US3986848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas reheating system using hot precipitator
Assignee: Combustion Engineering Inc
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Filing: 1975-12-22
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Granted: 1976-10-19
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Expires: 1995-12-22
Abstract
Abstract A gas handling and cleaning system for the combustion gases of a coal-fired steam generator comprises an electrostatic precipitator which receives the combustion gases from the steam generator, a preheater downstream of the electrostatic precipitator and a wet scrubber intermediately positioned between the preheater and the stack. The temperature and humidity of the gases entering the stack are controlled by conveying regulated quantities of the gases from the exit of both the precipitator and the preheater to a location intermediate the scrubber and the stack.
Inventors
- 👤 Brooks Mason Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:45
CPC Classifications
F; F23; F23J; F23J15/00; B; B01; B01D; B01D53/00; B01D53/34; B03; B03C; B03C3/00; B03C3/017; F23L; F23L15/00; F23J2900/00; F23J2900/15004; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10S; Y10S122/00; Y10S122/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
In combination with a coal-fired steam generator system a combustion gas handling and cleaning system including an electrostatic precipitator, an air heater, a wet scrubber, and a stack connected in series flow relation in the order named receiving the combustion gases from the discharge of the steam generator, means for bypassing a portion of the combustion gases from a location intermediate the electrostatic precipitator and the air heater to a location intermediate the scrubber and the stack and means for regulating the quantity of gases thus bypassed.
Claim 2
Dependent Claim
87 words
In combination with a coal-fired steam generator system a combustion gas handling and cleaning system including an electrostatic precipitator, an air heater, a wet scrubber, and a stack connected in series flow relation in the order named receiving the combustion gases from the discharge of the steam generator, means for bypassing a portion of the combustion gases from a location intermediate the electrostatic precipitator and the air heater to a location intermediate the scrubber and the stack and means for regulating the quantity of gases thus bypassed.
Claim 3
Dependent Claim
47 words
The system of claim 1 wherein the means for bypassing said combustion gases includes a bypass duct and a fan positioned in said duct for effecting the bypass of said gases to said duct and said means for regulating includes a damper positioned in said bypass duct.
Claim 4
Dependent Claim
18 words
The system of claim 2 including an induced draft fan intermediate the air heater and the wet scrubber.
Claim 5
Dependent Claim
42 words
The system of claim 3 including a bypass duct connected intermediate the induced draft fan and the scrubber and intermediate the scrubber and the stack to effectively bypass combustion gases around said scrubber, and means for regulating flow through said bypass duct.
Claim 6
Dependent Claim
110 words
In a power plant system utilizing a coal-fired steam generator and having a combustion gas handling system wherein the gas progressively traverses an electrostatic precipitator, an air heater, and a wet scrubber after which it is conveyed to a suitable stack, the method of controllably reheating the gases after they have passed through the wet scrubber and prior to being introduced into the stack by bypassing the air heater and the wet scrubber with a portion of the gases and regulating the portion thus bypassed whereby the hot gases upstream from the precipitator are introduced into the gas stream entering the stack to thereby raise the temperature of the same.
Claim 7
Dependent Claim
110 words
In a power plant system utilizing a coal-fired steam generator and having a combustion gas handling system wherein the gas progressively traverses an electrostatic precipitator, an air heater, and a wet scrubber after which it is conveyed to a suitable stack, the method of controllably reheating the gases after they have passed through the wet scrubber and prior to being introduced into the stack by bypassing the air heater and the wet scrubber with a portion of the gases and regulating the portion thus bypassed whereby the hot gases upstream from the precipitator are introduced into the gas stream entering the stack to thereby raise the temperature of the same.
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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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |