江东旭, 杨光辉, 林 涛, 宋戊春, 陈海焱, 林龙沅

（西南科技大学 环境与资源学院, 四川 绵阳 621010）

引用格式：江东旭, 杨光辉, 林涛, 等. 气力输送中PVC粉体带电影响因素[J]. 中国粉体技术, 2023, 29(4): 94-99.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

收稿日期：2022-09-17，修回日期：2022-12-07，在线出版时间：2023-06-08 15:03。

基金项目：四川省科技计划资助项目,编号:2023YFS0362。

第一作者简介：江东旭(1996—),男,硕士研究生,研究方向为气力输送。 E-mail: 454683242@qq.com。

通信作者简介：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。

摘要：为了研究工业中常用的聚氯乙烯(PVC)粉体在气力输送过程中的静电影响因素，以PVC粉体为输送对象，以荷质比为指标，研究PVC粉体的下料质量流量、气流速度、气单位体积的气体中所含粉体的质量和球阀开度对粉体带电的影响。结果表明：当下料质量流量一定时，PVC粉体的荷质比会随气流速度增大而增大，随球阀开度减小而减小；当气流速度一定时，PVC粉体的荷质比会随下料质量流量增大而减小，输送颗粒的荷质比存在临界值为0.2μC/kg;当单位体积的气体中所含粉体的质量一定时，下料质量流量对PVC粉体荷质比影响要大于气流速度对其的影响；当下料质量流量一定时，PVC粉体的荷质比会随球阀开度的减小而减小。

关键词：聚氯乙烯; 气力输送; 静电; 荷质比

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

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