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EP1612328B2 - Apparatus for continuous drying of a fibre web - Google Patents
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EP1612328B2 - Apparatus for continuous drying of a fibre web - Google Patents

Apparatus for continuous drying of a fibre web Download PDF

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Publication number
EP1612328B2
EP1612328B2 EP05012495A EP05012495A EP1612328B2 EP 1612328 B2 EP1612328 B2 EP 1612328B2 EP 05012495 A EP05012495 A EP 05012495A EP 05012495 A EP05012495 A EP 05012495A EP 1612328 B2 EP1612328 B2 EP 1612328B2
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EP
European Patent Office
Prior art keywords
cylinder shell
honeycombed
profile
drum
designed
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Expired - Lifetime
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EP05012495A
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German (de)
French (fr)
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EP1612328B1 (en
EP1612328A1 (en
Inventor
Wilhelm Dipl.-Ing. Mausser
Gerald Ing. Schadler
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Andritz AG
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Andritz AG
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Publication of EP1612328B1 publication Critical patent/EP1612328B1/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
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders

Definitions

  • the invention relates to a device for continuously drying a fibrous web, in particular tissue web with a drying drum and an air circuit, wherein the drying drum has a cylinder jacket, which is formed as a honeycomb-shaped body.
  • a device for continuously drying a fibrous web, in particular tissue web with a drying drum and an air circuit wherein the drying drum has a cylinder jacket, which is formed as a honeycomb-shaped body.
  • Such a device is from the document EP-A-0 315 961 known.
  • the drying process begins at an entry dry content of the tissue web of about 40% to 45%.
  • the mechanical pre-dewatering In order to achieve a higher volume of the paper is dispensed with the mechanical pre-dewatering and the initial dry content of such devices is today at about 20% to 25%.
  • These systems work with throughflow drying.
  • one or more flow through drums connected in series which have room temperature, are abruptly exposed to the supply air temperature of approx. 300 ° C.
  • Drying drums currently in use consist of thin-walled shell constructions, for example as perforated metal sheets or as honeycomb-shaped bodies, which are connected to thick-walled end flanges.
  • the invention now wants to eliminate this disadvantage. It is inventively characterized in that the honeycomb-shaped cylinder jacket of the drying drum is provided at its edges with an annular flexible transition profile, wherein the transition profile is designed as a U-profile.
  • U-profile designed as a transition profile profile is designed as a U-profile and preferably butt welded to the honeycomb-shaped cylinder jacket.
  • the special type of connection causes the stresses in the welds to be reduced so much that no deformation or even mechanical damage occurs at the welds.
  • a favorable embodiment of the invention is characterized in that the cross-section of the transition profile designed as a U-profile decreases towards its center. As a result, the heat flow can be influenced particularly well. It is produced with this design, a flexible connection, which also ensures the same centering of the cylinder jacket and thus an exact roundness.
  • honeycomb-shaped cylinder jacket is wider than the paper web to be dried, which allows a defined variation of the paper web width.
  • a favorable development of the invention is characterized in that at the edges in each case an endless ring is shrunk, which extends beyond the transition profile in the honeycomb-shaped cylinder jacket. This prevents penetration of dust or fibers into the cavity of the U-profile
  • the cylinder jacket consists of longitudinal ribs which are connected to vertical, folded profiles. As a result, a high stability of the cylinder jacket can be achieved.
  • a favorable embodiment of the invention is characterized in that the longitudinal ribs of the honeycomb-shaped cylinder jacket are arranged at a distance of between 20 and 80 mm, preferably between 30 and 40 mm. By a small distance results in a lower specific load and thus a reduction in the risk of marks on the paper web.
  • An advantageous embodiment of the invention is characterized in that the honeycomb-shaped, folded connecting profiles protrude in the radial direction over the longitudinal ribs and carry the paper web and the transport screen. This results in a large contact surface and a further reduction in the risk of markings of the paper web.
  • honeycomb-shaped cylinder jacket has an open area of at least 85%. This allows the fürströmtrocknungsrea perform particularly well.
  • a particularly favorable development of the invention is characterized in that covers are provided for stabilizing the cylinder jacket on the end faces, which are screwed to the cylinder jacket, in particular to the transition pieces.
  • This design ensures improved stability of the drum shell, in particular, a sliding between the lid and drum shell is prevented in a radial expansion due to the temperature.
  • An advantageous embodiment of the invention is characterized in that the drying drum has an exclusively welded drum body. This design virtually eliminates the areas where cracks could occur.
  • Fig. 1 a variant of an arrangement of a through-flow drying
  • Fig. 2 a cut through Fig. 1 along line II-II
  • Fig. 3 a drying drum according to the invention
  • Fig. 4 Detail IV in Fig. 3
  • Fig. 5 Detail V in Fig. 3
  • Fig. 6 a section according to line VI - VI in Fig. 3 represents.
  • Fig. 1 is a possible arrangement of a modströmtrocknung shown. It can be seen here the drum 1 with its bearings 2 and 3, and the drive 4. Under the drum is a two-piece hood 5 and 6 (see Fig. 2 ), from which the hot supply air through the paper web 7, a transport screen 8, then flows through the drying drum 1 into the interior of the drum, and is withdrawn via an annular channel 10 from the drum to the drive side. The approximately 300 ° C hot air is cooled by the drying process to about 120 ° C. This so cooled exhaust air is brought back to the entry state in a treatment system. At the end, the paper web 7 is guided with the transport screen 8 via a deflection roller 11.
  • the covering device 12 which covers the area of the drum 1 from the inside in the area which is not touched by the tissue web 7 and which is not wrapped by the hood 5 and 6.
  • the air can also be guided from the interior of the drying drum 1 through the cylinder jacket 9 to the outside.
  • Fig. 3 shows a section through a drying drum 1, consisting of a honeycomb-shaped cylinder jacket 9 with leader and drive side each welded with butt welds, flexible, rolled to a lying U-profile ring 13.
  • the outer flanges of these flexible rings 13 are screwed to the drum lids 14 and 15, the pins for receiving the two bearings 2 and 3, which bear in their execution of the change in length of the drying drum 1 by the temperature differences during heating and cooling in the cross machine direction.
  • the temperature of the exhaust air is usually about 120 ° C while the supply air into the drying drum has about 300 ° C.
  • the two drum edges are covered from the outside to the edges of the paper web with an endless ring 16, and it is thus prevents ingress of dust or fibers into the cavity of the U-profile.
  • This endless ring 16 is shrunk in such a way that it can not detach itself from the drum surface during heating, cooling or operation.
  • Fig. 4 shows a section through the connections sheath - flexible ring 13 and the welded joint thereof and the Flanschverschraubung 17 with the drum cover. 4
  • Fig. 5 is a view of the edge region of the drum 1 is shown. Here you can see the cover 16, which extends beyond the edges of the honeycomb cylinder jacket 9 and marks the edges of the paper.
  • Fig. 6 shows the support structure of the cylinder jacket 9 with longitudinal ribs 18 advantageously at a distance a of about 30 to 40 mm and the radially projecting beyond connecting profiles 19 which form the honeycomb shape and the paper web 7 and the support wire 8 carry.

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

Description

Die Erfindung betrifft eine Vorrichtung zum kontinuierlichen Trocknen einer Faserstoffbahn, insbesondere Tissuebahn mit einer Trockentrommel und einem Luftkreislauf, wobei die Trockentrommel einen Zylindermantel hat, der als wabenförmiger Körper ausgebildet ist. Eine derartige Vorrichtung ist aus dem Dokument EP-A-0 315 961 bekannt.The invention relates to a device for continuously drying a fibrous web, in particular tissue web with a drying drum and an air circuit, wherein the drying drum has a cylinder jacket, which is formed as a honeycomb-shaped body. Such a device is from the document EP-A-0 315 961 known.

Bei konventionellen Tissueanlagen beginnt der Trocknungsprozess bei einem Eintrittstrockengehalt der Tissuebahn von ca. 40% bis 45%. Um ein höheres Volumen des Papiers zu erreichen wird auf die mechanische Vorentwässerung verzichtet und der Eingangstrockengehalt derartiger Vorrichtungen liegt heute bei ca. 20% bis 25%. Diese Anlagen arbeiten mit einer Durchströmtrocknung. Beim Aufheizvorgang werden eine oder mehrere hintereinandergeschaltete Durchströmtrockentrommeln, die Raumtemperatur haben, schlagartig der Zulufttemperatur von ca. 300 ° C ausgesetzt. Derzeit im Einsatz befindliche Trocknungstrommeln bestehen aus dünnwandigen Mantelkonstruktionen, beispielsweise als Lochblech oder als wabenförmiger Körper, die mit dickwandigen Endflanschen verbunden sind. Durch die großen Massenunterschiede zwischen Trommelmantel und Endflansch kommt es an deren Übergangsstelle zu überhöhten Spannungen, die zu Deformationen und sogar Zerstörungen führen. Dieselben Beschädigungen treten auf, wenn die Trommeln von Betriebstemperatur schlagartig auf Raumtemperatur abgekühlt werden, und zwar durch Bespritzen mit kaltem Wasser im Falle eines Notstops, um die die Trommeln umschlingenden Kunststoffsiebe vor Zerstörung zu schützen.In conventional tissue systems, the drying process begins at an entry dry content of the tissue web of about 40% to 45%. In order to achieve a higher volume of the paper is dispensed with the mechanical pre-dewatering and the initial dry content of such devices is today at about 20% to 25%. These systems work with throughflow drying. During the heating process, one or more flow through drums connected in series, which have room temperature, are abruptly exposed to the supply air temperature of approx. 300 ° C. Drying drums currently in use consist of thin-walled shell constructions, for example as perforated metal sheets or as honeycomb-shaped bodies, which are connected to thick-walled end flanges. Due to the large differences in mass between the drum shell and the end flange, excessive stresses occur at their point of transition which lead to deformation and even destruction. The same damage occurs when the drums are abruptly cooled to room temperature from operating temperature, by spraying with cold water in the event of an emergency stop, to protect the drums wrapping plastic screens from destruction.

Die Erfindung will nun diesen Nachteil beseitigen. Sie ist erfindungsgemäß dadurch gekennzeichnet, dass der wabenförmige Zylindermantel der Trockentrommel an seinen Rändern mit einem ringförmigen flexiblen Übergangsprofil versehen ist, wobei das Übergangsprofil als U-Profil ausgeführt ist. Durch diese Art der Ausbildung des Übergangsstückes wird sowohl beim Aufheizen, als auch beim Abkühlen der Maschine ein kontinuierlicher Wärmeübergang gewährleistet. Dadurch lassen sich auftretende Durchmesserveränderungen und in weiterer Folge unzulässige Wärmespannungen reduzieren.The invention now wants to eliminate this disadvantage. It is inventively characterized in that the honeycomb-shaped cylinder jacket of the drying drum is provided at its edges with an annular flexible transition profile, wherein the transition profile is designed as a U-profile. By this type of training of the transition piece, a continuous heat transfer is ensured both during heating, as well as when cooling the machine. As a result, occurring diameter changes and subsequently unacceptable thermal stresses can be reduced.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass das als U-Profil ausgeführte Übergangsprofil als U-Profil ausgeführt und vorzugsweise stumpf an den wabenförmigen Zylindermantel angeschweißt ist. Die spezielle Art der Verbindung führt dazu, dass die Spannungen in den Schweißnähten soweit herabgesetzt werden, dass es zu keinerlei Deformationen oder sogar mechanischen Schäden an den Schweißnähten kommt.An advantageous development of the invention is characterized in that the U-profile designed as a transition profile profile is designed as a U-profile and preferably butt welded to the honeycomb-shaped cylinder jacket. The special type of connection causes the stresses in the welds to be reduced so much that no deformation or even mechanical damage occurs at the welds.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass der Querschnitt des als U-Profil ausgeführten Übergangsprofils zu seiner Mitte hin abnimmt. Dadurch kann der Wärmefluss besonders gut beeinflusst werden. Es wird mit dieser Ausführung auch eine flexible Verbindung erzeugt, welche zudem eine Zentrierung des Zylindermantels und damit eine exakte Rundheit desselben gewährleistet.A favorable embodiment of the invention is characterized in that the cross-section of the transition profile designed as a U-profile decreases towards its center. As a result, the heat flow can be influenced particularly well. It is produced with this design, a flexible connection, which also ensures the same centering of the cylinder jacket and thus an exact roundness.

Vorteilhaft ist es, wenn der wabenförmige Zylindermantel breiter als die zu trocknende Papierbahn ist, was eine definierte Variation der Papierbahnbreite erlaubt.It is advantageous if the honeycomb-shaped cylinder jacket is wider than the paper web to be dried, which allows a defined variation of the paper web width.

Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass an den Rändern jeweils ein endloser Ring aufgeschrumpft ist, der über das Übergangsprofil in den wabenförmigen Zylindermantel hinausreicht. Dieser verhindert so ein Eindringen von Staub oder Fasern in den Hohlraum des U- ProfilesA favorable development of the invention is characterized in that at the edges in each case an endless ring is shrunk, which extends beyond the transition profile in the honeycomb-shaped cylinder jacket. This prevents penetration of dust or fibers into the cavity of the U-profile

Günstig hat sich erwiesen, dass der Zylindermantel aus Längsrippen besteht, die mit stehenden, gekanteten Profilen verbunden sind. Dadurch kann eine hohe Stabilität des Zylindermantels erreicht werden.Conveniently, it has been found that the cylinder jacket consists of longitudinal ribs which are connected to vertical, folded profiles. As a result, a high stability of the cylinder jacket can be achieved.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die Längsrippen des wabenförmigen Zylindermantel voneinander in einem Abstand zwischen 20 und 80 mm, vorzugsweise zwischen 30 und 40 mm, angeordnet sind. Durch einen geringen Abstand ergibt sich eine geringere spezifische Belastung und damit auch eine Verringerung der Gefahr von Markierungen auf der Papierbahn.A favorable embodiment of the invention is characterized in that the longitudinal ribs of the honeycomb-shaped cylinder jacket are arranged at a distance of between 20 and 80 mm, preferably between 30 and 40 mm. By a small distance results in a lower specific load and thus a reduction in the risk of marks on the paper web.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die wabenförmig angeordneten, gekanteten Verbindungsprofile in Radialrichtung über die Längsrippen hinausragen und die Papierbahn und das Transportsieb tragen. Daraus ergibt sich eine große Auflagefläche und eine weitere Verringerung der Gefahr von Markierungen der Paperbahn.An advantageous embodiment of the invention is characterized in that the honeycomb-shaped, folded connecting profiles protrude in the radial direction over the longitudinal ribs and carry the paper web and the transport screen. This results in a large contact surface and a further reduction in the risk of markings of the paper web.

Besonders günstig ist es, wenn der wabenförmige Zylindermantel eine offene Fläche von mindestens 85 % aufweist. Damit lässt sich der Durchströmtrocknungsprozess besonders gut durchführen.It is particularly favorable if the honeycomb-shaped cylinder jacket has an open area of at least 85%. This allows the Durchströmtrocknungsprozess perform particularly well.

Eine besonders günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass zur Stabilisierung des Zylindermantels an den Stirnseiten Deckel vorgesehen sind, die mit dem Zylindermantel, insbesondere mit den Übergangsstücken, verschraubt sind. Diese Ausführung gewährleistet eine verbesserte Stabilität des Trommelmantels, insbesondere wird ein Gleiten zwischen Deckel und Trommelmantel bei einer radialen Ausdehnung aufgrund der Temperatur verhindert.A particularly favorable development of the invention is characterized in that covers are provided for stabilizing the cylinder jacket on the end faces, which are screwed to the cylinder jacket, in particular to the transition pieces. This design ensures improved stability of the drum shell, in particular, a sliding between the lid and drum shell is prevented in a radial expansion due to the temperature.

Eine vorteilhafte Ausführung der Erfindung ist dadurch gekennzeichnet, dass die Trockentrommel einen ausschließlich geschweißten Trommelkörper aufweist. Durch diese Ausführung werden die Bereiche, in denen Risse auftreten könnten, praktisch ausgeschlossen.An advantageous embodiment of the invention is characterized in that the drying drum has an exclusively welded drum body. This design virtually eliminates the areas where cracks could occur.

Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 eine Variante einer Anordnung einer Durchströmtrocknung, Fig. 2 einen Schnitt durch Fig. 1 entlang Linie II-II, Fig. 3 eine Trockentrommel gemäß der Erfindung, Fig. 4 Detail IV in Fig. 3, Fig. 5 Detail V in Fig. 3 und Fig. 6 einen Schnitt gemäß Linie VI - VI in Fig. 3 darstellt.The invention will now be described by way of example with reference to the drawings, in which: Fig. 1 a variant of an arrangement of a through-flow drying, Fig. 2 a cut through Fig. 1 along line II-II, Fig. 3 a drying drum according to the invention, Fig. 4 Detail IV in Fig. 3 . Fig. 5 Detail V in Fig. 3 and Fig. 6 a section according to line VI - VI in Fig. 3 represents.

In Fig. 1 ist eine mögliche Anordnung einer Durchströmtrocknung dargestellt. Man erkennt hier die Trommel 1 mit ihren Lagerungen 2 und 3, sowie den Antrieb 4. Unter der Trommel befindet sich eine zweiteilige Haube 5 und 6 (siehe Fig. 2), aus der die heiße Zuluft durch die Papierbahn 7, ein Transportsieb 8, sodann durch die Trockentrommel 1 ins Innere der Trommel strömt, und über einen Ringkanal 10 aus der Trommel auf die Triebseite abgezogen wird. Die ca. 300 ° C heiße Zuluft wird durch den Trocknungsprozess auf ca. 120 ° C abgekühlt . Diese so gekühlte Abluft wird in einem Aufbereitungssystem wieder auf den Eintrittszustand gebracht. Am Ablauf wird die Papierbahn 7 mit dem Transportsieb 8 über eine Umlenkwalze 11 geführt. Deutlich ist hier die Abdeckeinrichtung 12 erkennbar, die den Bereich der Trommel 1 von der Innenseite her in dem Bereich abdeckt, der nicht von der Tissuebahn 7 berührt ist und der auch nicht von der Haube 5 und 6 umschlungen ist. Somit wird verhindert, dass hier Falschluft in die Trockentrommel eingesaugt und dadurch die Saugwirkung durch die Papierbahn stark herabgesetzt wird. Grundsätzlich kann die Luft auch vom Innenraum der Trockentrommel 1 durch den Zylindermantel 9 nach außen geführt werden.In Fig. 1 is a possible arrangement of a Durchströmtrocknung shown. It can be seen here the drum 1 with its bearings 2 and 3, and the drive 4. Under the drum is a two-piece hood 5 and 6 (see Fig. 2 ), from which the hot supply air through the paper web 7, a transport screen 8, then flows through the drying drum 1 into the interior of the drum, and is withdrawn via an annular channel 10 from the drum to the drive side. The approximately 300 ° C hot air is cooled by the drying process to about 120 ° C. This so cooled exhaust air is brought back to the entry state in a treatment system. At the end, the paper web 7 is guided with the transport screen 8 via a deflection roller 11. Clearly here the covering device 12 can be seen, which covers the area of the drum 1 from the inside in the area which is not touched by the tissue web 7 and which is not wrapped by the hood 5 and 6. Thus it is prevented that here sucked false air into the drying drum and thereby the suction effect is greatly reduced by the paper web. In principle, the air can also be guided from the interior of the drying drum 1 through the cylinder jacket 9 to the outside.

Fig. 3 zeigt einen Schnitt durch eine Trockentrommel 1, bestehend aus einem wabenförmigen Zylindermantel 9 mit führer- und triebseitig jeweils einem mit Stumpfnähten angeschweißten, flexiblen, zu einem liegenden U- Profil gerollten Ring 13. Durch dieses U-förmige Übergangsprofil 13 zwischen Zylindermantel 9 und Flansch werden die maximalen Spannungen der Verbindungsschweißnaht auf ca. 1/3 derjenigen konventioneller Konstruktionen reduziert, was einen zerstörungsfreien Betrieb der Trockentrommel über die gesamte Lebensdauer garantiert. Fig. 3 shows a section through a drying drum 1, consisting of a honeycomb-shaped cylinder jacket 9 with leader and drive side each welded with butt welds, flexible, rolled to a lying U-profile ring 13. By this U-shaped transition profile 13 between the cylinder jacket 9 and flange reduces the maximum stresses of the joint weld seam to about 1/3 of that of conventional constructions, which guarantees non-destructive operation of the drying drum over its entire service life.

Die außenliegenden Flansche dieser flexiblen Ringe 13 sind mit den Trommeldeckeln 14 und 15 verschraubt, die Zapfen für die Aufnahme der beiden Lagerungen 2 und 3 haben, die in ihrer Ausführung der Längenänderung der Trockentrommel 1 durch die Temperaturunterschiede beim Aufheizen und Abkühlen in Maschinenquerrichtung Rechnung tragen. Die Temperatur der Abluft beträgt üblicherweise etwa 120 °C während die Zuluft in die Trockentrommel ca. 300 °C aufweist. Die beiden Trommelränder sind von außen her bis zu den Rändern der Papierbahn mit einem endlosen Ring 16 abgedeckt, und es wird so ein Eindringen von Staub oder Fasern in den Hohlraum des U- Profiles verhindert. Dieser endlose Ring 16 ist so aufgeschrumpft, dass er sich weder beim Aufheizen, noch Abkühlen, noch im Betrieb von der Trommeloberfläche lösen kann.The outer flanges of these flexible rings 13 are screwed to the drum lids 14 and 15, the pins for receiving the two bearings 2 and 3, which bear in their execution of the change in length of the drying drum 1 by the temperature differences during heating and cooling in the cross machine direction. The temperature of the exhaust air is usually about 120 ° C while the supply air into the drying drum has about 300 ° C. The two drum edges are covered from the outside to the edges of the paper web with an endless ring 16, and it is thus prevents ingress of dust or fibers into the cavity of the U-profile. This endless ring 16 is shrunk in such a way that it can not detach itself from the drum surface during heating, cooling or operation.

Fig. 4 zeigt einen Schnitt durch die Verbindungen Mantel - flexibler Ring 13 sowie die Schweißverbindung derselben und die Flanschverschraubung 17 mit dem Trommeldeckel 4. Fig. 4 shows a section through the connections sheath - flexible ring 13 and the welded joint thereof and the Flanschverschraubung 17 with the drum cover. 4

In Fig. 5 ist eine Ansicht des Randbereiches der Trommel 1 dargestellt. Hier sieht man den Abdeckring 16, der bis über die Ränder des wabenförmigen Zylindermantels 9 reicht und die Papierränder markiert.In Fig. 5 is a view of the edge region of the drum 1 is shown. Here you can see the cover 16, which extends beyond the edges of the honeycomb cylinder jacket 9 and marks the edges of the paper.

Fig. 6 zeigt die Tragkonstruktion des Zylindermantels 9 mit Längsrippen 18 vorteilhafterweise in einem Abstand a von ca. 30 bis 40 mm und die in Radialrichtung darüber ragenden Verbindungsprofile 19, die die Wabenform bilden und die Papierbahn 7 und das Trägersieb 8 tragen. Fig. 6 shows the support structure of the cylinder jacket 9 with longitudinal ribs 18 advantageously at a distance a of about 30 to 40 mm and the radially projecting beyond connecting profiles 19 which form the honeycomb shape and the paper web 7 and the support wire 8 carry.

Claims (11)

  1. Device for continuous drying of a pulp web, particularly a tissue web, with a drying drum (1) and an air circulating system, where the drying drum (1) has a cylinder shell (9) designed as a honeycombed body, characterised by the honeycombed cylinder shell (9) of the drying drum (1) having an annular, flexible transition profile (13) at the edges, where the transition profile (13) is designed as a U-profile.
  2. Device according to Claim 1, characterised by the transition profile (13) designed as a U-profile being butt-welded onto the honeycombed cylinder shell (9).
  3. Device according to Claim 1 or 2, characterised by the cross-section of the transition profile (13), designed as a U-profile, narrowing towards its centre.
  4. Device according to one of Claims 1 to 3, characterised by the honeycombed cylinder shell (9) being broader than the paper web to be dried.
  5. Device according to one of Claims 1 to 4, characterised by an endless ring (16) being shrunk on at the edges and which extends beyond the transition profile (13) and into the honeycombed cylinder shell (9).
  6. Device according to one of Claims 1 to 5, characterised by the cylinder shell (9) consisting of longitudinal ribs (18) that are connected to upright, bent profiles (19).
  7. Device according to one of Claims 5 or 6, characterised by the longitudinal ribs (18) of the honeycombed cylinder shell (9) being spaced at a distance (a) of between 20 and 80 mm from one another, preferably of between 30 and 40 mm.
  8. Device according to one of Claims 5 to 7, characterised by the bent connecting profiles (19) mounted in a honeycombed pattern protruding beyond the longitudinal ribs (18) in the radial direction and supporting the paper web (7) and the conveying wire (8).
  9. Device according to one of Claims 1 to 8, characterised by the honeycombed cylinder shell (9) having an open area of at least 85%.
  10. Device according to one of Claims 1 to 9, characterised by covers (14, 15) being provided on the face ends to stabilize the cylinder shell (9), these covers (14, 15) being bolted to the cylinder shell (9), particularly to the transition pieces (13).
  11. Device according to one of Claims 1 to 10, characterised by the drying drum (1) having a fully welded drum body.
EP05012495A 2004-06-28 2005-06-10 Apparatus for continuous drying of a fibre web Expired - Lifetime EP1612328B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0109504A AT413709B (en) 2004-06-28 2004-06-28 DEVICE FOR CONTINUOUS DRYING OF A FIBROUS WEB

Publications (3)

Publication Number Publication Date
EP1612328A1 EP1612328A1 (en) 2006-01-04
EP1612328B1 EP1612328B1 (en) 2008-01-02
EP1612328B2 true EP1612328B2 (en) 2010-09-22

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EP05012495A Expired - Lifetime EP1612328B2 (en) 2004-06-28 2005-06-10 Apparatus for continuous drying of a fibre web

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US (1) US7690131B2 (en)
EP (1) EP1612328B2 (en)
JP (1) JP2006009238A (en)
CN (1) CN1715557B (en)
AT (1) AT413709B (en)
AU (1) AU2005202714B2 (en)
BR (1) BRPI0502471A (en)
CA (1) CA2509870C (en)
DE (1) DE502005002375D1 (en)
MX (1) MXPA05007029A (en)

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US20050283994A1 (en) 2005-12-29
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EP1612328A1 (en) 2006-01-04
AU2005202714A1 (en) 2006-01-12
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CN1715557B (en) 2011-04-06
US7690131B2 (en) 2010-04-06
CN1715557A (en) 2006-01-04
AT413709B (en) 2006-05-15
CA2509870A1 (en) 2005-12-28
ATA10952004A (en) 2005-09-15

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