超滤过程中浸没式中空纤维膜组件的数学模拟优化研究

Mathematical simulation and optimization of submerged hollow fiber membrane module in ultrafiltration process

基于中空纤维膜轴向不均污染理论,运用响应曲面法建立了浸没式中空纤维超滤膜组件不同通量状态下,膜组件过滤过程中的膜阻力关于时间、空间的动态数学模型,对建立的模型进行了显著性分析及实验验证,并对中空纤维膜组件进行了数学优化.通过验证实验发现,发现实测数据与膜阻力动态数学模型计算值基本一致.通过对数学模型分析发现:在次临界通量状态下,膜丝长度及运行时间均存在最佳值;在临界和超临界状态下,膜阻力及运行时间与膜丝长度成正比.

Based on the theory of membrane fouling asymmetric distribution along areal hollow /ciDer membrane,the dynamic models of membrane resistance related to time and space under variation flux condition in ultrafiltration of hollow fiber membrane were established by Response Surface Methodology （RSM）. The remarkable analysis and experiment were carried out to verify this model. The optimization of the hollow fiber membrane module was performed using the model. The verification suggests that the model calculated value agrees with the experimental value well. Analysis of this model showed that in the subcritical flux condition, there was an optimum value of membrane fiber length and operation time. In the critical and supercritical state,membrane resistance is proportional to the fiber length and operational time.