DE4215532A1 - Used paper recycling - Google Patents

Used paper recycling

Info

Publication number
DE4215532A1
DE4215532A1 DE19924215532 DE4215532A DE4215532A1 DE 4215532 A1 DE4215532 A1 DE 4215532A1 DE 19924215532 DE19924215532 DE 19924215532 DE 4215532 A DE4215532 A DE 4215532A DE 4215532 A1 DE4215532 A1 DE 4215532A1
Authority
DE
Germany
Prior art keywords
flotation
fraction
foam
stage
selective
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Withdrawn
Application number
DE19924215532
Other languages
German (de)
Inventor
Michael Schwarz
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.)
JM Voith GmbH
Original Assignee
JM Voith 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
Priority claimed from DE19924206748 external-priority patent/DE4206748A1/en
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to DE19924215532 priority Critical patent/DE4215532A1/en
Priority to ES93101018T priority patent/ES2099850T3/en
Priority to EP93101018A priority patent/EP0558908B1/en
Priority to AT93101018T priority patent/ATE151131T1/en
Priority to DE59306004T priority patent/DE59306004D1/en
Priority to FI930777A priority patent/FI930777A/en
Priority to BR9300439A priority patent/BR9300439A/en
Priority to JP6320093A priority patent/JPH0641888A/en
Priority to US08/025,956 priority patent/US5358605A/en
Priority to TW82101569A priority patent/TW209263B/zh
Priority to NO930779A priority patent/NO301490B1/en
Priority to CA 2090987 priority patent/CA2090987A1/en
Priority to KR1019930003188A priority patent/KR930019929A/en
Publication of DE4215532A1 publication Critical patent/DE4215532A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

To process used paper, for recycling, a selective flotation is used for ink removal followed by at least one further cleaning flotation stage, using a multistage flotation for the selective flotation. The collected flotation foam is gathered together at the laest after the third flotation and cleaned in a total flotation through pressure relaxation. The foam, carrying impurities, is sepd. from the clear water and removed after further thicknening if required. The foam or sludge from the final first to third flotation stages or the second stage in a double flotation, is sepd. from the coarse dirt and fibres in one or two washing stages, and the fibres are further sepd. from the dirt. The fraction with a low fibre content is given a pressure redn. flotation to separate out the fine dirt. The fraction with a fibre content, and the clear water from the total flotation, are returned to a point in front of the flotation assembly. With a double-stage sieve action, the coarse particles in the first fraction are mostly retained. The material with a fibre content is sepd. as a third fraction at the second stage and returned to a point in front of the selective flotation. The material contd. in the fourth fraction, together with the first fraction, is passed to the total flotation.

Description

Die Erfindung betrifft ein Aufbereitungsverfahren von Altpapier entsprechend dem Oberbegriff des Patentanspruchs 1 bzw. dem Hauptpatent P 42 06 748. Bei dem Hauptpatent wird der stark verschmutzte Schaum in der Flotationsanlage gereinigt, die mittels Totalflotation alle festen Bestandteile weitgehend aus der Suspension ausscheidet und im allgemeinen als Druckentspannungsflotation ausgebildet ist (Mikroflotation).The invention relates to a processing method of Waste paper according to the generic term of Claim 1 or the main patent P 42 06 748. At the main patent is the heavily soiled foam in the Flotation system cleaned using total flotation all solid components largely from the suspension excretes and generally as Pressure relief flotation is formed (Microflotation).

Die Aufgabe der Erfindung ist es, eine möglichst geringe Belastung der Primärstufe der selektiven Flotationsanlage zu erreichen. Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.The object of the invention is to be as small as possible Load on the primary stage of the selective flotation plant to reach. This object is achieved according to the invention the characteristics of the characteristic part of the Claim 1 solved.

Man erreicht durch den Einsatz der Totalflotationsanlage, daß der abgezogene und in die Sekundär-Flotationsanlage der selektiven Flotation geleitete Schaum nicht mehr so stark mit Schmutz belastet ist, so daß es möglich ist, den Gutstoff der Sekundärstufe der selektiven Flotationsanlage ohne weitere Flotation als Gutstoff in den Prozeß weiterzuführen.One achieves by using the total flotation plant, that the withdrawn and in the secondary flotation plant the selective flotation directed foam no longer so is heavily contaminated with dirt so that it is possible the positive substance of the secondary level of the selective Flotation plant without further flotation as a good substance in to continue the process.

Nachfolgend wird die Erfindung anhand der Figur der Zeichnung erläutert.The invention is based on the figure of the Drawing explained.

Die nötigen Pumpen sind dabei nicht extra erwähnt und dargestellt.The necessary pumps are not mentioned and shown.

Die Primärstufe der selektiven Flotationsanlage 1 weist hintereinandergeschaltete Flotationszellen 10 auf, denen eine Schaumrinne zugeordnet ist, die hier in zwei Teile 12 und 12′ unterteilt ist. Der Schaum des ersten Teils 12 wird der mit vorgeschaltetem Gasreaktor 41 versehenen Totalflotationsanlage 39 zugeführt. Der restliche Schaum gelangt zur Sekundärstufe 34 der selektiven Flotation, die hier aus zwei hintereinandergeschalteten Stufen 34′ und 34′′ besteht. Die Schaumrinne ist mit 14 bezeichnet. Der dort vorhandene Schaum kann verworfen werden, oder aber besser noch in die Totalflotationsanlage 13 eingeleitet werden. Es wird in dieser ein Schlamm, der verworfen wird und Klarwasser erzeugt, das über Leitung 22 vor die Hauptflotationsanlage (Primärstufe) geleitet wird oder teilweise eingeleitet werden kann. Es wird der Schaum von ein bis drei ersten Stufen 13′, 13′′ der Primär-Flotationsanlage in die Totalflotationsanlage 39 eingeleitet. Der Schaum der dann noch in dem Teil 12′ der Schaumrinne der Primärstufe verbleibt, ist dann nicht mehr so stark mit Schmutzanteilen belastet, so daß der Gutstoff der Sekundär-Flotationsanlage 34 nicht weiter flotiert zu werden braucht. Bisher war es nämlich üblich, diesen Gutstoff wieder vor die Primärstufe 13 zurückzuleiten, was eine große Belastung dieser Primärstufe, insbesondere hinsichtlich dieser ersten Flotationszellen 13′, 13′′ bedeutete.The primary stage of the selective flotation system 1 has flotation cells 10 connected in series, to which a foam channel is assigned, which here is divided into two parts 12 and 12 '. The foam of the first part 12 is fed to the total flotation system 39 provided with an upstream gas reactor 41 . The remaining foam reaches the secondary stage 34 of selective flotation, which here consists of two stages 34 'and 34 ''connected in series. The foam channel is designated 14 . The foam present there can be discarded, or better still be introduced into the total flotation system 13 . In this sludge is discarded and produces clear water, which is passed via line 22 upstream of the main flotation plant (primary stage) or can be partially introduced. The foam is introduced from one to three first stages 13 ', 13 ''of the primary flotation system into the total flotation system 39 . The foam then remains in the part 12 'of the foam channel of the primary stage, is then no longer so heavily loaded with dirt, so that the accepted material of the secondary flotation system 34 does not need to be floated further. So far, it has been customary to return this accept back to the primary stage 13 , which meant a great strain on this primary stage, particularly with regard to these first flotation cells 13 ', 13 ''.

Eine Anlage mit Wasch- und/oder Siebeinrichtungen eventuell auch als Kombination ist mit 35 strichpunktiert angedeutet./ A plant with washing and screening devices or possibly as a combination is indicated by dash-dotted with 35th

Claims (3)

1. Aufbereitungsverfahren für Altpapier mit einer selektiven Flotation, bei der die selektive Flotation mehrstufig erfolgt und spätestens nach der dritten Flotationsstufe der bis dahin angesammelte Flotationsschaum abgezogen und mittels einer Totalflotation (Druckentspannungsflotation) gereinigt wird, die mindestens Klarwasser und davon getrennt die Verschmutzungen enthaltenden Schlamm erzeugt, wonach der Schlamm - gegebenenfalls nach weiterer Eindickung - aus dem Papierverarbeitungsprozeß abgeleitet wird, dadurch gekennzeichnet, daß der restliche Schaum der selektiven Flotation (1) in eine ein- bis dreistufige Sekundär-Flotationsanlage (6) geleitet wird, deren Gutstoff nicht weiter flotiert wird.1.Processing process for waste paper with a selective flotation, in which the selective flotation takes place in several stages and at the latest after the third flotation stage the flotation foam which has accumulated up to that point is removed and cleaned by means of a total flotation (pressure relaxation flotation) which produces at least clear water and the sludge containing it separately , After which the sludge - if necessary after further thickening - is derived from the paper processing process, characterized in that the remaining foam of the selective flotation ( 1 ) is passed into a one to three-stage secondary flotation plant ( 6 ), the accept material of which is not further flotated . 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Gutstoff der Sekundär-Flotationsanlage (6) dem Gutstoff der Primär-Flotationsanlage (1) beigemengt wird.2. The method according to claim 1, characterized in that the accept of the secondary flotation system ( 6 ) is added to the accept of the primary flotation system ( 1 ). 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß höchstens der Schaum der zwei ersten Stufen (10) der Primärstufe der selektiven Flotation (1) in die Totalflotationsanlage (2) geleitet wird.3. The method according to claim 1 or 2, characterized in that at most the foam of the two first stages ( 10 ) of the primary stage of selective flotation ( 1 ) is passed into the total flotation system ( 2 ).
DE19924215532 1992-03-04 1992-05-12 Used paper recycling Withdrawn DE4215532A1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
DE19924215532 DE4215532A1 (en) 1992-03-04 1992-05-12 Used paper recycling
ES93101018T ES2099850T3 (en) 1992-03-04 1993-01-23 PROCEDURE FOR THE TREATMENT OF USED PAPER.
EP93101018A EP0558908B1 (en) 1992-03-04 1993-01-23 Process and treatment of waste paper
AT93101018T ATE151131T1 (en) 1992-03-04 1993-01-23 PROCESSING AND PROCESS OF WASTE PAPER
DE59306004T DE59306004D1 (en) 1992-03-04 1993-01-23 Processing and processing of waste paper
FI930777A FI930777A (en) 1992-03-04 1993-02-22 FOERAEDLING OCH FOERFARANDE FOER AVFALLSPAPPER
JP6320093A JPH0641888A (en) 1992-03-04 1993-02-26 Method for controlling used paper
BR9300439A BR9300439A (en) 1992-03-04 1993-02-26 OLD PAPER PREPARATION PROCESS
US08/025,956 US5358605A (en) 1992-03-04 1993-03-03 Process for recycling waste paper
TW82101569A TW209263B (en) 1992-03-04 1993-03-03
NO930779A NO301490B1 (en) 1992-03-04 1993-03-03 Procedure for preparing waste paper
CA 2090987 CA2090987A1 (en) 1992-03-04 1993-03-04 Process for recycling waste paper
KR1019930003188A KR930019929A (en) 1992-03-04 1993-03-04 Waste Paper Separation Method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924206748 DE4206748A1 (en) 1992-03-04 1992-03-04 Used paper recycling
DE19924215532 DE4215532A1 (en) 1992-03-04 1992-05-12 Used paper recycling

Publications (1)

Publication Number Publication Date
DE4215532A1 true DE4215532A1 (en) 1993-11-18

Family

ID=25912467

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924215532 Withdrawn DE4215532A1 (en) 1992-03-04 1992-05-12 Used paper recycling

Country Status (1)

Country Link
DE (1) DE4215532A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125979A1 (en) * 2001-05-29 2002-12-12 Voith Paper Patent Gmbh Process to remove foreign bodies from a fluid suspension in a waste paper recovery process, has portion of floating foam from second-stage waste paper recovery tank skimmed and returned to the second-stage tank inlet
EP1443143A2 (en) * 2003-01-30 2004-08-04 Voith Paper Patent GmbH Method for removing contaminants from an aqueous fibrous suspension
US7439940B1 (en) 1993-01-07 2008-10-21 Maguire Jr Francis J Passive virtual reality

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7439940B1 (en) 1993-01-07 2008-10-21 Maguire Jr Francis J Passive virtual reality
DE10125979A1 (en) * 2001-05-29 2002-12-12 Voith Paper Patent Gmbh Process to remove foreign bodies from a fluid suspension in a waste paper recovery process, has portion of floating foam from second-stage waste paper recovery tank skimmed and returned to the second-stage tank inlet
EP1270804A2 (en) * 2001-05-29 2003-01-02 Voith Paper Patent GmbH Method for removing impurities from an aqueous paper fiber suspension
DE10125979C2 (en) * 2001-05-29 2003-05-15 Voith Paper Patent Gmbh Process for removing impurities from an aqueous paper fiber suspension
EP1270804A3 (en) * 2001-05-29 2003-12-03 Voith Paper Patent GmbH Method for removing impurities from an aqueous paper fiber suspension
EP1443143A2 (en) * 2003-01-30 2004-08-04 Voith Paper Patent GmbH Method for removing contaminants from an aqueous fibrous suspension
EP1443143A3 (en) * 2003-01-30 2007-05-16 Voith Patent GmbH Method for removing contaminants from an aqueous fibrous suspension

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