EP2307151A1 - Method and device for the improved particulate decontamination of a surface by extraction - Google Patents
Method and device for the improved particulate decontamination of a surface by extractionInfo
- Publication number
- EP2307151A1 EP2307151A1 EP09779880A EP09779880A EP2307151A1 EP 2307151 A1 EP2307151 A1 EP 2307151A1 EP 09779880 A EP09779880 A EP 09779880A EP 09779880 A EP09779880 A EP 09779880A EP 2307151 A1 EP2307151 A1 EP 2307151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blowing
- wall
- oblique
- air
- particulate
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
Definitions
- the invention relates to improving the particulate surface decontamination of an object.
- the invention can be applied more particularly to decontamination in areas with a controlled environment.
- a contaminant is designated in ISO 14644-4 as follows: "Any particulate, molecular, non-particulate or biological entity that may produce an adverse effect on the product or process".
- a new international standard ISO 14644-9 for classifying particulate cleanliness of surfaces is being approved.
- the surface particulate contaminants considered according to this new standard are those whose unit size is generally between 0.05 ⁇ m and 500 ⁇ m for the purposes of classification.
- the new standard proposes to consider new specific ranges not included in this wide range. It is according to this new standard to determine the number per m 2 of these particulate surface contaminants.
- contaminants of biological origin can be likened to surface particles when they are dead. Dead biological contaminants are therefore within the scope of the invention.
- Vacuum cleaners are the best known and most used devices for the dry process. Pistols blowing air sometimes ionized and filtered are also used on polluted surfaces to make them clean.
- the cleaning heads are based on flat soles with or without more or less abrasive materials (brush, dry cloth possibly coupled with a wet cloth afterwards).
- the blowing of filtered air is again carried out orthogonally to the surface to be analyzed.
- Inclined peripheral channels 196 of smaller diameter than that of the blast duct 188 are provided at the periphery for effecting the suction of the blown air containing the possible surface particulate contaminants.
- the patent WO 02/097402 discloses a device and a method for decontaminating by blowing free air jets orthogonal to the surface 2 to be decontaminated and central aspiration of a so-called Jet jet Wis 4.
- the solution according to this patent further contributes to pressing particles against surface 2 rather than detaching them.
- the object of the invention is then to propose a solution which makes it possible to effect a particulate surface decontamination of an effective object, in particular according to the new ISO 14644-9 standard.
- the invention relates to a method for the particulate surface decontamination of an object, comprising the following steps: a) blowing clean air obliquely on a given surface of the object, b) suction of the oblique air blown containing any particulate contaminants, step b) being performed with a different blow oblique at different points of the determined surface.
- the oblique blow is produced by making a grazing angle, less than 45 ° with respect to the surface of the object.
- the value of the grazing angle can be chosen according to the surface nature of the object, the blowing rate, the suction flow rate.
- the shaping angle may for example be between 0 and 45 °.
- the particulate surface contaminants sucked up can be collected downstream. It is thus possible to perform subsequent physico-chemical analyzes of the collection. We can also confine the particles collected and collected and make them undergo a specific treatment depending on the inherent danger of the nature of the particles (chemical toxicity or chemical radio ).
- the device may advantageously comprise a filtration membrane mounted in the suction means for collecting particulate contaminants sucked.
- the counting device (s) according to the invention may be constituted by any type of apparatus implementing an aerosol metrology technology.
- an optical counting device of the laser diode type, may preferably be envisaged in order to quantify particles smaller than 10 ⁇ m. It is also possible to envisage a condensation ring counter in order to quantify particles of nanometric size. Counters using an electric type count, such as the E.L.P.I ("Electrical Low Pressure Impactor") meters, can also be considered.
- an optical counter of the laser diode type, whose lower counting limit is of the order of 0.1 ⁇ m and the upper limit is of the order of 10 ⁇ m.
- condensation ring counter can be used whose lower counting limit is about 5 to 7 nm (nanometers).
- cleaning air it should be understood here and in the context of the invention, that the blown air is filtered so as not to contain particles of size greater than a given value, preferably equal to the lower limit of counting of the counting device.
- the inventor has demonstrated that the detection and counting devices using the combined blow / suction principle combined two limits: on the one hand, at the level of the actual extraction of the particles and, on the other hand, at the level of the detection or analysis proper of the particles.
- the inventor therefore decided to push each of these two limits respectively.
- the inventor has been able to observe that the probes according to the state of the art all have a non-optimized blowing aeraulic to effectively pick up the contaminants deposited on the surface, in particular if they are retained by surface defects.
- the inventor considered that the probes according to the state of the art implementing the combined principle of air blowing and suction could not be used as such to serve as effective particulate surface decontamination device.
- the blowing for example by the probes disclosed in the patents cited in the preamble, is carried out orthogonally to the surface and in a limited area thereof. Also, such a localized orthogonal blowing contributes more to somehow flatten the particulate contaminants present in the area and not necessarily pick up those present on the surface outside this area directly impacted by blowing.
- the oblique blowing according to the invention is carried out with a multiplicity of channels oriented differently according to the points of the surface.
- the air comes to attack the tangential and thus effectively the particles on the surface.
- the method according to the invention makes it possible to effectively decontaminate a surface of an object and where appropriate, properly confining a surface sample of an object to be qualified in terms of particulate or biological surface cleanliness.
- the invention also relates to a device for particulate surface decontamination of an object, comprising:
- blowing means for blowing clean air obliquely on a given surface of the object
- blowing means for aspirating the oblique air blown containing any surface contaminants, the blowing means are further adapted to blow clean air with a oblique different blowing at different points of the surface to be analyzed.
- the device may comprise a head intended to be in contact with the object and comprising a wall adapted to come opposite that of the object to be decontaminated, the means of blowing clean air to the oblique with channels drilled obliquely in the wall.
- a wall cross section which has a concave shape, with oblique channels distributed over the concavity of the wall.
- a cross-section of a wall of planar shape that is to say with the surface facing the surface to be decontaminated which is flat and whose surface is substantially equal to that to decontaminate.
- the clean air when the shape of the wall cross section is flat, the clean air is blown at an equal distance regardless of the oblique channel from which it exits, whereas when the shape is concave, the clean air is blown at different distances from the oblique air outlet.
- the device may comprise a head intended to be in contact with the object and comprising a wall adapted to face the one of the object to be decontaminated, the means of blowing clean air to the oblique comprising steerable nozzles and arranged in the wall.
- the head comprises a contact sole with the object, made of material (x) chemically neutral (s) vis-à-vis the object, and arranged at the periphery of the wall.
- a defined degassing rate for example, such that the total mass loss is less than 1% according to the ECSS Q70-2A test and such that the recondensed volatile quantity is less than 0.1% according to the same test,
- the device may further include means for generating a non-contaminating air cushion below the contact flange to move the device between two different determined surfaces.
- the invention finally relates to the application of the method described above or the device referred to above to particulate surface decontamination in areas with controlled environment.
- industries space, micromechanics, optics, nanotechnology, but also pharmaceutical and food industry, hospitals .
- it can be particularly interesting to ensure cleanliness of the surfaces of an object.
- FIG. 1 is a schematic representation of a device for particulate surface decontamination according to the invention
- FIG. 2 and 3 show, in sectional view, two different embodiments of a head implanted in a device according to the invention.
- the device according to the invention 1 shown schematically makes it possible to carry out particle decontamination a surface S 'of an object whose control surface is to be controlled and / or decontaminated S.
- the device 1 comprises a whole head 2 adapted to come into contact with the surface S of the object via a sole 20 made of one or more chemically neutral materials (s) with respect to the object, such ( s) Teflon.
- the sole 20 is arranged at the periphery of the head wall 2 from which oblique blow molding is performed.
- Blowing means 3 are provided for respectively blowing clean air obliquely on the surface S '.
- These blowing means 3 comprise a blowing duct 30 with which is connected a pump with filter 31 for blowing back while filtering the air to make it clean.
- This blowing duct 30 opens on channels made in a wall 21 of the head 2
- the wall 21 has a concave cross-section, that is to say it defines a concavity between the surface S 'of the object to be decontaminated, when the head 2 is in contact with it.
- the concave general section of the wall 21 may be hemispherical or semi-cylindrical or semi-cylindrical. ellipsoidal.
- the longitudinal section of the wall 21 may be rectangular or square.
- the blowing channels 200 are made so as to individually blow oblique air at a multiplicity of oblique angle: BLOW, BLOW2, BLOW3, BLOW4 ... ASP aspiration is done in the central part of the concave wall 21 of the head.
- the wall 21 constituted by a cylinder full of height that is small in relation to its diameter.
- the suction is carried out by suitable means 4 comprising a duct. suction 40 connected to a channel 22 formed in the central portion of the wall 21 head.
- the suction is substantially in an orthogonal direction ASP to the surface S 'to be decontaminated.
- the oblique channels 200 are all drilled with an identical output and grazing with a grazing angle between 0 and 45 °.
- a suction flow rate of the order of 100 l / min and a suction speed of between 3 and 12.5 m / s gave complete satisfaction.
- An additional peripheral suction could be envisaged which would preferentially collect the larger particles.
- a double suction is realized with one carried out on the bottom of the wall (the closest one). of the object in decontamination position) and with the other carried on the top of the head wall.
- the pump 31 is further connected to the suction pipe 40 so that it discharges any particulate contaminants sucked.
- a filtration membrane 5 it is possible to collect the particles sucked downstream in the suction pipe 40 on a filtration membrane 5.
- a window 6 in order to visually check the state of cleanliness of the membrane. Recovery of the collection membrane allows physico-chemical analyzes thereafter.
- the membrane may be confined and undergo chemical or physico-chemical treatment if the particles contaminating the surface S exhibit toxicity.
- a counting device for example optics implanted downstream. This is preferably adapted to quantify particles of unit size between a lower value of the order of 0.1 ⁇ m and a higher value of the order of 10 ⁇ m which pass in the duct 40.
- the head 2 of the device may comprise a sole 20 of contact with the object, which is made of material (x) chemically neutral (s) vis-à-vis the surface S of the object.
- This sole 60 may be advantageously Teflon.
- the geometry of the sole 20 (for example square or circular) can be advantageously adapted to the geometry of surfaces S 'to be qualified according to ISO 14644-9.
- the head 2 of the device 1 can optionally move autonomously on a non-contaminating air cushion for remote controlled control point by point of decontamination or automated large area.
- the operation of the device 1 according to the invention is as follows:
- the suction can be made simultaneously oblique blow at the beginning of it or after a certain period of latency.
- the latter may be chosen according to the nature of the particles to be sucked, the surface of the object to be decontaminated, and the suction flow rate.
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0854263A FR2933012B1 (en) | 2008-06-26 | 2008-06-26 | METHOD AND DEVICE FOR PARTICULAR DECONTAMINATION OF SURFACE BY IMPROVED EXTRACTION |
PCT/EP2009/057761 WO2010003812A1 (en) | 2008-06-26 | 2009-06-23 | Method and device for the improved particulate decontamination of a surface by extraction |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2307151A1 true EP2307151A1 (en) | 2011-04-13 |
EP2307151B1 EP2307151B1 (en) | 2017-08-30 |
Family
ID=40328906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09779880.5A Not-in-force EP2307151B1 (en) | 2008-06-26 | 2009-06-23 | Process for removing particles from a surface by improved suction |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2307151B1 (en) |
FR (1) | FR2933012B1 (en) |
WO (1) | WO2010003812A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900017486A1 (en) * | 2019-09-30 | 2021-03-30 | Ima Spa | PACKAGING MACHINE FOR THE PRODUCTION OF FILTER BAGS WITH INFUSION PRODUCTS. |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012028169A1 (en) * | 2010-08-30 | 2012-03-08 | Lothar Munder | Device and method for cleaning a surface |
WO2013152984A1 (en) * | 2012-04-10 | 2013-10-17 | Tetra Laval Holdings & Finance S.A. | Edge cleaner |
CN105057278B (en) * | 2015-08-06 | 2017-03-22 | 青岛金叶精密机械有限公司 | Dust blowing and sucking device for surface of coiled material |
KR101936026B1 (en) * | 2018-11-23 | 2019-01-07 | 김진호 | Apparatus for removing particles using symmetrical gas injection |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH458680A (en) * | 1967-09-08 | 1968-06-30 | Kaelin Erich | Method and device for continuous dedusting of material webs |
US5253538A (en) * | 1991-04-26 | 1993-10-19 | Dryden Engineering Co., Inc. | Method and device for quantifying particles on a surface |
US5939647A (en) * | 1996-01-16 | 1999-08-17 | Applied Materials, Inc. | Surface particle sampling head having a rotatable probe |
GB2376873A (en) * | 2001-05-31 | 2002-12-31 | Ian Robert Fothergill | Analysis or disposal of surface adherents |
AT410980B (en) * | 2001-06-05 | 2003-09-25 | Paper Testing Instr Gmbh | PARTICLE PROBE, MEASURING SYSTEM AND METHOD FOR DETERMINING THE DUST LOAD OF A RAIL-SHAPED OBJECT |
DE10252377B4 (en) * | 2002-11-15 | 2006-11-09 | Man Roland Druckmaschinen Ag | Processing machine with a non-contact dedusting device |
-
2008
- 2008-06-26 FR FR0854263A patent/FR2933012B1/en active Active
-
2009
- 2009-06-23 WO PCT/EP2009/057761 patent/WO2010003812A1/en active Application Filing
- 2009-06-23 EP EP09779880.5A patent/EP2307151B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2010003812A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900017486A1 (en) * | 2019-09-30 | 2021-03-30 | Ima Spa | PACKAGING MACHINE FOR THE PRODUCTION OF FILTER BAGS WITH INFUSION PRODUCTS. |
WO2021064587A1 (en) * | 2019-09-30 | 2021-04-08 | I.M.A. Industria Macchine Automatiche S.P.A. | Packaging machine for making filter bags with infusion products. |
US12054301B2 (en) | 2019-09-30 | 2024-08-06 | I.M.A. Industria Macchine Automatiche S.P.A. | Packaging machine for making filter bags with infusion productions |
Also Published As
Publication number | Publication date |
---|---|
FR2933012B1 (en) | 2011-11-25 |
EP2307151B1 (en) | 2017-08-30 |
WO2010003812A1 (en) | 2010-01-14 |
FR2933012A1 (en) | 2010-01-01 |
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