旋转流强化管式膜微滤过程中分离因数研究

分离因数是影响旋转流强化管式膜微滤过程的关键操作变量之一。本文首先对管式膜分离器内分离因数的分布特征进行了研究，然后，不仅从理论上研究了分离因数对过滤过程行为的影响，而且进行了探讨分离因数对过滤性能影响的试验研究。结果表明，管式膜分离器内分离因数沿轴向从顶部到底部呈迅速减小的分布特征；分离因数的增大，可使过滤过程推动力提高，并使外旋流时过滤过程中固相颗粒不易向膜面迁移并沉积，但加剧了内旋流时过滤过程中固相颗粒向膜面迁移并沉积的趋势；在悬浮液固相浓度保持一定时，过滤通量随分离因数的增大而提高

Research on the Separating Factor in Enhanced Crossflow Microfiltration Process within Tubular Membrane Module with rotating flow

Centrifugal coefficient is a key operation variable in the enhanced crossflow microfiltration process within tubular membrane by introducing rotating flow.The distribution of the centrifugal coefficient in the tubular membrane separator was investigated firstly,and,not only was the effect of centrifugal coefficient on the separation behavior in tubular membrane separator theoretically studied,but also the effect of centrifugal coefficient on the separation performance was experimentally invesigated.The research results show that the centrifugal coefficient drops sharply from top to bottom axially in the tubular membrane separator and the driving force in the microfiltration process increases with the centrifugal coefficient increasing.Solid particles in outsidehelicalflow are prevented to move towards the membrane,while those in insidehelicalflow are in the opposite conditon.When the s