EP3004456A1 - Konstantteil-mischvorrichtung - Google Patents
Konstantteil-mischvorrichtungInfo
- Publication number
- EP3004456A1 EP3004456A1 EP14724097.2A EP14724097A EP3004456A1 EP 3004456 A1 EP3004456 A1 EP 3004456A1 EP 14724097 A EP14724097 A EP 14724097A EP 3004456 A1 EP3004456 A1 EP 3004456A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suspension
- mixing
- nozzle
- dilution
- mixing device
- 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.)
- Granted
Links
- 239000000725 suspension Substances 0.000 claims abstract description 62
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000000356 contaminant Substances 0.000 claims abstract 2
- 238000010790 dilution Methods 0.000 claims description 33
- 239000012895 dilution Substances 0.000 claims description 33
- 238000007872 degassing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007865 diluting Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 abstract 4
- 239000012530 fluid Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- 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
- D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
-
- 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
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
- D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
-
- 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
- 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
Definitions
- the invention relates to a mixing device for diluting a, suitable for the production of a paper, board, tissue or another fibrous web pulp suspension with a dilution liquid, which is arranged after a cleaning device for the removal of impurities from the pulp suspension.
- the highly consistent pulp suspension formed essentially of processed fibers and fillers is diluted with the white water collected in the paper machine and then fed to the headbox.
- the white water originating in particular from the former of the paper machine contains a relatively high proportion of gas. In order not to interfere with the process of manufacturing the fibrous web and its quality, therefore, a degassing is often required.
- the consistency of the pulp suspension to be cleaned should be as high as possible. Therefore, a re-dilution is often necessary.
- the redilution takes place via a mixing device that is part of a white water collection container. From there, the pulp suspension must then be conveyed via a pump to the degassing device.
- the object of the invention is therefore to allow a simple and comprehensive mixing in the dilution.
- the object is achieved in that the purified pulp suspension via at least one suspension nozzle in a Mixing vessel is guided with an outlet, in which the dilution liquid is passed through at least one dilution nozzle.
- the mixing container can be positioned very close to the cleaning device, resulting in a very compact arrangement.
- the mixing container can simultaneously serve as a transport space for the diluted pulp suspension to form a following unit. In extreme cases, the mixing space itself is formed by a connecting line.
- the cleaning device should be formed by a plurality of, preferably parallel, hydrocyclones.
- Hydrocyclones are well suited to concentrate by centrifugal forces heavy parts and light parts in pulp suspensions and to discharge via the outlet or the separator.
- the mixing container has an elongated shape and is preferably cylindrical, with one end forming the outlet of the mixing device.
- the purified pulp suspension of each hydrocyclone can be guided over a, preferably separate suspension nozzle in the mixing container.
- the pulp suspension flows in the mixing container in the direction of outlet, it is advantageous for a gradual supply of purified pulp suspension, when the suspension nozzles are arranged side by side in the longitudinal extension of the mixing container.
- the injected fluids bounce on a boundary wall of the mixing chamber and are additionally sprayed, which additionally promotes mixing and degassing, the suspension nozzles and / or the dilution nozzles should be placed at the bottom of the mixing vessel or on a side surface of the mixing vessel and to the center or after be aligned above.
- each suspension nozzle is associated with a dilution nozzle.
- the dilution nozzle associated with a suspension nozzle can follow the outlet or else the dilution nozzle assigned to a suspension nozzle can be arranged such that the jets of both nozzles meet, which provides additional turbulence.
- the diluted pulp suspension should be fed from the outlet of the mixing container as directly as possible in a degassing.
- the dilution liquid should at least essentially be formed by white water.
- the pulp suspension is then advantageously conveyed by a headbox pump to the headbox of the machine.
- a headbox pump to the headbox of the machine.
- FIG. 1 a plant scheme
- FIG. 2 a cleaner stage with dilution nozzles 12,
- Figure 4 several cleaner stages with dilution nozzles 12 and the following
- FIG. 5 shows a cross section through another mixing container 14.
- the pulp suspension 1 is injected at high pressure into a white water collecting container 10 and prediluted by the mixing with the white water 3.
- the prediluted pulp suspension 1 is conveyed by means of suspension pump 7 to a cleaning device, which is formed by a plurality of hydrocyclones 4.
- a plurality of hydrocyclones 4 connected in parallel are combined to form a compact cleaner stage.
- the hydrocyclones 4 described here are used to clean a pulp suspension 1 with a consistency between 2 and 3% of heavy parts. Because of the high consistency, the cleaning device can be made smaller.
- the fixed housing of the hydrocyclone 4 encloses an elongated chamber with a circular cross-section.
- At one end of the chamber is an inlet through which the pulp suspension 1 to be cleaned is injected tangentially at a pressure of up to 4 or even 6 bar into a cylindrical inlet section of the chamber.
- the pulp suspension 1 is brought to a circular path, wherein the pulp suspension 1 is pressed against the wall of the chamber.
- centrifugal and centrifugal forces accumulate the heavy parts on the wall of the chamber and the light parts in the middle of the chamber.
- the heavy parts reach the wall of the chamber spirally to the opposite, here the lower end of the chamber with the Schwerteil- separator, through which the heavy parts are removed from the hydrocyclone 4.
- dilution liquid is passed into the chamber in the region of the heavy-part separator via a feed line.
- the existing in the middle of the chamber, purified from the heavy parts pulp suspension 1 is discharged as a lightweight component on the light-part drain.
- the thus purified pulp suspension 1 passes immediately after the cleaning device in a further mixing device 6.
- This mixing device 6 is essentially formed by a cylindrical mixing container 14, in which via suspension nozzles 1 1, the purified pulp suspension 1 is introduced.
- dilution liquid 3 from the white water collecting container 10 is also injected into the mixing container 14 via a plurality of dilution nozzles 12.
- the white water is conveyed by a dilution pump 8 from the white water collecting container 10 to the further mixing device 6.
- the purified pulp suspension 1 of the hydrocyclones 4 is injected separately and on the other hand each suspension nozzle 1 1 assigned a dilution nozzle 12.
- the suspension nozzles 1 1 and the Dilution nozzles 12 are arranged on opposite side walls of the mixing container 14. This results in that the jets of the suspension nozzles 1 1 each coincide with the beam of the associated dilution nozzle 12. The turbulence emanating from the meeting leads to an intensive mixing.
- the pulp suspension 1 according to FIG. 4 passes without additional pump from the after-dilution via the outlet 13 of the mixing tank 14 directly to a degassing device 5.
- the degassing device 5 the degassing takes place in a known manner by the connection with a vacuum source 15.
- the thus degassed pulp suspension 1 is then transported by headbox pump 9 to the headbox of the paper machine.
- the invention thus also enables a simple retrofitting of existing systems with a re-dilution.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013209998.3A DE102013209998A1 (de) | 2013-05-29 | 2013-05-29 | Konstantteil-Mischvorrichtung |
| PCT/EP2014/060053 WO2014191227A1 (de) | 2013-05-29 | 2014-05-16 | Konstantteil-mischvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3004456A1 true EP3004456A1 (de) | 2016-04-13 |
| EP3004456B1 EP3004456B1 (de) | 2017-02-01 |
Family
ID=50625754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14724097.2A Not-in-force EP3004456B1 (de) | 2013-05-29 | 2014-05-16 | Konstantteil-vorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3004456B1 (de) |
| CN (1) | CN105247134B (de) |
| DE (1) | DE102013209998A1 (de) |
| WO (1) | WO2014191227A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020110467A1 (de) | 2020-04-17 | 2021-10-21 | Voith Patent Gmbh | Hydrozyklon-Anlage |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146469A (en) * | 1977-10-11 | 1979-03-27 | Clark & Vicario Corporation | Mounting of cleaners in papermaking system |
| US6117272A (en) * | 1998-09-03 | 2000-09-12 | Voith Sulzer Papiermaschinen | Device and process for metering auxiliary materials into the flow box of a paper machine |
| FI115540B (fi) * | 2000-12-29 | 2005-05-31 | Metso Paper Inc | Laitteisto massan johtamisessa paperikoneen tai vastaavan perälaatikkoon |
| AT414244B (de) * | 2004-05-13 | 2006-10-15 | Andritz Ag Maschf | Verfahren und vorrichtung zur vermischung von stoffströmen |
| DE102004042341B4 (de) * | 2004-09-01 | 2007-04-12 | Voith Patent Gmbh | System und Verfahren zur Zuführung einer Faserstoffsuspension zu einem Stoffauflauf |
| DE102008054897A1 (de) * | 2008-12-18 | 2010-07-01 | Voith Patent Gmbh | Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn |
| DE102010038694A1 (de) * | 2010-07-30 | 2012-02-02 | Voith Patent Gmbh | Konstantteil |
-
2013
- 2013-05-29 DE DE102013209998.3A patent/DE102013209998A1/de not_active Withdrawn
-
2014
- 2014-05-16 CN CN201480030552.5A patent/CN105247134B/zh not_active Expired - Fee Related
- 2014-05-16 WO PCT/EP2014/060053 patent/WO2014191227A1/de not_active Ceased
- 2014-05-16 EP EP14724097.2A patent/EP3004456B1/de not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013209998A1 (de) | 2014-05-22 |
| EP3004456B1 (de) | 2017-02-01 |
| WO2014191227A1 (de) | 2014-12-04 |
| CN105247134B (zh) | 2018-01-12 |
| CN105247134A (zh) | 2016-01-13 |
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