Lime kiln flue gas denitration system

The utility model discloses a lime kiln flue gas denitration system, which relates to the technical field of flue gas denitration, and comprises a denitration reactor, an ammonia water supply assembly, an ash removal assembly and a dust removal assembly, the denitration reactor is provided with a top air inlet, a bottom air outlet and a side ash blowing port, and the air inlet is used for being communicated with a lime kiln and can be used for introducing flue gas; the ammonia water supply assembly is communicated with the gas inlet and is used for introducing ammonia water into the denitration reactor; the ash removal assembly is communicated with the ash blowing port and is used for removing smoke dust of a catalyst layer in the denitration reactor; the dust removal assembly communicates with the gas outlet and is used for removing dust from flue gas discharged from the gas outlet. According to the flue gas denitration system for the lime kiln, a flue gas heating device and an ammonia water evaporator do no