US Patent 9188333 Dilute combustion

The invention relates to a method of combustion in a furnace provided with a burner comprising an inlet for oxidizer comprising between 10% and 30% of oxygen and an inlet for fuel terminating in the furnace outside the oxidizer inlet and at a distance therefrom of between 0.3 and 4 times the equivalent diameter of the oxidizer inlet, said oxidizer entering the furnace at a speed of between 10 and 60 m/s. This method permits a significant reduction in nitrogen oxide emissions and is suitable for glass furnaces in particular.