EP3334519A1

EP3334519A1 - Device and method for dispersing at least one substance in a fluid

Info

Publication number: EP3334519A1
Application number: EP16762959.1A
Authority: EP
Inventors: Dominik Kastl; Markus Nichterlein
Original assignee: Netzsch Feinmahltechnik GmbH
Current assignee: Netzsch Feinmahltechnik GmbH
Priority date: 2015-08-13
Filing date: 2016-07-23
Publication date: 2018-06-20
Anticipated expiration: 2036-07-23
Also published as: JP6715322B2; BR112018002340A2; JP2018522727A; BR112018002340B1; KR20180053303A; US20180236423A1; CN107921382B; PL3334519T3; DE102016102728A1; CN107921382A; EP3334519B1; ES2879389T3; KR102531425B1; WO2017025073A1; US10946355B2

Abstract

The invention relates to a device and a method for dispersing at least one substance in a fluid. Said device comprises a process housing (5) with a rotor (3), a fluid supply (7), a feed line (6) for the at least one substance being dispersed and having at least one outlet opening (21), and a product outlet (8). The rotor (3) causes, in at least some sections, a supplied fluid to be conveyed axially. The rotor (3) also causes, in at least some sections, the supplied fluid to be coveyed radially.

Description

Apparatus and method for dispersing at least one substance in a fluid

The present invention relates to an apparatus and a method for dispersing at least one substance in a fluid according to the features of the preambles of claims 1 and 15.

State of the art

The invention relates to a device for dispersing a substance in a fluid, in particular in a suitable liquid. Dispersing is understood to mean the mixing of at least two substances which do not dissolve or barely dissolve or chemically bond with one another. During dispersion, one substance (disperse phase) is distributed into another substance (continuous phase), forming an emulsion or a suspension. In the case of an emulsion, the disperse phase is likewise liquid, while in the case of a suspension, solid particles are finely distributed in a liquid.

Many dispersing devices are based on the so-called rotor-stator principle. In this case, a rotor is moved at a high peripheral speed. This rotation causes a suction which sucks the medium into the rotor and forces it out through the openings, teeth or the like of the stator, the disperse phase dispersing in the continuous phase.

DE 4118870 A1 describes a device for wetting and dispersing powders in liquids. The entry of the powder substances takes place at low concentrations in a single pass. At high concentrations, work is continued in circulation until the final concentration is reached. This device uses a classic rotor-stator system, which is subject to high wear. In addition, a flow resistance is generated by the built-in stator, which the

Pumping action of the device limited. DE 3002429 C2 discloses a device for mixing at least one substance with a liquid. The substances to be mixed are introduced via lateral connecting pipes into a tube surrounding the rotor shaft. The fluid enters the open end of the stator in an existing between the stator and the rotor shaft surrounding the tube space, reaches the blades of the rotor and then exits again at the lower open end of the stator. The substances to be dispersed are introduced by introduction via the connecting pipes below the level of the liquid. It is possible to mix the substances to be mixed in such a way below the liquid level that they have no contact with the surrounding atmosphere prior to mixing. According to the description, grinding media in the first process area can also be used in this machine. However, this leads to a flow resistance, which negatively influences the pumping action. It also comes through the use of grinding media within the machine to increased wear, especially on the separator. DE2676725 describes a device for mixing, in particular for

Dispersing. This includes a housing, a separator and a

Rotor unit. The separating device divides the housing into a first one

Process area and a second process area. A first section of the

Rotor unit is arranged in the first process area and a second portion of the rotor unit is arranged in the second process area. The supply of the substances to be mixed to the first process area is spaced from the

Rotor unit. This creates the risk of contamination of the powder feed by liquid or liquid powder mixture.

DE2004143 discloses an apparatus for the preparation of emulsions and suspensions in the form of a centrifugal homogenizing machine. They use a rotor-stator system in a multi-row design. A multi-part design usually means increased maintenance. In addition, more parts can wear, which must be replaced accordingly, which leads to increased costs. The powder suction tube and the tube supplying the liquid end in each case on the front side of the rotor, wherein the gap between the mouth of the inlet tubes and the rotor can be adjusted and thus changed. The object of the invention is to provide an improved device for dispersion of at least one substance in a fluid, in particular a device for dispersion of at least one powdery substance in a liquid. Preferably, the device should be more compact and thus

save space to run as known from the prior art

Devices, furthermore, the device should be technically simple and thus inexpensive to produce and have low maintenance requirements.

The above object is achieved by an apparatus and a method for

Dispersing a substance dissolved in a fluid that has the characteristics in the

Claims 1 and 15 include. Further advantageous embodiments are described by the subclaims.

description

The invention relates to an apparatus for dispersing at least one substance in a fluid. Such a device comprises a process housing with a rotor, a fluid supply, a supply line for the at least one substance to be dispersed with at least one outlet opening, and a

Product outlet. The rotor is operated for example via an electric motor drive, which is arranged outside of the process housing. In particular, the rotor is arranged on a drive shaft, for example, with a

Mechanical seal performed by one of the housing walls of the process housing and sealed and rotatably supported by a bearing.

The rotor is designed such that at least in regions, an axial delivery of a supplied fluid can be generated with the rotor. Furthermore, at least in regions, a radial delivery of the supplied fluid can be generated with the rotor.

Preferably, the rotor comprises at least one first means for generating the at least regional axial conveying and at least one second means for generating the at least regional radial conveying of the supplied fluid. According to one embodiment of the invention, it is provided that the regions of the axial conveying and the radial conveying do not overlap, that is to say that a first region is provided in which predominantly or completely an axial conveying takes place and a second region is provided the

predominantly or completely a radial promotion takes place. Optionally, an intermediate area exist by both an axial and a radial promotion takes place. Thus, embodiments are also conceivable in which the regions of the axial and the radial conveying at least partially overlap.

According to one embodiment of the invention, in a first region, an axial conveyance of the supplied fluid takes place predominantly. Furthermore, in this first region also already a slight radial promotion, which merges in the direction of the product outlet of the device in a completely radial delivery of the fluid.

In order to prevent fluid from getting into or to the at least one outlet opening, it is provided according to a preferred embodiment that the supply line for the substance to be dispersed is at least partially enclosed by the rotor. In particular, the at least one

Outlet of the supply line associated with a region of the rotor, in which the fluid is predominantly conveyed axially. To achieve this, the rotor preferably has conductive structures that generate the axial conveying action of the rotor. The lead structures are in particular designed such that on the one hand the at least one first means for

Generation of at least partially axial promotion represent and on the other hand, the at least one second means for generating the at least

areawise form radial promotion.

Furthermore, the rotor has a widening cross section, in particular, the cross section of the rotor widened on the drive side, that is, in the direction of the side facing away from the supply line for the substance to be dispersed on the rotor side. Due to this broadening of the rotor cross-section in the direction

Product outlet, in particular in combination with the guide structures of the rotor, is the axial promotion of the fluid in the region of the at least one outlet opening with increasing rotor cross section in a radial conveying action. Furthermore causes the rotation of the rotor generated by the drive, causing the fluid to rotate.

The lead structures are preferably on the supply line for the

dispersant-facing side of the rotor formed. The rotor has a solid rotor core, the cross-section of which - as already described - widens at least in regions in the direction of the product outlet. At least one of the guide structures is preferably extended beyond a solid core of the rotor in the axial direction in the direction of the feed line for the substance to be dispersed. Preferably, a plurality of conductive structures is extended beyond a solid core of the rotor in the axial direction in the direction of the feed line for the substance to be dispersed. According to one embodiment, it is provided that the at least one outlet opening of the feed line for the substance to be dispersed is at least partially enclosed by the at least one extended guide structure, so that the substance to be dispersed is released from the feed line within structural elements of the rotor.

According to one embodiment, it is provided that the number of

extended lead structures in terms of the number of total lead structures is variable. For example, a rotor may have such a high density of conductive structures that it is sufficient for the functionality of the conductive structures if only every second conductive structure has an extension beyond the rotor core.

The supply line for the substance to be dispersed is in particular arranged such that the at least one outlet opening for the substance to be dispersed is at least partially enclosed by the extended guide structures outside the solid rotor core. By occurring during the rotation of the rotor and on the fluid and / or the at least one

Centrifugal forces acting on the outlet opening material effectively from the at least one outlet opening of the supply line for the

Keeping dispersant substance away, so that sticking of the substance to be dispersed in or at the at least one outlet opening of the feed line for the substance to be dispersed can be effectively prevented.

According to a further embodiment, the rotor may have a plurality of guide structures, which are formed in the region of the rotor surface. It is It is conceivable to extend only one guide structure beyond the rotor core and to form the extension in such a way that it encloses the outlet opening for the substance to be dispersed at least partially or largely comprehensively. For example, the extension of the one guide structure could helically be guided around the longitudinal axis of the feed line for the substance to be dispersed.

The guide structures are in the region of their extension beyond the massive rotor core beyond in the central region of the rotor, that is, in the region of

Rotary axis of the rotor, designed as a receptacle for the supply line for the substance to be dispersed. In particular, the guide structures have, in the region of their extension, a central recess which is formed corresponding to the feed line for the substance to be dispersed.

According to a preferred embodiment, the guide structures are aligned in the region of their extension beyond the solid rotor core coaxially to the axis of rotation of the rotor. The extension of the guide structures forms in particular the first means for generating the at least regional axial promotion.

Furthermore, the guide structures are curved in the region of the massive rotor core. The curved subregion of the guide structures forms, in particular, the second means for generating the radial conveying at least in regions. Due to the curvature of the conductive structures, a high outlet pressure and a good conveying effect are achieved. In particular, the curved guide structures support the radial

Promotion during rotation of the rotor.

The extended lead structures cause, even in the region of the at least one outlet opening, although it is arranged outside of the solid rotor core, axial delivery of the fluid towards the solid rotor core, or in the direction of the product outlet, is achieved. The rotation of the rotor also causes centrifugal forces, which prevent fluid from entering inside. In particular, the centrifugal forces prevent fluid from entering the receiving area between the elongated guiding structures in which the at least one outlet opening is arranged. According to one embodiment of the invention, it is provided that the

Supply line for the substance to be dispersed has a first longitudinal axis.

