Low Consistency Pulp Cleaning Systems: Removing Lightweight Contaminants Effectively | Leizhan

Low Consistency Cleaning Is the Final Barrier Before the Paper Machine

Low consistency cleaning systems operate at 0.6-1.2% stock consistency using hydrocyclone principles to remove lightweight contaminants — plastic specks, stickies, hot melts, and wax particles — that passed through upstream screening. A properly designed cleaner bank achieves 85-95% removal efficiency for particles in the 50-500 micron range.

FAQ

What is the difference between forward and reverse cleaners?

Forward cleaners remove heavy contaminants (sand, metal); accepts exit from the top. Reverse cleaners target lightweight contaminants (plastics, stickies); accepts exit from the bottom. A combined system with both achieves the highest cleanliness.

How much pressure drop is needed across a cleaner?

1.2-1.8 bar pressure drop is optimal. Below 1.0 bar reduces separation efficiency; above 2.0 bar wastes pump energy without proportional cleaning improvement.