BE1024630B1 - Device for the desalination of water by means of locally produced green energy - Google Patents

Abstract

Device for the desalination of water (1) by means of green energy, with which a reverse osmosis desalination plant (12, 13) is driven which converts salt or brackish water (44) into product water (28), characterized in that this device over has its own local green energy production and is autonomously managed by a central control unit (18) that adjusts the production of product water to local needs and expectations and to the fluctuating and expected local green energy production.

Description

(30) Priority data:

(73) Holder (s):

RENT A PORT UTILITIES public limited company

2000, ANTWERP

Belgium (72) Inventor (s):

(54) Water desalination plant using locally produced green energy (57) Green water desalination plant (1) using green energy, which drives a reverse osmosis desalination plant (12, 13) or brackish water (44) converts into product water (28), characterized in that this installation has its own local green energy production and is managed autonomously by a central control unit (18) that adapts the production of product water to local needs and expectations and to the fluctuating and expected local green energy production.

BELGIAN INVENTION PATENT

FPS Economy, K.M.O., Self-employed & Energy

Publication number: 1024630 Filing number: BE2016 / 5766

Intellectual Property Office

International classification: C02F 1/44 B01D 61/02 Date of issue: 14/05/2018

The Minister of Economy,

Having regard to the Paris Convention of 20 March 1883 for the Protection of Industrial Property;

Having regard to the Law of March 28, 1984 on inventive patents, Article 22, for patent applications filed before September 22, 2014;

Having regard to Title 1 Invention Patents of Book XI of the Economic Law Code, Article XI.24, for patent applications filed from September 22, 2014;

Having regard to the Royal Decree of 2 December 1986 on the filing, granting and maintenance of inventive patents, Article 28;

Having regard to the application for an invention patent received by the Intellectual Property Office on 12/10/2016.

Whereas for patent applications that fall within the scope of Title 1, Book XI, of the Code of Economic Law (hereinafter WER), in accordance with Article XI.19, § 4, second paragraph, of the WER, the granted patent will be limited. to the patent claims for which the novelty search report was prepared, when the patent application is the subject of a novelty search report indicating a lack of unity of invention as referred to in paragraph 1, and when the applicant does not limit his filing and does not file a divisional application in accordance with the search report.

Decision:

Article 1

RENT A PORT UTILITIES public limited company, Jordaenskaai 25 box 6, 2000 ANTWERP Belgium;

represented by

VAN VARENBERG Patrick, Arenbergstraat 13, 2000, ANTWERP;

a Belgian invention patent with a term of 20 years, subject to payment of the annual taxes as referred to in Article XI.48, § 1 of the Code of Economic Law, for: Device for desalinating water using locally produced green energy .

INVENTOR (S):

PRIORITY:

BREAKDOWN:

Split from basic application:

Filing date of the basic application:

Article 2. - This patent is granted without prior investigation into the patentability of the invention, without warranty of the Merit of the invention, nor of the accuracy of its description and at the risk of the applicant (s).

Brussels, 14/05/2018,

With special authorization:

B E2016 / 5766

Device for desalinating water using locally produced green energy.

The present invention relates to a device for desalinating water using locally produced green energy.

More specifically, the invention is intended for desalinating sea water or river water into desalinated water for the purpose of obtaining potable water or agricultural irrigation water or still demineralized water. We call this desalinated water product water.

Climate change is known to raise the average temperature on Earth, increasing annual rainfall in certain areas and decreasing in others, but sea level is rising everywhere. As a result, seawater penetrates more inland and salinates many a freshwater source and groundwater, especially in coastal areas.

There is a shortage of freshwater resources in the coastal areas of a number of countries in Southeast Asia, Africa, India and South America. This problem has a negative impact on agricultural activities and on the living conditions of the local residents.

In addition, high population growth in developing countries in Africa, Southeast Asia, India and

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South America has higher demand for product water, while supplies are decreasing.

Water scarcity also threatens the lives of Africans in areas such as Mauritania and Namibia. There is not enough drinking water, resulting in health problems.

The salinity of the water and the drought of the country depends on the location and the season in the area concerned. For example, the salinity reaches its highest values in coastal areas, but the salinization problem is especially worrying in the dry season due to the reduced rainfall. Local desalination plants must be available to meet this requirement.

A known technique for desalinating seawater or brackish water is the reverse osmosis, in which the seawater or brackish water is pressurized against a membrane, after which salt-free product water is transported through the membrane and this product water appears on the low-pressure side, while the dissolved substances like salt ions can't get through.

The reverse osmosis does not require thermal energy, but electrical energy to obtain the pressure increase. Reverse osmosis is therefore relatively energy efficient. Energy consumption has now fallen to about 3 kWh / m ^{3 of} water (Reverse Osmosis, Wikipedia), but it does require an electrical energy source.

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In many remote areas of Africa, Southeast Asia, India and South America, there is no access to a public electricity grid, and certainly not to green renewable energy that is preferable to avoid greenhouse gas emissions.

If one were to use green energy generated by, for example, a wind farm via an electricity grid to power a local desalination plant over a battery system, this would require the following four steps:

1- Converting alternating current (AC) from the windmill alternator to direct current (DC);

2- Converting direct current (DC) to stabilized alternating voltage (AC) on an electricity grid;

3- Converting the stabilized AC voltage to DC voltage (DC) for a local battery;

4- Converting the local battery DC voltage (DC) to a stable AC voltage to power a local desalination plant.

Each of the four steps involves energy loss, making the desalination process less energy efficient.

By generating the green energy on site with a local windmill, for example, the above-mentioned steps 2 and 3 in the conversion of the electricity are unnecessary, so that the number of steps with energy loss is reduced from four to two (steps 1 and 4).

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A problem that arises when generating green energy locally is that it is very subject to fluctuations. A windmill or wind turbine provides more, less or no electricity depending on whether there is a lot, little or no wind. A photovoltaic cell provides power depending on whether there is much or little sunlight, and does not provide any power at night. Hydraulic turbines that use the flow in a river or the tidal currents provide energy that depends on the flow velocity or the tides and are also subject to fluctuations.

This fluctuating energy supply renders the locally generated green energy unsuitable for driving a reverse osmosis desalination plant, because the latter requires a stable energy source. If the energy supply is interrupted, the installation can be damaged by the sudden termination of the desalination process.

The delicate membranes between the pressurized salinated water and the product water that is forced through the membrane can be disabled by sudden pressure drop. In the absence of pressure, transport through the membrane will reverse and allow pure water to pass through to the saline water under the influence of the ordinary osmotic pressure with undesirable consequences on the membranes.

An additional problem is that a locally installed desalination plant is not mobile, while the need for drinking water or irrigation water does and does not arise.

B E2016 / 5766 can be time dependent. The need for irrigation water may depend on the season and may be lower in the rainy season, while the need for drinking water may be higher in coastal areas during a dry season, so that the local desalination plant should be easily movable in such cases.

The present invention aims to overcome the aforementioned and other disadvantages by providing a device for desalinating water by means of green energy, which drives a reverse osmosis desalination installation that converts salt or brackish water into product water, and in which this facility has its own local green energy production and is managed autonomously by a central control unit that adjusts the production of product water to the local needs and expectations and to the fluctuating and expected local green energy production.

Preferably, the means for locally generating green energy comprise windmills, wind turbines, photovoltaic solar cells or hydraulic turbines.

An advantage of these resources for the local generation of green energy is that they make the mobile device autonomous and therefore no longer dependent on access to an electricity grid.

An advantage of such a device is that it only uses green energy that it generates itself and therefore does not produce greenhouse gases.

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Another advantage is that this facility works more efficiently with local green energy production than with green energy obtained from an electricity grid.

In a preferred embodiment, the water desalination device together with the means for locally generating green energy is built on a mobile platform that can be moved over land or over water.

An advantage of the need for this mobile device is that it can be moved to the places that have the most according to the location, but also according to the season and without requiring access to a public electricity grid.

Preferably, the mobile device is built on a floating platform, so that the platform can be moved over water to coastal areas or over rivers, where there is a need for product water. The floating platform can be towed or have an autonomous propulsion.

Preferably, such a floating platform comprises two main pontoons which are connected by three detachable connecting pontoons, which can be easily detached from each other and can be moved along the coast or along navigable waterways according to the needs of product water.

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Preferably, the connected pontoons form a stable platform, each main pontoon having a windmill for the production of green energy, and a pumping installation for pumping up salt or brackish water to a desalination installation.

These windmills can be hinged straightened by means of an electric windlass or a hydraulic jack present on the mobile device without requiring a crane, because the windmills are limited in size, with a hub protruding for example 30 meters above the platform and with which a limited electrical power (eg 100 kW) can be generated. Such windmills can be set up or lowered without a crane, for example in stormy weather.

An advantage of such windmills is that they allow local green electricity to be generated, from average wind speeds of 5.5 m / s.

Another advantage is that these windmills do not require a mechanical transmission alternating current rectifier, but rather generate an integrated direct to storage batteries on the mobile device via as direct room variable variable

An additional advantage of these windmills is that they allow the production of sufficient energy to make the floating platform self-sufficient in energy, so that a connection to an electricity grid or a diesel engine for energy production is not required.

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Such a windmill generates an unstable alternating current (AC) according to the wind strength, which is converted to direct current (DC) and stored in storage batteries, after which power from the batteries is converted to alternating current (AC) to power the pumps for irrigation and the reverse osmosis desalination plant.

Preferably, the central control unit controls the energy management by means of a central driver on the device, the central control unit being connected to the energy source, in this case the windmill (s), to the electrical storage system, in this case the batteries, to the desalination installation, in this case the reverse osmosis equipment, with the storage tanks for product water, and with the irrigation system, in this case the pumps that distribute the irrigation water among the plots to be irrigated on land.

The central controller of the central control unit analyzes the incoming data from all parts to which the control unit is connected and allocates a sufficient amount of energy from the batteries to the desalination plant in the form of a safe, stable power supply, but also to the electronic equipment of the establishment.

The central driver of the central control unit stops the desalination system in a controlled manner in a timely manner if insufficient green energy is produced

B E2016 / 5766 will continue to power the reverse osmosis system.

The central control unit's central driver uses an autonomous and self-learning weather forecast module, based on local wind patterns and on its own wind measurements, as well as other meteorological parameters such as air pressure, precipitation and humidity, enabling accurate and precise local wind forecast and the expected green energy production can be predicted at any time.

In addition, the central controller of the central control unit uses an irrigation analysis module to predict the desired amount of irrigation water, based on local precipitation statistics and other data such as soil type, local water regimes and irrigation techniques used, allowing the central driver optimizes and coordinates the use efficiency of the generated energy and the potential of the desalination plants at any time on the basis of the meteorological conditions and expectations, the condition and characteristics of the windmills, and of the available stock and the expected demand for product water.

In addition, the central driver of the central control unit ensures at all times a safe margin of available electrical energy for kick-starting the windmills after standstill and for controlled reduction of the activity of the desalination plants

B E2016 / 5766 if insufficient energy production is envisaged,

Preferably the floating platform consists of two floating main pontoons which are next to each other head to tail and which are connected by means of three detachable connecting pontoons to form a stable platform and each of which is provided with a windmill and a pumping installation for pumping up from salt or brackish water to your own desalination plant.

An advantage of such coupled main pontoons is that they offer a higher stability to the windmills, so that they can better maintain their vertical position. The wind exerts a force on the blades and the hub of the windmill, which is perpendicular to the windmill mast and can unbalance and tilt it.

On land, this force is neutralized because the base of the mill mast is mounted in a heavy base and also because this force is neutralized by shrinking or stretching the mast itself. The base on a floating pontoon is mobile and the force on the windmill can tilt the floating pontoon. In addition, the center of gravity of the reel mast will become unbalanced, so that the mast can tilt even more.

To avoid that effect, the main pontoons were connected to each other by smaller connecting pontoons, so that one main pontoon is much more difficult to tilt because then

B E2016 / 5766 second main pontoon should be lifted out of the water or pushed under water. The length of the connecting smaller pontoons is chosen in function of the characteristics of the windmills and the associated forces, so that the floating platform is hydrodynamically able to absorb the response to the tilting of a windmill and to keep it stable within the tolerances. from the windmill.

Each desalination installation consists of at least one filter installation followed by one or two reverse osmosis penalties, whereby the number of activated penalties, if there are several, can be dynamically controlled by the central control unit in function of the available energy and the desired amount of product water .

With the insight to better demonstrate the features of the invention, hereinafter, as an example without any limitation, a preferred embodiment of a mobile device for desalinating water by means of green energy according to the invention is described, with reference to the accompanying drawings, in which:

figure 1 shows schematically and in perspective a device for desalinating water according to the invention;

figure 2 schematically represents the data flows to and from the central control unit of the device; figure 3 represents a side view of figure 1 along the shortest side of both main pontoons;

B E2016 / 5766 figure 4 shows figure 3 but now along the longest side of both main pontoons;

figure 5 represents a top view of figure 1 with desalination plants according to the invention; figure 6 schematically represents a desalination plant with reverse osmosis;

Figure 1 shows in perspective a mobile device for desalinating water 1 by means of green energy according to the invention, consisting of two main pontoons 2, 3 which are next to each other head to tail, and which are provided by means of three detachable connecting pontoons 4, 5, 6 are connected together to form a stable platform, each of which is provided with a windmill 7, 8 and with a pumping installation 9, 10 for pumping up salt or brackish water 11 to a desalination installation 12, 13 for reverse osmosis, which delivers product water to a storage tank 14, 15 from which the product water in this case is fed by an irrigation pump 16 to an irrigation line 17, all this under the control of a central control unit 18. The pontoons float in a river, from where saline water is pumped up to desalination plants 12, 13 on board the mobile device, to irrigate plantations on land 19 with product water.

Figure 2 schematically shows the data flows 20 to and from the central control unit 18, the central control unit 18 being connected to the local production of green energy 21, in this case to the windmills 7, 8; with the storage system of electric

B E2016 / 5766 energy 22, in this case the storage batteries 23 with their control unit 24; with the production system 25 of product water, in this case a reverse osmosis desalination plant 26 with its supply of saline water 27 and discharge of product water 28 and of brine 29; with the product water storage system 28, in this case the product water storage tanks 28; with the irrigation system 32, in this case the irrigation pumps and distribution means 33; with an HMI interface 34 to provide access to the central control unit 18 by display and keypad; and with a meteorological module 35, in this case a weather predictor.

The central control unit of the central control unit 18 communicates with the local energy production system 21 via an energy production control unit 36; with the electrical energy storage system 22 via a battery status interface 37; with the production system 25 of product water 28 via a product water production control unit 38; with the product water storage system 30 through a storage tank status interface 39; and with the irrigation system 32 via an irrigation analysis module 40.

Fig. 3 shows a side view along the shortest side of a mobile device for desalinating water 1 by means of green energy according to the invention, consisting of two main pontoons 2, 3 which are next to each other head to tail and each provided with a desalination installation 12, 13, and which are connected by means of three connecting pontoons 4, 5, 6, which can be detached, forming a stable

BE2016 / 5766 platform. In the hold of each main pontoon 2, 3 there are two storage tanks 41 for product water, each of which is divided into four compartments 42 and is provided with a double bottom 43.

In figure 4 the same device of figure 3 is shown in side view, but now along the longest side, whereby the mutual distance between the windmills 7, 8 is clearly visible. The central control unit 18 is located on one main pontoon 2 on which centrally also the irrigation pumps and distribution means 33 are located for pumping irrigation water on land.

Figure 5 shows a top view of a mobile device for desalinating water 1 according to the invention, with two main pontoons 2, 3, each with a desalination plant 12, 13 in which at least one or up to four reverse osmosis penalties are placed. Both desalination plants 12, 13 receive saline river water along the river water inlet 44 at one end of the main pontoons 2, 3 which is fed through the feed lines 45 to the desalination plants 12, 13 which, after reverse osmosis purification, to product water 28 drain residual brine through the drain lines 46 to the brine drain 47 located at the other end of the main pontoons 2, 3 downstream with the flow of the river.

Figure 6 schematically shows the internal structure of one reverse osmosis desalination plant 12 with its supply of brine water 27 and discharge of product water 28 and

B E2016 / 5766 of brine 29, wherein a first pump 48 supplies the saline water to a filter installation 49 for pretreatment, after which the filtered saline water passes through at least one to four pumps 51, 52, 53 via a system of four shut-off valves 54, 55, 56, 57 is pumped to at least one to four reverse osmosis streets 58, 59, 60, 61 and the purified product water 28 is further advanced through at least one to four shut-off valves 62, 63, 64, 65 to the product water outlet 28. The optional reverse osmosis streets 59, 60, 61 are shown in dotted lines.

The residual brine 29 in the reverse osmosis lines 58, 59, 60, 61 can be pumped out per osmosis line to the brine drain 29. When one osmosis line is set to inactive, it is rinsed with purified product water 28, to protect the membrane from deterioration .

The operation of the mobile device 1 for desalinating water by means of green energy is autonomous and operates as follows.

The mobile device 1 for desalinating water by means of green energy is dragged with lowered and disassembled windmills 7, 8 to a location where an acute need for product water arises. The main pontoons and the connecting pontoons are disconnected from each other and are dragged separately.

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Once at the desired location, the pontoons 2, 3 are fastened together by the connecting pontoons 4, 5, 6, the draft of which can be regulated with ballast water, so that the fixings provided for this purpose with the main pontoons 2, 3 are at the correct height above the water level and can be attached to the main pontoons without requiring the use of a tap.

This creates a stable floating platform 1, and the necessary electrical, data and fluid connections between the two main pontoons 2, 3 can now be connected.

The platform 1 is then moored against a bank at the level of the land to be irrigated 19.

Now, the windmills 7, 8 are straightened by drawing them up with an electric windlass or hydraulic jack, which draws its energy from the reserve stored in the storage batteries 23 of the device. This reserve is also sufficient to start the windmills 7, 8, once they have been erected and deployed, with a kick-start, after which they are driven at a height of 30 m by the prevailing wind.

Once the windmills 7, 8 are in operation, they can continuously replenish the energy reserves in the batteries 23, and they are further controlled by the central control unit 18, which continuously receives information about the windmills 7, 8 via the control unit 36 of the energy production unit. unit 21 being the windmills 7, 8.

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The central control unit 18 also continuously receives information from the energy storage system 22 with storage batteries 23, with their own control unit 24, which forwards data via the battery status interface 37 on the amount of energy available in the batteries and the rate at which they are used up or unloaded. The alternating current (AC) generated by the windmills 7, 8 is converted via a converter 41 to direct current (DC) with which the batteries 23 are charged.

The central control unit 18 also continuously receives information from the product system 25 of product water 28 through a product control unit 38 for product water 28 which transmits data on the energy consumption of the reverse osmosis lines 26, the number of Penalties in use and the flow rate and flow rate. quality of the product water 28 that is produced, and of the brine water 29 that is discharged.

In addition, the central control unit 18 also continuously receives information from the storage system 30 for product water 28 through a storage tank status interface 39 which forwards data on the supply of product water 28 contained in the storage tanks 31 and on the flow rate of the supply and discharge of product water 28.

Finally, the central control unit 18 continuously receives information from the irrigation system 32 via an irrigation analysis module 40 which forwards data about the irrigation pumps 16 and the distribution means 33 for product water.

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The central control unit 18 also continuously receives data from the weather forecast module 35, which, based on the local wind patterns and on its own wind measurements, and on meteorological parameters such as air pressure, precipitation and humidity, allows for accurate and precise local wind forecast.

The central control unit of the central control unit 18 optimizes at all times the utilization efficiency of the generated energy and the potential of the desalination plant 12, 13 and this on the basis of the meteorological conditions and expectations, the condition and characteristics of the windmills 7, 8 and the storage batteries 23, whereby the centers driver adjusts the production of product water to the generation of green energy and to the required amount of product water for irrigation, for example.

The central driver of the central control unit 18 also ensures at all times that a safe margin of available energy remains available for kickstarting the windmills 7, 8 after standstill, and for the controlled reduction of the activity of the desalination plant 12 , 13 if insufficient green energy production is envisaged.

After a period of inactivity of the windmills 7, 8, for example during windlessness or when windmills are lowered during a typhoon, the windmills must be restarted by a kick-start with electric energy,

B E2016 / 5766, after which the rotation of the blades can be ensured by the wind,

The central driver of the central control unit 18 ensures that the mobile device for desalinating water 1 by means of locally generated green energy, can function autonomously at all times, and does not require an external energy source, such as, for example, a diesel engine for generating power , with unwanted greenhouse gas production.

The central control unit of the central control unit 18 also ensures that desalination plants 12, 13 are phased out in a controlled manner, if too low an energy production is expected to be kept in operation.

Each desalination plant includes one to four reverse osmosis streets, where the brine water is forced through a membrane under pressure to form purified product water 28. Each of these one or more streets can be stopped individually by closing a valve 54, 55, 56, 57, stopping the supply of saline water to the reverse osmosis street.

Then all pipes of the relevant street are rinsed with purified product water 28, to remove all impurities, and the rinsing water is drained through the brine drain 29, so that the membrane is not damaged by stopping the purification process and can be reused later .

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The driver can gradually reduce or rebuild the capacity of the treatment plant 12 by disabling or enabling one street 58 or more streets 59, 60, 61 if more than one street is available for reverse osmosis and this depending on the expected available green energy and the expected need for product water. This control is necessary to protect the reverse osmosis treatment plant from damage as a result of the fluctuations in green energy production.

The present invention is by no means limited to the exemplary embodiment shown in the figures, but an apparatus for desalinating water by means of a local green energy production according to the invention can be realized in all kinds of shapes and sizes without the scope of the invention.

For example, the device cannot only be in a fixed location

established, but also on one mobile platform turn into furnished, Which movable is over land or about waterways. That's how it is also possibly the green energy through windmills but by wind turbines, photovoltaic solar panels , or to generate hydraulic turbines.

In any case, the water desalination device must be provided with a central control unit 18, which

B E2016 / 5766 can link the fluctuating green electricity production to the need for a stable AC power source for driving the pumps and the desalination plant itself and to the need for a prior gradual reduction of the desalination in the reverse osmosis plant, if the desalination plant must be shut down for lack of energy or for lack of desalinated water in the form of potable water or agricultural irrigation water.

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Claims (16)

Conclusions. 1. - Green energy desalination plant (1), which drives a reverse osmosis desalination plant (12, 13) that converts salt or brackish water (44) into product water (28), characterized in that this facility has its own local green energy production and is managed autonomously by a central control unit (18) that adjusts the production of product water to the local needs and expectations and to the fluctuating and expected local green energy production. Device for desalinating water (1) according to claim 1, characterized in that it, together with the means for locally generating green energy, is built on a mobile platform which can be moved over land or over water. Device for desalinating water (1) according to claim 1 or 2, characterized in that the means for locally generating green energy can comprise windmills (7, 8), wind turbines, photovoltaic solar cells or hydraulic turbines. Device for desalinating water (1) according to claim 2, characterized in that the mobile device is built on a floating platform, so that the platform can be moved over water to coastal areas or over rivers, where there is a need for product water , B E2016 / 5766 where the floating platform is towed or has an autonomous propulsion. Mobile device according to claim 4, characterized in that the floating platform comprises two main pontoons (2, 3) which lie next to each other head to tail, and which are connected by means of three detachable connecting pontoons (4, 5, 6) are connected together to form a stable platform, and each main pontoon (2, 3) is provided with a windmill (7, 8) for green energy production and with a pumping installation (9, 10) for pumping from salt or brackish water (41) to a desalination plant (12, 13). 6.- Mobile device characterized in that the 4, thereby releasable according to claim length of the connecting pontoons (4, 5, 6) is chosen in function of the size and characteristics of the windmills (7, 8) and the associated forces on the masts of the windmills, so that it floats platform is hydrodynamically capable of absorbing the response to a windmill tilt (7, 8) and keeping it stable within the windmill tolerances. Mobile device according to claim 5, characterized in that the windmills (7, 8) can be hinged straightened or lowered by means of an electric windlass or a hydraulic jack on the mobile device without requiring a crane. B E2016 / 5766 Mobile device according to claim 5, characterized in that each windmill (7, 8) generates an unstable alternating current (AC) according to the wind strength, which is converted to direct current (DC) and stored in storage batteries (23), after which power from the batteries are converted to alternating current (AC) to power the irrigation pumps (33) and the reverse osmosis desalination system (12, 13). desalination of water is characterized by the fact that one regulates according to central central on the by means of energy management Device for claim 1, thereby control unit (18) driver the device (1), wherein the central control unit (18) is connected to the energy source (21), in this case the windmills (7, 8), with the electric storage system (22), in this case the batteries (23), with the desalination plant (25), in this case the reverse osmosis equipment (26), with the storage tanks (31) for desalinated water, and with the irrigat! system (32), in this case the pumps (33) that distribute the product water (28) among the fields to be irrigated on land (19). Water desalination device according to claim 9, driver incoming of the data characterized in that the central central control unit (18) analyzes the all the parts to which the control unit is connected and allocates a sufficient amount of energy from the batteries to the desalination installations (12, 13) in the form of a safe stable power supply but also to the B E2016 / 5766 electronic equipment of the establishment and desalination stopped in a controlled manner in a timely manner, if insufficient green energy production is expected to continue to supply the reverse osmosis system {58, 59, 60, 61). 5 float. 11. “Device for desalinating water according to claim 9, characterized in that the central driver of the central control unit (18) uses 10 uses an autonomous and self-learning weather forecast module (35), based on local wind patterns and on its own wind measurements, as well as on other meteorological parameters such as atmospheric pressure, precipitation and humidity, enabling accurate and precise local 15 wind prediction is possible and the expected green energy production is predicted at any time. 12. - Device for desalinating water according to claim 9, characterized in that it is central 20 driver of the central control unit (18) uses an irrigation analysis module (40), to predict the desired amount of product water (28), based on local precipitation statistics and other data such as soil type, local water regimes, and 25 irrigation techniques used, allowing the central driver to optimize and match the utilization efficiency of the generated green energy and the potential of the desalination plants at any time based on meteorological conditions and expectations 30 and the condition and characteristics of the windmills. B E2016 / 5766 Water desalination device according to the central control unit (18) of claim 9, characterized central control unit communicating with the local energy production system (21) via an energy production control unit (36); with the electrical energy storage system (22) via a battery status interface (37); with the production system (25) of product water (28) via a product water production control unit (38); with the product water storage system (30) via a storage tank status interface (39); and with the irrigation system (32) via an irrigation analysis module (40). Water desalination device according to claim 9, characterized in that the central control unit of the central control unit (18) coordinates the green energy production and the production of product water (28) at any time. Device for desalinating water according to claim 9, characterized in that the central driver of the central control unit (18) ensures at all times a safe margin of available energy for kick-starting the windmills (7, 8) , and for the controlled reduction of the activity of the desalination plants (12, 13) if insufficient green energy production is envisaged. Device according to claim 9, characterized in that each desalination plant (12, 13) consists of at least one filter plant (49) followed by one or two inverted B E2016 / 5766 Osmosis Streets (58, 59, 60, 61) exists, with the number of enabled Osmosis Streets being dynamically controlled by the central driver of the central control unit (18) according to the available green energy and the Desired amount of product water (28). B E2016 / 5766 B E2016 / 5766 BE2016 / 5766 T T B E2016 / 5766/7 B E2016 / 5766 Device for desalinating water using locally produced green energy. 5 Device for desalinating water (1) by means of green energy, which drives a reverse osmosis desalination plant (12, 13} that converts salt or brackish water (44) into product water (28), characterized in that this device has a own local green 10 has energy production and is managed autonomously by a central control unit (18) that adjusts the production of product water to the local needs and expectations and to the fluctuating and expected local green energy production.