化工进展2017，Vol.36Issue(12)：4371-4377,7.DOI:10.16085/j.issn.1000-6613.2017-0625
旋流器的微米级颗粒分级性能分析
Analysis of the classification performance of micron particles with
hydrocyclones
袁惠新 1方勇 2付双成 1叶娟 2方毅1
作者信息
- 1. 常州大学机械工程学院,江苏常州 213164
- 2. 常州大学江苏省绿色过程装备重点实验室,江苏常州 213164
- 折叠
摘要
Abstract
The high gravity field and turbulent shear field can strengthen the classification of micron particles in micro hydrocyclone. In order to analyze the classification performance of micron particles with hydrocyclones,the effect of inlet velocity and underflow ratio on hydrocyclone classification were studied by combination of experiment and numerical simulation. The Reynolds stress model was used to simulate the flow field of micro hydrocyclone in numerical simulation,the micro hydrocyclone of 20mm in diameter was used to classify granular materials whose particle size distribution was 2—50μm in the experiments. The results showed that with the increase of inlet velocity,the cut sizex50 decreases,thex50 is 4.8μm,and the classification precisionH increases,theH is 0.45. With the increase of underflow ratioRf,the tangential and radial velocity are not significantly changed. The settling velocity of particles has no obvious change in the hydrocyclone,but the axial velocity will decrease, which makes the residence time of particles increase in the hydrocyclone. The classification efficiency improves. When underflow ratioRfis less than 0.6,with the increase ofRf,the cut sizex50 decreases. Thex50 is 4.7μm and the classification precisionH increases,theH is 0.6. When underflow ratioRfis greater than 0.6,the cut sizex50 increases,and the classification precisionH decreases.关键词
微型旋流器/数值模拟/粒度分布/颗粒物料Key words
micro hydrocyclone/numerical simulation/particle size distribution/granular materials分类
化学化工引用本文复制引用
袁惠新,方勇,付双成,叶娟,方毅..旋流器的微米级颗粒分级性能分析[J].化工进展,2017,36(12):4371-4377,7.
