EP0348213A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An improved solids-liquids separator
Assignee: Richard Mozley Ltd
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Filing: 1989-06-23
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Granted: —
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Expires: 2009-06-23
Abstract
Abstract A centrifugal solids-liquids separator comprises a rotatable hollow centrifuge drum (12) at least a part of which is tapered, and which is rotatable about its axis, means (33, 34, 35) for introducing a slurry of solids and liquids to be separated at a point along the length of the drum (12) spaced from a wider end (14) so that rotation of the drum (12) tends to cause migration of the slurry towards the said wider end (14), and scraper conveyor means (24) rotatable about an axis coincident with that of the drum (12) and at a relative speed which is low in relation to the absolute speed of the drum, the scraper conveyor means (24) being so mounted that they act in direct contact with the inside surface (18) of the drum (12) so as to displace solids contacted thereby towards the narrow end (13) of the drum (12) against the axial force induced by the rotation.
Inventors
- 👤 Richard Henry Mozley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 15:01
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/08; B04B1/00; B04B1/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A centrifugal solids-liquids separator comprising a rotatable hollow centrifuge drum (12) at least a part of which is tapered, means for rotating the drum (12) about its axis, and means (33, 34, 35) for introducing a slurry of the solids and liquid(s) to be separated at a point along the length of the drum (12) spaced from the wider end (14) thereof such that rotation of the drum (12) tends to cause migration of the slurry towards the said wider end (14) thereof, and scraper conveyor means (24) rotatable about an axis coincident with that of the drum (12) and at a relative speed which is low in relation to the absolute speed of the drum, characterised in that the scraper conveyor means (24, 27, 28, 29) are so mounted that they act in direct contact with the inside surface (18) of the drum (12) to displace solids particles contacted thereby towards the narrow end (13) of the drum (12) against the axial force induced by rotation.
Claim 2
Dependent Claim
167 words
A centrifugal solids-liquids separator comprising a rotatable hollow centrifuge drum (12) at least a part of which is tapered, means for rotating the drum (12) about its axis, and means (33, 34, 35) for introducing a slurry of the solids and liquid(s) to be separated at a point along the length of the drum (12) spaced from the wider end (14) thereof such that rotation of the drum (12) tends to cause migration of the slurry towards the said wider end (14) thereof, and scraper conveyor means (24) rotatable about an axis coincident with that of the drum (12) and at a relative speed which is low in relation to the absolute speed of the drum, characterised in that the scraper conveyor means (24, 27, 28, 29) are so mounted that they act in direct contact with the inside surface (18) of the drum (12) to displace solids particles contacted thereby towards the narrow end (13) of the drum (12) against the axial force induced by rotation.
Claim 3
Dependent Claim
67 words
A centrifugal solids-liquids separator according to Claim 1, characterised in that the scraper conveyor means (24, 27, 28, 29) comprise a plurality of individual scraper blades (27, 28) mounted so as to be individually radially displaceable with respect to the inner surface (18) of the drum (12) such that they are held in direct contact therewith by the centrifugal forces exerted upon rotation of the drum/conveyor combination.
Claim 4
Dependent Claim
59 words
A centrifugal solids-liquids separator according to Claim 1 or Claim 2, characterised in that the scraper blades (27, 28) are rockable about an axis generally perpendicular to a radial plane including the axis of rotation of the said scraper conveyor means and passing through the point of connection of the blade (27, 28) to a blade carrier member (24).
Claim 5
Dependent Claim
28 words
A centrifugal solids-liquids separator according to any preceding Claim, characterised in that the scraper blades (28) carry additional weights for increasing the radial force exerted thereby during rotation.
Claim 6
Dependent Claim
35 words
A centrifugal solids-liquids separator according to any preceding Claim, characterised in that the scraper blades (27, 28) comprise a rigid blade body (27) and a resiliently flexible blade member (28) having a drum-contacting surface (29).
Claim 7
Dependent Claim
65 words
A centrifugal solids-liquids separator according to any preceding claim, characterised in that the said tapered part of the rotatable drum (12) has a shallow cone angle, less than 2° and the wide end (14) of the drum (16) has effectively no weir lip such that slurry introduced into the drum (12) whilst rotating is formed into a thin film by the centrigual forces acting thereon.
Claim 8
Dependent Claim
20 words
A centrifugal solids-liquids separator according to any preceding Claim, characterised in that the drum has a lining of wear-resistant material.
Claim 9
Dependent Claim
20 words
A centrifugal solids-liquids separator according to Claim 7 characterised in that the drum lining (18) has a smooth inner surface.
Claim 10
Dependent Claim
37 words
A centrifugal solids-liquids separator according to Claim 7 or Claim 8, characterised in that the drum lining (18) is cast in-situ by rotating the drum (12) whilst holding its axis at a shallow angle to the horizontal.
Claim 11
Dependent Claim
39 words
A centrifugal solids-liquids separator according to Claim 13, characterised in that there is a radial slurry delivery duct (33) acting to cause circumferential acceleration of slurry as it is introduced to the inside surface (18) of the drum (12).
References Cited (Backward Citations)
No citation records indexed.
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