Membrane nitrogen generator technology is simple and effective

The gas separation technology we use is mature and reliable. On our nitrogen generators, we use membrane separation technology and pressure swing adsorption technology to produce nitrogen. If our customers prefer a certain technology, we can recommend the appropriate model according to the customer's preference. However, for some specific application equipment, using one of these separation technologies is more advantageous than the other.
The membrane separation nitrogen generator allows compressed air to pass through the hollow fiber membrane. When the air passes through the membrane, the oxygen, carbon dioxide, carbon monoxide and water vapor in the air will pass through the small holes in the hollow fiber membrane pipe and then be discharged into the atmosphere. At the exit of the membrane, large-size nitrogen molecules and inert gas argon are collected and transported to the application equipment. This nitrogen separation and extraction technology is simple and effective without any moving parts. The separated and extracted nitrogen gas has the highest purity of 99.5% without any impurities.
Pressure swing adsorption technology uses solid media to separate a single component in a gas mixture, and uses pressure swing adsorption technology to separate nitrogen in the air. The required solid media is carbon molecular sieve, which selectively adsorbs oxygen in the air. Thereby, nitrogen and oxygen in the air are separated under pressure.
Carbon molecular sieve is actually porous and loose rod-shaped carbon particles. When compressed air (the main components are nitrogen, oxygen, inert gas argon and a small amount of water vapor) is filled into a nitrogen purification sealed column filled with carbon molecular sieve particles, the carbon molecular sieve will Absorb water vapor and oxygen, but nitrogen will not be adsorbed. This is mainly because the molecular sizes of nitrogen and oxygen are different. The small holes on the carbon molecular sieve particles allow oxygen with small molecular sizes to enter, but cannot allow nitrogen to enter, because the molecular size of nitrogen is larger than oxygen; thus, nitrogen and oxygen are separated opened.
The pressure swing adsorption process consists of two steps and stages:
1. In the adsorption stage, the oxygen, water vapor, and carbon dioxide in the compressed air are adsorbed by the carbon molecular sieve column, and the nitrogen is collected and stored.
2. In the regeneration stage, the pressure of the carbon molecular sieve column is released to the atmosphere, and the carbon molecular sieve particles that have adsorbed oxygen, carbon dioxide and water vapor release the adsorbed oxygen, carbon dioxide and water vapor, so as to prepare for the next adsorption.
The pressure swing adsorption process needs to maintain a stable temperature, which is usually close to the ambient temperature of the laboratory (20-25°C). The nitrogen produced by pressure swing adsorption technology has the highest purity of 99.999%. The higher the purity, the more air needs to be consumed in the production process.
Pressure swing adsorption technology and membrane separation nitrogen generator technology to produce nitrogen have their own advantages and disadvantages. The specific method used to produce nitrogen depends on the application and flow rate requirements. In the market, some people say that nitrogen membranes and carbon molecular sieves are consumables and need to be replaced regularly. This is wrong. If the user's degreasing and dewatering filter is not effective, the separation effect of carbon molecular sieve and nitrogen membrane will gradually become invalid as the service life increases.