模拟垃圾流化床气化特性的实验研究

Experimental Study on Fluidized-bed Gasification of Simulated MSW

利用自行设计建造的处理量为2．5t／d大型流化床气化实验平台，在反应温度为550—750℃、空气系数0．4的工况下，对模拟垃圾（municipal solid waste，MSW）进行了气化试验研究，讨论反应产物特性随反应温度的变化规律。结果表明，对于模拟垃圾，在反应温度为650℃，空气系数0．4时能自稳定反应，气化气的可燃成分随温度上升而升高，750℃时气化气的热值达6．9MJ／m3，能量转化率63．5％；含碳飞灰的产率占反应物料的10％左右，在1200℃即可以达到完全熔融，其自身热值15-29MJ／kg。可凝物的产率占到了反应物料的30％-50％，可凝物中水分含量65％-93．5％。

Experimental study on fluidized-bed gasification of simulated municipal solid waste was carried out at a larger scaled experimental rig, with the capacity of 2.5 t/d. The experimental condition of reaction temperature range was 550 ℃ to 750 ℃ and the air ratio was 0.4. The influence of temperature on the composition of syngas is obviously, with the temperature risen the content of combustible component increased as well as the energy conversion rate. The experimental results show that for this simulate MSW, the reaction could get a self-stabilization when the temperature is 650 ℃ and the air ratio is 0.4. As the temperature is 750 ℃, the high heat value（HHv） of syngas reach 6.9 MJ/m3 and the energy conversion rate reach 63.5%. The yield of fly ash is about 0.1 while the yield of condensable products is about 0.3,-0.5. The melting point FT of fly ash is about 1 200-1 250 ℃ and the HHv of fly ash is 15-29 MJ/kg. The water content of condensable products is 65%-93.5%.