A DYNAMIC-MODEL OF THE INTERACTION BETWEEN THE CHEMICAL-REACTIONS ANDTHE RESIDENCE TIME IN A CONTINUOUS DIGESTER

A dynamic model describing the transfer of mass, momentum, and energy for a continuous digester improves the understanding of the process an d the complex interactions between the vertical motion of the mass and the chemical reactions. The model can potentially predict kappa numbe r, the compaction of chips, and the chip level. It might therefore hav e use in predictive simulation to aid process operators. Simulating op erating conditions of an industrial continuous digester have verified the model.