| 摘要 |
PROBLEM TO BE SOLVED: To reduce NOx and size in a low NOx combustion device. SOLUTION: The combustion device is provided with a lean burner port 102 ejecting a lean mixture, a first rich burner port 106 provided adjacently to the lean burner port 102 and ejecting a first rich mixture, and a second rich burner port 109 provided adjacently to the first rich burner port 106 and ejecting a second rich mixture with lower mixture concentration than the first rich burner port 106. The first rich mixture fed from the first burner port 106 is cracked by stable flame of the second burner port 109, generated activation chemical species are fed to a base part of lean flame by diffusion and a high temperature and high reaction area livelily carrying out combustion reaction is formed, and by this, stabilized ultralow NOx and miniaturization are realized even when a high speed lean mixture is fed. |
