EP2882898B1 - Ausschusssystem - Google Patents

Ausschusssystem Download PDF

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Publication number
EP2882898B1
EP2882898B1 EP13750529.3A EP13750529A EP2882898B1 EP 2882898 B1 EP2882898 B1 EP 2882898B1 EP 13750529 A EP13750529 A EP 13750529A EP 2882898 B1 EP2882898 B1 EP 2882898B1
Authority
EP
European Patent Office
Prior art keywords
defibring
fine
recirculation
store
broke system
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.)
Not-in-force
Application number
EP13750529.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2882898A1 (de
Inventor
Günther Kriechbaum
Axel Erzler
Stefan MERK
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
Publication of EP2882898A1 publication Critical patent/EP2882898A1/de
Application granted granted Critical
Publication of EP2882898B1 publication Critical patent/EP2882898B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers

Definitions

  • the invention relates to a reject system for the treatment of rejects of a machine for producing a paper, board, tissue or another fibrous web, wherein the committee in at least one machine pulper, dissolved, the resulting pulp suspension after the machine pulper in at least a template memory is collected and then passed through at least one cleaning device and a plurality of fiberizing devices.
  • Such a machine is used for example in the WO 99/46442 A1 described.
  • machines for producing a fibrous web machine pulpers are usually installed at several points below the machine. These are preferably located after or in front of a process group of the machine, for example. Drying section, coater, calender, etc.
  • the hitherto running fibrous web is passed at full machine speed and web width in the machine pulper, which is arranged in front of this process group.
  • the thereby dissolved into a suspension fibrous web is referred to as a committee.
  • the pulp suspension must be passed through relatively many fiberizers.
  • the object of the invention is therefore to improve the efficiency of the defibration process in the treatment of the rejects.
  • this object is achieved in that the pulp suspension is passed after the cleaning device and at least one subsequent coarse shredding device in at least one recirculation memory, which follows at least one fine-fiberization device and in the at least temporarily at least part of the last fine-fiberization device leaving fibrous suspension is recycled. Since the cleaning and the coarse shredding device are only once passed through by the pulp suspension to be treated, considerable energy savings result. In addition, the coarse shredding device would have a very low efficiency when treating the pulp suspension again. The series-following fine-fiberizing devices allow a targeted Feinzerfaserung with minimal energy expenditure. Furthermore, especially when the fineness of the fiberization is coarsest in the first fine fiberizing device, the possibility of bypassing at least this first fine fiberizing device after the first or second pass of the fiber suspension via a bypass results, which additionally saves energy.
  • one, preferably the last, fine fiberizing device follows a discharge storage and the part of the fiber suspension to be returned to the recirculation storage is separated off before the discharge storage.
  • the entire pulp suspension is returned to the recirculation storage.
  • the pulp suspension may then be passed into the waste storage.
  • the recirculation memory should be followed by a maximum of three fine fiberizing devices.
  • the fineness of the defibration from the first to the last fine fiberizing device should also remain constant or preferably increase. By grading the fineness, the efficiency of defibration can be improved so that fewer passes or fewer fiberizers are required.
  • the division of the pulp suspension stream after the last fine fiberization device should be effected by means of a sorting device. While in this case the largely non-speckle part in the form of the Accepts enters the Ableer storage, the reject is returned to the recirculation storage.
  • the entire pulp suspension leaving the last fine fiberization device is temporarily returned to the recirculation storage. To limit the effort, it is sufficient in most applications that the pulp suspension is returned at most twice in the recirculation memory.
  • the recirculation storage is drained after the last recycling of the pulp suspension.
  • the recirculation storage does not have a mixing device.
  • the reject system according to the invention requires only one recirculation memory.
  • the capacity of the plant can be easily increased by using several, preferably two, recirculation storage tanks, with preferably only one recirculation storage being connected to the following fine fiberization facilities.
  • the other recirculation store may be filled from the original store. This means that the pulp suspension is recycled only in the recirculation storage associated with the fine fiberizer.
  • the pulp suspension is recirculated from one recirculation store to the other recirculation store via the fine fiberizing device.
  • the pulp suspension is then fed to the discharge tank until the corresponding recirculation storage is empty. During this process, the other recirculation memory can be filled from the original memory. This saves a lot of time.
  • FIGS. 1 to 3 show the investment schemes of various, inventive Committee systems.
  • the pulp suspension passes to a cleaning device 2, for example in the form of a hydrocyclone, which removes any impurities present from the pulp suspension.
  • a rough defibration of the pulp suspension takes place in a following coarse fiberizing device 3 with the aim of dissolving the largest specks (fiber bundles). From the coarse-fiberizing device 3, the pulp suspension then passes into one or more recirculation storage 5 without mixing device.
  • FIGS. 1 and 3 shown plant has only one recirculation memory 5. After filling this recirculation memory 5, the leadership of the pulp suspension is carried out by several fine-fiberizing devices 4, which are connected in series one behind the other. Exemplary, the plant at FIG. 1 two and at FIG. 3 three fiberizing devices 4.
  • the coarse and fine fiberizing devices 4 are known machines which differ only with respect to the fineness of the treatment sets.
  • the fineness of the fiberization should remain constant or preferably increase from the first to the last fine fiberizing device 4.
  • the entire, treated pulp suspension returned to the recirculation memory 5. From there, the pulp suspension is then passed through the fine fiberizing devices 4 again. In general, it is sufficient if the pulp suspension is returned at most twice in the recirculation storage 5. Subsequently, the entire pulp suspension is then guided by the last fine-fiberizing device 4 in a discharge storage 6 and continued from there for further treatment or reuse. After emptying the recirculation memory 5 this can be filled again from the original memory 1 from.
  • the rejection system shown has two recirculation memories 5, but only one of which is alternately connected to each of the following three fine shredding devices 4.
  • the recycling of the pulp suspension takes place only in the respective other recirculation storage 5. This means that the pulp suspension until the desired quality between the two Rezirkluations-Speichem 5 on the fine-fiberizing 4 is returned and returned. This way you can It is ensured that each volume fraction of the pulp suspension of a recirculation storage 5 experiences the same number of treatments by the fine fiberization devices 4.
  • FIG. 2 also shows the generally applicable variant that the first fine fiberization device 4 is bypassed via a bypass 8 after the first or second pass of the pulp suspension. This saves energy and is particularly advantageous when the fineness of the fiberization in the first fine fiberizing device 4 is lower than the following.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP13750529.3A 2012-08-10 2013-08-05 Ausschusssystem Not-in-force EP2882898B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012214236.3A DE102012214236A1 (de) 2012-08-10 2012-08-10 Ausschusssystem
PCT/EP2013/066390 WO2014023692A1 (de) 2012-08-10 2013-08-05 Ausschusssystem

Publications (2)

Publication Number Publication Date
EP2882898A1 EP2882898A1 (de) 2015-06-17
EP2882898B1 true EP2882898B1 (de) 2016-06-01

Family

ID=49000456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13750529.3A Not-in-force EP2882898B1 (de) 2012-08-10 2013-08-05 Ausschusssystem

Country Status (4)

Country Link
EP (1) EP2882898B1 (zh)
CN (1) CN104662226B (zh)
DE (1) DE102012214236A1 (zh)
WO (1) WO2014023692A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436408B (zh) * 2016-11-30 2019-02-12 芬欧汇川(中国)有限公司 损纸处理系统以及利用该系统防止后段损纸槽溢流的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9212867D0 (en) * 1992-06-17 1992-07-29 Wiggins Teape Group Ltd Recovery and re-use of raw materials from paper mill waste sludge
FI108304B (fi) * 1998-03-12 2001-12-31 Andritz Ahlstrom Oy Menetelmä ja laitteisto mineraalipitoisen kuitususpension kuten päällystetyn hylyn käsittelyyn paperin valmistuksessa
JP4943874B2 (ja) * 2007-01-28 2012-05-30 株式会社シード 古紙再生装置の抄紙装置
CN101748644A (zh) * 2008-12-02 2010-06-23 福建省晋江优兰发纸业有限公司 彩色薄页纸生产工艺
CN101666053B (zh) * 2009-09-11 2011-07-20 华南理工大学 一种化机浆生产方法
CN102605664A (zh) * 2011-01-20 2012-07-25 侯俊民 一种环保造纸工艺及设备
CN202181482U (zh) * 2011-08-09 2012-04-04 江苏五洲纸业有限公司 新型双胶文化纸生产装置

Also Published As

Publication number Publication date
WO2014023692A1 (de) 2014-02-13
EP2882898A1 (de) 2015-06-17
DE102012214236A1 (de) 2014-02-13
CN104662226B (zh) 2017-08-11
CN104662226A (zh) 2015-05-27

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