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WO2007122289A1 - Procédé et dispositif de mesure pour mesurer une pâte de fibres recyclées - Google Patents

Procédé et dispositif de mesure pour mesurer une pâte de fibres recyclées Download PDF

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Publication number
WO2007122289A1
WO2007122289A1 PCT/FI2007/050206 FI2007050206W WO2007122289A1 WO 2007122289 A1 WO2007122289 A1 WO 2007122289A1 FI 2007050206 W FI2007050206 W FI 2007050206W WO 2007122289 A1 WO2007122289 A1 WO 2007122289A1
Authority
WO
WIPO (PCT)
Prior art keywords
fraction
sample
measuring device
recycled fibre
parameter
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/FI2007/050206
Other languages
English (en)
Inventor
Jouko NIINIMÄKI
Heikki Kumpulainen
Ossi Laitinen
Lauri LÖYTYNOJA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Automation Oy
Original Assignee
Metso Automation Oy
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36293848&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007122289(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Metso Automation Oy filed Critical Metso Automation Oy
Priority to CA002649580A priority Critical patent/CA2649580A1/fr
Priority to EP20070730693 priority patent/EP2010902A1/fr
Priority to JP2009505922A priority patent/JP2009534640A/ja
Priority to US12/295,118 priority patent/US20090301674A1/en
Publication of WO2007122289A1 publication Critical patent/WO2007122289A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • 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
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34—Paper
    • G01N33/343—Paper pulp
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G01N2021/1706—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in solids
    • 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 and a measuring device for measuring recycled fibre pulp in a recycled fibre process.
  • a recycled fibre line is also called an RCF line (Recycled Fiber), and it refers to a production process by means of which raw material for printing paper is produced from wastepaper mainly for newspapers and magazines. The process may also be called de-inking. Pasteboard and paperboard may also be recycled and reused in a corresponding manner.
  • the aim in the pulping, washing, dispersing and rewashing of the recycled fibre pulp process is to detach the fibres of the recycled fibre pulp from each other, to separate substances, such as printing ink, wax, glue, plastic, metallization etc., added to the paper at the different stages from the fibres, and to remove the added substances from the recycled fibre pulp.
  • the processing is complicated by the fact that the quality of recycled paper varies according to from where and how the paper was collected. In addition, wastepaper contains impurities and its moisture content varies.
  • a sample may be taken from the recycled fibre process and subject it to hyper-washing, wherein the aim is particularly to remove ink present as free particles in the sample.
  • Hyper-washed samples taken at the different stages of the recycled fibre process may be compared with the recycled fibre pulp at the different stages of the recycled fibre process, thus enabling the determination of the efficiency of the processing of the recycled fibre and the quality of the recycled fibre pulp.
  • Hyper-washing may be performed as a manual wash by taking a sample into a container of the desired size, on the bottom of which is a wire.
  • a wire usually between 50 to 200 meshes (aperture size about 70 ⁇ m to 300 ⁇ m).
  • the sample on the wire is subjected to water rinsing, whereby the particles smaller than the mesh size of the wire flow out of the container.
  • a plurality of problems is associated with manual washing.
  • containers, wires, numbers of samples, the temperature of the rinsing water and the pressure of the rinsing water are different in different measurements (made in different locations), which results in the measure- merits not being comparable.
  • conceptions of a properly or correctly performed hyper-wash vary depending on the manner of measurement and the performer of the measurement, although the washing time and the amount of water consumed are known to affect the end result.
  • Hyper-washing may also be performed with a device manufactured for this purpose.
  • a wire between 50 and 200 mesh
  • An image-processing program may be used to measure both the loose ink in the filtrate and the ink adhered to the fibres of the washed pulp.
  • the method further comprises taking a sample from the recycled fibre pulp of the recycled fibre process into a fractionating pipe, arranging the particles of the flowing sample in the fractionating pipe in accordance with the particle size, processing the sample as at least two fractions according to the particle size, and measuring at least one parameter of at least one added substance in at least one fraction.
  • Each subprocess 100 to 106 of the recycled fibre process may be controlled with a controller 108, to which measurement results may be fed from different points of the recycled fibre process.
  • the controller 108 may utilize the measurement data concerning the subprocesses when optimising the operation of each subprocess separately or when optimising the cooperation of the different subprocesses in order to achieve an optimally good end product.
  • the purpose of the recycled fibre process is to remove substances that are harmful to the recycled fibre pulp. Often the focus is on removing printing ink.
  • the fraction in which the ink particles of the recycled fibre pulp are affects the removal of ink and is indicative of the operation/success of the deink- ing process.
  • the size order of the free ink particles affects the degree to which free ink can be removed from the recycled fibre process.
  • the separation of fibres and ink can be affected primarily mechanically, including, among others: speed of travel of pulp passing through the dispersing subprocess, i.e. production speed, consistency of pulp in the dispersing subprocess, temperature of pulp in the dispersing subprocess, speed of rotation of rotor, and amount of power fed into rotor.
  • speed of travel of pulp passing through the dispersing subprocess i.e. production speed, consistency of pulp in the dispersing subprocess, temperature of pulp in the dispersing subprocess, speed of rotation of rotor, and amount of power fed into rotor.
  • the amount of power fed into the rotor is typically controlled by controlling the a between the rotor and the stator, through which the pulp has to be conveyed.
  • the flowing sample may be imaged by means of at least one camera 206 and a source 208 of optical radiation.
  • Optical radiation means electromagnetic radiation from ultraviolet (about 50 nm) to infrared (about 200 ⁇ m).
  • the image or images may be transferred from the camera 206 to an image-processing unit 210, wherein the image or images generated may be transferred to a display 212.
  • the image-processing unit 210 comprises a processor, memory and one or more computer programs required for performing image processing.
  • the image or images may be transferred to the display 212 also directly from the camera 206 without processing performed in the image- processing unit 210.
  • Each image may a fixed image or a video image.
  • Each fixed image may present one fraction or an image presenting one fraction may be generated or selected from the group of images.
  • Fractions may be taken from the samples into sample vessels 214 to 220, which may total N, wherein N is a positive integer and N is equal to or more than 2.
  • Each fraction in a sample vessel 214 to 220 may be measured in a laboratory or the fractions may be measured as a sample flowing in the fractionating pipe 204 by using one or more optical measuring methods.
  • Optical measurements of the characteristics of fibres may be performed by spectroscopy or by means of image analysis, and the measurements may be directed to a flowing sample or cakes made from sample fractions.
  • the optical measurements may be measurements of absorption, reflectivity or scattering, wherein the polarization of optical radiation may be utilized.
  • Measurement of the total ink in the pulp may be performed by using measurement of optical radiation, which is the ERIC (Effective Residual Ink Concentration) method, for example.
  • optical radiation on the desired band is directed to the pulp or cake, and reflected radiation is measured.
  • Optical radiation may be infrared radiation, whose band may be selected such that the absorption coefficient of the ink in the pulp on the band used is higher than that of the fibres or other particles in the pulp.
  • the band of infrared radiation may be between 700 nm and 1 ,500 nm, however, not being restricted thereto.
  • FIG. 3 shows the general principle of optical measuring methods.
  • Recycled fibre pulp 300 is directed to a transparent pipe 302 at the wavelength used in the optical measurement.
  • the recycled fibre pulp proceeds in the pipe 302, the recycled fibre pulp is illuminated with optical radia- tion generated by a source 304 of optical power.
  • the optical power source 302 may be a led, a incandescent lamp, a gas discharge lamp, a laser or the like, and the optical power source may illuminate the target in a pulse-like manner or continuously.
  • a spectrometer may be used as the sensor 206 for determining the spectrum of the optical radiation reflected by each fraction. From the spectrum, the colour, brightness of the particles etc. and thus, the desired parameter to be measured, may be determined.
  • the source 304 may direct a suitable energy to each fraction for achieving an acoustic response signal in the particles of the sample.
  • the source 304 may be for instance a laser whose optical radiation causes acoustic oscillation of the particles.
  • the sensor 206 may detect acoustic oscillation.
  • acoustic oscillation is ultrasound.
  • the frequency, amplitude and/or phase of acoustic radiation depend on the characteristics of the particles, i.e. the parameter to be measured.
  • the measurement result 404 of the sample taken from the washing subprocess 102 (or 106) of the recycled fibre process may be compared with the reference, which is according to the distribution 400 in fractions FR1 to FR3 and has a constant value of 0 in fraction FR4.
  • the comparison may be performed by means of correlation, for example. If the difference between the reference and the measurement result 404 is larger than a predetermined threshold value, the recycled fibre process does not operate adequately well, and the quality of the end product does not fulfil the desired quality requirements. In this case, the operation of the recycled fibre process has to be enhanced. If the difference is smaller than the threshold value, the operation of the recycled fibre process can be considered optimized and the quality of the end product sufficiently good.
  • the sample may be processed as at least two fractions by imaging the different particle sizes of the sample flowing in the fractionating pipe 204 with the camera 206, and generating at least one image representing at least one fraction with the image-processing unit 210 from the images generated by the camera 206.
  • at least two fractions may be generated from the sample flowing in the fractionating pipe 204 into the containers 214 to 220 and image at least one fraction in one of the containers 214 to 220 with the camera 206.
  • a cake 222 may be generated from at least one fraction and image the at least one cake generated from the fraction with the camera 206.
  • the parameter to be measured may represent the portion in the sample of at least one added substance attached to the fibres.
  • the parameter to be measured may also represent the portion in the sample of at least one added substance detached from the fibres.
  • both above- mentioned parameters may be measured.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de mesure comprenant un système de prise de vue (206) et une unité de traitement d'image (210), ainsi qu'une conduite de fractionnement (204) qui reçoit un échantillon de pâte de fibres recyclées résultant d'un processus de recyclage de fibres, et ordonne les particules de l'échantillon en écoulement, en fonction des dimensions de ces particules. Le dispositif de mesure traite l'échantillon sous la forme d'au moins deux fractions, en fonction des dimensions des particules. Le système de prise de vue (206) crée une image d'au moins une fraction. L'unité de traitement d'image (210) reçoit les images formées par le système de prise de vue (206), et mesure au moins un paramètre d'au moins une substance ajoutée, dans au moins une fraction, au moyen de l'image créée.
PCT/FI2007/050206 2006-04-21 2007-04-19 Procédé et dispositif de mesure pour mesurer une pâte de fibres recyclées Ceased WO2007122289A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002649580A CA2649580A1 (fr) 2006-04-21 2007-04-19 Procede et dispositif de mesure pour mesurer une pate de fibres recyclees
EP20070730693 EP2010902A1 (fr) 2006-04-21 2007-04-19 Procédé et dispositif de mesure pour mesurer une pâte de fibres recyclées
JP2009505922A JP2009534640A (ja) 2006-04-21 2007-04-19 再生ファイバーパルプを測定するための方法及びその測定装置
US12/295,118 US20090301674A1 (en) 2006-04-21 2007-04-19 Method and measuring device for measuring recycled fibre pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20065254 2006-04-21
FI20065254A FI122242B (fi) 2006-04-21 2006-04-21 Menetelmä ja mittalaite mitata kierrätyskuitumassaa

Publications (1)

Publication Number Publication Date
WO2007122289A1 true WO2007122289A1 (fr) 2007-11-01

Family

ID=36293848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2007/050206 Ceased WO2007122289A1 (fr) 2006-04-21 2007-04-19 Procédé et dispositif de mesure pour mesurer une pâte de fibres recyclées

Country Status (6)

Country Link
US (1) US20090301674A1 (fr)
EP (1) EP2010902A1 (fr)
JP (1) JP2009534640A (fr)
CA (1) CA2649580A1 (fr)
FI (1) FI122242B (fr)
WO (1) WO2007122289A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116030A1 (fr) * 2009-04-07 2010-10-14 Metso Automation Oy Modélisation d'une propriété de papier ou de carton
WO2011072396A1 (fr) 2009-12-18 2011-06-23 Fpinnovations Analyseur de macropolluants en ligne et procédé
WO2012028788A1 (fr) * 2010-08-31 2012-03-08 Upm-Kymmene Corporation Procédé et système pour la fabrication de pigment organique ainsi que le pigment organique
WO2013175077A1 (fr) * 2012-05-25 2013-11-28 Kemira Oyj Procédé et système d'analyse de liquides à teneur en matière solide et de surveillance ou de commande de processus contenant de tels liquides
WO2015075319A1 (fr) 2013-11-24 2015-05-28 Kemira Oyj Procédé et système d'analyse d'échantillon liquide contenant des particules de matière solide et utilisation de tels procédé et système
SE543483C2 (en) * 2016-12-05 2021-03-02 Valmet Automation Oy Apparatus and method for measuring suspension and controlling process of suspension
WO2021144502A1 (fr) * 2020-01-14 2021-07-22 Valmet Automation Oy Appareil et procédé de mesure de suspension s'écoulant dans un tube de fractionnement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6458530B2 (ja) * 2015-02-16 2019-01-30 セイコーエプソン株式会社 シート製造装置、シート製造方法、古紙処理装置
US10041209B1 (en) 2015-08-21 2018-08-07 Pulmac Systems International, Inc. System for engineering fibers to improve paper production
US10941520B2 (en) 2015-08-21 2021-03-09 Pulmac Systems International, Inc. Fractionating and refining system for engineering fibers to improve paper production
US11214925B2 (en) 2015-08-21 2022-01-04 Pulmac Systems International, Inc. Method of preparing recycled cellulosic fibers to improve paper production
CN110940277A (zh) * 2018-09-21 2020-03-31 湖南中烟工业有限责任公司 一种用于连续测量烟草材料尺寸的装置及方法

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WO1986005525A1 (fr) * 1985-03-05 1986-09-25 Carr Wayne F Procede et appareil de detection de contaminants dans de la pate a papier
DE4040463A1 (de) * 1990-12-18 1992-06-25 Basf Ag Messverfahren zur bestimmung von harzteilchen in papierstoffen
WO1995008019A1 (fr) * 1993-09-16 1995-03-23 Siemens Aktiengesellschaft Dispositif d'exploitation d'une installation de production de pate de cellulose desencree avec des analyseurs de l'etat de la suspension de vieux papiers constitues de reseaux neuraux
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US6589389B2 (en) * 2001-09-26 2003-07-08 Voith Paper, Inc. Test method for determining bleed-throughs in old corrugated container fiber pulp

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DE4040463A1 (de) * 1990-12-18 1992-06-25 Basf Ag Messverfahren zur bestimmung von harzteilchen in papierstoffen
WO1995008019A1 (fr) * 1993-09-16 1995-03-23 Siemens Aktiengesellschaft Dispositif d'exploitation d'une installation de production de pate de cellulose desencree avec des analyseurs de l'etat de la suspension de vieux papiers constitues de reseaux neuraux
EP0813063A1 (fr) * 1996-06-10 1997-12-17 Centre Technique De L'industrie Des Papiers Cartons Et Celluloses . Procédé de régulation d'une chaîne de désencrage de pâte à papier et dispositif pour mesurer en continu la quantité de particules contenues dans un liquide

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102449562A (zh) * 2009-04-07 2012-05-09 美卓自动化有限公司 纸张、纸板或板纸的性质的建模
JP2012522910A (ja) * 2009-04-07 2012-09-27 メッツォ オートメーション オイ 紙、板紙又は板の特性のモデル化
WO2010116030A1 (fr) * 2009-04-07 2010-10-14 Metso Automation Oy Modélisation d'une propriété de papier ou de carton
EP2417497A4 (fr) * 2009-04-07 2014-03-12 Metso Automation Oy Modélisation d'une propriété de papier ou de carton
US8877010B2 (en) 2009-04-07 2014-11-04 Metso Automation Oy Modelling of a property of paper, paperboard or board
CN102449562B (zh) * 2009-04-07 2015-09-30 维美德自动化有限公司 纸张、纸板或板纸的性质的建模
US9280726B2 (en) 2009-12-18 2016-03-08 Fpinnovation On-line macrocontaminant analyser and method
WO2011072396A1 (fr) 2009-12-18 2011-06-23 Fpinnovations Analyseur de macropolluants en ligne et procédé
EP2513635A4 (fr) * 2009-12-18 2017-06-28 FPInnovations Analyseur de macropolluants en ligne et procédé
WO2012028788A1 (fr) * 2010-08-31 2012-03-08 Upm-Kymmene Corporation Procédé et système pour la fabrication de pigment organique ainsi que le pigment organique
US10139330B2 (en) 2012-05-25 2018-11-27 Kemira Oyj Method and system for analyzing solid matter containing liquids and monitoring or controlling processes containing such liquids
WO2013175077A1 (fr) * 2012-05-25 2013-11-28 Kemira Oyj Procédé et système d'analyse de liquides à teneur en matière solide et de surveillance ou de commande de processus contenant de tels liquides
WO2015075319A1 (fr) 2013-11-24 2015-05-28 Kemira Oyj Procédé et système d'analyse d'échantillon liquide contenant des particules de matière solide et utilisation de tels procédé et système
SE543483C2 (en) * 2016-12-05 2021-03-02 Valmet Automation Oy Apparatus and method for measuring suspension and controlling process of suspension
WO2021144502A1 (fr) * 2020-01-14 2021-07-22 Valmet Automation Oy Appareil et procédé de mesure de suspension s'écoulant dans un tube de fractionnement
US12325957B2 (en) 2020-01-14 2025-06-10 Valmet Automation Oy Apparatus for and method of measuring suspension flowing in tube fractionator

Also Published As

Publication number Publication date
FI122242B (fi) 2011-10-31
EP2010902A1 (fr) 2009-01-07
FI20065254A0 (fi) 2006-04-21
CA2649580A1 (fr) 2007-11-01
JP2009534640A (ja) 2009-09-24
US20090301674A1 (en) 2009-12-10
FI20065254L (fi) 2008-01-16

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