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Intelligent control system for extractive distillation columns

  • Process Systems Engineering, Process Safety
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Abstract

We developed and implemented an intelligent control system to be used in an extractive distillation column that produces anhydrous ethanol using ethylene glycol as solvent. The concept of artificial neural networks (ANN) was used to predict new setpoints after disturbances, and proved to be a fast and feasible solution. The developed control system receives data from temperature, flowrate and composition measurements of the azeotrope feed, and the ANN estimates the new set-points of the controllers to maintain 99.5 mol% of ethanol at the top and less than 0.1mol% at the bottom; feed composition was also estimated using an ANN. All ANN were trained to provide output data corresponding to an optimized operating condition. The results showed that the intelligent control system can predict a new operating condition for any disturbance in the column feed and presented superior performance when compared with the control system without ANN.

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Authors and Affiliations

  1. Chemical Engineering Department, Federal University of Campina Grande, Av. Aprígio Veloso, 882, Campina Grande, PB, 58429-900, Brazil

    Thiago Gonçalves das Neves, Wagner Brandão Ramos, Gilvan Wanderley de Farias Neto & Romildo Pereira Brito

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  1. Thiago Gonçalves das Neves
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  2. Wagner Brandão Ramos
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  3. Gilvan Wanderley de Farias Neto
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  4. Romildo Pereira Brito
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Correspondence to Wagner Brandão Ramos.

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das Neves, T.G., Ramos, W.B., de Farias Neto, G.W. et al. Intelligent control system for extractive distillation columns. Korean J. Chem. Eng. 35, 826–834 (2018). https://doi.org/10.1007/s11814-017-0346-0

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