LC添加剂对垃圾焚烧飞灰熔融过程重金属迁移特性的影响  

Influence of Liquid Ceramic Additive on Binding of Heavy Metal During the Vitrification of Fly Ash from Municipal Solid Waste Incinerator

作　　者：李润东[1] 聂永丰[1] 李爱民[2] 王雷[2] 池涌[3] 岑可法[3] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]沈阳航空工业学院清洁能源与环境工程研究所,沈阳110034 [3]浙江大学热能工程研究所,杭州310027

出　　处：《环境科学》2004年第5期168-171,共4页Environmental Science

基　　金：国家高技术研究发展计划 ( 863 )项目 ( 2 0 0 2AA64 40 10 ) ;中国博士后科学基金项目 ( 2 0 0 3 0 3 413 2 ) ;沈阳市科技计划项目 ( 10 3 3 0 64 1 0 4)

摘　　要：垃圾焚烧飞灰熔融处理可以实现对重金属污染的有效控制 .通过实验系统研究了熔融处理过程液体陶瓷添加剂对重金属迁移特性的影响 .研究表明 1 4 0 0℃时加入液体陶瓷可以显著增加Cr、Pb和Zn的固化率 ,但却使Cd和Cu的固化率降低 .当添加剂小于 1 0 %时Ni的固化率几乎不受影响 .加入 1 0 %LC的结果表明 ,Cr、Zn的挥发主要在 6 1min后进行 ;随着温度升高 ,Cr的固化率逐渐降低 ,其它金属变化不显著 .结果表明LC添加剂对熔融过程重金属固化影响显著 ,而且LC对各种重金属的影响具有选择性 ,为了实现重金属良好固化 ,LC添加比例要适量 ,而且熔融时间不宜超过 33min .Vitrification process can effectively control the leachability of heavy metals in fly ash generated from municipal solid waste incinerator(MWSI).The use of liquid ceramic(LC) additive as a heavy metal chemical stabilization agent was evaluated for MSWI fly ash.The residuals of chromium,lead and zinc in slag increase by different degree with liquid ceramic additive at 1400℃,while those of cadmium and copper decreases.The migrating characteristic of nickel is hardly affected by the additive less than 10%.The volatilization of Cr and Zn occurs after 61 minute with 10% addition of LC,and the binding efficiency of Cr decreases with increasing of melting temperature.The results indicate that the binding efficiency of heavy metals was affected greatly by LC additive and showed significant differences according to type of heavy metal during melting process. The short melting time(no longer than 33min)is useful to obtain high binding efficiency of heavy metals.

关 键 词：垃圾焚烧飞灰 熔融 重金属 迁移 

分 类 号：X705[环境科学与工程—环境工程]