United States
          Environmental Protection
          Agency
 Office of Air Quality
 Planning and Standards
 Research Triangle Park NC 27711
EPA 450/3-90-003
July 1990
           Air
®EPA    ASPEN EXPERT SYSTEM FOR
          STEAM STRIPPING CALCULATIONS
          control
technology center

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                                          EPA-450/3-90-003
   ASPEN EXPERT SYSTEM FOR
STEAM STRIPPING CALCULATIONS
    CONTROL TECHNOLOGY CENTER

            SPONSORED BY:
         Emission Standards Division
   Office of Air Quality Planning and Standards
      US. Environmental Protection Agency
       Research Triangle Park, NC 27711
 Air and Energy Engineering Research Laboratory
       Office of Research and Development
      US. Environmental Protection Agency
       Research Triangle Park, NC 27711
  Center for Environmental Research Information
       Office of Research and Development
      US. Environmental Protection Agency
           Cincinnati, OH 45268
                July, 1990

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                                           EPA-50/3-90-003
   ASPEN EXPERT SYSTEM FOR
STEAM STRIPPING CALCULATIONS
               Tony Rogers
               Ashok Damle
          Research Triangle Institute
              P.O. Box 12194
  Research Triangle Park, North Carolina 27709
        EPA Contract No. 68-02-4326
              Project Officer
             Penny E. Lassiter
        Emission Standards Division
 Office of Air Quality Planning and Standards
    U.S. Environmental Protection Agency
 Research Triangle Park, North Carolina 27711
               Prepared fon
         Control Technology Center
    U.S. Environmental Protection Agency
 Research Triangle Park, North Carolina 27711

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                             ACKNOWLEDGEMENT
The  ASPEN Expert System for Steam  Stripping  Calculations was prepared for  EPA's Control
Technology Center (CTC)  by T. Rogers and A. Damle of Research Triangle Institute.  The project
officer was Penny Lassiter of the EPA's Office of Air Quality Planning and Standards (OAQPS).  Also
participating on  the project team were  Bob Blaszczak, OAQPS and Chuck Darvin, Air and Energy
Engineering Research Laboratory (AEERL).

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                                        PREFACE
          The development of the ASPEN steam stripper model was funded as a cooperative project by
EPA's Control Technology Center (CTC) and EPA's Office of Air Quality Planning and Standards
(OAQPS).

          The CTC was established by EPA's Office of Research and Development (ORD) and OAQPS
to provide technical assistance  to State  and  Local  air pollution control agencies.   Three levels of
assistance can be accessed through the CTC.  First, a CTC HOTLINE has been established to provide
telephone assistance on matters relating to air pollution control technology.  Second* more in-depth
engineering assistance can be provided when appropriate.  Third, the CTC can provide technical guidance
through publication  of technical guidance documents, development of personal computer software, and
presentation of workshops on control technology matters.

          The technical guidance projects, such as this one, focus on  topics of national or  regional
interest that are identified through contact with State and Local agencies. In this case,  the CTC became
interested in developing an easy-to-use computer model of a steam stripping column equipped with an
appropriate air emission control  device.  An ASPEN "expert system" was the result of this effort, and it
requires no knowledge  of programming to use. This document leads the reader, step-by-step, through
the design and cost estimation procedures in the ASPEN steam stripper model.

          OAQPS  is developing  guidance  on controlling emissions from  wastewater handling and
treatment.  Steam stripping the wastewater is the technology under consideration.  However, evaluating
the feasibility  of  using a steam  stripper can be  tedious.  Therefore, OAQPS and  the CTC have
coordinated this effort  to  provide State  and Regional EPA personnel with a  tool for quickly and easily
evaluating steam strippers.

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                              TABLE OF CONTENTS'
Section
1.0                   INTRODUCTION	1-5
       1.1            Aspen Steam Stripper Model	.-.	1
       1.2            Model Assumptions	2
       13            Emission Control Options..		4
       1.4            Physical Properties	.5

2.0                   ASPEN "EXPERT SYSTEM"	7-14
       2.1            Overview	7
       2.2            Interactive Front-End Program	7
       2.3            Installation and Start-Up Procedures	9
       2.4            Entering Information	10
       2.5            Creating a Custom ASPEN Input File	13

3.0                   USING ASPEN ON THE VAX	15-24
       3.1            Setting Up A User Account	15
       3.2            Accessing the VAX Using Personal Computers	17
       33            Running the Aspen Program on the VAX	19

4.0                   SIMULATION RESULTS	25-27
       4.1            Cost Calculations	25
       4.2            Report Output 	25

5.0                   REFERENCES	28

       APPENDIX A  A Sample Case Study	Al

       APPENDIX B  Sample Form N258 - EPA ADP IBM, LMF, & VAX
                     Account and User Registration	:	A2

       APPENDIX C  Example of Communication Parameters Setting •
                     on Crosstalk Status Screen	A3

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                                 LIST OF FIGURES


Number                                                               Page

   1      Run Procedure for ASPEN Steam Stripper Model..—.	8

   2      Main Menu for ASPEN "Expert System" Program	11

   3      "Component Selection/Properties" Screen	12

   4      Chemical Selection Menu in Front-End Program	14

   5      Example of the Port Selection Menu	18

   6      Example of Login Screen and On-Screen Bulletin
          onNCCVAX	20

   7      Cost Assumptions in the ASPEN Steam Stripping Model	26

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                               LIST OF TABLES
Number                                                           Page
   1     Regional ADP Coordinators	16

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                                  1.O  INTRODUCTION
1.1      ASPEN STEAM STRIPPER MODEL

        The ASPEN process simulation software, VAX/VMS version 7.0, is available to EPA/OAQPS
for  evaluating the performance and cost of waste  treatment  processes.   ASPEN is an acronym
representing "Advanced System for  Process ENgineering," a software package designed to aid in
engineering calculations. A number of features make ASPEN suitable  for modeling waste treatment
systems: (1) modular construction of flowsheets; (2) built-in thermodynamic routines; and (3) ability to
add user models developed for specific applications.  Material and energy balance results are used by
ASPEN to size and cost the major pieces of process equipment and calculate the utility and operating
costs.  The user has  the choice of a "grass-roots" design (design mode) or a simulation that rates an
existing process under new operating conditions (rating mode).

         Using these features, an ASPEN model of a steam stripper has been developed.  A schematic of
the process is shown in Appendix A.  In addition  to  the tower,  the stripper system consists of waste
storage tanks and other vessels, a feed preheater, and a primary water-cooled condenser for the overhead
vapor leaving the stripper.

         The overhead product  from the steam stripper is condensed and decanted, with the aqueous
condensate routed back to the  waste storage tanks.  This is done to  meet the general objective of
discharging only "clean" residuals from the battery limits of the process.  Recovered organics are either
recycled, reused, or incinerated.  The treated bottoms from the  steam  stripper is relatively clean hot
water. It is used to preheat the waste feed to the stripper in a heat exchanger and is then discharged.

         Additional  unit operations  (e.g., catalytic  oxidation, vapor-phase carbon adsorption,  and
condensation) can be selected by the user for optional control of vapor emissions from the primary
condenser.  Simulations with no control option are also possible. Dilute aqueous wastes containing up to
20 chemicals can currently be represented by the ASPEN model.

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12       MODEL ASSUMPTIONS. -   .,i-^; .

         A vertical packed column is a simple device consisting of a cylindrical shell containing a
support plate for the packing material and a liquid- distributing device designed to provide effective
irrigation of  the packing.  Steam strippers commonly have  more than one equilibrium stage for
vapor/liquid mass transfer (Reference 1). The wastewater enters at the top of the column and flows by
gravity countercurrent to the steam.  As the wastewater passes down through the column, it contacts
rising vapors that contain progressively less of the volatile organics compounds.

         Stripping occurs because the dissolved organics in the wastewater tend to vaporize into the
steam until their vapor and liquid concentrations reach thermodynamic equilibrium.  For aqueous
mixtures of volatile organics, the distribution of a pollutant between the vapor phase and water can be
described adequately by Henry's Law (Reference V).

         The major parameters affecting a steam stripper performance are the Henry's law constant
for each VOC, the liquid loading rate, and the steam to liquid  ratio.  The steam and liquid loading
rates and various physical properties affect the mass transfer coefficients for each VOC, whereas, the
Henry's law constant affect the concentration driving force for each of the VOC. The height of a steam
stripper is designed for a certain desired VOC removal efficiency and the column diameter is designed
from flooding correlations to provide a desired pressure drop. In the ASPEN steam stripper model a
pressure drop of 0.5 in - H2O/ft [0.41 kPa/m] of packing (1"  stainless steel saddles random dumped
packing) is assumed for column  design calculations.

         In addition to the above specifications, a number of engineering assumptions were used in
the tower design:

         •       Operating pressure of 1 atmosphere     	
         •       Isothermal column operation
         •       Constant molal overflow (one mole of aqueous phase vaporized
                for each mole of steam condensed)
         •       Linear equilibrium and operating equations

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         The assumption of linear equilibrium implies that Henry's Law is valid for each volatile
organic at the concentrations encountered, in the stripping column.  Air-water Henry's law constants at
25 °C are a part of the database for the ASPEN steam stripper model.  These are extrapolated to the
column operating temperature using the Clausius-Clapeyron relationship (Reference 2).

         The mass transfer model of Onda et al. (Reference  3) is used in the ASPEN model to
calculate an overall liquid-phase mass transfer coefficient. This coefficient is needed to determine the
column height and/or desired removal efficiency.  The overall mass transfer coefficient is based on the
two- resistance theory, which states that the total resistance to interphase mass transfer is the sum of a
gas-phase and a liquid-phase  resistance. Physically, Kj^a  may  be thought of as a  first-order rate
constant (based on the liquid-  phase driving force) which is the  product of an overall coefficient, KL
(m/min), times the specific interfacial mass transfer area, a (m  ).

         The steam stripper model predicts the packing height, Zj,  in terms of the operating
parameters and the VOC percent removal:

                ZT  = (L/KLa)  •
                         HTU                  NTU

Where:

         E =   VOC removal efficiency expressed as a percentage,
                                3           2
         L =   liquid loading, (m  of liquid)/m /min,
         KLa = overall mass transfer coefficient, min
         R =   "stripping factor", the operating volumetric G/L ratio
                divided by the minimum G/L ratio required for 100
                percent removal in an ideal column,
         HTU = height of a transfer unit, m,
         NTU = number of transfer units.
                                             • 3-

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         The ASPEN steam stripper model allows a user a packed or tray column option in both
rating and design modes. In the design mode, auser needs torspecify_a:design^VO.G,component: and s.
its target removal efficiency.  -   .: -

         In a tray column simulation mode  Kremser .equations..are: used..to ^relate  number  of —
theoretical trays to the VOC removal efficiency .(Reference 4).  A murphree efficiency of 0.& is used to
determine the actual number of trays from theoretical number of trays.  When a simulation  run is
made in packed colum mode the simulation results also provide  an equivalent number of trays
required to achieve the same degree of removal of the design component.  Likewise, an equivalent
packing height is calculated for a tray column simulation mode.

1.3       EMISSION CONTROL OPTIONS

          Three air emission control  technologies  are  available to the user  in the ASPEN steam
stripping model: refrigerated condensation (referred to as a secondary condenser), catalytic oxidation,
and fixed-bed carbon adsorption. The secondary condenser treats the vapor stream leaving the primary,
water- cooled condenser, and it consists of a shell-and-tube heat exchanger equipped with a brine chiller
unit.  Catalytic  oxidation is  a low-temperature (approximately  1100°F) incineration unit  that uses
methane as an auxiliary fuel to maintain the combustion temperature for dilute organic vapors.  Because
no carbon adsorption model currently exists in the ASPEN library, it was necessary to develop and install
a user model for such calculations.

          The ASPEN carbon  adsorption model is  based  on  a  Polanyi-type "universal isotherm"
developed by Calgon Corporation to estimate equilibrium capacities  for various carbon adsorbents.  For
a given  type of carbon, in this case a Calgon BPL (4 x 10 mesh), a single measured isotherm for n-butane
serves as a reference for predicting the equilibrium  capacity of any chemical on that same adsorbent.
This reference isotherm is called the characteristic curve for the adsorbent, and its theoretical relationship
to the "adsorption potential" of the adsorbate is well  established (Reference 5).  By accounting  for a
chemical's adsorbed (liquid) density and polarizability, its isotherm can be predicted from the adsorbent's
characteristic curve without experimental data.

          Assumptions in the carbon bed-user model .include: (l)-additivity of the equilibrium capacities
of the challenge contaminants, which  neglects .competitive-adsorption effects; (2) an overall "working
factor", provided by the user, that accounts for mass  transfer"effects  and unused  bed capacity; (3) sizing
the required carbon mass from the instantaneous organic flows and assumed time of online operation;
and (4) computing the costs for carbon regeneration as well as for periodic carbon replacement.
                                             .4.

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1.4        PHYSICAL PROPERTIES- - —

          The steam stripper simulation model requires physical property data to calculate mass and
energy balances.  Although ASPEN  has a  large physical property  library for over 400 organic and
inorganic chemicals, additional properties (e.g.,  Henry's law constant and refractive index) must be
supplied  to  the  model.   Henry's law constants are needed  for some equilibrium  calculations, and
refractive index is related to the polarizability of a chemical in adsorption calculations.  A supplementary
library of these properties has been prepared  as a part of the steam stripping model so that the user does
not have to supply physical property data for any of the ASPEN- recognized chemicals.

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-6-

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                            2.0  ASPEN "EXPERT SYSTEM"
2.1        OVERVIEW

          In this section, the procedure for creating and running an ASPEN simulation is outlined.
Figure 1. shows the suggested sequence of steps.  The user Gist enters information about the problem at
hand into a "front-end" program that converts the user's responses into an ASPEN software file. This
ASPEN file, written to a personal computer disk, is then uploaded to a VAX mainframe and executed. A
report of the simulation results is generated as  a VAX file, in  standard ASCII format, that can be
downloaded to a personal computer and printed.  Each of these steps is described in the  following
paragraphs.
2.2       INTERACTIVE FRONT-END PROGRAM

          Although ASPEN  is a very powerful simulation tool, getting data  into an ASPEN input
program and preparing it to run is often a tedious task. Data must be typed manually in a fixed format,
and great care is required in preparing the input information.  To make ASPEN easier to use, a "front-
end" program for a personal  computer has been developed that will read a general ASPEN input file
(e.g., template), modify it according to information supplied by the user, and then create a new input file
tailored to the problem at hand.

          A marker/index system was created for entering information into the general steam stripping
template.  In  the template, a marker is placed wherever a piece of information may change according to
the user's input. When the front-end program reads the template file and encounters the marker string,
the appropriate piece of information is inserted at the marker.

          The new input file  can then be uploaded to the VAX and executed according to the ASPEN
run procedure described later. With this "expert system" approach,  the ASPEN steam stripping model
can be used without knowledge of ASPEN programming.
                                           -7-

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                  Figure 1'

Run Procedure for ASHEN Steam Stn'pper-Mbde^
                Load Data Input
                   Software
            Load Existing Dataset
                      Or
              Create New Dataset
                Input Site Data
                 Input Dataset
                Created/Stored
        Scan ASPEN Input File Template,
           Insert Dataset Values To
      Create Customized ASPEN Input File
            Upload Customized ASPEN
          Input File To VAX Computer
             Execute ASPEN Program
           Using Uploaded Input File
             Download ASPEN Report
                     File
          Print Downloaded Report File
         Merge With Input Data Summary
Print Summary
Of Site Data
                     8-

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23       INSTALLATION AND START-UP PROCEDURES

         The Croat-end "expert system" is a Basic computer program that can.be run on an IBM-
compatible (MS-DOS) personal computer equipped with 640K of RAM (random access memory). Color
(RGB/CGA/EGA) and black-and-white (B/W) monitors are supported in a single executable file named
"ASPSTM-EXE". At startup, the program asks the user which type of monitor is installed.

         The front-end software has interactive menus and onscreen help and instructions, making
most operations self-explanatory. To run the program from a floppy disk, the following steps should be
performed:

               1)      Insert  the program disk into the designated  drive and change the DOS drive
                       prompt to the appropriate letter (e.g., A>);

               2)      Type the command "ASPSTM" at the DOS  drive prompt and press [Return]
                       to execute the program;

               3)      Select  a dataset (or set of default values) according to the onscreen start-up
                       instructions;

               4)      Follow instructions as they are displayed onscreen and supply information as
                       requested.

         To operate the program from a hard disk instead of a floppy disk, create a hard disk directory
(at the "C > " prompt) with the DOS command "md c:\ASPEN". (This illustration assumes a directory
name of "ASPEN"; any other choice acceptable to DOS will also work.)  Then place the original program
diskette into  drive A and enter the following  DOS command  at  the "C>"  prompt: "copy a:*.*
c:\ASPEN". To run the program, enter the DOS command "cd \ASPEN" at the "C > " prompt and type
"ASPSTM". The program should then run  normally according  to the  above instructions for floppy disk
operation. When duplicating the original program diskette, copy the contents of the entire  diskette since
the ASPSTM program uses all of the Gles in the startup directory.

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2.4       ENTERING INFORMATION

       • -  The first screen displayed by the front-end program allows the- user to -load-an-eristing-dataset -
or choose the set of default values. The first time the software disk is used; the user must load the default
values from STEAMDAT. During subsequent uses the user may load other datasets he has created and
saved. After loading these values,  the Main Menu is displayed.  Each menu item flashes when it is
selected with the up/down cursor keys.  A reproduction of the Main Menu is shown in Figure 2. Note that
the currently loaded dataset is displayed along with the chosen air emission control option and the choice
of rating/design mode. The user simply selects the items of interest, in any order, from the Main Menu
and enters  information about the problem at  hand by modifying the entries in the  selected dataset.  The
program always returns to the Main Menu when data entry for a given item is complete.  When all data
has been entered, the user can save his work and create an ASPEN input file at the Main Menu with the
"W" option.

          When entering  data with  the front-end software, each input screen will first be displayed with
default values (in brackets  to the right of the screen) for the user to review. A highlighted question at the
bottom of the screen asks  if any changes are  necessary.  If the current entries are acceptable, no further
action is needed and  the [Return] key (or "[N]o") displays the next screen.  Changes in  the displayed
values are made by entering "fY]es" at the bottom of the screen and supplying data at the cursor prompt.
The cursor will begin at the first item, and pressing [Return] at any cursor location will choose the default
value already loaded and move  the cursor to  the next position.  Any entry made by the user will replace
the displayed default  value and advance the cursor.  Pressing [Esc]  at any time (or finishing the data
inputs) will return the user to the bottom of the screen where there will again be an opportunity to review
and/or change the entered  information.

          Another type of information entry is by a menu with a movable cursor bar. An example is the
chemical selection option available on  the Main Menu as item "C". As shown  in Figure 3, this item first
displays the default chemical list and  provides the  user with three options: (1) to delete one or more
chemical's from the default list; (2) to add more chemicals; and (3) to make no changes. A toggle key,
[Fl],  alternately displays the component numbers above 10 and below 10, respectively, if more than 10
are loaded. Deletions are updated immediately on the screen.
                                            -10-

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   Interactive ASPEN Steam Stripping Simulation

           «  MAIN  SELECTION  MENU  »

Use / keys to change selection, [Enter]  to accept

  Current  Data Set  :  [  STEAM.dat  ]

   escriptive  information
   nits conversion of  input data
   omponent selection  /  Properties
   eed  stream  information
   OC control  option / Data,  [ Condenser ]
   lock data for stripper  unit,  [ Design Mode  ]
   conomic parameters
   oad  another dataset or  default values
   ave  current dataset / Create data  summary
   rite modified input file to disk
   uit  program - exit  to DOS
Figure 2. Main Menu for ASPEN "Expert System" Program
                     •11

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        Interactive ASPEN Steam Stripping Simulation
              «  COMPONENTS  /  PROPERTIES  »
     Current List of Components Selected for Simulation
1
2
3
4
. Tetrachloroethylene
. Trichloroethylene
. 1,1,2-Trichloroethane
. 1,1-Dichloroethane
C2CL4
C2HCL3
C2H3CL3
C2H4CL2-1
Components from ASPEN Data Library -                  1   to   4
Do you want to make any change in this Compound  List  ?
       ( A = Add, D = Delete, and [N] = No  )
          Figure 3.  "Component Selection/Properties" Screen
                            -12-

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          Adding chemicals causes a scrolling list of chemical names to appear onscreen (see Figure 4),
and the [T] and [U] keys can be used to [T]ag and [U]ntag selected chemicals.  In the unlikely event that
a chemical of interest is not present in the ASPEN library, it is recommended that a- surrogate chemical
with similar structure and properties be selected from the available list. When the chemical selection is
complete, the user then has the option of reviewing and modifying the Henry's law constants available for
the chosen compounds.

2 J       CREATING A CUSTOM ASPEN INPUT FILE

          Referring  again  to the Main  Menu (see Figure 2),  the  "S" selection saves  the user's
information entries in a named dataset file (with a ".dat" extension) for future recall. It is recommended
that this feature be used frequently when creating a simulation to protect the work against accident. As a
precaution, the user is reminded by the front-end program to save his work before leaving the program
with the Main Menu "Q" selection.

          The "W" selection  in the Main  Menu will both save the current dataset and create a custom,
ready-to-run ASPEN input  file (with a ".inp" extension).  A third file, with  a ".prl" extension, is also
created by the "S" and "W" main menu commands as a summary report of the data entered by the user.
The  user supplies a  name  that is used for  the  dataset,  input  file,  and input data report (e.g.,
"example.dat", "example.inp", and "example.prl").  This naming convention is useful for determining
which dataset was used to create a particular input file and input data report.

          While preparing a dataset to be used to create an ASPEN input file, the user will be prompted
to supply a 4-character run identification string (referred to in the guide as RNID). It is important that
the name selected for the dataset not begin with the RNID. The use of the RNID is discussed further in
Section 4.2.
                                             13

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                 ASPEN  Chemicals:  [T]ag or [U]ntag
                  Trifluorobromomethane     CBRF3
                  Chlorotrlfluoromethane    CCLF3
                  Dlchlorodifluoromethane   CCL2F2
                  Phosgene                  CCL20
                  Trichlorofluoromethane    CCL3F
                  Carbon-Tetrachloride      CCL4
                  Carbon-Tetraf1uori de      CF4
                  Carbon-Disulfide          CS2
                  Chlorodifluoromethane     CHCLF2
                  D1chloromonofluoromethaneCHCL2F
Position cursor bar using / keys, hit [T] to tag a chemical
hit [U] to untag a chemical, hit [ENTER] to return chemical
[PgUp], [PgDn], [Home] and [End] are also active.
list,
         Figure 4. Chemical Selection Menu in Front-End Program
                              -14-

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                            3.0  USING ASPEN ON THE VAX

        Use  of the ASPEN steam stripper model involves using a personal computer (PC) as a
computer terminal to connect to the EPA National Computer Center (NCG) VAX Cluster; transferring
computer files from the personal computer to the VAX, and executing the ASPEN model through the
computer terminal.  The procedures given below are to be followed to ensure proper execution of the
ASPEN program.

        Questions relating to the use of the ASPEN program can be directed to Mr. Robert Blaszczak.
Control Technology Center, U.S. EPA at (919) 541-5432. This user's guide has been written to provide
enough information for user to complete an ASPEN run. However, information regarding the services
provided by and operations of NCC are contained in the publication titled Guide to NCC Services.
published  by  U.S.  EPA,  Office of  Administration  and Resources Management, National  Data
Processing Division. A copy may be requested from user support services at the telephone number
listed below. The "VAX Cluster Ready Reference" section in the guide provides essential information
for users of NCC's VAX computers. Basic descriptions of procedures, utilities, languages, and software
are included in the VAX online documentation. The NCC comprehensive user support service may be
reached at (FTS) 629-7862 or (919)541-7862, or (800) 334-2405 for users outside North Carolina.

3.1     SETTING UP A USER ACCOUNT

        Currently, the APSEN steam stripper model is available on the VAX Cluster located at NCC.
Research Triangle Park, North Carolina.  Each new user must obtain a user ID and account code  to
gain  access to the computer.  Users who already have these items and know how to use them at their
own computer terminals may proceed immediately to Subsection 3.2.

        Obtaining an account  on the VAX computer at NCC requires  submission of a  user
registration form for approval by the EPA account manager or ADP coordinator.  This form, EPA
Form N258, is used whether or not the new user is an EPA employee. A sample Form N258 is included
in Appendix B.

        For EPA  users, the form is signed and submitted by the Automatic Data Processing (ADP)
Coordinator of the user's EPA organization and sent to the Time Sharing Services Management System
(TSSMS) Office at the address shown on the form.  Non-EPA users must be in an organization that has
established an Inter-agency Agreement (IAG) with EPA.  If the IAG is with a Regional Organization
(RO), the form is submitted to one of the 10 regional ADP Coordinators as shown in Table 1.
                                          -15-

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                           Table 1. Regional ADP Cobrdihafdrs:
Region
              Name
        Address
   Telephone
HI
     Michael T. MacDougall
     Chief, Data Management
     Section

     Mr. Robert A. Messina
     Chief, Data Systems
     Branch

     Mr. A. Joseph Hamilton
     Chief, Info Systems
     Branch
John F. Kennedy Bldg.
Rm. 2211
Boston, MA 02203

26 Federal Plaza
Rm.404
New York, NY 10278

841 Chestnut Street
Philadelphia, PA 19107
                                                            FTS-835-3377
                                                            617-565-3377
                                                            FTS-264-9850
                                                            212-264-9850
FTS-597-8046
215-597-8046
IV  Mr. Richard W. Shekell
     ADP Management Branch
V   Mr. Stephen K. Goranson
     Chief, Management
     Services Branch

VI  Mr. David R. White
     Chief, Data Processing
     Branch
     Mr. Dale B. Parke
     Chief, Programs Systems
     Section

     Mr. Alfred R. Vigil
     Chief, Info & Comp
     Management Branch

     Mr. Eldred G. Boze
     Chief, Info Research
     Management Branch

     Mr. James C. Peterson
     Chief, Data Systems
     Branch
DC
X
                                  345 Courtland Street
                                  Room-67
                                  Atlanta, GA 30365

                                  230 South Dearborn
                                  (5-MI-ll)
                                  Chicago, IL 60604

                                  1445 Ross Avenue
                                  Dallas, TX 75202
                                  726 Minnesota Avenue
                                  Kansas City, KS 66101
                                  999 18th Street
                                  Denver, CO 80202
215 Fremont Street
San Francisco, CA 94105
1200 6th Avenue
Seattle, WA 98101   -  .-
                          FTS-257-2316
                          404-347-2316
                          FTS-353-2074
                          312-353-2074
                          FTS-255-6540
                          214-655-6540
                          FTS-276-7206
                          913-551-7206
                          FTS-330-1423
                          303-293-1423
                                                            415-556-6536
FTS-399-2977
206-442-2977--
                                          -16-

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        If the central office of EPA is handling the IAG, Patrick Garvey; EPA PM-211M, -WSM,-40r
M Street, S.W., Washington, D.C 20460, at (202) 382-2405 or (FTS) 382-2405, should be contacted.   -

        When the request for an account has been approved i>yTSSMS,-the-new user will be sent a
personal letter containing his or her account code, user-ID, and initial password:	 •    • — -  -
3.2     ACCESSING THE VAX USING PERSONAL COMPUTERS

        After receiving an account code, user-ID, and password from TSSMS, and creating a custom
ASPEN input file on a personal computer with the front-end software as described in Subsection 2.5, the
next step is to connect the personal computer with the NCC VAX Cluster.  The personal computer is
used as a terminal to upload the ASPEN input file and to run the ASPEN program on the NCC VAX.
The following procedures are used for personal computers because they are capable of both generating
the ASPEN input file and serving as a computer terminal. In the following text, prompts from the VAX
system are enclosed by "  ", and response to a prompt is enclosed by <  >, and specific keys to be
pressed are enclosed by [  ]. It is not necessary to type these symbols in the operations.

        Using a personal computer as a terminal, a user can dial-up  the NCC VAX Cluster by a
modem through a telephone line. Since there is a wide variety of communication packages and modems
that can  be used,  users should refer to their hardware and software documentation for  specific
instructions.  There are, however, some general guidelines that apply to  all types of communications
with the VAX:

        •       Connection can be made at either 1200 or 2400 baud.

         •       Communication software should be set to emulate a VT-100 type terminal. -  .  -

        •       Communication  parameters should be 7 data bits, 1 stop bit, and even parity (An
                example of communication parameters setting for Crosstalk communication .software
                is included in Appendix C).

        Local users in Research  Triangle Park, North Carolina  can dial up the Port Selector switch
directly at (919) 541-4642 or (FTS) 629-4642 for 1200 baud, or at (949) 541-0700 or (FTS> 629-0700 for-
2400 baud.  When  the connection is made, press [Enter] once to display the Port Selection menu as
shown in Figure 5.
                                          -17.

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                        Figure 5. Example of the Port Selection Menu
       Welcome to the Environmental Protection Agency National €o'mputer. Center-

        Please enter one of the following selections:-
               ffiMPSIforffiM
               TCP for IBM 3270 EMULATION
               VAXAforVAXSYSA
               VAXBforVAXSYSB
               EMAIL for EMAIL

        Enter selection:

        At this point, type either  or   and press [Enter] to connect to
the VAX.  The typed characters will not be shown on the screen. After making a selection, a
"Connected." message should appear.  Press [Enter] again to initiate the logon procedure as
described in Subsection 3.3.1.

        Users outside the Research Triangle Park, North Carolina, may reach the Port Selector
menu through the TYMNET communication network.  When connecting to TYMNET, type
< A> in response to the prompt "Please type your terminal identifier", then on the next screen
type   for 1200 baud connection, or  for 2400 baud. After a short message,
the Port Selector menu will appear and the selection can be made as described above for dial-up,
Port Selection switch users.

        Users located in the Washington, DC area, can access the VAX Cluster through the
Washington Information Center's (WTC) Data Switch at (202)488-3671, A different selection
menu appears on the screen with this connection.  Type  and press [Enter] at the
prompt "YOUR SELECTION? >" to complete  connection with the NCC VAX.  Users in the
Washington, DC area should contact the WIC Telecommunication Group at (202) 382-HELP for
assistance if there are any questions or problems in completing the~connectiori. -.
                                         -18-

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33      RUNNING THE ASPEN PROGRAM ON THE VAX

        Once the connection between the personal  computer and the NCC VAX Cluster has
been established, the following procedures are followed for running-the ASPEN-program.


        33.1   Logging In to the NCC VAX Cluster Computer

        After the VAX responds with a prompt "Connected." for the connection,

        1.     Press [Enter] to get to the Username/Password prompts.

        2.     Enter the appropriate username and password at these prompts. An on-screen
               bulletin will show the status of your previous connections and any current news
               alerts. An example of this on-screen bulletin is shown below in Figure 6.

        3.     Type   and press [Enter] in response to  the "Project:" prompt
               following the on-screen bulletin as shown in Figure 6.

        4.     A "$" prompt will appear indicating the connection to the NCC VAX has been
               successfully completed.
                                          19-

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                             Figure 6.

       Example of Login Screen'and Oh-Screen^BuJletihxin
Enter selection:
Connected.

Username:
Password:
 VAX User Support: (FTS) 629-7862 or 919-541-7862 or 800-334-2405

 VAXCluster OPERATIONS STATUS PHONE: FTS 629-2969 or 919-541-2969
  For the current Operations schedule type: OPERATION_SCHEDULE
Last interactive login on Wednesday, 16-May-1990 08:56
Last non-interactive login on Wednesday, 16-May-1990 00:10

Last Boot time was  14-May-1990 06:26:36.45
                  CURRENT NEWS ALERTS
 05/14/90: TAPE IS NOT ANSI FORMAT ERRORS - SEE NEWS ALERT2
 04/17/90: MEMORIAL DAY ELECTRICAL OUTAGE - SEE NEWS ALERT3
         TYPE "NEWS ALERT#" TO VIEW AN ALERT

Project: ASPEN001
$	
                               •20-

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        332   Transferring Files from a Personal Computerto the=VAX

        Before using the ASPEN software, it is necessary to upload the ASPEN input file,
XXXXJNP, created with the front-end program described in Subsection 2.5, to the VAX.  First
time users also need to upload a LOGIN.COM file which is supplied along with the front-end
software. File transfers are accomplished using the Kermit file transfer protocol on the VAX and
the PC.   The  following  steps would  be used for a personal computer using  Crosstalk
communication software.

        1.     At the "$" prompt, type < KERMIT > [Enter] and wait for a "Kermit-32>"
               prompt to appear.

        2.     At  the "Kermit-32>"  prompt, type.    [Enter].
               (XXXX is the file name and YYY is its extension you give to the file you are
               going to transfer from the personal computer and store on the VAX.)  At this
               point, the VAX will pause and wait for the  file transfer to be initiated from the
               user's personal computer.

