At present, the VPSA oxygen production process, which represents the international level, takes reducing the power consumption and equipment investment as the starting point

1. A new type of lithium molecular sieve adsorbent is used to improve air utilization and reduce energy consumption by utilizing its high adsorption capacity and high nitrogen and oxygen adsorption selectivity;

2. The energy-saving and water-saving roots blower and wet roots vacuum pump are used as raw air compression and waste gas desorption equipment to further reduce the power consumption of oxygen production;

3. Using short switching period can reduce the amount of adsorbent, reduce the number of adsorption tower and adsorption valve as much as possible, so as to greatly reduce the equipment area and total investment. For VPSA oxygen plant, power consumption is the most important factor to determine the cost of oxygen production, and also the most important index to measure the advanced technology and economic performance of oxygen production equipment, which is directly related to the operation cost and economic benefits of the plant.

Therefore, the long-term reliability of oxygen generation equipment must be guaranteed by reasonable design of oxygen generation process and process. On the premise of ensuring the reliability of the whole equipment, appropriate measures should be taken to increase the amount of adsorbent and reduce the desorption pressure ratio.