Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1994-08-15
1996-06-04
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62924, 364501, F25J 300
Patent
active
055222242
ABSTRACT:
A cryogenic air separation process generates both an intermediate product and an output product. The intermediate product is produced earlier in time than the output product and variations in output product measurements correlate to earlier variations in intermediate product measurements. The process responds to plural independent variable phenomena. The apparatus includes analyzers for providing measures of the intermediate and output products and the independent variable phenomena. A control processor predicts a measure of the intermediate product, based on the independent variable phenomena and output predicted values therefor. A difference is then determined between the current predicted value for the intermediate product and a measure of the intermediate product, to arrive at a prediction error. The processor is responsive to this intermediate product prediction error to further predict both current and future values of the output product so as to enable control actions to be taken with respect to the output product to control impurities therein.
REFERENCES:
patent: 4349869 (1982-09-01), Prett et al.
patent: 4734114 (1988-03-01), Tasaka et al.
patent: 4784677 (1988-11-01), Al-Chalabi
patent: 4801209 (1989-01-01), Wadlow
patent: 5084081 (1992-01-01), Rohde
patent: 5100447 (1992-03-01), Krishnamurthy et al.
patent: 5313800 (1994-05-01), Howard et al.
"Multivariable Constraint Control Of An Air Separation Unit", S. S. Treiber, J. C. Walker, D. V. Black and G. C. Laurier; Niall O'Connell and Justin Dornaneau, submitted to Chemical Engineering, 1994.
Capossela Ronald C.
O'Brien Cornelius F.
Praxair Technology Inc.
LandOfFree
Model predictive control method for an air-separation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Model predictive control method for an air-separation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Model predictive control method for an air-separation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-376211