自吸气三产品旋流器分离性能试验研究OA北大核心CSTPCD

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.