Patent US4320795A successfully refreshed from Google Patents.
US4320795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for heat transfer with dilute phase fluidized bed
Assignee: Shell USA Inc
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Filing: 1977-03-14
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Granted: 1982-03-23
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Expires: 1997-03-14
Abstract
Abstract A process for the transfer of heat between solids is described in which a particulate solid is allowed to fall at a substantially uniform rate through a dilute phase fluidized bed of another particulate solid.
Inventors
- 👤 John E. Gwyn
- 👤 Scott C. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:02
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
Process for the transfer of heat between solid materials comprising, providing a relatively hot particulate heat carrier, countercurrently contacting a solid material subdivided to a particle size fluidizable in gas in the form of an upwardly moving dilute phase fluidized mass in gas in a vertically-oriented heat exchange zone with the relatively hot particulate heat carrier, the heat carrier being introduced in the upper portion of the heat exchange zone and having a particle size and density such that it falls through the dilute phase fluidized mass at a substantially uniform rate, and collects in the lower portion of the heat exchange zone as a relatively cool particulate heat carrier, the contacting producing a solid material at elevated temperature, removing the relatively cool heat carrier, and removing the solid material at elevated temperature from the upper portion of the heat exchange zone.
Claim 2
Dependent Claim
142 words
Process for the transfer of heat between solid materials comprising, providing a relatively hot particulate heat carrier, countercurrently contacting a solid material subdivided to a particle size fluidizable in gas in the form of an upwardly moving dilute phase fluidized mass in gas in a vertically-oriented heat exchange zone with the relatively hot particulate heat carrier, the heat carrier being introduced in the upper portion of the heat exchange zone and having a particle size and density such that it falls through the dilute phase fluidized mass at a substantially uniform rate, and collects in the lower portion of the heat exchange zone as a relatively cool particulate heat carrier, the contacting producing a solid material at elevated temperature, removing the relatively cool heat carrier, and removing the solid material at elevated temperature from the upper portion of the heat exchange zone.
Claim 3
Dependent Claim
146 words
Process for the transfer of heat between solid particles comprising, providing a relatively cool particulate heat carrier, countercurrently contacting a solid material having an elevated temperature and subdivided to a particle size fluidizable in gas in the form of a relatively hot upwardly moving dilute-phase fluidized mass in gas in a vertically-oriented heat exchange zone with the relatively cool particulate heat carrier, the heat carrier being introduced in the upper portion of the heat exchange zone and having a particle size and density such that it falls through the dilute phase fluidized mass at a substantially uniform rate, and collects in the lower portion of the heat exchange zone as a relatively warm particulate heat carrier, the contacting producing a relatively cool solid material, removing the relatively warm heat carrier, and removing the relatively cool solid material from the upper portion of the heat exchange zone.
Claim 4
Dependent Claim
146 words
Process for the transfer of heat between solid particles comprising, providing a relatively cool particulate heat carrier, countercurrently contacting a solid material having an elevated temperature and subdivided to a particle size fluidizable in gas in the form of a relatively hot upwardly moving dilute-phase fluidized mass in gas in a vertically-oriented heat exchange zone with the relatively cool particulate heat carrier, the heat carrier being introduced in the upper portion of the heat exchange zone and having a particle size and density such that it falls through the dilute phase fluidized mass at a substantially uniform rate, and collects in the lower portion of the heat exchange zone as a relatively warm particulate heat carrier, the contacting producing a relatively cool solid material, removing the relatively warm heat carrier, and removing the relatively cool solid material from the upper portion of the heat exchange zone.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the subdivided solid material is oil shale.
Claim 6
Dependent Claim
13 words
The method of claim 2 wherein the subdivided solid material is oil shale.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-22 | 1985-09-21 | 1986-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-22 | 1989-09-21 | 1990-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-22 | 1993-09-21 | 1994-03-23 | $7700.00 | Window Closed / Lapsed |