초록 ▼

Methods and apparatus for combusting fuel-air mixtures while inhibiting the formation of nitrogen oxides are provided. The fuel is discharged from one or more nozzles disposed within a housing, air is caused to flow into the housing whereby it mixes with the fuel and the resulting fuel-air mixture i

Methods and apparatus for combusting fuel-air mixtures while inhibiting the formation of nitrogen oxides are provided. The fuel is discharged from one or more nozzles disposed within a housing, air is caused to flow into the housing whereby it mixes with the fuel and the resulting fuel-air mixture is ignited and combusted. The nozzle or nozzles each include one or more ignition orifices for discharging a first portion of fuel in an ignition zone, one or more primary combustion orifices for discharging a second portion of fuel in a primary combustion zone containing excess air and one or more secondary combustion orifices arranged for discharging the remaining portion of fuel in the form of high velocity jets shielded by slower moving fuel within the downstream of the primary combustion zone whereby the fuel is burned in a secondary combustion zone substantially isolated from direct contact with incoming air by the primary combustion zone.

대표청구항 ▼

In a burner apparatus for combusting a fuel-air mixture wherein fuel is discharged from at least one nozzle disposed within a chamber, air is caused to flow into the chamber whereby it mixes with the fuel and the resulting fuel-air mixture is ignited and combusted, the improvement whereby the format

In a burner apparatus for combusting a fuel-air mixture wherein fuel is discharged from at least one nozzle disposed within a chamber, air is caused to flow into the chamber whereby it mixes with the fuel and the resulting fuel-air mixture is ignited and combusted, the improvement whereby the formation of nitrogen oxides is inhibited comprising: said nozzle having one or more ignition orifices disposed therein positioned to discharge a first portion of said fuel therethrough whereby said fuel mixes with air and provides an ignition zone adjacent said nozzle; one or more primary combustion orifices disposed in said nozzle positioned to discharge a second portion of said fuel therethrough whereby said fuel is distributed in a turbulent pattern which causes said fuel to mix with a rate of air in excess of that required for the stoichiometric burning thereof and to burn in a primary combustion zone; and one or more secondary combustion orifices surrounded by a fuel discharge recess, the secondary orifices and recess being disposed in said nozzle interiorly of said primary combustion orifices and positioned to discharge the remaining portion of said fuel therethrough in the form of high velocity jets of fuel shielded by slower moving fuel whereby said fuel is distributed within and downstream of said primary combustion zone, is mixed with air from said primary combustion zone diluted with combustion products and is burned in a secondary combustion zone substantially isolated from direct contact with incoming air by said primary combustion zone.