US3616992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial vacuum centrifugal separator
Assignee: Individual
•
Filing: 1969-06-06
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Granted: 1971-11-02
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Expires: 1989-06-06
Abstract
Abstract A centrifugal separator is provided for removing solid particles entrained in a liquid slurry. A column of liquid is maintained in a rotating open bottom drum by vacuum pressure and the lower end of the drum is received in a shallow basin of a coaxially rotating table. Entrained solid particles are moved by centrifugal action to an annular zone adjacent the wall of the drum where they gravitate and concentrate in a perimetric zone of the shallow basin outside of the drum wall, and are then removed in the form of sludge. Clarified liquid is removed from the top of the central core zone of the liquid in the drum.
Inventors
- 👤 James S Deacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:52
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/02; B04B1/00; B04B15/00; B04B15/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
Apparatus for separating solid particles entrained in a liquid slurry comprising a horizontal table rotatable about a central vertical axis, said table defining a shallow basin having a floor and a perimetric sidewall, a drum mounted coaxially with said table for rotation therewith and having an open lower end located within said basin, said drum and said sidewall forming an annular trough communicating with the interior of said drum, means for supplying said liquid slurry to said drum, means for maintaining a column of liquid in said drum at a level substantially above the liquid level in said annular trough, means for rotating said table and said drum to impart an angular velocity to said slurry whereby solid particles are propelled by centrifugal force to an annular zone adjacent the wall of said drum and thence to said trough to clarify the liquid in the central zone of said drum, means for removing clarified liquid from said drum, and means for removing material containing a high concentration of solid particles from said trough.
Claim 2
Dependent Claim
173 words
Apparatus for separating solid particles entrained in a liquid slurry comprising a horizontal table rotatable about a central vertical axis, said table defining a shallow basin having a floor and a perimetric sidewall, a drum mounted coaxially with said table for rotation therewith and having an open lower end located within said basin, said drum and said sidewall forming an annular trough communicating with the interior of said drum, means for supplying said liquid slurry to said drum, means for maintaining a column of liquid in said drum at a level substantially above the liquid level in said annular trough, means for rotating said table and said drum to impart an angular velocity to said slurry whereby solid particles are propelled by centrifugal force to an annular zone adjacent the wall of said drum and thence to said trough to clarify the liquid in the central zone of said drum, means for removing clarified liquid from said drum, and means for removing material containing a high concentration of solid particles from said trough.
Claim 3
Dependent Claim
22 words
Apparatus as defined in claim 1 wherein the upper portion of said drum has a frustoconical form taperinG inwardly toward the top.
Claim 4
Dependent Claim
30 words
Apparatus as defined in claim 1 wherein said means for supplying said liquid slurry to said drum comprises a stationary pipe extending downwardly coaxial with the axis of said drum.
Claim 5
Dependent Claim
42 words
Apparatus as defined in claim 3 including a conical distributor secured to the lower end of said pipe and adapted to direct the liquid slurry from said pipe downwardly and radially outwardly toward the lower portion of the wall of said drum.
Claim 6
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein the upper end of said drum has a central stationary member and a rotary seal between said member and said drum to provide a hermetic seal.
Claim 7
Dependent Claim
28 words
Apparatus as defined in claim 5 wherein said means for maintaining a column of liquid in said drum comprises a vacuum pump operatively associated with said stationary member.
Claim 8
Dependent Claim
25 words
Apparatus as defined in claim 5 wherein said means for supplying liquid slurry and said means for removing clarified liquid extend through said stationary member.
Claim 9
Dependent Claim
140 words
A process for separating solid particles entrained in a liquid slurry comprising rotating a drum containing said slurry about a vertical axis to impart an angular velocity to the slurry and propel solid particles by centrifugal force to an annular zone adjacent a wall of said drum and thereby clarify the liquid in a central zone of said drum, permitting radial outward movement of said slurry adjacent the base of the drum into a relatively shallow area disposed about said base of the drum, forming a partial vacuum in the drum to maintain the level of the slurry within the drum above the level of the slurry in said shallow area, removing particle-free liquid from an upper portion of said elevated slurry within the drum, and removing liquid containing a high concentration of said particles from the relatively shallow area.
Claim 10
Dependent Claim
140 words
A process for separating solid particles entrained in a liquid slurry comprising rotating a drum containing said slurry about a vertical axis to impart an angular velocity to the slurry and propel solid particles by centrifugal force to an annular zone adjacent a wall of said drum and thereby clarify the liquid in a central zone of said drum, permitting radial outward movement of said slurry adjacent the base of the drum into a relatively shallow area disposed about said base of the drum, forming a partial vacuum in the drum to maintain the level of the slurry within the drum above the level of the slurry in said shallow area, removing particle-free liquid from an upper portion of said elevated slurry within the drum, and removing liquid containing a high concentration of said particles from the relatively shallow area.
Claim 11
Dependent Claim
13 words
The process of claim 8 including continuously supplying liquid slurry to said drum.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |