EP1046874B1 - Sécheur avec unité de refroidissement intégré - Google Patents

Sécheur avec unité de refroidissement intégré Download PDF

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Publication number
EP1046874B1
EP1046874B1 EP00107460A EP00107460A EP1046874B1 EP 1046874 B1 EP1046874 B1 EP 1046874B1 EP 00107460 A EP00107460 A EP 00107460A EP 00107460 A EP00107460 A EP 00107460A EP 1046874 B1 EP1046874 B1 EP 1046874B1
Authority
EP
European Patent Office
Prior art keywords
dryer
cooling
section
conditioning unit
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.)
Expired - Lifetime
Application number
EP00107460A
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German (de)
English (en)
Other versions
EP1046874A3 (fr
EP1046874A2 (fr
Inventor
Clemens Johannes Maria De Vroome
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.)
Contiweb BV
Original Assignee
Goss Contiweb BV
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 Goss Contiweb BV filed Critical Goss Contiweb BV
Publication of EP1046874A2 publication Critical patent/EP1046874A2/fr
Publication of EP1046874A3 publication Critical patent/EP1046874A3/fr
Application granted granted Critical
Publication of EP1046874B1 publication Critical patent/EP1046874B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials

Definitions

  • the invention relates to a dryer with integrated cooling unit as he is subordinated particularly web-processing rotary printing machines, as well as on a Procedures for drying a material web.
  • US 5,471,847 discloses a web cooling device with the features according to the preamble of patent claim 1.
  • the disadvantages of previous drying concepts should be overcome by that the web primarily by evaporation of a liquid instead of through Heat conduction or convection is cooled. This leaves enough moisture in the Web, so that a shrinkage of the web is omitted and the static charge of the web takes a minimum.
  • the web is up Dried to 2% residual moisture content and thereby absorbed from the surrounding air Moisture up to a moisture content between 4% and 6%. This additional Moisture absorption on the environment according to US 5,471,847 by a specially to intended moisture applicator realized.
  • EP 0 723 126 A1 discloses a control device and an arrangement for one in one industrial dryer continuous drying process.
  • a dryer for floating a web for gradual drying of the web recirculates solvent-containing air inside the dryer. It will be a procedure for better control of the solvent-containing air inside the dryer proposed. This will cause the condensing of the solvents and various solvents based by-products significantly reduced or even completely eliminated.
  • Solvent raising overall safety levels, in which areas are avoided altogether, in which solvent-containing air in high Concentrations.
  • Ambient air enters the dryer and is with the mixed solvent-containing air in the dryer interior.
  • the air mixture becomes the first Zone of the dryer according to EP 0 723 126 A 1 supplied again.
  • the open flame of the Burner is thereby cooled by ambient air from the outside. After cooling the open flame through ambient air will recirculate air from inside the dryer the fresh air mixed.
  • ambient air is used to to cool the open burner flame and undesirable compounds more organic eliminate volatile components.
  • the residence time of the combustion mixture in the burner unit does not appear sufficient in the solution according to EP 0 723 126 A1 sized.
  • DE 32 07 461 A1 relates to a method and an apparatus for drying and subsequent cooling of printed in particular by the offset printing process Webs.
  • the invention relates to a method according to the Offset printing process. After the contactless drying of the printed web The web is guided in S- or Z-train over several cooling rollers. It is through Moistening of the jacket of the first cooling roller under the web side, the first is cooled, an easily cleavable water film between the web and roll shell brought. This measure causes the physical contact of the web with this and the other cooling rollers not soft thermoplastic ink is split. The inclination of the web to form waves across the Passage direction is reduced because the cleavage of the water film as a result of their different thickness in the printed and the non-printed and therefore strong dried areas leads to a uniform moisture distribution.
  • the chill roll stand is separate from the upstream dryer the rotary printing machine arranged.
  • the known dryer / chill roll stand configurations show separate ones Dryer housings and separate housings for chill rolls and rewet units, which are further down from the web level. These are separated arranged housing have the significant disadvantage that occurring in a housing Problems in the next, this rearranged housing, pose further problems for example, the lateral course of the web.
  • Known chill roll stands require a relatively large footprint and thereby increase the overall length a web-fed rotary printing machine.
  • Another object of the present invention is to be seen in the overall length reduce a rotary printing press. Another object of the invention is to be seen in it, to avoid the operator of a roller rotation of the Post evaporation.
  • the dryer may be a heating zone, a Evaporating zone and a cooling zone include, which may be separated from each other or wherein the heating zone and the evaporation zone are combined with each other and only separated from the cooling section.
  • each of these zones are corresponding upper and lower blowers arranged which conditioned air, for example Burner units supplied heating air and emerging from the nozzle bar circulating air, again to the nozzle bars, which extend through the zones of the dryer, lead back.
  • process air and hot air ducting methods which are suitable, a dryer according to the present invention, either in countercurrent or operate in Gleichstrom Kunststoffest.
  • a method for treating a material web run the interconnected methods of heating, the Evaporating, cooling and cooling to a chill roll stand all in one common housing, which from the surrounding ambient atmosphere is encapsulated.
  • a in the inventive arrangement of a combined Trockners /dewalzenstandgephinuses entering web has at its entry in essentially the same entry parameters compared to their exit parameters such as For example, the lateral position of the web, the temperature level and the moisture content.
  • FIG. 1 shows a dryer / chill roll stand configuration according to the present invention Invention, wherein on the outside of the dryer, a burner unit is housed.
  • a dryer 1 comprises a first section 1.1, as well as a second section 1.2 and a third section 1.3.
  • said first section is called the Heating zone referred to in a dryer, in which the nozzles 14.1 heating air 19 is supplied becomes.
  • Said second section is called the solvent evaporating section within Considered a dryer in which the highest concentration of solvents prevails and the highest negative pressure gradient exists.
  • the third section 1.3 of a Dryer 1 is the cooling zone called section, in which however still Temperatures higher than 150 ° C occur.
  • Behind the cooling section 1.3 is directly one Cooling / conditioning unit 2 integrated into the housing of the dryer 9, in which the - Material web, such as a printed paper web, a substantially vertical oriented trajectory, indicated by the reference numeral 26th
  • a burner unit 3 is outside the dryer housing 9 arranged and may, if necessary, contain a Nachverbrennungs worn and a corresponding heat exchanger 8, which is indicated here only schematically and on the right side of the burner unit 3 in Fig. 1 finds.
  • a gas supply 4 is arranged, wherein the burner unit 3 has two hot air outlets 5 contains, are passed through which hot air 20 into the interior of the dryer housing 9 can.
  • a pipe 7 is arranged, which is a recirculation the combustion gases allowed.
  • the housing 9 of the dryer 1 comprises a Dryer inlet 10 and a dryer outlet 11, wherein the dryer outlet 11 in FIG.
  • the dryer housing 9 passes substantially in the horizontal material conveying plane 11 extending between upper Nozzle bar 14 and lower nozzle bar 15.
  • a number of upper blower 16 are added.
  • One first upper fan 16.1 leads hot air 19 to the area of the upper Nozzle bar rows 14.1, which extend through the first dryer section 1.1.
  • another upper fan 16.2 is arranged, which return air 21 is supplied.
  • Hot air 20.1 with a higher Temperature level of about 800 ° C is supplied to the first blower 16.1 and from this the upper nozzle bar rows 14.1 of the first dryer section 1.1 fed.
  • the highest solvent concentration and the highest negative pressure gradient prevails in the Evaporation section 1.2 of the dryer 1 before.
  • the first Drier section 1.1 and the subsequent second dryer section 1.2 by means of a Separating element 30 separated from each other, but this has openings for the passage of Connecting tubes 28 and 29 and openings around the return air 21 the Overflow from the first section 1.1 into the downstream second section 1.2 due to allow the pressure gradient.
  • Behind the second dryer section 1.2 is a third Drum section 1.3 provided.
  • In the third dryer section 1.3 are two fans added.
  • An upper third blower 16.3, the fresh air 18 with Ambient air parameters is supplied and a part of the return air 21, as Cooling zone to be regarded third dryer section 1.3 is supplied.
  • blower 16.4 is return air 21 from the upper Nozzle bar row 14.2 of the second dryer section 1.2 of the exhaust pipe 6 fed to the optionally an afterburner can be arranged downstream.
  • Return air 21 of the nozzle bar row 14.3 of the cooling zone of the dryer, i. e. Section 1.3 is used by the connecting tubes 28, 29 passed to the first dryer section 1.1.
  • a cooling and conditioning unit 2 is integrated into the housing of the dryer 9.
  • the material leaving the third zone 1.3 of the dryer material web enters directly from the dryer in the cooling and conditioning unit 2, without the ambient air outside the dryer housing 9 have been exposed.
  • the last of the cooling rolls 27 may have a separate drive unit 23 in order to ensure a correct inlet of the web leaving the cooling and conditioning unit 2 into the downstream turning bar superstructure.
  • FIG. 2 shows an air routing scheme within a dryer according to the present invention.
  • FIG Invention wherein process air is passed around a section of the dryer.
  • Hot gas 20 can also be supplied to the first dryer section 1.1 can be seen, as can be seen in the air guide scheme of FIG.
  • the hot gas 20 and the air gas mixture which via the connecting tube system 28, 29 in the first Dryer section is led to nozzle rows, which are on both sides of the Bahntransportebene are arranged and a floating transport this Allow material webs.
  • Return air 21 of the nozzle rows in the first Drier section 1.1 is an evaporation section 1.2 through an opening in the Separator 30 is supplied, which between the first and the second Drum section 1.1 or 1.2 may be provided.
  • the Separator 30 are also omitted to allow unimpeded overflow of the Return air 21 of the nozzle rows of the first dryer section 1.1 in the To ensure evaporation section 1.2 of the dryer 1.
  • the second section 1.2 of the Drier 1 that is, the solvent-expelling section 1.1, has the highest negative Pressure gradient before and there is the highest solvent concentration prevailing.
  • the second section 1.2 of the dryer 1 is an exhaust pipe 6 assigned to the exhaust of an optional predictable afterburning unit outside to feed the dryer.
  • the fan assembly 16.2 or 17.2 within the second dryer zone 1.2 distributes the Return air 21 to the corresponding nozzle row sections within the Solvent expelling section 1.2, already in connection with FIG. 1 briefly has been described.
  • Fig. 3 shows an alternative air guiding scheme within a dryer according to the present invention, wherein this is operated in the counter-current mode.
  • hot gas 20 becomes a Burner unit 3 and process air 18 a fan pair 16.3, 17.3 within the third Dried section 1.3 supplied.
  • Return air 21 is then in countercurrent principle with respect on the web transport direction of the third dryer section 1.3 through the Evaporating zone 1.2 of the dryer transported to the heating zone 1.1.
  • the Blower arrangements 16.3, 17.3; 16.2, 17.2; 16.1, 17.1 will be hot gas 20 respectively individually supplied.
  • the return air 21 is gradually solvent-containing, especially within the evaporation zone 1.2. Because the highest Solvent concentration of the air in the dryer with countercurrent principle within the first section of the dryer 1.1 is reached, an exhaust pipe 6 of the zone 1.1 assigned to the solvent-laden exhaust gases of a post-combustion device feed inside or outside the dryer.
  • a separating element 31 is provided. Within this partition element 31 is a Opening provided to an inflow of return air 21 in the To allow evaporation section 1.2.
  • the separating element 30, which in Fig. 3 is shown and the first and the second dryer section separates from each other is not absolutely necessary to separate the sections from each other, it can also be omitted become.
  • FIG. 4 shows an air guiding scheme for a dryer according to the present invention Invention which operates in DC mode.
  • Air guidance schemes have the advantage that the fresh air flow through the cooling and Conditioning unit 2, which is arranged downstream of the dryer and integrated into its housing 9 is, to a further after-evaporation within the cooling and conditioning unit. 2 contributes, regardless of whether the process air stream 18 this cooling and Conditioning unit 2 in an upper portion or in a lower portion passes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Paper (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Advancing Webs (AREA)

Claims (12)

  1. Sécheur (1) pour une bande de matériau, sur la surface de laquelle est appliquée une couleur, avec un logement (9), lequel est divisé en sections (1.1, 1.2, 1.3), lequel comprend un certain nombre de soufflantes (16.1, 16.2, 16.3, 16.4, 17.1, 17.2, 17.3, 17.4) et lequel contient un plan de passage de bande (12), dans lequel est transportée la bande de matériau, une unité de refroidissement et de conditionnement (2) étant disposée directement derrière une dernière section (1.3), laquelle unité contient un ou plusieurs cylindre(s) refroidisseur(s) (27), par l'intermédiaire duquel(desquels) est guidée la bande de matériau (32),
       caractérisé en ce que
       l'unité de refroidissement et de conditionnement (2) est intégrée dans le logement (9) de sorte que de l'air frais (18) soit acheminé au moyen d'une des soufflantes (16.1, 16.3, 17.1, 17.3) dans le logement (9) à travers l'unité de refroidissement et de conditionnement (2), une évaporation ultérieure de solvants à l'intérieur de l'unité de refroidissement et de conditionnement (2) étant favorisée.
  2. Sécheur selon la revendication 1,
       caractérisé en ce que
       les sections du logement (9) comportent une section de chauffage (1.1), une section d'évaporation (1.2) ainsi qu'une section de refroidissement (1.3), l'unité de refroidissement et de conditionnement (2) de la section de refroidissement (1.3) étant disposée en aval de la bande de matériau dans la direction de passage de la bande (13).
  3. Sécheur selon la revendication 2,
       caractérisé en ce que
       l'air frais (18) est amené à la section de chauffage (1.1) autour de la section d'évaporation (1.2).
  4. Sécheur selon la revendication 3,
       caractérisé en ce que
       l'air frais (18) est amené à la section de chauffage (1.1) au moyen de tuyaux de raccordement (28, 29).
  5. Sécheur selon l'une des revendications 2 à 4,
       caractérisé en ce que
       l'air chaud (20.1) d'un niveau de température plus élevé est amené à la section de chauffage (1.1) et/ou l'air chaud (20.3) d'un niveau de température plus bas est amené à la section de refroidissement (1.3) du sécheur (1).
  6. Sécheur selon l'une des revendications précédentes,
       caractérisé en ce que
       la ventilation à l'intérieur du sécheur (1) est orientée à l'encontre de la direction du passage de la bande (13) à travers les sections (1.1, 1.2, 1.3).
  7. Sécheur selon la revendication 6,
       caractérisé en ce que
       l'air de retour (21) est remplacé entre les sections (1.1, 1.2, 1.3) du sécheur (1) à l'opposé de la direction de passage de la bande (12).
  8. Sécheur selon l'une des revendications 1 à 5,
       caractérisé en ce que
       l'air de retour (21) est remplacé entre les sections (1.1, 1.2, 1.3) dans la direction de passage de la bande (13).
  9. Sécheur selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       un premier des cylindres refroidisseurs (27), par l'intermédiaire desquels est guidée la bande de matériau, est disposé à proximité de la sortie du sécheur (1).
  10. Sécheur selon l'une quelconque des revendications précédentes,
       caractérisé en ce que
       les cylindres refroidisseurs (27) ne comprennent dans leur partie intérieure aucune pièce rapportée destinée à dévier le passage du réfrigérant.
  11. Procédé de séchage d'une bande de matériau imprimée au moins sur un côté, comprenant les étapes de procédé :
    guidage de la bande le long d'un plan de passage de la bande (12) à travers un sécheur (1) avec un logement (9), lequel est divisé en sections (1.1, 1.2, 1.3) et comprend un certain nombre de soufflantes (16.1, 16.2, 16.3, 16.4, 17.1, 17.2, 17.3, 17.4),
    guidage de la bande par l'intermédiaire d'un ou de plusieurs cylindre(s) refroidisseur(s) (27) d'une unité de refroidissement et de conditionnement (2), laquelle est disposée directement derrière une dernière section (1.3),
       caractérisé par les étapes de procédé :
    prévoir l'unité de refroidissement et de conditionnement (2) comme une unité de refroidissement et de conditionnement (2) intégrée dans le logement (9),
    aspiration de l'air frais (18) au moyen d'une des soufflantes (16.1, 16.3, 17.1, 17.3) à travers l'unité de refroidissement et de conditionnement (2) dans le logement (9), une évaporation ultérieure des solvants à l'intérieur de l'unité de refroidissement et de conditionnement (2) étant favorisée.
  12. Procédé selon la revendication 11,
       caractérisé en ce que
       les paramètres d'entrée de bande (32) de la bande de matériau, en particulier la température et/ou la teneur en humidité, au niveau de l'entrée (10) du sécheur coïncident sensiblement avec les paramètres de bande (33) au niveau de la sortie (11) du sécheur.
EP00107460A 1999-04-23 2000-04-06 Sécheur avec unité de refroidissement intégré Expired - Lifetime EP1046874B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918669 1999-04-23
DE19918669A DE19918669A1 (de) 1999-04-23 1999-04-23 Trockner mit integrierter Kühleinheit

Publications (3)

Publication Number Publication Date
EP1046874A2 EP1046874A2 (fr) 2000-10-25
EP1046874A3 EP1046874A3 (fr) 2001-09-12
EP1046874B1 true EP1046874B1 (fr) 2005-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107460A Expired - Lifetime EP1046874B1 (fr) 1999-04-23 2000-04-06 Sécheur avec unité de refroidissement intégré

Country Status (4)

Country Link
US (1) US6481118B1 (fr)
EP (1) EP1046874B1 (fr)
JP (1) JP2000343675A (fr)
DE (2) DE19918669A1 (fr)

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DE102006027146B4 (de) * 2006-06-12 2009-06-04 Koenig & Bauer Aktiengesellschaft Verfahren zur Herabsetzung der benötigten Kühlleistung in einem Kühlwalzenständer einer Rollenrotationsdruckmaschine und eine Vorrichtung in einem Kühlwalzenständer mit Kühlwalzen

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DE50009387D1 (de) 2005-03-10
US6481118B1 (en) 2002-11-19
DE19918669A1 (de) 2000-10-26
EP1046874A3 (fr) 2001-09-12
JP2000343675A (ja) 2000-12-12
EP1046874A2 (fr) 2000-10-25

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