Effects of cone local erosion on the flow field and performance of cyclone separators

被引：0

作者：

Zhang L. ^{[1
]}

Fan J. ^{[1
]}

Gao F. ^{[2
,3
]}

Zhang P. ^{[1
]}

Chen G. ^{[2
,3
]}

机构：

[1] College of Electrochemical Engineering, Qingdao University of Science & Technology, Qingdao

[2] College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao

[3] Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong province, Qingdao

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2023年 / 37卷 / 05期

关键词：

cyclone separator; erosion thicknesses; numerical simulation; two-phase flow;

D O I：

10.3969/j.issn.1003-9015.2023.05.004

中图分类号：

学科分类号：

摘要：

The flow field and erosion characteristics of a cyclone separator were numerically simulated by Oka erosion model and computational fluid dynamics (CFD) technique. The distribution of flow field and other parameters in the cyclone were analyzed with the increase of erosion thickness. Effects of cone local erosion on the flow field and performance of the cyclone were studied. The results show that a spiral erosion zone forms on the wall of the cyclone separator, and the local erosion at the bottom of the cone near the dust outlet is the most heavily affected. The change of wall geometry caused by erosion reduces the tangential velocity and centrifugal force on particles, enhances the local vortex strength in the cone, and increases the influence of vortex core precession (PVC), which are not conducive to the stability of the mainstream and the separation of solid particles. Compared with no erosion, the particle separation efficiency of 4 μm particle decreased from 100% to 93% when the local erosion thickness was 20 mm. The cut off diameter increased from 1.3 to 1.9 μm, and the pressure drop of the equipment decreased by 40%. This work has important theoretical significance for ensuring the long-term safe and stable operation of cyclones. © 2023 Zhejiang University. All rights reserved.

引用

页码：717 / 728

页数：11

共 41 条

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