Oxygen-enriched recycling system

The utility model belongs to the technical field of hydrogen peroxide production equipment. The utility model provides an oxygen-enriched recycling system. The system comprises a cryogenic nitrogen making device, a tail gas exhaust port of the cryogenic nitrogen making device is communicated with a first gas buffer tank; wherein a gas outlet of the first gas buffer tank is communicated with an aircompressor, a gas outlet of the air compressor is communicated with a second gas buffer tank, a gas outlet of the second gas buffer tank is communicated with an air filter, and a gas outlet of the air filter is communicated with a gas inlet of an oxidation tower of the hydrogen peroxide preparation system. According to the hydrogen peroxide preparation device, oxygen-enriched air in the air separation device can be conveniently conveyed to an oxidation process in a hydrogen peroxide preparation section for use, so that resource waste is avoided, the oxidation effect of hydrogenated liquid isimproved, the load of an a