In particular, the supply line for the substance to be dispersed as a tube with a formed first longitudinal axis. The rotor is rotatably mounted about an axis of rotation, for example, the axis of rotation is formed by the drive shaft. The longitudinal axis of the feed line for the substance to be dispersed and the axis of rotation of the rotor may, according to one embodiment, preferably be aligned coaxially or parallel to one another. The outlet opening of the supply line for the to be dispersed

According to one embodiment, substance can be arranged in alignment with the longitudinal axis of the feed line for the substance to be dispersed and the axis of rotation of the rotor.

According to a further embodiment it is provided that the supply line for the substance to be dispersed is arranged at an angle to the axis of rotation of the rotor. Also in this embodiment, the supply line for the substance to be dispersed ends in the center of the rotor. In particular, the feed line formed at an angle to the rotor axis for the substance to be dispersed is also arranged in this embodiment such that the at least one outlet opening of the feed line for the substance to be dispersed is at least partially enclosed by the extended guide structures outside the solid rotor core. This prevents fluid from entering the supply line for the substance to be dispersed. Instead, the fluid is discharged via the centrifugal forces due to the rotation of the rotor directly to the outside via the guide structures of the rotor.

Due to the angular entry of the supply line for the substance to be dispersed into the rotor, the recess formed by the extended guide structures must be open. This leads to a larger distance between the outlet opening of the feed line for the particles to be dispersed in the lower region

Substance and the rotor, while in the upper region of the desired small distance between the outlet opening of the supply line and the extended

Lead structures of the rotor results. However, the lower enlarged distance is

unproblematic because the fluid does not tend to flow from below into the supply line.

An essential advantage of this further embodiment with an angular arrangement of the feed line is that the fluid is in particular in the

switched off state of the device is not in the supply line for the too can flow in dispersing substance. Thus, even in the resting state of

Device sure ensures that no fluid enters the supply line and thus can not stick a substance to be dispersed within the supply line. Furthermore, it can be provided that the fluid supply is arranged substantially orthogonal to the supply line for the substance to be dispersed. For example, the

Fluid supply having a second longitudinal axis. In particular, the

Fluid supply formed as a tube with a second longitudinal axis. The

Fluid supply is arranged on the process housing spaced from the rotor, in particular on the side of the supply line for the substance to be dispersed, so that filled fluid flows around the supply line for the substance to be dispersed at least partially.

According to a further embodiment, it is provided to arrange the fluid supply largely obliquely to the feed line for the substance to be dispersed, in particular at an angle between 0 degrees and 90 degrees. The fluid is carried over the guiding structures of the rotor and due to the at

Centrifugal forces arising from the rotation of the rotor are passed outwards from the center of the rotor, so that the fluid can not reach the middle region in which the at least one outlet opening of the feed line for the substance to be dispersed is arranged. In particular, the fluid thus does not enter the region of the axis of rotation of the rotor.

According to one embodiment of the invention, it is provided that the

Supply line for the substance to be dispersed can be adjusted axially,

In particular, the supply line for the substance to be dispersed relative to the process housing along its longitudinal axis axially and / or parallel to

Rotation axis of the rotor to be moved. Thus, the immersion depth of an end region of the feed line for the substance to be dispersed in the extended guide structures of the rotor and thus the distance between the at least the at least one outlet opening comprising the end portion of the feed line for the substance to be dispersed and the solid core of the rotor in dependence be changed substance supplied.

Between the extended guide structures of the rotor and the feed line for the substance to be dispersed, a radial distance is preferably formed. Of the Distance is necessary so that the substance can escape from the at least one outlet opening and pass into the fluid between the guide structures. Preferably, there is a distance of approximately 0.1 mm to approximately 10 mm in the radial direction between the extended guide structures of the rotor and the feed line for the substance to be dispersed. It is further provided that between the supply line for the substance to be dispersed and the rotor in the axial direction, a gap is formed, through which the substance passes radially into the fluid.

According to one embodiment of the invention, the rotor has a plurality of conductive structures, wherein only a part of the conductive structures have axial extensions formed as first means for generating the at least regional axial promotion. For example, the rotor has an even number of

Lead structures, with only every second conductive structure axially over the massive

Rotor core is extended out. This may be useful in particular with a high density of conductive structures on the rotor core. In particular, this prevents the extensions form such a tight ring around the axis of rotation that a transfer of the substance from the supply line could be hindered in the fluid.

The supply line for the substance to be dispersed may have an increased diameter in the region of the at least one outlet opening, for example in the form of a bend which serves as an additional deflecting element.

This additionally ensures that no fluid can enter and / or reach the at least one outlet opening of the supply line.

The at least one outlet opening does not have to be the open end of the

Be formed supply line for the substance to be dispersed. According to one

Embodiment of the invention, the feed line for the substance to be dispersed is formed by a tube whose closed end in the direction of the solid rotor core between the guide structures is closed and which has in this end a plurality of lateral openings as outlet openings for the substance in the radial direction. The substance is also conveyed outwards by the centrifugal forces, that is, in the direction of the outer edge of the rotor. At this time, the substance becomes in the fluid dispersed. This is done in particular on the outer edge region of the rotor in a space between the rotating rotor and the static process housing.

According to a further embodiment it can be provided that the

Inner diameter of the supply line for the substance to be dispersed is variable and thus can be adapted to the requirements of the supply line for the substance to be dispersed. In particular, the flow rate and the

Flow rate can be adjusted. For example, it can be provided that the cross-section reducing format parts in the supply line for

dispersing substance can be inserted to vary the diameter and thus the cross-sectional area of the feed line for the substance to be dispersed. The variable setting is done for example by using additional inner tubes with smaller diameters for the powder feed tube. The inner tubes may for example be made of PTFE or another suitable

Plastic exist. Alternatively, there is an exchange of rotor and feed tube, wherein for example several different sizes of rotor and powder feed tube can be present for selection as format parts.

According to one embodiment of the invention, the first longitudinal axis of the feed line for the substance to be dispersed is oriented horizontally and the second longitudinal axis of the fluid feed line is arranged vertically. In particular, can

be provided that the fluid supply takes place from above.

The fluid enters the process housing via the fluid supply and is detected by the rotor, which accelerates the fluid in the axial and radial directions.

As a result, a pumping effect is achieved, which fluid through the

Pump product outlet into a container. The high pumping effect creates a negative pressure in the process housing. As soon as the supply line for the to be dispersed

Substance is opened, due to the negative pressure in the process housing creates a suction. As a result, the substance through the supply line for the to be dispersed

Sucked substance. The substance occurs over the lengthened between

Leader structures arranged at least one outlet opening and passes radially into the fluid. The resulting dispersion or suspension is discharged through the rotor from the process housing via the product outlet. Through the narrow gap between the conductive structures and the supply line for the substance to be dispersed the fluid is prevented by centrifugal forces from flowing into the feed line for the substance to be dispersed.

Alternatively, the supply of the substance to be dispersed can also be effected gravimetrically. In this case, the feed line for the substance to be dispersed is made vertically or at an angle equal to or less than 70 ° to vertical.

The invention further relates to a method for dispersing at least one substance in a fluid, in particular in a liquid, by means of a device comprising a process housing with rotor, a

Fluid supply, a supply line for the at least one substance to be dispersed with an outlet opening, and a product outlet. The rotor causes, at least in regions, an axial delivery of a supplied fluid. Furthermore, the rotor at least partially causes a radial promotion of the supplied fluid.

The method may alternatively or in addition to the features described one or more features and / or properties of the previously described

Device include.

The device and method are suitable for dispersing a substance in a fluid, in particular in a fluid. In particular, it is with the

Device according to the invention and / or the inventive method possible, a powdery solid largely without the aid of mechanical forces as for example by a classic rotor-stator system or by the

Use of grinding media is produced, wet and / or disperse. Instead of mechanical forces are in the device or in the

Process exploited physical effects, such as pressure differences and the associated expansion and compression of air contained in the powder. The device is more compact than conventionally known devices. Because the

Device is technically simpler than known devices, this can be produced more cheaply. The technically simplified structure facilitates the cleaning and maintenance of the device. The simplified cleaning makes the

Device especially for smaller and medium product approaches and more frequent

Product change interesting. The device does not use a classical rotor-stator principle to disperse the substance to be dispersed in a fluid. This means in particular that the product does not have to be pumped through a stator. The advantage here is a lower shear of the product. Furthermore, the device and the method are characterized by a lower energy input, whereby the temperature increase is also lower than in conventionally known devices. Furthermore, the device is less prone to failure and / or susceptible to wear. In particular, the device is less sensitive to foreign bodies contained in the powdery substance to be dispersed or in the fluid.

Fiqurenbeschreibung

In the following, embodiments of the invention and their advantages with reference to the accompanying figures will be explained in more detail. The proportions of the individual elements to one another in the figures do not always correspond to the actual size ratios, since some shapes are simplified and other shapes are shown enlarged in relation to other elements for better illustration.

FIG. 1 shows a schematic cross section of a dispersion device according to the invention.

FIG. 2 shows a perspective view of a dispersion device according to the invention.

FIG. 3 shows a perspective view of a process housing of a dispersion device.

Figure 4 shows a schematic sectional view of another

Embodiment of a process housing in a side view. Figure 5 shows a perspective view of a rotor with storage.

Figure 6 shows a plan view of the rotor with storage.

FIG. 7 illustrates a first working mode.

FIG. 8 illustrates a second working mode. FIG. 9 shows a side view of a further embodiment of a dispersion device according to the invention.

FIG. 10 shows a sectional representation through a side view of an embodiment of a dispersion device according to the invention according to FIG. 9.

FIG. 11 shows a schematic sectional view of the process housing of the embodiment according to FIG. 9.

FIG. 12 shows a detailed detail from FIG. 11.

FIG. 13 shows a perspective view of the process housing of the dispersion device according to FIG. 9.

FIG. 14 shows a perspective view of a rotor with mounting of the embodiment according to FIG. 9.

For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure. The illustrated embodiments are merely examples of how the device or the method according to the invention can be configured and do not rigidify any final limitation.

FIG. 1 shows a schematic cross-section of a dispersion device 1 according to the invention, and FIG. 2 shows a perspective view of a dispersion device 1 according to the invention. The dispersion device 1 is used in particular to produce a powdery substance P in a fluid F,

in particular a liquid, to disperse and thereby produce a dispersion D. The dispersion device 1 comprises a drive motor (not shown), a bearing 9, in which the drive shaft 2 is mounted and a

Clutch lantern with internal shaft coupling and drive motor (not shown) for transmitting power from the motor shaft to the drive shaft 2. The drive shaft 2 serves to drive the rotor 3. Furthermore, the

Dispersion device 1, a rotating support of the drive shaft 2, which is guided by a mechanical seal 4 in a process housing 5. In the process housing 5, in which the dispersion takes place, a rotor 3 and a product outlet 8 for discharging the product, in particular the dispersion D, are arranged. The process housing 5 is further associated with a supply line for the powdery substance P to be dispersed, in particular a powder feed 6 for supplying powder P, and furthermore a fluid feed 7 for supplying fluid F (see FIG. 2).

Figure 3 shows a perspective view and Figure 4 shows a

schematic sectional view of a process housing 5 with powder feed 6, fluid supply 7 and product outlet 8. FIGS. 5 and 6 show different representations of an embodiment of the rotor 3.

The rotor 3 is rotatable about a rotation axis R and has a solid rotor core 10. The rotor 3 has a cross-sectional area Q which increases at least in regions toward the drive side. In other words, the cross-sectional area Q of the rotor 3 decreases in the direction of the powder feed 6. More specifically, the rotor 3 has a first cross-sectional area Q1 in a region adjacent to the powder feed 6 that is smaller than a second cross-sectional area Q2 in a drive-proximal region of the rotor 3 (compare in particular FIG. 4).

On the rotor core 10 guide structures 11 are arranged, which cause a directed guidance of the fluid F or the powder P. Each conductive structure 11 essentially comprises two partial regions 12, 13, wherein the first partial region 12 is arranged and fastened to the solid rotor core 10 and wherein the second partial region 13 represents an axial extension 14 of the conductive structure 11 beyond the solid rotor core 10. In particular, the guide structures 11 are inclined in the axial direction in the region of the extensions 14, so that they in particular convey axially. In contrast, the guide structures 11 in the first portion 12 are additionally curved backwards in order to achieve a high output pressure and a good conveying effect.

The extensions 14 of the guide structures 11 are in the area of

Rotary axis R of the rotor 3 recessed and form an axial opening 15. This opening 15 serves in particular as a receptacle 16 for an end portion 20 of

Powder feed 6 (see Figures 1 and 4). In particular, within the

16 recording the at least one powder outlet opening 21 of the powder supply 6 of the guide structures 11 of the rotor 3 enclosed (see Figures 1 and 4). at Rotation of the rotor 3 about the axis of rotation R give rise to centrifugal forces which cause the fluid F to flow outwards and thus from the rotor

Powder outlet 21 is kept away. Thus, penetration of fluid F into the powder feeder 6 can be effectively prevented. In particular, the immersion region EB (see FIGS. 1 and 4) corresponds to the powder feed 6 being immersed in the rotor 3 at least in regions, in particular the immersion region EB, in which the powder feed 6 enters the

Extensions 14 of the lead structures of the rotor 3 is immersed, thus also the

Outlet area AB, in which the powder P from the at least one

Powder outlet opening 21 of the powder supply 6 emerges and in particular into the fluid F passes.

The rotor 3 is preferably shaped in such a way that an axial conveying action of the fluid F in the direction of the solid rotor core 10 or in the direction of the product outlet 8 is already achieved in the region around the end region 20 of the powder feed 6. This axial promotion goes with increasing diameter of the rotor 3, that is, with increasing cross-sectional area Q of the rotor 3 in the direction

Product outlet 8 in a radial conveying effect over, up to a region in which the fluid F is only radially conveyed. In addition to the axial or radial conveying effect, the fluid F by the rotation of the rotor 3 to the

Rotation axis R set in rotation.

The powder feed 6 can be closed in the end region 20 and have lateral openings as powder outlet openings 21, via which preferably an exit of the powder from the powder feed 6 takes place in the radial direction.

It can be provided that the powder feed 6 can be displaced axially along a longitudinal axis L6. The longitudinal axis L6 can preferably be aligned coaxially or parallel to the axis of rotation R of the rotor 2. By way of the axial displacement of the powder feed 6, in particular the depth which the end region 20 of the powder feed 6 dips into the extensions 14 of the guide structures 11 can be adjusted. In the radial direction, a distance is formed between the extensions 14 of the guide structures 11 and the powder feed 6. This distance ensures in particular an undisturbed rotation of the rotor 3 to the

Powder feed 6 around and continues to allow the unimpeded discharge of the powder P from the at least one powder outlet opening 21. The radial distance between the extensions 14 of the guide structures 11 and the powder feed 6 is preferably between 0.1 mm and 10 mm. It is clear to the person skilled in the art that the distance is matched in particular to the size of the overall device or to the substances and / or products to be processed.

Furthermore, there is a gap S in the axial direction between the powder feed 6 and the solid rotor core 10, through which the powder P supplied via the powder feed 6 passes radially into the fluid F.

A distance A between rotor 3 and process housing 5 (see FIGS. 1 and 4) is between 0.1 mm and 10 mm. The smaller the distance A, the higher the shear forces acting within the fluid F, which may favor the dispersing effect.

The powder feed 6 may have an enlarged outer diameter in the end region 20, in particular in the region of the at least one powder outlet opening 21. The increased diameter serves as an additional deflecting element, which additionally prevents penetration of fluid F into the region of the powder outlet opening 21.

The supply of the fluid F, of the powder P or of a product suspension or dispersion D takes place via relatively large tube cross sections of the powder feed 6 and fluid feed 7

Low flow resistance and it can also be processed products to medium viscosities without pump. If, for example, a product is circulated in order to add successive powder P until the desired final concentration is reached, the addition of the product already containing powder generally takes place via the feed line of the fluid feed 7.

In order to optimally process products with different viscosities, at the product inlet of the fluid supply 7 for throttling the

Flow for products with low viscosities a valve or the like installed (not shown). In the case of the dispersion device 1 according to the invention, the supply of fluid F can take place as a function of the respective fluid F or circulating dispersion product D with or without a pump.

The fluid F enters the process housing 5 in the product inlet of the fluid feed 7, is detected by the rotating rotor 3 and accelerated in the axial and radial directions. This results in a pumping action, which pumps the fluid F through the product outlet 8 back into a container (not shown). This creates a negative pressure in the process housing 5. As soon as the powder feed 6, which is usually regulated by a valve (not shown), is opened, a suction occurs due to the negative pressure in the process housing 5. The powder P is in the direction of

Rotor 3 sucked. The powder P exits the powder feed 6 via the at least one powder outlet opening 21 and passes radially into the fluid F. The resulting dispersion D is discharged through the rotor 3 from the process housing 5 via the product outlet 8. Due to the narrow gap between the guide structures 11 and the powder feed 6, the fluid is prevented by centrifugal forces in the

To infuse powder feed 6.

The valves on the fluid supply 7 or on the powder supply 6 are in particular provided either to open the supply completely or to completely close, in order to prevent flooding of the dispersion device 1. The inventive dispersion device 1 can without additional

Machines are used. It will only be a product or

Batch container (not shown) and a suitable powder delivery system (not shown) is needed. Conventionally known systems, for example a suction lance, a bag-feeding station, a Big Bag feed station, a silo or the like are suitable as the powder feed system. With the dispersion device 1, powders P in fluids F, in particular in liquids, can be sucked in and finely dispersed.

FIG. 7 shows a first operating mode AM1 and FIG. 8 shows a second operating mode AM2. In the first operating mode AM1 according to FIG. 7, the powder feed 6 is open. In particular, a valve (not shown) regulating the powder feed 6 is opened. In this first working mode AM1, the fluid F or the dispersion product D circulates in the fluid F

dispersed powder P between a product or batch tank and the dispersion device 1 (only the process housing 5 with the inlets and outlets 6, 7, 8 is shown in Figures 7 and 8), powder P being continuously supplied, in particular sucked in, via the powder feed 6. The powder feed can be conveyed, for example, via a Funnel, a BigBag station, a silo, a suction lance or the like.

In a second operating mode AM2 according to FIG. 8, the powder feed 6 is closed by means of a valve (not shown). Instead, that circulates

Dispersion product D continuously between the product or

Batch tank and the process housing 5 of the dispersion device 1. This creates a strong negative pressure in the process housing 5, which leads to (micro-) cavitation within the dispersion D. Furthermore, the dispersion product D, that is, the powder P dispersed in the fluid F, is sheared between the guide structures 11 and the process housing 5 (see FIGS. 1 and 4). In order to achieve a higher pressure and a higher residence time of the dispersion product D or the powder P dispersed in the fluid F in the process housing 5, a further valve (not shown) can be arranged at the product outlet 8 or the product flow is throttled with a corresponding pipeline. These measures or effects have a positive effect on the quality of dispersion.

FIG. 9 shows a side view of a further embodiment of a dispersion device 1 according to the invention. FIG. 10 shows a sectional view through the dispersion device 1 according to FIG. 9. FIG. 11 shows a schematic sectional view and FIG. 13 shows a perspective view of FIG

Process housing of the embodiment of Figure 9. Figure 12 represents a

11 shows a detail and FIG. 14 shows a perspective view of a rotor bearing the embodiment of the dispersion device 1 according to FIG. 9. Identical components are provided with the same reference numbers as in FIGS. 1 to 8, whose description is hereby incorporated by reference.

The dispersion device 1 comprises a drive motor (not shown), a bearing 9 in which the drive shaft 2 is mounted and a coupling lantern with internal shaft coupling. The dispersion device 1 further comprises a drive motor (not shown) for transmitting power from the motor shaft to the drive shaft 2, which serves to drive the rotor 3. Furthermore, a rotating Storage of the drive shaft 2 is provided, which is guided by a mechanical seal 4 in a process housing 5. In the process housing 5, in which the dispersion of a powdery substance P takes place in a fluid F, are a rotor 3 and a

Product outlet 8 for discharging the product, in particular the dispersion D, arranged. The process housing 5 is still a supply line for the

associated dispersing powdery substance P, in particular a powder supply 6 ^* , and further a fluid supply 7 * for supplying fluid F.

In contrast to the embodiment illustrated in FIGS. 1 to 8, in the embodiment illustrated in FIGS. 9 to 14, the longitudinal axis L6 ^{* of} the powder feed 6 ^{* is arranged} at an angle α to the axis of rotation R of the rotor 3. In particular, the powdery substance P is thus fed from obliquely downwards to the rotor 3. The powder feed 6 ^* ends analogously to the powder feed 6 according to FIGS. 1 and 4 in the center of the rotor 3, in particular the end region 20 of the powder feed 6 * emerges with the powder outlet opening 21 between the axial

Extensions 14 * of the conductive structures 11 of the rotor 3 a. Analogous to the im

In connection with the guide structures 11 described in detail in FIGS. 5 and 6, the extensions 14 * of the guide structures 11 are likewise in the region of FIG

Rotary axis R of the rotor 3 recessed and form an axial opening 15 ^* . This opening 15 * serves in particular as a receptacle 16 ^* for an end region 20 of the powder feed 6 ^* (compare in particular FIGS. 12 and 14). In particular, the at least one powder outlet opening 21 of the powder feed 6 ^* within the

Receiving 16 ^* enclosed by the extensions 14 ^{* of} the guide structures 11 of the rotor 3 (see Figure 10 to 12). As the rotor 3 rotates about the axis of rotation R, centrifugal forces arise which cause the fluid F to be discharged to the outside and thus kept away from the powder outlet opening 21. Thus, penetration of fluid F into the powder supply 6 * can be effectively prevented.

In particular, the immersion region EB, in which the powder feed 6 ^* at least partially immersed in the rotor 3, in particular the immersion region EB, in which the powder feed 6 * dips into the extensions 14 ^{* of} the guide structures 11 of the rotor 3, thus also the exit region AB, in which the powder P emerges from the at least one powder outlet opening 21 of the powder feed 6 * and

especially in the fluid F passes. Also in this embodiment, the powdery substance P is thus supplied in the center of the rotor 3, as in particular in the enlarged

Detailed illustration of Figure 12 is clearly visible. The rotor blades

or guide structures 11 enclose the end region 20 of the powder feed 6 ^* and thereby effectively prevent fluid F from entering the powder feed 6 ^* . Through the guide structures 11, in particular over the first portion 12 of the guide structures 11, the fluid F is centrifuged to the outside. The special design of the powder feed 6 * immersed in the rotor vanes or guide structures 11 thus forms a dynamic barrier between the powdery substance P and the fluid F.

The end region 20 of the powder feed 6 * can be cut off in the inlet region EB, in which it dips into the rotor 3, so that the end region 20 forms a surface perpendicular to the axis of rotation R of the rotor 3. Alternatively, the end region 20 can be cut off at an arbitrary angle to the longitudinal axis L6 ^{* of} the powder feed 6 ^* .

The angle a, in which the powder feed 6 * is arranged to the axis of rotation R of the rotor 3, can be between 0 ° and 90 °. The distance of the powder supply 6 * to the rotor 3 can be arbitrarily between 0.5 mm and 100 mm. The

Covering the rotor blades or the overlap of the extensions 14 ^{* of} the conductive structures 11 beyond the powder supply 6 ^* beyond, in particular the

Enclosing the powder feed 6 * through the extensions 14 ^{* of} the lead structures 11, may preferably be between 1 mm and 100 mm.

Due to the angled entry of the powder feed 6 ^* into the axial opening 15 ^* or receptacle 16 * between the axial extensions 14 ^{* of} the conductive structures 11, the recess between the extensions 14 ^* , which forms the opening 15 ^* or receptacle 16 ^* , open to allow unimpeded rotation of the rotor 3 (see Figure 12). This results in the lower region, a first distance A1 between the powder supply 6 ^* and the extensions 14 ^* and in the upper region results in a second distance A2 between the powder supply 6 ^* and the extensions 14 ^* . In this case, the first distance A1 is greater than the second distance A2. The larger first distance A1 in lower range is not a problem, since no fluid F flows from below into the powder supply 6 *.

This embodiment has become particularly at standstill of

Dispersion device 1 has proven to be advantageous if residual fluid is still present in this optionally. In the embodiment according to Figures 1 to 7, it may in exceptional cases at rest to an inflow of residual fluid in the

Powder supply 6 come, which can then lead to a sticking of the powdery substance P within the powder supply 6.

In an embodiment with an inlet geometry of the powder feed 6 * shown and described according to FIGS. 9 to 14 between the

Extensions 14 ^{* of} the conductive structures 11 of the rotor 3, this residual risk is completely excluded. Even in the switched-off state of the dispersion device 1, there is no unwanted inflow of fluid F into the powder feed 6 ^* in this embodiment. The invention has been described with reference to a preferred embodiment. However, it will be apparent to those skilled in the art that modifications or changes may be made to the invention without departing from the scope of the following claims.

Bezuaszeichenliste

1 dispersion device

2 drive shaft

3 rotor

4 mechanical seal

5 process enclosures

6 powder feed / supply line

7 fluid supply / supply line

8 product outlet / drain

9 storage

10 rotor core

11 lead structure

12 first subarea

13 second subarea

14 axial extension

15 opening

16 recording

20 end area

21 powder outlet opening

A distance

AB exit area

AM work mode

D dispersion / dispersion product EB immersion range

F fluid

L longitudinal axis

P powder

R rotation axis

S cleft

Q cross-sectional area

Claims

claims

1. Device (1) for dispersing at least one substance (P) in a fluid (F) comprising a process housing (5) with rotor (3), a fluid supply (7), a supply line (6) for the at least one substance to be dispersed with at least one outlet opening (21), and a product outlet (8), wherein by the rotor (3) at least partially an axial delivery of a supplied fluid (F) can be generated and wherein at least in regions by the rotor (3) a radial delivery of the supplied Fluids (F) can be generated.

2. Device (1) according to claim 1, wherein the rotor (3) comprises at least one first means for generating the at least regional axial promotion and wherein the rotor (3) comprises at least one second means for generating the at least regional radial promotion.

3. Device (1) according to claim 1 or 2, wherein the supply line (6) for the

dispersing substance is at least partially enclosed by the rotor (3) and wherein the at least one outlet opening (21) in a region of the rotor (3) is arranged, in which the fluid (F) is axially conveyed.

4. Device (1) according to any one of the preceding claims, wherein the rotor (3) has guide structures (11) for generating the axial conveying effect and wherein by broadening a rotor cross-section (Q) and / or by a rotation of the rotor (3) a radial conveying effect can be generated.

5. Device (1) according to claim 4, wherein the guide structures (11) on the of

Feed line (6) for the substance to be dispersed facing side of the rotor (3) are formed and wherein at least one of the conductive structures (11) via a solid core (10) of the rotor (3) axially in the direction of the feed line (6) for dispersing substance is extended, in particular wherein the at least one outlet opening (21) of the feed line (6) for the

dispersing substance is at least partially enclosed by the at least one elongated conductive structure (11).

A device (1) according to claim 5, wherein the number of elongated lead structures is variable with respect to the number of total lead structures.

7. Device (1) according to claim 5 or 6, wherein the supply line (6) for the

dispersing substance has a first longitudinal axis (L6) and wherein the rotor (3) is rotatably mounted about an axis of rotation (R), wherein the

Longitudinal axis (L6) of the feed line (6) for the substance to be dispersed and the axis of rotation (R) of the rotor (3) are coaxially or parallel aligned and wherein an outlet opening (21) of the feed line (6) for the substance to be dispersed in alignment with the the longitudinal axis (L6 *) of the feed line (6 ^* ) for the substance to be dispersed and the axis of rotation (R) of the rotor (3) are arranged at a defined angle (a) to each other.

8. Device (1) according to one of the preceding claims, wherein the

Fluid supply (7) is arranged substantially orthogonal to the supply line (6) for the substance to be dispersed or wherein the fluid supply (7) is arranged at an angle between 0 degrees and 90 degrees to the feed line (6) for the substance to be dispersed.

9. Device (1) according to any one of claims 7 or 8, wherein the fluid supply (7) has a second longitudinal axis, which is arranged orthogonal or at an angle to the first longitudinal axis (L6) of the feed line (6) for the substance to be dispersed and wherein the fluid supply (7) is arranged at a distance from the rotor (3), so that filled fluid (F) at least partially flows around the supply line (6) for the substance to be dispersed.

10. Device (1) according to claim 9, wherein the fluid (F) by means of

Guide structures (11) of the rotor (3) and the centrifugal forces occurring during the rotation of the rotor (3) from a center of the rotor (3) can be conducted to the outside.

11. Device (1) according to one of the preceding claims, wherein the

Supply line (6) for the substance to be dispersed is axially adjustable, in particular wherein the feed line (6) for the substance to be dispersed parallel to the axis of rotation (R) of the rotor is displaceable.

12. Device (1) according to one of claims 5 to 1 1, wherein the immersion depth of an end region (20) of the feed line (6) for the substance to be dispersed, in particular the immersion depth of the at least one outlet opening (21) comprehensive end region (20). , in the extended guide structures (11) of the rotor (3) is adjustable.

13. Device (1) according to one of claims 5 to 12, wherein between the

extended guide structures (11) of the rotor (3) and the feed line (6) for the substance to be dispersed, a radial distance is formed, in particular a radial distance between 0.1 mm and 10mm.

14. A method for dispersing at least one substance (P) in a fluid (F), in particular in a liquid, by means of a device (1) comprising a process housing (5) with rotor (3), a fluid supply (7), a supply line ( 6) for the at least one substance to be dispersed with at least one outlet opening (21), and a product outlet (8), the rotor (3) at least partially axially conveying a supplied fluid (F) causes and wherein the rotor (3) at least partially radial

Promotion of the supplied fluid (F) causes.

15. A process for dispersing at least one substance (P) in a fluid (F) according to claim 14 with a device (1) according to one of claims 1 to 13.