FI111653B - Method and apparatus for streamlining the papermaking process - Google Patents

Description

- 1 - 111653

METHOD AND APPARATUS FOR PAPER MANUFACTURING PROCESS

STRENGTHEN

The present invention relates to a process according to the preamble of claim 1, whereby the paper making process can be made more efficient.

With such a method, the papermaking process can be made more efficient and produce better quality paper. According to such a method, the operation of the wire section of a paper machine can be significantly improved. By means of method 10, e.g. minimizing the clogging of the wires used in the paper machine, keeping the permeability of the wires as good as possible, minimizing the amount of fines left on the wire, and thereby significantly improving the efficiency and runnability of the paper machine.

The invention also relates to a scarce device in the preamble of claim 10 for improving the efficiency of the papermaking process.

Several methods and devices are known in the art for cleaning paper machine wires. An example of this is the commonly used solution 20, in which a jet tube with nozzles is arranged in the cross-section of the machine. Typically, the nozzles are mounted in the nozzle tube at intervals of about 10 cm, and the tube is moved in a transverse direction by the oscillator so that each point of the wire is washed over time. High-pressure jets are commonly used in so-called "high pressure" jets. needle nozzles.

25

Finnish patent application FI 943764 discloses a wire cleaning device *, wherein the cross-directional blow-washing machine has two strips parallel to one another and transversely to the wire direction, a front list and a back list, each touching a rotating web 30. a blowing aperture connected to the pneumatic source, and a wedge tapered further between the front strip and the wire, -2 to 111653 where the water jet sprays the water jet so that the blower and the water jet are located across the wire.

Finnish patent application FI 924175 discloses a wire cleaning device 5 wherein, in a blow-washing machine extending across the wire, two parallel and transverse strips forming an inlet and a left-over, a contact between a wire and a wire, a formed wedge tapering in the direction of the wire into which the water spraying device 10 opens.

However, the prior art presents significant problems and drawbacks. Known washing machines consume a great deal of energy (e.g. compressed air) and are not always able to clean the wire sufficiently, leaving a 15 mm gap between the wires. fines that do not exit with a high pressure (= KP) jet. This can cause e.g. changes in wire permeability, whereby the water removal from the paper web is no longer smooth. The effect of the wire section has also been observed to increase due to this phenomenon. Observations in this direction have been obtained from so-called "paper machines" of several paper machines. wet felts. Due to its principle of operation, high-pressure jet can also cause co-20 unevenness in the wet fabric.

Thus, it is an object of the present invention to minimize the problems of the prior art. It is also an object of the present invention to overcome the drawbacks of the prior art and to provide a completely novel solution for keeping the paper machine wet wire 25 clean.

For the purposes of this application, pores of a wire structure are those portions of the wire structure which do not comprise its constituent material.

The invention is based on the idea of providing at least one sudden difference in pressure across the wire during its passage while the pores -3 to 111653 of its structure are substantially filled with a cleaning medium, preferably simultaneously of a sufficiently wide width.

More specifically, the method according to the invention is essentially characterized by what is stated in the characterizing part of claim 1.

The device according to the invention is essentially characterized by what is stated in the characterizing part of claim 10.

According to an advantageous embodiment of the invention, a device according to the invention is provided on the wire section of the papermaking machine, on which the web to be formed is already detached, providing at least one sudden differential pressure pulse across the wire while the pores between the wire structural material are substantially filled, preferably simultaneously, at a certain point 15 of sufficiently wide width. Preferably, such a differential pulse is a vacuum pulse on the paper side of the wire. According to current knowledge, one preferred device arrangement is one in which a profile with a suitable profile is provided. the cleansing strip is arranged near the paper side surface so that it touches the wire at least to the extent that the wire motion to produce a negative pressure, and wherein the means for supplying water to the wire 20 is adapted to the wire running direction of the strip, preferably very close to the strip. According to the invention, the cleaning effect can be increased if two successive sudden differential pressure pulses are produced over the wire during its passage while the pores of its structure are substantially filled with the cleaning medium, preferably over the entire width of the wire. The differential pressure pulses are then tracked so that an overpressure pulse is generated first and then a negative pressure pulse immediately thereafter. These differential pressure pulses provide the solids between the fabric fabrics as • shaken by applying successive opposing forces and thus aiding in the removal of solids. The gap time between the differential pressure pulses is very short for the effect to be effective. This difference in time between the differential pressure pulses is 0.05-230 ms, preferably 0.05-0.75 ms.

1 «-4- 111653

According to a preferred embodiment of the invention, the pores of the wire structure are filled with a substantially water-based cleaning medium by means of nozzles, preferably forming a fan-like flow pattern, while the machine is running and cleaning when necessary or desired, and the cleaning medium is sprayed with substantially all its pores and with water or other desired liquid and such that the cleaning fluid jet is preferably adjusted so that a portion of the jet, but not the entire jet, passes through the wire. In this way, the cleaning effect is optimized to affect both surfaces of the wire, but with greater power on the side to which the vacuum impulse is applied. The device arrangement for generating a relatively short-term negative pressure pulse of the invention, such as a strip, may be shorter in the cross-machine direction than the wire width, with associated transverse apparatus moving the device arrangement or part thereof across the wire. Preferably, however, the strip is substantially wire wide, whereby the cleaning effect extends simultaneously over the entire wire width.

15

Preferably, the shredding strip is shaped and arranged such that the movement of the wire adjacent to it causes a negative pressure proportional to the speed of the wire between the wire and the strip between the wire and the strip. According to the invention, a cleaning medium, such as water or other desired liquid or mixture thereof, is introduced into the fabric so that at least 20 sides of the wire strip are saturated with water so deep in the wire thickness direction that a differential pressure pulse of the invention is possible. Preferably, the fabric is treated with a cleaning medium such that substantially all of its pores and other free space are filled with the cleaning medium.

If it is desired to implement a method of providing two successive sudden opposing differential pressure pulses over a wire, the list is shaped so that it first causes an overpressure and then a negative pressure pulse as the wire passes over it. To achieve such an effect, the cleaning strip is preferably slightly rounded at its tip or otherwise suitably shaped such that an overpressure pulse of 30 wires is produced as the wire passes over it, and furthermore, the list is a suitable release angle. A suitable release angle has been found to be about 0.5-1.5 °. In addition, or alternatively, the list may also be provided with a stepwise change of the side profile.

-5- 111653

The introduction of a cleaning medium, such as an aqueous liquid, can be arranged, for example, by means of nozzles known per se in the front of the mold. However, the currently preferred method is to arrange a pool-like structure from which a uniform layer of water / mattress is introduced into the fabric just before the mold. Such a solution provides a controlled flow control as well as dosing and treatment of the cleaning medium.

The invention provides considerable advantages. According to such a method, the operation of the wire section of a paper machine can be significantly improved. With the help of the method, e.g. maintains the highest permeability of wet wires, minimizes fines remaining on the wire, and thereby significantly improves paper machine efficiency and runnability. The invention can be used as such, replacing the high pressure jets currently in common use, or alternatively, in addition to the high pressure jets, to remove the fines concentrated in the wire cycle which the high pressure jet alone cannot remove from the wire.

15

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a preferred embodiment of the invention in which the device according to the invention is exemplified in connection with a paper machine wire section 20, Fig. 2 shows a preferred embodiment of the invention, Fig. 3 Figure 4 illustrates another preferred embodiment of the invention, Figure 5 illustrates another preferred embodiment of the invention, Figure 6 illustrates another preferred embodiment of the invention, Figure 7 illustrates another embodiment of the invention affordable ·. Fig. 8 shows yet another preferred embodiment according to the invention, Fig. 9 shows yet another preferred embodiment according to the invention.

Fig. 10 shows a preferred embodiment of the cleaning list according to the invention.

Figure 1 schematically shows a wire section (10) of a papermaking machine. It consists of so-called. 10 from the lower wire unit (11) and the upper wire unit (12). Naturally, the construction of a wire section of a papermaking machine can vary widely, and the apparatus and method of the invention are, of course, applicable to all types of papermaking machines. With the wire section of the papermaking machine of Figure 1, the web is formed in a so-called. pulp pulp which is introduced from the headboard (13) onto the paper side of the wire of the bottom wire unit, which on this type of wire section is above 15 wire.

In the manufacture of paper with a wire section, the web is formed by evenly distributing the pulp stock over the wire surface. The wire portion of the loan is mechanically dewatered through the wire by various means known per se. This type of dewatering will inevitably result in some of the paper raw materials being removed from the web itself, either with the completely removed water or remaining in the wire. The remaining part of the wire is naturally harmful to the manufacturing process, and therefore it is sought to remove the wire and keep the wire clean. A commonly used solution is the so called. an oscillating high pressure water jet (14) to purify the wire. However, this has recently been found to be ineffective and has even been shown to cause adverse effects. FIG. a wire cleaning device (500) fitted to the bottom wire unit (11) for cleaning the wire. In this case, it is arranged in the so-called "underwire" of the lower wire. paper side to touch the wire its so-called. in the return cycle, that is, after the web has been removed from the wire and transferred to the press section. The wire cleaning device 30 according to the invention is here adjustably supported on the supporting structures of the machine, or so-called. peruskiskoon. The adjustment can be done manually, so that the adjustment is of a one-off nature. The adjustment can also be • automatically executed as a control of any suitable measurable variable -7- 111653. Such a control variable can be, for example, one or more of the following: wire tension, so-called. wire retention, wire permeability, machine speed, wire life, machine distance.

Figure 2 illustrates a preferred embodiment of the invention. The wire cleaning device (500) shown in Figure 2 comprises a support beam (501) which extends over the entire width of the wire and is further supported, for example, on the support structures of the papermaking machine, preferably as mentioned above. The cleaning device disclosed herein comprises a cleaning strip (502) which also extends substantially over the entire width of the wire (503). The device 10 is arranged in the immediate vicinity of the wire (503). It may be arranged such that the cleaning strip (502) only touches the wire (503) or, in some cases, when necessary or desired, the cleaning strip (502) may also fold the wire (503) at a desired angle. A first space (504) is provided in connection with the support beam, into which the cleaning medium can be brought together (505) while the machine is running and when cleaning is needed or desired. The cleaning medium, which preferably contains at least water, may be led from the first space to the second space (506) via flow equalizers (507) connecting the first and second spaces. In the case of Figure 2, the flow equalization devices are one or more apertures of suitable size. The cleaning strip (502) in the forward direction of the wire has a so-called "cleaning strip". a cleaning medium retaining strip (508) 20 disposed so that the surface of the cleaning medium can be raised in a second space (506) between the retaining strip and the cleaning strip to obtain a suitable wire; preferably according to the invention, to be filled with a cleaning medium. This e.g.

the second space bounded by the retaining strip and the cleaning strip forms a pool-like structure through which the cleaning medium can be introduced into the wire. Preferably, the retaining strip 25 is 0.5 to 10 mm, but most preferably 1-5 mm away from the wire, while the cleaning strip is preferably attached to the wire.

In the solution of Fig. 2, the retaining strip is formed by a so-called. From a T-rail with a suitable rounded profile. The retaining strip may also be mounted in an adjustable manner, wherein the distance of the retaining strip may be adjusted according to the pressure of the cleaning medium used or, for example, the speed of the machine described in:. with the arrows shown. As the wire passes by the holding and cleaning strip, -8-1111653 cleaning medium enters it. When a particular portion of a wire encounters a cleaning list, it is subjected to a force in its pores, a force exerted by a momentary increase in pressure (overpressure pulse) on the cleaning medium, and still further beyond this cleaning list, a solid, in a pulse, these solids are as if subjected to shaking and release from the wire by a momentary drop in pressure, a vacuum impulse. The aforementioned vacuum pressure pulse has a duration of at least equal to the vacuum pressure pulse, but more preferably 1-2 times.

10

Figure 3 shows a wire cleaning device (500) corresponding to the solution of Figure 2. In Fig. 3, the same numbering as that of Fig. 2 is used for clarity. In Fig. 3, the retaining strip (508) is made of a tubular element extending along a cleaning strip in the direction of the device. Here, too, the support beam is constructed slightly differently from the solution of Figure 2. In principle, the solution of Figure 3 functions like the solution of Figure 2.

Figure 4 shows a slightly different solution according to the invention. Figure 4 also uses the corresponding numbering of the reference numeral of Figure 2 for clarity. In Fig. 4, the retainer strip (508) is also made of a tubular element extending along a cleaning strip in the direction of the device. In the embodiment of the figure there is a:: a first space (504) is provided in connection with the retaining strip, into which a cleaning medium is brought into one (505) while the machine is running and cleaning when necessary or desired. The cleaning medium, which preferably contains at least water, may be passed from the first space to the second space (506) via flow equalizers (507) connecting the first and second spaces. The flow equalizers are, in the case of Figure 4, one or more openings of suitable size in the retaining strip structure.

In such a solution, the support beam may be constructed slightly smaller than, for example, the solution of Figure 2.

30

Figure 5 shows a slightly different solution according to the invention. It has: however, the same numbering as that of the other figures is used for clarity -9-111653. The wire cleaner device (500) shown in Figure 5 comprises a support beam (501) further supported, for example, on the support structures of the papermaking machine, preferably adjustable as mentioned above. The cleaning device disclosed herein comprises a cleaning strip (502) which preferably extends over the entire width of the wire (503). The device is arranged in the immediate vicinity of the wire (503) 5. It may be arranged such that the cleaning strip (502) only touches the wire (503) or in some cases, if necessary or desired, the cleaning strip (502) can also be folded. Next to the support beam, in the immediate vicinity of the cleaning strip (preferably <1m), a cleaning medium dispensing apparatus is provided, which in this embodiment is a tube (510) coupled with suitable means for bringing the cleaning medium into contact with the wire. In this embodiment, nozzles (511) are provided in the tube (510), which preferably form a fan-like flow pattern. The cleaning medium is introduced while the machine is running and, if desired or desired, by means of a tube (510) and sprayed onto the wire so that substantially all its pores and other free spaces are filled with a cleaning medium such as water or other desired liquid. Particularly in the method according to the invention implemented by the solution of Fig. 5, the cleaning medium jet is preferably adjusted so that a part of the jet, but not the whole jet, passes through the wire (512).

Another preferred embodiment of the invention is shown in Figure 6, however, with reference numerals corresponding to those of the other figures, for clarity. The wire cleaner device (500) shown in Figure 6 also comprises a support beam (501), which is further supported, for example, on the support structures of the papermaking machine, preferably as mentioned above. The cleaning device disclosed herein comprises a cleaning strip (502) which preferably extends over the entire width of the wire (503). The apparatus is arranged in the immediate vicinity of 25 wires (503). It may be arranged so that the cleaning strip (502) only touches the wire (503) or, in some cases, when needed or desired: the cleaning strip (502) can also fold up (503). This embodiment has a function similar to that of the embodiment of Figure 5, but additionally, the apparatus is provided with a venting device comprising a suction support (521) which, in the present embodiment 30, surrounds the purge strip (502). The suction log is limited to the proximity of the wire (503) before and after the cleaning strip (502) and is provided in this area: sealing devices (522) which may be, for example, ceramic or plastic strips, preferably 10-1166,53. A suction outlet (520) is also connected to the suction cup, whereby air is removed from the suction cups for further processing. The suction cup also includes means (523) for removing any liquid that may enter / separate therefrom. This solution minimizes the amount of water mist that may otherwise spread around the purifier device. The suction cup may also be adapted to suck up air and / or mist only from the back of the cleaning list, if desired or necessary. This embodiment provides an additional advantage in situations where a high pressure jet is used.

Figure 7 shows a preferred embodiment of the invention. The wire cleaner device (500) shown in Fig. 7 comprises a support beam (501), which is further supported, for example, on the support structures of the papermaking machine, preferably adjustable, as mentioned above. The cleaning device disclosed herein comprises a cleaning strip (502) which preferably extends over the entire width of the wire (503). The device is arranged in the immediate vicinity of the wire (503). It may be arranged such that the cleaning strip (502) only touches the wire (503) or, in some cases where necessary or desired, the cleaning strip (502) may also fold up (503). The embodiment of Fig. 7 corresponds in principle to the embodiment of Fig. 2, but in addition the device comprises means (530) for changing the direction of the liquid jet leaving the purge and / or for controlling the flow. In the solution of this Figure 20, the members are disposed in the area of influence of the cleaning strip, downstream of the wire, relatively close to the strip. Preferably, the members comprise a baffle plate of a purge strip for reversing the flow of liquid downwards. Here, this direction is advantageous, but of course the jet of liquid can be directed in other directions as needed or desired. The baffle is limited to the proximity of the wire (503) after the cleaning strip (502), and is provided in this area with sealing devices (532), which in this embodiment is a circular surface tube. Preferably, the space between the clamping strip and the clamping strip is sealed at the ends with sealing blocks (531). Although not shown in the figure, such a solution can also be combined with an air suction device between the members (530) and a beam (501), whereby the moist air 30 possibly containing cleaning fluid is sucked off while most of the fluid flow is directed downwardly.

-11- 111653

Figure 8 shows an embodiment in which the method of the invention is applied as a transverse device. The device is smaller in width than the width of the wire and is movably arranged in the vicinity of the wire in a so-called. traverse system. A support beam (510) is arranged in the vicinity of the wire (503), by which the wire cleaning device (500) comprising 5 cleaning strips (502) is movable transversely to the wire by means known per se. This solution cleans one zone at a time, but with a long run, the entire wire is cleaned.

Figure 9 shows an embodiment in which the method according to the invention is applied from above the wire to below. The wire cleaning device (500) shown in Figure 9 comprises a support beam (501) further supported, for example, on the support structures of the papermaking machine, preferably as mentioned above. The cleaning device disclosed herein comprises a cleaning strip (502) which preferably extends over the entire width of the wire (503). The device is arranged in the immediate vicinity of the wire (503). It may be arranged so that the cleaning strip (502) only touches the wire (503) or in some cases, if necessary or desired, the cleaning strip (502) can also fold. In connection with the support beam in the direction of the wire travel, in the immediate vicinity of the cleaning bar, a cleaning medium dispensing apparatus is provided, which in this embodiment is a tube 20 (510) connected with suitable means for bringing the cleaning medium into contact with the wire.

In this embodiment, nozzles (511) are provided in the tube (510), which preferably · form a fan-like flow pattern. The cleaning medium is brought in while the machine is running and, if necessary or desired, by means of a tube (510) and sprayed onto the wire so that substantially all its pores and other free spaces are filled with a cleaning medium such as water or other desired liquid. In the method of the invention implemented by the solution of Figure 9, the jet of cleaning medium is preferably adjusted so that a portion of the jet, but not the entire jet, passes through the wire (503). The apparatus is provided with a deaeration apparatus comprising a suction support. (521), which in the present embodiment is imaged to absorb air from the back side of the purge strip (502). The suction cup is adapted to be restricted to the proximity of the wire (503) after the cleaning strip (502), so that the suction effect of the suction cup is caused in the vicinity of the cleaning strip: The device also comprises a retaining strip (508) in the direction of movement of the wire (503) -12 to 111653 before the cleaning strip. A suction vent (520) is also connected to the suction cup, whereby the air is removed from the suction cup for further processing. Also, means (523) are provided on the suction cup for removing any liquid that may enter / separate therefrom from the suction cup. -This solution minimizes the amount of water mist spread around the purifier.

Figure 10 shows a preferred embodiment of the cleaning list according to the invention, and an exemplary differential pressure pulse profile caused by the cleaning list on the wire to be cleaned. The wire (503) deflects or folds over the cleaning strip (502) at its passage 10, whereby according to the invention at least one sudden differential pressure pulse is applied to the wire with the portion already stripped and the pores of the wire structure substantially filled with cleaning medium.

The cleaning strip of FIG. 10 causes two successive sudden differential pressure pulses of 15 across the fabric, while its pores are substantially filled with a cleaning medium of sufficient width. Differential pressure pulses are generated by first producing an overpressure pulse and then immediately under a negative pressure pulse, whereby the differential pulse impulses are used to shake solids between the fabrics of the fabric, causing successive opposing forces and thereby facilitating the removal of solids. The wire meeting tip (550) of the strip (502) is preferably rounded, whereby the first overpressure pulse is *: effective, and further the strip is followed by a release angle (551) or a step (552) (shown by a dashed line). Fig. 10 also shows an adjustably arranged retainer strip (508).

25

The efficiency of the invention is given by the following machine speed_pressure: ....... ......... . m / min bar sign for good image. The invention is characterized by -50 ^ "-

the fact that it utilizes the machine's speed .......................................... 750 ............................................ ..... ................ 9-7P

1000 1.39, which is the speed of the wire. The following table 1250 2.17 30 shows a theoretical vacuum impulse that can be achieved by the method and apparatus of the invention for cleaning the wire. Even with current board machine speeds (500 - 750 m / min), moderate pressure pulses can be achieved - 13 - 111653 without the actual external power source. For paper machine speeds (1000-1250), instantaneous vacuum of up to more than 2 bar can be achieved.

The device according to the invention provides a differential pressure pulse on the wire, which preferably has an effect time of about 0.5 to 7 ms depending on the speed of the machine.

Although the invention has been described herein in light of certain embodiments, it can, of course, also be applied to other types of solutions. Also, the invention is not to be construed as limited to the following examples, but all solutions obvious to one skilled in the art, as defined in the appended claims, are possible.

Claims (21)

A method for enhancing the papermaking process, characterized in that in method 5, a cleaning medium is introduced into the wire such that the pores of the wire structure are substantially filled with the cleaning medium and the method for cleaning the wire used in the wire section of the papermaking machine provides at least one sudden differential pulse, , from which the web has already been removed. 10 Method according to Claim 1, characterized in that two successive sudden differential pressure pulses are applied to the wire during its passage while the pores of its structure are substantially filled with a cleaning medium, preferably simultaneously of a sufficiently wide width. Method according to Claim 2, characterized in that the differential pressure impulses are implemented by first applying an overpressure impulse and then immediately under a negative pressure impulse, whereby the differential pressure impulses cause the solids between the fabrics to be shaken by causing successive opposing forces and thereby promoting solids. Method according to claim 3, characterized in that the time difference between the pressure pulses is 0.05 - 2 ms, preferably 0.05 - 0.75 ms and the vacuum pulse has a duration at least equal to the pressure pulse, but more preferably 1-2 times. Method according to one of Claims 1 to 3, characterized in that the differential pressure pulse (s) is applied to the paper side of the wire. 111653 -15- Method according to one of Claims 1 to 3, characterized in that the differential pressure pulse (s) is applied inside the wire. A method for enhancing the papermaking process according to claim 1, characterized in that the pores of the wire structure are filled with a water-based cleaning medium with a basin-like structure arranged just before the strip, from which a uniform layer of water / mattress is introduced into the wire. Method for enhancing the papermaking process according to claim 1, characterized in that the pores of the wire structure 15 are filled with a cleaning fluid consisting essentially of water by means of nozzles (511) which preferably form a fan-like flow pattern while the machine is running and cleaning when necessary or desired. that substantially all of its pores and other free spaces are filled with a cleaning medium, such as water or other desired liquid, and that the jet of cleaning medium is preferably adjusted such that part of the jet, but not the entire jet, passes through the wire (512). »·« Method for enhancing the papermaking process according to claim 1, characterized in that, when the differential pressure pulse is applied or thereafter, near the wire: the mist generated when the differential pressure pulse is generated is suctioned out of the vicinity of the wire. 10. An apparatus for enhancing a papermaking process, said device being fitted near the wire used in the paper machine wire section, 'characterized in that * - 16 111 653 the device comprises in the vicinity of at least having a suitable profile of the cleansing strip adapted to, for example, the wire of the paper side surface so that over the wire, causing at least one sudden differential pressure the differential impulse and the device comprise means for introducing water arranged into the wire before the list, preferably close to the list. Device for enhancing the papermaking process according to claim 10, characterized in that the cleaning strip is substantially wire-wide and comprises means for bringing the cleaning medium 10 over the entire width of the wire, thereby extending the cleaning effect over the entire width of the wire. Apparatus for enhancing the papermaking process according to claim 10, characterized in that the squeezing strip 15 is preferably shaped such that the strip is provided with a release angle or step, preferably with a release angle of about 0.5-1.5 °, a vacuum proportional to the speed of the wire. Device for enhancing the papermaking process according to claim 10, characterized in that. the cleaning strip is rounded at its tip or otherwise suitably shaped so that the movement of the wire touching it provides an overpressure pulse list at the inlet edge as the wire passes over it. 25 Apparatus for enhancing the papermaking process according to claim 10, characterized in that the cleaning strip is rounded at its tip or otherwise suitably shaped so as to cause an overpressure pulse of the wire as it passes over it and has a release angle or 30 steps. a vacuum proportional to the velocity of the wire between the wire and the strip. * - 17- 111653 Device for enhancing the papermaking process according to claim 12 or 14, characterized in that the step is about 0.5 to 2mm high. 5 Device for enhancing the papermaking process according to claim 13, characterized in that the device comprises nozzles for introducing a cleaning medium, such as an aqueous liquid, upstream of the wire. 10 Device for enhancing the papermaking process according to claim 10, characterized in that the device comprises a pre-molded basin-like structure from which a uniform layer of water / mattress can be guided into a wire, and the basin-like structure is preferably limited by two cleaning strips and a retainer. Device for enhancing the papermaking process according to claim 10, characterized in that the device (500) comprises 20 cleaning strips (502) extending preferably over the entire width of the wire (503) and a deaeration device comprising a suction log (521) bounded by the wire. (503) at least after the cleaning strip (502) and is provided in this area with sealing devices (522) arranged in the vicinity of the wire, preferably ceramic or plastic strips or the like, preferably extending over the entire width of the suction cup to which the suction (520) for transferring air from the suction support for further treatment, and means (523) therefor; ti to remove any leaking / separating fluid from the suction cups. Device for enhancing the papermaking process according to claim 10, characterized in that the device (500) comprises a support beam (501), a cleaning strip (502) extending preferably over the entire width of the wire (503), and means (530) to reverse direction and / or to calm the flow disposed in the area of influence of the scrubbing strip downstream of the wire relatively close to the strip, preferably comprising at least a baffle length of the scrubbing strip or the like to reverse the flow of fluid. 5 Device for enhancing the papermaking process according to claim 17, characterized in that the retaining strip is adjustably adapted to the cleaning device. Device for enhancing the papermaking process according to claim 10, characterized in that the device is smaller in width than the wire and is movably arranged in the vicinity of the wire in a so-called. traverse system. * · '4 «* i 111653 19