Background of new decision search for coal processing in Ukraine icon

Background of new decision search for coal processing in Ukraine




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НазваBackground of new decision search for coal processing in Ukraine
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The study of kinetics of coal conversion process and its energy supply due to complete oxidation of its part has been carried out. The process does not require to use oxygen, steam and can utilize coal with high content of ash (up to 40%).The data obtained are sufficient for designing and constructing a pilot plant.

Background of new decision search for coal processing in Ukraine:

  • Mining of fossil fuels in Ukraine provides the needs in: oil by 10 - 12%, natural gas by 20-25%, coal by 100%.

  • Gas deficit in Ukraine is about 55 milliard m3. The lack of it is compensated by import.

  • The explored reserves of coal in Ukraine exceed 50 milliard tons, its amount being sufficient for more than 400 years (~30% is salt coal which does not find its application in industry).

Characteristic of technologies of coal conversion in syngas

Index


Method

Lurgi

Winkler

Koppers-Totzek

Теxаcо

Melted slag

1. process type

steam-oxygen

Водяна / water

2. reactor type

stationary

fluidized bed

dust flow

coal-water suspension

coal-water

suspension

3. gas yield, m3 per t. of coal

1350

1500

1900

-

1880

4. consumption, kg/1000m3SG

Steam

900

300

50

-

-

water

-

-

-

-

355

5. oxygen consumption, kg/1000m3 SG

230

325

500-640

-

0,0

6. degree of carbon conversion, %

90

85

89

90-95

99

7. temperature in the reaction zone,0С

750-1100

820-1100

1300-1500

1100-1500

1500-1800

8. pressure, MPa

2–3

0,10–0,14

1,5

2-3

3

9. residence time, sec

?5000

100–500

1

-

0,3–0,5

10. reactor volume, m3

157

550

28

(2 форсунки/ injectors)

-

40 три зони / three zones

11. height of the melted layer, m

-

-

-

-

до 1

12. calorific value of SG, MJ/m3

10,6

9,2

10,6

10,2

11,7

13. efficiency of gasification, %

75-85

65-85

69-75

74

90

14. composition of SG %vol.:

СО

21

35

57,2

52,3

46,9

CO2 + H2S

28

22

10,8

12,7

0,1

H2

41

41

30,7

33,2

50,2

CH4

9

1

0,1

-

0,9

N2

1

1

1,2

-

0,2




East-Ukrainian Volodymyr Dahl National University

Мolodizhny bl., 20a, Luhansk, Ukraine, 91034,

tel./fax +380 (642) 41-84-07, e-mail onti@snu.edu.ua

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