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EP1043061B1 - Dispositif de dispersion - Google Patents

Dispositif de dispersion Download PDF

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Publication number
EP1043061B1
EP1043061B1 EP00106283A EP00106283A EP1043061B1 EP 1043061 B1 EP1043061 B1 EP 1043061B1 EP 00106283 A EP00106283 A EP 00106283A EP 00106283 A EP00106283 A EP 00106283A EP 1043061 B1 EP1043061 B1 EP 1043061B1
Authority
EP
European Patent Office
Prior art keywords
dispersing
drum
suspension
dispersing device
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00106283A
Other languages
German (de)
English (en)
Other versions
EP1043061A1 (fr
Inventor
Guntram Krettek
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
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP1043061A1 publication Critical patent/EP1043061A1/fr
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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
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/94—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary cylinders or cones
    • B01F27/941—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary cylinders or cones being hollow, perforated or having special stirring elements thereon

Definitions

  • the present invention relates to a dispersing device having the features of the preamble of claim 1.
  • Dispersing devices are used to mix a particular powdery solid and a liquid together so that there is a dispersion or suspension.
  • Conventional dispersing devices are constructed so as to include a stationary container having a solids supply means, a liquid supply means and a slurry discharge means in which a rotary dispersing tool is arranged.
  • the dispersing tool is an agitator, which can be designed in different ways and can rotate at different rotational speeds.
  • a dispersing device is known.
  • the known dispersing device has a rotating drum, on the inside of which spiral grooves are arranged.
  • a solution of a surface-active substance is introduced into the drum by means of pressure and fed to the inner surface thereof, a thin foam layer forming uniformly here.
  • a solid is introduced into the drum via the solids feed device and introduced into the formed foam layer and mixed into it. The corresponding mixture then moves along the spiral grooves to the discharge device.
  • a dispersing device having the features of the preamble of claim 1 is known.
  • the solid and the liquid are mixed in advance and introduced into the drum via a feed device.
  • a feed device At the tube of the feeder there are a plurality of radially extending dispersing elements in the form of superimposed and spaced agitators.
  • the finished suspension is aspirated via a suspension discharge device in the form of a suction nozzle, which is inserted through a central opening in the upper end region of the drum.
  • the present invention has for its object to provide a dispersing specified in the preamble of claim 1 species having a particularly high efficiency.
  • the vertically arranged drum is open at the top and has an overflow for the suspension produced.
  • the suspension enters the annular gap between the rotating drum and the stationary housing wall down to the Suspensionsabloominnate, which is preferably provided on the housing bottom.
  • An essential component of the dispersing device designed according to the invention is the rotating drum arranged in the housing, by means of which a particularly good mixing or swirling effect between solid particles and liquid is achieved. As a result, dead spaces in the stationary container wall are avoided.
  • the device has the advantage that the dispersing tool can optionally be formed stationary or rotatable. Thus, the swirling effect achieved by the stationary dispersing blade can be further improved by rotating it, so that even in the central region of the drum, any dead space which may arise can be completely switched off.
  • Another advantage of the invention is that caused by the rotating drum air bubbles can be largely displaced.
  • the device therefore has an additional degassing effect.
  • the direction of rotation of the drum is preferably selectable. This also applies to the direction of rotation of the dispersing tool. For example, both can rotate in the same direction but also in opposite directions.
  • the dispersing tool As far as the formation of the dispersing tool is concerned, a variety of embodiments are possible if a turbulence or stirring effect is achieved thereby.
  • at least one dispersing blade which travels in the radial direction is provided.
  • the dispersing tool has a plurality of dispersing blades arranged one above the other, so that they largely cover the entire height of the drum.
  • the solids and / or liquid supply means may be formed as a dispersing tool.
  • corresponding dispersing vanes are arranged on the outer sides of the tubes or shafts.
  • the drum drive shaft may be provided with corresponding dispersing blades. In the latter case, the dispersing tool rotates together with the drum.
  • the dispersing tool is usually arranged stationary.
  • the Feststoffzu slaughter classroom is preferably a shaft or a tube.
  • the shaft or tube expediently extends from the upper end of the housing down into the drum so far that feed of the solid (powder) takes place in the lower part of the drum.
  • the solid feed into the tube or into the shaft can for example via a big bag or a bag emptying device and a downstream metering screw done.
  • the metering screw may extend into the well or tube. It expediently starts from a hopper. A heating of the pipe or shaft is appropriate.
  • the liquid supply device is preferably a tube, which is likewise introduced from above through the housing into the lower region of the drum.
  • the end portion of the liquid tube may be shaped accordingly to achieve a preferred liquid dispensing direction, for example against the drum wall.
  • the end region of the tube is preferably formed obliquely or horizontally.
  • the drum drive shaft extending through the drum carries a spray plate onto which the liquid feed pipe is directed, i.e.
  • the end portion of the inlet pipe extends obliquely inward toward the drum axis.
  • the Suspensionsab 2009 is preferably in the bottom of the housing. It may be a pipe, which starts from the radially outer region of the housing bottom.
  • the dispersing device has a circulation system for returning the suspension discharged through the suspension discharge device into the drum via the liquid supply device.
  • this system it is possible to recycle the produced suspension until the desired suspension quality is present.
  • solid and liquid can be metered in permanently. Upon reaching the desired suspension quality, the solid and liquid supply is stopped and the drum emptied.
  • a particularly preferred embodiment of the invention is characterized in that the dispersing device is simultaneously designed as a classifying device and has a discharge device for the classified suspension.
  • This embodiment has the great advantage that a single device is required to perform a dispersing operation and a subsequent classifying operation.
  • a conventional system for dispersing and subsequent classifying two separate devices are used for this purpose, namely on the one hand with a conventional agitator equipped with dispersing or mixing device with stationary container and on the other hand, a classifier in the form of a centrifuge.
  • the above-described dispersing device according to the invention can also be used for classifying if it is provided with a discharge device for the classified suspension or is operated in the overflow method.
  • the inner wall of the drum is preferably provided with chambers which receive the coarse fraction separated by the classification process, which is dissolved again in a subsequent purification step and, if necessary after a grinding process, reintroduced into the suspension to be classified.
  • the dispersing tool is expediently designed so that it can be used as a cleaning tool in the cleaning stage.
  • the at least one dispersing blade acts here as a cleaning knife with which the sediment is dissolved in a mechanical manner.
  • this is preferably off and foldable so that it can be activated or deactivated in the respective phase.
  • the dispersing phase it is unfolded, folded during the classifying phase and unfolded again during the subsequent cleaning phase. Collapsed means here that the wing occupies no radial position more.
  • the Feststoffzu slaughter 2015, the liquid supply and / or the discharge device for the classified suspension into the drum and again out of this movable, in particular pivotable.
  • the devices can be arranged inside or outside the drum in order to avoid disturbing influence.
  • the discharge device for the classified suspension is pivoted out of the drum during the dispersion phase and the cleaning phase.
  • Yet another embodiment of the invention is characterized in that the dispersing tool in the drum in the axial and / or radial direction is movable. This embodiment makes it possible to further increase the variability of the device, since now any points within the drum can be achieved with the dispersing tool and / or cleaning tool.
  • the suspension is withdrawn from the drum via the suspension removal device and reintroduced into the drum via the liquid feed device.
  • the liquid supply means may be provided with the at least one dispersing blade which in this embodiment at the same time designed as a cleaning knife.
  • the solution according to the invention thus provides a continuous system, so that in contrast to the prior art by the existing container geometries no fixed quantities are prescribed. According to the invention, a variation of the solids content is possible on a large scale. In the case of the combination variant, it is also possible to carry out a dilution of the suspension in the same device.
  • the dispersing and classifying process can be carried out at different speeds. Both processes can also be realized with different directions of rotation of the drum.
  • the feature can be realized that the at least one dispersing blade (cleaning knife) folds up or back in dependence on the direction of rotation. Unfolding is accomplished in the dispersing and cleaning phase, while folding back the classifying phase is achieved in which the drum rotates in opposite directions.
  • FIG. 1 The schematically shown in Figure 1 in vertical section Dispergiervoriques has a stationary housing 1, in which a vertically arranged drum 2 is provided, which is driven by a shaft 7 so that it rotates within the housing 1.
  • the drum 2 is open at the top and has an overflow shown at 12, via which the suspension produced in the drum 2 passes to a suspension discharge line 10 originating from the bottom of the housing.
  • a powder feeder with a powder hopper 4, a metering screw 5, which is arranged in a feed tube, and a powder well 6, which extends from the top into the housing 1 and into the drum 2, serves to supply a solid which is in the dispersing device to be transferred under suspension of fluid into a suspension.
  • the solid may be, for example, SiO 2 powder.
  • the powder chute 6 extends into the lower region of the drum 2 and has at its lower end a corresponding outlet opening for the powder.
  • a liquid supply means 8 in the form of a water supply pipe also extends through the top of the housing to the lower portion of the drum 2. At the lower end, the feed tube is bent radially outwardly so that the supplied water is directed radially outwardly toward the drum outer wall becomes.
  • the drum 2 has in its radially outer region a number of stacked receiving chambers 3, which are shown in Figure 1 on the right side of the drum 2. The operation of these chambers will be explained later.
  • FIG. 1 shows the dispersing blades 1 in the unfolded state in which they extend into the chambers 3 in. In addition to their Verwirbelungsfunktion these dispersing wings have a further task, which will be explained later.
  • the dispersing device shown here also serves as a classifying device and for this purpose also has a discharge device for the classified suspension, which is designed in the form of a discharge tube 9 which extends up to the upper edge region of the open drum 2.
  • the device works in the following way.
  • the prepared suspension When the prepared suspension is to be classified, it is withdrawn from the storage and passed through the feed tube 8 in the lower portion of the drum in the direction of the drum wall in a continuous process.
  • the speed of the drum 2 In the Klassierphase the speed of the drum 2 is set to Klassierwindress.
  • the unfolded dispersing vanes 11 are folded inwardly against the outer wall of the powder chute 6.
  • the drum rotates with the corresponding one Classifying speed, whereby coarse particles of the suspension to be classified are thrown outwards against the inner wall of the drum in the chambers 3 arranged there. In the chambers, a solid cake forms, which gets thicker as the classifying process progresses.
  • the classified suspension is withdrawn via the discharge pipe 9.
  • This discharge pipe 9 is otherwise pivotally formed, so that it is pivoted into the housing only in the Klassierphase.
  • the classified suspension can be recycled and introduced via the tube 8 again in the drum. If a corresponding quality of the classified suspension is achieved, the classification process is stopped. The remainder of the suspension remaining in the drum can now be withdrawn via a discharge not shown.
  • the rotating cake is released by the fixed knives.
  • the corresponding cleaning effect can be supported by supplying water through the pipe 8. It forms again in the drum 2, a suspension of coarse fraction and water, which can be removed.
  • the coarse fraction can be ground and the resulting suspension reintroduced into the system.
  • After completion of the cleaning phase can be started again with a dispersion phase.
  • the dispersing device illustrated schematically in vertical section in FIG. 2 differs from that of FIG. 1 only in a few features, so that the same reference numbers as in FIG. 1 are used to designate the same features were used.
  • the dispersing device also comprises a stationary housing 1 with a vertically arranged drum 2, which is rotated by a shaft 7.
  • a solids supply means is formed in the form of a tube 17 extending through the top of the housing 1 into the lower portion of the drum 2.
  • a metering screw 18 is arranged in the tube 17 in the tube.
  • the tube 17 is at its upper end in a hopper 19 over.
  • the metering screw 18 delivers powder into the drum.
  • the liquid supply means is formed in the form of a supply pipe 8 which also extends through the top of the housing 1 to the lower portion of the rotary drum 2. In the lower region, the tube 8 is bent obliquely inwards and downwards, as shown at 13. As a result, the supplied via the pipe 8 liquid (water) is guided on a spray plate 14 which is fixedly connected to the drum shaft 7. In this way, a sputtering effect with respect to the supplied liquid and the solid is achieved.
  • a special dispersing tool 15 is provided, which is formed in the shape of a rod or rods extending through the top of the housing to the lower portion of the rotating drum 2.
  • Three superimposed dispersing vanes 16 are provided on the rod, which can be folded in and out and are shown in their unfolded position in FIG.
  • the dispersing blades 16 function as cleaning blades, which engage in the chambers 3 and release the cake deposited there.
  • the device can be used as a batch or inline machine.
  • the suspension discharge is possible with and without pressure.
  • the collection of the solid (powder) can be done by means of generated negative pressure (rotating drum), whereby the dust load of the environment is reduced. With regard to the dispersing effect, infinite influence is possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (12)

  1. Dispositif de dispersion avec un logement (1), un tambour (2) rotatif, à axe vertical, disposé dans le logement (1), et un arbre d'entraînement (7) de tambour, un dispositif d'alimentation en matière solide (4, 5, 6 ; 17, 18, 19) s'étendant dans le tambour (2), un dispositif d'alimentation en liquide (8) s'étendant dans le tambour (2), un dispositif d'évacuation de suspension (10) et un outil de dispersion avec au moins un élément de dispersion s'étendant radialement, dans lequel l'élément de dispersion est formé par une ailette de dispersion (11, 16) s'étendant radialement vers l'extérieur et l'outil de dispersion est formé par au moins un des composants suivants :
    a. le dispositif d'alimentation en matière solide (4, 5, 6 ; 17, 18, 19),
    b. le dispositif d'alimentation en liquide (8),
    c. l'arbre d'entraînement (7) de tambour,
    d. un outil de dispersion spécial (15) s'étendant à l'intérieur du tambour (2),
    caractérisé en ce que le tambour (2) ouvert sur le dessus forme un trop-plein (12) pour la suspension produite et en ce que l'espace annulaire formé entre le tambour (2) et le logement (1) reçoit la suspension sortant du tambour (2) via le trop-plein (12) et conduit au dispositif d'évacuation de suspension (10).
  2. Dispositif de dispersion selon la revendication 1, caractérisé en ce que l'outil de dispersion peut être mis en rotation.
  3. Dispositif de dispersion selon la revendication 1 ou 2, caractérisé en ce que la paroi intérieure du tambour (2) est pourvue de chambres (3).
  4. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'alimentation en matière solide comprend un puits (6) ou un tuyau (17).
  5. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'alimentation en liquide (8) présente un tuyau.
  6. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce qu'il présente un système de circulation pour ramener la suspension évacuée par le dispositif d'évacuation de suspension (10) dans le tambour (2) via le dispositif d'alimentation en liquide (8).
  7. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que l'outil de dispersion (15) présente une pluralité d'ailettes de dispersion (11, 16) disposées les unes au-dessus des autres.
  8. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce qu'il est configuré en même temps comme dispositif de classification et présente un dispositif d'évacuation (9) pour la suspension classifiée.
  9. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que ladite au moins une ailette de dispersion (11, 16) est configurée comme un dispositif de nettoyage pour la matière solide se déposant sur la paroi du tambour.
  10. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que ladite au moins une ailette de dispersion (11, 16) peut être dépliée et repliée.
  11. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'alimentation en matière solide, le dispositif d'alimentation en liquide et / ou le dispositif d'évacuation pour la suspension classifiée sont configurés de manière à pouvoir être introduits dans le tambour et ressortis de celui-ci, notamment de manière orientable.
  12. Dispositif de dispersion selon l'une des revendications précédentes, caractérisé en ce que l'outil de dispersion peut être déplacé dans le tambour dans le sens axial et / ou radial.
EP00106283A 1999-03-27 2000-03-23 Dispositif de dispersion Expired - Lifetime EP1043061B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914086A DE19914086A1 (de) 1999-03-27 1999-03-27 Dispergiervorrichtung
DE19914086 1999-03-27

Publications (2)

Publication Number Publication Date
EP1043061A1 EP1043061A1 (fr) 2000-10-11
EP1043061B1 true EP1043061B1 (fr) 2006-12-13

Family

ID=7902735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106283A Expired - Lifetime EP1043061B1 (fr) 1999-03-27 2000-03-23 Dispositif de dispersion

Country Status (3)

Country Link
EP (1) EP1043061B1 (fr)
AT (1) ATE347929T1 (fr)
DE (2) DE19914086A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4188240B2 (ja) * 2001-10-06 2008-11-26 ギュントラム・クレテック 湿式分級装置
CN109954429A (zh) * 2019-03-21 2019-07-02 黑龙江兰德超声科技股份有限公司 一种润滑油颗粒耦合分散装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2091532A (en) * 1935-03-29 1937-08-31 Robert M Strong Mixing device
DE1207347B (de) * 1961-12-06 1965-12-23 Roger Joseph Sevin Maschine zum Dispergieren von Stoffteilchen
CH475025A (de) * 1966-05-25 1969-07-15 Buehner Willy Verfahren und Vorrichtung zum kontinuierlichen Dispergieren vorwiegend viskoser Substanzen
CH495163A (de) * 1969-04-14 1970-08-31 William Hooper Robert Vorrichtung zum Mischen und Auszentrifugieren
US3635443A (en) * 1970-11-19 1972-01-18 Patterson Kelley Co Dispersion head for solids-liquids blender
SU1456318A1 (ru) * 1986-12-25 1989-02-07 Предприятие П/Я Г-4632 Растворосмеситель
DE59300496D1 (de) * 1992-04-30 1995-09-28 Urs Liechti Einrichtung und Verfahren zum Beimischen einer schüttbaren Feststoffkomponente zu einer flüssigen Grundmasse.
US5743840A (en) * 1996-06-24 1998-04-28 Carr Separations, Inc. Centrifuge with a heating jacket for drying collected solids

Also Published As

Publication number Publication date
EP1043061A1 (fr) 2000-10-11
DE19914086A1 (de) 2000-09-28
DE50013844D1 (de) 2007-01-25
ATE347929T1 (de) 2007-01-15

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