Using air as raw material to produce equipment nitrogen, the oxygen and nitrogen obtained are separated by physical method.

Cryogenic air separation nitrogen nitrogen is a traditional method in recent years. It is based on air as raw material, after compression, purification, recovery of heat exchange of atmospheric liquid air liquefaction. With air as the raw material, carbon molecular sieve as the adsorbent, the principle of pressure swing adsorption, selective adsorption of oxygen and nitrogen, nitrogen and oxygen using the separation of carbon molecules, called PSA nitrogen production. Compared with the traditional nitrogen method, it has the characteristics of simple process flow, high degree of automation, fast gas production (15 ~ 30 minutes), low energy consumption, a wide range of product purity can be adjusted according to user needs, easy operation and maintenance, low operating cost, and strong adaptability of the device.

Membrane air separation nitrogen production: with air as the raw material, under certain pressure conditions, there are different permeation rates of membrane separation nitrogen and oxygen in the utilization of different oxygen and nitrogen gases. Compared with other nitrogen production equipment, it has the advantages of simple structure, small size, no switching valve, less maintenance, fast gas production (≤3 minutes), and easy to expand, which is especially suitable for ≤ 98% nitrogen purity, and has the best performance-price ratio in small nitrogen users.

With air as the raw material, carbon molecular sieve as the adsorbent, the principle of pressure swing adsorption, selective adsorption of oxygen and nitrogen, nitrogen and oxygen using the separation of carbon molecules, called PSA nitrogen production. The method is a new nitrogen production technology that is rapidly developing in seventy. Compared with the traditional nitrogen method, it has a simple process, high degree of automation, fast gas production (15 ~ 30 minutes), low energy consumption, a wide range of product purity can be adjusted according to user needs, easy operation and maintenance, low operating costs, strong device adaptability and other characteristics, so the competitiveness of 1000nm3 / h nitrogen production equipment, more and more. In small nitrogen users, PSA nitrogen production has become the preferred method for small nitrogen users.