Fluid medium boosting device, seawater desalination system, seawater cooling system

Abstract

The present invention discloses a fluid medium pressurizing device, a seawater desalination system, and a seawater cooling system. The seawater desalination system can utilize two of the fluid medium pressurizing devices, which share a fluid medium inlet and outlet. The two fluid medium pressurizing devices also share a pressure regulating assembly. The pressure regulating assembly can utilize photovoltaic or wave energy to drive the pressure regulating assembly independently or in combination to provide high-pressure source water for the seawater desalination device. The seawater desalination technology disclosed in the present invention can achieve efficient recycling of dispersed energy, eliminating the need for expensive high-pressure seawater pumps, saving electricity, reducing desalination costs, and being economical and environmentally friendly.

Description

Technical Field

[0001] The invention relates to a fluid medium pressurizing device, a seawater desalination system and a seawater cooling system. Background Art

[0002] Currently, nuclear power plants are generally built on the seashore, using the sea as the ultimate heat well. However, since many coastal sites lack sufficient fresh water, seawater desalination is often used as an important way to obtain the fresh water needed for the construction and operation of nuclear power plants. In particular, reverse osmosis desalination technology is mature and widely used.

[0003] Existing desalination technologies rely on high-pressure pumps, which consume a significant amount of electricity and are therefore costly. Consequently, many power plants rely on long, remote locations, drawing water from reservoirs or rivers. These long, costly water lines are difficult to control outside the plant, and the reliability and safety of freshwater resources are limited. Ocean waves, influenced by monsoons, can be destructive, requiring complex revetment systems to prevent erosion. However, this natural or wasted energy is difficult to recycle due to its low concentration.

[0004] For example, the Chinese invention patent application number is 201910577007.2, and the patent name is a seawater desalination system based on wave energy. It includes a first-stage buoy, a second buoy, a third buoy, and a fourth buoy connected in sequence through a transmission bearing, and also includes four sets of boosting units with the same structure. Each boosting unit includes a piston, a piston cylinder, and a hydraulic cylinder connected in sequence, and the bottom of the hydraulic cylinder is an elastic diaphragm. The seawater desalination device includes four sets of seawater desalination units with the same structure. Each set of seawater desalination units is connected to its corresponding boosting unit. The pressure applied by the boosting unit is used to filter seawater through the reverse osmosis membrane to obtain fresh water. Although the seawater desalination system uses wave energy to convert and boost the seawater, it needs to use hydraulic oil as the conversion medium, which makes the entire device too complicated and costly.

[0005] On the other hand, the environmental impact of warm water discharge is a key concern during the initial approval process for nuclear power plants. To minimize this impact, the design of circulating water cooling pumps often incorporates sufficient head margins to facilitate the deep and long-distance discharge of warm water. However, this also results in significant energy waste. Combining the residual head energy of warm water discharge from power plants with wave energy for desalination has yet to be implemented on a large scale. Summary of the Invention

[0006] The present invention provides a fluid medium pressurizing device, a seawater desalination system, and a seawater cooling system, which overcome the shortcomings of the prior art of using wave energy to convert seawater desalination pressurizing, which results in overly complex and costly devices. One of the technical solutions adopted by the present invention to solve the technical problem is:

[0007] A fluid medium pressurizing device, the pressurizing device comprising:

[0008] A piston cylinder body, wherein the piston cylinder body is provided with a fluid medium inlet and a fluid medium outlet;

[0009] A piston is movably mounted in a piston cylinder and is located between a fluid medium inlet and a fluid medium outlet. The piston comprises a large piston body, a small piston body, and a piston rod. Both ends of the piston rod are respectively fixedly connected to the large piston body and the small piston body. An outer end surface of the large piston body corresponds to the fluid medium inlet, and a low-pressure inlet area is formed between the large piston body and the piston cylinder body. An outer end surface of the small piston body corresponds to the fluid medium outlet, and a high-pressure outlet area is formed between the small piston body and the piston cylinder body. A variable-pressure cavity area is enclosed by the inner end surface of the large piston body, the inner end surface of the small piston body, the piston cylinder body, and the outer peripheral surface of the piston rod.

[0010] The pressure regulating component can periodically change the pressure in the variable pressure cavity area, so that the pressure on the large piston body and the small piston body is different. The piston reciprocates under the action of the pressure difference. When the piston moves toward the low-pressure inlet area, the fluid medium can enter the high-pressure outlet area. When the piston moves toward the high-pressure outlet area, the fluid medium in the high-pressure inlet area is output outward and pressurized, thereby achieving continuous pressurization of the fluid medium.

[0011] In a preferred embodiment, the piston includes a first-level piston and a second-level piston placed in series, the first-level piston includes a first-level large piston body, a first-level small piston body and a first-level piston rod, the second-level piston includes a second-level large piston body, a second-level small piston body and a second-level piston rod, a low-pressure inlet area is formed between the outer end surface of the first-level large piston body and the piston cylinder body, the first-level small piston body corresponds to the second-level large piston body, and a high-pressure outlet area is formed between the outer end surface of the second-level small piston body and the piston cylinder body; a first-level pressure-transformation cavity area is formed between the inner end surface of the first-level large piston body, the inner end surface of the first-level small piston body and the piston cylinder body, a second-level pressure-transformation cavity area is formed between the inner end surface of the second-level large piston body, the inner end surface of the second-level small piston body and the piston cylinder body, and the first-level pressure-transformation cavity area is connected to the second-level pressure-transformation cavity area.

[0012] In a preferred embodiment, the cross-sectional area of ​​the first-stage small piston body is smaller than the cross-sectional area of ​​the second-stage large piston body.

[0013] In a preferred embodiment, a flow passage is provided between the low-pressure inlet area and the transformer cavity area, which connects the low-pressure inlet area with the transformer cavity area, and a control valve is provided on the flow passage. When the piston moves toward the high-pressure outlet area to the extreme position, the control valve is triggered to open the flow passage, and when the piston moves toward the low-pressure inlet area to the extreme position, the control valve is triggered to close the flow passage.

[0014] In a preferred embodiment, a connecting channel is provided between the low-pressure inlet area and the high-pressure outlet area, which connects the low-pressure inlet area with the high-pressure outlet area, and a connecting channel one-way valve is provided at the connecting channel to allow the fluid medium of the low-pressure inlet area to flow into the high-pressure inlet area.

[0015] In a preferred embodiment, the connecting channel includes a first-level connecting channel and a second-level connecting channel. The first-level connecting channel passes through the first-level piston from top to bottom and connects the low-pressure inlet area and the gap between the first-level small piston body and the second-level large piston body. The second-level connecting channel passes through the second-level piston from top to bottom and connects the gap between the first-level small piston body and the second-level large piston body and the high-pressure outlet area. The first-level connecting channel is provided with a first-level connecting channel one-way valve, and the second-level connecting channel is provided with a second-level connecting channel one-way valve.

[0016] The second technical solution adopted by the present invention to solve the technical problem is:

[0017] A seawater desalination system, which uses the fluid medium boosting device, includes a reverse osmosis seawater desalination device and the fluid medium boosting device, wherein the fluid medium is seawater, the reverse osmosis seawater desalination device is provided with a high-pressure source seawater inlet, the low-pressure inlet area is connected to the seawater, and the high-pressure outlet area is connected to the high-pressure source seawater inlet.

[0018] In a preferred embodiment, the pressure regulating assembly includes a float and a pressure regulating chamber arranged in a piston cylinder and always connected to the pressure-changing cavity area. The piston cylinder is fixed below the sea surface, and the float floats on the sea surface and can float up and down with the waves. The bottom end of the float extends into the pressure regulating chamber, and the float floats up and down to periodically change the pressure in the pressure-changing cavity area.

[0019] In a preferred embodiment, the pressure regulating chamber is provided with a pressure regulating water outlet hole connected to the seawater, and a pressure regulating one-way valve for allowing the seawater in the pressure regulating chamber to flow out is provided at the pressure regulating water outlet hole.

[0020] In a preferred embodiment, the pressure regulating assembly includes a power station warm wastewater discharge culvert, a turbine and a medium pump connected in sequence. The medium pump is connected to the transformer cavity area through a drainage channel, and a switch valve is provided at the drainage channel. When the piston moves toward the high-pressure outlet area to the extreme position, the switch valve is triggered to close the drainage channel. When the piston moves toward the low-pressure inlet area to the extreme position, the switch valve is triggered to open the drainage channel.

[0021] The third technical solution adopted by the present invention to solve the technical problem is:

[0022] A seawater desalination system, which uses the fluid medium boosting device described above, wherein the fluid medium is seawater. The seawater desalination system includes two fluid medium boosting devices, and the two fluid medium boosting devices share a pressure regulating assembly; the pressure regulating assembly includes a medium pump circulation device, and the medium pump circulation device includes a medium pump circulation pipe and a medium pump, and the two ends of the medium pump circulation pipe are respectively connected to the variable pressure cavity areas of the two fluid medium boosting devices. The medium pump circulation device causes the seawater in the variable pressure cavity area of ​​one fluid medium boosting device to flow to the variable pressure cavity area of ​​the other fluid medium boosting device, and then flows back to the variable pressure cavity area of ​​the original fluid medium boosting device, and circulates reciprocatingly, so that when the piston of one fluid medium boosting device moves toward the low-pressure inlet area, the piston of the other fluid medium boosting device moves toward the high-pressure outlet area, thereby keeping the pressure and water volume of the fluid medium inlet and the fluid medium outlet stable.

[0023] In a preferred embodiment, there are two medium pump circulation pipes, which are respectively connected to the variable pressure cavity areas of two fluid medium boosting devices. A bypass pipe is arranged between the two pipes. The bypass pipe divides the two medium pump circulation pipes into four symmetrically arranged branches. A medium pump pressure valve is installed on each branch pipe, and the medium pump is installed on the bypass pipe. When the medium pump is working, the combined action of the medium pump pressure valve changes the flow direction of the water between the variable pressure cavity areas of the two fluid medium boosting devices.

[0024] In a preferred embodiment, the pressure regulating component also includes a brine energy recovery device, which recovers the residual energy of brine from the seawater desalination system to provide additional power for the flow of water between the transformer cavity areas of the two fluid medium boosting devices.

[0025] In a preferred embodiment, the concentrated brine energy recovery device includes an energy recovery cylinder and an energy recovery piston, which is movably mounted in the energy recovery cylinder. The energy recovery piston divides the space in the energy recovery cylinder into a first connecting chamber, an intermediate chamber, and a second connecting chamber that are not connected to each other. The first connecting chamber and the second connecting chamber are respectively connected to the variable pressure cavity areas of the two fluid medium boosting devices; a partition is provided in the intermediate chamber, which divides the intermediate chamber into a first intermediate sub-chamber and a second intermediate sub-chamber, wherein the first intermediate sub-chamber is provided with a first concentrated brine inlet and a first concentrated brine outlet, and the second intermediate sub-chamber is provided with a second concentrated brine inlet and a second concentrated brine outlet, and an intermediate chamber control valve is provided in the intermediate chamber, which can control the first concentrated brine inlet and the second concentrated brine outlet to be opened at the same time and the first concentrated brine outlet and the second concentrated brine inlet to be closed at the same time, or the first concentrated brine inlet and the second concentrated brine outlet to be closed at the same time and the first concentrated brine outlet and the second concentrated brine inlet to be opened at the same time.

[0026] In a preferred embodiment, the first concentrated brine inlet and the first concentrated brine outlet as well as the second concentrated brine inlet and the second concentrated brine outlet are arranged side by side and are respectively located on both sides of the partition. The intermediate chamber control valve includes a valve stem and a first valve block and a second valve block respectively fixed to both ends of the valve stem. The valve stem is movably connected to the partition. The two side walls of the energy recovery piston are respectively provided with a first top block and a second top block. When the energy recovery piston moves to the extreme position on one side, the second top block presses against the valve stem so that the second valve block blocks the second concentrated brine inlet and the first valve block blocks the first concentrated brine outlet. When the energy recovery piston moves to the extreme position on the other side, the first top block presses against the valve stem so that the first valve block blocks the first concentrated brine inlet and the second valve block blocks the second concentrated brine outlet.

[0027] In a preferred embodiment, the pressure signals of the first intermediate sub-chamber and the second intermediate sub-chamber trigger the opening and closing actions of the medium pump pressure valve. When the first intermediate sub-chamber is under high pressure and the second intermediate sub-chamber is under low pressure, the control valves on one group of obliquely symmetrical branch pipes are closed and the control valves on the other group of obliquely symmetrical branch pipes are opened. When the first intermediate sub-chamber is under low pressure and the second intermediate sub-chamber is under high pressure, the medium pump pressure valve performs the opposite action to ensure that the medium pump and the concentrated brine energy recovery device synchronously control the water flow direction.

[0028] In a preferred embodiment, each fluid medium boosting device is provided with a flow regulating unit, which includes a first flow regulating channel, a second flow regulating channel and a flow direction control valve, wherein the two ends of the first flow regulating channel are respectively connected to the low-pressure inlet area and the variable pressure cavity area of ​​the same fluid medium boosting device, and a first flow regulating one-way valve is provided in the first flow regulating channel; the two ends of the second flow regulating channel are respectively connected to the low-pressure inlet area and the variable pressure cavity area of ​​the same fluid medium boosting device, and a second flow regulating one-way valve is provided in the second flow regulating channel; and the fluid direction of the first flow regulating one-way valve is opposite to the fluid direction of the second flow regulating one-way valve; the flow direction control valve is located in the variable pressure cavity area to control the staggered connection of the first flow regulating channel and the second flow regulating channel.

[0029] In a preferred embodiment, the medium pump circulation device also includes a solar drive component, which includes a photovoltaic support pole and a photovoltaic power generation panel. The photovoltaic support pole is fixed in the seawater environment, and the photovoltaic power generation panel is fixed on the photovoltaic support pole and electrically connected to the medium pump.

[0030] In a preferred embodiment, the medium pump circulation device also includes a wave energy drive component, and the wave energy drive component includes an upper chamber, a lower chamber and a water wheel. The upper chamber is connected to the lower chamber and the upper chamber and the lower chamber are both arranged at the photovoltaic support pole. The upper chamber is provided with a wave energy water inlet one-way valve, and the lower chamber is provided with a wave energy water outlet one-way valve. The water wheel is installed between the upper chamber and the lower chamber. The medium pump is connected to the water wheel. Seawater waves flow into the upper chamber from the wave energy water inlet one-way valve, and drive the water wheel to rotate continuously and then flow out from the wave energy water outlet one-way valve. The rotation of the water wheel drives the medium pump to work.

[0031] The fourth technical solution adopted by the present invention to solve the technical problem is:

[0032] A seawater cooling system employs the fluid medium pressurizing device, wherein the fluid medium is gas. The seawater cooling system further comprises a gas cooling device, which is connected to the fluid medium outlet and the seawater to be cooled. The pressurized gas enters the gas cooling device from the fluid medium outlet, and then enters the seawater to be cooled from the gas cooling device to cool the seawater to be cooled, and is then discharged from the seawater to be cooled in the form of bubbles.

[0033] Compared with the background technology, this technical solution has the following advantages:

[0034] 1. The fluid medium boosting device periodically changes the pressure in the variable pressure cavity area through the pressure regulating component, so that the pressures exerted on the large piston body and the small piston body are different. The piston reciprocates under the action of the pressure difference. When the piston moves toward the low-pressure inlet area, the fluid medium can enter the high-pressure outlet area. When the piston moves toward the high-pressure outlet area, the fluid medium in the high-pressure inlet area is output outward and pressurized, thereby achieving continuous pressurization of the fluid medium. The entire device only requires a small amount of energy to drive the operation of the piston, continuously performing high-intensity pressurization on the fluid medium, eliminating the need for a high-pressure sea medium pump with serious power consumption; at the same time, the structure is not complicated, and does not involve objects that need to be sealed such as hydraulic oil. The overall structure can be designed to be simpler and the cost is lower.

[0035] 2. The piston includes a primary piston and a secondary piston. The secondary piston can serve as a secondary booster for the primary piston. The two pistons are arranged in series to enhance the boosting effect.

[0036] 3. The primary connecting channel is arranged on the primary piston, and the secondary connecting channel is arranged on the secondary piston, which makes the device structure more compact and small, and fully utilizes the internal space.

[0037] 4. The pressure regulating assembly includes a float and a pressure regulating chamber. The float moves up and down following the waves to change the pressure in the pressure regulating chamber. That is, wave energy is used to achieve pressure regulation in the seawater desalination system, making full use of natural resources.

[0038] 5. The pressure regulating assembly includes a power plant warm wastewater discharge culvert, a turbine, and a medium pump connected in sequence. The residual head energy of the power plant warm wastewater can be used for pressure regulation of the seawater desalination system, making rational use of this resource and avoiding resource waste.

[0039] 6. The seawater desalination system includes two fluid medium boosting devices, which share a fluid medium inlet and a fluid medium outlet, and a pressure regulating component. This can greatly simplify the structure of the system and reduce costs.

[0040] The desalination system utilizes energy from photovoltaics, waves, and residual head pressure from warm water discharge to independently or in combination drive pressure-regulating components, providing high-pressure source water for the desalination unit. The desalination technology disclosed in this invention efficiently recycles dispersed energy, eliminating the need for expensive high-pressure seawater pumps, saving electricity and reducing desalination costs, resulting in economical and environmentally friendly solutions.

[0041] 7. The medium pump circulates the seawater in the two variable pressure cavity areas back and forth so that when the piston of one fluid medium boosting device moves toward the low-pressure inlet area, the piston of the other fluid medium boosting device moves toward the high-pressure outlet area, thereby keeping the water volume at the fluid medium inlet and fluid medium outlet stable, thereby improving energy utilization.

[0042] 8. The pressure regulating component also includes a concentrated brine energy recovery device, which can not only provide a pressure signal for the medium pump pressure valve group, but also make full use of the residual energy of the concentrated brine, further improving the energy utilization rate, and allowing the medium pump to complete its work with an ordinary low-pressure medium pump, reducing resource consumption and thus reducing costs.

[0043] 9. The solar drive assembly generates electricity through photovoltaic panels to power the medium pump, thereby improving the utilization of natural resources.

[0044] 10. The wave energy drive assembly generates electricity through the rotation of the water wheel to drive the medium pump to improve the utilization of natural resources.

[0045] 11. The fluid medium booster device can also be used for seawater cooling. The fluid medium is gas. The pressurized gas enters the gas cooling device from the fluid medium outlet, then enters the liquid to be cooled, cooling it. The gas is then discharged from the liquid in the form of bubbles. This air pressure boost can be used to cool warm wastewater, resulting in a more compact system and lower costs compared to conventional warm wastewater cooling devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below with reference to the accompanying drawings and examples.

[0047] Figure 1 A schematic diagram of a seawater desalination system according to a preferred embodiment is shown.

[0048] Figure 2 Draws Figure 1 One of the partially enlarged schematic diagrams.

[0049] Figure 3 Draws Figure 1 The second partial enlarged schematic diagram.

[0050] Figure 4 FIG2 shows an overall schematic diagram of a seawater desalination system according to another preferred embodiment.

[0051] Figure 5 A cross-sectional schematic diagram of a fluid medium pressurizing device according to another preferred embodiment is shown.

[0052] Figure 6 A schematic structural diagram of a concentrated brine energy recovery device according to another preferred embodiment is shown.

[0053] Figure 7 Draws Figure 6 A partial enlarged view of .

[0054] Figure 8 A structural schematic diagram of a medium pump circulation device in another preferred embodiment is depicted.

[0055] Figure 9 A schematic structural diagram of a solar-powered drive component and a wave-powered drive component in another preferred embodiment is shown.

[0056] Figure 10 A cross-sectional schematic diagram of a seawater cooling system according to a preferred embodiment is shown. DETAILED DESCRIPTION

[0057] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "primary", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0058] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0059] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" and "fixed connection" should be understood in a broad sense, that is, any connection method without any displacement relationship or relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0060] When the terms "include", "have" and their variations are used in the claims, description and drawings of the present invention, they are intended to mean "including but not limited to".

[0061] In order to distinguish them easily, Figure 2 The fluid medium pressurizing device in the embodiment is defined as the first fluid medium pressurizing device 100. Figure 3 The fluid medium pressurizing device is defined as a second fluid medium pressurizing device 200 .

[0062] Please refer to Figure 2 , a preferred embodiment of the first fluid medium pressurizing device, the first fluid medium pressurizing device 100 includes a first piston cylinder 110, a first piston and a first pressure regulating assembly.

[0063] The first piston cylinder 110 is provided with a fluid medium inlet 1101 and a fluid medium outlet 1102. Figure 2 As shown, the fluid medium inlet 1101 is located at the bottom end surface of the first piston cylinder 110 , and the fluid medium outlet 1102 is located at the top end of the first piston cylinder 110 .

[0064] The first piston is movably mounted in the first piston cylinder 110 and is located between the fluid medium inlet 1101 and the fluid medium outlet 1102. The first piston includes a large piston body, a small piston body and a piston rod. The two ends of the piston rod are respectively fixed to the large piston body and the small piston body. The outer end surface of the large piston body corresponds to the fluid medium inlet 1101 and a low-pressure inlet area is formed between the large piston body and the piston cylinder body. The outer end surface of the small piston body corresponds to the fluid medium outlet 1102 and a high-pressure outlet area is formed between the small piston body and the piston cylinder body 110. The inner end surface of the large piston body, the inner end surface of the small piston body, the piston cylinder body 110 and the outer peripheral surface of the piston form a variable pressure cavity area.

[0065] In this embodiment, the first piston includes a first-stage piston 130 and a first-stage second-stage piston 140 placed in series and spaced apart from each other. The first-stage piston 130 includes a first-stage large piston body 133, a first-stage small piston body 135 and a first-stage piston rod 134. The first-stage second-stage piston 140 includes a first-stage large piston body 143, a first-stage small piston body 145 and a first-stage second-stage piston rod 144. A first low-pressure inlet area 1122 is formed between the outer end surface of the first-stage large piston body 133 and the first piston cylinder body 110. The first-stage small piston body 135 corresponds to the first-stage large piston body 143. The outer end surface of the first-stage small piston body 145 The first high-pressure outlet area 113 is formed between the end surface and the first piston cylinder 110. The inner end surface of the first-stage large piston body 133, the inner end surface of the first-stage small piston body 135, the first piston cylinder 110, and the outer circumference of the first-stage piston rod 134 form a first-stage variable pressure cavity area 1121. The inner end surface of the first-stage large piston body 143, the inner end surface of the first-stage small piston body 145, the first piston cylinder 110, and the outer circumference of the first-stage piston rod 144 form a first-stage variable pressure cavity area 1162. The first-stage variable pressure cavity area 1121 and the first-stage variable pressure cavity area 1162 are always connected through the first trickle cavity 119. Furthermore, the cross-sectional area of ​​the first-stage small piston body 135 is smaller than the cross-sectional area of ​​the first-stage large piston body 143.

[0066] As needed, the first piston may also include a first-third-stage piston, a first-fourth-stage piston, etc., as long as the cross-sectional area of ​​the large piston body of the previous stage is smaller than the cross-sectional area of ​​the large piston body of the next stage, and the present invention is not limited to this.

[0067] In this embodiment, a first flow channel 118 is arranged between the first low-pressure inlet area 1122 and the first first-stage transformer cavity area 1121. The first flow channel 118 connects the first low-pressure inlet area 1122 with the first first-stage transformer cavity area 1121, and a first control valve 1123 is arranged on the first flow channel 118. When the first piston moves to the extreme position toward the first high-pressure outlet area 113, the first control valve 1123 is triggered to open the first flow channel 118. When the first piston moves to the extreme position toward the first low-pressure inlet area 1122, the first control valve 1123 is triggered to close the first flow channel 118.

[0068] Specifically, the first-stage piston rod 134 is provided with an upper driving portion 1341 and a lower driving portion 1342 spaced apart from each other. When the first-stage piston 130 moves to the top limit position, the lower driving portion 1342 pushes the first control valve 1123 to leave the opening connecting the first flow channel 118 and the first-stage pressure-transforming cavity area 1121, so that the first-stage pressure-transforming cavity area 1121 is connected to the first-stage low-pressure inlet area 1122. When the first-stage piston 130 moves to the bottom limit position, the upper driving portion 1341 pushes the first control valve 1123 to block the opening connecting the first flow channel 118 and the first-stage pressure-transforming cavity area 1121, so that the first-stage pressure-transforming cavity area 1121 is disconnected from the first-stage low-pressure inlet area 1122. Figure 2 As shown, the upper driving part 1341 and the lower driving part 1342 are both L-shaped rods, and the two are arranged symmetrically. The first control valve 1123 is located between the vertical section of the upper driving part 1341 and the vertical section of the lower driving part 1342.

[0069] A connecting channel is provided between the first low-pressure inlet area 1122 and the first high-pressure outlet area 113, which connects the first low-pressure inlet area 1122 with the first high-pressure outlet area 113, and a connecting channel one-way valve is provided at the connecting channel to allow the fluid medium of the first low-pressure inlet area 1122 to flow into the first high-pressure inlet area 113.

[0070] In this embodiment, the connecting channel includes a first-level connecting channel 131 and a first-level connecting channel 141. The first-level connecting channel 131 passes through the first-level piston 130 from top to bottom and connects the first low-pressure inlet area 1122 and the gap between the first-level small piston body 135 and the first-level large piston body 143. The first-level connecting channel 141 passes through the first-level piston 140 from top to bottom and connects the gap 1162 between the first-level small piston body 135 and the first-level large piston body 143 and the first high-pressure outlet area 113. The first-level connecting channel 131 is provided with a first-level connecting channel one-way valve 132, and the first-level connecting channel 141 is provided with a first-level connecting channel one-way valve 142. Figure 2 As shown, the first primary connecting channel one-way valve 132 is located at the top of the first primary connecting channel 131 , and the first secondary connecting channel one-way valve 142 is located at the top of the first secondary connecting channel 141 .

[0071] Alternatively, as needed, the connecting channel can be directly provided outside the first piston cylinder 110 , but is not limited thereto.

[0072] The first pressure regulating component can periodically change the pressure in the variable pressure cavity area, so that the pressures exerted on the large piston body and the small piston body are different. The first piston reciprocates under the action of the pressure difference. When the first piston moves toward the low-pressure inlet area 1122, the fluid medium can enter the high-pressure outlet area 113. When the first piston moves toward the first high-pressure outlet area 113, the fluid medium in the first high-pressure inlet area 113 is output outward and pressurized, thereby achieving continuous pressurization of the fluid medium.

[0073] In this embodiment, the first pressure regulating assembly includes a float 120 and a pressure regulating chamber 111 which is arranged in the piston cylinder 110 and is always connected to the first-stage pressure-changing cavity area 1121. The float 120 can float on the sea surface and can float up and down with the waves. The bottom end of the float 120 extends into the pressure regulating chamber 111. The float 120 floats up and down to periodically change the pressure in the first-stage pressure-changing cavity area 1121.

[0074] In this embodiment, the pressure regulating chamber 111 is provided with a pressure regulating water outlet 114 connected to the seawater, and a pressure regulating one-way valve 115 is provided at the pressure regulating water outlet 114 for allowing the seawater in the pressure regulating chamber 111 to flow out.

[0075] Please refer to Figure 3 , which is a preferred embodiment of the second fluid medium pressurizing device.

[0076] In this embodiment, the second fluid medium pressurizing device 200 includes a second piston-cylinder body 210 , a second piston and a second pressure regulating assembly 230 .

[0077] In this embodiment, the second piston includes a second-stage piston 220 and a second-stage piston 240 placed in series and spaced apart from each other. The second-stage piston 220 includes a second-stage large piston body 223, a second-stage small piston body 225, and a second-stage piston rod 224. The second-stage piston 240 includes a second-stage large piston body 243, a second-stage small piston body 245, and a second-stage piston rod 244. A second low-pressure inlet area 2111 is formed between the outer end surface of the second-stage large piston body 243 and the second piston cylinder body 210. The second-stage small piston body 225 corresponds to the second-stage large piston body 243. The second-stage small piston body 245 corresponds to the second-stage large piston body 243. The second high-pressure outlet area is formed between the outer end surface of the second-stage large piston body 223 and the second-stage small piston body 225, the second piston cylinder body 210, and the outer circumference of the second-stage piston rod 224. The second-stage variable pressure cavity area 2112 is formed between the inner end surface of the second-stage large piston body 243, the inner end surface of the second-stage small piston body 245, the second piston cylinder body 210, and the outer circumference of the second-stage piston rod 244. The second-stage variable pressure cavity area 2112 and the second-stage variable pressure cavity area 2131 are always connected via the second trickle cavity 214. Furthermore, the cross-sectional area of ​​the second-stage small piston body 225 is smaller than that of the second-stage large piston body 243.

[0078] In this embodiment, a second flow channel 2115 is arranged between the second low-pressure inlet area 2111 and the second first-stage transformer cavity area 2112. The second flow channel 2115 connects the second low-pressure inlet area 2111 with the second first-stage transformer cavity area 2112, and a second control valve 2113 is arranged on the second flow channel 2115. When the second piston moves to the extreme position toward the second high-pressure outlet area 212, the second control valve 2113 is triggered to open the second flow channel 2115. When the second piston moves to the extreme position toward the second low-pressure inlet area 2111, the second control valve 2113 is triggered to close the second flow channel 2115.

[0079] In this embodiment, the second pressure regulating component includes a power station warm wastewater discharge culvert 231, a turbine 232 and a medium pump 233 connected in sequence. The medium pump 233 is connected to the second first-stage transformer cavity area 2112 through a drainage channel 2116. The medium pump 233 provides negative pressure for the second first-stage transformer cavity area 2112, and a switch valve 2114 is provided at the drainage channel 2116. When the second piston moves toward the second high-pressure outlet area 212 to the extreme position, the switch valve 2114 is triggered to close the drainage channel 2116. When the second piston moves toward the second low-pressure inlet area 2111 to the extreme position, the switch valve 2114 is triggered to open the drainage channel 2116.

[0080] In this embodiment, an upper left driving part 2241 and a lower left driving part 2242 are provided on the left side of the second-level piston rod 224, and an upper right driving part 2243 and a lower right driving part 2244 are provided on the right side of the second-level piston rod 224, which are arranged at intervals up and down; the second control valve 2113 is located between the upper left driving part 2241 and the lower left driving part 2242, and the switch valve 2114 is located between the upper right driving part 2243 and the lower right driving part 2244.

[0081] In this embodiment, the opening where the second flow passage 2115 communicates with the second primary transformer cavity area 2112 and the opening where the drainage passage 2116 communicates with the second primary transformer cavity area 2112 are staggered.

[0082] When the second-stage piston 220 is located at the upper extreme position, the second control valve 2113 opens the second flow channel 2115 and the opening connected to the second-stage transformer cavity area 2112, and the switch valve 2114 closes the drainage channel 2116 and the opening connected to the second-stage transformer cavity area 2112; when the second-stage piston 220 is located at the lower extreme position, the second control valve 2113 closes the second flow channel 2115 and the opening connected to the second-stage transformer cavity area 2112, and the switch valve 2114 opens the drainage channel 2116 and the opening connected to the second-stage transformer cavity area 2112.

[0083] In this embodiment, the connecting channel includes a second primary connecting channel 221 and a second secondary connecting channel 241. The second primary connecting channel 221 runs through the second primary piston 220 vertically and communicates with the second low-pressure inlet area 2111 and the gap 2131 between the second primary small piston body 225 and the second secondary large piston body 243. The second secondary connecting channel 241 runs through the second secondary piston 240 vertically and communicates with the gap 2131 between the second primary small piston body 225 and the second secondary large piston body 243 and the second high-pressure outlet area 212. The second primary connecting channel 221 is provided with a second primary connecting channel one-way valve 222, and the second secondary connecting channel 241 is provided with a second secondary connecting channel one-way valve 242. Figure 3 As shown, the second primary connecting channel one-way valve 222 is located at the top of the second primary connecting channel 221 , and the second secondary connecting channel one-way valve 242 is located at the top of the second secondary connecting channel 241 .

[0084] Please refer to Figure 1, a preferred embodiment of a seawater desalination system, employing the aforementioned fluid medium pressurizing device, comprises a reverse osmosis desalination system and a first fluid medium pressurizing device 100 and a second fluid medium pressurizing device 200. The fluid medium is seawater. The reverse osmosis desalination system is provided with a high-pressure seawater inlet 8. The low-pressure inlet areas 1122 and 2111 are connected to the seawater, and the high-pressure outlet areas 113 and 212 are connected to the high-pressure seawater inlet 8. As needed, the seawater desalination system may include only one of the two fluid medium pressurizing devices, but is not limited thereto.

[0085] A high-pressure storage tank 1 is also provided at the front end of the reverse osmosis desalination device. The high-pressure source seawater inlet 8 is located at the top of the high-pressure storage tank 1, and a tank check valve 7 is provided at the bottom of the high-pressure storage tank 1. The first high-pressure outlet area 113 of the first fluid medium boosting device 100 is connected to the high-pressure source seawater inlet 8 via a first boosting pipe 2, and the high-pressure outlet area of ​​the second fluid medium boosting device is connected to the high-pressure source seawater inlet 8 via a second boosting pipe 4. A three-way structure is formed between the first boosting pipe 2, the second boosting pipe 4, and the high-pressure source seawater inlet 8. In addition, a first boosting check valve 3, a second boosting check valve 5, and an inlet check valve 6 are provided at the head end of the first boosting pipe 2, the head end of the second boosting pipe 4, and the high-pressure source seawater inlet 8, respectively.

[0086] The first piston cylinder 110 of the first fluid medium pressurizing device 100 is fixed below the sea surface, and the second piston cylinder 210 of the second fluid medium pressurizing device 200 can be fixed on the ground or below the sea surface.

[0087] First, the working principle of the first fluid medium pressurizing device 100 is described:

[0088] When the buoy 120 moves upward with the waves, the pressure-regulating one-way valve 115 closes and negative pressure forms in the pressure-regulating chamber 111. Since the pressure-regulating chamber 111 is always connected to the first-stage pressure-changing cavity 1121, negative pressure also forms in the first-stage pressure-changing cavity 1121, causing the first-stage piston 130 to move upward under the action of the pressure difference. The first-stage pressure-changing cavity 1121 is connected to the first-stage pressure-changing cavity 1162 through the first trickle cavity 119, causing negative pressure to form in the first-stage pressure-changing cavity 1162, causing the first-stage piston 140 to move upward under the action of the pressure difference.

[0089] Then, when the first-stage piston 130 moves upward to the limit position, the pressure in the first high-pressure outlet area 113 reaches the maximum, and the seawater in the first high-pressure outlet area 113 opens the first boost check valve 3 and the inlet boost check valve 6 to pressurize the seawater into the high-pressure storage tank 1. At the same time, the lower drive unit 1142 pushes the first control valve 1123 upward. The first control valve 1123 is opened, and the first-stage transformer cavity area 1121 is connected to the first low-pressure inlet area 1122. The pressure in the first-stage transformer cavity area 1121 is equal to the pressure in the first low-pressure inlet area 1122. Seawater flows from the first low-pressure inlet area 1122 through the first-stage transformer cavity area 1121 to fill the pressure regulating chamber 111 and the first-secondary transformer cavity area 1162. If the float 120 is still at the high position of the waves at this time, the seawater will fill the first-stage transformer cavity area 1121, the pressure regulating chamber 111, and the first-secondary transformer cavity area 1162.

[0090] When the buoy 120 moves downward with the waves, the pressure-regulating one-way valve 115 opens and the seawater in the pressure-regulating chamber 111 can be discharged from the pressure-regulating one-way valve 115. The first-stage piston 130 moves downward under the action of its own weight and the gravity of the seawater in the first-stage variable pressure cavity area 1121, so that the external seawater enters the gap 1161 between the first-stage piston 130 and the first-stage piston 121 after passing through the first-stage connecting channel 131 and the first-stage connecting channel one-way valve 132 from the first low-pressure inlet area 1122. The first-stage piston 140 moves downward under the action of its own weight and the gravity of the seawater in the first-stage variable pressure cavity area 1162. The seawater in the gap 1161 between the first-stage piston 130 and the first-stage piston 140 passes through the first-stage connecting channel 141 and the first-stage connecting channel one-way valve 142 and enters the first high-pressure outlet area 113.

[0091] When the first-stage piston 130 and the first-stage second-stage piston 140 move downward to the extreme position, the first control valve 1123 moves downward and is closed under the action of the upper drive part 1342, the first-stage transformer cavity area 1121 is disconnected from the first low-pressure inlet area 1122, the pressure regulating one-way valve 115 is closed, and the outside seawater cannot enter the pressure regulating chamber 111, waiting for the float 120 to float again, and repeating the above actions.

[0092] The working principle of the second supercharging device 200 is as follows:

[0093] The second pressure regulating assembly 230 provides a constant negative pressure;

[0094] When the second-stage piston 220 is at the extreme position at the top, the pressure in the second high-pressure outlet area 212 reaches the maximum, and the seawater in the second high-pressure outlet area 212 passes through the second boosting check valve 5 and the inlet boosting check valve 6 and enters the storage tank 1; at the same time, the second control valve 2113 is opened by the push of the lower left drive part 2242, and the switch valve 2114 is closed by the push of the lower right drive part 2244, the second-stage transformer cavity area 2112 is disconnected from the medium pump 233 and connected to the second low-pressure inlet area 2111, and the second-stage transformer cavity area 2112 is always connected to the second-stage transformer cavity area 2131, the second low-pressure inlet area 2111 and the second-stage transformer cavity area 2112 maintain the same pressure, and the seawater in the second low-pressure inlet area 2111 enters the second-stage transformer cavity area 2112 The seawater in the second-first pressure transformation cavity area 2112 passes through the second trickle cavity 214 and enters the second-second pressure transformation cavity area 2131. The second-first piston 220 moves downward under the action of its own weight and the gravity of the seawater in the second-first pressure transformation cavity area 2112. The second-second piston 240 moves downward under the action of its own weight and the gravity of the seawater in the second-second pressure transformation cavity area 2131. During the downward movement of the second-first piston 220, the seawater in the second low-pressure inlet area 2111 passes through the second-first connecting channel 221 and enters the gap 2132 between the second-first piston 220 and the second-second piston 240. During the downward movement of the second-second piston 240, the seawater in the gap 2132 between the second-first piston 220 and the second-second piston 240 passes through the second-second connecting channel 241 and enters the second high-pressure outlet area 212.

[0095] When the second-stage piston 220 moves downward to the bottom limit position, the second control valve 2113 is closed by the upper left driving part 2241, and the switch valve 2114 is opened by the upper right driving part 2243. The second-stage pressure-transforming cavity area 2112 is connected to the medium pump 233, and the second-stage pressure-transforming cavity area 2112 is disconnected from the second low-pressure inlet area 2111. The medium pump 233 provides negative pressure to the second-stage pressure-transforming cavity area 2112, and the second-stage pressure-transforming cavity area 2131 also forms a negative pressure. The second-stage piston 220 and the second-stage piston 240 move upward under the action of the pressure difference until both the second-stage piston 220 and the second-stage piston 240 are at the upper limit position. At this time, the pressure in the second high-pressure outlet area 212 reaches the maximum, and the seawater in the second high-pressure outlet area 212 passes through the second boosting check valve 5 and the inlet boosting check valve 6 and enters the storage tank 1. The above action is repeated.

[0096] Please refer to Figures 4 to 9 , is another preferred embodiment of the seawater desalination system, which uses a fluid medium pressurizing device, and the fluid medium is seawater.

[0097] like Figure 4 As shown, the seawater desalination system includes two fluid medium boosting devices, which can share a fluid medium inlet and a fluid medium outlet, or can each independently set a fluid medium inlet and a fluid medium outlet, and the two fluid medium boosting devices share a pressure regulating component.

[0098] In order to distinguish them easily, Figure 4 The two fluid medium pressurizing devices in the embodiment are defined as the third fluid medium pressurizing device 300, specifically as follows Figure 5 As shown, the structure of the third fluid medium pressurizing device 300 is substantially the same as that of the first fluid medium pressurizing device 100, and includes:

[0099] The third fluid medium pressurizing device 300 includes a third piston cylinder 310 , a third piston and a third pressure regulating assembly.

[0100] In this embodiment, the third piston includes a third-level piston 320 and a third-level piston 330 placed in series and spaced apart from each other. The third-level piston 320 includes a third-level large piston body 321, a third-level small piston body 322 and a third-level piston rod 323. The third-level piston 330 includes a third-level large piston body 331, a third-level small piston body 332 and a third-level piston rod 333. A third low-pressure inlet area 324 is formed between the outer end surface of the third-level large piston body 321 and the third piston cylinder body 310. The third-level small piston body 322 is spaced apart from the third-level large piston body 331. Correspondingly, the third high-pressure outlet area 340 is formed between the outer end surface of the third-secondary small piston body 332 and the third piston cylinder body 310. The third-first pressure-changing cavity area 325 is formed between the inner end surfaces of the third-first-large piston body 321, the inner end surfaces of the third-first-small piston body 322, and the third piston cylinder body 310. The third-second pressure-changing cavity area 334 is formed between the inner end surfaces of the third-secondary large piston body 331, the inner end surfaces of the third-secondary small piston body 332, and the third piston cylinder body 310. The third-first pressure-changing cavity area 325 and the third-second pressure-changing cavity area 334 are always connected via the third trickle cavity 335. Furthermore, the cross-sectional area of ​​the third-first-small piston body 322 is smaller than that of the third-secondary large piston body 331.

[0101] In this embodiment, Figure 4 and Figure 8 As shown, the pressure regulating assembly includes a medium pump circulation device.

[0102] The medium pump circulation device includes a medium pump circulation pipe 400 and a medium pump 410. The two ends of the medium pump circulation pipe are respectively connected to the variable pressure cavity areas of the two fluid medium boosting devices. The medium pump circulation device causes the seawater in the variable pressure cavity area of ​​one fluid medium boosting device to flow to the variable pressure cavity area of ​​the other fluid medium boosting device, and then flows back to the variable pressure cavity area of ​​the original fluid medium boosting device, repeating the cycle so that when the piston of one fluid medium boosting device moves toward the low-pressure inlet area, the piston of the other fluid medium boosting device moves toward the high-pressure outlet area, thereby maintaining the pressure and water volume of the fluid medium inlet and the fluid medium outlet stable.

[0103] In this embodiment, there are two medium pump circulation pipes 400, which are respectively connected to the variable pressure cavity areas of the two fluid medium boosting devices. A bypass pipe 411 is arranged between the two pipes. The bypass pipe 411 divides the two medium pump circulation pipes into four symmetrically arranged branches. A medium pump pressure valve is installed on each branch pipe, and the medium pump 410 is installed on the bypass pipe 411. When the medium pump 410 is working, the combined action of the medium pump pressure valve changes the flow direction of the water between the variable pressure cavity areas of the two fluid medium boosting devices.

[0104] Specifically, the medium pump medium pump medium pump said medium pump pressure valve group includes four medium pump pressure valves, namely a first medium pump pressure valve 420, a second medium pump pressure valve 430, a third medium pump pressure valve 440 and a fourth medium pump pressure valve 450.

[0105] The medium pump circulation device has two water flow directions, one of which is Figure 4 The seawater in the third-level pressure transformation cavity area 325 on the left side of the middle flows through the second medium pump pressure valve 430, the medium pump 410 and the third medium pump pressure valve 440 and then flows into the third-level pressure transformation cavity area 325 on the right side; the second is that the seawater in the third-level pressure transformation cavity area 325 on the right side flows through the fourth medium pump pressure valve 450, the medium pump 410 and the first medium pump pressure valve 420 and then flows into the third-level pressure transformation cavity area 325 on the left side.

[0106] In this embodiment, Figure 4 and Figure 6 、 Figure 7 As shown, the pressure regulating assembly also includes a brine energy recovery device, which recovers the residual energy of brine from the seawater desalination system and provides additional power for the flow of water between the pressure-changing cavity areas of the two fluid medium boosting devices.

[0107] Specifically, such as Figure 6 、 Figure 7The concentrated brine energy recovery device shown in the figure includes an energy recovery cylinder 500 and an energy recovery piston 510, wherein the energy recovery piston 510 is movably mounted in the energy recovery cylinder 500, and the energy recovery piston 510 divides the space in the energy recovery cylinder 500 into a first connecting chamber 520, an intermediate chamber 530, and a second connecting chamber 540 that are not connected to each other, wherein the first connecting chamber 520 and the second connecting chamber 540 are respectively connected to the third-stage pressure-changing cavity area 325 of the two fluid medium boosting devices; a partition 531 is provided in the intermediate chamber 530, and the partition 531 divides the intermediate chamber 530 into a first intermediate sub-chamber 532 and a second intermediate sub-chamber 533 that are not connected to each other, wherein the first intermediate sub-chamber 532 is provided with a first concentrated brine inlet I1 and a first concentrated brine outlet O1, and the second intermediate sub-chamber 533 is provided with a second concentrated brine inlet I 2 and the second concentrated brine outlet O2, and an intermediate chamber control valve 550 is provided in the intermediate chamber 530. The pressure signals of the first intermediate sub-chamber 532 and the second intermediate sub-chamber 533 trigger the opening and closing actions of the medium pump pressure valve. When the first intermediate sub-chamber 532 is under high pressure and the second intermediate sub-chamber 533 is under low pressure, the medium pump pressure valves on one group of obliquely symmetrical branch pipes are closed, and the control valves on the other group of obliquely symmetrical branch pipes are opened. When the first intermediate sub-chamber 532 is under low pressure and the second intermediate sub-chamber 533 is under high pressure, the medium pump pressure valves perform the opposite actions to ensure that the medium pump and the concentrated brine energy recovery device synchronously control the water flow direction.

[0108] Specifically, the intermediate cavity control valve 550 can control the first concentrated brine outlet O1 and the second concentrated brine inlet I2 to be opened at the same time and the first concentrated brine inlet I1 and the second concentrated brine outlet O2 to be closed at the same time. Figure 6 As shown, at this time, when the pressure of the second intermediate sub-chamber 533 is in a high pressure state and the pressure of the first intermediate sub-chamber 532 is in a low pressure state, the second medium pump pressure valve 430 and the third medium pump pressure valve 440 can be controlled to open, and the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420 can be controlled to close, so that the seawater in the third primary pressure transformation cavity area 325 on the left can enter the third primary pressure transformation cavity area 325 on the right. The intermediate cavity control valve 550 can also control the first concentrated brine outlet O1 and the second concentrated brine inlet I2 to be closed at the same time and the first concentrated brine inlet I1 and the second concentrated brine outlet O2 to be opened at the same time, as shown in FIG. Figure 7 As shown, at this time, the pressure of the first intermediate sub-chamber 532 is in a high-pressure state and the pressure of the second intermediate sub-chamber 533 is in a low-pressure state. The second medium pump pressure valve 430 and the third medium pump pressure valve 440 can be controlled to be closed, and the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420 can be controlled to be open, so that the seawater in the third-level pressure transformation cavity area 325 on the right can enter the third-level pressure transformation cavity area 325 on the left.

[0109] In this embodiment, the first concentrated brine inlet I1 and the first concentrated brine outlet O1 as well as the second concentrated brine inlet I2 and the second concentrated brine outlet O2 are arranged side by side and are respectively located on both sides of the partition 531. The intermediate cavity control valve 550 includes a valve stem 551 and a first valve block 552 and a second valve block 553 respectively fixed to both ends of the valve stem 551. The valve stem 551 is movably connected to the partition 531. The two side walls of the energy recovery piston are respectively provided with a first top block 554 and a second top block 555. When the energy recovery piston moves to the extreme position on the left, the second top block 555 presses against the valve stem so that the second valve block 553 blocks the second concentrated brine outlet O2 and the first valve block 552 blocks the first concentrated brine inlet I1. Figure 6 When the energy recovery piston moves to the right limit position, the first top block 554 abuts the valve stem 551 so that the first valve block 552 blocks the first brine outlet O1, the second valve block 553 blocks the second brine inlet I 2, as shown Figure 7 shown.

[0110] In this embodiment, each third fluid medium boosting device is provided with a flow regulating unit, which includes a first flow regulating channel 326, a second flow regulating channel 328 and flow direction control valves 327 and 329. The two ends of the first flow regulating channel 326 are respectively connected to the third low-pressure inlet area 324 and the third first-stage pressure-changing cavity area 325 of the same third fluid medium boosting device 300, and a first flow regulating one-way valve 3261 is provided in the first flow regulating channel 326; the second flow regulating channel 328 is connected to the third low-pressure inlet area 324 and the third first-stage pressure-changing cavity area 325 of the same third fluid medium boosting device 300. 8 The two ends are respectively connected to the third low-pressure inlet area 324 and the third first-stage pressure-changing cavity area 325 of the same third fluid medium boosting device, and a second flow regulating one-way valve 3281 is provided in the second flow regulating channel 328; and the fluid direction of the first flow regulating one-way valve 3261 is opposite to the fluid direction of the second flow regulating one-way valve 3281; the flow direction control valves 327 and 329 are located in the third first-stage pressure-changing cavity area 325 to control the staggered connection of the first flow regulating channel 326 and the second flow regulating channel 328.

[0111] In this embodiment, the flow control valves 327 and 329 include a first flow control valve 327 and a second flow control valve 329. The first flow control valve 327 cooperates with the outlet of the first flow control channel 326, and the second flow control valve 329 cooperates with the inlet of the second flow control channel 328. When the third piston moves toward the third high-pressure outlet region 340 to its limit position, the first flow control valve 327 is triggered to open the first flow control channel 326, and the second flow control valve 329 is triggered to close the second flow control channel 328. When the third piston moves toward the third low-pressure inlet region 324 to its limit position, the first flow control valve 327 is triggered to close the first flow control channel 326, and the second flow control valve 329 is triggered to open the second flow control channel 328.

[0112] In this embodiment, Figure 9 As shown, the medium pump circulation device also includes a solar drive component, which includes a photovoltaic support rod 600 and a photovoltaic power generation panel 610. The photovoltaic support rod 600 is fixed in the seawater environment, and the photovoltaic power generation panel 610 is fixed on the photovoltaic support rod 600 and electrically connected to the medium pump 410.

[0113] In this embodiment, the medium pump circulation device also includes a wave energy drive component, which includes an upper chamber 710, a lower chamber 720 and a water wheel 730. The upper chamber 710 is connected to the lower chamber 720, and the upper chamber 710 is provided with a wave energy water inlet check valve 711. The lower chamber 720 is provided with a wave energy water outlet check valve 721. The water wheel 730 is installed between the upper chamber 710 and the lower chamber 720. The medium pump 410 is connected to the water wheel 730. Seawater waves flow into the upper chamber 710 from the wave energy water inlet check valve 711 and drive the water wheel 730 to rotate continuously and then flow out from the wave energy water outlet check valve 721. The electrical energy generated by the rotation of the water wheel 730 is used to drive the medium pump 410 to work.

[0114] In order to ensure a compact structure and save costs, the upper chamber 710 and the lower chamber 720 are both arranged at the photovoltaic support pole 600 .

[0115] As needed, multiple wave energy drive components can be provided, and multiple wave energy drive components can be used in combination, with the upper chambers 710 and the lower chambers 720 all connected.

[0116] The working principle of the seawater desalination system is:

[0117] After seawater enters the third low-pressure inlet area 324, if the third-stage piston 320 on the right side moves upward, the third-stage piston 320 on the left side is in a downward moving state, and vice versa, if the third-stage piston 320 on the right side moves downward, the third-stage piston 320 on the left side is in an upward moving state.

[0118] Taking the third-stage piston 320 on the right side moving upward and the third-stage piston 320 on the left side moving downward as an example, at this time, the second medium pump pressure valve 430 and the third medium pump pressure valve 440 are closed, and the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420 are opened, so that the seawater in the third-stage pressure-changing cavity area 325 on the right side flows through the second medium pump pressure valve 430, the medium pump 410 and the third medium pump pressure valve 440 and then flows into the third-stage pressure-changing cavity area 325 on the left; and the first concentrated brine inlet I1 and the second concentrated brine outlet O2 are in the open state, and the first concentrated brine inlet I1 and the second concentrated brine outlet O2 are in the open state. The brine outlet O1 and the second concentrated brine inlet I2 are in a closed state. The remaining concentrated brine can enter the first intermediate sub-chamber 532 from the first concentrated brine inlet I1, driving the energy recovery piston 510 to move to the left. Then, the concentrated brine in the second intermediate sub-chamber 533 can flow out from the second concentrated brine outlet O2, and the seawater in the first connecting chamber 520 flows into the third-stage transformer cavity area 325 on the left under the pressure of the energy recovery piston 510, and the seawater in the third-stage transformer cavity area 325 on the right enters the second connecting chamber 540 until the energy recovery piston 510 moves to the extreme position on the left. Figure 6 As shown, the second abutment block 555 abuts the intermediate chamber control valve 550, causing the second valve block 553 to block the second concentrated brine outlet O2 and the first valve block 552 to block the first concentrated brine inlet I1. At this point, the pressure in the second intermediate sub-chamber 533 reaches its maximum, generating a control signal that is transmitted to the medium pump circulation device to control the opening of the second medium pump pressure valve 430 and the third medium pump pressure valve 440, and the closing of the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420. This allows the seawater in the third primary pressure-transformation cavity 325 on the left to flow through the second medium pump pressure valve 430, the medium pump 410, and the third medium pump pressure valve 440 before flowing into the third primary pressure-transformation cavity 325 on the right. When the energy recovery piston 510 moves to its left limit position, the third piston on the right moves upward to its limit position, while the third piston on the left moves downward to its limit position.

[0119] Then, the remaining concentrated brine can enter the second intermediate sub-chamber 533 from the second concentrated brine inlet I2, driving the energy recovery piston 510 to move to the right. Then, the concentrated brine in the first intermediate sub-chamber 532 flows out from the first concentrated brine outlet O1, and the seawater in the third-stage transformer cavity area 325 on the left side flows into the first connecting cavity 520 under the pressure of the energy recovery piston 510, and the seawater in the second connecting cavity 540 enters the third-stage transformer cavity area 325 on the right side, until the energy recovery piston 510 moves to the right limit position, as shown in FIG. Figure 7As shown, the first abutment block 554 abuts the intermediate chamber control valve 550, causing the first valve block 552 to block the first concentrated brine outlet O1 and the second valve block 552 to block the second concentrated brine inlet I2. At this point, the pressure in the second intermediate sub-chamber 533 reaches its minimum, generating a control signal that is transmitted to the medium pump circulation device to control the closing of the second medium pump pressure valve 430 and the third medium pump pressure valve 440, and the opening of the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420. This allows seawater in the third primary pressure-transformation cavity area 325 on the right side to flow through the fourth medium pump pressure valve 450, the medium pump 410, and the first medium pump pressure valve 420, before flowing into the third primary pressure-transformation cavity area 325 on the left side. When the energy recovery piston 510 moves to the right limit position, the third piston on the left side moves upward to its limit position, while the third piston on the right side moves downward to its limit position.

[0120] This cycle is repeated to keep the water volume in the third low-pressure inlet area 324 and the water volume in the third high-pressure outlet area 340 balanced, thereby improving energy utilization.

[0121] Please refer to Figure 10 , which is yet another embodiment of the seawater desalination system.

[0122] The seawater cooling system uses the fluid medium pressurizing device, and the fluid medium is gas, such as air. Figure 4 The structure of the seawater desalination system shown in FIG. 1 can be replaced with gas by replacing the fluid medium. The seawater cooling system further includes a gas cooling device 620, which is connected to the fluid medium outlet and the seawater to be cooled. The pressurized gas enters the gas cooling device 620 from the fluid medium outlet, and then enters the seawater to be cooled 630 from the gas cooling device 620 to cool the seawater to be cooled 630, and is then discharged from the seawater to be cooled 630 in the form of bubbles.

[0123] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. Fluid medium pressurizing device, characterized in that: The booster device comprises: A piston cylinder body, wherein the piston cylinder body is provided with a fluid medium inlet and a fluid medium outlet; A piston is movably mounted in a piston cylinder and is located between a fluid medium inlet and a fluid medium outlet. The piston comprises a large piston body, a small piston body, and a piston rod. Both ends of the piston rod are respectively fixedly connected to the large piston body and the small piston body. An outer end surface of the large piston body corresponds to the fluid medium inlet, and a low-pressure inlet area is formed between the large piston body and the piston cylinder body. An outer end surface of the small piston body corresponds to the fluid medium outlet, and a high-pressure outlet area is formed between the small piston body and the piston cylinder body. A variable-pressure cavity area is enclosed by the inner end surface of the large piston body, the inner end surface of the small piston body, the piston cylinder body, and the outer peripheral surface of the piston rod. The pressure regulating component can provide negative pressure to the variable pressure cavity area, periodically changing the pressure in the variable pressure cavity area, so that the pressures on the large piston body and the small piston body are different. The piston reciprocates under the action of the pressure difference. When the piston moves toward the low-pressure inlet area, the fluid medium can enter the high-pressure outlet area. When the piston moves toward the high-pressure outlet area, the fluid medium in the high-pressure outlet area is output outward and pressurized, thereby achieving continuous pressurization of the fluid medium; The pressure regulating assembly includes a float and a pressure regulating chamber arranged in a piston cylinder and always connected to the pressure-changing cavity area. The piston cylinder is fixed below the sea surface, and the float floats on the sea surface and can float up and down with the waves. The bottom end of the float extends into the pressure regulating chamber, and the float floats up and down to periodically change the pressure in the pressure-changing cavity area.

2. The fluid medium pressurizing device according to claim 1, characterized in that: The piston includes a first-level piston and a second-level piston placed in series, the first-level piston includes a first-level large piston body, a first-level small piston body and a first-level piston rod, the second-level piston includes a second-level large piston body, a second-level small piston body and a second-level piston rod, a low-pressure inlet area is formed between the outer end surface of the first-level large piston and the piston cylinder body, the first-level small piston body corresponds to the second-level large piston body, and a high-pressure outlet area is formed between the outer end surface of the second-level small piston and the piston cylinder body; a first-level pressure-changing cavity area is formed between the inner end surface of the first-level large piston, the inner end surface of the first-level small piston and the piston cylinder body, a second-level pressure-changing cavity area is formed between the inner end surface of the second-level large piston, the inner end surface of the second-level small piston and the piston cylinder body, and the first-level pressure-changing cavity area is connected to the second-level pressure-changing cavity area.

3. The fluid medium pressurizing device according to claim 2, characterized in that: The cross-sectional area of ​​the first-stage small piston body is smaller than the cross-sectional area of ​​the second-stage large piston body.

4. The fluid medium pressurizing device according to claim 1, 2 or 3, characterized in that: A flow channel is provided between the low-pressure inlet area and the transformer cavity area, which connects the low-pressure inlet area with the transformer cavity area, and a control valve is provided on the flow channel. When the piston moves toward the high-pressure outlet area to the extreme position, the control valve is triggered to open the flow channel. When the piston moves toward the low-pressure inlet area to the extreme position, the control valve is triggered to close the flow channel.

5. The fluid medium pressurizing device according to claim 3, characterized in that: A connecting channel is provided between the low-pressure inlet area and the high-pressure outlet area, which connects the low-pressure inlet area with the high-pressure outlet area, and a connecting channel one-way valve is provided at the connecting channel to allow the fluid medium of the low-pressure inlet area to flow into the high-pressure outlet area.

6. The fluid medium pressurizing device according to claim 5, characterized in that: The connecting channel includes a primary connecting channel and a secondary connecting channel. The primary connecting channel runs through the primary piston from top to bottom and connects the low-pressure inlet area and the gap between the primary small piston body and the secondary large piston body. The secondary connecting channel runs through the secondary piston from top to bottom and connects the gap between the primary small piston body and the secondary large piston body and the high-pressure outlet area. The primary connecting channel is provided with a primary connecting channel one-way valve, and the secondary connecting channel is provided with a secondary connecting channel one-way valve.

7. A seawater desalination system using the fluid medium pressurizing device according to any one of claims 1 to 6, characterized in that: The seawater desalination system includes a reverse osmosis desalination device and a fluid medium pressurizing device, wherein the fluid medium is seawater. The reverse osmosis desalination device is provided with a high-pressure source seawater inlet, the low-pressure inlet area is connected to the seawater, and the high-pressure outlet area is connected to the high-pressure source seawater inlet.

8. The seawater desalination system according to claim 7, characterized in that: The pressure regulating chamber is provided with a pressure regulating water outlet hole connected to the seawater, and a pressure regulating one-way valve for allowing the seawater in the pressure regulating chamber to flow out is provided at the pressure regulating water outlet hole.

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