EP0437232B1 - Nasskreislauf einer papier macherpresse mit Zentrifugalentwässerung des Pressfilzes - Google Patents

Nasskreislauf einer papier macherpresse mit Zentrifugalentwässerung des Pressfilzes Download PDF

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Publication number
EP0437232B1
EP0437232B1 EP91100167A EP91100167A EP0437232B1 EP 0437232 B1 EP0437232 B1 EP 0437232B1 EP 91100167 A EP91100167 A EP 91100167A EP 91100167 A EP91100167 A EP 91100167A EP 0437232 B1 EP0437232 B1 EP 0437232B1
Authority
EP
European Patent Office
Prior art keywords
felt
wet
press
water
centrifugal device
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.)
Expired - Lifetime
Application number
EP91100167A
Other languages
English (en)
French (fr)
Other versions
EP0437232A1 (de
Inventor
Patrick Penven
Jacques Valois
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.)
COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA
Original Assignee
COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA
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 COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA filed Critical COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA
Publication of EP0437232A1 publication Critical patent/EP0437232A1/de
Application granted granted Critical
Publication of EP0437232B1 publication Critical patent/EP0437232B1/de
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 present invention relates to a wet circuit of a stationery press comprising a wet felt and a centrifuge device imparting to the wet felt a trajectory of strong curvature causing the rejection of water by centrifugation, said wet felt comprising a canvas provided with a upper thick water-absorbent sheet.
  • the centrifuge device requires no external energy.
  • the wet circuit according to the invention with centrifuge device making the use of a suction system unnecessary is characterized in that the lower sheet of the wet felt in contact with the centrifuge device is impermeable.
  • An impermeable lower layer consists of an impermeable layer or a permeable layer coated with an impermeable sheet. .
  • the presence of an impermeable sheet in contact with the centrifuge device promotes sliding on this device and reduces abrasion.
  • water can be sent to the impermeable layer upstream of the centrifuge device, which promotes the sliding of the felt on the device without increasing the amount of water in the felt.
  • FIG. 1 and 2 shows a wet circuit according to the invention.
  • FIG. 3 represents a centrifuge device for a wet circuit according to the invention.
  • FIGS 4 to 6 show wet felts according to the invention.
  • the stationery press wet circuit according to the invention is shown in figure 1.
  • the wet felt 1 rotates in a closed circuit and passes between two press cylinders 2 while supporting the sheet 3.
  • This felt 1 is to extract part of the water transported by the sheet 3.
  • This cylinder must be at most 6 inches in diameter (15 cm), preferably the diameter will be close to 2 inches (5 cm) so that the centrifugal force is sufficient to eject the water.
  • the wet felt 1 comprises a canvas 7, a thick upper sheet 8 intended to be in contact with the sheet and a lower sheet 9.
  • This lower sheet 9 consists of an impermeable layer which can for example be fixed to the canvas 7 by gluing ( Figure 4) or by induction ( Figure 5) or consisting of a permeable layer 10 on which is bonded an impermeable sheet 11 ( Figure 6).
  • the press cylinders 2 no longer need to be grooved or suction since the underside of the felt 3 being impermeable, it forms a barrier blocking the movement of water towards these cylinders 2. It is therefore possible to use full cylinders 2 .
  • the centrifugation force depends on the square of the speed of the felt and is inversely proportional to the radius of the centrifuge cylinder 5 which is the radius of curvature of the trajectory of the felt.

Landscapes

  • Paper (AREA)
  • Making Paper Articles (AREA)
  • Drying Of Gases (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (5)

  1. Naßkreislauf für eine Papiermacherpresse, die Preßzylinder (2), einen nassen Filz (1), der eine Papierbahn (3) trägt und zwischen die Preßzylinder (2) läuft, und eine Zentrifugiereinrichtung (4) aufweist, die dem nassen Filz (1) eine Bewegungsbahn starker Krümmung verleiht, durch die Wasser mittels Zentrifugieren herausgeschleudert wird, wobei der nasse Filz (1) ein Netz (7) aufweist, das mit einer dicken oberen wasserabsorbierenden Lage (8) in Berührung mit der Papierbahn (3) steht, dadurch gekennzeichnet, daß die untere Lage (9) des mit der Zentrifugiereinrichtung (4) in Berührung stehenden nassen Filzes (1) undurchlässig ist.
  2. Naßkreislauf nach Anspruch 1, dadurch gekennzeichnet, daß er Mittel (12) zum Zuführen von Wasser vor der Zentrifugiereinrichtung (4) auf die untere Lage (9) des Filzes (1) aufweist.
  3. Naßkreislauf nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Richtungsänderung der Bewegungsbahn des Filzes (1) um die Zentrifugiereinrichtung (4) mindestens 270° beträgt.
  4. Naßkreislauf nach Anspruch 3, dadurch gekennzeichnet, daß die Richtungsänderung des Filzes (1) um die Zentrifugiereinrichtung (4) etwa 300° beträgt.
  5. Naßkreislauf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Preßzylinder (2) vollflächig ausgebildet sind.
EP91100167A 1990-01-09 1991-01-07 Nasskreislauf einer papier macherpresse mit Zentrifugalentwässerung des Pressfilzes Expired - Lifetime EP0437232B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000162A FR2656881A1 (fr) 1990-01-09 1990-01-09 Procede de deshydratation d'un feutre humide de papeterie et feutre humide pour l'application de ce procede.
FR9000162 1990-01-09

Publications (2)

Publication Number Publication Date
EP0437232A1 EP0437232A1 (de) 1991-07-17
EP0437232B1 true EP0437232B1 (de) 1994-06-22

Family

ID=9392597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91100167A Expired - Lifetime EP0437232B1 (de) 1990-01-09 1991-01-07 Nasskreislauf einer papier macherpresse mit Zentrifugalentwässerung des Pressfilzes

Country Status (9)

Country Link
EP (1) EP0437232B1 (de)
AT (1) ATE107718T1 (de)
DE (1) DE69102545T2 (de)
DK (1) DK0437232T3 (de)
ES (1) ES2057605T3 (de)
FI (1) FI910089A7 (de)
FR (1) FR2656881A1 (de)
NO (1) NO176407C (de)
ZA (1) ZA91180B (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298904A (en) * 1964-08-10 1967-01-17 Kimberly Clark Co Belt cleaning apparatus for a papermaking machine
FR1411500A (fr) * 1964-10-14 1965-09-17 Rice Barton Corp Procédé et dispositif pour purger des bandes de feutre mobiles, notamment celles utilisées dans les machines à papier

Also Published As

Publication number Publication date
ES2057605T3 (es) 1994-10-16
ZA91180B (en) 1991-10-30
FI910089L (fi) 1991-07-10
ATE107718T1 (de) 1994-07-15
FI910089A0 (fi) 1991-01-07
EP0437232A1 (de) 1991-07-17
NO176407B (no) 1994-12-19
FR2656881A1 (fr) 1991-07-12
DE69102545D1 (de) 1994-07-28
NO910050D0 (no) 1991-01-07
FI910089A7 (fi) 1991-07-10
DE69102545T2 (de) 1994-10-06
NO176407C (no) 1995-03-29
NO910050L (no) 1991-07-10
DK0437232T3 (da) 1994-09-19

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