EP0832682A1 - Apparatus for homogenizing and dispersing liquid phases - Google Patents

Apparatus for homogenizing and dispersing liquid phases Download PDF

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Publication number
EP0832682A1
EP0832682A1 EP97890194A EP97890194A EP0832682A1 EP 0832682 A1 EP0832682 A1 EP 0832682A1 EP 97890194 A EP97890194 A EP 97890194A EP 97890194 A EP97890194 A EP 97890194A EP 0832682 A1 EP0832682 A1 EP 0832682A1
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EP
European Patent Office
Prior art keywords
rotor
plate
stator
mixing
container
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.)
Ceased
Application number
EP97890194A
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German (de)
French (fr)
Inventor
Walter Ing. Hoffmann
Leopold Ing. Arnberger
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JM Voith AG
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JM Voith AG
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Publication date
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Publication of EP0832682A1 publication Critical patent/EP0832682A1/en
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Classifications

    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2714—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator the relative position of the stator and the rotor, gap in between or gap with the walls being adjustable
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/40—Mixers with shaking, oscillating, or vibrating mechanisms with an axially oscillating rotary stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/98—Cooling

Definitions

  • the invention relates to a device for homogenizing and dispersing liquid phases or solids in liquids with a mixing tank and one as a rotor trained mixing tool which rotates around an axis and slidably supported in the direction of its axis and with a Drive is connectable.
  • Viscosity are usually discontinuous processes applied to which pre-dosed components in a container mixed in for the time being using slowly running mixing tools and then dispersed using high-speed dispersing tools and be homogenized.
  • An essential difficulty in this process all the points of the mixing container with the same intensity.
  • the mixing tools are used for example in planetary dissolvers thanks to a complex drive system in the mixing tank to move about their own mixing tool axis over the Cross section of the mixing container moves.
  • Known mixing units with partially movable dissolver disks equipped to the solid or after homogenizing finely disperse liquid additives There are also facilities known in which the content of the mixing container by an external circulation pump by a dispersing unit is promoted.
  • a mixing unit is already known from EP-B1 0 196 291 become, in which a mixing vessel in a bottom part and a cover part is divided. There is one in the cover part Press plate tightly guided. Extends through the press plate a mixing tool designed as a rotor, which along its Axis of rotation is guided axially displaceably in the mixing container. The mixing process is carried out exclusively by the mixing tool accomplished, and the press plate sealingly guided in the cover part is used for the subsequent discharge of the mixed material and thus easier emptying of the container.
  • the invention now aims to establish the beginning mentioned type in that the mixing and Disperse even with low to medium viscosity liquids completely successful within a short time and a homogeneous Mixed phase is formed.
  • the invention aims in particular depends on the homogenization even with difficult to disperse Improve media with a short mixing time.
  • the object of the device according to the invention is essentially in that one together with the rotor in the direction of the axis slidable, plate-shaped element is provided, which forming a gap essentially parallel to Extends the plane of rotation of the rotor and has openings, that the plate-shaped element on the inner wall of the Sealing container or with the formation of a throttle cross section is performed and that the plate-shaped element in secured its rotational position or with the rotational speed of the rotor at different speeds and / or directions of rotation at an adjustable axial distance from the rotor with a Drive for an axial stroke is connected.
  • the design must exert a certain amount of exercise on the material to be dispersed just be chosen so that the rotor blades are not coaxial to the axes of the perforations of the plate-shaped Rotate element so that a corresponding radial path through the slot between the plate-shaped element and the rotor is enforced.
  • the training according to the invention is advantageously made such that the plate-shaped element is designed as a stator and in its an end wall, in particular a cover plate of the container adjacent position for rotation to clear the end wall is drivable, which is a particularly simple and reliable construction results.
  • Deviating from known ones Planetary dissolvers can do that with a much simpler drive Satisfaction can be found, taking the measure that is in operation plate-shaped element designed as a stator only in to drive a final position serves the end wall and in particular the wall of the cover plate facing the container to clear safely, so that the cleaning effort essential is reduced.
  • the device according to the invention can advantageously be used in different ways substances to be dispersed, for which the Training is advantageously taken so that the axial distance of the stator from the rotor by an oscillating stroke drive in Operation is adjustable.
  • the training is advantageously made such that the rotor and / or the stator are connected to an ultrasound transmitter is.
  • the mix can be pre-metered in a mixing container in a simple manner for which, for example, fine, powdery solids are applied to a liquid can, whereupon the mixing container with the rotor and is connected to the stator.
  • the training is particularly special easily taken so that the mixing container detachably with a bearing for the rotor shaft and / or the axially displaceable Cover plate with stator for closing of the mixing container is connected.
  • a particularly simple construction of the device according to the invention can be realized in that the rotor on Stator is rotatably mounted. In this way, the storage effort much simplified.
  • Another measure of sensitive mix safely without change homogenize and disperse the material properties exists as it corresponds to a preferred further training in that the mixing container is provided with a cooling jacket is.
  • FIG. 1 shows a schematic representation of the a lid of the mixing container closed at the beginning of the mixing and dispersing process
  • Figure 2 with a first operating position a first predefined gap width
  • FIG. 3 a further one Operating state of the device according to the invention with changed Gap width between rotor and stator.
  • 1 denotes a mixing container, which of is surrounded by a cooling jacket 2.
  • the cooling medium can Connections 3 and 4 are fed in and out.
  • the material to be mixed is first in predosed amount introduced, with 5 the liquid phase and 6 denotes a powder phase.
  • a sliding bearing 8 is provided, via which the mixing tools is guided in their axial stroke.
  • the mixing tool comprises a rotor 9 which through a rotor shaft 10 for Rotation in the direction of arrow 11 can be driven.
  • the drive motor is conventional and for the sake of simplicity not shown.
  • the rotor shaft 10 is arranged concentrically with a quill 12 and rotatably supported via bearing 13 in this.
  • the quill 12 is rotatably connected to a plate-shaped element 14, which has openings 15.
  • a plate-shaped element 14 Between the rotor 9 and a gap 16 is formed in the plate-shaped element 14, the rotor 9 and the plate-shaped element 14 in the sense of Double arrow 17 in the axial direction together or relatively are displaceable to each other.
  • the plate-shaped element 14 can with such a stroke in the direction of the double arrow 17 against Be secured against rotation or with a separate or Rotary drive derived from the rotary drive of the rotor shaft 10 different rotational speed to be driven to rotate.
  • the quill is now used to mix and disperse the material 12 and thus the plate-shaped element 14 and the rotor 9 in the medium to be mixed is lowered, the medium from the rotor 9 detected and through the gap 16 and the openings 15 of the plate-shaped element is conveyed through. Between the plate-shaped element 14 and the rotor 9, the material is on Shear stresses, so that an intensive mixing in the gap 16 takes place. This working position of the mixing tools is in Fig.2 can be seen.
  • the axial gap width can vary depending on the medium to be dispersed of the gap 16 here during the stroke in the sense of the double arrow 17 can be kept constant or changed during operation will. As can be seen in FIG. 3, this gap 16 can be widened be, with a particularly intensive mixing and Dispersion can be achieved in that the plate-shaped Element 14 in the direction of the double arrow 17 relative to axial stroke of the rotor 9 is driven to oscillate, so that a cyclical increase and decrease in the gap width a des Gap 16 is achieved.
  • the openings 15 the plate-shaped element 14 can optionally be closed, to the at an upward push of the plate-shaped element to spread all mixed material safely.
  • the plate-shaped element 14 can have a circumference Seal 19 sealed against the inner wall of the container 1 will. Instead of such a seal 19, however, a Throttle gap are formed, which should be dimensioned must actually be the essential part of the subject to be treated Medium is promoted through the gap 16 and not free at the Can pass through the outer edge of the plate-shaped element 14.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The unit homogenises and disperses fluid phases or suspensions. The mixing vessel (1) contains a mixing tool and a rotor (9) which can be moved along its axis and is connected to a drive. A plate, (14) moving axially with the rotor, forms a parallel shear gap (16). The plate includes passages (15). It is sealed against or forms a constriction with the internal wall of the vessel (1). The plate is fixed in location or connected to an axially-stroking drive altering its clearance from the rotor, at varying rotor speed and direction.

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Homogenisieren und Dispergieren von flüssigen Phasen oder von Feststoffen in Flüssigkeiten mit einem Mischbehälter und einem als Rotor ausgebildeten Mischwerkzeug, welches um eine Achse rotierbar und in Richtung seiner Achse verschiebbar gelagert und mit einem Antrieb verbindbar ist.The invention relates to a device for homogenizing and dispersing liquid phases or solids in liquids with a mixing tank and one as a rotor trained mixing tool which rotates around an axis and slidably supported in the direction of its axis and with a Drive is connectable.

Für die Herstellung von Dispersionen mit niedriger oder mittlerer Viskosität werden üblicherweise diskontinuierliche Verfahren angewandt, bei welchen vordosierte Komponenten in einem Behälter vorerst mittels langsam laufender Mischwerkzeuge eingemischt und anschließend durch schnell laufende Dispergierwerkzeuge dispergiert und homogenisiert werden. Eine wesentliche Schwierigkeit bei diesem Verfahren besteht darin, alle Stellen des Mischbehälters mit gleicher Intensität zu erfassen. Aus diesem Grunde werden die Mischwerkzeuge beispielsweise bei Planetendissolvern durch ein aufwendiges Antriebssystem im Mischbehälter zusätzlich zu ihrer Bewegung um ihre eigene Mischwerkzeugachse über den Querschnitt des Mischbehälters bewegt. Darüber hinaus sind bekannte Mischaggregate mit zum Teil beweglichen Dissolverscheiben ausgerüstet, um nach dem Homogenisieren die festen oder flüssigen Zusatzstoffe feinst zu dispergieren. Es sind auch Einrichtungen bekannt, bei welchen der Inhalt des Mischbehälters durch eine externe Umwälzpumpe durch ein Dispergieraggregat gefördert wird.For the production of dispersions with low or medium Viscosity are usually discontinuous processes applied to which pre-dosed components in a container mixed in for the time being using slowly running mixing tools and then dispersed using high-speed dispersing tools and be homogenized. An essential difficulty in this process, all the points of the mixing container with the same intensity. For this reason the mixing tools are used for example in planetary dissolvers thanks to a complex drive system in the mixing tank to move about their own mixing tool axis over the Cross section of the mixing container moves. Beyond that Known mixing units with partially movable dissolver disks equipped to the solid or after homogenizing finely disperse liquid additives. There are also facilities known in which the content of the mixing container by an external circulation pump by a dispersing unit is promoted.

Alle bekannten Einrichtungen erlauben keinen gezielten Durchlauf des Mediums durch die Misch- bzw. Dispergierwerkzeuge und es erfolgt eine lediglich statistische Erfassung des Mediums, wodurch für einen guten Dispergiereffekt eine entsprechend lange Mischzeit erforderlich wird. Durch die komplizierte Form der Mischwerkzeuge und den relativ großen Abstand der Mischwerkzeuge von den Behälterwänden gestaltet sich auch die Entleerung der Mischaggregate schwierig und unvollständig, sodaß eine aufwendige Reinigung erforderlich ist. All known devices do not allow a targeted run of the medium through the mixing or dispersing tools and it the medium is only recorded statistically, which means a correspondingly long time for a good dispersion effect Mixing time is required. Due to the complicated shape of the Mixing tools and the relatively large distance between the mixing tools emptying of the container walls is also possible Mixing units difficult and incomplete, so that a complex Cleaning is required.

Aus der EP-B1 0 196 291 ist bereits ein Mischaggregat bekannt geworden, bei welchem ein Mischgefäß in einen Bodenteil und einen Deckelteil unterteilt ist. Im Deckelteil ist hier eine Preßplatte dicht geführt. Durch die Preßplatte erstreckt sich ein als Rotor ausgebildetes Mischwerkzeug, welches längs seiner Rotationsachse axial verschieblich im Mischbehälter geführt ist. Der Mischvorgang wird ausschließlich durch das Mischwerkzeug bewerkstelligt, und die im Deckelteil dichtend geführte Preßplatte dient dem anschließenden Ausbringen des gemischten Gutes und damit einer leichteren Entleerung des Behälters.A mixing unit is already known from EP-B1 0 196 291 become, in which a mixing vessel in a bottom part and a cover part is divided. There is one in the cover part Press plate tightly guided. Extends through the press plate a mixing tool designed as a rotor, which along its Axis of rotation is guided axially displaceably in the mixing container. The mixing process is carried out exclusively by the mixing tool accomplished, and the press plate sealingly guided in the cover part is used for the subsequent discharge of the mixed material and thus easier emptying of the container.

Die Erfindung zielt nun darauf ab, Einrichtungen der eingangs genannten Art dahingehend weiterzubilden, daß das Mischen und Dispergieren auch bei niedrig- bis mittelviskosen Flüssigkeiten innerhalb kurzer Zeit vollständig gelingt und eine homogene Mischphase ausgebildet wird. Im besonderen zielt die Erfindung darauf ab, die Homogenisierung auch bei schwer dispergierbaren Medien bei kurzer Mischzeit zu verbessern. Zur Lösung dieser Aufgabe besteht die erfindungsgemäße Einrichtung im wesentlichen darin, daß ein gemeinsam mit dem Rotor in Richtung der Achse verschiebbares, plattenförmiges Element vorgesehen ist, welches sich unter Ausbildung eines Spaltes im wesentlichen parallel zur Rotationsebene des Rotors erstreckt und Durchbrechungen aufweist, daß das plattenförmige Element an der Innenwand des Behälters dichtend oder unter Ausbildung eines Drosselquerschnittes geführt ist und daß das plattenförmige Element in seiner Drehlage gesichert oder mit von der Drehgeschwindigkeit des Rotors verschiedener Drehgeschwindigkeit und/oder Drehrichtung in einem einstellbaren axialen Abstand vom Rotor mit einem Antrieb für einen axialen Hub verbunden ist. Dadurch, daß gemeinsam mit dem Rotor ein plattenförmiges Element mit Durchbrechungen in einem vorbestimmten Abstand längs der Rotorachse im Mischgut auf und ab geführt wird, wird erreicht, daß die flüssige, zu dispergierende und zu homogenisierende Phase zwangsweise auch den Spalt zwischen dem Rotor und dem plattenförmigen Element durchströmen muß, sodaß innerhalb dieses, zwischen dem plattenförmigen Element und dem Rotor ausgebildeten Spaltes, ein definiertes und vollständiges Erfassen des zu dispergierenden Inhaltes im Mischbehälter erzielt wird. Zwischen dem plattenförmigen Element und dem Rotor wird das zu dispergierende Material in der flüssigen Phase einer definierten Scherbeanspruchung ausgesetzt, wodurch die Dispersion nach einer kurzen Behandlungszeit bei ausgezeichneter Homogenisierung stabil ausgebildet wird, wobei diese Scherkräfte dadurch sichergestellt werden, daß das plattenförmige Element entweder in seiner Drehlage gesichert ist und daher nicht mit dem Rotor in Drehbewegung versetzt wird, oder mit von der Drehgeschwindigkeit des Rotors verschiedener Drehgeschwindigkeit und/oder Drehrichtung angetrieben ist. Je nach Beschaffenheit des zu dispergierenden Gutes kann die jeweils günstigste Spaltbreite oder eine im Betrieb variable Spaltbreite vorgegeben werden, wobei durch die Durchbrechungen in dem plattenförmigen Element die Strömung durch den zwischen dem plattenförmigen Element und dem Rotor ausgebildeten Spalt sichergestellt wird. Um die entsprechenden Scherkräfte sicher auf das zu dispergierende Gut auszuüben, muß die Ausgestaltung lediglich so gewählt werden, daß Rotorflügel nicht koaxial zu den Achsen der Durchbrechungen des plattenförmigen Elementes rotieren, sodaß ein entsprechender radialer Weg durch den Schlitz zwischen dem plattenförmigen Element und dem Rotor erzwungen wird.The invention now aims to establish the beginning mentioned type in that the mixing and Disperse even with low to medium viscosity liquids completely successful within a short time and a homogeneous Mixed phase is formed. The invention aims in particular depends on the homogenization even with difficult to disperse Improve media with a short mixing time. To solve this The object of the device according to the invention is essentially in that one together with the rotor in the direction of the axis slidable, plate-shaped element is provided, which forming a gap essentially parallel to Extends the plane of rotation of the rotor and has openings, that the plate-shaped element on the inner wall of the Sealing container or with the formation of a throttle cross section is performed and that the plate-shaped element in secured its rotational position or with the rotational speed of the rotor at different speeds and / or directions of rotation at an adjustable axial distance from the rotor with a Drive for an axial stroke is connected. As a result of that together with the rotor a plate-shaped element with openings at a predetermined distance along the rotor axis is guided up and down in the mix, it is achieved that the liquid phase to be dispersed and homogenized necessarily the gap between the rotor and the plate-shaped Element must flow through, so that within this, formed between the plate-shaped element and the rotor Gap, a defined and complete grasp of the dispersing content is achieved in the mixing container. Between the plate-shaped element and the rotor that is to be dispersed Material in the liquid phase of a defined shear stress exposed, causing the dispersion after a short Treatment time with excellent homogenization is stable is ensured, thereby ensuring these shear forces be that the plate-shaped element either in its rotational position is secured and therefore not rotating with the rotor is offset, or with the speed of rotation of the rotor different rotational speed and / or direction of rotation is. Depending on the nature of the material to be dispersed can be the most favorable gap width or one in operation variable gap width can be specified, with the openings in the plate-shaped element the flow through the formed between the plate-shaped element and the rotor Gap is ensured. To the appropriate shear forces The design must exert a certain amount of exercise on the material to be dispersed just be chosen so that the rotor blades are not coaxial to the axes of the perforations of the plate-shaped Rotate element so that a corresponding radial path through the slot between the plate-shaped element and the rotor is enforced.

Mit Vorteil ist die erfindungsgemäße Ausbildung so getroffen, daß das plattenförmige Element als Stator ausgebildet ist und in seiner einer Stirnwand, insbesondere einer Deckelplatte des Behälters benachbarten Lage zur Rotation zum Räumen der Stirnwand antreibbar ist, wodurch sich eine besonders einfache und betriebssichere Konstruktion ergibt. Abweichend von bekannten Planetendissolvern kann mit wesentlich einfacherem Antrieb das Auslangen gefunden werden, wobei die Maßnahme, das im Betrieb als Stator ausgebildete plattenförmige Element lediglich in einer Endstellung kurzfristig anzutreiben dazu dient, die Stirnwand und insbesondere die dem Behälter zugewandte Wand der Deckplatte sicher zu räumen, sodaß der Reinigungsaufwand wesentlich verringert wird. The training according to the invention is advantageously made such that the plate-shaped element is designed as a stator and in its an end wall, in particular a cover plate of the container adjacent position for rotation to clear the end wall is drivable, which is a particularly simple and reliable construction results. Deviating from known ones Planetary dissolvers can do that with a much simpler drive Satisfaction can be found, taking the measure that is in operation plate-shaped element designed as a stator only in to drive a final position serves the end wall and in particular the wall of the cover plate facing the container to clear safely, so that the cleaning effort essential is reduced.

Mit Vorteil kann die erfindungsgemäße Einrichtung an unterschiedliche zu dispergierende Stoffe angepaßt werden, wofür die Ausbildung mit Vorteil so getroffen ist, daß der axiale Abstand des Stators vom Rotor durch einen oszillierenden Hubantrieb im Betrieb verstellbar ist.The device according to the invention can advantageously be used in different ways substances to be dispersed, for which the Training is advantageously taken so that the axial distance of the stator from the rotor by an oscillating stroke drive in Operation is adjustable.

Um nach erfolgter Homogenisierung und nach dem Dispergieren das Ausbringen des Mischgutes zu erleichtern, kann mit Vorteil die Ausbildung so getroffen sein, daß die Durchbrechungen des Stators verschließbar ausgebildet sind. Nach einem Verschließen der Durchbrechungen des Stators kann der Stator als Preßstempel für das Auspressen des gemischten Gutes verwendet werden.To the after homogenization and after dispersing the To facilitate the spreading of the mix, can advantageously Training must be taken so that the openings of the stator are designed to be lockable. After closing the Breakthroughs in the stator can be used as a press ram for the pressing of the mixed goods can be used.

Um insbesonders bei höher viskosen Systemen die Viskosität herabzusetzen, ist die Ausbildung mit Vorteil so getroffen, daß der Rotor und/oder der Stator mit einem Ultraschallgeber verbunden ist.Especially with higher viscosity systems the viscosity to reduce, the training is advantageously made such that the rotor and / or the stator are connected to an ultrasound transmitter is.

In einfacher Weise kann das Mischgut in einem Mischbehälter vordosiert werden, wofür beispielsweise zu dispergierende, feine, pulverförmige Feststoffe auf eine Flüssigkeit aufgebracht werden können, worauf mit Vorteil der Mischbehälter mit dem Rotor und dem Stator verbunden wird. Die Ausbildung ist hiezu in besonders einfacher Weise so getroffen, daß der Mischbehälter lösbar mit einer eine Lagerung für die Rotorwelle und/oder den axial verschiebbaren Stator aufweisenden Deckelplatte zum Verschließen des Mischbehälters verbunden ist.The mix can be pre-metered in a mixing container in a simple manner for which, for example, fine, powdery solids are applied to a liquid can, whereupon the mixing container with the rotor and is connected to the stator. The training is particularly special easily taken so that the mixing container detachably with a bearing for the rotor shaft and / or the axially displaceable Cover plate with stator for closing of the mixing container is connected.

Um auch chemisch unbeständiges und insbesondere feuchtigkeitsempfindliches Mischgut sicher und ohne Veränderung seiner Materialeigenschaften verarbeiten zu können, ist mit Vorteil die Ausbildung so getroffen, daß an die Deckelplatte und/oder den Mischbehälter wenigstens eine Leitung für den Aufbau eines vom atmosphärischen Druck verschiedenen Druckes im Mischbehälter mündet. Über eine derartige Leitung kann ein Vakuum aufgebracht werden um Oxidationserscheinungen zu vermeiden. Ebenso kann auch eine Schutzgasatmosphäre über eine derartige Leitung eingebracht werden.To also be chemically unstable and especially sensitive to moisture Mixed material safely and without changing its Being able to process material properties is an advantage Training taken so that the cover plate and / or Mixing container at least one line for building one of the atmospheric pressure of different pressure in the mixing tank flows. A vacuum can be applied via such a line to avoid signs of oxidation. Likewise, too a protective gas atmosphere is introduced via such a line will.

Eine besonders einfache Konstruktion der erfindungsgemäßen Vorrichtung läßt sich dadurch verwirklichen, daß der Rotor am Stator drehbar gelagert ist. Auf diese Weise wird auch der Lagerungsaufwand wesentlich vereinfacht.A particularly simple construction of the device according to the invention can be realized in that the rotor on Stator is rotatably mounted. In this way, the storage effort much simplified.

Eine weitere Maßnahme empfindliches Mischgut sicher ohne Veränderung der Materialeigenschaften zu homogenisieren und zu dispergieren, besteht wie es einer bevorzugten Weiterbildung entspricht darin, daß der Mischbehälter mit einem Kühlmantel versehen ist.Another measure of sensitive mix safely without change homogenize and disperse the material properties, exists as it corresponds to a preferred further training in that the mixing container is provided with a cooling jacket is.

In allen Fällen ist es vorteilhaft, wenn sich der gemeinsame Hub des Rotors und des Stators über die gesamte axiale Höhe des Mischbehälters erstreckt, sodaß mit nur wenigen axialen Hüben und in überaus kurzer Zeit eine vollständige Vermischung und Homogenisierung sowie Dispergierung erzielt werden kann.In all cases, it is advantageous if the common hub of the rotor and the stator over the entire axial height of the Mixing container extends so that only a few axial strokes and in a very short time a complete mixing and Homogenization and dispersion can be achieved.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch beschriebenen Ausführungsbeispieles näher erläutert. In dieser zeigen Fig.1 eine schematische Darstellung des mit einem Deckel verschlossenen Mischbehälters am Beginn des Misch- und Dispergiervorganges, Fig.2 eine erste Betriebsstellung mit einer ersten vordefinierten Spaltbreite und Fig.3 einen weiteren Betriebszustand der erfindungsgemäßen Vorrichtung mit veränderter Spaltbreite zwischen Rotor und Stator.The invention is described below with reference to a drawing schematically described embodiment explained in more detail. 1 shows a schematic representation of the a lid of the mixing container closed at the beginning of the mixing and dispersing process, Figure 2 with a first operating position a first predefined gap width and FIG. 3 a further one Operating state of the device according to the invention with changed Gap width between rotor and stator.

In Fig.1 ist mit 1 ein Mischbehälter bezeichnet, welcher von einem Kühlmantel 2 umgeben ist. Das Kühlmedium kann über die Anschlüsse 3 und 4 zu- und abgeführt werden.In Figure 1, 1 denotes a mixing container, which of is surrounded by a cooling jacket 2. The cooling medium can Connections 3 and 4 are fed in and out.

In den Mischbehälter 1 wird zunächst das zu vermischende Gut in vordosierter Menge eingebracht, wobei mit 5 die flüssige Phase und mit 6 eine Pulverphase bezeichnet ist. In the mixing container 1, the material to be mixed is first in predosed amount introduced, with 5 the liquid phase and 6 denotes a powder phase.

Im Deckel 7, welcher auf dem Behälter 1 aufgesetzt werden kann, ist eine Gleitlagerung 8 vorgesehen, über welche die Mischwerkzeuge bei ihrem axialen Hub geführt wird. Das Mischwerkzeug umfaßt einen Rotor 9, welcher durch eine Rotorwelle 10 zur Rotation im Sinne des Pfeiles 11 antreibbar ist. Der Antriebsmotor ist hiebei konventioneller Art und der Einfachheit halber nicht dargestellt.In the lid 7, which can be placed on the container 1, a sliding bearing 8 is provided, via which the mixing tools is guided in their axial stroke. The mixing tool comprises a rotor 9 which through a rotor shaft 10 for Rotation in the direction of arrow 11 can be driven. The drive motor is conventional and for the sake of simplicity not shown.

Die Rotorwelle 10 ist konzentrisch zu einer Pinole 12 angeordnet und rotierend über Lager 13 in dieser gelagert. Die Pinole 12 ist drehfest mit einem plattenförmigen Element 14 verbunden, welches Durchbrechungen 15 aufweist. Zwischen dem Rotor 9 und dem plattenförmigen Element 14 ist ein Spalt 16 ausgebildet, wobei der Rotor 9 und das plattenförmige Element 14 im Sinne des Doppelpfeiles 17 in axialer Richtung gemeinsam oder relativ zueinander verschiebbar sind. Das plattenförmige Element 14 kann bei einem derartigen Hub in Richtung des Doppelpfeiles 17 gegen Verdrehung gesichert sein oder aber mit einem gesonderten oder vom Drehantrieb der Rotorwelle 10 abgeleiteten Drehantrieb mit verschiedener Drehgeschwindigkeit zur Rotation angetrieben sein. Zum Räumen der Unterkante des Deckels 7 genügt es allerdings das plattenförmige Element 14 lediglich in der oberen Endlage zur Rotation anzutreiben, sodaß die Unterkante 18 der Deckelplatte 7 sicher geräumt werden kann.The rotor shaft 10 is arranged concentrically with a quill 12 and rotatably supported via bearing 13 in this. The quill 12 is rotatably connected to a plate-shaped element 14, which has openings 15. Between the rotor 9 and a gap 16 is formed in the plate-shaped element 14, the rotor 9 and the plate-shaped element 14 in the sense of Double arrow 17 in the axial direction together or relatively are displaceable to each other. The plate-shaped element 14 can with such a stroke in the direction of the double arrow 17 against Be secured against rotation or with a separate or Rotary drive derived from the rotary drive of the rotor shaft 10 different rotational speed to be driven to rotate. To clear the lower edge of the lid 7, however, it is sufficient plate-shaped element 14 only in the upper end position To drive rotation, so that the lower edge 18 of the cover plate 7th can be cleared safely.

Zum Mischen und Dispergieren des Materials wird nun die Pinole 12 und damit das plattenförmige Element 14 sowie der Rotor 9 in das zu vermischende Medium abgesenkt, wobei das Medium vom Rotor 9 erfaßt und durch den Spalt 16 und die Durchbrechungen 15 des plattenförmigen Elementes hindurchgefördert wird. Zwischen dem plattenförmigen Element 14 und dem Rotor 9 wird das Material auf Scherung beansprucht, sodaß eine intensive Vermischung im Spalt 16 erfolgt. Diese Arbeitsposition der Mischwerkzeuge ist in Fig.2 ersichtlich.The quill is now used to mix and disperse the material 12 and thus the plate-shaped element 14 and the rotor 9 in the medium to be mixed is lowered, the medium from the rotor 9 detected and through the gap 16 and the openings 15 of the plate-shaped element is conveyed through. Between the plate-shaped element 14 and the rotor 9, the material is on Shear stresses, so that an intensive mixing in the gap 16 takes place. This working position of the mixing tools is in Fig.2 can be seen.

Je nach zu dispergierenden Medium kann die axiale Spaltbreite des Spaltes 16 hier während des Hubes im Sinne des Doppelpfeiles 17 konstant gehalten werden oder aber auch im Betrieb verändert werden. Wie in Fig.3 ersichtlich, kann dieser Spalt 16 verbreitert werden, wobei eine besonders intensive Durchmischung und Dispergierung dadurch erzielt werden kann, daß das plattenförmige Element 14 in Richtung des Doppelpfeiles 17 relativ zum axialen Hub des Rotors 9 oszillierend angetrieben wird, so daß eine zyklisch Vergrößerung und Verringerung der Spaltweite a des Spaltes 16 erzielt wird.The axial gap width can vary depending on the medium to be dispersed of the gap 16 here during the stroke in the sense of the double arrow 17 can be kept constant or changed during operation will. As can be seen in FIG. 3, this gap 16 can be widened be, with a particularly intensive mixing and Dispersion can be achieved in that the plate-shaped Element 14 in the direction of the double arrow 17 relative to axial stroke of the rotor 9 is driven to oscillate, so that a cyclical increase and decrease in the gap width a des Gap 16 is achieved.

Nach Beendigung des Mischvorganges können die Durchbrechungen 15 des plattenförmigen Elementes 14 wahlweise verschlossen werden, um bei einem Aufwärtsschub des plattenförmigen Elementes das gesamte gemischte Material sicher auszubringen.After the mixing process has ended, the openings 15 the plate-shaped element 14 can optionally be closed, to the at an upward push of the plate-shaped element to spread all mixed material safely.

Das plattenförmige Element 14 kann an seinem Umfang über eine Dichtung 19 gegenüber der Innenwand des Behälters 1 abgedichtet werden. Anstelle einer derartigen Dichtung 19 kann aber auch ein Drosselspalt ausgebildet werden, welcher so dimensioniert sein muß, daß tatsächlich der wesentliche Teil des zu behandelnden Mediums durch den Spalt 16 gefördert wird und nicht frei an der Außenkante des plattenförmigen Elementes 14 durchtreten kann.The plate-shaped element 14 can have a circumference Seal 19 sealed against the inner wall of the container 1 will. Instead of such a seal 19, however, a Throttle gap are formed, which should be dimensioned must actually be the essential part of the subject to be treated Medium is promoted through the gap 16 and not free at the Can pass through the outer edge of the plate-shaped element 14.

Claims (10)

Einrichtung zum Homogenisieren und Dispergieren von flüssigen Phasen oder von Feststoffen in Flüssigkeiten mit einem Mischbehälter (1) und einem als Rotor (9) ausgebildeten Mischwerkzeug, welches um eine Achse rotierbar und in Richtung seiner Achse verschiebbar gelagert und mit einem Antrieb verbindbar ist, dadurch gekennzeichnet, daß ein gemeinsam mit dem Rotor (9) in Richtung der Achse verschiebbares, plattenförmiges Element (14) vorgesehen ist, welches sich unter Ausbildung eines Spaltes (16) im wesentlichen parallel zur Rotationsebene des Rotors (9) erstreckt und Durchbrechungen (15) aufweist, daß das plattenförmige Element (14) an der Innenwand des Behälters (1) dichtend oder unter Ausbildung eines Drosselquerschnittes geführt ist und daß das plattenförmige Element (14) in seiner Drehlage gesichert oder mit von der Drehgeschwindigkeit des Rotors (9) verschiedener Drehgeschwindigkeit und/oder Drehrichtung in einem einstellbaren axialen Abstand vom Rotor (9) mit einem Antrieb für einen axialen Hub verbunden ist.Device for homogenizing and dispersing liquid Phases or solids in liquids with a mixing tank (1) and a mixing tool designed as a rotor (9), which is rotatable about an axis and in the direction of its axis is slidably mounted and can be connected to a drive, thereby characterized in that a together with the rotor (9) in Plate-shaped element (14) displaceable in the direction of the axis is provided, which forms a gap (16) essentially parallel to the plane of rotation of the rotor (9) extends and has openings (15) that the plate-shaped Sealing element (14) on the inner wall of the container (1) or is performed with the formation of a throttle cross section and that the plate-shaped element (14) secured in its rotational position or with different from the speed of rotation of the rotor (9) Rotation speed and / or direction of rotation in one adjustable axial distance from the rotor (9) with a drive for one axial stroke is connected. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das plattenförmige Element (14) als Stator ausgebildet ist und in seiner einer Stirnwand, insbesondere einer Deckelplatte des Behälters benachbarten Lage zur Rotation zum Räumen der Stirnwand antreibbar ist.Device according to claim 1, characterized in that the plate-shaped element (14) is designed as a stator and in its an end wall, in particular a cover plate of the container adjacent position for rotation to clear the end wall is drivable. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der axiale Abstand des Stators vom Rotor (9) durch einen oszillierenden Hubantrieb in Betrieb verstellbar ist.Device according to claim 1 or 2, characterized in that that the axial distance of the stator from the rotor (9) by a oscillating linear actuator is adjustable in operation. Einrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Durchbrechungen (15) des Stators verschließbar ausgebildet sind.Device according to claim 1, 2 or 3, characterized in that that the openings (15) of the stator are closable are. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Rotor (9) und/oder der Stator mit einem Ultraschallgeber verbunden ist. Device according to one of claims 1 to 4, characterized in that that the rotor (9) and / or the stator with an ultrasonic transmitter connected is. Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Mischbehälter (1) lösbar mit einer eine Lagerung für die Rotorwelle (10) und/oder den axial verschiebbaren Stator aufweisenden Deckelplatte (7) zum Verschließen des Mischbehälters (1) verbunden ist.Device according to one of claims 1 to 5, characterized in that that the mixing container (1) detachably with a storage for the rotor shaft (10) and / or the axially displaceable Cover plate (7) with stator for closing the mixing container (1) is connected. Einrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß an die Deckelplatte (7) und/oder den Mischbehälter (1) wenigstens eine Leitung für den Aufbau eines vom atmosphärischen Druck verschiedenen Druckes im Mischbehälter (1) mündet.Device according to one of claims 1 to 6, characterized in that that to the cover plate (7) and / or the mixing container (1) at least one line for building one from the atmospheric Pressure of different pressure in the mixing container (1) opens. Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Rotor (9) am Stator drehbar gelagert ist.Device according to one of claims 1 to 7, characterized in that that the rotor (9) is rotatably mounted on the stator. Einrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Mischbehälter (1) mit einem Kühlmantel (2) versehen ist.Device according to one of claims 1 to 8, characterized in that that the mixing container (1) with a cooling jacket (2) is provided. Einrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der gemeinsame Hub des Rotors (9) und des Stators sich über die gesamte axiale Höhe des Mischbehälters (1) erstreckt.Device according to one of claims 1 to 9, characterized in that that the common stroke of the rotor (9) and the Stator over the entire axial height of the mixing container (1) extends.
EP97890194A 1996-09-25 1997-09-24 Apparatus for homogenizing and dispersing liquid phases Ceased EP0832682A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT563/96 1996-09-25
AT0056396U AT1956U1 (en) 1996-09-25 1996-09-25 DEVICE FOR HOMOGENIZING AND DISPERSING LIQUID PHASES

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Cited By (5)

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EP1250951A1 (en) * 2001-04-17 2002-10-23 Fitech AG Device for mixing and dispensing of in particular viscous or pasty materials
EP1252922A1 (en) * 2001-04-17 2002-10-30 Fitech AG Commercial scale device for mixing and dispensing of in particular viscous or pasty materials
AT413698B (en) * 2002-09-27 2006-05-15 Suedzucker Ag MIXING DEVICE AND COVERING DEVICE, USE THEREOF AND METHOD FOR MODIFYING AND DERIVATING CARBOHYDRATES
EP2216091A1 (en) * 2007-11-30 2010-08-11 Shigeo Ando Cooler of high-pressure homogenizer
CN110559924A (en) * 2019-08-12 2019-12-13 长沙力源健康发展有限公司 Blood detection reagent preparation device

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DE10152115A1 (en) * 2001-10-23 2003-05-08 Bosch Gmbh Robert Device for mixing at least two fluids

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EP0196291A2 (en) * 1985-03-21 1986-10-01 Wolf-Dieter Kreuziger Mixing device
SU1570753A1 (en) * 1988-02-05 1990-06-15 В.Г.Вохм нин (ЬЗ) 66.063 (088.8) Vibrating mixer

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US4118797A (en) * 1977-10-25 1978-10-03 Energy And Minerals Research Co. Ultrasonic emulsifier and method
EP0196291A2 (en) * 1985-03-21 1986-10-01 Wolf-Dieter Kreuziger Mixing device
SU1570753A1 (en) * 1988-02-05 1990-06-15 В.Г.Вохм нин (ЬЗ) 66.063 (088.8) Vibrating mixer

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1250951A1 (en) * 2001-04-17 2002-10-23 Fitech AG Device for mixing and dispensing of in particular viscous or pasty materials
EP1252922A1 (en) * 2001-04-17 2002-10-30 Fitech AG Commercial scale device for mixing and dispensing of in particular viscous or pasty materials
AT413698B (en) * 2002-09-27 2006-05-15 Suedzucker Ag MIXING DEVICE AND COVERING DEVICE, USE THEREOF AND METHOD FOR MODIFYING AND DERIVATING CARBOHYDRATES
EP2216091A1 (en) * 2007-11-30 2010-08-11 Shigeo Ando Cooler of high-pressure homogenizer
EP2216091A4 (en) * 2007-11-30 2011-11-23 Shigeo Ando Cooler of high-pressure homogenizer
CN110559924A (en) * 2019-08-12 2019-12-13 长沙力源健康发展有限公司 Blood detection reagent preparation device

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