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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 8, 2002
Accepted October 1, 2002

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Design and Performance Evaluation of Triboelectrostatic Separation System for the Separation of PVC and PET Materials using a Fluidized Bed Tribocharger

Jae-Keun Lee^† Jin-Hyouk Shin

School of Mechanical Engineering, Pusan National University, San 30, Changjeon-Dong,Keumjeong-Ku, Busan 609-735, Korea

Korean Journal of Chemical Engineering, May 2003, 20(3), 572-579(8), 10.1007/BF02705568

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Abstract

A triboelectrostatic separation system using a fluidized-bed tribocharger for the removal of PVC material in the mixture of PVC/PET plastics was designed and evaluated as a function of tribocharger material, air flow rate, electric field strength, and the mixing ratio of two-component mixed plastics. The test system consists of the fluidized-bed tribocharger, a separation chamber, a collection chamber and a controller. PVC and PET particles can be imparted negative and positive surface charges, respectively, due to the difference in the work function values of plastics_x000D_ suspended in the fluidized-bed tribocharger, and can be separated by passing them through an external electric field. Experimental results show that separation efficiency is strongly dependent on the tribocharger material, electric field strength and particles mixing ratio. In the optimum conditions of 150 l/m air flow rate and 2.6 kV/cm electric field strength, highly concentrated PVC (99.1%) can be recovered with a yield of more than 95% from the mixture of PVC and PET materials for a single stage of processing.

Keywords

PVC/PET Electrostatic Separation Fluidized-bed Tribocharger Tribocharger Material Air Flow Rate Electric Field Strength Mixing Ratio

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