Flue gas low-temperature denitration system

The utility model relates to the technical field of flue gas treatment, in particular to a flue gas low-temperature denitration system, which comprises a medicine box, a first valve, a second valve, a flue gas inlet pipe, a flue gas outlet pipe, a flue gas inlet pipe and a flue gas outlet pipe, the first end of the dosing pump is connected to the first valve, the second end of the dosing pump is connected with a liquid pumping pipe, a second valve is arranged on the liquid pumping pipe, and after the first valve and the second valve are opened, the dosing pump is used for pumping the denitration agent in the agent box into the liquid pumping pipe. The low-temperature denitration system disclosed by the utility model can be flexibly arranged at the position of the outlet of the induced draft fan, the spray head can be arranged on the flue of the induced draft fan of one or more boilers, any boiler in the starting and stopping process is subjected to denitration treatment, and the problems of low smoke temperat