EP0201927B1 - Vorrichtung zum Mischen und Dispergieren mindestens zweier Medien - Google Patents

Vorrichtung zum Mischen und Dispergieren mindestens zweier Medien Download PDF

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Publication number
EP0201927B1
EP0201927B1 EP86106666A EP86106666A EP0201927B1 EP 0201927 B1 EP0201927 B1 EP 0201927B1 EP 86106666 A EP86106666 A EP 86106666A EP 86106666 A EP86106666 A EP 86106666A EP 0201927 B1 EP0201927 B1 EP 0201927B1
Authority
EP
European Patent Office
Prior art keywords
rotor
outlet
tube
media
radially
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
EP86106666A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0201927A3 (en
EP0201927A2 (de
Inventor
Hanspeter Seeger
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.)
Ystral GmbH Maschinenbau und Processtechnik
Original Assignee
Ystral GmbH Maschinenbau und Processtechnik
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 Ystral GmbH Maschinenbau und Processtechnik filed Critical Ystral GmbH Maschinenbau und Processtechnik
Priority to AT86106666T priority Critical patent/ATE82873T1/de
Publication of EP0201927A2 publication Critical patent/EP0201927A2/de
Publication of EP0201927A3 publication Critical patent/EP0201927A3/de
Application granted granted Critical
Publication of EP0201927B1 publication Critical patent/EP0201927B1/de
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
    • B01F27/80—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
    • B01F27/812—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 the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens
    • 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
    • B01F33/86—Mixing heads comprising a driven stirrer
    • B01F33/862—Mixing heads comprising a driven stirrer the stirrer being provided with a surrounding stator

Definitions

  • the invention relates to a device for mixing and dispersing at least two media according to the preamble of claim 1.
  • a device known from DE-OS 27 02 183 has a mixing head and a dispersing device connected in series in the axial direction in order to combine the mixing action of the mixing head designed as a guide jet mixer and the dispersing action of the shear ring of the dispersing device.
  • the dispersing device consists of a separate stator tube in the extension of the stator tube of the mixing head, a special rotor, the rotor tube of which is an extension of the rotor tube of the rotor of the mixing head, and a continuous bottom section on the rotor.
  • a beacon mixer is also used, in which the media are mixed with one another by rotating the rotor and by virtue of the circulation also brought about by the rotation of the rotor.
  • this device however, essentially only mixing is achieved.
  • dispersing is possible due to the presence of individual dispersing elements, the dispersal affects the circulation of the material or the circulation speed, since the dispersion takes place in the main stream. The dispersing effect is consequently imperfect.
  • Fine device of the generic type is described in DE-OS 26 30 200.
  • This known device serves to prepare a cement slurry consisting of a water / cement mixture in a high-shear force mixing process and then to mix fiberglass strands into this cement slurry in a low-shear force mixing process. The preparation and mixing takes place when the slurry is conveyed upward in the device from bottom to top, the high-shear mixing process and the low-shear mixing process being brought about by different speeds of the rotor.
  • This known device has at its lower end a fixed tube with an upright axis, in the jacket of which a plurality of round radial holes are arranged. A rotatably mounted rotor with rotor blades is arranged in the tube.
  • Extending radially outward from the upper end of the tube is an annular flange, to which a plurality of guide rods are fastened and evenly distributed on the circumference, and which protrude upwards and serve to guide a deflection plate with guide holes which are penetrated by the guide rods and which are arranged at a distance above the annular flange and is adjustable in height.
  • a deflection plate with guide holes which are penetrated by the guide rods and which are arranged at a distance above the annular flange and is adjustable in height.
  • the invention has for its object to develop a device of the type mentioned in such a way that a larger part of the at least premixed media can be safely dispersed.
  • the main advantage of the embodiment according to the invention is that it enables simultaneous mixing and dispersion without mutual hindrance. These two processes are not integrated into one another within one stream, but rather each take place in a partial stream, the dispersion stream being directed radially on account of the centrifugal force of the mixture parts rotated by the rotor.
  • the radial acceleration of the at least premixed components is thus used for the more intensive operation of the device, namely the dispersing, in which the media present in the partial flow are disrupted and finely distributed by supporting the radial acceleration.
  • the proportion of dispersing and mixing work can also be determined by dimensioning the size of the outlet opening. This depends on the degree of dispersion and the type of media to be treated.
  • the size can both be immutable for certain media can also be determined continuously or in stages (claim 7) for different media and / or different mixing or dispersion results.
  • the size of the outlet opening for the mixed partial flow can assume relatively small amounts, the outlet opening can even be completely closed under certain circumstances, so that only the dispersed partial flow exits the stator exclusively through the openings for this partial flow.
  • the configuration according to the invention is of particular importance for all processes which begin with the use of powder and require a lump-free and agglomerate-free disruption of the materials to be treated in the further treatment.
  • Conventional dispersion systems have the disadvantage that, although they emulsify satisfactorily, they do not provide the circulating power for drawing in powder or other light materials. This means that especially in the critical phase, namely towards the end of the wetting process, lumps of powder float on the surface with an already increased viscosity that can no longer be pulled down and dispersed.
  • the entire process for powder wetting and subsequent homogenization of the powder or emulsification proceeds without problems and without difficult procedural measures. Compared to conventional systems, this means a significant saving of time or an increase in quality and an increase in production reliability. This applies especially to emulsions, the stability of which can often not be predetermined.
  • An advantageous further development of the invention consists in that the openings for the dispersed partial stream are formed by axially extending slots.
  • This configuration enables a large number of slots lying in the direction of rotation of the rotor, as a result of which the dispersion capacity and the dispersion effect are increased.
  • the latter is also improved by the known configuration according to claim 5, created by the sheared edges at the opening edges and on the rotor blades, which enable a fine disintegration of the materials to be dispersed.
  • the embodiment according to claim 8 is recommended, in which annular outlet cross sections can be realized.
  • the formation of the adjustable closure member as a baffle plate according to claim 9 is recommended for structural reasons.
  • An alternative measure for changing the size of the outlet opening is according to Claim 13 in changing the distance between the device and the bottom of the container in which the device is in operation with the media to be treated. As this distance decreases, the size of the outlet for the mixed partial flow also decreases. When the device rests on the underside on the bottom of the container, the outlet is completely closed, so that full flow dispersion takes place. With increasing distance from the bottom of the container, the proportion of dispersion can be reduced again. For the dependency of these measures, reference is made to the description of claim 7.
  • a device for the measure described above can be of simple construction within the scope of the invention. It includes a container or other abutment, for. B. the container supporting base supportable frame which has a holding device for the device according to the invention, the holding device being axially adjustable to the device according to the invention and being fixable in the respective position on or in the frame.
  • the device generally designated 1 in the figures, consists of a rotor, generally designated 2, which is mounted in a tubular stator 4 so as to be rotatable about an axis of rotation 3.
  • the rotor 2 has a plurality of radially extending rotor blades 5 and is fastened to a vertically extending drive shaft 6 which is arranged within a protective tube 7 which carries the stator 4 and is connected to the latter by means of radially extending struts 8.
  • the stator 4 consists of a vertically arranged tube 9 which is expanded in the shape of a trumpet on the upper side and with these edges 11 delimits an inlet, generally designated 12, for the materials to be treated.
  • the struts 8 pass through this inlet 12 and connect the tube 9 to a sleeve 13 which is fastened on the protective tube 7.
  • the tube 9 of the stator 4 is drawn in in the form of a radially extending annular wall 14 which encloses an outlet 15.
  • the hollow cylindrical Wall section of the tube 9 and the annular wall 14 form a corner or inner shoulder of the stator 4, in which the rotor 2 is arranged.
  • baffle plate 19 is axially adjustable in a manner not shown and can be locked in the respective position.
  • the adjustability of the baffle plate 19 is shown by a double arrow 21.
  • the diameter d of the rotor 2 is dimensioned so large that there is only a small gap s between the inner wall 22 of the tube 9 and the lateral surfaces 23 of the rotor 2. This gap s also extends between the side 24 of the rotor facing the outlet 15 and the inside 25 of the ring wall 14. Between the inside wall 22 and the inside 25 of the stator 4 and the lateral surface 23 and the side 24 of the rotor 2, a generally arises with 26 designated shear field, its stator side Shear edges 27 are formed by the inner edges 28 and its rotor-side shear edges 29 by the outer edges 31 and the lateral edges 32 of the rotor 2.
  • the rotor blades 5 are set. This can be seen on the inclined side surfaces, which are designated by 33 in FIG. 2. Due to the setting of the rotor blades 5 of the rotor 2 rotating during operation in the direction of the arrow 34, the material to be treated, which consists of at least two different substances or media, is sucked into the stator 4 in the direction of the arrows 35 through the inlet 12. In the area of the rotor 2, the material is intimately mixed with one another, and it divides into an axial, generally 36 and a radial, generally 37 partial flow due to two feed forces. The partial flows are identified by radial and axial arrows.
  • the axial partial flow 36 is a ring flow, and it is based on axial feed or acceleration forces which are caused by the setting of the rotor blades 5.
  • the radial partial flow 37 spreads from the entire circumference of the stator 4 and is based on feed or acceleration forces which are caused by the centrifugal force of the material parts rotating with the rotor 2.
  • Those located in the axial partial flow 36 Materials are mainly mixed intensively with one another, while the materials located in the radial partial flow 37 are subject to strong shear and impact effects in the shear field 26, as a result of which the desired dispersion and emulsification is effected.
  • the proportion of the dispersion work in the radial partial flow 37 can be controlled by appropriate dimensioning of the distance a between the baffle plate 19 and the ring wall 14.
  • the distance a determining the cross section of the outlet 15 should be selected to be relatively large. This is e.g. B. the case when light substances are to be incorporated, for. B. powders, which require a relatively large suction to pull them down from the surface of the material to be treated in the area of the stator.
  • the baffle plate 19 differs from the one described above only in that the baffle plate 19 is not present.
  • the device 1 for controlling the desired amount of dispersion or mixing work is axially adjusted relative to the bottom 43 of the container 42.
  • the proportion of the dispersion work is also determined by the size or length 1 of the slots 16. In the present exemplary embodiments, the length 1 corresponds to the width f of the rotor 2.
  • the axial adjustment of the device 1 is expediently carried out by means of a holding device 45 which supports it and which can be displaced vertically (double arrow 46) in a guide 47 by an actuator (not shown).
  • the actuator can e.g. B. be a pneumatically or hydraulically expandable actuating cylinder.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Coating Apparatus (AREA)
EP86106666A 1985-05-15 1986-05-15 Vorrichtung zum Mischen und Dispergieren mindestens zweier Medien Expired - Lifetime EP0201927B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86106666T ATE82873T1 (de) 1985-05-15 1986-05-15 Vorrichtung zum mischen und dispergieren mindestens zweier medien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853517655 DE3517655A1 (de) 1985-05-15 1985-05-15 Vorrichtung zum mischen und dispergieren mindestens zweier medien
DE3517655 1985-05-15

Publications (3)

Publication Number Publication Date
EP0201927A2 EP0201927A2 (de) 1986-11-20
EP0201927A3 EP0201927A3 (en) 1988-05-18
EP0201927B1 true EP0201927B1 (de) 1992-12-02

Family

ID=6270889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106666A Expired - Lifetime EP0201927B1 (de) 1985-05-15 1986-05-15 Vorrichtung zum Mischen und Dispergieren mindestens zweier Medien

Country Status (4)

Country Link
US (1) US4738543A (enrdf_load_stackoverflow)
EP (1) EP0201927B1 (enrdf_load_stackoverflow)
AT (1) ATE82873T1 (enrdf_load_stackoverflow)
DE (2) DE3517655A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014880A1 (en) * 1989-05-03 1990-12-13 Ullrich, Manfred Mixing device for fluids
DE4118870A1 (de) * 1991-06-07 1992-12-17 Ystral Gmbh Maschinenbau Und P Vorrichtung zum benetzen und dispergieren von pulvern in fluessigkeiten
US6863431B2 (en) * 1992-03-30 2005-03-08 Omni International, Inc. Disruptor device which eliminates cross contamination
RU2162733C1 (ru) * 1999-06-15 2001-02-10 Тамбовский государственный технический университет Реактор-полимеризатор
ES2608057T3 (es) * 2011-11-02 2017-04-05 Fresenius Kabi Deutschland Gmbh Dispositivo y procedimiento para preparar una composición fluida para la nutrición enteral completa o complementaria
CN104853836B (zh) * 2012-12-25 2018-01-12 M技术株式会社 搅拌处理装置和处理方法
EP3332866A4 (en) 2015-08-06 2019-04-17 Meiji Co., Ltd SPRAYING DEVICE AND METHOD FOR PRODUCING A PRODUCT WITH FLUIDITY WITH THE DEVICE
DE102016103968B4 (de) 2016-03-04 2019-01-17 Alexander Westphal Rührer, insbesondere Leitstrahlmischer und Rühreinrichtung umfassend einen Rührer
EP3957393A4 (en) * 2019-04-15 2023-07-19 M. Technique Co., Ltd. STIRRER

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630200A1 (de) * 1975-07-04 1977-01-13 Pilkington Brothers Ltd Verfahren zum herstellen eines glasfaserverstaerkten zementverbundmaterials
DE2702183A1 (de) * 1977-01-20 1978-07-27 Ystral Gmbh Maschinenbau Und P Misch- und dispergiervorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875897A (en) * 1953-06-22 1959-03-03 Booth Lionel Earl Flotation machine
US2985389A (en) * 1955-09-02 1961-05-23 Willems Peter Apparatus for physical and/or chemical treatment of materials
DE1219447B (de) * 1963-11-22 1966-06-23 Karg G M B H Dr Mischkopf zum Homogenisieren u. dgl. von Medien fluessiger bis hochviskoser Konsistenz
US3724765A (en) * 1971-09-03 1973-04-03 Beckman Instruments Inc Tablet disruptor device
DE2310321B1 (de) * 1973-03-01 1974-01-31 Int Laboratoriums App Gmbh Emulgier- und dispergiervorrichtung mit rotierenden konzentrischen werkzeugkraenzen
US4437765A (en) * 1982-03-05 1984-03-20 Ystral Gmbh Dispersion turbine
DE3220092A1 (de) * 1982-05-28 1983-12-01 Janke & Kunkel GmbH & Co KG Ika - Werk, 7813 Staufen Dispergiervorrichtung
GB2165462B (en) * 1984-10-10 1988-02-03 Unishear Mixers Ltd Mixing apparatus stator device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630200A1 (de) * 1975-07-04 1977-01-13 Pilkington Brothers Ltd Verfahren zum herstellen eines glasfaserverstaerkten zementverbundmaterials
DE2702183A1 (de) * 1977-01-20 1978-07-27 Ystral Gmbh Maschinenbau Und P Misch- und dispergiervorrichtung

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Ullmann's Enzyklopädie der Technischen Chemie, 4. Auflage, Bd. 2, Seite 262 *
W. Wittenberger, Chemische Betriebstechnik, 3. Aufl., 1974, S. 243-244, Springer-Verlag *

Also Published As

Publication number Publication date
DE3687183D1 (de) 1993-01-14
DE3517655A1 (de) 1986-11-20
EP0201927A3 (en) 1988-05-18
DE3517655C2 (enrdf_load_stackoverflow) 1987-07-16
US4738543A (en) 1988-04-19
ATE82873T1 (de) 1992-12-15
EP0201927A2 (de) 1986-11-20

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