工业污泥焚烧过程中Ca(OH)_2固留重金属研究  

Study on the retention of heavy metals by Ca(OH)_2 in the process of industrial sludge incineration

作　　者：夏志鹏 黄亚继[1] 査健锐 陈浩[1] 秦文慧 曹健华 宋敏[1] XIA Zhipeng;HUANG Yaji;ZHA Jianrui;CHEN Hao;QIN Wenhui;CAO Jianhua;SONG Min(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《中国科技论文》2017年第21期2413-2417,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20130092110007);江苏省环保科研课题(2015013);国家自然科学基金资助项目(51676040)

摘　　要：为了研究Ca(OH)_2对Zn和Pb的固留作用,向将添加Ca(OH)_2的工业污泥在管式炉内进行焚烧,通过原子吸收分光光度计对焚烧后残渣中的重金属元素进行测定和分析。结果表明,在无添加剂的情况下,随着温度的升高,污泥焚烧后残渣中的Zn和Pb的含量先减小,后增加,再减小;Ca(OH)_2对重金属的固留作用有一定的选择性,Ca(OH)_2对污泥焚烧过程中的Zn有一定的固留作用,在Ca(OH)_2添加量为3%时,Ca(OH)_2对Zn的固留作用最佳;但是Ca(OH)_2在污泥焚烧过程中会促进Pb的挥发,随着Ca(OH)_2添加量的增加,对促进Pb挥发的作用越来越明显。The retention effects of Ca(OH)2on Zn and Pb were studied during sludge incineration in tubular furnace.Atomic absorption spectrometer(AAS)was used to detect the distribution of heavy metals in residue.The results show that the contents of Zn and Pb in the residue firstly decrease,then increase and then decrease with the increase of temperature in the absence of additives.Ca(OH)2has a certain retention effect on the Zn in the sludge incineration.When three percent Ca(OH)2is added,the retention of Zn is the most.Ca(OH)2plays a catalytic role in volatilization of Pb.The more Ca(OH)2is added,the less the retention of Pb is.

关 键 词：污泥 焚烧 重金属 温度 添加剂 

分 类 号：X703[环境科学与工程—环境工程]