The two-stage electrostatic precipitator is widely used to purify oil mist particles. However, there is limited research on the influences of relative humidity, particle deposition characteristics, and the generation of gaseous pollutants. Therefore, this paper established a numerical model of the electrostatic oil mist purifier and applied it to a two-stage electrostatic precipitator. Then the model was used to investigate the corona discharge characteristics under different relative humidity conditions in the charged zone, the particle deposition characteristics, the purification efficiency, the ozone concentration distribution, and the oil vapor concentration distribution in the collection zone. The results indicate that, with a constant temperature, the corona current decreases as relative humidity increase, and there is a quadratic relationship between relative humidity and current. The variation in relative humidity has little impact on the purification efficiency. The maximum ozone concentration occurs near the electrode line, and its concentration is influenced by the discharge current and inlet airflow velocity. The oil vapor concentration reaches its maximum value at the side plates, with a value of 19 ppb, while it reaches the minimum value at the collecting zone electrode plate, with a value of 2 ppb. The temperature is the main factor affecting the volatilization of the oil film, with higher temperatures resulting in higher oil vapor.

两级静电除尘器广泛用于净化油雾颗粒。然而，对于相对湿度、颗粒沉积特性和气态污染物产生的影响的研究有限。因此，本文建立了静电油雾净化器的数值模型，并将其应用于两级静电除尘器。然后利用该模型研究了带电区不同相对湿度条件下的电晕放电特性、收集区颗粒沉积特性、净化效率、臭氧浓度分布、油蒸气浓度分布。结果表明，在温度恒定的情况下，电晕电流随着相对湿度的增加而减小，且相对湿度与电流之间存在二次关系。相对湿度的变化对净化效率影响不大。臭氧浓度最大出现在电极线附近，其浓度受放电电流和入口气流速度的影响。油蒸气浓度在侧板处达到最大值，值为19 ppb，而在收集区电极板处达到最小值，值为2 ppb。温度是影响油膜挥发的主要因素，温度越高，油蒸气越高。