US3716003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid fuel combustion systems
Assignee: COAL IND PATENT Ltd
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Filing: 1971-03-29
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Granted: 1973-02-13
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Expires: 1991-03-29
Abstract
Abstract A particulate solid fuel combustion system includes a fluidized bed combustor adapted to contain a fluidized bed of inert particles in the lower region thereof. Particulate solid fuel is introduced into the bed to be burnt therein and exhaust gases derived from the combustion of the fuel are passed to a vortex combustion chamber included in the system. Fine particles of combustile material entrained in the gases are burnt within the vortex combustion chamber while relatively larger particles of combustile material are removed from the chamber to be reintroduced to the combustor at or adjacent the surface level of the fluidized bed contained therein. The invention also includes a method of operating the combustion system.
Inventors
- 👤 W Battcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:36
CPC Classifications
F; F23; F23C; F23C10/00; F23C10/02; F23C10/04; F23C10/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A particulate solid fuel combustion system including a combustor, a relatively upper region and a relatively lower region in the combustor, the relatively lower region being adapted, in use, to contain a fluidized bed of particulate material to a desired level therein, a vortex combustion chamber, an upper inlet portion and a material discharge outlet in the said chamber, the inlet portion of the chamber being in communication with the said relatively upper region of the combustor, a conduit extending from the material discharge outlet of the chamber to the said relatively lower region of the combustor adjacent, in use, the desired bed level, and ejector means incorporated in the conduit.
Claim 2
Dependent Claim
111 words
A particulate solid fuel combustion system including a combustor, a relatively upper region and a relatively lower region in the combustor, the relatively lower region being adapted, in use, to contain a fluidized bed of particulate material to a desired level therein, a vortex combustion chamber, an upper inlet portion and a material discharge outlet in the said chamber, the inlet portion of the chamber being in communication with the said relatively upper region of the combustor, a conduit extending from the material discharge outlet of the chamber to the said relatively lower region of the combustor adjacent, in use, the desired bed level, and ejector means incorporated in the conduit.
Claim 3
Dependent Claim
111 words
A particulate solid fuel combustion system including a combustor, a relatively upper region and a relatively lower region in the combustor, the relatively lower region being adapted, in use, to contain a fluidized bed of particulate material to a desired level therein, a vortex combustion chamber, an upper inlet portion and a material discharge outlet in the said chamber, the inlet portion of the chamber being in communication with the said relatively upper region of the combustor, a conduit extending from the material discharge outlet of the chamber to the said relatively lower region of the combustor adjacent, in use, the desired bed level, and ejector means incorporated in the conduit.
Claim 4
Dependent Claim
111 words
A particulate solid fuel combustion system including a combustor, a relatively upper region and a relatively lower region in the combustor, the relatively lower region being adapted, in use, to contain a fluidized bed of particulate material to a desired level therein, a vortex combustion chamber, an upper inlet portion and a material discharge outlet in the said chamber, the inlet portion of the chamber being in communication with the said relatively upper region of the combustor, a conduit extending from the material discharge outlet of the chamber to the said relatively lower region of the combustor adjacent, in use, the desired bed level, and ejector means incorporated in the conduit.
Claim 5
Dependent Claim
20 words
A system according to claim 1 wherein the combustion chamber is located within the relatively upper region of the combustor.
Claim 6
Dependent Claim
43 words
A system according to claim 2 including directional vanes located in the upper inlet portion of the vortex combustion chamber, the vanes being spaced apart peripherally of the chamber whereby, in use, a vortical flow is induced in the chamber by the vanes.
Claim 7
Dependent Claim
34 words
A system according to claim 2 wherein the conduit extends substantially vertically downwardly within the combustor, and the conduit is connected to the material discharge outlet of the vortex combustion chamber substantially tangentially thereto.
Claim 8
Dependent Claim
17 words
A system according to claim 1 wherein the vortex combustion chamber is located externally of the combustor.
Claim 9
Dependent Claim
50 words
A system according to claim 5 including an outlet in the relatively upper region of the combustor, and a duct interconnecting the said outlet of the combustor and the said upper inlet portion of the vortex combustion chamber, the duct being connected to the upper inlet portion substantially tangentially thereto.
Claim 10
Dependent Claim
42 words
A system as claimed in claim 5 wherein the conduit is connected to the material discharge outlet of the vortex combustion chamber substantially tangentially thereto, the conduit extending into said relatively lower region of the combustor adjacent to the desired bed level.
Claim 11
Dependent Claim
28 words
A system as claimed in claim 1 wherein the ejector means extends into the conduit axially thereof, downstream of the material discharge outlet of the vortex combustion chamber.
Claim 12
Dependent Claim
45 words
A system as claimed in claim 1 wherein the ejector means comprises a tubular member adapted to receive a higher pressure flow of a gaseous medium therethrough, whereby the flow induces and entrains material discharged through the material discharge outlet of the vortex combustion chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |