For gas producers who market helium worldwide, as well as research institutes with helium requirements in excess of the standard ratings, Linde Kryotechnik has developed a series of special systems with a liquid helium output ranging from 350 to well over 3500 l/h. In bulk liquefier systems, impurities are removed from the helium prior to liquefaction in separate process steps, such as pressure swing adsorption. In these units, physical, chemical or cryogenic processes are used for accumulation/liquefaction of impurities.
The main components of a helium liquefier are:
- oil-injection screw compressors
- vacuum-insulated cold box
- aluminium-plate heat exchanger
- TED expansion turbines with dynamic gas bearing
- liquid helium storage tank
- control system
Further system components such as:
- raw gas compressors
- purification systems
- gas storage tanks
- helium recovery
- filling stations
are designed, supplied and installed by Linde Kryotechnik.