蜗壳式进料体旋流器截面形状对分离性能的影响  

Effect of the Cross-sectional Shape of Volute Inlet Structure Hydrocyclone on Separation Performance

作　　者：宋颖 张悦刊[1] 赵洪涛 姜志华 SONG Ying;ZHANG Yuekan;ZHAO Hongtao;JIANG Zhihua(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Dandong Dongfang Measurement and Control Technology Co.,Ltd.,Dandong 118002,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 [2]丹东东方测控技术股份有限公司,辽宁丹东118002

出　　处：《金属矿山》2023年第10期175-181,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:22108159);山东省自然科学基金项目(编号:ZR2021QB068,ZR2020ME105)。

摘　　要：旋流器是一种利用离心沉降原理来完成不同粒度或不同密度物料快速分离的设备。旋流器进料体结构和截面形状能够降低能耗并起到预分离作用,从而改善颗粒运动行为,提高旋流器分离性能。提出了一种新型蜗壳式进料体结构,采用数值模拟方法探究了截面形状对旋流器内部流场特征和分离性能的影响,在此基础上,对其实际分级效果进行了试验研究。数值模拟结果表明:蜗壳式进料体结构能够降低湍流强度和湍流黏度,提高流场稳定性,降低旋流器能耗,其中R-R型进料体结构旋流器压力梯度最大,压降最小,湍流强度最低,流场最为稳定。旋流分离试验结果表明,蜗壳式进料体旋流器底流固相产率比传统切向入口旋流器增加了3.28%,分级效率也有一定程度的提高。研究结果可为旋流器进料体结构设计与优化提供理论指导。Hydrocyclone is a device that utilizes centrifugal force to accelerate the settling velocity of slurry particles and separates them according to the difference in particle density.It is widely used in closed circuit grinding systems.Reasonable structure and cross-sectional shape of the feed body can reduce energy consumption and play the role of pre-separation.It also improve the particle motion behavior and separation performance.In this paper,a new type of volute feed body structure is proposed.Numerical simulation is used to investigate the influence of cross-section shape on the internal flow field characteristics and separation performance of the hydrocyclone.On this basis,the actual classification effect is experimentally investigated.The numerical simulation results show that the volute feed body structure can reduce the turbulence intensity and turbulence viscosity,improve the stability of the flow field,and reduce the energy consumption of the hydrocyclone.Among them,the R-R type feed body structure has the largest pressure gradient,the smallest pressure drop,the lowest turbulence intensity,and the most stable flow field.The experiment results show that the underflow solid phase yield of the volute inlet body hydrocyclone increased by 3.28%compared with that of the traditional tangential inlet hydrocyclone.The classification efficiency is also improved to a certain extent.The results can provide theoretical guidance for the design and optimization of the hydrocyclone inlet body structure.

关 键 词：旋流器 蜗壳式进料体 流场特征 分离性能 

分 类 号：TD921.5[矿业工程—选矿]