EP3309294B1 - Process air system - Google Patents

Process air system Download PDF

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Publication number
EP3309294B1
EP3309294B1 EP17198199.6A EP17198199A EP3309294B1 EP 3309294 B1 EP3309294 B1 EP 3309294B1 EP 17198199 A EP17198199 A EP 17198199A EP 3309294 B1 EP3309294 B1 EP 3309294B1
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EP
European Patent Office
Prior art keywords
air
hood
burner
dryer hood
heat exchanger
Prior art date
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Application number
EP17198199.6A
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German (de)
French (fr)
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EP3309294A1 (en
Inventor
Marco Popp
Torben Schlieckau
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP3309294A1 publication Critical patent/EP3309294A1/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
    • D21F5/20—Waste heat recovery
    • 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
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0036—Paper-making control systems controlling the press or drying section

Definitions

  • the present invention relates to methods and devices for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web.
  • Paper production requires a relatively large amount of energy in the drying process. From an energetic point of view, air conditioning optimization is aimed at by keeping the energy used for drying as far as possible in the process. For heat recovery in this case is usually a preheat the Haubenzu Kunststoff and especially in Yankee hoods, a preheating of combustion air. In addition, heating the production halls with waste heat is the rule.
  • At least one humidity sensor is provided for measuring the humidity of the hood exhaust air or in the usually two hood halves, namely the wet end and the dry end.
  • the so-called make-up air (fresh air) and exhaust-air flaps (exhaust air flaps) and the hood exhaust fan are set manually.
  • the aim is to set the air pressure while maintaining the highest possible target air humidity in the two hood halves so that no hot air exiting the hood / the hoods and as little indoor air is sucked by vacuum in the hood.
  • the flaps and hood exhaust fan must previously adjusted manually to operate the process air system energetically optimal.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, with which in the simplest and most reliable way automatic control of the process air system of a drying cylinder associated dryer hood and thus always with optimal production of energy in each case changes in production the drying hood is guaranteed.
  • the generic term 'burner' designates a suitable hot air generator. According to the invention, this is to be understood as a suitable device for hot air generation. However, this may not be exclusively an oil or gas-fired burner, for example, to produce hot air by means of steam or thermal oil, a suitable system for the exhaust gas use of a gas turbine or a gas engine.
  • the hot air which is used according to the invention, in this case has a temperature between 180 ° and 450 ° C, preferably between 250 ° C and 350 ° C.
  • the return air from the wet part and return air from the dry part of the dryer hood is in each case returned to the relevant burner, exhaust air from the wet part and exhaust air from the dry part of the dryer hood a heat exchanger - preferably a common heat exchanger fed.- the exiting the heat exchanger again exhaust air over an exhaust fan is discharged to the environment and the preheated by the heat exchanger fresh air supplied to the wet end of the dryer hood burner and associated with the dry part of the dryer hood burners., The humidity of the return air from the wet part and the humidity of the return air from the dry part of the dryer hood is measured .
  • the flow rate of the exhaust fan is controlled and determined by the ratio of supplied to dissipated air mass flow air balance of the wet part and / or he dry part of the drying hood is controlled in each case via the supply of preheated fresh air from the heat exchanger to the wet or dry part of the dryer
  • Due to this embodiment of the method is an extremely simple and reliable way automatic control of the process air system of a drying cylinder associated dryer hood allows whereby an energetically optimal operation of the dryer hood is always guaranteed at respective changes in production such as the paper type.
  • the wet end forms the part of the drying hood, by which the fibrous web guided over the rotating drying cylinder is first charged, and the dry part (dry end) forms the part of the drying hood, through which the Fiber web is then applied.
  • the nominal value for the air balance of the wet part and the dry part of the dry hood can each be in the range of 0.7, for example.
  • the exhaust air mass flow supplied to the heat exchanger from the wet part of the drying hood and / or the exhaust air mass flow supplied to the heat exchanger from the dry part of the drying hood is preferably controlled in each case by means of an exhaust air control element, in particular an exhaust air flap (exhaust air flap).
  • the pre-heated fresh air mass flow supplied to the wet part of the dryer hood from the heat exchanger and / or the preheated fresh air mass flow supplied to the dryer part of the dryer hood from the heat exchanger is preferably in each case by means of a fresh air control element, in particular a fresh air flap (make-up air flap). controlled.
  • the control of the flow of the exhaust fan is advantageously carried out depending on the humidity of the return air from the dryer hood part with the relatively higher water evaporation at fully open Abluftstellelement for controlling the heat exchanger from the wet end of the dryer hood supplied exhaust air mass flow.
  • the supply of preheated fresh air from the heat exchanger to the burner associated with the wet part is preferably regulated correspondingly by means of the fresh air control element associated with this burner.
  • the respective operating state of the wet part of the drying hood can be determined in particular via at least one temperature and / or pressure measurement in the region of the wet part of the drying hood.
  • the air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is preferably regulated to a desired value by means of the fresh air control element assigned to the burner for the dry part.
  • the respective operating state of the dry part of the drying hood can be determined in particular via at least one temperature and / or pressure measurement in the region of the dry part of the drying hood.
  • a machine for producing a fibrous web, in particular paper, board or tissue web this is characterized by hot supply air from a burner is fed to a wet part and a dry part of the dryer hood, return air from the wet part and return air from the dry part of the dryer hood are each returned to the relevant burner, a cascade actuator between the outlets of the wet part and the dry part of the dryer hood , in particular a cascade flap, is switched, is fed via a connected to the output of the wet part channel a heat exchanger exhaust air, the outgoing from the heat exchanger exhaust air over an exhaust fan is discharged back to the environment and through the heat exchanger preheated fresh air via a fresh air actuator, in particular a fresh air flap, a supplied between the dry part of the dryer hood and the dryer part associated burner return air duct is supplied,
  • the respective operating state of the wet part of the drying hood is preferably determined by means of a temperature and / or pressure measurement in the region of the wet part of the drying hood.
  • the air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is preferably regulated to a desired value by means of the fresh air control element.
  • the respective operating state of the dry part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the dry part of the drying hood.
  • a machine for producing a fibrous web, in particular paper, board or tissue web this is characterized by in that in each case hot supply air from a burner is fed to a wet part and a dry part of the drying hood, wherein the wet part and the dry part are a common burner is associated, return air from the wet part and return air from the dry part of the dryer hood is returned to the burner, between the outputs of the wet part and the dry part of the dryer hood a cascade actuator, in particular a cascade valve, is connected via a connected to the output of the wet part channel exhaust air is supplied to a heat exchanger, which is discharged from the heat exchanger exiting exhaust air via an exhaust fan to the environment and through the heat exchanger preheated fresh air via a fresh air actuator, in particular a fresh air flap, a provided between
  • the respective operating state of the wet part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the wet part of the drying hood.
  • the air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is regulated to a desired value by means of the fresh air control element.
  • the respective operating state of the dry part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the dry part of the drying hood.
  • the object is achieved by a device for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, corresponding to a wet part of the dryer hood associated first burner and a first channel system, via which the wet part hot air from the first burner can be fed and return air from the wet part to the first burner is traceable, a dry part of the dryer hood associated second burner and a second channel system, via which the dry part hot air from the second burner can be supplied and return air from the dry part to the second burner is traceable, a heat exchanger , the exhaust air from the wet part and exhaust air from the dry part of the dryer hood can be supplied, an exhaust fan for discharging the exiting from the heat exchanger exhaust air to the environment, a channel through the preheated by the heat exchanger fresh air to the first burner and the z wide burner is fed, humidity sensors
  • the exhaust air mass flow supplied to the heat exchanger from the wet part of the dryer hood and / or the exhaust air mass flow supplied to the heat exchanger from the dry part of the dryer hood are preferably controllable via an exhaust air control element, in particular an exhaust air flap.
  • the pre-heated fresh air mass flow supplied from the heat exchanger to the pre-heated fresh air mass flow supplied to the wet part of the dryer hood and / or to the preheated fresh air mass flow supplied to the dryer part of the dryer hood from the heat exchanger is preferably controllable via a fresh air control element, in particular a fresh air flap.
  • the means for controlling the flow of the exhaust fan depending on the humidity of the return air from the dry hood part with the relatively higher exhaust evaporation are preferably carried out for the corresponding control of the flow of Abluftgebläses with fully open Abluftstellelement for controlling the heat exchanger from the wet end of the dryer hood supplied exhaust air mass flow.
  • the means for regulating the air balance of the wet part of the drying hood can be designed in particular so that the supply of preheated fresh air from the heat exchanger to the burner associated with the wet part is regulated correspondingly via the fresh air control element associated with this burner to regulate the air balance of the wet part.
  • means are provided for measuring the temperature and / or pressure in the region of the wet part of the drying hood and control means for determining the respective operating state of the wet part of the drying hood on the basis of the temperature and / or pressure measurement.
  • means for controlling and / or regulating the humidity of the return air from the dry part of the drying hood are provided via the exhaust part assigned to the drying part.
  • means are provided for controlling the supply supplied by the ratio discharged air mass flow determined air balance of the dry part of the dryer hood provided to a target value, which are designed so that the relevant regulation is made via the burner associated with the dry part fresh air actuator.
  • means for determining the respective operating state of the dry part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the dry part of the drying hood can be provided.
  • means for determining the respective state of the wet part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the wet part of the drying hood can be provided.
  • Preferably means are provided for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part of the dryer hood to a target value, which are designed so that the relevant control is carried out via the Frischluftstellelement.
  • means for determining the respective operating state of the dry part of the drying hood can be provided on the basis of a temperature and / or pressure measurement in the region of the dry part of the drying hood.
  • the drying hood next to the wet part and the dry part still has at least one other part.
  • a drying hood which has more than two parts, it can either be provided that the process air of the at least one additional part is integrated with the regulation according to the invention. Likewise, however, it can also be provided that the process air of the at least one additional hood part is not integrated into the control.
  • a one-piece drying hood can be provided.
  • wet part and dry part of the dryer cover fall together.
  • the regulation according to the invention then analogously also includes only the process air flow of this one hood part.
  • the device for controlling and / or regulating a process air system comprises a drying cylinder, in particular Yankee cylinder, associated dryer hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, a wet end and a Dry part of the dryer hood associated common burner, a channel system via which the wet part and the dry part of the dryer hood each hot supply air from the burner can be supplied and return air from the wet part and return air from the dry part of the dryer hood to the burner is traceable, one between the outputs of the wet section and the dry part of the drying hood switched cascade actuator, in particular cascade flap, a heat exchanger, which is supplied via a connected to the outlet of the Nässeile exhaust air, an exhaust fan for discharging the exiting from the heat exchanger again Exhaust air to the environment, a Frischluftstellelement, in particular fresh air damper, via the preheated by the heat exchanger fresh air is provided between the dry part of the dryer
  • means for determining the respective operating state of the wet part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the wet part of the drying hood can be provided again.
  • Preferably means are provided for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part of the dryer hood to a target value, which are designed so that the relevant control is carried out via the Frischluftstellelement.
  • means for determining the respective operating state of the dry part of the drying hood on the basis of a temperature and / or pressure measurement in the area of the dry part of the drying hood can also be provided.
  • Fig. 1 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system a drying cylinder 12, in particular Yankee cylinder, associated drying hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web.
  • the device 10 comprises a first part 18 of the dryer hood 14 associated with the first burner 18 and a first channel system 20 via which the wet part 16 hot air from the first burner 18 can be fed and return air from the wet part 16 to the first burner 18 is attributable to a Dry part 22 of the dryer hood 14 associated second burner 24 and a second channel system 26, via which the dry part 22 hot air from the second burner 24 can be supplied and return air from the dry part 22 to the second burner 24 is traceable.
  • the device 10 further comprises a heat exchanger 28, the exhaust air from the wet part 16 and exhaust air from the dry part 22 of the drying hood 14 can be supplied, an exhaust fan 30 for discharging the exiting the heat exchanger 28 exhaust air to the environment or the production hall, a channel 32, via the preheated by the heat exchanger 28 fresh air to the first burner 18 and the second burner 24 can be fed, humidity sensors 34, 36 for measuring the humidity of the return air from the wet part 16 and the humidity of the return air from the dry part 22 of the dryer hood 14, means for controlling the flow rate of the exhaust fan 30 as a function of the humidity of the return air from the dryer hood part 16 or 22 with the relatively higher water evaporation, which is usually the wet part 16, and means for controlling the supplied by the ratio of to air mass flow determined certain air balance of the Nässeils 16 and / or the Trocke Part 22 of the drying hood 14 via the supply of preheated fresh air from the heat exchanger 28 to the wet part 16 and dry part 22 of the dryer hood 14 associated first
  • the exhaust air mass flow supplied to the heat exchanger 28 from the wet part 16 of the drying hood 14 can be controlled via an exhaust air control element 38 and the exhaust air mass flow supplied to the heat exchanger 28 from the dry part 22 of the drying hood 14 via an exhaust air control element 40.
  • the exhaust air control elements 38, 40 may in each case in particular be an exhaust air flap or the like.
  • the preheated fresh air mass flow supplied to the wet part 16 of the drying hood 14 from the heat exchanger 28 can be controlled via a fresh air control element 44 and the preheated fresh air mass flow supplied to the second burner 24 from the heat exchanger 28 to the dry part 22 of the drying hood 14.
  • These fresh air control elements 42, 44 may in each case in each case be a fresh air flap or the like.
  • the means for regulating the air balance of the wet part 16 of the drying hood 14 can be designed in particular such that for controlling the air balance of the wet part 16, the supply of preheated fresh air from the heat exchanger 28 to the first burner 18 associated with the wet part 16 via that burner 18 associated Frischluftstellelement 42 is regulated accordingly.
  • means for measuring the temperature and / or pressure in the region of the wet part 16 of the drying hood 14 as well as means for determining the respective operating state of the wet part 16 of the drying hood 14 on the basis of the temperature and / or pressure measurement can be provided.
  • means for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part 22 of the dryer hood 14 may be provided to a target value, which are designed so that the relevant scheme on the second burner 24 for the dry part 22 associated Frischluftstellelement 44 takes place.
  • means for determining the respective operating state of the drying part 22 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the dry part 22 of the drying hood 14 may be provided.
  • the channel systems 20, 26 each include a respective burner 18 and 24 upstream fan 46 and 48, respectively.
  • both the wet part 16 and the dry part 22 of the drying hood 14 are each assigned a temperature sensor 60 or 62.
  • Fig. 2 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system of a drying cylinder 12, in particular Yankee cylinder, associated drying hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, according to another inventive idea.
  • the apparatus 10 comprises a first burner 18 assigned to a wet part of the dryer hood 14 and a first duct system 20, via which hot air from the first burner 18 can be fed to the wet part 16 and return air from the wet part 16 can be returned to the first burner 18, a dry part 22 of the dryer hood 14 associated second burner 24 and a second channel system 26, via which the dry part 22 hot air from the second burner 24 can be supplied and return air from the dry part 22 to the second burner 24 is traceable.
  • a cascade actuating element 50 in particular a cascade flap or the like, is connected between the outputs of the wet part 16 and the dry part 22 of the drying hood 14.
  • the apparatus 10 further comprises a heat exchanger 28, to which exhaust air can be supplied via a channel 52 connected to the outlet of the wet part 16, an exhaust fan 30 for discharging the exhaust air leaving the heat exchanger 28 to the environment, a fresh air control element 54, in particular a fresh air flap or the like in that fresh air preheated by the heat exchanger 28 can be supplied to a return air duct 56 provided between the drying section 22 of the drying hood 14 and the second burner 24 assigned to the drying section 22, at least one humidity sensor 58 for measuring at least the humidity of the return air from the wet section 16 of the drying hood 14 and / or the hood exhaust air, means for controlling the flow of the exhaust fan 30 depending on the measured humidity and in particular means for controlling the air balance of the wet part 16 of the dryer hood 14 via the cascade control element 50 determined by the ratio of supplied to discharged air mass flow to a desired value.
  • a fresh air control element 54 in particular a fresh air flap or the like in that fresh air preheated by the heat exchanger 28 can be supplied
  • means for determining the respective operating state of the wet part 16 of the drying hood 14 can again be provided on the basis of a temperature and / or pressure measurement in the region of the wet part 16 of the drying hood 14.
  • the device 10 may also include means for controlling the determined by the ratio of supplied to dissipated air mass flow air balance of the dry part 22 of the dryer hood 14 to a target value, which are designed so that the relevant control via the Frischluftstellelement 54 takes place.
  • means for determining the respective operating state of the drying section 22 of the drying hood 14 as a function of a temperature and / or pressure measurement in the region of the drying section 22 of the drying hood 14 may be provided.
  • the two channel systems 20, 26 also each contain a respective burner 18 or 24 upstream fan 46 and 48, respectively.
  • Fig. 3 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system of a drying cylinder 12, in particular Yankee cylinder, associated dryer hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, according to a further inventive idea.
  • the apparatus 10 comprises a common burner 64, a channel system 66, assigned to a wet part 16 and a drying part 22 of the drying hood 14, via which hot supply air from the burner 64 can be supplied to the wet part 16 and the dry part 22 of the drying hood 14 and return air from the wet part 16 and return air from the dry part 22 of the drying hood 14 to the burner 64 is traceable, a between the outputs of the Nrusttils 16 and the dry part 22 of the dryer hood 14 switched cascade element 50, in particular cascade flap or the like, a heat exchanger 28, the one with the output of the Nässeils 16 connected channel 52 exhaust air can be supplied, an exhaust fan 30 for discharging the exiting from the heat exchanger 28 air to the environment or the process hall, a fresh air control element 54, in particular fresh air damper or the like, via the preheated by the heat exchanger 28 fresh air one between the Dry part 22 of the Tro Cover hood 14 and the burner 64 provided return channel can be fed and at least one moisture meter 58 for measuring at
  • the hot air from the burner 64 supplied to the wet part 16 and the dry part 22 of the drying hood 14 can be adjusted via an adjusting element 70 or 72.
  • the device 10 comprises means for controlling the flow of the exhaust fan 30 as a function of the measured humidity and means for controlling the air balance of the wet part of the drying hood 14 determined by the ratio of supplied to discharged air mass flow to a setpoint value via the cascade control element 50.
  • means for determining the respective operating state of the wet part 16 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the wet part 16 of the drying hood 14 can in particular also be provided.
  • the device 10 may also include, in particular, means for regulating the air balance of the dry part 22 of the drying hood 14, which is determined by the ratio of supplied to discharged air mass flow, also a desired value, which is designed such that the relevant control takes place via the fresh air control element 54.
  • the device 10 can again comprise means for determining the respective operating state of the drying part 22 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the dry part 22 of the drying hood 14.
  • both the wet part 16 and the dry part 22 of the drying hood 14 are each assigned a temperature sensor 60 or 62 again.
  • the channel system 66 also includes a burner 64 upstream of the blower 68 again.

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Description

Die vorliegende Erfindung betrifft Verfahren sowie Vorrichtungen zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn.The present invention relates to methods and devices for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web.

Bei der Papiererzeugung wird ein relativ großer Energieanteil in der Trocknung benötigt. Aus energetischer Sicht wird eine lufttechnische Optimierung angestrebt, indem die zur Trocknung eingesetzte Energie möglichst weitgehend im Prozess gehalten wird. Zur Wärmerückgewinnung erfolgt hierbei in der Regel eine Vorwärmung der Haubenzuluft und insbesondere bei Yankeehauben auch eine Vorwärmung von Verbrennungsluft. Zudem ist eine Beheizung der Produktionshallen mit Abwärme die Regel.Paper production requires a relatively large amount of energy in the drying process. From an energetic point of view, air conditioning optimization is aimed at by keeping the energy used for drying as far as possible in the process. For heat recovery in this case is usually a preheat the Haubenzuluft and especially in Yankee hoods, a preheating of combustion air. In addition, heating the production halls with waste heat is the rule.

In Prozessluftsystemen einer Yankeehaube ist zur Messung der Feuchte der Haubenabluft bzw. in den üblicherweise zwei Haubenhälften, nämlich dem Nassteil (Wet End) und dem Trockenteil (Dry End) jeweils mindestens ein Feuchtefühler vorgesehen. Nach der entsprechenden Feuchtemessung werden die sogenannten Make-up-Air- (Frischluft) und Exhaust-Air-Klappen (Abluftklappen) sowie der Haubenabluftventilator manuell eingestellt. Dabei wird angestrebt, den Luftdruck bei Einhaltung einer möglichst hohen Sollluftfeuchte in den beiden Haubenhälften so einzustellen, dass keine heiße Luft aus der Haube/den Hauben austritt und möglichst wenig Hallenluft durch Unterdruck in die Haube eingesaugt wird. Bei einer jeweiligen Veränderung der Produktion müssen die Klappen und der Haubenabluftventilator bisher manuell nachgestellt werden, um das Prozessluftsystem energetisch optimal zu betreiben.In process air systems of a Yankee hood, in each case at least one humidity sensor is provided for measuring the humidity of the hood exhaust air or in the usually two hood halves, namely the wet end and the dry end. After the appropriate moisture measurement, the so-called make-up air (fresh air) and exhaust-air flaps (exhaust air flaps) and the hood exhaust fan are set manually. The aim is to set the air pressure while maintaining the highest possible target air humidity in the two hood halves so that no hot air exiting the hood / the hoods and as little indoor air is sucked by vacuum in the hood. In the case of a respective change in production, the flaps and hood exhaust fan must previously adjusted manually to operate the process air system energetically optimal.

Ein Verfahren sowie eine Vorrichtung der eingangs genannten Art sind beispielsweise in der EP 2 298 988 A1 sowie insbesondere der Publikation Schukov V. et. al. "Yankee hood performance studies: The effect of air balance on thermal efficiency", Tappi journal Bd. 74, Nr.4, 1991, Seiten 141-145 , beschrieben.A method and a device of the type mentioned are, for example, in the EP 2 298 988 A1 and in particular the publication Schukov V. et. al. "Yankee hood performance studies: The effect of air balance on thermal efficiency", Tappi journal Vol. 74, No. 4, 1991, pages 141-145 , described.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung der eingangs genannten Art anzugeben, mit denen auf möglichst einfache und zuverlässige Weise eine automatische Regelung des Prozessluftsystems einer einem Trockenzylinder zugeordneten Trockenhaube ermöglicht und damit auch bei jeweiligen Veränderungen der Produktion stets ein energetisch optimaler Betrieb der Trockenhaube gewährleistet ist.The invention has for its object to provide a method and an apparatus of the type mentioned, with which in the simplest and most reliable way automatic control of the process air system of a drying cylinder associated dryer hood and thus always with optimal production of energy in each case changes in production the drying hood is guaranteed.

Erfindungsgemäß wird diese Aufgabe jeweils durch ein Verfahren mit den Merkmalen des Anspruchs 1 bzw. eine Vorrichtung mit den Merkmalen des Anspruchs 9, gelöst. Bevorzugte Ausgestaltungen des erfindungsgemäßen Verfahrens sowie bevorzugte Ausführungsformen der erfindungsgemäßen Vorrichtung sind in den Unteransprüchen, der nachfolgenden Beschreibung sowie der Zeichnung zu entnehmen.According to the invention, this object is achieved in each case by a method having the features of claim 1 or a device having the features of claim 9. Preferred embodiments of the method according to the invention and preferred embodiments of the device according to the invention can be found in the subclaims, the following description and the drawings.

Gemäß der Erfindung zeichnet sich das Verfahren zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, dadurch aus, dass einem Nassteil und einem Trockenteil der Trockenhaube jeweils heiße Zuluft mit einem Brenner zugeführt wird.According to the invention, the method for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, characterized in that a wet part and a dry part of the dryer hood each hot supply air is supplied with a burner.

Im Rahmen dieser Anmeldung wird der einfacheren Lesbarkeit halber mit dem generischen Begriff 'Brenner' ein geeigneter Heißlufterzeuger bezeichnet. Erfindungsgemäß soll hierunter eine geeignete Vorrichtung zur Heißlufterzeugung verstanden werden. Hierbei kann es sich beispielsweise aber nicht ausschließlich um einen öl- oder gasbefeuerten Brenner handeln, um eine Heißlufterzeugung mittels Dampf oder Thermoöl, eine geeignete Anlage zur Abgasnutzung einer Gasturbine oder eines Gasmotors.In the context of this application, for ease of readability, the generic term 'burner' designates a suitable hot air generator. According to the invention, this is to be understood as a suitable device for hot air generation. However, this may not be exclusively an oil or gas-fired burner, for example, to produce hot air by means of steam or thermal oil, a suitable system for the exhaust gas use of a gas turbine or a gas engine.

Die Heißluft, die erfindungsgemäß zum Einsatz kommt, hat dabei eine Temperatur zwischen 180° und 450°C, bevorzugt zwischen 250°C und 350°C.The hot air, which is used according to the invention, in this case has a temperature between 180 ° and 450 ° C, preferably between 250 ° C and 350 ° C.

Die Rückluft aus dem Nassteil und Rückluft aus dem Trockenteil der Trockenhaube wird jeweils zu dem betreffenden Brenner zurückgeführt, Abluft aus dem Nassteil und Abluft aus dem Trockenteil der Trockenhaube einem Wärmetauscher - vorzugsweise einem gemeinsamen Wärmetauscher- zugeführt.Die aus dem Wärmetauscher wieder austretende Abluft wird über ein Abluftgebläse an die Umgebung abgeführt und die durch den Wärmetauscher vorgewärmte Frischluft dem dem Nassteil der Trockenhaube zugeordneten Brenner und dem dem Trockenteil der Trockenhaube zugeordneten Brenner zugeführt., Die Feuchte der Rückluft aus dem Nassteil und die Feuchte der Rückluft aus dem Trockenteil der Trockenhaube wird gemessen.In Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil mit der relativ höheren Wasserverdampfung wird der Durchfluss des Abluftgebläses gesteuert und die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Nassteils und/oder des Trockenteils der Trockenhaube wird jeweils über die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher zu dem dem Nassteil bzw. Trockenteil der Trockenhaube zugeordneten Brenner auf einen vorgebbaren Sollwert geregelt.The return air from the wet part and return air from the dry part of the dryer hood is in each case returned to the relevant burner, exhaust air from the wet part and exhaust air from the dry part of the dryer hood a heat exchanger - preferably a common heat exchanger fed.- the exiting the heat exchanger again exhaust air over an exhaust fan is discharged to the environment and the preheated by the heat exchanger fresh air supplied to the wet end of the dryer hood burner and associated with the dry part of the dryer hood burners., The humidity of the return air from the wet part and the humidity of the return air from the dry part of the dryer hood is measured .Depending on the humidity of the return air from the dryer hood part with the relatively higher water evaporation, the flow rate of the exhaust fan is controlled and determined by the ratio of supplied to dissipated air mass flow air balance of the wet part and / or he dry part of the drying hood is controlled in each case via the supply of preheated fresh air from the heat exchanger to the wet or dry part of the dryer hood associated burner to a predetermined target value.

Aufgrund dieser Ausgestaltung des Verfahrens wird auf äußerst einfache und zuverlässige Weise eine automatische Regelung des Prozessluftsystems der einem Trockenzylinder zugeordneten Trockenhaube ermöglicht, wodurch bei jeweiligen Veränderungen der Produktion wie beispielsweise der Papiersorte stets ein energetisch optimaler Betrieb der Trockenhaube gewährleistet ist.Due to this embodiment of the method is an extremely simple and reliable way automatic control of the process air system of a drying cylinder associated dryer hood allows whereby an energetically optimal operation of the dryer hood is always guaranteed at respective changes in production such as the paper type.

Dabei bildet der Nassteil (Wet End) den Teil der Trockenhaube, durch den die über den rotierenden Trockenzylinder geführte Faserstoffbahn zuerst beaufschlagt wird, und der Trockenteil (Dry End) den Teil der Trockenhaube, durch den die Faserstoffbahn anschließend beaufschlagt wird. Der Sollwert für die Luftbilanz des Nassteils und des Trockenteils der Trockenhaube kann jeweils beispielsweise im Bereich von 0,7 liegen.In this case, the wet end forms the part of the drying hood, by which the fibrous web guided over the rotating drying cylinder is first charged, and the dry part (dry end) forms the part of the drying hood, through which the Fiber web is then applied. The nominal value for the air balance of the wet part and the dry part of the dry hood can each be in the range of 0.7, for example.

Der dem Wärmetauscher aus dem Nassteil der Trockenhaube zugeführte Abluftmassenstrom und/oder der dem Wärmetauscher aus dem Trockenteil der Trockenhaube zugeführte Abluftmassenstrom wird bevorzugt jeweils mittels eines Abluftstellelements, insbesondere einer Abluftklappe (Exhaust-Air-Klappe) gesteuert.The exhaust air mass flow supplied to the heat exchanger from the wet part of the drying hood and / or the exhaust air mass flow supplied to the heat exchanger from the dry part of the drying hood is preferably controlled in each case by means of an exhaust air control element, in particular an exhaust air flap (exhaust air flap).

Der dem dem Nassteil der Trockenhaube zugeordneten Brenner aus dem Wärmetauscher zugeführte vorgewärmte Frischluftmassenstrom und/oder der dem dem Trockenteil der Trockenhaube zugeordneten Brenner aus dem Wärmetauscher zugeführte vorgewärmte Frischluftmassenstrom wird bevorzugt jeweils mittels eines Frischluftstellelements, insbesondere einer Frischluftklappe (Make-up-Air-Klappe) gesteuert.The pre-heated fresh air mass flow supplied to the wet part of the dryer hood from the heat exchanger and / or the preheated fresh air mass flow supplied to the dryer part of the dryer hood from the heat exchanger is preferably in each case by means of a fresh air control element, in particular a fresh air flap (make-up air flap). controlled.

Die Steuerung des Durchflusses des Abluftgebläses erfolgt zweckmäßigerweise in Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil mit der relativ höheren Wasserverdampfung bei vollständig geöffnetem Abluftstellelement zur Steuerung des dem Wärmetauscher aus dem Nassteil der Trockenhaube zugeführten Abluftmassenstroms.The control of the flow of the exhaust fan is advantageously carried out depending on the humidity of the return air from the dryer hood part with the relatively higher water evaporation at fully open Abluftstellelement for controlling the heat exchanger from the wet end of the dryer hood supplied exhaust air mass flow.

Bevorzugt wird zur Regelung der Luftbilanz des Nassteils der Trockenhaube die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher zu dem dem Nassteil zugeordneten Brenner mittels des diesem Brenner zugeordneten Frischluftstellelements entsprechend reguliert.To regulate the air balance of the wet part of the drying hood, the supply of preheated fresh air from the heat exchanger to the burner associated with the wet part is preferably regulated correspondingly by means of the fresh air control element associated with this burner.

Der jeweilige Betriebszustand des Nassteils der Trockenhaube kann insbesondere über zumindest eine Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube bestimmt werden.The respective operating state of the wet part of the drying hood can be determined in particular via at least one temperature and / or pressure measurement in the region of the wet part of the drying hood.

Von Vorteil ist auch, wenn die Feuchte der Rückluft aus dem Trockenteil der Trockenhaube mittels des dem Trockenteil zugeordneten Abluftstellelements gesteuert und/oder geregelt wird.It is also advantageous if the humidity of the return air from the dry part of the drying hood is controlled and / or regulated by means of the exhaust air actuating element assigned to the dry part.

Die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Trockenteils der Trockenhaube wird bevorzugt mittels des dem Brenner für den Trockenteil zugeordneten Frischluftstellelements auf einen Sollwert geregelt.The air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is preferably regulated to a desired value by means of the fresh air control element assigned to the burner for the dry part.

Der jeweilige Betriebszustand des Trockenteils der Trockenhaube kann insbesondere über zumindest eine Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube bestimmt werden.The respective operating state of the dry part of the drying hood can be determined in particular via at least one temperature and / or pressure measurement in the region of the dry part of the drying hood.

Gemäß einer weiteren erfinderischen Idee für ein Verfahren zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankee-Zylinder zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, zeichnet sich dieses dadurch aus, dass einem Nassteil und einem Trockenteil der Trockenhaube jeweils heiße Zuluft aus einem Brenner zugeführt wird, Rückluft aus dem Nassteil und Rückluft aus dem Trockenteil der Trockenhaube jeweils zu dem betreffenden Brenner zurückgeführt wird, zwischen die Ausgänge des Nassteils und des Trockenteils der Trockenhaube ein Kaskadenstellelement, insbesondere eine Kaskadenklappe, geschaltet wird, über einen mit dem Ausgang des Nassteils verbundenen Kanal einem Wärmetauscher Abluft zugeführt wird, die aus dem Wärmetauscher wieder austretende Abluft über ein Abluftgebläse wieder an die Umgebung abgeführt wird und durch den Wärmetauscher vorgewärmte Frischluft über ein Frischluftstellelement, insbesondere eine Frischluftklappe, einem zwischen dem Trockenteil der Trockenhaube und dem dem Trockenteil zugeordneten Brenner vorgesehenen Rückluftkanal zugeführt wird, zumindest die Feuchte der Rückluft aus dem Nassteil der Trockenhaube und/oder der Haubenabluft gemessen wird, in Abhängigkeit von der gemessenen Feuchte der Durchfluss des Abluftgebläses gesteuert wird und die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Nassteils der Trockenhaube über das Kaskadenstellelement auf einen Sollwert geregelt wird.According to a further inventive idea for a method for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder associated dryer hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, this is characterized by hot supply air from a burner is fed to a wet part and a dry part of the dryer hood, return air from the wet part and return air from the dry part of the dryer hood are each returned to the relevant burner, a cascade actuator between the outlets of the wet part and the dry part of the dryer hood , in particular a cascade flap, is switched, is fed via a connected to the output of the wet part channel a heat exchanger exhaust air, the outgoing from the heat exchanger exhaust air over an exhaust fan is discharged back to the environment and through the heat exchanger preheated fresh air via a fresh air actuator, in particular a fresh air flap, a supplied between the dry part of the dryer hood and the dryer part associated burner return air duct is supplied, at least the humidity of the return air from the wet end of the dryer hood and / or the hood exhaust air is measured, the flow rate of the exhaust fan is controlled in dependence on the measured humidity and the air balance of the wet part of the dryer hood determined by the ratio of supplied to discharged air mass flow is regulated to a desired value via the cascade control element.

Der jeweilige Betriebszustand des Nassteils der Trockenhaube wird bevorzugt über eine Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube bestimmt.The respective operating state of the wet part of the drying hood is preferably determined by means of a temperature and / or pressure measurement in the region of the wet part of the drying hood.

Die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Trockenteils der Trockenhaube wird bevorzugt mittels des Frischluftstellelements auf einen Sollwert geregelt.The air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is preferably regulated to a desired value by means of the fresh air control element.

Der jeweilige Betriebszustand des Trockenteils der Trockenhaube kann insbesondere über eine Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube bestimmt werden.The respective operating state of the dry part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the dry part of the drying hood.

Gemäß einer weiteren erfinderischen Idee für ein Verfahren zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, zeichnet sich dieses dadurch aus, dass einem Nassteil und einem Trockenteil der Trockenhaube jeweils heiße Zuluft aus einem Brenner zugeführt wird, wobei dem Nassteil und dem Trockenteil ein gemeinsamer Brenner zugeordnet wird, Rückluft aus dem Nassteil und Rückluft aus dem Trockenteil der Trockenhaube jeweils zu dem Brenner zurückgeführt wird, zwischen die Ausgänge des Nassteils und des Trockenteils der Trockenhaube ein Kaskadenstellelement, insbesondere eine Kaskadenklappe, geschaltet wird, über einen mit dem Ausgang des Nassteils verbundenen Kanal einem Wärmetauscher Abluft zugeführt wird, die aus dem Wärmetauscher wieder austretende Abluft über ein Abluftgebläse an die Umgebung abgeführt wird und durch den Wärmetauscher vorgewärmte Frischluft über ein Frischluftstellelement, insbesondere eine Frischluftklappe, einem zwischen dem Trockenteil der Trockenhaube und dem Brenner vorgesehenen Rücklaufkanal zugeführt wird, zumindest die Feuchte der Rückluft aus dem Nassteil der Trockenhaube und/oder der Haubenabluft gemessen wird, in Abhängigkeit von der gemessenen Feuchte der Durchfluss des Abluftgebläses gesteuert wird und die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Nassteils der Trockenhaube über das Kaskadenstellelement auf einen Sollwert geregelt wird.According to a further inventive idea for a method for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, this is characterized by in that in each case hot supply air from a burner is fed to a wet part and a dry part of the drying hood, wherein the wet part and the dry part are a common burner is associated, return air from the wet part and return air from the dry part of the dryer hood is returned to the burner, between the outputs of the wet part and the dry part of the dryer hood a cascade actuator, in particular a cascade valve, is connected via a connected to the output of the wet part channel exhaust air is supplied to a heat exchanger, which is discharged from the heat exchanger exiting exhaust air via an exhaust fan to the environment and through the heat exchanger preheated fresh air via a fresh air actuator, in particular a fresh air flap, a provided between the dry part of the dryer hood and the burner return channel is at least the humidity of the return air from the wet end of the dryer hood and / or the hood exhaust air is measured, depending on the measured humidity, the flow rate of the exhaust fan is controlled and by the ratio of supplied to abgegef HRTEM air mass flow determined air balance of the wet part of the drying hood is controlled by the cascade control element to a target value.

Der jeweilige Betriebszustand des Nassteils der Trockenhaube kann insbesondere über eine Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube bestimmt werden.The respective operating state of the wet part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the wet part of the drying hood.

Bevorzugt wird die durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmte Luftbilanz des Trockenteils der Trockenhaube mittels des Frischluftstellelements auf einen Sollwert geregelt.Preferably, the air balance of the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow is regulated to a desired value by means of the fresh air control element.

Der jeweilige Betriebszustand des Trockenteils der Trockenhaube kann insbesondere über eine Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube bestimmt werden.The respective operating state of the dry part of the drying hood can be determined in particular by means of a temperature and / or pressure measurement in the region of the dry part of the drying hood.

Hinsichtlich der Vorrichtung wird die Aufgabe gelöst durch eine Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, entsprechend einen einem Nassteil der Trockenhaube zugeordneten ersten Brenner und ein erstes Kanalsystem, über das dem Nassteil heiße Luft aus dem ersten Brenner zuführbar und Rückluft aus dem Nassteil zu dem ersten Brenner zurückführbar ist, einen einem Trockenteil der Trockenhaube zugeordneten zweiten Brenner und ein zweites Kanalsystem, über das dem Trockenteil heiße Luft aus dem zweiten Brenner zuführbar und Rückluft aus dem Trockenteil zu dem zweiten Brenner zurückführbar ist, einen Wärmetauscher, dem Abluft aus dem Nassteil und Abluft aus dem Trockenteil der Trockenhaube zuführbar ist, ein Abluftgebläse zum Abführen der aus dem Wärmetauscher wieder austretenden Abluft an die Umgebung, einen Kanal, über den durch den Wärmetauscher vorgewärmte Frischluft dem ersten Brenner und dem zweiten Brenner zuführbar ist, Feuchtesensoren zur Messung der Feuchte der Rückluft aus dem Nassteil und der Feuchte der Rückluft aus dem Trockenteil der Trockenhaube, Mittel zur Steuerung des Durchflusses des Abluftgebläses in Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil mit der relativ höheren Wasserverdampfung und Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils und/oder des Trockenteils der Trockenhaube über die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher zu dem dem Nassteil bzw. dem Trockenteil der Trockenhaube zugeordneten ersten bzw. zweiten Brenner auf einen vorgebbaren Sollwert.With respect to the device, the object is achieved by a device for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated drying hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, corresponding to a wet part of the dryer hood associated first burner and a first channel system, via which the wet part hot air from the first burner can be fed and return air from the wet part to the first burner is traceable, a dry part of the dryer hood associated second burner and a second channel system, via which the dry part hot air from the second burner can be supplied and return air from the dry part to the second burner is traceable, a heat exchanger , the exhaust air from the wet part and exhaust air from the dry part of the dryer hood can be supplied, an exhaust fan for discharging the exiting from the heat exchanger exhaust air to the environment, a channel through the preheated by the heat exchanger fresh air to the first burner and the z wide burner is fed, humidity sensors for measuring the humidity of the return air from the wet part and the humidity of the return air from the dry part of the dryer hood, means for controlling the flow of the exhaust fan depending on the humidity of the return air from the dry hood part with the relatively higher water evaporation and means for controlling the air balance of the wet part and / or the dry part of the drying hood determined by the ratio of supplied to discharged air mass flow via the supply of preheated fresh air from the heat exchanger to the first or second burner assigned to the wet part or the dry part of the dryer hood to a presettable one setpoint.

Dabei ist der dem Wärmetauscher aus dem Nassteil der Trockenhaube zugeführte Abluftmassenstrom und/oder der dem Wärmetauscher aus dem Trockenteil der Trockenhaube zugeführte Abluftmassenstrom bevorzugt jeweils über ein Abluftstellelement, insbesondere eine Abluftklappe, steuerbar.In this case, the exhaust air mass flow supplied to the heat exchanger from the wet part of the dryer hood and / or the exhaust air mass flow supplied to the heat exchanger from the dry part of the dryer hood are preferably controllable via an exhaust air control element, in particular an exhaust air flap.

Der dem dem Nassteil der Trockenhaube zugeordneten Brenner aus dem Wärmetauscher zugeführte vorgewärmte Frischluftmassenstrom und/oder der dem dem Trockenteil der Trockenhaube zugeordneten Brenner aus dem Wärmetauscher zugeführte vorgewärmte Frischluftmassenstrom ist bevorzugt jeweils über ein Frischluftstellelement, insbesondere eine Frischluftklappe, steuerbar.The pre-heated fresh air mass flow supplied from the heat exchanger to the pre-heated fresh air mass flow supplied to the wet part of the dryer hood and / or to the preheated fresh air mass flow supplied to the dryer part of the dryer hood from the heat exchanger is preferably controllable via a fresh air control element, in particular a fresh air flap.

Die Mittel zur Steuerung des Durchflusses des Abluftgebläses in Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil mit der relativ höheren Abluftverdampfung sind bevorzugt zur entsprechenden Steuerung des Durchflusses des Abluftgebläses bei vollständig geöffnetem Abluftstellelement zur Steuerung des dem Wärmetauscher aus dem Nassteil der Trockenhaube zugeführten Abluftmassenstroms ausgeführt.The means for controlling the flow of the exhaust fan depending on the humidity of the return air from the dry hood part with the relatively higher exhaust evaporation are preferably carried out for the corresponding control of the flow of Abluftgebläses with fully open Abluftstellelement for controlling the heat exchanger from the wet end of the dryer hood supplied exhaust air mass flow.

Die Mittel zur Regelung der Luftbilanz des Nassteils der Trockenhaube können insbesondere so ausgeführt sein, dass zur Regelung der Luftbilanz des Nassteils die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher zu dem dem Nassteil zugeordneten Brenner über das diesem Brenner zugeordnete Frischluftstellelement entsprechend reguliert wird.The means for regulating the air balance of the wet part of the drying hood can be designed in particular so that the supply of preheated fresh air from the heat exchanger to the burner associated with the wet part is regulated correspondingly via the fresh air control element associated with this burner to regulate the air balance of the wet part.

Bevorzugt sind Mittel zur Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube sowie Steuermittel zur Bestimmung des jeweiligen Betriebszustandes des Nassteils der Trockenhaube auf der Basis der erfolgten Temperatur- und/oder Druckmessung vorgesehen.Preferably, means are provided for measuring the temperature and / or pressure in the region of the wet part of the drying hood and control means for determining the respective operating state of the wet part of the drying hood on the basis of the temperature and / or pressure measurement.

Zweckmäßigerweise sind Mittel zur Steuerung und/oder Regelung der Feuchte der Rückluft aus dem Trockenteil der Trockenhaube über das dem Trockenteil zugeordnete Abluftstellelement vorgesehen.Expediently, means for controlling and / or regulating the humidity of the return air from the dry part of the drying hood are provided via the exhaust part assigned to the drying part.

Gemäß einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung sind Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils der Trockenhaube auf einen Sollwert vorgesehen, die so ausgeführt sind, dass die betreffende Regelung über das dem Brenner für den Trockenteil zugeordnete Frischluftstellelement erfolgt.According to a further preferred embodiment of the device according to the invention, means are provided for controlling the supply supplied by the ratio discharged air mass flow determined air balance of the dry part of the dryer hood provided to a target value, which are designed so that the relevant regulation is made via the burner associated with the dry part fresh air actuator.

Es können insbesondere auch Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils der Trockenhaube auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube vorgesehen sein.In particular, means for determining the respective operating state of the dry part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the dry part of the drying hood can be provided.

Gemäß einer weiteren erfinderischen Idee umfasst die Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, einen einem Nassteil der Trockenhaube zugeordneten ersten Brenner und ein erstes Kanalsystem, über das dem Nassteil heiße Luft aus dem ersten Brenner zuführbar und Rückluft aus dem Nassteil zu dem ersten Brenner zurückführbar ist, einen einem Trockenteil der Trockenhaube zugeordneten zweiten Brenner und ein zweites Kanalsystem, über das dem Trockenteil heiße Luft aus dem zweiten Brenner zuführbar und Rückluft aus dem Trockenteil zu dem zweiten Brenner zurückführbar ist, ein zwischen die Ausgänge des Nassteils und des Trockenteils der Trockenhaube geschaltetes Kaskadenstellelement, insbesondere Kaskadenklappe, einen Wärmetauscher, dem über einen mit dem Ausgang des Nassteils verbundenen Kanal Abluft zuführbar ist, ein Abluftgebläse zum Abführen der aus dem Wärmetauscher wieder austretenden Abluft an die Umgebung, ein Frischluftstellelement, insbesondere Frischluftklappe, über das durch den Wärmetauscher vorgewärmte Frischluft einem zwischen dem Trockenteil der Trockenhaube und dem dem Trockenteil zugeordneten zweiten Brenner vorgesehenen Rücklaufkanal zuführbar ist, wenigstens einen Feuchtesensor zur Messung zumindest der Feuchte der Rückluft aus dem Nassteil der Trockenhaube und/oder der Haubenabluft, Mittel zur Steuerung des Durchflusses des Abluftgebläses in Abhängigkeit von der gemessenen Feuchte und Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils der Trockenhaube über das Kaskadenstellelement auf einen Sollwert.According to a further inventive idea, the apparatus for controlling and / or regulating a process air system of a drying cylinder, in particular Yankee cylinder, associated dry hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, a wet end of the dryer hood associated first burner and a first channel system, via which the wet part of hot air from the first burner can be fed and return air from the wet part to the first burner is traceable, a dry part of the dryer hood associated second burner and a second channel system, on the dry part of the hot air can be fed from the second burner and return air from the dry part to the second burner is traceable, a switched between the outputs of the wet part and the dry part of the dryer hood cascade actuator, in particular cascade flap, a heat exchanger over a m it is fed to the output of the Nässeils channel exhaust air, an exhaust fan for discharging the exiting the heat exchanger exhaust air to the environment, a Frischluftstellelement, in particular fresh air damper on the preheated by the heat exchanger fresh air between the dry part of the dryer hood and the dry part associated second burner provided return channel, at least one humidity sensor for measuring at least the humidity of the return air from the wet end of the dryer hood and / or the hood exhaust air, means for controlling the flow of the exhaust fan depending on the measured humidity and means for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the wet part of the dryer hood on the cascade actuator to a desired value.

Es können insbesondere Mittel zur Bestimmung des jeweiligen Zustands des Nassteils der Trockenhaube auf der Basis eine Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube vorgesehen sein.In particular, means for determining the respective state of the wet part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the wet part of the drying hood can be provided.

Bevorzugt sind Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils der Trockenhaube auf einen Sollwert vorgesehen, die so ausgeführt sind, dass die betreffende Regelung über das Frischluftstellelement erfolgt.Preferably means are provided for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part of the dryer hood to a target value, which are designed so that the relevant control is carried out via the Frischluftstellelement.

Dabei können insbesondere Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils der Trockenhaube auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube vorgesehen sein.In particular, means for determining the respective operating state of the dry part of the drying hood can be provided on the basis of a temperature and / or pressure measurement in the region of the dry part of the drying hood.

Weiterhin kann vorgesehen sein, dass die Trockenhaube neben dem Nassteil und dem Trockenteil noch zumindest einen weiteren Teil aufweist. Bei einer solchen Trockenhaube, die mehr als zwei Teile aufweist, kann entweder vorgesehen sein, dass die Prozessluft des zumindest einen zusätzlichen Teiles mit in die erfindungsgemäße Regelung integriert ist. Ebenso kann aber auch vorgesehen sein, dass die Prozessluft des zumindest einen zusätzlichen Haubenteils nicht in die Regelung integriert ist.Furthermore, it can be provided that the drying hood next to the wet part and the dry part still has at least one other part. In such a drying hood, which has more than two parts, it can either be provided that the process air of the at least one additional part is integrated with the regulation according to the invention. Likewise, however, it can also be provided that the process air of the at least one additional hood part is not integrated into the control.

Weiterhin kann erfindungsgemäß eine einteilige Trockenhaube vorgesehen sein. In diesem Fall fallen Nassteil und Trockenteil der Trockenhaube zusammen. Die erfindungsgemäße Regelung umfasst dann sinngemäß auch nur den Prozessluftstrom dieses einen Haubenteils.Furthermore, according to the invention, a one-piece drying hood can be provided. In this case wet part and dry part of the dryer cover fall together. The The regulation according to the invention then analogously also includes only the process air flow of this one hood part.

Gemäß einer weiteren erfinderischen Idee umfasst die Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder, insbesondere Yankeezylinder, zugeordneten Trockenhaube, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, einen einem Nassteil und einem Trockenteil der Trockenhaube zugeordneten gemeinsamen Brenner, ein Kanalsystem, über das dem Nassteil und dem Trockenteil der Trockenhaube jeweils heiße Zuluft aus dem Brenner zuführbar und Rückluft aus dem Nassteil und Rückluft aus dem Trockenteil der Trockenhaube zu dem Brenner zurückführbar ist, ein zwischen die Ausgänge des Nassteils und des Trockenteils der Trockenhaube geschaltetes Kaskadenstellelement, insbesondere Kaskadenklappe, einen Wärmetauscher, dem über einen mit dem Ausgang des Nassteils verbundenen Kanal Abluft zuführbar ist, ein Abluftgebläse zum Abführen der aus dem Wärmetauscher wieder austretenden Abluft an die Umgebung, ein Frischluftstellelement, insbesondere Frischluftklappe, über das durch den Wärmetauscher vorgewärmte Frischluft einem zwischen dem Trockenteil der Trockenhaube und dem Brenner vorgesehenen Rückluftkanal zuführbar ist, wenigstens einen Feuchtesensor zur Messung zumindest der Feuchte der Rückluft aus dem Nassteil der Trockenhaube und/oder der Haubenabluft, Mittel zur Steuerung des Durchflusses des Abluftgebläses in Abhängigkeit von der gemessenen Feuchte und Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils der Trockenhaube über das Kaskadenstellelement auf einen Sollwert.According to a further inventive idea, the device for controlling and / or regulating a process air system comprises a drying cylinder, in particular Yankee cylinder, associated dryer hood, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, a wet end and a Dry part of the dryer hood associated common burner, a channel system via which the wet part and the dry part of the dryer hood each hot supply air from the burner can be supplied and return air from the wet part and return air from the dry part of the dryer hood to the burner is traceable, one between the outputs of the wet section and the dry part of the drying hood switched cascade actuator, in particular cascade flap, a heat exchanger, which is supplied via a connected to the outlet of the Nässeile exhaust air, an exhaust fan for discharging the exiting from the heat exchanger again Exhaust air to the environment, a Frischluftstellelement, in particular fresh air damper, via the preheated by the heat exchanger fresh air is provided between the dry part of the dryer hood and the burner return air duct, at least one humidity sensor for measuring at least the humidity of the return air from the wet end of the dryer hood and / or the hood exhaust air, means for controlling the flow of the exhaust fan depending on the measured humidity and means for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the wet part of the dryer hood on the cascade actuator to a desired value.

Es können insbesondere wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Nassteils der Trockenhaube auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Nassteils der Trockenhaube vorgesehen sein.In particular, means for determining the respective operating state of the wet part of the drying hood on the basis of a temperature and / or pressure measurement in the region of the wet part of the drying hood can be provided again.

Bevorzugt sind Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils der Trockenhaube auf einen Sollwert vorgesehen, die so ausgeführt sind, dass die betreffende Regelung über das Frischluftstellelement erfolgt.Preferably means are provided for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part of the dryer hood to a target value, which are designed so that the relevant control is carried out via the Frischluftstellelement.

Es können insbesondere auch wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils der Trockenhaube auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils der Trockenhaube vorgesehen sein.In particular, means for determining the respective operating state of the dry part of the drying hood on the basis of a temperature and / or pressure measurement in the area of the dry part of the drying hood can also be provided.

Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:

Fig. 1
eine schematische Darstellung einer beispielhaften Ausführungsform einer Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer Trockenhaube gemäß der Erfindung,
Fig. 2
eine schematische Darstellung einer beispielhaften Ausführungsform einer Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer Trockenhaube gemäß einer weiteren erfinderischen Idee
Fig. 3
eine schematische Darstellung einer beispielhaften Ausführungsform einer Vorrichtung zum Steuern und/oder Regeln eines Prozessluftsystems einer Trockenhaube gemäß einer weiteren erfinderischen Idee.
The invention will be explained in more detail below with reference to exemplary embodiments with reference to the drawing; in this show:
Fig. 1
1 a schematic representation of an exemplary embodiment of an apparatus for controlling and / or regulating a process air system of a drying hood according to the invention,
Fig. 2
a schematic representation of an exemplary embodiment of an apparatus for controlling and / or regulating a process air system of a drying hood according to another inventive idea
Fig. 3
a schematic representation of an exemplary embodiment of an apparatus for controlling and / or regulating a process air system of a drying hood according to another inventive idea.

Fig. 1 zeigt in schematischer Darstellung eine beispielhafte Ausführungsform einer Vorrichtung 10 zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder 12, insbesondere Yankeezylinder, zugeordneten Trockenhaube 14, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn. Fig. 1 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system a drying cylinder 12, in particular Yankee cylinder, associated drying hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web.

Die Vorrichtung 10 umfasst einen einem Nassteil 16 der Trockenhaube 14 zugeordneten ersten Brenner 18 und ein erstes Kanalsystem 20, über das dem Nassteil 16 heiße Luft aus dem ersten Brenner 18 zuführbar und Rückluft aus dem Nassteil 16 zu dem ersten Brenner 18 zurückführbar ist, einen einem Trockenteil 22 der Trockenhaube 14 zugeordneten zweiten Brenner 24 und ein zweites Kanalsystem 26, über das dem Trockenteil 22 heiße Luft aus dem zweiten Brenner 24 zuführbar und Rückluft aus dem Trockenteil 22 zu dem zweiten Brenner 24 zurückführbar ist.The device 10 comprises a first part 18 of the dryer hood 14 associated with the first burner 18 and a first channel system 20 via which the wet part 16 hot air from the first burner 18 can be fed and return air from the wet part 16 to the first burner 18 is attributable to a Dry part 22 of the dryer hood 14 associated second burner 24 and a second channel system 26, via which the dry part 22 hot air from the second burner 24 can be supplied and return air from the dry part 22 to the second burner 24 is traceable.

Die Vorrichtung 10 umfasst überdies einen Wärmetauscher 28, dem Abluft aus dem Nassteil 16 und Abluft aus dem Trockenteil 22 der Trockenhaube 14 zuführbar ist, ein Abluftgebläse 30 zum Abführen der aus dem Wärmetauscher 28 wieder austretenden Abluft an die Umgebung bzw. die Produktionshalle, einen Kanal 32, über den durch den Wärmetauscher 28 vorgewärmte Frischluft dem ersten Brenner 18 und dem zweiten Brenner 24 zuführbar ist, Feuchtesensoren 34, 36 zur Messung der Feuchte der Rückluft aus dem Nassteil 16 und der Feuchte der Rückluft aus dem Trockenteil 22 der Trockenhaube 14, Mittel zur Steuerung des Durchflusses des Abluftgebläses 30 in Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil 16 bzw. 22 mit der relativ höheren Wasserverdampfung, bei dem es sich in der Regel um den Nassteil 16 handelt, und Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils 16 und/oder des Trockenteils 22 der Trockenhaube 14 über die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher 28 zu dem dem Nassteil 16 bzw. Trockenteil 22 der Trockenhaube 14 zugeordneten ersten bzw. zweiten Brenner 18 auf einen vorgebbaren Sollwert.The device 10 further comprises a heat exchanger 28, the exhaust air from the wet part 16 and exhaust air from the dry part 22 of the drying hood 14 can be supplied, an exhaust fan 30 for discharging the exiting the heat exchanger 28 exhaust air to the environment or the production hall, a channel 32, via the preheated by the heat exchanger 28 fresh air to the first burner 18 and the second burner 24 can be fed, humidity sensors 34, 36 for measuring the humidity of the return air from the wet part 16 and the humidity of the return air from the dry part 22 of the dryer hood 14, means for controlling the flow rate of the exhaust fan 30 as a function of the humidity of the return air from the dryer hood part 16 or 22 with the relatively higher water evaporation, which is usually the wet part 16, and means for controlling the supplied by the ratio of to air mass flow determined certain air balance of the Nässeils 16 and / or the Trocke Part 22 of the drying hood 14 via the supply of preheated fresh air from the heat exchanger 28 to the wet part 16 and dry part 22 of the dryer hood 14 associated first and second burners 18 to a predetermined target value.

Der dem Wärmetauscher 28 aus dem Nassteil 16 der Trockenhaube 14 zugeführte Abluftmassenstrom ist über ein Abluftstellelement 38 und der dem Wärmetauscher 28 aus dem Trockenteil 22 der Trockenhaube 14 zugeführte Abluftmassenstrom über ein Abluftstellelement 40 steuerbar. Bei den Abluftstellelementen 38, 40 kann es sich jeweils insbesondere um eine Abluftklappe oder dergleichen handeln.The exhaust air mass flow supplied to the heat exchanger 28 from the wet part 16 of the drying hood 14 can be controlled via an exhaust air control element 38 and the exhaust air mass flow supplied to the heat exchanger 28 from the dry part 22 of the drying hood 14 via an exhaust air control element 40. The exhaust air control elements 38, 40 may in each case in particular be an exhaust air flap or the like.

Der dem dem Nassteil 16 der Trockenhaube 14 zugeordneten ersten Brenner 18 aus dem Wärmetauscher 28 zugeführte vorgewärmte Frischluftmassenstrom ist über ein Frischluftstellelement 42 und der dem dem Trockenteil 22 der Trockenhaube 14 zugeordneten zweiten Brenner 24 aus dem Wärmetauscher 28 zugeführte vorgewärmte Frischluftmassenstrom über ein Frischluftstellelement 44 steuerbar. Bei diesen Frischluftstellelementen 42, 44 kann es sich insbesondere jeweils um eine Frischluftklappe oder dergleichen handeln.The preheated fresh air mass flow supplied to the wet part 16 of the drying hood 14 from the heat exchanger 28 can be controlled via a fresh air control element 44 and the preheated fresh air mass flow supplied to the second burner 24 from the heat exchanger 28 to the dry part 22 of the drying hood 14. These fresh air control elements 42, 44 may in each case in each case be a fresh air flap or the like.

Die Mittel zur Steuerung des Durchflusses des Abluftgebläses 30 in Abhängigkeit von der Feuchte der Rückluft aus dem Trockenhaubenteil 16 bzw. 22 mit der relativ höheren Wasserverdampfung, üblicherweise dem Nassteil 16, können zur entsprechenden Steuerung des Durchflusses des Abluftgebläses 30 bei vollständig geöffnetem Abluftstellelement 38 zur Steuerung des dem Wärmetauscher 28 aus dem Nassteil 16 der Trockenhaube 14 zugeführten Abluftmassenstroms ausgeführt sein.The means for controlling the flow of the exhaust fan 30 as a function of the humidity of the return air from the dryer hood part 16 and 22 with the relatively higher water evaporation, usually the wet part 16, for the corresponding control of the flow of the exhaust fan 30 at fully open Abluftstellelement 38 for control the exhaust air mass flow supplied to the heat exchanger 28 from the wet part 16 of the drying hood 14.

Die Mittel zur Regelung der Luftbilanz des Nassteils 16 der Trockenhaube 14 können insbesondere so ausgeführt sein, dass zur Regelung der Luftbilanz des Nassteils 16 die Zufuhr an vorgewärmter Frischluft aus dem Wärmetauscher 28 zu dem dem Nassteil 16 zugeordneten ersten Brenner 18 über das diesem Brenner 18 zugeordnete Frischluftstellelement 42 entsprechend reguliert wird.The means for regulating the air balance of the wet part 16 of the drying hood 14 can be designed in particular such that for controlling the air balance of the wet part 16, the supply of preheated fresh air from the heat exchanger 28 to the first burner 18 associated with the wet part 16 via that burner 18 associated Frischluftstellelement 42 is regulated accordingly.

Es können insbesondere auch Mittel zur Temperatur- und/oder Druckmessung im Bereich des Nassteils 16 der Trockenhaube 14 sowie Mittel zur Bestimmung des jeweiligen Betriebszustands des Nassteils 16 der Trockenhaube 14 auf der Basis der erfolgten Temperatur- und/oder Druckmessung vorgesehen sein.In particular, means for measuring the temperature and / or pressure in the region of the wet part 16 of the drying hood 14 as well as means for determining the respective operating state of the wet part 16 of the drying hood 14 on the basis of the temperature and / or pressure measurement can be provided.

Es können auch Mittel zur Steuerung und/oder Regelung der Feuchte der Rückluft aus dem Trockenteil 22 der Trockenhaube 14 über das dem Trockenteil 22 zugeordnete Abluftstellelement 40 vorgesehen sein.It is also possible to provide means for controlling and / or regulating the humidity of the return air from the dry part 22 of the drying hood 14 via the exhaust air actuating element 40 assigned to the dry part 22.

Überdies können auch Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils 22 der Trockenhaube 14 auf einen Sollwert vorgesehen sein, die so ausgeführt sind, dass die betreffende Regelung über das dem zweiten Brenner 24 für den Trockenteil 22 zugeordnete Frischluftstellelement 44 erfolgt.Moreover, means for controlling the determined by the ratio of supplied to discharged air mass flow air balance of the dry part 22 of the dryer hood 14 may be provided to a target value, which are designed so that the relevant scheme on the second burner 24 for the dry part 22 associated Frischluftstellelement 44 takes place.

Zudem können Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils 22 der Trockenhaube 14 auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils 22 der Trockenhaube 14 vorgesehen sein.In addition, means for determining the respective operating state of the drying part 22 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the dry part 22 of the drying hood 14 may be provided.

Wie anhand der Fig. 1 zu erkennen ist, können die Kanalsysteme 20, 26 auch jeweils ein dem betreffenden Brenner 18 bzw. 24 vorgeschaltetes Gebläse 46 bzw. 48 enthalten.As based on the Fig. 1 can be seen, the channel systems 20, 26 each include a respective burner 18 and 24 upstream fan 46 and 48, respectively.

Beim vorliegenden Ausführungsbeispiel ist sowohl dem Nassteil 16 als auch dem Trockenteil 22 der Trockenhaube 14 jeweils ein Temperatursensor 60 bzw. 62 zugeordnet.In the present exemplary embodiment, both the wet part 16 and the dry part 22 of the drying hood 14 are each assigned a temperature sensor 60 or 62.

Bei diesem in der Fig. 1 dargestellten System handelt es sich um ein Parallelsystem.In this in the Fig. 1 shown system is a parallel system.

Fig. 2 zeigt in schematischer Darstellung eine beispielhafte Ausführungsform einer Vorrichtung 10 zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder 12, insbesondere Yankeezylinder, zugeordneten Trockenhaube 14, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, gemäß einer weiteren erfinderischen Idee. Fig. 2 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system of a drying cylinder 12, in particular Yankee cylinder, associated drying hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, according to another inventive idea.

Die Vorrichtung 10 umfasst einen einem Nassteil der Trockenhaube 14 zugeordneten ersten Brenner 18 und ein erstes Kanalsystem 20, über das dem Nassteil 16 heiße Luft aus dem ersten Brenner 18 zuführbar und Rückluft aus dem Nassteil 16 zu dem ersten Brenner 18 zurückführbar ist, einen einem Trockenteil 22 der Trockenhaube 14 zugeordneten zweiten Brenner 24 und ein zweites Kanalsystem 26, über das dem Trockenteil 22 heiße Luft aus dem zweiten Brenner 24 zuführbar und Rückluft aus dem Trockenteil 22 zu dem zweiten Brenner 24 zurückführbar ist.The apparatus 10 comprises a first burner 18 assigned to a wet part of the dryer hood 14 and a first duct system 20, via which hot air from the first burner 18 can be fed to the wet part 16 and return air from the wet part 16 can be returned to the first burner 18, a dry part 22 of the dryer hood 14 associated second burner 24 and a second channel system 26, via which the dry part 22 hot air from the second burner 24 can be supplied and return air from the dry part 22 to the second burner 24 is traceable.

Im vorliegenden Fall ist zwischen die Ausgänge des Nassteils 16 und des Trockenteils 22 der Trockenhaube 14 ein Kaskadenstellelement 50, insbesondere Kaskadenklappe oder dergleichen geschaltet.In the present case, a cascade actuating element 50, in particular a cascade flap or the like, is connected between the outputs of the wet part 16 and the dry part 22 of the drying hood 14.

Die Vorrichtung 10 umfasst überdies einen Wärmetauscher 28, dem über einen mit dem Ausgang des Nassteils 16 verbundenen Kanal 52 Abluft zuführbar ist, ein Abluftgebläse 30 zum Abführen der aus dem Wärmetauscher 28 wieder austretenden Abluft an die Umgebung, ein Frischluftstellelement 54, insbesondere Frischluftklappe oder dergleichen, über das durch den Wärmetauscher 28 vorgewärmte Frischluft einem zwischen dem Trockenteil 22 der Trockenhaube 14 und dem dem Trockenteil 22 zugeordneten zweiten Brenner 24 vorgesehenen Rückluftkanal 56 zuführbar ist, wenigstens einen Feuchtesensor 58 zur Messung zumindest der Feuchte der Rückluft aus dem Nassteil 16 der Trockenhaube 14 und/oder der Haubenabluft, Mittel zur Steuerung des Durchflusses des Abluftgebläses 30 in Abhängigkeit von der gemessenen Feuchte und insbesondere Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils 16 der Trockenhaube 14 über das Kaskadenstellelement 50 auf einen Sollwert.The apparatus 10 further comprises a heat exchanger 28, to which exhaust air can be supplied via a channel 52 connected to the outlet of the wet part 16, an exhaust fan 30 for discharging the exhaust air leaving the heat exchanger 28 to the environment, a fresh air control element 54, in particular a fresh air flap or the like in that fresh air preheated by the heat exchanger 28 can be supplied to a return air duct 56 provided between the drying section 22 of the drying hood 14 and the second burner 24 assigned to the drying section 22, at least one humidity sensor 58 for measuring at least the humidity of the return air from the wet section 16 of the drying hood 14 and / or the hood exhaust air, means for controlling the flow of the exhaust fan 30 depending on the measured humidity and in particular means for controlling the air balance of the wet part 16 of the dryer hood 14 via the cascade control element 50 determined by the ratio of supplied to discharged air mass flow to a desired value.

Dabei können auch wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Nassteils 16 der Trockenhaube 14 auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Nassteils 16 der Trockenhaube 14 vorgesehen sein.In this case, means for determining the respective operating state of the wet part 16 of the drying hood 14 can again be provided on the basis of a temperature and / or pressure measurement in the region of the wet part 16 of the drying hood 14.

Zudem kann die Vorrichtung 10 auch Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils 22 der Trockenhaube 14 auf einen Sollwert umfassen, die so ausgeführt sind, dass die betreffende Regelung über das Frischluftstellelement 54 erfolgt. Schließlich können insbesondere auch wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils 22 der Trockenhaube 14 in Abhängigkeit von einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils 22 der Trockenhaube 14 vorgesehen sein.In addition, the device 10 may also include means for controlling the determined by the ratio of supplied to dissipated air mass flow air balance of the dry part 22 of the dryer hood 14 to a target value, which are designed so that the relevant control via the Frischluftstellelement 54 takes place. Finally, in particular, means for determining the respective operating state of the drying section 22 of the drying hood 14 as a function of a temperature and / or pressure measurement in the region of the drying section 22 of the drying hood 14 may be provided.

Die beiden Kanalsysteme 20, 26 enthalten auch jeweils wieder ein dem betreffenden Brenner 18 bzw. 24 vorgeschaltetes Gebläse 46 bzw. 48.The two channel systems 20, 26 also each contain a respective burner 18 or 24 upstream fan 46 and 48, respectively.

Bei diesem in der Fig. 2 dargestellten System handelt es sich um ein Kaskadensystem.In this in the Fig. 2 The system shown is a cascade system.

Fig. 3 zeigt in schematischer Darstellung eine beispielhafte Ausführungsform einer Vorrichtung 10 zum Steuern und/oder Regeln eines Prozessluftsystems einer einem Trockenzylinder 12, insbesondere Yankeezylinder, zugeordneten Trockenhaube 14, insbesondere Yankeehaube, einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier-, Karton- oder Tissuebahn, gemäß einer weiteren erfinderischen Idee. Fig. 3 shows a schematic representation of an exemplary embodiment of an apparatus 10 for controlling and / or regulating a process air system of a drying cylinder 12, in particular Yankee cylinder, associated dryer hood 14, in particular Yankee hood, a machine for producing a fibrous web, in particular paper, board or tissue web, according to a further inventive idea.

Die Vorrichtung 10 umfasst einen einem Nassteil 16 und einem Trockenteil 22 der Trockenhaube 14 zugeordneten gemeinsamen Brenner 64, ein Kanalsystem 66, über das dem Nassteil 16 und dem Trockenteil 22 der Trockenhaube 14 jeweils heiße Zuluft aus dem Brenner 64 zuführbar und Rückluft aus dem Nassteil 16 und Rückluft aus dem Trockenteil 22 der Trockenhaube 14 zu dem Brenner 64 zurückführbar ist, ein zwischen die Ausgänge des Nassteils 16 und des Trockenteils 22 der Trockenhaube 14 geschaltetes Kaskadenelement 50, insbesondere Kaskadenklappe oder dergleichen, eine Wärmetauscher 28, dem über einen mit dem Ausgang des Nassteils 16 verbundenen Kanal 52 Abluft zuführbar ist, ein Abluftgebläse 30 zum Abführen der aus dem Wärmetauscher 28 wieder austretenden Luft an die Umgebung bzw. die Prozesshalle, ein Frischluftstellelement 54, insbesondere Frischluftklappe oder dergleichen, über das durch den Wärmetauscher 28 vorgewärmte Frischluft einem zwischen dem Trockenteil 22 der Trockenhaube 14 und dem Brenner 64 vorgesehenen Rücklaufkanal zuführbar ist und wenigstens einen Feuchtemesser 58 zur Messung zumindest der Feuchte der Rückluft aus dem Nassteil 16 der Trockenhaube 14 und/oder der Haubenabluft.The apparatus 10 comprises a common burner 64, a channel system 66, assigned to a wet part 16 and a drying part 22 of the drying hood 14, via which hot supply air from the burner 64 can be supplied to the wet part 16 and the dry part 22 of the drying hood 14 and return air from the wet part 16 and return air from the dry part 22 of the drying hood 14 to the burner 64 is traceable, a between the outputs of the Naßtils 16 and the dry part 22 of the dryer hood 14 switched cascade element 50, in particular cascade flap or the like, a heat exchanger 28, the one with the output of the Nässeils 16 connected channel 52 exhaust air can be supplied, an exhaust fan 30 for discharging the exiting from the heat exchanger 28 air to the environment or the process hall, a fresh air control element 54, in particular fresh air damper or the like, via the preheated by the heat exchanger 28 fresh air one between the Dry part 22 of the Tro Cover hood 14 and the burner 64 provided return channel can be fed and at least one moisture meter 58 for measuring at least the humidity of the return air from the wet end 16 of the dryer hood 14 and / or the exhaust hood.

Die dem Nassteil 16 und dem Trockenteil 22 der Trockenhaube 14 zugeführte heiße Luft aus dem Brenner 64 ist jeweils über ein Stellelement 70 bzw. 72 einstellbar.The hot air from the burner 64 supplied to the wet part 16 and the dry part 22 of the drying hood 14 can be adjusted via an adjusting element 70 or 72.

Überdies umfasst die Vorrichtung 10 Mittel zur Steuerung des Durchflusses des Abluftgebläses 30 in Abhängigkeit von der gemessenen Feuchte und Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Nassteils der Trockenhaube 14 über das Kaskadenstellelement 50 auf einen Sollwert.Moreover, the device 10 comprises means for controlling the flow of the exhaust fan 30 as a function of the measured humidity and means for controlling the air balance of the wet part of the drying hood 14 determined by the ratio of supplied to discharged air mass flow to a setpoint value via the cascade control element 50.

Darüber hinaus können insbesondere auch wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Nassteils 16 der Trockenhaube 14 auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Nassteils 16 der Trockenhaube 14 vorgesehen sein.In addition, means for determining the respective operating state of the wet part 16 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the wet part 16 of the drying hood 14 can in particular also be provided.

Die Vorrichtung 10 kann insbesondere auch Mittel zur Regelung der durch das Verhältnis von zugeführtem zu abgeführtem Luftmassenstrom bestimmten Luftbilanz des Trockenteils 22 der Trockenhaube 14 auch einen Sollwert umfassen, die so ausgeführt sind, dass die betreffende Regelung über das Frischluftstellelement 54 erfolgt.The device 10 may also include, in particular, means for regulating the air balance of the dry part 22 of the drying hood 14, which is determined by the ratio of supplied to discharged air mass flow, also a desired value, which is designed such that the relevant control takes place via the fresh air control element 54.

Schließlich kann die Vorrichtung 10 auch wieder Mittel zur Bestimmung des jeweiligen Betriebszustands des Trockenteils 22 der Trockenhaube 14 auf der Basis einer Temperatur- und/oder Druckmessung im Bereich des Trockenteils 22 der Trockenhaube 14 umfassen.Finally, the device 10 can again comprise means for determining the respective operating state of the drying part 22 of the drying hood 14 on the basis of a temperature and / or pressure measurement in the region of the dry part 22 of the drying hood 14.

Auch im vorliegenden Fall ist sowohl dem Nassteil 16 als auch dem Trockenteil 22 der Trockenhaube 14 jeweils wieder ein Temperatursensor 60 bzw. 62 zugeordnet.Also in the present case, both the wet part 16 and the dry part 22 of the drying hood 14 are each assigned a temperature sensor 60 or 62 again.

Das Kanalsystem 66 enthält auch wieder ein dem Brenner 64 vorgeschaltetes Gebläse 68.The channel system 66 also includes a burner 64 upstream of the blower 68 again.

Bei diesem in dieser Fig. 3 dargestellten System handelt es sich um ein Monosystem.At this in this Fig. 3 The system shown is a mono system.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Vorrichtungcontraption
1212
Trockenzylinderdrying cylinders
1414
TrockenhaubeTrockenhaube
1616
Nassteilwet part
1818
erster Brennerfirst burner
2020
erstes Kanalsystemfirst channel system
2222
Trockenteildry area
2424
zweiter Brennersecond burner
2626
zweites Kanalsystemsecond channel system
2828
Wärmetauscherheat exchangers
3030
Abluftgebläseexhaust fan
3232
Kanalchannel
3434
Feuchtesensorhumidity sensor
3636
Feuchtesensorhumidity sensor
3838
Abluftstellelement, AbluftklappeExhaust air control element, exhaust air flap
4040
Abluftstellelement, AbluftklappeExhaust air control element, exhaust air flap
4242
Frischluftstellelement, FrischluftklappeFresh air control element, fresh air flap
4444
Frischluftstellelement, FrischluftklappeFresh air control element, fresh air flap
4646
Gebläsefan
4848
Gebläsefan
5050
Kaskadenstellelement, KaskadenklappeCascade actuator, cascade damper
5252
Kanalchannel
5454
Frischluftstellelement, FrischluftklappeFresh air control element, fresh air flap
5656
RücklaufkanalReturn channel
5858
Feuchtesensorhumidity sensor
6060
Temperatursensortemperature sensor
6262
Temperatursensortemperature sensor
6464
Brennerburner
6666
Kanalsystemchannel system
6868
Gebläsefan
7070
Stellelementactuator
7272
Stellelementactuator

Claims (9)

  1. Method for controlling and/or regulating a process air system of a dryer hood (14), in particular a yankee hood, that is assigned to a drying cylinder (12), in particular a yankee cylinder, of a machine for producing a fibrous web, in particular a paper web, cardboard web, or tissue web, in which method hot air from a burner (18 or 24, respectively) is fed in each case to a wet part (16) and to a dry part (22) of the dryer hood (14); return air from the wet part (16) and return air from the dry part (24) of the dryer hood (14) is in each case returned to the respective burner (18 or 24, respectively); exhaust air from the wet part (16) and exhaust air from the dry part (22) of the dryer hood (14) is fed to a heat exchanger (28), in particular to a common heat exchanger (28); the exhaust air again exiting the heat exchanger (28) is discharged to the environment by way of an exhaust air blower (30); and fresh air that is preheated by the heat exchanger (28) is fed to that burner (18) that is assigned to the wet part (16) of the dryer hood (14) and/or to that burner (24) that is assigned to the dry part (22) of the dryer hood (14); the humidity of the return air from the wet part (16) and the humidity of the return air from the dry part (22) of the dryer hood (14) is in each case measured; the throughput of the exhaust air blower (30) is controlled so as to depend on the humidity of the return air from that dryer hood part (16 or 22) that has the relatively higher water evaporation; and the air balance of the wet part (16) and/or of the dry part (22) of the dryer hood (14), determined by the ratio of the infed air mass flow to the discharged air flow, is in each case regulated to a predefinable nominal value by way of the infeed of preheated fresh air from the heat exchanger (28) to that burner (18 or 22, respectively) that is assigned to the wet part (16) or the dry part (22), respectively, of the dryer hood (14).
  2. Method according to Claim 1,
    characterized in that the exhaust air mass flow that is fed from the wet part (16) of the dryer hood (14) to the heat exchanger (30), and/or the exhaust air mass flow that is fed from the dry part (22) of the dryer hood (14) to the heat exchanger (28), are/is in each case controlled by means of an exhaust air actuator element (38 or 40, respectively), in particular an exhaust air flap.
  3. Method according to Claim 1 or 2,
    characterized in that the preheated fresh air mass flow that is fed from the heat exchanger (28) to that burner (18) that is assigned to the wet part (16) of the dryer hood (14), and/or the preheated fresh air mass flow that is fed from the heat exchanger (28) to that burner (24) that is assigned to the dry part (22) of the dryer hood (14), are/is in each case controlled by means of a fresh air actuator element (42 or 44, respectively), in particular a fresh air flap.
  4. Method according to Claim 2 or 3,
    characterized in that the controlling of the throughput of the exhaust air blower (30) is performed so as to depend on the humidity of the return air from that dryer hood part (16 or 22, respectively) that has the relatively higher water evaporation at a completely opened exhaust air actuator element (38) for controlling the exhaust air mass flow that is fed from the wet part (16) of the dryer hood (14) to the heat exchanger (28).
  5. Method according to at least one of the preceding claims,
    characterized in that the humidity of the return air from the dry part (22) of the dryer hood (14) is controlled and/or regulated by means of that exhaust air actuator element (40) that is assigned to the dry part (22).
  6. Method according to at least one of the preceding claims,
    characterized in that the air balance of the dry part (22) of the dryer hood (14) that is determined by the ratio of the infed air mass flow to the discharged air mass flow is regulated to a nominal value by means of the fresh air actuator element (44) that is assigned to the burner (24) for the dry part (22).
  7. Method according to at least one of the preceding claims,
    characterized in that the respective operating state of the wet part (16) of the dryer hood (14) is determined by a temperature measurement and/or a pressure measurement in the region of the wet part of the dryer hood.
  8. Method according to Claim 7,
    characterized in that the air balance of the dry part (22) of the dryer hood (14) that is determined by the ratio of the infed air mass flow to the discharged air mass flow is regulated to a nominal value by means of the fresh air actuator element (54).
  9. Device (10) for controlling and/or regulating a process air system of a dryer hood (14), in particular a yankee hood, that is assigned to a drying cylinder (12), in particular a yankee cylinder, of a machine for producing a fibrous web, in particular a paper web, cardboard web, or tissue web, in particular for carrying out the method according to one of Claims 1 to 8, said device having a first burner (18) that is assigned to a wet part (16) of the dryer hood (14), and a first duct system (20) by way of which hot air from the first burner (18) is capable of being fed to the wet part (16), and returne air from the wet part (16) is capable of being return to the first burner (18); a second burner (24) that is assigned to a dry part (22) of the dryer hood (14), and a second duct system (26) by way of which hot air from the second burner (24) is capable of being fed to the dry part (22), and return air from the dry part (22) is capable of being returned to the second burner (24); a heat exchanger (28) to which exhaust air from the wet part (16) and exhaust air from the dry part (22) of the dryer hood (14) is capable of being fed; an exhaust air blower (30) for discharging the exhaust air that again exits the heat exchanger (28) to the environment; a duct (32) by way of which fresh air that is preheated by the heat exchanger (28) is capable of being fed to the first burner (18) and to the second burner (24), characterized by humidity sensors (34, 36) for measuring the humidity of the return air from the wet part (16) and the humidity of the return air from the dry part (22) of the dryer hood (14); means for controlling the throughput of the exhaust air blower (30) so as to depend on the humidity of the return air from the dryer hood part (16 or 22, respectively) having the relatively higher water evaporation; and means for regulating the air balance of the wet part (16) and/or of the dry part (22) of the dryer hood (14), determined by the ratio of the infed air mass flow to the discharged air mass flow, to a predefinable nominal value, in each case by way of the infeed of preheated fresh air from the heat exchanger (28) to the first burner or second burner, respectively (18 or 24, respectively), that is assigned to the wet part (16) or the dry part (22), respectively, of the dryer hood (14).
EP17198199.6A 2015-04-08 2016-04-07 Process air system Active EP3309294B1 (en)

Applications Claiming Priority (2)

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DE102015204305 2015-04-08
EP16164156.8A EP3078772A3 (en) 2015-04-08 2016-04-07 Process air system

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SE541292C2 (en) * 2017-02-02 2019-06-11 Valmet Oy A machine for making a tissue paper web and a method of operating such a machine
DE102017127664A1 (en) * 2017-11-23 2019-05-23 Voith Patent Gmbh PROCESS AIR SYSTEM
DE102019125408A1 (en) * 2019-09-20 2021-03-25 Voith Patent Gmbh Control and / or regulation of a process air system
CN111877045A (en) * 2020-08-28 2020-11-03 陕西炳智机械有限公司 Dry-wet separation hot air penetration drying equipment and process
IT202200005126A1 (en) * 2022-03-16 2023-09-16 Andritz Novimpianti S R L SYSTEM AND METHOD FOR THE CONTROL OF PROCESS FLUIDS IN A PLANT FOR THE PRODUCTION OF RIBBON-SHAPED PAPER MATERIAL
SE546211C2 (en) * 2022-06-01 2024-07-02 Valmet Oy A machine for producing a fibrous web

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ES2399034T3 (en) * 2008-10-24 2013-03-25 L.C. Paper 1881, S. A. Tissue paper drying machine with a cogeneration system
IT1395745B1 (en) 2009-09-16 2012-10-19 Novimpianti S R L DRYING AND DRYING SYSTEM FOR IMPLANTS FOR THE PRODUCTION OF AIR-SYSTEM WITH TAPE AND BOILER.
EP2896743B1 (en) * 2014-01-20 2016-06-29 Valmet S.p.A. A process and a machine for making a tissue paper web

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* Cited by examiner, † Cited by third party
Title
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EP3309294A1 (en) 2018-04-18
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