Patent US3759319A successfully refreshed from Google Patents.
US3759319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing effective scavenging vent steam within heat exchangers which condense vapor inside long tubes
Assignee: Westinghouse Electric Corp
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Filing: 1972-05-01
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Granted: 1973-09-18
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Expires: 1992-05-01
Abstract
Abstract A device for scavenging condensate from long heat exchange tubes by recirculating the steam which is passed through one portion of a U-shaped tube bundle through another portion of the tube bundle and thus reducing the build-up of slugs of liquid in the tubes by increasing the velocity therethrough without reducing the heat transfer surface and also protecting the welds which seal the tubes to the tube sheet from thermal shocks and stresses by incorporating a thermal sleeve in the device which cooperates with the scavenging of condensate from the tube to provide optimum protection.
Inventors
- 👤 P Ritland
- 👤 C Peake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
F; F22; F22G; F22G1/00; F22G1/005; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/266; F28; F28D; F28D7/00; F28D7/06; F28F; F28F19/00; F28F19/002; F28F9/00; F28F9/02; F28F9/0202; Y; Y10; Y10S; Y10S165/00; Y10S165/184; Y10S165/196
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A heat exchanger having a shell, a head, a tube sheet connected to said head and having a plurality of holes, and a plurality of long tubes having their ends secured in the holes disposed in the tube sheet, the head portion having means to divide it into an inlet portion and an outlet portion, the heat exchanger being adapted to heat a first fluid flowing through the shell and over the outer surface of the tube by removing heat from a second fluid which passes through the tubes, a portion of said second fluid changing state from a gas to a liquid, in combination with; a first manifold disposed within the outlet portion of the head, and a second manifold disposed in the inlet portion of the head, means providing fluid communication between said manifolds and each manifold having means for placing the manifold in sealed fluid communication with a plurality of tubes which have their ends associated with the respective portions of the head, and said first manifold having a drain port disposed therein for draining liquid therefrom.
Claim 2
Dependent Claim
180 words
A heat exchanger having a shell, a head, a tube sheet connected to said head and having a plurality of holes, and a plurality of long tubes having their ends secured in the holes disposed in the tube sheet, the head portion having means to divide it into an inlet portion and an outlet portion, the heat exchanger being adapted to heat a first fluid flowing through the shell and over the outer surface of the tube by removing heat from a second fluid which passes through the tubes, a portion of said second fluid changing state from a gas to a liquid, in combination with; a first manifold disposed within the outlet portion of the head, and a second manifold disposed in the inlet portion of the head, means providing fluid communication between said manifolds and each manifold having means for placing the manifold in sealed fluid communication with a plurality of tubes which have their ends associated with the respective portions of the head, and said first manifold having a drain port disposed therein for draining liquid therefrom.
Claim 3
Dependent Claim
34 words
A heat exchanger as set forth in claim 1, wherein the second manifold Is in fluid communication with less than a majority of the tube ends associated with the inlet portion of the head.
Claim 4
Dependent Claim
52 words
A heat exchanger as set forth in claim 1, wherein the tubes are U-shaped and the first manifold is in fluid communication with the tubes contacted by the coolest first fluid and the second manifold is in fluid communication with tubes other than those that are in communication with the first manifold.
Claim 5
Dependent Claim
38 words
A heat exchanger as set forth in claim 1, wherein the means placing the manifold in fluid communication with the ends of the tubes are short tubes extending from the manifolds into the ends of the long tubes.
Claim 6
Dependent Claim
24 words
A heat exchanger as set forth in claim 4 and further comprising a seal between the long tubes and the short tubes extending therein.
Claim 7
Dependent Claim
26 words
A heat exchanger as set forth in claim 4, wherein the short tubes are expanded in the ends of the long tubes forming a seal therebetween.
Claim 8
Dependent Claim
57 words
A heat exchanger as set forth in claim 4, wherein the short tubes have an outer diameter sufficiently smaller than the inner diameter of the long tubes to provide an annular space therebetween and the short tubes are expanded to produce at least one small annular area of contact between the tubes thereby forming a seal therebetween.
Claim 9
Dependent Claim
54 words
A heat exchanger as set forth in claim 4, wherein the short tubes have an outer diameter sufficiently smaller than the inner diameter of the long tubes to produce an annular space therebetween and the short tubes being expanded to form two small annular areas of contact between the tubes thereby forming seals therebetween.
Claim 10
Dependent Claim
49 words
A heat exchanger as set forth in claim 4, wherein each header comprises a second tube sheet generally parallel to the tube sheet of the heat exchanger, the shape of the second tube sheet depending on the arrangement of U-tubed ends which are in fluid communication with the header.
Claim 11
Dependent Claim
21 words
A heat exchanger as set forth in claim 1, wherein the discharge portion of the head has venting means disposed therein.
References Cited (Backward Citations)
US2097602A
Cited
GB844660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |