Fluidized Bed Device for Plastic Granules Triboelectrification
Fluidized Bed Device for Plastic Granules Triboelectrification
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DOI：
10.1080/02726350701257782
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发表时间：
2007-03
影响因子：
2.5
通讯作者：
L. Calin;A. Mihalcioiu;A. Iuga;L. Dascalescu
中科院分区：
文献类型：
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作者：
L. Calin;A. Mihalcioiu;A. Iuga;L. Dascalescu
摩擦起电过程的研究是静电分离在塑料回收领域成功工业应用的关键因素。因此，本工作的目的是为该过程的实验室研究评估一个原始装置。原设计的流化床式摩擦起电装置具有以下显著特点：(1)透明壁，可观察流化过程和摩擦起电模块内颗粒的运动；（ii）与颗粒大小相关的不同网孔的空气分布器；（iii）用其他金属（铝，铜）或非金属（聚氯乙烯- pvc，聚乙烯- pe和聚对苯二甲酸乙二醇酯- pet）快速替换摩擦电气化有机玻璃室；（四）使用自由落体静电分离器进行颗粒电荷测量或综合操作的静电分离实验的可能性。电荷测量实验的结果指出了两种类型的颗粒（聚苯乙烯和低密度聚乙烯）与装置壁接触时的不同摩擦电行为。对mm级聚苯乙烯/聚乙烯颗粒二元混合物进行了静电分离实验，证实了摩擦起电装置的有效性。
The study of the triboelectrification process is the key factor to the successful industrial application of electrostatic separation in the field of plastics recycling. Therefore, the aim of the present work is to evaluate an original device for the laboratory study of this process. The original design of the fluidized bed type triboelectrification device has the following distinctive features: (i) transparent walls to observe the fluidization process and the particles moving in the triboelectrification module; (ii) air distributors with different mesh apertures correlated with granule size; (iii) quick replacement of the triboelectrification Plexiglas chamber with other metallic (aluminium, copper) or nonmetallic chambers (polyvinyl chloride—PVC, polyethylene—PE, and polyethylene terephthalate—PET); (iv) possibility of independent operation, for granule charge measurement or integrated operation, for the electrostatic separation experiments using a free-fall electrostatic separator. The results of charge measurement experiments pointed out the different triboelectric behaviour of two types of granules (polystyrene and low-density polyethylene) in contact with the walls of the device. The electrostatic separation experiments carried out on a binary mixture of mm-size polystyrene/polyethylene granules confirmed the effectiveness of the triboelectrification device.