基于分割式热泵的2-甲氧基乙醇-水精馏工艺模拟  

Simulation of separation for 2-methoxyethanol-water system by separate heat pump distillation

作　　者：杨德明[1] 王杨[1] 廖巧[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《化学工程》2012年第5期1-5,共5页Chemical Engineering(China)

摘　　要：基于2-甲氧基乙醇-水体系的共沸特性,应用分割式热泵精馏用于该体系的分离。采用UNIQUAC方程计算该体系的相平衡数据,并利用实验数据对UNIQUAC方程中的二元交互作用参数进行修正。利用Aspen Plus过程模拟软件中的Radfrac精馏模型和Compr等熵压缩模型,以年总费用最小为目标函数,对提出的分割式热泵精馏工艺进行了模拟与优化,得到了合适的工艺参数,如分割点摩尔分数为x(H2O)=0.17、压缩机进气量为6.16 t/h等关键工艺变量。模拟结果表明,与常规热泵精馏工艺相比,分割式热泵精馏工艺的年总费用可节约34.4%,操作费用可节约36.3%。Separate heat pump distillation was applied to separate 2-methoxyethanol-water system based on the azeotropic characters of the system. The binary interaction parameters of UNIQUAC equation used for calculating vapor-liquid equilibrium data were fitted against the experimental data of 2-methoxyethanol-water system. Based on the minimum annual operation cost, the simulation and optimization for separate heat pump distillation process were performed by Radfrac block and Compr block in Aspen Plus software, and the optimum conditions were determined, such as the breakpoint mole fraction x（ H20） =0.17 and the stream input of compressor 6.16 t/h. The simulation results show that the separate heat pump distillation process ean save total annual cost by 34.4% and the annual operating cost by 36.3% compared with the conventional heat pump distillation.

关 键 词：2-甲氧基乙醇-水 分割式热泵精馏 优化 年总费用 流程模拟 

分 类 号：TQ202[化学工程—有机化工]