Description：
Process flow introduction:
Based on the clean coal gasification technology realizing cascade conversion, the company has developed a new coal gasification technology, i.e. entrained-flow gasification system, this system use the pulverized coal gasification technology. It is mainly composed of coal mill system, pulverized coal gasification system, pneumatic conveying system, water treatment system and distributed control system, oxygen generation system, etc.
After treated by coal mill system, pulverized coal is conveyed to the burner by nitrogen, mix and reacts (oxidation-reduction) with the gasification agent in the gasifier, and the molten slag flows into the slag pool.
Raw gas flows through gasifier bottom to enter heat exchangers (I, II, III, IV), fly-ash filter and desulfurization system for cooling down, dedusting and desulphurization, at last the clean gas is sent to users.
Features:
Clean: good pollution control, H2S≤20mg/Nm3, dust≤10mg/Nm3 in the coal gas;
Efficient: high gasification reaction temperature, liquid slagging, low fly ash content, carbon conversion rate≥98%;
Wide coal adaptability: using pulverized coal gasification technology, wide coal utilization demand;
Gasification method: oxygen-enriched air or pure oxygen;
Compared to high pressure entrained-flow gasification technology, such as Shell and Texaco, the technology is matched with the downstream users’ technological process, and the construction and operation cost are greatly decreased.
Technical parameters:
|
System parameters
|
|
No.
|
Designation
|
Unit
|
Parameters
|
|
10kNm3/h
|
20kNm3/h
|
40kNm3/h
|
|
1
|
design pressure
|
kPa
|
50~1000
|
50~1000
|
50~1000
|
|
2
|
design temperature
|
℃
|
1600
|
1600
|
1600
|
|
3
|
operation pressure
|
kPa
|
20~1000
|
20~1000
|
20~1000
|
|
4
|
operation temperature
|
℃
|
1500
|
1500
|
1500
|
|
5
|
application coal
|
|
anthracite, bitumite, fly ash
|
|
6
|
coal size(90%)
|
mm
|
~0.15
|
~0.15
|
~0.15
|
|
7
|
effective gas composition
(CO+H2+CH4)
|
%
|
65~90
|
65~90
|
65~90
|
|
8
|
load adjustment
|
%
|
50~110
|
50~110
|
50~110
|
|
9
|
steam pressure
|
MPa
|
~2.5
|
~2.5
|
~2.5
|
|
10
|
steam output
(external supply)
|
t/h
|
~6
|
~12
|
~18
|
|
11
|
heat value of coal gas
(oxygen-enriched air)
|
kcal/Nm3
|
≥2000
|
≥2000
|
≥2000
|
|
12
|
heat value of coal gas
(pure oxygen)
|
kcal/Nm3
|
≥2400
|
≥2400
|
≥2400
|
|
13
|
tar/phenol water
|
kg/h
|
0
|
0
|
0
|
|
14
|
oxygen consumption/kNm3
(CO+H2+CH4)
|
Nm3/ kNm3
|
330~400
|
330~400
|
330~400
|
|
15
|
cold gas efficiency
|
%
|
75~81
|
75~81
|
75~81
|
|
16
|
coal heat value
|
kcal/kg
|
＞5000
|
|
17
|
application fields
|
|
ceramic, alumina, metallurgy, coking,power generation, etc.
|
Technical specification：
- 10kNm³/h Entrained-flow Gasification System
- 20kNm³/h Entrained-flow Gasification System
- 40kNm³/h Entrained-flow Gasification System
Common problem