Paper making pulp flow pressure screen

The impurities in recycled pulp are divided into two parts: light impurities and heavy impurities. The traditional pressure screen is fed from the top and discharged from the bottom. Both light and heavy impurities pass through the entire screening area. When processing chemical slurry, the specific gravity and mass of impurities in the slurry are generally greater than those of a single fiber. This structure is conducive to reducing the residence time of impurities in the equipment. But when dealing with recycled pulp, which contains a large amount of light impurities with low specific gravity, it will greatly prolong the residence time of light impurities in the equipment, resulting in a decrease in screening efficiency and increased wear and even damage to the rotor and screening drum.

Paper making pulp flow pressure screenThe upward flow structure design with bottom slurry inlet, bottom heavy slag discharge, and top light slag discharge effectively solves the above problems. Light impurities and air in the slurry naturally rise to the top slag discharge outlet and are discharged, while heavy impurities can settle to the bottom and be discharged as soon as they enter the machine. In this way, on the one hand, it effectively shortens the residence time of impurities in the screening area, reduces the possibility of impurity circulation, and improves the screening efficiency; On the other hand, it prevents damage to the rotor and screen drum caused by heavy impurities, extending the service life of the equipment.