Secondary fiber fine screen system

A secondary fiber, fine screening technology, applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of quality reduction, poor screening efficiency, fiber loss, etc., to reduce fiber loss, ensure pulp quality, high fiber quality effect

Active Publication Date: 2014-05-14
ANDRITZ CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Larger slot widths of course lead to fiber loss and poor screening efficiency, which means that the quality of the final pulp is also reduced

Method used

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  • Secondary fiber fine screen system
  • Secondary fiber fine screen system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a secondary fiber fine screening system includes a first fine screening device 10, a second fine screening device and a third fine screening device 30, the input end of the first fine screening device 10 is connected with an input pipeline 60, and the first fine screening device 10 is connected with an input pipeline 60. The slag discharge end of the first fine sieve device 10 and the slurry discharge end of the third fine sieve device 30 are all connected to the input end of the second fine sieve device 20 through pipelines, and the slag discharge end of the second fine sieve device 20 is also connected through the pipeline. The road is connected to the input end of the third fine screening device 30, and the pipeline between the slag discharge end of the first fine screening device 10 and the input end of the second fine screening device 20 is marked as the first delivery pipeline 70, and the pipeline between the second fine screening device ...

Embodiment 2

[0040] Such as figure 2 As shown, a secondary fiber fine screening system includes a first fine screening device 10, a second fine screening device 20 and a third fine screening device 30, the input end of the first fine screening device 10 is connected with an input pipeline 60, The slag discharge end of the first fine sieve device 10 and the slurry discharge end of the third fine sieve device 30 are all connected to the input end of the second fine sieve device 20 through pipelines, and the slag discharge end of the second fine sieve device 20 is also passed through The pipeline is connected to the input end of the third fine sieve device 30, and the pipeline between the slag discharge end of the first fine sieve device 10 and the input end of the second fine sieve device 20 is denoted as the first delivery pipeline 70, and the pipeline with the second fine sieve device 20 The pipeline between the slag discharge end of the second fine screening device 20 and the input end o...

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PUM

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Abstract

The invention discloses a secondary fiber fine screen system which comprises at least two fine screen devices which are sequentially connected through a conveying pipe. Each fine screen device is respectively provided with the input end, the thick liquid discharging end and the slagging end, the input end of the fine screen device on the most front portion is connected with input pipes, the slagging end of the fine screen device of the two adjacent fine screen devices in the front is connected with the input end of the fine screen device at the back through the conveying pipe, and the thick liquid discharging end of the at least one fine screen device is connected with the input end of the fine screen device of the two adjacent fine screen devices in the front through a pipe. A fiberizer is installed on the input pipe and / or the conveying pipe. According to the secondary fiber fine screen system, the fiber loss can be reduced, and the high fiber quality can be kept.

Description

technical field [0001] The invention relates to a secondary fiber fine screening system. Background technique [0002] For paper pulp, pulp obtained directly from fiber raw materials (usually wood) is called virgin fiber or primary fiber, and pulp obtained from waste paper is called recycled fiber or secondary fiber. [0003] Fine screen is usually used in fiber recycling to improve the quality of pulp, and its main function is to remove impurities in pulp, such as plastic chips, stickies and large particle stains. Screens of this type are usually arranged in sections when used in order to minimize fiber loss. The slurry in the last stage usually also contains a certain amount of fiber bundles. In order to reduce the fiber loss caused by the fiber bundles, sometimes the fiber deflaker is used before the last stage of fine screening. This use has achieved some success. [0004] However, there is also a problem with the use of this type of deflaker. Usually the working gap o...

Claims

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Application Information

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IPC IPC(8): D21D5/02
CPCD21D5/02
Inventor 亚历山大·葛帅德
Owner ANDRITZ CHINA
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