Patent ID: 6077396
Filing Date: 2000-06-20
Classification: D21C

Abstract:
A pulp fluffing contactor comprising:a cylindrical shell having a solids inlet adjacent one end and a solids outlet adjacent an opposite end and a gas inlet for introducing a gas into said shell;a cylindrical rotor mounted for rotation within said shell of sufficient diameter to form a restricted annular space of convenient axial length;said rotor being further provided with a plurality of radially outward extending projections subscribing a rotary path for imparting a circumferential swirl to sold fibrous material introduced within the shell;said shell being further provided with a plurality of guide foils projecting into said annular space intermediate the rotary paths subscribed by said projections and oriented generally parallel to said rotary paths;said guide foils further comprise a first combing portion and a second axially directing portion set at an arcuate angle to said rotary paths for axially directing said circumferential swirl; andeach guide foil combing portion having a leading edge being set at a substantially right angle from a tangent of a surface of the cylindrical shell and the second foil portion being structured to impart a slight lifting as the pulp flows past the surface.