초록 ▼

The flame temperature of a fluid fuel fired burner (10) is reduced by mixing flue gas (35) with the combustion air supply (34) before introduction of the fuel and combustion take place. The NOX produced by the process of combustion is thereby reduced. The flue gas (35) may also be induced from the f

The flame temperature of a fluid fuel fired burner (10) is reduced by mixing flue gas (35) with the combustion air supply (34) before introduction of the fuel and combustion take place. The NOX produced by the process of combustion is thereby reduced. The flue gas (35) may also be induced from the furnace remote from the flame zone of the burner (10) such that the flame is not disturbed. A venturi (21) may be used to induce the flue gas (35) from the furnace.

대표청구항 ▼

A fluid fuel fired burner comprising a primary combustion air supply passage, a flame zone located downstream of said primary combustion air supply passage for receiving combustion air therefrom, means for introducing flue gas to said primary combustion air supply passage, means for supplying fuel t

A fluid fuel fired burner comprising a primary combustion air supply passage, a flame zone located downstream of said primary combustion air supply passage for receiving combustion air therefrom, means for introducing flue gas to said primary combustion air supply passage, means for supplying fuel to said combustion air, a swirler located downstream of said flue-gas introduction means and upstream of said flame zone for stabilising a flame therein and for mixing said flue gas and combustion air passing therethrough, a venturi located in said primary combustion air supply passage upstream of said swirler for inducing flue gas into said primary combustion air supply passage, wherein said flue-gas introduction means comprises at least one flue-gas supply passage communicating with said venturi and having a flue-gas inlet remote from said flame zone, and a spreader plate located adjacent said flame zone for defining said flue-gas inlet remote from said flame zone whereby the flue gas induced to flow into said primary combustion air-supply passage does not disturb the stability of said flame.