Filtration characteristics of granular bed with layered drawers for removing dust from gas streams--颗粒学报PARTICUOLOGY

Yin, S., Wang, X., Guo, Y., & Wang, L. (2021). Filtration characteristics of granular bed with layered drawers for removing dust from gas streams. Particuology, 55, 191-198. https://doi.org/10.1016/j.partic.2020.06.005

Filtration characteristics of granular bed with layered drawers for removing dust from gas streams

Shaowu Yin^{a b *}, Xu Wang ^a, Yanping Guo ^a, Li Wang ^{a b}

a School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
b Beijing Key Laboratory of Energy Conservation and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China

10.1016/j.partic.2020.06.005

Volume 55, April 2021, Pages 191-198

Received 25 June 2019, Revised 3 June 2020, Accepted 23 June 2020, Available online 23 July 2020, Version of Record 3 February 2021.

E-mail: yinsw@ustb.edu.cn

Highlights

• The layered drawer granular bed with two-component provided a way.

• Coarse particles are on the top and fine particles are on the bottom.

• Different particle size of collector has influence on dust removal effect.

• The filter cake formed on the surface of coarse particle surface.

Abstract

Filtration tests were conducted on a granular bed filter with layered drawers filled with corundum particles with sizes between either 1 mm and 1.5 mm or 2 mm and 3 mm or with quartz sand particles with sizes between 0.125 mm and 1.5 mm. Filtration velocity, filter particle thickness, and filter particle size were all found to influence the filtration efficiency and the pressure drop of both the fixed granular bed and the layered-drawer granular bed. Granular strata with different thickness ratios also strongly influenced the filtration efficiency and pressure drop. For a granular bed with two sizes of filter particles, the coarse granules in the upper layer capture dust with large particle sizes, while the fine granules in the lower layer capture dust with smaller particle sizes that passes through the filter cake and upper layer. Optimal operating conditions were determined at which the filtration efficiency was found to be 99.42% with a bed pressure drop of 320 Pa.

Graphical abstract

Keywords

Fixed granular bed; Filtration efficiency; Pressure drop; Two-component filtering particles

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