Ammonia Recovery Simulation

1

Modeling and Simulation

Example-1

Ammonia Recovery

4

Hysys environment

Stat new simulation

5

Simulation basis manager:

Enter primary simulation data like

component,

thermodynamic package, or

reactions.

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Feed

Flowrate: 10000 lb/hr

Water: 20 wt%

Ammonia

Saturated vapor at 250 psia

Q=-5.8106 J

P=0

H=0

P=150 psia

Expansion valve Condenser Separator

Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

We want to know what are the composition and flow rate of the

vapor and liquid stream?

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Simulation procedure

Step one:

Define components

Step two:

Choose thermodynamic

model

Step three:

Build simulation flow

diagram

Step four:

Enter stream data

Step five:

Enter unit operation data

8

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 J

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

9


Step one:

Define components

Water

ammonia

Step two:

Choose thermodynamic model

SRK

Step three:

Build simulation flow diagram

Step four:

Enter stream data

Feed

Saturated vapor at P=250 psia

20 wt% water

80 wt% Ammonia

Mass Flow rate: 10000 (lb/hr)

Step five:


Condenser

Q=-5.8*106 J

P=0 Psi

Expansion valve

Isentropic process

P=150 Psi

Flash

Adiabatic flash

P=0 Psi

10

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 J

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

11

Starting Simulation

Add Components

Define Thermodynamic package

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Step one:

Define components

Water

ammonia

Step two:


SRK

Step three:


Step four:

Enter stream data

Feed


20 wt% water

80 wt% Ammonia


Step five:


Condenser

Q=-5.8*106 J

P=0 Psi

Expansion valve

Isentropic process

P=150 Psi

Flash

Adiabatic flash

P=0 Psi

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Create new component list

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Create new component list

Search and add library

components

Change the name of

new component list

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Write the name of chemical

Formula of the component

When you find it click Add Pure

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Write the name of chemical

Formula of the component

When you find it click Add Pure

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All components were added

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This step was completed

Component list view can be closed

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Step one:

Define components

Water

ammonia

Step two:


SRK

Step three:


Step four:

Enter stream data

Feed


20 wt% water

80 wt% Ammonia


Step five:


Condenser

Q=-5.8*106 J

P=0 Psi

Expansion valve

Isentropic process

P=150 Psi

Flash

Adiabatic flash

P=0 Psi

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Next step id defining

thermodynamic fluid package

Go to the Fluid Package section

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Click Add to create new fluid package

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To define Thermodynamic fluid package

Select if from the list

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Choose SRK as

Thermodynamic fluid package

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Close the Fluid package

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Components and thermodynamic package were

defined now process flow diagram can be developed

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Save your file

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Draw simulation flow diagram

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process flow diagram should e

developed in Simulation Environment

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Simulation

environment

of HYSYS

Object Palette

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Step one:

Define components

Water

ammonia

Step two:


SRK

Step three:


Step four:

Enter stream data

Feed


20 wt% water

80 wt% Ammonia


Step five:


Condenser

Q=-5.8*106 J

P=0 Psi

Expansion valve

Isentropic process

P=150 Psi

Flash

Adiabatic flash

P=0 Psi

34

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 J

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

35

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 J

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

1

2 3

4

5

6

1, 2, 3, 4, and 5 are material stream

6 is energy stream

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Input stream data and operating

conditions

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Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

52


Step one:

Define components

Water

ammonia

Step two:


SRK

Step three:


Step four:

Enter stream data

Feed


20 wt% water

80 wt% Ammonia


Step five:


Condenser

Q=-5.8*106 J

P=0 Psi

Expansion valve

Isentropic process

P=150 Psi

Flash

Adiabatic flash

P=0 Psi

53

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

54

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

66

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

70

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

73

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

75

Feed


Water: 20 wt%

Ammonia


Q=-5.8106 Btu/hr

P=0

H=0

P=150 psia


Vapour

Liquid

Feed

Adiabatic flash

P=0 psia

Example 1:

We want to know what are the composition and flow rate of the vapor

and liquid stream?

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Sensitivity analysis

How does heat recovery in cooler change the

amount of ammonia recovery in process?

How does pressure drop in valve change the


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Change heat recovery (independent variable)

Check the effect of ammonia recovery (dependent variable)

Change Pressure drop in valve (independent variable)


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Use spreadsheet for user defined

calculations in hysys

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Input variables which

you want to use for your calculations

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Write the formula

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Start case study

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Change heat recovery (independent variable)


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Input variables for case study

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Define the case study

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Define independent and

dependent variables

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Define the range for independent variable

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Change Pressure drop in valve (independent variable)


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Creating report in HYSYS

When process simulation is completed usually

it is necessary to create a report which can

contain information about

Process

Process flow streams

Material streams and Energy streams

Unit operations

120

We want to have specific unit sets for report

Like:

Mass flowrate in lb/hr,

Pressure in psia

Ammonia Recovery Simulation

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Transcript of Ammonia Recovery Simulation