FLUE GAS
FROM GASIFIER
H2
LEGEND
STEAM
N2
N2
F.G.
CO2
MEA
CH4
CATALYTIC
CONVERTER
METHANE
MEA-01
MEA-02
MEA-03
CO
H2
LIGNITE
CH4
HYDROGEN
PRODUCER
CO
CONVERTOR
ASH
GAS SCRUBBER
04
ST
NaHCO3
PURE MEA
06
ST
CO2 STRIPPER
05
PURE H2 FOR
FULE CELL
SATURATED CO2
S
T
E
A
M
MEA -07
FLUE
GAS
P1
BOILER
CO2 CAPTURE PILOT PLANT
OPERATING PROCEDURE FOR CO2 SEQUESTRATION
UNIT.
1. There are three Mono Ethano Amine (MEA) tanks called
MEA-1,2,3 and one Saturated , CO2 Rich -MEA tank No.7
and one Pure MEA tank no 6. MEA from pure tank-6 is
transferred to MEA -1,2,3.
2. The flue gasses contain Nitrogen and trace impurities
like SO2 and NO2,etc and CO2 up to 17- 19%. These
come out at an elevated temperature from the Boiler /
Gasifier generator and are released first into the Alkali
Scrubber No.4 and then into MEA Tank 2 & 3 for
stripping the same of CO2 after this the balance N2 gas
is vented to the atmosphere.
3. The CO2 rich MEA Solvent is then taken to the stripper
and the CO2 is stripped at 120°C by using Steam from
the boiler by means of a SS Coil placed in the stripper
Tank No.5 via tank No. 7 and using pump.
4. The Pure CO2 is taken to the CO converter which has
burning Lignite Briquettes and once the same is passed,
the CO2 converts itself into CO. The lean or purified MEA
is taken to the Pure MEA Tank No.6.
5. The CO is in heated condition and taken to the Hydrogen
producer where the Steam is mixed with CO to produce
CO2 and H2 and this mixture is sent to MEA-1 tank to
strip the same of CO2 and pure Hydrogen is obtained.
Once the Hydrogen is produced then the same is taken
to the Fuel Cell to produce power or for production of
Methane in the Methane converter.
6. The Methane producer contains a mixed bed catalyst to
convert a mixture of CO, H2 and steam into Methane.
7. The combustion gas analyzer is used to test the quality
of the Feed gas to the Boiler or the Generator.
1.
2.
3.
4.
5.
- 1” Nb
- 11.9 m
- 9.5 m
21.4 m (22 m)
MEA line
SS- 304 (1” Nb)
(i).
Sat tank to stripper
- 4.5 m
(ii).
MEA, 1,2,3 to saturated
- 7.5 m
(iii).
Stripper tank to pure MEA
- 13.5 m
(iv).
Pure MEA to MEA 1,2,3
- 9.5 m
(v).
Inter connection 1,2,3
- 4.5 m
39.5 m
Flue Gas
- MS 3” Nb (insulated)
(i)
Boiler to scriber
- 21 m
(ii)
Gasifier to scriber
- 9.5 m
30.5 m (31 m)
CO2 & CO
- MS 1” Nb
(i)
CO2 stripper to CO converter
-2m
(ii)
CO stripper to H2 & Methane converter
- 9.5 m
11.5 m (12 m)
Hydrogen
MS 1” Nb
(i)
H2 producer to MEA -1
- 5.5 m
(ii)
Catalytic converter to CH4
- 4.5 m
(iii)
Extra piping for Hydrogen
- 4.0 m
14.0 m
Steam Pipe- Seam less steam pipe
(i) Boiler to Stripper
(ii) Stripper to H2 producer