DWSIM-3.4/C2/Shortcut-Distillation/English

Visual Cue	Narration
Slide 1 Opening Slide	Welcome to the spoken tutorial on Simulating a Shortcut distillation column in DWSIM. I am Kannan Moudgalya
Slide 2 Learning Objectives	In this tutorial, we will simulate a Shortcut distillation column. We will learn to calculate Minimum number of stages Minimum reflux ratio Feed stage location Condenser and reboiler duty To achieve a particular product specification
Slide 3 System Requirements	To record this tutorial, I am using DWSIM 3.4
Slide 4 Prerequisites	To practice this tutorial you should know How to add components to a flowsheet How to select thermodynamic packages How to add material streams and specify their properties The prerequisite tutorials are mentioned on our website, spoken hyphen tutorial dot org.
Slide 5 and 6	In the next two slides, we give specifications for the distillation problem. This problem statement is given by Prof. Bill Luyben of Lehigh University.
	I have already opened DWSIM.
Click System of Units menu and select Custom 1.	Click on System of Units menu. Select Custom 1. This allows us to customise units, which we will do next.
Click Configure Simulation	Let us click on Configure Simulation button.
Add Benzene and Toluene	Add Benzene from the ChemSep Database Next Toluene
Click Thermodynamics and Property Packages	We will next click Thermodynamics and then Property Packages. Scroll down and select Raoult’s Law.
Click Options	Below the Thermodynamics option, you see Options menu. Click this.
Click Units System	Click Units System. Let me bring this inside.
Click Pressure and choose atm	Pressure menu appears at the top of this list. Click and choose atm for atmosphere.
Click Molar flow rate and select kmol/h	Below the Pressure menu is the Molar flow rate menu. Click it and select kmol/h.
Click Back to simulation	Click on Back to simulation.
Click and drag Material Stream to the flowsheet	Let us insert a feed stream that has to be distilled.
Type 0.4 for benzene and 0.6 for toluene.	Enter 0.4 for benzene and 0.6 for toluene.
Click Apply and Close	Apply and Close.
Click Appearance and type Feed	We will change the name of this stream to Feed.
Click Properties	Click on Properties. Scroll to the top.
Click Specification and click down arrow	Click on Specification.
Click Pressure and Vapor Fraction	Choose Pressure and Vapor Fraction.
Click Molar flow rate	Locate the Molar flow rate option. It has the units of kmol/h.
Click on field and type 100	Click on this field. Enter 100.
Click Molar Fraction (Vapor Phase)	Locate Molar Fraction (Vapor Phase). The default value is 0. This indicates saturated liquid. Let us leave it as it is.
Click and drag Shortcut column to the flowsheet	Let us insert a Shortcut column to the flowsheet. Locate it from the Object palette. The Shortcut Column is based on Fenske-Underwood-Gilliland method. Click on it and drag it to the flowsheet. Let us arrange it.
Click and drag Material Stream to the flowsheet	Now let us insert two output streams. One will be distillate and the other is Bottoms. To do that let us drag two material streams. As they are output streams. We will leave them unspecified.
Click on stream, appearance and type Distillate and Bottoms	We will change the name of these streams to Distillate and Bottoms.
Click and drag Energy Stream to the flowsheet	Let us now insert two Energy streams. For Condenser duty and Reboiler duty.
Click on stream, appearance and type C-Duty and R-Duty	Name these streams as C-Duty and R-Duty.
Click Shortcut distillation column	We are now ready to specify the Shortcut distillation column. Click on it and select it.
Hover mouse at Selected Object window, Properties, Connections	Go to the Selected Object window. Under Properties tab, locate Connections menu.
Click Feed and click down arrow	The first option is Feed. Let me click on Feed menu. A down arrow appears, indicating a menu. Click this arrow. Here we choose Feed.
Click Distillate and click down arrow	Now click on the next option which says Distillate. Click on the drop down arrow and select Distillate.
Click Bottoms and click down arrow	Similarly for bottoms choose Bottoms
Click Condenser Duty and click down arrow	The next option is Condenser Duty. Let me click on it and select C-Duty.
Click Reboiler Duty and click down arrow	Similarly choose R-Duty for Reboiler. This completes the connectivity of the flowsheet.
Hover mouse at Properties, Parameters, Condenser type	Under Properties tab, locate Parameters section. This section is used to specify various attributes of a Shortcut Column. In this section, the first option is Condenser. By default, it is total condenser. If a partial condenser is required, you can change it here. Here we leave it as it is.
Click Reflux ratio	Let us enter the reflux ratio. Click on it.
Type 2	Here we enter the value 2 in the field next to it.
Click Light Key and click down arrow	We will specify the Product composition. Let us first specify light key details in bottoms. To do this, let me click light key. Click the arrow and choose Benzene.
Type 0.05	In the given field on the next row, enter 0.05.
Click Heavy Key and click down arrow	Similarly for the heavy key, choose Toluene.
Type 0.05	Now we specify the heavy key in Distillate. We enter 0.05.
Click Condenser Pressure	Next in the list is the Condenser Pressure. The default value is 0 atmosphere.
Type 1	We will change it to 1 atmosphere.
Click Reboiler Pressure and type 1	Similarly we will change reboiler pressure to 1 atmosphere
	Now we will run the simulation.
Click play	To do this, go to the calculator options. Click on the Play button.
Click Recalculate	Now click on the Recalculate button.
click Shortcut column	When the calculations are completed, click on the Shortcut column.
Hover mouse at Properties, Results	Under Properties tab, locate Results menu. This shows all the required results like Minimum Reflux Ratio Minimum Number of Stages Actual Number of Stages Optimal Feed Stage, etc.
Results slide	I have tabulated these results in a slide.
Click File and Save As	Let me save this simulation. I have saved this as shortcut end.
	Let me summarise.
Summary slide	We learnt how to specify a shortcut distillation column. To specify key components, purities, and minimum reflux ratio. To use custom units. To calculate minimum reflux ratio optimal feed location and total number of trays
	Let me give some assignments.
Assignment 1 slide	The assignment in this slide has to do with mass balances. I use blue colour to indicate streams and equipment.
Assignment 2 slide	Let us go to the next Assignment. Carry out energy balance as mentioned.
Assignment 3 slide	Repeat the simulation with different product purities. Determine how the energy requirement changes.
Assignment 4 slide	Repeat this simulation with different thermodynamics. Repeat this simulation with different feed conditions. Try to reason your results.
	We have come to the end of this tutorial
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Thanks	Thanks for joining. Good bye.

Contributors and Content Editors

Nancyvarkey, PoojaMoolya, Pratik kamble