JIANG Dongxu, YANG Guanghui, LIN Tao, SONG Wuchun, CHEN Haiyan, LIN Longyuan

(School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China)

Abstract：In order to study the electrostatic influence factors of polyvinyl chloride (PVC) powder commonly used in industry during pneumatic conveying, this paper takes PVC powder as the conveying object, and takes charge mass ratio as the index to explore the influence of PVC powder’s feeding speed, air flow speed, the mass of the pwder contained in the unit volume of gas and ball valve opening on powder electrification. The results show that when the feeding speed is constant, the charge mass ratio of PVC powder increases with the increasing of airflow speed and decreases with the decreasing of ball valve opening. When the airflow speed is constant, the charge mass ratio of PVC powder decreases with the increasing of the feeding speed, but there is a critical value of the charge mass ratio of conveying particles, which is 0.2 μC/kg. When the the mass of the pwder contained in the unit volume of gas is constant, the charge mass ratio of PVC powder decreases with the increasing of blanking speed and airflow speed. When the feeding speed is constant, the charge mass ratio of PVC powder decreases with the decreasing of ball valve opened.

Keywords：polyvinyl chloride powder; pneumatic conveying; electricity; charge mass ratio

Get Citation：JIANG D X, YANG G H, LIN T, et al. Factors affecting electrification of PVC powder in pneumatic conveying[J]. China Powder Science and Technology, 2023, 29(4):94-99.

DOI：10.13732/j.issn.1008-5548.2023.04.009

Received：2022-09-17,Revised：2022-12-07,Online：2023-06-08 15:03。

Funding Project：四川省科技计划资助项目,编号:2023YFS0362。

First Author：江东旭(1996—),男,硕士研究生,研究方向为气力输送。 E-mail: 454683242@qq.com。

Corresponding Author：林龙沅(1981—),男,博士,教授,硕士生导师,研究方向为气流粉碎、分级与通风除尘。E-mail: LLy7572@126.com。