Swirling Flow Enhanced Multi-phase Flow Separation Process

This thesis studies phase flow characteristics in swirling flow field,it has important scientific value for exploring multi-phase flow separation mechanism and practical significance for engineering design and equipment optimization.In this paper,the computational fluid dynamics(CFD)method and the visualization experiment are conducted.In summary,the main conclusions are as follows:1.The particle movement and distribution in the cyclone separator with six angle structures under the optimized method are studied by RSM+DPM method,and the performance of the separator is evaluated.The results show that the hexagon cyclone separator can reduce the residence time of micron grade particles,reduce the pressure drop of the equipment,and reduce the abrasion of the particles to the equipment.2.The design of the integrated cyclone separator and the study of the flow field.The low consumption and high efficiency gas solid separation of the two-stage integrated cyclone separator was strengthened through the construction of a radial and annular hexagon cyclone flow channel.3.A mathematics model of the tangential inlet-outlet membrane module shell-side configuration has been established.The model contains six hollow fiber membrane tubes.By analyzing the pressure distribution around the membrane tube and the wall shear stress,the turbulent resistance reduction mechanism is illustrated,and the permeate water ratio of the membrane is increased by 1.56 times experimentally.4.The distribution and movement of liquid-liquid two phase flows in a conical spiral tube oil-water separator.Using VOF + RSM method,it is proved that the beneficial structure of conical spiral tube can obtain lower wall shear stress inside the tube,thus inhibiting oil phase emulsification and enhancing oil-water separation.It is found that the deoiling efficiency increases when the ratio of the water outlet and the speed of the oil exit is increased.Moreover,the surface roughness,the surface hydrophobicity and the microstructural surface also make the separator better separation performance.