DE102008056040A1 - Method for removing contaminants from aqueous fiber suspension, particularly waste paper suspension, involves introducing inner flow of gas in inner side of flow of fiber suspension, where open jet is formed at fiber suspension - Google Patents
Method for removing contaminants from aqueous fiber suspension, particularly waste paper suspension, involves introducing inner flow of gas in inner side of flow of fiber suspension, where open jet is formed at fiber suspension Download PDFInfo
- Publication number
- DE102008056040A1 DE102008056040A1 DE200810056040 DE102008056040A DE102008056040A1 DE 102008056040 A1 DE102008056040 A1 DE 102008056040A1 DE 200810056040 DE200810056040 DE 200810056040 DE 102008056040 A DE102008056040 A DE 102008056040A DE 102008056040 A1 DE102008056040 A1 DE 102008056040A1
- Authority
- DE
- Germany
- Prior art keywords
- flow
- section
- fiber suspension
- gassing
- 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- Withdrawn
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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
- B03D1/14—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
- 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
-
- 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
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Entfernung von Störstoffen aus einer wässrigen Papierfasersuspension gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a method for removing contaminants from an aqueous paper fiber suspension 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 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. Weil dabei nicht alle Feststoffe ausflotiert, sondern Fasern von Verunreinigungen getrennt werden, spricht man von selektiver Flotation. Der ebenfalls benutzte Begriff „Flotationsdeinking” wird in der Regel nicht nur für die Entfernung von Druckfarbenpartikeln (ink = Druckfarbe), sondern auch allgemeiner für die selektive Flotation von 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 unwanted contaminant particles in the way that the pulp due to its rather hydrophilic Character in the fiber suspension remains while the addressed Störstoffteilchen are hydrophobic and therefore together get into the foam with the air bubbles. Because not all Solids floated, but fibers separated from impurities This is called selective flotation. The also used Term "flotation deinking" is usually used not only for the removal of ink particles (inc = Printing ink), but also more general for the selective Flotation of impurities from pulp suspensions used. Such substances are in particular glue, fine plastic particles and possibly also resins.
Der Stand der Technik bezüglich Flotationsverfahren für Faserstoffsuspensionen ist bereits sehr weit fortgeschritten. Daher gibt es Lösungen, welche durchaus geeignet sind, einen großen Teil der Feststoffpartikel durch Flotation zu entfernen. Das gilt besonders für Verfahren, bei denen die Faserstoffdichte (Anteil der Fasern an der Gesamtmasse der Faserstoffsuspension) der zu flotierenden Faserstoffsuspension bei ca. 1% liegt. Höhere Stoffdichten (z. B. 1,3 bis 2,2%) führen in der Regel zu einem Effektivitätsverlust, z. B. geringerer Endweiße und/oder höherem Schmutzpunktgehalt. Da Flotationsanlagen relativ aufwändig in der Beschaffung und im Betrieb sind, ist es ein wichtiges Ziel der Weiterentwicklung, deren Wirksamkeit zu verbessern oder den notwendigen Aufwand für das Erreichen desselben Ergebnisses zu reduzieren.Of the Prior art relating to flotation for Pulp suspensions are already very advanced. Therefore There are solutions that are quite suitable, one remove large part of the solid particles by flotation. This is especially true for processes in which the pulp density (proportion the fibers of the total mass of pulp suspension) to be floated Pulp suspension is about 1%. Higher fabric densities (eg 1.3 to 2.2%) usually lead to a loss of effectiveness, z. B. lower final white and / or higher dirt content. Because flotation plants are relatively expensive in procurement and in operation, it is an important goal of advancement whose To improve effectiveness or the necessary effort for to reduce the achievement of the same result.
Aus
der
Eine
andere Publikation, die
Der Erfindung liegt die Aufgabe zu Grunde, Wirtschaftlichkeit und Effektivität des Verfahrens weiter zu verbessern. Insbesondere soll es möglich werden, dass auch bei ungünstigen Betriebsbedingungen, z. B. bei Faserstoffdichten, die höher liegen (bei ca. 1,3 bis 2,2%) als üblich (bei ca. 1%) eine effektive Entfernung von flotierbaren Störstoffen erfolgt.Of the Invention is the object of the economy and efficiency of the process on. In particular, it should be possible that even under unfavorable operating conditions, z. B. at pulp densities that are higher (at approx. 1.3 to 2.2%) than usual (at about 1%) an effective distance carried out by floatable impurities.
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 24 bis 39 beschreiben vorteilhafte Vorrichtungen zur Durchführung des Verfahrens.The Subclaims 24 to 39 describe advantageous devices to carry out the process.
Mit Hilfe des erfindungsgemäßen Verfahrens ist es möglich, die Vermischung der Fasersuspension mit Gas zur Erzeugung von zur Flotation geeigneten Gasblasen entscheidend zu verbessern und/oder den Energiebedarf zu senken. Ferner ist eine höhere Stoffdichte möglich, die an sich einen erhöhten Widerstand gegen die Vermischung mit Gasblasen und deren gleichmäßige Verteilung bedingt.With Help of the method according to the invention is it possible, the mixing of the fiber suspension with gas for Generation of suitable for flotation gas bubbles crucial improve and / or reduce energy needs. Furthermore, a Higher consistency possible, which in itself a increased resistance to mixing with gas bubbles and their uniform distribution.
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:
Die
in
Ein
zentrales Begasungsrohr
Die
Vermischung der Suspension mit Gasblasen und das Anlagern der Störstoffe
an die Gasblasen in der Mischvorrichtung
Andere
vorteilhafte Ausgestaltungen des Mischbereiches
Das
Begasungsrohr
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 Vorrichtung mit Gasblasen zu
vermischen. So können mehrere nebeneinander liegende Suspensionsströme
in einer Mischvorrichtung
In
Bei
Flotationsanlagen, die zur Papierproduktion eingesetzt werden, durchströmt
die Fasersuspension zumeist mehrere Flotationszellen
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 3144386 A1 [0004] DE 3144386 A1 [0004]
- - DE 3120202 A1 [0005] - DE 3120202 A1 [0005]
Claims (39)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810056040 DE102008056040A1 (en) | 2008-11-05 | 2008-11-05 | Method for removing contaminants from aqueous fiber suspension, particularly waste paper suspension, involves introducing inner flow of gas in inner side of flow of fiber suspension, where open jet is formed at fiber suspension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810056040 DE102008056040A1 (en) | 2008-11-05 | 2008-11-05 | Method for removing contaminants from aqueous fiber suspension, particularly waste paper suspension, involves introducing inner flow of gas in inner side of flow of fiber suspension, where open jet is formed at fiber suspension |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008056040A1 true DE102008056040A1 (en) | 2010-05-06 |
Family
ID=42063100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810056040 Withdrawn DE102008056040A1 (en) | 2008-11-05 | 2008-11-05 | Method for removing contaminants from aqueous fiber suspension, particularly waste paper suspension, involves introducing inner flow of gas in inner side of flow of fiber suspension, where open jet is formed at fiber suspension |
Country Status (1)
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DE (1) | DE102008056040A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009040318A1 (en) * | 2009-09-05 | 2011-03-10 | Voith Patent Gmbh | Method for removing impurities from waste paper suspension, involves forming suspension jet, and pulling surface of suspension jet accessible to supplied gas during or after discharge from jet forming channel |
DE102014012666A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Process and apparatus for cleaning contaminated solid-liquid mixtures |
Citations (3)
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 |
DE3144386A1 (en) | 1981-11-07 | 1983-05-19 | J.M. Voith Gmbh, 7920 Heidenheim | INJECTOR APPARATUS WITH A CONSTRUCTION POINT OF THESE MIXING TUBE |
AT408957B (en) * | 2000-02-03 | 2002-04-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR VENTILATING DISPERSIONS |
-
2008
- 2008-11-05 DE DE200810056040 patent/DE102008056040A1/en not_active Withdrawn
Patent Citations (3)
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 |
DE3144386A1 (en) | 1981-11-07 | 1983-05-19 | J.M. Voith Gmbh, 7920 Heidenheim | INJECTOR APPARATUS WITH A CONSTRUCTION POINT OF THESE MIXING TUBE |
AT408957B (en) * | 2000-02-03 | 2002-04-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR VENTILATING DISPERSIONS |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009040318A1 (en) * | 2009-09-05 | 2011-03-10 | Voith Patent Gmbh | Method for removing impurities from waste paper suspension, involves forming suspension jet, and pulling surface of suspension jet accessible to supplied gas during or after discharge from jet forming channel |
DE102014012666A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Process and apparatus for cleaning contaminated solid-liquid mixtures |
WO2016026477A1 (en) | 2014-08-22 | 2016-02-25 | Rithco Papertec Gmbh | Method and device for cleaning fiber suspensions by means of flotation |
US10799885B2 (en) | 2014-08-22 | 2020-10-13 | Rithco Papertec Gmbh | Method and device for cleaning fiber suspensions by means of flotation |
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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 |
Effective date: 20130601 |