快脉冲放电对粉尘中二噁英的转化作用  

Pulse discharge effect on detoxication of dioxin in fly ash

作　　者：周远翔[1] 孙昌富[1] 严萍[2] 梁曦东[1] 关志成[1] 荷福正治 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]中国科学院电工所,北京100080 [3]日本工业技术院国立资源环境研究所

出　　处：《清华大学学报（自然科学版）》2002年第9期1161-1164,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：用焚烧炉进行城市垃圾焚烧处理后余下的粉尘中含有严重危及人类身体健康 ,甚至生命安全的二英。该文利用表面脉冲放电研究了静电除尘器中粉尘的表面化学转化 ,结果发现放电后的粉尘颗粒表面产生物理性脆性变化。这表明脉冲放电引起粉尘及其颗粒的有效脆性化。含量分析结果也表明放电后试品中对人体有害的二英含量明显降低。正脉冲放电比负脉冲放电对粉尘中的二英有更明显的转化作用。可以认为 ,利用脉冲放电 ,特别是正脉冲放电 ,非热平衡等离子体能有效地解除和转换粉尘中有害化学物质。The powder from city rubbish burning consists of dioxine which is dangerous to human's health and even life. In this paper, fly ash from electrostatic precipitators was detoxified using surface pulse discharges. Powder from the shattered particles was visible after discharging indicating that the pulse discharge effectively caused mechanical fracturing of the fly ash particles. Composition analysis shows that the discharge reduces the amounts of toxic substances and dioxines in the samples. A positive pulse discharge provides more effective detoxication than a negative discharge. The surface pulse discharge, especially the positive pulse discharge, produces a non -thermal plasma which effectively detoxified the dioxine in the fly ash.

关 键 词：快脉冲放电 粉尘 转化作用 二恶英 非热平衡等离子体 有害物质处理 大气污染 表面化学转化 

分 类 号：X513[环境科学与工程—环境工程]