Reduction of submicron-sized aerosols emission in electrostatic precipitation by electrical attraction with micron-sized aerosols

Hyun Sik Choi, Jungho Hwang

Research output: Contribution to journalArticlepeer-review

Abstract

Submicron particles suspended in gas can cause serious harm to humans and the environment. One effective method to remove the submicron-sized particles is electrical agglomeration in an alternating current (AC) electric field before the particles are collected in the ESP. In this study, NaCl and Arizona test dust 4 particles laden in an ambient air flow were bipolarly charged in a corona charger, entered a agglomerator, and were collected in a plate-to-plate-type ESP. When an alternating current (AC; 40 kV, 60 Hz) was applied to the agglomerator, the mass concentration of the NaCl particles decreased by 25–27% owing to their attachment to the A4 particles. This decrease was in good agreement with the one theoretically obtained from an agglomeration model considering the wall loss in the agglomerator. When a DC of −4 kV was applied to the ESP, the collection efficiency improved from 55 to 88% for the NaCl particles.

Original languageEnglish
Pages (from-to)882-889
Number of pages8
JournalPowder Technology
Volume377
DOIs
Publication statusPublished - 2021 Jan 2

Bibliographical note

Funding Information:
This work was supported by a grant from the Subway Fine Dust Reduction Technology Development Project of the Ministry of Land Infrastructure and Transport ( 20QPPW-B152306-02 ).

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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