75t/h燃煤锅炉汞迁移转化规律研究  

STUDY ON MERCURY EMISSIONS FROM 75 t/h COAL-FIRED BOILERS

作　　者：王红梅[1] 岳涛[2] 王相凤[1] 左朋莱[2] 刘宇[1] 佟莉[2] 王洪昌[1] 田刚[1] 张凡[1] 王凡[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]北京市劳动保护科学研究所,北京100054

出　　处：《环境工程》2017年第5期93-97,共5页Environmental Engineering

基　　金：国家新技术发展规划(863计划)课题(2012AA06A113);环保公益性行业科研专项项目(201009048,201309018)

摘　　要：通过对2台75 t/h循环流化床锅炉烟气中汞排放浓度、燃煤和其他固体副产物中的汞含量进行测试,分析了燃煤大气汞的排放因子,并建立了燃煤汞的质量平衡。结果表明:燃煤锅炉中,大部分汞主要存在于烟气和脱硫副产物中,燃烧后进入炉渣、飞灰中的汞含量较少,低于5%。燃煤汞排放去向与脱硫除尘控制技术有关,不同控制技术协同除汞的效果差异较大,而单质汞是燃煤锅炉汞污染防治的重点和难点。By measuring the mercury content in the flue gas, coal and other by-products of two 75 t/h circulating fluidized bed boilers, mercury emission influencing factors of coal-fueled boilers were obtained, and the mercury quantity balance was established. The results indicated that 95% above of mercury existed in flue gas and desulphurization by-products for the coal- fired boiler. Mercury existed in the cinder and fly ash normally accounting for less than 5% of the total amount. Sink of mercury emitted from coal-fired boilers, and its removal efficiency depended on the different combined desulfurization and dust control technologies. Elemental mercury was key and difficult point in developing mercury controlling technology.

关 键 词：燃煤锅炉 汞排放 富集因子 物料衡算 

分 类 号：X77[环境科学与工程—环境工程]