US4637212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined hot air turbine and steam power plant
Assignee: Sulzer AG
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Filing: 1986-03-26
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Granted: 1987-01-20
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Expires: 2006-03-26
Abstract
Abstract The hot air exchanger in the steam generator is connected to the outlet of the air compressor and the inlet of the hot air turbine for driving the compressor. A presuperheater in the waste air boiler receives steam from the water-steam separator which, in turn, delivers the steam to the steam turbine for an electricity generator. An air preheater is disposed to preheat the incoming combustion air by means of the flue gases from the steam generator. A branch line from the exhaust air boiler may also use the waste air for preheating the incoming combustion air.
Inventors
- 👤 Emile Aguet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/061; F02; F02C; F02C3/00; F02C3/20; F02C3/205
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
170 words
A combined hot air turbine and steam power plant comprising a steam generator having means for creating a fluidized bed in a combustion zone thereof, a smoke flue for exhausting hot gases, at least one air heat exchanger disposed within the fluidized bed, an evaporator and a superheater; at least one compressor connected to said air heat exchanger to deliver a flow of compressed air thereto; a hot air turbine connected to said air heat exchanger to receive a flow of hot air therefrom and connected to said compressor to drive said compressor; at least one waste heat boiler connected to said turbine to receive hot waste air therefrom and having at least one pre-superheater therein connected to said superheater in said steam generator to deliver a flow of steam thereto; a water-steam separator connected to and between said evaporator and said pre-superheater to deliver a flow of steam from said evaporator to said pre-superheater; and a steam turbine connected to said superheater to receive a flow of steam therefrom.
Claim 2
Dependent Claim
170 words
A combined hot air turbine and steam power plant comprising a steam generator having means for creating a fluidized bed in a combustion zone thereof, a smoke flue for exhausting hot gases, at least one air heat exchanger disposed within the fluidized bed, an evaporator and a superheater; at least one compressor connected to said air heat exchanger to deliver a flow of compressed air thereto; a hot air turbine connected to said air heat exchanger to receive a flow of hot air therefrom and connected to said compressor to drive said compressor; at least one waste heat boiler connected to said turbine to receive hot waste air therefrom and having at least one pre-superheater therein connected to said superheater in said steam generator to deliver a flow of steam thereto; a water-steam separator connected to and between said evaporator and said pre-superheater to deliver a flow of steam from said evaporator to said pre-superheater; and a steam turbine connected to said superheater to receive a flow of steam therefrom.
Claim 3
Dependent Claim
22 words
A plant as set forth in claim 1 wherein said pre-superheater is disposed in the hottest zone of said waste heat boiler.
Claim 4
Dependent Claim
21 words
A plant as set forth in claim 1 which further comprises at least one steam re-superheater disposed in said smoke flue.
Claim 5
Dependent Claim
36 words
A plant as set forth in claim 2 wherein said evaporator is disposed in the fluidized bed and which further comprises a second evaporator in said smoke flue connected to said evaporator in the fluidized bed.
Claim 6
Dependent Claim
59 words
A plant as set forth in claim 1 which further comprises an air preheater having a primary side for 1 receiving a flow of air for delivery to the fluidized bed and a secondary side connected to said smoke flue to receive heated gas and a blower for blowing atmospheric air into said primary side of said air preheater.
Claim 7
Dependent Claim
30 words
A plant as set forth in claim 5 which further comprises means for connecting said waste heat boiler with said blower to deliver a controlled flow of heated air thereto.
Claim 8
Dependent Claim
37 words
A plant as set forth in claim 5 which further comprises an auxiliary combustion chamber between said air preheater and said means for creating the fluidized bed for heating the flow of air to the fluidized bed.
Claim 9
Dependent Claim
47 words
A plant as set forth in claim 1 which further comprises an auxiliary steam turbine selectively coupled to said hot air turbine to drive said hot air turbine and means selectively connecting said superheater to said auxiliary steam turbine to deliver a controlled flow of steam thereto.
Claim 10
Dependent Claim
45 words
A plant as set forth in claim 1 wherein said air compressor is sized to deliver an amount of air to said hot air turbine which is at least twice the stoichiometric quality of air necessary for combustion of fuel delivered to the fluidized bed.
Claim 11
Dependent Claim
29 words
A plant as set forth in claim 1 which further comprises means for a controlled blow-off of compressed air to atmosphere between said compressor and said hot air turbine.
Claim 12
Dependent Claim
169 words
In a combined hot air turbine and steam power plant, the combination comprising a steam generator having means for creating a fluidized bed in a combustion zone thereof, at least one air heat exchanger in the fluidized bed in said combustion zone, an evaporator and a superheater; at least one compressor connected to said air heat exchanger to deliver a flow of compressed air thereto; a hot air turbine connected to said air heat exchanger to receive a flow of hot air therefrom and connected to said compressor to drive said compressor; at least one waste heat boiler connected to said turbine to receive hot waste air therefrom and having at least one pre-superheater therein connected to said superheater in said steam generator to deliver a flow of steam thereto; a water-steam separator connected to and between said evaporator and said pre-superheater to deliver a flow of steam from said evaporator to said pre-superheater; and a steam turbine connected to said superheater to receive a flow of steam therefrom.
Claim 13
Dependent Claim
169 words
In a combined hot air turbine and steam power plant, the combination comprising a steam generator having means for creating a fluidized bed in a combustion zone thereof, at least one air heat exchanger in the fluidized bed in said combustion zone, an evaporator and a superheater; at least one compressor connected to said air heat exchanger to deliver a flow of compressed air thereto; a hot air turbine connected to said air heat exchanger to receive a flow of hot air therefrom and connected to said compressor to drive said compressor; at least one waste heat boiler connected to said turbine to receive hot waste air therefrom and having at least one pre-superheater therein connected to said superheater in said steam generator to deliver a flow of steam thereto; a water-steam separator connected to and between said evaporator and said pre-superheater to deliver a flow of steam from said evaporator to said pre-superheater; and a steam turbine connected to said superheater to receive a flow of steam therefrom.
Claim 14
Dependent Claim
29 words
The combination as set forth in claim 11 wherein said evaporator is disposed in the fluidized bed to convey a flow of working medium therethrough in heat exchange relation.
Claim 15
Dependent Claim
41 words
The combination as set forth in claim 12 which further comprises a second evaporator in said steam generator connected between and to said evaporator in the fluidized bed and said steam separator to convey the working medium to said steam separator.
Claim 16
Dependent Claim
60 words
The combination as set forth in claim 11 which further comprises an air preheater having a primary side for receiving a flow of air for delivery to the fluidized bed and a secondary side connected to said steam generator to receive a flow of heated gas and a blower for delivering air to said primary side of said air preheater.
Claim 17
Dependent Claim
30 words
The combination as set forth in claim 11 which further comprises means for connecting said waste heat boiler with said blower to deliver a controlled flow of heated air thereto.
Claim 18
Dependent Claim
37 words
The combination as set forth in claim 11 which further comprises an auxiliary combustion chamber between said air preheater and said means for creating the fluidized bed for heating the flow of air to the fluidized bed.
Claim 19
Dependent Claim
47 words
The combination as set forth in claim 11 which further comprises an auxiliary steam turbine selectively coupled to said hot air turbine to drive said hot air turbine and means selectively connecting said superheater to said auxiliary steam turbine to deliver a controlled flow of steam thereto.
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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |