於經濟以及環保因素的考量下，將多個單元結合而成的多工程序可以是化工製程強化開發的方向，不僅可縮減原有製程之占地空間與設備成本，也可根據各產品市場需求來決定生產所需產品，由於目標產品轉換過程中，所消耗的能源以及產出之產物皆不具有生產價值，因此如何藉由線上方式進行產品轉換，以減少設備於停車再開俥至目標產物正常生產之時間與物料浪費是相當重要的。
本研究利用模擬退火法進行多工型反應蒸餾程序之最適化，並於控制架構設計上加入訊號選擇器，溫度控制器能夠控制不同目標程序之溫度靈敏板，使得各目標產品之純度能夠有效被控制。
根據自由度分析結果得知，可於產品切換程序中能夠被操控之操作變數為塔頂壓力控制器及兩個溫度控制器。本研究以一次性調整操作變數至目標產物之常態操作值或改變控制器之設定點以進行產品切換策略之設計，提出8種基本策略，並根據此8種基本策略提出2種修正策略─時延超調策略。
一次性改變控制器設定點之操作是一較快速切換程序之方法。與修正策略相比，二氯矽烷切換至單氯矽烷程序可減少切換時間2.8 hr，不合乎規格總產物量減少了18.05 %，冷凝器負載與再沸器能耗約各節省4.16 %與4.2 %。在二氯矽烷與單氯矽烷相互轉換及矽甲烷切換至單氯矽烷時是可行的，單氯矽烷切換至矽甲烷時則因為各控制變數間相互交換作用過大，使系統之動態響應過於激烈，造成系統出現振盪行為，可將部分控制器調整為手動模式，改為調整操作變數，避免相互交換作用影響控制器有較大的作動。

Under the consideration of economy and environment, the multi-tasking process which combines the function of multiple units will be the main direction of chemical process development. It not only reduces the space and the investment costs, but also decide the production plan by market demand. Operating the product transition without shut-down can decrease the waste of raw material.
The silane multi-tasking reactive distillation process is optimized by simulated annealing method. Signal selector is used in the control structure for the multi-tasking reactive distillation process because each case has unique temperature sensitive stages.
According to the analysis of degrees of freedom, the manipulated variables are the tower top pressure controller and two temperature controllers for the product transition.
It takes a long time and might make the process toward another steady-state as the nominal values of the target product are switched simultaneously. When the set point of the target product is switched simultaneously, the transition time might be reduced. Compared with the first delay overshoot strategy, the best results show that the switching time is reduced by 2.8 hours, the total off-specification product is reduced by 18.05%, and the condenser duty and reboiler duty are saved by 4.16% and 4.2%, respectively. Sometimes, due to the interactions among each controller, the process responses would have oscillation behavior. To avoid the interaction between the controllers, some controllers should be switched to manual mode and adjusting the operating variables directly.

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