Powerful, Compact Low Consistency Refiner Uses Less Energy
August 1, 2010 By Pulp & Paper Canada
The refining stage in stock preparation plays a crucial role in developing fibre properties for paper production, greatly affecting the runnability of the paper machine and paper quality. Unlike conve…
The refining stage in stock preparation plays a crucial role in developing fibre properties for paper production, greatly affecting the runnability of the paper machine and paper quality. Unlike conventional refiners, Metso’s new low consistency refining concept, OptiFiner Pro, feeds the stock evenly across the bars directly in the refining zone where fibre treatment occurs. All of the stock is treated equally, providing a higher refiner loadability and better energy efficiency. In its optimal configuration, one OptiFiner Pro can replace two traditional refiners and still deliver 40% electrical energy savings.
The new design is suitable for all kinds of LC refining applications including short hardwood fibres as well as recycled fibres requiring fibrillation at low refining intensities.
In conventional refining, fibres have to travel the full length of the refining zone and suffer excessive impacts leading to increased fines, weakening of the refined fibres and inefficient delivery of energy to the fibre. The new OptiFiner Pro increases the number of fibres that receive proper refining treatment and, because of the high utilization of the whole refining area and all refining bar lengths, refiner treatment intensity is much higher than any other refiner.
OptiFiner Pro uses a smaller rotor because of the improved fibre flow, reducing the no-load power by almost half. The design permits higher installed power and throughput, further raising the refining efficiency.
The improved performance of OptiFiner Pro enables refining with a reduced number of more compact refiners, thus reducing investment and maintenance costs significantly.
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