WO2004069395A1 - Device for the production of mini-bubbles in a liquid - Google Patents

Device for the production of mini-bubbles in a liquid Download PDF

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Publication number
WO2004069395A1
WO2004069395A1 PCT/CH2004/000075 CH2004000075W WO2004069395A1 WO 2004069395 A1 WO2004069395 A1 WO 2004069395A1 CH 2004000075 W CH2004000075 W CH 2004000075W WO 2004069395 A1 WO2004069395 A1 WO 2004069395A1
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WO
WIPO (PCT)
Prior art keywords
disc
liquid
gas
bubbles
shaft
Prior art date
Application number
PCT/CH2004/000075
Other languages
French (fr)
Inventor
Kurt Hirschi
Original Assignee
Kurt Hirschi
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 Kurt Hirschi filed Critical Kurt Hirschi
Priority to EP04709564A priority Critical patent/EP1594599A1/en
Publication of WO2004069395A1 publication Critical patent/WO2004069395A1/en

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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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23363—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced above the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/93—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/834—Mixing in several steps, e.g. successive steps

Definitions

  • the present invention is in the field of devices for the production of small diameter bubbles in a liquid.
  • small diameter bubble means a bubble with a diameter of less than 5 mm.
  • mini-bubbles in a liquid finds a large number of applications.
  • mini-bubbles aims at ensuring a homogeneous mixture of liquids or solid particles in a liquid.
  • the present invention aims in particular to solve the aforementioned problems. It relates to a device for the production of mini-bubbles as defined in claim 1.
  • the mixing space constitutes a first place for the formation of bubbles.
  • the bubbles have characteristics fairly close to those produced with the devices of the prior art.
  • the second area where bubbles form in contact with the gas-liquid mixture is the bubbles.
  • the bubbles formed in the mixing space undergo a reduction in their diameter.
  • the mini bubbles thus produced have a narrow diameter distribution.
  • the device according to the invention makes it possible to obtain bubbles of very small diameter, p. ex. 0.05 mm.
  • the very small bubbles obtained with the device according to the invention can be trapped in the liquid, they do not rise to the surface, which makes it possible to conserve an aerated liquid.
  • the device according to the invention makes it possible to produce the mini-bubbles very quickly and to distribute them very homogeneously in the liquid.
  • the invention also offers possibilities of efficient applications in fields such as the aeration of slurry or the elimination of hydrocarbons in seas, lakes or rivers, the generation of mini-bubbles resulting in a thrust of the hydrocarbons in direction of the water surface.
  • the disc is designed to be driven in rotation by the displacement of the liquid. This mode can be applied for the production of mini-bubbles in a river.
  • the disc is preferably provided with blades.
  • the mixing space is open.
  • the gas-liquid mixture is entrained towards the disc, for example thanks to the vortex generated around the shaft during its rotation.
  • the shaft is hollow so as also to act as a gas inlet in the mixing space.
  • the contact surface of the disc has either grooves or longitudinal projections, each of them having one end directed, or even terminating, towards the periphery of the disc.
  • the grooves / projections have several functions. They promote in particular the reduction in the diameter of the bubbles produced in the mixing space and the ejection of the mini-bubbles in a direction substantially perpendicular to the main axis of the device.
  • the opposite face of the disc has a relief suitable for attracting a portion of the mini-bubbles in a direction substantially identical to that of the main axis of the device.
  • Figure 1 shows a first variant with a closed mixing space
  • FIG. 2 represents a second variant very close to the first.
  • FIG. 3 represents a third variant with a shaft arranged outside the mixing space.
  • FIG. 4 represents a fourth variant operating without a tree
  • Figure 5 shows a fifth variant
  • Figure 6 shows a sixth variant with an open mixing space
  • Figure 7 shows a seventh variant with two discs
  • FIG. 8 represents an embodiment of the face of the disc opposite to the contact face
  • FIG. 9 represents a first embodiment of the contact face of the disc
  • FIG. 10 represents a second embodiment of the contact face of the disc
  • FIG. 11 represents a third embodiment of the contact face of the disc
  • FIG. 12 represents a fourth embodiment of the contact face of the disc
  • FIG. 13 shows a fifth embodiment of the contact face of the disc.
  • FIG. 14 shows a sixth embodiment of the face of the disc opposite the contact face.
  • FIG. 15 represents a seventh embodiment of the contact face of the disc
  • FIG. 16 represents an eighth embodiment of the contact face of the disc
  • FIG. 17 represents a ninth embodiment of the contact face of the disc
  • Figure 18 shows the disc of Figure 17, opposite side.
  • the device shown in Figure 1 comprises a disc 1 fixed to a hollow shaft 3 driven by a motor 2 disposed outside the liquid 26. Near the disc 1 is a closed mixing space 5 which includes an inlet 9 liquid and an outlet passage 8. The portion of the shaft 3 disposed in the mixing space 5 comprises a gas inlet 4.
  • the device operates as follows: The rotation of the disc 1 driven by the shaft 3 - motor 2 assembly induces a vortex phenomenon around the shaft 3, which results in an aspiration of the gas (eg atmospheric air ) and liquid 26 in the mixing space 5.
  • the gas and / or the liquid can be actively introduced, eg under pressure, into the mixing space 5.
  • the gas-liquid mixture thus obtained is entrained towards the outlet passage 8 and contacts a face 6 of the disc 1, which has the effect of producing bubbles of diameter smaller than those already generated in the mixing space 5.
  • the device represented in FIG. 2 differs from that of FIG. 1 only in that the gas connection 12 is immersed in the liquid 26 and that the device comprises a gas chamber 18 traversed by the hollow shaft 3, the latter comprising at the gas chamber a gas inlet orifice 19.
  • the device of FIG. 3 is characterized by a mixing space 5 devoid of a shaft 3.
  • the entry of gas into the space 5 being produced by a gas inlet (not shown) arranged on a wall surrounding the space mixing 5.
  • the device illustrated in FIG. 4 is completely devoid of a tree.
  • a blade system 21 is fixed on the face 7 of the disc 1 which is opposite to the contact face 6. The rotation of the disc is ensured via the blade system 21 which is driven by the movement of the liquid 26.
  • a convex variant of the contact face 6 of the disc 1 will also be noted.
  • the device of FIG. 5 shows a full shaft 3, the gas being sucked in by a venturi disposed before the mixing space 5, the liquid inlet 9 being located in an adjacent duct and communicating with the mixing space 5 by by means of a pumping element 23, blades eg
  • FIG. 6 shows a device with an open mixing space 5, the gas being conveyed in the shaft 3 via a gas chamber 18.
  • the gas-liquid mixture is entrained in the direction of the disc 1 by the vortex 13 generated along the shaft 3.
  • Above the gas inlet 4 is a vortex cut-off element 25. Its presence leads the vortex to the gas inlet 4.
  • FIG. 7 presents a device different from that of FIG. 6 in the sense that it comprises a second disc 1 ".
  • Two gas inlets 4 are arranged on the portion of the shaft 3 which is located between the two discs 1, The free end of the shaft 3 comprises a second vortex cut-off element 25.
  • An additional gas inlet 4 is disposed on the shaft 3 between the second disc 1 'and the second vortex cut-off element 25 .
  • FIG. 8 shows an example of the face 7 of the disc 1 opposite the contact face 6. It has three ramps forming arcs of a circle.
  • FIG. 9 shows an example of the contact face 6 of the disc 1 with grooves 14 one end of which 15 is disposed on the periphery of the disc 1 and the other end of which tangentially ends in a circle of small diameter surrounding the center of the disc 1.
  • FIG. 10 shows another example of the contact face 6 of the disc with radial grooves 14, the section of the grooves being substantially circular.
  • FIG. 11 shows a variant identical to that of Figure 9 with the exception that the section of the grooves is square.
  • FIG. 12 shows another example of the contact face 6 of the disc with two sets of grooves, namely a set of radial grooves and a set of short grooves arranged obliquely towards the periphery of the disc 1.
  • FIGS. 13 to 15 show other examples of the contact face 6 of the disc with longitudinal projections 16.
  • the grooves / protrusions have one end terminating on the periphery of the disc. According to other variants not illustrated of the invention, the grooves / projections only extend over part of the radius of the disc.
  • the disc with conical fins 16 shown in FIG. 16 offers the advantage of creating a very powerful vortex inside the apparatus while transmitting a minimum of power to the output of the disc.
  • This disc makes it possible to reduce the size of the bubbles and to make them in a small container without them coalescing because of the proximity of the walls.
  • the conical disc illustrated in FIGS. 17 and 18 comprises on the envelope of the cone a series of grooves 28 distributed radially.
  • This configuration has the advantage of diffusing the microbubbles downwards and of having a particularly high "quantity of gas introduced" installed power "ratio.
  • Another advantage is the little mixing of the liquid (very important for wine, or in sewage treatment plants so as not to break the flocs)
  • the size of the bubbles is larger than with a finned disc (0.5 mm approximately).
  • the device according to the invention for the extraction of gas in a liquid, for example in oil.
  • the gas is removed inside the vortex.
  • the means which are normally used to inject a gas eg the shaft 3
  • the latter can be achieved by suction by means of a vacuum pump.
  • the length of the device varies between a few centimeters and a few meters and the diameter of the disc between one and a few tens of centimeters.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention relates to a device for the production of mini-bubbles in a liquid. The inventive device comprises a disk (1), drive means (2, 3) for rotating the disk (1) around an axis that is perpendicular thereto and a gas inlet (4). The invention is characterised in that it also comprises: (i) a gas/liquid mixing space (5) which is designed to house said liquid and which communicates with the gas inlet (4) and with the disk (1), and (ii) means (8, 13) for bringing the gas/liquid mixture obtained in the aforementioned mixing space (5) into contact with one of the faces (6) of the disk (1).

Description

Dispositif pour la production de mini-bulles dans un liquide Device for the production of mini-bubbles in a liquid
La présente invention se situe dans le domaine des dispositifs pour la production de bulles de faible diamètre dans un liquide.The present invention is in the field of devices for the production of small diameter bubbles in a liquid.
Dans le présent texte, on entend par bulle de faible diamètre (mini-bulle), une bulle de diamètre inférieur à 5 mm.In the present text, the term “small diameter bubble” (mini-bubble) means a bubble with a diameter of less than 5 mm.
La production de mini-bulles dans un liquide trouve un grand nombre d'applications. A titre d'exemple non-limitatif, on peut citer l'oxygénation de l'eau dans les stations d'épurations ou, plus généralement, l'aération de liquides.The production of mini-bubbles in a liquid finds a large number of applications. By way of non-limiting example, mention may be made of the oxygenation of water in treatment plants or, more generally, the aeration of liquids.
Dans d'autres applications, la production de mini-bulles vise à assurer un mélange homogène de liquides ou de particules solides dans un liquide.In other applications, the production of mini-bubbles aims at ensuring a homogeneous mixture of liquids or solid particles in a liquid.
On connaît plusieurs dispositifs pour la production de mini-bulles. Certains sont décrits dans les documents brevets suivants : GB 2 113 562 A, US 3 917 763, US 4 228 112, US 5 226 727, CH 655 019 A5, EP 0 388 066 A1 , US 3 814 396, US 4 193 951, US 4 741 870, US 5 160459.Several devices are known for producing mini-bubbles. Some are described in the following patent documents: GB 2 113 562 A, US 3 917 763, US 4 228 112, US 5 226 727, CH 655 019 A5, EP 0 388 066 A1, US 3 814 396, US 4 193 951 , US 4,741,870, US 5,160,459.
Les documents précités décrivent des dispositifs qui peuvent être divisés en deux groupes principaux :The aforementioned documents describe devices which can be divided into two main groups:
- Celui auquel appartient p. ex. US 3 917 763 qui décrit un disque creux à travers lequel le gaz circule et sort, - Celui auquel appartient p. ex. US 5 160 459 qui décrit un disque plein contre lequel le gaz est mis en contact. Dans les deux groupes, les bulles sont générées au niveau de la surface du disque rotatif.- The one to which p. ex. US 3,917,763 which describes a hollow disc through which the gas circulates and leaves, - The one to which belongs p. ex. US 5,160,459 which describes a solid disc against which the gas is brought into contact. In both groups, bubbles are generated at the surface of the rotating disc.
Bien que les dispositifs de l'état de la technique permettent parfois d'obtenir des bulles de relativement faible diamètre, on constate cependant plusieurs inconvénients tels qu'un taux de production chaotique des bulles (le système "crache"), une vibration du disque ou une inhomogénéité de la taille des bulles (large distribution de diamètres).Although the devices of the state of the art sometimes make it possible to obtain bubbles of relatively small diameter, there are however several disadvantages such as a rate of chaotic production of the bubbles (the system "spits"), a vibration of the disc or an inhomogeneity of the size of the bubbles (wide distribution of diameters).
La présente invention vise notamment à résoudre les problèmes précités. Elle se rapporte à un dispositif pour la production de mini-bulles tel que défini dans la revendication 1.The present invention aims in particular to solve the aforementioned problems. It relates to a device for the production of mini-bubbles as defined in claim 1.
L'espace de mélange constitué un premier lieu pour la formation de bulles. Dans cet endroit, les bulles ont des caractéristiques assez proches de celles produites avec les dispositifs de l'état de la technique. La zone de contact du mélange gaz-liquide avec le disque constitue un deuxième lieu pour la formation de bulles. A cet endroit, les bulles formées dans l'espace de mélange subissent une réduction de leur diamètre. Simultanément, les minibulles ainsi produites ont une distribution de diamètre étroite.The mixing space constitutes a first place for the formation of bubbles. In this place, the bubbles have characteristics fairly close to those produced with the devices of the prior art. The second area where bubbles form in contact with the gas-liquid mixture is the bubbles. At this point, the bubbles formed in the mixing space undergo a reduction in their diameter. Simultaneously, the mini bubbles thus produced have a narrow diameter distribution.
Le dispositif selon l'invention permet d'obtenir des bulles de diamètre très faible, p. ex. de 0.05 mm.The device according to the invention makes it possible to obtain bubbles of very small diameter, p. ex. 0.05 mm.
Les bulles de très faible dimension obtenues avec le dispositif selon l'invention peuvent être piégées dans le liquide, elles ne remontent pas jusqu'à la surface, ce qui permet de conserver un liquide aéré. En outre, le dispositif selon l'invention permet de produire très rapidement les mini-bulles et de les distribuer de manière très homogène dans le liquide.The very small bubbles obtained with the device according to the invention can be trapped in the liquid, they do not rise to the surface, which makes it possible to conserve an aerated liquid. In addition, the device according to the invention makes it possible to produce the mini-bubbles very quickly and to distribute them very homogeneously in the liquid.
L'invention offre également des possibilités d'applications performantes dans des domaines comme l'aération de lisier ou l'élimination d'hydrocarbures dans des mers, des lacs ou des rivières, la génération de mini-bulles résultant en une poussée des hydrocarbures en direction de la surface de l'eau.The invention also offers possibilities of efficient applications in fields such as the aeration of slurry or the elimination of hydrocarbons in seas, lakes or rivers, the generation of mini-bubbles resulting in a thrust of the hydrocarbons in direction of the water surface.
Il convient de noter qu'il existe certaines variantes de l'invention qui ne nécessitent pas le recours à un arbre pour entraîner le disque en rotation. On peut prévoir tout mécanisme de contrôle à distance de la rotation du disque, p. ex. par effet magnétique. Selon un mode avantageux, le disque est conçu pour être entraîné en rotation par le déplacement du liquide. Ce mode peut s'appliquer pour la production de mini-bulles dans une rivière. Dans ce cas, le disque est de préférence muni de pales.It should be noted that there are certain variants of the invention which do not require the use of a shaft to drive the disc in rotation. Any mechanism for remote control of the rotation of the disc can be provided, eg. ex. by magnetic effect. According to an advantageous mode, the disc is designed to be driven in rotation by the displacement of the liquid. This mode can be applied for the production of mini-bubbles in a river. In this case, the disc is preferably provided with blades.
Selon un mode de réalisation de l'invention, l'espace de mélange est ouvert. Dans cette configuration, le mélange gaz-liquide est entraîné vers le disque, par exemple grâce au vortex généré autour de l'arbre lors de sa rotation.According to one embodiment of the invention, the mixing space is open. In this configuration, the gas-liquid mixture is entrained towards the disc, for example thanks to the vortex generated around the shaft during its rotation.
Selon un autre mode de réalisation de l'invention, avec espace de mélange ouvert ou fermé, l'arbre est creux de manière faire également office d'arrivée de gaz dans l'espace de mélange.According to another embodiment of the invention, with an open or closed mixing space, the shaft is hollow so as also to act as a gas inlet in the mixing space.
Dans la plupart des variantes de l'invention, la surface de contact du disque comporte soit des rainures, soit des saillies longitudinales, chacune d'entre elles ayant une extrémité dirigée, voire aboutissant, vers la périphérie du disque. Les rainures/saillies ont plusieurs fonctions. Elles favorisent notamment la réduction du diamètre des bulles produites dans l'espace de mélange et l'éjection des minibulles dans une direction sensiblement perpendiculaire à l'axe principal du dispositif.In most variants of the invention, the contact surface of the disc has either grooves or longitudinal projections, each of them having one end directed, or even terminating, towards the periphery of the disc. The grooves / projections have several functions. They promote in particular the reduction in the diameter of the bubbles produced in the mixing space and the ejection of the mini-bubbles in a direction substantially perpendicular to the main axis of the device.
Avantageusement, la face opposée du disque présente un relief adapté pour attirer une partie des mini-bulles dans une direction sensiblement identique à celle de l'axe principal du dispositif.Advantageously, the opposite face of the disc has a relief suitable for attracting a portion of the mini-bubbles in a direction substantially identical to that of the main axis of the device.
L'invention sera décrite ci-dessous de manière plus détaillée au moyen des figures suivantes :The invention will be described below in more detail by means of the following figures:
La figure 1 représente un première variante avec un espace de mélange ferméFigure 1 shows a first variant with a closed mixing space
La figure 2 représente une deuxième variante très proche de la première La figure 3 représente une troisième variante avec un arbre disposé à l'extérieur de l'espace de mélange.FIG. 2 represents a second variant very close to the first. FIG. 3 represents a third variant with a shaft arranged outside the mixing space.
La figure 4 représente une quatrième variante fonctionnant sans arbreFIG. 4 represents a fourth variant operating without a tree
La figure 5 représente une cinquième variante La figure 6 représente une sixième variante avec un espace de mélange ouvertFigure 5 shows a fifth variant Figure 6 shows a sixth variant with an open mixing space
La figure 7 représente une septième variante munie de deux disquesFigure 7 shows a seventh variant with two discs
La figure 8 représente un mode de réalisation de la face du disque opposée à la face de contact La figure 9 représente un premier mode de réalisation de la face de contact du disqueFIG. 8 represents an embodiment of the face of the disc opposite to the contact face FIG. 9 represents a first embodiment of the contact face of the disc
La figure 10 représente un deuxième mode de réalisation de la face de contact du disqueFIG. 10 represents a second embodiment of the contact face of the disc
La figure 11 représente un troisième mode de réalisation de la face de contact du disqueFIG. 11 represents a third embodiment of the contact face of the disc
La figure 12 représente un quatrième mode de réalisation de la face de contact du disqueFIG. 12 represents a fourth embodiment of the contact face of the disc
La figure 13 représente un cinquième mode de réalisation de la face de contact du disque La figure 14 représente un sixième mode de réalisation de la face du disque opposée à la face de contactFIG. 13 shows a fifth embodiment of the contact face of the disc. FIG. 14 shows a sixth embodiment of the face of the disc opposite the contact face.
La figure 15 représente un septième mode de réalisation de la face de contact du disqueFIG. 15 represents a seventh embodiment of the contact face of the disc
La figure 16 représente un huitième mode de réalisation de la face de contact du disqueFIG. 16 represents an eighth embodiment of the contact face of the disc
La figure 17 représente un neuvième mode de réalisation de la face de contact du disqueFIG. 17 represents a ninth embodiment of the contact face of the disc
La figure 18 représente le disque de la figure 17, face opposée. Figure 18 shows the disc of Figure 17, opposite side.
Références numériques utilisées dans les figures :Numerical references used in the figures:
1. Disque1. Disc
2. Moteur électrique2. Electric motor
3. Arbre 4. Arrivée de gaz3. Tree 4. Gas inlet
5. Espace de mélange gaz-liquide5. Gas-liquid mixing space
6. (Disque) Face de contact6. (Disc) Contact face
7. (Disque) Face opposée7. (Disc) Opposite side
8. Sortie du mélange gaz-liquide 9. Orifice d'entrée de liquide8. Gas-liquid mixture outlet 9. Liquid inlet port
10. Zone de formation des mini-bulles10. Mini bubble formation area
11. Mini-bulles11. Mini bubbles
12. Raccord pour gaz 13.Vortex 14. Rainure12. Gas connection 13.Vortex 14. Groove
15. Extrémité de rainure15. Groove end
16. Saillie longitudinale16. Longitudinal projection
17. Extrémité de saillie longitudinale17. Longitudinal projection end
18. Chambre de gaz 19. Orifice d'entrée de gaz18. Gas chamber 19. Gas inlet port
20. Conduite de liquide20. Liquid line
21. Palier21. Landing
22. Joint d'étanchéité22. Seal
23. Elément de pompage de liquide 24. Elément d'injection23. Liquid pumping element 24. Injection element
25. Elément de coupure de vortex25. Vortex cut-off element
26. Liquide26. Liquid
27. Surface liquide 28. Gorge 29. Hélice Le dispositif représenté à la figure 1 comprend un disque 1 fixé à un arbre creux 3 entraîné par un moteur 2 disposé en dehors du liquide 26. A proximité du disque 1 se trouve un espace de mélange 5 fermé qui comprend un orifice d'entrée 9 de liquide et un passage de sortie 8. La portion de l'arbre 3 disposée dans l'espace de mélange 5 comprend une arrivée de gaz 4.27. Liquid surface 28. Throat 29. Propeller The device shown in Figure 1 comprises a disc 1 fixed to a hollow shaft 3 driven by a motor 2 disposed outside the liquid 26. Near the disc 1 is a closed mixing space 5 which includes an inlet 9 liquid and an outlet passage 8. The portion of the shaft 3 disposed in the mixing space 5 comprises a gas inlet 4.
Le dispositif fonctionne comme suit : La rotation du disque 1 entraîné par l'ensemble arbre 3 - moteur 2 induit un phénomène de vortex autour de l'arbre 3, ce qui résulte en une aspiration du gaz (p.ex. l'air atmosphérique) et du liquide 26 dans l'espace de mélange 5. Selon une variante, le gaz et/ou le liquide peuvent être introduits de manière active, p.ex. sous pression, dans l'espace de mélange 5.The device operates as follows: The rotation of the disc 1 driven by the shaft 3 - motor 2 assembly induces a vortex phenomenon around the shaft 3, which results in an aspiration of the gas (eg atmospheric air ) and liquid 26 in the mixing space 5. According to a variant, the gas and / or the liquid can be actively introduced, eg under pressure, into the mixing space 5.
Le mélange gaz-liquide ainsi obtenu est entraîné vers le passage de sortie 8 et contacte un face 6 du disque 1 , ce qui a pour effet de produire des bulles de diamètre inférieure à celles déjà générées dans l'espace de mélange 5.The gas-liquid mixture thus obtained is entrained towards the outlet passage 8 and contacts a face 6 of the disc 1, which has the effect of producing bubbles of diameter smaller than those already generated in the mixing space 5.
Le dispositif représenté à la figure 2 diffère de celui de la figure 1 uniquement en ce que le raccord pour gaz 12 est immergé dans le liquide 26 et que le dispositif comprend une chambre de gaz 18 traversée par l'arbre creux 3, ce dernier comprenant au niveau de la chambre de gaz un orifice d'entrée de gaz 19.The device represented in FIG. 2 differs from that of FIG. 1 only in that the gas connection 12 is immersed in the liquid 26 and that the device comprises a gas chamber 18 traversed by the hollow shaft 3, the latter comprising at the gas chamber a gas inlet orifice 19.
Le dispositif de la figure 3 est caractérisé par un espace de mélange 5 dépourvu d'arbre 3. L'entrée de gaz dans l'espace 5 étant réalisée par une arrivée de gaz (non-illustrée) disposée sur une paroi entourant l'espace de mélange 5.The device of FIG. 3 is characterized by a mixing space 5 devoid of a shaft 3. The entry of gas into the space 5 being produced by a gas inlet (not shown) arranged on a wall surrounding the space mixing 5.
Le dispositif illustré sur la figure 4 est totalement dépourvu d'arbre. Un système de pales 21 est fixé sur la face 7 du disque 1 qui est opposée à la face de contact 6. La rotation du disque est assurée via le système de pales 21 qui est entraîné par le mouvement du liquide 26. Dans cet exemple, on remarquera également une variante convexe de la face de contact 6 du disque 1. Le dispositif de la figure 5 montre un arbre 3 plein, le gaz étant aspiré par un venturi disposé avant l'espace de mélange 5, l'arrivée de liquide 9 étant située dans un conduit adjacent et communiquant avec l'espace de mélange 5 par l'intermédiaire d'un élément de pompage 23, des pales p.ex.The device illustrated in FIG. 4 is completely devoid of a tree. A blade system 21 is fixed on the face 7 of the disc 1 which is opposite to the contact face 6. The rotation of the disc is ensured via the blade system 21 which is driven by the movement of the liquid 26. In this example, a convex variant of the contact face 6 of the disc 1 will also be noted. The device of FIG. 5 shows a full shaft 3, the gas being sucked in by a venturi disposed before the mixing space 5, the liquid inlet 9 being located in an adjacent duct and communicating with the mixing space 5 by by means of a pumping element 23, blades eg
La figure 6 présente un dispositif avec un espace de mélange 5 ouvert, le gaz étant acheminé dans l'arbre 3 via une chambre de gaz 18. Le mélange gaz- liquide est entraîné en direction du disque 1 par le vortex 13 généré le long de l'arbre 3. En-dessus de l'arrivée de gaz 4 se trouve un élément de coupure de vortex 25. Sa présence conduit le vortex vers l'arrivée de gaz 4.FIG. 6 shows a device with an open mixing space 5, the gas being conveyed in the shaft 3 via a gas chamber 18. The gas-liquid mixture is entrained in the direction of the disc 1 by the vortex 13 generated along the shaft 3. Above the gas inlet 4 is a vortex cut-off element 25. Its presence leads the vortex to the gas inlet 4.
La figure 7 présente un dispositif différant de celui de la figure 6 dans le sens qu'il comprend un deuxième disque 1". Deux arrivées de gaz 4 sont disposées sur la portion de l'arbre 3 qui se situe entre les deux disques 1 ,1'. L'extrémité libre de l'arbre 3 comprend un deuxième élément de coupure de vortex 25. Une arrivée de gaz 4 supplémentaire est disposée sur l'arbre 3 entre le deuxième disque l' et le deuxième élément de coupure de vortex 25.FIG. 7 presents a device different from that of FIG. 6 in the sense that it comprises a second disc 1 ". Two gas inlets 4 are arranged on the portion of the shaft 3 which is located between the two discs 1, The free end of the shaft 3 comprises a second vortex cut-off element 25. An additional gas inlet 4 is disposed on the shaft 3 between the second disc 1 'and the second vortex cut-off element 25 .
La figure 8 montre un exemple de la face 7 du disque 1 opposée à la face de contact 6. Elle présente trois rampes formant des arcs de cercle.FIG. 8 shows an example of the face 7 of the disc 1 opposite the contact face 6. It has three ramps forming arcs of a circle.
La figure 9 montre un exemple de la face de contact 6 du disque 1 avec des rainures 14 dont une extrémité 15 est disposée sur la périphérie du disque 1 et dont l'autre extrémité aboutit tangentiellement à un cercle de faible diamètre entourant le centre du disque 1.FIG. 9 shows an example of the contact face 6 of the disc 1 with grooves 14 one end of which 15 is disposed on the periphery of the disc 1 and the other end of which tangentially ends in a circle of small diameter surrounding the center of the disc 1.
La figure 10 montre un autre exemple de la face de contact 6 du disque avec des rainures 14 radiales, la section des rainures étant sensiblement circulaire.FIG. 10 shows another example of the contact face 6 of the disc with radial grooves 14, the section of the grooves being substantially circular.
La figure 11 montre une variante identique à celle de la figure 9 à l'exception du fait que la section des rainures est carrée. La figure 12 montre un autre exemple de la face de contact 6 du disque avec deux jeux de rainures, soit un jeu de rainures radiales et un jeu de rainures courtes disposées obliquement vers la périphérie du disque 1.Figure 11 shows a variant identical to that of Figure 9 with the exception that the section of the grooves is square. FIG. 12 shows another example of the contact face 6 of the disc with two sets of grooves, namely a set of radial grooves and a set of short grooves arranged obliquely towards the periphery of the disc 1.
Les figures 13 à 15 présentent d'autres exemples de la face de contact 6 du disque avec des saillies longitudinales 16.FIGS. 13 to 15 show other examples of the contact face 6 of the disc with longitudinal projections 16.
Sur les figures 9 à 15, les rainures/saillies ont une extrémité aboutissant sur la périphérie du disque. Selon d'autres variantes non-illustrées de l'invention, les rainures/saillies ne s'étendent que sur une partie du rayon du disque.In Figures 9 to 15, the grooves / protrusions have one end terminating on the periphery of the disc. According to other variants not illustrated of the invention, the grooves / projections only extend over part of the radius of the disc.
Le disque à ailettes coniques 16 représenté sur la figure 16 offre l'avantage de créer un vortex très puissant à l'intérieur de l'appareil tout en transmettant un minimum de puissance à la sortie du disque. Ce disque permet de diminuer la taille des bulles et de les faire dans un petit récipient sans qu'elles coalescent à cause de la proximité des parois.The disc with conical fins 16 shown in FIG. 16 offers the advantage of creating a very powerful vortex inside the apparatus while transmitting a minimum of power to the output of the disc. This disc makes it possible to reduce the size of the bubbles and to make them in a small container without them coalescing because of the proximity of the walls.
Le disque conique illustré sur les figures 17 et 18 comporte sur l'enveloppe du cône une série de gorges 28 distribuées radialement. Cette configuration a l'avantage de diffuser les microbulles vers le bas et d'avoir un rapport "quantité de gaz introduite'ï'puissance installée" particulièrement élevé. Un autre avantage est le peu de brassage du liquide (très important pour le vin, ou dans les stations d'épuration pour ne pas casser les flocs) Par contre, la taille des bulles est plus grande qu'avec un disque à ailettes (0.5mm environ).The conical disc illustrated in FIGS. 17 and 18 comprises on the envelope of the cone a series of grooves 28 distributed radially. This configuration has the advantage of diffusing the microbubbles downwards and of having a particularly high "quantity of gas introduced" installed power "ratio. Another advantage is the little mixing of the liquid (very important for wine, or in sewage treatment plants so as not to break the flocs) On the other hand, the size of the bubbles is larger than with a finned disc (0.5 mm approximately).
La petite hélice 29 au verso du diffuseur conique (voir figure 18) crée un vortex contre le bas de la cuve et soulève ainsi les matières lourdes qui se déposent au fond dans certains mélanges. D'autres variantes non-illustrées de l'invention sont décrites dans la liste non- exhaustive suivante :The small propeller 29 on the back of the conical diffuser (see Figure 18) creates a vortex against the bottom of the tank and thus lifts heavy materials which settle at the bottom in certain mixtures. Other non-illustrated variants of the invention are described in the following non-exhaustive list:
- Conicité de l'espace de mélange conférant de la sorte un mélange amélioré gaz-liquide, - Intégration du dispositif selon l'invention dans une chaîne de fabrication- Conicity of the mixing space thus conferring an improved gas-liquid mixture, - Integration of the device according to the invention in a production line
(Processus in-Iine),(In-process),
- Moyens pour faire varier la pression au sein de l'espace de mélange, ce qui permet notamment de faire varier la taille des bulles,- Means for varying the pressure within the mixing space, which in particular makes it possible to vary the size of the bubbles,
- Clapet pour éviter un retour de liquide dans le conduit d'amenée du gaz, - Moyens pour faire varier la distance entre le disque et l'espace de mélange- Valve to prevent a return of liquid in the gas supply pipe, - Means for varying the distance between the disc and the mixing space
(plus la distance est courte, plus le vide est important),(the shorter the distance, the greater the vacuum),
- Utilisation du dispositif selon l'invention pour l'extraction de gaz dans un liquide, par exemple dans de l'huile. Le gaz est retiré à l'intérieur du vortex. Dans ce cas de figure, les moyens qui sont normalement utilisés pour injecter un gaz (p.ex. l'arbre 3) servent à l'évacuation du gaz. Cette dernière peut être réalisée par aspiration au moyen d'une pompe à vide.- Use of the device according to the invention for the extraction of gas in a liquid, for example in oil. The gas is removed inside the vortex. In this case, the means which are normally used to inject a gas (eg the shaft 3) are used for the evacuation of the gas. The latter can be achieved by suction by means of a vacuum pump.
Il va de soi que la présente invention ne se limite pas aux exemples précédents. N'importe quel matériau adapté à l'utilisation prévue peut être envisagé. De même, le choix des dimensions du dispositif n'est pas limité.It goes without saying that the present invention is not limited to the preceding examples. Any material suitable for the intended use can be considered. Similarly, the choice of dimensions of the device is not limited.
Le plus souvent cependant, la longueur du dispositif varie entre quelques centimètres et quelques mètres et le diamètre du disque entre un et quelques dizaines de centimètres. Most often, however, the length of the device varies between a few centimeters and a few meters and the diameter of the disc between one and a few tens of centimeters.

Claims

Revendications claims
1. Dispositif pour la production de mini-bulles dans un liquide comprenant :1. Device for the production of mini-bubbles in a liquid comprising:
- un disque (1), - des moyens (2,3) pour entraîner le disque (1) en rotation autour d'un axe qui lui est perpendiculaire,- a disc (1), - means (2,3) for driving the disc (1) in rotation about an axis which is perpendicular thereto,
- une arrivée de gaz (4), caractérisé en ce qu'il comprend en outre :- a gas inlet (4), characterized in that it further comprises:
- un espace de mélange gaz-liquide (5) adapté pour contenir ledit liquide, ledit espace (5) communiquant avec l'arrivée de gaz (4) et avec le disque (1),a gas-liquid mixing space (5) adapted to contain said liquid, said space (5) communicating with the gas inlet (4) and with the disc (1),
- des moyens (8,13) pour faire contacter avec l'une des faces (6) du disque (1) le mélange gaz-liquide obtenu dans ledit espace de mélange (5).- Means (8,13) for making contact with one of the faces (6) of the disc (1) the gas-liquid mixture obtained in said mixing space (5).
2. Dispositif selon la revendication précédente caractérisé par le fait que le disque (1) est fixé à un arbre (3) qui lui est perpendiculaire, ledit arbre (3) étant couplé à un système de rotation (2) tel qu'un moteur électrique.2. Device according to the preceding claim characterized in that the disc (1) is fixed to a shaft (3) which is perpendicular thereto, said shaft (3) being coupled to a rotation system (2) such as a motor electric.
3. Dispositif selon l'a revendication précédente caractérisé par le fait que l'arbre (3) traverse l'espace de mélange (5).3. Device according to a preceding claim characterized in that the shaft (3) passes through the mixing space (5).
4. Dispositif selon la revendication 1 caractérisé par le fait que le disque (1) a une géométrie conçue de manière à l'entraîner en rotation par mouvement du liquide environnant.4. Device according to claim 1 characterized in that the disc (1) has a geometry designed so as to cause it to rotate by movement of the surrounding liquid.
5. Dispositif selon l'une quelconque des revendications précédentes caractérisé par le fait qu'il comprend plusieurs disques (1 ,1') parallèles disposés le long d'un même arbre (3).5. Device according to any one of the preceding claims, characterized in that it comprises several parallel disks (1, 1 ') arranged along the same shaft (3).
6. Dispositif selon l'une quelconque des revendications précédentes caractérisé par le fait que l'espace de mélange (5) est ouvert.6. Device according to any one of the preceding claims, characterized in that the mixing space (5) is open.
7. Dispositif selon l'une quelconque des revendications précédentes caractérisé par le fait que lesdits moyens (13) pour faire contacter le mélange gaz-liquide avec le disque (1) sont constitués par le vortex généré autour de l'arbre(3) lors de sa rotation.7. Device according to any one of the preceding claims, characterized in that the said means (13) for contacting the gas-liquid mixture with the disc (1) are formed by the vortex generated around the shaft (3) during its rotation.
8. Dispositif selon l'une quelconque des revendications 1 à 5 caractérisé par le fait qu'à l'exception des entrées et sortie du gaz et du liquide (4,9) l'espace de mélange (5) est fermé.8. Device according to any one of claims 1 to 5 characterized in that, with the exception of the gas and liquid inlets and outlets (4,9) the mixing space (5) is closed.
9. Dispositif selon l'une quelconque des revendications 3 à 8 caractérisé par le fait que l'arbre (3) est creux et qu'il constitue ladite arrivée de gaz (4).9. Device according to any one of claims 3 to 8 characterized in that the shaft (3) is hollow and that it constitutes said gas inlet (4).
10. Dispositif selon l'une quelconque des revendications précédentes caractérisé par le fait que ladite face de contact (6) du disque (1) comprend des rainures (14) dont une extrémité (15) est dirigée vers la périphérie du disque (1).10. Device according to any one of the preceding claims, characterized in that said contact face (6) of the disc (1) comprises grooves (14), one end of which (15) is directed towards the periphery of the disc (1) .
11. Dispositif selon l'une quelconque des revendications 1 à 9 caractérisé par le fait que ladite face de contact (6) du disque (1) comprend des saillies longitudinales dont une extrémité (17) est dirigée vers la périphérie du disque 0).11. Device according to any one of claims 1 to 9 characterized in that said contact face (6) of the disc (1) comprises longitudinal projections of which one end (17) is directed towards the periphery of the disc 0).
12. Dispositif selon l'une quelconque des revendications précédentes caractérisé par le fait que l'autre face (7) du disque (1) comprend un relief (18) adapté pour induire un phénomène d'aspiration des bulles provenant de la face de contact (6) du disque (1 ).12. Device according to any one of the preceding claims, characterized in that the other face (7) of the disc (1) comprises a relief (18) adapted to induce a phenomenon of aspiration of the bubbles coming from the contact face. (6) of the disc (1).
13. Dispositif selon l'une quelconque des revendications précédentes comprenant des moyens pour faire varier le débit du gaz et/ou du liquide.13. Device according to any one of the preceding claims comprising means for varying the flow rate of the gas and / or the liquid.
14. Utilisation du dispositif selon l'une quelconque des revendications précédentes pour la fabrication de bulles de diamètre prédéfini. 14. Use of the device according to any one of the preceding claims for the manufacture of bubbles of predefined diameter.
5. Utilisation du dispositif selon l'une quelconque des revendications 1 à 13 pour l'extraction de gaz dans un liquide, notamment pour l'extraction de gaz dans de l'huile. 5. Use of the device according to any one of claims 1 to 13 for the extraction of gas in a liquid, in particular for the extraction of gas in oil.
PCT/CH2004/000075 2003-02-10 2004-02-10 Device for the production of mini-bubbles in a liquid WO2004069395A1 (en)

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CH195/03 2003-02-10

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2018111089A (en) * 2017-01-13 2018-07-19 直樹 會田 Stirrer for stirring device

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
FR2906688B1 (en) 2006-10-09 2012-04-20 Lavisse Isabelle Desjardins PROCESS FOR OBTAINING A PRODUCT SUBJECT TO GASIFICATION AND FREEZING

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Publication number Priority date Publication date Assignee Title
FR2167688A1 (en) * 1972-01-05 1973-08-24 Hege Advanced Systems Corp High energy rotary mixer - with recycle of one constituent to mix with other in rotor
US5336399A (en) * 1991-12-27 1994-08-09 Takekazu Kajisono Apparatus for purifying and activating water
DE29722388U1 (en) * 1997-12-18 1998-03-26 Hester Hilmar Multi-component mixing device
WO1999008780A1 (en) * 1997-08-20 1999-02-25 Tva Technologies Pty Ltd Improved mixing and aerating apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2167688A1 (en) * 1972-01-05 1973-08-24 Hege Advanced Systems Corp High energy rotary mixer - with recycle of one constituent to mix with other in rotor
US5336399A (en) * 1991-12-27 1994-08-09 Takekazu Kajisono Apparatus for purifying and activating water
WO1999008780A1 (en) * 1997-08-20 1999-02-25 Tva Technologies Pty Ltd Improved mixing and aerating apparatus
DE29722388U1 (en) * 1997-12-18 1998-03-26 Hester Hilmar Multi-component mixing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018111089A (en) * 2017-01-13 2018-07-19 直樹 會田 Stirrer for stirring device

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