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EP0454811B1 - Tete melangeuse pour le moussage d'un produit avec un gaz - Google Patents

Tete melangeuse pour le moussage d'un produit avec un gaz Download PDF

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Publication number
EP0454811B1
EP0454811B1 EP90916474A EP90916474A EP0454811B1 EP 0454811 B1 EP0454811 B1 EP 0454811B1 EP 90916474 A EP90916474 A EP 90916474A EP 90916474 A EP90916474 A EP 90916474A EP 0454811 B1 EP0454811 B1 EP 0454811B1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
mixing head
stages
casing
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
EP90916474A
Other languages
German (de)
English (en)
Other versions
EP0454811A1 (fr
Inventor
Jakob Leitner
Uwe Wiedmer
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 Dr Karg GmbH
Original Assignee
Ytron Dr Karg GmbH
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
Application filed by Ytron Dr Karg GmbH filed Critical Ytron Dr Karg GmbH
Publication of EP0454811A1 publication Critical patent/EP0454811A1/fr
Application granted granted Critical
Publication of EP0454811B1 publication Critical patent/EP0454811B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • 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
    • B01F27/2721—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 provided with intermeshing elements
    • 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
    • B01F27/2723—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 the surfaces having a conical shape
    • 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
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/912—Radial flow

Definitions

  • the invention relates to a foaming-up mixing head which has a toothed rotor in a toothed stator housing, and which has feed openings for a gas and a substance of a predetermined viscosity and an outlet opening as described in the preamble of independent claim 1.
  • Mixing heads of this type are used in many areas of technology.
  • a special area of application is food processing technology, where thin to viscous substances, such as milk products, are foamed with nitrogen before they are packaged. The foaming makes the end product particularly light and loose, which increases the enjoyment when consumed.
  • the teeth of the rotor are arranged in a plurality of rows running in the circumferential direction, pointing radially outwards and aligned in the axial direction, with all teeth having essentially the same size.
  • the stator teeth are arranged in a manner complementary to the rotor teeth in such a way that the rotor and stator can be pushed one inside the other in the axial direction during assembly, and in the operating state the rows of rotor teeth lie axially offset between the rows of stator teeth.
  • the tooth width can correspond to the tooth spacing at most, so that the ratio of tooth width and tooth spacing is not particularly favorable for a number of applications.
  • a frothing mixing head of the generic type is known from DE-U-1.805.142.
  • the invention has for its object to provide a foam mixing head of the type mentioned, in which the mixing with the gas is improved.
  • the invention is based on the basic idea that the rotational speed of the ring gears increases with increasing diameter. In other words, this means that the peripheral speed increases along the flow path, so that the inevitable increase in the amount of gas in the flow path goes hand in hand with a higher circulation speed.
  • each rotor / stator ring gear differs in diameter from the adjacent ring gear, ie that there is a paired assignment. In this way, an essentially continuously expanding rotor / stator is obtained.
  • the radial passage of the material to be foamed is particularly supported in that the interdental spaces of the individual toothed rings are the same within a stator stage and / or rotor stage.
  • the gas distribution is supported in that the toothing of a rotor / stator stage is finer in comparison to the previous stage in the flow direction.
  • the cleaning of the mixing head and the maintenance of an aseptic condition when used in the food sector is facilitated in that the rotor and / or the stator are formed in one piece.
  • the individual rotor / stator stages may be releasably connected to one another.
  • the foaming-mixing head designated overall by 10, has a rotor 11 and a stator housing 12. A substance to be foamed is fed via a first feed opening 13 in an end face of the stator housing 12. A gas is added via a second feed opening 14 in the same end face. The foamed end product is discharged through a tangential outlet opening 15.
  • the frothing mixing head is constructed in three stages, i.e. the rotor 11 consists of a first, second and third series-connected rotor / stator stage 16, 17, 18, which are connected to one another at least in a rotationally fixed manner on a shaft 19.
  • Each of the rotor / stator stages 16, 17, 18 consists of a cylinder 20, 21 or a disk 22, on which, in the example shown here, three toothed rings 23, 24, 25 are arranged, which are coaxial with the shaft 19 in Direction to the two feed openings 13,14 are aligned.
  • the first rotor stage 16 assigned to the two feed openings 13, 14 has the smallest diameter.
  • the diameter of the two subsequent rotor stages 17, 18 is in each case larger by a predetermined amount in such a way that the associated toothed rings 24 and 25 are located radially outside the cylinders 20 and 21 of the preceding first and second rotor stages 16, 17.
  • the ring gears 23, 24, 25 of the three rotor stages 16, 17, 18 are in engagement with complementary ring gears 26, 27, 28 which are arranged on the stator housing 12.
  • the figure illustrates that the stator housing 12 and the stator-side ring gears 26, 27, 28, in accordance with the gradation of the rotor 11, run in the same way in three stages, which widen outwards in the direction of flow. During assembly or disassembly, the rotor 11 can therefore easily be pulled out of the stator housing 12 when a Housing cover 29 is removed.
  • the flow of a material to be foamed takes place according to arrow 30 first in the radial direction through the first rotor / stator stage 16. After the passage of the outermost stator-side ring gear, the material is passed through a conically widening space 31 according to arrow 32 into the second rotor stage 17. A passage through the second and third stages 17, 18 then takes place in the same way.
  • the rotor-side sprockets 24, 25 of the second and third rotor stages 17, 18 and the associated stator-side sprockets 27, 28 are each made finer in comparison to the sprockets 23, 26 of the first rotor / stator stage 16. With increasing mixing, the gas particle size is therefore refined, the circumferential speed also being increased compared to the previous stage due to the larger diameter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Dairy Products (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L'invention décrit une tête mélangeuse pour le moussage d'un produit avec un gaz, par exemple un produit laitier avec l'azote. La tête mélangeuse présente un rotor à couronnes dentées coaxiales disposées alternativement radialement et axialement. De ce fait, le produit à faire mousser traverse la tête mélangeuse en partie radialement et axialement, la denture des couronnes dentées montées les unes derrière les autres dans le sens axial pouvant s'affiner au fur et à mesure qu'elle se rapproche de l'ouverture de sortie. La tête mélangeuse est, de préférence, conçue en plusieurs étages, c'est-à-dire qu'à l'intérieur d'un étage rotor/stator, les couronnes dentées ont la même position axiale sans déport axial.

Claims (5)

  1. Tête mélangeuse de moussage comprenant un rotor (11) logé dans un corps de stator où ce corps de stator (12) et rotor (11) sont munis de couronnes de dents (23, 24, 25 et 26, 27, 28) qui sont orientées axialement dans des sens opposés et décalées radialement et axialement et dont le diamètre du côté de l'entrée est plus petit que celui du côté de la sortie, au moins un orifice d'alimentation frontal et un orifice d'évacuation à la périphérie du corps, et où en outre ces rotor (11) et corps de stator (12) comprennent au moins trois étages (16, 17, 18) qui possèdent chacun plusieurs couronnes de dents (23, 24, 25 et 26, 27, 28) décalées radialement qui se correspondent selon leur position axiale, l'engrenage d'un étage (16, 17, 18) rotor-stator étant plus fin en comparaison de celui de l'étage qui le précède dans le sens du flux et où entre chaque étage (16, 17, 18) rotor-stator est disposée une chambre intercalaire (31), ces étages du rotor se présentant comme des cylindres (20, 21) ou des disques (22) portant les couronnes de dents (23, 24, 25) en prise avec les couronnes de dents (26, 27, 28) complémentaires étagées du corps de rotor (12), tête caractérisée en ce que chaque couronne de dent rotor-stator se distingue par un diamètre plus grand que celui de la couronne de dent qui la précède dans le sens du flux de manière à présenter un rotor-stator étagé s'évasant continûment et en ce que la chambre intercalaire (31) entre les étages (16, 17, 18) des rotor-stator est constituée par le corps de stator (12) qui s'évase coniquement dans le sens du flux circulant.
  2. Tête selon la revendication 1, caractérisée en ce que la largeur et la distance des dents des couronnes de dents (23-28) des rotor et stator sont choisies en fonction du matériau à faire mousser.
  3. Tête selon une revendication précédente, caractérisée en ce que l'interstice (33) entre dents de chacune des couronnes de dents (23 à 28) d'un étage (16, 17, 18) de rotor-stator est pratiquement le même.
  4. Tête selon une revendication précédente, caractérisé en ce que l'un au moins des rotor (11) et corps de stator (12) est d'un seul tenant.
  5. Tête selon une des revendications précédents, caractérisée en ce que le rotor et/ou les étages (16, 17, 18) de stator sont associés les uns aux autres de manière amovible.
EP90916474A 1989-11-17 1990-11-15 Tete melangeuse pour le moussage d'un produit avec un gaz Expired - Lifetime EP0454811B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3938306A DE3938306A1 (de) 1989-11-17 1989-11-17 Mischkopf zum aufschaeumen eines stoffes mit einem gas
DE3938306 1989-11-17
PCT/EP1990/001956 WO1991007221A1 (fr) 1989-11-17 1990-11-15 Tete melangeuse pour le moussage d'un produit avec un gaz

Publications (2)

Publication Number Publication Date
EP0454811A1 EP0454811A1 (fr) 1991-11-06
EP0454811B1 true EP0454811B1 (fr) 1994-11-02

Family

ID=6393770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90916474A Expired - Lifetime EP0454811B1 (fr) 1989-11-17 1990-11-15 Tete melangeuse pour le moussage d'un produit avec un gaz

Country Status (4)

Country Link
EP (1) EP0454811B1 (fr)
JP (1) JPH04500039A (fr)
DE (2) DE3938306A1 (fr)
WO (1) WO1991007221A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19948700A1 (de) * 1999-10-05 2001-04-19 Gotthardt Thieme Vorrichtung zur Herstellung von verschäumbaren Massen
AU2002210690A1 (en) * 2000-11-10 2002-05-21 Maelstrom Advanced Process Technologies Ltd Dynamic mixer
WO2013068426A1 (fr) 2011-11-07 2013-05-16 Nestec S.A. Appareil et procédé permettant d'aérer un produit alimentaire
KR102106655B1 (ko) * 2012-05-02 2020-05-28 다우 글로벌 테크놀로지스 엘엘씨 반경류의 회전자-고정자 혼합기 및 중합체성 포말을 제조하는 방법
AU2016342216B2 (en) 2015-10-19 2019-12-12 Société des Produits Nestlé S.A. Apparatus and method for aeration of a food product
PT3615190T (pt) 2017-04-26 2021-12-15 Nestle Sa Aparelho para arejar um produto pastoso e para misturar com outro produto e método
MX2022015594A (es) 2020-07-01 2023-01-24 Nestle Sa Aparato que comprende un sistema y metodo de refrigeracion higienica.
DE102021128006A1 (de) 2021-10-27 2023-04-27 Eric Keogh Brennstoffaufbereitungseinrichtung und System mit einer Brennstoffaufbereitungseinrichtung und einer Verbrennungseinheit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1805142U (de) * 1957-11-21 1960-02-04 Forsch Inst Professor Ing Chem Vorrichtung zur kontinuierlichen cemischen und/oder physikalischen strukturwandlung von medien.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253139B1 (fr) * 1986-07-12 1992-05-27 Dorr-Oliver Deutschland GmbH Mélangeur de type rotor-stator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1805142U (de) * 1957-11-21 1960-02-04 Forsch Inst Professor Ing Chem Vorrichtung zur kontinuierlichen cemischen und/oder physikalischen strukturwandlung von medien.

Also Published As

Publication number Publication date
JPH0523821B2 (fr) 1993-04-05
DE3938306A1 (de) 1991-05-23
EP0454811A1 (fr) 1991-11-06
DE59007644D1 (de) 1994-12-08
WO1991007221A1 (fr) 1991-05-30
JPH04500039A (ja) 1992-01-09

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