Solid Particles Effect on Oil Droplets Migration Trajectory in Oil-Water Separation Hydrocyclone
For purpose of analyzing the effect of sand medium parameters on the migration trajectory of oil droplets in a hydrocyclone,and through basing on coupling calculation model of the computational fluid dynamics method and discrete element method,the oil droplet migration trajectory with different sand con-centrations was studied for conventional double tangential inlet oil-water separation hydrocyclone,including having the effect of solid particles with different concentrations on the flow field distribution,oil droplet migration trajectory and oil-water separation performance of the target hydrocyclone analyzed systematically.The numerical simulation results show that,with the increase of solid particle concentration,the pressure at the overflow outlet increases and the differential pressure of the flow field of the overflow outlet decreases and both axial and tangential velocity in the cylindrical section of the hydrocyclone decrease,including the separation efficiency.In addition,with the increase of the injected solid particle's concentration,the oil droplet trajectory shows the characteristics of unstable spiral rise,spiral decline and local circulation.Meanwhile,under the action of the pressure gradient of the flow field,the local circulation trajectory of the oil droplet gradually moves towards the bottom flow mouth and the offset increases with the even increase of the solid particle concentration.
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