东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (10): 1469-1474.DOI: 10.12068/j.issn.1005-3026.2018.10.020

• 资源与土木工程 • 上一篇    下一篇

袋除尘滤料电晕驻极强化研究

赫伟东， 郭颖赫， 常德强， 柳静献   

  1. (东北大学资 源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2017-07-03 修回日期:2017-07-03 出版日期:2018-10-15 发布日期:2018-09-28
  • 通讯作者: 赫伟东
  • 作者简介:赫伟东(1992-)，男，内蒙古赤峰人，东北大学博士研究生； 柳静献(1966-)，男，河北元氏人，东北大学教授，博士生导师.冯明杰(1971-)， 男， 河南禹州人， 东北大学副教授; 王恩刚(1962-)， 男， 辽宁沈阳人， 东北大学教授，博士生导师.
  • 基金资助:
    “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).国家自然科学基金资助项目(51171041).

Enhancement of Baghouse Filter with Corona Electret

HE Wei-dong， GUO Ying-he， CHANG De-qiang， LIU Jing-xian   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2017-07-03 Revised:2017-07-03 Online:2018-10-15 Published:2018-09-28
  • Contact: LIU Jing-xian
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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15kV驻极电压、2cm极间距离、20min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.

关键词: 驻极体滤料, 电晕放电, 稳定性, 微细颗粒, 过滤效率

Abstract: 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 15kV of charging voltage， 2cm of electrode distance and 20min 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.

Key words: electret filter, corona disc charging, stability, fine particle, filtration efficiency

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