摘要
研究了经过粉碎、筛分后的麦麸粉体的电学特性。小麦麸皮经振动研磨20 min后,颗粒最为分散,将此时获得的麦麸颗粒进行高频振动筛分,获取3种不同粒径、结构和组成的麦麸粉体。通过电晕给电和摩擦起电两种方式使得麦麸颗粒带电,结果表明:在两种给电方式下,粒径在45～75μm的麦麸颗粒带电效果均最好。在电晕给电方式中,当电压达到46 kV时,3种麦麸颗粒所带电荷出现明显差异。对于摩擦起电,聚四氟乙烯对于3种麦麸颗粒的摩擦起电效果均最好,可以作为摩擦起电的管道材料。经过初步的探索研究,基于不同的荷质比,麦麸粉体可以通过高压静电场分离得以分离。
In the experiments, the electrical properties of wheat bran powder after crushing and sieving were studied. After the vibration grinding for 20 min, wheat bran particle size was the most decentralized, and then, the high - frequency vibration sieving was carried out on wheat bran particles to obtain three different powders, which have dif- ferent particle sizes, structures and composition. Through the corona charging and friction charging, the wheat bran powders obtained charges. The results showed：for two types of charging, the bran particle size, which was between 45 p,m and 75 i^m, obtained the most charges. In the corona charging experiments, when the voltage reaches 46 kV, three kinds of wheat bran particles got obviously different charges. For friction charging experiments of wheat bran, Polytet- rafluoroethylene （PTFE） gained the best friction charing effect of three different powders and could be used as the pipe material of friction charging. After the preliminary exploration and study, we get that wheat bran powder can be separated by high voltage electrostatic field due to their different charge -to -mass ratios.
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2013年第2期1-5,共5页
Journal of the Chinese Cereals and Oils Association
基金
国家自然科学基金(31171785)
江苏省农业科技支撑计划(BE2010387)
江南大学基本交叉学科项目(JUSRP31102)
关键词
麦麸
电晕给电
摩擦起电
电学特性静电场分离
wheat bran, corona charging, friction charging, electrical properties, electrostatic separation
