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7/27/2019 Ammonia Recovery (2)
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Modeling and Simulation
Example-1
Ammonia Recovery
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Hysys environment
Stat new simulation
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Simulation basis manager:
Enter primary simulation data likecomponent,
thermodynamic package, or
reactions.
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 J
P=0
H=0
P=150 psia
Expansion valveCondenser 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
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 J
P=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Simulation procedure
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:
Enter unit operation data
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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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 J
P=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Starting Simulation
Add Components
Define Thermodynamic package
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Simulation procedure
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:
Enter unit operation data
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 listSearch and add library
components
Change the name of
new component list
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Write the name of chemical
Formula of the componentWhen you find it click Add Pure
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Write the name of chemical
Formula of the componentWhen 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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Simulation procedure
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:
Enter unit operation data
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
environmentof HYSYS
Object Palette
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Simulation procedure
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:
Enter unit operation data
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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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 JP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 J
P=0
H=0
P=150 psia
Expansion valveCondenser Separator
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 operatingconditions
Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Simulation procedure
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:
Enter unit operation data
Condenser
Q=-5.8*106 J
P=0 Psi
Expansion valve
Isentropic process
P=150 Psi
Flash
Adiabatic flash
P=0 Psi
Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
AmmoniaSaturated vapor at 250 psia
Q=-5.8106 Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
Ammonia
Saturated vapor at 250 psia
Q=-5.8106 Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
Example 1:
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Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
Ammonia
Saturated vapor at 250 psia
Q=-5.8106
Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
p
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Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
Ammonia
Saturated vapor at 250 psia
Q=-5.8106
Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
p
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Example 1:
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Feed
Flowrate: 10000 lb/hr
Water: 20 wt%
Ammonia
Saturated vapor at 250 psia
Q=-5.8106
Btu/hrP=0
H=0
P=150 psia
Expansion valveCondenser Separator
Vapour
Liquid
Feed
Adiabatic flash
P=0 psia
p
We want to know what are the composition and flow rate of the vapor
and liquid stream?
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S i i i l i
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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
amount of ammonia recovery in process?
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Change heat recovery (independent variable)
Check the effect of ammonia recovery (dependent variable)
Change Pressure drop in valve (independent variable)
Check the effect of ammonia recovery (dependent variable)
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Use spreadsheet for user defined
calculations in hysys
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Input variables whichyou want to use for your calculations
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Write the formula
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S iti it l i
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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
amount of ammonia recovery in process?
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Start case study
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Change heat recovery (independent variable)
Check the effect of ammonia recovery (dependent 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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Sensitivity analysis
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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
amount of ammonia recovery in process?
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Change Pressure drop in valve (independent variable)
Check the effect of ammonia recovery (dependent variable)
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Creating report in HYSYS
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Creating report in HYSYS
When process simulation is completed usuallyit is necessary to create a report which can
contain information about
Process Process flow streams
Material streams and Energy streams
Unit operations
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We want to have specific unit sets for report
Like:
Mass flowrate in lb/hr,Pressure in psia
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