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Pulping process of waste paper

Release time:2020-11-20 browse:820 number

  The products from waste paper pulping can be divided into natural color pulp and bleached pulp. In the production of natural color pulp, the pulping process mainly includes waste paper disintegration, purification and removal of heat soluble matter. Deinking is added to bleached pulp.

  The pulping process of common waste paper is as follows

  1. After unpacking and removing the iron wire, the waste paper is transported by the plate conveyor to the hydraulic pulper for crushing. The hydraulic pulper carries out beating and deinking on the waste paper, and the pulp after beating and deinking flows into the pulp pool

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  2. The pulp is lifted from the pulp pool to the high-frequency vibrating screen by the pulp pump, and the high-frequency vibrating screen plays the role of screening and separating impurities; the screened pulp flows into the pulp pool

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  3. The pulp is lifted from the pulp pool to the rotary screen thickener by the pulp pump. The rotary screen thickener is mainly used to increase the lower concentration of the pulp through concentration, which can achieve the purpose of washing the pulp at the same time. The concentrated pulp flows into the pulp pool

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  4. The pulp is lifted into the rinsing machine by the pulp pump to clean and bleach the pulp; the bleached pulp flows into the pulp pool automatically

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  5. The pulp is lifted into the refiner by the pulp pump, and then grinded into fine pulp by the refiner and automatically flows into the pulp pool

  6. The pulp is lifted into the sand table by the pulp pump, and the sand ash and other impurities are precipitated and separated by the sand table to make pure pulp

  7. The pulp is lifted into the pressure box by the pulp pump, and the function of the pressure box is to adjust the pulp concentration

  8. After the pulp is adjusted by the pressure box, and then the impurities are removed by the desilting pump, the pulp is sent to the stabilization box, and the pulp is made into pure pulp after the pulp is adjusted again.