EP0749776B1 - Mixer with tubular housing - Google Patents

Mixer with tubular housing Download PDF

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Publication number
EP0749776B1
EP0749776B1 EP95810418A EP95810418A EP0749776B1 EP 0749776 B1 EP0749776 B1 EP 0749776B1 EP 95810418 A EP95810418 A EP 95810418A EP 95810418 A EP95810418 A EP 95810418A EP 0749776 B1 EP0749776 B1 EP 0749776B1
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EP
European Patent Office
Prior art keywords
mixer
accordance
mixing
elements
separating
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.)
Expired - Lifetime
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EP95810418A
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German (de)
French (fr)
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EP0749776A1 (en
Inventor
Felix Streiff
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Sulzer Chemtech AG
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Sulzer Chemtech AG
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Application filed by Sulzer Chemtech AG filed Critical Sulzer Chemtech AG
Priority to EP95810418A priority Critical patent/EP0749776B1/en
Priority to DE59508992T priority patent/DE59508992D1/en
Priority to AT95810418T priority patent/ATE198839T1/en
Priority to ES95810418T priority patent/ES2155509T3/en
Priority to DE29522199U priority patent/DE29522199U1/en
Priority to TW085105453A priority patent/TW315314B/zh
Priority to CA002178065A priority patent/CA2178065C/en
Priority to US08/660,434 priority patent/US5944419A/en
Priority to KR1019960020691A priority patent/KR100420822B1/en
Priority to CN96111003A priority patent/CN1052171C/en
Priority to JP15997396A priority patent/JP4283901B2/en
Priority to BR9602858A priority patent/BR9602858A/en
Publication of EP0749776A1 publication Critical patent/EP0749776A1/en
Publication of EP0749776B1 publication Critical patent/EP0749776B1/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
    • 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
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4321—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa the subflows consisting of at least two flat layers which are recombined, e.g. using means having restriction or expansion zones

Definitions

  • the invention relates to a mixer in a tube is arranged and the at least one mixing element or comprises a mixing body. It also refers to Uses of such a mixer.
  • a mixer is known from US Pat. No. 3,051,453 from a linear arrangement of mixing elements composed, hereinafter referred to as "Multiflux mixing body" be designated.
  • This multiflux mixing body whose cross section is square two channels that extend in the direction of flow up to Continuously narrow the center of the mixing body and behind the narrowest point in a plane rotated by 90 ° continuously expand.
  • One by the mixing body flowing medium undergoes a transformation through which the number of sub-layers doubled.
  • the well-known Multiflux and ISG mixing bodies need to their manufacture relatively much material, its volume namely occupies at least 25 to 30% of the pipe volume.
  • the lengths of the mixing body are in the direction of flow relatively long, namely about the same size as the Pipe diameter.
  • the empty volume is greater than 80 to 90%; and thus the material requirement is essential less. Thanks to its special shape, it can Mixing element of the mixer according to the invention essential shorter, namely at least half as long - at comparable effect as with the known mixing bodies - be made.
  • a mixer with a plurality Such mixing elements is defined in claim 2.
  • the mixer according to the invention has mixing elements a particularly simple form. Thanks to this shape can be a monolithic mixing body that is a series of several mixing elements connected in series includes, well by plastic injection molding or Manufacture investment casting (steel), especially with the simplest embodiment (two-hole variant) two-part tools can be used.
  • the Mixing bodies according to the invention can also be used for example, easily produce from sheet metal.
  • the mixer according to the invention is cheaper than the known static mixers: two flowable Media of similar viscosity can be spread over a distance (L) of less than ten pipe diameters (D) homogeneous be mixed.
  • tubes with any cross-section can be provided; are preferred however square or circular cross sections.
  • the mixing elements 1 and 1 'arranged in a tube 10 1 each consist of two dividers 2 and 2 ' and two partial deflection disks 3 and 3 ', which in one with dash-dotted lines indicated plane 3a and 3a '. lie. (Form the partial deflection disks 3 of level 3a together a deflection plate 30, cf. 7a).
  • the level 3a is perpendicular to the tube axis 5 and parallel to planes 2a and 2b, the upper edge 20 and the lower edge, respectively Touch 21 of the dividers 2.
  • the three levels 2a, 3a and 2b delimit two sections 1a and 1b of the mixing element 1. Each section is a subdivision of the section Separator 2 assigned.
  • the dividers 2 of the two Sections 1a and 1b intersect under a right Angle.
  • the pipe cross section is through the dividers 2 in divided into four sub-areas of equal size, whereby two of these partial areas through the partial deflection disks 3 are covered.
  • the open areas are as Constrictions and through holes 4 for that too mixing medium provided.
  • the two successive mixing elements 1 and 1 ' are structured essentially the same. But that Mixing element 1 represents the mixing element 1 ' is a mirror image.
  • the neighboring dividers 2 and 2 ' cross each other; the open partial areas 4 and 4 ' are staggered.
  • the partial deflection disks 3 can also have an angle a the cross-sectional plane 3a - see Fig. 2. This angle ⁇ advantageously does not exceed 30 ° chosen.
  • Figures 3 and 4 show others Embodiments with inclined surfaces. If axis 5 understood as vertical, the arrow 6 in the Figures 2 to 4 each the fall line Partial deflection disk 3. In FIG. 2, this arrow is 6 parallel to the upper separator 2. At the The embodiment of Figure 3, the arrow 6 is tangential to a circular cylinder concentric to axis 5. At the embodiment of Figure 4, the arrow 6 is radial directed outwards.
  • Figures 5a and 5b show mixing elements 1 and 1 ', at which each have two dividers 2 a section 1a or 1b (not shown in these figures). There is exactly one on both sides of each separating web 2 open partial area 4 arranged.
  • the mixing element 1 ' with the open partial areas 4 'immediately adjacent element of the mixing element 1.
  • the open Partial areas 4 and 4 ' are offset from one another arranged.
  • FIG. 5 Forms of the two mixing elements 1 and 1 'identical and not a mirror image like the two-hole version (Fig.1).
  • each one Series of such half-elements can include simple Be produced with two-part tools.
  • the entire mixing body is obtained by assembling two monolithic partial bodies.
  • Figure 6 is also with arrows 8, 8 'and 8 " Flow course of the medium to be mixed indicated.
  • the arrow 8 ' is perpendicular to the image surface and is after directed in front; the arrow 8 "- also vertical - is directed backwards.
  • the reference number 9 indicates a Where the arrows create two Partial flows is indicated.
  • the partial deflection disks 3 are advantageously in one common level. If there are at least two Separators 2 per section (three-hole variant) can several partial deflection disks 3 a common disk or form a single disc 30 (four-hole variant): see Figures 5a and 5b and the corresponding Figures 7a and 7b for the four-hole variant.
  • FIGS. 7a and 7b only the only one and common deflection plate 30 and 30 'shown.
  • the Dash-dotted lines 23 represent the lower edges the upper dividers.
  • the shapes of the four-hole version Adjacent mixing elements mirror each other.
  • the mixer according to the invention can instead of one circular cross section also having a cross section another shape, for example a square.
  • the angles between the crossing dividers 2, 2 ' can also deviate from 90 °.
  • Sections 1a and 1b can be of different lengths.
  • the length of the sections la and 1b is advantageously in the range between D / 8 and D; it is preferably D / 4.
  • FIG. 8 illustrates what deviations from the simple forms described above, for example are conceivable: between the spaced mixing elements 1, 1 'connecting elements 35 are arranged.
  • the Separators 2 have additional elements 25 Reinforcement or flow control.
  • Separators 2 'and 2 "adjacent mixing elements 1 'and 1" are on the Position 29 inserted into each other.
  • Individual dividers 2 and Partial deflection disks 3 are not flat.
  • the mixing elements 1 and 1 ' have different numbers of dividers 2 and 2' per Section 1a or 1b, namely two or one.
  • On Divider 2 has a recess 29.
  • the Fig.8 is only as an illustration of individual features understand; the special combination of all listed Features in the same mixer do not need special to be beneficial.
  • the tube 10 can also not be conical shown) so that it tapers in the direction of flow; in this case the mixing bodies 1, 1 'have to be changed Cross-section correspondingly of different sizes his.
  • x 0.5 means that the proportions of the two components to be mixed are the same size.
  • the reference numerals 1 * to 5 * refer to the mixer types listed in the table above.
  • the mixer according to the invention which consists of little Having material made monolithic is an advantage from an inexpensive, combustible plastic Injection molding. This mixer is suitable especially good at being used as a disposable item become.
  • the mixer according to the invention can also be used for mixing turbulent flowing media can be used.
  • the open partial areas 4, 4 are as Designated recesses.

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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)
  • Food-Manufacturing Devices (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

A mixer assembly incorporated within a pipe (10) consists of one or more elements (1, 1') disrupting the laminar fluid flow. Each element (1, 1') is formed by a disc less two opposing radial sectors, with a baffle edge (5) along one sector face of one diametrical axis, and a second baffle edge (2) along the opposite sector face of the other diametrical axis. The baffles on each element (1, 1') form a cross and act as supports and spacers from the next element (1, 1'). Part-discs and vanes guide the fluid flow at the boundaries (3, 3') between elements (1, 1'). An open gap (4, 4') is maintained on both sides of each baffle (2, 2'). The mixer elements are assembled as a battery in series, each element (1, 1') being slightly rotated during assembly with respect to the adjacent element (1, 1').

Description

Die Erfindung betrifft einen Mischer, der in einem Rohr angeordnet ist und der mindestens ein Mischelement oder einen Mischkörper umfasst. Sie bezieht sich auch auf Verwendungen eines derartigen Mischers.The invention relates to a mixer in a tube is arranged and the at least one mixing element or comprises a mixing body. It also refers to Uses of such a mixer.

Aus der US-PS 3 051 453 ist ein Mischer bekannt, der sich aus einer linearen Anordnung von Mischelementen zusammensetzt, die nachfolgend als "Multiflux-Mischkörper" bezeichnet werden. Dieser Multiflux-Mischkörper, dessen Querschnitt quadratisch ist, weist zwei Kanäle auf, die sich in Strömungsrichtung bis zur Mitte des Mischkörpers kontinuierlich verengen und hinter der engsten Stelle in einer um 90° gedrehten Ebene wieder kontinuierlich erweitern. Ein durch den Mischkörper fliessendes Medium erfährt eine Umformung, durch die sich die Anzahl der Teilschichten verdoppelt.A mixer is known from US Pat. No. 3,051,453 from a linear arrangement of mixing elements composed, hereinafter referred to as "Multiflux mixing body" be designated. This multiflux mixing body, whose cross section is square two channels that extend in the direction of flow up to Continuously narrow the center of the mixing body and behind the narrowest point in a plane rotated by 90 ° continuously expand. One by the mixing body flowing medium undergoes a transformation through which the number of sub-layers doubled.

Der Multiflux-Mischkörper lässt sich - geometrisch gesehen - aus vier keilförmigen Teilkörpern und zwei dreieckigen Platten aufbauen. In einer besonderen Ausführungsform haben die Keile die Form eines halbierten Würfels, der längs der Diagonale einer Seitenfläche halbiert ist. Je zwei der Keile - der eine gegenüber dem andern um 90° gedreht - bilden jeweils einen zusammenhängenden Teilkörper. Die beiden Platten bilden Trennwände zwischen den beiden Kanälen des Mischkörpers. Die Teilkörper nehmen ein Volumen ein, das 25 bis 30 % des dem Mischkörper zugeordneten Rohrvolumens beträgt.The Multiflux mixing body can be - geometrically seen - from four wedge-shaped partial bodies and two build up triangular plates. In a special one Embodiment, the wedges have the shape of a halve Cube, along the diagonal of one side is halved. Two of the wedges - one opposite the other others rotated by 90 ° - each form one contiguous partial body. Form the two plates Partitions between the two channels of the mixing body. The partial bodies take up a volume that is 25 to 30% of the pipe volume assigned to the mixing body.

Es sind analoge Mischkörper mit vier Kanälen - sogenannte ISG-Mischkörper (ISG = Interfacial Surface Generator) - bekannt (siehe H.Brünemann, G.John "Mischgüte und Druckverlust statischer Mischer mit verschiedenen Bauformen", Chemie-Ing.-Techn. 43. Jahrg. 1971, S.348). Die ISG-Mischkörper weisen kreisförmige Querschnitte auf. In einem Mischer mit ISG-Mischkörpern werden in einem zu mischenden und aus zwei Komponenten bestehenden Medium acht Teilschichten erzeugt.They are analog mixing bodies with four channels - so-called ISG mixing body (ISG = Interface Surface Generator) - known (see H.Brünemann, G.John "Mischgüte und Static mixer pressure drop with various Designs ", Chemical Engineering Techn. 43rd year 1971, p.348). The ISG mixing bodies have circular cross sections. In a mixer with ISG mixing bodies are in one mixing medium consisting of two components eight sub-layers generated.

Die bekannten Multiflux- und ISG-Mischkörper benötigen zu ihrer Herstellung relativ viel Material, dessen Volumen nämlich mindestens 25 bis 30 % des Rohrvolumens einnimmt. Die Längen der Mischkörper in Strömungsrichtung sind relativ lang, nämlich ungefähr gleich gross wie der Rohrdurchmesser.The well-known Multiflux and ISG mixing bodies need to their manufacture relatively much material, its volume namely occupies at least 25 to 30% of the pipe volume. The lengths of the mixing body are in the direction of flow relatively long, namely about the same size as the Pipe diameter.

Es ist Aufgabe der Erfindung, einen Mischer vom Multiflux- oder ISG-Typ zu schaffen, dessen Mischkörper oder Mischelemente aus weniger Material herstellbar sind. Diese Aufgabe wird mit den in Anspruch 1 genannten Merkmalen gelöst. Der Leervolumenanteil ist grösser als 80 bis 90 %; und somit ist der Materialbedarf wesentlich geringer. Dank seiner besonderen Form kann das Mischelement des erfindungsgemässen Mischers wesentlich kürzer, nämlich mindestens halb so lang - bei vergleichbarer Wirkung wie bei den bekannten Mischkörpern - gemacht werden. Ein Mischer mit einer Mehrzahl derartiger Mischelemente ist in Anspruch 2 definiert.It is an object of the invention to provide a mixer To create multiflux or ISG type, its mixing body or mixing elements can be produced from less material. This object is achieved with those mentioned in claim 1 Features resolved. The empty volume is greater than 80 to 90%; and thus the material requirement is essential less. Thanks to its special shape, it can Mixing element of the mixer according to the invention essential shorter, namely at least half as long - at comparable effect as with the known mixing bodies - be made. A mixer with a plurality Such mixing elements is defined in claim 2.

Die abhängigen Ansprüche 3 bis 18 beziehen sich auf vorteilhafte Ausführungsformen des erfindungsgemässen Mischers. Die Ansprüche 19 und 20 betreffen Verwendungen der Mischer.The dependent claims 3 to 18 relate to advantageous embodiments of the inventive Mixer. Claims 19 and 20 relate to uses the mixer.

Der erfindungsgemässe Mischer weist Mischelemente mit einer besonders einfachen Form auf. Dank dieser Form lässt sich ein monolithischer Mischkörper, der eine Serie von mehreren hintereinander geschalteten Mischelementen umfasst, gut durch Spritzgiessen aus Kunststoff oder Feinguss (Stahl) herstellen, wobei insbesondere bei der einfachsten Ausführungsform (Zweilöcher-Variante) zweiteilige Werkzeuge verwendbar sind. Die erfindungsgemässen Mischkörper lassen sich auch beispielsweise aus Blech auf einfache Weise herstellen.The mixer according to the invention has mixing elements a particularly simple form. Thanks to this shape can be a monolithic mixing body that is a series of several mixing elements connected in series includes, well by plastic injection molding or Manufacture investment casting (steel), especially with the simplest embodiment (two-hole variant) two-part tools can be used. The Mixing bodies according to the invention can also be used for example, easily produce from sheet metal.

Der erfindungsgemässe Mischer eignet sich besonders für zähe Medien wie beispielsweise Kunststoffe, Harze oder Klebstoffe (wobei die Reynolds-Zahl Re = v·D·ρ/η kleiner als 1 ist; v: Geschwindigkeit des fliessenden Mediums, D: Rohrdurchmesser, ρ: Dichte des Mediums, η: Viskosität). Bezüglich Mischgüte und Druckverlust (= NeReD, Ne: Newton-Zahl) ist der erfindungsgemässe Mischer günstiger als die bekannten statischen Mischer: Zwei fliessfähige Medien ähnlicher Viskosität können über eine Strecke (L) von weniger als zehn Rohrdurchmessern (D) homogen vermischt werden.The mixer according to the invention is particularly suitable for tough media such as plastics, resins or Adhesives (where the Reynolds number Re = v · D · ρ / η smaller than 1; v: velocity of the flowing medium, D: Pipe diameter, ρ: density of the medium, η: viscosity). Regarding mixing quality and pressure loss (= NeReD, Ne: Newton number), the mixer according to the invention is cheaper than the known static mixers: two flowable Media of similar viscosity can be spread over a distance (L) of less than ten pipe diameters (D) homogeneous be mixed.

Im Gegensatz zu den bekannten Multiflux- oder ISG-Mischern weist der erfindungsgemässe Mischer keine Kanäle mit konfusor- und diffusorartigen Abschnitten oder Bohrungen auf. Versuche ergaben, dass einfache Scheiben mit Löchern und Trennstegen, die auf den Scheiben angeordnet sind, eine überraschend gute Mischgüte liefern. Effekte, die aufgrund fehlender konfusor- und diffusorartigen Abschnitten zu erwarten waren, erwiesen sich in Bezug auf die Mischgüte als praktisch ohne störenden Einfluss.In contrast to the well-known Multiflux or ISG mixers the mixer according to the invention has no channels with confusor and diffuser sections or Holes on. Trials have shown that simple disks with holes and dividers on the discs are arranged, a surprisingly good mix quality deliver. Effects due to lack of confusion and diffuser-like sections were to be expected in terms of mixing quality as practically without disruptive influence.

Für den erfindungsgemässen Mischer können Rohre mit beliebigm Querschnitt vorgesehen werden; bevorzugt sind jedoch quadratische oder kreisförmige Querschnitte.For the mixer according to the invention, tubes with any cross-section can be provided; are preferred however square or circular cross sections.

Es wurden Versuche mit erfindungsgemässen Mischern durchgeführt, deren Mischelemente jeweils 2, 3 oder 4 Löcher aufwiesen. Die Länge der Elemente war in allen Fällen gleich dem halben Rohrdurchmesser. Die Versuche ergaben eine Homogenisierung (Variationskoeffizient s/x ≤ 0,01) über Strecken von 8, 7 bzw. 8 Rohrdurchmessern. Der Druckverlust war wesentlich geringer als bei den bekannten Multiplex- und ISG-Mischern.Experiments were carried out with mixers according to the invention, the mixing elements of which each had 2, 3 or 4 holes. The length of the elements was half the pipe diameter in all cases. The tests showed homogenization (coefficient of variation s / x ≤ 0.01) over distances of 8, 7 or 8 pipe diameters. The pressure loss was much lower than with the known multiplex and ISG mixers.

In der folgenden Tabelle sind Messresultate zusammengefasst. Die Definitionen der Grössen WLV, WLD 1/3 und WLL 1/3 sind beispielsweise aus folgender Publikation bekannt: "Mischen beim Herstellen und Verarbeiten von Kunststoffen", Reihe "Kunststofftechnik", VDI-Verlag, Düsseldorf, 1991 (Auch die Definition des Variationskoeffizienten s/x , siehe oben, findet man dort). Diese Grössen, die als spezifische Wirkungen bezeichnet werden, machen relative Angaben über das Volumen des Mischers, seinen Durchmesser bzw. die Mischerlänge; sie beziehen sich auf den bekannten SMX-Mischer, der beispielsweise aus der DE-PS 28 08 854 (= P.5473) bekannt ist. Die Homogenisierungslänge (L/D)h ist bei s/x = 0.01 abgelesen worden (vgl. Fig.9). Mischertyp NeReD (L/D)h WLV WLD 1/3 WLL 1/3 1* SMX 1200 10 1 1 1 2 * 2-Loch 500 8 0.27 0.69 0.55 3* 3-Loch 1000 7 0.41 0.84 0.58 4* 4-Loch 2070 8 1.10 1.11 0.89 5* Multiflux 920 15 1.73 1.05 1.57 The results of the measurements are summarized in the following table. The definitions of the sizes W LV , W LD 1/3 and W LL 1/3 are known, for example, from the following publication: "Mixing in the manufacture and processing of plastics", "Plastics technology" series, VDI-Verlag, Düsseldorf, 1991 (also the Definition of the coefficient of variation s / x , see above, can be found there). These quantities, which are referred to as specific effects, give relative information about the volume of the mixer, its diameter or the mixer length; they relate to the known SMX mixer, which is known for example from DE-PS 28 08 854 (= P.5473). The homogenization length (L / D) h is at s / x = 0.01 has been read (see Fig. 9). Mixer type NeRe D (L / D) h W LV W LD 1/3 W LL 1/3 1* SMX 1200 10 1 1 1 2 * 2 holes 500 8th 0.27 0.69 0.55 3 * 3 holes 1000 7 0.41 0.84 0.58 4 * 4 holes 2070 8th 1.10 1.11 0.89 5 * Multiflux 920 15 1.73 1.05 1.57

Der Multiflux-Mischer wird bezüglich den spezifischen Wirkungen durch die getesteten Mischer übertroffen.The Multiflux mixer is related to the specific Effects exceeded by the tested mixers.

Nachfolgend wird die Erfindung anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Explosionszeichnung eines statischen Mischers gemäss der Erfindung mit zwei Mischelementen (Zweilöcher-Variante),
Fig.2-4
Varianten zum Mischelement der Fig.1,
Fig.5a,b
Mischelemente mit zwei Trennstegen pro Abschnitt (Dreilöcher-Variante),
Fig. 6
einen Längsschnitt durch einen Mischer mit Elementen gemäss Fig.5,
Fig.7a,b
Umlenkscheiben zu Mischelementen mit drei Trennstegen (Vierlöcher-Variante),
Fig. 8
Mischelemente zu einem quadratischen Rohr und
Fig. 9
ein Diagramm mit Messresultaten für die Variationskoeffizienten s /x (mit x = 0.5).
The invention is explained in more detail below with reference to the drawings. Show it:
Fig. 1
an exploded view of a static mixer according to the invention with two mixing elements (two-hole variant),
Fig. 2-4
Variants of the mixing element of Fig.1,
Fig.5a, b
Mixing elements with two dividers per section (three-hole variant),
Fig. 6
2 shows a longitudinal section through a mixer with elements according to FIG. 5,
Fig.7a, b
Deflection disks to mixing elements with three dividers (four-hole variant),
Fig. 8
Mixing elements to form a square tube and
Fig. 9
a diagram with measurement results for the variation coefficients s / x (With x = 0.5).

Die in einem Rohr 10 angeordneten Mischelemente 1 und 1' der Fig.1 bestehen jeweils aus zwei Trennstegen 2 bzw. 2' und zwei Teilumlenkscheiben 3 bzw. 3', die in einer mit strichpunktierten Linien angedeuteten Ebene 3a bzw. 3a'. liegen. (Die Teilumlenkscheiben 3 der Ebene 3a bilden zusammen eine Umlenkscheibe 30, vgl. Fig. 7a). Die Ebene 3a liegt senkrecht zur Rohrachse 5 und parallel zu Ebenen 2a und 2b, die die obere Kante 20 bzw. die untere Kante 21 der Trennstege 2 berühren. Die drei Ebenen 2a, 3a und 2b begrenzen zwei Abschnitte 1a und 1b des Mischelements 1. Jedem Abschnitt ist ein den Abschnitt unterteilender Trennsteg 2 zugeordnet. Die Trennstege 2 der beiden Abschnitte 1a und 1b kreuzen sich unter einem rechten Winkel. Der Rohrquerschnitt ist durch die Trennstege 2 in vier gleich grosse Teilflächen unterteilt, wobei zwei dieser Teilflächen durch die Teilumlenkscheiben 3 abgedeckt sind. Die offenen Teilflächen sind als Einschnürungen und Durchtrittslöcher 4 für das zu mischende Medium vorgesehen.The mixing elements 1 and 1 'arranged in a tube 10 1 each consist of two dividers 2 and 2 ' and two partial deflection disks 3 and 3 ', which in one with dash-dotted lines indicated plane 3a and 3a '. lie. (Form the partial deflection disks 3 of level 3a together a deflection plate 30, cf. 7a). The level 3a is perpendicular to the tube axis 5 and parallel to planes 2a and 2b, the upper edge 20 and the lower edge, respectively Touch 21 of the dividers 2. The three levels 2a, 3a and 2b delimit two sections 1a and 1b of the mixing element 1. Each section is a subdivision of the section Separator 2 assigned. The dividers 2 of the two Sections 1a and 1b intersect under a right Angle. The pipe cross section is through the dividers 2 in divided into four sub-areas of equal size, whereby two of these partial areas through the partial deflection disks 3 are covered. The open areas are as Constrictions and through holes 4 for that too mixing medium provided.

Die beiden aufeinander folgenden Mischelemente 1 und 1' sind im wesentlichen gleich aufgebaut. Aber das Mischelement 1 stellt die zum Mischelement 1' spiegelbildliche Form dar. Die benachbarten Trennstege 2 und 2' kreuzen sich; die offenen Teilflächen 4 und 4' sind gegeneinander versetzt angeordnet.The two successive mixing elements 1 and 1 ' are structured essentially the same. But that Mixing element 1 represents the mixing element 1 ' is a mirror image. The neighboring dividers 2 and 2 'cross each other; the open partial areas 4 and 4 ' are staggered.

Die Teilumlenkscheiben 3 können auch einen Winkel a mit der Querschnittsebene 3a - siehe Fig.2 - einschliessen. Dieser Winkel α wird mit Vorteil nicht grösser als 30° gewählt. Die Figuren 3 und 4 zeigen weitere Ausführungsformen mit geneigten Flächen. Wird die Achse 5 als Vertikale verstanden, so stellt der Pfeil 6 in den Figuren 2 bis 4 jeweils die Falllinie einer Teilumlenkscheibe 3 dar. In Fig.2 ist dieser Pfeil 6 parallel zum oberen Trennsteg 2. Bei dem Ausführungsbeispiel der Fig.3 ist der Pfeil 6 tangential zu einem zur Achse 5 konzentrischen Kreiszylinder. Bei dem Ausführungsbeispiel der Fig.4 ist der Pfeil 6 radial nach aussen gerichtet.The partial deflection disks 3 can also have an angle a the cross-sectional plane 3a - see Fig. 2. This angle α advantageously does not exceed 30 ° chosen. Figures 3 and 4 show others Embodiments with inclined surfaces. If axis 5 understood as vertical, the arrow 6 in the Figures 2 to 4 each the fall line Partial deflection disk 3. In FIG. 2, this arrow is 6 parallel to the upper separator 2. At the The embodiment of Figure 3, the arrow 6 is tangential to a circular cylinder concentric to axis 5. At the embodiment of Figure 4, the arrow 6 is radial directed outwards.

Die Figuren 5a und 5b zeigen Mischelemente 1 und 1', bei denen jeweils zwei Trennstege 2 einem Abschnitt 1a bzw. 1b (in diesen Figuren nicht dargestellt) zugeordnet sind. Auf beiden Seiten jedes Trennstegs 2 ist genau eine offene Teilfläche 4 angeordnet. Das Mischelement 1' mit den offenen Teilflächen 4' stellt ein unmittelbar benachbartes Element des Mischelements 1 dar. Die offenen Teilflächen 4 und 4' sind gegeneinander versetzt angeordnet. Bei der Dreilöcher-Variante (Fig.5) sind die Formen der beiden Mischelemente 1 und 1' identisch und nicht spiegelbildlich wie bei der Zweilöcher-Variante (Fig.1).Figures 5a and 5b show mixing elements 1 and 1 ', at which each have two dividers 2 a section 1a or 1b (not shown in these figures). There is exactly one on both sides of each separating web 2 open partial area 4 arranged. The mixing element 1 'with the open partial areas 4 'immediately adjacent element of the mixing element 1. The open Partial areas 4 and 4 'are offset from one another arranged. In the three-hole variant (Fig. 5) Forms of the two mixing elements 1 and 1 'identical and not a mirror image like the two-hole version (Fig.1).

Für eine Herstellung des Dreilöcher-Mischkörpers mittels Spritzgusses kann man die Elemente in zwei Hälften teilen. Die Grenzen zwischen den Halbelementen sind in den Figuren 5a und 5b als strichpunktierte Linien 7 bzw. 7' angegeben. Monolithische Teilkörper, die jeweils eine Serie solcher Halbelemente umfassen, können auf einfache Weise mit zweitteiligen Werkzeugen hergestellt werden. Den gesamten Mischkörper erhält man durch Zusammenfügen zweier monolithischer Teilkörper.For a production of the three-hole mixing body by means of The elements can be injection molded in half divide. The boundaries between the half elements are in 5a and 5b as dash-dotted lines 7 and 7 'indicated. Monolithic partial bodies, each one Series of such half-elements can include simple Be produced with two-part tools. The entire mixing body is obtained by assembling two monolithic partial bodies.

Im Längsschnitt der Fig.6 ist gezeigt, dass die einzelnen Mischelemente 1 und 1' dicht aufeinander folgen. Es können allerdings auch Abstände zwischen einzelnen benachbarten Elementen oder auch zwischen allen Elementen vorgesehen sein. Beabstandet eingebaute Mischelemente können durch Verbindungsstücke zu einem monolithischen Mischer verbunden werden.6 shows that the individual Mixing elements 1 and 1 'follow each other closely. It can, however, also distance between individual neighboring elements or between all elements be provided. Spaced built-in mixing elements can be connected to a monolithic by connectors Mixer can be connected.

In Fig.6 ist zusätzlich mit Pfeilen 8, 8' und 8" der Strömungsverlauf des zu mischenden Mediums angedeutet. Der Pfeil 8' steht senkrecht zur Bildfläche und ist nach vorn gerichtet; der Pfeil 8" - ebenfalls senkrecht - ist nach hinten gerichtet. Das Bezugszeichen 9 weist auf eine Stelle hin, wo durch die Pfeile eine Erzeugung zweier Teilströme angedeutet ist.In Figure 6 is also with arrows 8, 8 'and 8 " Flow course of the medium to be mixed indicated. The arrow 8 'is perpendicular to the image surface and is after directed in front; the arrow 8 "- also vertical - is directed backwards. The reference number 9 indicates a Where the arrows create two Partial flows is indicated.

Die Teilumlenkscheiben 3 liegen mit Vorteil in einer gemeinsamen Ebene. Bei Vorliegen von mindestens zwei Trennstegen 2 pro Abschnitt (Dreilöcher-Variante) können mehrere Teilumlenkscheiben 3 eine gemeinsame Scheibe oder eine einzige Scheibe 30 (Vierlöcher-Variante) bilden: siehe die Figuren 5a und 5b und die entsprechenden Figuren 7a und 7b für die Vierlöcher-Variante.The partial deflection disks 3 are advantageously in one common level. If there are at least two Separators 2 per section (three-hole variant) can several partial deflection disks 3 a common disk or form a single disc 30 (four-hole variant): see Figures 5a and 5b and the corresponding Figures 7a and 7b for the four-hole variant.

In den Figuren 7a und 7b ist jeweils nur die einzige und gemeinsame Umlenkscheibe 30 bzw. 30' gezeigt. Die strichpunktierten Linien 23 stellen die unteren Kanten der oberen Trennstege dar. Wie schon bei der Zweilöcher-Variante sind bei der Vierlöcher-Variante die Formen benachbarter Mischelemente zueinander spiegelbildlich.In FIGS. 7a and 7b, only the only one and common deflection plate 30 and 30 'shown. The Dash-dotted lines 23 represent the lower edges the upper dividers. As with the two-hole version are the shapes of the four-hole version Adjacent mixing elements mirror each other.

Der erfindungsgemässe Mischer kann statt eines kreisförmigen Querschnitts auch einen Querschnitt mit einer anderen Form, beispielsweise einem Quadrat, haben. Die Winkel zwischen den sich kreuzenden Trennstegen 2, 2' können auch von 90° abweichen. Die Abschnitte 1a und 1b können verschieden lang sein. Die Länge der Abschnitte la und 1b liegt mit Vorteil im Bereich zwischen D/8 und D; sie beträgt vorzugsweise D/4. The mixer according to the invention can instead of one circular cross section also having a cross section another shape, for example a square. The angles between the crossing dividers 2, 2 ' can also deviate from 90 °. Sections 1a and 1b can be of different lengths. The length of the sections la and 1b is advantageously in the range between D / 8 and D; it is preferably D / 4.

In Fig.8 ist illustriert, was für Abweichungen von den einfachen, oben beschriebenen Formen beispielsweise denkbar sind: Zwischen den beabstandeten Mischelementen 1, 1' sind Verbindungselemente 35 angeordnet. Die Trennstege 2 weisen zusätzliche Elemente 25 zur Verstärkung oder Strömungslenkung auf. Trennstege 2' und 2" benachbarter Mischelemente 1' und 1" sind an der Stelle 29 ineinander gesteckt. Einzelne Trennstege 2 und Teilumlenkscheiben 3 sind nicht eben. Die Mischelemente 1 und 1' weisen verschieden viele Trennstege 2 und 2' pro Abschnitt 1a bzw. 1b auf, nämlich zwei bzw. einen. Ein Trennsteg 2 weist eine Aussparung 29 auf. Die Fig.8 ist lediglich als Veranschaulichung einzelner Merkmale zu verstehen; die besondere Kombination aller aufgeführter Merkmale im gleichen Mischer braucht nicht besonders vorteilhaft zu sein.FIG. 8 illustrates what deviations from the simple forms described above, for example are conceivable: between the spaced mixing elements 1, 1 'connecting elements 35 are arranged. The Separators 2 have additional elements 25 Reinforcement or flow control. Separators 2 'and 2 "adjacent mixing elements 1 'and 1" are on the Position 29 inserted into each other. Individual dividers 2 and Partial deflection disks 3 are not flat. The mixing elements 1 and 1 'have different numbers of dividers 2 and 2' per Section 1a or 1b, namely two or one. On Divider 2 has a recess 29. The Fig.8 is only as an illustration of individual features understand; the special combination of all listed Features in the same mixer do not need special to be beneficial.

Das Rohr 10 kann auch konisch ausgebildet sein tnicht dargestellt), so dass es sich in Fliessrichtung verjüngt; die Mischkörper 1, 1' müssen in diesem Fall dem ändernden Querschnitt entsprechend verschieden gross ausgebildet sein.The tube 10 can also not be conical shown) so that it tapers in the direction of flow; in this case the mixing bodies 1, 1 'have to be changed Cross-section correspondingly of different sizes his.

Das Diagramm in Fig.9 zeigt wie der Variationskoeffizient s /x für x = 0.5 gemäss den oben erwähnten Versuchen von L/D abhängt. x = 0.5 bedeutet, dass die Anteile der beiden zu mischenden Komponenten gleich gross sind. Die Bezugszeichen 1* bis 5* beziehen sich auf die Mischertypen, die in der oben stehenden Tabelle aufgeführt sind.The diagram in Fig. 9 shows how the coefficient of variation s / x For x = 0.5 depends on L / D according to the experiments mentioned above. x = 0.5 means that the proportions of the two components to be mixed are the same size. The reference numerals 1 * to 5 * refer to the mixer types listed in the table above.

Der erfindungsgemässe Mischer, der sich aus wenig Material monolithisch herstellen lässt, wird mit Vorteil aus einem kostengünstigen, verbrennbaren Kunststoff durch Spritzgiessen gefertigt. Dieser Mischer eignet sich besonders gut dazu, als Einwegartikel verwendet zu werden.The mixer according to the invention, which consists of little Having material made monolithic is an advantage from an inexpensive, combustible plastic Injection molding. This mixer is suitable especially good at being used as a disposable item become.

Der erfindungsgemässe Mischer kann auch zum Mischen turbulent strömender Medien verwendet werden.The mixer according to the invention can also be used for mixing turbulent flowing media can be used.

In den Ansprüchen sind die offenen Teilflächen 4, 4 als Ausnehmungen bezeichnet.In the claims, the open partial areas 4, 4 are as Designated recesses.

Claims (17)

  1. A static mixer with a plurality of mixing elements (1, 1') arranged consecutively in a tube (10) which have deflection plates (30, 30') arranged transversely to the direction of flow with at least two cut-outs (4, 4') in each case and which have partial deflection plates (3, 3'), with at least one separating flange (2, 2') going from tube wall to tube wall being provided on the upstream and downstream side of each deflection plate, the separating flange on the upstream side crossing the separating flange on the downstream side, each separating flange on each side being adjacent precisely one cut-out and - seen in the direction of flow - with each deflection plate covering the cut-outs of the following deflection plate.
  2. Mixer in accordance with claim 1, characterised in that the tube cross section is subdivided by the separating flanges (2, 2') into subareas of at least approximately the same size.
  3. Mixer in accordance with claim 1 or 2, characterised in that the separating flanges (2) cross one another at an angle of 90° on the upstream and downstream sides.
  4. Mixer in accordance with one of the claims 1 to 3, characterised in that the heights of the separating flanges (2) are at least approximately of the same size.
  5. Mixer in accordance with one of the claims 1 to 4 characterised in that the length of one mixing element (1) is smaller than the largest tube diameter, preferably smaller than half of the largest tube diameter.
  6. Mixer in accordance with one of the claims 1 to 7, characterised in that the partial deflection plates (3) are inclined with respect to the cross-sectional plane (3a); and in that angle (α) between partial deflection plate and cross-sectional plane is less than 30°.
  7. Mixer in accordance with one of the claims 1 to 6, characterised in that several successive mixing elements (1, 1') are present in the form of a monolithic structure, especially one produced by injection moulding.
  8. Mixer in accordance with one of the claims 1 to 7, characterised in that a spacing is provided between at least two neighbouring mixing elements (1, 1').
  9. Mixer in accordance with claim 8, characterised in that connection elements (35) are arranged between spaced apart mixing elements (1, 1').
  10. Mixer in accordance with one of the claims 1 to 9, characterised in that the tube (10) has a square or circular cross section.
  11. Mixer in accordance with one of the claims 1 to 10, characterised in that at least individual separating flanges (2, 2') and/or partial deflection plates (3, 3') have additional elements (25) for the purpose of strengthening or guiding the flow.
  12. Mixer in accordance with one of the claims 1 to 11, characterised in that the separating flanges (2, 2') of neighbouring mixing elements (1, 1') are inserted (29) into one another.
  13. Mixer in accordance with one of the claims 1 to 12, characterised in that at least individual separating flanges (2, 2') and/or partial deflection plates (3, 3') are not planar.
  14. Mixer in accordance with one of the claims 1 to 13, characterised in that at least individual separating flanges (2, 2') and/or deflection plates (3, 3') have additional cut-outs (26).
  15. Mixer in accordance with one of the claims 1 to 14, characterised in that the tube (10) is conically shaped and tapers in the direction of flow and the mixing bodies (1, 1') are constructed in differing sizes corresponding to the changing cross section.
  16. Use of a mixer in accordance with one of the claims 1 to 15, for mixing viscous materials, especially plastics, resins or glues, where the Reynolds number for each of the materials flowing through the mixer is less than 1.
  17. Use of a mixer in accordance with one of the claims 1 to 15 as a disposable article, where the mixer is constructed of an economical, combustible plastic by injection moulding.
EP95810418A 1995-06-21 1995-06-21 Mixer with tubular housing Expired - Lifetime EP0749776B1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP95810418A EP0749776B1 (en) 1995-06-21 1995-06-21 Mixer with tubular housing
DE59508992T DE59508992D1 (en) 1995-06-21 1995-06-21 Mixer arranged in a tube
AT95810418T ATE198839T1 (en) 1995-06-21 1995-06-21 MIXER PLACED IN A TUBE
ES95810418T ES2155509T3 (en) 1995-06-21 1995-06-21 TUBE SHAPED BODY MIXER.
DE29522199U DE29522199U1 (en) 1995-06-21 1995-06-21 Mixer arranged in a tube
TW085105453A TW315314B (en) 1995-06-21 1996-05-08
CA002178065A CA2178065C (en) 1995-06-21 1996-06-03 A mixer arranged in a tube
US08/660,434 US5944419A (en) 1995-06-21 1996-06-07 Mixing device
KR1019960020691A KR100420822B1 (en) 1995-06-21 1996-06-11 Mixer disposed in the tube
CN96111003A CN1052171C (en) 1995-06-21 1996-06-19 Mixer fitted in a tube
JP15997396A JP4283901B2 (en) 1995-06-21 1996-06-20 Mixer placed in the tube
BR9602858A BR9602858A (en) 1995-06-21 1996-06-20 Mixer placed in a tube and use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95810418A EP0749776B1 (en) 1995-06-21 1995-06-21 Mixer with tubular housing

Publications (2)

Publication Number Publication Date
EP0749776A1 EP0749776A1 (en) 1996-12-27
EP0749776B1 true EP0749776B1 (en) 2001-01-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810418A Expired - Lifetime EP0749776B1 (en) 1995-06-21 1995-06-21 Mixer with tubular housing

Country Status (11)

Country Link
US (1) US5944419A (en)
EP (1) EP0749776B1 (en)
JP (1) JP4283901B2 (en)
KR (1) KR100420822B1 (en)
CN (1) CN1052171C (en)
AT (1) ATE198839T1 (en)
BR (1) BR9602858A (en)
CA (1) CA2178065C (en)
DE (2) DE29522199U1 (en)
ES (1) ES2155509T3 (en)
TW (1) TW315314B (en)

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KR100420822B1 (en) 2004-05-22
DE59508992D1 (en) 2001-03-01
JPH09901A (en) 1997-01-07
EP0749776A1 (en) 1996-12-27
JP4283901B2 (en) 2009-06-24
BR9602858A (en) 1998-04-22
KR970000319A (en) 1997-01-21
DE29522199U1 (en) 2000-08-17
CN1052171C (en) 2000-05-10
ATE198839T1 (en) 2001-02-15
US5944419A (en) 1999-08-31
TW315314B (en) 1997-09-11
CA2178065C (en) 2000-05-30
CN1148518A (en) 1997-04-30
ES2155509T3 (en) 2001-05-16

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