US3749160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube bank heat exchanger and unit of such heat exchangers
Assignee: Norsk Hydro ASA
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Filing: 1970-07-01
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Granted: 1973-07-31
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Expires: 1990-07-01
Abstract
Abstract An improved elongated tube bank heat exchanger and a unit of such heat exchangers coupled in series for heat treatment of gas. The tube bank in the heat exchanger mantle is encompassed by a jacket extending coaxially through the mantle spaced from the inside of the mantle. The heat exchanger mantle is provided with two gas access openings positioned at the same cross-sectional plane on the mantle and substantially at the mid-point thereof. One of the accesses communicates directly with the inside of the jacket, the other access opening communicates with the spacing between the inside of the mantle and the outside of the jacket. The jacket is open at both ends, whereby the gas stream when introduced into one of the access openings is divided into two gas streams each of which flows in opposite directions through the heat exchanger, the streams turning at each respective end of the heat exchanger and being unified anew before leaving the heat exchanger.
Inventors
- 👤 R Vestre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:04
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1838; F28; F28D; F28D7/00; F28D7/06; F28F; F28F9/00; F28F9/005; F28F9/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
A tube bank heat exchanger for the heat treatment of gas, said exchanger comprising: a heat exchanger mantle having first and second access openings therein, both of said access openings opening into said mantle at the same cross-sectional plane at the midpoint of said mantle; a tube bank positioned within said mantle and extending from one end to the other thereof; means positioned coaxially within said mantle for providing two separate, divided unobstructed gas flow streams through said mantle, of said gas being treated; said means for providing comprising a single internally open jacket positioned coaxially within said matle, said jacket surrounding said tube bank substantially from one end thereof to the other, the outer surface of said jacekt being spaced from the inner surface of said mantle, thus forming a chamber therebetween, the opposite ends of said jacket being completely open, the inner surface of said jacket being continuous and unobstructed from one of said opposite open ends thereof to the other; and means to communicate one of said access openings directly to the interior of said jacket at substantially the longitudinal midpoint thereof; the other of said access openings communicating with said chamber at substantially the longitudingal midpoint thereof; said jacket being operative to divide gas from one of said access openings into two equal gas streams which flow unobstructedly in opposite directions and which at said opposite open ends of said jacket are turned around to flow unobstructedly and unite at the other of said access openings.
Claim 2
Dependent Claim
250 words
A tube bank heat exchanger for the heat treatment of gas, said exchanger comprising: a heat exchanger mantle having first and second access openings therein, both of said access openings opening into said mantle at the same cross-sectional plane at the midpoint of said mantle; a tube bank positioned within said mantle and extending from one end to the other thereof; means positioned coaxially within said mantle for providing two separate, divided unobstructed gas flow streams through said mantle, of said gas being treated; said means for providing comprising a single internally open jacket positioned coaxially within said matle, said jacket surrounding said tube bank substantially from one end thereof to the other, the outer surface of said jacekt being spaced from the inner surface of said mantle, thus forming a chamber therebetween, the opposite ends of said jacket being completely open, the inner surface of said jacket being continuous and unobstructed from one of said opposite open ends thereof to the other; and means to communicate one of said access openings directly to the interior of said jacket at substantially the longitudinal midpoint thereof; the other of said access openings communicating with said chamber at substantially the longitudingal midpoint thereof; said jacket being operative to divide gas from one of said access openings into two equal gas streams which flow unobstructedly in opposite directions and which at said opposite open ends of said jacket are turned around to flow unobstructedly and unite at the other of said access openings.
Claim 3
Dependent Claim
82 words
A heat exchanger unit comprising a plurality of heat exchangers as recited in claim 1, wherein said plurality of heat exchangers are coupled in series, the communication between said plurality of heat exchangers taking place via the access opening thereof which communicate with said chambers between said jackets and mantles thereof, such that the gas flows into a first heat exchanger and out of a second heat exchanger via said access openings thereof which communicate directly with the interiors of said jackets.
Claim 4
Dependent Claim
162 words
A heat exchanger unit as recited in claim 2, wherein said heat exchangers are coupled together in opposite directions with respect to the flow of gas therethrough, such that the gas in a first heat exchanger first flows through the interior of the jacket thereof and thereafter leaves said jacket at both ends of the mantle and flows back through the chamber between said jacket and the inside of said mantle in a two-way, oppositely directed flow to be unified at the access opening serving as an outlet, said outlet being coupled to a first access opening on the following heat exchanger, said first access opening on said following heat exchanger leading into the chamber between the jacket and the mantle thereof, whereby the gas first will flow through said chamber and then return to the midpoint of said following heat exchanger and leave said following heat exchanger via the access opening thereof communicating directly with the interior of said jacekt thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |