EP0599088B1 - Vorrichtung zum Abscheiden schwerer Partikel von einem Strom mit faserigem Material - Google Patents

Vorrichtung zum Abscheiden schwerer Partikel von einem Strom mit faserigem Material Download PDF

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Publication number
EP0599088B1
EP0599088B1 EP93117644A EP93117644A EP0599088B1 EP 0599088 B1 EP0599088 B1 EP 0599088B1 EP 93117644 A EP93117644 A EP 93117644A EP 93117644 A EP93117644 A EP 93117644A EP 0599088 B1 EP0599088 B1 EP 0599088B1
Authority
EP
European Patent Office
Prior art keywords
chamber
flow
fiber
fiber material
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP93117644A
Other languages
English (en)
French (fr)
Other versions
EP0599088A1 (de
Inventor
Per Perman
Peter Bolt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet AB
Original Assignee
Sunds Defibrator Industries AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Sunds Defibrator Industries AB filed Critical Sunds Defibrator Industries AB
Publication of EP0599088A1 publication Critical patent/EP0599088A1/de
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Publication of EP0599088B1 publication Critical patent/EP0599088B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
    • 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
    • B27N1/00—Pretreatment of moulding material

Definitions

  • This invention relates to an apparatus for separation of impurities from a fiber material at the manufacture of fibreboard according to the dry method.
  • Heavy particles such as shives, splinters, glue lumps, sand, scrap etc. are separated at different occasions in the process.
  • the raw material in the form of wood chips, is defibered so that the fibers are exposed.
  • This fiber material is thereafter treated with glue, dried, formed to a fiber mat, compressed and pressed in a hot press. It is essential at this process that impurities and other undesirable heavy particles are removed from the fiber material prior to the forming and pressing process.
  • impurities and other undesirable heavy particles are removed from the fiber material prior to the forming and pressing process.
  • the present invention offers a solution for the aforesaid problems. It relates to a separation apparatus of simple design, which efficiently removes heavy impurities from the fiber material.
  • the apparatus comprises a vertical cylindric chamber 10, to which an inlet 11 for the fiber material is connected.
  • the inlet 11 consists of a pipe, which extends inward to the centre of the lower portion of the chamber 10.
  • the inlet is directed upward, and in front of its mouth a plane horizontal retardation member 12 is located, which is intended to stop the vertical speed of the ingoing fiber flow and deflect the fiber flow laterally.
  • the upper side can be plane or possibly upward tapering.
  • an outlet 13 for accepted fibers, and in the bottom of the chamber an outlet 14 for separated heavy particles (reject) are located at the top of the chamber 10 .
  • This reject outlet 14 can be provided with a sluice means 15, for example in the form of two tight dampers.
  • ducts 16 are provided for the supply of a continuous and uniformly distributed base flow of gas, for example air. These ducts 16 are connected to an air distribution space 17, which distributes the air symmetrically into the chamber 10 through an adjustable slot 18 extending all about the entire circumference of the chamber 10.
  • the fiber material to be screened is supplied through the inlet pipe 11 in the form of an airborne fiber flow with a flow rate of 15-45 m/s.
  • the fiber flow meets the retardation member 12, which stops the vertical speed of the fiber flow and deflects and distributes the fiber flow outward.
  • the upwardly directed continuous base flow of air then catches up the fiber material, and a stable, substantially highly uniform and even flow is obtained quickly, which implies the possibility of a restricted height of the chamber 10.
  • Acceptable fibers are carried by the base flow, while heavy particles with a higher fall rate drop down to the bottom of the chamber. This reject is discharged via the dampers of the sluice means 15.
  • the acceptable fibers are moved upward by the upward air flow.
  • a by-pass shunt 19 with an air damper 20 controlled by a scanning device 21 for the pressure drop between the chamber 10 and outlet 13, the separation process and fiber transport can be controlled in a simple and efficient way.
  • the circular shape of the chamber 10 yields an air flow distributed across the cross-section.
  • the slot 18 of the air distribution space 17 causes the ingoing air to be directly distributed across the entire cross-section. This in its turn prevents a strong local turbulence, and the risk of separated particles being sucked along is at a minimum.
  • the separation apparatus is particularly suitable for use in a process for making fibreboard, where air transports the fiber material from defibration via gluing and drying to forming. Heavy particles such as undefibered material and lumped glue, resin and latex particles etc. must be removed in some way.
  • the present invention renders it possible to separate these impurities rapidly and efficiently.
  • the separation process can be easily controlled, and the apparatus can be located in a suitable place, preferably between drying and forming, in existent installations as well as in new ones.
  • the accepted fibers are continued to be transported from the outlet 13 of the chamber 10, for example to a fiber bin or a forming arrangement.
  • the separation process is very sensitive to variations in temperature and air humidity and, therefore, an automatic control of the air flow rate is essential and in many cases a prerequisite for a successful result.
  • This problem has been solved by the apparatus described above.
  • the air flow to the base flow thus, is controlled in that a minor air flow is shunted the chamber 10 through the duct 19 where the flow is adjusted by means of the damper 20.
  • This damper is controlled by the scanning device 21 for the difference pressure between the chamber 10 and the outlet 13.
  • the adjustable slot 18 yields a low air rate with the possibility of local adjustment of the air flow for a uniform distribution about the entire circumference.
  • transport air for the fibers to the fiber inlet 11 and as a base flow preferably air is used, the largest part of which is taken from the vacuum boxes of the forming arrangement, i.e. the transport air which is separated at the forming of a fiber mat on an air-pervious support.
  • a separate fan preferably is provided for the transport of air/fibers to the chamber 10.
  • the separation apparatus thereby can be located in any optional place between the fiber dryer and the forming arrangement.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)

Claims (6)

  1. Vorrichtung zum Abscheiden schwerer Partikel aus einem Strom mit darin schwebendem Fasermaterial bei der Herstellung von Faserplatten nach der Trockenmethode, umfassend eine vertikale zylindrische Kammer (10) mit einem Einlaß (11) für eingeführtes Fasermaterial und getrennte Auslässe (13 bzw. 14) für Fasern und schwere Partikel im Oberteil bzw. am Boden der Kammer (10) und mit wenigstens einer Leitung (16), die an den Boden der Kammer (10) zum Zuführen eines kontinuierlichen Basisluftstroms nach oben durch die Kammer bei einem solchen Durchsatz angeschlossen ist, daß er die Fasern, aber nicht die schweren Partikel tragen kann,
    dadurch gekennzeichnet,
    daß der Einlaß (11) für das Fasermaterial nach oben gerichtet und mittig im unteren Abschnitt der Kammer (10) über der Zuführungsleitung (16) für den Basisstrom angeordnet ist, und daß ein ebenes horizontales Verzögerungselement (12) in Verbindung mit dem Einlaß (11) für das Fasermaterial so vorgesehen ist, daß die vertikale Geschwindigkeit des eintretenden Faserstroms unterbrochen und der Faserstrom nach außen abgelenkt und verteilt wird.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Leitung (16) zum Zuführen des Basisluftstroms an einen Luftverteilerraum (17) am Kammerboden angeschlossen ist, wobei dieser Raum mit der Kammer über einen einstellbaren Schlitz (18) in Verbindung steht, der sich um die Kammer herum erstreckt.
  3. Vorrichtung nach einem der Ansprüche 1-2,
    dadurch gekennzeichnet,
    daß eine Schleuseneinrichtung (15) im Boden der Kammer (10) zum Austragen der abgetrennten schweren Partikel angeschlossen ist.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet,
    daß sie eine Einrichtung zum Steuern des Luftstroms zum Basisstrom aufweist, umfassend einen Kanal (19) mit einem Schieber (20) zum gesteuerten Bypass-Ablenken eines kleineren Teils des Luftstroms an der Kammer (10) vorbei.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet,
    daß ein getrenntes Lüfterrad vorgesehen ist, um den Luft/Faserstrom zum Fasereinlaß (11) in der Kammer (10) zu befördern.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet,
    daß sie in einer Fasertransportleitung zwischen einem Fasertrockner und einer Anordnung zur Ausbildung von Faserplatten angeordnet ist.
EP93117644A 1992-11-25 1993-10-30 Vorrichtung zum Abscheiden schwerer Partikel von einem Strom mit faserigem Material Revoked EP0599088B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9203535A SE500554C2 (sv) 1992-11-25 1992-11-25 Anordning för avskiljning av föroreningar
SE9203535 1992-11-25

Publications (2)

Publication Number Publication Date
EP0599088A1 EP0599088A1 (de) 1994-06-01
EP0599088B1 true EP0599088B1 (de) 1997-01-15

Family

ID=20387922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93117644A Revoked EP0599088B1 (de) 1992-11-25 1993-10-30 Vorrichtung zum Abscheiden schwerer Partikel von einem Strom mit faserigem Material

Country Status (5)

Country Link
EP (1) EP0599088B1 (de)
AT (1) ATE147667T1 (de)
DE (1) DE69307477T2 (de)
ES (1) ES2098627T3 (de)
SE (1) SE500554C2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514379C2 (sv) * 1995-03-23 2001-02-19 Mrt System Ab Förfarande och system för mekanisk separering av material från kasserade lysrör och liknande lampor som sönderdelas
DE19812505C2 (de) * 1997-06-06 2001-03-08 Robert Nyblad Gmbh Verfahren und Vorrichtung zur Aufbereitung von verklumptem oder agglomeriertem Material durch in der Aufbereitungsflüssigkeit erzeugte Druckwellen
DE19835771A1 (de) 1998-08-07 2000-02-17 Eisfeld Jens Gerrit Verfahren und Vorrichtung zur Gewinnung eines als Rohstoff zu Isolierzwecken oder zur Vliesherstellung oder als Füll- oder Polsterstoff geeigneten Fasermaterials und Verwendung des Fasermaterials
GB9916246D0 (en) * 1999-07-12 1999-09-15 Vapormatt Ltd Particle separation assembly
CN103521446A (zh) * 2013-10-22 2014-01-22 广东中烟工业有限责任公司 一种两级分离式梗签、烟丝分离装置
JP6410976B1 (ja) * 2018-03-14 2018-10-24 新日鉄住金エンジニアリング株式会社 成型体の製造方法及び炭化物の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877861A (en) * 1927-12-02 1932-09-20 Minnesota Mining & Mfg Process of and apparatus for separating materials
DE589578C (de) * 1928-09-11 1933-12-09 Karl Schubert Vorrichtung zum Sortieren, Reinigen oder Sichten von Getreide und anderen Stoffen
US2766880A (en) * 1951-08-04 1956-10-16 Ruhrchemie Ag Separation of fine-grained portions from granular materials
GB1211292A (en) * 1967-02-17 1970-11-04 Du Pont Separation of solid adulterants from regularly-shaped particulate solids in a carrier gas
US3975263A (en) * 1975-02-25 1976-08-17 Elo Heikki K Material separation apparatus and method
WO1992005882A1 (en) * 1990-09-28 1992-04-16 ABB Fläkt AB Method and device for separating heavy particles from a particulate material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877861A (en) * 1927-12-02 1932-09-20 Minnesota Mining & Mfg Process of and apparatus for separating materials
DE589578C (de) * 1928-09-11 1933-12-09 Karl Schubert Vorrichtung zum Sortieren, Reinigen oder Sichten von Getreide und anderen Stoffen
US2766880A (en) * 1951-08-04 1956-10-16 Ruhrchemie Ag Separation of fine-grained portions from granular materials
GB1211292A (en) * 1967-02-17 1970-11-04 Du Pont Separation of solid adulterants from regularly-shaped particulate solids in a carrier gas
US3975263A (en) * 1975-02-25 1976-08-17 Elo Heikki K Material separation apparatus and method
WO1992005882A1 (en) * 1990-09-28 1992-04-16 ABB Fläkt AB Method and device for separating heavy particles from a particulate material

Also Published As

Publication number Publication date
DE69307477D1 (de) 1997-02-27
SE9203535D0 (sv) 1992-11-25
EP0599088A1 (de) 1994-06-01
ATE147667T1 (de) 1997-02-15
DE69307477T2 (de) 1997-05-15
ES2098627T3 (es) 1997-05-01
SE9203535L (sv) 1994-05-26
SE500554C2 (sv) 1994-07-11

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