EP3736376B1 - Procédé d'imprégnation et de traitement ultérieure de matières en vrac - Google Patents

Procédé d'imprégnation et de traitement ultérieure de matières en vrac Download PDF

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Publication number
EP3736376B1
EP3736376B1 EP20173480.3A EP20173480A EP3736376B1 EP 3736376 B1 EP3736376 B1 EP 3736376B1 EP 20173480 A EP20173480 A EP 20173480A EP 3736376 B1 EP3736376 B1 EP 3736376B1
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EP
European Patent Office
Prior art keywords
impregnating agent
ballast stones
ballast
stones
liquid
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.)
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Application number
EP20173480.3A
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German (de)
English (en)
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EP3736376A1 (fr
EP3736376C0 (fr
Inventor
Jörg Frenzel
Walter Münch
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.)
Hyperion BV
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Hyperion BV
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Publication of EP3736376A1 publication Critical patent/EP3736376A1/fr
Application granted granted Critical
Publication of EP3736376B1 publication Critical patent/EP3736376B1/fr
Publication of EP3736376C0 publication Critical patent/EP3736376C0/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/06—Renewing or cleaning the ballast in situ, with or without concurrent work on the track
    • E01B27/10—Renewing or cleaning the ballast in situ, with or without concurrent work on the track without taking-up track

Definitions

  • the present invention relates to a method and a device for cleaning ballast stones from an old track bed and producing a new track bed.
  • Contamination of gravel occurs through fine components after installation, deposits from the air, deposits from transport (coal, ore, other pollution), rising fine particles from the subsoil, vegetation residues, fine particles resulting from abrasion of the grains under traffic load, abrasion from plugging
  • the entry of impurities into the ballast can also lead to the following chemical contamination: heavy metals (wheels, rail brakes, pantographs, overhead lines), hydrocarbons (lubricants, switch and wheel flange lubrication), herbicides from wild growth control, organics from dead, rotting plant parts
  • the new gravel delivered already contains fines due to the manufacturing process in the delivery factory and the loading processes. These fines can amount to more than 3% of the new gravel material. Through sedimentation (sedimentation of the fine particles during the transport of the new gravel as sediment which causes unwanted accumulation in the gravel bed on the construction site).
  • the US 2013/206853 A1 discloses a stone-shaped ballast for railway tracks, in which a matrix of stones is bonded to a rubber mixture using an adhesive.
  • the JP H10 279340 A discloses digging out the ballast stones of the old track bed, bringing the ballast stones into contact with an impregnating agent in such a way that the surface of the ballast stones is coated or wetted with the impregnation agent, and producing a new track bed from the ballast stones thus obtained.
  • the EP 3 061 867 A1 discloses forming a polymer layer around individual gravel stones and bonding this polymer layer to granular elastomeric materials.
  • the invention is based on the problem of a method for cleaning ballast stones from an old track bed and the production of a new track bed indicate where the above problems can be reduced or avoided.
  • the wetting of the surface can be complete or substantially complete.
  • the impregnating agent has the property of binding fine particles, preferably after removal of a liquid phase in which it is present when applied. Fine particles adhere to the impregnating agent. Furthermore, the impregnating agent prevents fine particles from abrasion from the bulk material. Fine particles are understood to mean, in particular, particles that form dust and/or particles that are significantly smaller than the bulk grains (for example the finest basalt particles/basalt fibers in the case of gravel stones made from basalt). Fine particles are in particular particles with a diameter of ⁇ 5 mm, preferably ⁇ 1 mm, more preferably ⁇ 500 ⁇ m, even more preferably ⁇ 100 ⁇ m, or ⁇ 50 ⁇ m, most preferably ⁇ 10 ⁇ m. If there are different diameters in different directions, the longest diameter is used.
  • the impregnating agent can be a solid or a liquid or contained in a liquid.
  • the impregnating agent can be distributed in a liquid phase, in particular dissolved, emulsified or suspended.
  • the impregnating agent is a liquid impregnating agent and in step a) and/or b), drying takes place after the large number of bulk material grains have been brought into contact with the impregnating agent.
  • the liquid phase can be removed after application to the surface of the gravel stones, for example by drying, in particular evaporation. Drying can be accelerated by introducing conditioned air (heat, cold, natural ventilation). After drying, the impregnating agent remains on the surface of the gravel stones. Not all waterproofing agents used necessarily remain on the surface. There may be an excess that does not remain on the surface
  • step d) the contact is brought into contact by immersing, watering, sprinkling or spraying the gravel stones.
  • a liquid impregnating agent is used or an impregnating agent contained in a liquid phase.
  • immersing, watering, sprinkling or spraying the gravel stones drying can take place. This will be discussed elsewhere. For example, a liquid phase can be removed here.
  • Immersion can be done using an immersion bath.
  • Sprinkling or spraying can be carried out using a spray arc/spray bar.
  • the method has the step before and/or after the above-mentioned step d): washing the gravel stones to remove solids/fines that adhere to or are located in/on them, in particular fine particles mentioned.
  • Substances that can be removed by washing can be selected, for example, from clay, silt, fine particles, wood and coal, humus, in particular fine particles made of the same material as the gravel stones or substances that are present in the bulk grain.
  • Washing is preferably carried out with water or an aqueous liquid, which may contain other additives in addition to water. Washing can be done by dipping, watering, sprinkling or spraying the gravel stones with a Washing liquid, in particular water mentioned, takes place. Alternatively, wind/vibration separation is also conceivable.
  • washing serves primarily to remove contamination that has already adhered, in particular adhering dust-forming particles.
  • washing serves primarily to remove excess impregnating agent or fines that are not permanently enclosed by the impregnation, in particular the fine particles mentioned above.
  • Water used for washing can be processed in a further process step, in particular by cleaning.
  • the water used for washing is contaminated with the substances or particles washed off.
  • inclined clarifiers or lamella clarifiers can be used, which offer a cost-effective, space-saving and efficient alternative to washing water treatment.
  • Such devices are offered by the Leiblein company. Washed-off solids settle within the plate packs and are collected in a sludge funnel. The purified water (clear water) is returned to the washing process. In order to increase the clear water content, the sedimented solids can be further dewatered using a vacuum belt filter.
  • the vacuum belt filter is a cost-effective and space-saving alternative to the commonly used chamber filter presses. This is also the case, for example, in the area of track-based ballast processing (https://www.leiblein.de/loesoder/kies-undsandindustrie.html).
  • the method comprises: cleaning an excess liquid which consists of the impregnating agent or has the impregnating agent.
  • such liquid which consists of the impregnating agent or has the impregnating agent, can be used in excess of the gravel stones, even independently of this embodiment.
  • step d) of the process such excess liquid remains.
  • This excess liquid can be just as contaminated as the water used for washing mentioned above.
  • the liquid mentioned can be cleaned in an analogous manner.
  • the gravel stones can be completely submerged in the liquid.
  • the gravel stones can be transported by the liquid.
  • the liquid can be provided in the form of an immersion bath.
  • the liquid has the impregnating agent and a liquid phase.
  • the impregnating agent can be dissolved, emulsified or suspended in a liquid phase.
  • the liquid phase is removed.
  • the liquid can be in a container.
  • the gravel stones can be brought into contact with the liquid in the container. In other words, the gravel stones can be passed through this container and the liquid it contains.
  • the gravel stones can be passed through the liquid, for example, by means of a movable means of transport, in particular a conveyor belt, a transport basket or a chute.
  • the movable transport means can be moved relative to the liquid.
  • the liquid is stationary and the transport means is moved so that the transport means is moved or guided or guided through the liquid.
  • the aforementioned embodiment can be carried out on a movable bulk material processing system, for example as part of a ballast cleaning machine or a temporary ballast processing area, as is used, for example, in the course of track construction reconstruction measures.
  • This transport can be carried out in particular by means of a previously mentioned movable means of transport.
  • This movable means of transport can be designed in such a way that it allows liquid to flow through.
  • a movable conveyor belt can have holes or separate the excess liquid from the gravel stone using centrifugal or attractive force.
  • Said draining basin can have a return device which is designed to return the excess liquid collected in the dripping basin to where the bulk material grains are passed through the liquid.
  • the excess liquid can be introduced into the container mentioned above, through which the bulk material grains are passed, and there can be combined with the liquid already present.
  • the excess liquid can be returned to an immersion bath through which the bulk material grains are passed.
  • the liquid is cleaned before such recirculation, in particular by filtering, settling or the cleaning process already mentioned above.
  • the rotating drum can have a liquid reservoir.
  • the liquid reservoir can be encapsulated or encapsulated.
  • the rotary drum may have a feed opening and an emptying opening, or an opening intended for both functions. This can contain a transport screw.
  • the rotary drum can be provided locally on a mobile basis.
  • the rotary drum can be coupled to a vehicle and/or be mobile.
  • the rotating drum can be coupled to a large machine, such as an excavator, wheel loader, truck similar to a concrete mixer, etc.
  • the method is carried out together with a bed cleaning process, preferably directly before (preceding process) a bed cleaning process and/or within a bed cleaning process, and/or directly after (as a subsequent process) a bed cleaning process.
  • the process is carried out within a ballast cleaning machine. This will be discussed further below.
  • the impregnating agent has one or more of the following substances, which are selected from the group consisting of acrylate, silicate, polyurethane, polyurea, synthetic resin, in particular acrylic resin, silicone.
  • the gravel stones can be brought into contact with fibers at the same time as they are brought into contact with the impregnating agent. Bringing the gravel stones into contact with fibers can instead take place separately from bringing them into contact with the impregnating agent, preferably afterwards, which is preferably in a cover layer.
  • Waterproofing agent and fibers can be present as a solid mixture. Waterproofing agent and fibers can instead be present in a liquid phase. The liquid phase can be removed as mentioned above, leaving impregnating agents and fibers on the surface of the gravel stones.
  • the fibers can be present in a liquid phase. After applying the liquid containing the fibers, the liquid phase can be removed, in particular by drying, so that the fibers remain.
  • the fibers can increase the surface area of the gravel stones in order to better bind dust-forming particles.
  • the fibers are made of an electrostatically chargeable material.
  • the fibers are preferably synthetic fibers. If the fibers are electrostatically chargeable, fine particles can stick to them even better after they have been charged. Charging can occur, for example, through friction, for example during the processing of the ballast stones, for example during transport or processing or in the course of grain rearrangement due to driving dynamics in the environment of regular train journeys/movements.
  • An advantage of this aforementioned embodiment in connection with gravel is that after the applied gravel has been introduced, abrasion and fines caused by the dynamics and abrasion from the rolling stock (e.g. brake dust and abrasion from contact wire and pantograph and trickle losses and abrasion from grain rearrangement) continue to be removed. be tightened and adhere to the gravel. Such adhesions can be washed off or vacuumed off in a later step become. If the bulk material grains are processed into a bed, for example a gravel factory, washing can ensure that the adhesions are removed from the bulk material grains lying on top and transported to the bulk material grains located further inside the bed. This effectively reduces the swirling up of adhesions caused by air convection, for example air convection such as that which occurs when a rail vehicle drives over a track bed or in the course of air movements that typically occur due to temperature differences within tunnels.
  • air convection for example air convection such as that which occurs when a rail vehicle drives over a track bed or in
  • the fibers are coated with a water-repellent agent, preferably impregnated with oil or wax, which is preferably biodegradable over a defined period of time.
  • the aforementioned method can be carried out, for example, integrated in a ballast cleaning machine or as a (leading) supplementary machine unit to a ballast cleaning machine that is set up to carry out the method according to the invention.
  • impregnation also takes place before the gravel stones of the track bed are excavated, also referred to as pre-impregnation.
  • a further or renewed impregnation then represents the renewed contact of the gravel stones with an impregnating agent after the gravel has been separated from the overburden.
  • a liquid that contains the impregnating agent can at the same time be a conveying liquid.
  • Bulk material grains can be brought into contact with the liquid and can also be transported in the liquid, for example within a device according to the invention, which is described below.
  • ballast stones are used. These are also reclaimed and recycled ballast stones, as they come from an existing track bed and have been cleaned according to the process.
  • additional ballast stones can be added or added, ie ballast stones that were not previously present in the track bed.
  • These newly supplied gravel stones can have been previously impregnated by bringing them into contact with an impregnating agent in such a way that the surface of the bulk material grains is coated or wetted with the impregnating agent.
  • an impregnating agent in such a way that the surface of the bulk material grains is coated or wetted with the impregnating agent.
  • a device which is set up to carry out a previously disclosed method for impregnation and further processing of a bulk material and/or a previously disclosed method for cleaning ballast stones of an old track bed and producing a new track bed. Reference is made in full to the disclosure of these procedures.
  • the device can be set up to carry out any specific embodiment of these methods, individually or in combination.
  • the device is a ballast cleaning machine or a tamping machine or track tamping machine.
  • the device is a profiling unit or profiling machine. With such a unit or machine, a track bed is (re) brought into a desired profile.
  • Fig. 1 shows a device for bringing a large number of bulk material grains into contact with an impregnating agent in such a way that the surface of the bulk material grains is coated or wetted with the impregnating agent and the corresponding method step a) of bringing into contact.
  • the bulk grains 10 in this case are gravel stones.
  • the gravel stones 10 are dropped from the funnel bunker 1 onto the first conveyor belt (alternatively a screw) 11.
  • the conveyor belt 11 moves diagonally upwards in the direction of the arrow and transports the gravel stones 10 accordingly.
  • these are sprinkled with water 13 using the first spray bar or arch 2 in order to wash them of adhering impurities and fine particles.
  • the water 13 can be collected, cleaned and recycled and returned to the spray bar 2, which is not shown in more detail here.
  • the ballast stones 10 fall onto a second conveyor belt (alternatively a screw/paddle wheel/rotary drum) 14, which in turn transports the ballast stones 10 diagonally upwards.
  • a second conveyor belt alternatively a screw/paddle wheel/rotary drum
  • these are sprinkled with liquid impregnating agent 15 using the second spray bar 3.
  • Excess impregnating agent 15 runs down into the sinking basin 4.1 and is collected there.
  • the separated fine material can also be used in construction processes.
  • the now impregnated gravel stones 10' fall from the second conveyor belt 14 into the storage bunker 4 for the impregnated gravel stones 10'.
  • This storage bunker 4 also functions as a draining basin. Further excess impregnation agent 15 can drip off there and flow into the sink basin 4.2 through the drain line 16.
  • the aforementioned sinking basin 4.1 is connected to the sinking basin 4.2 via the Pipe 17 connected so that excess impregnating agent 15 can be transferred from there into the sinking basin 4.2.
  • Excess impregnating agent 15 can be drained off through the outlet nozzle 4.3 and fed to cleaning steps not shown in more detail. The cleaned impregnation agent 15 can then be fed back to the spray bar 3.
  • the impregnated gravel stones 10' can be fed to the transport units 5.1 (here trailer/loading area of a truck 18, alternatively a wagon of a rail vehicle) via a conveyor belt (not shown) or a screw (not shown) via the distribution conveyor belt 5.
  • a drying device 19 in the form of a blower, from which (if necessary conditioned) air 20 is blown out to dry the impregnated gravel stones 10'. If applicable.
  • a further washing process for the gravel material can be provided as an intermediate step after passing through the drying device 19 and before leaving the distribution conveyor belt 5.
  • ballast stones 10' are transported to a track construction site in order to produce a fill in the form of a ballast bed. This is not shown further.
  • Fig. 2 shows the ballast cleaning machine 100. This is composed of several units, which will be mentioned below. Due to the length of the ballast cleaning machine 100, it is shown in the figure in lines with breaks, with the beginning at the top left and the end (not completely shown) at the bottom right. Graphic cuts have also been made at the ends of the lines through the units (dashed lines). The direction of work along a track is shown by the arrow pointing to the left at the top left under the drive car 30.
  • the impregnation trolley 40 has facilities for carrying out the impregnation of gravel.
  • a tank 41 and an impregnation unit 42 are shown.
  • the gravel sieve truck 50 has the vibrating sieve 51, the washing sieve 52, the impact crusher 53, the metal separator 54 and the finger sieve 55.
  • the excavation machine 60 has the gravel excavation chain 61, the subgrade excavation chain 62, the sand distribution bar 63, the plate compactor 64, the scooping device 65, the tamping units 66, the gravel outlet hoses 67 and the tamping machine 68.
  • the drive car 70 has the new gravel silo 71.
  • the double-decker car 80 has the additional new ballast silo 72.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Claims (10)

  1. Méthode de nettoyage des ballasts d'une ancienne plate-forme et de production d'une nouvelle plate-forme, comprenant :
    a) pré-imprégner les ballasts de l'ancienne plate-forme avec un agent d'imprégnation de manière à ce que la surface des ballasts soit recouverte ou mouillée par l'agent d'imprégnation, et ensuite
    l'agent d'imprégnation, et ensuite
    b) l'excavation des pierres de ballast de l'ancienne plate-forme de la voie ferrée
    c) séparation du ballast des morts-terrains
    d) mise en contact des ballasts isolés avec un agent d'imprégnation de manière à ce que la surface des ballasts soit recouverte ou mouillée par l'agent d'imprégnation,
    e) la production d'une nouvelle plate-forme de voie à partir des pierres de ballast ainsi obtenues.
  2. Méthode selon la revendication 1, dans lequel, à l'étape a) et/ou d), la pluralité de ballasts est mise en contact avec l'agent d'imprégnation.
    les ballasts sont mis en contact avec un liquide comprenant l'agent d'imprégnation et une phase liquide, et la phase liquide est éliminée de sorte qu'un film ou une couche de l'agent d'imprégnation reste à la surface des ballasts.
  3. Méthode selon la revendication 1, dans laquelle l'agent d'imprégnation est un liquide et dans l'étape a) et ou d) après avoir mis en contact le ballast avec l'agent d'imprégnation, les ballasts sont séchés.
  4. Méthode selon l'une des revendications précédentes, dans lequel, à l'étape d), la mise en contact des pierres de ballast s'effectue par immersion, arrosage, saupoudrage ou pulvérisation des pierres de ballast.
  5. Méthode selon la revendication 4, dans laquelle la mise en contact comprend les étapes suivantes :
    - faire passer les pierres de ballast au moyen d'un transport continu
    - à travers un liquide comprenant l'agent d'imprégnation,
    - séparation de l'excès de liquide des pierres de ballast
    - séchage partiel ou complet des pierres de ballast.
  6. Méthode selon l'une des revendications précédentes, comprenant en outre, avant l'étape d) et/ou après l'étape d), l'étape de lavage des pierres de ballast.
  7. Méthode selon la revendication 4, dans lequel la mise en contact comprend les étapes suivantes :
    - placer les pierres de ballast dans un tambour rotatif contenant l'agent d'imprégnation,
    - faire tourner le tambour rotatif pour que les pierres de ballast soient mises en contact avec l'agent d'imprégnation.
  8. Méthode selon l'une des revendications précédentes, caractérisé par le fait que le procédé est mis en oeuvre en même temps qu'un procédé de nettoyage du lit.
  9. Méthode selon l'une des revendications précédentes, dans lequel l'agent d'imprégnation comprend une ou plusieurs des substances suivantes choisies dans le groupe constitué par l'acrylate, le silicate, le polyuréthane, la polyurée, la résine synthétique, en particulier la résine acrylique, la silicone.
  10. Méthode selon l'une des revendications précédentes, comprenant la mise en contact des pierres de lest avec des fibres qui, après enduction ou mouillage de la surface par l'agent d'imprégnation, dépassent au moins partiellement d'une surface obtenue après enduction ou mouillage.
EP20173480.3A 2019-05-10 2020-05-07 Procédé d'imprégnation et de traitement ultérieure de matières en vrac Active EP3736376B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019206841.3A DE102019206841A1 (de) 2019-05-10 2019-05-10 Verfahren zur Imprägnierung und Weiterverarbeitung von Schüttgut

Publications (3)

Publication Number Publication Date
EP3736376A1 EP3736376A1 (fr) 2020-11-11
EP3736376B1 true EP3736376B1 (fr) 2024-03-20
EP3736376C0 EP3736376C0 (fr) 2024-03-20

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Application Number Title Priority Date Filing Date
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EP (1) EP3736376B1 (fr)
DE (1) DE102019206841A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD114249A5 (fr) * 1974-11-01 1975-07-20
JPH10279340A (ja) * 1997-03-31 1998-10-20 West Japan Railway Co フォームドアスファルトによる軌道用材料及び軌道並びにその製造方法及び施工方法
DE20112865U1 (de) * 2001-08-02 2001-10-04 Hermann Wiebe Grundstücks- und Maschinenanlagen GmbH & Co. KG, 27313 Dörverden Verfahrbare Gleisbaumaschine
DE102005027551A1 (de) * 2005-06-14 2006-12-21 Basf Ag Verfahren zur Herstellung eines Verbundstoffes aus Steinen und einem Kunststoff
US9200412B2 (en) * 2012-02-10 2015-12-01 Pci-Trammco, Llc Railway stone ballast and related systems and methods
ES2536584B1 (es) * 2013-10-23 2016-03-01 Universitat Politècnica De Catalunya Balasto desagregado con durabilidad y resistencia a la fragmentación mejoradas y procedimiento de obtención del mismo

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DE102019206841A1 (de) 2020-11-12
EP3736376C0 (fr) 2024-03-20

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