Seawater desalination device
Product name: Seawater desalination device
Marine/ land seawater desalination; high salinity brackish water
desalination; high-end users for yachts and seaside villas.
PLC Control, which can reduce manual manipulation and risk of operatingerrors, to ensure long working life of the plant.
Widely used for marine seawater desalination plant, land-based
seawater desalination system, containerized equipment, modularized
equipment and brackish water desalination.
Effectively remove organic salt, heavy metal ions, organics,
bacteria, germs and other harmful substances. Simple operations,
easy maintenance, instance water supply. High pressure pumps are
selected from Chinese/ international known brands especially
designed for RO systems. High/low protection devices for safe
operation. Fully automatic multi-way combination valves for high
flux reverse rinse.
The pretreatment includes all the necessary treatment step ahead of
the reverse osmosis plant. It is determining for plant life time
and to minimize chemical cleaning and membrane replacement. It has
a direct impact on the plant performance.
Before the RO process, seawater entering the desalination plant
flows through screens that remove debris, then goes through a
traditional treatment process called coagulation and flocculation.
In this process, chemicals are added to the seawater to make algae,
organic materials and particles clump together so they can be
removed more easily in the sand filtration stage.
After sand filtration, the salty water goes through diatomaceous
earth filters to remove silt and fine particles. Cartridge filters
just before the RO membranes serve as a backstop, removing any
particles that may be remaining after the diatomaceous earth
Next is the RO process. High pressure forces the pretreated water
through semi-permeable membranes to separate the freshwater,
leaving twice-as-salty seawater and other minerals behind.
The size of each RO membrane pore is about .001 microns, which is
about 1/100,000th the diameter of a human hair.
Post-treatment, Blending and Delivery
After the RO process,chemicals are added to stabilize the
The reverse osmosis process can also be built with one or two
passes, depending on the product water requirements and the
seawater salinity and temperature. In most cases, 1 pass is
sufficient to reach the EU drinking water standards, specially
regarding the boron content (1 mg/L). To reach WHO boron guideline
(0.5mg/L), a second pass might be necessary (Boron removal process)
The energy recoverydevice is the key factor that determines the plant electrical
costs. It must be chosen carefully based on the local energy costs
and environment policies.
Post-treatmentand/or polishing steps are required to condition the water after
the reverse osmosis membrane process to make it suitable to your
Brine disposal can be an environmental and economical issue in some
areas where the fauna and flora are sensitive to local seawater
salinity increase. Brine disposal should be studied and engineered
case by case.
The art of desalination is to determine and combine available
technologies to optimize water production costs and quality.
To adapt our Desalination Plants to your local needs, we offer
containerizedmobile units from Intake to Distribution up to a production
capacity of 200 m3/h of desalinated water.
All type of water can be produced from a desalination plant:
- WHO or EU drinking water
- Irrigation water
- Process waterboiler feed water, cooling water
- Demi or Ultrapure water
All type of natural seawater source can be treated
- Shallow Surface seawater
- Deep seawater
- Brackish river water
- Beach well seawater
|Salt rejection:||≥ 98%|
|Feed water temperature:||2-40℃|
|Pure water recovery rate:||35%－40%|
|Output pressure：||＜0.5 Mpa|