EP2052772A1 - Dissolver - Google Patents

Abstract

The dissolver (1) has a mixing tank (2) in which a mixture (3) is provided, and a holder (12) that is arranged in the tank and rotates relative to the tank at a rotation axis (11). Multiple shearing tools (14) are arranged on and extend away from an upper surface (13) of the holder. A drive (10) i.e. electric motor, rotates the holder at the rotation axis. The shearing tools are formed as cups that are open to a side turned away from the upper surface of the holder. Outer surface area of each tool is embedded at the upper surface of the holder to form a gap (19).

Description

The invention relates to a dissolver with a mixing container, in which a mixture is introduced or introduced, at least one disposed in the mixing container and rotatable relative to this about a rotation axis holder, a plurality, arranged on a surface of the holder and extending away from the surface shearing tools, and a drive by means of which the holder is or can be rotated about the axis of rotation.

From the US 2003/0233937 A1 is a mixer with a mixing container and stirring discs arranged therein, which are rotationally driven by means of a motor arranged outside of the mixing container with the interposition of a shaft. The mixing container receives a mix and has an inlet in its wall surrounding the stirring disk and an outlet for the mix in its bottom. Further, a solid may be introduced into the mixing vessel via a solids inlet arranged concentrically around the shaft and equipped with a screw conveyor. The stirrer disks are arranged offset from one another in the axial direction and each have a plurality of shearing tools which extend axially away from the respective stirrer disk. At least one of the stirring discs has a high-shear design.

In order to achieve a good recirculation of the mix, the stirrers must rotate relatively quickly, which leads to a heating of the mix. This effect can certainly be beneficial, but has the disadvantage for some foods that too much warming will affect the taste negatively. Furthermore, a high favors Rotation speed of the stirring discs an undesirable bubble formation within the mix.

Based on this prior art, the invention has the object, a dissolver of the type mentioned in such a way that a good recirculation can be achieved even in the lower shear range.

This object is achieved with a dissolver according to claim 1. Preferred developments are given in the dependent claims.

The dissolver according to the invention has a mixing container, into which a mixture is introduced or introduced, at least one arranged in the mixing container and rotatable relative to this about a rotation axis holder, a plurality, arranged on a surface of the holder and away from the surface extending shear tools, and a Drive on, by means of which the holder is rotated about the axis of rotation or can be, wherein the shearing tools are designed as open on or to a side facing away from the surface side shells whose outer surfaces with the surface include gaps.

The inventive design of the cutting tools, it is possible to break up particles present in the mix on the columns. Furthermore, the open shells lead to a good recirculation at relatively low rotational speeds of the holder. As a result, overheating of the mix and blistering can be avoided despite good mixing results. In particular, the dissolver according to the invention may be used to disperse and / or homogenize foods, e.g. of mayonnaise, to be used. Since blistering is avoided or at least largely avoided, it is also possible to use the dissolver according to the invention for the production of paints, paper, etc.

The holder may have any shape and be formed, for example, as a wheel or as another body. Preferably, however, the holder comprises and / or forms one or more at least one disc, in particular a stirring disc. Furthermore, the holder is preferably circular. Finally, the holder may have a certain thickness, so that it has, for example, the shape of a short cylinder.

Preferably, a single holder is arranged in the mixing container, resulting in a particularly space-saving design of the dissolver. Alternatively, however, a plurality of holders and / or stirring discs, in particular at a distance from one another, may be arranged in the mixing container.

The speed of rotation of the holder is e.g. 300 to 400 revolutions per minute. But there are also higher speeds of e.g. 1000 to 1500 revolutions per minute possible. Basically, the speed of the bracket but adapted to the specific application.

The surface of the holder is preferably formed, at least in the region of the shells, flat or substantially planar. In particular, the surface comprises at least one or more surface areas in which or in which the trays are arranged, which include the gaps with the surface area (s). In this case, the surface preferably comprises or forms one or at least one pane surface, which in particular forms the or one of the surface regions. The surface areas are preferably flat or substantially planar. Further, the or some of the surface areas may form one or more contiguous areas. Additionally or alternatively, the or some of the surface areas at a distance from each other. The holder may have one or more plates. In this case, the or some of the surface areas may be formed, for example, by surfaces of the plates (plate surfaces). If the holder comprises, in addition to the plates, one or at least one disk, the plates together with the cups are arranged in particular at a distance from the disk. Thus, the holder comprises, for example, a disc and at a distance to this arranged plates, on whose surfaces the shells are arranged.

According to one embodiment of the invention, the shearing tools or a part thereof are arranged in opposite surface regions of the holder. As a result, the effectiveness of the inventive dissolver is increased. In particular, a larger Mischgutvoloumen can be processed in one operation. The opposing surface regions of the holder are preferably disk surfaces and / or plate surfaces.

The shells are preferably identical or substantially similar. Alternatively, it is possible that the trays are e.g. differ in their shape and / or size.

The gaps are in particular wedge-shaped or substantially wedge-shaped and / or taper in particular with increasing gap depth, so that both larger and smaller particles can be broken up at the gaps. Smaller particles may e.g. penetrate deeper into the column as larger particles, so that for almost all relevant particle sizes, a suitable gap for breaking up the particles is available. Preferably, the outer surfaces of the shells are curved outward or convex. This makes it possible in a simple manner, the wedge-shaped or substantially wedge-shaped formation of the column.

According to one embodiment of the invention, the inner surfaces of the shells are curved inward or concave. This concave configuration favors the recirculation of the mix, especially in vertical form. The inner surface of at least one or each shell preferably has regions of different curvature. This makes it possible to further improve the recirculation. In particular, the mixture can penetrate in the region of low curvature in the interior of the or the respective shell and be pushed out by the more curved portion of the interior again. Along a circle concentric with the axis of rotation and / or along a tangent adjacent thereto, the differently curved regions of the respective shell or shell are preferably arranged one behind the other, as seen in the direction of rotation of the holder, in particular the less curved region the more curved portion of the or each shell lies. Furthermore, a circumferential contour that surrounds the opening of at least one or each of the shells is preferably elongated and / or oval, with the greatest longitudinal extent of the circumferential contour extending in particular along the circle and / or along the tangent.

The shells preferably extend away from the holder in the direction of the axis of rotation or substantially in the direction of the axis of rotation. In particular, at least three of the shells are arranged along a circular path concentric with the axis of rotation. But there are other arrangements of the shells possible. The shells preferably have a distance from one another. In particular, the trays are attached to the holder, this attachment being insoluble, e.g. by welding, or releasably, e.g. can be done by screws or screw. Furthermore, combinations of welded and screwed or other forms of connection are possible.

The shells are preferably designed as partial shells, in particular as half shells, and may be e.g. the shape of a plate, a bowl, a spoon (without stem) etc. have. In particular, each shell has a hollow interior accessible via its opening. Furthermore, the openings of the shells can run parallel to the surface or to the respective surface region of the holder or be inclined relative to this surface / surface region. It is also possible that the shells are inclined relative to the surface or the respective surface region of the holder.

According to one embodiment of the invention sit, especially at a distance, on the shells additional shells. These may be open to a side facing away from the bracket and / or facing. In this case, the shells arranged one above the other form in each case a group of shearing tools (stack arrangement) whose longitudinal direction preferably extends in the direction of the axis of rotation or substantially in the direction of the axis of rotation. Between two adjacent shells of each shearing tool group, in particular, a plate is arranged, which is connected to the outer surface of one or at least one of adjacent shells, preferably with the outer surface of the shell further removed from the holder, includes a gap. In this case, the plate, for example, sit outside or inside the interior of the other of the adjacent shells. With the stacking arrangement, it is possible to arrange a plurality of columns one above the other, whereby the shearing action of the holder is increased. The shells of each pair of shearing tools are preferably identical or substantially similar. In particular, the superposed shear tools each shear tool group, preferably also their plate or plates, for example by means of screws and / or welding, with each other and / or fixedly connected to the holder. The stacked shells of each shearing tool group may all be open on the same side. Alternatively, it is possible for the stacked shells of each shearing tool group to be open alternately to different sides, in particular to opposite sides.

The shells can be arranged along several concentric circles of different diameter relative to the axis of rotation. As a result, circular shearing tool arrangements of different diameters are formed, wherein two adjacent ones of the shearing tool arrangements are preferably rotated around the axis of rotation relative to one another by an angle.

The drive is e.g. designed as an electric motor and in particular connected to the stirred tank.

The mix preferably has a liquid and a solid introduced into it, which usually has a plurality of solid particles. Alternatively, the mix may also consist of several liquids. In this case, each solid and / or each liquid can only consist of one constituent or be composed of different constituents and form, for example, a mixture. Examples of a mix are eg edible oil and egg or egg powder (for mayonnaise production), water and bread or bread crumbs (for remainder bread return), dye particles and solvents (for the production of paints and varnishes) cellulose fibers and water (for papermaking) etc ..

When turning the holder alternating pressures are generated, which contribute in particular to particle size reduction and / or homogenization of the mix. The shell-like construction of the shearing tools leads to an additional acceleration of the mixed material, preferably in the vertical direction, and thus to a good recirculation. In particular, a more effective comminution and / or homogenization of the mixed material can be achieved than with conventional dissolvers of comparable size. Furthermore, the dissolver according to the invention can be designed to be more energy-saving than conventional dissolvers because of its good mixing properties in the lower speed range of the holder. Finally, it is possible with the dissolver according to the invention to reduce a hitherto two-stage process to a single stage.

The dissolver according to the invention is used in particular for dispersing and / or homogenizing foodstuffs. Thus, e.g. as an emulsion, an emulsion of egg and oil are used for the production of mayonnaise, wherein the egg is present in particular in powder form. Furthermore, the dissolver according to the invention can be used for residual bread recycling. In the process, the remaining bread is comminuted, the comminuted bread forming the mix together with water. Finally, it is possible to use the dissolver according to the invention for the production of paper, paints and varnishes. To use adhesives and pharmaceutical products. The aforementioned uses are to be understood as exemplary and in particular not restrictive, so that the dissolver according to the invention can also be used for other applications.

Fig. 1

eine Schnittansicht eines Dissolvers gemäß einer ersten Ausführungsform der Erfindung,

Fig. 2

eine Draufsicht auf die Halterung nach Fig. 1,

Fig. 3

eine Schnittansicht durch ein Scherwerkzeug entlang der Schnittlinie A-A aus Fig. 2,

Fig. 4

eine Schnittansicht durch ein Scherwerkzeug entlang der Schnittlinie B-B aus Fig. 2,

Fig. 5

eine Schnittansicht einer Halterung gemäß einer zweiten Ausführungsform der Erfindung,

Fig. 6

eine teilweise Schnittdarstellung einer Halterung gemäß einer dritten Ausführungsform der Erfindung,

Fig. 7

eine Draufsicht auf eine Halterung gemäß einer vierten Ausführungsform der Erfindung,

Fig.

8 eine Schnittansicht eines Dissolvers gemäß einer fünften Ausführungsform der Erfindung,

Fig. 9

eine teilweise Schnittdarstellung einer Halterung gemäß einer sechsten Ausführungsform der Erfindung und

Fig. 10

eine teilweise Schnittdarstellung einer Halterung gemäß einer siebten Ausführungsform der Erfindung.

The invention will be described below with reference to preferred embodiments with reference to the drawing. In the drawing show:

Fig. 1

a sectional view of a dissolver according to a first embodiment of the invention,

Fig. 2

a top view of the bracket after Fig. 1 .

Fig. 3

a sectional view through a cutting tool along the section line AA Fig. 2 .

Fig. 4

a sectional view through a cutting tool along the section line BB Fig. 2 .

Fig. 5

a sectional view of a holder according to a second embodiment of the invention,

Fig. 6

a partial sectional view of a holder according to a third embodiment of the invention,

Fig. 7

a top view of a holder according to a fourth embodiment of the invention,

FIG.

8 is a sectional view of a dissolver according to a fifth embodiment of the invention,

Fig. 9

a partial sectional view of a holder according to a sixth embodiment of the invention and

Fig. 10

a partial sectional view of a holder according to a seventh embodiment of the invention.

Out Fig. 1 is a sectional view of a dissolver 1 according to a first embodiment of the invention can be seen, wherein in a mixing container 2 a mix 3 is introduced. The mix 3 has a surface 4 and can be discharged through a provided in the wall 5 of the mixing container 2 outlet 6, which is closable. Further For example, the mixture 3 or at least one component thereof may be introduced into the mixing container 2 through an inlet 8 extending through a cover 7 of the mixing container 2. By the preferably removable cover 7 further extends a shaft 9 therethrough, which can be rotated about an axis of rotation 11 relative to the mixing container 2 with a arranged outside of the mixing container 2 drive 10 (eg electric motor). The shaft 9 is rotatably connected to a holder 12 designed as a stirring disc, wherein on the surface 13 of the stirring disc 12 a plurality of cutting tools 14 are arranged and fixed by welding to the stirring disk 12. The shearing tools 14 are constructed in particular identical and cup-shaped. Furthermore, the shearing tools 14 are open towards a side facing away from the stirring disk 12. The disk surface 13 forms a surface area of the holder 12.

Out Fig. 2 is a plan view of the stirring disc 12 can be seen, it can be seen that the openings 15 of the shells 14 surrounding peripheral contours 16 are formed oval. Furthermore, the shells 14 are spaced apart along a circle 17 on the surface 13 of the stirring disc 12, which is also circular.

Out Fig. 3 is a sectional view through one of the shells 14 along the section line AA Fig. 2 can be seen, wherein the outer surface 18 of the shell 14 is convex and with the disc surface 13 includes a gap 19. The gap 19 is substantially wedge-shaped and tapers with decreasing distance from the FIG. 2 apparent section line BB. The section line AA runs here tangentially to the circle 17, whereas the section line BB runs radially and thus perpendicular to the section line AA. Furthermore, the direction of rotation of the stirring disc 12 is indicated by the arrow 20. The inner surface 21 of the shell 14 is concave and has a portion 22 and a portion 23 which is curved more than the portion 22. When the stirring disk is rotated, the mixed material enters the interior 24 of the shell 14 in the region 22 and is forced out of the shell 14 through the opening 15 thereof in the region 23. A schematic representation of the flow of the mixed material is illustrated by the dashed line 36 with arrows. Thus, a circulation or

Recirculation of the mix 3 caused, which is illustrated by the dashed line 37 with arrows (see Fig. 1 ). Out Fig. 4 is a sectional view of the shell 14 along the section line BB Fig. 2 can be seen, in which section the curvature of the inner surface 21 is constant. Except for the opening 15, the shell is closed, which has approximately the shape of a spoon without a handle.

Out Fig. 5 is a sectional view through a formed as a stirring disc holder 12 according to a second embodiment of the invention can be seen, wherein identical or similar features to the first embodiment are denoted by the same reference numerals as in the first embodiment. In contrast to the first embodiment, shell-shaped shearing tools 14 are arranged on the opposite surface 25 of the stirring disk 12 and fixed by welding. The disk surface 25 forms a surface region of the holder 12. Furthermore, the stirrer disk 12 has a web 43 at the edge, which can however also be omitted. Otherwise, this stirring disk 12 is formed corresponding to the stirring disk according to the first embodiment and can replace it. The web 43 may also be provided in the other embodiments.

Out Fig. 6 is a partial sectional view of a formed as a stirring disc holder 12 according to a third embodiment of the invention can be seen, wherein identical or similar features to the first embodiment are denoted by the same reference numerals as in the first embodiment. On the shearing tools 14 are additional shearing tools 26, which are at a distance from one another and from the shearing tools 14, so that the superposed shearing tools 14, 26 together form a shearing tool group (stack arrangement) 30. In this case, the superposed shear tools 14, 26 extend each shearing tool group 30 along a straight line (eg straight line 38) which runs parallel to the axis of rotation 11. Between two successive shearing tools 14, 26 or 26, 26, a plate 27 is in each case arranged, which forms a gap 28 with the overlying shearing tool 26. The additional shearing tools 26 are constructed to be similar or substantially similar to the shearing tools 14. Furthermore, the superimposed shear tools 14, 26 each shear tool group 30 by means of a screw 29 with each other and with the stirring disc 12 is firmly connected. The stirring disk according to the third embodiment may replace the stirring disk according to the first embodiment.

Out Fig. 7 is a plan view of a formed as a stirring disc holder 12 according to a fourth embodiment of the invention can be seen, wherein identical or similar features to the first embodiment are denoted by the same reference numerals as in the first embodiment. In contrast to the first embodiment, this stirrer disk 12 has additional shearing tools 31, which are designed in accordance with the shearing tools 14 but are arranged on a circle 32 of larger diameter, so that the additional shearing tools 31 have a greater distance from the axis of rotation 11 than the shearing tools 14. Further, the circular arrangement of the additional cutting tools 31 is rotated relative to the circular arrangement of the cutting tools 14 about the axis of rotation 11 by an angle α. It is possible to provide further cutting tools 33 which extend along a circle 34. However, this is only optional, which is why the other cutting tools 33 are shown in dashed lines. The stirring disk according to the fourth embodiment may replace the stirring disk according to the first embodiment.

Out Fig. 8 is a sectional view through a dissolver 1 according to a fifth embodiment of the invention can be seen, wherein the previous embodiments identical or similar features with the same reference numerals as in the previous embodiments are designated. In contrast to the first embodiment, the shearing tools 14 are not welded to the support 12 formed as a stirring disc but attached by means of screws 29 to the stirrer disk 12. Furthermore, the dissolver 1 according to the fifth embodiment is designed for continuous operation, so that the interior 35 of the mixing container 2 is in particular completely filled with the mix 3. Finally, the outlet 6 is provided in the bottom 39 of the mixing container 2. For further description of the fifth embodiment, reference is made to the description of the first embodiment. Further, it is possible, the stirring disc 12 according to the fifth Use embodiment in the first embodiment and vice versa. Also, the stirring disc according to the fifth embodiment may be replaced by one of the stirring discs according to the other embodiments.

Out Fig. 9 is a partial sectional view of a formed as a stirring disc holder 12 according to a sixth embodiment of the invention can be seen, to the previous embodiments identical or similar features are denoted by the same reference numerals as in the previous embodiments. The sixth embodiment is similar to the third embodiment. In contrast to this, however, one of the additional shells 26 of each shearing tool group 30 is open towards a side facing the stirring disk 12 (here the middle shank of each shearing tool group 30). As a result, a plate 27 per shear tool group 30 is saved. For further description of the sixth embodiment, reference is made to the description of the third embodiment. The stirring disk according to the sixth embodiment may replace the stirring disk according to the first and / or the fifth embodiment.

Out Fig. 10 is a partial sectional view of a stirring disc 42 comprising a holder 12 according to a seventh embodiment of the invention can be seen, wherein, apart from the stirring disc, to the fifth embodiment, identical or similar features are denoted by the same reference numerals as in the fifth embodiment. The seventh embodiment is similar to the fifth embodiment, but in contrast to this, the shells 14 are arranged at a distance from the surface 13 of the stirring disk 42. Further, the bracket 12 has plates 40 which provide for each of the shells 14 a surface portion 41 which includes a gap 19 with the outer surface 18 of the respective shell 14. In this case, the plates 40 are attributed to the holder 12, so that the surface regions 41 form part of the surface of the holder 12. Further, the screws 29, by means of which the plates 40 and the shells 14 are attached to the stirrer disk 42, attributed to the holder 12. For further description of the seventh embodiment, reference is made to the description of the fifth embodiment. The stirring disk according to the seventh embodiment may replace the stirring disk according to the first and / or fifth embodiments.

LIST OF REFERENCE NUMBERS

1

dissolver

2

mixing tank

3

mix

4

Surface of the mix

5

Wall of the mixing tank

6

outlet

7

Cover of the mixing container

8th

inlet

9

wave

10

drive

11

axis of rotation

12

Holder / stirrer disc

13

Surface of the stirring disc

14

Shearing tool / shell

15

Opening of the shell

16

peripheral contour

17

circle

18

Outer surface of the shell

19

gap

20

Direction of rotation of the holder / stirrer disc

21

Inner surface of the shell

22

Area of the inner surface

23

Area of the inner surface

24

Interior of the shell

25

Surface of the stirring disc

26

additional shearing tool

27

plate

28

gap

29

screw

30

Shear tool group

31

additional shearing tools

32

circle

33

other shearing tools

34

circle

35

Interior of the mixing tank

36

Flow of the mix

37

Recirculation / flow of the mix

38

Straight, parallel to the axis of rotation

39

Bottom of the mixing container

40

plate

41

surface area

42

stirring disc

43

web

Claims (12)

Dissolver with a mixing container (2), in which a mix (3) is introduced or introduced, at least one in the mixing container (2) arranged and relative to this about a rotation axis (11) rotatable holder (12), a plurality, on a surface (13) shearing tools (14) arranged on the holder (12) and extending away from the surface (13), a drive (10) by means of which the holder (12) is or can be rotated about the axis of rotation (11),
characterized in that the shearing tools (14) are formed as open to one of the surface (13) side facing away from the outer surfaces (18) with the surface (13) gaps (19). A dissolver according to claim 1, characterized in that the holder (12) comprises a disc and the surface comprises at least one disc surface (13). Dissolver according to claim 1 or 2, characterized in that the gaps (19) taper with increasing gap depth or are wedge-shaped or substantially wedge-shaped. Dissolver according to one of the preceding claims, characterized in that the outer surfaces (18) of the shells (14) are convex. Dissolver according to one of the preceding claims, characterized in that the inner surfaces (21) of the shells (14) are concave. Dissolver according to one of the preceding claims, characterized in that the inner surface (21) of at least one or each shell (14) has regions (22, 23) of different curvature. Dissolver according to one of the preceding claims, characterized in that an opening (15) of at least one or each shell (14) surrounding circumferential contour (16) is elongated or oval. Dissolver according to one of the preceding claims, characterized in that the shells (14) extend away from the surface (13) in the direction of the axis of rotation (11). Dissolver according to one of the preceding claims, characterized in that at least three of the shells (14) along a to the rotation axis (11) concentric circular path (17) are arranged at a distance to each other. Dissolver according to one of the preceding claims, characterized in that at a distance on the shells (14) with the interposition of plates (27) additional shells (26) sit. Dissolver according to one of the preceding claims, characterized in that the surface comprises surface regions (13, 25) lying opposite one another, in which the shells (14) are arranged. Dissolver according to one of the preceding claims, characterized in that the holder (12) comprises a disc (42) and at a distance to this arranged plates (40) on whose surfaces (41) the shells (14) are arranged.

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