WO2016096202A1 - Dispositif de séchage de papier et procédé de nettoyage dudit dispositif - Google Patents

Dispositif de séchage de papier et procédé de nettoyage dudit dispositif Download PDF

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Publication number
WO2016096202A1
WO2016096202A1 PCT/EP2015/074345 EP2015074345W WO2016096202A1 WO 2016096202 A1 WO2016096202 A1 WO 2016096202A1 EP 2015074345 W EP2015074345 W EP 2015074345W WO 2016096202 A1 WO2016096202 A1 WO 2016096202A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle channel
channel
nozzle
guide plates
baffles
Prior art date
Application number
PCT/EP2015/074345
Other languages
German (de)
English (en)
Inventor
RainerKlaus PUMPE
Original Assignee
Voith 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 filed Critical Voith Patent Gmbh
Priority to EP15784031.5A priority Critical patent/EP3234258A1/fr
Priority to CN201580074013.6A priority patent/CN107208374B/zh
Publication of WO2016096202A1 publication Critical patent/WO2016096202A1/fr

Links

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
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • 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
    • D21F5/181—Drying webs by hot air on Yankee cylinder

Definitions

  • the invention relates to a nozzle channel (1) for applying a gaseous medium to a web-shaped material, in particular a paper, board, tissue or pulp web according to the preamble of claim 1, a drying hood for use in a machine for drying a web-shaped material according to the preamble of claim 8, a method for servicing a nozzle channel according to claim 1 1 and a method for maintenance a drying hood according to claim 13.
  • these webs In the manufacture of many web-like materials, particularly in the production of paper, board, tissue or pulp webs, these webs must undergo at least one drying step during the manufacturing process.
  • the material web is guided over steam-heated cylinders.
  • Yankee cylinders In some applications, for example in the drying of tissue webs so-called Yankee cylinders are used.
  • These cylinders have a large diameter of 2m and more.
  • these cylinders comprise drying hoods, the task of which is to apply a hot gas, in particular hot air, to the material web.
  • the hot gas is usually passed into nozzle channels. These nozzle channels distribute the gas across the width of the web.
  • baffles can have the form of baffles.
  • These baffles are mounted in the nozzle channel, eg welded, and the shape of the baffles, the gas stream can be distributed over the length of the nozzle channel accordingly.
  • the long-term operation of such drying devices shows that attach to the nozzles of the nozzle channel impurities, for example by fibers. This will eventually lead to complete or partial blockage of these nozzles. Since this again the uniformity of the web drying can be disturbed, the nozzles or the nozzle channels must be cleaned or maintained regularly.
  • the object of the present invention is therefore to provide a drying device which ensures a distribution of the gas and thus a control of the temperature profile over the width of the material web and still allows easy maintenance of the nozzle channels.
  • the nozzle channel according to the invention for applying a gaseous medium to a web-shaped material comprises a channel body, which has a plurality of nozzles, and baffles, which are provided in the interior of the channel body.
  • means are provided in the nozzle channel with which at least some of the baffles, preferably all baffles in a simple manner from the
  • Nozzle channel can be removed and replaced.
  • baffles are therefore not in the nozzle channel according to the invention with the
  • the baffles for maintenance can be easily removed from the nozzle channel, whereby a maintenance of the nozzle channel is simplified. After completion of the maintenance work, the baffles can again be easily inserted into the nozzle channel.
  • the gaseous medium may be, for example, hot air.
  • the temperature of the gaseous medium can be above 100 ° C., in particular above 200 ° C., advantageously even above 300 ° C.
  • the baffles consist mainly of metal, especially steel.
  • the term baffles should also be understood to mean guide elements made of other suitable materials. For this purpose, for example, polymer materials come into question, fiber-reinforced plastics, or ceramics.
  • the material of the baffles is chosen so that it remains stable even with permanent contact with the hot gaseous medium.
  • the baffles are positively but reversibly connected in a simple manner with the channel body.
  • the baffles are connected via a clamping connection with the channel body.
  • the channel body has on at least one of its end faces, preferably on both end faces depending on an opening through which at least some, preferably all baffles can be easily removed from the nozzle channel and reused.
  • a closure lid is provided on at least one end face, preferably on both end faces.
  • These Cover caps are used to seal the frontal openings. This prevents gas from leaking out of the front-side openings during operation of the nozzle channel, but nevertheless allows the guide plates to be removed via the front-side openings and replaced again for maintenance.
  • the means for easy removal of the baffles comprise at least one common carrier element.
  • At least one guide plate preferably has a plurality of guide plates, particularly preferably all guide plates are connected to this common carrier element.
  • baffles may be rigidly or movably connected to the common carrier element.
  • the common carrier element can be, for example, a rod, a tube or a strip, or the common carrier element can comprise one or more such components.
  • the common carrier element is usually not firmly welded to the channel body.
  • the common carrier element is advantageously designed so that it can be easily reached or gripped by an end opening. By pulling out of the common support member through the frontal opening can thus easily remove all associated baffles in a simple manner from the nozzle channel. In the same way, the baffles can be reused in the nozzle channel after maintenance.
  • baffles it will generally be advantageous to fasten all baffles to a common carrier element.
  • a carrier element extends substantially over the entire length of the nozzle channel.
  • several common carrier elements may be provided.
  • the one common support element can then be removed through the one end opening, and the other common support element through the other end opening.
  • a part of the baffles preferably all baffles may be designed as bulkhead plates. Through such bulkhead plates, the nozzle channel over its length - that is, across the width of the material web - is divided into individual segments.
  • the invention relates to a drying hood for use in a machine for drying a web-shaped material, in particular a paper, cardboard, tissue or pulp web.
  • a machine for drying a web-shaped material in particular a paper, cardboard, tissue or pulp web.
  • it can be a Yankee hood, as used, for example, in the production of tissue papers.
  • the drying hood according to the invention is characterized in that it comprises at least one, preferably a plurality of nozzle channels according to any one of claims 1-7.
  • the drying hood comprises a main feed channel and at least one, preferably two or more distribution channels. Through the main feed channel while the hot gas is passed into the drying hood, and over the distribution channels or the distribution of the gas to the various nozzle channels.
  • the at least one distribution channel is designed in a curved shape.
  • the invention relates to a method for the maintenance of a nozzle channel according to any one of claims 2 to 7.
  • the method comprises the process steps:
  • the nozzle channels can be maintained in the installed state by means of the method according to the invention. You do not have to do this from their installation situation, e.g. be removed from the drying hood.
  • closure lids are provided in the nozzle channel, they are usually removed to the extent that at least one frontal opening is exposed before the process step a), so that the guide plates can be removed by them.
  • a common carrier element is provided, this is advantageously designed so that it can be easily reached or gripped by a frontal opening.
  • process step a for example, by pulling out the common carrier element through the frontal opening, all associated guide plates can be easily removed from the nozzle channel.
  • step c) the baffles can be reused in the nozzle channel after the maintenance work.
  • the maintenance in process step b) may comprise or consist of the cleaning of some or all nozzles of a nozzle channel in an advantageous embodiment of the method.
  • the invention relates to a method for the maintenance of a drying hood.
  • the drying hood is embodied according to one of claims 8-10 and the method for maintenance of the drying hood comprises the maintenance of at least one nozzle channel, which takes place by means of a method according to one of claims 11 or 12.
  • Figure 1 shows schematically a longitudinal section through a nozzle channel with bulkhead plates according to the prior art
  • Figure 1 b shows schematically a longitudinal section through a nozzle channel with baffles according to the prior art
  • Figure 2 shows schematically a longitudinal section through a nozzle channel according to the invention with bulkhead plates
  • Figure 2b shows schematically a longitudinal section through a nozzle duct according to the invention with baffles, one of which is designed as a partition plate.
  • FIG. 3 shows a cross section through a nozzle channel according to the invention.
  • FIG. 4 shows a section through a drying hood.
  • FIGS. 1 and b sections along the length L of a nozzle channel 1 according to the prior art are respectively described.
  • the nozzle channel 1 in each case comprises two supply lines 9 for a hot gas from distribution channels 9. The gas exits the nozzle channel 1 through the nozzles 3 and is applied to the material web.
  • the baffles 4, 4a are designed in the nozzle channel 1 shown in Figure 1 as partition plates 4a. These bulkhead plates 4a are firmly connected to the channel body 2. As a rule, these partition plates 4a are welded to the channel body 2.
  • Figure 1 b shows a nozzle channel 1, in which in the middle of a partition plate is firmly welded to the channel body.
  • the nozzle channel 1 but also provided with further baffles 4, which distributes the flow, which enters from the supply lines 9 in the nozzle channel 1, over the length L of the nozzle channel 1.
  • These baffles 4 are firmly connected to the channel body 2.
  • a maintenance of the nozzle channel 1, especially the cleaning of the nozzles 3 is possible in the cases shown in Figure 1 and 1 b only on the access of the leads 9 and is further complicated by the baffles 4, 4a.
  • FIG. 2 and FIG. 2 b each show a nozzle channel 1 according to the invention.
  • the supply of gaseous medium preferably hot air
  • the gas exits the nozzle channel 1 through nozzles 3 and is applied to a material web such as a tissue web, a pulp web or the like.
  • the nozzle channel 1 shown in FIG. 2 comprises by way of example four guide plates 4, 4a, all of which are designed as partition plates 4a are.
  • more or fewer baffles may be provided.
  • the bulkhead plates 4a are not fixedly connected to the channel body 2 in FIG. In particular, they are not welded or screwed to the channel body 2.
  • the partition plates 4a are inserted into the nozzle channel 1 in a form-fitting manner or with little play.
  • the bulkhead plates 4a are all attached to a common carrier element 7.
  • the carrier element 7 comprises in FIG. 2 a tube, especially a steel tube, which is located approximately in the middle in the nozzle channel.
  • the common support element 7 it is also possible for the common support element 7 to comprise or consist of a rod or a strip.
  • the common carrier element 7 extends in the example shown in FIG. 2 over the entire length L of the nozzle channel 1.
  • the carrier element extends only over part of the length L.
  • two common support elements 7 are provided, each extending over one half of the length L.
  • the nozzle channel 1 shown in FIG. 2 b comprises by way of example five guide plates 4, 4 a, of which one is designed as partition plates 4 a, and the others as guide plates 4.
  • the common carrier element 7 is eccentrically mounted in the nozzle channel 1 in Figure 2b. It can also be provided according to the invention that the common carrier element 7 or parts thereof, is provided on the wall of the channel body 2 or near the wall.
  • the nozzle channels 1 from FIGS. 2 and 2 b have end-side openings 5 on both end faces, which are each closed by a closure lid 6.
  • the nozzle channel 1 has an end-side opening 5 only at one end face.
  • the closure lid 6 By opening the closure lid 6, the frontal opening 5 can be exposed.
  • the guide plates 4, 4 a are removed from the nozzle channel 1 through an end opening 5.
  • the baffles 4, 4 a, or especially the partition plates 4 a, according to the invention can be rigidly connected to the common carrier element 7.
  • the sheets 4, 4a are movably connected to the carrier element.
  • FIG. 3 shows a cross section through a nozzle channel 1 according to the invention.
  • a partition plate 4a extends substantially over the entire cross-section of the channel body 2 and subdivides it therewith.
  • a rod is provided here by way of example, which is mounted in the middle of the channel body 2. With this common support element, the baffles are rigidly fixed in this example.
  • FIG. 4 schematically shows a section through a possible embodiment according to the invention of a drying hood, especially a Yankee hood. It comprises, in addition to the main supply channel 10, two distribution channels which are bent, in the form of so-called .crescent headers. These distribution channels 9 distribute the gaseous medium to the individual nozzle channels. 1 In this case, at least one nozzle channel 1, preferably all nozzle channels 1, is designed as a nozzle channel 1 according to the invention.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un canal de buses (1) pour appliquer un milieu de forme gazeuse sur un matériau en forme de bande, en particulier une bande de papier, carton, tissu ou cellulose. Le canal de buses (1) comprend : un corps de canal (2) qui comprend une pluralité de buses (3) ; ainsi que de tôles de guidage (4,4a) qui sont disposées à l'intérieur du corps de canal (2) ; et des moyens agencés dans le canal de buses (1), avec lesquels au moins une partie, de préférence la totalité des tôles de guidage (4,4a), peuvent être enlevées du canal de buses 1 et ensuite remises dans ledit canal en toute simplicité. L'invention concerne également une hotte de séchage pour la mise en œuvre dans une machine de séchage d'un matériau en forme de bande, en particulier une hotte Yankee, la hotte de séchage ayant au moins un canal de bus, de préférence plusieurs canaux de buses (1) selon l'invention. L'invention concerne en outre un procédé de maintenance d'un canal de buse (1) ou d'une hotte de séchage, comportant les étapes suivantes : l'enlèvement de tôles de guidage (4, 4a) par la ou les ouvertures frontales (5) en dehors du corps de canal (2) ; la maintenance du canal de buses (1) par au moins une ouverture frontale (5) ; la mise en place des tôles de guidage (4, 4a) par la ou les ouvertures frontales (5) dans le corps de canal (2).
PCT/EP2015/074345 2014-12-16 2015-10-21 Dispositif de séchage de papier et procédé de nettoyage dudit dispositif WO2016096202A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15784031.5A EP3234258A1 (fr) 2014-12-16 2015-10-21 Dispositif de séchage de papier et procédé de nettoyage dudit dispositif
CN201580074013.6A CN107208374B (zh) 2014-12-16 2015-10-21 用于纸张干燥的设备和用于清洁该设备的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225970 2014-12-16
DE102014225970.3 2014-12-16

Publications (1)

Publication Number Publication Date
WO2016096202A1 true WO2016096202A1 (fr) 2016-06-23

Family

ID=54337763

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/074345 WO2016096202A1 (fr) 2014-12-16 2015-10-21 Dispositif de séchage de papier et procédé de nettoyage dudit dispositif

Country Status (3)

Country Link
EP (1) EP3234258A1 (fr)
CN (1) CN107208374B (fr)
WO (1) WO2016096202A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438235A2 (fr) * 1990-01-16 1991-07-24 W.R. Grace & Co.-Conn. Barre pneumatique de diffusion à buses directionnelles
US20010054239A1 (en) 2000-03-17 2001-12-27 Ringer Volker J. Thermal equalizer
WO2006057696A2 (fr) 2004-11-22 2006-06-01 Metso Paper Usa, Inc. Insert de buse pour capot de contact de type yankee

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012335A (en) * 1957-11-16 1961-12-12 Svenska Flaektfabriken Ab Treating web-like material by a gaseous medium
CN203807883U (zh) * 2014-04-28 2014-09-03 彭锦铜 一种孔式分区调节风量气罩

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438235A2 (fr) * 1990-01-16 1991-07-24 W.R. Grace & Co.-Conn. Barre pneumatique de diffusion à buses directionnelles
US20010054239A1 (en) 2000-03-17 2001-12-27 Ringer Volker J. Thermal equalizer
WO2006057696A2 (fr) 2004-11-22 2006-06-01 Metso Paper Usa, Inc. Insert de buse pour capot de contact de type yankee

Also Published As

Publication number Publication date
CN107208374B (zh) 2019-09-03
CN107208374A (zh) 2017-09-26
EP3234258A1 (fr) 2017-10-25

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