Air separation equipment refers to a device that uses air as raw material to separate various gases such as oxygen and nitrogen in the air by cryogenic separation or adsorption separation. The air separation plant is mainly composed of eight systems, namely compression system, purification system, refrigeration system, heat exchange system, rectification system, product conveying system, liquid storage system and control system.
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).
Strictly speaking, the heat exchange system is designed with multi stream mixed media in the same heat exchanger, so that the heat transfer of each medium is automatically balanced and the energy consumption is the lowest. However, for the internal compression process, all heat exchangers will be high-pressure heat exchangers, which will increase the accumulation of investment.