EP1380348B1 - Appareil de pulvérisation et procédé pour créer un mélange liquide-gaz - Google Patents

Appareil de pulvérisation et procédé pour créer un mélange liquide-gaz Download PDF

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Publication number
EP1380348B1
EP1380348B1 EP03405488A EP03405488A EP1380348B1 EP 1380348 B1 EP1380348 B1 EP 1380348B1 EP 03405488 A EP03405488 A EP 03405488A EP 03405488 A EP03405488 A EP 03405488A EP 1380348 B1 EP1380348 B1 EP 1380348B1
Authority
EP
European Patent Office
Prior art keywords
liquid
nozzle
air
water
nozzle chamber
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.)
Expired - Lifetime
Application number
EP03405488A
Other languages
German (de)
English (en)
Other versions
EP1380348A2 (fr
EP1380348A3 (fr
Inventor
Peter Jansohn
Alexander Ni
Sasha Savic
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP1380348A2 publication Critical patent/EP1380348A2/fr
Publication of EP1380348A3 publication Critical patent/EP1380348A3/fr
Application granted granted Critical
Publication of EP1380348B1 publication Critical patent/EP1380348B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/065—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet an inner gas outlet being surrounded by an annular adjacent liquid outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
    • F04F5/08—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids the elastic fluid being entrained in a free falling column of liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/42—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow characterised by the input flow of inducing fluid medium being radial or tangential to output flow

Definitions

  • the invention relates to a device for generating a liquid-gas mixture according to the preamble of the first claim.
  • the invention is also based on a method for producing a liquid-gas mixture according to the preamble of the independent method claim.
  • a sputtering device for generating a liquid-gas mixture is known, which is used in an isothermal compression method.
  • the isothermally compressed gas preferably air
  • An atomizing device consists of a plurality of concentric annular nozzles, which are interconnected via connecting channels. Air is supplied to the water emerging from the ring nozzles through the openings formed between the ring nozzles.
  • the atomizing nozzle covers the entire opening of a Laval nozzle to form over the entire opening a homogeneous spray, consisting of individual liquid droplets.
  • Another atomizing nozzle also consists of a plurality of concentrically arranged annular nozzles, which are interconnected via connecting channels and covers the opening of the Laval nozzle. The addition of water and air is adjusted here, however, to form a foamy mixture in which air bubbles are trapped by liquid.
  • the invention has for its object to increase the efficiency of the atomization in a nebulizer of the type mentioned.
  • the atomizing device consists of a nozzle body, which comprises an at least approximately central tube for the gaseous medium and a nozzle chamber enclosing this central tube for supplying liquid, wherein the liquid for generating a twisted liquid flow tangentially into the nozzle chamber enters and the twisted liquid flow coaxially exiting the gaseous medium enclosing through a nozzle opening from the nozzle body.
  • a swirling hollow cone-shaped spray spreading in the direction of flow is thus produced by means arranged on or in the atomizing device for producing a twisted liquid flow.
  • gaseous medium is fed via the central tube.
  • the advantages of the invention can be seen, inter alia, in that the liquid emerging from the atomizing device in a swirling flow forms a central vacuum zone into which a larger quantity of gas flows than in previously known atomizing nozzles.
  • the atomization quality is increased by the improved atomization due to the hollow-cone spray and the smaller thickness of the liquid film emerging from the annular nozzle orifice.
  • the improved atomization in turn means that the length of the downstream Laval nozzle can be reduced, since a shorter mixing time is required for the production of a bubbly mixture.
  • Fig. 1 Isothermal compression is used for precompression in a gas turbine plant shown schematically.
  • the mixing tube 3 is formed as a vertically arranged chute, through which the liquid-air mixture 4 flows vertically downward, accelerated by gravity.
  • the liquid droplets are deprived of kinetic energy, whereby the air contained in the liquid-air mixture 4 is compressed.
  • the diffuser 3a is connected downstream to a high-pressure chamber 5, in which the highly compressed air separates from the liquid in an air-water separator 12.
  • a high-pressure feed line 6 Via a corresponding high-pressure feed line 6, the isothermally pre-compressed air is fed to a further compressor stage 7, which is subsequently connected to a combustion chamber 8, in which the pre-compressed air is ignited mixed with fuel.
  • the expanding in the combustion chamber hot gases drive the turbine 9, which in turn is connected to a generator 10 for generating electricity.
  • the separated water is fed back to the atomizing device 2 by means of the pump 1 and the water pipe 11. For cooling the supplied water, this can be cooled by means of a water cooler 11 arranged in the water cooler 14.
  • the length of the mixing tube 3 required for the compression does not depend on the power of the gas turbine, but rather strongly on the atomization quality with which the atomizing device 2 atomises the liquid into very finely distributed liquid droplets. Likewise, the length depends on the nozzle efficiency and the pressure ratio at which the liquid to be atomized is fed to the atomizing device 2. Thus, the length of the mixing tube 3 decreases with decreasing droplet diameter or decreasing compression efficiency. Typical nozzle lengths with moderate atomization quality are about 20 m, whereas nozzle lengths with high atomization quality can be shortened to 6 to 10 m. When using a gas turbine with an air mass flow rate of approx.
  • Fig. 2 is the sputtering device 2 in longitudinal section and in the Fig. 3 shown in cross section.
  • a nozzle body 20 the water 15 is passed to the annular, the air supply line 16 surrounding nozzle chamber 18 via tangentially to the central air supply 16 extending water supply lines 17.
  • the nozzle chamber 18 tapers toward the annular nozzle opening 19.
  • water 15 is conveyed to the nozzle chamber 18 by means of the pump 1.
  • a twisted flow is formed which is accelerated in the tapered cross-section to the nozzle outlet opening 19 out.
  • a hollow cone-shaped swirling spray 21 is formed, which forms a vacuum zone 22 in the region enclosed by it.
  • air 13 is sucked in via the air supply and entrained.
  • the amount of entrained through the pressure zone air is much higher than in previously known atomizing devices.
  • the spray 21 is directly at the nozzle exit 19 still a liquid film, which is exposed to strong surface tension forces, which lead to instabilities due to the large specific surface area.
  • the well-atomized spray 21 mixes with the entrained air 13 and forms a biphasic mixture 4 of air and liquid.
  • the mixing process takes a certain length and the efficiency of the mixing is inversely proportional to the droplet size, i. the smaller the drops, the higher the effectiveness.
  • the mixing results in a bubbly mixture in which the air is trapped in liquid droplets, which in turn leads to isothermal compression of the air. Due to the high amount of entrained air, the high atomization quality and the short mixing time to produce the blistery mixture, the height of the Laval nozzle can be greatly reduced.
  • the invention is not limited to the embodiment shown and described.
  • To generate the swirl flow in the nozzle chamber only one tangential water feed or more than two tangential water feeds can be used.
  • the design of the tangential water supply with respect to their position and their inner dimensions is carried out according to the desired outer angle of the spray, the desired amount of entrained air, the available water pressure and the flow rate of the water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Claims (1)

  1. Appareil de pulvérisation pour produire un mélange liquide-gaz (4) à partir d'un milieu liquide (15) et d'un milieu gazeux (13), dans lequel le mélange produit (4) est introduit, pour comprimer de manière isotherme le milieu gazeux (13), dans un agencement de buse (3) dans lequel l'énergie cinétique du mélange (4) est convertie pour la majeure partie en énergie de compression du milieu gazeux,
    caractérisé en ce que
    l'appareil de pulvérisation (2) se compose d'un corps de buse (20) qui comprend un tube (16) au moins approximativement central pour le milieu gazeux (13) et une chambre de buse (18) pour le milieu liquide (15) à symétrie de révolution et entourant ce tube (16), une alimentation en liquide (17) pour produire un écoulement de liquide tourbillonnaire débouchant tangentiellement dans la chambre de buse (18), la chambre de buse (18) se rétrécissant jusqu'à une ouverture de buse annulaire (19), et le milieu fluide (15) sortant hors du corps de buse (20) dans l'ouverture de buse (19) entourant coaxialement le tube (16).
EP03405488A 2002-07-11 2003-07-02 Appareil de pulvérisation et procédé pour créer un mélange liquide-gaz Expired - Lifetime EP1380348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10231218A DE10231218A1 (de) 2002-07-11 2002-07-11 Zerstäubungseinrichtung und Verfahren zur Erzeugung eines Flüssigkeit-Gas Gemisches
DE10231218 2002-07-11

Publications (3)

Publication Number Publication Date
EP1380348A2 EP1380348A2 (fr) 2004-01-14
EP1380348A3 EP1380348A3 (fr) 2004-12-29
EP1380348B1 true EP1380348B1 (fr) 2009-08-26

Family

ID=29723831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405488A Expired - Lifetime EP1380348B1 (fr) 2002-07-11 2003-07-02 Appareil de pulvérisation et procédé pour créer un mélange liquide-gaz

Country Status (4)

Country Link
US (1) US6986473B2 (fr)
EP (1) EP1380348B1 (fr)
AT (1) ATE440671T1 (fr)
DE (2) DE10231218A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7182279B2 (en) * 2004-10-28 2007-02-27 National Cheng Kung University Atomizer for atomizing molten metal
WO2008097565A1 (fr) * 2007-02-05 2008-08-14 Process Engineering And Manufacturing Épurateur multi-cible
US7628606B1 (en) * 2008-05-19 2009-12-08 Browning James A Method and apparatus for combusting fuel employing vortex stabilization
DE102008025325A1 (de) * 2008-05-27 2009-04-16 VOGT AG Feuerwehrgeräte- und Fahrzeugbau Strahlpumpenverdichter zum Erzeugen von Druckluftschaum CAFS-(Compressed Air Foam System)
CN104838151B (zh) * 2013-08-05 2017-12-12 松下知识产权经营株式会社 喷射器和使用了该喷射器的热泵装置
CN104923505A (zh) * 2014-12-12 2015-09-23 天津市通洁高压泵制造有限公司 一种真空式高压水喷射装置
CN104923506A (zh) * 2015-01-09 2015-09-23 天津市通洁高压泵制造有限公司 一种高压清洗回收一体清洗车
CN110672937B (zh) * 2019-09-18 2021-08-03 北京农业智能装备技术研究中心 一种电动雾化器的雾化效率评价方法及装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR904557A (fr) * 1944-05-24 1945-11-09 Robinetterie S A J Soc D Atomiseur
US3533558A (en) * 1967-05-17 1970-10-13 Niro Atomizer As Liquid atomizer nozzle
US3684186A (en) * 1970-06-26 1972-08-15 Ex Cell O Corp Aerating fuel nozzle
US3980233A (en) * 1974-10-07 1976-09-14 Parker-Hannifin Corporation Air-atomizing fuel nozzle
US4179068A (en) * 1975-07-24 1979-12-18 National Research Development Corporation Liquid spray devices
JPS5926348B2 (ja) * 1976-12-03 1984-06-26 三菱プレシジヨン株式会社 流体の微粒化分散装置
US4343434A (en) * 1980-04-28 1982-08-10 Spraying Systems Company Air efficient atomizing spray nozzle
US4754922A (en) * 1986-07-24 1988-07-05 Ex-Cell-O Corporation Airblast fuel injector tip with integral cantilever spring fuel metering valve and method for reducing vapor lock from high temperature
US5044559A (en) * 1988-11-02 1991-09-03 United Technologies Corporation Gas assisted liquid atomizer
DE19730617A1 (de) 1997-07-17 1999-01-21 Abb Research Ltd Druckzerstäuberdüse
DE59810850D1 (de) 1998-09-30 2004-04-01 Alstom Technology Ltd Baden Verfahren zur isothermen Kompression von Luft sowie Düsenanordnung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
EP1380348A2 (fr) 2004-01-14
DE50311841D1 (de) 2009-10-08
ATE440671T1 (de) 2009-09-15
DE10231218A1 (de) 2004-01-29
US6986473B2 (en) 2006-01-17
EP1380348A3 (fr) 2004-12-29
US20040060996A1 (en) 2004-04-01

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