DE1557058B2 - Device for continuous mixing and homogenization of viscous liquids or liquids with powdery substances - Google Patents

Description

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The invention relates to a device for compressing through the device, since the Continuous mixing and homogenization of the device does not in itself have a conveying effect of its own viscous liquids or liquids with powder. The blending effect isn't too good as it is shaped materials, consisting of a housing, which on the soles of the threads each one ununited rotationally symmetrical mixing body tightly mixed 5 liquid layer up to the exit from the closes, which can pull through several concentrically around a device. It's also beautiful Core arranged floors consists, each floor known (German patent 26177), in one mutually parallel, helically extending webs screw press into the housing threads has to cut the webs of the abutting one, while the concentric therein Levels run crosswise to one another and the worm shaft arranged in the order rotates. In that in that formed channels of the adjacent floors on the housing incised thread will turn Crossing points are open to each other. however, deposit the mix and remove this thread

Apparatus and method for mixing and adding gear without substantial mixing pre-homogenization according to the continuous flow principle are taking place, since the material in the area of the in known in the most varied of embodiments. 15 the housing incised a thread For example, one has (German patent specification lacking sufficient promotional effect. 832 990) for homogenizing milk and it is also already known (magazine

other dispersions already proposed, Die Liquid-Maschinerie, September 30, 1955, vol. 87, p. 781/82, through a collection of contiguous and VDI-Zeitschrift, 99 [1957], No. 2, 11. 1., Balls, which are preferably in a tubular 20 p. 61/62) both a container with a thread are stored, to be pressed through, the screw housing seen as well as the associated To let the liquid flow rotate between the individual balls worm shaft. This is a divided and brought together again and achieved on this strong promotional effect, but also a very Way should be intimately mixed. This requires a strong shear effect on the material to be mixed relatively long mixing distances, as it is difficult to cross the interfaces between the two screw threads the cross-section of such a tubular mixing caused. This intense vortex and A sufficient homogeneity of the container, which causes a strong heating of the shear effect mixing liquid, because it requires good and thermally sensitive ones far too strong for the liquid particles of goods to migrate over.

the one side of the container to the other a frequent 30 Finally, it is also known (German patent division and re-merging of the font 1 054 811), flowable in a mixing trough individual streams. Accordingly, the energy material is to be mixed in the flow by the mixing shaft very high consumption. It arises in particular when it is equipped with two helical screws Higher viscosity liquids due to the strong inner which the one directly on the worm shaft Friction and by the required pressure one 35 is attached, while the other as a spiral around the increased temperature which is damaging to the inner screw spiral. It is about can act well. around the typical embodiment of a stirring

A similarly constructed device (USA.- mixer, the liquid patent to be treated in a bath 3 051 453) consists of a flow that rotates and circulates this bath. The mixing trough channels that have angular internals around a 40 is only partially filled, so that within the to divide incoming material flow into several partial flows of threads no controlled flow and then to merge again, since in the upper part of the trough the etc., in order to finally no longer full of liquid from the mixing unit at the outlet of the device to get a mixed flow of goods. Through which is captured. Such mixing troughs are only for the angular built-in components are still suitable for 45 throughput of large quantities in this device, although a higher level of energy is not required in order to sufficiently homogenize the material. to homogenize. In this device, too, the object of the invention is to provide a

It takes a large number of assembling and mixing devices to create a very good one Separation of the material in order to meet the homogenization of the mixed material with gentler points an exchange of partial streams with appropriate treatment, in particular to damaging people Ensure mixing effect. To avoid emissions from thermal influences, see of the complicated structure of the device At the same time, the device should be of particular attention high operating costs are required, and the fan-out structural design also makes them possible The desired homogenization effect is not certain - generally for the mixing of viscous liquids. 55 or liquids with powdery substances

Attempts have also been made to make two liquids interesting.

to force currents through screw windings This object is achieved according to the invention by

(British Patent 729 226), one solving that the helical ridges in their position to-auger cut into a housing ■ are fixed to each other and that the is, while the other screw turn on a 60 mixing body rotatable around the axis of the housing it is located in front of the concentrically arranged worm core and connected to a rotary drive is seen. Both the housing and the screw core or the mixing body is fixed to the housing and the are arranged stationary. Surrounds the two liquid rotatably mounted core. This will Currents are achieved through various inlets that enter the channels between the webs Threads of the housing or mixed material introduced into those of 65 flows along these channels Kerns pressed in and mix at and at the crossing points with the respectively annular interface. Even with this device flowing in the channels on the adjacent floor high pressures are required to mix the liquids. By rotating the

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Mixing body is connected to the housing wall and are open together or individually Delay of the mix achieved so that in the attached to the core.

