Experimental and numerical study of a gas cyclone with a central filter--颗粒学报PARTICUOLOGY

Zhang, Z., Dong, S., Dong, K., Hou, L. a., Wang, W., Wei, Y., & Wang, B. (2022). Experimental and numerical study of a gas cyclone with a central filter. Particuology, 63, 47-59. https://doi.org/10.1016/j.partic.2021.04.014

Experimental and numerical study of a gas cyclone with a central filter

Zihui Zhang ^a, Sijie Dong ^a, Kejun Dong ^b, Li’an Hou ^c, Wenzheng Wang ^d, Yi Wei ^a *, Bo Wang ^a *

a Key Laboratory of Western China’s Environmental Systems (Ministry of Education) and Engineering Research Center of Fine Particles Pollution Control Technology and Equipment of Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
b Centre for Infrastructure Engineering, School of Engineering, Western Sydney University, Penrith, NSW 2751, Australia
c Xi’an High-Tech Institute, Xi’an 710025, China
d Gansu Chemical Industry Research Institute Co., Ltd, Lanzhou 730000, China

10.1016/j.partic.2021.04.014

Volume 63, April 2022, Pages 47-59

Received 7 January 2021, Revised 3 April 2021, Accepted 26 April 2021, Available online 10 May 2021, Version of Record 18 November 2021.

E-mail: weiyi@lzu.edu.cn; wangbo@lzu.edu.cn

Highlights

• Performance of a novel gas cyclone with a cylindrical filter face was studied.

• Mechanisms for the improvement of the performance were analyzed.

• Comparison of fluid flow fields between two cyclones was performed.

Abstract

This paper studies a novel gas cyclone with a cylindrical filter face installed in the center from the vortex finder to the bottom hopper. The experimental results show that this composite cyclone has a higher collection efficiency and a lower pressure drop than the original cyclone. The mechanisms for the improvement are analyzed by both physical experiments and numerical simulations. By measuring dust samples collected at different places it is revealed that the center filter can prevent fine particles from entering the inner vortex and escaping, which accounts for the increase of the collection efficiency. In addition, the flow field of the composite cyclone is simulated by computational fluid dynamics and compared with that of the original cyclone. The analysis shows that with the filter layer installed, the swirling flow disappears in the vortex finder, which decreases the kinetic energy dissipation and hence lowers the pressure drop.

Graphical abstract

Keywords

Cyclone; Filtration; Porous media model; Collection efficiency; Pressure drop

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