KR101061546B1 - Seawater Desalination System Using Wave Power - Google Patents

Abstract

In order to provide a seawater desalination apparatus using wave power without the input of power from a separate power source from the outside, the present invention provides a rotary rod receiving the movement of the floater floating in accordance with the elevation of the sea surface; A cylinder which is lifted in association with the movement of the rotary rod, and the cylinder sucks and pressurizes seawater according to the lift of the piston; Reverse osmosis seawater desalination means for desalination of seawater discharged from the cylinder; And it provides a seawater desalination device using a wave force comprising a pressure holding means for maintaining the flow of seawater in the inlet and outlet of the cylinder in one direction.

Wave power, cylinder, seawater desalination, reverse osmosis

Description

Apparatus for making fresh water from sea water using force of wave}

The present invention relates to a seawater desalination device using wave power, and more particularly, to a seawater desalination device using wave power capable of generating pressure for reverse osmosis water purification without a separate power source other than wave power.

Since desalination generally requires a lot of energy, a major problem in seawater desalination is how efficiently energy is used to produce freshwater.

In other words, the conventional seawater desalination device is generally pressurized to reach the reverse osmosis pressure to pass through the reverse osmosis membrane to desalination, but in order to pressurize the seawater above the reverse osmosis pressure is consumed a lot of energy and resources, it is difficult to commercialize easily There was a problem, and due to these problems, only a few oil producing countries with abundant fuel resources were installed with a reverse osmosis desalination system.

Many researches have been carried out to solve these problems, including the study of a device for desalination of seawater using renewable energy. In general, the seawater desalination using renewable energy can be largely divided into solar, wave, and wind.

However, in order to desalination of seawater in a conventional manner, the seawater is pumped and passed through the seawater with a reverse osmosis membrane filter to make freshwater, or by converting electrical energy generated from renewable energy into thermal energy to desalination of seawater by distillation. As such, there is a problem of low energy efficiency because the seawater is desalted using the generated power after producing electricity by using renewable energy.

Moreover, even when using wind, the power generated is low in state, so that it is difficult to pressurize the seawater to reverse osmosis, and its mechanical and electronic configuration is complicated, so that it is difficult to substantially mass produce.

The present invention is to solve the above problems to provide a seawater desalination device using a wave power that does not substantially require additional energy source.

In order to solve the above problems, the present invention is a rotary rod receiving the movement of the floater floating in accordance with the elevation of the sea surface; A cylinder which is lifted in association with the movement of the rotary rod, and the cylinder sucks and pressurizes seawater according to the lift of the piston; Reverse osmosis seawater desalination means for desalination of seawater discharged from the cylinder; And pressure holding means for maintaining the flow of seawater in the inlet and outlet of the cylinder in one direction, wherein the plotter has a shape extending in a predetermined length along a horizontal direction perpendicular to the installation direction of the rotating rod to transmit the torsional moment. The other end of the rotating rod is provided with a horizontal rod, the cylinder is provided at each end of the horizontal rod so as to receive the power generated during the seesaw movement and rotational movement of the rotary rod, the rotary rod and The connection portion of the support for supporting provides a seawater desalination device using wave force provided with a bearing device for supporting the seesaw and rotational movement of the rotary rod at the same time.

Here, the reverse osmosis seawater desalination means includes a pressure tank in which the seawater discharged from the cylinder is stored in a pressurized state, a pretreatment filter unit for filtering foreign substances of seawater discharged from the pressure tank, and seawater from the pretreatment filter unit. It is preferable to include a reverse osmosis membrane portion that is delivered to pass through the desalted water by reverse osmosis.

In addition, the pressure holding means has a first check valve for opening only the passage of sea water from the cylinder discharge port side to the reverse osmosis seawater desalination means inlet side, and a second check valve for opening only the passage of sea water from the seawater storage tank to the cylinder inlet side. It is preferable to include.

On the other hand, the plotter is equipped with a strainer that is naturally washed as the inflow and outflow of seawater in accordance with the fluctuation of the wave, and the joining pipe connected to the suction port of the cylinder is connected to the fine filter provided at the bottom of the strainer Do.

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The above-mentioned solution of the present invention provides the following effects.

First, since it provides a reverse osmosis seawater desalination device that operates substantially non-powered using wave energy without the input of additional resources and energy, it requires a lot of resources and energy, so it is not easily commercialized in countries other than oil producing countries. I can solve it.

Secondly, the seawater discharged from the cylinder is stored in the pressure tank, the pressure tank performs an actuator function, and stores the pressure energy to achieve the continuous operation of the reverse osmosis desalination means to achieve an effective seawater desalination.

Third, as the rotary rod receives the continuous change of sea level as the power of the seesaw, the relatively large pressing force can be transmitted to the cylinder by the lever principle, and the cylinder also performs a damper buffer function. It can increase durability and ensure stable operation.

Fourth, by receiving the three-dimensional change of the sea surface in the vertical seesaw movement through the rotating rod and the horizontal rotation through the horizontal rod to pressurize the seawater required for the reverse osmosis seawater desalination despite the small displacement Can generate lasting power for That is, the driving device using seawater according to the present invention can continuously transmit not only the seesaw movement of the rotating rod but also the rotational movement due to the torsional moment to the cylinders disposed at both ends of the horizontal rod.

Fifth, the inflow of seawater pressurized by the reverse osmosis seawater desalination means by the pressure holding means comprising a check valve assembly of a simple structure connecting the connecting pipe connecting the pair of cylinders, reverse osmosis seawater desalination means and the pressure tank Since it can be maintained in one direction, the structure is simple, economical and continuous power transmission can be performed.

Sixth, the suction portion of the sea water comprises a buoy floating on the sea surface, since the straining net is installed to naturally wash as the sea water flows in and out as the wave ripples, foreign matter inflow from the seawater sucked from sea water Can be reduced efficiently.

Hereinafter, with reference to the accompanying drawings will be described in detail the seawater desalination apparatus using the wave force in accordance with a preferred embodiment of the present invention.

1 is a side view showing the outline of the seawater desalination apparatus using the wave force according to an embodiment of the present invention.

As shown in Figure 1, the seawater desalination apparatus using the wave force according to the present invention comprises a drive unit, a cylinder 50, reverse osmosis desalination means, pressure holding means.

Here, the driving unit includes a rotation rod 20 for receiving the movement of the floater 10 floating in accordance with the elevation of the sea surface to be transmitted to the piston built in the cylinder 50. By operation of the drive unit, the cylinder 50 sucks and pressurizes seawater contained in seawater, and then delivers it to the reverse osmosis desalination means. At this time, the end portion of the cylinder inlet-side pipe 52 through which the seawater is sucked is preferably connected to the plotter 10 equipped with a filtering device (not shown) for filtering out foreign substances in the seawater.

On the other hand, the reverse osmosis seawater desalination means is supplied to the seawater pressurized by the cylinder 50 is a pressure tank 90, pressure valve 68a, pretreatment filter unit 69, reverse osmosis membrane unit 60, and the reservoir It is preferable to include 70.

In detail, the reverse osmosis seawater desalination means is a device for desalination of seawater using a reverse osmosis (REVERSE OSMOSIS) phenomenon, and when the pressure of the osmotic pressure is applied to the high concentration solution side like the seawater, the water of the high concentration solution side passes through the reverse osmosis membrane and has a low concentration. It is desalted as it moves to the solution side. The desalted water in this way can be used as drinking water through post-treatment such as the addition of minerals, since the salt is removed and substantially pure water such as distilled water. At this time, since the high pressure corresponding to the reverse osmosis pressure is required to pass the reverse osmosis membrane, the seawater must be pressurized, and in this process, about 50% or more (90% of the current technical level) of the seawater cannot be desalted and recovered. It can be discharged back out through the line.

Here, the pressure tank 90 functions as an actuator filled with the seawater supplied from the cylinder furnace 50 in a pressurized state, and performs a storage and buffering function of the pressurized seawater. That is, the pressure tank 90 may store the energy required to pressurize the fluid, thereby maintaining the seawater supply state from the pressure tank 90 to the reverse osmosis membrane portion 60 in a relatively continuous state. . In addition, a pressure valve 68a is provided at the connection pipe 68 provided at the discharge end of the pressure tank 90, and the pressure valve 68a has a seawater pressure inside the pressure tank 90 equal to or greater than reverse osmosis pressure. Preferably controlled by the control means to seal the pressure tank 90 until it rises to.

In addition, the pressurized seawater of the pressure tank 90 is reverse osmosis membrane portion 60 in which the reverse osmosis membrane is embedded through a pretreatment filter portion 69 for filtering foreign matters such as seaweed and sludge through the connection pipe 68. The water desalted in the reverse osmosis manner in the reverse osmosis membrane unit 60 using the supplied seawater is stored in the reservoir 70 to be used where necessary. At this time, the seawater that is not desalted in the reverse osmosis membrane unit 60 is drained to the outside again, and the discharged seawater also has a pressure energy in a pressurized state, so that it is used for power generation in connection with a fluid driving motor and a generator. You may be able to.

On the other hand, there is provided with a pressure holding means for maintaining the flow of the sea water of the inlet and discharge port of the cylinder in one direction so that the sea water is discharged from the cylinder in a pressurized state, the pressure holding means is a suction port of the cylinder 50 as shown And a first check valve provided in the side pipe 52 and a second check valve 56 provided in the discharge port side pipe 51 of the cylinder. The operation of the pressure holding means will be described later with reference to FIG. 5.

As described above, according to the present invention, the seawater can be desalted by only the wave energy without the input of additional resources and energy from the outside, thereby implementing a practically non-powered seawater desalination apparatus. That is, the driving unit for generating and transmitting the power for generating the seawater to reverse osmosis substantially from the wave energy to the reverse osmosis seawater desalination apparatus will be described in detail as follows.

As shown in FIG. 1, the seawater desalination device driving unit using the wave force according to the present invention includes a support 30, a rotating rod 20, a cylinder 50, and a pressure holding means.

Here, the support 30 is preferably installed in the breakwater (1) in the area where the height of the water level is changed by the natural environment, such as the beach. Here, the breakwater (1) is a concept that includes not only the general seashore breakwater, but also the outer edge of the sea structure provided adjacent to the sea surface.

In addition, the rotation rod 20 is rotatably installed on the support (30). At this time, it is preferable that the bearing device 25 is provided at the connection portion of the rotation rod 20 and the support 30, and through this the rotation rod 20 is in various directions based on the upper end of the support 30. Can be rotated.

In detail, one end of the rotary rod 20 is disposed to face the water surface, the end of which is provided with a floater 10 is floating along the elevation of the surface by buoyancy. At this time, the plotter 10 is preferably provided in a shape extending a predetermined length in the horizontal direction perpendicular to the installation direction of the rotary rod 20.

In addition, the other end of the rotary rod 20 is disposed toward the breakwater (1) inside, the end of the extension rod 40 connected to the other end piston which is built in the cylinder 50 (41 in Figure 5) Are connected). A separate bearing device 26 is also provided at the connection portion of the extension rod 40 and the rotation rod 20 so that the movement of the rotation rod 20 flowing in various directions is smoothly transmitted to the extension rod 40.

Here, a space filled with seawater is formed in the cylinder 50 fixed to the inner space of the breakwater 1, and the suction and pressurized discharge action of the seawater is performed in accordance with the vertical movement of the piston disposed in the space. To be performed. At the same time, the cylinder 50 also performs a damper function to buffer the movement of the rotary rod 20.

That is, the piston is lifted in the cylinder 50 in conjunction with the rotary rod 20 moving in accordance with the elevation of the sea surface, the seawater stored in the cylinder 50 inside the lifting process is pressurized by the external reverse osmosis desalination It is selectively discharged to the means side. To this end, the discharge port of the cylinder 50 is connected to the pressure tank 90 and the discharge port side pipe 51 of the reverse osmosis seawater desalination means. That is, the cylinder 50 receives the movement of the rotating rod 20 and inhales and pressurizes the seawater to supply the seawater desalination means, thereby implementing a seawater desalination apparatus of a substantially non-powered reverse osmosis system.

Here, the reverse osmosis seawater desalination means is a pressure tank (90) in which the seawater discharged by being discharged from the cylinder (50) is stored in a pressurized state, and receives seawater from the pressure tank (90) to desalination in a reverse osmosis system. It is preferable to include a reverse osmosis membrane portion 60 for passing the water, and the reservoir 70 is stored so that the desalted water through the reverse osmosis membrane portion 60 is used as needed. Of course, a pretreatment filter unit may be provided between the pressure tank 90 and the reverse osmosis membrane unit 60 to filter foreign substances in seawater.

On the other hand, Figure 2a is a perspective view showing the main part of the seawater desalination apparatus using the wave force according to an embodiment of the present invention.

As shown in Figure 2a, the rotating rod 20 includes a vertical rod 21 and a horizontal rod provided at the rear end of the vertical rod 22 while the seesaw movement while being supported by the support 20 Is preferred. Here, the power generated during the rotation of the horizontal rod 22 provided at the other end of the rotary rod 20 is transmitted to the cylinder 50 is arranged connected to both ends thereof.

In general, the sea level is not elevated in a uniform planar state, but irregular and three-dimensional elevation is repeated. Therefore, the lift of the plotter 10 according to the three-dimensional change of the sea level is transmitted to the lift motion of the horizontal rod 22 through the seesaw operation of the vertical rod 21. In addition, depending on the difference in the three-dimensional lifting state of the sea level, the plotter 10 may be rotated as well as lifted, the rotation of the plotter 10 is the horizontal through the axial rotation operation of the vertical rod 21 It is transmitted to the rotational motion of the rod 22.

To this end, the plotter 10 is preferably made of a shape extending a predetermined length along the horizontal direction of the sea surface perpendicular to the installation direction of the vertical rod 21 of the rotary rod 20 to transmit the torsional moment.

The process of the movement of the rotary rod 20 according to the change of the sea level to the piston in the cylinder 50 will be described in more detail as follows.

Figure 2b is a perspective view showing an example of the support structure of the rotating rod of the seawater desalination apparatus using the wave force according to an embodiment of the present invention.

As shown in Figure 2b, the bearing portion 25 is provided at the connection portion of the rotary rod 20 and the support 30. In detail, the bearing device 25 is provided on a support frame connecting the cylindrical bearing 25a and the cylindrical bearing 25a disposed to surround the circumference of the rotary rod, and the rotation support device connected to the support frame. And 25b. In other words, the bearing device 25 functions as a special type of universal joint.

Therefore, the rotary rod 20 is the seesaw movement relative to the support 30 by the rotary support device 25b, as well as rotated while being supported by the cylindrical bearing (25a) the rotary rod Enable three-dimensional movement of (20). In this case, the rotation support device 25b may also be configured to have a cylindrical bearing coupled.

In addition, the bearing device of the above-described structure can be equally applied to the bearing device 26 provided at the connection portion of the horizontal rod (22 in Fig. 2a) and the extension rod (40 in Fig. 2a).

Of course, the bearing device can be used in place of ball bearings, general universal joints, and other various connecting means, if necessary to ensure the three-dimensional movement of the rotating rod.

As such, the configuration including the support 30, the rotating rod 20, the cylinder 50, and the bearing device 25 constitutes a drive unit or a power transmission device using sea water as a whole. The driving unit may be applied for the use of power generation in addition to seawater desalination, in which case the seawater sucked into / out of the cylinder may be replaced by a working fluid such as hydraulic oil.

Figure 3a is a schematic diagram showing the horizontal rotation operation of the seawater desalination apparatus using the wave force in accordance with an embodiment of the present invention, Figure 4b is a schematic diagram showing a vertical rotation operation of the seawater desalination apparatus using the wave force in accordance with an embodiment of the present invention to be.

As shown in Figure 3a, when the plotter 10 disposed on the sea surface is lifted in the vertical direction, the vertical rod 21 of the rotating rod is to seesaw along the vertical plane. At this time, a stronger force is transmitted to the cylinder 50 symmetrically through the horizontal rod 22 and the extension rod 40 provided at the rear end of the vertical rod 21 according to the principle of the lever.

In addition, as shown in Figure 3b, when the plotter 10 is rotated, the vertical rod 22 of the rotary rod receives the torsional moment so that the horizontal rod 22 is rotated. Through this, the rotational force of the horizontal rod 22 is transmitted to the cylinder 50 through the extension rod 40 asymmetrically. That is, the driving device using the seawater according to the present invention can continuously transmit not only the seesaw movement of the rotary rod 20 but also the rotational movement due to the torsional moment to the cylinder 50 disposed at both ends of the horizontal rod 22. . Of course, such cylinders may be arranged in multiple pairs, without being limited to one pair.

4 is an overall configuration diagram of a seawater desalination apparatus using wave force according to an embodiment of the present invention.

As shown in FIG. 4, the inner space of the cylinder 50 is divided up and down on the basis of the piston 41, and inlets and outlets are formed in the upper and lower spaces, respectively. When the piston 41 is moved upward, the seawater in the upper space in the cylinder 50 is pressurized and discharged, and the seawater is sucked into the lower space. On the contrary, when the piston 41 moves downward, seawater is sucked into the upper space in the cylinder 50, and the seawater in the lower space is pressurized and discharged.

As described above, according to the ascending and descending of the sea surface, the seawater is selectively sucked through the inlet of the cylinder 50 according to the ascending and descending of the piston 41 connected to the connecting rod 40 provided in the horizontal rod 22.

Here, it is an infinite source of desalination material as a reservoir (R, reservoir) of seawater such as seawater, and the seawater by allowing the confluence pipe 54 connected to the inlet side pipe 52 of the cylinder 50 to be submerged in such seawater. Inhaled. Of course, if the water level difference between the breakwater and the sea level is so large that the pressure loss during inhalation can not be ignored, a pump (not shown) may be used to pump the seawater to be supplied to the confluence pipe 54.

On the other hand, the seawater sucked into the cylinder 50 is pressurized and supplied to the pressure tank 90 side of the reverse osmosis seawater desalination means through the discharge port. The seawater supplied in the pressurized state is filled in the pressure tank 90 and then desalted in the reverse osmosis membrane unit 60 via the pretreatment filter unit 69.

Meanwhile, as described above, the pistons 41 of the cylinders 50 on both sides of the horizontal rod 22 may be lifted symmetrically with each other, or may be lifted in opposite directions, respectively. Even in this case, the pressure tank 90 of the reverse osmosis seawater desalination means needs to ensure a continuous flow of seawater in one direction, and this flow may be made by a pressure maintaining means.

For convenience of description, the pipes connected to the suction port of the cylinder 50 are called suction port side pipes 52, and the pipes connected to the discharge port side are called discharge port side pipes 51.

As shown in FIG. 4, the pressure holding means preferably includes a first check valve 56 and a second check valve 57.

In detail, the first check valve 56 which opens only the passage of seawater flowing from the discharge port side to the reverse osmosis seawater desalination means and blocks the flow of seawater in the opposite direction to the discharge port side pipe 51. Each of the inlet-side pipes 52 is provided with only the passage of seawater from the storage source R of seawater through the conduit pipe 54 to the inlet port side of the cylinder 50, and blocks the flow of seawater in the opposite direction. A second check valve 57 is provided.

Accordingly, the seawater discharged from the cylinder 50 according to the movement of the piston 41 flows into the reverse osmosis pressure seawater desalination means via the pressure tank 90 only through the discharge port side pipe 51 and is reverse osmosis membrane portion ( It goes through the desalination process through 60). On the other hand, the seawater of the storage source R of the seawater sucked through the confluence pipe 54 according to the movement of the piston 41 is sucked into the cylinder 50 only through the inlet-side pipe 52.

The pressure tank 90 of the reverse osmosis seawater desalination means may maintain a one-way seawater flow in which only the seawater in a pressurized state is introduced by the pressure maintaining means.

In addition, the pressure holding means is an example of the configuration that can maintain the movement of the seawater in one direction based on the reverse osmosis seawater desalination means, it can be easily modified in various configurations, such a modification is within the scope of the present invention Will belong.

Through such a configuration, there is provided a practical non-powered reverse osmosis seawater desalination device capable of realizing the reverse osmosis seawater desalination using only wave energy without input of additional energy and resources from the outside.

On the other hand, as shown in Figure 4, the confluence pipe 54 at the end of the cylinder inlet-side pipe 52 is connected to the seafloor in a state connected to the plotter 10 equipped with a filtering device for filtering foreign matter when inhaling seawater. It is preferably arranged to be locked.

That is, the plotter 10 includes a buoy 16 that floats on the sea surface, and the strainer 17 is installed in a natural manner as the sea water flows in and out as the wave ripples. The confluence pipe 54 connected to the cylinder suction port side pipe 52 is connected to the micro filter unit 18 provided at the lower end of the sieve network 17.

Figure 5 is a side cross-sectional view taken along the line A-A 'of Figure 4 to show the operation of the plotter applied to the seawater desalination apparatus using the wave force in accordance with an embodiment of the present invention.

As shown in FIG. 5, when the sea level is concavely lowered according to the fluctuation of the wave, the foreign water such as seaweed, which has adhered to the surface, is washed while partially draining the seawater filled inside the sieve 17 (state 1). ). On the other hand, when the wave is high and the sea water surrounds the upper part of the outer periphery of the strainer 17, the seawater is rapidly introduced into the strainer (state 2).

By repeating the above process (state 1,2), by removing the algae and shellfish attached to the outer periphery of the sieve (17) it is possible to reduce the foreign matter to be introduced into the sieve (17) as much as possible, the cylinder The foreign matter content in the seawater sucked into the side can be reduced.

As described above, the present invention is not limited to the above-described embodiments, and the present invention is modified by those skilled in the art without departing from the scope of the claims of the present invention. It is possible that such modifications are within the scope of the present invention.

1 is a side view showing the outline of the seawater desalination apparatus using wave power according to an embodiment of the present invention.

Figure 2a is a perspective view showing the configuration of the seawater desalination device driver using the wave force in accordance with an embodiment of the present invention.

Figure 2b is a perspective view showing the support structure of the rotating rod of the seawater desalination apparatus using the wave force according to an embodiment of the present invention.

Figure 3a is a schematic diagram showing the horizontal rotation operation of the seawater desalination device driver using the wave force in accordance with an embodiment of the present invention.

Figure 3b is a schematic diagram showing the vertical rotation operation of the seawater desalination apparatus using the wave force according to an embodiment of the present invention.

4 is an overall configuration diagram of a seawater desalination apparatus using wave power according to an embodiment of the present invention.

Figure 5 is a side cross-sectional view taken along the line A-A 'of Figure 4 showing the operation of the seawater intake purifier applied to the seawater desalination device using the wave force in accordance with an embodiment of the present invention.

<Description of Symbols for Main Parts of the Present Invention>

10: plotter 20: rotating rod

21: vertical rod 22: horizontal rod

30: support 40: connecting rod

50: cylinder 60: reverse osmosis membrane

70: water tank 90: pressure tank

Claims (5)

Rotating rod receiving the movement of the floater floating as the sea level rises; A cylinder which is lifted in association with the movement of the rotary rod, and the cylinder sucks and pressurizes seawater according to the lift of the piston; Reverse osmosis seawater desalination means for desalination of seawater discharged from the cylinder; And It includes a pressure holding means for maintaining the flow of sea water in the inlet and outlet of the cylinder in one direction, The plotter is made of a shape extending a predetermined length along a horizontal direction perpendicular to the installation direction of the rotating rod to transmit the torsional moment, Horizontal rods are provided at the other ends of the rotating rods, and the cylinders are provided at both ends of the horizontal rods so as to receive power generated during the seesaw and rotational movements of the rotating rods. Seawater desalination device using a wave force is provided in the connection portion of the support rod for supporting the rotary rod and the bearing device for supporting the seesaw and rotational movement of the rotary rod at the same time. The method of claim 1, The reverse osmosis desalination means is A pressure tank for storing the seawater discharged from the cylinder in a pressurized state; A pretreatment filter unit filtering foreign substances in seawater discharged from the pressure tank; Seawater desalination apparatus using a wave power, characterized in that comprises a reverse osmosis membrane unit for receiving the seawater from the pre-treatment filter unit and passing the desalted water in a reverse osmosis system. The method of claim 1, The pressure holding means is A first check valve for opening only the passage of seawater from the cylinder discharge port side to the reverse osmosis seawater desalination means inlet port; Seawater desalination apparatus using a wave force comprising a second check valve for opening only the passage of seawater from the seawater storage tank to the cylinder inlet side. delete The method of claim 1, The floater is installed with a filtering net that is naturally washed as the sea water flows in and out as the wave ripples, and a joining pipe connected to the suction port of the cylinder is connected to the micro filter provided at the bottom of the strainer. Seawater desalination device using wave power.

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