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 ------- 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. ------- 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 ------- 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 ------- 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 ------- 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 ------- 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. ------- 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. ------- 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). ------- 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 ------- (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). ------- 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) . ------- 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). ------- 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) . ------- 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) . ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- 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 ------- REFERENCES Alperovich, M.A., and I.K. Reshidov. Design Features of Modern Flue Gas Electrostatic Precipitators. Proc. Symp. Control Fine-Particulate Emissions Industrial Sources, San Francisco, 1974;79-95. EPA 600/2-74-008, PB 235829/9WP. Levitov, V.I., I.K. Reshidov, and V.M. Tkachenko. Theoretical Basis for Design of Modern High-Efficiency Electrostatic Precipitators. Proc. Symp. Control Fine-Particulate Emissions Industrial Sources, San Francisco, 1974:97-117. EPA 600/2-74-008, PB 235829/9WP. Kropp, L.I., and I.N. Shmigol1. Scrubbing Ashes With Unfavorable Electrophysical Properties From Flue Gases (Using Ekibastuz Coal as the Example). Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976:41-50. Zalogin, N.G., V.M. Tkachenko, Yu.S. Milovidov, and L.P. Yanovskiy. A Study of Electrostatic Precipitators in Power Stations Burning Baltic Shales. Elektr. Stantsii 1973(1);11-13. APTIC No. 75290. Mateyeva, I.I., V.S. Vdovchenko, N.V. Novitskiy, I.G. Khromykh, and I.I. Kleymenova. Ash Content of Coal From Ekibastuz Formation. Elektr. Stantsii 1973(10);66. Kropp, L.I., and G.S. Chekanov. Status and Prospects for the Solution of Problems in the Scrubbing of Ash From Flue Gases at Thermal Electric Power Plants. Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976;3-8. Kirpichnikov, B.N., I.E. Palatnik, V.V. Ponomarev, V.F. Steshenko, and L.K. Suleimenova. Behavior of a Deposited Layer of Ekibastuz Coal Ash on a Precipitator Electrode. Probl. Teploenerg. Prikl. Teplofiz. 1971(7):62-67. Chem. Abstr. 78, 128052. 34 ------- 8 Kizim, I.A., I.K. Reshidov, and V.M. Tkachenko. Removal of Ash From Flue Gases of Power Stations With Electro- static Precipitators. Proc. Symp. Control Fine-Particulate Emissions Industrial Sources, San Francisco, 1974:119-135. EPA 600/2-74-008, PB 235829/9WP. 9 Kropp, L.P., and I.N. Shmigol1. Increasing the Effective- ness of Trapping Fly Ash with Unfavorable Electrophysical Properties in Electrostatic Precipitators on Large Power Units. Report to U.S./USSR Working Group on Stationary Source Air Pollution Control Technology Project A-4, 1973. 10 Reshidov, I.K. The Origin of Reverse Corona in Electro- static Precipitators. Sb. Dokl., Mezhoblastnogo Seminara Ochistke Gazov [Inter-Regional Seminar on Gas Cleaning]. Yaroslavl, 1972;11-18. 11 Yanovskiy, L.P. Ways to Intensify the Electrical Scrubbing of Gases and Modernize Electric Precipitators. Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976;9-19. 12 Kizim, I.A., and I.K. Reshidov. The Optimal Charac- teristics of Corona Electrodes in Electrostatic Precipitators for Removal of High-Resistivity Dust. Sb. Prom. Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh Apparatov. Yaroslavl, 197J5; 72-77. Ref. Zh. Khim. 1976, 1R55. 13 Kizim, I.A., L.A. Kisel'man, I.K. Reshidov, and G.S. Chekanov. Results of Reconstruction of PGD-3-38-PBTs Electrostatic Precipitators. Elektr. Stantsii 1972(8);35-37. APTIC No. 75287. 14 Chekanov, G.S., I.A. Kizim, I.K. Reshidov, and O.N. Il'inskaya. Characteristics of Electrical Cleansing of Flue Gases by Freeing it of the Ash of Easily Mined Coal. Elektr. Stansii 1970(6);6-9. 15 Testing of a Combined Ash-Trapping Scheme. Energetik 1972(9);36. APTIC No. 47665. 16 Zalogin, N.G., Yu.S. Milovidov, V.K. Pis'mennyy, V.M. Tkachenko, and L.P. Yanovskiy. Installation of DGPNI-55-3 Electrostatic Precipitator for Cleaning Flue Gas of Shale Ash. Elektr. Stantsii 1973(6);35-37. APTIC No. 75291. 17 Kirpichev, Ye.F., and V.V. Matsnev. Performance of Electrofilter DGPN in Purification of Flue Gases from Combustion of Irsha-Borodino Coal. Elektr. Stantsii 42(7):33-36, 1971. APTIC No. 37231. 35 ------- 18 Rivkin, A.S. Behavior of the Mineral Part of Irsha- Borodinsk Coals During Their Power Engineering Processing. Vliyanie Miner. Chasti Energ. Topi. Usloviya Rab. Parogeneratov, Mater. Vses. Konf. 1973 (Pub. 1974) (2):155-166. Chem. Abstr. 83, 150098. 19 Yermilov, I.V., I.A. Kizim, and T.I. Dokuchayeva. Design and Technological Parameters of Horizontal Plate Type Electrostatic Precipitators. U.S./USSR Working Group on Stationary Source Air Pollution Con- trol Technology Task A-5, March 1975. 20 Grabovich, V.A., V.I. Petrov, A.A. Sapozhnikov, and Ye.K. Yakushin. Increasing the Effectiveness of Utilization of the Gas Cleaning Installation at the Electric Power Plant at Vinnitsaenergo. Energ. Elektrif. Nauch.