模拟烟道中粉尘粒子的荷电凝并实验研究白敏菂.pdfVIP

27 6 河北大学学报( 自然科学版) Vol. 27 No. 6 2007 11 Journal of Hebei Uni ersity( Natural Science Edition) No . 2007 艹 白敏 , 邱秀梅, 杨 波, 毛程奇 的 ( , 116026) : 基于电凝并理论, 在模拟电除尘器烟道中增设预荷电装置, 进行了高压电场荷电凝并研究. 实 结果表明, 将预荷电装置安装于烟道中, 离子浓度比除尘电场中高约1 个数量级, 有利于提高粉尘的荷电量, 增强带电粒子的凝并作用; 交变电场比直流电场更利于带电粒子凝并, 最佳电场频率为40 Hz; 电凝并作用 可以使粒子粒径增大21% 左右, 总除尘效率提高2. 6%~ 3. 5% , 有利于实现电除尘器的小型化. : ; ; ; : X 5 : A : 1000- 1565( 2007) 06- 0610- 05 Study on Pre-charge and Agglomeration of the Dust Particles in Simulation Flue BAI Min-di, QIU Xiu- mei , YANG Bo, MAO Cheng-qi ( Institute of En ironmental Engineering , Dalian Maritime U ni ersity, Dalian 116026, China) Abstract:The experiment of pre-charge and electrostatic agglomeration in strong electric field is done by in- stalled the pre-charge facility in the flue of electrostatic precipitator, based on the theory of electrostatic agglom- eration. T he results show that ion concentration can be increased about 1 order of magnitude greater than that in the field of electrostatic precipitation after adding the pre-charge facility in the channel, which is propitious to in- crease the charge of particles and enhance the agglomeration of the charged particles; T he AC electric field is more effecti e than DC electric field, and the optimal frequency is 40 Hz; The particle diameter and the efficiency of electrostastic precipitator can been increased 21% , 2. 6%~ 3. 5% respecti ely by the electrostatic agglomera- tion, w hich is beneficial to realize the miniatyrization of electrostatic precipitator. Key words: electrostatic precipitator; pre-charge; electrostatic agglomeration; corona discharge , . ,