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EP0795359B1 - Séparateur pneumatique - Google Patents

Séparateur pneumatique Download PDF

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Publication number
EP0795359B1
EP0795359B1 EP97890007A EP97890007A EP0795359B1 EP 0795359 B1 EP0795359 B1 EP 0795359B1 EP 97890007 A EP97890007 A EP 97890007A EP 97890007 A EP97890007 A EP 97890007A EP 0795359 B1 EP0795359 B1 EP 0795359B1
Authority
EP
European Patent Office
Prior art keywords
air
separator
separator according
angle
adjustable
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.)
Expired - Lifetime
Application number
EP97890007A
Other languages
German (de)
English (en)
Other versions
EP0795359A3 (fr
EP0795359A2 (fr
Inventor
Manfred Dipl.-Ing. Lisberger
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.)
Scheuch GmbH
Original Assignee
Scheuch GmbH
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 Scheuch GmbH filed Critical Scheuch GmbH
Publication of EP0795359A2 publication Critical patent/EP0795359A2/fr
Publication of EP0795359A3 publication Critical patent/EP0795359A3/fr
Application granted granted Critical
Publication of EP0795359B1 publication Critical patent/EP0795359B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/04—Control 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
    • 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
    • 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 invention relates to a classifier for separating coarse material and contaminants in fiber processing in the course of the production of wood fiber boards after Preamble of claim 1.
  • MDF boards medium-density wood fiber boards
  • the shredded wood is wet glued, dried and then pressed into boards.
  • the glued, dried fibers contain a certain proportion of coarse material, e.g. Balls and lumps caused by gluing or moisture, and Impurities such as Metal or rubber particles.
  • This coarse fiber or foreign body interfere with the pressing into sheets and influence the homogeneity of the material.
  • the task of a classifier is to separate them from the material flow and thus the quality of MDF boards.
  • Sifters are generally wind sifters, the material to be sifted is placed in an air stream from the side or from above.
  • the fibers are made by one upward airflow detected, particles with a higher sink rate than that The speed of the air flow drops and is discharged via a lock. Particles with a lower sink rate leave the classifier due to the air flow carried. up. With some classifiers, the separation is caused by centrifugal forces supported.
  • the air with the fibers is fed into a cyclone by a fan Material separated from the air flow and then pressed. Most sifters will a large part of the air necessary for the sifting is sucked in directly below the sifter. Sometimes the air is heated and humidified to raise the temperature of the glued fibers increase. The amount of energy required for this is not insignificant.
  • the amount of exhaust air from the pneumatic conveyor system of the classifier can be reduced to a minimum, which only more a small volume of air needs to be dedusted.
  • the according to the amount of exhaust air necessary supply air is supplied outside of the classifier and can, except for a small amount System leakage can theoretically be reduced to zero.
  • the necessary The amount of energy used to heat the air can thus be significantly reduced.
  • the humidity of the If necessary, air can be regulated with the amount of exhaust air.
  • EP 0 491 278 A2 describes a device for dedusting and / or classifying granular or fibrous substances in one Airflow is known to help generate good sighting necessary vortex air flows through several air openings arranged one above the other flowed laterally into the classifier becomes.
  • this classifier is not a cycle the visual air possible because both through the entry opening next to the visible material, air is attracted as well the opening for discharging the coarse material air can enter, because this opening is not pressure-tight through a lock is.
  • the classifier includes a material feed opening, at least one opening for the sight wind, one opening for the removal of the total air and the sighted fiber material and a lock to discharge the coarse material, the Air is circulated back to the classifier via a cyclone becomes.
  • the inlet openings for the sight air are outside the viewing chamber with each other through a viewing wind distribution chamber connected, which is why it is essentially an air supply line acts, the flow through different openings in the separator wall is steerable.
  • a classifier of the type in question is known from US 4,465,194 A. known, wherein pieces of tobacco leaf from coarse materials Sight air that flows through two inflow openings arranged one above the other is poured into the classifier, be separated.
  • the Inlets for the classifying air are outside the classifying chamber connected to each other, which is why it is essentially is an air supply line whose flow is in two directions is separated.
  • For an optimal visual effect is also the laterally arranged material feed opening disadvantageous.
  • DE 580 680 deals with a separation device for separation of medium-fine and dust-like parts made of coal or the like, where part of the classifying air is branched off into a secondary pipe and laterally into the classifier above the main inflow opening is poured in. The sighting cannot be done by adjustment the volume shares of the two air flows are influenced. Also here is the material feed opening on the side of the Classifier
  • the object of the invention is the production of a classifier with energetic more favorable properties and improved visibility.
  • the object of the invention is achieved by the characterizing Part of claim 1 specified features.
  • the separation of air flows is essential.
  • the lower Airflow is used to hold the column of material in the classifier while the upper air flow or the upper air flows essentially the task of sighting, that is, the separation of the fine Fiber material from the coarse material, takes over or take over. Due to the adjustability of the volume fractions of the air flows optimal flow conditions achieved within the classifier regardless of the pressure conditions in the system.
  • the distribution of the air flows takes place with the help of regulators outside the classifier. Throttle installations that interfere with the sighting in the classifier itself are not needed.
  • the volume fraction of the upper air is advantageously 35% to 65%, preferably 50% and that of the lower air corresponding to 65% up to 35%, preferably 50% of the recycled classifying air.
  • the material is fed into the classifier by dosing devices above the material feed opening.
  • the cross section of the dosing elements is smaller than that of the material feed opening.
  • this problem is solved by a Corresponding arrangement of the opening rollers directly in the feed channel avoided.
  • the opening rollers extend over the entire Depth of the sifter, which according to the desired Material throughput is varied.
  • the opening rollers are in the feed channel arranged in ascending order.
  • the circulating visual air is in two air flows separated by two lines, the upper air line 2 and the lower air duct 3 through two superposed Inlet openings flow into the sifter 1 from the side.
  • the total air which contains the fiber material to be sifted, is connected via a line 4 at the top of the classifier 1 discharged next to the material feed opening 5.
  • the visual air will via fans 6 to a cyclone 7 for separating the fiber material guided. If necessary, the recirculated visual air in a mixer 8 supply air is supplied via a supply air line 10.
  • the Amount corresponds to the supply air supplied via the supply air line 10 in the direction of arrow 10a the set amount of the exhaust air line 9 in the direction of arrow 9a exhaust air discharged. Since the mixture with the recirculated air outside the classifier 1 takes place, a homogeneous air condition can be ensured within the classifier 1. With With the help of control flaps 11 in the upper air line 2 and the lower air line 3 Air volume ratio between upper air and lower air can be set.
  • Fig. 2 shows a section through the classifier 1 according to the invention
  • Material feed opening 5 in the direction of arrow 5a fed to the sifter 1 requires more material to be piled up on one side.
  • the fibers are captured by the opening rollers 12 arranged in increasing sequence.
  • the sense of rotation of everyone Opening rollers 12 are the same and in the direction of the ascending rollers, in the present case View counterclockwise accordingly.
  • Thereby a material transport is carried out achieved above and in the depth of the classifier 1 and the material sinks evenly into the Sifter 1.
  • the upper air reaches the sifter via a line 2 in the direction of arrow 2a 1. At the mouth of the upper air line 2, the particles from the air flow of the upper air captured and whirled upwards.
  • Optimal flow conditions are at an angle of inclination of the distribution pipes 14 against the vertical of preferably 30 °.
  • the under air flows over one Air duct 3 in the direction of arrow 3a in the classifier 1 and causes one Acceleration of the light particles upwards.
  • These light fibers are made by the Visual air carried for further processing via the total air line 4 in the direction of Arrow 4a transported.
  • Coarse material falls out through a lock 13.
  • One in Adjusting flap 18 arranged essentially in the center of the sifter 1 divides the viewing space into the feed cross-section and the exit cross-section.
  • Fig. 3 shows the adjustment options of the construction details of the classifier 1.
  • Die Distribution pipes 14 in the mouth of the upper air line 2 in the classifier 1 close with the Vertical an angle ⁇ , which is preferably 30 °.
  • ⁇ which is preferably 30 °.
  • At the inlet of the Wall opposite wall occurs with high material densities or Amounts of material to accumulate material that is no longer carried by the air flow become.
  • tear-off edge 15 on the rear wall of the classifier 1 Sliding the material away from the wall and a separation of the strands of material and this enables material transport of the light fibers upwards. Below the Tear-off edge 15 must have enough space to hold the material falling down decelerate and accelerate upwards again.
  • the angle ⁇ of the tear-off edge 15 can be changed to adapt to the material density and is in the range from 90 ° to 180 °, preferably between 120 ° and 130 °. For very light fibers, where the Setting the tear-off edge 15 is not necessary, the angle ⁇ is increased to 180 °. Due to the side air flowing in from the side, the necessary 90 ° Redirection to very irregular flow conditions. Through the use of Baffles 16, the flow is deflected evenly and with the adjustable Guides 17, the flow of the lower air is targeted against the direction of Strands of material led.
  • the amount of material is an adjustment flap 18 in the center of the classifier 1 with an adjustable one Angle ⁇ arranged with which the geometry of the viewing space can be changed and that abandoned material is separated from the viewed material.
  • the angle ⁇ of the adjusting flap 18 against the vertical is preferably in the range of ⁇ 20 °.
  • the rear wall 19 with the included adjustable parts the Exit cross section of the classifier 1 can be varied.
  • the Flow conditions can be optimized.
  • the rear wall 19 forms one with the vertical Angle ⁇ , which is preferably in the range between 0 ° and 20 °.

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)
  • Paper (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Lubricants (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Cyclones (AREA)

Claims (14)

  1. Séparateur à air pour séparer du matériau grossier et des impuretés à la préparation de fibres au cours de la fabrication de plaques de fibre de bois comprenant une ouverture d'amenée de matériau, au moins deux ouvertures d'entrée disposées l'une au-dessus de l'autre pour l'air de séparation, une ouverture pour l'évacuation de l'air de séparation et du matériau de fibre séparé et une écluse pour l'éclusage du matériau grossier, l'air de séparation étant guidé dans un circuit et l'air de séparation recyclé dans le circuit étant séparé en au moins deux courants d'air, caractérisé en ce que l'ouverture d'amenée de matériau (5) est disposée au-dessus du séparateur à air (1), et en ce que les courants d'air séparés s'écoulent par au moins deux conduites (2, 3) chacun par une ouverture d'entrée dans le séparateur à air (1), des clapets de réglage (11) ou similaires étant prévus dans chaque conduite (2, 3), de telle façon que les parts en volume des courants d'air soient réglables.
  2. Séparateur à air selon la revendication 1, caractérisé en ce que la part en volume de l'air supérieur atteint 35 à 65 %, de préférence 50 % et celle de l'air inférieur atteint de façon correspondante 65 à 35 %, de préférence 50 %.
  3. Séparateur à air selon la revendication 1 ou 2, caractérisé en ce que à l'extérieur du séparateur à air, est prévu un mélangeur (8) pour mélanger l'air recyclé avec une quantité, susceptible d'être librement choisie, d'air amené.
  4. Séparateur à air selon les revendications 1 à 3, caractérisé en ce que des cylindres à dents (12) sont disposés directement en dessous de l'ouverture d'amenée de matériau (5) dans le séparateur à air (1), selon une série montante.
  5. Séparateur à air selon la revendication 4, caractérisé en ce que les cylindres à dents (12) tournent dans le même sens de rotation dans la direction des cylindres montants.
  6. Séparateur à air selon les revendications 1 à 5, caractérisé en ce que dans l'ouverture d'injection d'écoulement de la conduite d'air supérieur (2) dans le séparateur à air (1), sont disposés des tubes de répartition (14) parallèles et horizontaux.
  7. Séparateur à air selon la revendication 6, caractérisé en ce que les tubes de répartition (14) sont disposés selon un angle d'inclinaison (β) par rapport à la verticale, de préférence de 30°.
  8. Séparateur à air selon les revendications 1 à 7, caractérisé en ce que la face opposée à l'air supérieur entrant (2) est réalisée comme une arête de décollage (15), à angle réglable (α).
  9. Séparateur à air selon la revendication 8, caractérisé en ce que l'angle (α) de l'arête de décollage (15) est situé dans la zone de 90° à 180°, de préférence entre 120° et 130°.
  10. Séparateur à air selon les revendications 1 à 9, caractérisé en ce que dans le séparateur à air (1) sont disposées des tôles de guidage (16) et des organes de guidage réglables (17) pour guider l'air inférieur d'écoulement d'admission.
  11. Séparateur à air selon les revendications 1 à 10, caractérisé en ce qu'un clapet de réglage (18) est disposé au centre du séparateur à air (1) selon un angle réglable (γ).
  12. Séparateur à air selon la revendication 11, caractérisé en ce que l'angle (γ) du clapet de réglage (18), par rapport à la verticale, est situé de préférence dans la zone de + 20°.
  13. Séparateur à air selon les revendications 1 à 12, caractérisé en ce que la paroi arrière (19) du séparateur à air (1) est disposée avec un angle réglable (δ).
  14. Séparateur à air selon la revendication 13, caractérisé en ce que la paroi arrière (19) forme un angle (δ) par rapport à la verticale, de préférence de 0° à 20°.
EP97890007A 1996-03-14 1997-01-15 Séparateur pneumatique Expired - Lifetime EP0795359B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT486/96 1996-03-14
AT48696 1996-03-14
AT0048696A AT403133B (de) 1996-03-14 1996-03-14 Sichter

Publications (3)

Publication Number Publication Date
EP0795359A2 EP0795359A2 (fr) 1997-09-17
EP0795359A3 EP0795359A3 (fr) 1998-03-11
EP0795359B1 true EP0795359B1 (fr) 2001-07-18

Family

ID=3491881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97890007A Expired - Lifetime EP0795359B1 (fr) 1996-03-14 1997-01-15 Séparateur pneumatique

Country Status (4)

Country Link
EP (1) EP0795359B1 (fr)
AT (2) AT403133B (fr)
DE (1) DE59704052D1 (fr)
ES (1) ES2161434T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900445A1 (fr) 2006-09-18 2008-03-19 LHS Clean Air Systems GmbH Dispositif destiné à séparer des matériaux gros et fins
DE102016117384A1 (de) 2016-09-15 2018-03-15 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102016117383A1 (de) 2016-09-15 2018-03-15 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102017110600A1 (de) 2017-05-16 2018-11-22 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6283300B1 (en) * 1998-08-21 2001-09-04 Joseph B. Bielagus Feed distribution for low velocity air density separation
DE10352119A1 (de) * 2003-11-04 2005-06-09 Focke & Co.(Gmbh & Co. Kg) Verfahren und Einrichtung zum Sichten von Tabak
DE102005052620A1 (de) * 2005-11-02 2007-05-03 Ottow, Manfred, Dr.-Ing. Klassierung von Holzspänen und Hackschnitzeln
DE102012108295A1 (de) * 2012-09-06 2014-05-15 Thyssenkrupp Resource Technologies Gmbh Vorrichtung und Verfahren zur Verarbeitung von Ersatzbrennstoffen
CN106892284B (zh) * 2017-04-11 2023-06-09 沅陵县辰州荞韵食品有限公司 粮食谷物筛分农机设备及其工作方法
CN115283254B (zh) * 2022-07-29 2023-08-25 中触媒新材料股份有限公司 一种用于制氧吸附剂颗粒气流快速筛分活化系统及方法

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DE583680C (de) * 1927-01-11 1933-09-07 Rudolf Lessing Verfahren und Vorrichtung zur Abtrennung der groeberen Bestandteile von den mittelfeinen und staubfoermigen Teilen aus Kohlen o. dgl. durch einen in einem Rohre aufsteigenden Gasstrom
DE2313614C3 (de) * 1973-03-19 1978-07-13 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Vorrichtung zum Abtrennen von Grit aus einem feindisperse Feststoffe enthaltenden, zur pneumatischen Förderung dieser Stoffe dienenden Gasstrom
US3883423A (en) * 1973-08-01 1975-05-13 Aerofall Mills Ltd Vertical classifier
IT1124576B (it) * 1978-10-26 1986-05-07 Hartmann Wibau Maschf Disposizione e conformazione di un setaccio in un impianto in convogliamento ad aria di aspirazione funzionante sostanzalmente ad una pressione compresa fra 0,6 e 0,8
DE3131836C2 (de) * 1981-08-12 1985-12-05 Günter 4300 Essen Lübke Vorrichtung zur Entstaubung und/oder Klassierung von Stoffen im Luftstrom
DD203237A1 (de) * 1982-02-08 1983-10-19 Dietmar Kummer Vorrichtung und verfahren zum entstauben von schuettguetern, insbesondere granulaten aus synthetischen hochpolymeren
US4465194A (en) * 1982-12-23 1984-08-14 Universal Leaf Tobacco Co. Threshed tobacco lead separator
DE3409814A1 (de) * 1984-03-16 1985-09-19 Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg Gegenstromsichter
DE3878072D1 (de) * 1987-07-29 1993-03-18 Bat Cigarettenfab Gmbh Abscheider zur trennung von tabak-teilchen aus einem tabak/gas-gemisch.
SE467044B (sv) * 1990-09-28 1992-05-18 Flaekt Ab Saett och anordning foer avskiljning av tyngre partiklar fraan ett partikelformigt material
DE4040561C2 (de) * 1990-12-19 1995-10-05 Luebke Gmbh Vorrichtung zum Entstauben und/oder Klassieren von Sichtgut in einem Luftstrom
DE4112556C1 (en) * 1991-04-17 1992-06-17 G. Siempelkamp Gmbh & Co, 4150 Krefeld, De Spreading installation for chips, fibres etc. - has wind sifter for spreading flow coupled to spread material outlet shaft

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900445A1 (fr) 2006-09-18 2008-03-19 LHS Clean Air Systems GmbH Dispositif destiné à séparer des matériaux gros et fins
DE102016117384A1 (de) 2016-09-15 2018-03-15 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102016117383A1 (de) 2016-09-15 2018-03-15 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102016117384B4 (de) 2016-09-15 2023-08-10 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102016117383B4 (de) 2016-09-15 2023-09-21 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102017110600A1 (de) 2017-05-16 2018-11-22 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
DE102017110600B4 (de) 2017-05-16 2023-09-07 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter

Also Published As

Publication number Publication date
ES2161434T3 (es) 2001-12-01
ATA48696A (de) 1997-04-15
EP0795359A3 (fr) 1998-03-11
AT403133B (de) 1997-11-25
ATE203191T1 (de) 2001-08-15
EP0795359A2 (fr) 1997-09-17
DE59704052D1 (de) 2001-08-23

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