萃取蒸馏
有机朗肯循环
共沸物
工艺工程
反应蒸馏
三元运算
工作液
兰金度
工艺设计
环境科学
废物管理
化学
热交换器
蒸馏
余热
过程集成
计算机科学
色谱法
工程类
机械工程
程序设计语言
作者
Liu Ji-yan,Jianlin Yan,Wenshuo Liu,Jie Kong,Yang Wu,Xinnong Li,Lanyi Sun
标识
DOI:10.1016/j.seppur.2022.120512
摘要
It is challenging and inevitable for the separation of ternary azeotropic mixture with multiple azeotropes in wastewater. Previous research proposed a hybrid double column reactive-extractive distillation (DCRED) process to separate ternary azeotropes in wastewater, which inspires the investigation into the reactive-extractive dividing wall column (REDWC) in this study. However, the design and waste heat recovery of REDWC have not been fully studied. To this end, two hybrid distillation processes, the REDWC process and the REDWC with feed preheating (REDWC-FP) process, are developed to separate ethyl acetate/ethanol/water ternary azeotropic mixture. The design parameters of the two hybrid distillation processes are optimized based upon the maximum total annual cost (TAC), CO2 emissions and minimum process route index (PRI) through the multi-objective genetic algorithm (MOGA) considering safety. In view of massive waste heat in the REDWC process, several new configurations combining the REDWC and Organic Rankine cycles (ORCs) are further proposed. The optimal ORC system is determined via MOGA with the annual net profit, ORC thermodynamic efficiency and PRI as objective functions. Compared with the existing DCRED process, the TAC and CO2 emissions of the REDWC process are reduced by 8.15% and 4.49%, respectively. The TACs of the ORC1-REDWC process with working fluid cyclohexane and the ORC2-REDWC process with working fluid benzene are reduced by 27.50% and 26.32%, respectively.
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