CA2013011A1 - Method and means for treating pulp - Google Patents

Method and means for treating pulp

Info

Publication number
CA2013011A1
CA2013011A1 CA2013011A CA2013011A CA2013011A1 CA 2013011 A1 CA2013011 A1 CA 2013011A1 CA 2013011 A CA2013011 A CA 2013011A CA 2013011 A CA2013011 A CA 2013011A CA 2013011 A1 CA2013011 A1 CA 2013011A1
Authority
CA
Canada
Prior art keywords
screening
pulp
consistency
closed space
reduce
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.)
Granted
Application number
CA2013011A
Other languages
French (fr)
Other versions
CA2013011C (en
Inventor
Kaj Henricson
Olavi Pikka
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.)
Ahlstrom Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2013011A1 publication Critical patent/CA2013011A1/en
Application granted granted Critical
Publication of CA2013011C publication Critical patent/CA2013011C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor

Abstract

Method and means is disclosed for treating pulp, in particular fiber suspensions of the pulp and paper industry, and more specifically, for improvement of pulp mill screening plants, to make their operation more effective and to reduce the need for equipment to reduce the investment costs etc. In the known screening process it is usually desirable to increase the pulpconsistency after the screening to a range of 10 to 15% for storing or after-treatment. It is also desirable to handle rejects by either refining or some other method, but usually at consistency which is higher than that of screening. In other words, the pulp flows always have to be thickened after screening. The present invention comprises a method and means for screening pulp in a pressurized, closed space by means of screens in a consistency range of 1 to 5% and by means of centrifugal cleaners in a consistency below 1%. The various pulp screening and/or cleaning stages are effected in a pressurized state in a closed space in the screening plant. Access of air to the treated pulp is prevented by carrying out the thickening stages in a pressurized state, at the initial pressure corresponding to that of the preceding screening and/or cleaning stage.
CA002013011A 1989-03-29 1990-03-26 Method and means for treating pulp Expired - Fee Related CA2013011C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI891484 1989-03-29
FI891484A FI82082C (en) 1989-03-29 1989-03-29 FOERFARANDE OCH ANORDNING FOER BEHANDLING AV MASSA.

Publications (2)

Publication Number Publication Date
CA2013011A1 true CA2013011A1 (en) 1990-09-29
CA2013011C CA2013011C (en) 1995-09-26

Family

ID=8528130

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002013011A Expired - Fee Related CA2013011C (en) 1989-03-29 1990-03-26 Method and means for treating pulp

Country Status (5)

Country Link
US (2) US5112444A (en)
EP (1) EP0390403A3 (en)
JP (1) JPH086273B2 (en)
CA (1) CA2013011C (en)
FI (1) FI82082C (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794791A (en) * 1987-11-30 1998-08-18 Genesis Research Corporation Coal cleaning process
CA1327342C (en) * 1987-11-30 1994-03-01 James Kelly Kindig Process for beneficiating particulate solids
DE4041105A1 (en) * 1990-12-21 1992-06-25 Toepholm & Westermann METHOD FOR PRODUCING INDIVIDUALLY ADAPTED OTOPLASTICS OR EARPIECES TO THE CONTOURS OF AN EAR CHANNEL
US5405499A (en) * 1993-06-24 1995-04-11 The Procter & Gamble Company Cellulose pulps having improved softness potential
US5453159A (en) * 1993-11-04 1995-09-26 International Paper Company Deinking of recycled pulp
US5575395A (en) * 1994-07-15 1996-11-19 A. Ahlstrom Corporation Method and apparatus for screening fibrous suspensions
US5679218A (en) * 1994-07-29 1997-10-21 The Procter & Gamble Company Tissue paper containing chemically softened coarse cellulose fibers
CA2158522C (en) * 1994-09-19 2001-04-10 Daniel R. Roll Mixer for mixing multi-phase fluids
CZ287352B6 (en) * 1995-02-14 2000-10-11 Julia Innotec Gmbh Recovery process of starting materials from a flow of residual or entrapped substances containing various matters and obtained during production of paper as well as apparatus for making the same
FI97736C (en) * 1995-03-07 1997-02-10 Ahlstrom Machinery Oy Method and apparatus for handling filler-containing material, such as recycled fiber
US5715221A (en) * 1995-04-21 1998-02-03 Matsushita Electric Industrial Method for managing defects in an information recording medium, and a device and information recording medium using said method
FI112385B (en) * 1998-09-23 2003-11-28 Andritz Oy Method and apparatus for treating pulp
FI109548B (en) * 2000-04-19 2002-08-30 Pom Technology Oy Ab Paper pulp cleaning arrangement
KR20030010485A (en) * 2002-03-28 2003-02-05 주식회사 피엠시코리아 Automatic Modular Cleaner System
SE528924C2 (en) * 2004-11-16 2007-03-20 Metso Paper Inc Method of treating a fiber suspension
US20080308239A1 (en) 2007-06-12 2008-12-18 Hart Peter W Fiber blend having high yield and enhanced pulp performance and method for making same
WO2008153565A1 (en) 2007-06-12 2008-12-18 Meadwestvaco Corporation A fiber blend having high yield and enhanced pulp performance and method for making same
US20100175840A1 (en) * 2007-06-12 2010-07-15 Hart Peter W High yield and enhanced performance fiber
FI123023B (en) * 2009-09-01 2012-10-15 Andritz Oy Method and apparatus for separating soap

