关键词: 静电除尘器, 数值模拟, 极板配置, 颗粒迁移, 收尘效率, k-湍流模型

Abstract: Electrostatic precipitators（ESP） are widely used in power plants，waste incineration，glass production and many other industries.Studying the configuration of discharge electrode and dust collecting plate（hereinafter referred to as electrode-plate） systematically is important for ESP in improving its efficiency.The discharge characteristics，flow field characteristics，particle trajectories and dust collection efficiency of the electrode-plate with six different configurations are studied by simulation.It is found out that the current density distribution near the plate surface is significantly affected by the shapes of electrodes，and the electrode-plate configured needle electrode is of the greatest current density.Due to the concave and convex structure of the dust collecting plate，the peak current density is always generated at the corner of the plate.And the sharp electrode tip will create an electric field intensity with high peak values on the surface of the electrode wire.Because of the prominent influence of electrodes' shape on the air flow distribution，needle shaped discharge electrode can speed up the maximum velocity of ionic wind.Particle trajectories and relative dust collection efficiency of six different electrode-plate configurations are calculated，and the one configured needle electrode and 480C pressed plate is of the highest dust collection efficiency.

Key words:

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