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Mechanism of microfiltration on the rotating track membrane

机译：旋转轨道膜微滤机理

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摘要

Application of the particle track membranes (PTM) for separation in cross-flow and rotary dynamic filters has been investigated.For economical point of voew the obtained filtration rates of the PTM membranes are acceptble. The inspection of the photograph, obtained from scanning electronic microscope revealed changes at the membranes surfaces. Application of the PTM membranes in the cylindrical filter revealed a clear self-cleaning effect of the membrane surface. That effect results in diminishing the resistance exerted by the residual cake, and in the case of the PTM membrane in appearance of the parts of the filtration surface free of the deposited cake. The fraction of that free surface obviously depends on the type of suspension, which indicates the relevance of the properties in the system, cake- separation surface in the dynamic filters. Thus, the filtration mechanism on the PTM membranes is complex and cannot be described by the typical models of microfiltration. The filtration across the residual cake, which covers a part of the membrane, and across a part of the membrane, which is free of the cake, with partially pores blockage effect, indicates that the inroduction of the concept of the parallel resistances is justified. Based upon the estimated values of the process parameters os filtration on rotary membrane an illustration of the proposed model has been given.
机译：研究了颗粒跟踪膜（PTM）在错流和旋转动态过滤器中分离的应用。从经济角度出发，获得的PTM膜过滤速率是可以接受的。从扫描电子显微镜获得的照片的检查揭示了膜表面的变化。 PTM膜在圆柱形过滤器中的应用表明，膜表面具有明显的自清洁效果。该作用导致残留滤饼施加的阻力减小，并且在PTM膜的情况下，过滤表面的部分表面没有沉积的滤饼。该自由表面的分数显然取决于悬浮液的类型，这表明了系统性能的相关性，即动态过滤器中的饼分离表面。因此，PTM膜上的过滤机制很复杂，无法用典型的微滤模型描述。覆盖覆盖膜的一部分的残留滤饼和没有滤饼的部分膜的过滤，具有部分孔阻塞效应，表明引入并联电阻的概念是合理的。基于在旋转膜上过滤的过程参数的估计值，给出了所提出模型的图示。

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