US4944148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and a device for cooling of a PFBC power plant after a gas turbine trip
Assignee: ABB Stal AB
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Filing: 1988-12-23
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Granted: 1990-07-31
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Expires: 2008-12-23
Abstract
Abstract A method of discharging heat from a particulate material in a bed (28) of a combustor (12) in the event of an operational disturbance in a PFBC power plant. Gas from the combustor (12) is cooled in a cooling circuit (69) connected to the combustor (12) and is returned to the combustor (12) where it is allowed to pass through the bed (28). A device for carrying out the method comprises a cooling circuit (69), connected to the combustor (12), with a cooler (72) and a compressor or fan (76) which effects gas circulation through the cooling circuit (69) and the combustor (12).
Inventors
- 👤 Lennart Hjalmarsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:27
CPC Classifications
F; F23; F23C; F23C10/00; F23C10/16; F02; F02C; F02C3/00; F02C3/20; F02C3/205; F23C10/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A method of cooling a bed material in a bed of a combustor in the event of an operational disturbance in the turbine unit of a PFBC power plant, including the steps of: cooling the gas leaving the combustor, in a gas cooler located in a separate closed cooling circuit formed by the combustor, the gas cooler, a gas circulator and conduits forming interconnections therebetween; and returning the cooled gas to the combustor.
Claim 2
Independent Claim
73 words
A method of cooling a bed material in a bed of a combustor in the event of an operational disturbance in the turbine unit of a PFBC power plant, including the steps of: cooling the gas leaving the combustor, in a gas cooler located in a separate closed cooling circuit formed by the combustor, the gas cooler, a gas circulator and conduits forming interconnections therebetween; and returning the cooled gas to the combustor.
Claim 3
Dependent Claim
37 words
A method according to claim 1, wherein the cooling circuit is supplied with an inert gas so that the combustion of residual fuel in the bed ceases and the generation of an explosive gas mixture is prevented.
Claim 4
Dependent Claim
36 words
A method according to claim 1, wherein the combustor is supplied with an inert gas so that the combustion of residual fuel in the bed ceases and the generation of an explosive gas mixture is prevented.
References Cited (Backward Citations)
US4306411A
Cited
US4380147A
Cited
EP0063173A1
Cited
US4498286A
Cited
US4498285A
Cited
US4656972A
Cited
US4744212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |