基于热耦精馏的三组分混合烷烃分离工艺  

Separation of Ternary Systems Based on Thermally Coupled Distillation

作　　者：杨德明[1] 王颖[1] 谭建凯 高晓新[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《石油化工》2015年第7期862-866,共5页Petrochemical Technology

摘　　要：采用Aspen Plus化工流程模拟软件,选用RK-Soave方程计算物性数据,以分离过程的年总费用(ATC)最低为目标函数,对侧线精馏热耦工艺、侧线提馏热耦工艺和完全热耦精馏工艺用于三组分混合烷烃的分离进行模拟。模拟结果表明,侧线精馏热耦工艺、侧线提馏热耦工艺和完全热耦精馏工艺分别需要274,293,142块塔板;侧线精馏热耦工艺比侧线提馏热耦工艺塔板少19块,但能耗增加14.98%;完全热耦精馏工艺比侧线提馏热耦工艺的能耗降低24.32%;完全热耦精馏工艺比侧线精馏热耦工艺和侧线提馏热耦工艺的ATC分别减少34.35%和23.08%;完全热耦精馏工艺的塔板数、能耗和ATC最低。Aimed at the minimization of the annual total cost（ATC） for separating ternary alkane mixtures,thermally coupled distillation with side rectifying,thermally coupled distillation with side stripping and fully thermally coupled distillation were simulated and optimized by means of the Aspen Plus software with the RK-Soave equation. The results showed that the three distillation processes needed 274 plates,293 plates and 142 plates,respectively. The thermally coupled distillation with side rectifying saved 19 plates but its energy consumption increased by 14.98% compared with the thermally coupled distillation with side stripping. The fully thermally coupled distillation can reduce energy consumption by 24.32% compared with the thermally coupled distillation with side stripping,and can reduce ATC by 34.35% and 23.08% compared with the thermally coupled distillation with side rectifying and the thermally coupled distillation with side stripping,respectively. So the plate number,energy consumption and ATC of the fully thermally coupled distillation process are the lowest.

关 键 词：混合烷烃 热耦精馏 分离工艺 模拟 能耗 三元物系 

分 类 号：TQ028[化学工程]