EP1669492A1 - Dispositif de nettoyage - Google Patents

Dispositif de nettoyage Download PDF

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Publication number
EP1669492A1
EP1669492A1 EP05109337A EP05109337A EP1669492A1 EP 1669492 A1 EP1669492 A1 EP 1669492A1 EP 05109337 A EP05109337 A EP 05109337A EP 05109337 A EP05109337 A EP 05109337A EP 1669492 A1 EP1669492 A1 EP 1669492A1
Authority
EP
European Patent Office
Prior art keywords
fluid
clothing
cleaning
cleaning nozzle
fabric
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Withdrawn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
EP05109337A
Other languages
German (de)
English (en)
Inventor
Wolfgang Ulfert
Ralf Pfifferling
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 Paper 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 Paper Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1669492A1 publication Critical patent/EP1669492A1/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Withdrawn legal-status Critical Current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
    • D21F1/325—Washing wire-cloths or felts with reciprocating devices

Definitions

  • the invention relates to a device for cleaning a circumferential covering of a machine for producing and / or further processing a material web, in particular a fibrous web. Furthermore, the invention relates to a method of such a covering.
  • Fabrics of a machine for producing and / or further processing a material web are essentially cleaned by a pressurized fluid.
  • the pressure range is sufficient for each type of clothing up to 500bar.
  • a cleaning takes place here by machine-wide spray pipes or by traversing cleaning heads.
  • the fluid is directed as a stationary or rotating free jet on the fabric to be cleaned.
  • the incident on the surface of the fabric beam penetrates partially into the fabric, but is for the most part reflected from the surface of the fabric. In the case of a press felt, for example, this is because the outer nonwoven layer is difficult to penetrate with a free jet.
  • Coverings in particular those which are used in the press section, are increasingly irreversibly compacted, for example by pressurization, ie this has the effect, for example with a press felt, that the ability to absorb and dispense water - that is to say the elasticity - decreases with increasing running time.
  • the object is achieved by a device for cleaning a revolving string.
  • the cleaning device in this case has at least one cleaning nozzle, from which emerges a fluid which interacts with the clothing.
  • the cleaning nozzle is arranged essentially in direct contact with the clothing, so that the fluid is essentially pressed into the clothing.
  • the fluid-especially in the case of clothing in the press section -not only cleans the surface of the clothing, but also the depth of the clothing.
  • deeper soiling can be removed, which would not have been removed with the methods known from the prior art.
  • the fabric is puffed or "inflated" by the depressed water jet. This happens because, due to the propagation resistance which the fluid has to overcome in the clothing, a hydrostatic pressure builds up in the environment of the fluid pressed into the clothing, as a result of which the clothing is locally expanded.
  • the clothing here receives a conditioning that significantly to the Elasticity of the fabric affects, as counteracted by the "inflation" of the compaction.
  • the at least one cleaning nozzle is traversable traversable in the cross-machine direction. This makes it possible to successively clean and condition different sections of the clothing in the cross-machine direction.
  • a further embodiment of the invention provides that a plurality of cleaning nozzles are arranged, which are arranged one behind the other in the cross-machine direction.
  • the clothing in the cross machine direction is conditioned differently in sections by the fluid.
  • the cleaning and / or conditioning can be influenced by different exposure time of the fluid to a point and / or by different fluid flow and / or fluid pressure.
  • the fluid contains a liquid and / or a gas.
  • purified process water it is advantageous to use purified process water as the fluid.
  • the cleaning nozzle used here has a diameter in the range of 0.3 mm to 5.0 mm, preferably from 0.8 mm to 4 mm, particularly preferably from 0.8 mm to 2 mm.
  • a wear-resistant material such as a ceramic material such as an oxide such as alumina or a carbide such as silicon carbide.
  • the cleaning nozzle by means of yielding force in direct contact with the fabric.
  • the yielding force effect can be effected, for example, by means of spring force and / or pneumatic force.
  • the force effect is adjusted regulated, i.
  • the cleaning nozzle is advantageously always pressed only with the force on the fabric, which is necessary to maintain the direct contact between the cleaning nozzle and the fabric upright.
  • the fluid is removed from the fabric under the action of a negative pressure.
  • At least one vacuum device may be provided, which is arranged on the cleaning nozzle side facing away from the fabric or on the cleaning nozzle side facing the fabric a vacuum device.
  • negative pressure devices can also be provided on both sides.
  • Possible embodiments of the vacuum device can, for example, be a vacuum cleaner, suction box and the like.
  • the device according to the invention can be used for cleaning and conditioning of clothing such as, for example, screening or felts, preferably press felts.
  • a fluid exits from at least one cleaning nozzle.
  • the fluid is pressed into the clothing substantially without the formation of a free jet, so that a substantial proportion of the fluid penetrates into the clothing.
  • FIG. 1 shows a press section 1 of a paper machine in sections.
  • the press section 1 has a shoe press unit 4 formed by a shoe press roll 2 and a counter roll 3, through which a paper web 5 is guided in sandwich between an upper press felt 6 and a lower press felt 7.
  • the upper press felt 6 is deflected over a series of deflection rollers 8 to 13.
  • the lower press felt 7 is deflected over a series of deflection rollers 14 to 18.
  • a cleaning device 20 is arranged in front of a suction device 21 in the running direction 19 of the upper press felt 6.
  • the cleaning device 21 acts with a fluid on the side 23 of the upper press felt 6, which comes into contact with the paper web 5.
  • the cleaning device 21 is designed to be traversable in the cross-machine direction.
  • the suction device 21 acts on the side 24 of the upper press felt 6, which faces away from the cleaning device.
  • a further suction device 22 is provided, which acts on the side 23 of the upper press felt 6.
  • FIG. 2 shows a detailed view of the cleaning device 20 of FIG. 1 according to the invention.
  • the cleaning device 20 has a cleaning nozzle 25 from which emerges a fluid 26 which interacts with the upper press felt 6. As can be seen from FIG. 2, the cleaning nozzle 25 is arranged in direct contact with the upper press felt 6, so that the fluid 26 is pressed into the upper press felt 6.
  • the cleaning nozzle 25 by means of yielding force in direct contact with the press felt 6.
  • the force effect can be exerted, for example.
  • the force action of the cleaning nozzle 25 is adjusted to the press felt 6, i. the cleaning nozzle 25 is always pressed with the force on the press felt 6, which is necessary to maintain the direct contact between the cleaning nozzle 25 and the press felt 6.
  • the upper press felt 6 is formed in the present embodiment by a base fabric 28 and a top nonwoven layer 29 and a bottom nonwoven layer 30.
  • the fluid 26 is purified process water.
  • the fluid 26 is acted upon by a pressure of 25 bar and the cleaning nozzle 25 has a diameter of 0.8 mm.
  • the temperature of the fluid 26 is 45 ° C. It should also be noted that the pressurization is made dependent on the felt design to obtain optimum cleaning performance.
  • the coming into contact with the upper press felt 6 end portion 27 of the cleaning nozzle 25 is rounded to minimize the wear of the press felt 6.
  • the end section 27 of the cleaning nozzle 25 that comes into contact with the press felt 6 has a wear-resistant material, such as, for example, ceramic aluminum oxide.
  • the end section 27 is coated with the wear-resistant material or is formed as a solid material from the wear-resistant material.
  • the press felt 6 is purged or "pumped" by the depressed fluid 26. This is because, due to the propagation resistance that the fluid 26 has to overcome in the press felt 6, a hydrostatic pressure builds up in the vicinity of the fluid 26 pressed into the press felt 6, whereby the press felt 6 is locally expanded.
  • the press felt 6 receives in this case a conditioning which has a significant effect on the elasticity of the press felt 6, since counteracted by the "inflation" of the compaction.
  • the vacuum device 21 By the vacuum device 21, the fluid 26 and the dissolved contaminants 31 is removed from the press felt 6.
EP05109337A 2004-12-08 2005-10-07 Dispositif de nettoyage Withdrawn EP1669492A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410059030 DE102004059030A1 (de) 2004-12-08 2004-12-08 Reinigungsvorrichtung

Publications (1)

Publication Number Publication Date
EP1669492A1 true EP1669492A1 (fr) 2006-06-14

Family

ID=35395834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05109337A Withdrawn EP1669492A1 (fr) 2004-12-08 2005-10-07 Dispositif de nettoyage

Country Status (2)

Country Link
EP (1) EP1669492A1 (fr)
DE (1) DE102004059030A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1553274A (en) * 1922-06-05 1925-09-08 Vickery Ltd Machine for cleaning transporting bands
DE500126C (de) * 1925-11-16 1930-06-18 Frederick William Vickery Verfahren und Vorrichtung zum Reinigen des Filzes von Papiermaschinen
FR2569734A1 (fr) * 1983-05-16 1986-03-07 Poulsen Ole Appareil et procede de traitement d'un feutre egoutteur de machine a papier
US5381580A (en) * 1990-06-06 1995-01-17 J. M. Voith Gmbh Device for cleaning a paper machine wire web
US5900117A (en) * 1995-01-05 1999-05-04 Scapa Group Plc Apparatus and method for cleaning papermachine clothing
EP1464754A2 (fr) * 2003-04-04 2004-10-06 Voith Paper Patent GmbH Appareil de nettoyage d'une bande en mouvement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1553274A (en) * 1922-06-05 1925-09-08 Vickery Ltd Machine for cleaning transporting bands
DE500126C (de) * 1925-11-16 1930-06-18 Frederick William Vickery Verfahren und Vorrichtung zum Reinigen des Filzes von Papiermaschinen
FR2569734A1 (fr) * 1983-05-16 1986-03-07 Poulsen Ole Appareil et procede de traitement d'un feutre egoutteur de machine a papier
US5381580A (en) * 1990-06-06 1995-01-17 J. M. Voith Gmbh Device for cleaning a paper machine wire web
US5900117A (en) * 1995-01-05 1999-05-04 Scapa Group Plc Apparatus and method for cleaning papermachine clothing
EP1464754A2 (fr) * 2003-04-04 2004-10-06 Voith Paper Patent GmbH Appareil de nettoyage d'une bande en mouvement

Also Published As

Publication number Publication date
DE102004059030A1 (de) 2006-06-14

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