EP2730344A1 - Procédé et dispositif destinés à supprimer une impureté d'une surface - Google Patents

Procédé et dispositif destinés à supprimer une impureté d'une surface Download PDF

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Publication number
EP2730344A1
EP2730344A1 EP13001640.5A EP13001640A EP2730344A1 EP 2730344 A1 EP2730344 A1 EP 2730344A1 EP 13001640 A EP13001640 A EP 13001640A EP 2730344 A1 EP2730344 A1 EP 2730344A1
Authority
EP
European Patent Office
Prior art keywords
dry ice
contaminant
turbine
mechanical removal
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13001640.5A
Other languages
German (de)
English (en)
Inventor
Rolf Heninger
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP2730344A1 publication Critical patent/EP2730344A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A46B13/04—Brushes with driven brush bodies or carriers power-driven carriers with reservoir or other means for supplying substances
    • A46B13/06—Brushes with driven brush bodies or carriers power-driven carriers with reservoir or other means for supplying substances with brush driven by the supplied medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/40—Cleaning tools with integrated means for dispensing fluids, e.g. water, steam or detergents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B08B7/0092—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by cooling

Definitions

  • the invention relates to a method for removing an impurity from a surface and to a corresponding device.
  • An efficient cleaning with dry ice is based on the combination of different effects, namely on the one hand on the cooling and embrittlement of the impurity by the low temperature of the CO 2 -air mixture, which is applied to the surface to be cleaned, and on the other hand on the associated thermal stresses which destroy the adhesion of the impurities on the surface. Furthermore, the kinetic energy of the impinging CO 2 particles causes the embrittled impurities to break up, whereby the gas impact by the compressed air and sublimating CO 2 finally lifts the respective impurity.
  • Disadvantages here are the comparatively high consumption of compressed air, which causes costs which are approximately at the same level as the costs for the CO 2 used , the noise generated by the compressed air and the handling made difficult by the compressed air hoses.
  • the object of the present invention is therefore to provide a method or a corresponding apparatus for removing an impurity from a surface, which is improved with regard to the aforementioned problem areas.
  • the respective impurity is preferably only subjected to dry ice for cooling and embrittlement of the impurity and the embrittled impurity is removed by mechanical removal with an additional means for mechanical removal.
  • Mechanical removal is understood, in particular, as acting on the contaminant, in which the agent is brought into contact with the contaminant and, for example, acts on it in an abrasive and / or impact-like manner.
  • the dry ice used to treat the surface is produced with a device which also has the additional means for mechanical removal.
  • the mechanical ablation means be moved through the device so that that agent can better act on it (e.g., abrasive and / or jarring) in contacting the contaminant.
  • liquid CO 2 is preferably expanded to produce a dry ice formation region of the said device in order to produce the dry ice, so that a mixture of dry ice and gaseous CO 2 is formed.
  • the agent can be set in rotation and pressed against the contaminant, so that the agent removes the contamination by abrasion.
  • the agent may be formed, for example, as a brush.
  • the means may be moved back and forth so that the agent, when pressed against the contaminant, impacts the contaminant.
  • the means may be formed as an impactor, which preferably has a comparatively small contact area for repeatedly contacting the contaminant, so that the greatest possible or sufficient pressure can be exerted on the contaminant.
  • the mixture is expanded in the dry ice formation region by means of a turbine, wherein the turbine is set in rotation, and in particular the means for mechanical removal is driven by means of the turbine.
  • said means for mechanically removing the contaminant is coupled to a shaft of the turbine so that said means, when rotating the turbine, e.g. is also rotated and thus due to the rotation in contacting with the contaminant can ablate them by abrasive action (see above).
  • the axis of rotation of this rotational movement preferably coincides with the longitudinal axis of the shaft or the device along which the dry ice produced is also exposed to the contaminant or the surface.
  • the means for the mechanical removal of the contamination may have a passage opening through which the dry ice can be directed onto the surface to be cleaned.
  • said means for removing the contamination is driven by a separate drive.
  • a separate drive can be designed to rotate the said means about an axis of rotation, which in particular coincides with or runs parallel to the longitudinal axis of the device, wherein said means is preferably designed as a brush.
  • such a separate drive may also be adapted to reciprocate the means for mechanically removing the contaminant along the longitudinal axis of the device so that said means may impact the surface (such a drive is also known as impactor designated).
  • said means is preferably designed as an impactor (see above).
  • a method for producing dry ice wherein the dry ice in particular a surface is acted upon, in particular to cool contamination of the surface and / or embrittle, and wherein in a dry ice formation area, a mixture of dry ice snow and gaseous CO 2 is generated, in particular by relaxing liquid CO 2 in the dry ice formation area, and wherein said mixture is expanded with a turbine.
  • the device is designed to produce dry ice and expel from a nozzle of this device for embrittlement of the contaminant, wherein according to the invention, the device in addition to the nozzle has a movable in particular relative to the nozzle means for mechanical removal of embrittled contaminant.
  • Such a device is preferably provided for use in a method according to the invention.
  • the device is designed to introduce liquid CO 2 into a dry ice formation region of the device for generating the dry ice, so that a mixture of that dry ice and gaseous CO 2 is formed.
  • the device is in this respect adapted to use that mixture for driving or moving the means for mechanical removal.
  • the device preferably has a turbine which is preferably arranged in the dry ice formation region and which is formed by a shaft from which turbine blades exit.
  • This turbine is preferably coupled to that means for driving the mechanical abrasion means, preferably via the shaft of the turbine, the apparatus being preferably adapted to connect the turbine or turbine blades to said mixture of dry ice and gaseous CO 2 Driving the turbine to apply.
  • the turbine expands said mixture and at least partially converts the energy in the mixture into kinetic energy of the turbine available for driving said agent.
  • a separate drive may be provided for driving said means for mechanically removing the respective contaminant.
  • a drive like the previously described turbine, can be designed to set said means into a rotational movement, wherein preferably the axis of rotation of this movement coincides with the shaft of the turbine.
  • a mechanical abrasion means it is preferably formed as a brush which, when rotated, is abraded against the respective brittle contaminant when the device is pressed along the axis of rotation against the surface or contaminant.
  • a separate drive for driving the means for mechanical removal may, for example, be a motor, for example an electric motor or another actuator.
  • such a separate drive can be designed as a striking mechanism, which moves the means for mechanically removing the contamination back and forth so that it can impact on the contaminant or the surface to be cleaned, said back and forth movement along one Direction takes place along which preferably the dry ice produced is directed to the surface to be cleaned.
  • a means for mechanical action or removal of the respective contamination is also referred to as an impactor.
  • said means for mechanically removing the contaminant is along an ejection direction along which the dry ice passes through an exit port the nozzle is expelled from the device, located in front of the outlet opening, said mechanical removal means preferably having a passage opening in alignment with the outlet opening so that the dry ice expelled from the outlet opening passes through the through opening of said means to be cleaned Surface or contamination can be given.
  • Fig. 1 1 shows an embodiment of a device 10 according to the invention for cleaning a surface O or for removing contaminants V of a surface O, wherein the dry ice used according to the invention preferably has only the function of cooling or embrittlement of the respective contaminant.
  • the impurity in question is thus not removed in particular by the gas impact of the CO 2 or a compressed air usually used, but by a mechanical component, for example in the form of a brush 5 (see. Fig. 1 and 2 ) or an impactor 5 (cf. Fig. 3 ).
  • This means 5 for the mechanical removal of the respective contaminant V is combined with a dry ice forming region 30 for the production the dry ice used for embrittlement, which is connected to a nozzle 8 of the device 10, wherein in the dry ice forming region 30 liquid CO 2 is expanded and the resulting mixture of dry ice and gaseous CO 2 is directed via the nozzle 8 onto the surface to be cleaned O.
  • FIG. 1 An embodiment of such a device 10 is in the Fig. 1 shown. Thereafter, the liquid CO 2 is passed via a feed line 1 into the dry ice forming region 30 of the device 10, which is enclosed by a particular cylindrical shell 30 and extends along a longitudinal axis or cylinder axis L, wherein the liquid CO 2 preferably transverse to the longitudinal axis L in the dry ice formation area 30 is introduced.
  • a turbine 2 is arranged which has a shaft 4 arranged coaxially with the longitudinal axis L, from which turbine blades 20 are impinged by the mixture produced in the dry ice formation area 30, which has a certain flow pressure, so that the turbine 2 is set in rotation about a rotation axis which coincides with said longitudinal axis L or shaft 4 of the device 10. In this case, said mixture is expanded.
  • the mixture is then supplied from the dry ice formation region 30, which may be provided at an end portion 80 of the shell 3 nozzle 8, which may be formed as a Laval nozzle, and via an outlet opening 6 of the nozzle 8, which is provided on the front end portion 80 of the shell 3 on the surface O to be cleaned is ejected along a discharge direction running parallel to the longitudinal axis L, so that an impurity V to be removed from the surface can be embrittled with the ejected dry ice.
  • the turbine 2 is further coupled via its shaft 4 to a means 5 for mechanical removal of the embrittlement V to be embrittled, said means 5 according to Fig. 1 is designed as a brush 5.
  • the coupling is designed in such a way that the brush 5 is set in rotation about a rotation axis which coincides with the shaft 4 of the turbine 2 or the longitudinal axis L of the jacket 3 of the device 10.
  • the said means 5 is arranged along the longitudinal axis L or the ejection direction in front of the outlet opening 6, so that the means 5 is opposite to that outlet opening 6 along the longitudinal axis L.
  • Said means 5 therefore preferably has a passage opening 5a, which is aligned with the outlet opening 6, so that the ejected from the outlet opening 6 dry ice can be passed through the passage opening 5a of the means 5 on the surface O to be cleaned.
  • a flywheel 7 is provided, which is connected to one end of the shaft 4 of the turbine 2 and the said turbine 2 gives a corresponding moment of inertia.
  • the turbine 2 is designed as an axial turbine.
  • a radial turbine for driving the brush 5 can be used.
  • the axis of rotation of the turbine 2 or its shaft is perpendicular to the longitudinal axis L.
  • a turbine 2 can in the embodiments according to Fig. 2 and 3 the CO 2 are respectively expanded only through the nozzle 8, wherein the means 5 for the mechanical removal of the embrittled contaminant V by means of a separate drive 9 is driven.
  • a brush 5 in the manner of Fig. 1 is driven by a separate drive 9 in the form of a motor which acts on a shaft 4 which is coupled to the brush 5 as described above, so that the shaft 4 is rotated together with the brush 5 in rotation.
  • the separate drive 9 is provided preferably formed as a percussion mechanism 9, which reciprocates a rod 40, which extends along the longitudinal axis L of the device 10 along the longitudinal axis L, so that the attached to one end of the rod 40 means 5 is taken accordingly and thus at Approaching the surface O or the contaminant V adhering thereto may act on it in order to remove it.
  • inventive expansion by a turbine and the associated increase in the production of solid CO 2 can also be used for other applications, for example for freezing foods, for covering molten metal in metallurgy and the like.

Landscapes

  • Cleaning In General (AREA)
EP13001640.5A 2012-11-08 2013-03-28 Procédé et dispositif destinés à supprimer une impureté d'une surface Withdrawn EP2730344A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012021964.4A DE102012021964A1 (de) 2012-11-08 2012-11-08 Verfahren und Vorrichtung zum Entfernen einer Verunreinigung von einer Oberfläche

Publications (1)

Publication Number Publication Date
EP2730344A1 true EP2730344A1 (fr) 2014-05-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13001640.5A Withdrawn EP2730344A1 (fr) 2012-11-08 2013-03-28 Procédé et dispositif destinés à supprimer une impureté d'une surface

Country Status (2)

Country Link
EP (1) EP2730344A1 (fr)
DE (1) DE102012021964A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017134033A1 (fr) * 2016-02-01 2017-08-10 Autostore Technology AS Bac de nettoyage pour nettoyer une grille de stockage d'un système de stockage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016206246A1 (de) * 2016-04-14 2017-10-19 Lufthansa Technik Ag Verfahren und Vorrichtung zur Reinigung von Turbinenschaufeln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946957C1 (de) * 1999-09-30 2001-02-01 Messer Griesheim Gmbh Vorrichtung und Verfahren zum Entfernen einer Beschichtung von einem Substrat
WO2005054672A1 (fr) * 2003-12-04 2005-06-16 Pp Energy Aps Procede et appareil pour le traitement d'une partie d'une eolienne
DE102004028924A1 (de) * 2004-06-15 2006-01-05 Szatmári, Ferenc Verfahren zum Entfernen klebriger und/oder zäher Massen und Anordnung hierfür
WO2006011029A1 (fr) * 2004-07-20 2006-02-02 Dirk Leon Erasmus Accessoire a main rotatif mu par turbine hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946957C1 (de) * 1999-09-30 2001-02-01 Messer Griesheim Gmbh Vorrichtung und Verfahren zum Entfernen einer Beschichtung von einem Substrat
WO2005054672A1 (fr) * 2003-12-04 2005-06-16 Pp Energy Aps Procede et appareil pour le traitement d'une partie d'une eolienne
DE102004028924A1 (de) * 2004-06-15 2006-01-05 Szatmári, Ferenc Verfahren zum Entfernen klebriger und/oder zäher Massen und Anordnung hierfür
WO2006011029A1 (fr) * 2004-07-20 2006-02-02 Dirk Leon Erasmus Accessoire a main rotatif mu par turbine hydraulique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017134033A1 (fr) * 2016-02-01 2017-08-10 Autostore Technology AS Bac de nettoyage pour nettoyer une grille de stockage d'un système de stockage
EP3643413A1 (fr) * 2016-02-01 2020-04-29 Autostore Technology AS Caisse nettoyante pour nettoyer une grille de stockage d'un systeme de stockage
US10654661B2 (en) 2016-02-01 2020-05-19 Autostore Technology AS Cleaning bin for cleaning a storage grid of a storage system
US11104522B2 (en) 2016-02-01 2021-08-31 Autostore Technology AS Cleaning bin for cleaning a storage grid of a storage system

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Publication number Publication date
DE102012021964A1 (de) 2014-05-22

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