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Repulping apparatus used for decomposing fiber material and method thereof

A fiber material and fiber technology, applied in the field of pulper system, can solve the problems such as the dependence of pulp concentration on decomposition efficiency, and achieve the effect of increasing pulp concentration

Inactive Publication Date: 2015-05-20
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The advantage of the drum pulper is that it generally has a high sorting capacity, but the dependence of the disintegration efficiency on the pulp consistency of the fiber suspension fed to the drum pulper is hindered

Method used

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  • Repulping apparatus used for decomposing fiber material and method thereof
  • Repulping apparatus used for decomposing fiber material and method thereof
  • Repulping apparatus used for decomposing fiber material and method thereof

Examples

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Embodiment Construction

[0024] exist figure 1 A side view of a very simplified drum pulper 1 with a rotatable drum 2 is schematically shown in . A feeder 4 is provided in the drum pulper 1 , through which a fibrous web suspension or a mixture of material to be disintegrated and water is fed into the drum pulper 1 . In the drum 2 of the drum pulper 1 there is provided an input 3 aligned with the feeder 4 through which the fiber suspension to be fed into the drum pulper 1 reaches the interior of the drum 2 . At the opposite end of the drum 2 there is an outlet 5 through which waste residues discharged from the drum pulper 1 are removed from the interior of the drum 2 for further processing.

[0025] The fibrous material contained in the fibrous suspension is disintegrated in the drum pulper 1 . Usually in the drum pulper 1 the fibrous material is decomposed in such a way that it is substantially in a horizontal direction (eg figure 1 shown) or from the input end 3 to the output end 5 slightly downwa...

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Abstract

The pulper (1) has a rotatable drum (2) comprising a dissolving portion (7) to dissolve a fiber material that is contained in a fiber mass suspension and supplied into the pulper. A washing part (8) recovers fibers from the fiber material dissolved in the dissolving portion. The drum comprises a thicken-part (6) for increasing material density of the fiber mass suspension. The thicken-part in the drum is arranged on a side of an upper flow in flow direction of the fiber mass suspension with respect to the dissolving portion. The thicken-part is provided with gap-like apertures (10). An independent claim is also included for a method for dissolving a fiber material.

Description

technical field [0001] The present invention relates to the treatment of fibrous material, in particular recycled fibrous material, for the production of paper or board, and a pulper system for breaking down fibrous material when processing fibrous material. Background technique [0002] In order to reuse recycled fiber material such as old cardboard or mixed used paper, it is necessary to decompose the recycled fiber material used for paper or cardboard production. The disintegration of recycled fiber material is usually carried out in a pulper system having at least one primary pulper to which the fiber material is conveyed. The fibrous material is broken down in the main pulper and mixed with water added to the main pulper to form a mixture of fibrous material and water, the pulp suspension. A sieve plate is set at the bottom of the main pulper; the qualified product (Akzept) that passes the sieve plate, i.e. the qualified fiber residue that can be used for paper or boar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/32D21B1/34
CPCD21B1/32D21B1/345D21C5/02Y02W30/64D21B1/34
Inventor 托尼·皮里宁汉努·赛科宁
Owner VALMET TECH OY
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