EP1158092A2 - Section de séchage - Google Patents

Section de séchage Download PDF

Info

Publication number
EP1158092A2
EP1158092A2 EP01105522A EP01105522A EP1158092A2 EP 1158092 A2 EP1158092 A2 EP 1158092A2 EP 01105522 A EP01105522 A EP 01105522A EP 01105522 A EP01105522 A EP 01105522A EP 1158092 A2 EP1158092 A2 EP 1158092A2
Authority
EP
European Patent Office
Prior art keywords
impingement
drying unit
dryer section
section according
impingement drying
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
EP01105522A
Other languages
German (de)
English (en)
Other versions
EP1158092B1 (fr
EP1158092A3 (fr
Inventor
Peter Kahl
Markus Oechsle
Wolfgang Mayer
Georg Kugler
Roland Mayer
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 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
Priority claimed from DE2000125560 external-priority patent/DE10025560A1/de
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1158092A2 publication Critical patent/EP1158092A2/fr
Publication of EP1158092A3 publication Critical patent/EP1158092A3/fr
Application granted granted Critical
Publication of EP1158092B1 publication Critical patent/EP1158092B1/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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated cylinders

Definitions

  • the invention relates to a dryer section of a machine for production a material web, in particular a paper or cardboard web.
  • the aim of the invention is to provide a dryer section of the type mentioned to create with both at high machine speed the best possible drying rate at the beginning of drying as well as secure web guidance is guaranteed. In particular, reliable transfer must also be ensured.
  • This object is achieved according to the invention in that between the last press nip of a press section and a subsequent impingement or impingement drying unit, in particular a larger one A pick-up suction roller is provided that runs through the web of material the last press nip guided press felt or takes off from a transfer belt and passed to the impingement drying unit.
  • the outside diameter of the pick-up suction roller is preferably in the range from about 1.2 to about 2.5 m.
  • the pick-up suction roller is wrapped in a sieve.
  • the sieve in question is tensioned accordingly.
  • a wire run control can also be provided. It can also be the fabric tension be regulated accordingly.
  • the pick-up suction roller is provided with a suitable surface. So this can Pick-up suction roll, for example, be covered with a sieve stocking.
  • the pick-up suction roller can be equipped with an internal suction box or sucked over their jacket by an external suction box his.
  • the jacket can, for example, with depressions such as especially grooves or the like.
  • the pick-up suction roller is advantageously with a multi-zone Suction box provided to cross and / or machine direction set different vacuum levels and / or different To be able to use the suction box bracket.
  • the impingement drying unit advantageously comprises one in particular Larger backup roller or the like with an assigned impingement dryer, the web of material through the pick-up suction roll the backup roller is passed.
  • Impingement drying units comprising impingement dryers be provided.
  • the outer diameter of a respective support roller is expediently in the range from about 2.5 to about 8 m and preferably in the range from about 3 to about 5 m.
  • the outside diameter of the enlarged pick-up suction roll is preferred smaller than that of a respective backup roller.
  • the back-up roller is wrapped in a sieve. Accordingly the web of material from the pick-up suction roller to the back-up roller Pass the impingement drying unit around the sieve.
  • the support roller of a respective impingement drying unit can in particular be formed by a suction roll or a cylinder.
  • the back-up roll can, however, also be one over several Support rollers guided support band may be provided. In this case they are Support rollers suitably at least partially on an arc arranged.
  • At least one with at least one impingement hood is preferred provided impingement drying unit provided.
  • From such an impingement hood is preferably directly on blown the web of material.
  • the material web can, for example, have a dry content in the region from about 55 to about 65% before being the first cylinder group is fed. The lower the basis weight, the higher the Ash content and the higher the machine speed, the higher must be the dryness reached by the first group of cylinders.
  • the dryer section according to the invention is in the impingement drying unit provided after the last press nip the impingement hood is positioned in this way and / or the wrap angle covered by this is selected so that a minimum distance between the associated larger backup roller and the last press nip is made possible. It includes the im Connection to the last press nip provided impingement drying unit preferably a one-piece impingement hood, while each may subsequent subsequent impingement drying unit expediently each with a two-part hood is provided.
  • the material web is advantageously from the sieve of the one preceding unit directly to the large one Transfer the backup roller to the other unit below. This will the straight piece in the path of the web between the two units concerned kept as short as possible.
  • Successive impingement drying units can alternate be arranged so that the relevant impingement flows different web sides are loaded. It is of advantage if provided in the connection after the last press nip Impingement drying unit the top and in the following Impingement drying unit applied to the underside of the material web becomes. In principle, however, it is also possible to start with the bottom and then to act on the top of the material web.
  • the pick-up suction roller according to the invention in particular a larger one, can thus in particular together with one or more subsequent ones Impingement or impingement flow dryers on a respective larger one Back-up roll, e.g. Suction roll or cylinder, and especially after one Press section are used in which all nips double felted or double covered, i.e. each with two felts or one felt and one Transfer ribbon are provided.
  • the enlarged pick-up suction roller according to the invention can also be used in a high-speed paper machine, i.e. at machine speeds greater than, for example, about 1400 m / min and preferably greater than 1500 m / min, for low basis weights (e.g. newspaper printing, SC, LWC).
  • Claims 21 to 29 are further advantageous embodiments specified the dryer section according to the invention, which is already for considered to be usable with advantage and accordingly in particular also as alternative independent design variants of the invention Dryer section can be viewed.
  • dryer section characterized in that they have at least one between the last press nip of a press section and a first multi-cylinder group provided impingement drying unit and that Impingement drying unit provided after the last press nip is provided with a one-piece impingement hood, preferably during at least one further impingement drying unit a multi-part, in particular two-part impingement hood assigned.
  • the drying section can at least one between the last press nip of a press section and one the first multi-cylinder impingement drying unit include the dryness of the web to a value in the range increase from about 55 to about 65%.
  • the cross shrinkage and moisture expansion in the printing press are closely related. A more balanced shrink cross profile leads to better Paper behavior in the printing process. For example, there are fewer Registration and running problems in web offset printing.
  • the drying section at least one preferably between the last Press nip of a press section and a first multi-cylinder group provided Impingement drying unit with upstream or integrated IR unit.
  • Impingement drying unit with upstream or integrated IR unit is used in particular for Warm up the material web.
  • the invention comprises Drying section at least one impingement drying unit, which at a machine speed in the range of about 70 to about 120 m / s, preferably in the range from about 80 to about 100 m / s, and / or at a temperature of about 250 to about 450 ° C, preferably in the range from about 250 to about 350 ° C, is operable.
  • the invention comprises Drying section at least one impingement drying unit, the Hood with perforated nozzles and / or preferably with perforated screens Scraps, i.e. especially scraps of paper, covered suction slots is provided.
  • the perforated nozzles can in particular have a diameter have in the range of about 6 to about 10 mm.
  • the through pinhole covered suction slots have an open nozzle area in the area from preferably about 1.5 to about 3.5%.
  • Another variant of the dryer section according to the invention is characterized in that it has at least one impingement drying unit includes and that before and / or after each Impingement drying unit or between successive impingement drying units a respective tear sensor is provided. Partial breaks must also be recognized, so that monitoring expediently not only over an edge, but over the width he follows.
  • an optical sensor can be provided.
  • a vacuum measurement is preferably carried out in the suction rolls or in the Pick-up roller.
  • Figure 1 shows a purely schematic representation of a dryer section 10 of a Machine for producing a material web 12, which is in particular can be a paper or cardboard web.
  • the outer diameter of the larger pick-up suction roller 20 can, for example range from about 1.2 to about 2.5 m.
  • the pick-up suction roller 20 is wrapped in a sieve 24.
  • the impingement drying unit 18 comprises a larger backup roller 26 with associated impingement or impact flow dryer, which in in the present case comprises a one-piece impingement hood 28.
  • the web of material 12 is placed on the support roller 26 by the pick-up suction roller 20 transferred to this impingement drying unit 18.
  • the support roller 26 can in particular have an outside diameter in the region from for example about 2.5 to 8 m and preferably in the range from about 3 to about 5 m.
  • the support roller 26 is surrounded by a screen 30 and formed by a suction roll, which here is an outer suction box 32 assigned.
  • the takeover of the material web 12 by the large support roller 26 is by a distance L behind the pick-up suction roller in the direction of web travel 20 arranged, provided within the loop of the sieve 24 Deflection roller 34 supports. After this guide roller 34 on the Support roller 36 abuts, the screen 24 and thus the material web 12 in Area between the pick-up suction roller 20 and the deflection roller 34 the support roller 26 created.
  • the material web 12 is in the area a suction roller 36 from the screen 38 of a first multi-cylinder group 40 several drying cylinders 42 taken over. The takeover takes place so that in the event of a tear between the sieves 30 and 38 can fall into the basement 44.
  • FIG. 2 differs from that previously described Embodiment essentially in that on the Connection to the last press nip 14 provided impingement drying unit 18 a further impingement drying unit 18 ' follows.
  • This second impingement drying unit 18 ' also comprises one larger backup roller 26 'and one associated with it, in this case formed by a two-part impingement hood 28 'or Impingement flow dryer.
  • the support roller 26 ' again formed by a suction roll, for example an outer one Suction box 32 'is assigned.
  • the diameters are of the two support rollers 26, 26 'at least substantially the same size.
  • the second backup roller 26 is from the screen 38 of the first multi-cylinder group 40 entwined.
  • the web of material 12 is Sieve 30 of the first impingement drying unit 18 directly to the large support roller 26 'of the following second, wrapped around the screen 38 Transfer impingement drying unit 18 '.
  • the large backup roller 26 ' is obliquely below the large backup roller 26 arranged.
  • the two-part impingement hood 28 ' is the following one second impingement hood 28 generally below the associated large backup roller 26 'arranged.
  • two impingement hoods 28, 28 ' acted on different web sides.
  • FIG. 2 has at least essentially again the same structure as that of Figure 1.
  • each other corresponding parts assigned the same reference numerals.

Landscapes

  • Paper (AREA)
EP01105522A 2000-05-24 2001-03-06 Section de séchage Expired - Lifetime EP1158092B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2000125560 DE10025560A1 (de) 2000-05-24 2000-05-24 Trockenpartie
DE10025560 2000-05-24
DE20017924U DE20017924U1 (de) 2000-05-24 2000-10-19 Trockenpartie
DE20017924U 2000-10-19

Publications (3)

Publication Number Publication Date
EP1158092A2 true EP1158092A2 (fr) 2001-11-28
EP1158092A3 EP1158092A3 (fr) 2002-04-24
EP1158092B1 EP1158092B1 (fr) 2006-09-06

Family

ID=26005807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105522A Expired - Lifetime EP1158092B1 (fr) 2000-05-24 2001-03-06 Section de séchage

Country Status (4)

Country Link
US (1) US6658758B2 (fr)
EP (1) EP1158092B1 (fr)
CA (1) CA2348371A1 (fr)
DE (1) DE50110918D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1715099A1 (fr) * 2005-04-19 2006-10-25 Voith Patent GmbH Dispositif pour la fabrication d'une bande fibreuse
EP1731666A1 (fr) * 2005-06-08 2006-12-13 Voith Patent GmbH Machine à papier
EP1749927A1 (fr) * 2005-08-05 2007-02-07 Voith Patent GmbH Dispositif d'essorage d'une bande fibreuse

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023321A1 (de) * 2004-05-07 2005-11-24 Voith Paper Patent Gmbh Trockenpartie in einer Maschine zur Herstellung einer Faserstoffbahn
CN1950568A (zh) * 2004-05-07 2007-04-18 沃依特专利有限责任公司 制造纤维料幅的机器内的吸辊
ATE527410T1 (de) * 2004-08-16 2011-10-15 Voith Patent Gmbh Papiermaschine mit ein-nip presse
DE102007024811A1 (de) 2007-05-26 2008-11-27 Voith Patent Gmbh Pressanordnung
WO2009043918A2 (fr) * 2007-10-02 2009-04-09 Interuniversitair Microelectronica Centrum Vzw Architecture asip (processeur d'ensembles d'instructions spécifique à une application) permettant de décoder au moins deux procédés de décodage

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1715099A1 (fr) * 2005-04-19 2006-10-25 Voith Patent GmbH Dispositif pour la fabrication d'une bande fibreuse
EP1731666A1 (fr) * 2005-06-08 2006-12-13 Voith Patent GmbH Machine à papier
EP1749927A1 (fr) * 2005-08-05 2007-02-07 Voith Patent GmbH Dispositif d'essorage d'une bande fibreuse
US7628891B2 (en) 2005-08-05 2009-12-08 Voith Patent Gmbh Apparatus for dewatering a fibrous web

Also Published As

Publication number Publication date
EP1158092B1 (fr) 2006-09-06
EP1158092A3 (fr) 2002-04-24
CA2348371A1 (fr) 2001-11-24
DE50110918D1 (de) 2006-10-19
US20010045023A1 (en) 2001-11-29
US6658758B2 (en) 2003-12-09

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