PDF (2222K)
摘要
利用Aspen模拟软件，采用NRTL-RK模型，通过对体系气液相平衡特性分析，确定了以二甲基乙酰胺为萃取剂萃取精馏分离异丙醚-异丙醇-正丙醇三元体系，提出了三塔精馏和四塔精馏2种分离方案，以总热负荷最小为目标函数，优化了各精馏塔工艺参数，并比较了2种方案的年度总费用，结果表明四塔流程具有明显的经济优势。
Abstract
The vapor-liquid equilibrium properties of the related system are analyzed by means of Aspen Plus software using the thermodynamic model NRTL-RK.The extractive distillation using dimethyl acetamide as a solvent is select to separate di-isopropyl ether,isopropyl alcohol and n-propyl alcohol ternary mixture.Two separation schemes such as three-column and four-column are suggested.Using the minimum total heat load as a target variable,the best conditions for every distillation column are optimized.The capital investment,operating costs and the total annual costs are calculated for alternative two schemes.The results show that the four-column scheme exhibits significant economic advantages than the three-column scheme.
关键词
异丙醚
/
优化
/
模拟
/
萃取精馏
/
二甲基乙酰胺
/
正丙醇
/
异丙醇
Key words
di-isopropyl ether
/
optimization
/
simulation
/
extractive distillation
/
dimethyl acetamide
/
n-propyl alcohol
/
isopropyl alcohol
Author summay
王桂英(1964-),女,博士,教授,研究方向为化工产品开发与过程模拟,wgy715@163.com
萃取精馏分离异丙醚-异丙醇-正丙醇三元物系模拟与优化[J].
现代化工, 2019, 39(5): 233-236 DOI:10.16606/j.cnki.issn0253-4320.2019.05.052
