US3744459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensate drain subcooler for moisture separator and reheater
Assignee: General Electric Co
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Filing: 1971-10-12
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Granted: 1973-07-10
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Expires: 1991-10-12
Abstract
Abstract A moisture separator and reheater for separating moisture from wet steam and heating it using condensing-type tube bundles operating under saturated conditions incorporates a special heat exchanger in the condensate drain line to subcool the condensate and prevent instability or cavitation in the drain. The subcooling heat exchanger boils liquid taken from the moisture separator and reheater cycle to perform the condensate cooling.
Inventors
- 👤 W Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:37
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/266
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
In a shell containing a separator and reheater of the type having means separating a first liquid portion from a first lower pressure, lower temperature vapor and also having means for reheating said first vapor, said reheating means comprising a condensing heat exchanger adapted to condense a second higher pressure, higher temperature vapor flowing therethrough into a second condensate portion, the improvement comprising: boiling heat exchanger means connected to pass said first separated liquid portion in heat exchange relationship with said second condensate portion within said shell so as to cause said first liquid portion to boil, thereby subcooling said second condensate portion.
Claim 2
Dependent Claim
103 words
In a shell containing a separator and reheater of the type having means separating a first liquid portion from a first lower pressure, lower temperature vapor and also having means for reheating said first vapor, said reheating means comprising a condensing heat exchanger adapted to condense a second higher pressure, higher temperature vapor flowing therethrough into a second condensate portion, the improvement comprising: boiling heat exchanger means connected to pass said first separated liquid portion in heat exchange relationship with said second condensate portion within said shell so as to cause said first liquid portion to boil, thereby subcooling said second condensate portion.
Claim 3
Dependent Claim
173 words
In a moisture separator and reheater of the type having means separating a first water portion from a first lower pressure, lower temperature wet steam flow, and having at least one condensing tube bundle adapted to reheat said first steam flow by condensing a second higher pressure, higher temperature saturated steam flow passing through said tubes into a second condensate portion, said first steam flow undergoing a pressure drop through the moisture separator, the improvement comprising: a condensate drain conduit for removing said second condensate portion from the reheater tubes, a boiling heat exchanger disposed in heat exchange relationship with said condensate drain conduit and having an inlet and an outlet, first conduit means connected between said heat exchAnger inlet and said first separated water portion, and second conduit means connected between said heat exchanger outlet and a lower pressure region downstream of said reheater, whereby the pressure difference across said moisture separator reheater causes the first separated water portion to flow through the boiling heat exchanger to subcool the second condensate portion.
Claim 4
Dependent Claim
173 words
In a moisture separator and reheater of the type having means separating a first water portion from a first lower pressure, lower temperature wet steam flow, and having at least one condensing tube bundle adapted to reheat said first steam flow by condensing a second higher pressure, higher temperature saturated steam flow passing through said tubes into a second condensate portion, said first steam flow undergoing a pressure drop through the moisture separator, the improvement comprising: a condensate drain conduit for removing said second condensate portion from the reheater tubes, a boiling heat exchanger disposed in heat exchange relationship with said condensate drain conduit and having an inlet and an outlet, first conduit means connected between said heat exchAnger inlet and said first separated water portion, and second conduit means connected between said heat exchanger outlet and a lower pressure region downstream of said reheater, whereby the pressure difference across said moisture separator reheater causes the first separated water portion to flow through the boiling heat exchanger to subcool the second condensate portion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |