EP1371924B1 - Appareil de séchage - Google Patents

Appareil de séchage Download PDF

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Publication number
EP1371924B1
EP1371924B1 EP03011492A EP03011492A EP1371924B1 EP 1371924 B1 EP1371924 B1 EP 1371924B1 EP 03011492 A EP03011492 A EP 03011492A EP 03011492 A EP03011492 A EP 03011492A EP 1371924 B1 EP1371924 B1 EP 1371924B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
nozzle arrangement
dryer device
drying
air
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
EP03011492A
Other languages
German (de)
English (en)
Other versions
EP1371924A1 (fr
Inventor
Reinhardt Listmann
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.)
Duo Technik GmbH
Original Assignee
Duo Technik 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 Duo Technik GmbH filed Critical Duo Technik GmbH
Publication of EP1371924A1 publication Critical patent/EP1371924A1/fr
Application granted granted Critical
Publication of EP1371924B1 publication Critical patent/EP1371924B1/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
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • 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
    • F26B13/24—Arrangements of devices using drying processes not involving heating
    • F26B13/28—Arrangements of devices using drying processes not involving heating for applying pressure; for brushing; for wiping

Definitions

  • the invention relates to a drying device, in particular for a printing press, according to the preamble of patent claim 1, which is derived from EP-A-647 524.
  • Dryers of the type mentioned are used in particular, but not exclusively, for drying of printing material sheets or webs in rotary printing for use.
  • rotary printing for example, in multi-color flexo printing, e.g. when corrugated direct printing necessary to dry the substrate web or the corrugated sheets after passing the inking and also when leaving the printing press to prevent contamination of each subsequent inking units to achieve the desired high throughput speeds through the printing press and handling to facilitate and accelerate the finished printed webs or finished printed sheets.
  • drying effect of the drying medium blown onto the web is also limited where it is no longer possible to make a large part of the volume flow within the boundary layer region on the web surface, which is decisive for the passage of moisture into the drying medium.
  • the dryer device initially has, in a manner known per se, at least one nozzle arrangement whose nozzle exit takes place along an elongate line, so that the line-shaped admission of a continuous printing material web or continuous printing material sheets transversely to the passage direction is possible.
  • This can be in particular, but by no means exclusively, a slot die arrangement, by means of which a drying medium, in particular air, can be inflated onto the surface to be dried in order to absorb solvent vapor.
  • the effective nozzle opening cross section or the inside width of the slot die is not in the range of several millimeters as in the prior art, but has a dimension of only 0.01 to 0.5 mm, preferably 0.02 to 0.2 mm on.
  • the invention extremely low effective nozzle cross-section - in a slot die so a nearly hair-thin nozzle gap - first leads at the nozzle gap to the exit of the drying medium in the form of a sharp, laminar jet with a very high exit velocity.
  • the outflowing volume flow is greatly reduced compared with the known dryer devices.
  • the theoretically also reduced maximum vapor absorption capacity of the reduced volume flow is more than compensated by the fact that the narrow and sharp jet initially generates much higher shear rates for the evaporation effect in the immediate boundary layer of the wet surface of the printing material.
  • the sharp jet of gas entering the boundary layer at high velocity produces extremely intense turbulence following the immediate boundary layer.
  • the particular jet properties and the flow conditions achieved in the area of the surface of the printing material ultimately result in almost the entire amount of air contained in the jet participating in the moisture exchange between the web surface and gas stream, whereby the thermodynamically maximum possible moisture absorption of the gas stream to a much larger part take advantage of this is the case with the known drying equipment.
  • the drive power of the pressure generating or ventilating device, the heating power required for heating the gas flow and the line cross section required for supplying the gas flow to the dryer device can be greatly reduced As a result, it leads to significant cost savings in the purchase and operation of the plant.
  • blowers or pressure generators that are not designed for a high volume throughput, but instead are suitable for generating a relatively large overpressure at low flow rate advantageous for this purpose.
  • the nozzle arrangement is acted upon by compressed gas or compressed air. Exposure to compressed air precludes the previously described characteristic of the nozzle arrangement with a particularly fine nozzle exit insofar as an air jet with a sufficiently large mass flow and with the desired high exit velocity can be produced in this way even with an extremely narrow or hair-thin nozzle exit.
  • the application of a particularly fine slot die with compressed air is also and especially advantageous from the point of view of saving energy and from the viewpoint of the smallest possible line cross sections.
  • the air mass flow to be introduced into the printing press and to be supplied to the nozzle arrangement the lower the required line cross section and the mechanical power required for compacting and the heating power which may be required for additional heating of the drying air.
  • the nozzle arrangement is at a substantially elongated prismatic Nozzle main body arranged.
  • a substantially rod-shaped nozzle body can be structurally particularly simple and flexible accommodate within the small space available in the printing press.
  • the nozzle base body and / or the nozzle arrangement has an outer cross-sectional shape which tapers in the direction of the nozzle outlet in the manner of a blade.
  • the heat generated in the compression of the air in the compressor in full for the drying process be used because the machine and flow parameters can be tuned so that the hot air at the nozzle outlet still mixed with the ambient air, that the mixed air when hitting the surface to be dried of the printing material an optimal temperature level in the range of about 100 ° C occupies.
  • the nozzle assembly is supplied directly by a compressor or compressor with compressed gas or compressed air.
  • a compressor or compressor with compressed gas or compressed air.
  • an additional heating or Cooling be arranged between the compressor or compressor and nozzle assembly.
  • auxiliary heating or cooling which may be embodied, for example, as integrated into the compressed air line heat exchanger, the temperature level of the compressed air and thus the impinging on the surface to be dried mixed air, if necessary, adjust up or down.
  • the drying medium or the compressed air blown onto the printing material web In order to achieve rapid, effective and uniform drying over the entire web width, it is necessary for the drying medium or the compressed air blown onto the printing material web to be led away again from the surface to be dried.
  • the drying medium or the compressed air after absorption of moisture from the surface to be dried is actively sucked back from the drying area. It looks a special preferred embodiment of the invention that the suction direction of the moist air from the surface to be dried is substantially opposite to the direction of inflation. In this way, it is possible to achieve a highly effective extraction of the moist air, which also takes place in a space-saving and uniform manner over the entire width of the printing material web.
  • nozzle arrangement and nozzle body are arranged in the region of the slot-shaped opening of an elongated prismatic, in cross-section U- or C-shaped nozzle box.
  • suction of the moist drying air by generating negative pressure in the nozzle box, opposite to the direction of inflation by the slot-shaped opening of the nozzle box.
  • FIG. 1 shows in a schematic block diagram-like representation of the structure of a dryer, which is for example part of a printing machine for printing on corrugated cardboard by the flexographic printing process.
  • 1 designates the compressor or compressor, which sucks air from the environment at 2, compresses them, and releases the air in the form of heated compressed air at 3 by compression.
  • Downstream of the compressor 1 is a heat exchanger 4 with blower 5, with which the compressed air 3 additionally heated as needed, but if necessary, can also be cooled.
  • the brought to the intended temperature compressed air is then distributed after leaving the heat exchanger 4 to a number of presently five schematically indicated slot dies 6, of which, for example, each nozzle can be assigned to one of the inking units of a multi-color flexographic printing machine.
  • the heated compressed air 5 flows out and thereby additionally entrains cooler ambient air, with which it mixes.
  • the mixed air then impinges on the printing material web to be dried, which is guided past the nozzle opening 7 of the slot die 6 at a small distance (not shown in the drawing) and absorbs the moisture present therefrom from the fresh printing ink, causing the printing ink to dry on the web.
  • the now steam-laden drying air bounces back due to the high flow rate of the printing material and is sucked by the fans 8 each and fed to the environment.
  • FIG. 2 shows the basic structure of the area of the nozzle assembly of the dryer device.
  • FIG. 2 shows the arrangement of the slot dies 6 in the drawing-related upper area of an elongate nozzle box 9. Furthermore, one recognizes the running inside the nozzle box 9 supply line 10 through which the hot runner 6 hot compressed air is supplied.
  • FIG 3 shows the nozzle box 9 with slot dies 6 and with the compressed air distribution line 12 arranged between the slot dies 6, from which the compressed air is distributed uniformly over the entire length of the slot dies 6 into the slot die 6 by means of a plurality of regularly arranged along the slot dies 6 becomes.
  • a pipe connection 14 can be seen in FIG. 3 , via which the interior of the nozzle box 9 can be subjected to negative pressure by an exhaust fan 8 (not shown in FIG. 3) .
  • the recognizable in Fig. 3 grid-like structure 15 in the nozzle box 9 indicates that Druck Kunststoffverteiltechnisch 12, nozzle 13 and slot dies 6 are arranged on top of a nozzle box 9 covering the perforated plate 15.
  • Fig. 4 shows the nozzle box 9 with the two slot dies 6 of FIG. 2 and 3 in cross section. It can be seen the connection of the slot dies 6 with the compressed air distribution line 12 via the nozzle 13 and the connection between the compressed air distribution line 12 and the center out in the nozzle box 9 compressed air supply line 10, which is provided with a thermal insulation 11.
  • the drawing-related left of the nozzle box 9 arranged angled sheet metal element is used in a known manner the trouble-free passage of the printing material or the printing material sheets through the dryer.
  • the nozzle strips 6 consist of two substantially symmetrical halves which, when combined, each form a cavity for supplying the compressed air and the actual nozzle gap.
  • This two-part design of the nozzle strips 6 is particularly important in terms of a simple, but highly accurate manufacturability of the fine nozzle gap of importance.

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)
  • Adjustment And Processing Of Grains (AREA)

Claims (9)

  1. Dispositif de séchage, en particulier pour machine à imprimer, comportant au moins un ensemble de buses (6) avec une sortie de buse (7) allongée à action linéaire, en particulier un ensemble de buses à fente large, destiné à souffler un fluide de séchage, en particulier l'air, sur une surface (16) à sécher,
    caractérisé en ce que
    l'ensemble de buses (6) comporte des buses avec une largeur d'ouverture efficace de 0,01 mm à 0,5 mm, de préférence 0,02 mm à 0,2 mm et reçoit de l'air comprimé ou gaz sous pression dont la pression directement avant l'entrée dans l'ensemble de buses (6) est de l'ordre de 2 bars à 4 bars.
  2. Dispositif de séchage selon la revendication 1, caractérisé en ce que l'ensemble de buses (6) est monté sur un corps de base prismatique sensiblement allongé.
  3. Dispositif de séchage selon la revendication 1 ou 2, caractérisé en ce que le corps de base et/ou l'ensemble de buses (6) ont une section extérieure se rétrécissant en forme de lame dans la direction vers la sortie de buse (7).
  4. Dispositif de séchage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'ensemble de buses (6) est alimenté en air comprimé directement par l'intermédiaire d'un compresseur (1).
  5. Dispositif de séchage selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'un dispositif de chauffage supplémentaire ou un dispositif de refroidissement supplémentaire (4, 5) est monté entre le compresseur (1) et l'ensemble de buses (6).
  6. Dispositif de séchage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le fluide de séchage est à nouveau aspiré hors de la zone de séchage immédiatement après l'absorption de liquide de la surface (16) à sécher.
  7. Dispositif de séchage selon la revendication 6, caractérisé en ce que la direction d'aspiration est sensiblement opposée à la direction de soufflage.
  8. Dispositif de séchage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'ensemble de buses (6) est monté dans la zone de l'ouverture d'un boîtier (9) prismatique ouvert, sensiblement allongé, avec une section sensiblement en forme de U ou de C.
  9. Dispositif de séchage selon l'une quelconque des revendications 6 à 8, caractérisé en ce que l'aspiration est effectuée à travers l'ouverture en forme de fente du boîtier (9) moyennant la production d'une dépression dans le boîtier (9).
EP03011492A 2002-06-10 2003-05-21 Appareil de séchage Expired - Lifetime EP1371924B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10225753A DE10225753B4 (de) 2002-06-10 2002-06-10 Trocknereinrichtung
DE10225753 2002-06-10

Publications (2)

Publication Number Publication Date
EP1371924A1 EP1371924A1 (fr) 2003-12-17
EP1371924B1 true EP1371924B1 (fr) 2007-02-14

Family

ID=29557729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03011492A Expired - Lifetime EP1371924B1 (fr) 2002-06-10 2003-05-21 Appareil de séchage

Country Status (6)

Country Link
US (1) US20040040171A1 (fr)
EP (1) EP1371924B1 (fr)
AT (1) ATE354069T1 (fr)
DE (2) DE10225753B4 (fr)
DK (1) DK1371924T3 (fr)
ES (1) ES2282541T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102991118A (zh) * 2012-11-19 2013-03-27 王兆进 一种隧道式红外烘干机射流管的随机偏移排布结构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060148631A1 (en) * 2004-12-30 2006-07-06 Corrugated Supplies Corporation Manufacturing line for making corrugated cardboard
DE102009054865B4 (de) 2009-12-17 2014-11-13 Koenig & Bauer Aktiengesellschaft Trockner
CN107576181A (zh) * 2017-10-16 2018-01-12 北京林业大学 一种单板间歇移动注热式单板干燥机
CN112985020A (zh) * 2021-02-07 2021-06-18 赵文宽 一种负离子水刺无纺布的加工装置及其加工方法

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB895655A (en) * 1958-11-04 1962-05-02 Halley & Sons Ltd James Improved apparatus for drying printed webs of material
US3199222A (en) * 1960-09-12 1965-08-10 Hultgreen Odd Apparatus for drying moving webs
FR1340311A (fr) * 1962-09-06 1963-10-18 Chantiers De Nantes Atel Dispositif de séchage de bandes souples déplacées longitudinalement
US3448907A (en) * 1966-12-05 1969-06-10 Web Press Eng Inc Web positioner bar
US3398466A (en) * 1966-12-22 1968-08-27 Wolverine Corp Slot apparatus for high velocity gas treatment of moving webs
FR1564559A (fr) * 1968-01-08 1969-04-25
US3587177A (en) * 1969-04-21 1971-06-28 Overly Inc Airfoil nozzle
AT362227B (de) * 1979-07-02 1981-04-27 Andritz Ag Maschf Materialbahntrockner
US4788992A (en) * 1987-04-28 1988-12-06 Lewis Corporation Ultrasonic strip cleaning apparatus
GB8911336D0 (en) * 1989-05-17 1989-07-05 Heinz Co H J Removing surface liquid from articles
CA2050543C (fr) * 1990-09-26 1998-09-01 Thomas H. Jensen Methode et appareillage pour secher, cuire et soutenir une fibre revetue
SE468287B (sv) * 1991-04-22 1992-12-07 Infraroedteknik Ab Saett resp anordning foer behandling av en kontinuerlig materialbana
ES2077284T3 (es) * 1991-05-17 1995-11-16 Sundwiger Eisen Maschinen Dispositivo para eliminar liquido de la superficie de un fleje transportado desde una maquina de mecanizacion de flejes.
US6293196B1 (en) * 1993-10-06 2001-09-25 Howard W. DeMoore High velocity, hot air dryer and extractor
BR9510268A (pt) * 1995-02-02 1997-11-04 Minnesota Mining & Mfg Processo e dispositivo para revestir um substrato com uma camada
JP3070511B2 (ja) * 1997-03-31 2000-07-31 日本電気株式会社 基板乾燥装置
US5944956A (en) * 1997-04-22 1999-08-31 Valmet, Inc. Surface-cleaning doctor for use in a papermaking operation and associated method
DE29910122U1 (de) * 1999-06-10 1999-09-23 Platsch, Hans G., 70565 Stuttgart Trocknereinheit
JP3653198B2 (ja) * 1999-07-16 2005-05-25 アルプス電気株式会社 乾燥用ノズルおよびこれを用いた乾燥装置ならびに洗浄装置
US6447640B1 (en) * 2000-04-24 2002-09-10 Georgia-Pacific Corporation Impingement air dry process for making absorbent sheet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102991118A (zh) * 2012-11-19 2013-03-27 王兆进 一种隧道式红外烘干机射流管的随机偏移排布结构
CN102991118B (zh) * 2012-11-19 2016-05-18 王兆进 一种隧道式红外烘干机射流管的随机偏移排布结构

Also Published As

Publication number Publication date
ATE354069T1 (de) 2007-03-15
DK1371924T3 (da) 2007-06-04
EP1371924A1 (fr) 2003-12-17
DE50306472D1 (de) 2007-03-29
ES2282541T3 (es) 2007-10-16
DE10225753A1 (de) 2004-01-08
US20040040171A1 (en) 2004-03-04
DE10225753B4 (de) 2009-08-13

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