循环流化床锅炉燃烧福建无烟煤炉内脱硫对污染物排放的影响  

Influence of Combustion Desulfurization on Pollutant Emissions in Circulating Fluidized Bed Boiler with Burning Fujian Anthracite

作　　者：洪方明[1] 

机构地区：[1]福建省石狮热电有限责任公司,福建石狮362700

出　　处：《电力学报》2011年第3期241-246,共6页Journal of Electric Power

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

摘　　要：在75 t/h循环流化床锅炉内进行了添加石灰石脱硫的工业热态试验,锅炉内燃烧福建无烟煤,并研究了Ca/S摩尔比对锅炉脱硫效果的影响。结果表明：燃烧福建无烟煤,循环流化床锅炉自脱硫效率较高,Ca/S摩尔比对脱硫效率影响较大。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2.02~2.82范围内变化时,脱硫效率缓慢提高。脱硫时添加石灰石对NOx和CO排放影响不明显,但两者排放量均随着Ca/S摩尔比增加而轻微上升。此外,烟尘在电除尘器进口、出口的浓度同步增长,但总体除尘效率基本保持不变。In order to test the effects of Ca/S ratio（in molar） on the CFB boiler＇s desulfurization efficiency,pollutant emissions and efficiency of electrostatic precipitator,an industrial experiment using limestone as desulfurizing agent was conducted on a 75t/h CFB boiler burning Fujian anthracite.The resluts showed that the CFB boiler had high self-desulfurization efficiency.Ca/S molar ratio has the important effect on the desulfurization efficiency.When Ca/S molar ratio was lower than 2.02 or larger than 2.82,the desulfurization efficiency increased clearly.However,when Ca/S molar ratio changed in the range of 2.02-2.82,the desulfurization efficiency increased gently.Adding limestone has no obvious effect on NOx and CO emissions,while NOx and CO emissions increased with increasing Ca/S molar ratio slightly.In addition,inlet smoke concentration increased with outlet smoke concentration in the electrostatic precipitator,while the collection efficiency remained unchanged.

关 键 词：锅炉 循环流化床 福建无烟煤 炉内脱硫 SO2 NOx 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]