The APSA course of action In Nitrogen Generataors
Some of the new-generation nitrogen generators use the APSA course of action to generate nitrogen. This APSA course of action relies on the fractionated distillation of air at very low (cryogenic) temperatures, and in only one column. In other words, APSA nitrogen generators are nitrogen generators that use cryogenic distillation of air to generate nitrogen.
After the air is being compressed, it is purified in the nitrogen generator, so that the cryogenic operation runs smoothly. The air is being compressed at around 9 bars with a centrifugal or a screw compressor and afterwards cooled down with the help of a cooling unit.
The air that runs by the nitrogen generator must then be purified, so it passes by several filters and cooled down some more.
Afterwards the criogenic course of action must intervene, so the air enters a special area of the nitrogen generator, the cooling area, and then the oxygen in the air is separated from the nitrogen. At the bottom of the area there will be a liquid that is oxygen-high and at the top the desired nitrogen.
The low temperature inside the nitrogen generator is maintained using a small quantity of liquid nitrogen, which is then additional at the produced nitrogen.
This course of action is designed so that its all automatically controlled, it requires no manual procedures. If problems occur, the nitrogen generator is produced so that it will try to solve them on its own.
For example, if the nitrogen consumption increases, a pressure regulator will continue the normal pressure. Or, if the concentration of oxygen is too high, the APSA course of action is automatically closed and the excess of oxygen is ventilated outside. Furthermore, the nitrogen generator waits for the oxygen levels to decline, and if they dont, the whole system is shut down. When this occurs, the nitrogen generator takes safety precautions.