EP2603312A1 - Procédé et dispositif pour mélanger deux fluides et utilisation correspondante - Google Patents

Procédé et dispositif pour mélanger deux fluides et utilisation correspondante

Info

Publication number
EP2603312A1
EP2603312A1 EP11761485.9A EP11761485A EP2603312A1 EP 2603312 A1 EP2603312 A1 EP 2603312A1 EP 11761485 A EP11761485 A EP 11761485A EP 2603312 A1 EP2603312 A1 EP 2603312A1
Authority
EP
European Patent Office
Prior art keywords
fluid
flow
flow channel
mixing
pulsating
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.)
Ceased
Application number
EP11761485.9A
Other languages
German (de)
English (en)
Inventor
Christian Paschereit
Arnaud Lacarelle
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.)
Technische Universitaet Berlin
Original Assignee
Technische Universitaet Berlin
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 Technische Universitaet Berlin filed Critical Technische Universitaet Berlin
Publication of EP2603312A1 publication Critical patent/EP2603312A1/fr
Ceased legal-status Critical Current

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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B01F25/31331—Perforated, multi-opening, with a plurality of holes
    • 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
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31424—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations aligned in a row perpendicular to the flow direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/30—Micromixers
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71755—Feed mechanisms characterised by the means for feeding the components to the mixer using means for feeding components in a pulsating or intermittent manner

Definitions

  • the invention relates to technologies in the field of mixing fluids, in particular a method and a mixing device for mixing two fluids and their use.
  • the object of the invention is to provide new technologies for the mixing of fluids, which improve the mixing process qualitatively and in terms of its variability for different applications.
  • the invention includes the idea of a method for mixing two fluids, the method comprising the following steps:
  • a mixing apparatus for mixing two fluids comprising:
  • a flow channel configured for a flow of a fluid
  • a passive microfluidic actuator device formed with a cavity structure, wherein the passive microfluidic actuator device is configured to self-induce by pulsing another fluid through the cavity structure to induce a pulsatile / oscillating injection current of the further fluid at a pulsation / oscillation frequency;
  • An injection device which is coupled to the output of the passive microfluidic actuator means and the flow channel and is configured for mixing the fluid and the further fluid to introduce the pulsating / oscillating injection current of the further fluid in the flow of fluid transverse to the flow direction of the fluid in the flow channel ,
  • the method and / or the mixing device can be used in various devices, in particular a gas combustion engine, a burner of a gas combustion engine, a T-mixer of the chemical industry or a chemical tubular reactor.
  • the process can be used in conjunction with liquids or gases.
  • use in conjunction with so-called NACA profiles can be provided.
  • NACA profiles are two-dimensional sections of aircraft wing airfoils developed by the National Advisory Committee for Aeronautics for wing design.
  • a passive microfluidic actuator device is used to self-inducing to provide a pulsating or oscillating injection flow of a fluid, which is then introduced as a pulsating / oscillating fluid flow in another fluid, which is transverse to the flow direction of the other fluid in a flow channel.
  • the microfluidic actuator device is passive in particular in the sense that a movement of elements of the actuator device for generating the pulsating / oscillating injection current is not provided. Rather, the formation of the pulsating / oscillating injection current is self-inducing in a cavity structure of the actuator device, which is flowed through by the admixed fluid.
  • the pulsation / oscillation of the injection current then takes place with a characteristic frequency. In this way, efficient mixing of the fluid from the injection stream into the other fluid flowing in the flow channel is achieved.
  • a Individual adaptation of the mixing process for different application situations is possible in particular in that the passive microfluidic actuator device is provided with a cavity structure suitable for the respective application, whereby the generation and provision of the pulsating / oscillating injection current is adapted to the desired application parameters.
  • the pulsation / oscillation frequency of the pulsating / oscillating injection stream of the further fluid corresponds to a characteristic frequency of the passive microfluidic actuator device.
  • These include in particular so-called acoustic resonance frequencies, which are usually independent of the mass flow through the actuator device. Furthermore, this includes frequencies that arise due to a fluid mechanical feedback, which can also be referred to as fluid mechanical frequencies.
  • the frequency at the outlet of the actuator device is then often dependent on the mass flow through the actuator device. There is then no constancy.
  • a preferred embodiment of the invention provides that the fluid in the flow channel flows around a flow channel element, on which the injection device is formed.
  • the flow channel element is provided with a fluidically optimized surface contour.
  • the additional fluid is introduced into the flow of the fluid via an arrangement of a plurality of outlet openings of the injection device, wherein the arrangement of the plurality of outlet openings extends substantially transversely to the flow direction of the fluid in the flow channel.
  • the plurality of outlet openings can be distributed in one embodiment over the entire channel width of the flow channel.
  • An advantageous embodiment of the invention provides that generates the pulsating / oscillating injection current with a high Pulsations- / Oszillationsfrequenz and is introduced into the flow of the fluid, wherein the pulsation / oscillation frequency in air is at least about 100 Hz, preferably at least about 250 Hz.
  • the frequency is fluid-dependent.
  • a development of the invention in this context provides that in the flow channel, a flow channel element is arranged, which is flowed around by the fluid and on which the injection device is formed.
  • the angle of the fluidic injection may have any angle relative to the fluid flowing around.
  • the cavity structure of the passive microfluidic actuator device is at least partially formed in the flow channel element.
  • the passive microfluidic actuator device is designed to passively self-regulate the pulsation / oscillation frequency of the pulsating / oscillating injection current as a function of the flow rate of the further fluid through the passive microfluidic actuator device.
  • the passive microfluidic actuator device is configured with its cavity structure such that, depending on the flow rate of the further fluid, different pulsation / oscillation frequencies can be set which correspond to a characteristic frequency of the passive microfluidic actuator device.
  • a preferred development of the invention provides that the injection device is formed with an arrangement of a plurality of outlet openings, wherein the arrangement of the plurality of outlet openings extends substantially transversely to the flow direction of the fluid in the flow channel.
  • FIG. 1 is a schematic representation of a mixing device for mixing fluids
  • Fig. 2 is a schematic representation of a portion of the mixing device of Fig. 1 in cross section
  • FIG. 3 shows a schematic representation of a passive microfluidic actuator device for generating a self-induced oscillating injection current
  • FIG. 4 shows a schematic representation of a passive microfluidic actuator device for generating a self-induced pulsating injection current
  • FIG. 6 shows a schematic representation of a mixing device for mixing fluids, in which a plurality of injection openings are arranged transversely to the flow channel, and
  • Fig. 7 is a schematic representation of a NACA profile.
  • FIG. 1 shows a schematic representation of a mixing device for mixing fluids, in which a first fluid flows along a flow channel 1 along a direction indicated by the arrow I.
  • a flow channel element 2 Arranged in the flow channel 1 is a flow channel element 2, on which a plurality of injection openings 3 of an injection device are formed, through which a second fluid is introduced transversely to the flow direction of the first fluid (see arrow II) as part of a mixing process.
  • FIG. 2 shows a schematic representation of a section of the mixing device from FIG. 1 along the line AA 'in FIG. 1. It emerges that the injection openings 3 are formed substantially evenly distributed along the circumference of the flow channel element 2, whereby substantially on all sides an application and mixing of the second fluid takes place transversely to the flow direction of the first fluid.
  • FIG. 3 shows a passive microfluidic actuator device for generating an oscillating injection current generated by it in a self-inducing manner.
  • the fluid to be admixed is via an inlet opening 30 in a cavity structure 31 of the microfluidic Actuator introduced, in which self-inducing an oscillating injection flow of the fluid is produced, which is discharged via a réelleöffhung 32.
  • the oscillation frequency of the output injection current corresponds to a resonance frequency of the cavity structure 31.
  • FIG. 4 shows a schematic representation of a further passive microfluidic actuator device for the self-induced generation of a pulsating injection current.
  • the fluid to be admixed Via an inlet opening 40, the fluid to be admixed is introduced into a cavity structure 41. Via an outlet opening 42, a self-induced pulsating injection current is then emitted.
  • Micro fluidic cavity structures for self-induced generation of pulsating / oscillating flows of a fluid are known as such in various embodiments, be it based on the embodiments shown in FIGS. 3 and 4 or in another form (see, for example, Shakouchi, Jet and Wake Flow Control and their Practical Application, International Conf. On Jets, Wakes and Separated Flows, 2008).
  • FIG. 5 shows a schematic illustration with two so-called T-mixers, in which a first fluid flows along a respective channel flow 1 (into or out of the image plane). Transverse to the flow direction, an oscillating / pulsating injection current is introduced using a passive microfluidic actuator device 50, which is formed correspondingly to the embodiments in FIGS. 3 and 4, for example.
  • 6 shows a schematic representation of a mixing device for mixing fluids with a flow channel 1 and a passive microfluidic actuator device 60, in which a pulsating / oscillating injection stream of another fluid is generated in a self-induced manner, which then flows through an arrangement of several outlets 61 into the stream of the first fluid is injected.
  • Fig. 7 shows a schematic representation of a NACA profile 70, which is used for example in swirl burners. Actuators 71, 72 are installed on the rear profile 70 in order to improve the mixture.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un procédé pour mélanger deux fluides, comprenant les étapes suivantes consistant à : former un flux d'un fluide le long d'un canal d'écoulement (1), créer un flux d'injection pulsé/oscillant d'un autre fluide en faisant passer ce dernier à travers une structure de cavité d'un dispositif actionneur microfluidique passif (2) dont la sortie est couplée au canal d'écoulement (1) par l'intermédiaire d'un dispositif d'injection et qui est configuré de façon à produire, par auto-induction, le flux d'injection pulsé/oscillant avec une fréquence de pulsation/oscillation, et mélanger le fluide et l'autre fluide en introduisant le flux d'injection pulsé/oscillant de l'autre fluide par l'intermédiaire du dispositif d'injection dans le flux du fluide transversalement au sens d'écoulement de ce dernier dans le canal d'écoulement (1). L'invention concerne également un dispositif associé et l'utilisation de ce procédé.
EP11761485.9A 2010-06-22 2011-06-20 Procédé et dispositif pour mélanger deux fluides et utilisation correspondante Ceased EP2603312A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010017523A DE102010017523A1 (de) 2010-06-22 2010-06-22 Verfahren und Mischvorrichtung zum Mischen von zwei Fluiden sowie deren Verwendung
PCT/DE2011/075144 WO2012022324A1 (fr) 2010-06-22 2011-06-20 Procédé et dispositif pour mélanger deux fluides et utilisation correspondante

Publications (1)

Publication Number Publication Date
EP2603312A1 true EP2603312A1 (fr) 2013-06-19

Family

ID=44718973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11761485.9A Ceased EP2603312A1 (fr) 2010-06-22 2011-06-20 Procédé et dispositif pour mélanger deux fluides et utilisation correspondante

Country Status (3)

Country Link
EP (1) EP2603312A1 (fr)
DE (1) DE102010017523A1 (fr)
WO (1) WO2012022324A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3174624A1 (fr) * 2014-07-29 2017-06-07 Voith Paper Patent GmbH Heidenheim Procédé et dispositif destiné au dosage et à l'incorporation d'au moins un milieu fluide dans un flux de traitement
US10792627B2 (en) * 2018-05-08 2020-10-06 Sensia Llc Fluid mixing systems and methods

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748852A (en) * 1969-12-05 1973-07-31 L Cole Self-stabilizing pressure compensated injector
JP3746766B2 (ja) * 2001-02-23 2006-02-15 独立行政法人科学技術振興機構 エマルションの製造方法およびその装置
WO2004098757A2 (fr) * 2003-05-06 2004-11-18 New Jersey Institute Of Technology Melange microfluidique faisant appel a une pulsation de flux
DE102004040735B4 (de) * 2004-08-23 2006-11-23 ETH-Zürich, Institut für Lebensmittelwissenschaft, Laboratorium für Lebensmittelverfahrenstechnik Verfahren zur mechanisch schonenden Erzeugung von fein dispersen Mikro-/Nano-Emulsionen mit enger Tropfengrößenverteilung und Vorrichtung zum Durchführen des Verfahrens
JP5643474B2 (ja) * 2004-10-01 2014-12-17 ヴェロシス，インク． マイクロチャネルプロセス技術を用いる多相混合プロセス
US7128082B1 (en) * 2005-08-10 2006-10-31 General Electric Company Method and system for flow control with fluidic oscillators
DE602006015209D1 (de) * 2005-10-06 2010-08-12 Unilever Nv Mikrofluidnetz und verfahren
AT503908A1 (de) * 2006-06-23 2008-01-15 Reiter Heinz Trinkflüssigkeit
JP5262064B2 (ja) * 2007-10-30 2013-08-14 富士ゼロックス株式会社 マイクロリアクターを用いた反応方法及びマイクロリアクター

Non-Patent Citations (1)

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Title
See references of WO2012022324A1 *

Also Published As

Publication number Publication date
DE102010017523A1 (de) 2011-12-22
WO2012022324A1 (fr) 2012-02-23

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