文献类型：期刊文献

中文题名：“切点系统”最小回流比的改进算法

英文题名：Minimum Reflux Ratio for "Tangent System" Distillationby Rigorous Calculation

作者：陈士煌[1];倪进方[1]

机构：[1]华东化工学院联合反应工程研究所

年份：1991

卷号：42

期号：2

起止页码：236

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：精馏塔;最小回流比;改进算法

摘要：本文研究了精馏塔在操作线与平衡面相切时的特性.鉴于已发表的各种计算多元精馏最小回流比的方法不能得到“切点恒浓区系统”的“真实”最小回流比,作者在Chien法的基础上,采用抛物线插值方法计算操作线和平衡面相切的恒浓区条件,解决了上述问题.计算结果表明其精度与物性模型的精度相同.
This paper aims at developing a rigorous method for determining minimum reflux ratio in the distillation of 'tangent systems' which are defined as those with concave VLE curves. Two pinch zones in the rectifying or stripping section may be obtained with previously published models when different initial values are chosen. This behavior naturally leads to the fact that the calculated minimum reflux ratio could be lower than the 'real 'one. On the basis of Chien's method, the authors used parabolic interpolation to acquire the maximum condensor in the two pinch zones and then find out the 'real' minimum reflux ratio. The results were verified and showed adequate precision. The algorithm presented in this paper can be used not only for tangent systems, but also for conventional distillation systems.