EP3472383B1 - Procédé de production d'une matière fibreuse - Google Patents

Procédé de production d'une matière fibreuse Download PDF

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Publication number
EP3472383B1
EP3472383B1 EP17724804.4A EP17724804A EP3472383B1 EP 3472383 B1 EP3472383 B1 EP 3472383B1 EP 17724804 A EP17724804 A EP 17724804A EP 3472383 B1 EP3472383 B1 EP 3472383B1
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EP
European Patent Office
Prior art keywords
chemicals
refiner
added
impregnation
sodium
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.)
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Application number
EP17724804.4A
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German (de)
English (en)
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EP3472383A1 (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
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Andritz AG
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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 wood pulp from lignocellulose, preferably in the form of wood chips, the lignocellulosic material being impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a comminution process in a refiner.
  • Processes for the production of high-yield pulp are, for example, from the CA 1051618 known.
  • chemicals for removing the lignin are added in a pretreatment for the impregnation.
  • the WO2007 / 012350 A1 describes a process for the production of wood-based products, in which the wood before gluing z. B. is treated in the stove or in the refiner with bisulfite.
  • the EP 0199481 A1 describes a process for the production of pulp, in which chemicals from the sodium sulfite family are used for impregnation. The use of sulfur compounds in wood chips but also annual plants is well known and is used to save energy in comminution and to improve the quality of the pulp in mechanical pulp. Mixtures of sodium sulfite and sodium bisulfite at temperatures of 100 - 150 ° C are usually used as chemicals, with the pulp spending a certain time in a container after being impregnated by the chemicals.
  • Sodium sulfite and sodium bisulfite are present together, with the equilibrium shifting depending on the pH. At a low pH (approx. 4 - 5.5) the larger proportion of sodium bisulfite is present, while at a higher pH (approx. 6 - 7.5) the majority of the mixture is in the form of sodium sulfite. In order to avoid SO 2 emissions, a pH of less than 5.5 is often used, and often less than 4.0.
  • the gaseous SO 2 as a product of bisulfite decomposition can also occur in the pretreatment stage during comminution. Free SO 2 can also condense with water vapor and cause corrosion on colder parts of the apparatus.
  • the aim of the invention is to prevent corrosion on the one hand and the 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, the chemicals having a pH of 6.0-7.5, preferably 6.5-7.0, of Impregnation are supplied and the additional chemicals with a pH of 4.0-5.5, preferably 4.2-4.5, are added to the refiner.
  • 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 are added to the refiner. A particularly good use of the chemicals is thus achieved.
  • a favorable further 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 quick implementation of the chemicals can be achieved.
  • a favorable further development of the invention is characterized in that the total amount of chemicals added is 1-20 kg / t, preferably 10-15 kg / t. This enables the specific energy consumption of the process, in particular the size reduction in the refiner, to be significantly reduced.
  • FIG. 1 shows a flow diagram of a pretreatment system with impregnation and subsequent comminution in the refiner.
  • Wood chips which may already have been pretreated, are fed from a storage container 1 to a reactor 2 for impregnation.
  • a chemical is supplied via a line 3. This is a mixture of sodium sulfite and sodium bisulfite.
  • the chemical supplied here has a pH of approx. 6.5 -7.0 and is approx. 60 - 80% of the total amount of chemicals to be added. It has been shown that at a pH of 6.5-7.0, 60-80% of the reaction is complete after a short time, often after a few seconds of reaction time. In principle, the pH value can be 6.0 - 7.5.
  • the impregnated chips are fed to a refiner 5 for comminution.
  • the remaining amount of approximately 20-40% of the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite, is fed in here via a line 6.
  • the addition can also be introduced into the shredding zone with the dilution water through holes in the grinding plates of the stators.
  • the invention is not restricted to the examples described. Rather, 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)

Claims (4)

  1. Procédé de fabrication de matière fibreuse constituée de ligno-cellulose de bois, de préférence sous forme de copeaux, la ligno-cellulose étant imprégnée de produits chimiques constitués d'un mélange de sulfite de sodium et de bisulfite de sodium et ensuite soumis à un processus de broyage dans un raffineur, caractérisé en ce que de plus les produits chimiques dans un mélange constitué de sulfite de sodium et de bisulfite de sodium sont introduits directement dans le raffineur, les produits chimiques ayant un pH compris entre 6,0 et 7,5, de préférence entre 6,5 et 7,0 étant introduits dans l'imprégnation et les produits chimiques supplémentaires ayant un pH compris entre 4,0 et 5,5 , de préférence entre 4,2 et 4,5, étant ajoutés dans le raffineur.
  2. Procédé selon la revendication 1, caractérisé en ce qu'entre 60 et 80 % des produits chimiques sont placés dans l'imprégnation et entre 20 et 40% des produits chimiques dans le raffineur.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que l'imprégnation s'effectue à une température comprise entre 80 et 170 °C, de préférence entre 120 et 140 °C
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la quantité totale des produits chimiques ajoutés s'élevant entre 1 et 20 kg/t, de préférence entre 1 et 15 kg/t.
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 EP3472383A1 (fr) 2019-04-24
EP3472383B1 true 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
DE1253031B (de) * 1963-04-03 1967-10-26 Defibrator Ab Verfahren zur Herstellung mechanischen und/oder chemomechanischen Faserstoffs aus lignozellulosehaltigem Material
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
PL1907178T3 (pl) 2005-07-27 2017-01-31 Kronoplus Technical Ag Sposób wytwarzania wyrobu z tworzyw drzewnych o niewielkiej emisji związków chemicznych
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
AT518800A1 (de) 2018-01-15
AT518800B1 (de) 2019-09-15
RU2704362C1 (ru) 2019-10-28
US11535983B2 (en) 2022-12-27
EP3472383A1 (fr) 2019-04-24
WO2017215877A1 (fr) 2017-12-21
CA3028009C (fr) 2022-12-13
CA3028009A1 (fr) 2017-12-21
US20190352849A1 (en) 2019-11-21

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