US3672503A - Centrifugal separator for fibrous material - Google Patents

Centrifugal separator for fibrous material Download PDF

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Publication number
US3672503A
US3672503A US824949A US3672503DA US3672503A US 3672503 A US3672503 A US 3672503A US 824949 A US824949 A US 824949A US 3672503D A US3672503D A US 3672503DA US 3672503 A US3672503 A US 3672503A
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Prior art keywords
passage
fibers
inlet
outlet
centrifugal separator
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US824949A
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English (en)
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Andre Mark
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C1/00—Apparatus in which the main direction of flow follows a flat spiral ; so-called flat cyclones or vortex chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres

Definitions

  • ABSTRACT A centrifugal separator with a circular inner chamber and an outer chamber of decreasing cross section from a relatively large tangential inlet to a relatively small tangential outlet.
  • the two chambers communicate through a semicircular arrangement of individually adjustable blades forming a portion of the boundary between the chambers extending between the tangential inlet and outlet.
  • the invention aims at counteracting the above disadvantages and, while maintaining them suspended in the air, permit the separation of two categories of fibers with a granulometric cutting limit that can be adjusted as desired, and this from either one single pulverizer or from several ones having an identical regulating device and, consequently, producing the same quality of fibers.
  • the invention intends also to restrict the required power and to reduce the fire and explosion hazards.
  • the invention has in view to effect the pneumatic conveyance of the fibers before the separation with an economical relationship air weight/fiber weight, independent of the one required by the dispersion device and, at the same time, reducing the risk of accidents during the pneumatic conveyance.
  • the invention permits to utilize a combination of two selector apparatus for eventually getting three fiber qualities as, for instance, fine fibers for the outer layers, coarse fibers for the inner layer, and superfine fibers suitable for covering at least one of the two exterior layers; thus a very smooth surface is obtainable, giving the board a pleasing look and permitting the application to it special finishes without any particularly complicated preliminary treatments.
  • an air current with fibers of various dimensions suspended in it, is carried into the centrifugal separator, from which a flow of coarse fibers and a flow of fine fibers are received separately, and each of these currents is conveyed to the suction of an individual fan where it is supplemented with a certain quantity of adjustable air, in such a way that the fan sends to the forming wire an air current carrying fibers of the desired dimension and with a weight relationship of the air and the fibers representing the optimum for depositing the fibers onto the carpet.
  • the air current originating in the first separator and carrying the finer fibers it is also possible to send into a second separator the air current originating in the first separator and carrying the finer fibers, and then to subdivide these finer fibers into fine fibers proper and superfine fibers which will be deposited on the upper face of the mattress, before the latter leaves the apparatus where it was produced.
  • several separator devices can be combined so that, firstly, a layer of fine fibers destined to make up one of the outer surfaces of the board will be deposited on the forming carpet; thereafter, one or several layers of coarse fibers to constitute the core, then a layer of fine fibers and, finally, a last layer of superfine fibers, suitable to complete the other exterior surface of the board.
  • the invention includes a particular type of centrifugal separator, especially adapted for carrying out the abovedescribed procedure.
  • FIG. 1 is a schematic vertical section of a machine proposed by the invention.
  • FIG. 2 is a cross section of the novel centrifugal separator.
  • FIG. 3 is a vertical section according to III-III (FIG. 2).
  • FIG. 4 is the section of one blade (vane) of the separator of FIG. 3.
  • FIG. 5 is a detail section along the axis of one blade.
  • FIG. 6 is an end view, corresponding to FIG. 5.
  • FIG. 7 is a section of a device of calibrated orifice.
  • FIG. 8 is the scheme of another embodiment of the machine according to the invention.
  • FIG. 9 is a section of the corresponding mattress.
  • each ventilator, 6 and 7 is joined to a vertical diffuser, l2 and 13 respectively, which opens into a distribution compartment, 14 and 15 respectively.
  • the two compartments, 14 and 15, are disposed one following the other above the horizontal upper surface of a forming wire 16, arranged and fixed in the usual manner in the form of a wire guaze.
  • This wire circulates on the perforated casing 17a, respectively 18 a, of two suction boxes below, 17 and 18, associated with the two respective compartments l4 and 15.
  • Each of these boxes is joined by a pipe, 19 and 20, to a separate suction fan, 21 and 22 respectively.
  • Pipe 1 is actually joined through a drier and a pneumatic conveyor to the exit opening of a pulverizer dispensing fibers of a medium and very varied granulometry, i.e., it produces a mixture of coarse, medium, and fine fibers.
  • the forcing of the mixture into pipe 1 is effected by an air current that can be adjusted at will in order to obtain an optimal conveyance effect (i.e., with a relatively weak air weight).
  • the separator 2 divides the mixture, so that the coarse fibers come out of pipe 3 and the fine ones of pipe 4.
  • the fibers having been separated and still carried by the air current, arrive at therespective ventilators 6 and 7; these send them into compartments 14 and 15, after adding to the conveyance air current coming from pipe 1 a supplementary fraction of the surrounding air, which can be adjusted at will by blades (not shown).
  • blades not shown.
  • the compound mattress made in this manner can then be subjected to the action of the usual heating plates which compress it in order to polymerize the resin applied preliminarily to impregnate the fibers.
  • FIG. 2 and 3 show a preferred form of separator construction of a second type. It consists of a spiral-shaped outer shell 23 made of any appropriate material and two tangential pipes, namely a first one 23a, of a larger diameter and corresponding to the opening of pipe 1, and a second one 23b, of a smaller diameter and destined to be connected with pipe 3.
  • the outer shell 23 has moreover a central orifice or pipe 23c to which pipe 4 of FIG. 1 is joined.
  • Orifice 23c is surrounded by a crown of adjustable vanes (blades) 24 arranged on a circular arch of somewhat less than 180 between the inner faces of pipes 23a and 23b (i.e., their faces nearest the center).
  • axes 25 are mounted on individual axes 25 (FIGS. 4 to 6) rotating in bearings 26 that are attached to the walls of the outer shell 23; one end of every one of the mentioned axes is provided with a regulating arm 27 that can be blocked in position on an incurved clamp mounted on the outer shell.
  • the clamp 28 is provided with a circular-arch aperture 28a, into which a pin 29 can be introduced, which also passes through the arm 27.
  • the air and fiber mixture revolves counterclockwise, as indicated by the arrow.
  • a fraction of this air passes the crown of vanes somewhat forward of the entry of tube (pipe) 23b (arrow a), whereas another fraction of the air within the crown is sucked by vortex effect between the vanes situated nearest pipe 23a (arrow b).
  • the air current of arrows a carries the finest and a little fraction of coarser fibers along with it.
  • the regulating of the granulometric cutting can be done by adjusting the orientation of the vanes 24 or acting on the relative depressions at pipes 23b and 230 respectively (ventilators 6 and 7 of FIG. 1 and regulating devices or by both procedures simultaneously.
  • FIG. 7 shows the detail of a regulating device 5.
  • the latter is shaped as a double cone, and its diameter at the neck is appropriately calibrated.
  • Such a double cone plays the same role as a calibrated orifice proper, but it has the enormous advantage of not provoking eddy-currents that give rise to inopportune (ill-timed) fiber deposits.
  • the depressions in pipes 3 and 4 can be adjusted at will.
  • FIG. 8 shows another form of constructing a machine in accordance with the invention.
  • the represented equipment consists of an initial portion practically identical with the one described in regard to FIG. I.
  • pipe 1 we have again pipe 1
  • a second one consisting of a pipe 30 carrying a mixture of fibers, a first separator 31, similar to separator 2; this separator 31 has also an opening 32 for coarse fibers and an opening 33 for fines fibers.
  • Pipe 32 leads directly to the opening of a ventilator 34, joined to a diffuser 35; the latter is associated with a distributing compartment 36 and a suction caisson 37 placed right next after caisson 18.
  • pipe 33 carrying fine fibers is linked up with a second centrifugal separator 38 of the same construction as separator 31.
  • This separator 38 is connected by tube (pipe) 39 to a ventilator 40; associated with the latter are: a diffuser 41, a distributing compartment 42, and a suction caisson 43, placed right next to caisson 37.
  • a ventilator 40 associated with the latter are: a diffuser 41, a distributing compartment 42, and a suction caisson 43, placed right next to caisson 37.
  • the central exit of separator 38 is connected by pipe 44 with a ventilator 45 to which correspond: a diffuser .46, a distributing compartment 47, and a suction box 48, disposed down from caisson 43.
  • the first distribution compartment 14 provides wire 16 with a layer of fine fibers C (FIG. 9).
  • a first layer D of coarse fibers is superposed on this lowest layer.
  • this first lag 2r of coarse fibers receives another one E of identical fi rs.
  • the mattress made thus far recerves an upper layer F of relatively fine fibers in compartment 42, and finally, in compartment 47 a final layer of superfine fibers G is added. In this manner one can obtain a board that looks particularly smooth and carefully done.
  • a centrifugal separator for separating relatively course fibers from relatively fine fibers comprising a spiral-shaped body, said body being provided with a tangentially disposed inlet passage for the entry of an air current carrying fibers for separation and a tangentially disposed outlet passage on the opposite side of said body from said inlet passage, a plurality of movable vanes disposed in a semi-circular arrangement within said body, extending between said inlet and outlet passages and separating the interior of said body into an outer spiral passage and an inner circular passage, a central outlet passage communicating with said inner passage and disposed perpendicular to the plane of said inlet and outlet passages, and means for independently adjusting each vane to provide an air current path for recycling certain fibers from said outer passage to said inner passage and back to said outer passage.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US824949A 1968-05-15 1969-05-15 Centrifugal separator for fibrous material Expired - Lifetime US3672503A (en)

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FR69050019 1968-05-15

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US (1) US3672503A (enrdf_load_stackoverflow)
FR (1) FR1592545A (enrdf_load_stackoverflow)
SE (1) SE356464B (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907671A (en) * 1974-12-18 1975-09-23 Jr Joseph F Baigas Separating device
USB330719I5 (enrdf_load_stackoverflow) * 1971-12-06 1976-03-16
US3948771A (en) * 1973-11-30 1976-04-06 Messerschmitt-Bolkow-Blohm Gmbh Method and apparatus for separating suspended matter from a fluid by centrifugal force
US4205965A (en) * 1975-08-30 1980-06-03 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Apparatus and method for separating a specific lighter component from a flowing medium
US4248699A (en) * 1977-07-09 1981-02-03 Kennedy Van Saun Corporation Pneumatic classifier
US4312650A (en) * 1979-10-31 1982-01-26 Ishikawajima-Harima Kukogto Kabushiki Kaisha Particle separator
WO1987005234A1 (en) * 1986-02-28 1987-09-11 Carroll, Noel Cyclone separator
US4836926A (en) * 1986-07-21 1989-06-06 Mineral Deposits Limited Staggered spiral splitters
AU629992B2 (en) * 1986-02-28 1992-10-15 Conoco Specialty Products Inc. Cyclone separator
US5735403A (en) * 1995-03-22 1998-04-07 Stiglianese; Michael L. Apparatus for removal of fine particles in material flow system
NO321638B1 (no) * 2003-05-08 2006-06-12 Aibel As Innlopsanordning og en fremgangsmate for a kontrollere introduksjon av et fluid i en separator
US20080128331A1 (en) * 2006-11-30 2008-06-05 Palo Alto Research Center Incorporated Particle separation and concentration system
US20090050538A1 (en) * 2006-11-30 2009-02-26 Palo Alto Research Center Incorporated Serpentine structures for continuous flow particle separations
US20090114607A1 (en) * 2007-11-07 2009-05-07 Palo Alto Research Center Incorporated Fluidic Device and Method for Separation of Neutrally Buoyant Particles
US20090283452A1 (en) * 2006-11-30 2009-11-19 Palo Alto Research Center Incorporated Method and apparatus for splitting fluid flow in a membraneless particle separation system
US20090283455A1 (en) * 2006-11-30 2009-11-19 Palo Alto Research Center Incorporated Fluidic structures for membraneless particle separation
US8357232B1 (en) * 2009-03-09 2013-01-22 Casella Waste Systems, Inc. System and method for gas separation
US20130092272A1 (en) * 2010-04-29 2013-04-18 Mineral Technologies Pty Ltd Adjustable Diverter or Flow Controller for a Flow Apparatus
US9862624B2 (en) 2007-11-07 2018-01-09 Palo Alto Research Center Incorporated Device and method for dynamic processing in water purification
US20190001348A1 (en) * 2017-06-28 2019-01-03 Eteros Technologies Inc. Centrifugal gas separator
EP2855108B1 (en) * 2012-06-01 2020-03-18 Sunds Fibertech AB Blow line with a bend, and fibers-processing plant with a blow line
US20230001432A1 (en) * 2020-03-06 2023-01-05 Metso Outotec Finland Oy Cyclone separator arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403670A1 (de) * 1984-02-03 1985-08-08 Casimir Kast Gmbh & Co Kg, 7562 Gernsbach Verfahren und anlage zum herstellen von fasermatten als ausgangsmaterial fuer pressformteile

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1897195A (en) * 1929-07-18 1933-02-14 British Rema Mfg Co Ltd Centrifugal apparatus for dust extraction
US1914282A (en) * 1931-03-19 1933-06-13 Sr Edward O'toole Filter for removing dust from the air
US2039692A (en) * 1931-08-17 1936-05-05 Hermannus Van Tongeren Dust collector
US2087789A (en) * 1935-08-14 1937-07-20 Thomas B Allardice Cinder removal and disposal apparatus
DE1003016B (de) * 1953-04-17 1957-02-21 Ver Kesselwerke Ag Sichteinrichtung fuer Muehlenfeuerungen
US3001727A (en) * 1957-11-20 1961-09-26 Dca Food Ind Flour milling process
US3091334A (en) * 1959-07-20 1963-05-28 Denver Equip Co Centrifugal separation method and means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1897195A (en) * 1929-07-18 1933-02-14 British Rema Mfg Co Ltd Centrifugal apparatus for dust extraction
US1914282A (en) * 1931-03-19 1933-06-13 Sr Edward O'toole Filter for removing dust from the air
US2039692A (en) * 1931-08-17 1936-05-05 Hermannus Van Tongeren Dust collector
US2087789A (en) * 1935-08-14 1937-07-20 Thomas B Allardice Cinder removal and disposal apparatus
DE1003016B (de) * 1953-04-17 1957-02-21 Ver Kesselwerke Ag Sichteinrichtung fuer Muehlenfeuerungen
US3001727A (en) * 1957-11-20 1961-09-26 Dca Food Ind Flour milling process
US3091334A (en) * 1959-07-20 1963-05-28 Denver Equip Co Centrifugal separation method and means

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB330719I5 (enrdf_load_stackoverflow) * 1971-12-06 1976-03-16
US4001121A (en) * 1971-12-06 1977-01-04 Messerschmitt-Bolkow-Blohm Gmbh - Division Hamburger Flugzeugbau Centrifugal treatment of fluids
US3948771A (en) * 1973-11-30 1976-04-06 Messerschmitt-Bolkow-Blohm Gmbh Method and apparatus for separating suspended matter from a fluid by centrifugal force
US3907671A (en) * 1974-12-18 1975-09-23 Jr Joseph F Baigas Separating device
US4205965A (en) * 1975-08-30 1980-06-03 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Apparatus and method for separating a specific lighter component from a flowing medium
US4248699A (en) * 1977-07-09 1981-02-03 Kennedy Van Saun Corporation Pneumatic classifier
US4312650A (en) * 1979-10-31 1982-01-26 Ishikawajima-Harima Kukogto Kabushiki Kaisha Particle separator
WO1987005234A1 (en) * 1986-02-28 1987-09-11 Carroll, Noel Cyclone separator
AU606589B2 (en) * 1986-02-28 1991-02-14 Conoco Specialty Products Inc. Cyclone separator
AU629992B2 (en) * 1986-02-28 1992-10-15 Conoco Specialty Products Inc. Cyclone separator
US4836926A (en) * 1986-07-21 1989-06-06 Mineral Deposits Limited Staggered spiral splitters
US5735403A (en) * 1995-03-22 1998-04-07 Stiglianese; Michael L. Apparatus for removal of fine particles in material flow system
NO321638B1 (no) * 2003-05-08 2006-06-12 Aibel As Innlopsanordning og en fremgangsmate for a kontrollere introduksjon av et fluid i en separator
US20070095032A1 (en) * 2003-05-08 2007-05-03 Nilsen Paal J Inlet device and a method of controlling the introduction of a fluid into a separator
US7625416B2 (en) 2003-05-08 2009-12-01 Aibel As Inlet device and a method of controlling the introduction of a fluid into a separator
US20090283452A1 (en) * 2006-11-30 2009-11-19 Palo Alto Research Center Incorporated Method and apparatus for splitting fluid flow in a membraneless particle separation system
US8869987B2 (en) 2006-11-30 2014-10-28 Palo Alto Research Center Incorporated Serpentine structures for continuous flow particle separations
US9486812B2 (en) 2006-11-30 2016-11-08 Palo Alto Research Center Incorporated Fluidic structures for membraneless particle separation
EP1942329A3 (en) * 2006-11-30 2008-10-29 Palo Alto Research Center Incorporated Particle separation and concentration system
US20090283455A1 (en) * 2006-11-30 2009-11-19 Palo Alto Research Center Incorporated Fluidic structures for membraneless particle separation
US20080128331A1 (en) * 2006-11-30 2008-06-05 Palo Alto Research Center Incorporated Particle separation and concentration system
EP2378268A1 (en) * 2006-11-30 2011-10-19 Palo Alto Research Center Incorporated Particle separation and concentration system
US8276760B2 (en) 2006-11-30 2012-10-02 Palo Alto Research Center Incorporated Serpentine structures for continuous flow particle separations
US9433880B2 (en) 2006-11-30 2016-09-06 Palo Alto Research Center Incorporated Particle separation and concentration system
US8931644B2 (en) 2006-11-30 2015-01-13 Palo Alto Research Center Incorporated Method and apparatus for splitting fluid flow in a membraneless particle separation system
US20090050538A1 (en) * 2006-11-30 2009-02-26 Palo Alto Research Center Incorporated Serpentine structures for continuous flow particle separations
US20090114607A1 (en) * 2007-11-07 2009-05-07 Palo Alto Research Center Incorporated Fluidic Device and Method for Separation of Neutrally Buoyant Particles
US9862624B2 (en) 2007-11-07 2018-01-09 Palo Alto Research Center Incorporated Device and method for dynamic processing in water purification
US10052571B2 (en) 2007-11-07 2018-08-21 Palo Alto Research Center Incorporated Fluidic device and method for separation of neutrally buoyant particles
US20130025455A1 (en) * 2009-03-09 2013-01-31 Morrison Garrett L System and method for gas separation
US8357232B1 (en) * 2009-03-09 2013-01-22 Casella Waste Systems, Inc. System and method for gas separation
US20130092272A1 (en) * 2010-04-29 2013-04-18 Mineral Technologies Pty Ltd Adjustable Diverter or Flow Controller for a Flow Apparatus
US9132433B2 (en) * 2010-04-29 2015-09-15 Mineral Technologies Pty Ltd Adjustable diverter or flow controller for a flow apparatus
EP2855108B1 (en) * 2012-06-01 2020-03-18 Sunds Fibertech AB Blow line with a bend, and fibers-processing plant with a blow line
US20190001348A1 (en) * 2017-06-28 2019-01-03 Eteros Technologies Inc. Centrifugal gas separator
US10646885B2 (en) * 2017-06-28 2020-05-12 Eteros Technologies Inc. Centrifugal gas separator
US20230001432A1 (en) * 2020-03-06 2023-01-05 Metso Outotec Finland Oy Cyclone separator arrangement
US12030065B2 (en) * 2020-03-06 2024-07-09 Metso Metals Oy Cyclone separator arrangement

Also Published As

Publication number Publication date
FR1592545A (enrdf_load_stackoverflow) 1970-05-19
SE356464B (enrdf_load_stackoverflow) 1973-05-28

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