EP0828026A1 - Verfahren zur Reinigung einer Suspension aus Primärfaserstoff - Google Patents
Verfahren zur Reinigung einer Suspension aus Primärfaserstoff Download PDFInfo
- Publication number
- EP0828026A1 EP0828026A1 EP97112005A EP97112005A EP0828026A1 EP 0828026 A1 EP0828026 A1 EP 0828026A1 EP 97112005 A EP97112005 A EP 97112005A EP 97112005 A EP97112005 A EP 97112005A EP 0828026 A1 EP0828026 A1 EP 0828026A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flotation
- suspension
- bleaching
- pulp
- cleaning
- 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.)
- Granted
Links
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Classifications
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
Definitions
- the invention relates to a method according to the preamble of claim 1.
- Primary fiber is understood to mean e.g. B. chemically produced pulp, mechanically produced wood pulp or mixed forms, such as. B. TMP, CTMP, etc.
- B. chemically produced pulp such as. B. TMP, CTMP, etc.
- These primary fibers are made from wood by boiling and bleaching originating lignin components essentially removed. Nevertheless, often remain undesirable, solid, colloidally dissolved or dissolved components, such as. B. resins, Bark particles or small fragments.
- These components are already being tried at least in part through highly effective sorting and cleaning processes remove; however, such procedures are complex on the one hand and on the other Page not always completely satisfactory. Therefore, it often has to be accepted that the primary fibers are not clean, i.e. the paper made from them Has dirt spots or that this results in poor paper machine runability results.
- the invention has for its object to a method of the type specified create with which it is possible to reliably remove residual impurities from the to remove suspension containing primary fibers.
- the purpose of the pulp produced are qualitatively improved and / or the production process becomes more economical let it be designed.
- the flotation is particularly advantageous in the Primary fiber generation used, for. B. left over in pulp boiling or bleaching to remove remaining interfering components.
- the fiber behave such impurities hydrophobic. It is also possible to use chemical To make treatment hydrophobic.
- Another advantage of the process is that of considering the overall economy the pulp production plant in which the process is used. Because through the mentioned possibilities for better removal of unwanted, fine components Requirements for the actual manufacturing and bleaching process kept lower considered overall, there is the possibility of an inexpensive Primary fiber production.
- Primary fiber production becomes various natural, grown raw materials used in the same batch depending on origin, genus, type, climate, biological conditions, etc. have quite different properties can. In many cases it is therefore only possible with great effort or not at all, e.g. B. to coordinate the cooking process for primary fiber production so that this heterogeneous raw material can be processed optimally, in this context freedom from undesirable components is meant. After all, at the Primary fiber production also other important requirements, such as. B. strength, Fiber length etc. are taken into account, which becomes a very complex Manufacturing process leads.
- FIG. 1 represents an example of the application of the method will not go into the details of primary pulp production, because it Are already known to a person skilled in the art and a large number of different processes are possible is.
- the raw material R is added to a pulp cooker 1, in which it is thermally and is chemically converted to pulp P.
- the cooking process is followed by a thickening stage 2 Partial return of the washed-out lye to the cellulose cooker 1.
- the thickened Pulp P ' is now in a cleaning stage 3, which is indicated here as a sorting stage, freed from disruptive components. This cleaning level can also be used with others work on known separation processes.
- the pulp comes in one Bleaching level 4 or a bleaching sequence that can consist of several bleaching levels, where only 4 'is given here as a further one.
- the substance is diluted with water W and collected in a chest 6.
- This primary fiber material now enters the suspension S in the Flotation 7, whereby, as shown here by way of example, a further cleaning 3 ' can be subjected, which can advantageously be highly effective cleaners.
- Flotation 7 shows a selective flotation in this figure, in which the disruptive Impurities are removed together with the foam F and the Primary fiber fibers get into the feed tank 8 together with the water.
- collected material is after further treatment Suitable for paper production.
- the thickening stage 9 can advantageously aim for an optimal washing effect.
- the Clear water 11 of the flotation z. B. can be used again for dilution.
- the thickened suspension contains the purified primary fiber and is in the Cloth chest 12 collected.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
Claims (7)
- Verfahren zur Reinigung einer Suspension (S) aus gebleichten Primärfaserstoffen,
dadurch gekennzeichnet,
daß die Suspension (S) nach der Bleichstufe (4') oder im Anschluß an eine Bleichsequenz (4, 4') einer Flotation (7, 10) unterzogen wird, bei der mit Hilfe von Luft zumindest ein Teil der störenden Verunreinigungen in einem Schaum (F) aufkonzentriert und mit diesem entfernt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß bei der Flotation (7) der überwiegende Teil der Fasern nicht flotiert wird (Selektiv-Flotation). - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß zwischen der Bleichstufe (4') bzw. der Bleichsequenz (4) und der Flotation (7, 10) keine faserstoffverändernde Behandlung erfolgt. - Verfahren zur Reinigung einer Suspension aus gebleichten Primärfaserstoffen,
dadurch gekennzeichnet,
daß die Suspension (S) nach der Bleichstufe (4') oder im Anschluß an eine Bleichsequenz (4, 4') einer Eindickung oder Wäsche zugeführt wird und das dabei anfallende Filtrat in einer Flotation (10), vorzugsweise einer Mikroflotation, behandelt wird, in der der überwiegende Teil der Feststoffe ausflotiert wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Flotation (7, 10) im sauren Bereich durchgeführt wird. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Flotation (7, 10) im neutralen Bereich durchgeführt wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Suspension (S) zwischen Bleichstufe (4') bzw. Bleichsequenz (4, 4') und Flotation (7, 10) im Hydrozyklon mit mindestens hundertfacher Erdbeschleunigung gereinigt wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02000753A EP1223245B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19635967A DE19635967A1 (de) | 1996-09-05 | 1996-09-05 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
DE19635967 | 1996-09-05 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000753A Division EP1223245B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0828026A1 true EP0828026A1 (de) | 1998-03-11 |
EP0828026B1 EP0828026B1 (de) | 2002-10-09 |
Family
ID=7804657
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000753A Revoked EP1223245B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
EP97112005A Expired - Lifetime EP0828026B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000753A Revoked EP1223245B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP1223245B1 (de) |
AT (2) | ATE225878T1 (de) |
DE (3) | DE19635967A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107700263A (zh) * | 2016-08-08 | 2018-02-16 | 迅普精工株式会社 | 脱墨装置和废纸再生处理装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109629300B (zh) * | 2018-12-28 | 2021-08-24 | 四川凤生纸业科技股份有限公司 | 用于纸浆生产线的高效制浆***及洗浆工艺 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0522334A1 (de) * | 1991-07-12 | 1993-01-13 | Nalco Chemical Company | Verfahren zur Behandlung von BCTMP/CTMP-Abwasser |
DE4317466A1 (de) * | 1993-05-26 | 1994-12-01 | Degussa | Verbessertes Verfahren zur Bleiche von Holzstoffen |
WO1996006978A1 (en) * | 1994-08-31 | 1996-03-07 | Hoffman Environmental Systems, Inc. | Method of papermaking having zero liquid discharge |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE310554C (de) * |
-
1996
- 1996-09-05 DE DE19635967A patent/DE19635967A1/de not_active Ceased
-
1997
- 1997-07-15 AT AT97112005T patent/ATE225878T1/de not_active IP Right Cessation
- 1997-07-15 EP EP02000753A patent/EP1223245B1/de not_active Revoked
- 1997-07-15 DE DE59708425T patent/DE59708425D1/de not_active Expired - Fee Related
- 1997-07-15 DE DE59712461T patent/DE59712461D1/de not_active Revoked
- 1997-07-15 AT AT02000753T patent/ATE307923T1/de not_active IP Right Cessation
- 1997-07-15 EP EP97112005A patent/EP0828026B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0522334A1 (de) * | 1991-07-12 | 1993-01-13 | Nalco Chemical Company | Verfahren zur Behandlung von BCTMP/CTMP-Abwasser |
DE4317466A1 (de) * | 1993-05-26 | 1994-12-01 | Degussa | Verbessertes Verfahren zur Bleiche von Holzstoffen |
WO1996006978A1 (en) * | 1994-08-31 | 1996-03-07 | Hoffman Environmental Systems, Inc. | Method of papermaking having zero liquid discharge |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107700263A (zh) * | 2016-08-08 | 2018-02-16 | 迅普精工株式会社 | 脱墨装置和废纸再生处理装置 |
CN107700263B (zh) * | 2016-08-08 | 2020-10-09 | 迅普精工株式会社 | 脱墨装置和废纸再生处理装置 |
Also Published As
Publication number | Publication date |
---|---|
DE59712461D1 (de) | 2005-12-01 |
EP0828026B1 (de) | 2002-10-09 |
DE19635967A1 (de) | 1998-03-12 |
ATE225878T1 (de) | 2002-10-15 |
EP1223245B1 (de) | 2005-10-26 |
EP1223245A3 (de) | 2004-06-02 |
ATE307923T1 (de) | 2005-11-15 |
EP1223245A2 (de) | 2002-07-17 |
DE59708425D1 (de) | 2002-11-14 |
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