The Research on Characteristics of Flow Field of Stirred Pulp-mixing

To achieve the summary of characteristics of flow field of stirring pulp-mixing, starting from the study of mixing characteristics of typical axial flow field and radial flow field, we analyze the mainstream cycle characteristics and desperate secondary flow loop pattern -- large axial cycle is axial-flow secondary flow loop; axial double loop is radial-flow secondary flow loop -- of the two kinds of flow fields by decoloration. We can see through the analysis of amount of power dissipation and parameters of the mixing time, that while radial flow field undergoes rapid mix-up more easily, it costs more energy than axial flow field. Solid-liquid two-phase experiment was taken to imitate the actual process of pulp-mixing. We can see through the analysis of distribution of materials in the tank under different mixing mechanism, that concentration of materials in stirred tank decreases mainly along the axial direction; the influence of not fully mixed section of axial flow field is less than radial flow field. The characteristics of stirred flow field have been analyzed by corresponding numerical simulation.