Control system for a boiler and method therefor

Details Control system for a boiler and method therefor Control system for a boiler and method therefor

1981-03-12

1982-12-07

Favors, Edward G.

Automatic temperature and humidity regulation

Combined boiler and furnace controlled

110188, 110234, 110341, 122449, 236 15E, 431 76, F23N 108

Patent

active

043622690

ABSTRACT:
A method and system for controlling the combustion of, for example, coal or bark in a stoker boiler or black, liquor in a recovery boiler to provide operation at maximum efficiency. Control loops are provided for primary or undergrate air and secondary or overfire air. The undergrate air control loop is adjusted as a function of carbon dioxide or steam/fuel ratio, and the overfire air control loop is adjusted as a function of carbon monoxide. In addition to carbon monoxide, combustibles and opacity may be used. Air redistribution is also used to minimize combustibles or CO or opacity.

REFERENCES:
patent: 1602092 (1926-10-01), Witz
patent: 3607117 (1971-09-01), Shaw et al.
patent: 3814570 (1974-06-01), Guigues
patent: 4278052 (1981-07-01), Sharp

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