Patent US3769942A successfully refreshed from Google Patents.
US3769942A
Expired / Lapsed
US
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Method of regulating the temperature of superheated steam in a steam generator
Assignee: Sulzer AG
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Filing: 1972-01-12
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Granted: 1973-11-06
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Expires: 1992-01-12
Abstract
Abstract The water which is injected into the steam is obtained from the delivery side of the circulating pump. When the pump is inoperative, e.g. at high load, the water is obtained from a point upstream of the feed water preheater. Valves are also provided to regulate the amount of injected water in dependence on the steam temperature.
Inventors
- 👤 J Brehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:45
CPC Classifications
F; F22; F22B; F22B35/00; F22B35/06; F22B35/10; F22B35/104
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A method of regulating the temperature of superheated steam in a steam generator with forced flow of working medium through an evaporator from a feed pump and with superimposed water circulation through the evaporator by means of at least one circulating pump, said method comprising the steps of supplying the working medium to a suction side of said circulating pump and of injecting water obtained from the delivery side of the circulating pump into the superheated steam.
Claim 2
Independent Claim
77 words
A method of regulating the temperature of superheated steam in a steam generator with forced flow of working medium through an evaporator from a feed pump and with superimposed water circulation through the evaporator by means of at least one circulating pump, said method comprising the steps of supplying the working medium to a suction side of said circulating pump and of injecting water obtained from the delivery side of the circulating pump into the superheated steam.
Claim 3
Dependent Claim
55 words
A method as set forth in claim 1 wherein the steam generator includes a feed water preheater up-stream of the evaporator and which further includes the step of injecting water obtained from upstream of the feed water preheater in place of water from the delivery side of the circulating pump when the pump is inoperative.
Claim 4
Dependent Claim
75 words
A steam generator comprising a feed water preheater; a feed pump for delivering feed water to said preheater; an evaporator downstream of said preheater; a circulating pump interconnected between said preheater and said evaporator, said pump having a suction duct for drawing with into said circulating pump and a delivery duct for expelling water to said evaporator; a superheater downstream of said evaporator; and means for injecting water into said superheater from said delivery duct.
Claim 5
Dependent Claim
75 words
A steam generator comprising a feed water preheater; a feed pump for delivering feed water to said preheater; an evaporator downstream of said preheater; a circulating pump interconnected between said preheater and said evaporator, said pump having a suction duct for drawing with into said circulating pump and a delivery duct for expelling water to said evaporator; a superheater downstream of said evaporator; and means for injecting water into said superheater from said delivery duct.
Claim 6
Dependent Claim
36 words
A steam generator as set forth in claim 3 wherein said means includes a duct connected between said delivery duct and said superheater, and a valve in said duct for controlling the flow of water therethrough.
Claim 7
Dependent Claim
38 words
A steam generator as set forth in claim 4 which further comprises a temperature measuring means connected between said superheater and said valve for controlling said valve in response to a measured temperature of steam in said superheater.
Claim 8
Dependent Claim
45 words
A steam generator as set forth in claim 3 which further comprises a duct connected between said preheater and said feed pump and connected to said superheater to deliver feed water thereto, and a valve in said duct for controlling the flow of water therethrough.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |