The domestic key technical routes to realize ultra-low emissions of flue gas pollutants in coal-fired power plant are summarized.Combining with the ultra-low emission demonstration project of a domestic600 MW unit

this paper focuses on the key factors influencing the ultra-low emissions

it puts forward the control technology scheme for NO_x

SO_2 and dust

and emphasizes that

during the ultra-low emission system optimization

the ultra low emission transformation scheme should be reasonably selected according to the objective condition and environmental protection and evaluation results of the existing equipments in the power plant

and the overall system design and collaborative removal of various emissions should be carried out to reduce the costs of investment

operation and maintenance.