Evaluation of Separation Efficiency in a Tubular Bowl Centrifuge

Abstract

Centrifugal sedimentation, a well-known solid-liquid separation process, is typically used for the separation of solids from low concentration feeds because of its high separation efficiency due to high settling velocities. The performance of the tubular bowl centrifuge (TBC) can be studied by using the sigma theory, which assumes plug flow and rigid body motion inside the rotating bowl wall. The separation efficiency of the system is evaluated by determining the effective fluid layer thickness from the experimental data. A method suitable for evaluating the separation efficiency at different parameters for a given TBC is explained along with experimental validation. By using this method, different case studies are performed which depict the influence of each parameter on the separation efficiency. Also, it is demonstrated that the same higher separation efficiency (98 %) at 20 000 rpm could be achieved at higher bowl capacities.

Design and Multi-objective Optimization of Vibro-Pneumatic Separator for Paddy Pre-Cleaning using RSM

“…To separate contaminants from paddy, one may utilizes the mechanical aspect of paddy and contaminant. Pneumatic separator effectiveness for paddy pre-cleaning process is based on several parameters, such as paddy and contaminant properties, separation efficiency, and its usage flexibility [1]. Each type of grain has physical and and mechanical properties that lead to different setup requirement of pneumatic separation machining process.…”