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为了研究不同扰流元件对膜分离中浓差极化现象的削弱作用,定量研究和分析了膜通道内五种扰流元件的对流强化传质效果,结果表明:三棱柱、四棱柱和圆柱虽然可以有效降低浓差极化因子即有效强化传质,但其所带来的压力损失较大;而具有三维结构的三角翼和矩形翼可以在一定程度上减少浓差极化因子,同时所引起的压力损失比上述二维柱体小得多。通过综合比较五种扰流元件的性能可知:在等压力损失下三棱柱的传质强化效果最差,矩形翼的传质强化效果最好。
In order to study the weakening effect of different disturbing elements on the phenomenon of concentration polarization in membrane separation, the effect of convective enhancement and mass transfer of five kinds of disturbing elements in the membrane channel was quantitatively studied and analyzed. The results show that although triangular, quadrangular and cylindrical Can effectively reduce the concentration polarization factor that is effectively enhanced mass transfer, but the resulting pressure loss greater; and the three-dimensional structure of the delta wing and rectangular wing can reduce the concentration polarization factor to some extent, caused by the same time The pressure loss is much smaller than the above two-dimensional cylinder. Through a comprehensive comparison of the performance of the five spoiler components, we can see that the mass transfer enhancement of the triangular prism is the worst under the condition of equal pressure loss, and the mass transfer enhancement of the rectangular wing is the best.