Fines recycle modeling for an atmospheric fluidized-bed coal combustor. Final report
A fine carbon combustion model developed by General Atomic Company (GA) was modified to predict combustion efficiencies as a function of several process variables in the Babcock and Wilcox (B and W) 6 ft by 6 ft atmospheric fluidized-bed coal combustor. The coal fines combustion kinetics were determined using the model and fines recycle test data from the 6 ft by 6 ft facility. Combining the combustion model and empirically determined coal fines kinetics, the overall combustion efficiency in the 6 ft by 6 ft facility was determined as a function of fines recycle rate, superficial gas velocity, bed depth, freeboard length, and fines re-entry temperature. The results of the model indicate that a fines recycle rate of approximately 2.5 times the coal feed rate will be required to achieve a 99% combustion efficiency in the 6 ft by 6 ft facility using the current operating parameters.
- Research Organization:
- General Atomic Co., San Diego, CA (USA)
- OSTI ID:
- 6230840
- Report Number(s):
- EPRI-CS-2010; ON: DE81904223
- Country of Publication:
- United States
- Language:
- English
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AEROSOL WASTES
ASHES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL FINES
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
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FLY ASH
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PYROLYSIS PRODUCTS
REACTION KINETICS
RESIDUES
THERMOCHEMICAL PROCESSES
VELOCITY
WASTES