EP0546442B1 - Device for separating a mixture of materials with different specific gravity - Google Patents

Device for separating a mixture of materials with different specific gravity Download PDF

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Publication number
EP0546442B1
EP0546442B1 EP92120598A EP92120598A EP0546442B1 EP 0546442 B1 EP0546442 B1 EP 0546442B1 EP 92120598 A EP92120598 A EP 92120598A EP 92120598 A EP92120598 A EP 92120598A EP 0546442 B1 EP0546442 B1 EP 0546442B1
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EP
European Patent Office
Prior art keywords
screening
air
drum
materials
mixture
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Expired - Lifetime
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EP92120598A
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German (de)
French (fr)
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EP0546442A3 (en
EP0546442A2 (en
Inventor
Hans Schmitt
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WESTERIA FOERDERTECHNIK GMBH
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Westeria Foerdertechnik Schmitt Hans GmbH
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Priority to DE9218369U priority Critical patent/DE9218369U1/en
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    • 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
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
    • B07B13/11—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge 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
    • B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material

Definitions

  • the invention relates to a device for separating a material mixture.
  • Soviet publication 1313530 shows a device for separating materials of different grain sizes.
  • the material is fed directly onto a rotating drum via the vibrating trough. There is a greater distance between the discharge end of the vibrating trough and the surface of the drum.
  • An air nozzle is arranged above the drum, the air flow of which is directed past the drum downwards just below the discharge end of the vibrating channel.
  • the air flow changes the material with the smaller grain in its trajectory so that it is separated from the material with the larger grain in the falling phase before touching the drum. This separation takes place in free fall before touching the drum, but the actual separation process, just as in EP 03 03 034, already takes place before the sieve drum solely by the air flow.
  • DE-PS 2837037 Another device is described in DE-PS 2837037.
  • This device has a feed device for feeding a material mixture of materials with different specific weights to a rotatingly driven viewing device.
  • This viewing device is designed as a viewing drum.
  • the material to be sorted is fed into the interior of the viewing drum.
  • the axis of rotation of this viewing drum points in the longitudinal and feed directions of the feed device.
  • the various materials of the material mixture are to be separated from each other inside the viewing drum, which is positioned at an angle.
  • Such devices are mainly used for waste and waste sorting.
  • the invention has for its object to simplify the construction of the devices described in the introduction and at the same time to create a device for separating a material mixture with high selectivity and a high degree of purity which is not susceptible to malfunction and free of clogging.
  • the viewing device brakes the material that is fed directly from the feeding device onto the viewing device at a slower speed.
  • a first separation process takes place.
  • the air flow supports this separation in the second phase of the separation process, if, as described above, the lighter parts are pressed against the outer wall of the sighting device.
  • the viewing device brakes the material mixture applied directly to it by the feed device and the heavy parts are thereby subjected to a reversal of movement which has an extremely advantageous effect on the separation quality.
  • the lighter parts adhering and in the slipstream of the heavier parts become detached and are caught and taken away by the air flow from the air blowing device.
  • the air nozzle has a width which corresponds approximately to the width of the viewing device.
  • a plurality of air nozzles can also be arranged side by side and / or one above the other.
  • the height, angle and / or distance of the air-blowing device can be adjusted to the sighting device.
  • the adjustable assignment of feeding device and viewing device enables individual adaptation to the prevailing viewing and sorting conditions.
  • the distance between the discharge end of the feed device and the classifying device should be 1.5 to 5 times, preferably 2-3 times the largest average diameter of the chunks of the material mixture in order to achieve an optimal result. I.e. for example, with a maximum average chunk diameter of a material mixture of 30 mm, a distance of approximately 60-90 mm.
  • the sighting device or the conveyor belt In order to be able to achieve a sufficiently good separation result in the case of materials which are difficult to separate, it can be useful for the sighting device or the conveyor belt to have lugs such as knobs, wire pins etc. on its outside.
  • the device has the feed device designed as a vibrating conveyor 1 and the viewing device designed as a viewing drum 2.
  • the vibratory conveyor 1 is arranged on the frame 3 and is driven by the vibratory drive 4.
  • the feed conveyor belt 5 is arranged in front of the vibratory conveyor 1.
  • Seen in the conveying direction 6, the viewing drum 2 is rotatably arranged behind the vibrating conveyor 1.
  • the viewing drum 2 has a closed outer jacket 7 and is driven by a drive motor, not shown, rotating in the direction of the arrow 8.
  • the upper point 9 of the viewing drum 2 is located lower than the discharge end 10 of the vibrating conveyor 1 in the exemplary embodiment shown of the vibratory conveyor 1 is arranged.
  • the conveyor belt 12 is arranged below the viewing drum on the front side of the viewing drum 2 and the conveyor belt 13 on the rear side.
  • the air injection device 15 with the air nozzle 16 is arranged in the transition region 14 between the vibratory conveyor 1 and the viewing drum 2.
  • the air injection device 15 is connected via a hose, not shown, to a blower, also not shown.
  • the air nozzle 16 has a width which corresponds approximately to the width of the viewing drum 2 as shown in FIG. 2.
  • a plurality of air nozzles can also be arranged side by side and one above the other.
  • the air nozzle 16 is adjustable in its height, its angle and its distance from the viewing drum 2.
  • the air stream emerging from the air nozzle 16, as indicated by the arrow 17, is directed approximately tangentially to the upper half of the side of the viewing drum 2 facing the vibrating conveyor 1.
  • the viewing drum 2 can be driven via its drive motor at different speeds and optionally in both possible directions of rotation, the viewing drum 2 being driven in the direction of arrow 8 in the exemplary embodiment. Furthermore, the viewing drum 2 is arranged on the frame 18 so as to be adjustable and adjustable in the vertical direction, so that the upper point 9 (apex) can be set lower, at the same height or higher than the delivery point 10 of the vibratory conveyor 1.
  • the viewing drum 2 can be set in a manner not shown at different distances from the discharge end 10 of the vibratory conveyor 1.
  • the conveyor belts 12 and 13 can also be adjusted to the viewing drum 2 in a manner not shown.
  • the amount of air emerging from the air nozzle 16 and the speed at which the air exits the air nozzle 16 can be adjusted via a regulating device (not shown).
  • the functioning of the separating device according to FIG. 1 is as follows:
  • the material mixture to be sorted and separated from materials with different specific weights (such as stone rubble, foils, styrofoam, paper, wood, etc.) is, for example, from a storage bunker by means of the conveyor belt 5, as indicated by arrow 19, onto the vibratory conveyor 1 given up.
  • the vibratory conveyor 1 further promotes the material mixture in a comparatively manner in the direction of arrow 6.
  • the various material parts of the material mixture are directed against the upper half of the side of the outer jacket 7 of the viewing drum 2 rotating in the direction of the arrow 8 facing the vibratory conveyor 1.
  • the viewing drum 2 rotates at a low peripheral speed, adapted to the speed of the material flow.
  • the heavy material parts of the material mixture collide against the outer casing 7 of the viewing drum 2 and are braked by the viewing drum 2 and thrown back into the air flow by the viewing drum 2 due to the impact energy.
  • adhering and in the slipstream light parts detach from the heavier parts thrown back, so that these light parts are caught by the air stream 17 and torn away.
  • the heavy parts then fall down on the conveyor belt 12.
  • the conveyor belt 12 conveys these separated "heavy" material parts to another container or storage location. Parts adhering to the outer jacket 7 are scraped off the outer jacket by the stripper 21.
  • FIG. 3 shows a further possibility of assigning a feed device designed as an oscillating conveyor 1 'and a viewing device designed as a viewing drum 2'.
  • the viewing drum 2 ' is set with its axis of rotation 11 at an angle alpha to the conveying direction 6' of the vibratory conveyor 1 '.
  • the discharge end 10 'of the vibratory conveyor 1' viewed in plan view, runs approximately parallel to the axis of rotation 11 'of the viewing drum 2'.
  • the sight drum 30, according to FIG. 4, can be used instead of the sight drum 2 in the separating device shown in FIG. 1 in difficult sight and separation conditions.
  • the viewing drum 30 has on the outside of its outer jacket 31 the knobs or transverse projections 32 distributed over its circumference and its width. As a result, the separating effect of the viewing drum 30 is considerably improved, especially when sorting and viewing material parts of a similar shape.
  • FIG. 5 shows that instead of a single viewing drum, as in FIG. 1, a plurality of viewing drums 33 can be arranged one behind the other, viewed in the viewing direction 34.
  • the downstream viewing drum 33 seen in the viewing direction 34 is arranged lower than the previous one.
  • An air blowing device designed as an air nozzle 35 is assigned to each viewing drum 33.
  • the viewing drums 33 can be adjusted and adjusted in their distances (heights (A) and / or subsequent distance (B)) from one another; i.e. these distances are variable according to the requirements.
  • the axes of rotation 36 of the viewing drum 33 can be arranged on a straight or curved (convex or concave) line. It is also possible to arrange viewing drums 33 with different outer diameters one behind the other.
  • FIG. 6 shows the use of a conveyor belt 37 instead of the viewing drum 2 shown in FIG. 1.
  • the conveyor belt 37 is positioned obliquely upwards and is guided in an arcuate manner on its visible side 38. As indicated by arrow 20, the "lighter” material is directed onto the conveyor belt 13, while the “heavier” material falls onto the conveyor belt 12.
  • the separation process of the material mixture according to the systems according to FIG. 6 corresponds to the separation process as described for the system according to FIG. 1.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

