排针-辊式电晕放电特性

发布时间：2018-05-15 20:32

本文选题：静电分选 + 排针电流　；参考：《高电压技术》2017年06期

【摘要】：为提高高压静电分选效率,寻求产生最佳电场的新型排针电极结构,采用自制新型排针辊式高压放电装置,探究了放电针直径对电晕放电性能的影响;设计了一种新的测量装置,实现了对单根及多根放电针上放电电流的测量,为了在相同电压下得到更好的放电效果,对35根放电针中的偶数序号放电针缩进5次、每次5 mm,进行比较研究;在MATLAB平台上,利用电磁场理论,对不同缩进条件下排针型电极的空间电场分布仿真模拟。结果表明:其他条件一定,放电针的直径越小,排针总的放电电流(排针电流)及每根针放电电流(针电流)越大;随着偶数序号放电针缩进长度的增加,排针电流呈先增大后减小的趋势,在缩进长度为15 mm时,排针电流达到最大值,空间电场强度最强,此时为最佳电场的新型长短针的排针结构。电场模拟结果与实验相一致,印证了排针中缩进的偶数序号放电针对突出的奇数序号放电针的放电有加强作用。
[Abstract]:In order to improve the efficiency of high voltage electrostatic separation and to find out a new type of electrode structure for producing the best electric field, the influence of discharge needle diameter on the performance of corona discharge was investigated by using a new type of high voltage discharge device. A new measuring device is designed to measure the discharge current of single and multiple discharge needles. In order to obtain better discharge effect at the same voltage, the even-ordinal discharge needles in 35 discharge needles are retracted 5 times. On the MATLAB platform, using electromagnetic field theory, the spatial electric field distribution of a row needle electrode under different indentation conditions is simulated. The results show that the smaller the diameter of the discharge needle, the greater the discharge current (discharge current) and the discharge current (needle current) of each needle, and with the increase of the length of the even number discharge needle, the smaller the diameter of the discharge needle is, the greater the discharge current (discharge current) and the discharge current (needle current) of each needle are. The needle discharge current increases first and then decreases. When the length of retraction is 15 mm, the current reaches the maximum value and the intensity of the space electric field is the strongest. At this time, it is a new type of long and long pin structure with the best electric field. The electric field simulation results are in agreement with the experimental results, and it is confirmed that the even-ordinal number discharge in the reentrant needle can strengthen the discharge of the outburst odd-numbered discharge needle.
【作者单位】：河北大学物理科学与技术学院静电研究所;
【基金】：国家自然科学基金(11205046;51077035) 河北省自然科学基金(A2013201266)~~
【分类号】：O461.2

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