EP0404107A1 - Dispositif statique de mélange pour fluides - Google Patents

Dispositif statique de mélange pour fluides Download PDF

Info

Publication number
EP0404107A1
EP0404107A1 EP90111665A EP90111665A EP0404107A1 EP 0404107 A1 EP0404107 A1 EP 0404107A1 EP 90111665 A EP90111665 A EP 90111665A EP 90111665 A EP90111665 A EP 90111665A EP 0404107 A1 EP0404107 A1 EP 0404107A1
Authority
EP
European Patent Office
Prior art keywords
mixing device
static mixing
mixing
channels
rows
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.)
Withdrawn
Application number
EP90111665A
Other languages
German (de)
English (en)
Inventor
Alfred Gröbner
Hanspeter Widler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0404107A1 publication Critical patent/EP0404107A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B01F25/432—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

Definitions

  • the invention relates to a static mixing device for fluids, in particular gases and / or liquids, with at least two grid-shaped mixing elements which can be inserted one behind the other in a line.
  • a grating that can be inserted into a line for mixing a fluid flowing through it is known from DE-A-23 40 483.
  • the inclined walls of each channel are not inclined over the entire length of the channel. Rather, the flow in the channel is initially guided parallel to the axis and only then kinks.
  • the formation of such a mixing element for mixing a fluid flowing through leads to a uniform speed distribution across the line cross section, with a low pressure drop.
  • this grating or grating-shaped mixing element is relatively large, so that you have a relatively long mixing distance to Homogenization, ie intensive mixing, is required because the through-channels and the partial flows of the incoming fluid stream generated thereby are initially divided only in the main flow direction and only deflected in the exit direction of the mixing element and mixed in the area behind the grating in the form of a kind of post-mixing effect.
  • the invention aims to provide a static mixing device for fluids of the generic type with improved mixing effect over a short mixing distance while overcoming the difficulties described above.
  • the partial flows at the second mixing element are subdivided again in comparison to the first, so that, overall, the inhomogeneity can be reduced by a factor of about two with two mixing elements arranged one behind the other on an extremely short mixing section.
  • the grating-shaped mixing element not only divides the fluid flow arriving in the main flow direction into partial flows onto the passageways, but it is also deflected in adjacent rows in opposite directions at the same time, so that intensive mixing and homogenization with the aid of the mixing element according to the invention with a much shorter mixing distance.
  • the length of the mixing element is approximately a quarter of the line diameter.
  • the length specification of the mixing element in the static mixing device according to the invention means that the larger the line diameter, the smaller the length of the mixing device.
  • the passage channels are preferably to the main flow direction arranged at an angle of 30 ° to 60 ° or larger. In the case of average fluids to be mixed without special treatment, this angle is approximately 45 °, so that the greatest possible mixing efficiency is achieved with the smallest possible pressure drop. To reduce the pressure drop, the angle can be reduced further and be approximately 30 °, such a configuration being particularly suitable as the fluids to be mixed when mixing gases.
  • angles in a range of 60 ° or greater can be used to increase the shear forces in order to increase the dispersing action.
  • the design of the grid-shaped mixing element in the static mixing device according to the invention is such that the number of passage channels per row is different.
  • the design is preferably such that the number of passage channels of the row or rows lying approximately in the cross-sectional center is greatest.
  • the number of passage channels decreases in rows, starting from the central area to the line wall.
  • the design is preferably such that the number of through channels of the rows adjacent to the row or rows assigned to the central region is the same, so that a symmetrical layout of the respective mixing element with respect to the cross-sectional central axis is obtained.
  • the mixing element in the static mixing device according to the invention is designed in such a way that the number of through channels of two adjacent rows differs by at least two through channels in order to obtain a gradation of the degree of mixing from mixing element to mixing element.
  • the design of the mixing element can also be made in such a way that the same number of passage channels is present per row. This gives a uniform distraction and mixing across the line cross-section.
  • the passageways formed by the grate-shaped mixing element are substantially rhomboidal, i.e. they have a rectangular or square cross section.
  • a simplified manufacture of such a lattice-shaped mixing element for a static mixing device can be achieved.
  • the transverse webs of the mixing element arranged between each two adjacent rows of passage channels are at least partially flowed through by coolant or heating medium, so that the fluids to be mixed can be conditioned directly in the region of the mixing element.
  • Heating is desirable in particular in the application in the field of the petroindustry, for which purpose water can be passed through the crossbars as a heating medium.
  • the transverse webs arranged between two adjacent rows of passage channels can at least partially be designed as steam inlet channels.
  • the steam can be added in a metered manner directly in front of or in the region of the mixing element.
  • the passage channels e.g. by vapor deposition of ceramic or plastic material
  • perforating the walls of the guide surfaces and / or transverse webs it is preferred to roughen the surface of the passage channels (e.g. by vapor deposition of ceramic or plastic material) or by perforating the walls of the guide surfaces and / or transverse webs.
  • the static mixing device according to the invention can preferably also be provided, for example, in a heat exchanger or in a rectification column.
  • the mixing device according to the invention can be used both in the turbulent flow area and in the laminar flow area.
  • the mixing device for example, viewed in the main flow direction, comprises two consecutive mixing elements and is followed by a post-mixing section which can be, for example, two to three times the line diameter.
  • a set consisting of one or more mixing elements can in turn be arranged, so that the inhomogeneity is reduced by a factor of 2 in each case of set of arranged mixing elements and the inhomogeneities in the area of the post-mixing section in turn by a factor of approximately 2 to 4 be dismantled.
  • a mixing element is sufficient to intensify the mixing process again.
  • the mixing element 1 of the static mixing device for fluids has five parallel rows I to III of passage channels 2, with a cross bar 3 being arranged between two adjacent rows I to III.
  • the design is designed symmetrically with respect to the central axis X lying in the line cross-sectional plane. Approximately in the center of the cross-section on both sides of the central axis X is the central row of passages, designated I, which in the example shown has the largest number of passages.
  • the rows II and II respectively adjacent to this middle row I have an equal number of through channels, the number of through channels of the rows II, II being smaller than the number of through channels of the row I.
  • This mixing element 1 is particularly suitable for a turbulent flow, the main flow direction of which is denoted by V ⁇ in FIG. 4.
  • an identical mixing element 1 can follow (although not shown) seen in the main flow direction, but is arranged with respect to its orientation rotated by 90 ° to the mixing element shown in FIG. 1.
  • the inhomogeneity can thus be reduced by a factor of about 2 in the case of the static mixing device with the two mixing elements 1 with the aid of the two mixing elements arranged offset by 90 ° to one another.
  • this first set of two mixing elements 1 can then be followed by a post-mixing section in the line section, which can be, for example, two to three times the line diameter.
  • a set of one or more mixing elements can be provided in accordance with the arrangement described above, so that the inhomogeneity is then reduced by a factor of about 2.
  • the length of the mixing element 1 amounts to approximately a quarter of the line diameter.
  • the mixing element for example shown in FIG. 1, initiates the mixing approximately from the center in the area of the row I, and intensive mixing takes place in this area, while in the further rows lying in the direction of the line wall 4 II and III a less intensive mixing of the fluids takes place. Seen overall, intensive mixing and homogenization across the line cross section is achieved with the help of the mixing element according to the invention.
  • Fig. 1 the deflection directions of the partial flows are indicated schematically with arrows. As shown, the flows in adjacent rows I, II, III are deflected in opposite directions.
  • FIG. 3 shows a perspective view of a section of two adjacent rows I and II of through-channels 2.
  • the passage channels 2 are arranged inclined to the main flow direction V ⁇ (see FIG. 4) at an angle of approximately 45 °.
  • the passages can be arranged at an angle of 30 ° to 60 ° or greater, which depends on the particular application.
  • the angle of the passage channels 2 to the main flow direction V ⁇ should be arranged at an angle of 60 ° or greater in order to increase the shear forces.
  • the angle of the passages 2 to the main flow direction V ⁇ can be, for example, 30 °.
  • the post-mixing section can then be extended accordingly, in which the mixing process is continued without a noticeable drop in pressure.
  • a first mixing element is designated by A in FIG. 2a.
  • This mixing element A comprises four rows of through-channels, the two rows IV and IV lying in the middle each having an equal number of through-channels.
  • the rows V and V adjoining this in the direction of the line wall 4 likewise have an equal number of through-channels, the number being reduced to half the number of rows IV.
  • a mixing element B is shown, which comprises three parallel rows of passages VI, each having an equal number of passages.
  • FIG. 2c shows an arrangement in which the mixing elements A and B according to FIGS. 2a and 2b are arranged one behind the other as seen in the main flow direction.
  • the mixing element A according to FIG. 2a is shown in a solid line and behind it in a broken line the mixing element B according to FIG. 2b is shown.
  • the two mixing elements A and B are arranged rotated by 90 ° with respect to one another, so that the number of partial flows generated at mixing element A is increased again in the area of mixing element B.
  • the mixing elements A and B are arranged one behind the other, the greatest possible mixing efficiency is obtained with the smallest possible pressure drop, whereby the fluids to be mixed are distributed over the line cross-section.
  • FIG. 5 shows a further embodiment variant of a mixing element 1 ', which is arranged in a line cross section.
  • the pipe wall is designated 4 '.
  • the mixing element 1 comprises five parallel rows VII to IX of passage channels 2', the rows VII to IX each having a different number of passage channels 2 '.
  • the design of this mixing element 1 ' is also made axially symmetrical to the central axis designated X.
  • the middle row VII is on both sides of the central axis X.
  • the rows VIII and VIII adjoining this in the direction of the line wall 4 ' have an equal number of through-channels 2', but at least two through-channels 2 'smaller than the number of through-channels 2'.
  • the middle row is VII.
  • the rows IX, IX also include an equal number of through-channels 2 ', the number of which, however, is again reduced by two through-channels in comparison to the rows VIII, VIII.
  • FIG. 6 finally, a further embodiment of a mixing element 2 'is shown, which is designed similar to the mixing element A in Fig. 2a.
  • the same or similar parts in Fig. 2a and the embodiment of Fig. 1 are denoted by the same reference numerals, but with an addition ' ⁇ '.
  • This mixing element 1 ⁇ comprises four rows IV to V, the number of passages of the two rows IV and IV adjacent in the central region being the same and also the number of passages of the rows V and V being the same size.
  • the number of passages in rows V and V is half the number of passages in rows IV and IV.
  • the respective passage channels 2, 2 ', 2 ⁇ formed substantially rhomboidal, that is, they have a rectangular or square cross section.
  • This rhomboidal configuration of the passage channels 2, 2 ', 2 ⁇ is realized in all of the previously described embodiments of the mixing elements.
  • the mixing device according to the invention with the mixing elements explained above can be arranged in a heat exchanger or a rectification column.
  • the static mixing device according to the invention is also suitable for other fields of application in which the most intensive possible mixing and homogenization of fluids to be mixed, such as gases and / or liquids, is to be achieved over the shortest possible mixing section.
  • the transverse webs 3, 3 ', 3' arranged between two adjacent rows I to IX of through-channels can be at least partially flowed through by coolant or heating medium.
  • these crosspieces 3, 3 ', 3 ⁇ can also be designed as steam inlet channels, with these measures achieving a conditioning of the fluids or liquids to be mixed precisely in the area of the mixing element.
  • Water heating is particularly desirable in the petroindustry and, for example, in the sterilization of milk, heating by means of a heating medium may be desirable.
  • This form of training allows the medium used for conditioning to be metered in directly in front of the mixing element, so that the production and the respective treatment can be made inexpensively and more effectively.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
EP90111665A 1989-06-20 1990-06-20 Dispositif statique de mélange pour fluides Withdrawn EP0404107A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920123A DE3920123C1 (fr) 1989-06-20 1989-06-20
DE3920123 1989-06-20

Publications (1)

Publication Number Publication Date
EP0404107A1 true EP0404107A1 (fr) 1990-12-27

Family

ID=6383129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90111665A Withdrawn EP0404107A1 (fr) 1989-06-20 1990-06-20 Dispositif statique de mélange pour fluides

Country Status (2)

Country Link
EP (1) EP0404107A1 (fr)
DE (1) DE3920123C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9162206B2 (en) 2013-12-05 2015-10-20 Exxonmobil Research And Engineering Company Reactor bed component for securing rigid assemblies

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123161A1 (de) * 1991-07-12 1993-01-14 Siemens Ag Statischer mischer
DE10158651B4 (de) * 2001-11-30 2016-02-04 Ritter Gmbh Statisches Mischelement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584827A (en) * 1947-03-07 1952-02-05 Plax Corp Crossover homogenizing apparatus
DE2412454B1 (de) * 1974-03-11 1975-07-03 Sulzer Ag Statische Mischeinrichtung
EP0070921A1 (fr) * 1981-07-30 1983-02-09 GebràœDer Sulzer Aktiengesellschaft Elément incorporé pour un dispositif d'échange de matières et d'échange direct de chaleur et pour un dispositif mélangeur
JPS6125628A (ja) * 1984-07-13 1986-02-04 Ngk Insulators Ltd 流体分散装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1442329A (en) * 1972-08-11 1976-07-14 Svenska Rotor Maskiner Ab Grating structures for homogenising fluids
CH653909A5 (de) * 1981-07-30 1986-01-31 Sulzer Ag Kolonne fuer stoff- und/oder waermeaustauschverfahren.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584827A (en) * 1947-03-07 1952-02-05 Plax Corp Crossover homogenizing apparatus
DE2412454B1 (de) * 1974-03-11 1975-07-03 Sulzer Ag Statische Mischeinrichtung
EP0070921A1 (fr) * 1981-07-30 1983-02-09 GebràœDer Sulzer Aktiengesellschaft Elément incorporé pour un dispositif d'échange de matières et d'échange direct de chaleur et pour un dispositif mélangeur
JPS6125628A (ja) * 1984-07-13 1986-02-04 Ngk Insulators Ltd 流体分散装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 178 (C-355)[2234], 21. Juni 1986; & JP-A-61 25 628 (NGH INSULATORS LTD) 04-02-1986 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9162206B2 (en) 2013-12-05 2015-10-20 Exxonmobil Research And Engineering Company Reactor bed component for securing rigid assemblies

Also Published As

Publication number Publication date
DE3920123C1 (fr) 1990-12-20

Similar Documents

Publication Publication Date Title
EP1967806B1 (fr) Dispositif destiné au traitement par échange thermique et mélange de fluides
DE4416343C2 (de) Statischer Mikro-Vermischer
EP1426099B1 (fr) Mélangeur statique et procédé
EP1242171B1 (fr) Micromelangeur
EP0526393B1 (fr) dispositif d'immixtion
EP0947239B1 (fr) Mélangeur statique
EP1674150B1 (fr) Micromélangeur statique
EP1674152B1 (fr) Micromélangeur statique
DE2839564A1 (de) Vorrichtung zur waermetauschenden und mischenden behandlung von stroemenden medien
EP0879083A1 (fr) Dispositif de melange de petites quantites de liquides
DE2052664A1 (de) Vorrichtung zum Mischen, Homogemsieren oder Teilen viskoser Flüssigkeiten
EP0526392A1 (fr) Immixtion de petites quantités de fluides
DE10019759A1 (de) Statisches Mischsystem
DE2129727B2 (de) Vorrichtung zum Entfernen von flüchtigen Bestandteilen aus einem fließfähigen Material
DE2508867B2 (de) Vorrichtung zum Wärme- oder Stoffaustausch, die aus mehreren durch parallele Platten gebildete Austauschräumen besteht
EP0404107A1 (fr) Dispositif statique de mélange pour fluides
EP0759806B1 (fr) Dispositif pour le melange de deux fluides
WO1999001209A1 (fr) Micromelangeur dynamique commutable avec des volumes morts minimums
WO2014127964A1 (fr) Élément de transfert thermique
EP0153974A1 (fr) Distributeur de mélanges gaz-liquides consistant en un moyen de dispersion se composant d'un ou de plusieurs gaz avec la phase dispersée qui y est distribuée et formée d'un ou de plusieurs liquides
DE60307012T2 (de) Abgasreinigungskatalysatoreinheit und dessen Anordnung
EP3966513A1 (fr) Échangeur de chaleur à faisceau tubulaire comportant des modules/éléments intégrés constitués de surfaces déflectrices et de barrettes de guidage
EP3822569B1 (fr) Echangeur de chaleur
EP3338882A1 (fr) Élément mélangeur à résistance et à action de mélange élevés
DE4433439A1 (de) Verfahren zur Durchführung chemischer Reaktionen mittels Mikrostruktur-Mischung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910628