US3636896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid fuel combustion apparatus
Assignee: Coal Industry Patents Ltd
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Filing: 1970-05-12
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Granted: 1972-01-25
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Expires: 1990-05-12
Abstract
Abstract Combustion apparatus for burning solid fuel in particulate or divided form includes a plurality of air-permeable floor elements e.g., trays or membranes arranged within a housing. Each element is provided for supporting a fluidized bed of the solid fuel and in one form is inclined to assist the passage of material along the element. In another form of apparatus each element is horizontal and the passage of material along the tray is effected by the buildup of a hydraulic gradient between the feed end and the discharge end of each element. Gas-operated means are located adjacent the discharge end of one element and to feed end of an adjacent element, and are provided for transferring solid material from one element to an adjacent element. The elements may be in side-by-side relationship or they may be arranged one above the other, adjacent trays being either oppositely inclined relative to one another or horizontal and mutually parallel.
Inventors
- 👤 James Mclaren
- 👤 Walter Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
F; F23; F23C; F23C10/00; F23C10/002
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
121 words
Combustion apparatus comprising a housing, a gas-permeable floor element located in the housing and adapted in use to support a fluidized bed of solid material in particulate or divided form, a gaseous fluidizing medium inlet means, a solid material inlet in the housing, a gaseous fluidizing medium outlet in the housing, and a heat exchanger located within the housing, a plurality of said gas-permeable floor elements located within the housing, each element including a feed end and a discharge end, and gas-operated means in the form of a well adapted to raise said solid material from a location adjacent the discharge end of one element to the feed end of an adjacent element whereby material is deposited on the adjacent element.
Claim 2
Dependent Claim
121 words
Combustion apparatus comprising a housing, a gas-permeable floor element located in the housing and adapted in use to support a fluidized bed of solid material in particulate or divided form, a gaseous fluidizing medium inlet means, a solid material inlet in the housing, a gaseous fluidizing medium outlet in the housing, and a heat exchanger located within the housing, a plurality of said gas-permeable floor elements located within the housing, each element including a feed end and a discharge end, and gas-operated means in the form of a well adapted to raise said solid material from a location adjacent the discharge end of one element to the feed end of an adjacent element whereby material is deposited on the adjacent element.
Claim 3
Dependent Claim
40 words
Apparatus according to claim 1 wherein the floor elements are mutually parallel and are arranged at the same mean level within the housing, such that the discharge end of one element is adjacent the feed end of an adjacent element.
Claim 4
Dependent Claim
44 words
Apparatus according to claim 2 wherein the floor elements are positioned in close adjacency, adjacent elements being oppositely inclined relatively to one another, the lower end of each element forming the discharge end and the upper end of each element forming the feed end.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 1 wherein the elements are arranged in close adjacency, the elements being horizontally disposed within the housing.
Claim 6
Dependent Claim
70 words
Apparatus according to claim 1 wherein the gas-operated means in the form of a well comprises a first wall connecting with the discharge end of an element, a second wall connecting with the feed end of an adjacent element, and a base interconnecting the first wall and the second wall, said base including an inclined portion connecting with the first wall and a gas-permeable portion connecting with the second wall.
Claim 7
Dependent Claim
20 words
Apparatus according to claim 5 wherein an inlet for solid material is provided in the base of the gas-operated means.
Claim 8
Dependent Claim
28 words
Apparatus according to claim 5 comprising a baffle extending into the gas operated means, the lower end of the baffle being spaced from the base of said means.
Claim 9
Dependent Claim
93 words
Apparatus according to claim 5, comprising a further baffle situated superjacent the discharge end of each floor element the baffle extending downwards to a predetermined distance above said end and extending upwards to a level which is a predetermined distance below the required bed height, and a short gas-permeable portion provided in each element adjacent the discharge end, whereby material flow under the further baffle is controlled by variation of gaS flow rate through the portion so that a continuous stream of material is caused to flow over the top of the baffle.
Claim 10
Dependent Claim
19 words
Apparatus according to claim 1 wherein the floor elements are arranged at different levels with respect to one another.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 9 wherein each element is oppositely inclined to the superjacent and the subjacent element.
Claim 12
Dependent Claim
20 words
Apparatus according to claim 9 wherein each element is horizontal and is parallel to the superjacent and the subjacent elements.
Claim 13
Dependent Claim
76 words
Apparatus according to claim 9 comprising an upper and a lower floor element, the lower element extending across the lower region of the housing, a gas-permeable member attached at one of its ends to an end wall of the housing end at the other end to the feed end of the lower element, a first vertical wall located within the housing, the discharge end of the lower floor element being connected to the first vertical wall.
Claim 14
Dependent Claim
56 words
Apparatus according to claim 12 comprising a second vertical wall extending between the side walls of the housing, and a third vertical wall adjacent the inner end of the gas-permeable member, the upper floor element being connected at its feed end to the second vertical wall and at its discharge end to the third vertical wall.
Claim 15
Dependent Claim
55 words
Apparatus according to claim 13 comprising a horizontal wall extending from the first vertical wall, and a gas-permeable portion in the horizontal wall, said horizontal wall together with the upper portion of the first vertical wall and the lower portion of the second vertical wall defining the gas-operated means in the form of a well.
Claim 16
Dependent Claim
75 words
Apparatus according to claim 12 comprising a material discharge outlet located above and adjacent the gas-permeable member, and a gas inlet located below and adjacent said member, the discharge end of the upper element being in a positional relationship with said member whereby, in use, material leaving the upper element falls onto the member and a part of the material is discharged through said outlet by means of the gas introduced through said gas inlet.
Claim 17
Dependent Claim
17 words
Apparatus according to claim 9 comprising two pairs of floor elements arranged one pair above the other.
Claim 18
Dependent Claim
15 words
Apparatus according to claim 16 wherein adjacent elements are oppositely inclined relative to one another.
Claim 19
Dependent Claim
14 words
Apparatus according to claim 16 wherein the elements are horizontally disposed within the housing.
Claim 20
Dependent Claim
16 words
Apparatus according to claim 16 comprising means provided on the uppermost element adapted for recycling material.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |