BR112018005525A2 - method and system for oxygen delignification. - Google Patents

method and system for oxygen delignification.

Info

Publication number
BR112018005525A2
BR112018005525A2 BR112018005525A BR112018005525A BR112018005525A2 BR 112018005525 A2 BR112018005525 A2 BR 112018005525A2 BR 112018005525 A BR112018005525 A BR 112018005525A BR 112018005525 A BR112018005525 A BR 112018005525A BR 112018005525 A2 BR112018005525 A2 BR 112018005525A2
Authority
BR
Brazil
Prior art keywords
pulp
phase
oxygen
increased
delignification
Prior art date
Application number
BR112018005525A
Other languages
Portuguese (pt)
Other versions
BR112018005525B1 (en
Inventor
Dahllöf Håkan
Original Assignee
Valmet Oy
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 Valmet Oy filed Critical Valmet Oy
Publication of BR112018005525A2 publication Critical patent/BR112018005525A2/en
Publication of BR112018005525B1 publication Critical patent/BR112018005525B1/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

a invenção refere-se a um estágio de deslignificação com oxigênio aprimorado localizado entre 2 posições de lavagem (w1, w2) em uma linha de fibras que produz qualidades alvejadas de polpa de celulose. o método e o sistema inventivos dividem o estágio de oxigênio em pelo menos 2 fases e, após a primeira fase, a suspensão de polpa é efetivamente despressurizada e ventilada à atmosfera de forma a ventilar o volume a granel dos gases inertes formados durante a primeira fase. a pressão de oxigênio parcial adicionada à última fase pode, assim, ser aumentada e a quantidade de oxigênio dissolvida na fase líquida é aumentada, possibilitando a melhor deslignificação da polpa de celulose na última fase.The invention relates to an enhanced oxygen delignification stage located between 2 wash positions (w1, w2) in a fiber line that produces targeted pulp pulp qualities. The inventive method and system divides the oxygen stage into at least 2 phases and, after the first phase, the pulp suspension is effectively depressurized and vented to the atmosphere to ventilate the bulk volume of inert gases formed during the first phase. . The partial oxygen pressure added to the last phase can thus be increased and the amount of dissolved oxygen in the liquid phase is increased, enabling better delignification of the pulp pulp in the last phase.

BR112018005525-5A 2015-11-27 2016-11-16 Method and system for oxygen delignification BR112018005525B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1551539-8 2015-11-27
SE1551539A SE540043C2 (en) 2015-11-27 2015-11-27 Method and system for oxygen delignification of cellulose pulp
PCT/SE2016/051128 WO2017091129A1 (en) 2015-11-27 2016-11-16 Method and system for oxygen delignification of cellulose pulp

Publications (2)

Publication Number Publication Date
BR112018005525A2 true BR112018005525A2 (en) 2018-10-09
BR112018005525B1 BR112018005525B1 (en) 2022-03-29

Family

ID=58763870

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112018005525-5A BR112018005525B1 (en) 2015-11-27 2016-11-16 Method and system for oxygen delignification

Country Status (4)

Country Link
EP (1) EP3380667B1 (en)
BR (1) BR112018005525B1 (en)
SE (1) SE540043C2 (en)
WO (1) WO2017091129A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020002445A1 (en) 2020-04-23 2021-10-28 Messer Austria Gmbh Method and device for the production of bleached pulp

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384920A (en) * 1981-04-06 1983-05-24 The Black Clawson Company Method and apparatus for oxygen delignification
US4946555A (en) * 1989-01-19 1990-08-07 Canadian Liquid Air Ltd./Air Liquide Canada Apparatus and method for measuring vent gas flow rates and parameters in pulp and paper processing
US6514380B1 (en) * 1995-03-08 2003-02-04 Andritz Oy Treatment of chemical pulp
SE505147C2 (en) * 1995-10-19 1997-06-30 Sunds Defibrator Ind Ab Oxygen delignification of pulp in a first HC stage and a second MC stage
FI955519A (en) * 1995-11-16 1997-05-17 Ahlstrom Machinery Oy Method and apparatus for delignifying chemical pulp
CA2239876A1 (en) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
AU2312797A (en) * 1996-03-26 1997-10-17 Sunds Defibrator Industries Ab Oxygen delignification of pulp in two stages
US20010050152A1 (en) * 1996-03-26 2001-12-13 Kjell Forslund Oxygen delignification of pulp in two stages
JP2001003287A (en) * 1999-06-14 2001-01-09 Praxair Technol Inc Oxygen delignification of lignocellulose material
SE522593C2 (en) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech Oxygen gas delignification system and method of pulp of lignocellulosic material
SE525773C2 (en) * 2003-09-24 2005-04-26 Kvaerner Pulping Tech Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase
SE0403222L (en) * 2004-12-30 2005-11-08 Kvaerner Pulping Tech Method for oxygen delignification of cellulose pulp at high pressure in several steps
SE526707C2 (en) * 2004-12-30 2005-10-25 Kvaerner Pulping Tech Continuous alkaline oxygen gas delignification of pulp, uses reactor system divided into high and low pressure runs

Also Published As

Publication number Publication date
BR112018005525B1 (en) 2022-03-29
EP3380667A1 (en) 2018-10-03
EP3380667A4 (en) 2019-04-17
EP3380667B1 (en) 2020-01-08
WO2017091129A1 (en) 2017-06-01
SE540043C2 (en) 2018-03-06
SE1551539A1 (en) 2017-05-28

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Legal Events

Date Code Title Description
B06U Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/11/2016, OBSERVADAS AS CONDICOES LEGAIS.