THERMOCHEMICAL CONVERSION: DIRECT COMBUSTION - Biomass as a Sustainable Energy Source for the Future - page 285

Raw coal

Bulk regulator

Gas combustion

Swinging
cut-off gates

Char
combustion

Ash

+ Grate belt +

Drying and
heating Ignition Char combustion Burnout

Combustion stretch

FIGURE 9.6 The combustion process on a traveling-grate stoker.(Source: Reproduced with
permission from Adrian et al. (1986). © TÜV Media GmbH - TÜV Rheinland Group.)

19

11

1 2

~

4

5

9

6

12

18

17

3

8

10

15

13

16

7

14

13. Primary air
14. Secondary air
15. Bottom ash
16. Fluid bed heat exchanger air
17. Blowers
18. Feed water
19. Drum
FIGURE 9.7 Schematic representation of a coal-fired CFB plant.(Source: Reproduced with
permission from Koornneef et al.(2007). © Elsevier.)

1. Coal bunker
2. Limestone bunker
3. Coal crusher
4. CFB combustor
5. Cyclone
6. Convective pass

7. Air preheater
8. Electrostatic filter
9. Stack
10. Fluid bed heat exchanger
11. Turbo generator
12. District heating