| 摘要 |
<p>PURPOSE:To prevent the buring of a burner air nozzle, by a method wherein an air duct and a recycling air duct are connected to an air nozzle of each burner, and exhaust gas is recycled for the purpose of cooling the air nozzle of an inoperative burner. CONSTITUTION:A duct 10 for the air for combustion and a recycling gas duct 16 are connected to an air nozzle 6 of each burner, and dampers 20 and 22 are attached to their respective ducts. Combustion exhaust gas through the outlet of a boiler is recycled to an inoperative burner, the air for combustion is switched through the working of the switch dampers 20 and 22 located at a burner inlet part, and the air nozzle 6 of the burner is cooled by means of only recycling gas to prevent burning of the air nozzle of the burner.</p> |
