| 摘要 |
PURPOSE:To prevent the production of NOx, by a method wherein a fuel jet device for feeding fuel to a premixture flame part, whereto air is fed in excess, and to a diffusion flame part which is short of air is provided to the diffusion flame part which is short of air. CONSTITUTION:A recycling gas jet nozzle 28 is situated between a premixture flame type nozzle 20 and a diffusion flame type nozzle 21. An oil fuel line 24, provided with a fuel atomizer 22 at the forward end thereof, is installed at the inside of the diffusion flame type nozzle 21, and the fuel atomizer 22 is positioned in the vicinity of the outlet of the diffusion flame type nozzle 21. Fuel 27 forms a premixture flame W having a high air ratio, fuel 29 forms a diffusion flame C being short of air, and recycling gas GR is jetted through a jet nozzle 28. As noted above, combustion exhaust gas GR is distributed between the premixture flame W, whereto air is fed in excess, and the diffusion flame C which is short of air, and this permits NOx to be prevented from producing frequently at the boundary between the premixture flame W and the diffusion flame C. |
