Effect of Feed Forms on the Results of Melting of Fly Ash by a DC Plasma Arc Furnace

作     者：陈明周 盂月东 施嘉标 倪国华 江贻满 遇鑫遥 赵鹏 

作者机构：Institute of Plasma PhysicsChinese Academy of Sciences 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2009年第11卷第5期

页      面：592-597页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 

基　　金：supported by the Knowledge Innovation Project in Chinese Academy of Sciences (045CF3A211) 

主　　题：fly ash plasma melting dioxins heavy metal 

摘      要：Fly ash from a municipal solid waste incinerator （MSWI） without preprocessing （original fly ash, OFA） was melted by a direct current （DC） plasma arc furnace to investigate how the feed forms governed the results. Dioxins in flue gas from stack and bag-filter ash （BFA） were detected. The distribution of heavy metals of Pb, Cd, As, and Cr along the flue gas process system was analyzed. Through a comparison of the results for dioxins and heavy metals in this study and previous work, carrying-over of fly ash particles with the flue gas stream can be deduced. Based on the magnetic induction equation and Navier-Stokes equations, a magnetohydrodynamic （MHD） model for the plasma arc was developed to describe the particle-carrying effect. The results indicate that, a. when melted, the feed forms of MSWI fly ash affect the results significantly; b. it is not preferable to melt MSWI fly ash directly, and efforts should be made to limit the mass transfer of OFA from the plasma furnace.