EP0509132A1 - Méthode et dispositif pour le nettoyage de surfaces, en particulier de surfaces délicates - Google Patents

Méthode et dispositif pour le nettoyage de surfaces, en particulier de surfaces délicates Download PDF

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Publication number
EP0509132A1
EP0509132A1 EP91114993A EP91114993A EP0509132A1 EP 0509132 A1 EP0509132 A1 EP 0509132A1 EP 91114993 A EP91114993 A EP 91114993A EP 91114993 A EP91114993 A EP 91114993A EP 0509132 A1 EP0509132 A1 EP 0509132A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
jet
cleaning
nozzle
liquid
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
EP91114993A
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German (de)
English (en)
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EP0509132B1 (fr
Inventor
Johan Szücs
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.)
Brau Peter
Szuecs Eva Abony
Original Assignee
Brau Peter
Szuecs Eva Abony
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 Brau Peter, Szuecs Eva Abony filed Critical Brau Peter
Priority to JP4098322A priority Critical patent/JPH05115853A/ja
Priority to US07/870,144 priority patent/US5318636A/en
Publication of EP0509132A1 publication Critical patent/EP0509132A1/fr
Application granted granted Critical
Publication of EP0509132B1 publication Critical patent/EP0509132B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2

Definitions

  • the invention relates to a method and a device for cleaning surfaces, in particular sensitive surfaces, which are contaminated by environmental influences.
  • the process described here represents a further development of the cleaning process for surfaces in accordance with European Patent No. 0 171 448.
  • blasting material a substance suitable as blasting material
  • sharp-edged blasting material such as sand (a silicon compound), quartz, corundum or fly ash.
  • sand a silicon compound
  • quartz a silicon compound
  • corundum a substance suitable as blasting material
  • These blasting materials are combined in the form of a blasting material / air jet in a mixing head with an air / water jet to form an overall jet which is self-rotating.
  • the atomized total jet emerging from the mixing head which resembles a cone rotating about its central axis and spreading in the direction of beam propagation, is directed onto the surface to be cleaned.
  • a method and a device are to be proposed which enable a thorough and gentle, and preferably environmentally friendly cleaning of sensitive surfaces and which can be implemented with the least possible outlay on equipment.
  • the advantage of the invention is to be seen in the fact that the use of mineral blasting material can be dispensed with, in that a liquid cleaning agent, usually this is water, crystallizes into small, finely divided particles by cooling and is used as blasting material. Initial preliminary tests have shown very good cleaning results. At the same time, the entry of environmentally harmful substances, especially into the wastewater, can be reduced to a minimum. If, as will be the case in the majority of applications, water is used as a cleaning agent, the environmental impact is minimal. It is also no longer necessary to rinse off the blasting material particles from a cleaned surface, since the crystals melt and the molten liquid flows away.
  • a liquid cleaning agent usually this is water
  • the removal of dirt layers on surfaces to be cleaned is brought about by a cleaning jet which essentially contains finely divided ice crystals.
  • a cleaning jet which essentially contains finely divided ice crystals.
  • any crystallization-compatible cleaning agent or mixture of cleaning agent and water suitable for the cleaning purpose can be used.
  • the necessary crystal particles are generated by cooling water or another suitable liquid cleaning agent. If in the following only water or ice particles are mentioned for the sake of simplicity, this is intended to include other suitable liquid cleaning agents and their crystal particles.
  • the term mixed jet is also used in the case of a simple water jet to indicate that the jet can also be formed by several different blasting material according to the invention.
  • the cooling and subsequent crystallization of the water into ice crystals can take place both in front of the mixing head, for example a spray gun, and in the mixing head or in a particularly advantageous manner behind the mixing head, namely within the mixture jet emerging from the nozzle area of the mixing head and already atomized .
  • ice crystals are already generated prior to atomization, i.e. ice crystals are already supplied to the mixing head or are generated there directly, for example by adding a refrigerant - in liquid form or in the form of another suitable compressed gas instead of compressed air - to the mixing area of the mixing head, there are preliminary tests have shown the danger that ice forms in the nozzle area of the mixing head, which hinders the passage of the mixture jet.
  • An effective remedy is to locally heat this nozzle area, in particular its wall.
  • the refrigerant can be introduced in gaseous or liquid form into the mixture jet containing the atomized liquid particles, with carbon dioxide and freons, for example carbon dioxide and freons, having proven themselves as gaseous refrigerants for this purpose, in particular with water.
  • Particularly good results are achieved by introducing, particularly by spraying, liquid refrigerant into the mixture jet.
  • Liquid refrigerants are ideal, especially liquid nitrogen, which is widely used as an industrial refrigerant. The associated technology is mature, the handling of the nitrogen is therefore easy, the refrigerant itself is comparatively inexpensive and easily available. Another advantage is that nitrogen does not cause disposal problems.
  • the nitrogen injected liquid into the mixture jet has completely evaporated during the crystallization of the cleaning particles. The same good test results can also be expected when using other, suitable liquid refrigerants, although it may be necessary to cut back on environmental compatibility.
  • the jet is preferably acted upon from the outside with the gaseous refrigerant, since in this case the jet cannot be broken open, for example by a refrigerant supply line leading into the jet. It has proven to be expedient to let the refrigerant emerge from nozzles arranged in a ring around the mixture jet, but a single nozzle has already proven to be completely sufficient and is even a preferred embodiment.
  • the nozzle area of the mixing head is included Ring piece on, which is provided according to the invention with at least one refrigerant nozzle.
  • the cleaning jet emerging and preferably rotating from the nozzle area is guided through the ring piece, the passage of which widens conically in the jet direction, but according to the invention can also be designed as a passage with a constant diameter. In adaptation to the nozzle area of the mixing head, this diameter can be between 5 and 20 mm.
  • the refrigerant nozzles have a refrigerant passage which is both conical in shape and - and this is a preferred embodiment of the invention - can in turn be designed as a simple through hole.
  • the central axis of this refrigerant passage extends at an angle of 30 ° to 60 °, preferably at an angle of approximately 45 °, to the central axis of the cleaning jet in the jet direction.
  • the passage of the refrigerant nozzle or nozzles is designed as a simple bore, its diameter is preferably between 2 and 5 mm.
  • the outlet of the nozzle passage is 10 to 30 mm, advantageously 20 to 25 mm, based on the central axis of the nozzle passage, from the nozzle outlet of the mixing head.
  • rotating Cleaning jet which is a very particularly preferred combination with the method according to the invention, its rotational energy can be increased as a result of the inclined refrigerant nozzle or asymmetrically arranged refrigerant nozzles, to which the reflected refrigerant jets can make an additional contribution.
  • a further increase in the rotational energy could be achieved according to the invention by a refrigerant nozzle arranged eccentrically to the central axis of the cleaning jet.
  • the eccentricity should not be more than 1.5 mm.
  • a ring piece is provided which is arranged at a distance of 3 to 7 cm, preferably of about 5 cm, from the nozzle opening of the mixing head.
  • the method described above is not limited to the exclusive use of ice crystals or crystal particles of another suitable cleaning agent, but also allows the use of a mixture of crystal particles and mineral blasting material, such as dolomite dust or ground walnut kernels, in a further expedient embodiment of the invention .
  • the admixture can have a targeted influence on the particle size distribution of the blasting material, for example by the admixture containing precisely those particle sizes which cannot be produced in the course of the cooling and crystallization of water or another cleaning agent. It is an effect known from the prior art that the use of grains of different sizes leads to a better cleaning effect than that of grains of the same size.
  • the invention is not restricted to a cleaning method with rotating cleaning jets, although this represents a particularly preferred embodiment. Rather, it also relates to other generic cleaning methods, for example also those in which the cleaning jet reaches the surface to be cleaned in an approximately straight path.
  • the device shown in FIG. 4 which is generally referred to as a mixing head 10 and is suitable for carrying out the method according to the invention, has two pipe sockets with central axes 12 and 14 on the feed side, through which the jet components are introduced into the mixing head 10.
  • a pressurized mixture of atomized water and air is fed to a mixing area 16 of the mixing head 10 and compressed air along the axis 14.
  • the pressure conditions in the two pipe sockets and in the mixing area 16 are adapted to the respective application.
  • Both pipe sockets can be supplied with compressed air either by their own or by a common compressed air source.
  • the two partial jets mix to form an overall jet which, as is described in EP-PS 0 171 448, is set into a rotational movement due to the type of beam merging and the geometry of the mixing area 16.
  • This total jet then spreads out conically along a central cone axis 20 as it emerges from a nozzle area 18 of the mixing head 10 and strikes the surface 22 of an object to be cleaned.
  • FIGS. 1 and 2 An arrangement 30 is shown in FIGS. 1 and 2, which is placed on the mixing head 10 and via which liquid, gaseous or liquid / gaseous - mixed refrigerant 36 is blown into the spreading rotating cleaning jet 19.
  • Gaseous refrigerant is fed from a refrigerant reservoir 44 via a regulating valve 42 and a feed line 40 to a ring piece 32 and via refrigerant nozzles 34 distributed uniformly, namely at equal angular intervals along the ring piece 32 blown from the outside into the conically spreading cleaning jet 19.
  • the ring piece 32 has spokes 38 which protrude radially inward from the ring piece 32 and whose ends opposite the ring piece 32 are in turn connected by means of a fastening ring 46.
  • This fastening ring 46 is screwed onto the outside of the nozzle region 16 of the mixing head 10 by means of screws 48 with pointed ends.
  • the outside of the mixing head 10 is made of plastic, so that a simple connection results from a very good connection.
  • the ring-shaped arrangement of the refrigerant nozzles 34 outside the conical cleaning jet 19 avoids any undesirable influencing of the jet 19 in terms of equipment.
  • the refrigerant jets 36 are directed onto the mixture jet 19 at a distance of 5 to 10 cm from the nozzle outlet 50 of the mixing head 10.
  • the distance of the tube 32 from the nozzle outlet 50 to approximately 5 cm and the angle at which the refrigerant jets 36 strike the central axis 20 of the mixture jet 19 are selected to be approximately 45 °.
  • An angle that is too obtuse for example an angle greater than 60 °, would constrict the mixture jet too much and moreover impair the rotational movement of its particles excessively, while an angle that is too acute, less than 30 °, reduces the intensity of the heat exchange.
  • the ring piece 32 directly adjoins the nozzle area 18 of the mixing head 10.
  • Both the nozzle area 18 of the mixing head 10 and the passage 60 of the ring piece 32 have a circular cylindrical cross section.
  • the diameter of the passage 60 is approximately 12 mm with a length of approximately 30 mm. It is not imperative that the cross section of the passage 60 is larger than that of the nozzle area 18, as shown in Fig. 3. However, it should not be smaller.
  • a single refrigerant nozzle 34 with a bore 35 serving as a refrigerant passage, to which liquid nitrogen can be supplied as a refrigerant via the bore widening 41.
  • the approximately 35 mm wide bore 35 extends at an angle ⁇ of approximately 45 ° to the central axis 20 of the cleaning jet 19 inclined in the jet direction.
  • the angle of inclination ⁇ can be between 30 ° and 60 °.
  • the central axis 39 of the bore 35 intersects the central axis 20 of the cleaning jet 19 and, at point A, meets the wall of the ring piece 32 opposite the bore 35.
  • the outlet of the refrigerant nozzle 34 is arranged directly adjacent to the cleaning jet 19.
  • the refrigerant in this case liquid nitrogen, thus comes into direct contact with the particles to be crystallized.
  • heat insulation in the form of a heat-insulating ring 21 is provided, which additionally serves to protect the casing 9, which is made of a plastic material, of the nozzle area 18 lined with a ceramic material 8.
  • the ring piece 32 is fastened to the casing 9 of the mixing head 10 by means of spokes or struts 38.
  • the ring piece 32 is made of a rustproof and cold-tolerant material, such as stainless steel (VA steel).
  • a possible addition of mineral blasting material to the cleaning jet can finally, as described in detail in European Patent No. 0 171 448, take place in that a blasting material / air mixture is supplied via the pipe socket 14 instead of compressed air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
EP91114993A 1991-04-19 1991-09-05 Méthode et dispositif pour le nettoyage de surfaces, en particulier de surfaces délicates Expired - Lifetime EP0509132B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4098322A JPH05115853A (ja) 1991-04-19 1992-04-17 鋭敏な表面を洗浄する方法および装置
US07/870,144 US5318636A (en) 1991-04-19 1992-04-17 Method for cleaning surfaces, in particular sensitive surfaces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112890A DE4112890A1 (de) 1991-04-19 1991-04-19 Verfahren und vorrichtung zum reinigen von oberflaechen, insbesondere von empfindlichen oberflaechen
DE4112890 1991-04-19

Publications (2)

Publication Number Publication Date
EP0509132A1 true EP0509132A1 (fr) 1992-10-21
EP0509132B1 EP0509132B1 (fr) 1995-08-23

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EP91114993A Expired - Lifetime EP0509132B1 (fr) 1991-04-19 1991-09-05 Méthode et dispositif pour le nettoyage de surfaces, en particulier de surfaces délicates

Country Status (4)

Country Link
EP (1) EP0509132B1 (fr)
AT (1) ATE126747T1 (fr)
DE (2) DE4112890A1 (fr)
DK (1) DK0509132T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631847A1 (fr) * 1993-06-14 1995-01-04 International Business Machines Corporation Dispositif à buse pour la production d'aérosols
EP0633098A1 (fr) * 1993-06-14 1995-01-11 International Business Machines Corporation Dispositif de production d'aérosol cryogénique
NL9301237A (nl) * 1993-07-14 1995-02-01 Harko Bv Werkwijze voor het bewerken van oppervlakken met cryogene deeltjes.
WO2000047938A1 (fr) * 1999-02-12 2000-08-17 Cetek Limited Procede de nettoyage mettant en application des lances a souder et des agents decapants
FR2837122A1 (fr) * 2002-03-15 2003-09-19 Aero Strip Procede de decapage de pieces en materiau metallique ou composite, recouvertes d'un revetement et dispositif pour la mise en oeuvre du procede
WO2006005377A1 (fr) * 2004-07-13 2006-01-19 Jens Werner Kipp Procede et dispositif pour generer un jet de particules de neige carbonique
EP1649971A1 (fr) * 2003-07-17 2006-04-26 Availvs Corporation Dispositif et procede pour la decoupe de surfaces par projection de jets d'eau sous haute pression

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320410A1 (de) * 1993-06-21 1994-12-22 Ghibli Hochdruck Ag Verfahren und Vorrichtung zum Reinigen von Oberflächen
DE19639437A1 (de) * 1996-09-25 1998-04-02 Siemens Ag Verfahren zur Behandlung von metallischen Oberflächen in einem Relais
AT411233B (de) * 1999-05-07 2003-11-25 Berndorf Band Ges M B H Vorrichtung mit zumindest einem endlosen band aus stahl und verfahren zum thermischen beaufschlagen von plastischen massen
DE10233304B4 (de) * 2002-07-22 2005-11-10 Unique Cleaning Systems Gmbh Verfahren und Vorrichtung zum Entfernen von Dünnfilm- und Dünnschicht-Verschmutzungen auf festen Oberflächen
DE10322063A1 (de) * 2003-01-24 2004-08-05 Werner Valder Verfahren und Vorrichtung zum Reinigen von Kraftfahrzeugteilen sowie Verwendung eines Hochdruckreinigungsgerätes
DE102007039540A1 (de) * 2007-08-21 2009-02-26 Jens Wilkowski Verfahren zur Reinigung eines Kanalsystems von Klima- und Fettabluftkanälen
DE102010020618B4 (de) 2009-05-26 2014-05-28 Jürgen von der Ohe Verfahren zur Herstellung von CO2-Pellets oder von CO2-Partikeln mit erhöhter mechanischer Härte und Abrasivität

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FR791688A (fr) * 1934-06-27 1935-12-14 Esslingen Maschf Procédé et dispositif de solidification ou de refroidissement des liquides et en particulier de l'eau
FR2375901A1 (fr) * 1976-12-30 1978-07-28 Messerschmitt Boelkow Blohm Procede pour la preparation de granules congeles
GB2042399A (en) * 1979-01-15 1980-09-24 Boc Ltd Method and apparatus for penetrating a body of material or treating a surface
FR2494160A1 (fr) * 1980-11-17 1982-05-21 Chausson Usines Sa Procede et dispositif pour le traitement d'objets par abrasion, notamment d'objets peints, et son application au traitement de depolissage de carrosseries de vehicules
GB2145643A (en) * 1983-09-01 1985-04-03 Ishikawajima Harima Heavy Ind Method and apparatus for cleaning by abrasive blasting
EP0171448A1 (fr) * 1984-08-14 1986-02-19 Johann Szücs Dispositif et procédé pour le nettoyage de surfaces métalliques et en pierre
EP0192088A1 (fr) * 1985-02-19 1986-08-27 Ernst Manfred Küntzel GmbH Malereibetrieb Procédé de décapage de surfaces
EP0266859A1 (fr) * 1986-10-06 1988-05-11 Taiyo Sanso Co Ltd. Procédé et dispositif pour la production de particules congelées microfines
EP0316264A2 (fr) * 1987-11-11 1989-05-17 Werner & Zeisse GmbH & Co. Procédé et dispositif pour le dévernissage et l'enlèvement de couches de surfaces
FR2627121A1 (fr) * 1988-02-12 1989-08-18 Carboxyque Francaise Procede, installation et buse de projection pour le traitement de pieges par soufflage de grenaille
DE3937221A1 (de) * 1988-11-11 1990-05-17 Mitsubishi Electric Corp Reinigungsvorrichtung fuer festkoerperoberflaechen

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DE954849C (de) * 1954-10-26 1956-12-20 Stahl Und Walzwerke Rasselstei Verfahren zum Entfetten von gewalztem Bandstahl vor der Gluehbehandlung
DE2003673C3 (de) * 1970-01-28 1973-10-18 Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen Herd mit einem Träger für das zu behandelnde Gut
US3676963A (en) * 1971-03-08 1972-07-18 Chemotronics International Inc Method for the removal of unwanted portions of an article
GB1481042A (en) * 1974-06-05 1977-07-27 Hart B Guns for forming jets of particulate material
US4038786A (en) * 1974-09-27 1977-08-02 Lockheed Aircraft Corporation Sandblasting with pellets of material capable of sublimation
US4125969A (en) * 1977-01-25 1978-11-21 A. Long & Company Limited Wet abrasion blasting
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JPH03116832A (ja) * 1989-09-29 1991-05-17 Mitsubishi Electric Corp 固体表面の洗浄方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR791688A (fr) * 1934-06-27 1935-12-14 Esslingen Maschf Procédé et dispositif de solidification ou de refroidissement des liquides et en particulier de l'eau
FR2375901A1 (fr) * 1976-12-30 1978-07-28 Messerschmitt Boelkow Blohm Procede pour la preparation de granules congeles
GB2042399A (en) * 1979-01-15 1980-09-24 Boc Ltd Method and apparatus for penetrating a body of material or treating a surface
FR2494160A1 (fr) * 1980-11-17 1982-05-21 Chausson Usines Sa Procede et dispositif pour le traitement d'objets par abrasion, notamment d'objets peints, et son application au traitement de depolissage de carrosseries de vehicules
GB2145643A (en) * 1983-09-01 1985-04-03 Ishikawajima Harima Heavy Ind Method and apparatus for cleaning by abrasive blasting
EP0171448A1 (fr) * 1984-08-14 1986-02-19 Johann Szücs Dispositif et procédé pour le nettoyage de surfaces métalliques et en pierre
EP0192088A1 (fr) * 1985-02-19 1986-08-27 Ernst Manfred Küntzel GmbH Malereibetrieb Procédé de décapage de surfaces
EP0266859A1 (fr) * 1986-10-06 1988-05-11 Taiyo Sanso Co Ltd. Procédé et dispositif pour la production de particules congelées microfines
EP0316264A2 (fr) * 1987-11-11 1989-05-17 Werner & Zeisse GmbH & Co. Procédé et dispositif pour le dévernissage et l'enlèvement de couches de surfaces
FR2627121A1 (fr) * 1988-02-12 1989-08-18 Carboxyque Francaise Procede, installation et buse de projection pour le traitement de pieges par soufflage de grenaille
DE3937221A1 (de) * 1988-11-11 1990-05-17 Mitsubishi Electric Corp Reinigungsvorrichtung fuer festkoerperoberflaechen

Non-Patent Citations (1)

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Title
COMPRESSED AIR MAGAZINE August 1986, Seiten 22 - 25; 'Cleaning Surfaces with Dry Ice' *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631847A1 (fr) * 1993-06-14 1995-01-04 International Business Machines Corporation Dispositif à buse pour la production d'aérosols
EP0633098A1 (fr) * 1993-06-14 1995-01-11 International Business Machines Corporation Dispositif de production d'aérosol cryogénique
EP0712693A1 (fr) * 1993-06-14 1996-05-22 International Business Machines Corporation Dispositif à base pour la production d'aérosols
EP0712691A1 (fr) * 1993-06-14 1996-05-22 International Business Machines Corporation Dispositif de production d'aérosol cryogénique
NL9301237A (nl) * 1993-07-14 1995-02-01 Harko Bv Werkwijze voor het bewerken van oppervlakken met cryogene deeltjes.
WO2000047938A1 (fr) * 1999-02-12 2000-08-17 Cetek Limited Procede de nettoyage mettant en application des lances a souder et des agents decapants
FR2837122A1 (fr) * 2002-03-15 2003-09-19 Aero Strip Procede de decapage de pieces en materiau metallique ou composite, recouvertes d'un revetement et dispositif pour la mise en oeuvre du procede
EP1649971A1 (fr) * 2003-07-17 2006-04-26 Availvs Corporation Dispositif et procede pour la decoupe de surfaces par projection de jets d'eau sous haute pression
EP1649971A4 (fr) * 2003-07-17 2008-07-02 Availvs Corp Dispositif et procede pour la decoupe de surfaces par projection de jets d'eau sous haute pression
WO2006005377A1 (fr) * 2004-07-13 2006-01-19 Jens Werner Kipp Procede et dispositif pour generer un jet de particules de neige carbonique
US7708620B2 (en) 2004-07-13 2010-05-04 Jens Werner Kipp Method and device for generating dry ice particles

Also Published As

Publication number Publication date
DE4112890A1 (de) 1992-10-22
ATE126747T1 (de) 1995-09-15
DK0509132T3 (da) 1995-09-25
DE59106320D1 (de) 1995-09-28
EP0509132B1 (fr) 1995-08-23

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