Numerical simulation and experimental study of gas cyclone–liquid jet separator for fine particle separation

doi:10.1016/j.cjche.2021.12.015

Abstract

Abstract: To address the shortcomings of existing particulate matter trapping technology, especially the low separation efficiency of fine particles, herein, a novel gas cyclone–liquid jet separator was developed to research fine particle trapping. First, numerical simulation methods were used to investigate the flow field characteristics and dust removal efficiency of the separator under different working conditions, and to determined suitable experimental conditions for subsequent dust removal experiments. Afterward, the separation efficiency of the separator against five kinds of common particles, including g-C₃N₄, TiO₂, SiC, talc, and SiO₂, was experimentally studied. A maximum separation efficiency of 99.48% was achieved for particles larger than 13.1 μm, and 96.55% efficiency was achieved for particles larger than 2 μm. The best crushing atomization effect was achieved for the separator when u_G was 10 m·s^-1 and u_L was 3 m·s^-1, while the best separation effect was achieved when u_G was 10 m·s^-1 and u_L was 3.75 m·s^-1. Studies have shown that the gas cyclone–liquid jet separator has excellent applicability in the separation of fine particles.

Key words: Gas cyclone–liquid jet, Dust removal, Fine particles, Numerical simulation

摘要： To address the shortcomings of existing particulate matter trapping technology, especially the low separation efficiency of fine particles, herein, a novel gas cyclone–liquid jet separator was developed to research fine particle trapping. First, numerical simulation methods were used to investigate the flow field characteristics and dust removal efficiency of the separator under different working conditions, and to determined suitable experimental conditions for subsequent dust removal experiments. Afterward, the separation efficiency of the separator against five kinds of common particles, including g-C₃N₄, TiO₂, SiC, talc, and SiO₂, was experimentally studied. A maximum separation efficiency of 99.48% was achieved for particles larger than 13.1 μm, and 96.55% efficiency was achieved for particles larger than 2 μm. The best crushing atomization effect was achieved for the separator when u_G was 10 m·s^-1 and u_L was 3 m·s^-1, while the best separation effect was achieved when u_G was 10 m·s^-1 and u_L was 3.75 m·s^-1. Studies have shown that the gas cyclone–liquid jet separator has excellent applicability in the separation of fine particles.

关键词: Gas cyclone–liquid jet, Dust removal, Fine particles, Numerical simulation

Liwang Wang, Erwen Chen, Liang Ma, Zhanghuang Yang, Zongzhe Li, Weihui Yang, Hualin Wang, Yulong Chang. Numerical simulation and experimental study of gas cyclone–liquid jet separator for fine particle separation[J]. Chinese Journal of Chemical Engineering, 2022, 51(11): 43-52.

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