基于优化的反应精馏塔简捷设计

基于G ibbs自由能最小原理达到反应和相平衡的假设,提出了一种适用于初步设计的新的设计方法。以甲基叔丁基醚和碳酸二乙酯的反应精馏过程为例,应用Aspen软件模拟,经分析发现,通过改变理论级数和回流比,可得到合理的塔内温度分布,从而使塔底产品组成得到最大程度的提高,为此提出基于优化的设计法:以产品组成最大为目标函数,以回流比、精馏段和提馏段理论板数为决策变量,采用遗传算法进行优化计算。结果表明,2个设计实例均能在保证低能耗的同时得到较高的产品纯度,说明该设计方法可以设计出较好的反应精馏塔。

Optimization-based shortcut design for reactive distillation column

Based on the hypothesis of reaction and phase reaching equilibrium state by minimum Gibbs free energy theory,a new design method for preliminary design was presented.Methyl tert-butyl ether and diethyl carbonate reactive distillation process was taken as examples,and Aspen software was used for modeling.The results show that reasonable temperature distribution can be reached and product purity can be improved farthest by changing the theory stage number and reflux ratio, so the optimization-based design method was put forward: the maximum of product composition was as objective function,reflux ratio,stage number of rectifying and stripping section were as decision variables,and genetic algorithm was applied for optimization calculation.The results indicate that the two design examples can attain high product purity with low energy consumption at the same time,so this proposed approach is better for reactive distillation column design.