转炉粉尘静电除尘器数值模拟

基于计算流体力学，采用ANSYS软件的FLUENT模块，应用DPM离散相模型模拟了烟气和粉尘特性对静电除尘器除尘效率的影响规律，设计正交模拟优化模拟条件，并与生产现场情况对比. 结果表明，静电除尘器除尘效率随烟气流速增加而降低，随烟气湿度和粉尘真密度增加而增加，随烟气含尘浓度和粉尘粒径增加先增加后降低. 根据此规律，通过设计L16(45)正交模拟，得出烟气和粉尘特性对静电除尘器除尘效率的影响程度为粉尘粒径?烟气流速?粉尘真密度?烟气含尘浓度?烟气湿度；放电电极电压35 kV条件下，使静电除尘器处于最优状态的条件为烟气流速0.5 m/s、粉尘粒径40 ?m、烟气含尘浓度40 g/m3、烟气湿度25%、粉尘真密度4000 kg/m3，此工况下除尘率达99.9%.

Numerical Simulation on Electrostatic Precipitator of Dust from Steel Converter

Based on computational fluid dynamics and FLUENT module of ANSYS software platform, the effects of flue gas and dust characteristics on the dust removal efficiency of converter electrostatic precipitator was simulated in this paper. From the results, the faster flow rate, the lower dust removal efficiency will be, and the higher humidity and concentration, the higher dust removal efficiency will be. With the increasing of solid particles density and size, the dust removal efficiency will decrease. According to above law, the L16(45) orthogonal simulation were designed and the results indicated that the influence degree of the electrostatic precipitator dust removal efficiency from high to low is particle diameter, velocity, dust true density, dust concentration and gas humidity. Under the conditions of discharge voltage 35 kV, the best dust removal effect conditions were that velocity of flue gas was 0.5 m/s, dust particle diameter was 40 ?m, flue gas dust concentration was 40 g/m3, flue gas humidity was 25%, true density of dust was 4000 kg/m3. In this case, the dust removal efficiency will reach 99.9%.