1. DEVELOPMENT OF A FLUIDIZED BED COAL GASIFICATION TECHNOLOGY
Jerzy TOMECZEK
Department of Process Energy
Silesian University of Technology
Presentation, Gliwice, 22 November 2005

2. RESEARCH ACTIVITY Clean Coal Technologies: · Gasification,
RESEARCH ACTIVITY
Clean Coal Technologies:
·      Gasification,
·      Combustion.
Low Pollutants Emission Combustion:
·      Mechanisms of NOx Formation,
·      NOx Abatement Technologies.
Heat and Mass Transfer in Furnaces:
·      Mathematical Modelling,
·      Semi-Isothermal Combustion Conditions,
·      Fluidized Bed Structure Modelling,
·      Prediction of Deposits in Boilers.

3. INDUSTRIAL FLAME RESEARCH LABORATORY

4. INDUSTRIAL FLAME RESEARCH LABORATORY

5. HIGH TEMPERATURE FURNACE LABORATORY

6. COAL GASIFICATION PILOT PLANT

7. DEVOLATILIZER GASIFICATION
CONCEPT OF ELEKTRO-GAS PLANT
COAL
FUEL GAS
DEVOLATILIZER
LIQUID HYDROCARBONS
CHAR
GASIFICATION
ELECTRIC ENERGY

8. USED IN GASIFICATION EXPERIMENTS
RANGE OF PARAMETERS
USED IN GASIFICATION EXPERIMENTS

9. CHARACTERISTICS OF GASIFIED MATERIALS
CHARACTERISTICS OF GASIFIED MATERIALS

10. FLUIDIZED BED GASIFIER

11. D3 D3 D3 D2 D2 D2
1.5 m
2.0 m
1.5 m
1.3D1
1.3D1 D1 D D D
Characteristic of tested variants of reactor geometry: D=100mm, D1=140 mm, D2=240 mm, D3=300 mm.

12. LOWER GAS HEATING VALUE, MJ/m3 COAL/AIR RATIO kg/kg
Gas heating value as function of coal/air ratio for :
1- coal ● – A and ▲ - B, d= mm;
2- coal ○ – A and Δ - B, d= mm;
3 - char ■ – C and □ - E.

13. LOWER GAS HEATING VALUE,MJ/m3
STEAM/AIR RATIO kg/kg
Gas heating value as function of steam/air ratio:
1- char Δ – C, □ - D and ■ – E, Tb=900oC;
2- coal ● – A and ▲ - B, d= mm, Tb=900oC.

14. DECOMPOSED STEAM XH2O, %
STEAM/AIR RATIO kg/kg
Decomposed steam as function of steam/air ratio:
1- coal ○ – A and ● – B, char ■ – C and Δ – D for Tb=900oC;
2- coal for Tb=800oC by Tomeczek et al. (1983).

15. LOWER GAS HEATING VALUE, PARTICLE RESIDENCE TIME t, min
MJ/m3
PARTICLE RESIDENCE TIME t, min
Gas heating value as function of bed residence time for air gasification and Tb=900oC:
1- coal ● – A and ▲ - B, d= mm; 2- coal ○ – A and Δ - B, d= mm;
3 - char ■ – C and □ - E, d= mm.

16. PARTICLE RESIDENCE TIME t, min
CARBON CONVERSION xc, %
PARTICLE RESIDENCE TIME t, min
Carbon conversion as function of particle residence time for Tb=900oC:
1- coal ○– A and ● - B air gasification; 2- char Δ – C, ◊ - D and □ - E air gasification,▲ – C and ■ -E steam - air gasification.

17. Schematic diagram of the devolatilizer

18. AMOUNT OF LIQUIDS,
kg liquids/kg coal daf
PYROLYSYS TEMPERATURE, oC
Amount of liquids as a function of pyrolysis temperature:
— coal “Siersza” (Tomeczek et al, 1988), — coal “Loy Yang” (Edwards et al, 1985)
— coal “Millmerran” (Edwards et al, 1985), — coal eastern U.S. bituminous (Sass, 1988).

19. COAL DEVOLATILIZATION UNIT DIAGRAM

20. Connection of a coal devolatizer with the boiler
GAS
DEVOLATILIZER
TAR
CHAR
HEAT
AIR
BOILER
WATER
COMBUSTION GASES
STEAM
Connection of a coal devolatizer with the boiler

21. CHARACTERISTICS OF 1, 15, 50 t/h REACTORS
CHARACTERISTICS OF THE 1, 15, 50 t/h DEMONSTRATION SCALE REACTORS
CHARACTERISTICS OF 1, 15, 50 t/h REACTORS