摘要
针对常规三产品旋流器在分离过程中,一段内部难以形成稳定的空气柱,影响旋流器总体分离精度的问题,提出一种自吸气三产品旋流器.在一段旋流器底部中心开设吸气孔,促使空气经开孔处进入旋流器分离腔形成贯通空气柱,达到稳定内部流场、提高旋流分离精度的目的.通过开展对比试验和单因素试验,探究了自吸气三产品旋流器的分离性能.结果表明,相较于常规三产品旋流器,自吸气三产品旋流器的一段溢流产率增加了21.70%,-15 μm颗粒累积含量增加了6.46%,综合分级效率提高了12.30%;单因素试验条件下,气孔直径为5 mm,一段溢流管直径为25 mm,二段底流口直径为8mm时,自吸气三产品旋流器具有较高的分离性能.研究成果有助于丰富旋流分离理论,对多产品旋流器的优化设计具有一定的理论指导意义.
Abstract
In the separation process of conventional three-product hydrocyclone,it was difficult to form a stable air column inside the first stage hydrocyclone,affecting the overall separation accuracy of the hydrocyclone.For the above problems,a self-aspirating three-product hydrocyclone was proposed.A suction hole was set at the bottom center of the first stage hydrocyclone to induce air to enter the separation chamber through it and form a through air column so as to achieve the purpose of stabilizing the internal flow field and improving the separation accuracy.The separation performance of the self-aspirating three-product hydrocyclone was investigated through comparative test and single factor test.The results show that compared with the conventional three-product hydrocyclone,the overflow yield of the first stage of the self-aspirating three-product hydrocyclone increased by 21.70%.The cumulative content of-15 μm particles increased by 6.46%and the comprehensive classification efficiency increased by 12.30%.Under the conditions of single factor test,the self-aspirating three-product hydrocyclone has higher separation performance when the hole diameter is 5 mm,the vortex finder diameter of the first stage hydrocyclone is 25 mm,and the apex diameter of the second stage hydrocyclone is 8 mm.The research results are helpful to enrich the theory of cyclone separation,and have certain theoretical guiding significance for the optimal design of multi-product cyclones.
基金项目
国家自然科学基金项目(22108159)
辽宁省"兴辽英才计划"项目(XLYC2204015)
国家科技期刊平台
NSTL
万方数据