Abstract: The electrostatic demister has powerful function of trapping the fogdrop and the small dust particles and had been used in petrochemical and metallurgical industrials for more than 30 years. The working principle of the electrostatic demister was introduced; the development situation of the electrostatic demister in our country was expounded. Aiming at the operating environment of power plant, the key technology for developing higheffective electrostatic demister with high gas velocity was put forward. It was pointed out finally that the application and dissemination of the electrostatic demister in coalfired power plant will be helpful for energy conservation and emission reduction. 

Key words: electrostatic demister, coal-fired power plant, high gas velocity, environment protection