CO2 PRODUCTION PLANTS
The CO2 production plant is based on combustion of desulphurized fuel
gas or liquid oil. The controlled combustion of fuel gas in the generator-reboiler
produces a flue gas rich with CO2.
The flue gas passes in a water scrubber for washing and cooling,then
it goes to the absorbing tower where the CO2 is absorbed in a MEA
solution and carried out down to the bottom vessel.
From the absorber the CO2 rich solution is pumped to the MEA/MEA exchanger
for preheating by means of lean MEA solution coming from the reboiler,before
to be sprayed in the stripper.Dropping down through the packing of
the stripper the rich MEA solution releases the CO2 to the top.The
vapours are cooled in a water cooled exchanger :the condensate is
separated in the demister,while the cooled CO2 gas goes to the low
pressure washing towers. From the reboiler the MEA solution completely
regenerated,is pumped through the MEA/MEA exchanger to be precooled
and to MEA/WATER exchanger to be cooled before entering in the absorber.
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(1.1)
REBOILER
(1.2)
CO2
COOLER
(1.3)
STRIPP.
(1.4)
COND.
SEPAR. |
(2.1)
FLUE GAS
WASHER
(2.2)
MEA/MEA
EXCHANG.
(2.3)
MEA
FILTER
(2.4)
MEA
PUMP |
(2.5)
MEA COOLER
(2.6)
FLUE
GAS SCRUBB.
(2.7)
CO2 ABSORB.
(2.8)
MEA PUMP |
(2.9)
CO2 WASHING TOWER
(2.10)
CO2 WASHING TOWER |
(3.1)
CO2 COMPRES.
(3.2)
INTERCO.
(3.3)
AFTERCO. |
(4.1)
DRY. |
(5.1)
DEOD.
UNIT
(CARB.
PURIF.)
(5.2)
DUST
FILTER |
(6.1)
REFRIG. COMPR.
(6.2)
REFRIG. COND. |
(7.1)
CO2 LIQUEF. |
(8.1)
LIQUID
CO2
STORAGE
TANK
(8.2)
WEIGH.
INSTALL. |
(9.1)
CO2 EVAPOR.
(9.2)
PRESS. REDUC. SYS. |
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|
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| The CO2 gas from the stripper passes
through chemical and water washers to remove possible
entrainements of solution. The CO2 is then compressed
in a non lubricated process two stages compressor and
passed through the automatic molecular sieve dryer to
remove the moisture completely.The activated carbon purifier
and the fine filter removes smelling, impurities and remaining
powders. |
|
The purified gas is sent to the CO2
liquefier, traces of non condensable gases still contained
in the CO2 gas remain gaseous when the CO2 gets liquid
in the liquefier.
Air and these non condensable-gases are used for regeneration
of dryer, the pure liquid CO2 flows to the insulated storage
tank. |
|
From the tank the carbon dioxide can
be taken off to the evaporator and to the utilization
line.
Dependent upon and product requirement, the CO2 can be
used for following services:
• as gaseous CO2 for beverage carbonation or other
use
• for filling into high pressure CO2 cylinders by
means of a pump
• for conversion into Dry Ice blocks or pellets |
|
STANDARD SIZE
|
MOD. (1)
|
Capacity
|
Fuel (1)
|
Power (2)
|
Washing water (3)
|
Cooling water
make-up
|
PLANT AREA
|
Recommended
Storage tank
capacity
|
|
A
|
B
|
|
|
kg/h
|
kg/h
|
Kw
|
m 3 /h
|
m 3 /h
|
m
|
m
|
tons
|
|
PC 5
|
50
|
17
|
30
|
1,8
|
0,8
|
10
|
6
|
5
|
|
PC 10
|
100
|
35
|
45
|
3
|
1,6
|
11
|
7
|
12
|
|
PC 20
|
200
|
70
|
75
|
6,5
|
3,2
|
12
|
8
|
20
|
|
PC 30
|
300
|
105
|
115
|
9
|
4,8
|
14
|
9
|
30
|
|
PC 50
|
500
|
175
|
180
|
15
|
8
|
15
|
10
|
40
|
|
PC 80
|
800
|
280
|
280
|
24
|
12,8
|
16
|
11
|
50
|
|
PC 100
|
1.000
|
350
|
330
|
30
|
16
|
19
|
11
|
70
|
|
PC 125
|
1.250
|
440
|
410
|
37
|
20
|
24
|
12
|
100
|
(1) Diesel oil and/or gas
(2) Excl.cooling tower
(3) According to the water characteristic and to the possible recirculation
of washing water,the consumption can be significantly decreased
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