US4036153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid bed incinerator feed system
Assignee: Dorr Oliver Inc
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Filing: 1975-07-03
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Granted: 1977-07-19
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Expires: 1995-07-03
Abstract
Abstract A fluidized bed incinerator is provided with feed pipes which are downwardly directed or vertically oriented and have access to the reaction chamber. Secondary air is introduced into the reaction chamber at a point above the fluidized bed through pipes which are concentric with the feed pipes and spaced therefrom in surrounding relation to define annular air passageways. Air passing into the reaction chamber through these passageways provides an air shield about the feed pipes.
Inventors
- 👤 Robin Gustav Nauta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:40
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/0015; B01J8/003; F; F23; F23G; F23G5/00; F23G5/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A fluid bed unit comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox, vertically disposed feed means for conducting feed into said reaction chamber, said feed means extending into said reaction chamber through the top of said fluid bed unit and terminating close to and above the level of the fluidized body of particulate solids in said reaction chamber and at least one secondary air supply pipe surrounding and concentric with said feed pipe but spaced therefrom so that an annular air passage is provided between said pipes for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids.
Claim 2
Dependent Claim
143 words
A fluid bed unit comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox, vertically disposed feed means for conducting feed into said reaction chamber, said feed means extending into said reaction chamber through the top of said fluid bed unit and terminating close to and above the level of the fluidized body of particulate solids in said reaction chamber and at least one secondary air supply pipe surrounding and concentric with said feed pipe but spaced therefrom so that an annular air passage is provided between said pipes for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids.
Claim 3
Dependent Claim
200 words
A fluid bed incinerator comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox through a fluidizing air conduit, a feed bin located on top of said incinerator to contain combustible feed, feed screws positioned horizontally in the bottom of said feed bin to convey said combustible feed to a plurality of vertically disposed feed pipes, said feed pipes extending into said reaction chamber through the top of said incinerator and terminating close to and above said fluidized body of particulate solids, each of said feed pipes being surrounded by and concentric with a secondary air pipe connected to said air supply means, each secondary air pipe being spaced from the feed pipe with which it cooperates to thereby provide an annular air passage therebetween for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids and each of said annular air passages having a constriction adjacent the end thereof to increase air velocity at that point.
Claim 4
Dependent Claim
200 words
A fluid bed incinerator comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox through a fluidizing air conduit, a feed bin located on top of said incinerator to contain combustible feed, feed screws positioned horizontally in the bottom of said feed bin to convey said combustible feed to a plurality of vertically disposed feed pipes, said feed pipes extending into said reaction chamber through the top of said incinerator and terminating close to and above said fluidized body of particulate solids, each of said feed pipes being surrounded by and concentric with a secondary air pipe connected to said air supply means, each secondary air pipe being spaced from the feed pipe with which it cooperates to thereby provide an annular air passage therebetween for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids and each of said annular air passages having a constriction adjacent the end thereof to increase air velocity at that point.
Claim 5
Dependent Claim
155 words
A fluid bed unit comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox, vertically disposed feed means for conducting feed into said reaction chamber, said feed means extending into said reaction chamber through the top of said fluid bed unit and terminating close to and above the level of the fluidized body of particulate solids in said reaction chamber, at least one secondary air supply pipe surrounding and concentric with said feed pipe but spaced therefrom so that an annular air passage is provided between said pipes for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids and a constriction in said annular air passage adjacent the discharge end thereof.
Claim 6
Dependent Claim
155 words
A fluid bed unit comprising a reaction chamber, a windbox separated from said reaction chamber by a constriction plate, a body of particulate solids subject to fluidization on said constriction plate, air supply means for introducing fluidizing air into said windbox, vertically disposed feed means for conducting feed into said reaction chamber, said feed means extending into said reaction chamber through the top of said fluid bed unit and terminating close to and above the level of the fluidized body of particulate solids in said reaction chamber, at least one secondary air supply pipe surrounding and concentric with said feed pipe but spaced therefrom so that an annular air passage is provided between said pipes for downwardly discharging a secondary air supply into said reaction chamber at a level close to and above, but directed toward, the fluidized body of particulate solids and a constriction in said annular air passage adjacent the discharge end thereof.
Claim 7
Dependent Claim
29 words
The fluid bed unit of claim 3, wherein said constriction of said air passage is formed by a flared portion on said discharge end of said secondary air pipe.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |