NL2013001B1 - Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor. - Google Patents

Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor. Download PDF

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Publication number
NL2013001B1
NL2013001B1 NL2013001A NL2013001A NL2013001B1 NL 2013001 B1 NL2013001 B1 NL 2013001B1 NL 2013001 A NL2013001 A NL 2013001A NL 2013001 A NL2013001 A NL 2013001A NL 2013001 B1 NL2013001 B1 NL 2013001B1
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NL
Netherlands
Prior art keywords
rotor
particle
particle stream
separation device
drum
Prior art date
Application number
NL2013001A
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Dutch (nl)
Inventor
Leeftink Robert
Pijlman Wietse
Original Assignee
Codeco Dev B V
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Publication date
Application filed by Codeco Dev B V filed Critical Codeco Dev B V
Priority to NL2013001A priority Critical patent/NL2013001B1/en
Priority to PCT/NL2015/050440 priority patent/WO2015194949A1/en
Priority to EP15736321.9A priority patent/EP3154715B1/en
Application granted granted Critical
Publication of NL2013001B1 publication Critical patent/NL2013001B1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04Cleaning by suction, with or without auxiliary action

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  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention relates to a liberation and separation device (1) for separating a first fraction (2) of particles from a second fraction (3) of particles, comprising: a driven rotor (4), having a rotational axis and rotor blades (5) arranged for rotating around the rotational axis in a rotational direction (6), an infeed device (7) for introducing a particle stream into the liberation and separation device, a distribution device or area (9) for distributing the particle stream towards the rotor in a downwards particle inflow direction (10), to a particle contact area (11) where the particle stream contacts the rotor blades, an airflow generator (12) for generating an airflow towards the rotor in an air inflow direction (13) perpendicular to the particle inflow direction, wherein in the particle contact area the rotational direction is aligned with the air inflow direction for creating a low pressure zone in the particle contact area.

Description

Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor
Field of the invention [0001] The present invention relates to a liberation and separation device for separating a first fraction with particles having first sizes in a first size range, second fraction with particles having second sizes in a second size range, comprising: a driven rotor, having a substantially horizontal rotational axis and a plurality of rotor blades arranged for rotating around the rotational axis in a rotational direction, an infeed device for introducing the particle stream into the liberation and separation device, a distribution area or device for distributing the particle stream from the infeed device towards the rotor in a substantially downwards particle inflow direction, to a particle contact area where the particle stream contacts the rotor blades.
Background of the invention [0002] Such liberation and separation devices are known. The known device may comprise a separation apparatus for separating from a particle stream with moist particles a first fraction with particles of a first group of dimensions and a second fraction with particles of a second group of dimensions, comprising an in-feed device for the particle stream and a rotatable drum with plates at its circumference. Each plate may have a radially extending hitting surface for hitting the particles (the impact of the plates on the particles causes ‘liberation’ of agglomerated particles and acceleration of the particles, which causes a ballistic trajectory). Receiving areas are provided for receiving the particles of both the first and the second fraction along with a conveyor for discharging the particles from the receiving areas.
[0003] A disadvantage of the known liberation and separation devices is that they offer little control of operational variables such as falling speed of particles falling towards the particle contact area or ballistic properties of the particles liberated by the rotor. Another disadvantage is that light particles, for instance dust particles, often do not reach the particle contact area and are thus ‘missed’ by the rotor blades due to an air shell surrounding the rotor. Yet another disadvantage of the known liberation and separation device is that dust can hardly be dealt with in an efficient manner.
[0004] It is therefore an object of the present invention to provide a liberation and separation device that offers more control of operational variables, especially improved control of ballistic properties of the liberated particles. Another object of the invention is to provide a liberation and separation device wherein virtually all particles reach the particle contact area. A further object of the invention is to provide a liberation and separation device that allows dust to be dealt in an efficient way.
Summary of the invention [0005] Thereto, the liberation and separation device according to the invention is characterized in that the liberation and separation device comprises an airflow generator for, during use, generating an airflow towards the rotor in an air inflow direction substantially perpendicular to the particle inflow direction and the rotational axis, wherein in the particle contact area the rotational direction is aligned with the air inflow direction for creating a low pressure zone in the particle contact area.
[0006] By using the above airflow generator a low pressure zone is created in the particle contact area due to the so-called ‘Magnus effect’. Because of the rotational direction of the rotor being aligned with the air inflow direction, the incoming airflow is accelerated in the particle contact area and, consequently, lower pressure results. This inventive use of the aforementioned Magnus effect allows increased control of operation variables. The falling speed of the particles, for instance, can be controlled by increasing or decreasing the rotational speed of the rotor and/or increasing or decreasing the air speed of the incoming air flow, to decrease, respectively increase, the static pressure in the particle contact area and thus the suction force exerted by the partiele contact area on the falling particles. Due to the above, operational manageability of the liberation and separation device is greatly increased.
[0007] Furthermore, due to such an increased suction force being exerted on the falling particles, virtually all particles (also light particles) will reach the particle contact area in order to be ‘hit’ by the rotor blades. This also allows dust to be dealt with in an efficient manner, as also dust particles (i.e. very light particles) will be drawn towards the particle contact area. A suction device can be installed, for instance, to suck the dust particles away from the particle contact area. In addition, the ballistic properties of the particles liberated by the rotor can be adapted in an advantageous manner.
[0008] An embodiment relates to an aforementioned liberation and separation device, wherein the rotor has an open rotor design, comprising an open space between opposite rotor blades to allow particles from the particle stream to pass through the rotor. Especially very light particles, such as dust particles, can be advantageously sucked into the rotor, for example to be disposed of. In any case, the open rotor design allows even more operational variables to be changed for optimal operation of the liberation and separation device.
[0009] An embodiment relates to an aforementioned liberation and separation device, wherein a resulting deflected flow is created downstream of the rotor during use, wherein a suction device is arranged downstream of the rotor for removing dust particles from the deflected flow. The Magnus-effect creates a predictable flow downstream of the rotor, in the context of this patent application referred to as the resulting deflected flow. Especially very light particles, such as dust particles, are caught in this flow and flow along therewith. Due to the predictability of this flow, especially with respect to the very light particles present therein, a suction device can be advantageously arranged downstream of the rotor to remove dust particles from the deflected flow.
[0010] An embodiment relates to an aforementioned liberation and separation device, comprising a suction device arranged near the rotor for providing a suction force in the open space to remove particles therefrom. This allows dust particles or very light particles to be dealt with immediately upon entry thereof into the open space of the rotor.
[0011] An embodiment relates to an aforementioned liberation and separation device, wherein a wing-like body is provided downstream of the rotor, having a first surface and a second, opposing surface converging towards a trailing edge, wherein the first and second surfaces diverge upstream towards the rotor to form a third, curved surface, the third surface with one end being connected to the first surface and with an opposing end connected to the second surface, wherein the third surface is tightly arranged along a part of a rotational circumference of the rotor, the curvature of the third surface being the same as the curvature of the rotational circumference of the rotor. The wing-like body creates an even larger suction force in the particle contact area, without necessitating the use of a larger diameter rotor.
[0012] An embodiment relates to an aforementioned liberation and separation device, comprising a first reception means, having a first receiving area arranged at a first receiving distance from the rotor, for receiving and discharging the first fraction of particles.
[0013] An embodiment relates to an aforementioned liberation and separation device, comprising a second reception means, having a second receiving area arranged at a second receiving distance from the rotor, for receiving and discharging the second fraction of particles, wherein the second receiving distance is larger than the first receiving distance.
[0014] An embodiment relates to an aforementioned liberation and separation device, wherein the airflow generator is arranged at a same height as the rotor, the air inflow direction being substantially horizontal. The airflow itself thus interferes in a relatively minimal way with the hitting action of the rotor blades. Furthermore, in practice, a vertical wall of the liberation and separation device will often be present near the rotor. The airflow generator can be installed in or near this wall to conveniently transport air from the outside of the liberation and separation device to the inside thereof.
[0015] Another embodiment relates to an aforementioned liberation and separation device, comprising a rotatable drum having a drum wall comprising a drum space, the drum being rotatable around a drum rotation axis, wherein, in a cross-section transversal to the drum rotation axis, the drum space comprises: an outlet of the infeed device, being arranged for introducing the particle stream into the drum space during use, wherein, due to rotation of the drum in a rotational direction, a substantially oval particle stream is formed moving along a substantially oval particle trajectory inside the drum space, wherein a part of the oval particle stream contacts the drum wall, an outlet of an air blower device, being arranged for blowing air within the oval particle trajectory in a direction towards an upper part of the oval particle stream not contacting the drum wall, for blowing the particles of the first fraction outside from the oval particle stream to form a first fraction particle stream, the rotor, being arranged outside of the oval particle stream and being arranged below the first fraction particle stream for receiving the first fraction particle stream in the particle contact area, wherein the rotational axis of the rotor is parallel to the drum rotation axis and the rotational direction of the rotor opposes the rotational direction of the drum, wherein in the particle contact area the particles of the first fraction particle stream are hit by the rotor blades in order to be propelled back into the oval particle stream, the air flow generator, being positioned outside of the oval particle stream and being arranged for, during use, generating the airflow towards the upper part of the rotor in the air inflow direction for creating the low pressure zone in the particle contact area.
Advantageously, the relatively light particles of the first fraction particle stream can be propelled back into the oval particle stream by the rotor to reduce the particle size of particles in the oval particle stream (this is realized by the impact and abrasive action of the relatively lighter/smaller particles on the particles of the oval particle stream).
[0016] An embodiment relates to an aforementioned liberation and separation device, wherein the airflow generator is arranged for, during use, generating the airflow towards the upper part of the rotor in the air inflow direction by means of suction created in a downstream area of the rotor. In some cases, for example when space is tight, it can be more convenient to create an airflow over the rotor by means of suction, instead of by blowing air towards the rotor from an upstream airflow generator.
[0017] An embodiment relates to an aforementioned liberation and separation device, wherein above the rotor a funnel-shaped body is arranged having an upper end with a first inner diameter for receiving the first fraction particle stream and a lower end for discharging the first fraction particle stream with a second inner diameter, the first inner diameter being larger than the second inner diameter. Thus, a more condensed first fraction particle stream falls onto the rotor, allowing improved control.
[0018] An embodiment relates to an aforementioned liberation and separation device, wherein downstream of the rotor a flow guidance body is arranged, extending between the rotor and a drum wall area where the oval particle stream contacts the drum wall, an upper part of the flow guidance body being arranged for guiding a lower part of the oval particle stream from the rotor to the drum wall area. In this way, improved recirculation and centrifugation of particles is achieved inside the drum.
[0019] An embodiment relates to an aforementioned liberation and separation device, wherein the airflow generator is embodied to use the suction created in the downstream area of the rotor to suck away dust particles. By doing so, the suction has thee advantageous double use of creating both the airflow over the rotor as well as directly removing very light particles from the liberation and separation device.
Brief description of the drawings [0020] Embodiments of a liberation and separation device according to the invention will by way of non-limiting example be described in detail with reference to the accompanying drawings. In the drawings: [0021] Figure 1 shows a schematic side view of a first exemplary embodiment of a liberation and separation device according to the invention and [0022] Figure 2 shows a schematic cross-section of a second exemplary embodiment of a liberation and separation device according to the invention.
Detailed description of the invention [0023] Figure 1 shows a schematic side view of a first exemplary embodiment of a liberation and separation device 1 according to the invention. Figure 1 more specifically shows a liberation and separation device 1 for separating a first fraction 2 with particles having first sizes in a first size range, such as in the range of 0 - 5 mm, and a second fraction 3 with particles having second sizes in a second size range, such as larger than 5 mm, from a particle stream 8. Of course, these particle sizes are merely mentioned by way of example. Typically, the maximum size of the particles will be around 20 mm, due to the impact thereof on the rotor. The particle stream 8 may comprise a mix of materials with different densities. The device 1 will cause an ‘asymmetrical’ size separation in such cases. The liberation and separation device 1 comprises a driven rotor 4 having a substantially horizontal rotational axis and a plurality of rotor blades 5, such as two to twelve blades, for instance four, five or six blades, arranged for rotating around the rotational axis in a rotational direction 6. The rotor 4 may have an outer diameter of, for instance, 0,2 - 0,6 m, such as 0,5 m. The shape of the rotor blades 5, in a cross-sectional plane perpendicular to the rotational axis, may for instance be straight, i.e. plate-like, or curved, wherein the convex part of the blade is situated on the outside of the rotor. The liberation and separation device 1 furthermore comprises an infeed device 7, such as a reservoir or a conveyor belt, for introducing the particle stream 8 into the liberation and separation device 1. A distribution device or area 9, to be broadly interpreted as an arrangement that distributes the particle stream 8 towards the rotor 4, for distributing the particle stream 8 from the infeed device 7 towards the rotor 4 in a substantially downwards particle inflow direction 10. Preferably, the particle stream enters a free fall from the conveyor downwards to the rotor 4. The particle stream 8 then falls onto a particle contact area 11 where the particle stream 8 contacts the rotor blades 5. Preferably, an additional air blower 45 is arranged near the position where the particle stream 8 initiates the free fall. The air blower 45 blows in a downwards direction to selectively increase the speed of particles falling towards the rotor 4, i.e. provide some ‘tail wind’. In general, the free fall trajectory can be divided into a zone wherein the free falling particle stream 8 is influenced by the Magnus-effect of the rotor 4, and a(n upper) zone, wherein this is not the case. The air blower 45 is arranged to influence the particle speed in the latter zone. Important to note in this respect is that the particle stream 8 thins out during the free fall towards the rotor 4. Without additional ‘air support’, smaller/lighter particles therein have a lower maximum falling speed with respect to the air stream than larger/heavier particles. This pattern of particle falling speeds can be influenced advantageously by adapting the ‘tail wind’ provided by the air blower and/or by adapting the Magnus-effect provided by the rotor 4. Lighter particles may thus fall ‘deeper’ into the rotor 4, implying lower speed, different angle with curved rotor blades 5. Lighter particles may even fall through the rotor 4, in case of an open rotor design.
[0024] According to the invention, the liberation and separation device 1 comprises an airflow generator 12 for, during use, generating an airflow towards the rotor 4, preferably straight towards the rotational axis, in an air inflow direction 13. The air inflow direction 13 is substantially perpendicular to the particle inflow direction 10 and the rotational axis. In the particle contact area 11, the rotational direction is aligned with the air inflow direction 13 for creating a low pressure zone in the particle contact area 11 as part of the Magnus-effect sought after by the invention. After the particles of the particle stream 8 are ‘hit’ by the blades 5 of the rotor 4, a first fraction with finer/lighter particles as well as a second fraction with heavier/larger particles can be observed. However, in practice this distinction will be relatively hard to see, due to the first and second fractions fading into each other (i.e. a continuous distribution will occur).
[0025] As shown in figure 1, the rotor 4 may have an open rotor design with an open space 14 between opposite rotor blades 5 to allow particles from the particle stream 8 to pass/fall through the rotor 4. In case of moist particles mixes, the rotor 4 is preferably close, whereas in case of dry mixes the rotor may have the abovementioned open rotor design.
[0026] Due to the Magnus-effect, a resulting deflected flow 15 is created downstream of the rotor 4 during use. A suction device 16 is arranged downstream of the rotor 4 for removing dust particles from the deflected flow 15. Another suction device 17 can be arranged near the rotor 4 for providing a suction force in the open space 14 to remove very light particles therefrom. However, care should be exercised regarding the positioning of the suction device 16 with respect to the rotor 4, as the Magnus-effect provided by the rotor 4 must not be negatively influenced. In practice, such a suction device 16, 17 will only be used with relatively dry particle mixes. In case of moist particles the inlet of the suction device may clog up, which is highly undesirable.
[0027] As shown in figure 1, a wing-like body 18 is provided downstream of the rotor 4. The wing-like body 18 has an upper, first surface 19 and a lower, second, opposing surface 20 converging towards a trailing edge 21. The first 19 and second surfaces 20 diverge upstream towards the rotor 4 to form a third, curved surface 22. The third surface 22 is connected with one end to the first surface 19 and with an opposing end connected to the second surface 20. The third surface 22 is tightly arranged along a part of a rotational circumference of the rotor 4, i.e. the curvature of the third surface 22 is the same as the curvature of the rotational circumference of the rotor 4. The wing-like body 18 positively influences the Magnus-effect of the rotor 4. Preferably, the winglike body 18 is positioned in the so-called ‘dead zone’ behind the rotor 4.
[0028] A first reception means, such as a first container 46, is provided, having a first receiving area 24 arranged at a first receiving distance from the rotor 4, for receiving and discharging the first fraction of particles. Furthermore, a second reception means can be provided, for instance embodied by a second container 47, having a second receiving area 26, arranged at a second receiving distance from the rotor 4, for receiving and discharging the second fraction of particles. The second receiving distance is larger than the first receiving distance.
[0029] The airflow generator 12 is arranged at a same height as the rotor, the air inflow direction 13 then being substantially horizontal. In a general sense, the airflow speed generated by the airflow generator 12 may be for instance in the range of 1-10 m/s, more preferably 2-6 m/s, even more preferably 4 m/s. Thus, a suction force is created on the falling particle stream 8 creating an evenly distributed falling speed pattern of the particle stream 8.
[0030] Figure 2 shows a schematic cross-section of a second exemplary embodiment of a liberation and separation device according to the invention. Figure 2 more specifically shows a liberation and separation device 1 comprising a rotatable drum 27 having a drum wall 28 comprising a drum space 29. As opposed to for instance the embodiment of figure 1, this variant allows the particle stream to be handled by the device 1 multiple times. The device 1 as depicted in figure 2 will primarily be used for the deagglomeration or deagglutination of brittle composite materials such as concrete. Another use of the device may be the polishing of particles or the removal of dust therefrom after mineral crushing. The dust removal allows the granulate to be handled later on without the hindrance, such as health risks, provided by fine particulate matter.
[0031] The drum 27 is rotatable around a drum rotation axis. Preferably, the inside of the drum 27 has a helical shape or otherwise to allow transport of particles along the drum rotation axis (the drum rotation axis may for instance be tilted with respect to the horizontal). In a cross-section transversal to the drum rotation axis, the drum space 29 comprises an outlet 30 of the infeed device 7 (indicated schematically) being arranged for introducing the particle stream 8 into the drum space 29. Due to rotation of the drum 27, such as at a speed of about 20 RPM at a drum diameter of 2 m or a speed of 40 RPM at a drum diameter of 1 m, in a rotational direction 31, a substantially oval or elliptical particle stream 32 is formed moving along a substantially oval particle trajectory inside the drum space 29. A part 33 of the oval particle stream 32 contacts the drum wall 28 in the right part of figure 2. The drum 27 may have an inner diameter of for instance 1-3 m, such as 2 m.
[0032] An outlet 34 of an air blower device (not shown) is arranged within the oval particle trajectory 32 for blowing air in a direction towards an upper part 35 of the oval particle stream 32. Thus, the particles of the first fraction can be blown outside of the oval particle stream 32 to form a first fraction particle stream 36. The blowing speed at the outlet 34 may for example amount to 1-10 m/s, such as 2-8 m/s, for instance 4-6 m/s or 5 m/s.
[0033] The rotor 4, as shown in the left part of figure 2, is arranged outside of the oval particle stream 32 and is arranged below the first fraction particle stream 36 for receiving the first fraction particle stream 36 in the particle contact area 11. The rotational axis of the rotor 4 is parallel to the drum rotation axis and the rotational direction 6 of the rotor opposes the rotational direction of the drum 31. In the particle contact area 11 the particles of the first fraction particle stream 36 are hit by the rotor blades 5 in order to be propelled back to the right into the oval particle stream 32.
[0034] The air flow generator 12 is positioned outside of the oval particle stream 32 and is arranged for, during use, generating the airflow towards the upper part of the rotor 4 in the air inflow direction 13 for creating the low pressure zone in the particle contact area 11.
[0035] The airflow generator can simultaneously be arranged for generating the airflow towards the upper part of the rotor 4 in the air inflow direction 13 by means of suction created by a suction device 16 in a downstream area of the rotor 4 (as an alternative to enforcement or blowing). The airflow generator may be embodied to use the suction 16 created in the downstream area of the rotor 4 to suck away dust particles. Advantageously, the air blower devices 12 and 34 and the downstream suction device 16 may work together, i.e. the air blown out by the air blower device 34 can be sucked up again by the suction device 16. The air may then follow a schematically indicated trajectory as shown in the left of figure 2.
[0036] A funnel-shaped body 37 can be arranged above the rotor 4, having an upper end 38 with a first inner diameter for receiving the first fraction particle stream 36 and a lower end 39 for discharging the first fraction particle stream 36 with a second inner diameter, the first inner diameter being larger than the second inner diameter.
[0037] Downstream of the rotor 4 a flow guidance body 40 is arranged, extending between the rotor 4 and a drum wall area 41 where the oval particle stream 32 contacts the drum wall 28. An upper part of the flow guidance body 40 is arranged for guiding a lower part 42 of the oval particle stream 32 from the rotor 4 to the drum wall area 41. The flow guidance 40 body may be embodied as the wing-like body mentioned before. A suction generator 16’ can also be positioned at a lower end of the flow guidance body 40, relatively close to the drum wall 28.
[0038] An airflow generator 12 (blower) is preferably placed at a same height as the rotor 4 to provide an airflow 13 towards the rotor. The airflow 13 can also be provided by the suction device 16 only.
[0039] In general, the variant of the liberation and separation device 1 as shown in figure 2, uses the insight that fine particles during rotation of the drum are forced closer to the drum wall 28 than coarse particles. Therein, smaller particles have a lower ‘critical speed’ than larger ones. At the critical speed of the larger particles the smaller particles will stick to the drum wall 28.
[0040] Thus, the invention has been described by reference to the embodiments discussed above. It will be recognized that these embodiments are susceptible to various modifications and alternative forms well known to those of skill in the art without departing from the spirit and scope of the invention. Accordingly, although specific embodiments have been described, these are examples only and are not limiting upon the scope of the invention.
Reference numerals 1. Liberation and separation device 2. First fraction 3. Second fraction 4. Rotor 5. Rotor blade 6. Rotational direction of rotor 7. Infeed device 8. Particle stream 9. Distribution device or area 10. Particle inflow direction 11. Particle contact area 12. Airflow generator 13. Air inflow direction 14. Open space 15. Resulting deflected flow 16. Downstream suction device (16’) 17. 18. Wing-like body 19. First surface 20. Second surface 21. Trailing edge 22. Third, curved surface 23. 24. First receiving area 25. 26. Second receiving area 27. Rotatable drum 28. Drum wall 29. Drum space 30. Outlet of the infeed device 31. Rotational direction of drum 32. Oval particle stream 33. Part of oval particle stream contacting the drum wall 34. Outlet of air blower device 35. Upper part of oval particle stream 36. First fraction particle stream 37. Funnel-shaped body 38. Upper end of funnel-shaped body 39. Lower end of funnel-shaped body 40. Flow-guidance body 41. Drum wall area where oval particle stream contacts wall 42. Lower part of oval particle stream 43. 44. 45. Additional airflow generator 46. First container 47. Second container

Claims (13)

1. Vrijmaak- en scheidingsinrichting (1) voor het scheiden van een eerste fractie (2) met deeltjes met eerste afmetingen in een eerste afmetingenbereik, en een tweede fractie (3) met deeltjes met tweede afmetingen in een tweede afmetingenbereik, omvattend een aangedreven rotor (4) met een hoofdzakelijk horizontale rotatieas en een veelheid rotorbladen (5) ingericht voor het roteren rond de rotatieas in een rotatierichting (6), een invoerinrichting (7) voor het invoeren van de deeltjesstroom in de vrijmaak-en scheidingsinrichting, een distributie-inrichting of -gebied (9) voor het distribueren van de deeltjesstroom van de invoerinrichting in de richting van de rotor in een hoofdzakelijk neerwaartse deeltjesinstroomrichting (10), naar een deeltjescontactgebied (11) waar de deeltjesstroom contact maakt met de rotorbladen, met het kenmerk dat de vrijmaak- en scheidingsinrichting een luchtstroomgenerator (12, 16) omvat voor het tijdens gebruik genereren van een luchtstroom in de richting van de rotor in een luchtinstroomrichting (13) hoofdzakelijk loodrecht op de deeltjesinstroomrichting en de rotatieas, waarbij in het deeltjescontactgebied de rotatierichting is uitgelijnd met de luchtinstroomrichting voor het creëren van een lagedrukgebied in het deeltjescontactgebied.A release and separation device (1) for separating a first fraction (2) with particles with first dimensions in a first size range, and a second fraction (3) with particles with second dimensions in a second size range, comprising a driven rotor (4) having a substantially horizontal axis of rotation and a plurality of rotor blades (5) adapted to rotate about the axis of rotation in a direction of rotation (6), an input device (7) for introducing the particle stream into the release and separation device, a distribution device or area (9) for distributing the particle stream from the input device in the direction of the rotor in a substantially downward particle inflow direction (10), to a particle contact area (11) where the particle stream makes contact with the rotor blades, characterized in that the releasing and separating device comprises an air flow generator (12, 16) for generating an air flow in the direction of n the rotor in an air inflow direction (13) substantially perpendicular to the particle inflow direction and the axis of rotation, wherein in the particle contact area the direction of rotation is aligned with the air inflow direction to create a low pressure area in the particle contact area. 2. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 1, waarbij de rotor een open rotorontwerp heeft, omvattend een open ruimte (14) tussen tegenoverliggende rotorbladen om toe te staan dat deeltjes van de deeltjesstroom door de rotor heen passeren.The release and separation device (1) of claim 1, wherein the rotor has an open rotor design comprising an open space (14) between opposite rotor blades to allow particles of the particle stream to pass through the rotor. 3. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 1 of 2, waarbij tijdens gebruik een resulterende afgebogen stroming (15) wordt gecreëerd stroomafwaarts van de rotor, waarbij een afzuiginrichting (16) is aangebracht stroomafwaarts van de rotor voor het verwijderen van stofdeeltjes uit de afgebogen stroming.A release and separation device (1) as claimed in claim 1 or 2, wherein during use a resulting deflected flow (15) is created downstream of the rotor, wherein a suction device (16) is provided downstream of the rotor for removing dust particles from the deflected flow. 4. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 1, 2 of 3, wanneer afhankelijk van conclusie 2, omvattend een afzuiginrichting (17) aangebracht nabij de rotor voor het verschaffen van een zuigkracht in de open ruimte om deeltjes daaruit te verwijderen.A release and separation device (1) according to claim 1, 2 or 3, when dependent on claim 2, comprising a suction device (17) arranged near the rotor for providing a suction in the open space to remove particles therefrom. 5. Vrijmaak- en scheidingsinrichting (1) volgens een van de voorgaande conclusies, waarbij een vleugelachtig lichaam (18) is verschaft stroomafwaarts van de rotor, met een eerste oppervlak (10) en een tweede, tegenoverliggend oppervlak (20) dat convergeert in de richting van een achterrand (21), waarbij de eerste en tweede oppervlakken stroomopwaarts divergeren in de richting van de rotor ter vorming van een derde, gekromd oppervlak (22), waarbij het derde oppervlak met een eind verbonden is met het eerste oppervlak en met een tegenoverliggend eind verbonden is met het tweede oppervlak, waarbij het derde oppervlak nauwsluitend aangebracht is rond een deel van de rotatieomtrek van de rotor, waarbij de kromming van het derde oppervlak gelijk is aan de kromming van de rotatieomtrek van de rotor.A release and separation device (1) according to any of the preceding claims, wherein a wing-like body (18) is provided downstream of the rotor, with a first surface (10) and a second, opposite surface (20) converging in the direction of a trailing edge (21), wherein the first and second surfaces diverge upstream in the direction of the rotor to form a third, curved surface (22), the third surface being connected at one end to the first surface and to a opposite end is connected to the second surface, the third surface being tightly arranged around a portion of the rotor's circumference, the curvature of the third surface being the curvature of the rotor's circumference. 6. Vrijmaak- en scheidingsinrichting (1) volgens een van de voorgaande conclusies, omvattend een eerste ontvangstmiddel (46), met een eerste ontvangstgebied (24) aangebracht op een eerste ontvangstafstand van de rotor, voor het ontvangen en afvoeren van de eerste deeltj esfractie.A release and separation device (1) according to any of the preceding claims, comprising a first receiving means (46), with a first receiving area (24) disposed at a first receiving distance from the rotor, for receiving and discharging the first particle fraction . 7. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 6, omvattend een tweede ontvangstmiddel (47), met een tweede ontvangstgebied (26) aangebracht op een tweede ontvangstafstand van de rotor, voor het ontvangen en afvoeren van de tweede deeltjesfractie, waarbij de tweede ontvangstafstand groter is dan de eerste ontvangstafstand.A release and separation device (1) according to claim 6, comprising a second receiving means (47), with a second receiving area (26) disposed at a second receiving distance from the rotor, for receiving and discharging the second particle fraction, the second receiving distance is greater than the first receiving distance. 8. Vrijmaak- en scheidingsinrichting (1) volgens een van de voorgaande conclusies, waarbij de luchtstroomgenerator is aangebracht op eenzelfde hoogte als de rotor, waarbij de luchtinstroomrichting (13) hoofdzakelijk horizontaal is.A release and separation device (1) according to any of the preceding claims, wherein the air flow generator is arranged at the same height as the rotor, the air inflow direction (13) being substantially horizontal. 9. Vrijmaak- en scheidingsinrichting (1) volgens een van de conclusies 1-5, omvattend: een roteerbare trommel (27) met een trommelwand (28) omvattend een trommelruimte (29), waarbij de trommel roteerbaar is rond een trommelrotatieas, waarbij, in een doorsnede dwars op de trommelrotatieas, de trommelruimte omvat: een uitlaat (30) van de invoerinrichting, ingericht voor het tijdens gebruik invoeren van de deeltjesstroom in de trommelruimte, waarbij, door rotatie van de trommel in een rotatierichting (31), een hoofdzakelijk ovale deeltjesstroom (32) wordt gevormd die langs een hoofdzakelijk ovaal deeltjestraject beweegt in de trommelruimte, waarbij een deel (33) van de ovale deeltjesstroom contact maakt met de trommelwand, een uitlaat (34) van een luchtblaasinrichting, ingericht voor het blazen van lucht binnen de ovale deeltjesstroom in een richting naar een bovendeel (35) van de ovale deeltjesstroom toe dat geen contact maakt met de trommelwand, voor het blazen van de deeltjes van de eerste fractie buiten de ovale deeltjesstroom om een eerste-fractiedeeltjesstroom (36) te vormen, de rotor, aangebracht buiten de ovale deeltjesstroom en aangebracht lager dan de eerste-fractiedeeltjesstroom voor het ontvangen van de eerste-fractiedeeltjesstroom in het deeltjescontactgebied, waarbij de rotatieas van de rotor parallel is aan de trommelrotatieas en de rotatierichting van de rotor tegengesteld is aan de rotatierichting van de trommel, waarbij in het deeltjescontactgebied de deeltjes van de eerste-fractiedeeltjesstroom worden geraakt door de rotorbladen om terug naar de ovale deeltjesstroom voortgestuwd te worden, de luchtstroomgenerator, gepositioneerd buiten de ovale deeltjesstroom en ingericht voor het tijdens gebruik genereren van de luchtstroom in de richting van het bovendeel van de rotor in de luchtinstroomrichting voor het creëren van het lagedrukgebied in het deeltjescontactgebied.The release and separation device (1) according to any of claims 1-5, comprising: a rotatable drum (27) with a drum wall (28) comprising a drum space (29), the drum being rotatable about a drum rotation axis, wherein, in a section transverse to the drum rotation axis, the drum space comprises: an outlet (30) of the input device, adapted for introducing the particle stream into the drum space during use, wherein, by rotation of the drum in a direction of rotation (31), a substantially oval particle stream (32) is formed moving along a substantially oval particle path in the drum space, a part (33) of the oval particle stream making contact with the drum wall, an outlet (34) of an air blower arranged for blowing air inside the oval particle stream in a direction towards an upper part (35) of the oval particle stream that does not make contact with the drum wall, for