CA2293689A1 - Device for disintegrating powdery materials - Google Patents
Device for disintegrating powdery materials Download PDFInfo
- Publication number
- CA2293689A1 CA2293689A1 CA002293689A CA2293689A CA2293689A1 CA 2293689 A1 CA2293689 A1 CA 2293689A1 CA 002293689 A CA002293689 A CA 002293689A CA 2293689 A CA2293689 A CA 2293689A CA 2293689 A1 CA2293689 A1 CA 2293689A1
- Authority
- CA
- Canada
- Prior art keywords
- dispersing device
- dispersing
- wetting unit
- dissolving
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
Abstract
The invention relates to a device for continuous disintegration of a hardly wettable powdery material in a liquid. Said device is fitted with a feeding device for the powdery material and a dispersing device arranged downstream, wherein an injector serving as a preparation unit and which is impinged upon by a hydraulic fluid is connected between the feeding device and the dispersing device. The invention enables easy and continuous preparation and prevents agglutinations in the areas that come into contact with the powder while reliably ensuring wetting and disintegration of individual powder particles.
Description
Device for solubilizinQ a_pulverulent substance The invention relates to a device for continu-ously solubilizing a pulverulent substance which is difficult to wet in a liquid, having a feed device for the pulverulent substance and having a dispersing device which is connected downstream of the feed device.
Devices of this nature, which can be used to place pulverulent substances which are difficult to solubilize, such as for example thickeners and stabiliz-ers, in a colloidal solution or dispersion, are known in principle. The standard systems used usually mean that the dry substances have to pass through the dispersing device a number of times in batches, and consequently their structure may be subjected to considerable stresses and even destroyed.
In addition, the prior art includes continuously operating devices which, in a continuous passage, wet or solubilize the pulverulent substances, but in this case pulverulent substances agglomerate at parts which come into contact, with them, thus interrupting the production process.
The invention is based on the object of providing a device for the continuous solubilizing of a pulverulent substance which is difficult to wet in a liquid, by means of which, in a simple manner, it is possible to operate continuously without any agglomeration at areas which come into contact with powder, while simultaneously achieving reliable wetting and solubilizing of each individual powder particle.
This object is achieved in accordance with the defining part of claim 1. The invention has the advantage that the pulverulent substance is prevented from agglo-merating in areas which come into contact with powder, in particular in the outlet area of the feed device, in the area in which it is sucked in, in the area/of contact between powder and liquid or in the dispersing chamber, where otherwise initial contact with the liquid presents _. a risk of the powder sticking together and agglomerating.
In this way, it is possible to operate continuously, or if desired in batches, without problems over an unlimited period. This prolongs the service life and means that it is no longer necessary to carry out cleaning work at regular, short intervals.
It is expedient for the outlet of the preliminary wetting unit to be guided tangentially into the disper-sing unit, since the resultant "turbulence" (radial flow) of the mixture entering the device avoids back-pressure and promotes the removal of the product.
A preferred refinement of the invention consists in the injector being provided with an adjustable nozzle in order to set different concentrations. This has the further advantage that the nozzle can initially be closed when liquid begins to be fed in, thus preventing blow-back of the liquid into the outlet of the feed device and avoiding the risk of agglomeration of powder.
In principle, in certain powders it is expedient, in order to achieve a maximum concentration, for the feed device to be arranged directly above the injector. On the other hand, in many applications it may be advantageous for the outlet of the feed device to be arranged below the inlet of the preliminary wetting unit and for a hose connection to be provided between them.
Very good results are achieved if the axis of rotation of the dispersing device is horizontally ori-ented and the longitudinal axis of the preliminary wetting unit runs vertically, the outlet of the prelimi-nary wetting unit opening vertically into the dispersing device. However, in principle the device also operates satisfactorily if the axis of rotation of the dispersing device is vertically oriented and the longitudinal axis of the preliminary wetting unit is horizontally or vertically oriented.
A preferred refinement of the invention consists in a pump being connected downstream of the dispersing device. Particularly in the case of high-viscosity ' CA 02293689 1999-10-22 products, this arrangement ensures that the product is removed in a particularly reliable manner. Moreover, blow-back of the liquid into the injector, resulting in blockage caused by swelling powder, is prevented in this way. Furthermore, the additional sucking action of the pump further increases the concentration. If a rotor with a pump action is present in the dispersing device, this rotor can be dispensed with under certain circumstances.
Anbther advantageous refinement of the invention consists in providing the dispersing device with at least one inlet for supplying diluting liquid and/or steam. In this way, it is possible to carry out continuous dilution ,._or setting to the desired product concentration. The supply of steam makes it possible to heat the solution in the dispersing device.
The invention is described in more detail below with reference to an exemplary embodiment which is illustrated in the drawing. The only figure diagram-matically depicts a cross section through the device according to the invention.
Via a funnel-shaped feed device 10, a pulverulent substance which is difficult to wet, for example a thickener such as xanthan, is sucked into a preliminary wetting unit 11 and, from there, passes into a dispersing device 12. In the example illustrated, an outlet 16 of ' CA 02293689 1999-10-22 the feed unit 10 is located below and next to an inlet 17 of the preliminary wetting unit 11. As an alternative, the outlet 16 may, for example, also be arranged next to or above the inlet 17. The connection between the two is produced by means of a hose connection 18. As an alter-native to the feed unit 10 illustrated, it is also possible to provide an automatic suction device.
The preliminary wetting unit 11 comprises an injector 13 with an adjustable nozzle 15. A pressurized liquid is introduced into the chamber of the injector via a radial feed opening 20. Due to the suction pressure which is generated, the liquid which flows out of the injector 13 via the nozzle 15 entrains the pulverulent substance, resulting in intensive wetting of the powder particles.
The outlet 14 of the preliminary wetting unit opens tangentially into the dispersing device 12, which is of cylindrical design. In the example illustrated, the dispersing device comprises a mixing chamber 23 with a rotor 22, comprising one or more gear rings 24 and internal pump vane 27, as well as a stator 28. The stator 28 comprises one or more gear rings. The gear rings of the rotor and of the stator are arranged concentrically inside one another. The product is forced to pass through the shearing system. As an alternative to the toothed ' CA 02293689 1999-10-22 rotor/stator system, it is also possible to use a system of deflecting surfaces (stator and/or rotor deflecting surfaces) or any other dispersing system (not shown). Via an outlet connection piece 25, the dispersed solution is guided out of the mincing chamber 23 in a tangential direction.
In addition, a diluting liquid and/or steam for heating the solution may be supplied at a further inlet 26.
In the example illustrated, the axis of rotation 21 of the pump wheel 22 is arranged horizontally and the longitudinal axis of the preliminary wetting unit 11 is ,.,arranged vertically.
Devices of this nature, which can be used to place pulverulent substances which are difficult to solubilize, such as for example thickeners and stabiliz-ers, in a colloidal solution or dispersion, are known in principle. The standard systems used usually mean that the dry substances have to pass through the dispersing device a number of times in batches, and consequently their structure may be subjected to considerable stresses and even destroyed.
In addition, the prior art includes continuously operating devices which, in a continuous passage, wet or solubilize the pulverulent substances, but in this case pulverulent substances agglomerate at parts which come into contact, with them, thus interrupting the production process.
The invention is based on the object of providing a device for the continuous solubilizing of a pulverulent substance which is difficult to wet in a liquid, by means of which, in a simple manner, it is possible to operate continuously without any agglomeration at areas which come into contact with powder, while simultaneously achieving reliable wetting and solubilizing of each individual powder particle.
This object is achieved in accordance with the defining part of claim 1. The invention has the advantage that the pulverulent substance is prevented from agglo-merating in areas which come into contact with powder, in particular in the outlet area of the feed device, in the area in which it is sucked in, in the area/of contact between powder and liquid or in the dispersing chamber, where otherwise initial contact with the liquid presents _. a risk of the powder sticking together and agglomerating.
In this way, it is possible to operate continuously, or if desired in batches, without problems over an unlimited period. This prolongs the service life and means that it is no longer necessary to carry out cleaning work at regular, short intervals.
It is expedient for the outlet of the preliminary wetting unit to be guided tangentially into the disper-sing unit, since the resultant "turbulence" (radial flow) of the mixture entering the device avoids back-pressure and promotes the removal of the product.
A preferred refinement of the invention consists in the injector being provided with an adjustable nozzle in order to set different concentrations. This has the further advantage that the nozzle can initially be closed when liquid begins to be fed in, thus preventing blow-back of the liquid into the outlet of the feed device and avoiding the risk of agglomeration of powder.
In principle, in certain powders it is expedient, in order to achieve a maximum concentration, for the feed device to be arranged directly above the injector. On the other hand, in many applications it may be advantageous for the outlet of the feed device to be arranged below the inlet of the preliminary wetting unit and for a hose connection to be provided between them.
Very good results are achieved if the axis of rotation of the dispersing device is horizontally ori-ented and the longitudinal axis of the preliminary wetting unit runs vertically, the outlet of the prelimi-nary wetting unit opening vertically into the dispersing device. However, in principle the device also operates satisfactorily if the axis of rotation of the dispersing device is vertically oriented and the longitudinal axis of the preliminary wetting unit is horizontally or vertically oriented.
A preferred refinement of the invention consists in a pump being connected downstream of the dispersing device. Particularly in the case of high-viscosity ' CA 02293689 1999-10-22 products, this arrangement ensures that the product is removed in a particularly reliable manner. Moreover, blow-back of the liquid into the injector, resulting in blockage caused by swelling powder, is prevented in this way. Furthermore, the additional sucking action of the pump further increases the concentration. If a rotor with a pump action is present in the dispersing device, this rotor can be dispensed with under certain circumstances.
Anbther advantageous refinement of the invention consists in providing the dispersing device with at least one inlet for supplying diluting liquid and/or steam. In this way, it is possible to carry out continuous dilution ,._or setting to the desired product concentration. The supply of steam makes it possible to heat the solution in the dispersing device.
The invention is described in more detail below with reference to an exemplary embodiment which is illustrated in the drawing. The only figure diagram-matically depicts a cross section through the device according to the invention.
Via a funnel-shaped feed device 10, a pulverulent substance which is difficult to wet, for example a thickener such as xanthan, is sucked into a preliminary wetting unit 11 and, from there, passes into a dispersing device 12. In the example illustrated, an outlet 16 of ' CA 02293689 1999-10-22 the feed unit 10 is located below and next to an inlet 17 of the preliminary wetting unit 11. As an alternative, the outlet 16 may, for example, also be arranged next to or above the inlet 17. The connection between the two is produced by means of a hose connection 18. As an alter-native to the feed unit 10 illustrated, it is also possible to provide an automatic suction device.
The preliminary wetting unit 11 comprises an injector 13 with an adjustable nozzle 15. A pressurized liquid is introduced into the chamber of the injector via a radial feed opening 20. Due to the suction pressure which is generated, the liquid which flows out of the injector 13 via the nozzle 15 entrains the pulverulent substance, resulting in intensive wetting of the powder particles.
The outlet 14 of the preliminary wetting unit opens tangentially into the dispersing device 12, which is of cylindrical design. In the example illustrated, the dispersing device comprises a mixing chamber 23 with a rotor 22, comprising one or more gear rings 24 and internal pump vane 27, as well as a stator 28. The stator 28 comprises one or more gear rings. The gear rings of the rotor and of the stator are arranged concentrically inside one another. The product is forced to pass through the shearing system. As an alternative to the toothed ' CA 02293689 1999-10-22 rotor/stator system, it is also possible to use a system of deflecting surfaces (stator and/or rotor deflecting surfaces) or any other dispersing system (not shown). Via an outlet connection piece 25, the dispersed solution is guided out of the mincing chamber 23 in a tangential direction.
In addition, a diluting liquid and/or steam for heating the solution may be supplied at a further inlet 26.
In the example illustrated, the axis of rotation 21 of the pump wheel 22 is arranged horizontally and the longitudinal axis of the preliminary wetting unit 11 is ,.,arranged vertically.
Claims (6)
1. A device for continuously solubilizing a pulverulent substance which is difficult to wet in a liquid, having a feed device (10) for the pulverulent substance and having a dispersing device with a pumping rotor (22), the dispersing device being connected downstream of the feed device, wherein an injector (13), to which pressurized liquid can be applied, is connected between the feed device (10) and the dispersing device (12), as a preliminary wetting unit (11), characterized in that the longitudinal axis of the preliminary wetting unit (11) is arranged vertically and the rotation axis of the rotor (22) is arranged horizontally, whereby the outlet (14) of the wetting unit (11) is guided vertically into the dispersing device (12).
2. The dissolving/dispersing device as claimed in claim 1, wherein the outlet (14) of the preliminary wetting unit (11) is guided tangentially into the dispersing device (12).
3. The dissolving/dispersing device as claimed in claim 1 or 2, wherein the injector (13) is provided with an adjustable nozzle (15) for adjusting the concentration as desired.
4. The dissolving/dispersing device as claimed in one of the preceding claims, wherein the outlet (16) of the feed device (10) is arranged below the inlet (17) of the preliminary wetting unit (11), and there is a hose connection (18) between them.
5. The dissolving/dispersing device as claimed in one of the preceding claims, wherein a pump is connected downstream of the dispersing device (22).
6. The dissolving/dispersing device as claimed in one of the preceding claims, wherein the dispersing device (12) is provided with at least one inlet (26) for supplying diluting liquid and/or steam.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19717161.3 | 1997-04-23 | ||
| DE19717161A DE19717161A1 (en) | 1997-04-23 | 1997-04-23 | Device for disintegrating a powdery substance |
| PCT/EP1998/002424 WO1998047609A1 (en) | 1997-04-23 | 1998-04-23 | Device for disintegrating powdery materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2293689A1 true CA2293689A1 (en) | 1998-10-29 |
Family
ID=7827506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002293689A Abandoned CA2293689A1 (en) | 1997-04-23 | 1998-04-23 | Device for disintegrating powdery materials |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0979139B1 (en) |
| AU (1) | AU7528698A (en) |
| CA (1) | CA2293689A1 (en) |
| DE (2) | DE19717161A1 (en) |
| WO (1) | WO1998047609A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1197260B1 (en) * | 2000-10-11 | 2004-09-01 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Apparatus for homogenizing flowable materials |
| EP1844849B1 (en) * | 2006-03-29 | 2010-12-01 | Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft | Apparatus for homogenising, mixing or dispersing of flowable media |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB280313A (en) * | 1926-09-01 | 1927-11-17 | Foamite Childs Corp | Improvements in or relating to apparatus for mixing powder with liquid |
| US3169751A (en) * | 1961-07-10 | 1965-02-16 | Morton Machine Company Ltd | Mixing or emulsifying machines |
| CH549405A (en) * | 1972-03-22 | 1974-05-31 | Nestle Sa | METHOD AND APPARATUS FOR THE CONTINUOUS DISSOLUTION OF A PULVERULENT MATERIAL IN A LIQUID. |
| IT1024318B (en) * | 1973-11-14 | 1978-06-20 | Dillumelt Srl | PROCESS FOR MESOOLAR IN A TINUOUS WAY A POWDER IN A LIQUID AND DEVICE FOR STARTING THE PROCESS |
| DE2657791A1 (en) * | 1976-12-21 | 1978-06-22 | Babcock Kina Ltd | Liq. jet mixing nozzle - has coaxial inlet and outlet tubes mounted in sleeve and pipe adjustably screwing together |
| DE2705501A1 (en) * | 1977-02-10 | 1978-08-17 | Upraton F J Zucker Kg | Mixer separator with pumped recycle - having conical blend vessel with spiral motion caused by recycle |
| US4421412A (en) * | 1978-12-20 | 1983-12-20 | Usm Corporation | Process and apparatus for processing plastic and polymeric materials |
| JPS62106829A (en) * | 1985-10-29 | 1987-05-18 | Funken:Kk | Continuous premixer |
-
1997
- 1997-04-23 DE DE19717161A patent/DE19717161A1/en not_active Ceased
-
1998
- 1998-04-23 WO PCT/EP1998/002424 patent/WO1998047609A1/en active IP Right Grant
- 1998-04-23 CA CA002293689A patent/CA2293689A1/en not_active Abandoned
- 1998-04-23 EP EP98922770A patent/EP0979139B1/en not_active Expired - Lifetime
- 1998-04-23 AU AU75286/98A patent/AU7528698A/en not_active Abandoned
- 1998-04-23 DE DE59804810T patent/DE59804810D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19717161A1 (en) | 1998-10-29 |
| EP0979139A1 (en) | 2000-02-16 |
| EP0979139B1 (en) | 2002-07-17 |
| AU7528698A (en) | 1998-11-13 |
| WO1998047609A1 (en) | 1998-10-29 |
| DE59804810D1 (en) | 2002-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |