Nitrogen recycling system

The utility model is applicable to the technical field of gas recycling, and provides a nitrogen recycling system. The nitrogen recycling system comprises a gas classified transportation module, a gasmixed collection module, a compression pressurization module, a condensation separation module and a pressure reduction recycling module. According to the nitrogen recycling system provided by the utility model, waste nitrogen with different pressures is subjected to gas classification and transportation by arranging the gas classification and transportation module, and waste nitrogen with different pressures is subjected to gas mixing and collection by arranging the gas mixing and collecting module; the mixed waste gas is subjected to compression pressurization and condensation separation byarranging the compression pressurization module and the condensation separation module, finally, high-pressure gas and low-pressure gas are obtained through pressure reduction separation by arrangingthe pressure reduction rec