New Generation Cryoplants

Compact, Economic, Elegant & Intelligent

The technology used in our new generation liquid nitrogen plants purifies nitrogen from the air around the plant and converts it to LN2. You can fill your dispensing thermos or transfer LN2 to an external Dewar via a flexible hose attached to the plant. This is all done through the simple push of a button. Moreover, LN2 transfer is independent from the system’s operation mode. The PLC automatically re-starts when the level drops to 70% in the internal storage Dewar, and will stop the plant when the Dewar is full. The generator goes into standby mode until some LN2 is transferred, thereby emptying the storage Dewar and getting the plant ready for production of new LN2.

Imtek Cryogenics offers a wide range of Nitrogen, Argon, and Oxygen Liquefiers with capacities between 10 and 500 Lt/Day or larger depending on your needs. Contact Imtek Cryogenics for all your cryogenic applications and custom-made engineering solutions.

Cryogenic Nitrogen
Plant Technology

The atmospheric air is pressurized by a compressor and fed to a buffer tank. The pressurized air in the buffer tank, then, directed to the filter group which are located behind the cryoplant in order to separate water droplets and microscopic contaminants from the air. After this first filtering step, remaining moisture in the air is removed by the internal air dryer unit.

The treated dry and clean air with a dew point of -70 °C flows to one of the adsorber beds of the Pressure Swing Adsorption (PSA) module. The carbon molecular sieve in PSA beds adsorbs the oxygen and carbon dioxide molecules in the dry air.

After the saturation of the first adsorption bed, feed flow process valves are switched to the second adsorption bed. Then, the first adsorption bed is depressurized rapidly and purged to remove the adsorbed oxygen. By continuing the switching between the two adsorption beds, a constant flow of pure nitrogen gas is achieved.

Therefore, by the PSA technology utilized in cryoplants, nitrogen gas at the correct purity level is provided to liquefier. This pure nitrogen gas, then, is exposed through the buffer tank to the cryocooler that is located vertically in a cryogenic storage vessel.