| 摘要 |
PROBLEM TO BE SOLVED: To eliminate such a failure that the front end section of a mixed gas introducing tube through which a mixed gas of fuel and exhaust gas is supplied is overheated and deformed by the flame of a pilot burner or the main flame of a primary combustion section, or a backfire is caused in the mixed gas introducing tube when the oxygen concentration in the exhaust gas is high and the flow velocity of the mixed gas is slow. SOLUTION: A low-NOx radiant tube burner which is constituted in such a way that an exhaust gas supply tube 3 is protruded from the rear section of an air supplying tube section 1, and a fuel supply tube 4 is coaxially laid in the tube 3 can constitute a regenerative burner when the burner is paired with another radiant tube burner though the burner is provided with a heat accumulating body. Therefore, the overheating of the exhaust gas supply tube 3, fuel supply tube 4, and heat accumulating body can be prevented by the cooling effect of the exhaust gas supplied for recirculation. |
