Effects of the inlet particle spatial distribution on the performance of a gas-solid cyclone separator--颗粒学报PARTICUOLOGY

Yao, Y., Shang, M., Ke, X., Huang, Z., Zhou, T., & Lyu, J. (2024). Effects of the inlet particle spatial distribution on the performance of a gas-solid cyclone separator. Particuology, 85, 133-145. https://doi.org/10.1016/j.partic.2023.03.024

Effects of the inlet particle spatial distribution on the performance of a gas-solid cyclone separator

Yuge Yao, Manxia Shang, Xiwei Ke, Zhong Huang ^*, Tuo Zhou, Junfu Lyu

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China

10.1016/j.partic.2023.03.024

Volume 85, February 2024, Pages 133-145

Received 2 December 2022, Revised 11 March 2023, Accepted 28 March 2023, Available online 17 April 2023, Version of Record 28 April 2023.

E-mail: huangzhong@mail.tsinghua.edu.cn

Highlights

• The flow field in a gas-solid cyclone was simulated by a four-way coupling method.

• Cyclone performance of various inlet particle spatial distributions was estimated.

• A smaller inlet particle flow area at a lower position is good for separation.

• The inlet vertical particle distribution dominates the separation efficiency.

• The swirling particle ceiling is mainly caused by particles near the inlet roof.

Abstract

The present study was aimed at the inlet particle spatial distribution of a gas-solid separator with high solid loading and investigated its effects on cyclone performance and the inner flow pattern. The flow fields of a cyclone with different rectangular particle flow areas on the inlet surface were numerically simulated using a four-way coupling method. The simulated results indicate that reducing the inlet particle flow area and lowing the inlet particle position can effectively reduce the scattered particles inside the cyclone separator and enhance the separation performance. Vertically gathering the particles to the centerline can also weaken the particle back-mixing. The particles near the roof account for the swirling particle ceiling phenomenon. The inlet particle spatial distribution affects the pressure drop mainly by affecting the gas tangential velocity in the cylinder body. Moreover, compared to the horizontal particle distribution on the inlet surface, the vertical particle distribution has greater effects on cyclone performance.

Graphical abstract

Keywords

Gas-solid cyclone; Inlet particle spatial distribution; Four-way coupling; Separation efficiency; Scattered particle

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