EP2315872B1 - Method and device for drying a paper web - Google Patents

Method and device for drying a paper web Download PDF

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Publication number
EP2315872B1
EP2315872B1 EP09780680A EP09780680A EP2315872B1 EP 2315872 B1 EP2315872 B1 EP 2315872B1 EP 09780680 A EP09780680 A EP 09780680A EP 09780680 A EP09780680 A EP 09780680A EP 2315872 B1 EP2315872 B1 EP 2315872B1
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EP
European Patent Office
Prior art keywords
paper web
transmitter
wave
reflector
drying
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Active
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EP09780680A
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German (de)
French (fr)
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EP2315872A1 (en
Inventor
Thomas Ehben
Jürgen MIELKE
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Siemens AG
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Siemens AG
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Publication of EP2315872A1 publication Critical patent/EP2315872A1/en
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    • 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
    • D21F5/16—Drying webs by electrical heating
    • D21F5/165—Inductive heating; Capacitive heating
    • 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
    • D21F5/16—Drying webs by electrical heating
    • D21F5/167—Microwave heating

Definitions

  • the invention relates to a method and a device for drying a paper web.
  • Such a method or device is used in the field of papermaking. Drying is an important sub-process in papermaking. The drying process is due to the production of the paper by settling of fibers from aqueous solution.
  • the drying is done so far in a dryer section, an important part of paper machines.
  • the paper In the dryer section, the paper is fed as a running band around several rotating drums, the so-called Yankee cylinders. Hot steam conducted through these drums heats the surface thereof and the parts of the paper web in contact therewith. This evaporates water in the paper.
  • This method is associated with a high mechanical complexity. The thermal efficiency is low because of the residual heat contained in the steam. In addition, the space required by dryer sections is considerable.
  • a method and an apparatus for electromagnetic drying are known in which the fibrous web is exposed to electromagnetic waves in the form of microwaves and / or high-frequency waves. This is essentially achieved by passing the fibrous web past at least one microwave transmitter and / or at least two electrodes of different polarity connected to a radio-frequency source.
  • the invention has for its object to provide a method or a device by means of which or the efficiency in the drying of a paper web is improved.
  • This object is achieved by a method for the electromagnetic drying of a paper web, wherein at least one transmitter generates an electromagnetic alternating field between the at least one transmitter and at least one reflector and the paper web is guided through at least two drums at least once through the alternating field, wherein as the alternating field standing wave is generated and wherein the paper web is passed at least once through a wave belly of the standing wave.
  • the object is further achieved by a device for the electromagnetic drying of a paper web with at least a transmitter, by means of which an electromagnetic alternating field between this and at least one reflector can be generated, and at least two drums which are arranged such that the paper web is at least once feasible by the alternating field, wherein a standing wave can be generated as an alternating field and wherein the paper web at least once by a wave belly of the standing waves is feasible.
  • the drying of the paper web is effected by an electromagnetic alternating field, steam is no longer required for the paper drying, so that all components for steam generation and guidance in the paper machine can be dispensed with.
  • the apparatus construction is relatively simple and compact.
  • the components required for wave generation can be derived from proven microwave and radar technology.
  • the electronics for field generation and control takes up very little space.
  • the entire dryer section can be made more compact, since high energy densities can be achieved by using high field strengths.
  • the energy efficiency is very high in the proposed method, since no energy-absorbing medium is heated except for the water in the paper.
  • the process is particularly gentle on paper as it only very selectively heats the water in the paper.
  • the efficiency compared to a solution without a reflector can be increased even further, since the emitted energy from the transmitter, unless it is absorbed by the water contained in the paper web , is reflected at least once and thus again contributes to the alternating field.
  • At least one transmitter simultaneously acts as a reflector.
  • the wavelength of the standing wave is adjusted so that it corresponds to an integer multiple of the drum spacing in the wave propagation direction, wherein the drums are arranged relative to the at least one transmitter and the at least one reflector so that the paper web in the region of the antinodes (Wave mountains) runs.
  • FIG. 1 shows a device for the electromagnetic drying of a paper web 1, which passes through an electromagnetic alternating field 3 as an initially wet tape several times. Due to the absorption of radiant energy by the water in the paper 1 this is heated and evaporated or evaporated. Dry paper 1 remains, which hardly absorbs radiation energy, whereby the process is particularly selective and thus paper-friendly.
  • the paper web 1 extends between an electromagnetic transmitter 2 and a reflector 4, which together produce a standing wave 3.
  • the wavelength is advantageously set to correspond to an integer multiple of the drum spacing in the wave propagation direction.
  • the drums 5 are arranged relative to transmitter 2 and reflector 4 so that the paper web 1 in the range of wave crests (Wellenbäuchen) runs.
  • the energy efficiency is very high in the inventive method, since in addition to the water in the paper 1, no energy-absorbing medium is heated.
  • the ratio between applied field strength and energy absorption is optimal. It hardly comes to an unwanted electromagnetic radiation.
  • FIG. 2 shows a device for the electromagnetic drying of a paper web 1, which is the same structure as in FIG. 1 illustrated device. Only instead of the reflector 4 in the previous figure, a second transmitter 6 is installed, which also acts as a reflector 6. In this way, the energy density in the alternating electromagnetic field can be increased.
  • a second transmitter 6 is installed, which also acts as a reflector 6.
  • the "normal" transmitter 2 is designed to be reflective is particularly advantageous.
  • FIG. 1 For an explanation of the other reference numbers, see FIG. 1 ,
  • the invention relates to a method and an apparatus for drying a paper web.
  • a method or a device in which or at least one transmitter generates an alternating electromagnetic field and the paper web is guided at least once through the alternating field.
  • a standing wave is generated as an alternating field and the paper web passed at least once through a wave belly of the standing wave.
  • the energy efficiency is in the proposed method very high, because apart from the water in the paper no energy-absorbing medium is heated.

Landscapes

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

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Trocknung einer Papierbahn.The invention relates to a method and a device for drying a paper web.

Ein derartiges Verfahren bzw. eine derartige Vorrichtung kommt auf dem Gebiet der Papierherstellung zum Einsatz. Bei der Papierherstellung ist die Trocknung ein wichtiger Teilprozess. Die Trocknung ist verfahrenstechnisch bedingt wegen der Herstellung des Papiers durch Absetzen von Fasern aus wässriger Lösung.Such a method or device is used in the field of papermaking. Drying is an important sub-process in papermaking. The drying process is due to the production of the paper by settling of fibers from aqueous solution.

Die Trocknung erfolgt bisher in einer Trockenpartie, einem wichtigen Bestandteil von Papiermaschinen. In der Trockenpartie wird das Papier als laufendes Band um mehrere rotierende Trommeln geleitet, die so genannten Yankee-Zylinder. Durch diese Trommeln geleiteter heißer Dampf erwärmt dabei deren Oberfläche und die damit in Kontakt befindlichen Teile der Papierbahn. Dadurch verdampft im Papier befindliches Wasser. Dieses Verfahren ist mit einem hohen maschinellen Aufwand verbunden. Der thermische Wirkungsgrad ist wegen der im Dampf enthaltenen Restwärme gering. Außerdem ist der Platzbedarf von Trockenpartien erheblich.The drying is done so far in a dryer section, an important part of paper machines. In the dryer section, the paper is fed as a running band around several rotating drums, the so-called Yankee cylinders. Hot steam conducted through these drums heats the surface thereof and the parts of the paper web in contact therewith. This evaporates water in the paper. This method is associated with a high mechanical complexity. The thermal efficiency is low because of the residual heat contained in the steam. In addition, the space required by dryer sections is considerable.

Aus der DE 198 41 638 A1 sind ein Verfahren und eine Vorrichtung zur elektromagnetischen Trocknung bekannt, bei denen die Faserstoffbahn elektromagnetischen Wellen in Form von Mikrowellen und/oder Hochfrequenzwellen ausgesetzt wird. Dies erfolgt im Wesentlichen dadurch, dass die Faserstoffbahn an zumindest einem Mikrowellen-Sender und/oder an zumindest zwei mit einer Hochfrequenz-Quelle verbundenen Elektroden unterschiedlicher Polarität vorbeigeführt wird.From the DE 198 41 638 A1 For example, a method and an apparatus for electromagnetic drying are known in which the fibrous web is exposed to electromagnetic waves in the form of microwaves and / or high-frequency waves. This is essentially achieved by passing the fibrous web past at least one microwave transmitter and / or at least two electrodes of different polarity connected to a radio-frequency source.

Aus der DE 26 56 551 A1 ist eine Hochfrequenztrocknungsanlage zum Trocknen von fortlaufenden Papierbahnen mit Papierleit- und Umlenkwalzen bekannt, die die bekannten Trocknungsanlagen dahingehend verbessert, dass die Walzen in Lagern aus elektrisch nicht leitendem Material gehalten sind.From the DE 26 56 551 A1 is a high-frequency drying plant for drying of continuous paper webs with Papierleit- and deflection rollers known, the known drying equipment improved in that the rollers are held in bearings made of electrically non-conductive material.

In US 4 283 862 wird ein Verfahren beschrieben, bei dem die Stoffbahn um einen Zylinder geführt wird, der in der Nähe seiner nicht-leitenden Oberfläche jeweils in seinem Inneren und außerhalb abwechselnd größere und kleinere Elektroden aufweist, um ein ungleichförmiges elektrostatisches Feld oder ein hochfrequentes Wechselfeld zur Trocknung der Stoffbahn zu erzeugen.In US 4,283,862 describes a method in which the fabric is passed around a cylinder having alternately larger and smaller electrodes in the vicinity of its non-conductive surface in each case inside and outside, to a non-uniform electrostatic field or a high-frequency alternating field for drying the fabric to create.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bzw. eine Vorrichtung anzugeben, mittels dem bzw. der der Wirkungsgrad bei der Trocknung einer Papierbahn verbessert wird.The invention has for its object to provide a method or a device by means of which or the efficiency in the drying of a paper web is improved.

Diese Aufgabe wird gelöst durch ein Verfahren zur elektromagnetischen Trocknung einer Papierbahn, wobei von zumindest einem Sender ein elektromagnetisches Wechselfeld zwischen dem zumindest einen Sender und zumindest einem Reflektor erzeugt und die Papierbahn durch zumindest zwei Trommeln zumindest einmal durch das Wechselfeld geführt wird, wobei als Wechselfeld eine stehende Welle erzeugt wird und wobei die Papierbahn zumindest einmal durch einen Wellenbauch der stehenden Welle geführt wird.This object is achieved by a method for the electromagnetic drying of a paper web, wherein at least one transmitter generates an electromagnetic alternating field between the at least one transmitter and at least one reflector and the paper web is guided through at least two drums at least once through the alternating field, wherein as the alternating field standing wave is generated and wherein the paper web is passed at least once through a wave belly of the standing wave.

Die Aufgabe wird weiter gelöst durch eine Vorrichtung zur elektromagnetischen Trocknung einer Papierbahn mit zumindest einem Sender, mittels dem ein elektromagnetisches Wechselfeld zwischen diesem und zumindest einem Reflektor erzeugbar ist, und zumindest zwei Trommeln, die derart angeordnet sind, dass die Papierbahn zumindest einmal durch das Wechselfeld führbar ist, wobei als Wechselfeld eine stehende Welle erzeugbar ist und wobei die Papierbahn zumindest einmal durch einen Wellenbauch der stehenden Wellen führbar ist.The object is further achieved by a device for the electromagnetic drying of a paper web with at least a transmitter, by means of which an electromagnetic alternating field between this and at least one reflector can be generated, and at least two drums which are arranged such that the paper web is at least once feasible by the alternating field, wherein a standing wave can be generated as an alternating field and wherein the paper web at least once by a wave belly of the standing waves is feasible.

Dadurch, dass bei der erfindungsgemäßen Lösung die Trocknung der Papierbahn durch ein elektromagnetisches Wechselfeld erfolgt, ist für die Papiertrocknung kein Dampf mehr erforderlich, so dass sämtliche Komponenten zur Dampferzeugung und - führung in der Papiermaschine entfallen können. Der apparative Aufbau ist relativ einfach und kompakt realisierbar. Die für die Wellenerzeugung erforderlichen Komponenten lassen sich aus der bewährten Mikrowellen- und Radartechnik ableiten. Die Elektronik für Felderzeugung und -steuerung nimmt nur sehr wenig Platz in Anspruch. Außerdem kann die gesamte Trockenpartie kompakter aufgebaut werden, da sich durch die Verwendung hoher Feldstärken hohe Energiedichten erreichen lassen. Der energetische Wirkungsgrad ist beim vorgeschlagenen Verfahren sehr hoch, da außer dem Wasser im Papier kein energieabsorbierendes Medium erwärmt wird. Das Verfahren ist besonders papierschonend, da es nur sehr selektiv das Wasser im Papier erwärmt.Due to the fact that in the solution according to the invention the drying of the paper web is effected by an electromagnetic alternating field, steam is no longer required for the paper drying, so that all components for steam generation and guidance in the paper machine can be dispensed with. The apparatus construction is relatively simple and compact. The components required for wave generation can be derived from proven microwave and radar technology. The electronics for field generation and control takes up very little space. In addition, the entire dryer section can be made more compact, since high energy densities can be achieved by using high field strengths. The energy efficiency is very high in the proposed method, since no energy-absorbing medium is heated except for the water in the paper. The process is particularly gentle on paper as it only very selectively heats the water in the paper.

Dadurch, dass das Wechselfeld zwischen dem zumindest einen Sender und zumindest einem Reflektor erzeugt wird, kann der Wirkungsgrad im Vergleich zu einer Lösung ohne Reflektor noch weiter erhöht werden, da die vom Sender ausgestrahlte Energie, soweit sie nicht vom in der Papierbahn enthaltenen Wasser absorbiert wird, zumindest einmal reflektiert wird und somit erneut zum Wechselfeld beiträgt.The fact that the alternating field is generated between the at least one transmitter and at least one reflector, the efficiency compared to a solution without a reflector can be increased even further, since the emitted energy from the transmitter, unless it is absorbed by the water contained in the paper web , is reflected at least once and thus again contributes to the alternating field.

In einer vorteilhaften Form der Ausgestaltung wirkt zumindest ein Sender zugleich als Reflektor. Hierdurch wird der apparative Aufbau weiter vereinfacht.In an advantageous embodiment of the embodiment, at least one transmitter simultaneously acts as a reflector. As a result, the apparatus construction is further simplified.

In einer weiteren vorteilhaften Ausführungsform wird die Wellenlänge der stehenden Welle so eingestellt, dass sie einem ganzzahligen Vielfachen des Trommelabstands in Wellenausbreitungsrichtung entspricht, wobei die Trommeln relativ zu dem zumindest einen Sender und dem zumindest einen Reflektor so angeordnet werden, dass die Papierbahn im Bereich der Wellenbäuche (Wellenberge) verläuft. Durch die Verwendung einer stehenden Welle und die Platzierung des Papiers in den Wellenbäuchen ist das Verhältnis zwischen aufgewendeter Feldstärke und Energieabsorption optimal.In a further advantageous embodiment, the wavelength of the standing wave is adjusted so that it corresponds to an integer multiple of the drum spacing in the wave propagation direction, wherein the drums are arranged relative to the at least one transmitter and the at least one reflector so that the paper web in the region of the antinodes (Wave mountains) runs. By using a standing wave and placing the paper in the antinodes, the ratio between applied field strength and energy absorption is optimal.

Im Folgenden wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen:

FIG 1
eine Vorrichtung zur elektromagnetischen Papiertrocknung, bei der die Papierbahn in den Wellenbäuchen einer durch einen Sender und einen Reflektor erzeugten stehenden Welle geführt wird,
FIG 2
eine Vorrichtung zur elektromagnetischen Papiertrocknung, bei der die Papierbahn in den Wellenbäuchen einer durch zwei zugleich reflektierende Sender erzeugten stehenden Welle geführt wird.
In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Show it:
FIG. 1
an apparatus for electromagnetic paper drying in which the paper web is guided in the antinodes of a standing wave generated by a transmitter and a reflector,
FIG. 2
a device for electromagnetic paper drying, in which the paper web is guided in the antinodes of a standing wave generated by two simultaneously reflecting transmitter.

FIG 1 zeigt eine Vorrichtung zur elektromagnetischen Trocknung einer Papierbahn 1, die als anfangs nasses Band mehrfach ein elektromagnetisches Wechselfeld 3 durchläuft. Durch die Absorption von Strahlungsenergie durch das Wasser im Papier 1 wird dieses erwärmt und verdunstet bzw. verdampft. Trockenes Papier 1 bleibt zurück, das kaum Strahlungsenergie absorbiert, wodurch das Verfahren besonders selektiv und damit papierschonend ist. FIG. 1 shows a device for the electromagnetic drying of a paper web 1, which passes through an electromagnetic alternating field 3 as an initially wet tape several times. Due to the absorption of radiant energy by the water in the paper 1 this is heated and evaporated or evaporated. Dry paper 1 remains, which hardly absorbs radiation energy, whereby the process is particularly selective and thus paper-friendly.

Die Papierbahn 1 verläuft zwischen einem elektromagnetischen Sender 2 und einem Reflektor 4, die gemeinsam eine stehende Welle 3 erzeugen. Die Wellenlänge wird vorteilhafterweise so eingestellt, dass sie einem ganzzahligen Vielfachen des Trommelabstands in Wellenausbreitungsrichtung entspricht. Die Trommeln 5 werden relativ zu Sender 2 und Reflektor 4 so angeordnet, dass die Papierbahn 1 im Bereich von Wellenbergen (Wellenbäuchen) verläuft.Der energetische Wirkungsgrad ist beim erfindungsgemäßen Verfahren sehr hoch, da außer dem Wasser im Papier 1 kein energieabsorbierendes Medium erwärmt wird. Durch die Verwendung einer stehenden Welle 3 und die Platzierung des Papiers 1 in den Wellenbäuchen ist das Verhältnis zwischen aufgewendeter Feldstärke und Energieabsorption optimal. Dabei kommt es kaum zu einer unerwünschten elektromagnetischen Abstrahlung.The paper web 1 extends between an electromagnetic transmitter 2 and a reflector 4, which together produce a standing wave 3. The wavelength is advantageously set to correspond to an integer multiple of the drum spacing in the wave propagation direction. The drums 5 are arranged relative to transmitter 2 and reflector 4 so that the paper web 1 in the range of wave crests (Wellenbäuchen) runs. The energy efficiency is very high in the inventive method, since in addition to the water in the paper 1, no energy-absorbing medium is heated. By using a standing wave 3 and the placement of the paper 1 in the antinodes the ratio between applied field strength and energy absorption is optimal. It hardly comes to an unwanted electromagnetic radiation.

FIG 2 zeigt eine Vorrichtung zur elektromagnetischen Trocknung einer Papierbahn 1, die gleich aufgebaut ist wie die in FIG. 1 dargestellte Vorrichtung. Lediglich anstelle des Reflektors 4 in der vorherigen Figur ist ein zweiter Sender 6 eingebaut, der zugleich als Reflektor 6 fungiert. Auf diese Weise kann die Energiedichte im elektromagnetischen Wechselfeld erhöht werden. Besonders vorteilhaft ist dafür eine Ausführungsform (nicht dargestellt), bei der auch der "normale" Sender 2 reflektierend ausgebildet ist. Für eine Erläuterung der weiteren Bezugszeichen siehe unter FIG 1. FIG. 2 shows a device for the electromagnetic drying of a paper web 1, which is the same structure as in FIG. 1 illustrated device. Only instead of the reflector 4 in the previous figure, a second transmitter 6 is installed, which also acts as a reflector 6. In this way, the energy density in the alternating electromagnetic field can be increased. For this purpose, an embodiment (not shown) in which the "normal" transmitter 2 is designed to be reflective is particularly advantageous. For an explanation of the other reference numbers, see FIG. 1 ,

Zusammenfassend betrifft die Erfindung ein Verfahren und eine Vorrichtung zur Trocknung einer Papierbahn. Um den Wirkungsgrad bei der Trocknung einer Papierbahn zu verbessern, wird ein Verfahren bzw. eine Vorrichtung vorgeschlagen, bei dem bzw. der von zumindest einem Sender ein elektromagnetisches Wechselfeld erzeugt und die Papierbahn zumindest einmal durch das Wechselfeld geführt wird. Dabei wird als Wechselfeld eine stehende Welle erzeugt und die Papierbahn zumindest einmal durch einen Wellenbauch der stehenden Welle geführt. Der energetische Wirkungsgrad ist beim vorgeschlagenen Verfahren sehr hoch, da außer dem Wasser im Papier kein energieabsorbierendes Medium erwärmt wird.In summary, the invention relates to a method and an apparatus for drying a paper web. In order to improve the efficiency in the drying of a paper web, a method or a device is proposed, in which or at least one transmitter generates an alternating electromagnetic field and the paper web is guided at least once through the alternating field. In this case, a standing wave is generated as an alternating field and the paper web passed at least once through a wave belly of the standing wave. The energy efficiency is in the proposed method very high, because apart from the water in the paper no energy-absorbing medium is heated.

Claims (6)

  1. Method for the electromagnetic drying of a paper web (1), an alternating electromagnetic field (3) being generated by at least one transmitter (2, 6) between the at least one transmitter (2, 6) and at least one reflector (4, 6) and the paper web (1) being fed through the alternating field (3) at least once by at least two drums (5), a standing wave being generated as an alternating field (3) and the paper web (1) being fed at least once through a wave loop of the standing wave (3).
  2. Method according to claim 1,
    at least one transmitter (6) acting simultaneously as a reflector (6).
  3. Method according to claim 1 or 2,
    the wavelength of the standing wave (3) being set such that it corresponds to an integer multiple of the drum spacing in the wave propagation direction, the drums (5) being disposed relative to the at least one transmitter (2, 6) and the at least one reflector (4, 6) such that the paper web (1) proceeds in the region of the wave loops (wave crests).
  4. Device for the electromagnetic drying of a paper web (1) with at least one transmitter (2, 6), by means of which an alternating electromagnetic field (3) can be generated between said transmitter (2, 6) and at least one reflector (4, 6), and at least two drums (5) which are disposed such that the paper web (1) can be fed at least once through the alternating field (3),
    characterised in that a standing wave can be generated as an alternating field (3) and that the paper web (1) can be fed at least once through a wave loop of the standing wave (3).
  5. Device according to claim 4,
    at least one transmitter (6) being simultaneously embodied as a reflector (6).
  6. Device according to claim 4 or 5,
    it being possible to set the wavelength of the standing wave (3) such that it corresponds to an integer multiple of the drum spacing in the wave propagation direction, the drums (5) being disposed relative to the at least one transmitter (2, 6) and the at least one reflector (4, 6) such that the paper web (1) proceeds in the region of the wave loops (wave crests).
EP09780680A 2008-08-18 2009-07-16 Method and device for drying a paper web Active EP2315872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810038215 DE102008038215A1 (en) 2008-08-18 2008-08-18 Method and device for drying a paper web
PCT/EP2009/059119 WO2010020485A1 (en) 2008-08-18 2009-07-16 Method and device for drying a paper web

Publications (2)

Publication Number Publication Date
EP2315872A1 EP2315872A1 (en) 2011-05-04
EP2315872B1 true EP2315872B1 (en) 2013-03-27

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EP09780680A Active EP2315872B1 (en) 2008-08-18 2009-07-16 Method and device for drying a paper web

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EP (1) EP2315872B1 (en)
DE (1) DE102008038215A1 (en)
ES (1) ES2402565T3 (en)
WO (1) WO2010020485A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570549A1 (en) 2011-09-13 2013-03-20 Quantum Technologie GmbH Roller for heating a web of paper or fabric
CN106766792A (en) * 2016-12-14 2017-05-31 芜湖市天申新材料科技有限公司 A kind of Packaging Box machining production line continuous dryer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283862A (en) * 1972-06-16 1981-08-18 Candor James T Electrostatic method and apparatus for treating material
DE2656551A1 (en) * 1976-12-14 1978-06-15 Scheufelen Papierfab HF paper web drier - has guide rollers supported by bearings with races made of ceramics or plastics material and balls made of glass
DE3130358A1 (en) * 1981-07-31 1983-02-17 Agfa-Gevaert Ag, 5090 Leverkusen DEVICE FOR HEATING AND / OR DRYING CONTINUOUS AREA MATERIALS WITH MICROWAVES
DE19841638A1 (en) * 1998-09-11 2000-03-16 Voith Sulzer Papiertech Patent Moisture profiling

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ES2402565T3 (en) 2013-05-06
EP2315872A1 (en) 2011-05-04
WO2010020485A1 (en) 2010-02-25
DE102008038215A1 (en) 2010-02-25

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