1) low temperature distillation process;
High-purity nitrogen can be prepared, and the purity is more than 99.999%.
It is the oldest, most advanced and most widely used way at present.
The model can be selected according to the size of the equipment.
2) Normal temperature process
Pressure swing adsorption and membrane nitrogen production
Generally, low-purity nitrogen is prepared, such as 95%~99.99%.