WO2001036738A1 - Deinkingware - Google Patents
Deinkingware Download PDFInfo
- Publication number
- WO2001036738A1 WO2001036738A1 PCT/DE2000/003931 DE0003931W WO0136738A1 WO 2001036738 A1 WO2001036738 A1 WO 2001036738A1 DE 0003931 W DE0003931 W DE 0003931W WO 0136738 A1 WO0136738 A1 WO 0136738A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paper
- deinking
- grain size
- approximately
- cardboard
- Prior art date
Links
Classifications
-
- 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
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/026—Separating fibrous materials from waste
- D21B1/028—Separating fibrous materials from waste by dry methods
Definitions
- the invention relates to deinking goods according to the preamble of claim 1 with a portion of newspapers, a portion of magazines and a portion of contaminants.
- the deinking goods serve, among other things, as a raw material for newsprint and high-quality graphic papers and are generally dissolved in a pulper or processed into a fiber suspension (pulp).
- the time spent in a pulper to dissolve common deinking goods can be up to 20 minutes.
- the pulp is pumped out via coarse sieves and fed to a cleaning facility to remove undesired constituents which would be introduced during the manufacture, use or consumption of paper or the processing of the resulting waste paper or which would impair the quality of the new paper.
- the undesirable constituents include, among other things, coating material from milk carton, foils, staples, iron splinters from the wear and tear of processing machines, polystyrene from packaging materials and printing materials.
- the cleaning includes sieve,
- washing and flotation treatments includes several sieving stages, e.g. a fiberizer with which sieving takes place at around 7 to 8 mm, fine sieves with sieve opening diameters of around 1, 4 and 2.6 mm and hydrocyclones.
- sieving stages e.g. a fiberizer with which sieving takes place at around 7 to 8 mm, fine sieves with sieve opening diameters of around 1, 4 and 2.6 mm and hydrocyclones.
- Deinkingware (types D 31 and D 39) is generally sorted by sorting waste paper, which can also result in a fraction of mixed waste paper (type B 12) and a fraction of department store paper (type B 1 9),
- Known deinking goods consist largely of uncrushed newspapers and magazines and generally have at least 60% newspapers as well as a total amount of pollutants, including sand, glass, staples, cardboard, cardboard, of around 3% and weighing of individual sorted components also takes place according to the INGEDE method, in which a sample is spread out on an observation surface and individual components are paid or estimated on the observation surface and multiplied by previously determined weighting factors
- DE-A-25 42 571 describes a method for sorting waste paper, in which the waste paper is placed directly in a shredder and the shredded waste paper is split into three fractions by means of two wind separators connected in series.
- the shredded waste paper is loosened up in the first wind sifter and to split off a first heavy fraction, which contains cardboard, cardboard and heavy kraft paper with a high enrichment.
- the remaining light fraction from the first air classifier is then fed to the second wind sifter and into a second heavy fraction, which contains cardboard, cardboard box and heavy kraft paper with a high concentration, as well as in a light fraction, which contains magazines, newspapers and other press papers, enriched, separated.
- the speeds of the wind separations are high.
- the collected waste paper contains heavy storage materials such as metals, sand, glass, etc., these can be overcome Here, small parts get into the first and second heavy goods, so that these heavy goods fractions and thus a considerable part of the waste paper used cannot be marketed as high-quality waste paper types. There is also the risk that shredded catalog prints, which are held together by glue or staples, get into the first and / or second heavy fraction and limit their marketability as department store paper (type B 19). The process also aims only at obtaining department store paper.
- DE-A-25 42 571 describes a method and a system for sorting and processing waste paper, in which the material fed is divided into three fractions 5, which are subsequently characterized in more detail by means of color detection.
- a blower is used for ejection, but this is not a wind separation ausvigt
- Air classifier separates the material and then a light material fraction moistened and thereby separated again. Particularly pure deinking qualities cannot be achieved with this technology.
- a deinking product with these features can be dissolved and suspended in a pulper in a relatively short time, processed further with a significantly reduced cleaning effort and increasing the quality of new paper.
- this deinking good can guarantee a quality-increasing degree of whiteness of the new paper when using conventional bleaching agents.
- the deinking goods according to the invention already have a degree of whiteness of approx. 42% after a coarse screening and heavy dirt separation in a hydrocyclone and before a fine screening.
- the degree of whiteness is approximately 41% with the same processing status. The degree of whiteness was measured using a reflection factor without a UV component.
- the complex step of heavy dirt removal can be carried out in the processing process (Cleaner) by means of a hydrocyclone or a plurality of hydrocyclones can be completely eliminated or at least simplified and carried out more cost-effectively.
- the whiteness of the new paper can be improved by 0.6 to 0.7% compared to the use of known deinking goods. With this percentage, the degree of whiteness of the new paper can be significantly increased and the value of the so-called dirt spot area can be significantly reduced.
- Rapid-Köthen laboratory sheets with 80 g / m 2 area-related mass can be produced from a sample to be tested, in which on both sides with a measuring area of 100 cm 2 by means of a scanner, for example a DOT Counter 2.0, size, number and area of particles can be determined.
- the proportion of cardboard and cardboard-containing materials should not be less than 0.08%, preferably 0.1%, and the sorting and separating effort should be kept within reasonably reasonable limits.
- the plastic and / or plastic-containing materials in the coarse sieve stage that can be separated as an overflow, so-called non-paper components, with a grain size of more than 7 mm (Spukstoffe 1), preferably 8 mm, and are in a grain size from 20 to 110 mm, preferably 30 to 90 mm, particularly preferably 35 to 60 mm, then these can be fed directly to a thermal recycling process virtually without further treatment.
- the explosives have a calorific value of over 18 MJ / kg, preferably 19 MJ / kg, with a water content of approximately 40%.
- the proportion of the contaminants I which can be separated off in the coarse sieve stage is less than 1.7%, preferably less than 1%.
- the lower limit of the share Hazardous substances I for an economical production of deinking goods is approximately 0.03%, preferably 0.05%.
- the proportion of the contaminants II which can be separated off in the fine screening is less than 0.8%, preferably less than 0.6%.
- the spooky substances II have a
- Grain size between 2.5 and 8 mm.
- the lower limit for the economical production of deinking goods is approximately 0.02%, preferably 0.03%, for the proportion of spooky substances II.
- the sticky area characterizing the adhesive content after hydrocyclone treatment and before fine screening is about 1.4 mm of the suspended deinking goods below 5000 mm 2 / kg otro.
- the otro unit is to be understood as an original dry substance.
- the number of stickies, which can also characterize the adhesive content is advantageously less than 7000 pieces / kg otro, preferably 6500 pieces / kg otro, in this process step.
- the deinking ware is preferably pressed together like a bail in order to ensure a simple and reliable task in a pulper and to avoid blowing away individual components. If the deinking goods are in the form of loose bulk goods, dissolving and loosening treatments can be dispensed with in a pulper before a task and a quick suspension can take place.
- Fig. 1 shows a schematic representation of an embodiment of a method for producing a deinking product according to the invention
- the deinking goods can be produced with reference to FIG. 1, for example, in the manner described in summary below.
- a waste paper mixture After screening off a department store waste paper fraction with a sieve hole size of approximately 200 to 450 mm, a waste paper mixture is comminuted to a grain size in the range of approximately 20 to 110 mm.
- a light material fraction which contains the deinking goods, is then split off from the shredded waste paper by means of a wind screening.
- the carrier air and possibly the dust are separated from the light material fraction by means of a cyclone.
- a sieve with a sieve hole width of approximately 280 to 400 mm With a sieve with a sieve hole width of approximately 280 to 400 mm, a particularly high-quality fraction of department store paper can be produced and the quality requirements for the deinking fraction can be met particularly reliably.
- the screening with the specified screen hole widths, the shredding of the waste paper to the proposed grain size and the air separation at a separation speed between 1 to 5 m / s also enable high throughputs with a consistently high quality of the fractions produced.
- the paper mixture is sieved and loosened by means of a ballistic separator provided with sieve openings.
- a suitable ballistic separator essentially comprises a plurality of flat profiles arranged next to one another at an incline, which can be moved horizontally and vertically, for example by means of a crankshaft drive, and - in contrast to ballistic separators known from density classification or sorting - are provided with passage openings for screening.
- the separation speed is in the range from 1.5 to 4.5 m / sec, preferably in the range from 1.7 to 3.5 m / sec, particularly high qualities can be ensured in the fractions produced.
- a suitable air classifier is known for example from DE-U-297 09 918. If the wind sifting takes place in a zigzag sifter, a particularly high degree of selectivity can be achieved between mixed paper and deinking. If the wind sifting takes place in a cross-flow sifter, particularly trouble-free operation can be guaranteed.
- the shredded paper mixture is fed in a particularly advantageous manner by means of a cellular wheel sluice into a wind sifter designed as a cone or cross-flow sifter.
- the cellular wheel sluice is preferably arranged eccentrically in the feed channel of the air classifier.
- the shredded paper mixture is preferably mechanically conveyed to the air classifier.
- the mechanical conveyance comprises a conveyor device designed as a paddle screw, connected pieces of paper can be gently dissolved at their kinks or folds without causing more violent tears. Otherwise, pieces of paper and catalogs held together by adhesive could be torn apart by violent tearing and end up in the deinking fraction, where they are undesirable due to their adhesive content and the associated difficulties in further processing.
- the mechanical conveyance furthermore preferably includes vibrors for feeding into the air classifier.
- the light material fraction that initially arises during wind sifting and contains the deinking fraction is advantageously split into the (conveying) air stream and deinking in a separating cyclone.
- the quality of the deinking fraction in particular the degree of whiteness, can be increased by presorting the paper mixture to be fed to the shredder by means of color and / or NIR (near infrared) detection and pneumatic discharge of identified contaminants.
- NIR near infrared
- through-colored papers can be separated early and effectively on the basis of their size and / or coloring, so that deinking and mixed paper fractions freed from through-colored papers can be produced.
- the manufacture of the deinking goods is explained in more detail below with reference to an exemplary embodiment of a device for sorting a waste paper mixture from a barrel collection, shown schematically in FIG.
- the device for sorting a waste paper mixture shown schematically in FIG. 1 comprises a sieve designed as a ball separator 1, a shredder designed as a granulator 2, a wind classifier designed as a cone classifier 3 which is connected downstream of the granulator 2 and a cyclone 4 connected downstream of the cone classifier 3
- a shredding device it has blow bars distributed over the circumference and in the axial direction of a rotor, which, in cooperation with an associated stator, result in a low-dust cutting-prank jam without squeezing the paper mixture into stuck-up shredder blocks.
- the shredding to the desired grain size is performed in the granulator 2 guaranteed by a sieve arranged below the rotor with a corresponding sieve hole width and a return of the material which has not yet been sufficiently comminuted to the engagement area of the rotor
- the shredding means prevent several sides from sticking together during the shredding, so that, at most, small pieces of paper sticking to one another, for example by block-like punching, are produced a hammer mill is also suitable, in which a relatively high level of dust can possibly be accepted
- a filter for dust separation from the carrier air is arranged downstream of the cyclone 4.
- a color sorting device 7 is connected between the ball separator 1 and the granulator 2, which separates colored paper components, for example colored paper Percentage of colored waste paper and the desired white limit values, the color sorting device 7 may be omitted.
- a conveyor device designed as a paddle screw 6 for conveying and loosening up the shredded paper mixture is arranged.
- a metal separator 8 with a downstream baler 9 is arranged downstream of the cone sifter 3 on the output side of the heavy material or the mixed paper fraction.
- the waste paper mixture delivered via a barrel collection is sieved and loosened by means of the ballistic separator 1 and fed to the granulator 2, where it is crushed to a grain size of approximately 35 mm.
- the sieving by means of the ballistic separator 1 separates approximately 10 to 25% of the paper mixture fed in as the upper run, which essentially comprises larger cardboards and already has the quality of department store paper (type B 19).
- the color sorting device 7 is connected between the ballistic separator 1 and the granulator 2, the colored papers are separated in this.
- the shredded and possibly freed of colored constituents waste paper mixture is then conveyed into the conical sifter 3 by means of the paddle screw 6 and vibrators (not shown) and there is split into a heavy goods fraction and a light goods fraction by means of an air flow (carrier air), the speed of the air flow being is set to about 3 m / sec.
- the heavy goods fraction is the mixed paper fraction, which largely consists of pieces of cardboard / cardboard, other pieces of paper and a small proportion of other contaminants, as well as the requirements for sorted mixed waste paper, a lower grade (type B 12), fulfilled.
- the light material fraction comprises the deinking fraction and the conveying air flow. In the wind sifting, they are in the shredded paper mixture contained cardboard-containing components to more than 95% separated and enriched in the mixed paper fraction
- the cyclone 4 is advantageously designed as a sifting cyclone with which in one process step or with one device, the deinking fraction can be separated from the carrier air and, at the same time, dust can be removed
- the air flow is then fed to the filter 5 and dedusted there
- the air classifier 3 has a sifting cross section of approximately 0.01 to 0.4 m 2 , preferably 0.05 to 0.3 m 2 in air is adjusted in such a way that a separation speed of approximately 1 to 5 m / sec, preferably 1.5 to 4.5 m / sec and particularly preferably 1.7 to 3.5 m / sec results in order to achieve a sufficient throughput ensure several wind classifiers 3 are connected in parallel
- cone sifter 3 and cyclone 4 had run through, approximately 40.5% of mixed paper and approximately 59.5% of deinking, based on the waste paper mixture fed to shredder 2, were obtained in an experiment.
- the deinking fraction consists of significantly more than 97.5% made of thin paper and has only a small proportion of thin cardboard and other storage materials
- the device can be provided with a wave screen in order to automatically separate large cardboards and to produce a high-quality fraction of cardboard in an economical manner
- a training of the sieve as a Balhstikseparator 1 has the advantage, however, that in addition to the sieve function, it also takes over a loosening function by a certain cyclical beating against the feed material and thus ensures that the shredder 2 is fed single or loose leaves as possible, so that there is no compression during shredding a multilayer newspaper / magazine can be made on the cut edges.
- This loosening significantly increases the deinking yield. If the loosening function is dispensed with, you have to accept a correspondingly lower yield, since the shredded pieces of paper that may have been pressed together could get into the heavy goods
- the wind sifting is a modification of the aforementioned tests or the above exemplary embodiment using a cross-flow classifier carried out, a compact design of the air classification stage can be implemented with little investment.
- a cross-flow classifier the shredded paper mixture can advantageously be separated in free fall and any caking of moist pieces of paper on internals can be avoided
- the paper mixture is sieved in two stages.
- the sieve designed as a Balhstik separator 1 can have a two-stage design.
- a particularly useful Balhstik separator 1 can have on average essentially sawtooth-shaped profiles with two successive areas of different sieve hole widths. In a first The sieve hole size range is approximately 40 to 60 mm. In a second area, the sieve hole width is approximately 200 to 450 mm, preferably 280 to 400 mm.
- the steps described above can thus be used to produce a particularly good quality deinking ware which has unprecedented levels of purity, in particular a low proportion of contaminants of less than 3.5%.
- Less than 1.7% of the contaminants consist (based on the total weight of the deinking ware) cardboard-containing materials, and less than 1.5% from non-cardboard or paper-containing storage materials, which predominantly comprise film-shaped plastics.
- the proportion of non-cardboard or paper-containing storage materials is on average around 0.8% As a rule, a share of newspapers and magazines of more than 97.5%, possibly even over 98%, is far superior to known demking goods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Cereal-Derived Products (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50010360T DE50010360D1 (de) | 1999-11-12 | 2000-11-10 | Altpapiergemisch für Deinkingprozess |
AT00988573T ATE295910T1 (de) | 1999-11-12 | 2000-11-10 | Altpapiergemisch für deinkingprozess |
AU25016/01A AU2501601A (en) | 1999-11-12 | 2000-11-10 | De-inked product |
DE10083526T DE10083526D2 (de) | 1999-11-12 | 2000-11-10 | Deinkingware |
EP00988573A EP1244838B1 (de) | 1999-11-12 | 2000-11-10 | Altpapiergemisch für Deinkingprozess |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19954737.8 | 1999-11-12 | ||
DE19954737 | 1999-11-12 | ||
DE1999157707 DE19957707A1 (de) | 1999-11-12 | 1999-11-30 | Deinkingware |
DE19957707.2 | 1999-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001036738A1 true WO2001036738A1 (de) | 2001-05-25 |
Family
ID=26055538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/003931 WO2001036738A1 (de) | 1999-11-12 | 2000-11-10 | Deinkingware |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1244838B1 (de) |
AT (1) | ATE295910T1 (de) |
AU (1) | AU2501601A (de) |
DE (1) | DE10083526D2 (de) |
WO (1) | WO2001036738A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1006582C1 (nl) * | 1997-07-14 | 1999-01-15 | Bollegraaf Appingedam Maschf | Sorteertransporteur voor het scheiden van papier en karton. |
DE19907983A1 (de) * | 1999-02-25 | 2000-09-07 | U T G Ges Fuer Umwelttechnik G | Verfahren und Einrichtung zur Sortierung eines Papiergemisches |
WO2000071810A1 (de) * | 1999-05-25 | 2000-11-30 | U.T.G. Gesellschaft Für Umwelttechnik Gmbh | Verfahren und einrichtung zur sortierung eines papiergemisches |
-
2000
- 2000-11-10 EP EP00988573A patent/EP1244838B1/de not_active Expired - Lifetime
- 2000-11-10 AU AU25016/01A patent/AU2501601A/en not_active Abandoned
- 2000-11-10 DE DE10083526T patent/DE10083526D2/de not_active Expired - Fee Related
- 2000-11-10 AT AT00988573T patent/ATE295910T1/de not_active IP Right Cessation
- 2000-11-10 WO PCT/DE2000/003931 patent/WO2001036738A1/de active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1006582C1 (nl) * | 1997-07-14 | 1999-01-15 | Bollegraaf Appingedam Maschf | Sorteertransporteur voor het scheiden van papier en karton. |
DE19907983A1 (de) * | 1999-02-25 | 2000-09-07 | U T G Ges Fuer Umwelttechnik G | Verfahren und Einrichtung zur Sortierung eines Papiergemisches |
WO2000071810A1 (de) * | 1999-05-25 | 2000-11-30 | U.T.G. Gesellschaft Für Umwelttechnik Gmbh | Verfahren und einrichtung zur sortierung eines papiergemisches |
Also Published As
Publication number | Publication date |
---|---|
EP1244838B1 (de) | 2005-05-18 |
AU2501601A (en) | 2001-05-30 |
ATE295910T1 (de) | 2005-06-15 |
DE10083526D2 (de) | 2002-12-19 |
EP1244838A1 (de) | 2002-10-02 |
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