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WO2018121970A1 - Mélangeur à fonctionnement continu pour fluides et procédé de fonctionement du mélangeur - Google Patents

Mélangeur à fonctionnement continu pour fluides et procédé de fonctionement du mélangeur Download PDF

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Publication number
WO2018121970A1
WO2018121970A1 PCT/EP2017/081896 EP2017081896W WO2018121970A1 WO 2018121970 A1 WO2018121970 A1 WO 2018121970A1 EP 2017081896 W EP2017081896 W EP 2017081896W WO 2018121970 A1 WO2018121970 A1 WO 2018121970A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid inlet
better
cross
mixing
diaphragm
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
PCT/EP2017/081896
Other languages
German (de)
English (en)
Inventor
Manfred Lorenz Locher
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.)
Hydrodynam Jetmix GmbH
Original Assignee
Hydrodynam Jetmix GmbH
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 Hydrodynam Jetmix GmbH filed Critical Hydrodynam Jetmix GmbH
Publication of WO2018121970A1 publication Critical patent/WO2018121970A1/fr
Anticipated expiration legal-status Critical
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
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • 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
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • 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
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4335—Mixers with a converging-diverging cross-section
    • 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
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4521—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube

Definitions

  • the invention relates to the mixing of at least two fluids, in particular a liquid and a gas, in continuous operation, that is not batchwise.
  • mechanical flow mixer for this purpose, for example mechanical flow mixer are known in which the two fluids along physical guide surfaces are guided so that a good mixing takes place.
  • these guide surfaces are arranged stationary, in dynamic mechanical flow mixers these guide surfaces are movable, in particular rotating, arranged.
  • jet mixers are known in which at least one of the two fluids is injected into the other fluid at a relatively high flow rate, that is, as a jet, or both fluids are combined at a relatively high flow rate.
  • the fluids are usually not parallel to each other, but at an angle to each other.
  • the auxiliary services try to supply the brackish oxygen thereby by supplying it as finely distributed to the water, so in the form of a finely dispersed spray, which is only very limited possible with conventional fire-fighting equipment and fire engines, and hardly solves the described problem.
  • industrial mixers are not available fast enough or in sufficient numbers for such disaster operations, and even if this is the case, the required peripheral equipment is usually lacking. In other words, the supply of different types of energy, the equipment of outdoor sensors and electronics that function under adverse conditions, so that the use of such industrial mixers does not take place in practice.
  • the mixer in which two fluids are introduced via a respective fluid inlet into a mixing space to be passed, the mixing section, and the mixture leaves this mixing space via a mixing outlet, it is operated in such a way that a lower pressure prevails at the first fluid inlet is applied as at the second fluid inlet, and in particular at the first fluid inlet only ambient pressure (1000 hPa) is applied.
  • the mixer is thus operated as a jet mixing nozzle.
  • the fluid at a flow rate of at least 1, 0 m / sec, better of at least 1, 5 m / sec, and / or at a flow rate between 1, 6 and 2.0 m / sec, better fed between 1, 7 and 1, 9 m / sec.
  • the second fluid inlet to which the fluid is supplied at a higher pressure that medium with the higher density is fed, preferably one liquid, in particular water, and at the other, first fluid inlet, preferably a gas such as air.
  • the liquid can be enriched with the gas, in particular the air, and the atmospheric oxygen contained therein.
  • an aperture diameter constriction between 0.5 and 0.99, better between 0.6 and 0.98, better between 0.7 and 0.97, better between 0.83 and 0.96, better between 0.80 and 0.94, better chosen between 0.85 and 0.92.
  • the ratio of the diameter of the free passage through the diaphragm to the diameter of the mixing path away from the diaphragm, in particular upstream of the diaphragm, is defined as diaphragm diameter constriction, and in the case of a circular cross section of the aperture diaphragm, also the mixing segment.
  • the diaphragm area constriction ie the ratio of the area of free passage through the diaphragm to the area of the mixing distance away from the diaphragm, in particular upstream of the diaphragm, is considered, then the diaphragm area constriction becomes between 0.25 and 0.98, better between 0.36 and 0.96, better between 0.49 and 0.94, better between 0.69 and 0.89, better between 0.64 and 0.88, better between 0 , 72 and 0.84.
  • the aperture position is the distance of the bottleneck from the 1.
  • Mixing point, the downstream of the two fluid inlets, in relation to the diameter of the mixing distance away from the aperture preferably chosen so that the aperture position between 2.0 and 7.0, better between 3.5 and 4.7, more preferably between 3.7 and 4.5, better between 3.9 and 4.3, better between 4.0 and 4.2.
  • the diameter used is that value for the orifice diameter constriction or aperture position, which is the diameter of a circular cross-sectional area having the same area as the non-circular cross-sectional area.
  • the operating parameters in particular the pressure applied to the second fluid inlet and / or the pressure difference between the first and second fluid inlet and / or the flow velocity at at least one of the two fluid inlets are controlled and / or the constriction is formed such that cavitation occurs at the constriction.
  • the fluid at the first fluid inlet in particular the gas, such as air, with a higher pressure than ambient pressure, but a lower pressure than the pressure at the second fluid inlet to supply, so the pressure of the first fluid to controlled according to the first fluid inlet.
  • the object is achieved in that in the mixer, a mixing section is formed, ie a mixing chamber, which is bounded by a mixing tube and this is traversed in the direction of passage of the fluids and thereby the mixing occurs, wherein the mixer first and second supply ports for the first and second fluid in its front-end region and downstream of an outlet opening for the mixture, so the mixture having.
  • the mixing section In the interior of the mixer, the mixing section is formed, which comprises the said first and second fluid inlets for the two fluids at the front end of the mixing section and at the downstream rear end a mixing outlet for the mixture.
  • this mixing section has a cross-sectional constriction, the free passage has a smaller area than the rest of the mixing section, regardless of whether the mixing section is consistent or changing in the course of this cross-sectional constriction Cross section has.
  • the cross-sectional constriction of the mixing section preferably takes place through a diaphragm, that is, by reducing the outer circumference of the cross-sectional area.
  • the cross-sectional constriction could also be done in other ways, for example by placing an obstacle inside the cross-sectional area, for example in the center of the cross-sectional area of the mixing section.
  • the distance away from the constriction, in particular the orifice, the smallest, and certainly the largest, free cross section of the mixing section away from this constriction, in particular at the mixing outlet, is greater than the sum of the cross-sectional areas of the first and second fluid inlet.
  • this constriction is arranged downstream of the beginning of the mixing section, in particular a considerable distance in the direction of passage away, so that initially takes place in the section from the beginning of the mixing section to the constriction, in particular the aperture, a first mixing between the two fluids, and by the turbulence occurring at the constriction, in particular the diaphragm, and in particular a cavitation occurring there occurs further mixing.
  • the two fluid inlets are arranged at different longitudinal positions, ie measured in the direction of passage, the longitudinal position of the downstream of the two fluid inlets is the beginning of the mixing section.
  • a gas in particular air
  • a denser medium in particular a liquid such as water
  • both the mixing tube of the mixer and the mixing section ie the mixing chamber, have a rotationally symmetrical cross section.
  • a rotationally symmetrical cross section In this case also has the constriction, in particular the aperture, a rotationally symmetrical cross-section and is arranged centrally in the cross section of the mixing chamber.
  • the feed openings of the mixer for the first and second fluid in the mixing tube are usually only for that fluid which is to be contained in the mixture with a larger mass flow rate, preferably the denser medium such as water, arranged centrally, while the lower component, usually the air is supplied via a usually in the side wall or the end face of the mixing raw res arranged feed opening.
  • the fluid supplied via the first supply opening in particular air
  • the mixing tube is supplied centrically to the mixing space in the form of an annular second fluid inlet for the second fluid, which is formed in a feed element which is preferably also concentrically arranged in the mixing tube.
  • the second fluid in particular water, then flows radially outward past the feed element into the mixing space.
  • This fluid inlet at the free, downstream end of the feed element for the first fluid can be centrically and rotationally symmetrical, in particular annular, and the outflow direction can be directed obliquely radially outwards against the second fluid which flows annularly on the outer circumference.
  • an annular fluid inlet for the first fluid in particular gas or air
  • another portion of the second, denser medium such as water
  • second fluid eg Water
  • first fluid eg air
  • second fluid eg water
  • This annular radial sequence from inside to outside with fluid inlets alternately for first and second fluid may also comprise more radial rings.
  • the effect of the constriction, preferably a diaphragm, within the mixing section is optimized by the ratio of the length from the beginning of the mixing section to the diaphragm to the diameter of the mixing section away from the constriction, preferably the diaphragm, this so-called diaphragm position between 2 , 0 and 7.0, better between 3.5 and 4.7, better between 3.7 and 4.5, better between 3.9 and 4.3, better between 4.0 and 4.2. If the diameter of the mixing section changes away from the orifice, the average diameter of the mixing section away from the position, in particular the aperture, and used for this calculation.
  • the degree of constriction at the constriction, in particular the aperture is of great importance, which is defined as the ratio of the diameter of the free passage through a circular aperture to the diameter of the mixing zone away from the aperture, in particular upstream the iris, this so-called iris narrowing should be between 0.5 and 0.99, better between 0.6 and 0.98, better between 0.7 and 0.97, better between 0.83 and 0.96, better between 0, 8 and 0.94, better between 0.85 and 0.92, especially in combination with the above positioning of the aperture.
  • the longitudinal position of the constriction, in particular the aperture should be changeable in the direction of passage and thus adjustable on the mixing tube, so the constriction or aperture be designed to be movable in the mixing tube at least in the direction of passage.
  • the above-described preferred diaphragm positions and diaphragm constrictions are applied analogously, ie with respect to the diaphragm position of the other constriction or aperture then the distance from the constriction, in particular aperture, which precedes in the direction of flow, is to be selected, instead of the distance from the beginning of the mixing section.
  • the inflow surface of the obstacle which creates the constriction, in particular the diaphragm, can lie at right angles to the flow direction 10 ', but also at an angle between 45 ° and 90 °, preferably between 60 ° and 90 °, preferably between 75 ° and 90 ° ° be inclined to it.
  • the second fluid inlet in particular the liquid inlet
  • the mixing section an annular, in particular concentric to the flow direction lying, annular inlet and has in the flow direction upstream of the second fluid inlet a nozzle-shaped cross-sectional constriction, the flanks in longitudinal section at an angle between 5 ° and 50 °, better between 15 ° and 40 °, better between 20 ° and 35 ° to each other.
  • the first fluid inlet in particular the gas inlet, is surrounded by the annular cross-sectional area of the second fluid inlet and in particular is arranged concentrically within it.
  • the first fluid inlet in particular the gas inlet, is an annular, in particular concentric to the flow direction lying, fluid inlet.
  • Figure 2 a cross section through the mixer of Figure 1 along the
  • Figure 1 shows in longitudinal section the - as the cross sections of Figures 2 and 3 show - rotationally symmetrical about the flow direction 10 'formed mixer 10, which is designed here as a mixing tube with corresponding internals, and in Figure 1 in the lower half On the one hand and the upper half of the picture, on the other hand, partially different designs.
  • this mixing chamber 1 1 is via a first fluid inlet 1, which has a surface F1, preferably air in the mixing space 1 1 introduced, preferably sucked by means of the considerable flow rate through the second fluid inlet 2, which has a surface F2, inflowing second fluids, usually water.
  • the second fluid inlet 2 which is concentrically annular, surrounds the first fluid inlet 1 annularly, as shown in FIG.
  • the first fluid inlet 1 may also be concentrically annular around the flow direction (10 '), as shown in the upper half of FIG. 1, or a central inlet of preferably annular area, as shown in FIG. 1 in the lower half, and Similarly, in Figure 3.
  • the first and second fluid inlet 1, 2 are shown at the same axial position and define the beginning of the mixing section 1 first If these two be arranged offset in the axial direction, the first downstream or second fluid inlet would define the beginning of the mixing section 1 1.
  • Downstream of the orifice 4 can, but need not, be a diameter widening with respect to the diameter D4 of the orifice 4 to a larger diameter D3, which is preferably the same size as the diameter D1 1 upstream of the orifice, but may also be a different diameter.
  • D3 which is preferably the same size as the diameter D1 1 upstream of the orifice, but may also be a different diameter.
  • the end of the mixing section 1 1, so the outlet opening 10.3 for the mixture M, but offset by the length L3 from the end of the aperture 4 downstream, which further promotes mixing.
  • the inflow surface 4 a in which a flowing in the flow direction 10 'fluid or fluid mixture impinges on the diaphragm 4 is preferably to the upstream portion of the inner surface of the wall of the mixing raw res 10 at an angle of attack 5 of at least 90 degrees, better more as 90 degrees.
  • a central feed element 7 is used, which as best seen in Figure 2 - by means of three distributed over the circumference, radially extending support arms 8 centrally in the interior of the mixing raw res 10 is held.
  • the air can flow out of this feed element 7 from the downstream end face in the form of the first fluid inlet 1, it is fed to this feed element 7 via channels 9 running radially inside the support arms 8, or at least such a channel, if its cross-section is sufficient for this purpose.
  • the first supply opening 10.1 for the gas, in particular air, into the mixer 10, is arranged either in the downstream end face of the mixing raw res 10, as shown in Figure 1 top right, or radially outside in Scope of mixing raw res at the location of one of the support arms 8 as shown in Figure 1, bottom right.
  • the second supply port 10.2 for the water is the upstream, frontal, central opening of the mixing raw res 10, so that the supplied water W is substantially already supplied in the flow direction 10 ', and only the three support arms 8 must flow around in this case , which should therefore be as narrow as possible in the flow direction of course.
  • the water is usually at an overpressure of several bar, usually about 10 bar, so that at the second fluid inlet 2 an inflow velocity of the water of 1, 5 m / s to 2 m / s is achieved which is sufficient to suck the only under ambient pressure, that is about 1000 hPa, standing gas in the mixing section 1 1 by means of the water flow, whereby a jet mixing nozzle is formed.
  • the water W then enters via the annular second fluid inlet 2 between the radially inner feed element 7 and the outer wall of the mixing raw res 10 in the mixing section 1 1, wherein the outer surface of the feed element 7 as the first flank and the inside of the outer wall of the mixing roh res 3 as the second edge (2b) of the second fluid inlet 2 occupy a flank angle 6 to each other.
  • the first fluid inlet 1 is also annular concentric around the flow direction 10 'is formed, the inflow direction 1', with which the air flows through this first fluid inlet 1, preferably at an acute angle to the inside the wall of the mixed raw res 10 directed.

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

Abstract

L'invention concerne une buse de projection destinée à l'incorporation d'un gaz (G), de préférence de l'air, dans de l'eau (W) ; sont déterminés, d'une part, l'emplacement d'un obturateur (4) dans la direction longitudinale et, d'autre part, l'ampleur de la réduction de la section transversale par l'obturateur (4) - notamment pour un diamètre déterminé de l'alimentation en eau (10.2). Le jet d'eau, provoquant l'effet d'aspiration, est injecté dans la section de mélange (11) sous la forme d'une deuxième entrée de fluide (2) annulaire autour du gaz (1), généralement de l'air, alimenté au centre.
PCT/EP2017/081896 2016-12-30 2017-12-07 Mélangeur à fonctionnement continu pour fluides et procédé de fonctionement du mélangeur Ceased WO2018121970A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016125940.3A DE102016125940B4 (de) 2016-12-30 2016-12-30 Mischer zum kontinuierlichen Mischen einer Flüssigkeit und eines Gases sowie Verfahren zum Betreiben des Mischers
DE102016125940.3 2016-12-30

Publications (1)

Publication Number Publication Date
WO2018121970A1 true WO2018121970A1 (fr) 2018-07-05

Family

ID=60629703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/081896 Ceased WO2018121970A1 (fr) 2016-12-30 2017-12-07 Mélangeur à fonctionnement continu pour fluides et procédé de fonctionement du mélangeur

Country Status (2)

Country Link
DE (1) DE102016125940B4 (fr)
WO (1) WO2018121970A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802748A1 (de) * 1977-01-25 1978-07-27 Rhone Poulenc Ind Verfahren und vorrichtung zur reaktion oder zum material- und/oder energieaustausch zwischen fliessfaehigen medien
US4152409A (en) * 1977-02-04 1979-05-01 Dowa Mining Co., Ltd. Method for carrying out air oxidation and for adding fine bubbles to a liquid
DE3043957A1 (de) * 1980-11-21 1982-07-08 Rudolf Prof. Dr.-Ing. 3380 Goslar Jeschar Drallkammer zum erzeugen umlaufender wirbelfaeden
WO1997000831A1 (fr) * 1995-06-22 1997-01-09 Libradon Ab Dispositif servant a melanger de l'air et de l'eau dans un purificateur d'eau
US20040251566A1 (en) * 2003-06-13 2004-12-16 Kozyuk Oleg V. Device and method for generating microbubbles in a liquid using hydrodynamic cavitation
US20080080303A1 (en) * 2006-10-03 2008-04-03 Anemos Company Ltd. Fluid mixer, fluid mixing apparatus, and nozzle member
DE202008002762U1 (de) * 2008-02-27 2008-05-15 Dsi Getränkearmaturen Gmbh Vorrichtung zum Begasen von Flüssigkeiten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186772A (en) 1977-05-31 1980-02-05 Handleman Avrom Ringle Eductor-mixer system
US5139625A (en) 1989-06-26 1992-08-18 Mitsubishi Denki Kabushiki Kaisha Fluid treatment apparatus and method of its shutdown
JP4081543B2 (ja) 2002-04-26 2008-04-30 富士フイルム株式会社 ハロゲン化銀乳剤粒子の形成方法及び装置並びに微粒子の形成方法
US7247244B2 (en) 2004-10-20 2007-07-24 Five Star Technologies, Inc. Water treatment processes and devices utilizing hydrodynamic cavitation
US20110172137A1 (en) 2010-01-13 2011-07-14 Francesc Corominas Method Of Producing A Fabric Softening Composition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2802748A1 (de) * 1977-01-25 1978-07-27 Rhone Poulenc Ind Verfahren und vorrichtung zur reaktion oder zum material- und/oder energieaustausch zwischen fliessfaehigen medien
US4152409A (en) * 1977-02-04 1979-05-01 Dowa Mining Co., Ltd. Method for carrying out air oxidation and for adding fine bubbles to a liquid
DE3043957A1 (de) * 1980-11-21 1982-07-08 Rudolf Prof. Dr.-Ing. 3380 Goslar Jeschar Drallkammer zum erzeugen umlaufender wirbelfaeden
WO1997000831A1 (fr) * 1995-06-22 1997-01-09 Libradon Ab Dispositif servant a melanger de l'air et de l'eau dans un purificateur d'eau
US20040251566A1 (en) * 2003-06-13 2004-12-16 Kozyuk Oleg V. Device and method for generating microbubbles in a liquid using hydrodynamic cavitation
US20080080303A1 (en) * 2006-10-03 2008-04-03 Anemos Company Ltd. Fluid mixer, fluid mixing apparatus, and nozzle member
DE202008002762U1 (de) * 2008-02-27 2008-05-15 Dsi Getränkearmaturen Gmbh Vorrichtung zum Begasen von Flüssigkeiten

Also Published As

Publication number Publication date
DE102016125940B4 (de) 2022-02-03
DE102016125940A1 (de) 2018-07-05

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