Nitrogen penetration can meet the requirements of general compressed air. The pressure of nitrogen turbine compressor is high, and the gear type is more energy-saving. According to the discharge pressure, there are single cylinder (low pressure) and double cylinder (high pressure cylinder and low pressure cylinder) (8-stage compression to 30bar), generally below 30barg, 5barG sealing gas is required (pressure nitrogen can meet the requirements).

The production scale of China's air separation equipment has changed from the early stage, which can only produce 20m3 / h (oxygen) oxygen generator. It has developed to the capacity of producing 20000 m3 / h, 30000 m3 / h, 50000 m3 / h and 60000m3 / h large-scale air separation equipment, and has completed the scientific research stage and is about to manufacture 80000m3 / h ultra large-scale air separation equipment.