水对垃圾焚烧飞灰二噁英从头合成的影响  

EXPERIMENTAL STUDY ON THE ROLE OF MOISTURE IN DE NOVO FORMATION OF PCDD AND PCDF

作　　者：章骥[1] 李晓东[1] 严建华[1] 陈彤[1] 陆胜勇[1] 岑可法[1] 

机构地区：[1]能源清洁利用国家重点实验室浙江大学,浙江杭州310027

出　　处：《工程热物理学报》2006年第z2期191-194,共4页Journal of Engineering Thermophysics

基　　金：浙江省科技项目资助(NO.2004C33064)

摘　　要：采用垃圾焚烧飞灰在小型管式炉上进行了二(口恶)英的从头合成试验,通过控制水分在气流中的比例,研究不同的水分对二(口恶)英的总量,毒性当量以及分布特性的影响。结果表明,水分整体上对二(口恶)英从头合成具有促进作用,并提高了二(口恶)英排放的毒性当量,但没有发现对分布特性有明显的影响。可能的反应途径水分通过活化飞灰的活性位置,从而促进了二(口恶)英的生成。在氮气反应气氛中的试验表明,水分可以为二(口恶)英的生成提供氧。The influence of moisture on the formation of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) was investigated with fly ash from a municipal solid waste incinerator in a fixed bed incinerator in different atmosphere. The total quantity, toxic value and homologue patterns of PCDD/PCDF were examined. The results indicated that the moisture played a positive role in facilitating de novo formation, thus enhanced the total I-TEQ. However, no influence of moisture on the pattern was observed. The potential pathway is that moisture activates the fly ash which can promote the PCDD/PCDF without changing the homologue pattern. The results in nitrogen atmosphere revealed that moisture can provide oxygen for the formation when there is no additional oxygen source.

关 键 词：二(噁)英 水分 从头合成 垃圾焚烧 飞灰 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]