线-板式电除尘器场强正态分布模式假设及其检验

Assumption and Verification of Normal Distribution Model of Electric Field in Wire-plate ESP

根据线-板式电除尘器的电场分布特征,提出线-板式电极间电场分布服从正态分布假设。在此假设下,以电晕区边缘和收尘极板表面作为边界条件,应用高斯定理导出线-板式电除尘器的电场分布理论计算式。该式与Oglesby等报道的线-板式电场的数值解有极好的一致性。研究表明,无论是单根还是多根电晕线,在电晕区外,所得场强分布式在整个线-板式电除尘器内处处连续可导。

The assumption of the normal distribution of the electric field is proposed according to the characteristics of the electric field distribution in the wire-plate electrostatic precipitator （ESP）. The theoretical calculation formula for predicting the electric field distribution in the wire-plate ESP is developed by Gaussian electric flux theorem under the assumption when the outer edge of the corona and the surface of the collection electrode are taken as the boundary conditions. The values predicted by the new formula are in sound agreement with the numerical values presented by Oglesby and others. The new formula has also shown that the electric field distribution is continuous and derivable everywhere in the wire-plate ESP except in the corona region.