平底结构对水力旋流器流场特性及分离性能影响  

Effect of Flat Bottom Structure on Flow Field Characteristics and Separation Performance of Hydrocyclone

作　　者：王书礼 王磊 崔宝玉[3] 侯端旭 季安坤 姜程阳 WANG Shuli;WANG Lei;CUI Baoyu;HOU Duanxu;JI Ankun;JIANG Chengyang(Weihai Haiwang Hydrocyclone Co.,Ltd.,Weihai 264200,Shandong,China;School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]威海市海王旋流器有限公司,山东威海264200 [2]中南大学资源加工与生物工程学院,长沙410083 [3]东北大学资源与土木工程学院,沈阳110819

出　　处：《有色金属（选矿部分）》2022年第6期141-146,共6页Nonferrous Metals（Mineral Processing Section）

摘　　要：基于数值模拟对比了渐缩平底旋流器与复合锥角旋流器流场特性,探究平底结构对水力旋流器流场的影响。结果表明,两种水力旋流器压强分布和切向速度分布基本一致,而空气柱附近压强梯度存在差异;渐缩平底旋流器溢流管下方湍流强度较低而底流口附近则相反;渐缩平底旋流器柱-锥交界面的空气柱附近轴向速度较高,导致其分流比较低。实验室旋流分离试验结果表明,平底结构能有效抑制溢流跑粗和底流夹细现象,显著提高分级效率,改善水力旋流器分离性能。Based on numerical simulation,the flow field characteristics of the contract gradual flat bottom hydrocyclone and the multi cone hydrocyclone were compared to explore the effect of flat bottom structure on the flow field of hydrocyclones.Results showed that the pressure distribution and tangential velocity distribution of the two hydrocyclones were basically the same,but the pressure gradient in the vicinity of the air core was different.The turbulence intensity under the vortex finder of the contract gradual flat bottom hydrocyclone was relatively low,while the turbulence intensity near the spigot was the opposite.The axial velocity near the air core at the cylindrical-cone interface of the contract gradual flat bottom was higher,resulting in a low split ratio of hydrocyclone.The laboratory cyclone separation test showed that the flat bottom structure can effectively suppress the phenomenon of coarse particles misplaced in the overflow and fine particles misplaced in the underflow,and significantly improved the classification efficiency,thereby improving the separation performance of the hydrocyclone.

关 键 词：水力旋流器 平底结构 渐缩平底 复合锥角 流场特性 

分 类 号：TD454[矿业工程—矿山机电]