EP2363200A2 - Mélangeur colloïdal et procédé, notamment pour la préparation de matériaux de construction - Google Patents

Mélangeur colloïdal et procédé, notamment pour la préparation de matériaux de construction Download PDF

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Publication number
EP2363200A2
EP2363200A2 EP10015727A EP10015727A EP2363200A2 EP 2363200 A2 EP2363200 A2 EP 2363200A2 EP 10015727 A EP10015727 A EP 10015727A EP 10015727 A EP10015727 A EP 10015727A EP 2363200 A2 EP2363200 A2 EP 2363200A2
Authority
EP
European Patent Office
Prior art keywords
drive
mixing
dispersing
premixing
mixer according
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
EP10015727A
Other languages
German (de)
English (en)
Other versions
EP2363200A3 (fr
EP2363200B1 (fr
Inventor
Christian Felber
Manfred Kleimeier
Alexander Machaczek
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.)
MAT Mischanlagentechnik GmbH
Original Assignee
MAT Mischanlagentechnik 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 MAT Mischanlagentechnik GmbH filed Critical MAT Mischanlagentechnik GmbH
Publication of EP2363200A2 publication Critical patent/EP2363200A2/fr
Publication of EP2363200A3 publication Critical patent/EP2363200A3/fr
Application granted granted Critical
Publication of EP2363200B1 publication Critical patent/EP2363200B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1124—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades rake-shaped or grid-shaped
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
    • 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
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • 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
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • 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
    • B01F27/91—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with propellers
    • 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
    • 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
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients

Definitions

  • the invention relates to a colloidal mixer, in particular for the treatment of building materials, according to the preamble of claim 1.
  • a colloidal mixer is formed with a mixing trough in which a premixing device and a dispersing device are arranged, and drive means for actuating the premixing device and the dispersing device.
  • the invention further relates to a process for colloidal preparation.
  • each of these known mixer is more or less specifically designed to produce a disperse system with a certain viscosity of predetermined liquid and solid starting materials.
  • the mixing tools mounted in the premixing zone are rotationally connected to the dispersing tools mounted in the dispersing zone and that they are driven by a common drive unit.
  • This has the advantage that a one-sided storage and thus a particularly simply constructed colloidal mixer is possible, which at the same time allows a secure torque transmission between the premixing device and the dispersing device.
  • the storage of the premixing device and the dispersing device on the bottom side of the mixing trough done.
  • the object of the invention is to provide a colloidal mixer and a method in which a particularly good mixing quality can be obtained in a particularly large range of applications.
  • the colloidal mixer according to the invention is characterized in that the premixing device and the dispersing device are rotationally coupled, and that two separate drives are arranged for independently driving premixing device and dispersing device, wherein a drive for the premixing device and a second drive for the dispersing device are provided.
  • a basic idea of the invention can be seen in eliminating the coupling of the mixing tools known from the prior art to the dispersing tools and in each case for the premixing device and the dispersing device to provide a separate drive. Accordingly, according to the invention, the drive means on two separate drives. This makes it possible to provide a speed difference between the premixer and the disperser.
  • the invention is based on the observation that the mixers known from the prior art with premixing device coupled to the dispersing device may reach their limits in certain mixtures, in particular in the mixing of solids-rich suspensions of high density from solids having a very low bulk density . Because of the coupling with the dispersing tools, the mixing tools of the premixing zone run at the same speed as the dispersing tools in such a mixer. However, the speed of the dispersing tools must be sufficiently high to allow the colloidal digestion of the solids. This high speed, which prevails in the prior art due to the coupling in the premixing zone, however, may now lead to undesired effects in the premixing zone, which prevent further solids from low bulk density from being stirred into a substantially higher density suspension ,
  • the inventive arrangement makes it possible, for example, to operate the dispersing device at a high rotational speed, which allows the colloidal digestion to operate at the same time but the premixing device with a comparatively low speed, so that a stirring of solids low bulk density is still possible.
  • the mixer according to the invention can be used for the colloidal preparation of low to high viscosity suspensions and / or dispersions.
  • the premixing device expediently has at least one mixing tool and / or the dispersing device at least one dispersing tool, wherein the at least one mixing tool is rotationally actuated by the first drive, and the at least one dispersing tool is driven by the second drive.
  • the mixing tools in the pre-mixing zone may operate separately from the dispersing tools in the dispersing zone.
  • the rotation of the mixing tool and / or the dispersing tool is expediently carried out around a common axis of rotation, which may be arranged in particular at least approximately vertically and / or in the mixer center.
  • the premixing device and the dispersing device are preferably designed for coaxial rotation of mixing tools and dispersing tools.
  • the premixing device can have two mixing tools, which allows a particularly thorough mixing.
  • the solids are coarsely stirred into the liquid phase in the premixing zone, and that in the subsequent dispersing zone a colloidal digestion of the solids and the ultrafine distribution of the solids in the liquid takes place.
  • the drives can have, for example, electric or hydraulic motors.
  • the power transmission from the motors to the tools is expediently carried out via suitable drive shafts, it also being possible to provide suitable transmissions between the motors and the tools.
  • the drive of the premixing and / or the dispersing device is thus possible either with fixed or variable speed and both hydraulically and by electric motor.
  • the torque transmission can take place either directly via a shaft / hub connection from the respective motor shaft to the premixing device or to the dispersing device and in particular to the respective rotors.
  • the premixing device and / or the dispersing device is in each case designed with its own shaft with bearing and seal, and the torque is transmitted by means of a clutch or belt or chain drive from the respective drive motor to the respective shaft.
  • the premixing device is arranged above the dispersing device.
  • gravity may assist the transport of the medium from the premixer into the disperser.
  • the drive of the premixing device takes place from above, and the drive of the dispersing device from below. Accordingly, it can be advantageous that the drive for the dispersing device is arranged at least partially below the dispersing device, and / or that the drive for the premixing device is arranged at least partially above the premixing device. As a result, a structurally particularly simple design receive.
  • the drive for the premix device can be placed on a lid of the mixer.
  • the drive for the dispersing device can also be located at least partially next to the mixing trough, as a result of which a particularly compact arrangement is obtained.
  • the drive for the premixing device has a hollow shaft, through which a drive shaft of the drive for the dispersing device is performed.
  • the drive shaft for the dispersing tool is designed as a hollow shaft through whose center the shaft is guided for driving the mixing tool.
  • the drive for the premixing device is set up for continuous operation or for intermittent operation of the premixing device, preferably in both directions of rotation. Accordingly, the rotor and / or the at least one mixing tool of the premixing device can be operated continuously or intermittently and in particular in both directions of rotation. This allows a particularly good mixing of a wide range of materials.
  • the premixing device has a mixing rotor.
  • this mixing rotor is operated in rotation by the drive for the premixing device, in particular by a rotation axis extending in the mixer center and / or at least approximately vertically.
  • the at least one mixing tool is arranged on the mixing rotor.
  • a further preferred embodiment of the invention consists in that at least one helical mixing tool, preferably two helical mixing tools, are arranged on the mixing rotor. Accordingly, the mixing tool is formed helically.
  • the at least one helical mixing tool can be wound, for example in the form of a right-hand screw.
  • a helical mixing tool can assist in the circulation and redeployment of the suspension in the mixing trough or assist in emptying the mixer.
  • the at least one helical mixing tool sweeps over a circulation angle between 90 ° and 180 °.
  • the helix covers in the plan view in the direction of the helix axis, which coincides expediently with the axis of rotation of the mixing rotor, an angle between 90 ° and 180 °.
  • the helical mixing tool follows the inner contour of the mixing trough at a small distance. This can result in a cleaning effect, are stripped in the attachment of solids on the trough inner wall and made available to the mixing process.
  • a small distance can be understood as meaning that the radial distance of the mixing tool from the inner contour of the mixing trough, relative to the axis of rotation of the mixing tool, is less than 10 mm, in particular less than 5 mm.
  • the mixing tool can follow the inner contour arcuately at a small distance.
  • the inner contour of the mixing trough may expediently be cylindrical at least in some areas, in particular in the premixing zone, that is to say in the region of the premixing device. As a result, a structurally particularly simple mixer is obtained.
  • the premixing device may have a stirrer mounted rotatably in a stirrer arm.
  • the stirrer may preferably be mounted eccentrically to the mixer center and / or to the rotor axis of rotation. Due to its rotatable mounting in the agitator arm of the stirrer can make a self-rotation around itself, which supports the mixing process particularly well.
  • the Rlickwerksarm is rotatably connected to the mixing rotor of the premixing device.
  • the stirrer can not only perform its own rotation about itself, but it is also rotated together with the mixing rotor to the axis of rotation of the mixing rotor usually located in the mixer center, which still supports the effect of the rotor.
  • means for actively rotating the stirrer are provided around itself.
  • These means for actively rotating the stirrer may be, for example a further motor, for example an electric or hydraulic motor.
  • the means for actively rotating the stirrer have a traction mechanism drive, wherein the traction means, on the one hand, wraps around the stirrer and, on the other hand, a deflecting wheel arranged non-rotatably on the mixing trough.
  • a traction mechanism drive causes the rotation of the Rixiesarms together with the rotor around the rotor axis of rotation also causes an internal rotation of the stirrer around itself.
  • the deflector wheel non-rotatably mounted on the mixing trough can be mounted, for example, on the mixer lid.
  • the traction mechanism can be designed as a chain drive, wherein the traction means is then formed as a chain.
  • a further advantageous embodiment of the invention consists in that the stirrer has at least one replaceable stirring tool. Accordingly, the stirrer is formed with a changing device for different, adapted to the particular application stirring.
  • the rotor of the premixing device has a rotor shaft on which radially projecting arms are arranged. On these arms, on the one hand, the mixing tools and on the other the bearing of the stirrer can be attached.
  • the invention also relates to a process for the colloidal preparation of a mixture, in which the mixture is introduced into a colloidal mixer according to the invention and is processed to a dispersion.
  • a first embodiment of a mixer according to the invention is shown in side view in Fig. 1 shown.
  • the mixer shown has a mixing trough 10, in which a premixing zone 11 and below a dispersing zone 12 are formed.
  • a premixing device 20 is provided for mixing solid, and in the dispersing zone 12 a dispersing device 30 for colloidal digestion.
  • the mixing trough 10 is approximately cylindrical on both the inside and the outside, with a larger diameter of the mixing trough 10 being present in the upper premixing zone 11 than in the lower dispersing zone 12
  • the mixing trough 10 On its upper side, the mixing trough 10 has a mixer lid 18, in which feed openings 19 are formed for feeding the starting materials to be mixed.
  • the mixing trough 10 on the shell side has an outlet opening 16 for discharging the thoroughly mixed product, to which a discharge hose is arranged in the illustrated embodiment.
  • the premixing device 20 has a mixing rotor 21 with two mixing tools 23, 23 ', which is mounted rotatably about a rotation axis 80 on the mixing trough 10.
  • the storage is given at the top of the mixing trough 10 and / or on the mixer cover 18.
  • the mixing rotor 21 has a rotor shaft 24 extending vertically and coaxially to the axis of rotation 80. From this rotor shaft 24 are in the radial direction arms 25 out, on which in turn the mixing tools 23, 23 'are arranged.
  • the mixing tools 23, 23 ' may for example be wound in the form of a right-hand screw. Runs then the mixing rotor 21 seen from above in a clockwise direction, support shape and rotation of the mixing tools 23, 23 'the circulation and redeployment of the suspension in the mixing trough 10. A reversal of rotation on the rotor causes in this case support the emptying of the mixer, since then the helical mixing tools 23, 23 'have a conveying action in the direction of the dispersing zone 12 and the outlet opening 16 attached here. At the in Fig. 1 illustrated embodiment, however, a left-hand screw of the mixing tools 23, 23 'given, so that the functionality with respect to the direction of rotation is inverse.
  • the dispersing device 30 has a dispersing rotor 31 with dispersing tools 33.
  • the dispersing tools 33 are designed in the form of plates which extend perpendicularly and radially to the axis of rotation 80.
  • the dispersing rotor 31 is also rotatably mounted about the axis of rotation 80, wherein the storage of the dispersing rotor 31 is provided on the underside of the mixing trough 10.
  • a first drive 40 is provided, which is arranged above the mixing trough 10.
  • a second drive 50 is provided, which extends partially below the mixing trough 10, and partially laterally next to the mixing trough 10. Since thus the premixing device 20 and the dispersing device 30 have separate drives 40 and 50, the mixing rotor 21 and the dispersing rotor 31 can be operated at different speeds.
  • the first drive 40 has a first motor 41, which is arranged above the mixing trough 10 in the extension of the rotation axis 80.
  • the drive shaft of the motor 41 not shown for the sake of clarity, runs coaxially with the axis of rotation 80 from the motor 41 to the mixing rotor 21, wherein the mixing rotor 21 is mounted on the front end of the drive shaft of the motor 41.
  • the drive shaft of the first motor 41 is surrounded by a protective tube 49 which extends between the mixing trough 10, namely its mixer cover 18, and the motor 41, and which carries the motor 41.
  • the motor 41 is thus, preferably via the protective tube 49, mounted on the mixer cover 18.
  • the second drive 50 for the dispersing device 30 has a second motor 51.
  • the drive shaft 52 of the motor 51 is offset from the axis of rotation 80 of the dispersing rotor 31. This offset is made possible by a traction drive 54, which transmits the torque from the motor 51 to the offset dispersing rotor 31.
  • the traction mechanism 54 is formed as a belt drive. The traction mechanism drive 54 allows the second motor 51 laterally offset next to provide the mixing trough 10, which allows a particularly space-saving design.
  • the first drive 40 and / or the second drive 50 are preferably designed such that the premixing device 20 or the dispersing device 30 can be operated in both directions of rotation.
  • FIG. 2 Another embodiment of a mixer according to the invention is in Fig. 2 shown.
  • the embodiment of Fig. 2 differs from the embodiment of Fig. 1 essentially in that according to Fig. 2 the premixer 20 has an additional stirrer 60.
  • the remaining elements of the embodiment of the Fig. 2 are essentially identical to the embodiment of the Fig. 1 trained so that these elements will not be discussed again in detail at this point.
  • the agitator 60 is shown together with the helical mixing tools 23, 23 '.
  • the agitator 60 can be used in mixers which do not have helical mixing tools 23, 23 ', just as helical mixing tools 23, 23' can also be realized without agitator 60.
  • the stirrer 60 is arranged eccentrically to the mixer center and to the rotation axis 80. It is mounted on a Rrockwerksarm 26 which is rotatably connected to the rotor shaft 24 of the mixing rotor 21 and extending from the rotor shaft 24 radially outward. Since the agitator arm 26 and consequently also the agitator 60 are thus connected in a rotationally fixed manner to the mixing rotor 21, the first drive 40 also causes the agitator arm 26 and the agitator 60 to rotate. During this rotation, the agitator 60 rotates around the axis of rotation 80.
  • the agitator 60 can be equipped with different agitating tools 61 adapted to the respective application, wherein a U-shaped agitating tool 61 is provided in the illustrated embodiment.
  • the agitator 60 without active drive, that is to say the agitating tool 61 is freely rotatable about itself.
  • the agitator arm 26 with the stirrer 60 about the axis of rotation 80 may already be sufficient for a correspondingly formed stirrer 60 to a Rotation of the stirring tool 61 to induce itself. This rotation about itself can effectively assist in the incorporation of additional solids in highly viscous suspensions.
  • an active drive of the agitator 60 in which means are provided for actively rotating the agitator 60 around itself.
  • These means for actively rotating the agitator 60 around itself may comprise, for example, a stand-alone motor.
  • the active drive is formed by a traction mechanism, which is a particularly simple design.
  • the traction mechanism drive has a first deflection wheel 68 which is non-rotatably arranged on the mixing trough 10, namely its mixer cover 18, and a second deflection wheel 69, which is non-rotatably connected to the stirrer 60, in particular to the stirring tool 61.
  • the two deflection wheels 68, 69 are both looped by a traction means 67, so that rotation of the mixing rotor 21 and thus of the agitator arm 26 about the axis of rotation 80 causes the agitating tool 61 to rotate about itself.
  • the said traction mechanism drive is formed in the illustrated embodiment as a chain drive, that is, in the two deflecting wheels 68, 69 are sprockets and the traction means 67 to a chain.
  • the first guide wheel 68 which is arranged on the mixing trough 10, be designed as a large wheel, and the second guide wheel 68 as a small wheel, so that a speed ratio is given to the agitator 60 out.
  • the speed of the stirrer 60 in relation to the speed of the mixing rotor 21 can be influenced by the choice of the translation of the traction mechanism.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP10015727.0A 2010-03-03 2010-12-16 Mélangeur colloïdal et procédé, notamment pour la préparation de matériaux de construction Active EP2363200B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010003100U DE202010003100U1 (de) 2010-03-03 2010-03-03 Kolloidalmischer, insbesondere zur Aufbereitung von Baustoffen

Publications (3)

Publication Number Publication Date
EP2363200A2 true EP2363200A2 (fr) 2011-09-07
EP2363200A3 EP2363200A3 (fr) 2013-05-01
EP2363200B1 EP2363200B1 (fr) 2016-09-28

Family

ID=42169275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10015727.0A Active EP2363200B1 (fr) 2010-03-03 2010-12-16 Mélangeur colloïdal et procédé, notamment pour la préparation de matériaux de construction

Country Status (2)

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EP (1) EP2363200B1 (fr)
DE (1) DE202010003100U1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102014008067A1 (de) * 2014-05-27 2015-12-03 Ammann Elba Beton GmbH Vorrichtung zum Mischen von Beton

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DE102011104272B4 (de) * 2011-06-15 2014-07-03 EKATO Rühr- und Mischtechnik GmbH Anlage zur Dispersion von feindispersen Feststoffen in hochviskose Produkte
EP3229947A1 (fr) * 2014-12-08 2017-10-18 Tetra Laval Holdings & Finance SA Appareils et procédés permettant un mélange amélioré
DE102015102261A1 (de) * 2015-02-18 2016-08-18 Netzsch Feinmahltechnik Gmbh Mischvorrichtung und Verfahren zum Zerkleinern von groben Bestandteilen beim Ausleiten eines Produktgemisches aus einer Mischvorrichtung
DE202016000169U1 (de) * 2016-01-14 2017-04-20 Symex Gmbh & Co. Kg Pump- und/oder Mischeinrichtung zum Fördern, Homogenisieren und/oder Dispergieren fließfähiger Produkte
AT518345B1 (de) 2016-02-15 2019-12-15 Dipl Ing Franz Goetschl Verfahren zur Herstellung eines Betonbaustoffes
CN114288934B (zh) * 2022-01-21 2023-03-28 临沂市金沂蒙生物科技有限公司 一种新型木薯糟液厌氧处理设备
EP4357013A1 (fr) 2022-10-20 2024-04-24 BAUER MAT Slurry Handling Systems Zweigniederlassung der BAUER Maschinen GmbH Procédé et mélangeur colloïdal pour la préparation colloïdale d'une suspension

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014008067A1 (de) * 2014-05-27 2015-12-03 Ammann Elba Beton GmbH Vorrichtung zum Mischen von Beton

Also Published As

Publication number Publication date
EP2363200A3 (fr) 2013-05-01
DE202010003100U1 (de) 2010-05-12
EP2363200B1 (fr) 2016-09-28

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