基于Aspen Plus的草酸二甲酯加氢工段工艺参数优化

Simulation and optimization of DMO hydrogenation section based on Aspen Plus

针对CO气相催化偶联制草酸二甲酯(DMO)-草酸酯加氢合成乙二醇(EG)的生产新工艺,应用Aspen Plus软件,在物性常数估算、模型建立的基础上,考察理论板数、进料板位置和回流比等对DMO加氢工段主要工艺单元装置EG精制塔T-204的分离效果的影响,并一步进行了加氢工段全流程模拟。结果表明,T-204优化后的总理论板数、进料板位置、塔顶蒸发速率和回流比分别为25、7、40.95 kmol/h和3.1。全流程模拟显示,15 183.36 kmol/h的H2、189.79 kmol/h的DMO可生产9 980.27 kg/h EG,同时反应放出的热量得以有效利用。

Abstraet：This paper is response to a novel non-petroleum technology,dimethyl oxalate（DMO） by vapor phase catalytic coupling reaction of CO-ethylene glycol（EG） by hydrogenation synthesis of oxalate.The paper introduces an investigation into the influence of the process parameters,including number of theoretical stages,location of feed stage,and reflux ratio on the separation effect of DMO hydrogenation section main process unit device,EG distillation tower T-204,based on estimation of physical parameters and modeling and using Aspen Plus software,and describes the simulation and optimization of the whole process for production of dimethyl oxalate（DMO） hydrogenation section.The results show that T-204 optimization is followed by 25,7,40.95 kmol/h and 3.1 respectively in the suitable numbers of theoretical stages,location of feed stage,mass flow of distillate and reflux ratio.The whole process simulation suggests that 15 183.36 kmol/h H2,189.79 kmol/h DMO could produce 9 980.27 kg/h EG,accompanied by an effective use of heat released by reaction.