WO1993004771A1 - Melangeur statique - Google Patents

Melangeur statique Download PDF

Info

Publication number
WO1993004771A1
WO1993004771A1 PCT/EP1992/001955 EP9201955W WO9304771A1 WO 1993004771 A1 WO1993004771 A1 WO 1993004771A1 EP 9201955 W EP9201955 W EP 9201955W WO 9304771 A1 WO9304771 A1 WO 9304771A1
Authority
WO
WIPO (PCT)
Prior art keywords
parts
built
static mixer
housing
another
Prior art date
Application number
PCT/EP1992/001955
Other languages
German (de)
English (en)
Inventor
Siegfried Riess
Holger Grossmann
Original Assignee
Otto Tuchenhagen Gmbh & Co.Kg.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Otto Tuchenhagen Gmbh & Co.Kg. filed Critical Otto Tuchenhagen Gmbh & Co.Kg.
Publication of WO1993004771A1 publication Critical patent/WO1993004771A1/fr
Priority to DE4321873A priority Critical patent/DE4321873A1/de

Links

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
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • B01F25/43151—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material composed of consecutive sections of deformed flat pieces of material
    • 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
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material

Definitions

  • the invention relates to a static mixer for mixing flowable substances within a tubular housing, with at least two built-in parts in the housing, each of which is in one piece and band-shaped and has a lamellar shape of relatively small thickness and consists of a number A is formed by active elements, wherein the nutritional components are intertwined or intermeshed with one another.
  • a related static mixer which is designed as a double helix mixer and in which the double helix is formed from two interconnected strips of material, the strips of material each having guiding surfaces in the form of isosceles trapezoids, which - alternately and mirror-symmetrically offset around a main axis and connected to each other at their bevels - form folded edges.
  • the longer of the two parallel trapezoidal sides, which is arranged opposite the shorter one - called the base - is each supplemented by an ellipse segment.
  • the guiding surfaces of the mixing device are formed from the trapezoidal surfaces and ellipse segments each lying in one plane.
  • the guide surfaces guide the fluid flows in directions inclined to the housing axis and changing after short intervals, and the shear forces generated thereby break the disperse phase into small bubbles if the known static mixer is used, for example, for in-line gassing of liquids.
  • the phase interface is continuously renewed by the bubbles coming together and forming new ones. Increased turbulence in the liquid promotes the mass transfer.
  • the shape of the internals in the known double-helix mixer results in a relatively large specific mixer surface in relation to the mixer volume, the two material strips having line contact with each other at each folded edge.
  • the two strips form tapered spaces on these edges, which makes it difficult to clean them properly, particularly in these critical areas, particularly within systems of the food and beverage industry. Since the delimiting curves of the ellipse segments rest on the inner wall of the tubular housing, further cleaning-critical line contacts result here.
  • the above-described design of the guide surfaces of the double helix and their arrangement within the bordering tubular housing form hollow-body-like, partially open mixing spaces, which promote the formation of a relatively high pressure loss when flowing through the static mixer.
  • the present invention has for its object to provide a static mixer of the type identified in the introduction, which compared with static mixers according to the prior art with regard to the intensity of the thorough mixing of the continuous phase with the phase to be dispersed and the achievable mass transfer withstands the technology, but has a lower pressure drop and a simpler and therefore more cost-effective and easy-to-clean design.
  • the advantages of the proposed static mixer are, in particular, that the internals do not form any channels which have an adverse effect on the pressure drop, the circumferential contour of which is more or less self-contained, but that only active elements in the form of lamella surfaces are provided onto which the fluid flows partially collide and at which they are deflected.
  • the effect of the relatively simple built-in parts corresponds incredibly to that of the known mixing elements without, however, having to accept the disadvantages mentioned above.
  • a known static mixer for example the Sulzer mixer, described in vt "procedural technology" 17 (1983) No. 12, pages 698 to 707
  • Enrichment of the water with oxygen approximately 7 mg 02 / liter
  • has a pressure loss about twice as high as the proposed static mixer (1.3 versus 0.7 bar).
  • the static mixer according to the invention has the following flow properties:
  • the proposed static mixer is not only suitable for mixing fluid flows with one another, but in the most general case it can also be used to mix a continuous phase, a liquid or gaseous carrier fluid, with a disperse phase, which can be liquid, gaseous or solid.
  • the low pressure drop is essentially composed of two parts.
  • the smaller proportion results from the fact that only the cross-sections of the active elements corresponding to the number of built-in parts are effective in a pipe cross-section, with a preferred embodiment of the static mixer according to the invention due to the very small lamella thicknesses sl and s2 and on- Because of the lamella widths b1 and b2, which are relatively small compared to the inner diameter of the tube D, there is an active element cross section which is approximately negligible in relation to the tube cross section.
  • the greater part of the pressure loss is caused by the impact of the fluids on the fins and the subsequent deflection.
  • the overall significantly lower pressure loss compared to the known static mixer under comparable conditions results from the.
  • the fact that the proposed static mixer dispenses with a pressure loss-increasing division of the pipe flow into a large number of partial flows, each of which is bordered by a more or less self-contained channel.
  • a further advantageous embodiment of the static mixer according to the invention provides for the active elements of a built-in part to be designed to be flat and with an essentially uniform slat thickness and essentially each uniform width, with every second active element of a built-in part having the same inclination angle with the housing axis forms.
  • the active elements expediently extend from one to the opposite housing wall in accordance with their chosen width. Distances between the built-in part and the adjacent housing walls are possible in principle; however, when viewed in the tube-axial direction, they increase the cross-sectional areas free of internals and generally reduce the intensity of the mixing.
  • the zigzag-shaped course of the built-in parts given by the aforementioned configuration is very easy to manufacture.
  • the Au ⁇ arrangement is simplified even further when the operative elements, as according to the invention provides for a different Au ⁇ ge ⁇ taltung of the static mixer, ⁇ ind magnitude supply angle inclined by the same inclination 'against the Genzouseach ⁇ e.
  • the internals then have a congruent shape when viewed in their plane of extension.
  • the housing axis of the static See mixer for example, degassing phenomena due to gas bubble buoyancy occur when gassing liquids.
  • the effects of this buoyancy are effectively countered by a further configuration of the static mixer, in which the built-in parts are arranged in the housing section in such a way that the vertical, the direction given by the gravitational field, halves the arrangement angle ⁇ .
  • the built-in parts can be arranged in a cylindrical tube, in a tube whose peripheral contour consists of a series of different radii of curvature, or in a tube with a regular or irregular polygonal cross-section.
  • the active elements which are designed as flat surface elements and extend alternately between opposite tube walls, are inclined by the same angle ⁇ relative to the tube axis. This design results in built-in parts that are completely congruent with regard to each dimension.
  • the pressure loss in the static mixer increases quadratically with the width b, but only linearly with the length L of the built-in parts.
  • the enrichment of the continuous phase with the gas phase to be dispersed increases in proportion to the width of the built-in parts with the same installation length, but with a degressive course.
  • the design of the proposed static mixer is therefore an optimization task in each individual case. As a rule, the design of the static mixer with the maximum width bmax of the built-in parts is dispensed with and a longer length L of the built-in parts is accepted.
  • the built-in parts can expediently be produced by shaping, such as bending, folding, folding, forging, drop forging, stamping or deep-drawing, or by master forms, such as casting, investment casting or die casting.
  • shaping such as bending, folding, folding, forging, drop forging, stamping or deep-drawing
  • master forms such as casting, investment casting or die casting.
  • bending should be considered first, which is preferable for solid materials that allow a permanent (plastic) change in shape.
  • thermoplastic plastic strips can also be mentioned, for example.
  • the built-in parts made of shapeless materials such. B. liquid metals or thermosetting or thermoplastic plastics masses should be manufactured, so the original molds (casting) can also be used.
  • Formed built-in parts can be interwoven with one another, as is provided, or else a width of the built-in parts with b> bmax is provided, in which they have to penetrate one another. In this case, they are connected to one another in the penetration areas;
  • Such an embodiment is economically possible only through primary shapes, and, in contrast to embodiments with b ⁇ bmax, it has disadvantages in terms of cleaning technology.
  • the built-in parts are made from preformed semifinished product, for example from corrugated or triangular or rectangular shaped sheets, in the course of a further forming process.
  • the surface of the built-in parts is given a fine structure in the form of smooth elevations and depressions, for example by corrugation or knobs, which protrude from the laminar lower layer of the turbulent pipe flow, then this measure can be used the flow around the fins close to the wall with a view to a desirable turbulent cross-exchange and thus the cleaning effect of the cleaning fluid have a positive effect.
  • a further embodiment of the static mixer provides to connect the built-in parts only to one another at the beginning of their pipe-axial extension and to one another at the end and to the housing.
  • the end connection of the built-in parts to the housing is necessary in order to fix the arrangement axially.
  • the relatively ductile built-in parts are compressed in the direction of their pipe-axial extent against their end-side fastening point with the housing. Spread it they come to rest against the inner wall of the enveloping housing, thereby preventing further deformation.
  • Temporary contact of the built-in parts with one another and vibrations of the mixer are avoided by this pressure, and due to the wall friction, the axial force on the mounting of the built-in parts is reduced.
  • the built-in parts are in engagement with one another, with at least three built-in parts being provided, the active elements of which are arranged alternately between a housing wall and one in or in the vicinity of the housing axis Extend support element.
  • each built-in part is in each case arranged in a plane which forms an arrangement angle ⁇ with one another.
  • This embodiment results in a shortening of the active elements, which now only extend between the essentially centrally arranged support element and the housing wall, with the result of an approximately doubling of the active element surfaces in relation to the length of the static mixer. Since the support element delimits each component on the one hand, there is no longer any interweaving of the components.
  • the built-in parts are partially in engagement with one another.
  • these can be arranged around the support element such that two built-in parts each extend in one plane, the two built-in parts assigned to one plane being separated from one another by the support element are.
  • the arrangement shown above results in an static mixer which, in its basic structure, is similar to that of the first embodiment, in which two built-in parts are provided, the active elements of which alternate between opposite housing walls extend. The difference between the two embodiments is that in the second embodiment, approximately twice the active element surface is installed, which was only possible by dividing the active elements by means of the support elements.
  • another embodiment of the static mixer according to the invention provides that a combination of built-in parts that are interwoven with one another or with one another in the housing and essentially parallel to the housing axis are engaged, is provided in a multiple arrangement. It can be a combination of built-in parts with or without a support element.
  • Figure 1 shows a particularly advantageous and extremely simple embodiment of the built-in parts according to the invention in a perspective view
  • FIG. 2 shows a view of the built-in parts according to the detection in the direction of the tube axis, the vertical bisecting the arrangement angle ⁇ ;
  • FIGS. 3, 4 and 5 show the built-in parts according to FIG. 1 in the front, top and side views;
  • FIG. 6 shows a further embodiment and arrangement of the built-in parts according to the invention in the front, top and side views
  • FIG. 9 shows a static mixer with a combination of built-in parts according to the invention in a multiple arrangement within the housing.
  • the built-in parts 1, 2 are intertwined.
  • FIG. 1 shows that the built-in parts 1 and 2 are congruent embodiments. This congruence is given by the same width, the respective angle of inclination of the active elements relative to the tube axis and the same lamella thickness.
  • FIG. 2 shows how the built-in parts 1, 2 are expediently positioned in the tube 5 or 5 * (tube 5 *, for example, formed as a square tube) when the tube axis A of the static mixer is not arranged vertically.
  • the vertical S halves the arrangement angle ⁇ .
  • the planar active elements of both built-in parts 1, 2 guide the fluid streams striking them predominantly in directions which have components in the direction of the vertical S. This counteracts a phase separation due to buoyancy.
  • a horizontal arrangement of one of the two built-in parts 1 or 2 such a compensation would not be provided by this built-in part.
  • the congruent design of the built-in parts 1 and 2 is illustrated in FIGS. 3 to 5. Both from the front and from the top view it can be seen that the built-in parts 1 and 2 are formed from a number of n active elements (in the present case, the active elements 1.1 to 1.7 or 2.1 to 2.7) are formed. The latter are sl as a flat surface with elements of the lamellae thickness or s2 au ⁇ ge counsel, wherein each ⁇ ie 'magnitude by the same Ne Inc ⁇ winkel ß against the pipe ach ⁇ e A are inclined.
  • the congruence of the built-in parts 1 and 2 arises from the fact that the widths bl and b2 are the same in the illustrated embodiment. Furthermore, it can be seen from the side view (FIG.
  • the length of an installation part 1, 2 is denoted by L, which inevitably results from the length 1 of an active element, measured in the direction of the tube axis A, and the number n of the active elements provided.
  • the active elements extend in the form of a band and alternate between opposite pipe walls (inner diameter D) and pipe-axially.
  • this special design results in particularly simple and therefore inexpensive built-in parts 1, 2.
  • the conditions underlying this special configuration (same width b, same slat thickness ⁇ , same inclination angles 1 ⁇ ) can, however, be dropped without further ado.
  • the installation parts 1 and 2 can, as the names in FIGS. 3 to 5 make clear, with different widths b and b2 (also variable within one installation parts), different slat thicknesses ⁇ l and ⁇ 2 and different inclination angles ⁇ l *, ⁇ l * * or ⁇ 2 *, ⁇ 2 ** can be formed.
  • the above-mentioned mathematical relationship results in an obvious manner from the geometry conditions on which the arrangement is based.
  • width b is considerably reduced compared to the maximum possible width bmax, it is also possible, for example, to arrange three built-in parts with the inner diameter D within the tube 5 under the conditions proposed according to the invention.
  • the built-in parts 1, 2 are connected to one another at the beginning B of their pipe-axial extension (FIG. 3, front view) and at the end C (FIG. 4, top view). At the end C there is also a connection to the tube 5.
  • FIGS. 6, 7 and 8 show the static mixer with a central support element 6 and four built-in parts 1 to 4.
  • Each of these built-in parts extends with its assigned active elements 1.1 to ln or 2.1 to 2.n or 3.1 to 3.n or 4.1 to 4.n alternating between an inner wall of the housing 5 and the adjacent outer contour of the support element 6.
  • the built-in parts are not intertwined with one another like those of the embodiment according to FIGS. 1 to 5, but they are in the area of the support element 6 partially engaged with each other.
  • Regarding the Binding of the built-in parts 1 to 4 with one another and with the housing 5 applies analogously to what has already been done in this context in the embodiment according to FIGS. 1 to 5.
  • FIG. 9 shows a static mixer in which a combination of built-in parts 1, 2 in a multiple arrangement (fourfold) is provided.
  • the vertical S bisects the built-in parts 1, 2 ß the An glovesswinke1, ⁇ o that Paral ⁇ leltician between the vertical S of Gesimousequer ⁇ chnitt 'it and the respective vertical S of the combined built-in parts 1, is given. 2
  • the active elements of an installation part are formed with a substantially uniform width.
  • the invention is not intended to be limited solely to this geometric configuration.
  • the invention is also intended to cover those configurations of the built-in parts in which the built-in parts each have a variable width.
  • the change in width can take place continuously or discontinuously, with built-in parts that are interwoven or in engagement with one another can have an opposite change in width.
  • the last-mentioned design makes it possible to produce built-in components that are variable in width from a strip of material of constant width.
  • the exemplary embodiments of the static mixer described above according to the invention fertilizer is restricted to such built-in parts, in which the fold edge of adjacent active elements is oriented at right angles to the direction in which the built-in parts extend within their plane.
  • the invention is also intended to detect folds that deviate from the right angle mentioned above. This is possible without the direction of the extension of the built-in parts being left within their plane if the folding angle which deviates from the right angle changes alternately.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

Un mélangeur statique servant à mélanger les substances coulantes dans un corps tubulaire comprend au moins deux parties incorporées qui se montent dans ledit corps. Chacune de ces parties est constituée d'une seule pièce, ayant la forme d'un ruban, lamellaire, d'épaisseur relativement petite. Chaque partie incorporée comprend un nombre n d'éléments actifs. Les parties incorporées sont entrelacées ou bien en contact l'une avec l'autre. Le but de l'invention est de créer un mélangeur statique qui supporte la comparaison avec les mélangeurs statiques correspondant à l'état de la technique actuelle, en ce qui concerne l'intensité de mélange de la phase continue avec la phase à disperser, ainsi que le transfert de matière pouvant être obtenu, mais qui présente des pertes de pression plus faibles, dont la structure est plus simple, et qui est ainsi plus économique à fabriquer et plus facile à nettoyer. A cet effet, dans un premier mode de réalisation préféré dudit mélangeur statique, les éléments actifs (1.1 à 1.n ou 2.1 à 2.n) s'étendent alternativement entre des parois opposées du corps, chaque partie incorporée (1, 2) s'étend, après montage, dans un plan (I ou II), et les plans dans lesquelles les parties incorporées se situent forment, l'un par rapport à l'autre, un angle (beta). Dans un autre mode de réalisation dudit mélangeur statique, au moins trois parties incorporées (1, 2, 3) sont prévues, les éléments actifs (1.1 à 1.n; 2.1 à 2.n; 3.1 à 3.n) s'étendent alternativement entre une paroi du corps et un élément de support (6) situé dans l'axe (A) du corps ou à proximité dudit axe, chaque partie incorporée (1, 2, 3) s'étend dans un plan séparé (I ou II ou III), après montage, et les plans dans lesquelles les parties incorporées se situent forment, l'un par rapport à l'autre, un angle (beta).
PCT/EP1992/001955 1991-09-03 1992-08-26 Melangeur statique WO1993004771A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4321873A DE4321873A1 (de) 1991-09-03 1993-07-01 Statischer Mischer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4129248A DE4129248A1 (de) 1991-09-03 1991-09-03 Statischer mischer
DEP4129248.0 1991-09-03

Publications (1)

Publication Number Publication Date
WO1993004771A1 true WO1993004771A1 (fr) 1993-03-18

Family

ID=6439750

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001955 WO1993004771A1 (fr) 1991-09-03 1992-08-26 Melangeur statique

Country Status (2)

Country Link
DE (1) DE4129248A1 (fr)
WO (1) WO1993004771A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655275A1 (fr) * 1993-11-26 1995-05-31 Sulzer Chemtech AG Dispositif de mélange statique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765204A (en) * 1986-09-03 1988-08-23 Koch Engineering Company, Inc. Method of manufacturing a motionless mixer
US4936689A (en) * 1988-07-11 1990-06-26 Koflo Corporation Static material mixing apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040256A (en) * 1976-07-14 1977-08-09 The Dow Chemical Company Flume mixer
DD282855A5 (de) * 1989-05-05 1990-09-26 Akad Wissenschaften Ddr Doppelwendelmischer zum statischen mischen fliessfaehiger medien

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765204A (en) * 1986-09-03 1988-08-23 Koch Engineering Company, Inc. Method of manufacturing a motionless mixer
US4936689A (en) * 1988-07-11 1990-06-26 Koflo Corporation Static material mixing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655275A1 (fr) * 1993-11-26 1995-05-31 Sulzer Chemtech AG Dispositif de mélange statique
US5492408A (en) * 1993-11-26 1996-02-20 Sulzer Chemtech Ag Static mixing apparatus

Also Published As

Publication number Publication date
DE4129248A1 (de) 1993-03-04
DE4129248C2 (fr) 1993-06-24

Similar Documents

Publication Publication Date Title
DE2430487C2 (de) "Vorrichtung zum Mischen von gasförmigen und/oder flüssigen Medien in einem Rohr"
EP1216747B1 (fr) Mélangeur statique
EP0619133B1 (fr) Chambre de mélanges
DE4314507C1 (de) Injektor für Flotationseinrichtungen
EP0947239B1 (fr) Mélangeur statique
EP0800857B1 (fr) Tuyau mélangeur pour fluides à faible viscosité
DE2723056A1 (de) Rohrmischer
DE60110602T2 (de) Statisches mischelement und verfahren zum mischen zweier fluide
DE3012112C2 (fr)
DE3018978A1 (de) Wirbelbildner
DE2810648C2 (fr)
WO1993004771A1 (fr) Melangeur statique
DE4321873A1 (de) Statischer Mischer
DE3229486C2 (de) Statischer Rohrmischer
EP3081285B1 (fr) Dispositif de mélange statique pour des matières pouvant s'écouler
AT396178B (de) Fuellkoerper fuer anlagen zum energie- und/oder stoffaustausch zwischen gas- und/oder fluessigen medien oder tropfenabscheider
DE3021606C2 (fr)
DE2325091A1 (de) Schiebergehaeusekonstruktion
EP1586375A1 (fr) Elément de remplissage
DE2642105A1 (de) Statischer mischer
EP0770845A2 (fr) Tube d'échangeur de chaleur avec éléments turbulateurs générateurs de tourbillons
DE4407275B4 (de) Vorrichtung zum Verteilen eines strömenden Flüssigkeits-Gas-Gemisches in mehrere Teilströme
DE3321456A1 (de) Durchwirbeleinrichtung fuer einen ein rohrbuendel aufweisenden waermetauscher und waermetauscher mit solchen durchwirbeleinrichtungen
DE2416628C3 (de) Mischvorrichtung
DE19717768C2 (de) Einrichtung zum Trennen von heterogenen Dispersionen

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE

122 Ep: pct application non-entry in european phase