        3.     Press [Home] to display Crosstalk's command line at the bottom of the screen
               (e.g., "Command?") and type  [Enter] to
               start the file transmission. (DISKDRIVE may be any disk drive or a directory
               on a hard disk drive, XXXX.YYY is the name of the ASPEN input file with the
               extension JNP or LOGIN.COM file.)

        4.     Paced, error-checked transmission of the ASPEN input file or LOGIN.COM
               file then begins. When the transfer is complete the message "file transmission
               complete"  will appear  on the screen  for Crosstalk.   Other communication
               software will display messages such as "more to come  . . . press ENTER" or
               supply a sound signal prompt to indicate the file transfer is complete.

               During file transfer an error indication may appear  on the screen.   Most
               communication  software will retransmit the portion of the file in which the
               error occurred, therefore correcting the  error automatically.   If too many
               errors occur (number varies according to software specification) the transfer
               will terminate in an error condition.  In this case go to step 5 and repeat step 2
               through 4 for the same file.
                                          -21

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        5.      Press [Enter]* thenpIomeJ^en^EnterJtO'Obtaaiihe 'AKeE^t^x?* prompt.-

        6.      If more than one file is being transferred, repeat steps 2 through-5 for each file.

        7.      When all files are transferred, type   to return to the "$" prompt on
               the VAX.


        333   Copying Library Files to User Account for First Time Users

        New users using ASPEN for the first time should copy two library files from another
directory on the VAX before making any run on the ASPEN program.  These files can be copied
as follows:

        1.      At the "$" prompt, type
               
               [Enter], then wait for the "$" prompt.

        2.      At the "$" prompt, type
               
               [Enter], then wait for the "$" prompt.


        33.4   Running the ASPEN Steam Stripper Program on  the  VAX

        First time users, should have 4 files on the VAX under their directory. These are:
USERLIB.OLB,  USERUB.OPT,  LOGIN.COM, and  the  ASPEN  input file XXXX.INP.
(XXXX is the file name assigned to the file with the specific extension  ".IMP" for the input file.)
When the LOGIN.COM file is initially uploaded from the PC, the file should be executed once
using the command in step 1 below. Otherwise, proceed to step 2.

        1.      At the "$" prompt, type < ©LOGIN.COM > [Enter] to execute the login
               command file one time, then wait for the "$" prompt.
                                        -22-

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        2.      At the "$" prompt, type   [Enter] to check if all the
               necessary files are present  If not, return to Subsections 33.2 or 333 and
               follow the procedures to upload or copy the needed files.

        3.      At the "$" prompt, type < ASPEN > [Enter] and respond to the prompt
               "Please enter input file name (? for help)" with   [Enter], or
               type < ASPEN XXXX> [Enter] directly to initiate the ASPEN program.

        4.      At this point, a screen prompt asks whether the input file contains inserts or
               user libraries. Respond with  [Enter],

        5.      At the "$" prompt, the  VAX will respond with the message "Job XXXX
               (queue aaaa, entry nnn) started on bbbb_bbb", then followed by another "$"
               prompt.

        6.      When the run is completed, the VAX displays a message "Job XXXX (queue
               bbbb_bbb, entry nnn) completed" at the "$" prompt.  This will be followed by
               another "$" prompt.

        7.      Type    [Enter]  to check if the result  files for a
               successful run are generated. These should include: ZZZZ.HIS, ZZZZ.LOG,
               ZZZZ.PRM, and ZZZZ.REP files.  In this case ZZZZ is the RNID specified
               in the input file (see Section 4.2).

        8.      If the result files are not generated, type   [Enter] to
               list the log file which will contain any error messages that might have been
               issued by  the ASPEN  software or VAX system software.  You may press
               [CtrI] + [S]  simultaneously  to pause  the  display,  [Ctrl] + [Q]  to  resume
               scrolling, or press [Ctrl] + [C] or [Ctrl] + [Y] to exit from scrolling.
        3.3.5   Transferring Output Files from the EPA-VAX to a Personal Computer

        The result files generated by the ASPEN program can be downloaded from the VAX
to a personal computer if desired.  The procedures for downloading are identical to those in
Subsection 3.3.2 for uploading, except steps 2 and 3 are replaced by the following two steps.
                                         -23

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        2.     At the "Kermit-32>" prompt, type ~[Ehter].~ (XXXX"
              is the file name ancbYYY-is its extension-thatyou:are jomg4ordownload-from-r
              theVAX.)

        3.     Press [Home] to display Crosstalk's command line at the bottom of the screen
              (e.g., "Command?") and type  [Enter] to
              start the file transmission.

        Downloading XXXXJPR2 file will take about 1 minute at 1200 baud.
        3.3.6   Logging Out Procedures

        1.      At the "$" prompt, type < LOGOFF > [Enter] to disconnect your personal
               computer from the VAX. The screen will show "NO CARRIER" after a short
               message.

        2.      Press [Home] to display Crosstalk's command line at the bottom of the screen
               (e.g., "Command?") and type  to exit from Crosstalk.

        At this stage, you have completed  the operation  of running ASPEN on the VAX
through a personal computer.  Word processing software or a text editor can be used on a
personal computer to view or print the downloaded ASPEN output flies.
                                        • 24.

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                           4.0  SIMULATION RESULTS -

        The procedures used to estimate capital  and annual costs for this simulation are
intended to be of preliminary "study" estimate quality. Study estimates are accurate -to -_+. -30
percent and are used to estimate economic feasibility of a project with a relatively low cost for
estimate preparation and based on minimum  data  (Reference  2).   The algorithms-and
compound data  used to  compute estimated  stripping column heights or estimated column
performance for  specific  chemicals yield approximate results.  To prepare a stripper design or
rate column performance for purposes  of obtaining vendor guarantees, many more details on
specific site conditions such as feed  variability, steam quality, and annual variations in cooling
water temperatures are required.
4.1      COST CALCULATIONS

         The steam stripper model contains costing procedures developed by EPA/OAQPS,
Economic Analysis Branch (EAB) and published in the EAB Control  Cost Manual (Reference
6). The cost results are indexed for convenience to January 1986 and can be adjusted to any
desired year using an appropriate Chemical Engineering Plant Cost Index. Figure 7 summarizes
the main components of the total annual cost. Currently, no organic recovery credit is included
in the cost calculations. A cost summary like the one presented in Appendix A is generated as
part of the ASPEN report output.

         The Total Annual Cost (TAG) is the sum of the direct annual costs (e.g., utilities, labor,
and maintenance) and the indirect  annual  costs (e.g.,  overhead,  property  taxes,  insurance,
administrative charges, and capital recovery). Annualized capital costs are combined with fixed
operating costs to give a levelized yearly expenditure that can be compared directly to that of
other processes.
4.2      REPORT OUTPUT

         Prior to creation of a custom ASPEN input file, the front-end program asks the user for
a 4-character run identification string (referred to in this discussion'as RNID).  -The ASPEN
system uses this run ID to create files in the VAX disk directory where the simulation is
executed.  Several  of these files are worth  noting  because  they contain error  messages,
intermediate calculations, or simulation results. A severe error in input file syntax or format
                                           -25

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                              Figure?
Instrumentation: 10% of Base Equipment Cost (BEC)




Sales Tax & Freight: 8% of (BEC + Instr.)




Purchased Eauivment Cost (PEC) : (BEC) + (Instr.) + (Sales Tax & Freight)




Total Installation Cost (Direct + Indirect): 67% of PEC




Total Capital Investment (TCI) : (PEC) + (Total Installation Cost)




Supervision and Admin. Labor: 15% of Direct Labor




Maintenance Labor and Materials: 3% of TCI




Overhead: 60% of (Op. Labor  + Supv./Adm. + Maint.)




Property Taxes, Insurance, and Admin. Charges: 4% of TCI




Capital Recovery: 10% over a 15-year service life




Total Annual Cost: (TAC) Direct + Indirect Costs




Annual Operating Cost: TAC - Capital Recovery






Basis: 300 24-hr operating days/yr
                                  •26-

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(causing early termination of the run) will be highlighted in a file called "RNIDJirr^' Less
severe errors and warnings, as well as intermediate calculations, can be found in a file named
"RNID.HIS" (called the ASPEN History File). Tfie final report  for-the simulation is mamed
"RNID.REP" (called the ASPEN Report File).-  : ~-

          NOTE:      Because ASPEN creates a large number of output files (particularly
                      for runs that abort prematurely), an ASPEN utility program called
                      "GETRIDOP'  is available on the VAX  to erase unwanted
                      simulation  results.   For example, the command  "GERTRIDOF
                      TST1" would delete all VAX files beginning with the run ID 'TST1".
                      To avoid accidental file erasures, NEVER give the  custom ASPEN
                      input file (or any other file you want to keep!) a name that begins
                      with the RNID.
          A report from a simulation run consists of three parts: background material, a summary of
input data prepared  by the  front-end program  from  the  user's  inputs, and  a performance and
economic analysis generated by ASPEN. The background material consists of a process schematic and
a general narrative description of the ASPEN model.  Copies of these are kept on file for each of the
possible process configurations.

          The second and third sections of the report are stored in files with the same base name as
the parent dataset/input file and extensions of ".prl" and ".pr2" respectively. The input data summary,
"example.prl", is created by the front-end program on a personal computer (with either the "S" or
"W" main menu options) and can be routed to a printer with any of several DOS commands (for
example, "copy example.prl Iptl:", where Iptl: is a line printer connected to parallel port 1). This is
done after exiting the front-end program to generate a "hard copy" of the data that has been entered.
An ASPEN results summary, "example.pr2'Y is created as a  VAX file during the course of  the
simulation  run and  can be downloaded to  a  personal computer (for printing) according to  the
procedures outlined earlier.

          Put together, these parts provide  a complete report of the. simulation-results, including
background information and a schematic of the process being modeled: -As an example, Appendix A
contains a case report created for a steam stripper equipped with a vapor-phase carbon adsorber for
control  of steam emissions.  Finally, the History and  Report Files  on the VAX can be downloaded
and/or printed, if necessary, to provide supporting calculations suitable for technical reference.
                                          -27-

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• 28-

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                                         5.0    REFERENCES
1.       JRB/SAIC, "Costing Documentation and Notice of New Information Report", June  12,
        1985.

2.       Perry, RJL and Chilton, CH., Chemical Engineers' Handbook, Fifth Edition, New York:
        McGraw-Hill Book Company, 1973.

3.       Onda, K., E. Sada, and Y. Murase, "Liquid Side  Mass Transfer Coefficients in Packed
        Towers", AIChE Journal, 5:235-9,1959.

4.       Treybal, R.E., Mass Transfer Operations, New York: McGraw-Hill Book Company, 1980, p.
        1.28.

5.       Polanyi, M., Verb. Dtsch. Phys. Ges.. 16,1012 (1914).

6.       EAB Control Cost Manual (4th Edition), Draft Report, EPA Office of Air Quality Planning
        and Standards, Economic Analysis Branch, Research  Triangle Park, NC, March  1989,
        Chapters 3 and 4.
                                          -29-

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   APPENDIX A
A Sample Case Study
      Al

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                        STEAM STRIPPER MODEL BACKGROUND;   .
     U.S. EPA-Office of A1r Quality Planning and Standards (EPA-OAQPS),  has
sponsored development of an ASPEN user model to describe  the process of steam
stripping of the volatile organic chemicals from wastewater feed stream.  In
addition a completely Interactive software has also been  developed to allow a
user running an ASPEN steam stripping simulation without  any knowledge of
ASPEN programming.  ASPEN is an acronym representing "Advanced System for
Processing Engineering," a software package available commercially for
chemical process design and simulation.  ASPEN allows modular building of
flowsheet blocks to represent a steam stripper with or without air emission
controls.  It also contains an extensive physical property library and costing
routines.
     The process simulated by the steam stripping model is shown schematically
in Figure A-l.  This model can be run in one of two modes:  rating mode and
design mode.  In the rating mode a specific, known steam stripper design can
be evaluated by inputting basic design parameters such as flow rates,
concentrations, and tower dimensions and then comparing the predicted
performance results with observed ones.  Similar information would also be
required for any existing air emission control device.  The rating mode also
allows  "what if..." calculations by changing the operating parameters such as
steam/water ratio and  influent concentrations.
     In  the design mode one needs to provide only the wastewater flow rate,
influent concentrations, desired removal rates or effluent concentrations, and
the air  emission control selected.  The model will calculate the necessary
optimum  tower design to achieve the specified effluent limits, and provide
sizing  information for the selected control equipment.  In both modes the
steam stripper ASPEN model determines the capital and operating costs

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associated with the stripper as well as.-the control equipment. >The output for  .
each mode 1s provided 1n units typically^ used in. .describing equipment
dimensions, flows, and concentrations. _-,.: ,
     The ASPEN steam stripper model allows three, options-for controlling the
VOC air emissions:  1) condensation of additional vapors using a refrigerant
in a secondary condenser, 2) adsorption on a fixed bed of activated carbon,
and 3) catalytic oxidation of the VOC's at an appropriate temperature to
assure complete destruction of the VOC's.   A model has also been developed for
describing adsorption of the VOC's on carbon based on Polanyi's 'generalized
isotherm' concept.  The catalytic oxidation operation uses an auxiliary fuel
such as natural gas to maintain the desired temperature of the catalytic
combustor.

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                               Secondary
                               Condenser
                      Overhead
                       Vapor
                 Steam
Contaminated
                                            Vent
                                     Vapor
                                               Condensed
                                                 Liquid
 Primary
Condenser
                             Steam
                            Stripper
                                       Hot
                                      Feed
                                Residual
                             Feed
                           Preheater
                                       -^Effluent Water
Recovered
 Organics
              Rgure A-1: Schematic of a steam stripping process with
                         a secondary condenser.

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RESULTS OF
STEAM STRIPPING SIMULATION
USING ASPEN
A sample ASPEN Data File


By

John Doe
06/26/90

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                      STRIPPER SITE INFORMATION
SITE DESCRIPTION

Site Name:      ABC
Site Address:   123 Main Street
                Anytown    AB 12345

Contact Person: John Doe
STRIPPER STATUS

         Existing stripper             X   New Design


AIR EMISSIONS CONTROL STATUS

         None
         Secondary condenser
    X    Vapor phase carbon adsorption
         Catalytic oxidation

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                          SUMMARY Of,.INPUT DATA
  SIMULATION MODE

          Rating (Performance) Mode

      X   Packed Column Mode
               X   Design Mode

                   Tray Column Mode
  WASTEWATER STREAM INFORMATION
  Flow Rate
  Temperature
3.20E+01 (Kg/s)
   30.00 ( C)
  CONCENTRATION OF VOC'S IN WASTEWATER
          VOC Name

Chloroform (CHCL3)
Tetrachloroethylene (C2CL4)
Trlchloroethylene (C2HCL3)
1,1,2-Trlchloroethane (C2H3CL3)
l,l-D1chloroethane (C2H4CL2-1)
l,2-D1chloroethane (C2H4CL2-2)
                 Concentration      H Value
                 (ppbw or ug/1)  (atm-m3/gmole)
                   1.20E+05
                   5.50E+04
                   3.25E+04
                   1.87E+04
                   8.50E+03
                   2.60E+05
 ,39E-03
 ,90E-02
 .10E-03
 .40E-04
 .54E-02
1.20E-03

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                   SUMMARY OF INPUT DATA (cont'd)


INPUT DATA FOR THE RATING MODE


TOWER DIMENSIONS

 Tower Diameter                 (M)
 Packing Height                 (M)
 Nonactlve Height               (M)


STEAM FLOW INFORMATION

 Steam Flow Rate                   (Kg/s)
 Steam to water ratio              (lb/gal)



INPUT DATA FOR THE DESIGN MODE

 Design Component — Chloroform

 Target removal efficiency of the design component  9.99E+01  (%)
 Target effluent concentration of the design        9.60E+01  (ppbw)
     component

 Steam to Water Ratio   5.00E-01 (lb/gal)
 Steam Flow Rate        1.92E+00 (Kg/s)

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                   SUMMARY OF INPUT-DATA (cont'd)
CONTROL UNIT DATA

 Secondary Condenser:

 Temperature of secondary condenser
 Inlet temperature of refrigerant
 Return temperature of refrigerant
                   C)
                  . C)
                 ( c)
 Carbon Adsorption:

 Carbon replacement cost
 Carbon regeneration cost
 Carbon Used per Year
4.41E+00 ($/Kg)
1.76E+00 ($/Kg)
         (Kg/Yr)
 Catalytic Oxidation:

 Cost of natural gas (fuel)
 Temperature of combustor
         ($/M3)
         ( C)
COST DATA

 Labor rate                1.20E+01 ($/Hr)
 Annual labor              2.00E+03 (Hr/Yr)
 Operating Days per Year   3.00E+02 (Days/Yr)
 Cooling water cost        1.80E-05 ($/Lb)
 Steam cost                4.00E-03 ($/Lb)
 Electricity cost          6.00E-02 ($/KwHr)
 Equipment service life    l.OOE+01 (Yrs) !
 Interest rate             l.OOE+01 (%)  -1

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                SUMMARY OF STEAM STRIPPER SIMULATION RESULTS
— STRIPPER COLUMN DATA:  SIMULATION MODE - Packed Column/Design
                                          ,25
                                          ,16
Tower Diameter     ...            1.37
Packing Height (Equivalent)    .3
Number of Trays (Equivalent)    -2
Total Height of Stripper
Number of Transfer Units         7.23
Height of a Transfer Unit        0.45
Steam-to-water ratio             0.50
                (meters)
                (meters)
                                         5.25  (meters)
        Note: Equivalent Values are determined for the
              Design Component - CHCL3
                                               (meters)
                                               (lb/gal wastewater)
— PERFORMANCE DATA:
        * OVERALL MATERIAL BALANCE *

        Total Wastewater Flow  Into the Stripper
        Effluent Treated Water Flow
        Steam Flow  1n Stripper
        Primary Condenser Effluent Liquid

        Total VOCs  1n Wastewater
        Total VOCs  1n Effluent water
        Total VOCs  1n Primary  Condenser Water
        Total VOCs  1n Air Emissions
            (before  A1r  Emissions  Control unit)

        VOC  Removal  Efficiency of Stripper
                                             1.1527E+05   (kg/hr)
                                             1.1521E+05   (kg/hr)
                                             7.4257E+03   (kg/hr)
                                             7.3690E+03   (kg/hr)

                                                  56.96   (kg/hr)
                                                   0.06   (kg/hr)
                                                  56.90   (kg/hr)
                                                   0.01   (kg/hr)
                                                   99.90   (%)
         *  INDIVIDUAL  VOC  COMPONENT MATERIAL  BALANCE  *
 VOC  Name
          In  with
         Wastewater
   Out with
Effluent Water
  (Stripper)
   Out with
Effluent Water
  (Condenser)
                ppmw   kg/hr    ppmw    kg/hr
                                          ppmw
                           kg/hr
 Removal
Efficiency
CHCL3
C2CL4
C2HCL3
C2H3CL3
C2H4CL2-1
C2H4CL2-2
120.0
55.0
32.5
18.7
8.5
259.5
13.832
6.340
3.746
2.155
0.980
29.912
0.10
0.07
0.03
0.03 •
0.01.
0.28
0.011
0.008
0.003
0.004
0.001
0.032
1860.85
852.69
503.98
289.75
131.81
4023.45
13.818
6.332
3.742
2.-152
0.979
29.^877
- 99.92
•99.88
99.91
• -99.82
- -99.93
•-• 599.89

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                     PREDICTED CAPITAL AND ANNUAL COSTS
— TOTAL CAPITAL INVESTMENT:

        Steam stripper
        Feed preheater
        Primary condenser
        Wastewater storage tank
        Primary condenser decanter
        Carbon adsorber

        Total Base Equipment Cost

        Purchased Equipment Cost

        Total Capital Investment

— ANNUAL OPERATING COSTS:

        Steam cost
        Cooling water cost
        Electricity cost
        Carbon replacement / regeneration cost


        Total Utilities Cost

        Operating and maintenance labor,
           capital recovery cost,
           miscellaneous costs
 $  25700.
 $  85800.
 $  21900.
 $ 121300.
 $  25400.
 $   4100.

 $ 284200.

 $ 335300.

 $ 539900.
$  454400. /yr
$   83200. /yr
$    6800. /yr
 $   1500. /yr
 $ 545900. /yr

 $ 179500. /yr
        Total Annual Cost
 $ 725400. /yr

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              APPENDIX B
Sample Form N258 - EPA ADP IBM, LMF, & VAX
       Account and User Registration
                  A2

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            EPA ADP IBM, LMF, & VAX ACCOUNT AND USER  REGISTRATION
                                                THIS REQUEST:
   O  Establishes a New Account
   O   Adds, Deletes, or Changes Users(s) on Existing Account f_
       (Note: Form N 251 must be completed to modify information other than user data on an existing account)
                                                                                             TSSMS USE ONLY
                                                                                             Date Received:
  HARDWARE (CHFCK ONLY ONE)

   D  BM3090       D  BM4381Washirigton,DC

   D  LMF (Specify)	
   D  NCC VAX Cluster

   D  Other (Specify) _
   .Model VAX
SOURCE OF TIMESHABE FUNDS (CHECK ONLY ONE)

O   ULS.EPA      D  Neragercy/lntergovernmental Agreement (IAG)


D   Other (Specify)	|	

To Be Completed by EPA IAG Coordinator


Is account to be charged IAG10% surcharge?     O  Yes   D  No


       (EPA IAG Coordinator's Signature)
                  PURPOSE OF ACCOUNT OR BRIEF DESCRIPTION OF ACTIVITY ACCOUNT WILL SUPPORT
   EPA Organization Code (8-digit code)
                               FMS Code (10-digit code)
   Account Title (Limit: 60 characters, including spaces)
   •Account Manager's Name (Last, First, Ml). Must be EPA employee.
   To b* a uwr en thb account, Account Utnigtr must bt included on ravm* «ld«.
   Mail Code (or room)
 Office or Location
   Address (Street or P.O. Box)
         City
        Phone
         FTS

        or

        Phone (include area code)
       State
Zip Code
                                                                   Reference
                                                                   Initials
                                                                   (TSSMS-
                                                                   assigned)
   EPA ADP Coordinator's Name (ptease print or type)
                     Phone
                               EPA ADP Coordinator's Signature (required)
                                             Email ID
                                                                                                      Date
       USER INITIALS CODE
       (TSSMS-Assigned)
       (Supply if known)
 RETURN FORM TO:
 U,S. Environmental Protection Agency
 National Data Processing Division
 TSSMS Office (MD-34C)
 79 Alexander Drive, Building 4501
 Research Triangle Park, NC 27711
COOES USED IN ASSIGNING USERS ON REVERSE SIDE

                SPECIAL FEATURES CODES
                (Check one for each user listed.)

                Default is IBM SEPATSO
                           JEPATST
                    S-  IBMSTORET(AASTORET)
                    0 •  Other (please specify)
        TSSMS USE ONLY
                                     USER TYPE CODES
                                 (Check one tor each user tisted.)

                                 E - EPA Employee
                                 C - Contractor/Commericial
                                 F - Federal Non-EPA
                                 S • State or Local Government
                                 U • University
                                 0 -Other
                                 (SEE REVERSE SIDE FOR ASSIGNING USERS TO ACCOUNT)
N2S8(PACEt)

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                     USERS ASSIGNED TO ACCOUNT
                           (Please Print or Type)
USER

NAME (Last, First, M.L)
Mai Cod* (or room) O«c* and/or Company
Address (Sfreet or P. O. Box) City
Phone
(FTS)
or
Phon* (Indud*
area code)
( ) -
State ZpCod*
User Initials
TSSMS-Assigrwd
Special Features
a s
G Other

User Type
GC GU
OF GO
GE GS
Update Action D Add User D Delete User O Chary* us*rWoimailon a* Bstad above.
USER
NAME (Last. First. MJ.)
Mai Cod* (or room) Office and/or Company
Address (SlrMt or P. O. Box) City
Update

USER

Action- O Add User G Delete User

NAME (Last, first. M.I.)
Mai Cod* (or room) Office and/or Company
Address (Street or P. O. Box) City
Phon*
(FTS) -
or
Phon* (Indud*
area cod*)
( ) -
State Zip Code
User Initials
TSSMS- Assigned
Special Features
G S
G Other

User Type
ac au
GF GO
GE GS
G Change user Information as listed above.
Phone
(FTS) - .
or
Phone (Include
area code)
( ) -
State Zip Code
User Initials
TSSMS-Asclgned
Special Features
G S
G Other

User Type
ac au
OF ao
ae as
.Update Action O Add User D Delete User D Change user Information as fisted above.
USER

NAME (Last. Fnt, M.I.)
Mai Cod* (or room) Office and/or Company
Addmsa (Street or P. O. Box) City
Phone
(FTS) -
or
Phone (Include
area code)
( ) -
State Zip Code
Usar Initials
TSSMS-Asslgned
Special Features
G S
G Other

User Type
ac au
OF ao
OE as
Update Actton D Add User D Delete User a Change user Information as Bsted above.
USER

NAME (Last. First, M.I.)
Mafl Code (or room) Office and/or Company
Address (Sfraet or P. O. Box) City
Phone
(FTS) -
or
Phone (Include
area code)
( ) -
State Zip Cod*
User Initials
TSSMS- Assigned
Special Features
G S
G Other

User Type
ac au
GF GO
GE as
Update Action D Add User D Delete User G Change user Information as listed above.

USER(S) UPDATE
ACCOUNT NO. CHECK HERE IF CHANGE OF ADDRESS ON
EPA ACCOUNT MANAGER

TSSMS USE QNL Y

TSSMS USE ONLY

TSSMS USE ONLY

TSSMS USE ONLY

TSSMS USE ONLY

TSSMS USe ONLY

LY

OR ADP COORDINATOR (Signature Required) Phone Email 10
N2SA(PAGE2)

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              APPENDIX C
Example of Communication Parameters Setting
         on Crosstalk Status Screen
                   A3

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                       CROSSTALK - XVI Status Screen  —-
NAme    CROSSTALK defaults Hayes Smartmodem 2400 LOaded  CrSTD.XTK
NUmber 5410700  CApture    Off
	Communications parameters	  	Filter settings	
SPeed 2400  PArity Even  DUplex Full           DEbug    Off   LFauto   Off
DAta  7     STop   1     EMulate VT-100        TAbex    Off   Blankex  Off
POrt  1                  MOde    Call          INfliter On    OUTfiltr On

		Key settings		—  	SEnd control settings--
ATten  Esc               COmmand ETX (~C)      CWait
None
SWitch Home              BReak   End           LWait     None
        	Available command files	


         1)  IBM-TSO     2) NEWUSER     3) SETUP         4)STD
         Enter  number  for file to use  (1 -4):

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                                   TECHNICAL REPORT DATA
                            (Please read Instructions on the reverse before completing)
 . REPORT NO.
 :PA-450/3-90-003
                              2.
                                                            3. RECIPIENT'S ACCESSION NO.
4. TITLE AND SUBTITLE
ASPEN Expert  System for Steam Stripping Calculations
                                                            5. REPORT DATE
                                                               July 1990
             6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)

Tony Rogers  and  Ashok Damle
             8. PERFORMING ORGANIZATION REPORT NO.
9. PERFORMING ORGANIZATION NAME AND ADDRESS

Research Triangle Institute
Post Office  Box  12194
Research Triangle Park, North Carolina 27709
                                                            10. PROGRAM ELEMENT NO.
              11. CONTRACT/GRANT NO.
                68-02-4326
12. SPONSORING AGENCY NAME AND ADDRESS
Office of Air Quality Planning and  Standards
J. S. Environmental  Protection Agency
Research Triangle Park, North Carolina  27711
              13. TYPE OF REPORT AND PERIOD COVERED
              14. SPONSORING AGENCY CODE
15. SUPPLEMENTARY NOTES
16. ABSTRACT
     ASPEN  is  an  acronym representing  "Advanced System  for Process Engineering," a
software package  designed to aid  in  engineering calculations.   Using these  features,
an ASPEN model  of a steam stripper has been developed.   Steam stripping  is  the
technology  under- consideration-by-the  EPA for- con-trol-ling  emissions from-wastewater.  -

     Although  ASPEN is a powerful tool, it is difficult and tedious to use.   The
purpose of  this diskette and user's  guide is to provide State and Federal EPA personnel
  th an easy to use front-end  program  for evaluating steam strippers.  The  program
prompts'the user  for inputs and creates an ASPEN input  file that can be  uploaded to
a VAX matin frame and executed.
 7.
                                KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
                                               b.lDENTIFIERS/OPEN ENDED TERMS
                           c.  COSATI Field/Group
Pollution  Control
Steam Stripping
Volatile Organic Compounds
Industrial  Wastewater
ASPEN
!\ir Pollution Control
Industrial Wastewater
18. DISTRIBUTION STATEMENT
Release  Limited to State  and Federal
Environmental Regulatory  Personnel
19. SECURITY CLASS jTMs Report)
Jnclassified
                                                                          21. NO. OF PAGES
52
20. SECURITY .CLASS (This page)
Unclassified
                           22. PRICE
EPA Form 2220-1 (R«v. 4-77)   PREVIOUS EDITION is OBSOLETE

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                                                        INSTRUCTIONS

   1.   REPORT NUMBER
       Insert the liPA report number as it appears on the cover of the publication.

   2.   LEAVE BLANK

   3.   RECIPIENTS ACCESSION NUMBER
       Reserved for use by each report recipient.

   4.   TITLE AND SUBTITLE
       Title should indicate clearly and briefly the subject coverage of the report, and be displayed prominently. Sot subtitle, if used, in smaller
       type or otherwise subordinate it to main title. When a report is prepared in more than one volume, repeat the primary title, add volume
       number and include subtitle for the specific title.

   5.   REPORT DATE
       Each report shall carry a date indicating at least  month and year.  Indicate the l>asis on which ii was selected (e.g.. dale <>J issue, dalv of
       approval, date of preparation, etc.).

   6.   PERFORMING ORGANIZATION CODE
       Leave blank.

   7.   AUTHOR(S)
       Give name(s) in conventional order (John R. Doe. J. Robert Doe. etc.}. List author's affiliation if it differs from Hie performing organi-
       zation.

   8.   PERFORMING ORGANIZATION REPORT NUMBER
       Insert if performing organization wishes to assign this number.

   9.   PERFORMING ORGANIZATION NAME AND ADDRESS
       Give name, street, city, state, and ZIP code. List no more than two levels of an organizational hircarchy.

   10.  PROGRAM ELEMENT NUMBER
       Use the program element number under which the report was prepared. Subordinate numbers may be included in parentheses.

   11.  CONTRACT/G RANT NUMBE R
       Insert contract or grant number under which report was prepared.

   12.  SPONSORING AGENCY NAME AND ADDRESS
       Include ZIP code.

   13.  TYPE OF REPORT AND PERIOD COVERED
       Indicate interim final, etc., and if applicable, dates covered.

   14.  SPONSORING AGtNCY CODE
       Insert appropriate code.

   16.  SUPPLEMENTARY NOTES
       Enter information not included elsewhere but useful, such as:  Prepared in cooperation with. Translation of. ('resented ui confcrciu-e "I.
       To be published in. Supersedes, Supplements, etc.

   16.  ABSTRACT
       Include a brief (200 words or less) factual summary of the most significant information contained in the report.  It the report ioniums u
       significant bibliography or literature survey, mention it here.

   17.  KEY WORDS AND DOCUMENT ANALYSIS
       (a) DESCRIPTORS - Select from the Thesaurus of Engineering and Scientific Terms the proper authori/.ed terms that identify  the major
       concept of the research and are sufficiently specific and precise to be used as index entries for cataloging.

       (b) IDENTIFIERS AND OPEN-ENDED TERMS - Use identifiers for project names, code names, equipment designators, etc. Use open-
       ended terms written in descriptor form for those subjects for which no descriptor exists.

       (c) COSATI HELD GROUP - Field and group assignments are to be taken from the 1965 COS ATI Subject Category List. Since the ma-
       jority of documents are multidisciplinary in nature, the Primary Field/Group assignmcnt(s) will be specific discipline, area of human
       endeavor, or type of physical object.  The application(s) will be cross-referenced with secondary Field/Group assignments that  will follow
       the primary posting(s).

   18.  DISTRIBUTION STATEMENT
       Denote releasability to the  public or limitation for reasons other than security for example "Release Unlimited."  Cite any availability ID
       the public, with address and price.

   19. & 20. SECURITY CLASSIFICATION
      . DO NOT submit classified reports to the National Technical Information service.           •                -  -

   21.  NUMBER OF PAGES
       Insert the total number of pages, including this one and unnumbered pages, but exclude distribution list, if any.

   22.  PRICE
       Insert the price set by the National Technical Information Service or the Government Printing Office, il known.
EPA Form 2220-1  (Rev. 4-77) (Reveri.)

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