NO对燃煤烟气中汞形态分布影响的实验研究  

EFFECT OF NO ON THE SPECIATION OF MERCURY IN COALFIRED FLUE GASES

作　　者：高洪亮[1] 周劲松[1] 骆仲泱 午旭杰[1] 胡长兴[1] 倪明江[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用与环境工程教育部重点实验室

出　　处：《工程热物理学报》2004年第6期1057-1060,共4页Journal of Engineering Thermophysics

基　　金：国家高技术研究发展计划项目(No.2001AA529040);国家重点基础研究发展规划项目(No.G1999022212-08)

摘　　要：在小型实验台上研究了NO对汞形态的影响。结果表明:在不含HC1气体的模拟烟气中,加入NO后转化率明显增加;较高浓度的NO会引起汞转化率下降但仍高于无NO的体系;随反应温度的升高汞的转化率逐渐降低;SO2的存在引起汞转化率升高。在含HC1的模拟烟气中,随反应温度的升高汞的转化率升高;SO2的存在引起汞转化率下降;NO的存在会提高汞的转化率。在一般烟气体系中, HC1可以促进汞的氧化;较高的O2浓度也可以促进汞的氧化。A bench-scale experimental is conducted to study effects of NO on the speciation distribution of mercury in coal-fired flue gases. The test method used here for mercury speciation was Ontario Hydro Method. The speciation distribution of mercury in different coal-fired flue gas systems was studied in typical constituent flue gas systems. The conclusions are as follows: In the coal-fired flue gas systems without HC1, the conversion ratio of Hg2+ to total Hg will become lower with reaction temperature becoming higher; O2, NO and SO2 can slightly praise the conversion ratio of Hg2+ to total Hg. In the coal-fired flue gas systems containing HC1, the conversion ratio of Hg2+ to total Hg will become higher at elevated temperature; SO2 can decrease the conversion ratio of Hg2+ to total Hg; HC1, NO, O2 can enhance oxidation of Hg vapor.

关 键 词：一氧化氮 汞 形态 煤 烟气 

分 类 号：TQ534[化学工程—煤化学工程]