Citation

Wang K, Gu H, Zhang G, Luo K, Zhang Q, Chen G, Zhan M, Chi Z. J. Hazard. Mater. 2022; 441: e129950.

Copyright

(Copyright © 2022, Elsevier Publishing)

DOI

10.1016/j.jhazmat.2022.129950

PMID

36099742

Abstract

Electric agglomeration technology is effective in removing particulate matter from the environment and has been widely used in the field of dust removal. For the first time, this technology is applied to the field of fire smoke removal at lab scale. By varying applied electric potential and initial concentration of smoke, the removal characteristics and mechanisms during the electric agglomeration process are systematically studied. The results show that when the applied electric potential is higher than 4 kV, the smoke transmittance increases from 4% to 90% in just 10 s, and the threshold for people safe escape can be reached in only 5 s. Three main mechanisms involved in the process of smoke removal using electric agglomeration are proposed. In addition to the conventional Coulomb agglomeration of charged particles, the turbulence-enhanced agglomeration induced by ionic wind and dipole chainization at the grounded plate are also observed. This study demonstrates the feasibility and potential of electric agglomeration technology to remove fire smoke.

Language: en

Keywords

Transmittance; Electric agglomeration technology; Fire smoke; Removal mechanisms