EP1475143A2 - Apparatus for dispersing or homogenising - Google Patents

Abstract

Device for dispersing and/or homogenizing comprises a pump (7) arranged in the feed direction of the material at a distance from a dispersing and/or homogenizing tool (2) and in front of the opening (6) of a feed line (5). The pumping pressure of the pump is lower in the region of the opening of the feed line than the suction pressure of the dispersing and/or homogenizing tool.

Description

The invention relates to a device for Dispersing and / or homogenizing with a Dispersing and / or homogenizing tool, in which a pumpable substance or a pumpable Mixture mixed with at least one additive is, wherein the pumpable substance or the like from a container, in particular from a Container or from a pipe, the dispersing and / or Homogenisierwerkzeug is zuluhrbar and for the additive or additives a supply line is provided in the supply of the pumpable material opens in front of the tool, wherein the supply line and the supply line at least in Area of the mouth are concentric with each other.

A structurally comparable device is made DE 196 29 945 A1 and has proven itself. But it is centrally a dry matter or free-flowing solid and from the side fed concentrically liquid and from it first with the help of mixing tools pumpable mixture formed in this form the dispersing and / or homogenizing tool is forwarded.

If, however, a pumpable substance in particular with high Viscosity an additive supplied and mixed exists the risk that the suction effect of the dispersing and / or Homogenisierwerkzeugs despite possibly provided Pumping blade is insufficient to the pumpable substance suck in and at the same time a sufficiently high suction power also to produce the additive (s) be sucked in accordance to both substances together by the Dispersing and / or Homogenisierwerkzeug promote can.

There is therefore the task of a device of the above to create this type, with which also high-quality materials Viscosity processed with sufficient flowability and with additives by homogenizing and / or dispersing can be mixed.

It can with a high viscosity material with sufficient fluidity, for example, a cream, a Tooth gel or a substance with a honey-like consistency be understood.

To achieve the above object, the above defined device characterized in that in Feeding direction of the substance at a distance before the dispersing and / or Homogenizing tool and in front of the mouth of the Supply line is arranged at least one pump whose Pump pressure in the flow direction in the area of the mouth of the Feed less than the suction pressure of the dispersing and / or Homogenizing tool is.

In this way it is achieved that the pump or flowable substance before the access of the additive (s) a pumping action is exposed by a pump, so that this substance despite its relatively high viscosity the Dispersing or Homogenisierwerkzeug, in the following also briefly Called "homogenizer", is fed without his Flow breaks off. Nevertheless, from the or the Feeding a respective additive sucked and be entrained and thereby get into the homogenizer. Thus, in the required place, the suction effect of Homogenizer be effective without the pumpable substance to suck in completely. By the pump will ensured that this pumpable substance despite his high viscosity up to the range of suction of the Homogenizer passes or this suction effect supports, so that also the additive (s) taken along, then dispersed together and / or to be homogenized.

An embodiment of the invention of quite considerable, under Circumstances may even have their own worthy significance in it exist that in the supply of the pumpable substance of the pump to the mouth of the supply line means for Change or reduce the cross section of this supply line is arranged. This allows the device to be pumped Substances of different viscosities or possibly Be adapted substances whose viscosity is during the Editing changes when, for example, a part of the diverted pumpable material and into the container returned and then again through the pump and the Feed line is transported. Furthermore, the viscosity can when starting the device and thus during a appropriate process change, for example, if to and after certain thickening or diluting the pump and Flowable material, for example, before entering the Pump are added, that is the means for Change or reduce the cross section of the supply line especially in a startup phase of the device or performed by this device Process be helpful.

Furthermore, by additives, the result behind the Homogenizer in its viscosity fluctuate, so too therefore a throttling or enlargement of the Cross section of the supply line and thus the amount of pumpable material may be appropriate to a desired To be able to adjust the final result.

Finally, this possibility of change or Reduction of the cross section of the supply line advantageous, because thereby the device for starting materials different Viscosities is applicable and to these different Viscosities of different substances each optimal can be adjusted.

A further embodiment of the invention can therein exist that the device for changing the cross section the supply line is designed as a shut-off device and that between the pump and the means for changing the Cross-section of the supply line, in particular a return line is branched into the container.

Thus, the supply line can not only in its cross section changed, but also closed completely. there This is especially useful if the pumpable and flowable substance from the container back into this be pumped back to, for example, this substance, which may contain several components, initially better Premix before being fed to the homogenizer and before entering the homogenizer with one or more Additives is brought together. In addition, this one has Arrangement with a shut-off device and at least one Return line the advantage that the device is good can be cleaned by using the pump pumped corresponding cleaning fluid and in the Container as high as possible or even over there provided spray heads is initiated.

For a favorable constructive solution it is special advantageous when the pump or the pump impeller on the the same wave as the dispersing and / or homogenizing tool is arranged and if between the pressure-side Pump chamber and the shaft as well as the concentric in particular arranged within the feed line for the supply line Additive to a shaft acting on this seal is arranged, which the pressure part of the pump of the Suction area of the additive in the supply line separates. For the pump and the homogenizer in this way only one only drive motor needed. At the same time it will be ensured that the entry of the additive in the pumpable Fabric as evenly as possible.

It is expedient if the concentric with each other arranged supply line and supply also concentric to the sealed by passing shaft for the pump and the Dispersing and / or homogenizing tool is arranged. It thus arise in the area of the concentric course of Feed line and supply line in their cross-section annular Channels for the pumpable substance and the one or the other Additives, whereby by the innermost ring the corresponding sealed and shielded shaft from the homogenizer too the pump runs. This also leads to a compact space-saving arrangement.

In the conveying direction behind the dispersing and / or Homogenizing tool may be provided an outlet line in particular, in the container in front of the pump can be traced back. This makes it possible for the Starting material from the container gradually more and more with mixed with one or more additives and over again is returned until a desired total mixture is made, which also has a corresponding degree Has homogeneity.

In addition to or preferably in the container recirculating outlet line may be a filling line or Filling fitting to be provided, which has a fitting, For example, a three-way cock, with the outlet and Return line can be connected.

So to dissipate the result coming from the homogenizer to be able to own a filling line or filling fitting or preferably one to the already mentioned, in the container return line provided branch as Be provided filling line or filling fitting, the in the latter case then for example via a two-way cock optionally can be opened or locked off, if one Returning the mixture is desired in the container.

The outlet pipe can be located in the directly behind the pump Outgoing return line open and at the mouth can be a Shut-off valve, in particular in the form of a three-way stopcock be arranged. Thus, a part of the return line both for returning the pumpable material before his Entry into the homogenizer as well as with one Add additive mixed and homogenized substance serve.

The suction effect of the dispersing and / or homogenizing tool can by at least one in the conveying direction behind this tool and / or at the entrance to this tool arranged and in particular connected to the tool Be reinforced pump impeller. This is especially true of Advantage, if the pumpable substance and / or the additives have a high viscosity.

In the conveying direction before the pump can in the container at least one stirring tool be arranged. This allows the Premix of the pumpable and flowable substance, often itself already a mixture of several components, before the Entry into the pump can be improved.

For a good conveying effect of the substance or substances higher Viscosity, it is useful if the container is vertical above the pump and the pump vertically above the Dispersing and / or homogenizing tool are arranged and if the supply line and the supply line in the area before the dispersing and / or homogenizing tool, ie especially in the area of their concentric arrangement, downwards. Thus, the promotion of frequent highly viscous substances supported by gravity.

The feed line for the additive may be before her Concentric to the supply line arranged side be a leader in this field. Thus, this can Supply line to the container as close as possible, with vertical Arrangement as close as possible below the container to her run concentric area.

The mouth of the supply line in the supply line can on Entry into the dispersing and / or homogenizing tool be provided. The closer the mouth to the homogenizer is arranged, the more effective is its suction effect.

The dispersing and / or homogenizing tool may be a rotor-stator device in particular with several rotor sprockets and / or stator rings in concentric arrangement to each other. A correspondingly intensive homogenizing effect is possible.

Especially when combining one or more of the above features and measures results in a Device used separately or in piping can be installed. It can be beneficial in mixed and Emulsifying plants are used and preferably one Mixing tank with central floor drain, which has to the Pump leads. In this case, an external circulation line, the in the bottom outlet is led out of the container and laterally into a riser in the upper part of the Recycle vessel and enhance the mixing action a good cleaning can be used. The arrangement of the Homogenizing and / or dispersing in one Circulation line, which leads back into the container allows a more effective and intensive dispersion or Homogenization of the mix and allows additional Functions such as pumping and, above all, circulating the mixed material and later a cleaning medium.

Fig. 1

eine teilweise im Längsschnitt gehaltene Seitenansicht einer erfindungsgemäßen Vorrichtung zum Dispergieren und/oder Homogenisieren mit einem als Behälter ausgebildeten Behältnis mit Bodenablass unter welchem eine Pumpe auf der selben Welle wie ein demgegenüber tiefer liegendes Dispergier- und/oder Homogenisierwerkzeug angeordnet ist, wobei zwischen dem Pumpenlaufrad und dem Dispergier- und/oder Homogenisierwerkzeug eine Zuführleitung für Zusatzstoffe konzentrisch zu der Zuleitung von der Pumpe zu dem Werkzeug verläuft, sowie

Fig. 2

in vergrößertem Maßstab einen Längsschnitt durch den Bodenbereich des Behälters, die darunter befindliche Pumpe, die Zuleitung von der Pumpe zu dem Dispergier- und Homogenisierwerkzeug mit der in diesem Bereich konzentrisch angeordneten Zuführleitung für einen Zusatzstoff, wobei der in Fig. 1 deutlicher dargestellte, aus Motor und Getriebe bestehende Antrieb der gemeinsamen Welle für Dispergier- und Homogenisierwerkzeug und Pumpe schematisiert angedeutet ist.

An embodiment of the invention will be described in more detail below with reference to the drawing. It shows in partly schematized representation:

Fig. 1

a partially longitudinally sectioned side view of a device according to the invention for dispersing and / or homogenizing with a container designed as a container with bottom outlet under which a pump on the same shaft as a contrast deeper lying dispersing and / or homogenizing tool is arranged, wherein between the pump impeller and the dispersing and / or homogenizing tool a supply line for additives concentric with the supply line from the pump to the tool, and

Fig. 2

on an enlarged scale a longitudinal section through the bottom portion of the container, the pump below it, the supply from the pump to the dispersing and homogenizing tool with the supply line for an additive concentrically arranged in this area, the more clearly shown in Fig. 1, from motor and gear existing drive the common shaft for dispersing and homogenizing tool and pump is indicated schematically.

A designated as a whole with 1 device is used for Dispersing and / or homogenizing and suggests to do so all recognizable in Figure 2 dispersing and / or homogenizing 2, hereinafter also "homogenizer" 2 or optionally called "tool" 2, on. With this Homogenizer 2 can be a pumpable and flowable substance or a corresponding pumpable mixture with at least one additive are mixed.

For this purpose, the pumpable substance is a container, in the embodiment of a container 3, according to Fig.1 and 2 can also be double-walled, at least in some areas, the homogenizer 2 via a supply line 4, the Embodiment at least partially a pumping chamber is, zuleitbar. For the additive (s) is a Supply line 5 is provided in the supply line 4 before the Tool 2 opens, the supply line 5 and the Feed line 4 at least in the area of the mouth 6 and in front run concentric to each other. This arrangement detects one particularly clear in Fig.2.

In the feed direction of the substance at a distance before the dispersing and / or Homogenizing 2 and before the mouth 6 of the concentric portion 5a of the supply line 5 is a pump 7 arranged, the impeller especially in Fig.2 clearly below a bottom outlet 8a of the container 3 can be seen. The downward in the exemplary embodiment pump pressure in Flow direction is in the region of the mouth 6 of Feed line 5 less than the suction pressure of the dispersing and / or Homogenizing tool 2, so even at high Viscosity of the flow of the substance not in front of this mouth 6 can tear off, that is by this measure is ensured that at the mouth 6 from the container. 3 coming material even at high viscosity in a desired Quantity flows to order with an appropriate amount of Add together and then mixed and / or to be homogenized.

In the supply line 4 of the pumpable substance can be seen between the pump 7 and the mouth 6 a means for Change or reduce the cross section of this supply line 4, which in the embodiment as a shut-8 is formed, so that by this shut-off. 8 either with only a partial actuation the amount of pumped substance throttled or the flow completely can be shut off.

Furthermore, between the pump 7 and this device for Change of the cross section or shut-off device 8 a Return line 9 diverted, the according to Figure 1 in the Container or the container 3 returns and a Pumping over its contents or cleaning fluid allowed. Pumping over can be particularly useful if this flowable substance contains additives in front or inside of the container 3 to be added before he then with the Additive is mixed and homogenized.

Furthermore, this shut-off device 8 allows an adaptation different viscosities of this substance, either can occur during the process itself or else must be taken into account when using the device 1 successively different substances are treated.

Especially in Figure 2 can be seen clearly that the pump. 7 or your pump impeller on the same shaft 10 as that Dispersing and / or homogenizing tool 2 is arranged, so that only a single drive 11, for example, the in Figure 1 shown engine 12 with belt drive 13, required is. Between the pressure-side pump chamber, the immediate in the region of the pump 7 located part of the supply line 4, and the shaft 10 and arranged within the feed line 4 Feed line 5 and its concentric with the feed line. 4 arranged region 5a is a shaft 10 acting on Seal 14 is arranged, which is the pressure part of the Pump 7 from the suction area in the supply line 5 and the Mouth 6 separates. Thus, the one shown in the drawing compact design possible.

The concentrically arranged supply line 4 and Feed line 5 with its area 5a are also concentric with the sealed shaft passing through 10 arranged and by a shaft enclosing shaft sleeve 15 separated from this.

In the conveying direction behind the homogenizer 2 is a Outlet line 16 is provided, the course mainly in Fig.1 is shown. In this embodiment, the Outlet line 16 in the manner to be described in the Container 3 returned before the pump 7. It is at the in the container 3 recirculating outlet 16 a Filling line 17 provided with filling fitting 18, so that about this armature 18, for example, a three-way cock, the Filling line 17 with the outlet or return line. 9 connected, which in still to be described manner with the Outlet line 16 is connected or this to a Part forms.

It can be seen in Fig.1 that the outlet 16 in the immediately behind the pump 7 outgoing return line 9 opens and at the mouth of a shut-off valve 19 in the form a three-way cock is arranged so that from this Shut-off 19, the return line 9 and the outlet 16 are a common line leading to the Filling line 17 on the one hand and in the container. 3 on the other hand leads.

It can not only the substance from the container 3 on the Line 9 can be pumped, but it can also be in the Homogenizer 2 made mixture either bottled or also be pumped one or more times to the Concentration of Zuführstoffes in the final product too enlarge.

The for the uniform feeding of the substance and the Additive important suction effect of the dispersing and / or Homogenizing 2 is in the embodiment by one in the conveying direction behind this tool 2 and an am Input in this tool 2 arranged pump blades 20 and 21 reinforced.

Furthermore, it can be seen in the conveying direction before the pump 7 and its impeller in the container in the area of Soil drainage 8a a stirring tool 22, whereby the substance in front the entry into the pump 7 can be premixed if he in turn consists of several components.

The container or the container 3 is located vertically above the pump 7 and the pump 7 is located in turn vertically above the homogenizer 2, so that the Feed line 4 and the concentric region 5a of the feed line 5 in the area before the homogenizer 2 down are directed so that the carriage of the substance to the Homogenizer 2 is supported by gravity what especially advantageous for substances of high viscosity.

The supply 5 is in front of her concentric to the Feed line 4 arranged region 5a laterally to this Area 5a leading trained, so that they save space can run below the container 3. In Fig.1 one recognizes a filling or metering funnel 23, through which an additive can be introduced into the supply line 5.

The mouth 6 of the supply line 5 and their concentric region 5a in the supply line 4 is immediate at the entrance to the dispersing and / or homogenizing tool 2 provided in order to make the best possible use of its suction. This dispersing and / or homogenizing tool 2 is included a rotor-stator device with multiple rotor sprockets and Stator sprockets in concentric arrangement to correspondingly to work effectively.

With the stirring tool 22 can in the lower part of the Mixing tank 3 turbulence can be generated, so that a Sedimentation of mix is avoided. At the same time This makes it possible to edit even small ones Given quantities. Such processing of small quantities is particularly advantageous in conjunction with a conical designed containers and circulation lines that the Mixture also deeper than shown in Figure 1, the Can bring mixing container again. With the help of the line 9 is a pumping of the mix without shear, so without Use of the homogenizer 2 but also with shear, so after passing through the homogenizer 2 possible. It can possibly by changing the speed another Effect can be achieved. Furthermore, a cleaning fluid be pumped to the individual components of the To be able to clean device 1.

For pumping without using the homogenizer is the Shut-off 8 closed.

If this shut-off device 8 is only partially closed and used as a throttle, which is coming from the pump 7 Flow rate throttled. You can do the throttling like that Choose the pumping action or the suction effect of the subsequent homogenizer greater than that of the pump. 7 becomes. This creates a negative pressure between the homogenizer 2 and pump 7, which then at the inlet for the additive is applied. By opening a provided there valve 24 can the additive is sucked out of the feed hopper 23, which are liquid or powdery substances can act. Apply vacuum or vacuum on Mixing tank 3 is not required, but can the Further improve suction performance.

The device 1 has a dispersing and / or Homogenizing 2 and on the same shaft 10 a pump 7, whereby a pumpable substance from a container, in particular a container 3 or a pipe, the Dispersing and / or homogenizing 2 is zulistbar. This substance can be used in the dispersing and homogenizing tool 2 are mixed with an additive by a Feed line 5 and a concentric to the feed line. 4 arranged area 5a to a mouth 6 in front of the Dispersing and homogenizing 2 passes. With Distance before the mouth 6 and before the dispersing and Homogenizing 2 arranged pump 7 has in Flow direction, a pump pressure in the range of this Mouth 6 is lower than the suction pressure of the tool 2. In this case, to influence this pressure in the supply line. 4 a device for changing or reducing the Cross section of this supply line 4, that is arranged a throttle be, which is preferably designed as a shut-off device 8, to complete the supply line 4 completely.

Claims (14)

Device (1) for dispersing and / or homogenizing with a dispersing and / or homogenizing tool (2) in which a pumpable substance or a pumpable mixture is mixed with at least one additive, wherein the pumpable substance or the like from a container, in particular from a container (3) or from a tube to which the dispersing and / or homogenizing tool (2) can be fed and for which the additives or a supply line (5) is provided, which in the supply line (4) of the pumpable material in front of the tool ( 2), wherein the feed line (5) and the feed line (4) are concentric with each other at least in the region of the mouth (6), characterized in that in the feed direction of the substance at a distance in front of the dispersing and / or homogenizing tool (2) and at least one pump (7) is arranged in front of the mouth (6) of the feed line (5), the pump pressure of which in the flow direction in the region of the mouth (6) of the feed line (5) being low r is the suction pressure of the dispersing and / or homogenizing tool (2). Apparatus according to claim 1, characterized in that in the supply line (4) of the pumpable material from the pump (7) to the mouth (6) of the supply line, a device for changing or reducing the cross section of this supply line is arranged. Apparatus according to claim 1 or 2, characterized in that the means for changing the cross section of the supply line as a shut-off device (8) is formed and that between the pump and the means for changing the cross section of the supply line, in particular a return line (9) the container (3 ) is branched off. Device according to one of claims 1 to 3, characterized in that the pump (7) or the pump impeller on the same shaft (10) as the dispersing and / or homogenizing tool (2) is arranged and that between the pressure-side pump chamber and the shaft and the concentric especially within the feed line (4) arranged feed line (5) for the additive a shaft (10) acting on this seal (14) is arranged, the pressure part of the pump (7) of the suction region of the additive in the feed line (5 ) separates. Device according to one of claims 1 to 4, characterized in that the concentrically arranged supply line (4) and supply line (5) are arranged concentrically to the sealed by passing through shaft (10) for the pump and the dispersing and / or homogenizing tool , Device according to one of claims 1 to 5, characterized in that in the conveying direction behind the dispersing and / or homogenizing an outlet line (16) is provided, which is in particular returned to the container in front of the pump (7). Device according to one of claims 1 to 6, characterized in that in addition to or preferably on the recirculating into the container outlet (16) a filling line (17) or filling fitting (18) is provided, which via a valve, for example a three-way cock, is connected to the outlet and return line. Device according to one of claims 1 to 7, characterized in that the outlet line (16) in the directly behind the pump (7) outgoing return line (9) opens and at the mouth of a shut-off valve (19) is arranged in particular in the form of a three-way cock. Device according to one of claims 1 to 8, characterized in that the suction effect of the dispersing and / or homogenizing tool (2) by at least one in the conveying direction behind this tool (2) and / or at the input to this tool (2) arranged pump blades ( 20, 21) is reinforced. Device according to one of claims 1 to 9, characterized in that in the conveying direction in front of the pump (7) in the container (3) at least one stirring tool (22) is arranged. Device according to one of claims 1 to 10, characterized in that the container (3) vertically above the pump (7) and the pump (7) vertically above the dispersing and / or homogenizing tool (2) are arranged and that the supply line ( 4) and the supply line (5) in the area in front of the dispersing and homogenizing tool (2) are directed downward. Device according to one of claims 1 to 11, characterized in that the feed line (5) for the additive in front of its concentric to the feed line (4) arranged region (5a) is formed laterally leading to this area (5a). Device according to one of claims 1 to 12, characterized in that the mouth (6) of the feed line (5, 5a) is provided in the feed line (4) at the inlet to the dispersing and / or homogenizing tool (2). Device according to one of claims 1 to 13, characterized in that the dispersing and / or homogenizing tool (2) is a rotor-stator device with in particular a plurality of rotor sprockets and / or stator sprockets in concentric arrangement with each other.

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