Abstract Electrostatic precipitator is the most efficient device used for the removal of fly ash particles from the flue gases produced by coal-fired boilers in power plants. However, the fractional collection efficiency of electrostatic precipitators steeply decreases for particles smaller than 1 μm, and particles in the size range of 200–500 nm are removed with lower collection efficiency than those outside this range. These particles are dangerous to humans and have detrimental environmental effects, so there is a need for novel more efficient technologies for their control. One of the answers to this challenge is the two-stage electrostatic precipitator, in which the electrostatic charging and precipitation processes have been separated. The PM2.5 particles (of a size

中文翻译：

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用于减少 PM2.5 颗粒排放的两级静电除尘器

摘要 电除尘器是电厂燃煤锅炉烟气中飞灰颗粒去除最有效的装置。然而，对于小于 1 μm 的颗粒，静电除尘器的分级收集效率急剧下降，并且在去除 200-500 nm 尺寸范围内的颗粒时，其收集效率低于该范围外的颗粒。这些颗粒对人类是危险的，对环境有不利影响，因此需要更有效的新技术来控制它们。这一挑战的答案之一是两级静电除尘器，其中静电充电和沉淀过程已分离。PM2.5 颗粒（大小为