US3556207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainable shield for heat exchangers
Assignee: Babcock and Wilcox Co
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Filing: 1968-11-13
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Granted: 1971-01-19
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Expires: 1988-11-13
Abstract
Abstract A drainable shield for protecting the metal casing of a hopper from the quenching effect of condensate formed at each cold end section of a heat exchanger use in conjunction with a steamgenerating unit. The drainable shield forms a water-shielding cover over the hopper casing and collects the condensate for discharge through the hopper drain. Flue gases are allowed to flow above as well as below the shield thereby insuring that all of the hopper casing will be maintained at substantially the same operating temperature.
Inventors
- 👤 Edward J Piaskowski
- 👤 Edward W Kreider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:46
CPC Classifications
F; F23; F23L; F23L15/00; F23L15/04; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10S; Y10S165/00; Y10S165/921
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
An air heater having heat exchange means defining a separate first and second passageway, means for passing relatively low temperature air to be heated through the first passageway, means for passing a heating gas through the second passageway, a hopper located beneath the heat exchange means and in fluid flow communication with the second passageway, said hopper having at least one opening for drainage therethrough, the second passageway of said heat exchange means including a cold end section located adjacent the inlet to the first passageway, the improvement comprising an impervious shield interposed between the cold end section and a portion of the hopper in condensation receiving relationship with said cold end section, said shield including a cover member open on all sides to compensate for the expansion and contraction of said cover independent of the hopper, and draining means arranged for removing condensate from the shield substantially out of reentraining contact with the heating gas passing through the hopper and including structure for draining said condensate through the opening in the hopper floor.
Claim 2
Dependent Claim
174 words
An air heater having heat exchange means defining a separate first and second passageway, means for passing relatively low temperature air to be heated through the first passageway, means for passing a heating gas through the second passageway, a hopper located beneath the heat exchange means and in fluid flow communication with the second passageway, said hopper having at least one opening for drainage therethrough, the second passageway of said heat exchange means including a cold end section located adjacent the inlet to the first passageway, the improvement comprising an impervious shield interposed between the cold end section and a portion of the hopper in condensation receiving relationship with said cold end section, said shield including a cover member open on all sides to compensate for the expansion and contraction of said cover independent of the hopper, and draining means arranged for removing condensate from the shield substantially out of reentraining contact with the heating gas passing through the hopper and including structure for draining said condensate through the opening in the hopper floor.
Claim 3
Dependent Claim
41 words
A heat exchanger according to claim 1 wherein the cover member is spaced above the hopper floor for parallel flow of heating gases of substantially equal temperature above as well as below said cover and thereafter through the heat exchange means.
Claim 4
Dependent Claim
27 words
A heat exchanger according to claim 1 wherein the cover member includes a plurality of flanged plates alternately arranged to allow flanges of adjoining plates to overlap.
Claim 5
Dependent Claim
51 words
A heat exchanger according to claim 1 wherein said impervious shield includes deflector plates spaced between the cover and the cold end section to shield the lateRal openings between the cover and the side and rear walls of the hopper, said deflector plates being attached to the sides of the hopper.
Claim 6
Dependent Claim
33 words
A heat exchanger according to claim 1 wherein the floor of the hopper converges downwardly toward the drain opening and the impervious shield extends in a direction substantially parallel to said hopper floor.
Claim 7
Dependent Claim
32 words
A heat exchanger according to claim 1 wherein the cover edge facing upstream gas flowwise is provided with a trough, and at least one drainpipe connecting said trough with the drain opening.
Claim 8
Dependent Claim
24 words
A heat exchanger according to claim 1 wherein said drain opening connects to a collecting box to receive the discharge end of the drainpipe.
Claim 9
Dependent Claim
20 words
A heat exchanger according to claim 1 wherein the cover member is supported from the shielded portion of said hopper.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |