Improvement of Particle Separation Efficiency by Installing Conical Top-Plate in Hydrocyclone
學年 101
學期 1
出版（發表）日期 2012-12-01
作品名稱 Improvement of Particle Separation Efficiency by Installing Conical Top-Plate in Hydrocyclone
作品名稱（其他語言）
著者 Hwang, Kuo-jen; Hwang, Ya-wen; Yoshida, Hideto; Shigemori, Kazuha
單位 淡江大學化學工程與材料工程學系
出版者 Lausanne: Elsevier S.A.
著錄名稱、卷期、頁數 Powder Technology 232, pp.41-48
摘要 The improvement of particle separation efficiency in a 20-mm hydrocyclone by installing a conical top-plate is studied. The effects of top-plate cone angle on the fluid velocity distributions and particle trajectories are discussed using computational fluid dynamics. Conical top-plate installation could effectively reduce the low velocity regions near the outer vortex finder surface. Increasing the cone angle will decrease the cross-sectional area of downward flow in the upper cylindrical part, decrease the circulation flow and therefore increase the tangential velocity and centrifugal effect near the hydrocyclone wall. Particle trajectories are simulated based on a Lagrangian frame by considering the interactions with continuous phase once the fluid velocity distributions are known. Quicker particle collection is induced into the underflow by installing a conical top-plate. However, too quick downward flow may increase the possibility of particle entraining into the secondary vortex in the conical part under a given underflow ratio. The calculated values of particle separation efficiency are compared with the available experimental data to verify numerical method accuracy. The simulated results agree fairly well with the experimental data. It can be concluded that installing a conical top-plate is beneficial for improving particle separation efficiency. The optimum cone angle design is 30°.
關鍵字 Hydrocyclone; Particle separation; Particle classification; Computational fluid dynamics; Reynolds stress model
語言 en_US
ISSN 0032-5910 1873-328X
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Hwang, Kuo-jen
審稿制度 是
國別 CHE
公開徵稿
出版型式 紙本 電子版
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