WO2012152546A1 - Procédé de récupération de chaleur pour une section de séchage d'une machine destinée à fabriquer une bande de matière et section de séchage - Google Patents

Procédé de récupération de chaleur pour une section de séchage d'une machine destinée à fabriquer une bande de matière et section de séchage Download PDF

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Publication number
WO2012152546A1
WO2012152546A1 PCT/EP2012/056971 EP2012056971W WO2012152546A1 WO 2012152546 A1 WO2012152546 A1 WO 2012152546A1 EP 2012056971 W EP2012056971 W EP 2012056971W WO 2012152546 A1 WO2012152546 A1 WO 2012152546A1
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WO
WIPO (PCT)
Prior art keywords
heating medium
drying
material web
machine
mass flow
Prior art date
Application number
PCT/EP2012/056971
Other languages
German (de)
English (en)
Inventor
Erich Brunnauer
Andreas Ziegelwanger
Norbert Karner
Erich Rollenitz
Original Assignee
Voith Patent 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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2012152546A1 publication Critical patent/WO2012152546A1/fr

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Classifications

    • 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
    • D21F5/04—Drying on cylinders on two or more drying 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
    • D21F5/20—Waste heat recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a method for heat recovery for a dryer section of a machine for producing a material web, in particular a fibrous web in the form of a paper, board or tissue web, in which the material web is at least indirectly dried on a plurality of heated drying cylinders.
  • the invention further relates to a drying section for a machine for producing a material web, in particular a fibrous web in the form of a paper, board or tissue web, with a plurality of heated drying cylinders.
  • Drying sections for machines for producing a material web in which the material web is dried on at least one heatable drying cylinder are known in various designs from the prior art. Frequently, a plurality of drying cylinders is provided, wherein in the area of the inlet of the web into the dryer section with steam heated drying cylinders are used, the special circuits in the individual drying cylinders or a plurality of these commonly associated steam / condensate system even with lower cylinder surface temperatures down to 45 ° C to 50 ° C can be operated. For this purpose, however, a mode of operation with vacuum is required, which is connected due to the means to be provided and the control engineering effort with appropriate operating and investment costs. Also, the minimum achievable temperature are physically limited.
  • the saturation vapor temperature is 69.1 ° C.
  • the temperature at the respective cylinder surface is in such heatable cylinders when operated by the heat loss through the paper by 15 ° C to 25 ° C lower than the steam temperature.
  • the temperatures at the cylinder surfaces are much higher, since there is no heat dissipation. This can lead to problems in transferring because of the strip on the cylinder because of the large difference between the temperature of the strip and the cylinder surface adheres.
  • the invention is therefore based on the object to further develop a dryer section such that the disadvantages mentioned are avoided and in the region of the inlet into the dryer section and temperatures of acting as a heating surface cylinder surfaces of the drying cylinders can be provided in the range between 40 ° C and 60 ° C lie without having to provide a vacuum level. Furthermore, the solution according to the invention should be suitable for rapidly reducing the surface temperature at the respective drying cylinder in order to make transfer operations more effective and easier.
  • the solution according to the invention is characterized in terms of the operation of the dryer section by a method for heat recovery.
  • the inventive method for heat recovery for a dryer section of a machine for producing a material web, in particular a fibrous web in the form of a paper, board or tissue web, in which the material web is at least indirectly dried on a plurality of heated drying cylinders is characterized in that at least in the direction of passage of the web through the dryer section first drying cylinder and optionally further downstream of this drying cylinder are designed as double-walled drying cylinder, which are acted upon by a liquid heating medium, wherein the temperature of the liquid heating medium through the at least indirect use of heat at least one mass flow from the dryer section and / or the machine for producing a material web is influenced.
  • a stream of liquid or gaseous media or mixtures thereof understood. This is defined by the mass of a medium that moves through a cross-section in a certain time unit.
  • the mass flows can be process streams.
  • Process streams are streams involved in processes in some form, i. Input currents or streams to be supplied to a process, the stream passing through the process and output currents.
  • the output streams can either again act as process streams in other processes or be present as pure waste product streams.
  • the drying cylinder comprises a radially outer cylinder jacket and a radially inner cylinder jacket arranged coaxially therewith and coupled at least indirectly to it, forming at least one hollow or intermediate space which can be acted upon by the liquid heating medium.
  • Cylindrical jackets arranged coaxially with one another and at least indirectly coupled to one another with the formation of at least one hollow space or vaporizable space are understood in a first embodiment to be cylindrical shells, ie separate cylindrical components which are detachably or non-detachably connected to one another by appropriate means.
  • the second education is through the integral construction and over recesses and Holes characterized in the outer wall portion of a hollow cylinder incorporated cavities.
  • thermodynamic advantage of the solution according to the invention consists in that substantially lower temperatures than the steam-heated drying cylinders according to the prior art can be set on the surfaces of the drying cylinder arranged in the inlet section in the drying section. This results in advantages in terms of the detachment behavior of the material web and the contamination behavior, in particular when transferring the material web by avoiding excessive adhesive forces of the material web strip.
  • cylinder surface coating e.g., tungsten carbide
  • the inertia of the system is low, i. the required surface temperatures to be set can be very fast, i. be adjusted promptly.
  • the solution according to the invention also has the advantage that already existing heat flows in a dryer section or from other areas of a machine for producing a material web can be effectively utilized and thus the energy balance of the dryer section and thus the machine for the production of material webs is improved overall.
  • the surface temperature of the respective drying cylinder is set as a function of the temperature of the heating medium.
  • the temperature of the heating medium is controlled for this purpose, particularly preferably regulated.
  • the control offers the advantage of the continuous guarantee of equal conditions on the surface of the respective drying cylinder.
  • the heat transfer to the heating medium there are a variety of possibilities. This can be at least indirectly, ie via at least one Heat exchanger or directly. According to the first possibility, the heat of the at least one mass flow is transmitted to the heating medium via at least one heat exchanger. In this embodiment, mass flow and heating medium are separated, ie there is no mixing. This embodiment is particularly suitable for mass flows that are not present as liquid media, whereby the spectrum of heat utilization is significantly expanded in a machine for producing a material web.
  • At least one partial flow of the at least one mass flow in functional concentration is used directly as the heating medium.
  • this embodiment is dispensed with separate heat exchanger and consequent transmission losses and significantly reduces the cost of media management due to the elimination of the routes for a medium.
  • a mass flow a process stream from a running in the dryer section and / or the machine for producing a material web process is used. These are in any case present during operation of the dryer section or the machine for producing a material web or to be introduced into these streams whose heat is thus used effectively.
  • an exhaust gas stream in particular an exhaust air stream of a hot air drying element, for example in the form of a hot air hood assigned to a drying cylinder, is used as the mass flow from the dryer section and / or the machine for producing a material web.
  • condensate makes it possible to set very low temperatures on the directly applied to this or indirectly acted upon by heat transfer to the heating medium drying cylinder. Furthermore, a separate preparation can be omitted.
  • a fluid in the form of water is used in particular in heat input via a heat exchanger.
  • a condensate produced during the operation of other drying cylinders is advantageously used as heating medium, which can be conducted via one or more condensate separator stages.
  • a dryer section according to the invention for a machine for producing a material web, in particular a fibrous web in the form of a paper, board or tissue web, with a plurality of heated drying cylinders characterized in that the first drying cylinder in the direction of passage and optionally further downstream of this drying cylinder with a each individual drying cylinder or a plurality of these associated heating medium supply system are designed for application to a liquid heating medium, wherein the single heating medium supply system is thermally coupled to at least one mass flow of the dryer section and / or the machine for producing a material web.
  • At least one feed line for the heating medium of the heating medium supply system which is coupled to the first drying cylinder and, if appropriate, further downstream drying cylinders, is provided with at least one mass flow by heating technology Drying section and / or coupled to the machine for producing a material web.
  • the heating medium supply system comprises a separate heating medium source, which is coupled to the drying cylinder, and is designed to be able to provide liquid heating medium the heat-technical coupling of the heating medium supply system with the at least one mass flow of the dryer section and / or mass flow of the machine for producing a material web via at least one heat exchanger, in particular heat exchanger takes place.
  • This design offers the advantage that all theoretically possible mass flows are available as heat-emitting streams.
  • the heat technology coupling of the heating medium supply system with the at least one mass flow of the dryer section and / or the machine for producing a material web is carried out directly by the heating medium supply system is formed from components of another drying cylinder associated steam / condensate system and at least one condensate or a vapor / condensate mixture leading line is connected to the first or the first drying cylinders of the dryer section in the feed direction for loading.
  • This solution is characterized by a high functional concentration with low design and control engineering effort.
  • the heating medium supply system means for individual control and / or regulation of the temperature of the Heating medium provided. These can be designed as additional heating or cooling devices, on a simple way, a locally flexible fine adjustment of the temperature of the heating medium is possible.
  • Figure 1 illustrates a first basic embodiment of a dryer section and a method for heat recovery
  • Figure 2 illustrates the basic structure of a in the region of the inlet of the
  • Figure 3 shows a second basic embodiment of a dryer section and a
  • FIG. 4 shows a further development of the second basic version of a
  • FIG. 5 shows by way of example a particularly advantageous embodiment of a
  • FIG. 1 illustrates in an exemplary schematic simplified representation an embodiment according to the invention of a dryer section 1 and with reference to this the basic principle of a method according to the invention for heat recovery.
  • the drying section 1 comprises a plurality of heatable drying cylinders TZ, wherein one or a plurality of these are summarized in drying groups.
  • drying groups I and II are provided by way of example, wherein each of the drying groups comprises at least one, preferably a plurality of drying cylinders TZ M to TZi n or TZm to TZn n with n> 1. Only the first and last drying cylinder of a dryer group I, II are shown by way of example.
  • FIG. 1 illustrates in an exemplary schematic simplified representation an embodiment according to the invention of a dryer section 1 and with reference to this the basic principle of a method according to the invention for heat recovery.
  • the drying section 1 comprises a plurality of heatable drying cylinders TZ, wherein one or a plurality of these are summarized in drying groups.
  • drying section 1 does not show a concrete construction of a dryer section 1, but only the components required to explain the basic principle in a highly schematically simplified representation. Not shown are further functional units and the fibrous web or these supporting bands, in particularizersiebb.
  • a drying section 1 is part of a machine, not shown here, for producing a material web, in particular fibrous web, in the form of a paper, board or tissue web.
  • the individual drying groups I and II are connected in the direction of passage through them one behind the other.
  • a coordinate system is applied to the dryer section 1 by way of example.
  • the X-direction describes the extension direction of the dryer section in the longitudinal direction of the machine and is therefore also referred to as the machine direction MD.
  • the Y-direction corresponds to the width direction transverse to the machine direction MD and is therefore also referred to as the cross-machine direction CD.
  • the Z direction coincides with the height direction.
  • At least one drying cylinder in particular the first drying cylinder TZ M of the drying group I, which corresponds in the direction of passage of the first drying group, is designed as a double-walled heatable cylinder, hereinafter referred to as heating cylinder 2.
  • heating cylinder 2 a double-walled heatable cylinder
  • a plurality of drying cylinders of the first drying group I very particularly preferably all drying cylinders TZ M to TZi n are designed as double-walled heating cylinder 2.
  • each of the double-walled heating cylinder 2 comprises a radially inner cylindrical shell 3 and a radially outer cylindrical shell 5 spaced apart from it, forming at least one hollow or intermediate space 4 which can be acted upon by the heating medium HM.
  • the heating medium HM is a fluid according to the invention. in particular a liquid heating medium in the form of hot water or condensate.
  • the hollow or intermediate space 4 can be designed as a circumferentially and / or longitudinal direction, ie viewed parallel to the cylinder axis, continuous annular space or from a plurality of individual annular segment-shaped partial spaces, in the circumferential direction and / or Transverse direction of the individual heating cylinder 2 are arranged adjacent to each other, are formed.
  • the individual partial intermediate spaces can be acted upon individually or in groups or together with heating medium HM.
  • the liquid heating medium HM is inventively heated according to the requirements during operation of the dryer section 1 and / or cooled.
  • a heating medium supply system 6 is provided for this purpose, which is assigned to at least one, preferably a plurality of double-walled heating cylinders 2 of the drying group I and optionally the drying group II for the purpose of loading with heating medium HM.
  • the adaptation to the temperatures to be achieved on the surfaces of the heating cylinder 2 in the individual modes of operation can be done by targeted heating and / or cooling of the heating medium HM in the heating medium supply system 6.
  • the heating medium supply system 6 can be designed as a self-sufficient system with at least one heating medium source 9.
  • the heating medium HM in particular the fluid is provided.
  • the heating / cooling of the heating medium HM is carried out by using the heat of at least one mass flow MS from the dryer section 1 or other Sections of the machine for producing a material web.
  • the heat energy is thereby concretely taken from mass flows in the form of already existing process and / or output streams of the dryer section 1 and / or the machine for producing a material web.
  • a mass flow is understood as meaning a stream of liquid or gaseous media or mixtures of these.
  • Process streams are streams that are supplied to and / or involved in a process, ie, input streams and stream passing through processes, and output streams, which in turn may function as process streams in other areas or processes.
  • Output currents are currents that are present after passing through a process. These can either again act as process streams in other processes or be present as pure waste product streams.
  • a mass flow MS of this is performed according to a first embodiment in Figure 1 via a heat exchanger 10, via which also the heating medium HM is performed, for example, in cocurrent and / or countercurrent.
  • the heat exchanger 10 may be designed in various ways. It is crucial that this is suitable to deliver a predefined amount of heat to the heating medium HM.
  • the temperature at the surface of the drying cylinder TZ M can be set, in particular controlled and / or regulated.
  • the heat release can, for example, via the parameters characterizing the guide paths of heating medium HM and mass flow MS within the heat exchanger 10, such as length of the guide paths, dimensioning of the guide paths, flow rate of heating medium HM and / or mass flow MS and the parameters of the heating medium (HM) and the mass flow (MS), how temperature, pressure etc are defined.
  • heating and cooling devices 7, 8 may be devices for direct heating or cooling under the required additional energy input. In this case, no energy from other systems of the machine will be used.
  • the heating medium supply system 6 includes components of mass flow systems leading, here for example a steam / condensate system 1 1 of the second dryer group II.
  • the heating medium source 9 acts here the steam / condensate system 1 1 of the second dryer group II, in particular a functional element of the in the form of a condensate separator.
  • the first drying cylinder TZ M and possibly further drying cylinders of the first drying group I are then acted upon by the mass flow MS output therefrom.
  • control device 13 For setting the target value X-soll for the temperature at the surface of these drying cylinders TZ M to TZi n further devices 12, for example in the form of heating and / or cooling devices 7, 8 are provided here, which can be controlled via a control device 13.
  • the control device 13 can be designed as a control unit or decentralized control device.
  • At least one setpoint X-soll to be set for the temperature at the surface of the individual heating cylinder 2 is at least indirectly characterized in this variable and at least one control variable for controlling a device 12 for influencing the temperature of the heating medium HM is formed and output, here a manipulated variable Y12 to control the device 12th
  • the temperature at the surface of the drying cylinder TZ M to TZi n can also be controlled.
  • a desired value X-soll is specified and the current actual value X-ist or at least one, this at least indirectly, ie detected directly or via functions or other parameters characterizing variables. From the deviation, the manipulated variable Y12 is formed.
  • FIG. 4 illustrates a further development of an embodiment according to FIG. 3, in which, in addition to or as an alternative to influencing the temperature of the mass flow MS after removal from a process, the process is already intervened in the processes forming the mass flow MS and thus already a mass flow MS with the desired , these parameters characterizing how temperature is provided, which is then fed directly to the drying cylinder TZn.
  • the control device 13 also intervenes in the process of providing the mass flow MS, for example by controlling a Kodensatabscheiders in the steam / condensate system 1 1 of the second dryer group II.
  • at least one further manipulated variable Yll via the control device 13th determined and controlled by means of this, the respective control device.
  • FIG. 5 illustrates a particularly advantageous embodiment of the heating medium supply system 6 of a dryer section 1. Illustrated here are individual drying cylinders TZ M to TZ
  • V is part of a drying group IV.
  • the drying group I is associated with a heating medium supply system 6. This is part of a steam / condensate system 1 1 at least one, preferably several other drying groups II to IV, here the drying groups II to IV.
  • each of the individual drying groups I to IV to a central steam supply 14, in particular steam supply line can be coupled, via which the steam D is distributed to the individual dryer groups II to IV.
  • the coupling / decoupling to / from this and / or the setting of the steam parameters, in particular the pressure can be carried out individually or in groups by means of corresponding devices.
  • the devices are designed as valve devices, these preferably being pressure regulating valves.
  • the individual drying groups II, III and IV are connected to the steam supply 14 via one such device 15.1 to 15.3.
  • the possibility of influencing the steam parameters is given, for example, via corresponding devices 16.1, 16.2 in the coupling of individual drying cylinders of individual drying groups, here the drying cylinders TZm and TZ m of the drying groups II and III to the steam supply 14.
  • the drying groups II to IV condenses the individual drying cylinders supplied steam due to the heat transfer through the drying cylinder TZ to the fibrous web.
  • the resulting steam / condensate mixture DKII1, DKII2, DKIII1, DKIII2 DKIV1 is extracted from the drying cylinders TZm to TZ
  • the respective vapor / condensate mixture DKII1, DKII2, DKIII1, DKIII2 DKIV1 is passed over one or more condensate separation stages, the condensate KM, KIM being used as the heating medium HM of the heating medium supply system 6 of the drying cylinders TZ M to TZi n .
  • the drying group II and the drying group III are each assigned a condensate separator S2 and S3, the steam / condensate mixture DKIV1 being conducted, for example, via the condensate separator S2.
  • the steam / condensate mixtures DKII1, DKII2, DKIV1 are supplied to at least one inlet 17 on the condensate separator S2 and the steam / condensate mixtures DKIII1, DKIII2 to at least one inlet 18 on the condensate separator S3.
  • steam contained in the steam / condensate mixture DKII1, DKII2, DKIII1, DKIII2 DKIV1 can ascend as separated steam.
  • condensate may be due to the pressure conditions in the Condensate separator S2, S3 evaporate again and rise as so-called Brüdendampf.
  • the separated steam and the so-called Brüdendampf then give a vapor DS2 or DS3, which can be removed from the Kondensatabscheider S2, in particular at the output 19 and S3, in particular at the output 20 and other steam consumer systems or the individual drying cylinders of the dryer groups can be supplied.
  • This steam DS2 and DS3 is saturated steam corresponding to the pressure in the condensate separators S2 and S3.
  • the condensate KM or K3 is output.
  • the condensate KM, KIM can be collected in the vapor / condensate system 1 1 in a tank 23.
  • the condensate KM, KIM is fed into the heating medium supply system 6.
  • the tank 23 forms the heating medium source 9.
  • the heating medium supply system 6 is designed as a circuit with integrated tank 23.
  • the feed from the tank 23 to the individual drying cylinders TZ M to TZi n is denoted by 25 and the return from the individual drying cylinders TZ M to TZi n to the tank 23 with 26.
  • the individual drying cylinders TZ M to TZin in the heating medium supply system 6, in particular the circuit 24 are connected in parallel.
  • the solution according to the invention is not limited to the embodiments illustrated in FIGS. 1 to 5.
  • Other configurations, in particular of the heating medium supply system 6 are conceivable.
  • the setting of the surface temperature itself is carried out indirectly via the setting of the temperature of the liquid heating medium HM, the temperature of which can be actively controlled by utilizing the heat energy from existing heat flows.
  • FIG. 6 illustrates, by way of example with reference to a signal flow diagram, a method for controlling the surface temperature of drying cylinders, in particular the drying cylinders TZ M to TZi n in the entry area of the drying section 1. It can be seen that in a method step A or the drying cylinder TZ M to TZi n are acted upon by a liquid heating medium HM and in a second process step B a target specification X-soll is set for the temperature to be achieved at the respective cylinder surface, while in Method step C, the target specification, in particular the target value X-solli for the temperature at the surface of the drying cylinder is adjusted by changes in the temperature of the heating medium HM.
  • This process step C is characterized by a manipulated variable specification Y, wherein the manipulated variable Y is selected as a function of the required for setting the setpoint value X-solli characteristic for the temperature of the heating medium HM.
  • this is set in a method step D on an adjusting device, in particular in the heating medium supply system 6 and thus applied to the drying cylinder with the heating medium with the required temperature.
  • This temperature can be controlled or regulated.
  • a corresponding adjustment between the setpoint and the actual value X-soll and X-ist is required, which is additionally indicated here in the signal flow diagram under method step E for recording the actual value, F for adjustment and C for outputting a manipulated variable.
  • control and / or regulation of the respective required temperatures of the individual drying cylinders and the interventions required therefrom on the respective heating medium supply systems 6 can be realized via a control device assigned separately to the drying section 1.

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  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un procédé de récupération de chaleur pour une section de séchage (1) d'une machine destinée à fabriquer une bande de matière, en particulier une bande de matière fibreuse sous la forme d'une bande de papier, de carton ou de papier ouaté, procédé selon lequel la bande de matière est séchée au moins indirectement sur une pluralité de cylindres de séchage chauffables (TZI1 à TZIVn). Cette invention est caractérisée en ce qu'au moins le premier cylindre de séchage (TZI1) dans le sens du passage de la bande de matière à travers la section de séchage (1) et éventuellement d'autres cylindres de séchage (TZI2 à TZIn) montés en aval de celui-ci se présentent sous la forme de cylindres de séchage à double paroi (2) soumis à l'effet d'un milieu chauffant liquide (HM), l'utilisation au moins indirecte de chaleur d'au moins un débit massique (MS) de la section de séchage (1) et/ou de la machine à fabriquer une bande de matière influant sur la température du milieu chauffant liquide (HM).
PCT/EP2012/056971 2011-05-09 2012-04-17 Procédé de récupération de chaleur pour une section de séchage d'une machine destinée à fabriquer une bande de matière et section de séchage WO2012152546A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011075477.6 2011-05-09
DE102011075477A DE102011075477A1 (de) 2011-05-09 2011-05-09 Verfahren zur Wärmerückgewinnung für eine Trockenpartie einer Maschine zur Herstellung einer Materialbahn und Trockenpartie

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WO2012152546A1 true WO2012152546A1 (fr) 2012-11-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023682A1 (de) * 1980-06-25 1982-01-14 Sandvik Conveyor Gmbh, 7012 Fellbach Beheizbare trommel
US5210958A (en) * 1991-07-15 1993-05-18 Mcgill University Paper web drying apparatus and process
DE10162517C1 (de) * 2001-12-19 2003-03-20 Schwaebische Huettenwerke Gmbh Walze
DE102008041860A1 (de) * 2008-09-08 2010-03-11 Voith Patent Gmbh Heizsystem zur Behandlung einer Faserstoffbahn

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023682A1 (de) * 1980-06-25 1982-01-14 Sandvik Conveyor Gmbh, 7012 Fellbach Beheizbare trommel
US5210958A (en) * 1991-07-15 1993-05-18 Mcgill University Paper web drying apparatus and process
DE10162517C1 (de) * 2001-12-19 2003-03-20 Schwaebische Huettenwerke Gmbh Walze
DE102008041860A1 (de) * 2008-09-08 2010-03-11 Voith Patent Gmbh Heizsystem zur Behandlung einer Faserstoffbahn

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