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題名 | 粉狀吸附劑吸附程序(2):逆流多級吸附研究=Adsorption Process of Powder Adsorbent (Ⅱ): Countercurrent Multistage |
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作者 | 曾如玲; 吳豐智; | 書刊名 | 聯合學報 |
卷期 | 15 1997.11[民86.11] |
頁次 | 頁459-478 |
分類號 | 445.463 |
關鍵詞 | 粉狀吸附劑; 吸附程序; 逆流多級吸附; 廢水處理; |
語文 | 中文(Chinese) |
中文摘要 | 一般粉狀吸附劑都採單批式操作,吸附劑無法充分利用,造成吸附劑使用量偏高 之困擾。鑑此,在前文曾以 Freundlich 等溫式為基礎,以探討共流多級吸附程序,本文繼 續利用逆流的理想級數理論,進行理論解析,獲得二級、三級和∞級之吸附劑使用量及各級 間濃度之方程式,並將理論方程式經數值方法運算加以繪圖,探討各變數(級數、吸附劑質 量比、各級間濃度比、溶液出入口濃度比、等溫常數 n )相互關係。 結果顯示,逆流多級 吸附劑使用量較單批式低, 且兩者比值隨級數的增加、進出口濃度比的降低和 Freundlich 常數 n 值的降低而下降; 同時,比較相同級數共流與逆流吸附程序吸附劑使用量之差異。 此外,藉由粉狀附劑活性白土在攪拌槽進行染料溶液之逆流多級吸附實驗,證實理論解析之 準確性。解決了粉狀吸附劑以單批式操作時,吸附容量偏低的問題,提供評估最佳操作級數 之依據,並做為設計逆流多級吸附程序之參考。 |
英文摘要 | Usually powder adsorbent is operated with single stage batch reactor. Adsorbent can not be utilized sufficiently, thus enormouse amount of adsorbent is needed. Being based on Freundlich isotherm, the author have submitted a paper inventigating cocurrent multistage adsorption process. In this study, theory of countercurrent equilibrium stage was adopted to analyze the required quantities of adsorbent and the formula for the concentration of each stage for the two stage, three stage and infinite stage processes. The theoretical formula are depicted qraphically with numderical method. Corelations between parameters (number of stages, ratio of adsorbent of dosages,ratio of concentrations between stages, ratio of the concentrations of inflow and outflow, isotherm constant n).The results showed that the required dosage of countercurrent multiple stage process was less than that of single batch process. The ratio was less aat the increased stages, the decreased ratio of the concentrations of inflow and outflow, and the decreased Freundlich constant n.Comparisons between cocurrent and countercurrent processes of identical stages are presented.The accuracy of theoretical analysis of countercurrent multistage process was proved with adsorbent activated white clay in stirred tank with dye as absorbate.Low adsorption capacity at single batch process was sloved. Optimum stage number was provided for designing multistage countercurrent process. |
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