烟气汞形态分布及其受氯化物添加剂影响的研究  

Mercury Speciation Distribution in Flue Gas and the Influence of Chloride Additive on It

作　　者：吴江[1] 潘卫国[1] 任建兴[1] 何平[1] 王文欢[1] 沈敏强[1] 冷雪峰[1] 杜玉颖[1] 金云[1] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090

出　　处：《动力工程》2009年第4期405-408,共4页Power Engineering

基　　金：国家自然科学基金资助项目(50806041);上海市浦江人才计划资助项目(07PJ14045);上海市教委科研创新重点资助项目(09ZZ184);上海市启明星跟踪资助项目(07QH14007);上海电力学院人才引进资助项目;上海高校本科高地建设资助项目

摘　　要：在自行设计的一维煤粉燃烧试验台上,研究了烟气汞形态的分布特征,并分析了NaCl作为添加剂与煤混烧对汞形态分布的影响.结果表明:在试验煤种烟气中,气态汞是烟气汞最主要的排放形式,二价汞是气态汞的主要形式,飞灰中的汞含量比底渣中的汞含量高;NaCl的添加使气态二价汞和单质汞占总汞的百分比都有不同程度的下降,而颗粒态汞的比例相应增加,但随着NaCl添加量的增加,颗粒态汞的增加量逐渐趋于平缓,单质汞的减少量也相应降低,趋势趋于平缓.Mercury speciation distribution features in flue gas were studied on an self-designed one- dimensional pulverized coal combustion test rig. And the influence of NaCl, being used as an additive into the coal combustion, on the mercury speciation distribution was analyzed. Results show that the gaseous state of mercury is of the overwhelming content in the emitted mercury for the test coal, and the bivalent mercury is of the major part in the gaseous mercury. In addition, the mercury content in fly ash is higher than that in slag. Adding NaCl causes a certain reduction of percentage of both gaseous bivalent and elemental mercury in the total content, but an increment of ratio of particle mercury. However, with increased addition of NaCl, the particle mercury increases smoothly and the elemental mercury reduces also slowly.

关 键 词：烟气汞 氯化物 添加剂 汞形态分布 减排 

分 类 号：X701[环境科学与工程—环境工程]