氯化氢对燃煤烟气中汞形态分布影响的实验研究  

Effect of hydrogen chloride on speciation distribution of mercury in coal-fired flue gases

作　　者：高洪亮[1] 周劲松[1] 骆仲泱 午旭杰[1] 倪明江[1] 岑可法[2] 

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,浙江杭州310027 [2]浙江大学能源清洁利用与环境工程教育部重点实验室浙江杭州,310027

出　　处：《浙江大学学报（工学版）》2004年第6期765-769,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术研究发展计划资助项目(2001AA529040);国家自然科学基金资助项目(59906010);国家重点基础研究发展规划项目(G1999022212-08).

摘　　要：建造了小型多功能实验台,并用模拟烟气在该实验台上研究了HCl对煤燃烧后烟气中的氧化态Hg和单质态Hg分布比例的影响.采用OntarioHydro方法作为样品取样方法,分别对烟气中有无HCl、(HCl)大小、(O2)大小、反应器出口温度高低以及ρ(Hg)变化对燃煤烟气中Hg形态分布的影响进行了分析.研究表明:在无HCl的烟气体系中,随反应温度的升高Hg的转化率先升高后逐渐降低;在含HCl的烟气体系中,随反应温度的升高汞的转化率随之升高,烟气中(HCl)越大,转化率越大,较高的(O2)可以促进Hg的氧化,高的反应器出口温度会提高Hg的转化率,ρ(Hg)升高Hg转化率下降.该研究结果对于开发燃煤电厂烟气中Hg的控制技术具有重要的参考作用.A bench-scale experiment was conducted to study the effects of HC1 on the mercury speciation distribution in coal-fired flue gases. The Ontario Hydro Method was used to analyze the mercury speciation distribution. The effects of O2, HC1 and temperature at reactor's exit on the mercury speciation distribution in different coal-fired flue gas systems were studied. The conclusions were as follows: In coal-fired flue gas systems without HC1, the conversion ratio of Hg2+ to total Hg decreased with rise of reaction temperature; In the coal-fired flue gas systems containing HCl, the conversion ratio of Hg2+ to total Hg increased with rise of reaction temperature. Higher concentration of O2 could enhance oxidation of Hg, higher temperature at reactor's exit could increase the conversion ratio of Hg2+ to total Hg, The conversion ratio of Hg2+ to total Hg decreased with increase of Hg concentration.

关 键 词：氯化氢 燃煤烟气 汞 形态分布 大气污染 

分 类 号：TK16[动力工程及工程热物理—热能工程] X51[环境科学与工程—环境工程]