US5326254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fog conditioned flue gas recirculation for burner-containing apparatus
Assignee: Individual
•
Filing: 1993-02-26
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Granted: 1994-07-05
•
Expires: 2013-02-26
Abstract
Abstract The disclosure is directed to a burner-containing apparatus, such as a boiler or a furnace, having reduced noxious emissions. A burner receives input air and has an exhaust for exhausting flue gases. A flue gas recirculation system is provided for recirculating a portion of the flue gases back to an input of the burner. A fogging device, which produces a fog from a fogger water supply and a fogger air supply, humidifies the recirculated flue gases.
Inventors
- 👤 Michael Munk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:07
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/003; F23C; F23C9/00; F23C9/08; F23J; F23J7/00; F23N2221/00; F23N2221/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
69 words
A burner-containing apparatus having reduced noxious emissions, comprising: a burner which receives input air and has an exhaust for exhausting flue gases; a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; means for humidifying the recirculated flue gases, said means comprising a fogging device which produces a fog from a fogger water supply and a fogger air supply.
Claim 2
Dependent Claim
69 words
A burner-containing apparatus having reduced noxious emissions, comprising: a burner which receives input air and has an exhaust for exhausting flue gases; a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; means for humidifying the recirculated flue gases, said means comprising a fogging device which produces a fog from a fogger water supply and a fogger air supply.
Claim 3
Dependent Claim
15 words
Apparatus as defined by claim 1, wherein said fogging device comprises an ultrasonic fogging device.
Claim 4
Dependent Claim
33 words
Apparatus as defined by claim 1, further comprising means for sensing the temperature of the humidified flue gases, and means for controlling the amount of fogging as a function of the sensed temperature.
Claim 5
Dependent Claim
33 words
Apparatus as defined by claim 2, further comprising means for sensing the temperature of the humidified flue gases, and means for controlling the amount of fogging as a function of the sensed temperature.
Claim 6
Dependent Claim
25 words
Apparatus as defined by claim 3, wherein said means for controlling fogging is operative to increase fogging until the sensed temperature reaches a predetermined temperature.
Claim 7
Dependent Claim
25 words
Apparatus as defined by claim 4, wherein said means for controlling fogging is operative to increase fogging until the sensed temperature reaches a predetermined temperature.
Claim 8
Dependent Claim
72 words
A boiler apparatus having reduce noxious emissions, comprising: a boiler having a burner which receives input air and has an exhaust for exhausting flue gases; a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; means for humidifying the recirculated flue gases, said means comprising a fogging device which produces a fog from a fogger water supply and a fogger air supply.
Claim 9
Dependent Claim
72 words
A boiler apparatus having reduce noxious emissions, comprising: a boiler having a burner which receives input air and has an exhaust for exhausting flue gases; a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; means for humidifying the recirculated flue gases, said means comprising a fogging device which produces a fog from a fogger water supply and a fogger air supply.
Claim 10
Dependent Claim
15 words
Apparatus as defined by claim 7, wherein said fogging device comprises an ultrasonic fogging device.
Claim 11
Dependent Claim
33 words
Apparatus as defined by claim 7, further comprising means for sensing the temperature of the humidified flue gases, and means for controlling the amount of fogging as a function of the sensed temperature.
Claim 12
Dependent Claim
33 words
Apparatus as defined by claim 8, further comprising means for sensing the temperature of the humidified flue gases, and means for controlling the amount of fogging as a function of the sensed temperature.
Claim 13
Dependent Claim
25 words
Apparatus as defined by claim 9, wherein said means for controlling fogging is operative to increase fogging until the sensed temperature reaches a predetermined temperature.
Claim 14
Dependent Claim
25 words
Apparatus as defined by claim 10, wherein said means for controlling fogging is operative to increase fogging until the sensed temperature reaches a predetermined temperature.
Claim 15
Dependent Claim
22 words
Apparatus as defined by claim 11, wherein said burner is natural gas fired, and said predetermined temperature is about 200 degrees F.
Claim 16
Dependent Claim
21 words
Apparatus as defined by claim 11, wherein said burner is oil fired, and said predetermined temperature is about 250 degrees F.
Claim 17
Dependent Claim
17 words
Apparatus as defined by claim 7, wherein said fogger water supply includes a NO x reducing chemical.
Claim 18
Dependent Claim
19 words
Apparatus as defined by claim 15, wherein said chemical is selected from the group consisting of urea and ammonia.
Claim 19
Dependent Claim
62 words
For use in an apparatus that contains a burner which receives input air and has an exhaust for exhausting flue gases, and has a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; a method for reducing noxious emissions, comprising humidifying the recirculated flue gases by fogging with an ultrasonic fogging device.
Claim 20
Dependent Claim
62 words
For use in an apparatus that contains a burner which receives input air and has an exhaust for exhausting flue gases, and has a flue gas recirculation system for recirculating a portion of the flue gases back to an input of the burner; a method for reducing noxious emissions, comprising humidifying the recirculated flue gases by fogging with an ultrasonic fogging device.
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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) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |