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首页> 外文期刊>Theoretical foundations of chemical engineering >Nonuniform Deposition of Particles inside the Pores of a Semipermeable Membrane
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Nonuniform Deposition of Particles inside the Pores of a Semipermeable Membrane

机译：半透膜孔内颗粒的非均匀沉积

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摘要

Macroscopic equations of the theory of filtration through granular beds are used to consider the spatial nonuniformity of particle deposition on pore walls during the standard blocking of the pores of ultrafiltra-tion (UF) and microfiltration (MF) membranes. It is shown that the thickness of the layer of particles deposited inside the pore is characterized by a high degree of nonuniformity, which considerably affects the values of membrane permeate flux and selectivity. The effect of pore diameter, pore length, transmembrane pressure, and the coefficient of particle deposition onto the inner pore surface on the performance of standard blocking is studied. A dimensionless number representing the combination of the above parameters is proposed. The number can be used for optimizing the choice of membranes and process parameters for the UF and MF processes using standard blocking.
机译：通过颗粒床过滤理论的宏观方程式被用来考虑在超滤膜（UF）和微滤膜（MF）的标准孔阻塞过程中，颗粒在孔壁上沉积的空间不均匀性。结果表明，沉积在孔内的颗粒层的厚度具有高度的不均匀性，这极大地影响了膜渗透通量和选择性的值。研究了孔径，孔径，跨膜压力以及颗粒沉积在内孔表面的系数对标准封堵性能的影响。提出了代表上述参数组合的无量纲数。该数字可用于使用标准封堵优化UF和MF工艺的膜选择和工艺参数。

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