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A model‐based control system for a distillation column
Author(s) -
Rhiel Franz Ferdinand,
Krahl Franz
Publication year - 1988
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270110125
Subject(s) - fractionating column , observer (physics) , process engineering , volumetric flow rate , multivariable calculus , distillation , controller (irrigation) , solvent , control system , process control , process (computing) , column (typography) , control theory (sociology) , flow (mathematics) , chemistry , environmental science , control (management) , computer science , control engineering , engineering , chromatography , mathematics , thermodynamics , organic chemistry , mechanical engineering , artificial intelligence , biology , operating system , quantum mechanics , agronomy , physics , connection (principal bundle) , electrical engineering , geometry
A control concept which includes an adaptive multivariable control algorithm and an observer model has been put into practice in the operation of a distillation column which separates water from a solvent. The model yields predictions of solvent concentration in the waste water which forms the top product. Early detection of disturbances permits an adjustment of the process in time. This has resulted in an exceptionally smooth operation of the column, with a drastic reduction in solvent concentration fluctuations, observed with conventional control technology. Since the only measurements required are pressure, temperature and the rate of flow, this control system is largely free from disturbances. In addition to considerably reducing the burden on operating personnel, use of this control system has lowered the costs of waste water treatment, solvent losses, analysis expenditure and energy consumption.