燃煤循环流化床锅炉排放影响因素分析

阐述了CFB锅炉燃烧过程中N_2O的产生、消解机理,分析了燃料特性、床温、过量空气系数和煤中的矿物质成分等诸多因素对CFB锅炉N_2O排放的影响。分析了生物质与煤混合燃烧,炉膛后再燃,在CFB锅炉中添加催化剂以及反向分级燃烧等新型低N_2O燃烧技术,为CFB锅炉低N_2O排放技术指明了研究方向。 The formation and destruction mechanism of N_2O in circulating fluidized bed boiler were expatiated in detail. The influences of coal characteristics and operation parameters of coal-fired CFB boiler such as bed temperature, excessive air coefficient, mineral composition of coal on N_2O emissions were discussed. The new de-N_2O combustion technology, such as blend combustion of biomass and coal, afterburning, appending activator to CFB boiler, reversed air staging were discussed in the end, which guide the development of CFB boiler de-N_2O combustion