高电压技术2017，Vol.43Issue(6)：1759-1765,7.DOI:10.13336/j.1003-6520.hve.20170527002
负直流电晕诱发低压电极多孔绝缘层微放电的参数优化
Optimization of Microdischarge Parameters of Porous Insulating Layer on Low-voltage Electrode Induced by Negative DC Corona
摘要
Abstract
In order to improve the intensity of plasma and the degradation efficiency of VOCs,the line-plate discharge device was used,and the porous insulating materials were attached to the low-voltage electrode,using the negative DC corona discharge to induce the surface microdischarge in the pore of insulating material on the low-voltage electrode.The effects of different insulating materials,film thickness(d),number of pores(n) and pore size(s) on the discharge characteristic and the formation of ozone were investigated to optimize the experimental parameters of the microdischarge induced by DC corona discharge system.The experimental results show that adhesion of porous insulating materials on low-voltage electrode can efficiently improve the plasma intensity compared with the uncovered electrode,among the studied materials,the porous polytetrafluoroethylene(PTFE) showed the best improvement.Increasing the nttrnber of holes in the insulating layer,decreasing the film thickness and the pore diameter can significantly enhance the discharge plasma intensity.Under the conditions of d=50 μm,n=50,s=10 μm,when the voltage is 12 kV,the discharge current is 1 296 μA,and the ozone concentration is 3.11 mg/L,which is 4.5 times and 2.2 times higher,respectively,than that of the uncovered low-voltage electrode.The microdischarge in porous PTFE on low-voltage electrode can effectively improve the degradation rate of toluene.When the voltage is 13 kV the degradation efficiency of toluene reached 58％,increased 31％ compared with that of uncovered electrode.关键词
低压电极/多孔绝缘/微放电/放电伏安特性/臭氧浓度Key words
low-voltage electrode/porous insulating film/microdischarge/discharge U-I characteristic/ozone concentration引用本文复制引用
李杰,关银霞,姜楠,姚晓妹,王世强,刘全桢..负直流电晕诱发低压电极多孔绝缘层微放电的参数优化[J].高电压技术,2017,43(6):1759-1765,7.基金项目
国家自然科学基金(51477025).Project supported by National Natural Science Foundation of China (51477025). （51477025）
