外部反应精馏强化的环氧乙烷制乙二醇工艺模拟及其热泵节能研究  

Simulation of External Coupled Reaction/Separation Processes for the Production of Ethylene Glycol From Ethylene Oxide and Related Energy-Saving Issues in Heat Pumping Systems

作　　者：丁良辉[1] 刘从容[1] 李乾军[1] 薛云波[1] DING Lianghui LIU Congrong LI Qianjun XUE Yunbo(School of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China)

机构地区：[1]南京工程学院环境学院,江苏南京211167

出　　处：《石油学报（石油加工）》2017年第3期563-570,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(21276126);南京工程学院校级科研基金项目(YKJ201326;YKJ201329)资助

摘　　要：基于外部反应精馏强化技术反应与分离更易优化操作的优势,开发了乙二醇的侧反应器/精馏塔新流程,并模拟分析了反应器的操作工况、装置的结构参数对过程经济性能的影响,获得了相关参数的设计指导值。为了降低系统能耗,进一步提出将反应段与提馏段分开运行、反应段引入热泵的系统内部能量集成策略,并考察了其可能最大的节能效果。结果表明,与能量集成前的工艺相比,在构建的节能流程中,原再沸器与冷凝器的热负荷分别降低84.6%与68.9%,可节约年操作费用68.0%,减少年总成本47.9%。The external coupled reaction/separation technology, well known as the distillation column coupled with side reactors （SRC） , in which the reaction and the separation can be operated separately, was innovatively applied in the synthesis of ethylene glycol. The effects of the operation conditions of the reactors and the configuration parameters on the economic performance were investigated to get the suitable values. For further energy saving, we proposed an advanced separate heat pump process （VRC-SRC） , in which the reaction section and the stripping section were operated into two parts with the reaction section assisted by the heat pump installation. The results demonstrated that, compared with the conventional SRC design, the reboiler duty and condenser duty could be decreased by 84. 6 % and 68. 9 % respectively in the optimized VRC-SRC system, leading to a reduction of operation and total costs by 68. 0 % and 47. 9 % respectively.

关 键 词：乙二醇 反应器 反应精馏 热泵 节能 

分 类 号：TQ021.8[化学工程]