EP0132141A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Centrifugal cleaning of paper making stock
Assignee: Black Clawson (France) SA
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Filing: 1984-07-13
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Granted: —
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Expires: 2004-07-13
Abstract
Abstract A system for separating paper fibers from contaminants of similar lower specific gravities employs a reverse centrifugal cleaner (110) wherein the discharge port for lights (reject) is located at the apex of the internally conical cleaner body (125). The discharge port is formed by a tube (123) which has its inner end located in the open apex end of the cleaner body (125) and is of smaller diameter than said apex end to define therewith an annular discharge outlet for heavies (accepts). The tube is releasably secured in position by bayonet locking means (136) so that it can be temporarily retracted to relieve blockage of the heavies outlet.
Inventors
- 👤 Terry L. Bliss
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:34
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/18; D21D5/24; B; B04; B04C; B04C11/00; B04C3/00; B04C3/06; B04C5/00; B04C5/22; B04C5/24; B04C5/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
288 words
A system for separating paper making fibers from light contaminants of similar and lower specific gravities, characterised by: (a) means for forming a pumpable aqueous slurry wherein the solid constituents consist essentially of paper fibers and one or more light contaminants such as wax and plastic fragments similar in size to and not sufficiently greater in specific gravity than wet paper fibers for separation by conventional centrifugal cleaning technique, (b) an internally conical vessel (125) having an inlet port (140) adjacent the base end thereof and the apex end thereof being open, (c) housing means (126, 131) defining a chamber (145) surrounding said open apex end of said vessel, (d) a first outlet port (146) from said chamber (145) through the wall of said housing means (126, 131), (e) an outlet tube (123) supported in said housing means (126, 131) with the inner end thereof positioned in said open end of said vessel (125) and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145), (f) means for supplying said slurry to said vessel (125) through said inlet port (140) at a sufficiently high flow rate circumferentially of said vessel and under sufficient pressure to develop in said vessel centrifugal force conditions causing vortical separation of said slurry within said vessel into an outer fraction containing the large majority of the paper fibers and an inner fraction containing the large majority of said light contaminant materials, and (g) means (50, 51) for controlling the discharge flows from both of said outlet ports to cause said outer fraction to discharge through said annular second outlet port into said chamber (145) and said second fraction to discharge through said tube (123).
Claim 2
Independent Claim
288 words
A system for separating paper making fibers from light contaminants of similar and lower specific gravities, characterised by: (a) means for forming a pumpable aqueous slurry wherein the solid constituents consist essentially of paper fibers and one or more light contaminants such as wax and plastic fragments similar in size to and not sufficiently greater in specific gravity than wet paper fibers for separation by conventional centrifugal cleaning technique, (b) an internally conical vessel (125) having an inlet port (140) adjacent the base end thereof and the apex end thereof being open, (c) housing means (126, 131) defining a chamber (145) surrounding said open apex end of said vessel, (d) a first outlet port (146) from said chamber (145) through the wall of said housing means (126, 131), (e) an outlet tube (123) supported in said housing means (126, 131) with the inner end thereof positioned in said open end of said vessel (125) and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145), (f) means for supplying said slurry to said vessel (125) through said inlet port (140) at a sufficiently high flow rate circumferentially of said vessel and under sufficient pressure to develop in said vessel centrifugal force conditions causing vortical separation of said slurry within said vessel into an outer fraction containing the large majority of the paper fibers and an inner fraction containing the large majority of said light contaminant materials, and (g) means (50, 51) for controlling the discharge flows from both of said outlet ports to cause said outer fraction to discharge through said annular second outlet port into said chamber (145) and said second fraction to discharge through said tube (123).
Claim 3
Dependent Claim
45 words
The system defined in claim 1, further comprising means (136, 137, 138) releasably securing said tube (123) to said housing means (126, 131) to provide for release and temporary retraction of said tube for the relief of a blockage of said annular second outlet port.
Claim 4
Dependent Claim
36 words
The system defined in claim 2, wherein said releasable securing means (136, 137, 138) maintain the inner end of said tube (123) in substantially the same radial plane with the apex end of said vessel (125).
Claim 5
Dependent Claim
127 words
A centrifugal cleaner particularly adapted for separating paper making fibers from light contaminants of similar and lower specific gravities, characterised by: (a) an internally conical vessel (125) having an inlet port (140) adjacent the base end thereof and the apex end thereof being open, (b) housing means (126, 131) defining a chamber (145) surrounding said open apex end of said vessel, (c) a first outlet port (146) in the wall of said housing means (126, 131) from said chamber (145), and (d) an outlet tube (123) supported in said housing means (126, 131) with the inner end thereof positioned in said open end of said vessel (125) and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145).
Claim 6
Dependent Claim
127 words
A centrifugal cleaner particularly adapted for separating paper making fibers from light contaminants of similar and lower specific gravities, characterised by: (a) an internally conical vessel (125) having an inlet port (140) adjacent the base end thereof and the apex end thereof being open, (b) housing means (126, 131) defining a chamber (145) surrounding said open apex end of said vessel, (c) a first outlet port (146) in the wall of said housing means (126, 131) from said chamber (145), and (d) an outlet tube (123) supported in said housing means (126, 131) with the inner end thereof positioned in said open end of said vessel (125) and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145).
Claim 7
Dependent Claim
47 words
A centrifugal cleaner as defined in claim 4, further comprising means (136, 137, 138) releasably securing said tube (123) to said housing means (126, 131) to provide for release and temporary retraction of said tube for the relief of a blockage of said annular second outlet port.
Claim 8
Dependent Claim
279 words
A multiple centrifugal cleaner assembly for separating paper making fibers from light contaminants, characterised by: (a) an enclosed container (60), (b) wall means (61, 62) within said container dividing the interior thereof into a pair of opposite end chambers (64, 65), (c) a plurality of centrifugal cleaners (110) located within said container, (d) each of said cleaners including a cylindrical-conical vessel (125) having an inlet port (140) adjacent the base thereof and the apex end thereof being open, (e) means supporting said cleaners (110) within said container (60) with said inlet ports (140) thereof in one of said chambers (64) and the apex ends thereof in the other of said chambers (65), (f) said one chamber (64) having an inlet port for receiving an aqueous slurry of paper fibers and light contaminants for delivery to said inlet ports (140) of said cleaners, (g) said other chamber (65) having a discharge port, (h) housing means (126, 131) within said other chamber (65) associated with each said vessel and defining a chamber (145) surrounding said open apex end of said vessel (125), (i) a first outlet port (146) in the wall of each said housing means (126, 131) leading from said chamber (145) thereinto said other chamber (65) in said container (60), (j) an outlet tube (123) supported in each said housing means (126, 131) with the inner end thereof positioned in said open end of the associated said vessel and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145) within said housing means, and (k) the other end of said tube (123) extending to the outside of said container (60).
Claim 9
Dependent Claim
279 words
A multiple centrifugal cleaner assembly for separating paper making fibers from light contaminants, characterised by: (a) an enclosed container (60), (b) wall means (61, 62) within said container dividing the interior thereof into a pair of opposite end chambers (64, 65), (c) a plurality of centrifugal cleaners (110) located within said container, (d) each of said cleaners including a cylindrical-conical vessel (125) having an inlet port (140) adjacent the base thereof and the apex end thereof being open, (e) means supporting said cleaners (110) within said container (60) with said inlet ports (140) thereof in one of said chambers (64) and the apex ends thereof in the other of said chambers (65), (f) said one chamber (64) having an inlet port for receiving an aqueous slurry of paper fibers and light contaminants for delivery to said inlet ports (140) of said cleaners, (g) said other chamber (65) having a discharge port, (h) housing means (126, 131) within said other chamber (65) associated with each said vessel and defining a chamber (145) surrounding said open apex end of said vessel (125), (i) a first outlet port (146) in the wall of each said housing means (126, 131) leading from said chamber (145) thereinto said other chamber (65) in said container (60), (j) an outlet tube (123) supported in each said housing means (126, 131) with the inner end thereof positioned in said open end of the associated said vessel and defining therewith an annular second outlet port leading from the interior of said vessel (125) to said chamber (145) within said housing means, and (k) the other end of said tube (123) extending to the outside of said container (60).
Claim 10
Dependent Claim
83 words
A cleaner assembly as defined in claim 6, wherein each of said cleaners (110) includes means (136, 137, 138) releasably securing each of said tubes (123) to the related said housing means (126, 131) to provide for release and temporary retraction of said tube for the relief of a blockage of the related said annular second outlet port, and further comprising handle means (151) on each of said tubes outside said container (60) for effecting such release and retraction of each said tube.
References Cited (Backward Citations)
No citation records indexed.
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