Combustion – Process of combustion or burner operation – Controlling or proportioning feed
Patent
1980-11-03
1982-11-23
Yeung, James C.
Combustion
Process of combustion or burner operation
Controlling or proportioning feed
431 76, 236 15E, F23N 300
Patent
active
043603360
ABSTRACT:
A combustion control system which utilizes non-linear parameters for controlling a combustion process with greater efficiency than has heretofore been available is disclosed. According to the method, the quantity of carbon monoxide, unburned hydrocarbons, and/or opacity is measured and compared with a predetermined value for that parameter. Error signals for each parameter are generated and supplied to an error selector which chooses the error signal of the largest magnitude. The error signal is then compensated for the non-linear relationship between the parameter and the amount of excess air supplied to the combustion process. Other operations, including checking the proposed control signal output against one or more constraints are performed, and if satisfactory, an output signal is supplied to a servo-mechanism for controlling the air flow to the combustion process.
REFERENCES:
patent: 3153587 (1964-10-01), Schuerger
patent: 3184686 (1965-05-01), Stanton
patent: 3602487 (1971-08-01), Johnson
patent: 3723047 (1973-03-01), de Livois
patent: 3877636 (1975-04-01), Sato
Computer Control in Process Industries, E. I. Lowe and A. E. Hidden, Peter Peregrinus Ltd., London, 1971, pp. 24-26.
Computer Control of Industrial Processes, E. S. Savas, McGraw-Hill Book Co., 1965, p. 278.
Barrett Lee E.
Econics Corporation
Yeung James C.
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