This cryogenic technology oxygen plant is equipped with a nitrogen circulation refrigeration process. In some special processes, nitrogen itself is used as the circulating working medium.

The main cooling capacity required by the device is provided through the expander to achieve internal circulation within the system.

This cryogenic technology oxygen plant is equipped with nitrogen-side liquefaction technology. To produce liquid nitrogen, it can be liquefied by introducing part of the product nitrogen gas into the main cooler or an independent condenser, or by utilizing the coldness of the backflow of contaminated nitrogen.