PURPOSE: To prevent inhalation of a corrosive nuclide and reduce generation of NOx by shielding flames of a fuel-enriched oxy-fuel inside an envelope of flames of oxygen-enriched oxy-fuel by flames, and confining the shielded flames along a passage having a predetermined cross sectional area.
CONSTITUTION: A flame 47 is comprised of a core 48 of a mixture of fuel- enriched oxy-fuel surrounded by an envelope of an oxygen-enriched mixture. With respect to the dimension of a preliminary combustor 52, the length from a burner surface 44 to an emission outlet of the preliminary combustor 52 is 6 to 48 inches and the diameter of an internal cylinder opening of the preliminary combustor 52 is 2 to 8 inches provided that a burner 40 can perform combustion at 0.25 to 40 million Btu/hour. In this manner, generated flames of the oxy-fuel is confined in the preliminary combustor 52, and the effect of low-temperature bright flames with lowered NOx generation is achieved, to thereby eliminate introduction of poisonous furnace contaminants into the nozzle, the burner block, or the preliminary combustor.
ZUBIGUNIYUU ZURITSUKII
MAHENDORA RAJIYARAMU JIYOSHI
JIEEMUSU KIISU NABOOZU
COMBUSTION TEKU INC
| JPS6229820A | 1987-02-07 | |||
| JPS58221306A | 1983-12-23 | |||
| JPS5222131A | 1977-02-19 | |||
| JP49050845B |
| US3092166A | 1963-06-04 |