EP0572610B1 - Procede visant a disperser, melanger ou homogeniser des melanges et dispositif d'application dudit procede - Google Patents

Procede visant a disperser, melanger ou homogeniser des melanges et dispositif d'application dudit procede Download PDF

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Publication number
EP0572610B1
EP0572610B1 EP93900118A EP93900118A EP0572610B1 EP 0572610 B1 EP0572610 B1 EP 0572610B1 EP 93900118 A EP93900118 A EP 93900118A EP 93900118 A EP93900118 A EP 93900118A EP 0572610 B1 EP0572610 B1 EP 0572610B1
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EP
European Patent Office
Prior art keywords
grinding
rotation
wall elements
axis
mixing
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.)
Expired - Lifetime
Application number
EP93900118A
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German (de)
English (en)
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EP0572610A1 (fr
Inventor
Wolf-Dieter Kreuziger
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.)
KREUZIGER WOLF DIETER
Original Assignee
KREUZIGER WOLF DIETER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/25—Mixers with loose mixing elements, e.g. loose balls in a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings

Definitions

  • the invention relates to a process for the continuous dispersing, mixing or homogenizing of solid / liquid and / or liquid / liquid mixtures and to an apparatus for carrying out this process with a disk-shaped or annular space-shaped grinding chamber in which grinding media are arranged.
  • the invention now aims to improve a device of the type mentioned at the outset such that the mixing zone can be substantially enlarged with small structural dimensions and furthermore the possibility is created of homogenization even when substances which are difficult to mix with one another, in particular with solid / liquid mixtures and liquid / liquid mixtures, to achieve a dispersion or an emulsion.
  • the method according to the invention is intended to provide the possibility of effectively counteracting the formation of lumps which may occur in the production of such dispersions and of reliably dividing the smallest size of agglomerations.
  • wet grinding and intensive dispersion are also to be achieved if liquids of relatively high viscosity are used and, in conventional wet grinding processes, the separability of the grinding media from the liquid components is difficult due to the high viscosity.
  • a reliable and simple separation of grinding media should thus succeed at the same time, despite high viscosity, even when grinding media with an extremely small diameter and extremely low density differences are used for the dispersion to be produced.
  • the use of starting materials with a higher viscosity should also make it possible to process concentrates, as a result of which the throughput, for example in the production of dilutable dyes based on synthetic resin pigments, can be significantly reduced.
  • the method according to the invention essentially consists in introducing the dispersion or emulsion to be homogenized into a rotating, disk-shaped or annular space-shaped grinding space, which is at least partially filled with grinding media and is separated by two separately rotatable wall elements which are axially opposed to one another by their inner sides is that the wall elements are driven so that a resulting centrifugal force to the radial
  • the grinding media are separated within the grinding chamber and the dispersion or emulsion to be homogenized is moved or passed through the grinding chamber transversely to the axes of rotation of the wall elements against the direction of movement of the grinding media caused by centrifugal force.
  • a mixing zone is formed between the rotating wall elements by introducing the dispersion or emulsion to be homogenized into a rotating, ring-shaped grinding chamber, which is at least partially filled with grinding media and delimited by two separately rotatable, axially opposite wall elements with their insides axially opposite one another. which overall ensures a relatively large partial area of intensive mixing with small dimensions.
  • the at least partial filling of the grinding chamber with grinding media ensures intensive wet grinding, with an intensive acceleration of the grinding media and mixing taking place at the interface between the rotating areas of the grinding chamber.
  • the separation of the grinding media from the dispersion or the emulsion can thus be substantially improved by the process according to the invention, this improvement being among other things therein lies in the fact that the use of sieves or filters when removing the mixture can be dispensed with, for which purpose the process according to the invention is carried out in such a way that the dispersion or emulsion to be homogenized moves transversely to the axis of rotation (s) of the wall elements through the grinding chamber or is passed through.
  • the partial area of intensive mixing between the rotating partial areas of the grinding chamber or mixing chamber is formed by an annular surface which is essentially normal to the axes of rotation.
  • the division plane and thus the zone of the most intensive mixing can also lie in a surface which corresponds to the lateral surface of a cone.
  • the mixing or swirling depends on the relative speed that exists between adjacent areas of the mixing or grinding room. If the wall surfaces rotate in opposite directions, this relative speed and thus the dispersing action become particularly high, with a total of a resulting centrifugal force in the grinding chamber to separate the grinding media.
  • the method can therefore advantageously be carried out in such a way that the mixing operation is carried out between wall elements rotating relative to one another at different speeds and / or directions of rotation.
  • the axes of rotation of the wall elements which can be rotated relative to one another can be different from one another and run essentially parallel to one another, as a result of which a certain eccentricity of the rotational movement in relation to the interface between the particles rotating relative to one another and thus particularly intensive mixing can be achieved.
  • a flexing effect can also be used to improve the mixing over the entire radial extent of the grinding chamber be achieved.
  • the wall elements can be driven at the same speed and in the same direction of rotation, which means that, despite the slight relative movement between the disks or wall elements and the material to be ground, a total movement of the material to be ground - mixture of grinding media is produced with each revolution. This means that the energy input can take place optimally and there is no risk of local overheating, especially when processing highly viscous masses.
  • the possibility of being able to drive both wall elements at the same speed and still achieve an optimal grinding / mixing effect also means a significant simplification of the overall structure and ultimately improves the centrifugal effect on all grinding media.
  • the process is preferably carried out in such a way that the mixture or grinding media / grinding material mixture is set in rotation at the same rotational speed as the two wall elements, and that the mixing material or the grinding media / grinding material mixture is at least once in each direction in the direction of the axis of rotation and once in Direction is moved away from the axis of rotation.
  • the axes of rotation can, however, also be arranged coaxially to one another without further ado.
  • the method according to the invention is advantageously carried out in such a way that that the dispersion or emulsion to be homogenized is subjected to a shear stress between rotating surfaces on the outside of the wall elements of the grinding chamber before it enters the grinding chamber, such a procedure using a structurally relatively simple device results in additional intensive mixing.
  • a good separation of the grinding media from the dispersed or homogenized mixture without complex separation technology can be achieved in that the dispersion or emulsion to be homogenized is conveyed through the grinding chamber counter to the direction of movement of the grinding media caused by the centrifugal force.
  • Fig.1 only half of the rotationally symmetrical design of the device is shown in section, the entire device resulting from reflection on the common axis of the two wall elements delimiting the grinding chamber.
  • the device for dispersing, mixing or homogenizing solid / liquid or liquid / liquid mixtures consists of a housing, generally designated 1, in which a first wall element 2 in the form of a half-shell is rotatably mounted about an axis of rotation 3 by a drive (not shown in more detail) .
  • the bowl-shaped wall element 2 defines, with a second, also rotatably mounted, bowl-shaped wall element 4, a grinding chamber 5 designed as an annular space, the grinding chamber being indicated by dashed lines in the second half of the drawing by 5 'to illustrate the symmetrical design.
  • the second wall element 4 is also driven to rotate about the axis 3 by a drive, not shown.
  • Storage for the wall element 4 in the housing 1 is indicated by 6.
  • the first rotating wall element 2 is the outside of the second wall element 4 overlapping part 7 non-rotatably connected, as indicated by 8, the bearings for the first wall element 2 or the part 7 connected thereto are indicated by 9 and 10.
  • a shell-shaped wall element 2 is in turn about an axis of rotation 3 by a Drive not shown driven to a rotary motion.
  • a part 7 overlapping the second wall element 4 is connected in a rotationally fixed manner, only the bearings 10 being indicated.
  • the second shell-shaped wall element has a rotation axis 18 which is different from the axis of rotation 3 of the first wall element 2 and which forms an obtuse angle with the axis of rotation 3.

Claims (14)

  1. Procédé visant à disperser, mélanger ou homogénéiser de manière continue des mélanges solides/liquides et/ou liquides/ liquides, caractérisé en ce que la dispersion ou l'émulsion à homogénéiser est introduite dans un espace de broyage (5) à rotation, rempli au moins en partie d'éléments broyeurs (19) et limité par deux éléments de paroi (2, 4) pouvant tourner séparément, opposés axialement par leur faces intérieures, en forme de disque ou d'espace annulaire, en ce que les éléments de paroi sont commandés de telle sorte qu'une force centrifuge résultante se produit à l'intérieur de l'espace de broyage pour la séparation radiale des éléments de broyage et en ce que la dispersion ou l'émulsion à homogénéiser est déplacée ou amenée à travers l'espace de broyage, transversalement aux axes de rotation (3, 18) des éléments de paroi (2, 4), en sens inverse du mouvement des éléments de broyage provoqué par la force centrifuge.
  2. Procédé selon la revendication 1, caractérisé en ce que le mélange ou le mélange élément broyeur - matière à broyer est déplacé à la même vitesse de rotation que les deux éléments de paroi (2, 4) en rotation et en ce que le mélange ou le mélange élément broyeur - matière à broyer est déplacé à chaque rotation au moins une fois en direction de l'axe de rotation (3, 18) et une fois en s'éloignant de l'axe de rotation.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, avant l'entrée dans l'espace de broyage (5), la dispersion ou émulsion à homogénéiser est soumise à une sollicitation au cisaillement entre les surfaces en rotation (13, 14) de la face extérieure des éléments de paroi (2, 4) de l'espace de broyage (5).
  4. Procédé selon l'une quelconque des revendications 1, 2 ou 3, caractérisé en ce que le mélange homogénéisé est retiré par l'intermédiaire d'un canal axial (17).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'espace de broyage (5) est rempli au maximum à 75 % (volume), de préférence à 60 % (volume), d'éléments broyeurs (19) d'un diamètre effectif inférieur à 0,5 mm, de préférence inférieur à 0,1 mm.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'opération de mélange est effectuée entre des éléments de paroi (2, 4) tournant relativement l'un par rapport à l'autre à un nombre de tours et/ou selon un sens de rotation différent l'un de l'autre.
  7. Dispositif d'application dudit procédé selon l'une quelconque des revendications 1 à 6 avec un espace de broyage (5) en forme de disque ou d'espace annulaire, dans lequel sont disposés des éléments broyeurs (19), caractérisé en ce que l'espace de broyage (5) est limité par deux éléments de paroi (2, 4) opposés axialement par leur faces intérieures et pouvant tourner séparément et en ce que l'espace de broyage (5) présente au moins un orifice d'alimentation et/ou un orifice de dérivation (15, 16, 17) sur ses faces tournées vers et opposées à (aux) l'axe (axes) de rotation (3, 18).
  8. Dispositif selon la revendication 7, caractérisé en ce que les orifices d'alimentation et de dérivation (15, 16) sont constitués de fentes s'étendant sur le pourtour de l'espace de broyage (5).
  9. Dispositif selon la revendication 8, caractérisé en ce que les fentes (15, 16) se situent sur un plan de partage de l'espace de broyage (5), ce plan étant commun et en substance vertical normalement sur l'axe (les axes) de rotation (3, 18) des éléments de paroi (2, 4).
  10. Dispositif selon l'une quelconque des revendications 7, 8 ou 9, caractérisé en ce que l'espace de broyage limité par les éléments de paroi (2, 4) de l'espace de broyage (5) est réalisé de façon à se réduire dans la section transversale en un plan transversal comportant au moins un axe de rotation (3, 18), transversalement à cet axe de rotation.
  11. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que les éléments de paroi (2, 4) sont formés de semi-monocoques montées à rotation autour d'un axe commun (3) et assemblées avec des commandes séparées.
  12. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que les axes de rotation (3, 18) des éléments de paroi (2, 4) sont disposés en étant relativement inclinés l'un vers l'autre et sont associés l'un à l'autre en formant un angle obtus.
  13. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que l'angle entre les axes de rotation (3, 18) des éléments de paroi (2, 4) est réglable de manière continue.
  14. Dispositif selon l'une quelconque des revendications 7 à 13, caractérisé en ce qu'un élément de paroi (2) est assemblé de manière fixe avec une partie (7) recouvrant le deuxième élément de paroi (4) en formant une fente (12) et en ce que l'alimentation (11) débouche dans cette fente (12).
EP93900118A 1991-12-20 1992-12-21 Procede visant a disperser, melanger ou homogeniser des melanges et dispositif d'application dudit procede Expired - Lifetime EP0572610B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT2546/91 1991-12-20
AT254691 1991-12-20
PCT/AT1992/000172 WO1993012871A1 (fr) 1991-12-20 1992-12-21 Procede visant a disperser, melanger ou homogeniser des melanges et dispositif d'application dudit procede

Publications (2)

Publication Number Publication Date
EP0572610A1 EP0572610A1 (fr) 1993-12-08
EP0572610B1 true EP0572610B1 (fr) 1996-09-18

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EP93900118A Expired - Lifetime EP0572610B1 (fr) 1991-12-20 1992-12-21 Procede visant a disperser, melanger ou homogeniser des melanges et dispositif d'application dudit procede

Country Status (9)

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EP (1) EP0572610B1 (fr)
JP (1) JPH06505437A (fr)
KR (1) KR930703064A (fr)
AT (1) ATE142902T1 (fr)
CA (1) CA2104388A1 (fr)
DE (1) DE59207190D1 (fr)
DK (1) DK0572610T3 (fr)
ES (1) ES2094520T3 (fr)
WO (1) WO1993012871A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024085B (zh) * 2020-08-26 2022-03-25 怀化秦湘油业有限公司 一种针对块状化妆品原料颗粒的搅拌研磨装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US882646A (en) * 1907-06-21 1908-03-24 Wycliffe Eustace Murray Machine for making chocolate.
JPS5926129A (ja) * 1982-08-05 1984-02-10 Konishiroku Photo Ind Co Ltd 分散液滴の製造装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 4, Nr 135, C-25, Zusammenfassung von JP, 55-86526 (FUJITSU K.K.), 30. Juni 1980 *
Patent Abstracts of Japan, vol. 4, nno. 135, C-25, abstract of JP,A, 55-86526 (FUJITSU K.K.), 30 June 1980 (30.06.80) *

Also Published As

Publication number Publication date
DE59207190D1 (de) 1996-10-24
ES2094520T3 (es) 1997-01-16
EP0572610A1 (fr) 1993-12-08
DK0572610T3 (fr) 1997-03-10
CA2104388A1 (fr) 1993-06-21
JPH06505437A (ja) 1994-06-23
KR930703064A (ko) 1993-11-29
WO1993012871A1 (fr) 1993-07-08
ATE142902T1 (de) 1996-10-15

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