EP0394629A2 - Dispositif de pulvérisation de fluide ou pour mettre un gaz sous forme de petites bulles - Google Patents

Dispositif de pulvérisation de fluide ou pour mettre un gaz sous forme de petites bulles Download PDF

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Publication number
EP0394629A2
EP0394629A2 EP90103005A EP90103005A EP0394629A2 EP 0394629 A2 EP0394629 A2 EP 0394629A2 EP 90103005 A EP90103005 A EP 90103005A EP 90103005 A EP90103005 A EP 90103005A EP 0394629 A2 EP0394629 A2 EP 0394629A2
Authority
EP
European Patent Office
Prior art keywords
gas
section
liquid
outflow cross
mixing 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.)
Withdrawn
Application number
EP90103005A
Other languages
German (de)
English (en)
Other versions
EP0394629A3 (fr
Inventor
Jogindar Mohan Prof. Dr.-Ing. Chawla
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.)
Caldyn Apparatebau GmbH
Original Assignee
Caldyn Apparatebau GmbH
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 Caldyn Apparatebau GmbH filed Critical Caldyn Apparatebau GmbH
Publication of EP0394629A2 publication Critical patent/EP0394629A2/fr
Publication of EP0394629A3 publication Critical patent/EP0394629A3/fr
Withdrawn legal-status Critical Current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
    • B05B7/04—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/78—Sonic flow

Definitions

  • the invention relates to a device for atomizing liquid using gas or for dividing gas into small bubbles using liquid, the gas and the liquid being combined and mixed in a mixing chamber to form a two-phase mixture, and wherein the Inflow velocities and the volume flows of the individual phases, taking into account the state variables of the resulting two-phase mixture with regard to the outflow cross section of the mixing chamber, are selected such that the outflow speed of the two-phase mixture is approximately equal to the characteristic sound velocity of the two-phase mixture and the two-phase mixture leaves the mixing chamber with a sudden drop in pressure.
  • Such a mixing device is known from DE-PS 26 27 880. It is characterized by an effective atomization of liquids or the division of gases into many small bubbles with low energy consumption. In the following, we will only speak of the atomization of liquids, but the invention is equally suitable for the separation of gases.
  • the object of the present invention is to improve the atomization device described at the outset in such a way that, with a low liquid throughput, relatively little propellant gas and, accordingly, less energy consumption can be used.
  • the atomization device according to the invention should therefore be equally economically suitable for full-load as well as for partial-load operation.
  • This object is achieved according to the invention in that the size of the discharge cross-section is adjustable behind the mixing chamber.
  • the invention is therefore based on the knowledge that the amount of liquid can be reduced externally via a valve or the like, but that, on the other hand, to reduce the amount of gas, it is necessary to reduce the outlet cross-section of the nozzle and that this reduction of the geometric relationships still ensures compliance the characteristic speed of sound of the mixture in the reduced outlet cross section.
  • the size of the outflow cross section can be adjusted not only when the system is at a standstill, but continuously during operation.
  • the nozzle can thus be adapted to the current conditions without any interruptions in operation.
  • This adjustment is advantageously carried out automatically by a control loop depending on the gas or liquid throughput.
  • the gas or liquid pressure itself can be used to bring about the adjustment of the outflow cross section.
  • the skilled person has various options for constructing the adjustment principle. It is expedient for the adjustment to be carried out by an insert which can be pushed into the outflow cross section from the side of the mixing chamber, the insert being hollow so that it itself functions as an additional mixing chamber.
  • the insert can be connected to a control piston, which in turn is acted upon by the gas or liquid pressure, while on the other hand it is loaded by a spring.
  • the pressurization of the control piston can be controlled by valves, possibly also reducing valves.
  • outflow cross section is adjustable by perforated disks, throttles or orifices.
  • outflow cross section is at least partially formed by radially adjustable peripheral surfaces.
  • the radial adjustment can also be generated on the basis of an axial displacement movement.
  • outflow cross section can also be formed by radially elastic peripheral surfaces, for example a rubber-like ring membrane.
  • the cross-sectional adjustment does not always have to be made by the pressure of the gas or liquid flow, but instead an external actuation is also possible, be it by mechanical, hydraulic or pneumatic drives.
  • Figures 1 and 2 show nozzles, which are constructed as follows:
  • a cylindrical housing 1 has at one end a nozzle opening 2 with a diameter D 1. This opening widens axially inwards into a mixing chamber 3, into which the one medium, in the exemplary embodiment compressed air, can be supplied via a connection 4.
  • the mixing chamber 3 is surrounded by a cylindrical perforated plate 5, which is arranged at a radial distance from the cylindrical housing 1.
  • the right end of the mixing chamber 3 is formed by a transverse wall 6 which has a central opening in which a cylindrical insert 7 is guided so as to be axially displaceable.
  • This insert has an outlet nozzle 8 at its left end, which projects into the mixing chamber 3.
  • Your outlet opening with the diameter D2 is smaller than the outlet opening 2, whereas the outer diameter of the nozzle 8 has approximately the diameter D1.
  • the insert 7 widens to a second mixing chamber 9.
  • a rod-shaped extension 10 with a control piston 11 connects to this mixing chamber 9 to the right.
  • the rod 10 passes through an annular disk 12 fixed in the housing 1, which at the same time represents the right boundary of an annular space 13 formed between the annular chamber 9 and the housing 1.
  • the other medium in the exemplary embodiment water, is fed into this annular space 13 via a connection 14.
  • the washer 12 serves to support a compression spring 15, which strives to move the insert 7 into the position shown. This position is intended for full load operation of the nozzle.
  • Connections 4 and 14 supply compressed air or water. In the drawn position of the insert 7, the two phases are only mixed in the mixing space 3. The inflow speeds and volume flows are selected so that the outflow speed of the two-phase mixture at the outlet cross section 2 is equal to the characteristic sound speed of the mixture.
  • the insert 7 is shifted to the left against the spring force acting on it until the nozzle 8 has completely crossed the mixing chamber 3 and fills the outlet cross section 2, expediently flush with it at the front.
  • the mixing chamber 3 is then replaced through the mixing chamber 9 and the outlet cross section is reduced to the diameter D2.
  • the insert 7 is adjusted pneumatically by the compressed air itself.
  • the cylinder space 16 formed between the control piston 11 and the housing 1 is connected to the compressed air source via a connection 17 and a solenoid valve 18. If the solenoid valve 18 is opened, the pressure from the compressed air network causes the nozzle to be switched over to partial load operation as described above.
  • the valve 18 is closed and the cylinder space 16 is either connected to the atmosphere or, if the pressure medium is not a gas to be released into the atmosphere, but rather, for example, helium or hydrogen the gas located in the cylinder space 16 is returned to the gas cycle. In the exemplary embodiment, this takes place via an additional line with a solenoid valve 19, which opens into the gas supply line behind a pressure reducer 20.
  • Figure 2 shows the combination of several nozzles using common feed channels for the components to be mixed and the control medium.
  • two nozzles 21 and 22 are connected to the compressed air network via an outer, annular line 23, to the liquid source via an inner ring line 24 and to the control medium via a central line 26.
  • Figure 3 shows the principle of another nozzle design.
  • the conventional mixing chamber is used, which is why it is not shown in the drawing.
  • the outlet cross section here is not formed by a rigid bore, but by an elastic rubber ring 30.
  • This rubber ring has a conically stepped profile towards the mixing chamber, while it defines an outlet cross section 31 to the outside, forming a sharp edge. From there, the rubber ring 30 runs radially outward, so that an open hollow profile is formed.
  • the flank 30 a of this hollow profile facing the mixing chamber is fixed on the nozzle housing 32, whereas the opposite outer flank 30 b is movable especially in the radial direction.
  • An elastic hose ring 33 is located in the interior of the hollow profile. By appropriately pressurizing this hose ring, the rubber ring defining the outflow opening 31 is more or less constricted. When pressure is released, it stretches back to the starting position due to its own elasticity.
  • the atomizing or dividing device shown in the drawing is only used to illustrate the principle. Depending on the structural and procedural requirements, the atomizing nozzle can also be designed and constructed differently. In particular, it is possible to add divergent pipe sections at the end of the mixing chamber.

Landscapes

  • Nozzles (AREA)
EP19900103005 1989-04-22 1990-02-16 Dispositif de pulvérisation de fluide ou pour mettre un gaz sous forme de petites bulles Withdrawn EP0394629A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913334A DE3913334A1 (de) 1989-04-22 1989-04-22 Vorrichtung fuer die zerstaeubung von fluessigkeit oder fuer die zerteilung von gas in kleine blasen
DE3913334 1989-04-22

Publications (2)

Publication Number Publication Date
EP0394629A2 true EP0394629A2 (fr) 1990-10-31
EP0394629A3 EP0394629A3 (fr) 1991-08-14

Family

ID=6379263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900103005 Withdrawn EP0394629A3 (fr) 1989-04-22 1990-02-16 Dispositif de pulvérisation de fluide ou pour mettre un gaz sous forme de petites bulles

Country Status (4)

Country Link
US (1) US5045245A (fr)
EP (1) EP0394629A3 (fr)
CA (1) CA2015080A1 (fr)
DE (1) DE3913334A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212008000073U1 (de) 2007-09-28 2010-07-29 Officine Meccaniche Pejrani S.R.L. Vorrichtung zum Desinfizieren geschlossener Räume
WO2011018529A1 (fr) 2009-08-14 2011-02-17 Karl August Brensing Dispositif d'introduction de gaz dans des liquides

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5474235A (en) * 1994-04-13 1995-12-12 Wheelabrator Technologies, Inc. Spray nozzle insert and method for reducing wear in spray nozzles
DE19502725B4 (de) * 1995-01-28 2004-03-04 Ing. Erich Pfeiffer Gmbh & Co Kg Austragvorrichtung für Medien
US5693226A (en) * 1995-12-14 1997-12-02 Amway Corporation Apparatus for demonstrating a residential point of use water treatment system
DE19830244C2 (de) * 1998-07-07 2000-05-18 Holter Gmbh & Co Einspritzkühler zur Temperaturregelung von überhitztem Dampf
US9492829B2 (en) * 2013-03-11 2016-11-15 Control Components, Inc. Multi-spindle spray nozzle assembly
US10603681B2 (en) * 2017-03-06 2020-03-31 Engineered Spray Components LLC Stacked pre-orifices for sprayer nozzles
CN111054569A (zh) * 2020-01-06 2020-04-24 佛山市南海科日超声电子有限公司 雾化片用弹性环件以及雾化设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2084292A5 (fr) * 1970-03-06 1971-12-17 Dresser Ind
DE2627880C2 (de) * 1976-06-22 1982-11-11 Jogindar Mohan Dr.-Ing. 7505 Ettlingen Chawla Verfahren für die Zerstäubung von Flüssigkeiten oder für die Zerteilung von Gasen in kleine Blasen
EP0122526A1 (fr) * 1983-04-13 1984-10-24 BBC Aktiengesellschaft Brown, Boveri & Cie. Injecteur de combustible pour la chambre de combustion d'une turbine à gaz
FR2617273A1 (fr) * 1987-06-26 1988-12-30 Passerat Jean Louis Canon a neige pour la production de neige artificielle

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US3331590A (en) * 1965-02-18 1967-07-18 Battenfeld Werner Pressure reducing control valve
DE1517502A1 (de) * 1966-12-31 1969-05-22 Noll Gmbh Maschinenfabrik W Strahlapparat zum Saettigen von Wasser mit gasfoermiger CO2
US4231383A (en) * 1970-03-06 1980-11-04 Dresser Industries, Inc. Method for controlling mass flow rate
DE2053991C3 (de) * 1970-11-03 1975-11-27 Joseph 8000 Muenchen Plannerer Vergaser fur Brennkraftmaschinen
FR2122682A5 (fr) * 1971-01-20 1972-09-01 Siderurgie Fse Inst Rech
US3721387A (en) * 1971-06-02 1973-03-20 United Aircraft Corp Ejector with variable mixing section and primary nozzle areas
DE2346099A1 (de) * 1973-09-13 1975-03-27 Bosch Gmbh Robert Kraftstoffeinspritzanlage
FR2326235A1 (fr) * 1975-10-01 1977-04-29 Renault Buse elastique a debit variable
US4000225A (en) * 1976-01-15 1976-12-28 Ford Motor Company Sonic flow variable area venturi carburetor
DE2648170C3 (de) * 1976-10-25 1981-03-19 Gerlieva Sprüh- und Antriebstechnik Inh. Gerd Linbrunner, 7801 Ehrenkirchen Sprühkopf
CH628251A5 (en) * 1977-08-31 1982-02-26 Ernst F Voegeli Mixing valve for admixing a liquid stream to a gas stream
US4180534A (en) * 1977-09-14 1979-12-25 Revas, Inc. Apparatus for dispensing a fuel-air mixture in an airstream
US4217313A (en) * 1978-04-21 1980-08-12 Dmitrievsky Anatoly V Device for reducing noxious emissions from carburetor internal combustion engines
JPS5525518A (en) * 1978-08-11 1980-02-23 Hitachi Ltd Electronic controlling device for carbureter
DE3024749A1 (de) * 1980-06-30 1982-02-04 Elmont AG, Kreuzlingen Verfahren und vorrichtung zur erzeugung eines aus einer duese o.dgl. austretenden gas/fluessigkeits-sprays insbesondere fuer die mundhygiene
SE449449B (sv) * 1984-11-26 1987-05-04 Bejaco Ab Forfarande for inblandning av finfordelad vetska i ett gasflode samt anordning for utovande av forfarandet
US4615485A (en) * 1985-06-10 1986-10-07 Graco Inc. Paint circulation adapter and coupler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2084292A5 (fr) * 1970-03-06 1971-12-17 Dresser Ind
DE2627880C2 (de) * 1976-06-22 1982-11-11 Jogindar Mohan Dr.-Ing. 7505 Ettlingen Chawla Verfahren für die Zerstäubung von Flüssigkeiten oder für die Zerteilung von Gasen in kleine Blasen
EP0122526A1 (fr) * 1983-04-13 1984-10-24 BBC Aktiengesellschaft Brown, Boveri & Cie. Injecteur de combustible pour la chambre de combustion d'une turbine à gaz
FR2617273A1 (fr) * 1987-06-26 1988-12-30 Passerat Jean Louis Canon a neige pour la production de neige artificielle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212008000073U1 (de) 2007-09-28 2010-07-29 Officine Meccaniche Pejrani S.R.L. Vorrichtung zum Desinfizieren geschlossener Räume
US8529833B2 (en) 2007-09-28 2013-09-10 Officine Meccaniche Perjrani S.r.l. Method and apparatus for disinfecting enclosed spaces
WO2011018529A1 (fr) 2009-08-14 2011-02-17 Karl August Brensing Dispositif d'introduction de gaz dans des liquides
DE102009026376A1 (de) 2009-08-14 2011-02-24 Karl August Dr. Brensing Vorrichtung zum Eintrag von Gas in Flüssigkeiten

Also Published As

Publication number Publication date
CA2015080A1 (fr) 1990-10-22
DE3913334A1 (de) 1990-10-25
US5045245A (en) 1991-09-03
EP0394629A3 (fr) 1991-08-14

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