BR0101851A - Method to treat pulp - Google Patents

Method to treat pulp

Info

Publication number
BR0101851A
BR0101851A BR0101851A BR0101851A BR0101851A BR 0101851 A BR0101851 A BR 0101851A BR 0101851 A BR0101851 A BR 0101851A BR 0101851 A BR0101851 A BR 0101851A BR 0101851 A BR0101851 A BR 0101851A
Authority
BR
Brazil
Prior art keywords
pulp
ozone
chlorine
bleaching
gas
Prior art date
Application number
BR0101851A
Other languages
Portuguese (pt)
Inventor
Kaj Henricson
Original Assignee
Andritz Ahlstrom 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 Andritz Ahlstrom Oy filed Critical Andritz Ahlstrom Oy
Publication of BR0101851A publication Critical patent/BR0101851A/en

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Abstract

"MéTODO PARA TRATAR POLPA". A presente invençãorefere-se a um método e uma aparelhagem para tratar polpa.Especialmente, a invenção refere-se a um método e um aparelhode branqueamento para branquear polpa com ozónio e dióxido decloro e/ou cloro, na presença de oxigênio. Um recursocaracterístico do método de branqueamento de polpa em umprocesso contínuo com ozónio e cloro e/ou dióxido de cloro, deacordo com a invenção, método no qual o ozónio é introduzidoprimeiro na polpa com oxigênio que atua como gás transportadorprincipal para o ozónio, após o que o cloro e/ou dióxido de cloro émisturado na polpa, é que o ozónio é misturado na polpa, o gástransportador é separado depois do branqueamento com ozónio(20, 200), dióxido de cloro e/ou cloro é adicionado à polpa, a polpaé transferida junto com o gás transportador remanescente paradentro de uma torre com corrente ascendente (26; 261), o gástransportador é separado, e depois da separação do gás, a polpa élevada para um lavador (32, 232) ou uma prensa."METHOD FOR TREATING PULP". The present invention relates to a method and apparatus for treating pulp. Especially, the invention relates to a method and a bleaching apparatus for bleaching pulp with ozone and chlorine dioxide and / or chlorine in the presence of oxygen. A characteristic feature of the pulp bleaching method in a continuous process with ozone and chlorine and / or chlorine dioxide, according to the invention, a method in which ozone is first introduced into the pulp with oxygen which acts as the main carrier gas for ozone, after which chlorine and / or chlorine dioxide is mixed in the pulp, is that ozone is mixed in the pulp, the gas carrier is separated after bleaching with ozone (20, 200), chlorine dioxide and / or chlorine is added to the pulp, the pulp transferred together with the carrier gas remaining within an upstream turret (26; 261), the gas carrier is separated, and after the gas has been separated, the pulp is taken to a washer (32, 232) or a press.

BR0101851A 2000-05-10 2001-05-10 Method to treat pulp BR0101851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20001095A FI20001095A (en) 2000-05-10 2000-05-10 Method for treating pulp

Publications (1)

Publication Number Publication Date
BR0101851A true BR0101851A (en) 2001-12-18

Family

ID=8558358

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0101851A BR0101851A (en) 2000-05-10 2001-05-10 Method to treat pulp

Country Status (2)

Country Link
BR (1) BR0101851A (en)
FI (1) FI20001095A (en)

Also Published As

Publication number Publication date
FI20001095A (en) 2001-11-11

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Legal Events

Date Code Title Description
B25D Requested change of name of applicant approved
B25G Requested change of headquarter approved
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]