EP2882898A1 - Ausschusssystem - Google Patents
AusschusssystemInfo
- Publication number
- EP2882898A1 EP2882898A1 EP13750529.3A EP13750529A EP2882898A1 EP 2882898 A1 EP2882898 A1 EP 2882898A1 EP 13750529 A EP13750529 A EP 13750529A EP 2882898 A1 EP2882898 A1 EP 2882898A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recirculation
- fine
- memory
- fiberization
- pulp suspension
- 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 56
- 238000011282 treatment Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- 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 broke system for the treatment of rejects of a machine for producing a paper, board, tissue or another fibrous web, wherein the broke dissolved in at least one machine pulper, the pulp suspension thereby produced after the machine pulper in at least one Template storage is collected and then passed through at least one cleaning device and several fiberizing devices.
- 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 pulp suspension must be passed through relatively many fiberizers.
- the number of serially connected shredders is limited because each shredder generates an increase in pressure which could lead to mechanical failure of a fourth or fifth shredder.
- 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 Zerfaserungsvoriques in at least one recirculation memory, which follows at least one fine-fiberization device and in the at least temporarily at least a portion of the last fine-fiberization device leaving fibrous suspension is recycled.
- the cleaning and the coarse shredding device are only once passed through by the pulp suspension to be treated, considerable energy savings result.
- 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, in particular, when the fineness of the defibration in the first fine-fiberization device is coarsest, the possibility of bypassing at least this first fine-fiberization device after the first or second pass of the fiber suspension via a bypass, which additionally saves energy.
- the entire pulp suspension is returned to the recirculation storage. After passing through the required number of fine fiberizing devices, the pulp suspension can then be passed to the discharge storage. To limit the effort but also the pressure build-up, 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 remain constant or preferably increase.
- the efficiency of defibration can be improved so that fewer passes or fewer fiberizers are required.
- the division of the pulp suspension stream should be made after the last fine-fiberization by means of a sorter.
- 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.
- 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 storage.
- the capacity of the plant can be easily increased by using several, preferably two, recirculation storage tanks, preferably with only one recirculation storage tank connected to the following fine fiberization equipment.
- the other recirculation store may be filled from the original store. This means that the pulp suspension is recycled only in the recirculation storage connected to 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 dump tank until the corresponding recirculation tank 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 layout diagrams of various rejection systems according to the invention.
- the process groups formers, press, coater and winder are each assigned a machine pulper.
- 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 cleaning device 2 for example in the form of a hydrocyclone, which removes any impurities present from the pulp suspension.
- the pulp suspension then passes into one or more recirculation storage 5 without mixing device.
- the system shown in Figures 1 and 3 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.
- the plant has two shredding devices 4 in FIG. 1 and three shredding devices 4 in FIG.
- 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 defibration should remain constant or preferably increase from the first to the last fine fiberizing device 4.
- the entire, treated pulp suspension is returned to the recirculation storage 5 until the required quality of the pulp suspension of FIG. 1 is reached. From there, the pulp suspension is then passed through the fine fiberizing devices 4 again.
- 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-fiberization 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.
- a sorting device 7 in the form of a fractionator or pressure sorter is arranged between the last fine fiberizing device 4 and the discharge storage 6. That, the sieve o.ä.
- the sorting device 7 passing Accept enters the Ableer storage 6, while the reject rejected on the sieve to the recirculation memory 5 is returned. In this way, only the part of the pulp suspension is returned to the recirculation store 5 and re-treated in the fine fiberizer 4, which is not yet speck-free.
- the additional expenditure by the sorting device 7 is more than compensated by the very large energy savings.
- the reject system shown in FIG. 2 has two recirculation stores 5, but only one of each is alternately connected to 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-stores 5 on the fine-fiberizing 4 is returned and returned. This way you can ensure that each volume fraction of the pulp suspension of a recirculation memory 5 undergoes the same number of treatments by the Fein-Fasfaservorvorricht 4. If the treatment of the pulp suspension in the fine-fiberization devices 4 is completed, we will pass them to the discharge storage 6 until the respective recirculation storage 5 is empty. During this, the other, empty recirculation storage 5 is filled with fibrous suspension to be treated from the original storage 1.
- FIG. 2 also shows the generally applicable variant that the first fine fiberizing 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 in the following.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
Description
Claims
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 true EP2882898A1 (de) | 2015-06-17 |
| EP2882898B1 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 (de) |
| CN (1) | CN104662226B (de) |
| DE (1) | DE102012214236A1 (de) |
| WO (1) | WO2014023692A1 (de) |
Families Citing this family (1)
| 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)
| 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 |
-
2012
- 2012-08-10 DE DE102012214236.3A patent/DE102012214236A1/de not_active Withdrawn
-
2013
- 2013-08-05 EP EP13750529.3A patent/EP2882898B1/de not_active Not-in-force
- 2013-08-05 CN CN201380042183.7A patent/CN104662226B/zh not_active Expired - Fee Related
- 2013-08-05 WO PCT/EP2013/066390 patent/WO2014023692A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014023692A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012214236A1 (de) | 2014-02-13 |
| CN104662226A (zh) | 2015-05-27 |
| CN104662226B (zh) | 2017-08-11 |
| WO2014023692A1 (de) | 2014-02-13 |
| EP2882898B1 (de) | 2016-06-01 |
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