Seawater pressurization energy recovery device

Abstract

The utility model relates to the technical field of seawater pressurization, and provides a seawater pressurization energy recovery device which comprises a machine shell, the machine shell is provided with a water pumping cavity and a filtering cavity, the machine shell is provided with a water inlet and a purified water outlet, the water inlet is communicated with the water pumping cavity, the purified water outlet is communicated with the filtering cavity, and the purified water outlet is used for discharging filtered seawater; the inlet one-way valve is arranged between the water pumping cavity and the water inlet and is used for preventing seawater entering the water pumping cavity from being discharged from the water inlet; the first piston is arranged in the water pumping cavity in a sealed and sliding mode, the water pumping cavity and the filtering cavity are each provided with a first communication opening, the water pumping cavity and the filtering cavity are communicated through the first communication openings, and after the first piston slides, the first piston is used for pumping seawater into the water pumping cavity through the water inlet or pressing the seawater into the filtering cavity through the first communication openings. According to the technical scheme, the problems of complicated structure and complicated operation process in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of seawater pressurization recovery, and specifically to a seawater pressurization energy recovery device. Background Art

[0002] As the problem of water shortage becomes increasingly prominent, especially in coastal areas, seawater desalination and utilization have become an important way to alleviate water shortage. However, the desalination process consumes a lot of energy, especially the high-pressure pumping link, whose energy consumption accounts for a large proportion of the entire desalination process. Therefore, how to reduce energy consumption while ensuring the efficiency of seawater desalination and achieve sustainable development of seawater utilization has become a technical challenge to be solved. However, the existing seawater pressurized energy recovery device still has some problems in practical applications, such as unstable energy recovery efficiency, poor filtering effect, severe equipment wear, and high maintenance difficulty. Therefore, the development of a seawater pressurized energy recovery device with simple structure, stable operation, high energy recovery efficiency and good filtering effect is of great significance to promote the practical application of seawater desalination and utilization technology. Utility Model Content

[0003] The utility model provides a seawater pressurized energy recovery device, which solves the problems of complex structure and complex operation process of energy recovery equipment in related technologies.

[0004] The technical solution of the utility model is as follows:

[0005] Seawater pressurization energy recovery device, comprising:

[0006] A casing, wherein the casing has a water pumping cavity and a filtering cavity, the water pumping cavity has the water inlet, the filtering cavity has a clean water outlet, the casing has a first communicating port, and the water pumping cavity is connected with the filtering cavity through the first communicating port;

[0007] an inlet one-way valve, disposed between the pumping cavity and the water inlet, for preventing the seawater entering the pumping cavity from being discharged from the water inlet;

[0008] The first piston is slidably disposed in the water pumping cavity. After the first piston slides, it is used to pump the seawater into the water pumping cavity through the water inlet, or to press the seawater into the filtering cavity through the first connecting port.

[0009] As a further technical solution, the first piston seal is slidingly arranged in the water pumping cavity.

[0010] As a further technical solution, the housing further comprises a pressurized cavity, the pressurized cavity is connected to the first communication port, and further comprises:

[0011] The RO membrane is arranged in the pressurized cavity. The RO membrane forms a filtering cavity. The seawater enters the filtering cavity through the RO membrane.

[0012] As a further technical solution, it also includes:

[0013] An adsorbent, disposed in the filter cavity;

[0014] The disinfection component is arranged on the adsorption component and is located in the filter cavity.

[0015] As a further technical solution, it also includes:

[0016] A filter check valve is arranged at the first communication port, and the filter check valve is used to prevent the water entering the pressurized cavity from flowing back.

[0017] As a further technical solution, the housing further comprises a connecting cavity, the connecting cavity comprises a first area and a second area, the connecting cavity is connected to the water pumping cavity, the connecting cavity is connected to the pressurizing cavity, and further comprises:

[0018] The second piston is slidably disposed in the connecting cavity. When the second piston is located in the first area, the connecting cavity is connected with the pumping cavity and the pressurizing cavity. When the second piston is located in the second area, the connecting cavity is not connected with the pumping cavity and the pressurizing cavity.

[0019] As a further technical solution, the casing has a concentrated water outlet, and the concentrated water outlet is connected to the pressurized cavity.

[0020] As a further technical solution, it also includes:

[0021] A toggle plate, hingedly arranged on the first piston;

[0022] A hinged rod has one end hingedly arranged on the toggle plate and the other end hingedly arranged on the second piston. After the toggle plate swings, it is used to drive the first piston and the second piston to move in the casing.

[0023] The working principle and beneficial effects of the utility model are:

[0024] In this embodiment, the design aims to utilize the flow potential energy of seawater for energy recovery and achieve preliminary filtration of seawater at the same time. The casing is made of high-strength corrosion-resistant material to ensure long-term stable operation in a seawater environment. The interior of the casing is divided into a pumping cavity and a filtering cavity, which are effectively isolated by a physical partition or an embedded structure. A water inlet and a clean water outlet are provided on the casing. The water inlet is connected to an external seawater source to introduce seawater into the pumping cavity; the clean water outlet is connected to the filtering cavity to discharge the filtered seawater. An inlet check valve is installed on the connecting pipe between the pumping cavity and the water inlet. The check valve allows seawater to flow from the water inlet into the pumping cavity in one direction to prevent seawater from flowing back to the external seawater source under reverse pressure. The first piston is made of wear-resistant and seawater corrosion-resistant material, has a smooth surface, and forms a good seal with the inner wall of the pumping cavity. The piston is connected to an external power source through a connecting rod or other driving mechanism to achieve reciprocating sliding. A first connecting port is provided on the side walls of the pumping cavity and the filtering cavity. When the first piston slides in the pumping cavity, its positional relationship with the first connecting port changes, thereby controlling the flow direction of seawater. In the process of the first piston sliding toward one end of the pumping cavity, the inlet one-way valve at the water inlet opens, and seawater enters the pumping cavity through the water inlet. At this time, there is a gap between the first connecting port and the first piston, and seawater can freely enter the filter cavity through the first connecting port. When the first piston slides toward one end of the filter cavity driven by the power source, the inlet one-way valve at the water inlet closes to prevent seawater from flowing back. The first piston compresses the seawater in the pumping cavity, allowing it to enter the filter cavity through the first connecting port. In this process, the seawater is pressurized and purified by the filter medium in the filter cavity. The filtered seawater flows out from the clean water outlet under pressure for subsequent seawater desalination, cooling or other purposes. When the first piston slides toward one end of the pumping cavity again, the seawater pressure in the filter cavity decreases, preparing for the next cycle. Through the above design, the seawater pressurization energy recovery device of this embodiment cleverly utilizes the flow potential energy of seawater for energy recovery, and combines the reciprocating motion of the first piston to achieve pressurized filtration of seawater. The device has a compact structure and is easy to operate. It can provide clean filtered seawater while making full use of natural resources, and is suitable for various seawater utilization scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0026] Figure 1 This is a schematic diagram of the structure of the first state of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the second state of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the third state of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the fourth state of the utility model.

[0030] In the figure: 1. casing, 2. pumping cavity, 3. filtering cavity, 4. water inlet, 5. clean water outlet, 6. inlet one-way valve, 7. first piston, 8. first connecting port, 9. pressurizing cavity, 10. adsorption element, 11. RO membrane, 12. disinfection element, 13. filtering one-way valve, 14. connecting cavity, 15. second piston, 16. concentrated water outlet, 17. toggle plate, 18. hinged rod, 19. first area, 20. second area. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, they can also be understood as further technical solutions without paying creative work. In some figures, components with the same structure or function are only schematically illustrated, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0032] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] Example

[0035] Reference Figure 1-Figure 4 , is an embodiment of the utility model, and proposes

[0036] The seawater pressurized energy recovery device comprises: a casing 1, wherein the casing 1 has a pumping cavity 2 and a filtering cavity 3, the pumping cavity 2 has a water inlet 4, the filtering cavity 3 has a clean water outlet 5, the casing 1 has a first connecting port 8, and the pumping cavity 2 is connected with the filtering cavity 3 through the first connecting port 8; an inlet check valve 6, which is arranged between the pumping cavity 2 and the water inlet 4, and is used to prevent the seawater entering the pumping cavity 2 from being discharged from the water inlet 4; a first piston 7, which is slidably arranged in the pumping cavity 2, and after the first piston 7 slides, it is used to pump seawater into the pumping cavity 2 through the water inlet 4, or press seawater into the filtering cavity 3 through the first connecting port 8.

[0037] The present embodiment provides a seawater pressurized energy recovery device, which is designed to utilize the flow potential energy of seawater for energy recovery and achieve preliminary filtration of seawater at the same time. The housing 1 is made of high-strength corrosion-resistant material to ensure long-term stable operation in a seawater environment. The interior of the housing 1 is divided into a pumping cavity 2 and a filtering cavity 3, which are effectively isolated by a physical partition or an embedded structure. A water inlet 4 and a clean water outlet 5 are provided on the housing 1. The water inlet 4 is connected to an external seawater source to introduce seawater into the pumping cavity 2; the clean water outlet 5 is connected to the filtering cavity 3 to discharge the filtered seawater. An inlet check valve 6 is installed on the connecting pipe between the pumping cavity 2 and the water inlet 4. The check valve allows seawater to flow from the water inlet 4 into the pumping cavity 2 in one direction, preventing seawater from flowing back to the external seawater source under reverse pressure. The first piston 7 is made of wear-resistant and seawater corrosion-resistant material, has a smooth surface, and forms a good seal with the inner wall of the pumping cavity 2. The piston is connected to an external power source through a connecting rod or other driving mechanism to achieve reciprocating sliding. The side walls of the pumping cavity 2 and the filtering cavity 3 are both provided with a first connecting port 8. When the first piston 7 slides in the pumping cavity 2, the positional relationship between the first piston 7 and the first connecting port 8 changes, thereby controlling the flow direction of the seawater. In the process of the first piston 7 sliding toward one end of the pumping cavity 2, the inlet check valve 6 at the water inlet 4 opens, and the seawater enters the pumping cavity 2 through the water inlet 4. At this time, there is a gap between the first connecting port 8 and the first piston 7, and the seawater can freely enter the filtering cavity 3 through the first connecting port 8. When the first piston 7 slides toward one end of the filtering cavity 3 driven by the power source, the inlet check valve 6 at the water inlet 4 closes to prevent the seawater from flowing back. The first piston 7 compresses the seawater in the pumping cavity 2, so that it enters the filtering cavity 3 through the first connecting port 8. In this process, the seawater is pressurized and purified by the filter medium in the filtering cavity 3. The filtered seawater flows out from the clean water outlet 5 under pressure for subsequent seawater desalination, cooling or other purposes. When the first piston 7 slides toward one end of the pumping cavity 2 again, the seawater pressure in the filtering cavity 3 decreases, preparing for the next cycle. Through the above design, the seawater pressurization energy recovery device of this embodiment cleverly utilizes the flow potential energy of seawater for energy recovery, and combines the reciprocating motion of the first piston 7 to achieve pressurized filtration of seawater. The device has a compact structure and is easy to operate. It can provide clean filtered seawater while making full use of natural resources, and is suitable for various seawater utilization scenarios.

[0038] Furthermore, the housing 1 also has a pressurized cavity 9, which is connected to the first connecting port 8, and also includes: an RO membrane 11 arranged in the pressurized cavity 9, the RO membrane 11 surrounds the filter cavity 3, and seawater enters the filter cavity 3 through the RO membrane 11 and the adsorbent 10.

[0039] In this embodiment, the structure of the casing 1 is further improved, a pressurized cavity 9 is added, and an RO membrane 11 is arranged in the pressurized cavity 9 to achieve deep desalination and filtration of seawater. A pressurized cavity 9 is added inside the casing 1, which is connected to the pumping cavity 2 and the filtration cavity 3 through the first connecting port 8. The setting of the pressurized cavity 9 is intended to provide an independent, pressure-adjustable working environment for the RO membrane 11 to meet the high-efficiency desalination and filtration requirements of the RO membrane 11. The RO membrane 11 assembly is installed in the pressurized cavity 9. The RO membrane 11 is made of a polymer composite material and has the characteristics of high desalination rate, corrosion resistance, and pollution resistance. The RO membrane 11 assembly forms a closed filtration cavity 3 around the internal space of the pressurized cavity 9, and seawater needs to pass through the RO membrane 11 to enter the filtration cavity 3. The RO membrane 11 assembly includes an adsorbent 10, which is used to guide the seawater to be evenly distributed on the surface of the RO membrane 11, improve the desalination efficiency, and collect fresh water that passes through the RO membrane 11. The adsorbent 10 is tightly combined with the RO membrane 11 to form an integrated structure. The first piston 7 slides back and forth in the pumping cavity 2, draws seawater from the water inlet 4, and pressurizes it into the pressurizing cavity 9 through the first connecting port 8. The pressurized seawater contacts the RO membrane 11 in the pressurizing cavity 9, most of the salt, minerals, microorganisms, etc. are retained, and only water molecules and some small molecules can pass through the RO membrane 11 into the filtration cavity 3. This process achieves deep desalination of seawater, and the obtained fresh water has high purity and meets the needs of various uses. The filtered fresh water accumulates in the pressurizing cavity 9 and is finally discharged through the clean water outlet 5 connected to the filtration cavity 3. In order to ensure smooth discharge of fresh water, a pressure regulating valve or an automatic drainage device may be provided at the clean water outlet 5. Through the improvement of this embodiment, the seawater pressurized energy recovery device can not only utilize the flow potential energy of seawater for energy recovery and preliminary filtration, but also realize deep desalination of seawater through the added pressurized cavity 9 and RO membrane 11, and produce high-quality fresh water for drinking, irrigation, industry, etc. This integrated design simplifies the equipment structure, improves the efficiency of energy recovery and seawater treatment, and provides strong support for the efficient use of seawater resources.

[0040] Furthermore, it also includes: an adsorption component 10 disposed in the filter cavity 3; and a disinfection component 12 disposed on the adsorption component 10 and located in the filter cavity 3.

[0041] In this embodiment, an adsorbent 10 and a disinfectant 12 are further added to improve the filtering effect and improve the safety of the produced fresh water. An adsorbent 10 is arranged in the filter cavity 3. The adsorbent 10 can be made of materials such as porous ceramics, sintered metals, sponges, etc., and has good adsorption performance and certain mechanical strength. The shape and size of the adsorbent 10 can be used as a further technical solution to improve the filtering efficiency and extend the service life of the filter element. A disinfectant 12 is arranged on the adsorbent 10. The disinfectant 12 can be a device with disinfection and sterilization functions such as an ultraviolet disinfection lamp, an ozone generator, and a silver ion releaser. The disinfectant 12 should be closely matched with the adsorbent 10 to ensure that its working area covers the entire water flow in the filter cavity 3. The main function of the disinfectant 12 is to deeply disinfect the filtered fresh water, kill possible residual bacteria, viruses, spores and other microorganisms, and ensure the biological safety of the produced fresh water. The disinfection process should not affect the water quality as much as possible and should not produce harmful byproducts. The first piston 7 slides back and forth in the pumping cavity 2, draws seawater from the water inlet 4, and pressurizes and sends it into the pressurizing cavity 9 through the first connecting port 8. The seawater contacts the RO membrane 11 in the pressurizing cavity 9, and most of the salt, minerals, microorganisms, etc. are intercepted. Only water molecules and some small molecules can pass through the RO membrane 11 into the filtering cavity 3. The filtered fresh water flows through the adsorbent 10 in the filtering cavity 3, and the adsorbent 10 adsorbs impurities such as tiny particles, colloids, and organic matter to further improve the water quality. The fresh water adsorbed by the adsorbent 10 continues to flow through the disinfection part 12, and is treated by ultraviolet rays, ozone, silver ions and other disinfection methods to effectively kill microorganisms and ensure that the output fresh water meets the safe drinking standard. The disinfected fresh water accumulates in the filtering cavity 3 and is finally discharged through the clean water outlet 5 connected to the filtering cavity 3. In order to ensure smooth discharge of fresh water, a pressure regulating valve or an automatic drainage device can be provided at the clean water outlet 5.

[0042] Furthermore, it also includes: a filtering one-way valve 13 , which is arranged at the first connecting port 8 , and the filtering one-way valve 13 is used to prevent the water entering the pressurized cavity 9 from flowing back.

[0043] In this embodiment, a filter check valve 13 is provided at the first connecting port 8. The filter check valve 13 is a valve that can prevent reverse flow and filter, and its structure generally includes a valve body, a valve flap, a filter element and other parts. The filter element inside the filter check valve 13 allows seawater to flow from the pumping cavity 2 to the pressurizing cavity 9, while blocking large particles of impurities in the seawater. When the pressure in the pressurizing cavity 9 is greater than that in the pumping cavity 2, the valve flap closes under the action of the pressure difference to prevent the backflow of seawater. If the pressure in the pressurizing cavity 9 suddenly drops, the valve flap automatically opens under the action of the spring or medium pressure, allowing seawater to flow back to the pumping cavity 2 to avoid a vacuum state inside the equipment.

[0044] As a further technical solution, the casing 1 also has a connecting cavity 14, the connecting cavity 14 has a first area 19 and a second area 20, the connecting cavity 14 is connected to the water pumping cavity 2, and the connecting cavity 14 is connected to the pressurizing cavity 9, and also includes: a second piston 15, which is slidably arranged in the connecting cavity 14, when the second piston 15 is located in the first area 19, the connecting cavity 14 is connected to the water pumping cavity 2 and the pressurizing cavity 9, and when the second piston 15 is located in the second area 20, the connecting cavity 14 is not connected to the water pumping cavity 2 and the pressurizing cavity 9.

