US3867908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross flow baffle for a steam generator
Assignee: Westinghouse Electric Corp
•
Filing: 1973-04-24
•
Granted: 1975-02-25
•
Expires: 1993-04-24
Abstract
Abstract A steam generator having a U-shaped tube bundle and a baffle and tube support which has circulation holes drilled in a selective pattern to promote cross flow across the hot leg of the tube bundle to eliminate chemical hideout and poor flow distribution.
Inventors
- 👤 Wilbur M Byerley
- 👤 Robert R Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:48
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
259 words
A vapor generator comprising a shell portion, a tube bundle having a plurality of tubes disposed within said shell portion, a wrapper disposed within said shell so as to generally enwrap said tube bundle, a tube sheet disposed on one end of the tube bundle a head portion cooperatively associated with said shell and tube sheet, a primary fluid inlet nozzle for supplying primary fluid to the inside of said tube, a secondary fluid inlet nozzle for supplying secondary fluid to the inside of said shell and the outside of said tubes, a baffle disposed parallel to said tube sheet and cooperatively associated with said wrapper so that at least a portion of the secondary fluid sweeps across said tube sheet and flows between an area between said baffle and said tube sheet, said baffle having a plurality of tube holes through which the tubes pass, said holes embracing said tubes and said baffle having a plurality of circulation holes through which at least a portion of the secondary fluid flows, said circulation holes being disposed in a plurality of zones, a first zone adjacent the central portion of said baffle, said first zone generally having a maximum number and size of circulation holes to generally form a maximum amount of open area for the flow of secondary therethrough, and a second zone disposed adjacent and generally encircling said first zone, said second zone having circulation holes arranged to form substantially less than the maximum amount of open area for the flow of secondary fluid through said second zone.
Claim 2
Dependent Claim
259 words
A vapor generator comprising a shell portion, a tube bundle having a plurality of tubes disposed within said shell portion, a wrapper disposed within said shell so as to generally enwrap said tube bundle, a tube sheet disposed on one end of the tube bundle a head portion cooperatively associated with said shell and tube sheet, a primary fluid inlet nozzle for supplying primary fluid to the inside of said tube, a secondary fluid inlet nozzle for supplying secondary fluid to the inside of said shell and the outside of said tubes, a baffle disposed parallel to said tube sheet and cooperatively associated with said wrapper so that at least a portion of the secondary fluid sweeps across said tube sheet and flows between an area between said baffle and said tube sheet, said baffle having a plurality of tube holes through which the tubes pass, said holes embracing said tubes and said baffle having a plurality of circulation holes through which at least a portion of the secondary fluid flows, said circulation holes being disposed in a plurality of zones, a first zone adjacent the central portion of said baffle, said first zone generally having a maximum number and size of circulation holes to generally form a maximum amount of open area for the flow of secondary therethrough, and a second zone disposed adjacent and generally encircling said first zone, said second zone having circulation holes arranged to form substantially less than the maximum amount of open area for the flow of secondary fluid through said second zone.
Claim 3
Dependent Claim
38 words
A steam generator as set forth in claim 1, and further comprising a third zone adjacent said second zone said third zone having flow holes arranged to form substantially less open area than formed in said second zone.
Claim 4
Dependent Claim
27 words
A steam generator as set forth in claim 2, wherein the second zone generally encircles the first zone and the third zone generally encircles the second zone.
Claim 5
Dependent Claim
50 words
A steam generator as set forth in claim 2 and further comprising a fourth zone generally forming a narrow band adjacent the perimeter of the baffle, said fourth zone having circulation holes generally arranged to provide the maximum amount of open area for the flow of the secondary fluid therethrough.
Claim 6
Dependent Claim
62 words
A steam generator as set forth in claim 1, wherein the tube bundles has U-shaped tubes forming a hotleg portion and a pre-heater is disposed over a portion of the cold leg portion of the tube bundles and the baffle is generally semi-circular and is disposed over the hot leg portion of the tube bundle and the first zone is generally semi-circular.
Claim 7
Dependent Claim
49 words
A steam generator as set forth in claim 5, and further comprising a third zone generally a narrow band adjaceNt the perimeter of the baffle, said third zone having circulation holes arranged to generally provide the maximum amount of open area for the flow of said secondary fluid therethrough.
References Cited (Backward Citations)
US3147743A
Cited
US3706301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |