Experimental Research On Gasification Characteristics Of Filtrated MSW In Fluidized Beds

The treatment of Municipal Solid Waste (MSW) has become one of the serious worldwide issues. Until now, people have developed several MSW treatment technologies which have their own disadvantages. Especially, the problem of the release of toxic substances such as heavy metals and dioxins in incineration has aroused the high attention of western developed countries. MSW Gasification and melting is a novel technology of waste treatment. It combines the advantages of MSW gasification and fly ash melting. So in the past few years, MSW gasification and melting technology has been widely used in Japan, America and other western developed countries, and it has been regarded as the most promising MSW processing method. In China, MSW gasification and melting is just in its preliminary stage and little work has been done in this field. So it is very important and necessary to develop gasification and melting technology that is fit for Chinese MSW.After analyzing the physical and chemical characteristics of Chinese MSW, this paper brings forward a novel gasification and melting technology which is fit for Chinese MSW-- The filtrated MSW gasification and melting system based on integrated disposal of MSW.Gasification characteristics of typical components (waste tire, waste paper, waste fabric, wood and waste plastic) in filtrated MSW were studied in a fluidized bed, which was designed and developed at the laboratory scale. The gasification efficiency, carbon conversion efficiency, heating value, yield and components of syngas were analyzed. The Pyrolysis of waste paper and waste fabric were carried out in the fluidized bed. The pyrolysis products were analyzed.Gasification characteristics of dried MSW were studied in the fluidized bed. Results showed that the optimum operation conditions were achieved when the gasification temperature was 600℃ and the excessive air radio was 0.4. A gaseous product, mainly containing CH4, CO, H₂, C₂H₆, and longer-chain hydrocarbon with a lower heating value of about 3867kJ/Nm³, can be generated at the highest energy transformation efficiency of 85.5% under the optimum operation conditions achieved in this study.