Versus Phenol Flow

Rate

Getting Started Building and Running a Process Model Performing a Sensitivity Analysis 4-11

The reduced-sized plot looks like this:

7 If you wish, customize the plot by clicking the right mouse

button in the Plot window to access the plot menu.

Exiting Aspen Plus

1 From the Aspen Plus menu, select File and then select Exit.

The Aspen Plus dialog box appears.

2 Click Yes to save the simulation.

4-12 Performing a Sensitivity Analysis Getting Started Building and Running a Process Model

Getting Started Building and Running a Process Model Meeting Process Design Specifications 5-1

Работа № 4. Определение параметров процесса для достижения качества целевого продукта.

Иногда требуется определить такие условия функционирования процесса, которые бы обеспечивали заданное качество целевого продукта за счет варьирования входных переменных, оказывающих влияние на качество целевого продукта. В нашей задаче целевым продуктом является метилциклогексан (МСН), а его качество определяется заданной мольной долей в дистиллате. Варьируемыми параметрами является мольный поток экстрагента.

Решение этой задачи выполняется с помощью детальной инструкции Aspen Plus?,которая дает подробное представление о решении такого рода задач.

Meeting Process Design

Specifications

In Chapter 4, you used Aspen Plus to tabulate the sensitivity of

MCH distillate purity and column duties to changes in phenol

solvent flow rate. You can also use Aspen Plus to meet a specific

process design target (or design specification) by manipulating any

simulation input variable.

In this chapter, you will use Aspen Plus to meet a process design

specification using either the methylcyclohexane (MCH) recovery

simulation you created in Chapter 3 or the MCH simulation that

was placed in the Examples folder when you installed Aspen Plus.

Allow about 20 minutes for this simulation.

5-2 Meeting Process Design Specifications Getting Started Building and Running a Process Model

Starting Aspen Plus

1 From your desktop, select Start and then select Programs.

2 Select AspenTech | Aspen Engineering Suite | Aspen Plus

11.1 | Aspen Plus User Interface.

The Aspen Plus Startup dialog box appears.

Opening an Existing Simulation

You can open a saved simulation file from the list presented at

startup, or by navigating to a folder containing the saved file. For

this session, either open your saved MCH.apw from Chapter 3, or

use MCH.bkp in the Examples folder.

To open an existing simulation:

1 In the Aspen Plus Startup dialog box, make sure Open an

Existing Simulation is selected

2 In the list, select MCH.apw and click OK.

-or-

1 In the Aspen Plus Startup dialog box, make sure Open an

Existing Simulation is selected

2 In the list box, double-click More Files, or click OK without

selecting anything in the list box.

The Open dialog box appears.

3 Navigate to the directory containing your saved MCH.apw or

navigate to the Examples folder containing MCH.bkp.

Note: The Examples folder is located in:

C:\Program Files\AspenTech\Aspen Plus\Favorites\Examples if

C:\Program Files\AspenTech is the Root Directory selected when

Aspen Plus was installed.

4 Select either MCH.apw or MCH.bkp and click Open.

Note: If the Connect to Engine dialog box appears, see Chapter 9.

The Process Flowsheet window for the MCH column simulation

appears.