EP0795359A2 - Séparateur pneumatique - Google Patents

Séparateur pneumatique Download PDF

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Publication number
EP0795359A2
EP0795359A2 EP97890007A EP97890007A EP0795359A2 EP 0795359 A2 EP0795359 A2 EP 0795359A2 EP 97890007 A EP97890007 A EP 97890007A EP 97890007 A EP97890007 A EP 97890007A EP 0795359 A2 EP0795359 A2 EP 0795359A2
Authority
EP
European Patent Office
Prior art keywords
air
sifter
classifier
angle
opening
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.)
Granted
Application number
EP97890007A
Other languages
German (de)
English (en)
Other versions
EP0795359A3 (fr
EP0795359B1 (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 ALOIS GmbH
Alois Sceuch 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 ALOIS GmbH, Alois Sceuch GmbH filed Critical SCHEUCH ALOIS 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 impurities in fiber processing in the course of the production of wood fiber boards according to the preamble of patent claim 1.
  • MDF boards medium-density wood fiber boards
  • the shredded wood is wet glued, dried and then pressed into boards.
  • a certain proportion of coarse material e.g. Hanks and lumps. caused by gluing or moisture, as well as contamination. such as. Metal or rubber particles.
  • These coarse fibers or foreign bodies interfere with the pressing into sheets and influence the homogeneity of the material. It is the task of a classifier to separate them from the material flow and thus improve the quality of MDF boards.
  • the sifters used in the manufacture of wood fiber boards are generally wind sifters, the material to be sifted being fed into an air stream from the side or from above. The fibers are caught by an upward air flow.
  • Particles with a higher sink rate than the speed of the air flow fall down and are discharged via a lock. Particles with a lower sink rate leave the classifier, carried by the air flow. up. With some classifiers, the separation is supported by centrifugal forces. The air with the fibers is fed into a cyclone by a fan, the material is separated from the air flow and then compressed. With most classifiers, a large part of the air required for classifying is drawn in directly below the classifier. Sometimes the air is heated and humidified to raise the temperature of the glued fibers. The amount of energy required for this is not insignificant.
  • the amount of exhaust air from the pneumatic conveying system of the classifier can be reduced to a minimum, as a result of which only a small volume of air has to be dedusted.
  • the supply air required according to the amount of exhaust air is supplied outside the classifier and can theoretically be reduced to zero except for a slight leak in the system. The amount of energy required to heat the air can thus be significantly reduced. If necessary, the humidity of the air can be regulated with the amount of exhaust air.
  • DE 41 12 556 C1 describes a system for spreading the spreading material in the course of the production of fiberboard, chipboard, gypsum board reinforced with chips and / or fibers.
  • a device for windsifting the flow of grit is connected.
  • the sifter contains a material feed opening, at least one opening for the sight wind, an opening for removing all the air and the sifted fiber material and a lock for discharging the coarse material, the air being returned to the sifter in a circuit via a cyclone.
  • the inlet openings for the classifying air are connected to each other outside the classifying chamber by a classifying wind distribution chamber, which is why it is essentially an air supply line, the flow of which can be directed through various openings in the separating wall of the classifier.
  • the object of the invention is the production of a classifier with energetically more favorable properties and improved visibility.
  • the object of the invention is achieved by the features specified in the characterizing part of claim 1.
  • the separation of the air flows is essential for the visual effect.
  • the lower air flow serves to hold the material column in the classifier, while the upper air flow or the upper air flows essentially takes on the task of classifying, that is to say the separation of the fine fiber material from the coarse material.
  • the volume fractions of the air streams are adjustable, optimal flow conditions can be 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 in the classifier itself, which are annoying during the classifying, are not required.
  • the recirculated sight air is separated into upper air and lower air, and flows into the classifier via two lines through two inflow openings.
  • the volume fraction of the upper air is 35% to 65%, preferably 50% and that of the lower air correspondingly 65% to 35%, preferably 50% of the recirculated visual 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 avoided by an appropriate arrangement of the opening rollers directly in the feed channel.
  • the opening rollers extend over the entire depth of the classifier, which is varied in accordance with the desired material throughput.
  • the opening rollers are arranged in increasing order in the feed channel. By correspondingly rotating all opening rollers in the direction of the rising rollers, material is transported upwards and at the same time is distributed over the depth of the classifier. After passing through the spaces between the opening rollers, the fibers sink with an even distribution into the classifier.
  • the circulating classifying air is separated into two air streams, which flow laterally into the classifier 1 via two lines, the upper air line 2 and the lower air line 3 through two stacked inlet openings.
  • the total air, which contains the fiber material to be sifted, is discharged via a line 4 on the top of the sifter 1 next to the material feed opening 5.
  • the classifying air is led via fans 6 to a cyclone 7 for the separation of the fiber material. If necessary, the recirculated visual air in a mixer 8 supply air is supplied via a supply air line 10.
  • the amount of the supply air supplied in the direction of arrow 10a via the supply air line 10 corresponds to the set amount of the exhaust air discharged via the exhaust air line 9 in the direction of arrow 9a. Since the mixture with the recycled classifying air takes place outside the classifier 1, a homogeneous air condition can be ensured within the classifier 1. With the help of control flaps 11 in the upper air line 2 and the lower air line 3, the air quantity ratio between upper air and lower air can be adjusted.
  • FIG. 2 shows a section through the classifier 1 according to the invention.
  • the material is fed to the classifier 1 via the material feed opening 5 in the direction of arrow 5a, with more material being accumulated on one side due to the material task.
  • the fibers are caught by the opening rollers 12 arranged in increasing sequence.
  • the direction of rotation of all opening rollers 12 is the same and in the direction of the ascending rollers, in the present view correspondingly counterclockwise.
  • material is transported upwards and into the depth of the sifter 1 and the material sinks evenly distributed into the sifter 1.
  • the upper air reaches the sifter 1 via a line 2 in the direction of the arrow 2a Particles are caught by the air flow in the upper air and whirled upwards.
  • the distribution pipes 14 in the mouth of the upper air line 2 in the classifier 1 form an angle ⁇ with the vertical, which is preferably 30 °.
  • material accumulations occur on the wall opposite the inflow opening of the upper air, which are no longer carried by the air flow.
  • tear-off edge 15 on the rear wall of the classifier 1
  • the material slides away from the wall and a separation of the strands of material and thereby allows the light fibers to be transported upwards. There must be enough space below the tear-off edge 15 in order to decelerate the material falling down and to accelerate it up 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 °. In the case of very light fibers, in which the setting of the tear-off edge 15 is not necessary, the angle ⁇ is increased to 180 °. Due to the incoming air flowing in from the side, very irregular flow conditions occur due to the necessary 90 ° deflection. By using baffles 16, the flow is deflected evenly and with the adjustable baffles 17, the flow of the lower air is directed against the direction of material strands.
  • an adjustment flap 18 is arranged in the center of the classifier 1 with an adjustable angle ⁇ , with which the geometry of the classifying space can be changed and the material fed in is separated from the classed material.
  • the angle ⁇ of the adjusting flap 18 against the vertical is preferably in the range of ⁇ 20 °.
  • the outlet cross section of the classifier 1 can be varied. This allows the flow conditions to be optimized depending on the material.
  • the rear wall 19 forms an angle ⁇ with the vertical, 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)
  • Cyclones (AREA)
  • Lubricants (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Paper (AREA)
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 true EP0795359A2 (fr) 1997-09-17
EP0795359A3 EP0795359A3 (fr) 1998-03-11
EP0795359B1 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 (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982082A1 (fr) * 1998-08-21 2000-03-01 Beloit Technologies, Inc. Procédé de séparation d' un mélange de particules
DE10352119A1 (de) * 2003-11-04 2005-06-09 Focke & Co.(Gmbh & Co. Kg) Verfahren und Einrichtung zum Sichten von Tabak
EP1782893A3 (fr) * 2005-11-02 2008-07-16 Manfred Dr. Ottow Triage de copeaux de bois
WO2014037237A1 (fr) * 2012-09-06 2014-03-13 Thyssenkrupp Resource Technologies Gmbh Dispositif et procédé de traitement de combustibles de substitution
CN106892284A (zh) * 2017-04-11 2017-06-27 苏州尚梵斯科技有限公司 粮食谷物筛分农机设备及其工作方法
CN107824450A (zh) * 2016-09-15 2018-03-23 辛北尔康普机器及成套设备有限责任公司 筛分机
CN107824449A (zh) * 2016-09-15 2018-03-23 辛北尔康普机械设备制造有限责任公司 筛分机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006014455U1 (de) 2006-09-18 2006-11-16 Lhs Clean Air Systems Gmbh Vorrichtung zum Trennen von Grob- und Feinmaterial
DE102017110600B4 (de) 2017-05-16 2023-09-07 Siempelkamp Maschinen- Und Anlagenbau Gmbh Sichter
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491278A2 (fr) 1990-12-19 1992-06-24 Holger Lübke Procédé et dispositif pour le dépoussiérage et/ou le tri de matières granuleuses ou fibreuses dans un courant d'air

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491278A2 (fr) 1990-12-19 1992-06-24 Holger Lübke Procédé et dispositif pour le dépoussiérage et/ou le tri de matières granuleuses ou fibreuses dans un courant d'air

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982082A1 (fr) * 1998-08-21 2000-03-01 Beloit Technologies, Inc. Procédé de séparation d' un mélange de particules
DE10352119A1 (de) * 2003-11-04 2005-06-09 Focke & Co.(Gmbh & Co. Kg) Verfahren und Einrichtung zum Sichten von Tabak
EP1782893A3 (fr) * 2005-11-02 2008-07-16 Manfred Dr. Ottow Triage de copeaux de bois
WO2014037237A1 (fr) * 2012-09-06 2014-03-13 Thyssenkrupp Resource Technologies Gmbh Dispositif et procédé de traitement de combustibles de substitution
CN107824450A (zh) * 2016-09-15 2018-03-23 辛北尔康普机器及成套设备有限责任公司 筛分机
CN107824449A (zh) * 2016-09-15 2018-03-23 辛北尔康普机械设备制造有限责任公司 筛分机
US10195646B2 (en) 2016-09-15 2019-02-05 Siempelkamp Masclinen-Und Anlagenbau Gmbh Sifter
CN106892284A (zh) * 2017-04-11 2017-06-27 苏州尚梵斯科技有限公司 粮食谷物筛分农机设备及其工作方法
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

Also Published As

Publication number Publication date
EP0795359A3 (fr) 1998-03-11
EP0795359B1 (fr) 2001-07-18
ATA48696A (de) 1997-04-15
ATE203191T1 (de) 2001-08-15
DE59704052D1 (de) 2001-08-23
ES2161434T3 (es) 2001-12-01
AT403133B (de) 1997-11-25

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