Study on SO_3 Cooperative Removal Effect of Ultra-low Emission Technology in Coal-fired Power Plants

摘要

SO_3 is one of the main precursors of atmospheric PM_(2.5), and its emission has attracted more and more attention in the industry. This paper briefly analyzes the harm of SO_3 and the method of controlled condensation to test SO_3. The effect of cooperative removal of SO_3 by ultra-low emission technology in some coal-fired power plants has been tested by using the method of controlled condensation. The results show that the cooperative removal of SO_3 by ultra-low emission technology in coal-fired power plants is effective. The removal rate of SO_3 by low-low temperature electrostatic precipitators and electrostatic-fabric integrated precipitators can be exceeded 80%, while the removal rate of SO_3 by wet flue gas desulfurization equipment displays lower than the above two facilities, and the wet electrostatic precipitator shows a better removal effect on SO_3. With the use of ultra-low emission technology in coal-fired power plants, the SO_3 emission concentration of the tail chimney reaches less than 1 mg / Nm~3.