Influence of Column Top Structure on the Internal Flow Field and Classification Performance of Hydrocyclone
In response to the problem of low classification accuracy caused by short-circuit flow and circulating flow in hydrocyclones,this paper proposes a method to improve the classification accuracy of hydrocyclones by improving the column top structure.Numerical analysis is used to explore the impact mechanism of the column top structure on the internal flow field and classification performance of hydrocyclones.The results show that using an external convex column top structure can make the internal flow field of hydrocyclones more stable,and significantly reduce short-circuit flow and circulating flow,The short-circuit flow rate is only 8.1％,which is 11.5 percentage points less than the conventional cyclone.At the same time,the cutting ability of the outer convex column top structure cyclone is significantly improved compared to the conventional cyclone,with a cutting particle size of only 11.82 μm,and the classification accuracy is greatly improved.Therefore,on the basis of not changing the structure of the overflow pipe,the outer convex structure can effectively reduce the short-circuit flow rate and achieve higher product quality.
short-circuit flowcolumn top structureclassification accuracyhydrocyclone
NETL
NSTL
万方数据
