Energy Consumption and Pulp Properties in Mechanical Pulping Using Adjustable Speed Drive, 1996 Pulping Conference Proceedings

Peter X. Long & Jeffery S. Hsieh

Georgia Institute of Technology

Mechanical pulping is a high-yield pulp production process. However, due to its high energy consumption and less superior pulp properties, traditionally, mechanical pulp has been traditionally used in lower grade paper. The objective of this research was to investigate the possibility and potential of saving energy and retaining pulp properties at the same time using adjustable speed drive (ASD). Specific energy and final pulp properties, i.e., freeness, brightness, opacity, tensile, burst, and tear, were monitored for all the trials. All the handsheets were tested according to the TAPPI standards. 20% to 25% energy saving were generally observed during all the trials. The pulp qualities retained very much same. The mechanism of high intensity refining is discussed. In conclusion, ASD can be a very useful and economic tool in mechanical pulp manufacturing industry. Combining with chemical treatment and other online sensor, the pulp properties can be improved. This will also provide a good opportunity for mechanical pulp to gain a bigger share in the future pulp market.