In order to improve the separation performance of a cyclone demister for small droplets and effectively prevent the electrostatic demister from corona occlusion, the cyclone demister is combined with an electrostatic demister to form an electrostatic-cyclone demister. After the verification of numerical simulation with experimental data of the pressure drop of the cyclone, the effect of inlet velocity and the ratio of cylinder length to diameter on the separation performance of droplets with various sizes were investigated by numerical simulation. Results show that the separation efficiency of the electrostatic cyclone demister is markedly improved compared with the cyclone demister, especially for the droplets smaller than 4 μm. The separation efficiency of the cyclone demister increases with increase in the inlet velocity, but the effect of the inlet velocity on the separation efficiency is reduced by the coupling of the electrostatic and cyclonic fields. With increase in the ratio of cylinder length to diameter, the contribution of the electric field to the separation is getting more and more important compared with that of the swirl field. This indicates that the electric field would well compensate for the insufficient separation efficiency of small droplets through the centrifugal settling.

为了改善旋风除雾器对小液滴的分离性能并有效地防止静电除雾器被电晕阻塞，将旋风除雾器与静电除雾器组合以形成静电旋风除雾器。在通过旋风分离器的压降实验数据验证了数值模拟之后，通过数值模拟研究了入口速度和筒长与直径之比对各种尺寸的液滴分离性能的影响。结果表明，与旋风除雾器相比，静电旋风除雾器的分离效率得到了显着提高，尤其是对于小于4μm的液滴。旋风除雾器的分离效率随着入口速度的增加而增加，但是入口速度对分离效率的影响通过静电场和旋风场的耦合而减小。随着汽缸长度与直径之比的增加，与旋流场相比，电场对分离的贡献变得越来越重要。这表明电场将很好地补偿通过离心沉降产生的小液滴的不足分离效率。