GB2005394A - Drying wood pulp - Google Patents

Drying wood pulp

Info

Publication number
GB2005394A
GB2005394A GB7839409A GB7839409A GB2005394A GB 2005394 A GB2005394 A GB 2005394A GB 7839409 A GB7839409 A GB 7839409A GB 7839409 A GB7839409 A GB 7839409A GB 2005394 A GB2005394 A GB 2005394A
Authority
GB
United Kingdom
Prior art keywords
air
wood pulp
burner
recycled
pulp
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
GB7839409A
Other versions
GB2005394B (en
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 Courtaulds PLC filed Critical Courtaulds PLC
Priority to GB7839409A priority Critical patent/GB2005394B/en
Publication of GB2005394A publication Critical patent/GB2005394A/en
Application granted granted Critical
Publication of GB2005394B publication Critical patent/GB2005394B/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • D21C9/185—De-watering; Elimination of cooking or pulp-treating liquors from the pulp comprising at least one step where the pulp is suspended in a gaseous medium, e.g. flash drying

Landscapes

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

Abstract

Wood pulp is dried by contacting it with heated air and subjecting the air and pulp to turbulence in a dryer 2 comprising relatively contrarotating members 15, 16 which intermesh on rotation so that dried wood pulp fibres are suspended in the air issuing from the dryer via exit passage 24. The heated air is produced by heating air in a burner 1 to a temperature of from 300 DEG to 600 DEG C by burning a fuel, issuing from a jet 5, in the air. The dried wood pulp fibres are separated from the air in a cyclone separator 3 and a portion of the air thus separated is recycled via pipes 30 and 32 to the burner 1. The air admitted to the burner 1 comprises fresh air introduced through an inlet, and recycled air introduced through an inlet 6 from the pipe 32, the proportion of fresh air being such that the heated air contacting the pulp has an oxygen content of less than 10 per cent by volume. The use of recycled air reduces the risk of fire when drying the wood pulp. <IMAGE>
GB7839409A 1977-10-06 1978-10-05 Drying wood pulp Expired GB2005394B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7839409A GB2005394B (en) 1977-10-06 1978-10-05 Drying wood pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4159677 1977-10-06
GB7839409A GB2005394B (en) 1977-10-06 1978-10-05 Drying wood pulp

Publications (2)

Publication Number Publication Date
GB2005394A true GB2005394A (en) 1979-04-19
GB2005394B GB2005394B (en) 1982-03-31

Family

ID=26264712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839409A Expired GB2005394B (en) 1977-10-06 1978-10-05 Drying wood pulp

Country Status (1)

Country Link
GB (1) GB2005394B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122321A (en) * 1982-06-24 1984-01-11 Brown & Williamson Tobacco Pneumatic conveying tobacco drying apparatus
EP0595674A1 (en) * 1992-10-19 1994-05-04 Canadian Liquid Air Ltd Air Liquide Canada Ltee Process for pH and fire control in pulp balers
WO2017085633A1 (en) * 2015-11-17 2017-05-26 Stora Enso Oyj Process for producing fiber-polymer composites

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122321A (en) * 1982-06-24 1984-01-11 Brown & Williamson Tobacco Pneumatic conveying tobacco drying apparatus
EP0595674A1 (en) * 1992-10-19 1994-05-04 Canadian Liquid Air Ltd Air Liquide Canada Ltee Process for pH and fire control in pulp balers
WO2017085633A1 (en) * 2015-11-17 2017-05-26 Stora Enso Oyj Process for producing fiber-polymer composites
US11331830B2 (en) 2015-11-17 2022-05-17 Stora Enso Oyj Process for producing fiber-polymer composites

Also Published As

Publication number Publication date
GB2005394B (en) 1982-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee