EP1598477A1 - Tamis sous pression pour tamiser une suspension de fibres - Google Patents

Tamis sous pression pour tamiser une suspension de fibres Download PDF

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Publication number
EP1598477A1
EP1598477A1 EP05006347A EP05006347A EP1598477A1 EP 1598477 A1 EP1598477 A1 EP 1598477A1 EP 05006347 A EP05006347 A EP 05006347A EP 05006347 A EP05006347 A EP 05006347A EP 1598477 A1 EP1598477 A1 EP 1598477A1
Authority
EP
European Patent Office
Prior art keywords
pressure sorter
inlet
sieve
suspension
pressure
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
Application number
EP05006347A
Other languages
German (de)
English (en)
Other versions
EP1598477B1 (fr
Inventor
Reimund Rienecker
Stefan Rippl
Peter Schweiss
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
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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1598477A1 publication Critical patent/EP1598477A1/fr
Application granted granted Critical
Publication of EP1598477B1 publication Critical patent/EP1598477B1/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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/34—Other mills or refiners
    • 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
    • D21D5/16—Cylinders and plates for screens
    • 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
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/22—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in apparatus with a vertical axis

Definitions

  • the invention relates to a pressure sorter according to the preamble of claims 1 and 13.
  • Pressure sorters are used in the reprocessing of paper pulp suspensions, namely to process the pulp suspension in a wet sieving.
  • the in the suspension contained fibers should pass through the openings, while the unwanted solid constituents are rejected and led out of the sorter again.
  • Sorting holes are usually used round holes or slots.
  • Pressure graders of the type considered here are equipped with sieve scrapers close to the sieve be moved past. As a result, in a conventional manner, the clogging of the screen openings prevented.
  • the release effect of a pressure sorter is therefore due to the fact that at least a part of the impurities contained in the supplied pulp suspension do not pass through the sieve can therefore, because of the size, shape or flexibility is separated from the paper fibers.
  • pressure sorters where additionally a specifically aimed at the density of the impurities Separation is made by the forces different in a centrifugal field Impurities are used. Even if the separation effect is optimal only in hydrocyclones and Nevertheless, centrifuges can be used in pressure sorters. Although one would large part of the heavy parts anyway not through the commonly used sieve openings fit through, so there are rejected, but there is a risk of damage or wear when coming into contact with the sieve. This risk is reinforced in that almost always Siebmaschiner be used, which is very close to the sieve with relative high speed past.
  • Another way to reduce wear on the screen of the pressure sorter is It is to arrange the sieve broker on the accept side of the sieve. This causes the am Sieve rejected parts have a lower speed and not detected by the Siebschreibr can be. In particular, the damage caused by pinching metal parts between sieve and Siebschreibrn is very unlikely.
  • the invention is based on the object to further improve the known pressure sorters so that a considerable part of the impurities are removed from the paper fiber suspension can, before they hit the sieve. In particular, wear-promoting Heavy parts and delicate lightweight parts are removed early.
  • This object is in a pressure sorter according to claim 1 by in the plate of the Claim 1 mentioned features.
  • the inventive measures significantly more favorable flow conditions are generated, which in particular for the inlet chamber applies.
  • This is generally annular and is connected by a tangentially attached inlet with the supplied to be sorted pulp suspension, whereby a rotational flow is formed. Due to the centrifugal forces generated thereby, the heavy parts become radially outward thrown so that they can not or hardly come into contact with the sieve. They are drifting in the direction of the inner wall of the housing and are partly by the suspension flow on towed and partly transported by gravity into a part of the Zulaufraumes from which they can be easily removed.
  • the radially inside of the screen - so good material - rotating Siebschreibr generates pressure and suction pulses in the accepts space to keep the sieve openings free.
  • the Sieblaker has a direction of rotation, which is opposite to the direction of rotation in the Zulaufraum located rotating liquid ring is directed. This is advantageous because theticianreriel in cooperation with the screen an opposite rotational flow in Generate inlet space, ie drive the suspension in the inlet space in the direction, which she already has from the inlet.
  • the lightweight parts are made by the centrifugal forces of the Heavy parts separate and move up the wire along the top and can be easily removed become. Due to the pronounced rotational flow and directly on the screen, the inclination of Light parts low, stick to it. In this way, without additional apparative Effort and at about the same energy consumption, the separation effect of heavy parts and of Light parts in the Zulaufraum significantly improved.
  • FIG. 1 A typical embodiment of the pressure sorter according to the invention is shown in FIG. 1.
  • This contains in a housing 2 a sieve 1 in the form of a cylindrical screen basket.
  • the midline of the Sieves 1 is vertical here in the operating position of the device.
  • the sieve openings are advantageously cylindrical along their entire length with a Diameter between one and three millimeters.
  • the pulp suspension S to be screened becomes introduced through an inlet 8 in the housing 2.
  • the inlet room 4 which is substantially annular and radially outside the screen 1 as part of the housing. 2 extends.
  • the inlet 8 is tangential to the inlet space 4 connected, so that when operating the machine in the inlet space 4, a rotational flow which rotates clockwise in this illustration.
  • the supplied pulp suspension S moves in the inlet space 4 helically below, with a considerable part of this suspension passing through the sieve opening of the sieve 1 and into can reach the accepting space 3 located radially inside the screen 1.
  • a conical Tapered portion 15 of the inlet space 4 the peripheral speed of Suspension obtained or increased, even if their amount due to the outflow through the Sieve 1 decreases.
  • Gutgutraum 3 is the Siebierr 5, which is provided here with a number of wings 6 is, which are preferably driven at a peripheral speed of at least 15 m / s. By relative movement to the surrounding liquid they produce pressure and suction joints, with where the screen openings are kept free.
  • the Siebschreibr 5 is in the lower part of the housing. 2 cantilevered (storage and sealing unit 16) and is driven in rotation. As shown in FIG. 2, is the Siebschreibr 5 driven so that its peripheral speed of the opposite tangential inflow direction at the inlet 8. The benefits of this antagonism are already been called. As a result of the rotational flow formed in the inlet space 4 act on the Pulp suspension S centrifugal forces.
  • the pulp suspension S to be screened is not only heavy but also heavy contaminated with light parts, including in particular Styrofoam or other lightweight foams belong. These are separated due to the centrifugal forces quickly from the heavy parts and can be removed early, as they are in liquid due to their rising tendency move the filled inlet space 4 into the upper part. You will be there through thechtteilauslass 11 dissipated.
  • the axial length of this cylinder wall 14 is only a fraction of the axial length of the screen 1, e.g. about 20%.
  • the climbing effect of the light parts can in this area Additionally supported by a fixed helix, the circumferential movement in redirects an ascending movement.
  • the accepts space 3 has here at its uppermost part a vent line 12, through the air and possibly also very fine lightweight parts can be removed from the accepts.
  • Figures 3 and 4 serve to show even more solutions with specific details. So has the Device according to FIG. 3, a modified flow guidance, by the accepts A from the Gutgutraum 3 not as in Fig. 1 down, but is discharged upward, i. that the Gutstoffauslass 9 'is centrally connected to the upper wall of Acceptance space 3. The so deducted Acceptance A contains then in addition to the sorted fibers and air, which is why another Vent line can be omitted.
  • the ejected in the inlet 4 outward heavy parts be by a vertical or oblique on the housing 2 radially projecting Schwerteilkanal 18 led directly down to the heavy part lock 13.
  • This version (“heavy metal trap”) prevents longer rotation of heavy parts in the housing and is also in the in Figures 1 and 4 shown sorters possible.
  • the device according to FIG. 3 has a possibility to rejected heavy parts by means of a slope 17 at a location below the accepts space 3 Continuation of the inlet chamber 4 better to lead to the heavy section lock 13.
  • the inlet 4 is topped off by a slope 20, at the highest point of thechtstoffauslass 11 'is connected.
  • the pressure sorter in Fig. 4 is provided with an inlet space 4 ', whose cross section over the axial Height is kept substantially constant, since there is no need for a tapered section has been. Also, a special separate light parts collection space above the screen 1 can if necessary, be omitted to save height.
  • the lightweight parts are made by thechtteilauslass 11 derived immediately. In the lower part of the inlet chamber 4 'is located after one down sloping end wall 19, which together arrived there the heavy parts with the reject R out of the housing through the reject outlet 10. Conveniently, the reject outlet 10 is connected at the lowest point. Another Schwerteilauslass can then be saved.
  • the end wall 19 may have an arcuate shape.
  • the preferred use case of this device is the or Coarse sorting of dissolved pulp.
  • This can, according to FIG. 5 typically one in a Pulper 21 formed from waste paper P and water W and by a coarse Pulpersieb 22nd be withdrawn waste paper suspension.
  • a Pulpersieb 22 is by a rotor 23rd kept free and usually has holes with a diameter between 10 and 25 mm.
  • the through this withdrawn waste paper suspension is without further screening device via fabric pump 24 in pumped the inlet 8 of an inventively designed pressure sorter. Therefore, this can Suspension S be mixed with a larger amount of impurities, which readily adhere Withhold screen openings whose diameter is e.g. in a range between 1 and 3 mm lies.
  • contaminated waste paper suspensions in a High-consistency pulper or in a dissolving drum with downstream open screening device, such as. an open sorting drum, and dilution can be made.
  • a dissolving drum the is suitable for the process, e.g. the German patent application DE 197 36 143.

Landscapes

  • 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)
EP05006347A 2004-05-21 2005-03-23 Tamis sous pression pour tamiser une suspension de fibres Expired - Lifetime EP1598477B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004025149 2004-05-21
DE102004025149A DE102004025149A1 (de) 2004-05-21 2004-05-21 Drucksortierter zum Sieben einer Faserstoffsuspension

Publications (2)

Publication Number Publication Date
EP1598477A1 true EP1598477A1 (fr) 2005-11-23
EP1598477B1 EP1598477B1 (fr) 2007-11-14

Family

ID=34934447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05006347A Expired - Lifetime EP1598477B1 (fr) 2004-05-21 2005-03-23 Tamis sous pression pour tamiser une suspension de fibres

Country Status (8)

Country Link
US (1) US20050258079A1 (fr)
EP (1) EP1598477B1 (fr)
JP (1) JP2005336698A (fr)
KR (1) KR20060048053A (fr)
AT (1) ATE378458T1 (fr)
CA (1) CA2508066A1 (fr)
DE (2) DE102004025149A1 (fr)
ES (1) ES2295994T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102191710A (zh) * 2011-04-06 2011-09-21 李�昊 一种经改造的间歇式压力筛浆机
CN110013955A (zh) * 2018-01-09 2019-07-16 宝山钢铁股份有限公司 一种用于过滤粉剂中大颗粒杂物的过滤装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20050063A1 (it) * 2005-04-18 2006-10-19 Pal Srl Apparecchiatura e procedimento per separare particelle di granulometria finissima da una massa incoerente di materiale legnoso
DE102011115354B4 (de) 2011-10-07 2017-01-05 Telejet Kommunikations Gmbh Navigation anhand von zufälligen Mustern
FI126520B (en) * 2016-03-16 2017-01-31 Red Wire Oy Method of screening and screening device
JP2019060056A (ja) * 2017-09-28 2019-04-18 相川鉄工株式会社 スクリ−ン装置及びスクリ−ン装置の異物分離方法
CN112108237B (zh) * 2020-09-09 2021-12-21 湖南连心科技有限公司 一种粉末涂料颗粒控制的过筛设备
JP7317153B1 (ja) * 2021-09-01 2023-07-28 三菱電機株式会社 異物除去装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231539B (de) * 1960-07-08 1966-12-29 Lamort E & M Sichter fuer Papierstoffsuspensionen
US3545621A (en) * 1967-06-14 1970-12-08 Etablis E & M Lamort Fils Apparatus for purifying liquids carrying suspended solid particles,chiefly pulp for paper mills
US4287055A (en) * 1978-07-11 1981-09-01 Firma Hermann Finckh Maschinenfabrik Gmbh & Co. Method of sorting fibre suspensions as well as a pressure sorter for performing the method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911234A1 (de) * 1989-04-07 1990-10-11 Voith Gmbh J M Sortierer
US5221437A (en) * 1991-07-08 1993-06-22 The Black Clawson Company Screening apparatus for paper making stock
US20050115690A1 (en) * 2003-11-25 2005-06-02 Casella Waste Systems, Inc. Methods for producing recycled pulp from waste paper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231539B (de) * 1960-07-08 1966-12-29 Lamort E & M Sichter fuer Papierstoffsuspensionen
US3545621A (en) * 1967-06-14 1970-12-08 Etablis E & M Lamort Fils Apparatus for purifying liquids carrying suspended solid particles,chiefly pulp for paper mills
US4287055A (en) * 1978-07-11 1981-09-01 Firma Hermann Finckh Maschinenfabrik Gmbh & Co. Method of sorting fibre suspensions as well as a pressure sorter for performing the method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102191710A (zh) * 2011-04-06 2011-09-21 李�昊 一种经改造的间歇式压力筛浆机
CN102191710B (zh) * 2011-04-06 2013-04-03 李�昊 一种经改造的间歇式压力筛浆机
CN110013955A (zh) * 2018-01-09 2019-07-16 宝山钢铁股份有限公司 一种用于过滤粉剂中大颗粒杂物的过滤装置

Also Published As

Publication number Publication date
DE102004025149A1 (de) 2005-12-15
DE502005001926D1 (de) 2007-12-27
ATE378458T1 (de) 2007-11-15
JP2005336698A (ja) 2005-12-08
ES2295994T3 (es) 2008-04-16
EP1598477B1 (fr) 2007-11-14
KR20060048053A (ko) 2006-05-18
CA2508066A1 (fr) 2005-11-21
US20050258079A1 (en) 2005-11-24

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