US4279207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid bed combustion
Assignee: Wormser Engineering Inc
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Filing: 1979-04-20
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Granted: 1981-07-21
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Expires: 1999-04-20
Abstract
Abstract A fluid bed reactor in which a gas is reacted with small particles of solid, rubbed off in the fluid bed from larger particles of solid.
Inventors
- 👤 Alex F. Wormser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; F; F22; F22B; F22B31/00; F22B31/0007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
247 words
The method of combustion which comprises providing a layer of a first particulate material supported on a first distributor plate, said first particulate material being incombustible, fluidizing said first particulate material with a stream of air to provide a first fluidized bed, said first fluidized bed being contained in a first zone of height proper to prevent loss of said first particulate material, introducing into said first fluidized bed a minor proportion of a flowable combustible fuel, burning said flowable combustible fuel in said air to form combustion gas, providing downstream of said first fluidized bed a second layer of a second particulate material supported on a second distributor plate, said second particulate material containing a sorbent for a component of said combustion gas, fluidizing said second particulate material by passing said combustion gas through said second distributor plate to provide a second fluidized bed, said second fluidized bed being contained in a second zone of height proper to prevent loss of said second particulate material, transporting said combustion gas against discrete objects too heavy to be moved by said combustion gas flow to slow velocity into said second fluidized bed, providing a quantity of microchips by interparticle collision in said second fluidized bed at a rate to provide new reactive surface area as fast as reaction depletes formerly reactive surface area, introducing into said second fluidized bed a nonsorbent ballast, and controlling the depth of said second fluidized bed in order to control fluidization and elutriation.
Claim 2
Independent Claim
247 words
The method of combustion which comprises providing a layer of a first particulate material supported on a first distributor plate, said first particulate material being incombustible, fluidizing said first particulate material with a stream of air to provide a first fluidized bed, said first fluidized bed being contained in a first zone of height proper to prevent loss of said first particulate material, introducing into said first fluidized bed a minor proportion of a flowable combustible fuel, burning said flowable combustible fuel in said air to form combustion gas, providing downstream of said first fluidized bed a second layer of a second particulate material supported on a second distributor plate, said second particulate material containing a sorbent for a component of said combustion gas, fluidizing said second particulate material by passing said combustion gas through said second distributor plate to provide a second fluidized bed, said second fluidized bed being contained in a second zone of height proper to prevent loss of said second particulate material, transporting said combustion gas against discrete objects too heavy to be moved by said combustion gas flow to slow velocity into said second fluidized bed, providing a quantity of microchips by interparticle collision in said second fluidized bed at a rate to provide new reactive surface area as fast as reaction depletes formerly reactive surface area, introducing into said second fluidized bed a nonsorbent ballast, and controlling the depth of said second fluidized bed in order to control fluidization and elutriation.
Claim 3
Dependent Claim
14 words
The process of claim 1 in which said flowable combustible fuel is crushed coal.
Claim 4
Dependent Claim
12 words
The process of claim 1 in which said sorbent is a desulfurizer.
Claim 5
Dependent Claim
11 words
The process of claim 3 in which said objects are rocks.
Claim 6
Dependent Claim
19 words
The process of claim 3 in which the active desulfurizing ingredient in said sorbent feed material is calcium carbonate.
Claim 7
Dependent Claim
24 words
The process of claim 5 in which said second fluidized bed is at a temperature in the range of 1450° F. to 1600° F.
Claim 8
Dependent Claim
22 words
The process of claim 5 in which said second particulate material is of size in the range of plus 1/4" minus 1".
Claim 9
Dependent Claim
24 words
The process of claim 1 in which said objects cover bubble caps in said second distributor plate and through which said combustion gas moves.
Claim 10
Dependent Claim
23 words
The process of claim 1 in which fluidizing velocity in said second fluidized bed is from 2 to 4 times minimum fluidizing velocity.
Claim 11
Dependent Claim
21 words
The process of claim 1 in which the depth of said second fluidized bed is in the range 4" to 9".
Claim 12
Dependent Claim
24 words
The process of claim 1 in which a relatively finer, more easily fluidizable second particulate material is used at startup than during steady-state operation.
Claim 13
Dependent Claim
19 words
The process of claim 11 in which no nonsorbent particulate is introduced into said second fluidizing zone during startup.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |