PROCESS SCHEMATICS 1
CO2 Recovery & O2 Onsite Production &Steam Supply
CO Combustion
Air Filter
Compressor
PSA-CO2 VPSA (O2) Natural Gas Feeding
cooling
water tower
Steam Supply
to the customer
steam
12,3 TPH
Product
Compressor
VSA
GOX
circulating
water 30°C
Natural Gas
soft water
CO
1400 °C
Combustion
Chamber
Flue Gas
only 70% available
150 °C
waste heat soft water
boiler
pre.heater
Product
Compressor
S-removal
Recycle Stream 2
Buffer
Mix
cooling
tower
CO2
PSA
CO2
Cooling Water
Recycle Stream 1
LCO2
Dryer Submicron Filter
off-gas
CO2 iquifier
CO2 Recovery& O2 Onsite Production &Steam Supply
CO Combustion LPR- CO2 VPSA (O2) Natural Gas Feeding
Air Filter
Compressor
cooling
water tower
Steam Supply
to the customer
steam
12,3 TPH
Product
Compressor
VSA
GOX
circulating
water 30°C
Natural Gas
waste
VSA-gas
Flue Gas
only 70% available
soft water
CO
1400 °C
Combustion
Chamber
150 °C
waste heat soft water
boiler
pre.heater
Recycle Stream 2
cooling
tower
Product
Compressor
Liquid Pressure
Rinsing (Rectisol)
CO2
molesieve dryer
Recycle Stream 1
Liquid Pressure
Rinsing (Selexol)
LCO2
off-gas
CO2 iquifier
CO2 Recovery & O2 Onsite Production & Power Supply
CO Combustion
Air Filter
Compressor
PSA-CO2 VPSA (O2) Natural Gas Feeding
cooling
water tower
power to
the customer
Product
Compressor
power
VSA
GOX
Power Turbine
Natural Gas
6 MW
steam
12,3 TPH
soft water
CO
1400 °C
Combustion
Chamber
Flue Gas
only 70% available
circulating
water 30°C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
power
S-removal
Recycle Stream 2
Buffer
Mix
Product
Compressor
CO2
PSA
CO2
Cooling Water
Recycle Stream 1
LCO2
Dryer Submicron Filter
off-gas
CO2 iquifier
CO2 Recovery (PSA +CO Combustion) & O2 Onsite Production &
Power Supply & Membrane N2
Air Filter
Compressor
GAN
cooling
water tower
air
power to
the customer
Product
Compressor
power
air
VSA
GOX
Power Turbine
Natural Gas
6 MW
steam
12,3 TPH
soft water
CO
1400 °C
Combustion
Chamber
Flue Gas
only 70% available
circulating
water 30°C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
power
S-removal
Recycle Stream 2
Buffer
Mix
Product
Compressor
CO2
PSA
CO2
Cooling Water
Recycle Stream 1
LCO2
Dryer Submicron Filter
off-gas
CO2 iquifier
CO2 Recovery & O2 Onsite Production & H2 Electrolyser
CO Combustion PSA-CO2 VPSA (O2) Natural Gas Feeding Auto-Power Producer
Air Filter
water
Compressor
cooling
water tower
H2
electrolyser
Product
Compressor
power
GOX
power
VSA
GOX
Power Turbine
Natural Gas
6 MW
steam
12,3 TPH
soft water
CO
1400 °C
Combustion
Chamber
Flue Gas
only 70% available
circulating
water 30°C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
power
S-removal
Recycle Stream 2
Buffer
Mix
Product
Compressor
CO2
PSA
CO2
Cooling Water
Recycle Stream 1
LCO2
Dryer Submicron Filter
off-gas
CO2 iquifier
CO2 Recovery & O2 Onsite Production & H2 Electrolyser
CO Combustion
Air Filter
PSA-CO2 VPSA (O2) Auto-Power Producer
water
Compressor
cooling
water tower
H2
electrolyser
Product
Compressor
power
GOX
power
VSA
GOX
Power Turbine
6 MW
steam
12,3 TPH
soft water
CO
1400 °C
Combustion
Chamber
Flue Gas
150 °C
waste heat soft water
boiler
pre.heater
Buffer
Mix
cooling
tower
power
S-removal
Recycle Stream 2
circulating
water 30°C
Product
Compressor
CO2
PSA
CO2
Cooling Water
Recycle Stream 1
LCO2
Dryer Submicron Filter
off-gas
CO2 iquifier
CO2 Recovery & O2 Onsite Production
CO-LPG/Sasol-oil Combustion
Air Filter
Compressor
cooling
water tower
LPR-CO2 VPSA (O2)
Product
Compressor
VSA
GOX
cooling
water
LPG - Sasol Oil
CO
Combustion
Chamber
Flue Gas
only 70% available
850 °C
chiller
tower
30 °C
off gas
Dryer
Recycle Stream 2
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
Recycle Stream 1
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
LPG/Sasol-oil Combustion
Air Filter
Compressor
cooling
water tower
LPR-CO2 VPSA (O2)
Product
Compressor
VSA
GOX
cooling
water
LPG - Sasol Oil
CO
Combustion
Chamber
850 °C
chiller
tower
30 °C
off gas
Dryer
Recycle Stream 2
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
Recycle Stream 1
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
CO-LPG/Sasol-oil Combustion LPR-CO2 VPSA (O2)
Air Filter
Compressor
cooling
water tower
power generation H2 production
Product
Compressor
VSA
GOX
power
electrolyser
H2
cooling
water
Power Turbine
steam
10 TPH
LPG - Sasol Oil
soft water
CO
Combustion
Chamber
Flue Gas
only 70% available
850 °C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
30 °C
off gas
Dryer
Recycle Stream 2
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
Recycle Stream 1
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
CO-LPG/Sasol-oil Combustion LPR-CO2 VPSA (O2)
Air Filter
Compressor
cooling
water tower
power generation H2 production
Product
Compressor
VSA
GOX
power
electrolyser
power to
JV
cooling
water
Power Turbine
steam
10 TPH
LPG - Sasol Oil
soft water
CO
Combustion
Chamber
Flue Gas
only 70% available
850 °C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
30 °C
Burner off-gas
off gas
Dryer
Recycle Stream 2
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
Recycle Stream 1
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
LPG/Sasol-oil Combustion LPR-CO2 VPSA (O2)
Air Filter
Compressor
cooling
water tower
power generation H2 production
Product
Compressor
VSA
GOX
power
electrolyser
cooling
water
Power Turbine
steam
10 TPH
LPG - Sasol Oil
H2
power
soft water
CO
Combustion
Chamber
850 °C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
30 °C
Burner off-gas
off gas
Dryer
Recycle Stream 2
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
Recycle Stream 1
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
CO-LPG/Sasol-oil Combustion without R1/R2 LPR-CO2 VPSA (O2)
Air Filter
Compressor
cooling
water tower
Product
Compressor
VSA
GOX
cooling
water
LPG - Sasol Oil
CO
Combustion
Chamber
Flue Gas
only 70% available
850 °C
chiller
tower
30 °C
off gas
Dryer
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
LCO2
steam
CO2 iquifier
CO2 Recovery & O2 Onsite Production
CO-LPG/Sasol-oil Combustion without R1/R2 LPR-CO2 VPSA (O2)
production
Air Filter
Compressor
cooling
water tower
power generation H2
Product
Compressor
VSA
GOX
power
electrolyser
H2
cooling
water
Power Turbine
steam
10 TPH
LPG - Sasol Oil
soft water
CO
Combustion
Chamber
Flue Gas
only 70% available
850 °C
150 °C
cooling
tower
waste heat soft water
boiler
pre.heater
30 °C
off gas
Dryer
Product
Compressor
Scrubber
CO2
MDEA
Stripper
filter
LCO2
steam
CO2 iquifier
PROCESS SCHEMATICS 2
Air Separation Principle
GOX
Air
Crude
GAN
Ar
compander
Cooling
Water Supply
LIN
Compressor
Crude
Argon
Column
Cooling
Water
Raw Argon
cooling
water
return
Main Heat Exchanger
Subcooler
LOX
Regeneration
Gas Heater
molecular
sieve
adsorber
Rectification Column
Cold Box
Regeneration Gas Vent
Air Separation Process Description
Air
Compressor
uAir
Compressor
Filtered air is compressed by a
centrifugal compressor in an oil free
system.
uMolecular Sieve
Adsorbers
Removes water and carbon dioxide from the
air in dual vessels on alternate duty.
Regeneration gas cleans the off-stream
vessel.
uDirect
Cooling
Water
Contact After Cooler
Cools and washes air by direct contact
with cooling water.
uRegeneration Gas
Regeneration
Gas Heater
Cooling
Water
Supply
uChiller
Provides a further stream of cooling water,
chilled by waste gas and nitrogen, for use in
the direct cooler.
Heater
Heats regeneration gas to required
temperature.
Air Separation Process Description
low pressure
upper column
uMain
Main Heat Exchanger
Heat Exchanger
Cools the purified air close to its
liquification point against outgoing
gaseous oxygen and nitrogen product
streams and waste nitrogen. Cooled air
passes to the high pressure column and
the expansion turbine.
uHigh
and Low Pressure Columns
Initial separation of the air into an
enriched oxygen liquid at thesumpof the
high pressure column and nitrogen at the
top. The low pressure column provides the
separation into high purity oxygen ,
nitrogen product, waste nitrogen, and raw
argon feed.
high pressure
lower column
compander
uCompander
Meets process refrigeration
requirements by expanding part of
the cold compressed air.
uCrude
uSubcooler
Subcooler
Subcools enriched oxygen liquid and
liquid nitrogen to provide column
reflux. Liquid nitrogen is also removed
downstream of the subcooler as
product.
Crude
Argon
Column
Argon Column
Raw argon feed from the low pressure
column feeds to the argon column for
additional rectification to produce crude
argon.
