新型错位板对静电除尘器流场影响的数值模拟

为降低现有除尘器的改造成本，提高微细粉尘的收集效率，在现有除尘器的基础上，对阳极板排布方式进行调整，设计错位排布方式，最大化地利用原有除尘器的资源，以最小的改造成本，达到较满意的除尘效果。利用目前应用广泛的FLUENT仿真软件进行数值模拟，观察分析了其电势分布和气流分布。数值模拟结果表明：当主流风速小于0.5 m·s⁻¹时，离子风对流场的影响较大；当主流风速达到0.8 m·s⁻¹以上，主流风成为影响空间流场分布的主要因素，离子风的影响被削弱，但此时的离子风团仍会促进气流流入错位极板背部达到收集目的。错位板间隙设计可以削弱离子风对阳极板的冲刷作用，证明了错位板排布有利于改善离子风对粉尘收集的负面影响，有效提高对微细粉尘的收集效率。数值模拟的结果对静电除尘器的设计与改进有一定的参考意义。

Numerical simulation of the influence of a new type of dislocation plate on the flow field of the electrostatic precipitator

In order to reduce the upgrading cost of the existing precipitator and improve its collection efficiency of fine dust, on the basis of the existing precipitator, the arrangement of the anode plates was adjusted. The dislocation arrangement was designed to maximize the use of the original precipitator resources, minimize upgrading cost, and achieve a satisfactory dust removal effect. The widely used FLUENT simulation software at present was used to perform numerical simulation, and the electric potential distribution and airflow distribution were observed and analyzed. Numerical simulation results showed that when the mainstream wind speed was lower than 0.5 m·s−1, the ion wind had a greater impact on the flow field; when the mainstream wind speed was over 0.8 m·s−1, the mainstream wind became the main factor affecting the spatial flow field distribution. The impact of ion wind was weakened, but the ion wind group at this time still promoted the airflow to flow into the back of the misplaced plate and completed the collection. The gap design of the dislocation plate could weaken the scouring effect of the ion wind on the anode plate, which proved that the arrangement of the dislocation plate was beneficial to conteract the negative influence of the ion wind on the dust collection and effectively improved the collection efficiency of fine dust. The result of numerical simulation has a certain reference significance for the design and improvement of electrostatic precipitator.