Patent US5412938A successfully refreshed from Google Patents.
US5412938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of a gas turbine having premixing and catalytic burners
Assignee: ABB Research Ltd Switzerland
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Filing: 1993-06-29
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Granted: 1995-05-09
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Expires: 2013-06-29
Abstract
Abstract A combination of pre-mixing burners and catalytic supported and preferably gas-operated burners is disposed in a combustion chamber for gas turbines, wherein the main combustion is performed by the pre-mixing burners. The pre-mixing burners and the catalytic burners are embodied to be interchangeable. The catalytic burners are provided with an exhaust gas return, wherein the exhaust gas is preferably taken from the combustion chamber. The inlet for the combustion air for the catalytic burners is embodied as a jet pump, which aspirates the exhaust gas from the combustion chamber.
Inventors
- 👤 Jakob Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
F; F23; F23D; F23D23/00; F23R; F23R3/00; F23R3/40; F23C; F23C2900/00; F23C2900/07002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A combustion chamber for gas turbines, comprising: a plurality of pre-mixing burners for performing a main combustion; and a plurality of catalytically supported gas-operated burners to support the main combustion, each catalytic burner having at least one exhaust gas nozzle to duct exhaust gas directly from the combustion chamber into the catalytic burner and a combustion air inlet formed as a jet pump for aspirating exhaust gas from the combustion chamber through the exhaust gas nozzle into the catalytic burner along with inflowing combustion air.
Claim 2
Dependent Claim
85 words
A combustion chamber for gas turbines, comprising: a plurality of pre-mixing burners for performing a main combustion; and a plurality of catalytically supported gas-operated burners to support the main combustion, each catalytic burner having at least one exhaust gas nozzle to duct exhaust gas directly from the combustion chamber into the catalytic burner and a combustion air inlet formed as a jet pump for aspirating exhaust gas from the combustion chamber through the exhaust gas nozzle into the catalytic burner along with inflowing combustion air.
Claim 3
Dependent Claim
41 words
A combustion chamber in accordance with claim 1, further comprising a plurality of mounting means for individually mounting the pre-mixing burners and the catalytic burners, the pre-mixing burner and the catalytic burners being interchangeably mountable in each of the mounting means.
Claim 4
Dependent Claim
113 words
A combustion chamber for a turbine engine, comprising: a plurality of pre-mixing burners for performing a main combustion; at least one catalytic burner for supporting combustion, each catalytic burner having at least one exhaust gas nozzle to duct exhaust gas directly from the combustion chamber and a combustion air inlet formed as a jet pump for aspirating exhaust gas from the combustion chamber through the exhaust gas nozzle into the catalytic burner mixed with combustion air, the mixed exhaust gas and combustion air being at a temperature sufficient for catalytic combustion; and means for operating the pre-mixing burners as at least one group and means for operating the catalytic burner as a group.
Claim 5
Dependent Claim
113 words
A combustion chamber for a turbine engine, comprising: a plurality of pre-mixing burners for performing a main combustion; at least one catalytic burner for supporting combustion, each catalytic burner having at least one exhaust gas nozzle to duct exhaust gas directly from the combustion chamber and a combustion air inlet formed as a jet pump for aspirating exhaust gas from the combustion chamber through the exhaust gas nozzle into the catalytic burner mixed with combustion air, the mixed exhaust gas and combustion air being at a temperature sufficient for catalytic combustion; and means for operating the pre-mixing burners as at least one group and means for operating the catalytic burner as a group.
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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) | 1998-05-08 | 1998-11-07 | 1999-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-08 | 2002-11-07 | 2003-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-08 | 2006-11-07 | 2007-05-09 | $7700.00 | Window Closed / Lapsed |