Effect of inlet position on the performance of a multi-inlet gas cyclone
DONG Sijie1,, YANG Liu2, ZHANG Zihui1, WANG Bo1,,, JIANG Yunchao1 1.Engineering Research Center of Fine Particle Pollution Control Technology and Equipment, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China 2.Sinopec Catalyst Company Changling Division, Yueyang 414012, China
Abstract:Symmetrical multi-inlet structure can improve the performance of gas cyclone, but there is no clear specification for the choice of inlet location. Based on the Lapple cyclone, four quadruple-inlet cyclones with different inlet positions were designed in this study. The influence of the inlet position on its flow field and separation performance of the cyclones was studied using numerical simulation methods. Results show that when the inlet is radially outward, the tangential velocity can be kept stable, the short-circuiting flow rate is small, the pressure drop is low, and the separation efficiency is high. When the inlet is radially inward, the tangential velocity decreases, the short-circuiting flow rate increases, the pressure drop decreases, and the separation efficiency also decreases significantly. The effect of the position of the inlet in the axial direction on the flow field and separation performance is not significant. The inlet that is radially outward and axially upward is found to be the optimal design. Key words:gas cyclone/ dust removal/ multiple inlet/ inlet position/ numerical simulation/ flow field.
图1旋风分离器主体结构和入口位置示意图 Figure1.Schematic diagram of main structure and inlet location of the gas cyclone
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1.Engineering Research Center of Fine Particle Pollution Control Technology and Equipment, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China 2.Sinopec Catalyst Company Changling Division, Yueyang 414012, China Received Date: 2020-05-13 Accepted Date: 2020-10-10 Available Online: 2021-02-22 Keywords:gas cyclone/ dust removal/ multiple inlet/ inlet position/ numerical simulation/ flow field Abstract:Symmetrical multi-inlet structure can improve the performance of gas cyclone, but there is no clear specification for the choice of inlet location. Based on the Lapple cyclone, four quadruple-inlet cyclones with different inlet positions were designed in this study. The influence of the inlet position on its flow field and separation performance of the cyclones was studied using numerical simulation methods. Results show that when the inlet is radially outward, the tangential velocity can be kept stable, the short-circuiting flow rate is small, the pressure drop is low, and the separation efficiency is high. When the inlet is radially inward, the tangential velocity decreases, the short-circuiting flow rate increases, the pressure drop decreases, and the separation efficiency also decreases significantly. The effect of the position of the inlet in the axial direction on the flow field and separation performance is not significant. The inlet that is radially outward and axially upward is found to be the optimal design.