【摘要】 为了提高旋风分离器对细颗粒物的分离效率，采用双极荷电技术对旋风分离器进行强化，通过实验研究了荷电电压、入口流速对旋风分离器分离性能的影响。结果表明，双极荷电技术可显著改善旋风分离器对细颗粒物的分离能力；荷电电压超过起晕电压后，随着电压的增加，分离效率明显提高；增大入口流速可提高分离效率，但会减弱双极荷电的强化效果。为解释实验现象，引入旋流、库仑力作用下的颗粒凝并，建立了双极荷电-旋风分离器分级效率模型。模型计算值与实验值的平均绝对偏差为0.071，模型反映了“鱼钩效应”，颗粒凝并效果越强，“鱼钩”现象越明显。更多还原

【Abstract】 In order to improve separation efficiency of cyclone separators for fine particles, the cyclone separator was enhanced by bipolar charging technology. Effects of charging voltage and inlet flow rate on the separation performance of the cyclone separator were studied experimentally. The results show that the bipolar charging technology can significantly improve separation ability of the cyclone separator for fine particles, and a “fish-hook” shape of fractional efficiency curve is observed. The separation efficiency increased significantly with the increase of charging voltage. While increasing flow rate improved the separation efficiency, the strengthening effect of bipolar charging on the cyclone separator was weakened correspondingly. In order to explain the experimental phenomenon, particle agglomeration under swirl flow and coulomb force was introduced to the fractional efficiency model of a cyclone separator with bipolar charging. The average absolute deviation between the fractional efficiency calculated by the model and the experimental value was 0.071. The model can reflect the "fish-hook effect", and stronger particle agglomeration effects leads to more pronounced “fish-hook” phenomenon.更多还原