The role of fouling in optimizing direct-flow filtration module design
The role of fouling in optimizing direct-flow filtration module design
复制标题
DOI：
10.1016/j.ces.2017.01.043
复制
发表时间：
2017-05
影响因子：
4.7
通讯作者：
Mylène Wang;S. Mondal;I. Griffiths
中科院分区：
文献类型：
--
作者：
Mylène Wang;S. Mondal;I. Griffiths
局部跨膜压分布对中空纤维微滤和超滤膜装置的性能起着至关重要的作用。直流式过滤器包括包裹在单个组件中的中空纤维阵列。每根中空纤维中的TMP依赖于相邻纤维之间的间距，并由于污染物(污垢)堵塞毛孔而随时间演变。我们考虑了一种理想的装置，在这种装置中纤维是不可变形的，并且在装置内是等间距的，并研究了过滤过程中孔堵塞现象对TMP的影响。该模型被用来评估在规定时间之后或在滤块之前最大化处理的流体的最佳纤维间距及其与膜透过率和污染速率的关系。我们发现，通过在制造过程中仔细选择光纤间距，可以显著提高直流型器件的运行效率。
The local transmembrane pressure (TMP) distribution plays a crucial role in the performance of hollow-fiber microfiltration and ultrafiltration membrane devices. A direct-flow filter comprises an array of hollow fibers encased within a single module. The TMP in each hollow fiber is dependent on the spacing between neighboring fibers, and evolves with time due to pore clogging by contaminants (fouling). We consider an idealized set-up in which the fibers are undeformable and equally spaced within the device, and study the impact of the pore-blocking phenomena on the TMP during the filtration process. The model is used to evaluate the optimum inter-fiber spacing that maximizes the fluid processed either after a prescribed time or before the filter blocks and its dependence on the membrane permeability and the fouling rate. We show that significant improvements can be made on the operating efficiency of a direct-flow device through careful choice in the fiber spacing during fabrication.