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Method for reducing adhering impurities in paper production

A sticky, impurity technology, applied in the direction of papermaking, paper machine, textile and papermaking, etc., can solve the problems of rising cost burden, adding extra load, etc., and achieve the effect of reducing paper quality problems

Inactive Publication Date: 2012-03-14
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often these auxiliary materials are overmetered, which leads to an increased cost burden and an additional load (pollution) on the production cycle

Method used

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  • Method for reducing adhering impurities in paper production
  • Method for reducing adhering impurities in paper production
  • Method for reducing adhering impurities in paper production

Examples

Experimental program
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Embodiment Construction

[0047] figure 1 A schematic diagram of a paper making plant 1 as used in today's paper mills is shown. After dilution with water in a ratio of approximately 1:100, the fibrous material or fibrous material together with auxiliary materials is applied to a screening device 9 with a screen 10 . The material of the fibers is deposited on the screen 10 side by side and one after the other. The circulating water 23 can be discharged or drawn off by means of a plurality of suction chamber regions 24 and returned in the direction of flow S into the circulation of the circulating water 23 . As raw material, for example waste paper 30 and pulp (Zellstoff) usually in dry form are delivered to the paper mill, while wood pulp is usually produced in the same mill and as a fiber / water mixture, i.e. composed of non-interwoven fiber material The suspension is pumped into the material center 3. Described waste paper 30 dissolves in fiber tank or waste paper dissolving device 35 under the sit...

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PUM

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Abstract

The invention relates to a method for reducing adhering impurities in a starting material (30) or an intermediate product (39) in aqueous suspension or in a circulation of water (23) in paper production. The object of avoiding the adhering impurities without the addition, or with a greatly reduced use, of additives is achieved by the starting material (30) or the intermediate product (39) being brought into contact with preferably non-thermal plasma at least atmospheric pressure.

Description

technical field [0001] The invention relates to a method for reducing sticky impurities in raw materials or intermediate products in papermaking. Background technique [0002] During the recycling of waste paper as raw material, for example, "stickies" dissolved and finely decomposed from the waste paper enter the papermaking plant. "Stickies" is the name given to fine hot-melt adhesive-or adhesive-impurities, which later appear as defects in the paper or, for example, as disturbing spots in the cardboard. Especially in waste paper processing, the water used for this is very polluted. Viscous impurities present in the fibrous material or in fiber suspensions as intermediate products and in the general circulation water of papermaking plants tend to deposit, for example, on paper machine coverings such as felts and screens as well as drums and rolls. Furthermore, they lead to defects in the finally produced paper which, for example, can interfere with further processing or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/00
CPCD21C9/08D21H21/02D21F1/66D21F1/00
Inventor F·斯佩斯
Owner SIEMENS AG