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

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.
Authors:
; ; ;  [1]
  1. Otto-von-Guericke-Univ. of Magdeburg (Germany). Dept. Heat Transfer and Energy Economy
Publication Date:
OSTI Identifier:
355799
Report Number(s):
CONF-9705116-
ISBN 0-7918-1557-9; TRN: IM9931%%320
Resource Type:
Conference
Resource Relation:
Conference: 14. international conference on fluidized bed combustion, Vancouver (Canada), 11-16 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the 14. international conference on fluidized bed combustion: Volume 1; Preto, F.D.S. [ed.] [Canada Centre for Mineral and Energy Technology, Ottawa, Ontario (Canada). Energy Technology Centre]; PB: 666 p.
Publisher:
American Society of Mechanical Engineers, New York, NY (United States)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 01 COAL, LIGNITE, AND PEAT; FLUIDIZED-BED COMBUSTORS; PERFORMANCE; LIGNITE; ANTHRACITE; REEDS; SEWAGE SLUDGE; COMBUSTION PROPERTIES; MATHEMATICAL MODELS; HYDRODYNAMICS; FUEL-AIR RATIO