EP2978534B1 - Conditionneur de granulés - Google Patents

Conditionneur de granulés Download PDF

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Publication number
EP2978534B1
EP2978534B1 EP14711493.8A EP14711493A EP2978534B1 EP 2978534 B1 EP2978534 B1 EP 2978534B1 EP 14711493 A EP14711493 A EP 14711493A EP 2978534 B1 EP2978534 B1 EP 2978534B1
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EP
European Patent Office
Prior art keywords
granular material
conditioner according
gap
discs
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14711493.8A
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German (de)
English (en)
Other versions
EP2978534A1 (fr
Inventor
Stefan Münkel
Andreas Seiler
Stefan Gerl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Gustav Eirich GmbH and Co KG
Original Assignee
Maschinenfabrik Gustav Eirich GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of EP2978534A1 publication Critical patent/EP2978534A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/08—Crushing or disintegrating by disc mills with coaxial discs with vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/303—Double disc mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Definitions

  • the present invention relates to a granule conditioner for optimizing grain sizes of granules.
  • the most commonly encountered process for producing granules in engineering ceramics is spray drying.
  • fine powders are mixed with liquid to form a suspension.
  • This is then granulated in a spray dryer, i.
  • the suspension is atomized via a nozzle system or centrifugal discs in a hot atmosphere.
  • the resulting droplets are dried in the dryer room by hot air, which is passed in countercurrent to the droplets.
  • the particles contained in the droplets pool together to form granules.
  • the residual moisture and the granule size distribution can be u.a. influenced by the nozzle geometry.
  • the advantage of this method which has been established for decades, lies in the high granule yield in the range 100-800 ⁇ m.
  • the disadvantage lies in the high volume of liquid required for the spraying process, which first has to be fed to the solid and then almost completely dried out again.
  • An alternative process for the production of granules is the so-called build-up agglomeration.
  • the starting materials are fed as powder particles to a mixer. After the addition of water and possibly organic binders, the mixing movement leads to the formation of agglomerates or granules.
  • the buildup agglomeration is economically much cheaper, but leads to a poorer particle size distribution, as very quickly form large granules with diameters well above 1000 microns. Therefore, a preparation of the granules must be done.
  • Granule conditioners with which the particle sizes of granules can be reduced.
  • These indicate a fixed housing rotatable element with cone-shaped sections on. Between the conical-shaped sections and the stationary housing is a gap which, due to the different cone angles, is conical in cross-section.
  • the granulate particles to be processed are passed through the gap and thereby comminuted.
  • the exit slit is arranged very close to the housing wall.
  • Disc mills are also known which use two disks which are rotatable relative to one another and are arranged essentially parallel to one another with a toothing on the upper side, wherein the millbase is brought into a substantially annular gap between the two disks.
  • the relative rotational movement generally one of the two discs being fixed, while the other disc is rotating about its disc axis, the material to be ground in the gap is ground by the shear on the teeth.
  • Such disc mills can not be used to condition buildup agglomerates or granules, as the interdental spaces stick together due to the moisture and particles and clog the mill.
  • Typical applications of these mill types are the grinding of dry mineral raw materials, plastics or paper suspensions.
  • the two discs of the disc mills are arranged within a housing, which generally encloses the discs, for receiving the material emerging from the gap between the two discs due to the centrifugal force.
  • the starting components are ground by the relative movement of the two discs in the gap formed between the two discs and thrown outwards due to the centrifugal force, so that they hit the wall of the collecting container. If one were to use such a disk mill for the preparation of granules, the granules leaving the grinding disks would adhere to the rigid wall of the housing, as a result This results in that the granules form lumps, so that the quality of the granules leaving the disc mill worsened again.
  • Another granule conditioner for optimizing grain sizes of granules with two rotatable relative to each other, arranged substantially parallel to each other discs according to the preamble of claim 1 is also from the US 2007/029423 A1 known.
  • a granulate conditioner which is constructed similar to a disk mill, i. with two relatively rotatable discs arranged substantially parallel to one another, with a granulate inlet through which granules can be brought into the conditioner in an annular gap between the two discs, and a collecting container for receiving the centrifugal force from the gap between the two Slices of leaking granules.
  • the collecting container has an elastic curtain, which is at least partially spaced from the collecting container wall and is arranged such that it limits the trajectory of the granules emerging from the gap.
  • the elastic process can be formed from any elastic material, in particular from any polymer material, in particular from any elastomer.
  • the elastic curtain is made of polyurethane.
  • the elastic curtain is arranged completely surrounding the pair of discs. This has the advantage that granules which emerge essentially over the entire circumference of the disk strike the elastic curtain and from there usually fall into the collecting container without sticking.
  • the curtain is advantageously bell-shaped.
  • the curtain connects as possible to the entire circumference of one of the two panes.
  • the shape of the elastic curtain is formed in a preferred embodiment such that the elastic curtain with an imaginary radial extension of the annular gap an angle between 15 and 75 degrees, preferably between 25 and 65 Degrees and best between 35 and 45 degrees. This has the consequence that the granules emerging from the annular gap impinge on the elastic curtain at substantially the same angle.
  • the elastic curtain has an S-shaped cross-section, i. a concave portion closer to the gap and an adjoining convex portion.
  • an imaginary radial extension of the annular gap intersects the elastic curtain substantially near the connection between the concave region and the convex region.
  • both disks are rotatable about their disk axis. It has been found that by this measure, sticking of the possibly moist granules between the panes, i. within the annular gap, is avoided. If both discs rotate, they must be driven at different speeds. The direction of rotation of the rotating discs can be either in the same direction or in opposite directions.
  • a disc has a central opening, through which the granules can be supplied.
  • the disk which has the central opening, can be driven by a hollow shaft, through which the granules can be fed via the central opening into the gap.
  • the two discs can be aligned horizontally.
  • the upper disc should have the central opening through which the granules can be fed by gravity into the gap.
  • a device for adjusting the gap width is provided in a preferred embodiment.
  • the adjustable disc is adjustably mounted on three bearing points, so that in addition to the gap width and the parallelism of the discs to each other by individual adjustment of the support points is adjustable.
  • a pivoting device is provided in a preferred embodiment, with the help of a disc, preferably the upper disc, about a pivot axis which is parallel to the gap plane, can be pivoted to access to grant the gap.
  • the adherent material can then be removed and the conditioner is ready for use again.
  • the discs are formed at their the gap forming surfaces substantially flat.
  • the granulation conditioner is arranged in the same housing as a Granuliermischer.
  • the two elements together form a device for producing an optimized granulate.
  • FIG. 1 is shown schematically the operating principle of the conditioner according to the invention.
  • the conditioner has two rotating disks 1, 2 which are driven to rotate relative to each other. In the example shown, the two discs are rotated in different directions. An annular gap 7 remains between the two disks.
  • the upper disk 2 is driven by means of a hollow shaft 4, through which granules to be optimized can be supplied.
  • the lower disc 1 has a central cone 5 and a row of blades 6 in the center.
  • the granules, which is guided via the hollow shaft 4 due to gravity between the discs is moved radially outwards by the cone 5 and the blades 6, so that it is transported into the annular gap 7 due to the radial acceleration. There, the granules are crushed until it exits the circumference of the annular gap 7 again.
  • the annular gap 7 has a tapered portion disposed radially further inward, and a portion in which the gap remains substantially constant, which adjoins the tapered portion so as to be radially outward ,
  • the granules are comminuted, so that the granules can roll in the gap section which adjoins them radially outward with a substantially constant gap width.
  • a plurality of tapered portions could be provided.
  • FIG. 1 Slices shown are usually mounted in a collecting container.
  • FIG. 2 an embodiment of the invention is shown.
  • the conditioner is shown here in a sectional view.
  • the granules can be supplied via the hollow shaft 4.
  • the lower disc 1 is driven via the shaft 8, while the upper disc 2 is driven via the hollow shaft 4.
  • Due to the rotating disks the granules are comminuted in the annular gap 7 and accelerated radially, so that it exits the annular gap 7 at considerable speed on the circumferential side.
  • the exiting granules impinges on the housing wall which tightly encloses the ejection gap and is conveyed from there in the direction of the granulate output, for example by means of rotating clearing fingers.
  • the granules when the granules have a mean moisture, it may happen that the occurring at high speed from the annular gap 7 granules adheres to the housing wall, so that there accumulations of granules form, which can then uncontrollably detached from the wall ,
  • the dissolving pieces consist of adhering granules, which can not be used for further processing.
  • the conditioner according to the invention on an elastic curtain 11, which is arranged such that the emerging from the annular gap 7 granules first meet the elastic curtain 11.
  • the bell-shaped in a preferred embodiment elastic curtain 11 is arranged at a distance from the wall of the collecting container 10 so that it is vibrated upon impact of granules, which causes the probability that granules adhering to the elastic curtain is significantly reduced. Nevertheless, it can not be ruled out here that individual granules can adhere to the curtain. Therefore, the curtain is arranged such that the emerging from the annular gap grains impinge on the elastic curtain 11 substantially with an angle of incidence of about 40 to 50 degrees.
  • the elastic curtain is substantially S-shaped in cross-section, i. it has a concave area, a subsequent convex area, wherein the concave area is arranged closer to the annular gap 7.
  • the curtain 11 is arranged such that the granules leaving the gap strike the curtain substantially in the vicinity of the connection between the concave area and the convex area.
  • one of the rotating disks 1 or 2 is mounted vertically adjustable.
  • the height adjustment of the gap 12 can be done via a support point or over several, preferably three support points, so that in addition to the gap width and the parallelism of the discs is adjustable by individual adjustment of the support points.
  • the peripheral speed of at least one disk should be more than 10 m / s and preferably more than 20 m / s.
  • one disk should have a peripheral speed at least 10% greater than the peripheral speed of the other disk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Glanulating (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (15)

  1. Conditionneur de granulés pour optimiser le calibre de grain de granulés, avec deux disques (1, 2) rotatifs l'un par rapport à l'autre et disposés sensiblement parallèles l'un à l'autre, avec une entrée de granulés par laquelle des granulés peuvent être introduits dans le conditionneur dans une fente (7) de forme annulaire de cercle entre les deux disques, et un contenant de réception (10) pour recevoir les granulés sortant de la fente entre les deux disques sous l'effet de la force centrifuge, caractérisé en ce que le contenant de réception comprend un rideau élastique (11), le rideau étant espacé de la paroi du contenant au moins par zones et limitant la trajectoire des granulés sortant de la fente (7).
  2. Conditionneur de granulés selon la revendication 1, caractérisé en ce que le rideau élastique est disposé de manière à entourer la paire de disques entièrement.
  3. Conditionneur de granulés selon la revendication 2, caractérisé en ce que le rideau présente la forme d'une cloche.
  4. Conditionneur de granulés selon l'une des revendications 1 à 3, caractérisé en ce que le rideau élastique enferme avec une prolongation radiale imagée de la fente de forme annulaire de cercle un angle entre 15° et 75°, de préférence entre 25° et 65° et le mieux entre 35° et 55°.
  5. Conditionneur de granulés selon l'une des revendications 1 à 4, caractérisé en ce que le rideau élastique présente une section transversale en S, c'est-à-dire qu'il comprend une zone concave située plus proche de la fente et une zone adjacente convexe, une prolongation radiale imagée de la fente de forme annulaire de cercle coupant le rideau élastique sensiblement à proximité de la liaison entre la zone concave et la zone convexe.
  6. Conditionneur de granulés selon l'une des revendications 1 à 5, caractérisé en ce que le rideau élastique est formé, sur le côté orienté vers la fente, sensiblement lisse, c'est-à-dire exempt de tétons, de rainures ou de nervures.
  7. Conditionneur de granulés selon l'une des revendications 1 à 6, caractérisé en ce que les deux disques sont rotatifs autour de leur axe de rotation.
  8. Conditionneur de granulés selon l'une des revendications 1 à 7, caractérisé en ce qu'un disque comprend une ouverture centrale par laquelle les granulés sont susceptibles d'être introduits.
  9. Conditionneur de granulés selon la revendication 8, caractérisé en ce que le disque comportant l'ouverture centrale est conçu pour être entraîné par un arbre creux par lequel les granulés sont susceptibles d'être introduits dans la fente via l'ouverture centrale.
  10. Conditionneur de granulés selon l'une des revendications 1 à 9, caractérisé en ce qu'il est prévu un dispositif pour régler la largeur de fente, le dispositif étant conçu de préférence de façon qu'il puisse servir à régler le parallélisme des disques l'un par rapport à l'autre.
  11. Conditionneur de granulés selon l'une des revendications 1 à 10, caractérisé en ce que les deux disques sont orientés horizontalement, un dispositif de pivotement étant prévu de préférence, à l'aide duquel un disque, le mieux c'est le disque supérieur, peut être pivoté autour d'un axe de pivotement s'étendant parallèlement au plan de fente.
  12. Conditionneur de granulés selon l'une des revendications 1 à 11, caractérisé en ce que la fente de forme annulaire de cercle présente une ou plusieurs zones de section transversale conique.
  13. Conditionneur de granulés selon l'une des revendications 1 à 12, caractérisé en ce qu'au moins un disque est entraîné avec une vitesse circonférentielle supérieure à 10 m/s, de préférence supérieure à 20 m/s, où de préférence, lorsque les deux disques sont entraînés, les vitesses circonférentielles des deux disques diffèrent l'une de l'autre et où, de préférence, la vitesse circonférentielle d'un disque est supérieure à la vitesse circonférentielle de l'autre disque d'au moins 10%.
  14. Conditionneur de granulés selon l'une des revendications 1 à 13, caractérisé en ce que les disques présentent à leurs faces formant la fente, une forme sensiblement plate.
  15. Dispositif pour réaliser des granulés optimisés, avec un carter dans lequel sont disposés un broyeur à granuler pour fabriquer des granulés à partir de poudres et, le cas échéant, de liquide, et un conditionneur de granulés selon l'une des revendications 1 à 14.
EP14711493.8A 2013-03-25 2014-03-18 Conditionneur de granulés Active EP2978534B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013103012.2A DE102013103012A1 (de) 2013-03-25 2013-03-25 Granulatkonditionierer
PCT/EP2014/055384 WO2014154525A1 (fr) 2013-03-25 2014-03-18 Conditionneur de granulés

Publications (2)

Publication Number Publication Date
EP2978534A1 EP2978534A1 (fr) 2016-02-03
EP2978534B1 true EP2978534B1 (fr) 2017-05-03

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EP14711493.8A Active EP2978534B1 (fr) 2013-03-25 2014-03-18 Conditionneur de granulés

Country Status (13)

Country Link
US (1) US10843199B2 (fr)
EP (1) EP2978534B1 (fr)
JP (1) JP6283093B2 (fr)
CN (1) CN105050723B (fr)
BR (1) BR112015019334B1 (fr)
DE (1) DE102013103012A1 (fr)
ES (1) ES2631802T3 (fr)
MX (1) MX360215B (fr)
PL (1) PL2978534T3 (fr)
RU (1) RU2657031C2 (fr)
UA (1) UA114559C2 (fr)
WO (1) WO2014154525A1 (fr)
ZA (1) ZA201506148B (fr)

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DE102013103012A1 (de) * 2013-03-25 2014-09-25 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Granulatkonditionierer
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JP7134440B2 (ja) * 2016-07-29 2022-09-12 ９７５４７４１ カナダ エルティーディー． ストリームの中の粒子を単体化する方法および装置
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CN109939776B (zh) * 2019-04-16 2020-12-15 青岛农业大学 中兽药研磨设备
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ZA201506148B (en) 2016-12-21
MX2015013454A (es) 2016-01-14
ES2631802T3 (es) 2017-09-05
BR112015019334A2 (pt) 2017-07-18
CN105050723B (zh) 2017-08-04
CN105050723A (zh) 2015-11-11
EP2978534A1 (fr) 2016-02-03
US10843199B2 (en) 2020-11-24
PL2978534T3 (pl) 2017-09-29
JP6283093B2 (ja) 2018-02-21
WO2014154525A1 (fr) 2014-10-02
RU2657031C2 (ru) 2018-06-08
UA114559C2 (uk) 2017-06-26
RU2015142148A (ru) 2017-04-10
DE102013103012A1 (de) 2014-09-25
BR112015019334B1 (pt) 2021-05-25
MX360215B (es) 2018-10-24
US20150367350A1 (en) 2015-12-24
JP2016517791A (ja) 2016-06-20

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