EP1278593B1 - Static mixing element - Google Patents

Static mixing element Download PDF

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Publication number
EP1278593B1
EP1278593B1 EP01940350A EP01940350A EP1278593B1 EP 1278593 B1 EP1278593 B1 EP 1278593B1 EP 01940350 A EP01940350 A EP 01940350A EP 01940350 A EP01940350 A EP 01940350A EP 1278593 B1 EP1278593 B1 EP 1278593B1
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EP
European Patent Office
Prior art keywords
mixing
media
flow
static mixing
housing
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Expired - Lifetime
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EP01940350A
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German (de)
French (fr)
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EP1278593A1 (en
Inventor
Manfred Schauerte
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Tracto Technik GmbH and Co KG
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Tracto Technik GmbH and Co KG
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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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4334—Mixers with a converging cross-section
    • 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
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4521—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/834—Mixing in several steps, e.g. successive steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles

Definitions

  • the invention relates to the use of a static mixing element for Homogenizing and dispersing liquid, gaseous or powdered Media for producing a drilling fluid.
  • a Liquid with a powdery substance or a liquid or a Suspension, if necessary to facilitate and improve the drilling process for example, a bentonite-water suspension, as a drilling or rinsing fluid should be used.
  • a bentonite-water suspension keeps the cuttings in suspension, Lubricates the pipe string when it is pulled in and protects it after a certain curing phase against the surrounding soil.
  • To the variation of Property of the suspension may contain additives such as soda ash or polymers.
  • drilling fluids are stored in a separate storage tank by an agitator working in this tank, ie a dynamic one Mixer, or mixed by a fast running pump.
  • DE-PS687 926 shows the use of a static mixer which is based on perforated dividing walls, which run transversely to the flow direction, for the production of physical foam for fire fighting purposes.
  • US 4,313,680 A shows a static mixer with perpendicular to the flow direction arranged deflecting elements for mixing of different media with very short reaction time.
  • Japanese Laid-Open Patent 61-242 624 discloses an apparatus for producing an emulsion Water and oil, which has a static mixer.
  • US 4 514 095 A discloses a static mixer for fluids comprising a Mixing effect by diverting part streams from a core area into one Edge area and back reached.
  • US 4,370,062 A describes a mixing gun for mixing two-component adhesives, at the top of a static mixer with baffles sitting.
  • US 4 412 582 A describes a vertical arrangement of baffles in a heat exchanger through which, to improve heat transfer, the flowing fluid is added to turbulence.
  • US 4 854 721 A discloses a device for mixing drinks Concentrate and water, also perpendicular to the main flow direction having arranged deflecting plates.
  • US 5 522 661 A discloses a static mixer which is particularly applicable simple and inexpensive way to produce.
  • the deflection surfaces are arranged at an angle of 45 ° to the flow direction of the fluid.
  • DE 36 18 062 A1 describes a device for mixing pasty or gelatinous components, being from a central in one Mixing tube arranged axis extending in the radial direction guide walls, widening in the radial direction and at an angle to the flow direction of the fluid are arranged.
  • the adjacent guide walls of the a wing ring forming mixing insert overlap each other and have passages.
  • a drilling fluid is the addition medium, such as bentonite, the Water in powder form before or after one of the drilling fluid to the drilling rig forwarded to transporting hydraulic pump. Behind the pump can one be arranged static mixing section, which is the additive and the water homogenized.
  • a static mixer as he for example from "weighing + dosing" 3/1997 Page 23 to 26 is usually made of a plurality of diverse, successively connected individual mixing elements, with Help an adapter can be used in a supply or discharge system can.
  • Each of these mixing elements has one or more deflection surfaces which, if appropriate, pass through one or more passages become.
  • the one another either within a mixing element or in Downstream mixing elements following deflection surfaces are always there at small angles inclined to each other and also have regard to the Flow direction of the medium flowing in the conduit coinciding a small; from 90 ° different inclination angle.
  • the deflection surfaces facing each other and to the flow direction at a particular axis angle produce a forced guidance of the flow, so that it repeatedly rotates its flow direction.
  • the possibly passing through the deflection passages also extend at an angle to each other and to the deflection surfaces, so that both a division of the current and a multiple change of the flow direction takes place.
  • the individual streams are brought together again. This multiple splitting, diverting and merging of the media causes their homogenization or dispersion.
  • the geometry of the deflection surfaces and through holes as well their arrangement relative to each other and to the flow direction such be arranged to ensure as possible a lack of dead zones can be, because they prevent a homogeneous mixing.
  • a significant disadvantage of the known static mixer is that the in Complex geometry manufactured mixing elements in complex production processes have to be produced, which costs a considerable amount of time and money cause. Especially the sometimes massive design of the mixer with differently aligned passages makes a high cost of materials required.
  • the invention is therefore based on the object, a static mixer finding an efficient homogenizing and dispersing various Media for producing a drilling fluid with structurally simple It also makes mixing elements easy to manufacture and simple to be cleaned.
  • the object is achieved by the use of a mixing element with at least one deflection surface which is at an angle of 70 to 110 ° to the Main flow direction of the media aligned in the flowed line is for mixing and producing a drilling fluid, in particular a Bentonite-water suspension.
  • the invention is based on the idea that during the impact of the Media on the only slightly inclined to the flow direction deflection and the flow around their edges shear forces that cause the swirling and Mix the media.
  • the particular advantage of the mixing element according to the invention lies in its simple construction, which is manufactured inexpensively and without special machinery can be.
  • Another advantage is that due to the special orientation of the Deflection area no acute angle between the area and the surrounding Housing or the wall are present. This is the cleaning of the mixing element considerably relieved.
  • the deflection surface is in one Angle of 90 ° to the flow direction of the media arranged, i. she stands perpendicular to the flow direction.
  • the shape of the Cross-section of the deflection surface substantially to the cross-sectional contour of flowed through line correspond.
  • its diameter but smaller than that of the line, so that between the line and the Deflection at least one passage for the deflected from the deflection Medium arises.
  • the deflection surface can flow through fastening means directly to the flow Line or on a housing of a line to be used in the line Attached mixing element.
  • the housing of the mixing element can be designed in such a way that lying in the flow direction behind the deflection side surfaces of the housing can be used to guide the medium.
  • they can run in a funnel shape to become one on one Deflection of a downstream or in the same mixing system located Conveying leading constricting passage opening.
  • the deflection surface with Be provided openings that a division of the striking on the surface Enable mediums. This can improve the homogenization be reached, but without significantly cleaning the system is difficult.
  • the individual mixing elements can in a mixed system in a variety be switched one behind the other. It may also be advantageous, mixing elements parallel next to each other when e.g. the flow rate to be increased to media.
  • the mixing element used in the invention can for homogenizing and Mixing of gases, liquids, suspensions or dispersions used become. It can thus be used in a variety of different processes and Devices, e.g. from the fields of chemical or process engineering as well as in the plastics industry, water treatment or in the food industry Find use.
  • drilling fluids e.g. Bentonite-water suspensions
  • Bentonite-water suspensions be used, for example, for horizontal or Vertical holes are needed.
  • a single element 1 of the mixing system consists of a housing 2 with two Sloping surfaces 3 and 4, which are funnel-shaped to a through hole 5 narrow. They allow the passage of the arrow in the direction of the inlet opening 6 in the mixing system inflowing medium.
  • a mixing system of 3 individual elements with in each case one deflection surface and one head piece 12 and one end piece 17 composed. These are sealed by seals 20 against each other. This arrangement can be supplemented as desired by further mixing elements.
  • the head has an inlet opening 6, which on the first, as a component the head piece worked deflection opens.
  • the opening is funnel-shaped.
  • End piece 17 and head 12 are with threaded (not shown here), in the common pipe fittings can be screwed.
  • the media flow into the header 12 via the inlet opening 6 and bouncing on the deflection 9. There they are distracted and flow through the passages 11a, 11b, 11c in the mixing chamber 19. They are partially guided along the inclined surfaces 3 and 4. The media flow in the following through the passage opening 5 to a further deflection surface. They flow through a second mixing element in the manner just described.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Static mixer element for homogenizing media and methods of mixing a drilling liquid are disclosed. The static mixer includes a housing and a deflection surface arranged within the housing at a selected angle with respect to the flow direction.

Description

Die Erfindung betrifft die Verwendung eines statischen Mischelements zum Homogenisieren und Dispergieren flüssiger, gasförmiger oder pulverförmiger Medien zum Herstellen einer Bohrflüssigkeit.The invention relates to the use of a static mixing element for Homogenizing and dispersing liquid, gaseous or powdered Media for producing a drilling fluid.

An das Homogenisieren und Dispergieren von Medien gleicher oder unterschiedlicher Aggregatzustände als Voraussetzung einer Vielzahl von Verfahrensschritten der Chemie- oder Ingenieurtechnik werden zunehmend höhere Anforderungen gestellt, die mit Hilfe meist komplexer statischer oder dynamischer Mischsysteme erfüllt werden.To homogenize and disperse media of the same or different Physical states as a prerequisite for a large number of process steps Chemical or engineering technology is becoming increasingly higher Requests made using mostly complex static or dynamic Mixed systems are met.

Auch beim Horizontalbohren besteht das Erfordernis des Mischens einer Flüssigkeit mit einer pulverförmigen Substanz oder einer Flüssigkeit oder einer Suspension, wenn zur Erleichterung und Verbesserung des Bohrvorgangs beispielsweise eine Bentonit-Wasser-Suspension, als Bohr- oder Spülflüssigkeit eingesetzt werden soll. Eine solche Suspension hält das Bohrklein in Schwebe, schmiert den Rohrstrang bei dessen Einziehen und schützt diesen nach einer gewissen Aushärtephase gegen das umgebende Erdreich. Zur Variation der Eigenschaft der Suspension können Additive, wie beispielsweise Sodaasche oder Polymere, hinzugefügt werden. Also in horizontal drilling, there is the requirement of mixing a Liquid with a powdery substance or a liquid or a Suspension, if necessary to facilitate and improve the drilling process for example, a bentonite-water suspension, as a drilling or rinsing fluid should be used. Such a suspension keeps the cuttings in suspension, Lubricates the pipe string when it is pulled in and protects it after a certain curing phase against the surrounding soil. To the variation of Property of the suspension may contain additives such as soda ash or polymers.

Üblicherweise werden Bohrflüssigkeiten in einem gesonderten Vorratstank durch ein in diesem Tank arbeitendes Rührwerk, also einen dynamischen Mischer, oder durch eine schnell laufende Pumpe angemischt.Usually, drilling fluids are stored in a separate storage tank by an agitator working in this tank, ie a dynamic one Mixer, or mixed by a fast running pump.

Diese Mischsysteme haben einen erhöhten Platzbedarf und führen zu zeitlichen Verzögerungen des Bohrvorgangs, wenn nach dem Verbrauch einer Bohrflüssigkeitscharge eine neue Charge angesetzt werden muß. Sie erlauben keine kompakte Bauweise der gesamten Bohranlage.These mixing systems have an increased space requirement and lead to temporal Delays in the drilling process, if after the consumption of a Bohrflüssigkeitscharge a new batch must be applied. They do not allow one compact design of the entire drilling rig.

Es sind auch statische Mischsysteme bekannt, die im Gegensatz zu dynamischen Systemen kein Rührwerk aufweisen und einen geringeren Platzbedarf erfordern.There are also known static mixing systems, which in contrast to dynamic Systems have no agitator and a smaller footprint require.

Aus CH 182 064 A ist beispielsweise eine Vorrichtung zum Anmischen von kohlensäurehaltigem Mineralwasser bekannt, die einen statischen Mischer aufweist.From CH 182 064 A, for example, a device for mixing fizzy mineral water known to be a static mixer having.

Die DE-PS687 926 zeigt dagegen den Einsatz eines statischen Mischers, der auf gelochten Trennwänden beruht, die quer zur Strömungsrichtung verlaufen, zur Erzeugung von pysikalischem Schaum für Feuerlöschzwecke.By contrast, DE-PS687 926 shows the use of a static mixer which is based on perforated dividing walls, which run transversely to the flow direction, for the production of physical foam for fire fighting purposes.

Die US 4 313 680 A zeigt einen statischen Mixer mit senkrecht zur Flussrichtung angeordneten Umlenkelementen zum Mischen von verschiedenen Medien mit sehr kurzer Reaktionszeit.US 4,313,680 A shows a static mixer with perpendicular to the flow direction arranged deflecting elements for mixing of different media with very short reaction time.

Die JP-OS 61-242 624 zeigt eine Vorrichtung zum Erzeugen einer Emulsion aus Wasser und Öl, die einen statischen Mischer aufweist.Japanese Laid-Open Patent 61-242 624 discloses an apparatus for producing an emulsion Water and oil, which has a static mixer.

Die US 4 514 095 A offenbart einen statischen Mischer für Fluide, der eine Mischwirkung durch Umleiten von Teilströmen aus einem Kernbereich in einen Randbereich und zurück erreicht. US 4 514 095 A discloses a static mixer for fluids comprising a Mixing effect by diverting part streams from a core area into one Edge area and back reached.

Die US 4 370 062 A beschreibt eine Mischpistole zum Mischen von Zwei-Komponenten-Klebern, an deren Spitze ein statischer Mischer mit Prallplatten sitzt.US 4,370,062 A describes a mixing gun for mixing two-component adhesives, at the top of a static mixer with baffles sitting.

Die US 4 412 582 A beschreibt eine senkrechte Anordnung von Prallplatten in einem Wärmetauscher, durch die, zur Verbesserung der Wärmeübertragung, die hindurch strömende Flüssigkeit in Turbulenzen versetzt wird.US 4 412 582 A describes a vertical arrangement of baffles in a heat exchanger through which, to improve heat transfer, the flowing fluid is added to turbulence.

Die US 4 854 721 A zeigt eine Vorrichtung zum Anmischen von Getränken aus Konzentrat und Wasser, die ebenfalls senkrecht zur Hauptströmungsrichtung angeordnete Umlenkplatten aufweist.US 4 854 721 A discloses a device for mixing drinks Concentrate and water, also perpendicular to the main flow direction having arranged deflecting plates.

Die US 5 522 661 A offenbart einen statischen Mischer, der auf besonders einfache und kostengünstige Weise herzustellen ist. Die Umlenkflächen sind dabei in einem Winkel von 45° zu der Strömungsrichtung des Fluids angeordnet.US 5 522 661 A discloses a static mixer which is particularly applicable simple and inexpensive way to produce. The deflection surfaces are arranged at an angle of 45 ° to the flow direction of the fluid.

Die DE 36 18 062 A1 beschreibt eine Vorrichtung zum Vermischen von pastösen oder gelartigen Komponenten, wobei sich von einer zentral in einem Mischrohr angeordneten Achse in radialer Richtung Führungswände erstrecken, die sich in radialer Richtung verbreitern und in einem Winkel zur Strömungsrichtung des Fluids angeordnet sind. Die benachbarten Führungswände des einen Flügelkranz bildenden Mischeinsatzes überlappen sich gegenseitig und weisen Durchtritte auf.DE 36 18 062 A1 describes a device for mixing pasty or gelatinous components, being from a central in one Mixing tube arranged axis extending in the radial direction guide walls, widening in the radial direction and at an angle to the flow direction of the fluid are arranged. The adjacent guide walls of the a wing ring forming mixing insert overlap each other and have passages.

Die Verwendung statischer Mischer in Mischanlagen zum Herstellen von Bohrflüssigkeit für Horizontalbohrverfahren ist aus der deutschen Patentanmeldung 199 18 775.4 bekannt. In dem darin beschriebenen Verfahren zum Herstellen einer Bohrflüssigkeit wird das Zugabemedium, beispielsweise Bentonit, dem Wasser in Pulverform vor oder hinter einer die Bohrflüssigkeit zu der Bohranlage transportierenden Hydraulikpumpe zugeleitet. Hinter der Pumpe kann eine statische Mischstrecke angeordnet sein, die den Zugabestoff und das Wasser homogenisiert. The use of static mixers in mixing plants for the production of drilling fluid for horizontal drilling is from the German patent application 199 18 775.4 known. In the method of manufacturing described therein a drilling fluid is the addition medium, such as bentonite, the Water in powder form before or after one of the drilling fluid to the drilling rig forwarded to transporting hydraulic pump. Behind the pump can one be arranged static mixing section, which is the additive and the water homogenized.

Ein statischer Mischer, wie er beispielsweise aus "wägen+dosieren" 3/1997 Seite 23 bis 26 bekannt ist, besteht üblicherweise aus einer Mehrzahl verschiedenartiger, hintereinander geschalteter einzelner Mischelemente, die mit Hilfe eines Adapters in ein Zuleitungs- oder Ableitungssystem eingesetzt werden können. Jedes dieser Mischelemente weist eine oder mehrere Umlenkflächen auf, die gegebenenfalls von ein oder mehreren Durchlässen durchmessen werden. Die aufeinander entweder innerhalb eines Mischelements oder in nachgeschalteten Mischelementen folgenden Umlenkflächen stehen dabei stets in kleinen Winkeln geneigt zueinander und weisen ebenso bezüglich der Strömungsrichtung des in der Leitung strömenden Mediums übereinstimmend einen kleinen; von 90° verschiedenen Neigungswinkel auf.A static mixer, as he for example from "weighing + dosing" 3/1997 Page 23 to 26 is usually made of a plurality of diverse, successively connected individual mixing elements, with Help an adapter can be used in a supply or discharge system can. Each of these mixing elements has one or more deflection surfaces which, if appropriate, pass through one or more passages become. The one another either within a mixing element or in Downstream mixing elements following deflection surfaces are always there at small angles inclined to each other and also have regard to the Flow direction of the medium flowing in the conduit coinciding a small; from 90 ° different inclination angle.

Die zueinander und zu der Strömungsrichtung in einem besonderen Achswinkel stehenden Umlenkflächen erzeugen eine Zwangsführung des Stroms, so daß dieser mehrfach seine Strömungsrichtung dreht. Die gegebenenfalls die Umlenkflächen durchziehenden Durchlässe verlaufen ebenso winklig zueinander sowie zu den Umlenkflächen, so daß sowohl eine Aufteilung des Stroms als auch eine mehrfache Änderung der Strömungsrichtung erfolgt. An anderen Umlenkflächen werden die Einzelströme wieder zusammengeführt.
Dieses mehrfache Aufteilen, Umlenken und Zusammenführen der Medien bewirkt ihre Homogenisierung bzw. Dispergierung.The deflection surfaces facing each other and to the flow direction at a particular axis angle produce a forced guidance of the flow, so that it repeatedly rotates its flow direction. The possibly passing through the deflection passages also extend at an angle to each other and to the deflection surfaces, so that both a division of the current and a multiple change of the flow direction takes place. At other deflection surfaces, the individual streams are brought together again.
This multiple splitting, diverting and merging of the media causes their homogenization or dispersion.

Die Wahl verschiedener Mischergeometrien erfolgt in Abhängigkeit von der Reynolds-Zahl, die als Quotient aus den Trägheitskräften und den Reibungskräften unter anderem abhängig von den Stoffeigenschaften der Medien ist. Bei einer kritischen Strömungsgeschwindigkeit überschreiten die Trägheitskräfte einen charakteristischen Wert, verglichen mit den Reibungskräften, so daß die Strömung turbulent wird.The choice of different mixer geometries depends on the Reynolds number, which is a quotient of inertial forces and frictional forces depends, among other things, on the material properties of the media. at a critical flow velocity exceed the inertial forces a characteristic value compared with the frictional forces, so that the Flow becomes turbulent.

Die Wahl der Mischergeometrien und der Größe des gesamten Mischsystems, d.h. der Anzahl der nacheinander geschalteten Mischelemente, erfolgt des weiteren in Abhängigkeit von dem zulässigen Druckverlust der Strömung, der vor allem im Hinblick auf die für die Turbulenz erforderliche kritische Geschwindigkeit und die Erfordernisse der nachfolgenden Verfahrensschritte zu bewerten ist.The choice of mixer geometries and the size of the entire mixing system, i.e. the number of mixing elements connected in series takes place further depending on the allowable pressure drop of the flow, the especially with regard to the critical speed required for turbulence and to assess the requirements of the subsequent process steps is.

Ferner muß die Geometrie der Umlenkflächen und Durchgangsöffnungen sowie deren Anordnung relativ zueinander und zu der Strömungsrichtung derart angeordnet sein, daß möglichst ein Fehlen von toten Zonen gewährleistet werden kann, da diese ein homogenes Mischen verhindern.Furthermore, the geometry of the deflection surfaces and through holes as well their arrangement relative to each other and to the flow direction such be arranged to ensure as possible a lack of dead zones can be, because they prevent a homogeneous mixing.

Ein erheblicher Nachteil der bekannten statischen Mischer liegt darin, daß die in komplexer Geometrie gefertigten Mischelemente in aufwendigen Produktionsverfahren hergestellt werden müssen, die einen erheblichen Zeit- und Kostenaufwand verursachen. Vor allem die zum Teil massive Gestaltung der Mischer mit unterschiedlich ausgerichteten Durchlässen macht einen hohen Materialaufwand erforderlich.A significant disadvantage of the known static mixer is that the in Complex geometry manufactured mixing elements in complex production processes have to be produced, which costs a considerable amount of time and money cause. Especially the sometimes massive design of the mixer with differently aligned passages makes a high cost of materials required.

Ein weiterer Nachteil bekannter Mischer besteht darin, daß ein Reinigen der Mischer durch die zueinander in wechselnden Winkeln stehenden Umlenkflächen erheblich erschwert ist. Ein zuverlässiges einfaches Reinigen, beispielsweise durch eine lediglich den Mischer durchströmende Reinigungsflüssigkeit, ist unzureichend.Another disadvantage of known mixers is that a cleaning of the Mixers through the deflection surfaces that are in mutually alternating angles considerably more difficult. A reliable easy cleaning, for example by a cleaning liquid flowing only through the mixer, is insufficient.

Der Erfindung liegt demnach die Aufgabe zugrunde, einen statischen Mischer aufzufinden, der ein effizientes Homogenisieren und Dispergieren verschiedener Medien zum Herstellen einer Bohrflüssigkeit mit konstruktiv einfachen Mischelementen ermöglicht, die zudem kostengünstig herzustellen und einfach zu reinigen sind.The invention is therefore based on the object, a static mixer finding an efficient homogenizing and dispersing various Media for producing a drilling fluid with structurally simple It also makes mixing elements easy to manufacture and simple to be cleaned.

Die Aufgabe wird gelöst durch die Verwendung von einem Mischelement mit mindestens einer Umlenkfläche, die in einem Winkel von 70 bis 110° zu der Hauptströmungsrichtung der Medien in der durchströmten Leitung ausgerichtet ist, zum Mischen und Herstellen einer Bohrflüssigkeit, insbesondere einer Bentonit-Wasser-Suspension.The object is achieved by the use of a mixing element with at least one deflection surface which is at an angle of 70 to 110 ° to the Main flow direction of the media aligned in the flowed line is for mixing and producing a drilling fluid, in particular a Bentonite-water suspension.

Der Erfindung liegt dabei der Gedanke zugrunde, daß bei dem Aufprall der Medien auf die nur wenig zur Strömungsrichtung geneigte Umlenkfläche und dem Umströmen ihrer Kanten Scherkräfte entstehen, die zum Verwirbeln und Vermischen der Medien führen.The invention is based on the idea that during the impact of the Media on the only slightly inclined to the flow direction deflection and the flow around their edges shear forces that cause the swirling and Mix the media.

Der besondere Vorteil des erfindungsgemäßen Mischelements liegt in seiner einfachen Konstruktion, die kostengünstig und ohne Spezial maschinen gefertigt werden kann.The particular advantage of the mixing element according to the invention lies in its simple construction, which is manufactured inexpensively and without special machinery can be.

Ein weiterer Vorteil besteht darin, daß aufgrund der besonderen Ausrichtung der Umlenkfläche keine spitzen Winkel zwischen der Fläche und dem umgebenen Gehäuse bzw. der Wand vorliegen. Damit ist das Reinigen des Mischelements erheblich erleichtert.Another advantage is that due to the special orientation of the Deflection area no acute angle between the area and the surrounding Housing or the wall are present. This is the cleaning of the mixing element considerably relieved.

Überraschenderweise ermöglicht die nur wenig zur Strömungsrichtung geneigte Umlenkfläche eine sehr gute Homogenisierung der zu durchmischenden Medien, die durch mehrere hintereinander geschaltete Umlenkflächen noch verbessert werden kann.Surprisingly, the inclined only slightly to the flow direction Deflection a very good homogenization of the to be mixed Media, by several successive switching surfaces still can be improved.

In einer besonders bevorzugten Ausführungsform ist die Umlenkfläche in einem Winkel von 90° zu der Strömungsrichtung der Medien angeordnet, d.h. sie steht senkrecht zu der Strömungsrichtung.In a particularly preferred embodiment, the deflection surface is in one Angle of 90 ° to the flow direction of the media arranged, i. she stands perpendicular to the flow direction.

Das damit erzielte, besonders gute Ergebnis war aufgrund der bekannten Erwägungen des Durchschnittsfachmanns nicht zu vermuten, die aufgrund der angenommenen Erfordernisse des möglichst zu minimierenden Druckabfalls, der möglichst variantenreichen Zwangsführung der Strömung und des Vermeidens von toten Zonen eine nur wenig zur Strömungsrichtung geneigte oder eine dazu senkrecht stehende Umlenkfläche für besonders ungeeignet erscheinen ließen. Eine derart angeordnete Umlenkfläche läßt nämlich das Entstehen von hinter ihr liegenden toten Zonen zu und "bremst" die auf sie aufprallenden Strömungen in erheblichem Maße ab. Dies führt zu einer deutlichen Verminderung des Druckes und der Geschwindigkeit der Flüssigkeit. Des weiteren verzichtet die erfindungsgemäße Umlenkfläche auf eine gerichtete Zwangsführung, die zu einer mehrfachen gezielten Drehung der Strömungsrichtung des Mediums führt.The result achieved was particularly good result due to the well-known Considerations of the average expert to assume that due to the assumed requirements of the lowest possible pressure drop, the most variant-rich forced guidance of the flow and the avoidance from dead zones one only slightly inclined to the flow direction or one To vertical deflection appear to be particularly unsuitable left. A deflecting surface arranged in this way allows the formation of behind them lying dead zones and "slows" the impacting on them currents to a considerable extent. This leads to a significant reduction the pressure and the speed of the fluid. Furthermore, omitted the deflecting surface according to the invention on a directional forced operation, the a multiple targeted rotation of the flow direction of the medium leads.

In dem erfindungsgemäß verwendeten Mischelement kann die Form des Querschnitts der Umlenkfläche im wesentlichen zu dem Querschnittsumriß der durchströmten Leitung korrespondieren. Vorteilhafterweise ist ihr Durchmesser jedoch kleiner als der der Leitung, so daß zwischen der Leitung und der Umlenkfläche mindestens ein Durchlaß für das von der Umlenkfläche abgelenkte Medium entsteht.In the mixing element used according to the invention, the shape of the Cross-section of the deflection surface substantially to the cross-sectional contour of flowed through line correspond. Advantageously, its diameter but smaller than that of the line, so that between the line and the Deflection at least one passage for the deflected from the deflection Medium arises.

Die Umlenkfläche kann über Befestigungsmittel unmittelbar an der durchströmten Leitung oder an einem Gehäuse eines in die Leitung einzusetzenden Mischelements befestigt sein.The deflection surface can flow through fastening means directly to the flow Line or on a housing of a line to be used in the line Attached mixing element.

In einer besonderen Ausführungsform kann es zudem vorteilhaft sein, das Mischelement über einen Adapter in die Leitung einzusetzen.In a particular embodiment, it may also be advantageous for the Insert mixing element into the line via an adapter.

Vorteilhafterweise kann das Gehäuse des Mischelementes derart gestaltet sein, daß die in Strömungsrichtung hinter der Umlenkfläche liegenden Seitenflächen des Gehäuses zu einer Führung des Mediums genutzt werden.Advantageously, the housing of the mixing element can be designed in such a way that lying in the flow direction behind the deflection side surfaces of the housing can be used to guide the medium.

Beispielsweise können sie trichterartig zulaufen, um sich zu einer auf eine Umlenkfläche eines nachgeschalteten oder in demselben Mischsystem befindlichen Umlenkfläche führenden Durchgangsöffnung zu verengen.For example, they can run in a funnel shape to become one on one Deflection of a downstream or in the same mixing system located Conveying leading constricting passage opening.

Durch die Verengung wird die Druckenergie des Stroms teilweise in kinetische Energie umgewandelt. Damit erhöhen sich die beim Aufprall auf die Umlenkfläche entstehenden, das Homogenisieren begünstigenden Scherkräfte. Due to the constriction, the pressure energy of the flow is partly in kinetic Energy converted. This increases the impact on the deflection surface resulting, the homogenization favoring shear forces.

In einer weiteren vorteilhaften Ausführungsform kann die Umlenkfläche mit Öffnungen versehen sein, die eine Aufteilung des auf die Fläche treffenden Mediums ermöglichen. Damit kann eine Verbesserung der Homogenisierung erreicht werden, ohne daß jedoch ein Reinigen des Systems erheblich erschwert ist.In a further advantageous embodiment, the deflection surface with Be provided openings that a division of the striking on the surface Enable mediums. This can improve the homogenization be reached, but without significantly cleaning the system is difficult.

Die einzelnen Mischelemente können in einem Mischsystem in einer Vielzahl hintereinander geschaltet werden. Es kann zudem auch vorteilhaft sein, Mischelemente parallel nebeneinander zu schalten, wenn z.B. die Durchflußmenge an Medien erhöht werden soll.The individual mixing elements can in a mixed system in a variety be switched one behind the other. It may also be advantageous, mixing elements parallel next to each other when e.g. the flow rate to be increased to media.

Das erfindungsgemäß verwendete Mischelement kann zum Homogensieren und Mischen von Gasen, Flüssigkeiten, Suspensionen oder Dispersionen eingesetzt werden. Es kann somit in einer Vielzahl verschiedener Verfahren und Vorrichtungen, z.B. aus den Bereichen der Chemie- oder Verfahrenstechnik sowie in der Kunststoffindustrie, der Wasseraufbereitung oder in der Lebensmittelindustrie Verwendung finden.The mixing element used in the invention can for homogenizing and Mixing of gases, liquids, suspensions or dispersions used become. It can thus be used in a variety of different processes and Devices, e.g. from the fields of chemical or process engineering as well as in the plastics industry, water treatment or in the food industry Find use.

Im einzelnen kann es zum Mischen von Bohrflüssigkeiten, z.B. Bentonit-Wasser-Suspensionen, genutzt werden, die beispielsweise für Horizontal- oder Vertikalbohrungen benötigt werden.In particular, it may be used to mix drilling fluids, e.g. Bentonite-water suspensions, be used, for example, for horizontal or Vertical holes are needed.

Im folgenden wird die Erfindung anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels des näheren erläutert.In the following the invention with reference to an illustrated in the drawings Embodiment of the closer explained.

In den Zeichnungen zeigen:

Fig. 1
einen Längsschnitt durch ein aus mehreren nacheinander geschalteten erfindungsgemäßen Einzelelementen bestehendes Mischsystem und
Fig. 2
einen Querschnitt durch ein Mischelement in der Ebene A-A der Fig. 1.
In the drawings show:
Fig. 1
a longitudinal section through an existing of several successively connected individual elements according to the invention mixing system and
Fig. 2
a cross section through a mixing element in the plane AA of Fig. 1st

Ein Einzelelement 1 des Mischsystems besteht aus einem Gehäuse 2 mit zwei Schrägflächen 3 und 4, die sich zu einer Durchgangsöffnung 5 trichterförmig verengen. Sie ermöglichen den Durchlaß des in Pfeilrichtung durch die Eingangsöffnung 6 in das Mischsystem einströmenden Mediums.A single element 1 of the mixing system consists of a housing 2 with two Sloping surfaces 3 and 4, which are funnel-shaped to a through hole 5 narrow. They allow the passage of the arrow in the direction of the inlet opening 6 in the mixing system inflowing medium.

Die senkrecht zu den Außenflächen 7, 8 des Gehäuses stehende Umlenkfläche 9 ist über drei Zungen 10a, 10b, 10c zwischen die Gehäuse 2 geklemmt. Sie weist im Vergleich zu dem Gehäuse einen geringeren Radius auf, so daß zwischen dem Gehäuse 2 und der Umlenkfläche 9 Durchlässe 11a, 11b, 11c frei bleiben. Teile 13a bis d stellen Zuganker dar, die das Kopfstück 12 und das Endstücks 17 gegeneinander ziehen und so durch die Gehäuse 2 die Umlenkfächen 9 festklemmen.The perpendicular to the outer surfaces 7, 8 of the housing deflection 9 is clamped by three tongues 10 a, 10 b, 10 c between the housing 2. she has a smaller radius compared to the housing, so that between the housing 2 and the deflection 9 passages 11a, 11b, 11c free stay. Parts 13a to d represent tie rods, the head piece 12 and the End piece 17 pull against each other and so through the housing 2 the Umlenkfächen 9 clamp.

In dem Ausführungsbeispiel ist ein Mischsystem aus 3 Einzelelementen mit jeweils einer Umlenkfläche und einem Kopfstück 12 und einem Endstück 17 zusammengesetzt. Diese sind über Dichtungen 20 gegeneinander abgedichtet. Diese Anordnung kann beliebig durch weitere Mischelemente ergänzt werden.In the embodiment, a mixing system of 3 individual elements with in each case one deflection surface and one head piece 12 and one end piece 17 composed. These are sealed by seals 20 against each other. This arrangement can be supplemented as desired by further mixing elements.

Das Kopfstück weist eine Eingangsöffnung 6 auf, die auf die erste, als Bestandteil des Kopfstückes gearbeitete Umlenkfläche mündet. Die Öffnung ist trichterförmig gearbeitet.The head has an inlet opening 6, which on the first, as a component the head piece worked deflection opens. The opening is funnel-shaped.

Das Endstück 17 dagegen trägt keine Umlenkfläche, sondern entläßt das Medium durch die Ausgangsöffnung 16. Endstück 17 und Kopfstück 12 sind mit einem Gewinde versehen (hier nicht dargestellt), in das gängige Rohrverschraubungen eingeschraubt werden können.The tail 17, however, carries no deflection, but dismisses the Medium through the outlet opening 16. End piece 17 and head 12 are with threaded (not shown here), in the common pipe fittings can be screwed.

Die Medien strömen in das Kopfstück 12 über die Eingangsöffnung 6 und prallen auf die Umlenkfläche 9. Dort werden sie abgelenkt und strömen durch die Durchlässe 11a, 11b, 11c in den Mischraum 19. Sie werden teilweise entlang der Schrägflächen 3 und 4 geführt. Die Medien strömen im folgenden durch die Durchgangsöffnung 5 auf eine weitere Umlenkfläche. Sie durchströmen ein zweites Mischelement in der eben beschriebenen Weise.The media flow into the header 12 via the inlet opening 6 and bouncing on the deflection 9. There they are distracted and flow through the passages 11a, 11b, 11c in the mixing chamber 19. They are partially guided along the inclined surfaces 3 and 4. The media flow in the following through the passage opening 5 to a further deflection surface. They flow through a second mixing element in the manner just described.

Nach dem Durchströmen des letzten Mischelements gelangen sie in die Ausgangsöffnung 16 des Endstückes 17 und verlassen das Mischsystem.After flowing through the last mixing element, they pass into the outlet opening 16 of the tail 17 and leave the mixing system.

Claims (11)

  1. Use of a static mixing element for the mixing of media, having a housing (2) with at least one deflecting surface (9) arranged at an angle in the range of 70° to 110° to the direction of flow of the media, for producing a boring fluid.
  2. Use of a static mixing element for the mixing of media, having a housing (2) with at least one deflecting surface (9) arranged at an angle in the range of 70° to 110° to the direction of flow of the media, for producing a bentonite-water suspension.
  3. Use of a static mixing element (1) according to claim 1 or 2, characterised in that the deflecting surface is arranged at an angle of 90° to the direction of flow of the media.
  4. Use of a static mixing element according to one of the claims 1 to 3, characterised in that it has at least one through passage (11a, 11b, 11c) between the deflecting surface (9) and the housing (2).
  5. Use of a static mixing element according to one of the claims 1 to 4, characterised in that the housing (2) has funnel-shaped tapering inclined surfaces (3, 4).
  6. Use of a mixing system for manufacturing a boring fluid with at least one of the static mixing elements used in claims 1 to 5.
  7. Use of a mixing system according to claim 6, characterised in that it has at least two parallel connected static mixing elements of the static mixing elements used in claims 1 to 5.
  8. Use of a mixing system according to one of the claims 6 or 7, characterised in that a head piece (12) and an end piece (17) are clamped to each other via tensioning means (13a, 13b, 13c, 13d).
  9. Method for mixing a boring fluid, in particular a bentonite-water suspension, characterised in that the media to be mixed are guided at an angle in the range of 70° to 110° towards a deflecting surface (9) arranged in their direction of flow.
  10. Method according to claim 9, characterised in that the media are guided at an angle of 90° towards a deflecting surface (9) arranged in their direction of flow.
  11. Method according to one of the claims 9 or 10, characterised in that the media are separated and/or brought together by forced guidance.
EP01940350A 2000-04-20 2001-04-20 Static mixing element Expired - Lifetime EP1278593B1 (en)

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DE10019759A DE10019759C2 (en) 2000-04-20 2000-04-20 Static mixing system
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AU7395701A (en) 2001-11-07
US20070211570A1 (en) 2007-09-13
WO2001080985A1 (en) 2001-11-01
US7878705B2 (en) 2011-02-01
DE10019759A1 (en) 2001-10-31
ATE291486T1 (en) 2005-04-15
AU2001273957B2 (en) 2005-03-24
US20040100864A1 (en) 2004-05-27
EP1278593A1 (en) 2003-01-29
DE10019759C2 (en) 2003-04-30
DE50105692D1 (en) 2005-04-28

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