US3610330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Linde GmbH
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Filing: 1968-11-04
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Granted: 1971-10-05
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Expires: 1988-11-04
Abstract
Abstract A heat exchanger, especially for the cooling of gases emerging at high temperature and low pressure from reactors and the like in which the tube bundle is formed by a stack of tube arrays, each of which is constituted by a pair of corrugated plates having their corrugations in mutually facing and registering relationship. The pair of plates are stacked together in a housing permitting flow of the coolant between the arrays perpendicular and/or parallel to the tubes while the compartments are sealed at the ends of the arrays at which the tubes terminate by outwardly flared edges of the plates, which are of quartercircular cross section and are welded together along seams parallel to the plane of the tubes of the respective array. The tube sheets normally required in tube-bundle heat exchangers are thus constituted by the plates which also form the tubes.
Inventors
- 👤 Gamal El Din Nasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D9/00; F28D9/0006; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0221; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/435
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
229 words
A heat exchanger, especially for heat exchange between a liquid coolant evaporating at high pressure and a hot gas at low pressure, said heat exchanger comprising a stack of arrays of mutually parallel transversely spaced coplanar tubes, each array being defined by the oppositely facing concavities of respective corrugations formed in a pair of juxtaposed plates of uniform cross-sectional thickness whereby the corrugations of each plate form respective tube halves, the edges of the plate pairs parallel to the longitudinal dimensions of the corrugations being welded together, said arrays of tubes collectively constituting a tube bundle open at the ends of said tubes, the plates of each of said arrays having outwardly flared smoothly curved edges welded to the corresponding edges of a plate of an adjacent array in a weld seam of substantially said thickness at least at one side of the tube bundle at which said tubes open, thereby forming seams closing respective compartments parallel to said arrays and between them, said compartments having uniform thickness smoothly curved walls at the sides of the tube bundle; first means for passing a first evaporating high-pressure heat exchange fluid through said compartments in a direction transverse to sad tubes; and second means for passing a low-pressure hot gas as the second heat exchange fluid through said tubes from one end of said tube bundle to the other end thereof.
Claim 2
Dependent Claim
229 words
A heat exchanger, especially for heat exchange between a liquid coolant evaporating at high pressure and a hot gas at low pressure, said heat exchanger comprising a stack of arrays of mutually parallel transversely spaced coplanar tubes, each array being defined by the oppositely facing concavities of respective corrugations formed in a pair of juxtaposed plates of uniform cross-sectional thickness whereby the corrugations of each plate form respective tube halves, the edges of the plate pairs parallel to the longitudinal dimensions of the corrugations being welded together, said arrays of tubes collectively constituting a tube bundle open at the ends of said tubes, the plates of each of said arrays having outwardly flared smoothly curved edges welded to the corresponding edges of a plate of an adjacent array in a weld seam of substantially said thickness at least at one side of the tube bundle at which said tubes open, thereby forming seams closing respective compartments parallel to said arrays and between them, said compartments having uniform thickness smoothly curved walls at the sides of the tube bundle; first means for passing a first evaporating high-pressure heat exchange fluid through said compartments in a direction transverse to sad tubes; and second means for passing a low-pressure hot gas as the second heat exchange fluid through said tubes from one end of said tube bundle to the other end thereof.
Claim 3
Dependent Claim
40 words
The heat exchanger defined in claim 3 wherein the juxtaposed plates of each of said pairs are substantially identical to the other plates of said respective pair but reversed by rotation through 180*in its plane about an axis transverse thereto.
Claim 4
Dependent Claim
42 words
The heat exchanger defined in claim 1 wherein said outwardly flared edges are of quarter-circular cross section and are butt welded whereby said respective compartments are closed by said seams and provided thereby with semicircular walls, said corrugations being of semicircular profile.
Claim 5
Dependent Claim
54 words
The heat exchanger defined in claim 3 wherein the juxtaposed plates of at least one of said pairs are formed by plate portions of a single elongated body folded at the end of the array opposite the respective said seam whereby the corrugations of the portions of said body open away from one another.
Claim 6
Dependent Claim
21 words
The heat exchanger defined in claim 4 wherein the tubes of the adjacent arrays are staggered transversely in the respective planes.
Claim 7
Dependent Claim
41 words
The heat exchanger defined in claim 5, further comprising a housing surrounding said tube bundle and formed with a pair of end flanges respectively carrying an inlet and an outlet duct constituting said second means, said ducts communicating with said tubes.
Claim 8
Dependent Claim
45 words
The heat exchanger defined in claim 6 wherein said plates have end edges welded to said flanges and graded toward the latter, said end edges sealing said compartments and being formed with pleats accommodating thermal stress at the junction of said plates with said flanges.
Claim 9
Dependent Claim
42 words
The heat exchanger defined in claim 6, further comprising reinforcing webs extending transversely to said plates and parallel to said tubes and welded between plates joined by a respective said seam to stiffen the respective wall of the compartment between the plates.
Claim 10
Dependent Claim
37 words
The heat exchanger defined in claim 6 wherein the cross section of said inlet duct corresponds substantially to the cross section of said tube bundle at said one side thereof but is spaced from said tube bundle.
Claim 11
Dependent Claim
33 words
The heat exchanger defined in claim 9 wherein each of said flanges defines an annular space with the respective duct, said heat exchanger further comprising a mass of thermal insulation filling said space.
Claim 12
Dependent Claim
63 words
The heat exchanger defined in claim 6 wherein said housing includes a shell and said first means includes at least one inlet communicating with said compartments and formed in the bottom of said shell and at least one outlet communicating with said compartment on the opposite side of said tube bundle from said inlet and formed In an upper portion of said shell.
Claim 13
Dependent Claim
55 words
The heat exchanger defined in claim 11 wherein said first fluid is a vaporizable liquid and said outlet is connected to a precipitator adapted to collect liquid from a vapor/liquid mixture emerging from said outlet, said precipitator being provided with conduit means connecting said precipitator with said inlet for returning coolant liquid to the latter.
Claim 14
Dependent Claim
16 words
The heat exchanger defined in claim 12 wherein said precipitator is a drum overlying said shell.
Claim 15
Dependent Claim
27 words
The heat exchanger defined in claim 3 wherein said second means is connected directly to the output of a gas reactor furnace for the formation of olefins.
Claim 16
Dependent Claim
43 words
The heat exchanger defined in claim 14 wherein said heat exchanger constitutes a precooler for the gases emerging from said furnace, further comprising a vertical cooler connected to said second means downstream of said tube bundle for further cooling of the reactor gases.
Claim 17
Dependent Claim
20 words
The heat exchanger defined in claim 3, further comprising means for selectively varying the flow cross section of said tubes.
Claim 18
Dependent Claim
43 words
The heat exchanger defined in claim 3 wherein one of the plates of each pair is cut away in a direction transverse to the respective corrugations and is welded to the other plate along a weld seam sealing said tubes from said compartments.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |