EP3092065B1 - Premixer and associated installation - Google Patents
Premixer and associated installation Download PDFInfo
- 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
Links
- 238000009434 installation Methods 0.000 title claims description 7
- 239000012530 fluid Substances 0.000 claims description 57
- 239000000203 mixture Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 239000000654 additive Substances 0.000 description 8
- 230000000996 additive effect Effects 0.000 description 8
- 239000006260 foam Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003995 emulsifying agent Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000008241 heterogeneous mixture Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Images
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.
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- 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)
Description
La présente invention concerne un prémélangeur et une installation comprenant un tel prémélangeur.The present invention relates to a premixer and an installation comprising such a premixer.
L'eau est souvent insuffisante pour éteindre certains incendies. Ainsi, lors de feux de solide (classe A) un additif est à mélanger à l'eau pour la rendre pénétrante. Des feux d'hydrocarbures ou de solvant polaire requièrent un étouffement par une mousse. Cette mousse est un mélange hétérogène d'air et d'eau additivée, obtenue à l'aide d'un agent émulseur et d'un générateur de mousse. L'étouffement par la mousse ou d'eau additivée est utilisé couramment par les sapeurs-pompiers en intervention ou préventivement prévu sur des installations fixes en cas de stockage de produits dangereux. La production de mousse est généralement obtenue à l'aide d'une pompe, d'un réservoir contenant un émulseur ou un additif, un système d'injection et de dosage de l'émulseur et un générateur de mousse.Water is often insufficient to extinguish certain fires. Thus, during solid fires (class A) 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.
Il est donc souhaitable de disposer de système d'injection et de dosage de l'émulseur qui soit efficace et fiable.It is therefore desirable to have an injection system and dosage of the emulsifier that is effective and reliable.
Pour cela, il est connu d'utiliser des systèmes mécaniques fiables fonctionnant sur une large plage de débit.For this, it is known to use reliable mechanical systems operating over a wide range of flow.
Toutefois, ces systèmes sont relativement lourds et relativement chers.However, these systems are relatively heavy and relatively expensive.
Il est également connu d'employer des systèmes électroniques fonctionnant aussi sur une large plage de débit.It is also known to employ electronic systems also operating over a wide range of flow.
Mais, ces systèmes électroniques sont tributaires d'une alimentation électrique, relativement chers et présentent l'inconvénient d'impliquer un entretien fréquent, ce qui est pénalisant pour les utilisateurs.But, these electronic systems are dependent on a power supply, relatively expensive and have the disadvantage of involving frequent maintenance, which is detrimental for users.
Des systèmes appelées systèmes USD, acronyme pour « Unité de Stockage et de Dosage », sont également employés.Systems called USD systems, acronym for "Storage and Dosage Unit", are also used.
Néanmoins, ces systèmes USD posent souvent des problèmes de maintenance et de fiabilité. Ils présentent les inconvénients de ne pas pouvoir être rechargés en cours d'utilisation et de ne pas pouvoir évaluer le volume d'émulseur restant disponible dans le réservoir pour l'injection. Ces systèmes USD sont aussi relativement volumineux.Nevertheless, these USD systems often pose maintenance and reliability issues. They have the disadvantages of not being able to be recharged during use and not being able to evaluate the volume of foam concentrate remaining available in the tank for injection. These USD systems are also relatively large.
Enfin, il est aussi connu d'utiliser un système de type Venturi qui est plus simple et moins cher que les systèmes précédents. Un système de type Venturi permet l'injection de liquide dans un réseau sous pression. Cette injection est obtenue par aspiration du liquide à injecter grâce à une diminution de la pression statique. C'est une augmentation de la vitesse dans le réseau qui permet de faire chuter la pression statique.Finally, it is also known to use a Venturi type system that is simpler and cheaper than previous systems. 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.
Toutefois, le fonctionnement d'un tel système de type Venturi impose un débit de fluide précis dans le réseau pour fonctionner. En dessous d'un débit minimal l'aspiration ne se fait pas et au-dessus d'un débit maximal, le dosage n'est pas suffisamment précis, voire inexistant. Ainsi, un système de type Venturi n'est propre à fonctionner qu'avec certains types d'équipement. Le document
Il existe donc un besoin pour un système permettant l'injection et le dosage d'additif dans un fluide qui puisse fonctionner sur une large plage de débit tout en étant de mise en oeuvre aisée.There is therefore a need for a system for injecting and dosing additive in a fluid that can operate over a wide range of flow while being easy to implement.
A cet effet, l'invention a pour objet un prémélangeur fluidique selon la revendication 1.For this purpose, the subject of the invention is a fluid premixer according to claim 1.
Suivant des modes particuliers de réalisation, le prémélangeur est selon l'une quelconque des revendications 2 à 10.According to particular embodiments, the premixer is according to any one of claims 2 to 10.
Il est également proposé une installation selon la revendication 11.An installation according to claim 11 is also proposed.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, qui sont :
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figure 1 , une vue en perspective d'un prémélangeur ; -
figure 2 , une vue schématique en coupe d'un exemple d'une partie du prémélangeur, -
figure 3 , une vue schématique en coupe d'une autre partie du prémélangeur, et -
figure 4 , une vue schématique en coupe d'un autre exemple d'une partie du prémélangeur.
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figure 1 , a perspective view of a premixer; -
figure 2 , a schematic sectional view of an example of a part of the premixer, -
figure 3 , a schematic sectional view of another part of the premixer, and -
figure 4 , a schematic sectional view of another example of a part of the premixer.
Un prémélangeur 10 est représenté en perspective à la
Le sens de circulation du fluide dans le prémélangeur 10 permet de définir les termes « amont » et « aval » pour la suite de la description. Une première unité est en amont d'une deuxième unité lorsque le fluide circule depuis la première unité vers la deuxième unité. Similairement, une première unité est en aval d'une deuxième unité lorsque le fluide circule depuis la deuxième unité vers la première unité.The flow direction of the fluid in the
Le prémélangeur 10 comporte un conduit 12 et un boîtier 14. Le conduit 12, représenté plus en détail à la
Le conduit 12 s'étend selon un axe X. En outre, selon l'exemple de la
La première entrée 16 est propre à accueillir un premier fluide. Par exemple, le premier fluide est de l'eau sous pression.The
La première entrée 16 est propre à être reliée à un réseau sous pression. Par réseau sous pression, il est entendu un réseau dans lequel circule un fluide sous pression, c'est-à-dire un fluide dont la pression est supérieure à 1 bar.The
La première entrée 16 et la sortie 22 sont coaxiales. En variante, la première entrée 16 et la sortie 22 ne sont pas coaxiales, le conduit 12 comportant par exemple un coude. Dans une telle situation, l'axe X est défini à l'aide du col 20.The
La première entrée 16 est un embout dont la section transversale dans un plan perpendiculaire à l'axe X est sensiblement constante le long de l'axe X.The
La sortie 22 est également un embout de section transversale sensiblement constante le long de l'axe X.The
De préférence, l'aire de la section transversale de la première entrée 16 et l'aire de la section transversale de la sortie 22 sont égales. Cela permet de faciliter l'adaptation du prémélangeur 10 à tout système.Preferably, the cross sectional area of the
Le col 20 est situé entre la première entrée 16 et la sortie 22. De préférence, comme c'est le cas pour l'exemple de la
Le convergent 30 relie la première entrée 16 au col 20. L'aire de la section transversale du convergent 30 diminue progressivement depuis la première entrée 16 vers le col 20. Dans le cas particulier de la
Le divergent 32 relie le col 20 à la sortie 22. L'aire de la section transversale du divergent 32 augmente progressivement depuis l'amont vers l'aval, c'est-à-dire depuis le col 20 vers la sortie 22. Dans le cas particulier de la
L'obturateur 24 du conduit 12 est mobile entre plusieurs positions définissant chacune un degré d'obturation distinct du conduit 12.The
L'obturateur 24 obture au moins partiellement le col 20.The
L'obturateur 24 délimite un passage dans le col 20, dont la section présente une aire variable en fonction de la position de l'obturateur 24. Le passage est annulaire.The
L'obturateur 24 s'étend dans le col 20. L'obturateur 24 est profilé et se prolonge dans le divergent 32.The
L'obturateur 24 comporte une partie avant effilée vers l'amont et une partie arrière effilée vers l'aval.The
Selon l'exemple de la
Dans le sens de l'invention, un obturateur 24 est une ogive si l'obturateur 24 présente une partie avant affinée du côté amont et une partie arrière affinée du côté aval.In the sense of the invention, a
En outre, de préférence, l'obturateur 24 est une ogive axisymétrique.In addition, preferably, the
L'obturateur 24 est mobile d'une position à une autre par une translation selon l'axe X.The
De préférence, l'obturateur 24 est mobile entre toutes les positions situées entre deux positions extrémales, la première position extrémale correspondant à une position dans laquelle l'obturateur 24 obture entièrement le conduit 12 et une deuxième position extrémale correspondant à une position dans laquelle l'obturateur 24 est dans la sortie 22 et laisse libre toute la section du col 20. Cela permet de faire varier l'aire de la section transversale de passage du col 20 en fonction de la position de l'obturateur 24.Preferably, the
La deuxième entrée 18 est, ainsi que visible aux
La deuxième entrée 18 est propre à être reliée à un réservoir de fluide à injecter dans le premier fluide.The
La conduite est pourvue d'un organe d'obturation 26 de la deuxième entrée 18.The pipe is provided with a
L'organe d'obturation 26 est mobile entre plusieurs positions définissant chacune un degré d'obturation distinct de la deuxième entrée 18. Par exemple, l'organe d'obturation 26 est un piston.The
La position de l'organe d'obturation 26 est fonction de la position de l'obturateur 24 du conduit 12.The position of the
Cela permet de réguler le passage du deuxième fluide en fonction du débit du premier fluide dans le conduit 12. Autrement dit, une variation du débit du premier fluide dans le conduit 12 entraîne une variation proportionnelle du débit du deuxième fluide dans la deuxième entrée 18. Ainsi, le débit du deuxième fluide injecté est un pourcentage constant du débit du premier fluide circulant dans le conduit 12.This makes it possible to regulate the passage of the second fluid as a function of the flow rate of the first fluid in the
Par exemple, l'injection du deuxième fluide dans le premier fluide est comprise entre 0,1% et 6% du premier fluide.For example, the injection of the second fluid into the first fluid is between 0.1% and 6% of the first fluid.
Le boîtier 14 comporte, selon le mode de réalisation illustré, un élément de commande 34, un indicateur 36 de la position de l'obturateur 24, une vanne de commande 38 et une vanne de rinçage 40.The
L'élément de commande 34 est propre à commander la position de l'obturateur 24 en fonction de la différence de pression entre la première pression P1 et la deuxième pression P2. Par définition, la perte de charge du prémélangeur 10 est la différence entre la première pression P1 et la deuxième pression P2.The
Selon un autre mode de réalisation, l'élément de commande 34 est un piston à double effet extérieur au prémélangeur 10. De préférence, dans un tel cas, les surfaces du piston sont proportionnelles à la différence entre la première pression P1 et la deuxième pression P2.According to another embodiment, the
En variante, l'élément de commande 34 est un élément de commande 34 électrique. A titre d'illustration, l'élément de commande 34 est un vérin électrique.Alternatively, the
L'indicateur 36 de la position de l'obturateur 24 permet d'indiquer le débit de fluide dans le conduit 12.The
Par exemple, l'indicateur 36 est une aiguille positionnée sur une échelle graduée. La position de l'aiguille est liée à la position de l'obturateur 24.For example, the
En variante, l'indicateur 36 est relié à un indicateur électrique.Alternatively, the
La vanne de commande 38 permet de modifier la pression sur l'élément de commande 34 de manière à positionner l'obturateur 24 dans la position dans laquelle l'obturateur 24 est dans la sortie 22 et laisse libre toute la section du col 20.The
La vanne de rinçage 40 est propre à basculer entre deux positions, une position de fonctionnement du prémélangeur 10 dans laquelle la vanne de rinçage 40 ne joue pas de rôle et une position de nettoyage du prémélangeur 10 dans laquelle il est possible de rincer le prémélangeur 10 après utilisation.The flushing
Le fonctionnement du prémélangeur 10 est maintenant décrit.The operation of the
Lorsque la vanne de commande 38 est mise dans la première position, le fluide injecté à la première entrée 16 sort par la sortie 22 après passage dans le conduit 12.When the
Le col 20 génère une accélération du fluide qui provoque une dépression, laquelle dépression permet de générer une aspiration dans la deuxième entrée 18 par laquelle est injecté de l'additif. L'aspiration dépend donc de la section de passage du col 20, elle-même fonction de la position de l'obturateur 24.The
Le mélange de l'additif avec le premier fluide génère un mélange qui sort par la sortie 22.Mixing the additive with the first fluid generates a mixture that exits through the
La position de l'obturateur 24 étant fonction du débit du premier fluide dans le conduit 12 du prémélangeur 10, la quantité d'additif injecté est ainsi liée au débit du premier fluide.The position of the
Lorsque la vanne de commande 38 est mise dans la deuxième position, l'obturateur 24 se positionne de manière à limiter l'obturation du col 20. Cela permet d'éviter les pertes de charge lorsqu'il n'est pas désiré de produire un mélange.When the
Dans la première position de la vanne de commande 38, il est ainsi réalisé un col 20 dont la géométrie est variable. Ceci permet d'obtenir un effet Venturi contrôlable via la géométrie du col 20, géométrie qui est contrôlée par la position de l'obturateur 24.In the first position of the
De ce fait, cela permet de maintenir une vitesse constante dans le col 20. Cette vitesse est suffisante pour permettre une aspiration quelque soit le débit du premier fluide dans le prémélangeur 10. Un tel prémélangeur 10 assure donc à son utilisateur de pouvoir aspirer le deuxième fluide indépendamment du débit du premier fluide. Cela permet de rendre la mise en oeuvre du prémélangeur 10 plus aisé.As a result, this makes it possible to maintain a constant speed in the
Un tel prémélangeur 10 est donc utilisable sur une large plage de débit. En outre, comme le prémélangeur 10 utilise un col 20 assurant un effet Venturi, les avantages propres à ces systèmes sont conservés. Le prémélangeur 10 est donc léger, utilisable sur une large plage de débit et présente une bonne fiabilité et un prix relativement faible.Such a
De plus, l'emploi d'un tel prémélangeur 10 permet de limiter la perte de charge. Typiquement, au maximum, la perte de charge est limitée à 30 ou 40%.In addition, the use of such a
En outre, un tel prémélangeur 10 est utilisable pour tout type de système, et ce indépendamment des caractéristiques propres au système. Notamment, le même prémélangeur 10 est utilisable pour des systèmes respectant des normes différentes, rendant ce prémélangeur 10 adaptable notamment à une pluralité de territoire géographique sans modifier le prémélangeur 10.In addition, such a
En particulier, un tel prémélangeur 10 est utilisable dans une installation propre à délivrer le mélange de fluide. Selon les cas, l'installation est une installation fixe ou mobile.In particular, such a
De plus, un tel prémélangeur 10 permet d'obtenir un dosage précis de la quantité de deuxième fluide injectée dans le premier fluide.In addition, such a
Le prémélangeur 10 proposé trouve son application dans de multiples domaines dont les systèmes d'épandage en agriculture, la médecine, certains systèmes d'injection dans l'industrie et le domaine de la lutte contre l'incendie.The proposed
D'autres modes de réalisations sont envisageables pour le prémélangeur 10, et notamment des modes de réalisation plus simples dans lesquels le prémélangeur 10 comporte seulement le conduit 12, l'obturateur 24 du conduit 12 et l'élément de commande 34.Other embodiments are possible for the
Selon un mode de réalisation illustré par la
En fonctionnement, le premier piston 34A est soumis à la première pression P1 tandis que le deuxième piston 34B est soumis à la deuxième pression P2. L'élément de commande 34 est donc propre à commander la position de l'obturateur 24 en fonction de la différence de pression entre la première pression P1 et la deuxième pression P2. Le même principe de fonctionnement permet de maintenir la vanne de commande 38.In operation, the
Claims (11)
- A fluid premixer (10) for mixing a first fluid and a second fluid by aspirating the second fluid into the first fluid by Venturi effect, the premixer (10) comprising a pipe (12) including:- a first inlet (16) for the first fluid at a first pressure (P1),- a second inlet (18) for the second fluid to be mixed into the first fluid to form a mixture,- an outlet (22) for the mixture at a second pressure (P2), and- a shutter (24) of the pipe (12) movable between several positions each defining a distinct degree of shutting of the pipe (12),the premixer including a neck (20) situated between the first inlet (16) and the outlet (22), the second inlet (18) being a pipe emerging in an inlet supplying the neck (20), characterized in that the premixer (10) further includes a control element (34) able to control the position of the shutter (24) depending on the difference between the first pressure (P1) and the second pressure (P2).
- The premixer according to claim 1, wherein the pipe (12) has a convergent tube (30) and a divergent tube (32) that are coaxial, thus defining an axis (X) along which the pipe (12) extends and the second inlet (18) extends along a direction not collinear with the axis (X) of the pipe, and advantageously perpendicular to the axis (X).
- The premixer according to claim 1 or 2, wherein the pipe (12) has a convergent tube (30) and a divergent tube (32) that are coaxial, thus defining an axis (X) along which the pipe (12) extends, the shutter (24) being movable from another position by translation along the axis (X) along which the pipe (12) extends.
- The premixer according to any one of claims 1 to 3, wherein the shutter (24) is a part movable along the direction of the flow of the first fluid.
- The premixer according to any one of claims 1 to 4, wherein the control element (34) comprises at least one piston having a section proportional to the difference between the first pressure (P1) and the second pressure (P2).
- The premixer according to any one of claims 1 to 5, comprising a shutter member (26) for the second inlet (18) movable between several positions each defining a distinct degree of shutting of the second inlet (18), the position of the shutter member (26) depending on the position of the shutter (24) of the pipe (12).
- The premixer according to any one of claims 1 to 6, further comprising an indicator (36) of the position of the shutter (24).
- The premixer according to any one of claims 1 to 7, wherein the shutter (24) is movable into a position with a minimal degree of shutting of the pipe (12), the premixer (10) being provided with a control valve (38) making it possible to position the shutter (24) in the position with the minimal degree of shutting of the pipe (12).
- The premixer according to any one of claims 1 to 8, wherein the control element comprises two pistons (34A, 34B) with different cross-sections, each piston (34A, 34B) being connected to the shutter (24).
- The premixer according to any one of claims 1 to 9, wherein the second inlet (18) emerges in the pipe (12) between the first inlet (16) and the outlet (22).
- An installation able to deliver a fluid mixture comprising a premixer (10) according to any one of claims 1 to 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14828478T PL3092065T3 (en) | 2014-01-06 | 2014-12-24 | Premixer and associated installation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1450054A FR3016132B1 (en) | 2014-01-06 | 2014-01-06 | PREMIXER AND ASSOCIATED INSTALLATION |
PCT/EP2014/079292 WO2015101579A1 (en) | 2014-01-06 | 2014-12-24 | Premixer and associated installation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3092065A1 EP3092065A1 (en) | 2016-11-16 |
EP3092065B1 true EP3092065B1 (en) | 2019-07-10 |
Family
ID=50473541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14828478.9A Active EP3092065B1 (en) | 2014-01-06 | 2014-12-24 | Premixer and associated installation |
Country Status (7)
Country | Link |
---|---|
US (1) | US10232325B2 (en) |
EP (1) | EP3092065B1 (en) |
CN (1) | CN106413869B (en) |
ES (1) | ES2747921T3 (en) |
FR (1) | FR3016132B1 (en) |
PL (1) | PL3092065T3 (en) |
WO (1) | WO2015101579A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR082603A1 (en) * | 2011-08-09 | 2012-12-19 | Lavaque Oscar | A CARBON DIOXIDE SOLUBILIZING DEVICE IN A VARIABLE PRESSURE DRINK |
US9815557B2 (en) * | 2012-09-20 | 2017-11-14 | Humbay Health, LLC | Aircraft humidifier |
CN106807297A (en) * | 2017-03-20 | 2017-06-09 | 中国石油大学(华东) | A kind of equal mixing device of gas-liquid for before mixing pump entrance under water |
CN110448829A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | Suction type three-phase froth generating device and methods and applications |
CN111450719B (en) * | 2020-04-13 | 2021-03-02 | 四川大学 | Composite Venturi type micro-bubble generating device |
Family Cites Families (16)
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USRE24291E (en) * | 1957-03-19 | Device for introducing atomized liquid into gas under pressure | ||
US86030A (en) * | 1869-01-19 | Alexander morton | ||
US1372740A (en) * | 1917-06-13 | 1921-03-29 | Lynn A Williams | Carbureter |
US2017311A (en) * | 1927-12-05 | 1935-10-15 | Jacobson Eugene | Flow-responsive device |
DE1751733A1 (en) * | 1968-07-19 | 1971-04-29 | Porsche Kg | Electronically controlled carburetor |
US4530805A (en) * | 1980-12-10 | 1985-07-23 | Abbey Harold | Flow regulating carburetors |
US5061406A (en) * | 1990-09-25 | 1991-10-29 | Union Carbide Industrial Gases Technology Corporation | In-line gas/liquid dispersion |
DE4215286A1 (en) * | 1992-05-09 | 1993-11-11 | Hermann Dr Ing Golle | Carburation device to form mixture of fluid and gaseous mediums - has secondary Venturi nozzles in air funnel wall, and fuel nozzles inside Venturi nozzles |
FR2733696B3 (en) * | 1995-05-04 | 1997-06-13 | Delberghe Cecile | DEVICE FOR PURIFYING GASES, FUMES, OR EXHAUST AIR |
SE517251C2 (en) * | 2000-08-30 | 2002-05-14 | Gustav Berggren | Component for controlling exhaust gas reflux |
US6886545B1 (en) * | 2004-03-05 | 2005-05-03 | Haldex Hydraulics Ab | Control scheme for exhaust gas circulation system |
US7354029B1 (en) * | 2004-05-28 | 2008-04-08 | Alex Rutstein | Apparatus and method for treating process fluids |
US7886727B2 (en) * | 2009-05-26 | 2011-02-15 | Ford Global Technologies, Llc | Variable venturi system and method for engine |
AR082603A1 (en) * | 2011-08-09 | 2012-12-19 | Lavaque Oscar | A CARBON DIOXIDE SOLUBILIZING DEVICE IN A VARIABLE PRESSURE DRINK |
US9074540B2 (en) * | 2012-04-19 | 2015-07-07 | Cummins Inc. | Exhaust gas recirculation systems with variable venturi devices |
FR3001003B1 (en) * | 2013-01-17 | 2015-03-20 | Dosatron International | ASSAY DEVICE FOR INTRODUCING A LIQUID ADDITIVE IN A MAIN LIQUID CURRENT. |
-
2014
- 2014-01-06 FR FR1450054A patent/FR3016132B1/en active Active
- 2014-12-24 US US15/109,633 patent/US10232325B2/en active Active
- 2014-12-24 PL PL14828478T patent/PL3092065T3/en unknown
- 2014-12-24 WO PCT/EP2014/079292 patent/WO2015101579A1/en active Application Filing
- 2014-12-24 ES ES14828478T patent/ES2747921T3/en active Active
- 2014-12-24 CN CN201480072486.8A patent/CN106413869B/en active Active
- 2014-12-24 EP EP14828478.9A patent/EP3092065B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
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CN106413869B (en) | 2019-11-01 |
ES2747921T3 (en) | 2020-03-12 |
US20160325245A1 (en) | 2016-11-10 |
FR3016132A1 (en) | 2015-07-10 |
EP3092065A1 (en) | 2016-11-16 |
US10232325B2 (en) | 2019-03-19 |
PL3092065T3 (en) | 2020-03-31 |
CN106413869A (en) | 2017-02-15 |
WO2015101579A1 (en) | 2015-07-09 |
FR3016132B1 (en) | 2016-02-05 |
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