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Influence of Flow Arrangement on the Performance of Membrane Mass Exchangers

流動方式對薄膜質量交換器性能之影響

摘要


本文中得出薄膜質量交換器效率之解析解,此薄膜質量交換同時具有透析與超過濾作用。薄膜質量交換器之效率隨溶質質傳係數、超過濾濾速、及透析液流量之增加,或隨保留液流量之降低而增加。在相同之傳送單元數下,以逆流流動方式者之質傳速率為最大,而超過濾速對質傳速率之提昇則以順流流動方式者中最為明顯。

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並列摘要


Analytical solutions of the effectiveness of membrane mass exchangers, including the effects of dialysis and ultra filtration, have been obtained for various flow arrangements. The effectiveness of a membrane mass exchanger increases with the increase in the so solute mass transfer coefficient, ultrafiltration flux and dialysate flow rate, as well as with the decrease in the retentate flow rate. Based on the same number of transfer units, the mass transfer rate in the counter-current flow arrangement is the largest, and the enhancement of mass transfer by means of the ultrafiltration flux in the co-current flow system is the highest.

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