变压精馏分离丙酸甲酯-水体系模拟与优化  

Process simulation and optimization of separation of methyl propionate water system by pressure swing distillation

作　　者：兰荣亮 LAN Rongliang(Sinopec Nanjing Engineering Co.,Ltd.,Nanjing 210049,Jiangsu Province,China)

机构地区：[1]中石化南京工程有限公司,江苏南京210049

出　　处：《化学工程》2023年第7期28-32,共5页Chemical Engineering(China)

摘　　要：基于丙酸甲酯和水共沸物的压力敏感特性,以最小年总费用C_(TA)作为经济评价指标,模拟和优化变压精馏分离流程,设计和优化低压塔和高压塔的进料位置、回流比和塔板数。结果显示:低压塔和高压塔的最佳进料位置为第20块和第12块塔盘,回流比为2.2和2.5,塔板数为38块和33块。根据工艺优化参数,对常规变压精馏工艺进行热集成设计,相比之下,C_(TA)减少了338.2×10^(3)美元/a,C_(TA)节约率为31.3%。装置总能耗减少7216.6 kW,节能率为49.5%,可为后续工程设计提供参考。Based on the pressure sensitive characteristics of the methyl propionate-water system,the process of pressure swing distillation was simulated and optimized with the minimum total annual cost C_(TA) as the economic evaluation index.The feed position,reflux ratio and tray numbers of low-pressure column and high-pressure column were designed and optimized.The results show that the optimized feed positions of the low-pressure column and the high-pressure column are the 20th and 12th trays respectively,the optimized reflux ratios are 2.2 and 2.5 respectively,and the optimized number of trays are 38 and 33 respectively.Based on the process optimization results,the conventional pressure swing distillation process is designed for heat integration.Compared with the C_(TA) and energy consumption of the conventional pressure swing distillation process,the C_(TA) is reduced by 338.2×10^(3) dollars/a,the C_(TA) saving rate is 31.3%.The total energy consumption of the process is reduced by 7216.6 kW,and the energy saving rate is 49.5%,which can provide reference for subsequent engineering design.

关 键 词：丙酸甲酯-水 变压精馏 模拟与优化 

分 类 号：TQ28[化学工程—有机化工]