WO1996016770A2 - Procede et dispositif pour traiter des agents et des eaux de sablage - Google Patents

Procede et dispositif pour traiter des agents et des eaux de sablage Download PDF

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Publication number
WO1996016770A2
WO1996016770A2 PCT/DE1995/001707 DE9501707W WO9616770A2 WO 1996016770 A2 WO1996016770 A2 WO 1996016770A2 DE 9501707 W DE9501707 W DE 9501707W WO 9616770 A2 WO9616770 A2 WO 9616770A2
Authority
WO
WIPO (PCT)
Prior art keywords
water
blasting
collecting
blasting agent
mixture
Prior art date
Application number
PCT/DE1995/001707
Other languages
German (de)
English (en)
Other versions
WO1996016770A3 (fr
Inventor
Wilhelm Schmidt
Original Assignee
Abrex Oberflächentechnik 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
Priority claimed from DE4442996A external-priority patent/DE4442996C2/de
Application filed by Abrex Oberflächentechnik Gmbh filed Critical Abrex Oberflächentechnik Gmbh
Publication of WO1996016770A2 publication Critical patent/WO1996016770A2/fr
Publication of WO1996016770A3 publication Critical patent/WO1996016770A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • 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
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • 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
    • B24C7/0069—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 with means for preventing clogging of the equipment or for preventing abrasive entering the airway
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/003—Removing abrasive powder out of the blasting machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a method and a device for the treatment of blasting media and water jet according to the preamble of claim 1.
  • Blasting with blasting media in particular sandblasting, in which dust formation is avoided by the addition of jet water, is also increasingly being used for the renovation of building walls, for facade cleaning and the like.
  • Parts of the object to be blasted e.g. B. color, possibly easily removable parts of the object, sand-shaped parts, but also large parts, such as wall fragments and the like.
  • blasting agent and the jet water have either not been recycled, so that large amounts of blasting agent and jet water are mixed as waste contaminating particles remain, or it was dried, sieved and filtered in a complex and costly manner.
  • the invention is based on the object of creating a closed circuit in which the abrasive and the jet water are continuously recycled.
  • a further object of the invention is to filter the contaminating particles as pure as possible (wall stone, dirt, paint) from the circulation.
  • radioactively contaminated material which is produced, for example, when blasting media with slightly radioactive walls, so that there is no concentration of radioactive material in the circuit when the blasting media is run through several times.
  • An advantage of the inventive solution to the problem as described in the features of claim 1 is, in particular, that in a first collecting / collecting device there is a calm, non-turbulent water layer over the abrasive which is deposited (mixed with emitted polluting particles) trains.
  • This blasting agent / particle-water mixture is conveyed by suction from the bottom layer of a collecting / collecting device into at least one blasting agent storage container filled with water.
  • Abrasive particles that have a significantly higher density than water advantageously fall relatively directly to the bottom of the abrasive container.
  • Loading Components that have approximately the same density as water or a lower mass can be filtered out because these components, which are kept in suspension by strong water vortices, emerge from the overflow of the blasting agent reservoir together with displaced water and are concentrated on an easily replaceable filter can be, so that there is no concentration of these components at another, undesired point in the cycle.
  • the relatively purified water is advantageously brought back into the circuit during the blasting, but in particular when the object to be blasted is washed off.
  • the constituents which have approximately the density of water or are of low mass will in particular be radioactive contaminated color particles. According to the invention, these are filtered out again at least to the extent that they enter the circuit in the same circulation, so that an uncontrolled accumulation in inaccessible places is excluded.
  • Coarse constituents can be collected by an advantageously provided retaining device, such as a sieve, above the collecting / collecting device, so that they do not interfere in the further circulation of the blasting agent.
  • Floating polluting particles e.g. Styrofoam
  • Styrofoam will float on the water layer and can be easily removed from there.
  • the admixture of those in the circuit which are still to be cleaned of paint particles is particularly advantageous Water when removing abrasive / particle-water mixture from the collecting / collecting device. This makes it possible for the first time that the very viscous, hardly flowable wet granulate can be pumped or sucked in. This results synergistically in the effect that the paint particles are comminuted through the conduits together with the blasting agent and are detached from any adhering sand particles so that they do not settle together with them, but instead behave according to the specific weight of the color itself.
  • Excess water accumulating in the blasting agent container is removed there and, after filtering into the collecting / collecting device above the area of the blasting agent removal opening, the newly arriving jet water arriving from the blasted object and already settling above the blasting agent to the desired extent added.
  • the filter device provided with a filter fleece in which suspended matter particles are collected, now advantageously releases its almost completely purified water back into the collecting / collecting device to the extent necessary to keep the water level constant , so that light components floating on the water can be removed mechanically at the same place at all times. All coarse components can be removed mechanically beforehand from a sieve, which advantageously covers the collecting / collecting device.
  • the addition of water to improve the viscosity of the blasted material is provided in such a way that a strong addition Turbulence forms in the extraction nozzle.
  • This can be achieved by additionally directing the water supply direction against the abrasive / particle mixture removal / discharge direction, water and sand advantageously being mixed in approximately equal amounts.
  • the geometry of the extraction nozzle is slightly chamfered with a covering overhang and is arranged in the collecting / collecting device so that it slopes upwards slightly.
  • the water supply from the water extraction snorkel advantageously takes place from above into the blasting material extraction nozzle.
  • low-viscosity fluid in particular water
  • water low-viscosity fluid
  • “thin fluid” is any fluid that has a higher viscosity than moist blasting media.
  • the fluid addition which improves the viscosity of the blasted material is provided in such a way that, due to the geometry, a strong turbulence is already formed in the bleed nozzle.
  • This can be achieved by additionally directing the water-supplying device, for example, against the blasting agent removal outflow direction, which advantageously means that sand and water can be mixed in approximately the same ratio.
  • the removal nozzle is further proposed with such a shape that there is a slightly bevelled end edge with a covering overhang, and the removal nozzle is preferably arranged slightly obliquely upwards out of the storage container.
  • Water is advantageously fed into the extraction nozzle from above.
  • the water supplied can come from any source. It is conceivable to enter fresh water directly at this point, or to use process water that is already in a cycle, be it settled purified water or water contaminated with color particles.
  • 1 is a schematic diagram of the entire device, in which a sketched clinker wall is shown as an object to be blasted, and
  • FIG. 2 is a sectional view showing the removal of the blasting medium from a storage container in which a blasting medium / water mixture (with a water content of more than 18%) is deposited,
  • FIG. 3 shows a fluid (water) supply line in front of a siphon for removing the blasting agent, in which the distance between the end of the supply line and the siphon can be regulated,
  • FIG. 6a shows a device in which the devices from FIGS. 3 and 4 are used and in which the water supply is controlled with a three-way valve
  • FIG. 6b shows a device like FIG. 6a, in which the devices from FIGS. 4 and 5 are used.
  • the device shown in FIG. 1 for the reuse of blasting agent and water jet has a blasting nozzle 10 on the left edge, with which a jet containing blasting agent and water is directed onto the object 12 to be blasted, for example a clinker wall can be tet.
  • the blasting agent falling from the clinker wall mixed with the jet water and any particles detached from the clinker wall, e.g. B. color, dirt or sand-like constituents falls into a collecting / collecting device 14, advantageously a collecting / collecting device which tapers downwards as a container and is covered with a sieve 16.
  • the screen 16 advantageously has a small opening width, for example 3 mm, so that coarse components can be removed from the screen 16.
  • a water layer 20 forms above the settling area 18 for the blasting agent mixture.
  • Sand which due to its higher density sinks downwards, is advantageously used as the blasting agent, this settling movement taking place relatively free of turbulence, so that components which are a little lighter than the jet water will float on a cover layer.
  • the blasting agent / particle-water mixture can be removed from this container of the collecting / collecting device 14, as better shown in FIG. 2, with the aid of a suction pipe or a removal nozzle 22.
  • a region 62 is formed in this removal nozzle 22, into which the blasting agent slides out of the remaining collecting / collecting device.
  • the abrasive cannot be pumped easily due to its high friction with the walls and its low viscosity 9 -
  • a pump 54 which feeds the blasting medium to a blasting medium container 26. It is also conceivable to use a compressor which pressurizes the collecting / collecting device for conveying it out, or a suction of the blasting agent / particle-water mixture (SSW) by means of a vacuum.
  • SSW blasting agent / particle-water mixture
  • the blasting agent container In the blasting agent container, the blasting agent will settle in the lower region 28 and a layer 30 of water and similarly heavy or low-mass particles will arise turbulently above it. Due to the turbulent mixing, it is now possible for the first time to also remove in a liquid jet those parts which pass through a valve 34 which are only slightly lighter or heavier than water or which have only small masses. It is also possible to deposit the fine components in a sludge layer, which can be removed to the outside through special outlets. It is conceivable to create several such water extraction openings which discharge different fractions.
  • the removal of larger amounts of water is possible, among other things, because the amount of water that has been added to the blasting agent is no longer required to remove the deposited blasting agent from the tank. to execute. Rather, the water is now cleaned again via a further filter device with a water filter basin 40 and a fleece filter 36.
  • the fleece filter 36 serves, among other things, to collect the small color particles, which have approximately the density of the water, and can be disposed of together with them.
  • Excess water from this water filter basin 40 can either be disposed of as normal process water, which is now almost pure, or, according to the invention, can advantageously be returned to the collecting / collecting device 14 via a water supply line 38, where it can be removed by the removal snorkel 24 is removed again in relatively large quantities.
  • it can also be used for the blasting agent transport in the blasting hose 64 and advantageously also for washing off the blasted object 12.
  • the removal snorkel 24 is advantageously arranged in a region clearly spaced from the water supply, in order to supply water with colored particles to the blasting agent through a line 52 if possible.
  • the removal snorkel 24 can be designed as a float.
  • the filter fleece 36 advantageously has a pore size of 20 ⁇ , so that crushing only contributes to the correct uniform particle size suitable for the filter.
  • the swirling of all particles in the blasting agent container 26 is advantageously prevented by a pouring cone 32 for wide-area input of the particles.
  • supports which widens the feed jet in a feed area.
  • An agitator can be provided for support.
  • a collecting container (not shown), to which the blasting agent / particle-water mixture (SSW) is supplied as storage, and in which it can be temporarily removed from the circuit.
  • the blasting medium pressure container should also be able to be loaded with blasting medium again from this collecting container, for example by means of a pouring flap.
  • blasting agent for example pit sand or river sand
  • the end edge 60 of the extraction nozzle is designed with a slight overhang upwards so that material sliding down from above must bypass the overhang. This will result in a pouring edge with a relatively flat angle.
  • the upper cone of this pouring cone 62 is acted upon by water supplied by means of a water pipe 52, with already wet blasting medium - 12th
  • the supply line 52 for the water be provided with an angle of incidence a of less than 90 °, that is to say to point against the pumping direction in the extraction nozzle, so that there is better swirling.
  • the thin fluid fluid e.g. B. the water, which is supplied through line 52, directed directly onto the pouring cone.
  • the angle a is approximately 45 °.
  • smaller angles are conceivable if a high flow rate can be achieved through a narrow cross section of the water supply line 52.
  • a feed line 52 for low-viscosity fluid is provided in the removal nozzle 22 in front of its mouth, the distance between the outlet nozzle mouth and the end of the feed line being adjustable in a preferred embodiment.
  • 4 shows a mouth section of the feed line 52, which projects into a strongly curved section 24 of the removal nozzle 22 up to a part of its diameter, so that in this region, which is very susceptible to deposits, the curvature causes the greatest change in the conveying direction causes good swirling.
  • a mouth section 50 of the feed line 52 is oriented in a corresponding partial section of the removal nozzle 22 after a section coming almost perpendicularly from the side parallel to its extension in the conveying direction, so that, above all, the flow rate is increased .
  • FIGS. 6a and 6b more than one orifice section is provided for the supply line 52, the supply of thin fluid between the orifices 46, 48 of the supply line being adjustable by a metering valve 44 and a three-way valve 42 connected downstream.
  • 6a shows the suggestions of FIGS. 3 and 4, feeds in front of the mouth and in the region of curvature of the removal nozzle
  • FIG. 6b the suggestions of FIGS. 4 and 5, feeds parallel to the removal nozzle and combined in its area of curvature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un dispositif permettant de réutiliser des agents et des eaux de sablage, qui comprend un ajutage de projection (10) grâce auquel l'agent de sablage mélangé à de l'eau de sablage peut être appliqué sur un produit à sabler (12), un dispositif collecteur/accumulateur (14) pour le mélange agent de sablage-fragments de produit sablé-eau, qui retombe du produit sablé, un dispositif de retenue (16) pour les fragments de grande dimension dudit mélange, une zone de dépôt (18) pour l'agent de sablage au-dessus duquel se trouve une couche (20) d'eau de sablage dans le dispositif collecteur/accumulateur (14), un raccord de prise (22) pour l'agent de sablage et les fragments provenant du produit sablé, qui fait saillie dans la zone de dépôt (18), une pompe aspirante ou refoulante (54) servant à produire une force qui permet de transporter l'agent de sablage, et un schnorchel de prise d'eau (24) qui fait saillie dans la couche d'eau de sablage (20) et qui se termine dans la zone de dégorgement du raccord de prise (22), afin de provoquer la séparation et la réutilisation d'un mélange granulé-eau, par l'apport d'eau dans le raccord de prise (22).
PCT/DE1995/001707 1994-12-02 1995-12-01 Procede et dispositif pour traiter des agents et des eaux de sablage WO1996016770A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4442996A DE4442996C2 (de) 1994-12-02 1994-12-02 Verfahren und Vorrichtung zur Wiederverwendung von Strahlmittel und Strahlwasser
DEP4442996.7 1994-12-02
DE29503359.2 1995-02-28
DE29503359U DE29503359U1 (de) 1994-12-02 1995-02-28 Vorrichtung zur Entnahme von feuchtem Strahlmittel

Publications (2)

Publication Number Publication Date
WO1996016770A2 true WO1996016770A2 (fr) 1996-06-06
WO1996016770A3 WO1996016770A3 (fr) 1996-08-29

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999055492A1 (fr) * 1998-04-28 1999-11-04 Flow International Corporation Machine et procede pour le decoupage a jet de fluide haute pression, avec dispositif d'elimination des particules abrasives
US6328638B1 (en) 1998-04-28 2001-12-11 Flow International Corporation Apparatus and methods for recovering abrasive from an abrasive-laden fluid
EP1325890A1 (fr) * 2001-12-28 2003-07-09 Mühlhan Surface Protection International GmbH Procédé pour l' élimination d'une suspension aqueuse de boues constituée d' agents de sablage et de résidus de matières de revêtement
US6969429B2 (en) 2003-07-08 2005-11-29 Muhlhan Surface Protection International Gmbh Method for removing blast media and colored residues comprising an aqueous slurry suspension
CZ296881B6 (cs) * 2001-08-22 2006-07-12 Aquadem, S. R. O. Zpusob odsávání suspenze voda - kal z vany zarízení k delení materiálu vysokotlakým vodním paprskema odkalovací zarízení pro zarízení k delení materiálu vysokotlakým vodním paprskem
JP2010253610A (ja) * 2009-04-24 2010-11-11 Disco Abrasive Syst Ltd ウォータジェット加工装置
EP2463057A3 (fr) * 2010-10-24 2012-08-22 Paul Auer GmbH Dispositif de sablage ou de rayonnement d'objets
US8696406B2 (en) 2010-02-24 2014-04-15 Werner Hunziker Device for blast-machining or abrasive blasting objects
IT202200018384A1 (it) * 2022-09-09 2024-03-09 Rimor Srl Dispositivo di recupero del materiale abrasivo di un impianto di sabbiatura

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576008A (en) * 1949-09-09 1951-11-20 Pangborn Corp Wet blasting machine
US3329267A (en) * 1961-06-15 1967-07-04 Ajem Lab Inc Apparatus for handling grit
US3425250A (en) * 1965-10-22 1969-02-04 Surcon Surface Conditioning Pr Peening bead cleaner
DE1804667A1 (de) * 1967-10-24 1969-10-30 Abrasive Dev Vorrichtung zum Absaugen und Vermischen einer aus einer Fluessigkeit und Feststoffteilchen bestehenden Aufschwemmung,insbesondere fuer Strahllaepp- oder Nassstrahlvorrichtungen
US3553895A (en) * 1967-11-20 1971-01-12 Bruce W Power Hydraulic surface conditioning machine
EP0359701A2 (fr) * 1988-09-16 1990-03-21 Daniel Mattmann Procédé et dispositif de préparation et réutilisation de sable dans un procédé de sablage par l'eau à haute pression
WO1990015694A1 (fr) * 1989-06-15 1990-12-27 B.H.R. Group Limited Alimentation en melange abrasif
EP0437311A1 (fr) * 1990-01-04 1991-07-17 H&G PROCESS CONTRACTING LTD Dispositif pour éliminer des matières solides
US5049260A (en) * 1990-08-29 1991-09-17 Spears Richard L Blast cleaning wet media feed and separation system
US5283991A (en) * 1992-09-08 1994-02-08 Josef Keizers Sandblasting method and a moist-sand blasting apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576008A (en) * 1949-09-09 1951-11-20 Pangborn Corp Wet blasting machine
US3329267A (en) * 1961-06-15 1967-07-04 Ajem Lab Inc Apparatus for handling grit
US3425250A (en) * 1965-10-22 1969-02-04 Surcon Surface Conditioning Pr Peening bead cleaner
DE1804667A1 (de) * 1967-10-24 1969-10-30 Abrasive Dev Vorrichtung zum Absaugen und Vermischen einer aus einer Fluessigkeit und Feststoffteilchen bestehenden Aufschwemmung,insbesondere fuer Strahllaepp- oder Nassstrahlvorrichtungen
US3553895A (en) * 1967-11-20 1971-01-12 Bruce W Power Hydraulic surface conditioning machine
EP0359701A2 (fr) * 1988-09-16 1990-03-21 Daniel Mattmann Procédé et dispositif de préparation et réutilisation de sable dans un procédé de sablage par l'eau à haute pression
WO1990015694A1 (fr) * 1989-06-15 1990-12-27 B.H.R. Group Limited Alimentation en melange abrasif
EP0437311A1 (fr) * 1990-01-04 1991-07-17 H&G PROCESS CONTRACTING LTD Dispositif pour éliminer des matières solides
US5049260A (en) * 1990-08-29 1991-09-17 Spears Richard L Blast cleaning wet media feed and separation system
US5283991A (en) * 1992-09-08 1994-02-08 Josef Keizers Sandblasting method and a moist-sand blasting apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999055492A1 (fr) * 1998-04-28 1999-11-04 Flow International Corporation Machine et procede pour le decoupage a jet de fluide haute pression, avec dispositif d'elimination des particules abrasives
US6299510B1 (en) 1998-04-28 2001-10-09 Flow International Corporation Abrasive removal system for use with high-pressure fluid-jet cutting device
US6328638B1 (en) 1998-04-28 2001-12-11 Flow International Corporation Apparatus and methods for recovering abrasive from an abrasive-laden fluid
US6361416B1 (en) 1998-04-28 2002-03-26 Flow International Corporation Apparatus and methods for recovering abrasive from an abrasive-laden fluid for use with abrasive jet cutting systems
US6375547B1 (en) 1998-04-28 2002-04-23 Flow International Corporation Method of operating a fluid jet cutting machine with abrasive removal system
CZ296881B6 (cs) * 2001-08-22 2006-07-12 Aquadem, S. R. O. Zpusob odsávání suspenze voda - kal z vany zarízení k delení materiálu vysokotlakým vodním paprskema odkalovací zarízení pro zarízení k delení materiálu vysokotlakým vodním paprskem
EP1325890A1 (fr) * 2001-12-28 2003-07-09 Mühlhan Surface Protection International GmbH Procédé pour l' élimination d'une suspension aqueuse de boues constituée d' agents de sablage et de résidus de matières de revêtement
US6969429B2 (en) 2003-07-08 2005-11-29 Muhlhan Surface Protection International Gmbh Method for removing blast media and colored residues comprising an aqueous slurry suspension
JP2010253610A (ja) * 2009-04-24 2010-11-11 Disco Abrasive Syst Ltd ウォータジェット加工装置
US8696406B2 (en) 2010-02-24 2014-04-15 Werner Hunziker Device for blast-machining or abrasive blasting objects
EP2463057A3 (fr) * 2010-10-24 2012-08-22 Paul Auer GmbH Dispositif de sablage ou de rayonnement d'objets
IT202200018384A1 (it) * 2022-09-09 2024-03-09 Rimor Srl Dispositivo di recupero del materiale abrasivo di un impianto di sabbiatura

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