脉冲放电除尘中颗粒的荷电研究

脉冲电除尘电晕放电状态不同于传统的直流电除尘。脉冲电晕放电在脉冲期间产生大量的高能电子，使颗粒在电场中进行电子荷电。窄脉冲放电电晕区可覆盖整个电极间区域，荷电区域内既有电子，也有正离子和负离子，电子能量远高于离子能量，正负离子数量不平衡。粒子荷电过程分2个阶段，在脉冲放电期内为电子荷电，脉冲期过后为离子荷电。

RESEARCH OF PARTICLE CHARGE IN PULSE CORONA DISCHARGE DEDUSTING

The discharge state of pulse corona in dedusting differs from of that DC corona.The high energy electrons produced during the submicro second pulse discharge process are main source of the particle charge.The area of narrow pulse corona discharge can cover the whole area between the poles.In the pulse corona area,there are both electrons and positive and negative ions,with the electron energy much higher than that of ion and unbalance between the amounts of positive ions and negative ones.The process of particle charging consists of two periods,the electron charging in pulse discharge duration and the ion charging after the pulse discharge duration.