[0045] In this embodiment, by introducing the connecting cavity 14, the flexibility and efficiency of the system in the desalination process are improved. A connecting cavity 14 is added inside the casing 1, and the connecting cavity 14 is designed to have two areas, a first area 19 and a second area 20. This design is intended to flexibly control the flow path of seawater between the pumping cavity 2, the pressurizing cavity 9 and the connecting cavity 14 by changing the position of the second piston 15. The second piston 15 is slidably arranged in the connecting cavity 14 and can move to the first area 19 or the second area 20. When the second piston 15 is located in the first area 19, the connecting cavity 14 is connected with the pumping cavity 2 and the pressurizing cavity 9, and seawater can freely enter the pressurizing cavity 9 from the pumping cavity 2 through the first connecting port 8. On the contrary, when the second piston 15 moves to the second area 20, the connection between the connecting cavity 14 and the pumping cavity 2 and the pressurizing cavity 9 is cut off, thereby realizing the control of the flow path of seawater, which is convenient for the shutdown, maintenance or pressure regulation of the equipment. The power source is activated, driving the first piston 7 to reciprocate in the pumping cavity 2, and extracting seawater through the water inlet 4. At this time, the second piston 15 is located in the first area 19, and the connecting cavity 14 is connected with the pumping cavity 2 and the pressurizing cavity 9. Under the push of the first piston 7, seawater enters the pressurizing cavity 9 through the first connecting port 8. The RO membrane 11 set in the pressurizing cavity 9 starts to work, and the seawater passes through the RO membrane 11 under high pressure to achieve efficient filtration and desalination of salt, minerals, etc., and the purified water enters the filtering cavity 3. The adsorbent 10 and disinfection component 12 installed in the filtering cavity 3 further improve the water quality and ensure the quality of fresh water output.

[0046] Furthermore, the casing 1 has a concentrated water outlet 16 , and the concentrated water outlet 16 is communicated with the pressurized cavity 9 .

[0047] In this embodiment, a concentrated water outlet 16 is further provided, aiming at realizing the effective discharge of concentrated seawater in the pressurized cavity 9 that has not passed through the RO membrane 11, and improving the operation efficiency and economic benefits of the equipment. A concentrated water outlet 16 is provided on the casing 1, and the outlet is directly connected to the pressurized cavity 9. The concentrated water outlet 16 is usually arranged at the bottom or side of the pressurized cavity 9, so as to facilitate the natural discharge of concentrated water under the action of gravity. In the pressurized cavity 9, after the seawater is filtered through the RO membrane 11, a part of the water molecules and small molecules pass through the RO membrane 11 into the filtration cavity 3 and become fresh water; the other part of the seawater containing a higher concentration of salt, minerals, microorganisms, etc. cannot pass through the RO membrane 11, and remains in the pressurized cavity 9 and becomes concentrated water. The concentrated water is discharged from the equipment through the concentrated water outlet 16, and can be used for other purposes, or discharged into the environment after proper treatment.

[0048] Furthermore, it also includes: a toggle plate 17 hingedly arranged on the first piston 7; a hinged rod 18 with one end hingedly arranged on the toggle plate 17 and the other end hingedly arranged on the second piston 15. After the toggle plate 17 swings, it is used to drive the first piston 7 and the second piston 15 to move in the casing 1.

[0049] In this embodiment, a linkage structure of a toggle plate 17 and an articulated rod 18 is further provided, aiming to drive the first piston 7 and the second piston 15 to move synchronously through a single power source, simplify the equipment structure, and improve the operation efficiency. A toggle plate 17 is hingedly provided on the first piston 7. The toggle plate 17 and the first piston 7 are rotatably connected by connecting parts such as hinges and rotating shafts, and the swing of the toggle plate 17 can drive the first piston 7 to move in the pumping cavity 2. An articulated rod 18 is hingedly provided, one end of which is hinged to the toggle plate 17, and the other end is hinged to the second piston 15. The articulated rod 18 plays the role of transmitting power. When the toggle plate 17 swings, the second piston 15 is driven to move in the connecting cavity 14 through the articulated rod 18.

[0050] Drainage switching process: When the handle is lifted from Figure 1 Status to Figure 2 In the state, the switching valve moves downward under the drive of the connecting rod, and the space above the piston is connected to the concentrated water discharge pipe.

