What is PSA Oxygen Generator?

PSA oxygen generator uses clean compressed air as the raw material and high-quality zeolite molecular sieve as the adsorbent to produce oxygen from the air under a certain pressure. The purified and dried compressed air is subjected to pressure adsorption and decompression desorption in the adsorber. Due to the aerodynamic effect, the diffusion rate of nitrogen in the micropores of zeolite molecular sieve is much faster than that of oxygen, nitrogen is preferentially adsorbed by zeolite molecular sieve, and oxygen is enriched in the gas phase to form finished oxygen. After decompression to normal pressure, the adsorbent desorbs the adsorbed nitrogen and other impurities to realize regeneration. Generally, two adsorption towers are set up in the system, one tower absorbs and produces oxygen, and the other tower desorbs and regenerates. The PLC program controller controls the opening and closing of the pneumatic valve to make the two towers circulate alternately, so as to obtain oxygen with high purity (93%±3%).

Features and Technical specifications of PSA Oxygen Generator

1. Features of PSA oxygen generator

• Quick start-up, qualified oxygen can be provided within 15-30 minutes;
• The equipment runs fully automatically, and the whole process can be unattended;
• Efficient molecular sieve packing, tighter, more solid, longer service life;
• Stable and adjustable pressure, purity and flow rate to meet different needs of customers;
• Reasonable structure, safe and stable, low energy consumption;

2. Technical specifications

• Oxygen volume: 1～300Nm3/hr
• Purity: 93%±3%
• Pressure: 0.01~0.6 Mpa (adjustable)
• Atmospheric dew point: -40°C~-70°C (adjustable)

How to choose a PSA oxygen generator?

Among the core parameters of oxygen generator equipment, flow rate is undoubtedly one of the most important parameters. It represents the amount of gas consumption required by the user, and the unit of measurement is Nm3/h. Then is oxygen purity, which represents the proportion of oxygen in the produced gas. Secondly, the pressure, which refers to the outlet pressure of the equipment, is generally 0.3-0.5MPa. If the process requires higher pressure, it can also be pressurized as needed. The last is the dew point, which represents the water content in the gas. The lower the dew point, the less water in the gas. The normal pressure dew point of the oxygen produced by the PSA oxygen generator is ≤ -40°C. If it needs to be lower, you can also consider adding a absorption air dryer or a refrigeration air dryer.

 

Maintenance Tips

It is necessary to maintain for daily use and pay enough attention to equipment maintenance. Good operating habits and regular maintenance can prolong the normal service life of equipment, reduce energy consumption, reduce maintenance costs, effectively avoid sudden failures, and greatly reduce the negative impact of failures on production.

1. Normal supply of power, water, air and temperature conditions required by the machineshould be ensured. Normal opening and closing are also important, especially the stability of the power supply voltage. If necessary, a voltage stabilizer can be installed to reduce the damage to the controller and electromagnetic caused by power supply problems.
2. Pay attention to the air volume, temperature and pressure at the inlet of the cold dryer at any time, and keep the evaporation pressure of the cold dryer between 0.4 and 0.5 MPa, and do not exceed the rated value.
3. Check the automatic drain valve of the filter and the automatic drain of the cold dryer every day to avoid clogging,drainage and sewage discharge.
4. Regularly check whether the heat sink of the cold dryer is clean every week, so as not to affect the effectiveness and life of the dryer due to poor heat dissipation.
5. Perform operation and daily maintenance according to the requirements of the User Manual, and check the sensitivity of the solenoid valve/pneumatic valve, the pressure range of the pressure regulating valve, the accuracy of the gas analyzer, the compression of the adsorption tower, and the exhaust state of the muffler from time to time.