Fluidized-bed-combustor modeling

Technical Report · Sat Jan 01 04:00:00 EST 1977

OSTI ID:6615505

Horio, M; Rengarajan, P; Krishnan, R; Wen, C Y

A general mathematical model for the prediction of performance of a fluidized bed coal combustor (FBC) is developed. The basic elements of the model consist of: (1) hydrodynamics of gas and solids in the combustor; (2) description of gas and solids contacting pattern; (3) kinetics of combustion; and (4) absorption of SO/sub 2/ by limestone in the bed. The model is capable of calculating the combustion efficiency, axial bed temperature profile, carbon hold-up in the bed, oxygen and SO/sub 2/ concentrations in the bubble and emulsion phases, sulfur retention efficiency and particulate carry over by elutriation. The effects of bed geometry, excess air, location of heat transfer coils in the bed, calcium to sulfur ratio in the feeds, etc. are examined. The calculated results are compared with experimental data. Agreement between the calculated results and the observed data are satisfactory in most cases. Recommendations to enhance the accuracy of prediction of the model are suggested.

• Research Organization: West Virginia Univ., Morgantown (USA). Coll. of Engineering
• OSTI ID: 6615505
• Report Number(s): N-78-14119; NASA-CR-135164
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
BURNERS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
LIMESTONE
MATHEMATICAL MODELS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES