Is there a recycled used oxygen concentrator in Nanjing

No. Nanjing is no recycling used oxygen concentrator, oxygen concentrator is a class of machines to produce oxygen, its principle is to use air separation technology. First of all, the air will be compressed at high density and then use the different condensation points of the components of the air to make it at a certain temperature for gas-liquid separation, and then distillation will be separated into oxygen and nitrogen.