CA1102604A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Method and an apparatus for treating fibre suspensions
Assignee: Metso Fiber Karlstad AB
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Filing: 1979-05-31
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Granted: 1981-06-09
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Expires: 1999-05-31
Abstract
Abstract ABSTRACT A fibre suspension of high consistency is caused to flow (Figs. 5 & 6) through a fiberizing zone (36) the opposite surfaces (34, 48) of which are provided with protrusions (49) or recesses which move in relation to the protrusions (42) or recesses of the opposite surface. Material or energy is added to or extracted from the fibre suspension while it is in a fluidized state. The method is applicable e.g. to screening, washing and dewatering of a fibre suspension or mixing chemicals to a fibre suspension.
Inventors
- 👤 Johan E. Gullichsen
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-09 12:51
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/70; B01D29/72; B01D29/11; B01D29/114; B01D29/115; B01D33/00; B01D33/06; B01D33/073; B01F; B01F23/00; B01F23/50; B01F23/53; B01F27/00; B01F27/27; B01F27/272; B01F27/2722; B01F27/2723; B01J; B01J4/00; B01J4/001; B04; B04C; B04C9/00; D; D21; D21D; D21D5/00; D21D5/02; D21D5/023; D21D5/026; D21D5/18; D21D5/22; D21D5/26; D21F; D21F1/00; D21F1/0018; D21F1/66; B01D2201/00; B01D2201/28; B01D2201/287; B01F25/00; B01F2025/91; B01F2025/911; B01F27/80; B04C2009/004; B04C2009/007
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A method for treating a fibre suspension having a consistency within the range of 5% to 25% which comprises the steps of positioning a rotor, having an outer surface with a plurality of projecting portions, within a hollow casing, having an inner surface with a plurality of projecting portions, to establish a fluidizing zone between the outer surface of the rotor and the inner surface of the casing, introducing a fibre suspension of a consistency within the range of 5% to 25% into said fluidizing zone, rotatably driving said rotor to establish thereby and in cooperation with said casing inner surface, shear forces and changes in flow direction acting upon the fibre suspension to fluidize same by breaking up interlocked fibre flocs present in the suspension in said fluidization zone, the projecting portions of said rotor and hollow casing establishing in said fluidizing zone flow components which alternate in direction and deviate from the main flow direction, and withdrawing the fluidized suspension from said fluidization zone.
Claim 2
Independent Claim
166 words
A method for treating a fibre suspension having a consistency within the range of 5% to 25% which comprises the steps of positioning a rotor, having an outer surface with a plurality of projecting portions, within a hollow casing, having an inner surface with a plurality of projecting portions, to establish a fluidizing zone between the outer surface of the rotor and the inner surface of the casing, introducing a fibre suspension of a consistency within the range of 5% to 25% into said fluidizing zone, rotatably driving said rotor to establish thereby and in cooperation with said casing inner surface, shear forces and changes in flow direction acting upon the fibre suspension to fluidize same by breaking up interlocked fibre flocs present in the suspension in said fluidization zone, the projecting portions of said rotor and hollow casing establishing in said fluidizing zone flow components which alternate in direction and deviate from the main flow direction, and withdrawing the fluidized suspension from said fluidization zone.
Claim 3
Independent Claim
157 words
An apparatus for treating a fibre suspension which comprises a hollow casing having an inner surface with a plurality of projecting portions; a rotor having an outer surface with a plurality of projecting portions and disposed in said casing for rotation relative thereto, the outer surface of said rotor being spaced-apart from the inner sur-face of said casing and cooperating therewith to establish a fluidizing zone extending between the outer surface of the rotor and said inner surface of the casing, said projecting portions of the rotor and casing acting upon a fibre suspension in said fluidizing zone when the rotor is rotatably driven to apply to the suspension shear forces and changes in flow direction to fluidize the suspension by breaking up interlocked fibre flocs present therein; inlet means for introducing a fibre suspension into said fluidization zone of the casing; and outlet means for withdrawing fluidized fibre suspension from said fluidization zone of the casing.
Claim 4
Independent Claim
157 words
An apparatus for treating a fibre suspension which comprises a hollow casing having an inner surface with a plurality of projecting portions; a rotor having an outer surface with a plurality of projecting portions and disposed in said casing for rotation relative thereto, the outer surface of said rotor being spaced-apart from the inner sur-face of said casing and cooperating therewith to establish a fluidizing zone extending between the outer surface of the rotor and said inner surface of the casing, said projecting portions of the rotor and casing acting upon a fibre suspension in said fluidizing zone when the rotor is rotatably driven to apply to the suspension shear forces and changes in flow direction to fluidize the suspension by breaking up interlocked fibre flocs present therein; inlet means for introducing a fibre suspension into said fluidization zone of the casing; and outlet means for withdrawing fluidized fibre suspension from said fluidization zone of the casing.
Claim 5
Dependent Claim
35 words
An apparatus according to claim 2 wherein one of the opposite surfaces of the fluidizing zone is formed by stationary surfaces connected to the casing and the other by moving surfaces connected to the rotor.
Claim 6
Dependent Claim
24 words
An apparatus according to claim 2 wherein the projecting portions of said casing and rotor are parallel with the rotation axis of the rotor.
Claim 7
Dependent Claim
27 words
An apparatus according to claim 2 wherein the projecting portions of said casing and rotor are directed at an angle with the rotation axis of the rotor.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 3 wherein at least one of said opposite surfaces of the fluidizing zone is provided with openings.
Claim 9
Dependent Claim
73 words
An apparatus according to claim 2 including a fluidizing zone formed by an inner surface of a screen drum connected to a rotatable shaft and having a plurality of adjacent rings, side surfaces projected inwards of bars mounted close to the inner surface of the screen drum, said bars extending axially, and triangular in cross-section and connected to the casing, and by the outer face of a triangular rotor inside the screen drum.
Claim 10
Dependent Claim
101 words
An apparatus according to claim 7 including triangular bars located outside the screen drum; a casing wall having axial ribs and surrounding the screen drum and to-gether with the screen drum forming a fluidizing zone outside the screen drum; an inlet opening for the fibre suspension to be fluidized and screened and an outlet opening for the reject, component of the suspension, said inlet and outlet openings being connected to the fluidizing zone inside the screen drum; and an outlet opening for the screened component of the suspension, said outlet opening being connected to the fluidizing zone outside the screen drum.
Claim 11
Dependent Claim
46 words
An apparatus according to claim 2 including a fluidizing zone formed by inner surfaces of a cylindrical top part and a conical bottom part of the casing and provided with internal axial ribs and by the outer surface of a rotor provided with external axial ribs.
Claim 12
Dependent Claim
112 words
An apparatus according to claim 9 further including a rod mounted in the rotor and provided with axial ribs, said rod forming together with the inner surface of the rotor provided with ribs a fluidizing zone inside the rotor; a pump housing mounted on the top part of the casing, in which pump housing an impeller connected to the rotor is disposed; an inlet pipe for the fibre suspension to be introduced, said inlet pipe being connected to the fluidizing zone outside the rotor; an outlet pipe for the reject component of the suspension disposed between the fluidizing zones; and an outlet pipe, said outlet pipe being connected to the pump housing.
References Cited (Backward Citations)
No citation records indexed.
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