WO2009097877A1 - Système pour mélanger et diluer - Google Patents

Système pour mélanger et diluer Download PDF

Info

Publication number
WO2009097877A1
WO2009097877A1 PCT/EP2008/009449 EP2008009449W WO2009097877A1 WO 2009097877 A1 WO2009097877 A1 WO 2009097877A1 EP 2008009449 W EP2008009449 W EP 2008009449W WO 2009097877 A1 WO2009097877 A1 WO 2009097877A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp suspension
pulp
stream
mixing device
feed
Prior art date
Application number
PCT/EP2008/009449
Other languages
German (de)
English (en)
Inventor
Christian Bangert
Erwin Binder
Original Assignee
Voith 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 Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2009097877A1 publication Critical patent/WO2009097877A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • 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
    • D21B1/342—Mixing apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • B01F25/31323—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices used successively
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B01F25/31331—Perforated, multi-opening, with a plurality of holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • 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
    • D21F1/08—Regulating consistency

Definitions

  • the invention relates to an arrangement for diluting a pulp suspension in a dilution device and for adding a plurality of fluids via at least one feed device in the stream of pulp suspension in a machine for producing and / or finishing a paper, cardboard, tissue or other fibrous web.
  • the invention also relates to a method for diluting a pulp suspension and for adding at least two different fluids into the pulp suspension in a machine for producing and / or finishing a paper, board, tissue or another fibrous web.
  • a metering lance described in DE10317865 can not completely satisfy this yet.
  • the object of the invention is therefore to improve the mixing in such devices.
  • the object has been achieved in that at least one feed device is arranged in front of and at least one after a mixing device and the dilution device in front of the first feed device.
  • the dilution and addition of at least one fluid before the mixing device allows premixing.
  • the dilution and admixture of the fluids can be carried out after a sorter.
  • a low-wear, safe and inexpensive mixing device results when it is designed as a static mixer.
  • the length of the static mixer is greater than the largest cross-sectional dimension of the pulp suspension stream, preferably greater than 1, 5 times this cross-sectional dimension.
  • the distance between the feeder and the start of the mixing device should be at least greater than the largest cross-sectional dimension of the pulp suspension stream.
  • the distance between the feed device following the mixing device and the end of the mixing device should be at least greater than the largest cross-sectional dimension of the pulp suspension stream.
  • the dilution device is formed by at least one nozzle, which the Introduces pulp suspension in a stream of water or a pulp suspension with lower pulp concentration.
  • the nozzle is designed as a cylindrical tube, which in the stream of water or a pulp suspension with lower pulp concentration, preferably aligned in the flow direction extends.
  • the flow rate of the pulp suspension at the end of the nozzle should be at least 5 times, preferably at least 10 times and in particular at least 15 times higher than the flow of water or a pulp suspension with a lower pulp concentration.
  • the distance between the nozzle and the first feeding device should be 2 to fach times, preferably 4 to fach times, and more preferably about times the largest cross-sectional dimension of the pulp suspension stream.
  • the supply device should have a plurality of feed openings for adding the fluid into the pulp suspension. It is advantageous if a plurality of feed openings are distributed over the cross section of the pulp suspension stream.
  • a structurally simple feed device results if it is formed by at least one tubular lance immersed in the pulp suspension stream, which preferably runs perpendicular to the flow direction of the pulp suspension.
  • the static mixer should have at least one closed hollow body which dips into the pulp suspension stream.
  • the hollow body and possibly existing webs ensure good mixing.
  • the closed shape of the hollow body prevents deposits.
  • the water or the pulp suspension is supplied with a lower pulp concentration via a pipeline in which the dilution device, the mixing device and the feed devices are arranged.
  • the fluid supplied to the mixing device is supplied to a plurality of locations distributed over the cross section of the pulp suspension stream.
  • FIG. 1 shows a schematic cross section through a dilution, feed and mixing arrangement 16
  • FIG. 2a shows a schematic cross section through a static mixer
  • FIG. 2b shows a sectional area A according to FIG. 2a
  • FIG. 2c shows a sectional area B according to FIG. 2a and FIG
  • Figure 3 a system diagram of a constant part of a paper machine.
  • the pulp suspension 1 having a relatively high consistency between 3 and 3.5% is passed through a cleaning device 13 and a sorting device 14 before it is collected in a chest 15. Due to the high consistency of the material, fewer quantities of pulp suspension must be cleaned and sorted so that the devices can be made smaller.
  • the pulp suspension 1 is diluted in a dilution, feed and mixing arrangement 16 with process water to the required for the following headbox 18 fiber fraction of less than 3%. Before supplying the process water this is cleaned in a treatment device 17 and vented. This can also be omitted according to the requirements of the fibrous web.
  • the pulp suspension 1 is conducted through a pipeline 5 to a headbox 18 of a machine for producing a fibrous web, in particular a paper web.
  • two different fluids in the form of retention agents of the pulp suspension 1 are added.
  • first polyacrylamide and then bentonite could be mixed.
  • the pulp suspension 1 is diluted via mixing with process water to a value of less than 3% by weight.
  • a tubular nozzle 12 is inserted in an arc of the pipe 5, the nozzle opening points in the flow direction 6 and is located approximately in the cross-sectional center of the pulp suspension flow. While 5 process water is introduced via the pipe, passes through the nozzle 12 of the dilution device 11, the pulp suspension 1 with relatively high pulp content in this process water.
  • the flow rate of the pulp suspension 1 in the nozzle 12 is 10 times higher than the flow rate of the process water in the pipeline 5.
  • the mixing is still supported by the fact that the distance between the Nozzle 12 and the first feeding device 2 corresponds to about ⁇ times the largest cross-sectional dimension of the pulp suspension stream.
  • the admixture of the retention agent takes place via feeders 2, 3 in the form of tubular metering lances, which run transversely through the pulp suspension 1 and perpendicular to the pulp suspension flow 6.
  • metering lances is located on the lying in the flow direction 6 side of a series of supply openings 10 in the form of holes in the tube of the metering lance.
  • the pipeline 5 leads after the first feed device 2 into a mixing device 4 in the form of a static mixer. Only after the mixing device 4 is the second feeding device 3.
  • the distance between the first feeding device 2 and the beginning of the static mixer and the distance between the end of the static mixer and the feeding device 3 is greater than the inner diameter of the cylindrical pipe. 5 This distance ensures that a premixing of the first supplied fluid with the pulp suspension 1 takes place before the mixing device 4 and on the other hand, the aftereffect of the mixing device 4 can be used in a sufficient manner.
  • the static mixer shown in Figures 2a, b, c has a tubular housing 7, which is formed by the pipe 5.
  • the hollow body 8,9 are also limited here by the housing 7.
  • the static mixer in the flow direction 6 has a length that is greater than the largest cross-sectional dimension of the pulp suspension stream.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention concerne un système et un procédé utilisés pour diluer une suspension fibreuse (1) dans un dispositif de dilution (11), ainsi que pour ajouter plusieurs fluides au flux de ladite suspension fibreuse, par l'intermédiaire d'un dispositif d'alimentation (2, 3), dans une machine servant à produire et/ou à transformer une bande de papier, de carton, de papier-mouchoir ou d'une autre matière fibreuse. L'invention se caractérise en ce que le mélange intime est amélioré dans la mesure où au moins un dispositif d'alimentation (2) est disposé en amont du dispositif mélangeur (4 et au moins un dispositif d'alimentation (3) est disposé en aval du dispositif mélangeur (4) et où le dispositif de dilution (11) est monté en amont du premier dispositif d'alimentation (2)..
PCT/EP2008/009449 2008-02-08 2008-11-08 Système pour mélanger et diluer WO2009097877A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000256.9 2008-02-08
DE102008000256A DE102008000256A1 (de) 2008-02-08 2008-02-08 Misch- und Verdünnungsanordnung

Publications (1)

Publication Number Publication Date
WO2009097877A1 true WO2009097877A1 (fr) 2009-08-13

Family

ID=40342253

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/009449 WO2009097877A1 (fr) 2008-02-08 2008-11-08 Système pour mélanger et diluer

Country Status (2)

Country Link
DE (1) DE102008000256A1 (fr)
WO (1) WO2009097877A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521172A (en) * 2013-12-11 2015-06-17 Caltec Ltd Commingling device
CN110735359A (zh) * 2018-07-20 2020-01-31 玖龙纸业(天津)有限公司 一种安装在胶料管道上用于混合胶料的设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297305A (en) * 1957-08-14 1967-01-10 Willie W Walden Fluid mixing apparatus
EP0106460A1 (fr) * 1982-09-30 1984-04-25 The Black Clawson Company Méthode et appareil pour délignification à l'oxygène
JP2003053752A (ja) * 2001-08-16 2003-02-26 Konica Corp セルロースエステルフィルムの製造装置
EP1659213A2 (fr) * 2004-11-19 2006-05-24 Voith Paper Patent GmbH Caisse de tête
JP2006255552A (ja) * 2005-03-16 2006-09-28 Daio Paper Corp 流体混合装置及び漂白パルプの製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20321803U1 (de) 2003-04-09 2010-04-08 Voith Patent Gmbh Anordnung zum Zuführen einer zweiten Flüssigkeit zu einer Papierfaserstoffsuspension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3297305A (en) * 1957-08-14 1967-01-10 Willie W Walden Fluid mixing apparatus
EP0106460A1 (fr) * 1982-09-30 1984-04-25 The Black Clawson Company Méthode et appareil pour délignification à l'oxygène
JP2003053752A (ja) * 2001-08-16 2003-02-26 Konica Corp セルロースエステルフィルムの製造装置
EP1659213A2 (fr) * 2004-11-19 2006-05-24 Voith Paper Patent GmbH Caisse de tête
JP2006255552A (ja) * 2005-03-16 2006-09-28 Daio Paper Corp 流体混合装置及び漂白パルプの製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2521172A (en) * 2013-12-11 2015-06-17 Caltec Ltd Commingling device
CN110735359A (zh) * 2018-07-20 2020-01-31 玖龙纸业(天津)有限公司 一种安装在胶料管道上用于混合胶料的设备

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Publication number Publication date
DE102008000256A1 (de) 2009-08-13

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