The principle of the nitrogen and oxygen production air separation plant is to use air as raw material and use physical methods to separate and purify the oxygen and nitrogen in it. The purpose of the nitrogen and oxygen production air separation plant is for steelmaking. Oxygen and nitrogen are important metallurgical raw materials. Due to different brands, the price of nitrogen and oxygen production air separation plant is also different. Oxygen and nitrogen are in great demand in industrial production, but the requirements for purity are generally not very strict. On site nitrogen and oxygen production refers to the nitrogen and oxygen production air separation plant purchased by users. There are three types of industrial scale nitrogen production: cryogenic air separation, PSA and membrane separation. The liquid air separation method is used to separate oxygen and nitrogen according to the different boiling points of each air. Usually, nitrogen bottles are painted black, oxygen bot