Flue gas low-temperature efficient denitration system

The utility model discloses a low-temperature high-efficiency flue gas denitration system, relates to the field of waste gas treatment, and aims to solve the problems that after regenerated liquid is sprayed by using a spraying device, packing is easy to agglomerate, the overall dispersity becomes poor, a packing grid frame is easy to deposit and block, the reaction area is reduced, and the interception and denitration effects are reduced. According to the technical scheme, a pretreatment filler grid frame and a denitration catalyst filler grid frame are in a disc shape, rotating shafts are fixedly arranged at the centers of the pretreatment filler grid frame and the denitration catalyst filler grid frame, filler dispersing combs are connected to the outer edges of the rotating shafts, and comb teeth of the filler dispersing combs are in contact with the pretreatment filler grid frame and the denitration catalyst filler grid frame; under the continuous carding and dispersing action of the filler dispersing co