aspen塔模拟教程Word下载.docx

1、DIST BOTTOMS This example will show how to use Radfrac on Aspen Plus to model distillation columns. The feed shown in the diagram above will consist of 50 lbmol/hr of Methanol and 50 lbmol/hr of water. A purity of 99.5% is desired in both the bottoms and distillate product streams using a reflux rat

2、io of 1.5.If you dont know how to log on to Aspen Plus, please see the “Getting Started on Aspen Plus” manual.Choose the Template OptionClick “OK.”This window allows you to select a particular simulation option. For this example, select the “General with EnglishUnits” option. Also, makesure that the

3、 option in the Run Type box displays “Flowsheet”Click “OK”Each time Aspen Plus is opened and a new file is created or an existing file is opened this login window appears.Enter Unix host for the server type, sylvan.che.sdsmt.edu for the node name, and your correct User name and Password.Another wind

4、ow will appear indicating the connection was established.Aspen Plus automatically assigns labels to every stream and block. To turn this option off, click on the Tools menu in the toolbar and select Options.In the Options window, click on the folder tab labeled “Flowsheet”. Next, click on these boxe

5、s under the Stream and Block labels. The check marks in the boxes should disappear indicating that these options are disabled.Click OK when through.To start the simulation, click on the Columns tab found in the selection of pieces of equipment. Go to the down arrow to the right of the RadFrac select

6、ion. Click on Fract1, the second picture from the left in the top row. Next, move the cursorinto the white area and click on the desired position for the column. A prompt should appearasking to input the blockID, for this example “Dist”was chosen.The Feed, Distill and Bottoms streams need to be crea

7、ted.To create the streams, first click on the “MaterialStreams” box at thebottom left corner of the window. Red and blue arrows appear around the column.A red arrow signifiesa stream that is required for a design specification; blue arrows signify an optional stream.Click on the red arrow on the lef

8、t side of the column to add your feed stream. For this simulation thereis only one feed stream, if there were more feed streams use the blue arrow on the left of the column to add more streams.Enter “Feed” in the ID box when prompted for this simulation.We next need to add the product streams. Only

9、one of the red arrows needs to be chosen at the top of the column. Chose the bottom of the two red arrows at the top of the column. This column will have a total condenser and therefore liquid distillate. Labelthe top product stream“Distill”.Next add the bottom product stream using the red arrow. La

10、bel the product “Bottoms”.All the necessary streams have been added and numerical data can now be entered.Now we are ready to begin entering the necessary numerical data.Click on the “Next” button to begin entering the data. This button is blue and is located in the tool bar at the top of the window

11、.Click “OK”.If this box doesnt appear it is because your flowsheet isnt complete. A box will then appear telling you what part of the flowsheet you are missing.This box should appear and a title for this simulation can now be entered although is not mandatory for this simulation. Click on the Next b

12、utton to continue entering numerical data.If this box doesnt appear you can go to Setup on the left-hand side of the box and click on that.The Components box will be the next to appear. This allows us to enter all of the components that will be present within our system; in this simulation they will

13、 be Methanol and Water.Type “Methanol” under the column “Component ID” and press the Enter key.AspenPlus will now search itsdatabase and attempt to match a chemical namewith the Component ID that was entered. Ifthis happens the other three boxes （Type, Component Name, and Formula） will fill automati

14、cally and other components can then be entered.Enter “Water” in the second row under “Component ID” and hit Enter tofill the other threeboxes. We now have entered all the components necessary for this simulation. Hitthe “Next” buttonto proceed.The next screen to appear is the Property Specifications

15、 sheet. This allows us to choose the base method that we want to use for the calculations AspenPlus will perform. We will select NRTL for this simulation.Click “Next.”The next screen to appear will show the interaction parameters for the components in our system using the base method we selected. If you are happy with this numbers （and we sure hope you are） click “Next.”A prompt screen will appear asking if we want to enter any more data or change the property specifications.Since every