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Method and apparatus for screening waste paper pulp

A technology for filtering pulp and waste paper pulp, which is applied in the field of filtering waste paper pulp, and can solve the problems of increased equipment size and cost, and high power of the filtration system

Inactive Publication Date: 2002-12-25
IHI CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] From the above content, it can be clearly known that the more filter screens with graded treatment, the higher the degree of filtration and the increase in output, but the disadvantage is that the size and cost of the equipment will increase, and the power required for the filter system to work will also increase. higher

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  • Method and apparatus for screening waste paper pulp
  • Method and apparatus for screening waste paper pulp
  • Method and apparatus for screening waste paper pulp

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Embodiment Construction

[0032] image 3 and Figure 4 The device for filtering waste paper pulp according to the first embodiment of the present invention is shown, which device comprises a housing 1, which is in image 3 The lower left, upper left and middle right have pulp inlet 2, waste outlet 3 and receiving raw material outlet 4 respectively. The housing 1 also carries a rotor 5 driven by a drive unit (not shown).

[0033] The rotor 5 includes a driving force transmission shaft 5a and a hollow cylindrical body 5b integrally connected to one end of the shaft 5a at its bottom. The axial length of the cylinder 5b is approximately equal to the distance between the inlet 2 and the outlet 3 . The cylinder 5 b has an open end near the outlet 3 and a closed end near the inlet 2 . On the outer circumference of the cylinder 5b near the closed bottom there are pulp discharge outlets 6 arranged at a circumferential distance from each other. There are also scrapers 7 (pulp moving means) on the outer cir...

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PUM

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Abstract

A housing has a pulp inlet, a screen outlet and a resulting stock outlet and is provided with a rotor. The rotor has a hollow cylinder provided with scrapers on its outer circumference. Filter plates are arranged on the outside of the scraper, and they mutually form a channel facing the filter plates. The hollow cylinder is formed with a pulp outlet. Pulp is circulated inside and outside the hollow cylinder by rotation of the hollow cylinder, so that separation of pulp to form the resulting raw material and rejects is repeated through the filter plate.

Description

technical field [0001] The present invention relates to a method and apparatus for filtering waste paper pulp to separate impurities from pulp raw materials in industries using waste paper pulp as raw material, such as the pulp and fibreboard industry. Background technique [0002] In this industry, using waste paper as a raw material for paper, it will be inevitable to separate and remove various impurities such as waste plastics, vinyl ropes, and adhesive glue on impurities that are produced during the waste paper recycling process. was mixed in. [0003] Generally, impurities of large size and / or shape that differ significantly from the pulp fibers can be removed by means of so-called screen devices. [0004] The widely used strainer device is a closed pressurized device with a filter inside, and the filter has a plurality of small holes. The efficiency or rate at which a filter removes impurities is closely related to the screen's rejection rate (ie, the ratio of the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D5/02D21D5/06
CPCD21D5/026D21C5/02
Inventor 岩重尚之
Owner IHI CORP