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研究生:王俊惠
研究生(外文):Chun-Hui Wang
論文名稱:進料中雜質對非均相共沸蒸餾之影響
論文名稱(外文):Influences of Feed Impurity for Heterogeneous Azeotropic Distillation
指導教授:黃孝平黃孝平引用關係
指導教授(外文):Hsiao-Ping Huang
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:化學工程學研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:98
中文關鍵詞:非均相共沸蒸餾
外文關鍵詞:Heterogeneous Azeotropic Distillation
相關次數:
  • 被引用被引用:2
  • 點閱點閱:245
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本研究主要針對醋酸去水製程中進料之雜質對非均相共沸蒸餾程序之影響進行探討,採實際工廠的操作數據利用電腦穩態與動態模擬,以探討醋酸異丁酯為共沸劑的醋酸去水製程在進料中同時含有間位二甲苯和醋酸甲酯時對整體蒸餾分離系統所造成的影響。發現蒸餾過程中間位二甲苯會在蒸餾塔中會慢慢累積,最後將導致無法控制系統以符合產品規格。改善的方法是在蒸餾塔上加一側分流(sidedraw)來解決,並由年總成本(TAC)的計算分析尋找最經濟的設計架構,包括側分流的出料板數、流量與共沸劑的最適補充流量等影響因素。但因側流量太小不易操作,本文亦模擬採用溫度測量,定時由側分流排出的操作方式,並在模擬中決定側分流排出之時間及流量。吾人進一步發現在不須醋酸異丁酯為共沸劑的情況下,原本存在於進料中所含的間位二甲苯在電腦模擬中顯示其亦可以做為絕佳的共沸劑,如此可以省去醋酸異丁酯的添加,對此工業醋酸去水製程的改善可能會有極佳的助益。

In this research, we discuss the influence of feed impurities m-xylene and methyl acetate on the operation for dehydration of acetic acid by heterogeneous azeotropic distillation. A concept is presented for the design of side-draw to prevent the accumulation of m-xylene composition in distillation column from long-term operation. The theoretical research illustrates steady-state and dynamic simulations of an industrial column. Optimal TAC estimation decides the best side-draw stage, flow rate and feasible make-up flowrate of entrainer, iso-butyl acetate, into the column. As the flowrate of side-draw is too low it will be not easy to operate smoothly in experiential application. We purge higher side-draw flowrate to make the process more practicable in dynamic simulation. According to the result of simulation we can decide the better purge time and flowrate of side-draw stream. In particular, we find the m-xylene from feed line could be a better entrainer for the industrial separation of acetic acid-water system. It can improve the process to have more economic benefits.

誌謝 I
摘要 II
Abstract III
目錄 IV
圖表目錄 VI
第一章 緒論 1
1.1 共沸蒸餾製程之目的 3
1.2 共沸物之定義及種類 3
1.3 共沸蒸餾製程型式 5
1.4 文獻回顧 8
1.4 1 多重穩態解與參數敏感性 8
1.4.2 動態表現與控制 9
1.5 組織章節 12
第二章 熱力學模式 13
2.1 模式與參數之建立 13
2.2 蒸餘曲線(RCM) 18
第三章 穩態模擬與初步動態模擬分析 23
3.1 穩態模擬分析 23
3.2 初步動態模擬分析 31
3.2.1 自由度分析 31
3.2.2初步動態模擬結果 32
3.3 製程改善設計 33
3.3.1 排除雜質MX造成之不良影響 33
3.3.2 TAC最適化計算 34
第四章 動態模擬 43
4.1 控制架構 44
4.2決定溫度控制塔板 46
4.3動態模擬分析 47
4.3.1 干擾變化1 之動態模擬測試 47
4.3.2 干擾變化2 之動態模擬測試 53
4.4排除MX不良影響的改善 61
4.5不添加IBA共沸劑的探討 66
第五章 結論 75
附錄A 熱力學模式 77
附錄B TAC計算公式 91
參考文獻 95




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