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浙江大学学报(工学版)
能源与环境工程     
模拟垃圾焚烧过程中氯对铅动态挥发特性的影响
张帅毅,黄亚继,王昕晔,严玉朋,刘长奇,陈波
东南大学 能源热转换及其过程测控教育部重点实验室,江苏 南京 210096
Effect of chlorides on plumbum dynamic volatilization during simulated municipal solid waste incineration
ZHANG Shuai yi,HUANG Ya ji,WANG Xin ye,YAN Yu peng,LIU Chang qi,CHEN Bo
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
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摘要:

使用管式炉模拟炉排炉内垃圾焚烧过程,收集连续变化时段内的飞灰并对其进行分析,研究垃圾中有机氯(PVC)和无机氯(NaCl)对铅(Pb)动态挥发特性的影响.在从室温(25 ℃)至900 ℃的焚烧过程中,PVC对Pb挥发的促进作用略强于NaCl,但是两者发生作用的温区完全不同.PVC的作用温度低于500 ℃,而NaCl的作用温度为800~900 ℃.进一步的机理研究表明:PVC通过间接氯化促进Pb挥发,NaCl则通过直接氯化促进Pb挥发.PVC在200~300 ℃开始释放HCl,通过HCl将高熔点的PbO氯化为低熔点的PbCl2,从而导致Pb挥发温度提前到500~600 ℃.NaCl在焚烧过程中不释放含氯气体,而是在800~900 ℃下直接与SiO2、Al2O3和PbO反应生成PbCl2,从而促进Pb的挥发.

Abstract:

The incineration process in grate furnace was simulated by the waste combustion in a tube furnace. The effect of organic chlorine (PVC) and inorganic chlorine (NaCl) on the dynamic volatilization characteristic of Pb were investigated according to the continuous collection of fly ash during incineration from room temperature (25  ℃) to 900 ℃. The organic chlorine had more significant impact on Pb volatilization than inorganic chlorine. But the temperature zones where they worked were totally different. The effective temperature of PVC was under 500 ℃, but the effective temperature of NaCl was between 800 ℃ and 900 ℃. The further mechanism study indicates that PVC promotes Pb volatilization by indirect chlorination, while NaCl promotes Pb volatilization by direct chlorination. PVC begins to release HCl at the temperature of 200 ℃ to 300 ℃ and transfer chlorinate PbO to PbCl2 during the incineration process, leading to the volatilization temperature of Pb at 500 ℃ to 600 ℃. During the incineration process, NaCl does not release chloride gas, but chlorinate PbO at the temperatnre of  800 ℃ to 900 ℃ with the combination of SiO2 and Al2O3 to promote the volatilization of Pb.

出版日期: 2016-09-18
:  X 705  
基金资助:

国家自然科学基金资助项目(51476031);高等学校博士学科点专项科研基金资助项目(20130092110007).

通讯作者: 黄亚继,男,教授,博导.ORCID:0000 0002 0176 4358.      E-mail: heyyj@seu.edu.cn
作者简介: 张帅毅(1991-),男,硕士生,从事固体废弃物资源化利用研究.ORCIO:0000 0002 1326 3735.E-mail:shuaiyi_zhang@163.com
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引用本文:

张帅毅,黄亚继,王昕晔,严玉朋,刘长奇,陈波. 模拟垃圾焚烧过程中氯对铅动态挥发特性的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.03.012.

ZHANG Shuai yi,HUANG Ya ji,WANG Xin ye,YAN Yu peng,LIU Chang qi,CHEN Bo. Effect of chlorides on plumbum dynamic volatilization during simulated municipal solid waste incineration. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.03.012.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.03.012        http://www.zjujournals.com/eng/CN/Y2016/V50/I3/485

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