EP1582295B1 - Méthode a faible impact environnemental et appareil pour le nettoyage des surfaces minérales - Google Patents

Méthode a faible impact environnemental et appareil pour le nettoyage des surfaces minérales Download PDF

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Publication number
EP1582295B1
EP1582295B1 EP05004420A EP05004420A EP1582295B1 EP 1582295 B1 EP1582295 B1 EP 1582295B1 EP 05004420 A EP05004420 A EP 05004420A EP 05004420 A EP05004420 A EP 05004420A EP 1582295 B1 EP1582295 B1 EP 1582295B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
stony
water
sodium bicarbonate
cleaning substance
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
EP05004420A
Other languages
German (de)
English (en)
Other versions
EP1582295A1 (fr
Inventor
Alessandro Bertin
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.)
DEKOS Srl
Original Assignee
DEKOS Srl
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Filing date
Publication date
Application filed by DEKOS Srl filed Critical DEKOS Srl
Publication of EP1582295A1 publication Critical patent/EP1582295A1/fr
Application granted granted Critical
Publication of EP1582295B1 publication Critical patent/EP1582295B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0076—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier the blasting medium being a liquid stream
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed

Definitions

  • the present invention relates to a method for cleaning stony surfaces and the like, with a low or small environment impact, and to an apparatus suitable for this method.
  • sulphur dioxide is the main responsible of urban and historical degradation.
  • microcracks are generated which, during icing and thawing cycles, because of an expansion and shrinking action, increase the thickness and depth of the mentioned microcracks.
  • the atmospheric environment further comprises solid particle materials such as silicas, crystal sands and so on, subjecting the surfaces to an abrading action, with a consequent erosion of the exposed materials, which loose their surface resistance starting characteristics.
  • solid particle materials such as silicas, crystal sands and so on
  • the cleaning is conventionally performed by mechanical or chemical types of methods.
  • a mechanical cleaning method provides to use abrasive wheels, sanding machines, hydrosanding devices, hydrocleaners, carbon dioxide apparatus, as for example, in US-A-5509971 or US-A-5588901 disclosed.
  • Chemical cleaning systems or methods conventionally provide to use interacting paint removing and cleaning materials, mainly consisting of solvents and surface active agent mixtures, which, mainly because the presence of the solvent, make difficult to properly control the environment ejection, thereby they cannot be used in a free environment and without a recovery possibility.
  • the presence of organic compounds can originate undesired actions inside the stony object, thereby changing the original composition thereof.
  • the aim of the present invention is to overcome the above mentioned problem, by providing a method and an apparatus for cleaning stony surfaces and the like, with a low environment impact, allowing to associate mechanical and chemical activities, thereby preventing any environment impact deriving from an use of dangerous volatile products.
  • a main object of the present invention is to provide such a cleaning method which does not mechanically damage the surfaces being processed because of abrasion phenomena.
  • Another object of the present invention is to provide such a cleaning method requiring a small operating power with a very reduced environment impact deriving from noise and used products, thereby said method can be carried out without the need of taking specific application protective measurements.
  • Another object of the present invention is to provide such a cleaning method which, owing to its specifically designed features, is very reliable and safe in operation.
  • Yet another object of the present invention is to provide such a cleaning method which can be easily carried out and which, moreover, is very competitive from a mere economic standpoint.
  • the method for cleaning stony surfaces and the like, with a low environment impact comprises the step of ejecting, at a low pressure, on the surface to be processed, a solution comprising water and a mildly abrasive cleaning substance thereby providing a physical and chemical action suitable to remove atmospheric particle materials, paint layers and mass deposits such as alimentary gums and the like.
  • Another mixture which could be used would comprise sodium bicarbonate, calcium carbonate, magnesium carbonate and silica oxide in an amount less than 0-1%.
  • a further mixture which could be used, and having a controlled particle size, would comprise mineral materials free of silica and quartz, in particular calcium and magnesium compounds.
  • a taking nozzle 2 is provided, forming a Venturi element, thereon is coupled an air delivery branch 3, having a main branch 4 communicating with a delivery nozzle 10 to which is further connected the powder inlet duct 11.
  • a mouth or inlet 12 Downstream of the Venturi tube formed by the nozzle 10, a mouth or inlet 12 is moreover provided for supplying water at a hydraulic system pressure, so as to provide a solution or mixture, depending on the type of the used material.
  • the oversaturated solution or mixture, at the outlet of the nozzle, will immediately loose the acquired propelling power, with a comparatively high reduction of the stony matrix, on which the cleaning product is ejected.
  • Said protecting products are generally based on paraffins or fluorine resins and are typically made depending on their particular application.
  • an anti-wording protective product i.e. a fluorine resin aqueous solution, suitable to facilitate the removal of the vandalic wordings.
  • the product does not form films, does not change the color of the processed surface and allow the support to transpire with respect to the water steam, and moreover it also has good waterproofing characteristics.
  • the product would be of a sacrificial type, since, in removing the wordings, also a protective layer is removed which, however, could be reapplied after the cleaning operation.
  • Another protective product would comprise a paraffinic wax aqueous emulsion which, after application, will form a film on the coating surface, and, upon drying the film, will allow to obtain very good waterproofness properties without altering the transpiration capability.
  • This product would allow to achieve a better water resistance and, moreover, will prevent atmospheric powder or dirt to adhere, which would frequently deteriorate the film aspect.
  • the latter is also adapted to greatly facilitate the removal of the vandalic wordings.
  • Yet another specific protective product, for horizontal surfaces would comprise fluorine resin dissolved in a solvent.
  • Such a product does not form films and change the support color, and moreover has very good waterproofing and oilproofing characteristics, and is adapted to greatly facilitate the removal of alimentary gums and soil in general.
  • a paint removal product for removing paints from the surfaces being processed, a paint removal product will be used, comprising a biodegradable cleaning component, to be applied by spraying or by padding and which could be reapplied in a case of a difficult to be removed wording.
  • the invention provides a method for cleaning stony surfaces and the like with a low environment impact which, by combining a mechanical action and chemical action, allows to overcome all the drawbacks of the prior art, by providing a very satisfactory cleaning of the surfaces being processed, without abrading them, but carrying out a very efficient and delicate removal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Road Signs Or Road Markings (AREA)
  • Cleaning In General (AREA)

Claims (12)

  1. Procédé de nettoyage d'une surface en pierre, sans abraser ladite surface en pierre, caractérisé en ce que ledit procédé comprend les étapes d'éjection sur ladite surface en pierre, d'une solution aqueuse de nettoyage non abrasive, ladite solution comprenant de l'eau sous une faible pression d'un système hydraulique d'alimentation en eau et une substance de nettoyage légèrement abrasive, ladite solution étant conçue pour fournir sur ladite surface en pierre une action physico-chimique pour retirer de ladite surface en pierre, sans abraser ladite surface en pierre, des matériaux à particules atmosphériques, des couches de peinture et des dépôts de masses tels que des gommes alimentaires, d'application sur la surface en pierre nettoyée d'un produit protecteur, ledit produit protecteur étant un produit anti-écriture, non filmant, préservateur de couleur, transpirant et à l'épreuve de l'eau adapté pour faciliter l'enlèvement de graffitis de ladite surface en pierre nettoyée sans former de films sur celle-ci ou changer la couleur de celle-ci.
  2. Procédé selon la revendication précédente, caractérisé en ce que ladite substance de nettoyage de ladite solution comprend du bicarbonate de sodium ayant de préférence une pureté à 99 % et une taille de particule définie.
  3. Procédé selon les revendications précédentes, caractérisé en ce que ladite substance de nettoyage comprend un mélange de bicarbonate de sodium, de carbonate de calcium et de carbonate de magnésium.
  4. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite substance de nettoyage comprend un mélange de bicarbonate de sodium, d'oxyde de fer, de carbonate de calcium et de carbonate de magnésium.
  5. Procédé selon la revendication 4, caractérisé en ce que ledit oxyde de fer est présent en une quantité inférieure à 0,016 % sous la forme de F2O3.
  6. Procédé selon la revendication 1, caractérisé en ce que ladite substance de nettoyage comprend un mélange de bicarbonate de sodium, de carbonate de calcium, de carbonate de magnésium et d'oxyde de Si.
  7. Procédé selon la revendication 6, caractérisé en ce que ledit oxyde de Si est présent en une quantité inférieure à 0,1 %.
  8. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite substance de nettoyage comprend des matériaux minéraux exempts de silice et de quartz, en particulier du type calcium et magnésium.
  9. Procédé selon la revendication 1, caractérisé en ce que ledit produit protecteur comprend une émulsion aqueuse de résine fluorée.
  10. Procédé selon la revendication 1, caractérisé en ce que ledit produit protecteur comprend une émulsion aqueuse de cire paraffinique.
  11. Procédé selon la revendication 1, caractérisé en ce que ledit produit protecteur comprend des résines fluorées dissoutes dans un solvant.
  12. Appareil d'application d'un mélange comprenant de l'eau et des solutions de bicarbonate ayant une taille de particule spécifiquement fixée, caractérisé en ce que ledit appareil comprend un réservoir de stockage de produit granulaire (1), à la sortie duquel un élément de buse de Venturi de prélèvement (2) est agencé, qui est alimenté en air (3) délivré par une conduite d'admission d'air (4) couplée à une buse de Venturi de distribution (10) au niveau d'un tube de transport (11) destiné à transporter jusqu'à ladite buse de Venturi de distribution (10) ledit produit granulaire, en aval de ladite buse de Venturi de distribution (10), une injection d'eau (12) étant de plus fournie.
EP05004420A 2004-03-04 2005-03-01 Méthode a faible impact environnemental et appareil pour le nettoyage des surfaces minérales Not-in-force EP1582295B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000421A ITMI20040421A1 (it) 2004-03-04 2004-03-04 Procedimento per la pulizia di superfici lapidee e simili con ridotto impatto ambientale
ITMI20040421 2004-03-04

Publications (2)

Publication Number Publication Date
EP1582295A1 EP1582295A1 (fr) 2005-10-05
EP1582295B1 true EP1582295B1 (fr) 2010-04-28

Family

ID=34878845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05004420A Not-in-force EP1582295B1 (fr) 2004-03-04 2005-03-01 Méthode a faible impact environnemental et appareil pour le nettoyage des surfaces minérales

Country Status (4)

Country Link
EP (1) EP1582295B1 (fr)
AT (1) ATE465845T1 (fr)
DE (1) DE602005020871D1 (fr)
IT (1) ITMI20040421A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200003008A1 (it) 2022-02-17 2023-08-17 Andrea Macchia Sistema pulente per la pulitura delle superfici dipinte di arte pubblica vandalizzate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600097204A1 (it) * 2016-09-28 2018-03-28 Cristanini Spa Apparato per lo spruzzaggio di una miscela abrasiva verso una superficie delicata per la rimozione di scritte, disegni o graffiti dalla stessa
CN112691971B (zh) * 2020-12-10 2022-08-05 深圳信息职业技术学院 一种微孔树脂的深度清洗装置和方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152223B1 (fr) * 1984-02-09 1990-09-05 C. Barriquand et Fils Jets haute pression
US4731125A (en) * 1984-04-19 1988-03-15 Carr Lawrence S Media blast paint removal system
WO1993018863A1 (fr) * 1992-03-20 1993-09-30 Church & Dwight Company, Inc. Decapant abrasif et procede d'utilisation
US5527203A (en) * 1992-08-28 1996-06-18 Cook; Jack R. Method for removal of surface contaminants from metal substrates
US5366560A (en) * 1993-09-03 1994-11-22 Yelapa Enterprises, Inc. Cleaning method utilizing sodium bicarbonate particles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200003008A1 (it) 2022-02-17 2023-08-17 Andrea Macchia Sistema pulente per la pulitura delle superfici dipinte di arte pubblica vandalizzate

Also Published As

Publication number Publication date
ITMI20040421A1 (it) 2004-06-04
ATE465845T1 (de) 2010-05-15
DE602005020871D1 (de) 2010-06-10
EP1582295A1 (fr) 2005-10-05

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