微粒子懸浮液掃流薄膜過濾之探討

A Study on Cross-flow Membrane Filtration of Particulate Suspensions

潘玉敏(Yu-Min Pan)

指導教授 ： 鄭東文

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2007年)

https://doi.org/10.6846/TKU.2007.00855

摘要

本研究主要探討混合微粒子懸浮液之掃流薄膜過濾特性，實驗系統為0.15和0.8μm之聚甲基丙烯酸甲酯（PMMA）粒子混合溶液，進行過濾操作，以薄膜阻擋懸浮液中PMMA粒子。探討懸浮液成分、液體速度、氣體速度、薄膜傾斜角度和操作壓力等濾速之影響，以尋求提升掃流薄膜過濾之效能。除此之外，研究中還進行濾餅之粒徑分佈分析，以瞭解操作條件對濾餅組成之影響。
實驗結果顯示：（1）於掃流過濾中，提高液體掃流流速，對濾速提升之效果不佳。（2）多相流動能有效的提升過濾效能。（3）薄膜傾斜角度為180°時，掃流速度對濾速提升之效果明顯。（4）比較不同成分懸浮液之濾速，懸浮液成分中小粒徑粒子含量越高則濾速越低。（5）粒徑較大之粒子較容易被掃流流體帶走。

關鍵字

薄膜過濾 ； 組成 ； 微粒子懸浮液

並列摘要

The experiments for cross-flow membrane filtration of mixed particulate suspensions were carried out using mixtures of 0.15 and 0.8μm PMMA particles that were retained by the filter membrane. The effects of operating conditions, such as the composition of suspension, the liquid velocity, the gas velocity, inclination angle and filtration pressure on the permeate flux were discussed in order to searching for the efficiency enhancement in cross-flow membrane filtration. In addition, the particle size distribution of cake was analyzed in order to analyze the effect of various operating conditions on cake composition.
The experimental results were summarized as follows: (1) During cross-flow filtration, the flux improvement by increasing the liquid velocity was not apparent. (2) The multiphase flow can obviously enhance the filtration flux. (3) At 180°inclination, the cross-flow velocity could enhance the permeate flux effectively. (4) The more were the small size particles in the suspension, the lower in permeate flux was found. (5) The larger particles are swept away easily by the cross-flow velocity.

並列關鍵字

Membrane Filtration ； Composition ； Particulate Suspensions

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