CN106045114B

CN106045114B - Fresh water reserve station based on reverse osmosis seawater desalination technology

Info

Publication number: CN106045114B
Application number: CN201610538264.1A
Authority: CN
Inventors: 贾虎; 原长洲; 侯林瑞
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2016-07-08
Filing date: 2016-07-08
Publication date: 2020-05-19
Anticipated expiration: 2036-07-08
Also published as: CN106045114A

Abstract

The invention discloses a fresh water storage station based on a reverse osmosis seawater desalination technology, and belongs to the field of seawater desalination. The seawater desalination device comprises a seawater desalination mechanism, a water storage transfer cylinder and a large water sump, wherein the seawater desalination mechanism positioned in the sea desalinates seawater and then conveys the seawater to the large water sump on the ground through the water storage transfer cylinder; the seawater desalination mechanism is formed by arranging at least 3 seawater desalination devices in parallel, and the seawater desalination devices are connected with each other through a traction rope; the seawater desalination device is internally provided with a reverse osmosis mechanism which is arranged below 5 meters of the water surface and is connected with a water storage tank on the water surface through a return pipe; wind energy, solar energy and water power can be utilized for generating electricity for providing electric energy for the reserve station. The invention desalts the seawater through the reverse osmosis, has high desalination efficiency, automatically converts various energy sources into electric energy, can be directly and independently used on the sea surface, and is suitable for being developed and utilized on the island.

Description

Fresh water reserve station based on reverse osmosis seawater desalination technology

Technical Field

The invention relates to the technical field of seawater desalination, in particular to a fresh water storage station based on reverse osmosis seawater desalination technology.

Background

Water is a source of life, is the basis of economic and social development, and the demand and quality of fresh water resources are continuously improved along with the economic development and the social progress. China has coastlines which are as long as 1.8 kilometers, and the number of islands with the area of more than 500 square meters is 6961, so that the coastlines are not only bases for marine fishing, offshore culture and marine resource protection, but also army bases and frontier sentries which have the strategic significance of national defense. Most of the sea islands have deficient fresh water resources, and the water quality often does not meet the sanitary standard; some islands have no fresh water at all, and fresh water is supplied mainly by supply ships, so that the cost is high and the islands are easily influenced by weather conditions. Some very remote islands still have the circumstances that the electric power is not enough and can't be supplied, utilize traditional fossil fuel (coal, oil) to solve sea water desalination energy problem, this not only destroys the ecosystem of island easily, and operation and maintenance cost are higher moreover.

As an important offshore strategic base, south China's sea needs to continuously perfect various capital construction works, but because of the shortage of fresh water resources, water resources need to be transported from inland to meet the water demand on the island. As described above, if seawater desalination is performed by using other energy sources, ecological balance on the island is easily damaged, and various resources still need to be transported from inland, and seawater desalination cannot be performed by using local materials, which is a problem commonly existing in various islands and reefs.

Chinese patent application No.: 201010198014.0, discloses a wind, light and sea current clean energy sea water desalination device, which comprises a power generation device, a storage battery and a sea water desalination device which are connected in sequence, wherein the power generation device comprises a wind generating set, a solar cell panel and a sea current power generation device; the seawater desalination device comprises an extraction pump, a pre-filter, a cartridge filter, a high-pressure pump, a reverse osmosis membrane component, a water quality detection meter and a fresh water tank. The sea tide current generating set comprises a swinging energy collector, a floating ball connecting rod, a transmission gear box, a direct current generator and an anchor chain; the swing energy collector is connected with a transmission gear box through a floating ball connecting rod, and the transmission gear box is connected with a direct current generator and is fixed on the seabed through an anchor chain. The invention has large dependence on land and can not be directly arranged on the sea for independent use.

