Modified approach to distillation column control

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Published: Jul 26, 2017
DOI: https://doi.org/10.2298/HEMIND160326028P
Keywords:
distillation column, decentralized controller design, decoupling control, PID control, D-decomposition, simulation

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Saša Lj. Prodanović
University of East Sarajevo, Faculty of Mechanical Engineering, East Sarajevo, Republic of Srpska
Novak N. Nedić
University of Kragujevac, Faculty of Mechanical and Civil Engineering in Kraljevo, Kraljevo
Vojislav Ž. Filipović
University of Kragujevac, Faculty of Mechanical and Civil Engineering in Kraljevo, Kraljevo
Ljubiša M. Dubonjić
University of Kragujevac, Faculty of Mechanical and Civil Engineering in Kraljevo, Kraljevo

Abstract

This paper contains methodology research for forming the control algorithm for a distil­lation column, modeled as TITO (two-input two-output) process. Its modified form was obtained by connecting the two parts, and this combination hasn't been applied for such a industrial plant, until now. These parts include: a simplified decoupler which was first designed and decentralized PID controller obtained using D-decomposition method for such decoupled process. The decoupler was designed in order to make process become diagonal, and parameters of PID controllers are defined for the two SISO (single-input single-output) processes starting from relation between IE (integral error) criterion and integrator gain, taking into account desired response characteristics deriving from tech­nological requirements of controlled plant. Their connecting provides centralized control. Analysis of the processes responses, obtained by the proposed algorithm and their com­par­ison with the results from the literature, were performed after the completion of the simulations. The proposed approach to the centralized controller design, beside its sim­plicity of usage and flexibility in achieving diversity of process dynamic behavior, gives better response characteristics, in comparison with existing control algorithms for distil­lation column in the literature.

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How to Cite
Prodanović, S. L., Nedić, N. N., Filipović, V. Ž., & Dubonjić, L. M. (2017). Modified approach to distillation column control. HEMIJSKA INDUSTRIJA (Chemical Industry), 71(3), 183–193. https://doi.org/10.2298/HEMIND160326028P
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Vol. 71 No. 3 (2017)
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