F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/52
F23D 14/20 (2006.01) F23C 7/00 (2006.01) F23D 14/12 (2006.01)
Patent
CA 1102229
ABSTRACT OF THE DISCLOSURE A gaseous fuel burner for enhanced flame adherence to a tile sur- face in a furnace, comprising a gas burner tube having a nozzle at its end, including a plurality of radial orifices circumferentially spaced in a transverse plane. A cylindrical combustion air plenum is coaxial with said burner tube, and means are provided to supply combustion air to said plenum at a selected super-atmospheric pressure P1. There is a circular concentric opening in the wall of the plenum and a short length of air tube welded to the opening, which is inserted into an opening in the furnace tile. A plurality of curved vanes are provided, and means to lead air from the pres- surized plenum through the vanes to provide a rapidly spinning air flow which moves helically along the air tube into the tile and into the furnace. The central opening of the tile is flared in an arcuate manner. There is suf- ficient pressure drop between the air plenum at P1 and inside of the air tube P2, after passage through the vanes, of the order of 0.8 W.C., so that a tangential air velocity of as high as 100 feet per second is possible. This rapidly spinning air volume has fuel injected into it under pressure through the radial orifices and flows into the furnace in an expanding spiral flow along the arcuate portion of the tile. Because of the high tangential velocity of the air, gas and flame, the pressure at the face of the tile is low and the flame is held in close contact with the tile causing rapid heat transfer to the tile which then radiates into the furnace area.
322260
Goodnight Hershel E.
Reed Robert D.
Smart & Biggar
Zink (john) Company
LandOfFree
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