US5339755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry scrubber with condensing heat exchanger for cycle efficiency improvement
Assignee: Babcock and Wilcox Power Generation Group Inc
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Filing: 1993-08-10
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Granted: 1994-08-23
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Expires: 2013-08-10
Abstract
Abstract A system for controlling sulfur dioxide (SO 2 ) in a flue gas produced by a boiler comprises an air heater connected to the boiler for cooling the flue gas produced by the boiler. A dry scrubber is connected to the air heater and a slurry source for receiving the heated flue gas and a slurry in order to remove SO 2 from the flue gas. A particulate collector is connected to the dry scrubber in order to collect particles from the flue gas. Heat is recovered from the flue gas by connecting a condensing heat exchanger to the particulate collector; and a condensate recycler is connected to the condensing heat exchanger and the slurry source for reducing the water requirements for the system.
Inventors
- 👤 J. William Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:26
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/006; F23J15/02; F23J15/022; F23J15/025; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; F23J15/04; F23J15/06; F23L; F23L15/00; F23L15/04; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F23J2215/00; F23J2215/20; F23J2217/00; F23J2217/10; F23J2217/101; F23J2219/00; F23J2219/60; F23J2219/70; Y; Y02; Y02E; Y02E20/00; Y02E20/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A system for controlling sulfur dioxide (SO 2 ) in a flue gas produced by a boiler, the system comprising: an air heater connected to the boiler for cooling the flue gas produced by the boiler; a slurry source; a dry scrubber connected to the air heater and the slurry source for receiving the heated flue gas and a slurry from the slurry source for removing SO 2 from the flue gas; particulate collection means connected to the dry scrubber for collecting particles from the flue gas; a condensing heat exchanger connected to the particulate collection means for recovering heat from the flue gas; and condensate recycle means connected to the condensing heat exchanger and the slurry source.
Claim 2
Independent Claim
118 words
A system for controlling sulfur dioxide (SO 2 ) in a flue gas produced by a boiler, the system comprising: an air heater connected to the boiler for cooling the flue gas produced by the boiler; a slurry source; a dry scrubber connected to the air heater and the slurry source for receiving the heated flue gas and a slurry from the slurry source for removing SO 2 from the flue gas; particulate collection means connected to the dry scrubber for collecting particles from the flue gas; a condensing heat exchanger connected to the particulate collection means for recovering heat from the flue gas; and condensate recycle means connected to the condensing heat exchanger and the slurry source.
Claim 3
Dependent Claim
23 words
The system according to claim 1, including a stack connected to the condensing heat exchanger for passing the flue gas from the system.
Claim 4
Dependent Claim
15 words
The system according to claim 1, wherein the condensing heat exchanger is cooled by air.
Claim 5
Dependent Claim
15 words
The system according to claim 1, wherein the condensing heat exchanger is cooled by water.
Claim 6
Dependent Claim
28 words
The system according to claim 3, including means for channeling air from the condensing heat exchanger connected to the air heater for introducing heated air into the boiler.
Claim 7
Dependent Claim
14 words
The system according to claim 5, wherein the particulate collection means comprises a baghouse.
Claim 8
Dependent Claim
20 words
The system according to claim 3, wherein a fan is connected to the condensing heat exchanger for heating the air.
Claim 9
Dependent Claim
15 words
The system according to claim 4, wherein a fan is connected to the air heater.
Claim 10
Dependent Claim
14 words
The system according to claim 4, wherein the particulate collection means comprises a baghouse.
Claim 11
Independent Claim
77 words
A method for removing sulfur dioxide (SO 2 ) from a flue gas produced by a boiler, the method comprising: cooling the flue gas produced by the boiler; providing a slurry source to a dry scrubber; removing SO 2 from the flue gas in the dry scrubber; collecting particulate from the flue gas; recovering heat from the flue gas in a condensing heat exchanger; and recycling condensate produced by the condensing heat exchanger back into the system.
Claim 12
Independent Claim
77 words
A method for removing sulfur dioxide (SO 2 ) from a flue gas produced by a boiler, the method comprising: cooling the flue gas produced by the boiler; providing a slurry source to a dry scrubber; removing SO 2 from the flue gas in the dry scrubber; collecting particulate from the flue gas; recovering heat from the flue gas in a condensing heat exchanger; and recycling condensate produced by the condensing heat exchanger back into the system.
Claim 13
Dependent Claim
15 words
The method according to claim 10, wherein the condensing heat exchanger is cooled by air.
Claim 14
Dependent Claim
15 words
The method according to claim 10, wherein the condensing heat exchanger is cooled by water.
Claim 15
Dependent Claim
18 words
The method according to claim 11, including channeling air from the condensing heat exchanger back into the boiler.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |