Boiler cold start using pulverized coal in ignitor burners
Patent
·
OSTI ID:5416589
An ignition, warm-up and low-load-stabiliztion system for furnaces fired by pulverized coal is described. 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.
- Assignee:
- Combustion Engineering, Inc.
- Patent Number(s):
- US 4173189
- OSTI ID:
- 5416589
- Country of Publication:
- United States
- Language:
- English
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