EP0979139B1 - Device for disintegrating powdery materials - Google Patents

Device for disintegrating powdery materials Download PDF

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Publication number
EP0979139B1
EP0979139B1 EP98922770A EP98922770A EP0979139B1 EP 0979139 B1 EP0979139 B1 EP 0979139B1 EP 98922770 A EP98922770 A EP 98922770A EP 98922770 A EP98922770 A EP 98922770A EP 0979139 B1 EP0979139 B1 EP 0979139B1
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EP
European Patent Office
Prior art keywords
dispersing device
dissolving
outlet
wetting unit
liquid
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
EP98922770A
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German (de)
French (fr)
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EP0979139A1 (en
Inventor
Johannes Trauwitz
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.)
Ytron Process Technology & Co KG GmbH
Original Assignee
Ytron Process Technology & Co KG GmbH
YTRON PROCESS TECHNOLOGY GmbH
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Publication of EP0979139A1 publication Critical patent/EP0979139A1/en
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Publication of EP0979139B1 publication Critical patent/EP0979139B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices

Definitions

  • the invention relates to a device for continuous Unlocking a powdery substance that is difficult to wet in a liquid with a feed device for the powdery substance and with a downstream dispersing device.
  • Such devices with which difficult to unlock powdery substances, such as thickeners and stabilizers, brought into a colloidal solution or dispersion are generally known. Usually due to the nature of the system, the pass the dispersing device several times so that its Structure can be stressed and smashed.
  • the invention has for its object to provide a device for the continuous digestion of a difficult-to-wet powdery substance in a liquid, with which continuous processing without sticking to powder-contacting areas is possible with simultaneous reliable wetting and digestion of each individual powder particle.
  • the invention has the advantage that a Gluing of the powdery substance in powder contact areas, especially in the outlet area of the feeding device, in the suction area, contact area of powder and liquid or is prevented in the dispersion chamber where otherwise by the first contact with the liquid There is a risk of clumping and sticking. To this Way can be continuous for an unlimited period of time, if necessary, it can also be worked in batches. This extends the service life and makes it regular Cleaning at short intervals is unnecessary.
  • a preferred development of the invention consists in that the injector with an adjustable nozzle for different Concentration settings is provided.
  • The also has the advantage that at the beginning of a liquid supply the nozzle can be closed first so that Setbacks of the liquid in the discharge device outlet prevents and the risk of powder sticking be avoided.
  • a preferred development of the invention consists in that the dispersing device is followed by a pump is. Removal can be particularly difficult with highly viscous products guaranteed particularly reliably in this way become. It also creates a setback for the Liquid into the injector with a caused Blocking effect due to swelling powder excluded. The additional suction of the pump also creates an increase of concentration. In the event that in the dispersing device there is a rotor with a pump effect, this can possibly be omitted.
  • the dispersing device with at least an inlet for the supply of dilution liquid and / or Steam is provided. This can be a continuous Dilute or adjust to the desired product concentration be made. Through the steam supply it is possible to heat the solution in the disperser.
  • the invention is based on one in the drawing illustrated embodiment described further.
  • the single figure schematically shows a cross section through the device according to the invention.
  • a funnel-shaped feed device 10 About a funnel-shaped feed device 10 is a Powdery substance that is difficult to wet, for example a thickener like xanthan, into a pre-wetting unit 11 sucked and from there into a dispersing device 12.
  • a powdery substance that is difficult to wet for example a thickener like xanthan
  • the outlet 16 for example also arranged next to or above the inlet 17 his.
  • the connection is made via a hose connection 18 made between the two.
  • Task unit 10 can also have an automatic suction device be provided.
  • the pre-wetting unit 11 also includes an injector 13 an adjustable nozzle 15. In the chamber of the injector becomes a liquid via a radial feed opening 20 introduced under pressure.
  • the outlet 14 of the pre-wetting unit opens tangentially into the cylindrical dispersion device 12.
  • You consists of a mixing chamber in the example shown 23 with a rotor 22 consisting of one or more Sprockets 24 and inner pump vane 27 and one Stator 28.
  • the stator 28 consists of one or more Sprockets.
  • the sprockets of the rotor and the stator are arranged concentrically one inside the other.
  • the product comes in a Forced passage through the shaving system.
  • the toothed rotor / stator system can also be an impact surface system (Stator and / or rotor baffles) or a another dispersion system can be used (not shown).
  • the dispersed is via an outlet port 25 Solution executed in the tangential direction from the mixing chamber 23.
  • a dilution liquid can additionally be added to a further inlet 26 and / or steam to heat the solution be fed.
  • the axis of rotation is 21 of the impeller 22 horizontally and the longitudinal axis of the prewetting unit 11 arranged vertically.

Description

Die Erfindung betrifft eine Vorrichtung zum kontinuierlichen Aufschließen eines schwer benetzbaren pulvrigen Stoffes in einer Flüssigkeit mit einer Aufgabeeinrichtung für den pulvrigen Stoff und mit einer nachgeschalteten Dispergiervorrichtung.The invention relates to a device for continuous Unlocking a powdery substance that is difficult to wet in a liquid with a feed device for the powdery substance and with a downstream dispersing device.

Derartige Vorrichtungen, mit welchen schwer aufschließbare pulvrige Stoffe, wie beispielsweise Dickungsmittel und Stabilisatoren, in eine kolloidale Lösung bzw. Dispersion gebracht werden können, sind grundsätzlich bekannt. Üblicherweise müssen die Trockenstoffe systembedingt chargenweise mehrmals die Dispergiervorrichtung passieren, so daß ihre Struktur stark beansprucht und zerschlagen werden kann.Such devices with which difficult to unlock powdery substances, such as thickeners and stabilizers, brought into a colloidal solution or dispersion are generally known. Usually due to the nature of the system, the pass the dispersing device several times so that its Structure can be stressed and smashed.

Außerdem sind auch kontinuierlich arbeitende Vorrichtungen bekannt, die in einem Durchlauf die pulverigen Stoffe benetzen bzw. aufschließen, jedoch pulverberührte Teile verkleben und somit den Produktionsprozeß unterbrechen.They are also continuously working devices known that the powdery substances in one pass moisten or unlock, however, parts in contact with powder stick together and thus interrupt the production process.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum kontinuierlichen Aufschließen eines schwer benetzbaren pulvrigen Stoffes in einer Flüssigkeit anzugeben, mit welcher auf einfache Weise ein kontinuierliches Verarbeiten ohne Verklebungen an pulverberührenden Bereichen bei gleichzeitiger zuverlässiger Benetzung und Aufschluß jedes einzelnen Pulverpartikelchens möglich ist. The invention has for its object to provide a device for the continuous digestion of a difficult-to-wet powdery substance in a liquid, with which continuous processing without sticking to powder-contacting areas is possible with simultaneous reliable wetting and digestion of each individual powder particle.

Diese Aufgabe wird gemäß dem kennzeichnenden Teil des Anspruchs 1 gelöst. Die Erfindung hat den Vorteil, daß ein Verkleben des pulvrigen Stoffes in pulverberührenden Bereichen, insbesondere im Auslaßbereich der Aufgabeeinrichtung, im Einsaugbereich, Kontaktbereich von Pulver und Flüssigkeit oder in der Dispergierkammer verhindert wird, wo ansonsten durch den ersten Kontakt mit der Flüssigkeit die Gefahr von Verklumpen und Verkleben besteht. Auf diese Weise kann über unbegrenzten Zeitraum problemlos kontinuierlich, bei Bedarf aber auch chargenweise, gearbeitet werden. Dadurch wird die Standzeit verlängert und eine regelmäßige Reinigung in kurzen Abständen überflüssig.This object is achieved according to the characterizing part of the claim 1 solved. The invention has the advantage that a Gluing of the powdery substance in powder contact areas, especially in the outlet area of the feeding device, in the suction area, contact area of powder and liquid or is prevented in the dispersion chamber where otherwise by the first contact with the liquid There is a risk of clumping and sticking. To this Way can be continuous for an unlimited period of time, if necessary, it can also be worked in batches. This extends the service life and makes it regular Cleaning at short intervals is unnecessary.

Es ist zweckmäßig, daß der Auslaß der Vorbenetzungseinheit tangential in die Dispergiereinrichtung geführt ist, weil durch den so entstehenden "Drall" (Radialströmung) des einströmenden Gemisches ein Gegendruck vermieden und der Abtransport des Produktes gefördert wird.It is convenient that the outlet of the pre-wetting unit is guided tangentially into the dispersing device because through the resulting "swirl" (radial flow) of the inflowing Mixtures avoided a back pressure and the removal of the product is promoted.

Eine bevorzugte Weiterbildung der Erfindung besteht darin, daß der Injektor mit einer verstellbaren Düse für unterschiedliche Konzentrationseinstellungen versehen ist. Das hat ferner den Vorteil, daß zu Beginn einer Flüssigkeitszufuhr die Düse zunächst geschlossen werden kann, so daß Rückschläge der Flüssigkeit in den Auslaß der Aufgabeeinrichtung verhindert und die Gefahr von Pulververklebungen vermieden werden.A preferred development of the invention consists in that the injector with an adjustable nozzle for different Concentration settings is provided. The also has the advantage that at the beginning of a liquid supply the nozzle can be closed first so that Setbacks of the liquid in the discharge device outlet prevents and the risk of powder sticking be avoided.

Grundsätzlich ist es bei bestimmten Pulvern zur Erzielung einer maximalen Konzentration zweckmäßig, die Aufgabeeinrichtung unmittelbar über dem Injektor anzuordnen. Andererseits kann es in vielen Anwendungsfällen vorteilhaft sein, daß der Auslaß der Aufgabeeinrichtung unterhalb des Einlaßes der Vorbenetzungseinheit angeordnet ist und dazwischen eine Schlauchverbindung vorhanden ist. Basically, it can be achieved with certain powders a maximum concentration appropriate, the task facility to be placed directly above the injector. on the other hand it can be advantageous in many applications, that the outlet of the feeder is below the inlet the pre-wetting unit is arranged and in between there is a hose connection.

Sehr gute Ergebnisse werden dadurch erzielt, daß die Rotationsachse der Dispergiereinrichtung horizontal ausgerichtet ist und die Längsachse der Vorbenetzungseinheit vertikal verläuft, wobei der Auslaß der Vorbenetzungseinheit vertikal in die Dispergiereinrichtung mündet. Grundsätzlich arbeitet die Vorrichtung aber auch zufriedenstellend, wenn die Rotationsachse der Dispergiervorrichtung vertikal und die Längsachse der Vorbenetzungseinheit horizontal oder vertikal ausgerichtet ist.Very good results are achieved in that the axis of rotation the disperser aligned horizontally and the longitudinal axis of the prewetting unit is vertical runs, with the outlet of the pre-wetting unit vertical opens into the dispersing device. Basically works the device but also satisfactory if the axis of rotation of the disperser vertically and the longitudinal axis of the prewetting unit is horizontal or is aligned vertically.

Eine bevorzugte Weiterbildung der Erfindung besteht darin, daß der Dispergiereinrichtung eine Pumpe nachgeschaltet ist. Besonders bei hochviskosen Produkten kann der Abtransport auf diese Weise besonders zuverlässig gewährleistet werden. Außerdem wird auf diese Weise ein Rückschlag der Flüssigkeit in den Injektor mit einer dadurch verursachten Blockagewirkung durch quellendes Pulver ausgeschlossen. Die zusätzliche Saugwirkung der Pumpe erzeugt ferner eine Erhöhung der Konzentration. Für den Fall, daß in der Dispergiereinrichtung ein Rotor mit Pumpwirkung vorhanden ist, kann dieser unter Umständen entfallen.A preferred development of the invention consists in that the dispersing device is followed by a pump is. Removal can be particularly difficult with highly viscous products guaranteed particularly reliably in this way become. It also creates a setback for the Liquid into the injector with a caused Blocking effect due to swelling powder excluded. The additional suction of the pump also creates an increase of concentration. In the event that in the dispersing device there is a rotor with a pump effect, this can possibly be omitted.

Eine andere vorteilhafte Weiterbildung der Erfindung besteht darin, daß die Dispergiereinrichtung mit mindestens einem Einlaß zur Zuführung von Verdünnungsflüssigkeit und/oder Dampf versehen ist. Damit kann ein kontinuierliches Verdünnen oder Einstellen auf die gewünschte Produktkonzentration vorgenommen werden. Durch die Dampfzuführung ist es möglich, die Lösung in der Dispergiereinrichtung zu erhitzen.Another advantageous development of the invention exists in that the dispersing device with at least an inlet for the supply of dilution liquid and / or Steam is provided. This can be a continuous Dilute or adjust to the desired product concentration be made. Through the steam supply it is possible to heat the solution in the disperser.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles weiter beschrieben. The invention is based on one in the drawing illustrated embodiment described further.

Die einzige Figur zeigt schematisch einen Querschnitt durch die erfindungsgemäße Vorrichtung.The single figure schematically shows a cross section through the device according to the invention.

Über eine trichterförmige Aufgabeeinrichtung 10 wird ein schwer benetzbarer pulvriger Stoff, beispielsweise ein Verdickungsmittel wie Xanthan, in eine Vorbenetzungseinheit 11 gesaugt und gelangt von dort in eine Dispergiereinrichtung 12. In dem dargestellten Beispiel befindet sich ein Auslaß 16 der Aufgabeeinheit 10 unterhalb und neben einem Einlaß 17 der Vorbenetzungseinheit 11. Alternativ kann der Auslaß 16 beispielsweise auch neben oder über dem Einlaß 17 angeordnet sein. Über eine Schlauchverbindung 18 wird die Verbindung zwischen beiden hergestellt. Anstelle der dargestellten Aufgabeeinheit 10 kann auch eine selbsttätige Absaugeinrichtung vorgesehen sein.About a funnel-shaped feed device 10 is a Powdery substance that is difficult to wet, for example a thickener like xanthan, into a pre-wetting unit 11 sucked and from there into a dispersing device 12. In the example shown there is an outlet 16 of the feed unit 10 below and next to an inlet 17 of the pre-wetting unit 11. Alternatively, the outlet 16 for example also arranged next to or above the inlet 17 his. The connection is made via a hose connection 18 made between the two. Instead of the shown Task unit 10 can also have an automatic suction device be provided.

Die Vorbenetzungseinheit 11 umfaßt einen Injektor 13 mit einer verstellbaren Düse 15. In die Kammer des Injektors wird über eine radiale Zuführöffnung 20 eine Flüssigkeit unter Druck eingeführt. Die aus dem Injektor 13 über die Düse 15 ausströmende Flüssigkeit reißt aufgrund des erzeugten Saugdruckes den pulvrigen Stoff mit sich, wobei eine intensive Benetzung der Pulverteilchen erfolgt.The pre-wetting unit 11 also includes an injector 13 an adjustable nozzle 15. In the chamber of the injector becomes a liquid via a radial feed opening 20 introduced under pressure. The injector 13 via the Nozzle 15 flowing liquid tears due to the generated Suction pressure the powdery substance with it, whereby an intensive wetting of the powder particles takes place.

Der Auslaß 14 der Vorbenetzungseinheit mündet tangential in die zylindrisch ausgebildete Dispergiereinrichtung 12. Sie besteht in dem dargestellten Beispiel aus einer Mischkammer 23 mit einem Rotor 22, bestehend aus einem oder mehreren Zahnkränzen 24 und innenliegendem Pumpflügel 27 sowie einem Stator 28. Der Stator 28 besteht aus einem oder mehreren Zahnkränzen. Die Zahnkränze des Rotors und des Stators sind konzentrisch ineinander angeordnet. Das Produkt wird in einer Zwangspassage durch das Schersystem geführt. Anstelle des verzahnten Rotor/Stator-Systems kann auch ein Prallflächensystem (Stator und/oder Rotor-Prallflächen) oder ein anderes Dispergiersystem eingesetzt werden (nicht dargestellt). Über einen Auslaßstutzen 25 wird die dispergierte Lösung in tangentialer Richtung aus der Mischkammer 23 ausgeführt.The outlet 14 of the pre-wetting unit opens tangentially into the cylindrical dispersion device 12. You consists of a mixing chamber in the example shown 23 with a rotor 22 consisting of one or more Sprockets 24 and inner pump vane 27 and one Stator 28. The stator 28 consists of one or more Sprockets. The sprockets of the rotor and the stator are arranged concentrically one inside the other. The product comes in a Forced passage through the shaving system. Instead of The toothed rotor / stator system can also be an impact surface system (Stator and / or rotor baffles) or a another dispersion system can be used (not shown). The dispersed is via an outlet port 25 Solution executed in the tangential direction from the mixing chamber 23.

An einen weiteren Einlaß 26 kann zusätzlich eine Verdünnungsflüssigkeit und/oder Dampf zur Erwärmung der Lösung zugeführt werden.A dilution liquid can additionally be added to a further inlet 26 and / or steam to heat the solution be fed.

In dem dargestellten Beispiel sind die Rotationsachse 21 des Pumpenrades 22 horizontal und die Längsachse der Vorbenetzungseinheit 11 vertikal angeordnet.In the example shown, the axis of rotation is 21 of the impeller 22 horizontally and the longitudinal axis of the prewetting unit 11 arranged vertically.

Claims (6)

  1. A device for continuously solubilizing a pulverulent substance which is difficult to wet in a liquid, having a feed device (10) for the pulverulent substance and having a dispersing device (12) which is connected downstream of the feed device and has a pump wheel (22), an injector (13), to which pressurized liquid can be applied, being connected between the feed device (10) and the dispersing device (12), as a preliminary wetting unit (11),
    characterized in that
    the longitudinal axis of the preliminary wetting unit (11) is arranged vertically and the axis of rotation of the pump wheel (22) is arranged horizontally, the outlet (14) of the preliminary wetting unit (11) opening vertically into the dispersing device (12).
  2. The dissolving/ dispersing device as claimed in claim 1,
    characterized in that
    the outlet (14) of the preliminary wetting unit (11) is guided tangentially into the dispersing device (12).
  3. The dissolving / dispersing device as claimed in claim 1 or 2,
    characterized in that
    the injector (13) is provided with an adjustable nozzle (15) for adjusting the concentration as desired.
  4. The dissolving / dispersing device as claimed in one of the preceding claims,
    characterized in that
    the outlet (16) of the feed device (10) is arranged below the inlet (17) of the preliminary wetting unit (11), and there is a hose connection (18) between them.
  5. The dissolving / dispersing device as claimed in one of the preceding claims,
    characerized in that
    a pump is connected downstream of the dispersing device (12).
  6. The dissolving / dispersing device as claimed in one of the preceding claims,
    characterized in that
    the dispersing device (12) is provided with a least one inlet (26) for supplying diluting liquid and / or steam.
EP98922770A 1997-04-23 1998-04-23 Device for disintegrating powdery materials Expired - Lifetime EP0979139B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19717161A DE19717161A1 (en) 1997-04-23 1997-04-23 Device for disintegrating a powdery substance
DE19717161 1997-04-23
PCT/EP1998/002424 WO1998047609A1 (en) 1997-04-23 1998-04-23 Device for disintegrating powdery materials

Publications (2)

Publication Number Publication Date
EP0979139A1 EP0979139A1 (en) 2000-02-16
EP0979139B1 true EP0979139B1 (en) 2002-07-17

Family

ID=7827506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98922770A Expired - Lifetime EP0979139B1 (en) 1997-04-23 1998-04-23 Device for disintegrating powdery materials

Country Status (5)

Country Link
EP (1) EP0979139B1 (en)
AU (1) AU7528698A (en)
CA (1) CA2293689A1 (en)
DE (2) DE19717161A1 (en)
WO (1) WO1998047609A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50007630D1 (en) * 2000-10-11 2004-10-07 Vakumix Ruehr Und Homogenisier Device for homogenizing flowable substances
DE502006008434D1 (en) * 2006-03-29 2011-01-13 Vakumix Ruehr Und Homogenisiertechnik Ag Device for homogenizing, mixing or dispersing flowable media

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280313A (en) * 1926-09-01 1927-11-17 Foamite Childs Corp Improvements in or relating to apparatus for mixing powder with liquid
US3169751A (en) * 1961-07-10 1965-02-16 Morton Machine Company Ltd Mixing or emulsifying machines
CH549405A (en) * 1972-03-22 1974-05-31 Nestle Sa METHOD AND APPARATUS FOR THE CONTINUOUS DISSOLUTION OF A PULVERULENT MATERIAL IN A LIQUID.
IT1024318B (en) * 1973-11-14 1978-06-20 Dillumelt Srl PROCESS FOR MESOOLAR IN A TINUOUS WAY A POWDER IN A LIQUID AND DEVICE FOR STARTING THE PROCESS
DE2657791A1 (en) * 1976-12-21 1978-06-22 Babcock Kina Ltd Liq. jet mixing nozzle - has coaxial inlet and outlet tubes mounted in sleeve and pipe adjustably screwing together
DE2705501A1 (en) * 1977-02-10 1978-08-17 Upraton F J Zucker Kg Mixer separator with pumped recycle - having conical blend vessel with spiral motion caused by recycle
US4421412A (en) * 1978-12-20 1983-12-20 Usm Corporation Process and apparatus for processing plastic and polymeric materials
JPS62106829A (en) * 1985-10-29 1987-05-18 Funken:Kk Continuous premixer

Also Published As

Publication number Publication date
DE59804810D1 (en) 2002-08-22
DE19717161A1 (en) 1998-10-29
WO1998047609A1 (en) 1998-10-29
AU7528698A (en) 1998-11-13
CA2293689A1 (en) 1998-10-29
EP0979139A1 (en) 2000-02-16

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