Abstract： To further understand the solid-liquid separation process in the dual-cone hydrocyclone, the separation of particles with size from 5 to 50 μm in the dual-cone hydrocyclone with diameter of 100 mm was simulated, based on the multiphase model of computational fluid dynamics. The simulated particle separation efficiency and the laboratory results were compared. The results show that after entering into the inner swirl, the 5 μm particles go up quickly with the particles flow closely surrounding the air core. The upward velocity of the 25 μm particles in the inner swirl is slower than that of the 5 μm particles and they gradually flow away from the air core. The 50 μm particles enter into the inner swirl occasionally. However, they flow out with the underflow finally. Distribution of particles in the separator indicate that the smaller particles tend to distribute throughout the separator. With the increase of the particle size, the particle concentration and spatial aggregation occur successively. And the larger particles are more likely to distribute in the near wall region and the bottom of the cone.

Keywords: dual-cone hydrocyclone; solid-liquid separation; computational fluid dynamics; multiphase flow

中图分类号：TQ051.8       文献标志码：A

文章编号：1008-5548(2015)03-0006-06

DOI:10.13732/j.issn.1008-5548.2015.03.002

收稿日期：2014-08-15， 修回日期：2014-08-18，在线出版时间：2015-06-24。

基金项目：“十二五”国家科技支撑计划项目，编号：2011BAB05B01。

第一作者简介：崔瑞（1984—），男，博士研究生，研究方向为微细粒粉体的制备与固-液分离技术。 E-mail ：cuirui_1984@foxmail.com。