WO2022171640A1 - Production optimisée d'un produit à base de vieux papiers - Google Patents

Production optimisée d'un produit à base de vieux papiers Download PDF

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Publication number
WO2022171640A1
WO2022171640A1 PCT/EP2022/053051 EP2022053051W WO2022171640A1 WO 2022171640 A1 WO2022171640 A1 WO 2022171640A1 EP 2022053051 W EP2022053051 W EP 2022053051W WO 2022171640 A1 WO2022171640 A1 WO 2022171640A1
Authority
WO
WIPO (PCT)
Prior art keywords
waste paper
quantities
measuring system
paper
plant
Prior art date
Application number
PCT/EP2022/053051
Other languages
German (de)
English (en)
Inventor
Falk Albrecht
Linus FRIEDRICH
Axel Gommel
Eckhard Gutsmuths
Vera Loher
Sebastian Schuster
Sylvain Voiron
Wolfgang Müller
Original Assignee
Voith Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to EP22706025.8A priority Critical patent/EP4291710A1/fr
Publication of WO2022171640A1 publication Critical patent/WO2022171640A1/fr

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Classifications

    • 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
    • D21G9/0018—Paper-making control systems controlling the stock preparation
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to a method for controlling or regulating a plant for the production of a substance containing waste paper, comprising at least one conveyor belt, a measuring section, a measuring system and a dissolving device, the method comprising the following steps: transporting quantities of waste paper by means of a conveyor belt over the measuring section to the dissolving device; detecting at least one measured value of each of these amounts of waste paper by means of at least one optical measuring system on the measuring section; Assigning the at least one measured value to at least one physical property of the quantity of waste paper and quantifying a control value of the physical property on the basis of the at least one measured value.
  • Methods and systems for producing a substance containing waste paper are known, for example, from DE102008019839 A1.
  • DE102015118547 A1 for example, is also known.
  • a recyclable material flow containing waste paper is sorted with the help of sensors and the recording of physical properties. In this way, the various recyclable materials contained can be separated with a high sorting quality.
  • the object of the invention is to improve the quality of the substance containing waste paper and to improve the process stability of the plant for the production of the substance containing waste paper.
  • the aim is to control and/or regulate the following processing and production steps evenly and optimally, even with changing quality of the quantities of waste paper, to avoid production downtimes, to reduce reject rates and to produce a substance of defined quality containing waste paper.
  • control value is used to control and/or regulate one or more process parameters of the plant for the production of a material containing waste paper.
  • control parameter for the physical property of the paint regulates the number and performance of the cleaning stages, while at the same time a control parameter for the physical property of the input moisture regulates the consistency of the pulping device.
  • optical measuring system has proven to be particularly advantageous, since a large number of properties can be recorded here at the same time.
  • the optical measuring system can have sensors such as digital cameras, optical distance measurements and also contain lighting units and shields.
  • the shielding can be selected in such a way that environmental influences do not affect the measured values.
  • Experiments in connection with this invention have shown in particular that ambient light can lead to fluctuating exposures and measurement errors in digital cameras.
  • the conveyor belt has the task of transporting the quantities of waste paper over a measuring section to the pulping device.
  • transport devices that are comparable in their effect to the conveyor belt can also transport the quantities of waste paper over the measuring section to a dissolving device.
  • the optical measuring system has at least one digital camera and at least one lighting unit, suitable for recording at least one digital image of the quantities of waste paper and transmitting it to a computer.
  • the digital images contain a large number of physical properties of the quantities of waste paper. These can be determined, characterized and quantified, for example, via the color or gray values of the individual picture elements (pixels), or via structures contained in the digital image.
  • the digital image information is advantageously transmitted to a computer.
  • the computer In terms of the invention, it is irrelevant whether the computer is located directly at the plant for the production of a material containing waste paper or is connected to it via a network or the Internet.
  • the computer can be designed both as a physical device and as part of a system for data processing can be designed in virtualized form.
  • a method according to one of the claims is also advantageous, wherein the conveyor belt, the measuring section, the measuring system or the optical measuring system is suitable for determining the quantities of waste paper by determining the weight.
  • the weight is determined, for example using a scale, before the conveyor belt is loaded. It can also be advantageous to integrate a weighing function into the conveyor belt or the measuring section, or to enable indirect weight detection, for example via the power consumption of the conveyor belt. In addition, it can be advantageous to calculate the weight of the quantities of waste paper directly via the optical measurement of the measuring system, with information about the volume and density of the quantities of waste paper also being able to lead indirectly to the weight measurement.
  • optical measuring system is suitable for determining a volume of the quantities of waste paper by means of a distance or dimension measurement.
  • the optical measuring system can also include a laser distance measurement, for example.
  • Another distance sensor can also be integrated into the measuring system for the volume measurement, or the volume measurement can be carried out using image information for example, by simultaneously picking up the amounts of waste paper from different angles.
  • the density of the quantities of waste paper can advantageously be determined.
  • a determination of the separation of bales or waste paper containers can also be carried out.
  • the controlled variables, which can be quantified from the volume determination can, for example, control the energy input in the pulping device or waste paper drum.
  • the energy input is controlled, for example, via the rotational speed of the waste paper drum or the speed of an agitator in the pulping device.
  • a method according to one of the claims is also advantageous, wherein the optical measuring system is suitable for determining at least one of the following values of the quantities of waste paper by means of the at least one lighting unit and the at least one digital camera: contrast, gloss, color, color intensity and reflection.
  • the gloss of the quantities of waste paper is to be understood here as the proportion of directed light compared to the proportion of scattered light that the optical measuring system detects. Reflection values and color values can change the measured values of the optical measuring system via contrast values.
  • gloss values, color values and/or reflection values can advantageously be used in order, for example, to obtain a control value for the water content of the quantities of waste paper.
  • Gloss values can also be used to obtain information about the proportion of shiny impurities, and thus used as a control value for controlling and/or regulating scrap rates, which enables more efficient operation of the pulping device, pulping drum and/or stock preparation plant.
  • the mean value of the observed amount of waste paper can always be determined, or the distribution of the values within the recorded image.
  • a method according to one of the preceding claims is also advantageous, in which the assignment of the measured value of the optical measuring system to a physical property of the amount of waste paper, in particular the color or the color values of the amount of waste paper, is suitable for impurities and in particular the proportion of plastic particles and/or or brown waste paper.
  • the color value of the amounts of waste paper is suitable to be used as a quantified control value for a large number of process steps. For example, cleaning stages in stock preparation can be efficiently controlled and regulated.
  • the process parameters of the installation for producing a substance containing waste paper can also be regulated with the aid of the color values of the quantities of waste paper in such a way that the substance containing waste paper has the desired color.
  • the proportion of brown waste paper which consists of cardboard or packaging paper, for example, also determines the economic value and some of the physical properties of the quantities of waste paper.
  • a quantification of the control value based on the proportion of brown waste paper also enables an advantageous selection of the paper types that can be produced from the quantities of waste paper.
  • process parameters such as, for example, the recipe of the plant for the production of material containing waste paper can be regulated accordingly.
  • the recipe can include both the selection of additives and the proportions of individual intermediate products in stock preparation.
  • a method according to one of the preceding claims is also advantageous, in which the assignment of the amounts of waste paper to physical properties takes place in the computer using a software product, the measured values from the optical measuring system being used.
  • digital images and distance measurements can be transmitted to the computer, for further characterization a software product is used that uses pattern recognition methods to quantify the physical properties of the quantities of waste paper in control variables.
  • the software product can also include methods of so-called "machine learning" or artificial intelligence, which may require the software to be preset for regular operation using training data or reference images.
  • the software product is suitable for recognizing disturbing objects or impurities in the quantities of waste paper, in particular wire residues from used waste paper bales, by means of an image recognition method.
  • disturbing objects such as metal parts, wires or cords of the waste paper containers or waste paper bales can also be recognized by means of pattern recognition. With a higher number of these impurities, it may be necessary to completely or partially empty the pulping device, or to adjust the reject rate with the corresponding controlled variable.
  • a method according to one of the claims is also advantageous, in which the software product is suitable for carrying out a classification of the quantities of waste paper, in particular according to the classification of commercial classes.
  • a classification for example in trade classes or variety names, it may also be necessary to set the software using training data or calibration information.
  • Commercial grades such as EN643 include an industry-standard characterization of waste paper quality. This information has both economic importance for evaluating the amounts of waste paper used.
  • a classification according to trade classes also allows the production of substances containing waste paper with defined properties, proof of origin and brand names.
  • the quantities of waste paper include at least one assignment of one of the following physical properties: moisture, density, color, color distribution, degree of whiteness, proportion of mineral fillers, strength potential and / or proportion of different types of waste paper.
  • a characterization of different physical properties also allows further controlled variables to be derived from the combination of a number of different physical properties. This allows improved efficiency when controlling one or more process parameters of the plant for the production of a substance containing waste paper.
  • the quantities of waste paper include at least a quantification of a control value from one of the following physical properties: moisture, density, color, color distribution, degree of whiteness, proportion of mineral fillers, strength potential and / or proportion of different types of recovered paper.
  • the control value can be quantified in the form of percentage values, relative color values, absolute values or after scaling in a scaling that is customary for the physical property.
  • the corresponding quantification of the control value may be necessary for controlling the process parameters.
  • it may be necessary to carry out a calibration using defined test quantities, laboratory tests or reference measurements.
  • the control values which are determined via the water content of the quantities of waste paper, can be used here, for example, to achieve a uniform consistency of the suspension.
  • the energy input which can be regulated, for example, via the rotational speed of the pulping drum or the speed control of a pulping agitator, can be controlled or regulated directly with the control variables.
  • the regulation of process parameters can include both individual process parameters and higher-level controls and regulations, which in turn includes a large number of subordinate regulations and controls.
  • a method according to one of the preceding claims is also advantageous, in which the quantities of waste paper in the stock preparation plant are divided into at least two different intermediate products depending on the measured technological properties. By sorting the quantities and partial quantities of waste paper in the stock preparation, various intermediate products can be produced, which differ according to measured physical properties.
  • Intermediate products with different properties can then be used specifically for the production of various substances containing waste paper.
  • Such a fractionation into intermediate products can take place, for example, according to fiber length, proportion of fillers or fines, or color.
  • a substance containing waste paper comprises a paper production plant, wherein a paper or cardboard web is produced by a suitable selection of at least one of the intermediate products and additives.
  • the paper production recipe can be directly regulated or controlled with the control value.
  • the selection of additives such as for example, the addition of starch to increase strength can advantageously be controlled and/or regulated as a process parameter.
  • a method according to one of the preceding claims is also advantageous, in which the control and/or regulation of the process parameters of the paper production plant is also determined by at least one of the control values.
  • FIG. 1 shows a method for controlling or regulating a plant for preparing a material 1 containing waste paper, according to one of the claims.
  • FIG. 2 shows a further method for controlling or regulating a plant for preparing a material 1 containing waste paper, according to one of the claims.
  • FIG. 1 shows a schematic representation, not to scale, of a method according to the invention for controlling and/or regulating a plant for the drying of a material 1 containing waste paper according to one of the claims.
  • the quantities of waste paper 2 are first placed on the conveyor belt 3, and they can be removed from an interim storage facility, not shown, or delivered directly to the conveyor belt 3 as bales, for example.
  • the quantities of waste paper 2 are then conveyed past the measuring system 5 on the conveyor belt 3 via the measuring section 4 .
  • the measuring system 5 can protect the optical measuring system 7 from disruptive light influences by means of the shielding shown.
  • the optical measuring system 7 images of the amounts of waste paper 2 are shown in FIG. 1 from at least two defined angles two digital cameras 10 added.
  • the use of the second and any further digital cameras not shown are optional for the invention.
  • the optical measuring system 7 also includes two different optional lighting units 11, with which the amounts of waste paper 2 are exposed in a targeted manner in order to enable a uniform optical measurement.
  • the recorded images are transmitted as measured values to a computer 12 for evaluation using a software product 13 .
  • the measured values are assigned from the images to at least one physical property of the amount of waste paper 2 and a control value 8 is quantified.
  • the optical measuring system can also contain an optional distance measurement that is not shown.
  • Control value 8 can be used to control and regulate these parameters.
  • waste paper 2 in suspension are now cleaned in a stock preparation plant 17 in a large number of process steps 18 and their consistency is adjusted.
  • the individual process parameters 9 can be controlled and regulated using the control values 8 .
  • the quantities of waste paper 2 can be divided according to the control values 8 into different intermediate products 19 which, for example, have a different strength potential, or can be sorted according to other different physical properties.
  • a paper web can then be produced from these intermediate products 19 and additives 21 in a paper production plant 20 .
  • a suitable recipe can be selected from the intermediate products 19 and additives 20, it also being possible here to use control values 8 to adapt the recipe.
  • individual process parameters 9 can be controlled and/or regulated by means of the control values 8 in the paper production plant 20 .
  • FIG. 2 shows a schematic representation, not to scale, of a further method for controlling and/or regulating a plant for the production of a substance 1 containing waste paper, according to one of the claims.
  • the quantities of waste paper 2 are first placed on the conveyor belt 3, while these can be removed from an intermediate storage facility, not shown, or be delivered as bales, for example.
  • the quantities of waste paper are then conveyed past the first measuring system 5 on the conveyor belt 3 via the first measuring section 4 .
  • the first measuring system 5 can include a first shield in order to protect a first optical measuring system 7 from interfering light influences. With the optical measuring system 7, images of the quantities of waste paper 2 are recorded in FIG.
  • the recorded images are transmitted as measured values to the computer 12 for evaluation using the software product 13 .
  • the measured values are assigned from the images to at least one physical property of the amount of waste paper 2 and a control value 8 is quantified.
  • the amounts of waste paper 2 are then pre-processed in a first process step, for example bale opening 22, in which case in particular bundles are loosened, for example by removing wire, the amounts of waste paper 2 can be loosened and separated.
  • a first process step for example bale opening 22, in which case in particular bundles are loosened, for example by removing wire, the amounts of waste paper 2 can be loosened and separated.
  • the quantities of waste paper 2 separated in this way can then optionally be guided past a second measuring system 5 via a second measuring section 4 with the conveyor belt 3 .
  • a second measuring system 5 can then optionally be guided past a second measuring system 5 via a second measuring section 4 with the conveyor belt 3 .
  • further images of the quantities of waste paper 2 can be recorded and transmitted as further measured values to the computer 12 for evaluation using the software product 13.
  • the second measuring system 5 has a distance measurement 23 which is suitable for determining the volume of the quantities of waste paper 2 after separation.
  • the quantities of waste paper 2 are mixed in the pulping drum 14, or in an optional pulping device not illustrated, by adding water 16 and introducing energy by rotating the pulping drum 14 to form a suspension. Contaminants contained in the quantities of waste paper 2 are removed from the opening drum 14 by means of a reject rate 15 .
  • Control value 8 can be used to control and regulate these parameters
  • the quantities of waste paper 2 can be divided according to the control values 8 into different intermediate products 19 which, for example, have a different strength potential, or can be sorted according to different optical properties.
  • a paper web can then be produced from these intermediate products 19 and additives 21 in a paper production plant 20 .
  • a suitable recipe can be selected from the intermediate products 19 and additives 20, it also being possible here to use control values 8 to adapt the recipe.
  • individual process parameters 9 can be controlled and/or regulated in the paper production plant 20 by means of the control values 8 .

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de commande en boucle ouverte ou en boucle fermée d'une installation de production d'un matériau à base de vieux papiers, comprenant au moins une bande transporteuse, une section de mesure, un système de mesure et un dispositif de désintégration, le procédé comprenant les étapes suivantes : le transport de quantités de vieux papiers au moyen de la bande transporteuse vers le dispositif de désintégration en passant par la section de mesure ; l'acquisition d'au moins une valeur de mesure de chacune de ces quantités de vieux papiers au moyen d'au moins un système de mesure optique sur la section de mesure ; l'attribution de ladite au moins une valeur de mesure à au moins une propriété physique de la quantité de vieux papiers et la quantification d'une valeur de commande de la propriété physique sur la base de ladite au moins une valeur de mesure. Le procédé selon l'invention est caractérisé en ce que, dans une étape supplémentaire du procédé, la valeur de commande est utilisée pour la commande en boucle ouverte et/ou en boucle fermée d'un ou plusieurs paramètres de processus de l'installation de production d'un matériau à base de vieux papiers.
PCT/EP2022/053051 2021-02-11 2022-02-09 Production optimisée d'un produit à base de vieux papiers WO2022171640A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22706025.8A EP4291710A1 (fr) 2021-02-11 2022-02-09 Production optimisée d'un produit à base de vieux papiers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021103233.4 2021-02-11
DE102021103233.4A DE102021103233A1 (de) 2021-02-11 2021-02-11 Optimierte Herstellung eines Altpapierprodukts

Publications (1)

Publication Number Publication Date
WO2022171640A1 true WO2022171640A1 (fr) 2022-08-18

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ID=80449148

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PCT/EP2022/053051 WO2022171640A1 (fr) 2021-02-11 2022-02-09 Production optimisée d'un produit à base de vieux papiers

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Country Link
EP (1) EP4291710A1 (fr)
DE (1) DE102021103233A1 (fr)
WO (1) WO2022171640A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116103947A (zh) * 2023-01-18 2023-05-12 安德里茨（中国）有限公司 浆包供给设备
DE102023133348A1 (de) 2022-11-30 2024-06-06 Voith Patent Gmbh Vorrichtung und Anordnung und Verfahren zum Umsetzen von Ballen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022126745A1 (de) 2022-10-13 2024-04-18 Voith Patent Gmbh Verfahren zum Betrieb eines Pulpers zur Erzeugung einer Suspension, insbesondere einer Fasersuspension

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653477A1 (de) * 1996-12-20 1998-06-25 Siemens Ag Verfahren und Vorrichtung zur Prozeßführung bei der Herstellung von Papier
DE102005002638A1 (de) * 2005-01-20 2006-07-27 Voith Paper Patent Gmbh Aschebestimmung
DE102008019839A1 (de) 2008-04-19 2009-10-22 Voith Patent Gmbh Verfahren zur Entfernung von unerwünschten Feinstoffen aus einer wässrigen Faserstoffsuspension
EP2784210A1 (fr) * 2013-03-27 2014-10-01 Seiko Epson Corporation Appareil de fabrication de feuille et procédé de fabrication associé
DE102015118547A1 (de) 2014-10-29 2016-05-04 Entsorgungstechnik Bavaria GmbH Verfahren und Sortieranlage für die Sortierung von Wertstoffen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653477A1 (de) * 1996-12-20 1998-06-25 Siemens Ag Verfahren und Vorrichtung zur Prozeßführung bei der Herstellung von Papier
DE102005002638A1 (de) * 2005-01-20 2006-07-27 Voith Paper Patent Gmbh Aschebestimmung
DE102008019839A1 (de) 2008-04-19 2009-10-22 Voith Patent Gmbh Verfahren zur Entfernung von unerwünschten Feinstoffen aus einer wässrigen Faserstoffsuspension
EP2784210A1 (fr) * 2013-03-27 2014-10-01 Seiko Epson Corporation Appareil de fabrication de feuille et procédé de fabrication associé
DE102015118547A1 (de) 2014-10-29 2016-05-04 Entsorgungstechnik Bavaria GmbH Verfahren und Sortieranlage für die Sortierung von Wertstoffen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023133348A1 (de) 2022-11-30 2024-06-06 Voith Patent Gmbh Vorrichtung und Anordnung und Verfahren zum Umsetzen von Ballen
WO2024115532A1 (fr) 2022-11-30 2024-06-06 Voith Patent Gmbh Dispositif, agencement et procédé de transfert de balles
CN116103947A (zh) * 2023-01-18 2023-05-12 安德里茨（中国）有限公司 浆包供给设备
CN116103947B (zh) * 2023-01-18 2024-06-04 安德里茨（中国）有限公司 浆包供给设备

Also Published As

Publication number Publication date
DE102021103233A1 (de) 2022-08-11
EP4291710A1 (fr) 2023-12-20

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