Device for separating a mixture of materials with different specific gravities, which device has a feeding device (1, 5) for feeding a mixture of materials to a driven screening device (2, 22, 32, 33, 35), which is arranged so that its axis of rotation (11) is transverse to the conveying direction (6) of the feeding device (1, 5), it being possible to feed the mixture of materials to the outside of the screening device (2, 22, 32, 33, 35) and an air blowing device (15, 16) being arranged in the region of transition (14) between the feeding device (1, 5) and the screening device. In order to produce a device for separating a mixture of materials which is not prone to malfunctions and blockages and separates with a high degree of precision and purity, provision is made for the screening device (2) to be arranged with its axis of rotation (11) transverse to the conveying direction (6) of the feeding device (1), for an air blowing device (15, 16) to be arranged in the region of transition between the feeding device (1) and the screening device (2) and for the mixture of materials to be fed to the outside of the screening device (2). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Trennen einer Materialmischung.The invention relates to a device for separating a material mixture.

In der nicht vorveröffentlichten DE-OS 41 25 236 ist eine Vorrichtung zum Trennen einer Materialmischung beschrieben. Bei dieser Vorrichtung wird die zu trennende Materialmischung gegen eine einstellbare Prallplatte geschleudert. Von dieser feststehenden Prallplatte prallen die Materialien in Abhängigkeit ihrer Festigkeit unterschiedlich stark ab, so daß es zur Trennung des ursprünglichen Materials in zumindest zwei getrennte Teilströme kommt. Diese beiden getrennten Teilströme fallen dann in einen etwa horizontal ausgerichteten Luftstrom. Hierdurch erfolgt eine noch weitere räumliche Trennung der Teilströme von Material, bevor dieses in einer dritten Phase auf eine bewegte, geneigte Fläche fällt. Der Luftstrom befindet sich in einem größerem Abstand zu der geneigten Fläche. Aufgrund der relativ hohen Bewegungsgeschwindigkeit mit der die Materialien von der Prallplatte abprallen und durch den Luftstrom fallen, ergibt sich eine sehr geringe Verweildauer im Luftstrom. Hieraus ergibt sich eine unzureichende Trennschärfe, trotz der Auffächerung des Materialstromes durch das vorhergehende Schleudern gegen die feststehende Prallplatte.In the unpublished DE-OS 41 25 236 a device for separating a material mixture is described. In this device, the material mixture to be separated is thrown against an adjustable baffle plate. Depending on their strength, the materials bounce off this fixed baffle plate to different extents, so that the original material is separated into at least two separate partial streams. These two separate partial flows then fall into an approximately horizontally oriented air flow. This results in a further spatial separation of the partial flows of material before it falls on a moving, inclined surface in a third phase. The airflow is at a greater distance from the inclined surface. Due to the relatively high movement speed with which the materials bounce off the baffle plate and fall through the air flow, there is a very short dwell time in the air flow. This results in an insufficient selectivity, despite the fanning out of the material flow due to the previous centrifugation against the fixed baffle plate.

In der EP-03 03 034 B1 ist eine weitere Vorrichtung zum Trennen einer Materialmischung beschrieben. Die Materialmischung wird bei dieser Vorrichtung durch die Bandförderer einer ständig mit Luft beaufschlagten Siebtrommel zugeführt. Hierbei fällt die Materialmischung in Pfeilrichtung nach unten in den Fallschacht. Auf der einen Seite des Fallschachtes befindet sich die einen Luftstrom durchlassende Siebwand, während sich auf der anderen Seite des Fallschachtes die Siebtrommel befindet. Durch den durch die Siebwand hindurchtretenden Querluftstrom wird das leichtere Material gegen die Siebtrommel geblasen und von dem sich im Innern der Siebtrommel befindlichen Unterdruck angesogen und von diesem festgehalten. Der Trennvorgang findet ausschließlich durch das ansaugende Festhalten der Leichtteile an der Trommel statt. Hier wird das leichtere Material ausschließlich von dem Luftstrom gegen die Siebtrommel geblasen und dann dort angesogen. Das schwerere Material kommt nicht mit der Siebtrommel in Berührung. Der Druckluftstrom der Luftblaseinrichtung ist in vollem Umfange gegen den seitlichen Bereich der Siebtrommel gerichtet.Another device for separating a material mixture is described in EP-03 03 034 B1. In this device, the material mixture is fed by the belt conveyors to a sieve drum that is constantly pressurized with air. The material mixture falls down into the chute in the direction of the arrow. On one side of the chute there is a screen wall that allows an air flow, while on the other side of the chute there is a screen drum. The lighter material is blown against the sieve drum by the cross-air flow passing through the sieve wall and sucked in by the vacuum inside the sieve drum and held by it. The separation process takes place exclusively by suction-holding the light parts to the drum. Here the lighter material is only blown against the sieve drum by the air flow and then sucked in there. The heavier material does not come into contact with the sieve drum. The compressed air flow of the air blowing device is against the side of the screen drum.

Die sowjetische Druckschrift 1313530 zeigt eine Vorrichtung zum Separieren von Materialien unterschiedlicher Körnung. Über die Schwingrinne wird das Material direkt auf eine rotierende Trommel aufgegeben. Zwischen dem Ablaufende der Schwingrinne und der Oberfläche der Trommel ist ein größerer Abstand vorhanden. Oberhalb der Trommel ist eine Luftdüse angeordnet, deren Luftströmung knapp unterhalb dem Ablaufende der Schwingrinne nach unten an der Trommel vorbei gerichtet ist. Durch den Luftstrom wird das Material mit der kleineren Körnung in seiner Flugbahn so verändert, daß es von dem Material mit der größeren Körnung in der Fallphase, vor Berühren der Trommel getrennt wird. Diese Trennung erfolgt im freien Fall vor dem Berühren der Trommel, wobei jedoch der eigentliche Trennvorgang genau wie bei der EP 03 03 034 bereits vor der Siebtrommel allein durch den Luftstrom erfolgt.Soviet publication 1313530 shows a device for separating materials of different grain sizes. The material is fed directly onto a rotating drum via the vibrating trough. There is a greater distance between the discharge end of the vibrating trough and the surface of the drum. An air nozzle is arranged above the drum, the air flow of which is directed past the drum downwards just below the discharge end of the vibrating channel. The air flow changes the material with the smaller grain in its trajectory so that it is separated from the material with the larger grain in the falling phase before touching the drum. This separation takes place in free fall before touching the drum, but the actual separation process, just as in EP 03 03 034, already takes place before the sieve drum solely by the air flow.

Eine weitere Vorrichtung ist in der DE-PS 2837037 beschrieben. Diese Vorrichtung weist eine Zuführvorrichtung zum Zuführen einer Materialmischung aus Materialien mit unterschiedlichem spezifischen Gewicht zu einer rotierend angetriebenen Sichteinrichtung auf. Diese Sichteinrichtung ist als Sichttrommel ausgebildet. Bei dieser bekannten Vorrichtung wird das zu sortierende Material in das Innere der Sichttrommel aufgegeben. Die Drehachse dieser Sichttrommel weist in Längs- und Zuführrichtung der Zuführvorrichtung. Im Inneren der schräg nach oben angestellten Sichttrommel sollen mit Unterstützung eines Luftstromes die verschiedenen Materialien der Materialmischung voneinander getrennt werden. Derartige Vorrichtungen werden vor allem zur Müll- und Abfallsortierung eingesetzt.Another device is described in DE-PS 2837037. This device has a feed device for feeding a material mixture of materials with different specific weights to a rotatingly driven viewing device. This viewing device is designed as a viewing drum. In this known device, the material to be sorted is fed into the interior of the viewing drum. The axis of rotation of this viewing drum points in the longitudinal and feed directions of the feed device. With the help of an air flow, the various materials of the material mixture are to be separated from each other inside the viewing drum, which is positioned at an angle. Such devices are mainly used for waste and waste sorting.

Diese bekannte Vorrichtung verstopft trotz der vorgeschlagenen Einstellmöglichkeiten, insbesondere wenn die Zusammensetzung der Materialmischung sehr stark schwankt, besonders wenn die Anteile von leichtem zu schwerem spezifischen Gewicht sich ständig ändern. Weiterhin läßt die Sortierqualität zu wünschen übrig.This known device clogs despite the proposed adjustment options, especially when the composition of the material mixture fluctuates very much, especially when the proportions of light to heavy specific weight are constantly changing. Furthermore, the sorting quality leaves something to be desired.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs beschriebenen Vorrichtungen in ihrem Aufbau wesentlich zu vereinfachen und gleichzeitig eine störungsunanfällig und verstopfungsfrei arbeitende Vorrichtung zum Trennen einer Materialmischung mit hoher Trennschärfe und hohem Reinheitsgrad zu schaffen.The invention has for its object to simplify the construction of the devices described in the introduction and at the same time to create a device for separating a material mixture with high selectivity and a high degree of purity which is not susceptible to malfunction and free of clogging.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Infolge dieser Maßnahmen wird eine einfache Vorrichtung zum Trennen einer Materialmischung erhalten, die in überraschender Weise eine äußerst gute Trennung von Materialien unterschiedlichem spezifischen Gewichts gewährleistet. Darüberhinaus arbeitet sie störunanfällig und verstopfungsfrei.This object is achieved by the features of claim 1. As a result of these measures, a simple device for separating a material mixture is obtained, which surprisingly ensures extremely good separation of materials of different specific weights. In addition, it works unaffected by interference and free of clogging.

Die Verstopfungsfreiheit der Vorrichtung wird durch das unmittelbare Aufgeben der Materialien der Materialmischung von der Zuführeinrichtung auf die Außenseite der Sichteinrichtung sowie den Quereinbau der Drehachse der Sichteinrichtung zur Förderrichtung des Materials gewährleistet. Wobei sich bei ersten Versuchen in überraschender Weise gezeigt hat, daß diese Aufgabeweise des Materials in Verbindung mit einer Luftblaseinrichtung, deren Luftstrom zumindest teilweise gegen die Außenseite der Sichteinrichtung gerichtet ist, zu sehr guten Trennergebnissen führt. Durch die aus der Luftblaseinrichtung austretende Luft werden die leichteren Materialien, wie beispielsweise Papier, Styropor, Pappe, Holzstücke, Folien etc., gegen die Sichteinrichtung gedrückt, so daß die Reibungskraft zwischen der Sichteinrichtung und diesem Material erhöht wird. Somit werden diese Materialien von der angetriebenen Sichteinrichtung mitgerissen, während die schweren Materialien der Materialmischung aufgrund ihrer Gewichtskraft in die andere Richtung abgeschieden werden.The freedom from blockage of the device is ensured by the direct application of the materials of the material mixture from the feed device to the outside of the classifying device and the transverse installation of the axis of rotation of the classifying device to the conveying direction of the material. Surprisingly, it has been shown in the first attempts that this method of feeding the material in connection with an air blowing device, the air flow of which is at least partially directed against the outside of the viewing device, leads to very good separation results. The lighter materials, such as paper, styrofoam, cardboard, pieces of wood, foils etc., are pressed against the classifying device by the air emerging from the air blowing device, so that the frictional force between the classifying device and this material is increased. These materials are thus entrained by the driven classifying device, while the heavy materials of the material mixture are separated in the other direction due to their weight.

Durch die Sichteinrichtung wird das von der Zuführeinrichtung unmittelbar auf die Sichteinrichtung mit geringerer Geschwindigkeit aufgegebene Material abgebremst. Bei dessem ersten Durchlauf durch den Luftstrom der Luftblaseinrichtung findet ein erster Trennvorgang statt. Der Luftstrom unterstützt diese Trennung in der zweiten Phase des Trennvorgangs, wenn, wie vor beschrieben, die leichteren Teile gegen die Außenwand der Sichteinrichtung gedrückt werden. Durch die Sichteinrichtung wird die von der Zuführeinrichtung unmittelbar auf ihr aufgegebene Materialmischung gebremst und die schweren Teile erfahren hierdurch eine sich auf die Trennqualität äußerst vorteilhaft auswirkende Bewegungsumkehr. Hierdurch lösen sich die anhaftenden und im Windschatten der schwereren Teile sich befindenden leichteren Teile und werden vom Luftstrom der Lufteinblaseinrichtung erfaßt und mitgenommen. Somit ergibt sich durch die einfache Anordnung der Sichteinrichtung und der Aufgabe der Materialmischung auf die Außenseite der Sichteinrichtung eine bisher noch nicht annähernd erzielte Trennschärfe der Materialmischung.The viewing device brakes the material that is fed directly from the feeding device onto the viewing device at a slower speed. During its first pass through the air flow of the air blowing device, a first separation process takes place. The air flow supports this separation in the second phase of the separation process, if, as described above, the lighter parts are pressed against the outer wall of the sighting device. The viewing device brakes the material mixture applied directly to it by the feed device and the heavy parts are thereby subjected to a reversal of movement which has an extremely advantageous effect on the separation quality. As a result, the lighter parts adhering and in the slipstream of the heavier parts become detached and are caught and taken away by the air flow from the air blowing device. Thus, the simple arrangement of the classifying device and the task of mixing the material on the outside of the classifying device results in a sharpness of separation of the classifying material that has not yet been achieved.

Um über die gesamte Breite der Vorrichtung eine gleichgute Trennung der Materialien zu gewährleisten, weist die Luftdüse eine Breite auf, die etwa der Breite der Sichteinrichtung entspricht. Anstelle einer einzigen Luftdüse können auch mehrere Luftdüsen nebeneinander und/oder übereinander angeordnet sein.In order to ensure an equally good separation of the materials over the entire width of the device, the air nozzle has a width which corresponds approximately to the width of the viewing device. Instead of a single air nozzle, a plurality of air nozzles can also be arranged side by side and / or one above the other.

Damit bei unterschiedlichster Zusammensetzung der zu trennenden Materialien eine gute Sichtung erreicht wird, ist die Luftblaseinrichtung in ihrer Höhe, ihrem Winkel und/oder in ihrer Entfernung zur Sichteinrichtung einstellbar.In order that a good sighting can be achieved with the most varied composition of the materials to be separated, the height, angle and / or distance of the air-blowing device can be adjusted to the sighting device.

Durch die einstellbare Zuordnung von Zuführeinrichtung und Sichteinrichtung ist eine individuelle Anpassung an die jeweils vorherrschenden Sicht- und Sortierbedingungen möglich. Der Abstand zwischen dem Abgabeende der Zuführeinrichtung und der Sichteinrichtung sollte um ein optimales Ergebnis zu erzielen das 1,5 bis 5-fache vorzugsweise das 2-3 fache des größten mittleren Durchmessers der Brocken der Materialmischung betragen. D.h. beispielsweise bei einem maximalen mittleren Brockendurchmesser einer Materialmischung von 30 mm ein Abstand von ca. 60 - 90 mm.The adjustable assignment of feeding device and viewing device enables individual adaptation to the prevailing viewing and sorting conditions. The distance between the discharge end of the feed device and the classifying device should be 1.5 to 5 times, preferably 2-3 times the largest average diameter of the chunks of the material mixture in order to achieve an optimal result. I.e. for example, with a maximum average chunk diameter of a material mixture of 30 mm, a distance of approximately 60-90 mm.

Besonders gute Ergebnisse beim Trennen unterschiedlichster Materialien wurden mit einer als Sichttrommel ausgebildeten Sichteinrichtung erzielt. Das Überraschende ist hierbei, daß in nicht vorhersehbarer Weise diese einfache Trommel bisher nicht erreichte Sicht- und Trennergebnisse bringt. Das zu sortierende Material wird unmittelbar von der Zuführeinrichtung auf die obere Hälfte der der Zuführeinrichtung zugewandten Außenfläche dieser rotierend angetriebenen Trommel aufgegeben. Durch den auf die obere Hälfte der der Zuführeinrichtung zugewandten Seite der Sichttrommel gerichteten Luftstrom werden die leichteren Materialien gegen die Außenwand der Sichttrommel gedrückt und durch den Luftstrom und die rotierende Sichttrommel fortgerissen, während die schweren Materialien vor der Sichttrommel, wie weiter oben beschrieben, nach unten fallen.Particularly good results when separating a wide variety of materials were achieved with a classifying device designed as a classifying drum. The surprising thing here is that this simple drum brings unprecedented visual and separation results. The material to be sorted is fed directly from the feed device onto the upper half of the outer surface of this rotatingly driven drum facing the feed device. The air flow directed towards the upper half of the side of the viewing drum facing the feed device presses the lighter materials against the outer wall of the viewing drum and is carried away by the air flow and the rotating viewing drum, while the heavy materials in front of the viewing drum, as described above, go down fall.

Um eine noch weitere Steigerung der schon sehr hohen erfindungsgemäß mit einer Sichttrommel erreichten Trennung zu erreichen, kann vorgesehen werden, daß mehrere Sichttrommeln hintereinander angeordnet sind, denen jeweils eine Luftblaseinrichtung zugeordnet ist. Vorteilhaft kann sich diese Anordnung für das Sortieren von Materialmischungen auswirken, deren Bestandteile nach ihrer Form (Körperform) und/oder spezifischen Gewicht an sich relativ schwer trenn- und unterscheidbar sind.In order to achieve a still further increase in the separation already achieved according to the invention with a viewing drum, it can be provided that several viewing drums are arranged one behind the other, each of which is assigned an air blowing device. This arrangement can have an advantageous effect on the sorting of material mixtures, the components of which are relatively difficult to separate and distinguish themselves according to their shape (body shape) and / or specific weight.

Um ein optimales Sichtergebnis zu erreichen, kann es erforderlich sein, die Sichttrommel mit unterschiedlichen Drehzahlen anzutreiben.In order to achieve an optimal viewing result, it may be necessary to drive the viewing drum at different speeds.

Um bei schwierig zu trennenden Materialien ein ausreichend gutes Trennungsergebnis erzielen zu können, kann es sinnvoll sein, daß die Sichteinrichtung oder das Förderband auf ihrer Außenseite mit Ansätzen wie beispielsweise Noppen, Drahtstifte etc. besteht.In order to be able to achieve a sufficiently good separation result in the case of materials which are difficult to separate, it can be useful for the sighting device or the conveyor belt to have lugs such as knobs, wire pins etc. on its outside.

Weitere Einzelheiten der Erfindung sind den übrigen Unteransprüchen der Beispielsbeschreibung und Zeichnungen zu entnehmen. Hierbei zeigen

Fig. 1

die erfindungsgemäße Trennvorrichtung in Seitenansicht und Prinzipdarstellung,
Fig. 2

die Zuordnung von Zuführeinrichtung und Sichteinrichtung in der Draufsicht und Prinzipdarstellung,
Fig. 3

eine weitere Zuordnung von Zuführeinrichtung und Sichteinrichtung in Draufsicht und Prinzipdarstellung,
Fig. 4

eine weitere Sichttrommel mit auf der Außenwand angeordneten Noppen in Seitenansicht und Prinzipdarstellung,
Fig. 5

eine weitere Trennvorrichtung in Seitenansicht und Prinzipdarstellung und
Fig. 6

eine weitere Trennvorrichtung in Seitenansicht und Prinzipdarstellung.
Further details of the invention can be found in the remaining subclaims of the example description and drawings. Show here
Fig. 1

the separation device according to the invention in side view and schematic diagram,
Fig. 2

the assignment of the feeding device and the viewing device in the top view and schematic diagram,
Fig. 3

a further assignment of feed device and viewing device in plan view and schematic diagram,
Fig. 4

another view drum with knobs arranged on the outer wall in a side view and a schematic diagram,
Fig. 5

another separation device in side view and schematic diagram and
Fig. 6

another separation device in side view and schematic diagram.

Die Vorrichtung weist die als Schwingförderer 1 ausgebildete Zuführeinrichtung und die als Sichttrommel 2 ausgebildete Sichteinrichtung auf. Der Schwingförderer 1 ist auf dem Rahmen 3 schwingend angeordnet und wird durch den Schwingungsantrieb 4 angetrieben. Vor dem Schwingförderer 1 ist das Zuführtransportband 5 angeordnet. In Förderrichtung 6 gesehen ist hinter dem Schwingförderer 1 die Sichttrommel 2 drehbar angeordnet. Die Sichttrommel 2 weist einen geschlossenen Außenmantel 7 auf und wird von einem nicht dargestellten Antriebsmotor in Pfeilrichtung 8 rotierend angetrieben. Der obere Punkt 9 der Sichttrommel 2 befindet sich im dargestellten Ausführungsbeispiel tiefer als das Abgabeende 10 des Schwingförderers 1. Die Drehachse 11 der Sichttrommel 2 ist quer zur Förderrichtung 6 des Schwingförderers 1 ausgerichtet, so daß die Sichttrommel 2 mit ihrer Drehachse 11 quer zur Förderrichtung 6 des Schwingförderers 1 angeordnet ist.The device has the feed device designed as a vibrating conveyor 1 and the viewing device designed as a viewing drum 2. The vibratory conveyor 1 is arranged on the frame 3 and is driven by the vibratory drive 4. The feed conveyor belt 5 is arranged in front of the vibratory conveyor 1. Seen in the conveying direction 6, the viewing drum 2 is rotatably arranged behind the vibrating conveyor 1. The viewing drum 2 has a closed outer jacket 7 and is driven by a drive motor, not shown, rotating in the direction of the arrow 8. The upper point 9 of the viewing drum 2 is located lower than the discharge end 10 of the vibrating conveyor 1 in the exemplary embodiment shown of the vibratory conveyor 1 is arranged.

Unterhalb der Sichttrommel ist auf der vorderen Seite der Sichttrommel 2 das Förderband 12 und auf der hinteren Seite das Förderband 13 angeordnet.The conveyor belt 12 is arranged below the viewing drum on the front side of the viewing drum 2 and the conveyor belt 13 on the rear side.

In dem Übergangsbereich 14 zwischen dem Schwingförderer 1 und der Sichttrommel 2 ist die Lufteinblaseinrichtung 15 mit der Luftdüse 16 angeordnet. Die Lufteinblaseinrichtung 15 ist über einen nicht dargestellten Schlauch mit einem ebenfalls nicht dargestellten Gebläse verbunden. Die Luftdüse 16 weist eine Breite auf, die etwa der Breite der Sichttrommel 2 wie Fig. 2 zeigt entspricht. Anstelle einer einzigen Luftdüse 16 können auch mehrere Luftdüsen nebeneinander und übereinander angeordnet sein. Die Luftdüse 16 ist in ihrer Höhe, ihrem Winkel sowie in ihrer Entfernung zur Sichttrommel 2 einstellbar. Im gezeigten Ausführungsbeispiel ist der aus der Luftdüse 16 austretende Luftstrom, wie durch den Pfeil 17 angedeutet ist, etwa tangential zur oberen Hälfte der dem Schwingförderer 1 zugewandten Seite der Sichttrommel 2 gerichtet.The air injection device 15 with the air nozzle 16 is arranged in the transition region 14 between the vibratory conveyor 1 and the viewing drum 2. The air injection device 15 is connected via a hose, not shown, to a blower, also not shown. The air nozzle 16 has a width which corresponds approximately to the width of the viewing drum 2 as shown in FIG. 2. Instead of a single air nozzle 16, a plurality of air nozzles can also be arranged side by side and one above the other. The air nozzle 16 is adjustable in its height, its angle and its distance from the viewing drum 2. In the exemplary embodiment shown, the air stream emerging from the air nozzle 16, as indicated by the arrow 17, is directed approximately tangentially to the upper half of the side of the viewing drum 2 facing the vibrating conveyor 1.

Die Sichttrommel 2 ist über ihren Antriebsmotor mit unterschiedlichen Drehzahlen sowie wahlweise in beide möglichen Drehrichtungen antreibbar, wobei die Sichttrommel 2 in dem Ausführungsbeispiel in Pfeilrichtung 8 angetrieben wird. Weiterhin ist die Sichttrommel 2 an dem Rahmen 18 in Höhenrichtung verstell- und einstellbar angeordnet, so daß der obere Punkt 9 (Scheitelpunkt) tiefer, auf gleicher Höhe oder höher als der Abgabepunkt 10 des Schwingförderers 1 eingestellt werden kann.The viewing drum 2 can be driven via its drive motor at different speeds and optionally in both possible directions of rotation, the viewing drum 2 being driven in the direction of arrow 8 in the exemplary embodiment. Furthermore, the viewing drum 2 is arranged on the frame 18 so as to be adjustable and adjustable in the vertical direction, so that the upper point 9 (apex) can be set lower, at the same height or higher than the delivery point 10 of the vibratory conveyor 1.

Darüberhinaus kann die Sichttrommel 2 in nicht dargestellter Weise in verschiedenen Abständen zu dem Abgabeende 10 des Schwingförderers 1 eingestellt werden. Auch die Förderbänder 12 und 13 können zu der Sichttrommel 2 in nicht dargestellter Weise eingestellt werden.In addition, the viewing drum 2 can be set in a manner not shown at different distances from the discharge end 10 of the vibratory conveyor 1. The conveyor belts 12 and 13 can also be adjusted to the viewing drum 2 in a manner not shown.

Die aus der Luftdüse 16 austretende Luftmenge sowie die Geschwindigkeit, mit der die Luft aus der Luftdüse 16 austritt, ist über eine nicht dargestellte Reguliereinrichtung einstellbar.The amount of air emerging from the air nozzle 16 and the speed at which the air exits the air nozzle 16 can be adjusted via a regulating device (not shown).

Die Funktionsweise der Trennvorrichtung gemäß Fig. 1 ist folgende:
Die zu sortierende und zu trennende Materialmischung aus Materialien mit unterschiedlichem spezifischen Gewicht (wie beispielsweise Steinschutt, Folien, Styropor, Papier, Holz etc.) wird beispielsweise aus einem Vorratsbunker mittels des Förderbandes 5, wie durch den Pfeil 19 angedeutet ist, auf den Schwingförderer 1 aufgegeben. Der Schwingförderer 1 fördert die Materialmischung in vergleichmäßigender Weise in Pfeilrichtung 6 weiter. Am Abgabepunkt 10 des Schwingförderers 1 werden die verschiedenen Materialteile der Materialmischung gegen die obere Hälfte der dem Schwingförderer 1 zugewandten Seite des Außenmantels 7 der in Pfeilrichtung 8 rotierenden Sichttrommel 2 geleitet. Die Sichttrommel 2 rotiert mit einer geringen Umfangsgeschwindigkeit, angeglichen an die Geschwindigkeit des Materialstromes. Durch den aus der Luftdüse 16 austretenden Luftstrom, der durch den Pfeil 17 angedeutet ist, werden vor allem die Materialteile, die ein geringes spezifisches Gewicht besitzen, wie Folien, Papier, Styropor etc., gegen den Außenmantel 7 der Sichttrommel 2 gedrück. Hierdurch wird die Reibungskraft zwischen diesen "leichten" Materialteilen und dem Außenmantel 7 der Sichttrommel 2 erhöht. Diese "leichten" Materialteile werden durch die Drehbewegung der Sichttrommel 2, unterstützt von dem Luftstrom 17, in Pfeilrichtung 20 mitgenommen und fallen dann anschließend auf das Förderband 13. Das Förderband 13 fördert diese aussortierten "leichten" Materialien dann zu einem Behälter oder zu einer Auffangstation. Die schweren Materialteile der Materialmischung prallen gegen den Außenmantel 7 der Sichttrommel 2 und werden durch die Sichttrommel 2 abgebremst, von der Sichttrommel 2 aufgrund der Aufprallenergie in den Luftstrom zurückgeworfen. Hierbei lösen sich anhaftende und sich im Windschatten befindende leichte Teile von den schwereren zurückgeworfenen Teilen, so daß diese leichten Teile von dem Luftstrom 17 erfaßt und fortgerissen werden. Die schweren Teile fallen dann nach unten auf der Förderband 12. Das Förderband 12 fördert diese separierten "schweren" Materialteile zu einem anderen Behälter oder Lagerplatz. Am Außenmantel 7 anhaftende Teile werden durch den Abstreifer 21 vom Außenmantel abgeschabt.The functioning of the separating device according to FIG. 1 is as follows:
The material mixture to be sorted and separated from materials with different specific weights (such as stone rubble, foils, styrofoam, paper, wood, etc.) is, for example, from a storage bunker by means of the conveyor belt 5, as indicated by arrow 19, onto the vibratory conveyor 1 given up. The vibratory conveyor 1 further promotes the material mixture in a comparatively manner in the direction of arrow 6. At the delivery point 10 of the vibratory conveyor 1, the various material parts of the material mixture are directed against the upper half of the side of the outer jacket 7 of the viewing drum 2 rotating in the direction of the arrow 8 facing the vibratory conveyor 1. The viewing drum 2 rotates at a low peripheral speed, adapted to the speed of the material flow. Due to the air flow emerging from the air nozzle 16, which is indicated by the arrow 17, especially the material parts that have a low specific weight, such as foils, paper, polystyrene, etc., are pressed against the outer jacket 7 of the viewing drum 2. As a result, the frictional force between these "light" material parts and the outer jacket 7 of the viewing drum 2 is increased. These "light" material parts are carried along by the rotation of the viewing drum 2, supported by the air flow 17, in the direction of the arrow 20 and then fall onto the conveyor belt 13. The conveyor belt 13 then conveys these sorted out "light" materials to a container or to a collecting station . The heavy material parts of the material mixture collide against the outer casing 7 of the viewing drum 2 and are braked by the viewing drum 2 and thrown back into the air flow by the viewing drum 2 due to the impact energy. Here, adhering and in the slipstream light parts detach from the heavier parts thrown back, so that these light parts are caught by the air stream 17 and torn away. The heavy parts then fall down on the conveyor belt 12. The conveyor belt 12 conveys these separated "heavy" material parts to another container or storage location. Parts adhering to the outer jacket 7 are scraped off the outer jacket by the stripper 21.

Die Fig. 3 zeigt eine weitere Möglichkeit der Zuordnung von einer als Schwingförderer 1' ausgebildeten Zuführeinrichtung und einer als Sichttrommel 2' ausgebildeten Sichteinrichtung. Die Sichttrommel 2' ist mit ihrer Drehachse 11 im Winkel alpha zu der Förderrichtung 6' des Schwingförderers 1' angestellt. Das Abgabeende 10' des Schwingförderers 1' verläuft in der Draufsicht gesehen annähernd parallel zur Drehachse 11' der Sichttrommel 2'.FIG. 3 shows a further possibility of assigning a feed device designed as an oscillating conveyor 1 'and a viewing device designed as a viewing drum 2'. The viewing drum 2 'is set with its axis of rotation 11 at an angle alpha to the conveying direction 6' of the vibratory conveyor 1 '. The discharge end 10 'of the vibratory conveyor 1', viewed in plan view, runs approximately parallel to the axis of rotation 11 'of the viewing drum 2'.

Die Sichttrommel 30, gemäß Fig. 4, ist anstelle der Sichttrommel 2 in die Fig. 1 dargestellte Trennvorrichtung bei schwierigen Sicht- und Trennbedingungen einsetzbar. Die Sichttrommel 30 weist auf der Außenseite ihres Außenmantels 31 die auf ihrem Umfang und ihrer Breite verteilten Noppen oder Queransätze 32 auf. Hierdurch wird die Trennwirkung der Sichttrommel 30 vor allem beim Sortieren und Sichten von Materialteilen ähnlicher Form erheblich verbessert.The sight drum 30, according to FIG. 4, can be used instead of the sight drum 2 in the separating device shown in FIG. 1 in difficult sight and separation conditions. The viewing drum 30 has on the outside of its outer jacket 31 the knobs or transverse projections 32 distributed over its circumference and its width. As a result, the separating effect of the viewing drum 30 is considerably improved, especially when sorting and viewing material parts of a similar shape.

Die Fig. 5 zeigt, daß anstelle einer einzigen Sichttrommel, wie in Fig. 1, mehrere Sichttrommeln 33 hintereinander, in Sichtrichtung 34 gesehen, angeordnet werden können. Wie in Fig. 5 entnommen werden kann, ist die jeweils in Sichtrichtung 34 gesehene nachgeordnete Sichttrommel 33 tiefer als die vorhergehende angeordnet. Jeder Sichttrommel 33 ist eine als Luftdüse 35 ausgebildete Luftblaseinrichtung zugeordnet. In nicht dargestellter Weise sind die Sichttrommeln 33 in ihren Abständen (Höhen (A) - und/oder Folgeabstand (B)) zueinander ein- und verstellbar; d.h. diese Abstände sind den Erfordernissen entsprechend variabel. Die Drehachsen 36 der Sichttrommel 33 können auf einer geraden oder gekrümmten (konvex oder konkav) Linie angeordnet sein. Es ist auch möglich, Sichttrommeln 33 mit unterschiedlichen Außendurchmesser hintereinander anzuordnen.5 shows that instead of a single viewing drum, as in FIG. 1, a plurality of viewing drums 33 can be arranged one behind the other, viewed in the viewing direction 34. As can be seen in FIG. 5, the downstream viewing drum 33 seen in the viewing direction 34 is arranged lower than the previous one. An air blowing device designed as an air nozzle 35 is assigned to each viewing drum 33. In a manner not shown, the viewing drums 33 can be adjusted and adjusted in their distances (heights (A) and / or subsequent distance (B)) from one another; i.e. these distances are variable according to the requirements. The axes of rotation 36 of the viewing drum 33 can be arranged on a straight or curved (convex or concave) line. It is also possible to arrange viewing drums 33 with different outer diameters one behind the other.

Die Fig. 6 zeigt den Einsatz eines Förderbandes 37 anstelle der in Fig. 1 dargestellten Sichttrommel 2. Das Förderband 37 ist schräg nach oben angestellt und auf seiner Sichtseite 38 bogenförmig gekrümmt geführt. Wie durch den Pfeil 20 angedeutet ist, wird das "leichtere" Material auf das Förderband 13 geleitet, während das "schwerere" Material auf das Förderband 12 fällt.FIG. 6 shows the use of a conveyor belt 37 instead of the viewing drum 2 shown in FIG. 1. The conveyor belt 37 is positioned obliquely upwards and is guided in an arcuate manner on its visible side 38. As indicated by arrow 20, the "lighter" material is directed onto the conveyor belt 13, while the "heavier" material falls onto the conveyor belt 12.

Im übrigen sei bemerkt, daß der Trennungsvorgang der Materialmischung gemäß den Anlagen nach der Figur 6 dem Trennvorgang, wie für die Anlage gemäß Fig. 1 beschrieben ist, entspricht.Incidentally, it should be noted that the separation process of the material mixture according to the systems according to FIG. 6 corresponds to the separation process as described for the system according to FIG. 1.

Claims (19)

  1. Device for separating a mixture of materials with different specific gravity, which has a feed device (1, 5) for supplying a mixture of materials to a driven screening device (2, 22, 32, 33, 35) which is disposed with its axis of rotation (11) transverse to the direction of transport (6) of the feed device (1, 5), the mixture of materials being deliverable on to the external side of the screening device (2, 22, 32, 33, 35), an air blower arrangement (15, 16) being disposed in the transitional area (14) between the feed device and the screening device, and the direction of rotation of the screening drum coinciding at its upper portion with the conveyor means of the feed device, characterised in that the mixture of materials may be delivered from the feed device (1, 5) directly on to the screening device (2, 22, 32, 33, 35), the flow of air from the air blower arrangement (15, 16) is directed obliquely upwards and at least partly towards the external side of the screening device (2, 22, 32, 33, 35), on to the region of the delivery point of the mixture of materials from the feed device (1, 5) on to the screening device, and the delivery point of the feed device, with respect to the screening drum, is so disposed that the particles of material may be directed against the upper half of the side facing the feed device.
  2. Device according to claim 1, characterised in that the air blower arrangement (15) is in the form of an air nozzle (16).
  3. Device according to claim 2, characterised in that the width of the air nozzle (15) substantially corresponds to that of the screening device (2, 22, 32, 33, 35).
  4. Device according to claim 2, characterised in that a plurality of air nozzles disposed next to one another are distributed across the width of the screening device (2, 22, 32, 33, 35).
  5. Device according to claim 2, characterised in that a plurality of air nozzles are disposed one above the other.
  6. Device according to one or more of the preceding claims, characterised in that the height and/or angle of the air blower arrangement (15, 16) are adjustable.
  7. Device according to one or more of the preceding claims, characterised in that the spacing between the air blower arrangement (15, 16) and the screening device (2, 22, 32, 33, 35) is adjustable.
  8. Device according to one or more of the preceding claims, characterised in that the feed device and the screening device are displaceable in their relationship to one another.
  9. Device according to claim 1, characterised in that the screening device (2, 22, 32, 33, 35) is in the form of a screening drum (2, 22, 30).
  10. Device according to claim 1, characterised in that the screening device comprises a plurality of screening drums disposed one behind the other, and with which the air blower arrangement is associated.
  11. Device according to claim 10, characterised in that the respectively subsequent screening drum is lower than the preceding one.
  12. Device according to claim 10, characterised in that the screening drums may be adjusted and set relative to one another.
  13. Device according to claim 1, characterised in that the screening device is in the form of an obliquely upwardly-set conveyor belt (33, 35).
  14. Device according to claim 10, characterised in that the conveyor belt (33, 35) is guided on its visible side in a rectilinear or curvilinear configuration.
  15. Device according to one or more of the preceding claims, characterised in that the flow of air emerging from the air nozzle (16) is directed substantially on to the upper half of the side of the screening drum (2, 22, 30) facing the feed device (1).
  16. Device according to one or more of the preceding claims, characterised in that the flow of air emerging from the air nozzle (16) is directed approximately tangentially on to the upper half of the side of the screening drum (2, 22, 30) facing the feed device (1).
  17. Device according to one or more of the preceding claims, characterised in that the screening drum (2, 22, 30) may be driven at various rotational speeds.
  18. Device according to one or more of the preceding claims, characterised in that the amount of air emerging from the air nozzle(s) (16) and/or the speed at which the air emerges from the air nozzles, are adjustable and/or regulable.
  19. Device according to one or more of the preceding claims, characterised in that the screening device (30) or the conveyor belt are fitted on their external side with projections (32) such for example as knobs, wire pins etc.
EP92120598A 1991-12-10 1992-12-03 Device for separating a mixture of materials with different specific gravity Expired - Lifetime EP0546442B1 (en)

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DE4140584 1991-12-10

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US8307987B2 (en) 2006-11-03 2012-11-13 Emerging Acquisitions, Llc Electrostatic material separator
US8618432B2 (en) 2007-12-18 2013-12-31 Emerging Acquisitions, Llc Separation system for recyclable material
US8336714B2 (en) 2009-05-14 2012-12-25 Emerging Acquistions, LLC Heating system for material processing screen
EP2366461A1 (en) 2010-03-19 2011-09-21 WESTERIA Fördertechnik GmbH Air classifier with distribution plates
DE102010016735A1 (en) 2010-03-19 2011-09-22 WESTERIA Fördertechnik GmbH Air classifier with distributor plates
KR101541981B1 (en) * 2010-09-14 2015-08-04 디르크 바른슈테트 Method for separating planar and three-dimensional solids in a flow of bulk goods
DE202016102456U1 (en) 2016-05-09 2016-07-01 WESTERIA Fördertechnik GmbH Semi-mobile sifter plant

Also Published As

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ATE124892T1 (en) 1995-07-15
DE59202873D1 (en) 1995-08-17
DE4140584A1 (en) 1993-06-17
DE4140584C2 (en) 1995-01-26
EP0546442A3 (en) 1994-01-12
EP0546442A2 (en) 1993-06-16

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