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    Design standard：This design has referred to below the national standard and the stipulation.

    a. Production process dangerous material and harmful factor classification and code. （GB/T13816-1992）

    b. Commonly used dangerous chemistry classified standard. （GB13690-1992）

    c. Impressure vessel chemistry medium model harm and explosion hazard degree classification (HGJ43-1991)

    d. Factory fire protection stipulation (GBJ16-1987) 

    e. The sewage synthesis discharges the stipulation (GBJ8978)

    f. The steel pins down the pressure vessel (GB150)

    g. Shell type heat interchanger standard (GB151)

    h. Craft system arrangement of equipment design stipulation (HG20570)

    i. Chemical installment piping arrangement design stipulation (HG/T20549)

    The design is an initial design with an annual output of 120,000 tons of dimethyl ether synthesis technology, and the new technology of gas phase method designed by Southwest Chemical Research and Design Institute has been adopted to prepare dimethyl ether. The process is pided into three sections: methanol vaporization section, dimethyl ether distillation section, stripping section, the catalyst is modified alumina catalyst γ-Al2O3. Is the current domestic and foreign production of dimethyl ether commonly used technology. In the design process, according to the requirements of the design task book to complete the preliminary design of dimethyl ether production, the chemical process design including process design, process calculation and so on. At the same time, including material balance, heat balance, as well as the drawing of its process flow chart, drawing of simple the layout plan and drawing with the control point of the process flow chart; and its main equipment distillation tower, the reactor was calculated Design; selection of auxiliary equipment. In addition to its support facilities. As a result of the lack of experience, it may be not an enough satisfactory design. I hope that the teacher could give guidance.

    Main design standard:

    (1) data of small scale experimental                         

    The conversion rate of hydrolysis reaction     80.0%      

    receiving rate                            99.8%

    Product purity                           99.9%

    (2) standard of the calculation

    Makes the datum by 1 year, according to 100% purity for computation basis.

    Keywords: Dimethyl ether; Distillation; Process design; Reactor

    目  录

    1 概述 1

    1.1 课题的意义 1

    1.2 原料及产品分析 1

    1.2.1 甲醇的性质 1

    1.2.2 二甲醚的性质 2

    1.3 国内外制备二甲醚工艺现状 2

    1.3.1 合成气一步法 2

    1.3.2 甲醇液相催化脱水法 4

    1.3.3 甲醇气相催化脱水法 4

    1.4 设计规模及要求 6

    2 生产工艺条件 7

    2.1 主要操作工艺条件 7

    2.2 反应选择性及转化率 7

    2.3 催化剂的选择 7

    3 生产车间工艺流程设计 8

    3.1 工艺流程简图 8

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