US4254627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam turbine plant
Assignee: BBC BROWN BOVERI and Co Ltd
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Filing: 1979-07-09
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Granted: 1981-03-10
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Expires: 1999-07-09
Abstract
Abstract A steam turbine plant is disclosed having at least one intermediate superheater which is connected to an outlet side of a high-pressure turbine by way of a check valve. A discharge pipe line is connected at one end through a flow-regulating unit to an outlet side of the high-pressure turbine upstream of the check valve and at the other end to a condenser of the plant. The flow-regulating unit is controlled in response to various pressure parameters sensed within the system. The discharge pipe line both improves the idling capability of the plant and reduces the time required to reach operating temperatures from a cold start.
Inventors
- 👤 Helmut Gruber
- 👤 Kurt Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/16; F01K7/22; F01K7/24; F01K13/00; F01K13/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
A steam turbine plant comprising: a steam supply pipe; a first turbine supplied by said steam supply pipe; a first turbine outlet; at least one superheater connected to the turbine outlet; a discharge pipe line joined at a first connection between the high-pressure turbine outlet and the superheater; means for regulating the flow in the discharge pipe line; and control means for opening and closing the means for regulating the flow in said discharge pipe in response to at least one pressure within the steam turbine plant.
Claim 2
Dependent Claim
87 words
A steam turbine plant comprising: a steam supply pipe; a first turbine supplied by said steam supply pipe; a first turbine outlet; at least one superheater connected to the turbine outlet; a discharge pipe line joined at a first connection between the high-pressure turbine outlet and the superheater; means for regulating the flow in the discharge pipe line; and control means for opening and closing the means for regulating the flow in said discharge pipe in response to at least one pressure within the steam turbine plant.
Claim 3
Dependent Claim
20 words
A steam turbine plant as in claim 1 including: a check valve located between the first connection and the superheater.
Claim 4
Dependent Claim
49 words
A steam turbine plant as in claim 2 wherein said control means includes means for sensing the pressure on either side of the check valve so that the control means will close the means for regulating flow in the discharge pipe line when the two pressures are substantially equal.
Claim 5
Dependent Claim
48 words
A steam turbine plant as in claim 3 including: a boiler in the steam supply pipe; and at least one feed water heater connected at one end between the first turbine outlet and the check valve and connected at the other end to the inlet of the boiler.
Claim 6
Dependent Claim
41 words
A steam turbine plant as in claim 4 wherein said control means maintains the means for regulating the flow in the discharge pipe line in a closed condition until a predetermined discharge pressure at the first turbine outlet has been attained.
Claim 7
Dependent Claim
45 words
A steam turbine plant as in claim 3 including: a boiler in the steam supply pipe; at least one feed water heater connected at one end between the check valve and the superheater and connected at the other end to the inlet of the boiler.
Claim 8
Dependent Claim
40 words
A steam turbine as in claim 6 wherein the control means maintains the means for regulating the flow in the discharge pipe line in an open condition until a predetermined discharge pressure at the first turbine outlet has been attained.
Claim 9
Dependent Claim
72 words
A steam turbine as in claim 3 further comprising: a condenser; a second turbine; and first pipe means for connecting the outlet of the superheater to the inlet of the second turbine and second pipe means for connecting the outlet of the superheater to the inlet of the condenser; first means for regulating the flow in the first pipe means; and second means for regulating the flow in the second pipe means.
Claim 10
Dependent Claim
39 words
A steam turbine plant as in claim 1 including a by-pass line connected at one end to the steam supply pipe and connected at the other end to the first turbine outlet on the inlet side of the superheater.
Claim 11
Independent Claim
120 words
A method of operating a steam turbine plant comprising the steps of: supplying steam to a first turbine; conducting steam from an outlet of the first turbine to at least one superheater; discharging the steam from the outlet of the first turbine before the steam reaches the superheater in response to at least one pressure within the steam turbine plant; connecting a check valve upstream of the superheater and downstream of the discharging of the stream from the outlet of the first turbine; sensing the pressure on either side of the check valve; and preventing the discharging of the steam from the outlet of the first turbine when the pressures on either side of the check valve are substantially equal.
Claim 12
Independent Claim
120 words
A method of operating a steam turbine plant comprising the steps of: supplying steam to a first turbine; conducting steam from an outlet of the first turbine to at least one superheater; discharging the steam from the outlet of the first turbine before the steam reaches the superheater in response to at least one pressure within the steam turbine plant; connecting a check valve upstream of the superheater and downstream of the discharging of the stream from the outlet of the first turbine; sensing the pressure on either side of the check valve; and preventing the discharging of the steam from the outlet of the first turbine when the pressures on either side of the check valve are substantially equal.
Claim 13
Dependent Claim
66 words
The method of claim 10 further comprising the steps of: connecting a feed water heater between the first turbine and the check valve; preventing the discharging of the steam from the outlet of the first turbine when starting the steam plant; and allowing the discharging of the steam from the outlet of the first turbine when a predetermined outlet pressure of the first turbine in attained.
Claim 14
Dependent Claim
44 words
The method of claim 11 further comprising the steps of: connecting a generator to an output of the steam turbine plant; and preventing the discharging of the steam from the outlet of the first turbine when a predetermined threshold load value has been attained.
Claim 15
Dependent Claim
65 words
The method of claim 10 further comprising the steps of: connecting a feed water heater between the check valve and the superheater; allowing the discharge of the steam from the outlet of the first turbine when starting the steam plant; and preventing the discharging of the steam from the outlet of the first turbine when a predetermined outlet pressure of the first turbine is attained.
References Cited (Backward Citations)
US3277651A
Cited
US4132076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |