管式膜過濾已廣泛的被使用在固液分離程序上，
管式膜過濾組之改良將有助於提高分離效率，並且節
省操作成本。本實驗室利用模擬方式，建立出模組的構
造型態、空間網格，以及邊界條件之設定。在模組中的
速度流場、整體的過濾阻力以及在膜面上的剪應力分布
均可藉由模擬計算出，並與實驗相互對應。在模擬方
面，發現在掃流過濾程序中加入一道外加側流，將有助
於膜面上之剪應力提昇。因此，在管式膜膜組之改良方
面，於設計中加入了側流 (side stream, SD) 的概念，
即於管式模組之殼側導入一物流，企圖能達到濾速提升
之效果。實驗方面，利用外加側流之管式膜過濾實驗，
探討側流操作對濾速之影響。Tubular filtration is commonly used In
solid-liquid separation process. The improvement of
tubular filtration models helps raise separation efficiency
and saves operation cost. This experiment uses a filter
membrane, made of Zirconia, with a mean pore size of
3 .51lm PMMA particles. We study the effects of changes in
suspension concentration, transmembrane pressure,
cross-flow velocity, etc. on filtration rate. Also, we use
Computational Fluid Dynamics, CFD, Software Fluent 6.2 to simulate changes in shear-stress on the surface of the
membrane to discover tubular-membrane filtration with
side-stream, which raises filtration rate and shear-stress on
the membrane, also removing fouling on the membrane
surface.
關聯:
2008年輸送現象及其應用研討會論文摘要集 ( 2008 Symposium of transport phenomena and applications abstract book)
