EP0722366B1 - Procede, dispositif et composition pour aspersion de materiaux - Google Patents

Procede, dispositif et composition pour aspersion de materiaux Download PDF

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Publication number
EP0722366B1
EP0722366B1 EP94929710A EP94929710A EP0722366B1 EP 0722366 B1 EP0722366 B1 EP 0722366B1 EP 94929710 A EP94929710 A EP 94929710A EP 94929710 A EP94929710 A EP 94929710A EP 0722366 B1 EP0722366 B1 EP 0722366B1
Authority
EP
European Patent Office
Prior art keywords
medium
spraying
nozzles
movable member
washing
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.)
Expired - Lifetime
Application number
EP94929710A
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German (de)
English (en)
Other versions
EP0722366A1 (fr
Inventor
Oscar Wilje
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.)
Individual
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Individual
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 Individual filed Critical Individual
Publication of EP0722366A1 publication Critical patent/EP0722366A1/fr
Application granted granted Critical
Publication of EP0722366B1 publication Critical patent/EP0722366B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
    • B05B3/0418—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements comprising a liquid driven rotor, e.g. a turbine
    • B05B3/0422—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements comprising a liquid driven rotor, e.g. a turbine with rotating outlet elements
    • B05B3/0427—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements comprising a liquid driven rotor, e.g. a turbine with rotating outlet elements the outlet elements being directly attached to the rotor or being an integral part of it
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/55—Cleaning with fluid jets

Definitions

  • the consumption of liquid is of importance, particularly when it is desirable to supply a washing medium for a cleaning purpose with a certain pressure to the material or the surface of any material that is to be washed. It might for instance be the spraying of cars, hulls of boats, buildings, and also plants or loose material, such as stones or sand.
  • capillary rise reducing washing is implemented in drums or in open plansifters, and in water baths as to finer fractions.
  • Plan washing machines normally have a capacity of 80-200 tons of material/hour, and the water consumption then is in the range of 1000-2000 litres/minute, i.e. approximately 750-1500 litres/ton material.
  • Washing drums which are used for finer fractions and smaller quantities than plansifters, normally have a capacity of 25-40 tons/hour, and the water consumption is approximately 750-1200 litres/minute, depending on the required degree of purity.
  • the water water being the medium that is generally used in this context, is normally pumped at a pressure of 6-8 bars into manifolds or nozzles that are located in the drum or above a sieving grate arranged at the plan sifter and accordingly sprays the material which is to be washed and which advances within the drum or upon the sieving grate.
  • a drawback of the prior art is the large amount of water which is required for a certain spraying result, in this case the washing result. This drawback also yields problems such as, for instance, large sludge basins that have to be arranged for the large amounts of waste water, and also the acquisition of water can be troublesome and costly.
  • nozzles or manifolds used provide too small a spray image, i.e. surface sprayed upon, as at a certain, in general short, distance they are spraying the material that, for instance, is to be washed with the washing medium in question, and when it is required that a good cleaning ability is to be obtained in the sprayed area comprised by the spray image.
  • a particular drawback of the prior art with regard to capillary rise reducing washing is the relatively large capillary rise tendency presented by the washed material, e.g. shingle or macadam, also after the execution of the washing.
  • EP-A-0 247 795, EP-A-0 384 546, DE-C-3 72 395 and EP-A-0 567 208 to arrange a member provided with nozzles for a spraying medium to be movable. During spraying, this movable member is moved so that the material is subjected to sprays from the nozzle.
  • the object of the present invention is to provide a method and a device that reduces the consumed amount of spraying medium in comparison to prior art during the spraying of a material while an equivalent or even better result is obtained from the spraying.
  • the method is primarily characterized by the nozzles being rotated in relation to the movable member during spraying.
  • the nozzle will be subjected to a combined movement comprising not only the movement caused by the movable member being moved but also by rotation of the nozzles themselves in relation to the movable member.
  • This combined movement enhances the spraying efficiency substantially.
  • Said movable member is preferably a rotatable member, such as a wing, which is rotated and on which nozzles are arranged. Applied to plansifters, e.g.
  • the spraying relates to washing and the spraying medium is a washing medium, preferably water or a mixture of water and air
  • a washing medium preferably water or a mixture of water and air
  • the flow provided by manifolds or nozzles of conventional type is substituted by water jets which, under high pressure, are given a brushing effect through the motion of the movable member in relation to the material being washed.
  • a brushing effect is thus obtained without the need of using any conventional brush.
  • a conventional brush becomes worn as it is contact with the washed material, which is not the case with the equipment of the present invention.
  • the movable member can be driven by means of oblique positioning of the nozzles in relation to the material that is to be sprayed.
  • Drive by means of an electric motor, water turbine or hydraulic means are other possible, alternative methods.
  • the material is moved about as it passes the movable member. This means that the material is subjected to a motion which rearranges the material so that a maximum part of the material will become brushed. This prerequisites that the material is of such a fragmental sort that this can occur, which is the case with shingle and macadam.
  • prewashing of the material is included, and according to another embodiment it includes finishing rinsing of the material.
  • prewashing and finishing rinsing take place at a pressure of approximately 20-25 bars, and with rotating nozzles.
  • the invention also comprises an embodiment of the method, which embodiment includes the supply of a capillary rise reducing medium. Preferably this is done after the rest of the washing steps have been finished or in connection with a finishing rinsing step.
  • a capillary rise reducing medium As related to, it acquires a significantly smaller capillary rise tendency than if this had not been the case.
  • the object of the present invention is also to provide a device which leads to reduction of the consumed amount of liquid in comparison with prior art during the spraying of a material, and that an equivalent or even better spraying result is obtained.
  • the device is characterized in that it comprises nozzles rotatable in relation to the movable member.
  • these first nozzles are of a sort that will be further described later.
  • These nozzles obtain a high rotational speed as they are flowed through by a spraying medium under high pressure.
  • the rotating jets preferably of water, slung out from the nozzle under high pressure get a brushing effect through their circulating motion.
  • they also provide a larger spray image than conventional nozzles, thereby requiring a smaller number of nozzles in comparison to the prior art.
  • the device is characterized in that it also comprises second nozzles for the supply of a prewashing medium to the material.
  • These nozzles are arranged before the movable member, as seen in the material advancing direction, i.e. the material which is to be washed passes these nozzles before it passes the movable member.
  • these nozzles are rotatably designed, which implies the advantage of fewer nozzles being required and the amount of water consumed being reduced.
  • the device according to the invention is characterized in that it comprises third nozzles, intended for the supply of a rinsing medium to the material.
  • these third nozzles are arranged after the movable member, as seen in the material advancing direction, i.e. the washed material is confronted to the medium sprayed from these nozzles after it has passed or been passed by the movable member.
  • these nozzles are also rotatably designed to give the best possible rinsing effect and the smallest possible consumption of medium.
  • this medium is water or, when a small capillary rise is requested, water with the addition of a capillary rise reducing means.
  • Another embodiment of the device according to the invention is characterized in that said device comprises fourth nozzles for the supply of a capillary rise reducing means to the material, and in still another embodiment the third and fourth nozzles are identical, i.e. they are located at the same site in the device and supply the material with an identical mixture of rinsing medium and capillary rise reducing means.
  • the nozzle comprises a fixed part and a rotatable part.
  • the design of the latter is such that the rotatable part comprises a first rotating means, which, by means of force action from the medium flowing through the nozzle, is intended to set the rotatable part in rotation.
  • the nozzle is characterized in that the first rotating means is a turbine-like member arranged inside the rotatable part.
  • turbine-like member is here referred to as, by way of example, a member provided with a turbine blade, which member is arranged inside the rotatable part and sets the latter in rotation when it is subjected to a flow of a medium.
  • the first rotating means is a member shaped as a spiral or a thread of a screw and arranged inside the rotatable part
  • the nozzle comprises a second rotating means to set the medium passing through the fixed part in a rotating motion.
  • this rotating means comprises a member shaped as a spiral or a thread of a screw and is arranged in the fixed part.
  • the two spiral-shaped members are preferably arranged with their pitches in different directions.
  • Fig 1 shows, schematically, a plan sifter 1 comprising a movable member 2 in the form of a rotatable wing which is supplied with a medium via a centrally located inlet 3 and which is provided with outlets 4 in the form of nozzles that are rotatable in relation to the wing, to spray out the medium in question onto a material 5 which is to be washed.
  • a preferred embodiment of such a nozzle will be discussed more in detail later.
  • the medium is water or a water-air mixture.
  • the device comprises a sieving grate 6 on which the material is supposed to be conveyed.
  • the sieving grate 6 slopes downwards in the advancing direction of the material to facilitate the conveying of the latter.
  • the sieving grate 6 is equipped with a member 7 that moves about or reorganizes the material. This moving about preferably occurs just before the central position of the movable member 2, as seen in the material advancing direction.
  • the member 7 is a cam arranged on the sieving grate.
  • the rate of rotation is 1-1,5 rotations per second.
  • the device according to this preferred embodiment is provided with nozzles 8, 9, before as well as after the movable member, as seen in the material advancing direction.
  • nozzles 8, 9, before as well as after the movable member, as seen in the material advancing direction are of a rotatable sort to minimize the number of nozzles required and the amount of water consumed.
  • the nozzles 8 located before the movable member 2 are intended for the prewashing of the material, the latter being supplied with a prewashing medium.
  • the nozzles 9 located after the movable member 2 are intended for the finishing rinsing, the material being supplied with a means for finishing rinsing, preferably water.
  • These nozzles 8, 9 are arranged on two carriers 10, 11 respectively, which, according to Fig 2, are supplied with water via separate supply lines 13, 14. Accordingly, in the preferred embodiment, a row of nozzles is arranged on each carrier.
  • a pressure of 20-25 bars is enough for the medium used in the nozzles 8, 9 respectively for prewashing and finishing rinsing, while the pressure of the medium in the movable member 2 preferably is at least 40 bars.
  • another row of nozzles 15 is arranged after the nozzles 9 for finishing rinsing, as seen in the material advancing direction. These spray the washed material with a capillary rise reducing means, "capillary stop”.
  • Fig 3 shows a preferred embodiment of a rotatably designed nozzle 26.
  • this nozzle has a fixed part 27 and a rotatable part 28.
  • both parts present a cylindrical design, one of the parts, in this case the rotatable one, being partially positioned on the outside of the other one.
  • a bearing member (not shown) permits the rotatable part to rotate in relation to the fixed one, and at the same time prevents it from gliding off the fixed part in the lengthwise direction.
  • the rotatable part comprises a first rotating means 29, which, through force affection of a medium flowing through the nozzle 26, is intended to set the rotatable part 28 in rotation.
  • this rotating means 29 is comprised by a spiral-shaped member arranged in the rotatable part.
  • the latter can be compared to a part with the shape of a screw thread and is fixedly arranged in the rotatable part 28. Accordingly, a medium flowing through the nozzle 26 will suggest to turn the rotatable part as it hits this first rotating means 29.
  • the fixed part 27 has a spiral-shaped, second rotating means 30.
  • the second rotating means 30 is a spiral-shaped member, the direction of thread of which is opposite to that of the rotating means 29 arranged in the rotatable part. This makes the medium conveyed in the nozzle 26 rotate in a certain direction.
  • the rate of rotation is varied.
  • the free end piece 31 of the rotatable part, and thereby of the nozzle, is releasably arranged on the rotatable part 28, here by means of a threaded coupling 32.
  • This end piece 31 can thus be substituted to be replaced by another end piece, which as to shape, number of outlet openings, design and direction of the latters etc., differs from the former.
  • a movable member in the form of a rotating wing
  • a member which executes some other motion e.g. an oscillating one, in relation to the material being sprayed.
  • plan sifter can be designed in different ways, e.g. as a perforated conveyor band, sloping of the device no longer being required.
  • washing medium and the capillary rise reducing means is preferably comprised of water besides the active agents respectively.
  • a significantly reduced water consumption is obtained with a device according to the invention at a plan sifter for shingle or macadam.
  • the water consumption of the prior art is approximately 1000-200 litres/minute
  • the consumption for the device according to the invention is only in the order of 100-200 litres/minute.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Spray Control Apparatus (AREA)
  • Road Paving Machines (AREA)
  • Coating By Spraying Or Casting (AREA)

Claims (14)

  1. Procédé pour pulvériser un matériau (5), un organe mobile (2) muni de buses (4, 26) pour un agent de pulvérisation à fournir au matériau qui est en mouvement pendant la pulvérisation, la pulvérisation concerne le lavage et l'agent de pulvérisation est un agent de lavage,
    caractérisé en ce que les buses (4, 26) tournent relativement à l'organe mobile (2) pendant la pulvérisation.
  2. Procédé selon la revendication 1,
    caractérisé en ce que l'organe mobile (2) tourne pendant la pulvérisation.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que le matériau est déplacé tout en étant amené pour passer l'organe mobile (2).
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'il inclut un prélavage du matériau et/ou un rinçage de finition du matériau et/ou l'amenée d'un agent réduisant la remontée capillaire vers le matériau.
  5. Dispositif pour pulvériser un matériau comprenant un organe mobile (2) agencé de façon mobile, muni de premières buses (4, 26) pour un agent de pulvérisation, la pulvérisation concerne le lavage et l'agent de pulvérisation est un agent de lavage,
    caractérisé en ce que les premières buses (4, 26) peuvent tourner relativement à l'organe mobile (2).
  6. Dispositif selon la revendication 5,
    caractérisé en ce que l'organe mobile (2) est agencé de façon rotative.
  7. Dispositif selon l'une quelconque des revendications 5 - 6,
    caractérisé en ce qu'il comprend des deuxièmes buses (8) pour l'amenée d'un agent de prélavage au matériau et/ou des troisièmes buses (9), destinées à l'amenée d'un agent de rinçage au matériau et/ou des quatrièmes buses (15) pour l'amenée d'un agent réduisant la remontée capillaire vers le matériau.
  8. Dispositif selon la revendication 7,
    caractérisé en ce que les deuxièmes, troisièmes et/ou quatrièmes buses (8) sont conçues de façon rotative.
  9. Dispositif selon l'une quelconque des revendications 5 - 8,
    caractérisé par lesdites buses (4, 8, 9, 26) comprenant une partie fixe (17) et une partie rotative (28).
  10. Dispositif selon la revendication 9,
    caractérisé en ce que la partie rotative (28) comprend des premiers moyens de rotation (29) pour mettre la partie rotative (28) en rotation par l'intermédiaire d'une action de force à partir de l'agent de pulvérisation circulant à travers la buse.
  11. Dispositif selon la revendication 10,
    caractérisé en ce que les premiers moyens de rotation (29) sont un organe analogue à une turbine, agencé à l'intérieur de la partie pouvant tourner (28).
  12. Dispositif selon la revendication 10,
    caractérisé en ce que les premiers moyens de rotation (29) sont un organe en forme de spirale, agencé à l'intérieur de la partie pouvant tourner (28).
  13. Dispositif selon l'une quelconque des revendications 9 - 12,
    caractérisé en ce que ladite buse (4, 8, 9, 26) comprend des seconds moyens de rotation (30) pour entraíner l'agent de pulvérisation qui traverse la partie fixe (27) dans un mouvement de rotation.
  14. Dispositif selon la revendication 13,
    caractérisé en ce que les seconds moyens de rotation (30) de ladite buse (4, 8, 9, 26) comprennent un organe conformé en spirale, agencé dans la partie fixe (27).
EP94929710A 1993-10-05 1994-10-05 Procede, dispositif et composition pour aspersion de materiaux Expired - Lifetime EP0722366B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9303256A SE9303256D0 (sv) 1993-10-05 1993-10-05 Metod / användning / komposition vid materialtvättning
SE9303256 1993-10-05
PCT/SE1994/000925 WO1995009696A1 (fr) 1993-10-05 1994-10-05 Procede, dispositif et composition pour aspersion de materiaux

Publications (2)

Publication Number Publication Date
EP0722366A1 EP0722366A1 (fr) 1996-07-24
EP0722366B1 true EP0722366B1 (fr) 2001-07-04

Family

ID=20391321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94929710A Expired - Lifetime EP0722366B1 (fr) 1993-10-05 1994-10-05 Procede, dispositif et composition pour aspersion de materiaux

Country Status (6)

Country Link
EP (1) EP0722366B1 (fr)
AT (1) ATE202728T1 (fr)
AU (1) AU7866694A (fr)
DE (1) DE69427644D1 (fr)
SE (1) SE9303256D0 (fr)
WO (1) WO1995009696A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104971886A (zh) * 2015-07-28 2015-10-14 兖州煤业股份有限公司 一种脱介筛喷水装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2326316C (fr) * 1998-04-08 2007-11-13 De Beers Consolidated Mines Limited Procede et machine a traiter un conglomerat
NL1017770C2 (nl) * 2001-04-04 2002-10-10 Paulus Franciscus Joha Lambert Asbest-reiniging.
US9079222B2 (en) * 2008-10-10 2015-07-14 National Oilwell Varco, L.P. Shale shaker
ITMI20092291A1 (it) * 2009-12-23 2011-06-24 D E L Co S R L Impianto per la decontaminazione sicura di materiali non porosi contaminati superficialmente da pcb o da altre sostanze tossiche e nocive e procedimento utilizzante tale impianto
CN105381949A (zh) * 2015-11-26 2016-03-09 湖北鑫鹰环保科技股份有限公司 一种振动筛机除垢、防糊网的工艺方法
RU2659433C2 (ru) * 2015-12-17 2018-07-02 Александр Геннадьевич Михайлов Дезинтеграционное устройство
SI25470A (sl) 2017-07-26 2019-01-31 Brinox D.O.O. Rotor pomivalnega stroja

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE372395C (de) * 1920-09-10 1923-03-27 Karl Groeppel Dipl Ing Verfahren zur Trennung eines Gutes von seinen erdigen, tonigen oder lettigen Beimengungen durch Abbrausen
DE927741C (de) * 1952-10-24 1955-05-16 Huettenwerke Ilsede Peine Ag Verfahren zur Laeuterung von Erzen mit tonkieselsaeurehaltigen Bindemitteln
SE437937B (sv) * 1981-09-04 1985-03-25 Ernst Lennart Wallman Med Firm Dimmunstycke for brandbekempning medelst vatten
GB8612498D0 (en) * 1986-05-22 1986-07-02 Mozley R H Minerals separator
EP0548408A1 (fr) * 1991-12-27 1993-06-30 K.E.W. Industri A/S Tête à jet pour le nettoyage à haute pression
US5282575A (en) * 1992-04-24 1994-02-01 Dorr-Oliver Incorporated High pressure screen shower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104971886A (zh) * 2015-07-28 2015-10-14 兖州煤业股份有限公司 一种脱介筛喷水装置

Also Published As

Publication number Publication date
AU7866694A (en) 1995-05-01
SE9303256D0 (sv) 1993-10-05
WO1995009696A1 (fr) 1995-04-13
DE69427644D1 (de) 2001-08-09
ATE202728T1 (de) 2001-07-15
EP0722366A1 (fr) 1996-07-24

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