| 摘要 |
<p>PURPOSE: To contrive the remarkable reduction of NOx. CONSTITUTION: A shielding plate 4, provided on the outer periphery of tip end of a fuel pipe 1 inserted into an air pipe 2 and provided with a plurality of slot type air injection units 3, is installed, a cylindrical air stream forming air injection unit 20 is formed at the side of rim of the shielding plate 4 and side fuel injection pipes 5, on which a side fuel injection unit 6, communicated with the fuel pipe 1 and injecting fuel into circumferential direction of the shielding plate 4, is opened, is installed at one side of the plurality of slot type air injecting units 3. Radial direction fuel injection ports 14 are provided at the tip end of the fuel pipe 1 while a disc plate 7 is installed at the upstream side of the fuel injection ports 14. Fuel is injected from the side fuel injection unit 6 into a direction orthogonal to air stream injected out of the slot type air injection units 3 with the flow speed ration of 0.2 or more while injecting air from the cylindrical air stream forming air injection unit 20 to mix and burn them while the fuel of 10-20% of total fuel is injected out of the radial direction fuel injection ports 14 radially as auxiliary fuel to promote the reverse flow as well as the recirculation of the flow of combustion gas in a furnace.</p> |
