Development of Wet Type Electrostatic Precipitator Using a Mist Formation

近年来，煤炭作为发电站的能源，使用量不断增加。如何在严格的环境法规下减少大气中的粉煤灰是燃煤面临的问题之一。本研究开发了一种新的湿式静电沉淀法，用于收集亚微米半径的小颗粒。效率高。该方法的原理是：粒子周围形成的非均匀雾霭会由于半径的增大而导致电磁力的增大。根据实验和理论研究，得到了以下结果：1。阐明了平行板间强迫对流和电晕电场作用下灰颗粒成雾机理及其输运过程。2 .聚粒效率与设备配置、以流速为依据的雷诺数、以电压为依据的EHD雷诺数、以温度和湿度为依据的无量纲参数<T^*>有关。根据设备的配置，得出了最佳的操作条件。

In recent years, the use of coal has been increasing as an energy source for power station. One of the problems burnimg coal is how to decrease the flyash in the atmosphere under the strict environmental regulation. In this research, a newly method of wet type electrostatic precipitation was developed so as to collect the small particles, which have sub-micron radius. with high efficiency. This method is based on the principle that heterogeneous mist formation around the particles results in enlargement of electric force due to increase of radius. According to the experimental and theoretical studies, the following results were obtained:1. The mechanism of mist formation of ash particles and their transport process were clarified under the forced convective and corona-electric fields between parallel plates.2. The efficiency of collenting particles was related with the configuration of equipments, Reynolds number based on the flow velocity, EHD Reynolds number based on the voltage, and dimensionless parameter <T^*> determined by temperature and humidity.3. The optimum operating conditions were obtained in relation with configuration of equipments.