US3714764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler flue gas scrubber
Assignee: Aqua Chem Inc
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Filing: 1970-08-14
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Granted: 1973-02-06
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Expires: 1990-08-14
Abstract
Abstract Pollution control method and apparatus wherein discharge gas containing pollutants is caused to flow between a revolving helical auger-like member and a simultaneously revolving surrounding drum having a film of pollutant absorbing liquid disposed on its surface and caused to flow counter to the gas and into and out of a sump by means of pump vanes carried by the drum.
Inventors
- 👤 F Gething
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:50
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; B01D45/00; B01D45/12; B01D45/14; B01D47/02; B01D47/027; Y; Y10; Y10S; Y10S261/00; Y10S261/09
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
171 words
An apparatus for removing pollutants from a gas stream, the combination of rotatable drum means having an inner peripheral surface defining a treating zone and having a gas inlet connected to receive said gas stream and a gas outlet for discharging the same, helical means rotatably mounted within said treating zone and between said inlet and said outlet and about an axis generally parallel to the flow of said gas stream in said treating zone, means for rotating said drum means and said helical means, said helical means occupying a substantial area of said treating zone to impede the flow of gas therethrough, the rotation of said helical means inducing the flow of said gas stream outwardly toward said peripheral surface and in a helical path through said treating zone to centrifically move particulate material entrained in said gas stream to said peripheral surface, and second means for introducing a particle entrapping liquid on said first peripheral surface wherebY rotation of said drum centrifically distributes said liquid around said peripheral surface.
Claim 2
Independent Claim
171 words
An apparatus for removing pollutants from a gas stream, the combination of rotatable drum means having an inner peripheral surface defining a treating zone and having a gas inlet connected to receive said gas stream and a gas outlet for discharging the same, helical means rotatably mounted within said treating zone and between said inlet and said outlet and about an axis generally parallel to the flow of said gas stream in said treating zone, means for rotating said drum means and said helical means, said helical means occupying a substantial area of said treating zone to impede the flow of gas therethrough, the rotation of said helical means inducing the flow of said gas stream outwardly toward said peripheral surface and in a helical path through said treating zone to centrifically move particulate material entrained in said gas stream to said peripheral surface, and second means for introducing a particle entrapping liquid on said first peripheral surface wherebY rotation of said drum centrifically distributes said liquid around said peripheral surface.
Claim 3
Dependent Claim
47 words
The apparatus set forth in claim 1 wherein said second means is operative to flow said liquid along said peripheral surface and from the outlet end of said treating zone to the inlet end thereof and in a direction generally counter to that of said gas stream.
Claim 4
Dependent Claim
23 words
The apparatus set forth in claim 1 wherein said helical means includes a helical portion which advances in the direction of gas flow.
Claim 5
Dependent Claim
34 words
The apparatus set forth in claim 1 wherein said drum means comprises a tubular member mounted for rotation on an axis generally parallel to the direction of gas flow and surrounding said helical means.
Claim 6
Dependent Claim
22 words
The apparatus set forth in claim 1 and including means for injecting liquid onto said peripheral surface adjacent the outlet end thereof.
Claim 7
Dependent Claim
32 words
The apparatus set forth in claim 3, and including third means external of said treating zone for aiding the flow of gas through said zone and between said inlet and said outlet.
Claim 8
Dependent Claim
51 words
The apparatus set forth in claim 3, wherein said drum means comprises a tubular member mounted for rotation on an axis generally parallel to the direction of gas flow and surrounding said helical means, said second means including injecting means for injecting liquid onto the inner surface of said tubular member.
Claim 9
Dependent Claim
58 words
The apparatus set forth in claim 7 wherein said injecting means is operative to inject liquid onto said tubular member at the outlet end of said zone so that said liquid forms a thin film on said rotating tubular member and traverses said zone in a direction counter to that of said gas as said tubular member rotates.
Claim 10
Dependent Claim
71 words
The apparatus set forth in claim 1, wherein said helical means comprises a helical member having a plurality of volutions which extend generally in the direction of gas flow and said drum means comprises a cylindrical member surrounding said helical member in a generally coaxial relation and having an inside diameter larger than the outside diaMeter of said helical member, said cylindrical and helical members being rotatable around their common axis.
Claim 11
Dependent Claim
43 words
The apparatus set forth in claim 9 and including shaft means extending through said treating zone, said cylindrical and helical members being mounted on said shaft means and means for selectively rotating said shaft means to rotate said first and second members therewith.
Claim 12
Dependent Claim
29 words
The apparatus set forth in claim 10, and including a liquid supply and means for injecting liquid onto the inner surface of said cylindrical member as the latter rotates.
Claim 13
Independent Claim
201 words
An apparatus for removing pollutants from a gas stream, the combination of a cylindrical member having an inner peripheral surface defining a treating zone and having a gas inlet connected to receive said gas stream and a gas outlet for discharging the same, a helical member rotatably mounted within said treating zone and between said inlet and said outlet and about an axis generally parallel to the flow of said gas stream in said treating zone, said helical member having a plurality of volutions which extend generally in the direction of gas flow, said cylindrical member surrounding said helical member in a generally coaxial relation and having an inside diameter larger than the outside diameter of said helical member, shaft means extending in a generally horizontal direction through said treating zone, said cylindrical and helical members being mounted on said shaft means, means for selectively rotating said shaft means to rotate said first and second members therewith, tank means disposed below said shaft means, a quantity of liquid disposed in said tank means to the level of said cylindrical member, and projecting means mounted on said cylindrical member for injecting fluid into the inner surface thereof as said cylindrical member rotates.
Claim 14
Independent Claim
201 words
An apparatus for removing pollutants from a gas stream, the combination of a cylindrical member having an inner peripheral surface defining a treating zone and having a gas inlet connected to receive said gas stream and a gas outlet for discharging the same, a helical member rotatably mounted within said treating zone and between said inlet and said outlet and about an axis generally parallel to the flow of said gas stream in said treating zone, said helical member having a plurality of volutions which extend generally in the direction of gas flow, said cylindrical member surrounding said helical member in a generally coaxial relation and having an inside diameter larger than the outside diameter of said helical member, shaft means extending in a generally horizontal direction through said treating zone, said cylindrical and helical members being mounted on said shaft means, means for selectively rotating said shaft means to rotate said first and second members therewith, tank means disposed below said shaft means, a quantity of liquid disposed in said tank means to the level of said cylindrical member, and projecting means mounted on said cylindrical member for injecting fluid into the inner surface thereof as said cylindrical member rotates.
Claim 15
Dependent Claim
49 words
The apparatus set forth in claim 12, wherein said projecting means is disposed on the gas outlet end of said cylindrical member to force said liquid to flow in a direction counter to that of said gas and to discharge from the gas inlet end of said treating zone.
Claim 16
Dependent Claim
19 words
The apparatus set forth in claim 13, and including means for controlling the level of liquid in said tank.
Claim 17
Dependent Claim
34 words
The apparatus set forth in claim 14, and including a demester means disposed at the outlet end of said treating zone for removing vapor from said treated gas prior to discharge into the atmosphere.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |