EP1223245B1 - Verfahren zur Reinigung einer Suspension aus Primärfaserstoff - Google Patents
Verfahren zur Reinigung einer Suspension aus Primärfaserstoff Download PDFInfo
- Publication number
- EP1223245B1 EP1223245B1 EP02000753A EP02000753A EP1223245B1 EP 1223245 B1 EP1223245 B1 EP 1223245B1 EP 02000753 A EP02000753 A EP 02000753A EP 02000753 A EP02000753 A EP 02000753A EP 1223245 B1 EP1223245 B1 EP 1223245B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bleaching
- stage
- flotation
- pulp
- 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.)
- Revoked
Links
Images
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.
- the invention is based on the object, a method of the type specified create, with which it succeeds, remaining impurities reliably from the remove primary pulp suspension. This should be the produced pulp quality improvement and / or the production process becomes more efficient let shape.
- the flotation with particular advantage in the Primary fiber production used to z. B. in the pulp cooking or bleaching left over remove remaining interfering components. Unlike the fiber behave such impurities are hydrophobic. It is also possible by chemical Make treatment hydrophobic.
- Another advantage of the method is the consideration of the overall economy the pulp production plant in which the process is used. Because of the said possibilities for better Entferung unwanted, fine components Requirements for the actual manufacturing and bleaching process kept lower can be considered, the overall result of the possibility of a low-priced Primary pulp production.
- Primary pulp production becomes diverse natural, mature raw materials used in the same batch depending on origin, genus, species, climate, biological conditions, etc. have quite different characteristics can. In many cases, it is therefore only with great effort or not possible, for.
- B. vote the cooking process for primary pulp production so that this heterogeneous raw material can be optimally prepared, in this context the freedom of unwanted components is meant.
- the Primary pulp production also other important requirements, such. B. strength, Fiber length etc. are taken into account, resulting in a very complex Manufacturing process leads.
- the scheme is an example of the application of the method Details of the primary pulp production have not been received, as they are the expert are known anyway and a variety of different processes is possible.
- Raw material R is added to a digester 1 where it is thermally and chemically is converted to pulp P.
- the cooking process is followed by a thickening stage 2 with Partial recycling of washed lye in the digester 1.
- the thickened Pulp P ' is now in a purification stage 3, which is indicated here as a sorting stage, freed from interfering components. But this cleaning step can also be done with others work on known separation process.
- the pulp comes in one Bleaching stage 4 or a bleaching sequence, which may consist of several bleaching stages, with 4 'only one more is given here.
- the substance is diluted with water W and collected in a chest 6.
- a further mechanical separation of Pulp fibers in the suspension required. It is usually superfluous, one To carry out treatment in which the pulp itself is changed.
- the filtrate in the flotation 7 is performed. He can undergo further purification which can be advantageously used with highly effective cleaners, e.g. With work at least 100 times the acceleration of gravity.
- the thickening stage can be beneficial aim for optimal washing effect.
- the clear water 11 of the flotation may e.g. to the Thinning to be used again.
- the thickened suspension contains the purified Primary pulp and is collected in the Stoffbütte 8. He is after another Treatment suitable for paper production.
- the flotation can be carried out advantageously neutral or in an acidic environment.
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)
Description
Claims (7)
- 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 (7), vorzugsweise einer Mikroflotation, behandelt wird, in der der überwiegende Teil der Feststoffe ausflotiert wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die ausflotierten Feststoffe Störstoffe sind. - Verfahren nach Anspruch 2,
dadurch gekennzeichnet, dass die ausflotierten Feststoffe bei der Zellstoffkochung oder Bleiche übrig gebliebene störende Bestandteile sind. - Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, dass die Flotation (7) im neutralen Bereich durchgeführt wird. - Verfahren nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, dass die Flotation (7) im sauren Bereich durchgeführt wird. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass zwischen der Bleichstufe (4') bzw. der Bleichsequenz (4) und der Flotation (7) eine mechanische Vereinzelung der Zellstofffasern erfolgt, ohne dass die Fasern selbst verändert werden. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Suspension (S) zwischen Bleichstufe (4') bzw. Bleichsequenz (4, 4') und Flotation (7) im Hydrozyklon mit mindestens hundertfacher Erdbeschleunigung gereinigt wird.
Applications Claiming Priority (3)
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 | ||
EP97112005A EP0828026B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112005A Division EP0828026B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1223245A2 EP1223245A2 (de) | 2002-07-17 |
EP1223245A3 EP1223245A3 (de) | 2004-06-02 |
EP1223245B1 true EP1223245B1 (de) | 2005-10-26 |
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 After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112005A Expired - Lifetime EP0828026B1 (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) | ATE307923T1 (de) |
DE (3) | DE19635967A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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系统及洗浆工艺 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE310554C (de) * | ||||
US5178770A (en) * | 1991-07-12 | 1993-01-12 | Nalco Canada Inc. | Method of treating bctmp/ctmp wastewater |
DE4317466A1 (de) * | 1993-05-26 | 1994-12-01 | Degussa | Verbessertes Verfahren zur Bleiche von Holzstoffen |
CA2208269A1 (en) * | 1994-08-31 | 1996-03-07 | The Hoffman Group Ltd. | Method of papermaking having zero liquid discharge |
-
1996
- 1996-09-05 DE DE19635967A patent/DE19635967A1/de not_active Ceased
-
1997
- 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 EP EP97112005A patent/EP0828026B1/de not_active Expired - Lifetime
- 1997-07-15 AT AT02000753T patent/ATE307923T1/de not_active IP Right Cessation
- 1997-07-15 AT AT97112005T patent/ATE225878T1/de not_active IP Right Cessation
- 1997-07-15 DE DE59712461T patent/DE59712461D1/de not_active Revoked
Also Published As
Publication number | Publication date |
---|---|
EP1223245A3 (de) | 2004-06-02 |
EP1223245A2 (de) | 2002-07-17 |
DE59708425D1 (de) | 2002-11-14 |
ATE307923T1 (de) | 2005-11-15 |
DE59712461D1 (de) | 2005-12-01 |
ATE225878T1 (de) | 2002-10-15 |
EP0828026A1 (de) | 1998-03-11 |
DE19635967A1 (de) | 1998-03-12 |
EP0828026B1 (de) | 2002-10-09 |
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