Multiple firing rate zone burner and method
AssigneeAlzeta Corporation
InventorsMichael J. Duret, Robert M. Kendall, Frederick E. Moreno
Life of this patent
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Abstract
A gaseous fuel burner and method in which a high-firing rate (blue/non-surface radiant) zone is created between two lower firing rate (red/surface radiant) combustion zones. The method of the invention can be achieved by selective perforation of porous sintered fiber mat burner surfaces to achieve improved burner performance and relatively low NO.sub.x emissions.
Claims17
A gaseous fuel burning method comprising the steps of:
- (a) introducing a premixed fuel-oxidizer mixture to a burner surface;
- (b) creating a first radiant combustion zone on said burner surface at a first firing rate;
- (c) creating a second radiant combustion zone on said burner surface at a second firing rate;
- and
- (d) creating, at a third firing rate higher than said first and second firing rates, a non-surface radiant combustion zone between said first and second radiant combustion zones on said burner surface.
A gaseous fuel burning method comprising the steps of:
- (a) introducing a premixed fuel-oxidizer mixture to a combustion plate arrangement, said combustion plate arrangement including a porous burner plate having a burner surface;
- (b) creating at least two radiant combustion zones at a first firing rate;
- and
- (c) creating a non-surface radiant combustion zone at a second firing rate higher than said first firing rate, said non-surface radiant combustion zone being disposed between said radiant zones.
A gaseous fuel burning method comprising the steps of:
- (a) introducing a premixed fuel-oxidizer mixture to a burner surface of a combustion plate arrangement;
- (b) creating at least two radiant combustion zones on said burner surface at a first firing rate;
- and
- (c) creating a non-surface radiant combustion zone on said burner surface at a second firing rate higher than said first firing rate,
- (d) said non-surface radiant combustion zone being disposed between said radiant zones.
A gaseous fuel burner comprising:
- (a) means for introducing a premixed fuel-oxidizer mixture to the surface of a burner;
- (b) means for creating a first radiant combustion zone on said burner surface at a first firing rate;
- (c) means for creating a second radiant combustion zone on said burner surface at a second firing rate;
- and
- (d) means for creating, at a third firing rate higher than said first and second firing rates on said burner surface, a non-surface radiant combustion zone positioned between said first and second radiant combustion zones.
A gaseous fuel burning method comprising the steps of:
- (a) introducing .a premixed fuel-oxidizer mixture to a burner surface;
- and
- (b) simultaneously creating first, second and third radiant combustion zones on said burner surface such that
- (1) said first and second combustion zones are created at a first firing rate of from 35,000 to 200,000 Btu/hr per ft.sup.2 ;
- and
- (2) said third combustion zone is created at a second firing rate of from 500,000 to 8,000,000 Btu/hr per ft.sup.2 as a non-surface radiant combustion zone.
Dependencies are inferred from the claim text.