|
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
I ndex |
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
|
E ast-Ukrainian Volodymyr Dahl National University Мolodizhny bl., 20a, Luhansk, Ukraine, 91034, tel./fax +380 (642) 41-84-07, e-mail onti@snu.edu.ua |
