摘要：为了准确测定粉尘比电阻,为静电除尘设计、静电防护设计和判定粉尘静电点燃提供重要参数,根据粉尘比电阻的测定普遍采用的3个标准IEC 1241-2-2、BS 5958-1和ASME PTC28 4.05,开发3种不同的比电阻测定装置,并对典型粉尘的比电阻进行测试。结果表明,粉尘比电阻的测试结果与测试方法有关,不同方法的测定结果有较大偏差;粉尘样品的密实度和其上的加载电压是影响测定结果的重要因素,密实度越大,电压值越大,测得的比电阻值越小;对于不同的工程应用目的,应采用不同的测试方法,IEC标准和BS标准通常用于静电防护设计,而ASME标准通常用于静电除尘设计。

关键词：粉尘比电阻：静电防护；静电除尘

Abstract：In order to choose a proper method to measure dust resistivity accurately to provide important parameters for design of electrostatic precipitation,electrostatic prevention and dust ignition prevention,three different test devices were developed according to corresponding three standards widely using for determination of dust resistivity,i.e.IEC 1241-2-2,BS 5958-1 and ASME PTC28 4.05.Resistivity of several typical dusts was tested.The results show that the testing results of dust resistivity have relationship with testing methods.Testing results of different methods have larger deviation.The compaction of dust sample and the test voltage applied on it are important affecting factor on test results.The larger the compaction is,the larger the voltage is,and the smaller the tested resistivity is.It is necessary to choose a proper test method according to different application of dust resistivity.In general,IEC and BS standards are applied to the design of electrostatic prevention and ASME standard is applied to the design of electrostatic precipitation.

Keywords：dust resistivity；electrostatic prevention；electrostatic precipitation