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1933609A (en) * 1932-02-17 1933-11-07 J O Ross Engineering Corp Multiple stage pulp washer
US3237763A (en) * 1962-07-06 1966-03-01 Wikdahl Nils Anders Lennart Method and apparatus for concentrating fibrous suspensions
CA887765A (en) * 1969-11-21 1971-12-07 Cowan Ben Pulp screening machine
DE2701737B2 (en) * 1977-01-18 1980-03-20 Hermann Finckh Maschinenfabrik Gmbh & Co, 7417 Pfullingen Process for the preparation and cleaning of fiber material as well as an installation for carrying out such a process
FI62872C (en) * 1978-06-06 1983-03-10 Ahlstroem Oy ANORDNING FOER SILNING AV FIBERSUSPENSIONER
ATE16614T1 (en) * 1980-12-31 1985-12-15 Kamyr Ab METHOD OF CONTROLLING A PRESSURE VESSEL FOR TREATMENT OF PULP.
SE431571C (en) * 1982-07-02 1985-04-21 Nils Anders Lennart Wikdahl SET FOR CLEANING A FIBER SUSPENSION
FI65829C (en) * 1982-08-06 1984-07-10 Enso Gutzeit Oy FORM OF CELLULOSE TV
SE451736B (en) * 1983-09-19 1987-10-26 Nils Anders Lennart Wikdahl WHEN WATERING A WATER SUSPENSION CONTAINING CELLULOSA FIBERS
DE3605259C1 (en) * 1986-02-19 1987-07-02 Finckh Maschf Process and installation for removing color particles from a fiber suspension obtained from waste paper
EP0298499B1 (en) * 1987-07-08 1994-03-16 A. Ahlstrom Corporation Method and apparatus for thickening fiber suspension
SE461104B (en) * 1988-05-05 1990-01-08 Kamyr Ab DEVICE FOR DIVISION OF A SUSPENSION OF A FIBER-CELLULOUS CELLULOSAMASSA
SE464640B (en) * 1988-06-16 1991-05-27 Kamyr Ab DEVICE FOR SILENCE OF A SUSPENSION OF A FIBER CELLULOSAMASSA

Also Published As

Publication number Publication date
JPH0351390A (en) 1991-03-05
EP0390403A3 (en) 1991-09-18
FI891484A0 (en) 1989-03-29
US5112444A (en) 1992-05-12
FI82082C (en) 1991-12-10
CA2013011C (en) 1995-09-26
JPH086273B2 (en) 1996-01-24
US5147504A (en) 1992-09-15
FI82082B (en) 1990-09-28
EP0390403A2 (en) 1990-10-03

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Legal Events

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