化工进展2016，Vol.35Issue(4)：1062-1067,6.DOI:10.16085/j.issn.1000-6613.2016.04.015
基于换热网络集成的二甲苯分离精馏塔参数优化
Distillation parameters optimization based on heat exchanger network integration of xylene separation process
摘要
Abstract
Distillation is an important energy-consuming device of chemical process. Temperature variation of its products affects integration of heat exchange network. For the xylene separation process,the effect of distillation column’s operating pressure was studied in this work. When the pressure of column DA604 increased to 170kPa and 230kPa,respectively,the composite curve was constructed and used to analyze variation of the pinch and minimum utility consumption. When the pressure increased from 110kPa to 170kPa,the pinch kept unchanged; heating utility decreased by 1948.5kW,while cooling utility increased by 1765.0kW. When the pressure increased from 110kPa to 230kPa,coolinging utility increased by 4964.1kW,while heating utility decreased by 8172.4kW. Namely,the heat demands can be saved and recovered heat by 6223.9kW. The results were the same with those calculated by the pinch analysis method. So when increasing the pressure of a distillation column whose top and bottom products are both sources,heating utility will decrease while cooling utility will increase. It is beneficial for energy saving of the system.关键词
精馏/换热网络/集成/夹点Key words
distillation/heat exchange network/integration/pinch分类
化学化工引用本文复制引用
张迪,刘桂莲..基于换热网络集成的二甲苯分离精馏塔参数优化[J].化工进展,2016,35(4):1062-1067,6.基金项目
国家自然科学基金项目（21476180）。 （）
