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

F - Mech Eng,Light,Heat,Weapons

22

D

122/27

F22D 7/00 (2006.01) F23N 5/00 (2006.01)

Patent

CA 1167334

ABSTRACT OF THE INVENTION 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.

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