大型循环流化床锅炉掺烧石油焦N2O排放特性研究  

A Research on N_2O Emission Characteristics of Big Circulating Fluidized Bed Boiler Burning Co-firing of Coal and Petroleum Coke

作　　者：张中林 梁财[2] 

机构地区：[1]南京工程学院电力仿真与控制工程中心,江苏南京210013 [2]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096

出　　处：《锅炉技术》2013年第2期20-24,共5页Boiler Technology

基　　金：国家重点基础研究发展计划基金资助项目(2006CB705806)

摘　　要：在440t/h大型循环流化床锅炉上进行了燃烧不同比例煤和石油焦混合燃料的N2O排放特性试验研究。研究了不同焦煤比、炉膛温度、过量空气系数和钙硫摩尔比等参数对N2O排放特性的影响。试验结果表明,随着焦煤比增大,N2O排放浓度升高;对于不同焦煤比的燃料,随着过量空气系数增加,N2O排放浓度均升高。床温对N2O排放浓度影响较敏感,随着床温的升高,N2O排放浓度降低。钙硫摩尔比增加,N2O排放浓度增加。试验结果对大型循环流化床锅炉掺烧石油焦运行具有重要的指导意义。An experimental study was performed of N2O emission characteristics on 440t/h CFB(Circulating Fluidized Bed)boiler co-firing of coal and petroleum coke with different mixture ratio.The effects of several parameters,such as different mixture ratio,bed temperature,excess air coefficient and Ca/S molar ratio on N2O emission were verified.The result show that the N2O concentration in flue gas rose with the increase of the ratio of petroleum over coal,excess air coefficient and Ca/S molar ratio.The bed temperature was sensitive to the N2O emission concentration,when the bed temperature increase,the N2O concentration dropped.The result data was very important significance for the large CFB(Circulating Fluidized Bed)Boiler burning coal and petroleum coke.

关 键 词：循环流化床 掺烧 石油焦 N2O 

分 类 号：TK229.6+6[动力工程及工程热物理—动力机械及工程]