Shortcut Method for Initialization of Dividing Wall Columns and Estimating Pareto-Optimal NQ-curves

15 June 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

In early project stages often no simulation results are available for dividing wall columns. Hence, shortcut methods are used to estimate suitable vapor and liquid splits. In a previous paper it was shown that Vmin diagrams are a suited tool to satisfy this need. However, it has turned out that it shows weaknesses for columns with finite or non-optimal stages. This contribution closes that gap and presents an extended approach to derive suited initial guesses. For this purpose, the original Vmin diagram is combined with a heuristic approach to calculate Pareto-optimal column designs resulting in a stage-adapted Vmin diagram. A comparative study shows that the new approach is a powerful tool to generate reliable guesses for multiple dividing wall column simulations with finite stage numbers.

Keywords

Dividing wall columns
Shortcut
Vmin diagrams
Vapor/Liquid split
Pareto-optimal

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