LOW NITROGEN OXIDE GENERATING FUEL INJECTION NOZZLE FOR SPREADING WIDELY AUTOMATIZED FUEL IN A SHORT DISTANCE BY DAMPING PRESSURE THROUGH FIRST AND SECOND EXPANDED UNITS AND REDUCING NITROGEN OXIDE BY DECREASING COMBUSTION TEMPERATURE

摘要

PURPOSE: A low nitrogen oxide generating fuel injection nozzle is provided to burn sufficiently fuel even in supplying a small quantity of the air by spreading widely atomized fuel and accordingly to reduce the generation of nitrogen oxide by lowering the temperature of flame. CONSTITUTION: An injection nozzle(1) is disposed in the end of a fuel pipe(3) having a rotating mixer unit for mixing fuel and steam and promoting atomization of the fuel. An inner injection port(4) penetrating the central portion is formed in the center inside the injection nozzle. Plural outer injection ports(6) are arranged annularly around the outline. A first expanded unit(5) of which the section is expanded like a fan shape is formed at the outlet of the inner injection port. A second expanded unit(7) is disposed at the outlet of the outer injection port to combine two or three injection ports. Accordingly, the low nitrogen oxide generating fuel injection nozzle spreads widely and injects the atomized fuel.