燃烧福建无烟煤循环流化床锅炉炉内脱硫对SO_2、NO_x和CO等污染物排放的影响  

Influence of Combustion Desulfurization on SO_2,NO_x,CO Pollutant Emissions of Fujian Anthracite-fired Circulating Fluidized Bed Boiler

作　　者：吴剑恒[1] 

机构地区：[1]福建省石狮热电有限责任公司,石狮362700

出　　处：《工业锅炉》2011年第3期5-10,共6页Industrial Boilers

基　　金：福建省科技计划重点资助项目(2006H0088);福建省高校专项基金资助项目(D054005)

摘　　要：在一台燃烧福建无烟煤75 t/h循环流化床锅炉上进行炉内添加石灰石脱硫的工业热态试验,测试了Ca/S摩尔比变化对燃烧福建无烟煤循环流化床锅炉炉内脱硫效果以及SO2、NOx、CO等污染物排放的影响。试验表明：燃烧福建无烟煤循环流化床锅炉自脱硫效率较高,并且脱硫效率随着Ca/S摩尔比增大而呈＂S＂型曲线变化,在Ca/S摩尔比较低（小于2.02）或较高（大于2.82）时脱硫效率随着Ca/S增加而迅速提高,当Ca/S摩尔比在一定范围内（2.02~2.82）脱硫效率缓慢提高;炉内添加石灰石脱硫对NOx和CO排放的影响不明显,均随着Ca/S摩尔比增加而轻微上升;随Ca/S摩尔比增加,电除尘器进口、出口粉尘浓度同步增长,但除尘效率基本保持不变。In order to test the effects of the variation of Ca/S ratio（in molar） on the CFB boiler＇s desulfurization efficiency and influence to pollutant emissions,an industrial experiment using limestone as desulfurizing agent was conducted on a 75 t/h CFB boiler burning Fujian anthracite.The experiment showed that：（1）The CFB boiler had a high self-desulfurization efficiency.The desulfurization efficiency increased with the rise of Ca/S ratio（in molar）,but it increased slowly when 2.02Ca/S2.82.The variation of the desulfurization efficiency with the Ca/S ratio（in molar） could be described with an ＂S＂ type curve.Undered a definite boiler operation condition,it existed an optimal Ca/S ratio（in molar）.（2）The desulfurization during combustion had no evident effect on the NOx and CO emission of boiler,with the rise of Ca/S ratio（in molar）,the NOx and CO emission increased slightly.（3）With the rise of Ca/S ratio（in molar）,the ESP import and export concentration growed synchronously,but the collection efficiency of ESP remained unchanged.

关 键 词：循环流化床锅炉 福建无烟煤 炉内脱硫 石灰石 

分 类 号：X701.3[环境科学与工程—环境工程]