锅炉燃煤方式对痕量元素分布的影响  

The Impact of Coal Combustion Modes of a Boiler on the Distribution of Trace Elements

作　　者：余亮英[1] 陆继东[1] 张娟[1] 吴戈[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《热能动力工程》2004年第2期116-118,123,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究发展规划基金资助项目(G1999022212);国家科技合作重点项目;中法化学与环境工程研究(2001CB711203)

摘　　要：综述了目前国内外锅炉燃烧方式对痕量元素分布的影响。测定了我国5台不同炉型和容量的工业锅炉底灰和飞灰中痕量元素的分布情况,结果表明:流化床燃烧时煤中痕量挥发性元素的蒸发较大;不易挥发痕量元素的分布不受炉型的影响;工业锅炉容量增大时,痕量元素在细颗粒上富集;飞灰颗粒越小,富集越多。A broad overview is given of the impact of boiler combustion modes introduced both at home and abroad on the distribution of trace elements. Measurements were taken of the distribution of trace elements in bottom ash and fly ash for five Chinese industrial boilers of different models and power ratings. The results of the measurements indicate that fluidized bed combustion can lead to an enhancement of evaporation of volatile trace elements and the distribution of trace elements not tending to volatile will not be affected by the specific type of boilers. With the increase in power capacity of industrial boilers an enrichment of trace elements can be observed in fine particles. The smaller the fly ash particle size, the higher will be the enrichment of the trace elements.

关 键 词：流化床 链条炉 痕量元素 富集因子 

分 类 号：TK16[动力工程及工程热物理—热能工程]