无电晕式静电除尘器新型材料电发射特性试验研究  

EXPERIMENTAL RESEARCH ON THE NEW CATHODE IN THE NON-CORONA THERMAL EMISSION PRECIPITATOR AT HIGH TEMPERATURE

作　　者：袁琦[1] 黄亚继[1] 杨亚平[1] 刘俊龙[1] 赵通[1] 王双群[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《环境工程》2013年第S1期329-332,353,共5页Environmental Engineering

摘　　要：在不同的温度和电压条件下,对自行开发的新型阴极分别在不同的介质中进行了静态和动态试验研究。研究发现,阴极的发射电流密度随着温度和电压的升高而增大;高压有利于动态条件下电子发射;在静态实验条件下的发射电流密度要比动态实验条件下大很多,这主要是由于阴极发生中毒以及离子迁移率的减小造成的,烟气中的粉尘也对阴极的电子发射有一定的影响。The thermal emission characteristics of the new cathode in different media are researched at the different temperatures and voltages. The results show that the emission current density of the cathode increases with the increase in temperature and voltage. High voltage helps electron emission in the dynamic test. Because of the decrease of Cathode poisoning and ionic mobility,the emission current density is much larger at the captive test than at the dynamic test. Besides,the dust in the flue gas also has an effect on the emission current density.

关 键 词：温度 电压 阴极 发射电流密度 阴极中毒 离子迁移率 

分 类 号：X701.2[环境科学与工程—环境工程]