US4089631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal-burning gas turbine combustion system for reducing turbine erosion
Assignee: General Electric Co
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Filing: 1976-09-23
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Granted: 1978-05-16
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Expires: 1996-09-23
Abstract
Abstract Gas-fluidized ground coal, and coal dust slurried with fuel oil, are supplied to a reverse flow cyclone combustor which provides the functions of combustion and particulate removal. Coal dust borne by the fluidizing gas is passed through a cyclone scrubber utilizing fuel oil, and the resulting slurry is introduced into the combustor adjacent the inner surface of the combustor wall. Only the finest coal dust is employed in the slurry, to minimize oil consumption. Separative performance of the combustor is enhanced by introducing combustion air centrally adjacent the combustor outlet and gas-borne ground coal directly onto the cyclone walls.
Inventors
- 👤 Walter B. Giles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:35
CPC Classifications
F; F23; F23C; F23C1/00; F23C1/10; F23C3/00; F23C3/006; F23C3/008; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/027; F23K; F23K1/00; F23K1/02; F23K3/00; F23K3/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
97 words
A combustion system for burning coal comprising: combustor means including a substantially conical-to-cylindrical surface; a fluidized bed of ground coal; mixing means combining a liquid fuel with elutriated coal fines from said fluidized bed to form a slurry; means coupling said mixing means to said cyclone combustor means for supplying said slurry adjacent the inner surface of said cyclone combustor means; and means coupling said fluidized bed to said cyclone combustor means for supplying ground coal particles above a predetermined size from said fluidized bed to a region radially-inward of said slurry in said cyclone combustion means.
Claim 2
Dependent Claim
97 words
A combustion system for burning coal comprising: combustor means including a substantially conical-to-cylindrical surface; a fluidized bed of ground coal; mixing means combining a liquid fuel with elutriated coal fines from said fluidized bed to form a slurry; means coupling said mixing means to said cyclone combustor means for supplying said slurry adjacent the inner surface of said cyclone combustor means; and means coupling said fluidized bed to said cyclone combustor means for supplying ground coal particles above a predetermined size from said fluidized bed to a region radially-inward of said slurry in said cyclone combustion means.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein said mixing means comprises a cyclone scrubber.
Claim 4
Dependent Claim
12 words
The apparatus of claim 1 wherein said liquid fuel comprises fuel oil.
Claim 5
Dependent Claim
22 words
The apparatus of claim 1 wherein said ground coal in said fluidized particulate bed is intermixed with particles absorbent to sulfur dioxide.
Claim 6
Dependent Claim
46 words
In a cyclone combustion system, a method of burning coal comprising: combining a liquid fuel with coal fines to form a slurry; introducing said slurry along the inner surface of a cyclone combustor; and supplying ground coal particles radially-inward of said slurry in said cyclone combustor.
Claim 7
Dependent Claim
46 words
In a cyclone combustion system, a method of burning coal comprising: combining a liquid fuel with coal fines to form a slurry; introducing said slurry along the inner surface of a cyclone combustor; and supplying ground coal particles radially-inward of said slurry in said cyclone combustor.
Claim 8
Dependent Claim
24 words
The method of claim 5 wherein the step of combining a liquid fuel with coal fines comprises scrubbing said coal fines with fuel oil.
Claim 9
Dependent Claim
20 words
The method of claim 5 including the step of recirculating unburned vapors in said system back into said cyclone combustor.
Claim 10
Dependent Claim
43 words
The method of claim 5 including the step of pressurizing a fluidized bed of ground coal with base purge gases from said cyclone combustion system so as to provide said coal fines and said ground coal particles for consumption in said cyclone combustor.
Claim 11
Dependent Claim
16 words
The method of claim 8 wherein said base purge gases are recirculated to said cyclone combustor.
Claim 12
Dependent Claim
110 words
A cyclone combustor comprising: a vertically-oriented combustion chamber including at least a substantially conical wall of diameter increasing with height over a predetermined height range from a minimum diameter to a maximum diameter; a base plug situated centrally at the bottom of said combination chamber and extending upward therein, said plug being located radially-inward of said wall so as to allow clearance therebetween; means for introducing solid fuel in ground fluidized form at the top of said combustion chamber directed tangentially into said chamber; and means for introducing air at the top of said combustion chamber directed tangentially into said chamber radially-inward of where said solid fuel is introduced therein.
Claim 13
Dependent Claim
110 words
A cyclone combustor comprising: a vertically-oriented combustion chamber including at least a substantially conical wall of diameter increasing with height over a predetermined height range from a minimum diameter to a maximum diameter; a base plug situated centrally at the bottom of said combination chamber and extending upward therein, said plug being located radially-inward of said wall so as to allow clearance therebetween; means for introducing solid fuel in ground fluidized form at the top of said combustion chamber directed tangentially into said chamber; and means for introducing air at the top of said combustion chamber directed tangentially into said chamber radially-inward of where said solid fuel is introduced therein.
Claim 14
Dependent Claim
24 words
The cyclone combustor of claim 10 wherein the portion of said base plug extending upward into said combustion chamber is of substantially conical shape.
Claim 15
Dependent Claim
15 words
The cyclone combustor of claim 10 including a slag collection chamber beneath said combustion chamber.
Claim 16
Dependent Claim
27 words
The cyclone combustor of claim 12 including means for conveying gases from said slag collection chamber to said means for introducing solid fuel into said combustion chamber.
Claim 17
Dependent Claim
23 words
The cyclone combustor of claim 11 wherein said wall is of said maximum diameter for an additional height above said predetermined height range.
Claim 18
Dependent Claim
37 words
The cyclone combustor of claim 14 including a slag collection chamber beneath said combustion chamber, and means for conveying gases from said slag collection chamber to said means for introducing a solid fuel into said combustion chamber.
Claim 19
Dependent Claim
49 words
The cyclone combustor of claim 10 including means for introducing a slurry of fuel at the top of said combustion chamber directed tangentially into said chamber along the wall thereof radially-outward of solid fuel in ground fluidized form, said slurry comprising fine solid fuel particles in a liquid fuel.
Claim 20
Dependent Claim
24 words
The cyclone combustor of claim 16 wherein the portion of said base plug extending upward into said combustion chamber is of substantially conical shape.
Claim 21
Dependent Claim
15 words
The cyclone combustor of claim 16 including a slag collection chamber beneath said combustion chamber.
Claim 22
Dependent Claim
27 words
The cyclone combustor of claim 18 including means for conveying gases from said slag collection chamber to said means for introducing solid fuel into said combustion chamber.
Claim 23
Dependent Claim
23 words
The cyclone combustor of claim 17 wherein said wall is of said maximum diameter for an additional height above said predetermined height range.
Claim 24
Dependent Claim
37 words
The cyclone combustor of claim 20 including a slag collection chamber beneath said combustion chamber, and means for conveying gases from said slag collection chamber to said means for introducing a solid fuel into said combustion chamber.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |