With the rapid development of industry, nitrogen has been widely used in chemical industry, electronics, metallurgy, food, machinery, China's annual increase in nitrogen demand of more than 8%. The chemical nature of nitrogen is inert, showing a large inertia in the ordinary state, not easy to react with other substances. Therefore, in the metallurgical industry, the nitrogen of the electronics industry, the chemical industry is widely used in the protection of gas sealing gas, gas purity of 99.99% of the general protection requirements, and some require high purity nitrogen more than 99.998%. Liquid nitrogen is a more convenient cold source, which has been used more and more widely in food industry. In the fertilizer industry to produce synthetic ammonia, refined raw material gas hydrogen nitrogen mixture, if the use of pure nitrogen ammonia wash, so that a small amount of inert gas, sulfur dioxide and oxygen content of less than 20ppm.
Pure nitrogen can not directly sketch, the main method of air separation. Including: low temperature air separation method flue gas desulfurization baffle door, PSA (PSA), membrane separation. Now, nitrogen is mainly used in industrial gas business, large, there are a lot of machine manufacturers are also in the production of nitrogen nitrogen, as long as it will be the production of nitrogen making machine professional, although the state has developed more than nitrogen production machinery manufacturers. Because of its low temperature nitrogen use, complex equipment, and the area is large, so now is not the mainstream equipment, therefore, molecular sieve air and nitrogen is very mature, especially in the top of it is very convenient to use, automatic operation can be achieved, and it covers an area of relatively small, the operation cost is greatly reduced.
So now is the type of nitrogen machine is the choice of PSA nitrogen machine, then what is the principle. First of all, it is in the process of screening, adding carbon molecules, the carbon molecular gas of oxygen and nitrogen adsorption, environmental temperature, and then the whole machine itself, the nitrogen and oxygen separation, can finally obtain high purity nitrogen, but also because its main work is based on the screen, so it is used as a molecular sieve nitrogen machine.
