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运用Aspen Plus流程模拟系统,采用ElectrolyteNRTL和NRTL相结合的物性方法,利用氯丙醇皂化和环氧丙烷水解反应动力学方程,考虑了管道和皂化塔内的反应,实现了对某环氧丙烷装置的皂化过程的模拟。为了使环氧丙烷生产装置的生产能力由5万吨/年扩大到7.5万吨/年,提出了皂化混合器、换热器和皂化塔的改造方案。各项参数指标和生产装置生产实际数据的相对误差在3%以内,表明模拟中选用的单元操作模型及物性方法准确可靠的;并对扩产后的换热器和塔设备能力进行了核算,结果表明,能够满足年产7.5万吨环氧丙烷的要求,为环氧丙烷生产的扩产改造提供依据。
Using the Aspen Plus process simulation system, a physical method combining ElectrolyteNRTL and NRTL was used. Based on the saponification of chloropropanol and the kinetic equation of propylene oxide hydrolysis reaction, the reactions in the pipeline and saponification tower were taken into consideration. Saponification process simulation. In order to expand the production capacity of the propylene oxide plant from 50,000 tons / year to 75,000 tons / year, a savage mixer, a heat exchanger and a saponification tower reforming plan have been proposed. The relative error between each parameter index and actual production data of the production device is less than 3%, which shows that the unit operation model and physical property method used in the simulation are accurate and reliable. The capacity of the expanded heat exchanger and tower equipment is calculated, The results show that it can meet the requirement of producing 75,000 tons of propylene oxide annually and provide the basis for the expansion and reform of propylene oxide production.