In order to deal with the problem of air pollutant emission

coal-fired power plants are pushing on ultra-low emission reform. The key points of ultra-low emission reform in coal-fired power plants are discussed

including boundary condition

operation status

denitration transformation scheme

dust removal transformation scheme

desulphurization transformation scheme and fans transformation scheme. Main technical routes for ultra-low emission transformation for coal-fired power plants are introduced. Moreover

the application of main technical routes in current power plants are analyzed. The investment cost

operation cost

economic benefit and environmental benefit of ultra-low emission are analyzed. The results show that

there is no obvious rule between ultra-low emission reform technical routes and investment cost. Before formulating technical routes

technology and economy of the projects should be compared according to the actual situation of units. Better quality of coal and larger unit capacity will lower the unit investment cost of ultra-low emission reform and improve the economic and environmental benefits.