Device and method for conveying pulverized coal through nitrogen

The invention relates to the technical field of iron-making blast furnace coal injection, in particular to a device and method for conveying pulverized coal through nitrogen, the device comprises a pulverized coal tank car and a pulverized coal bunker, the lower end of the pulverized coal bunker is connected with a pulverized coal conveying pipeline, the other end of the pulverized coal conveying pipeline is connected with the pulverized coal tank car through a pipeline, and the pulverized coal conveying pipeline is connected with a nitrogen purging pipeline. A manual cut-off ball valve is arranged on the nitrogen purging pipeline, and the powder conveying pipeline is connected with the nitrogen purging pipeline through a U-shaped pipeline; the nitrogen purging replacement is used for powder conveying operation, and compared with an original mode that powder is directly loaded into a pulverized coal tank car through a dust discharging valve of a pulverized coal bin to convey powder, the environment protection