WO1992005882A1 - Methode et dispositif de separation des particules lourdes d'une matiere particulaire - Google Patents

Methode et dispositif de separation des particules lourdes d'une matiere particulaire Download PDF

Info

Publication number
WO1992005882A1
WO1992005882A1 PCT/SE1991/000603 SE9100603W WO9205882A1 WO 1992005882 A1 WO1992005882 A1 WO 1992005882A1 SE 9100603 W SE9100603 W SE 9100603W WO 9205882 A1 WO9205882 A1 WO 9205882A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
directed
settling chamber
inlet
air
Prior art date
Application number
PCT/SE1991/000603
Other languages
English (en)
Inventor
Ola Larsson
Stig Lennartsson
Original Assignee
ABB Fläkt 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
Application filed by ABB Fläkt AB filed Critical ABB Fläkt AB
Publication of WO1992005882A1 publication Critical patent/WO1992005882A1/fr

Links

Classifications

    • 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
    • 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall

Definitions

  • the present invention relates to a method for sepa ⁇ rating heavy particles, such as lumps of glue, from a particulate material, such as glue-coated wood fibres, which is pneumatically conveyed from a first station, such as a container, to a second station, such as a plant for making fibreboards, said particulate material being introduced in a settling chamber to which a carrier air flow is supplied for entraining the particulate material while heavy particles contained therein fall to the bottom of the settling chamber, said particulate material being introduced in the settling chamber as a downwardly- directed flow of material through a downwardly-directed chamber inlet and leaving the settling chamber in an upwardly-directed flow of material and air through a cham ⁇ ber outlet located beside said inlet.
  • the invention also concerns a device for separating heavy particles from a particulate material.
  • glue-coated wood fibres are pneumatically conveyed, first from a drying plant to a collecting container, and from there to a forming station, where the fibres are spread as a mat on a wire through which the carrier air is drawn off. Then, the fibre mat is compressed into fibreboards under set pressure and tem ⁇ perature conditions.
  • One object of the present invention is, therefore, to provide a method which makes it possible to utilise a relatively small carrier air flow in the separation and, consequently, to perform the separation during the trans ⁇ port of the wood fibres from the container to the forming station.
  • this object is achieved by a method which is of the type stated by way of intro- duction and which is characterised in that compressed-air jets, which are directed obliquely towards the downwardly- directed flow of material, are blown into the settling chamber to decelerate the flow of material and to spread it in its transverse direction towards the outlet, and that the carrier air flow is blown into the settling cham ⁇ ber to encounter from below the decelerated, transversely spread flow of material so as to form therewith said flow of material and air.
  • Another object of the invention is to provide a suit ⁇ able device for implementing the method.
  • this object is achieved by a device which has a settling chamber with a down- wardly-directed inlet for said material and an upwardly- directed outlet located beside said inlet, and which is characterised by a first means for blowing compressed-air jets obliquely towards the downwardly-directed inlet, and a second means for blowing an upwardly-directed carrier air flow into the settling chamber on a level below said first means.
  • the illustrated device is arranged between a con ⁇ tainer (not shown) holding glue-coated wood fibres, and a forming station (not shown) where thin fibreboards are shaped. Further, the device has a settling chamber 1 with a downwardly-directed inlet 2 for supplying the material and an upwardly-directed outlet 3 for discharging the material, the outlet 3 being located beside the inlet 2. Moreover, the inlet 2 communicates with the container from which glue-coated wood fibres are introduced in the settling chamber 1 in the form of a downwardly-directed flow of material Fl.
  • the container preferably is a meter ⁇ ing container which is placed directly on the settling chamber 1 and distributes the flow of material Fl over the entire cross-section of the inlet 2.
  • the outlet 3 communicates with the forming station by means of an upwardly-directed trnsport pipe 4 of upwardly decreasing cross-sectional area.
  • the pipe 4 In its upper portion, the pipe 4 has a 180° bend 4a and, after the bend, branches into two separate conduits 4b and 4c.
  • the conduit 4b leads to the forming station.
  • the device further has an inlet 5 through which a carrier air flow F2 is blown into the lower portion of the settling chamber 1.
  • Adjustable guide rails 6 are provided in the inlet 5 to distribute the carrier air flow over the entire settling chamber 1.
  • a discharge trough 8 is provided at the bottom of the settling chamber 1, and a conveyor screw 9 is arranged in the trough 8 to discharge heavy particles collected therein.
  • the inlet 2 has a perforated metal sheet 10 which is inclined about 50° to the hori ⁇ zontal plane.
  • the sheet 10 is formed with a plurality of perforations which are distributed across the sheet surface and through which the settling chamber 1 communi- cates with a blow box 11.
  • Compressed-air jets S which owing to the inclination of the sheet 10 are directed obliquely upwards, i.e. obliquely towards to the down ⁇ wardly-directed flow of material Fl, are blown into the settling chamber 1 to decelerate the flow of material and to spread it horizon ⁇ tally towards the outlet 3.
  • Glue-coated wood fibres containing impurities in the form of comparatively heavy particles, such as lumps of glue and chips, are, as mentioned earlier, introduced in the settling chamber 1 in the form of a downwardly-direct ⁇ ed flow of material Fl which preferably is spread over the entire cross-section of the inlet 2.
  • the flow of material encounters the compressed-air jets S, and is thus dece ⁇ lerated and spread over the entire cross-section of the settling chamber 1.
  • the carrier air flow F2 supplied through the inlet 5 entrains the particulate material in a flow of material and air F3 through the outlet 3 and the transport pipe 4, while heavy particles fall down into the trough 8 to be discharged by the conveyor screw 9.
  • the carrier air flow can be considerably reduced compared with that required in the prior-art separation method described by way of introduction. This effect is further enhanced when the flow of material Fl is spread, as described above, over the entire cross-section of the inlet 2.
  • the flow of material and air F3 is accele- rated in the transport pipe 4 owing to the decreasing cross-sectional area thereof.
  • the flow then has a high speed in the bend 4a, and the wood fibres therein are thus flung outwards, following the outer wall of the bend 4a and finally being conducted, together with some of the carrier air, into the conduit 4b which leads to the form ⁇ ing station.
  • perforated metal sheets and blow boxes supplementing the metal sheet 10 and the blow box 11 may, for instance, be arranged adjacent to the walls of the discharge trough 8 to enable the injection of oblique ⁇ ly and upwardly directed compressed-air jets. This may be necessary if the discharge of material from the container takes place intermittently, so that the compressed-air jets are unable to decelerate and spread all the material. It may then be necessary to further decelerate and spread the material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

On décrit une méthode permettant de séparer des particules lourdes d'une matière particulaire. Dans ladite méthode, la matière est introduit dans une chambre de décantation (1) vers laquelle un flux d'air porteur (F2) est dirigé pour entraîner la matière, alors que les particules lourdes contenues dans la matière tombent au fond de la chambre de décantation (1). La matière est introduite dans la chambre de décantation (1) sous la forme d'un flux de matière (F1) dirigé vers le bas qui passe par une entrée (2), et est éliminé de la chambre de décantation (1) sous la forme d'un flux de matière et d'air (F3) passant par une sortie (3) se trouvant de l'autre côté de l'entrée. Des jets d'air comprimés (S) dirigés obliquement vers le flux de matière descendant sont propulsés dans la chambre de décantation (1) pour décélérer le flux de matière et pour le propager vers la sortie (3). Le flux d'air porteur (F2) est soufflé dans la chambre de décantation pour y rencontrer le flux de matière décéléré propagé depuis le bas. Un dispositif servant à appliquer la présente méthode comporte une chambre de décantation (1) munie d'une entrée (2) orientée vers le bas (2) et d'une sortie (3) orientée vers le haut située de l'autre côté de l'entrée. Un premier dispositif (10, 11) est conçu pour propulser des jets d'air comprimés (S) obliquement vers la sortie (2). Un second dispositif (5) sert à propulser un flux d'air porteur dirigé vers le haut jusque dans la chambre de décantation (1), ce second dispositif se trouvant sur un plan situé plus bas que le premier dispositif (10, 11).
PCT/SE1991/000603 1990-09-28 1991-09-24 Methode et dispositif de separation des particules lourdes d'une matiere particulaire WO1992005882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9003092A SE467044B (sv) 1990-09-28 1990-09-28 Saett och anordning foer avskiljning av tyngre partiklar fraan ett partikelformigt material
SE9003092-5 1990-09-28

Publications (1)

Publication Number Publication Date
WO1992005882A1 true WO1992005882A1 (fr) 1992-04-16

Family

ID=20380484

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000603 WO1992005882A1 (fr) 1990-09-28 1991-09-24 Methode et dispositif de separation des particules lourdes d'une matiere particulaire

Country Status (4)

Country Link
EP (1) EP0553140A1 (fr)
AU (1) AU8637691A (fr)
SE (1) SE467044B (fr)
WO (1) WO1992005882A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599088B1 (fr) * 1992-11-25 1997-01-15 Sunds Defibrator Industries Aktiebolag Dispositif de séparation de particules lourdes d'un flux de matières fibreuses
US5725102A (en) * 1993-06-18 1998-03-10 Abb Flakt Ab Method and device for separating heavy particles from a particulate material
EP0795359A3 (fr) * 1996-03-14 1998-03-11 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Séparateur pneumatique
ES2113239A1 (es) * 1993-12-17 1998-04-16 Escudero Lozano Jose Sistema neumatico para separar materiales inertes de material vegetal.
WO1998048950A1 (fr) * 1997-04-29 1998-11-05 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Procede et dispositif d'aero-separation
EP0982082A1 (fr) * 1998-08-21 2000-03-01 Beloit Technologies, Inc. Procédé de séparation d' un mélange de particules
WO2001089783A1 (fr) * 2000-05-24 2001-11-29 Flakeboard Company Limited Procede et dispositif pour supprimer les irregularites dans un flux de fibres de bois
US6902125B2 (en) 2000-05-24 2005-06-07 Fritz Schneider Process and device for disintegrating irregularities in flows of wood fibres
DE102011008757A1 (de) 2011-01-17 2012-07-19 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Aussichten von Verunreinigungen aus einem pneumatischen Faserstrom

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1888372A (en) * 1929-08-06 1932-11-22 Birtley Iron Company Ltd Separation of dry materials
US2766880A (en) * 1951-08-04 1956-10-16 Ruhrchemie Ag Separation of fine-grained portions from granular materials
CH322142A (de) * 1954-08-11 1957-06-15 Buehler Ag Geb Vorrichtung zum Reinigen und Sortieren von pneumatisch gefördetem Schüttgut
US2834061A (en) * 1954-05-07 1958-05-13 Lummus Cotton Gin Co Pneumatic fiber cleaning apparatus
DE1802161A1 (de) * 1967-10-10 1969-06-19 Domtar Ltd Verfahren und Vorrichtung zum Klassieren und Abgeben von Material
US4882042A (en) * 1986-01-13 1989-11-21 Sumitomo Chemical Company, Ltd. Floss separating apparatus and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1888372A (en) * 1929-08-06 1932-11-22 Birtley Iron Company Ltd Separation of dry materials
US2766880A (en) * 1951-08-04 1956-10-16 Ruhrchemie Ag Separation of fine-grained portions from granular materials
US2834061A (en) * 1954-05-07 1958-05-13 Lummus Cotton Gin Co Pneumatic fiber cleaning apparatus
CH322142A (de) * 1954-08-11 1957-06-15 Buehler Ag Geb Vorrichtung zum Reinigen und Sortieren von pneumatisch gefördetem Schüttgut
DE1802161A1 (de) * 1967-10-10 1969-06-19 Domtar Ltd Verfahren und Vorrichtung zum Klassieren und Abgeben von Material
US4882042A (en) * 1986-01-13 1989-11-21 Sumitomo Chemical Company, Ltd. Floss separating apparatus and method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599088B1 (fr) * 1992-11-25 1997-01-15 Sunds Defibrator Industries Aktiebolag Dispositif de séparation de particules lourdes d'un flux de matières fibreuses
US5725102A (en) * 1993-06-18 1998-03-10 Abb Flakt Ab Method and device for separating heavy particles from a particulate material
ES2113239A1 (es) * 1993-12-17 1998-04-16 Escudero Lozano Jose Sistema neumatico para separar materiales inertes de material vegetal.
EP0795359A3 (fr) * 1996-03-14 1998-03-11 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Séparateur pneumatique
WO1998048950A1 (fr) * 1997-04-29 1998-11-05 Kvaerner Panel Systems Gmbh Maschinen- Und Anlagenbau Procede et dispositif d'aero-separation
DE19718158C2 (de) * 1997-04-29 2003-04-24 Kvaerner Panel Sys Gmbh Verfahren und Vorrichtung zum windsichtenden Separieren
EP0982082A1 (fr) * 1998-08-21 2000-03-01 Beloit Technologies, Inc. Procédé de séparation d' un mélange de particules
WO2001089783A1 (fr) * 2000-05-24 2001-11-29 Flakeboard Company Limited Procede et dispositif pour supprimer les irregularites dans un flux de fibres de bois
US6902125B2 (en) 2000-05-24 2005-06-07 Fritz Schneider Process and device for disintegrating irregularities in flows of wood fibres
DE102011008757A1 (de) 2011-01-17 2012-07-19 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Aussichten von Verunreinigungen aus einem pneumatischen Faserstrom
WO2012098131A1 (fr) 2011-01-17 2012-07-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé et dispositif de criblage des impuretés contenues dans un flux pneumatique de fibres

Also Published As

Publication number Publication date
EP0553140A1 (fr) 1993-08-04
SE9003092D0 (sv) 1990-09-28
SE467044B (sv) 1992-05-18
SE9003092L (sv) 1992-03-29
AU8637691A (en) 1992-04-28

Similar Documents

Publication Publication Date Title
WO1992005882A1 (fr) Methode et dispositif de separation des particules lourdes d'une matiere particulaire
KR0129104B1 (ko) 고체폐기물분별처리시스템의 분별처리장치
PL226958B1 (pl) Urzadzenie dopneumatycznej separacji podcisnieniowej materiałów masowych
AU682518B2 (en) Method and device for separating heavy particles from a particulate material
CA2420303C (fr) Appareil de triage de copeaux de bois en fractions separees
CA2185735C (fr) Methode et appareil pour separer les particules legeres des particules lourdes
CA1334523C (fr) Methode et appareil pour l'extraction de particules indesirables presentes dans le tabac
US11278934B2 (en) Dedusting apparatus having air knives and ionizing wires
US2328568A (en) Process for dedusting comminuted soap
CN1750765A (zh) 香烟制造方法及香烟制造机
RU78703U1 (ru) Установка пневматической сепарации
US5027835A (en) Apparatus for pneumatic transportation of particulate material such as tobacco
US20060016920A1 (en) Device for feeding wood chips to a processing unit
EP0599088B1 (fr) Dispositif de séparation de particules lourdes d'un flux de matières fibreuses
US6279201B1 (en) Device for distributing particles
JPS63167781A (ja) たばこ加工産業におけるシガレット連続体製造機のための空気案内機構
CN214723474U (zh) 一种用于铸铁件抛光机的分料除尘装置
JP2662117B2 (ja) 気流分級機の粉体原料供給方法およびこの方法を実施するための装置
GB2221172A (en) Gravitational separator
GB1262381A (en) Improvements relating to apparatus for separating machining chips from workpieces
EP0492924B1 (fr) Procédé et dispositif pour la séparation des particules lourdes et légères de matières particulaires
SU988910A1 (ru) Устройство дл сепарации волокнистого материала при его транспортировании

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR CA CH CS DE DK ES FI GB HU JP KP KR LK LU MC MG MW NL NO PL RO SD SE SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU ML MR NL SE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 1991917644

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991917644

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1991917644

Country of ref document: EP