低碳化学与化工2026，Vol.51Issue(8)：92-101,10.DOI:10.12434/j.issn.2097-2547.20250251
乙腈-水体系萃取精馏三塔流程的模拟与优化
Simulation and optimization on process of three towers for separation of acetonitrile-water by extraction distillation
摘要
Abstract
Anhydrous acetonitrile is widely used as an organic solvent,while a large amount of acetonitrile waste liquid with high water content is generated during some chemical industrial processes.An extractive distillation pre-dehydration process of three towers is proposed to effectively separate the azeotropic system of acetonitrile-water and reduce energy consumption.In ChemCAD,binary interaction parameters were fitted via the NRTL model to construct a thermally coupled process including a dehydration column,an extractive distillation column,and a solvent recovery column.The system structure was optimized to achieve energy integration.Operating conditions and equipment parameters were optimized to establish a plantwide material-thermal coupling model by coupling excess energy from process streams.The simulation results show that the purity of acetonitrile,water products,and circulating extractant is greater than 99.9%(mass fraction)and the energy consumption of the thermal coupling process is 1535.6 kWh,and the total annual cost is 3.639×106 CNY/a.Compared with the conventional process of three towers,the thermal coupling process declines energy by 33.96%and reduces the total annual cost by 27.25%.关键词
萃取精馏/乙腈-水体系/ChemCAD模拟/热耦合/能耗Key words
extractive distillation/acetonitrile-water/ChemCAD simulation/thermal coupling/energy consumption分类
化学化工引用本文复制引用
张家瑞,王广义,王光永,毛震波,胡文励..乙腈-水体系萃取精馏三塔流程的模拟与优化[J].低碳化学与化工,2026,51(8):92-101,10.基金项目
四川省科技创新苗子工程资助项目(MZGC20240137). （MZGC20240137）
