US3648380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed level control
Assignee: Alcoa Corp
•
Filing: 1970-05-28
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Granted: 1972-03-14
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Expires: 1990-05-28
Abstract
Abstract A method and structure for stabilizing the depth of material in a first, highly turbulent fluidized bed of solids by discharging the flow of material from the bed over a weir into a second, relatively calm fluidized bed of solids, the weir defining a boundary between the two beds. The level of the second bed is maintained at substantially the same height as the top of the weir, and an outlet opening is provided in the second bed for discharging the solids therefrom in a constant, consistent manner in comparison to that of the first, turbulent bed.
Inventors
- 👤 Rudolph L Guilloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:14
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1809; B01J2208/00; B01J2208/00008; B01J2208/00548; B01J2208/0061; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
The method of claim 1 including the additional step of discharging the solids from the second bed over a second weir and through a discharge opening.
Claim 2
Dependent Claim
83 words
Apparatus for stabilizing the depth of material in a highly turbulent fluidized bed of solids which solids are discharged from said bed by overflowing therefrom over a weir, the apparatus comprising a second fluidized bed of solids, said second bed being relatively calm in comparison to said first bed, and a structure associated with said second bed for maintaining the level thereof at substantially the same height as the top of said weir by controlling the rate of discharge from said second bed.
Claim 3
Dependent Claim
34 words
The apparatus of claim 3 in which the structure for maintaining the level of the second bed includes a second weir, the solids in the second bed being discharged therefrom over said second weir.
Claim 4
Dependent Claim
73 words
The apparatus of claim 3 in which the second fluidized bed comprises two elongated fluidizing bed structures disposed in end-to-end relationship with each other at the discharge end of the first fluidized bed, and an outlet opening in the second bed, and a second weir located at the juncture of said two fluidizing bed structures, said two fluidizing bed structures being effective to direct the material therein towards said second weir and opening.
Claim 5
Dependent Claim
40 words
The apparatus of claim 5 in which the second fluidized bed includes a gas permeable membrane, and the second weir comprises a pipe nipple disposed about the opening in the second bed and extends above the plane of said membrane.
Claim 6
Dependent Claim
39 words
The apparatus of claim 5, in which a splash plate is located between the first fluidized bed and the outlet opening in the second bed to prevent flow of fluidized material directly from the first bed into the opening.
Claim 7
Dependent Claim
40 words
The apparatus of claim 5 including a chamber structure having an upper wall portion located at the juncture of the two end-to-end beds, the outlet opening being provided in said wall portion and over the interior of said chamber structure.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |