Patent US4027729A successfully refreshed from Google Patents.
US4027729A
Expired / Lapsed
US
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Device for chill-drying a gas
Assignee: Individual
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Filing: 1974-07-15
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Granted: 1977-06-07
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Expires: 1994-07-15
Abstract
Abstract A device for chill-drying a gas comprising a gas/gas heat-exchanger and a gas/cooling medium heat-exchanger located within a pressure vessel such that the heat-exchangers define channels between themselves and the walls of the vessel, which channels connect a gas outlet at the bottom of the gas/gas heat-exchanger with a gas inlet at the top of the gas/cooling medium heat-exchanger. The pressure vessel is cylindrical and the gas/gas heat-exchanger has a curved surface lying against the inner surface of the pressure vessel, and a planar surface abutting against the gas/cooling medium heat exchanger which has a rectangular cross-section and its corners remote from the gas/gas heat exchanger abutting against the walls of the pressure vessel. A filter is positioned beneath the gas/cooling medium and pre-filters are located in the said channels, the arrangement being such that the gas to be treated flows through the gas/gas heat-exchanger via a plurality of tubes, through the channels, through the gas/cooling medium heat-exchanger, through the filter, and finally back through the gas/gas heat-exchanger via the interstices between the said tubes.
Inventors
- 👤 Peter Bruhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:20
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
277 words
A device for chill-drying a gas comprising a pressure vessel having an inner surface, a first gas/gas heat exchanger, located in said pressure vessel and having vertically extending tubes parallel with each other and with the axis of said pressure vessel, said tubes defining first and second independent generally vertical fluid paths each having upper and lower ends and in heat-exchanging relationship, a gas outlet at said lower end of said first path and a gas inlet at said lower end of said second path, a second gas/cooling medium heat-exchanger located in said pressure vessel and extending vertically alongside said first heat-exchanger and having two independent fluid paths in heat-exchanging relationship, each of said fluid paths of said second heat-exchanger being generally vertical and having upper and lower ends, a gas inlet at said upper end and a gas outlet at said lower end of one of said fluid paths of said second heat-exchanger, and channels defined between said first and second heat-exchangers and said inner surface of said pressure vessel for connecting said gas outlet of said first heat-exchanger with the said gas inlet of said second heat-exchanger, and means for connecting said gas outlet of said second heat-exchanger with said gas inlet of said first heat-exchanger whereby in use of the device the gas to be treated flows through said first path of said first heat-exchanger, through said channels, through one of said paths of said second heat-exchanger and finally through said second fluid path of said first heat-exchanger so that the first and second heat-exchangers are contained in said common pressure vessel which serves the function of two individual pressure vessels and connecting tubes.
Claim 2
Independent Claim
277 words
A device for chill-drying a gas comprising a pressure vessel having an inner surface, a first gas/gas heat exchanger, located in said pressure vessel and having vertically extending tubes parallel with each other and with the axis of said pressure vessel, said tubes defining first and second independent generally vertical fluid paths each having upper and lower ends and in heat-exchanging relationship, a gas outlet at said lower end of said first path and a gas inlet at said lower end of said second path, a second gas/cooling medium heat-exchanger located in said pressure vessel and extending vertically alongside said first heat-exchanger and having two independent fluid paths in heat-exchanging relationship, each of said fluid paths of said second heat-exchanger being generally vertical and having upper and lower ends, a gas inlet at said upper end and a gas outlet at said lower end of one of said fluid paths of said second heat-exchanger, and channels defined between said first and second heat-exchangers and said inner surface of said pressure vessel for connecting said gas outlet of said first heat-exchanger with the said gas inlet of said second heat-exchanger, and means for connecting said gas outlet of said second heat-exchanger with said gas inlet of said first heat-exchanger whereby in use of the device the gas to be treated flows through said first path of said first heat-exchanger, through said channels, through one of said paths of said second heat-exchanger and finally through said second fluid path of said first heat-exchanger so that the first and second heat-exchangers are contained in said common pressure vessel which serves the function of two individual pressure vessels and connecting tubes.
Claim 3
Dependent Claim
133 words
A device as claimed in claim 1, wherein said pressure vessel is cylindrical, said first heat-exchanger has a cross-section the shape of a segment of a circle with a radius of curvature the same as that of said inner surface of said pressure vessel, said first heat-exchanger having a curved surface lying against said inner surface of said pressure vessel and a planar surface, said second heat-exchanger is rectangular in cross-section with surfaces defining pairs of opposed long and short sides and corners between adjacent ones of said long and short sides, the surface of said second heat-exchanger defining one said long side abuts against said planar surface of said first heat-exchanger, and said corners of said second heat-exchanger opposite said one long side abut against said inner surface of said pressure vessel.
Claim 4
Dependent Claim
113 words
A device as claimed in claim 2, wherein said first and second heat-exchangers have respective upper and lower ends, said upper end of said second heat-exchanger is located above said upper end of said first heat-exchanger, said second heat-exchanger is shorter than said first heat-exchanger, a filter is located in said pressure vessel beneath said second heat exchanger, the said one fluid path of said second heat-exchanger having a gas outlet at said lower end of said second heat-exchanger, and said other fluid path of said first heat-exchanger having an inlet at said lower end of said first heat-exchanger, whereby gas flows from said second heat-exchanger through said filter to said first heat-exchanger.
Claim 5
Dependent Claim
28 words
A device as claimed in claim 1, wherein said channels have respective upper and lower ends, and filters are located within the channels at their said lower ends.
Claim 6
Dependent Claim
32 words
A device as claimed in claim 1, wherein said pressure vessel has an opening for access to the interior of said vessel, and a lid is provided for normally closing said opening.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |