At present, carbon molecular sieves and zeolite molecular sieves are mostly used in nitrogen production and oxygen production in nitrogen generators. The separation effect of nitrogen generator molecular sieve on oxygen and nitrogen is mainly based on the different diffusion rates of these two gases on the surface of molecular sieve. Carbon molecular sieve is a carbon-based adsorbent with some characteristics of activated carbon and molecular sieve. Carbon molecular sieves are composed of very small pores, and the pore size of the nitrogen generator is distributed between 0.3nm and 1nm. Smaller diameter gas (oxygen) diffuses faster and enters the molecular sieve solid phase more, so that nitrogen-enriched components can be obtained in the gas phase. After a period of time, the adsorption of oxygen by molecular sieve reaches equilibrium. According to the different characteristics of carbon molecular sieve on the adsorption amount of adsorbed gas under different pressures, reducing the pressure makes carbon molecular sieve desorb oxygen. This process is called regeneration. The pressure swing adsorption method usually uses two towers in parallel, alternating pressurized adsorption and decompression regeneration, so as to obtain a continuous nitrogen flow.

The scope of the nitrogen generator
The nitrogen generator uses air as raw material, carbon molecular sieve as adsorbent, using the principle of pressure swing adsorption, and using carbon molecular sieve to selectively adsorb oxygen and nitrogen to separate nitrogen and oxygen, commonly known as PSA nitrogen production. This method is a new nitrogen production technology developed rapidly in the 1970s. Compared with the traditional nitrogen production method, the nitrogen generator has the advantages of simple process flow, high degree of automation, fast gas production (15-30 minutes), low energy consumption, product purity can be adjusted within a wide range according to user needs, operation and maintenance Convenience, low operating cost, strong device adaptability and other characteristics, so it is quite competitive in nitrogen generators below 1000Nm3/h, and is more and more popular with medium and small nitrogen users. PSA nitrogen generators have become medium and small nitrogen generators. Methods for nitrogen users.

Several Features of High Purity Nitrogen Generator
1. Three-stage catalysis, in addition to the two-stage catalysis in the electrolytic cell, there is also a third-stage catalysis. The catalyst is made of new precious metals, so that the oxygen content of the output nitrogen is less than 3ppm.

2. Easy to operate, free from the labor of transporting cylinders, and saves the pain of handling cylinders , The use is to turn on the power switch to produce nitrogen, which can be used continuously or intermittently, and the nitrogen production is stable and does not decay.
3. Program control. The control system of the high-purity nitrogen generator adopts a special chip. All the work process is controlled by the program. Automatic constant pressure, constant flow, nitrogen flow can be fully adjusted according to the amount of 0-300ml/min.
4. Low humidity for nitrogen production. It adopts ultra-high molecular weight osmotic separation technology and effective dehumidification device, thus reducing the original humidity and automatically draining water after shutdown. Using metal polymer dehumidification and two-stage adsorption, the nitrogen purity is greatly improved.
5. Advanced technology: The electrolytic cell adopts vertical single liquid surface double cathode. Membrane separation technology, the catalytic layer uses PCAN carrier and precious metal catalyst, so that the electrolytic cell has high catalytic efficiency, large gas production, and high nitrogen purity. The state is extremely stable.
6. Safe and reliable, equipped with installation device, sensitive and reliable.