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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:

 

  1. 10kNm³/h  Entrained-flow Gasification System
  2. 20kNm³/h  Entrained-flow Gasification System
  3. 40kNm³/h  Entrained-flow Gasification System