エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
ISSN-L : 0912-2834
特集「乾式粉体プロセスにおける微粒子の帯電現象およびその応用」
接触電位差および粒子分散器が固気2相流中における接触帯電に及ぼす影響
田之上 健一郎西村 龍夫増田 弘昭
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ジャーナル フリー

2013 年 28 巻 4 号 p. 251-256

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This paper reviews the tribo-electrification of particles in solid-air two-phase turbulent flow with a particle feeder, an ejector, a stainless-steel branch pipe and a stainless-steel straight pipe. An unexpected charge transfer occurred between the ejector and the branch pipe, which could not be explained solely by the contact potential difference. In the ejector, an electrical current in air might be produced by the self discharge of particles with an excess charge between a nickel diffuser in the ejector and a stainless steel nozzle or the stainless steel pipe due to a reversal in the contact potential difference between particles and the stainless steel. When dual coaxial glass pipes were used as a particle disperser, the specific charge of the Polymethylmethacrylate particles became more positive along the particle flow direction due to the contact potential difference between a material of the particle and the stainless steel.

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© 2013 日本エアロゾル学会
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