EP3406792B1 - Dispositif destiné à étanchéifier l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme de la presse-pâte - Google Patents

Dispositif destiné à étanchéifier l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme de la presse-pâte Download PDF

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Publication number
EP3406792B1
EP3406792B1 EP18163874.3A EP18163874A EP3406792B1 EP 3406792 B1 EP3406792 B1 EP 3406792B1 EP 18163874 A EP18163874 A EP 18163874A EP 3406792 B1 EP3406792 B1 EP 3406792B1
Authority
EP
European Patent Office
Prior art keywords
filter press
sealing
area
strip
sealing strip
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.)
Active
Application number
EP18163874.3A
Other languages
German (de)
English (en)
Other versions
EP3406792A1 (fr
Inventor
Alois JAMMERNEGG
Georg Reck
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.)
Andritz AG
Original Assignee
Andritz AG
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Filing date
Publication date
Application filed by Andritz AG filed Critical Andritz AG
Publication of EP3406792A1 publication Critical patent/EP3406792A1/fr
Application granted granted Critical
Publication of EP3406792B1 publication Critical patent/EP3406792B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
    • B30B9/248—Means for sealing the press zone
    • 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
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts

Definitions

  • the invention relates to a device for sealing the filter press space between two filter press elements in the wedge zone of dewatering machines, especially double belt presses consisting of two rotating filter press belts, with at least two opposite sides of the filter press room between the filter press belts arranged elastic sealing strips which are attached to a support strip.
  • Such seals are used in twin-wire belt presses to limit the fibrous web, in particular pulp web and to prevent lateral leakage of the pulp, in particular pulp suspension in the region of the wedge zone. In the area of the wedge zone, the pressure on the suspension is continuously increased, so that a stable seal is required.
  • Such sealing devices are for example from the DE 34 04 422 A1 known. The attachment is very complex and therefore in an exchange, which must be due to the wear from time to time, also very time consuming. Attempts have been made here by means of bolts with a bayonet connection to create a simplification, but then the terminal block and the support bar must be secured by welding in position.
  • Other sealing devices include the EP 0 299 765 A2 known.
  • a plastic block is used, which must be very precisely adapted to the geometry of the wedge between the filter press belts (screen belts), which occur even at a low wear leaks.
  • the shows DE 31 39 797 A1 a lateral edge seal of a filter system with a drum filter and a press belt. The seal is connected to the filter drum with a dovetail joint. With lateral load of the profile piece, there is a risk that this part gives way and the gap to the press belt is no longer tight.
  • the aim of the invention is therefore to provide a sealing device which is easy and quick to assemble and has a long life with complete sealing effect even when worn.
  • the invention is therefore characterized in that the sealing strips are connected to each associated support strip by a dovetail joint.
  • the assembly and disassembly is then quite easy, with only a screw for securing is provided at the inlet (the largest distance between the two filter press belts).
  • the different length expansion of sealing strip and support strip by the different materials is made possible by the fact that the sealing strip in the dovetail connection can freely expand in the direction of the outlet (closest spacing of the filter press belts).
  • sealing strip consists of a base body and adjoining sealing lips and the sealing lips in the region of the base body have a smaller thickness.
  • the wedge can be made closer together, resulting in thinner and better pressed pulp bands.
  • a favorable embodiment of the invention is characterized in that the base body has an upper and a lower longitudinal groove.
  • Fig. 1 a shows a wedge zone 1 of a double belt machine also called twin wire press or twin wire press.
  • a pulp suspension in particular pulp suspension
  • a top wire 3 or upper filter press belt
  • a bottom wire 4 lower filter press belt
  • sealing devices 5 are used on both sides, which are also intended to limit the web width of the pulp web.
  • cross section in Fig. 1b It can be seen that the sealing device abuts both the upper wire 3 and the lower wire 4.
  • the existing in the area 6 pulp suspension, which is formed into a web here increases the sealing effect of the upper sieve 3 and 4 Untersieb 4 sealing strip 7.
  • the sealing devices 5 are adjustable transversely to the web running direction, so that different web widths can be adjusted.
  • Fig. 2 now shows a sealing device 5 according to the prior art.
  • the sealing strip 7 made of elastic material (elastomer) is connected by screws 10 by means of a terminal block 9 with a support bar 8.
  • Both the support strip 8, as well as the terminal block 9 are generally made of stainless steel.
  • the fastening of the sealing strip 7 and terminal strip 9 to the support strip 8 is carried out by a number of screws 10 over the entire length of the sealing device 5.
  • a number of bolts may be provided which function as a bayonet lock, in which case during assembly, the terminal block must be moved. It must then be fixed at their ends to the support bar 8 usually by spot welding.
  • the wings 7 ', 7 "of the sealing strip 7 are pressed by the suspension against the upper sieve 4 and the lower sieve 4 and therefore seal well, the upper sieve 3 being supported by a mostly perforated wedge plate 11 while the lower sieve is supported by a wedge plate 12
  • the squeezed liquid then passes through the top wire 3 or bottom wire 4 and the adjacent wedge plate 11 or 12, which often have a plurality of holes.
  • Fig. 3 shows a variant of the sealing device according to the invention 5.
  • the attachment of the sealing strip 7 on the support bar 8 takes place here via a dovetail connection 13.
  • the previously required terminal block 9 ( Fig. 2 ) is no longer necessary.
  • This design allows for quick and easy assembly and disassembly of the sealing strip 7.
  • the sealing strip 7 must be secured only at the inlet end (largest distance of the filter press belts 3.4 near the guide rollers 2) with a screw. This position is always easily accessible and therefore there are no other parts to dismantle.
  • sealing strip 7 which consists of elastic plastic, such as Robadur, and the support bar 8 made of stainless steel is unhindered possible that the sealing strip 7 in the dovetail joint 13 can expand unhindered.
  • the wings 7 ', 7 "of the sealing strip 7 can be compressed very far, but this is limited, so that always a gap between the filter press belts 3, 4 and the sealing strip 7 remains.
  • Fig. 4 shows the sealing strip 7 of a further variant of the invention.
  • the sealing strip 7 is executed on its one side with the dovetail joint 13.
  • the wings 7 ', 7 extendend. Between the sealing strip body 14 and the wings 7', 7", grooves 15 extend over the entire length of the sealing strip 7.
  • Fig. 5 shows the installation position of the sealing strip 7 according to Fig. 5 , It can be seen here again that no terminal strip is required by the stable dovetail connection 13.
  • upper sieve 3 and Untersieb 4 merged to the height of the sealing strip body 14 and thus the gap can be reduced. This increases the web quality.
  • the kink of the wings 7 ', 7 "laid in the connection to the sealing strip body of the wires away in the sealing strip body 14 so that it can not be damaged.
  • the application is not limited by the examples. Thus, e.g. The most diverse materials are used for sealing strip and support strip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Filtration Of Liquid (AREA)

Claims (3)

  1. Dispositif permettant de rendre étanche l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme (1) des machines de déshydratation, en particulier les presses à double bande, constitué de deux bandes de filtre-presse rotatives (3, 4), comprenant au moins sur deux faces en vis-à-vis de l'espace de filtre-presse entre les bandes de filtre-presse, des baguettes d'étanchéité élastiques (7) qui sont fixées sur une barre de support (8), caractérisé en ce que les baguettes d'étanchéité sont reliées à la barre de support respectivement associée, par un assemblage à queue d'aronde (13).
  2. Dispositif selon la revendication 1, caractérisé en ce que la barre d'étanchéité est constituée d'un corps de base (14) et de lèvres d'étanchéité (7', 7") y étant raccordées et en ce que les lèvres d'étanchéité présentent dans la zone du corps de base une épaisseur inférieure.
  3. Dispositif selon la revendication 2, caractérisé en ce que le corps de base présente une rainure longitudinale (15) supérieure et inférieure.
EP18163874.3A 2017-05-22 2018-03-26 Dispositif destiné à étanchéifier l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme de la presse-pâte Active EP3406792B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50432/2017A AT520009A1 (de) 2017-05-22 2017-05-22 Vorrichtung zum abdichten des filterpressraumes zwischen zwei filterpresselementen in der keilzone von entwässerungsmaschinen

Publications (2)

Publication Number Publication Date
EP3406792A1 EP3406792A1 (fr) 2018-11-28
EP3406792B1 true EP3406792B1 (fr) 2019-09-18

Family

ID=61768186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18163874.3A Active EP3406792B1 (fr) 2017-05-22 2018-03-26 Dispositif destiné à étanchéifier l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme de la presse-pâte

Country Status (5)

Country Link
EP (1) EP3406792B1 (fr)
AT (1) AT520009A1 (fr)
BR (1) BR102018008883B1 (fr)
ES (1) ES2755896T3 (fr)
PT (1) PT3406792T (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3139797A1 (de) * 1981-10-07 1983-04-21 Krauss-Maffei AG, 8000 München Filteranlage
JPS59104299A (ja) * 1982-12-03 1984-06-16 Shinryo Air Conditioning Co Ltd ベルトプレス型汚泥脱水装置
DE3404422A1 (de) * 1983-03-24 1984-10-04 Anstalt für Strömungsmaschinen GmbH, Graz Dichteinrichtung der keilpartie von entwaesserungsmaschinen
AT395736B (de) * 1991-07-11 1993-02-25 Andritz Patentverwaltung Einrichtung zur behandlung eines zwischen mindestens zwei endlosen durchlaessigen baendern gefoerderten materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
AT520009A1 (de) 2018-12-15
PT3406792T (pt) 2019-11-21
BR102018008883A2 (pt) 2019-03-26
BR102018008883B1 (pt) 2023-12-26
EP3406792A1 (fr) 2018-11-28
ES2755896T3 (es) 2020-04-24

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