| 摘要 |
PROBLEM TO BE SOLVED: To suppress flame temperature low even in the case of combustion in high temperature air, and hence reduce the amount of exhaustion of NOX. SOLUTION: Fuel gas F jetting into high temperature air A in a furnace body 1 is jetting at a high speed from an inner pipe 3 of a coaxial jetting nozzle 2, and an outer periphery flow O is supplied from an outer pipe 4 of the coaxial jetting nozzle 2 to the surroundings of the fuel gas F to surround same. The jetting fuel gas F is prevented from becoming a flame at once and is produced separated forwardly, and becomes a state where it is mixed and diluted with the surrounding outer peripheral flow O and the high temperature air a until the fuel gas F reaches the flame, and it becomes mild combustion to lower the flame temperature to hereby reduce the amount of exhaust of NOX. |
