US3578798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclonic fluid bed reactor
Assignee: Babcock and Wilcox Co
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Filing: 1969-05-08
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Granted: 1971-05-18
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Expires: 1989-05-08
Abstract
Abstract A high capacity fluidized bed unit is formed of single or multiple stages where reaction products may be maintained out of contact with gaseous products of combustion used to provide heat for the reaction.
Inventors
- 👤 Walter C Lapple
- 👤 Edward M Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/36; B01J8/1836; B01J8/26; B01J8/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
In fluidized bed apparatus, the combination comprising: A. Walls forming an upright vessel having an upper outlet; B. a substantially unobstructed upright tube within said vessel and having its upper end opening into the upper portion of said vessel; C. means for introducing combustion constitutes into the lower end portion of said tube to effect combustion within said tube with the products of combustion spiraling upwardly through said tube; D. means forming an annular fluidized bed of particle-form material intermediate the height of said tube between said tube and the wall of said vessel; E. means including tangentially arranged openings in the tube wall interconnecting said fluidized bed and the interior of said tube for movement of particle-form material from said fluidized bed into the products of combustion spiraling upwardly through said tube; and F. means for separating the particle-form material from the gaseous products of combustion in the upper portion of said vessel with the gases passing through said upper outlet and said particle-form material deposited into said fluidized bed.
Claim 2
Dependent Claim
171 words
In fluidized bed apparatus, the combination comprising: A. Walls forming an upright vessel having an upper outlet; B. a substantially unobstructed upright tube within said vessel and having its upper end opening into the upper portion of said vessel; C. means for introducing combustion constitutes into the lower end portion of said tube to effect combustion within said tube with the products of combustion spiraling upwardly through said tube; D. means forming an annular fluidized bed of particle-form material intermediate the height of said tube between said tube and the wall of said vessel; E. means including tangentially arranged openings in the tube wall interconnecting said fluidized bed and the interior of said tube for movement of particle-form material from said fluidized bed into the products of combustion spiraling upwardly through said tube; and F. means for separating the particle-form material from the gaseous products of combustion in the upper portion of said vessel with the gases passing through said upper outlet and said particle-form material deposited into said fluidized bed.
Claim 3
Dependent Claim
28 words
The combination of claim 1 wherein said tube is of circular cross section and positioned with its longitudinal axis coinciding with the upright axis of said upright vessel.
Claim 4
Dependent Claim
60 words
The combination of claim 2 wherein a plurality of annular fluidized beds are vertically spaced within said vessels in surrounding relation to said tube, a lower of said fluidized beds is interconnected with said tube, and an upwardly adjacent bed is connected with a lower adjacent bed by an upright gravity flow tube for movement of particle-form material downwardly therethrough.
Claim 5
Dependent Claim
32 words
The combination of claim 3 wherein direct means provide flow of the gaseous product of thermal reaction in said lowermost fluidized bed through said bed for fluidization of the particle-form material therein.
Claim 6
Dependent Claim
42 words
The combination of claim 4 wherein annular collar means are spaced from and encircle the means interconnecting a lower fluidized bed with said tube, and means provide a selective flow of inert gas into the space between said collar and said tube.
Claim 7
Dependent Claim
20 words
The combination according to claim 1 wherein means are provided for controlled delivery of reactant material into said fluidized bed.
Claim 8
Dependent Claim
15 words
The combination according to claim 1 wherein said particle-form material includes an inert granular solid.
Claim 9
Dependent Claim
19 words
The combination according to claim 6 wherein means provides for the controlled withdrawal of particle-form solids from said vessel.
Claim 10
Dependent Claim
21 words
The combination according to claim 1 wherein said annular fluidized bed is sized for preferred retention time of particle-form materials therein.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |