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Study on the Back-blowing Performance of Micro/Nano-fiber Composite Filter Paper
Received:November 18, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2023.03.009
Key Words:air filtration  composite filter paper  back-blowing performance  micro/nano-fiber
Fund Project:中央高校基本科研业务费专项资金资助。
Author NameAffiliationPostcode
LIU Sihan* School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
LIANG Yun School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
RAN Chao School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
YU Tian Guangxi Huayuan Filtration System Co.， Ltd.， Yulin， Guangxi Zhuang Autonomous Region， 537005 537005
TANG Min School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
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Abstract:The back-blowing performance of three kinds of micro/nano fiber composite filter paper at different surface flow rate and dust generation concentrations were investigated in this paper， and properties of the wet fiber composite filter paper， meltblown fiber composite filter paper and electrostatic spinning fiber composite filter paper with similar initial filter efficiency were mainly compared. The results showed that at a surface flow rate of 11.1 cm/s and a dust generation concentration of 1 g/m3， under the condition without back-blowing， the primary dust holding capacity of the wet fiber composite filter paper， the meltblown fiber composite filter paper and the electrostatic spinning fiber composite filter paper were 85.3，84.8， and 64.1 g/m2， respectively. However the electrostatic spinning fiber composite filter paper with poor dust holding performance had excellent back- blowing performance. It took about 3700 s to complete 30 times of back-blowing， which was 13.8 times of a dust holding test time， with the final resistance of 554 Pa. The back-blowing time of wet fiber composite filter paper and meltblown fiber composite filter paper were 2587 and 2527 s， respectively， significantly lower than the electrostatic spinning fiber composite filter paper， with the final resistance of 854 and 724 Pa. With the increase of the surface flow rate from 11.1 cm/s to 19.4 cm/s， or the increase of the dust concentration from 1 g/m3 to 4 g/m3， the back-blowing time of the filter media decreased sharply.
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