US3742708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for improving the operation under partial loads of a steam gas plant including a gas turbine and a steam turbine with a steam generator at the downstream end
Assignee: Stein Industrie SA
•
Filing: 1970-05-14
•
Granted: 1973-07-03
•
Expires: 1990-05-14
Abstract
Abstract A steam gas plant comprising a gas turbine, a steam generator with burners fed by the exhaust gases of the gas turbine a steam turbine fed by the steam generator wherein steam is extracted at various points of the steam turbine to feed a deaerator receiving water from water heaters and returning the water to the steam generator, the extracted steam being fed into the deaerator through channels controlled by nonreturn valves and, in at least one of such channels a gate controlled by the pressure prevailing in the deaerator so as to maintain the pressure substantially constant.
Inventors
- 👤 J Vidal
- 👤 J Parisot
- 👤 P Lugand
- 👤 J Lemoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:20
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/34; F01K7/40; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/103; F01K23/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
In a method for operating a steam gas plant including a gas turbine, a steam turbine with a steam generator at the downstream end, a deaerator and heat exchangers including at least one water heater and at least one economizer feeding water into said deaerator, the steps consisting in extracting steam from a plurality of different points of said steam turbine and feeding said extracted steam to said deaerator, the extraction of said steam being controlled by the pressure in said deaerator thereby to maintain said pressure in said deaerator substantially constant for all loads on the steam turbine.
Claim 2
Dependent Claim
99 words
In a method for operating a steam gas plant including a gas turbine, a steam turbine with a steam generator at the downstream end, a deaerator and heat exchangers including at least one water heater and at least one economizer feeding water into said deaerator, the steps consisting in extracting steam from a plurality of different points of said steam turbine and feeding said extracted steam to said deaerator, the extraction of said steam being controlled by the pressure in said deaerator thereby to maintain said pressure in said deaerator substantially constant for all loads on the steam turbine.
Claim 3
Dependent Claim
132 words
In a steam gas plant including at least one gas turbine, at least one steam generator with burners fed by the exhaust of said gas turbine, at least one steam turbine fed by the steam of said steam generator and heat exchangers including at least one water heater and at least one economizer for the water feeding said steam generator, the provision of a deaerator located between said heat exchangers and said steam generator, a plurality of extracting channels adapted to feed said deaerator with steam from a plurality of different points of said steam turbine, a non-return valve in each of said channels, and a gate inserted in at least one of said channels and controlled by the pressure in said deaerator to maintain a substantially constant pressure in said deaerator.
Claim 4
Dependent Claim
132 words
In a steam gas plant including at least one gas turbine, at least one steam generator with burners fed by the exhaust of said gas turbine, at least one steam turbine fed by the steam of said steam generator and heat exchangers including at least one water heater and at least one economizer for the water feeding said steam generator, the provision of a deaerator located between said heat exchangers and said steam generator, a plurality of extracting channels adapted to feed said deaerator with steam from a plurality of different points of said steam turbine, a non-return valve in each of said channels, and a gate inserted in at least one of said channels and controlled by the pressure in said deaerator to maintain a substantially constant pressure in said deaerator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |