萃取精馏分离异丙醇-水共沸物的模拟及节能  

Simulation and energy savings for separating isopropanol-water mixture by extractive distillation

作　　者：韩东敏[1] 陈艳红[1] HAN Dong-min;CHEN Yan-hong(Department of Chemical Engineering,Shengli College China University of Petroleum,Dongying 257061,Shandong Province,China)

机构地区：[1]中国石油大学胜利学院化学工程学院,山东东营257061

出　　处：《化学工程》2020年第2期69-73,共5页Chemical Engineering(China)

基　　金：山东省高校科技计划项目(J14LC60)。

摘　　要：利用Aspen Plus软件对异丙醇脱水常规萃取精馏流程、带液相侧线抽出萃取精馏流程及带气相侧线抽出萃取精馏流程进行模拟,并以最小年总费用(TAC)为目标对3种工艺进行全局经济优化。结果表明,与常规萃取精馏相比,带液相侧线抽出萃取精馏流程的TAC下降了6.99%,CO2排放量减少7.85%;带气相侧线抽出萃取精馏流程的TAC降低了7.42%,CO2排放量减少9.94%。带气相侧线抽出萃取精馏工艺最优操作参数:T-101塔板数为37,回流比为0.96,萃取剂进料量为8500 kg/h,T-201塔板数为12,回流比为0.2。该研究结果可为异丙醇脱水萃取精馏的设计及节能提供一定的理论依据。For the separation of isopropanol and water,three different extractive distillation processes,including conventional extractive distillation(CED),liquid side-stream extractive distillation(Liquid-SED)and vapor side-stream extractive distillation(vapor-SED),were simulated and optimized by commercial process simulator Aspen Plus.To find the optimal design of the 3 processes,total annual cost(TAC)was used as the objective function to be minimized.The results showed that compared with the CED process,the Liquid-SED process and vapor-SED process had 6.99% and 7.42% reduction in TAC,7.85% and 9.94% reduction in CO2 emission,respectively.The optimal conditions for vapor-SED process were determined:for T-101,theoretical stage number 37 and reflux ratio 0.96;for T-201,theoretical stage number 12 and reflux ratio 0.2;and the flow rate of entrainer 8500 kg/h.The results provided a design reference and theory basis for the industrial design of extractive distillation process to separate isopropanol and water mixture.

关 键 词：萃取精馏 共沸物 ASPEN PLUS 节能 

分 类 号：TQ028.3[化学工程]