Experimental study on MSW gasification and melting technology

• Published in: Journal of environmental sciences (China) 2007, Vol.19 (11), p.1398-1403
• Main Authors: XIAO, Gang, JIN, Bao-sheng, ZHONG, Zhao-ping, CHI, Yong, NI, Ming-jiang, CEN, Ke-fa, XIAO, Rui, HUANG, Ya-ji, HUANG, He
• Format: Article
• Language: English
• Subjects: Carbon - chemistry; characteristics; Cities; Coal Ash; Dioxins - chemistry; fluidized-bed gasification; Gases - chemistry; Incineration - methods; Metals, Heavy - chemistry; municipal solid waste (MSW); Particulate Matter - chemistry; Refuse Disposal - methods; swirl-melting; Temperature; 固体废物; 城市垃圾; 处理方法; 硫化床气化
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/S1001-0742(07)60228-9

In order to develop municipal solid waste （MSW） gasification and melting technology, two preliminary experiments and a principle integrated experiment were fulfilled respectively. The gasification characteristics of MSW were studied at 500-750℃ when equivalence ratio （ER） was 0.2--0.5 using a fluidized-bed gasifier. When temperature was 550-700℃ and ER was 0.2--0.4, low heat value （LHV） of syngas reaches 4000-12000 kJ/Nm^3. The melting characteristics of fly ash were investigated at 1100-1460℃ using a fixed-bed furnace. It was proved that over 99.9% of dioxins could be decomposed and most heavy-metals could be solidified when temperature was 1100-1300℃. The principle integrated experiment was carried out in a fluidized-bed gasification and swirl-melting system. MSW was gasified etticiently at 550-650℃, swirl-melting furnace maintains at 1200-1300℃ stably and over 95% of fly ash could be caught by the swirl-melting furnace. The results provided much practical experience and basic data to develop MSW gasification and melting technology.