ES489784A1 - Process for preparing a paper pulp. - Google Patents

Process for preparing a paper pulp.

Info

Publication number
ES489784A1
ES489784A1 ES489784A ES489784A ES489784A1 ES 489784 A1 ES489784 A1 ES 489784A1 ES 489784 A ES489784 A ES 489784A ES 489784 A ES489784 A ES 489784A ES 489784 A1 ES489784 A1 ES 489784A1
Authority
ES
Spain
Prior art keywords
downstream
section
grinding
upstream
conveyance
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
Application number
ES489784A
Other languages
Spanish (es)
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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=9223444&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES489784(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Publication of ES489784A1 publication Critical patent/ES489784A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/16—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with two or more screws or worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121—Screw constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/26—Permeable casings or strainers
    • 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
    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Sanitary Thin Papers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)

Abstract

1. Process for grinding and washing a cellulosic material for the preparation of a paper pulp by passing the material, reduced in size to chips and impregnated with a reagent for removing lignin in a machine comprising at least two parallel screws driven in rotation inside a casing and provided with helical flights the pitches of which vary so as to determine several successive treatment zones, each zone including a section for conveyance and progressive compression and a braking section constituted by flights of inverted pitch provided with apertures allowing downstream passage of the material, having a size which is adjusted to allow selective advancement in the downstream direction of the material as a function of the degree of grinding achieved upstream of said apertures, characterised by the fact that the grinding and the washing of the chips is carried out simultaneously in the successive treatment zones of the machine, the casing of which is, for this purpose, constituted by an alternating series of filled regions and filtering regions, covering, respectively, the upstream portion and the downstream portion of each section for conveyance, each filled region being extended into the preceding braking section, the material being subjected as it passes from upstream to downstream in the machine whilst passing through each treatment zone, successively to a dilution by carrying out mixing with an actual washing liquid introduced upstream of the treatment zone then, into the flights of the screws to alternation between relaxation phases and phases of increase in pressure and finally to a drainage operation carried out at the same time as the grinding downstream of the section for conveyance and in the braking section, the used liquid being evacuated through the filtering regions of the casing.
ES489784A 1979-03-22 1980-03-21 Process for preparing a paper pulp. Expired ES489784A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7907250A FR2451963A1 (en) 1979-03-22 1979-03-22 PROCESS AND INSTALLATION FOR PREPARING AND WASHING A PAPER PULP FROM A LIGNOCELLULOSIC MATERIAL REDUCED IN PIECES

Publications (1)

Publication Number Publication Date
ES489784A1 true ES489784A1 (en) 1980-09-16

Family

ID=9223444

Family Applications (1)

Application Number Title Priority Date Filing Date
ES489784A Expired ES489784A1 (en) 1979-03-22 1980-03-21 Process for preparing a paper pulp.

Country Status (13)

Country Link
EP (1) EP0017544B1 (en)
JP (1) JPS55132788A (en)
AT (1) ATE2799T1 (en)
AU (1) AU534184B2 (en)
BR (1) BR8001684A (en)
CA (1) CA1131484A (en)
DE (1) DE3062314D1 (en)
DK (1) DK154153C (en)
ES (1) ES489784A1 (en)
FI (1) FI71585C (en)
FR (1) FR2451963A1 (en)
NO (1) NO151974C (en)
NZ (1) NZ193228A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE443383C (en) * 1981-01-14 1987-11-16 Mo Och Domsjoe Ab PROCEDURE FOR WASHING CELLULOSAMASSA
FR2509766A1 (en) * 1981-07-20 1983-01-21 Creusot Loire PROCESS FOR PRODUCING CELLULOSIC FIBER PASTE FOR NON-PAPER USE
FR2604197B1 (en) * 1986-09-23 1988-11-18 Atochem PROCESS FOR BLEACHING LIGNOCELLULOSIC MATERIALS.
FR2618811B1 (en) * 1987-07-31 1990-06-22 Centre Tech Ind Papier PROCESS FOR THE MANUFACTURE OF BLEACHED CHEMICOMECHANICAL OR CHEMICOTHERMO-MECHANICAL PASTES
FR2629844B1 (en) * 1988-04-06 1991-09-27 Clextral PROCESS FOR THE MANUFACTURE OF A PAPER PULP FOR TRUST USE
EP0979895A1 (en) * 1998-08-12 2000-02-16 Instituut Voor Agrotechnologisch Onderzoek (Ato-Dlo) Method and device for refining fibres
CN102852018A (en) * 2012-09-11 2013-01-02 江苏金沃机械有限公司 Double-screw washing machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547577A (en) * 1946-07-22 1951-04-03 Detrex Corp Countercurrent extraction apparatus
US3004876A (en) * 1957-03-20 1961-10-17 Int Basic Economy Corp Method for washing fibrous material
FR1480415A (en) * 1965-04-23 1967-05-12 Werner & Pfleiderer Method and equipment for expressing oil from seeds and oleaginous fruits in continuously operating plants
FR2319737A1 (en) * 1975-07-31 1977-02-25 Creusot Loire PAPER PULP MANUFACTURING PROCESS AND MACHINE

Also Published As

Publication number Publication date
NO151974B (en) 1985-04-01
FI71585B (en) 1986-10-10
NZ193228A (en) 1984-07-31
DK125280A (en) 1980-09-23
AU5667980A (en) 1980-09-25
ATE2799T1 (en) 1983-04-15
BR8001684A (en) 1980-11-18
DK154153B (en) 1988-10-17
NO151974C (en) 1985-07-17
AU534184B2 (en) 1984-01-12
NO800736L (en) 1980-09-23
DE3062314D1 (en) 1983-04-21
EP0017544B1 (en) 1983-03-16
JPS55132788A (en) 1980-10-15
FR2451963B1 (en) 1982-05-07
FR2451963A1 (en) 1980-10-17
FI800887A7 (en) 1980-09-23
FI71585C (en) 1987-01-19
CA1131484A (en) 1982-09-14
EP0017544A1 (en) 1980-10-15
DK154153C (en) 1989-05-22

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