EP0887463A2 - Dispositif pour la déshydratation d'un feutre pour papeterie - Google Patents

Dispositif pour la déshydratation d'un feutre pour papeterie Download PDF

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Publication number
EP0887463A2
EP0887463A2 EP98111947A EP98111947A EP0887463A2 EP 0887463 A2 EP0887463 A2 EP 0887463A2 EP 98111947 A EP98111947 A EP 98111947A EP 98111947 A EP98111947 A EP 98111947A EP 0887463 A2 EP0887463 A2 EP 0887463A2
Authority
EP
European Patent Office
Prior art keywords
felt
drainage device
nozzles
drainage
rinsing
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
EP98111947A
Other languages
German (de)
English (en)
Other versions
EP0887463B1 (fr
EP0887463A3 (fr
Inventor
Christian Schiel
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 Sulzer Papiertechnik 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 Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiertechnik Patent GmbH
Publication of EP0887463A2 publication Critical patent/EP0887463A2/fr
Publication of EP0887463A3 publication Critical patent/EP0887463A3/fr
Application granted granted Critical
Publication of EP0887463B1 publication Critical patent/EP0887463B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/12—Drying

Definitions

  • the invention relates to a device for dewatering Paper machine felt, in detail with the characteristics from the generic term of claim 1.
  • a paper machine felt is an endless felt belt, which in a press section of a paper machine a fibrous web supports and absorbs liquid in the press zone from the fibrous web. Outside the press zone, the felt tends to add water to the fibrous web return. However, this rewetting is not desirable.
  • the most favorable distance between neighboring blowing jets in Cross machine direction is 2 to 12 mm.
  • the cheapest distance between the nozzles from the felt surface is less than 20 mm. So that last distance can always be the same size across the width of the felt, with nozzles provided blow pipe, also called a nozzle pipe, with a sliding block or be provided with a sliding surface that is lightly pressed against the felt, so that it lies across the entire width. This pressure is natural only makes sense if the felt in the pressing area is not yet from the Opposite side is supported.
  • a so-called To use a rinsing blower device This has at least one carrier, which is connected to an air supply opening and openings, for example in the form of slots or through openings, through which, for example, air acts on the felt surface.
  • the rinsing blower device has a box-shaped ring, for example Support body, which is provided with a covering, the surface of which The active surface forms with the felt and openings in the form of blow slots Has displacer fluid supply or loading of the felt.
  • the Air supply opening which is preferably arranged laterally on the support element is then preferably through openings with those in the covering integrated blow vents coupled.
  • blow slots Preferably always one A plurality of blow slots connected to a through hole.
  • the Through opening itself can be in cross-section in the installed position be executed differently in the vertical direction.
  • the blowing air arrives then through the air supply opening, the through openings into the blow slots and blows the air under the webs between the blow slots through the porous inner layers of the felt provided in the covering Longitudinal grooves, which are also provided on the rinsing blower device and that are open to the atmosphere.
  • the covering is preferably made of wear-resistant in the form of a shoe Made of material, such as polyethylene. To realize a optimal fit of the felt band on the surface of the flushing blower these are curved in the running direction of the felt belt.
  • the drainage device according to the invention can consume energy to intensify the drainage by centrifugal force with others Drainage systems can be combined. For example it is conceivable, further parts of the liquid from the felt band, which are not through Centrifugal force have been thrown off via wipers and / or Devices for generating a suction effect, for example one on the corresponding surface of the felt tape adjacent suction tube or of a corresponding foil can be realized.
  • the concrete constructive Design or combination with other drainage systems is at the discretion of the professional and usually depends on the Operational requirements.
  • 1 is a felt running in the direction of arrow 7, which has an outer guide roller 2 loops around, which is rotatably mounted on end pins 2 '.
  • the dash-dotted line 1 ' shows schematically that the felt is an endless belt.
  • the path of the felt in area 1 ' can be selected as desired, and in this area there are also contain other elements influencing the felt, e.g. in Wet presses are common.
  • From the periphery of the felt 1 in the area of the roller 2 thrown water is in a drip pan 3, which over the entire width of the felt extends, collected and through a side Drain 4 led out of the felt loop.
  • Kurt before the casserole of the felt 1 on the roller 2 is from a blow pipe 5 with a variety of over Wide distributed nozzles 6 displacer fluid against the inside of the felt blown.
  • a needle spray device for keeping clean is also preferred the inside 1a of the felt 1 is provided.
  • the needle spray device is used as a traversing device Needle spray tube 51 executed.
  • the needle spray tube 51 which is usually mounted on a frame, by adjusting the Frame across the felt width with respect to its position relative to the felt 1 or Inside 1a is adjustable adjustable transversely to the felt running direction.
  • the traversing needle spray tube 51 is the nozzle 6 in the felt running direction 7 subordinate.
  • traversing needle spray tube 51 in the felt belt running direction 7 between the Point of action of the nozzles 6 on the inside 1a of the felt 1 and Arrange run-up point of the felt on the outer guide roller 2.
  • a traversing needle spray tube 51 is also conceivable, wherein the adjustment frequency according to the application requirements, i.e. especially free depending on the speed of the felt is preset or adjustable.
  • Another possibility is to provide a plurality of Needle spray devices.
  • the felt 1 consisting of carrier layer 8 and nonwoven layer 9 is arranged above the blow pipe 5 with nozzles 6.
  • the felt fluid By the impulse of the against The felt fluid blown into the felt underside the water in the Mesh up a fabric serving as a support layer 8 pushed away and dodges to the side so that the surface of the Water level 10 in the carrier layer 8 is wavy. If these furrows Water surface reaches the curved area 12 of the felt web 1, draw them, as can be seen in Figure 3, on a larger radius R with a higher one Accelerated water ribs 13 further water from the Furrows after that due to the smaller radius r a smaller one Are subjected to centrifugal acceleration. That concentrated in the ribs 13 Water is thrown off.
  • the blow pipe 5 can be used over the entire width, as in FIG. 4 shown on the felt. This is the distance between the openings the nozzles 6 are the same size everywhere from the surface of the felt 1.
  • FIG. 5 the tube 5 is attached with the slide shoe 14 attached Sliding surface 15 slightly pressed into the felt 1, with the same result that the distance of the openings of the nozzles 6 from the underside of felt 1 over the width is the same.
  • Fig. 6 shows a press section of a paper machine in the in a preferred embodiment, a drainage device for Water drainage from the inside of a circulating felt belt Centrifugal force at which a displacer fluid against the curved area the felt is blown, is used.
  • FIG. 6 shows two press rolls 100, 102, one Form press zone 104.
  • Each of the press rolls is rotated by one endless felt belt 106, 108 for example a strong double-sided felt belt, surround.
  • liquid, especially water passes from a fibrous web in the felt belt.
  • a felt tape is on a carrier layer interspersed with openings and cavities is a fine one Nonwoven needled.
  • Each of the felt belts 106, 108 includes a drainage device 110, 112 with nozzles 114, 116 for applying the displacement fluid, and one Collecting pan 118, 120 for receiving the spun off water.
  • the Paper web runs in the direction of the arrow and is shown Transfer take-off roller 122 to the press section. After the press zone 104 the paper web follows the felt 108 and arrives at a belt 123. This leads the paper web to further press stations or to a dryer section.
  • the felt tape can be drained more than before.
  • the drainage devices 110, 112 instead of directly to the Press rolls 100, 102 arranged means for discharging liquid use or in combination with a previously unachieved To achieve drainage of the felt tape.
  • FIG. 7 illustrates using a narrow section from a Press section another embodiment of a dewatering device for water removal from the inside of a circulating felt 52 Centrifugal force at which a displacement medium in front of the curved area or fluid is blown against the felt 52.
  • the felt 52 is shown in the Case and others passed over the guide rollers 57.1 and 57.2 7 designated.
  • a nozzle tube 58 is provided which covers the surface in the Base fabric of the felt 52 water in the invention Way waves.
  • the nozzle tube 58 is in the direction 7 of the felt 52 in front of the Run-up point of the felt 52 arranged on the guide roller 57.1. That through that Nozzle tube 58 has rippled water in the base fabric of its surface
  • felt 52 is discharged in two ways.
  • a first part is under the influence of centrifugal force in the wrap area of the Felt 52 with the guide roller 57.1, here designated U, at the points from Felt 52 spun off, the spun off part is designated 59, and another second part is through a stripping device, for example in the form of a substantially the entire width of the felt belt extending scraper 60 in the area of the drain of Felt tape 52 stripped from the guide roller 57.1, here designated 61.
  • the Water thrown off at points 59 is at a baffle 70 deflected and via a guide plate 62 into a gutter 63, which preferably has a lateral outlet 64. That in the area the outlet of the felt tape 52 stripped water is also on Baffle 62 derived in the gutter 63.
  • the groove 63, the scraper 60, the baffle 70 and the baffle 62 are preferably on one common cross member 65 attached, which is also preferably extends over the entire width of the felt 52.
  • the assignment of the Cross member 65 and the attached gutter 63, the baffle 70, the guide plate 62 and the scraper 60 to the felt 52 takes place in Felt running direction 7 such that the water is also in this direction, i.e. in Direction of felt is removed.
  • a pipe suction device for cleaning the felt 52 Bar for example in the form of a scraper bar 53, which Dirt is wiped off on the felt outside 71 in the direction of arrow 54. This is through a moistening spray tube 55 or a so-called “duo-cleaner” loosened or loosened.
  • the moistening spray tube 55 is shown in Felt running direction 7 arranged in front of the scraper 53.
  • the scraper 53 is preferably attached to a height adjustable cross member 56 which also extends essentially across the width of the felt.
  • a Cleaning spray tube 51 with multiple jets across the width cleans the Inside of the felt.
  • FIG. 8 illustrates a section of a press section a further embodiment of a drainage device according to the invention.
  • the felt is labeled 201 here. This is, among other things, about the Guide rollers 202.1 and 202.2 out.
  • the felt running direction is designated 7.
  • a rinsing blower device is in the case shown 203 provided.
  • This includes a preferably box-shaped support body 214, which with a wear-resistant element, preferably a shoe made of polyethylene 204, is coupled or coated, which is essentially in the installed position extends into the area of the inside 201a of the felt 201.
  • the purge blower device 203 further comprises one, preferably arranged laterally, Air supply opening 215 through which air with a pressure of about 1 to 5 kPa is blown in.
  • the rinsing blower device performs the same function like those labeled 5 in Figures 1 to 6 and 58 in Figure 7 Blowpipes, but at a higher intensity level.
  • a first part is due to the centrifugal force at 205 thrown off water from the felt 201 and a second part in one Area 206, which is attached to the outlet of the felt 201 from the guide roller 202.2 connects, i.e. lies outside of the looping area at which The front edge of a bar 207 scraped off.
  • the bar 207 is in terms of their effective area 74 in this way compared to the felt 201, in particular the Inside 201a of the felt 201, arranged that this further one so-called Foilzwickel 208 between the back 80 of the bar 207 and the felt band 201, in which water from the felt 201 due to the Vacuum is sucked and derived via the bar 209 in the area 210 and is guided in a gutter 211.
  • the gutter 211 has preferably also has a lateral outlet 212 and is at one Cross member 213 attached.
  • Needle spray tube 51 takes on a cleaning function.
  • FIGS. 9 to 11 use one according to the invention Rinsing blower device 203 shown in detail.
  • a preferably box-shaped carrier 214 which with a polyethylene covering 205, preferably in the form of a Polyethylene shoe, coupled or coated is the polyethylene shoe 205 forms the surface 222 of the rinsing blower device 203, which is preferably up to the area of the felt surface, in particular the Inside on the felt surface, extends or is contacted with it.
  • the effective surface 222 and the realization of a optimal contact of the felt tape on the surface 222 of the Polyethylene shoe is curved in the direction of the felt. The felt can then due to its longitudinal tension directly on the surface 222 concerns.
  • the coupling between box girder 214 and Covering 205 takes place, for example, via clamping devices 216.
  • the blown air passes through the air supply opening 215 via the - in the installed position - bottom of the Box girder 214 incorporated openings 217 and preferably over as Blind holes 218 formed through openings in the polyethylene covering 205 in blow slots 219, which extend from these to the area of Extend surface 222 of covering 205.
  • the execution of the Blow slots 219 and the connection between the box girder 214 in particular the air supply opening 215 and the blow slots 219 a variety of ways.
  • the concrete constructive execution lies in At the discretion of the specialist and is carried out according to the application requirement. In the simplest case, the connections are through openings and Slots realized.
  • a plurality of blow slots 219 are included a through opening 217 or blind hole 218.
  • FIG. 10 illustrates a section from a view III-III corresponding to Figure 9. From this it can be seen that the over the Air supply opening 215 conveyed air, which passes through the through openings 217 and the blind holes 218 and the blow slots 219 comes under the Web 220 through the porous inner layers of the felt 201 in longitudinal grooves 221 reaches the atmosphere, which are open to the atmosphere.
  • the slots 219 preferably have a semicircular cross section corresponding to the view shown in Fig. 9, and a rectangular Cross section corresponding to the view in FIG. 11.
  • the specifically selected combination of the inventive Drainage device for intensifying drainage with others Drainage facilities, e.g. Scraper or scraper and the use of negative pressure depends on the requirements of the individual case.
  • the direction of rotation 5 of the filter in FIG. 11 is either parallel to the slots 219, 221 or slightly inclined as indicated by arrow 7 '.
  • the inclination of the The felt running direction to the slit direction is preferably slight, with an angle of less than 2 °.
  • This tendency is achieved either by the entire flushing device 203 tilted from the perpendicular position of its axis 223 to the felt running direction becomes, as shown, or the axis 223 becomes right-angled to Leave the felt running and the slots 219 and 221 become Felt running direction 7 arranged inclined.

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  • Paper (AREA)
EP98111947A 1997-06-30 1998-06-29 Dispositif pour la déshydratation d'un feutre pour papeterie Expired - Lifetime EP0887463B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19727522A DE19727522C2 (de) 1997-06-30 1997-06-30 Einrichtung zur Entwässerung eines Papiermaschinenfilzes
DE19727522 1997-06-30

Publications (3)

Publication Number Publication Date
EP0887463A2 true EP0887463A2 (fr) 1998-12-30
EP0887463A3 EP0887463A3 (fr) 1999-11-17
EP0887463B1 EP0887463B1 (fr) 2004-02-11

Family

ID=7833926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111947A Expired - Lifetime EP0887463B1 (fr) 1997-06-30 1998-06-29 Dispositif pour la déshydratation d'un feutre pour papeterie

Country Status (3)

Country Link
US (1) US6153056A (fr)
EP (1) EP0887463B1 (fr)
DE (2) DE19727522C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179631A1 (fr) * 2000-08-11 2002-02-13 Voith Paper Patent GmbH Dispositif de nettoyage et/ou de conditionnement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946985A1 (de) * 1999-09-30 2001-04-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Entwässerung einer Faserstoffbahn
EP1341960A1 (fr) 2000-12-13 2003-09-10 Metso Paper Karlstad AB Dispositif et procede d'essorage de tissus
US7303655B2 (en) * 2004-03-19 2007-12-04 Metso Paper Karlstad Aktiebolag (Ab) Apparatus for conditioning a fabric in a papermaking machine and associated method
KR20080051961A (ko) * 2006-12-07 2008-06-11 한국전자통신연구원 플렉시블 기판의 세정 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347740A (en) * 1963-10-14 1967-10-17 Rice Barton Corp Method and apparatus for purging travelling felts
GB2055409A (en) * 1979-07-30 1981-03-04 Huyck Corp Positive pressure felt dewatering and cleaning device and method
US4698134A (en) * 1983-11-25 1987-10-06 Consolidated-Bathurst, Inc. Method for cleaning papermaking fabrics

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198693A (en) * 1964-08-21 1965-08-03 Beloit Corp Scavenging means for grooved press rolls
US3652389A (en) * 1969-03-14 1972-03-28 Appleton Mills Adjustable fabric for use as a papermaking felt with zig-zag patterned cross machine yarns
US4154648A (en) * 1974-03-08 1979-05-15 Nordiska Maskinfilt Aktiebolaget Method for separating a paper web from a forming fabric in a paper-making machine
US4116762A (en) * 1977-01-28 1978-09-26 Gardiner Frank J Porous felt web conditioning system
US5958190A (en) * 1997-06-25 1999-09-28 Beloit Technologies, Inc. Cleaning apparatus for cleaning a forming wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347740A (en) * 1963-10-14 1967-10-17 Rice Barton Corp Method and apparatus for purging travelling felts
GB2055409A (en) * 1979-07-30 1981-03-04 Huyck Corp Positive pressure felt dewatering and cleaning device and method
US4698134A (en) * 1983-11-25 1987-10-06 Consolidated-Bathurst, Inc. Method for cleaning papermaking fabrics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179631A1 (fr) * 2000-08-11 2002-02-13 Voith Paper Patent GmbH Dispositif de nettoyage et/ou de conditionnement

Also Published As

Publication number Publication date
US6153056A (en) 2000-11-28
DE59810731D1 (de) 2004-03-18
DE19727522A1 (de) 1999-01-28
EP0887463B1 (fr) 2004-02-11
EP0887463A3 (fr) 1999-11-17
DE19727522C2 (de) 1999-05-27

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