Abstract:The collection efficiency of submicron dust (0.01~1μm) by using ESP is low at present. The effect of submicron dust charging and coagulation in alternating electric field on collection efficiency was investigated. The ion density increased with the increasing of particle momentum and electric field strength. The most high value was 1.97×109/cm3. When the alternating electric field strength of 1.75 kV/cm, the frequency of 100Hz, for median-particle-size of 0.2μm silicon powder, the mass percent of particles of <0.2μm decreased from 71% to 53%, while the mass changing rate of the particles of 5~10μm increased by 1.62 times. The removal efficiency of silicon powder median-particle-size of 0.2μm increased by 27.6%. The collection efficiency increased by one time. Dust density was in a limited impact on the collection efficiency. The charging and coagulation in alternating electric field would be an effective method to collection submicron dust in high velocity flow field.
白敏菂, 王少雷, 陈志刚, 毛首蕾. 烟道荷电凝并电场对电捕集微细粉尘效率的影响[J]. 中国环境科学, 2010, 30(6): 738-741.
BAI Min-Di, WANG Shao-Lei, CHEN Zhi-Gang, MAO Shou-Lei. Effect of submicron dust charging and coagulation in the flue on the efficiency of ESP. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(6): 738-741.