EP3000932B1 - Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production - Google Patents

Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production Download PDF

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Publication number
EP3000932B1
EP3000932B1 EP14186818.2A EP14186818A EP3000932B1 EP 3000932 B1 EP3000932 B1 EP 3000932B1 EP 14186818 A EP14186818 A EP 14186818A EP 3000932 B1 EP3000932 B1 EP 3000932B1
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EP
European Patent Office
Prior art keywords
gas
turbine
section
provision
reduced pressure
Prior art date
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EP14186818.2A
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German (de)
English (en)
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EP3000932A1 (fr
Inventor
Hermann Dr. Schwarz
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Siemens AG
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Siemens AG
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Priority to ES14186818.2T priority Critical patent/ES2666151T3/es
Priority to EP14186818.2A priority patent/EP3000932B1/fr
Publication of EP3000932A1 publication Critical patent/EP3000932A1/fr
Application granted granted Critical
Publication of EP3000932B1 publication Critical patent/EP3000932B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/20—Waste heat recovery
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts

Definitions

  • the invention relates to an apparatus and a method for treating or providing a base material and a production machine.
  • the production of paper is an energy-intensive process. Especially in the drying process of the paper web, high amounts of hot steam and / or air are currently needed. The drying process of the paper web is therefore very energy-consuming. Furthermore, paper machines and other production machines require vacuum pumps to provide reduced pressure.
  • the base paper is provided by pressing and then drying another base material, the pulp.
  • WO 03/978727 A2 shows the use of a turbine engine in a paper mill.
  • the combustion gases of the turbine engine are introduced into an impingement drying unit, while, inter alia, a pressure section is supplied with a negative pressure from the area in front of the turbine engine.
  • a pressure section is supplied with a negative pressure from the area in front of the turbine engine.
  • a method for treating and / or providing a base material, in particular a cellulosic material web preferably the provision of paper from a pulp-containing base substance (pulp), in particular in a paper machine, wherein a turbine both to provide a reduced pressure a gas as well as to provide an increased pressure of a gas.
  • the turbine serves as a suction device (providing a gas with reduced pressure) and / or as a blower (providing gas at elevated pressure).
  • the turbine also optionally provides gas at an elevated temperature.
  • the reduced pressure of the gas is used to support at least used a first process and the increased pressure of the gas used to support at least a second process.
  • the flow rate of the gas through the turbine is usually very high. Therefore, by means of a jet pump from a high flow rate of the gas, a region of gas of reduced pressure can be generated.
  • a jet pump can be used both before the entrance of the turbine and after the exit of the turbine.
  • the turbine sucks the gas into the turbine, thus reducing the pressure and generating the flow velocity of the gas.
  • the sucked gas is excreted again, that is, there is an increased pressure and a high flow velocity of the gas.
  • the temperature of the gas is increased after passing through the turbine compared to the incoming gas.
  • an apparatus for providing and / or treating a base material in particular for providing and / or drying a pulp-containing material web, preferably in a paper machine, a turbine, at least one dryer section, a cleaning section (wire cleaning section), a press section, a Wire section and optionally further process units on.
  • the turbine provides gas for the dryer section at an elevated temperature and pressure.
  • the turbine further provides gas at a reduced pressure for the wire cleaning section, to assist the press section, wire section, and / or optionally other process units.
  • the turbine represents a heater, a vacuum pump and a blower.
  • the press section (or a filter section or wire section) can be supported by gas with a reduced pressure.
  • a press section usually has a wet fiber fleece, which is replaced by a pick-up suction on the pressfile.
  • a production machine is understood here to mean a machine which, starting from a raw material, produces a base material or a product.
  • a production machine may be a paper machine, a food processing machine, a baking machine, a waste processing machine, a raw material processing machine, or the like.
  • a turbine is understood to mean, in particular, a gas turbine, e.g. for generating electrical energy.
  • the turbine may be part of a power plant associated with the production machine.
  • the turbine may also be part of a ventilation system, which is installed for the removal of process heat at a point of the production machine or the power plant.
  • the turbine is used as part of a power plant to convert a first form of energy, such as chemically bound energy, into a second form of energy, such as kinetic energy.
  • a first form of energy such as chemically bound energy
  • a second form of energy such as kinetic energy.
  • the kinetic energy can then be converted into electrical energy.
  • a turbine regularly has an inlet, wherein gas (vapor, air) is sucked / introduced.
  • a turbine also regularly has an outlet, wherein the gas sucked in through the inlet flows out / is discharged again.
  • a reduced pressure results as a pressure value of a gas which is below a normal pressure.
  • there is an increased pressure if the pressure is higher than the normal pressure.
  • normal pressure for example, the prevailing atmospheric pressure of the environment (about 1 bar) can be selected.
  • the gas At the outlet of the gas from the turbine, the gas usually has an elevated temperature.
  • the elevated temperature can be a few Kelvin up to hundreds of Kelvin, depending on the function and design of the turbine.
  • the gas exiting the turbine may further assist in the provision of steam.
  • the device as part of a production machine is well suited to reduce the energy consumption for the production of the product.
  • gas is provided at an elevated temperature by the turbine.
  • the gas After passing through gas through a turbine, the gas usually has a higher temperature than at the entrance of a turbine.
  • the heating of the gas takes place by waste heat of combustion, by friction and / or by adiabatic compression.
  • the elevated temperature gas may be used for processes such as aiding a dryer section, heating water and / or other base materials, or heating purposes.
  • the gas at the elevated temperature may also be used to generate electrical energy, e.g. serve with the help of at least one other turbine.
  • Such processes, which are assisted with gas of increased pressure, are also referred to herein as second processes.
  • the reduced pressure is provided by means of a jet pump.
  • a jet pump generates a suction effect by means of a flowing gas, ie a reduced pressure. Due to the suction effect gas is provided with a reduced pressure by means of a gas flow resistance. Although the so produced reduced pressure may not be sufficient for a first process, the jet pump can also be operated with flowing gas, which flows out at an outlet at the end of the turbine.
  • An advantage of using a jet pump, which is operated with the outflowing gas of the turbine, is that the gas sucked in with the jet pump can not get into the turbine.
  • the first process is a drying process, in particular a material web, the operation of a press section and / or a cleaning process, in particular a wire cleaning process.
  • a filter e.g., a filter section
  • a wire section e.g., a wire section
  • a drying process is the operation of a dryer section
  • a screening process is the operation of a wire section
  • a cleaning process is the operation of a screen cleaning process.
  • the drying process takes place in a drying section.
  • the dryer section thermally removes residual moisture in the (cellulosic) web (web) to a desired final dry content.
  • the screening process takes place in a wire section.
  • a wire section or filter section generates from an (cellulose-containing) suspension an endless web, in particular the cellulose-containing material web.
  • vacuum pumps are used for this purpose which consume a large amount of electrical energy.
  • a press section with gas of reduced or increased pressure, in particular at an elevated temperature of the gas is possible.
  • a Siebmasspartie also called Sieb lenderss.
  • a sieve cleaning section sprays the sieve with a liquid and sucks off the liquid and possibly the contamination of the sieve with the aid of vacuum pumps (reduced pressure).
  • vacuum pumps reduced pressure
  • maintenance-intensive vacuum pumps are required.
  • the invention significantly reduces the energy consumption of a production machine.
  • the second process is the loading of a cellulose-containing material web with the gas.
  • the admission of the material web with the gas, in particular the gas with an elevated temperature is advantageous. This procedure can save considerable amounts of energy.
  • the provision of the reduced pressure is effected by a jet pump.
  • a jet pump generates a reduced pressure by utilizing a flowing medium, here the flowing gas, driven by the turbine.
  • a jet pump can be used to produce a reduced pressure in a sieve cleaning section or in a wire section, possibly impurities can not get into the turbine advantageous.
  • the device has at least one jet pump for providing the reduced pressure of the gas.
  • the jet pump can be operated both with the flowing gas that flows into the turbine, as well as operated with the flowing gas that flows out of the same after the passage of the turbine. This means that the jet pump can be placed once before the entrance and / or after the exit of the turbine. If the jet pump is placed in front of the turbine, a filter may prevent the intake of sucked-in particles into the turbine.
  • the device has valves and a control device, wherein the control device is provided for controlling the valves and the control device controls the valves as needed of the at least one drying unit and / or the cleaning unit.
  • the control device is used, for example, to control the valves according to external specifications.
  • the valves are connected to the control device.
  • the controller controls via the opening of the valves the value of the reduced pressure for the first processes and the second processes which are supported.
  • the external specifications are advantageously based on a (current / determined) demand of the individual processes or parts supported (eg the dryer section).
  • valves are controlled as needed by the processes, with the conversion of the first form of energy into the second form of energy to be influenced only minimally by means of the turbine.
  • the valves are therefore advantageously controlled and / or regulated in such a way that, given a defined influence, the turbine achieves the maximum energy savings achieved by supporting the processes.
  • FIG. 1 shows a scheme for saving energy, especially thermal energy.
  • Energy is needed in the manufacture and processing of a (cellulosic) web 11 to provide gas G (eg, in the form of vapor) and to provide a gas G with increased pressure p2 and to provide a gas G with a reduced pressure p1.
  • gas G eg, in the form of vapor
  • gas G with increased pressure p2 e.g., in the form of vapor
  • a turbine in particular a gas turbine 1, which is provided for converting a first energy form E1 (eg chemically bound energy) into a second energy form E2 (eg kinetic energy for generating electrical energy by means of a generator) is used.
  • E1 eg chemically bound energy
  • E2 eg kinetic energy for generating electrical energy by means of a generator
  • the turbine 1 has an inlet for the incoming gas G (for example, for air or steam).
  • the turbine 1 further has an outlet for the gas G.
  • the turbine generates inflowing gas G of a flow velocity v1 and / or outflowing gas of a flow velocity v2.
  • the gas G which flows into the turbine 1, has a temperature T1.
  • the gas which flows out of the turbine 1 has a temperature T2.
  • the gas G usually has an elevated temperature T2 after flowing through the turbine 1, in comparison with the temperature T1 of the inflowing gas G.
  • the gas G, which is moved through the turbine 1, serves to support first processes 3a , 3b, 3c, ... and second processes 5a, 5b, 5c, ....
  • First processes are processes in which a gas flowing at a flow velocity v1 (entering the turbine) supports the process.
  • a suction effect can be used to transport liquids such as water.
  • a suction effect for receiving substances, in particular for cleaning a belt 9 or conveyor belt 9 serve.
  • the gas G flowing into the turbine 1 contributes to the provision of the gas at a reduced pressure p1.
  • the value of the reduced pressure p1 of the gas depends on the flow resistance of the inflowing gas G and the flow velocity v1 of the gas G.
  • the value of the increased pressure p2 of the gas depends on the flow resistance of the outflowing gas G and the flow velocity v2 of the gas G.
  • Second processes 5a, 5b, 5c, ... are processes in which an increased pressure p2, in particular coupled with an elevated temperature T2 of the gas flowing with the flow velocity v2, assists.
  • an increased temperature T2 of the gas G is advantageous, so that moisture / a liquid evaporates faster.
  • the turbine may be located in a power plant, for example, associated with a paper machine and / or located in close proximity.
  • a first process 3a, 3b, 3c, ... is a process supported by the provision of gas G of reduced pressure p1.
  • a first process 3a, 3b, 3c,... Can be a transport process, a cleaning process, the support of a press section or a (suction) process.
  • a second process 5a, 5b, 5c, ... is a process supported by the provision of gas G at an increased pressure p2.
  • a second process 5a, 5b, 5c,... Can be a transport process, a drying process (operation of a dryer section in a paper machine), a cleaning process (in the case of a paper machine, in particular a screen cleaning process), or a process for generating electrical energy.
  • FIG. 2 shows a dryer section TP or a press section PP as part of a production machine, in particular as part of a paper machine.
  • the turbine 1 is used to convert a first form of energy E1 to a second form of energy E2.
  • the turbine 1 serves to transport a gas G.
  • the gas G Before entering the turbine 1, the gas G has a speed v1, a reduced pressure p1 and a temperature T1.
  • the gas G has an increased pressure p2, a flow velocity v2 and an elevated temperature T2.
  • the prevailing before the turbine 1 reduced pressure p1 is used to support a first dryer section TP and / or press section.
  • a drying process 3a (by means of the first drying section TP) can also be dried by passing gas G.
  • a new filtering device for controlling the drying section TP, a valve 6 is used.
  • the gas After the turbine 1, the gas has a flow velocity v2, an increased pressure p2 and an elevated temperature T2. A portion of the gas G, which is present with the increased pressure p2 and the elevated temperature T2, serves to support a second drying process 5a by means of a further drying section TP.
  • the second drying process 5 a part of the gas G leaving the turbine 1 is directed onto the (cellulose-containing) material web 11.
  • the (cellulose-containing) material web 11 which runs on the belt 9, dried by the interaction with the gas G.
  • Further second processes 5b, 5c,..., In particular processes for papermaking, can also be assisted with the gas G flowing out of the turbine 1. For example, by means of the gas G water can be heated and thus the provision of water vapor can be supported.
  • the gas G emerging from the turbine 1 can also serve to generate electrical energy.
  • Another first process 3a may be the support of a sieve cleaning section SRP.
  • Valves 6 are advantageously used to distribute the gas G.
  • the valves are connected to a control device 7.
  • the control device 7 controls the intensity of the first processes 3a, 3b, 3c, ... and / or of the second processes 5a, 5b, 5c, 5d,...
  • FIG. 3 shows a further embodiment of a production machine, in particular a paper machine.
  • a first dryer section TP and a screen cleaning section SRP are shown.
  • the first dryer section TP is the same functionality as a press section PP shown, wherein the press section PP is supported by means of the gas G with reduced pressure p1.
  • a second drying section TP is shown, wherein the second drying section TP can also be characterized by the use of heated rollers.
  • the one drying section TP, as the first process 3a, is supported by gas G of a reduced pressure p1.
  • the gas G with the reduced pressure p1 is provided by a jet pump P.
  • Another first process 3b is the cleaning of the belt 9, on which the (cellulose-containing) material web 11 usually runs.
  • Such a process is also referred to as a screen cleaning process SRP in the area of a paper machine.
  • the web 9 is charged with water (H2O) and sucked off again by means of a gas G with a reduced pressure p1. In this case, if present particles are removed from the belt 9
  • the cleaning process 3b is then carried out if the web 9 is not acted upon by a (cellulose-containing) material web 11.
  • the control of the intensity of the first processes 3a, 3b is effected by valves 6.
  • the reduced pressure p1 can be set so that the drying section 3a, TP and / or the screen cleaning unit 3b, SRP function optimally.
  • the turbine further provides gas G having an increased pressure p2 and an elevated temperature T2 for at least a second process 5a, 5b, 5c,.
  • a drying section TP by means of gas-flowed rolls
  • the gas G in particular as a form of water vapor G, fed to two drying cylinders.
  • the drying cylinders as part of the dryer section TP act on the strip 9 and / or the (cellulose-containing) material web 11 and dry the (cellulose-containing) material web 11.
  • the portion of the gas G sufficient to support the dryer section TP is controlled / determined by the valve G. For example, based on a specific moisture content of the (cellulose-containing) material web 11, the supply of gas G controlled by means of the valve 6 and the control device 7 (not shown) are controlled.
  • cleaning of the belt 9 can be controlled by means of a screen cleaning section SRP (not shown) on the basis of the corresponding valve 6.
  • SRP screen cleaning section
  • the sieve cleaning section SRP and / or the drying section TP is a separator, in particular a water separator, arranged downstream.
  • a water separator can be arranged below the drying section TP, but is in the FIG. 3 indicated only by a section of a pipe.
  • the turbine 1 may be part of a power plant associated with the production machine for generating electrical energy.
  • As (pulp-containing) material web 11 may be a paper web before drying or after pressing.
  • FIG. 4 shows two different patterns of drying sections TP for a product strip 11. Also shown is a turbine 1, at the outlet of which the gas G exits with an increased pressure p2, a flow velocity v2 and an (elevated) temperature T2 and through a pipeline of further second processes, the shown drying processes 5a, 3a, is fed.
  • a turbine 1 at the outlet of which the gas G exits with an increased pressure p2
  • gas with a reduced pressure p1 can be provided by means of a jet pump P.
  • a portion of the gas G is supplied after exiting the turbine 1 of a first drying section TP.
  • the gas G with the elevated temperature T2 is directed onto the (cellulose-containing) product band 11 to be dried and serves to remove the moisture of the material web 11 by supplying heat and gas flow.
  • FIG. 5 shows an application of the invention to a paper machine.
  • the paper machine has, among other units and parts, a wire section SP, a wire-cleaning section SRP, a press section PP and at least one dryer section TP.
  • the (cellulose-containing) material web 11 passes through first the wire section SP, the press section PP and then the drying section TP.
  • the wire section SP and / or the Siebcurispartie SRP is supported with a gas G with reduced pressure p1, ie with a suction effect.
  • the gas G then passes through the turbine 1, possibly in mixture with another gas G from the environment.
  • the gas G is possibly provided with an increased pressure p1.
  • the gas G, which leaves the turbine 1, usually has an elevated temperature T2.
  • the gas G, which enters the turbine 1, has a flow velocity v1 and a temperature T1.
  • the gas G leaving the turbine has a flow velocity v2 and an increased pressure p2.
  • the gas G at the elevated temperature T2 exiting the turbine serves to support the dryer section TP.
  • the gas with the elevated temperature T2 and / or the increased pressure p2 and / or the flow velocity v2 serves for loading the (cellulose-containing) material web 11, which is transported on the belt 9.
  • the press section PP is advantageously supported by gas G with a reduced pressure p1.
  • a press section has a pickup suction.
  • the vacuum cleaner usually requires a supply of gas G with a reduced pressure p1.
  • the gas G with the reduced pressure p1 can be provided either by means of the jet pump P or directly through the turbine 1.
  • the gas G can also contribute to the outlet of the turbine 1 to support the Siebcurispartie SRP and / or to support the wire section SP.
  • the turbine 1 is advantageously located in a power plant for generating electrical energy E2.
  • an adjacent localized power plant is particularly advantageous in a paper machine.
  • the invention relates to a method and an apparatus for treating or providing a base material, eg paper, and a production machine.
  • the production machine is associated with a turbine 1, the turbine 1 providing both gas G with a reduced pressure p1 and gas G with an increased pressure p2 and possibly an elevated temperature T2.
  • the gas G with a reduced pressure p1 and the gas G with an increased pressure p2 in this case has a flow velocity v1, v2.
  • the gas G may be used to operate a jet pump to provide a reduced pressure p1.
  • the gas G of an elevated temperature T2 can serve for drying a (cellulose-containing) material web 11.
  • the gas G with the reduced pressure p1 and / or the jet pump can be used to operate a dryer section TP, 3a, 5a, a press section PP and / or a (sieve) cleaning section SRP serve.
  • the method and the device serve to save energy.

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  • Paper (AREA)

Claims (9)

  1. Procédé de traitement ou de préparation d'une substance de base, notamment d'une bande (11) de matière cellulosique, dans lequel on se sert d'une turbine (1), tant pour obtenir une diminution de la pression (p1) d'un gaz (G) et/ou que pour obtenir une augmentation de la pression (p2) d'un gaz (G), dans lequel
    - on utilise l'abaissement de la pression (p1) du gaz (G) pour favoriser au moins un premier processus (3a, 3b, 3c, ...) et
    - on utilise l'élévation de la pression (p2) du gaz (G) pour favoriser au moins un deuxième processus (5a, 5b, 5c, ... )
    caractérisé en ce que l'on obtient l'abaissement de la pression (p1) à l'aide d'un injecteur (P).
  2. Procédé suivant la revendication 1, caractérisé en ce que la turbine (1) sert tant à obtenir un abaissement de la pression (p1) d'un gaz (G), qu'également une élévation de la pression (p2) d'un gaz (G).
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que l'on prépare par la turbine (1) du gaz (G) ayant une élévation (T2) de température.
  4. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le premier processus (3a, 3b, ... ) est un processus (3a) de séchage, notamment de la bande (11) de matière, qui est un fonctionnement d'une partie de presse et/ou d'un processus (3b) d'épuration, notamment d'un processus (3b) d'épuration par tamisage.
  5. Procédé suivant l'une des revendications précédentes, caractérisé en ce que le deuxième processus (5a, 5b, 5c, ... ) consiste à soumettre la bande (11) de matière cellulosique au gaz (G).
  6. Installation de traitement ou de préparation d'une substance de base, notamment de production ou de traitement d'une bande (11) de matière cellulosique, de préférence dans une machine à papier, comportant une turbine (1), au moins une partie (TP) de séchage, une partie (SRP) d'épuration, notamment une partie (SRP) d'épuration par tamisage, ainsi que facultativement d'autres unités de processus, notamment une partie (PP) de presse ou une partie (SP) de tamisage, dans lequel, au moins pour favoriser la partie (SRP) d'épuration et/ou la partie (TP) de séchage, la préparation du gaz (G) est prévue avec une élévation de la pression (p2), un abaissement de la pression (p1) et/ou une élévation de la température (T2), la turbine (1) étant prévue pour obtenir l'abaissement de la pression (p1) du gaz (G) et/ou l'élévation de la pression (p2) du gaz (G), caractérisée en ce que l'installation a au moins un injecteur (P) pour obtenir l'abaissement de la pression (p1) du gaz (G).
  7. Installation suivant la revendication 6, caractérisée en ce que la turbine (1) est prévue pour obtenir un abaissement de la pression (p1) du gaz (G) ainsi qu'une élévation de la pression (p2) du gaz (G) ainsi que facultativement pour obtenir une élévation de la température (T2) du gaz.
  8. Installation suivant l'une des revendications 6 ou 7, caractérisée en ce que le dispositif a des vannes (6) et un système (7) de commande, le système (7) de commande étant prévu pour commander les vannes (6) et dans lequel le système (7) de commande est prévu pour commander les vannes (6) suivant qu'au moins une partie (3a, 5a, TP) de séchage et/ou la partie (3b, SRP) d'épuration a besoin d'une élévation de la température (T2), d'un abaissement de la pression (p1) et/ou d'une élévation de la pression (p2) du gaz (G).
  9. Machine de production, notamment pour produire une substance de base cellulosique, de préférence une machine à papier, ayant une installation suivant l'une des revendications 6 à 8.
EP14186818.2A 2014-09-29 2014-09-29 Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production Active EP3000932B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES14186818.2T ES2666151T3 (es) 2014-09-29 2014-09-29 Dispositivo y procedimiento para el tratamiento o la preparación de un material base, así como máquina de producción
EP14186818.2A EP3000932B1 (fr) 2014-09-29 2014-09-29 Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14186818.2A EP3000932B1 (fr) 2014-09-29 2014-09-29 Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production

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Publication Number Publication Date
EP3000932A1 EP3000932A1 (fr) 2016-03-30
EP3000932B1 true EP3000932B1 (fr) 2018-01-17

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EP14186818.2A Active EP3000932B1 (fr) 2014-09-29 2014-09-29 Dispositif et procédé de traitement ou de préparation d'une substance de base et machine de production

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ES (1) ES2666151T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI120366B (fi) * 2002-03-19 2009-09-30 Metso Paper Inc Menetelmä ja laitteisto käyttövoiman tuottamiseksi paperi- tai kartonkilaitoksessa
DE102009043861A1 (de) * 2009-08-26 2011-03-10 Schönfelder Papierfabrik GmbH Vorrichtung zur Bereitstellung von elektrischer Energie und Prozesswärme zur Verwendung bei der Papierherstellung
SE536108C2 (sv) 2010-11-16 2013-05-07 Andritz Tech & Asset Man Gmbh Torklåda som innefattar åtminstone två zoner för torkning av en cellulosamassabana
DE102010063239A1 (de) * 2010-12-16 2012-06-21 Voith Patent Gmbh Wärmerückgewinnung aus der Abluft einer Papier-, Karton-, Tissue- oder Faserbahn-Herstellungsmaschine

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ES2666151T3 (es) 2018-05-03

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