EP0279022B1 - Process and installation for pulping paper stock - Google Patents

Process and installation for pulping paper stock Download PDF

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Publication number
EP0279022B1
EP0279022B1 EP87114370A EP87114370A EP0279022B1 EP 0279022 B1 EP0279022 B1 EP 0279022B1 EP 87114370 A EP87114370 A EP 87114370A EP 87114370 A EP87114370 A EP 87114370A EP 0279022 B1 EP0279022 B1 EP 0279022B1
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EP
European Patent Office
Prior art keywords
mixer
paper stock
opening
consistency
unit according
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
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EP87114370A
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German (de)
French (fr)
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EP0279022A1 (en
Inventor
Jochen Krebs
Heinrich Lang
Wolfgang Dr. Siewert
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Sulzer Escher Wyss GmbH
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Sulzer Escher Wyss GmbH
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Priority to AT87114370T priority Critical patent/ATE67254T1/en
Publication of EP0279022A1 publication Critical patent/EP0279022A1/en
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    • 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 method according to the preamble of claim 1 and a system for carrying out the method according to the preamble of claim 7.
  • high consistency pulper with the connected dilution devices work overall with interruptions, each time after processing a filling of the high-consistency detergent, the latter is emptied, and after the content has been diluted and possibly cleaned, a new filling is processed.
  • the invention aims to provide a method of the type mentioned which is suitable for continuous work.
  • the method according to claims 4 to 6 is suitable for contaminated raw materials, such as waste paper.
  • Claims 7 to 16 relate to the plant for carrying out the method, and they relate to particularly advantageous and novel details.
  • FIG. 1 shows a system which contains a high-consistency pulper 1 and a mixer 2.
  • the high consistency pulper 1 contains two dissolving elements 5 and 6 driven by motors 3 and 4.
  • the mixer 2 contains a mixing element 8 driven by a motor 7, e.g. a stirring propeller. Behind the mixing element 8 there is a sieve 10, which delimits an accepting material space 11, from which an outlet line 12 with a pump 13 leads outwards from the system.
  • the pulper 1 and the mixer 2 are connected by an opening 14 in the lower region of the wall 15 of the high-consistency pulper.
  • the water supply from a line 9 is designated W, the supply of undissolved substance with B.
  • 1 bale B of the undissolved substance with the appropriate amount of water is fed into the high-consistency pulper, so that when the pulp is dissolved, the consistency of the partially dissolved pulp is 10 to 20%. With this consistency, the paper stock is crumbly, i.e. not pumpable with centrifugal pumps.
  • the system according to FIG. 2 serves to dissolve contaminated raw material, e.g. Waste paper.
  • the system according to FIG. 2 is provided with a cleaning circuit which contains a schematically illustrated sieving device 20, e.g. a drum screen with collecting pan 21 for the continuous material and an overflow 22 for the overflow material, which is separated out and deposited.
  • a schematically illustrated sieving device 20 e.g. a drum screen with collecting pan 21 for the continuous material and an overflow 22 for the overflow material, which is separated out and deposited.
  • the screening device 20 is connected to the mixer 2 by a line 23.
  • a line 24 leads from the collecting trough 21 back into the high-consistency solver 1.
  • a line 25 connects the drip pan 21 with an accept material space 26 of the high-consistency fabric solver 1. This is formed in a manner known per se behind a sieve 27, along which the arms of the dissolving member 5 move during operation.
  • An outlet line 28 with a pump 30 leads outward from the accepted substance space 26.
  • the pulp suspension is fed from the interior of the mixer 2 to the screening device 20, in which the existing impurities, such as plastic films, etc., are excreted.
  • the cleaned pulp suspension was fed through line 25 to the accept material space 26 and serves to dilute crumbly fibrous material which passes from the high-consistency material dissolver 1 into the accept material space 26 through the sieve 27.
  • the pulp suspension obtained is discharged through line 28.
  • the system shown in FIG. 2 can be operated in such a way that the part of the sieve pass of the sieve device 20 which is returned through the line 24 into the high-consistency pulp solver represents its only supply of water which serves to dissolve the bales B.
  • the excess sieve pass ie the diluted pulp suspension, passes through line 25 into the accept material space 26 and out of this through line 28 as accept material to the outside.
  • Water can be added as required through a connection 29, a centrifugal pump 30 ensuring good mixing of the water with the paper stock suspension from line 25 and with the diluted, originally crumbly material which has passed through the sieve 27 into the accept material room 26 .
  • the housing 16 of the mixer 2 at the location of the opening 14 has a larger diameter E than the diameter D of the opening 14.
  • an annular flow of the already diluted paper stock suspension around the crumbly material penetrating through the opening 14 is formed, which is thereby prevented from flowing back into the high-consistency pulp remover 1.
  • the housing 16 is designed such that it tapers away conically from the opening 14. This supports a circulating flow in the housing 16 in its axial plane.
  • the mixer 2 is preferably firmly connected to the high consistency pulper 1 as a mechanical unit, e.g. by welding the housing 16 to the housing 15 of the pulper 1.
  • the size of the opening 14 is selected so that it allows the installation and removal of the mixing element 8 and, in the embodiment according to FIG. 1, of the sieve 10 from the pulper 1 allows.
  • FIGS. 3 and 4 show possibilities for controlling the movement of the crumbly substance from the material dissolver 1 into the mixer 2.
  • the opening 14 is assigned an adjustable flap K, which, depending on its position, more or less supports the movement by deflecting a larger or smaller part of the circulating flow U into the opening 14, or the flow from the pulper 1 in the mixer 2 brakes (position K ⁇ in Figure 3).
  • an opening screw S is assigned to the opening 14, which can run faster or slower as required and thus accelerates or slows down the flow from the pulper 1 into the mixer 2.
  • this figure shows a mixer 2 with a vertical axis, which can also be provided within the scope of the invention.
  • the second dissolving element 6, which supports the circulating flow of the crumbly substance and is shown in FIGS. 1 and 2, can be omitted.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

The high-consistency pulper (1) is connected to a mixer (2) through an opening (14) in the wall (15). Paper stock in crumb form continuously penetrates through the opening (14) into the mixer (2) where the stock is diluted to a lower and pumpable consistency. A cleaning circulation loop, for example with a drum screen (20), can be provided, in which impurities are removed from the plant. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Patentanspruches 1 sowie eine Anlage zur Ausführung des Verfahrens nach dem Oberbegriff des Patentanspruches 7.The invention relates to a method according to the preamble of claim 1 and a system for carrying out the method according to the preamble of claim 7.

Die bisher bekannten (siehe z.B. FR-A-2 529 593), im Stoffdichtenbereich von 10 bis 20% tätigen Hochkonsistenz-Stofflöser mit den angeschlossenen Verdünnungsvorrichtungen,z.B. nach der Art von Niedrigkonsistenz-Stofflösern, arbeiten gesamthaft mit Unterbrüchen, wobei jeweils nach dem Verarbeiten einer Füllung des Hochkonsistenz-Stofflösers dieser geleert, und nach der Verdünnung des Inhaltes und eventueller Reinigung eine neue Füllung verarbeitet wird.The previously known (see e.g. FR-A-2 529 593), high consistency pulper with the connected dilution devices, e.g. according to the type of low-consistency detachers, work overall with interruptions, each time after processing a filling of the high-consistency detergent, the latter is emptied, and after the content has been diluted and possibly cleaned, a new filling is processed.

Eine derartige Arbeit ist umständlich und die Betätigung verschiedener Absperrorgane nacheinander kompliziert. Dabei ist die Anlage schlecht ausgenützt, da sich jeweils zwischen den einzelnen Füllungen Totzeiten ergeben.Such work is cumbersome and the operation of various shut-off devices one after the other complicated. The system is underutilized because there are dead times between the individual fillings.

Die Erfindung hat die Schaffung eines Verfahrens der erwähnten Art zum Ziel, welche zur kontinuierlichen Arbeit geeignet ist.The invention aims to provide a method of the type mentioned which is suitable for continuous work.

Dieses Ziel wird durch die Massnahme nach dem Kennzeichen des Patentanspruches 1 erreicht.This goal is achieved by the measure according to the characterizing part of patent claim 1.

Nach Patentanspruch 2 wird eine besonders vorteilhafte Arbeitsweise des Mischers erzielt.According to claim 2, a particularly advantageous operation of the mixer is achieved.

Das Verfahren nach den Patentansprüchen 4 bis 6 ist für verunreinigte Rohstoffe, z.B. Altpapier, geeignet.The method according to claims 4 to 6 is suitable for contaminated raw materials, such as waste paper.

Die Patentansprüche 7 bis 16 beziehen sich auf die Anlage zur Ausführung des Verfahrens, wobei sie besonders vorteilhafte und neuartige Einzelheiten betreffen.Claims 7 to 16 relate to the plant for carrying out the method, and they relate to particularly advantageous and novel details.

Die Erfindung wird im folgenden anhand der Zeichnung schematisch dargestellter Ausführungsbeispiele erläutert, wobei in den Figuren einander entsprechende Teile mit gleichen Bezugszeichen bezeichnet sind. Es zeigen:

Fig.1
eine erfindungsgemässe Anlage zur Behandlung von sauberem Papierstoff, z.B. Zellulose,
Fig.2
eine Anlage mit einem Reinigungskreislauf, die zur Behandlung von verunreinigtem Rohstoff, z.B. Altpapier, geeignet ist und
die Figuren 3 und 4
zwei Möglichkeiten der Steuerung des Flusses des krümeligen Papierstoffes vom Hochkonsistenz-Stofflöser in den Mischer.
The invention is explained below with the aid of schematically illustrated exemplary embodiments, parts which correspond to one another in the figures being designated by the same reference symbols. Show it:
Fig. 1
a system according to the invention for the treatment of clean paper stock, for example cellulose,
Fig. 2
a system with a cleaning cycle, which is suitable for the treatment of contaminated raw material, eg waste paper, and
Figures 3 and 4
two ways to control the flow of crumbly paper stock from the high consistency pulper to the mixer.

In der Figur 1 ist eine Anlage dargestellt, welche einen Hochkonsistenz-Stofflöser 1 sowie einen Mischer 2 enthält. Der Hochkonsistenz-Stofflöser 1 enthält zwei durch Motoren 3 und 4 angetriebene Auflöseorgane 5 und 6. Der Mischer 2 enthält ein durch einen Motor 7 angetriebenes Mischorgan 8, z.B. einen Rührpropeller. Hinter dem Mischorgan 8 befindet sich ein Sieb 10, das einen Gutstoffraum 11 begrenzt, aus welchem eine Ausgangsleitung 12 mit einer Pumpe 13 aus der Anlage nach aussen führt.FIG. 1 shows a system which contains a high-consistency pulper 1 and a mixer 2. The high consistency pulper 1 contains two dissolving elements 5 and 6 driven by motors 3 and 4. The mixer 2 contains a mixing element 8 driven by a motor 7, e.g. a stirring propeller. Behind the mixing element 8 there is a sieve 10, which delimits an accepting material space 11, from which an outlet line 12 with a pump 13 leads outwards from the system.

Der Stofflöser 1 und der Mischer 2 sind durch eine Oeffnung 14 im unteren Bereich der Wand 15 des HochkonsistenzStofflösers verbunden. Die Wasserzufuhr aus einer Leitung 9 ist mit W bezeichnet, die Zufuhr nicht aufgelösten Stoffes mit B.The pulper 1 and the mixer 2 are connected by an opening 14 in the lower region of the wall 15 of the high-consistency pulper. The water supply from a line 9 is designated W, the supply of undissolved substance with B.

Im Betrieb werden in den Hochkonsistenz-Stofflöser 1 Ballen B des nicht aufgelösten Stoffes mit der entsprechenden Menge Wasser zugeführt, so dass sich beim Auflösen eine Konsistenz des teilweise aufgelösten Papierstoffes von 10 bis 20% ergibt. Der Papierstoff ist bei dieser Konsistenz krümelig, d.h. mit Kreiselpumpen nicht pumpfähig.In operation, 1 bale B of the undissolved substance with the appropriate amount of water is fed into the high-consistency pulper, so that when the pulp is dissolved, the consistency of the partially dissolved pulp is 10 to 20%. With this consistency, the paper stock is crumbly, i.e. not pumpable with centrifugal pumps.

Bei der Umwälzbewegung im Sinne der Pfeile U im Hochkonsistenz-Stofflöser 1 bildet sich in der Oeffnung 14 ein Pfropfen des krümeligen Stoffes, welcher in den Mischer 2 vordringt. Durch Zufuhr von Verdünnungswasser bei einer Bewegung des Mischorganes 8 wird der im Mischer 2 befindliche Teil auf eine pumpfähige Konsistenz von ca 3 bis 6% verdünnt. Diese Papierstoffsuspension gelangt durch das Sieb 10 in den Gutstoffraum 11 und wird aus diesem durch die Leitung 12 und die Pumpe 13 zur weiteren Behandlung abgeleitet.During the circulating movement in the direction of arrows U in the high-consistency pulp remover 1, a plug of the crumbly substance forms in the opening 14 and penetrates into the mixer 2. By adding dilution water when the mixing element 8 is moved, the part located in the mixer 2 is diluted to a pumpable consistency of approximately 3 to 6%. This paper stock suspension passes through the sieve 10 into the accept material space 11 and is derived therefrom through the line 12 and the pump 13 for further treatment.

Während die Anlage nach der Figur 1 zur Behandlung von sauberem Stoff dient, welcher keine grösseren Verunreinigungen enthält, wie z.B. Zellulose, so dient die Anlage nach der Figur 2 zur Auflösung von verunreinigtem Rohstoff, z.B. Altpapier.While the plant according to FIG. 1 is used for the treatment of clean material which does not contain any major impurities, e.g. Cellulose, the system according to FIG. 2 serves to dissolve contaminated raw material, e.g. Waste paper.

Zu diesem Zweck ist die Anlage nach der Figur 2 mit einem Reinigungskreislauf versehen, welcher eine schematisch dargestellte Siebvorrichtung 20 enthält, z.B. ein Trommelsieb mit Auffangwanne 21 für den Durchlaufstoff und einem Ueberlauf 22 für den Ueberlaufstoff, welcher ausgeschieden und deponiert wird.For this purpose, the system according to FIG. 2 is provided with a cleaning circuit which contains a schematically illustrated sieving device 20, e.g. a drum screen with collecting pan 21 for the continuous material and an overflow 22 for the overflow material, which is separated out and deposited.

Die Siebvorrichtung 20 ist, wie dargestellt, durch eine Leitung 23 an den Mischer 2 angeschlossen. Aus der Auffangwanne 21 führt eine Leitung 24 in den HochkonsistenzStofflöser 1 zurück. Eine Leitung 25 verbindet die Auffangwanne 21 mit einem Gutstoffraum 26 des Hochkonsistenz-Stofflösers 1. Dieser ist in an sich bekannter Weise hinter einem Sieb 27 ausgebildet, entlang welchem sich im Betrieb die Arme des Auflöseorganes 5 bewegen. Aus dem Gutstoffraum 26 führt eine Ausgangsleitung 28 mit einer Pumpe 30 nach aussen.As shown, the screening device 20 is connected to the mixer 2 by a line 23. A line 24 leads from the collecting trough 21 back into the high-consistency solver 1. A line 25 connects the drip pan 21 with an accept material space 26 of the high-consistency fabric solver 1. This is formed in a manner known per se behind a sieve 27, along which the arms of the dissolving member 5 move during operation. An outlet line 28 with a pump 30 leads outward from the accepted substance space 26.

Im Betrieb wird durch die Pumpwirkung des Mischorganes 8 des Mischers 2 die Papierstoffsuspension aus dem Innenraum des Mischers 2 der Siebvorrichtung 20 zugeführt, in welcher die vorhandenen Verunreinigungen, wie Plasticfolien usw., ausgeschieden werden. Die gereinigte Papierstoffsuspension wurd durch die Leitung 25 dem Gutstoffraum 26 zugeführt und dient zur Verdünnung von krümeligem Faserstoff, welcher aus dem Hochkonsistenz-Stofflöser 1 in den Gutstoffraum 26 durch das Sieb 27 gelangt. Die gewonnene Papierstoffsuspension wird durch die Leitung 28 abgeleitet.In operation, due to the pumping action of the mixing element 8 of the mixer 2, the pulp suspension is fed from the interior of the mixer 2 to the screening device 20, in which the existing impurities, such as plastic films, etc., are excreted. The cleaned pulp suspension was fed through line 25 to the accept material space 26 and serves to dilute crumbly fibrous material which passes from the high-consistency material dissolver 1 into the accept material space 26 through the sieve 27. The pulp suspension obtained is discharged through line 28.

Die in der Figur 2 dargestellte Anlage kann so betrieben werden, dass der Teil des Siebdurchlaufes der Siebvorrichtung 20, welcher durch die Leitung 24 in den Hochkonsistenz-Stofflöser zurückgeführt wird, dessen einzige Zufuhr von Wasser darstellt, das zur Auflösung der Ballen B dient. Der überschüssige Siebdurchlauf, d.h. die verdünnte Papierstoffsuspension gelangt durch die Leitung 25 in den Gutstoffraum 26 und aus diesem durch die Leitung 28 als Gutstoff nach aussen. Wasser kann nach Bedarf durch einen Anschluss 29 zugesetzt werden, wobei eine Kreiselpumpe 30 für eine gute Vermischung des Wassers mit der Papierstoffsuspension aus der Leitung 25 und mit dem verdünnten, ursprünglich krümeligen Stoff, welcher durch das Sieb 27 in den Gutstoffraum 26 gelangt ist, sorgt.The system shown in FIG. 2 can be operated in such a way that the part of the sieve pass of the sieve device 20 which is returned through the line 24 into the high-consistency pulp solver represents its only supply of water which serves to dissolve the bales B. The excess sieve pass, ie the diluted pulp suspension, passes through line 25 into the accept material space 26 and out of this through line 28 as accept material to the outside. Water can be added as required through a connection 29, a centrifugal pump 30 ensuring good mixing of the water with the paper stock suspension from line 25 and with the diluted, originally crumbly material which has passed through the sieve 27 into the accept material room 26 .

Wie aus den Figuren 1 und 2 hervorgeht, hat das Gehäuse 16 des Mischers 2 an der Stelle der Oeffnung 14 einen grösseren Durchmesser E als der Durchmesser D der Oeffnung 14 ist. Dadurch kann sich unter dem Einfluss des Mischorganes 8 eine Ringströmung der bereits verdünnten Papierstoffsuspension um den durch die Oeffnung 14 vordringenden krümeligen Stoff ausbilden, welche dadurch am Rückfluss in den Hochkonsistenz-Stofflöser 1 gehindert wird.As can be seen from FIGS. 1 and 2, the housing 16 of the mixer 2 at the location of the opening 14 has a larger diameter E than the diameter D of the opening 14. As a result, under the influence of the mixing element 8, an annular flow of the already diluted paper stock suspension around the crumbly material penetrating through the opening 14 is formed, which is thereby prevented from flowing back into the high-consistency pulp remover 1.

Weiter ist das Gehäuse 16 so ausgebildet, dass es sich konisch weg von der Oeffnung 14 verjüngt. Dadurch wird eine Umwälzströmung im Gehäuse 16 in dessen axialer Ebene unterstützt.Furthermore, the housing 16 is designed such that it tapers away conically from the opening 14. This supports a circulating flow in the housing 16 in its axial plane.

Der Mischer 2 ist vorzugsweise mit dem Hochkonsistenz-Stofflöser 1 als maschinenbauliche Einheit fest verbunden, z.B. durch Anschweissen des Gehäuses 16 an das Gehäuse 15 des Stofflösers 1. Zu diesem Zweck ist die Grösse der Oeffnung 14 so gewählt, dass sie den Ein- und Ausbau des Mischorganes 8 und bei der Ausführung nach Fig.1 auch des Siebes 10 aus dem Stofflöser 1 zulässt.The mixer 2 is preferably firmly connected to the high consistency pulper 1 as a mechanical unit, e.g. by welding the housing 16 to the housing 15 of the pulper 1. For this purpose, the size of the opening 14 is selected so that it allows the installation and removal of the mixing element 8 and, in the embodiment according to FIG. 1, of the sieve 10 from the pulper 1 allows.

Die Figuren 3 und 4 zeigen Möglichkeiten der Steuerung der Bewegung des krümeligen Stoffes aus dem Stofflöser 1 in den Mischer 2.FIGS. 3 and 4 show possibilities for controlling the movement of the crumbly substance from the material dissolver 1 into the mixer 2.

Nach der Figur 3 ist der Oeffnung 14 eine verstellbare Klappe K zugeordnet, welche je nach ihrer Stellung die Bewegung mehr oder weniger unterstützt, indem sie einen grösseren oder kleineren Teil der Umwälzströmung U in die Oeffnung 14 umlenkt, bzw. die Strömung vom Stofflöser 1 in den Mischer 2 bremst (Stellung Kʹ in der Figur 3).According to FIG. 3, the opening 14 is assigned an adjustable flap K, which, depending on its position, more or less supports the movement by deflecting a larger or smaller part of the circulating flow U into the opening 14, or the flow from the pulper 1 in the mixer 2 brakes (position Kʹ in Figure 3).

Nach der Figur 4 ist der Oeffnung 14 eine Förderschnecke S zugeordnet, die nach Bedarfschneller oder langsamer laufen kann und damit die Strömung aus dem Stofflöser 1 in den Mischer 2 beschleunigt oder verlangsamt.According to FIG. 4, an opening screw S is assigned to the opening 14, which can run faster or slower as required and thus accelerates or slows down the flow from the pulper 1 into the mixer 2.

Ausserdem ist in dieser Figur ein Mischer 2 mit vertikaler Achse dargestellt, der ebenfalls im Rahmen der Erfindung vorgesehen werden kann.In addition, this figure shows a mixer 2 with a vertical axis, which can also be provided within the scope of the invention.

Das zweite Auflöseorgan 6, welches die Umwälzströmung des krümeligen Stoffes unterstützt und in den Figuren 1 und 2 dargestellt ist, kann im Prinzip entfallen.In principle, the second dissolving element 6, which supports the circulating flow of the crumbly substance and is shown in FIGS. 1 and 2, can be omitted.

Claims (16)

  1. Process for disintegrating paper stock in a high-consistency pulper and subsequent dilution apparatus, characterised in that the paper stock having a crumbly consistency, which is disintegrated in water in the high-consistency pulper (1), continuously advances through a connecting opening (14) into a mixer (2) with a mixing element (8), is mixed and diluted with the continuous supply of dilution water and is continuously passed on out of the mixer (2).
  2. Process according to Claim 1, characterised in that the opening (14) and the mixer (2) are constructed so that a ring of the low-consistency paper stock suspension can form around the advancing crumbly stock, which suspension is prevented from flowing back into the high-consistency pulper by the advancing stock.
  3. Process according to Claim 1 or 2, characterised in that the diluted paper stock suspension is drawn off from the mixer (2) via a screen (10).
  4. Process according to Claim 1 or 2, characterised in that the diluted paper stock suspension from the mixer (2) is continuously supplied to a screen device (20) in which impurities are separated ready for dumping as screen overflow.
  5. Process according to Claim 4, characterised in that the paper stock suspension which has passed through the screen device (20) as screenings serves for the dilution of crumbly paper stock which passes through a screen (27) located in the high-consistency pulper and into an accepted stock chamber (26) from which the resulting paper stock suspension is drawn off.
  6. Process according to Claim 4 or 5, characterised in that the paper stock suspension which has passed through the screen device (20) as screenings is used for disintegrating paper stock in the high-consistency pulper (1).
  7. Unit for disintegrating paper stock for performing the process according to Claim 1 with a high-consistency pulper and subsequent dilution apparatus, characterised in that a mixer (2) with a mixing element (8) and a supply line (9) for dilution water is connected to the high-consistency pulper (1) via an opening (14) made in the wall (15) of the high-consistency pulper (1).
  8. Unit according to Claim 7, characterised in that the size of the opening (14) permits the mixing element (8) to be installed and removed.
  9. Unit according to Claim 7 or 8, characterised in that the housing (16) of the mixer (2) at the point of the opening (14) has a larger diameter (E) than the diameter (D) of the opening (14).
  10. Unit according to Claim 9, characterised in that the housing (16) of the mixer (2) tapers conically away from the opening.
  11. Unit according to Claim 7, characterised in that the mixer (2) has a screen (10) and an accepted stock chamber (11) located thereafter, the discharge line (12) of the unit leading out from this accepted stock chamber (11).
  12. Unit according to Claim 7, characterised in that a screen device (20) is connected to the mixer (2), which device is suitable for the separation, ready for dumping, of impurities (Figure 2).
  13. Unit according to Claim 12, wherein the high-consistency pulper (1) has an accepted stock chamber (26) in known manner, characterised in that the screenings side (21) of the screen device (20) is connected via a line (25) to the accepted stock chamber (26), from which the discharge line (28) leads outwards (Figure 2).
  14. Unit according to Claim 7, characterised in that the opening (14) is provided with a control means (K) for controlling the advance of the paper stock into the mixer (2).
  15. Unit according to Claim 7, characterised in that the opening (14) is provided with a conveyor device (S).
  16. Unit according to one of the preceding Claims, characterised in that the mixer (2) is connected securely to the high-consistency pulper (1) as a structural unit.
EP87114370A 1987-01-20 1987-10-01 Process and installation for pulping paper stock Expired - Lifetime EP0279022B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87114370T ATE67254T1 (en) 1987-01-20 1987-10-01 PROCESS AND PLANT FOR THE DISSOLUTION OF PAPER STOCK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH194/87 1987-01-20
CH19487 1987-01-20

Publications (2)

Publication Number Publication Date
EP0279022A1 EP0279022A1 (en) 1988-08-24
EP0279022B1 true EP0279022B1 (en) 1991-09-11

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Application Number Title Priority Date Filing Date
EP87114370A Expired - Lifetime EP0279022B1 (en) 1987-01-20 1987-10-01 Process and installation for pulping paper stock

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EP (1) EP0279022B1 (en)
AT (1) ATE67254T1 (en)
DE (2) DE3704461A1 (en)

Families Citing this family (14)

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CH681993A5 (en) * 1989-08-10 1993-06-30 Voith Gmbh J M
FI82492C (en) * 1989-08-21 1991-03-11 Tampella Oy Ab FOERFARANDE OCH ANORDNING FOER AVLAEGSNANDE AV FOERORENINGAR FRAON PAPPERSMASSA I PULPER.
FI91288C (en) * 1992-10-20 1994-06-10 Tampella Oy Valmet Mixing device in pulping
ITVI20020048A1 (en) * 2002-03-19 2003-09-19 Comer Spa PROPULSOR FOR THE STIRRING OF SUSPENSIONS OF SOLIDS INSIDE A TREATMENT TANK
GB0703053D0 (en) * 2007-02-16 2007-03-28 Ici Plc Apparatus for and Methods of Mixing and Dispensing Samples
DE102013019056A1 (en) * 2013-03-15 2014-10-02 Hans-Joachim Boltersdorf Screw press with a conveyor pipe and a method for operating a screw press
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ATE67254T1 (en) 1991-09-15
DE3772967D1 (en) 1991-10-17
EP0279022A1 (en) 1988-08-24
DE3704461A1 (en) 1988-07-28
DE3704461C2 (en) 1992-10-22

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