EP1797963A1 - Mischkammer und Sprühvorrichtung mit einer ähnlichen Mischkammer - Google Patents

Mischkammer und Sprühvorrichtung mit einer ähnlichen Mischkammer 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
Authority
EP
European Patent Office
Prior art keywords
gas
liquid
mixing chamber
chamber
orifices
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.)
Granted
Application number
EP06291903A
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English (en)
French (fr)
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EP1797963B1 (de
Inventor
Frédéric Bury
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1797963A1 publication Critical patent/EP1797963A1/de
Application granted granted Critical
Publication of EP1797963B1 publication Critical patent/EP1797963B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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.

Landscapes

  • Nozzles (AREA)
EP20060291903 2005-12-15 2006-12-11 Mischkammer und Sprühvorrichtung mit einer ähnlichen Mischkammer Not-in-force EP1797963B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0512765A FR2894854B1 (fr) 2005-12-15 2005-12-15 Chambre de melange et dispositif de pulverisation comportant une telle chambre

Publications (2)

Publication Number Publication Date
EP1797963A1 true EP1797963A1 (de) 2007-06-20
EP1797963B1 EP1797963B1 (de) 2010-05-19

Family

ID=36942182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060291903 Not-in-force EP1797963B1 (de) 2005-12-15 2006-12-11 Mischkammer und Sprühvorrichtung mit einer ähnlichen Mischkammer

Country Status (4)

Country Link
EP (1) EP1797963B1 (de)
DE (1) DE602006014351D1 (de)
ES (1) ES2344220T3 (de)
FR (1) FR2894854B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314921A2 (de) 2009-10-21 2011-04-27 Fives Pillard Verfahren zum Betrieb eines Heizkessels
CN104646205A (zh) * 2013-11-19 2015-05-27 重庆大学 低压自吸气增压喷嘴

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107469608A (zh) * 2017-09-11 2017-12-15 苏州中材建设有限公司 用于烟气脱硝的还原剂喷雾装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128670A1 (de) * 1991-08-29 1993-03-04 Ike Inst Fuer Kerntechnik Und Verfahren und vorrichtung zum zerstaeuben einer fluessigkeit
WO1998001231A1 (fr) * 1996-07-08 1998-01-15 Nauchno-Issledovatelsky Institut Nizkikh Temperatur Pri Mai (Moskovskom Gosudarstvennom Aviatsionnom Institute-Tekhnicheskom Universitete) Procede de formation de jet de type gaz-gouttelettes, installation et buse
FR2766108A1 (fr) * 1997-07-17 1999-01-22 France Etat Dispositif de generation d'un fluide diphasique
US20040111915A1 (en) 2001-04-13 2004-06-17 Gianfranco Bedetti Fluid bed granulation apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128670A1 (de) * 1991-08-29 1993-03-04 Ike Inst Fuer Kerntechnik Und Verfahren und vorrichtung zum zerstaeuben einer fluessigkeit
WO1998001231A1 (fr) * 1996-07-08 1998-01-15 Nauchno-Issledovatelsky Institut Nizkikh Temperatur Pri Mai (Moskovskom Gosudarstvennom Aviatsionnom Institute-Tekhnicheskom Universitete) Procede de formation de jet de type gaz-gouttelettes, installation et buse
FR2766108A1 (fr) * 1997-07-17 1999-01-22 France Etat Dispositif de generation d'un fluide diphasique
US20040111915A1 (en) 2001-04-13 2004-06-17 Gianfranco Bedetti Fluid bed granulation apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314921A2 (de) 2009-10-21 2011-04-27 Fives Pillard Verfahren zum Betrieb eines Heizkessels
CN104646205A (zh) * 2013-11-19 2015-05-27 重庆大学 低压自吸气增压喷嘴

Also Published As

Publication number Publication date
FR2894854B1 (fr) 2008-02-22
ES2344220T3 (es) 2010-08-20
EP1797963B1 (de) 2010-05-19
DE602006014351D1 (de) 2010-07-01
FR2894854A1 (fr) 2007-06-22

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