Application of Forced Oscillating Combustion to a Radiant Tube Burner : Realization of NO_x Reduction Effect

Abstract

Forced oscillating combustion can reduce nitrogen oxides (NO_x) as described by the previous research. In this paper, we applied this method to two kinds of radiant tube burner in order to confirm the effect of NO_x reduction. Fuel is supplied through a solenoid valve which is made open and shat several times a second with various duty ratios. Flow rate of the fuel, temperature of the furnace and air ratio are switched to investigate the effect. About 30% of NO_x reduction is observed under acceptable performance of combustion and this method is proved to be applicable to many combustion appliances.