MX167934B - IMPROVEMENTS IN THE PULP REDUCTION PROCESS IN A DISCONTINUOUS DIGESTOR OF MULTIPLE STAGES - Google Patents

IMPROVEMENTS IN THE PULP REDUCTION PROCESS IN A DISCONTINUOUS DIGESTOR OF MULTIPLE STAGES

Info

Publication number
MX167934B
MX167934B MX202464A MX20246484A MX167934B MX 167934 B MX167934 B MX 167934B MX 202464 A MX202464 A MX 202464A MX 20246484 A MX20246484 A MX 20246484A MX 167934 B MX167934 B MX 167934B
Authority
MX
Mexico
Prior art keywords
digester
bath
chips
cooking
temperature
Prior art date
Application number
MX202464A
Other languages
Spanish (es)
Inventor
Ralph Smythe Grant
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of MX167934B publication Critical patent/MX167934B/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
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Landscapes

  • Paper (AREA)
  • Commercial Cooking Devices (AREA)

Abstract

La presente invención se refiere a mejoras en proceso de reducción a pulpa en digestor discontinuo de etapas múltiples, para la cocción de virutas de maderas, caracterizads en que comprenden los pasos de: introducir las virutas de madera a coccionar en un digestor; remojar las virutas del digestor con un baño caliente negro para eliminar la mayor parte de aire del digestor y de las virutas; desplazar el baño caliente negro del digestor con una mezcla de un primer baño caliente negro y baño caliente blanco; elevar la temperatura del contenido del digestor hasta una temperatura de cocción; desplazar el baño del digestor con una mezcla de uns egundo baño caliente negro y baño caliente blanco; elevar la temperatura del digestor a una temperatura de cocción; una vez que las virutas han alcanzado un grado de cocción predeterminado, desplazar el baño del digestor con un líquido de filtrado procedente del lavado de la pulpa; y vaciar el contenido del digestor mediante la aplicación de presión de gas dentro del digestor.The present invention refers to improvements in the pulp reduction process in a discontinuous multi-stage digester, for the cooking of wood chips, characterized in that they comprise the steps of: introducing the wood chips to be cooked in a digester; soak the chips from the digester with a hot black bath to remove most of the air from the digester and chips; displace the black hot bath of the digester with a mixture of a first black hot bath and a white hot bath; raise the temperature of the digester contents to a cooking temperature; displace the digester bath with a mixture of a second black hot bath and white hot bath; raising the digester temperature to a cooking temperature; once the chips have reached a predetermined degree of cooking, displace the digester bath with a filtering liquid from the pulp washing; and empty the contents of the digester by applying gas pressure inside the digester.

MX202464A 1983-08-24 1984-08-22 IMPROVEMENTS IN THE PULP REDUCTION PROCESS IN A DISCONTINUOUS DIGESTOR OF MULTIPLE STAGES MX167934B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52612183A 1983-08-24 1983-08-24

Publications (1)

Publication Number Publication Date
MX167934B true MX167934B (en) 1993-04-22

Family

ID=24096001

Family Applications (1)

Application Number Title Priority Date Filing Date
MX202464A MX167934B (en) 1983-08-24 1984-08-22 IMPROVEMENTS IN THE PULP REDUCTION PROCESS IN A DISCONTINUOUS DIGESTOR OF MULTIPLE STAGES

Country Status (12)

Country Link
EP (1) EP0135461B1 (en)
JP (1) JPS6059189A (en)
KR (1) KR860001615B1 (en)
BR (1) BR8404040A (en)
CA (1) CA1255948A (en)
DE (2) DE3463401D1 (en)
ES (1) ES8506367A1 (en)
FI (1) FI80085C (en)
IN (1) IN160869B (en)
MX (1) MX167934B (en)
PH (1) PH23991A (en)
SU (1) SU1454262A3 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0171423B1 (en) * 1989-09-28 1999-05-01 더크 제이. 빈맨 Substitution heating apparatus and method in continuous immersion
US5256255A (en) * 1989-09-28 1993-10-26 Beloit Technologies, Inc. Displacement heating in continuous digesters
TW270159B (en) * 1994-03-04 1996-02-11 Beloit Technologies Inc
US5522958A (en) * 1994-07-18 1996-06-04 Pulp And Paper Research Institute Of Canada Two-stage kraft cooking
BE1011504A3 (en) * 1997-10-17 1999-10-05 Solvay Interox Manufacturing pulp chemicals.
WO2008130611A1 (en) 2007-04-18 2008-10-30 Master Key, Llc System and method for musical instruction
FI20090079A (en) * 2009-03-05 2010-09-06 Andritz Inc Heat recovery from waste cooking liquor at a pulp mill digester
CN102154874B (en) * 2011-04-29 2012-11-21 白福安 Replacement cooking pulping method
RU2499857C1 (en) * 2012-04-19 2013-11-27 Открытое акционерное общество "Группа "Илим" Method of production of sulfate pulp for chemical processing
KR102549977B1 (en) * 2021-02-26 2023-06-29 고려대학교 산학협력단 High frequency noise filtering earplug using metasurface
CN116084197A (en) * 2022-12-27 2023-05-09 中国海诚工程科技股份有限公司 Straw ethanol-process displacement cooking process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB291065A (en) * 1927-05-28 1928-10-11 George Cochrane Godfrey Improvements in or relating to processes for separating or extracting cellulose or paper pulp
BR7406365D0 (en) * 1974-08-02 1974-11-19 Suzano Papel & Celulose EQUIPMENT AND METHOD TO DELIGNIFY FIBROUS MATERIALS WITH ALKALINE SOLUTIONS
FI63268C (en) * 1979-04-11 1989-06-21 Sunds Defibrator Procedures for emptying a batch cellulose cooker.
FI831781L (en) * 1982-07-28 1984-01-29 Beloit Corp PROCESS FOER PORTIONSVIS KOKNING AV TRAEFLIS

Also Published As

Publication number Publication date
CA1255948A (en) 1989-06-20
FI843183A0 (en) 1984-08-13
KR860001615B1 (en) 1986-10-14
BR8404040A (en) 1985-07-16
IN160869B (en) 1987-08-08
SU1454262A3 (en) 1989-01-23
KR850001816A (en) 1985-04-01
DE135461T1 (en) 1986-02-13
ES535377A0 (en) 1985-07-16
FI843183A (en) 1985-02-25
DE3463401D1 (en) 1987-06-04
FI80085C (en) 1990-04-10
EP0135461A1 (en) 1985-03-27
JPS6059189A (en) 1985-04-05
PH23991A (en) 1990-02-09
ES8506367A1 (en) 1985-07-16
FI80085B (en) 1989-12-29
EP0135461B1 (en) 1987-04-29

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