利用数值模拟方法分析静电-旋流耦合除雾器的分离性能

化工、冶金、电镀、纺织、机械制造和建材等行业均存在不同程度水雾、酸雾或油雾等污染.因此,除雾是一个必不可少的过程.为克服旋流除雾器对5 μm粒径以下颗粒去除效率低的问题,提升分离效率,将离心分离和静电分离有机结合,耦合静电除雾器与旋流除雾器形成直径为100mm的静电-旋流除雾器.利用Fluent流体仿真软件对静电-旋流...

Analyze the separation performance of electrostatic-cyclonic coupling demister by numerical simulation method

There are varying degrees of water, acid or oil mist pollution in the chemical, metallurgy, electroplating, textile, machinery manufacturing and building materials industries, thus demisting is an essential process. To overcome the low efficiency of cyclone demisters in remove particles smaller than 5 μm in diameter, this work establishes an electrostatic-cyclone demister with a diameter of 100 mm by combining an electrostatic demister with a cyclone demister. The effects of inlet velocity, voltage and droplet size on the mist removal performance are studied based on numerical simulations performed on the Fluent software platform and verified by a pressure drop test. Results show that the optimal inlet speed of the electrostatic-cyclone demister is 8~12 m·s−1, the optimal operating voltage is 60 kV, and the defogging efficiency is significantly higher than that of the ordinary cyclone demister, especially for mists smaller than 3 μm in diameter.