| 摘要 |
PURPOSE:To provide a tube burner having a mean distribution of temperature, without generating nitrogen oxide and the like and capable of adjusting a wide range of combustion load by a method wherein a combustion catalyst is arranged between an inner pipe and an outer cylinder and mixed fluid of fuel and air can be flowed to the combustion catalyst through the inner pipe. CONSTITUTION:A tube burner is comprised of an outer dispersion pipe 4a concentrically arranged within an outer cylinder 2 with one end closed, a cylindrical combustion catalyst 3 arranged concentrically with the dispersion pipe 4a through an annular buffle 11a, a fuel nozzle 5, an air discharging and supplying hole 27, a mixing unit 6 of fuel 13 and air 14, a gas outlet port 28 and an ignition unit 7 and the like. The fuel 13 and the air 14 are mixed in a mixing device 6 and then discharged from a small hole 12 of the dispersion pipe 4a to the combustion catalyst 3. The outer cylinder 2 is heated by heat generated under a contact combustion reaction and then the surrounding heated substance is heated. The discharged combustion gas 30 is thermally recovered by some fins 8 so as to preheat the supplied air 14 and the fuel 13. The mixture injected from the small hole 12 is dispersed into a space between the combustion catalyst 3 and the dispersion pipe 4a until the mixture reaches the combustion catalyst 3. The limitation of an air fuel ratio under the contact combustion reaction is far gentle than a gaseous combustion. |
