多进口旋流器流场特征及分离性能  

Flow field characteristics and separation performance of multi-inlet hydrocyclone

作　　者：张悦刊[1] 葛江波 刘培坤[1] 杨兴华[1] ZHANG Yuekan;GE Jiangbo;LIU Peikun;YANG Xinghua(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《化工进展》2022年第1期86-94,共9页Chemical Industry and Engineering Progress

基　　金：山东省自然科学基金面上项目(ZR2020ME105)。

摘　　要：为了改善单进口旋流器稳定性差、分级效率低等问题,本文提出了多进口旋流器结构。通过数值模拟方法,在恒定入料工况下,对比分析了单、二、三、四进口旋流器的流场特征和分离性能。研究结果表明:增加旋流器进口数量,会对旋流器流场和分离性能产生积极影响,有利于旋流流场径向压力的增大,且进口数量为偶数时,流场径向静压力增强效果更好;旋流器柱段区域流场切向速度增大,有利于强化旋流器分离能力。同时使用Mixture耦合RSM模型预测了离散相CaCO_(3)颗粒的分离效率,结果表明多进口旋流器可以在低速度入口条件下完成离散相的高精度分离。入料速度为3m/s的工况条件下,多进口旋流器分离50μm、57.5μm颗粒的底流分配率较单进口旋流器分别提升了10.60%、5.59%,对抑制旋流器溢流产品错配率和提高分级精度有积极的影响。因此,增加旋流器进口数量,可以有效提升旋流分级效率和分离精度。In order to improve problems of single inlet hydrocyclone such as poor stability and low grading efficiency,a multi-inlet structure of hydrocyclone was proposed.Through numerical simulation,flow field characteristics and separation performance of single,second,third and fourth inlet hydrocyclones were compared and analyzed under constant feeding conditions.The results showed that increasing the number of inlet had a positive effect on flow field and separation performance of the hydrocyclone.Increasing the inlet number of the hydrocyclone was beneficial to increase the radial pressure of the hydrocyclone flow field.When the inlet number was even,the radial static pressure enhancement effect was better.The tangential velocity of the flow field in the column section of the hydrocyclone increases with the increase of the inlet number of the hydrocyclone,which was beneficial to the enhancement of the separation performance of the hydrocyclone.Meanwhile,the separation efficiency of discrete phase CaCO_(3) particles were predicted by using the mixture coupled RSM model.The separation efficiency showed that the multi-inlet hydrocyclone can complete the high precision separation of discrete phase under the low velocity inlet condition.At the feeding speed of 3m/s,comparing with single-inlet hydrocyclone,the bottom flow distribution of 50μm and 57.5μm particles separated by multiinlet hydrocyclone increased by 10.60% and 5.59% respectively,which had positive effects on inhibiting the mismatching rate of the hydrocyclone overflow product and improving the separation performance.Therefore,increasing the number of hydrocyclone inlet can strengthen separation performance clearly.

关 键 词：多进口旋流器 流场特征 分离性能 数值模拟 

分 类 号：TQ051.8[化学工程]