Semi-analytical and computational investigation of different dust loading structures affecting the performance of a fibrous air filter--颗粒学报PARTICUOLOGY

Xu, B., Wu, Y., & Cui, P. (2014). Semi-analytical and computational investigation of different dust loading structures affecting the performance of a fibrous air filter. Particuology, 13, 60–65. https://doi.org/10.1016/j.partic.2013.05.004

Bin Xu ^a b *, Ya Wu ^a, Pengyi Cui ^a

a Department of Environmental Engineering, Tongji University, Shanghai 200092, China
b State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China

10.1016/j.partic.2013.05.004

Volume 13, April 2014, Pages 60-65

Received 4 November 2012, Revised 8 May 2013, Accepted 16 May 2013, Available online 6 August 2013.

E-mail: binxu@tongji.edu.cn

Highlights

• Semi-analytical model of filtration performance for two particle deposit structures was developed.

• Dust loading effect on filtration performance was investigated via CFD simulation.

• Compact deposit structure slightly affected filtration efficiency and pressure drop.

• Dendritic deposit structure significantly affected filtration efficiency and pressure drop.

Abstract

In this study, a semi-analytical model was developed to illustrate the relationship between filtration performance (filtration efficiency and pressure drop) and dust loading under two different particle deposit structures based on theoretical analysis and computational fluid dynamic (CFD) technology. Under the compact deposit structure, within the practical parameter ranges (fiber diameter, air velocity, dust loading mass), a slight efficiency enhancement (∼10%) occurred at the most penetration particle size (MPPS) and pressure drop increased significantly (∼100%) in response to the solidity increase from 5% to 15%. However, under the dendritic particle deposit structure, both filtration efficiency (∼40%) and pressure drop (∼600%) increased significantly with the same solidity increase due to the larger air velocity and swerve change between fibers.

Graphical abstract

Keywords

Particle filtration; Deposition structure; Liquid droplet filtration; Filter dust loading

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