US3675397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing entrained dust particles from a gaseous stream
Assignee: Individual
•
Filing: 1970-12-09
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Granted: 1972-07-11
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Expires: 1990-12-09
Abstract
Abstract An apparatus for removing entrained solid particles from a gaseous stream using a wet-type dust collection system embodying the venturi principle. Water droplets are introduced into the particle laden gaseous stream upstream of the venturi throat by means of rotating drums having a lower surface portion immersed in a water trough. The rotating drums pick up water on their surfaces and propel small droplets tangentially outward in the form of a spray. The venturi throat is defined in part by a pair of rollers journaled for free rotation and having parallel axes spaced so that adjacent surfaces of the rollers define between them a restriction. The force of surface friction between the roller surfaces and the moving stream causes free rotation of the rollers thus reducing frictional resistance to stream flow and distributing erosion over a relatively large area.
Inventors
- 👤 James S Deacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:09
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
Apparatus for removing solid particles from particle laden gases in a gaseous stream, comprising: a scrubber assembly interposed in said gaseous stream and having an inlet and an outlet for said stream, walls defining a passage for said stream, said passage having a converging upstream portion and a diverging downstream portion, said walls including a pair of opposed converging walls in said upstream portion and a pair of opposed diverging walls in said downstream portion, each converging wall and its corresponding diverging wall being spaced apart endwise from one another, means for producing a liquid spray adjacent said inlet whereby liquid droplets Are mixed into and carried by said stream, and a pair of rollers with spaced parallel axes journaled in said unit and located with opposed cylindrical portions of the surfaces thereof positioned in opposite sides of said stream extending through the space between the respective converging and diverging walls of said passage to define a venturi throat with curved side walls that translate in the direction of said stream to reduce friction, and means for removing said water droplets and agglomerated solid particles from said stream.
Claim 2
Dependent Claim
188 words
Apparatus for removing solid particles from particle laden gases in a gaseous stream, comprising: a scrubber assembly interposed in said gaseous stream and having an inlet and an outlet for said stream, walls defining a passage for said stream, said passage having a converging upstream portion and a diverging downstream portion, said walls including a pair of opposed converging walls in said upstream portion and a pair of opposed diverging walls in said downstream portion, each converging wall and its corresponding diverging wall being spaced apart endwise from one another, means for producing a liquid spray adjacent said inlet whereby liquid droplets Are mixed into and carried by said stream, and a pair of rollers with spaced parallel axes journaled in said unit and located with opposed cylindrical portions of the surfaces thereof positioned in opposite sides of said stream extending through the space between the respective converging and diverging walls of said passage to define a venturi throat with curved side walls that translate in the direction of said stream to reduce friction, and means for removing said water droplets and agglomerated solid particles from said stream.
Claim 3
Dependent Claim
87 words
Apparatus as defined in claim 1 including at least one spray drum and a trough of water upstream of said venturi throat, said drum having a bottom surface portion thereof immersed in water in said trough, means for maintaining a generally uniform water level in said trough and means for rotating said drum about its axis with sufficient surface velocity whereby water that clings to the surface of said drum is propelled tangentially in the form of a spray of droplets into the path of said stream.
Claim 4
Dependent Claim
27 words
Apparatus as defined in claim 2 including two of said spray drums, each having a water trough, said drums being located on opposite sides of said stream.
Claim 5
Dependent Claim
24 words
Apparatus as defined in claim 1 including means for adjusting the spacing between said rollers whereby to change the size of said venturi throat.
Claim 6
Dependent Claim
85 words
Apparatus as defined in claim 4 wherein said rollers are journaled on axels and including a pair of eccentric stub shafts located at the ends of each axle, each pair of stub shafts being coaxial and said axles being supported in said scrubber assembly by bearings in which said stub shafts are pivotally supported, and means for turning and locating said pairs of stub shafts at different angular positions about their respective axes whereby to change the location of said axles relative to one another.
Claim 7
Dependent Claim
31 words
Apparatus as defined in claim 5 wherein said means for turning said stub shafts about their respective axes comprises a lever connected to one of the stub shafts of each pair.
References Cited (Backward Citations)
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |