The three most important processes in sea water desalination are:
- RO – Reverse Osmosis (membrane process)
- MED – Multi-effect distillation
- MSF – Multi-stage flash
Evaporators are used in the MED- and MSF-processes. These operate under vacuum in order to achieve the best performance rate. In all cases, the vacuum is created using multi-stage steam jet vacuum pumps. Together with the corresponding condensers, these vacuum pumps are an integral part of the evaporation plant and are therefore becoming an increasing focus of attention.
Reverse osmosis is one of the most common methods for the desalination of sea water. In order to remove the insoluble substances in sea water, a flotation or ultrafiltration unit is generally installed upstream of the processing installations. This results in sedimented sludge and back-flush water, which have to be disposed of as a result of organic contamination.
Volume-reduced sludge lower disposal and transportation costs
The use of GEA decanters enables transportation and disposal costs to be efficiently reduced, as these machines reliably separate the sludge into solids and reusable water. Thanks to their high dewatering capacity, they are able to concentrate the solids up to 25 percent dry matter; this results in a considerable reduction in volume and correspondingly lower disposal costs.
Maximum reliability thanks to robust design
In order to permanently avoid corrosion even in conditions of extremely high chloride ion content in sea water, we only use high-quality materials for designing our decanters. All components which come into contact with product are therefore generally made from duplex/super duplex steel, and feature maximum reliability.
- Decanter for concentrating sediment and filtration back-flush water
- Reduction in the consumption of water
- Volume-reduced solids with high dry matter content
- Lower transportation and disposal costs
- Robust design due to use of corrosion-resistant materials
Other applications
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