Abstract

The research of optimal compromise operation modes of five-column rectification unit, designed for isopropyl benzene extraction from benzene alkylation products by propylene, at variation of feed rate to the head tower is performed. We selected two optimization criteria in the form of productivity by outlet flow from the considered system of columns with the given concentration of isopropylbenzene and energy consumption for creation of steam flow in the columns. We varied feed flow rate to the head-column. Analysis of obtained results of the step-by-step approach for determining the optimal trade-off solution made it possible to establish that the multidimensional function of achieving a trade-off solution for the entire installation is unimodal. This result justifies the application of multidimensional extremum search methods to solve the problem of obtaining the optimal compromise solution. It has been established that the dependences of control variables on the supply flow rate to the head tower are linear when the optimum compromise modes are achieved.

中文翻译：

---

异丙苯生产多塔精馏装置最优折衷模式研究

摘要

研究了丙烯从苯烷基化产物中萃取异丙苯的五塔精馏装置在改变顶塔进料量的情况下的最佳折衷操作模式。我们选择了两个优化标准，即具有给定异丙苯浓度的所考虑的塔系统的出口流量的生​​产率以及塔中产生蒸汽流的能耗。我们改变了头柱的进料流量。对用于确定最佳权衡解决方案的逐步方法所获得的结果的分析使得可以确定实现整个装置的权衡解决方案的多维函数是单峰的。这一结果证明了应用多维极值搜索方法来解决获得最优折衷解的问题是合理的。已经确定，当实现最佳折衷模式时，控制变量对头塔供应流量的依赖性是线性的。