aspen oli standard getting started 2006
TRANSCRIPT
-
8/3/2019 Aspen OLI Standard Getting Started 2006
1/93
A Guide to Using The Aspen OLI Interface An Overview of the Aspen OLI Interface 1-1
Chapter 1An Overview of theAspen OLI Interface
History
Dupont 25 year history using OLI electrolytes program.
1995 switched to Aspen as their process simulator.
Wanted the capability to use OLI electrolytes from ASPEN.
In 1996 Aspen V-8.2 was interfaced (no Model Manager)
In 1997 Aspen V-9.x with Model Manager.
Currently interfacing with Aspen PLUS V7 (2008)
Advantages of Aspen OLI User Interface
Learn one flowsheeting system
Multiple Property Options in same flowsheet
Well established Non-electrolyte capability
Sizing
Costing
Two Software Venders
-
8/3/2019 Aspen OLI Standard Getting Started 2006
2/93
1-2 An Overview of the Aspen OLI Interface A Guide to Using The Aspen OLI Interface
Disadvantages of Aspen OLI
No Corrosion No Bio-reactors
No Ion-exchange
No Surface Complexation
No Scaling Tendencies
Two Software Venders
Aspen OLI Interface Layout
Figure 1-1 The layout of the Aspen OLI Interface
-
8/3/2019 Aspen OLI Standard Getting Started 2006
3/93
A Guide to Using The Aspen OLI Interface An Overview of the Aspen OLI Interface 1-3
Aspen OLI Unit Operations
MIXERS
FSPLIT
SEP
SEP2
HEATER
FLASH2
FLASH3
HEATX
MHEATX
RADFRAC
RSTOIC
RYIELD
RCSTR
RPLUG
PUMP
COMPR
-
8/3/2019 Aspen OLI Standard Getting Started 2006
4/93
1-4 An Overview of the Aspen OLI Interface A Guide to Using The Aspen OLI Interface
Aspen Property Set
Figure 1-2 OLI Property Set, the circled areas show that OLI is enabled
-
8/3/2019 Aspen OLI Standard Getting Started 2006
5/93
A Guide to Using The Aspen OLI Interface An Overview of the Aspen OLI Interface 1-5
Property Route ID Property Route ID
PHIVMX PHIVMXO1 MUVMXL MUVMXLP1
PHILMX PHILMXO1 MUVLP MUVLP01
HVMX HVMXO1 KVMXLP KVMXLP01
HLMX HLMXO1 KVLP KVLP01
GVMX GVMXO1 DHV DHV00
GLMX GLMXO1 DHL DHL00
SVMX SVMXO1 DHLPC DHLPC00
SLMX SLMXO1 DGV DGV00
VVMX VVMXO1 DGL DGL00
VLMX VLMXO1 PHILPC PHILPC00
MUVMX MUVMX01 DSV DSV00
MULMX MULMX01 KVPC KVPC01
KVMX KVMX01
KLMX KLMX01
DVMX DVMX01
DLMX DLMX02
SIGLMX SIGLMX01
PHIV PHIV00
PHIL PHILO1HV HV00
HL HL00
GV GV00
GL GL00
SV SV00
SL SL00
VV VV00
VL VL01
MUV MUV01
MUL MUL01
KV KV01
KL KL01
DV DV01
DL DL01
SIGL SIGL01
HSMX HSMXO1
PHIL PHIL00
-
8/3/2019 Aspen OLI Standard Getting Started 2006
6/93
1-6 An Overview of the Aspen OLI Interface A Guide to Using The Aspen OLI Interface
Property Model Set OpCodes Affected
Properties
PHIVMX PHVMXOLI 1 PHIVMX
PHILMX PHLMXOLI 1 PHILMX
HVMX HVMXOLI 1 HVMX
HLMX HLMXOLI 1 HLMX
GVMX GVMXOLI 1 GVMX
GLMX GLMXOLI 1 GLMX
SVMX SVMXOLI 1 SVMX
SLMX SLMXOLI 1 SLMX
VVMX VVMXOLI 1 VVMX
VLMX VLMXOLI 1 VLMX
MUVMXL MUV2WILK 1 MUVMX
MUVLP MUV0CEB 1 MUVMX KVMX MUV KV
MULMX MUL2ANDR 1 MULMX
KVMXLP KV2WMSM 1 KVMX
KVLP KV0STLP 1 KVMX KV
KLMX KL2SRVR 1 KLMX
DVMX DV1CEWL 1 DVMX
DLMX DL1WCA 1 DLMXSIGLMX SIG2HSS 1 1 SIGLMX
PHIV ESIG0 1 PHIV GL SL
PHIL PHILOLI 1 PHIL
DHV ESIG0 1 HV HL SL
PL PL0XANT 1 HL GL SL
DHVL DHVLWTSN 1 HL SL
DHLPC DHLPC00 1 HL SL
DGV ESIG0 1 GV
PHILPC PHILPC00 1 GL SL
DSV ESIG0 1 SV
VV ESIG0 1 VV
VL VL0RKT 1 VL
MUL MUL0ANDR 1 MUL
KVPC KV0STPC 1 KV
VV ESRK0 1 KV
KL KL0SR 1 KL
DV DV0CEWL 1 DV
DL DL0WCA 1 DL
SIGL SIG0HSS 1 SIGL
HSMX HSMXOLI 1 HSMX
-
8/3/2019 Aspen OLI Standard Getting Started 2006
7/93
A Guide to Using The Aspen OLI Interface An Overview of the Aspen OLI Interface 1-7
Using the Aspen OLI Interface New property option in ASPEN named OLI:
PROPERTIES OLI CHEMISTRY=xxxxx TRUE-COMPS=YES
The following ASPEN paragraphs are created when the chemistrymodel is generated:
DATABANKS PROP-DATA
COMPONENTS PROPERTIES
CHEMISTRY PROP-SET pH
ASPEN user is then required to add the additional paragraphs to runthe simulation
such as:
FLOWSHEET
STREAMS
BLOCKS
ESP-NAME DB 8-CHAR ASP-ALIAS ASP-NAME
================ = ====== ========= ===========================
AR P AR AR ARGON
BCL3 V BCL3 BCL3 BORON-TRICHLORIDE
BF3 V BF3 BF3 BORON-TRIFLUORIDE
BR2 V BR2 BR2 BROMINE
CLNO V CLNO CLNO NITROSYL-CHLORIDE
CL2 P CL2 CL2 CHLORINE
PCL3 V PCL3 CL3P PHOSPHORUS-TRICHLORIDE
SICL4 V SICL4 CL4SI SILICON-TETRACHLORIDE
D2 V D2 D2 DEUTERIUM
D2O V D2O D2O DEUTERIUM-OXIDE
F2 V F2 F2 FLUORINE
NF3 V NF3 F3N NITROGEN-TRIFLUORIDE
SIF4 V SIF4 F4SI SILICON-TETRAFLUORIDE
SF6 V SF6 F6S SULFUR-HEXAFLUORIDE
HBR V HBR HBR HYDROGEN-BROMIDE
HCL P HCL HCL HYDROGEN-CHLORIDE
HF P HF HF HYDROGEN-FLUORIDE
AGION P AG+ AG+ AG+
AGCL2ION P AGCL2- AGCL2-2 AGCL2--AGSO4ION P AGSO4- AGSO4- AGSO4-
ALION P AL+3 AL+3 AL+++
ALFION P ALF+2 ALF+2 ALF++
ALF2ION P ALF2+ ALF2+ ALF2+
-
8/3/2019 Aspen OLI Standard Getting Started 2006
8/93
1-8 An Overview of the Aspen OLI Interface A Guide to Using The Aspen OLI Interface
Potential ProblemsMixing property options in the same flowsheet The user can mix
property options in the same flowsheet, using OLI in one block and anAspen sysopt such as SYSOP3 in another block. However, the user
must be aware of the potential problem of enthalpy mis-matches in
switching property options. Even though the base enthalpy for bothAspen and OLI is the heat of formation of the pure component at 25 C,
a mis-match will occur due to differences in heat capacity and excess
enthalpy calculations. If an isothermal calculation is made at the point
of property option change, the effect will be to have an artificial dutyon the block. An adiabatic calculation could cause major problems in
convergence and result in erroneous results.
Chemistry model location (xxxx.DBS file) By default ASPEN
looks for the .DBS file in the directory where the BKP file has beencreated.
8 Character Component Names at chemistry model generation, an 8character name will be created for each species and cross referenced to
both OLI component names and Aspen component names. This cross
referencing is made based on a table (OLIASP.XRF) supplied withthe installation. Do Not change the names after the chemistry model is
created. It is okay to add additional names to the components
paragraph providing these components will have zero flow rates forany block using the OLI property option.
Chemistry ParagraphThe chemistry paragraph created and placed inthe Aspen input file is only used by the RADFRAC block. All other
blocks chemistry is define by the information in the xxx.DBS file
Added Unit Blocks (OLI)
Four phase flash block (EFLASH)
OLI Distillation program (EFRACH)
Can only be used through command line (No Model Manager)
New run command (RUNASP)
Reads xxxx.ASP file and converts keyword input to positional input
and outputs xxxx.INP.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
9/93
A Guide to Using The Aspen OLI Interface An Overview of the Aspen OLI Interface 1-9
Executes the standard Aspen run command to run the simulation.
Figure 1-3 EFLASH unit operation
Figure 1-4 EFRACH Block
-
8/3/2019 Aspen OLI Standard Getting Started 2006
10/93
2-10 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Chapter 2ASPEN NeutralizationFlowsheet
A Tour of the OLI-ASPEN Interface
The following example is flowsheet simulation of an acid-base
neutralization process. An acid stream and a base stream are mixedtogether and then caustic is added to raise the pH to 9. Solid NACL is
added to precipitate out Na2SO4. The resulting stream is split,
removing 75% and recycling 25%.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
11/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-11
Generating Chemistry Model
There are two methods to create an OLI chemistry model to be used with Aspen PLUS. These are the Chemistry Wizard
and the OLI Engine1. We will concentrate on the OLI Chemistry Wizard.
Use the Start Button and locate the OLI Chemistry Wizard. Typical installation paths will put the program here:
Start > Programs > AspenTech > Aspen Engineering Suite> Aspen OLI 2006.5
Figure 2-1 The Aspen OLI Splash Screen
This screen will close on its own in a few seconds or you can click to clear the image.
1 The OLI Engine chemistry generator is supplied with the OLI Alliance Suite for Aspen PLUS and is very similar to the
chemistry generator used for ESP. This will be shown in Chapter 6.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
12/93
2-12 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
The Chemistry Wizard information dialog is now displayed. You can enter the name of the model and change the
location where the model files will be located. Here we will enter the nameNeutral1for the model name and change the
location of the files.
Figure 2-2 Specifying the model name and location
Click theNext> button to continue
Figure 2-3 Chemistry Model name
specified
-
8/3/2019 Aspen OLI Standard Getting Started 2006
13/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-13
Here we can select the thermodynamic framework. There are two offered by OLI. The traditional aqueous model and the
mixed-solvent electrolyte framework. This latter framework is also known as the H3O+ (hydronium ion) framework.2We can also select databases in addition to the PUBLIC database. These databases listed contain data that limited to a
more specific region of thermodynamic space than the PUBLIC database or contains data that is missing from the public
database. For this example we will only use the PUBLIC database.
Click theNext> button to continue
2 We will discuss the MSE framework in Chapter 7
Figure 2-4 Selecting thermodynamic framework and
databases
-
8/3/2019 Aspen OLI Standard Getting Started 2006
14/93
2-14 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-5 Adding components
We are now ready to add the components for this example. Click theAddbutton.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
15/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-15
Figure 2-6 Select Components
We now need to add our components of ammonia (NH3), carbon dioxide (CO2), sulfur dioxide (SO2), hydrochloric
acid (HCL), sulfuric acid (H2SO4) and sodium hydroxide (NAOH).
We can scroll through the list or enter the component ID and let the software find the component. We will try the latter
technique, enter the component ID NH3
-
8/3/2019 Aspen OLI Standard Getting Started 2006
16/93
2-16 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-7 Adding NH3, ammonia
You can see that the screen automatically scrolled as you entered letters. The current component NH3 is highlighted.
Click theAddbutton. Repeat this action for the remaining components. Click the Close button when done.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
17/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-17
Figure 2-8 the added components
Click theNext> button.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
18/93
2-18 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-9 adding redox
On this screen we can add oxidation and reduction to the chemistry. We will not do so for this example. Click theNext>
button.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
19/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-19
Figure 2-10 Selecting phases, including solids
On this screen we can enable vapor and second liquid (non-aqueous) phases. By default the vapor phase is enabled and
the second liquid phase is disabled. We can also turn off all potential solid phases or select individual solids to exclude.
Occasionally the user will have prior knowledge of which solid phases will be present. Eliminating solids that are not
possible can dramatically increase the execution speed of the program.
ClickNext> to continue.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
20/93
2-20 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-11 Aspen Alias names
Many times OLI will have a component that Aspen PLUS will not. For those cases an alias name has to be provided to
allow the two programs to properly communicate. As you can see in this example, there is no AspenPLUS alias for
NAOH. We must provide one. Enter the alias NAOH.
Figure 2-12 Alias Entered
-
8/3/2019 Aspen OLI Standard Getting Started 2006
21/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-21
Click theNext> button.
Figure 2-13 BKP file options
OLI initially communicates to Aspen PLUS via the BKP file. We will shortly create a flowsheet without any unit
operations. The BKP file will initially have the same name as the chemistry model but you may change the name if youwish. A second option is to allow the solid salts to precipitate. This is the default option. Alternatively you can
dramatically increase the speed of execution by setting the salts to be dissociated. It is recommended for OLI models that
you accept the default choices.
Click theNext> button.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
22/93
2-22 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-14 Almost done
We are almost done with the chemistry model generation. This is the summary screen of what we have selected. Please
review it to make sure you have made the choices you require. Click the Generate Files Now button.
If the model was successfully generated you will receive this message:
Figure 2-15 completed
Click the OKbutton.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
23/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-23
Figure 2-16 Done
We are now done with the chemistry model generation. Notice that the Generate Files Now button and theNext> button
are gray. Click theFinish button.
We create a BKP file and an ASP file. We will use the BKP file in a moment. The ASP file is the old Aspen INP file.We have renamed the file from INP to ASP since OLI also uses a file with extension INP.
3Here is the contents of the
file. It can be renamed to INP to be used with the Aspen PLUS Simulation Engine.
File NEUTRAL.ASP
TITLE " "
;
DESCRIPTION " "
;
RUN-CONTROL MAX-TIME=36000
;
HISTORY MSG-LEVEL SIM-LEVEL=4 STREAM-LEVEL=4
;
IN-UNITS ENG
OUT-UNITS ENG
;
DATABANKS ASPENPCD /SOLIDS /AQUEOUS /PURECOMP /INORGANIC
;
COMPONENTS H2O H2O / CO2 CO2 / H2SO4 H2SO4 / HCL HCL / NH3 H3N /
3 The INP file is used with OLIs ProChem software.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
24/93
2-24 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
SO2 O2S / SO3 O3S / NAHCO3 NAHCO3 / H2SO4IN H2SO4 /
NAOH NAOH / NACO3W10 "NA2CO3.10H2O" / NACO3W1 "NA2CO3.H2O" /
NACO3W7 "NA2CO3.7H2O" / NA2CO3 NA2CO3 / NA2SO3W7 /
NA2SO3 / NA2STW10 / NA2SO4 NA2SO4 / NA3SO4 /
NASCO3 / NACL NACL / NAHSO4 / NANH4SW4 / NAOHW1 /
NH42SUW1 / NH4SO3 H8N2O3S / NH4SO4 "(NH4)2SO4" /
NH44H2 / NH4CL NH4CL / NH4HCO / NH5SO3 H5NO3S /
H2CO3IN H2CO3 / H2SO3IN H2SO3 / HNH2CO2 / NAHSO3IN /
NANH2CO2 / NANH4SO4 / NH42CO3 / NH4OHIN NH4OH /
NA2CO3-S NA2CO3 / NA2SO3-S / NA2SO4-S NA2SO4 /
NA3SO4-S / NASCO3-S / NACL-S NACL / NAHCO3-S NAHCO3 /
NAHSO4-S / NAOH-S NAOH / NH4SO3-S H8N2O3S /
NH4SO4-S "(NH4)2SO4" / NH44H2-S / NH4CL-S NH4CL /
NH4HCO-S / NH5SO3-S H5NO3S / OH- OH- / CO3-2 CO3-2 /
HCO3- HCO3- / H+ H+ / HSO3- HSO3- / HSO4- HSO4- /
NACO3- NACO3- / NA+ NA+ / NASO4- NASO4- / NH2CO2- NH2COO- /
NH4+ NH4+ / NH4SO4- / CL- CL- / S2O5-2 / SO3-2 SO3-2 /
SO4-2 SO4-2
;
CHEMISTRY neutral
PARAM KBASIS=MOLALSTOIC 1 CO2 -1/H2O -1/H+ 1/HCO3- 1
STOIC 2 HCO3- -1/H+ 1/CO3-2 1
STOIC 3 HSO3- -1/H+ 1/SO3-2 1
STOIC 4 HSO4- -1/H+ 1/SO4-2 1
STOIC 5 NACO3- -1/NA+ 1/CO3-2 1
STOIC 6 NAHCO3 -1/NA+ 1/HCO3- 1
STOIC 7 NASO4- -1/NA+ 1/SO4-2 1
STOIC 8 NH2CO2- -1/H2O -1/NH3 1/HCO3- 1
STOIC 9 NH3 -1/H2O -1/NH4+ 1/OH- 1
STOIC 10 H2SO4 -1/H+ 1/HSO4- 1
STOIC 11 NH4SO4- -1/NH4+ 1/SO4-2 1
STOIC 12 S2O5-2 -1/H2O -1/SO3-2 2/H+ 2
STOIC 13 SO2 -1/H2O -1/HSO3- 1/H+ 1STOIC 14 H2O -1/H+ 1/OH- 1
STOIC 15 SO3 -1/H2O -1/H2SO4 1
STOIC 16 HCL -1/H+ 1/CL- 1
DISS NAOH OH- 1/NA+ 1
DISS NACO3W10 OH- 10/CO3-2 1/H+ 10/NA+ 2
DISS NACO3W1 OH- 1/CO3-2 1/H+ 1/NA+ 2
DISS NACO3W7 OH- 7/CO3-2 1/H+ 7/NA+ 2
DISS NA2CO3 CO3-2 1/NA+ 2
DISS NA2SO3W7 OH- 7/H+ 7/NA+ 2/SO3-2 1
DISS NA2SO3 NA+ 2/SO3-2 1
DISS NA2STW10 OH- 10/H+ 10/NA+ 2/SO4-2 1
DISS NA2SO4 NA+ 2/SO4-2 1
DISS NA3SO4 H+ 1/NA+ 3/SO4-2 2DISS NASCO3 CO3-2 1/NA+ 6/SO4-2 2
DISS NACL NA+ 1/CL- 1
DISS NAHSO4 H+ 1/NA+ 1/SO4-2 1
DISS NANH4SW4 OH- 4/H+ 4/NA+ 2/NH4+ 2/SO4-2 2
DISS NAOHW1 OH- 2/H+ 1/NA+ 1
DISS NH42SUW1 OH- 1/H+ 1/NH4+ 2/SO3-2 1
DISS NH4SO3 NH4+ 2/SO3-2 1
DISS NH4SO4 NH4+ 2/SO4-2 1
DISS NH44H2 CO3-2 3/H+ 2/NH4+ 4
-
8/3/2019 Aspen OLI Standard Getting Started 2006
25/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-25
DISS NH4CL NH4+ 1/CL- 1
DISS NH4HCO CO3-2 1/H+ 1/NH4+ 1
DISS NH5SO3 H+ 1/NH4+ 1/SO3-2 1
DISS H2CO3IN CO3-2 1/H+ 2
DISS H2SO3IN H+ 2/SO3-2 1
DISS HNH2CO2 OH- -1/CO3-2 1/NH4+ 1
DISS NAHSO3IN H+ 1/NA+ 1/SO3-2 1
DISS NANH2CO2 OH- -1/CO3-2 1/H+ -1/NA+ 1/NH4+ 1
DISS NANH4SO4 NA+ 2/NH4+ 2/SO4-2 2
DISS NH42CO3 CO3-2 1/NH4+ 2
DISS NH4OHIN OH- 1/NH4+ 1
DISS NA2CO3-S CO3-2 1/NA+ 2
DISS NA2SO3-S NA+ 2/SO3-2 1
DISS NA2SO4-S NA+ 2/SO4-2 1
DISS NA3SO4-S H+ 1/NA+ 3/SO4-2 2
DISS NASCO3-S CO3-2 1/NA+ 6/SO4-2 2
DISS NACL-S NA+ 1/CL- 1
DISS NAHCO3-S CO3-2 1/H+ 1/NA+ 1
DISS NAHSO4-S H+ 1/NA+ 1/SO4-2 1
DISS NAOH-S OH- 1/NA+ 1
DISS NH4SO3-S NH4+ 2/SO3-2 1DISS NH4SO4-S NH4+ 2/SO4-2 1
DISS NH44H2-S CO3-2 3/H+ 2/NH4+ 4
DISS NH4CL-S NH4+ 1/CL- 1
DISS NH4HCO-S CO3-2 1/H+ 1/NH4+ 1
DISS NH5SO3-S H+ 1/NH4+ 1/SO3-2 1
K-STOIC 1 274.31 -13854 -42.555 1.26650E-09
K-STOIC 2 187.89 -10927 -30.72 9.80730E-10
K-STOIC 3 231.43 -10086 -37.594 1.18890E-09
K-STOIC 4 222.04 -7989.4 -35.068 1.06350E-09
K-STOIC 5 146.5 -8492.5 -20.936 6.44280E-10
K-STOIC 6 931.09 -26379 -159.1 .21713
K-STOIC 7 167.69 -2587.2 -31.331 6.52430E-02
K-STOIC 8 6.5771 -2185.6 -2.02270E-09 2.48690E-12K-STOIC 9 169.08 -8411.8 -26.647 7.67190E-10
K-STOIC 10 -6.3869 -716.49 7.0386 -2.46280E-02
K-STOIC 11 172.22 -7652 -26.17 7.97980E-10
K-STOIC 12 375.49 -16207 -60.24 1.84300E-09
K-STOIC 13 53.382 -487.64 -9.762 2.87800E-10
K-STOIC 14 161.47 -14333 -25.56 8.03310E-10
K-STOIC 15 214.15 -8208.5 -31.183 9.98140E-10
K-STOIC 16 1221.6 -30089 -209.99 .30227
;
PROP-DATA neutral
PROP-LIST MW / CHARGE
PVAL H2O 18.0154 / .00
PVAL CO2 44.0099 / .00PVAL H2SO4 98.0796 / .00
PVAL HCL 36.4610 / .00
PVAL NH3 17.0307 / .00
PVAL SO2 64.0650 / .00
PVAL SO3 80.0642 / .00
PVAL NAHCO3 84.0073 / .00
PVAL H2SO4IN 98.0796 / .00
PVAL NAOH 39.9974 / .00
PVAL NACO3W10 286.1400 / .00
-
8/3/2019 Aspen OLI Standard Getting Started 2006
26/93
2-26 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
PVAL NACO3W1 124.0050 / .00
PVAL NACO3W7 232.0970 / .00
PVAL NA2CO3 105.9890 / .00
PVAL NA2SO3W7 252.1500 / .00
PVAL NA2SO3 126.0400 / .00
PVAL NA2STW10 322.2000 / .00
PVAL NA2SO4 142.0400 / .00
PVAL NA3SO4 262.1100 / .00
PVAL NASCO3 390.0800 / .00
PVAL NACL 58.4430 / .00
PVAL NAHSO4 120.0620 / .00
PVAL NANH4SW4 346.2470 / .00
PVAL NAOHW1 58.0128 / .00
PVAL NH42SUW1 134.1570 / .00
PVAL NH4SO3 116.1420 / .00
PVAL NH4SO4 132.1410 / .00
PVAL NH44H2 254.1990 / .00
PVAL NH4CL 53.4917 / .00
PVAL NH4HCO 79.0560 / .00
PVAL NH5SO3 99.1109 / .00
PVAL H2CO3IN 62.0253 / .00PVAL H2SO3IN 82.0802 / .00
PVAL HNH2CO2 61.0406 / .00
PVAL NAHSO3IN 104.0620 / .00
PVAL NANH2CO2 83.0226 / .00
PVAL NANH4SO4 274.1840 / .00
PVAL NH42CO3 96.0867 / .00
PVAL NH4OHIN 35.0461 / .00
PVAL NA2CO3-S 105.9890 / .00
PVAL NA2SO3-S 126.0400 / .00
PVAL NA2SO4-S 142.0400 / .00
PVAL NA3SO4-S 262.1100 / .00
PVAL NASCO3-S 390.0800 / .00
PVAL NACL-S 58.4430 / .00PVAL NAHCO3-S 84.0073 / .00
PVAL NAHSO4-S 120.0620 / .00
PVAL NAOH-S 39.9974 / .00
PVAL NH4SO3-S 116.1420 / .00
PVAL NH4SO4-S 132.1410 / .00
PVAL NH44H2-S 254.1990 / .00
PVAL NH4CL-S 53.4917 / .00
PVAL NH4HCO-S 79.0560 / .00
PVAL NH5SO3-S 99.1109 / .00
PVAL OH- 17.0074 / -1.00
PVAL CO3-2 60.0093 / -2.00
PVAL HCO3- 61.0173 / -1.00
PVAL H+ 1.0080 / 1.00PVAL HSO3- 81.0722 / -1.00
PVAL HSO4- 97.0716 / -1.00
PVAL NACO3- 82.9993 / -1.00
PVAL NA+ 22.9900 / 1.00
PVAL NASO4- 119.0500 / -1.00
PVAL NH2CO2- 60.0326 / -1.00
PVAL NH4+ 18.0387 / 1.00
PVAL NH4SO4- 114.1020 / -1.00
PVAL CL- 35.4530 / -1.00
-
8/3/2019 Aspen OLI Standard Getting Started 2006
27/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-27
PVAL S2O5-2 144.1290 / -2.00
PVAL SO3-2 80.0642 / -2.00
PVAL SO4-2 96.0636 / -2.00
PROP-LIST PLXANT
PVAL NA2SO3W7 -1D15
PVAL NA2SO3 -1D15
PVAL NA2STW10 -1D15
PVAL NA3SO4 -1D15
PVAL NASCO3 -1D15
PVAL NAHSO4 -1D15
PVAL NANH4SW4 -1D15
PVAL NAOHW1 -1D15
PVAL NH42SUW1 -1D15
PVAL NH44H2 -1D15
PVAL NH4HCO -1D15
PVAL HNH2CO2 -1D15
PVAL NAHSO3IN -1D15
PVAL NANH2CO2 -1D15
PVAL NANH4SO4 -1D15
PVAL NH42CO3 -1D15
PVAL NA2SO3-S -1D15PVAL NA3SO4-S -1D15
PVAL NASCO3-S -1D15
PVAL NAHSO4-S -1D15
PVAL NH44H2-S -1D15
PVAL NH4HCO-S -1D15
PVAL OH- -1D15
PVAL CO3-2 -1D15
PVAL HCO3- -1D15
PVAL H+ -1D15
PVAL HSO3- -1D15
PVAL HSO4- -1D15
PVAL NACO3- -1D15
PVAL NA+ -1D15PVAL NASO4- -1D15
PVAL NH2CO2- -1D15
PVAL NH4+ -1D15
PVAL NH4SO4- -1D15
PVAL CL- -1D15
PVAL S2O5-2 -1D15
PVAL SO3-2 -1D15
PVAL SO4-2 -1D15
;
PROP-SET PH PH SUBSTREAM=MIXED PHASE=L
STREAM-REPOR PROPERTIES=PH
;
;PROPERTIES OLI CHEMISTRY=neutral TRUE-COMPS=YES
;
FLOWSHEET
PROP-SET PH PH SUBSTREAM=MIXED PHASE=L
STREAM-REPOR PROPERTIES=PH
;
;
PROPERTIES OLI CHEMISTRY=dea TRUE-COMPS=YES
-
8/3/2019 Aspen OLI Standard Getting Started 2006
28/93
2-28 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
;
FLOWSHEET
;
-
8/3/2019 Aspen OLI Standard Getting Started 2006
29/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-29
Creating the Aspen Flowsheet
It is beyond the scope of this manual to instruct the user in how to run Aspen PLUS. We will just concentrate on the
issues unique to OLI. Start Aspen PLUS in the normal manner.
We first need to load the BKP file we just created.
Figure 2-17 Locating the BKP file
SelectMore Files and then click the OKbutton.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
30/93
2-30 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-18 standard windows open dialog
Locate the folder where you stored the OLI Chemistry Wizard files and the BKP file. Select the file and clickOpen.
Accept whatever local or network setting you must to activate the Aspen PLUS program. You may see the following
warning:
Figure 2-19 Compatibility warning
-
8/3/2019 Aspen OLI Standard Getting Started 2006
31/93
-
8/3/2019 Aspen OLI Standard Getting Started 2006
32/93
2-32 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Figure 2-21 Neutral 1 Process
This process mixes a basic stream (1) with an acidic stream (2) adiabatically in block B1. The resultant vapor stream (3)
is drawn off and the mixed liquid (4) is neutralized with a sodium hydroxide stream (5) adiabatically in block B2. A
design specification is that stream 7 is to be held to a pH of 9.0 within 0.01 pH units.
The following tables contain the Stream conditions:
Stream 1 2 5
Temperature (oC) 40 25 30
Pressure (atm) 1 1 1
Total flow (lbmole/hr) 200 150 100
H2O (lbmole/hr) 55.5 55.5 55.5
NH3 1 0 0
CO2 0.1 0 0
SO2 0.1 0 0
HCL 0 0.1 0
H2SO4 0 1.0 0
NAOH 0 0 1
Block B1 B2
Duty (Btu/hr) 0 0
Pressure (atm) 1 1
Design Specification DS-1
Variable Name PH
Target 9.0
Tolerance 0.01
-
8/3/2019 Aspen OLI Standard Getting Started 2006
33/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-33
Vary Stream 5
Vary Option Substream: Mixed
Variable: Mole-Flow
Lower Bound: 50
Upper Bound: 400
-
8/3/2019 Aspen OLI Standard Getting Started 2006
34/93
2-34 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
Stream Results4
STREAM ID 1 2 3 4 5
FROM : ---- ---- B1 B1 ----
TO : B1 B1 ---- B2 B2
SUBSTREAM: MIXEDPHASE: LIQUID LIQUID VAPOR LIQUID LIQUID
COMPONENTS: LBMOL/HR
H2O 195.1984 147.0848 1.7495-02 342.7762 238.4520
CO2 7.4400-05 0.0 0.2253 0.1274 0.0
H2SO4 0.0 9.5892-11 1.2006-18 2.2351-12 0.0
HCL 0.0 1.4492-07 1.2374-09 1.7257-08 0.0
NH3 2.2617 0.0 4.4208-11 3.4397-08 0.0
SO2 2.1473-11 0.0 1.5688-02 0.2787 0.0
SO3 0.0 1.2960-14 8.8815-26 3.5616-16 0.0
OH- 3.3320-04 4.7653-14 0.0 3.4755-12 4.2964
CO3-2 7.0989-02 0.0 0.0 5.4107-15 0.0
HCO3- 0.1447 0.0 0.0 1.5760-06 0.0
H+ 2.2192-09 3.3210 0.0 0.7119 1.4728-13
HSO3- 6.9235-04 0.0 0.0 5.8330-02 0.0HSO4- 0.0 2.2444 0.0 1.3844 0.0
NACO3- 0.0 0.0 0.0 0.0 0.0
NA+ 0.0 0.0 0.0 0.0 4.2964
NASO4- 0.0 0.0 0.0 0.0 0.0
NH2CO2- 0.1369 0.0 0.0 1.2593-14 0.0
NH4+ 1.1288 0.0 0.0 2.9902 0.0
NH4SO4- 0.0 0.0 0.0 0.5372 0.0
CL- 0.0 0.2650 0.0 0.2650 0.0
S2O5-2 5.2967-12 0.0 0.0 2.6261-08 0.0
SO3-2 0.3520 0.0 0.0 2.2342-07 0.0
SO4-2 0.0 0.4058 0.0 0.7286 0.0
TOTAL FLOW:
LBMOL/HR 199.2946 153.3210 0.2585 349.8579 247.0449
LB/HR 3625.0069 2919.3737 11.2377 6533.1429 4467.6404
CUFT/HR 58.1387 44.1667 105.4193 102.1074 69.2293STATE VARIABLES:
TEMP F 104.0000 77.0000 101.6219 101.6219 86.0000
PRES PSIA 14.6959 14.6959 14.6959 14.6959 14.6959
VFRAC 0.0 0.0 1.0000 0.0 0.0
LFRAC 1.0000 1.0000 0.0 1.0000 1.0000
SFRAC 0.0 0.0 0.0 0.0 0.0
ENTHALPY:
BTU/LBMOL -1.2163+05 -1.2471+05 -1.6215+05 -1.2382+05 -1.2203+05
BTU/LB -6686.9719 -6549.3512 -3730.4042 -6630.5609 -6747.8760
BTU/HR -2.4240+07 -1.9120+07 -4.1921+04 -4.3318+07 -3.0147+07
ENTROPY:
BTU/LBMOL-R 17.5169 16.3523 51.5567 17.4718 16.3944
BTU/LB-R 0.9630 0.8588 1.1861 0.9356 0.9066
DENSITY:
LBMOL/CUFT 3.4279 3.4714 2.4524-03 3.4264 3.5685LB/CUFT 62.3510 66.0989 0.1066 63.9831 64.5340
AVG MW 18.1892 19.0409 43.4679 18.6737 18.0843
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***
PH 9.3417 -1.0102-02 MISSING 1.1326 13.7227
4 Many zero rows have been eliminated from this report.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
35/93
A Guide to Using The Aspen OLI Interface ASPEN Neutralization Flowsheet 2-35
6 7
---
STREAM ID 6 7
FROM : B2 B2
TO : ---- ----
SUBSTREAM: MIXED
PHASE: MISSING LIQUID
COMPONENTS: LBMOL/HR
H2O 0.0 585.1336
CO2 0.0 8.3178-05
H2SO4 0.0 9.9321-28
HCL 0.0 2.6412-16
NH3 0.0 1.4203
SO2 0.0 7.8798-11
SO3 0.0 1.6100-31
NAHCO3 0.0 8.2460-03
OH- 0.0 4.4950-04
CO3-2 0.0 1.9644-02
HCO3- 0.0 8.1566-02
H+ 0.0 1.7588-08
HSO3- 0.0 1.2553-03
HSO4- 0.0 4.8461-08
NACO3- 0.0 2.3798-03
NA+ 0.0 3.6208
NASO4- 0.0 0.6650
NH2CO2- 0.0 1.5469-02
NH4+ 0.0 1.7011
NH4SO4- 0.0 0.3904
CL- 0.0 0.2650
S2O5-2 0.0 6.8489-12
SO3-2 0.0 0.3358
SO4-2 0.0 1.5947
TOTAL FLOW:
LBMOL/HR 0.0 595.2559
LB/HR 0.0 1.1001+04CUFT/HR 0.0 172.4779
STATE VARIABLES:
TEMP F MISSING 103.9126
PRES PSIA 14.6959 14.6959
VFRAC MISSING 0.0
LFRAC MISSING 1.0000
SFRAC MISSING 0.0
ENTHALPY:
BTU/LBMOL MISSING -1.2342+05
BTU/LB MISSING -6678.2049
BTU/HR MISSING -7.3465+07
ENTROPY:
BTU/LBMOL-R MISSING 17.3887
BTU/LB-R MISSING 0.9409
DENSITY:LBMOL/CUFT MISSING 3.4512
LB/CUFT MISSING 63.7808
AVG MW MISSING 18.4808
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***
PH MISSING 9.0018
-
8/3/2019 Aspen OLI Standard Getting Started 2006
36/93
2-36 ASPEN Neutralization Flowsheet A Guide to Using The Aspen OLI Interface
-
8/3/2019 Aspen OLI Standard Getting Started 2006
37/93
A Guide to Using The Aspen OLI Interface ASPEN Emergency Chlorine Scrubber Flowsheet 3-37
Chapter 3ASPEN EmergencyChlorine Scrubber Flowsheet
A Tour of the OLI-ASPEN Interface (RADFRAC example)
The following example is a simulation of a Chlorine scrubber. Caustic is used to remove chlorine from a gas stream.
The caustic feed rate to the column is adjusted to reduce the chlorine in the column overhead gas to .5 moles/hr.
Generating Chemistry Model
Using the OLI Chemistry Wizard, create a chemistry model with the following components. We recommend the name of
the model to be CHLORINE
H2O, CO2, CL2, N2, NAOH
-
8/3/2019 Aspen OLI Standard Getting Started 2006
38/93
3-38 ASPEN Emergency Chlorine Scrubber Flowsheet A Guide to Using The Aspen OLI Interface
Creating the Aspen Flowsheet
Start Aspen normally and open the Chlroine.BKP file just created.
Create the following flowsheet using the Model Manager
-
8/3/2019 Aspen OLI Standard Getting Started 2006
39/93
A Guide to Using The Aspen OLI Interface ASPEN Emergency Chlorine Scrubber Flowsheet 3-39
Caustic Feed Stream (Stream 1)
Feed Stream (Stream 2)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
40/93
3-40 ASPEN Emergency Chlorine Scrubber Flowsheet A Guide to Using The Aspen OLI Interface
RADFRAC (Block B1) configuration (5 stages)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
41/93
A Guide to Using The Aspen OLI Interface ASPEN Emergency Chlorine Scrubber Flowsheet 3-41
RADFRAC (Block B1) streams
RADFRAC (Block B1) pressure
-
8/3/2019 Aspen OLI Standard Getting Started 2006
42/93
3-42 ASPEN Emergency Chlorine Scrubber Flowsheet A Guide to Using The Aspen OLI Interface
RADFRAC (Block B1) estimates
-
8/3/2019 Aspen OLI Standard Getting Started 2006
43/93
A Guide to Using The Aspen OLI Interface ASPEN Emergency Chlorine Scrubber Flowsheet 3-43
Design Specs for BLOCK B2
Enter a value of 0.5 for the target. Now click on the Component tab.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
44/93
3-44 ASPEN Emergency Chlorine Scrubber Flowsheet A Guide to Using The Aspen OLI Interface
Vary flow rate of feed stream 1 to meet spec.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
45/93
A Guide to Using The Aspen OLI Interface ASPEN Emergency Chlorine Scrubber Flowsheet 3-45
Stream Results
STREAM ID 1 2 3 4
FROM : ---- ---- B1 B1
TO : B1 B1 ---- ----
SUBSTREAM: MIXED
PHASE: LIQUID VAPOR VAPOR LIQUID
COMPONENTS: KMOL/HR
H2O 42.3882 2.2700 4.0678 41.0068
CO2 0.0 23.5900 23.5385 4.8665-03
CL2 0.0 2.2700 0.5000 7.7402-04
HCLO 0.0 0.0 0.2696 1.0831
HCL 0.0 0.0 2.1360-11 1.2358-13
N2 0.0 26.3000 26.2998 1.1769-04
NAHCO3 0.0 0.0 1.1913-32 1.0916-02
OH- 2.2323 0.0 0.0 5.5139-08
CLO- 0.0 0.0 3.3964-31 0.4163
CO3-2 0.0 0.0 2.2146-34 9.2892-05
HCO3- 0.0 0.0 3.2250-32 3.5561-02H+ 5.3037-15 0.0 0.0 1.5311-07
NACO3- 0.0 0.0 8.1993-35 4.4784-05
NA+ 2.2323 0.0 1.0213-30 2.2213
CL- 0.0 0.0 6.4892-31 1.7692
TOTAL FLOW:
KMOL/HR 46.8528 54.4300 54.6759 46.5493
KG/HR 852.9278 1976.7975 1895.5620 934.1633
CUM/SEC 2.1555-04 0.3752 0.3926 2.3400-04
STATE VARIABLES:
TEMP C 24.9999 32.9999 42.6071 31.2537
PRES ATM 1.0100 1.0100 1.0000 1.0000
VFRAC 0.0 1.0000 1.0000 0.0
LFRAC 1.0000 0.0 0.0 1.0000SFRAC 0.0 0.0 0.0 0.0
ENTHALPY:
J/KMOL -2.8099+08 -1.8051+08 -1.8734+08 -2.7385+08
J/KG -1.5435+07 -4.9703+06 -5.4036+06 -1.3646+07
WATT -3.6570+06 -2.7292+06 -2.8452+06 -3.5410+06
ENTROPY:
J/KMOL-K 6.6357+04 2.0318+05 0.0 7.7057+04
J/KG-K 3645.1194 5594.4265 0.0 3839.7604
DENSITY:
KMOL/CUM 60.3776 4.0294-02 3.8677-02 55.2568
KG/CUM 1099.1373 1.4634 1.3408 1108.9084
AVG MW 18.2043 36.3181 34.6690 20.0682
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***
PH 14.4320 MISSING MISSING 6.6944
-
8/3/2019 Aspen OLI Standard Getting Started 2006
46/93
4-46 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Chapter 4ASPEN Amine GasCleanup Flowsheet
A Tour of the OLI-ASPEN Interface
The following example is a flowsheet simulation to remove H2S and
CO2 from a hydrocarbon stream using DEA. The H2S and CO2 are
absorbed in a column by the DEA at a pressure of 20 atmospheres.The pressure is let down to 1.5 atmospheres in a flash drum. The H2S
and CO2 are then stripped from the DEA in a column by heating. The
clean DEA is then recycled back to the absorber. Both water and DEAare added as make-up streams
-
8/3/2019 Aspen OLI Standard Getting Started 2006
47/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-47
Generating Chemistry Model
Create a chemistry model using the OLI Chemistry Wizard for Aspen PLUS. We recommend that the name of the
model be called DEA. Enter the component names: H2O, CO2, H2S, CH4, C2H6, C3H8, C4H10, and DEXH5
When done entering the component names, click theNext button to continue. You may be required to fill in some blank
names on the AspenPlus Component ID & Alias dialog. If so, use the same name as the AspenPlus ID
Figure 4-1 Missing Aspen Alias
Figure 4-2 Filled in Alias
5 This the OLI name for diethanolamine.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
48/93
4-48 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Click theNext button until the model is complete. Click theFinish button when it presents itself.
The Aspen backup format file will be created and will be named DEA.BKP. This file can be opened in ASPEN Model
Manager.
Creating the Aspen FlowsheetStart up the ASPEN PLUS by double clicking on the ASPEN icon:
Select more files and locate the filedea.bkp and open this file.
Select Data on the action bar, then Components should show the species created from ESP.
Create the following flowsheet using the Model Manager
Block B1 - RADFRAC Block B2 - RADFRAC
Block B3 - FLASH2 Block B4 - MIXER
Block B6 - HEATER
-
8/3/2019 Aspen OLI Standard Getting Started 2006
49/93
-
8/3/2019 Aspen OLI Standard Getting Started 2006
50/93
4-50 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Dea Make-up Stream (Stream 12)
Tear Stream Guess (Stream 6)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
51/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-51
Dea Absorber RADFRAC (Block B1) configuration
Dea Absorber RADFRAC (Block B1) streams
The Feed and Product stages may
appear in a different order depending on
how you created the flowsheet.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
52/93
4-52 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Dea Absorber RADFRAC (Block B1) pressure
Dea Absorber RADFRAC (Block B1) estimates
-
8/3/2019 Aspen OLI Standard Getting Started 2006
53/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-53
Dea Absorber RADFRAC (Block B1) convergence
-
8/3/2019 Aspen OLI Standard Getting Started 2006
54/93
4-54 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Flash Tank FLASH2 (Block B3)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
55/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-55
Dea Stripper RADFRAC (Block B2) configuration
Dea Stripper RADFRAC (Block B2) streams
The Feed and Product stages may
appear in a different order depending on
how you created the flowsheet.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
56/93
4-56 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Dea Stripper RADFRAC (Block B2) pressure
-
8/3/2019 Aspen OLI Standard Getting Started 2006
57/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-57
Dea Stripper RADFRAC (Block B2) estimates
-
8/3/2019 Aspen OLI Standard Getting Started 2006
58/93
4-58 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Dea Stripper RADFRAC (Block B2) convergence
-
8/3/2019 Aspen OLI Standard Getting Started 2006
59/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-59
Add Make up Water MIXER (Block B4)
Add Make up DEA HEATER (Block B6)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
60/93
4-60 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
We will now add a design specification to control the amount of water in the process. Open the Data Browser and find
the Flowsheeting options. Open the Flowsheeting options toDesign Spec
Click theNew button and enter the ID ofDS-1
Enter the name for the water flow rate as WATFL.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
61/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-61
Click off the variable name and then reselect it. Then click theEdit button. Make the changes as indicated:
-
8/3/2019 Aspen OLI Standard Getting Started 2006
62/93
4-62 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Click the close button.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
63/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-63
Design_Spec DS-1 spec
-
8/3/2019 Aspen OLI Standard Getting Started 2006
64/93
4-64 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Design_Spec DS-1 vary
We will now create a second design specification to control the amount of diethanolamine (DEXH) in the recycle loop.
Click on theDesign Spec category in the tree view.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
65/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-65
Click the Newbutton.
Accept the default name for the design specification and then click the OKbutton. We will now define three variables
for diethanolamine. These variables represent the three forms of diethanolamine in the process. The first is the variable
DEXFL which is defined to be the neutral form of diethanolamine (DEXH). The second variable is DEXCO which is the
amine which has absorbed a carbon dioxide molecule (DEXCO2-). The final variable is DEXH2 which is the protonatedform of the amine (DEXH2+). We will then control via the design specification on the sum of these three amine forms.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
66/93
4-66 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Click on theNew button to add the first variable DEXFL
Click OK
-
8/3/2019 Aspen OLI Standard Getting Started 2006
67/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-67
ClickClose and repeat the steps to add the variable DEXCO
-
8/3/2019 Aspen OLI Standard Getting Started 2006
68/93
4-68 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Finally repeat for the final variable DEXH2
When complete, your define screen should look similar to the following:
-
8/3/2019 Aspen OLI Standard Getting Started 2006
69/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-69
Design-Spec DS-2 define
Click on the Spec tab
-
8/3/2019 Aspen OLI Standard Getting Started 2006
70/93
4-70 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Design-Spec DS-2 spec
Click on the Vary tab.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
71/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-71
Design-Spec DS-2 vary
We are now ready to run the simulation. Execute the process as you would normally.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
72/93
4-72 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
Stream Results1 10 11 12 2
------------
STREAM ID 1 10 11 12 2
FROM : ---- B4 ---- ---- B1
TO : B1 B6 B4 B6 B3
SUBSTREAM: MIXED
PHASE: VAPOR LIQUID LIQUID LIQUID LIQUID
COMPONENTS: KMOL/HR
H2O 0.0 49.9999 4.3425 9.0895-10 49.0708
C3H8 1.0000 0.0 0.0 0.0 1.5427-04
C4H10 0.5000 0.0 0.0 0.0 5.1136-05
CH4 92.0000 0.0 0.0 0.0 2.4377-02
CO2 2.0000 2.7946-06 0.0 0.0 1.5958-03
DEXH 0.0 11.9473 0.0 9.0773-11 6.2977
C2H6 2.0000 0.0 0.0 0.0 4.4794-04
H2S 2.0000 6.3866-06 0.0 0.0 1.1459-02
H2CO3IN 0.0 0.0 0.0 0.0 0.0
OH- 0.0 7.9243-03 7.9559-09 1.3604-13 6.9206-05
DEXCO2- 0.0 1.0001-04 0.0 0.0 1.3863
DEXH2+ 0.0 5.6132-02 0.0 1.3604-13 4.3193HCO3- 0.0 7.7828-03 0.0 0.0 0.3622
H+ 0.0 1.4286-10 7.9559-09 2.1881-23 2.9723-09
HS- 0.0 4.3274-03 0.0 0.0 1.9664
CO3-2 0.0 1.3898-02 0.0 0.0 0.2716
S-2 0.0 4.1008-03 0.0 0.0 3.0553-02
TOTAL FLOW:
KMOL/HR 99.5000 62.0416 4.3425 1.0000-09 63.7431
KG/HR 1765.3995 2164.5732 78.2330 2.5936-08 2315.3019
L/MIN 1973.5478 22.4926 1.3072 3.0066-10 18.8597
STATE VARIABLES:
TEMP C 29.9999 118.3996 24.9999 24.9999 74.4951
PRES ATM 20.1000 20.1000 20.1000 20.1000 20.0500
VFRAC 1.0000 0.0 0.0 0.0 0.0
LFRAC 0.0 1.0000 1.0000 1.0000 1.0000
SFRAC 0.0 0.0 0.0 0.0 0.0ENTHALPY:
CAL/MOL -1.9312+04 -7.2211+04 -6.8304+04 -7.1412+04 -7.5704+04
CAL/GM -1088.4385 -2069.7305 -3791.4240 -2753.4408 -2084.2396
CAL/SEC -5.3376+05 -1.2445+06 -8.2393+04 -1.9837-05 -1.3405+06
ENTROPY:
CAL/MOL-K 39.2889 61.2752 16.7171 23.6537 47.4515
CAL/GM-K 2.2143 1.7562 0.9279 0.9120 1.3064
DENSITY:
MOL/CC 8.4028-04 4.5972-02 5.5367-02 5.5434-02 5.6331-02
GM/CC 1.4909-02 1.6039 0.9974 1.4377 2.0460
AVG MW 17.7427 34.8890 18.0154 25.9355 36.3223
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***PH MISSING 9.9257 6.9928 11.9168 8.6461
-
8/3/2019 Aspen OLI Standard Getting Started 2006
73/93
A Guide to Using The Aspen OLI Interface ASPEN Amine Gas Cleanup Flowsheet 4-73
3 4 6 7 8
---------
STREAM ID 3 4 6 7 8
FROM : B3 B2 B6 B3 B1
TO : B2 B4 B1 ---- ----
SUBSTREAM: MIXED
PHASE: LIQUID LIQUID LIQUID VAPOR VAPOR
COMPONENTS: KMOL/HR
H2O 49.0726 45.6576 50.0180 7.8550-03 0.3249
C3H8 4.7044-06 5.7699-29 0.0 1.4957-04 0.9998
C4H10 1.0977-06 5.7699-29 0.0 5.0039-05 0.4999
CH4 1.1233-03 1.1167-21 0.0 2.3253-02 91.9756
CO2 1.5147-03 3.3900-06 4.8525-10 3.0389-03 1.1187-06
DEXH 6.3045 11.9470 11.9451 2.6327-07 5.5279-05
C2H6 1.8629-05 5.7699-29 0.0 4.2931-04 1.9995
H2S 1.0544-02 7.8195-06 4.0407-08 7.7619-03 1.8738-05
H2CO3IN 0.0 0.0 0.0 0.0 0.0
OH- 6.9071-05 7.6970-03 5.9053-03 0.0 3.3735-33
DEXCO2- 1.3930 6.6224-05 1.6094-02 0.0 7.3477-33
DEXH2+ 4.3058 5.6530-02 4.2299-02 0.0 3.0679-32
HCO3- 0.3558 7.8992-03 1.0638-04 0.0 2.3069-34
H+ 3.0439-09 1.1810-10 2.1864-12 0.0 0.0
HS- 1.9599 3.6159-03 7.8388-03 0.0 6.7600-33
CO3-2 0.2683 1.3815-02 5.5807-03 0.0 5.7317-33
S-2 3.0162-02 4.8109-03 5.9639-04 0.0 7.5195-34
TOTAL FLOW:
KMOL/HR 63.7036 57.6990 62.0415 4.2539-02 95.7999
KG/HR 2314.3667 2086.3401 2164.5635 0.9352 1614.6614
L/MIN 18.9387 21.5914 18.5628 13.4128 2013.2910
STATE VARIABLES:
TEMP C 74.0245 122.2721 29.9999 74.0245 43.5640
PRES ATM 1.5000 1.5000 20.1000 1.5000 20.0000
VFRAC 0.0 0.0 0.0 1.0000 1.0000
LFRAC 1.0000 1.0000 1.0000 0.0 0.0
SFRAC 0.0 0.0 0.0 0.0 0.0
ENTHALPY:CAL/MOL -7.5733+04 -7.2505+04 -7.4676+04 -2.7951+04 -1.8047+04
CAL/GM -2084.5677 -2005.1709 -2140.3922 -1271.2448 -1070.7509
CAL/SEC -1.3401+06 -1.1621+06 -1.2869+06 -330.2704 -4.8025+05
ENTROPY:
CAL/MOL-K 47.3569 73.5384 33.4956 46.6633 0.0
CAL/GM-K 1.3035 2.0337 0.9600 2.1223 0.0
DENSITY:
MOL/CC 5.6061-02 4.4538-02 5.5704-02 5.2858-05 7.9306-04
GM/CC 2.0367 1.6104 1.9434 1.1622-03 1.3367-02
AVG MW 36.3302 36.1589 34.8889 21.9867 16.8545
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***
PH 8.6368 9.9748 11.7076 MISSING MISSING
-
8/3/2019 Aspen OLI Standard Getting Started 2006
74/93
4-74 ASPEN Amine Gas Cleanup Flowsheet A Guide to Using The Aspen OLI Interface
9
-
STREAM ID 9
FROM : B2
TO : ----
SUBSTREAM: MIXED
PHASE: VAPOR
COMPONENTS: KMOL/HR
H2O 4.0102
C3H8 2.7685-06
C4H10 5.4829-07
CH4 7.7149-04
CO2 1.9969
DEXH 3.8551-10
C2H6 1.2360-05
H2S 1.9920
H2CO3IN 0.0
OH- 0.0
DEXCO2- 0.0
DEXH2+ 1.4507-34
HCO3- 5.2421-35
H+ 0.0
HS- 9.2746-35
CO3-2 0.0
S-2 0.0
TOTAL FLOW:
KMOL/HR 8.0000
KG/HR 228.0365
L/MIN 3253.1504
STATE VARIABLES:
TEMP C 86.2422
PRES ATM 1.2000
VFRAC 1.0000
LFRAC 0.0
SFRAC 0.0
ENTHALPY:CAL/MOL -5.3196+04
CAL/GM -1866.2356
CAL/SEC -1.1821+05
ENTROPY:
CAL/MOL-K 0.0
CAL/GM-K 0.0
DENSITY:
MOL/CC 4.0986-05
GM/CC 1.1683-03
AVG MW 28.5045
MIXED SUBSTREAM PROPERTIES:
*** LIQUID PHASE ***
PH MISSING
-
8/3/2019 Aspen OLI Standard Getting Started 2006
75/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-75
Chapter 5EFLASH and EFRACH
OverviewTwo OLI Electrolyte blocks have been added to enable the use of OLIs 4 phase
flash (EFLASH) and OLIs distillation tower (FraChem). These two blocks were
added through ASPEN user added blocks capability and are available via the
Library>Reference feature of Aspen PLUS.
The ability to separate a 4 phase system into 4 streams does not exist in Aspen
PLUS. This operation allows you to make complete phase separation.
EFLASH (Electrolyte Flash)
EFLASH
Four Outlet Material
Streams
FEEDS
HEAT
VAPOR (1)
AQUEOUS (2)
ORGANIC (3)
SOLID (4)
HEAT
.
.
.
Figure 5-1 EFLASH diagram
Three Outlet Material Streams
(1) - VAPOR(2) - AQUEOUS & ORGANIC(3) - SOLID
-
8/3/2019 Aspen OLI Standard Getting Started 2006
76/93
5-76 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
Two Outlet Material Streams
(1) - VAPOR(2) - AQUEOUS & ORGANIC & SOLID
One Outlet Material Stream
(1) - ALL PHASES
Example
In this case we will create a chemistry model as described in early sections. This
model will contain H2O, NaCl, C10H22 and N2. When prompted, select the second
organic liquid phase as well as the aqueous, vapor and solid phases.
Start Aspen PLUS as you would normally and open the BKP file you just created
using either the OLI Chemistry Wizard or OLI Chemistry Generator.
Select theLibrary menu item.
SelectReferences
-
8/3/2019 Aspen OLI Standard Getting Started 2006
77/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-77
If the OLI option has been purchased and the OLI Alliance Suite for Aspen PLUS has been installed
then the OLI option will appear in this dialog. Check the OLI box and then click OK.
The library has not been added to the library tool bar at the bottom of the Aspen PLUS
user interface.
Use the scroll buttons to find the OLI Library (it will be at the end of this list)
The icons for the library appear at the left hand side.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
78/93
5-78 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
The EFLASH and EFRACH (a/k/a FraChem) appear on this library pallete.
Like any other icon, we can drag the icon to the work sheet. Create the following
worksheet:
B1: Eflash4
B2: Flash3
Enter the following composition for STREAM 1
Temperature 25 C
Pressure 1 ATM
H2O 100 kmol/hrC10H22 10 kmol/hr
N2 1 kmol/hr
NaCl 20 kmol/hr
-
8/3/2019 Aspen OLI Standard Getting Started 2006
79/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-79
Double-click the block B1
Add the indicated temperature and pressure in the correct units.
Click on the Stream Definitionstab.
Fill out the four streams.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
80/93
5-80 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
Close the block and open Block B2
Change the default Temperature value toHeat Dutyand set a value of 0.0. Change the
Pressure to 1 ATM. Close the block.
Run the simulation.
We have separated the solid phase into STREAM 4, the vapor into STREAM 2 and amixed stream into STREAM 3. The Mixed Stream is then further separated by phase.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
81/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-81
1 2 3 4 5 6
MIXED VAPOR LIQUID SOLID MISSING LIQUID LIQUID
Substream:MIXED
Mole
Flow
lbmol/hr
H2O 220.4623 0.0530786 220.4092 0 0 7.97E03 220.401
C10H22 22.04623 4.00E03 22.04223 0 0 22.04222 4.80E0
HCL 1.80E12 9.96E13 8.03E13 0 0 0
N2 2.204623 2.162302 0.0423205 0 0 0.0415593 7.61E0
NACL 0 0 0 0 0 0
NAOHW1 0 0 0 0 0 0
NAOH 0 0 0 0 0 0
NACLS 19.66807 0 0 19.66807 0 0
NAOHS 0 0 0 0 0 0
OH 1.39E07 0 1.39E07 0 0 0 1.39E0
H+
1.39E
07
0 1.39E
07 0 0
0 1.39E
0
NA+ 24.42438 0 24.42438 0 0 0 24.4243
CL 24.42438 0 24.42438 0 0 0 24.4243
TotalFlow lbmol/hr 313.23 2.219382 291.3425 19.66807 0 22.09175 269.250
TotalFlow lb/hr 9747.232 62.09899 8535.672 1149.46 0 3137.614 5398.05
TotalFlow cuft/hr 1018.273 869.6067 140.1569 8.509561 0 68.20093 71.9559
TemperatureF 77 77 77 77 77 7
Pressure psia 14.69595 14.69595 14.69595 14.69595 14.69595 14.69595 14.6959
VaporFrac 7.09E03 1 0 0 0
LiquidFrac 0.9301234 0 1 0 1
SolidFrac 0.0627911 0 0 1 0
Enthalpy
Btu/lbmol1.20E+05
2684.868
1.17E+05
1.77E+05
1.29E+05
1.16E+0
Enthalpy Btu/lb 3867.461 95.95564 4008.032 3027.367 908.7212 5809.50
Enthalpy Btu/hr 3.77E+07 5958.748 3.42E+07 3.48E+06 2.85E+06 3.14E+0
Entropy Btu/lbmolR 21.65743 45.90025 21.46558 21.76371 101.8803 14.9037
Entropy Btu/lbR 0.6959674 1.640449 0.7326705 0.3723923 0.7173327 0.743388
Density lbmol/cuft 0.307609 2.55E03 2.078688 2.311291 0.3239216 3.74188
Density lb/cuft 9.572315 0.0714104 60.90083 135.0787 46.00545 75.0188
AverageMW 31.11845 27.9803 29.29772 58.44297 142.0265 20.0484
LiqVol60Fcuft/hr 1.882868 11.88138 0 68.63595
***LIQUIDPHASE***
PH 6.945542 6.945544 6.945
Input Language
-
8/3/2019 Aspen OLI Standard Getting Started 2006
82/93
5-82 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
BLOCK blockid EFLASH
PARAM keyword=value
Optional keywords: TEMP PRES DUTY VFRAC PH MOLEC PHASE
PARAM Default flash is adiabatic at inlet pressure. The user must specify two of the state
variables. The valid combinations are:
TEMP, PRES - Constant TP flash
DUTY, PRES - Adiabatic flash to calculate TEMP
DUTY, TEMP - Adiabatic flash to calculate PRES
VFRAC, PRES - Fixed vapor fraction, calculate TEMP
VFRAC, TEMP - Fixed vapor fraction, calculate PRES
PH, PRES - Fixed pH, calculate TEMP
PH, TEMP - Fixed pH, calculate PRES
TEMP - Temperature
PRES - Pressure, zero or negative indicates pressure drop
VFRAC - Molar vapor fraction
DUTY - Heat duty
PH - pH of the outlet
MOLEC - Default outlet streams are in the true ionic form provided all
species names have been defined in the COMPONENTS
paragraph. If MOLEC is specified in the PARAM sentence,
stream output will be in molecular form (all ions combined to
molecular components)
PHASE - No equilibrium calculation, evaluate enthalpy at T,P and Specified
phase conditions (V,L,S)
PHASE=V - ALL VAPOR PRODUCT
PHASE=L - ALL LIQUID PRODUCT
PHASE=S - ALL SOLID PRODUCT
-
8/3/2019 Aspen OLI Standard Getting Started 2006
83/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-83
EFLASH Examples
_______________________________________________________________________
Example 1 Flash at a temperature=100 and pressure=14.7. Put vapor product
in stream S1, aqueous product in stream S2, organic liquid phase
in stream S3 and solid phase in stream S4..
FLOWSHEET
BLOCK FLSH IN=FEED1 FEED2 OUT=S1 S2 S3 S4
BLOCK FLSH EFLASH
PARAM TEMP=100 PRES=1
_______________________________________________________________________
Example 2 Adiabatic flash to calculate temperature. All phases put in
stream S1.
FLOWSHEET
BLOCK FLSH IN=FEED1 FEED2 OUT=S1
BLOCK FLSH EFLASH
PARAM DUTY=0. PRES=0
. .
Example 3 Flash to a vapor fraction=.2 at the inlet pressure. Put vapor phase
in steam S1, aqueous and organic in stream S2 and solid in S3.
FLOWSHEET
BLOCK FLSH IN=FEED1 FEED2 OUT=S1 S2 S3
BLOCK FLSH EFLASH
PARAM VFRAC=.2 PRES=0.
_______________________________________________________________________
-
8/3/2019 Aspen OLI Standard Getting Started 2006
84/93
5-84 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
EFLASH Examples (Continued)
_______________________________________________________________________
Example 4 All vapor stream at 300 F and 14.7 psia
FLOWSHEET
BLOCK FLSH IN=FEED1 OUT=S1
BLOCK FLSH EFLASH
PARAM TEMP=300 PRES=14.7 PHASE=V
NOTE: There is no equilibrium calculation in this block. The outlet is assumed to be vapor at this condition and the
enthalpy is evaluated at the specified temp and pres.
________________________________________________________________________
-
8/3/2019 Aspen OLI Standard Getting Started 2006
85/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-85
EFRACH (Electrolyte Distillation)
2
3
1
N
DECANTOR
FEEDS
PRODUCTS
VAPOR OR LIQUID
HEAT HEAT
HEATHEAT
HEAT HEAT
Figure 5-2 EFRACH diagram
-
8/3/2019 Aspen OLI Standard Getting Started 2006
86/93
5-86 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
Input Language
BLOCK blockid EFRACH
PARAM keyword=value
keyword: NSTAGEoptional keyword: MAXIT NPRINT NCOLTY NINIF
FEEDS sid stage [phase] /...
PRODUCTS sid stage [phase] keyword=value /...
optional keyword: MOLE-FLOW
P-SPEC stage pres /...
SC-REFLUX keyword=value
keyword: MOLE-D MOLE-LN RR TEMP
HEATERS stage duty /...
STAGE-EFF stage eff /...
DECANTER
T-EST stage temp /...
V-EST stage mole-flow /...
L-EST stage mole-flow /...
VARY varyno vartype keyword=value
varytype: DUTY Q1 QN FEED-FLOW MOLE-LPROD MOLE-VPROD
keyword: STAGE
SPEC specno spectype value keyword=value
spectype: TEMP MOLE-FLOW MASS-FLOW MOLE-FRAC MASS-FRAC
keyword: STAGE PHASE COMPS
PUMP-AROUNDS FROM=stage TO=stage MOLE-FLOW=value
EFRACH (Continued)
_______________________________________________________________________
PARAM NSTAGE is required, all other parameters are optional.
NSTAGE - Number of stages in the column, including condenser
and reboiler; must be greater than 1. and less then 100.
NPRINT - Controls the amount of print to the history file.
1 - print input and final profiles
-
8/3/2019 Aspen OLI Standard Getting Started 2006
87/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-87
2 - same as 1 with intermediate column profiles (default)
3 - same as 2 with full intermediate stage compositions
NCOLTY - Indicates the type of column
0 - electrolyte column with two or three phase (default)
(number of phases is controlled by chemistry model)
2 - electrolyte extraction column
MAXIT - Maximum number of iterations before stopping. (default=30)
NINIF - Tower initialization flag
0 - Use previous results except for first time (default)
1 - Re-initialize tower each time in recycle loops
2 - Use previous results all the time
_______________________________________________________________________
FEEDS Used to enter inlet material and heat stream locations. Liquid
feeds are introduced onto the specified stage, vapor feeds go to
the stage above the specified stage. A mixed phase feed will
have the liquid portion to the specified stage and the vaporportion to the stage above. A vapor stream to the bottom stage
is specified with as STAGE= (NSTAGE+1). A maximum of ten feed
streams can be specified. (Heat streams must be specified last)
sid - Stream ID
stage - Stage number from the top
phase - option entry to specify phase condition of feed.
(default is to calculate based on temp and pres)
-
8/3/2019 Aspen OLI Standard Getting Started 2006
88/93
5-88 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
EFRACH (Continued)
_______________________________________________________________________
PRODUCTS Two product streams are required, a distillate and a bottoms.
In addition, vapor side draws and liquid side draws may be
specified for a maximum of ten product streams. (Heat streams
must be specified last)
sid - Stream ID
stage - Stage number from the top
phase - Indicates phase condition of product stream (V or L).
phase=L .... all liquid product
phase=V .... all vapor product
MOLE-FLOW - Mole flow rate of product stream, required for all
side stream draw-offs. The distillate and bottoms
rate should not be specified.
P-SPEC Used to set the column pressure profile. At least on pressure
is required. Only the top two stages and the bottom stage are
used. The remaining stage are calculated by interpolation.
stage - Stage number from the top
pres - Pressure
SC-REFLUX Used to specify a subcooled condenser, both the distillate and
reflux are subcooled. The default is a partial condenser with
a vapor distillate and liquid reflux. One of the following is
required (MOLE-D, MOLE-LN,or RR). The temperature is calculated
from the specified heat duty or it may also be specified.
TEMP - Condenser temperature
MOLE-D - Distillate rate out top of column
MOLE-LN - Reflux rate from condenser to top stage of the column
RR - Reflux ratio (Distillate rate/Reflux rate)
EFRACH (Continued)
_______________________________________________________________________
HEATERS May be used to enter the heater stage location and duty. Inlet
heat streams may be used in place of heater duty. Any inlet
heat streams will be added to the duty. A HEATER record is required
if the column has a condenser or reboiler.
stage - Stage number from the top
-
8/3/2019 Aspen OLI Standard Getting Started 2006
89/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-89
duty - Heat duty
_______________________________________________________________________
STAGE-EFF May be used to enter Murphree stage efficiencies. These efficiencies
are applied to each component on the stage. Any missing stages will
be linear interpolated; therefore, the top and bottom stages must
be supplied.
stage - Stage number from the top
eff - Efficiency (default=1.0)
_______________________________________________________________________
DECANTER A decanter may be specified for the condenser. The organic phase
is drawn off as distillate and the aqueous phase is refluxed back
to the column. When using this option, a temperature spec needs
to be entered to set the temperature of the condenser - varying
the condenser heat duty to achieve the temperature. A totalcondenser is assumed.
_______________________________________________________________________
T-EST Temperature estimates must be entered for the top two stages and
the bottom stage (At least one temperature estimate is required).
stage - Stage number from the top
temp - Estimated stage temperature
-
8/3/2019 Aspen OLI Standard Getting Started 2006
90/93
5-90 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
EFRACH (Continued)
_______________________________________________________________________
V-EST A vapor flow rate estimate is required for the distillate rate
stage - Stage number from the top
mole-flow - Estimated vapor rate from the stage
L-EST A liquid flow rate estimate may be entered for the reflux rate
stage - Stage number from the top
mole-flow - Estimated liquid rate from the stage
-
8/3/2019 Aspen OLI Standard Getting Started 2006
91/93
A Guide to Using The Aspen OLI Interface EFLASH and EFRACH 5-91
EFRACH (Continued)
_______________________________________________________________________
VARY Vary may be used in conjunction with the SPEC record to achieve
some design specification. By default, all exchanger duties, feed
rates, and side draw rates are fixed at the user specified values.
varyno - Manipulated variable number
vartype - Manipulated variable type
DUTY - External heat duty on a stage (requires STAGE)
Q1 - Condenser duty
QN - Reboiler duty
FEED-FLOW - Feed rate to the column (requires STAGE)
MOLE-LPROD - Flow rate of a liquid product (req STAGE)
MOLE-VPROD - Flow rate of a vapor product (req STAGE)
STAGE - Stage number of duty, feed-flow, or product stream
_______________________________________________________________________
SPEC May be used to enter design specification. One SPEC sentence is
required for each VARY sentence.
specno - Spec number
TEMP - Temperature on a given stage (Req STAGE)
MOLE-FLOW - Total flow rate or flow rate of a group of components
MASS-FLOW from a stage (Req STAGE and PHASE, COMPS requied for a
group of components)
MOLE-FRAC - Composition of a group of components from a stage
MASS-FRAC (Req STAGE, PHASE, and COMPS) only molecular speciesmay be selected.
STAGE - Stage number from top for spec
PHASE - Phase for spec V - for vapor, L - for liquid
COMPS - List of molecular component IDs
value - Desired value for the design specification
________________________________________________________________________
EFRACH (Continued)_______________________________________________________________________
PUMP-AROUNDS May be used to specify liquid pump-arounds in the column.
Pump-arounds must be from a lower stage to a higher stage
in the column. Multiple pump-arounds can not cross one another.
FROM - Specifies the stage to pump from.
TO - Specifies the stage to pump to.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
92/93
5-92 EFLASH and EFRACH A Guide to Using The Aspen OLI Interface
stage - Stage number from top
MOLE-FLOW - Molar flow rate of the pump-around.
-
8/3/2019 Aspen OLI Standard Getting Started 2006
93/93
EFRACH Example
_______________________________________________________________________
Example 1 A 35 stage steam stripper with condenser. Steam feed to the bottom stage and an organic stream to stage 26.
Set stage efficiency to .5 on all stages except condenser. Spec the methanol in the bottoms product to 1
ppm by varying the steam feed flow rate.
FLOWSHEET
BLOCK STRIP IN=S1 S2 OUT=S3 S4
BLOCK STRIP EFRACH
PARAM NSTAGE=35
FEEDS S1 36 / S2 26
PRODUCTS S3 1 V / S4 35
P-SPEC 1 14.7 / 35 14.7
HEATERS 1 1.0E+06
T-EST 1 209 / 2 212 / 35 215
V-EST 1 50
STAGE-EFF 1 1 / 2 .5 / 35 .5
VARY 1 FEED-FLOW STAGE=35
SPEC 1 MASS-FRAC 1.0E-06 STAGE=35 PHASE=L COMPS=METHANOL
Example 2 A 10 stage distillation column with condenser and reboiler. Feed to stage 5. Condenser is sub-cooled to 100
F and has a reflux ratio=2 (reflux rate/distillate rate). Column has
a 100 mole/hr pump-around from stage 8 to stage 2. A liquid side-draw is taken from stage 3. Both
condenser and reboiler have outlet heat streams
DEF-STREAMS HEAT Q1 QN
FLOWSHEET
BLOCK DIST IN=S1 OUT=S2 S3 S4 Q1 Q2
BLOCK DIST EFRACHPARAM NSTAGE=10
FEEDS S1 5
PRODUCTS S2 1 / S3 10 / S4 3 L MOLE-FLOW=100 / Q1 1 / QN 10
P-SPEC 1 14.7 / 2 16 /10 20
HEATERS 1 -1.0E+06/ 10 2.0E+06
SC-REFLUX TEMP=100 RR=2 Note: Q1 CALC TO GIVE 100 F COND TEMP
T-EST 1 100 / 2 212 / 10 220
V-EST 1 50 Note: ESTIMATE OF DISTILLATE RATE
PUMP-AROUND FROM=8 TO=2 MOLE-FLOW=100