EP1123730A2 - Static mixer - Google Patents

Static mixer Download PDF

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Publication number
EP1123730A2
EP1123730A2 EP01101637A EP01101637A EP1123730A2 EP 1123730 A2 EP1123730 A2 EP 1123730A2 EP 01101637 A EP01101637 A EP 01101637A EP 01101637 A EP01101637 A EP 01101637A EP 1123730 A2 EP1123730 A2 EP 1123730A2
Authority
EP
European Patent Office
Prior art keywords
webs
static mixer
grids
mixer according
grid
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.)
Granted
Application number
EP01101637A
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German (de)
French (fr)
Other versions
EP1123730B1 (en
EP1123730A3 (en
Inventor
Heinrich Schuchardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer Chemtech AG
Original Assignee
Bayer AG
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Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Priority to DK01101637T priority Critical patent/DK1123730T3/en
Publication of EP1123730A2 publication Critical patent/EP1123730A2/en
Publication of EP1123730A3 publication Critical patent/EP1123730A3/en
Application granted granted Critical
Publication of EP1123730B1 publication Critical patent/EP1123730B1/en
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Classifications

    • 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
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0058—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having different orientations to each other or crossing the conduit for the other heat exchange medium
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
    • 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
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • 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
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4319—Tubular elements
    • 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
    • B01F35/90—Heating or cooling systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0052—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for mixers

Definitions

  • the invention relates to a static mixer consisting of at least one Mixer insert, optionally a support and optionally a hold-down device, with an enclosing housing, the mixer insert consisting of a variety of nested grids, parallel to each other, one on top of the other lying layers arranged webs is composed and wherein the Grid against each other by an angle ⁇ around the main flow direction through the Mixers are arranged twisted.
  • a pump presses the liquid through static mixer internals provided pipe, the that of the main flow axis the following liquid is divided into partial flows, depending on the type of internals be swirled and mixed.
  • Kenics mixers With the so-called Kenics mixers (see “Mixing during manufacture and processing von Kunststoffe ", publisher VDI Ges. Kunststofftechnik, VDI publishing house 1986, pp. 238-241), the liquid flow of the mixed material is changed into a Pipe installed divider divided into partial flows. This divider is around that Tube axis twisted. A vortex-shaped flow arises in each of the partial flows, which leads to the redistribution of the liquid in the cross section of the tube. Usually several such mixing elements are arranged one behind the other to form the liquid to share again and again and to achieve a sufficient mixer result. A satisfactory mixture is typically only after 10 to 12 mixing elements reached.
  • SMX mixers consist of two or more mutually perpendicular grids of parallel Metal strips that are welded together at their crossing points and in are made at an angle to the main flow direction of the mix, in order to to divide and mix the liquid into partial flows.
  • the manufacturing effort for this mixer is very high because of the many welded joints to be made.
  • a single mixing element is unsuitable as a mixer because it only mixes takes place along a preferred direction transverse to the main flow direction. Therefore several mixing elements, which are rotated by 90 ° to each other, must be used one after the other to be ordered. Good mixing typically requires 5 to 6 mixer elements arranged one behind the other.
  • An SMX mixer only points two against each other grid of parallel webs rotated by 180 °. These grids consist of layers more equidistant Walkways. Adjacent layers are aligned. Any location represents a plane of symmetry that is not crossed when mixing.
  • the object of the invention is to provide a static mixer which the Mixing effect of the known mixer, especially the SMX mixer, exceeds and can be produced with a minimal manufacturing outlay.
  • a static mixer at least from a housing with possibly a support and possibly a hold-down and with a mixer insert consisting of at least three against each other parallel webs twisted around the direction of flow, leading to Flow direction are set.
  • the invention relates to a static mixer consisting of at least one Mixer insert, optionally a support and optionally a hold-down device, with an enclosing housing, the mixer insert consisting of at least three nested grids of parallel to each other, one on top of the other lying layers arranged webs is composed and wherein the Grid against each other by an angle ⁇ around the main flow direction through the Mixers are arranged twisted.
  • a preferred embodiment of the static mixer is characterized in that that the webs to the main flow direction through the mixer by an angle ⁇ preferably from 30 to 60 °.
  • the webs are a grid through the webs of the other grilles, the housing and the end webs fixed in position by the support and / or the hold-down device.
  • the number of grids in the mixer insert is preferably static Mixer three or four.
  • the static mixer is particularly preferably rotationally symmetrical the number of grids built up.
  • a preferred embodiment of the static mixer is characterized in that that three grids with parallel webs are built from parallel layers of webs are, with adjacent layers each sitting on a gap.
  • Another preferred embodiment of the static mixer is characterized in that that four grids with parallel webs are built from parallel layers of webs are, with adjacent layers aligned with each other.
  • adjacent lattice planes are of a grid is offset from each other and the number of grids is four.
  • the webs are designed as hollow webs which open into the housing wall, wherein the housing wall is a casing with feeds divided into several chambers and has derivatives for a heat transfer medium.
  • Another object of the invention is the use of the invention static mixer for mixing highly viscous mix, in particular Polymer melts or polymer solutions with additives, other polymers, Dyes, pigments or stabilizers.
  • a static mixer according to the invention is in a perspective View shown; the housing 1 is shown cut away.
  • Figure 4 shows a view along the webs of a grid. It can be seen that the Bars 2a, 2b, 2c through the bars 6a, 6b, 6c and 7a, 7b, 7c of the other grids in their Location are fixed. Bridges are only added in the top and bottom layers fixed by the support 3 or the hold-down device 4 (not shown in FIG. 4).
  • Figure 5 shows an arrangement of webs for a mixer insert with a square cross-section and with fourfold rotational symmetry of the webs to each other.
  • This mixer insert requires a housing 1 with a square cross section.
  • FIG. 6 shows a mixer / heat exchanger consisting of a Outer housing 10 and an inner housing 1, with nozzle 13 for the product supply and nozzle 14 for product removal, and a supply line 11 and a discharge line 12 for a temperature control medium. Walls between outer housing 10 and inner housing 1 divide the space into two chambers 15 and 16 for the supply and discharge of the heat transfer medium.
  • FIG. 9 shows the arrangement of the tubes Bars 17 inside the mixer / heat exchanger. It is marked by four grids with parallel webs, which are at 90 ° to each other Flow direction are arranged rotated.
  • a particularly narrow pipe arrangement is achieved in that adjacent grid levels of a grid are arranged offset from one another.
  • Figure 10 shows an alternative arrangement of the hollow webs of the mixer insert for a mixer / heat exchanger as shown in Example 4. Adjacent grid levels aligned with each other, the number of grids is four.
  • Such a mixer / heat exchanger is particularly suitable for 2-phase flows. Since the distance between the pipes across the flow direction is large compared to the distance in the main flow direction, there are large flow channels for the product. The arrangement of the tubes results in a flow in these flow channels Swirl flow with separation into a gas flow inside the channel and a liquid flow on the outside of the channel. This can cause pressure loss when Flow through such a mixer / heat exchanger can be kept small.

Abstract

A static mixer is disclosed comprising a mixer insert and an enclosing housing having a central axis. The insert includes at least three interleaved grids and each of the grids includes a plurality of layers that are superposed parallel one to the others. Each of the layers includes a plurality of bars that are mutually parallel one to the others. There is an angle of 30 to 60 degrees between each of the bars and the axis.

Description

Die Erfindung betrifft einen statischen Mischer, bestehend wenigstens aus einem Mischereinsatz, gegebenenfalls einem Auflager und gegebenenfalls einem Niederhalter, mit einem umschließenden Gehäuse, wobei der Mischereinsatz aus einer Vielzahl von ineinander verschachtelten Gittern von zueinander parallelen, in übereinander liegenden Lagen angeordneten Stegen zusammengesetzt ist und wobei die Gitter gegeneinander um einen Winkel α um die Hauptströmungsrichtung durch den Mischer verdreht angeordnet sind.The invention relates to a static mixer consisting of at least one Mixer insert, optionally a support and optionally a hold-down device, with an enclosing housing, the mixer insert consisting of a variety of nested grids, parallel to each other, one on top of the other lying layers arranged webs is composed and wherein the Grid against each other by an angle α around the main flow direction through the Mixers are arranged twisted.

Zum Mischen von insbesondere hochviskosen Flüssigkeiten werden vielfach statische Mischer eingesetzt. Eine Pumpe drückt die Flüssigkeit dabei durch ein mit statischen Mischereinbauten versehenes Rohr, wobei die der Hauptströmungsachse folgende Flüssigkeit in Teilströme aufgeteilt wird, die je nach Art der Einbauten miteinander verwirbelt und vermischt werden.There are many ways to mix particularly viscous liquids static mixer used. A pump presses the liquid through static mixer internals provided pipe, the that of the main flow axis the following liquid is divided into partial flows, depending on the type of internals be swirled and mixed.

Beispielhaft für statische Mischer seien die zwei folgenden Vorrichtungen genannt:The following two devices may be mentioned as examples of static mixers:

Bei den sogenannten Kenics-Mischern (siehe "Mischen beim Herstellen und Verarbeiten von Kunststoffen", Herausgeber VDI Ges. Kunststofftechnik, VDI-Verlag 1986, S. 238-241) wird die Flüssigkeitsströmung des Mischgutes durch ein in ein Rohr eingebautes Trennblech in Teilströme geteilt. Dieses Trennblech ist um die Rohrachse tordiert. In jedem der Teilströme entsteht eine wirbelförmige Strömung, die zur Umverteilung der Flüssigkeit im Querschnitt des Rohres führt. Üblicherweise werden mehrere solcher Mischelemente hintereinander angeordnet, um die Flüssigkeit immer wieder neu zu teilen und ein hinreichendes Mischerergebnis zu erzielen. Eine befriedigende Mischung wird typischerweise erst nach 10 bis 12 Mischelementen erreicht. With the so-called Kenics mixers (see "Mixing during manufacture and processing von Kunststoffe ", publisher VDI Ges. Kunststofftechnik, VDI publishing house 1986, pp. 238-241), the liquid flow of the mixed material is changed into a Pipe installed divider divided into partial flows. This divider is around that Tube axis twisted. A vortex-shaped flow arises in each of the partial flows, which leads to the redistribution of the liquid in the cross section of the tube. Usually several such mixing elements are arranged one behind the other to form the liquid to share again and again and to achieve a sufficient mixer result. A satisfactory mixture is typically only after 10 to 12 mixing elements reached.

Die weiter bekannten sogenannten SMX-Mischer (vgl. Patentschrift US 40 62 524) bestehen aus zwei oder mehr zueinander senkrecht stehenden Gittern von parallelen Blechstreifen, die an ihren Kreuzungspunkten miteinander verschweißt sind und in einem Winkel gegen die Hauptströmungsrichtung des Mischgutes angestellt sind, um die Flüssigkeit in Teilströme zu teilen und zu mischen. Der Herstellungsaufwand für diese Mischer ist wegen der vielen zu tätigenden Schweißverbindungen sehr hoch. Ein einzelnes Mischelement ist als Mischer ungeeignet, da eine Durchmischung nur entlang einer Vorzugsrichtung quer zur Hauptströmungsrichtung erfolgt. Deshalb müssen mehrere Mischelemente, die zueinander um 90° verdreht sind, hintereinander angeordnet werden. Eine gute Durchmischung erfordert typischerweise 5 bis 6 hintereinander angeordnete Mischerelemente.The further known so-called SMX mixers (cf. patent specification US 40 62 524) consist of two or more mutually perpendicular grids of parallel Metal strips that are welded together at their crossing points and in are made at an angle to the main flow direction of the mix, in order to to divide and mix the liquid into partial flows. The manufacturing effort for this mixer is very high because of the many welded joints to be made. A single mixing element is unsuitable as a mixer because it only mixes takes place along a preferred direction transverse to the main flow direction. Therefore several mixing elements, which are rotated by 90 ° to each other, must be used one after the other to be ordered. Good mixing typically requires 5 to 6 mixer elements arranged one behind the other.

Dies lässt sich wie folgt erklären: Ein SMX-Mischer weist nur zwei gegeneinander um 180° verdrehte Gitter paralleler Stege auf. Diese Gitter bestehen aus Lagen äquidistanter Stege. Benachbarte Lagen sind zueinander fluchtend angeordnet. Jede Lage stellt eine Symmetrieebene dar, die bei der Mischung nicht überquert wird.This can be explained as follows: An SMX mixer only points two against each other grid of parallel webs rotated by 180 °. These grids consist of layers more equidistant Walkways. Adjacent layers are aligned. Any location represents a plane of symmetry that is not crossed when mixing.

Aufgabe der Erfindung ist es, einen statischen Mischer bereit zu stellen, der die Mischwirkung der bekannten Mischer, insbesondere des SMX-Mischers, übertrifft und mit einem minimalen Fertigungsaufwand herzustellen ist.The object of the invention is to provide a static mixer which the Mixing effect of the known mixer, especially the SMX mixer, exceeds and can be produced with a minimal manufacturing outlay.

Die Aufgabe wird erfindungsgemäß gelöst durch einen statischen Mischer bestehend wenigstens aus einem Gehäuse mit gegebenenfalls einem Auflager und eventuell einem Niederhalter und mit einem Mischereinsatz bestehend aus mindestens drei gegeneinander um die Strömungsrichtung verdrehten Gittern paralleler Stege, die zur Strömungsrichtung angestellt sind.The object is achieved according to the invention by a static mixer at least from a housing with possibly a support and possibly a hold-down and with a mixer insert consisting of at least three against each other parallel webs twisted around the direction of flow, leading to Flow direction are set.

Gegenstand der Erfindung ist ein Statischer Mischer bestehend wenigstens aus einem Mischereinsatz, gegebenenfalls einem Auflager und gegebenenfalls einem Niederhalter, mit einem umschließenden Gehäuse, wobei der Mischereinsatz aus mindestens drei ineinander verschachtelten Gittern von zueinander parallelen, in übereinander liegenden Lagen angeordneten Stegen zusammengesetzt ist und wobei die Gitter gegeneinander um einen Winkel α um die Hauptströmungsrichtung durch den Mischer verdreht angeordnet sind.The invention relates to a static mixer consisting of at least one Mixer insert, optionally a support and optionally a hold-down device, with an enclosing housing, the mixer insert consisting of at least three nested grids of parallel to each other, one on top of the other lying layers arranged webs is composed and wherein the Grid against each other by an angle α around the main flow direction through the Mixers are arranged twisted.

Bei dieser Konstruktion können die Stege eines Gitters durch die Stege der anderen Gitter in ihrer Position gehalten werden ohne dass sie miteinander verbunden werden müssen. Deshalb ist kein zusätzlicher Aufwand für das Zusammenschweißen der Stege bei dieser Konstruktionsweise erforderlich.With this construction, the bars of one grating can pass through the bars of the other Grids are held in position without being connected have to. Therefore, there is no additional effort for welding the Bridges required in this construction.

Auf Grund der erfindungsgemäßen Anordnung gibt es keine Spiegelsymmetrieebene, so dass die Mischwirkung biaxial erfolgt.Because of the arrangement according to the invention, there is no mirror symmetry plane, so that the mixing effect is biaxial.

Eine bevorzugte Ausführung des statischen Mischers ist dadurch gekennzeichnet, dass die Stege zur Hauptströmungsrichtung durch den Mischer um einen Winkel β bevorzugt von 30 bis 60°, angestellt sind.A preferred embodiment of the static mixer is characterized in that that the webs to the main flow direction through the mixer by an angle β preferably from 30 to 60 °.

In einer bevorzugten Variante des statischen Mischers sind die Stege eines Gitters durch die Stege der anderen Gitter, das Gehäuse sowie bei den endständigen Stegen durch das Auflager und/oder den Niederhalter in ihrer Position fixiert.In a preferred variant of the static mixer, the webs are a grid through the webs of the other grilles, the housing and the end webs fixed in position by the support and / or the hold-down device.

Vorzugsweise beträgt die Anzahl der Gitter des Mischereinsatzes des statischen Mischers drei oder vier.The number of grids in the mixer insert is preferably static Mixer three or four.

Insbesondere bevorzugt ist der statische Mischer rotationssymmetrisch entsprechend der Anzahl der Gitter aufgebaut.The static mixer is particularly preferably rotationally symmetrical the number of grids built up.

Eine bevorzugte Ausführung des statischen Mischers ist dadurch gekennzeichnet, dass drei Gitter mit parallelen Stegen aus parallelen Lagen von Stegen aufgebaut sind, wobei jeweils benachbarte Lagen zueinander auf Lücke sitzen. A preferred embodiment of the static mixer is characterized in that that three grids with parallel webs are built from parallel layers of webs are, with adjacent layers each sitting on a gap.

Eine andere bevorzugte Ausführung des statischen Mischers ist dadurch gekennzeichnet, dass vier Gitter mit parallelen Stegen aus parallelen Lagen von Stegen aufgebaut sind, wobei benachbarte Lagen miteinander fluchten.Another preferred embodiment of the static mixer is characterized in that that four grids with parallel webs are built from parallel layers of webs are, with adjacent layers aligned with each other.

In einer weiteren bevorzugten Form des statischen Mischers sind benachbarte Gitterebenen eines Gitters gegeneinander versetzt angeordnet und die Anzahl der Gitter beträgt vier.In a further preferred form of the static mixer, adjacent lattice planes are of a grid is offset from each other and the number of grids is four.

Wenn der statische Mischer auch als Wärmetauscher verwendet werden soll, können die Stege als Hohlstege ausgebildet werden, die in der Gehäusewand münden, wobei die Gehäusewand eine in mehrere Kammern geteilte Ummantelung mit Zuführungen und Ableitungen für ein Wärmeträgermedium aufweist.If the static mixer is also to be used as a heat exchanger, you can the webs are designed as hollow webs which open into the housing wall, wherein the housing wall is a casing with feeds divided into several chambers and has derivatives for a heat transfer medium.

Weiterer Gegenstand der Erfindung ist die Verwendung des erfindungsgemäßen statischen Mischers zur Mischung von hochviskosem Mischgut, insbesondere von Polymerschmelzen oder Polymerlösungen mit Zusatzstoffen, anderen Polymeren, Farbstoffen, Pigmenten oder Stabilisierungsmitteln.Another object of the invention is the use of the invention static mixer for mixing highly viscous mix, in particular Polymer melts or polymer solutions with additives, other polymers, Dyes, pigments or stabilizers.

Die Erfindung wird nachfolgend anhand der Figuren durch die Beispiele, welche jedoch keine Beschränkung der Erfindung darstellen, weiter erläutert.The invention is explained below with reference to the figures by the examples which however, do not constitute a limitation of the invention, explained further.

Es zeigen:

Figur 1a
einen erfindungsgemäßen Mischer in einer perspektivischen Ansicht, dabei ist das Gehäuse geschnitten dargestellt.
Figur 1b
den Mischer aus Figur 1a in der Draufsicht
Figur 2
das Gehäuse des Mischers aus Figur 1 im Längsschnitt
Figur 3
die Anordnung der Stege innerhalb des Mischers aus Figur 1a in perspektivischer Ansicht
Figur 4
die Anordnung der Stege innerhalb des Mischers aus Figur la bei Blickrichtung entlang der Stege
Figur 5
eine Anordnung von Stegen für einen Mischer mit einem quadratischen Querschnitt und mit vierzähliger Rotationssymmetrie
Figur 6
die Seitenansicht eines erfindungsgemäßen Mischers in der Funktion als Wärmetauscher
Figur 7
den Querschnitt durch den Mischer/Wärmetauscher aus Fig. 6
Figur 8
den Längsschnitt durch den Mischer/Wärmetauscher aus Fig. 6
Figur 9
den Mischereinsatz im Mischer/Wärmetauscher aus Fig. 6
Figur 10
einen alternativen Mischereinsatz mit vier Gittern
Show it:
Figure 1a
a mixer according to the invention in a perspective view, the housing is shown in section.
Figure 1b
the mixer of Figure 1a in plan view
Figure 2
the housing of the mixer from Figure 1 in longitudinal section
Figure 3
the arrangement of the webs within the mixer of Figure 1a in a perspective view
Figure 4
the arrangement of the webs within the mixer of Figure la when looking along the webs
Figure 5
an arrangement of webs for a mixer with a square cross-section and with four-fold rotational symmetry
Figure 6
the side view of a mixer according to the invention in the function as a heat exchanger
Figure 7
the cross section through the mixer / heat exchanger from FIG. 6
Figure 8
the longitudinal section through the mixer / heat exchanger from FIG. 6
Figure 9
the mixer insert in the mixer / heat exchanger from FIG. 6
Figure 10
an alternative mixer insert with four grids

Beispiele:Examples: Beispiel 1example 1

In Figur 1a ist ein erfindungsgemäßer statischer Mischer in einer perspektivischen Ansicht dargestellt; dabei ist das Gehäuse 1 aufgeschnitten dargestellt.In Figure 1a, a static mixer according to the invention is in a perspective View shown; the housing 1 is shown cut away.

In der Draufsicht auf den Mischer gemäß Figur 1b ist zu erkennen, dass der Mischer dreifach rotationssymmetrisch um die Strömungsmischung aufgebaut ist.In the top view of the mixer according to FIG. 1b it can be seen that the mixer is constructed three times rotationally symmetrical around the flow mixture.

Im Längsschnitt des Gehäuses 1 in Figur 2 ist die Anordnung des Auflagers 3 und des Niederhalters 4 zu erkennen.In the longitudinal section of the housing 1 in Figure 2, the arrangement of the support 3 and the hold-down 4 can be seen.

In der Darstellung des bloßen Mischereinsatzes nach Figur 3 ist zu erkennen, dass die drei ineinander verschachtelten Gitter mit parallelen Stegen aus parallelen Lagen 5a, 5b von Stegen 2a, 2b, 2c; 6a, 6b, 6c; 7a, 7b, 7c aufgebaut sind, wobei benachbarte Lagen 5a (mit den Stegen 2a, 2b, 2c) und 5b (mit den Stegen 12a, 12b, 12c) zueinander auf Lücke sitzen.In the representation of the mere mixer insert according to Figure 3 it can be seen that the three nested grids with parallel webs of parallel layers 5a, 5b of webs 2a, 2b, 2c; 6a, 6b, 6c; 7a, 7b, 7c are constructed, with neighboring ones Layers 5a (with the webs 2a, 2b, 2c) and 5b (with the webs 12a, 12b, 12c) to each other to sit on gap.

Figur 4 zeigt einen Blick entlang der Stege eines Gitters. Es ist zu erkennen, dass die Stege 2a, 2b, 2c durch die Stege 6a, 6b, 6c bzw. 7a, 7b, 7c der anderen Gitter in ihrer Lage fixiert sind. Nur in der obersten und untersten Lage werden Stege zusätzlich durch das Auflager 3 bzw. den Niederhalter 4 (in Fig. 4 nicht gezeichnet) fixiert.Figure 4 shows a view along the webs of a grid. It can be seen that the Bars 2a, 2b, 2c through the bars 6a, 6b, 6c and 7a, 7b, 7c of the other grids in their Location are fixed. Bridges are only added in the top and bottom layers fixed by the support 3 or the hold-down device 4 (not shown in FIG. 4).

Beispiel 2Example 2

Figur 5 zeigt eine Anordnung von Stegen für einen Mischereinsatz mit einem quadratischen Querschnitt und mit vierzähliger Rotationssymmetrie der Stege zueinander. Dieser Mischereinsatz erfordert ein Gehäuse 1 mit quadratischem Querschnitt. Figure 5 shows an arrangement of webs for a mixer insert with a square cross-section and with fourfold rotational symmetry of the webs to each other. This mixer insert requires a housing 1 with a square cross section.

Beispiel 3Example 3

Die Figuren 6, 7 und 8 zeigen einen Mischer/Wärmetauscher bestehend aus einem Außengehäuse 10 und einem Innengehäuse 1, mit Stutzen 13 für die Produktzufuhr und Stutzen 14 für die Produktabfuhr, sowie einer Zuleitung 11 und einer Ableitung 12 für ein Temperiermedium. Wände zwischen Außengehäuse 10 und Innengehäuse 1 teilen den Zwischenraum in zwei Kammern 15 und 16 für die Zu- und Ableitung des Wärmeträgermediums. Figur 9 zeigt die Anordnung der als Rohre ausgebildeten Stege 17 im Inneren des Mischer/Wärmetauschers. Sie ist gekennzeichnet durch vier Gitter mit parallelen Stegen, die gegeneinander um 90° bezüglich der Strömungsrichtung verdreht angeordnet sind.Figures 6, 7 and 8 show a mixer / heat exchanger consisting of a Outer housing 10 and an inner housing 1, with nozzle 13 for the product supply and nozzle 14 for product removal, and a supply line 11 and a discharge line 12 for a temperature control medium. Walls between outer housing 10 and inner housing 1 divide the space into two chambers 15 and 16 for the supply and discharge of the heat transfer medium. FIG. 9 shows the arrangement of the tubes Bars 17 inside the mixer / heat exchanger. It is marked by four grids with parallel webs, which are at 90 ° to each other Flow direction are arranged rotated.

Eine besonders enge Rohranordnung wird dadurch erreicht, dass benachbarte Gitterebenen eines Gitters gegeneinander versetzt angeordnet sind.A particularly narrow pipe arrangement is achieved in that adjacent grid levels of a grid are arranged offset from one another.

Beispiel 4Example 4

Figur 10 zeigt eine alternative Anordnung der Hohlstege des Mischereinsatzes für einen Mischer/Wärmetauscher wie in Beispiel 4 dargestellt. Benachbarte Gitterebenen fluchten miteinander, die Anzahl der Gitter beträgt vier.Figure 10 shows an alternative arrangement of the hollow webs of the mixer insert for a mixer / heat exchanger as shown in Example 4. Adjacent grid levels aligned with each other, the number of grids is four.

Solch ein Mischer/Wärmetauscher ist besonders für 2-phasige Strömungen geeignet. Da der Abstand der Rohre quer zur Strömungsrichtung groß ist gegenüber dem Abstand in Hauptströmungsrichtung, ergeben sich große Strömungskanäle für das Produkt. Durch die Anordnung der Rohre ergibt sich in diesen Strömungskanälen eine Drallströmung mit Trennung in eine Gasströmung im Kanalinneren und eine Flüssigkeitsströmung an der Außenseite des Kanals. Dadurch kann der Druckverlust beim Durchströmen eines solchen Mischer/Wärmetauschers klein gehalten werden.Such a mixer / heat exchanger is particularly suitable for 2-phase flows. Since the distance between the pipes across the flow direction is large compared to the distance in the main flow direction, there are large flow channels for the product. The arrangement of the tubes results in a flow in these flow channels Swirl flow with separation into a gas flow inside the channel and a liquid flow on the outside of the channel. This can cause pressure loss when Flow through such a mixer / heat exchanger can be kept small.

Claims (13)

Statischer Mischer bestehend wenigstens aus einem Mischereinsatz (2), gegebenenfalls einem Auflager (3) und gegebenenfalls einem Niederhalter (4), mit einem umschließenden Gehäuse (1), wobei der Mischereinsatz (2) aus mindestens drei ineinander verschachtelten Gittern von zueinander parallelen, in übereinander liegenden Lagen (5a, 5b) angeordneten Stegen (2a, 2b, 2c; 12a, 12b, 12c) zusammengesetzt ist und wobei die Gitter gegeneinander um einen Winkel α um die Hauptströmungsrichtung durch den Mischer verdreht angeordnet sind.Static mixer consisting of at least one mixer insert (2), if necessary a support (3) and optionally a hold-down device (4) with an enclosing housing (1), the mixer insert (2) consisting of at least three nested grids of mutually parallel, in webs (2a, 2b, 2c; 12a, 12b, 12c) and the grids are mutually one Angle α rotated around the main flow direction through the mixer are. Statischer Mischer nach Anspruch 1, dadurch gekennzeichnet, dass die Stege (2a, 2b, 2c; 12a, 12b, 12c) zur Hauptströmungsrichtung durch den Mischer um einen Winkel β angestellt sind.Static mixer according to claim 1, characterized in that the webs (2a, 2b, 2c; 12a, 12b, 12c) to the main flow direction through the mixer are set at an angle β. Statischer Mischer nach Anspruch 2, dadurch gekennzeichnet, dass der Winkel β von 30 bis 60° beträgt.Static mixer according to claim 2, characterized in that the Angle β is from 30 to 60 °. Statischer Mischer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Stege (2a, 2b, 2c; 12a, 12b, 12c) eines Gitters durch die Stege (6a, 6b, 6c, 7a, 7b, 7c) der anderen Gitter, das Gehäuse (1) sowie bei den endständigen Stegen (2a, 2b, 2c) durch das Auflager (3) und/oder den Niederhalter (4) in ihrer Position fixiert sind.Static mixer according to one of claims 1 to 3, characterized in that that the webs (2a, 2b, 2c; 12a, 12b, 12c) of a grid through the webs (6a, 6b, 6c, 7a, 7b, 7c) of the other grilles, the housing (1) and the terminal webs (2a, 2b, 2c) through the support (3) and / or the hold-down device (4) are fixed in their position. Statischer Mischer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Anzahl der Gitter drei beträgt.Static mixer according to one of claims 1 to 4, characterized in that the number of grids is three. Statischer Mischer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Anzahl der Gitter vier beträgt. Static mixer according to one of claims 1 to 4, characterized in that the number of grids is four. Statischer Mischer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Mischer rotationssymmetrisch entsprechend der Anzahl der Gitter aufgebaut ist.Static mixer according to one of claims 1 to 6, characterized in that the mixer is rotationally symmetrical according to the number of Grid is built. Statischer Mischer nach Anspruch 5, dadurch gekennzeichnet, dass die drei Gitter mit parallelen Stegen (2a, 2b, 2c; 6a, 6b, 6c, 7a, 7b, 7c) aus parallelen Lagen von Stegen (2a, 2b, 2c; 12a, 12b, 12c) aufgebaut sind, wobei jeweils benachbarte Lagen zueinander auf Lücke sitzen.Static mixer according to claim 5, characterized in that the three Grid with parallel webs (2a, 2b, 2c; 6a, 6b, 6c, 7a, 7b, 7c) made of parallel Layers of webs (2a, 2b, 2c; 12a, 12b, 12c) are constructed, whereby each Adjacent layers sit on a gap. Statischer Mischer nach Anspruch 6, dadurch gekennzeichnet, dass die vier Gitter mit parallelen Stegen aus parallelen Lagen von Stegen aufgebaut sind, wobei benachbarte Lagen miteinander fluchten.Static mixer according to claim 6, characterized in that the four Grids with parallel webs are made up of parallel layers of webs, with neighboring layers aligned. Statischer Mischer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Stege (2a, 2b, 2c; 12a, 12b, 12c) als Hohlstege ausgebildet sind und in der Gehäusewand münden, wobei die Gehäusewand eine in mehrere Kammern geteilte Ummantelung mit Zuführungen und Ableitungen für ein Wärmeträgermedium aufweist.Static mixer according to one of claims 1 to 9, characterized in that that the webs (2a, 2b, 2c; 12a, 12b, 12c) are designed as hollow webs and open into the housing wall, the housing wall one into several Split casing with inlets and outlets for one Has heat transfer medium. Statischer Mischer nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass benachbarte Gitterebenen eines Gitters gegeneinander versetzt angeordnet sind und die Anzahl der Gitter vier beträgt.Static mixer according to one of claims 1 to 10, characterized in that that adjacent grid levels of a grid are offset from each other and the number of grids is four. Statischer Mischer nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass benachbarte Gitterebenen eines Gitters miteinander fluchtend angeordnet sind und die Anzahl der Gitter vier beträgt. Static mixer according to one of claims 1 to 10, characterized in that that adjacent grid levels of a grid are aligned with each other and the number of grids is four. Verwendung des statischen Mischers nach einem der Ansprüche 1 bis 12 zur Mischung von hochviskosem Mischgut, insbesondere von Polymerschmelzen oder Polymerlösungen mit Zusatzstoffen, anderen Polymeren, Farbstoffen, Pigmenten oder Stabilisierungsmitteln .Use of the static mixer according to one of claims 1 to 12 for Mixing of highly viscous mixes, especially polymer melts or polymer solutions with additives, other polymers, dyes, Pigments or stabilizers.
EP01101637A 2000-02-08 2001-01-26 Static mixer Expired - Lifetime EP1123730B1 (en)

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US6595679B2 (en) 2003-07-22
EP1123730B1 (en) 2004-11-03
US20010012235A1 (en) 2001-08-09
DE50104336D1 (en) 2004-12-09
ATE281230T1 (en) 2004-11-15
DE10005457A1 (en) 2001-08-09
PT1123730E (en) 2005-03-31
DK1123730T3 (en) 2005-02-14
CA2333839A1 (en) 2001-08-08
EP1123730A3 (en) 2003-05-02
ES2232527T3 (en) 2005-06-01
CA2333839C (en) 2009-10-06
JP2001246234A (en) 2001-09-11

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