文献类型：期刊文献

中文题名：城市生活垃圾焚烧过程中铅的迁移特性探究

英文题名：Partitioning of Pb during Municipal Solid Waste Incineration

作者：胡济民[1];王瑟澜[2,3];徐浩然[1];吴亭亭[1]

机构：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海200237;[2]上海老港固废综合开发有限公司;[3]上海环境实业有限公司,上海200237

年份：2018

卷号：44

期号：6

起止页码：800

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

语种：中文

中文关键词：垃圾焚烧;管式炉;重金属铅;迁移分布

外文关键词：waste incineration;tube furnace;heavy metal Pb;migration and distribution

摘要：以上海市城市生活垃圾为对象,研究了在垃圾焚烧过程中氯化物、硫化物、氧化物对重金属铅(Pb)迁移分布的影响。使用管式炉模拟垃圾焚烧炉,采用电感耦合等离子体原子发射光谱仪(ICP-AES)测试铅的含量。研究结果表明:在焚烧温度为800℃的氧化气氛下,氯和硫的加入均能促进铅更多地向飞灰中转移,且聚氯乙烯(PVC)对铅的促挥发能力略强于NaCl,不同形态的硫对铅在飞灰中迁移影响由大到小依次为Na_2SO_4,Na_2S,单质硫。SiO_2和CaO对铅均具有捕集效果,且CaO的捕集能力比SiO_2强。
With the acceleration of economic development and urbanization,the rapid generation of millions of tonnes of municipal solid waste has become a global issue.Incineration is an advantageous option for municipal solid waste stabilization due to its potentials for waste reduction and resource utilization compared with other methods of treatment.Incineration inevitably brings the environmental pollution related to heavy metal emission.In this study the effects of chlorides,sulfides and oxides on the migration and distribution of Pb during municipal solid waste incineration were investigated.A tube furnace equipped with an air supply system and an ash collection device were employed to simulate the incinerator.Finally,the content of heavy metal Pb was measured by an induced coupled plasma atomic emission spectrometer(ICP-AES).The results showed that at incineration temperature of800℃,under oxidizing atmosphere,the addition of chlorine-containing substances could promote the transfer of Pb to fly ash.The effects of NaCl and PVC on the distribution of Pb in fly ash were different because the reaction products of NaCl and Pb were different from the reaction products of PVC and Pb.These results showed that NaCl had a slightly stronger effect than PVC on promotion of the volatilization of Pb during incineration.The addition of sulfur-containing chemicals could promote the transfer of Pb to fly ash.The effects of different sulfur-containing chemicals on the distribution of Pb in fly ash were also different.The addition of Na^+facilitated Pb to react with sulfur.It condensed,nucleated and reunited under the driving of airflow,and was captured by the fly ash filtration system,so that more Pb could migrate to the fly ash.The order of the influence of different forms of sulfur-containing chemicals on the migration of Pb in fly ash was Na2SO4>Na2S>S.SiO2and CaO showed adsorption effect on Pb.The chemical reactions between SiO2and Pb produced PbSiO3,which was easily fixed in the bottom ash.CaO also reacted with HCl to generate CaCl2,thereby reducing the production of metal chlorides and reducing the volatilization of heavy metals.Besides,CaO also exhibited physical adsorption capacity toward Pb.The adsorption effect of CaO was stronger than that of SiO2.