Metal Processing Industry Pressure Swing Adsorption Nitrogen Generator ≤0.7Mpa

Applications
- Food packaging (cheese, salami, coffee, dried fruit, herbs, fresh pasta, ready meals, sandwiches,etc. ..)
- Bottling wine, oil, water, vinegar
- Fruit and vegetable storage and packing material
- Industry
- Medical
- Chemistry

PSA Nitrogen Generator System is used worldwide.

Principle of Operation

Under the balance of adsorption, when any kind of adsorbent adsorbs the same gas, the higher the gas pressure, the greater the adsorption capacity is. Otherwise, the lower the pressure, the smaller the adsorption power

carbon molecular sieve shows difference in adsorbing oxygen and nitrogen. Carbon molecular sieve is a substance with a lot of micropores inside. The PSA principal is to achieve the separation goal of oxygen and nitrogen which based on the adsorption quantity difference in the carbon molecular sieve when the pressure is certain.

When the pressure rises, the carbon molecular sieve adsorbs the oxygen and produces the nitrogen gas. When the pressure decreases, the carbon molecular sieve starts to desorb the oxygen until the pressure equals to the ordinary pressure. At that time, the carbon molecular sieve desorbs the oxygen completely. The PSA nitrogen generator is usually equipped with adsorption towers. It controls the pneumatic valve by PLC, thus the two adsorption towers can produce the nitrogen gas alternatively. One tower adsorbs the oxygen and produces nitrogen gas, the other desorbs to regeneration to produces the required nitrogen.

Process Flow Brief Description

Composition of PSA nitrogen making machine

Compressed air purification system:Carbon molecular sieve is the key material to determine the production capacity of nitrogen machine. Since the compressed air provided by air compressor usually contains oil and water, oil and water will reduce the adsorption capacity of carbon molecular sieve, so the compressed air needs to remove oil and water before entering the oxygen and nitrogen separation system. Firstly, the air is compressed by the compressor to be 0.75-1.0 MPa and enter air purification system, the pipeline filter will remove most of the water, oil and mechanical impurities, and then the freeze drying machine dewaters by cooling and make the pressure dew point to be 2 ℃ to 10 ℃, furthermore, the air is processed by the precision filter, super precision filter and activated carbon degreaser, the air with pressure 0.75-1.0 MPa, pressure dew point with 2 ℃ to 10 ℃, and the oil content less clean 0.01 PPm will be got. Compressed air purification system is composed of pipeline filter, freeze-drying machine, fine filter, ultra-fine filter, activated carbon deoiler, automatic sewage valve, ball valve and so on.