造纸污泥与煤混烧过程中污染物的迁移特性  

TRANSFORM OF POLLUTANTS IN PROCESS OF CO-COMBUSTION OF PAPERMAKING SLUDGE WITH COAL

作　　者：李梅[1] 王德全[2] 

机构地区：[1]北方民族大学化学与化学工程学院,银川博士副教授750021 [2]宁夏大学土木与水利工程学院,银川博士副教授750021

出　　处：《煤炭转化》2016年第2期86-91,共6页Coal Conversion

基　　金：北方民族大学科学研究项目(2014XBZ08);北方民族大学博士科研启动项目(2015年度)

摘　　要：选择宁夏吴忠某造纸厂污泥为研究对象,将其与宁夏本地煤炭进行混合,用热重-质谱仪分析了室温~1 000℃时,污泥与煤混烧特性及混烧过程中NOx和SOx污染物的排放,并用原子吸收分光光度计和原子荧光光谱仪分别研究了燃烧前后样品中重金属Pb,Cr,Cu,Zn,Ni,Mn,Hg和As的迁移.结果表明,造纸厂污泥与煤混烧后,燃烧特性良好,并且燃烧后的灰渣中重金属含量符合GB 4284-1984,不会对水土造成二次污染;燃烧过程中一部分重金属迁移到烟气中去.因此,应采用吸附及除尘结合的方式对烟气进行处理,避免污泥资源化处理过程中对大气的污染.In this paper, a kind of Ningxia paper making sludge and coal mixture with dif- ferent ratios was investigated. Thermal analysis coupled with mass spectrometry was used for the characterization of samples and identified the volatiles evolved during the heating of the sample up to 1 000 ℃ under combustion condition. The transformation of eight kinds of heavy metals（Pb, Cr, Cu, Zn, Ni, Mn, Hg and As） also investigated by atomic absorption spectrometer and atom- cic fluorescence spectrometer, respectively. The results show that the paper making sludge and coal mixture burning stability, the amount of heavy metals in the ash after burning in line with GB 4284--1984, will not cause secondary pollution to soil and water conservation. Part of heavy metals migrate in the flue gas during combustion, therefore should adopt the way of adsorption and dust removal combination to deal with flue gas, avoid atmospheric pollution during the recy- cling of the sludge.

关 键 词：造纸污泥 燃烧 热重分析 重金属迁移 

分 类 号：TQ536[化学工程—煤化学工程] X793[环境科学与工程—环境工程]