Patent US4581009A successfully refreshed from Google Patents.
US4581009A
Expired / Lapsed
US
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Centrifuge, particularly solid bowl centrifuge for solids/liquid separation of sludges
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1984-08-14
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Granted: 1986-04-08
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Expires: 2004-08-14
Abstract
Abstract A mechanism and method for treating sludge material for separating the material into solid and liquid phases in a centrifugal separator having a rotating drum and an advancing screw driven at a speed differential relative to the drum, conveying a solid phase of the sludge to a digester tower for generating a biogas, delivering the biogas to a collection chamber and feeding the biogas to a gas powered prime mover connected to drive the centrifugal separator through a hydraulic pump and motor drive with the biogas generated and supplied to the motor commensurate with the speed of operation of the separator.
Inventors
- 👤 Paul Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:58
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/38; C02F1/385; B; B04; B04B; B04B1/00; B04B1/20; B04B1/2016; B04B9/00; B04B9/06; C12; C12M; C12M21/00; C12M21/04; C12M33/00; C12M33/16; C12M47/00; C12M47/02; Y; Y02; Y02E; Y02E50/00; Y02E50/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas comprising in combination: a centrifugal separator having a sludge inlet and outlets for the liquid phase and solid phase resulting from separation; biogas generating means receiving the solids separated out in said separator and arranged to generate biogas therefrom; a drive connected to drive the separator; and a biogas operated motor receiving biogas from said biogas generating means and connected to said drive for direct driving of the separator.
Claim 2
Dependent Claim
89 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas comprising in combination: a centrifugal separator having a sludge inlet and outlets for the liquid phase and solid phase resulting from separation; biogas generating means receiving the solids separated out in said separator and arranged to generate biogas therefrom; a drive connected to drive the separator; and a biogas operated motor receiving biogas from said biogas generating means and connected to said drive for direct driving of the separator.
Claim 3
Dependent Claim
51 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 1: wherein said drive includes a hydraulic pump driven by the motor and a hydraulic motor drivingly connected to the separator and driven by the pump.
Claim 4
Dependent Claim
83 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 1: wherein said separator includes a centrifuge drum and a conveyor screw rotatable at a differential speed relative to the drum; said drive being connected to drive the drum; a second drive drivingly connected to drive the screw at a differential speed relative to the drum; and a second biogas operated motor connected to said second drive directly.
Claim 5
Dependent Claim
37 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 1: including an electric generator connected to be driven by said motor.
Claim 6
Dependent Claim
84 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas comprising in combination: a first centrifugal separator having a sludge inlet and outlets for the liquid phase and solid phase; a first drive connected to drive the separator; and a digester sludge tower receiving the solids from said separator and generating biogas therefrom, a biogas operated first motor receiving biogas from said tower and connected directly to said drive for operation of the separator.
Claim 7
Dependent Claim
84 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas comprising in combination: a first centrifugal separator having a sludge inlet and outlets for the liquid phase and solid phase; a first drive connected to drive the separator; and a digester sludge tower receiving the solids from said separator and generating biogas therefrom, a biogas operated first motor receiving biogas from said tower and connected directly to said drive for operation of the separator.
Claim 8
Dependent Claim
87 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 5: including a second centrifugal separator having a sludge inlet connected to said sludge tower; a second drive connected to drive the second separator; a second biogas operated motor connected to said drive for operation of the second separator; and second conduit means leading from the tower to said second motor to supply the fuel for operating said second biogas operated motor.
Claim 9
Dependent Claim
43 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 6: including a gas collecting chamber in said first and second conduit means receiving biogas from the tower.
Claim 10
Dependent Claim
40 words
A centrifuge system for treating and separating the solids and liquid phases of sludge of the type which generates biogas constructed in accordance with claim 6: including first and second electrical generators respectively driven by said first and second motors.
Claim 11
Independent Claim
90 words
The method of treating sludge material for separating the material into solids and liquid phases comprising the steps of: feeding sludge to a centrifugal separator; conveying a solid phase from the separator to a digester and generating a biogas; supplying the biogas to an intermediate collection chamber; delivering biogas from said collection chamber to drive a gas powered prime mover; driving the centrifugal separator with said gas powered prime mover; and feeding biogas from said collection chamber to said prime mover at a rate commensurate with the production of biogas.
Claim 12
Independent Claim
90 words
The method of treating sludge material for separating the material into solids and liquid phases comprising the steps of: feeding sludge to a centrifugal separator; conveying a solid phase from the separator to a digester and generating a biogas; supplying the biogas to an intermediate collection chamber; delivering biogas from said collection chamber to drive a gas powered prime mover; driving the centrifugal separator with said gas powered prime mover; and feeding biogas from said collection chamber to said prime mover at a rate commensurate with the production of biogas.
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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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |