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Title: Combustion in fluidized beds

Circulating fluidized-bed (CFB) combustion systems have become popular since the late 1970s, and, given the current level of activity in the area,it is clear that this technology has a stable future in the boiler market. For standard coal combustion applications, competition is fierce with mature pulverized-fuel-based (PF) technology set to maintain a strong profile. CFB systems, however, can be more cost effective than PF systems when emission control is considered, and, as CFB technology matures, it is expected that an ever-increasing proportion of boiler installations will utilize the CFB concept. CFB systems have advantages in the combustion of low-grade fuels such as coal waste and biomass. In competition with conventional bubbling beds, the CFB boiler often demonstrates superior carbon burn-out efficiency. The key to this combustion technique is the hydrodynamic behavior of the fluidized bed. This article begins with a description of the fundamental fluid dynamic behavior of the CFB system. This is followed by an examination of the combustion process in such an environment and a discussion of the current status of the major CFB technologies.
Authors:
;  [1]
  1. (CSIRO, Div. of Mineral and Process Engineering, Clayton, Victoria 3168 (AU))
Publication Date:
OSTI Identifier:
6654215
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemical Engineering Progress; (USA); Journal Volume: 86:7
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 42 ENGINEERING; 09 BIOMASS FUELS; BIOMASS; COMBUSTION PROPERTIES; COAL; FLUIDIZED-BED COMBUSTION; FLUIDIZED-BED COMBUSTORS; EFFICIENCY; FUEL SLURRIES; FLUIDIZED BED BOILERS; HYDRODYNAMICS; PULVERIZED FUELS; BOILERS; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMBUSTION; COMBUSTORS; DISPERSIONS; ENERGY SOURCES; FLUID MECHANICS; FOSSIL FUELS; FUELS; MATERIALS; MECHANICS; MIXTURES; OXIDATION; RENEWABLE ENERGY SOURCES; SLURRIES; SUSPENSIONS; THERMOCHEMICAL PROCESSES 014000* -- Coal, Lignite, & Peat-- Combustion; 421000 -- Engineering-- Combustion Systems; 092000 -- Biomass Fuels-- Combustion-- (1990-); 010800 -- Coal, Lignite, & Peat-- Waste Management