Desalination Plants
WME today is producing and selling desalination plants in the order of magnitude of a potable water production of about 20 m3/h. To run this plant a power of about 300 kW is necessary. Therefore the highlight of the WME plants is the wind-driven salt water desalination plant. But dependent of the price for the kilowatt hour the WME-plant can also be operated by diesel generators or by the public electrical grid. Because of the intensive R + D work the WME-plant has a special design, resulting to following convincing advantages:
Details:
- Flexible Process
runs independent of composition of feed water, no costly pretreatment necessary since a coarse filter is sufficient - Long Lifespan
all parts (incl. electrical components) are designed for a long-term operation, materials with maximum resistance to corrosion and temperature used, no fouling or scaling - Easy Operation
fully automatic plant, remotely operated and monitored, minimal maintenance required can be started without preparation after shutdown - High Quality Water
suitable for drinking, irrigating farmland and industrial use - Economic Benefits
Energy-saving technology with added value for the region in form of e.g. agricultural improvements or salt works - Versatile power supply
can be connected to the power grid or operated offgrid using renewable energy plants (wind, solar, biogas) or diesel generators - Compact Design
Plant is pre-installed in standard sea containers making it easy to transport and quickly installed - Environmentally Safe
no chemical additives, no emissions, no heavy metals discharged
Technical Conception
Serving the purpose of preheating the saltwater (1) streams in through two parallel arranged plate heat exchangers (2), in which the heat is transfered from the outcoming destillate and brine to the incoming saltwater. The pressure within the following degasifyer (3) is almost reduced to the evaporation pressure level of the preheated saltwater. The air dissolved in the saltwater escapes and is removed by the vacuum pump. The degasified saltwater is passed on into the combined evaporator-condenser unit (4) which consists of a common bundle containing about 1,000 tubes. A circulation pump and spezial nozzle arrangements ensure an equal water film on the inner surface of the tubes. The water evaporates here. The resulting vapour - after having been compressed (5) - is led to the outer tube surface with rising temperature where it condenses. At the same time the released condensation heat and the higher temperature of the vapour can be used for the evaporation of an equivalent amount of saltwater.
As the salt concentration of the saltwater within the evaporator should not exceed the value of about 10,5 %, concentrated saltwater (7) is continuously led back into a well through the heat exchanger and is replaced by fresh saltwater. The gained distillate (8) is collected in an intermediate storage tank, from where it is pumped to the customers. Depending on local conditions the distillate can be disinfected, e.g. by chlorination or irradiation with ultraviolet light. The remineralization of the distillate can be realized by adding the appropriate minerals or also by mixing it with a small amount of disinfected saltwater. Each kilowatt hour generated by the windpower plant is entirely used for the production of the distillate. The production of electric energy by the wind power plant equals the used energy of the desalination plant at any time.
Parameters
- dimensions: desalination container
- (length x width x height)
- 2900 x 2440 x 12200 mm
- container, 1 pieces
- (length x width x height)
- 12200 x 2440 x 2900 mm
- weight: about 25.000 kg (desalination container)
- power supply: 3 x 400 V three phase current, 50 Hz, 350 kW
- distillate production: max. 20 m³/h (at a salt concentration £ 3,5 %)
- potable water: salt content corresponding WHO standard seawater flow: max. 40 m³/h (inlet)
- brine flow: max. 10 m³/h (outlet)
- salt concentration of the brine: 10,5 %
- operation: completely automatic
- monitoring: with modem
- electric equipment: corresponding german regulations (VDE)
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