Fluidization, combustion and emission behavior of biomass in fluidized bed combustion units

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:355799

Kaeferstein, P; Tepper, H; Gohla, M; Reimer, H ^[1]

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1. Otto-von-Guericke-Univ. of Magdeburg (Germany). Dept. Heat Transfer and Energy Economy

Gaseous components were measured over the height and the cross section inside a circulating fluidized bed riser with a thermal power of 60 kW. The combustion behavior of lignite (German brown coal), hard coal, biomass (China reed), and sewage sludge was investigated. The burn-out behavior was investigated by in-situ and real time measurement of the oxygen consumption using solid electrolyte sensor probes within a bubbling fluidized bed combustor with 15 kW thermal power. Non-uniform oxygen concentration profiles were found over the small riser cross-section which differed for the various fuels. The feed location and the fuel distribution also influences the horizontal oxygen profile. The reasons for the non-uniformity of the horizontal oxygen concentration profile are the combustion of volatile matter and the recirculation of char near the walls. A simulation model was developed to calculate the hydrodynamics and the oxygen consumption for the difference fuels inside the CFBC riser.

• OSTI ID: 355799
• Report Number(s): CONF-9705116--; ISBN 0-7918-1557-9
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
09 BIOMASS FUELS
ANTHRACITE
COMBUSTION PROPERTIES
FLUIDIZED-BED COMBUSTORS
FUEL-AIR RATIO
HYDRODYNAMICS
LIGNITE
MATHEMATICAL MODELS
PERFORMANCE
REEDS
SEWAGE SLUDGE