EP1245724B1 - Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés et son utilisation - Google Patents

Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés et son utilisation Download PDF

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Publication number
EP1245724B1
EP1245724B1 EP02001744A EP02001744A EP1245724B1 EP 1245724 B1 EP1245724 B1 EP 1245724B1 EP 02001744 A EP02001744 A EP 02001744A EP 02001744 A EP02001744 A EP 02001744A EP 1245724 B1 EP1245724 B1 EP 1245724B1
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EP
European Patent Office
Prior art keywords
wire
pressure sorter
housing
sorter according
wires
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.)
Expired - Lifetime
Application number
EP02001744A
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German (de)
English (en)
Other versions
EP1245724A2 (fr
EP1245724A3 (fr
Inventor
Michael Danger
Reimund Reinecker
Samuel Dr. Schabel
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 Paper Patent GmbH
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Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1245724A2 publication Critical patent/EP1245724A2/fr
Publication of EP1245724A3 publication Critical patent/EP1245724A3/fr
Application granted granted Critical
Publication of EP1245724B1 publication Critical patent/EP1245724B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Definitions

  • the invention relates to a pressure sorter according to the preamble of claim 1.
  • Such a pressure sorter is for example from the US 4,913,806 A known.
  • Pressure sorters are used in the processing of paper fiber suspensions, namely to process the pulp suspension in a wet sieving. Includes Such a pressure sorter at least one screen, with a plurality of openings is provided. The fibers contained in the suspension should pass through the openings while rejecting the undesired solid constituents and out of the sorter again. Pressure graders can also be used for Fiber fractionation can be used in the overflow the long fibers and in the Pass the short fibers are enriched. As sorting openings are in the Usually round holes are used or slots. In most cases, there are pressure sorters of the type considered here, equipped with sieve scrapers close to the sieve be moved past. As a result, in a conventional manner clogging the Prevents sieve openings.
  • WO 00/58549 A1 shows a sorter with a vertical housing, in which two successively flowed through by the paper fiber suspension to be cleaned through sieve elements are located.
  • the two sieve elements are at least partially axially in one another pushed, which allows a compact design.
  • this sorter is for the Gross sorting thought. With a rotatably driven screen basket should therefore the Wear can be reduced, but which makes the machine complicated and expensive.
  • the invention is based on the object to build a pressure sorter so that he is compact and has a good release effect even with fine impurities and at the same time a relatively high throughput allowed.
  • the number of Reduce pressure sorters decisively even with high quality requirements.
  • Particular advantages are offered by a pressure sorter according to the invention in fine sorting. Especially at the points of pulp processing, which involves the removal of especially fine impurities goes (usually there is the slot sorting carried out), the pressure sorter used for it must be relatively large. Only like that With the fineness of the sorting openings, sufficient throughputs can be reliably ensured be encouraged.
  • the invention develops its advantages especially where the series connected Sieves are fine sieves and have about the same screen characteristics, ie in the same Sort size range. This is especially the case when the strainers with similar ones or the same slots are provided, with a slot width of at most 0.8 mm, preferably less than 0.3 mm. It has been shown that in technical Applications sorting a single stage for the required quality is often not sufficient, especially if the impurities in the same order of magnitude how the fibers are present, and therefore the sieve with a certain probability can happen. This also applies to the highly effective pressure sorters Schlitzsiebkörben. Critical impurities are mainly adhesive particles (stickies). With narrower sorting openings can not solve this problem. That's why one has to another identical sorting step with the already cleaned substance thereby making the probability of elimination of difficult to increase sortable substances.
  • the Rejektrate on the upstream sieve significantly higher is set as at the downstream.
  • the Rejektrate is the volumetric Amount ratio of the overflow, based on the inlet to the corresponding sieve. Because of the higher content of contaminants in the inlet to the upstream sieve can there an approximately twice the Rejektrate be set as the downstream sieve.
  • the pressure sorter shown in Fig. 1 has two wires 1 and 2, which are axially are offset to each other so far that they are in different rooms.
  • the pulp suspension S is introduced into the housing 6 'via a downflow inlet 3. That's why it lies first through sieve 1 below and the second sieve 2 above.
  • the accept A1 that is the Passage of the first screen 1 is from the first accepts space 13 via an external - Here pump-free - pipe 17 returned to the pressure sorter, by enters an intermediate inlet 16, which is located at the upper part of the housing 6 '.
  • the operation of the sorter is in between Inlet 3 and Gutstoffauslaufstutzen 4 an applied from the outside pressure gradient at. If this overpressure compensates the pressure loss of both screens, the in special cases greatly increase the pressure in the inlet chamber of the first sieve. To this To be able to keep pressure lower, then would be a booster pump in the Pipe 17 conceivable. Or the Siebierr rotor receives at its upper Stimulation surface pumping blades 23 (dashed lines), which causes a pressure increase cause.
  • the accepts A1 passes from the intermediate inlet 16 into the inlet space of the second sieve 2. If he has passed this and has entered the second accepts room 14, he can as accepts A2 through the accepts outlet 4 out of the housing become.
  • To simplify the drawing of the Gutstoffauslaufstutzen 4 is in the upper Part of the housing 6 ', ie above the housing division 20, shown. With advantage (easy opening of the housing) it is in the lower part. Then there is one Provide accepts collection chamber 28, as shown in Fig. 2.
  • the special one Construction of this pressure sorter allows - if desired - the two rejects R1 and R2 in a common Rejektauslauf 11 out of the housing. A unwanted mixing of the rejects with the accepts is thereby by this Art avoided the construction.
  • the Rejektfluß is an aperture provided, e.g. as part of the Sieb Anlagenrs 5, so mitfront.
  • the Aperture 12 be adjustable.
  • the Siebschreibr 5 is here drum-shaped with mounted clearing elements. Variations of different clearing elements are always possible and correct depending on the circumstances and requirements.
  • Fig. 2 shows the already mentioned variant: The Gutstoffauslaufstutzen 4 is located below the housing division 20, which facilitates its opening.
  • the second Acceptance A2 For this purpose, from the second Acceptance space 14 into an accepts collection chamber 28th derived, which extends only over a small part of the housing circumference. To this then the Gutstoffauslaufstutzen 4 is connected.
  • the pressure sorter according to FIG. 3 is particularly favorable the center line 30 of the housing 6 '' 'does not coincide with the center line 31 of the rotor 5 together, this offset being the distance of the rotor from the two Gutstoffan gleichtutzen 4 and 15 increased. That leads with simple means larger flow cross sections at the areas of larger accepts volume flows.
  • This eccentricity 32 may be approximately between 40 and 200 mm, depending on Housing size and is advantageously determined so that the flow rate of Gutstoffströme anywhere unfavorable values can take.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)

Claims (15)

  1. Tamis sous pression pour éliminer des substances perturbatrices d'une suspension (S) de fibres de papier renfermant des substances perturbatrices, comprenant un carter (6', 6''') renfermant au moins deux cribles cylindriques (1, 2),
       le premier crible (1) étant situé axialement à l'extérieur de l'espace dans lequel le second crible (2) se trouve,
       la suspension (S) de fibres de papier, à l'état délivré, étant guidée radialement de l'intérieur vers l'extérieur dans le carter (6', 6'''), à travers les deux cribles cylindriques (1, 2),
       le carter présentant au moins un raccord d'admission (3), au moins un raccord (4) d'écoulement de matière et au moins une sortie (9, 10) des rejets,
       les cribles (1, 2) étant agencés de façon telle qu'ils puissent être parcourus, en succession, par la suspension (S) de fibres de papier introduite dans le carter en empruntant le raccord d'admission (3), du fait que la part de ladite suspension (S) de fibres de papier, qui a franchi le premier crible (1) en tant que première matière (A1), peut affluer vers le second crible (2),
       le raccord d'écoulement de matière (15), affecté à la première matière (A1) du crible (1) situé en amont, étant relié extérieurement à une entrée intermédiaire (16) ménagée sur le carter (6') et menant au côté afflux du crible (2) situé en aval,
       et
       la part de la suspension (S) de fibres de papier, qui a également franchi le second crible (2), étant de nouveau expulsée du carter en tant que seconde matière (A2), en empruntant le raccord (4) d'écoulement de matière,
       caractérisé par le fait    que le crible (1), parcouru en premier par la suspension (S) de fibres de papier, occupe une position basse dans le carter (6', 6'''), le second crible (2) occupant une position haute ; et
       par le fait que la suspension (S) de fibres de papier est introduite dans ledit carter (6', 6''') par l'intermédiaire d'un raccord d'admission (3) situé en partie basse.
  2. Tamis sous pression selon la revendication 1,
       caractérisé par
       la présence précise de deux paniers cylindriques de criblage.
  3. Tamis sous pression selon la revendication 1 ou 2,
       caractérisé par le fait    que les deux cribles (1, 2) présentent des orifices de triage en forme de fentes.
  4. Tamis sous pression selon la revendication 3,
       caractérisé par le fait    que la largeur des fentes mesure 0,8 mm au maximum.
  5. Tamis sous pression selon la revendication 4,
       caractérisé par le fait    que la largeur des fentes mesure 0,3 mm au maximum.
  6. Tamis sous pression selon l'une des revendications précédentes,
       caractérisé par le fait    que l'effet de triage est sensiblement identique sur les deux cribles (1, 2).
  7. Tamis sous pression selon l'une des revendications précédentes,
       caractérisé par le fait    qu'au moins deux cribles (1, 2) sont agencés coaxialement.
  8. Tamis sous pression selon la revendication 7,
       caractérisé par le fait    qu'au moins deux cribles (1, 2) sont maintenus exempts d'obstructions par un unique nettoyeur rotatif (5), les éléments nettoyeurs (7, 8) de ce dernier passant à faible distance en regard des surfaces desdits cribles (1, 2).
  9. Tamis sous pression selon la revendication 8,
       caractérisé par le fait    que le crible (1), le plus rapproché de l'entraínement du nettoyeur (5), possède un plus grand diamètre que le crible (2) plus éloigné.
  10. Tamis sous pression selon l'une des revendications précédentes,
       caractérisé par le fait    que le carter (6', 6"') ne présente aucune liaison intérieure entre le compartiment (13) à matière du crible (1) situé en amont, et la chambre d'afflux du crible (2) situé en aval.
  11. Tamis sous pression selon l'une des revendications précédentes,
       caractérisé par le fait    que le raccord (15) d'écoulement de matière du crible (1) situé en amont occupe une position radialement extérieure ; et
       par le fait que l'entrée intermédiaire (16) occupe une position centrale.
  12. Tamis sous pression selon l'une des revendications précédentes,
       caractérisé par le fait    que la liaison extérieure s'opère par l'intermédiaire d'un conduit tubulaire (17) dépourvu de pompe.
  13. Tamis sous pression selon l'une des revendications 8 à 12,
       caractérisé par le fait    que le rotor, servant de nettoyeur (5) des cribles, comporte des ailettes de pompage (23) sur sa surface extrême supérieure.
  14. Utilisation du tamis sous pression selon l'une des revendications précédentes, la consistance de la suspension (S) de fibres de papier, à l'état délivré, étant comprise entre 1 et 3 %, et ladite suspension (S) de fibres de papier étant exempte de substances perturbatrices dures d'une grosseur supérieure à 3 mm.
  15. Utilisation selon la revendication 14,
       caractérisée par le fait    que le débit des rejets du premier crible (1) est réglé sur au moins 1,5 fois, de préférence sur le double du débit des rejets du second crible (2).
EP02001744A 2001-03-28 2002-01-25 Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés et son utilisation Expired - Lifetime EP1245724B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10115298A DE10115298A1 (de) 2001-03-28 2001-03-28 Drucksortierer zum Entfernen von Störstoffen aus einer störstoffhaltigen Papierfasersuspension
DE10115298 2001-03-28

Publications (3)

Publication Number Publication Date
EP1245724A2 EP1245724A2 (fr) 2002-10-02
EP1245724A3 EP1245724A3 (fr) 2003-07-02
EP1245724B1 true EP1245724B1 (fr) 2005-12-07

Family

ID=7679390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02001744A Expired - Lifetime EP1245724B1 (fr) 2001-03-28 2002-01-25 Tamis sous pression pour l'épuration de pâte à papier contenant des impuretés et son utilisation

Country Status (7)

Country Link
US (1) US20020139723A1 (fr)
EP (1) EP1245724B1 (fr)
JP (1) JP2002339283A (fr)
AT (1) ATE312231T1 (fr)
CA (1) CA2379425A1 (fr)
DE (2) DE10115298A1 (fr)
ES (1) ES2252327T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9901148L (sv) * 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
DE102006055316B3 (de) * 2006-11-23 2008-01-31 Voith Patent Gmbh Siebapparat für eine verschmutzte Faserstoffsuspension und seine Verwendung
US8869988B2 (en) * 2008-05-08 2014-10-28 M-I L.L.C. Cooling and classifying apparatus for pelletized product processing
US8011515B2 (en) * 2009-05-12 2011-09-06 Ovivo Luxembourg S.á.r.l. Two stage pulp screening device with two stationary cylindrical screens
CN105696400B (zh) * 2015-03-26 2018-04-03 潍坊信合达机械有限公司 一种造纸业用复合式压力筛
CN106368038B (zh) * 2016-11-17 2017-11-24 绥阳县双龙纸业有限公司 一种升流式压力筛
CN107641996B (zh) * 2017-11-14 2023-06-09 新乡市新平航空机械有限公司 一种新型压力筛转子
DE102021112389A1 (de) 2021-05-12 2022-11-17 Voith Patent Gmbh Mehrstufige Sortiervorrichtung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223239A (en) * 1962-05-11 1965-12-14 Bird Machine Co Pressure type screening devices
DE2140904C3 (de) * 1971-08-16 1974-05-09 Hermann Finckh, Metalltuch- Und Maschinenfabrik, 7410 Reutlingen Drucksortierer für Faserstoffsuspensionen
US4302327A (en) * 1980-03-17 1981-11-24 The Black Clawson Company Center flow screening apparatus
SE464640B (sv) * 1988-06-16 1991-05-27 Kamyr Ab Apparat foer silning av en suspension av en fiberhaltig cellulosamassa
SE461665B (sv) * 1988-07-04 1990-03-12 Kamyr Ab Apparat foer silning av en suspension av en fiberhaltig cellulosamassa
US5119953A (en) * 1990-04-02 1992-06-09 Celleco Hedemora Ab Pulp suspension screening and fractionation apparatus
FI902968A (fi) * 1990-06-13 1991-12-14 Sunds Defibrator Jylha Oy Siktenhet foer sortering av massor, saerskilt pappersmassa.
FI93979C (fi) * 1993-08-20 1995-06-26 Tampella Oy Valmet Menetelmä ja painelajitin kuitumassan lajittelemiseksi
US5575395A (en) * 1994-07-15 1996-11-19 A. Ahlstrom Corporation Method and apparatus for screening fibrous suspensions
US5884774A (en) * 1996-03-11 1999-03-23 Aikawa Iron Works Co., Ltd. Papermaking screen
DE19702044C1 (de) * 1997-01-22 1998-04-16 Voith Sulzer Stoffaufbereitung Sichter für eine Faserstoffsuspension
SE511786C2 (sv) * 1998-03-06 1999-11-22 Sunds Defibrator Ind Ab Silanordning med två silkammare för separering av fibersuspensioner
SE9901148L (sv) * 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
JP3443361B2 (ja) * 1999-04-23 2003-09-02 相川鉄工株式会社 スクリーン装置
AT408771B (de) * 2000-02-03 2002-03-25 Andritz Ag Maschf Sortierer zur reinigung einer faserstoffsuspension

Also Published As

Publication number Publication date
CA2379425A1 (fr) 2002-09-28
US20020139723A1 (en) 2002-10-03
JP2002339283A (ja) 2002-11-27
EP1245724A2 (fr) 2002-10-02
ES2252327T3 (es) 2006-05-16
DE10115298A1 (de) 2002-10-17
DE50205150D1 (de) 2006-01-12
ATE312231T1 (de) 2005-12-15
EP1245724A3 (fr) 2003-07-02

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