Methodology for pH titration curve estimation for adaptive contr

Details Methodology for pH titration curve estimation for adaptive contr Methodology for pH titration curve estimation for adaptive contr

1990-05-21

1992-07-21

Teska, Kevin J.

Boots, shoes, and leggings

364500, 436 52, G06F 1546

Patent

active

051329166

ABSTRACT:
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 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 to continuously update the model. The model was used to generate a gain schedule for operating a PI controller that is used in adding a reagent to the process.

REFERENCES:
patent: 3730685 (1973-05-01), Prohaska
patent: 3769178 (1973-10-01), Rothermel, Jr.
patent: 4053743 (1977-10-01), Niemi
patent: 4203156 (1980-05-01), Ishikawa
patent: 4239493 (1980-12-01), Niemi et al.
patent: 4302299 (1981-11-01), Ishikawa
patent: 4907167 (1990-03-01), Skeirik
patent: 4975865 (1990-12-01), Carrette et al.

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