EP0828026B1 - Verfahren zur Reinigung einer Suspension aus Primärfaserstoff - Google Patents
Verfahren zur Reinigung einer Suspension aus Primärfaserstoff Download PDFInfo
- Publication number
- EP0828026B1 EP0828026B1 EP97112005A EP97112005A EP0828026B1 EP 0828026 B1 EP0828026 B1 EP 0828026B1 EP 97112005 A EP97112005 A EP 97112005A EP 97112005 A EP97112005 A EP 97112005A EP 0828026 B1 EP0828026 B1 EP 0828026B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flotation
- bleaching
- pulp
- stage
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title claims description 6
- 238000004061 bleaching Methods 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 3
- 239000002253 acid Substances 0.000 claims abstract 2
- 238000005188 flotation Methods 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims 1
- 238000009835 boiling Methods 0.000 abstract description 3
- 229920002678 cellulose Polymers 0.000 abstract description 3
- 239000001913 cellulose Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract description 2
- 229920003043 Cellulose fiber Polymers 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007380 fibre production Methods 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 1
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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.
- Primary fiber means e.g. chemical pulp, mechanical produced wood pulp or mixed forms, such as. B. TMP, CTMP, etc. During generation 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 removing any; 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 primary fiber-containing suspension.
- 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 pulp 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.
- the diagram shows an example of the application of the method Details of primary pulp production have not been entered as they are known to those skilled in the art are already known and a variety of different processes is possible.
- the Raw material R is added to a pulp cooker 1, in which it is thermally and chemically is 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.
- a further mechanical separation of the Pulp fibers required in the suspension It is usually superfluous to have one To carry out treatment in which the fiber itself is changed.
- the Primary fibrous material now enters the flotation 7 as suspension S, whereby it, as here shown by way of example, can be subjected to a further cleaning 3 'which is carried out with
- highly effective cleaners e.g. in the hydrocyclone with at least 100 times Work gravitational acceleration.
- Flotation 7 in this scheme is a selective one Flotation shown, in which the interfering impurities together with the Foam F are removed and the primary fiber fibers or at least the predominant part of them, not floated (selective flotation), but together with the water in the feed tank 8.
- the one in this template box 8 After further treatment, the collected material is suitable for paper production.
- the flotation can advantageously be carried out 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 (6)
- 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) 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) keine faserstoffverändernde Behandlung erfolgt. - Verfahren nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, daß die Flotation (7) im sauren Bereich durchgeführt wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Flotation (7) 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) 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 EP0828026A1 (de) | 1998-03-11 |
| EP0828026B1 true EP0828026B1 (de) | 2002-10-09 |
Family
ID=7804657
Family Applications (2)
| 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 |
| EP02000753A Revoked EP1223245B1 (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 |
|---|---|---|---|
| EP02000753A Revoked EP1223245B1 (de) | 1996-09-05 | 1997-07-15 | Verfahren zur Reinigung einer Suspension aus Primärfaserstoff |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP0828026B1 (de) |
| AT (2) | ATE225878T1 (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 EP97112005A patent/EP0828026B1/de not_active Expired - Lifetime
- 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 AT AT02000753T patent/ATE307923T1/de not_active IP Right Cessation
- 1997-07-15 DE DE59708425T patent/DE59708425D1/de not_active Expired - Fee Related
- 1997-07-15 DE DE59712461T patent/DE59712461D1/de not_active Revoked
Also Published As
| Publication number | Publication date |
|---|---|
| EP1223245B1 (de) | 2005-10-26 |
| DE19635967A1 (de) | 1998-03-12 |
| 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 |
| EP0828026A1 (de) | 1998-03-11 |
| ATE225878T1 (de) | 2002-10-15 |
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