循环流化床燃煤过程汞控制性能的实验研究  

Experimental Study of Mercury Emission Control Characteristics from Combustion of Coal Blends in Circulating Fluidized Bed

作　　者：高洪亮[1] 杨德红[1] 周劲松[2] 骆仲泱 岑可法[2] 

机构地区：[1]中原工学院能源与环境学院,河南郑州450007 [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：《锅炉技术》2006年第5期28-31,共4页Boiler Technology

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

摘　　要：在热态循环流化床实验台上进行了不同工况燃煤过程汞控制特性的研究,得出如下结论:循环流化床燃煤过程对燃煤中汞的排放具有一定的控制作用;多煤种混烧在汞的控制方面优于单煤种燃烧;煤中掺入石灰石可以有效地减少汞向大气的排放;燃烧的煤种不同,汞的排放特性也不相同。A pilot-scale experimental research is conducted to study the mercury emission control from coal blends combustion and lime stone as one kind of additive into coal in circulating fluidized bed （CFB）. Effects of different conditions on mercury profile in flue gas,bottom ash,fly ash are analyzed. The conclusions are the follows. CFB is efficient to control mercury emission in coal combustion,mercury content in flue gas evidently decreasest different coal blends combustion is superior to pure coal combustion in controlling mercury emission in flue gas; lime stone as one kind of additive into coal is important to minimize mercury content in flue gast in addition,different coal combustion has different mercury controlling efficiency,this is because the constituents of different coals is not the same. The principle of controlling mercury emission of CFB is discussed here,the main reasons include the bed temperature being low,the unburned carbon in fly ash being high, the fly ash concentration in flue gas being high,the quantity of bottom ash being large.

关 键 词：循环流化床 汞 混煤燃烧 控汞机理 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]