论文部分内容阅读
针对百万吨级二甲醚生产的要求,建立了甲醇气相脱水制二甲醚的反应动力学模型以及多段原料气冷激的固定床反应器模型,并模拟计算得到甲醇制二甲醚过程中反应器浓度与温度的轴向分布。通过改变操作条件对反应器的参数敏感性进行分析,结果发现,甲醇原料气分为三段进入反应器较为合适,入口气量分配比例最好为7:2:1,此时反应器最高出口温度略高于360℃,各段出口温度大致相当,分布较合理;冷激气温度并非越低越有利,当二段入口温度低于催化剂起活温度就没有意义了,在入口甲醇原料温度为260℃、冷激气温度为140.0℃时,甲醇总转化率和二甲醚产量达到最大值。
In order to meet the requirement of DME production, the reaction kinetic model of methanol dehydration to dimethyl ether and the fixed-bed reactor model of multi-stage feed gas cold shock were established. In the process of methanol-DME simulation Axial distribution of reactor concentration and temperature. By changing the operating parameters of the reactor sensitivity analysis, the results showed that the methanol feed gas into three sections is more appropriate to enter the reactor, the inlet gas distribution ratio is best 7: 2: 1, then the maximum reactor outlet temperature Slightly higher than 360 ℃, the outlet temperature of each section is roughly equivalent and the distribution is more reasonable; the cold exciton temperature is not lower the more favorable, when the second inlet temperature is lower than the catalyst activation temperature is meaningless, inlet methanol feed temperature of 260 ℃, when the cold gas temperature is 140.0 ℃, the total methanol conversion and dimethyl ether production reach the maximum.