EP3651885A1 - Foam generator for a vehicle treatment device - Google Patents
Foam generator for a vehicle treatment deviceInfo
- Publication number
- EP3651885A1 EP3651885A1 EP18728106.8A EP18728106A EP3651885A1 EP 3651885 A1 EP3651885 A1 EP 3651885A1 EP 18728106 A EP18728106 A EP 18728106A EP 3651885 A1 EP3651885 A1 EP 3651885A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bed
- foam
- retaining means
- generating device
- 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.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 91
- 239000002245 particle Substances 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims description 30
- 239000011521 glass Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000012856 packing Methods 0.000 abstract 4
- 239000012530 fluid Substances 0.000 abstract 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 33
- 235000011941 Tilia x europaea Nutrition 0.000 description 33
- 239000004571 lime Substances 0.000 description 33
- 239000000463 material Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 15
- 239000008399 tap water Substances 0.000 description 10
- 235000020679 tap water Nutrition 0.000 description 10
- 239000000945 filler Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 6
- 239000003599 detergent Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 208000004434 Calcinosis Diseases 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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 foam generating device, also as
- Foam generator or foam reactor in particular for a
- a vehicle treatment device comprising a foam generating chamber, which may be formed as a cylindrical or prismatic hollow body and which is filled with a fluid-permeable bed of loose particles and at least one inlet for supplying a liquid and a gas and an outlet for discharging the generated in the foam-generating chamber Foam has.
- foamable liquid is typically a detergent diluted with tap water or dissolved in tap water
- Detergent contains.
- the document 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 fluid-permeable bed of loose particles.
- a basic idea of the invention is therefore to provide a foam generator from the filling material of which lime particles which are carried with the liquid component of the mixture into the filling material can not store on or in the gaps of the filling material, in particular can be discharged again.
- the foam generation device or the (cylindrical or prismatic) foam generation chamber has a fluid-permeable first
- Retaining means dividing the foam generating chamber into an upstream (or lower vertical orientation), first (cylindrical) chamber section, and a downstream (or upper vertical orientation) filled with the second (cylindrical) chamber section.
- the first retaining means prevents the bed from entering the upstream first chamber section.
- a retaining means a sieve or a
- the retaining means for example, a grid floor, in the form of a grid with substantially mutually parallel struts or bars or in the form of a grid floor with intersecting bars or be formed in the form of a screen.
- a grid floor in the form of a grid with substantially mutually parallel struts or bars or in the form of a grid floor with intersecting bars or be formed in the form of a screen.
- a cross brace by intersecting bars provides more stability, which is especially true at
- heavyweight filling material and / or high water columns is advantageous.
- the distances between adjacent struts of the retaining means 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 average
- Pore diameter of the bed and more preferably greater than the largest pore diameter of the bed.
- Retention means 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 retaining means is less than the average pore size or the average pore diameter of the bed, preferably less than the smallest pore size or the smallest pore diameter of the bed. More preferably, the struts (each strut) of the retaining means are at most half as wide as the mean pore size or the average pore diameter of the bed, preferably half as wide as the smallest pore size or the smallest pore diameter of the bed.
- the widest dimension across the entire length of the strut in the area in which strut is located below the particle bed in particular, the widest dimension across the entire length of the strut in the area in which strut is located below the particle bed.
- the struts have a round cross-section.
- a retaining element for the filling material is arranged, which is permeable to lime particles and ensures their separation from the filling material.
- the retention means ideally has the smallest possible support surface for lime particles.
- Chamber portion is arranged, it is ensured that the lime particles completely or over the entire cross section in the first chamber section (same
- Diameter can fall or fall, and thus form any limescale deposits on a shoulder, step, narrowing or narrowing of the second chamber section and can connect or bake from there the particles of the bed.
- downstream of the second chamber portion is a second fluid-permeable, preferably similar or identical, to the first retention means
- Retention means is provided which limits an expansion of the bed.
- Foam outlet opening can be distended, not from the
- Foam generating chamber out or can be flowed out.
- Foam generating chamber the maximum degree of expansion of the bed will be determined.
- the filler contains a bed of balls, in particular balls of equal size, or consists of these.
- the diameter of the balls is particularly preferably between 1, 25 mm and 1, 65 mm, exceptionally preferably 1, 45 mm. It is also conceivable, for coarser foams balls with larger
- the pore size can be calculated, for example, analogous 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 cubic face-centered lattice (automotive lattice).
- the influence on the pore size also has in particular the cross-sectional geometry of the bed, i. the edges of the bed, which can not be included in the octahedron model.
- the pore diameter can never be greater than the diameter of the balls in the bed.
- the porosity of a ball bed is known from the literature and is approximately 43% in the loose bulk state and in the konnpakt elected state (this is
- the distance between the particles can be controlled via the ball diameter, which corresponds to the pore size or the pore diameter or the channel width of the bed.
- the balls are made of glass. Glass is advantageous in that it is an inert material and thus does not undergo any interaction with the surrounding medium. In addition, due to the smooth surface texture of the Glases no smaller particles from the foaming mixture on the surface of the balls attach.
- the first retaining means in particular via a
- Attaching bars 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 is preferably the
- Foam generating device in particular via a separation point, releasably and / or interchangeably connected.
- the foam generating device may be modular, so that the lower section can be removed and cleaned or replaced if necessary by a new one.
- a drain is provided in the first chamber section at a location upstream of the inlet.
- a liquid such as water.
- the process can be designed as a sump or just be arranged to the bottom surface of the foam generating device, so that no step between the bottom surface and the drain is created, which can be prevented that form residues that can not be flushed out.
- the bottom surface has a slight inclination and the drain is arranged at the lowest point or at the lowest edge of the bottom surface. This facilitates the rinsing and drainage of lime particles in the cleaning of the
- Chamber section arranged an overflow. This advantageously allows, in the Fill material existing, for example, stuck during the expiration process, lime particles to the upper end of the bed out beyond the bed
- an optionally disclosed overflow is provided in the flow direction between the second retaining means and the drain. This advantageously allows lime particles to be carried over the fill in the direction of flow and removed from the foam generator by the overflow.
- the overflow is lockable, so in the
- Foaming Mode The foam does not get into the overflow.
- Fig. 1 is a schematic representation of an inventive
- Fig. 2 is a schematic representation of a retaining means according to a first embodiment
- Fig. 3 is a schematic representation of a retaining means according to a second embodiment
- Fig. 4 is a schematic representation of an inventive
- Fig. 5 is a schematic representation of an inventive
- FIG. 1 shows a schematic representation of a foam generation device 1 in a first exemplary embodiment.
- the foam generating device 1 has a foam generating chamber 2 having a first chamber portion 2 a and a second chamber portion 2 b separated from each other by a first retaining means 4.
- a filling material in the form of a bed 3 of equal size balls is provided in the foam-generating chamber.
- a first retaining means 4 is provided in the form of a grid floor, which supports the balls of the bed 3.
- a feed 5 for a foamable liquid is provided, which usually consists of water, for example tap water, and a foamable detergent.
- a foamable liquid which usually consists of water, for example tap water, and a foamable detergent.
- Foam generating device 1 a feed device 6 is provided, via which a gas, for example air or compressed air, is introduced into the foam generating device 1. It is also conceivable that liquid and gas outside the foam generating device 1.
- Foam generating device 1 combined and already pre-mixed via a common feed line into the foam generating device 1 are fed.
- Foam generating device 1 mixed and under pressure
- a pump vertically guided in the direction of a downstream or above the bed 3 arranged outlet 7 in the form of a foam outlet opening.
- mixture foamable mixture of foamable liquid and gas
- the bed 3 wherein the mixture is sheared when flowing through the pores of the bed 3 and forms foam bubbles.
- Downstream or vertically above the bed 3 may be a second
- Retaining means 8 are located, which limits buoyancy of the balls from the bed 3. It can be determined by the height position of the second retaining means 8 in the Foam generating chamber 2 are determined how far the bed 3 can expand when flowing through the mixture or how compact the bed 3 is to be held when flowing through the mixture.
- the outlet 7 At the upper portion of the foam-generating chamber 2 (in the second chamber section 2b) is the outlet 7, from which the foam formed during the passage of the bed 3 leaves the foam-generating device 1. After the end of foaming /
- 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 the cleaning (of calcium deposits) of the first chamber section 2a.
- An exemplary embodiment of such a separation point 9 is a
- Detergent (foamable liquid / foam generating agent) is mixed and fed into the foam generator 1.
- tap water carries lime particles whose concentration may vary depending on the degree of water hardness.
- An alkaline agent also destabilizes the lime contained in the tap water, so that it crystallizes in the stationary water mixture (after interrupting the flow / shutdown of the pump).
- these lime particles especially if the
- Grid bars of the first retaining means 4 selected so that the balls of the bed 3 are retained and existing lime particles can fall through the distances between the bars through or can fall. Accumulating / caused by destabilization lime particles can thus fall after interrupting the flow / after switching off the pump in the stagnant water of the bed 3 and fall or fall to the bottom of the foam generating device. 1
- the outer dimensions of the first retaining means 4 at least cover or exceed the outer dimensions of the bed 3 so that all descending 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 grid bars may in principle have different cross sections, with a round cross section being particularly advantageous in order to minimize the bearing area for lime particles. Possibly in the bed 3 remaining lime particles can in the next flow through the bed 3 in the flow direction for
- the second retaining means 8 is of the same or 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 may pass the second retaining means 8.
- Fig. 2 shows a schematic structure of a first retaining means 4 in the form of a grid floor in a first embodiment.
- the bars do not cross each other and are arranged substantially parallel. Thus, the contact surface for lime particles is reduced to a minimum.
- Fig. 3 is a second
- Embodiment of a first retaining means 4 shown schematically in the form of a grid floor.
- the bars extend crosswise, which gives the grid floor more stability.
- Fig. 4 shows a schematic structure of an inventive
- Foam generating device 1 in a second embodiment.
- the second embodiment is similar in basic construction to the first embodiment, so that only differences will be discussed below. Notwithstanding the first
- Foaming chamber 2 below the first retaining means 4 a conical narrowing or a sump, so that the flow cross-section after
- Fig. 5 shows a schematic structure of an inventive
- Foam generating device 1 in a third embodiment.
- the third embodiment is similar in basic construction to the first embodiment, so that only differences will be discussed below. Notwithstanding the first
- the bottom of the foam generating device 1 is arranged obliquely, so that an edge region of the bottom (right side in the figure) is lower than the opposite edge region of the bottom (left side in the figure).
- a drain 10 is arranged at the lower edge region of the bottom.
- Inflow rate of the liquid is chosen or controlled so that the
- the first retaining means 4 is not reached.
- the gas supply is omitted during this rinsing process.
- the drain 10 is closed, for example via a controllable valve or a lid.
- Foam generating chamber 2 is provided, to which an overflow 1 1 (left side in the Fig.) Can be connected and which otherwise with a closure means, such as a plug 12, (right side in the Fig.) Is closed. This makes it possible to lime particles that are left in the bed 3, in
- Foam generating device 1 introduced and the bed 3 is flowed through.
- the lime particles remaining in the bed 3 are carried along in the flow direction of the liquid, and the foam generating device 1 can be carried along
- the inflow rate of the liquid is chosen so that the liquid level does not affect the outlet 7 reached.
- the opening is in the
- Foam generating chamber 2 to which the overflow 1 1 is connected closed, for example via a plug 12 or cover. It is also conceivable that an overflow 1 1 is permanently connected to the foam-generating chamber 2, and is closed during foam generation by a valve or other controllable closure means.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017115645.3A DE102017115645A1 (en) | 2017-07-12 | 2017-07-12 | Foam generating device for a vehicle treatment device |
PCT/EP2018/063915 WO2019011513A1 (en) | 2017-07-12 | 2018-05-28 | Foam generator for a vehicle treatment device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3651885A1 true EP3651885A1 (en) | 2020-05-20 |
EP3651885B1 EP3651885B1 (en) | 2021-09-22 |
Family
ID=62455473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18728106.8A Active EP3651885B1 (en) | 2017-07-12 | 2018-05-28 | Vehicle treatment device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3651885B1 (en) |
DE (1) | DE102017115645A1 (en) |
ES (1) | ES2900167T3 (en) |
WO (1) | WO2019011513A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110652893A (en) * | 2019-09-17 | 2020-01-07 | 李常德 | Microbubble generating device and bubble segmentation component |
FR3124095A1 (en) * | 2021-06-16 | 2022-12-23 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | FOAM PROJECTION NOZZLE |
FR3124097A1 (en) * | 2021-06-16 | 2022-12-23 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | AUTONOMOUS VISCOUS FOAM GENERATION DEVICE |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8034885U1 (en) * | 1980-12-31 | 1981-04-23 | Kränzle, Josef, 7918 Illertissen | FOAM GENERATING HEAD |
DE3328530A1 (en) * | 1983-08-06 | 1985-02-21 | Mathias 4815 Schloss Holte Mitter | Foam generator |
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 (en) | 2015-09-09 | 2017-04-27 | Washtec Holding Gmbh | foam generator |
-
2017
- 2017-07-12 DE DE102017115645.3A patent/DE102017115645A1/en not_active Withdrawn
-
2018
- 2018-05-28 WO PCT/EP2018/063915 patent/WO2019011513A1/en unknown
- 2018-05-28 ES ES18728106T patent/ES2900167T3/en active Active
- 2018-05-28 EP EP18728106.8A patent/EP3651885B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
ES2900167T3 (en) | 2022-03-16 |
WO2019011513A1 (en) | 2019-01-17 |
DE102017115645A1 (en) | 2019-01-17 |
EP3651885B1 (en) | 2021-09-22 |
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