Abstract: The present situation of flue gas denitration market of our country was analyzed. The key technologies of SCR denitration process were expounded, which include the selection of ammonia injection device, the simulation experiment of flow field, the design of SCR reactor, the design of denitration gas duct and ash hopper, the selection of catalyst type, the denitration system debug, the operation, maintenance and management of the denitration system. Aiming at the domestic denitration project construction, several suggestions were put forward.

Key words: selected catalytic reduction (SCR) method, flue gas deNOx, key technology