Titrationskurvenabschätzung zur adaptiven pH-Wert-Kontrolle

A method of estimating pH titration curves, for use in the adaptive control of pH in a process, comprises gathering data points which each represent the ratio between a reagent added to the process and a flowrate to the process at a measured pH, storing the data points in a bin system according to t...

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Bibliographische Detailangaben
Hauptverfasser:	LOPARO, KENNETH, CHESTERLAND, OHIO 44026, US, LANE, JOHN DAVID, COLUMBUS, INDIANA 47201, US, SCHEIB, THOMAS J., CHESTERLAND, OHIO 44026, US, GULAIAN, MARTIN, CLEVELAND HEIGHTS, OHIO 44106, US
Format:	Patent
Sprache:	ger
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TESTING
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Beschreibung
Zusammenfassung:	A method of estimating pH titration curves, for use in the adaptive control of pH in a process, comprises gathering data points which each represent the ratio between a reagent added to the process and a flowrate to the process at a measured pH, storing the data points in a bin system according to the measured pH, and using the stored data points to create a model of the titration curve for use in controlling the addition of reagent. Older points are replaced by newer points during the process continuously to update the model. The model is used to generate a gain schedule for operating a PI controller (16) which controls the addition of reagent to the process.