Chinese patent No.: 201510736223.9, discloses a vertical ball type deep sea small and medium-sized seawater desalter, which comprises: the 9 pre-filtering balls arranged in a square matrix are connected with a pressurizing cylinder through a hinge and a pressurizing lever, and the upper part of the structure mainly comprises a water storage tank, a pressurizing pump, a sterilizer and other important parts. The integral structure is arranged at a position thirty meters deep below the sea surface, under the action of the seawater pressure at the depth, the seawater enters the pre-filtering ball, the pretreated seawater enters the pressurizing cylinder, the pre-filtering ball is pushed by sea waves to fluctuate at the same time, the pressurizing cylinder is driven to swing and pressurize, the pressurized seawater enters the water storage tank, then enters the reverse osmosis membrane filter through the pressurizing pump, reverse osmosis desalination is implemented, and finally fresh water is output after being sterilized by the sterilizer. The application only sets up the sea water desalination device in the seabed, and does not have the jar that stores up water, and it is comparatively loaded down with trivial details on the surface of water is carried to fresh water, is not convenient for use.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defect that a seawater desalination device in the prior art cannot be independently used on the sea surface, and provides a fresh water storage station based on a reverse osmosis seawater desalination technology.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a fresh water storage station based on reverse osmosis seawater desalination technology, which comprises a seawater desalination mechanism, a water storage transfer cylinder and a large water sump, wherein the seawater desalination mechanism positioned in the sea is used for desalinating seawater and then conveying the desalinated seawater into the large water sump on the ground through the water storage transfer cylinder; the seawater desalination mechanism is formed by arranging at least 3 seawater desalination devices in parallel, and the seawater desalination devices are connected with each other through a traction rope.

As a further improvement of the invention, a water inlet of the water storage transfer cylinder receives the desalinated seawater of each seawater desalination device through a confluence main pipe, a water level detector is arranged in the water storage transfer cylinder, and when a water full signal is detected, fresh water in the water storage transfer cylinder is discharged into a large-scale water sump through a high-pressure pump.

As a further improvement of the invention, the seawater desalination device comprises a water storage tank, a reverse osmosis mechanism, a drainage mechanism and an electric power system, wherein the reverse osmosis mechanism is formed by wrapping at least 3 reverse osmosis balls by a filter screen, is arranged below the water surface by 5 meters and is connected with the water storage tank on the water surface by a return pipe; the drainage mechanism is used for discharging the desalted water in the water storage tank, and the electric power system is used for providing electric energy for the drainage mechanism.

As a further improvement of the invention, the side wall of the water storage tank is symmetrically provided with two ear rings, and a traction rope is inserted into the ear rings to limit the position of the water storage tank; preferably, the upper surface of the water storage tank is of a plane structure, and the diameter of the over-center point of the water storage tank is larger than the height of the over-center point.

As a further improvement of the invention, the reverse osmosis mechanism comprises a return pipe, a filter screen, a support body flow pipe and reverse osmosis balls, wherein the return pipe is communicated with the support body flow pipe through a branch return pipe, at least three reverse osmosis balls are connected to the support body flow pipe, the reverse osmosis balls are covered by the filter screen, and fresh water filtered by the reverse osmosis balls is conveyed to the water storage tank through the return pipe.

As a further improvement of the invention, an additional reverse osmosis ball is arranged below the reverse osmosis ball connected with the flow pipe of the bracket body, and two longitudinally adjacent reverse osmosis balls are connected through a pipeline connector.

As a further improvement of the invention, the reverse osmosis ball comprises a filter bag, an activated carbon layer, a reverse osmosis membrane and a spherical framework from outside to inside, the spherical framework surrounds a central cavity, and external seawater enters the central cavity through the reverse osmosis.

As a further improvement of the invention, the drainage mechanism comprises a water suction pump, a controller, an upper water level detector and a lower water level detector, wherein the upper water level detector and the lower water level detector are arranged at different heights of the water storage tank to detect water level information in the water storage tank and transmit detection signals to the controller, and the controller controls the action of the water suction pump to suck fresh water out.

As a further improvement of the invention, the power system comprises a photovoltaic power generation module, a wind driven generator and/or a water flow generator which are arranged on the water storage tank, the photovoltaic power generation module and the wind driven generator are fixed above the water storage tank, the water flow generator is arranged at the bottom of the water storage tank, generated power is stored in an electric storage module, and the electric storage module is electrically connected with a storage battery arranged on the large water sump.

As a further improvement of the invention, the photovoltaic power generation module comprises a photovoltaic module, a rotating base, a telescopic rod and a support rod, wherein the rotating base is arranged on the upper surface of the water storage tank, the photovoltaic module is supported above the rotating base through the telescopic rod and the support rod, and the telescopic rod is used for adjusting the inclination angle of the photovoltaic module.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the fresh water storage station, the sea surface is provided with the seawater desalination mechanism, so that seawater can be directly desalinated, desalinated water is stored in the large water sump on the land, water can be continuously supplied, and the desalination device does not occupy land space, so that resources are reasonably utilized; in addition, the seawater desalination devices are connected with each other through the traction ropes, and the single seawater desalination device can freely fluctuate, so that the influence of waves on the whole storage station is reduced;

(2) according to the seawater desalination device arranged on the fresh water storage station, the water storage tank is arranged on the sea surface, the reverse osmosis mechanism is arranged in the sea water, the structure is combined up and down, the reverse osmosis mechanism has certain gravity, the stability of the water storage tank is ensured, the structural design is reasonable, the seawater desalination device can generate electricity automatically to provide drainage power, no pollution is generated, and the seawater desalination device is energy-saving and environment-friendly;

(3) according to the fresh water storage station, the reverse osmosis mechanism comprises the filter screen and the reverse osmosis ball, the reverse osmosis ball comprises the filter bag, the activated carbon layer, the reverse osmosis membrane and the spherical framework from outside to inside, the filter screen can filter aquatic weeds or other aquatic organisms in seawater and prevent the aquatic organisms from attaching to the outside of the reverse osmosis ball, the filter bag is used for filtering small organisms, the activated carbon layer is used for filtering microorganisms, the reverse osmosis membrane is used for filtering salt molecules, and the spherical framework is used for providing supporting strength; the larger the depth of the reverse osmosis mechanism is, the larger the pressure is, and the higher the filtering efficiency is;

(4) according to the fresh water storage station, the power system comprises the power storage module, the photovoltaic power generation module, the wind driven generator and/or the water flow generator, the power storage module is used for storing electric quantity, the photovoltaic power generation module is used for generating power by utilizing light energy, the wind driven generator can be used for generating power by utilizing sea surface wind power, and the water flow generator is used for generating power by utilizing water flow.

Drawings

FIG. 1 is a schematic structural diagram of a fresh water reserve station based on reverse osmosis seawater desalination technology according to the present invention;

FIG. 2 is a schematic structural diagram of a water storage tank, a drainage mechanism and an electric power system in the invention;

FIG. 3 is a schematic structural view of a photovoltaic power generation module according to the present invention;

FIG. 4 is a schematic view showing the internal structure of the reverse osmosis mechanism according to the present invention;

fig. 5 is a schematic view of the internal structure of the reverse osmosis ball of the present invention.

The reference numerals in the schematic drawings illustrate: 101. a water storage tank; 102. an ear ring; 103. connecting a base; 104. a gas permeable pipe; 105. a hauling rope; 201. a water current generator; 202. a wind power generator; 203. an electric storage module; 301. a photovoltaic module; 302. rotating the base; 303. a telescopic rod; 304. a strut; 401. a water pumping pipe; 402. a water pump; 403. a drain pipe; 404. a controller; 405. an upper water level detector; 406. a lower water level detector; 501. a return pipe; 502. a branch return pipe; 503. a filter screen; 504. a stent body flow tube; 505. a pipe joint; 506. a reverse osmosis ball; 5061. a filter bag; 5062. an activated carbon layer; 5063. a reverse osmosis membrane; 5064. a spherical skeleton; 5065. a central lumen; 601. a manifold; 602. rotating the cylinder in the water storage; 603. a transfer cylinder earring; 604. a high pressure pump; 701. a large-scale sump; 702. a storage battery; 703. an alarm; 704. a faucet.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

With reference to fig. 1, the fresh water reserve station based on the reverse osmosis seawater desalination technology of the present embodiment includes a seawater desalination mechanism, a water storage transfer cylinder 602, and a large-scale water sump 701, wherein the seawater desalination mechanism located in the sea desalts seawater and then transfers the desalinated seawater into the large-scale water sump 701 on the ground through the water storage transfer cylinder 602; wherein, the seawater desalination mechanism is formed by arranging at least 3 seawater desalination devices in parallel, and the seawater desalination devices are mutually connected through a hauling rope 105.

The seawater desalination mechanism is directly arranged in the sea, can directly desalinate seawater, does not occupy land resources, and is used for storing fresh water by arranging the large-scale water sump 701 on land or a shoal. The water inlet of the water storage transfer cylinder 602 receives the desalinated seawater of each seawater desalination device through the confluence main pipe 601, the water storage transfer cylinder 602 can be arranged by being attached to a seawater desalination mechanism and also connected to the seawater desalination device through a traction rope, a water level detector is arranged in the water storage transfer cylinder 602, and when a water full signal is detected, fresh water in the water storage transfer cylinder 602 is discharged into the large-scale water sump 701 through the high-pressure pump 604. Each seawater desalination device is provided with a water suction pump for discharging desalinated seawater, and in general arrangement, the water suction pump in the seawater desalination device may be directly used for discharging fresh water into the large-scale sump 701, but when seawater is desalinated, the seawater desalination device may be far away from the shore, so that sufficient water pressure is difficult to achieve in direct drainage, and smooth drainage can be further ensured through the high-pressure pump 604 on the water storage rotary cylinder 602. The large water sump 701 is also provided with a water tap 704 and an alarm 703, when the water level on the large water sump 701 reaches a certain height, the alarm 703 begins to whistle to alarm to remind that the fresh water level in the large water sump 701 is enough, and the fresh water can be discharged through the water tap 704.

The seawater desalination device in the embodiment mainly comprises a water storage tank 101, a reverse osmosis mechanism, a drainage mechanism, an electric power system and the like, wherein the reverse osmosis mechanism is formed by wrapping at least 3 reverse osmosis balls 506 by a filter screen 503, the reverse osmosis mechanism is arranged below 10 meters above the water surface and is connected with the water storage tank 101 on the water surface through a return pipe 501, a connecting base 103 is arranged at the center of the bottom of the water storage tank 101, and the upper end of the return pipe 501 is fixed on the connecting base 103.

Referring to fig. 4, the reverse osmosis mechanism includes a return pipe 501, a filter screen 503, a bracket body flow pipe 504 and a reverse osmosis ball 506, the return pipe 501 is communicated with the bracket body flow pipe 504 through a branch return pipe 502, at least three reverse osmosis balls 506 are connected to the bracket body flow pipe 504, the reverse osmosis balls 506 are covered by the filter screen 503, and the fresh water filtered by the reverse osmosis balls 506 is delivered to the water storage tank 101 through the return pipe 501.

In this embodiment, the stent body flow tube 504 is a frame formed by two longitudinal and three transverse pipelines, the return pipe 501 is communicated with the stent body flow tube 504 through three branch return pipes 502, at least three reverse osmosis balls 506 are connected to the stent body flow tube 504, and the reverse osmosis balls 506 are arranged in an array on the pipelines forming the stent body flow tube 504. In order to improve the efficiency of seawater desalination, more reverse osmosis balls 506 are needed, and therefore, additional reverse osmosis balls 506 are arranged below the reverse osmosis balls 506 connected with the support body flow pipe 504, namely a plurality of reverse osmosis balls 506 are arranged along the longitudinal direction, and two longitudinally adjacent reverse osmosis balls 506 are connected through a pipeline connector 505. A support body flow tube 504 may also be provided below the bottommost reverse osmosis sphere 506 for structural stability.

It should be noted that the pipe joint 505 is connected with each reverse osmosis ball 506 through a thread, and a pipe valve is disposed on the pipe joint 505, so that if the reverse osmosis ball 506 is damaged, the pipe joint is convenient to replace, and external seawater cannot flow into the reverse osmosis ball 506.

The reverse osmosis balls 506 arranged in an array form a regular rectangular body, and the reverse osmosis balls 506 are covered by a filter screen 503, wherein the filter screen is a three-dimensional grid which is formed by stainless steel wires with the diameter of 5mm and has the aperture not larger than 1cm, and is used for preventing external aquatic weeds or aquatic organisms from damaging the reverse osmosis balls 506 and influencing the normal use of the reverse osmosis balls. The fresh water filtered by the reverse osmosis ball 506 is delivered to the water storage tank 101 through the return pipe 501. In order to enable the desalinated water to rapidly enter the water storage tank 101, the upper portion of the water storage tank 101 is provided with the vent pipe 104, the vent pipe 104 is composed of a vertical section and an inclined section, the inclined section inclines downwards along the horizontal direction, on one hand, the circulation of gas can be guaranteed, and on the other hand, seawater can be prevented from entering. The ventilation tube 104 can also be designed into an inverted U shape, and has the same ventilation and waterproof functions.

The upper surface of the water storage tank 101 is of a plane structure, the lower part of the water storage tank 101 is of an ellipsoid shape, the diameter of the over-center point of the water storage tank 101 is larger than the height of the over-center point, namely the width of the cross section is larger than the height, and the stability of the center of gravity is ensured. Larger waves are generated on the sea surface, if the water storage tank floats on the sea surface independently, the water storage tank is easy to overturn, and the reverse osmosis mechanism has larger gravity, so that the water storage tank 101 sinks to a certain water level, and the stability of the structure is further ensured.

After the water storage tank 101 is filled with water, the desalted water in the water storage tank 101 is discharged through the water discharge mechanism. The water discharging mechanism is internally provided with a water pump, electric energy required by the water pump is provided by an electric power system, and the electric energy in the electric power system is obtained by self power generation. The power generation device can be photovoltaic power generation, wind power generation, hydroelectric power generation and the like, and is not particularly limited. Two ear rings 102 are symmetrically arranged on the side wall of the water storage tank 101, and a traction rope 105 is inserted into the ear rings 102 to limit the position of the water storage tank 101, so as to prevent the water storage tank from being washed away by water waves. The water storage tank 602 is provided with a transfer tank ear ring 603, and the transfer tank ear ring 603 is also inserted with the traction rope 105 and connected with the water storage tank 101.

Most of sea areas communicated with the outside are wavy, although the reverse osmosis mechanism has certain gravity to prevent a single water storage tank 101 from shaking, if the water storage tanks 101 are in rigid connection, the fluctuation of a plurality of water storage tanks 101 has time difference, the connection device is easy to damage due to impact for a certain time, and when the water storage tanks are connected through a traction rope, the up-and-down fluctuation of the single water storage tank 101 cannot greatly influence the adjacent water storage tank 101, so that the mobility is better, the connecting piece is not easy to damage, and the service life is longer.

The drainage mechanism and the electric power system can be arranged on a plane structure on the water storage tank, and the plane structure is convenient to fix. The water storage tank is arranged on the sea surface, the reverse osmosis mechanism is arranged in the sea water, the structure is combined up and down, the position space is greatly applied, and the sea water can be directly desalinated; in addition, the system is directly arranged in the sea, does not occupy land space, can generate electricity by itself to provide drainage power, reasonably utilizes resources, does not produce pollution, and is energy-saving and environment-friendly; in addition, the reverse osmosis mechanism has certain gravity, so that the stability of the water storage tank is ensured, the structural design is reasonable, and the principle is simple.

Example 2

With reference to fig. 5, the basic structure of a fresh water reserve station based on reverse osmosis seawater desalination technology in this embodiment is the same as that in embodiment 1, except that: the reverse osmosis ball 506 in this embodiment includes a filter bag 5061, an activated carbon layer 5062, a reverse osmosis membrane 5063, and a spherical skeleton 5064 from outside to inside, the spherical skeleton 5064 encloses a central cavity 5065, and external seawater enters the central cavity 5065 through reverse osmosis. The filter bag 5061 is used for filtering small organisms in the sea, and the activated carbon layer 5062 has a strong adsorption effect, forms a small circulation space and is used for filtering microorganisms; reverse osmosis membrane 5063 is used for filtering the salt molecule, and spherical skeleton 5064 is used for providing support intensity, and the array is arranged the rivers hole on spherical skeleton 5064, and this rivers hole size is 0.6 ~ 2mm, and the wall thickness is 5 ~ 10mm, can adopt stainless steel material to make to guarantee intensity. The larger the depth of the seawater filtering module is, the larger the pressure intensity is, the higher the filtering efficiency is, and the seawater filtering module can be placed into seawater with the depth of 100 meters and can be desalinated by depending on the pressure of the seawater.

Example 3

With reference to fig. 2, the basic structure of a fresh water reserve station based on reverse osmosis desalination technology in this embodiment is the same as that in embodiment 2, and the difference is that: the power system in this embodiment includes the photovoltaic power generation module, the wind power generator 202, and the water current generator 201 which are disposed on the water storage tank 101, or the photovoltaic power generation module and the wind power generator 202 or the water current generator 201 may be independently combined to generate power, and in order to ensure sufficient power, the three are disposed in the system at the same time in this embodiment. The photovoltaic power generation module and the wind driven generator 202 are fixed above the water storage tank 101, the photovoltaic power generation module is arranged at the center of the upper surface of the water storage tank 101, the wind driven generator 202 is fixed on the outer edge of the water storage tank 101, and 8 wind turbines are distributed at equal intervals along the circumferential direction of the water storage tank 101 and are easy to receive incoming wind in all directions. The specific number thereof is set as required, and is not particularly limited.

The water flow generators 201 are arranged at the bottom of the water storage tank 101, and are also uniformly distributed with 4 along the circumferential direction of the water storage tank 101. The water flow generator 201 is disposed below the bottom surface of the water storage tank 101, that is, the impeller of the water flow generator 201 is located at a water level lower than the water level of the bottom surface of the water storage tank 101. The water storage tank 101 can obstruct the water flow, and the water flow generator 201 can obtain better water flow impact effect by being arranged at the lower part of the water storage tank, so that the generating efficiency is easy to improve. In addition, in order to prevent the electric wires from being corroded by seawater, the electric wires are all wrapped by the circuit packaging tube.

The electric power generated by the photovoltaic power generation module, the wind power generator 202 and the water flow generator 201 is stored in the electric storage module 203, and the electric energy is supplied to the drainage mechanism through the electric storage module. The power storage water-rotating cylinder 602 is also powered by the electric energy generated by the power storage module.

Example 4

With reference to fig. 3, the basic structure of a fresh water reserve station based on reverse osmosis seawater desalination technology in this embodiment is the same as that in embodiment 3, except that: photovoltaic power generation module includes photovoltaic module 301, rotating base 302, telescopic link 303 and branch 304, rotating base 302 sets up the upper surface at water storage tank 101, photovoltaic module 301 passes through telescopic link 303 and branch 304 supports in rotating base 302 top, two branches 304 set up side by side, telescopic link 303 and two branches 304 composition isosceles triangle structure at the point, and branch 304 and telescopic link 303 upper end all articulate with photovoltaic module 301 bottom surface, the inclination that adjusts photovoltaic module 301 through the length variation of telescopic link 303. The rotating base 302 can rotate relative to the water storage tank 101, and the angle of the rotating base 302 and the height of the telescopic rod 303 are manually set according to the latitude information and the local solar azimuth, so that the large power generation efficiency is suitable for being obtained.

Similarly, the large water sump 701 is also provided with photovoltaic power generation modules with the same structure, and is also provided with a storage battery 702, the power generated by the photovoltaic power generation modules on the large water sump 701 is stored on the storage battery 702, and surplus power generated by each power storage module on the seawater desalination device is also stored in the storage battery 702 and can be used for providing power for land power utilization equipment.

In addition, as a further improvement, a light intensity tracker can also be arranged on the photovoltaic module 301, the telescopic rod 303 and the rotating base 302 are driven by corresponding motors, the light intensity tracker and the motors are both electrically connected with a processor in the rotating base 302, and the processor controls the actions of the telescopic rod 303 and the rotating base 302 according to signals of the received light intensity tracker. The photovoltaic module 301 can be always in a larger power generation state by the arrangement, and the power generation efficiency is greatly improved.

Example 5

The basic structure of a fresh water reserve station based on reverse osmosis seawater desalination technology of this embodiment is the same as that of embodiment 4, and its difference lies in: in this embodiment, the drainage mechanism is used for draining the desalinated water in the water storage tank 101, and the drainage mechanism includes a water pump 402, a controller 404, an upper water level detector 405 and a lower water level detector 406, where the upper water level detector 405 and the lower water level detector 406 are disposed at different heights of the water storage tank 101 to detect water level information in the water storage tank 101. The upper water level detector 405 is arranged at the upper part of the internal cavity of the water storage tank 101, and when a water level signal is detected, the signal is transmitted to the controller 404, the controller 404 controls the water pump 402 to start to discharge water to the outside, and fresh water enters the water storage transfer tank through the confluence main pipe 601. When the water level drops to the position of the lower water level detector 406, the detected water level signal is transmitted to the controller 404, and the controller 404 controls the suction pump 402 to stop discharging water. The water level detector on the water storage transfer cylinder has the same water level detection function as that in the drainage mechanism.

The seawater desalination device is arranged on the sea surface, so that the land space is not occupied, the whole seawater desalination process does not need human interference, and the automation degree is high; because the power of the whole system is generated by self, no pollutant is discharged, the ecological environment in the seawater is not influenced, and the system is environment-friendly and energy-saving.

According to the sea water desalting device, the water storage tank is combined with the reverse osmosis mechanism, the stability of the water storage tank is guaranteed by utilizing the gravity and the water resistance of the reverse osmosis mechanism, even if relatively large wind waves exist, the water storage tank generally only fluctuates along with the waves without shaking left and right, a good stabilizing effect is achieved on relatively calm sea surfaces, and the use requirement of sea water desalting is met.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A fresh water reserve station based on reverse osmosis seawater desalination technology, which is characterized in that: the sea water desalination device comprises a sea water desalination mechanism, an in-water storage rotary cylinder (602) and a large water sump (701), wherein the sea water desalination mechanism positioned in the sea is used for desalinating sea water and then conveying the desalinated sea water into the large water sump (701) on the ground through the in-water storage rotary cylinder (602); wherein, the seawater desalination mechanism is formed by arranging at least 3 seawater desalination devices in parallel, and the seawater desalination devices are mutually connected through a traction rope (105); the seawater desalination device comprises a water storage tank (101), a reverse osmosis mechanism, a drainage mechanism and an electric power system, wherein the reverse osmosis mechanism is formed by wrapping at least 3 reverse osmosis balls (506) by a filter screen (503), is arranged below 5 meters above the water surface and is connected with the water storage tank (101) on the water surface through a return pipe (501); the drainage mechanism is used for discharging the desalted water in the water storage tank (101), and the electric power system is used for providing electric energy for the drainage mechanism;

the reverse osmosis mechanism comprises a return pipe (501), a filter screen (503), a support body flow pipe (504) and reverse osmosis balls (506), the return pipe (501) is communicated with the support body flow pipe (504) through a branch return pipe (502), the support body flow pipe (504) is connected with at least three reverse osmosis balls (506), the reverse osmosis balls (506) are covered by the filter screen (503), and fresh water filtered by the reverse osmosis balls (506) is conveyed to the water storage cylinder (101) through the return pipe (501);

the reverse osmosis ball (506) comprises a filter bag (5061), an activated carbon layer (5062), a reverse osmosis membrane (5063) and a spherical skeleton (5064) from outside to inside, the spherical skeleton (5064) surrounds a central cavity (5065), and external seawater enters the central cavity (5065) through reverse osmosis.

2. The fresh water reserve station based on reverse osmosis seawater desalination technology of claim 1, characterized in that: the water inlet of the water storage internal rotation cylinder (602) receives the desalinated water of each seawater desalination device through a confluence main pipe (601), a water level detector is arranged in the water storage internal rotation cylinder (602), and when a water full signal is detected, fresh water in the water storage internal rotation cylinder (602) is discharged into a large water bin (701) through a high-pressure pump (604).

3. The fresh water reserve station based on reverse osmosis seawater desalination technology of claim 1, characterized in that: the side wall of the water storage tank (101) is symmetrically provided with two earrings (102), and a traction rope (105) is inserted into the earrings (102) to limit the position of the water storage tank (101); the upper surface of the water storage tank (101) is of a plane structure, and the diameter of the over-center point of the water storage tank (101) is larger than the height of the over-center point.

4. A fresh water reserve station based on reverse osmosis seawater desalination technology according to any one of claims 1-3, characterized in that: an additional reverse osmosis ball (506) is arranged below the reverse osmosis ball (506) connected with the support body flow pipe (504), and two longitudinally adjacent reverse osmosis balls (506) are connected through a pipeline connector (505).

5. The fresh water reserve station based on reverse osmosis seawater desalination technology of claim 1, characterized in that: the drainage mechanism comprises a water suction pump (402), a controller (404), an upper water level detector (405) and a lower water level detector (406), wherein the upper water level detector (405) and the lower water level detector (406) are arranged at different heights of the water storage cylinder (101) to detect water level information in the water storage cylinder (101), detection signals are transmitted to the controller (404), and the controller (404) controls the action of the water suction pump (402) to suck fresh water out.

6. The fresh water reserve station based on reverse osmosis seawater desalination technology of claim 1, characterized in that: the power system comprises a photovoltaic power generation module, a wind driven generator (202) and/or a water flow generator (201) which are/is arranged on a water storage tank (101), the photovoltaic power generation module and the wind driven generator (202) are fixed above the water storage tank (101), the water flow generator (201) is arranged at the bottom of the water storage tank (101), generated power is stored in a power storage module (203), and the power storage module (203) is electrically connected with a storage battery (702) arranged on a large water sump (701).

7. The fresh water reserve station based on reverse osmosis seawater desalination technology of claim 6, characterized in that: the photovoltaic power generation module comprises a photovoltaic module (301), a rotating base (302), a telescopic rod (303) and a support rod (304), wherein the rotating base (302) is arranged on the upper surface of the water storage tank (101), the photovoltaic module (301) is supported above the rotating base (302) through the telescopic rod (303) and the support rod (304), and the telescopic rod (303) is used for adjusting the inclination angle of the photovoltaic module (301).