蒸餾塔啟動為化學製程中極為複雜之動態操作之一，其程序包含有複雜的熱傳以及質傳並且擁有大範圍的操作條件。啟動至到達穩定操作條件所經過的時間與消耗的能源並不具有生產力，因此降低啟動過程的時間和能耗是相當重要的操作。本研究將探討初始進料與全回流切換時間點於連續萃取蒸餾啟動程序設計的影響，萃取蒸餾的特點為必須將夾帶劑連續的加入蒸餾塔，以此改變共沸混合物間的相對揮發度，由此可知夾帶劑與共沸混合物間的比例為啟動程序操作的重要變數。
本研究在萃取蒸餾塔的夾帶劑連續進料時間點以及共沸混合物進料時間點設計分別以回流罐溫度以及凝液罐溫度進行決定，並且以三種不同的初始進料策略進行啟動：分別為僅含共沸混合物、僅含夾帶劑、以及同時含夾帶劑與共沸混合物，而在夾帶劑回收塔則考慮兩個不同的全回流切換時機點：回流罐溫度以及凝液罐溫度，因此總共有六種情況在本研究中呈現。
結果顯示，連續萃取蒸餾啟動的最佳策略為初始進料僅注入夾帶劑於凝液罐以及夾帶劑回收塔選擇以凝液罐溫度做為全回流切換點。此策略可避免凝液罐液位的劇烈變化，與初始進料僅注入共沸混合物策略相比可節省18%的能耗以及17%的浪費量，並且擁有最短的啟動完成時間。

In this study, the initial charge and reflux switch point in the extractive distillation is investigated. The start-up operation of an extractive distillation is different from the conventional distillation. The entrainer must be continuously fed into the column to change the relative volatility of the azeotrope mixture. Therefore, keeping the proportion of the azeotrope mixture and the entrainer in the extractive column is the main purpose in the start-up operation.
The feeding time operation of entrainer and azeotrope is required to be considered here. The entrainer is fed when the temperature of drum reaches the nominal value. The azeotrope mixture is fed based on the sump temperature condition. In this work, three kind of the initial charge in the extractive distillation: azeotrope mixture only, the azeotrope mixture and entrainer and entrainer only. And two different selections of the switch point in the recycle column; drum and sump, are investigated. So, in total, there are six scenarios implemented in this study.
The result shows that the best strategy is the initial charge contained entrainer only and the selection of reflux switch point based on sump temperature in the recovery column. It can avoid the dramatic change in the sump of extractive column. The result compared with the initial charge contained azeotrope mixture only shows 17% improvement in the off-spec product and 18% improvement in the reboiler duty.

中華民國經濟部能源局2015年能源查核年報“http://emis.erl.itri.org.tw/_upload/_admin/ecpaper/324/file/2015%E8%A3%BD%E9%80%A0%E6%A5%AD%E8%83%BD%E6%BA%90%E6%9F%A5%E6%A0%B8%E5%B9%B4%E5%A0%B1.pdf”
陳姿伶，“應用模擬退火法進行普通蒸餾程序最適啟動研究”，碩士論文，國立台灣科技大學，民國一百零三年七月
洪有信，“醋酸甲酯與醋酸丁酯反應蒸餾程序最適啟動策略”，碩士論文，國立台灣科技大學，民國一百零四年十一月
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