EP1659215A1 - Dispositif pour nettoyer une toile de machine à papier - Google Patents

Dispositif pour nettoyer une toile de machine à papier Download PDF

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Publication number
EP1659215A1
EP1659215A1 EP05109325A EP05109325A EP1659215A1 EP 1659215 A1 EP1659215 A1 EP 1659215A1 EP 05109325 A EP05109325 A EP 05109325A EP 05109325 A EP05109325 A EP 05109325A EP 1659215 A1 EP1659215 A1 EP 1659215A1
Authority
EP
European Patent Office
Prior art keywords
contact surface
screen
contact
cleaning
sieve
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.)
Withdrawn
Application number
EP05109325A
Other languages
German (de)
English (en)
Inventor
Jiew Poh Liew
Antony Dr. Morton
Dwight Payne
Craig Valentine
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
Voith Fabrics 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, Voith Fabrics Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1659215A1 publication Critical patent/EP1659215A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/04—Pitch control

Definitions

  • the invention relates to a device for cleaning a papermaking fabric, in particular a drying fabric having adhesive contaminants, according to the preamble of patent claim 1.
  • a device of the type mentioned above is known for example from WO 97/02380.
  • This device has for cleaning a drying wire to a device for removing the impurities from the dryer fabric, are applied to the water jet under high pressure transverse to the direction of the dryer fabric on the latter. With the help of these high pressure water jets impurities should be removed from the paper machine screen.
  • a disadvantage is that the high-pressure water jets accelerate the degradation of the screen and thus reduce the life of the paper machine screen.
  • such a cleaning of the paper machine screen can not be performed during the operation of the paper machine because of the increased moistening of the screen, ie the normal operation of the paper machine is to be interrupted for cleaning the paper machine screen. This results in increased downtime.
  • the invention has for its object to provide a device of the type mentioned, which is more economical to handle.
  • the device for removing the contaminants from the screen has a contact surface which comes into contact with at least one outer side of the screen and which is designed and arranged such that the contaminants can be transferred from the screen to the contact surface.
  • a flat or at least even linear contact between the at least one outer side of the screen and the contact surface allows detachment of the contaminants from the screen and a transfer of the same to the contact surface.
  • the contact surface has an effective surface which is larger than that of the screen, wherein the contact surface preferably in the form of a fabric having a fibrous surface in which the increase in effective surface area is brought about by a high aspect ratio of the fibers.
  • the contact surface is made of a material which is softer than the material from which the sieve is made.
  • the contact area is softer than the screen, thereby improving the removal of contaminants from the screen and adhesion of the detached contaminants to the contact area.
  • the contact surface is in the form of a revolving belt or in the form of a rotatable roller or drum.
  • the revolving belt and the rotatable roller or drum may be provided with their own drive or moved together with the paper machine screen.
  • the contact surface according to the invention can also be sacrificial surface.
  • the contact surface is chemically treated to facilitate the process of removing the impurities and transferring them from the papermaking fabric to the contact surface.
  • the contact surface is assigned a cleaning device and preferably a drying device downstream of the cleaning device in the direction of movement of the contact surface.
  • Cleaning device and drying devices are used to detach the impurities transferred from the paper machine screen from the contact surface and to dispose of a disposal.
  • the service life of the contact surface according to the invention is increased.
  • the contact surface is thus longer able to remove impurities from the papermaking fabric, whereby the cost-effectiveness of the use of the contact surface according to the invention is further improved.
  • the temperature in the contact region between the least one outer side of the screen and the contact surface is at least 50 ° C, preferably at least 80 ° C.
  • Such temperatures improve the transfer, in particular, of adhesive contaminants from the papermachine fabric to the contact surface and therefore contribute to a more economical handling of the entire apparatus.
  • the device for removing the contaminants from the screen is formed such that the screen and the contact surface are preferably pressed against one another in their contact region in a nip.
  • the additional application of pressure between the paper machine wire and the contact surface can further improve the efficiency of the transfer of impurities to the contact surface, wherein a particularly economical operation of the device at elevated temperature and at the same time increased contact pressure between the wire and contact surface is possible.
  • a device 1 for cleaning a paper machine screen 2 is shown schematically in a side view in various embodiments.
  • the paper machine screen 2 is meandered around rollers or drums 3 of large diameter, of which, as shown in Figs. 1 and 2, three upper rollers side by side and spaced from each other and two lower rollers, about the space between two upper rollers assigned, are arranged. Further, the paper machine wire 2 passes around a plurality of small-diameter rolls 4 which are disposed substantially above the large-diameter rolls 3. All rollers 3, 4 are rotatably mounted about their respective axis of rotation 5.
  • the papermaking fabric 2 is guided in such a meandering manner around the large-diameter rolls 4, once the one outer side 6, namely the top, and once the other outside 7, namely the bottom, with the lateral surface a roller comes into contact.
  • the respective axes of rotation 5 are held stationary. Only one of the rollers 4, namely the roller 10, with a small diameter, for example, for clamping the Paper machine screen 2 in the radial direction and pushed back and locked in the desired position. It is clear that at least one of the rollers 3, 4 is driven so that the large-diameter right upper roll 3 rotates in the direction of arrow A, for example, and the paper machine wire 2 is conveyed in the direction of arrow B accordingly.
  • the device 1 serves to clean the paper machine screen 2, but in particular not exclusively a drying contaminant 11 having drying fabric.
  • the papermaking screen may also be, for example, a press felt.
  • the contaminants 11 are preferably only adhesive contaminants, i. sticky or sticky contaminants. It is clear that the contaminant 11 ultimately also from other, i. non-adhesive, components can exist.
  • the impurities 11 are indicated in Fig. 1 only on the one outer side 6, namely the top of the paper machine screen 2 and then, for better clarity, only in the area of the device 1.
  • the device 1 has a device 12 for removing the contaminants 11 from the papermachine fabric 2, hereafter referred to as a sieve.
  • the device 12 has a contact surface 13 which is in contact with at least one outer side 6, 7 of the wire 2 and which is designed and arranged in such a way that the contaminants 11 can be transferred from the wire 2 to the contact surface 13.
  • the contact surface 13 has an effective surface 14 which is larger than that of the screen 2.
  • the contact surface 13 is in the form of a fabric having a fibrous surface in which the increase in effective surface area is brought about by a high aspect ratio of the fibers.
  • the contact surface 13 is formed in the form of a circumferential band 15.
  • the contact surface 13 in the form of a rotatable roller 16 or in the form of a rotatable drum.
  • the lateral surface of the rotatable roller 16 may be formed as a contact surface 13 and releasably connected to the actual roller body.
  • the respective contact surface 13 is assigned a cleaning device 17 and a drying device 20 arranged downstream of the cleaning device 17 in the direction of movement of the contact surface 13.
  • cleaning device and drying device can also be omitted.
  • the temperature in the contact region between the at least one outer side 6 of the wire 2 and the contact surface 13 is at least 50 ° C, preferably at least 80 ° C.
  • the device 12 is preferably additionally designed such that the screen 2 and the contact surface 13 are preferably pressed against each other in their contact region in a nip 21.
  • a nip 21 is formed by the slight distance between the rotatable roller 16 and a counter-roller 22. It is also possible to provide a nip in the embodiment shown in FIG. 1 and to press the wire and contact surface against each other. In this case are appropriate rollers / counter-rollers as well as in the embodiment of FIG. 2 in the contact area between the screen and contact surface provided.
  • the cleaning device 17 serves, as indicated in FIGS. 1 and 2, to remove impurities 11 from the contact surface 13, for example in the direction of the arrow C, and to supply them to a collecting container not shown in greater detail.
  • the downstream drying device 20 is used to dry the water jet contacted by the surface 14 of the contact surface 13.
  • the drying device 20 therefore prevents the papermachine fabric from being exposed to further moisture by contact with the contact surface.
  • the enlarged effective surface 14 of the contact surface 13 provides receiving locations for the transmission of the adhesive contaminants 11. It can be arranged on the papermaking fabric 2 and a plurality of devices 1. At least one of these, contact surface devices is provided at the beginning of the dryer section, preferably in the region of the first two groups. The contact surface is arranged, for example, directly where the papermaking wire leaves the heated cylinder at the beginning of the return.
  • the invention is particularly suitable for paper grades containing high levels of tacky contaminants, such as cardboard and wrapping paper, newsprint and an ink removal paper, also called deinking paper.
  • the wire 2 runs in the direction of the arrows A, B around the large diameter rollers 3 and the small diameter rollers 4. It is clear that the sieve 2 is an endless sieve.
  • the contact surface 13 runs, for example in the form of an endless belt at least partially parallel and in the direction of arrow B of the screen 2.
  • the contact surface 13 is at least in the contact area between the screen and contact surface closely on the one outer side 6, in Fig. 1, this is the top of the screen 2, on.
  • the impurities 11 provided in the region of the outside 6 of the screen in particular adhesive or sticky impurities, can be transferred from the screen to the contact surface due to the significantly higher effective surface area of the contact surface compared to that of the screen.
  • the individual impurities 11 are therefore located after the contact area on the contact surface and not on the screen.
  • the adhering to the contact surface 13 impurities 11 can be removed by means of a cleaning device 17 from the contact surface, as indicated by the arrow C. If necessary, the cleaning device 17 may be arranged downstream of a drying device 20, so that a substantially dry contact surface can again come into contact with the wire.
  • the contact surface is worn or worn, it can be replaced by a new contact surface.

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  • Paper (AREA)
EP05109325A 2004-11-22 2005-10-07 Dispositif pour nettoyer une toile de machine à papier Withdrawn EP1659215A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004056321A DE102004056321A1 (de) 2004-11-22 2004-11-22 Vorrichtung zum Reinigen eines Papiermaschinensiebes

Publications (1)

Publication Number Publication Date
EP1659215A1 true EP1659215A1 (fr) 2006-05-24

Family

ID=35385655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05109325A Withdrawn EP1659215A1 (fr) 2004-11-22 2005-10-07 Dispositif pour nettoyer une toile de machine à papier

Country Status (3)

Country Link
US (1) US7494569B2 (fr)
EP (1) EP1659215A1 (fr)
DE (1) DE102004056321A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4711316B2 (ja) * 2008-07-23 2011-06-29 株式会社淀川芙蓉 抄紙機ドライヤ用カンバスのクリーニング装置
HU3938U (en) 2010-04-20 2011-05-30 Peter Farkas Apparatus for cleaning dryer fabrics

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556453A (en) * 1983-08-06 1985-12-03 J. M. Voith Gmbh Apparatus for cleaning paper making machine screen belts
EP0343711A2 (fr) * 1988-05-23 1989-11-29 Cartiera Dell'ania Spa Dispositif pour le nettoyage des toiles ou des feutres dans les machines à papier
JPH01321990A (ja) * 1988-06-20 1989-12-27 Aikawa Tekko Kk 製紙用キャンバス等における洗浄装置
DE4105674A1 (de) * 1991-02-22 1992-08-27 Bruderhaus Maschf Neue Walzenreinigungsvorrichtung
WO1997002380A1 (fr) 1995-07-06 1997-01-23 Thermo Fibertek Inc. Appareil et procede de nettoyage pour toile secheuse
EP0936304A2 (fr) * 1998-02-14 1999-08-18 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif de nettoyage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1637169A (en) * 1925-06-13 1927-07-26 John H Alexander Wire-cleaning apparatus
US1846646A (en) * 1929-04-04 1932-02-23 Eugene H Lansing Felt cleaning apparatus
US1880687A (en) * 1930-12-29 1932-10-04 Beloit Iron Works Press felt suction roll
SE8008135L (sv) * 1980-11-20 1982-05-21 Wennerbergs Borstfabrik Ab Forfarande och anordning for rengoring av maskinbeklednad inom cellulosa-, board- och pappersindustrin
JP3495508B2 (ja) * 1996-04-26 2004-02-09 日本フイルコン株式会社 工業用ベルトのクリーニング方法及びそれに使用する工業用ベルトのクリーニングベルト
GB9622363D0 (en) * 1996-10-28 1997-01-08 Celltech Therapeutics Ltd Chemical compounds
US7300551B2 (en) * 2004-03-03 2007-11-27 Nalco Company Paper machine belt conditioning system, apparatus and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556453A (en) * 1983-08-06 1985-12-03 J. M. Voith Gmbh Apparatus for cleaning paper making machine screen belts
EP0343711A2 (fr) * 1988-05-23 1989-11-29 Cartiera Dell'ania Spa Dispositif pour le nettoyage des toiles ou des feutres dans les machines à papier
JPH01321990A (ja) * 1988-06-20 1989-12-27 Aikawa Tekko Kk 製紙用キャンバス等における洗浄装置
DE4105674A1 (de) * 1991-02-22 1992-08-27 Bruderhaus Maschf Neue Walzenreinigungsvorrichtung
WO1997002380A1 (fr) 1995-07-06 1997-01-23 Thermo Fibertek Inc. Appareil et procede de nettoyage pour toile secheuse
EP0936304A2 (fr) * 1998-02-14 1999-08-18 Voith Sulzer Papiertechnik Patent GmbH Procédé et dispositif de nettoyage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 123 (C - 0698) 8 March 1990 (1990-03-08) *

Also Published As

Publication number Publication date
US20060219377A1 (en) 2006-10-05
US7494569B2 (en) 2009-02-24
DE102004056321A1 (de) 2006-05-24

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