Patent US4928635A successfully refreshed from Google Patents.
US4928635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power plant and method of retrofitting existing power plants
Assignee: Individual
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Filing: 1989-07-20
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Granted: 1990-05-29
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Expires: 2009-07-20
Abstract
Abstract A power plant including a coal-fired boiler, having a boiler space, heat exchanging means for generating steam, one or more air ports and exhaust means. The power plant also includes an internal combustion engine having an exhaust means, wherein the exhaust means of the engine are connected to the air ports of the boiler. A thermal NO x reduction system is disposed in the boiler for reducing the NO x content of both the internal combustion engine and boiler emissions. The engine further includes water cooling means, and heat is transferred from the engine to the heat exchanging means for generating steam. The exhaust means are connected to the boiler space either by secondary air ports adjacent or surrounding the coal nozzles of the boiler, by overfire air ports, by underfire air ports or by any combination of these ports. Means are preferably provided for removing SO 2 and particulate pollutants from the exhaust of the boiler.
Inventors
- 👤 Mack Shelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:21
CPC Classifications
F; F22; F22B; F22B33/00; F22B33/18; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/065; F23; F23L; F23L2900/00; F23L2900/07002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A power plant comprising: a. a coal-fired boiler, having a boiler space, heat exchanging means for generating steam, one or more air ports and exhaust means; b. an internal combustion engine, having an exhaust means, wherein the exhaust means of the engine are connected to the air ports of the boiler; c. a thermal NO x reduction system disposed in said boiler; d. steam generation means operably connected to said boiler.
Claim 2
Dependent Claim
71 words
A power plant comprising: a. a coal-fired boiler, having a boiler space, heat exchanging means for generating steam, one or more air ports and exhaust means; b. an internal combustion engine, having an exhaust means, wherein the exhaust means of the engine are connected to the air ports of the boiler; c. a thermal NO x reduction system disposed in said boiler; d. steam generation means operably connected to said boiler.
Claim 3
Independent Claim
65 words
A method of retrofiting a coal-fired power plant having a boiler space, heat exchanging means for generating steam, an air port and exhaust means, comprising: a. providing an internal combustion engine for generating power having an exhaust; b. providing thermal means for reducing NO x in the boiler space; c. connecting the exhaust of the internal combustion engine with the air port of the boiler.
Claim 4
Independent Claim
65 words
A method of retrofiting a coal-fired power plant having a boiler space, heat exchanging means for generating steam, an air port and exhaust means, comprising: a. providing an internal combustion engine for generating power having an exhaust; b. providing thermal means for reducing NO x in the boiler space; c. connecting the exhaust of the internal combustion engine with the air port of the boiler.
Claim 5
Dependent Claim
33 words
A power plant according to claim 1, wherein said internal combustion engine further comprises water cooling means, and wherein waste heat from said water cooling means is introduced into said steam generation means.
Claim 6
Dependent Claim
31 words
A power plant according to claim 1, wherein said boiler is a pulverized coal boiler, and said air ports comprise primary air ports for providing primary air to said boiler space.
Claim 7
Dependent Claim
22 words
A power plant according to claim 1, said air ports comprise secondary air ports for providing secondary air to said boiler space.
Claim 8
Dependent Claim
22 words
A power plant according to claim 1, wherein said air ports comprise overfire ports for supplying overfire air to said boiler space.
Claim 9
Dependent Claim
22 words
A power plant according to claim 1, wherein said air ports comprise underfire ports for supplying underfire air to said boiler space.
Claim 10
Dependent Claim
24 words
A power plant according to claim 1, wherein said exhaust means for the boiler further comprises means for removing SO 2 from said emission.
Claim 11
Dependent Claim
21 words
A power plant according to claim 1, wherein said exhaust means for the boiler further comprises means for removing particulate pollutants.
Claim 12
Dependent Claim
46 words
A power plant according to claim 1, wherein said internal combustion engine further comprises water cooling means, and wherein the water cooling means are operably connected with said heat exchanging means so that heat from said water cooling means is transferred to said heat exchanging means.
Claim 13
Dependent Claim
34 words
A method according to claim 2, further comprising the steps of providing water cooling means for cooling said internal combustion engine, and transferring heat from the water cooling means to the heat exchanging means.
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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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |