EP2783039A1 - Procédé permettant de transférer une bande de matériau d'un dispositif de séchage à une unité fonctionnelle située en aval et dispositif de séchage - Google Patents

Procédé permettant de transférer une bande de matériau d'un dispositif de séchage à une unité fonctionnelle située en aval et dispositif de séchage

Info

Publication number
EP2783039A1
EP2783039A1 EP12790501.6A EP12790501A EP2783039A1 EP 2783039 A1 EP2783039 A1 EP 2783039A1 EP 12790501 A EP12790501 A EP 12790501A EP 2783039 A1 EP2783039 A1 EP 2783039A1
Authority
EP
European Patent Office
Prior art keywords
drying
tzn
belt
material web
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12790501.6A
Other languages
German (de)
English (en)
Other versions
EP2783039B1 (fr
Inventor
Norbert Karner
Erich Rollenitz
Andreas Ziegelwanger
Wolfgang Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2783039A1 publication Critical patent/EP2783039A1/fr
Application granted granted Critical
Publication of EP2783039B1 publication Critical patent/EP2783039B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders

Definitions

  • the invention relates to a method for transferring a material web, in particular a fibrous web in the form of a paper, board or tissue web of a dry assembly of a machine for producing such a material web, in which the material web supported on an endlessly circulating dry belt alternating over a plurality of heated drying cylinders under direct contact with their surface and arranged therebetween deflecting rollers, to a downstream of the drying assembly functional unit at startup or after a disturbance by transferring a AufzhoustMails, in which in a process stage, at least a partial strip of the web from the dry assembly or the web web width in a arranged below the drying arrangement collecting device is performed.
  • the invention further relates to a drying device of a machine for producing a material web.
  • the transfer takes place by removing the material web or a Auf KunststoffstMails on the dry belt.
  • the residual web is guided into a collecting device in the form of a pulper.
  • the invention had the object of further improving a method for guiding a material web or a partial strip of these in a collecting device, in particular to ensure even safer and more stable.
  • the solution according to the invention should be suitable for embodiments of dry arrangements in which due to the arrangement of the drying cylinder, a decrease of the drying cylinder itself is not possible or only against the direction of gravity.
  • the solution according to the invention is characterized by the features of claims 1 and 10. Advantageous embodiments are described in the dependent claims, which can be used individually or in combination with each other with the features of the independent claims in an advantageous manner.
  • An inventive method for transferring a material web, in particular a fibrous web in the form of a paper, board or tissue web of a drying arrangement of a machine for producing such a material web in which the material web supported on an endlessly circulating dry belt alternating over a plurality of heated drying cylinders in direct contact with their surface and in between arranged deflection rollers is guided to a downstream of the drying assembly functional unit at startup or after a disturbance by transferring a AufzhoustMails, in which at least one sub-strip of the web of material from the drying arrangement or the web web web width is guided in a arranged below the drying arrangement collecting device in a process stage; Is characterized in that the material web or the partial strip of the material web is guided on the in the direction of passage of the web through the drying arrangement last drying cylinder of the drying arrangement on the dry belt in the, in particular offset in the vertical direction catcher.
  • a partial strip is understood to be a strip of a material web whose extent in the width direction is characterized by a width in the longitudinal direction and whose extent in the width direction is smaller than the width of a completely wide-traveled material web.
  • the partial strip can be present as a leader strip or residual web.
  • a leader strip serves to transfer the material web between successively arranged functional units.
  • the extension in the width direction is characterized by a substantially smaller width than in the longitudinal direction.
  • the width of the Aufzhoustsammlungs can vary in the longitudinal direction, in particular be characterized by a steady change or kept constant over a predefined length range.
  • Such Aufzhoustsammlung are usually formed by so-called edge strips, which are generated in the lateral end portions of the web by cutting them with further formation of a residual web.
  • a residual web is understood to mean that part of the material web which, after being severed, in particular separation of the leader strip from the material web, remains. Widening the web to the desired width means changing the width of the leader in the cross-machine direction while reducing the width of the remainder web by changing the position of a separator for separating the web into the leader and a remnant strip.
  • the term dry belt comprises at least one endless, i. As a loop present band in a variety of designs, which is guided over guide rollers and driven by at least one drivable roller. By the drive this runs around.
  • the dry belt is preferably a dryer fabric.
  • the direction of rotation of the drying belt coincides in the support region for the material web with the direction of passage of the material web through the drying arrangement.
  • Subordinate functional units are assemblies, assemblies, devices and / or facilities that serve the further guidance and / or treatment of the material web or web components.
  • it may, for example, be one of the following functional units: a further drying arrangement, a reeling device for the material web, a smoothing device or a downstream application device.
  • a collecting device is understood to mean a device which serves for receiving and / or storing and / or at least partially processing at least parts of the material web.
  • the solution of the invention allows the support on the dry belt, the safe transfer of a partial strip of a web or the web with full width in a vertical direction to the dry assembly, especially a portion of this offset catcher in transfer situations, in which the web on the drying cylinder or not in the direction of gravity to lose weight.
  • the inventive Solution is thus particularly suitable for guiding partial strips or the entire material web of single-row drying arrangements whose drying cylinders are arranged one above the other in a vertical position with respect to their longitudinal axes in alignment or offset with each other such that a theoretical connecting line by their longitudinal axes in the vertical direction or inclined a vertical plane runs.
  • the inclination angle can be in the range of 70 ° to 1 10 °.
  • the solution according to the invention is also suitable for guiding partial strips or the entire material web from inverted single-row drying arrangements, i. arranged in series drying cylinders arranged therebetween deflecting rollers whose longitudinal axes are arranged in the vertical direction above the longitudinal axes of the drying cylinders.
  • the material web or the partial strip of the material web after expiration of in the direction of passage last drying cylinder on the drying belt via a, formed by a portion of the circulation path of the dry belt holding area to a characterized by the detachment of the web or the partial strip from the dry belt release area guided over this, wherein over at least a portion of the holding area, the material web or the partial strip is held by negative pressure on the drying belt.
  • the partial strip or the entire material web can be transferred after a demolition in a firmly defined position relative to the drying belt in the collecting device.
  • the guidance of the material web or of the partial strip takes place within the holding region with the drying belt via a latter
  • Drying cylinder downstream besaugbare roller After the suctionable roller, the material web or the partial strip is released from the drying belt and sucked into the collecting device.
  • the suctionable roll is used to optimize by their position relative to the drying cylinder descriptive course of the holding area and for guiding the material web in the direction of collecting device arranged such that it is wrapped in installation position at least over a portion of the outer periphery above a characterized by the longitudinal axis of the besaugbaren roller and a perpendicular to this in a horizontal plane level of the dry belt.
  • Main advantages of the suctionable roller are the possibility of a
  • the material web or the partial strip of the material web is held on the drying belt by applying negative pressure to the drying belt in the region of the holding region between a discharge line of the drying belt from the last drying cylinder and the suctionable roller. This measure allows safe guidance in a fixed position relative to the drying belt to the release area.
  • this is fed after release from the drying belt in the collecting device, for example by means of both sides of the web or strip arranged Pulperspritzrohren or sucked.
  • This solution is particularly suitable when using collecting devices with small inlet openings, collecting devices, for which only a small amount of space is available in order nevertheless to ensure fast and safe transfer into them.
  • the guide according to the invention of the material web or a partial strip of the material web into a collecting device forms an essential part of a transfer process.
  • a leader strip by separation of the Material web generated from this.
  • the discharge line of the drying belt and when guiding web material components, in particular the Aufzhoustsammlungs or the entire web at this last drying cylinder describes the local course of detachment of the dry belt or web components from the outer circumference of the drying cylinder in the cross-machine direction and is in idealized form by a parallel to the longitudinal axis of Drying cylinder characterizable.
  • the Aufzhoust Shape is performed in a first embodiment as a partial strip of the material web in the collecting device and subsequently driven to full width in the collecting device.
  • the leader strip after the last drying cylinder of the drying assembly, is guided by the drying belt into the looping area of the drying belt with the sweeping roll downstream of the last drying cylinder, removed from the drying belt in a take-off area within the wrap area and transferred to the downstream functional unit.
  • the acceptance region describes an area at which the material web, in particular the leader strip, is removed from the drying belt. In an idealized form, this can be described by a take-off line.
  • the removal region is located in the first or fourth quadrant with respect to a coordinate system laid in the first or fourth quadrant through the longitudinal axis of the suctionable roll and is thus easily accessible.
  • the arrangement of the removal area in the upper half of the suctionable roller allows the targeted removal of a AufzhoustMails and from this position safe transfer of this in a downstream functional unit also for arrangements of the drying cylinder, in which no decrease of these is possible.
  • the suction is carried out at least in the region of the removal region, preferably in the entire wrap around the dry belt with the besaugbaren roller. Through the suction, the removal position of the AufzhoustMails and its orientation is fixed and thus enables a secure positioning relative to the removal device.
  • the Besaug sadness serves In this case in function concentration different tasks, once the leadership of ab directed toden leader strip and further the leadership of the web or the sub-strip of this in a catcher.
  • the provision of the provided for the transfer guide strip can be done in various ways.
  • the material web can be subdivided in a first basic design into the last drying cylinder of the drying arrangement in the direction of passage of the drying belt or according to a second basic embodiment into the last drying cylinder, in particular between the discharge line of the drying belt from the last drying cylinder and the suctionable roll, and a residual web.
  • the first basic version includes a multitude of sub-variants, which are individually considered to be particularly suitable for certain applications.
  • the subdivision of the material web is preceded by a first drying cylinder of the drying arrangement.
  • the separation may be on the dry belt or supported on another movable surface.
  • the separation can be done, for example, in a vertical arrangement of the drying cylinder on the top in the installed position deflection roller.
  • the advantage of this design is in the arrangement of the separator available space and the possibility of shifting into areas with correspondingly freely accessible space.
  • the material web is subdivided between a deflection roller arranged upstream of the last drying cylinder in the direction of passage of the material web or circulation direction of the drying belt and the last drying cylinder.
  • the separation preferably takes place in the looping area of the drying belt with the deflection roller.
  • This sub-variant is characterized in that the possibility of Thomasgutaustragung with the dry belt with provision of an air knife in Cutting area and / or the arrangement of facilities for collecting the clippings is given.
  • the separating position between the first and last drying cylinder of the drying arrangement is arranged.
  • the second basic embodiment of the separation of the AufzhoustMails only after the last in the direction of travel of the web or the direction of rotation of the drying belt drying cylinder offers the advantage of a short transfer path for the AufzhoustMail to the removal area on the besaugbaren roller. Measures on the drying belt to fix the AufzhoustMails on this before the acceptance area can be minimized or avoided altogether. In all versions of a separation on the drying belt this is associated with a device for the cleaning of clippings and conditioning.
  • the negative pressure in the removal area on the besaugbaren roller and / or on the dry belt in the area between drainage from the drying cylinder and besaugbarer roller and / or the expiration of the dry belt arranged downstream of the suctionable roller according to at least one of the following options:
  • the adjustability is firstly an optimization of the required in the individual operations guides of web components, also the negative pressures are applied only when they are actually needed, so that the dry assembly is energy efficient operable.
  • the drying device of a machine for producing a material web, in particular fibrous web in the form of a paper, board or tissue web with at least one drying arrangement and a Guide device for guiding the material web or a partial strip of the material web in a arranged below a portion of the drying arrangement catcher wherein in the direction of passage of the drying device last drying arrangement comprises a plurality of drying cylinders and deflection rollers arranged therebetween and a drying belt for alternately guiding the web over the drying cylinder and guide rollers
  • the guide device comprises a downstream in the direction of rotation of the drying belt last cylinder roller as a guide roll for the drying belt and at least one of these downstream further guide roller, which is arranged opposite to the last drying cylinder downstream roller, between the roller and the further guide roller perpendicular or opposite a vertical plane inclined to realize extending portion of the circulation path of the dry belt, wherein the collecting means below this portion of the Uml Aufweges is arranged, characterized in that the last drying cylinder downstream roller is
  • the embodiment of the invention offers the advantage of a secure guidance of the material web or a partial strip of these in a collecting device of dry arrangements, in which a decrease of these on the drying cylinder is not useful, for example, when taking against the direction of gravity.
  • a decrease of these on the drying cylinder is not useful, for example, when taking against the direction of gravity.
  • the means for holding the material web or a partial strip advantageously additionally comprise a device for generating a negative pressure associated with the drying belt between the discharge line on the drying cylinder and the suctionable roller.
  • the device stabilizes the material web or the partial strip on the drying belt in a simple manner.
  • the transfer device comprises a device arranged downstream of the drying belt of the continuous line of the drying belt at the suctionable roller for applying a negative pressure.
  • a transfer device for a slit strip which utilizes components of the guide device in functional concentration.
  • the decrease of the AufzhoustMails takes place on the suctionable roller from the dryer, whereby a firm acceptance position can be ensured.
  • the transfer device comprises a blowing device. The transfer takes place without ropes and precisely.
  • the transfer device has one of the blowing device for releasing a transfer strip in the removal area on the dry belt
  • downstream transfer device in particular one or more parts
  • the dry belt between the discharge line on the drying cylinder and besaugbarer roller associated means for generating a negative pressure and the besaugbare roller at least one over the theoretical width of the AufzhoustMails extending zone and another parallel over the extension of the besaugbaren roller to the longitudinal axis extending zone, which are separated from each other and / or can be switched off.
  • said device can also serve to stabilize the residual web as a partial strip of the material web.
  • the suctionable roller has a diameter of> 700 mm, preferably in the range between 1200 mm and 1500 mm inclusive.
  • the besaugbare roller at a distance to the downstream functional unit, in particular next guide roll in the machine direction in the range between 3000 mm and 1500 mm, preferably 3000 mm and 2500 mm.
  • a separator for dividing the material web is provided in a Auf Japanstsammlung and a residual web as a partial strip.
  • This can be designed in various ways and be associated with the dry belt or a, the material web supporting the movable surface.
  • the separation device can be characterized by the use of different separation media. For example, cutting devices in the form of air or water jet cutting devices are conceivable.
  • the arrangement can be carried out upstream of the last drying cylinder of the drying arrangement, depending on the design and construction of the drying arrangement in a first basic design. In the immediate Vor Mr, preferably in Umschlingungs Kunststoff this upstream diverting an air knife on the dry belt is arranged for Thomasgutab arrangement on the dry belt.
  • the separating device is arranged upstream of the first drying cylinder of the drying arrangement in a further sub-variant of the first basic version.
  • the arrangement then takes place either at the beginning of the drying arrangement or a functional unit upstream of the drying arrangement.
  • the separator is downstream of the sequence of the drying belt from the last drying cylinder of the drying arrangement, preferably assigned in the wrap of the dry belt with the besaugbaren roller the dry belt, resulting in very short transfer paths to the removal area.
  • the drying apparatus is preferably designed and constructed in such a way that at least a portion of the drying cylinders in the end region of the last drying arrangement are arranged offset from one another in the vertical direction, wherein the longitudinal axes are free of offset in the machine direction to each other or offset in the machine direction to form a tilted relative to a vertical plane Dry arrangement are arranged. This design allows easy and quick removal of waste.
  • At least a part of the last drying arrangement is designed as an inverted single-row drying arrangement.
  • the drying cylinders in the end region of the drying arrangement are arranged in the machine direction in a spaced row and the longitudinal axes of the intermediate idler rollers and the suctionable roller in the vertical direction above the longitudinal axes of the drying cylinder.
  • Figure 1 illustrates an embodiment of a drying arrangement
  • FIG. 2 illustrates, on the basis of a signal flow diagram, the method steps characterizing a transfer of the material web
  • FIG. 3 shows, in a simplified schematic representation, a design of a separating device
  • Figure 4 illustrates different arrangement options a
  • Figures 5a and 5b show a possible subdivision of the suction region of the suctionable roller in the circumferential direction and transversely to this;
  • FIG. 7 illustrates a subdivided version of a transfer belt
  • FIG. 8 and 9 show possible arrangements of the besaugbaren roller against the last in the direction of travel of the web drying cylinder;
  • FIG. 10 shows a possible arrangement of the transfer device in an inverted single-row drying arrangement;
  • FIG. 11 illustrates, by way of example, possible arrangements of the dry arrangement in a machine for producing a material web.
  • FIG. 1 shows, in a schematized and highly simplified representation, a detail of a drying arrangement 1 for use in machines for producing a fibrous web F in the form of a paper, board or tissue web, the arrangement and mode of operation of a guiding device 34 according to the invention for guiding at least one partial strip fibrous web F, in particular a Aufzhoustsammlungs AS ' or a residual web RS or the entire fibrous web F ' in a vertically offset catcher, in particular arranged below a portion of the drying arrangement pulper 18.
  • Figure 1 also illustrates the arrangement and operation of a transfer device 2 for a AufgarstMail AS with the removal of a drying belt 3 and transfer to a downstream, the fibrous web F further processing or processing functional unit 4.
  • components of the guide device 34 and the transfer device 2 are formed of the same components.
  • a coordinate system is applied to the dry arrangement 1 by way of example.
  • the X-axis describes the longitudinal direction of the extension of the machine and is therefore also referred to as the machine direction MD. This corresponds to the direction of passage of the material web through the machine for producing these.
  • the Y direction describes the direction transverse to the machine direction and is therefore also referred to as the cross-machine direction CD.
  • the Z direction corresponds to the height direction.
  • the drying arrangement 1 comprises at least one, preferably a plurality of drying cylinders TZ1 to TZn.
  • the last drying cylinder TZn and TZn-1 shown in the feedthrough direction of the fibrous web F are shown by way of example.
  • the fibrous web F is guided meandering alternately over the drying cylinders TZ1 to TZn and deflection rollers 5 arranged therebetween during normal operation of the drying arrangement 1 by an endlessly circulating drying belt 3 in the form of an air-permeable drying wire in the illustrated area of the drying arrangement 1.
  • the guide is always supported on the dry belt 3.
  • a Aufzhoust Shape AS is transferred to the downstream functional unit 4 and driven after the transfer, the fibrous web to its desired width.
  • the fibrous web F is moved by the width of a pathway, in particular a pulper 18, downstream of the last drying cylinder TZn of the drying arrangement 1 in the direction of passage, which is arranged below the drying arrangement 1. Notwithstanding the web-width guidance, it is also possible to guide a partial strip in the form of a threading strip AS ' or a residual web RS into the catching device in accordance with the mode of operation of the drying arrangement.
  • the guide of the fibrous web F or the partial strip is carried out according to the invention supported on the dry belt 3.
  • means 36 are provided which define a holding portion 37 for the fibrous web or the partial strip on the dry belt 3 in the entirety of their mode of action.
  • the means 36 and the holding portion 37 are part of the guide 34.
  • the detachment of the fibrous web or the partial strip from the dry belt 3 takes place in a release area 35.
  • the holding portion 37 extends over a portion of the circulation path of the dry belt 3, starting from a discharge line AL on the drying cylinder TZn to the release area 35.
  • the drying arrangement 1 is designed in such a way that, in the region upstream of the functional unit 4, it is suitable to dry only one side of the fibrous web F by contact drying. That is to say that this area is single-row, wherein the arrangement of the drying cylinders TZ1 to TZn can vary.
  • FIG. 1 shows a detail of a substantially vertical arrangement of the individual drying cylinders TZn-1 to TZn relative to the installation position.
  • the longitudinal axes L T z n -i to L T zn of the individual drying cylinders TZn-1 to TZn extending in installation position in the cross-machine direction CD are arranged parallel to one another and offset from one another in the vertical direction.
  • the theoretical connecting line through the longitudinal axes of the drying cylinders TZn, TZn-1 is characterized by a straight line, which runs perpendicular to a horizontal plane in FIG. Arrangements are also conceivable which can be described by an inclination of the theoretical connecting line through the longitudinal axes of the drying cylinders TZn, TZn-1. In this case, the Arrangement of the drying cylinders considered with additional offset in the machine direction MD.
  • the fibrous web F is guided under direct contact with the lateral surface 10.1 to 10.n of the individual drying cylinders TZn-1 to TZn, each over a partial area of the outer circumference thereof.
  • the individual guide rollers 5 are arranged between two adjacent in the direction of rotation of the drying belt 3 drying cylinders TZn, TZn-1, i. whose longitudinal axes are arranged offset to those of the drying cylinder in the vertical and horizontal directions.
  • the guide rollers 5 are preferably designed as besaugbare guide rollers.
  • the suction can be done either directly over the interior of the guide rollers 1 1 1 or indirectly via the outer circumference 12 of the guide rollers 5 arranged suction boxes.
  • the deflection rollers 5 are arranged inside the drying belt 3, i.
  • the drying cylinders TZn-1 and TZn are arranged outside of the loop formed by the drying belt 3 and contact in non-operation with a portion of their lateral surfaces 10.n-1, 10.n the Outside of the dry belt 3 3.
  • the dry belt 3 presses the fibrous web F against the surface formed by the lateral surface 10.n-1, 10.n of the respective drying cylinder TZn-1, TZn from, and thus improves the heat transfer to Fibrous web F.
  • the fibrous web F is guided on the outer side 15 of the drying belt 3. During the wrapping of the guide rollers 5, the fibrous web F is then at this outside, ie the surface of the guide rollers 5 contacted directly the dry belt 3.
  • the jacket of the individual guide roller 5 is preferably executed in the illustrated embodiment with a perforation and the interior 1 1 with one in particular not connected vacuum source connected.
  • suction boxes 13 On the negative pressure of the fibrous web F between drying cylinder TZn-1 and guide roller 5 is sucked to the drying belt 3. It is also conceivable to use the suction boxes 13 additionally or alternatively to the suction of the inner space 1 1 of the respective guide roller 5.
  • a guide roller for the dry belt 3 in the form of a besaugbaren roller 6 is arranged, which is arranged such that these viewed in the installation position at least over a portion of its outer periphery 7 above a plane E, through the longitudinal or rotation axis R of the suctionable roller 6 and a vertical in the horizontal plane or machine direction MD is characterized, is wrapped by the dry belt 3.
  • the suctionable roller 6 must be wrapped in the region of its upper half in the installed position over at least a portion of its outer periphery 7 of the dry belt 3.
  • the transfer device 2 comprises a removal device 8, which may be designed in various ways. This is the dry belt 3 im Assigned to the acceptance area AB.
  • a take-off device 8 suction and / or blowing devices are used, which transfer the Aufzhoustsammlung AS directly or indirectly via further transfer devices, for example in the form of a conveyor belt 9 to the next functional unit 4.
  • the conveyor belt 9 is preferably designed as a vacuum belt. The design can be one or more parts.
  • the decrease of the dry belt 3 takes place in a particularly advantageous manner on the besaugbaren roller 6 in the wrapping region of the dry belt 3 with this, in particular a region of the outer periphery 7 of the suctionable roller 6 above the plane formed by the axis of rotation R and perpendicular to this in the MD direction E.
  • the acceptance range AB can ideally be described by a line running in the cross-machine direction CD.
  • the removal area AB is in the installation position of the suctionable roller 6 shown in Figure 1 within the 4th squares of these in the view of this in the MD / Z plane of the machine or with respect to the plane E in an angular range between each including 0 ° and 180 °, preferably 0 ° and 90 °.
  • the besaugbare roller 6 is preferably designed with a diameter> 700mm, preferably in the range between 1200 mm to 1500 mm.
  • the arrangement of the suctionable roller 6 with respect to the following functional unit 4 is preferably characterized by the following dimensional ranges:
  • Figure 1 illustrates the necessary for the transfer operation of a AufzhoustMails AS facilities, in particular a the dry belt 3 after the flow line AL at the drying cylinder TZn associated acceptance device 8 and optionally further facilities, such as a conveyor belt 9.
  • the transfer process only the AufzhoustMails AS designed as in the flowchart according to FIG. 2 as method steps VA to VC.
  • the threading strip AS is removed from the drying belt 3 behind the discharge line AL at the last drying cylinder TZn, which also corresponds to the discharge line of the drying belt 3 from the drying cylinder TZn, and transported to the downstream functional unit 4 in method step VB.
  • the fibrous web F can be driven to full width according to VC.
  • the mode of operation of the drying arrangement 1 as a whole during a transfer operation after a service interruption is as shown in the flowchart according to FIG.
  • the fibrous web F is discharged in a region upstream of the source of interference into a collecting device, in particular a pulper 18 and a new track of the fibrous web.
  • a Auf Kunststoffst Shape AS ' preferably generated in the form of a marginal strip, which is guided by the individual successively arranged functional units of the machine until the fibrous web on again their full width can be driven. If such a threading strip AS 'is guided in a drying arrangement 1 with a suctionable roll 6 downstream of the last drying cylinder TZn in the manner described, this is not necessarily transferred immediately to the following functional unit 4, but into a drying unit 1 below arranged catcher, in particular a pulper 18 performed according to step V01.
  • the guide is preferably ropeless.
  • the area between the last drying cylinder TZn and the suctionable roll 6 and preferably also a drying roll 3 after the besaugbaren roller 6 leading guide roll 19 with a negative pressure, preferably a vacuum can be acted upon.
  • the application can be realized by means arranged on the inside 14 of the drying belt 3 and the suctionable roller 6 downstream device 21 for applying a negative pressure.
  • the guide roller 19 is disposed below the besaugbaren roller 6, preferably their spaced apart in the vertical direction longitudinal axes in the vertical direction in alignment, that is arranged free of offset in the MD direction.
  • the guide roller 19 preferably has a smaller diameter than the suctionable roller 6, so that the drying belt 3 is guided at an angle with respect to the vertical direction between the suctionable roller 6 and guide roller 19, to allow easy removal of the Auf 2015stMails AS ' in the pulper 18 ,
  • the distance between the besaugbaren roller 6 to the next guide roller in the machine direction is selected such that it is in the range between each including 3000 mm and 1500 mm, preferably 3000 mm and 2500 mm ,
  • the opening of the pulper 18 is preferably closed by choice. This is closed during operation and opens automatically when demolished or by the weight of the reject.
  • Pulperspritzrohre which are arranged on both sides of the introduced into the pulper 18 partial strip or the fibrous web.
  • the guide roller 19 are provided in the direction of rotation of the dry belt 3 at this stripping means 38.
  • a Abl Harborblasrohr 39 is provided, which is arranged in the direction of rotation of the drying belt 3 in front of the guide roller 19 and the gusset between dry belt 3 and guide roller 19 applied, ie blowing in the gusset between rising dry belt and guide roller 19. This serves to support the detachment of the fibrous web or a partial strip, in particular AufzhoustMails AS ' or the residual web RS.
  • the individual devices 16 and 21 can also be formed by one unit.
  • a negative pressure, in particular the vacuum specifically at the required areas free from impairment of adjacent areas in the drying arrangement 1, said area is preferably sealed off from the environment surrounding it, for example by means of a corresponding cover plate 20.
  • the fibrous web is moved as fibrous web F ' in step V02 to the desired width.
  • the wide-traveling or end-to-end wide-spread fibrous web F ' is also guided on the drying belt 3 to the pulper 18 in step V03 out.
  • the fibrous web F ' is acted upon by the negative pressure of the device 16 and the suctionable roller 6 to remain on the drying belt 3 until the expiration of the besaugbaren roller 6 and this downstream in the region between the besaugbaren roller 6 and the guide roller 19.
  • the actual AufgarstMail AS is generated by the wide-traveled fibrous web F 'is divided into a Auf woolstMail AS and a residual web RS in V04.
  • the Residual web RS is guided into the pulper 18 - V05 and the Aufzhoustsammlung AS according to VA transferred to VC in Figure 2 to the downstream functional unit 4 and the fibrous web F driven to desired width.
  • the wide-traveled fibrous web F is then no longer guided in VD to the removal area AB on the besaugbaren roller 6 but raises according to the imaginary line connecting the downstream functional unit, for example, the transfer belt 9 earlier from the dry belt 3.
  • This area is designated by 24 and is preferably within the Umschlingungs Schemees of the dry belt 3 with the besaugbaren roller 6 in front of the removal area AB for the AufzhoustMail AS.
  • the transferred wide-traveled fibrous web F is shown by dash-dotted line.
  • a separator 17 For dividing the fibrous web F ' in a Auf JapanstMail AS and a residual web RS a separator 17 is provided which allows a subdivision of the fibrous web F ' within the dryer assembly 1 in a residual web RS and the aufologyden, ie the functional unit 4 to be supplied AufwoodstMail AS. According to the embodiment shown in Figure 3, the subdivision takes place in front of the last in the direction of rotation of the dry belt 3 and direction of passage of the fibrous web F drying cylinder TZn, in particular between guide roller 5 and drying cylinder TZn.
  • the separating device 17 can be designed in a variety of ways. Conceivable are concepts with cutting media in the form of a fluid, such as a double-head water jet tip cutter as well as a solid, such as a cutting blade. Depending on the design and the position, the width of the threading strip as well as the position of the threading strip in the CD direction can be varied.
  • Figure 1 illustrates an advantageous arrangement of the separator 17.
  • the subdivision is carried out by separation of the fibrous web F ' on the dry belt 3.
  • the separator 17 is for this purpose the outside of the Dry band 3 assigned. If the subdivision into the guide strip AS and the residual web RS takes place before the last drying cylinder TZ, if an air knife is provided in the region of the suction box 13 on the outside 15 of the drying belt 3, the cut material is discharged through the drying belt 3.
  • FIG. 3 shows, in a view of the fibrous web F ', the arrangement of the separating device 17 and its mode of operation for subdivision into the profiling strips AS and the residual web RS.
  • the direction of movement of the fibrous web F ' is indicated by an arrow, likewise the directions of movement of the leader strip AS and the residual web RS.
  • the separating device 17 is displaceably mounted on a carrier 25 extending in machine transverse direction CD in accordance with the double arrow.
  • the width of the AufzhoustMails AS can be varied in a simply cutting device. If this is designed as a double cutter, in addition to the width, the position of the Aufzhoustographies AS in Maschinenquennchtung CD can be varied.
  • the adjustment can be made manually or automatically, for example by means of a corresponding control device 23, which activates an actuating device of the separating device 17 as a function of a variable which at least indirectly characterizes the width of the threading strip AS and / or the position in machine cross-over CD.
  • FIG. 4 shows, on the basis of a section of a drying arrangement 1 according to FIG. 1, further possibilities of arranging the separating device 17, which can alternatively be used.
  • the individual arrangements are designated 17.1 to 17.3.
  • a vertical arrangement of the drying arrangement 1 is shown with a plurality of drying cylinders TZn, TZn-1, TZn-2 and TZn-3. All drying cylinders are arranged in the vertical direction with respect to their longitudinal axes free of misalignment in the MD direction.
  • Another first possible arrangement of the separator 17.1 is by an arrangement after the expiry of the dry belt 3 from the direction of rotation of the Drying belt 3 last drying cylinder TZn characterized.
  • the fibrous web F ' to be subdivided is removed in this case with the drying belt 3 from the last drying cylinder TZn and subdivided downstream of the outflow AL into feeding strips AS and residual web RS, the division taking place before the suctionable roll 6.
  • the cut is not influenced by the drying cylinders.
  • the separating device 17.1 can also be arranged directly on the suctionable roller 6.
  • Another second possible arrangement of the separating device 17.2 is characterized by an arrangement at the beginning or in front of the drying arrangement 1, in particular the drying cylinder TZn-3 or the upstream deflection roller 5. This arrangement provides sufficient space for the arrangement of the separator 17.2.
  • the third possible arrangement of the separating device 17.3 is characterized by an arrangement within the drying arrangement 1 and upstream in the direction of rotation of the drying belt 3 last drying cylinder TZn.
  • the suction region 22 Since after transferring the Aufzhoustographies AS, the fibrous web F is driven wide and is no longer guided on the suctionable roller 6 to the removal area AB on the dry belt 3, the suction region 22, thus only for the transfer of Aufzhoustsammlungs AS and possibly the support of the leadership of the sub-strip , in particular Aufzhoustsammlungs AS ' , the residual web RS or the fibrous web F ' to catcher, in particular pulper 18 in cooperation with the device 21 is at least switched off to not affect the leadership of the fibrous web F to the functional device 4 in the normal operating state.
  • the suction region 22 is preferably designed over the extent of the roller 6 in the cross-machine direction CD.
  • FIG. 5a shows a schematically simplified representation in one Settlement illustrated an embodiment of the suction region 22 in the cross-machine direction CD with a plurality of zones 22A to 22D.
  • the individual zones can be controlled individually or in groups or jointly.
  • at least one of the zones, for example, the zone 22A is designed such that it corresponds to the width of the Auf manufacturedstMails AS. Other subdivisions are conceivable.
  • the remaining suction zones are arranged in the cross-machine direction and preferably extend over the entire width of a residual web RS theoretically to be acted upon by these.
  • the individual zones can, viewed in the cross-machine direction CD in the installation position of the roller 6, vary in terms of their extent in the width direction.
  • the zones 22A-22D, 22A1, 22A2 by means of a control device 23 as a function of a corresponding setpoint specification X, for example in the form of the respective operating mode, in particular the respective method step during the transfer indirectly characterizing size.
  • the stated embodiments for the suction region 22 also apply to the devices 16 and / or 21 for applying a negative pressure to the drying belt 3 according to FIG. 6. These can also be switched on and off. Furthermore, these can be subdivided in the cross-machine direction CD and / or along the guide path of the drying belt 3 into zones which can be controlled individually and / or in groups or jointly.
  • the control can for example also take place via a control device 23.
  • the respective control device 23 may be a control device assigned to the respective functional group. Also conceivable is a control unit centrally assigned to a functional unit or to several or to the entire machine.
  • FIG. 7 illustrates by way of example the design of the conveyor belt 9 in a divided form, in particular in a two-part design.
  • the conveyor belt is subdivided by way of example into a subarea 9A and 9B.
  • Figures 8 and 9 show further possible embodiments of the guide portion of the dry belt 3 to the suctionable roller 6. These designs are characterized by a short guide.
  • Figure 8 shows an embodiment in which the suctionable roller 6 has been moved with its axis of rotation R in the region of a vertical through the longitudinal axes L JZn of the drying cylinder TZn. This shortens the guide path for the dry belt 3 to the removal area AB.
  • this embodiment does not allow arrangement of the separating device 17 downstream of the drying cylinder TZn, but can dispense with a device 16 for supporting the leadership of the sub-strip or the fibrous web on the dry belt 3 between drain AL from the drying cylinder TZn and besaugbarer roller 6.
  • FIG. 10 shows a possibility of using a method according to the invention and a transfer device 2 according to the above Design and mode of operation in an inverted drying arrangement 1.
  • This comprises a plurality of spaced apart in series drying cylinders TZn, TZn-1 and arranged therebetween deflection rollers 5, wherein the guide rollers 5 and the downstream in the direction of rotation of the drying belt 3 and thus the direction of passage of the fibrous web F downstream besaugbare roller 6 in contrast to the previously described installation position are arranged with respect to their longitudinal axes above the longitudinal axes L JZn and L T z n -i.
  • the guidance of the partial strip or the fibrous web into the collecting device and the transfer process of the leader strip AS takes place in analogy to the procedure described in FIGS. 1 to 9.
  • the same reference numerals are used and with respect to the transfer operation, reference is made to the previous statements.
  • FIG. 11 illustrates, in a simplified schematized illustration, possible arrangements of the dry arrangement 1 according to the invention on the basis of the exemplary construction of a machine 26 for producing a material web.
  • the machine 26 comprises a forming unit 27 and press section 28 with a subsequent drying device which is subdivided into a pre-drying device 30 and a reel-up 31. Between the pre-and post-drying device 30, a smoothing device 32 and an applicator 33 for applying glue and / or coating color is arranged.
  • the drying device according to the invention can be used both in the pre-29 as well as in the after-drying device 30.
  • the arrangement in the pre-drying device 29 has the advantage that the influence of the particular single-sided application on the curl of the fibrous web 1 can be at least partially compensated. LIST OF REFERENCES

Landscapes

  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un procédé permettant le transfert d'une bande de matériau, notamment une bande de matière fibreuse (F) sous forme de bande de papier, de carton ou de papier sanitaire et domestique, d'un dispositif de séchage (1) d'une machine (26) destinée à la fabrication d'une bande de matériau de ce type, dans laquelle la bande de matériau est guidée en appui sur une bande de séchage (3) tournant en continu, alternativement, en étant en contact direct avec la surface d'une pluralité de cylindres de séchage (TZn, TZn-1, TZn-2, TZn-3) pouvant être chauffés et en passant sur des cylindres de renvoi (5) intermédiaires, jusqu'à une unité fonctionnelle (4) située en aval du dispositif de séchage (1), lors de la mise en marche ou après une panne par transfert d'un ruban de guidage (AS), procédé selon lequel, dans une étape, au moins une partie de la bande de matériau sortant du dispositif de séchage (1) ou bien la bande de matériau est guidée, sur la largeur de bande, vers un dispositif récepteur situé sous le dispositif de séchage (1). L'invention est caractérisée en ce que la bande de matériau ou ladite partie de bande, après le dernier cylindre de séchage (TZn) du dispositif de séchage (1) dans le sens de passage de la bande de matériau à travers le dispositif de séchage (1), est guidée en appui sur la bande de séchage (3) vers un dispositif récepteur décalé dans le sens vertical.
EP12790501.6A 2011-11-25 2012-11-12 Procédé permettant de transférer une bande de matériau d'un dispositif de séchage à une unité fonctionnelle située en aval et dispositif de séchage Active EP2783039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110087094 DE102011087094A1 (de) 2011-11-25 2011-11-25 Verfahren zur Überführung einer Materialbahn von einer Trockenanordnung zu einer nachgeordneten Funktionseinheit und Trockenvorrichtung
PCT/EP2012/072390 WO2013075964A1 (fr) 2011-11-25 2012-11-12 Procédé permettant de transférer une bande de matériau d'un dispositif de séchage à une unité fonctionnelle située en aval et dispositif de séchage

Publications (2)

Publication Number Publication Date
EP2783039A1 true EP2783039A1 (fr) 2014-10-01
EP2783039B1 EP2783039B1 (fr) 2015-09-16

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EP (1) EP2783039B1 (fr)
CN (1) CN103958771B (fr)
DE (1) DE102011087094A1 (fr)
WO (1) WO2013075964A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107627335B (zh) * 2014-12-25 2019-08-02 住友化学株式会社 分离器制造方法
JP6844194B2 (ja) * 2015-12-02 2021-03-17 株式会社リコー 乾燥装置、搬送システム
US10727463B2 (en) 2016-04-15 2020-07-28 Sumitomo Chemical Company, Limited Long porous separator sheet, method for producing the same, roll, and lithium-ion battery

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Publication number Priority date Publication date Assignee Title
DE102006047487A1 (de) * 2006-10-05 2008-04-10 Voith Patent Gmbh Trocknungsanordnung
DE102007018478A1 (de) * 2007-04-19 2008-10-23 Voith Patent Gmbh Vorrichtung und Verfahren zum Ablösen einer Papierbahn
DE102008000133A1 (de) * 2008-01-23 2009-07-30 Voith Patent Gmbh Trockenpartie
FI20085486L (fi) * 2008-05-22 2009-11-23 Metso Paper Inc Menetelmä ja sovitelma rainan päänviennissä kuiturainakoneen kuivatusosalla
CN201296880Y (zh) * 2008-10-16 2009-08-26 山东晨鸣纸业集团股份有限公司 造纸机烘干部干网吹扫装置
DE102009027608A1 (de) * 2009-07-10 2011-01-13 Voith Patent Gmbh Trockenpartie

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Title
See references of WO2013075964A1 *

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CN103958771B (zh) 2016-08-17
WO2013075964A1 (fr) 2013-05-30
DE102011087094A1 (de) 2013-05-29
EP2783039B1 (fr) 2015-09-16
CN103958771A (zh) 2014-07-30

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