在高分子超滤膜污染机理分析的基础上,结合连续性方程,建立了基于Darcy定律、对流扩散方程以及吸附动态方程的污染过程数学模型;通过有限元模拟,得到了膜厚度方向渗透通量的时间演变特点,并揭示了溶液性质以及膜物性参数对膜渗透通量的影响规律;进而分析了膜渗透通量减小的原因,可以为生产实践提供参考。
On the basis of the polymeric ultrafiltration membrane fouling mechanism and the continuity equation,the mathematical model of the membrane fouling process was constructed according to the Darcy＇s law,convection-diffusion equation and dynamic adsorption equation.The evolution characteristics of the flow flux and the relationship between the permeability and the flow flux along the membrane thickness direction were obtained by means of the finite element simulation.And then the influence of the feeding solution properties such as bulk solution concentration and particle size,and the effect of the ultrafiltration membrane properties including adsorption and desorption constants on the flow flux were revealed.The reasons why the flow flux declined with the time increasing were analyzed,which would be helpful for the ultrafiltration process design in practice.
参考文献
| [1] | 徐南平,高从堦,时钧.我国膜领域的重大需求与关键问题[J].中国有色金属学报,2004(z1):327-331. |
| [2] | S.GJ.Heijman;M.D.Kennedy;GJ.van Hek .Heterogeneous fouling in dead-end ultrafiltration[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2005(1/3):295-301. |
| [3] | Maryna Peter-Varbanets .Stabilization of flux during dead-end ultra-low pressure ultrafiltration[J].Water research: A journal of the international water association,2010(12):P.3607. |
| [4] | Serra C.;Moulin P.;Rouch JC.;Aptel P.;Clifton MJ. .Dead-end ultrafiltration in hollow fiber modules: Module design and process simulation[J].Journal of Membrane Science,1998(2):159-172. |
| [5] | Bessiere Y;Fletcher DF;Bacchin P .Numerical simulation of colloid dead-end filtration: Effect of membrane characteristics and operating conditions on matter accumulation[J].Journal of Membrane Science,2008(1/2):52-59. |
| [6] | R.Ghidossi;D.Veyret;P.Moulin .Computational fluid dynamics applied to membranes:State of the art and opportunities[J].Chemical Engineering and Processing,2006(6):437-454. |
| [7] | Hansen M.;Hassager O.;Barker VA. .Spectral element simulation of ultrafiltration[J].Chemical Engineering Science,1998(17):3099-3115. |
| [8] | Joao M. Miranda;Joao B. L. M. Campos .Impinging jets confined by a conical wall - high Schmidt mass transfer predictions in laminar flow[J].International Journal of Heat and Mass Transfer,2001(7):1269-1284. |
| [9] | Paris J.;Guichardon P.;Charbit F. .Transport phenomena in ultrafiltration: a new two-dimensional model compared with classical models[J].Journal of Membrane Science,2002(1):43-58. |
| [10] | YUN SUNG KIM;ANDREW J. WHITTLE .Filtration in a Porous Granular Medium: 1. Simulation of Pore-Scale Particle Deposition and Clogging[J].Transport in porous media,2006(1):53-87. |
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