METHOD AND DEVICE FOR CLEANING THE SURFACE OF A CONVEYOR BELT FOR RAW MATERIAL WASTE AND TAILINGS EXTRACTED IN MINING

Abstract

Method and device for cleaning a conveyor belt surface of waste raw materials and tailings extracted in mining. The invention relates to a method for cleaning a surface (6) of a conveyor belt (2), which moves in a direction of movement (16), of waste mining materials, comprising the following steps: a) admitting the surface (6) with an infinity of fluid jets (5) at an operating pressure of at least 30 bar and at an angle of incidence (8) of less than 90º against the direction of movement (16) for the removal of the waste; b) removing at least part of the fluid from the surface (6). Fig. 4

Description

1 / 18 METHOD AND DEVICE FOR CLEANING THE SURFACE OF A CONVEYOR BELT FOR RAW MATERIAL WASTE AND TAILINGS EXTRACTED IN MINING

[0001] The object of this invention is a method and a device for cleaning the surface of a conveyor belt of waste raw materials extracted in mining, such as ores and / or coal and tailings.

[0002] Conveyor belts are generally used for transporting raw materials and tailings extracted in mining, for example, to transport these materials from a raw material extraction site to a processing site, or to transport these materials from a bunker to a loading site. The corresponding conveyor belts are specially adapted to the conditions during the transport of raw materials and tailings, in particular with regard to the material, surface, length, width and design of the conveyor belts. These belts are often operated with lengths of one kilometer or more.During the transport of raw materials or waste, dust generation is a regular problem. The dust that is produced is released into the environment. Dust arises, among other places, on the support rollers, reversing rollers, or drive rollers through which the conveyor belt is guided, since the adhesives on the conveyor belt are rubbed there.

[0003] Conveyor belt scrapers are known for removing these adhesions, for example, from Petition 870240025820, dated 03 / 25 / 2024, page 20 / 74 2 / 18 German patent document DE 10 2011 016 954 A1. In particular, during the transport of raw materials extracted from mining, they have proven to be disadvantageous, since with conveyor belt scrapers it is not possible to almost completely remove the aforementioned adhesions from the conveyor belt.

[0004] Furthermore, a method is accepted as known, in which the conveyor belt is sprayed with water on one side in order to wet the coating. In this case, it has been found that this method does not lead to the most comprehensive removal of adhesions possible and, at the same time, in particular, the conveyor belt's supporting structures are exposed to more intense corrosion.

[0005] Based on this, the present invention has the task of overcoming the known disadvantages of the prior art, at least partially, and in particular, indicating a method and a device by which a conveyor belt can be cleaned simply and effectively of residues of raw materials extracted in mining and, in this case, avoid corrosion in particular of the conveyor belt's support structures.

[0006] This task is solved by the features of the independent claims. Other advantageous embodiments of the invention are indicated in the dependent claims. The features presented individually in the dependent claims can be combined with each other in a technologically sensible way and can define other embodiments of the invention. Furthermore, the features indicated in the claims are specified and clarified in more detail, such that, Petition 870240025820, dated 03 / 25 / 2024, page 21 / 74 3 / 18 represent other preferred embodiments of the invention.

[0007] As a precaution, it should be noted that the numerals used here (first, second, ...) mainly serve (only) to distinguish between several similar objects, sizes or processes, therefore, in particular, they do not necessarily intend any dependence or sequence of these objects, sizes or processes to each other. If a dependence and / or sequence is necessary, this will be explicitly indicated here or becomes obvious to the specialist during the study of the specifically described execution method.

[0008] The method according to the invention for cleaning the surface of a conveyor belt, moving in one direction, of residues of materials extracted from mining, in particular, raw materials and / or extracted mining tailings, comprises the following steps: a) Admitting fluid to the surface with a multitude of jets at an operating pressure of at least 30 bar and at an angle of incidence of less than 90° against the direction of movement for the removal of debris; b) removal of at least some of the fluid from the surface.

[0009] A conveyor belt is understood to be an endless belt that runs on support rollers and drive rollers, and which simultaneously serves as a means of support and traction. In particular, the conveyor belt has a carcass, which comprises textile or metal cable inserts, which transmit tensile forces. Petition 870240025820, dated 03 / 25 / 2024, page 22 / 74 4 / 18 This carcass is preferably encased in a lining. This carcass for conveyor belts is encased in a lining for transporting extracted raw materials and / or mining waste such as, for example, ores or coal, which is encased in elastomer materials, in particular, with a thickness of 10 mm to 70 mm [millimeters]. The conveyor belt is preferably part of a conveyor system, in particular, of a conveyor belt or belt conveyor. A conveyor system is understood, in particular, as a device comprising at least one drive roller, at least one support roller and at least two diverter stations, which are supported by a support structure and guide the conveyor belt.

[0010] The angle of incidence of the fluid jets is less than 90°, and the fluid jets are directed against the direction of movement.The angle of incidence is selected, preferably between 20° and 60°. Particularly high cleaning efficiencies can be obtained within this angle range.

[0011] Preferably, the conveyor belt surface before step a) is guided through at least one mechanical coarse scraper (primary and / or secondary scraper) for scraping off coarse debris.

[0012] A coarse mechanical scraper is understood, in particular, to be a type of lip that is placed in contact with the surface of the conveyor belt. This lip is made, in particular, of a synthetic elastomer material, in particular polyurethane (PU) and / or of a metal, in particular comprising tungsten carbide (WC), for example, Petition 870240025820, dated 03 / 25 / 2024, page 23 / 74 5 / 18 as a synthetic material element with a metallic edge. By means of guiding the surface through the coarse mechanical scraper, coarse surface residues are scraped off, in particular, such that downstream of this coarse scraper there remain residues that cannot be removed by means of a coarse mechanical scraper.

[0013] Fluid jets are generated by nozzles, which direct the fluid jet onto the surface. The nozzles are pressurized, in particular with a fluid such as water. Cleaning additives may also be added, selected according to the corresponding raw material. The fluid jets are preferably produced as fluid cones, which have an angle of incidence. Preferably, nozzles that produce fluid cones of this type are used. In particular, in the case of a fluid cone, the angle of incidence is understood as the angle between the axis of the cone and the tangent of the surface at the point of incidence of the cone axis.

[0014] Preferably, as many fluid jets are used as possible to cover the entire width of the conveyor belt. In particular, the fluid jets are used in such a way that they do not overlap in the jet, so as not to alter the desired direction of the fluid jet's thrust due to overlap. Therefore, in relation to their fluid cone opening angle and in relation to the distance from the surface, the corresponding nozzles and alignment are preferably adapted accordingly.

[0015] The alignment of the fluid jets with respect to the surface is immutable over time; in particular, this means that the fluid jets are not moved in Petition 870240025820, dated 03 / 25 / 2024, page 24 / 74 6 / 18 in relation to the surface. Therefore, there is an angle of incidence that is selected, such that an ideal cleaning effect can be obtained in step a).

[0016] In step b) of the method, any remaining residue buildup alongside the fluid is removed, which in step a) of the method may have been loosened but not removed.

[0017] The conveyor belt surface is understood to be the support surface of the conveyor belt. Due to the surrounding movement through the drive rollers, the support rollers and the diverter stations, the support surface and, with it, the conveyor belt surface is always exposed, so that preferably a cleaning of the conveyor belt surface can occur if that belt is no longer occupied with goods to be transported, but only residues remain, for example, in the area of ​​the diverter stations or in the lower area of ​​the conveyor belt.

[0018] Step b) of the method is performed, preferably using an adhesion roller, possibly in combination with at least one scraper lip. An adhesion roller is understood to be a roller through which the conveyor belt is guided and which is pressed onto the conveyor belt. The moisture on the conveyor belt is adhesively bound to the adhesion roller; through centrifugal forces, the moisture is removed from the adhesion roller again when this roller is no longer in contact with the conveyor belt. The corresponding fluid droplets are collected, preferably in a collection tank, and discharged. Through this method of execution Petition 870240025820, dated 03 / 25 / 2024, page 25 / 74 7 / 18 can achieve efficient drying of the conveyor belt.

[0019] The method described here allows for efficient cleaning of the conveyor belt. At the same time, the cleaned belt is guided through the other drive rollers and transport rollers without abrasion from the residue (which is then no longer present). Consequently, dust that arises due to abrasion on the rollers does not occur, thus achieving effective dust reduction.

[0020] According to an advantageous embodiment, the fluid jets have an opening angle of 20° to 60°.

[0021] An opening angle of 20° to 60° leads to a high incidence impulse on the conveyor belt and thus to efficient cleaning. The use of fluid jets with different opening angles is possible according to the invention.

[0022] According to an advantageous embodiment, the fluid comprises water. The use of water is particularly preferred, since in this case, a standard high-pressure pump and standard high-pressure lines can be used, and apart from filtration, no other measures need to be taken to clean the fluid. Furthermore, the release of water into the environment is possible without major problems, without any other precautions having to be taken.

[0023] According to one embodiment, after step a) and, in particular, before step b) the surface of the conveyor belt is guided by a thin mechanical scraper. Petition 870240025820, dated 03 / 25 / 2024, page 26 / 74 8 / 18

[0024] Through the thin mechanical scraper, which is made, in particular, of an elastomer lip, on the one hand, the residues that were certainly loosened from the conveyor belt in step a) but were not removed are scraped off, and on the other hand, the fluid already scraped from the conveyor belt before removal occurs in step b). In this way, the drying of the conveyor belt is further improved and the risk of corrosion is further reduced. The thin mechanical scraper may comprise, in particular, one or more scraper lips.

[0025] According to an advantageous embodiment, the operating pressure is determined based on at least one of the following parameters: i) the type of material extracted in mining, ii) environmental conditions, in particular, air temperature and / or humidity; iii) the thickness of the residues is defined on the surface; and iv) the speed of movement of the conveyor belt.

[0026] The type of material extracted in mining refers specifically to whether it is ore, coal, tailings, or similar. In this case, the type of material or raw material influences the accumulations on the conveyor belt. Environmental conditions refer, in particular, to the temperature and (relative) humidity of the air, which influence the adhesion behavior on the surface.

[0027] One or more of the parameters indicated i), ii), iii) and iv) are preferably used for the determination of Petition 870240025820, dated 03 / 25 / 2024, page 27 / 74 9 / 18 operating pressure, in order to be able to adjust an operating pressure that makes it possible to safely remove residues in step a).

[0028] According to an advantageous embodiment, the fluid jets are guided as flat cones over the surface, and the fluid jets are run in such a way that adjacent fluid jets do not overlap on the surface. Preferably, in this case, the fluid jets are run in such a way that nevertheless a full width of the conveyor belt is reached by the fluid jets.

[0029] In the context of this document, a flat cone is understood to be a fluid jet, resembling a cone, that is compressed in one direction of the cross-section. Consequently, a flat cone in cross-section does not have a round shape, but rather an oval shape or the shape of a racetrack (straight sides, which are connected to each other by curved areas). Such fluid jets in the shape of a flat cone can be generated, in particular, by flat jet nozzles. By means of the way the fluid jets are made as a flat cone, the number of fluid jets required to cover a full width of the conveyor belt can be significantly reduced. At the same time, by using corresponding nozzles, a reliable definition of the fluid jet can be obtained. Due to the prevention of overlapping of the fluid jets on the surface, particularly effective cleaning is achieved.The overlapping areas would lead to vector addition impulses on the surface in those areas, which could lead to a reduction in cleaning efficiency. Petition 870240025820, dated 03 / 25 / 2024, p. 28 / 74 10 / 18

[0030] According to an advantageous embodiment, materials extracted in mining comprise at least one of the following raw materials: a) ores; b) salts; c) lignite; d) hard coal; e) anthracite; f) bauxite; g) industrial minerals; and h) waste.

[0031] According to another aspect, a device is suggested for cleaning the surface of a conveyor belt, which moves in one direction, of residues of raw materials extracted in mining, in particular, according to a method according to the invention comprising: a nozzle bar with a multitude of nozzles for applying jets of fluid onto the surface of the conveyor belt; at least one fluid removal element for removing at least part of the fluid from the surface, a high-pressure fluid supply for preparing a fluid for the nozzle bar with a pressure of at least 30 bar, characterized by the fact that the nozzles are designed and aligned in such a way that the fluid jets strike the surface in the opposite direction of movement at an angle of incidence of less than 90°.

[0032] According to an advantageous form of execution, the Petition 870240025820, dated 03 / 25 / 2024, page 29 / 74 11 / 18 nozzles have an opening angle of 20° to 60°.

[0033] Among these should be understood nozzles, which generate a cone of fluid with an opening angle of 20° to 60°.

[0034] According to an advantageous embodiment, the nozzles are made as flat jet nozzles, and are made and arranged in such a way that adjacent fluid jets do not overlap on the surface.

[0035] A flat jet nozzle is understood, in particular, as a nozzle that, during operation, generates a flat jet cone. Flat jet nozzles can be used advantageously because the jet cone generated exhibits a uniform liquid and pressure distribution.

[0036] According to an advantageous embodiment, the nozzles are designed and arranged in such a way that the entire width of the conveyor belt can be admitted with fluid through the fluid jets that can be generated by them.

[0037] According to an advantageous embodiment, the fluid removal element comprises a grip roller.

[0038] The details and advantages disclosed for the method according to the invention can be transferred and applied to the device according to the invention and vice versa.

[0039] The invention, as well as the technical environment, will be explained in more detail below with the aid of the figures. It should be noted that the invention should not be restricted to the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures, and combine them with other components and recognitions from the present description and / or the figures. In Petition 870240025820, dated 03 / 25 / 2024, page 30 / 74 12 / 18 In particular, it should be noted that the figures, and in particular the size relationships shown, are only schematic. Equal reference numbers designate identical objects, so that clarifications from other figures may be used in a complementary way. They are shown schematically: In Fig. 1, a view of a device for cleaning a conveyor belt surface; In Fig. 2, a nozzle bar of the device according to Fig. 1 in a first view, and in Fig. 3, the nozzle bar of Fig. 2 in a second view; In Fig. 4, a spray image of a nozzle; In Fig. 5, a nozzle of a nozzle bar according to Fig. 2 or 3; In Fig. 6, a perspective view of a device for cleaning a conveyor belt surface; In Fig. 7, a longitudinal section of a conveyor belt with an adhesion roller; In Fig. 8, a longitudinal section of a conveyor belt with various angles of incidence of the fluid jets; and in Fig. 9, a longitudinal section of another example of a device for cleaning a conveyor belt surface.

[0040] Identical elements are provided with identical reference numbers.Figure 1 shows a cutaway view of a device 1 for cleaning a conveyor belt 2. The device 1 comprises a nozzle bar 3 with a... Petition 870240025820, dated 03 / 25 / 2024, p. 31 / 74 13 / 18 an infinite number of nozzles 4 for applying fluid jets 5 onto a surface 6 of the conveyor belt 2, which moves in the direction of movement 16. In the case of the surface, it is a support surface of the conveyor belt 2, which is used for transporting raw materials and tailings extracted from mining not shown here. The conveyor belt 2 is endless and, among other things, is guided by two diversion devices 7, so that the surface 6 in the upper area is on top and in the lower area is below. Therefore, the surface 6 is always off.

[0041] The nozzles 4 are flat jet nozzles and are designed in such a way that the fluid jet 5 is admitted with an angle of incidence 8 of less than 90° and, in particular, from 20° to 60° against the direction of movement 16 on the surface 6. In this case, the angle of incidence 8 is defined as the angle between the fluid jet 5 or an axis of the fluid jet cone 5 and a tangent 9 at the point of incidence 10 of the fluid jet 5 or the axis of the fluid jet cone 5. During operation, the nozzle bar 3 is supplied with fluid, in particular water, at a pressure of at least 30 bar, which then leaves the nozzle bar 3 through the nozzles 4 and forms the fluid jets 5, which exit the nozzle 4 at high pressure and then impinge on the surface 6.

[0042] By means of the angle of incidence 8 plane on the curved area of ​​the conveyor belt 2, efficient cleaning of the conveyor belt 2 of raw material residues and / or tailings extracted in mining is obtained. It should be expressly noted that one way of carrying out the Petition 870240025820, dated 03 / 25 / 2024, page 32 / 74 14 / 18 device 1 is also possible, in which the fluid jets 5 impinge on a straight section of the conveyor belt 2.

[0043] Fig. 2 shows a first view of a nozzle bar 3 with an infinity of nozzles 4. For clarity, these nozzles are only partially provided with reference numbers. Each nozzle 4 is designed so that it emits a fluid jet 5 onto the surface 6. Each fluid jet 5 has an identical opening angle 22. The nozzle bar 3 in this case is designed in the transverse direction of the conveyor belt 2 and parallel to it.

[0044] Fig. 3 shows a top view as a second view of the nozzle bar 3, Fig. 4 shows a nozzle 4 in detail.In this case, the nozzles 4 are aligned in such a way that the flat cone 14 of the fluid jets 5 are twisted around a certain angle of twist 12 against a longitudinal axis 13 of the nozzle bar 3, such that a longitudinal axis of the flat cone 15 forms the angle of twist 12 with the longitudinal axis 13 of the nozzle bar 3. This goes along with a selection of the distances between adjacent nozzles 4 as a function of the opening angle 11, the angle of twist 12 and the distance between the nozzle bar 3 and the conveyor belt 2 for the purpose that the fluid jets run as a flat cone 14 do not overlap each other. Thus, a defined impulse can be transmitted locally to the surface 6. If the fluid jets 5 overlap, then a vector exchange effect of these fluid jets 5 occurs, which reduces the cleaning effect.However, through the offset arrangement of the nozzles 4, the entire width of the conveyor belt 2 is covered by the fluid jets 5. Petition 870240025820, dated 03 / 25 / 2024, p. 33 / 74 15 / 18

[0045] Fig. 5 shows a cross-sectional detail of the nozzle bar 3. The nozzle 4 is screwed onto a thread in the nozzle bar 3.

[0046] Fig. 6 shows, in a perspective view, an example of a device 1 for cleaning a conveyor belt 2, which moves in a direction of motion 16 with a speed of up to 7.5 m / s [meters per second]. At the entrance of the device 1, the conveyor belt 2 is guided through a first guide roller 17. The device 1 runs in the lower area of ​​the conveyor belt, such that here the surface 6 and thus the support surface is underneath. The conveyor belt 2 is then guided through the nozzle bar 3 with an infinity of nozzles 4 (which for clarity are not all provided with reference numbers). The nozzles 4 are aligned against the direction of movement 16 of the conveyor belt 2. By means of the corresponding fluid jets (not shown here) as described, the surface 6 of the conveyor belt 2 is cleaned of residues of raw materials extracted in mining. Downstream in the direction of movement 16 of the nozzle bar 3 are formed two thin scrapers 18 with scraper lips 19, which eventually scrape off any remaining raw material residues from the conveyor belt 2. At the same time, adhering fluid is also scraped off the surface 6. The scraper lips 19 are preferably made of an elastomer, preferably polyurethane. The conveyor belt 2 is guided downstream of the thin scraper 18 before leaving the device 1 through a second guide roller 20, which however has no contact with the Petition 870240025820, dated 03 / 25 / 2024, page 34 / 74 16 / 18 wet surface 6 of conveyor belt 2. An adhesion roller 21 is in contact with surface 6, which adhesively removes the remaining moisture from surface 6. Therefore, the adhesion roller 21 acts as a moisture removal element 24. Preferably, the adhesion roller 21 is made of steel and preferably has an elastomer coating on the circumferential side.

[0047] Device 1 has a housing 22, which in this example is made of stainless steel. This housing receives the fluid that drips from the surface 6 of the conveyor belt 2, or is removed through the lips of the scraper 19 or the grip roller 21. This fluid flows through a drain tube 29. Additionally, washing tubes 23 are provided, through which another fluid can be introduced into the housing 22 in order to wash away any remaining raw material residues in the housing 22. Furthermore, device 1 comprises a high-pressure fluid supply 25, which supplies the nozzle bar 3 with fluid at a pressure of at least 30 bar up to 150 bar. This operating pressure, in this case, can be adjusted.

[0048] Fig. 7 schematically shows the operating principle of an adhesion roller 21 for removing moisture from a conveyor belt 2. The adhesion roller 21 rotates corresponding to the speed of movement of the conveyor belt 2, and in this case, it rolls over the conveyor belt 2 and binds the moisture adhesively to the surface 6 of the conveyor belt 2. In this case, the drying efficiency can be further increased by the fact that the adhesion roller 21 is running and is Petition 870240025820, dated 03 / 25 / 2024, page 35 / 74 17 / 18 compressed on conveyor belt 2, such that it elastically deforms conveyor belt 2 in a walking area 26. After leaving the walking area 26, the moisture is adhesively bound to the surface 6 of the grip roller 21. In the course of rotation of the grip roller 21, the moisture is removed again from the grip roller 21 by virtue of the existing centrifugal forces.

[0049] Figure 8 schematically shows possible angles of incidence on conveyor belt 2. In this case, the device 1, not shown completely, is operated in such a way that the fluid jets 5 strike the conveyor belt 2 in a straight area. The tangent at the point of incidence passes, for example, over the surface of the conveyor belt 2. Fig. 8 shows, as an example, the angle of incidence 8 of 20°, 45° and 60°. A distance 28 between the nozzle bar 3 and the surface 6 of the conveyor belt 2, in this case, remains constant. The various angles of incidence 8 are achieved by varying the position of the nozzle bar 3.

[0050] Fig. 9 schematically shows one embodiment of device 1 in which the fluid jets 5 impinge on the straight area of ​​the conveyor belt 2. It refers to the embodiments shown above. List of reference numbers for a device for cleaning a conveyor belt: conveyor belt, nozzle bar, fluid jet nozzle. Petition 870240025820, dated 03 / 25 / 2024, page 36 / 74 18 / 18 surface deflection device angle of incidence tangent point of incidence opening angle angle of torsion longitudinal axis cone plane longitudinal axis of the cone plane direction of movement first guide roller thin scraper scraper lip guide roller grip roller housing washing tube moisture removal element high-pressure fluid supply walking area distance drain pipe Petition 870240025820, dated 03 / 25 / 2024, page 37 / 74

Claims

1 / 3 CLAIMS 1. Device (1) for cleaning a surface (6) of a conveyor belt (2) moving in a direction of movement (16), of residues of materials extracted in mining, raw materials and / or tailings extracted in mining, comprising: a nozzle bar (3) with nozzles (4) for applying jets of fluid (5) onto the surface (6) of the conveyor belt (2);at least one fluid removal element (24) for removing at least part of the fluid from the surface (6), wherein the nozzles are run and aligned, such that the fluid jets (5) impinge in the opposite direction of movement (16) at an angle of incidence (8) of less than 90° on the surface (6), wherein the device further comprises a fine mechanical scraper (18) through which the conveyor belt (2) can be guided, wherein the fine scraper (18) runs between the nozzle bar (3) and the fluid removal element (24), characterized in that the fluid removal element (24) comprises an adhesion roller (21), which has circumferentially an elastomer coating, and wherein the device (1) comprises a high-pressure fluid supply (25) for preparing a fluid for the nozzle bar (3) with a pressure of at least 30 bar.; 2. Device according to claim 1, Petition 870260043423, dated 08 / 05 / 2026, p. 8 / 13 2 / 3 characterized by the nozzles having an opening angle (11) of 20° to 60°.

3. Device (1) according to any of the preceding claims, characterized in that the nozzles (4) are made as flat jet nozzles, and these nozzles are made and arranged in such a way that the adjacent fluid jets (5) do not overlap on the surface (6).

4. Device (1) according to any of the preceding claims, characterized in that the nozzles (4) are made and arranged in such a way that a full width of the conveyor belt (2) can be exposed to the fluid by the fluid jets (5) that can be generated by them.

5. Method for cleaning a surface (6) of a conveyor belt (2), moving in a direction of movement (16), of mining material residues with a device (1), as defined in any of the preceding claims, the method being characterized by comprising the following steps: a) applying jets of fluid (5) to the surface (6) at an operating pressure of at least 30 bar and at a definable angle of incidence (8) less than 90° in the opposite direction to the direction of movement (16), in order to remove residues; b) removing at least part of the fluid from the surface (6), wherein, after step a) and before step b) the surface (6) of the conveyor belt (2) is guided through a fine mechanical scraper (18).

6. Method according to claim 5, characterized by the extracted mining materials comprising raw materials and / or tailings extracted in mining.

7. Method according to claim 5 or 6, characterized in that an angle of incidence (8) is defined between 20° and 60°.

8. Method according to one of claims 5 to 7, characterized in that the fluid jets (5) have an opening angle (11) of 20° to 60°.

9. Method according to one of claims 5 to 8, characterized in that the operating pressure is determined as a function of at least one of the following parameters: i) the type of material transported in mining, ii) environmental conditions, such as temperature and / or air humidity; iii) a thickness of the waste defined on the surface (6); and iv) a speed of movement of the conveyor belt.

10. Method according to one of claims 5 to 9, characterized in that the fluid jets (5) are guided as flat cones (14) on the surface, and the fluid jets (5) are run in such a way that adjacent fluid jets (5) do not overlap on the surface (6).

11. Method according to one of claims 5 to 10, characterized in that the fluid jets (5) are executed in such a way that fluid is applied to a full width of the conveyor belt (2). Petition 870260043423, dated 08 / 05 / 2026, p. 10 / 13

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