Finally, the invention proposes yet another one

gradient is maintained. This has the advantage of being an alternative embodiment that the mix is not only distinguished between the one 5, that the helical webs of the individual crossing points of the same cross-sectional position are carved out of the inner tier from the core, exchanges, but this delay also occurs. This last solution is one in terms of manufacturing technology time-delayed additional mixing effect on, fan, the two previous execution by what A special homogenization effect can be formed, however, an easy exchange of the is achieved. During operation of the mixing body according to the invention, while the latter Surprisingly, the device has been shown to have the core exchanged with the embodiment that the goods only have to be subjected to very little thermal stress.

is subject to loads, since when mixing the In a drawing is now the invention

Material flows at the crossing points of the channels only device in several exemplary embodiments always a small amount of mix is shown schematically and is explained in more detail below is exchanged and accordingly only one is explained. It shows

little heating takes place. The more surprising F i g. 1 shows a first embodiment, partly in

The aim was to obtain a mix longitudinal section with a high degree of homogeneity at the exit of the mixing body. F i g. 2 shows a cross section through the device

According to a special constructive embodiment according to line AB in FIG. 1, approximate shape of the mixing body of FIG. 1 according to the invention. 3 a development of the mixing body,

Device, the helical webs are adjacent- Fig. 4 is a section through a second Ausfüh-

barter floors at the points of intersection with each other approximately example according to line CD in F i g. 3, but connected with. This measure gives the mixing body narrowing or widening channels of greater mechanical stability. 25 adjacent floors,

According to a further particular FIG. 5 a section through a third embodiment

Embodiment of the inventive Vorrich- rungsbeispiel along line CD in Fig. 3, the device shown that the mixing and homogenizing, but the channels of the outer tier in the webs of the effect is still further strengthened, but intervene below the inner tier, accepting a higher thermal load 30 F i g. 6 the mixing body in the middle of a conveying of the mixed material, in that, in the conveying direction, a screw is arranged and

see the channels on one floor narrowing, F i g. 7 the mixing body at the end on a conveyor the channels of the adjacent floor snake on, widen. In Fig. 1 and 2 rotates in a housing 1 a

According to another embodiment for this purpose, shaft 2, the end piece of which represents the core 3 of a mixing, viewed in the conveying direction, represents the channels body 4. The mixing body 4 consists of one tier, while the channels of the adjacent tier arranged on the core 3 and hard to the axis of rotation have a constant cross section. of the core 3 concentric level 5 from helical-Through the configuration , a pressure is built up to the outlet end of the shaped webs 6, between which channels 7 device are built up, which a 40 extend. Above it is a second floor 8, which is also allowed to convey into the rooms with higher pressure. if with helical webs 9 and in between - this also achieves a higher mixing effect. lying channels 10. At the crossing points

According to a further constructive execution 11, the webs 6 and 9 of the two floors are 5 and 8 of the apparatus according to the invention is connected. The channels 7 and 10 are mixing bodies fixed on a rotatable core. The 45 open to each other at their intersections 12. In the production of the mixing body, the webs 6 run particularly simply in this way, viewed in the direction of flow. The mixing body can, however, and channels 7 of the inner tier 5 counterclockwise, which are also attached to the housing wall. while webs 9 and channels 10 of the outer floor, however, de ^r core rotates in the mixing body. clockwise. The mixing effect happens to the

The invention proposes for the structural design 50 intersection points 12 of the channels 7, 10.

Solutions before, but it is not limited to this: body 4 from a sleeve, on the inside of which the

According to one embodiment, the helical webs 6 are worked out by mixing bodies from a sleeve, from the outside of which the channels 7 are cut are carved out by cutting the channels 10th inner tier, the FIG. 3 shows the execution of a section of the

The outer diameter of the inner floor is at least mixed body 4. The webs 6 and channels 7 correspond to the inner diameter of the outer floor. inner floor 5 cross perpendicularly with the

According to a further advantageous embodiment, webs 9 and channels 10 of the outer tier 8. Form of the mixing body, the helical FIGS. 4, the housing 401 surrounds the two

Web of the outer tier from a first box floors 405 and 408 of the mixing body 404. The worked out and the helical webs of the outer tier 408 has channels 410, which narrow in the inner tier from a second sleeve, the conveying direction narrowing, while the channels outside diameter of the inner sleeve to the inner 65 407 of the inner floor 405 . As a result, the diameter corresponds to the outer one, so that the part of the material flowing into one another in the two canals 410 opening into one another can be pushed into the widening canals. The two sleeves can be forced together 407.

In Fig. 5 is the transition of the mix the inner floor 505 in the outer floor 508 of the mixing body 504 is favored in that the Channels 510 of the outer tier engage in the webs 506 and channels 507 of the inner tier 505.

In Fig. 6, a worm shaft 602 with a feed thread 613 rotates in the housing 601, that by the interposition of a mixing body 604 of the embodiment according to FIG. 1 and 2 is interrupted. The mixing body 604 is fixedly arranged on the shaft core 603 and rotates with it. The friction of the product on the wall of the housing 601 results in this in the outer tier 608 conveyed product brought to a different pressure than that conveyed through the inner tier 605 Product, so that there is a constant overflow at the intersections 612.

In Fig. 7, the mixing body 704 is arranged around the end of a worm shaft 702, which acts as the core 703 is used. The mixing body 704 is locked by a fixing screw 714 so that it does not rotate with it. There is therefore a relative movement between core 703 and mixing body 704, similar to that in the channels 707 flowing product impresses a velocity gradient in the radial direction and thereby the Ensures mixing success. The housing 701 is in a simple manner against the one surrounding the worm shaft 702 Housing 715 counter-flanged.

Claims (8)

Patent claims: 1. Device for continuous mixing and homogenizing of viscous liquids or liquids with powdery substances, consisting of a housing that has a rotationally symmetrical Mixing body tightly encloses, def of several concentric around a core arranged floors, each floor parallel, helically extending Has webs, the webs of the adjacent floors crosswise to one another run and the channels formed by the neighboring floors at the intersections are open to each other, characterized in that the helical webs (6, 406, 506, 606, tov. 9, 409, 509, 609) in their Position to each other are fixed and that the mixing body (4, 404, 504, 604) around the axis of the housing (1, 401, 501, 601) is rotatably mounted and connected to a rotary drive, 2. Device according to claim 1, characterized in that the helical webs (4) Adjacent floors (5) are connected to one another at the intersection points (11). 3. Device according to claims 1 and 2, characterized in that, in the conveying direction seen, the channels (410) of one floor (408) narrow, while the channels (407) the adjacent floor (405). 4. Device according to claims 1 and 2, characterized in that, viewed in the conveying direction, the channels (510) of one floor (508) engage in the channels (507) and helical webs (506) of the adjacent floor (505). 5. Device according to claims 1 to 4, characterized in that the mixing body (4, 604) is fixed on the rotatable core (3, 603) Λ. ™ 6. Device according to claims 1 to 5, characterized in that the mixing body (4) consists of a sleeve, on the outside of which the helical webs (9) of the outer floor (8) and on the inside the helical webs (6) of the inner tier (5) worked out are, the outer diameter of the inner tier (5) at least the inner diameter of the corresponds to the outer floor (8). 7. Device according to claims 1 to 5, characterized in that the helical The webs (9) of the outer floor are worked out from a first sleeve and the helical ones Web (6) of the inner tier from a second sleeve, the outer diameter the inner sleeve corresponds to the inner diameter of the outer one. 8. Device according to claims 1 to 4, characterized in that the helical webs (6) of the inner floor (S) from the core (3) _Λ are worked out. \ 1 sheet of drawings