O2／CO2气氛下循环流化床煤燃烧SO2排放

工程热物理学报 , 2012, 33(1): 151-154.

O2／CO2气氛下循环流化床煤燃烧SO2排放

段伦博 ^1, , 周骛 ^2, , 屈成锐 ^3, , 陈晓平 ^4, , 赵长遂 ^5,

1.东南大学能源与环境学院,江苏南京210096

2.东南大学能源与环境学院,江苏南京210096

3.东南大学能源与环境学院,江苏南京210096

4.东南大学能源与环境学院,江苏南京210096

5.东南大学能源与环境学院,江苏南京210096

基金项目: 国家重点基础研究发展计划项目(2011CB707301)

关键词：循环流化床 , O2/CO2燃烧 , SO2排放 , 脱硫效率

SO2 Emission From a Coal-Fired Circulating Fluidized Bed Combustor Under O2/CO2 Atmosphere

Keywords： circulating fluidized bed , O2／CO2 combustion , SO2 emission , desulfurization efficiency

在热输入功率50kW的循环流化床O2／CO2燃烧试验装置上研究燃煤SO2排放特性及石灰石脱硫机理。结果发现，未添加石灰石时，O2／CO2气氛下SO2排放量比相同O2浓度的空气气氛下低；随着O2浓度的升高，排放量升高。相同钙硫摩尔比下，O2／CO2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O2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.

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