Boiler cold start using pulverized coal in ignitor burners

Details Boiler cold start using pulverized coal in ignitor burners Boiler cold start using pulverized coal in ignitor burners

F - Mech Eng,Light,Heat,Weapons

23

K

110/31

F23K 1/00 (2006.01)

Patent

CA 1079577

BOILER COLD START USING PULVERIZED COAL IN IGNITOR BURNERS Abstract of the Disclosure: An ignition, warm-up and low-load-stabilization system for furnaces fired by pulverized coal. In conjunction with a system in which pulverized coal is sent directly from a coal mill to a load-bearing nozzle and in which combustion air is brought to the nozzles from an air preheater that uses hot furnace gases to warm the combustion air, ignitor nozzles are provided that are supplied by pipes bearing coal from which the drying air has been separated. Combustion air for the ignitor nozzles is heated by an independent heat source that heats the combustion air or a portion thereof to a temperature higher than that of the air supplied by the air preheater. Such a coal-fired ignitor burner can replace oil or gas-fired ignitors and warm-up guns and thereby reduce the amount of oil or gas used in ignition, warm-up, and low-load stabilization.

299030

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