BURNER

摘要

PURPOSE:To reduce the amount of NOx, prevent back-fire and make it possible to make complete combustion by giving whirl flows in opposite direction from inner and outer flame hole bodies to a pre-mixing gas and forming a whirl blue flame band of whole primary pre-mixing gas away from the air holes of the flame hole bodies and developing recirculation into exhaust gas pre-mixing gas. CONSTITUTION:Because whole primary pre-mixing gas has its air holes 50 and 54 provided mutually in opposite directions, the whole primary pre-mixing gas is jetted out after giving to combustion chamber 57 opposite whirl flows and forms a separated gap 59 from the inner circumferential wall of outer flame hole body 49, outer circumferential wall of inner flame hole body 53 and the outlets of air holes 50 and 54, and the whole primary pre-mixing gas becomes a rotating blue flame which is annular and of thin film. In the separate gap 39 and a separated gap 60 part of the exhaust gas from the blue flame band 58 mixes into the whole primary pre-mixing gas jetted out from the air holes 50 and 54. As a result temperature rise in the whole primary pre-mixing gas is promoted and circulation action to make more dilute mixture gas is generated and the flame and the sections do not rise in temperature and the amount of NOx is reduced. Further a flame is formed as one rotating flame and there are no back-fire, blowing of flame, etc. and it is possible to achieve complete combustion.