US3873845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing electric energy including coal gasification
Assignee: Heinrich Koppers GmbH
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Filing: 1973-09-18
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Granted: 1975-03-25
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Expires: 1993-09-18
Abstract
Abstract Chunk coal is comminuted to form coal dust, or existing coal dust is utilized. The coal dust is advanced in concurrent flow with a stream of heated air, and is gasified at atmospheric pressure and at a temperature of substantially 1,500*C. The resulting combustion gases are cooled by admitting them to a waste-heat boiler, to substantially 150*C and concurrently with this cooling effect steam is produced by heat exchange with the gases. At least some of the thus produced steam is utilized to generate electric energy at such times as the electric energy which can be generated with the aid of the steam is sufficient to meet demands. The cooled gases have dust electrostatically removed from them, and are thereupon compressed to a pressure of between 20-50 atmospheres, whereupon they are de-sulphurized. Some or all of the thus de-sulphurized compressed gases are used to generate additional electric energy, but only at such times as the demand for electric energy exceeds the amount which can be generated with the aid of the steam produced by the combustion gases. Any compressed and desulphurized gases which are not used for the production of additional electric energy are subjected to further processing.
Inventors
- 👤 Kaspar Heinrich Osthaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/26; F02C3/28; C; C10; C10J; C10J3/00; C10J3/72; C10J3/82; C10J3/84; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/067; C10J2300/00; C10J2300/09; C10J2300/0903; C10J2300/0909; C10J2300/0913; C10J2300/093; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0973; C10J2300/0976; C10J2300/12; C10J2300/1253; C10J2300/16; C10J2300/1603; C10J2300/1606; C10J2300/1671; C10J2300/18; C10J2300/1846; C10J2300/1861; C10J2300/1884; C10J2300/1892; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y02E20/18; Y02E20/32; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
IN A DIFFERENTIAL-CYCLE METHOD OF PRODUCING ELECTRIC ENERGY FOR PEAK AND OFF-PEAK DEMAND CONDITIONS, THE STEPS OF ADVANCING COAL DUST IN CONCURRENT FLOW WITH A STREAM OF HEATED AIR, AND EFFECTING ITS GASIFICATION AT ATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF SUBSTANTIALLY 1,500*C; COOLING THE RESULTING GASES IN A WASTE-HEAT BOILER TO SUBSTANTIALLY 150*C AND CONCURRENTLY PRODUCING STEAM BY HEAT EXCHANGE WITH SAID GASES; USING ONLY THE THUS PRODUCED STEAM TO GENERATE ELECTRIC ENERGY AT SUCH TIMES AS THE ELECTRIC ENERGY WHICH CAN BE GENERATED WITH THE AID OF THE STEAM IS SUFFICIENT TO MEET OFFPEAK DEMANDS; REMOVING DUST ELECTROSTATICALLY FROM THE COOLED GASES, THEREUPON COMPRESSING THE LATTER TO A PRESSURE OF BETWEEN SUBSTANTIALLY 20 - 50 ATMOSPHERES, AND FINALLY DESULPHURIZING THE COMPRESSED GASES; AND USING AT LEAST SOME OF THE DE-SULPHURIZED COMPRESSED GASES TO GENERATE ADDITIONAL ELECTRIC ENERGY ONLY AT SUCH TIMES AS THE PEAK DEMAND FOR ELECTRIC ENERGY EXCEEDS THE AMOUNT THEREOF WHICH CAN BE GENERATED WITH THE AID OF THE STEAM PRODUCED BY COOLING SAID COMBUSTION GASES.
Claim 2
Dependent Claim
170 words
IN A DIFFERENTIAL-CYCLE METHOD OF PRODUCING ELECTRIC ENERGY FOR PEAK AND OFF-PEAK DEMAND CONDITIONS, THE STEPS OF ADVANCING COAL DUST IN CONCURRENT FLOW WITH A STREAM OF HEATED AIR, AND EFFECTING ITS GASIFICATION AT ATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF SUBSTANTIALLY 1,500*C; COOLING THE RESULTING GASES IN A WASTE-HEAT BOILER TO SUBSTANTIALLY 150*C AND CONCURRENTLY PRODUCING STEAM BY HEAT EXCHANGE WITH SAID GASES; USING ONLY THE THUS PRODUCED STEAM TO GENERATE ELECTRIC ENERGY AT SUCH TIMES AS THE ELECTRIC ENERGY WHICH CAN BE GENERATED WITH THE AID OF THE STEAM IS SUFFICIENT TO MEET OFFPEAK DEMANDS; REMOVING DUST ELECTROSTATICALLY FROM THE COOLED GASES, THEREUPON COMPRESSING THE LATTER TO A PRESSURE OF BETWEEN SUBSTANTIALLY 20 - 50 ATMOSPHERES, AND FINALLY DESULPHURIZING THE COMPRESSED GASES; AND USING AT LEAST SOME OF THE DE-SULPHURIZED COMPRESSED GASES TO GENERATE ADDITIONAL ELECTRIC ENERGY ONLY AT SUCH TIMES AS THE PEAK DEMAND FOR ELECTRIC ENERGY EXCEEDS THE AMOUNT THEREOF WHICH CAN BE GENERATED WITH THE AID OF THE STEAM PRODUCED BY COOLING SAID COMBUSTION GASES.
Claim 3
Dependent Claim
26 words
In a method as defined in claim 1, the preliminary step of producing said coal dust by subjecting coal chunks to a grinding and drying operation.
Claim 4
Dependent Claim
36 words
In a method as defined in claim 1; and further comprising the step of converting that amount of the compressed and de-sulphurized gas which is not required for generating of said additional electric energy, into hydrogen.
Claim 5
Dependent Claim
37 words
In a method as defined in claim 1; and further comprising the step of converting that amount of the compressed and de-sulphurized gas which is not required for generating of said additional electric energy, into ammonia-synthesis gas.
Claim 6
Dependent Claim
39 words
In a method as defined in claim 1; and further comprising the step of converting that amount of the compressed and de-sulphurized gas which is not required for generating of said additional electric energy, into hydrogen and ammonia-synthesis gas.
Claim 7
Dependent Claim
38 words
In a method as defined in claim 1; and further comprising the step of converting that amount of the compressed and de-sulphurized gas which is not required for generating of said additional electric energy, into a methane-rich gas.
Claim 8
Dependent Claim
33 words
In a method as defined in claim 1, wherein the step of using said steam to produce electric energy comprises driving a turbine with said steam, and driving a generator with said turbine.
Claim 9
Dependent Claim
74 words
In a method as defined in claim 1, wherein the step of using said compressed and de-sulphurized gases to generate electric energy comprises admitting said gases under pressure into a combustion chamber, combusting the gases to produce gaseous combustion products at substantially 1,500*C, admixing pressurized air with said combustion products to form therewith a mixture having a temperature of substantially 820*C, and driving with said mixture a turbine which is coupled with a generator.
Claim 10
Dependent Claim
31 words
In a method as defined in claim 1; further comprising using that amount of the steam which is not required for generating of electric energy, in one of the succeeding steps.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |