WO2012013407A1 - Konstantteil einer maschine zur herstellung einer faserstoffbahn - Google Patents
Konstantteil einer maschine zur herstellung einer faserstoffbahn Download PDFInfo
- Publication number
- WO2012013407A1 WO2012013407A1 PCT/EP2011/059668 EP2011059668W WO2012013407A1 WO 2012013407 A1 WO2012013407 A1 WO 2012013407A1 EP 2011059668 W EP2011059668 W EP 2011059668W WO 2012013407 A1 WO2012013407 A1 WO 2012013407A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stream
- consistency
- cleaning
- consistency stream
- low
- 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.)
- Ceased
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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/26—De-aeration of paper stock
-
- 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
- D21F1/08—Regulating consistency
Definitions
- the invention relates to a process for producing a pulp suspension for producing a paper, board, tissue or other fibrous web by mixing at least one high consistency stream formed from recycled fiber and filler with at least one, preferably fresh, white water or the like , formed low-consistency stream in a machine for producing the fibrous web, wherein the high-consistency stream is cleaned and mixed before and after this cleaning with at least a partial stream of the low-consistency stream.
- the invention also relates to an arrangement for producing a pulp suspension for producing a paper, board, tissue or other fibrous web from at least one, made of recycled fiber and filler high-consistency stream and at least one, preferably fresh water, white water or the like.
- formed low-consistency stream in the constant part of a machine for producing the fibrous web the high-consistency stream is passed through at least one cleaning device and diluted before and after this cleaning device in at least one mixing device with a partial stream of low consistency stream, in particular for carrying out the method.
- the previously processed high-consistency accept is diluted with the collected in the paper machine white water, cleaned and degassed before it can be fed to the headbox of the paper machine.
- Fresh water is used to an ever smaller extent usually only in the paper machine used.
- the object of the invention is therefore to reduce the effort in the constant part with sufficient ventilation.
- the object has been achieved in that the high-consistency stream is degassed for the first time and in particular once after a mixing following the purification with a partial stream of the low-consistency stream.
- the high-consistency stream is passed through a degassing device for the first time and in particular once after a mixing device following the cleaning device.
- the cleaning devices may consist of several stages. It is also possible that only one or more mixing devices are upstream and / or downstream of the cleaning device. In this case, it is deliberately dispensed with a degassing of the supplied after degassing of the high-consistency stream partial flow of the low-consistency stream. This is acceptable, since the vast majority of the headbox supplied amount of fluid is degassed. Even with a headbox with directly supplied dilution water, the degassed portion of the headbox total supplied amount of fluid is about 85 to 90%.
- the maximum air content of less than 0.5% generally required for the headbox can be easily met.
- the cleaning devices such as cleaners or sorters, are often designed for relatively high consistency streams without exploiting their potential. Therefore, the consistency of the high consistency stream should be immediately before cleaning between 1, 5 and 3.5%, preferably more than 2%.
- degassing does not necessarily have to take place immediately after the cleaning, it is advantageous for degassing the largest possible portion of the pulp suspension if the high-consistency stream is degassed after the last cleaning following mixing with a partial flow of the low-consistency stream.
- the consistency of the high-consistency stream immediately before degassing is between 1 and 1, 5%.
- the low-consistency stream should therefore not be degassed or passed through any degassing device.
- the high-consistency stream after the last mixing device should preferably be guided via a cleaning unit to the headbox.
- This cleaning unit can also act degassing depending on the design.
- the reject of at least one usually arranged immediately before the headbox cleaning unit of high-consistency or low-consistency stream is passed to another cleaning unit the Accept is preferably performed to degasification.
- the high-consistency stream 1 is prepared in a manner known per se from fibrous materials and fillers in accordance with the specifications of the papermaker, i. combined in predetermined mixing ratios in a mixing chest and mixed.
- the high consistency stream 1 has a consistency of 3-4% and an air content in the range of about 3%.
- the high-consistency stream 1 is subsequently diluted several times, in this case specifically in two mixing devices 3, 4, with a partial stream of the low-consistency stream 2.
- the finished pulp suspension for sheet formation is placed on or between the former screens of the following former via one or more nozzles.
- the white water is collected and returned as a low consistency stream 2 in the constant part of the machine, so that as little fiber and fillers are lost and little fresh water is needed.
- the entire white water used for dilution in the mixing devices 3,4 and directly at the headbox 10 is not degassed.
- this After the first mixing device 3 for dilution of the high-consistency stream 1, this has a consistency of less than 3.5%, which allows the cleaning in a following cleaning device 5 in the form of a centrifugal separator.
- the relatively high consistency reduces due to the low throughput investment costs for the cleaning device 5, but is not so high that the efficiency of the cleaning device 5 is too much affected.
- the degassing device 6 Only then is the high-consistency stream 1 fed to a degassing device 6 in which the fluid is brought under reduced pressure to the boiling point and thus degassed. To compensate for throughput fluctuations, the degassing device 6 includes an overflow, the overflow stream is returned to the immediately preceding mixing device 4 and the high-consistency stream 1 is mixed. Thus, this at least partially degassed overflow current is not again performed by the cleaning device 4 contrary to the prior art, which relieves them.
- the high-consistency stream 1 is passed to the headbox 10 for safety via an additional cleaning unit 7 in the form of a vertical sight with a built-in screen basket (pressure sorter). If, as indicated in the figure, a partial flow of white water is fed directly to the headbox 10, this is done via a cleaning unit 9 also in the form of a vertical seal with built-in screen basket (pressure sorter). With the help of the white water so the basis weight cross profile can be influenced at the headbox 10 in a known manner.
- the reject of the two cleaning units 7, 9 in front of the headbox 10 is recirculated to increase the yield in a further purification unit 8 and its accept in the degassing device 6.
- the high-consistency stream 1 is passed before the cleaning device 5, before the degassing device 6 and before the last cleaning unit 7 via a respective material pump 1 1, 12,13.
- the number of required pumps is reduced by at least one.
- the amount of low-consistency stream 2 (white water) fed via the cleaning unit 9 to the headbox 10 directly via a low-consistency pump 14 usually comprises 10 to 15% of the total quantity of fluid supplied to the headbox 10.
- the white water usually has an air content of about 2% and the air content of 85% to 90% constituting high consistency stream 1 is less than 0.1%, can easily without degassing of the white water total air content of less than 0.5% Headbox 10 can be ensured.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11724243.8A EP2598690B1 (de) | 2010-07-30 | 2011-06-10 | Konstantteil einer maschine zur herstellung einer faserstoffbahn |
| CN201180037453.6A CN103154362B (zh) | 2010-07-30 | 2011-06-10 | 用于制备纤维幅的机器的进入系统 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010038694 DE102010038694A1 (de) | 2010-07-30 | 2010-07-30 | Konstantteil |
| DE102010038694.4 | 2010-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012013407A1 true WO2012013407A1 (de) | 2012-02-02 |
Family
ID=44263123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2011/059668 Ceased WO2012013407A1 (de) | 2010-07-30 | 2011-06-10 | Konstantteil einer maschine zur herstellung einer faserstoffbahn |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2598690B1 (de) |
| CN (1) | CN103154362B (de) |
| DE (1) | DE102010038694A1 (de) |
| WO (1) | WO2012013407A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013206638A1 (de) * | 2013-04-15 | 2014-10-30 | Voith Patent Gmbh | Drucksortierer-Rejektbehandlung |
| DE102013210004A1 (de) * | 2013-05-29 | 2014-05-15 | Voith Patent Gmbh | Konstantteil |
| DE102013209998A1 (de) * | 2013-05-29 | 2014-05-22 | Voith Patent Gmbh | Konstantteil-Mischvorrichtung |
| CN107447567A (zh) * | 2017-09-30 | 2017-12-08 | 枣庄市恒宇纸业有限公司 | 一种造纸机械浆的处理装置 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308384A (en) * | 1991-10-16 | 1994-05-03 | A. Ahlstrom Corporation | Deaeration vessel |
| WO1999064668A1 (en) * | 1998-06-10 | 1999-12-16 | Valmet Corporation | Process arrangement for the short circulation in a paper or board machine |
| WO2003023135A1 (en) * | 2001-09-07 | 2003-03-20 | Metso Paper, Inc. | Deaeration arrangement in connection with a paper machine or equivalent |
| WO2004072365A1 (en) | 2003-02-11 | 2004-08-26 | Metso Paper, Inc. | Apparatus and method in the treatment of the stock passed to a headbox of a paper machine or equivalent |
| WO2005088007A1 (en) * | 2004-03-15 | 2005-09-22 | Metso Paper, Inc. | Method for monitoring and controlling a papermaking process |
| EP1645684A1 (de) | 2004-10-09 | 2006-04-12 | Voith Paper Patent GmbH | Verfahren und Vorrichtung zur Regelung des Flächengewichtsquerprofils einer Faserstoffbahn |
| DE102007038090A1 (de) * | 2007-08-11 | 2009-02-12 | Voith Patent Gmbh | Konstantteil IV |
| DE102008061970A1 (de) * | 2008-12-12 | 2010-06-17 | Voith Patent Gmbh | Konstantteil-Sortierung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1218587B1 (de) * | 1999-09-21 | 2006-06-21 | Metso Paper, Inc. | Regelsystem für den kurzen umlauf und stoffauflauf in einer papiermaschine oder dergleichen |
| FI115540B (fi) * | 2000-12-29 | 2005-05-31 | Metso Paper Inc | Laitteisto massan johtamisessa paperikoneen tai vastaavan perälaatikkoon |
| FI115539B (fi) * | 2001-02-23 | 2005-05-31 | Metso Automation Oy | Menetelmä ja järjestelmä paperikoneen tai vastaavan lyhyen kierron säädössä |
| FI111391B (fi) * | 2001-04-23 | 2003-07-15 | Metso Paper Inc | Menetelmä ja prosessijärjestely paperikoneen lyhyessä kierrossa |
| DE102007038089A1 (de) * | 2007-08-11 | 2009-02-12 | Voith Patent Gmbh | Konstantteil |
-
2010
- 2010-07-30 DE DE201010038694 patent/DE102010038694A1/de not_active Withdrawn
-
2011
- 2011-06-10 EP EP11724243.8A patent/EP2598690B1/de not_active Not-in-force
- 2011-06-10 WO PCT/EP2011/059668 patent/WO2012013407A1/de not_active Ceased
- 2011-06-10 CN CN201180037453.6A patent/CN103154362B/zh not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308384A (en) * | 1991-10-16 | 1994-05-03 | A. Ahlstrom Corporation | Deaeration vessel |
| WO1999064668A1 (en) * | 1998-06-10 | 1999-12-16 | Valmet Corporation | Process arrangement for the short circulation in a paper or board machine |
| WO2003023135A1 (en) * | 2001-09-07 | 2003-03-20 | Metso Paper, Inc. | Deaeration arrangement in connection with a paper machine or equivalent |
| WO2004072365A1 (en) | 2003-02-11 | 2004-08-26 | Metso Paper, Inc. | Apparatus and method in the treatment of the stock passed to a headbox of a paper machine or equivalent |
| WO2005088007A1 (en) * | 2004-03-15 | 2005-09-22 | Metso Paper, Inc. | Method for monitoring and controlling a papermaking process |
| EP1645684A1 (de) | 2004-10-09 | 2006-04-12 | Voith Paper Patent GmbH | Verfahren und Vorrichtung zur Regelung des Flächengewichtsquerprofils einer Faserstoffbahn |
| DE102007038090A1 (de) * | 2007-08-11 | 2009-02-12 | Voith Patent Gmbh | Konstantteil IV |
| DE102008061970A1 (de) * | 2008-12-12 | 2010-06-17 | Voith Patent Gmbh | Konstantteil-Sortierung |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103154362B (zh) | 2015-10-21 |
| DE102010038694A1 (de) | 2012-02-02 |
| EP2598690A1 (de) | 2013-06-05 |
| CN103154362A (zh) | 2013-06-12 |
| EP2598690B1 (de) | 2014-04-23 |
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