• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    GRANULATED CONDITIONER. The present invention relates to a granulated material conditioner, for optimizing the grain size of the granulated material, comprising two discs (1, 2), rotating with each other and arranged in a substantially mutually parallel relationship, an inlet of granulated material, through which the granulated material can be passed into the conditioner and into an annular gap (7) between the two discs, and a collection vessel (10) for receiving the granulated material, emitted from the gap between the two discs by the action of centrifugal force. According to the present invention, it is proposed that the collection container (10) has an elastic curtain (11), whereby the elastic curtain is spaced at least towards the portion from the collection container and limits the trajectory of the granular material that comes from the gap.
    公开号:BR112015019334B1
    申请号:R112015019334-0
    申请日:2014-03-18
    公开日:2021-05-25
    发明作者:Stefan Münkel；Andreas Seiler；Stefan Gerl
    申请人:Maschinenfabrik Gustav Eirich Gmbh & Co. Kg；
    IPC主号:
    专利说明:

    [001] The present invention relates to a granulated material conditioner, to optimize the grain size of a granulated material.
    [002] Particularly in technical ceramics, ceramic granulated materials with a high flow capacity are required. Therefore, the size of the grades must be within a pre-determined range of grain size. Granulated materials, either with excessively large grade size or excessively small grade size, are often undesirable.
    [003] The process for the production of granulated materials in technical ceramics most frequently found is spray drying (spray). For this purpose, fine powders are mixed with liquid to form a suspension. Then, they are granulated in a spray dryer, that is, the suspension is atomized by means of a nozzle system or centrifugal discs in a hot atmosphere. The resulting drops are dried in a drying room with hot air blown in counter-flow with the drops. The particles contained in the droplets agglomerate and form granular materials. The residual moisture and size distribution of granular material can be influenced inter alia based on the nozzle geometry. The advantage of this decades-old process lies in the high efficiency of the granular material - in the range of 100 to 800 µm. The advantage lies in the large amount of liquid required for the spraying operation, which first has to be supplied with solids and then has to be almost completely dried again.
    [004] An alternative process for the production of granular materials is called "agglomeration by growth". In this process, the starting materials are fed as powdered particles to a mixer. After the addition of water and possibly organic binders, agglomerates or granular materials are formed by the mixing motion.
    [005] Growth agglomeration is remarkably more economically advantageous, but results in a worse grain size distribution when large granules form very quickly with diameters remarkably above 100 µm. The granular material therefore has to be processed.
    [006] Granulated material conditioners are well known, for example from EP 1 070 543, with which the grain size of the granulated material can be reduced. They have an element that is rotatable relative to a stationary housing, the rotatable element having portions shaped like the surface of a cone. Between the cone surface shaped portions and the stationary housing, a gap is formed which conically extends in cross section because of different cone angles. The granular material particles to be processed pass through the gap, where they are fragmented. The outlet clearance is arranged very close to the housing wall.
    [007] When using granulated materials in technical ceramics, and in particular with respect to granulated materials produced by growth agglomeration, therefore, generally comprising a moisture content between 10% and 15% immediately after production, often it occurs in granulated material conditioners, in particular in the ejection zone and stationary housing, that large agglomerates and lumps adhere and are reformed, and such agglomerates and lumps severely adversely affect the quality of the optimized granulated material.
    [008] Disc machines are also known, which use two discs, which are rotatable with each other, and are arranged in a substantially mutually parallel relationship with a tooth disposed on the upper side, where the material to be ground is introduced into a gap substantially annul between the two discs. Due to the relative rotary motion, where generally one of the two discs remains stationary while the other of the two discs rotates around its axis, the material to be ground is ground in the gap by the shearing action of the tooth. Such disc machines cannot be used to condition agglomerates by growth or granular materials as the spaces between the teeth become tacky by moisture and the particles and machine become clogged. A typical area of use for these machines is the polishing of dry mineral raw material, plastic material, or paper suspension.
    [009] The use of these machines is also possible for granulated materials for technical ceramics, and in particular for granulated materials that have been produced by growth agglomeration and which therefore generally have a freely mobile moisture of between 10% and 15 %, immediately after production.
    [0010] The two disks of the disk machines are arranged in a housing that generally closely surrounds the disks, to receive the material emitted from the gap between the two disks by the action of centrifugal force. In other words, the starting components are ground by the relative movement of the two discs in the gap existing between the two discs, and are thrown out by the action of centrifugal force, towards the wall of the collection vessel.
    [0011] If such a disc machine is used to process granulated materials, then the granulated material emitted from the polishing discs remains adhered to the rigid wall of the housing, which, as an end result, means that the granules of the granulated material form lumps , impairing the quality of the granular material coming out of the disc machine again.
    [0012] From the described state of the art, therefore, the objective of the present invention is to provide a conditioner of granulated material, through which granulated materials, produced with a granulated mixer from fine powders with addition of a liquid having a moisture content in the range of about 10% to 15% can be processed.
    [0013] According to the present invention, this objective is achieved with a conditioner of granular material of similar structure to a disk machine, say, comprising two rotating disks between them, and arranged in a substantially mutually parallel relationship, being that a granulated material inlet through which the granulated material can pass to the conditioner for an annular gap between the two discs, and a collecting vessel for receiving the granulated material coming from the gap between the two discs by centrifugal force. However, it should be noted that the collection container is provided with an elastic curtain spaced at least in the portion direction from the collection container and arranged so as to limit the trajectory of the granular material emitted from the gap.
    [0014] In other words, an elastic material is suspended in the collection container, so that granular materials emitted from the annular gap by the action of centrifugal force impact the elastic curtain. With the curtain within a certain spacing, relative to the wall of the collection vessel, the curtain can move correspondingly, whereby the probability of the granular material adhering to the elastic curtain is remarkably reduced. In principle, the curtain can be formed from any elastic material, in particular from any polymeric material, in particular from any elastomer. The elastic curtain particularly preferably comprises polyurethane.
    [0015] In a preferred embodiment, the elastic curtain is arranged completely surrounding the pair of discs. This gives the advantage that the granular material emitted substantially over the entire periphery of the disk reaches the elastic curtain, and from there it generally falls without adhering to the collection vessel.
    [0016] It has been found that the curtain should advantageously have a bell-shaped modality. In this case, the curtain adheres to one of the two discs as much as possible along the entire periphery.
    [0017] In this regard, in a preferred embodiment, the shape of the elastic curtain is such that the elastic curtain includes an angle between 15° and 75°, preferably between 25° and 65°, and better between 35° and 45° with an imaginary radial extension of the annular clearance. The result of this is that the balls of granular material from the annular gap impact the elastic curtain at substantially the same angle.
    [0018] More specifically, it has been found that an excessively large impact angle cannot prevent the granular material from adhering to the elastic curtain. On the contrary, at an excessively small impact angle, the collection vessel has to be remarkably large, which increases costs without, however, bringing any additional benefit.
    [0019] In a preferred embodiment, the elastic curtain has an S-shaped cross section, say a concave region closer to the gap and a convex region adhered to the concave region. Preferably, an imaginary radial extension of the annular gap intersects the elastic curtain substantially in the vicinity of the connection between the concave region and the convex region.
    [0020] It has further been found that the elastic curtain is substantially smooth at least on the side towards the gap, say, without any button, groove or rib. In an additionally preferred embodiment, both discs are rotatable about their axes. This measure has been found to prevent possibly wet granular material from adhering or clogging between the discs, say within the annular gap. If both disks rotate, those disks can be moved at different speeds. The direction of rotation of the rotating discs in this case can be either in the same direction or in the opposite direction.
    [0021] In a preferred embodiment, the disc has a central opening, through which the granular material can be supplied. For example, the disc having the central opening can be rotated by the hollow shaft, through which the granulated material can be supplied to the gap through the central opening.
    [0022] For example, the two disks can be oriented horizontally. In this case, the disc 3 must have a central opening, through which the granulated material can be supplied to the gap by centrifugal force.
    [0023] To allow adjustment of the size of the granular material, a preferred embodiment provides a device for adjusting the width of the gap. In a particularly preferred embodiment, the adjustable disk is mounted adjustablely via three mounting points so that in addition to the clearance width it is also possible to adjust the parallelism of the disks to each other, with individual adjustment of the mounting points.
    [0024] If, nevertheless, the granular material still adheres to the annular clearance, a preferred embodiment provides a pivot device, through which a disk, preferably the upper disk, can be pivoted about a pivot axis extending parallel to the plane. slack to ensure access to the slack. The adhered material can then be removed, allowing the conditioner to return to operating condition.
    [0025] It is an additional advantage that the discs are substantially smooth on their clearance-forming surfaces. Because the discs do not have any tooth arrangement, the risk of deposit formation is further reduced.
    [0026] This is a further particularly preferred embodiment in which the granular material conditioner is arranged in the same housing as the granulate mixer. The two components together form an apparatus for producing an optimized granular material.
    [0027] Advantages and additional components and possible uses of the present invention will be apparent from the following description of a preferred embodiment together with the accompanying drawings, where: Figure 1 is a diagrammatic view of the operating principle of the conditioning device, and Figure 2 shows a cross-sectional view through a part of a conditioner according to the invention.
    [0028] Figure 1 schematically shows the operating principle of the conditioner according to the invention. The conditioner has two rotating discs 1, 2 that are moved so that they rotate with each other. In an illustrated example, the two disks rotate in different directions. An annular gap 7 remains between the two disks. The upper disk 2 is moved by means of the hollow shaft 4, through which the granulated material to be optimized can be fed. The lower disc 1 has in its center a central cone 5 and a row of vanes 6. The granular material which is passed through the hollow shaft 4 between the discs under the effect of centrifugal force is moved radially outwards by the cone 5 and vanes 6, so as to be transported to the annular clearance 5 by the force of radial acceleration. In the gap, the granular material is shredded until it is emitted again from the annular gap 7 by its periphery.
    [0029] It will be seen that the annular gap 7 has a conically converging portion, which is radially additionally disposed inward and a portion in which the gap remains substantially constant and which adheres to the conically converging portion so as to be radially additionally disposed outward .
    [0030] The granulated material is fragmented in the conically converging portion, so that the granulated material can be subsequently rolled in the radially joined gap portion outwardly of a substantially constant gap width. Alternatively, it is possible to provide a plurality of converging portions conically.
    [0031] The discs shown in Figure 1 are typically mounted in a collection vessel.
    [0032] Figure 2 shows an embodiment of the present invention. The conditioner is shown here in cross section. As far as possible, the same references are used equivalent to Figure 1. Here also the granular material can be supplied by hollow shaft 4. Lower disk 1 is moved by shaft 8, while upper disk 2 is moved by hollow shaft 4. Granular material is fragmented in the annular gap 7 and radially accelerated by the rotating disc so that it is emitted from the annular gap 7 at the periphery at a non-negligible speed. In known conditioners, the emitted granulated material impacts the housing wall which closely surrounds the ejection gap, and from there it is conveyed towards the granulated material discharge, for example by means of rotary take-off fingers.
    [0033] Particularly when the granular material has an average moisture content, however, it may happen that the granular material emitted from the annular gap 7 at high speed will adhere to a wall of the housing, so that the accumulation of granular material formed at this location, detaches from the wall in an uncontrolled manner. The parts that stick out comprise small grains of granular material that stick together and cannot be used for further processing.
    [0034] Therefore, the conditioner according to the invention has an elastic curtain 11 arranged so that the grains of granular material emitted from the annular gap 7, first reach the elastic curtain 11. The elastic curtain 11 has a mode in bell-shaped in the preferred embodiment is arranged spaced apart from a wall of the collection container 10, so that, on impact of granular materials, the elastic curtain is caused to oscillate, causing the likelihood of a granular material still remaining adhered to the elastic curtain is remarkably reduced. However, the probability of individual grains of granular material adhering to a curtain can also not be excluded here. Therefore, the curtain is arranged so that the grains emitted from the annular gap hit the elastic curtain 11 at substantially an impact angle between about 40° and 50°. This gives the advantage that a grain of granular material already adhering to the elastic curtain 11 is not pressed against the elastic curtain with the impact of an additional grain, but instead displaced from it by the impact of the subsequent particle. Which usually has the effect of the grain adhering to a curtain detaching and being thrown into the collection vessel 9.
    [0035] In the particularly preferred mode, the elastic curtain has a substantially S-shaped mode, say, it has a concave region and an adjacent convex region, the concave region being arranged closer to the annular gap 7. To the east In this respect, the curtain 11 is arranged so that the granular material emitted from the gap meets the curtain substantially close to the connection between the concave region and the convex region.
    [0036] To provide the ability to adjust the size of the granular material by changing the width of the annular gap 7, one of the rotating discs 1 or 2 is adjustablely mounted with respect to height. The height adjustment of the clearance 12 can be carried out by means of a mounting point or a plurality of mounting points (preferably three) so that in addition to adjusting the clearance width, it is also possible to adjust the parallelism of the discs to each other through an individual adjustment of the mounting points.
    [0037] The peripheral speed of at least one disk must be greater than 10 m/s and preferably greater than 20 m/s. When they spin, that particular disk has a peripheral speed at least 10% greater than the peripheral speed of the other disk. REFERENCE LIST 1 Lower disc 2 Upper disc 3 Granular material 4 Hollow shaft 5 Cone 6 Vane 7 Annular clearance 8 Shaft 9 Collection vessel 10 Collection vessel wall 11 Curtain 12 Clearance height adjustment
    权利要求:
    Claims (14)
    [0001]
    1. Granulated material conditioner for optimizing the grain size of granulated materials, comprising two discs (1, 2) rotatable together and arranged substantially mutually parallel to each other, a granulated material inlet through which the granulated material (3 ) goes into the conditioner and into an annular gap (7) between the two discs (1, 2), and a collection container (9) to receive the granular material (3) emitted from the gap (7) between the two discs (1, 2), by the action of centrifugal force, characterized in that the collection container (9) has an elastic curtain (11), and the elastic curtain (11) is spaced at least partially from the from the wall of the collection container (10) and which limits the trajectory of the granular material (3) emitted from the gap (7), and the elastic curtain (11) is arranged completely surrounding the pair of discs (1, 2).
    [0002]
    2. Conditioner of granulated material, according to claim 1, characterized in that the curtain (11) has a bell-shaped configuration.
    [0003]
    3. Granular material conditioner according to claim 1 or 2, characterized in that the elastic curtain (11) includes an angle between 15° and 75°, preferably between 25° and 65% and the best between 35° at 55°, with an imaginary rotational extension of the annular gap.
    [0004]
    4. Conditioner of granulated material, according to any one of claims 1 to 3, characterized in that the elastic curtain (11) has an S-shaped cross section, say a concave region closer to the gap and a convex region connected to the concave region, with an imaginary radial extension of the annular gap (7) intersecting the elastic curtain (11) substantially in the vicinity of the connection between the concave region and the convex region.
    [0005]
    5. Conditioner of granulated material, according to any one of claims 1 to 4, characterized in that the elastic curtain (11) is substantially smooth on the side directed to clearance, say, without including protrusions, grooves or ribs.
    [0006]
    6. Granular material conditioner according to any one of claims 1 to 5, characterized in that both discs (1, 2) are rotatable around their disc axes.
    [0007]
    7. Granulated material conditioner according to any one of claims 1 to 6, characterized in that the disc (1, 2) has a central opening, through which the granulated material (3) can be supplied.
    [0008]
    8. Granulated material conditioner according to claim 7, characterized in that the disc (1, 2), having a central opening, is moved by means of a hollow shaft (4), with which the granulated material ( 3) can be fed into the gap (7) through the central opening.
    [0009]
    9. Granular material conditioner according to any one of claims 1 to 8, characterized in that a device is provided to adjust the width of the gap, preferably the device must be adapted so that the parallelism of the discs (1, 2) each other can be adjusted with it.
    [0010]
    10. Granular material conditioner according to any one of claims 1 to 9, characterized in that the two discs (1, 2) are oriented horizontally, and preferably a pivoting device must be provided, with which a disc (1, 2), preferably the upper disc (2), can be pivoted about a pivot axis, which extends parallel to the plane of the clearance (7).
    [0011]
    11. Granular material conditioner according to any one of claims 1 to 10, characterized in that the annular gap (7) has one or more portions of conical cross section.
    [0012]
    12. Granular material conditioner according to any one of claims 1 to 11, characterized in that a disk (1, 2) is moved with a peripheral speed greater than 10 m/s, preferably greater than 20 m/s , preferably when both disks (1, 2) are moved, the peripheral speeds of the two disks (1, 2) must be different, and preferably the peripheral speed of one disk (1, 2) must be at least 10% greater than the peripheral speed of the other disk (2, 1).
    [0013]
    13. Conditioner of granulated material, according to any one of claims 1 to 12, characterized in that the discs (1, 2) are substantially flat on the surfaces that form the gap (7).
    [0014]
    14. Apparatus for the production of optimized granulated material (3), characterized in that it comprises a housing in which a mixer is arranged to produce granulated material (3) from powders (and possibly liquids), and a granulated material conditioner as defined in any one of claims 1 to 13.
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    法律状态:
    2018-11-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-24| B07A| Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-04-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-25| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/03/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013103012.2A|DE102013103012A1|2013-03-25|2013-03-25|Granulatkonditionierer|
    DE102013103012.2|2013-03-25|
    PCT/EP2014/055384|WO2014154525A1|2013-03-25|2014-03-18|Granules conditioner|
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