Patent US4227488A successfully refreshed from Google Patents.
US4227488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed unit including a cooling device for bed material
Assignee: Foster Wheeler Energy Corp
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Filing: 1978-10-03
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Granted: 1980-10-14
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Expires: 1998-10-03
Abstract
Abstract A fluidized bed combustion or gasification unit in which a grate is disposed in a housing to divide the housing into an upper chamber and a lower chamber. A bed of particulate material including burning fuel is supported by the grate and extends in the upper chamber. The lower chamber has an inlet for receiving pressurized air for passing through the lower chamber, the grate, and the bed of particulate material to fluidize the particulate material. A cooling device is provided for receiving the particulate material from the bed and cooling same prior to the material being discharged to external equipment.
Inventors
- 👤 Robert D. Stewart
- 👤 Robert L. Gamble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:32
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/003; B01J8/18; B01J8/1836; F; F22; F22B; F22B31/00; F22B31/0007; F22B31/0015; F22B31/0023; F22B31/0084; F23; F23C; F23C10/00; F23C10/18; F23C10/24; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
137 words
A fluidized bed unit comprising a housing, a fluid distributor plate disposed in said housing and dividing said housing into an upper chamber and a lower chamber, a bed of particulate material including fuel supported by said plate and extending in said upper chamber, said lower chamber having an inlet for receiving pressurized air for passing through said lower chamber, said plate and said bed of particulate material to fluidize said particulate material, an enclosure having an inlet communicating with said bed for receiving particulate material from said bed and an outlet for discharging said particulate material to external apparatus, an additional fluid distributor plate disposed in said enclosure over which said particulate material passes, and means for passing a cooling fluid through said additional plate and said particulate material in said enclosure to cool said material.
Claim 2
Dependent Claim
137 words
A fluidized bed unit comprising a housing, a fluid distributor plate disposed in said housing and dividing said housing into an upper chamber and a lower chamber, a bed of particulate material including fuel supported by said plate and extending in said upper chamber, said lower chamber having an inlet for receiving pressurized air for passing through said lower chamber, said plate and said bed of particulate material to fluidize said particulate material, an enclosure having an inlet communicating with said bed for receiving particulate material from said bed and an outlet for discharging said particulate material to external apparatus, an additional fluid distributor plate disposed in said enclosure over which said particulate material passes, and means for passing a cooling fluid through said additional plate and said particulate material in said enclosure to cool said material.
Claim 3
Dependent Claim
24 words
The unit of claim 1, wherein said cooling fluid passes through said enclosure and into said bed of particulate material in said upper chamber.
Claim 4
Dependent Claim
16 words
The unit of claim 1, wherein said cooling fluid is in the form of ambient air.
Claim 5
Dependent Claim
14 words
The unit of claim 1, wherein said enclosure is located in said lower chamber.
Claim 6
Dependent Claim
42 words
The unit of claim 1, wherein said enclosure is located in said upper chamber and is defined by one of the walls of said housing and a partition extending upwardly from said first-mentioned fluid distributor plate and parallel to said latter wall.
Claim 7
Dependent Claim
24 words
The unit of claim 5, wherein an opening is formed in said partition to define said inlet for receiving particulate material from said bed.
Claim 8
Dependent Claim
14 words
The unit of claim 1, wherein said enclosure is located externally of said housing.
Claim 9
Dependent Claim
19 words
The unit of claim 7, wherein said enclosure is defined in part by an outer wall of said housing.
Claim 10
Dependent Claim
27 words
The unit of claim 1, wherein said enclosure includes a duct portion extending through said lower chamber and said first-mentioned fluid distributor plate and defining said inlet.
Claim 11
Dependent Claim
25 words
The unit of claim 1, further comprising means for passing a cooling liquid in a heat exchange relation to the particulate material in said enclosure.
Claim 12
Dependent Claim
30 words
The unit of claim 10, wherein said means for passing a cooling liquid comprises at least one tube extending in said enclosure and means for passing water through said tube.
