切線進料之管式膜過濾研究

A Study of Tubular Membrane Filtration with Tangential Feed

洪嘉澤(Jia-Tze Hung)

指導教授 ： 吳容銘

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2012年)

https://doi.org/10.6846/TKU.2012.01161

摘要

目前所知之管式膜模組多半將膜束置於一管殼內，以致該管殼內之流道空間相對狹小，然後藉由高壓差方式將待過濾溶液輸入管殼內，且進口方式乃從管殼中間進入，造成不必要之動量損失。
本研究於管式膜過濾模組中將進料口方式改為與管殼切線方向進入，並將管殼空間變大，使得進料溶液不會因碰撞到膜管而產生不必要之紊流以及動量損失，降低壓差節省能源。此外，企圖改變流場中的流力狀態、增加膜面上的剪應力，使膜阻力降低進而提升濾速。實驗方面，採用平均孔徑為0.8um的複合陶瓷膜，過濾平均粒徑為30~40um的馬鈴薯澱粉聚粉體，探討以不同過濾壓力、不同懸浮液濃度、不同體積流率以及相同進料速度下之操作條件，比較管式膜過濾基本系統和切線系統之效率。

關鍵字

管式膜過濾 ； 切線進料 ； 結垢 ； 掃流過濾

並列摘要

Presently, we know that tubular membrane modules are set up a inner of pipe, so space of channel is narrow relatively at inner of pipe that suspension was used to high pressure transport to inner of pipe, furthermore, suspension was conveyed from medium of pipe shell, therefore, the inner-in way would cause needless momentum losses.In the study, we made suspensions inner-in way to improve on tangent feed way from outside of pipe shell on tubular membrane filtration module, besides, made channel of pipe shell to be wide so that feed suspension was unable to contact tubular membrane to product turbulences and momentum losses, moreover, reduced transmembrane pressure and economized power. Aside from, we attempted to alter fluid state at the system of filtration and increased sheer-strss on membrane then decrease the resistance and promoted the filtration rate. This experiment used a made of Zirconia filter membrane with a mean pore size of 0.8um was used to filter Potato Starch particles of 30um to 40um and we compared with basic system and tangent system of tubular membrane filtration efficiencies by different operating conditions from transmembrane pressure, suspension concentration, volume flow rate and uniform feed velocity.

並列關鍵字

tubular-membrane filtration ； tangent feed ； fouling ； cross-flow filtration

參考文獻

潘玉敏，“微粒子懸浮液掃流薄膜過濾之探討”，碩士論文，淡江大學化學工程與材料工程學系，(2007)

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