blowing the particles of the ee rst fraction outside the oval particle stream to form a first fraction particle stream (36), the rotor disposed outside the oval particle stream and arranged lower than the first fraction particle stream to receive the first fraction particle stream in the particle contact area, the axis of rotation of the rotor is parallel to the drum rotation axis and the direction of rotation of the rotor is opposite to the direction of rotation of the drum, whereby in the particle contact area the particles of the first-fraction particle stream are hit by the rotor blades to be propelled back to the oval particle stream, the airflow generator, positioned outside the oval particle stream and adapted to generate the air stream in use toward the upper part of the rotor in the air inflow direction to create the low pressure area in the particle contact area. 10. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 9, waarbij de luchtstroomgenerator is ingericht voor het tijdens gebruik genereren van de luchtstroom in de richting van het bovendeel van de rotor in de luchtinstroomrichting door middel van zuiging (16) gecreëerd in een stroomafwaarts gebied van de rotor.A release and separation device (1) according to claim 9, wherein the air flow generator is adapted to generate the air flow in use toward the upper part of the rotor in the air inflow direction by suction (16) created in a downstream region of the rotor. 11. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 9 of 10, waarbij boven de rotor een trechtervormig lichaam (37) is aangebracht met een boveneind (38) met een eerste binnendiameter voor het ontvangen van de eerste-fractiedeeltjesstroom en een benedeneind (39) voor het afvoeren van de eerste-fractiedeeltjesstroom met een tweede binnendiameter, waarbij de eerste binnendiameter groter is dan de tweede binnendiameter.A release and separation device (1) according to claim 9 or 10, wherein a funnel-shaped body (37) is provided above the rotor with an upper end (38) having a first inner diameter for receiving the first fraction particle stream and a lower end (39) for discharging the first fraction particle stream with a second inner diameter, the first inner diameter being larger than the second inner diameter. 12. Vrijmaak- en scheidingsinrichting (1) volgens conclusie 9, 10 of 11, waarbij stroomafwaarts van de rotor een stromingsgeleidingslichaam (40) is aangebracht, dat zich uitstrekt tussen de rotor en een trommelwandgebied (41) waar de ovale deeltjesstroom contact maakt met de trommelwand, waarbij een bovendeel van het stromingsgeleidingslichaam is ingericht voor het geleiden van een benedendeel (42) van de ovale deeltjesstroom van de rotor naar het trommelwandgebied.A release and separation device (1) according to claim 9, 10 or 11, wherein a flow guide body (40) is arranged downstream of the rotor, which body extends between the rotor and a drum wall area (41) where the oval particle stream makes contact with the drum wall, wherein an upper part of the flow guide body is adapted to guide a lower part (42) of the oval particle stream from the rotor to the drum wall area. 13. Vrijmaak- en scheidingsinrichting (1) volgens een van de conclusies 10-12, wanneer afhankelijk van conclusie 10, waarbij de luchtstroomgenerator (12) is uitgevoerd om de zuiging (16) gecreëerd in het stroomafwaartse gebied van de rotor te gebruiken om stofdeeltjes weg te zuigen.A release and separation device (1) according to any of claims 10-12, when dependent on claim 10, wherein the air flow generator (12) is arranged to use the suction (16) created in the downstream region of the rotor to collect dust particles to suck away.
NL2013001A 2014-06-16 2014-06-16 Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor. NL2013001B1 (en)

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NL2013001A NL2013001B1 (en) 2014-06-16 2014-06-16 Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor.
PCT/NL2015/050440 WO2015194949A1 (en) 2014-06-16 2015-06-16 Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor
EP15736321.9A EP3154715B1 (en) 2014-06-16 2015-06-16 Liberation and separation device comprising a rotor and an airflow generator for creating a low pressure zone in a particle contact area of the rotor

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CN107971232B (en) * 2016-10-21 2023-09-01 乐山新天源太阳能科技有限公司 Classifying device for powdery materials
EP3492186A1 (en) * 2017-12-04 2019-06-05 Hauni Maschinenbau GmbH Sorter in the tobacco industry and method of sorting substantially flat and lightweight articles
CN112089090B (en) * 2020-10-10 2024-01-19 云南中烟工业有限责任公司 Device and method for separating light and thin sheet-shaped cut stems by using material throwing roller

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AU7677287A (en) 1986-08-11 1988-02-18 Reginald Vernon Dutschke Improvements in particle separators
DE9306556U1 (en) * 1993-04-30 1993-10-07 Höma Maschinenbau GmbH & Co. KG, 48477 Hörstel Device for separating objects
US20020175113A1 (en) 1998-05-22 2002-11-28 Hannu Tahkanen Method and apparatus for sorting of chips
WO2007119254A1 (en) * 2006-04-18 2007-10-25 Sgm Gantry S.P.A. Ballistic separator
EP1970130B1 (en) * 2007-03-15 2011-10-05 Machinefabriek Bollegraaf Appingedam B.V. Apparatus and method for separating plastic film from waste
WO2012150250A1 (en) 2011-05-03 2012-11-08 Bühler AG Device and method for separating feedstock into at least one light material fraction and a heavy material fraction
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