-Proizv. Sb. 2(80):37-38, 1975. Ref. Zh. Khim. 1975, 9R116. 21 Zalogin, N.G., Yu.S. Milovidov, V.K. Pis'mennyy, V.M. Tkachenko, and L.P. Yanovskiy. Application of DGPNI-55-3 Electrostatic Precipitators for Cleaning Oil Shale Ash From Flue Gases. U.S./USSR Working Group on Stationary Source Air Pollution Control Technology. Project A-4, Task I, pp. 1-7, 1974. APTIC No. 75291. 22 Kizim, I.A., and A.N. Pyatigorskiy. Efficiency of Horizontal Electrostatic Precipitators. Energetik 1973(10);12-13. APTIC No. 75286. 23 Kizim, I.A., A.D. Mal'gin, and I.K. Reshidov. Study and Development of Collection Electrodes for Hori- zontal Electrostatic Precipitators. Elektricheskaya Ochistka Gazov Electrical Cleaning of Gases , Moscow, "Energiya," 1968:41-49. 24 Petrov, V.I., Yu. G. Mel'ko, and A.A. Kraynik. Utilization of Electrostatic Precipitator EGZ 3-3-177. Energetik 1973(12);8-9. 25 Brodskiy, Yu.N., and K.V. Balicheva. Problem of Determin- ing the Cost of Electrical Precipitator Installations for Removal of Dust. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh Sb. 1975(1);24-26. Ref. Zh. Khim. 1975, 121805. 26 Afanas'yeva, Z.A. Economic Evaluation of Dust-Removal Equipment. Sb. Prom. Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh Apparatov. Yaroslavl, 11975:139-142. Ref. Zh. Khim. 1976, 41684. 36 ------- 27 Kirpichnikov, B.N., I,A. Kirpichnikova, I.E. Palatnik, and L.K. Suleymenova. Some Results of Experimental Investigation of the Removal of Ash of Ekibastuz Coal in a Laboratory Electrostatic Precipitator. Sb. Probl. Teploenerg. Prikl. Teplofiz. Alma-Ata, "Nauka", 1975(10);53-58. Ref. Zh. Khim. 1975, 10R99. 28 Potapov, O.P., and E.D. Finger. Improvement of the Methods of Determination of the Efficiency of Ash Collection in Boiler Plants With Individual Systems of Pulverized Fuel Preparation. Teploenergetika 21(9):126-128, 1974. APTICNo. 77393. 29 Podoshevnikov, B.F. NIIOGAZ—25 Years. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2);l-9. 30 Lebedyuk, G.K., and V.N. Uzhov. Techniques for Removing Dust and Their Development at NIIOGAZ. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2):9-16. 31 Lazarev, V.I., and S.M. Golyand. The Development of Chemical Methods of Cleaning Gases. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2);16-24. 32 Frontinskiy, A.A. Results of the Work and a Perspective of the Development of the Dzerzhinsk Branch of NIIOGAZ. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2);25-28. 33 Goryachev, I.K. The Semibratovsk Branch of NIIOGAZ and its Contribution to the Development of Techniques for Removing Dust. Prom. Sanit. Ochistka Gazov, Nauch.- Tekh. Sb. 1974(2);29-32. 34 Boev, I.Ya. The Zaporozhsk Branch of NIIOGAZ and its Work. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2):33-36. 35 Pozin, B.M. Scientific Developments at NIIOGAZ and Pro- jected Gas Cleaning Installations in the USSR. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(2):36-40. 36 Rusanov, A.A. The General Aspects of Design and Operation of Gas Purification Systems, in A.A. Rusanov, I.I. Urbakh, and A.P. Anastasiadi, Ochistka Dymovykh Gazov v Promyshlennoy Energetike [Cleaning of Stack Gases in Industrial Power], "Energiya," Moscow, 1969, pp. 5-38. AICE Survey USSR Air Pollution Literature, 16:1-31, 1972. NTIS PB 211466. 37 ------- 37 Anastasiadi, A.P. Principles of Design of Gas Purifica- tion Systems, in A.A. Rusanov, I.I. Urbakh, and A.P. Anastasiadi, Ochistka Dymovykh Gazov v Promyshlennoy Energetike {Cleaning of Stack Gases in Industrial Power], "Energiya," Moscow, 1969, pp. 189-206. AICE Survey USSR Air Pollution Literature .16:32-45, 1972. NTIS PB 211466. 38 Rusanov, A.A. Determination of the Basic Properties of Dusts and Gases, in A.A. Rusanov, I.I. Urbakh, and A.P. Anastasiadi, Ochistka Dymovykh Gazov v Promyshlennoy Energetike [Cleaning of Stack Gases in Industrial Power], "Energiya," Moscow, 1969, pp. 405-440. AICE Survey USSR Air Pollution Literature 16:46-75, 1972. NTIS PB 211466. 39 U.S./USSR Working Group On Stationary Source Air Pollution Control Technology. Development of Methodology and Establishment of Efficiency of Industrial Dust Collection Equipment for Fine Particulate. U.S./USSR Environ- mental Agreement, Project A-4, Task 1, 295 p., Sept. 1974. APTIC No. 70040. 40 Vereshchagin, I.P., V.I. Levitov, G.Z. Mirzabekyan, and M.M. Pashin. Osnovy Elektro-Gazodinamiki Dispersnykh Sistem [Fundamentals of Electrodynamics of Dispersed Systems]. "Energiya," Moscow, 1974. 41 Popkov, V.I. Characteristics of Unipolar Corona With Varying Ion Mobility. Izv. Akad. Nauk SSSR, Energ. Transp. 1975(3):45. 42 Zykov, V.A. Dynamic Method of Determining Ion Mobility in Gases. Nauchn. Tr., Kuban. Cos. Univ. 141:94-101, 1971. Chem. Abstr. 82, 10384. 43 Mirzabekyan, G.Z., and I.N. Grigor'yev. Effect of a Charged Disperse Phase on Corona Discharge Characteristics. Elec- tric Technology U.S.S.R. 1972(3);59-74. 44 Mirzabekyan, G.Z., I.K. Reshidov, V.I. Udalova, I.A. Kizim, and I.N. Grigor'yev. Effect of the Dispersed Phase on the Electric Field of a Corona Discharge in a Plate Electrostatic Precipitator. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1975(5);10-11. Ref. Zh. Khim. 1976, 6183. 45 Mirzabekyan, G.Z., and V.I. Udalova. Measuring the Electric Field of a Corona Discharge With a Dust-Laden Stream. Elektrichestvo 1974(1);5. 