Argon Recovery DEOXO Process
off - gas
Hydrogen
LIN
High Purity
Argon
Column
GAN
Compressor
Crude -LOX
Precondensor
Crude
Argon
Column
Heat Exchanger
Dryer
Raw Argon
Deoxo
Process
Main
Condensor
Crude Argon
Cooler
LAR
Argon Recovery DEOXO Process Description
•Crude Argon Column
• DEOXO Process
Deoxo
Process
Separation of the O2/Ar
merge extracted from the LP
column into a sump product
with a low argon content,
returned to the LP column
and a crude argon at the top.
Crude
Argon
Column
The oxygen contained in the
crude argon is separated in a
deoxo by catalytic combustion
with hydrogen.
• Water Main Condensor
Main
Condensor
Raw Argon
Crude
Argon
The water produced is removed
partly by condensing and
completely by the molecular
adsorbers.
• High Purity Argon Column
• Heat Exchanger
Heat Exchanger
The crude argon is
heated up in the
heat exchanger to
ambient
temperature.
High Purity
Argon
Column
The oxygen free crude argon is
separated into a nitrogen rich
residual gas and LAR in the high
purity argon column.
Argon Recovery Process
Direct Rectification
cr.-GOX
GAN
off-gas
LIN
cr.-LOX
packings
Crude Argon
High Purity
Argon Column
99% Ar
1% N2
Argon Condenser
Raw Argon
packings
Crude Argon
Column
GAN or Air
vent
LAR
Argon Recovery Process Description
Direct Rectification
99% Ar
1% N2
• Crude Argon Column
• High Purity Argon Column
Raw argon gas from the low
pressure column is used as
feed gas for the crude argon
column.
In the crude argon column the
oxygen is removed by means of
cryogenic rectification.
Part of the oxygen free crude argon
is withdrawn subcooled and fed to
the pure argon column.
Nitrogen in the pure argon column is
removed by cryogenic rectification.
Liquid argon from the sump is
transferred to the liquid storage
tank.
Crude Argon
Column
High Purity
Argon Column
•Argon Condenser
Argon Condenser
Reflux for the crude argon
column is provided by
condensing the main part of the
O2 free crude argon against the
rich liquid from the pressure
column in the top condenser.
Standard N2 - Generator Process
GAN
off gas
Heater
Air
Filter
Compressor
Condenser
Adsorber
Cooler
Liquid
Storage
Vessel
Main Heat Exchanger
Expansion
Turbine
LIN
LIN
Front End
Rectification Column
Back - up System
Vaporizer
LIN Assist N2 - Generator Process
GAN
off gas
Heater
Air
Filter
Compressor
Condenser
Adsorber
Cooler
Liquid
Storage
Vessel
Main Heat Exchanger
LIN
LIN
Rectification Column
Back - up System
Vaporizer
O2 - Generator Process
1)
Molecular
Sieve
Adsorber
Product
Compressor
GOX
Heater
Chiller
Subcooler
Cooling Water
Liquid
Storage
Vessel
Main Heat Exchanger
Direct Contact
After Cooler
Air
Filter
Front End
1) without booster
LOX
LOX
Compressor
Rectification
Back - up System
Evaporator
O2 - Generator Process
2)
molecular
sieve
adsorber
Product
Compressor
Booster
GOX
Heater
Chiller
Subcooler
Cooling Water
Direct Contact
After Cooler
Air
Filter
Main Heat Exchanger
Front End
2) with booster
LOX
LOX
Compressor
Rectification
Back - up System
Evaporator
Oxygen / Nitrogen Generators
Process Description
uAir
Booster Compressor
Provides a stream of purified air at
sufficiently high pressure to
vaporize pressurized liquid oxygen
uAir
Compressor
Filtered air is compressed by a
centrifugal compressor in an
oil-free system.
Contact After Cooler
Cools and washes air by direct
contact with cooling water.
uMain
uDirect
molecular
sieve
adsorber
uMolecular
Sieve Adsorbers
Removes water and carbon dioxide
from the air in dual vessels on
alternate duty. Regeneration gas
cleans the off-stream vessel.
Main Heat Exchanger
Heat Exchanger
Cools the purified air to appr. its
liquification point against outgoing
gaseous oxygen and nitrogen streams.
Cooled air passes to the high pressure
column and the expansion turbine.
uExpansion Turbine
Meets process refrigeration
requirements by expanding part
of the cold compressed air.
Oxygen / Nitrogen Generators
Process Description
uHigh
low
pressure
and Low Pressure
üColumns
uSubcoolers
Subcooler
Initial separation of the air into
an oxygen-rich liquid at the
sump of the high pressure
column and nitrogen at the top.
Oxygen
2 columns
rectification
high
pressure
Subcools oxygen-rich liquid and
liquid nitrogen to provide
column reflux.
Thelow pressure column
provides the separation into
oxygen and nitrogen products.
uLiquid
Storage Tanks
optional due to tailor made
concepts
LIN
Nitrogen
1 column
rectification
LOX