Nitrogen has a wide application as protection or seal gas to promote the product quality in various industries as metallurgy, petrochemical, electronics (including integrate circuit and kinescope), medicine, building material electro-magnetic, colored metal, textile, heat treatment and etc. Nitrogen can also be used as chemical raw materials, liquid nitrogen can be used for cold source needs.
By cryogenic separation, both gas and liquid nitrogen could be produced with different pressure varying from 0.2MPa to 0.9Mpa. Meanwhile, producing nitrogen with two pressure stages simultaneously is available as well. The purity reaches as high as 0.01PPm O2
Developing as the science and technology, with ever-increasing quality of products, there would be a wider application of nitrogen, and a higher requirement of its purity. Nitrogen is reputed as the “industrial salt”, it is playing a more and more important role in modern industrial civilization
