[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

SE0203600D0 - Processes and systems for handling knots in a chemical pulping process - Google Patents

Processes and systems for handling knots in a chemical pulping process

Info

Publication number
SE0203600D0
SE0203600D0 SE0203600A SE0203600A SE0203600D0 SE 0203600 D0 SE0203600 D0 SE 0203600D0 SE 0203600 A SE0203600 A SE 0203600A SE 0203600 A SE0203600 A SE 0203600A SE 0203600 D0 SE0203600 D0 SE 0203600D0
Authority
SE
Sweden
Prior art keywords
slurry
knots
low pressure
transfer device
high pressure
Prior art date
Application number
SE0203600A
Other languages
Swedish (sv)
Other versions
SE0203600L (en
Inventor
C Bertil Stromberg
Original Assignee
Andritz Inc
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 Inc filed Critical Andritz Inc
Publication of SE0203600D0 publication Critical patent/SE0203600D0/en
Publication of SE0203600L publication Critical patent/SE0203600L/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
    • D21C7/00—Digesters
    • D21C7/06—Feeding devices
    • 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
    • D21C7/00—Digesters
    • D21C7/08—Discharge devices

Landscapes

  • Paper (AREA)

Abstract

Processes and systems are provided for cooking wood chips containing knots in a digester to produce a chemical pulp. Specifically, a low pressure slurry of comminuted cellulosic fibrous material is formed in a vessel operating at essentially atmospheric pressure by mixing therein a liquid and the comminuted cellulosic fibrous material. The low pressure slurry is thereafter supplied to a low pressure inlet of a high pressure transfer device while liquid is removed from the slurry through a low pressure outlet thereof. A high pressure liquid is supplied to the transfer device (e.g., via a slurry pump) so as to form a high pressure slurry of the comminuted cellulosic material which is then discharged from a high pressure outlet of the transfer device. Knots are removed via a knot separator from a slurry of uncooked knot-containing cellulosic material at essentially atmospheric pressure. The removed knots are thereafter transferred to the vessel so that the knots become part of the low pressure slurry supplied to the low pressure inlet of the transfer device.
SE0203600A 2001-12-04 2002-12-04 Methods and systems for handling twigs in a chemical pulping process SE0203600L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33496301P 2001-12-04 2001-12-04
US10/283,369 US20030102092A1 (en) 2001-12-04 2002-10-30 Processes and systems for handling knots in a chemical pulping process

Publications (2)

Publication Number Publication Date
SE0203600D0 true SE0203600D0 (en) 2002-12-04
SE0203600L SE0203600L (en) 2003-06-05

Family

ID=46150221

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0203600A SE0203600L (en) 2001-12-04 2002-12-04 Methods and systems for handling twigs in a chemical pulping process

Country Status (5)

Country Link
US (1) US20030102092A1 (en)
JP (1) JP2003193386A (en)
CA (1) CA2413386A1 (en)
FI (1) FI20022097A (en)
SE (1) SE0203600L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011102760A1 (en) * 2010-02-17 2011-08-25 Metso Paper Sweden Ab Method and system for recycling of rejects in a process for cooking chemical pulp
US9580864B2 (en) * 2011-08-30 2017-02-28 Valmet Ab Kraft cooking method using polysulfide cooking liquor

Also Published As

Publication number Publication date
US20030102092A1 (en) 2003-06-05
FI20022097A0 (en) 2002-11-26
SE0203600L (en) 2003-06-05
CA2413386A1 (en) 2003-06-04
JP2003193386A (en) 2003-07-09
FI20022097A (en) 2003-06-05

Similar Documents

Publication Publication Date Title
SE0101552L (en) Input of cellulose material into a treatment vessel
EP2003241A3 (en) Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method
FI126370B (en) Process and system for feeding of finely divided fiber material
EP2014827A3 (en) Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method
ATE524597T1 (en) ARRANGEMENT FOR FEEDING A SLURRY OF CHIPS AND LIQUID
FI63447C (en) FOERFARANDE FOER FRAMSTAELLNING AV CELLULOSAMASSA MED HOEGT UTYTE OCH TILL LAOGA KOSTNAD
US7314538B2 (en) Process and device for discharging lignocellulose raw materials from a digester and conveying the raw material to a refiner
CA1278208C (en) Treatment of high yield pulp
SE9903202D0 (en) Method and apparatus for continuously pulping cellulosic fibrous material
SE0203600D0 (en) Processes and systems for handling knots in a chemical pulping process
FI78745B (en) PUMPNING OCH FOERAEDLING AV SAOGSPAON.
SE9400616L (en) Handling of twig during continuous cooking
SE0801734A1 (en) Method and system for feeding cellulose chips to a high pressure system for continuous cooking
SE0000317D0 (en) Minimization of malodorous gas release from a cellulose pulp mill feed system
SE0501366L (en) Process and system for feeding cellulose chips into a high pressure continuous boiling system
RU2140475C1 (en) Method and apparatus for continuous production of pulp
SE0300258D0 (en) Gas phase continuous digester having an inverted top separator with liquor ingection
WO1999020827A1 (en) Process system and method for preliminary treatment of disintegrated cellulose-containing material prior to pulp digestion
CA2357864A1 (en) Process for continuous cooking of pulp
ES2131346T3 (en) PAPER PULP PRODUCTION PROCESS.
SE9903470L (en) Continuous cellulose pulp cooker
US20030102093A1 (en) Processes and systems for handling knots in a chemical pulping process
CN105735022B (en) A kind of paper-making pulping liquid and the pulping process using the liquid
FI60042B (en) METHOD OF INSPECTION OF BLEACHING CHEMICALS IN FIBER MASS WITH MASSAGE CONCENTRATION
SE7411950L (en) PREPARATION OF IMPROVED HIGH YIELD MASS

Legal Events

Date Code Title Description
NAV Patent application has lapsed