US3595541A
Expired / Lapsed
US
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Method and apparatus for treating particulate solids in a fluidized bed
Assignee: ChampionX LLC
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Filing: 1969-05-20
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Granted: 1971-07-27
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Expires: 1989-05-20
Abstract
Abstract Method and apparatus for treating small size particulate solids in a fluidized bed, and the calcining of particulate magnesium carbonate and magnesium hydroxide, or a mixture thereof in a fluidized bed, wherein the apparatus may include an upstanding tubular member of substantially greater length than width defining a bed area or reaction vessel and means for heating the bed by driving heat through the walls of the tubular member, and including means coacting with the incoming fluidizing gas to enhance even fluidization.
Inventors
- 👤 Harold L Pabich
- 👤 Richard J Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:15
CPC Classifications
C; C04; C04B; C04B2/00; C04B2/10; C04B2/106; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
15 words
A fluidized bed as defined in claim 1, and a disengaging area above said tube.
Claim 2
Dependent Claim
26 words
A fluidized bed as defined in claim 1, wherein said heat transfer chamber includes an inlet and an outlet for passing the high temperature fluid therethrough.
Claim 3
Dependent Claim
32 words
A fluidized bed as defined in claim 3, wherein said inlet is located at the lower end of said chamber and said outlet is located at the upper end of said chamber.
Claim 4
Dependent Claim
16 words
A fluidized bed as defined in claim 1, wherein said high-temperature fluid is about 1,500* F.
Claim 5
Dependent Claim
16 words
A fluidized bed as defined in claim 1, wherein said fluidizing gas is about 300* F.
Claim 6
Dependent Claim
21 words
A fluidized bed as defined in claim 1, wherein the length of said tube is about 10 times the diameter thereof.
Claim 7
Dependent Claim
141 words
A fluidized bed calciner for calcining solids such as magnesium carbonate and magnesium hydroxide or a mixture thereof comprising, an elongated tube of cylindrical cross section having a length substantially greater than the diameter and defining a bed area for receiving solids to be calcined, heat and a fluidizing gas, a gas distribution plate at the lower end of the tube for supporting a bed of solids, gas inlet holes in said plate, means for withdrawing calcined material from said tube including a valve associated with said distribution plate, means for supplying a fluidizing gas to said bed through said distributor plate holes, means defining a heat transfer chamber around said tube, and means introducing into said chamber high-temperature fluid for effecting heating of said bed to such a temperature to raise the solids temperature above the threshold energy temperature level.
Claim 8
Dependent Claim
30 words
A fluidized bed as defined in claim 8, wherein said valve includes an opening in said plate defining a valve seat and a valve closure member coacting with said seat.
Claim 9
Dependent Claim
20 words
A fluidized bed as defined in claim 9, whereiN said valve is centrally positioned relative said tube and distribution plate.
Claim 10
Dependent Claim
57 words
A fluidized bed as defined in claim 10, wherein said closure member includes a lower closure portion coacting with said seat and an upper conically shaped fluidizing gas velocity control portion for causing the gas velocity to be greatest at the distribution plate and gradually decreasing as it moves upwardly into the tube to enhance even fluidization.
Claim 11
Dependent Claim
126 words
A fluidized bed calciner comprising an elongated upstanding tube having a length substantially greater than its cross-sectional dimension and defining a bed area therein, a perforated distributor plate at the lower end of the tube for supporting a bed of fluidized material in the bed area and for distributing a fluidizing gas upwardly through the bed, means supplying low-velocity fluidizing gas to said distributor plate, discharge means associated with the lower end of the tube for withdrawing calcined material from the bed, including a valve centrally of said distributor plate, and means for supplying sufficient heat through the walls of the tube to said bed area to cause heat transfer to said bed and establish a threshold energy temperature level of said material sufficient for calcination.
Claim 12
Dependent Claim
68 words
A fluidized bed calciner as defined by claim 12, wherein said valve includes an opening in said plate defining a valve seat, and a movable closure member above said plate having a valve portion coacting with said valve seat to selectively open and close same and a fluidizing gas velocity control portion above said plate for causing a higher gas velocity adjacent the plate thereby enhancing even fluidization.
Claim 13
Dependent Claim
17 words
A fluidized bed calciner as defined by claim 12, and means for pulsating said fluidized gas supply.
Claim 14
Independent Claim
94 words
The method of treating granular solids of small particle size comprising the steps of, introducing the solids to be treated into an elongated upstanding tubular receptacle, injecting a low-velocity fluidizing gas into the lower end of said receptacle to pass upwardly through the solids and produce a fluidized bed in said receptacle, driving high temperature heat through the sidewalls of the receptacle uniformly along the entire area of the bed to produce a substantially constant temperature through said bed both horizontally and vertically and effect treatment of the solids, and pulsing the fluidizing gas.
Claim 15
Dependent Claim
21 words
The method as defined in claim 15, wherein the solids comprise magnesium carbonate and the treatment consists of calcining the carbonate.
Claim 16
Dependent Claim
21 words
The method as defined in claim 15, wherein the solids comprise magnesium hydroxide and the treatment consists of calcining the hydroxide.
Claim 17
Dependent Claim
132 words
A fluidized bed calciner comprising an elongated upstanding tube having a length substantially greater than its cross-sectional dimension and defining a bed are therein, a perforated distributor plate at the lower end of the tube for supporting a bed of fluidized material in the bed area and for distributing a fluidizing gas upwardly through the bed, means supplying low-velocity fluidizing gas to said distributor plate, discharge means associated with the lower end of the tube for withdrawing calcined material from the bed, means for supplying sufficient heat through the walls of the tube to said bed area to cause heat transfer to said bed and establish a threshold energy temperature level of said material sufficient for calcination, and mechanical means in saId tube for agitating the material in the bed during calcination.
Claim 18
Dependent Claim
27 words
The method as defined in claim 15, wherein the solids comprise a mixture of magnesium carbonate and magnesium hydroxide and the treatment consists of calcining the mixture.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |