.  Calculation of  the
     Optimal Sizes of Injectors, Specific Density of Flooding,
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 332  Maksimov, G.V., and L.M. Isyanov.  Effect of the  Extent
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 333  Tkachuk, A.Ya., and L.I. Yeshchenko.  Intensification of
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 334  Nedoborov, Yu.P., L.A. Degtyareva, and B.V. Nekrosov.
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 335  Lagunov, A.S., L.P. Baivel, B.A. Gusev, V.K. Litvinov,
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 336  Lavrov, B.E., and I.E. Palatnik.  Experimental Study of
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337  Beskin, L.Z., V.V. Strel'tsov, and V.Ya.  Demshin.
     Hydraulic Resistance of an Absorber with  a Hydro-
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                             66

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338  Lagunov, A.S., and V.V. Ushakov.   The  Optimum Working
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339  Dubinskaya, F.Ye., and A.Ya. Val'dberg.   Choosing Apparatus
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     1974(9);13-14.  Ref.  Zh.  Khim.  1975, 21686.

340  Val'dberg, A.Yu., L.L. Nabutovskaya, and  E.Ya. Tarat.
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341  Yermolayev, V.N.  Study of  the  Heat Exchange Process Occur-
     ring Under High Pressure  Conditions in Scrubbers.  Stal1
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342  Dergachev, N.F., and  M.S. Khar'kovskiy.   Prevention of
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343  Lebedev, V.D., V.E. Maslov, and K.A. Lunegov.  Gas Puri-
     fication in Centrifugal Scrubbers.  Teploenergetika
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344  Novikov, A.I., A.N. Skvortsov,  and V.A. Kishkarev.
     Conical Scrubbers With Fluidized Bed Spherical
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     1974(11) ;846-849.  Chem.  Abstr. 8_2, 60847.  APTIC
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345  Chekov, A.V., K.I. Korotyuk, I.P.  Sklvarov, A.T.
     Tikhonovich, and M.N. Aleshin.  Apparatus for the
     Wet Purification of Gas.  USSR  Patent  345,937, 1972.
     Chem. Abstr. 77., 166597.

346  Priyemov, S.I., and A.Ya. Tkachuk.  Statistical Method
     of Describing Dust Collection in a Wet Dust Collector
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     1975.  Chem. Abstr. 83, 81959.

347  Gertseva, M.I., and N.S.  Kirsanova.  Effect of Factors
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                             67

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348  Alekseyev, N.I., E.Ya. Tarat, and V.N. Isayev.  Foam
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     1976, 51783.

349  Lebedyuk, G.K.  Use of Venturi Scrubbers for Removal of
     Highly Dispersed Particulates.  Proc. Symp. Control
     Fine-Particulate Emissions Industrial Sources, San
     Francisco, 1974;213-220.  EPA 600/2-74-008, PB 235829/9WP.

350  Mitropol'skaya, N.B., N.A. Nikolayev, and V.A. Bulkin.
     High-Capacity Absorber for the Complex Cleaning of Gases.
     Khim. Khim. Tekhnol. 17(1):151-153, 1974.

351  Dormostuchenko, G.M.  Determination of Statistical Charac-
     teristics of Movement of a Suspended Particle on the
     Basis of Statistical Characteristics of Flow.  Meteorol.
     Klimatol. Gidrol. 1969(4);39-48.  APTIC No. 33541.

352  Lebedyuk, G.K., A.Yu. Val'dberg, and F.Ye. Dubinskaya.
     Wet Gas Cleaning in Iron and Steel Industry.  Proc.
     Symp. Control Fine-Particulate Emissions Industrial
     Sources, San Francisco, 1974 -.221-238.  EPA 600/2-74-008,
     PB 235829/9WP.

353  Korotyuk, K.I.  Cupola Furnace Provided With Dust Catching
     and CO Afterburning Equipment.  Liteinoe Proizvod.
     1973(2);40.  APTIC No. 50112.

354  Teplitskiy, M.G., I.z. Gordon, G.A. Aleinikov, N.A.
     Kudryavaya, and A.N. Pyatigorskiy.  Trapping Dust From a
     Double-Bath Open-Hearth Furnace.  Stal1 1968(8);756-760.
     Chem. Abstr. 6_9, 88971.

355  Yasinskiy, A.N., R.S. Supruneko, L.A. Volkova, and 1.0.
     Shabliyenko.  High-Temperature Gas Scrubbing From
     Open-Hearth Furnaces.  Metallurg 1971(8):21-23.  APTIC
     No. 38807.

356  Kunina, Ye.M., G.R. Ostanovskiy, V.V. Piotrovskiy, and
     M.M.  Cherepinskiy.  Selection of Optimum Parameters
     of Venturi Tubes During the Designing and Adjustment
     of Open-Hearth and Converter Gas Scrubbers.  Metallurg
     1973(8) ;35-36.  Chem. Abstr. 8CI, 40648.

357  Sperkach, I.Ye., F.A. Gints, V.M. Pomazuyev, M.S.
     Mironchik, R.K. Veletskiy, Ye.L. Mandel'broit,
     D-G.  Mil'grom, and Ye.A. Semenenko.  Application
     of Centralized Gas Cleaning Systems on Open-Hearth
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     Sb.  1975(4):26-28.  Ref. Zh. Khim. 1975,  231705.
                              68

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358  Erokhin,  A.V.,  V.D.  Osipenko,  and Yu.  S.  Boika.   Wet
     Cleaning  of  Stack  Gases of the Open Hearth Furnace.
     Metallurgist 1T_(7-8) :527-529,  1974.

359  Blotskiy,  S.N.,  V.M.  Pomazuyev, Ye.S.  Golikov, A.S. Galkin,
     and V.G.  Pidorchenko.   Experience in the  Use of  Gas-Cleaning
     Facilities on Electric Furnaces.   Stal1 1971(1):88-91.
     APTIC No.  42190.                        	

360  Dobrayakov,  G.G.,  M.Z. Serebryakov,  and V.P.  Rychkov.
     Operation of a  Gas-Cleaning System on  a Closed-Top Electric
     Furnace.   Steel U.S.S.R.  1(5):401-402, 1971.  APTIC
     No. 37324.

361  Kutuzov,  G.O.,  and A.Yu.  Val'dberg.  Purification of Gases
     From Carbon  Ferrochromium Melting.   Prom.  Sanit. Ochistka
     Gazov, Ref.  Sb.  1972(4):29-31.  Chem.  Abstr.  79,
     82918.                                        —

362  Levin, G.M.,  G.S.  Pantelyat, M.A.  Kutsyshin,  R.B. Goncharova,
     and T.M.  Bublay.   Water Supply for  Electric  Steel Melting
     Furnace-Emitted Gas  Scrubbers.  Stal'  1972(9):866-868.
     APTIC No.  47821.

363  Val'dberg. A.Yu.,  and  V.A.  Larin.  Comparative Studies of
     Two Systems  for  the  Scrubbing  of  Waste Gas From  a Closed
     Ferroalloy Furnace.   Stal1  1970(10):957-959.  Chem. Abstr.
     74, 24620.

364  Rychkov,  V.P.,  L.A.  Zhestkov,  and Yu.A. Suvorkov.
     Studying  and Improving the  Purification of Gas From
     a Ferrous  Alloy Electric  Furnace.  Prom. Energ.
     1974(12) ;25-26.  Chem.  Abstr.  83_,  32445.

365  Masterovoy,  E.I.,  V.I.  Zabramnyy,  and A.Y. Orlov.
     Detoxification  of  Cyanide-Containing Waste From Gas
     Cleaning  Installations in Ferrochromium Production.
     Stal' 1974(4);378-380.  APTIC  No.  71872.

366  Sperkach,  I.Ya., F.A.  Gints, T.I.  Belotserkovets, V.N.
     Frolov.   Efficient Sprinkling  System in Scrubbers With
     Small Venturi Tubes.   Ochistka  Vod. Vozdush.  Basseinov
     Predpr. Chern. Metall.  1972:78-83.  Chem. Abstr. 8£, 40654.

367  Vysotskiy, Ye.A.,  S.V.  Yegorov, V.A. Borger,  P.I.
     Kovalishin,  A.I. Motin, and V.D.  Fot.  Method of
     Automatic  Regulation of the Process of Wet Purifi-
     cation of  Gases.   USSR Patent  428,764, 1974.
     Ref. Zh. Khim.  1975, 141657.
                              69

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 368  Dubinskaya, F.E., M.M. Zaitsev, and I.S. Zhigalina.
     Cleaning of Gases From Oxygen-Blown Converters.
     Stal1 1966(6) ;570-571.  Chem. Abstr. 6>5, 8435.

 369  Sperkach, I.E., M.S. Shneiderman, and M.A. Yartsev.
     Gas-Cleaning  Installation for the Oxygen-Converter
     of Chelyabinsk Works.  Steel U.S.S.R. 2(12)-.968-910,
     1972.

 370  Vinokurov, I.S., S.T. Zolotukhin, G.R. Ostanovskiy, E.I.
     Olkhovskaya,  A.Z. Ryzhavskiy, L.N. Raitman, and Yu.M.
     Yudovich.  Technical-Economic Comparison of Dry and Wet
     Gas Cleaners  for Converters Working With Complete
     Combustion of Carbon Monoxide.  Stal1 1970(11) -.925-926.
     APTIC No. 29185.

 371  Tsar'kov, V.V., and V.A. Kuzmenkov.  Dust Removal From
     Flue Gases in Ore Dressing Plants. Metalluirg  1974 (12) :37-39.
     APTIC No. 71641.

 372  Galkin, A., D. Filimontsev, B. Zimenlso, D. Bratchikov,
     and A. Kas'yanov.  Wet Cleaning of Gases From a Large
     Sintering Machine.  Stal1 1975(8) -.211-219.

 373  Kormyshev, V., S. Belokon1, I. Ravikovich, and E.
     Britvin.  Selective Cleaning of Waste Gases Under the
     Conditions of the Sinter Plant of the Kamysh-Burun
     Iron-Ore Combine.  Stal1 1974(8) -.765-767.

 374  Yermolaev, V.N.  High-Pressure Heat Transfer  in a Scrubber.
     Stal' 1972(8) -.169-111.  Chem. Abstr. 78, 45597.

 375  Val'dberg, A.Yu., N.I. Gel'perin, and V.M. Tarasov.
     Removal of Dust From Gases From Aluminum Electrolyzers.
     Khim. Neft. Mashinostr. 1972(2);10-11.

 376  Anikeyev, V.A., V.M. Tarasov, E.G. Levkov, and V.P. Klyuskin.
     Trapping of Hydrogen Fluoride From Aluminum Electrolysis
     Cell Gases in a Hydrodynamic Gas  Purifier.  Prom. Sanit.
     Ochistka Gazov, Ref. Sb. 1972(3);27-29.  Chem. Abstr.
     19_, 9348.

377  Zhulin,  N.V., and A.A. Komlev.  Improvement of the  Process
     and Regime of Gas Scrubbing and the Design of Gas Scrubbers
     in the Aluminum Industry.  Nov. Teor. Tekhnol. Metall.
     Protsessov 1973:27-29.  Chem. Abstr. £1, 140380.

378  Prikhod'ko, V.P.  Grating-Type Separators Used for  the
     Purification of Gases in Scrubbers in Aluminum Electrolysis
     Plants.   Prom. Sanit. Ochistka Gazov, Nauch.-Tekh.  Sb.
     1972(6):11-14.  Chem. Abstr. 80,  136919.
                             70

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379  Prikhod'ko, V.P., N.A. Sidorenko, V.S. Mal'ts, U.P.
     Gromov, and E.A. Tsetsarenko.   Improvement  in the
     Vertical Louvered Separators  in Scrubbers for Cleaning
     Aluminum Production Gases.  Tsvetn. Metall. 1974(12):29-31.
     Chem. Abstr. 82, 128834.                    	

380  Zhulin, H.V., and A.A. Komlev.  Utilization of Flocculating
     Means for Particle Sedimentation From Gas Cleaning Solutions.
     Tsvetn. Metal.  1971(8);36-37.   APTIC No. 35328.

381  Margolin, E.V., V.S.  Burkat,  V.P. Klyushkin, and M.L.
     Cherkasskiy.  Determination of  Drop Entrainment From
     Gas Scrubbers in the  Aluminum Industry.  Tr. Vses.
     Nauch.-Issled.  Proyekt.  Inst. Alyum., Magn. Elektrod.
     Prom.  1970(71);168-176.  Chem. Abstr. 7£,  142755.

382  Burkat, V.S., E.Ya. Tarat, and  V.S. Dudorova.
     Removal of Hydrogen Fluoride  and Dust from Aluminum
     Production Gases in a Scrubber  with a Suspended Spherical
     Packing.  Tr. Vses. Nauch-Issled. Proyekt.  Inst. Alyum.,
     Magn. Elektrod. Prom.  1971(78);124-133.  Chem. Abstr.
     ^9, 69850.

383  Gelperin, N.I., and V.M.  Tarasov.  Equipment for Cleaning
     of Aluminum Electrolysis  Shop-Emitted Gases: Efficiency
     and Intensity of Operation.   Zh. Prikl. Khim. 45(1);70-75,
     1972.  APTIC No. 40414.

384  Failkov, Yu.G., M.L.  Cherkasskiy, V.S. Malts, and B.P.
     Gromov.  Industrial High-Speed  Hollow Scrubber
     for Aluminum Manufacturing-Generated Gas Cleaning.  Tsvetn.
     Metall. 1971(12);28-31.   APTIC  No. 38874.

385  Burkat, V.S., E.Ya. Tarat, V.A. Bayevskiy,  Ye.M. Voronin,
     and M.T. Tsurenko.  Purification of Aluminum-Industry
     Gases in a Hollow High-Speed  Scrubber.  Soviet J.
     Non-Ferrous Metals 10(9):61-68, 1969.  APTIC No.
     37544.

386  Zhulin, N.V., A.A. Komlev, and  I.K. Skobeyev.  Use of
     Surface-Active  Agents for Wet Purification  of Gases
     From Aluminum Electrolyzers.  Tsvetn. Metall. 1974(11);37-38.
     Ref. Zh. Khim.  1975,  61609.

387  Amelin, A.G., Ye.V. Yashke, B.T. Vasilev, and R.P.
     Karpova.  Evaporation Conditions During the Scrubbing
     of Kiln Gases in the  Process  of Contact Sulfuric Acid
     Production.  Khim. Prom.  1973_(6) :435-438.   APTIC No.
     53773.
                                71

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388  Vetlugina, N.A., I-G. Blyakher, A.L. Shterenzon,
     and I.Ya. Zhivaykin.  Removal of Sodium Fluoride
     Dust From Gas in a Column With Moving Packing.
     Tsvetn. Metall. 1975(3);40.  Ref. Zh. Khim. 1975, 151702.

389  Terebenin, A.N., and A.P. Bykov.  Trapping Arsenic
     Aerosols in a Venturi Tube.  Soversh. Tekhnol. Proizvod.
     Olova 1972, 55-57.  Chem. Abstr. 81, 158017.

390  Savrayev, V.P., and V.V. Zapasnyy.  Gas Cleaning by
     Impact Action in Scrubbers.  Tsvetn. Metall. 1975(5):29-32,
     Ref. Zh. Khim. 1975, 201589.

391  Agayev, A.S., Ye.B. Nadzhafov, A.G. Nagileva, S.O.
     Arzumanova, and Z.A. Khalilova.  Collection of Catalyst
     Dust From Waste Gases of Roasting Ovens of Catalyst
     Factories.  Tr. Vses. Neft. Nauch.  Issled. Inst. Tekh.
     Bezop. 1971(21);70-72.  APTIC No. 77465.

392  Khanin, I.M., A.F. Sherchenko, V.A. Mizin, E.V. Brodskiy,
     and Z.V. Shevchenko.  Effective Dust Elimination From
     Industrial Gases of the Silicate Industry.  Vop. Khim.
     Khim. Teknol. 1972(26);134-138.  Chem. Abstr. 7^,
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393  Processes and Installations for Dust Collection Through
     Filtration.  NIIOGAZ, Moscow, 1973.

394  Kurkin, V.P.  Bases of  Gas Filtration Through Porous
     Media Theory.  Proc. Symp. Control  Fine-Particulate
     Emissions Industrial Sources, San Francisco,
     1974:373-383.  EPA 600/2-74-008, PB 235829/9WP.

395  Glushkov, Yu.M.  Estimation of the  Efficiency of Fibrous
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     33_(6) :827-830, 1971.  Chem. Abstr.  1§_, 63634.

396  Pich,  J.   Theory of the Electrostatic Mechanism of
     Aerosol Filtration.  I.   Deposition of Charged Particles
     on Charged Fibers.  Sb. XI. Mendeleyevsk. S'yezd Obsh.
     Prikl.  Khim. Ref. Dokl. Soobshch. Moscow, "Nauka",
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397  Kirsh,  A.A., and I.E. Stechkina.  Flow Field and Dif-
     fusion  Precipitation of Aerosols in a Simple Model  of
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     Mekh.  Zhidk. Gaza 1973(4):149-155.  Chem. Abstr.  81,
     15065.                                            —
                              72

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398  Kirsh, A.A.,  I.E.  Stechkina,  and N.A. Fuchs.  Effect of
     Gas Slip on  the  Pressure Drop in a System of Parallel
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399  Kirsch, A.A., and  I.E.  Stechkina.  Pressure Drop and
     Diffusional  Deposition  of Aerosol in Polydisperse Model
     Filter.  J.  Colloid Interface Sci. 43_(1) : 10-16, 1973.

400  Kirsch, A.A., I.E.  Stechkina,  and N.A. Fuchs.  Gas Flow
     in Aerosol Filters Made of Polydisperse  Ultrafine
     Fibers.  J.  Aerosol Sci. 5:39-45, 1974.  Eng. Index
     74., 001354.              ~

401  Kirsh, A.A.,  and I.E. Stechkina.  Calculation and
     Measurement  of the Breakthrough of a Highly Dispersed
     Aerosol in a Fibrous Filter.   Sb. XI Mendeleyevsk.
     S'yezd Obsh.  Prikl.  Khim. Ref. Dokl. Soobshch.
     Moscow, "Nauka", 1975(3):48.   Ref. Zh. Khim. 1976,
     3178.                                        	

402  Moskvitin, V.V., and A.Ye. Smoldyrev.  On the Effect of
     Suspended Particles on  Hard Flow Boundaries.  Dokl. Akad.
     Nauk SSSR 1181(2) : 335-338, 1968.  APTIC No. 39262.

403  Bakanov, S.P., and B.M. Markeyev.  Movement of Gas Near a
     Hard Surface.  Zh.  Tekhn. Fiz. 44_(10) :2081, 1974.

404  Krasovitskiy, Yu.V., and K.A.  Krasovitskaya.  Separation
     of Aerosols  on Cylindrical Filter Screens.  Khim.
     Prom. 1974(9);694-697.  Chem.  Abstr. 81, 176694.

405  Tempel, F.G., and  V.V.  Osinovskiy.  Two  Problems of
     Non-Stationary Gas Filtration in Porous  Media.  Izv.
     Akad. Nauk Uzb.  SSR, Ser. Tekh. Nauk 1973(1):64-66.
     APTIC No. 51836.

406  Komissarov,  O.G.,  G.M.  Gordon, V.I. Vasilyev, and G.S.
     Rozhayskiy.   A Study of the Laws of Dust Sedimentation
     in Hose Filters  With Stream-Like Blow Through.
     Tsvetn. Metall.  1971(7):23-27.  APTIC No. 34313-

407  Komissarov,  O.G.,  and G.M. Gordon.  Experimental Study
     of the Deposition  of Dust and the Regeneration of Filter
     Fabric in Sleeve Filters with Air Jets.  Nauch. Tr.
     Nil Tsvet. Met.  1975(36);69-80.  Ref. Zh. Khim. 1976,
     61774.
                               73

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408  Kal'nin, Yu.V., and N.S. Kanusik.  Investigation of Dust
     Capacity of a Fibrous Layer.  Tr. Tsentr. N.-I. Proyekt.-
     Konstrukt. In-ta Profilakt. Pnevmokoniozov Tekhn.
     Bezopasn. 1974(10);27-32.  Ref. Zh. Khim. 1975, 181656.

409  Industrial Gas Cleaning and the Aerodynamics of
     Dust-Removal Apparatus.  Nil Prom. Sanit. Ochistka
     Gazov, Semibratovsk. Fil., Yaroslav. Obi. NTO
     Mashinostroit. Prom.-sti., Yaroslavl, 1975, 144 p.
     Ref. Zh. Khim. 1975, 11591.

410  Permyakov, B.A., S.V. Belov, V.A. Lozhkin, O.G. Karteusov,
     and M.K. Dorosh.  Investigation of the Hydraulic Charac-
     teristics of Filter Materials.  Khim. Neft. Mashinostr.
     1975(7);17-19.   Ref. Zh. Khim. 1975, 21168.

411  Kal'nin, Yu.V. and T.V. Bazhenova.  Determination of
     the Mean Radius of Fibers in Filtering Material.
     Tr. Tsentr. N.-I. Proyekt.-Konstrukt. In-ta
     Profilakt. Pnevmokoniozov Tekhn. Bezopasn.
     1975(10);107-111.  Ref. Zh. Khim. 1975, 161544.

412  Mednikov, Ye.P.  Migration Theory of Settling of Aerosol
     Particles From a Turbulent Flow Onto the Walls of Tubes
     and Channels.  Dokl. Akad. Nauk. SSSR 206(1);51-54,
     1972.  Phys. Abstr. 76, 33302.

413  Mednikov, Ye.P.  Migration Theory of Turbulent Inertial
     Deposition of Aerosols in Ducts and Channels; Comparison
     With Experiment.  Kolloidn. Zh. 37(2) :292-299, 1975.
     Ref. Zh. Khim. 1975, 16B1598.

414  Kazanskiy, V.V., O.V. Ratiyev, and N.N. Zadira.  Process
     of Regeneration of Filter Material. USSR Patent
     385,596, 1974.  Ref. Zh. Khim. 1975, 191770.

415  Sadovskiy, B.F.  Evaluation of the Effectiveness of
     a Self-Cleaning Filter.  Prom. Sanit. Ochistka Gazov,
     Nauch.-Tekhn. Sb.  1975(3):14-16.  Ref. Zh. Khim.
     1975, 191769.

416  Ushakova, Ye.N., V.I. Kozlov, and I.V. Petryanov.
     Investigation of the Effectiveness of Filtering Material
     of the Petryanov Type in the Inertial Region.  Kolloidn.
     Zh. T7(2):318-322, 1975.  Ref. Zh. Khim. 1975, 16B1599.

417  Keller, O.K., G.S. Kratysh, R.G. Timirkeyev, and A.N.
     lashvili.  Effect of Intensity of Ultrasound on  the
     Throughput of Small Capillary Filter Materials and  the
     Extent of Their Cleaning.  Tr. Vses. N.-I.  Proyekt.-
     Konstrukt. In-ta Tokov Vysok. Chastoty 1974(14):247-251.
     Ref.  Zh.  Khim. 1975, 7148.
                               74

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418  Kirsh, A.A., and N.A.  Fuks.   The Flow of Air in a
     Metal Porous Barrier.   Teor.  Osnovy Khim. Tekhnol.
     9(2):311-312,  1975.  Ref.  Zh. Khim. 1975, 14B1729.

419  Pashatskiy, N.V.   Two-Dimensional Flow of Gas With
     Particles  in a Nozzle.   Tr. Ural'sk. Politekhn. In-ta Sb.
     1974(227);42-47.   Ref.  Zh. Khim. 1975, 1134.

420  Romanov, K.V., and S.K.  Chernyshev.  Calculation of
     Capture Coefficients for Spheres at High Reynolds
     Numbers.   Fiz. Aerodispersnykh. Sist. Mezhved. Nauk
     sb- 1974(10);12-16.  Ref.  Zh. Khim. 1975, 7B1850.

421  Stavitskaya, A.V.   On  the  Capture of Water Aerosol Droplets
     by  Plane Obstacles in  the  Form of Star-Shaped Crystals.
     Izv. Akad. Nauk SSSR,  Fiz. Atmosf. Okean 8(7):768-722,
     1972.  APTIC No. 46572.

422  Smirnova,  I.N., L.N. Nik-Brodova, and N.N. Zidra.  Methods
     of  Estimating  the  Size Distribution of Open Pores in a
     Fabric.  Sb. Nauch. Tr.  Leningr. In-ta Tekstil'n. Legk.
     Prom-sti 1974(15);102-5.   Ref. Zh. Khim. 1975, 2T885.

423  Borisov, N.I.  Study of  Volumetric and Surface
     Characteristics of Lubricants Defining the Film
     Thickness  on the Panels  of Self-Cleaning Filters.
     Tr. Tsentr. N.-I.  Proyekt.-Eksp. In-ta Prom.
     Zdaniy Sooruzh. 1974(33);62-70.  Ref. Zh. Khim. 1975,
     11804.

424  Druzhinin, E.A., S.I.  Popov,  and I.V. Petryanov.
     Hydrodynamic Resistance  of FP Materials Made From a
     Mixture of Fibers  of Different Diameters.  Prom. Sanit.
     Ochistka Gazov, Nauch.-Tekh.  Sb. 1974(5);7-10.  Ref. Zh.
     Khim. 1975, 2179.

425  Kal'nin, Y.V., N.S. Kanusik,  and A.V. Illarionov.
     Study of Multilayer Fiber  Filters.  Tr. Tsentr. N.-I.
     Proyekt.-Konstrukt. In-ta  Profilakt. Pnevmokoniozov
     Tekhn. Bezopasn. 1974(10);112-117.  Ref. Zh. Khim.
     1975, 161545.

426  Kirsh, A.A., I.B.  Stechkina,  and N.A. Fuks.  Efficiency
     of  Aerosol Filters Consisting of Ultrafine Polydisperse
     Fibers.  Kolloidn.  Zh.   37(1):41-48, 1975.  Chem. Abstr.
     83^, 30366.

427  Goryachev, I.K., Ye.G.  Trofimov, and V.I. Mikerov.
     Bag Filters for Double Cleaning of Gases.  Sb. Prom.
     Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh
     Apparatov. Yaroslavl,  1975;120-122.   Ref.  Zh. Khim.
     1976, 41729.


                               75

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 428  Mal'gin, A.D.  Process of Impulse Cleaning of Filter
     Bags.  Sb. Prom. Ochistka Gazov Aerogidrodinamika
     Pyleulavlivayushchikh Apparatov. Yaroslavl,
     1975:106-112.  Ref. Zh. Khim. 1976, 41728.

 429  Raykes, M.E.  Structure for Cleaning Filter Elements.
     USSR Patent  425,636, 1974.  Ref. Zh. Khim. 1976,
     11636.

 430  Kurkin, V.P.  Distribution of a Dust-Laden Stream  in a
     Bag Filter.  Prom. Sanit. Ochistka Gazov, Nauch.-Tekh.
     Sb. 1975(4);4-6.  Ref. Zh. Khim. 1975, 22155.

 431  Mitnik, V.L., and A.S. Mandriko.  Effect of Hydraulic
     Resistance of the Dust Layer on the Filtration Process
     With Regeneration of the Fabric by the Twisting Method.
     Nauch. Tr. N.-I. i Proyekt. In-t Redkomet. Prom-sti
     1974(62);20-24.  Ref. Zh. Khim. 1975, 151760.

 432  Mitnik, V.L., F.B. Lyutin, and A.S. Mandriko.  Regenera-
     tion of the  Fabric in a Sleeve Filter.  Nauch. Tr. N.-I.
     i Proyekt. In-t Redkomet. Prom-sti 1974(62):25-28.  Ref.
     Zh. Khim. 1975, 151761.

 433  Sobko, V.P., and A.I. Bykov.  Mechanical Shaking of
     Filter Bags  With an Electro Vibrator.  Lakokrasochn.
     Mater. Ikh Primen. 1974(6):65.  Ref. Zh. Khim.  1975,
     81620.

 434  Lapenko, V.G., and B.I. Myagkov.  Bag Filter With  Reverse
     Jet Cleaning.  Sb. Mekhan. Ochistka Prom. Gazov, Moscow,
     "Mashinostroyeniye," 1974:101-114.  Ref. Zh. Khim. 1975,
     31826.

 435  Mal'gin, A.D., V.N. Saksin, and R.M. Yefimov.   Frame-
     work Filters With Pulsed Scavenging.  Mekhan. Ochistka
     Prom. Gazov, Moscow, "Mashinostroyeniye," 1974:94-100.
     Ref. Zh. Khim. 1975, 31829.

 436  Anokhim, L.A., V.A. Kon'kov, Ye.M. Levin, S.B.  Loyko,
     D.D. Sysoyev, S.N. Solov'yev, and V.V. Timofeyev.
     Filter for Fine Cleaning of Gas.  USSR Patent 411,877,
     1974.  Ref.  Zh. Khim. 1975, 11801.

 437  Abrosimov, Yu.V.  Improvement in the Design of  Fabric
     Filters.  Sb. Mekhan. Ochistka Prom. Gazov, Moscow,
     "Mashinostroyeniye," 1974:89-93.  Ref. Zh. Khim.  1975,
     31825.                	                        	

438  Kurkin, V.P., N.M. Dralyuk, and V.P. Aleksandrov.
     Structure for Support of Fabric Filter Sleeves.
     USSR Patent 424,583, 1974.  Ref. Zh. Khim. 1975,
     101590.                                    	

                              76

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439  Mazus, M.G., and A.Ya. Suslov.  Technico-Economic
     Evaluation of Fabric Filter Installations.  Prom. Sanit.
     Ochistka Gazov, Nauch.-Tekh. Sb. 1975 (1)-.21-24.
     Ref. Zh. Khim. 1975, 121804.     	

440  Kulikov, G.S., B.I. Byalyy, Yu.P. Khlebnikov, and
     V.D. Snevchenko.  Studies on the Regeneration
     of Nonwoven Filter Fabrics.  Vodosnabzh. Sanit. Tekhn.
     1971(8):28-30.  APTIC No. 35758.

441  Mai'gin, A.D., and V.N. Saksin.  A Method of Regenera-
     tion of Frame Type Filter Sleeves.  USSR Patent
     453,176, 1975.  Ref. Zh. Khim. 197_5,  161543.

442  Gordon, G.M., A.A. Slovikovskiy, Z.V. Yefremova, N.P.
     Ozolit, and M.N. Formina.  Correlation of the Structure
     and Properties of Filter Cloth with the Basic Indexes
     of Filtration of Dust-Laden Gases.  Sb. Nauch. Tr. Cos.
     Nauch.-Issled. Inst. Tsvet. Metall. 1970(31);62-78.

443  Kostyuchenko, I.S.  Measurement of the Breakthrough
     Coefficient of a Filter Toward Dust.  Sb. Prikl.
     Gidromekh. Teplofiz, Krasnoyarsk, 1974(4):13-18.
     Ref. Zh. Khim. 1975, 231703.

444  Gordon, G.M., and V.I. Teplitskiy.  Mechanisms of
     Deposition of Dust Particles in Filtering a Dust-Laden
     Gas Through a Metalloceramic Screen.  Nauch. Tr. Nil
     Tsvet. Met. 1975(36);80-86.  Ref. Zh. Khim. 1976, 61776.

445  Kurkin, V.P., Ye.A. Vikhrov, and V.N. Uzhov.  Modern
     Filtration Apparatus for Cleaning of  Emissions of
     Industrial Plants.  Sb. Mekhan. Ochistka  Prom. Gazov,
     Moscow, "Mashinostroyeniye," 1974;77-88.  Ref. Zh. Khim.
     1975, 31828.

446  Mal'gin, A.D., and Yu.I. Gromov.  Comparative Charac-
     terization of Filter Materials from Polymers.  Sb.
     Dokl., Mezhoblastnogo Seminara Ochistke Gazov
     [Inter-Regional Seminar on Gas Cleaning], Yaroslavl,
     1972-.84-91.

447  Kulikov, G.S., Yu.P. Khlebnikov, V.G. Usatenko,  and
     V.D. Shevchenko.  Studies on Filter Fabrics  for  Dry
     Filters of General Use.  Vodosnabzh.  Sanit. Tekhn.
     1972(11);16-18.  APTIC No. 37780.

448  Vershinina, K.I.  Glass Fabrics  for Cleaning  Industrial
     Gases at High Temperatures.  Prom. Sanit. Ochistka
     Gazov, Nauch.-Tekh. Sb. 1975(5);3-5.
                               77

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 449  Kurkin, V.P., and Demidova, L.S.  Effect of  the Moisture
     Content of Air on the Thermomechanical Strength of
     Elementary Fiberglass.  Zh. Prikl. Khim.  4_5 (9) :2072-2074,
     1972.  Chem. Abstr. 78, 19632.

 450  Kurkin, V.P., and M.N. Bessonov.  Some Characteristics  of
     the  Thermomechanical Properties of Glass Fabrics.
     Zh.  Prikl. Khim. 42^(8) :1918-1920, 1969.  Eng.  Index
     1970,  3564.

 451  Osina, S.A.  Chemico-physical  Investigation  of Filter
     Materials Made From Glass Fibers.  Tr. Tsentr.  N.-I.
     Proyekt-Eksp. In-ta Prom. Zdaniy Sooruzh.
     1974(33);114-18.  Ref. Zh. Khim. 1975, 11803.

 452  Teplitskiy, V.I., and G.M. Gordon.  Filtration of
     Dust-Laden Gases by Metal Ceramic Filters.   Sb. Nauchn.
     Tr.  Nil Tsvetn. Metall. 1970(31):78-95.  Ref.  Zh. Metal.
     1970,  12G30.

 453  Abrosimov, Ye.V.  Some Peculiarities of Filtration of
     Dust-Laden Gases With Metal Fabrics.  Mekhan.  Ochistka
     Prom.  Gazov, Moscow, "Mashinostroyeniye," 1974:127-134.
     Ref.  Zh. Khim. 1975, 31827.

 454  Mandriko, A.S., I.L. Peysakhov, and S.V. Gerasimov.
     Removal of Dust From Gases Under Pressure and  at  High
     Temperature.  Nauch. Tr. N.-I. i Proyekt. In-t Redkomet.
     Prom-sti 1974(62);13-19.  Ref. Zh. Khim. 1975,  151707.

 455  Kabanov, N.V.  High-Temperature Cleaning of  Gas  in the
     Carbon Black Industry.  Sb. Prom. Ochistka Gazov
     Aerogidrodinamika Pyleulavlivayushchikh Apparatov.
     Yaroslavl, 1975;122-127.  Ref. Zh. Khim. 1976,  41734.

 456  Mandriko, A.S., and I.L. Peisakhov.  High-Temperature  and
     Rapid Filtration of Aerosols,  in the Metallurgy of Non-
     Ferrous and Rare Metals.  Tsvetn. Metall. 1970(11):55-60.
     APTIC No. 53082.

 457  Kurkin, V.P., et. al.  Study of Thermomechanical  and
     Filtering Properties of High Temperature Synthetic
     Fabrics.  Prom. Sanit. Ochistka Gazov, Nauch.-Tekh.
     Sb.  1975.

458  Zoria, L.L., and T.I. Babashkina.  Recovery  of Titanium
     Dioxide From Flue Gases With Metal Ceramic Filters.
     Lakokrasochn. Mater. Ikh Primenen.  1971(4):82-84.
     APTIC No. 36518.                    	

459  Smirnov, S.P.,  V.A. Budaev, and M.P. Nerushin.  Dust
     Separator.   Mashinostroit. 1975(1):22-23.  APTIC  No.
     74185.                     	


                               78

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460  Khalimon, I.I., A.I. Smushkevicy,  and Ye.I. Gaponov.
     Use of Ion Exchange Fiber Materials  for Separation of
     Liquid Aerosol Particles  in Purification  of Galvanic
     Shop Exhausts.  Probl. Okhrany Truda Kazan1
     1974:283-284.  Ref. Zh. Khim. 1975,  31746.

461  Lebedyuk, G.K., B.I. Myagkov, I.G. Kemenshchikov, and
     V.V. Malikov.  High Velocity Synthetic Fiber Mist
     Eliminators.  Proc. Symp. Control  Fine-Particulate
     Emissions Industrial Sources, San  Francisco,
     1974:317-326.  EPA 600/2-74-008, PB  235829/9WP.

462  Sadovskiy, B.F.,  and I.V. Petryanov.  Removal of Aerosols
     With a Liquid Dispersed Phase and  Migration of the
     Liquid to a Fibrous Filter.  Sb. Mezhdunar. Konf. Fiz.
     Aspekty  Zagryaz.  Atmosf.  1974. Tezisy Dokl. Vil'nyus
     1974:141-142.  Ref. Zh. Khim. 1975,  11796.

463  Kirsh, A.A., and  V.A. Dvukhimennyy.  The  Efficiency
     of Impact of Droplets on  Fine Fibers.  Teor. Osnovy
     Khim. Tekhnol. 9(5):796-797, 1975.   Ref.  Zh. Khim.
     1976, 2158.

464  Sadovskiy, B.F.,  and I.V. Petryanov.  Removal of Aerosols
     With a Dispersed  Liquid and Migration of  the Liquid in
     a Fibrous Filter.   Zashchita Atmosf. Zagryaz.  Vil'nyus,
     1974(2);62-68.  Ref. Zh.  Khim. 1975, 181653.

465  Lebedyuk, G.K., V.P. Prikhod'ko, and B.I. Berg.  Investi-
     gation of the Hydrodynamics of Horizontal Louver-Type
     Drop Collectors.  Sb. Mekhan. Ochistka Prom. Gazov,
     Moscow,  "Mashinostroyeniye," 1974:61-69.  Ref. Zh.
     Khim. 1975, 31754.

466  Lebedyuk, G.K., V.P. Prikhod'ko, and N.A. Sidorenko.
     The Expediency of Using Inclined Louver-Type Droplet
     Collectors.  Sb.  Mekhan.  Ochistka  Prom. Gazov, Moscow,
     "Mashinostroyeniye," 1974:70-76. Ref. Zh. Khim. 1975,
     31774.

467  Orlov, M.A., A.I. Furman, and A.A. Orlov.  Filter for
     Removing Mist.  USSR Patent 423,485, 1974.  Ref.
     Zh. Khim. 1975, 181655.

468  Sadovskiy, B.F.,  V.V. Gavrilov, F.Ya. Frolov, A.P.
     Bazarov, and I.V. Petryanov.  Small-Clearance
     Self-Cleaning FTR Filters for Mist Collection.  Intern.
     Chem. Eng. 14(1):140-141, 1974.  APTIC No. 58313.
                               79

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 469  Myagkov, B.I.,  I.G. Kamenshchikov, Yu.A. Papsuyev,
     A.A. Brodskiy,  A.I. Klenitskiy, S.I. Iskakov, and
     P.N. Popov.  Testing of Fiber Filters for Catching
     a Mist  of Furnace-Process Phosphoric Acid. Prom.
     Sanit.  Ochistka Gazov, Nauch.-Tekh. Sb. 1972(6);4-7.
     Chem. Abstr. 80,  38703.

 470  Osadchaya, T.M.,  and B.I. Myagkov.  Determination of
     the Optimum Structure of Synthetic Felt for Filtration
     of Fogs of Corrosive Acids.  Nauchno-Issled. Tr.,
     Tsentr. N.-I.  Inst. Sherst. Prom-sti 1973(26);98-105.
     Chem. Abstr. £2,  63743.

 471  Ovchinnikova,  Ye.N., and N.G. Vereshchago.  Collection
     Efficiency of  a Liquid Aerosol by an Oscillating
     Filament.  Fiz. Aerodispersnykh Sist. 1973(8):23-26.
     Chem. Abstr. 82,  45754.

 472  Teverovskaya,  B.A., Yu.I. Rozengart, G.F. Yurchenko,
     P.I. Shestak,  and I.D. Konev.  Experimental Tissue
     Filter  for Cleaning Open-Hearth Furnace Waste Gases
     Before  Waste-Heat Boilers.  Stal1 1972(6);566-568.
     APTIC No. 46678.

 473  Kireyev, V.N.,  and V.P. Kurkin.  Cleaning of Gases
     from Electric  Furnaces by Filtration.  Sb. Dokl.
     Mezhoblastnogo Seminara Ochistke Gazov  [Inter-Regional
     Seminar on Gas  Cleaning], Yaroslavl, 1972:110-114.

 474  Teverovskiy, B.Z., Yu.I. Rozengat, V.I. Sergeyev,
     V.N. Bytkin, and R.S. Bernshtein.  Rotary Fabric Dust
     Collector Studied Under Working Conditions of a
     Sintering Plant. Stal' 1974(12) :1143-1144.  Chem. Abstr.
     82., 128835.

 475  Kugovskiy, S.E., and V.G. Stetsenko.  Effective Cleaning
     of Vapor-Dust  Emissions.  Vodosnabzh. Sanit. Tekhn.
     1973(3);25-29.  APTIC No. 52191.

 476  Aizenberg, B.Sh., et al.  Operation of a Bag Filter
     With Air Jet Fabric Cleaning.  Tsvetn. Metall.
     1969(8);44-48.  APTIC No. 35478.

 477  Petrushov, V.P., G.M. Gordon, and D.F. Aptekar. Mea-
     sures Applied to Reduce the Aggressivity of Waste
     Gases and to Improve the Working Conditions for Bag
     Filter Tissues.  Tsvetn. Metall. 1972(7):29-31.
     APTIC No.  46560.

478  Mandriko,  A.S., I.L. Peisakhov, and N.P. Kozyr. Re-
     moval of Dust From Gases in Ore-Heat Treating Furnaces
     During the Smelting of Titanium Slag.  Tsvetn.  Metall.
     1974(3);46-48.   Chem. Abstr. 81, 95804.
                              80

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479
       XrMY£V'^  ?'' G'M- Gordon, V.V. Zapasnyi, B.A. Smirnov,
     f^Iv, A   uzolit-   Industrial Tests of Dacron Fabric
     With Gases of Lead-Zinc and Copper-Smelting Plants.
     Tsvetn. Metall. 1974(1);56-58.  Chem. Abstr. 80, 12220.

480  Kozyr, N.P., A.Ye. Chebanov, and B.P. Titomer.  Properties
     ot Gases and Dust  During Smelting of Titanium Slags in
     i^r>T7Ave\x^ r\v»**. O«-.«T i_ • __ _ .«           _
     -,«-,„,•,-, Ore  Smelting  Furnaces.   Tsvetn. Metall.
     1974(11);52-53.   Chem.  Abstr.  82,  76653.

481  Savrayev, V.P.,  and V.V.  Zapasnyy.   Investigation of
     Cleaning  Gases From Lead  and  Zinc  Plants  by New Filtering
     Materials.   Sb.  Tr. VNII  Tsvet.  Met.  1975(25):269-278.
     Ref.  Zh.  Khim. 1975,  151755.          	

482  Kurkin, V.P.  Removal of  Carbon  Black from Industrial
     Gases.  Proc. Symp. Control Fine-Particulate  Emissions
     Industrial Sources, San Francisco,  1974:479-487.
     EPA 600/2-74-008,  PB  235829/9WP.

483  Mal'gin,  A.D., V.N. Saksin, and  R.B.  Mandel'.  Experiments
     on Modernizing Fabric Filters  at the  "Pobeda  Rabochnik"
     Plant.  Sb.  Dokl., Mezhoblastnogo  Seminara Ochistke
     Gazov [Inter-Regional Seminar  on Gas  Cleaning],
     Yaroslavl, 1972;70-76.

484  Lyutin, F.B., I.L. Peisakhov,  and  B.N. Cheboksarov.
     Performance  of a Bag  Filter During Filtration of a
     Gas With  a Large Concentration of  Finely  Divided
     Titanium  Dioxide.  Nauch.  Tr.  N.-I.  i Proyektn. In-t.
     Redkomet. Prom-sti 1972 (40):118-127.  Chem. Abstr.
     81, 137965.

485  Mal'gin,  A.D., and G.A. Rumyantsev.   Filter - Cyclone for
     Cleaning  Gases After  the  Clinker-Cooler.  Tsement
     1975(6);10-11.   Ref.  Zh.  Khim. 1975,  191771.

486  Vologuyev, V.Ye.,  V.A.  Limanskiy,  and V.K. Goncharenko.
     Cleaning  of  Gases  From  Silicon Smelting Furnaces in
     Bag Filters.  Tsvetn. Metall.  1974(1):58-60.   Chem.
     Abstr.  81, 20943.

487  Mal'gin,  A.D.  The Selection  of  NIIOGAZ Cyclones and
     Methods for  Calculating Their  Efficiencies. Sb. Dokl.,
     Mezhoblastnogo   Seminara  Ochistke  Gazov  [Inter-Regional
     Seminar on Gas Cleaning],  Yaroslavl,  1972;23-30.

488  Mal'gin,  A.D., and I.V. Kukushkin.  Operating Charac-
     teristics and Selection of NIIOGAZ Cyclones.   Vodosnabzh.
     Sanit.  Tekhn. 1970(11).
                                81

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489  Ushakov, S.G.  The Coefficient of Useful Action of
     Large-Diameter NIIOGAZ Cyclones.  Sb. Tezisy Dokl.
     Itog. Nauch.-Tekhn. Konf. Ivanov. Energ. In-t,
     Ivanovo 1975;29-30.  Ref. Zh. Khim. 1975, 7R130.

490  Burov, A.I.  Centrifugal Separation of Aerosols From
     High-Capacity Production Processes.  Sb. Materialy
     Nauch. Konf. Altaysk. Politekhn. In-t. Ch. 4.  Barnaul,
     1974;58-61.  Ref. Zh. Khim. 1975, 141658.

491  Karpukhovich, D.T.  Helical Inertial Dust Separators.
     Vodosnabzh. Sanit. Tekhn. 1972(7);28-31.  APTIC
     No.  46881.

492  Rastyapin, V.I., Yu.L. Marshak, and V.P. Osokin.
     Comparative Effectiveness of Inertial Dust Separators.
     Teploenergetika 1973(7):65.

493  Kalmykov, A.V., Yu.M. Afanas'yev, and N.G. Shipunov.
     Investigation of Domestic and Foreign Cyclone Com-
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494  Litvinov, A.  Calculation of the Dimensions of Gravity
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495  Reznik, V.A., and V.V. Matsnev.  Comparing the Charac-
     teristics of the Elements in Batteries of Cyclones.
     Thermal Eng. 1SM12) :324-339, 1971.

496  Burov, A.I., A.I. Zholos, and A.S. Lysenko.  Effective-
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497  Burov, A.I., A.I. Zholos, and A.S. Lysenko.  Industrial
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498  Matsnev, V.V., A.M. Belevitskiy, V.A. Reznik, and G.G.
     Rutenberg.  Construction of An Improved Direct
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499  Pervov, A.A., A.D. Mal'gin, and Ye.I. Pavlovskiy.   Cyclone
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500  Bakv'M'«-^'M- Ravik°vich, A.I. Sharov, V.D.
     Bakay, Ye.M. Britvin, and M.P, Polikarkin.  Multi-
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501  Yakovley, G.G.  Some Possibilities of Abating Thermal
     in^e«. «^nt Generated Emissions.  Teploenergetika
     11(10):87-89, 1972.  APTIC No. 47819^

502  Potapov, O.P.  Results of Industrial Experimentation
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     1973(10);8-10.                           y

503  Pervov, A.A., Ye.G. Trofinov, R.A. Tupitsyn, and B.I.
     Litovkin.  Results of Industrial Experiments With a
     Battery of BTsRN-150 Cyclones at the Yaroslavl TETs-2
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     Pyleulavlivayushchikh Apparatov, Yaroslavl, 1975:31-33.
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504  Karpukhovich, D-T.  Effect of. Cyclone Diameter on Effective-
     ness  in Removing Dust.  Elektr. Stantsii 1973(11) ;29.

505  Buznikov, Ye.P., and A.V. Yevdokimov.  Experimental Investi-
     gation of 2-Stage Extractive Cyclone.  Energetik 1975(9);13.

506  Mal'gin, A.D., A.A. Pervov, V.D. Al'patov, V.G. Lopatukhin,
     and D.M. Trofimov.  Experimental Use of a Cyclone Battery
     With  Recirculated Plow for Removal of Peat Ash at
     Yaroslavl TETs-1.  Sb. Dokl., Mezhoblastnogo
     Seminara Ochistke Gazov  [Inter-Regional Seminar on
     Gas Cleaning], Yaroslavl, 1972;59-64.

507  Notych, A.G., V.V. Mosiashvili, Y.G. Strel'chenko, N.I.
     Globa, L.N. Tyutyunnik, and B.D. Kotlyaf.  Optimization of
     Dust  Extraction on the Slag Pockets of Open-Hearth Furnaces,
     Izv.  Vyssh. Uchebn. Zaved. Chern. Met. 1973(5) -.39-42.

508  Kalmykov, A.V., and M.T. Gubanov.  Uniflow Battery Dust
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509  Khanin, I.M., A.F. Shevchenko, and E.V. Brodskiy.  Com-
     bined  Process for Removing Dusts From Technical Gases.
     Sb. Probl. Okhrany Tr., Kazan, 1974:272.   Ref. Zh. Khim.
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510  Ryabchikov, S.Ya.  Cleaning of Gases  in Catalytic
     Cracking Plants.  Sb. Dokl., Mezhoblastnogo Seminara
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     Yaroslavl, 1972;95-101.


                              83

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511  Ryabchikova, S.Ya., B.K. Amerik, D.T. Karpukhovich, and
     L.N. Gusev.  Dust Collecting System of Fluidized-Bed
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     Chem. Abstr. 83, 62474.

512  Mal'gin, A.D., and A.A. Pervov.  Use of the BTsRN-150 Fly
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513  Pervov, A.A.  Aerodynamic Studies of NIIOGAZ Cyclones
     With Devices for Reduction of Hydraulic Drag.
     Mekhan. Ochistka Prom. Gazov, Moscow, "Mashinostroyeniye,"
     1974;160-170.  Ref. Zh. Khim. 1975, 31748.

514  Pervov, A.A., and V.S. Razhev.  Rational Ways to Reduce
     the Hydraulic Resistance of Cyclones.  Sb. Dokl.,
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515  Volkov, Ye-V., and S.M. Suslov.  Aerodynamic Resistance
     of a Cyclone Chamber With a Circulating Solid Dispersed
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516  Mal'gin, A.D.  Aerodynamic Study of an Element of  a
     Cyclone Battery Operating With Extraction and Recirculation
     of the Stream.  Sb. Mekhan. Ochistka Prom. Gazov,  Moscow,
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517  Uspenskiy, V.A., V.I. Solovyev, and V.S. Guryev.   The
     Study of Velocity Fields in a Vortex Dust Collector.
     Nauk. Tekh. 2£(6):1078-1081, 1971.  APTIC No. 35543.

518  Uspenskiy, V.A., V.I. Solor'yev, and V.S. Gur'yev.  Studying
     Velocity Fields in a Cyclone Separator.  Fluid Mech.-
     Sov. Res. 1(1):152-155, 1972.  Eng. Index 72, 005312.

519  Idel'chik, I.Ye.  Hydraulic Drag of Cyclones, its  Deter-
     mination, Value and Means of its Reduction.  Mekhan.
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     1974;135-159.  Ref. Zh. Khim. 1975, 31776.

520  Lyutin, F.B., and I.L. Peysakhov.  Problem of Trapping
     of Highly Dispersed Particles in Dust Chambers and
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521  Sherstyuk, A.N.  Approximate Determination of Velocities
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522  Ushakov, S.G., and Yu.N. Muromkiy.  Improving the First
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523  Saparov, I.V. , et al.  Increasing the Reliability of Cy-
     clones.  Energetik, 1973(6) :18.

524  Pervov, A. A., Ye.G. Trofimov, R.A. Tupitsyn, and
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     dinamika Pyleulavlivayushchikh Apparatov. Yaroslavl,
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525  Mai 'gin, A.D., and G.A. Rumyantsev.  Regeneration of
     a Saturated Layer in a Filter-Cyclone and Construction
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526  Yankovskiy, S.S., and N.G.  Bulgakova.  Graphical Method
     of Determination of Curve of Fractional Efficiency of
     Cyclones and  Dust Particle  Size.  U.S. /USSR Working
     Group on Stationary Source  Air Pollution Control
     Technology Project A-4.

527  Bulgakova, N.G., and S.S. Yankovskiy.  Modeling Labora-
     tory Cyclones.  U.S. /USSR Working Group on Stationary
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528  Kiselev, P. I., and V.M. Petrov.   Improved Dust Separator.
     Elektr. Stantsii 1973(8) ;70.

529  Bulgakova, N.G., and S.S. Yankovskiy.  A Method of
     Graph-Analytic Calculation  of  the Full and Fractional
     Effectiveness of Dust Trapping Apparatus.  Mekhan.
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     1974:20-25.   Ref. Zh. Khim. 1975, 41652.

530  Pavlovskiy, Ye. I.  Estimate of  the  Influence  of  the
     Distribution  of Tangential  Low Velocities Over the
     Width of a Curved Channel on Separation  of  Dust
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     1975, 31757.
                                85

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531  Mai'gin, A.D., and A.A. Pervov.  Use of Ash Collector
     BTsRN-150 in Electric Power Plants Using Cut Peat.
     Energetik 1973(10);10-11.

532  Mai'gin, A.D., and N.V. Kabanov.  Cleaning of High-
     Temperature Gases by Granular Bed Filters.  Sb. Dokl,
     Mezhoblastnogo Seminara Ochistke Gazov  Inter-Regional
     Seminar on Gas Cleaning , Yaroslavl, 1972;77-84.

533  Os'mak, V.V.  Filter for Cleaning Gases.  USSR Patent
     440,145, 1975.  Ref. Zh. Khim. 1976, 21663.

534  Gatin, A.I.  Process for Charging Dust-Laden Gases.
     USSR Patent 411,905, 1974.  Ref. Zh. Khim. 1975,  21697.

535  Stark, S.B., and Yu.D. Glebov.  Dust Separation From Gases
     At High Temperatures.  Izv. Vyssh. Uchebn. Zaved. Chern.
     Met. 1^(7) .-168-170, 1971.  APTIC No. 37444.

536  Trushchenko, N.G., Yu.N. Kashichkin, and B.D. Mishchenko.
     Cleaning of High Temperature Exhaust Gases.  Tr.  N.-I.
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537  Krasovitskiy, Yu.V., V.A. Zhuzhikov, K.A. Krasovitskaya,
     and V.Ya. Lygina.  Separation of Aerosols by Filtration
     at a Constant Rate and With Gradual Clogging of Parti-
     tion Pores.  Khim. Prom. 1974(4):296-299.  Chem.  Abstr.
     83, 62576.

538  Sharapov, K.A., V.V. Leonov, I.L. Sakharnova, A.F.
     Skvortsov, and N.G. Braginets.  Study of a Multigradient
     Electromagnetic Filter for the Dry Cleaning of Gases.
     Stal' 1975(10);963-964.  Ref. Zh. Khim. 1976, 61775.

539  Kurkin, V.P.  Sound Generation Mechanism in Gas Jet Sound
     Radiators.  Akust. Zh. 10(2):191-194, 1964.  Eng.  Index
     1965, 2303.            ~~

540  Kurkin, V.P. Obliqus-Shock Gas-Jet Sound Radiator.  Akust.
     Zh. £(4) :438-441, 1962.  Phys. Abstr. (56, 16703.

541  Kurkin, V.P.  Sound Generated by a Gas-Jet Siren.  Akust.
     Zh. 7(4) :442-445, 1961.  Phys. Abstr. 65_, 15682.

542  Yermakov, V.V.  On the Question of Cleaning Stack Gases
     From Thermal Electric Powet Plants by Sound Waves.   Sb.
     Nauch.  Tr. Volgogr. In-t Inzh. Gor. Kh-va 1975(7):141-147.
     Ref.  Zh.  Khim. 1975, 12R103.
                                 86

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543  Mere, Kh.A., A.A. Kink, and A.p. Groinov.  Acoustical
     Coagulation of Shale Dust, Sb. Szhiganiye Topliv Minimal'n.
     Vredn. Vybrosami, Tallin, 1974;125-130.  Ref. Zh.
     Khim. 1975, 61578.        	

544  Kurkin, V.P.  Effective Emitter of Sound for Acoustic
     Coagulation of Aerosols.  Vestn. Tekhn. Ekon. Inform.
     Nauch.-Issled. Inst. Tekh.-Ekon. Issled. Cos. Kom. Sov.
     Mm. SSSR Khim.   1962(2) :40-41.  Chem. Abstr. 60,
     12901.            	                         —-

545  Severyanin, V.S.  Coagulation of Particles in Acoustic
     Fields.  Sb. Szhiganiye Topi. Minimal'n. Vredn.
     Vybrosami,  Tallin,  1974:121-124. Ref.  Zh. Khim. 1975,
     7B1851.             	                         	

546  Timoshenko, V.I.  Calculation of the Diffusivity of Aerosol
     Particles in a Sound Field.  Sov. Phys. Acoust.
     19_(5)-.504-505, 1974.   Eng. Index 74, 001294.

547  Malikov, V.V., B.I. Myagkov, A.A. Rusanov, and  S.S.
     Yankovskii.  Determination of the Extent of Dispersion
     of Sulfuric Acid  Mist.  Khim. Prom. 1970(5):365-366.
     Chem. Abstr. 73_,  90952.

548  Rusanov, A.A., and  S.S. Yankovskiy.  An Impactor With a
     Broadened Spectrum  of  Applicabilities.  Zavod.  Lab.
     3_8(10) :1289-1290, 1972.  APTIC No. 48859.

549  Bad'in, V.I., Yu. K Moiseyev, and Z.G. Batova.  On the
     Accuracy of Measurement of Size Distribution Parameters
     by Impactor.  Sov.  At. Energy 3^(5):1304-1306,  1971.
     Eng.  Index  72, 000263.

550  Kopyt, N.Kh., and M.N. Chesnokov.  Estimation of the Opera-
     tional Efficiency of Impactors During  Sampling  From Flows.
     Adv. Aerosol Phys.  1973(7) ;72-76.  Eng. Index 7_4, 001319.

551  Yankovskiy, S.S., and  L.Ya. Gradus.  Calculation
     and Calibration of  a NIIOGAZ  Impactor  with Planar
     Stages.  Prom. Sanit.  Ochistka Gazov,  Nauch.-Tekh. Sb.
     19i75(3) : 21-25.  Ref. Zh. Khim. 1975, 191705.

552  Yankovskiy, S.S., A.A. Rusanov, and Yu.V. Abrosimov.
     Multistage  Impactor for Gravimetric Particle Size
     Analysis of Solid Particle Aerosols.   USSR Patent
     261,772.

553  Yanovskiy,  S.S. and A.A. Rusanov.  Jet Separator for
     Determination of  Particle Size Composition of Industrial
     Dusts.  Peredovoy Nauchno-Tekhn. Proizvodstv. Opyt.
     No. 12-68-1436/37,  1968, 5 pp.  APTIC  No.  75274.


                                87

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554  Yankovskiy, S.S., and A.A. Rusanov.  Lubricant for
     Retaining Particles on a Solid Surface.  USSR Patent
     197,844.  APTIC No. 33088.

555  Boyev,  I.Ya., Ye.G. Levkov, V.A. Limanskiy, V.P. Bugayev,
     and A.S. Levkova.  Sampling, Separation and Fluorine
     Determination Techniques in Aluminum Manufacturing Plant-
     Produced Electrolysis Dusts.  Zavod. Lab. 3j8(3) :278-281,
     1972.   APTIC No. 41064.

556  Mandriko, A.S., I.L. Peisakhov, A.N. Rekhtman, and N.P.
     Kozyr'.  Aerosol Sampler for Chemical and Disperse
     Phase Analysis.  Zavod. Lab. 3_7 (10) :1272-1273,
     1971.   Phys. Abstr. 15_, 53463.

557  Padva,  V.Yu., Ye.N. Andrusenko, and L.G. Gomon.  Sampling
     From a  High-Temperature Dust-Gas Flow by an Internal
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     Chem. Abstr. 78, 61812.

558  Cheriyayeva, G.A., and B.F. Sadovskiy.  Application of
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     Dispersed Aerosols.  Sb. Mezhdunar. Konf., Fiz. Aspekty
     Zagayaz. Atmosf.  1974. Tezisy Dokl. Vil'nyus
     1974, 143-144.  Ref. Zh. Khim. 1975, 11749.

559  Ogorodnikov, B.I., V.I. Skitovich,  and  I.V. Petryanov.
     Use of  FP Fibrous Filter for Sampling and Analysis
     of Aerosols in the Atmosphere.  Sb. Mezhdunar. Konf.
     Fiz. Aspekty Zagryaz. Atmosf. 1974. Tezisy Dokl.
     Vil'nyus, 1974:139-141.  Ref. Zh. Khim.  1975,  11797.

560  Chernyayeva, G.A., and B.F. Sadovskiy.  Application of
     FP Fibers for Sampling and Electron Microscopic Analysis
     of Highly Dispersed Aerosols.  Sb.  Zashchita Atmosf.
     Zagryaz. Vil'nyus, 1974(2):69-76.   Ref.  Zh.
     Khim. 1975, 181659.

561  Kirsh, A.A., I.E. Stechkina, and N.A. Fuks.  Use of
     Ultrafine Glass Fiber Filters for the Investigation
     of Atmospheric Air Pollution Aerosols.   Sb. Mezhdunar.
     Konf. Fiz. Aspekty Zagryaz. Atmosf. 1974. Tezisy
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562  Anikeyev, V.A., V.P. Bugayev, V.A.  Limanskiy,  Ye.N.
     Andrusenko, and V.Yu. Padva. Technology of Particulate
     Sampling From Reactive, Damp, and High-Temperature
     Gases.   Proc. Symp. Control Fine-Particulate Emissions
     Industrial Sources, San Francisco,  1974;695-707.
     EPA 600/2-74-008, PB 235829/9WP.
                              88

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563  Shkatov, Ye.F.,  v.S. Matruchenko, and Ye.V. Shatayeva.
               SU1Pment With  Aut<™atic Stabilization of
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564      aA S'P"  and  L-M'  Levin.  Experimental Study of the
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565  Kopylov,  V.p.   Designing  Tape  Feed Mechanism  for Frame
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566  Kosenko,  A.I.   A Modified Tubular Electrostatic Precipi-
     tator  for  Collecting  Dust Samples From the Air.  Gig.
     Sanit.  3_5(8) .-68-70, 1970.  APTIC No.  24686.

567  Kornev, M.A.,  and V.M.  Tkachenko.  Measurement of Degree
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     60, 201.                   -

568  Yankovskiy, S.S.,  and N.G. Bulgakova.   Graphical Method of
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     5(4) :615-616,  1971.   APTIC No. 33787.

569  Yankovskiy, S.S.,  and N.A. Fuks.  Particle Size Analysis
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     Zavod.  Lab. 32^(7) -.811-815, 1966.  Eng.  Index  1967,  34.

570  Yankovskiy, S.S.,  and V.P. Kurkin.  Instrumentation for
     Dispersion Analysis of  Particulates in Industry.  Proc.
     Symp. Control Fine-Particulate Emissions Industrial
     Sources,  San  Francisco, 197J ; 673-693.   EPA 600/2-74-008,
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571  Tammet, Kh.F.   Electrical Granulometry of Aerosols.  Tartu
     Ulikooli  Toim.  Uch. Zap.  Tartus.  Un-ta, 348 .-30-34,
     1975.

572  Yankovskiy, S.S.,  and N.A. Fuks.  Method of Determina-
     tion of Aerosol Particle  Size  Composition.  USSR
     Patent 161,963.   APTIC  No. 75280.

