EP0618847A1 - Procede et dispositif pour le traitement aux ultrasons et pour la transmission de vibrations a un liquide soumis aux ultrasons renfermant des particules. - Google Patents

Procede et dispositif pour le traitement aux ultrasons et pour la transmission de vibrations a un liquide soumis aux ultrasons renfermant des particules.

Info

Publication number
EP0618847A1
EP0618847A1 EP93921774A EP93921774A EP0618847A1 EP 0618847 A1 EP0618847 A1 EP 0618847A1 EP 93921774 A EP93921774 A EP 93921774A EP 93921774 A EP93921774 A EP 93921774A EP 0618847 A1 EP0618847 A1 EP 0618847A1
Authority
EP
European Patent Office
Prior art keywords
liquid
resonator
compartment wall
particles
sonication
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
EP93921774A
Other languages
German (de)
English (en)
Other versions
EP0618847B1 (fr
Inventor
Franz Gaehler
Urs Keller
Roland Meier
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.)
Sofima AG
Original Assignee
Sofima 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 Sofima AG filed Critical Sofima AG
Publication of EP0618847A1 publication Critical patent/EP0618847A1/fr
Application granted granted Critical
Publication of EP0618847B1 publication Critical patent/EP0618847B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound

Definitions

  • the invention relates to a method and a device for sonication and for the transmission of vibrations to a sonication liquid containing particles as per one of claims 1, 7 and 21.
  • ultrasonic cleaning systems have been used for cleaning the surfaces of jewelry, but also machine parts, which consist of a container containing a cleaning liquid, an ultrasonic generator and one or more sound transducers, which are attached to the outside of the container walls and vibrate move and transfer the vibrations to the liquid.
  • the sound transducers have poor adaptability to the load, which is composed of the container, the cleaning liquid or the coupling medium and the objects immersed therein for cleaning.
  • the physical conditions such as the working frequency, the transmission behavior of the container, the damping of the coupling fluid and the material to be cleaned, also set limits to the dimensions of the cleaning systems.
  • a typical pie zoelectric sound transducer for a working frequency of 20 kHz has a length of approximately 100 mm and a lateral dimension of approximately 65 mm.
  • Such a sound transducer can only radiate 2 to 6% of the energy to the coupling medium; the rest causes heat in the transducer, which is dissipated and / or only allows short switch-on times.
  • another factor stands in the way of a good adaptation of the load to the coupling liquid and the objects to be cleaned immersed therein. The sound power radiated per unit area cannot be increased arbitrarily, because the cavitation partially decouples the sound transducer from the coupling fluid.
  • a measuring instrument for measuring the characteristics of liquids (US-A-3, 680,841) is also known from the European search report.
  • a sonication device immersed in a container filled with liquid is intended to prevent precipitation from forming on the areas of measuring electrodes immersed in the liquid.
  • a liquid is filled in the latter. This protective jacket acts as a resonator and transmits the ultrasound waves directly to the liquid to be measured.
  • the vibrator According to the US specification, it should be possible with the vibrator to prevent deposits on the two electrodes with low energy, so that, for example, the quality of a pH measurement can always be constant, even if the liquid is partially crystallized. Since the sound transducer is surrounded by a jacket, it can be used directly in hot and corrosive liquids and cooled by the liquid. The liquid, for example, to be measured for its pH value, contains no suspended particles to be cleaned, which have a dampening effect on the propagation of the sound waves. Problems with the vibrator. this application does not occur in order to start up or maintain its operation. It is not possible to use the probe known from US Pat. No. 3,680,841 for the sonication of attenuation-rich sonication media.
  • the object of the present invention is to provide a method and a device for generating sound waves and for removing particles present in a sound reinforcement from their adhering deposits or impurities.
  • the sound probe or the resonator succeeds despite the loss of energy through the additional transmission media, which prevent the contact of the resonator with the sonication fluid and the particles to be cleaned, which are essentially independent of the damping properties of the particles and the particle-containing sonication and coupling fluid.
  • the compartment wall used to separate the transmission medium is set in motion by the sound waves emitted by the resonator and transmits them to the particles to be sonicated.
  • the vibrations are also emitted to the sonication fluid in all directions, so that the sound waves can cross in the sonication medium and thus also hit the particles to be sonicated from all sides.
  • Figure 5 shows a longitudinal section through a
  • Figure 6 shows a longitudinal section through a
  • FIG. 7 shows a longitudinal section through a
  • FIG. 8 shows a longitudinal section through a
  • FIG. 9 shows a longitudinal section through a pipe
  • FIG. 10 shows a longitudinal section through a
  • Figure 11 shows a longitudinal section through a
  • the public address device 1 has a hollow or solid resonator 3 with a diameter d of, for example, 48.5 mm, which is connected to a sound transducer 6, which is shown only schematically in FIG.
  • the sound transducer 6 is arranged outside the tube-shaped resonator 3 here and connected at the end to the latter.
  • a magnetostrictive or a piezoelectric sound transducer 6 can be attached.
  • the sound probe, designated as a whole by 2 is connected at its one end, which contains the sound transducer 6, to the wall 8 of a sound container 10 via flange 13.
  • the resonator 3 can also have a shape other than a tubular geometric shape.
  • the sound transducer 6 is supplied with energy by a sound generator 16, which is likewise arranged outside the resonator 3 and the sound container 10, via the line 12.
  • a jacket-shaped compartment wall 9 surrounds the resonator 3 in the first example.
  • the compartment wall 9, with the resonator 3 arranged therein, is immersed in a sound reinforcement liquid 11 to be sonicated.
  • the compartment wall 9, the diameter D of which is, for example, 85 mm, is at least partially vibration-connected to the resonator 3 via a transmission medium or a transmission liquid 15 located in the space between the surface of the resonator 3 and the inner surface of the compartment wall 9.
  • the intermediate space 7 between the resonator 3 and the compartment wall 9 can thus be completely or partially filled with the transmission liquid 15, which transmits the vibrations initially transmitted from the resonator 3 to the transmission liquid 15 to the sonication liquid 11 and the particles 32 introduced therein and the particles thereon sedentary deposits 34 transfers (only a few shown in Figures 1 and 2).
  • the compartment wall 9 can be used for indirect transmission be a closed vibratory body or a perforated body for direct transmission; it can also be designed in the form of a net or lattice or as a textile fabric and the passage of
  • the compartment wall 9 consequently serves to create a low-damping zone between the resonator 3 and the sonication liquid 11 with the parts 32 contained therein.
  • low-damping transmission liquid 15 can be used for the transmission of the vibrations generated at the resonator 3 to the compartment wall 9 water.
  • the jacket-shaped compartment wall 9 can be made, for example, of metal, glass or plastic, with their
  • Natural resonance behavior is preferably adapted to the desired sound frequencies.
  • a liquid-permeable compartment wall 9 acts as a sieve and the liquid present between the resonator 3 and the compartment wall 9 is in this case identical to the sonication liquid 11.
  • the transmission of the vibrations from the resonator 3 to the particles to be sonicated now takes place in this embodiment of the invention directly through the particle-free sonication liquid 11 in contact with the resonator 3 and to a lesser extent also through the compartment wall 9.
  • the vibratory compartment wall 9, which acts as a sound or vibration transmitter can have a structured surface (FIG. 3). This enables the sound waves to be emitted in mutually intersecting directions.
  • elevations or thorn-shaped or rod-shaped attachments 21 can be attached to the surface of the compartment wall, which also allow a confused radiation of the sound waves.
  • the compartment wall 9 can alternatively have the shape of a bag consisting of a film or mesh in order to separate the transmission liquid 15 from the sonication liquid 11.
  • the bag 17 can also be attached to the end of a compartment wall 9 which extends only over a partial length of the resonator 3.
  • the resonator 103 can be designed as a hollow body, in which the compartment wall 109 is inserted, forming an intermediate space 107 for the transmission liquid 115.
  • both the resonator 103 and the compartment wall 109 used in it are tubular.
  • the sonication fluid 111 with the particles 132 to be sonicated is then located within the compartment wall 109, which can be set in motion by the transmission liquid 115. Direct contact between the surface of resonator 103 and the The sonication fluid 111 in the space 107 and the particles 132 therein does not take place. With this embodiment, a greater sound wave density is achieved in the sonication liquid 111.
  • a liquid-tight or a liquid-permeable compartment wall 109 can also be used here.
  • transmission fluid 215 shown as a helix
  • Sonication liquid a liquid antel are generated, which largely prevents direct contact of the particles 232 in the sonication liquid 211 with the resonator 203.
  • a flow of the transmission medium 215 running parallel to the longitudinal axis of the resonator 203 could also be generated (cf. also the embodiment according to FIG. 9).
  • the resonator 303 is arranged in a compartment wall 309 which is spherical in the lower region 324 and which is in contact with the resonator 303 through the transmission liquid 315.
  • a guide wall 328 is arranged parallel to the latter, the lower end 330 of which ends at a distance from the spherical section 324 with the formation of a gap X.
  • the container 310 in which the resonator 303 of the acoustic probe 302 is immersed, has a cylindrical configuration in the upper section.
  • the contour of the container runs in the region of the spherical section 324 of the compartment wall 309 310 in sections approximately parallel to the spherical section 324.
  • the spherical section 324 can be arranged independently of the compartment wall 309 below this (no illustration).
  • the container 310 ends in a line 312 below.
  • the combination of the described features forms an upflow classifier, in which particles 332 of different sizes and / or formed, which are suspended in the sonication liquid 311 and have been released by the sound probe 302, can be separated and discharged separately.
  • the separation is carried out as described below.
  • particles 332 loaded with deposits are introduced into the sonication fluid 311 and sink downward under their own weight. As they pass the path downwards, they are sonicated by sound waves from the sound probe 302, and the deposits 334 are detached from the particles 332, that is to say they are liberated.
  • the spherical section 324 is also caused to vibrate by the sound probe 302 and therefore also transmits these vibrations in the region under the guide wall 328 to the sounding fluid 311.
  • the detached deposits 334 the size of which is generally smaller than the size of the particles 332, get into a flow (arrow P), which is generated by a liquid that is admitted through line 312.
  • the detached and released deposits 311 are moved upward in the annular channel between the guide wall 328 and the wall of the container 310 by the flow P. transported and can be removed there (arrow Q).
  • the heavier particles 332, which have been freed of the deposits 324, go down through their own weight against the upward flow P and can leave the container 310 and be removed through the line 312.
  • the compartment wall 409 encloses the resonator 403 as in the example according to FIG. 1.
  • the container 410 there is a treatment room 418 which is delimited by two liquid-permeable wall surfaces 428,446.
  • the lower end of the inner wall 428 of the treatment room 418 is connected to a floor 438; the outer wall 446 is connected to the bottom of the container 410.
  • the container 410 is connected to a line 412 at the bottom via a valve 440.
  • the outer wall 446 is further connected at the bottom to a feed line 442 and at the top a drain line 444 for rinsing liquid.
  • Contaminated particles 432 are introduced into the annular space of the treatment space 418 and sink downward in the sonication fluid 411 and are sonicated at the same time.
  • the detached liberated deposits 434 are rinsed out by a liquid flow (arrows R) which is introduced between the compartment wall 409 and the inner wall 428 of the treatment room 418 and through the treatment room 436 and can be rinsed there by a further liquid flow (arrows S) above or below, if the flushing takes place in the opposite direction, can be removed from the container 410.
  • the cleaned particles 432 leave the container 410 - 11 -
  • Styrofoam or the like are on from below and from above
  • Container 410 discharged.
  • the dwell time of the particles 432 to be cleaned can be controlled with the flow velocity in the line 412.
  • Batch operation can take place by closing the treatment room 436 - below and / or above.
  • the compartment wall 509 is formed by the inner wall of the treatment room 518. Otherwise, the design of the device (resonator 503, container 510) and the functioning of the cleaning of the particles 532 are identical to those in the fourth exemplary embodiment.
  • the compartment wall 609 is designed as a tube and wraps around the resonator 603 in a helical manner. Both the helical compartment wall 609 and the resonator 603 are immersed in the transmission liquid 615, which is filled in a container 610. In the interior of the tubular compartment wall is the sonication liquid 611 with the parts 632 loaded with deposits 634.
  • the sonication liquid 611 with the deposits 634 detached during the passage is passed into a separation device, in the present example into a centrifuge 650.
  • a separation device in the present example into a centrifuge 650.
  • deposits 634 and sonication liquid 611 are separated from the particles 632.
  • the particles 632 can be, for example, kieselguhr particles from beer filtration be, of which deposits 634 of yeast, protein and the like have been removed in the device.
  • the particles 632 are separated from the detached impurities 634 in an upflow classification process at the end of the helical sound path.
  • a rinsing liquid is introduced from below, which transports the detached particles 634 upwards, where they can also leave the container 610.
  • transmission fluid used in the description is understood to mean a fluid which essentially contains no or only a small number of low-mass particles and consequently counteracts the propagation of the sound waves with little damping.
  • the sonication liquid can support the cleaning effect and the removal of the deposits, e.g. Lye.
  • the transmission fluid can be identical or different with the sonication fluid.
  • the sound probe can e.g. an ultrasonic probe RS-20 available from Telsonic AG CH-9552 Bronschhofen or a similar product.
  • Both the rigid and the bag-shaped compartment wall can only extend over part or the entire height of the sound container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention a pour objet un procédé pour la production de vibrations et leur transmission à un liquide soumis aux ultrasons (11), selon lequel les ondes d'ultrasons sont produites par une sonde acoustique (2) munie d'un transformateur acoustique (6) et d'un résonateur (3) fixé à ce transformateur. Le résonateur (3) est entouré, conformément à l'invention, par la paroi d'un compartiment (9), l'espace intermédiaire (7) compris entre le résonateur (3) et la paroi (9) étant rempli d'un liquide de transfert (15). Ce dernier transmet les vibrations de la surface du résonateur (3) au liquide (11) entourant la paroi (9). Le résonateur (3) peut être mis en fonctionnement indépendamment des propriétés d'amortissement du liquide soumis aux ultrasons (11) et des particules qu'il contient à soumettre aux ultrasons.
EP93921774A 1992-10-08 1993-10-08 Procede et dispositif pour le traitement aux ultrasons et pour la transmission de vibrations a un liquide soumis aux ultrasons renfermant des particules Expired - Lifetime EP0618847B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3150/92 1992-10-08
CH315092 1992-10-08
PCT/CH1993/000241 WO1994008732A1 (fr) 1992-10-08 1993-10-08 Procede et dispositif pour le traitement aux ultrasons et pour la transmission de vibrations a un liquide soumis aux ultrasons renfermant des particules

Publications (2)

Publication Number Publication Date
EP0618847A1 true EP0618847A1 (fr) 1994-10-12
EP0618847B1 EP0618847B1 (fr) 1996-03-27

Family

ID=4249697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93921774A Expired - Lifetime EP0618847B1 (fr) 1992-10-08 1993-10-08 Procede et dispositif pour le traitement aux ultrasons et pour la transmission de vibrations a un liquide soumis aux ultrasons renfermant des particules

Country Status (5)

Country Link
EP (1) EP0618847B1 (fr)
JP (1) JPH07501981A (fr)
AU (1) AU5105993A (fr)
DE (1) DE59302055D1 (fr)
WO (1) WO1994008732A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1188682A (zh) * 1997-01-24 1998-07-29 北京创格科技集团 悬浮液的超声分离和清洗装置
DE10132069A1 (de) * 2001-07-05 2003-01-16 Buehler Ag Verfahren zum Beeinflussen der rheologischen Eigenschaften eines Fluids
CN104858122B (zh) * 2015-04-15 2017-04-05 清华大学 弹性波模式分离方法及弹性波模式分离系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR745611A (fr) * 1933-05-13
FR1359616A (fr) * 1960-07-05 1964-04-30 Csf Nouveau projecteur d'ondes acoustiques
US3310129A (en) * 1964-09-08 1967-03-21 Beehler Vernon D Sonar wand
JPS5415118Y1 (fr) * 1969-10-23 1979-06-19
FR2338745A1 (fr) * 1976-01-22 1977-08-19 Nemours Cie Fse Silices Sables Procede et dispositif de purification de mineraux et notamment de sable par action de faisceaux d'ondes ultra-sonores
JPH01156787U (fr) * 1988-04-22 1989-10-27

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9408732A1 *

Also Published As

Publication number Publication date
WO1994008732A1 (fr) 1994-04-28
DE59302055D1 (de) 1996-05-02
AU5105993A (en) 1994-05-09
EP0618847B1 (fr) 1996-03-27
JPH07501981A (ja) 1995-03-02

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