F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/17, 110/25
F23D 1/00 (2006.01) F22B 31/00 (2006.01) F23C 5/32 (2006.01) F23C 7/02 (2006.01)
Patent
CA 2026455
Abstract of the Disclosure The known boiler furnace combustion system of the type that main burners are disposed on side walls of or at corners of a square-barrel-shaped boiler furnace having a vertical axis, the burner axes are directed tangentially to an imaginary coaxial cylindrical surface, also additional air blow nozzles are disposed in the boiler furnace at a high level than the main burners, so that unburnt fuel left in a reducing atmosphere or a low oxygen concentration atmosphere of a main burner combustion region can be perfectly burnt by air blown through the additional air blow nozzles, is improved. The improvements reside in that the additional air blow nozzles are dis- posed as divided into at least two groups at higher and lower levels, the additional air blow nozzles at the lower level are provided at the corners of the boiler furnace with their axes directed tangentially to a second imaginary coaxial cylindrical surface having a larger diameter than the first imaginary coaxial cylindrical surface, and the additional air blow nozzles at the higher level are pro- vided at the centers of the side wall surfaces of the boiler furnace with their axes directed tangentially to a third imaginary coaxial cylindrical surface having a smaller diameter than the second imaginary coaxial cyl- indrical surface.
Naito Shuzo
Oguri Masaharu
Tokuda Kimishiro
Mitsubishi Jukogyo Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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