Claim 13
Dependent Claim
144 words
A fluidized bed unit comprising a housing, a fluid distributor plate disposed in said housing and dividing said housing into an upper chamber and a lower chamber, a bed of particulate material including fuel supported by said plate and extending in said upper chamber, said lower chamber having an inlet for receiving pressurized air for passing through said lower chamber, said plate and said bed of particulate material to fluidize said particulate material, an enclosure for receiving a portion of the particulate material from said bed, means for passing a cooling fluid through said portion of the particulate material in the enclosure to cool said material, means for directing said cooling fluid from said enclosure into said bed of particulate material in said upper chamber, and means for passing a cooling liquid in a heat exchange relation to the particulate material in said enclosure.
Claim 14
Dependent Claim
144 words
A fluidized bed unit comprising a housing, a fluid distributor plate disposed in said housing and dividing said housing into an upper chamber and a lower chamber, a bed of particulate material including fuel supported by said plate and extending in said upper chamber, said lower chamber having an inlet for receiving pressurized air for passing through said lower chamber, said plate and said bed of particulate material to fluidize said particulate material, an enclosure for receiving a portion of the particulate material from said bed, means for passing a cooling fluid through said portion of the particulate material in the enclosure to cool said material, means for directing said cooling fluid from said enclosure into said bed of particulate material in said upper chamber, and means for passing a cooling liquid in a heat exchange relation to the particulate material in said enclosure.
Claim 15
Dependent Claim
12 words
The unit of claim 12, wherein said cooling fluid is ambient air.
Claim 16
Dependent Claim
14 words
The unit of claim 12, wherein said enclosure is located in said lower chamber.
Claim 17
Dependent Claim
39 words
The unit of claim 12, wherein said enclosure is located in said upper chamber and is defined by one of the walls of said housing and a partition extending upwardly from said plate and parallel to said latter wall.
Claim 18
Dependent Claim
24 words
The unit of claim 15, wherein an opening is formed in said partition for withdrawing a portion of the particulate matter from said bed.
Claim 19
Dependent Claim
14 words
The unit of claim 12, wherein said enclosure is located externally of said housing.
Claim 20
Dependent Claim
17 words
The unit of claim 12, wherein said enclosure is located adjacent an outer wall of said housing.
Claim 21
Dependent Claim
24 words
The unit of claim 12, wherein said enclosure includes a duct portion extending through said lower chamber and said plate and defining said inlet.
Claim 22
Dependent Claim
30 words
The unit of claim 12, wherein said means for passing a cooling liquid comprises at least one tube extending in said enclosure and means for passing water through said tube.
Claim 23
Dependent Claim
20 words
The unit of claim 12, further comprising means for passing said cooled material to external handling equipment for said material.
Claim 24
Independent Claim
67 words
A method of operating a fluidized bed comprising the steps of supporting a bed of particulate material including fuel in a housing, passing air through said bed of particulate material to fluidize said particulate material, withdrawing a portion of the particulate material from said bed to a fluid distribution plate, and passing air through said fluid distribution plate and said withdrawn material to cool said withdrawn material.
Claim 25
Independent Claim
67 words
A method of operating a fluidized bed comprising the steps of supporting a bed of particulate material including fuel in a housing, passing air through said bed of particulate material to fluidize said particulate material, withdrawing a portion of the particulate material from said bed to a fluid distribution plate, and passing air through said fluid distribution plate and said withdrawn material to cool said withdrawn material.
Claim 26
Dependent Claim
21 words
The method of claim 22, further comprising the step of passing said cooled material to external handling equipment for said material.
Claim 27
Dependent Claim
21 words
The method of claim 22, wherein said air passed through said fluid distributor plate and said withdrawn material is ambient air.
Claim 28
Dependent Claim
16 words
The method of claim 22 or 24, wherein said fluid distributor plate is in an enclosure.
Claim 29
Dependent Claim
28 words
The method of claim 22 or 24, further comprising the step of passing said ambient air from said enclosure into said bed of particulate material in said housing.
Claim 30
Independent Claim
28 words
The method of claims 24, wherein said step of cooling comprises the step of passing liquid through tubes located in a heat exchange relation to said withdrawn material.
Claim 31
Dependent Claim
21 words
The method of claim 22, wherein said portion of particulate material is withdrawn to an enclosure located externally of said housing.
Claim 32
Dependent Claim
20 words
The method of claim 22, wherein said portion of particulate material is withdrawn to an enclosure located within said housing.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |