Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/40—Mixing liquids with liquids; Emulsifying
• • 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
  • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F29/00—Mixers with rotating receptacles
• • 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
  • B01F33/25—Mixers with loose mixing elements, e.g. loose balls in a receptacle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
  • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
  • B01F2025/91—Direction of flow or arrangement of feed and discharge openings

Definitions

• the process according to the invention essentially consists in introducing the dispersion or emulsion to be homogenized into a rotating grinding chamber which is at least partially filled with grinding media and delimited by at least two rotatable wall elements, and in that the dispersion to be homogenized or emulsion transverse to the axis (s) of rotation of the wall elements through the Annulus is moved or passed through. Because the dispersion or emulsion to be homogenized is introduced into a rotating grinding chamber which is at least partially filled with grinding media and delimited by at least two rotatable wall elements, a mixing zone is formed between the rotating wall elements, which overall has a relatively large partial area with small dimensions an intensive mixing guaranteed.
• the partial area of intensive mixing between the rotating partial areas of the grinding chamber or mixing chamber is formed by an annular surface which is essentially normal to the axes of rotation.
• the division plane and thus the zone of the most intensive mixing can also lie in a surface which corresponds to the lateral surface of a cone.
• the mixing or swirling depends on the relative speed that exists between adjacent areas of the mixing space or grinding space. If the wall surfaces rotate in opposite directions, this relative speed and thus the dispersing action become particularly high, although overall attention should also be paid to a resulting centrifugal force in the grinding chamber in order to separate the grinding media.
• the method can therefore advantageously be carried out in such a way that the mixing operation is carried out between wall elements rotating relative to one another at different speeds and / or directions of rotation.
• a good separation of the grinding media from the dispersed or homogenized mixture without complex separation technology can be achieved in that the dispersion or emulsion to be homogenized is conveyed through the grinding chamber counter to the direction of movement of the grinding media caused by the centrifugal force.
• Intensive mixing in which a shear stress can optionally be dispensed with, can be achieved with a design of the device in which the axes of rotation of the wall elements are arranged inclined relative to one another and adjoin one another including an obtuse angle. If such a device is operated with the same speed and the same direction of rotation of the wall elements, in particular disks, the relative movement of the wall elements is reduced to a cyclical crushing, which creates a flexing effect, which naturally can also be superimposed on shear stress at interfaces. if differences in speed or direction of rotation are permitted.
• the design is preferably such that the angle between the axes of rotation of the wall elements is infinitely adjustable.
• the device for dispersing, mixing or homogenizing solid / liquid or liquid / liquid mixtures consists of a housing, generally designated 1, in which a first wall element 2 in the form of a half-shell can be rotated about an axis of rotation 3 by a not shown provided drive is stored.
• the shell-shaped wall element 2 defines, with a second, also rotatably mounted, shell-shaped wall element 4, a grinding chamber 5 designed as an annular space, the grinding chamber being indicated by dashed lines in the second half of the drawing by 5 'to illustrate the symmetrical design.
• the second wall element 4 is also driven to rotate about the axis 3 by a drive, not shown. Storage for the wall element 4 in the housing 1 is indicated by 6. With the first rotating wall element 2 is the outside of the second wall element
• the two shell-shaped wall elements 2 and 4 delimiting the grinding chamber 5 rotate about the common axis 3 at different speeds and / or different directions of rotation.
• Via a feed line or a connection 11 the material to be mixed or the solid / liquid and / or liquid / liquid mixtures enters the gap 12 between the outer wall 13 of the second wall element 4 and the inner wall 14 of the part connected to the first wall element 2 7, wherein in this gap 12 a strong shear stress of the introduced material is caused by the elements 4 and 7 rotating at different speeds and / or different directions of rotation.
• the material then passes through a slot or a feed opening 15 into the grinding chamber or annular space 5, in which up to 75% by volume of grinding media, not shown, with an effective diameter of less than 0.5 mm are arranged, around which To disperse, mix or homogenize the supplied materials.
• the supplied material is exposed to shear and mixing stresses in that the two wall elements 2 and 4 delimiting or defining the grinding chamber are driven at different speeds and / or different directions of rotation, resulting in a mixing surface which in the is essentially formed by a circular area.
• the correspondingly mixed or homogenized material is drawn off via a gap 16 facing the axis of rotation 3 between the rotating wall elements and applied via an axial channel 17.
• Throttling devices are provided in the axial channel 17 for regulating or controlling the flow in order to achieve a desired result.
• the function of the inlet and outlet openings 15 and 16 can be inverted if the parameters are appropriately selected during mixing or homogenization .
• a shell-shaped wall element 2 is in turn about an axis of rotation 3 by a Drive (not shown in more detail) is driven to a rotary movement.
• a Drive (not shown in more detail) is driven to a rotary movement.
• the wall element 2 in turn, a part 7 overlapping the second wall element 4 is connected in a rotationally fixed manner, only the bearings 10 being indicated.
• the second shell-shaped wall element has a rotation axis 18 which is different from the axis of rotation 3 of the first wall element 2 and which forms an obtuse angle with the axis of rotation 3.
• MahlSystemchen be fugalkraft by Zentri ⁇ turn in the rota ' tion axes 3 or. 18 distant areas of the grinding chamber 5 moves, the cross-sectional area tapering to different extents again in turn immediately upon entry of the material to be mixed or. to homogenize material in the grinding chamber 5, there is a particularly heavy load by the grinding media 19.
• the angle between the axes of rotation 3 and 18 can be infinitely adjustable up to a maximum value, starting from a position of the axes 3 and 18 in alignment with one another.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Mixers Of The Rotary Stirring Type (AREA)
• Crushing And Grinding (AREA)
• Paints Or Removers (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3536209

Family Applications (1)

Country Status (9)

Cited By (1)

Citations (2)

• 1992
  • 1992-12-21 DE DE59207190T patent/DE59207190D1/de not_active Expired - Fee Related
  • 1992-12-21 WO PCT/AT1992/000172 patent/WO1993012871A1/de active IP Right Grant
  • 1992-12-21 DK DK93900118.6T patent/DK0572610T3/da active
  • 1992-12-21 JP JP5511303A patent/JPH06505437A/ja active Pending
  • 1992-12-21 EP EP93900118A patent/EP0572610B1/de not_active Expired - Lifetime
  • 1992-12-21 AT AT93900118T patent/ATE142902T1/de not_active IP Right Cessation
  • 1992-12-21 KR KR1019930702489A patent/KR930703064A/ko not_active Application Discontinuation
  • 1992-12-21 ES ES93900118T patent/ES2094520T3/es not_active Expired - Lifetime
  • 1992-12-21 CA CA002104388A patent/CA2104388A1/en not_active Abandoned

Patent Citations (2)

Non-Patent Citations (1)

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