WO2010069670A2 - Procédé permettant de retirer des matières solides d'une suspension de fibres par flottation et dispositif de flottation permettant la mise en oeuvre dudit procédé - Google Patents

Procédé permettant de retirer des matières solides d'une suspension de fibres par flottation et dispositif de flottation permettant la mise en oeuvre dudit procédé Download PDF

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Publication number
WO2010069670A2
WO2010069670A2 PCT/EP2009/064662 EP2009064662W WO2010069670A2 WO 2010069670 A2 WO2010069670 A2 WO 2010069670A2 EP 2009064662 W EP2009064662 W EP 2009064662W WO 2010069670 A2 WO2010069670 A2 WO 2010069670A2
Authority
WO
WIPO (PCT)
Prior art keywords
mixing device
flotation
fiber suspension
suspension
gas
Prior art date
Application number
PCT/EP2009/064662
Other languages
German (de)
English (en)
Other versions
WO2010069670A3 (fr
Inventor
Axel Dreyer
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 CN2009801513929A priority Critical patent/CN102257211A/zh
Priority to EP09748115A priority patent/EP2379797A2/fr
Publication of WO2010069670A2 publication Critical patent/WO2010069670A2/fr
Publication of WO2010069670A3 publication Critical patent/WO2010069670A3/fr

Links

Classifications

    • 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
    • D21B1/325—Defibrating by other means of waste paper de-inking devices
    • D21B1/327—Defibrating by other means of waste paper de-inking devices using flotation devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/028—Control and monitoring of flotation processes; computer models therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1456—Feed mechanisms for the slurry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/24—Pneumatic
    • B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
    • 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
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/70—Pulp catching, de-watering, or recovering; Re-use of pulp-water by flotation
    • 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 process for the removal of solids according to the preamble of claim 1.
  • DE 31 20 202 A1 describes an injector apparatus in which a suction of air from the interior of the flotation cell takes place and the formation of air bubbles required for flotation.
  • the air supply for a part of the flotation cells, in particular for the last flotation cell is adjusted by varying the hydraulic throughput through the mixing devices supplying each of these cells.
  • the invention is based on the object of further improving the economic efficiency and the effectiveness of the process.
  • the control intervention provided according to the invention for changing the gas charge can be carried out so that the volumetric suspension flow rate supplied to the mixing device can be set independently thereof. This leads to an additional degree of freedom, which is a great advantage for the process control and regulation.
  • the control intervention is carried out with particular advantage on a part of the mixing device to which a pressure change can be made without problems, in particular no fouling problems are to be feared.
  • FIG. 1 shows a flotation cell for carrying out the method according to the invention
  • Fig. 2-6 respectively special technical possibilities for influencing the flow resistance
  • Fig. 7 is a part of a plurality of free-jet forming
  • Fig. 1 the section through a flotation tank 3 is shown with an oval cross section, a shape that has proven to be particularly favorable.
  • the fiber suspension S is pumped into the mixing device 1 under a pressure which is higher than that of the environment.
  • the mixing device 1 is arranged exmittig in the flotation tank 3. It can be designed so that it is formed and gassed in a plurality of suspension streams, which is not shown here for simplicity.
  • At least one free jet 7 is formed from the stream of the fiber suspension S after it has entered the mixing device 1, so that the gas 6 is sucked in by injection action and mixes with the fiber suspension S.
  • the gas 6 can be taken directly from the flotation tank 3 above the flotation foam 2.
  • the fumigated suspension S ' is then continued in a flow channel 8 arranged in the mixing device 1, preferably with a round cross-section.
  • most technical versions are the - A -
  • the mixing device 1 ends here downstream in a deflection diffuser 10, in which a deflection of the fumigated suspension by about 90 degrees in the horizontal and a distribution over the entire circumference (360 degrees) takes place.
  • the deflecting diffuser 10 comprises a deflecting part 15, which cooperates with a cover disk 12 (see also, for example, FIG. 2).
  • a variable throttle 4 mounted in the deflection diffuser 10 is indicated schematically. On important embodiments of this throttle 4 will be discussed in more detail. The adjustment of this throttle 4 and thus the flow resistance is carried out by a control part 9 via a control line 14 connected to the throttle 4.
  • the control range of the throttle is advantageously at least 10%, better 20% of the area of the flow cross-section at the throttle point.
  • the adjustment of the flow resistance can be made with a controller, the measurement signals from the flotation, z. B. the amount of effluent flotation foam 2 processed. It is also an adjustment to
  • the flotation foam 2 containing the flotated solids, in particular undesirable impurities, is collected in a foam channel 11 and disposed of as a reject R, further processed or fed to the flotation tank of a further flotation stage (not shown).
  • the cleaned by flotation fiber suspension, so the accepts is discharged here from the lower part of the flotation tank 3 as accept A.
  • the deflecting diffuser 10 is provided with a cover plate 12 ' , which is located at an adjustable distance 13 to the outlet end of the deflection member 15.
  • the lens 12 ' does not have to be like here, it may also have a shape that approximates or corresponds to the shape of the deflection member 15.
  • the actuators 16 used for this purpose can, for. B. hydraulically, pneumatically or electrically driven.
  • the distance 13 of the lens 12 ' can also directly by mechanical components such as linkages, ropes, spindles or
  • FIG. 3 shows an adjusting unit 20, which is mounted below the flotation tank 3 and actuates at least one lifting element 21 passing through its wall, whereby the distance 13 to the - fixed - deflection part 15 can be changed.
  • a throttle 4 with adjustable volume in the flow cross-section, which is indicated in Fig. 4 using the example of a centrally mounted on the cover plate 12 deformable, in particular elastic hollow body 17.
  • the flow resistance can also already be adjusted upstream of the deflecting diffuser 10, as FIG. 5 shows.
  • a deformable, in particular elastic, hollow body 19 is inserted which extends over the entire circumference of the inner wall of the mixing device.
  • pivotable lamellae 22 are mounted between the flow channels 8 and the deflecting part 12 and can be made to act more or less strongly against the flow by at least one actuating device 23.
  • actuating device 23 As you know, there are many more possibilities of adjustable throttles. Even with their help, the inventive method can be realized.
  • the fiber suspension to be recorded is divided into several streams and these are then gassed, it is possible to mix several streams in one and the same mixing device with gas bubbles.
  • a plurality of juxtaposed parallel guided suspension streams can be formed in a mixing device 1, as shown in Fig. 7.
  • the feeding direction of the fiber suspension S is initially transverse to the flow direction, which have the free jets 7 during fumigation.
  • Solids to the gas bubbles in the mixing device 1 can be further improved by measures in the flow channel 8 following the fumigation.
  • measures in the flow channel 8 following the fumigation Two variants for generating turbulences in the flow channels 8 are shown by way of example in FIG. 7: These are used for sudden extensions 25 or gradual
  • Extensions 26 of the flow cross-section which leads to localized vertebrae. These deliver, in particular, the energy required to comminute gas bubbles that are too large and / or the energy needed to deposit the solids in the gas bubbles.
  • the fiber suspension flows through usually several belonging to a flotation flotation tank 3 successively until the required degree of whiteness is reached. Since the flotation foam, which is formed in a single flotation, in most cases still contains a considerable proportion of paper fibers, processes of this kind are often carried out with several flotation stages, with the overflow, so the flotation foam, the upstream stage as an inlet to the next Stage is performed. Usually one then speaks of a first and second flotation or even of primary and secondary flotation. The passage of the second flotation can the inlet of the first

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

Abstract

La présente invention concerne un procédé permettant de retirer des matières solides d'une suspension aqueuse de matière fibreuse (S), notamment d'une suspension de vieux papiers, à l'aide de bulles de gaz (4). Du gaz est ajouté à la suspension de matière fibreuse (S) dans au moins un dispositif de mélange (1) et des bulles de gaz sont formées. La suspension gazéifiée (S') est ensuite transférée du dispositif de mélange (1) dans un récipient de flottation (3) au moyen d'une résistance à l'écoulement fluidique réglable, notamment par le biais d'un étranglement (4), puis des matières solides se déposent par flottation. Le procédé selon l'invention permet de réguler la teneur en air de la suspension gazéifiée (S').
PCT/EP2009/064662 2008-12-20 2009-11-05 Procédé permettant de retirer des matières solides d'une suspension de fibres par flottation et dispositif de flottation permettant la mise en oeuvre dudit procédé WO2010069670A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009801513929A CN102257211A (zh) 2008-12-20 2009-11-05 通过浮选从纤维悬浊液去除固体的方法以及有关浮选装置
EP09748115A EP2379797A2 (fr) 2008-12-20 2009-11-05 Procédé permettant de retirer des matières solides d'une suspension de fibres par flottation et dispositif de flottation permettant la mise en oeuvre dudit procédé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008064271.1 2008-12-20
DE200810064271 DE102008064271A1 (de) 2008-12-20 2008-12-20 Verfahren zur Entfernung von Feststoffen aus einer Fasersuspension durch Flotation sowie Flotationsvorrichtung zu seiner Durchführung

Publications (2)

Publication Number Publication Date
WO2010069670A2 true WO2010069670A2 (fr) 2010-06-24
WO2010069670A3 WO2010069670A3 (fr) 2010-08-12

Family

ID=42214832

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/064662 WO2010069670A2 (fr) 2008-12-20 2009-11-05 Procédé permettant de retirer des matières solides d'une suspension de fibres par flottation et dispositif de flottation permettant la mise en oeuvre dudit procédé

Country Status (4)

Country Link
EP (1) EP2379797A2 (fr)
CN (1) CN102257211A (fr)
DE (1) DE102008064271A1 (fr)
WO (1) WO2010069670A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103269892A (zh) * 2010-12-21 2013-08-28 沃尔沃拉斯特瓦格纳公司 油箱设备和用于操作车辆油箱设备的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210264A1 (de) * 2012-06-19 2013-12-19 Voith Patent Gmbh Flotationsregelung
DE102014012666B4 (de) 2014-08-22 2016-07-21 Rithco Papertec Gmbh Vorrichtung und Verfahren zur Reinigung von verunreinigten Feststoff-Flüssigkeits-Gemischen und Verwendung der Vorrichtung und des Verfahrens
CN107344144B (zh) * 2017-09-07 2023-09-01 北矿机电科技有限责任公司 一种自吸气浮选机的吸气装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236432B (de) * 1963-07-03 1967-03-16 Beteiligungs & Patentverw Gmbh Flotationszelle
DE19615089C1 (de) * 1996-04-17 1997-04-10 Voith Sulzer Stoffaufbereitung Flotationsverfahren und Vorrichtung zu seiner Durchführung
DE19950600A1 (de) * 1999-10-21 2001-05-03 Kali & Salz Ag Vorrichtung zum Begasen von Flüssigkeiten und Suspensionen
WO2006134235A1 (fr) * 2005-06-17 2006-12-21 Metso Paper, Inc. Cellule de flottation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008476A1 (de) * 1980-03-05 1981-09-17 Bayer Ag, 5090 Leverkusen Verfahren zur flotation und verwendung von trichterduesen zur flotation
DE3120202C2 (de) 1981-05-21 1986-06-26 J.M. Voith Gmbh, 7920 Heidenheim Einrichtung zum Deinken von Altpapier durch Flotation
DE3144386C2 (de) * 1981-11-07 1983-12-29 J.M. Voith Gmbh, 7920 Heidenheim Injektorflotationsapparat
US5023021A (en) * 1990-03-07 1991-06-11 Conrad Richard H Cartridge venturi
DE19831530C1 (de) * 1998-07-14 2000-03-30 Voith Sulzer Papiertech Patent Verfahren zur Flotation von Störstoffen aus einer wässrigen faserstoffhaltigen Suspension
AT410405B (de) * 2001-09-17 2003-04-25 Andritz Ag Maschf Verfahren und vorrichtung zur abtrennung von störstoffen aus suspensionen durch flotation
AT411155B (de) * 2002-03-27 2003-10-27 Andritz Ag Maschf Vorrichtung zum abtrennen von feststoffen aus flüssigkeiten mittels flotation
DE10236123B4 (de) 2002-08-07 2006-12-07 Voith Patent Gmbh Verfahren zur Entfernung von Störstoffen aus einer wässrigen Papierfasersuspension
US20080308502A1 (en) * 2005-02-01 2008-12-18 The UIniversity of Newcastle Researcdh Associates Limited Method and Apparatus for Contacting Bubbles and Particles in a Flotation Separation System
FI119998B (fi) 2007-04-05 2009-05-29 Metso Paper Inc Kuitususpensiovirtauksen syöttäminen flotaatiokennoon ja flotaatiokennon injektori

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236432B (de) * 1963-07-03 1967-03-16 Beteiligungs & Patentverw Gmbh Flotationszelle
DE19615089C1 (de) * 1996-04-17 1997-04-10 Voith Sulzer Stoffaufbereitung Flotationsverfahren und Vorrichtung zu seiner Durchführung
DE19950600A1 (de) * 1999-10-21 2001-05-03 Kali & Salz Ag Vorrichtung zum Begasen von Flüssigkeiten und Suspensionen
WO2006134235A1 (fr) * 2005-06-17 2006-12-21 Metso Paper, Inc. Cellule de flottation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103269892A (zh) * 2010-12-21 2013-08-28 沃尔沃拉斯特瓦格纳公司 油箱设备和用于操作车辆油箱设备的方法

Also Published As

Publication number Publication date
EP2379797A2 (fr) 2011-10-26
WO2010069670A3 (fr) 2010-08-12
CN102257211A (zh) 2011-11-23
DE102008064271A1 (de) 2010-07-01

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