EP1797963A1 - Mixing chamber and spraying device comprising said chamber - Google Patents

Mixing chamber and spraying device comprising said chamber Download PDF

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Publication number
EP1797963A1
EP1797963A1 EP06291903A EP06291903A EP1797963A1 EP 1797963 A1 EP1797963 A1 EP 1797963A1 EP 06291903 A EP06291903 A EP 06291903A EP 06291903 A EP06291903 A EP 06291903A EP 1797963 A1 EP1797963 A1 EP 1797963A1
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EP
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Prior art keywords
gas
liquid
mixing chamber
chamber
orifices
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EP06291903A
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German (de)
French (fr)
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EP1797963B1 (en
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Frédéric Bury
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0458—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being perpendicular just upstream the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point

Definitions

  • the present invention relates to a chamber for mixing a liquid with a gas, in particular integrated in a device for spraying the mixture.
  • liquid-gas mixing chamber for sprayer which extends in a longitudinal direction, which is delimited by an enclosure, and which comprises an inlet opening for introducing the liquid located at a first longitudinal end, orifices. for introducing the gas, and an outlet opening for evacuating the liquid-gas mixture located at the second longitudinal end.
  • the liquid in order to have an efficient spray of the mixture, it is necessary to have a significant mechanical energy.
  • the liquid in order to compensate for the losses of charges occurring in the enclosure and the other associated devices for spraying, the liquid is introduced with a pressure of between 10 and 30 bar, which has a cost.
  • the liquid (and the mixture) has a high speed, and in order to avoid rapid wear of the enclosure and other associated devices, the liquid can not be loaded with particles having a large particle size (at from 0.25 mm).
  • the gas is introduced with a higher pressure at 6 bars, which leads to a high consumption of gas (the ratio of the mass of the gas to the mass of the liquid is often greater than 0.3), which has a cost.
  • the present invention aims to provide a mixing chamber that can be used in particular in a spraying device does not have the aforementioned drawbacks.
  • the gas introduction orifices are made in the chamber and are arranged so that the gas forms a film preventing any contact between the liquid and the chamber and mixes with the liquid inside the chamber. the space delimited by the film.
  • the liquid-gas mixture is inside this gaseous sheath, without the use of any additional mechanical component, which makes it possible to considerably reduce the losses, and to charge the liquid with relatively large particles (having a particle size greater than several millimeters).
  • the mixture since the mixture is not in contact with the enclosure, the early separation is considerably reduced.
  • the mixture obtained in the combustion chamber is of such a quality that, in the case where it comprises water (from, for example, water vapor contained in the gas), it is an emulsion .
  • a spraying device 1 comprises a mixing chamber 2 in which a liquid-gas mixture 3 is produced.
  • the spraying device 1 is integrated in a burner, the liquid 4 being a liquid fuel, and the gas 5 may be air, combustible gas, water vapor or a mixture of at least two of these elements.
  • the mixing chamber 2 extends in a longitudinal direction 6, and is delimited by an enclosure 7 which in the present example is of cylindrical shape.
  • the mixing chamber 2 comprises an inlet opening 8 which is located at a first longitudinal end and which allows the introduction of the liquid 4.
  • the supply of the mixing chamber 2 in liquid is carried out by an introduction member 9 which is connected to the inlet opening 8 by at least one introduction line 10 (in this case by a pipe 10).
  • the mixing chamber 2 comprises an outlet opening 11 which is located at the second longitudinal end and which allows the evacuation of the liquid-gas mixture 3.
  • an ejection member 12 is connected to the outlet opening 11 and comprises at least one outlet line 13 for spraying the mixture at its outlet.
  • the ejection member 12 comprises only one outlet duct 13 which is cylindrical in shape and which is oriented in the longitudinal direction 6.
  • the body of FIG. ejection 12 comprises two outlet ducts 13 which are cylindrical in shape, which are oriented so that their director axis 16 makes an angle 17 with the longitudinal direction 6 and which are arranged diametrically opposite.
  • the mixing chamber 2 comprises orifices 14 which allow the introduction of the gas 5 and which are made in the chamber 7 and pass through. These orifices 14 are arranged so that the gas 5, on the one hand, forms a film 15 preventing the liquid 4 from circulating against the enclosure 7, and, on the other hand, mixes with the liquid 4 inside. the space delimited by the film 15. These orifices 14 must be sufficiently numerous to allow the production of the film 15 which avoids the recondensation of the mixture on the walls of the enclosure 7.
  • the orifices 14 extend to the downstream end of the mixing chamber 2 and the ejection member 12 is reduced at best (its purpose being to serve as support to the outlet conduits 13 which define the orientation of the spray).
  • the gas introduction orifices 14 are formed by the chamber 7 which is made of a porous material (and which therefore are particularly numerous and extend up to the downstream end of the enclosure 7), that is to say permeable to gas 5.
  • the enclosure 7 is rectilinear and extends in the longitudinal direction 6.
  • the opening of 8 and the introduction conduit 10 are oriented so that the liquid 4 flows in the mixing chamber 2 in the longitudinal direction 6.
  • the orifices 14 for introducing the gas are arranged to allow a distribution as uniform as possible of the gas along the inner surface of the enclosure 7, both longitudinally and perpendicularly to the direction longitudinal: here, the entire enclosure 7 is made of a gas permeable material 5 (for example sintered metal).
  • the direction of the gas 5 at their outlet is perpendicular to the longitudinal direction 6.
  • the mixture 3 leaves in pulverized form, without it being necessary for the spraying device 1 to comprise members arranged in the flow of the liquid 4 and the mixture 3 for spraying.
  • the advantages of such a mixing chamber 2 and of such a spraying device 1 are numerous.
  • the liquid 4 and the mixture 3 do not come into contact with the mixing chamber 2, so the liquid 4 (and therefore the mixture 5) may contain particles whose particle size is greater than a few millimeters.
  • the liquid 4 does not undergo a significant pressure drop and can therefore be delivered at a much lower pressure than in conventional sprayers: it can be between 0.1 and 2 bar, and preferably between 0.2 and 1 bar.
  • the gas 5 can be delivered at a much lower pressure than in the conventional sprayers: it can be between 0.1 and 3 bar, and preferably between 0.2 and 1 bar (for a liquid 4 having a viscosity of between 1 and 50 centistokes, and preferably between 15 and 20 centistokes).
  • the ratio of the mass of the gas 5 to the mass of the liquid 4 introduced into the mixing chamber 2 is less than 0.1 (between 0.06 and 0.2, this ratio increasing with the viscosity of the liquid 4 to be sprayed).
  • the outlet pipe is conically shaped and its orientation angle can be between 0 and 90 ° with respect to the longitudinal direction.
  • the number of outlet pipes may be greater than two.
  • the enclosure is not a porous material, but have small pipes, preferably evenly distributed, or is made by an assembly of elements, some of which have spaces that form pipes.
  • the enclosure could thus be formed by a stack of plates (washers) which each comprise grooves that can be made by machining or stamping, the orifices which preferably have a diameter of less than 0.1 mm being made by the meeting of grooves of two adjacent plates.
  • the spraying device can be used for spraying any kind of combustible liquids or not.

Abstract

The chamber (2) has orifices (14) formed in an enclosure (7) for introducing gas (5) and disposed such that the gas forms a film (15) preventing liquid (4) from contacting the enclosure. The gas is mixed with the liquid within a space defined by the film. The liquid is introduced in the chamber, through an inlet opening (8) situated at a longitudinal end, along a stream parallel to a longitudinal direction (6). An independent claim is also included for a spraying method.

Description

La présente invention concerne une chambre permettant le mélange d'un liquide avec un gaz, notamment intégrée à un dispositif permettant la pulvérisation du mélange.The present invention relates to a chamber for mixing a liquid with a gas, in particular integrated in a device for spraying the mixture.

On connaît une chambre de mélange liquide - gaz pour pulvérisateur qui s'étend selon une direction longitudinale, qui est délimitée par une enceinte, et qui comprend une ouverture d'entrée pour l'introduction du liquide située à une première extrémité longitudinale, des orifices pour l'introduction du gaz, et une ouverture de sortie pour l'évacuation du mélange liquide - gaz située à la deuxième extrémité longitudinale.There is known a liquid-gas mixing chamber for sprayer which extends in a longitudinal direction, which is delimited by an enclosure, and which comprises an inlet opening for introducing the liquid located at a first longitudinal end, orifices. for introducing the gas, and an outlet opening for evacuating the liquid-gas mixture located at the second longitudinal end.

Cependant afin d'avoir une pulvérisation efficace du mélange, il est nécessaire d'avoir une énergie mécanique importante. Ainsi, en général, afin de compenser les pertes de charges se produisant dans l'enceinte et les autres dispositifs associés permettant la pulvérisation, le liquide est introduit avec une pression comprise entre 10 et 30 bars, ce qui a un coût. De plus, le liquide (et le mélange) a une vitesse élevé, et, afin d'éviter toute usure rapide de l'enceinte et des autres dispositifs associés, le liquide ne peut pas être chargé avec des particules ayant une granulométrie importante (à partir de 0,25 mm). Par ailleurs, afin d'éviter une séparation précoce du liquide et du gaz, notamment dans le cas où le gaz est de la vapeur d'eau, par condensation sur la surface interne de l'enceinte, le gaz est introduit avec une pression supérieure à 6 bars, ce qui entraîne une forte consommation du gaz (le rapport de la masse du gaz sur la masse du liquide est souvent supérieure à 0,3), ce qui a un coût.However, in order to have an efficient spray of the mixture, it is necessary to have a significant mechanical energy. Thus, in general, in order to compensate for the losses of charges occurring in the enclosure and the other associated devices for spraying, the liquid is introduced with a pressure of between 10 and 30 bar, which has a cost. In addition, the liquid (and the mixture) has a high speed, and in order to avoid rapid wear of the enclosure and other associated devices, the liquid can not be loaded with particles having a large particle size (at from 0.25 mm). Moreover, in order to avoid an early separation of the liquid and the gas, particularly in the case where the gas is water vapor, by condensation on the inner surface of the enclosure, the gas is introduced with a higher pressure at 6 bars, which leads to a high consumption of gas (the ratio of the mass of the gas to the mass of the liquid is often greater than 0.3), which has a cost.

La présente invention vise à réaliser une chambre de mélange pouvant être utilisée notamment dans un dispositif de pulvérisation ne présentant pas les inconvénients précités.The present invention aims to provide a mixing chamber that can be used in particular in a spraying device does not have the aforementioned drawbacks.

Selon l'invention, les orifices d'introduction du gaz sont réalisés dans l'enceinte et sont disposés de sorte que le gaz forme un film empêchant tout contact entre le liquide et l'enceinte et se mélange avec le liquide à l'intérieur de l'espace délimité par le film.According to the invention, the gas introduction orifices are made in the chamber and are arranged so that the gas forms a film preventing any contact between the liquid and the chamber and mixes with the liquid inside the chamber. the space delimited by the film.

Par cette disposition particulière des orifices d'introduction du gaz permettant la formation d'un film gazeux, le mélange liquide - gaz se fait à l'intérieur de cette gaine gazeuse, sans utilisation de composant mécanique supplémentaire, ce qui permet de considérablement réduire les pertes de charge, et de charger le liquide avec des particules relativement importantes (ayant une granulométrie supérieure à plusieurs millimètres). En outre, comme le mélange n'est pas en contact avec l'enceinte, la séparation précoce est considérablement réduite. Par ailleurs, le mélange obtenu dans la chambre de combustion est d'une telle qualité que, dans le cas où il comprend de l'eau (provenant par exemple de la vapeur d'eau comprise dans le gaz), c'est une émulsion.By this particular arrangement of the gas introduction orifices allowing the formation of a gaseous film, the liquid-gas mixture is inside this gaseous sheath, without the use of any additional mechanical component, which makes it possible to considerably reduce the losses, and to charge the liquid with relatively large particles (having a particle size greater than several millimeters). In addition, since the mixture is not in contact with the enclosure, the early separation is considerably reduced. Moreover, the mixture obtained in the combustion chamber is of such a quality that, in the case where it comprises water (from, for example, water vapor contained in the gas), it is an emulsion .

D'autres particularités et avantages apparaîtront dans la description détaillée de deux modes de réalisation particuliers donnés à titre d'exemple non limitatif et illustrés dans les dessins annexés dans lesquels

  • La figure 1 est une vue en coupe schématique d'un premier dispositif de pulvérisation munie d'une chambre de mélange conforme à la présente invention, et
  • La figure 2 est une vu similaire à la figure 1 d'un second dispositif de pulvérisation.
Other particularities and advantages will appear in the detailed description of two particular embodiments given by way of non-limiting example and illustrated in the appended drawings in which:
  • FIG. 1 is a schematic sectional view of a first spraying device provided with a mixing chamber according to the present invention, and
  • Figure 2 is a view similar to Figure 1 of a second spray device.

Un dispositif de pulvérisation 1 comprend une chambre de mélange 2 dans laquelle est réalisée un mélange liquide - gaz 3. Dans les présents mode de réalisation, le dispositif de pulvérisation 1 est intégré à un brûleur, le liquide 4 étant un combustible liquide, et le gaz 5 pouvant être de l'air, du gaz combustible, de la vapeur d'eau ou un mélange d'au moins deux de ces éléments. La chambre de mélange 2 s'étend selon une direction longitudinale 6, et est délimitée par une enceinte 7 qui dans le présent exemple, est de forme cylindrique.A spraying device 1 comprises a mixing chamber 2 in which a liquid-gas mixture 3 is produced. In the present embodiment, the spraying device 1 is integrated in a burner, the liquid 4 being a liquid fuel, and the gas 5 may be air, combustible gas, water vapor or a mixture of at least two of these elements. The mixing chamber 2 extends in a longitudinal direction 6, and is delimited by an enclosure 7 which in the present example is of cylindrical shape.

La chambre de mélange 2 comprend une ouverture d'entrée 8 qui est située à une première extrémité longitudinale et qui permet l'introduction du liquide 4. Dans les présents mode de réalisation, l'alimentation de la chambre de mélange 2 en liquide est réalisée par un organe d'introduction 9 qui est relié à l'ouverture d'entrée 8 par au moins une conduite d'introduction 10 (en l'occurrence par une conduite 10).The mixing chamber 2 comprises an inlet opening 8 which is located at a first longitudinal end and which allows the introduction of the liquid 4. In the present embodiment, the supply of the mixing chamber 2 in liquid is carried out by an introduction member 9 which is connected to the inlet opening 8 by at least one introduction line 10 (in this case by a pipe 10).

La chambre de mélange 2 comprend une ouverture de sortie 11 qui est située à la deuxième extrémité longitudinale et qui permet l'évacuation du mélange liquide - gaz 3. Dans les présents mode de réalisation, un organe d'éjection 12 est relié à l'ouverture de sortie 11 et comprend au moins une conduite de sortie 13 permettant la pulvérisation du mélange à sa sortie. Dans le premier mode de réalisation, l'organe d'éjection 12 ne comprend qu'une conduite de sortie 13 qui est de forme cylindrique et qui est orientée selon la direction longitudinale 6. Dans le second mode de réalisation, l'organe d'éjection 12 comprend deux conduites de sortie 13 qui sont de forme cylindrique, qui sont orientées de sorte que leur axe directeur 16 fasse un angle 17 avec la direction longitudinale 6 et qui sont disposées de façon diamétralement opposées.The mixing chamber 2 comprises an outlet opening 11 which is located at the second longitudinal end and which allows the evacuation of the liquid-gas mixture 3. In the present embodiment, an ejection member 12 is connected to the outlet opening 11 and comprises at least one outlet line 13 for spraying the mixture at its outlet. In the first embodiment, the ejection member 12 comprises only one outlet duct 13 which is cylindrical in shape and which is oriented in the longitudinal direction 6. In the second embodiment, the body of FIG. ejection 12 comprises two outlet ducts 13 which are cylindrical in shape, which are oriented so that their director axis 16 makes an angle 17 with the longitudinal direction 6 and which are arranged diametrically opposite.

La chambre de mélange 2 comprend des orifices 14 qui permettent l'introduction du gaz 5 et qui sont réalisés dans l'enceinte 7 et la traversent. Ces orifices 14 sont disposés de sorte que le gaz 5, d'une part, forme un film 15 empêchant le liquide 4 de circuler contre l'enceinte 7, et, d'autre part, se mélange avec le liquide 4 à l'intérieur de l'espace délimité par le film 15. Ces orifices 14 doivent être suffisamment nombreux pour permettre la réalisation du film 15 qui évite la recondensation du mélange sur les parois de l'enceinte 7. De même, afin de limiter toute recondensation du mélange dans le dispositif 1, comme on peut le voir aux figures, les orifices 14 s'étendent jusqu'à l'extrémité aval de la chambre de mélange 2 et l'organe d'éjection 12 est réduit au mieux (son but étant de servir de support aux conduites de sortie 13 qui définissent l'orientation de la pulvérisation).The mixing chamber 2 comprises orifices 14 which allow the introduction of the gas 5 and which are made in the chamber 7 and pass through. These orifices 14 are arranged so that the gas 5, on the one hand, forms a film 15 preventing the liquid 4 from circulating against the enclosure 7, and, on the other hand, mixes with the liquid 4 inside. the space delimited by the film 15. These orifices 14 must be sufficiently numerous to allow the production of the film 15 which avoids the recondensation of the mixture on the walls of the enclosure 7. Similarly, in order to limit any recondensation of the mixture in the device 1, as can be seen in the figures, the orifices 14 extend to the downstream end of the mixing chamber 2 and the ejection member 12 is reduced at best (its purpose being to serve as support to the outlet conduits 13 which define the orientation of the spray).

Dans les présents modes de réalisation, les orifices 14 d'introduction du gaz sont formés par l'enceinte 7 qui est en un matériau poreux (et qui donc sont particulièrement nombreux et s'étendent jusqu'à l'extrémité aval de l'enceinte 7), c'est-à-dire perméable au gaz 5.In the present embodiments, the gas introduction orifices 14 are formed by the chamber 7 which is made of a porous material (and which therefore are particularly numerous and extend up to the downstream end of the enclosure 7), that is to say permeable to gas 5.

De préférence, afin d'améliorer l'efficacité de la séparation du liquide 4 de l'enceinte 7 par le film 15, l'enceinte 7 est rectiligne et s'étend selon la direction longitudinale 6. De même, l'ouverture d'entrée 8 ainsi que la conduite d'introduction 10 sont orientées de sorte que le liquide 4 circule dans la chambre de mélange 2 selon la direction longitudinale 6. Pour les mêmes raisons, les orifices 14 d'introduction du gaz sont disposés de façon à permettre une répartition la plus uniforme possible du gaz le long de la surface interne de l'enceinte 7, tant longitudinalement que perpendiculairement à la direction longitudinale : ici, l'intégralité de l'enceinte 7 est faite en une matière perméable au gaz 5 (par exemple en métal fritté). En outre, du fait de la nature des orifices 14, la direction du gaz 5 à leur sortie est perpendiculaire à la direction longitudinale 6.Preferably, in order to improve the efficiency of the separation of the liquid 4 from the enclosure 7 by the film 15, the enclosure 7 is rectilinear and extends in the longitudinal direction 6. Likewise, the opening of 8 and the introduction conduit 10 are oriented so that the liquid 4 flows in the mixing chamber 2 in the longitudinal direction 6. For the same reasons, the orifices 14 for introducing the gas are arranged to allow a distribution as uniform as possible of the gas along the inner surface of the enclosure 7, both longitudinally and perpendicularly to the direction longitudinal: here, the entire enclosure 7 is made of a gas permeable material 5 (for example sintered metal). In addition, because of the nature of the orifices 14, the direction of the gas 5 at their outlet is perpendicular to the longitudinal direction 6.

De plus, en sortie de la (des) conduite(s) de sortie 13, le mélange 3 sort sous forme pulvérisée, sans qu'il soit nécessaire que le dispositif de pulvérisation 1 comprenne des organes disposés dans le flux du liquide 4 et du mélange 3 pour réaliser la pulvérisation.In addition, at the outlet of the outlet line (s) 13, the mixture 3 leaves in pulverized form, without it being necessary for the spraying device 1 to comprise members arranged in the flow of the liquid 4 and the mixture 3 for spraying.

Ainsi, les avantages d'une telle chambre de mélange 2 et d'un tel dispositif de pulvérisation 1 sont nombreux. Le liquide 4 et le mélange 3 ne viennent pas contact avec la chambre de mélange 2, de ce fait le liquide 4 (et donc le mélange 5) peut contenir des particules dont la granulométrie est supérieure à quelques millimètres. De ce fait également, le liquide 4 ne subit pas de perte de charge importante et il peut donc être délivré à une pression bien plus faible que dans les pulvérisateurs classique : elle peut être comprise entre 0,1 et 2 bar, et, de préférence, entre 0,2 et 1 bar. Par ailleurs, toujours pour la même raison, une fois le mélange 3 réalisé, la séparation précoce du liquide 4 et du gaz 5 est limitée, et, de ce fait, le gaz 5 peut être délivré à une pression bien plus faible que dans les pulvérisateurs classique : elle peut être comprise entre 0,1 et 3 bar, et, de préférence, entre 0,2 et 1 bar (pour un liquide 4 ayant une viscosité comprise entre 1 et 50 centistokes, et de préférence, entre 15 et 20 centistokes). Une conséquence de cet avantage est la faible consommation en gaz 5 : le rapport de la masse du gaz 5 à sur la masse du liquide 4 introduits dans la chambre de mélange 2 est inférieure à 0,1 (comprise entre 0,06 et 0,2, ce rapport augmentant avec la viscosité du liquide 4 à pulvériser).Thus, the advantages of such a mixing chamber 2 and of such a spraying device 1 are numerous. The liquid 4 and the mixture 3 do not come into contact with the mixing chamber 2, so the liquid 4 (and therefore the mixture 5) may contain particles whose particle size is greater than a few millimeters. Also, the liquid 4 does not undergo a significant pressure drop and can therefore be delivered at a much lower pressure than in conventional sprayers: it can be between 0.1 and 2 bar, and preferably between 0.2 and 1 bar. On the other hand, again for the same reason, once the mixture 3 has been completed, the early separation of the liquid 4 and the gas 5 is limited, and, as a result, the gas 5 can be delivered at a much lower pressure than in the conventional sprayers: it can be between 0.1 and 3 bar, and preferably between 0.2 and 1 bar (for a liquid 4 having a viscosity of between 1 and 50 centistokes, and preferably between 15 and 20 centistokes). One consequence of this advantage is the low consumption of gas 5: the ratio of the mass of the gas 5 to the mass of the liquid 4 introduced into the mixing chamber 2 is less than 0.1 (between 0.06 and 0.2, this ratio increasing with the viscosity of the liquid 4 to be sprayed).

La présente invention n'est pas limitée aux modes de réalisation décrits. Il serait ainsi possible que la conduite de sortie soit de forme conique et son angle d'orientation peut être compris entre 0 et 90° par rapport à la direction longitudinale. De plus, le nombre de conduites de sortie peut être supérieur à deux. Il serait aussi possible que l'enceinte ne soit pas en matière poreuse, mais présentent des petites canalisations, de préférence régulièrement réparties, ou soit réalisée par un assemblage d'éléments dont certains d'entre eux présentent des espaces qui forment des canalisations. L'enceinte pourrait ainsi être formée par un empilage de plaques (de rondelles) qui comportent chacune des rainures pouvant être réalisées par usinage ou par emboutissage, les orifices qui de préférence ont un diamètre inférieur à 0,1 mm étant réalisés par la réunion des rainures de deux plaques adjacentes. De plus, le dispositif de pulvérisation peut être utilisé pour la pulvérisation de tout types de liquides combustibles ou non.The present invention is not limited to the described embodiments. It is thus possible that the outlet pipe is conically shaped and its orientation angle can be between 0 and 90 ° with respect to the longitudinal direction. In addition, the number of outlet pipes may be greater than two. It is also possible that the enclosure is not a porous material, but have small pipes, preferably evenly distributed, or is made by an assembly of elements, some of which have spaces that form pipes. The enclosure could thus be formed by a stack of plates (washers) which each comprise grooves that can be made by machining or stamping, the orifices which preferably have a diameter of less than 0.1 mm being made by the meeting of grooves of two adjacent plates. In addition, the spraying device can be used for spraying any kind of combustible liquids or not.

Claims (11)

Chambre de mélange (2) s'étendant selon une direction longitudinale (6), délimitée par une enceinte (7), comprenant une ouverture d'entrée (8) pour l'introduction d'un liquide (4) située à une première extrémité longitudinale, des orifices (14) pour l'introduction d'un gaz (5), et une ouverture de sortie (11) pour l'évacuation du mélange liquide - gaz (3) située à la deuxième extrémité longitudinale, caractérisée en ce que les orifices (14) sont réalisés dans l'enceinte (7) et sont disposés de sorte que le gaz (5) forme un film (15) empêchant le liquide (4) d'entrer en contact avec l'enceinte (7) et se mélange avec le liquide (4) à l'intérieur de l'espace délimité par le film (15).Mixing chamber (2) extending in a longitudinal direction (6), delimited by an enclosure (7), comprising an inlet opening (8) for the introduction of a liquid (4) at a first end longitudinal, orifices (14) for the introduction of a gas (5), and an outlet opening (11) for the evacuation of the liquid-gas mixture (3) located at the second longitudinal end, characterized in that the orifices (14) are formed in the enclosure (7) and are arranged so that the gas (5) forms a film (15) preventing the liquid (4) from coming into contact with the enclosure (7) and mixes with the liquid (4) within the space defined by the film (15). Chambre de mélange (2) selon la revendication 1, caractérisée en ce que le liquide (4) est introduit dans la chambre (2) selon un flux parallèle à la direction longitudinale (6).Mixing chamber (2) according to claim 1, characterized in that the liquid (4) is introduced into the chamber (2) in a flow parallel to the longitudinal direction (6). Chambre de mélange (2) selon la revendication 1 ou 2, caractérisée en ce que les orifices (14) sont disposés de façon à permettre une répartition uniforme du gaz (5) le long de la surface interne de l'enceinte (7).Mixing chamber (2) according to claim 1 or 2, characterized in that the orifices (14) are arranged to allow a uniform distribution of the gas (5) along the inner surface of the chamber (7). Chambre de mélange (2) selon l'une des revendications 1 à 3, caractérisée en ce que les orifices (14) sont orientés de sorte que la direction du gaz (5) à leur sortie est perpendiculaire à la direction longitudinale (6).Mixing chamber (2) according to one of claims 1 to 3, characterized in that the orifices (14) are oriented so that the direction of the gas (5) at their outlet is perpendicular to the longitudinal direction (6). Chambre de mélange (2) selon l'une des revendications 1 à 4, caractérisée en ce que les orifices (14) sont formés par l'enceinte (7) qui est réalisée en un matériau perméable au gaz (5), par exemple en métal fritté.Mixing chamber (2) according to one of Claims 1 to 4, characterized in that the orifices (14) are formed by the chamber (7) which is made of a material permeable to gas (5), for example sintered metal. Chambre de mélange (2) selon l'une des revendications 1 à 5, caractérisée en ce que l'enceinte (7) est formée par un empilage de plaques qui comportent chacune des rainures, les orifices (14) étant réalisés par la réunion des rainures de deux plaques adjacentes.Mixing chamber (2) according to one of claims 1 to 5, characterized in that the enclosure (7) is formed by a stack of plates each having grooves, the orifices (14) being formed by the meeting of grooves of two adjacent plates. Dispositif de pulvérisation (1) caractérisé en ce qu'il comprend une chambre de mélange (2) conforme à l'une des revendications 1 à 6 et un organe d'éjection (12) relié à l'ouverture de sortie (11) de la chambre de mélange (2) et comprenant au moins une conduite de sortie (13) à la sortie de laquelle le mélange (5) se présente sous forme pulvérisé.Spraying device (1) characterized in that it comprises a mixing chamber (2) according to one of claims 1 to 6 and an ejection member (12) connected to the outlet opening (11) of the mixing chamber (2) and comprising at least one outlet pipe (13) at the outlet of which the mixture (5) is in pulverized form. Dispositif de pulvérisation (1) selon la revendication 7, caractérisé en ce que la conduite de sortie (13) est de forme cylindrique ou conique.Spray device (1) according to claim 7, characterized in that the outlet pipe (13) is cylindrical or conical. Procédé de pulvérisation, caractérisé en ce que le liquide (4) introduit dans la chambre de mélange (2) conforme à l'une des revendications 1 à 6 est délivré à une pression comprise entre 0,1 et 2 bar, et, de préférence, entre 0,2 et 1 bar.Spraying process, characterized in that the liquid (4) introduced into the mixing chamber (2) according to one of claims 1 to 6 is delivered at a pressure of between 0.1 and 2 bar, and preferably between 0.2 and 1 bar. Procédé de pulvérisation, caractérisé en ce que le gaz (5) introduit dans la chambre de mélange (2) conforme à l'une des revendications 1 à 6 est délivré à une pression comprise entre 0,1 et 3 bar, et, de préférence, entre 0,2 et 1 bar.Spraying process, characterized in that the gas (5) introduced into the mixing chamber (2) according to one of claims 1 to 6 is delivered at a pressure of between 0.1 and 3 bar, and preferably between 0.2 and 1 bar. Procédé de pulvérisation, caractérisé en ce que le rapport de la masse du gaz (5) à sur la masse du liquide (4) introduits dans la chambre de mélange (2) conforme à l'une des revendications 1 à 6 est comprise entre 0,06 et 0,2.Spraying process, characterized in that the ratio of the mass of the gas (5) to the mass of the liquid (4) introduced into the mixing chamber (2) according to one of claims 1 to 6 is between 0 , 06 and 0.2.
EP20060291903 2005-12-15 2006-12-11 Mixing chamber and spraying device comprising said chamber Not-in-force EP1797963B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0512765A FR2894854B1 (en) 2005-12-15 2005-12-15 MIXING CHAMBER AND SPRAY DEVICE COMPRISING SUCH A ROOM

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EP1797963A1 true EP1797963A1 (en) 2007-06-20
EP1797963B1 EP1797963B1 (en) 2010-05-19

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DE (1) DE602006014351D1 (en)
ES (1) ES2344220T3 (en)
FR (1) FR2894854B1 (en)

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EP2314921A2 (en) 2009-10-21 2011-04-27 Fives Pillard Method of operating a boiler
CN104646205A (en) * 2013-11-19 2015-05-27 重庆大学 Low-pressure self-inspiration boosting nozzle

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CN107469608A (en) * 2017-09-11 2017-12-15 苏州中材建设有限公司 Reducing agent sprayer unit for denitrating flue gas

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DE4128670A1 (en) * 1991-08-29 1993-03-04 Ike Inst Fuer Kerntechnik Und Method for fluid atomisation - has parallel courses for working fluid and atomisation fluids, at constant speed, until atomisation
WO1998001231A1 (en) * 1996-07-08 1998-01-15 Nauchno-Issledovatelsky Institut Nizkikh Temperatur Pri Mai (Moskovskom Gosudarstvennom Aviatsionnom Institute-Tekhnicheskom Universitete) Method for producing a gas-droplet jet stream, equipment and nozzle therefor
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EP2314921A2 (en) 2009-10-21 2011-04-27 Fives Pillard Method of operating a boiler
CN104646205A (en) * 2013-11-19 2015-05-27 重庆大学 Low-pressure self-inspiration boosting nozzle

Also Published As

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FR2894854B1 (en) 2008-02-22
ES2344220T3 (en) 2010-08-20
EP1797963B1 (en) 2010-05-19
FR2894854A1 (en) 2007-06-22
DE602006014351D1 (en) 2010-07-01

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