燃煤电厂排放细微灰粒中痕量元素的分布与富集规律  

THE DISTRIBUTION AND ENRICHMENT OF TRACE ELEMENTS IN PARTICLES RELEASED FROM COAL COMBUSTION

作　　者：陆晓华[1] 曾汉才[2] 欧阳中华[1] 张保军[3] 魏路线[3] 

机构地区：[1]华中理工大学化学系 [2]华中理工大学媒燃烧国家重点实验室 [3]武汉工学院分析测试中心,武汉430070

出　　处：《环境化学》1995年第6期489-493,共5页Environmental Chemistry

基　　金：国家攀登计划(课题编号85-25-O6-3-3);华中理工大学环境科学基金资助课题

摘　　要：本文测定了武汉市青山热电厂５＾＃锅炉在两种不同燃烧工况条件下，除尘器入口烟道灰的四种不同粒径灰粒中的Ｃｕ，Ｃｏ，Ｎｉ，Ｐｂ，Ｃｄ，Ｃｒ和Ｂｅ等七种痕量元素的含量。发现大部分元素有在细微粒子中富集的倾向，富集程度与颗粒物粒径大小、元素性质、元素存在形态及燃烧工况条件有密切关系。这种富集倾向可用痕量元素在燃烧过程中的蒸发－凝集作用来解释。. The trace elements Cu,Co,Ni,Pb,Cd,Cr and Be in four different sizes of particles released from coal combustion under two circumstances at Qingshan Heat and Power Plant in Wuhan were determined. The results showed that most of the trace elements had a tendency of enrichment in the small particles of micrometer size. The degree of the enrichment of the trace elements was related to the size of the particles,the property of the elements,the speciation of the trace elements in coal and the circumstance of the coal combustion. This tendency of enrichment of trace elements in small particles can be interpreted reasonably by the vaporization-condensation mechanism in the process of coal combustion.

关 键 词：煤 颗粒物 痕量元素 环境化学 分布 富集规律 

分 类 号：TQ51[化学工程] X131[环境科学与工程—环境科学]