化工进展2017，Vol.36Issue(3)：852-862,11.DOI:10.16085/j.issn.1000-6613.2017.03.012
碳酸二甲酯-甲醇共沸体系分离的模拟与控制
Comparison of alternative configurations for separation of dimethyl carbonate-methanol mixture:steady state simulation and dynamic control
摘要
Abstract
Dimethyl carbonate(DMC) is a new kind of industrial product,which has extensively applied in different aspects. Special distillation is required to separate the mixture of DMC and methanol since methanol usually exists in the DMC product. Three special distillation configurations including extractive distillation,azeotropic distillation and pressure swing distillation were proposed to separate the DMC-MeOH azeotrope system. The steady-state simulations of the three processes were established by Aspen Plus,and the optimum parameters of the three processes with minimum energy requirement have been obtained using sensitive analyses. The simulation results showed that energy requirement of extractive distillation accounts for 29.0% of the pressure swing distillation and 30.2% of the azeotropic distillation respectively,which shows a good energy-saving potential. Control of extractive distillation process with minimum energy consumption was investigated using the Aspen Dynamics,and two control structures were proposed. The control structure with fixed reboiler duty/feed rate ratio was proposed based on the basic control structure,and the dynamic simulation results revealed that this control structure can handle feed flow rate and composition disturbances quite effectively.关键词
碳酸二甲酯-甲醇/共沸物/精馏/优化/控制Key words
dimethyl carbonate-methanol/azeotrope/distillation/optimization/control分类
化学化工引用本文复制引用
刘立新,李鲁闽,刘桂丽,何康,孙兰义..碳酸二甲酯-甲醇共沸体系分离的模拟与控制[J].化工进展,2017,36(3):852-862,11.基金项目
山东省自然科学基金(ZR2013EEM024)及山东省高等学校科技计划(J14LA08)项目. （ZR2013EEM024）