38 ------- 46 Rychkov, V.P., and B.P. Volgin. Effect of Free Radicals on the Process of Cleaning Gases. Ogneuporny 1975(9);32-35, Ref. Zh. Khim. 1976f 21662. 47 Avrutskiy, V.A., and V.N. Koshchiyenko. Origin of Ef- fective Electrons During Breakdown in Air. Elektrichestvo 1974(1) :9. 48 Levitov, V.I.f A.G. Lyapin, and E.N. Shevtzov. On Transi- tion of Corona Into the Spark Breakdown. 9th International Conference on Phenomena in Ionized Gases, Bucharest, Rumania, Editura Akademiei Republicii Socialistic Romania 1969;279. Phys. Abstr. 74_, 8525. 49 Bogdanova, N.B., and V.I. Popkov. Corona Discharge Form and the Breakdown of Air Gaps. Electric Technology U.S.S.R. 1973(3);49-64. 50 Kravchenko, V.D., and V.I. Levitov. The Effect of Structure of the Sheath of Negative Corona on Spark- over. Izv. Akad. Nauk SSSR, Energ. Transp. 1966(3);98-101. Eng. Index 1967, 684. 51 Levitov, V.I., and V.M. Tkachenko. The Limiting Electric Parameters of Electrostatic Precipitators. Izv. Akad. Nauk SSSR, Energ. Transp. 1966(1);161-166. APTIC No. 23015. 52 Apukhtina, Ye-G. Similarity of the Breakdown Voltage at Positive Corona. Izv. Akad. Nauk, Energ. Transp. 1971(6);164-167. Eng. Index 1972, 52868. 53 Kolechitskiy, E.S., and N.A. Melikov. Calculation of Initiating Voltage of Electrical Discharge in Air. Elektrichestvo 1973(5);78. 54 Nagornyy, V.V., and I.K. Reshidov. Effect of Transitional Processes in Sparkover in the Corona Gap on the Efficiency and Reliability of Electrostatic Precipitators. Elektrichestvo 1975(11):81. 55 Bazelyan, E.M., V.I. Levitov, and I.G. Pulavskaya. Electrical Discharge in a Multi-Electrode System. Elektrichestvo 1974(5);14. 56 Burgsdorf, V.V., and V.N. Vozlinskiy. Study of Corona Onset Voltage in High-Voltage Structures With Semiconducting Coatings. Electric Technology U.S.S.R. 1973(2):103-109. 39 ------- 57 Babinets, O.L., and Ye.V. Ratnikov. Sputtering of Film Electrode Material at the Negative Corona Point-to- Plane Discharge. Izv. Vyssh. Uchebn. Zaved., Fiz. 18(2):141-142, 1975. Chem. Abstr. 83_, 36405. 58 Avseyevich, O.I., and I.G. Nekrashevich. Electrical Erosion of Binary Alloys of the Copper-Zinc System During Pulsed Discharges. Fiz. Osn. Elektroiskrovoi Obrab. Mater., Akad. Nauk SSSR 1966;109-117. Chem. Abstr. 68, 62209. 59 Rusin, Yu.S. Determination of Corona Initiation Voltage for Electrodes of Complex Shape. Elektrichestvo 1975(5):82. 60 Vereshchagin, I.P. Calculation of Initial Field Intensities for Electrodes of Complex Form. Elektrichestvo 1973(6):22. 61 Levitov, V.I., and V.M. Tkachenko. Electrical Characteristics of Corona Electrodes in Electrostatic Precipitators. Elektricheskaya Ochistka Gazov [Electrical Cleaning of Gases], "Energiya," Moscow, 1968:3-24. 62 Tkachenko, V.M., and A.I. Valuyev. Effectiveness of Operation of Electrostatic Precipitators with Different Types of Corona Electrodes. Elektricheskaya Ochistka Gazov [Electrical Cleaning of Gases], Moscow, "Energiya," 1968:34-40. 63 Levitov, V.I., and V.M. Tkachenko. Electrical Charac- teristics of Certain Types of Corona Electrodes in Electrostatic Precipitators. Izv. Akad. Nauk SSSR, Energ. Transp. 1966(3):91-97. Eng. Index 1967, 605. 64 Levitov, V.I., and V.M. Tkachenko. Effect of the Form of Corona Electrode on the Migration Velocity of Aerosol Particles in Electrostatic Precipitators. Izv. Akad. Nauk SSSR, Energ. Transp. 1966(4);76-80. 65 Reshidov, I.K., and I.V. Yermilov. Electrical Pre- cipitation of Dusts Under Conditions of Reverse Corona. Sb. Dokl., Mezhoblastnogo Seminara Ochistke Gazov [Inter- Regional Seminar on Gas Cleaning], Yaroslavl, 1972;19-23. 66 Levitov, V.I., and V.M. Tkachenko. The Relation Between the Characteristics of Corona Electrodes and the Precipitation Rate of Dust in Electrostatic Precipitators. Elektricheskaya Ochistka Gazov [Electrical Cleaning of Gases], "Energiya," Moscow, 1968:24-33. 40 ------- 67 Mirzabekyan, G.Z.f I.K. Reshidov, I.A. Kizim, V.I. Udalova, and I.N. Grigor'yev. Effect of Dispersed Phase on the Corona Discharge Current in a Plate Electrostatic Precipitator. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1975(4);9-ll. Ref. Zh. Khim. 1975, 231740. 68 Vasyayev, V.I., and I.P. Vereshchagin. Towards Calculating the Characteristics of Homopolar Corona Discharge in a System Consisting of a Row of Conductors Between Planes. Electric Technology USSR 1972(2);84-100. 69 Afanas'yev, V.V., and N.A. Dobryanskaya. Mathematical Model of Development of Initiation Along a Continuous Conductor With Long Air Gaps. Electrichestvo 1975(3);12. 70 Aleksandrov, A.F., V.V. Perebeinos, A.T. Savichev, and I.E. Timofeyev. Initial Stages of Heavy-Current Discharges in Air. Zh. Tekhn. Fiz. 44(11):2414, 1974. 71 Afanas'yev, V.V., and N.A. Dobryanskaya. Stochastic Pro- cesses in the Development of Discharge Over Long Air Gaps. Elektrichestvo 1975(6):35. 72 Popkov, V.I., and S.I. Ryabaya. Distribution of Current of Unipolar Corona at the Non-Corona and Corona Electrodes. Elektrichestvo 1974(11);45. 73 Apukhtina, Ye.G., L.S. Sviridova, and V.V. Danilin. Corona Discharge in Air and in Furnace Gases at Increased Pressures. Elektricheskaya Ochistka Gazov [Electrical Cleaning of Gases], Moscow, "Energiya," 1968:49-69. 74 Apukhtina, Ye.G. Some Peculiarities of Corona Dis- charges at Increased Pressure. Elektrichestvo 1964(11);27-32. Eng. Index 1965, 627. 75 Lyapin, A.G. Ionic Mobility of Hydrogen at Higher Pressure in Unipolar Corona Field. Zh. Tekhn. Fiz. 44(9);1990, 1974. 76 Faynshteyn, E.G. Application of a Method of Linear Pro- gramming for the Calculation of Potential Fields. Elektri- chestvo 1973(10):77. 77 Vereshchagin, I.P., I.V. Zargaryan, and A.V. Semenov. Calculation of Electrostatic Field Between Point and Plane. Elektrichestvo 1974(11):54. 41 ------- 78 Tolmachev, S.T. Calculation of Potential in a Rectangular Spatial System of Spherical Elements Located in a Uniform External Field. Elektrichestvo 1974(10);30. 79 Klenov, G.E. The Potential of Electrostatic Fields at Ring Electrodes. Elektrichestvo 1973(9);85. 80 Yakunin, E.N. Electric Field of a Spherical Electrode Formed by a System of Parallel Toroids. Elektrichestvo 1975(11):45. 81 Netushil, A.V. Model of an Electric Field in a Hetero- geneous Medium of Irregular Structure. Elektrichestvo 1975(10):1. 82 lossel1, Yu.Ya. Electrostatic Field and Volume of Con- ducting Particles, Limited to Three Orthogonal Views of a Sphere. Elektrichestvo 1975(9);89. 83 Kolechitskiy, E.S. Calculation of Electrostatic Fields by the Use of an Integral Equation of the First Order. Elektrichestvo 197j(8) ;21. 84 Lachasvili, R.A. Calculation of Electrostatic Field in Plane Electrooptical Systems, Using First Order Integral Equations. Zh. Tekhn. Fiz. ^6(4):886, 1976. 85 Mayergoyz, I.D. Calculation of the Electrostatic Field by the Method of an Integral Equation of the Second Order. Elektrichestvo 1975(12);11. 86 Tolmachev, S.T. Potential Field in a Periodic System of Interacting Spheroids. Izv. Akad. Nauk SSSR, Energ. Transp. 1975(1):32. 87 Kolechitskiy, Ye.S., and N.A. Melikov. Calculation of the Electrostatic Field Around a Screen With a Complex Shape, Elektrichestvo 1974(2);43. 88 Levintov, S.D., and V.I. Stasyak. Plane Parallel Field of Charging Axis in a Medium With Rectangular Anisotropy. Elektrichestvo 1975(4);82. 89 Knyaz1, A.N. Method of Calculating Meridian Plane Fields With a "Closed" Axis. Elektrichestvo 1974(3);74. 90 Grach, I.M. Relation Between Plane-Meridian and Plane- Parallel Field Strengths on the Axis of Symmetry. Elektrichestvo 1975(5);86. 91 Chatskis, L.G, Study of Static (Electric) Fields. Elektri- chestvo 1973(2):47. 42 ------- 92 Monakhin, L.P., E.K. Yeroshchenkov, and K.N. Ul'yanov. Current-Driven Instability in Molecular Gases. Zh. Tekhn. Fiz. _45 (6) :1346-1348, 1975. 93 Peskov, V.D. lonization Instability in Corona Discharge at High Pressure. Zh. Tekhn. Fiz. 415(12) :2544, 1975. 94 Mirzabekyan, G.Z. Aerosol Charging in a Corona-Discharge Field. Sil'nye Elektr. Polya Tekhnol. Protsessakh (Elektronno-Ionnaya Tekhnologiya) [Strong Electric Fields in Technological Processes (Electron-Ion Technology)], Moscow, "Energiya," 1969:20-38. Chem. Abstr. 7_2, 94395. APTIC No. 494011 95 Babashkin, V.A., A.E. Gonik, I.P. Vereshchagin, and I.V. Yermilov. Experimental Study of the Charging of Micro Particles of Material in the Field of Corona Discharge. Elektrichestvo 1974(2);38. 96 Mirzabekyan, G.Z. Charging of a Conducting Spherical Particle with a Radius of the Order of the Mean Free Path of Ions in Air. Zh. Tekhn. Fiz. _36(7) :1259-1268, 1966. Phys. Abstr. 1^, 5788. 97 Yermilov, I.V. Distribution of the Concentration of Dust in the Field of Corona Discharge in Electrostatic Precipi- tators. Elektrichestvo 1974(7);27-31. 98 Tsaturyan, A.I. On the Limit Concentrations of the Dispersed Phase in Electronionic Apparatus. Elektrichestvo 1972(4);79-81. Phys. Abstr. ^6, 13671. 99 Potekhina, N.D. Calculation of Field and Image Charge of Charged Particles Near a Non-Uniform Surface. Zh. Tekhn. Fiz. _45(10) :2033-2042, 1975. 100 Podol'ski, A.A., V.I. Turubarov, and Ye.I. Pominov. Calculation of the Velocity and Orientation Time of Aerosol Particles in an Electrostatic Field. Kolloidn. Zh. 25(D:63-68, 1973. APTIC No. 50066. 101 Bershev, E.N., and V.V. Kirillov. Statistical Study of Elongated Particle Orientation in an Electrostatic Field. Zh. Tekhn. Fiz. 43(4):791, 1973. 102 Vereshchagin, I.P., and V.S. Morozov. Movement of Aerosol Particles in an Electric Field, with Reynolds Numbers Ex- ceeding Unity. Izv. Akad. Nauk, Energ. Transp. 1973(1):116-121. Eng. Index 1973, 000936. 43 ------- 103 Mirzabekyan, G.Z. Kinetics of Coagulation of Bipolarly Charged Particles. Izv. Akad. Nauk SSSR, Energ. Transp. 1973(3);73-83. Eng. Index 1973, 000937. 104 Kontush, S.M., and V.M. Romanenko. Charge Redistribution on Droplets During Collisions. Adv. Aerosol Phys. 1973(7) -.29-32. Eng. Index 7£, 001315. 105 Vereshchagin, I.P., V.S. Morozov, and M.M. Pashin. Charging of Conductive Aspherical Particles in Corona Fields. Elektrichestvo 1975(2);44-48. 106 Volkov, V.N., and I.A. Krylov. Coalescence and Dispersion of Bipolarly Charged Aerosol. Elektrichestvo, 1972(2);69-72. Eng. Index 72, 000275. 107 Salimov, A.U., M.T. Balabekov, A.M. Bagdasarov, D.G. Mambetov, M.M. Akburov, and Sh.M. Urazbayev. Influence of Intense Electric Fields on Liquid Dispersion in Electro- static Atomizers. Izv. Akad. Nauk UzSSR Ser. Tekh. Nauk 1971(5) ;3-5. Electr. Electron. Abstr. J75, 20253. 108 Burayev, T.K., and I.P. Vereshchagin. Dynamics of Spraying Liquids in an Electric Field. Elektrichestvo 1973(1) ;64-69. Chem. Abstr. 83_, 208001. 109 Salimov, A.U., M.T. Balabekov, Sh.M. Urazbayev, and A.I. Usmanov. Electrical Energy of Individual Droplets and Droplet Systems, With Applications to Electrostatic Atomizers. Izv. Akad. Nauk UzSSR Ser. Tekh. Nauk 1972(4) ;8-ll. Electr. Electron. Abstr. 7_5, 36338. 110 Salimov, A.U., M.T. Balabekov, D.G. Mambetov, M.M. Akbarov, and Sh.M. Urazbayev. Investigating the Values of the Charges of Drops and Their Electrical Energy in the Electrostatic Spraying of Liquids. Izv. Akad. Nauk UzSSR Ser. Tekh. Nauk 1971(6) :8-9. Electr. Electron. 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Fiz. 44^(8) :1781, 1974. 117 Shuster, K.Sh. Process for Removing Aerosol Particles From Gas Streams. USSR Patent 451,452, 1974. Ref. Zh. Khim. 1975, 181588. 118 Mirzabekyan, G.Z., and I.N. Grigor'yev. Efficiency of Collection of Particles in a Tubular Electrostatic Precipitator. Tr. Mosk. Energ. In-ta 1975(224);67-71. Ref. Zh. Khim. 1975, 191774. 119 Vereshchagin, I.P., V.A. Zhukov, and V.S. Morozov. Orientation of Prolate Ellipsoid Particles Moving in an Electric Field. Elektrichestvo 1975(5) ;34. 120 Dunskiy, V.F., and K.A. Krishtof. Deposition of Unipolarly Charged Aerosols on Conductors and Dielectrics. Colloid J. (USSR) 32,(5) :578-583, 1970. APTIC No. 29370. 121 Dunskiy, V.F., and K.A. Krishtof. Precipitation of Uni- polar Charged Aerosol Particles by an Array of Earthed Conductors. Zh. Prikl. Mekh. Tekh. Fiz. 1970(5);179-183. Phys. Abstr. 7£, 10919. 122 Yermilov, I.V. Efficiency Evaluation of Fly Ash Electro- static Precipitators. 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Influence of Electric Wind and Gas Humidi- ty on the Efficiency of Particle Collection in an Electro- static Precipitator. Zh. Prikl. Khim. 41(9):1853-1859, 1968. APTIC No. 57567. 157 Chander, Yu.I., S.Z. Belinskiy, L.G. Borisovskiy, I.S. Shevalenko, L.P. Kudryavtsev, and V.F. Filipov. Chemical Treatment of Dust-Laden Gases. USSR Patent 368,872, 1973. Chem. Abstr. T3_, 9437. 158 Rychkov, V.P., and L.A. Zhestkov. Increase in the Operating Efficiency of Electrostatic Precipitators. Energetik 1971(6);17-18. APTIC No. 37475. 159 Chander, Yu.I., S.Z. Belinskiy, L.G. Borisovskiy, N.S. Yeremenko, L.P. Kudryavtsev, and V.F. Filipov. Removal of Dust From Gases With Electrostatic Precipitators. USSR Patent 339,313, 1972. Chem. Abstr. 77, 77342. 160 Olesov, N.A. Removal of Dust From Gases in Electrostatic Precipitators. USSR Patent 267,590, 1970. Chem. Abstr. 73, 68062. 161 Levitov, V.I., I.K. Reshidov, and I.A. Kizim. 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U.S./USSR Working Group on Stationary Source Air Pollution Control Technology Task A-5, April, 1975. 171 Meshcheryakov, V.B., and A.I. Zav'yalov. Improved Collection Electrode in Electrostatic Precipitators. Sb. Prom. Ochistka Gazov Aerogidrodinamike Pyleulavlivayushchikh Apparatov, Yaroslavl, 1975;93-97. Ref. Zh. Khim. 1976, 11633. 172 Yanovskiy, L.P., Ye.I. Byalik, and Ya.I. Belkin. Electro- static Precipitator Collection Electrodes: Control of the Rapping Conditions. Energetik 1972(11):18-19. APTIC No. 48881. ' 173 Asyutin, A.V. Increasing the Degree of Gas Cleaning and Service Life of Electrostatic Precipitators with the Aid of Rapping Regimes. Sb. Dokl. Mezhoblastnogo Seminara Ochistke Gazov [Inter-Regional Seminar on Gas Cleaning], Yaroslavl, 1972:7-10. 174 Zav'yalov, A.I., and V.B. Meshcheryakov. Studying Dust Rapping Prom the Precipitator Electrodes of Dry Type, Soviet Built, Industrial Electrostatic Precipi- tators. U.S./USSR Working Group on Stationary Source Air Pollution Control Technology Task A-5, March 1975. 50 ------- 175 Sanayev, Yu.I., and I.K. Reshidov. Study of Dust Re- entrainment Phenomena and Their Influence on Efficiency of Industrial Electrostatic Precipitators. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(1):l-5. APTIC No. 75289. 176 Sanayev, Yu.I. Methods for Reducing Secondary Entrainment of Dusts in Electrostatic Precipitators. Sb. Prom. Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh Apparatov, Yaroslavl, 1975;77-85. Ref. Zh. Khim. 1976, 11632. 177 Materials from the Study of the Physical Mechanism of Dust Reentrainment During Rapping Obtained With the Aid of High Speed Photography. Semibratov Branch, NIIOGAZ. U.S./USSR Working Group on Stationary Source Air Pollution Control Technology Task A-5, 1975. 178 Savrayev, V.P., and K.Ye. Savrayeva. Basic Factors Influencing the Efficiency of the Collection Electrode of an Electrostatic Precipitator in Removing Dust. 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Elektri- chestvo 1974(6);25-30. APTIC No. 70238. 194 Mirzabekyan, G.Z., and I. Grigor'yev. Equations for Kinetic Charging and Deposition of Particles in Electrostatic Precipitators Taking Into Account Turbulent Mixing of Aerosols. Izv. Akad. Nauk SSSR, Energ. Transp. 1975(2):54. 52 ------- 195 Padva, Y.Yu. The Distribution of Aerosol Concentrations in a Turbulent Gas Stream. Vodosnabzh. Sanit. Tekhn. 1971(8);25-28. APTICNo. 35329. 196 Korotov, Ye.I. Determination of Added Air in Dust System. Elektr. Stantsii 1973 (3);76. 197 Zalogin, N.G., and R.G. Kit. Problems of Developing Com- bined Fly Ash-Bottom Ash Removal Systems for High-Capacity Power Stations. Thermal Eng. .18 (11) : 71-77, 1971. 198 Vishnevskiy, T.S., and V.M. Kovetskiy. Optimal System for Pneumatic Separation and Transport of Dry Ash. Elektr. Stantsii 1974(2);20-21. 199 Kit, R.G., and N.G. Zalogin. Ways to Improve the Efficiency of Ash Removal. Teploenergetika _20(8) :53, 1973. 200 Lozhkov, E.F. The Most Advantageous Operational Modes of Hydroelevators in Hydraulic Ash Sluicing Systems. Thermal Eng. 18(11):78-82, 1971. 201 Chekanov, G.S. Removing Ash From the Bins of Ash Collectors. Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976;51-54. 202 Kuts, A.R. Mechanisms of Dust Removal. Energetik 1973(6);20. 203 Krayzel1, S.E., and I.V. Raspopov. Removal of Ash With an Air Pipe in Medium Sized Power Plants. Elektr. Stantsii 1973(1):74. 204 Ots, A.A., Tallermo, Kh.I. and Tomann, E.L. Influence of Initial Ash Deposits on High Temperature Corrosion of Boiler Steels. Thermal Eng. 19(1):24-28, 1972. 205 Rastorguyev, V.P., and L.S. Ryzhov. Electrostatic Precipitator. USSR Patent 421,370, 1974. Ref. Zh. Khim. 1975, 5R93. 206 Lozinskiy, R.P. Tests of Ash-Collecting Devices at Thermal Electric Power Plants. Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976:55-61. 53 ------- 207 Akbrut, A.I. The Organization of the Assembly and Repair of Ash-Collecting Equipment at Electric Power Plants. Presented at the Joint Soviet-American Symposium on Methods to Reduce Solid Emissions from Thermal Electric Power Plants, Yaroslavl, 1976;62-68. 208 Kolosov, B.A. Industrial Utilization of Ash From Thermal Electric Power Plants in Construction. Elektr. Stantsii 1973(10):67-8. 209 Vdovchenko, V.S., I.Ya. Zalkind, V.F. Mirachev, D.G. Yaroshenko, and L.A. Proshina. Properties of Ash From Thermal Electric Power Plants and Trends in its Utiliza- tion. U.S./USSR Working Group on Stationary Source Air Pollution Control Technology, Program A-5. 210 Inyushkin, N.V., N.I. Polyakova, and M.M. Yakovenko. Laboratory Experiments on a 3-Field Tubular Electrostatic Precipitator. Tr. Tsentr. N.-I. Proyekt.-Konstrukt. In-ta Profilakt. 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Abstr. 7_3, 58409. 237 Khomutinnikov, P.S., and I.I. Shipulin. Electrostatic Precipitation of Dust in Open-Hearth Furnaces. Metallurg 1971(4):19-22. APTIC No. 45376. 56 ------- 238 Apukhtina, Ye-G., and V.V. Danilin. Electrical Cleaning of Gases from Martin Open-Hearth Furnaces in Which Oxygen is Blown. Elektricheskaya Ochistka Gazov [Electrical Cleaning of Gases], Moscow, "Energiya," 1968;93-100. 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. Nauch.-Issled. Proyekt. Inst. Ochistke Tekhnol. Gazov, Stochnykh Vod Ispol'z. Vtorichnykh Energore- sursov Predpr. Chern. Met. 1972(15):22-25. Chem. Abstr. 130, 136906. 240 Teplitskiy, M.G., and G.I. Guzhov. Cleaning of Gases From Martin Open-Hearth Furnaces at the Cherepovets Metallurgical Plant. Sb. 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Ktitorov, M.N. Balamut, and L.P. Gilyazetdinov. Electrostatic Precipitation of a Two-Component Carbon Black-Ash Aerosol. Fiz. Aerodispersnykh Sist. 1974(10):26-28. Chem. Abstr. 83., 62761. 251 Val'dberg, A.Yu., L.L. Nabutovskaya, and G.M. Aliyev. Collecting Carbon Black During the Production of Acetylene by the Thermooxidative Pyrolysis of Methane. Khim. Prom. 4j3(4) :258-260, 1972. Chem. Abstr. 16, 156378. 252 Lagutin, Yu.V., and V.V. Shul'ga. Some Experiences with Electrostatic Precipitators. Tsement 14.(7) :16-17, 1972. APTIC No. 46877. 253 Belinskiy, S.Z., Yu.I. Chander, V.A. Konovalova, and Z.G. Palamarchuk. Application of Electric Filters for Catching Dust in Fire-Brick Production. Stal1 1970(10);956. APTIC No. 28313. 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. 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APTIC No. 46868. 315 Tarat, E.Ya., V.S. Burkat, and V.S. Dudorova. Dust Collection in an Apparatus With a Sprayed Fluidized Spherical Column. Zh. Prikl. Khim. 4j5(5) :1133, 1973. 316 Val'dberg, A.Yu. Effect of Energy Losses on the Efficiency of Wet Dust Collecting in a Turbulent Scrubber. Zh. Prikl. Khim. £5(7):1623-1625, 1972. Chem. Abstr. 7§, 5880. 317 Akbrut, A.I., and L.I. Kropp. Determination of the Average Droplet Size for the Design of Ash Catching Equipment Provided With Venturi Tubes. Teploenergetika 1972(4);81-83. APTIC No. 40628. 318 Chulakov, P.Ch., and U.B. Baytasov. Efficiency of Dust- Wetting Agents in Air Dust Removal. Izv. Vyssh. Uchebn. Zaved. Corn. Zh. (Sverdlovsk) 13(6):66-68, 1970. APTIC No. 35447 and APTIC No. 33175. 64 ------- 319 Kropp, L.I., and A.I. Akbrut. Working Processes and Cal- culation of the Efficiency of a Scrubber With a Venturi Tube. Thermal Eng. _19(7) :90-96, 1972. 320 Kunina, E.M., and M.I. Kheifets. Time-Lag Coagulation in Venturi Tubes. Khim. 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Abstr. 8£, 40648. 326 Reznichenko, I.G., Yu.P. Pavlenko, A.V. Ul'yanov, V.V. Gubachev, A.N. Yasinskiy, and S.I. Bruk. High Pressure Ejection Venturi Tubes. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974(5);l-4. Ref. Zh. Khim. 1975, 21682. 327 Torf, A.I., and V.F. Maksimov. Design Calculation of a Jet Scrubber for Removing Dust Particles from Flue Gases From Lime-Regenerating Kilns. Tr. Leningrad. Tekhnol. Inst. Tsellyul.-Bum. Prom. 1972(28);96-100. Chem. Abstr. 79, 139472. 328 Kunina, E.M., and M.I. Kheifets. On the Problem of the Atomization of a Liquid by a High-Velocity Gas Stream. Inzh.-Fiz. Zh. 19(1):116-119, 1970. APTIC No. 34839. 65 ------- 329 Lebedyuk, G.K., V.N. Alimov, and Yu.V. Kovalevskiy. Industrial Use of Gas-Liquid Contactors With Self- Wetted Venturi Tubes. Khim. Prom. 48(11);861-863, 1972. Chem. Abstr. 7J3, 138255. 330 Kanenko, G.M., and B.P. Slavutskiy. Hydraulic Resis- tance of a Venturi Tube With Irrigation of the Diffuser. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1975(5);8-9. Ref. Zh. Khim. 1976, 6171. 331 Litvinov, A.T., and R.A. Burtseva. Calculation of the Optimal Sizes of Injectors, Specific Density of Flooding, and Location of a Sprayer. Zh. Prikl. Khim. 47(1):131r 1974. 332 Maksimov, G.V., and L.M. Isyanov. Effect of the Extent of Enlargement of the Diffuser on the Hydraulic Resistance of a Venturi Tube. Sb. Okhr. Okruzhayushchey Sredy Zagryaz. Prom. Vybrosami, Leningrad, 1975;171-176. Ref. Zh. Khim. 1976, 6172. 333 Tkachuk, A.Ya., and L.I. Yeshchenko. Intensification of Dust Removal Process in a Turbulent Scrubber. Tr. N.-I. Proyekt. In-t Gazoochist. Sooruzh., Tekhn. Bezopasn. Okhrane Tr. Prom-sti Stroit. Mater. 1974(9);35-42. Ref. Zh. Khim. 1975, 121746. 334 Nedoborov, Yu.P., L.A. Degtyareva, and B.V. Nekrosov. Effect of Viscosity of Spraying Liquid oh the Resistance of Apparatus With a Jetless Venturi Pipe. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1974. 335 Lagunov, A.S., L.P. 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Khim. 1975, 21686. 340 Val'dberg, A.Yu., L.L. Nabutovskaya, and E.Ya. Tarat. Heat Transfer Processes in Scrubbers with Various Types of Packing. Kratk. Soobshch. Nauchno-Tekh. Konf., Leningr. Tekhnol. Inst. im. Lensoveta, Podsekts. Protsessov Appar. Khim. Tekhnol. 1972:44-45. Chem. Abstr. 83, 99966. 341 Yermolayev, V.N. Study of the Heat Exchange Process Occur- ring Under High Pressure Conditions in Scrubbers. Stal1 1972;769-771. APTIC No. 56384. 342 Dergachev, N.F., and M.S. Khar'kovskiy. Prevention of Deposit Formation in Scrubbers. Teploenergetika 18J2):70-75, 1971. APTIC No. 35945. 343 Lebedev, V.D., V.E. Maslov, and K.A. Lunegov. Gas Puri- fication in Centrifugal Scrubbers. Teploenergetika 12(5):40-41, 1972. Chem. Abstr. 77, 50679. 344 Novikov, A.I., A.N. Skvortsov, and V.A. Kishkarev. Conical Scrubbers With Fluidized Bed Spherical Packing for the Scrubbing of Gases. Khim. Prom. 1974(11) ;846-849. Chem. Abstr. 8_2, 60847. APTIC No. 73569. 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 With a Disk Liquid Atomizer. Inzh.-Fiz. Zh. 2£(1):147-148, 1975. Chem. Abstr. 83, 81959. 347 Gertseva, M.I., and N.S. Kirsanova. Effect of Factors on the Efficiency of Dust Removal in a Scrubber with Impact Action. Nauch. Tr. Nil Tsvet. Met. 1975(36):112-118. Ref. Zh. Khim. 1976, 61700. 67 ------- 348 Alekseyev, N.I., E.Ya. Tarat, and V.N. Isayev. Foam Vortex Apparatus for Wet Treatment of Gases. Khim. Neft. Mashinostr. 1975(10);18-20. Ref. Zh. Khim. 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. 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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 ------- 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. 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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 ------- 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. 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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^, 114877. 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 Filters at Small Peclet Numbers. Kolloidn. Zh. 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", 1975(3);20-21. Ref. Zh. Khim. 1976, 51838. 397 Kirsh, A.A., and I.E. Stechkina. Flow Field and Dif- fusion Precipitation of Aerosols in a Simple Model of a Polydispersed Fiber Filter. Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza 1973(4):149-155. Chem. Abstr. 81, 15065. — 72 ------- 398 Kirsh, A.A., I.E. Stechkina, and N.A. Fuchs. Effect of Gas Slip on the Pressure Drop in a System of Parallel Cylinders at Small Reynolds Numbers. J. Colloid Interface Sci. 37(2):458-461, 1971. Phys. Abstr. 75, 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. 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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 ------- 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 ------- 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. 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Small-Clearance Self-Cleaning FTR Filters for Mist Collection. Intern. Chem. Eng. 14(1):140-141, 1974. APTIC No. 58313. 79 ------- 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 ------- 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. 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Khim. 1975, 191710. 498 Matsnev, V.V., A.M. Belevitskiy, V.A. Reznik, and G.G. Rutenberg. Construction of An Improved Direct Flow Cyclone. Prom. Sanit. Ochistka Gazov, Nauch.-Tekh. Sb. 1975(3);l-3. Ref. Zh. Khim. 1975, 191704. 499 Pervov, A.A., A.D. Mal'gin, and Ye.I. Pavlovskiy. Cyclone Separators for Cleaning Dust From Air. Proceedings, Con- ference on Industrial Cleaning of Gases, Yaroslavl, 1969. 82 ------- 500 Bakv'M'«-^'M- Ravik°vich, A.I. Sharov, V.D. Bakay, Ye.M. Britvin, and M.P, Polikarkin. Multi- 5?? ?5f f?r Removin9 Dust From Gases. USSR Patent 453,194, 1975. Ref. Zh. Khim. 1976, 11599. 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 and Operation of Cyclone Batteries. Energetik 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 Power Plant. Sb. Prom. Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh Apparatov, Yaroslavl, 1975:31-33. Ref. Zh. Khim. 1975, 12R102. 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 Catchers. Koks Khim. 1968(5);8-12. APTIC No. 58056. 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. 1975, 31764. 510 Ryabchikov, S.Ya. Cleaning of Gases in Catalytic Cracking Plants. Sb. Dokl., Mezhoblastnogo Seminara Ochistke Gazov [Inter-Regional Seminar on Gas Cleaning], Yaroslavl, 1972;95-101. 83 ------- 511 Ryabchikova, S.Ya., B.K. Amerik, D.T. Karpukhovich, and L.N. Gusev. Dust Collecting System of Fluidized-Bed Apparatus. Khim. Tekhnol. Topi. Masel 1975(2):32-35. Chem. Abstr. 83, 62474. 512 Mal'gin, A.D., and A.A. Pervov. Use of the BTsRN-150 Fly Ash Collector. Energetik 1973(10);10. 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., Mezhoblastnogo Seminara Ochistke Gazov [Inter-Regional Seminar on Gas Cleaning], Yaroslavl, 1974;64-70. 515 Volkov, Ye-V., and S.M. Suslov. Aerodynamic Resistance of a Cyclone Chamber With a Circulating Solid Dispersed Phase. Tr. Ural'sk Politekhn. In-ta Sb. 1974(227) .-58-60. Ref. Zh. Khim. 1975, 2176. 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, "Mashinostroyeniye," 1974:171-177. Ref. Zh. Khim. 1975, 31756. 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. Ochistka Prom. Gazov, Moscow, "Mashinostroyeniye," 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 Cyclones. Nauch. Tr. N.-I. i Proyekt. In-t Redkomet. Prom-sti 1974(62) :3-12. Ref. Zh. Khim. 1975, 151706. 84 ------- 521 Sherstyuk, A.N. Approximate Determination of Velocities Cascades. Thermal Eng. 19(6):74-76, ~~ 522 Ushakov, S.G., and Yu.N. Muromkiy. Improving the First Stage of Separation of a Centrifugal Dust Separator. Sb. Tezisy Dokl. Itog. Nauch.-Tekhn. Konf. Ivanov. Energ. In-t, Ivanovo 197 5; 29. Ref. Zh. Khim. 1975f 7R129. 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 B.I. Litovkin. Results of Industrial Tests with a Battery of Cyclones BTsRN-150 at Yaroslavl Thermal Electric Plant 2. Sb. Prom. Ochistka Gazov Aerogidro- dinamika Pyleulavlivayushchikh Apparatov. Yaroslavl, 1975; 31-33. Ref. Zh. Khim. 1976, 41674. 525 Mai 'gin, A.D., and G.A. Rumyantsev. Regeneration of a Saturated Layer in a Filter-Cyclone and Construction of Apparatus. Sb. Prom. Ochistka Gazov Aerogidrodinamika Pyleulavlivayushchikh Apparatov. Yaroslavl, 1975:99-106. Ref. Zh. Khim. 1976 , 41732. 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 Source Air Pollution Control Technology Project A-4. APTIC No. 75292. 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. Ochistka Prom. Gazov, Moscow, "Mashinostroyeniye," 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 Particles. Mekhan. Ochistka Prom. Gazov, Moscow, "Mashinostroyeniye," 1974:26-29. Ref. Zh. Khim. 1975, 31757. 85 ------- 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. Proyekt. In-t Gazoochist. Sooruzh., Tekhn., Bezopasn. Ohkhrane Tr. Prom-sti Stroit. Mater. 1974(9);11-17. Ref. Zh. Khim. 1975, 121799. 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 ------- 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 ------- 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 Filtration Method. Khim. Prom. 1972(12):925-926. Chem. Abstr. 78, 61812. 558 Cheriyayeva, G.A., and B.F. Sadovskiy. Application of FP Fibers for Sampling and Electron Microscopy of Highly 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 Dokl. Vil'nys, 1974;139. Ref. Zh. Khim. 1975, 11800. 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 ------- 563 Shkatov, Ye.F., v.S. Matruchenko, and Ye.V. Shatayeva. SU1Pment With Aut<™atic Stabilization of = * ameters Of Dust-Gas Mixtures. Sb. Mekhan. n ?£?"• Gazov' Moscow, "Mashinostroyeniye," : 220-234. Ref. zh. Khim. 1975, 31752. 564 aA S'P" and L-M' Levin. Experimental Study of the ?Pioatlon Process- Tr. Inst. Eksp. Meteorol. : 3-33. APTIC No. 40711. 565 Kopylov, V.p. Designing Tape Feed Mechanism for Frame Type Aerosol Samplers. Tr. Eksp. Issled. Fiz. Obalkov Prib. 1(33) :131-136, 1972. APTIC No. 51873. 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 of Electrification of Aerosols. Vestn. Tekhn. Ekon. Inform. Nauch. -Issled. Inst. Tekhn. -Ekon. Issled. Cos. Kom. Sov. Min. SSSR Khim. 1962 (6) : 52-53. Chem. Abstr. 60, 201. - 568 Yankovskiy, S.S., and N.G. Bulgakova. Graphical Method of Determination of the Fractional Effectiveness of Cyclones and the Dispersivity of Dust. Teor. Osnovy Khim. Tekhnol. 5(4) :615-616, 1971. APTIC No. 33787. 569 Yankovskiy, S.S., and N.A. Fuks. Particle Size Analysis of Industrial Aerosols According to Their Stokes1 Diameters, 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, PB 235829/9WP. 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 ------- 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 Aerosols in a Stream. Sb. Naukn. Tr. Cos. Nauch.-Issled. Inst. Tsvetn. Metall. 1962(19):577-591. Chem. Abstr. 59, 11048. 580 Pashin, M.M. Method of Registering the Movement of Aerosol Particles. Sil'nye Elektr. Polya Tekhnol. Protessakh (Elektronno-Ionnaya Tekhnologiya) [Strong Electrical Fields in Technological Processes (Electron- Ion Technology)] Moscow, "Energiya", 1, 1969. 581 Ivanova, A.P., S.V. Kolerskiy, I.I. Kravchenko, S.O. Lekhtmakher, V.I. Rodionov, and L.S. Ruzer. Device for the Generation and Study of Aerosols in the Range of 5 x 10~7-10~5 cm. Izmer. Tekh. 1974(4):74-76. Chem. Abstr. £2, 74889. 582 Kal'nin, Yu.V., and A.V. Illarionov. Production of Model Aerosols from Solution. Tr. Tsentr. N.-I. Proyekt.-Konstrukt. In-ta Profilakt. Pnevmokoniozov Tekhn. Bezopasn. 1974(10);21-23. Ref. Zh. Khim. 1975, 1711688. 90 ------- 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 ------- 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 ------- 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 ------- |