A Novel Unit Operation to Remove Hydrophobic Contaminants, 19PEERS

For mills making paper with recovered fiber, removal of hydrophobic contaminants is essential for trouble-free operation of papermachines. Significant cost savings on paper machine operation can be achieved by reducing deposits, which results in better quality, reduced downtime, increased fiber yield, and reduced energy consumption. 

Bubble nucleation neparation (BNS) is a relatively new process for removing hydrophobic particles. When vacuum is applied to a slurry, dissolved gas bubbles nucleate on hydrophobic particles and drag them to the surface for easy removal. We constructed a 16 liter batch unit to evaluate the effect of operating parameters on removal of hydrophobic particles, using statistical design of experiments. These results were used to guide our design of a 16 liter continuous unit. We tested this unit on laboratory and mill samples. The removal of 60-80% of hydrophobic particles achieved with a low reject rate, < 2%. 

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.