573  Bulgakova, N.G.,  L.Ya.  Gradus, and S.S. Yankovskiy.
     Comparison of Various Methods  of Dispersion Analysis
     of Dusts  and Mists.   Mekhan. Ochistka Prom. Gazov,
     Moscow, "Mashinostroyeniye," 1974 ;211-219.  Ref.  Zh.
     Khim.  1975, 31750.


                                89

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 574  Kurilovich, V.P., K.M. Nikolayev, Yu.M. Protasov,
     and A.S. Rodionov.  Method of Determination of Degree
     of Monodispersion of Aerosols.  Zavod. Lab.
     41(l):55-56, 1975.  Ref. Zh. Khim 1975, 11B1823.

 575  Kurkin, V.P.  Graph Analytic Method of Investigation
     of Aerodispersed Systems.  Mekhan. Ochistka Prom.
     Gazov, Moscow, "Mashinostroyeniye," 1974;6-20.
     Ref.  Zh. Khim. 1975, 31755.

 576  Kouzov, P.A., and G.M. Skryabin.  New Rotary Analyzer
     for Particle Size Composition of Industrial Dusts.
     U.S./USSR Working Group on Stationary Source Air
     Pollution Control Technology Project A-4.  APTIC No.
     75281

 577  Skryabin, G.M.  Apparatus for Measuring the Degree of
     Dispersion and Concentration of Dusts in a Gas Stream.
     Sb. Dokl., Mezhoblastnogo Seminara Ochistka Gazov
     [Inter-Regional Seminar on Gas Cleaning], Yaroslavl,
     1972;3-7.

 578  Bulgakova, N.G., A.A. Rusanov, and S.S. Yankovskiy.
     Method of Prevention of Precipitation of Dust
     Particles on the Walls of Sampling Tubes.  Mekhan.
     Ochistka Prom. Gazov, Moscow, "Mashinostroyeniye,"
     1974:235-239.  Ref. Zh. Khim. 1975, 31747.

 579  Yankovskiy, S.S.  Dispersion Analysis of Fine Industrial
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 580  Pashin, M.M.  Method of Registering the Movement of
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 581  Ivanova, A.P., S.V. Kolerskiy, I.I. Kravchenko, S.O.
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582  Kal'nin, Yu.V.,  and A.V. Illarionov.  Production of
     Model Aerosols from Solution.  Tr. Tsentr. N.-I.
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     1711688.                                          	
                              90

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583  Sutugin, A.G  , and A.A. Lushnikov.  Modelling the Co-
     agulation of  Highly Dispersed Aerosols.  Teor. Osnovy

     1975* 14B1730* -(2}:210~218' 1975'  Ref- zh- Khim-

584  Aleksandrov,  N.N., M.A. Belyashova, and G.S. Guniya.
     Some Results  of  Investivation of  the Microphysical
     Characteristics  of Liquid Aerosols in Industrial
     Emissions.  Tr.  Gl. Geofiz. Observ. 1974 (314):201-210.
     Ref. Zh. Khim. 1975, 31771.         	

585  Determination of Angle of Repose.  U.S./USSR Working
     Group on Stationary Source Air Pollution Control
     Technology Project A-4.  APTIC No. 75282.

586  Yankovskiy, S.S., and Ye.I. Tsyss.  Method of Determina-
     tion of Stickiness of Dust.  USSR Patent 258,730.
     APTIC No. 75283.

587  Andrianov, Ye.I., A.D. Zimon, and S.S. Yankovskiy.
     Device for Determination of Stickiness of Finely
     Dispersed Materials.  Zavod. Lab. 38 (3):375-376r 1972.
     APTIC No. 75284.

588  Methods of Investigation of Dust  Wettability. Lab.
     Proizvod. Ispytaniya Smachivayemosti Pyli, pp. 74-91.
     APTIC No. 75277.

589  Basic Equipment  of Dust and Gas Laboratories  (Sample
     List).  U.S./USSR Working Group on Stationary Source
     Air Pollution Control Technology  Project A-4.  APTIC
     No. 75278.

590  Yankovskiy, S.S., L.N. Tovgina, and Yu.V.  Abrosimov.
     Photoelectric Instrument for Measurement of Dust
     Concentration in Industrial Gases.  U.S./USSR Working
     Group on Stationary Source Air Pollution Control
     Technology Project A-4.  APTIC No. 75269.

591  Determination of Dust Content of  Gases.  U.S./USSR
     Working Group on Stationary Source Air  Pollution Control
     Technology Project A-4.  APTIC No. 75268.

592  Rozenshtein,  A.  Measurement of Parameters of Streams
     of Gas and Solid Particles by Optical Methods.  Eesti
     NSV Tead. Akad.  Toim., Fuus., Mat. 23(4):384-390, 1974.
     Chem. Abstr.  83, 12793.
                               91

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593  Methods Used in USSR for Determination of Concentrations
     and Physical and Chemical Properties of Dusts.
     U.S./USSR Working Group on Stationary Source Air Pollution
     Control Technology Project A-4.  APTIC No. 75267.

594  Kisler, C.Ya., and B.S. Fishkin.  Type PK-4 Automatic
     Immersion Contact Electric Dust Measurement Instrument.
     U.S./USSR Working Group on Stationary Source Air
     Pollution Control Technology Project A-4.  APTIC No.
     75270.

595  Popov, K.N., E.V. Agafonov, and L.N. Antipova.  Differen-
     tial Thermal Method for Determination of Concentration
     of Combustibles in Fly Ash of Pulverized Coal Fired
     Boilers.  Thermal Eng. lj>(2) :51-55, 1972.

596  Sin'kov, V.M., R.D. Tsiptsyura, L.P. Bogonosov, S.I.
     Nagornyi, O.L. Yanovskiy, B.N. Barbyshev, Yu.M. Bulavitskiy,
     A.F. Novikov, and A.N. Purtov.  Capacitance Method of
     Determining Concentration of Combustibles in Fly Ash.
     Teploenergetika 17(12)-.42-45, 1970.

597  Determination of Gas Humidity.  U.S./USSR Working Group
     on Stationary Source Air Pollution Control Technology
     Project A-4.  APTIC No. 75271.

598  Yankovskiy, S.S., and L.N. Tovgina.  Instrument for Dew
     Point Measurement of Industrial Gases.  U.S./USSR
     Working Group on Stationary Source Air Pollution Con-
     trol Technology Project A-4.   APTIC No. 75272.

599  Determination of Actual Dust Density.  U.S./USSR Working
     Group on Stationary Source Air Pollution Control Technology
     Project A-4.  APTIC No. 75273.
                               92

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 1~"6PCH, NO. PRS-24 (TVA)
           TECHNICAL REPORT DATA
     iriease read Instructions on the reverse before completing!	
                                  3. RECIPIENT'S ACCESSION NO.
 4. TITLE AND SUBTITLE                     	.
 Recent USSR Literature on Control of Particulate
    Emissions from Stationary Sources
                                 5. REPORT DATE
                                   April 1977
                                  6. PERFORMING ORGANIZATION CODE
 Charles E.  Feazel
                                                        8. PERFORMING ORGANIZATION REPORT NO.
  PERFORMING ORGANIZATION NAME AND ADDRESS
 Southern Research Institute
 2000 Ninth Avenue,  South
 Birmingham, Alabama  35205
                                  10. PROGRAM ELEMENT NO.
                                  1AB012; ROAP 21ADL-034
                                  11. CONTRACT/GRANT NO.
                                  R802938-01 (EPA)
                                  TV42937A (TVA)
 12. SPONSORING AGENCY NAME AND ADDRESS                "
 EPA, Office  of Research and Development*
 Industrial Environmental Research Laboratory
 Research Triangle Park, NC  27711
                                  13. TYPE OF REPORT AND PERIOD COVERED
                                  Final; 1-12/76
                                  14. SPONSORING AGENCY CODE
                                   EPA/600/13 and TVA
 ^.SUPPLEMENTARYNOTES (*)Cosponsored by TVA/Chattanooga, H. Falkenberry, project offi-
 cer. EPA project officer is N. Jaworski, 919/549-8411 Ext 2821.
 16. ABSTRACT
           The report reviews approximately 600 articles, published between 1970 and  !
 1975 in several technical and scientific journals in the USSR and compiled and classi-  !
 fied according to subject content.  The articles  were selected as significant indicators !
 of the status of the technology of controlling air pollution by particulate emissions from
 stationary sources, with emphasis on fly ash from the combustion of coal in electric
 power plants.  Control devices include electrostatic precipitators, wet scrubbers,
 fabric filters, cyclones, and granular bed filters.
                              KEY WORDS AND DOCUMENT ANALYSIS
                 DESCRIPTORS
                                            b.lDENTIFlERS/OPEN ENDED TERMS
                                              c.  cos AT i Field/Group
Air  Pollution
Dust
Fly Ash
  oal
  ombustion
Electrostatic
  Precipitators
Scrubbers
Granular Materials
Fabrics
llectric Power Plants Dust Filters
         gnarators
         ON STATEME
Air Pollution Control
Stationary Sources
Particulate
USSR
Wet Scrubbers
Fabric Filters
          Fted Filters
13B
11G
21B      07A
21D
         HE
10B      13K
 S.'DISTRIBUTION STATEMENT

 Unlimited
                      19. SECURITY CLASS /ThisRep,
                      Unclassified
                     20. SECURITY CLASS (Thispage)
                      Unclassified
                                               22. PRICE
EPA Form 2220-1 (9-73)
                                          93

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