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Cryogenic Air Separation Nitrogen
Jan 05, 2017

Nitrogen is a cryogenic air separation for traditional methods of nitrogen, has a history of recent decades. It is based on the air as raw materials, after compression, purification, recycling makes Air Liquide liquid heat exchangers. Air Liquide is mainly a mixture of liquid oxygen and liquid nitrogen, liquid oxygen and liquid nitrogen different boiling points (at 1 atmospheric pressure, the boiling point of-183 of the former, the latter is-196 ℃), through the distillation of liquid air, enabling them to obtain nitrogen separation. Cryogenic air separation nitrogen plant complex, covering an area of big, high infrastructure costs, higher equipment investment, higher operating costs, gas production slowly (12~24h), high installation requirements and a longer period. Integrated devices, installation and infrastructure factors 3500Nm3/h the following equipment, PSA equipment of the same lower investment than cryogenic air separation plant 20%~50%. Cryogenic air separation nitrogen generators are appropriate for large-scale industrial nitrogen and small and medium-size nitrogen is not economic.

Air separation by molecular sieve making nitrogen

With air as raw material, carbon molecular sieve as absorbent, the use of PSA, using carbon molecular sieves for oxygen and nitrogen-selective adsorption and separation of nitrogen and oxygen, commonly known as PSA nitrogen. This method is developed rapidly in the 70 's a new nitrogen technology. And traditional business nitrogen method compared, it has process simple, and automation degree high, and produced gas fast (15-30 minutes), and energy low, products purity can in larger range within according to user need for regulation, operation maintenance convenient, and run cost lower, and device adaptability strong, features, so in 1000Nm3/h following business nitrogen equipment in the quite competitiveness, increasingly get in the, and small nitrogen user of welcomes, PSA business nitrogen has became in the, and small nitrogen user of preferred method.