US4296612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze exchanger with removable tube liner
Assignee: Chicago Bridge and Iron Co
•
Filing: 1980-06-18
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Granted: 1981-10-27
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Expires: 2000-06-18
Abstract
Abstract A freeze exchanger comprising at least one freeze tube secured in, and penetrating, first and second spaced-apart tube sheets; a cover beyond the first tube sheet; a shell around the tube sheets and connected thereto, with said cover supported by the shell; a removable tubular liner, in the freeze tube, of smaller outside diameter than the inside diameter of the freeze tube thereby defining an annulus between the two tubes; a conduit to deliver a liquid feed stream into a feed box space between the first tube sheet and the cover; and a conduit to deliver a cooling fluid around the freeze tube inside of the shell between the first and second tube sheets and a conduit to remove cooling fluid therefrom.
Inventors
- 👤 Vincent F. Allo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:50
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A freeze exchanger comprising: at least one freeze tube secured in, and penetrating, first and second spaced-apart tube sheets; a cover beyond the first tube sheet; a shell around the tube sheets and connected thereto, with said cover supported by the shell; a removable tubular liner, in the freeze tube, of smaller outside diameter than the inside diameter of the freeze tube thereby defining an annulus between the two tubes; means to deliver a liquid feed stream into a feed box space between the first tube sheet and the cover; and means to deliver a cooling fluid around the freeze tube inside of the shell between the first and second tube sheets and means to remove cooling fluid therefrom.
Claim 2
Dependent Claim
119 words
A freeze exchanger comprising: at least one freeze tube secured in, and penetrating, first and second spaced-apart tube sheets; a cover beyond the first tube sheet; a shell around the tube sheets and connected thereto, with said cover supported by the shell; a removable tubular liner, in the freeze tube, of smaller outside diameter than the inside diameter of the freeze tube thereby defining an annulus between the two tubes; means to deliver a liquid feed stream into a feed box space between the first tube sheet and the cover; and means to deliver a cooling fluid around the freeze tube inside of the shell between the first and second tube sheets and means to remove cooling fluid therefrom.
Claim 3
Dependent Claim
16 words
A freeze exchanger according to claim 1 including spacers centering the liner in the freeze tube.
Claim 4
Dependent Claim
19 words
A freeze exchanger according to claim 1 including sealing means to seal the annulus near the second tube sheet.
Claim 5
Dependent Claim
24 words
A freeze exchanger according to claim 1 in which the liner is longer than the freeze tube and extends beyond the first tube sheet.
Claim 6
Dependent Claim
27 words
A freeze exchanger according to claim 1 in which the liner end near the second tube sheet is open to the environment outside of the freeze exchanger.
Claim 7
Dependent Claim
20 words
A freeze exchanger according to claim 1 in which the liner is metal and it has a polished internal surface.
Claim 8
Dependent Claim
16 words
A freeze exchanger according to claim 1 in which the liner comprises a solid polymeric material.
Claim 9
Dependent Claim
20 words
A freeze exchanger according to claim 1 in which the liner is metal coated inside with a solid polymeric material.
References Cited (Backward Citations)
US2718279A
Cited
US3603103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |