DE102008064271A1 - Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation - Google Patents
Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation Download PDFInfo
- Publication number
- DE102008064271A1 DE102008064271A1 DE200810064271 DE102008064271A DE102008064271A1 DE 102008064271 A1 DE102008064271 A1 DE 102008064271A1 DE 200810064271 DE200810064271 DE 200810064271 DE 102008064271 A DE102008064271 A DE 102008064271A DE 102008064271 A1 DE102008064271 A1 DE 102008064271A1
- Authority
- DE
- Germany
- Prior art keywords
- flotation
- mixing device
- fiber suspension
- gas
- suspension
- 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.)
- Withdrawn
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
Landscapes
- 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
Das Verfahren dient zur Entfernung von Feststoffen mit Hilfe von Gasblasen (4) aus einer wässrigen Faserstoffsuspension (S), insbesondere Altpapiersusns einer Mischvorrichtung (1) Gas (6) zugeführt und Gasblasen gebildet werden. Danach wird die begaste Suspension (S') aus der Mischvorrichtung (1) über einen einstellbaren Strömungswiderstand, insbesondere durch eine Drossel (4), in einen Flotationsbehälter (3) geführt, indem die Abscheidung von Feststoffen durch Flotation erfolgt. Das Verfahren ermöglicht die Einstellung des Luftgehaltes der begasten Suspension (S').The method is used for the removal of solids by means of gas bubbles (4) from an aqueous pulp suspension (S), in particular waste paper of a mixing device (1) supplied gas (6) and gas bubbles are formed. Thereafter, the fumigated suspension (S ') from the mixing device (1) via an adjustable flow resistance, in particular by a throttle (4), in a flotation tank (3) performed by the deposition of solids by flotation. The method allows the adjustment of the air content of the fumigated suspension (S ').
Description
Die Erfindung betrifft ein Verfahren zur Entfernung von Feststoffen gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a process for the removal of solids according to the preamble of claim 1.
Durch Flotation wird ein auszuscheidende Stoffe enthaltender Schaum oder Schwimmschlamm gebildet. Ein typischer Anwendungsfall für solche Verfahren ist die Aufbereitung von einer aus bedrucktem Altpapier gewonnenen Suspension, in der die Druckfarbenpartikel bereits von Fasern abgelöst sind, so dass sie sich ausflotieren lassen. Der hier beschriebene Flotationsvorgang nutzt die Unterschiede zwischen Papierfaserstoff und auszuscheidenden Feststoffen, insbesondere von unerwünschten Störstoffteilchen in der Art, dass der Faserstoff auf Grund seines eher hydrophilen Charakters in der Fasersuspension verbleibt, während die angesprochenen Störstoffteilchen hydrophob sind und deshalb zusammen mit den Luftblasen in den Schaum gelangen. Dabei werden also nicht alle Feststoffe ausflotiert, sondern Fasern von Verunreinigungen getrennt. Der oft benutzte Begriff „Flotationsdeinking” wird in der Regel nicht nur für die Entfernung von Druckfarbenpartikeln (ink = Druckfarbe), sondern auch allgemeiner für die Flotation von feinen Verunreinigungen aus Faserstoffsuspensionen verwendet. Solche Stoffe sind insbesondere Kleber, feine Kunststoffpartikel und eventuell auch Harze.By Flotation is a foam containing ausschecheidende substances or Formed scum. A typical use case for such methods is the processing of a printed paper obtained suspension in which the ink particles already from Fibers are detached so that they can float out. The flotation process described here exploits the differences between Paper pulp and solids to be discharged, in particular unwanted contaminant particles in the way that the pulp due to its rather hydrophilic character remains in the fiber suspension while the mentioned Störstoffteilchen are hydrophobic and therefore together with get the bubbles into the foam. Not all of them will be Solids floated, but fibers separated from impurities. Of the often used term "flotation deinking" usually not just for the removal of ink particles (ink = ink), but also more generally for flotation used by fine impurities from pulp suspensions. Such substances are in particular glue, fine plastic particles and possibly also resins.
Die
Anlagen, die zur Durchführung solcher Verfahren verwendet werden, müssen für einen stabilen Dauerbetrieb geeignet sein. Das erfordert zumeist einen hohen regelungstechnischen Aufwand, da eine Veilzahl von Prozessparametern optimal aufeinander abzustimmen ist. So sollte auch der Gasgehalt der begasten Fasersuspension an die Anforderungen und Bedingungen angepasst sein.Attachments, which are used to carry out such processes, must be suitable for stable continuous operation be. This usually requires a high control engineering effort, because a number of process parameters optimally match is. So should the gas content of the fumigated fiber suspension be adapted to the requirements and conditions.
Bei
einem Flotationsverfahren gemäß
Aus
der
Der Erfindung liegt die Aufgabe zu Grunde, Wirtschaftlichkeit und Effektivität des Verfahrens weiter zu verbessern. Insbesondere soll es möglich werden, den Gas- oder Luftgehalt der Fasersuspension während des ganzen Betriebes auf einen optimalen Wert einzustellen.Of the Invention is the object of the economy and efficiency of the process on. In particular, it should be possible be the gas or air content of the fiber suspension during of the whole enterprise to an optimal value.
Diese Aufgabe wird durch die im Anspruch 1 genannten Merkmale gelöst.These The object is achieved by the features mentioned in claim 1.
Die Unteransprüche 25 und 26 beschreiben vorteilhafte Vorrichtungen zur Durchführung des Verfahrens.The Subclaims 25 and 26 describe advantageous devices to carry out the process.
Durch Änderung des Strömungswiderstandes ändert sich in der zu begasenden Fasersuspension der Druck und damit – auch bei unverändertem Suspensions-Mengenstrom – die Menge des angesaugten Gases. Infolgedessen kann der erfindungsgemäß vorgesehene Regeleingriff zur Veränderung der Gasbeladung so erfolgen, dass der der Mischvorrichtung zugeführte volumetrische Suspensions-Mengenstrom davon unabhängig einstellbar ist. Das führt zu einem zusätzlichen Freiheitsgrad, der für die Prozessführung und – regelung ein großer Vorteil ist.By change the flow resistance changes in the too fumigating fiber suspension the pressure and thus - even at unchanged suspension flow rate - the amount the sucked gas. As a result, the inventively provided Control intervention to change the gas loading done so that of the mixing device supplied volumetric Suspension flow rate of which is independently adjustable. The leads to an additional degree of freedom, the for process control and regulation a big advantage.
Der Regeleingriff erfolgt mit besonderem Vorteil an einem Teil der Mischvorrichtung, an dem eine Druckveränderung unproblematisch vorgenommen werden kann, insbesondere keine Verschmutzungsprobleme zu befürchten sind. Eine direkte Drosselung des Luftstromes, die zumindest bei Verwendung von aus dem Flotationsschaum stammender Luft wegen Feuchtigkeit und Restschaum problematisch wäre, wird nicht vorgenommen. Mit Hilfe des erfindungsgemäßen Verfahrens ist es also möglich, die Versorgung der Fasersuspension mit Gas einfach und zuverlässig zu regeln.Of the Regeleingriff takes place with particular advantage to a part of the mixing device, at which a pressure change made unproblematic In particular, no fouling problems are to be feared are. A direct throttling of the air flow, at least at Use of air from flotation foam due to moisture and residual foam would be problematic, is not made. With the aid of the method according to the invention it is thus possible to supply the fiber suspension with Gas simple and reliable to regulate.
Die Erfindung und ihre Vorteile werden erläutert an Hand von Zeichnungen. Dabei zeigen:The The invention and its advantages are explained with reference to Drawings. Showing:
In
Die
Mischvorrichtung
Der
die ausflotierten Feststoffe, insbesondere unerwünschte
Störstoffe enthaltende Flotationsschaum
In
Der
Abstand
Eine
andere Möglichkeit besteht darin, im Strömungsquerschnitt
eine Drossel
Der
Strömungswiderstand lässt sich auch bereits stromaufwärts
des Umlenkdiffusors
Gemäß
Da
im Algemeinen die zu flotierende Fasersuspension in mehrere Ströme
aufgeteilt und diese dann begast werden, ergeben sich Möglichkeiten mehre
Ströme in ein und derselben Mischvorrichtung mit Gasblasen
zu vermischen. So können mehrere nebeneinander liegende
parallel geführte Suspensionsströme in einer Mischvorrichtung
Die
Vermischung der Suspension mit Gasblasen und das Anlagern der Feststoffe
an die Gasblasen in der Mischvorrichtung
Bei
Flotationsanlagen, die zur Durchführung des erfindungsgemäßen
Verfahrens eingesetzt werden, durchströmt die Fasersuspension zumeist
mehrere zu einer Flotationsstufe gehörende Flotationsbehälter
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 3120202 A1 [0003] DE 3120202 A1 [0003]
- - DE 10236123 A1 [0005] - DE 10236123 A1 [0005]
- - DE 102008016264 A1 [0006] - DE 102008016264 A1 [0006]
Claims (26)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810064271 DE102008064271A1 (en) | 2008-12-20 | 2008-12-20 | Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation |
PCT/EP2009/064662 WO2010069670A2 (en) | 2008-12-20 | 2009-11-05 | Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same |
CN2009801513929A CN102257211A (en) | 2008-12-20 | 2009-11-05 | Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same |
EP09748115A EP2379797A2 (en) | 2008-12-20 | 2009-11-05 | Method for removing solids from a fibre suspension by flotation and flotation device for carrying out the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810064271 DE102008064271A1 (en) | 2008-12-20 | 2008-12-20 | Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008064271A1 true DE102008064271A1 (en) | 2010-07-01 |
Family
ID=42214832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810064271 Withdrawn DE102008064271A1 (en) | 2008-12-20 | 2008-12-20 | Process for the removal of solids from a fiber suspension by flotation and flotation for its implementation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2379797A2 (en) |
CN (1) | CN102257211A (en) |
DE (1) | DE102008064271A1 (en) |
WO (1) | WO2010069670A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016026477A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Method and device for cleaning fiber suspensions by means of flotation |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112013015836A2 (en) * | 2010-12-21 | 2017-06-27 | Volvo Lastvagnar Ab | a tank arrangement and method for operating a vehicle tank arrangement. |
DE102012210264A1 (en) * | 2012-06-19 | 2013-12-19 | Voith Patent Gmbh | Flotationsregelung |
CN107344144B (en) * | 2017-09-07 | 2023-09-01 | 北矿机电科技有限责任公司 | Air suction device of self-suction air flotation machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3120202A1 (en) | 1981-05-21 | 1982-12-09 | J.M. Voith Gmbh, 7920 Heidenheim | Device for the deinking of waste paper by flotation |
AT410405B (en) * | 2001-09-17 | 2003-04-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR SEPARATING INTERFERENTS FROM SUSPENSIONS BY FLOTATION |
DE10236123A1 (en) | 2002-08-07 | 2004-02-26 | Voith Paper Patent Gmbh | Process for removing impurities from an aqueous paper fiber suspension |
DE102008016264A1 (en) | 2007-04-05 | 2008-10-09 | Metso Paper, Inc. | Fiber suspension flow supplying method for removing printing ink or impurity, involves sucking amounts of air in flows such that load of mixture of air and fiber mass is different at points, where mixture leaks out/exhausts from diffuser |
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 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1236432B (en) * | 1963-07-03 | 1967-03-16 | Beteiligungs & Patentverw Gmbh | Flotation cell |
DE3008476A1 (en) * | 1980-03-05 | 1981-09-17 | Bayer Ag, 5090 Leverkusen | METHOD FOR FLOTATION AND USE OF FUNNEL NOZZLES FOR FLOTATION |
DE3144386C2 (en) * | 1981-11-07 | 1983-12-29 | J.M. Voith Gmbh, 7920 Heidenheim | Injector flotation apparatus |
US5023021A (en) * | 1990-03-07 | 1991-06-11 | Conrad Richard H | Cartridge venturi |
DE19615089C1 (en) * | 1996-04-17 | 1997-04-10 | Voith Sulzer Stoffaufbereitung | Paper suspension flotation useful esp. for solid impurity sepn. |
DE19831530C1 (en) * | 1998-07-14 | 2000-03-30 | Voith Sulzer Papiertech Patent | Flotation for cleaning fiber suspensions of used paper for recycling uses additional and larger gas bubbles to carry up the foreign matter with the air bubbles into a floating foam for removal |
DE19950600C2 (en) * | 1999-10-21 | 2003-09-18 | K & S Kali Gmbh | Device for gassing a flotation slurry in a pneumatic flotation cell |
AT411155B (en) * | 2002-03-27 | 2003-10-27 | Andritz Ag Maschf | DEVICE FOR SEPARATING SOLIDS FROM LIQUIDS BY FLOTATION |
FI122973B (en) * | 2005-06-17 | 2012-09-28 | Metso Paper Inc | Injector for flotation cell, nozzle part in injector for flotation cell, flotation cell and method for mixing fiber suspension strip and air with each other in injector for flotation cell |
-
2008
- 2008-12-20 DE DE200810064271 patent/DE102008064271A1/en not_active Withdrawn
-
2009
- 2009-11-05 CN CN2009801513929A patent/CN102257211A/en active Pending
- 2009-11-05 EP EP09748115A patent/EP2379797A2/en not_active Withdrawn
- 2009-11-05 WO PCT/EP2009/064662 patent/WO2010069670A2/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3120202A1 (en) | 1981-05-21 | 1982-12-09 | J.M. Voith Gmbh, 7920 Heidenheim | Device for the deinking of waste paper by flotation |
AT410405B (en) * | 2001-09-17 | 2003-04-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR SEPARATING INTERFERENTS FROM SUSPENSIONS BY FLOTATION |
DE10236123A1 (en) | 2002-08-07 | 2004-02-26 | Voith Paper Patent Gmbh | Process for removing impurities from an aqueous paper fiber suspension |
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 |
DE102008016264A1 (en) | 2007-04-05 | 2008-10-09 | Metso Paper, Inc. | Fiber suspension flow supplying method for removing printing ink or impurity, involves sucking amounts of air in flows such that load of mixture of air and fiber mass is different at points, where mixture leaks out/exhausts from diffuser |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016026477A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Method and device for cleaning fiber suspensions by means of flotation |
DE102014012666A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Process and apparatus for cleaning contaminated solid-liquid mixtures |
US10799885B2 (en) | 2014-08-22 | 2020-10-13 | Rithco Papertec Gmbh | Method and device for cleaning fiber suspensions by means of flotation |
Also Published As
Publication number | Publication date |
---|---|
EP2379797A2 (en) | 2011-10-26 |
WO2010069670A3 (en) | 2010-08-12 |
WO2010069670A2 (en) | 2010-06-24 |
CN102257211A (en) | 2011-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20140701 |