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EP4448155B1 - Dispositif de mélange de palettes et son procédé de nettoyage - Google Patents

Dispositif de mélange de palettes et son procédé de nettoyage

Info

Publication number
EP4448155B1
EP4448155B1 EP24705694.8A EP24705694A EP4448155B1 EP 4448155 B1 EP4448155 B1 EP 4448155B1 EP 24705694 A EP24705694 A EP 24705694A EP 4448155 B1 EP4448155 B1 EP 4448155B1
Authority
EP
European Patent Office
Prior art keywords
unit
mixing
shaft
feed screw
mixing device
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.)
Active
Application number
EP24705694.8A
Other languages
German (de)
English (en)
Other versions
EP4448155A1 (fr
Inventor
Marco Otero
Frieder Sorbas KLEIN
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.)
Buehler AG
Original Assignee
Buehler 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
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP4448155A1 publication Critical patent/EP4448155A1/fr
Application granted granted Critical
Publication of EP4448155B1 publication Critical patent/EP4448155B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/06—Mixing of food ingredients

Definitions

  • the present invention relates to a paddle mixing device, in particular a preconditioner, for an extruder for producing a food or animal feed.
  • Extruders are machines in which materials such as polymers, elastomers, or protein-containing mixtures can be processed under desired pressure and temperature conditions for the production of food products, including cereals, snacks, pet food, and alternative foods.
  • a typical extruder comprises at least one extruder screw, each of which has a set of extruder screw elements mounted on a support shaft.
  • the extruder screw shafts are housed in a cylinder called a barrel.
  • An extruder typically comprises several barrels connected end-to-end. Multiple barrels are required to perform the various processes performed in the extruder, such as conveying, kneading, mixing, devolatilization, dosing, and the like.
  • Preconditioners are often used in combination with extruders or other equipment for the preparation and mixing of food and feed products. For example, one or more flours or a concentrate/isolate are treated with water/steam and/or other additives for subsequent extrusion. In the preconditioner, the materials to be treated are first mixed with water and then treated with steam before entering the extruder.
  • a suitable preconditioner is, for example, from the DE 197 43 470 A1
  • This preconditioner includes a A mixing unit and a dwell unit, with the mixing unit located above the dwell unit. Both units contain at least one shaft with attached paddles to convey material through the corresponding unit. By separating the mixing unit from the dwell unit, optimal, intensive mixing of the material can be achieved at high shaft rotation speeds, while also allowing the material to remain in the dwell unit under gentle conditions at a slow shaft rotation speed.
  • a screw conveyor may be provided to transport the material from the material outlet of the dwell unit to the material inlet of the extruder.
  • the mixing unit and the dwell unit are equipped with doors on both sides that can be folded up, thus making the interior of both units accessible for cleaning purposes. This is still not optimal.
  • a dosing and mixing device according to the preamble of claim 1 is described.
  • a pivoting door is arranged along the central axis of the mixing container, which can be opened for cleaning purposes.
  • the present invention relates to a paddle mixing device, in particular a preconditioner, comprising a cylindrical mixing unit with a shaft arranged in the mixing unit, wherein the shaft has paddles and the mixing unit has a base area, characterized in that closable openings are provided in the base area for introducing a cleaning device into the mixing unit.
  • the present invention is based on the idea of providing openings in the base area of a cylindrical unit of a paddle mixing device through which a cleaning device can be introduced into the interior of the unit in order to clean it.
  • the paddle mixing device comprises a cylindrical mixing unit.
  • Such mixing units are known and comprise a material inlet through which material can be introduced into the mixing unit.
  • the material inlet is usually arranged such that material can be introduced into the mixing unit by means of gravity.
  • a shaft is provided which extends over the entire length of the mixing unit and on which paddles are arranged. With the aid of a drive such as an electric motor, the shaft can be set in a rotary motion and transport material in the mixing unit through the mixing unit.
  • the mixing unit further comprises one or more additional inlets for introducing a liquid such as water and/or a gas such as water vapor into the mixing unit.
  • the cylindrical mixing unit further comprises a base surface facing away from the side on which the drive is located.
  • This base surface provides closable openings for introducing a cleaning device into the mixing unit. It would also be conceivable to provide closable openings in the base surface on which the drive is located for introducing a cleaning device into the mixing unit.
  • This is preferably a round opening with a diameter that allows the insertion of a conventional cleaning device such as a spray lance (for example, from Kärcher).
  • a conventional cleaning device such as a spray lance (for example, from Kärcher).
  • the diameter of the opening is preferably in the range of 10-80 mm, preferably in the range of 10-45 mm, and more preferably 15 to 30 mm.
  • the diameter of the opening is preferably selected in relation to the diameter of a spray lance used for cleaning such that the ratio r (d(opening)/d(spray lance) is in the range from 4 to >1, preferably 3 to >1, more preferably 2 to >1, and particularly preferably 1.5 to >1.
  • a lance diameter of 16 mm a bore diameter of 17 mm could be selected. In this way, prevents too much cleaning fluid from escaping from the opening during a cleaning process.
  • this opening is preferably provided with a fastening device such as a thread to securely close the opening, for example, with a closed screw nut.
  • a fastening device such as a thread to securely close the opening, for example, with a closed screw nut.
  • the opening should be closed during operation of the mixing unit.
  • the opening can preferably be additionally sealed with a plug, optionally in combination with an O-ring seal.
  • the plug and O-ring seal are preferably made of an elastic material such as rubber.
  • the elements for closing the opening(s) can preferably be installed and removed without tools, for example by using blind plugs.
  • the base has 2-8, preferably 2-6, more preferably 3-6, and particularly preferably 4 closable openings for inserting a cleaning device.
  • the interior of the mixing unit is divided into four segments, each of which occupies approximately a quarter of the cross-section of the cylindrical mixing unit.
  • the cleaning device is inserted successively into four openings assigned to the corresponding segments, with one opening opening into each of these segments.
  • the base surface is provided with a The cover is covered. This way, the closable openings located in the base are concealed from the outside and cannot, for example, be accidentally opened during operation.
  • the opening(s) are of such a length that, even if the opening in question is not closed, reaching through the opening to a shaft rotating during operation is not possible (ISO 13857). Monitoring of open openings is then unnecessary.
  • a cylindrical dwelling unit with a shaft arranged in the dwelling unit is additionally provided with the mixing unit, wherein the shaft has paddles and the dwelling unit has a base area, wherein the dwelling unit is preferably arranged below the mixing unit, wherein closable openings for introducing a cleaning device into the dwelling unit are provided in the base area of the cylindrical dwelling unit.
  • Retention devices are known from conventional preconditioners, as described above.
  • a shaft is provided in the retention unit, extending the entire length of the retention unit and on which paddles are arranged. With the aid of a drive such as an electric motor, the shaft can be set in rotation and convey material contained in the retention unit through the retention unit.
  • the material is conveyed into a separate Transferred to the dwell unit.
  • the mixing unit and the dwell unit are preferably arranged one above the other, with the mixing unit above the dwell unit, in order to transfer the material from the mixing unit to the dwell unit by gravity.
  • the mixing unit and the dwell unit are particularly preferably connected to each other by a closed line, with this line preferably being arranged at the end of the mixing unit furthest from the material inlet.
  • this line preferably being arranged at the end of the mixing unit furthest from the material inlet.
  • the dwell unit also has a material outlet. This is preferably located on the underside of the dwell unit so that the material can be transferred by gravity from the dwell unit into a screw conveyor unit or directly into the extruder.
  • the residence unit and the screw conveyor unit or extruder are particularly preferably connected to one another by a closed line, wherein this line is preferably arranged at the end of the residence unit which is furthest away from the connecting line to the mixing unit.
  • this line is preferably arranged at the end of the residence unit which is furthest away from the connecting line to the mixing unit.
  • a cylindrical screw conveyor unit connected to the dwell unit is additionally provided, with a shaft arranged in the screw conveyor unit, wherein the shaft has paddles and the screw conveyor unit has a base area, wherein the screw conveyor unit is preferably arranged below the dwell unit, wherein in the base area of the cylindrical screw conveyor unit there are closable openings for introducing a cleaning device into the screw conveyor unit.
  • Conveyor screw units are familiar from conventional extruders with preconditioners.
  • the conveyor screw unit features a shaft that extends the entire length of the conveyor screw unit and on which paddles are arranged. With the aid of a drive such as an electric motor, the shaft can be set in rotation, conveying material contained in the conveyor screw unit through the conveyor screw unit.
  • the screw conveyor unit further comprises a material outlet. This is preferably arranged on the underside of the screw conveyor unit so that the material can be Gravity can be transferred from the screw conveyor unit into the extruder.
  • the conveyor screw unit and the extruder are particularly preferably connected to one another by a closed line, this line preferably being arranged at the end of the conveyor screw unit which is furthest away from the connecting line to the residence unit.
  • a bypass is preferably arranged on the conveyor screw unit, which bypass can be opened and closed with a flange plate arranged coaxially to the shaft provided in the conveyor screw unit.
  • a bypass is well known.
  • a bypass is used to initially direct product out of the device via a bypass outlet when the device is started up, rather than into the product stream. This allows material that is formed during device start-up but does not yet meet the product specifications to be removed from the device to prevent contamination.
  • bypass is arranged on the screw conveyor unit, the preconditioning of the product can continue even in the event of a malfunction of the downstream extruder; the preconditioned product is then fed into a container through the bypass outlet.
  • bypass outlet In a conventional bypass, the bypass outlet is closed with a slide plate, which can preferably be moved horizontally back and forth pneumatically.
  • the slide and the bypass outlet are usually located below the material inlet.
  • Due to the cylindrical The shape of the screw conveyor unit and the necessarily curved shape of the slide plate create dead spaces in which large amounts of material can remain. This is undesirable for product safety reasons. Cleaning and sealing this bypass is also difficult.
  • the bypass is opened and closed by a flange plate arranged coaxially with the shaft provided in the screw conveyor unit.
  • the bypass is opened and closed by moving a flange plate from a first position in the screw conveyor unit to a second position in the screw conveyor unit.
  • the flange plate In the first position, the flange plate is located between the material inlet and the bypass outlet, separating the interior of the screw conveyor unit into two separate sections. One section contains the bypass outlet, and the other contains the material inlet and the remaining interior of the screw conveyor unit. Product introduced through the material inlet cannot enter the bypass outlet because the flange plate separates the interior of the screw conveyor unit into two separate sections that are not fluidically connected.
  • the flange plate divides the interior of the screw conveyor unit into two other separate sections, with the bypass outlet and the material inlet located at least partially in one section. Product introduced through the material inlet can now flow into the bypass outlet.
  • the flange plate can be moved from the first to the second position by conventional means.
  • the flange plate is moved by one or more pneumatic cylinders.
  • This flange plate which is arranged coaxially to the screw conveyor shaft, prevents dead spaces.
  • the flange plate can be provided with seals such as O-rings made of an elastic material such as rubber.
  • the bypass with flange plate according to the invention can generally be used for any paddle mixing device, in particular any preconditioner, or any extruder, and is not limited to the present device.
  • the paddle mixing device according to the invention in particular preconditioner, can be arranged on any conventional extruder.
  • the present invention thus also relates to an extruder comprising a paddle mixing device according to the invention as described above, in particular a preconditioner.
  • Extruders are well known.
  • Such extruders preferably have an L/D ratio (total length to screw diameter) in the range of 12 to 60, preferably 20 to 40.
  • the extruders are preferably operated at 100 to 1000 rpm, more preferably at 200 to 600 rpm, and most preferably at 250 to 350 rpm.
  • the extruder according to the invention comprises a motor with a gearbox to drive the extruder screws.
  • the support shaft of each extruder screw is operatively connected to the gearbox. This can be done in a conventional manner.
  • the extruder according to the invention further comprises an extruder barrel with a process zone located within the barrel and an inlet and outlet.
  • the extruder barrel preferably comprises 2 to 20 barrels, more preferably 2 to 15 barrels.
  • the barrels are preferably connected to one another at the end faces and together form the extruder barrel.
  • the extruder barrel (or each of the barrels comprising the extruder barrel) has a through-bore. This through-bore runs axially through the entire length of the extruder barrel. The extruder's processing zone is located within this through-bore.
  • the extruder housing is preferably temperature-controlled.
  • the material to be extruded is kneaded under pressure (usually 1 to 400 bar, preferably 1 to 200 bar) to form a homogeneous mixture. This usually involves a Energy consumption of 10 to 150 Wh/kg, preferably 10 to 120 Wh/kg, particularly preferably 15 to 30 Wh/kg.
  • the extruder inlet is used to introduce raw materials into a first section of the extruder. This inlet opens into the process zone.
  • the inlet is usually and preferably located on the extruder barrel, allowing material to enter the extruder barrel, or more precisely, the process zone, under the influence of gravity.
  • the inlet of the extruder is connected to the preconditioner described above, either to the material outlet of the residence unit or to the material outlet of the screw conveyor unit (if present).
  • the material to be extruded can be fed directly into the process zone through the inlet.
  • a metering device is preferably located above the inlet, with which the material to be extruded is metered and, if necessary, mixed before it is fed through the inlet.
  • the material to be extruded can preferably be pretreated in a conventional preconditioner and fed from there to the inlet, for example, by means of a conventional screw conveyor.
  • the extruder typically also has a water, oil and possibly a steam supply line.
  • a cooling tool such as a cooling nozzle
  • a cooling tool can be provided at the extruder outlet. Cooling tools for extruders are well known.
  • a known distribution unit can preferably be arranged between the extruder and the cooling tool.
  • the method can be carried out (and is preferably carried out) with any closable opening arranged on the unit.
  • the mixing unit, dwell unit, and conveyor screw unit of the paddle mixing device according to the invention can be cleaned simultaneously or sequentially, in particular through all openings arranged thereon.
  • a shaft located in the unit to be cleaned must be moved into a position that does not obstruct the insertion of the cleaning device into the unit to be cleaned. If necessary, the shaft can be moved using the unit's motor or manually, for example, using a tool that can be inserted into a hole in the shaft. such as a screwdriver, into the desired position.
  • the cleaning device preferably feeds a liquid into the unit to be cleaned, which liquid is at a pressure exceeding normal pressure.
  • this liquid is pressurized water.
  • a closable opening on one of the units is opened.
  • the opening is closed with a closed screw nut (nut) or knurled nut, which is loosened from a thread to open the opening (manually or using known tools). If there is a plug in the opening, this must also be removed.
  • the cleaning device for example, a commercially available cleaning lance, is inserted into the opening.
  • the cleaning device has a tube whose length corresponds to the axial extent of the unit to be cleaned. With such a cleaning device, the corresponding unit can be cleaned across its entire axial extent.
  • FIG. 1 A schematic view of an embodiment of an extruder 7 according to the invention with a paddle mixing device 1 is shown. The product flow through the device is indicated by black arrows.
  • the paddle mixing device 1 comprises a cylindrical mixing unit 2 with a material inlet arranged on the mixing unit 2.
  • the base area 2b ( Fig. 2 ) of the mixing unit 2 is covered with a cover 2a.
  • a (not shown) shaft with paddles which can be set into a rotary movement by means of a (not shown) drive.
  • a cylindrical retention unit 3 is arranged, which is connected to the mixing unit 2 via a line.
  • This line is arranged at the end of the mixing unit 2 remote from the material inlet, so that material flows through the entire length of the mixing unit 2 before it passes through this line into the retention unit 3 by gravity.
  • the base area 3b ( Fig. 2 ) of the dwell unit 3 is covered with a cover 3a.
  • a shaft (not shown) with paddles is arranged in the dwell unit 3, which can be set in a rotary motion by means of a drive (not shown).
  • a cylindrical screw conveyor unit 4 is arranged, which is connected to the dwell unit 3 via a material outlet 5.
  • This material outlet 5 is arranged at the end of the dwell unit 3 remote from the line from the mixing unit 2, so that material flows through the entire length of the dwell unit 3 before it reaches the screw conveyor unit 4 through this line by means of gravity.
  • the base area 4b ( Fig. 2 ) of the screw conveyor unit 4 is covered with a cover 4a.
  • a (in Fig. 4a and 4b shown) shaft 4f with paddles 4g, which are arranged by means of a (in Fig. 4a and 4b shown) drive 11 can be set into a rotary movement.
  • a bypass 6 is arranged, which comprises a bypass outlet 6a.
  • a preferred embodiment of this Bypasses 6 will be described below with reference to Fig. 4a and 4b described.
  • the screw conveyor unit 4 is fluidically connected to an inlet of the extruder 7, so that material from the screw conveyor unit 4 can reach the process zone 9 of the extruder 7.
  • a screw conveyor 9a is arranged, which can be set in a rotary motion by means of the drive 8 of the extruder 7 in order to convey material through the process zone 9. Further details of the extruder 7 are known and in Fig. 1 not shown.
  • each of the openings 2c, 3c, 4c provides access to an area of the unit 2, 3, 4. This area corresponds to a quarter of the cross-sectional area of the unit 2, 3, 4. If a cleaning device (not shown) is inserted successively into each of the openings 2c, 3c, 4c, the unit 2, 3, 4 can be completely cleaned.
  • the openings 2c, 3c, 4c protrude from the base surface 2b, 3b, 4b and have a fastening element such as a thread in this protruding section.
  • a fastening element such as a thread in this protruding section.
  • This thread For example, a screw nut 2d, 3d, 4d can be applied, as in Fig. 3 described.
  • FIG. 3 A schematic view of an embodiment of a unit 2, 3, 4 according to the invention with a closed opening 2c, 3c, 4c is shown.
  • the explanations apply equally to a mixing unit 2, a dwell unit 3, and a screw conveyor unit 4 and all openings 2c, 3c, 4c arranged thereon.
  • Fig. 4a a schematic view of an embodiment of a bypass 6 according to the invention is shown in the closed state.
  • a shaft 4f with paddles 4g located thereon is rotatably arranged in the screw conveyor unit 4.
  • the Fig. 4a The shaft 4f with paddles 4g shown corresponds analogously to the shafts with paddles arranged in the mixing unit 2 and the dwell unit 3.
  • the shaft 4f can be set into a rotary movement by means of a drive 11.
  • a bypass 6 is arranged between the drive 11 and the material outlet 5.
  • the bypass 6 includes a bypass outlet 6a through which material can be discharged from the screw conveyor unit 4 as needed without reaching the extruder 7.
  • the bypass 6 further comprises a flange plate 10, which is arranged coaxially to the shaft 4f in the screw conveyor unit 4 and by means of (in Fig. 4a and 4b two) pneumatic cylinders can be moved to the left and back again according to the dashed double arrow.
  • Fig. 4a The flange plate 10 is in a position blocking access to the bypass outlet 6a.
  • the shaft 4f is driven forward in the direction (shown by the dotted arrow) toward the extruder 7. Material entering the screw conveyor unit 4 through the material outlet 5 is conveyed toward the extruder 7 according to the thick arrows.
  • Fig. 4b The flange plate 10 is in a position that allows access to the bypass outlet 6a.
  • the flange plate 10 has been Fig. 4a moved to the left by means of the pneumatic cylinders 12.
  • the shaft 4f is driven backward in the direction (indicated by the dotted arrow) toward the bypass outlet 6a. Material entering the screw conveyor unit 4 through the material outlet 5 is conveyed toward the bypass outlet 6a according to the thick arrows.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (14)

  1. Dispositif de mélange de palettes (1), en particulier préconditionneur, comprenant une unité de mélange cylindrique (2) avec un arbre disposé dans l'unité de mélange, l'arbre comportant des palettes et l'unité de mélange présentant une surface de base (2b),
    caractérisé en ce que des ouvertures (2c) pouvant être fermées sont prévues dans la surface de base (2b) pour l'introduction d'un dispositif de nettoyage dans l'unité de mélange (2).
  2. Dispositif de mélange de palettes selon la revendication 1, caractérisé en ce qu'il est en outre prévu une unité de séjour cylindrique (3) reliée à l'unité de mélange (2) et comportant un arbre disposé dans l'unité de séjour, l'arbre comportant des palettes et l'unité de séjour (3) présentant une surface de base (3c), l'unité de séjour (3) étant de préférence disposée en dessous de l'unité de mélange (2), des ouvertures (3c) pouvant être fermées étant prévues dans la surface de base (3b) de l'unité de séjour cylindrique (3) pour l'introduction d'un dispositif de nettoyage dans l'unité de séjour (3).
  3. Dispositif de mélange de palettes selon la revendication 1 ou 2, caractérisé en ce qu'il est en outre prévu une unité à vis sans fin cylindrique (4) reliée à l'unité de séjour (3) et comportant un arbre (4f) disposé dans l'unité à vis sans fin (4), l'arbre (4f) comportant des palettes (4g) et l'unité à vis sans fin (4) présente une surface de base (4b), l'unité à vis sans fin (4) étant de préférence disposée en dessous de l'unité de séjour (3), des ouvertures (4c) pouvant être fermées étant prévues dans la surface de base (4b) de l'unité à vis sans fin cylindrique (4) pour l'introduction d'un dispositif de nettoyage dans l'unité à vis sans fin (4).
  4. Dispositif de mélange de palettes selon l'une des revendications 1 à 3, caractérisé en ce que sur au moins une unité choisie parmi le groupe constitué de l'unité de mélange (2), l'unité de séjour (3) et l'unité à vis sans fin (4), une surface de base (2b, 3b, 4b) avec 2 à 8, de préférence 2 à 6, plus préférablement 3 à 6 et particulièrement préférablement 4 ouvertures (2c, 3c, 4c) pouvant être fermées est présenté pour l'introduction d'un dispositif de nettoyage.
  5. Dispositif de mélange de palettes selon l'une des revendications 1 à 4, caractérisé en ce que les ouvertures pouvant être fermées (2c, 3c, 4c) sont fermées par un écrou (2d, 3d, 4d).
  6. Dispositif de mélange de palettes selon l'une des revendications 1 à 5, caractérisé en ce qu'un bouchon (2e, 3e, 4e) est disposé dans les ouvertures pouvant être fermées (2c, 3c, 4c).
  7. Dispositif de mélange de palettes selon l'une des revendications 1 à 6, caractérisé en ce qu'un couvercle (2a, 3a, 4a) est disposé au-dessus des ouvertures pouvant être fermées.
  8. Dispositif de mélange de palettes selon l'une des revendications 3 à 4, caractérisé en ce qu'une dérivation (6) est disposée sur l'unité à vis sans fin (4), laquelle peut être ouverte et fermée à l'aide d'une plaque à bride (10) disposée coaxialement à l'arbre (4f) prévu dans l'unité à vis sans fin (4).
  9. Extrudeuse (7), comprenant un dispositif de mélange de palettes (1) selon l'une des revendications 1 à 8.
  10. Procédé de nettoyage d'un dispositif de mélange de palettes (1) selon l'une des revendications 1 à 8, comprenant les étapes suivantes :
    - ouverture d'une ouverture pouvant être fermée (2c, 3c, 4c) dans une surface de base (2b, 3b, 4b) d'au moins une unité choisie parmi le groupe constitué de l'unité de mélange (2), de l'unité de séjour (3) et de l'unité à vis sans fin (4) ;
    - introduction d'un dispositif de nettoyage dans l'ouverture ouverte (2c, 3c, 4c) ;
    - nettoyage de la au moins une unité (2, 3, 4) à l'aide du dispositif de nettoyage introduit.
  11. Procédé selon la revendication 10, caractérisé en ce que le procédé peut être mis en œuvre avec chaque ouverture pouvant être fermée (2c, 3c, 4c) qui est disposée sur l'unité (2, 3, 4).
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que le dispositif de nettoyage achemine dans l'unité à nettoyer (2, 3, 4) un liquide qui est sous une pression supérieure à la pression normale.
  13. Procédé selon l'une des revendications 10 à 12, caractérisé en ce que le dispositif de nettoyage comporte un tube dont la longueur correspond à l'extension axiale de l'unité à nettoyer (2, 3, 4).
  14. Procédé selon l'une des revendications 10 à 13, caractérisé en ce qu'une dérivation (6) disposée sur l'unité à vis sans fin est ouverte afin d'évacuer le liquide introduit dans l'unité à nettoyer (2, 3, 4) dehors le dispositif de mélange de palettes (1).
EP24705694.8A 2023-03-03 2024-02-21 Dispositif de mélange de palettes et son procédé de nettoyage Active EP4448155B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23159837 2023-03-03
PCT/EP2024/054441 WO2024184075A1 (fr) 2023-03-03 2024-02-21 Dispositif de mélange à palettes et son procédé de nettoyage

Publications (2)

Publication Number Publication Date
EP4448155A1 EP4448155A1 (fr) 2024-10-23
EP4448155B1 true EP4448155B1 (fr) 2025-09-10

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EP24705694.8A Active EP4448155B1 (fr) 2023-03-03 2024-02-21 Dispositif de mélange de palettes et son procédé de nettoyage

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EP (1) EP4448155B1 (fr)
CN (1) CN120712136A (fr)
DK (1) DK4448155T3 (fr)
WO (1) WO2024184075A1 (fr)

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DE19743470A1 (de) 1997-10-01 1999-04-08 Buehler Ag Verfahren und Vorrichtung zum Vorkonditionieren des in einem Extruder zu verarbeitenden Produktes und dgl.
NL2000633C2 (nl) * 2007-05-07 2008-11-10 Pelleting Technology Nederland Menginrichting.
ES2672262T3 (es) 2011-05-13 2018-06-13 Ojah B.V. Método de preparación de composiciones estructuradas a base de proteína
DE102018129148A1 (de) * 2018-11-20 2020-05-20 Gericke Ag Dosier- und Mischsystem

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DK4448155T3 (da) 2025-12-08
WO2024184075A1 (fr) 2024-09-12
CN120712136A (zh) 2025-09-26
EP4448155A1 (fr) 2024-10-23

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