化工进展2017，Vol.36Issue(10)：3619-3624,6.DOI:10.16085/j.issn.1000-6613.2016-2079
双储罐替代恒全回流半连续精馏操作方式的研究
Study on operation mode of vessels-alternated semi-continuous distillation with constant total reflux
摘要
Abstract
The present work proposed a new operation mode named the vessels-alternated semi-continuous distillation with constant total reflux (SCTR).In the new mode,the column was under total reflux all the time with two reflux drums working in turn at both the top and the bottom,respectively.A simulation was conducted by Matlab to study the discharging policy and optimize the operating parameters including the total holdup and distribution of vessels.The optimization was done according to the product yield both of light and heavy components,as well as the amount of total product per unit time (P.I.).Compared with operation mode of constant reflux (CR),SCTR can save the operation time by more than 32％.It took almost the same time to operate compared with CTR with one vessel,but more time than the MVBD with three vessels.The results showed that the SCTR operation was more suitable for separation of binary mixtures with low concentration of light component.But it was advantageous in realizing semicontinuous operation by discharging product and replenishing feed periodically.Experiments with ethanol-propanol system in different feed concentrations (0.2、0.5 and 0.8) were presented,which confirmed the operation feasibility and simplicity of the new operation mode.关键词
分离/设计/计算机模拟Key words
separation/design/computer simulation分类
化学化工引用本文复制引用
李娟,吕灵娟,白鹏,郭翔海..双储罐替代恒全回流半连续精馏操作方式的研究[J].化工进展,2017,36(10):3619-3624,6.基金项目
天津大学自主创新基金(2016XZC-0071)及天津市自然科学基金(16JCYBJC20300)项目. （2016XZC-0071）
