Combustion – Process of combustion or burner operation – Flame shaping – or distributing components in combustion zone
Patent
1995-11-27
1998-06-30
Yeung, James C.
Combustion
Process of combustion or burner operation
Flame shaping, or distributing components in combustion zone
431 9, 431115, 431181, 431187, F23C 500
Patent
active
057724210
ABSTRACT:
A burner for the combustion of fuel and air in an industrial furnace, for use in connection with preheated combustion air, is provided having an equal number of evenly spaced air jets and fuel jets. The air jets and fuel jets are discharged so that they initially diverge away from one another, but eventually, the fuel jets are entrained by the air jets. During the course of their trajectories, before meeting, the air jets and fuel jets entrain resident furnace gases which results in heavy dilution of the fuel and air before combustion. The dilution causes off-stoichiometric combustion conditions and results in a lower flame temperature. This is similar in effect to external flue gas recirculation. As well, the fuel jets undergo pyrolysis in the course of their trajectories before entrainment occurs. This creates a reducing zone in which the NOx in the resident furnace gases being entrained is reduced, in part, back to molecular nitrogen.
NOx emissions from such a burner are shown to be well below that of conventional burners.
REFERENCES:
patent: 4357134 (1982-11-01), Katsushiga et al.
patent: 4626195 (1986-12-01), Sato et al.
patent: 4797087 (1989-01-01), Gitman
patent: 4945841 (1990-08-01), Nakamachi et al.
patent: 4946382 (1990-08-01), Kobayashi
patent: 5076779 (1991-12-01), Kobayashi
"Development of burners which provide wide and uniform temperature heating with Low NOx" in 1989 International Gas Research Conference, by C. Ikai et al, 1989.
"An experimental investigation of NOx formation in recuperative radiant tube" in 1989 International Gas Research Conference, by Shyam N. Singh et al, 1989.
"Low NOx high temperature burners", by Robert V. Gemmer.
"Proceedings of the 1989 International Gas Research Conference", in 1989 International Gas Research Conference, by Thomas L. Cramer (Ed.), Nov. 1989.
"Application of Low NOx Combustion Technique for Regenerative System", in AFRC/JFRC International Conference on Environmental Control of Combustion Processes, by Naoto Saiki and Kenji Koizumi, 1994.
"Low NOx Combustion Technique for High Temperature Furnace", in AFRC/JFRC International Conference on Environmental Control of Combustion Processes, by Eiji Shigeta et al., 1991.
Becker Henry A.
Besik Ferdinand K.
Rahbar Shahrzad
Sobiesiak Andrzej
Canadian Gas Research Institute
Yeung James C.
LandOfFree
Low nox burner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low nox burner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low nox burner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1852830