Compressed nitrogen and foam fire-extinguishing system

The invention discloses a compressed nitrogen and foam fire-extinguishing system. The compressed nitrogen and foam fire-extinguishing system comprises a fire-extinguishing foam tanker and a nitrogen tanker, wherein the fire-extinguishing foam tanker is basically equal to a fire-extinguishing foam tanker in the prior art, the nitrogen tanker is provided with a compressed nitrogen system, the nitrogen system comprises a nitrogen generating device and a nitrogen delivery pipeline, and the nitrogen outlet end of the nitrogen generating device is connected with a water-foam mixing pipeline on the fire-extinguishing foam tanker to form a compressed nitrogen and foam liquid pipeline. The compressed nitrogen and foam fire-extinguishing system has the technical advantages that oxygen supported combustion in the air is completely eradicated, a foam insulation effect is improved, and the fire disaster suppressing capability is strengthened. The nitrogen generating device serves as an independent unit to constantly suppl