Study On Numerical Simulation Of Electric Field Intensity Of The Single-Zone ESP With Double-Vortexes-Plates

China’s energy structure is dominated by coal, harmful dust and acid rain caused by coal burning. Dust particle is carrier of pollutant,heavy metals, poly cyclic aromatic hydrocarbons and other toxic substances. It is suspended in the air, and bring bad impact to human health, the environment and society. Which cause the dust becoming one of the largest threat to environmental safety of the atmosphere. Because its big flue gas treatment capacity, high dust collection efficiency, material resistance, and no secondary pollution, and other advantages, the electrostatic precipitator (ESP) has been used for the majority of civilian facilities and various industrial sectors. However, the traditional electrostatic precipitator technology has been enabled to meet the increasing atmospheric environmental protection requirements, especially for fine dust trap, the collection efficiency of ultra-fine particles of less than 2.5μm size (PM2.5) is usually less than 90%. Therefore, we must study more advanced electrostatic precipitator technology to meet the social and market needs.Study on the ESP with double-vortexes-plates, the characteristics of new type ESP are:firstly, to improve ion momentum through the air flow, reducing ion consolidation rates, thereby increasing ion concentration and the particle load electricity; Secondly, air vortices are formed because of the double-vortexes dust collector plate structure and extend the residence time of dust, in order to increase the probability of collision with ions and condensate and efficiency of ultra-fine dust.lastly, to improve the capture of fine dust collection efficiency.In this paper, on the theoretical basis of the traditional ESP, the mechanism of the single-zone ESP with double-vortexes-plates was explained.By analyzing, ion concentration was given as the evidence of judging performance of single-zone ESP with double-vortexes-plates.Through the establishment of single-zone ESP with double-vortexes-plates geometry model, combined with the electric field strength of the finite element current continuity equation, Poisson equation, Laplace equation were analyzed.The ANSYS WORKBENCH simulation software was used for internal electric field and potential distribution of ESP. By changing the four parameters:voltage U, electrode diameter D, row distance L and the plate height H to simulate the result of the electric field and potential. Simulation results showed that with increases of voltage U, the electric field strength increased. The electric field intensity distribution is better when electrode diameter D= 1mm, row distance L= 120mm, plate height H = 10mm.The simulation results were verified by ion concentration experiments. Under the circumstance of constant wind speed of 2.03m/s,the influence of different voltages U, electrode diameter D, row distance L, the plate height H on ion concentration was researched, and determined when U=-18kV, D= lmm, L= 120mm, H= 10mm,the electric field performance of the electrode configuration parameters was better, and the ion concentrations up to 6.11 × 109cm-3. And voltage is determined to be one of the main factors affecting electric field strength by orthogonal experiment.