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Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with a reinforcing frame

A technology of cellulose pulp and pulp washing, applied in the direction of washing/replacing pulp treatment liquid, etc., can solve the problems of cost increase, transportation difficulties, etc., and achieve the effect of reducing static weight, less materials, and simple structure

Active Publication Date: 2013-03-13
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-capacity overhead cranes are required, transportation becomes more difficult and costly, and construction requires very heavy foundations and supporting cables to handle such a large dead weight

Method used

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  • Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with a reinforcing frame
  • Arrangement for the treatment of cellulose pulp in a washing apparatus arranged with a reinforcing frame

Examples

Experimental program
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Embodiment Construction

[0019] Figures 1A-B and Figure 2 show the main parts of a washing plant for washing cellulose pulp according to the pressure removal washer type. The washing unit comprises a rotatable drum 2 provided with a plurality of external compartments 4 with a bottom 6 made of perforated metal, the pulp to be washed is removed during an on-drum feed placed in these compartments. The compartments 4 are delimited by compartment walls 8 arranged axially along the entire axis 10 of the drum and distributed along the circumference 12 of the drum. The washing unit comprises a fixed support structure 14 with two opposing transverse beams 16 . The drum 2 extends between two transverse beams and is rotatably journalled on these two transverse beams 16 of the support structure. A fixed cylindrical casing 18 having two opposing gables 19 surrounds the drum 2 so as to define an annular space 20 between the casing 18 and the drum 2 (see FIG. 3 ).

[0020] Washing liquid is fed to the annular spa...

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Abstract

The present invention relates to a washing apparatus for washing of cellulose pulp comprising: a rotatable drum ( 2 ), a stationary support ( 14 ), a stationary cylindrical casing ( 18 ), that encloses the drum, whereby an annular space ( 20 ) is defined between the casing and the drum, a number of seals ( 22 ) that are arranged on the casing and that seals between the casing and the drum, such that the annular space is divided in a formation zone (F), at least one washing zone (T 1 , T 2 ), and a discharge zone (U), and at least a reinforcing frame rib ( 24 ), that is attached to the casing. The reinforcing frame rib ( 24 ) extends around the entire casing ( 18 ) for fixing the casing in a predetermined form, whereby detrimental deformation of the casing ( 18 ), when washing the paper pulp at overpressure, is prevented.

Description

technical field [0001] The invention relates to a pulp washing device for washing cellulose pulp. Background technique [0002] All fiber lines include some sort of washing equipment to separate the cooking liquor from the pulp. A pulp washing unit is included at a later stage of the process to separate the bleaching liquor after the bleaching stage. There are many different types of pulp washer operating according to various principles. [0003] A well-known washing device is the drum washer, in which the pulp is dewatered on a rotatable filter drum after addition of washing liquor, so that it is possible to remove the Liquid remaining in the pulp web after previous processing stages of the same type. Static pressure causes the removed liquid to pass through a perforated metal plate set on a rotatable drum. Another development of the original drum washer is the pressure removal washer, in which overpressurized filtrate is passed through metal plates. Increased pressure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C9/06
CPCD21C9/06
Inventor R・安德森J・白兰德M・亨里克松J・T・伦德伯格
Owner METSO PAPER INC
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