Pressure swing adsorption (PSA) technology is an advanced gas separation technology. Gas separation is based on the physical adsorption of gas molecules on the inner surface of adsorbent (porous solid matter), and it is realized by using the characteristics that adsorbent has different adsorption capacity for different gases under certain pressure. Carbon molecular sieve is an adsorbent for separating oxygen from nitrogen and extracting nitrogen from air. Under the same adsorption pressure, the adsorption capacity of carbon molecular sieve for oxygen is much higher than that for nitrogen. Nitrogen production by pressure swing adsorption, also known as carbon molecular sieve air separation nitrogen production, is based on this principle, using air as raw material, carbon molecular sieve as adsorbent, using pressure swing adsorption principle, using carbon molecular sieve to selectively adsorb oxygen and nitrogen, realizing the separation of nitrogen and oxygen in the air and producing nitrogen.
The whole set of pressure swing adsorption nitrogen production device includes:
Air compressor-air purification system-air buffer system-oxygen and nitrogen separation system-nitrogen buffer balance system
1, compressed air purification system: it removes dust, water and oil from compressed air, and consists of a three-stage filter, a freeze dryer and a high-efficiency degreasing agent.
2. Air buffer system: composed of air storage tanks and valves. Ensure that the oxygen-nitrogen separation system uses gas stably.
3. Oxygen and nitrogen separation system: the core of nitrogen production equipment, which realizes oxygen and nitrogen separation through pressure swing adsorption technology to achieve the purpose of nitrogen production. It consists of two adsorption towers equipped with carbon molecular sieves and automatic control valves.
4. Nitrogen buffer system: it stores nitrogen to ensure a stable and continuous supply of nitrogen, and consists of nitrogen buffer tanks, valves, etc.
5. Electrical control system: the control center of the equipment, which is mainly composed of PLC, circuit system, instruments and valves.