EP0850106A1 - Dispersing device and process - Google Patents

Dispersing device and process

Info

Publication number
EP0850106A1
EP0850106A1 EP96938007A EP96938007A EP0850106A1 EP 0850106 A1 EP0850106 A1 EP 0850106A1 EP 96938007 A EP96938007 A EP 96938007A EP 96938007 A EP96938007 A EP 96938007A EP 0850106 A1 EP0850106 A1 EP 0850106A1
Authority
EP
European Patent Office
Prior art keywords
dispersing
ball mill
shaft
housing
dispersing device
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.)
Granted
Application number
EP96938007A
Other languages
German (de)
French (fr)
Other versions
EP0850106B1 (en
Inventor
Hermann Getzmann
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to SI9630185T priority Critical patent/SI0850106T1/en
Publication of EP0850106A1 publication Critical patent/EP0850106A1/en
Application granted granted Critical
Publication of EP0850106B1 publication Critical patent/EP0850106B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/8305—Devices with one shaft, provided with mixing and milling tools, e.g. using balls or rollers as working tools; Devices with two or more tools rotating about the same axis
    • 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
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • 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
    • B02C17/168—Mills in which a fixed container houses stirring means tumbling the charge with a basket media milling device arranged in or on the container, involving therein a circulatory flow of the material to be milled

Definitions

  • the invention relates to a dispersing device consisting of a container for receiving and processing the dispersed material, a flow generating device which can be driven by a shaft, a grinding device containing a grinding medium with a housing which has openings through which the substances to be dispersed are due of the flow generated by the flow generating device and an agitator device arranged in the housing and rotatable relative thereto.
  • the invention relates to a method for pre-dispersing and fine-dispersing a finely divided and finely divided, solid substance in a dispersion in a container, the predispersion being carried out using a dissolver and the fine dispersion being carried out using an agitator ball mill.
  • Such a device achieves a distribution of fine and very fine, solid components in the liquid phase.
  • Such a grinding device is known from US Pat. No. 5,184,783.
  • an agitator immersion mill is disclosed which disperses by the circulation process. It essentially consists of a wear-resistant sieve basket filled with grinding balls, which is immersed in a double-walled container.
  • a cylindrical drive shaft runs through the center of the strainer basket. This drive shaft drives the stirrer device arranged in the sieve basket and designed as rods.
  • the walls of the strainer basket have perforated perforations in a sieve shape.
  • the drive shaft In order to enable the grinding medium to circulate through the screen basket, the drive shaft also drives a flow generating device in addition to the agitator device. This flow generating device must be located outside the strainer basket to ensure sufficient flow. The drive shaft thus penetrates the screen basket. A separation and sealing system is installed at the penetration point, which prevents the grinding media from escaping from the sieve.
  • the central arrangement of the flow generating device brings clear advantages in terms of flow technology, since thus ensuring a uniform flow through the entire container.
  • the dispersed material in order to carry out an economical dispersion process using the dispersing device known from the prior art, the dispersed material must be predispersed.
  • Pre-dispersion is preferably carried out with a dissolver disk, since, particularly in the case of agglomerates which are difficult to disperse and which still require the use of the grinding device in the further process, optimum predispersion is essential for economic reasons.
  • An insufficiently predispersed product not only requires longer running times of the grinding device known from the prior art, but often the desired fineness is not achieved. Failures or errors in predispersion cannot usually be compensated for by other systems.
  • insufficiently pre-dispersed products cause the holes in the sieve basket to become clogged when the grinding device is used further, as a result of which the circulation through the sieve basket is made more difficult or even completely prevented.
  • the dispersed material can only be dispersed to a certain degree of fineness.
  • fine dispersion an agitator ball mill or a similar grinding device must be used.
  • the object of the present invention is to simplify the construction of the agitator ball mill known from the prior art and to expand its field of application.
  • the housing of the grinding device is designed in the form of an annular channel which has a central hole and the shaft runs through the central hole of the annular channel.
  • the housing of the ring channel has an open profile
  • the agitator device can be connected to the shaft via at least one connecting web which runs through the open profile.
  • the housing is designed to be closed and the agitator device arranged in the housing is set in rotation by a drive arranged outside the housing, such as an electromagnetic drive.
  • Alternative configurations of the drive are conceivable and depend on the field of application of the dispersing device.
  • the drive shaft for the flow generating device can run centrally along the axis of rotation of the screen basket. This maintains the fluidic advantage of the central arrangement of the flow generating device.
  • the housing of the ring channel has an open profile
  • the agitator device can be driven by a second shaft and the agitator device can be connected to a further shaft via at least one connecting web which runs through the open profile.
  • the further shaft is preferably designed as a hollow shaft which encloses the shaft of the flow generating device.
  • the external hollow shaft can drive the agitator device arranged in the housing of the grinding device in a particularly simple manner, irrespective of the speed of the drive shaft of the flow generating device.
  • Both shafts can be driven simultaneously or each separately from one another or even in the opposite direction of rotation.
  • a kinematic reversal within the grinding device is also possible. That is, the entire grinding device is rotatable relative to the fixed agitator device.
  • the agitator device can be designed as desired depending on the dispersion task. You can e.g. B. as a circular ring disk, circular ring perforated disk, slotted disk, pins and. ⁇ . Be trained.
  • the agitator device preferably has at least one circular disk which extends coaxially to the ring channel and extends in the ring channel. The agitator device thus ensures a continuous movement of the grinding medium arranged in the housing.
  • the flow generating device has means for dispersing. It is particularly advantageous if these dispersing means are designed as a dissolver disk.
  • the dissolver disc then generates the flow necessary for the operation of the dispersing device and also predisperses the grinding medium.
  • the dissolver be fulfills a particularly important task for the dispersion, namely the uniform product circulation down to the edge zone of the mixing container.
  • a dissolver disc fulfills the tasks of dispersing, that is to say dissolving agglomerates and wetting the primary particles in the liquid phase, in a particularly economical manner, since the dispersion is carried out significantly more quickly than within the grinding device.
  • the dispersing device according to the invention is preferably designed in such a way that the height of the grinding device is adjustable and it can be immersed in the dispersed material by means of the height adjustment and can be removed completely from the latter.
  • the individual process steps of predispersion and fine dispersion can be carried out completely separately from one another without the substances to be dispersed having to be removed from the container or a change in the agitator devices being necessary.
  • a change between predispersion and fine dispersion can be carried out particularly quickly and economically.
  • both methods predispersion using the dissolver disc and finely dispersing using the agitator ball mill, can be carried out using the circulation method.
  • the methods can be carried out separately or simultaneously.
  • the latter variant in particular is particularly simple and economically feasible in the dispersion device according to the invention, since there is no need to change the stirrers or containers between the predispersion and the subsequent fine dispersion in the grinding device.
  • Both shafts are preferably driven by one and the same motor, which significantly simplifies the operational structure.
  • Suitable gear means are then provided above the dispersing device, which make it possible for the two Shafts separately from each other or parallel to each other.
  • the ring channel has a rectangular cross section.
  • all other suitable cross-sectional shapes of the ring channel are also conceivable, such as. B. a round cross-section.
  • the cross-sectional shape of the ring channel depends essentially on the required flow properties.
  • FIG. 1 is a front view in section through the dispersing device according to the invention during predispersion
  • FIG. 2 shows the same view as in FIG. 1 with the agitator ball mill lowered during fine dispersion
  • Fig. 3 shows the same view as in Fig. 1 when cleaning the dispersing device
  • Fig. 4 is a front view of an alternative embodiment of the dispersing device according to the invention.
  • the dispersing device consists of an essentially cylindrical, double-walled container 1 closed with a lid, a dissolver 2, an agitator ball mill 3 and several cleaning nozzles 4.
  • the dissolver consists of a cylindrical shaft 21 which has a dissolver disk 22 at its lower end.
  • the circumferential disc is equipped with a plurality of teeth 23 alternately curved upwards and downwards on the circular surface.
  • the agitator ball mill 3 consists of a sieve-like perforated housing 31 in which the grinding balls 32 are held.
  • the housing 31 is provided on its upper side with an opening 33 running all around.
  • the housing 31 is single-walled in the example shown, but can alternatively also be double-walled or in another suitable manner.
  • the housing forms a toroidal ring channel with a central hole 34.
  • the shaft 21 of the dissolver 2 runs through this hole 34.
  • Inside the ring channel there are two circular ring disks 35 which run coaxially to the ring channel.
  • the ring disks 35 are connected to one another by a web 36.
  • the web 36 also connects the annular disks 35 to the hollow shaft 37.
  • the hollow shaft 37 is driven by a motor (not shown in more detail).
  • the hollow shaft 37 and the shaft 21 run coaxially with one another, the shaft 21 running inside the hollow shaft 37.
  • the container 1 is provided on its wall with a plurality of cleaning nozzles 4.
  • Each cleaning nozzle 4 consists of a spray head 41, a hollow cylinder 42 fastened to the wall of the container 1 and a piston 43 guided in the hollow cylinder 42, which has a spray head 41 at its end facing the center of the container 1.
  • the ball mill 3 is held on its circumferential side by rods 39, by means of which it can be adjusted in height by a drive device (not shown in more detail).
  • the rods 39 are fastened in such a way that they enable the height adjustment of the agitator ball mill, but do not hinder its rotation.
  • the agitator ball mill 3 is in its upper position so that it does not come into contact with the dispersed material 5.
  • the hollow shaft 37 is not driven in this position.
  • the predispersion is only effected by the rotation of the dissolver 2, the height of which also occurs can be adjusted to ensure the appropriate process conditions. In this way, the “donut effect” desired in the pre-dispersion can be established.
  • the circulation of the dispersed material 5 (represented by arrows) is not hindered by the agitator ball mill 3, so that an efficient and rapid predispersion is carried out by the disperser 2.
  • the agitator ball mill 3 is shown in its lowered position in FIG. 2.
  • the agitator ball mill 3 is adjusted in height within the container 1 by the rods 39 with the hollow shaft 37 and sunk into the dispersed material 5.
  • the agitator ball mill 3 is completely immersed in the dispersed material 5, and the annular discs 35 are set in rotation by the hollow shaft 37 in relation to the housing 31 of the agitator ball mill 3.
  • the annular discs 35 set the grinding balls 32 in motion so that the grinding process within the agitator ball mill 3 is carried out.
  • the disperser 2 also ensures circulation (represented by arrows) of the dispersed material 5, but circulation is now also preferably effected through the sieve-like perforated housing of the agitator ball mill 3. As a result, fine dispersion is carried out by the agitator ball mill 3 in the circulation process.
  • FIG. 3 shows the cleaning of the dispersing device according to the invention after the dispersed material has been pumped out by means of a suitable pump device, not shown.
  • the spray heads 41 arranged along the wall of the container 1 are pushed into the interior of the container. This is done by displacing the pistons 43 within the hollow cylinder 42 axially along their longitudinal axis towards the center of the container 1.
  • the pistons 43 are hollow on the inside and guide the cleaning liquid to the spray heads 41 through a pressure generating means (not shown in more detail).
  • the spray heads 41 spray cleaning agents through appropriately designed openings into the interior of the container 1. In this way, the walls and devices are first lines sprayed, and in the further course there is a filling of the container 1 with the cleaning liquid.
  • the particles of the dispersed material 5 adhering to the dissolver 2 and the agitator ball mill 3 are detached from the dispersing device by the cleaning agent.
  • a mixture of cleaning agent and dispersed material 5 forms at the bottom of the container 1, which is called cleaning liquid 6 here.
  • the dissolver 2 and the agitator ball mill 3 are rotated in the cleaning liquid 6 as before, but this time for cleaning the components.
  • the central hole 34 of the agitator ball mill 3 increases - in comparison to the prior art - the surface of the housing through which the cleaning liquid 6 can enter or pass through the inside of the agitator ball mill 3. The cleaning process is thus accelerated by the design of the agitator ball mill 3 with a central hole 34.
  • the cleaning nozzles 4 can also be designed such that they extend into the interior of the hole 34 of the agitator ball mill 3 during the spraying process and thus spray the inner periphery of the agitator ball mill 3, or be arranged such that they alternate the outer and the inner ones Spray the periphery of the agitator ball mill 3.
  • Suitable holes can also be formed in the hollow shaft 21, through which a cleaning agent is sprayed.
  • the cleaning liquid 6 is pumped off, the cleaning nozzles 4 are pulled out of the container 1 and the agitator ball mill 3 is moved into its upper position by means of the rod 39.
  • the dispersing device is ready for use again.
  • FIG. 4 shows an alternative embodiment of the dispersing device according to the invention.
  • a single shaft 44 drives both the annular disks 35 and the dissolver disk 22 provided at its lower end.
  • This embodiment represents the simplest and cheapest implementation of the dispersing device according to the invention.
  • the exemplary embodiments shown here all relate to dispersing devices in which the housing is stationary and the agitator device is arranged rotatably relative to this housing. It is also within the scope of the invention to design the dispersing device to be kinematically reversed.
  • the flow generating device is designed to be stationary while the housing is rotated relative to the stationary agitator device.
  • the housing of the agitator device and / or the flow generating device is driven by suitable drive means known to the person skilled in the art, for example mechanical, electrical or magnetic drives.
  • the dispersing device combines a dissolver and an agitator ball mill in one device.
  • the advantages of the flow generation device arranged centrally in the container from the prior art are retained.
  • penetration of the agitator ball mill by the drive shaft of the dissolver is avoided.
  • the change from pre-dispersion to fine dispersion is simplified and accelerated.
  • an arrangement of both devices as a completely closed system can be realized in the smallest space. Solvents can

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

PCT No. PCT/DE96/01695 Sec. 371 Date Mar. 9, 1998 Sec. 102(e) Date Mar. 9, 1998 PCT Filed Sep. 5, 1996 PCT Pub. No. WO97/09115 PCT Pub. Date Mar. 13, 1997In order to reduce the conversion and cleaning effort between pre-dispersion by a dissolver (2) and fine dispersion by an agitating ball mill (3), it is proposed to combine both devices in a single container. The casing (31) of the agitating ball mill (3) is in the form of a toroidal annular channel with a central hole (34). The drive shaft (21) of the dissolver (2) runs through said central hole (34) in the agitating ball mill (3). Dispersion may take place in the dispersing device simultaneously or in succession. The agitating ball mill (3) is preferably lowered inside the container (1) along the common axis after a pre-determined time and caused to act on the substance to be dispersed (5).

Description

Dispergiervorrichtung und Dispergierverfahren Dispersing device and method
Die Erfindung betrifft eine Dispergiervorrichtung, bestehend aus einem Behälter zur Aufnahme und Bearbeitung des Disper- giergutes, einer durch eine Welle antreibbaren Strömungserzeu- gungsvorrichtung, einer ein Mahlmedium enthaltenden Mahlvor¬ richtung mit einem Gehäuse, das Öffnungen aufweist, durch welche die zu dispergierenden Substanzen aufgrund der durch die Strömungserzeugungsvorrichtung erzeugten Strömung hin¬ durchtreten, und einer in dem Gehäuse angeordneten und relativ zu diesem drehbaren Rührwerksvorrichtung. Daneben betrifft die Erfindung ein Verfahren zur Vor- und Feindispergierung eines fein- und feinstteiligen, festen Stoffes in einem Dispergier- gut in einem Behälter, wobei die Vordispergierung mittels eines Dissolvers und die Feindispergierung mittels einer Rühr- werkskugelmühle durchgeführt werden.The invention relates to a dispersing device consisting of a container for receiving and processing the dispersed material, a flow generating device which can be driven by a shaft, a grinding device containing a grinding medium with a housing which has openings through which the substances to be dispersed are due of the flow generated by the flow generating device and an agitator device arranged in the housing and rotatable relative thereto. In addition, the invention relates to a method for pre-dispersing and fine-dispersing a finely divided and finely divided, solid substance in a dispersion in a container, the predispersion being carried out using a dissolver and the fine dispersion being carried out using an agitator ball mill.
Durch eine derartige Vorrichtung wird eine Verteilung von fein- und feinstteiligen, festen Bestandteilen in der flüssi¬ gen Phase erreicht.Such a device achieves a distribution of fine and very fine, solid components in the liquid phase.
Beim Dispergierprozeß laufen drei Teilschritte nebeneinander ab:In the dispersion process, three sub-steps run side by side:
1. die Benetzung der Oberfläche des einzuarbeitenden Fest- Stoffes durch flüssige Bestandteile des Mahlgutes,1. the wetting of the surface of the solid material to be incorporated by liquid components of the regrind,
2. die mechanische Zerteilung von Agglomeraten in kleinere Agglomerate und Primärpartikel und2. the mechanical division of agglomerates into smaller agglomerates and primary particles and
3. die Stabilisierung von Primärpartikeln, Agglomeraten und Aggregaten gegen erneute Zusammenlagerung (= Flockung) . Obwohl sich die nachstehenden Ausführungen überwiegend auf die Dispergierung von Farben und Lacken beziehen, läßt sich diese Verfahrenstechnik analog auch auf andere Bereiche (z. B. Bio¬ logie, Lebensmitteltechnologie, Pharmazie, Agrochemie, kera- mische Industrie u. ä.) übertragen.3. the stabilization of primary particles, agglomerates and aggregates against renewed accumulation (= flocculation). Although the following explanations mainly relate to the dispersion of paints and varnishes, this process technology can also be applied analogously to other areas (eg biology, food technology, pharmacy, agrochemistry, ceramic industry and the like).
Bei der Dispergierung von Farben ist es zum Beispiel von wirt¬ schaftlichem Interesse, den Einsatz der kostenintensiveren, farbgebenden Primärteilchen so gering wie möglich zu halten. Die Farbwirkung und der Glanz werden um so intensiver, je bes¬ ser dispergiert wird. Durch eine gute Dispergierung kann also z. B. der Einsatz der kostenintensiven, farbgebenden Primär¬ teilchen durch die kostengünstigeren Sekundärteilchen verrin¬ gert werden. Im Idealfall ist jedes Primärteilchen separat be- netzt.When dispersing paints, for example, it is of economic interest to keep the use of the more expensive, color-imparting primary particles as low as possible. The better the dispersion, the more intense the color effect and the gloss. With a good dispersion z. B. the use of the cost-intensive, coloring primary particles can be reduced by the less expensive secondary particles. Ideally, each primary particle is wetted separately.
Aus der US-PS 5,184,783 ist eine derartige Mahlvorrichtung be¬ kannt. In dieser Patentschrift wird eine Rührwerks-Tauchmühle offenbart, die nach dem Zirkulationsverfahren dispergiert. Sie besteht im wesentlichen aus einem verschleißfesten, mit Mahl¬ kugeln gefüllten Siebkorb, der in einen doppelwandigen Behäl¬ ter eintaucht. Durch die Mitte des Siebkorbs verläuft eine zy¬ lindrische Antriebswelle. Diese Antriebswelle treibt die in dem Siebkorb angeordnete als Stangen ausgebildete Rührwerks- Vorrichtung an. Die Wände des Siebkorbs weisen eine siebartig perforierte Lochung auf .Such a grinding device is known from US Pat. No. 5,184,783. In this patent, an agitator immersion mill is disclosed which disperses by the circulation process. It essentially consists of a wear-resistant sieve basket filled with grinding balls, which is immersed in a double-walled container. A cylindrical drive shaft runs through the center of the strainer basket. This drive shaft drives the stirrer device arranged in the sieve basket and designed as rods. The walls of the strainer basket have perforated perforations in a sieve shape.
Um die Zirkulation des Mahlmediums durch den Siebkorb zu er¬ möglichen, treibt die Antriebswelle neben der Rührwerksvor- richtung zudem eine Strömungserzeugungsvorrichtung an. Diese Strömungserzeugungsvorrichtung muß außerhalb des Siebkorbes gelegen sein, um eine ausreichende Strömung zu gewährleisten. Die Antriebswelle durchdringt also den Siebkorb. An der Durch¬ dringungsstelle ist ein Trenn- und Dichtungssystem eingebaut, das den Austritt der Mahlkörper aus dem Sieb verhindert.In order to enable the grinding medium to circulate through the screen basket, the drive shaft also drives a flow generating device in addition to the agitator device. This flow generating device must be located outside the strainer basket to ensure sufficient flow. The drive shaft thus penetrates the screen basket. A separation and sealing system is installed at the penetration point, which prevents the grinding media from escaping from the sieve.
Die zentrale Anordnung der Strömungserzeugungsvorrichtung bringt eindeutige strömungstechnische Vorteile mit sich, da somit ein gleichmäßiges Durchströmen des gesamten Behälters sichergestellt wird.The central arrangement of the flow generating device brings clear advantages in terms of flow technology, since thus ensuring a uniform flow through the entire container.
Zur Durchführung eines wirtschaftlichen Dispergierprozesses mit der aus dem Stand der Technik bekannten Dispergiervor¬ richtung muß das Dispergiergut jedoch vordispergiert werden. Vorzugsweise wird mit einer Dissolverscheibe vordispergiert, da insbesondere bei schwer dispergierbaren Agglomeraten, die im weiteren Verfahren noch den Einsatz der Mahlvorrichtung er- fordern, eine optimale Vordispergierung aus wirtschaftlichen Gründen unerläßlich ist. Ein ungenügend vordispergiertes Pro¬ dukt erfordert nicht nur längere Laufzeiten der aus dem Stand der Technik bekannten Mahlvorrichtung, sondern es werden oft nicht die erwünschten Feinheiten erreicht. Versäumnisse oder Fehler bei der Vordispergierung können in der Regel nicht durch andere Systeme ausgeglichen werden. Insbesondere des¬ halb, weil unzureichend vordispergierte Produkte bei der wei¬ teren Verwendung der Mahlvorrichtung das Zusetzen der Löcher des Siebkorbes bewirken, wodurch die Zirkulation durch den Siebkorb erschwert oder sogar vollständig verhindert wird.However, in order to carry out an economical dispersion process using the dispersing device known from the prior art, the dispersed material must be predispersed. Pre-dispersion is preferably carried out with a dissolver disk, since, particularly in the case of agglomerates which are difficult to disperse and which still require the use of the grinding device in the further process, optimum predispersion is essential for economic reasons. An insufficiently predispersed product not only requires longer running times of the grinding device known from the prior art, but often the desired fineness is not achieved. Failures or errors in predispersion cannot usually be compensated for by other systems. In particular, because insufficiently pre-dispersed products cause the holes in the sieve basket to become clogged when the grinding device is used further, as a result of which the circulation through the sieve basket is made more difficult or even completely prevented.
Von dem Dissolver kann aber häufig nur eine Vordispergierung vollzogen werden, d. h., daß das Dispergiergut nur bis zu einem gewissen Feinheitsgrad dispergiert werden kann. Für die weitere Dispergierung, die hier Feindispergierung genannt wird, muß eine Rührwerkskugelmühle oder eine ähnliche Mahlvor¬ richtung eingesetzt werden.Often, however, only a predispersion of the dissolver can be carried out, i. that is, the dispersed material can only be dispersed to a certain degree of fineness. For the further dispersion, which is called fine dispersion here, an agitator ball mill or a similar grinding device must be used.
Beim Wechsel von der Vordispergierung zur Feindispergierung müssen entweder die Behälter, welche das Dispergiergut ent¬ halten, die jeweilige Antriebsvorrichtung für die Maschine oder die Werkzeuge ausgewechselt werden, oder das Dispergier¬ gut muß aus dem Behälter gepumpt und einer separaten Rühr¬ werkskugelmühle zugeführt werden.When changing from predispersion to fine dispersion, either the containers containing the material to be dispersed, the respective drive device for the machine or the tools must be exchanged, or the material to be dispersed must be pumped out of the container and fed to a separate agitator ball mill.
Bei einem Produktwechsel, wie z. B. einem Farbwechsel von ro¬ ter Farbe zu weißer Farbe, müssen zudem die gesamten Anlagen gereinigt werden. Bei der Reinigung der Kugelmühle ist das Trenn- und Dichtungssystem schwer zu reinigen. Der Wechsel- und der Reinigungsprozeß erzeugen so hohe Leerlaufzeiten und Kosten.When changing products, e.g. B. a color change from red color to white color, the entire systems must also be cleaned. When cleaning the ball mill that is Separation and sealing system difficult to clean. The changing and cleaning processes generate high idle times and costs.
Aufgabe der vorliegenden Erfindung ist es nunmehr, die aus dem Stand der Technik bekannte Rührwerkskugelmühle bautechnisch zu vereinfachen und ihren Einsatzbereich zu erweitern.The object of the present invention is to simplify the construction of the agitator ball mill known from the prior art and to expand its field of application.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das Ge- häuse der Mahlvorrichtung in Form eines Ringkanals ausgebildet ist, das ein zentrales Loch aufweist, und die Welle durch das zentrale Loch des Ringkanals verläuft.According to the invention, this object is achieved in that the housing of the grinding device is designed in the form of an annular channel which has a central hole and the shaft runs through the central hole of the annular channel.
In einer bevorzugten Ausführungsform der erfindungsgemäßen Dispergiervorrichtung weist das Gehäuse des Ringkanals ein offenes Profil auf, und die Rührwerksvorrichtung ist über min¬ destens einen Verbindungssteg, der durch das offene Profil verläuft, mit der Welle verbindbar. Es ist jedoch auch denk¬ bar, daß das Gehäuse geschlossen ausgeführt ist und die in dem Gehäuse angeordnete Rührwerksvorrichtung durch einen außerhalb des Gehäuses angeordneten Antrieb, wie zum Beispiel einem elektromagnetischen Antrieb, in Rotation versetzt wird. Alter¬ native Ausgestaltungen des Antriebs sind denkbar und richten sich nach dem Einsatzgebiet der Dispergiervorrichtung.In a preferred embodiment of the dispersing device according to the invention, the housing of the ring channel has an open profile, and the agitator device can be connected to the shaft via at least one connecting web which runs through the open profile. However, it is also conceivable that the housing is designed to be closed and the agitator device arranged in the housing is set in rotation by a drive arranged outside the housing, such as an electromagnetic drive. Alternative configurations of the drive are conceivable and depend on the field of application of the dispersing device.
Durch die erfindungsgemäße Ausgestaltung der Dispergiervor¬ richtung kann die Antriebswelle für die Strömungserzeugungs¬ vorrichtung zentral entlang der Rotationsachse des Siebkorbes verlaufen. Dadurch wird der strömungstechnische Vorteil der zentralen Anordnung der Strömungserzeugungsvorrichtung beibe¬ halten.Due to the configuration of the dispersing device according to the invention, the drive shaft for the flow generating device can run centrally along the axis of rotation of the screen basket. This maintains the fluidic advantage of the central arrangement of the flow generating device.
Auf den Einsatz des Trenn- und DichtungsSystems kann voll¬ ständig verzichtet werden, da das Gehäuse der Mahlvorrichtung nicht von der Welle durchdrungen wird. Die Reinigung der Mahl¬ vorrichtung ist wesentlich leichter und schneller zu voll¬ ziehen. In einer weiteren vorteilhaften Ausgestaltung der erfindungs¬ gemäßen Dispergiervorrichtung weist das Gehäuse des Ringkanals ein offenes Profil auf, die Rührwerksvorrichtung ist durch eine zweite Welle antreibbar und die Rührwerksvorrichtung ist über mindestens einen Verbindungssteg, der durch das offene Profil verläuft, mit einer weiteren Welle verbindbar.The use of the separation and sealing system can be completely dispensed with, since the housing of the grinding device is not penetrated by the shaft. The cleaning of the grinding device is much easier and quicker to carry out. In a further advantageous embodiment of the dispersing device according to the invention, the housing of the ring channel has an open profile, the agitator device can be driven by a second shaft and the agitator device can be connected to a further shaft via at least one connecting web which runs through the open profile.
Die weitere Welle ist vorzugsweise als Hohlwelle ausgestaltet, welche die Welle der Strömungserzeugungsvorrichtung um- schließt. Auf diese Weise kann die außenliegende Hohlwelle die in dem Gehäuse der Mahlvorrichtung angeordnete Rührwerksvor¬ richtung auf besonders einfache Art und Weise unabhängig von der Drehzahl der Antriebswelle der Strömungserzeugungsvor¬ richtung antreiben. Es können beide Wellen gleichzeitig oder jede separat voneinander angetrieben werden oder sogar im ent¬ gegengesetzten Drehsinn. Selbstverständlich ist auch eine ki¬ nematische Umkehr innerhalb der Mahlvorrichtung möglich, d. h., daß die gesamte Mahlvorrichtung relativ zu der fest¬ stehenden Rührwerksvorrichtung drehbar ist.The further shaft is preferably designed as a hollow shaft which encloses the shaft of the flow generating device. In this way, the external hollow shaft can drive the agitator device arranged in the housing of the grinding device in a particularly simple manner, irrespective of the speed of the drive shaft of the flow generating device. Both shafts can be driven simultaneously or each separately from one another or even in the opposite direction of rotation. Of course, a kinematic reversal within the grinding device is also possible. That is, the entire grinding device is rotatable relative to the fixed agitator device.
Die Rührwerksvorrichtung ist in Abhängigkeit von der Disper- gieraufgabe beliebig gestaltbar. Sie kann z. B. als Kreisring¬ scheibe, Kreisringlochscheibe, Schlitzscheibe, Stifte u. ä. ausgebildet sein.The agitator device can be designed as desired depending on the dispersion task. You can e.g. B. as a circular ring disk, circular ring perforated disk, slotted disk, pins and. Ä. Be trained.
Vorzugsweise weist die Rührwerksvorrichtung mindestens eine koaxial zum Ringkanal verlaufende Kreisringscheibe auf, die sich im Ringkanal erstreckt. Die Rührwerksvorrichtung gewährt damit eine kontinuierliche Bewegung des in dem Gehäuse ange- ordneten Mahlmediums.The agitator device preferably has at least one circular disk which extends coaxially to the ring channel and extends in the ring channel. The agitator device thus ensures a continuous movement of the grinding medium arranged in the housing.
In einer weiteren vorteilhaften Ausgestaltung der Erfindung weist die Strömungserzeugungsvorrichtung Mittel zum Dispergie¬ ren auf. Besonders vorteilhaft ist es dabei, wenn diese Mittel zum Dispergieren als Dissolverscheibe ausgebildet sind. Die Dissolverscheibe erzeugt dann zum einen die für den Betrieb der Dispergiervorrichtung notwendige Strömung und nimmt zudem eine Vordispergierung des Mahlmediums vor. Die Dissolverschei- be erfüllt eine besonders wichtige Aufgabe für die Dispergie¬ rung, nämlich die gleichmäßige Produktumwälzung bis in die Randzone des Mischbehälters. Eine Dissolverscheibe erfüllt die Aufgaben des Dispergierens, also das Auflösen von Agglomeraten und die Benetzung der Primärteilchen in der flüssigen Phase, auf besonders wirtschaftliche Art und Weise, da die Dispergie¬ rung deutlich schneller vollzogen wird als innerhalb der Mahl¬ vorrichtung.In a further advantageous embodiment of the invention, the flow generating device has means for dispersing. It is particularly advantageous if these dispersing means are designed as a dissolver disk. The dissolver disc then generates the flow necessary for the operation of the dispersing device and also predisperses the grinding medium. The dissolver be fulfills a particularly important task for the dispersion, namely the uniform product circulation down to the edge zone of the mixing container. A dissolver disc fulfills the tasks of dispersing, that is to say dissolving agglomerates and wetting the primary particles in the liquid phase, in a particularly economical manner, since the dispersion is carried out significantly more quickly than within the grinding device.
Die erfindungsgemäße Dispergiervorrichtung ist vorzugsweise so ausgestaltet, daß die Mahlvorrichtung höhenverstellbar ist und diese mittels der Höhenverstellung in das Dispergiergut ein¬ tauchbar und aus diesem wieder vollständig entfernbar ist. Auf diese Weise lassen sich die einzelnen Verfahrensschritte des Vor- und Feindispergierens vollständig getrennt voneinander durchführen, ohne daß dabei die zu dispergierenden Substanzen aus dem Behälter entfernt werden müssen oder eine Änderung der Rührwerksvorrichtungen notwendig ist. Ein Wechsel zwischen Vordispergierung und Feindispergierung kann besonders schnell und wirtschaftlich vollzogen werden. Getrennte Behälter und Antriebsvorrichtungen für einen Dissolver und eine Rührwerks¬ kugelmühle entfallen.The dispersing device according to the invention is preferably designed in such a way that the height of the grinding device is adjustable and it can be immersed in the dispersed material by means of the height adjustment and can be removed completely from the latter. In this way, the individual process steps of predispersion and fine dispersion can be carried out completely separately from one another without the substances to be dispersed having to be removed from the container or a change in the agitator devices being necessary. A change between predispersion and fine dispersion can be carried out particularly quickly and economically. There are no separate containers and drive devices for a dissolver and an agitator ball mill.
In der erfindungsgemäßen Dispergiervorrichtung können beide Verfahren, das Vordispergieren mittels der Dissolverscheibe und das Feindispergieren mittels der Rührwerkskugelmühle, im Zirkulationsverfahren durchgeführt werden. Die Verfahren kön¬ nen dabei getrennt oder gleichzeitig vollzogen werden. Be¬ sonders letztere Variante ist in der erfindungsgemäßen Disper- giervorrichtung besonders einfach und wirtschaftlich reali¬ sierbar, da ein Wechsel der Rührgeräte oder Behälter zwischen der Vordispergierung und der sich anschließenden Feindisper¬ gierung in der Mahlvorrichtung entfällt.In the dispersing device according to the invention, both methods, predispersion using the dissolver disc and finely dispersing using the agitator ball mill, can be carried out using the circulation method. The methods can be carried out separately or simultaneously. The latter variant in particular is particularly simple and economically feasible in the dispersion device according to the invention, since there is no need to change the stirrers or containers between the predispersion and the subsequent fine dispersion in the grinding device.
Vorzugsweise werden beide Wellen durch ein und denselben Motor angetrieben, wodurch der operative Aufbau deutlich vereinfacht wird. Oberhalb der Dispergiervorrichtung sind dann geeignete Getriebemittel vorgesehen, die es ermöglichen, die beiden Wellen separat voneinander oder parallel zueinander anzutrei¬ ben.Both shafts are preferably driven by one and the same motor, which significantly simplifies the operational structure. Suitable gear means are then provided above the dispersing device, which make it possible for the two Shafts separately from each other or parallel to each other.
In der besonders bevorzugten Ausführungsform der erfindungs- gemäßen Dispergiervorrichtung weist der Ringkanal einen recht¬ eckigen Querschnitt auf. Selbstverständlich sind auch alle an¬ deren geeigneten Querschnittsformen des Ringkanals denkbar, wie z. B. ein runder Querschnitt. Die Querschnittsform des Ringkanals richtet sich im wesentlichen nach den benötigten Strömungseigenschaften.In the particularly preferred embodiment of the dispersing device according to the invention, the ring channel has a rectangular cross section. Of course, all other suitable cross-sectional shapes of the ring channel are also conceivable, such as. B. a round cross-section. The cross-sectional shape of the ring channel depends essentially on the required flow properties.
Die Erfindung ist in der Zeichnung beispielsweise veranschau¬ licht und im nachstehenden anhand der Zeichnung beschrieben. Es zeigen:The invention is illustrated in the drawing, for example, and is described below with reference to the drawing. Show it:
Fig. 1 eine Frontansicht im Schnitt durch die erfindungsge¬ mäße Dispergiervorrichtung bei der Vordispergierung,1 is a front view in section through the dispersing device according to the invention during predispersion,
Fig. 2 die gleiche Ansicht wie in Fig. 1 bei abgesenkter Rührwerkskugelmühle bei der Feindispergierung,2 shows the same view as in FIG. 1 with the agitator ball mill lowered during fine dispersion,
Fig. 3 die gleiche Ansicht wie in Fig. 1 bei der Reinigung der Dispergiervorrichtung undFig. 3 shows the same view as in Fig. 1 when cleaning the dispersing device and
Fig. 4 eine Frontansicht einer alternativen Ausführungsform der erfindungsgemäßen Dispergiervorrichtung.Fig. 4 is a front view of an alternative embodiment of the dispersing device according to the invention.
Wie aus Fig. 1 zu entnehmen ist, besteht die erfindungsgemäße Dispergiervorrichtung aus einem im wesentlichen zylindrischen, doppelwandigen, mit einem Deckel verschlossenen Behälter 1, einem Dissolver 2, einer Rührwerkskugelmühle 3 und mehreren Reinigungsdüsen 4.As can be seen from FIG. 1, the dispersing device according to the invention consists of an essentially cylindrical, double-walled container 1 closed with a lid, a dissolver 2, an agitator ball mill 3 and several cleaning nozzles 4.
Der Dissolver besteht aus einer zylindrischen Welle 21, die an ihrem unteren Ende eine Dissolverscheibe 22 aufweist. Die Dis¬ solverscheibe ist entlang ihres Umfangs mit mehreren auf der Kreisfläche alternierend nach oben und nach unten gebogenen Zähnen 23 ausgestattet. 97/09115 PCΪ7DE96/01695The dissolver consists of a cylindrical shaft 21 which has a dissolver disk 22 at its lower end. The circumferential disc is equipped with a plurality of teeth 23 alternately curved upwards and downwards on the circular surface. 97/09115 PCΪ7DE96 / 01695
88th
Die Rührwerkskugelmühle 3 besteht aus einem siebartig perfo¬ rierten Gehäuse 31, in dem die Mahlkugeln 32 gehalten werden. Das Gehäuse 31 ist an seiner oberen Seite mit einer ringsum¬ laufenden Öffnung 33 versehen. Das Gehäuse 31 ist in dem dar- gestellten Beispiel einwandig ausgebildet, kann aber alterna¬ tiv auch doppelwandig oder in anderer geeigneter Art und Weise ausgeführt sein.The agitator ball mill 3 consists of a sieve-like perforated housing 31 in which the grinding balls 32 are held. The housing 31 is provided on its upper side with an opening 33 running all around. The housing 31 is single-walled in the example shown, but can alternatively also be double-walled or in another suitable manner.
Das Gehäuse bildet einen torusförmigen Ringkanal mit einem zentralen Loch 34. Die Welle 21 des Dissolvers 2 verläuft durch dieses Loch 34. Innerhalb des Ringkanals befinden sich zwei koaxial zum Ringkanal verlaufende Kreisringscheiben 35. Die Kreisringscheiben 35 sind durch einen Steg 36 miteinander verbunden. Der Steg 36 verbindet daneben die Kreisringscheiben 35 mit der Hohlwelle 37. Die Hohlwelle 37 wird wie die Welle 21 von einem nicht näher dargestellten Motor angetrieben. Die Hohlwelle 37 und die Welle 21 verlaufen koaxial zueinander, wobei die Welle 21 innerhalb der Hohlwelle 37 verläuft.The housing forms a toroidal ring channel with a central hole 34. The shaft 21 of the dissolver 2 runs through this hole 34. Inside the ring channel there are two circular ring disks 35 which run coaxially to the ring channel. The ring disks 35 are connected to one another by a web 36. The web 36 also connects the annular disks 35 to the hollow shaft 37. Like the shaft 21, the hollow shaft 37 is driven by a motor (not shown in more detail). The hollow shaft 37 and the shaft 21 run coaxially with one another, the shaft 21 running inside the hollow shaft 37.
Der Behälter 1 ist an seiner Wand mit mehreren Reinigungsdüsen 4 versehen. Jede Reinigungsdüse 4 besteht aus einem Sprühkopf 41, einem an der Wand des Behälters 1 befestigten Hohlzylinder 42 und einem in dem Hohlzylinder 42 geführten Kolben 43, der an seinem zur Mitte des Behälters 1 gerichteten Ende einen Sprühkopf 41 aufweist.The container 1 is provided on its wall with a plurality of cleaning nozzles 4. Each cleaning nozzle 4 consists of a spray head 41, a hollow cylinder 42 fastened to the wall of the container 1 and a piston 43 guided in the hollow cylinder 42, which has a spray head 41 at its end facing the center of the container 1.
Die Kugelmühle 3 wird an ihrer Umfangsseite von Stangen 39 ge¬ halten, mittels derer sie durch eine nicht näher dargestellte Antriebsvorrichtung in ihrer Höhe verstellt werden kann. Die Stangen 39 sind derart befestigt, daß sie die Höhenverstellung der Rührwerkskugelmühle ermöglichen, dabei aber deren Rotation nicht behindern.The ball mill 3 is held on its circumferential side by rods 39, by means of which it can be adjusted in height by a drive device (not shown in more detail). The rods 39 are fastened in such a way that they enable the height adjustment of the agitator ball mill, but do not hinder its rotation.
In der Fig. 1 ist die Rührwerkskugelmühle 3 in ihrer oberen Position, so daß diese mit dem Dispergiergut 5 nicht in Ver¬ bindung kommt. Die Hohlwelle 37 wird in dieser Position nicht angetrieben. Die Vordispergierung wird lediglich durch die Ro¬ tation des Dissolvers 2 bewirkt, der dabei auch in seiner Höhe verstellt werden kann, um die geeigneten Prozeßbedingungen zu gewährleisten. Auf diese Weise kann sich der bei der Vor¬ dispergierung gewünschte "Doughnut-Effekt" einstellen. Die Zirkulation des Dispergiergutes 5 (durch Pfeile dargestellt) wird durch die Rührwerkskugelmühle 3 nicht behindert, so daß eine effiziente und schnelle Vordispergierung durch den Dis¬ solver 2 vollzogen wird.1, the agitator ball mill 3 is in its upper position so that it does not come into contact with the dispersed material 5. The hollow shaft 37 is not driven in this position. The predispersion is only effected by the rotation of the dissolver 2, the height of which also occurs can be adjusted to ensure the appropriate process conditions. In this way, the “donut effect” desired in the pre-dispersion can be established. The circulation of the dispersed material 5 (represented by arrows) is not hindered by the agitator ball mill 3, so that an efficient and rapid predispersion is carried out by the disperser 2.
In der Fig. 2 ist die Rührwerkskugelmühle 3 in ihrer abgesenk- ten Position dargestellt. Die Rührwerkskugelmühle 3 wird innerhalb des Behälters 1 durch die Stangen 39 mit der Hohl¬ welle 37 höhenverstellt und in das Dispergiergut 5 eingesenkt. Die Rührwerkskugelmühle 3 ist in das Dispergiergut 5 voll¬ ständig eingetaucht, und die Kreisringscheiben 35 werden durch die Hohlwelle 37 im Verhältnis zum Gehäuse 31 der Rührwerks¬ kugelmühle 3 in Rotation versetzt. Die Kreisringscheiben 35 setzen die Mahlkugeln 32 in Bewegung, so daß der Mahlprozeß innerhalb der Rührwerkskugelmühle 3 vollzogen wird. Der Dis¬ solver 2 sorgt weiterhin für eine Zirkulation (durch Pfeile dargestellt) des Dispergiergutes 5, jedoch wird jetzt vorzugs¬ weise auch eine Zirkulation durch das siebartig perforierte Gehäuse der Rührwerkskugelmühle 3 bewirkt. Dadurch wird eine Feindispergierung durch die Rührwerkskugelmühle 3 im Zirkula¬ tionsverfahren vollzogen.The agitator ball mill 3 is shown in its lowered position in FIG. 2. The agitator ball mill 3 is adjusted in height within the container 1 by the rods 39 with the hollow shaft 37 and sunk into the dispersed material 5. The agitator ball mill 3 is completely immersed in the dispersed material 5, and the annular discs 35 are set in rotation by the hollow shaft 37 in relation to the housing 31 of the agitator ball mill 3. The annular discs 35 set the grinding balls 32 in motion so that the grinding process within the agitator ball mill 3 is carried out. The disperser 2 also ensures circulation (represented by arrows) of the dispersed material 5, but circulation is now also preferably effected through the sieve-like perforated housing of the agitator ball mill 3. As a result, fine dispersion is carried out by the agitator ball mill 3 in the circulation process.
In der Fig. 3 wird die Reinigung der erfindungsgemäßen Disper¬ giervorrichtung nach dem Abpumpen des Dispergiergutes durch eine geeignete, nicht abgebildete Abpumpvorrichtung darge¬ stellt. Zur Reinigung werden die entlang der Wand des Behäl- ters 1 angeordneten Sprühköpfe 41 in den Innenraum des Behäl¬ ters eingeschoben. Dieses erfolgt, indem die Kolben 43 inner¬ halb der Hohlzylinder 42 axial entlang ihrer Längsachse zum Zentrum des Behälters 1 hin verschoben werden. Die Kolben 43 sind innen hohl und führen die Reinigungsflüssigkeit durch ein nicht näher dargestelltes Druckerzeugungsmittel zu den Sprüh¬ köpfen 41. Die Sprühköpfe 41 sprühen Reinigungsmittel durch zweckmäßig ausgestaltete Öffnungen in daε Innere des Behälters 1 ein. Auf diese Weise werden zunächst die Wände und Vorrich- tungen abgesprüht, und es kommt im weiteren Verlauf zu einem Auffüllen des Behälters 1 mit der Reinigungsflüssigkeit. Die an dem Dissolver 2 und der Rührwerkskugelmühle 3 haftenden Partikel des Dispergiergutes 5 werden durch das Reinigungs- mittel von der Dispergiervorrichtung gelöst. Es bildet sich eine Mischung aus Reinigungsmittel und Dispergiergut 5 am Boden des Behälters 1, die hier Reinigungsflüssigkeit 6 ge¬ nannt wird. Der Dissolver 2 und die Rührwerkskugelmühle 3 werden in der Reinigungsflüssigkeit 6 wie zuvor rotiert, aber dieses Mal zur Reinigung der Bauteile. Das zentrale Loch 34 der Rührwerkskugelmühle 3 vergrößert dabei - im Vergleich zum Stand der Technik - die Oberfläche des Gehäuses, durch welche die Reinigungsflüssigkeit 6 in das Innere der Rührwerkskugel¬ mühle 3 eintreten bzw. durch diese hindurchtreten kann. Der Reinigungsprozeß wird durch die Ausgestaltung der Rührwerks¬ kugelmühle 3 mit einem zentralen Loch 34 somit beschleunigt.3 shows the cleaning of the dispersing device according to the invention after the dispersed material has been pumped out by means of a suitable pump device, not shown. For cleaning purposes, the spray heads 41 arranged along the wall of the container 1 are pushed into the interior of the container. This is done by displacing the pistons 43 within the hollow cylinder 42 axially along their longitudinal axis towards the center of the container 1. The pistons 43 are hollow on the inside and guide the cleaning liquid to the spray heads 41 through a pressure generating means (not shown in more detail). The spray heads 41 spray cleaning agents through appropriately designed openings into the interior of the container 1. In this way, the walls and devices are first lines sprayed, and in the further course there is a filling of the container 1 with the cleaning liquid. The particles of the dispersed material 5 adhering to the dissolver 2 and the agitator ball mill 3 are detached from the dispersing device by the cleaning agent. A mixture of cleaning agent and dispersed material 5 forms at the bottom of the container 1, which is called cleaning liquid 6 here. The dissolver 2 and the agitator ball mill 3 are rotated in the cleaning liquid 6 as before, but this time for cleaning the components. The central hole 34 of the agitator ball mill 3 increases - in comparison to the prior art - the surface of the housing through which the cleaning liquid 6 can enter or pass through the inside of the agitator ball mill 3. The cleaning process is thus accelerated by the design of the agitator ball mill 3 with a central hole 34.
Die Reinigungsdüsen 4 können auch so ausgestaltet sein, daß diese beim Sprühvorgang bis in das Innere des Loches 34 der Rührwerkskugelmühle 3 reichen und so ein Besprühen der inneren Peripherie der Rührwerkskugelmühle 3 vollziehen, oder derart angeordnet sein, daß sie alternierend die äußere und die inne¬ re Peripherie der Rührwerkskugelmühle 3 besprühen. Es können auch geeignete Löcher in der Hohlwelle 21 ausgestaltet sein, durch welche ein Reinigungsmittel eingesprüht wird.The cleaning nozzles 4 can also be designed such that they extend into the interior of the hole 34 of the agitator ball mill 3 during the spraying process and thus spray the inner periphery of the agitator ball mill 3, or be arranged such that they alternate the outer and the inner ones Spray the periphery of the agitator ball mill 3. Suitable holes can also be formed in the hollow shaft 21, through which a cleaning agent is sprayed.
Nach dem Reinigungsprozeß wird die Reinigungsflüssigkeit 6 ab¬ gepumpt, die Reinigungsdüsen 4 werden aus dem Behälter 1 gezo¬ gen und die Rührwerkskugelmühle 3 wird mittels der Stange 39 in ihre obere Position verfahren. Die Dispergiervorrichtung ist so wieder einsatzbereit.After the cleaning process, the cleaning liquid 6 is pumped off, the cleaning nozzles 4 are pulled out of the container 1 and the agitator ball mill 3 is moved into its upper position by means of the rod 39. The dispersing device is ready for use again.
In der Fig. 4 ist eine alternative Ausführungsform der erfin¬ dungsgemäßen Dispergiervorrichtung dargestellt. Eine einzige Welle 44 treibt sowohl die Kreisringscheiben 35 als auch die an ihrem unteren Ende versehene Dissolverscheibe 22 an. Diese Ausführungsform stellt die einfachste und kostengünstigste Realisierung der erfindungsgemäßen Dispergiervorrichtung dar. Die hier dargestellten Ausführungsbeispiele betreffen allesamt Diεpergiervorrichtungen, bei denen das Gehäuse stillstehend und die Rührwerksvorrichtung relativ zu diesem Gehäuse drehbar angeordnet ist. Es liegt auch im Rahmen der Erfindung, die Dispergiervorrichtung kinematisch umgekehrt auszubilden. Bei einer solchen Dispergiervorrichtung ist die Strömungserzeu¬ gungsvorrichtung stillstehend ausgebildet, während das Gehäuse relativ zu der stillstehenden Rührwerksvorrichtung gedreht wird. Der Antrieb des Gehäuses der Rührwerksvorrichtung und/oder der Strömungserzeugungsvorrichtung erfolgt über ge¬ eignete, dem Fachmann bekannte Antriebsmittel, so zum Beispiel mechanische, elektrische oder magnetische Antriebe.4 shows an alternative embodiment of the dispersing device according to the invention. A single shaft 44 drives both the annular disks 35 and the dissolver disk 22 provided at its lower end. This embodiment represents the simplest and cheapest implementation of the dispersing device according to the invention. The exemplary embodiments shown here all relate to dispersing devices in which the housing is stationary and the agitator device is arranged rotatably relative to this housing. It is also within the scope of the invention to design the dispersing device to be kinematically reversed. In such a dispersing device, the flow generating device is designed to be stationary while the housing is rotated relative to the stationary agitator device. The housing of the agitator device and / or the flow generating device is driven by suitable drive means known to the person skilled in the art, for example mechanical, electrical or magnetic drives.
Durch die erfindungsgemäße Dispergiervorrichtung werden ein Dissolver und eine Rührwerkskugelmühle in einer Vorrichtung kombiniert. Die Vorteile der aus dem Stand der Technik zentral im Behälter angeordneten Strömungserzeugungsvorrichtung werden beibehalten. Daneben wird erfindungsgemäß eine Durchdringung der Rührwerkskugelmühle durch die Antriebswelle des Dissolvers vermieden. Der Wechsel von der Vor- zur Feindispergierung wird vereinfacht und beschleunigt . Zudem ist eine Anordnung von beiden Vorrichtungen als vollkommen geschlossenes System auf geringstem Raum realisierbar. Lösungsmittel können bei demThe dispersing device according to the invention combines a dissolver and an agitator ball mill in one device. The advantages of the flow generation device arranged centrally in the container from the prior art are retained. In addition, according to the invention, penetration of the agitator ball mill by the drive shaft of the dissolver is avoided. The change from pre-dispersion to fine dispersion is simplified and accelerated. In addition, an arrangement of both devices as a completely closed system can be realized in the smallest space. Solvents can
Verfahrenswechsel deshalb nicht entweichen. Therefore, change of procedure does not escape.
BezuqszeichenlisteReference list
1 Behälter 2 Dissolver1 container 2 dissolvers
3 Rührwerkskugelmühle3 agitator ball mill
4 Reinigungsdüse4 cleaning nozzle
5 Dispergiergut5 dispersed material
6 Reinigungsflüssigkeit 21 Welle6 cleaning fluid 21 shaft
22 Dissolverscheibe22 dissolver disc
23 Zähne23 teeth
31 Gehäuse31 housing
32 Mahlkugeln 33 Öffnung32 grinding balls 33 opening
34 Loch34 holes
35 Kreisringscheibe35 circular washer
36 Steg36 bridge
37 Hohlwelle 39 Stange37 hollow shaft 39 rod
41 Sprühkopf41 spray head
42 Hohlzylinder42 hollow cylinders
43 Kolben43 pistons
44 Welle 44 wave

Claims

Patentansprüche claims
1. Dispergiervorrichtung, bestehend aus einem Behälter zur Aufnahme und Bearbeitung des Dispergiergutes, einer durch eine Welle antreibbaren Strömungserzeugungsvorrichtung, einer ein Mahlmedium enthaltenden Mahlvorrichtung mit einem Gehäuse mit Öffnungen, durch welche die zu disper¬ gierenden Substanzen aufgrund der durch die Strömungser- zeugungsvorrichtung erzeugten Strömung hindurchtreten können, und einer in dem Gehäuse angeordneten und relativ zu diesem drehbaren Rührwerksvorrichtung, d a d u r c h g e k e n n z e i c h n e t, daß das Gehäuse (31) der Mahlvorrichtung in Form eines Ringskanals ausgebildet ist, der ein zentrales Loch (34) aufweist, und die Welle (21) durch das zentrale Loch (34) des Ringkanals verläuft.1. Dispersing device, consisting of a container for receiving and processing the dispersed material, a flow generating device drivable by a shaft, a grinding device containing a grinding medium with a housing with openings through which the substances to be dispersed due to the flow generated by the flow generating device can pass through, and in the housing and rotatable relative to this agitator device, characterized in that the housing (31) of the grinding device is in the form of an annular channel having a central hole (34), and the shaft (21) through the central hole (34) of the ring channel runs.
2. Dispergiervorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Gehäuse (31) des Ringkanals ein offenes Profil aufweist, und die Rührwerks¬ vorrichtung über mindestens einen Verbindungssteg (36), der durch das offene Profil verläuft, mit der Welle ver¬ bindbar ist.2. Dispersing device according to claim 1, so that the housing (31) of the ring channel has an open profile, and the stirrer device can be connected to the shaft via at least one connecting web (36) which runs through the open profile.
3. Dispergiervorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Gehäuse (31) des Ringkanals ein offenes Profil aufweist, die Rührwerksvor¬ richtung durch eine weitere Welle (37) antreibbar ist, und die Rührwerksvorrichtung über mindestens einen Verbin- dungssteg (36), der durch das offene Profil verläuft, mit der weiteren Welle (37) verbindbar ist. 3. Dispersing device according to claim 1, characterized in that the housing (31) of the ring channel has an open profile, the stirrer device can be driven by a further shaft (37), and the stirrer device via at least one connecting web (36) which runs through the open profile, can be connected to the further shaft (37).
4. Dispergiervorrichtung nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t, daß die weitere Welle (37) eine Hohlwelle ist, die die Welle (21) der Stömungserzeu- gungsvorrichtung umschließt.4. Dispersing device according to claim 3, so that the further shaft (37) is a hollow shaft that surrounds the shaft (21) of the flow generating device.
5. Dispergiervorrichtung nach einem der Ansprüche 3 oder 4, d a d u r c h g e k e n n z e i c h n e t, daß die Wel¬ len (21 und 37) durch einen gemeinsamen Motor antreibbar sind.5. Dispersing device according to one of claims 3 or 4, d a d u r c h g e k e n n z e i c h n e t that the shafts (21 and 37) can be driven by a common motor.
6. Dispergiervorrichtung nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t, daß die Rühr¬ werksvorrichtung mindestens eine koaxial zum Ringkanal verlaufende Kreisringscheibe (35) aufweist, die im Ring- kanal angeordnet ist.6. Dispersing device according to one of claims 1 to 5, so that the agitator device has at least one annular disc (35) which runs coaxially with the annular channel and is arranged in the annular channel.
7. Dispergiervorrichtung nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, daß die Mahl¬ vorrichtung höhenverstellbar ist.7. Dispersing device according to one of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t that the grinding device is adjustable in height.
8. Dispergiervorrichtung nach Anspruch 7, d a d u r c h g e k e n n z e i c h n e t, daß die Mahlvorrichtung mit¬ tels der Höhenverstellung in das Dispergiergut (5) ein¬ tauchbar und aus diesem wieder vollständig entfernbar ist.8. Dispersing device according to claim 7, so that the grinding device can be immersed in the dispersed material (5) by means of the height adjustment and can be completely removed therefrom.
9. Dispergiervorrichtung nach einem der Ansprüche 1 bis 8, d a d u r c h g e k e n n z e i c h n e t, daß die Strö¬ mungserzeugungsvorrichtung Mittel zum Dispergieren auf¬ weist.9. Dispersing device according to one of claims 1 to 8, d a d u r c h g e k e n n z e i c h n e t that the flow generating device has means for dispersing.
10. Dispergiervorrichtung nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t, daß die Mittel zum Dispergie¬ ren als Dissolverscheibe (22) ausgebildet sind.10. Dispersing device according to claim 9, d a d u r c h g e k e n e z e i c h n e t that the means for Dispergie¬ ren are designed as a dissolver disc (22).
11. Dispergiervorrichtung nach einem der Ansprüche 1 bis 10, d a d u r c h g e k e n n z e i c h n e t, daß das Ge¬ häuse (31) des Ringkanals einen rechteckigen Querschnitt aufweist. 11. Dispersing device according to one of claims 1 to 10, characterized in that the Ge housing (31) of the annular channel has a rectangular cross section.
12. Verfahren zur Vor- und Feindispergierung eines fein- und feinstteiligen, festen Stoffes in einem Dispersionsmittel in einem Behälter, wobei die Vordispergierung mittels eines Dissolvers und die Feindispergierung mittels einer Rührwerkskugelmühle erfolgt, d a d u r c h g e k e n n ¬ z e i c h n e t, daß Vor- und Feindispergierung wahlweise gleichzeitig oder nacheinander durchgeführt werden.12. A method for pre-and fine dispersion of a fine and very fine-particle, solid substance in a dispersant in a container, the predispersion using a dissolver and the fine dispersion using a stirred ball mill, characterized ¬ characterized in that pre-and fine dispersion optionally at the same time or in succession be performed.
13. Verfahren nach Anspruch 12, d a d u r c h g e k e n n - z e i c h n e t, daß der Dissolver (22) und/oder die Rühr¬ werkskugelmühle (3) unter koaxialer Verschiebung auf das Dispergiergut (5) zur Einwirkung gebracht werden.13. The method of claim 12, d a d u r c h g e k e n n - z e i c h n e t that the dissolver (22) and / or the agitator ball mill (3) are brought to bear on the dispersed material (5) with coaxial displacement.
14. Verfahren nach Anspruch 12 oder 13, d a d u r c h g e - k e n n z e i c h n e t, daß mittels des Dissolvers (2) eine Vordispergierung durchgeführt wird, die Rührwerks¬ kugelmühle (3) nach einer vorgegebenen Zeit entlang der gemeinsamen Achse in dem Behälter (1) abgesenkt und mit dem Dispergiergut (5) zur Einwirkung gebracht wird. 14. The method according to claim 12 or 13, dadurchge - indicates that by means of the dissolver (2) a predispersion is carried out, the Rührwerks¬ ball mill (3) after a predetermined time along the common axis in the container (1) and lowered with the Dispersed material (5) is brought into effect.
EP96938007A 1995-09-09 1996-09-05 Dispersing device and process Expired - Lifetime EP0850106B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9630185T SI0850106T1 (en) 1995-09-09 1996-09-05 Dispersing device and process

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19533369 1995-09-09
DE19533369A DE19533369C2 (en) 1995-09-09 1995-09-09 Dispersing device and method
PCT/DE1996/001695 WO1997009115A2 (en) 1995-09-09 1996-09-05 Dispersing device and process

Publications (2)

Publication Number Publication Date
EP0850106A1 true EP0850106A1 (en) 1998-07-01
EP0850106B1 EP0850106B1 (en) 2000-03-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96938007A Expired - Lifetime EP0850106B1 (en) 1995-09-09 1996-09-05 Dispersing device and process

Country Status (11)

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US (1) US5967430A (en)
EP (1) EP0850106B1 (en)
JP (1) JP2949373B2 (en)
AT (1) ATE191159T1 (en)
DE (2) DE19533369C2 (en)
DK (1) DK0850106T3 (en)
ES (1) ES2144782T3 (en)
GR (1) GR3033701T3 (en)
PT (1) PT850106E (en)
SI (1) SI0850106T1 (en)
WO (1) WO1997009115A2 (en)

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CN109550451A (en) * 2018-09-30 2019-04-02 中国水利水电科学研究院 A kind of energy-efficient desulfurization pulping device

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Also Published As

Publication number Publication date
JP2949373B2 (en) 1999-09-13
DE19533369A1 (en) 1997-03-13
WO1997009115A2 (en) 1997-03-13
WO1997009115A3 (en) 1997-04-03
EP0850106B1 (en) 2000-03-29
DE19533369C2 (en) 1998-06-10
GR3033701T3 (en) 2000-10-31
DK0850106T3 (en) 2000-09-04
SI0850106T1 (en) 2000-08-31
US5967430A (en) 1999-10-19
ATE191159T1 (en) 2000-04-15
JPH11501573A (en) 1999-02-09
ES2144782T3 (en) 2000-06-16
DE59604847D1 (en) 2000-05-04
PT850106E (en) 2000-08-31

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