EP0828026B1 - Procédé pour l'épuration d'une suspension de fibres primaires - Google Patents
Procédé pour l'épuration d'une suspension de fibres primaires 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
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
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- 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
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- 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)
Claims (6)
- Procédé d'épuration d'une suspension (S) constituée de matières fibreuses primaires blanchies, caractérisé en ce qu'après l'étape de blanchiment (4') ou à la suite d'une séquence de blanchiment (4, 4'), la suspension (S) est soumise à une flottation (7) au cours de laquelle au moins une partie des impuretés gênantes est concentrée, à l'aide d'air, dans une mousse (F) et est éliminée avec celle-ci.
- Procédé selon la revendication 1, caractérisé en ce qu'au cours de la flottation (7) la majeure partie des fibres n'est pas mise en flottation (flottation sélective).
- Procédé selon la revendication 1 ou 2, caractérisé en ce qu'aucun traitement modifiant la matière fibreuse n'est effectué entre l'étape de blanchiment (4') ou la séquence de blanchiment (4) et la flottation (7).
- Procédé selon l'une des revendications précédentes, caractérisé en ce que le flottation (7) est conduite dans le domaine acide.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la flottation (7) est conduite dans le domaine neutre.
- Procédé selon l'une des revendications précédentes, caractérisé en ce que la suspension (S) est épurée dans l'hydrocyclone, entre l'étape de blanchiment (4') ou la séquence de blanchiment (4, 4') et la flottation (7), avec une accélération au moins cent fois supérieure à l'accélération terrestre.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02000753A EP1223245B1 (fr) | 1996-09-05 | 1997-07-15 | Procédé d'épuration d'une suspension de fibres primaires |
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 (fr) | 1996-09-05 | 1997-07-15 | Procédé d'épuration d'une suspension de fibres primaires |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0828026A1 EP0828026A1 (fr) | 1998-03-11 |
EP0828026B1 true EP0828026B1 (fr) | 2002-10-09 |
Family
ID=7804657
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000753A Revoked EP1223245B1 (fr) | 1996-09-05 | 1997-07-15 | Procédé d'épuration d'une suspension de fibres primaires |
EP97112005A Expired - Lifetime EP0828026B1 (fr) | 1996-09-05 | 1997-07-15 | Procédé pour l'épuration d'une suspension de fibres primaires |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000753A Revoked EP1223245B1 (fr) | 1996-09-05 | 1997-07-15 | Procédé d'épuration d'une suspension de fibres primaires |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP1223245B1 (fr) |
AT (2) | ATE225878T1 (fr) |
DE (3) | DE19635967A1 (fr) |
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 (fr) * | ||||
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 |
EP0791103A4 (fr) * | 1994-08-31 | 1998-12-30 | Hoffman Environmental Systems | Procede de fabrication de papier sans aucune decharge de liquides |
-
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/fr 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/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59712461D1 (de) | 2005-12-01 |
DE19635967A1 (de) | 1998-03-12 |
EP0828026A1 (fr) | 1998-03-11 |
ATE225878T1 (de) | 2002-10-15 |
EP1223245B1 (fr) | 2005-10-26 |
EP1223245A3 (fr) | 2004-06-02 |
ATE307923T1 (de) | 2005-11-15 |
EP1223245A2 (fr) | 2002-07-17 |
DE59708425D1 (de) | 2002-11-14 |
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