| 摘要 |
PURPOSE: To perform the combustion of fuel with slight occurrence of a nitrogen oxide, by putting a combustion exhaust gas/air mixture together with fuel at a higher temperature than ignition temperature thereby forming an oxidized zone, and then, performing the actually flameless and unpulsating oxidation within a fire box here. CONSTITUTION: Preheated air for combustion is mixed with combustion exhaust gas sucked reversely from a fire box 1 at a combustion reflux ratio of r >=2 within the mixture division 1 within the fire box 1 by making the interval between the centers of the openings of adjacent nozzles 4 twice the diameter of the port of the nozzle 4 or over. Then, fuel is introduced into a combustion exhaust gas/air mixture from a fuel supply pipe 13, at the terminal of a mixture division 18. At that time, this combustion exhaust gas/air mixture is kept at a higher temperature than its ignition temperature, and next this fuel exhaust gas/air mixture is put together with fuel to form an oxidizing zone, and in this oxidizing zone 19, the actually flameless and unpulsating oxidation in the fire box 1 is performed. Hereby, the combustion of the fuel by air can be performed wit the slight occurrence of nitrogen oxides. |
