摘要
采用Ontario—Hydro method（OHM）、汞连续测量仪（Hg—SCEM）和EPA固体吸附剂法（Appendix K）测量了860MW燃煤电站锅炉烟气中汞排放及其形态分布，并基于煤、黄铁矿、底灰、飞灰、脱硫浆液和烟气中的汞含量，分析了汞在燃烧产物中的质量平衡．结果表明：OHM和Hg—SCEM汞测量方法可以用于监测燃煤电站的汞排放，其相对测量偏差小于20％；烟气中总汞的排放浓度随着入炉燃料中汞含量的变化而变化；对于高褐煤掺烧比例的电站锅炉，烟气中元素态汞占总汞比例为48．6％～77．7％，湿法烟气脱硫装置可以脱除90％以上的氧化态汞，电除尘器和湿法烟气脱硫装置的汞脱除效率分别约为15％和34％．
Mercury emission and its speciation from flue gas of a 860 MW pulverized coal-fired boiler were studied respectively by Ontario Hydro method （OHM）, Hg semi-continuous emission monitors （Hg- SCEM） and EPA carbon trap method （Appendix K）. Mercury mass balance was presented based on mercury concentration in coal, pyrite, bottom ash, fly ash, desulphurization slurry and flue gas. Results show that the data obtained by OHM and SCEM are within 4-20% acceptable range, which means the two methods are available to be used for mercury emission monitoring for coal-fired power plants. The total mercury emission fluctuates consistently with mercury content in inlet fuel. The ratios of elemental to total mercury in the flue gas are 48.6%-77.7% for power plants burning coal mixtures containing mainly lignite. Wet flue gas desulfurization （FGD） would capture more than 90% of oxidized mercury, while electrostatic precipitator and wet FGD would respectively remove 15% and 34% of mercury.
出处
《动力工程》
CAS
CSCD
北大核心
2009年第11期1067-1072,共6页
Power Engineering
基金
江苏省自然科学基金资助项目(BK2007532)
江苏省高校基础研究基金资助项目(07KJD610119)
关键词
燃煤锅炉
烟气
汞
形态分布
汞测试方法
coal-fired boiler
flue gas
mercury
speciation distribution
mercury measurement method
作者简介
卢平（1968-），男，江苏南京人，教授，博士，主要从事燃烧及污染物控制方面的教学与研究．电话（Tel．）：13705158126;E-mail：luping@njnu．edu．cn
