LOW NOX BURNER

摘要

PURPOSE: To provide a burner of a flame which is compact and made effective for highly efficient reduction in NOx. CONSTITUTION: A nozzle 1 which jets high temperature air for combustion at a speed by far higher than that of a fuel is arranged parallel with a nozzle 2 for ejecting the fuel while being encircled by a refractory material 3 and an end face 5 on which a jetting port 7 of the fuel nozzle 2 is formed is jutted from an end face 4 where a jetting port 6 of an air nozzle 1 so that a part of a fuel gas is dragged in by a vortex 11 formed with a part of the air for combustion being reversed as flowing along the surface 10 of a step part to form a flame as pilot flame. On the other hand, the air for combustion drags in an exhaust gas before being mixed with the fuel gas so that the fuel is induced to mix into the flow of the air for combustion down from the end face 5 lowering the concentration of oxygen. Thus, intensely directional flame and flow of the fuel gas are formed causing a slow combustion stably.