NO983938L - Improved recovery of fine fibers from suspensions containing fibers and contaminants - Google Patents

Improved recovery of fine fibers from suspensions containing fibers and contaminants

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Publication number
NO983938L
NO983938L NO983938A NO983938A NO983938L NO 983938 L NO983938 L NO 983938L NO 983938 A NO983938 A NO 983938A NO 983938 A NO983938 A NO 983938A NO 983938 L NO983938 L NO 983938L
Authority
NO
Norway
Prior art keywords
fraction
filter
fibers
fine fibers
fine
Prior art date
Application number
NO983938A
Other languages
Norwegian (no)
Other versions
NO983938D0 (en
Inventor
Ryan M Smith
M Roland Fjollstr
Original Assignee
Alfa Laval Ab
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
Priority claimed from US08/608,131 external-priority patent/US5621735A/en
Priority claimed from PCT/SE1997/000334 external-priority patent/WO1997032079A1/en
Application filed by Alfa Laval Ab filed Critical Alfa Laval Ab
Publication of NO983938D0 publication Critical patent/NO983938D0/en
Publication of NO983938L publication Critical patent/NO983938L/en

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Abstract

Det er her vist fremgangsmåter og anordninger for forbedret gjenvinning av fine fibre fra en matesuspensjon bestående av lange fibre, medium fibre, fine korte fibre, forurensninger og væskebærer. l den foretrukne utføringsform fremføres en matesuspensjon til et første filter der den separeres i første og andre fraksjoner. Den første fraksjon består av fine fibre, forurensninger og væskebærer som har passert gjennom det første filter. Den andre fraksjon består av fibre, fine fibre og væskebærer som er tilbakeholdt på det første filterets overflate. Den andre fraksjon blir så fjernet fra det første filter for videre behandling eller bruk i papirfremstillingsprosessen. Den Tør§fe"fréksjo'n blir så fremført til en andre anord- ning for separering i tredje og fjerde fraksjoner. Den tredje fraksjon består av fine fibre og væskebærer som ikke passerer gjennom det andre filter. Den fjerde frak- sjon består av forurensninger og væskebærer som passerer gjennom det andre filter. Den tredje fraksjon representerer fine fibre som ellers ville ha gått tap i produksjonsprosessen. Den tredje fraksjon blir så tilbakeført til det første filter ved et sted der den andre fraksjon er dannet. Fibermatten som utgjør den andre frak- sjon hjelper det første filter til å tilbakeholde de fine fibre som forefinnes i den tredje fraksjon, mens væskebæreren strømmer gjennom den andre fraksjon og det første filter og igjen inn i den første fraksjon.Methods and devices for improved recovery of fine fibers from a feed suspension consisting of long fibers, medium fibers, fine short fibers, contaminants and liquid carriers are shown herein. In the preferred embodiment, a feed suspension is fed to a first filter where it is separated into first and second fractions. The first fraction consists of fine fibers, impurities and liquid carriers which have passed through the first filter. The second fraction consists of fibers, fine fibers and liquid carriers retained on the surface of the first filter. The second fraction is then removed from the first filter for further processing or use in the papermaking process. The dry fraction is then passed to a second device for separation into third and fourth fractions. The third fraction consists of fine fibers and liquid carriers which do not pass through the second filter. The fourth fraction consists of contaminants. and liquid carrier passing through the second filter. The third fraction represents fine fibers that would otherwise have been lost in the production process. The third fraction is then returned to the first filter at a site where the second fraction is formed. The auxiliary filter helps to retain the fine fibers contained in the third fraction, while the liquid carrier flows through the second fraction and the first filter and into the first fraction again.

NO983938A 1996-02-28 1998-08-27 Improved recovery of fine fibers from suspensions containing fibers and contaminants NO983938L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/608,131 US5621735A (en) 1992-08-13 1996-02-28 Adaptive time-division multiplexing communications protocol method and system
PCT/SE1997/000334 WO1997032079A1 (en) 1996-02-28 1997-02-27 Improved recovery of fine fibers from suspensions containing fibers and contaminants

Publications (2)

Publication Number Publication Date
NO983938D0 NO983938D0 (en) 1998-08-27
NO983938L true NO983938L (en) 1998-10-27

Family

ID=24435178

Family Applications (1)

Application Number Title Priority Date Filing Date
NO983938A NO983938L (en) 1996-02-28 1998-08-27 Improved recovery of fine fibers from suspensions containing fibers and contaminants

Country Status (1)

Country Link
NO (1) NO983938L (en)

Also Published As

Publication number Publication date
NO983938D0 (en) 1998-08-27

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