循环流化床锅炉燃煤电厂微量元素的排放特征  

Trace Elements’ Emission Characteristics in Circulating Fluidized Bed Boiler Coal-fired Plant

作　　者：毛锦玉 倪秀峰 薛超 谢利晋 笪春年[1,3] 王儒威 MAO Jin-yu;NI Xiu-feng;XUE Chao;XIE Li-jin;DA Chun-nian;WANG Ru-wei(School of Biological,Food&Environment,Hefei University,Hefei 230601;School of Resources and Environment,Hefei University of Technology,Hefei 230009;China Energy Engineering Group,Anhui Power Design Institute Co.Ltd,Hefei 230005;Guangdong Key Laboratory of Environmental Pollution and Health,Jinan University,Guangzhou 511443,China)

机构地区：[1]合肥学院,生物食品与环境学院,合肥230601 [2]合肥工业大学,资源与环境工程学院,合肥230009 [3]中国能源建设集团,安徽省电力设计院有限公司,合肥230005 [4]暨南大学,广东省环境污染与健康重点实验室,广州511443

出　　处：《合肥学院学报（综合版）》2021年第2期70-77,共8页Journal of Hefei University：Comprehensive ED

基　　金：安徽省博士后基金资助项目(2019B332);国家重点研发计划(2016YFC0201600)资助。

摘　　要：利用质量平衡法和富集因子法研究循环流化床锅炉燃煤电厂有害微量元素的再污染、转变机理和污染物对环境的再释放等排放特征。结果表明:由相对富集系数值,可对七种有害微量元素进行初步分类;在燃煤电厂的循环流化床锅炉燃烧过程中,有害微量元素分配行为受元素的赋存状态、燃烧温度等影响,以及在燃烧后飞灰中易溶组分增加;在燃烧区亚微米灰中挥发分有害微量元素蒸发后,可以捕捉到非均匀冷凝或吸附在破碎的细颗粒表面痕量的挥发分。In this study,we measured the re-pollution,transformation mechanism and re-emission of pollutants to the environment of harmful trace elements in circulating fluidized bed boiler coal-fired power plants by mass balance method and enrichment factor method.The results showed that seven harmful trace elements can be classified based on relative enrichment coefficient value.The harmful trace elements are affected by the presence of elements,combustion temperature after burning during the combustion process of a circulating fluidized bed boiled in a coal-fired power plant.With the harmful trace elements in the submicron ash of burning zone evaporation,the trace volatilization by nonuniform condensed or adsorbed on the surface of broken fine particeles can be captured.

关 键 词：循环流化床锅炉 微量元素 燃烧灰 亚微米颗粒 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]