WO2012123529A1 - Procédé et dispositif pour régler la capacité filtrante d'un dispositif de filtration - Google Patents

Procédé et dispositif pour régler la capacité filtrante d'un dispositif de filtration Download PDF

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Publication number
WO2012123529A1
WO2012123529A1 PCT/EP2012/054528 EP2012054528W WO2012123529A1 WO 2012123529 A1 WO2012123529 A1 WO 2012123529A1 EP 2012054528 W EP2012054528 W EP 2012054528W WO 2012123529 A1 WO2012123529 A1 WO 2012123529A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
suspension
filtrate
fibers
filtering
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
Application number
PCT/EP2012/054528
Other languages
German (de)
English (en)
Inventor
Herbert Britz
Christian Naydowski
Jens Haag
Martin Staiger
Jonas BERSTRÖM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to CN2012800134096A priority Critical patent/CN103429816A/zh
Publication of WO2012123529A1 publication Critical patent/WO2012123529A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D21D5/02—Straining or screening the pulp
    • 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
    • D21D5/02—Straining or screening the pulp
    • D21D5/04—Flat screens
    • D21D5/046—Rotary screens
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0018—Paper-making control systems controlling the stock preparation

Definitions

  • the invention relates to a method and a device for controlling or regulating the filter performance of a filter device, in particular a filter device in the stock preparation circuit of a papermaking machine.
  • the water used be the water quality required for the various processes.
  • the water required for the process in the machine or plant is repeatedly cleaned and returned to the process at various points.
  • paper fiber suspensions contain not only the actual paper fibers but also a more or less large amount of fine solids.
  • fine solids can be mineral fillers that are usually needed for paper production. They are usually called "ashes", because the mineral substances are non-combustible, but they can also be fiber fragments, which are produced, for example, during the grinding of the fibers, which are also called fines paper or cardboard produced from the pulp suspension.
  • dewatering of the fibrous web entails large quantities of suspension, in particular white water or "white water.”
  • This "white water” is a suspension with fractions of fibers and ash passing through with the water the stitches of the forming fabric have passed.
  • the resulting filtrate is used to e.g. dilute the paper pulp suspension so that the foreign matter contained in the filtrate after filtering, especially the ash content, is not lost.
  • the object of the invention is to provide a method and a device with which the filter performance of a filter device, in particular a filter device in the stock preparation cycle of a papermaking machine, can be improved.
  • the object is achieved by means of a method having the features of claim 1 and the device according to claim 1 1.
  • a method of the aforementioned type comprising the following steps: introducing a suspension laden with fibers and fine solids into the filter device,
  • filter aids By adding filter aids to the suspension, e.g. into the "white water”, it is achieved that the filter effect can be influenced or regulated by influencing the filter aid layer, which indeed consists of fibers and fines that are filtered out of the suspension.
  • the filtering of the suspension takes place in a disc filter.
  • a disc filter one or more disc bodies rotate with filter surfaces on a shaft which is constructed such that through them the filtrate can be removed that passes through the filter surfaces into the interior of the disc body.
  • the filtrate is divided into different filtrate qualities by means of a valve, preferably into a first filtrate, a clear filtrate and a super clear filtrate.
  • the filtrates differ due to their different filtering.
  • the Disk bodies are only partially immersed in the suspension so that as the disk body rotates about the disk axis the filter surface is dipped into the suspension in segments and the filter aid layer is slowly built up by filtering out fiber material on the filter surface. The thicker the filter aid layer becomes, the greater the filtering effect becomes.
  • the first filtrate is thus removed in a first segment region, the clear filtrate in a second region, and the superclear filtrate in a third region.
  • the first filtrate removed from the first region is preferably returned to the suspension at the filter inlet.
  • Various measurement methods can be used for the measurement of the ingredients or the characteristic, such as the measurement of the total solids content, the turbidity, the ash content, the light scattering, the fiber content and / or the fiber length distribution of the filtrate.
  • the filter aid which forms the filter aid layer together with the constituents contained in the suspension, can be taken from a process cycle in the papermaking plant and / or additionally added to the stock preparation cycle.
  • the filter aid preferably consists of a fibrous material, in particular low-ash fibrous material, furthermore preferably long-fiber pulp.
  • the filter aid is removed from the paper suspension mixing device, in particular at a location immediately adjacent to the fresh fiber feed.
  • the device according to the invention is characterized in that a measuring device for measuring ingredients or characteristics of the filtrate is present and the ingredients or parameters by means of a controlled or controlled addition of a filter aid, in the suspension at the filter inlet, controllable or regulated.
  • the filter device for filtering the suspension comprises a disc filter and a valve in which the filtrate can be divided into different filtrate qualities.
  • the inflow of the filter aid e.g. can be controlled or regulated via a valve.
  • the filter body 2 are hollow inside and have filter surfaces 2a on both sides.
  • the shaft 17 is driven so that the filter surfaces 2a pass through the suspension 16 in segments.
  • a filter auxiliary layer 18 forms when the suspension 16 flows through the filter surface 2a.
  • the filter auxiliary layer 18 becomes thicker the longer the filter surface 2 a is flowed through by the suspension 16.
  • the primary purpose of the filter aid layer 18 is to filter out the valuable and reusable fine solids and mineral fillers as well as the fiber from the suspension 16 so that the filter aid 18 and filtrate can be reused in the papermaking process.
  • the filter aid layer 18 is removed from the filter surface in a segment area outside the suspension 16 and supplied to the recycling (not shown in more detail since the prior art).
  • the filtrate is separated by means of a Filtratventils 4 into three different filter stages, as already described, so that the filter device, a first filtrate 6, a Clear filtrate 7 and a super clear filtrate 8 can be taken.
  • the filtrate 6a still contains too much impurities and is preferably fed back into the suspension 16, or pumped, just like the proportion of the suspension, which must be removed via an overflow at too high level of the disc filter from this.
  • the clear filtrate 7 is recycled or pumped to a process in the paper machine, e.g. to be used as splashing, the quality or the foreign matter content in clear filtrate 7 is measured or monitored.
  • the measured values are fed to a control and regulating device 15. This regulates, according to the rule, the supply of the filter aid 19, which is removed from the paper suspension mixing device 12.
  • the paper suspension necessary for paper production from different proportions such as virgin fibers, dilution water, etc.
  • the removal point is arranged as close as possible to the fresh-fiber inflow.
  • the quantity flow of fresh fibers / filter aid 19 into the suspension is regulated via the valve 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé pour commander ou régler la capacité filtrante d'un dispositif de filtration, en particulier un dispositif de filtration dans le circuit de préparation de matière d'une installation de fabrication de papier, le procédé comprenant les étapes suivantes : introduire une suspension (16) chargée de fibres et de fines matières solides dans le dispositif de filtration, - filtrer la suspension (16), cette dernière (16) étant guidée à travers la surface filtrante (2a) du dispositif de filtration sur laquelle est formée, pour augmenter la capacité filtrante, une couche auxiliaire de filtration (18) qui est constituée de fibres et de fines matières qui ont été filtrées de la suspension (16), - détacher la couche auxiliaire de filtration (18) de la surface filtrante (2a) en dehors de la suspension (16), - évacuer le filtrat (6, 7, 8) pour l'utiliser ultérieurement dans la machine à papier, un ingrédient ou une grandeur caractéristique du filtrat (6, 7, 8) étant mesurée et la capacité filtrante étant commandée ou réglée par ajout d'une substance auxiliaire de filtration (19) dans la suspension (16) à l'entrée du filtre.
PCT/EP2012/054528 2011-03-16 2012-03-15 Procédé et dispositif pour régler la capacité filtrante d'un dispositif de filtration Ceased WO2012123529A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012800134096A CN103429816A (zh) 2011-03-16 2012-03-15 用于调节过滤器设备的过滤性能的方法和设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110005650 DE102011005650A1 (de) 2011-03-16 2011-03-16 Verfahren zur Regelung der Filterleistung einer Filtervorrichtung
DE102011005650.5 2011-03-16

Publications (1)

Publication Number Publication Date
WO2012123529A1 true WO2012123529A1 (fr) 2012-09-20

Family

ID=45872942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/054528 Ceased WO2012123529A1 (fr) 2011-03-16 2012-03-15 Procédé et dispositif pour régler la capacité filtrante d'un dispositif de filtration

Country Status (3)

Country Link
CN (1) CN103429816A (fr)
DE (1) DE102011005650A1 (fr)
WO (1) WO2012123529A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114288753A (zh) * 2022-01-13 2022-04-08 江苏金玉丰新材料有限公司 一种基于纤维素助滤剂的非均相混合物的分离方法及装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016125303B4 (de) 2016-12-22 2018-12-27 Voith Patent Gmbh Anlage zur Prozesswasserbehandlung
DE102018113804A1 (de) * 2018-06-11 2019-12-12 Voith Patent Gmbh Scheibenfilter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813448B1 (de) 1978-03-29 1978-09-21 Voith Gmbh J M Verfahren und Anlage zur Wiederaufbereitung von Altpapier
DE3829177A1 (de) * 1987-09-16 1989-03-30 Kufferath Andreas Gmbh Scheibeneindicker
DE4242338A1 (fr) * 1991-12-16 1993-06-17 Ahlstroem Oy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813448B1 (de) 1978-03-29 1978-09-21 Voith Gmbh J M Verfahren und Anlage zur Wiederaufbereitung von Altpapier
DE3829177A1 (de) * 1987-09-16 1989-03-30 Kufferath Andreas Gmbh Scheibeneindicker
DE4242338A1 (fr) * 1991-12-16 1993-06-17 Ahlstroem Oy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114288753A (zh) * 2022-01-13 2022-04-08 江苏金玉丰新材料有限公司 一种基于纤维素助滤剂的非均相混合物的分离方法及装置

Also Published As

Publication number Publication date
CN103429816A (zh) 2013-12-04
DE102011005650A1 (de) 2012-09-20

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