主要设计指标：

（1）数据

水解反应转化率    80.0%

精馏收率          99.8%

产品纯度          99.9%

（2）计算基准

以1年产量100%纯度作计算基准。

关键词：二甲醚；精馏；工艺设计；反应器

The design of dimethyl ether process annual output to 120 tones

Instruction manual:

Dimethyl ether (DME) as an alternative fuel for petroleum and LPG is one of the important chemical products, and is widely concerned at home and abroad. The physical properties of DME are similar to LPG, and dimethyl ether is relatively cheap and can be produced in large quantities; it is expected to be one of the energy sources of the 21st century. Dimethyl ether industrial production process, including three processes are synthesis gas one-step process, methanol gas phase method and methanol liquid phase method. Syngas gas method and methanol method is the main difference between the synthesis of gas directly into dimethyl ether. Synthesis gas one-step industrial technology has not yet matured, and methanol gas phase method is the most economical and reasonable method of production of dimethyl ether.

Due to the methanol's low raw material prices, plenty of supply, the reaction of the advantages of the utilization of raw materials, and gradually become the main method for the production of dimethyl ether. This article is based on methanol to dimethyl ether as raw material for design.

With China's rapid economic development, the growing dependence of the chemical raw materials, chemical raw materials shortage, has become increasingly prominent hinder the bottleneck of China's social and economic development. Therefore, the chemical design duty is more and more heavy. First, in the chemical production, through transporting chemical industry design aspect knowledge and the method, may realize to the chemical factory (workshop) rebuilding and extension, carries on the productivity to the unit operation equipment or the entire installment to demarcate with the technology economic indicator evaluates; carries on the appraisal to the technical process; discovers the weak link and unreasonable phenomenon as well as excavation productive potential and so on. Second, in scientific research, since childhood experimental to experimental enlargement, down to the investment industrial production, all cannot leave the design. Looked from the modern times photochemistry industrial development process that, the research holds the important status day by day. But if we want cause the scientific research achievement to transform the productive forces, namely realizing industrialization, we must carry on the scientific research and design in close integration with new development work and so on craft, new product as well as new equipment. Third, in the capital construction, design is the capital construction most important link, is the ready-made construction basis. From single equipment to complete set installment, from a miniaturized factory (workshop) to large-scale petroleum chemical industry enterprise, they all must first finish the engineering design before construction. If we want to complete a good quality and advanced level chemical industry installment, the important precondition is must have a high level and high grade design. Enhancing the design’s quality and speed is the crucial promoter action to the capital construction enterprise development.

In brief, the chemical design plays an important role in the new factory (workshop or installment) construction, the old factory transformation and the small scale experimental or the medium scale experimental installment. That is, the design is a necessary route for the scientific research achievement transforms for the industrialization big production must pass through the way.

Duty origin:

    This design is slightly tries according to the dimethyl ether scientific research to report and the experimental empirical datum, and has referred to a commercial scale simulation design which the Southwest Chemical Research and Design Institute dimethyl ether production installments does. Its goal is carries on a time of chemical design attempt using the chemical engineering correlation knowledge, and is dimethyl ether industrialization production; the production installment design provides the reference.