萃取精馏分离碳酸二甲酯混合物的模拟研究

Study on Simulation of Separation of DMC Mixture by Extractive Distillation

基于Aspen Plus软件和文献实验数据,利用软件数据回归功能及wilson热力学模块,完成了数据库中组分缺少的相互作用参数回归,获得了模拟所需基础数据,与文献值比较模拟值吻合较好。设计了体系的3塔分离流程,采用严格模拟和灵敏度分析模块完成精馏塔的设计和操作参数的优化,从而获得了纯度达到99.7%的DMC精馏分离流程和操作条件,模拟结果可以用于指导实际过程的分析和设计。

Based on Aspen Plus software and experiment data from literatures,Binary Interaction parameters of components,which were absent in component libratory of Aspen Plus,was calculated by using data regression module and Wilson method of software.Basic thermodynamic data of DMC,methanol and O-xylene were obtained for simulation.The results showed that simulation parameters were accordance with that of literatures data.Extraction separation process of three columns was determined.Rigorous distillation and extraction simulations were finished for design of columns.Sensitivity analysis module was used for parameters optimization of the columns.Optimal separation conditions was obtained for 99.7% purity product of DMC.The simulation results may be used to guide design and analysis of actual plant.