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二甲醚是一种重要的清洁能源,开发具有竞争力的二甲醚生产工艺已成为世界各国的研究热点,以煤为原料采用一步法生产二甲醚是最具发展前途的方法。管壳型合成反应器具有床层温度平稳、反应温度容易控制、能量利用合理、操作费用低等优点。为此,建立了绝热管壳型固定床一步法合成二甲醚合成反应器的一维数学模型,求得典型工况下的10×104t/a的二甲醚反应器床层内各组分的浓度和温度分布,并模拟计算进口温度(200～210℃)、操作压力(4.6～5.5MPa)对反应器床层温度分布和CO转化率的影响。结果表明,在操作压力4.6～5.5MPa下,提高操作压力能提高产量,入塔温度对反应的影响不大。研究结果可为工业反应器的设计提供依据。
Dimethyl ether (DME) is an important clean energy source. Developing competitive DME production technology has become a hot research topic in many countries in the world. Using DME as a raw material to produce DME in one step is the most promising method. The shell and tube synthesis reactor has the advantages of stable bed temperature, easy reaction temperature control, reasonable energy utilization and low operation cost. Therefore, a one-dimensional mathematical model of one-step synthesis of dimethyl ether synthesis reactor with adiabatic tube-shell fixed bed was established, and the components of 10 × 104t / a dimethyl ether reactor bed under typical conditions were obtained. Concentration and temperature distribution of the reactor bed and the effects of inlet temperature (200 ~ 210 ℃) and operating pressure (4.6 ~ 5.5MPa) on temperature distribution and CO conversion in the reactor bed were simulated. The results show that under the operating pressure of 4.6 ~ 5.5MPa, increasing the operating pressure can increase the yield, and the inlet temperature has little effect on the reaction. The results provide the basis for the design of industrial reactor.