US5321948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel staged premixed dry low NOx combustor
Assignee: General Electric Co
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Filing: 1993-06-14
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Granted: 1994-06-21
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Expires: 2013-06-14
Abstract
Abstract This invention relates to fuel staged premixed dry low NO x gas turbine combustors of the type that are constructed with multiple concentric cylinders to which fuel manifolds are mounted. The cylinders are spaced in a staggered arrangement. Such structures of this type achieve stable combustion over a wide range of fuel-to-air ratios and low flame temperature in the combustor resulting in low emissions of nitrogen oxides (NO x ).
Inventors
- 👤 Gary L. Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:33
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/06; F23R3/08; F23R3/28; F23R3/286; F23R3/34; F23R3/346
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A fuel staged premixed low NO x combustor, said combustor comprised of: a fuel introduction means; an air introduction means; a combustion chamber means; a spark means located substantially within said combustion chamber means; and at least three concentric cylinders located in a staggered arrangement with respect to each other such that said cylinders overlap to create a plurality of fuel and air mixing means of predetermined lengths wherein each of said concentric cylinders is further comprised of a fuel combustion zone of a predetermined distance and wherein said concentric cylinders are further comprised of: a gap of predetermined width between each of said cylinders such that a ratio of said predetermined lengths of said fuel and air mixing means to said gap widths and air mixing means is approximately equal to 10.
Claim 2
Dependent Claim
133 words
A fuel staged premixed low NO x combustor, said combustor comprised of: a fuel introduction means; an air introduction means; a combustion chamber means; a spark means located substantially within said combustion chamber means; and at least three concentric cylinders located in a staggered arrangement with respect to each other such that said cylinders overlap to create a plurality of fuel and air mixing means of predetermined lengths wherein each of said concentric cylinders is further comprised of a fuel combustion zone of a predetermined distance and wherein said concentric cylinders are further comprised of: a gap of predetermined width between each of said cylinders such that a ratio of said predetermined lengths of said fuel and air mixing means to said gap widths and air mixing means is approximately equal to 10.
Claim 3
Dependent Claim
27 words
The combustor, according to claim 1, wherein said fuel introduction means is further comprised of: a fuel header means; a valve means; and a fuel manifold means.
Claim 4
Dependent Claim
26 words
The combustor, according to claim 1, wherein a ratio of said distances of said fuel combustion zones to said gap widths is approximately equal to 10.
Claim 5
Dependent Claim
25 words
The combustor, according to claim 1, wherein fuel and air mixing means are further comprised of: a flow recirculation means located adjacent said spark means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |