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Process and arrangement for replacing intra-fiber liquid in fibers with a replacement liquid

a technology of fiber liquid and fiber wall, which is applied in the direction of water/sludge/sewage treatment, washing apparatus, application, etc., can solve the problems of fiber wall pores and lumens that have not been the object of attention, high energy consumption and excessive stress in the machinery used

Inactive Publication Date: 2006-06-15
STF 1 SKOGSINDNS TEKNISKA FORSKNINGSINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is well known that cooked or digested materials such as wood pulp fibers or textile fibers such as cotton fibers and other fibers with pores in their fiber walls, are containing various chemicals or substances that are less desirable or eligible.
High energy consumption and excessive stress in the machinery used are probable reasons.
This has also led to that the liquid in the fiber wall pores and lumen have not been the object of attention for the professionals in the field.

Method used

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  • Process and arrangement for replacing intra-fiber liquid in fibers with a replacement liquid
  • Process and arrangement for replacing intra-fiber liquid in fibers with a replacement liquid
  • Process and arrangement for replacing intra-fiber liquid in fibers with a replacement liquid

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Embodiment Construction

[0038]FIG. 7 is illustrating a process according to the invention having the following steps; compressing a fiber cake to such a degree that a substantial quantity of the contaminated intra-fiber liquid is expressed to the space between the fibers and partially out of the fiber cake. At the same time a replacement liquid is forcibly supplied to the fiber cake during the compression and displacing the intra-fiber liquid from the space between the fibers. This means that the residual contaminated liquid is greatly diluted and getting even more so when in an expansion phase the fibers expand while supplying additional replacement liquid which liquid is thus further absorbed by the expanding fibers. The whole process means that an exchange or replacement has taken place where the replacement liquid has replaced the contaminated liquid not altogether but in such a degree that the content of the contaminant in the treated fibers is diluted in a high degree.

[0039] According to FIG. 1, a d...

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Abstract

A process and apparatus for replacing intra-fiber liquid in fibers by a replacement liquid, includes compressing the fiber cake to express a substantial quantity of intra-fiber liquid to the space between the fibers; forcibly supplying replacement liquid to the fiber cake during the compression thereby replacing the intra-fiber liquid from the space between the fibers and letting the fibers expand while supplying additional replacement liquid. The invention gets rid of or significantly reduces the content of contaminating material in not only the areas between the fibers in a fiber cake but also in the fiber wall pores and the lumen and replaces this liquid by a replacement liquid.

Description

[0001] The present invention is generally directed to a process and an arrangement for replacing intra-fiber liquid in fibers with a replacement liquid. BACKGROUND OF THE INVENTION [0002] It is well known that cooked or digested materials such as wood pulp fibers or textile fibers such as cotton fibers and other fibers with pores in their fiber walls, are containing various chemicals or substances that are less desirable or eligible. To get rid of or at least lessen their contents various methods of washing fibers have been used. [0003] The original method used for fiber washing is dilution-extraction. It consists of diluting a fiber slurry with a weaker liquid and subsequently thicken it and raising the consistency. [0004] Diffusion has also been used for washing fibers where wash liquid is mixed with the fibers and at some time later, up to a few hours, is displaced. [0005] Vacuum washers have also been used where the liquid content of the fibers are extracted by an applied vacuum...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D21C9/02D21C9/00D21C9/06D21C9/10
CPCD21C9/007D21C9/06D21C9/10
Inventor SAMUELSSON, ASASJOGREN, BIRGERVOMHOFF, HANNESSJOSTROM, LARSLUCISANO, MARCOLINDSTROM, MIKAEIIVERSEN, TOMMY
Owner STF 1 SKOGSINDNS TEKNISKA FORSKNINGSINST
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