WO2008151814A1

WO2008151814A1 - Device and method for cleaning a rotating belt element

Info

Publication number: WO2008151814A1
Application number: PCT/EP2008/004758
Authority: WO
Inventors: Mathieu Josef Maria Robberts
Original assignee: Robo Paper B.V.
Priority date: 2007-06-15
Filing date: 2008-06-13
Publication date: 2008-12-18
Also published as: DE112008001869A5; DE102007028341A1

Abstract

In order to permanently assure a high cleaning efficiency and high cleaning quality of cleaning devices for cleaning a circulating belt element, particularly in the paper industry, the invention proposes a device (1) for cleaning a circulating belt element, particularly in the paper industry, such as, for example, a drying screen (6), said device having a brush roller (18) disposed transversely to a circulation direction of the belt element between a first edge (9A) of the rotating belt element and a second edge (10A) of the rotating belt element opposite the rotating belt element. The cleaning device is characterized by lifting devices (22, 23), arranged in edge regions of the rotating belt element for lifting the brush roller.

Description

Device and method for cleaning a revolving web element

[01] The invention relates on the one hand to a device for cleaning a circulating web element, in particular in the paper industry, such as a drying wire, with a brush roller, which faces transversely to a direction of circulation of the web element between a first edge of the revolving web element and a second edge of the revolving web element the circulating track element is arranged traversing. On the other hand, the invention relates to a method for cleaning a circulating web element, in particular in the paper industry, such as a drying wire, in which the circulating web element is cleaned by means of a rotating brush roller.

[02] Generic devices and methods for cleaning circulating webs are widely known in the art. Thus, for example, the German translation DE 697 09 984 T2 describes a dust removal system, which is mainly used in the film industry or paper industry, and with which adhering dust can be removed from a circulating path. Even sticky dirt, such as feathery fibers, can be removed from a circulating web by this system.

Especially in the paper industry, there is a need to thoroughly clean circulating webs, such as a circulating dryer, during papermaking or in purging of soils, so that a high quality standard in production is always ensured. For cleaning surfaces in this circulating path, a generic dust removal system comprises a rotating brush roller which is rotated by a suitable drive is, so that the brush roller rotates counter to a transport direction of the revolving web. The brush roller rotates in this case within an air suction chamber, so that contaminants dissolved from the surface are sucked directly from the actual cleaning area. As a result, the risk is reduced that solved by means of the brush roller soiling uncontrolled get into the environment.

[04] The rotating brush roller itself is cleaned of dirt adhering to it by grinding with its bristles on an air nozzle. As a result of this mechanical contact, dirt particles adhering to the bristles are well loosened and sucked off directly from the rotating brush roller due to the suction effect of the air nozzle. This ensures that the rotating brush roller can permanently rid the dirt particles of the surfaces to be cleaned of it.

[05] The disadvantage here, however, is that the brush roller is subject to additional wear due to the direct sliding contact with the air nozzle. In particular, with softer bristles for cleaning rather sensitive surfaces, this inevitably leads to rapid wear of the rotating brush roller, which on the one hand quickly decreases the cleaning quality and on the other hand, frequent replacement intervals of a brush roller by itself.

[06] It is an object of the present invention to provide generic cleaning devices and cleaning methods, which are used in particular in the paper industry for further development, so that a revolving web element is cleaned with a permanently constant cleaning performance and quality of cleaning.

The object of the invention is achieved on the one hand by a device for cleaning a circulating web element, in particular in the paper industry, such as a dryer, with a brush roller, which transverse to a circumferential direction of the circulating web element between a first edge of the circulating web element and a second Edge of the circulating track element with respect to the running track element is arranged traversing, and which is characterized by lifting devices which are arranged in edge regions of the revolving web element for lifting the brush roller.

[08] By means of the lifting devices it is advantageously possible to at least raise the brush roller in the edge regions of the circulating track element as soon as it passes over the edges of the circulating track element in an outer edge region, so that the risk is reduced that the brush roller at a provided there Füh - Guides or guide roller grinds and thereby subject to increased wear.

[09] The term "circulating track element" encompasses all circulating tracks which are suitable for endlessly circulating by means of a guide or deflection roller and being cleaned by means of a brush roller. The circulating track element is preferably in accordance with an endless loop always in the direction of rotation on leadership and

Deflection pulleys moved. In particular, this is the circulating

Web element around a drying wire, which must be cleaned of dirt particles that accumulates in the context of a papermaking and even in the

Stored dryer fabric.

[10] In the present case, the term "edge" is understood to mean the longitudinal side boundaries to the left and right of the web element in the direction of rotation.

[11] The term "edge area" describes a region belonging to the circulating web element at the edges of the circulating web element.

[12] The term "outer edge area" is used in this context for an area that is located directly next to the circulating path element, that is not part of the circulating path element. [13] In this connection, the object of the invention is also achieved by a method for cleaning a circulating web element, in particular in the paper industry, such as a drying wire, in which the circulating web element is cleaned by means of a rotating brush roller, wherein the rotating brush roller Traversed transversely to a direction of rotation of the web element between a first edge of the web element and a second edge of the web element, and the cleaning process is characterized in that the brush roller is raised in edge regions relative to the revolving web element.

By such a lifting of the brush roller, the risk is reduced that the brush roller passes when crossing the edges on the revolving web element addition to there positioned components and as a result is subject to higher wear.

Therefore, it is advantageous if the brush roller is positioned in outer edge regions radially farther away from the circulating path element than in regions of the path element which are arranged between the edges.

[16] If the brush roll is raised radially and / or lifted radially away from the circulating web member before the brush roll is moved over the lateral edges of the web member, the risk of the brush roll being reduced in outer edge regions such as with guide or deflection rollers is reduced , over which the circulating track element runs, comes into contact.

A structurally particularly simple embodiment provides that the lifting devices are arranged laterally of the revolving path element. This ensures a particularly good and quick accessibility to the lifting devices. This is advantageous, for example, should it be necessary to make adjustments, maintenance and / or repair work on the holding devices. [18] In order that the brush roller in the outer edge regions can be lifted off to the left and right of the circulating track element with respect to the circulating track element, it is advantageous if at least two lifting devices are provided on the cleaning device.

[19] It should be understood that the elevators should be located in a traverse area in which the brush roller traverses so as to ensure that the brush roller can successfully interact with the elevators.

[20] Since the cleaning area or the traversing area of the brush roller advantageously lies at the level of a guiding and / or deflection roller of the circulating path element in order to reliably ensure a counterpressure against the brush roller, it is advantageous if the lifting devices are opposite a guide - And / or pulley are arranged.

[21] In this context, it is advantageous if the lifting devices are arranged opposite a lateral surface of a guide and / or deflection roller. Thus, it is reliably prevented that the brush roller unintentionally comes into contact with the lateral surface and thereby wears faster.

[22] It is advantageous if the lifting devices are arranged on a transport frame and / or on a holder for guide and / or deflection rollers of the revolving web element. As a result, the lifting devices can be reliably integrated even in existing cleaning devices.

[23] It is understood that the lifting devices can be configured in many ways. However, a preferred embodiment provides that the lifting devices have ramps. Such ramps may advantageously cooperate with a brush roll holder or a cleaning head of the device. [24] In this connection, it is advantageous if the brush roller is arranged on a brush roller holder. As a result, the brush roller is at least raised together with the brush roller holder by means of the lifting device.

[25] Alternatively, it is advantageous if the brush roller is arranged on a cleaning head with a vacuum chamber.

[26] In any case, it is advantageous if the brush roller is pivotally mounted on a horizontal axis, which runs transversely to the direction of rotation of the web element. This ensures that the brush roller can be raised relative to the revolving web element, in particular when a brush roller holder or a cleaning head runs onto a provided ramp of a lifting device and is thereby moved radially away from the revolving web element.

Accordingly, a preferred variant of the method provides that the brush roller rotates on a brush roller holder about an axis of rotation which is held substantially transversely to the direction of rotation of the circulating web element, and the brush roller holder in edge regions of the revolving web element on a curve touches and moves along the curve is raised, whereby the brush roller holder is raised with the brush roller radially to the revolving web element and / or lifted radially from the revolving web element.

[28] The curve required for this purpose can be provided in a particularly simple manner by means of the aforementioned ramp.

Furthermore, it is advantageous if the brush roller holder and / or the cleaning head is pivoted about a horizontal bearing axis when the brush roller holder and / or the cleaning head with the brush roller is raised radially to the revolving web element and / or lifted radially from the revolving web element , It is understood that the brush roller can also be lifted by other mechanisms of the circulating track element, in particular in the edge regions of the revolving path element or the outer edge regions. In particular, for this purpose, pneumatically, hydraulically and / or electrically actuatable drives could be provided on a brush roller holder or a cleaning head having the brush roller. However, this would significantly increase the traversing mass to be moved, so that with respect to the drives and bearings to be used, a much higher construction effort would have to be operated in order to achieve comparable cleaning results with the present invention.

[31] In addition, the object of the invention is also independent of the other features of the present invention of a device for cleaning a revolving web element, in particular in the paper industry, such as a drying wire, solved with a brush roller, which in particular transversely to a direction of rotation of the web element between a first edge of the web element and a second edge of the web element with respect to the revolving web element is arranged traversing, wherein the cleaning device is characterized by means for Nasssäu- bern the brush roller.

[32] Advantageously, the rotating brush roll is achieved, for example, not only by means of compressed air and / or by means of stripping, for example on an air nozzle, but the rotating brush roll is cleaned cumulatively or alternatively wet.

This advantageously reduces the wear of the rotating brush roller considerably, since the bristles of the brush roller no longer wear over corresponding wipers. It also succeeds with the present Nasssäuberung even stubbornly dissolve stuck to bristles dirt particles and thereby particularly safe to solve by the brush roller. [34] In the long term, a particularly good cleaning is achieved by arranging a spray nozzle on the cleaning head. Such a spray nozzle makes it possible to apply a special cleaning liquid to an unpurified circulating web element or a polymer emulsion on a cleaned circulating web element.

[35] In order to achieve a finely atomized application of a polymer emulsion, it is proposed that the spray nozzle be in communication with a liquid container and a compressed air supply.

[36] The spraying device is preferably arranged on the cleaning head such that only cleaned web elements are sprayed with a polymer emulsion. The web element is thus first cleaned with the cleaning head and then sprayed with a polymer emulsion.

The object of the invention is also achieved by a method for cleaning a circulating web element, in particular in the paper industry, such as a dryer, in which the circulating web element is cleaned by means of a rotating brush roller and the cleaning process is characterized in that the rotating Brush roller is wet cleaned.

[38] In order to prevent the circulatory web element to be cleaned from being itself wetted, it is advantageous if the brush roll is wet-cleaned during a cleaning pause or during a standstill of a web element cleaning device.

It is understood that such a Nasssäuberung can be made diverse. For example, the rotating brush roll could be immersed in a suitable liquid bath. Structurally particularly simple, however, the present wet cleaning is ensured when the brush roller is cleaned by means of liquid jets. [40] For this purpose, a preferred embodiment provides that the means for wet cleaning comprise liquid jet nozzles.

[41] In order for the liquid jets emerging from the liquid jet nozzles to be able to clean the brush roll directly and without loss of power, it is advantageous if the liquid jet nozzles are aligned with their nozzle openings on the rotating brush roll.

[42] A related process variant provides that the liquid jets emerge from suitable liquid jet nozzles which are directed onto the brush roll.

[43] Advantageously, the brush roller is driven during the wet cleaning by means of the liquid jets. Due to the fact that the liquid jets impinging on the brush roller drive, ie rotate, the brush roller, it is possible in a structurally particularly simple manner to handle virtually every single bristle of the brush roller with a liquid jet and to thereby reliably clean it of adhering dirt particles.

[44] It is also advantageous if by means of the liquid jets of the brush roller loosened contaminants are additionally thrown away by means of the brush roller rotation of the bristles of the brush roller.

[45] In order to ensure that the dissolved contaminants are carried away from the brush roller, it is advantageous if the dissolved contaminants and liquids are sucked off.

In order that dissolved dirt and a liquid no longer needed can be quickly guided away from the brush roller, it is advantageous for the brush roller to rotate in a vacuum chamber of a cleaning head. Structurally particularly simple, the liquid jet nozzles with respect to the brush roller can be arranged, because the liquid jet nozzles are arranged on a brush roller holder and / or a cleaning head with a vacuum chamber.

Since such a wet cleaning of a brush roller already advantageously improves known cleaning devices with brush rollers, all features in connection with the wet cleaning explained here are also advantageous without the other features of the invention.

[49] Furthermore, the object of the invention is achieved by a device for cleaning a circulating web element, in particular in the paper industry, such as a dryer, with a cleaning head, which is arranged traversing the revolving web element, wherein the cleaning head an input area and a curved Having output range, and are arranged in the curved output area and / or behind means for additionally accelerating an already established in the cleaning head main volume flow.

[50] Alternatively or cumulatively, it is advantageous if means for increasing a suction force are arranged in the curved exit area and / or behind it.

By providing means for additionally accelerating a main volume flow already established in the cleaning head and / or means for increasing a suction force in the curved outlet area and / or behind, in particular power losses resulting from the fact that the main volume flow is curved are reduced Output range is deflected. Advantageously, by means of such additional accelerating means and / or increasing means, not only a power loss can be reduced but, moreover, even an increase in suction power can be achieved. [52] In this context, the object is also achieved by a method for cleaning a circulating web element, in particular in the paper industry, such as a drying wire, in which dissolved by the circulated track element dirt particles directed by means of a cleaning head substantially radially to the circulating track element Main vacuum flow are sucked, and the process is characterized in that the substantially radially directed main volume flow is deflected in the cleaning head, wherein the main volume flow is further accelerated in the region of its deflection.

Advantageously, in the region of the deflected main volume flow and / or behind additional secondary flow rates are introduced into the cleaning head, with which an additional acceleration of the main volume flow is achieved.

[54] A process variant for this purpose provides that compressed air is injected in the region of the deflected main flow and / or behind it. Compressed air can be made available without much effort by means of a process air already present on a cleaning device.

[55] A corresponding device variant therefore provides that the means for additional acceleration and / or the means for increasing the suction force comprise compressed air nozzles.

[56] Alternatively or cumulatively, it is advantageous if liquid, in particular water, is injected in the region of the deflected main volume flow and / or behind it. A liquid can additionally accelerate a main volume flow.

[57] Alternatively or cumulatively, it is advantageous if the means for additional acceleration and / or the means for increasing the suction force comprise jet nozzles. [58] A particularly preferred embodiment provides that the curved exit area has a wall which has a first wall area with a small radius, an inner radius, and a second wall area with a larger radius, an outer radius, wherein in the second wall area accelerating nozzles, in particular the compressed air nozzles and / or the liquid nozzles, are arranged.

[59] Moreover, it is advantageous if one or more brush rollers are arranged in or on the cleaning head. As a result, the brush rollers are in the suction region of the cleaning head.

[60] If a brush roller rotates in the region of the main volume flow directed substantially radially relative to the circulating path element, contaminations can thus be additionally reliably extracted by the brush roller.

[61] Structurally simple, the cleaning device and the cleaning process designed when the brush roller is driven by the circulating track element. Advantageously, dispensed with a separate brush roller drive in such an embodiment.

[62] Since with the means for additional acceleration or with the means for increasing a suction force a cleaning performance compared to conventional cleaning methods are permanently increased and / or a conventional cleaning quality compared to conventional cleaning methods can be permanently improved, in this respect mentioned features are also without the rest Features of the invention advantageous.

[63] The cleaning process becomes particularly effective when cleaning

Protective liquid is applied. The protective liquid may be a polymer emulsion, a silicone fluid or a similar agent applied flatly to the web. is used to reduce pollution and / or facilitate cleaning. It is particularly advantageous if the protective liquid emulsion is sprayed on with compressed air. In this case, the compressed air required for the cleaning can be used on the cleaning head, while another line leads from the application nozzle to a polymer emulsion container. Between nozzle and polymer emulsion container is a metering pump, which ensures uniform spraying of the material web.

[64] Experiments have shown that it is advantageous to apply 0.01 to 0.1 ml of polymer emulsion per square meter of web element.

[65] In order that the applied polymer emulsion is not immediately removed during cleaning, it is advantageous if the polymer emulsion is applied in the web direction after cleaning.

[66] All claims to the spray nozzle and for applying a polymer emulsion with this spray nozzle are also relevant to the invention independently of the other claims and in particular of the lifting device.

[67] Further advantages, objects and features of the present invention will be explained with reference to the following description of the appended drawing, in which an apparatus for cleaning a circulating dryer fabric in the paper industry is shown by way of example.

[68] It shows

FIG. 1 shows schematically a view of a traversing device having a cleaning head of a cleaning device for a circulating drying wire,

FIG. 2 is a schematic view of a further view of the cleaning head with a brush roller resting on the circulating drying wire; FIG. 3 is a schematic view of the cleaning head driven onto a ramp;

FIG. 4 schematically shows a first detailed view of the cleaning head with well-recognizable means for wet cleaning and means for additionally accelerating a deflected main volume flow in a curved exit area,

FIG. 5 schematically shows a further detail view of the cleaning head,

FIG. 6 shows a schematic three-dimensional view of an arrangement of dry sieve web, cleaning head, traverse bar and detergent container,

FIG. 7 shows a schematic view of a cleaning head with an emulsion application nozzle mounted in front of it and FIG

8 shows a view of the cleaning head with emulsion application nozzle and screen web.

[69] The cleaning device 1 shown in FIG. 1 comprises a traversing device 2 with a traverse bar 3 and a disposal device 4, which are arranged transversely to a direction of rotation 5 of a drying sieve 6 via this drying sieve 6.

[70] At the traversing device 2 a cleaning head 7 oscillates according to the double arrow 8 between a first edge 9 and a second edge 10 of the Trockensie- bes 6. Right next to the dryer 6 is a cleaning booth 11, in which the cleaning head 7 is moved, if this is to be cleaned.

[71] The cleaning head 7 is placed above a deflection roller 12, by means of which the drying wire 6 is deflected below the traversing device 2. The cleaning head 7 itself consists essentially of a straight cylindrically shaped entrance area 13, to which a 90 ° curved exit area 14 adjoins. This output region 14 is connected to the disposal device 4 via a discharge pipe 15.

[73] Externally at the entrance area 13 of the cleaning head 7, a weight holder 16 is attached to which a displaceable weight 17 (see FIG. 5) is fastened, by means of which the contact force of a brush roller 18 rotatably mounted on the cleaning head 7 can be adjusted relative to the drying wire 6 is.

The brush roller 18 does not have its own drive motor, but is driven during the cleaning of the circulating dryer 6 only by the movement of the dryer 6 in the direction of rotation 5, whereby the brush roller 18 rolls only on the drying wire 6. In this case, the brush roller 18 rotates about a brush roller rotation axis 19, which is also aligned substantially transversely to the direction of rotation 5.

[75] Depending on how the brush roller 18 is to act on the drying wire 6, in addition to the contact pressure and an angle of the brush roller 18 can be adjusted according to the respective requirements. For this purpose, the brush roller rotation axis 19 is not held at right angles to the direction of rotation 5, but can be adjusted to an angle of 10 °, without thereby achieving critical wear values in the brush roller 18 or in the drying wire 6.

A considerable reduction in wear of the brush roller 18 is also achieved in that the entire cleaning head 7 in outer edge regions 9 A and 10 A, which are adjacent to the dryer fabric 6, is moved radially away from the dryer fabric 6, so that between the dryer fabric 6 and the Brush roller 18, a distance 20 (see Figure 3) can be adjusted. This prevents the brush roller 18 over a lateral surface 21 of the guide roller 12 grinds and this is subject to undesirable wear.

Therefore, the brush roller 18 is lifted radially in particular in the outer edge regions 9A and 10A to the rotating drying wire 6 and often even lifted off the rotating dryer 6 before the brush roller 18 is moved over the edge 9 and over the edge 10.

Structurally particularly simple, this lifting or lifting takes place in this exemplary embodiment, in each case a lifting device 22 or 23 being provided in the region of the edges 9 and 10 or in the outer edge regions 9A and 10A. The lifting devices 22 and 23 each have a ramp 24 and 25, which are adjustable in height with respect to the drying wire 6. The ramps 24 and 25 each form a curve 26 and 27, respectively, on which the cleaning head 7 runs as soon as it approaches the edges 9 or 10.

[79] If the cleaning head 7 is guided further along one of the curves 26 and 27, then it and thus also the brush roller 18 can already lift off from the drying wire 6, so that the brush roller 18 is not only free of contact with the drying wire 6 but also free from a contact with the lateral surface 21 of the guide roller 12. This prevents, as already mentioned above, that the brush roller 18 comes into contact with the lateral surface 21 of the deflection roller 12 and, as a result, wears out unnecessarily quickly.

An operation of such lifting or lifting is illustrated in more detail in FIGS. 2 and 3, wherein the cleaning head 7 moves in a direction of movement 28 towards the second edge area 10 and in this case inevitably onto the second ramp 25 of the second holding device 23 accumulates and moves along the second curve 27 and in this case by the distance 20 from the dryer fabric 6 and also from the lateral surface 21 is lifted. In order to ensure such lifting, the cleaning head 7 is pivotably mounted on the traverse device 2 about a corresponding horizontal bearing axis 29.

[81] The holding devices 22 and 23 can be advantageously provided on the cleaning device 1 if they are integrated and fastened to a transport frame of the dryer fabric 6 or, as explained in this exemplary embodiment, on a deflection roll holder 30.

By means of the lifting devices 22 and 23, a constant cleaning performance and cleaning quality of the present cleaning device 1 is permanently ensured since premature wear of the brush roller 18 is further reduced by means of the lifting devices 22 and 23.

[83] To further ensure a constant cleaning performance and quality of cleaning, means 31 (see FIG. 4) for wet cleaning of the brush roller 18 are additionally provided on the cleaning head 7. The means 31 for wet cleaning comprise in this embodiment four high-pressure water nozzles 32 (numbered here only by way of example), which are integrated in the cleaning head 7. By means of the emerging from the high pressure water jets 32 water jets 33 (only explicitly numbered here), the brush roller 18, if necessary, additionally shock-cleaned, whereby persistently adhering to the brush roller 18 adhering dirt particles are much better solved by means of a pure Trockenabsaugung.

[84] Advantageously, the brush roller 18 rotating about the brush roller rotation axis 19 is rotated by the water jets 33, so that the dirt particles loosening from the brush roller 18 and the water drops coming in contact with the brush roller 18 are thrown away from the brush roller 18. As a result, the brush roller 18 is optimally cleaned, so that a high quality of cleaning is always guaranteed. [85] Ideally, the cleaning head 7 is moved into the cleaning cabin 11 for such shock-cleaning, so that the environment 34 is not adversely affected by water and dirt particles spilling over it.

In addition, dirt particles and also water residues are sucked through the cleaning head 7 and blown into the disposal device 4.

Already a continuous cleaning of the brush roller 18 is achieved by means of air cleaning nozzles 35, from which air jets 36 emerge and impinge continuously on the brush roller 18.

[88] In order to additionally protect the surroundings 34 from dust particles 37 circulating around during the cleaning of the dryer fabric 6, an air curtain 39 is formed directly on a main opening 38 of the entrance area 13.

[89] In order to remove dirt particles 37 through the cleaning head 7 via the discharge pipe 15 into the disposal device 4, a main volume flow 40 is generated within the cleaning head 7, by means of which the individual dirt particles 37 are entrained. Also, residual water of the water jets 33 are detected by the main volume flow 40 and discharged from the cleaning head 7. The main volume flow 40 is also generated by Lufteindüsung in the entrance area 13 via compressed air nozzles 41 (numbered here only by way of example).

Due to the compact construction of the cleaning head 7 with its curved outlet area 14, the main volume flow 40 is decelerated by the deflection caused by the curved outlet area 14. Although the cleaning head 7 has an excellent suction power with its curved outlet region 14, this is reduced by diverting the main volume flow 40 in a deflection region 42. On the one hand to compensate for this reduction in suction power and on the other hand to achieve a suction power increase of the cleaning head 7, 14 additional acceleration nozzles 43 are provided in the deflection region 42 at the curved output region, by means of which in this embodiment, a combination of additional compressed air jets 44 and additional water jets 45 in the Cleaning head 7 are injected. The additional compressed air jets 44 and the additional water jets 45 form additional secondary volume flows which additionally accelerate the main volume flow 40 in the deflection region 42 and behind it. For this purpose, the acceleration nozzles 43 have a compressed air connection 46 and a pressurized water connection 47.

In order for the additional secondary volume flows to be advantageously injected into the deflection region, the acceleration nozzles 43 are located on an outer radius range 48 of the curved outlet region, so that the additional secondary volume flows are aligned in the direction of the deflected main volume flow. The outer radius region 48 also differs from an inner radius region 49 by a larger wall surface, which substantially facilitates the attachment of the acceleration nozzles 43.

The arrangement 50 shown in FIG. 6 consists of the drying wire 51 to be cleaned, which is guided over a deflection roller 52. In the region of the deflection roller 52, the cleaning head 53 is displaced back and forth on a traverse bar 54 transversely to the direction of travel of the drying wire 51. The running direction of the drying wire 51 is indicated by the arrow 55, while the running direction of the cleaning head is indicated by the double arrow 56.

[94] A cleaning device chamber 57 is provided on the traverse bar 54. This cleaning device chamber 57 is connected via a line 58 to a dorsing pump 59. The metering pump 59 sits on a barrel with protective liquid. As the protective liquid, a polymer emulsion was selected. [95] FIGS. 7 and 8 show how a nozzle 61 is attached to the cleaning head 53. The nozzle is mounted so that the cleaned web 51 can be sprayed with it. The web 51 is in this case treated with a finely atomized spray with 0.05 ml of liquid per m ² protection Trockensiebfläche.

For this purpose, a line 62 with protective liquid and a line 63 with compressed air to the nozzle 61 to produce there a finely atomized transverse to the direction of the web 51 aligned beam of protective liquid.

Claims

claims:

1. A device for cleaning a circulating web element, in particular in the paper industry, such as a drying wire, with a brush roller, which is arranged transversely to a circumferential direction of the web element between a first edge of the revolving web element and a second edge of the revolving web element with respect to the revolving web element , characterized by lifting devices, which are arranged in edge regions of the circulating web element for lifting the brush roller.

2. Cleaning device according to claim 1, characterized in that the lifting devices (22, 23) are arranged laterally of the circulating track element (6).

3. Cleaning device according to claim 1 or 2, characterized in that at least two lifting devices (22, 23) are provided.

4. Cleaning device according to one of claims 1 to 3, characterized in that the lifting devices (22, 23) relative to a guide roller and / or a deflection roller (12) are arranged.

5. Cleaning device according to one of claims 1 to 4, characterized in that the lifting devices (22, 23) relative to a lateral surface (21) of a guide roller and / or a deflection roller (12) are arranged.

6. Cleaning device according to one of claims 1 to 5, characterized in that the lifting devices (22, 23) arranged on a transport frame and / or on a holder (30) for guide rollers and / or deflection rollers (12) of the revolving web element (6) are.

7. Cleaning device according to one of claims 1 to 6, characterized in that the lifting devices (22, 23) ramps (24, 25).

8. Cleaning device according to one of claims 1 to 7, characterized in that the brush roller (18) is arranged on a brush roller holder.

9. Cleaning device according to one of claims 1 to 8, characterized in that the brush roller (18) on a cleaning head (7) with a vacuum chamber (7A) is arranged.

10. Cleaning device according to one of claims 1 to 9, characterized in that the brush roller (18) is pivotally mounted on a horizontal axis (29) which extends transversely to the direction of rotation (5) of the revolving path element (6).

11. Cleaning device according to one of claims 1 to 10, characterized by means (31) for wet cleaning of the brush roller (18).

12. Cleaning device according to claim 11, characterized in that the means (31) for wet cleaning comprise liquid jet nozzles (32).

13. Cleaning device according to claim 12, characterized in that the liquid jet nozzles (32) are aligned with their nozzle openings on the brush roller (18).

14. Cleaning device according to claim 12 or 13, characterized in that liquid jet nozzles (32) are arranged on a brush roller holder and / or on a cleaning head (7) with a vacuum chamber (7A).

15. Cleaning device according to one of claims 1 to 14, characterized by a cleaning head, which is arranged traversing with respect to the circulating track element, wherein the cleaning head has an input area and a curved exit area, and in the curved exit area and / or behind means for additional Speeding up an im

Cleaning head already established main volume flow are arranged.

16. Cleaning device according to claim 15, characterized in that in the curved output region (14) and / or behind means for increasing a suction force of the cleaning head (7) are arranged.

17. Cleaning device according to claim 15 or 16, characterized in that the means for additional acceleration and / or the means for increasing the suction force comprise compressed air nozzles.

18. Cleaning device according to one of claims 15 to 17, characterized in that the means for additional acceleration and / or the means for increasing the suction comprise liquid jet nozzles.

19. Cleaning device according to one of claims 15 to 18, characterized in that the curved exit region (14) has a wall having a first wall portion with a smaller radius, an inner radius (49), and a second wall portion with a larger radius Outside radius (48), wherein in the second wall region acceleration nozzles (43) are arranged.

20. Cleaning device according to one of claims 15 to 20, characterized in that in or on the cleaning head (7) one or more brush rollers (18) are arranged.

21. Cleaning device, in particular according to one of the preceding claims, characterized in that a spray nozzle is arranged on the cleaning head (7).

22. Cleaning device according to claim 21, characterized in that the spray nozzle with a liquid container and a compressed air supply in

Connection stands.

23. A method for cleaning a circulating web element, in particular in the paper industry, such as a dryer, in which the circulating web member is cleaned by means of a rotating brush roller, wherein the rotating brush roller transverse to a direction of rotation of the web member between a first edge of the web member and a second edge Traversed trajectory of the web element, characterized in that the brush roller in the outer edge regions is raised relative to the revolving web element.

24. A cleaning method according to claim 23, characterized in that the brush roller (18) in the outer edge regions (9 A, 10 A) radially further away from the circulating track element (6) is positioned as in areas of the web element (6), which between the edges (9, 10) are arranged.

25. A cleaning method according to claim 23 or 24, characterized in that the brush roller (18) is raised radially to the revolving web element (6) and / or lifted radially from the revolving web element (6) before the brush roller (18) over the side Rims (9, 10) of the web element (6) is moved.

26. A cleaning method according to claim 23 to 25, characterized in that the brush roller (18) on a brush roller holder about a rotation axis (19) rotates substantially transversely to the direction of rotation (5) of the circulating Web element (6) is held, and the brush roller holder in edge regions (9, 10) of the revolving web element (6) on a curve (26, 27) and moves along the curve (26, 27) is moved, whereby the brush roller holder with the brush roller (18) is lifted radially to the revolving web element (6) and / or lifted radially from the revolving web element (6).

27. A cleaning method according to claim 26, characterized in that the brush roller holder and / or the cleaning head (7) is pivoted about a horizontal bearing axis (29) when the brush roller holder and / or the cleaning head (7) with the brush roller (18) radially to the revolving web element (6) is raised and / or lifted off the circulating web element (6).

28. Cleaning method according to one of claims 23 to 27, characterized in that the brush roller (18) is wet cleaned.

29. Cleaning method according to one of claims 23 to 28, characterized in that the brush roller (18) is wet-cleaned during a cleaning pause or during a standstill of a web element cleaning device (1).

30. Cleaning method according to one of claims 23 to 29, characterized in that the brush roller (8) by means of liquid jets (33) is cleaned.

31. A cleaning method according to claim 30, characterized in that the liquid jets (33) emerge from suitable liquid jet nozzles (32) which are aligned with the brush roller (18).

32. Cleaning method according to one of claims 23 to 31, characterized in that the brush roller (18) during the wet cleaning by means of liquid jets (33) is driven.

33. Cleaning method according to one of claims 23 to 32, characterized in that by means of liquid jets (33) of the brush roller (18) dissolved dirt are thrown off by means of a brush roller rotation of bristles of the brush roller (18).

34. Cleaning method according to one of claims 23 to 33, characterized in that dissolved dirt and liquids are sucked off.

35. Cleaning method according to one of claims 23 to 34, characterized in that the brush roller (18) rotates in a vacuum chamber (7A) of a cleaning head (7) arranged.

36. Cleaning method according to one of claims 23 to 35, characterized in that of the circulating track element dissolved dirt particles by means of one in a substantially radially to the cleaning head rotating

Web element directed main volume flow are sucked, and the substantially radially directed main volume flow is deflected in the cleaning head, wherein the main volume flow is further accelerated in the region of its deflection.

37. Cleaning method according to claim 36, characterized in that in the deflection region (42) of the deflected main volume flow (40) and / or behind additional secondary volume flows (44, 45) are introduced into the cleaning head (7).

38. Cleaning device according to claim 36 or 37, characterized in that in the deflection region (42) of the deflected main volume flow (40) and / or behind compressed air (44) is injected.

39. Cleaning method according to one of claims 36 to 38, characterized in that in the deflection region (42) of the deflected main volume flow

(40) and / or behind liquid, in particular water (45), is injected.

40. Cleaning method according to one of claims 23 to 39, characterized in that in a substantially radially to the circulating web element (6) directed main volume flow (40) rotates a brush roller (18).

41. Cleaning method in particular according to one of claims 23 to 40, characterized in that during cleaning a protective liquid, preferably a polymer emulsion, is applied.

42. Cleaning method according to claim 41, characterized in that the protective liquid is sprayed with compressed air.

43. Cleaning method according to one of claims 41 or 42, characterized in that 0.01 to 0.1 ml of protective liquid per square meter of web element are applied.

44. Cleaning method according to one of claims 41 to 43, characterized in that the protective liquid is applied in the web direction after cleaning.