US4335661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed heat exchanger having an air assisted bed drain
Assignee: Foster Wheeler Energy Corp
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Filing: 1980-09-24
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Granted: 1982-06-22
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Expires: 2000-09-24
Abstract
Abstract A fluidized bed heat exchanger in which a perforated plate is disposed within a housing for supporting a bed of particulate material. Air is passed through the plate to fluidize the particulate material and nozzles are provided for distributing air across the inlet end of a drain pipe for the spent particulate material to insure a continuous draining of the material.
Inventors
- 👤 Robert D. Stewart
- 👤 Thomas E. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
F; F23; F23C; F23C10/00; F23C10/18; F23C10/24; B; B01; B01J; B01J8/00; B01J8/0015; B01J8/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A fluidized bed heat exchanger comprising a perforated plate adapted to support a bed of particulate material, means for introducing air through the perforations to fluidize said particulate material, means for introducing additional particulate material to said bed, a drain pipe communicating with said bed for discharging spent particulate material from said bed, and means for discharging air over the inlet of said drain pipe to promote the flow of spent material into said pipe, the air discharging means comprising a plurality of nozzles each defined by a pipe having a first portion extending up from said plate and a second portion extending at an angle to said first portion and over said inlet of said drain pipe.
Claim 2
Dependent Claim
118 words
A fluidized bed heat exchanger comprising a perforated plate adapted to support a bed of particulate material, means for introducing air through the perforations to fluidize said particulate material, means for introducing additional particulate material to said bed, a drain pipe communicating with said bed for discharging spent particulate material from said bed, and means for discharging air over the inlet of said drain pipe to promote the flow of spent material into said pipe, the air discharging means comprising a plurality of nozzles each defined by a pipe having a first portion extending up from said plate and a second portion extending at an angle to said first portion and over said inlet of said drain pipe.
Claim 3
Dependent Claim
22 words
The heat exchanger of claim 1 wherein said inlet of said drain pipe registers with an opening extending through said perforated plate.
Claim 4
Dependent Claim
20 words
The heat exchanger of claim 1 wherein said air introducing means includes an air plenum extending below said perforated plate.
Claim 5
Dependent Claim
24 words
The heat exchanger of claim 1 wherein said nozzles extend through openings formed through said plate and receive said air from said air plenum.
Claim 6
Dependent Claim
27 words
The heat exchanger of claim 1 wherein said air discharging means is constructed and arranged to direct the air generally towards the axis of said drain pipe.
Claim 7
Dependent Claim
41 words
The heat exchanger of claim 1 further comprising a plurality of air distributors extending upwardly from said plate and registering with said perforations for receiving said fluidized air and discharging said air into said bed at a plane above said plate.
Claim 8
Dependent Claim
40 words
The heat exchanger of claim 6 wherein the length of said air distributors are such that the material accumulating above said plate and below the discharge ends of said distributors insulates said plate from the high temperature in said bed.
References Cited (Backward Citations)
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Cited
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Cited
US3881857A
Cited
US4177742A
Cited
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Cited
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Cited
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |