EP3472383A1 - Procédé de production d'une matière fibreuse - Google Patents

Procédé de production d'une matière fibreuse

Info

Publication number
EP3472383A1
EP3472383A1 EP17724804.4A EP17724804A EP3472383A1 EP 3472383 A1 EP3472383 A1 EP 3472383A1 EP 17724804 A EP17724804 A EP 17724804A EP 3472383 A1 EP3472383 A1 EP 3472383A1
Authority
EP
European Patent Office
Prior art keywords
chemicals
refiner
mixture
sodium sulfite
sodium bisulfite
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.)
Granted
Application number
EP17724804.4A
Other languages
German (de)
English (en)
Other versions
EP3472383B1 (fr
Inventor
Oleg Shagaev
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Publication of EP3472383A1 publication Critical patent/EP3472383A1/fr
Application granted granted Critical
Publication of EP3472383B1 publication Critical patent/EP3472383B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
    • 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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • 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
    • D21B1/14—Disintegrating in mills
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/12—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites sodium bisulfite
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/266—Multistage processes the same pulping agent being used in all stages
    • 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
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining

Definitions

  • the invention relates to a process for the production of fibrous lignocellulose from wood, preferably in the form of wood chips, wherein the lignocellulosic material is impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a crushing process in a refiner.
  • Methods for producing high yield pulp are e.g. known from CA 1051618.
  • Bisulfite can be used in the pretreatment stage but also in the
  • Free S0 2 can also condense with water vapor and produce corrosion on colder parts of the apparatus. At the higher pH
  • Refining plates come through calcium salts. At lower pH values can be
  • the aim of the invention is to avoid corrosion on the one hand and formation of deposits on the refiner plates on the other. This is achieved by additionally introducing chemicals from a mixture of sodium sulfite and sodium bisulfite directly into the refiner. This allows the conditions of addition to the impregnation and in the refiner
  • An advantageous development of the invention is characterized in that the chemicals with a pH of 6.0 to 7.5, preferably from 6.5 to 7.0, are fed to the impregnation. This can be done with the corrosion
  • a favorable embodiment of the invention is characterized in that the chemicals having a pH of 4.0-5.5, preferably 4.2-4.5, are added to the refiner. This allows the formation of deposits on the refiner plates can be greatly reduced or avoided, thereby significantly extending the life of the plates, resulting in enormous cost savings. Also, the salt formation, in particular of calcium salts, thereby substantially avoided.
  • An advantageous embodiment of the invention is characterized in that 60-80% of the chemicals are added to the impregnation and 20-40% of the chemicals in the refiner. This is a particularly good utilization of
  • a favorable development of the invention is characterized in that the impregnation is carried out at a temperature of 80-170 ° C, preferably 130-140 ° C. In this temperature range, a particularly good and rapid implementation of the chemicals can be achieved.
  • a favorable development of the invention is characterized in that the total amount of chemicals added is 1-20 kg / t, preferably 10-15 kg / t. Thus, the specific energy consumption of the process, in particular the comminution in the refiner, can be significantly reduced.
  • FIG. A flow diagram of a pretreatment plant with impregnation
  • the FIGURE shows an example of a system circuit according to the invention.
  • woodchips which may already be pretreated, fed to a reactor 2 for impregnation.
  • a chemical This is a mixture of sodium sulfite and sodium bisulfite.
  • the chemical supplied here has a pH of about 6.5-7.0 and is about 60-80% of the total amount of chemicals to be added. It has been shown that at a pH of 6.5 - 7.0 already 60 - 80% of the reaction after a short time, often after a few
  • the pH can be 6.0
  • the remaining amount of about 20-40% of the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite, is fed in via a line 6.
  • the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite
  • the pH here can be 4.0-5.5. This results in the crushing zone, a pH value, the deposits and coating on the refining plates, in particular of calcium sulfide prevented.
  • the invention is not limited to the examples described. It can be used for both hardwood and softwood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de production d'une matière fibreuse à partir de lignocellulose de bois, de préférence sous forme de copeaux, la matière lignocellulosique étant imprégnée d'un mélange de sulfite de sodium et de bisulfite de sodium, puis soumise à un processus de broyage dans un raffineur. L'invention se caractérise principalement en ce que des substances chimiques constituées d'un mélange de sulfite de sodium et de bisulfite de sodium sont en outre introduites directement dans le raffineur. Les conditions optimales peuvent ainsi être fixées pour les deux flux d'addition de substances chimiques de sorte que le processus peut être mis en oeuvre avantageusement sur le plan énergétique et que la corrosion et la formation de dépôts dans le raffineur et dans les groupes adjacents peuvent être évitées dans une large mesure.
EP17724804.4A 2016-06-17 2017-05-18 Procédé de production d'une matière fibreuse Active EP3472383B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50551/2016A AT518800B1 (de) 2016-06-17 2016-06-17 Verfahren zur herstellung von faserstoff
PCT/EP2017/061926 WO2017215877A1 (fr) 2016-06-17 2017-05-18 Procédé de production d'une matière fibreuse

Publications (2)

Publication Number Publication Date
EP3472383A1 true EP3472383A1 (fr) 2019-04-24
EP3472383B1 EP3472383B1 (fr) 2020-03-04

Family

ID=58745225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17724804.4A Active EP3472383B1 (fr) 2016-06-17 2017-05-18 Procédé de production d'une matière fibreuse

Country Status (6)

Country Link
US (1) US11535983B2 (fr)
EP (1) EP3472383B1 (fr)
AT (1) AT518800B1 (fr)
CA (1) CA3028009C (fr)
RU (1) RU2704362C1 (fr)
WO (1) WO2017215877A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7697967B2 (en) 2005-12-28 2010-04-13 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225028A (en) * 1962-06-11 1965-12-21 Nordgren Robert Acrolein adducts of polygalactomannans and polyglucomannans and process of preparing same
FI42161C (fi) * 1963-04-03 1970-05-11 Defibrator Ab Tapa mekaanisten ja puolikemiallisten massojen valmistamiseksi jatkuvasti lignoselluloosapitoisesta aineesta
GB1041995A (en) * 1964-11-24 1966-09-07 Fmc Corp Production of cellulosic pulp of increased brightness
CA1051618A (fr) * 1976-05-14 1979-04-03 Prescott E. Gardner Methode de production de pates chimico-mecaniques a grand rendement
US4486267A (en) * 1983-11-14 1984-12-04 Mead Corporation Chemithermomechanical pulping process employing separate alkali and sulfite treatments
NZ211684A (en) * 1985-04-04 1989-07-27 Caxton Paper Ltd Manufacture of cellulose pulp: second digestion step follows initial digestion and refining steps
KR100750330B1 (ko) * 2005-05-30 2007-08-20 유해일 옥수숫대 기계펄프의 제조방법
WO2007012350A1 (fr) 2005-07-27 2007-02-01 Kronospan Technical Company Ltd. Procede pour produire des articles constitues de materiaux derives du bois a faible emission de composes chimiques
US8734611B2 (en) 2008-03-12 2014-05-27 Andritz Inc. Medium consistency refining method of pulp and system
DE102009057208A1 (de) * 2009-11-27 2011-06-01 Technische Universität Dresden Verfahren zur Herstellung von lignozellulosen Papierfaserstoffen sowie daraus gewonnene Papiere, Kartone und Pappen
EP2348154A1 (fr) * 2010-01-22 2011-07-27 Andritz AG Procédé de fabrication de matériaux en bois

Also Published As

Publication number Publication date
WO2017215877A1 (fr) 2017-12-21
AT518800B1 (de) 2019-09-15
AT518800A1 (de) 2018-01-15
US20190352849A1 (en) 2019-11-21
US11535983B2 (en) 2022-12-27
RU2704362C1 (ru) 2019-10-28
CA3028009C (fr) 2022-12-13
EP3472383B1 (fr) 2020-03-04
CA3028009A1 (fr) 2017-12-21

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