混合三氯苯精馏节能工艺设计与经济评价  

Energy-saving process design and economic evaluation of mixed trichlorobenzene distillation

作　　者：万德浩 恽一 杨舒壮 杨德明[1] WAN De-hao;YUN Yi;YANG Shu-zhuang;YANG De-ming(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,Jiangsu Province,China)

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》2023年第5期1-7,19,共8页Chemical Engineering(China)

摘　　要：混合三氯苯是1,2,3-三氯苯、1,2,4-三氯苯和1,3,5-三氯苯3种同分异构体的混合物,由于三者的沸点非常接近,因而采用常规精馏方法需要消耗大量的能量。为降低精馏能耗,在常规精馏工艺基础上,采用了双效精馏、热集成精馏和机械蒸汽再压缩(MVR)热泵精馏3种节能精馏工艺用于该物系的分离研究。以年总费用(TAC)和能耗作为分离工艺的评价指标,选用SR-POLAR模型计算体系的热力学数据,对3种节能工艺进行模拟和优化。研究结果表明:与常规四塔精馏工艺相比,优化后的双效精馏、热集成精馏和MVR热泵精馏工艺的TAC分别节约6.84%、18.9%和36.4%,能耗分别减少15.6%、32.7%和83.5%。Trichlorobenzene is a mixture of three isomers which are 1,2,3-trichlorobenzene,1,2,4-trichlorobenzene and 1,3,5-trichlorobenzene.Due to the boiling points of the three components are close to each other,the adoption of the conventional distillation process requires a large amount of energy.To reduce the energy consumption of distillation,three energy-saving distillation processes,double-effect distillation,heat integrated distillation and mechanical vapor recompression(MVR)heat pump distillation,were proposed on basis of conventional distillation process and applied to the separation of the system.Total annual cost(TAC)and energy consumption were taken as evaluation indexes of the separation process,the SR-POLAR model was used to simulate and optimize the three energy-saving processes.The results show that compared with four-column conventional distillation process,TAC of double-effect distillation,heat integration distillation and mechanical vapor recompression(MVR)heat pump distillation can be saved by 6.84%,18.9%and 36.4%,respectively,and energy consumption can be reduced by 15.6%,32.7%and 83.5%,respectively.

关 键 词：三氯苯 节能 双效精馏 热集成 MVR热泵精馏 年总费用 

分 类 号：TQ028[化学工程]