RadFrac

3-16 • Modeling a Sour Water Stripper Getting Started - Electrolytes

5 In the Operating specifications section, at the Reflux Ratio

field, select Mole and specify 25 as the initial estimate for

reflux ratio. The other operating specification is disabled

because you can only specify one spec when Reboiler is None.

6 The Blocks | B1 | Setup | Configuration sheet is complete:

7 Click to continue.

The Blocks | B1 | Setup | Streams sheet appears. Use this

sheet to describe how the streams are connected to the RadFrac

block.

8 For the SOURWAT feed stream, enter 3 in the Stage field and

Above-Stage in the Convention field.

9 For the STEAM feed stream, enter 10 in the Stage field and

On-Stage in the Convention field.

Because stream VAPOR is connected to the vapor distillate

port, Aspen Plus automatically assigns stream VAPOR as a

vapor phase product from stage 1. Similarly, Aspen Plus

assigns stream BOTTOMS as a liquid phase product from

stage 10. The Streams sheet does not allow flow specifications

for distillate product or bottoms product streams.

10 Click to continue.

The Setup | Pressure sheet appears.

Getting Started - Electrolytes Modeling a Sour Water Stripper • 3-17

1 In the Stage 1 / Condenser pressure field, enter 15 psi.

2 Click to continue.

The Required Input Complete dialog box appears, indicating

that all required input specifications have been entered:

3 Click Cancel to close the dialog box.

You can now enter optional specifications. These specifications

include setting up two design specifications. The first will be a

concentration of 5 ppm NH3 in BOTTOMS, and the second will be

a condenser temperature of 190°F.

1 Click the Blocks | B1 | Design Specs folder.

The Design Specs object manager appears.

2 Click New.

The Create new ID dialog box appears:

3 Click OK to accept the default ID of 1.

The Design Specs | 1 | Specifications sheet appears.

4 In the Type field, click and select Mass purity.

5 In the Target field, enter the value 5.0E-6.

6 Click to continue.

The Design Specs | 1 | Components sheet appears. Use this

sheet to specify where this specification is to be applied, and

what component and phase it applies to.

7 In the Components area, from the Available components

column, select NH3 (ammonia) and click.

8 Click to continue.

The Design Specs | 1 | Feed/Product Streams sheet appears.

9 From the Available streams column, select BOTTOMS and

click.

Дата добавления: 2015-08-20