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《Environmental Science & Technology》 2010-05
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Generation Characteristics and Regulatory Control of PM from Layer Burning Boilers Firing Soft Coal

YAO Zhi-mao,ZOU Lan,LI Jun,WANG Zong-shuang (Environmental Standard Institute,Chinese Research Academy of Environmental Science,Beijing 100012,China)  
Influences of boiler output,excess air coefficient,coal ash content on PM initial emission concentration in coal combustion were investigated by statistical analysis using PM field data and coal analysis data from 95 medium and small layer burning boilers firing soft coal with actual capacity of boilers less than 70MW. The emission of PM from coal-fired boilers was analyzed and possibility and feasibility of regulatory control of PM emission of medium and small coal-fired boilers in China were also discussed. Results indicated that PM initial emission concentrations increase slightly with excess air coefficient and coal ash content increasing and are not related with boiler output under the condition of boiler load more than 80%. PM emission concentrations of layer burning boilers firing soft coal in use basically can meet the emission limits prescribed by existing national emission standard. There are 96% of boilers which the dust collection efficiencies of dust catchers installed are more than 80%. Compared with other countries,the regulatory control of PM emitted from medium and small coal-fired boilers in China is at a medium level. Enhancing particulate matter emission limitation for coal-fired boilers at the national level timely is suggested as well.
【Fund】: 第一次全国污染源普查工业污染源产排污系数核算项目——工业锅炉(含生活锅炉)产排污系数核算课题
【CateGory Index】: X513
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