摘要
通过多针电晕放电的方法对5种典型针刺毡滤料驻极,确定了最佳驻极滤料和驻极参数,研究了驻极滤料的过滤性能与稳定性.结果表明:5种滤料驻极后效率均有不同程度提升,其中聚四氟乙烯(PTFE)覆膜针刺毡提升幅度最大且衰减最小;经15 k V驻极电压、2 cm极间距离、20 min驻极时间处理的PTFE覆膜针刺毡1个月后电荷保持率为62. 22%,对1μm以下粒子过滤效率的降低幅度≤0. 9%.经200℃高温处理后,PTFE覆膜滤料电荷平均保持率为56. 15%,对1μm以下粒子过滤效率的降低幅度≤1. 23%;因此,驻极对PTFE覆膜针刺毡有明显的强化效果.
5 typical needle felts were treated by multiple needle corona discharge to study the optimal electret filter,charge parameters and the performances of electret filter such as particle capture efficiency and charge stability.The results showed that the efficiency of all types of filters were improved in different extent:the increase of filtration efficiency of the polytetrafluoroethylene(PTFE)membrane filter is the largest with the smallest attenuation.The charge reservation percentage after a month of the PTFE filter treated under the condition of 15 kV of charging voltage,2 cm of electrode distance and 20 min of charge time is 62.22%with less than 0.9%of filter efficiency reduction for particles smaller than 1μm.After heat treatment of 200℃,the average charge reservation percentage of PTFE is 56.15%,and the efficiency reduction for particles smaller than 1μm is less than 1.23%.The charge technology has a prominent enhancement effect for PTFE membrane filter.
作者
赫伟东
郭颖赫
常德强
柳静献
HE Wei-dong;GUO Ying-he;CHANG De-qiang;LIU Jing-xian(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第10期1469-1473,1479,共6页
Journal of Northeastern University(Natural Science)
基金
"十三五"国家科技重大专项(2016YFC0801704
2016YFC0203701
2016YFC0801605)
"十二五"国家科技支撑计划项目(2015BAK40B00)
关键词
驻极体滤料
电晕放电
稳定性
微细颗粒
过滤效率
electret filter
corona disc charging
stability
fine particle
filtration efficiency
