WO1993022495A1 - Stoffauflaufeinrichtung für eine papiermaschine - Google Patents
Stoffauflaufeinrichtung für eine papiermaschine Download PDFInfo
- Publication number
- WO1993022495A1 WO1993022495A1 PCT/EP1993/000947 EP9300947W WO9322495A1 WO 1993022495 A1 WO1993022495 A1 WO 1993022495A1 EP 9300947 W EP9300947 W EP 9300947W WO 9322495 A1 WO9322495 A1 WO 9322495A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turbulence
- headbox
- headbox according
- generating elements
- downstream
- Prior art date
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
- D21F1/02—Head boxes of Fourdrinier machines
- D21F1/022—Means for injecting material into flow within the headbox
-
- 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
- D21F1/02—Head boxes of Fourdrinier machines
-
- 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
- D21F1/02—Head boxes of Fourdrinier machines
- D21F1/026—Details of the turbulence section
-
- 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
- D21F1/06—Regulating pulp flow
Definitions
- the invention relates to a material feed device for a paper machine according to the preamble of claim 1.
- Headboxes for paper machines have been built for a long time and in many variations.
- the so-called hydraulic headboxes in which the required turbulence is essentially generated by hydraulic measures, have proven particularly successful.
- tube bundles or step diffusers can be used, in which the pressure energy present in the feed device is partially converted into kinetic energy, that is to say turbulence.
- the turbulence generators are often constructed from individual turbulence generating elements connected in parallel.
- the invention has for its object to provide a headbox with the help of which the flow can be influenced in a particularly effective manner so that the desired flow shape can be set in the suspension jet leaving the headbox without disturbing the basis weight cross-sectional profile setting. Furthermore, the effort for these measures should be as low as possible.
- the invention takes advantage of the property of the hydraulic turbulence generators commonly used to divide the flow into a plurality of parallel individual flows. If - as described in the claims - the area between two successive turbulence generators is divided into chambers by partitions, the flow conditions can be changed in a targeted manner in these chambers by withdrawing or supplying liquid or gas, in particular air. Because of the partitions, this is differentiated, i.e. for each chamber individually, possible.
- the pressure can be differentiated by constant and controlled material suspension withdrawal from the above-mentioned chamber in such a way that an optimal flow is generated in the nozzle space, that is to say the space following the last turbulence generator.
- the supply of stock suspension or water can also - if regulated accordingly will - be used to influence the flow in the nozzle area.
- Figure 1 shows a headbox according to the invention, side view in section.
- FIG. 1 top view in section
- FIG. 3 side view of the headbox in a different position
- Fig. 4 -6 further embodiments of the fabric on it run, cut in side view.
- Fig. 1 you can see the essential parts of the substance according to the invention.
- the pulp intended for paper production can be distributed as an aqueous suspension through the suspension feed device 1 over the entire width of the headbox and from there into a first turbulence generator 2.
- This consists of a large number of turbulence generating elements 4, shown here using the example of step diffusers. But tube bundle or a thick perforated plate would also be conceivable.
- This is followed downstream by an intermediate space, which is followed by a further turbulence generator 3 with turbulence generation elements 5.
- the different turbulence generators can be designed differently.
- the subsequent nozzle space 7 is suitable for significantly accelerating the suspension flow during operation of the device and discharging it into the sheet formation area of the paper machine (not shown here) through the outlet gap 8 which can be adjusted, for example, with the aid of an indicated aperture 18.
- the space between two turbulence generators is delimited at the top and bottom by the outer walls 9 and 9 ' and laterally by outer walls 9 "(FIG. 2).
- This space is divided into several intermediate chambers 6 by the partition walls 10.
- the upper outer wall 9' is the Opening 11 is visible, as already mentioned, it is one of several, a pipe connection 12 connects this opening to a ring line 13 via a valve 14.
- the valve 14 is controlled by a regulator 15, which is indicated by arrows indicated signals processed. Such signals can originate from measurements on the paper web formed or can be empirical values.
- FIG. 2 shows the same device in plan view with cut turbulence generators 2 and 3 and a plurality of intermediate chambers 6 divided by partitions 10. At the end of the suspension feed device 1, an overflow 16 is visible.
- FIG. 3 shows an arrangement of the headbox directed obliquely downwards towards the paper machine screen 17, as a result of which the suspension feed device 1 has the relatively highest position.
- the headbox in FIG. 4 has an approximately rectangular deflection of the main flow direction in the area of the intermediate chambers 6. This redirection in particular can be of advantage because it enables the pressure and flow to be evened out.
- the same figure also shows a further modification, namely the combination of an upstream, highly effective 3-stage turbulence generator and a less effective 2-stage downstream. It is easy to see that the same combination can also bring advantages for headboxes without redirecting the main flow direction.
- Fig. 5 shows the section of a variant of the headbox acc. Fig. 4.
- an air cushion L is present in the intermediate chambers 6 above the suspension S and is connected to the tube 12.
- Such an air cushion can also be useful without redirecting the main flow direction in the intermediate chambers 6.
- the upstream turbulence generator 2 can also be shorter than the following one.
- FIG. 6 A further embodiment is shown in FIG. 6.
- the example there has a smaller number of turbulence generator 2 located upstream
- Turbulence generating elements than on the downstream 3. This makes the upstream turbulence generator cheaper to manufacture, but is for the intended purpose is still effective enough. In many cases, the suspension is supposed to be deflocculated by relatively rough turbulence.
- the downstream turbulence generator produces a rather fine, uniform turbulence, which is particularly advantageous for the suspension flowing immediately into the nozzle chamber.
- the sheet formed then has a uniform, soft formation, as is particularly desired for writing and printing papers.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93911479A EP0592651A1 (de) | 1992-04-25 | 1993-04-20 | Stoffauflaufeinrichtung für eine papiermaschine |
FI935828A FI935828A (fi) | 1992-04-25 | 1993-12-23 | Anordning vid en pappersmaskin foer att mata massa pao en vira |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924213707 DE4213707A1 (de) | 1992-04-25 | 1992-04-25 | Stoffauflaufeinrichtung für eine Papiermaschine |
DEP4213707.1 | 1992-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993022495A1 true WO1993022495A1 (de) | 1993-11-11 |
Family
ID=6457512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/000947 WO1993022495A1 (de) | 1992-04-25 | 1993-04-20 | Stoffauflaufeinrichtung für eine papiermaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0592651A1 (de) |
DE (1) | DE4213707A1 (de) |
FI (1) | FI935828A (de) |
WO (1) | WO1993022495A1 (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0635599A1 (de) * | 1993-07-01 | 1995-01-25 | Valmet Paper Machinery Inc. | Verfahren und Vorrichtung zur Reglung eines Stoffauflaufkasten |
EP0674042A1 (de) * | 1994-03-18 | 1995-09-27 | Voith Sulzer Papiermaschinen GmbH | Dosiervorrichtung für einen Stoffauflauf einer Papiermaschine |
EP0683266A1 (de) * | 1994-05-13 | 1995-11-22 | Voith Sulzer Papiermaschinen GmbH | Stoffauflauf für eine Papiermaschine mit lokaler Zumischung von Fluid |
US5626722A (en) * | 1995-06-01 | 1997-05-06 | Valmet Corporation | Headbox of a paper/board machine |
US5635030A (en) * | 1994-03-15 | 1997-06-03 | Voith Sulzer Papiermaschinen Gmbh | Process and device for guiding a material web |
US5814191A (en) * | 1996-06-20 | 1998-09-29 | Valmet Corp. | Arrangement and method for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine |
US7001488B2 (en) | 2000-10-04 | 2006-02-21 | Sandusky Technologies Limited | Method of and apparatus for distribution of paper stock in paper or board making machinery |
WO2010069652A1 (de) * | 2008-12-18 | 2010-06-24 | Voith Patent Gmbh | Stoffauflauf für eine maschine zur herstellung einer faserstoffbahn |
CN102216521A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于制造纤维材料幅材的机器的流浆箱 |
CN102216520A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于制造纤维材料幅材的机器的流浆箱 |
CN102216523A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于生产纤维材料幅材的机器的流浆箱 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19652442A1 (de) * | 1996-12-17 | 1998-06-18 | Voith Sulzer Papiermasch Gmbh | Verfahren und Vorrichtung zur Verteilung einer Faserstoffsuspension |
FI101726B1 (fi) * | 1997-04-14 | 1998-08-14 | Vaahto Oy | Säätövirtausjärjestelmä (menetelmä ja -laite) paperikoneen perälaatikossa |
IT1315355B1 (it) * | 2000-05-30 | 2003-02-10 | Comer Spa | Metodo per variare la grammatura in una cassa d'afflusso di macchineper la produzione di carta e cassa d'afflusso atta a realizzare tale |
DE10208610B4 (de) * | 2002-02-27 | 2014-03-06 | Voith Patent Gmbh | Verfahren zum Verteilen einer Faserstoffsuspension im Stoffauflauf einer Papier- oder Kartonmaschine und Stoffauflauf |
DE202009010398U1 (de) | 2009-07-31 | 2009-11-05 | Voith Patent Gmbh | Zudosiereinrichtung und Stoffauflauf mit einer Zudosiereinrichtung |
CN103821023A (zh) * | 2014-03-03 | 2014-05-28 | 广东石油化工学院 | 一种互补式布浆器 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1236922B (de) * | 1962-04-12 | 1967-03-16 | Karlstad Mekaniska Ab | Stoffauflauf fuer Papiermaschinen |
US3791918A (en) * | 1972-03-08 | 1974-02-12 | Valmet Oy | Headbox of a paper making machine having multiple, vertically inclined vanes |
DE3514554A1 (de) * | 1984-09-19 | 1986-03-27 | Sulzer-Escher Wyss GmbH, 7980 Ravensburg | Stoffauflauf-vorrichtung fuer eine papiermaschine und verfahren zu deren betrieb |
DE3715554A1 (de) * | 1987-05-09 | 1988-12-01 | Voith Gmbh J M | Anwendung eines verfahrens zum erzielen einer geschwindigkeitsdifferenz eines stoffsuspensionsstrahles sowie papiermaschine zur durchfuehrung des verfahrens |
WO1988009844A1 (en) * | 1987-06-09 | 1988-12-15 | Mercer Peter G | Process for improving the homogeneity of the distribution during production of a fibrous web from a suspension of fibrous materials |
DE3741603A1 (de) * | 1987-12-09 | 1989-06-22 | Voith Gmbh J M | Stoffauflauf fuer eine papiermaschine od.dgl. |
WO1989011561A1 (en) * | 1988-05-17 | 1989-11-30 | J.M. Voith Ag | Headbox for paper-making machines |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4019593C2 (de) * | 1990-06-20 | 1994-01-20 | Voith Gmbh J M | Stoffauflauf für Papiermaschinen |
-
1992
- 1992-04-25 DE DE19924213707 patent/DE4213707A1/de not_active Withdrawn
-
1993
- 1993-04-20 EP EP93911479A patent/EP0592651A1/de not_active Ceased
- 1993-04-20 WO PCT/EP1993/000947 patent/WO1993022495A1/de not_active Application Discontinuation
- 1993-12-23 FI FI935828A patent/FI935828A/fi unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1236922B (de) * | 1962-04-12 | 1967-03-16 | Karlstad Mekaniska Ab | Stoffauflauf fuer Papiermaschinen |
US3791918A (en) * | 1972-03-08 | 1974-02-12 | Valmet Oy | Headbox of a paper making machine having multiple, vertically inclined vanes |
DE3514554A1 (de) * | 1984-09-19 | 1986-03-27 | Sulzer-Escher Wyss GmbH, 7980 Ravensburg | Stoffauflauf-vorrichtung fuer eine papiermaschine und verfahren zu deren betrieb |
DE3715554A1 (de) * | 1987-05-09 | 1988-12-01 | Voith Gmbh J M | Anwendung eines verfahrens zum erzielen einer geschwindigkeitsdifferenz eines stoffsuspensionsstrahles sowie papiermaschine zur durchfuehrung des verfahrens |
WO1988009844A1 (en) * | 1987-06-09 | 1988-12-15 | Mercer Peter G | Process for improving the homogeneity of the distribution during production of a fibrous web from a suspension of fibrous materials |
DE3741603A1 (de) * | 1987-12-09 | 1989-06-22 | Voith Gmbh J M | Stoffauflauf fuer eine papiermaschine od.dgl. |
WO1989011561A1 (en) * | 1988-05-17 | 1989-11-30 | J.M. Voith Ag | Headbox for paper-making machines |
Non-Patent Citations (1)
Title |
---|
PAPIER, DAS. Bd. 40, Nr. 7, Juli 1986, DARMSTADT DE Seiten 313 - 318 D. EGELHOFF 'Der Einfluâ des Stoffauflaufes auf Asymmetriefehler im Papier' * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5688372A (en) * | 1993-07-01 | 1997-11-18 | Valmet Corporation | Method and device in the regulation of a headbox |
EP0635599A1 (de) * | 1993-07-01 | 1995-01-25 | Valmet Paper Machinery Inc. | Verfahren und Vorrichtung zur Reglung eines Stoffauflaufkasten |
US5545293A (en) * | 1993-07-01 | 1996-08-13 | Valmet Corporation | Method and device in the regulation of a headbox |
US5635030A (en) * | 1994-03-15 | 1997-06-03 | Voith Sulzer Papiermaschinen Gmbh | Process and device for guiding a material web |
US5900121A (en) * | 1994-03-18 | 1999-05-04 | Voith Sulzer Papiermaschinen Gmbh | Dosing feeder for the breast box of papermaking machine |
EP0674042A1 (de) * | 1994-03-18 | 1995-09-27 | Voith Sulzer Papiermaschinen GmbH | Dosiervorrichtung für einen Stoffauflauf einer Papiermaschine |
EP0683266A1 (de) * | 1994-05-13 | 1995-11-22 | Voith Sulzer Papiermaschinen GmbH | Stoffauflauf für eine Papiermaschine mit lokaler Zumischung von Fluid |
US5626722A (en) * | 1995-06-01 | 1997-05-06 | Valmet Corporation | Headbox of a paper/board machine |
US5814191A (en) * | 1996-06-20 | 1998-09-29 | Valmet Corp. | Arrangement and method for combining a dilution flow with a stock flow passed out of an inlet header in a paper/board machine |
US7001488B2 (en) | 2000-10-04 | 2006-02-21 | Sandusky Technologies Limited | Method of and apparatus for distribution of paper stock in paper or board making machinery |
WO2010069652A1 (de) * | 2008-12-18 | 2010-06-24 | Voith Patent Gmbh | Stoffauflauf für eine maschine zur herstellung einer faserstoffbahn |
CN102216521A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于制造纤维材料幅材的机器的流浆箱 |
CN102216520A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于制造纤维材料幅材的机器的流浆箱 |
CN102216523A (zh) * | 2008-12-18 | 2011-10-12 | 福伊特专利公司 | 用于生产纤维材料幅材的机器的流浆箱 |
Also Published As
Publication number | Publication date |
---|---|
DE4213707A1 (de) | 1993-10-28 |
FI935828A0 (fi) | 1993-12-23 |
EP0592651A1 (de) | 1994-04-20 |
FI935828A (fi) | 1993-12-23 |
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