GB1009765A - Apparatus and method for treating cellulosic material - Google Patents

Apparatus and method for treating cellulosic material

Info

Publication number
GB1009765A
GB1009765A GB27417/62A GB2741762A GB1009765A GB 1009765 A GB1009765 A GB 1009765A GB 27417/62 A GB27417/62 A GB 27417/62A GB 2741762 A GB2741762 A GB 2741762A GB 1009765 A GB1009765 A GB 1009765A
Authority
GB
United Kingdom
Prior art keywords
feed screw
unit
pipe
liquor
fed
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.)
Expired
Application number
GB27417/62A
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.)
Black Clawson Co
Original Assignee
Black Clawson Co
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 Black Clawson Co filed Critical Black Clawson Co
Publication of GB1009765A publication Critical patent/GB1009765A/en
Expired legal-status Critical Current

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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam

Landscapes

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

Abstract

1,009,765. Treating pulp. BLACK-CLAWSON CO.Inc. July 17, 1962 [July 17,1961], No. 27417/62. Headings D2A and D2W. Apparatus for treating cellulosic material in the preparation of pulp comprises a tapered perforate casing 65, a co-operating feed screw 60, and a pipe 70 extending from the discharge end of the feed screw which pipe has a cross-sectional area over the greater part 72 of its length which is less than the annular area between the feed screw at its discharge end and the casing 65. Cellulosic material e.g. wood chips, fed through the apparatus is compressed between the flights 62 of the screw and the casing 65 sufficiently to exclude substantially all voids and liquid. Upon discharge from the end of the feed screw 60 the material is enabled to expand slightly in the tapered region 71 of the pipe 70 without exposing it to the atmosphere or liquid before being recompressed into a substantially solid plug of material in the pipe 72. This plug of material is discharged inside a frusto-conical housing 75 into which treating liquor may be admitted through inlet openings 77. The action of compression, expansion and recompression which takes place upon the fibres in passing through the unit is effective in causing defibration of the cellulosic material. Plant is described and shown in Fig. 1 incorporating two such feed screw units 20, 26 as described above. Wood chips from a hopper 10 are fed by a metering screw conveyer 12 to a mixing conveyer 13 in which the chips are pretreated with caustic liquor admitted through inlet 17. The pretreated material is fed into a feed screw unit 20 in which a substantial proportion of the natural juice of the material together with the caustic liquor is removed and passed to drain. The unit 20 discharges into an inclined digester 22 the material being immediately submerged under caustic liquor thereing when discharged from the feed screw unit 20. A further feed screw unit 26 removes a substantial proportion of the liquor from the material which then passes by means of conveyer 27 to the next desired station of treatment, e.g. defibring apparatus not shown.
GB27417/62A 1961-07-17 1962-07-17 Apparatus and method for treating cellulosic material Expired GB1009765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US124470A US3157565A (en) 1961-07-17 1961-07-17 Apparatus for impregnation of cellulosic material

Publications (1)

Publication Number Publication Date
GB1009765A true GB1009765A (en) 1965-11-10

Family

ID=22415082

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27417/62A Expired GB1009765A (en) 1961-07-17 1962-07-17 Apparatus and method for treating cellulosic material

Country Status (2)

Country Link
US (1) US3157565A (en)
GB (1) GB1009765A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632729A (en) * 1984-05-01 1986-12-30 Laakso Oliver A Chip presteaming and air washing
US5766418A (en) * 1996-09-13 1998-06-16 Ahlstrom Machinery Inc. Handling fibrous material used to produce cellulose pulp
SE518789C2 (en) * 2001-05-04 2002-11-19 Kvaerner Pulping Tech Chip feed system for chip pockets
UA96288C2 (en) * 2008-10-14 2011-10-25 Анатолій Львович Мистецький Method for production of fiber semi-finished product made of cellulose-containing materials and line for its realization

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA580129A (en) * 1959-07-28 J. A. Asplund Arne Method and apparatus in the manufacture of pulp from fibrous ligno-cellulose containing materials
US2862813A (en) * 1952-12-23 1958-12-02 Process Evaluation Devel Semi-chemical pulping process
US2975096A (en) * 1957-11-18 1961-03-14 Bauer Bros Co Impregnation of wood chips

Also Published As

Publication number Publication date
US3157565A (en) 1964-11-17

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