In view of the controversial issues in the technical route of the ultra-low emission transformation of coal-fired units

this paper summarizes the development of flue gas pollutant synergistic removal technology

combing with the feasibility study of the ultra-low emission transformation and the implementation of the integrated renovation project. The ultra-low emission synergistic removal strategy and the integration of the core technology were presented in detail. It points out that the ultra-low emission transformation can combine the "synergistic" and "wet removal" routes

and the overall optimization design can be carried out in the premise of certain boundary conditions and site layout full. The engineering application shows that

after the coal-fired unit adopted the integrated synergistic removal technology

the concentration of NOx

SO2 and soot were all below the ultra-low emission limit. At the same time

the removal effect of pollutants such as SO3

Hg and PM2.5 was also remarkable