EP3092065B1 - Vormischer und zugehörige installation - Google Patents

Vormischer und zugehörige installation Download PDF

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Publication number
EP3092065B1
EP3092065B1 EP14828478.9A EP14828478A EP3092065B1 EP 3092065 B1 EP3092065 B1 EP 3092065B1 EP 14828478 A EP14828478 A EP 14828478A EP 3092065 B1 EP3092065 B1 EP 3092065B1
Authority
EP
European Patent Office
Prior art keywords
premixer
fluid
shutter
pipe
inlet
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.)
Active
Application number
EP14828478.9A
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English (en)
French (fr)
Other versions
EP3092065A1 (de
Inventor
Thierry Patrick Gérard DELERUE
Michael Jacques Gérard STEEN
Michel Lebey
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Individual
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Publication date
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Priority to PL14828478T priority Critical patent/PL3092065T3/pl
Publication of EP3092065A1 publication Critical patent/EP3092065A1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/008—Making of fire-extinguishing materials immediately before use for producing other mixtures of different gases or vapours, water and chemicals, e.g. water and wetting agents, water and gases
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • 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
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • 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
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • 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
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • 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
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31251—Throats
    • B01F25/312511—Adjustable Venturi throat

Definitions

  • the present invention relates to a premixer and an installation comprising such a premixer.
  • foam Water is often insufficient to extinguish certain fires.
  • an additive is to be mixed with water to make it penetrating.
  • Hydrocarbon fires or polar solvent require smothering by a foam.
  • This foam is a heterogeneous mixture of air and water additivée, obtained using an emulsifying agent and a foam generator.
  • the suffocation by the foam or additive water is commonly used by firefighters in intervention or preventive planned on fixed installations in case of storage of hazardous products.
  • the production of foam is generally obtained using a pump, a tank containing an emulsifier or an additive, an injection system and dosing of the foam concentrate and a foam generator.
  • a Venturi type system allows the injection of liquid into a pressurized network. This injection is obtained by suction of the liquid to be injected through a decrease in the static pressure. It is an increase in the speed in the network which makes it possible to drop the static pressure.
  • the subject of the invention is a fluid premixer according to claim 1.
  • the premixer is according to any one of claims 2 to 10.
  • a premixer 10 is shown in perspective at figure 1 .
  • the premixer 10 is a fluidic connection that allows fluid flow between two elements. In the case of the present description, is considered a premixer 10 to ensure the connection between elements specific to the fluid flow.
  • a first unit is upstream of a second unit when the fluid is flowing from the first unit to the second unit.
  • a first unit is downstream of a second unit as fluid flows from the second unit to the first unit.
  • the premixer 10 comprises a conduit 12 and a housing 14.
  • the conduit 12 shown in more detail in FIG. figure 2 , comprises a first inlet 16 of a first fluid at a first pressure P1, a second inlet 18 of a second fluid to be mixed with the first fluid, a neck 20, a fluid outlet 22 at a second pressure P2, a shutter 24 duct 12, a closure member 26 of the second inlet 18.
  • the duct 12 extends along an axis X.
  • the duct 12 has a symmetry of revolution about the axis X.
  • the first input 16 is adapted to accommodate a first fluid.
  • the first fluid is pressurized water.
  • the first input 16 is adapted to be connected to a pressurized network.
  • pressurized network it is understood a network in which circulates a fluid under pressure, that is to say a fluid whose pressure is greater than 1 bar.
  • the first input 16 and the output 22 are coaxial.
  • the first input 16 and the output 22 are not coaxial, the conduit 12 having for example a bend.
  • the X axis is defined using the pass 20.
  • the first input 16 is a tip whose cross section in a plane perpendicular to the X axis is substantially constant along the X axis.
  • the outlet 22 is also a tip of substantially constant cross-section along the X axis.
  • the cross sectional area of the first inlet 16 and the cross sectional area of the outlet 22 are equal. This facilitates the adaptation of the premixer 10 to any system.
  • the neck 20 is located between the first inlet 16 and the outlet 22.
  • the neck 20 has a substantially constant cross section along the axis X.
  • the neck 20 is connected to the first inlet 16 by a convergent 30 and the outlet by a divergent 32.
  • the neck 20 forms a constriction between the first input 16 and the output 22.
  • the convergent 30 and the divergent 32 are coaxial, thus defining the axis X along which the duct 12 extends.
  • the cross-sectional area of the neck 20 is smaller than the cross-sectional area of the first inlet 16 and the cross-sectional area of the outlet 22.
  • the cross-sectional area neck 20 is such that it allows a speed of the first fluid to generate the suction of the second fluid by reducing the static pressure.
  • the convergent 30 connects the first inlet 16 to the neck 20.
  • the area of the cross section of the convergent 30 decreases progressively from the first inlet 16 to the neck 20. In the particular case of the figure 2 the decrease is continuous.
  • the divergent 32 connects the neck 20 to the outlet 22.
  • the area of the cross section of the divergent 32 increases progressively from upstream to downstream, that is to say from the neck to the exit 22. In the particular case of the figure 2 , the increase is continuous.
  • the shutter 24 of the duct 12 is movable between several positions each defining a degree of closure distinct from the duct 12.
  • the shutter 24 at least partially closes the neck 20.
  • the shutter 24 defines a passage in the neck 20, whose section has a variable area depending on the position of the shutter 24.
  • the passage is annular.
  • the shutter 24 extends into the neck 20.
  • the shutter 24 is profiled and extends into the divergent 32.
  • the shutter 24 has a front portion tapered upstream and a tapered rear portion downstream.
  • the shutter 24 is an ogive.
  • Such a shape has the advantage of limiting the forces exerted by the first fluid on the warhead and to reduce the pressure drop.
  • a shutter 24 is an ogive if the shutter 24 has a refined front portion of the upstream side and a rear refined part of the downstream side.
  • the shutter 24 is an axisymmetric ogee.
  • the shutter 24 is movable from one position to another by a translation along the axis X.
  • the shutter 24 is movable between all the positions situated between two extremal positions, the first extreme position corresponding to a position in which the shutter 24 completely closes the conduit 12 and a second extremal position corresponding to a position in which the shutter 24 is in the outlet 22 and leaves free the entire section of the neck 20.
  • This makes it possible to vary the area of the passage cross section of the neck 20 as a function of the position of the shutter 24.
  • the second entry 18 is, as figures 2 and 3 , a conduit opening into an O-input supplying the neck 20.
  • the second inlet 18 thus allows the injection of the second fluid.
  • the second fluid is an additive of the first fluid.
  • the second fluid is an emulsifier whose mixture with the first fluid makes it possible to obtain a mixture.
  • the second inlet 18 is adapted to be connected to a reservoir of fluid to be injected into the first fluid.
  • the pipe is provided with a closure member 26 of the second inlet 18.
  • the closure member 26 is movable between several positions each defining a degree of closure distinct from the second inlet 18.
  • the closure member 26 is a piston.
  • the position of the closure member 26 is a function of the position of the shutter 24 of the duct 12.
  • the injection of the second fluid into the first fluid is between 0.1% and 6% of the first fluid.
  • the housing 14 comprises, according to the illustrated embodiment, a control element 34, an indicator 36 of the position of the shutter 24, a control valve 38 and a flushing valve 40.
  • the control element 34 is able to control the position of the shutter 24 as a function of the pressure difference between the first pressure P1 and the second pressure P2.
  • the pressure drop of the premixer 10 is the difference between the first pressure P1 and the second pressure P2.
  • control element 34 is a double-acting piston outside the premixer 10.
  • the surfaces of the piston are proportional to the difference between the first pressure P1 and the second pressure. P2.
  • control element 34 is an electric control element 34.
  • control element 34 is an electric jack.
  • the indicator 36 of the position of the shutter 24 makes it possible to indicate the flow of fluid in the conduit 12.
  • the indicator 36 is a needle positioned on a graduated scale.
  • the position of the needle is related to the position of the shutter 24.
  • the indicator 36 is connected to an electrical indicator.
  • the control valve 38 makes it possible to modify the pressure on the control element 34 so as to position the shutter 24 in the position in which the shutter 24 is in the outlet 22 and leaves the entire section of the neck 20 free.
  • the flushing valve 40 is able to switch between two positions, an operating position of the premixer 10 in which the flush valve 40 does not play a role and a cleaning position of the premixer 10 in which it is possible to rinse the premixer 10 after use.
  • the neck 20 generates an acceleration of the fluid which causes a depression, which depression makes it possible to generate a suction in the second inlet 18 through which the additive is injected.
  • the suction therefore depends on the passage section of the neck 20, itself a function of the position of the shutter 24.
  • the position of the shutter 24 being a function of the flow rate of the first fluid in the conduit 12 of the premixer 10, the amount of additive injected is thus related to the flow rate of the first fluid.
  • the shutter 24 is positioned so as to limit the closing of the neck 20. This makes it possible to avoid losses when it is not desired to produce a mixed.
  • a collar 20 is thus produced whose geometry is variable. This makes it possible to obtain a controllable Venturi effect via the geometry of the neck 20, which geometry is controlled by the position of the shutter 24.
  • premixer 10 is therefore usable over a wide range of flow.
  • the premixer 10 uses a neck 20 providing a Venturi effect, the advantages specific to these systems are retained.
  • the premixer 10 is lightweight, usable over a wide range of flow and has good reliability and a relatively low price.
  • premixer 10 limits the pressure drop. Typically, at most, the pressure drop is limited to 30 or 40%.
  • premixer 10 can be used for any type of system, regardless of the characteristics of the system.
  • the same premixer 10 can be used for systems meeting different standards, making this premixer 10 adaptable in particular to a plurality of geographical territory without modifying the premixer 10.
  • such a premixer 10 can be used in a facility suitable for delivering the fluid mixture.
  • the installation is a fixed or mobile installation.
  • premixer 10 provides a precise dosage of the amount of second fluid injected into the first fluid.
  • the proposed premixer 10 finds application in many fields including agricultural spreading systems, medicine, some industrial injection systems and the field of firefighting.
  • premixer 10 comprises only the conduit 12, the shutter 24 of the conduit 12 and the control element 34.
  • the control element 34 is in the conduit 12 and comprises two pistons 34A and 34B whose cross section is different.
  • the cross section of the first piston 34A is smaller than the cross section of the second piston 34B.
  • the two pistons 34A and 34B are connected to the shutter 24.
  • the first piston 34A is connected to the front part of the shutter 24, that is to say upstream of the shutter 24.
  • the second piston 34B is connected to the rear part of the shutter 24, that is to say downstream of the shutter 24.
  • the entire control element 34 and the shutter 24 forms a single moving block.
  • the first piston 34A is subjected to the first pressure P1 while the second piston 34B is subjected to the second pressure P2.
  • the control element 34 is therefore able to control the position of the shutter 24 as a function of the pressure difference between the first pressure P1 and the second pressure P2.
  • the same operating principle makes it possible to maintain the control valve 38.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Accessories For Mixers (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (11)

  1. Fluid-Vormischer (10) zum Mischen eines ersten Fluid und eines zweiten Fluid durch Ansaugen des zweiten Fluid in das erste Fluid via Venturi-Effekt, wobei der Vormischer (10) eine Leitung (12) aufweist, die aufweist:
    - einen ersten Eingang (16) für erste Fluid mit einem ersten Druck (P1),
    - einen zweiten Eingang (18) für das mit dem ersten Fluid zu mischende zweite Fluid zum Bilden einer Mischung,
    - einen Ausgang (22) für die Mischung mit einem zweiten Druck (P2), und
    - ein Absperrstück (24) der Leitung (12), das zwischen mehreren Positionen bewegbar ist, von denen jede einen unterschiedlichen Absperrgrad für die Leitung (12) definiert, wobei der Vormischer aufweist einen Hals (20), der zwischen dem ersten Eingang (16) und dem Ausgang (22) angeordnet ist, wobei der zweite Eingang (18) eine Leitung ist, die in einen Eingang einmündet, der den Hals (20) speist, dadurch gekennzeichnet, dass der Vormischer ferner aufweist ein Steuerelement (34), das imstande ist, die Position des Absperrstücks in Abhängigkeit von der Differenz zwischen dem ersten Druck (P1) und dem zweiten Druck (P2) zu steuern.
  2. Vormischer gemäß Anspruch 1, wobei die Leitung (12) eine Konvergenz (30) und eine Divergenz (32) hat, die koaxial sind und die auch eine Achse (X) definieren, entlang welcher sich die Leitung (12) erstreckt, wobei sich der zweite Eingang (18) entlang einer Richtung nicht kollinear mit der Achse (X) der Leitung und bevorzugt senkrecht zur Achse (X) erstreckt.
  3. Vormischer gemäß Anspruch 1 oder 2, wobei die Leitung (12) eine Konvergenz (30) und eine Divergenz (32) hat, die koaxial sind und die auch eine Achse (X) definieren, entlang welcher sich die Leitung (12) erstreckt, wobei das Absperrstück (24) bewegbar ist von einer Position aus zu einer anderen Position durch eine Translation entlang der Achse (X), entlang welcher sich die Leitung (12) erstreckt.
  4. Vormischer gemäß irgendeinem der Ansprüche 1 bis 3, wobei das Absperrstück (24) ein Bauteil ist, welches entlang der Flussrichtung des ersten Fluid bewegbar ist.
  5. Vormischer gemäß irgendeinem der Ansprüche 1 bis 4, wobei das Steuerelement (34) aufweist wenigstens einen Kolben, der einen Querschnitt hat, der proportional ist zu der Differenz zwischen dem ersten Druck (P1) und dem zweiten Druck (P2).
  6. Vormischer gemäß irgendeinem der Ansprüche 1 bis 5, aufweisend ein Organ zur Absperrung (26) des zweiten Eingangs (18), das zwischen mehreren Positionen bewegbar ist, von denen jede einen unterschiedlichen Absperrgrad für den zweiten Eingang (18) definiert, wobei die Position des Organs zur Absperrung (26) abhängig ist von der Position des Absperrstücks (24) der Leitung (12).
  7. Vormischer gemäß irgendeinem der Ansprüche 1 bis 6, ferner aufweisend eine Anzeige (36) der Position des Absperrstücks (24) .
  8. Vormischer gemäß irgendeinem der Ansprüche 1 bis 7, wobei das Absperrstück (24) in eine Position für einen minimalen Absperrgrad der Leitung (12) bewegbar ist, wobei der Vormischer (10) mit einem Steuerschieber (38) versehen ist, der es ermöglicht, das Absperrstück (24) in der Position für einen minimalen Absperrgrad der Leitung (12) zu positionieren.
  9. Vormischer gemäß irgendeinem der Ansprüche 1 bis 8, wobei das Steuerelement aufweist zwei Kolben (34A, 34B) mit unterschiedlichem Querschnitt, wobei jeder Kolben (34A, 34B) mit dem Absperrstück (24) verbunden ist.
  10. Vormischer gemäß irgendeinem der Ansprüche 1 bis 9, wobei der zweite Eingang (18) in die Leitung (12) einmündet zwischen dem ersten Eingang (16) und dem Ausgang (22).
  11. Einrichtung, die imstande ist, eine Fluidmischung zuzuführen, aufweisend einen Vormischer (10) gemäß irgendeinem der Ansprüche 1 bis 10.
EP14828478.9A 2014-01-06 2014-12-24 Vormischer und zugehörige installation Active EP3092065B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14828478T PL3092065T3 (pl) 2014-01-06 2014-12-24 Mieszalnik wstępny i powiązana z nim instalacja

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1450054A FR3016132B1 (fr) 2014-01-06 2014-01-06 Premelangeur et installation associee
PCT/EP2014/079292 WO2015101579A1 (fr) 2014-01-06 2014-12-24 Prémélangeur et installation associée

Publications (2)

Publication Number Publication Date
EP3092065A1 EP3092065A1 (de) 2016-11-16
EP3092065B1 true EP3092065B1 (de) 2019-07-10

Family

ID=50473541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14828478.9A Active EP3092065B1 (de) 2014-01-06 2014-12-24 Vormischer und zugehörige installation

Country Status (7)

Country Link
US (1) US10232325B2 (de)
EP (1) EP3092065B1 (de)
CN (1) CN106413869B (de)
ES (1) ES2747921T3 (de)
FR (1) FR3016132B1 (de)
PL (1) PL3092065T3 (de)
WO (1) WO2015101579A1 (de)

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AR082603A1 (es) * 2011-08-09 2012-12-19 Lavaque Oscar Un dispositivo solubilizador de dioxido de carbono en una bebida, de presion variable
US9815557B2 (en) * 2012-09-20 2017-11-14 Humbay Health, LLC Aircraft humidifier
CN106807297A (zh) * 2017-03-20 2017-06-09 中国石油大学(华东) 一种用于水下混输泵入口前的气液均混装置
CN110448829A (zh) * 2018-05-07 2019-11-15 中国石油化工股份有限公司 负压式三相泡沫发生装置及方法和应用
CN111450719B (zh) * 2020-04-13 2021-03-02 四川大学 一种复合文丘里式微气泡发生装置

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US1372740A (en) * 1917-06-13 1921-03-29 Lynn A Williams Carbureter
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DE1751733A1 (de) * 1968-07-19 1971-04-29 Porsche Kg Elektronisch gesteuerter Vergaser
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DE4215286A1 (de) * 1992-05-09 1993-11-11 Hermann Dr Ing Golle Einrichtung zur Gemischbildung von flüssigen und gasförmigen Medien
FR2733696B3 (fr) * 1995-05-04 1997-06-13 Delberghe Cecile Dispositif permettant d'epurer des gaz, des fumees, ou de l'air vicie
SE517251C2 (sv) * 2000-08-30 2002-05-14 Gustav Berggren Komponent för reglering av avgasåterflöde
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AR082603A1 (es) * 2011-08-09 2012-12-19 Lavaque Oscar Un dispositivo solubilizador de dioxido de carbono en una bebida, de presion variable
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FR3001003B1 (fr) * 2013-01-17 2015-03-20 Dosatron International Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal.

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Also Published As

Publication number Publication date
CN106413869B (zh) 2019-11-01
WO2015101579A1 (fr) 2015-07-09
FR3016132A1 (fr) 2015-07-10
CN106413869A (zh) 2017-02-15
EP3092065A1 (de) 2016-11-16
FR3016132B1 (fr) 2016-02-05
US10232325B2 (en) 2019-03-19
ES2747921T3 (es) 2020-03-12
PL3092065T3 (pl) 2020-03-31
US20160325245A1 (en) 2016-11-10

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