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Method and apparatu sfor recovering fibres from white water of paper mill

A technology for recycling fiber and white water, which can be used in papermaking, papermaking machines, separation methods, etc., and can solve problems such as difficult implementation.

Inactive Publication Date: 2002-05-15
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technical solution is difficult to implement

Method used

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  • Method and apparatu sfor recovering fibres from white water of paper mill
  • Method and apparatu sfor recovering fibres from white water of paper mill
  • Method and apparatu sfor recovering fibres from white water of paper mill

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Embodiment Construction

[0017] Figure 1 is a block schematic diagram representing an embodiment of the method for carrying out the invention. In this embodiment, the filter 2 is supplied with filtered water or filtrate via the input channel 1 . The secondary slurry forms a layer of material on the filter surface of the filter 2 which collects from the filtrate the fibers entrained therein. and is discharged in a conventional manner together with the short fiber fraction; the auxiliary stock is fed to the filter 2 through a bypass channel 3 . The water separated from the filter 2 is conveyed through an output channel 4 to a suitable place, for example, back to the paper making process, or to a waste water treatment plant. The slurry separated from the filtering surface of the filter 2 is sent to a sorting device 5 to be sorted into a short fiber fraction and a long fiber fraction. The staple fiber fraction is conveyed back to the papermaking process through the feed channel 6 . The long fibers are ...

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Abstract

In a papermaking process, filtering of white water containing fiber material is performed by feeding the white water to a filter on a surface of which a layer of auxiliary pulp has been formed, such that the white water is filtered through the layer of auxiliary pulp and fiber material in the white water remains in the layer of auxiliary pulp. The mixture of auxiliary pulp and fiber material is removed from the filter and is fed to a fractionating screen. The screen separates the mixture into a short-fibered pulp fraction that can be returned to the papermaking process, and a long-fibered pulp fraction that is returned to the filter where it is used as auxiliary pulp to form a layer on the filter surface.

Description

technical field [0001] The present invention relates to a method for recovering fibers from white water of the papermaking process, which is separated from the slurry mixture used in the papermaking process in different stages of the papermaking process; in the method of the invention, the white water contains fibrous material, And it is sent to the filter together with the separated auxiliary slurry, so that the material layer is formed by the auxiliary slurry on the filter surface of the filter, and while the white water flows through the material layer, the fiber material remains in the layer formed by the auxiliary slurry In the material layer; where the mixture of fibrous material and auxiliary slurry is extracted from the filter surface, the fibrous material separated from the white water is returned to the papermaking process. [0002] The invention also relates to an apparatus for recovering fibers from white water in a papermaking process, comprising a filter having a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D33/04B01D33/073B01D36/02B01D37/02D21F1/66D21F9/00
CPCB01D33/073D21F9/006D21F1/66B01D36/02B01D37/02B01D33/042Y10S210/928B01D33/275B01D33/41B01D33/70B01D33/705
Inventor 韦萨·朱蒂南蒂莫·帕卡里南
Owner METSO PAPER INC
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