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High Efficiency Centrifugal Air Classifiers

From lab to production, the AVEKA CCE Centrifugal Air Classifier is designed to separate fine particles in the less than 75µm range utilizing the opposed forces of centrifugal and drag in close proximity to a high intensity dispersion mechanism. The Classifier incorporates an optimized feed introduction which maximizes the effectiveness of the dispersion forces and minimizes distortion of the particle trajectories within the vortex field. This allows the classifier to achieve a precise, predictable, and extremely sharp separation at a high solids loading. The Model 100 Classifier system is the ideal tool for the production of lab size samples, product development and/or small quantity production. Both the Model 250 and 500 offer the laboratory precision at production rates.

Operating Principle:
The air and solids flow patterns through the AVEKA CCE Classifier are shown in the image to the right (see image). The classifier housing serves as a plenum into which the metered primary air is introduced through the inlet duct. This air enters the classifier rotor through the narrow gap between the tip of the two rotor halves and the stator. These opposing high velocity streams form a turbulent dispersing zone. Feed enters the system through the central tube, which is angled to the radial to minimize the distance of coarse particle injection into the vortex due to inertia. The space between the outer edge of the blades and the periphery of the rotor forms the classification zone. Coarse product, which is rejected outward by the centrifugal field, is conveyed out of the classifier through the coarse outlet using a jet pump mounted on a cyclone. The cyclone overflow is returned to the classifier through the recycle port. Fine product leaves the classifier through the central outlet with the primary air flow.