[0051] Seawater suction and concentrated water discharge (exhaust) process: When the handle is lifted from Figure 2 Status to Figure 3 In the state, the inlet check valve 6 sucks seawater under the action of atmospheric pressure, and at the same time, the seawater on the upper part of the first piston 7 is discharged under human drive, completing a water suction and discharge process. The first piston 7 moves upward, and the first piston 7 reaches the maximum stroke and is limited.

[0052] Energy recovery process switching: When the handle is pressed from Figure 3 Status to Figure 4In the state, the resistance at the lower part (right side) of the first piston 7 is relatively large, forcing the second piston 15 to move. When the second piston 15 moves to the first area 19 Figure 4 In the state, the drain port is closed, and the concentrated water discharge port of the RO membrane 11 is connected to the upper part of the first piston 7.

[0053] Energy recovery water boosting process: When the handle is pressed down Figure 4 Status to Figure 1 In the state, the inlet one-way valve is closed, and the filter one-way valve 13 is opened under the action of water pressure, and seawater enters the RO membrane 11. Under the action of the RO membrane 11, the seawater entering the membrane shell flows to the bottom of the RO membrane 11, passes through the concentrated water layer of the membrane assembly to reach the leftmost side of the membrane assembly, and then passes through the concentrated water outlet 16, passes through the second piston 15 and enters the upper part (left side) of the first piston 7.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A seawater pressurization energy recovery device, characterized in that: include: A casing (1), the casing (1) comprising a water pumping cavity (2) and a filtering cavity (3), the water pumping cavity (2) comprising a water inlet (4), the filtering cavity (3) comprising a clean water outlet (5), the casing (1) comprising a first connecting port (8), the water pumping cavity (2) being connected to the filtering cavity (3) via the first connecting port (8); an inlet non-return valve (6), arranged between the water pumping cavity (2) and the water inlet (4), and used to prevent the seawater entering the water pumping cavity (2) from being discharged from the water inlet (4); A first piston (7) is slidably disposed in the water pumping cavity (2); after the first piston (7) slides, it is used to pump the seawater into the water pumping cavity (2) through the water inlet (4), or to press the seawater into the filtering cavity (3) through the first connecting port (8).

2. The seawater pressurization energy recovery device according to claim 1, characterized in that: The first piston (7) is sealingly slidably arranged in the water pumping cavity (2).

3. The seawater pressurization energy recovery device according to claim 1, characterized in that: The housing (1) further comprises a pressurized cavity (9), the pressurized cavity (9) being in communication with the first communication port (8), and further comprises: The RO membrane (11) is arranged in the pressurized cavity (9), the RO membrane (11) encloses a filtering cavity (3), and the seawater enters the filtering cavity (3) through the RO membrane (11).

4. The seawater pressurization energy recovery device according to claim 1, characterized in that: Also includes: An adsorption element (10) is arranged in the filter cavity (3); The disinfection element (12) is arranged on the adsorption element (10) and is located in the filter cavity (3).

5. The seawater pressurization energy recovery device according to claim 3, characterized in that: Also includes: A filter check valve (13) is arranged at the first communication port (8), and the filter check valve (13) is used to prevent the water entering the pressurized cavity (9) from flowing back.

6. The seawater pressurization energy recovery device according to claim 3, characterized in that: The housing (1) further comprises a connecting cavity (14), the connecting cavity (14) comprising a first area (19) and a second area (20), the connecting cavity (14) being connected to the water pumping cavity (2), the connecting cavity (14) being connected to the pressurizing cavity (9), and further comprising: A second piston (15) is slidably disposed in the communication cavity (14); when the second piston (15) is located in the first area (19), the communication cavity (14) is connected to the water pumping cavity (2) and the pressurizing cavity (9); when the second piston (15) is located in the second area (20), the communication cavity (14) is not connected to the water pumping cavity (2) and the pressurizing cavity (9).

7. The seawater pressurization energy recovery device according to claim 3, characterized in that: The casing (1) has a concentrated water outlet (16), and the concentrated water outlet (16) is connected to the pressurized cavity (9).

8. The seawater pressurization energy recovery device according to claim 6, characterized in that: Also includes: A toggle plate (17) hingedly arranged on the first piston (7); A hinged rod (18) has one end hingedly arranged on the toggle plate (17) and the other end hingedly arranged on the second piston (15); after the toggle plate (17) swings, it is used to drive the first piston (7) and the second piston (15) to move in the housing (1).

Images