US4439320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids concentrator
Assignee: Individual
•
Filing: 1981-06-29
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Granted: 1984-03-27
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Expires: 2001-06-29
Abstract
Abstract Apparatus for concentrating solids from a solids/liquid mixture, particularly sludge from a waste stream/flocculating polymer mixture, includes a frusto-conically shaped drum. A solids/liquid mixture is introduced through a conduit into a large end of the rotary driven conical drum. A maximum amount of the free liquid in the mixture is released from the drum through its screen side wall near the large entrance end of the drum. The solids in the drum, after initial release of the liquid therefrom, are moved during their travel to the smaller exit end of the drum where the surface movement of the drum is slower. The resulting thickened or dewatered solids are removed from the smaller end of the drum as a formed cake or in the form of thickened sludge.
Inventors
- 👤 Arie Blok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:08
CPC Classifications
B; B01; B01F; B01F29/00; B01F29/60; B01F29/63; B01D; B01D33/00; B01D33/06; B01D33/11; B01D33/35; B01D33/41; B01D33/44; B01D33/48; B01D33/50; B01D33/70; B01D33/72; B01D33/722; B01D37/00; B01D37/03; B01F29/25; B01F29/40; B01F29/401; B01F29/4011; B01F29/40113; B01F29/403; B01F29/4033; B01D2201/00; B01D2201/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
360 words
A solids concentrator comprising a frusto-conical drum including a foraminous side wall screen and having a large inlet end and a smaller open outlet end, said frusto-conical drum including a series of spaced elongated frame members extending lengthwise of said drum externally of said side wall screen, said side wall screen being comprised of a series of separate screen portions, and means for fastening each of said screen portions between respective pairs of said series of spaced elongated frame members, each of said frame members including a bar portion lying in a radial plane, and said screen portions each having a free edge portion clamped to a radially extending face of a respective bar portion, said screen having a straight line taper from said large inlet end to said smaller open outlet end, means for introducing a mixture of solids and liquid into said inlet end, means for rotating said drum, and conveying means disposed within said drum for conveying the solids toward said open outlet end thereof as the liquid escapes through said screen, said conveying means comprising a spiral vane fixedly disposed within said drum along and closely adjacent an inner periphery of said foraminous side wall for constantly urging liquid through said side wall, said spiral vane being in the form of a helix having a large diameter end adjacent said inlet end and a small diameter end adjacent said outlet end, said spiral vane having a constant taper corresponding to that of said side wall screen and a decreasing pitch and diameter as said vane extends from said large inlet end toward said smaller outlet end, said solids concentrator further including spraying means for spraying a cleansing liquid along a top portion of said side wall screen for constantly cleansing said side wall screen, and a pan contained within said screen for receiving the cleansing liquid and foreign matter carried thereby and discharging said cleansing liquid and foreign matter separately from said drum, a sump disposed beneath said drum for collecting liquid draining through said side wall screen, and means for drawing liquid from said sump and for supplying it under pressure to said spraying means.
Claim 2
Dependent Claim
360 words
A solids concentrator comprising a frusto-conical drum including a foraminous side wall screen and having a large inlet end and a smaller open outlet end, said frusto-conical drum including a series of spaced elongated frame members extending lengthwise of said drum externally of said side wall screen, said side wall screen being comprised of a series of separate screen portions, and means for fastening each of said screen portions between respective pairs of said series of spaced elongated frame members, each of said frame members including a bar portion lying in a radial plane, and said screen portions each having a free edge portion clamped to a radially extending face of a respective bar portion, said screen having a straight line taper from said large inlet end to said smaller open outlet end, means for introducing a mixture of solids and liquid into said inlet end, means for rotating said drum, and conveying means disposed within said drum for conveying the solids toward said open outlet end thereof as the liquid escapes through said screen, said conveying means comprising a spiral vane fixedly disposed within said drum along and closely adjacent an inner periphery of said foraminous side wall for constantly urging liquid through said side wall, said spiral vane being in the form of a helix having a large diameter end adjacent said inlet end and a small diameter end adjacent said outlet end, said spiral vane having a constant taper corresponding to that of said side wall screen and a decreasing pitch and diameter as said vane extends from said large inlet end toward said smaller outlet end, said solids concentrator further including spraying means for spraying a cleansing liquid along a top portion of said side wall screen for constantly cleansing said side wall screen, and a pan contained within said screen for receiving the cleansing liquid and foreign matter carried thereby and discharging said cleansing liquid and foreign matter separately from said drum, a sump disposed beneath said drum for collecting liquid draining through said side wall screen, and means for drawing liquid from said sump and for supplying it under pressure to said spraying means.
Claim 3
Dependent Claim
40 words
A solids concentrator as defined in claim 1 including means for supporting said side wall screen for rotation with the lowermost part of said side wall screen being at a downward incline from its inlet end to its outlet end.
Claim 4
Dependent Claim
91 words
A solids concentrator as defined in claim 1 including a hollow feed member frusto-conical in shape and having a large end thereof connected to said large inlet end of said drum and a small inlet opening, the shape of said hollow feed member providing for gentle introduction of said mixture of solids and liquid into said drum, and said means for rotating said drum including drive means connected to said hollow feed member adjacent said small end of said hollow feed member for rotating said hollow feed member and said drum.
Claim 5
Dependent Claim
64 words
A solids concentrator as defined in claim 1 including a support frame, means mounting said drum on said support frame, pivot means adjacent one end portion of said support frame, and lift means adjacent another portion of said support frame for pivoting said support frame about said pivot means to vary the elevation of said drum inlet end relative to said drum outlet end.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |