DE422314T1 - METHOD AND DEVICE FOR PRODUCING A CELLULOSE BREAD OF IMPROVED QUALITY. - Google Patents

METHOD AND DEVICE FOR PRODUCING A CELLULOSE BREAD OF IMPROVED QUALITY.

Info

Publication number
DE422314T1
DE422314T1 DE198989850341T DE89850341T DE422314T1 DE 422314 T1 DE422314 T1 DE 422314T1 DE 198989850341 T DE198989850341 T DE 198989850341T DE 89850341 T DE89850341 T DE 89850341T DE 422314 T1 DE422314 T1 DE 422314T1
Authority
DE
Germany
Prior art keywords
hydrocyclone unit
suspension
pump
head box
main pump
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.)
Pending
Application number
DE198989850341T
Other languages
German (de)
Inventor
Nils Anders Lennart Djursholm Wikdahl
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
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8203268&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE422314(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of DE422314T1 publication Critical patent/DE422314T1/en
Pending 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
    • 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
    • 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
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Materials For Medical Uses (AREA)
  • Magnetic Record Carriers (AREA)
  • Silicon Compounds (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

In a process and a device, a cellulose suspension of thin consistency, the consistency and flow rate of which is known, is conducted to the suction side of a main pump (4), to the pressure side of which there are coupled in sequence a first multi-hydrocyclone unit (6) for cleaning out heavy impurities, a second multi-hydrocyclone unit (7) for cleaning out light impurities, and a headbox (8) for a wet machine or paper machine (9). This provides, on one hand, cleaning and pulp or paper production uninterrupted by intermediate storage, and on the other hand a thickening of the pulp in the second multi-hydrocyclone unit from a suitable consistency for cleaning to a thicker consistency suitable for spreading on a wire or the like.

Claims (15)

Aktenzeichen: 89 85 0341.2-2304 Patentansprüche :File number: 89 85 0341.2-2304 Patent claims: 1. Verfahren zur Herstellung eines Zellulosebreies verbesserter Qualität, insbesondere im Hinblick auf den Gehalt an leichten, festen Verunreinigungen, wie Teilchen aus Kunststoff u.dgl., dadurch gekennzeichnet, daß eine Fasersuspension niedriger Dichte durch eine Hauptpumpe (4) zum Durchtritt durch eine erste Multi-Hydrozykloneinheit (6) zur Abtrennung schwerer Teilchen und durch eine in den gleichen Pumpenkreis eingeschaltete zweite Multi-Hydrozykloneinheit (7) gebracht wird, um leichte Teilchen abzutrennen, wobei gleichzeitig die Breidichte während der Behandlung in der zweiten Multi-Hydrozykloneinheit (7) erhöht wird und daß wenigstens ein Teil der so behandelten Breisuspension anschließend direkt ohne Zwischenpumpen zum Kopfkasten (8) einer Entwässerungsmaschine oder Papiermaschine geleitet wird.1. Process for producing a cellulose pulp of improved quality, in particular with regard to the content of light, solid impurities, such as particles of plastic and the like, characterized in that a fiber suspension of low density is caused by a main pump (4) to pass through a first multi-hydrocyclone unit (6) for separating heavy particles and through a second multi-hydrocyclone unit (7) connected to the same pump circuit in order to separate light particles, the pulp density being increased at the same time during the treatment in the second multi-hydrocyclone unit (7) and that at least part of the pulp suspension thus treated is then fed directly without intermediate pumps to the head box (8) of a dewatering machine or paper machine. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die zur Entwässerungsmaschine oder Papiermaschine geleitete Suspension durch ein steuerbares Ventil (800) hindurchtritt, das durch einen Fühler (80I) für den Druck, die Strömung oder die Füllhöhe im Kopfkasten (8) der Entwässerungsmaschine oder Papiermaschine gesteuert wird.2. Method according to claim 1, characterized in that the suspension directed to the dewatering machine or paper machine passes through a controllable valve (800) which is controlled by a sensor (80I) for the pressure, the flow or the filling level in the head box (8) of the dewatering machine or paper machine. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Teil des gereinigt aus der zweiten Multi-Hydrozykloneinheit (7) austretenden Stromes für eine Aufnahme vor der Hauptpumpe (4) zurückgeführt wird.3. Method according to claim 1, characterized in that a part of the purified stream emerging from the second multi-hydrocyclone unit (7) is returned for collection upstream of the main pump (4). 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der zurückgeführte Strom mit Hilfe eines Ventiles (I30) geregelt wird, um den gewünschten Druck für die aus dieser4. Method according to claim 3, characterized in that the returned flow is regulated by means of a valve (I30) in order to achieve the desired pressure for the zweiten Multi-Hydrozykloneinheit kommende, gereinigte Suspension zu erreichen.to reach the purified suspension coming from the second multi-hydrocyclone unit. 5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Wiedereinführung an der Saugseite der Hauptpumpe (4) vorgesehen ist.5. Method according to claim 3, characterized in that the reintroduction is provided on the suction side of the main pump (4). 6. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Wiedereinführung an einer Auflösungsvorrichtung (300) vorgesehen ist, die in Strömungsrichtung vor der Saugseite der Hauptpumpe (4) angeordnet ist.6. Method according to claim 3, characterized in that the reintroduction is provided at a dissolving device (300) which is arranged in the flow direction upstream of the suction side of the main pump (4). 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Saugseite der Hauptpumpe (4) mit Hilfe einer zweiten Pumpe (3) eine Suspension zugepumpt wird, die hinsichtlich ihrer Strömungsrate und -dichte geregelt wird und die Saugseite der Hauptpumpe (4) mit einem Tank (10) mit regulierter Füllhöhe gekuppelt ist, der in das Weißwassersystem der Entwässerungsmaschine oder Papiermaschine eingeschaltet ist, so daß die Auflösung mit Weißwasser daraus bewirkt wird.7. Method according to claim 1, characterized in that a suspension is pumped to the suction side of the main pump (4) by means of a second pump (3), which suspension is regulated in terms of its flow rate and density, and the suction side of the main pump (4) is coupled to a tank (10) with a regulated filling level, which is connected to the white water system of the dewatering machine or paper machine, so that the dissolution is effected with white water therefrom. 8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Multi-Hydrozykloneinheit mit Hydrozyklonen mit konischen Abtrennkammern versehen ist, deren Größtdurchmesser kleiner als 125 mm und vorzugsweise kleiner als 100 mm ist und die einen Durchmesser einer Basisöffnung aufweisen, der kleiner als ein Fünftel des Größtdurchmessers der Abtrennkammer ist, sowie eine Scheitelöffnung, die größer als die Basisöffnung ist.8. Process according to claim 1, characterized in that the second multi-hydrocyclone unit is provided with hydrocyclones with conical separation chambers whose maximum diameter is less than 125 mm and preferably less than 100 mm and which have a diameter of a base opening which is less than one fifth of the maximum diameter of the separation chamber and an apex opening which is larger than the base opening. 9. Vorrichtung zur Herstellung von Zellulosebrei verbesserter Qualität, insbesondere im Hinblick auf den Gehalt an leichten, festen Verunreinigungen, wie Teilchen aus Kunststoff u.dgl., gekennzeichnet durch die Kombination einer Pumpe (4), einer ersten Multi-Hydrozykloneinheit (6)9. Device for producing cellulose pulp of improved quality, in particular with regard to the content of light, solid impurities, such as plastic particles and the like, characterized by the combination of a pump (4), a first multi-hydrocyclone unit (6) zur Abtrennung schwerer Teilchen, einer zweiten Multi-Hydrozykloneinheit (7) zur Abtrennung leichter Teilchen und des Kopfkastens (8) einer Entwässerungsmaschine oder Papiermaschine (9), die in Serie miteinander verbunden sind, wobei die zweite Multi-Hydrozykloneinheit gleichzeitig als Einrichtung zum Eindicken der gereinigten Suspension dient.for separating heavy particles, a second multi-hydrocyclone unit (7) for separating light particles and the head box (8) of a dewatering machine or paper machine (9), which are connected in series, the second multi-hydrocyclone unit simultaneously serving as a device for thickening the cleaned suspension. 10. Vorrichtung nach Anspruch 9, gekennzeichnet durch ein steuerbares Ventil (800), das zwischen der zweiten Multi-Hydrozykloneinheit (7) und dem Kopfkasten eingeschaltet' ist, und Mittel (801), die den Druck, die Strömung oder die Füllstandshöhe im Kopfkasten erfassen und durch Betätigung des Ventiles (800) steuern.10. Device according to claim 9, characterized by a controllable valve (800) which is connected between the second multi-hydrocyclone unit (7) and the head box, and means (801) which detect the pressure, the flow or the fill level in the head box and control it by actuating the valve (800). 11. Vorrichtung nach Anspruch 9 oder 10, gekennzeichnet durch eine Nebenschlußleitung (13. 13'), die zur Aufteilung der Suspension an einer Aufteilungsstelle zwischen der zweiten Multi-Hydrozykloneinheit (7) und dem Kopfkasten (8) angeschlossen ist und zu einem Einlaßpunkt führt, der der Pumpe (4) in Strömungsrichtung vorgeordnet ist.11. Device according to claim 9 or 10, characterized by a bypass line (13, 13') which is connected to a dividing point between the second multi-hydrocyclone unit (7) and the head box (8) for dividing the suspension and leads to an inlet point which is arranged upstream of the pump (4) in the direction of flow. 12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß in der Nebenschlußleitung (13, 13') ein Ventil (130) vorgesehen ist.12. Device according to claim 11, characterized in that a valve (130) is provided in the shunt line (13, 13'). 13· Vorrichtung nach Anspruch 12, gekennzeichnet durch eine Steuereinrichtung (131) » welche dazu vorgesehen ist, das Ventil (130) in Abhängigkeit vom Druck an der Aufteilungsstelle zu steuern.13· Device according to claim 12, characterized by a control device (131) » which is intended to control the valve (130) depending on the pressure at the distribution point. 14. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Nebenschlußleitung (13, 13') zu einer in Strömungsrichtung der Pumpe (4) vorgeordnete Auflösungsvorrichtung führt.14. Device according to claim 11, characterized in that the bypass line (13, 13') leads to a dissolving device arranged upstream of the pump (4) in the flow direction. 15. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die zweite Multi-Hydrozykloneinheit aus Hydrozyklonen mit konischen Trennkammern hergestellt ist, die einen größten Durchmesser von 125 mm, vorzugsweise höchstens 100 mm aufweisen und eine Basisöffnung und eine Scheitelöffnung besitzen, wobei der Öffnungsdurchmesser der Basisöffnung kleiner als ein Fünftel des Größtdurchmessers der Trennkammer und die Scheitelöffnung größer als die Basisöffnung ist.15. Device according to claim 9, characterized in that the second multi-hydrocyclone unit is made of hydrocyclones with conical separation chambers which have a largest diameter of 125 mm, preferably at most 100 mm and have a base opening and an apex opening, the opening diameter of the base opening being smaller than one fifth of the largest diameter of the separation chamber and the apex opening being larger than the base opening.
DE198989850341T 1989-10-10 1989-10-10 METHOD AND DEVICE FOR PRODUCING A CELLULOSE BREAD OF IMPROVED QUALITY. Pending DE422314T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89850341A EP0422314B1 (en) 1989-10-10 1989-10-10 A method and device for the production of cellulose pulp of improved quality

Publications (1)

Publication Number Publication Date
DE422314T1 true DE422314T1 (en) 1991-07-25

Family

ID=8203268

Family Applications (2)

Application Number Title Priority Date Filing Date
DE198989850341T Pending DE422314T1 (en) 1989-10-10 1989-10-10 METHOD AND DEVICE FOR PRODUCING A CELLULOSE BREAD OF IMPROVED QUALITY.
DE68914666T Expired - Lifetime DE68914666T2 (en) 1989-10-10 1989-10-10 Method and device for producing a cellulose pulp of improved quality.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE68914666T Expired - Lifetime DE68914666T2 (en) 1989-10-10 1989-10-10 Method and device for producing a cellulose pulp of improved quality.

Country Status (10)

Country Link
EP (1) EP0422314B1 (en)
JP (1) JPH0781240B2 (en)
AT (1) ATE104382T1 (en)
BR (1) BR9006945A (en)
CA (1) CA2042366C (en)
DD (1) DD296722A5 (en)
DE (2) DE422314T1 (en)
ES (1) ES2023626T3 (en)
NO (1) NO178348C (en)
WO (1) WO1991005912A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9317817D0 (en) * 1993-08-27 1993-10-13 Wiggins Teape Group The Ltd Papermaking process and apparatus for use therewith
DE19522761C2 (en) * 1995-06-27 2000-11-16 Voith Sulzer Papiermasch Gmbh Shoe press device
SE507386C2 (en) * 1996-09-16 1998-05-25 Alfa Laval Ab Process and plant for treating a contaminated pulp suspension
SE507387C2 (en) * 1996-09-16 1998-05-25 Alfa Laval Ab Process and plant for treating a contaminated pulp suspension
FI103734B1 (en) * 1997-11-11 1999-08-31 Ahlstrom Machinery Oy Method and apparatus for treating a fiber suspension
FI112806B (en) * 2001-03-09 2004-01-15 Metso Paper Inc A method for controlling the quality of a pulp
FI110699B (en) * 2001-08-15 2003-03-14 Metso Paper Inc Input box for paper machine or equivalent
DE10358567A1 (en) * 2003-12-15 2005-09-08 Nordland Papier Gmbh Method and device for treating a pulp
RU2708110C1 (en) * 2019-04-09 2019-12-04 Николай Васильевич Байкин Fibrous materials sorting device
CN110409212B (en) * 2019-07-19 2021-09-03 王洲 Sandwich type hand towel and production process thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912579A (en) * 1969-06-04 1975-10-14 Bergstrom Paper Co Reverse cleaning and de-inking of paper stock
USRE29472E (en) * 1971-09-29 1977-11-15 Clark & Vicario Corporation Conduit system for conveying fibrous stock from deaerator chamber to headbox in papermaking machine
US4312701A (en) * 1980-11-07 1982-01-26 Hydro-Thermal Corporation Method for defibrating waste paper and dispersing contaminants
US4437984A (en) * 1982-04-05 1984-03-20 Clark & Vicario Corporation Multiple hydrocyclone apparatus
SE435581B (en) * 1982-08-16 1984-10-08 Celleco Ab PROCEDURE FOR DIVIDING A MIXTURE OF A RELATIVELY LOWER FIBER SUSPENSION (ACCEPT) AND LIGHT POLLUTION (REJECT)
SE451736B (en) * 1983-09-19 1987-10-26 Nils Anders Lennart Wikdahl WHEN WATERING A WATER SUSPENSION CONTAINING CELLULOSA FIBERS
GB2191120B (en) * 1984-11-28 1988-12-29 Noel Carroll Cyclone separator
SU1376325A1 (en) * 1986-07-10 1990-08-23 Научно-производственное объединение по крахмалопродуктам Multistage multicyclone installation

Also Published As

Publication number Publication date
JPH0781240B2 (en) 1995-08-30
EP0422314A1 (en) 1991-04-17
JPH04502188A (en) 1992-04-16
CA2042366A1 (en) 1991-04-11
DE68914666D1 (en) 1994-05-19
WO1991005912A1 (en) 1991-05-02
CA2042366C (en) 1995-07-04
NO178348B (en) 1995-11-27
NO912197L (en) 1991-06-07
BR9006945A (en) 1991-10-08
ATE104382T1 (en) 1994-04-15
DD296722A5 (en) 1991-12-12
ES2023626A4 (en) 1992-02-01
EP0422314B1 (en) 1994-04-13
NO178348C (en) 2001-03-05
ES2023626T3 (en) 1994-07-01
DE68914666T2 (en) 1994-08-18
NO912197D0 (en) 1991-06-07

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