Flue gas denitration system for walking beam furnace and technological process of flue gas denitration system

The invention discloses a flue gas denitration system for a walking beam furnace, which comprises a storage preparation module, a conveying module, a mixing and metering module, a distribution module and a spraying module, wherein the storage preparation module comprises a denitration agent storage tank and a diluent storage tank, the conveying module comprises a denitration agent conveying assembly and a diluent conveying assembly, the denitration agent storage tank is connected with the denitration agent conveying assembly, the diluent storage tank is connected with the diluent conveying assembly, the denitration agent conveying assembly and the diluent conveying assembly are respectively connected with the mixing and metering module, the mixing and metering module is connected with the distribution module, the distribution module is connected with the spraying module, and the spraying module is inserted into the walking beam furnace for denitration. Compared with the prior art, flue gas heating and catalys