Patent US4421162A successfully refreshed from Google Patents.
US4421162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat plate heat exchange apparatus
Assignee: Dow Chemical Co
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Filing: 1982-06-25
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Granted: 1983-12-20
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Expires: 2002-06-25
Abstract
Abstract A heat exchange assembly is provided which employs concentric flat plate heaters. The heat exchanger is useful as a reactor particularly where the temperature profile of the material flowing therethrough is controlled or varied.
Inventors
- 👤 James E. Tollar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:01
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0012; F28D9/0018
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
226 words
A heat exchange vessel, the vessel having an axis extending from a first end to a second end, a foraminous feed tube disposed generally coaxially with the axis of the vessel at least adjacent the first end, a first annular flat plate heat exchanger disposed coaxially about the foraminous tube; at least a second flat plate heat exchanger disposed externally to the first flat plate heat exchanger and generally coaxial therewith; means to supply a first heat exchange fluid to the first flat plate heat exchanger; means to supply a second heat exchange fluid to the second flat plate heat exchanger, the first and second flat plate heat exchangers being disposed within the vessel, the vessel having a product discharge port at the second end of the vessel with the further limitation that each of the flat plate heat exchangers comprise a plurality of generally annular flat plates, each having a centrally disposed aperture, the plate like members assembled perpendicularly to the axis of the vessel with a space between each of the individual plate members; the plate members being positioned in close proximity to one another to provide a flow pattern between adjacent members, the plate members being in spaced apart relationship; a plurality of heat exchange conduits passing through said plate like members to thereby permit circulation of heat exchange fluid through said conduits.
Claim 2
Dependent Claim
226 words
A heat exchange vessel, the vessel having an axis extending from a first end to a second end, a foraminous feed tube disposed generally coaxially with the axis of the vessel at least adjacent the first end, a first annular flat plate heat exchanger disposed coaxially about the foraminous tube; at least a second flat plate heat exchanger disposed externally to the first flat plate heat exchanger and generally coaxial therewith; means to supply a first heat exchange fluid to the first flat plate heat exchanger; means to supply a second heat exchange fluid to the second flat plate heat exchanger, the first and second flat plate heat exchangers being disposed within the vessel, the vessel having a product discharge port at the second end of the vessel with the further limitation that each of the flat plate heat exchangers comprise a plurality of generally annular flat plates, each having a centrally disposed aperture, the plate like members assembled perpendicularly to the axis of the vessel with a space between each of the individual plate members; the plate members being positioned in close proximity to one another to provide a flow pattern between adjacent members, the plate members being in spaced apart relationship; a plurality of heat exchange conduits passing through said plate like members to thereby permit circulation of heat exchange fluid through said conduits.
Claim 3
Dependent Claim
15 words
The heat exchange vessel of claim 1 having more than two flat plate heat exchangers.
Claim 4
Dependent Claim
28 words
The vessel of claim 2 wherein the heat exchange conduits of the first and second flat plate heat exchangers terminate in annular plenums adjacent the second tube sheet.
Claim 5
Dependent Claim
25 words
The heat exchange vessel of claim 1 having at least 1 tube sheet, said tube sheet having a plurality of generally arcuate slits formed therein.
Claim 6
Dependent Claim
43 words
The heat exchanger of claim 1 wherein the flat plates are formed from a plurality of block-like elements with ends of adjacent blocks overlapping and adjacent spaced apart blocks which are coplanar in combination with a second plurality of blocks which are coplanar.
Claim 7
Dependent Claim
20 words
The vessel of claim 1 wherein the vessel is jacketed and the jacketed vessel has heat exchange inlets and outlets.
Claim 8
Dependent Claim
50 words
The heat exchanger of claim 1 wherein in each flat plate heat exchanger, the tubes are arranged in pairs and one member of each pair communicates with a generally annular input plenum and one member of each pair communicates with an output plenum adjacent the first end of the vessel.
Claim 9
Dependent Claim
11 words
The vessel of claim 1 wherein the flat plates are planar.
Claim 10
Dependent Claim
30 words
The vessel of claim 1 wherein adjacent plates are separated by a plurality of spacer elements disposed therebetween and having at least a pair of heat exchange conduits passing therethrough.
Claim 11
Dependent Claim
61 words
The vessel of claim 1 wherein the second tube sheet in a region betweeen the flat plate heat exchangers defines a plurality of slots, the slots being in a generally spiral pattern, said second tube sheet having disposed thereon a liquid impermeable sheet of lesser thickness, the second tube sheet, the impermeable sheet, being disposed generally adjacent the first tube sheet.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |