EP0053759A2 - Appareil de mélange et procédé pour son nettoyage - Google Patents

Appareil de mélange et procédé pour son nettoyage Download PDF

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Publication number
EP0053759A2
EP0053759A2 EP81109898A EP81109898A EP0053759A2 EP 0053759 A2 EP0053759 A2 EP 0053759A2 EP 81109898 A EP81109898 A EP 81109898A EP 81109898 A EP81109898 A EP 81109898A EP 0053759 A2 EP0053759 A2 EP 0053759A2
Authority
EP
European Patent Office
Prior art keywords
mixing
air
cleaning
container
blades
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.)
Withdrawn
Application number
EP81109898A
Other languages
German (de)
English (en)
Other versions
EP0053759A3 (fr
Inventor
Friedrich Walter Dr. Herfeld
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0053759A2 publication Critical patent/EP0053759A2/fr
Publication of EP0053759A3 publication Critical patent/EP0053759A3/fr
Withdrawn legal-status Critical Current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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/402—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements
    • B01F33/4021—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements the gas being introduced through the shaft of the stirring element
    • 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
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/91—Heating or cooling systems using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam

Definitions

  • the invention relates to a mixing device for dry substances, in particular for mixing and cooling plastics, in the roughly cylindrical mixing container of which a mixer shaft with mixing blades is arranged so as to be drivable by a motor.
  • the object of the invention is such a design of a mixing device of the type mentioned that automatic cleaning is possible without removing the mixing tools or opening the lid.
  • air lines are arranged on the mixing blades, which are connected to an air duct of the agitator shaft and extend to the ends of the mixing blades, and that the air lines lead to nozzle orifices which lead to the container wall, bottom wall, the lid and the Walls of any cooling inserts are aligned.
  • the invention thus enables intensive cleaning of the walls of the container with compressed air.
  • the cleaning can be carried out essentially without interrupting the mixed operation.
  • tubes with nozzles are located on the mixing blades, which are connected to the air lines mentioned. This training ensures that air blowing on all surfaces in contact with the product is possible.
  • the invention relates to a method for cleaning a mixing device of the type mentioned.
  • This method for cleaning a mixing device is characterized according to the invention in that the cleaning of the inner walls de of the mixing container can be done by compressed air with the container closed.
  • the cleaning can therefore be carried out during the batch change times.
  • cleaning air is blown out while the mixing container is emptied while rotating the mixing blades.
  • the invention provides that cleaning air is blown out at periodic intervals during the mixing process. This ensures that the walls are always kept clean from the mix during the entire mixing process, so that there is always a perfect heat transfer to the heat exchange sections. This is particularly important for continuous mixed operation.
  • re-fluidization of the material to be cooled occurs through the air nozzles on the mixing blades.
  • these are primarily arranged on the outer wing ends, which extend as far as the inner wall of the tank.
  • the peripheral speed of the mixing blades alone creates an increased pressure in the material to be mixed, in particular on the wall of the container, which compresses the air by entraining air that has escaped to the center of the container and almost completely reverses the fluidization that has occurred in the heating mixer due to rapid circulation.
  • the flow properties of the mixed material deteriorate and thus the flow velocity in the boundary layer to the cooled container wall, which reduces the heat transfer from the mixed material to the cooling wall, in particular in the case of a product which is poor in free-flowing properties, and correspondingly reduces the cooling capacity.
  • the re-fluidization of the material to be mixed with the aid of the nozzle blades thus simultaneously ensures the required degree of fluidization and the required material pressure.
  • the known air cooling of mixed material by blowing artificial air into a mixing container, which takes place via a blower through the bottom, wall and lid, has the disadvantage that large ones Amounts of air are blown in, which is to be discharged via a correspondingly dimensioned filter, which has its known cleaning and air pollution problems .
  • the large amount of air causes moisture problems in the lower cooling temperature range close to room temperature.
  • the heat transfer to the cooling surface of the container is not improved without immediate air flushing, so that the efficiency of the jacket cooling is not favorably influenced by the cooling water.
  • the pressure blowing according to the invention takes place at a high pressure of 10 bar or significantly more. At this high pressure, you can get by with comparatively small amounts of air and still achieve a high cleaning effect.
  • a stirring container 1 comprises a mixing container 1 with a bottom wall 2, a peripheral wall 3 and a lid 4.
  • a stirrer shaft 5 is inserted through the bottom wall 2 in a conventional manner, which has a seam 6 with mixing blades 7.
  • the agitator shaft 5 is driven by a drive motor, not shown.
  • An air duct 8 runs through the agitator shaft 5 and is connected to an air pressure unit via a stuffing box or the like.
  • the air duct 8 extends into the hub 6 and is connected to air lines 9 which extend through the mixing blades 7 or on the same.
  • the air lines 9 are connected to nozzle orifices 10.
  • nozzles gene 10 Provided at the ends of the mixing blades there are nozzles gene 10 'provided.
  • Nozzle orifices 13 are also connected to the air lines 9 and are directed against the bottom wall 2 of the mixing container 1.
  • FIG. 1 shows the blowing area of the nozzle orifices 10.
  • the cleaning operation according to the invention is possible with the lid 4 closed.
  • Compressed air can be blown through the air lines 9 and the nozzle orifices 10 and 13, respectively, during the batch change times.
  • This compressed air strikes all wall areas of the mixing container, so that complete cleaning of the walls is possible.
  • the agitator shaft is rotated so that the wall areas are completely covered.
  • the compressed air blown out under high pressure has a strong cleaning effect, so that one can manage with a small amount of air.
  • Cleaning is also possible in such a way that a short pulse of compressed air is blown out during the mixed operation with periods between 1 and 10 seconds in order to continuously clean the walls.
  • the clean walls guarantee good and constant heat transfer for the necessary heat exchange.
  • Fig. 2 shows a modified embodiment of a mixing device.
  • An annular wall 14 is provided within the mixing container 1, which e.g. serves as a cooling wall or as a partition. With this design, cleaning is also possible in the sense of the invention, the nozzles 12 also being directed onto the ring wall 14.
  • FIG. 3 shows the application of the invention to a mixing container 1 'with a horizontally aligned agitator shaft 5'.
  • the air lines 20 and 20 ' run inside the agitator shaft 5, in supports 15 for the mixing blades 7' or in the mixing blades 7 'themselves.
  • nozzle orifices 10 are provided which are distributed such that a complete one Cleaning the walls with compressed air is possible.
  • FIG. 4 shows a modified embodiment of the invention corresponding to FIG. 1.
  • Air lines 9 are provided within the mixing blades 7. These are connected at the mixing wing ends to pipes 11 which have nozzles 12. The tubes 11 are held by supports 16. The nozzles 12 in the outer circumferential area of the mixing blades are used in particular to re-fluidize the material to be mixed. From the air line 9 go directly nozzle orifices 10, the blow opening are directed against the wall of the harness.
  • FIG. 5 A corresponding embodiment of the invention is shown in FIG. 5.
  • Fig. 6 shows an imple mentation form of a mixing container 1 with a horizontal agitator shaft 5 '. This is designed as a raw shaft. Radial struts 17 are connected to the agitator shaft 5 ', on which blow tubes 18 with nozzles 10 are seated. An intensive torturing effect is also achieved with this warning.
EP81109898A 1980-12-10 1981-11-25 Appareil de mélange et procédé pour son nettoyage Withdrawn EP0053759A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803046542 DE3046542A1 (de) 1980-12-10 1980-12-10 Mischvorrichtung und verfahren zum reinigen derselben
DE3046542 1980-12-10

Publications (2)

Publication Number Publication Date
EP0053759A2 true EP0053759A2 (fr) 1982-06-16
EP0053759A3 EP0053759A3 (fr) 1983-04-13

Family

ID=6118805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109898A Withdrawn EP0053759A3 (fr) 1980-12-10 1981-11-25 Appareil de mélange et procédé pour son nettoyage

Country Status (2)

Country Link
EP (1) EP0053759A3 (fr)
DE (1) DE3046542A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278374A2 (fr) * 1987-02-06 1988-08-17 Pharmatest Apparatebau Gmbh Dispositif de détermination de la libération de composants actifs par des produits pharmaceutiques
GB2211434A (en) * 1987-10-27 1989-07-05 Netzsch Mastermix Ltd Cleaning mixing vessel
EP0358120A2 (fr) * 1988-09-07 1990-03-14 Werner Lüber Installation de malaxage pour produits granulés, notamment pour du sable à noyaux
EP0399972A1 (fr) * 1989-05-26 1990-11-28 Steridose Systems Ab Agitateur pour utilisations aseptiques
FR2663242A1 (fr) * 1990-06-19 1991-12-20 Cadet International Dispositif de pressurisation d'emulsion comportant une phase solide, une phase liquide et un phase gazeuse.
EP0723821A1 (fr) * 1995-01-25 1996-07-31 Tsukasa Industry Co., Ltd. Système automatique de nettoyage de l'intérieur d'un dispositif de traitement de matériaux pulvérulents
US5649338A (en) * 1995-03-23 1997-07-22 Tsukasa Industry Co., Ltd. Automatic interior cleaning system for a powdered material processing device
EP0936943A1 (fr) * 1996-10-29 1999-08-25 Haltec Corporation Melangeur autonettoyant pour laitier de ciment
EP2722103A3 (fr) * 2012-10-19 2015-06-03 Harald Kniele Malaxeur à mélange forcé avec fonction d'auto-nettoyage et utilisation d'entrées d'air correspondantes
CN111703007A (zh) * 2020-06-24 2020-09-25 汪红 一种发泡聚氨酯材料制备搅拌发泡反应釜

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU197523B (en) * 1986-04-30 1989-04-28 Eroemue Es Halozattervezoe Apparatus for wetting and simultaneous mixing dustlike and/or grainlike materials
DE29621940U1 (de) * 1996-12-17 1997-02-06 Liebherr Mischtechnik Gmbh Reinigungsvorrichtung für einen Mischer, vorzugsweise Ringtellermischer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138167A (en) * 1963-06-18 1964-06-23 Sprout Waldron & Co Inc Mixer for feeds and the like
NL6516215A (fr) * 1965-12-14 1967-06-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138167A (en) * 1963-06-18 1964-06-23 Sprout Waldron & Co Inc Mixer for feeds and the like
NL6516215A (fr) * 1965-12-14 1967-06-15

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278374A2 (fr) * 1987-02-06 1988-08-17 Pharmatest Apparatebau Gmbh Dispositif de détermination de la libération de composants actifs par des produits pharmaceutiques
EP0278374A3 (fr) * 1987-02-06 1989-03-01 Pharmatest Apparatebau Gmbh Dispositif de détermination de la libération de composants actifs par des produits pharmaceutiques
GB2211434A (en) * 1987-10-27 1989-07-05 Netzsch Mastermix Ltd Cleaning mixing vessel
EP0358120A2 (fr) * 1988-09-07 1990-03-14 Werner Lüber Installation de malaxage pour produits granulés, notamment pour du sable à noyaux
EP0358120A3 (fr) * 1988-09-07 1992-03-18 Werner Lüber Installation de malaxage pour produits granulés, notamment pour du sable à noyaux
EP0399972A1 (fr) * 1989-05-26 1990-11-28 Steridose Systems Ab Agitateur pour utilisations aseptiques
EP0462875A1 (fr) * 1990-06-19 1991-12-27 Société des Techniques en Milieu Ionisant (STMI) Dispositif de pressurisation d'émulsion comportant une phase solide, une phase liquide et une phase gazeuse
FR2663242A1 (fr) * 1990-06-19 1991-12-20 Cadet International Dispositif de pressurisation d'emulsion comportant une phase solide, une phase liquide et un phase gazeuse.
EP0723821A1 (fr) * 1995-01-25 1996-07-31 Tsukasa Industry Co., Ltd. Système automatique de nettoyage de l'intérieur d'un dispositif de traitement de matériaux pulvérulents
US5649338A (en) * 1995-03-23 1997-07-22 Tsukasa Industry Co., Ltd. Automatic interior cleaning system for a powdered material processing device
EP0936943A1 (fr) * 1996-10-29 1999-08-25 Haltec Corporation Melangeur autonettoyant pour laitier de ciment
EP0936943A4 (fr) * 1996-10-29 1999-09-08
EP2722103A3 (fr) * 2012-10-19 2015-06-03 Harald Kniele Malaxeur à mélange forcé avec fonction d'auto-nettoyage et utilisation d'entrées d'air correspondantes
CN111703007A (zh) * 2020-06-24 2020-09-25 汪红 一种发泡聚氨酯材料制备搅拌发泡反应釜
CN111703007B (zh) * 2020-06-24 2021-04-13 绍兴市顺丰聚氨酯有限公司 一种发泡聚氨酯材料制备搅拌发泡反应釜

Also Published As

Publication number Publication date
DE3046542A1 (de) 1982-07-22
EP0053759A3 (fr) 1983-04-13

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