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EP3651885B1 - Dispositif de traitement de véhicule - Google Patents

Dispositif de traitement de véhicule Download PDF

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Publication number
EP3651885B1
EP3651885B1 EP18728106.8A EP18728106A EP3651885B1 EP 3651885 B1 EP3651885 B1 EP 3651885B1 EP 18728106 A EP18728106 A EP 18728106A EP 3651885 B1 EP3651885 B1 EP 3651885B1
Authority
EP
European Patent Office
Prior art keywords
retaining means
bed
treatment device
foam
fill
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.)
Not-in-force
Application number
EP18728106.8A
Other languages
German (de)
English (en)
Other versions
EP3651885A1 (fr
Inventor
Andreas Sattler
Stefan Mayer
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.)
Washtec Holding GmbH
Original Assignee
Washtec Holding 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 Washtec Holding GmbH filed Critical Washtec Holding GmbH
Publication of EP3651885A1 publication Critical patent/EP3651885A1/fr
Application granted granted Critical
Publication of EP3651885B1 publication Critical patent/EP3651885B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4524—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls
    • B01F25/45241—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls through a bed of balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof

Definitions

  • the invention relates to a vehicle treatment device with a foam generation chamber, which can be designed as a cylindrical or prism-shaped hollow body and which is filled with a bed of loose particles permeable to fluids and at least one inlet for supplying a liquid and a gas as well as an outlet for discharging the in foam generated in the foam generation chamber.
  • foamable liquid typically being a detergent diluted with tap water or containing a detergent dissolved in tap water.
  • the pamphlet WO 2017/041781 A1 shows a foam generator with a foam generation chamber which has an inlet for water, surfactant and gas and an outlet for foam and contains a bed of loose particles which is permeable to fluids.
  • the mixture of liquid and gas flows through the bed, the loose particles of which shear the mixture and cause foam formation. Since tap water often carries along lime particles, these sink to the bottom of the foam generator, especially when there is no flow through the foam generator, and lie against the filler material. Over time, these limescale deposits grow and close the gaps between the particles and bake them up. The lime particles, which are introduced into the filler material of the foam generator via the liquid component of the foamable mixture and are deposited in the filler material, are therefore no longer carried out of the filler material and clog the filler material over time, which significantly affects the performance of the foam generator.
  • a basic idea of the invention is thus to create a foam generator from the filler material of which lime particles, which are carried into the filler material with the liquid component of the mixture, cannot accumulate on or in the gaps of the filler material, in particular are discharged again.
  • the foam generation device or the (cylindrical or prism-shaped) foam generation chamber has a fluid-permeable first retaining means which divides the foam generation chamber into a lower, first (cylindrical) chamber section and an upper, second (cylindrical) chamber section filled with the bed.
  • the first restraint means prevents the bulk material from reaching the upstream first chamber section.
  • the mesh size or the grid width i.e. the distance between the adjacent bars or struts, being sufficiently narrow to support the filling material and sufficient is wide in order to exceed the pore diameter of the filler material and to allow passage of lime particles.
  • the retaining means for example a grid floor
  • the retaining means can be designed in the form of a grate with struts or bars running essentially parallel to one another or in the form of a grid base with intersecting bars or in the form of a sieve.
  • cross bracing by crossing bars provides more stability, which is particularly advantageous in the case of heavy filling material and / or high water columns.
  • the distances between adjacent struts of the restraint are smaller than a particle diameter of the bed, preferably smaller than the smallest particle diameter of the bed, and larger than a pore size or a pore diameter of the bed, preferably larger than the mean pore diameter of the bed and particularly preferably larger than the largest pore diameter of the bed.
  • the width of the struts (each strut) of the restraint means is particularly preferably less than the mean particle diameter of the bed, preferably less than the smallest particle diameter of the bed.
  • the width of the struts of the restraint means is particularly preferably smaller than the mean pore size or the mean pore diameter of the bed, preferably smaller than the smallest pore size or the smallest pore diameter of the bed.
  • the struts (each strut) of the retaining means are at most half as wide as the mean pore size or the mean pore diameter of the bed, preferably half as wide as the smallest pore size or the smallest pore diameter of the bed.
  • the width here means the shorter extension of the struts orthogonal to the direction of flow.
  • the longer extension of the struts orthogonal to the direction of flow is referred to here as the length.
  • the width of the strut means in particular the widest dimension over the entire length of the strut in the area in which the strut is located below the particle bed.
  • the struts particularly preferably have a round cross section.
  • a retaining element for the filler material is arranged below a bed of particles, which element is permeable to lime particles and ensures their separation from the filler material.
  • the retaining means ideally has the smallest possible contact surface for lime particles.
  • the first retaining means is arranged at the furthest cross-section of the second chamber section, it is ensured that the lime particles can fall or sink completely or over the entire cross-section into the first chamber section (of the same diameter), and thus no limescale deposits on a shoulder, step, Form constriction or tapering of the second chamber section and from there connect or bake the particles of the bed.
  • a second fluid-permeable restraint means which is preferably similar or identical to the first restraint means and which restricts an expansion of the bed, is preferably provided downstream of the second chamber section.
  • the maximum degree of expansion of the bed can be determined by the (height) position of the second retaining means in the foam generation chamber.
  • the filler material preferably contains or consists of a bed of balls, in particular balls of the same size.
  • the diameter of the balls is particularly preferably between 1.25 mm and 1.65 mm, extremely preferably 1.45 mm. It is also conceivable to use balls with a larger diameter for coarser foams.
  • the pore size can, for example, be calculated analogously to the octahedral gap and is always a function of the diameter of the balls used in the bed.
  • the largest achievable pore size corresponds to the octahedral gap in a face-centered cubic grid (vehicle grid).
  • the cross-sectional geometry of the bed i.e. the edges of the bed, which cannot be included in the octahedron model, has an influence on the pore size.
  • the pore diameter can never be larger than the diameter of the balls in the bed.
  • the porosity of a ball bed is known from the literature and is approx. 43% in the loose bed state and approx. 37% in the compacted state (this is achieved, for example, by shaking the bed).
  • a bed that is as homogeneous as possible can advantageously be achieved.
  • the distance between the particles, which corresponds to the pore size or the pore diameter or the channel width of the bed, can also advantageously be controlled via the sphere diameter.
  • the spheres made of glass are further preferred.
  • Glass is advantageous in that it is an inert material and therefore does not interact with the surrounding medium.
  • the smooth surface structure of the Glass do not add any smaller particles from the foaming mixture to the surface of the spheres.
  • the first retaining means is preferably fastened in the foam generating device in a detachable and / or exchangeable manner, in particular via a separation point. Since lime particles may accumulate on the bars over a longer period of time, it is advantageous to be able to remove the retaining means for cleaning or to be able to replace it with a new one.
  • the first chamber section of the foam generation device is preferably detachably and / or exchangeably connected to the second chamber section of the foam generation device, in particular via a separation point.
  • the lime particles that have been trickled down will collect and pile up in the first section below the retaining means.
  • the foam generation device can be of modular construction so that the lower section can be removed and cleaned or, if necessary, replaced with a new one.
  • An outlet is preferably provided in the first chamber section at a point upstream of the inlet.
  • the drain can be designed as a sump or be arranged level with the bottom surface of the foam generating device, so that no step is created between the bottom surface and the drain, which can prevent residues from forming that cannot be washed out.
  • the bottom surface has a slight incline and the drain is arranged at the lowest point or at the lowest edge of the floor surface. This makes it easier for lime particles to be rinsed out and run off when cleaning the foam generating device.
  • an overflow is arranged above the bed, for example in the upper chamber section. This advantageously enables the im Carrying out or flushing out any filler material present, for example, lime particles that got stuck during the drainage process, to the upper end of the bed beyond the bed. The lime particles present in the bed are therefore flushed out of the foam generating device via the overflow.
  • an optionally openable overflow is provided in the direction of flow between the second retaining means and the drain. This advantageously enables lime particles to be carried beyond the bed in the direction of flow and to be able to be removed from the foam generating device through the overflow.
  • the overflow can be closed so that the foam does not get into the overflow when the foam is being produced.
  • a schematic representation of a foam generating device 1 is shown in a first embodiment.
  • the foam generation device 1 has a foam generation chamber 2, which has a first chamber section 2a and a second chamber section 2b, which are separated from one another by a first retaining means 4.
  • a filler material in the form of a bed 3 of balls of the same size is provided in the foam generation chamber.
  • a first retaining means 4 in the form of a grid floor, which supports the balls of the bed 3.
  • an inlet 5 is provided for a foamable liquid, which usually consists of water, for example tap water, and a foamable detergent.
  • a feed device 6 is provided in the bottom area of the foam generation device 1, via which a gas, for example air or compressed air, is introduced into the foam generation device 1. It is also conceivable that liquid and gas are brought together outside of the foam generation device 1 and are already premixed and fed into the foam generation device 1 via a common feed line.
  • a gas for example air or compressed air
  • the foamable liquid and the gas are mixed in the foam generation device 1 and, with the application of pressure, for example via a pump, are guided vertically in the direction of an outlet 7 in the form of a foam outlet opening arranged downstream or above the bed 3.
  • the foamable mixture of foamable liquid and gas (hereinafter referred to as mixture) flows through bed 3, the mixture being sheared when flowing through the pores of bed 3 and forming foam bubbles.
  • the second restraint means 8 in the Foam generation chamber 2 determine how far the bed 3 can expand when the mixture flows through or how compact the bed 3 should be kept when the mixture flows through.
  • the outlet 7 At the upper section of the foam generation chamber 2 (in the second chamber section 2b) is the outlet 7, from which the foam formed when flowing through the bed 3 leaves the foam generation device 1. After the end of foam formation / the flow through the bed, for example after switching off the pump, the mixture remains in the bed.
  • a separation point 9 at which the first chamber section 2a of the foam generation chamber 2 can be separated from the second chamber section 2b of the foam generation chamber 2. This is particularly advantageous for cleaning (of limescale deposits) the first chamber section 2a.
  • An exemplary embodiment of such a separation point 9 is a screw thread with a corresponding seal.
  • tap water is mixed with a detergent (foamable liquid / foam generator) and fed into the foam generator 1 during operation.
  • Tap water usually carries calcium particles with it, the concentration of which can vary depending on the hardness of the water.
  • An alkaline agent also destabilizes the lime carried in the tap water, so that it crystallizes in the standing water mixture (after the flow has been interrupted / the pump has been switched off). So that these lime particles, especially when the filling material is no longer flowed through, do not accumulate in the pores between the balls and block or clog them, the distances between the bars of the first restraint means 4 are chosen so that the balls of the bed 3 are retained and existing lime particles can fall through the gaps between the bars.
  • Accumulating / destabilized lime particles can thus sink and fall or sink to the bottom of the foam generation device 1 after the flow has been interrupted / after the pump has been switched off in the standing water of the bed 3 It is important that the external dimensions of the first retaining means 4 at least cover or exceed the external dimensions of the bed 3 so that all sinking lime particles, in particular at the edges of the bed 3, can be separated from the bed 3 via the first retaining means 4.
  • the bars can in principle have different cross-sections, a round cross-section being particularly advantageous in order to keep the attachment surface for lime particles as small as possible.
  • Any lime particles remaining in the bed 3 can be carried out the next time it flows through the bed 3 in the direction of flow towards the outlet 7 and thus removed from the foam generation device 1.
  • the second retaining means 8 corresponds to the same or a similar construction as that of the first retaining means 4, so that balls from the bed 3 are retained by the second retaining means 8, but lime particles flowing up can pass the second retaining means 8.
  • Fig. 2 shows a schematic structure of a first restraint means 4 in the form of a grid floor in a first embodiment.
  • the bars do not cross one another and are arranged essentially parallel. Thus, the contact surface for lime particles is reduced to a minimum.
  • Fig. 3 a second embodiment of a first restraint means 4 in the form of a grid floor is shown schematically. In this embodiment, the bars cross, which gives the grid floor more stability.
  • Fig. 4 shows a schematic structure of a foam generation device 1 according to the invention in a second embodiment.
  • the basic structure of the second exemplary embodiment is the same as the first exemplary embodiment, so that only differences are discussed below.
  • the first chamber section 2a i.e. the area of the foam generation chamber 2 below the first restraint means 4
  • has a cone-like constriction or a sump so that the flow cross-section widens in the flow direction of the mixture after the inflow of liquid and the supply of gas, as a result of which on the one hand the flow dynamics can be influenced advantageously and on the other hand in the case of cleaning of the foam generating device 1 Do not form any residues when the residual liquid / standing water drains off.
  • the drain (not shown) is at the deepest point of the sump.
  • Fig. 5 shows a schematic structure of a foam generation device 1 according to the invention in a third embodiment.
  • the basic structure of the third exemplary embodiment is the same as the first exemplary embodiment, so that only differences will be discussed below.
  • the base of the foam generating device 1 is arranged at an angle, so that an edge region of the base (right side in the figure) is lower than the opposite edge region of the base (left side in the figure).
  • a drain 10 is arranged on the lower edge region of the floor.
  • the floor can be freed of fallen lime particles during the cleaning of the foam generating device 1 by introducing liquid through the inlet 5, possibly tap water without detergent, into the foam generating device 1 and conveying the fallen lime particles from the liquid to the drain 10 and out of the foam generating device 1 must be rinsed out.
  • the inflow rate of the liquid is selected or controlled in such a way that the liquid level does not reach the first restraint means 4. There is no gas supply during this flushing process.
  • the drain 10 is closed, for example via a controllable valve or a lid.
  • an opening is provided in the foam generation chamber 2, to which an overflow 11 (left side in the figure) can be connected and which can otherwise be closed with a closure means, for example a stopper 12 (right side in the figure). is locked.
  • a closure means for example a stopper 12 (right side in the figure).
  • the opening in the foam generation chamber 2, to which the overflow 11 is connected is closed, for example by means of a stopper 12 or a lid. It is also conceivable that an overflow 11 is permanently connected to the foam generation chamber 2 and is closed by a valve or other controllable closure means during the foam generation.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (10)

  1. Dispositif de traitement de véhicule, qui présente un dispositif de production de mousse (1) avec une chambre de production de mousse (2) orientée verticalement, qui est remplie d'un produit en vrac (3) de particules libres perméable aux fluides et qui présente au moins une arrivée (5, 6) pour l'alimentation d'un liquide et d'un gaz et un échappement (7) pour l'évacuation de la mousse produite dans la chambre de production de mousse, dans lequel
    la chambre de production de mousse (2) est subdivisée en une première section de chambre inférieure (2a) et une seconde section de chambre supérieure (2b) remplie du produit en vrac (3) par l'intermédiaire d'un premier moyen de retenue (4) perméable aux fluides, dans lequel le premier moyen de retenue (4) empêche le produit en vrac (3) de pénétrer dans la première section de chambre inférieure (2a) ; caractérisé en ce que le premier moyen de retenue (4) est disposé au niveau de la section transversale la plus large de la seconde section de chambre (2b), et en ce que le premier moyen de retenue (4) est conçu en forme de grille, dans lequel la distance entre les entretoises adjacentes du moyen de retenue (4) est inférieure à un diamètre de particule du produit en vrac (3) et supérieure à la taille moyenne des pores du produit en vrac (3).
  2. Dispositif de traitement de véhicule selon la revendication 1, caractérisé en ce que la largeur des entretoises du moyen de retenue (4) est inférieure à la taille moyenne des pores du produit en vrac (3).
  3. Dispositif de traitement de véhicule selon la revendication 1 ou 2, caractérisé en ce que les entretoises du moyen de retenue (4) présentent une section transversale ronde.
  4. Dispositif de traitement de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un second moyen de retenue (8) perméable aux fluides, de préférence similaire ou identique au premier moyen de retenue (4), est prévu au-dessus de la seconde section de chambre (2b) et limite une expansion du produit en vrac (3).
  5. Dispositif de traitement de véhicule selon la revendication 4, caractérisé en ce que le second moyen de retenue (8) est conçu en forme de grille ou de tamis, dans lequel la distance entre les entretoises adjacentes du moyen de retenue est inférieure à un diamètre de particule du produit en vrac (3) et supérieure à la taille moyenne des pores du produit en vrac (3).
  6. Dispositif de traitement de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce que le produit en vrac (3) contient ou est constitué de billes, notamment de billes de taille égale, de préférence en verre.
  7. Dispositif de traitement de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier moyen de rétention (4) est fixé de manière amovible dans le dispositif de production de mousse (1).
  8. Dispositif de traitement de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce que la première section de chambre (2a) et la seconde section de chambre (2b) sont connectées l'une à l'autre de manière amovible.
  9. Dispositif de traitement de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un drain (10) est prévu dans la première section de chambre (2a) à un endroit sous l'arrivée (5, 6).
  10. Dispositif de traitement de véhicule selon la revendication 9, caractérisé en ce qu'un déversoir (11) pouvant être ouvert au choix est prévu dans la direction d'écoulement entre le second moyen de retenue (8) et le drain (10).
EP18728106.8A 2017-07-12 2018-05-28 Dispositif de traitement de véhicule Not-in-force EP3651885B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017115645.3A DE102017115645A1 (de) 2017-07-12 2017-07-12 Schaumerzeugungseinrichtung für eine Fahrzeugbehandlungseinrichtung
PCT/EP2018/063915 WO2019011513A1 (fr) 2017-07-12 2018-05-28 Dispositif de production de mousse pour un dispositif de traitement de véhicule

Publications (2)

Publication Number Publication Date
EP3651885A1 EP3651885A1 (fr) 2020-05-20
EP3651885B1 true EP3651885B1 (fr) 2021-09-22

Family

ID=62455473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18728106.8A Not-in-force EP3651885B1 (fr) 2017-07-12 2018-05-28 Dispositif de traitement de véhicule

Country Status (4)

Country Link
EP (1) EP3651885B1 (fr)
DE (1) DE102017115645A1 (fr)
ES (1) ES2900167T3 (fr)
WO (1) WO2019011513A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110652893A (zh) * 2019-09-17 2020-01-07 李常德 一种微气泡发生装置以及气泡分割元件
FR3124097B1 (fr) * 2021-06-16 2025-11-28 Commissariat Energie Atomique Dispositif autonome de generation de mousse viscosee
FR3124095B1 (fr) * 2021-06-16 2025-11-21 Commissariat Energie Atomique Buse de projection d’une mousse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8034885U1 (de) * 1980-12-31 1981-04-23 Kränzle, Josef, 7918 Illertissen Schaumerzeugungskopf
DE3328530A1 (de) * 1983-08-06 1985-02-21 Mathias 4815 Schloss Holte Mitter Schaumgenerator
IE880496L (en) * 1988-02-24 1989-08-24 Pandion Haliaetus Ltd Silver S Foaming apparatus for car wash.
US20060013062A1 (en) * 2004-07-16 2006-01-19 Henry Gembala Lightweight foam carburetor
DE102015011501A1 (de) 2015-09-09 2017-04-27 Washtec Holding Gmbh Schaumerzeuger

Also Published As

Publication number Publication date
DE102017115645A1 (de) 2019-01-17
WO2019011513A1 (fr) 2019-01-17
EP3651885A1 (fr) 2020-05-20
ES2900167T3 (es) 2022-03-16

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