고온 배기가스의 산소농도가 배기가스이용 확산화염의 $NO_{x}$ 발생에 미치는 영향

The Effect of Oxygen Concentration in Hot Exhaust Gas on the $NO_{x}$ Emission of Diffusion Flame in Exhaust Gas

The present study examined the possibility of $NO_{x}$ reduction in the high temperature industrial furnaces. duct burner of gas turbine cogeneration and two-stage gas turbine combustor. The experimental study was carried out for the diffusion flame of second stage combustor with the variations of oxygen concentration and supplying rate of hot exhaust gas from first stage combustor. It also examined the flammability range and $NO_{x}$ formation of the second stage combustor in which the fuel is supplying into the mixture of oxygen hot exhaust gas from first stage combustor. The results show that the enrichment of oxygen and increase of exhaust gas lead to increase the $NO_{x}$ up to 50 ppm with 23% $O_{2}$ condition.