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DEVELOPMENT OF A FLUIDIZED BED COAL GASIFICATION
TECHNOLOGY   Jerzy TOMECZEK Department of
Process Energy Silesian University of
Technology     Presentation, Gliwice, 22 November
2005
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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.
 
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INDUSTRIAL FLAME RESEARCH LABORATORY
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INDUSTRIAL FLAME RESEARCH LABORATORY
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HIGH TEMPERATURE FURNACE LABORATORY
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COAL GASIFICATION PILOT PLANT
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CONCEPT OF ELEKTRO-GAS PLANT
COAL
FUEL GAS
DEVOLATILIZER
LIQUID HYDROCARBONS
CHAR
GASIFICATION
ELECTRIC ENERGY
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RANGE OF PARAMETERS USED IN GASIFICATION
EXPERIMENTS
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CHARACTERISTICS OF GASIFIED MATERIALS  
   
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FLUIDIZED BED GASIFIER
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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 D100mm, D1140 mm, D2240 mm, D3300
mm.
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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, d1.0-1.5 mm 2- coal ? A and ? - B,
d0.5-1.0mm 3 - char C and ? - E.
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LOWER GAS HEATING VALUE,MJ/m3
STEAM/AIR RATIO kg/kg
Gas heating value as function of steam/air ratio
1- char ? C, ? - D and E, Tb900oC 2-
coal ? A and ? - B, d1.0-1.5 mm, Tb900oC.
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DECOMPOSED STEAM XH2O,
STEAM/AIR RATIO kg/kg
Decomposed steam as function of steam/air ratio
1- coal ? A and ? B, char C and ? D
for Tb900oC 2- coal for Tb800oC by Tomeczek et
al. (1983).
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LOWER GAS HEATING VALUE, MJ/m3
PARTICLE RESIDENCE TIME t, min
Gas heating value as function of bed residence
time for air gasification and Tb900oC 1- coal
? A and ? - B, d1.0-1.5 mm 2- coal ? A and
? - B, d0.5-1.0mm 3 - char C and ? - E,
d0.5-1.5mm.
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CARBON CONVERSION xc,
PARTICLE RESIDENCE TIME t, min
Carbon conversion as function of particle
residence time for Tb900oC 1- coal ? A and ?
- B air gasification 2- char ? C, ? - D and ?
- E air gasification,? C and -E steam - air
gasification.
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Schematic diagram of the devolatilizer
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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).
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COAL DEVOLATILIZATION UNIT DIAGRAM
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COAL
GAS
DEVOLATILIZER
TAR
CHAR
HEAT
AIR
BOILER
WATER
COMBUSTION GASES
STEAM
Connection of a coal devolatizer with the boiler
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CHARACTERISTICS OF THE 1, 15, 50 t/h
DEMONSTRATION SCALE REACTORS  
CHARACTERISTICS OF 1, 15, 50 t/h REACTORS