The nitrogen making machine mainly consists of refrigeration system and distillation nitrogen making machine workflow system. It can be divided into ten systems, namely, compressed air system, air purification system, heating system, refrigeration system, distillation system, safety protection system, compressed oxygen delivery system, heating defrosting system, instrument control system and electrical control system.

Process air separation device, according to the requirements of the design specification, not only to ensure the quality and quantity of the product, low power consumption, investment, but also to ensure safe operation and easy maintenance.

Classification of nitrogen machine, according to the state of the product is divided into oxygen, oxygen, gas and liquid nitrogen machine oxygen production; There are single, double high products (oxygen, nitrogen) with argon-oxygen (oxygen, nitrogen and argon) and total extracts (oxygen, nitrogen, argon and other noble gases). The working pressure of the nitrogen machine is determined by the pressure and temperature of the circulating system. The high-pressure process of the liquefaction cycle is based on the throttling of the low temperature cycle. The pressure flow of the liquefaction cycle is a Claude cycle, based on the Kapitza cycle of the low-flow liquefaction cycle.

Nitrogen making machine according to the type of heat exchanger, can be divided into plate, tube, tube plate manufacturing machine. The production of small nitrogen machines in China is still controlled by medium pressure. In a large, regenerator or type switching heat exchanger process and molecular sieve is advanced, supercharged turboexpander flow.