EP0896833A1 - Dispositif d'homogénéisation des matiériaux aptes a couler - Google Patents

Dispositif d'homogénéisation des matiériaux aptes a couler Download PDF

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Publication number
EP0896833A1
EP0896833A1 EP97113845A EP97113845A EP0896833A1 EP 0896833 A1 EP0896833 A1 EP 0896833A1 EP 97113845 A EP97113845 A EP 97113845A EP 97113845 A EP97113845 A EP 97113845A EP 0896833 A1 EP0896833 A1 EP 0896833A1
Authority
EP
European Patent Office
Prior art keywords
gap
homogenizer
mixing container
homogenization
annular gap
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
EP97113845A
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German (de)
English (en)
Other versions
EP0896833B1 (fr
Inventor
Alwin Berents
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.)
A Berents & Co KG GmbH
Original Assignee
A Berents & Co KG GmbH
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Filing date
Publication date
Application filed by A Berents & Co KG GmbH filed Critical A Berents & Co KG GmbH
Priority to DE59709636T priority Critical patent/DE59709636D1/de
Priority to EP97113845A priority patent/EP0896833B1/fr
Publication of EP0896833A1 publication Critical patent/EP0896833A1/fr
Application granted granted Critical
Publication of EP0896833B1 publication Critical patent/EP0896833B1/fr
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Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
    • 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

  • the invention relates to a device for homogenizing flowable Substances, in particular mayonnaises, emulsions, ointments, Creams and the like, the viscosity of which may change during of homogenization changes, with a mixing container, an am Container arranged homogenizer, an inlet for the feed the substances from the mixing tank to the homogenizer and one Drain from the homogenizer, which is connected to the Mixing container communicates.
  • Generic homogenizers are for example known from DE-PS 28 05 942.
  • the Homogenizer arranged in the bottom area of the mixing container that the inlet and outlet of the homogenizer in the bottom area of the mixing kettle open relatively close together.
  • a circulation line or bypass line is provided, from the drain of the homogenizer in the upper part of the Mixing container leads. The circulation line or bypass line is then executed lockable.
  • homogenizers allow two different homogenizers, known as “homogenizing in the mixing container” and “homogenizing in circulation or during emptying”.
  • the homogenized is returned from the mixture exiting the homogenizer discharge into the mixing container relatively close to the homogenizer feed, especially in the Area of the tank bottom.
  • this is homogenized Well returned to the top of the mixing bowl.
  • this also depends on the degree of filling of the mixing container, up to product viscosities of approximately 5000 mPas homogenization in the mixing container. The viscosity is then still low enough to redeploy the contents of the mixing bowl ensure and avoid that product mixture from the end of the Homogenizer immediately flows back to the inlet (so-called "Product short circuit").
  • Such homogenizers are very different Machine sizes executed; the container contents vary for example between 15 l and 10,000 l. Different machine types have differently powerful homogenizers different geometries. Depending on the line size, number of the bends, valves etc. also vary the delivery resistances the circulation lines. It must always be ensured that the necessary homogenization operation actually takes place, in particular, therefore, that from a certain product viscosity, if the circulation line is opened, product promotion and homogenization actually at least almost exclusively via the circulation line takes place.
  • DE-OS 195 37 303 proposes the annular gap that connects the homogenizer drain and forms the mixing container, also lockable to train.
  • the one has spring-loaded sealing element.
  • the connection as a ring channel between the outlet of the homogenizer and the interior of the mixing container are formed, wherein then the closing device should be a sealing ring which in the Mouth of the ring channel is arranged.
  • the sealing ring is through a spring pushed into its closed position, in which he Closes the circular channel from the drain.
  • the embodiment is the opening, that is, the release of the second Connection for homogenizing in the mixing tank, depending on the spring force.
  • the operating state "homogenization in the circulation process” should also according to DE-OS 195 37 303, can be selected in that the barrier the first connection between the homogenizer drain and Mixing container is opened. As long as the first connection that Circulation line, is open, the second connection through the Closing device must be closed.
  • the locking device switches (by opening) to the wrong homogenization mode just then (in the mixing container) if this is because of the very high viscosity of the mixed material is the least questionable; and the earlier, the lower the spring pressure. So would have to to achieve the goal of DE-OS 195 37 303 at all, the closing device in the second connection, between the homogenizer process and the mixing tank bottom, even at such high Pressures remain closed as they are necessary to the Line resistance in circulation also with highly viscous mix overcome.
  • the proposed spring loaded Sealing ring device in the ring channel the corresponding Springs are designed so strong that they are always larger Apply force than is necessary to reduce the line resistance in the To overcome circulation.
  • the device according to DE-OS 195 37 303 can therefore be fundamentally only operate if there are sufficient quantities of mix at high Speed of the homogenizer, i.e. processed at high capacity can be. With increasing product viscosity in mixed operation then there is an increasing increase in resistance in the closing device, which is functionally a throttle gap completely corresponds. Switching inevitably occurs homogenization in circulation, with simultaneous product short-circuit over the second connection.
  • the desired The intended closing device does not achieve the purpose as a rule to significant problems of a different kind that Devices with throttle gap do not occur. In particular this concerns the cleaning of the mixing container. If by distance of the mix and rinsing the container with cleaning solution and the like when the drain is depressurized, the locking device actually closes, as intended, is a complete one It is no longer possible to empty the mixing container after cleaning.
  • the (second) intended connection between the process and The bottom of the container is closed because the homogenizer has no pressure can build more if air is sucked in when largely emptied is so that there is washing water above the locking device accumulates, which the homogenizer cannot pump out. This can result in considerable contamination. That in the DE-OS 195 37 303 provided "cleaning in place", which the The pump effect of the homogenizer should be exploited by the provided locking device made impossible.
  • the invention solves these problems, particularly for generic ones Homogenizers with circulation line, by choosing certain ones Geometries for the annular gap.
  • a generic device is designed that the annular gap has a gap length L and a gap width S has, which are dimensioned so that the ratio L / 4S maximal is about 40 if the gap width S is greater than 0.5 mm and / or the gap length L is greater than 30 mm.
  • ratio L / 4S set a minimum value greater than 15; this concerns also geometries with gap widths S ⁇ 0.5 mm and / or gap lengths L ⁇ 30 mm.
  • the subclaims define advantageous embodiments of the Invention.
  • Such gap geometries are in particular according to the invention preferred, in which the gap width S between 0.55 mm and 1.5 mm, where the gap width is usually between 0.7 mm and will choose 1.5 mm.
  • the gap width S is particularly preferably at about 1 mm.
  • the gap length L can be relatively large, between about 5 mm and about Vary 100 mm; it is not excluded that the gap length can also be larger than 100 mm. But in particular lies the Gap length between 8 mm and 80 mm, preferably between 20 mm and 80 mm. A gap length of is currently particularly preferred about 70 mm.
  • the particularly preferred ratio of L / 4S (i.e. the gap length, divided by four times the gap width) is between 8 and 40 and most preferably around 20.
  • the ratio is L / 4S above 15.
  • the annular gap need not have a constant gap width in the course of the Have gap length. Rather, it is quite advantageous that the gap width changes over the gap length. Through that associated speed changes of the product in the gap can the resistance values and thus the viscosity-dependent Adhesion and flow behavior of the product strongly influenced in the gap and be optimized.
  • the homogenizing mixer 10 shown in FIG. 1 comprises a mixing container 11, on the bottom 11a of a gyro homogenizer 14 with an inlet 12 and an outlet 13 is fixed.
  • the Drain 13 of the gyroscope homogenizer 14 is via a three-way valve 15 with one in the upper region of the mixing container 11 leading circulation line 16 connected.
  • the Drain 13 via the three-way valve 15 with a drain line 17th connected.
  • the outlet 13 of the gyro homogenizer 14 is via an annular gap 18 connected to the mixing container 11. Also closes directly at the outlet 13 to a shut-off valve 19, which means an automatic drive 21, depending on the pressure in the Process 13 is actuated; the pressure is from a sensor 20 detected that protrudes into the process 13. The sensor 20 controls the automatic drive 21.
  • the shut-off valve 19 can also be operated manually be operated.
  • the low-viscosity mix contents are from the gyro homogenizer 14 via the inlet 12 from the mixing container 11 sucked in.
  • the gyro homogenizer 14 conveys this mix, each after the shut-off valve 19 has been set, either via the annular gap 18 back into the bottom area of the mixing container, or over the circulation line 16 in the upper region of the mixing container.
  • the homogenization takes place in the container, whereby the Mixture from the annular gap 18 at a relatively high speed and relatively low throughput.
  • the high exit speed contributes to the intensive mixing of the mixing container contents at. This intensive mixing results even with low filling of the mixing container 11. Because of the relative low throughput results in an intensive mixing and crushing effect in the gyro homogenizer itself.
  • the ratio is total gap length to four times the gap width according to the invention maximum about 40 if the gap width S is greater than 0.5 mm and / or the gap length L is greater than 30 mm.
  • the gap width S on average about 1 mm and the gap length L in total about 70 mm.
  • FIG. 2a is the inner surface of the housing provided with annular grooves that cause the annular gap to in the direction of flow, alternately expanded and narrowed again.
  • Figure 2c shows an embodiment in which corresponding grooves, and thus radial steps or shoulders, provided in both components are.
  • the total length of the annular gap consists of several gap length ranges L1, L2 ... in which the gap width S1, S2 ... is different in each case.
  • Such gap geometries are also suitable for devices which the gap width S ⁇ 0.5 mm and / or the gap length L ⁇ 30 mm. However, it is then provided that the relationship L / 4S, possibly composed of parts L1 / 4S1, L2 / 4S2 etc, is greater than 15.
  • the ratio L / 4S is the ratio L / 4S, optionally composed Individual contributions with different gap widths as defined above, around 20 ⁇ 3.
  • the geometry of the annular gap will be coordinated with the other machine parameters. Doing so the mixing tank size, the dimensions of the circulation line (if available), and the performance as well as the geometry of the homogenizer.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
EP97113845A 1997-08-11 1997-08-11 Dispositif d'homogénéisation des matiériaux aptes a couler Expired - Lifetime EP0896833B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59709636T DE59709636D1 (de) 1997-08-11 1997-08-11 Vorrichtung zum Homogenisieren fliessfähiger Stoffe
EP97113845A EP0896833B1 (fr) 1997-08-11 1997-08-11 Dispositif d'homogénéisation des matiériaux aptes a couler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97113845A EP0896833B1 (fr) 1997-08-11 1997-08-11 Dispositif d'homogénéisation des matiériaux aptes a couler

Publications (2)

Publication Number Publication Date
EP0896833A1 true EP0896833A1 (fr) 1999-02-17
EP0896833B1 EP0896833B1 (fr) 2003-03-26

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EP97113845A Expired - Lifetime EP0896833B1 (fr) 1997-08-11 1997-08-11 Dispositif d'homogénéisation des matiériaux aptes a couler

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EP (1) EP0896833B1 (fr)
DE (1) DE59709636D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007175A1 (de) * 2005-02-16 2006-08-17 Knape, Sandra Vorrichtung und Verfahren zum Homogenisieren
WO2009089837A1 (fr) * 2008-01-16 2009-07-23 Tetra Pak Scanima A/S Mélangeur hybride
EP2092975A3 (fr) * 2008-02-25 2009-09-02 LIPP Mischtechnik GmbH Dispositif de mélange doté d'un pot de mélange fixé sur un récipient de mélange

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522673C (de) * 1925-08-26 1931-04-13 Hermann Hildebrandt Vorrichtung zum Mischen, Zerstaeuben oder Vergasen von Stoffen aller Art
GB405503A (en) * 1933-05-16 1934-02-08 Fritz Garthe Improvements in or relating to mixing vessels and the like
US3305180A (en) * 1964-01-28 1967-02-21 Noble & Wood Machine Company Process of pulping and defibering paper stock and apparatus therefor
GB1296129A (fr) * 1969-04-09 1972-11-15
DE2805942A1 (de) * 1978-02-13 1979-08-16 Alwin Berents Homogenisiermischer fuer die herstellung fliessfaehiger produkte
EP0036067A2 (fr) * 1980-03-14 1981-09-23 Haagen & Rinau Dispositif de mélange et d'homogénéisation d'au moins deux matières
US4299655A (en) * 1978-03-13 1981-11-10 Beloit Corporation Foam generator for papermaking machine
US5366288A (en) * 1991-03-20 1994-11-22 Kamyr Aktiebolag Apparatus for mixing a suspension of cellulosic fibrous material and fluid
EP0760254A1 (fr) * 1995-08-29 1997-03-05 Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft Dispositif pour l'homogénéisation de matériaux coulants

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE522673C (de) * 1925-08-26 1931-04-13 Hermann Hildebrandt Vorrichtung zum Mischen, Zerstaeuben oder Vergasen von Stoffen aller Art
GB405503A (en) * 1933-05-16 1934-02-08 Fritz Garthe Improvements in or relating to mixing vessels and the like
US3305180A (en) * 1964-01-28 1967-02-21 Noble & Wood Machine Company Process of pulping and defibering paper stock and apparatus therefor
GB1296129A (fr) * 1969-04-09 1972-11-15
DE2805942A1 (de) * 1978-02-13 1979-08-16 Alwin Berents Homogenisiermischer fuer die herstellung fliessfaehiger produkte
US4299655A (en) * 1978-03-13 1981-11-10 Beloit Corporation Foam generator for papermaking machine
EP0036067A2 (fr) * 1980-03-14 1981-09-23 Haagen & Rinau Dispositif de mélange et d'homogénéisation d'au moins deux matières
US5366288A (en) * 1991-03-20 1994-11-22 Kamyr Aktiebolag Apparatus for mixing a suspension of cellulosic fibrous material and fluid
EP0760254A1 (fr) * 1995-08-29 1997-03-05 Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft Dispositif pour l'homogénéisation de matériaux coulants

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007175A1 (de) * 2005-02-16 2006-08-17 Knape, Sandra Vorrichtung und Verfahren zum Homogenisieren
WO2009089837A1 (fr) * 2008-01-16 2009-07-23 Tetra Pak Scanima A/S Mélangeur hybride
US9050568B2 (en) 2008-01-16 2015-06-09 Tetra Laval Holdings & Finance S.A. Hybrid mixer
EP2092975A3 (fr) * 2008-02-25 2009-09-02 LIPP Mischtechnik GmbH Dispositif de mélange doté d'un pot de mélange fixé sur un récipient de mélange

Also Published As

Publication number Publication date
DE59709636D1 (de) 2003-04-30
EP0896833B1 (fr) 2003-03-26

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