Abstract:In the flue gas pollutants emission reduction technology,the flue gas dust removal technology is developed from electrostatic precipitation and bag dust collection,to the electrostatics fabric filter,wet dust removal,low-low temperature electrostatic precipitator and agglomeration technology.Flue gas desulfurization methods include dry,semi-dry,wet and other technologies,but the most widely used is still limestone-gypsum wet method.Flue gas denitrification technology mainly includes selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR),etc. SCR flue gas denitrification technologies more widely used in the power plant,the key technologies lie in the developing low load,full load denitration catalyst and catalyst regeneration.Activated carbon injection is a more technology mature of flue gas mercury removal,but its cost is high,and it also affects the comprehensive utilization of fly ash.In recent years,catalysis and other flue gas mercury removal technology has been developed,with a series of results obtained.The combined removal of multiple pollutants can reduce the operating cost of single pollutant removal and it becomes a trend of development.