SE9303352L - Method and apparatus for mixing ozone-containing gas in a pulp suspension - Google Patents

Method and apparatus for mixing ozone-containing gas in a pulp suspension

Info

Publication number
SE9303352L
SE9303352L SE9303352A SE9303352A SE9303352L SE 9303352 L SE9303352 L SE 9303352L SE 9303352 A SE9303352 A SE 9303352A SE 9303352 A SE9303352 A SE 9303352A SE 9303352 L SE9303352 L SE 9303352L
Authority
SE
Sweden
Prior art keywords
pulp
suspension
rotor
gas
stator
Prior art date
Application number
SE9303352A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9303352D0 (en
SE501895C2 (en
Inventor
Rolf Ekholm
Ulf Jansson
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9303352A priority Critical patent/SE501895C2/en
Publication of SE9303352D0 publication Critical patent/SE9303352D0/en
Priority to PCT/SE1994/000955 priority patent/WO1995010351A1/en
Priority to AU79526/94A priority patent/AU7952694A/en
Publication of SE9303352L publication Critical patent/SE9303352L/en
Publication of SE501895C2 publication Critical patent/SE501895C2/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
    • B01F27/2722—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces provided with ribs, ridges or grooves on one surface
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • 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
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/911—Axial flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis

Abstract

The invention relates to a method and an apparatus for mixing ozone-bearing gas into a pulp-suspension of a cellulosic fibre material, where the pulp-suspension is pumped in through a pulp inlet (1) and mixed with said gas during passage through a processing-section (4) comprising a stator (13) and a rotor (14), coaxial therewith whereafter the ready-mixed pulp-mix flows out through an outlet (10), whereby the pulp-suspension, after passage through the pulp inlet (1), passes a pre-fluidization zone (5) within said processing-section (4) where it is accelerated into a fluidized state by way of fluidization means (22) on the rotor (14), whereafter the fluidized pulp-suspension flows into a mixing zone (6) within the processing-section (4) where said gas is supplied and mixed into the pulp-suspension during passage through an annularly-shaped channel (30) defined between the stator (13) and the rotor (14), in which channel (30) the turbulence-effect and the flock-decomposition in the through-flowing gas-pulp mix are enhanced by way of flow-affecting means (32) along the surfaces of the stator (13) and/or the rotor (14) which face the channel (30).
SE9303352A 1993-10-13 1993-10-13 Method and apparatus for mixing ozone-containing gas in a pulp suspension SE501895C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9303352A SE501895C2 (en) 1993-10-13 1993-10-13 Method and apparatus for mixing ozone-containing gas in a pulp suspension
PCT/SE1994/000955 WO1995010351A1 (en) 1993-10-13 1994-10-11 A method and an apparatus for mixing ozone-bearing gas into a pulp-suspension
AU79526/94A AU7952694A (en) 1993-10-13 1994-10-11 A method and an apparatus for mixing ozone-bearing gas into a pulp-suspension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9303352A SE501895C2 (en) 1993-10-13 1993-10-13 Method and apparatus for mixing ozone-containing gas in a pulp suspension

Publications (3)

Publication Number Publication Date
SE9303352D0 SE9303352D0 (en) 1993-10-13
SE9303352L true SE9303352L (en) 1995-04-14
SE501895C2 SE501895C2 (en) 1995-06-12

Family

ID=20391401

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9303352A SE501895C2 (en) 1993-10-13 1993-10-13 Method and apparatus for mixing ozone-containing gas in a pulp suspension

Country Status (3)

Country Link
AU (1) AU7952694A (en)
SE (1) SE501895C2 (en)
WO (1) WO1995010351A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6193406B1 (en) * 1996-12-20 2001-02-27 Andritz-Ahlstrom Oy Method and apparatus for mixing pulp a suspension with a fluid medium with a freely rotatable mixing rotor
AT408986B (en) * 1998-07-28 2002-04-25 Chemiefaser Lenzing Ag Method for pulp alkalization

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE419603B (en) * 1979-11-27 1981-08-17 Kamyr Ab APPLICATION FOR MIXING TREATMENT AGENTS IN SUSPENSIONS

Also Published As

Publication number Publication date
WO1995010351A1 (en) 1995-04-20
SE9303352D0 (en) 1993-10-13
AU7952694A (en) 1995-05-04
SE501895C2 (en) 1995-06-12

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