US3664094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow balancing restriction in gas scrubber
Assignee: AMERICAN DAVIDSON Inc A CORP OF MICH
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Filing: 1970-07-27
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Granted: 1972-05-23
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Expires: 1990-07-27
Abstract
Abstract A wet dust collector or scrubber having an inertial separator section for removing a substantial percentage of the dust particles from the treated gas stream, a porous packing subjected to flushing liquid for producing a concentrated fog and assimilating the remaining dust particles into said fog, and a second separator section for removing the wet dust particles from the gas stream. The first inertial section preferably includes a special flow-limiting nozzle which exerts a balancing pressure drop on the flow of separated dust particles so that proper particle separator flows are achieved in the first inertial section.
Inventors
- 👤 William E Barkovitz
- 👤 Julius V Przygocki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:12
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
In a dust collector comprising means for wetting the treated gas stream; a first inertial separator means for removing wetted dust particles from the treated stream; a porous packing arranged to intercept the partially cleaned stream; means for applying flushing liquid to the packing, whereby thE flushing liquid is intermixed with the flowing stream; and a second separator means arranged to remove liquid-coated particles from the stream flowing out the packing: the improvement comprising a discharge tube for conveying concentrated dust from the inertial separator means to a location downstream of said packing; and a restriction in the discharge tube for exerting a resistance to flow through the tube in proportion to the flow resistance of the aforementioned packing.
Claim 2
Dependent Claim
119 words
In a dust collector comprising means for wetting the treated gas stream; a first inertial separator means for removing wetted dust particles from the treated stream; a porous packing arranged to intercept the partially cleaned stream; means for applying flushing liquid to the packing, whereby thE flushing liquid is intermixed with the flowing stream; and a second separator means arranged to remove liquid-coated particles from the stream flowing out the packing: the improvement comprising a discharge tube for conveying concentrated dust from the inertial separator means to a location downstream of said packing; and a restriction in the discharge tube for exerting a resistance to flow through the tube in proportion to the flow resistance of the aforementioned packing.
Claim 3
Dependent Claim
17 words
The collector of claim 1 wherein the restriction is located at the exit end of the tube.
Claim 4
Dependent Claim
28 words
The collector of claim 1 wherein the restriction consists of a flow nozzle having a gradually tapering inlet throat for efficient conversion of static pressure to velocity pressure.
Claim 5
Dependent Claim
71 words
The collector of claim 1 wherein the discharge tube takes the form of a vertical tube arranged for downflow discharge of wetted dust concentrate; said collector including a hopper having sloping surfaces leading to a drainage pipe; the exit end of said discharge tube being spaced above the hopper surfaces so that gas in the concentrated stream can separate out as the stream moves from the tube toward the hopper surfaces.
Claim 6
Dependent Claim
27 words
The collector of claim 4 wherein the discharge tube is in direct vertical alignment with the drainage pipe for direct spray of the concentrate into the pipe.
Claim 7
Dependent Claim
36 words
The collector of claim 4 wherein the exit end of the discharge tube is sufficiently close to the hopper surfaces that the dust concentrated stream has an appreciable velocity as it impacts against the hopper surfaces.
Claim 8
Dependent Claim
73 words
The collector of claim 1 wherein the first inertial separator means comprises a series of vertically spaced concentric cones arranged to confront the dusty gas in downflow relationship: the aforementioned discharge tube taking the form of a vertical tube depending from the lowermost cone; the tube restriction consisting of a nozzle arranged at the lower end of the tube for ejecting a high velocity stream of wetted dust concentrate downwardly from the tube.
Claim 9
Dependent Claim
142 words
The collector of claim 1 wherein the collector comprises an upright tubular casing having a top inlet for the gas stream to be treated; the first inertial separator means comprising a series of vertically spaced upright concentric cones arranged below the inlet to intercept the downflowing inlet stream; the aforementioned discharge tube being a vertical tube depending from the lowermost cone, and the aforementioned packing being disposed in the annular space between the tube and casing: the improvement further comprising a hopper-like casing bottom oriented for gravity discharge of liquid into a connected drainage pipe; said drainage pipe being in general axial alignment with the aforementioned discharge tube for directly receiving the tube flow; the aforementioned restriction comprising a nozzle carried at the lower end of the tube for directing a high velocity stream of wetted dust concentrate downwardly into the pipe.
Claim 10
Dependent Claim
62 words
The collector of claim 1 wherein the tube restriction comprises a flow nozzle arranged on the exit end of the tube to give the stream of wetted dust concentrate a relatively high velocity and venturi scrubbing action as it leaves the tube; said nozzle having a detachable connection with the tube to permit employment of different size nozzles with a given tube.
References Cited (Backward Citations)
US3550356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |