PSA nitrogen generator widely used in industry

With the rapid development of industry, nitrogen has been widely used in fields such as chemical engineering, electronics, metallurgy, food, and machinery. China's demand for nitrogen is increasing at a rate of over 8% per year. The chemical properties of nitrogen are not active, and it exhibits great inertness in its normal state, making it difficult to undergo chemical reactions with other substances. Therefore, nitrogen is widely used as a protective gas and sealing gas in the metallurgical industry, electronic industry, and chemical industry. The purity requirement for protective gas is generally 99.99%, and some require high-purity nitrogen above 99.998%. Liquid nitrogen is a convenient energy source that is increasingly being used in the food industry, medical industry, and animal husbandry for semen storage. In the production of synthetic ammonia in the fertilizer industry, if the raw material gas hydrogen and nitrogen mixture for synthetic ammonia is washed and refined with pure liquid nitrogen, the content of inert gas can be extremely small, with sulfur monoxide and oxygen content not exceeding 20ppm.
Pure nitrogen cannot be directly extracted from nature and is mainly obtained through air separation. Air separation methods include cryogenic method, pressure swing adsorption (PSA) method, and membrane separation method.