环氧乙烷氢甲酯化法生产1,3-丙二醇过程放大与技术经济分析

Process scaleup and techno-economic analysis on hydroesterification of ethylene oxide technology for 1,3-propanediol production

设计环氧乙烷(EO)氢甲酯化法生产1,3丙二醇(PDO)的新工艺,耦合闪蒸并实现过程综合.基于小试结果放大,应用SuperPro Designer仿真软件,模拟年产万吨PDO的全工艺流程.对比2种不同氢甲酯化压力的工艺方案(A方案:7MPa);B方案:4MPa,并进行经济成本分析.模拟结果表明:主要过程数据符合实验结果,工艺设计合理;经济分析显示:高温高压设备占设备购置成本比例较大,原料成本占操作成本88%以上;方案A和方案B的项目总投资分别约10 877万元和10 004万元,税后净利润约2 800万元/a和2 743万元/a,投资收益率分别为29.58%和31.15%.

A new technology of hydroesterification of ethylene oxide（EO） for 1,3-propanediol（PDO） production was designed.Flash procedures were coupled and the process was synthesized.Based on scale-up of laboratory experiments,the SuperPro Designer emluator was applied to simulate the whole process of EO hydroesterification technology for annual 10 000 tons PDO production.Two hydroesterification pressure scenarios（A for 7 MPa and B for 4 MPa） were compared,coupling with costing and economic evaluation on the flowsheeting.Simulation indicates that the process design is reasonable with main process data agreeing with experimental results.The economic analyses show that high temperature and high pressure equipments share large proportion of equipment purchase cost,and the raw material costs are more than 88% of operating cost.The expected returns on investment of scenario A and B reach 29.58% and 31.15% as the after-tax profits are about 28.00 and 27.43 million yuan annually,with the project total investments of approximately 108.77 and 100.04 million yuan.