固态废弃物和煤混合燃烧过程中有机氯化物形成机理的研究

对几种煤和城市固体废弃物（MSW）如PVC和纤维素中的主要可燃成分进行了实验研究，热重－质谱－红外（TGA／MS／FTIR）分析以原料和其混合物为对象，收集得到的燃烧特征图显示出不同的热力学行为。结果表明共燃中快速加热比慢速加热形成有机化合物的可能性要大，管式炉中的实验表明在MSW燃烧过程中Cl2是生成有机氯化物的重要媒介，提出的形成机理包括Deacon反应，用纯有机化合物进行的实验证实此反应为一可能的途径。燃烧过程中SO2对Cl2生成的作用也被检查，结果表明SO2的加入可以降低Cl2的生成量，从而大大减少有机氯化物的生成。

STUDY ON MECHANISM FOR FORMATION OF CHLORINATED ORGANIC DURING COMBUSTION OF MSW AND COAL

Several kinds of coals and the major combustible components in MSW, such as PVC and cellulose were tested in this paper. TGA/MS/FTIR analyses performed on the raw materials and their blends, and the combustion profiles collected showed various types of thermal behavior. The results indicated greater possibilities for the formation of organic compounds at fast heating rates than slow heating rates during co-firing. Experiments in a tube furnace showed that molecular chlorine is a key intermediate for the formation of chlorinated organic compounds including the Deacon reaction. Experiments conducted using pure organic compounds verified this reaction as a posible pathway. The effect of sulfur dioxide on the formation of molecular chlorine during combustion processes was examined. The results indicate that the introduction of SO 2 does minimize the formation of molecular chlorine and subsequently chlorinated organic compounds.