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EP0760254B1 - Dispositif pour l'homogénéisation de matériaux coulants - Google Patents

Dispositif pour l'homogénéisation de matériaux coulants Download PDF

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Publication number
EP0760254B1
EP0760254B1 EP96113419A EP96113419A EP0760254B1 EP 0760254 B1 EP0760254 B1 EP 0760254B1 EP 96113419 A EP96113419 A EP 96113419A EP 96113419 A EP96113419 A EP 96113419A EP 0760254 B1 EP0760254 B1 EP 0760254B1
Authority
EP
European Patent Office
Prior art keywords
container
outlet
homogenizer
connection
homogeniser
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
EP96113419A
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German (de)
English (en)
Other versions
EP0760254A1 (fr
Inventor
Erwin Seefried
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.)
Vakumix Ruehr- und Homogenisiertechnik AG
Original Assignee
Vakumix Ruehr- und Homogenisiertechnik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19537303A external-priority patent/DE19537303B4/de
Application filed by Vakumix Ruehr- und Homogenisiertechnik AG filed Critical Vakumix Ruehr- und Homogenisiertechnik AG
Publication of EP0760254A1 publication Critical patent/EP0760254A1/fr
Application granted granted Critical
Publication of EP0760254B1 publication Critical patent/EP0760254B1/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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/52—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle with a rotary stirrer in the recirculation tube
    • 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
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/811—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
    • 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
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/811—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
    • B01F27/8111—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump the stirrers co-operating with stationary guiding elements, e.g. surrounding stators or intermeshing stators

Definitions

  • Homogenization mixers are used in the pharmaceutical, cosmetic, chemical and food industry for the production of creams, ointments, Pastes, mayonnaises and similar products used. They have a mixing container on, usually at the bottom of the container a homogenizer for homogenizing and circulating the substances is arranged in the mixing container.
  • the homogenizer is often designed as a rotor-stator dispersing machine, but can also be a circulation agitator to achieve a better pumping effect.
  • EP-A 0 036 067 discloses a homogenizer in which the switchover between the two operating modes by means of an axially displaceable relative to the homogenizer Control ring takes place.
  • the ring has two opposing sealing surfaces and closes the in the circulation line in its two axial end positions opening channel or the channel leading directly back to the boiler bottom. The each other channel is released.
  • the Control ring is made by means of a single Hydraulic cylinder not described moved. This hydraulic cylinder must be placed in the area of the mechanically highly stressed homogenizer become.
  • the arrangement of this hydraulic cylinder in the homogenizer and the necessary power transmission means Transferring the movement to the control ring means complication of the homogenizer structure and a weakening of its mechanical Resilience.
  • a generic homogenizing device is known from DE 28 05 942 C2. At this device is the discharge of the homogenizer via a throttle opening Annular gap connected to the bottom of the mixing container. With low viscosity Mixed material is fed back into the boiler through this throttle gap, it finds a place Homogenize in the boiler instead. If the mix has a higher viscosity during the mixing process friction in the throttle gap gradually leads to a blockage this gap, as a result of the then increasing pressure in the outlet, opens a sensor the bypass line, there is now homogenization in circulation.
  • This known device has various disadvantages.
  • the one in the throttle gap Friction occurs increases the energy required for homogenization.
  • a Defined process control is not possible, rather the operating states are established Homogenization in the boiler or homogenization in circulation independently depending on on the viscosity of the mix, transition states are also possible in which both types of homogenization take place simultaneously.
  • the invention has for its object a device of the type mentioned to create, which does not have the disadvantages mentioned or to a lesser extent.
  • the invention solves this problem in a device according to the preamble of the claim 1 in that the second connection has a closing device which when a predetermined pressure in the process is exceeded, this connection is released and it closes again when the pressure falls below a predetermined pressure.
  • the mix is conveyed into the drain.
  • the lockable first connection is closed, the pressure in the drain increases long until a predetermined pressure is exceeded and the closing device second connection, which leads back to the container in a short way. It takes place then the so-called homogenization takes place in the boiler.
  • the second connection is in the Usually end in the bottom of the container, but it can also be in other areas of the container that are located near the homogenizer inlet.
  • the mix can pass through this first Connection returned to the area of the container spaced from the homogenizer become.
  • the pressure in the outlet consequently drops below a predetermined pressure, so that the closing device closes the second connection again. It is now taking place the so-called homogenization in circulation instead.
  • the cross section of the second connection is expedient within the scope of the invention chosen so that the product with a relatively high product viscosity relatively small friction losses flow through this second connection can.
  • the friction losses occurring in the throttle gap in the prior art are avoided. Loss of pressure when passing through the second connection only to a small extent.
  • the closing device can be, for example, a valve that is in the process of a arranged pressure sensor is controlled. In the context of the invention, however, it is preferred that the closing device is acted upon by an external force in the closed position is biased. This external force is preferably a spring force. At a Pressure increase in the drain then the closing device against the spring force in it Open position pressed.
  • the second connection connect the drain of the homogenizer to the tank bottom. It is advantageously avoided that the second connection in the container in the area of the inlet of the homogenizer opens and thereby the inflow into the homogenizer disturbs.
  • the second connection can be, for example, one or more of them Homogenizer housing and / or bore passing through the stator of the homogenizer or bores formed, which are preferably axially (parallel to the axis of rotation of the homogenizer) and the associated closing devices exhibit.
  • this Annular channel between the housing of the homogenizer and the stator or the stator cover be trained.
  • the width of the ring channel is preferably dimensioned so that a low-friction and low-pressure passage even of relatively highly viscous Mixed material is possible.
  • the ring channel opens in the preferred embodiment mentioned between the homogenizer housing and the stator cover in the area of the outer circumference of the homogenizer in the tank bottom, the return of the mixed material in the Containers in this area do not disturb the inflow into the homogenizer.
  • the closing device is preferably as in the Area of the mouth of the ring channel formed in the drain arranged sealing ring, the spring loaded is biased into a closed position in which it is the ring channel sealed against the flow, and that when a predetermined value is exceeded Pressure in the drain against the spring force is movable into an open position in which it opens the ring channel towards the drain.
  • this embodiment of the invention is after closing the shutoff of the first connection and the subsequent pressure increase in the course of the homogenizer, a uniform discharge of mix into the Boiler possible over the entire circumference of the ring channel, so that the container contents is mixed evenly.
  • the first connection is usually designed as a circulation line, which is in the upper area of the container opens into this.
  • This circulation line it is possible, in particular Shift higher-viscosity products in the boiler to ensure that Even with these higher-viscosity products, uniform homogenization takes place.
  • a homogenizer is to be understood as any device a mixing and / or homogenizing effect using kinetic energy achieved.
  • the homogenizer can be designed as a rotor-stator dispersion machine, which the kinetic energy of the rotor primarily through a strong swirl in Implemented dispersing effect and thus achieved an intensive homogenization. Based on these These rotor-stator dispersing machines only produce turbulence in proportion low pumping action, so that high drive energies may be required.
  • a rotor-stator dispersing machine instead to use a so-called circulation agitator as a homogenizer, that the kinetic energy of the rotor primarily in a pumping action and thus in Kinetic energy of the goods to be homogenized and only a low dispersing effect through swirling.
  • Intermediate stages are also possible, for example conceivable to attach additional blades to the rotor of a rotor-stator dispersing machine, in order to improve the pumping action, as taken from DE-A-34 17 242 is known.
  • a homogenizer known from EP-B-0 290 033 is conceivable.
  • a circulation agitator makes it possible to put smaller amounts of powder in the recycle stream suck in and thus feed the material to be homogenized.
  • the device according to the invention basically has a mixing container 1 and one homogenizer 2 driven by a drive 3.
  • the at 4 in the inflow of Products entering the homogenizer can flow out of the homogenizer either through the ring channel to be described in more detail below back into the boiler are performed (homogenization in the boiler, indicated by the arrows at 5), or but led through the external circulation line 6 into the upper region of the mixing container 1 be so that the homogenization indicated by the arrows at 7 in circulation takes place.
  • Shut-off valves 8, 9 are used to open or close the circulation line 6. After the homogenization has been completed, the product from the mixing container 1 to be discharged into a drain via the shut-off valve 10.
  • the structure of the homogenizer 2 can be seen more clearly in FIGS. 2 and 3.
  • the drive 3 drives the shaft 11 with a shaft 12 provided with a hub 12 rotatably connected rotor 13, the two downward concentric to each other Rows of rotor teeth 14 and 15 has.
  • the stator 17 With the homogenizer housing 16, the stator 17 is connected, the two mutually concentric rows of stator teeth 18, 19.
  • a stator cover 20 connected to the stator 17 covers the rotor 13 on its outer circumference and at the same time forms the one labeled 21 Feed of the homogenizer.
  • On the outer circumference of the homogenizer housing 16 is a concentric to the homogenizer shaft 22 is arranged, the drain of the homogenizer. As can be seen in FIG.
  • the channel 22 widens axial direction in the direction of rotation of the rotor 13 up to the connection of the outlet 22 with the circulation line 6.
  • the axial width of the outlet 22 narrows over a short circumferential section Use causes a large part of what is conveyed in the circumferential direction through the outlet 22 Mixed material exits into the circulation line 6 when the shut-off valve 8 and one the valves 9 or 10 are open.
  • the said transition from the peripheral portion large axial width to the peripheral portion small axial width of the drain 22 is in Fig. 2 indicated at 23.
  • this homogenizer corresponds to a conventional rotor-stator dispersion machine the state of the art.
  • an annular channel 24 is provided which Drain 22 connects to the product space of the mixing container 1.
  • One of one indicated at 25 Spring device prestressed sealing ring 26 statically seals the ring channel 24 compared to the drain 22. It lies sealingly on a beveled surface 27 of the homogenizer housing 16.
  • the material contained in the container 1 is fed via the inlet 21 fed to the homogenizer 2.
  • the homogenizer rotor is the product in a known manner with high forces (especially dispersing and Shear forces) and by the stator teeth 18,19 in the concentric to the rotor shaft 11 arranged annular drain channel 22 is pressed.
  • the valve 8 of the circulation line 6 is closed, the pressure in the outlet 22 rises until the Sealing ring 26 is raised against the force of the spring device 25 from its seat 27 is, so that the product from the outlet 22 through the ring channel 24 back into dei Container 1 can flow.
  • the so-called mixing takes place in the Boiler instead (reference number 5 in Fig. 1).
  • valve 9 is closed and the valves 8 and 10 open, the content of the mixing container 1 is then from the homogenizer 2 promoted in the process.
  • FIGS. 4 to 7 A second embodiment of the invention is shown in FIGS. 4 to 7.
  • This embodiment largely corresponds to the first embodiment, therefore they are the same Parts with the same reference numerals. To that extent, the description of the first Embodiment referred.
  • the differences from the first embodiment lie in the training of the homogenizer as a circulation agitator and in training and management the circulation line 6. These differences are described in more detail below.
  • the rotor 13 has conveyor blades 34 which in primarily designed to promote the goods to be homogenized in the drain 22 are and, unlike the first embodiment, only a relatively small one Apply shearing and dispersing action to this material. Accordingly, the rotational energy of the rotor 13 primarily in kinetic energy of the material to be homogenized Guts (pumping effect) implemented.
  • the stator has guide surfaces or blades 35, to achieve a substantially laminar flow of the delivery vanes 34 funded assets are determined. These guide vanes 35 thus serve, unlike in a rotor-stator dispersing machine, not as baffles to achieve a dispersing effect.
  • the homogenizer 2 of this embodiment thus achieves a much higher one Pumping power as the rotor-stator dispersing machine of the first embodiment.
  • Customized the circulation line 6 is also designed differently to this higher pumping capacity (see Figs. 4 and 5). Because of the achievable high circulation speed in the circulation line 6, powder can be sucked into the circulating stream via a valve 29 and so be mixed with the good. Additional liquid can be supplied via a valve 28 become.
  • the valve 30 is open and the valves 31 and 32 closed. By closing the valve 30 and opening the valve 32, the homogenized can Well, for example, can be fed to another mixing container. This is often required when the aqueous phase and the fat phase must first be mixed separately.
  • the high pumping action of the homogenizer 2 also enables CIP cleaning (cleaning in place) of the entire system without the aid of additional pumps.
  • cleaning liquid is introduced into the system and by means of the homogenizer 2 pumped through the circulation line 6.
  • the valve 31 By opening the valve 31, the Cleaning liquid sprayed by means of a spray head 33 in the upper region of the container 1 and so moisten the entire inner surface of the container 1 evenly.
  • the entire pipeline path can also be flushed in circulation.

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

Claims (8)

  1. Dispositif d'homogénéisation de matières coulantes qui comporte :
    un récipient (1),
    au moins un homogénéisateur (2) associé à ce récipient (1) avec une arrivée (21) pour l'arrivée des substances à l'homogénéisateur (2),
    une sortie (22) de l'homogénéisateur (2),
    une première liaison (6) qui peut être fermée entre la sortie (22) et le récipient (1), au moyen de laquelle les substances provenant de la sortie (22) peuvent être recyclées dans une zone du récipient (1), éloignée de l'homogénéisateur (2),
    une deuxième liaison (24) entre la sortie (22) et le récipient (1), au moyen de laquelle les substances provenant de la sortie (22) peuvent être recyclées dans une zone du récipient (1) qui présente une distance moindre par rapport à l'homogénéisateur (2) que la zone dans laquelle la première liaison (6) débouche dans le récipient,
    caractérisé en ce que la deuxième liaison (24) comporte un dispositif de fermeture (25, 26) qui, lorsqu'une pression prédéterminée est dépassée dans la sortie (22), ouvre cette liaison (22) et la referme lorsqu'une pression prédéterminée n'est pas atteinte.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de fermeture (25, 26) est précontraint dans la position de fermeture, sous l'action d'une force externe.
  3. Dispositif selon la revendication 2, caractérisé en ce que cette force externe est la force d'un ressort.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la deuxième liaison est réalisée en tant que canal annulaire (24) qui relie la sortie (22) à l'intérieur du récipient (1).
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de fermeture est réalisé en tant que bague d'étanchéité (26) disposée dans la zone d'embouchure du canal annulaire(24) dans la sortie (22), laquelle bague d'étanchéité est précontrainte par un ressort dans une position de fermeture, dans laquelle elle ferme le canal annulaire (24) par rapport à la sortie (22), et est déplaçable dans une position d'ouverture, à l'encontre de la force d'un ressort, lorsqu'une pression prédéterminée est dépassée dans la sortie (22), ce qui fait que le canal annulaire (24) s'ouvre vers la sortie (22).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que la première liaison est réalisée en tant que conduite de circulation (6) qui débouche dans le récipient (1), dans sa zone supérieure.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que l'homogénéisateur (2) est réalisé en tant que machine de dispersion à rotor et stator.
  8. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que l'homogénéisateur (2) est réalisé en tant qu'agitateur de brassage.
EP96113419A 1995-08-29 1996-08-21 Dispositif pour l'homogénéisation de matériaux coulants Expired - Lifetime EP0760254B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19531775 1995-08-29
DE19531775 1995-08-29
DE19537303A DE19537303B4 (de) 1995-08-29 1995-10-06 Vorrichtung zum Homogenisieren fließfähiger Stoffe
DE19537303 1995-10-06

Publications (2)

Publication Number Publication Date
EP0760254A1 EP0760254A1 (fr) 1997-03-05
EP0760254B1 true EP0760254B1 (fr) 2001-03-14

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Application Number Title Priority Date Filing Date
EP96113419A Expired - Lifetime EP0760254B1 (fr) 1995-08-29 1996-08-21 Dispositif pour l'homogénéisation de matériaux coulants

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EP (1) EP0760254B1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0896833B1 (fr) * 1997-08-11 2003-03-26 A. BERENTS GMBH & CO. KG Dispositif d'homogénéisation des matiériaux aptes a couler
DE19829646A1 (de) * 1998-07-02 2000-01-05 Wella Ag Verfahren zur Herstellung von wäßrigen Lösungen von Alkylethersulfaten
EP0988887B1 (fr) * 1998-08-25 2003-02-05 Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft Homogénisateur avec un dispositif de protection sur le rotor
CN1231288C (zh) 2000-01-31 2005-12-14 利乐拉瓦尔集团及财务有限公司 混合方法和装置
EP1121974B1 (fr) * 2000-01-31 2013-06-12 Tetra Laval Holdings & Finance S.A. Dispositif de mélange et l'utilisation
EP1477239A1 (fr) * 2003-05-14 2004-11-17 Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft Dispositif de mélange et/ou d'homogénéisation
PL2242566T3 (pl) 2008-01-16 2021-05-17 Tetra Laval Holdings & Finance S.A. Mieszalnik hybrydowy
EP3251716B1 (fr) 2009-08-11 2019-02-20 ResMed Motor Technologies Inc Ventilateur avec un appareil de soufflage à symétrie axiale et à un seul étage
JP7373311B2 (ja) * 2019-06-26 2023-11-02 株式会社イズミフードマシナリ 食用粉体溶解システム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7804138U1 (de) * 1978-02-13 1987-06-04 Berents, Alwin, 2800 Bremen Homogenisiermischer für die Herstellung fließfähiger Produkte
DE3009777C2 (de) * 1980-03-14 1985-09-12 Haagen & Rinau, 2800 Bremen Vorrichtung zum Mischen und Homogenisieren wenigstens zweier Medien

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Publication number Publication date
EP0760254A1 (fr) 1997-03-05

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