EP2179784A1 - Mixing and dosing system to manufacture a watery polymer dispersion solution in which the polymer dispersion mainly contains guar, and method - Google Patents

Mixing and dosing system to manufacture a watery polymer dispersion solution in which the polymer dispersion mainly contains guar, and method Download PDF

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Publication number
EP2179784A1
EP2179784A1 EP08167169A EP08167169A EP2179784A1 EP 2179784 A1 EP2179784 A1 EP 2179784A1 EP 08167169 A EP08167169 A EP 08167169A EP 08167169 A EP08167169 A EP 08167169A EP 2179784 A1 EP2179784 A1 EP 2179784A1
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EP
European Patent Office
Prior art keywords
polymer dispersion
injector
water
supply line
pressure
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Application number
EP08167169A
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German (de)
French (fr)
Inventor
Ulrich Ryfer
Rudolf Frischenknecht
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Polygal ag
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Polygal ag
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Priority to EP08167169A priority Critical patent/EP2179784A1/en
Publication of EP2179784A1 publication Critical patent/EP2179784A1/en
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    • 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
    • B01F23/51—Methods thereof
    • B01F23/511—Methods thereof characterised by the composition of the liquids or solids
    • 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
    • B01F23/59—Mixing systems, i.e. flow charts or diagrams
    • 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
    • B01F25/105—Mixing heads, i.e. compact mixing units or modules, using mixing valves for feeding and mixing at least two 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
    • B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • B01F35/717611—Peristaltic pumps

Definitions

  • the invention relates to a method for producing a solution, in particular a solution consisting of a polymer dispersion and water and a device for carrying out the method.
  • Water-soluble polymers often have a poor dissolving behavior, especially if they have a high molecular weight.
  • Polyacrylamides for example, represent a large group among the water-soluble polymers. Such acrylamide polymers are used predominantly in their high molecular weight, anionic, cationic or amphoteric copolymers in many areas of solid-liquid separation. Another important application is the paper industry.
  • a major dilution problem with water is that the aqueous polymer solution still contains gel components, i. H. there are undissolved polymers. Gel components not only cause a loss of effect of the polymer solution, but also lead to significant technical problems, such as clogged sieves or even a poorer quality of paper.
  • the polymer is not diluted with water, then a corresponding transport can take place, but through this corresponding force of its promotion, part of the polymer is degraded.
  • screw pumps are not suitable per se for promoting polymer dispersion, which have solid constituents of a certain size.
  • the densification of the polymer dispersion does not achieve the desired result of achieving a homogeneous solution. Rather, remain Dispersion parts in the pump, especially in the pre-chamber of the pump, which then inevitably lead to malfunction.
  • a solution When using a polymer dispersion, a solution must be provided without interference from the corresponding delivery container, which has a concentration of up to 1% of the polymer dispersion with water.
  • the core idea of the invention is to guide the polymer dispersion, which reacts very reactively to water, in a closed, homogeneous system to an injector which injects the polymer dispersion into the passing water. Subsequently, the reactive solution is fed to a booster pump over a very short distance.
  • the polymer dispersion stored in a container is guided in a homogeneous and closed system to an injector and injected there into a water jet passing past the injector.
  • the stored polymer dispersion is transported in a closed system to an injector and there injected a passing water jet, which is preferably performed in your pressure tube.
  • a passing water jet which is preferably performed in your pressure tube.
  • the inventive design it is not possible that water can penetrate into it, for example due to a backflow or because of too low flow velocity. It is therefore possible that the water-reactive polymer dispersion passes unchanged to the injector.
  • the injector itself is designed such that it has two input and one output region.
  • the first input area serves to guide the polymer dispersion, which is conveyed for example by a peristaltic pump, to the injector via preferably uniform raw cross sections. Only within the injector does this taper.
  • the taper is designed such that, furthermore, a laminar flow of the polymer dispersion is possible.
  • the second entrance area is intended for the access of the water. This is supplied by means of a pipe and a certain pressure to the injector. Through an opening in the tube in which the water is passed, the polymer dispersion is injected.
  • the exit area is provided to guide the injected polymer dispersion solution to a positive pressure pump.
  • this distance is to be kept short in their dimensions in order to prevent clogging due to a strong swelling of the polymer dispersion. Due to the flow of water past the actual injector, an additional negative pressure is created, which pulls the polymer dispersion out of the feed.
  • a further preferred embodiment provides that a compressed air line is introduced into the inlet of the polymer dispersion to the injector. This compressed air is used to start the process and to clean the device.
  • an overpressure container is provided in the piping system of the water, which brings the appropriate compensation.
  • Another advantage of the invention is that a peristaltic pump is used as metering pump for the polymer dispersion. This is low maintenance and particularly well suited for the dispersions, as due to the technical features of a peristaltic pump, the properties of a polymer dispersion are not or only slightly changed. High pressures, small cross sections and similar devices acting on the overall property of the polymer dispersion are thereby avoided.
  • a conventional inverting unit as known in the art, can not perform this function.
  • Another advantage is that due to the simple selection of the appropriate components, such as the peristaltic pump and the booster pump and the injector easier control is possible, so that level control and the like can be implemented in a simple manner.
  • a control system regulates the corresponding time sequences.
  • the control itself can be hydraulic, electrical or pneumatic.
  • the quantities to be dispensed are also defined via a control system.
  • the drawing shows a circuit diagram of the device according to the invention for carrying out the method according to the invention.
  • the device 1 consists essentially of a conveying region 2 for conveying the polymer dispersion provided in a container 3 and a conveying device 4 for transporting water (H 2 O) to an injector 5. Furthermore, the device 1 comprises a collecting container 6 serving therefor to pick up the solution, consisting of polymer dispersion and water, in order to be able to transfer it accordingly into another processing process.
  • the polymer dispersion provided in the container 3 is fed to a peristaltic pump 7, which is part of the conveyor 2 .
  • the supply takes place in such a way that the peristaltic pump 3rd generates a negative pressure and so sucks the polymer dispersion.
  • An additional level indicator 8 detects the amount of polymer dispersion stored in the container 3. Via a supply line 9, which is connected downstream of the peristaltic pump 3, the polymer dispersion is supplied to the injector 5.
  • a further supply line 10 which is part of the conveyor 4
  • water is supplied under pressure to the injector 5, so that within the injector 5, the bringing about of the solution is effected.
  • a pressure-increasing pump 11 adjoining the injector 5 effects the necessary shearing of the polymer dispersion mixed with water so that it can then be supplied to the collecting container 6 or optionally to a further, fourth supply line 13 via a third evacuating line 12, which is connected downstream from the booster pump 11 ,
  • the supply line 10 comprises a surge tank 17, which ensures that at any resulting overpressure, which is formed for example by an air cushion in the booster pump 11, water in the closed system, in particular consisting of the supply line 9, penetrates.
  • a controller 14 controls and controls the corresponding process.
  • the control can be done either electronically, pneumatically or hydraulically.
  • a pressure-conveying device 15 is connected to the supply line 9 via a blocking element 16.
  • the supply of compressed air via the pressure-conveying device 15 in the direction of the injector 5 take place or the pressure-conveying device 15 is out of the question Operation, so that only the polymer dispersion from the container 3 via the further supply line to the injector 5 is supplied.
  • the pressure-conveying device 15 has the effect that the injector 5 can be correspondingly cleaned as soon as the transport of the polymer dispersion has ended.
  • the cleaning is performed at the beginning of the corresponding process for providing a corresponding solution.
  • the method according to the invention provides that initially the supply line 9, starting from the container 3 up to the blocking element 16, is closed.
  • the pressure conveying device 15 generates compressed air and leads it via the open for the pressure line shut-off valve 16 to the injector 5.
  • the compressed air exits from the injector 5 and injected into the funded via the further supply line 10 water.
  • the blocking element 16 closes and polymer dispersion passes via the supply line 9 to the injector 5, while the water continues to flow in the further supply line 10.
  • the wetting of the polymer dispersion with water takes place directly in the injector 5 and in the short supply line to the booster pump 11.
  • the polymer dispersion solution is homogenized in a shearing process before it subsequently passes either via a laxative line 12 into the container 6 or via a further line 13, for example, to a machine.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The method involves quantity-based transportation of polymer dispersion to an injector (5) using a peristaltic pump (7). Water is injected into the transported polymer dispersion using the injector. Shearing of the polymer dispersion is performed in a booster pump (11). A pressurized conveying unit (15) is provided in an inlet (9) that extends from a polymer dispersion supply unit to the injector. The conveying unit flushes the injector before conveying the polymer dispersion. The conveying unit cleans the injector after conveying the polymer dispersion. An independent claim is also included for a device for dissolving polymer dispersion with water.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Lösung, insbesondere einer Lösung bestehend aus einer Polymerdispersion und Wasser sowie einer Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for producing a solution, in particular a solution consisting of a polymer dispersion and water and a device for carrying out the method.

Stand der TechnikState of the art

Wasserlösliche Polymere besitzen häufig ein schlechtes Löseverhalten, insbesondere auch dann, wenn sie ein hohes Molekulargewicht aufweisen. Polyacrylamide stellen beispielweise eine grosse Gruppe unter den wasserlöslichen Polymeren dar. Solche Acrylamidpolymerisate werden vorwiegend in ihrer hochmolekularen, anionischen, kationischen oder amphoteren Co-Polymere in vielen Bereichen der Fest-Flüssigtrennung eingesetzt. Eine weitere wichtige Anwendung ist auch der Bereich der Papierindustrie.Water-soluble polymers often have a poor dissolving behavior, especially if they have a high molecular weight. Polyacrylamides, for example, represent a large group among the water-soluble polymers. Such acrylamide polymers are used predominantly in their high molecular weight, anionic, cationic or amphoteric copolymers in many areas of solid-liquid separation. Another important application is the paper industry.

Die Überführung solcher hergestellten Polymere bis zu einer Mischstelle mit Wasser, wobei in der Regel solche Polymere in Containern bereit gestellt werden, geschieht in der Regel mittels Schneckenpumpen. Alternativ hierzu werden auch entsprechende Verdrängerpumpen verwendet. Eine Vermischung der Polyacrylamide mit Wasser findet in einer so genannten Invertiereinheit statt oder mit einem in der Polymerleitung angebrachten Rückschlagventil direkt in der Wasserleitung. Ferner sind aus dem Stand der Technik eine Vielzahl von speziell ausgebildeten Mischerpumpen bekannt.The conversion of such polymers produced up to a mixing point with water, which usually such polymers are provided in containers, is usually done by means of screw pumps. Alternatively, corresponding positive displacement pumps are used. A mixing of the polyacrylamides with water takes place in a so-called Inverting instead or with a mounted in the polymer line check valve directly in the water line. Furthermore, a large number of specially designed mixer pumps are known from the prior art.

Nachteile des Standes der TechnikDisadvantages of the prior art

Ein grosses Problem der Verdünnung mit Wasser besteht darin, dass die wässrigen Polymerlösung immer noch Gelanteile enthalten, d. h. es sind nicht gelöste Polymere vorhanden. Gelanteile bewirken nicht nur ein Wirkungsverlust der Polymerlösung, sondern führen auch zu erheblichen technischen Problemen, beispielsweise verstopfte Siebe oder aber auch eine schlechtere Qualität von Papier.A major dilution problem with water is that the aqueous polymer solution still contains gel components, i. H. there are undissolved polymers. Gel components not only cause a loss of effect of the polymer solution, but also lead to significant technical problems, such as clogged sieves or even a poorer quality of paper.

Wird das Polymer nicht mit Wasser verdünnt, so kann zwar ein entsprechender Transport stattfinden, aber durch diese entsprechende Gewalt seiner Förderung wird ein Teil des Polymers abgebaut.If the polymer is not diluted with water, then a corresponding transport can take place, but through this corresponding force of its promotion, part of the polymer is degraded.

Um möglichst gelfreie Polymerenlösung zu erhalten, sind gemäss dem Stand der Technik unterschiedliche Schersysteme bekannt. Diese haben jedoch neben der bereits beschriebenen Gelreduzierung auch einen unerwünschten Viskositätsabbau der Polymerenlösung zur Folge. Der Viskositätsabbau ist auf eine Reduzierung der Molekulargewichte der Polymere zurückzuführen und bewirkt eine verminderte Wirksamkeit.In order to obtain the most gel-free polymer solution, according to the prior art, different shearing systems are known. However, in addition to the gel reduction already described, these also result in an undesirable reduction in the viscosity of the polymer solution. The viscosity reduction is due to a reduction in the molecular weights of the polymers and causes a reduced efficiency.

Erfahrungen haben auch gezeigt, dass zur Förderung von Polymerdispersion, die Festbestandteile mit einer gewissen Grösse aufweisen, Schneckenpumpen an sich nicht geeignet sind. Durch die Verdichtung der Polymerdispersion wird nicht das gewünschte Ergebnis erzielt, eine homogene Lösung zu erreichen. Vielmehr verbleiben Dispersionsteile in der Pumpe, insbesondere in der Vorkammer der Pumpe, die dann unweigerlich zu Betriebsstörungen führen.Experience has also shown that screw pumps are not suitable per se for promoting polymer dispersion, which have solid constituents of a certain size. The densification of the polymer dispersion does not achieve the desired result of achieving a homogeneous solution. Rather, remain Dispersion parts in the pump, especially in the pre-chamber of the pump, which then inevitably lead to malfunction.

Problemstellung der ErfindungProblem of the invention

Bei der Verwendung einer Polymerdispersion muss störungsfrei ab dem entsprechenden Liefergebinde eine Lösung bereitgestellt werden, die eine bis zu 1 %-ige Konzentration der Polymerdispersion mit Wasser aufweist.When using a polymer dispersion, a solution must be provided without interference from the corresponding delivery container, which has a concentration of up to 1% of the polymer dispersion with water.

Lösung der AufgabeSolution of the task

Der Kerngedanke der Erfindung besteht darin, die Polymerdispersion, die sehr reaktiv auf Wasser reagiert, in einem geschlossenen homogenen System zu einem Injektor zu führen, der die Polymerdispersion in das vorbeiströmende Wasser injiziert. Anschliessend wird über eine sehr kurze Strecke die reaktive Lösung einer Druckerhöhungspumpe zugeführt.The core idea of the invention is to guide the polymer dispersion, which reacts very reactively to water, in a closed, homogeneous system to an injector which injects the polymer dispersion into the passing water. Subsequently, the reactive solution is fed to a booster pump over a very short distance.

Hierzu wird erfindungsgemäss vorgeschlagen, dass die in einem Behälter bevorratete Polymerdispersion in einem homogenen und geschlossenen System zu einem Injektor geführt wird und dort in einen an dem Injektor vorbeiführenden Wasserstrahl injiziert wird.For this purpose, it is proposed according to the invention that the polymer dispersion stored in a container is guided in a homogeneous and closed system to an injector and injected there into a water jet passing past the injector.

Vorteile der ErfindungAdvantages of the invention

Einer der wesentlichen Vorteile der Erfindung besteht darin, dass die bevorratete Polymerdispersion in einem geschlossenen System zu einem Injektor transportiert wird und dort einen vorbeiführenden Wasserstrahl, der vorzugsweise in deinem Druckrohr geführt ist, injiziert. Innerhalb des geschlossenen Systems ist es aufgrund der erfinderischen Ausgestaltung nicht möglich, dass Wasser, beispielsweise aufgrund eines Rückstaus oder wegen zu geringer Strömungsgeschwindigkeit in dieses eindringen kann. Daher ist es möglich, dass die auf Wasser reaktiv reagierende Polymerdispersion unverändert bis zum Injektor gelangt.One of the significant advantages of the invention is that the stored polymer dispersion is transported in a closed system to an injector and there injected a passing water jet, which is preferably performed in your pressure tube. Within the closed system it is due to the inventive design it is not possible that water can penetrate into it, for example due to a backflow or because of too low flow velocity. It is therefore possible that the water-reactive polymer dispersion passes unchanged to the injector.

Der Injektor selbst ist derart ausgestaltet, dass er zwei Eingangs- und einen Ausgangsbereich aufweist. Der erste Eingangsbereich dient dazu, die beispielsweise von einer Schlauchquetschpumpe geförderte Polymerdispersion über vorzugsweise gleichbleibende Rohquerschnitte zu dem Injektor zu führen. Erst innerhalb des Injektors verjüngt sich dieser. Die Verjüngung ist derart ausgebildet, dass weiterhin eine laminare Strömung der Polymerdispersion möglich ist. Der zweite Eingangsbereich ist für den Zugang des Wassers vorgesehen. Dieses wird mittels eines Rohres und eines bestimmten Druckes dem Injektor zugeführt. Durch eine Öffnung in dem Rohr, in dem das Wasser geführt wird, wird die Polymerdispersion injiziert. Der Ausgangsbereich ist vorgesehen, um die injizierte Polymerdispersionslösung zu einer Überdruckpumpe zu führen. Vorteilhafterweise ist diese Strecke in ihren Abmessungen kurz zu halten, zum zu verhindern, dass durch eine starke Quellung der Polymerdispersion eine Verstopfung eintritt. Aufgrund der Strömung des Wassers an dem eigentlichen Injektor vorbei, entsteht zusätzlich ein Unterdruck, der die Polymerdispersion aus dem Zulauf herauszieht.The injector itself is designed such that it has two input and one output region. The first input area serves to guide the polymer dispersion, which is conveyed for example by a peristaltic pump, to the injector via preferably uniform raw cross sections. Only within the injector does this taper. The taper is designed such that, furthermore, a laminar flow of the polymer dispersion is possible. The second entrance area is intended for the access of the water. This is supplied by means of a pipe and a certain pressure to the injector. Through an opening in the tube in which the water is passed, the polymer dispersion is injected. The exit area is provided to guide the injected polymer dispersion solution to a positive pressure pump. Advantageously, this distance is to be kept short in their dimensions in order to prevent clogging due to a strong swelling of the polymer dispersion. Due to the flow of water past the actual injector, an additional negative pressure is created, which pulls the polymer dispersion out of the feed.

Eine weitere bevorzugte Ausführung sieht vor, dass in den Zulauf der Polymerdispersion zu dem Injektor eine Druckluftleitung eingeführt ist. Diese Druckluft wird zum Anlaufen des Verfahrens und zum Reinigen der Vorrichtung.A further preferred embodiment provides that a compressed air line is introduced into the inlet of the polymer dispersion to the injector. This compressed air is used to start the process and to clean the device.

Bevor die Leitung, die von dem Container der Polymerdispersion zum Injektor führt, mit der Polymerdispersion beaufschlagt wird, wird zunächst Druckluft in das geschlossene System gegeben. Diese strömt in Richtung des Injektors, verjüngt sich dort und wird in das Wasser injiziert. Dadurch wird gewährleistet, dass das geschlossenen System trocken bleibt und kein Wasser durch den Injektor in das geschlossene System eindringen kann.Before the line, which leads from the container of the polymer dispersion to the injector, is charged with the polymer dispersion, compressed air is initially introduced into the closed system. This flows in the direction of the injector, tapers there and is injected into the water. This ensures that the closed system remains dry and no water can penetrate through the injector into the closed system.

Um zu verhindern, dass beispielsweise durch einen Druckstau in der dem Injektor nachfolgenden Druckerhöhungspumpe ein Rückschlag in das geschlossene System eintritt und dann doch das geschlossene System mit Wasser beaufschlagt wird, ist im dem Rohrleitungssystem des Wassers ein Überdruckbehälter vorgesehen, der den entsprechenden Ausgleich bringt.In order to prevent, for example, by a pressure accumulation in the injector subsequent pressure booster pump enters a setback in the closed system and then but the closed system is acted upon with water, an overpressure container is provided in the piping system of the water, which brings the appropriate compensation.

Ein weiterer Vorteil der Erfindung besteht darin, dass als Dosierpumpe für die Polymerdispersion eine Schlauchquetschpumpe eingesetzt wird. Diese ist wartungsarm und insbesondere für die Dispersionen hervorragend geeignet, da aufgrund der technischen Ausführungen einer Schlauchquetschpumpe die Eigenschaften einer Polymerdispersion nicht oder nur geringfügig verändert werden. Hohe Drücke, kleine Querschnitte und ähnliche auf die Gesamteigenschaft der Polymerdispersion wirkende Vorrichtungen werden dadurch vermieden.Another advantage of the invention is that a peristaltic pump is used as metering pump for the polymer dispersion. This is low maintenance and particularly well suited for the dispersions, as due to the technical features of a peristaltic pump, the properties of a polymer dispersion are not or only slightly changed. High pressures, small cross sections and similar devices acting on the overall property of the polymer dispersion are thereby avoided.

Eine übliche Invertiereinheit, wie es aus dem Stande der Technik bekannt ist, kann diese Funktion nicht erbringen.A conventional inverting unit, as known in the art, can not perform this function.

Ein weiterer Vorteil besteht darin, dass aufgrund der einfachen Auswahl der entsprechenden Komponenten, wie die Schlauchquetschpumpe und die Druckerhöhungspumpe sowie den Injektor eine einfachere Steuerung möglich ist, so dass Füllstandsregelung und ähnliches auf einfache Art und Weise umsetzbar sind.Another advantage is that due to the simple selection of the appropriate components, such as the peristaltic pump and the booster pump and the injector easier control is possible, so that level control and the like can be implemented in a simple manner.

Eine Steuerungsanlage regelt die entsprechenden zeitlichen Abläufe. Die Steuerung selbst kann hydraulischer, elektrischer oder pneumatischer Art sein. Auch die abzugebenen Mengen werden über eine Steuerungsanlage definiert.A control system regulates the corresponding time sequences. The control itself can be hydraulic, electrical or pneumatic. The quantities to be dispensed are also defined via a control system.

Weitere vorteilhafte Ausgestaltungen gehen aus der nachfolgenden Beschreibung, der Zeichnung oder den Ansprüchen hervor.Further advantageous embodiments will become apparent from the following description, the drawings or the claims.

Zeichnungdrawing

In der Zeichnung ist ein Schaltplan der erfindungsgemässen Vorrichtung zur Durchführung des erfindungsgemässen Verfahrens dargestellt.The drawing shows a circuit diagram of the device according to the invention for carrying out the method according to the invention.

Beschreibung eines AusführungsbeispielsDescription of an embodiment

Die erfindungsgemässe Vorrichtung 1 besteht im Wesentlichen aus einem Förderbereich 2 zur Förderung der in einem Container 3 bereitgestellten Polymerdispersion und einer Fördereinrichtung 4 zum Transport von Wasser (H2O) an einen Injektor 5. Ferner umfasst die Vorrichtung 1 einen Auffangbehälter 6, der dazu dient, die Lösung, bestehend aus Polymerdispersion und Wasser, aufzunehmen, um diese dann entsprechend in einen weiteren Bearbeitungsprozess übergeben zu können.The device 1 according to the invention consists essentially of a conveying region 2 for conveying the polymer dispersion provided in a container 3 and a conveying device 4 for transporting water (H 2 O) to an injector 5. Furthermore, the device 1 comprises a collecting container 6 serving therefor to pick up the solution, consisting of polymer dispersion and water, in order to be able to transfer it accordingly into another processing process.

Die in dem Container 3 bereit gestellte Polymerdispersion wird einer Schlauchquetschpumpe 7, die Teil der Fördereinrichtung 2 ist, zugeführt. Die Zuführung erfolgt auf die Weise, dass die Schlauchquetschpumpe 3 einen Unterdruck erzeugt und so die Polymerdispersion ansaugt. Ein zusätzlicher Füllstandsanzeiger 8 detektiert die im Container 3 bevorratete Menge an Polymerdispersion. Über eine Zuleitung 9, die der Schlauchquetschpumpe 3 nachgeschaltet ist, wird die Polymerdispersion dem Injektor 5 zugeführt.The polymer dispersion provided in the container 3 is fed to a peristaltic pump 7, which is part of the conveyor 2 . The supply takes place in such a way that the peristaltic pump 3rd generates a negative pressure and so sucks the polymer dispersion. An additional level indicator 8 detects the amount of polymer dispersion stored in the container 3. Via a supply line 9, which is connected downstream of the peristaltic pump 3, the polymer dispersion is supplied to the injector 5.

Über eine weitere Zuleitung 10, die Teil der Fördereinrichtung 4 ist, wird Wasser unter Druck dem Injektor 5 zugeführt, so dass innerhalb des Injektors 5 die Herbeiführung der Lösung bewirkt wird. Eine an dem Injektor 5 anschliessende Druckerhöhungspumpe 11 bewirkt die notwendige Scherung der mit Wasser versetzten Polymerdispersion, so dass diese dann über eine dritte abführende Leitung 12, die der Druckerhöhungspumpe 11 nachgeschaltet ist, dem Auffangbehälter 6 oder wahlweise einer weiteren, vierten Zuleitung 13 zugeführt werden kann.Via a further supply line 10, which is part of the conveyor 4, water is supplied under pressure to the injector 5, so that within the injector 5, the bringing about of the solution is effected. A pressure-increasing pump 11 adjoining the injector 5 effects the necessary shearing of the polymer dispersion mixed with water so that it can then be supplied to the collecting container 6 or optionally to a further, fourth supply line 13 via a third evacuating line 12, which is connected downstream from the booster pump 11 ,

Ferner umfasst die Zuleitung 10 einen Ausgleichsbehälter 17, der dafür Sorge trägt, dass bei etwaig entstehendem Überdruck, der beispielsweise durch ein Luftpolster in der Druckerhöhungspumpe 11 entsteht, Wasser in das geschlossene System, insbesondere bestehend aus der Zuleitung 9, eindringt.Further, the supply line 10 comprises a surge tank 17, which ensures that at any resulting overpressure, which is formed for example by an air cushion in the booster pump 11, water in the closed system, in particular consisting of the supply line 9, penetrates.

Eine Steuereinrichtung 14 regelt und steuert den entsprechenden Prozess. Die Steuerung kann entweder elektronisch, pneumatisch oder hydraulisch erfolgen.A controller 14 controls and controls the corresponding process. The control can be done either electronically, pneumatically or hydraulically.

Eine Druckförderungseinrichtung 15 ist an die Zuleitung 9 über ein Sperrelement 16 angeschlossen. Wahlweise kann entweder die Zuführung von Druckluft über die Druckförderungseinrichtung 15 in Richtung des Injektors 5 erfolgen oder die Druckförderungseinrichtung 15 ist ausser Betrieb, sodass ausschliesslich die Polymerdispersion von dem Container 3 über die weitere Zuleitung dem Injektor 5 zugeführt wird.A pressure-conveying device 15 is connected to the supply line 9 via a blocking element 16. Optionally, either the supply of compressed air via the pressure-conveying device 15 in the direction of the injector 5 take place or the pressure-conveying device 15 is out of the question Operation, so that only the polymer dispersion from the container 3 via the further supply line to the injector 5 is supplied.

Die Druckförderungseinrichtung 15 bewirkt, dass der Injektor 5 entsprechend gereinigt werden kann, sobald der Transport der Polymerdispersion beendet ist. Vorzugsweise wird auch die Reinigung zu Beginn des entsprechenden Prozess zur Bereitstellung einer entsprechenden Lösung durchgeführt.The pressure-conveying device 15 has the effect that the injector 5 can be correspondingly cleaned as soon as the transport of the polymer dispersion has ended. Preferably, the cleaning is performed at the beginning of the corresponding process for providing a corresponding solution.

Funktionsweise:Functionality:

Sind die Komponenten, wie Polymerdispersion, Wasser und Druckluft bereitgestellt, so sieht das erfindungsgemässe Verfahren vor, dass zunächst die Zuleitung 9 ausgehend von dem Container 3 bis hin zum Sperrelement 16 geschlossen ist. Die Druckfördereinrichtung 15 erzeugt Druckluft und führt diese über das für die Druckleitung geöffnete Sperrventil 16 zu dem Injektor 5. Die Druckluft tritt aus dem Injektor 5 aus und injiziert in das über die weitere Zuleitung 10 geförderte Wasser. Sobald das System gereinigt ist, schliesst das Sperrelement 16 und Polymerdispersion gelangt über die Zuleitung 9 zu dem Injektor 5, während das Wasser weiter in der weiteren Zuleitung 10 strömt.If the components, such as polymer dispersion, water and compressed air are provided, then the method according to the invention provides that initially the supply line 9, starting from the container 3 up to the blocking element 16, is closed. The pressure conveying device 15 generates compressed air and leads it via the open for the pressure line shut-off valve 16 to the injector 5. The compressed air exits from the injector 5 and injected into the funded via the further supply line 10 water. As soon as the system has been cleaned, the blocking element 16 closes and polymer dispersion passes via the supply line 9 to the injector 5, while the water continues to flow in the further supply line 10.

Die Benetzung der Polymerdispersion mit Wasser findet unmittelbar im Injektor 5 und in der kurzen Zuleitung zur Druckerhöhungspumpe 11 statt. In der Druckerhöhungspumpe 11 wird die Polymerdispersions-Lösung in einem Scherungsprozess homogenisiert, bevor diese darauffolgend wahlweise über eine abführende Leitung 12 in den Behälter 6 oder über eine weitere Leitung 13 beispielsweise zu einer Maschine gelangt.The wetting of the polymer dispersion with water takes place directly in the injector 5 and in the short supply line to the booster pump 11. In the booster pump 11, the polymer dispersion solution is homogenized in a shearing process before it subsequently passes either via a laxative line 12 into the container 6 or via a further line 13, for example, to a machine.

Entsteht während des Betriebs in der Druckerhöhungspunke 11 ein Luftpolster, so kann dies zu einem Rückschlag führen. Dies würde bedeuten, dass Wasser in das geschlossene System, nämlich in die Zuleitung 9 gelangen kann. Um dies zu verhindern, ist in der weiteren Zuleitung 10 ein Ausgleichsbehälter 17 vorgesehen, der diesen Überdruck kompensiert.If an air cushion is created during operation in the booster point 11, this can lead to a backlash. This would mean that water can enter the closed system, namely the supply line 9. To prevent this, a surge tank 17 is provided in the other supply line 10, which compensates for this pressure.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

  1. 1. Vorrichtung1. Device
  2. 2. Förderbereich2nd funding area
  3. 3. Container3. Container
  4. 4. Fördereinrichtung4. conveyor
  5. 5. Injektor5. Injector
  6. 6. Behälter6. container
  7. 7. Schlauchquetschpumpe7. Peristaltic pump
  8. 8. Füllstandsanzeiger8. Level indicator
  9. 9. Zuleitung9. Supply line
  10. 10. weitere Zuleitung10. further supply line
  11. 11. Druckerhöhungspumpe11. booster pump
  12. 12. abführende Leitung12. laxative line
  13. 13. weitere abführende Leitung13th further laxative line
  14. 14. Steuerung14. Control
  15. 15. Druckförderungseinrichtung15. Pressure-promoting device
  16. 16. Sperrelement16. blocking element
  17. 17. Ausgleichsbehälter17. Expansion tank

Claims (7)

Verfahren zur Herstellung einer wässrigen Polymerdispersions-Lösung, wobei die Polymerdispersion im wesentlichen Guar beinhaltet gekennzeichnet durch folgende Verfahrensschritte: a) Mengenmässig definierte Transportierung einer Polymerdispersion mittels einer Schlauchquetschpumpe (7) zu einem Injektor (5) b) Injizieren der transportierten Polymerdispersion Wasser durch den Injektor (5) c) Durchführung einer Scherung der mit Wasser vermischten Polymerdispersion in einer Druckerhöhungspumpe (11). A process for preparing an aqueous polymer dispersion solution, wherein the polymer dispersion contains substantially guar, characterized by the following process steps: a) Volume-defined transport of a polymer dispersion by means of a peristaltic pump (7) to an injector (5) b) Injecting the Transported Polymer Dispersion Water Through the Injector (5) c) performing a shear of the water-mixed polymer dispersion in a booster pump (11). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in einen Zulauf (9), der von der Bereitstellung der Polymerdispersion bis zum Injektor (5) verläuft, eine Druckfördereinrichtung (15) vorgesehen ist, die den Injektor (5) vor dem Fördern der Polymerdispersion spült und nach dem Fördern der Polymerdispersion reinigt.A method according to claim 1, characterized in that in an inlet (9), which extends from the provision of the polymer dispersion to the injector (5), a pressure conveying device (15) is provided, which flushes the injector (5) before conveying the polymer dispersion and cleans after conveying the polymer dispersion. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in einer weiteren Zuleitung (10), die für den Transport des Wassers vorgesehen ist, ein Ausgleichsbehälter (17) vorgesehen ist, um einen Druckausgleich herbeizuführen, der in dieser Zuleitung (10) oder in der Druckerhöhungspumpe (11) entstehen kann.A method according to claim 1 or 2, characterized in that in a further supply line (10), which is provided for the transport of the water, a surge tank (17) is provided to bring about pressure equalization in this supply line (10) or in the booster pump (11) may arise. Vorrichtung zum Lösen einer Polymerdispersion mit Wasser, wobei die Polymerdispersion zu einer Mischeinrichtung geführt wird, die ein Zulauf für Wasser aufweist, dadurch gekennzeichnet, dass die Zuführung mittels einer Schlauchquetschpumpe (7) erfolgt und die Mischeinrichtung ein Injektor (5) ist.Device for dissolving a polymer dispersion with water, wherein the polymer dispersion is conducted to a mixing device having a feed for water, characterized in that the supply by means of a peristaltic pump (7) and the mixing device is an injector (5). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass dem Injektor (5) eine Druckerhöhungspumpe (11) nachgeschaltet ist.Apparatus according to claim 4, characterized in that the injector (5) is followed by a pressure booster pump (11). Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass zwischen der Aufbereitung der Polymerdispersion und dem Injektor (5) eine Druckfördereinrichtung (15) vorgesehen ist, mittels der der Injektor (5) spülbar ist.Apparatus according to claim 4 or 5, characterized in that between the processing of the polymer dispersion and the injector (5) a pressure conveying device (15) is provided, by means of which the injector (5) is flushable. Vorrichtung nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass für den Zulauf des Wassers zum Injektor (5) eine weitere Zuleitung (10) vorgesehen und in der weiteren Zuleitung (10) ein Ausgleichsbehälter (17) angeordnet ist.Device according to one of claims 4 to 6, characterized in that for the inlet of the water to the injector (5) a further supply line (10) and in the further supply line (10) a surge tank (17) is arranged.
EP08167169A 2008-10-21 2008-10-21 Mixing and dosing system to manufacture a watery polymer dispersion solution in which the polymer dispersion mainly contains guar, and method Withdrawn EP2179784A1 (en)

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