关键词: PVC, 流化床, 气化, 固体废弃物, 二噁英

Abstract: The generation of dioxin during recycling of solid waste is widely concerned. An experimental research on gasification of simulation garbage containing-high-PVC was carried out on a special designed integrated experimental platform for fluidized-bed gasification. The effects of PVC content and equivalent air ratio (ER) on feature of dioxins generation were discussed. The results show that when PVC content is 20% and ER decreases from 1.2 to 0.4, the yield and TEQ of dioxin produced per gram of PVC are decreased from 146.53 ng·g^-1 and 20.71 ng I-TEQ·g^-1 to 2.07 ng·g^-1 and 0.31 ng I-TEQ·g^-1, respectively. For the same ER 0.4 and PVC decreased from 20% to 1%, the yield and TEQ of dioxin produced per gram of PVC reduced from 23.54 ng·g^-1 and 3.49 ng I-TEQ·g^-1 to 2.07 ng·g^-1 and 0.31 ng I-TEQ·g^-1. That means that the risk of dioxin generation in gasification of the solid waste increases with PVC content, while low-air equivalent factor can suppress its generation.

Key words: PVC, fluidized-bed, gasification, solid waste, dioxin