View source for DWSIM/C3/Chemsep-Distillation-Column/English

{|border=1
||'''Visual Cue'''
||'''Narration'''
|- 
|| '''Slide Number 1'''

'''Title Slide'''
|| Welcome to this tutorial on simulating a '''Chemsep Distillation Column''' in '''DWSIM.'''

|-
|| '''Slide Number 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn to

* Specify properties of a '''Chemsep '''column and
* Simulate a '''Distillation''' column
|-
|| '''Slide Number 3'''

'''System Requirements'''
|| To record this tutorial, I am using 

* '''DWSIM 5. 8 (Classic UI) Update 3''' and 
* '''Windows 10''' '''OS'''

But, this process is identical in '''Linux, Mac OS X '''or '''FOSSEE OS on ARM'''.
|-
|| '''Slide Number 4'''

'''Prerequisites'''
|| To practice this tutorial, you should know to-

* Add components to a '''flowsheet'''
* Select '''thermodynamic packages'''
* Add '''material''' and '''energy streams''' and specify their properties. 
|-
|| '''Slide Number 5'''

'''Prerequisite Tutorials and Files'''

'''https:\\spoken-tutorial.org'''
|| The prerequisite tutorials are available on this website.

You can access these tutorials and all the associated files from this site.

|-
|| '''Slide Number 6'''

'''Code Files''' 
|| '''DWSIM-Chemsep''' file used in the tutorial is provided as a '''Code file''' on this tutorial page. 

Download the file from '''Code Files''' link. 
|-
|| '''Slide Number 7'''

'''Components:''' Furfural & Ethyl Acetate

'''Thermodynamics''': UNIFAC

'''Inlet Stream:'''

Mole Fraction(C<sub>5</sub>H<sub>4</sub>O<sub>2</sub>): 0.879

Mole Fraction(C<sub>4</sub>H<sub>8</sub>O<sub>2</sub>): 0.121

Temperature: 397 K

Pressure: 101325 Pa

Molar Flow: 616.177 mol/s
|| We will develop a '''flowsheet''' to determine '''Outlet stream''' properties after '''Distillation'''.



Here we give '''Compounds''', '''Thermodynamics '''and I'''nlet stream conditions'''.
|-
|| '''Slide Number 8'''

'''Citation'''

An, Y., Li, W., Li, Y., Huang, S., Ma, J., Shen, C., & Xu, C. (2015)

Design/optimization of energy-saving extractive distillation process by combining preconcentration column and extractive distillation column

''Chemical Engineering Science'', ''135'', 166-178

|| I have taken this problem statement from a paper published in '''Chemical Engineering Science'''.



For reference, I am citing the paper here.

|-
|| 
|| I have already opened '''DWSIM''' on my machine. 

|-
|| '''File''' >> '''Open File''' 
|| Go to '''File''' menu and click on '''Open File'''. 

|-
|| Point to the file on the '''Desktop'''. 


Select the file from the '''Desktop'''. 

| | I have already downloaded and extracted the file on my '''Desktop'''. 

Select the file from the '''Desktop'''. 

|-
|| Click on '''Maximize''' button. 
|| Let us maximize the '''simulation''' window. 

|-
|| Point to material and energy streams
|| This file contains all '''material''' and '''energy streams''' necessary for this tutorial.

|-
| | 
| | Now let us insert a '''Distillation Column '''into the '''flowsheet'''. 

|-
|| Click and drag '''Shortcut column''' to the flowsheet
|| At the bottom of the main '''simulation''' window, go to '''CAPE-OPEN '''tab.

|-
|| Click and drag '''CAPE-OPEN Unit Operation '''to the flowsheet 
|| Click on the '''CAPE-OPEN Unit Operation '''displayed. 

Drag and drop it to the '''flowsheet.''' 

|-
| | Point to '''Add CAPE-OPEN Unit Operation''' 
| | '''Add CAPE-OPEN Unit Operation''' window opens. 

|-
| | Select '''ChemSep''' 

Click '''Ok''' 
| | Select '''ChemSep''' from the displayed list of '''Unit Operations.''' 

This list may vary depending on '''CAPE-OPEN Unit Operations''' that have been installed in your system.

At the bottom, click on the '''Ok '''button'''.''' 

|-
| | 
|| Let us now arrange it as required.

|-
|| Click on the added '''CAPE-OPEN Unit Operation''' 
| | Click on the added '''CAPE-OPEN Unit Operation (COUO-005)''' 

|-
|| Type '''Distillation Column''' 
| | We will change the name of the object to '''Distillation Column.''' 

|-
| | 
| | First, we will connect the '''inlet feed streams'''.

|-
| | Go to '''Connections''' 

Click on drop down arrow against '''feed'''

Select '''Feed'''
|| Click on the''' Distillation Column'''.

Go to the left side of the window.

Under '''Connections''', go to the '''Inlet''' section.

Click on the drop-down against '''feed''' and select '''Feed'''.

|-
|| Click on '''Open CAPE-OPEN Object Editor''' button
|| Click on '''Open CAPE-OPEN Object Editor''' button in the '''Object Property Editor''' window. 

|-
|| Cursor to '''New Unit Operation'''
|| '''New Unit Operation''' pop-up window appears. 

|-
| | '''Unit Name >> Distillation Column.''' 
|| Click on the field against '''Unit Name '''and type '''Distillation Column.''' 

|-
|| Click on '''OK''' button.
|| We will specify the rest of the details in a while.

Click on the '''OK''' button at the bottom.

|-
|| Point to '''ChemSep (CAPE-OPEN) - Distillation Column''' 
|| The '''ChemSep (CAPE-OPEN) -Distillation Column''' window will appear. 

|-
|| Click on '''CAPE-OPEN'''
|| Click on '''CAPE-OPEN''' on the left side of the '''ChemSep''' window. 

|-
|| Point to '''Distillation Column '''section
| | Under '''Distillation Column '''section, there is a checkbox against '''CAPE-OPEN Properties'''. 

This checkbox is checked by default.

|-
| | Cursor to '''CAPE-OPEN Properties'''
| | This checkbox is to indicate if the column is to be '''simulated''' with

* the '''CAPE-OPEN thermodynamics'''
* or the native '''thermodynamics''' available with the column.

We will use the native '''thermodynamics''' available with the column.

|-
|| Uncheck the checkbox against '''CAPE-OPEN Properties'''.
| | So we will uncheck the checkbox against '''CAPE-OPEN Properties'''.

|-
|| '''Distillation Column''' >> '''Expose energy port'''
| | Next, we have '''Expose energy ports'''. 

This is to indicate if the '''energy connection ports''' are to be exposed to connect them to '''energy stream'''.

This is needed if the '''energy streams''' are to be connected and used later for '''energy recycling'''. 

Else it can be unchecked.

|-
| | Check the '''Expose energy port''' check-box
| | For demonstration purposes, let us see how to connect the '''energy streams'''. 

Therefore, check the '''Expose energy ports''' check-box.

|-
|| Click on '''Save problem to file''' button
| | Click on '''Save problem to file''' button on the toolbar.

|-
| | Click the cross button
|| Close the '''ChemSep''' window by clicking the cross button at the top right corner of the window. 

|-
| | Click '''Yes'''
|| A pop-up appears, in which we will click '''Yes.'''

|-
| | 
| | Now we will connect the '''outlet material streams''' with the column.

|-
|| Click on '''Distillation Column''' >> left side >> Under '''Connections'''  >> '''Outlet'''
| | Click on the''' Distillation Column'''.

Go to the left side of the window.

Under '''Connections''', go to '''Outlet''' section.

|-
|| Go to '''Connections''' 

Click on the drop down against '''TopProduct''' 

Select '''Distillate'''
||Then click on the drop-down against '''TopProduct''' and select''' Distillate'''.

|-
|| Click on the drop down against '''BottomProduct''' >>Select '''Bottoms''' 
| | Click on the drop-down against '''BottomProduct '''and select''' Bottoms'''.

|-
| | 
| | Now we will connect the '''energy streams''' with the column.

|-
| | Go to '''Energy '''section 

Click on the drop down against '''Reboiler heat duty'''

Select '''R-Duty'''
| | Go to the '''Energy''' section.

Then click on the drop-down against '''Reboiler heat duty'''.

Select '''R-Duty.'''

|-
| | Click on the drop down against '''Condenser heat duty'''

Select '''C-Duty'''
|| Now click on the drop-down against '''Condenser heat duty.''' 

Select '''C-Duty.''' 

|-
|| 
|| Now we will edit the properties of the '''Column'''. 

|-
|| Click on '''Open CAPE-OPEN Object Editor.''' 
| | Click on '''Open CAPE-OPEN Object Editor''' button.

|-
| | Point to the window. 
| | The '''ChemSep''' window opens. 

|-
| | Click on '''Components''' 
| | Click on '''Components''' on the left side of the '''ChemSep''' window.

|-
| | Point to the feed streams
|| We have already connected the '''feed streams''' to the column.

So the components are already listed here.

|-
| | Click on '''Operation'''
| | Click on '''Operation''' on the left side of the '''ChemSep''' window.

|-
|| '''Select Type of Simulation''' >> '''Equilibrium column'''
| | Under '''Select Type of Simulation''' section, '''Equilibrium column''' is selected by default.

We are '''simulating''' a '''distillation''' column which is an '''equilibrium''' operation.

So we will leave it as it is.

|-
| | '''Configuration >> Operation''' >> '''Simple Distillation'''
| | Now we will move to '''Configuration''' section.

Under '''Configuration,''' select '''Operation''' as '''Simple Distillation''', if not already selected.

By default, '''Simple Distillation''' is already selected as '''Operation'''.

|-
| | '''Condenser''' >>'''Total (Liquid Product)'''
| | Select '''Condenser''' as '''Total (Liquid Product)''', if not already selected.

By default, '''Total (Liquid Product)''' is already selected as '''Condenser'''.

|-
| | '''Reboiler''' >> '''Partial (Liquid Product)'''
| | Select '''Reboiler''' as '''Partial (Liquid Product)''', if not already selected.

By default, '''Partial (Liquid Product)''' is already selected as '''Reboiler'''.

|-
|| '''Number of stages '''>> '''25''' 
|| Next we will enter the '''Number of stages''' and '''Feed stage'''.

Type the '''Number of stages''' as '''25''' and press '''Enter'''.

A pop-up appears, in which we will click '''Yes.'''

|-
| | '''Feed stage >> 11'''
| | Type the '''Feed stage''' as '''11 '''and press '''Enter.'''

|-
| | Click on '''Properties''' 
| | Click on '''Properties''' on the left side of the '''ChemSep''' window. 

|-
| | 
| | Here we will define the '''Thermodynamics''', '''Physical Properties''' and '''Reactions''' taking place in the '''column'''. 

|-
| | 
| | First, we will define the '''Thermodynamics.''' 

|-
| | '''K-value >> DECHEMA'''
| | Click on the drop-down against '''K-value'''.

Select '''DECHEMA'''.

|-
| | '''Activity coefficient >> UNIFAC'''
| | Next, click on the drop-down against '''Activity coefficient''' and select '''UNIFAC'''.

|-
| | '''Vapour pressure >> Antoine'''

| | Next, click on the drop-down against '''Vapour pressure''' and select '''Antoine'''.

|-
| | '''Enthalpy >> Ideal'''
|| Next, click on the drop-down against '''Enthalpy''' and select '''Ideal'''.

|-
|| 
| | There are no '''Physical Properties''' or '''Reactions''' to be defined.

So, we will not specify them.

|-
| | Click on '''Feeds'''
| | Now click on '''Feeds.'''

The '''feed stream''' is already connected to the column.

So the '''feed stream '''properties are already displayed here.

We will not change anything.

|-
| | Click on '''Pressures'''
| | Now we will see how to define '''Pressure Profiles''' in '''Chemsep''' Column.

Click on '''Pressures''' on the left side of the '''ChemSep''' window. 

|-
| | '''Column pressure '''>>''' Constant pressure'''


'''Condenser Pressure '''>>''' 101325 N/m<sup>2'''</sup>
| | Click on drop-down against '''Column pressure'''.

Select the '''pressure profile''' to specify for the column depending on '''pressure data''' available.

By-default, '''Constant pressure''' is selected.

We will not change that as the column is operated at constant pressure.

Enter '''Condenser Pressure '''as '''101325 N/m<sup>2</sup> '''

|-
| | '''Top Pressure '''>>''' 101325 N/m<sup>2'''</sup>
| | Enter '''Top Pressure '''as '''101325 N/m<sup>2'''</sup>

|-
| | Click on '''Column Specs'''
| | Next click on '''Column Specs''' on the left side of the '''Chemsep''' window.

|-
| | Point to '''Column Product Specification '''

'''Top''' '''specification '''>> '''Reflux ratio'''
|| Go to '''Column Product Specifications''' section.

Select the '''Top''' '''specification '''as '''Reflux ratio''', if not already selected.

By default, '''Reflux Ratio''' is already selected as '''Specification.'''

|-
| | '''Reflux Ratio''' >> '''1.018'''
|| Beside that we can see a value field.

Here we will enter '''Reflux Ratio''' as '''1.018''' and press '''Enter'''.

|-
| | '''Bottom specification '''>> '''mole fraction of a component'''

Enter the value as '''0.01'''
| | Now select the '''Bottom specification '''as '''mole fraction of a component''',

Enter the value as '''0.01''' and press '''Enter'''.

|-
|| Choose '''Ethyl acetate'''
|| Below that, from the drop-down select''' Ethyl acetate'''.

|-
| | Click on '''Save problem to file''' button
| | Click on '''Save problem to file''' button on the toolbar.

|-
|| Close the '''ChemSep''' window
| | Close the '''ChemSep''' window. 

|-
| | 
| | Now we will run the '''simulation'''. 

|-
| | Click '''Solve Flowsheet'''
|| To do this, click on '''Solve Flowsheet''' button on the toolbar.

|-
| | Click on the '''Distillate'''

'''Ethyl Acetate''' composition: '''0.99'''
|| When the calculations are completed, click on '''Distillate''' in the '''flowsheet'''.

From the '''Property Editor window''', go to '''Input Data''' tab.

Under '''Compounds Amounts''' tab, we can see that the '''Ethyl Acetate''' composition is '''0.999'''. 

|-
|| Click '''File '''and '''Save As'''
|| Let me save this '''simulation''' with the name '''Chemsep-Distillation.''' 

|-
|| 
|| Let's summarize.

|-
|| '''Slide Number 9'''


'''Summary'''
|| In this tutorial, we have learnt to:

* Specify properties of a '''Chemsep''' column and 
* Simulate a '''Distillation''' column

|-
| | '''Slide Number 10'''

'''Components:''' Benzene & Toluene

'''Thermodynamics''': Raoult’s Law

'''Inlet Stream:'''

Mole Fraction(C6H6): 0.6

Mole Fraction(C7H8): 0.4

Temperature: 397 K

Pressure: 101325 Pa

Molar Flow: 100 kmol/h
|| As an assignment, repeat this '''simulation''' with different '''compounds.'''



Different '''feed conditions'''

|-
|| '''Slide Number 11'''

'''Column Configuration:'''

'''No of Stages: '''20

'''Feed Stage: '''10

'''Reflux Ratio:''' 2.3

'''Mole Fraction of Benzene in Bottoms: '''0.01
|| Different '''Column Configuration'''

|-
|| '''Slide Number 12'''


'''About the Spoken Tutorial Project''' 

|| Watch the video available at the following link. 

[http://spoken-tutorial.org/ http://spoken-tutorial.org/] 

It summarizes the Spoken Tutorial project. 

|-
| | '''Slide Number 13'''

'''Spoken Tutorial Workshops''' 

|| The Spoken Tutorial Project Team 

* Conducts workshops and 
* Gives certificates. 
* For more details, please write to us. 
|-
|| '''Slide Number 14'''

'''Forum Slide''' 

Do you have questions in this '''Spoken Tutorial?''' 

Please visit this site 

Choose the minute and second where you have the question. 

Explain your question briefly. 

Someone from the FOSSEE team will answer them. 
|| Please post your timed queries in this forum.

|-
|| '''Slide Number 15'''

'''DWSIM Flowsheeting Project''' 

|| The '''FOSSEE''' team coordinates conversion of existing flow sheets into '''DWSIM'''. 

We give honorarium and certificates for those who do this. 

For more details, please visit this site. 

|-
|| '''Slide Number 16'''

'''Lab Migration Project''' 
|| The FOSSEE team helps migrate commercial simulator labs to DWSIM. 

We give honorarium and certificates for those who do this. 

For more details, please visit this site 

|-
|| '''Slide Number 17'''

'''Acknowledgements'''
|| '''Spoken Tutorial''' and '''FOSSEE''' projects are funded by '''NMEICT, MHRD''', Government of India. 

|-
|| '''Slide Number 18'''

'''Thanks'''
|| This tutorial is contributed by Kaushik Datta and Priyam Nayak. 

Thanks for joining.

|}