Research on low emission MSW gasification and melting system  

作　　者：XIAO Gang NI Mingjiang CHI Yong JIN Yuqi ZHANG Jiaquan MIAO Qi CEN Kefa 

机构地区：[1]State Key Laboratory of Clean Energy Utilization,Institute for Thermal Power Engineering,Zhejiang University,Hangzhou 310027,China [2]Key Laboratory on Clean Coal Power Generation and Combustion Technology of MOE,Southeast University,Nanjing 210096,China

出　　处：《Frontiers of Environmental Science & Engineering》2007年第4期498-503,共6页环境科学与工程前沿（英文）

摘　　要：In order to eliminate secondary pollution caused by municipal solid waste(MSW)incineration,a MSW gasification and melting process is proposed.The process is expected to reduce the emission of pollutants,especially heavy-metals and dioxins.In this paper,the combustible components of MSW and simulated MSW were gasified in a lab-scale fluidized bed at 400°C-700°C when the excess air ratio(ER)was between 0.2 and 0.8.The experimental results indicated that the MSW could be gasified effectively in a fluidized bed at approximately 600°C-700°C when excess air ratio was 0.2-0.4.The melting characteristics of two typical fly ash samples from MSW incinerators were investigated.The results indicated that fly ash of pure MSW incineration could be melted at approximately 1,300°C and that of MSW and coal co-combustion could be melted at approximately 1,400°C.When temperature was over 1,100°C,more than 99.9%of the dioxins could be decomposed and most of the heavy-metals could be solidified in the slag.Based on the above experiments,two feasible MSW gasification and mel-ting processes were proposed for low calorific value MSW:(1)sieved MSW gasification and melting system,which was based on an idea of multi-recycle;(2)gasification and melting scheme of MSW adding coal as assistant fuel.

关 键 词：municipal solid waste(MSW) low emission gasification and melting DIOXINS HEAVY-METAL 

分 类 号：X70[环境科学与工程—环境工程]