粉尘的电晕荷电物理模型  

Physical model of corona charged dust

作　　者：孙健[1] 白敏冬[1] 毛程奇[1] 储金宇[2] 吴春笃[2] 依成武[2] 

机构地区：[1]大连海事大学物理系,辽宁大连116026 [2]江苏大学生物与环境工程学院,江苏镇江212013

出　　处：《大连海事大学学报》2006年第3期108-111,共4页Journal of Dalian Maritime University

基　　金：国家自然科学基金重点资助项目(60031001);国家自然科学基金资助项目(60471036;50578020)

摘　　要：针对目前电除尘技术理论尚不完备，以及电除尘器收尘效率不高且稳定性差的问题，建立了粉尘的电晕荷电物理模型，并深入研究了大气压电场电离放电特征参量的时空演变规律、电离放电通道中的带电粒子复合及其输运特性．实验结果证明：除尘电场的电离占空比可从1．8×10^-5提高至2×10^-2，带电粒子输运项也可得到2～3个数量级的提高．结果强化了烟尘的荷电、凝聚物理过程，也将大幅度提高烟尘的趋进速度和除尘效率．In order to solve the problems such as incomplete electrostatic precipitation technology, and low efficiency of electrostatic precipitation with poor stability, the physical process of corona discharge in the electric precipitation field and the mechanism of dust charged agglomerating are summarized. The time and space evolution rule of characteristic parameter of ionization discharge at atmospheric pressure and the compound and transportation characteristic of charged particle in the channel of ionization discharge has been studied based on physical model. The results indicate that, fractional active volume in electric filed is raised to 2 × 10^-2 from 1.8 × 10^-5 and transportation rate of charged particles is increased by 2-3 orders of magnitude as well. Therefore the physical process of charging and agglomerating of dust particles has been strengthened to improve the hasten speed and removal efficiency evidently.

关 键 词：电除尘技术 电离放电 电凝聚 物理模型 

分 类 号：X511[环境科学与工程—环境工程]