O_2/CO_2气氛下循环流化床煤燃烧SO_2排放  

SO_2 Emission From a Coal-Fired Circulating Fluidized Bed Combustor Under O_2/CO_2 Atmosphere

作　　者：段伦博[1] 周骛[1] 屈成锐[1] 陈晓平[1] 赵长遂[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《工程热物理学报》2012年第1期151-154,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划项目(No.2011CB707301)

摘　　要：在热输入功率50 kW的循环流化床O_2/CO_2燃烧试验装置上研究燃煤SO_2排放特性及石灰石脱硫机理。结果发现,未添加石灰石时,O_2/CO_2气氛下SO_2排放量比相同O_2浓度的空气气氛下低;随着O_2浓度的升高,排放量升高。相同钙硫摩尔比下,O_2/CO_2气氛下石灰石的脱硫机理以直接脱硫为主,脱硫效率比空气气氛下高;随着O_2浓度的增加,石灰石脱硫效率提高。The SO2 emission and limestone desulfurization characteristics were studied in a 50 kW circulating fluidized bed combustor under O2/CO2 atmosphere. Results show that without limestone addition, SO2 emission in 21%O2/79%CO2 atmosphere is lower than that in air atmosphere. As O2 concentration increases in O2/CO2 atmosphere, SO2 emission increases. With the same Ca/S molar ratio, direct sulfation is the dominant desulfurization mechanism in O2/CO2 atmosphere and the desulfurization efficiency is higher than that in air atmosphere. As O2 concentration increases, the desulfurization efficiency increases in O2/CO2 atmosphere.

关 键 词：循环流化床 O2/CO2燃烧 SO2排放 脱硫效率 

分 类 号：TK6[动力工程及工程热物理—生物能]