US4164124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine system using unclean fuel
Assignee: Combustion Turbine Power Inc
•
Filing: 1976-11-22
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Granted: 1979-08-14
•
Expires: 1996-11-22
Abstract
Abstract Unclean fuel, such as coal is reduced to particle size passing 200 mesh in an attrition mill. Pyrite and ash removal is performed in conjunction with the attrition milling. The resulting fine particles are combusted in the turbine exhaust gas and the products of combustion indirectly heat the turbine operating gas. Control is provided by bypass around the heat exchanger and/or auxiliary clean fuel combustion.
Inventors
- 👤 David W. Taylor
- 👤 Garland L. Fulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/26; F02C1/00; F02C1/04; F02C1/05; F02C1/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
A turbine system which includes a compressor and means for supplying the output from the compressor to the turbine as its operating gas, the system comprising: means including a fluid energy attrition mill for providing unclean particulate fuel with particle sizes substantially 100% passing 200 mesh, the attrition mill including a toroidal loop; means for removing from the unclean fuel a substantial proportion of pyrites contained in the fuel, the removing means being a by-pass circuit coupled to the attrition mill, the by-pass circuit including a tap-off from a high pressure region of the toroidal loop and return tap to the low pressure region; means for combusting the fuel with pyrites removed in exhaust gas from the turbine at a flame temperature not in excess of 2600° F.; means for utilizing the output of the combustion means to indirectly heat turbine operating gas; and means for supplying mill operating gas to the attrition mill, the mill operating gas being steam produced by an indirect heating means supplied with the output of the combustion means after utilization in the utilizing means.
Claim 2
Dependent Claim
180 words
A turbine system which includes a compressor and means for supplying the output from the compressor to the turbine as its operating gas, the system comprising: means including a fluid energy attrition mill for providing unclean particulate fuel with particle sizes substantially 100% passing 200 mesh, the attrition mill including a toroidal loop; means for removing from the unclean fuel a substantial proportion of pyrites contained in the fuel, the removing means being a by-pass circuit coupled to the attrition mill, the by-pass circuit including a tap-off from a high pressure region of the toroidal loop and return tap to the low pressure region; means for combusting the fuel with pyrites removed in exhaust gas from the turbine at a flame temperature not in excess of 2600° F.; means for utilizing the output of the combustion means to indirectly heat turbine operating gas; and means for supplying mill operating gas to the attrition mill, the mill operating gas being steam produced by an indirect heating means supplied with the output of the combustion means after utilization in the utilizing means.
Claim 3
Dependent Claim
27 words
The system of claim 1 wherein the fuel providing means further includes means for providing to the attrition mill particulate fuel of about minus 1/8 mesh size.
Claim 4
Dependent Claim
13 words
The system of claim 1 further including solid separating means between the taps.
Claim 5
Dependent Claim
12 words
The system of claim 3 wherein the separator means is a cyclone.
Claim 6
Dependent Claim
22 words
The system of claim 1 further comprising means for controllably bypassing a portion of the compressor output around the indirect heating means.
Claim 7
Dependent Claim
19 words
The system of claim 5 wherein the bypassing means includes a controllable valve means for varying the bypass proportion.
Claim 8
Dependent Claim
20 words
The system of claim 6 wherein the controllable valve means includes two separate valves connected in parallel with each other.
Claim 9
Dependent Claim
16 words
The system of claim 7 wherein one valve has much smaller variable capacity than the other.
Claim 10
Dependent Claim
10 words
The system of claim 1 wherein the fuel is coal.
Claim 11
Dependent Claim
17 words
The system of claim 9 comprising means for at least partially gasifying the coal with pyrite removed.
Claim 12
Dependent Claim
19 words
The system of claim 9 comprising means for placing the coal with pyrite removed in suspension with fuel oil.
Claim 13
Dependent Claim
19 words
The system of claim 1 wherein steam used as mill operating gas accompanies the fuel into the combusting means.
Claim 14
Dependent Claim
19 words
The system of claim 1 wherein the flame temperature in the combusting means is no higher than 2000° F.
References Cited (Backward Citations)
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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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |