EP3405612B1 - Yankee-trockenzylinder mit dampflosem betrieb - Google Patents

Yankee-trockenzylinder mit dampflosem betrieb Download PDF

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Publication number
EP3405612B1
EP3405612B1 EP17707658.5A EP17707658A EP3405612B1 EP 3405612 B1 EP3405612 B1 EP 3405612B1 EP 17707658 A EP17707658 A EP 17707658A EP 3405612 B1 EP3405612 B1 EP 3405612B1
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EP
European Patent Office
Prior art keywords
hollow shaft
dryer cylinder
yankee dryer
flow
fixed hollow
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EP17707658.5A
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English (en)
French (fr)
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EP3405612A1 (de
Inventor
Marco Celli
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A Celli Paper SpA
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A Celli Paper SpA
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Priority to PL17707658T priority Critical patent/PL3405612T3/pl
Publication of EP3405612A1 publication Critical patent/EP3405612A1/de
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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
    • 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
    • D21F5/022—Heating the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/181—Drying webs by hot air on Yankee cylinder

Definitions

  • the present invention relates to the field of machines for producing paper and similar products and, in particular, relates to an improved structure of dryer cylinder, also known as Yankee dryer cylinder, or simply Yankee cylinder.
  • the plants for producing paper provide the use of a headbox for distributing a mixture of cellulosic fibres and water on a forming fabric, and, in some cases, additives of different kinds. In this way, a determined amount of water is drained and, then, the dry content of the mixture layer arranged on the forming fabric is increased.
  • the content of water is, then, reduced, through a sequence of passages among many fabrics and/or felts of the mixture layer, up to reach a consistency such that allows to pass through a drying section.
  • This usually comprises at least a dryer cylinder, also called “Yankee dryer cylinder”, or simply “Yankee cylinder” and a drying hood that is fed with hot air.
  • the web of treated humid paper is laid on the external surface of the Yankee cylinder, while the inside of the Yankee cylinder is heated, for example, by introducing steam.
  • the web of humid paper which is laid on the external surface, is gradually dried.
  • the web of paper is removed from the external surface of the Yankee cylinder by means of a blade, or a doctor blade, or by tensioning, depending on the desired product, and, in particular, crêpe paper, or smooth paper.
  • a Yankee cylinder comprises essentially two heads, or end walls, between which a cylindrical shell is positioned.
  • a bearing journal which is mounted, in operating conditions, on a respective bearing, is fixed to each head.
  • a hollow shaft is mounted inside the shell.
  • the heads and/or the shell are provided with inspection apertures through which at least a worker enters into the cylinder for carrying out, periodically, ordinary, or extraordinary maintenance interventions.
  • the constituent elements of the Yankee cylinder i.e. the heads, the shell, the bearing journals etc. can be obtained by iron casting and can be fixed by means of bolts.
  • the Yankee cylinders can be made of steel.
  • the two heads can be fixed to the cylindrical shell by means of screw bolts, or more frequently by means of weld beads.
  • the cylindrical shell has an internal surface provided with circumferential grooves. These are adapted to collect the condensate formed for the transfer, toward outside, of the latent heat of vaporization from the steam that has been introduced inside the Yankee cylinder.
  • thermo-elastic stresses caused by the high temperature of the steam that is introduced inside dryer cylinder.
  • the solution described in this document provides a central duct and a shell rotating about a shaft.
  • the combustion air is introduced through the duct and fed to some burners arranged, in determined positions, within the cylinder.
  • the burners therefore, produce the heat that hits the shell.
  • the exhaust fumes exit the central duct, at the opposite side of the inlet of air.
  • EP0708301A1 does not appear to be particularly advantageous. In fact, it is necessary to allocate not a little space, to the housings of the burners, of the air feed ducts, and of the discharging ducts of the burnt gases. This considerably decreases the surface available for the heat exchange, thus reducing the efficiency of the machine.
  • a further drawback of the solution described in EP0708301 is that the internal volume of the cylinder can become saturated with inflammable gases and, therefore, the flame, which is produced by the internal burners, can cause explosions and, therefore, exposing the workers to risks, besides compromising the efficacy of the plant.
  • an object of the present invention to provide a Yankee dryer cylinder that is able to solve the above disclosed drawbacks of the Yankee cylinders of prior art, and, in particular, that is able to provide a uniform heat distribution at the internal surface of the shell and, therefore, to produce a final product of high quality.
  • a Yankee dryer cylinder comprising:
  • the hot gas can be a mixture of gases.
  • the mixture of gases can be, in particular, air.
  • the temperature of the flow of hot gas can be set between 100 °C and 750 °C, advantageously set between 250 and 700 °C, preferably set between 300 °C and 600 °C.
  • the flow of hot gas can be a flow of combustion fumes having a temperature higher than 100 °C.
  • a feeding device for feeding a flow of hot air, said feeding device arranged to feed said the flow of hot air into said feeding portion of said cavity through said inlet mouth.
  • a suction device downstream of said Yankee dryer cylinder, is provided that is connected to the outlet mouth of the fixed hollow shaft.
  • the suction device is arranged to suck the flow of hot gas that is fed into the cavity of the fixed hollow shaft through the inlet mouth. In this way it is possible to assist the exit of the gas from the dryer cylinder.
  • the internal surface of the cylindrical shell provides a plurality of circumferential grooves.
  • a plurality of distributor members is provided in the internal chamber arranged to distribute the flow of hot air, which comes from said cavity of said fixed hollow shaft, on the internal surface of the shell.
  • each distributor member of the above disclosed plurality is arranged to distribute a share of flow of hot air fed into the cavity of the fixed hollow shaft, on a respective determined portion of the internal surface of the shell.
  • the distributor members are configured in such a way to define, in the internal chamber, a predetermined path for the hot air between the cavity of the feeding portion and the cavity of the discharging portion.
  • the Yankee cylinder and the fixed hollow shaft are arranged coaxially to each other.
  • each distributor member is tubular-shaped, and it is provided with at least one inlet aperture facing towards at least one feeding hole of the lateral surface of the fixed hollow shaft, and at least one distribution aperture facing towards the internal surface of the cylindrical shell.
  • the feeding aperture can be associated to a feeding panel provided with a plurality of inlet holes.
  • This technical solution in particular, is adopted in the case in which the feeding panel is arranged in front of a plurality of suction holes.
  • the above disclosed plurality of distributor members is integral to the fixed hollow shaft.
  • each distributor member is arranged in front of a predetermined number of suction holes.
  • the feeding portion is provided with a plurality of feeding holes and the discharging portion is provided with a plurality of discharging holes.
  • both the feeding holes and the discharging holes are advantageously arranged on respective rows.
  • the plurality of feeding holes and the plurality of discharging holes are distributed along all the perimeter of the fixed hollow shaft.
  • the rows, along which, the feeding holes, and the discharging holes are distributed can be oriented longitudinally to the fixed hollow shaft.
  • each distributor member can be oriented such that the respective feeding aperture is positioned on the respective row of the suction holes.
  • At least a first and a second bearing are mounted that are arranged at opposite end portions.
  • a plant for drying a humid web of paper comprises:
  • a structure of Yankee dryer cylinder 1 comprises a cylindrical shell 10 having a internal surface 11. Furthermore, a first and a second heads, or end walls, 71 and 72, are provided that are fixed at the opposite ends of the cylindrical shell 10. This latter is rotatably mounted about a fixed hollow shaft 20 having a cavity 21 and a lateral surface 22 provided with a plurality of holes 25.
  • the fixed hollow shaft 20 is provided, in particular, with an inlet mouth 23, through which a flow of hot gas 100, preferably a flow of hot air, in particular having a temperature higher than 100 °C, is fed into the cavity 21.
  • the temperature of the hot air is advantageously less than 700 °C in order to avoid to generate too high thermoelastic stresses on the structure of cylinder 1.
  • the fixed hollow shaft 20 is, then, provided with an outlet mouth 24 provided at the opposite side of inlet mouth 23.
  • outlet mouth 24 Through the outlet mouth 24, the flow of hot air 100, which is introduced through the inlet mouth 23, exits the dryer cylinder 1 after having hit the internal surface 11 of shell 10.
  • a partition wall 35 is provided mounted in such a way to divide the fixed hollow body 20 in a feeding portion 20a, arranged upstream of the partition wall 35, and in a discharging portion 20b, arranged downstream of the partition wall 35 ( figure 6 ).
  • the flow of hot air 100 that is fed into the cavity 21 of the feeding portion 20a is arranged to pass, through a plurality of feeding holes 25a, into an internal chamber 30 defined between the internal surface 11 of cylindrical shell 10 and the lateral surface 22 of the hollow shaft 20.
  • the flow of hot air 100 hits, therefore, the internal surface 11 and, then, enters the discharging portion 20b of cavity 21 through a plurality of discharging holes 25b. These are, in particular, closer to the outlet mouth 24 than the feeding holes 25a.
  • the partition wall 35 is arranged transversely to the fixed hollow shaft 20, in particular, it is substantially orthogonal to the longitudinal axis 102 of the fixed hollow shaft 20. In this case, therefore, the feeding portion 20a is closer to the inlet mouth 23, and the discharging portion 20b is closer to the outlet mouth 24.
  • the partition wall 35 is, instead, oriented longitudinally to the fixed hollow body 20.
  • the feeding portion 20a is positioned in the upper part of the fixed hollow shaft 20, while the discharging portion 20b is arranged in the lowest part.
  • the Yankee dryer cylinder 1 provides a plurality of distributor members 40 housed within the internal chamber 30. More in detail, each distributor member 40 is adapted to distribute a share of the flow of hot air 100 coming from the feeding portion 20a of cavity 21, on a respective determined portion of the internal surface 11 of shell 10.
  • each distributor member 40 can be oriented radially to the Yankee cylinder 10.
  • each distributor member 40 can extend longitudinally to the Yankee cylinder 10.
  • each distributor member 40 is tubular-shaped, for example parallelepiped-shaped.
  • each distributor member 40 can provide at least one inlet aperture 41 facing towards at least a feeding hole 25a of the feeding portion 20a of fixed hollow shaft 20, and at least one distribution aperture 42 facing towards the internal surface 11 of the cylindrical shell 10.
  • the distribution aperture 42 of the distributor member 40 is advantageously associated to a distribution panel 45 provided with a plurality of distribution holes 46. These can be uniformly distributed on the surface of the distribution panel 45, in such a way to uniformly distribute the share of the flow of hot air 100, which is delivered by the distributor member 40, on a respective portion of the internal surface 11 of cylindrical shell 10.
  • the distribution holes 46 of the distribution panel 45 are frustoconical-shaped. In this way, it is possible to reduce the pressure drop in the holes, and, therefore, to increase the flow of hot air hitting the shell 10.
  • the internal surface 11 of shell 10 is shown provided with a plurality of circumferential grooves 15, only as an example.
  • the internal surface 11 of shell 10 is not necessarily provided with circumferential grooves.
  • the distribution panel 45 can be a distribution plate made of a stiff material.
  • the distribution panel 45 can be made of a porous material, for example a woven fabric, or a nonwoven fabric, or similar materials, provided of a predetermined level of porosity. In this case, the pores of the material of which the panel is made, act as distribution holes.
  • the distributor members 40 are arranged at predetermined distance from each other and the distribution apertures 42 are arranged at a predetermined distance from the internal surface 11 of shell 10. More in detail, space 50, which is defined by the lateral surfaces facing each other 43 and 44 of two next distributor members 40, in use, is passed through by an exiting flow of hot air. In fact, the flow of hot air coming from cavity 21 of the fixed hollow shaft 20, once distributed by each distributor member 40 on a corresponding portion of internal surface of the cylindrical shell 10, is forced to pass into the space 50, which is arranged downstream of the distributor member 40, from which it comes from, in particular owing to the rotational motion of cylindrical shell 10.
  • the feeding holes 25a and the discharging holes 25b are positioned on respective rows longitudinal to the fixed hollow shaft 20. More precisely, as shown in detail in the figures 5 and 6 , the feeding holes 25a and the discharging holes 25b are positioned on respective staggered longitudinal rows, i.e. arranged on the external surface of the fixed hollow shaft 21, but at different generatrix, in case of cylindrical geometry of the shaft 20, as shown in the figure, or, however, along different directions, but parallel to the axis of the shell 10, in the case in which the shaft 20 has a different geometry, for example a parallelepiped geometry.
  • each row of discharging holes 25b is arranged downstream of a respective row of feeding holes 25a with respect to the advancing direction of the flow of hot air 100 along the internal surface 11 of shell 10. This is determined by the rotational direction of cylindrical shell 10 about its axis of rotation. In this way, therefore, an obligatory path is obtained for the flow of hot air 100 that is, thus, forced to pass from cavity 21 of the fixed hollow shaft 20, into distributor member 40, through the feeding holes 25a, e, after having hit the internal surface 11 del cylindrical shell 10, to pass into the space 50 defined between two next distributor members 40.
  • the inlet mouth 23 and the outlet mouth 24 are arranged at the same side of the fixed hollow body 20.
  • a closing wall 26 is provided at the end of the fixed hollow shaft 20 that is opposite to the inlet mouth and to the outlet mouth 24. In this way, it is possible to simplify the construction.
  • a shaft 80 having a small diameter since there is no further need of using a duct with a great diameter for the exit of hot air from Yankee cylinder 1, it is sufficient a shaft 80 having a small diameter and it is, therefore, possible to use a bearing 62 having a small size.
  • the partition wall 35 extends longitudinally along the fixed hollow shaft 20, but comprises two planar portions 35a and 35b inclined of a predetermined angle ⁇ .
  • the feeding portion 20a of the fixed hollow shaft 20 having the feeding holes 25a is, in this case, set between the two planar portions 35a and 35b.
  • the discharging portion 20b provided with the discharging holes 25b is the portion of the fixed hollow shaft 20 corresponding to a central angle ⁇ , in particular the explementary angle of that angle ⁇ . In this case, therefore, the flow of hot air is delivered at the portion 13 of the internal surface 11 of shell 10 of Yankee dryer cylinder 1.
  • this embodiment can provide one, or more, distributor members 40 having, or not having, the distribution plate 45, as above described. As shown in detail in the enlargement of figure 14 , the distributor members 40 are arranged at a predetermined distance d from the internal surface 11 of shell 10.
  • the hot air fed into the cavity 21 of the fixed hollow shaft 20 can be obtained, in particular, as exhaust fumes, by a machine for producing electrical energy, or by means of a cogenerator, i.e. by means of a "turbogenerator", or a different machine for producing energy that is arranged in the plant where the Yankee dryer cylinder 1, according to the invention, has to be installed, or however in the neighbourhood of the same. If it is necessary to reduce the temperature of the exhaust fumes, normally about 600-700 °C, it is sufficient to cool such exhaust fumes before feeding the same to the fixed hollow shaft 20, for example mixing the exhaust fumes with fresh air.
  • the plant 200 comprises a Yankee dryer cylinder 1, as above described with reference to the figures 1 to 11 .
  • the Yankee cylinder 1 is, in particular, provided with an external surface 12, on which, in use, the humid web 160 to be dried is positioned.
  • Plant 200 comprises, furthermore, a drying hood 150 arranged to work in combination with the Yankee cylinder 1 in order to cause the drying of the humid web of paper.
  • the drying hood 150 is arranged to suck the humidity, which is produced by contact of the humid paper web with the surface 12 of the Yankee dryer cylinder 1 and to feed a flow of hot air on said humid paper web 160.
  • plant 200 provides, furthermore, a duct 180 arranged to pneumatically connect the drying hood 150 to the cavity 21 of the fixed hollow shaft 20. More precisely, the duct 180 is arranged to feed a flow of hot air, which circulates within the drying hood 150, into the cavity 21.
  • This particular construction solution allows to optimize the energy consumption, in particular, for producing hot air.
  • the drying hood 150 which is positioned above the Yankee dryer cylinder 1, circulates a high flow of hot air, in part, produced by the evaporation of the humidity caused by the contact of humid web of paper 160 with the external surface of Yankee cylinder 1, and, in part, produced within the drying hood 150 that is provided with at least one burner, in particular a burner powered by methane gas, for producing hot air.
  • the hot air produced within the hood 150 is directed towards the humid web 160, which slides on the surface of the dryer cylinder, causing the drying of the humidity that is evaporated from the humid paper web 160.
  • the drying hood 150 is, in particular, divided into a "humid" part 151 and a "dry” part 152.
  • the present invention provides both the case in which the duct 180 is connected to the dry part ( figure 15A ), and the case in which the duct 180 is connected to the humid part of the hood 150 ( figure 15B ). This can be obtained, connecting the duct 180 directly to one of the two parts of the hood 150, as shown in the figures 15A and 15B , or to a respective discharging duct, this case is not shown in the figures for reasons of simplicity.
  • the temperature of the air circulating within the dry part of the drying hood is about 600-700°C.
  • the hot air exiting the dry part can be mixed with cold air, before introducing the same in the fixed hollow shaft 20.
  • the humid part of the hood is, in particular, passed through by a flow of hot air having a temperature less than the air circulating within the dry part.
  • the temperature of the air circulating within the humid part of hood 150 in fact, is about 300-400 °C and, therefore, ideal for being fed into the cavity 21 of the fixed hollow shaft 20, without incurring in the above described drawbacks.
  • the fact of using humid air allows to have, under the same temperature, and because of the presence of humidity, an available thermal power greater than that of the case in which dry hot air is used.
  • the hot air can be withdrawn both from the dry part 152 and from the humid part 151 of hood 150 and mixing the two flows of hot air, before feeding the hot air into the fixed hollow shaft 20.

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

Claims (15)

  1. Yankee-Trockenzylinder (1), umfassend:
    - eine Hohlwelle (20), die einen Hohlraum (21) und eine Seitenfläche (22), die mit einer Vielzahl von Löchern (25) versehen ist, die angeordnet sind, um den Hohlraum (21) mit der äußeren Umgebung zu verbinden, aufweist wobei die Hohlwelle (20) mit Folgendem versehen ist:
    - eine Einlassöffnung (23), durch die ein Heißgasstrom (100) mit einer vorbestimmten Temperatur, insbesondere einer Temperatur von mehr als 100 °C, angeordnet ist, um in den Hohlraum (21) eingeleitet zu werden;
    - eine Auslassöffnung (24), durch die der Heißgasstrom (100) angeordnet ist, um den Trockenzylinder (1) zu verlassen;
    - eine zylindrische Hülle (10), die mit einer Innenfläche (11) versehen ist, wobei eine Innenkammer (30) zwischen der Innenfläche (11) der zylindrischen Hülle (10) und der Seitenfläche (22) der Hohlwelle (20) definiert ist;
    - eine Trennwand (35), die auf eine Weise innerhalb des Hohlraums (21) montiert ist, um die feste Hohlwelle (20) in einen Zuführabschnitt (20a) und in einen Entladeabschnitt (20b) zu unterteilen, wobei der Zuführabschnitt (20a) mit mindestens einem Zuführloch (25a) versehen ist, das angeordnet ist, um den Heißgasstrom (100) aus dem Hohlraum (21) zu der Innenkammer (30) zu leiten, auf eine Weise, dass er auf die Innenfläche (11) trifft, wobei der Entladeabschnitt (20b) mit mindestens einem Entladeloch (25b) versehen ist, das pneumatisch mit der Auslassöffnung (24) verbunden ist, wobei der Heißgasstrom nach dem Auftreffen auf die Innenfläche (11) der Hülle (10) angeordnet ist, um durch das oder jedes Auslassloch (25b) aus der Innenkammer (30) zu dem Hohlraum (21) zu verlaufen, auf eine Weise, dass er aus dem Yankee-Trockenzylinder (1) durch die Auslassöffnung (24) strömt;
    wobei der Yankee-Trockenzylinder (1) dadurch gekennzeichnet ist, dass die Hohlwelle (20) eine feste Hohlwelle ist und dass die zylindrische Hülle (10) drehbar um die feste Hohlwelle (20) montiert ist.
  2. Yankee-Trockenzylinder (1) nach Anspruch 1, wobei eine Vielzahl von Verteilerelementen (40) bereitgestellt ist, die in der Innenkammer (30) untergebracht sind, wobei jedes Verteilerelement (40) der Vielzahl angeordnet ist, um einen Teil des in den Hohlraum (21) der festen Hohlwelle (20) zugeführten Heißgasstroms (100) auf einen jeweils bestimmten Abschnitt der Innenfläche (11) der Hülle (10) zu verteilen.
  3. Yankee-Trockenzylinder (1) nach Anspruch 2, wobei jedes Verteilerelement (40) der Vielzahl röhrenförmig ist und mit mindestens einer Einlassöffnung (41), die zu mindestens einem Zuführloch (25a) weist, und mindestens einer Verteileröffnung (42), die zu der Innenfläche (11) der zylindrischen Hülle (10) weist, versehen ist.
  4. Yankee-Trockenzylinder (1) nach Anspruch 3,
    wobei die oder jede Verteileröffnung (42) einer Verteilerplatte (45) zugeordnet ist, die mit einer Vielzahl von Verteilerlöchern (46) versehen ist, um den jeweiligen Anteil des Heißgasstroms (100) auf dem jeweiligen Abschnitt der Innenfläche (11) der zylindrischen Hülle (10) gleichmäßig zu verteilen.
  5. Yankee-Trockenzylinder (1) nach Anspruch 2, wobei die Verteilerelemente (40) in einem vorbestimmten Abstand voneinander angeordnet sind und die Verteileröffnungen (42) in einem vorbestimmten Abstand von der Innenfläche (11) der Schale (10) angeordnet sind, auf eine Weise, dass die einander zugewandten Seitenflächen von zwei anliegenden Verteilerelementen (40) angeordnet sind, um einen Raum abzugrenzen, der in der Verwendung von einem austretenden Heißgasstrom durchströmt wird, der auf die Auslassöffnungen (25b) gerichtet ist.
  6. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei der Zuführabschnitt (20a) eine Vielzahl von Zuführlöchern (25a) und der Entladeabschnitt eine Vielzahl von Entladelöchern (25b) bereitstellt, wobei die Zuführlöcher (25a) und die Entladelöcher (25b) an der festen Hohlwelle (20) in verschiedenen Längsreihen positioniert sind.
  7. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei jedes Verteilerelement (40) der Vielzahl radial zur zylindrischen Hülle (10) ausgerichtet ist und sich in Längsrichtung entlang des Yankee-Zylinders (1) erstreckt.
  8. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei die Einlassöffnung (23) und die Auslassöffnung (24) auf einer gleichen Seite der festen Hohlwelle (20) bereitgestellt sind.
  9. Yankee-Trockenzylinder (1) nach Anspruch 8,
    wobei an dem Ende der festen Hohlwelle (20) gegenüber der Einlassöffnung (23) und der Auslassöffnung (24) eine Abschlusswand (26) bereitgestellt ist.
  10. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei die Trennwand (35) ausgewählt ist aus der Gruppe bestehend aus:
    - einer Trennwand (35), die im Wesentlichen orthogonal zu der Längsachse (102) der festen Hohlwelle (20) angeordnet ist;
    - einer Trennwand (35), die in Längsrichtung zu der festen Hohlwelle (20) angeordnet ist;
    - einer Trennwand (35), die sich in Längsrichtung entlang der festen Hohlwelle (20) erstreckt, wobei die Trennwand einen ersten Abschnitt (35a) und einen zweiten Abschnitt (35b) umfasst, die um einen vorbestimmten Winkel (a) geneigt sind.
  11. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei der Heißgasstrom ein Strom aus einem Gasgemisch ist.
  12. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei der Heißgasstrom ein Heißluftstrom ist.
  13. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei die Temperatur des Heißgasstroms zwischen 250 °C und 700 °C, vorzugsweise zwischen 300 °C und 600 °C, eingestellt ist.
  14. Yankee-Trockenzylinder (1) nach einem der vorherigen Ansprüche,
    wobei eine Saugvorrichtung bereitgestellt ist, die mit der Auslassöffnung (24) der festen Hohlwelle (20) verbunden ist, wobei die Saugvorrichtung angeordnet ist, um den Heißgasstrom, der in den Hohlraum (21) der festen Hohlwelle (20) zugeführt wird, durch die Einlassöffnung (23) zu saugen.
  15. Anlage (200) zum Trocknen einer feuchten Papierbahn (160), umfassend:
    - einen Yankee-Trockenzylinder (1) nach einem Anspruch von 1 bis 14, wobei der Yankee-Trockenzylinder (1) mit einer Außenfläche (12) versehen ist, auf die in der Verwendung die zu trocknende feuchte Bahn (160) gelegt wird;
    - eine Trockenhaube (150), die in der Verwendung auf der gegenüberliegenden Seite des Yankee-Trockenzylinders (1) in Bezug auf die feuchte Bahn (160) angeordnet ist, wobei die Trockenhaube (150) angeordnet ist, um das Trocknen der feuchten Bahn (160) zu bewirken, indem sie in Kombination mit dem Yankee-Trockenzylinder (1) betrieben wird;
    - einen Kanal (180), der angeordnet ist, um die Trockenhaube (150) und den Hohlraum (21) der festen Hohlwelle (20) pneumatisch zu verbinden, wobei der Kanal (180) angeordnet ist, um einen Heißgasstrom (100) zuzuführen, der innerhalb der Trockenhaube (150) innerhalb des Hohlraums (21) zirkuliert.
EP17707658.5A 2016-01-22 2017-01-10 Yankee-trockenzylinder mit dampflosem betrieb Active EP3405612B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17707658T PL3405612T3 (pl) 2016-01-22 2017-01-10 Walcowa suszarka Yankee działająca bez pary

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2016A000329A ITUB20160329A1 (it) 2016-01-22 2016-01-22 Cilindro essiccatore monolucido senza impiego di vapore
PCT/IB2017/050105 WO2017125829A1 (en) 2016-01-22 2017-01-10 Yankee dryer cylinder operating without steam

Publications (2)

Publication Number Publication Date
EP3405612A1 EP3405612A1 (de) 2018-11-28
EP3405612B1 true EP3405612B1 (de) 2020-03-11

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US3633662A (en) * 1970-01-16 1972-01-11 Beloit Corp Dryer drum assembly
FI88630C (fi) * 1992-06-08 1993-06-10 Valmet Paper Machinery Inc Foerfarande och anordning foer att effektivera funktionen av ett yankeepressparti i en mjukpappersmaskin
US6683284B2 (en) * 2002-03-22 2004-01-27 Metso Paper Karlstad Ab Thermal roll for papermaking with a fluid circulation system and method therefor
DE102005000795A1 (de) * 2005-01-05 2006-07-13 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn
CN103334332B (zh) * 2013-06-05 2015-06-10 杭州大路装备有限公司 高速卫生造纸机系统的高效干燥烘缸装置及其干燥方法
CN204455702U (zh) * 2014-12-24 2015-07-08 佛山市南海区宝拓造纸设备有限公司 一种钢制扬克烘缸
CN204370234U (zh) * 2014-12-27 2015-06-03 潍坊凯信机械有限公司 一种杨克烘缸的缸体总成

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CN108603337A (zh) 2018-09-28
WO2017125829A1 (en) 2017-07-27
US20190024314A1 (en) 2019-01-24
JP2019508657A (ja) 2019-03-28
BR112018014780A2 (pt) 2018-12-11
PL3405612T3 (pl) 2020-09-21
EP3405612A1 (de) 2018-11-28
ITUB20160329A1 (it) 2017-07-22

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