烟煤与污泥混烧过程中重金属As、Zn和Cr的迁移规律和灰渣的浸出特性  

Transferring Law of Heavy Metals As,Zn and Cr and Leaching Characteristic of Ash During the Process of Co-combustion of Bituminous Coal and Sludge

作　　者：葛江[1,2] 郭义杰 吴浪 苏杭[1] 杨剑[1] 张成[2] 陈刚[2] 

机构地区：[1]华中科技大学中欧清洁与再生能源学院,湖北武汉430074 [2]煤燃烧国家重点实验室(华中科技大学),湖北武汉430074 [3]广州市旺隆热电有限公司,广东广州511340

出　　处：《广东电力》2017年第4期37-42,54,共7页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(51006042);广东省省部产学研结合项目(2013B090500008)

摘　　要：将工业污泥和生活污泥与电厂烟煤分别按照不同的比例混烧,取固体残余物为研究对象,分别对重金属元素As、Zn和Cr的迁移规律及浸出特性进行分析。结果表明随着不同种类污泥掺混比的增加,灰渣中As的含量和残留率均有所降低,Zn和Cr在灰渣中的含量和残留率总体上随着污泥掺混比的增加而增加;工业污泥与烟煤混烧灰渣中的As含量和残留率总体上低于生活污泥与烟煤的混烧结果,Cr的混烧结果与之相反;灰渣中As、Zn和Cr的浸出含量和比例均随着掺混比的增加而降低,生活污泥与烟煤混烧后灰渣中的As、Zn和Cr浸出率总体上高于工业污泥和烟煤混烧后的结果;因为污泥成分的差异,电厂烟煤和不同种类污泥的混烧对迁移特性和浸出特性造成不同的影响。Industrial sludges （IS） andmunicipal sewage sludges （SS） weremixed with bituminous ferent proportions for co-combustion, and solid residues were taken for research objects so as to respectively analyze trans-ferring laws and leaching characteristics of heavy metals including as As, Zn and C.. Results indicate that with increase of blending ratio of different kinds of sludges , content and residual rate of As in ash both decreases , while contents and residual rates of Zn and Cr increase as blending ratio of sludges increases. Content and residual rate of As in ash of IS and bituminous coal is totally less than that in ash from co-combustion of municipal combustion results of Cr are on the contrary. Leaching contents and proportions of As , Zn and Cr in ash all decrease with increase of blending ratios , and leaching rates of As , Zn and Cr in ash from municipal SS and bituminous coal are totally higher than those from IS and bituminous coa. Due to differences of sludges ingredients , co-combustion of bituminous coaland different kinds of sludges will cause different influences on transferring laws and leaching characteristid.

关 键 词：污泥 煤 混烧 重金属 迁移规律 浸出特性 

分 类 号：X502[环境科学与工程—环境工程]