摘 要：DME是一種重要的化工原料，具有優良的綜合性質。DME與甲醇按一定比例的混合物是一種理想的液體燃料，可作為城市煤氣和液化氣的代用品．DME還可作為汽油添加劑來生產無鉛汽油，作為潔凈燃料。本設計以10萬噸/年DME生產工藝為目標，通過現有生產工藝的比較，綜合考慮原料來源、流程復雜度、操作條件、設備腐蝕及三廢排放等因素，選擇甲醇氣相催化脫水法作為本次設計的生產工藝路線。針對本生產工藝甲醇無法完全轉化，設計了甲醇回收循環單元，從而提高了原料的利用率；根據選定路線，對整個生產工藝流程的物料及熱量進行了衡算；利用ASPEN PLUS等化工軟件對包括反應器、塔設備及換熱器在內的主要過程設備進行了設計及選型。在此基礎上，按照方便生產、注重安全及經濟合理等原則對廠區布置進行了設計。
關鍵詞：DME；甲醇脫水法；物料及熱量衡算；過程設備設計
英文摘要
Process Design for Manufacturing of Dimethyl Ether with An Annual Production Capacity of 100,000 Tons
Abstract: DME is an important chemical raw material, has excellent comprehensive properties. The mixture of DME and methanol, in suitable proportion, is an ideal liquid fuel, which can be used as a substitute for city gas and liquefied gas. DME aslo can be used as gasoline additives to produce unleaded petrol, and as a clean fuel. A 10 ton/year DME production with the methanol dehydration process has been designed, on the basis of the comparison of the current production process from many aspects, including the source of raw materials, process complexity, operating conditions, corrosion and waste discharge and other factors. A methanol recovery unit has been adopted since the methanol can not be completely transformed, so that the utilization of raw materials was been improved. According to the selected route, the entire production process of materials and energy were accounting. Then the main process equipment, including the reactor, tower equipment and heat exchangers, was designed and selected with the aid of ASPEN PLUS and other chemical software. Finally, the plant layout is designed for convenience, safety and economy.
Keywords: Dimethyl ether; Methanol dehydration; Material and energy balance; Chemical equipment design
