Patent US3913531A successfully refreshed from Google Patents.
US3913531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sediment blowdown arrangement for a shell and tube vapor generator
Assignee: Combustion Engineering Inc
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Filing: 1974-06-20
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Granted: 1975-10-21
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Expires: 1994-06-20
Abstract
Abstract Removal of sediment caused by the settling of suspended particulate material in the secondary liquid circulated through a vapor generator of the shell and tube type is effected by providing a baffle plate closely spaced from the tube sheet therein to define a plenum therebetween. One or more blowdown lines extend from the plenum and the baffle plate contains a plurality of drilled holes through which a limited portion of the secondary liquid passes at a high velocity conducting sediment with it to the blowdown plenum for removal through the blowdown lines.
Inventors
- 👤 Hollen Richard Frederick Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:16
CPC Classifications
F; F28; F28G; F28G9/00; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/025; F22B37/00; F22B37/02; F22B37/48; F22B37/483; F28D; F28D7/00; F28D7/06; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/402
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
185 words
In a shell and tube heat exchanger for the generation of vapor by the indirect transfer of heat from a heating fluid to a secondary liquid including a pressure shell having a transverse tube sheet defining a vapor generating region enclosing a bundle of heat exchange tubes emanating from said tube sheet, means for passing heating fluid through said tubes and means for circulating said secondary liquid through said vapor generating region exteriorly of said tubes, the improvement comprising means for the removal of sediment from said vapor generating region comprising: a. a baffle plate extending transversely of said shell in closely spaced, superposed, parallel relation to said tube sheet and defining therewith a blowdown plenum; b. means communicating with said blowdown plenum for fluid discharge therefrom; c. means forming through openings in said baffle plate for passing secondary liquid and entrained sediment from said vapor generating region to said blowdown plenum; and d. said blowdown plenum containing a plurality of upstanding plates extending transversely thereof to divide said plenuM into a plurality of independent sections, and means for passing fluid selectively from said sections.
Claim 2
Dependent Claim
185 words
In a shell and tube heat exchanger for the generation of vapor by the indirect transfer of heat from a heating fluid to a secondary liquid including a pressure shell having a transverse tube sheet defining a vapor generating region enclosing a bundle of heat exchange tubes emanating from said tube sheet, means for passing heating fluid through said tubes and means for circulating said secondary liquid through said vapor generating region exteriorly of said tubes, the improvement comprising means for the removal of sediment from said vapor generating region comprising: a. a baffle plate extending transversely of said shell in closely spaced, superposed, parallel relation to said tube sheet and defining therewith a blowdown plenum; b. means communicating with said blowdown plenum for fluid discharge therefrom; c. means forming through openings in said baffle plate for passing secondary liquid and entrained sediment from said vapor generating region to said blowdown plenum; and d. said blowdown plenum containing a plurality of upstanding plates extending transversely thereof to divide said plenuM into a plurality of independent sections, and means for passing fluid selectively from said sections.
Claim 3
Dependent Claim
46 words
The organization according to claim 1 in which said baffle plate contains a first set of through openings to accommodate passage of said tubes and a second set of through openings of smaller diameter than said first set for passage of fluid to said blowdown plenum.
Claim 4
Dependent Claim
49 words
The organization according to claim 1 in which said baffle plate contains a plurality of through openings to accommodate passage of said tubes, said openings being of greater diameter than the outside diameter of said tubes and defining clearance spaces for the passage of fluid to said blowdown plenum.
Claim 5
Dependent Claim
27 words
The organization according to claim 1 in which said upstanding plates are substantially radially extending through said plenum dividing the same into a plurality of independent sectors.
Claim 6
Dependent Claim
42 words
The organization according to claim 1 including header means surrounding said shell; blowdown lines communicating between each of said plenum sections and said header means; and valve means in said blowdown lines for passing fluid through selective ones of said blowdown lines.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |