Working principle

When the air pressure increases, carbon molecular sieve will absorb a large amount of oxygen, carbon dioxide and water. When the pressure drops to normal pressure, the adsorption capacity of carbon molecular sieve for oxygen, carbon dioxide and water is very small.
 

The PSA equipment is mainly composed of A and B adsorption towers and control systems with carbon molecular sieves. When compressed air (pressure is generally 0.8MPA) passes through tower A from bottom to top, oxygen, carbon dioxide and water are absorbed by carbon molecules, while nitrogen is passed through and flows out from tower top. When the molecular sieve in tower A is saturated, it will switch to tower B for the above adsorption process and simultaneously regenerate the molecular sieve in tower A. The so-called regeneration refers to the process that the gas in the adsorption tower is evacuated to the atmosphere so that the pressure can rapidly reach normal temperature, and the oxygen, carbon dioxide and water absorbed by the molecular sieve can be released from the molecular sieve. PSA nitrogen production unit technology is a high-tech energy-saving separation technology that directly produces nitrogen from air at normal temperature, and has been applied for decades.

Application field and use of nitrogen

Electronic industry: nitrogen protection for semiconductor and electronic components production
 

Heat treatment: bright annealing, protective heating, metallurgy and magnetic material sintering, etc
 

Food industry: equipped with sterilization filter, which can be used for nitrogen filling packaging, grain storage, fruit and vegetable preservation, wine packaging and protection
 

Charcoal industry: underground explosion-proof and kerosene fire extinguishing
 

Chemical industry: nitrogen coverage, replacement, cleaning, pressure transmission, chemical reaction agitation, chemical fiber production protection, etc
 

Oil and gas industry: oil refining, nitrogen filling and purging of vessels and pipelines, leak detection, nitrogen injection and oil recovery
 

Pharmaceutical industry: nitrogen-filled storage of Chinese and western medicine, and transfer of nitrogen-filled medicine materials
 

Cable industry: cross-linked cable production and protective gas
 

Others: metallurgical industry, rubber industry, aerospace industry, etc

Photos of nitrogen generator