DE102008013458A1 - Method for eliminating extraneous material from aqueous fiber suspension, particularly waste paper suspension, involves accomplishing fractionation of aqueous fiber suspension for forming fine fraction and coarse fraction - Google Patents
Method for eliminating extraneous material from aqueous fiber suspension, particularly waste paper suspension, involves accomplishing fractionation of aqueous fiber suspension for forming fine fraction and coarse fraction Download PDFInfo
- Publication number
- DE102008013458A1 DE102008013458A1 DE200810013458 DE102008013458A DE102008013458A1 DE 102008013458 A1 DE102008013458 A1 DE 102008013458A1 DE 200810013458 DE200810013458 DE 200810013458 DE 102008013458 A DE102008013458 A DE 102008013458A DE 102008013458 A1 DE102008013458 A1 DE 102008013458A1
- Authority
- DE
- Germany
- Prior art keywords
- fractionation
- solids content
- fraction
- fine fraction
- 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- Withdrawn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
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
-
- 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
- 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
-
- 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
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/40—Washing the fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
-
- 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 gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a method according to the preamble of claim 1.
Verfahren der genannten Art werden verwendet, um aus einer Faserstoffsuspension zumindest den überwiegenden Teil der darin suspendierten unerwünschten Feststoffteilchen, die sogenannten Störstoffe, auszuscheiden. So kann z. B. mit einer Flotation ein die auszuscheidenden Stoffe enthaltender Schaum oder Schwimmschlamm gebildet werden. Ein typischer Anwendungsfall eines derartigen Verfahrens ist die Aufbereitung von einer aus bedrucktem Altpapier gewonnenen wässrigen Fasersuspension, in der die Druckfarbenpartikel bereits von Fasern abgelöst werden, so dass sie sich ausflotieren oder auswaschen lassen. Der dazu geeignete Flotationsvorgang nutzt die Unterschiede zwischen Papierfaserstoff und unerwünschten Feststoffteilchen in der Art, dass der Faserstoff auf Grund seines eher hydrophilen Charakters in der Fasersuspension verbleibt, während die angesprochenen Feststoffteilchen hydrophob sind und deshalb zusammen mit den Luftblasen in den Schaum gelangen. Bei einem Waschvorgang werden die feinen Störstoffe mit dem Filtrat ausgewaschen.method The said type are used to make a pulp suspension at least the majority of the unwanted suspended therein Solid particles, the so-called impurities, excrete. So z. B. with a flotation a the excreted substances containing foam or scum are formed. A typical one Use case of such a method is the treatment from an aqueous recovered from printed paper Fiber suspension in which the ink particles are already made of fibers be detached so that they float or wash out to let. The appropriate flotation process uses the differences between paper pulp and unwanted solid particles in the way that the pulp due to its rather hydrophilic Character in the fiber suspension remains while the addressed solid particles are hydrophobic and therefore together get into the foam with the air bubbles. In a washing process The fine impurities are washed out with the filtrate.
Neben den Druckfarbenpartikeln gibt es auch eine Vielzahl weiterer Stoffe, die hydrophob sind und sich daher durch Flotation von dem Faserstoff trennen lassen. Solche Stoffe sind insbesondere Kleber, feine Kunststoffpartikel und eventuell auch Harze.Next There are also many other substances in the ink particles which are hydrophobic and therefore by flotation of the pulp disconnect. Such substances are in particular glue, fine plastic particles and possibly also resins.
Weit
verbreitet sind Verfahren mit zwei aufeinander folgenden Flotationsschritten,
zwischen denen eine mechanische Behandlung durchgeführt wird.
So ist es aus der
Solche
Verfahren sind sehr wirksam, aber relativ aufwändig, da
jeder Teilschritt eine vollständige Flotation für
den gesamten Papierfaserstoff enthält. Auch die Teilstrombehandlung
nach einer Fraktionierung ist bereits vorgeschlagen worden, wie
z. B. die
Der Erfindung liegt die Aufgabe zu Grunde, ein Aufbereitungsverfahren zu schaffen, mit dem eine möglichst effektive Ausscheidung der Störstoffpartikel, insbesondere einschließlich der größeren Druckfarbenpartikel, erzielbar ist, die beim fertigen Papier zu Schmutzpunkten führen können.Of the Invention is based on the object, a treatment process to create, with the most effective elimination the contaminant particles, in particular including the larger ink particles, is achievable, which can lead to dirt dots on the finished paper.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.These The object is solved by the features of claim 1.
Das erfindungsgemäße Verfahren nutzt die an sich bekannten Möglichkeiten, die sich daraus ergeben, dass nur ein Teil der Faserstoffsuspension dispergiert wird, und zwar der, in dem die Fasern mit daran anhaftenden Störstoffpartikeln angereichert sind. Durch die im Anspruch 1 erwähnte Wäsche der Feinfraktion wird das Ergebnis des Verfahrens weiter verbessert, da die in die Feinfraktion gelangten Fasern, insbesondere Kurzfasern, mit anhaftenden Druckfarbenpartikeln mit dem bei der Wäsche gebildeten Dickstoff abgeführt werden. Sie können dann durch Dispergieren von der Faser gelöst und so weit zerkleinert werden, dass sie leichter zu entfernen, insbesondere zu flotieren, sind.The inventive method uses the known Possibilities that result from being only a part the pulp suspension is dispersed, namely, in which the fibers are enriched with contaminant particles adhering thereto. By mentioned in claim 1 washing the fine fraction the result of the procedure will be further improved, since the in the Fine fraction came fibers, especially short fibers, with adhering ink particles removed with the thick substance formed during the wash become. You can then disperse by the fiber dissolved and crushed so much that they are lighter to remove, in particular to float, are.
Bekanntlich haben nicht entfernte Druckfarbenpartikel je nach ihrer Größe einen unterschiedlichen Einfluss auf die Qualität des hergestellten Papiers. Kleinere Partikel verschlechtern eher den Weißgrad, größere führen eher zu sichtbaren Schmutzpunkten. Da sich größere Druckfarbenpartikel nicht sicher ausflotieren lassen, ist es günstig, sie vor der Flotation zu zerkleinern.generally known have not removed ink particles depending on their size a different influence on the quality of the produced Paper. Smaller particles tend to degrade the whiteness, larger ones tend to lead to visible dirt spots. Because larger ink particles are not safe float, it is convenient to float before flotation to crush.
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
Fraktionierung
Wie
die
Die
Grobfraktion G4 der Fraktionierung
Das
Filtrat F5 kann ohne weitere Dispergierung in der Flotation
Die
Die
Konsistenz der Grobfraktion G4 aus der Fraktionierung
Nach
der Dispergierung
Wie
in
Der
bei der Flotation
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 10132743 A1 [0004] - DE 10132743 A1 [0004]
- - DE 102005060475 A1 [0005] - DE 102005060475 A1 [0005]
- - DE 3005681 [0018] - DE 3005681 [0018]
- - DE 102006020215 A1 [0018] - DE 102006020215 A1 [0018]
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810013458 DE102008013458A1 (en) | 2008-03-10 | 2008-03-10 | Method for eliminating extraneous material from aqueous fiber suspension, particularly waste paper suspension, involves accomplishing fractionation of aqueous fiber suspension for forming fine fraction and coarse fraction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810013458 DE102008013458A1 (en) | 2008-03-10 | 2008-03-10 | Method for eliminating extraneous material from aqueous fiber suspension, particularly waste paper suspension, involves accomplishing fractionation of aqueous fiber suspension for forming fine fraction and coarse fraction |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008013458A1 true DE102008013458A1 (en) | 2009-09-17 |
Family
ID=40952909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810013458 Withdrawn DE102008013458A1 (en) | 2008-03-10 | 2008-03-10 | Method for eliminating extraneous material from aqueous fiber suspension, particularly waste paper suspension, involves accomplishing fractionation of aqueous fiber suspension for forming fine fraction and coarse fraction |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008013458A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014131592A1 (en) * | 2013-03-01 | 2014-09-04 | Voith Patent Gmbh | Method for forming and handling a fiber suspension |
WO2014135335A1 (en) * | 2013-03-07 | 2014-09-12 | Voith Patent Gmbh | Fibrous material preparation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005681A1 (en) | 1980-02-06 | 1981-08-13 | Escher Wyss Gmbh, 7980 Ravensburg | SCREENING MACHINE |
DE10132743A1 (en) | 2001-07-05 | 2003-01-16 | Voith Paper Patent Gmbh | Recovery of at least two different paper fractions, from pulped used paper for recycling, the fraction which is less well pulped is separated for further intensive pulping into the second fraction |
DE102006020215A1 (en) | 2006-05-02 | 2007-11-08 | Voith Patent Gmbh | Fractionating paper fiber suspensions, to give fiber-enriched and fines-enriched fractions, by wet sieving to obtain long and short fiber fractions and further wet sieving short fiber fraction |
-
2008
- 2008-03-10 DE DE200810013458 patent/DE102008013458A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005681A1 (en) | 1980-02-06 | 1981-08-13 | Escher Wyss Gmbh, 7980 Ravensburg | SCREENING MACHINE |
DE10132743A1 (en) | 2001-07-05 | 2003-01-16 | Voith Paper Patent Gmbh | Recovery of at least two different paper fractions, from pulped used paper for recycling, the fraction which is less well pulped is separated for further intensive pulping into the second fraction |
DE102006020215A1 (en) | 2006-05-02 | 2007-11-08 | Voith Patent Gmbh | Fractionating paper fiber suspensions, to give fiber-enriched and fines-enriched fractions, by wet sieving to obtain long and short fiber fractions and further wet sieving short fiber fraction |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014131592A1 (en) * | 2013-03-01 | 2014-09-04 | Voith Patent Gmbh | Method for forming and handling a fiber suspension |
WO2014135335A1 (en) * | 2013-03-07 | 2014-09-12 | Voith Patent Gmbh | Fibrous material preparation |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20111001 |