Systematic exploration of the applicability of the idiomatic vapor balance rule to distillation column consolidation

Shuo Zhang; Yifan Sun; Yiqing Luo; Hongzhe Hou; Xigang Yuan

doi:10.1016/j.cjche.2020.05.018

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Systematic exploration of the applicability of the idiomatic vapor balance rule to distillation column consolidation

Process Systems Engineering and Process Safety | Updated：2026-01-06

- Systematic exploration of the applicability of the idiomatic vapor balance rule to distillation column consolidation
- Chinese Journal of Chemical Engineering Vol. 28, Issue 8, Pages: 2121-2130(2020)
- Affiliations：
  
  1. School of Chemical Engineering and Technology, Tianjin University,Tianjin,China,300350
  2. Chemical Engineering Research Center, Tianjin University,Tianjin,China,300350
  3. State Key Laboratory of Chemical Engineering, Tianjin University,Tianjin,China,300350
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.05.018
  CLC：
- Published：2020
- Accepted：
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Shuo Zhang, Yifan Sun, Yiqing Luo, Hongzhe Hou, Xigang Yuan. Systematic exploration of the applicability of the idiomatic vapor balance rule to distillation column consolidation[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2121-2130.
DOI：

Shuo Zhang, Yifan Sun, Yiqing Luo, Hongzhe Hou, Xigang Yuan. Systematic exploration of the applicability of the idiomatic vapor balance rule to distillation column consolidation[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2121-2130. DOI： 10.1016/j.cjche.2020.05.018.

摘要

Abstract

For

-component distillation (

≥ 3)

consolidation between different column sections is an inevitable manipulation when synthesizing complex distillation configurations. In the consolidation

the idiomatic vapor balance (IVB) rule

in which the larger vapor flowrate in the two columns before consolidation will be chosen as the balanced vapor flowrate at the consolidation point

has been widely used. However

the applicability of the IVB rule has not been verified

which is of essential importance to the accuracy of the distillation configuration synthesis. In the present study

the applicability of the IVB rule to distillation column consolidation was systematically explored by rigorous method for the first time. First

the separation of ideal and non-ideal three-component mixtures with variable compositions was studied

and the optimized configurations before and after consolidation were determined by a rigorous method. The results indicated that for the separation of an ideal mixture

the IVB rule was applicable for the whole composition range

while for the separation of a non-ideal mixture

the IVB rule was only applicable for ver

y limited composition range. Finally

two cases of synthesizing distillation configurations for the separation of non-ideal mixtures were studied to verify the remarkable deviations the IVB rule may cause. The results indicated that the applicability of the shortcut method using the IVB rule to the distillation configuration synthesis depended on the composition of the non-ideal mixture

and a remarkable error might result and the truly optimal configuration might be missed if the IVB rule is applied to a non-ideal mixture.

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