PURPOSE: To provide a radiant tube burner capable of providing a uniform temperature, improving durability of the tube and restricting nitrogen oxide by a method wherein a part near an extreme end of a burner nozzle of an inner tube is formed with flow-in holes communicating between the inner side and the outer side of the inner tube.
CONSTITUTION: At a slightly rear part of an extreme end of a burner nozzle 5 of an inner tube 9 is formed an air intake passage 7 and an air discharging passage 8, i.e. a plurality of flow-in holes 11, 11,... communicating between the inside part and the outside part of the inner tube 9. Accordingly, a part of combustion gas is sucked into an air suction passage 7 under an action of a negative pressure generated by a flow of combustion air and further mixed with combustion air. Since the combustion air mixed with the combustion air is reignited, nitrogen oxide to be discharged is substantially reduced. A reduction in temperature of the combustion gas is attained through a circulation of combustion gas, a higher temperature part is also eliminated and a uniform temperature can be attained.
ITO MINORU
KAMICHIKA MASATOSHI
TOHO GAS KK
| JPH02178506A | 1990-07-11 | |||
| JPS5783161U | 1982-05-22 |
Next Patent: FLUIDIZED BED TYPE COMBUSTION DEVICE