Open up a blank flowsheet by going to Start and Programs and then clicking sequentially on Aspen Tech, Aspen Engineering Suite, Aspen Plus 12.1, and Aspen Plus User Interface. The window shown in Figure 3.1 opens up. Selecting the Blank Simulation button and clicking OK opens up the blank flowsheet shown in Figure 3.2. The page tabs along the bottom let us choose which unit operations to place on the flowsheet. We are going to need a distillation column, two pumps, and three control valves.
Clicking the Columns page tab and clicking the arrow just to the right of RadFrac opens the window shown in Figure 3.3, which contains several types of columns, including full columns, strippers (with a reboiler but no condenser), rectifiers (with a condenser but no reboiler), and absorbers (with neither). Click the full-column button on the top row, second from the left, and move the cursor to the blank flowsheet. The cursor becomes a cross. If we click on the flowsheet, a column icon appears, as shown in Figure 3.4.
Distillation Design and Control Using Aspen™ Simulation, By William L. Luyben Copyright © 2006 John Wiley & Sons, Inc.
To add the pumps and control valves to the flowsheet, click the page tab on the bottom of the window labeled Pressure Changers. This opens the window shown in Figure 3.5a, on which we can select the Pump button or the Valve button. Clicking the arrow just to the right of the Valve button lets us select a valve icon (Fig. 3.5b). Move the cursor to the flowsheet and paste a valve to the left of the column (Fig. 3.5c). The cursor remains a cross on the flowsheet, and we can paste as many additional valves as needed. Two more are inserted to the right of the column in Figure 3.5d. In a similar way, we click the Pump button, select an icon, and paste two pumps on the flowsheet as shown in Figure 3.6.
| 1 Process Flowsheet Window
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