Varying annular fluidization zone for increased mixing...

Details Varying annular fluidization zone for increased mixing... Varying annular fluidization zone for increased mixing...

B - Operations, Transporting

01

F

B01F 5/00 (2006.01) B01F 7/00 (2006.01) D21B 1/34 (2006.01) D21C 3/00 (2006.01)

Patent

CA 2131461

2131461 9317782 PCTABS00025 Medium consistency (e.g. about 5-18 %) paper pulp is mixed with a treatment fluid by fluidizing them while subjecting them to a constantly changing shear field in radial (17) and axial (15) planes. This is accomplished by providing a mixer rotor (12) having a constantly varying cross-section along a dimension of elongation (26). The rotor (12) may comprise a body (25) having an external surface simulating alternately oriented cone frustums (29) along its axis of rotation (36), with vanes (32) connected to the external surface and including portions (33) following the surface contour. A disk (40) may or may not be provided at the end of the body (29) connected to a shaft (13). A first interior housing portion (16) has a configuration (44) mimicking that of the rotor (12), while a second housing portion (18) defines a fluidization zone with the disk (40).

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