In this project, EBNER developed a process specially tailored to the requirements of saline. The brine is first obtained by cavern exploitation and pre-cleaned in a brine cleaning stage. The evaporation plant is operated with mechanical vapour recompression (turbo compression), which means that electrical energy is used instead of steam energy for evaporation.
The NaCl salt produced in this process is separated. The remaining saturated hot mother liquor is partially flashed in a downstream multi-stage plant under vacuum, whereby NaCl salt is additionally crystallized out. The vapour obtained in the stages through expansion heats the respectively next stage and ensures additional evaporation without using additional heating energy, which saves energy. The produced salt is separated and fed together with the salt produced in the evaporation plant to the drying, packaging and storage system.
Within the context of this project, EBNER was able to demonstrate its competence for difficult on-site assembly work. For example, the evaporator with a diameter of more than 6 m was prefabricated in the factory-internal halls and assembled at the customer’s site. A great hurdle was the high-quality material and the associated complex welding works including post treatment.