EP1262595A1 - Procédé et système d'alimentation d'une caisse de tête multicouche - Google Patents
Procédé et système d'alimentation d'une caisse de tête multicouche Download PDFInfo
- Publication number
- EP1262595A1 EP1262595A1 EP02005436A EP02005436A EP1262595A1 EP 1262595 A1 EP1262595 A1 EP 1262595A1 EP 02005436 A EP02005436 A EP 02005436A EP 02005436 A EP02005436 A EP 02005436A EP 1262595 A1 EP1262595 A1 EP 1262595A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- white water
- pump
- thick matter
- feed system
- partial
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 6
- 230000001914 calming effect Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 33
- 239000002994 raw material Substances 0.000 description 2
- 238000004380 ashing Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
- D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
Definitions
- the invention relates to a method and a material feed system for Loading a multi-layer headbox in a paper machine.
- the aim of the invention is to provide an improved method and an improved To create device of the type mentioned, in which the said Disadvantages are eliminated. At the same time, in particular higher efficiency and higher security can be achieved.
- This object is achieved by a method for loading a Multilayer headbox of a paper machine, in which by means of a Pump white water is introduced, then the white water flow in several whitewater streams is divided, this after the common Pump obtained whitewater streams of thick matter is added and the partial streams then in particular over the respective layers assigned distributors are fed to the multi-layer headbox.
- EP 0 651 092 A1 EP 0 745 721 A1 and WO 98/17860
- material feed systems for multi-layer headboxes are known, at from which the substance is taken from a common container and then is divided into partial flows. The different sub-flows however, separate mixing pumps are assigned.
- a controllable pump is preferably used as the common pump, to control the volume flow in question, for example.
- At least one can be used to divide the white water stream Pipe fans are used.
- the flow rates are preferred of the partial flows measured and adjusted by means of assigned control valves or regulated.
- the mixing of the respective thick matter and white water flows can for example, in the usual way (see, for example DE 196 32 673 A1), with the exception that according to the invention Thick matter is added after the common pump.
- the admixture of thick matter can, for example, by one to one Elbow made against the direction of the white water flow Thick matter injection.
- Thick matter directly in front of a respective pressure sorter.
- the admixture of thick matter can at least in the area a mixed barrier.
- the partial streams are then connected to the distributor a guide device assigned to the respective layer of the multilayer headbox, the at least one turbulence block includes.
- a calming chamber can also be preferred be arranged between two turbulence blocks.
- the default pressure for the pump is preferably chosen so is that, in particular with minimal energy expenditure, the target pressures in the headbox nozzle spaces are reached, the flow rate a partial flow over the pressure in the nozzle area of the concerned Layer is regulated and the flow velocities of the others Partial flows via a pressure difference measurement between the layers in the nozzle of the multi-layer headbox.
- the stock feed system according to the invention comprises means for the subsequent Splitting the white water flow into several white water partial flows, Means to stream this white water obtained after the common pump Mix thick matter, and means to then the partial streams in particular via distributors assigned to the respective layers to feed the multilayer headbox.
- Figure 1 shows a schematic representation of a stock feed system 10 for Loading a multi-layer headbox 12, here for example one Three-layer headbox, a paper machine.
- the white water stream 18 is divided into several white water partial streams 18a to 18c divided. This received after the common pump 14 White water partial flows 18a to 18c become thick matter flows 22a to 22c admixed. The thick matter and white water partial streams 18a 'to 18c' are then assigned in particular above the respective layers Distributors 26a to 26c fed to the multi-layer headbox 12.
- the white water stream 18 in a number of white water partial flows corresponding to the number of layers 18a to 18c, here e.g. in three such white water partial flows, divided up.
- a controllable pump can be used as the common pump 14 to, for example, the volume flow accordingly regulate.
- At least one tube fan can be used to divide the white water stream 18 20 or the like can be used.
- the flow rates of the partial flows 18a 'to 18b' are via corresponding measuring devices 28a to 28c measured and by means of provided in the respective lines Control valves 30a to 30b set or controlled.
- the partial streams 18a 'to 18c' can after admixing thick matter 22a to 22c are mixed in pressure sorters 32a to 32c.
- Figure 2 shows a schematic representation of an example of the admixing of thick matter, which here by a on a manifold 34 against the Thick matter injection takes place in the direction of the white water flow.
- Figure 3 shows a schematic illustration of an example of the admixing of thick matter 22a (22b, 22c) before a sudden cross-sectional expansion 36 of the line concerned.
- Figure 4 shows a schematic illustration of an example of the admixing of thick matter 22a (22b, 22c) directly in front of a respective pressure sorter 32a (32b, 32c).
- Figure 5 shows a schematic illustration of an example of the admixing of thick matter 22a (22b, 22c) on mixed barriers 38.
- FIG. 6 shows a further embodiment in a schematic representation of the multi-layer headbox 12, the turbulence inserts for improvement the mixing and to optimize the pressure conditions are additionally equipped with calming chambers 40a to 40c.
- the calming chambers 40a to 40c are each between two turbulence blocks 42a, 42a 'to 42c, 42c' are arranged.
Landscapes
- Paper (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001126346 DE10126346A1 (de) | 2001-05-30 | 2001-05-30 | Verfahren und Stoffzuführsystem zum Beschicken eines Mehrschichtstoffauflaufs |
| DE10126346 | 2001-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1262595A1 true EP1262595A1 (fr) | 2002-12-04 |
Family
ID=7686652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02005436A Withdrawn EP1262595A1 (fr) | 2001-05-30 | 2002-03-08 | Procédé et système d'alimentation d'une caisse de tête multicouche |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1262595A1 (fr) |
| DE (1) | DE10126346A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007038772A1 (de) | 2007-08-16 | 2009-02-19 | Zf Friedrichshafen Ag | Verfahren zur Durchführung einer Schaltung im Hybridbetrieb bei einem parallelen Hybridfahrzeug |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1543975A (en) * | 1975-05-05 | 1979-04-11 | Beloit Corp | Method and apparatus for delivering separate streams of liquid containing fibres for use in forming a multiply web |
| WO1998017860A1 (fr) * | 1996-10-18 | 1998-04-30 | Valmet Corporation | Systeme d'alimentation en pate pour caisse de tete multicouche et procede de fonctionnement d'une caisse de tete multicouche |
| WO2000026467A1 (fr) * | 1998-10-29 | 2000-05-11 | Metso Paper, Inc. | Formation d'une bande multicouches au moyen d'un systeme simple de stock de base |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT376251B (de) * | 1980-12-19 | 1984-10-25 | Escher Wyss Gmbh | Einrichtung zur beschickung eines mehrlagen-stoffauflaufes fuer papiermaschinen |
| FI92729C (fi) * | 1993-10-29 | 1994-12-27 | Valmet Paper Machinery Inc | Monikerrosperälaatikon massansyöttöjärjestelmä ja menetelmä monikerrosperälaatikkokäytössä |
| US6210535B1 (en) * | 1995-06-01 | 2001-04-03 | Valmet Corporation | Stock feed system for a multi-layer headbox and method in the operation of a multi-layer headbox |
| DE19632673A1 (de) * | 1996-08-14 | 1998-02-19 | Voith Sulzer Papiermasch Gmbh | Stoffauflauf und Verfahren zur Verteilung einer Faserstoffsuspension im Stoffauflauf einer Papiermaschine |
-
2001
- 2001-05-30 DE DE2001126346 patent/DE10126346A1/de not_active Withdrawn
-
2002
- 2002-03-08 EP EP02005436A patent/EP1262595A1/fr not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1543975A (en) * | 1975-05-05 | 1979-04-11 | Beloit Corp | Method and apparatus for delivering separate streams of liquid containing fibres for use in forming a multiply web |
| WO1998017860A1 (fr) * | 1996-10-18 | 1998-04-30 | Valmet Corporation | Systeme d'alimentation en pate pour caisse de tete multicouche et procede de fonctionnement d'une caisse de tete multicouche |
| WO2000026467A1 (fr) * | 1998-10-29 | 2000-05-11 | Metso Paper, Inc. | Formation d'une bande multicouches au moyen d'un systeme simple de stock de base |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10126346A1 (de) | 2002-12-05 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| AK | Designated contracting states |
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| 17P | Request for examination filed |
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| AKX | Designation fees paid |
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| GRAP | Despatch of communication of intention to grant a patent |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PATENT GMBH |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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| 18W | Application withdrawn |
Effective date: 20060914 |