CONTROL OF AIR FLOW IN A BURNER FOR A TANGENTIALLY FIRED BOILER

摘要

A furnace has a central combustion chamber into which burners exhaust a fuel & air mixt. tangentially. Nozzles in each burner direct the fuel into the chamber & a duct connects wind box to the furnace. Partitioning divides the duct into a number of independent passageways(24,34,44) for primary, secondary & swirler air streams. Vanes(28) in the swirler stream impart a rotary movement to the air & a valve (30) in the passageway for the swirler air modulates the air therethrough. The outlet for the swirler air may be an annulus.