Pressure Screen in Pulp Screening Line

The pressure screen is a core unit in the approach flow system, positioned after pulping to remove contaminants (sticks, plastics, shives) while protecting the paper machine headbox. It ensures uniform fiber suspension, reduces sheet defects, and improves final paper quality.

Common Pressure Screen Problems & Fixes:

Frequent plugging of screen basket – Caused by high feed consistency or oversized contaminants.
Solution: Install a coarse screen before the pressure screen and maintain inlet consistency below 1.5%.

High motor current or overload – Often due to rotor wear or blocked reject outlets.
Solution: Inspect rotor and replace worn parts; clean reject orifices regularly.

Poor screening efficiency (accepts contain impurities) – May result from incorrect slot/hole size or low pressure differential.
Solution: Select appropriate basket specification and adjust pressure difference to 0.03‑0.05 MPa.

Excessive wear on rotor and basket – Caused by abrasive particles or heavy impurities.
Solution: Install heavy‑impurity cleaner upstream and use wear‑resistant materials (e.g., stainless steel with hardening treatment).

Our energy‑saving JNS series pressure screen features an up‑flow design that reduces rotor and basket wear, lowers power consumption, and offers easy maintenance. With capacities from 180 to 800 t/d, hole/slot baskets for various pulp types, and robust stainless steel construction, it delivers reliable performance and long service life. Contact us today for a tailored solution. Email: leizhanworld@gmail.com.