Patent US3756029A successfully refreshed from Google Patents.
US3756029A
Expired / Lapsed
US
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Gas/steam turbine plant and a method of operating same
Assignee: Sulzer AG
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Filing: 1971-08-03
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Granted: 1973-09-04
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Expires: 1991-08-03
Abstract
Abstract A second steam turbine is connected to the existing steam turbine to be operated by the exhaust steam of the existing steam turbine. In addition, the exhaust steam from the existing steam turbine is heated by the waste gas of the plant before entering the second turbine. The air supply is also connected over a throttle to the steam line into the pressure vessel to cool the outside of the combustion chamber walls.
Inventors
- 👤 E Aguet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:14
CPC Classifications
F; F01; F01K; F01K21/00; F01K21/04; F01K21/042; F01K23/00; F01K23/02; F01K23/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
216 words
A gas/steam turbine plant comprising a combustion chamber; a gas turbine connected to said combustion chamber to receive combustion gases therefrom and exhaust waste gas; heating elements within said combustion chamber for evaporating and superheating feed water to steam; a first steam turbine connected to said heating elements to receive steam therefrom and to expand the received steam; a second steam turbine connected to said first steam turbine to receive and expand a portion of the expanded steam therein while performing work; a first means between said steam turbines for heating the expanded steam from said first turbine prior to delivery to said second turbine; a second means between said first steam turbine and said combustion chamber for delivering a portion of the expanded steam from said first steam turbine into said combustion chamber exteriorly of said heating elements upstream of said gas turbine, said second means including a regulating valve between said steam turbines for controlling the flow of steam to said second steam turbine; and a temperature sensing means for sensing the temperature of the combustion gases delivered to said gas turbine said sensing means being connected to said regulating valve for adjusting said regulating valve to decrease the flow of steam therethrough in response to an increase in sensed temperature and vice versa.
Claim 2
Dependent Claim
216 words
A gas/steam turbine plant comprising a combustion chamber; a gas turbine connected to said combustion chamber to receive combustion gases therefrom and exhaust waste gas; heating elements within said combustion chamber for evaporating and superheating feed water to steam; a first steam turbine connected to said heating elements to receive steam therefrom and to expand the received steam; a second steam turbine connected to said first steam turbine to receive and expand a portion of the expanded steam therein while performing work; a first means between said steam turbines for heating the expanded steam from said first turbine prior to delivery to said second turbine; a second means between said first steam turbine and said combustion chamber for delivering a portion of the expanded steam from said first steam turbine into said combustion chamber exteriorly of said heating elements upstream of said gas turbine, said second means including a regulating valve between said steam turbines for controlling the flow of steam to said second steam turbine; and a temperature sensing means for sensing the temperature of the combustion gases delivered to said gas turbine said sensing means being connected to said regulating valve for adjusting said regulating valve to decrease the flow of steam therethrough in response to an increase in sensed temperature and vice versa.
Claim 3
Dependent Claim
42 words
A gas/steam plant as set forth in claim 1 wherein said first means is connected downstream of said gas turbine to pass the expanded steam from said first steam turbine in heat exchange relation to the waste gas from said gas turbine.
Claim 4
Dependent Claim
105 words
A gas/steam plant as set forth in claim 1 further comprising a pressure shell enclosing said combustion chamber, a compressor, a burner in said combustion chamber, a delivery line between said compressor and burner for delivering compressed air into said burner, a branch line between said delivery line and said shell for delivering air between said shell and said combustion chamber, and a throttling member in said branch line for controlling the flow of air therethrough and wherein said second means is a line betweEn said first steam turbine and said branch line for delivering steam into said branch line for entry into said shell.
Claim 5
Dependent Claim
197 words
A gas/steam turbine plant comprising a pressure vessel; a combustion chamber within said pressure vessel; a compressor connected with said combustion chamber for delivering air thereto and selectively connected to said pressure vessel for delivering air therein; a gas turbine connected with said combustion chamber to receive combustion gases therefrom; heating elements within said combustion chamber for evaporating and superheating feedwater to steam; a first steam turbine connected to said heating elements to receive steam therefrom and to expand the received steam; first means connecting said first steam turbine with said pressure vessel for delivering steam therein exteriorly of said heating elements; a second steam turbine connected to said first steam turbine to receive and expand a portion of the expanded steam therein while performing work; and second means between said steam turbines for controlling the portion of the expanded steam delivered to said second steam turbine in response to the temperature of the combustion gases received in said gas turbine whereby the portion of expanded steam delivered to said second steam turbine decreases in response to an increase in said temperature while the portion of expanded steam delivered to said pressure vessel increans and vice versa.
Claim 6
Dependent Claim
197 words
A gas/steam turbine plant comprising a pressure vessel; a combustion chamber within said pressure vessel; a compressor connected with said combustion chamber for delivering air thereto and selectively connected to said pressure vessel for delivering air therein; a gas turbine connected with said combustion chamber to receive combustion gases therefrom; heating elements within said combustion chamber for evaporating and superheating feedwater to steam; a first steam turbine connected to said heating elements to receive steam therefrom and to expand the received steam; first means connecting said first steam turbine with said pressure vessel for delivering steam therein exteriorly of said heating elements; a second steam turbine connected to said first steam turbine to receive and expand a portion of the expanded steam therein while performing work; and second means between said steam turbines for controlling the portion of the expanded steam delivered to said second steam turbine in response to the temperature of the combustion gases received in said gas turbine whereby the portion of expanded steam delivered to said second steam turbine decreases in response to an increase in said temperature while the portion of expanded steam delivered to said pressure vessel increans and vice versa.
Claim 7
Dependent Claim
63 words
A gas/steam turbine plant as set forth in claim 4 wherein said second means includes a line means between said steam turbines for passing steam therebetween, a regulating valve in said line means, and a temperature sensor connected between said regulating valve and said gas turbine for sensing said combustion gas temperature and for feeding a signal to said valve in response thereto.
Claim 8
Dependent Claim
49 words
A gas/steam turbine plant as set forth in claim 4 which further comprises a reheater between said steam turbines for receiving the expanded steam and a heat exchanger enclosing said reheater and connected to said gas turbine for receiving waste gas therefrom to heat the steam in said reheater.
Claim 9
Dependent Claim
139 words
A gas steam turbine plant comprising a pressure vessel having an inner surface; a combustion chamber within said pressure vessel; a jacket having an open end positioned between said combustion chamber and said pressure vessel inner surface to partially enclose said combustion chamber; a compressor connected with said combustion chamber for delivering air thereto and selectively connected to said pressure vessel for delivering air therein between said jacket and said pressure vessel inner surface to cool said surface; a gas turbine connected with said combustion chamber to receive combustion gases therefrom; heating elements within said combustion chamber for evaporating and superheating feed water to steam; a steam turbine connected to said heating elements to receive steam therefrom for expansion; and means connecting said steam turbine with said pressure vessel for delivering expanded steam therein exteriorly of said heating elements.
Claim 10
Dependent Claim
139 words
A gas steam turbine plant comprising a pressure vessel having an inner surface; a combustion chamber within said pressure vessel; a jacket having an open end positioned between said combustion chamber and said pressure vessel inner surface to partially enclose said combustion chamber; a compressor connected with said combustion chamber for delivering air thereto and selectively connected to said pressure vessel for delivering air therein between said jacket and said pressure vessel inner surface to cool said surface; a gas turbine connected with said combustion chamber to receive combustion gases therefrom; heating elements within said combustion chamber for evaporating and superheating feed water to steam; a steam turbine connected to said heating elements to receive steam therefrom for expansion; and means connecting said steam turbine with said pressure vessel for delivering expanded steam therein exteriorly of said heating elements.
Claim 11
Dependent Claim
48 words
A gas/steam turbine plant as set forth in claim 7 further comprising a branch line between said compressor and said pressure vessel for delivering air to said pressure vessel and a throttle valve in said branch line for controlling the amount of air delivered to said pressure vessel.
Claim 12
Dependent Claim
25 words
A gas/steam turbine plant as set forth in claim 8 wherein said branch line leads into a space between said pressure vessel and said jacket.
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |