摘   要:此次畢業設計根據指導老師提供的畢業設計任務書，在老師的指導下對外文相關文獻進行了翻譯，編寫了文獻綜述，進行了工藝流程圖的繪制，然后進行工藝物料衡算；根據確定的工藝流程、物料衡算及熱量估算，進行所有工藝設備的計算及選型，包括反應釜、精餾塔及附屬的預熱器、再沸器、冷凝器、冷卻器及儲罐與泵的選擇；進行了物料流程圖、帶控制點工藝流程圖、設備布置圖的繪制，根據選擇的設備材質及規格以及物料衡算的結果，對此次設計進行了投資估算和簡單的經濟分析。根據設計中涉及的各種物質組分的物化性質，對安全和環保提出了切實的要求。最終進行了匯總，編寫了與此次設計相關的設計工藝計算書和設計說明書。

關鍵字：2,4-二氯甲苯; PCT; 物料衡算

Abstract

The graduation project was on the basis of the design assignment provided by the teacher. So I translated the foreign literature after discussing with my tutor in my college,  prepared a literature review, designed the technical process, and then,made the material balance. According to the determined process, material balance and heat estimate, all calculations and selection of the process equipment (including the selection of the reactor, distillation column , ancillary preheater, reboiler, condenser, cooler ,storage tank and pump) were completed. The material flow, the process flow chart with control points and the equipment layout were drawn. Depended on the selection of equipment materials and specifications, and the result of material balance, conducted the investment estimate and a simple economic analysis. Finally, the design technology calculation and the design specification were done.

Key words：2,4-dichlorotoluene;4-Chlorotoluene;material balance