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EP0658648B1 - Procédé et dispositif pour la séparation en continu de substances désirables et indésirables dans une suspension de fibres - Google Patents

Procédé et dispositif pour la séparation en continu de substances désirables et indésirables dans une suspension de fibres Download PDF

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Publication number
EP0658648B1
EP0658648B1 EP94117139A EP94117139A EP0658648B1 EP 0658648 B1 EP0658648 B1 EP 0658648B1 EP 94117139 A EP94117139 A EP 94117139A EP 94117139 A EP94117139 A EP 94117139A EP 0658648 B1 EP0658648 B1 EP 0658648B1
Authority
EP
European Patent Office
Prior art keywords
distributor
substance
streams
good
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.)
Expired - Lifetime
Application number
EP94117139A
Other languages
German (de)
English (en)
Other versions
EP0658648A3 (fr
EP0658648A2 (fr
Inventor
Hans-Joachim Dr. Schultz
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0658648A2 publication Critical patent/EP0658648A2/fr
Publication of EP0658648A3 publication Critical patent/EP0658648A3/fr
Application granted granted Critical
Publication of EP0658648B1 publication Critical patent/EP0658648B1/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
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
    • D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow
    • 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
    • D21F1/06—Regulating pulp flow
    • D21F1/065—Shock-absorbing devices

Definitions

  • the invention relates to a method for continuous Separate desired from contained in a stock suspension undesirable substances with the characteristics of the generic term of Claim 1.
  • the invention further relates to a Device for performing the method according to the invention according to the preamble of claim 6.
  • the division of the feed stream of the fiber suspension into partial streams usually happens in such a way that first the inflow of Inlet opening of a more or less far in the direction of flow the fiber suspension extended, as a so-called distributor known flow element is supplied that the fiber suspension then one more or decreasing proportions runs less long route in the distributor, its cross section in terms of the working pressure of the cleaners to achieve the best possible Effect of parallel cleaners in predetermined Dimensions decreases, with in the direction of flow predetermined distance of consecutive points of the distributor one of the partial streams from the feed stream of the fiber suspension branched off for the separation or cleaning process and that finally a remaining, remaining Partial flow of the fiber suspension through the outlet opening of the Distributor removed and fed to this circuit again.
  • Such preconditions are in particular constant, Predefined consistency, constant, predetermined degree of grinding of the fibers contained in the fiber suspension, constant Flow rate of the feed stream to the mentioned Distributor and the greatest possible freedom from vibrations in the Flow.
  • the distribution of the feed stream of the fiber suspension to be processed in partial flows thus takes place under flow conditions, which is the target of fluctuations in throughput, the degree of grinding and the consistency of the fiber suspension and vibrations superimposed on the feed flow, in every moment to the same extent and for their effectiveness optimal conditions for loading the cleaners just not possible.
  • DE-A-29 26 751 shows a device for the excretion of Foreign matter from pulp suspensions, at a central distribution facility is provided with an inlet for the pulp suspension, wherein the flow of the distribution device a plurality of on one level Has distributor connections arranged above the inlet, which the Stock suspension essentially transverse to the vertical axis of the distributor device over a corresponding number of connecting lines in the Cleaning devices, which are vertebral sifters.
  • the pulp suspension gets undamped into the spine separators, in which the heavy substances in the lower area of the spinal sifter are withdrawn and the air bubbles over discharge channels with a very small diameter in the upper one End of the vortex sifter being pulled off while the crop flows into one arranged radially outer collecting area above the vortex classifier be dissipated.
  • the flow behavior can be the fiber suspension as a non-Newtonian liquid get under control to the extent that fluctuations in grinding degree and Density is evenly given to the spinal separator, creating some Initial parameters of cleaning for all vertebral sifters will be comparable.
  • the result of the cleaning changes with the amount of the pressure difference Inlet - outlet in the spinal sifter.
  • DE-A-41 14 668 describes the headbox of a paper machine, the distribution of the pulp suspension in the frontal area of the wet end for example on a fourdrinier wire, which fourdrinier wire the fiber suspension distributed over the surface at an adjustable speed promotes and this withdraws in the further water.
  • the known Headbox includes a distributor, which distributes the stock suspension via distribution lines feeds to a screening plant. The vibrations of the stock suspension are via an air cushion in the distributor, its level and air pressure per Valve is adjustable, damped.
  • the inventive method has the advantage that under Taking into account the non-Newtonian properties of a Fiber or pulp suspension the distribution of the inflow of Suspension under the same conditions for all cleaners both in terms of the inlet pressure of the cleaners as well with regard to parameters such as consistency and degree of grinding for the In the event of changes occurring over time Parameter. This is for the according to the invention Process loaded cleaner created the prerequisite that these always with optimal selectivity and with the best possible Efficiency level work.
  • Vibrations - induced by certain components of the Paper machine such as pumps - as far as possible to dampen and thus the performance of the cleaner to be able to make better use of it is suggested to have a vibration-dampening effect on the fiber suspension. This can be done before the feed flow is divided into Partial flows or also take place afterwards, but preferably according to Claim 4 during the division of the feed stream into the Partial flows.
  • the invention proposes a device for performing of the method according to the invention in front.
  • the drawing shows a distributor 1 for the to be processed or fiber suspension to be cleaned.
  • the distributor 1 has in its basic structure - namely with regard to its damping effect - a certain similarity to that for a liquid flow provided damping device, as in the German patent specification 26 35 360 C3 is described.
  • the too cleaning or processing fiber suspension is the Distributor 1 fed from below via an inlet 2.
  • To the Inlet 2 of the distributor 1 closes at the top diffuser-like expanding transition part 3, which in a cylindrical container 4 merges.
  • a perforated plate Between the transition part 3 and the container 4 of the distributor 1 is in its interior known a perforated plate, not shown provided that together with a in the container 4 under a predetermined pressure held air cushion 5 vibration damping to the fiber suspension in container 4 with acts on the liquid level 6.
  • Levels 7 of the distributor 1 are in a horizontal plane lying connections 8 provided on the distributor 1, of which one line 9 each to the input 10 of one of several, expediently the number of connections 8 on the distributor 1 corresponding number of in the following as cleaner 11 designated hydrocyclones leads.
  • the connections 8 are preferably approximately in a star shape around the container 4 of advantage 1 arranged around this.
  • the cleaners 11 each have an outlet 12 for the accept and a further outlet 13 for the so-called rejects (Bad substance). While at the outputs 12 of the cleaner 11 Acceptable substance lines 14 are connected to the inputs 15 one preferably designed as a cyclone, all cleaners 11 lead common collection container 16 for the accepted material, are the outputs 13 of the cleaners 11 via bad substance lines 17 connected to a manifold 18 for the bad substance.
  • the compact anyway, in close proximity to the cleaners 11 arranged collection container 16 for the accepted material is for reasons a space-saving structure, preferably directly on the Container 4 of the distributor 1 attached.
  • a drain line 19 for the accept that does not shown, other components of the paper machine system or the like, possibly leads to another corresponding one Cleaner arrangement for further processing of the accepted material the fiber suspension.
  • At the reservoir 16 is also useful one going out centrally at the upper end of the collecting container Line 20 is provided, the withdrawal of the so-called light material, possibly also any air contained in the accept serves.
  • the device according to the invention expediently about ring-shaped manifold 18 for the bad substance has an input 21, which does not have another shown line in a conventional manner dilution water is fed.
  • the one with the dilution water diluted pollutant is over the designated 22 Output of the manifold 18 e.g. another, the above-described cleaner arrangement corresponding cleaner arrangement fed for further processing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Claims (14)

  1. Procédé de séparation en continu de substances désirables et indésirables dans une suspension de substances, dans lequel
    un courant d'arrivée de la suspension de fibres est envoyé dans une zone centrale de distribution (4) et y est réparti simultanément en plusieurs courants partiels au moins approximativement égaux,
    ces courants partiels subissent alors chacun pour soi une opération de nettoyage, dans laquelle, par une opération de séparation reposant sur l'exploitation de la force centrifuge, un courant de substances bonnes contenant les substances désirées et un courant de substances mauvaises contenant les substances indésirables sont formés à partir des courants partiels, et
    les courants de substances bonnes et les courants de substances mauvaises sont ensuite réunis dans une zone de collecte (16 ; 18) à chaque fois,
       caractérisé par l'application d'une action d'amortissement des vibrations sur la suspension de substances au moyen d'un coussin d'air (5) maintenu sous pression dans la zone de distribution (4).
  2. Procédé selon la revendication 1, caractérisé en ce que la pression du courant d'arrivée dans la zone de distribution (4) est maintenue à un niveau constant par régulation de la pression du coussin d'air (5).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les courants de substances bonnes sont réunis simultanément pour former un courant de sortie commun.
  4. Procédé selon la revendication 3, caractérisé en ce que les substances légères et l'air contenus dans les courants de substances bonnes sont éliminés de la substance bonne après réunion des courants de substances bonnes.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les courants de substances bonnes sont réunis simultanément pour former un courant de sortie commun, sont mis en tourbillon et les substances légères et l'air sont éliminés au centre du tourbillon.
  6. Dispositif de séparation en continu de substances désirables et indésirables dans une suspension de substances, comprenant
    un distributeur central (1), avec un récipient (4) dont la sortie présente une pluralité de raccords de distributeur (8) débouchant à une hauteur au-dessus d'une ouverture d'arrivée (2) et transversalement à l'axe vertical du récipient (4),
    une pluralité de dispositifs de nettoyage (11) disposés en étoile autour du distributeur (1), par exemple des centrifugeurs, des filtres à tourbillon et analogues, qui sont également qualifiés de cleaner, et
    une pluralité, en nombre correspondant à celui des dispositifs de nettoyage (11), de conduites de raccordement (9) au moins approximativement similaires, par lesquelles les dispositifs de nettoyage (11) sont reliés chacun à un raccord (8) du distributeur (1),
    caractérisé en ce que le distributeur (1) présente un dispositif d'amortissement, comprenant une plaque perforée placée au-dessus de l'ouverture d'arrivée (2) et au-dessous des raccords de distributeur (8) dans le récipient (4) et des moyens (5) pour maintenir une pression prédéterminée d'un volume d'air se trouvant dans le récipient (4) au-dessus de la surface du liquide à niveau régulé, la sortie du distributeur (1) étant placée au-dessous de la surface du liquide (6).
  7. Dispositif selon la revendication 6, caractérisé en ce que les conduites de substances bonnes (14) sortant des dispositifs de nettoyage (9) et acheminant la suspension de fibres nettoyée débouchent dans un récipient de collecte (16) commun.
  8. Dispositif selon la revendication 7, caractérisé en ce que les conduites de substances bonnes (14) débouchent approximativement tangentiellement dans le récipient de collecte (16) de section approximativement ronde.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que le distributeur (1) et le récipient de collecte (16) forment une unité constructive.
  10. Dispositif selon la revendication 7 à 11, caractérisé en ce que le récipient de collecte (16) est placé sur le dispositif de distribution et d'amortissement (1).
  11. Dispositif selon la revendication 7 à 10, caractérisé en ce qu'une conduite de substances légères et d'air (20) débouche dans le récipient de collecte (16).
  12. Dispositif selon la revendication 6 à 11, caractérisé en ce que les conduites de raccordement (9) conduisant du distributeur (1) aux dispositifs de nettoyage (11) peuvent être fermées chacune par une vanne (23).
  13. Dispositif selon la revendication 6 à 13, caractérisé en ce que la pression du coussin d'air (5) au-dessus du niveau de liquide (6) dans le distributeur (1) est réglable par l'intermédiaire d'une commande.
  14. Dispositif selon la revendication 6 à 13, caractérisé en ce que les courants de substances mauvaises partant des dispositifs de nettoyage (9) débouchent dans un volume de collecte commun (18).
EP94117139A 1993-12-11 1994-10-29 Procédé et dispositif pour la séparation en continu de substances désirables et indésirables dans une suspension de fibres Expired - Lifetime EP0658648B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4342289A DE4342289A1 (de) 1993-12-11 1993-12-11 Verfahren und Vorrichtung zum kontinuierlichen Trennen von in einer Stoffsuspension enthaltenen erwünschten von unerwünschten Stoffen
DE4342289 1993-12-11

Publications (3)

Publication Number Publication Date
EP0658648A2 EP0658648A2 (fr) 1995-06-21
EP0658648A3 EP0658648A3 (fr) 1996-02-07
EP0658648B1 true EP0658648B1 (fr) 2000-01-12

Family

ID=6504752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117139A Expired - Lifetime EP0658648B1 (fr) 1993-12-11 1994-10-29 Procédé et dispositif pour la séparation en continu de substances désirables et indésirables dans une suspension de fibres

Country Status (2)

Country Link
EP (1) EP0658648B1 (fr)
DE (2) DE4342289A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19637031A1 (de) * 1996-09-12 1998-03-19 Boltersdorf Hans Joachim Verfahren zur Behandlung von Reststoffen, insbesondere Rejekten aus Pulperentsorgungssystemen oder Endstufensortierern, und Vorrichtung zur Durchführung des Verfahrens
DE29916596U1 (de) * 1999-09-21 2000-01-05 Voith Sulzer Papiertechnik Patent GmbH, 88213 Ravensburg Hydrozyklonanlage
JP2008532743A (ja) 2005-03-10 2008-08-21 レファエル アハロン， 下水汚泥から繊維をリサイクルする方法およびその手段
US8617281B2 (en) 2007-08-13 2013-12-31 Applied Cleantech, Inc Methods and systems for feedstock production from sewage and product manufacturing therefrom
WO2023285216A1 (fr) * 2021-07-12 2023-01-19 Voith Patent Gmbh Hydrocyclone pour le traitement de fibres
DE102021117902A1 (de) * 2021-07-12 2023-01-12 Voith Patent Gmbh Hydrozyklone-Anordnung zum Zentrifugalabscheiden von Feststoffen aus einer Suspension

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5512831A (en) * 1978-07-06 1980-01-29 Oishi Kikai Seisakusho Kk Debris sorting apparatus from paper making stock
DE4114668C2 (de) * 1991-05-06 1995-10-26 Schultz Hans Joachim Dr Ing Verfahren zur Flächengewichts-Querprofilregelung in einem Blattbildungssystem und Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE59409073D1 (de) 2000-02-17
DE4342289A1 (de) 1995-06-14
EP0658648A3 (fr) 1996-02-07
EP0658648A2 (fr) 1995-06-21

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