CN115263706A - Fluid medium supercharging device, seawater desalination system and seawater cooling system - Google Patents

Abstract

The invention discloses a fluid medium supercharging device, a seawater desalination system and a seawater cooling system, wherein the seawater desalination system can use two fluid medium supercharging devices, the two fluid medium supercharging devices share a fluid medium inlet and a fluid medium outlet, the two fluid medium supercharging devices share a pressure regulating assembly, and the pressure regulating assembly can drive the pressure regulating assembly to work in an independent or mutually combined mode by utilizing the energy of photovoltaic or wave, so that high-pressure source water is provided for the seawater desalination device. The seawater desalination technology disclosed by the invention can realize the efficient recycling of the dispersed energy, saves a high-pressure seawater medium pump with high manufacturing cost, saves electric energy, reduces the seawater desalination cost, and is economic and environment-friendly.

Description

Fluid medium supercharging device, seawater desalination system and seawater cooling system

Technical Field

The invention relates to a fluid medium supercharging device, a seawater desalination system and a seawater cooling system.

Background

At present, nuclear power stations are generally built at seasides, the sea is used as a final hot well, and because a plurality of seaside plants lack enough fresh water, seawater desalination is often used as an important mode for obtaining the fresh water required by the construction and the operation of the nuclear power stations, and particularly, the reverse osmosis sea fresh water technology is mature and widely applied.

The existing sea and freshwater technology provides high-pressure source water through a high-pressure pump which consumes more electricity, consumes a large amount of electric energy and has high cost. Therefore, many power stations require long distance in the near future, water needs to be taken from reservoirs or rivers, the waterline is long, the cost is huge, and the reliability and the safety of fresh water resources are insufficient due to the fact that the waterline is difficult to control outside a factory. The waves raised from the sea surface of the sea can be destructive under the influence of the season wind, and complicated bank protection engineering is needed to prevent the waves from eroding the coast. But this natural or waste energy is difficult to recycle due to low concentration.

For example, the Chinese patent application number is 201910577007.2, and the patent name is a sea water desalination system based on wave energy, the sea water desalination system comprises a primary buoy, a second buoy, a third buoy and a fourth buoy which are sequentially connected through a transmission bearing, and four sets of pressurizing units with the same structure, wherein each set of pressurizing unit respectively comprises a piston, a piston cylinder and a hydraulic oil cylinder which are sequentially connected, and the bottom of the hydraulic oil cylinder is an elastic diaphragm; the seawater desalination device comprises four sets of seawater desalination units with the same structure, each set of seawater desalination unit is connected with a corresponding pressurizing unit, and seawater permeates a reverse osmosis membrane to be filtered by utilizing pressure applied by the pressurizing units, so that fresh water is obtained. Although the sea water desalination system adopts wave energy for conversion to desalt the sea water and boost the pressure, the hydraulic oil is required to be used as a conversion medium, so that the whole device is too complex and high in cost.

On the other hand, the influence of warm water drainage on the environment is the key point of early approval work of the nuclear power station, and in order to reduce the influence of the environment, enough allowance is usually considered for the lift of the circulating water cooling pump in design, so that the warm water drainage is convenient for deep water drainage and remote water drainage, but a large amount of energy is objectively wasted. The large-scale application of combining the residual water head energy of warm water drainage of a power station and the wave energy of the sea surface for seawater desalination is not available.

Disclosure of Invention

The invention provides a fluid medium supercharging device, a seawater desalination system and a seawater cooling system, which overcome the defects of too complex device and high cost caused by the conversion of wave energy for seawater desalination and supercharging in the background technology. One of the technical schemes adopted by the invention for solving the technical problems is as follows:

a fluid medium pressurizing device, the pressurizing device comprising:

the piston cylinder body is provided with a fluid medium inlet and a fluid medium outlet;

the piston is movably arranged in the piston cylinder body and positioned between the fluid medium inlet and the fluid medium outlet, the piston comprises a large piston body, a small piston body and a piston rod, two ends of the piston rod are fixedly connected with the large piston body and the small piston body respectively, the outer end surface of the large piston body corresponds to the fluid medium inlet, 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, a high-pressure outlet area is formed between the small piston body and the piston cylinder body, and a variable-pressure cavity area is defined 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 assembly can periodically change the pressure in the pressure changing cavity area, so that the pressure applied to the large piston body is different from that applied to the small piston body, the piston reciprocates under the action of pressure difference, fluid media can enter the high-pressure outlet area when the piston moves towards the low-pressure inlet area, and the fluid media in the high-pressure inlet area is outwards output and pressurized when the piston moves towards the high-pressure outlet area, so that the continuous pressurization of the fluid media is realized.

In a preferred embodiment, the piston comprises a first-stage piston and a second-stage piston which are arranged in series, the first-stage piston comprises a first-stage large piston body, a first-stage small piston body and a first-stage piston rod, the second-stage piston comprises a second-stage large piston body, a second-stage small piston body and a second-stage piston rod, a low-pressure inlet area is formed between the outer end face of the first-stage large piston body and the piston cylinder body, the first-stage small piston body corresponds to the second-stage large piston body, and a high-pressure outlet area is formed between the outer end face of the second-stage small piston body and the piston cylinder body; the primary large piston body inner end surface, the primary small piston body inner end surface and the piston cylinder body are enclosed to form a primary variable pressure cavity area, the secondary large piston body inner end surface, the secondary small piston body inner end surface and the piston cylinder body are enclosed to form a secondary variable pressure cavity area, and the primary variable pressure cavity area is communicated with the secondary variable pressure cavity area.

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.

In a preferred embodiment, a flow passage is arranged between the low-pressure inlet area and the variable-pressure cavity area, the flow passage connects the low-pressure inlet area and the variable-pressure cavity area, and a control valve is arranged on the flow passage, when the piston moves to a limit position in the direction of the high-pressure outlet area, the control valve is triggered to open the flow passage, and when the piston moves to the limit position in the direction of the low-pressure inlet area, the control valve is triggered to close the flow passage.

In a preferred embodiment, a connecting passage is provided between the low pressure inlet region and the high pressure outlet region, the connecting passage connects the low pressure inlet region and the high pressure outlet region, and a connecting passage check valve is provided at the connecting passage for allowing the fluid medium in the low pressure inlet region to flow into the high pressure inlet region.

In a preferred embodiment, the connecting channel comprises a first-stage connecting channel and a second-stage connecting channel, the first-stage connecting channel vertically penetrates through the first-stage piston and is communicated with the low-pressure inlet area and the gap between the first-stage small piston body and the second-stage large piston body, and the second-stage connecting channel vertically penetrates through the second-stage piston and is communicated with the gap between the first-stage small piston body and the second-stage large piston body and the high-pressure outlet area; the primary connecting channel is provided with a primary connecting channel check valve, and the secondary connecting channel is provided with a secondary connecting channel check valve.

The second technical scheme adopted by the invention for solving the technical problems is as follows:

the seawater desalination system comprises a reverse osmosis seawater desalination device and the fluid medium supercharging device, wherein the fluid medium is seawater, the reverse osmosis seawater desalination device is provided with a high-pressure source seawater inlet, a low-pressure inlet area is communicated with seawater, and a high-pressure outlet area is communicated with the high-pressure source seawater inlet.

In a preferred embodiment, the pressure regulating assembly comprises a floating body and a pressure regulating chamber which is arranged on a piston cylinder body and is communicated with the pressure changing cavity area all the time, the piston cylinder body is fixed below the sea surface, the floating body floats on the sea surface and can float up and down along with sea waves, the bottom end of the floating body extends into the pressure regulating chamber, and the floating body floats up and down to periodically change the pressure intensity in the pressure changing cavity area.

In a preferred embodiment, the pressure regulating chamber is provided with a pressure regulating water outlet communicated with the seawater, and a pressure regulating check valve for allowing the seawater in the pressure regulating chamber to flow out is arranged at the pressure regulating water outlet.

Among a preferred embodiment, the pressure regulating subassembly is including the power station warm drainage blow-off culvert, hydraulic turbine and the medium pump that connect gradually, be linked together through the drainage way between medium pump and the vary voltage cavity district, and be provided with the ooff valve in drainage way department, trigger when the piston moves to extreme position towards high pressure export district direction the ooff valve is in order to close the drainage way, trigger when the piston moves to extreme position towards low pressure entry district direction the ooff valve is in order to open the drainage way.

The third technical scheme adopted by the invention for solving the technical problems is as follows:

the seawater desalination system is applied to the fluid medium supercharging device, the fluid medium is seawater, the seawater desalination system comprises two fluid medium supercharging devices, and the two fluid medium supercharging devices share a pressure regulating component; the pressure regulating assembly comprises a medium pump circulating device, the medium pump circulating device comprises a medium pump flowing pipeline and a medium pump, two ends of the medium pump flowing pipeline are respectively communicated with the pressure-variable cavity regions of the two fluid medium supercharging devices, the medium pump circulating device enables seawater in the pressure-variable cavity region of one fluid medium supercharging device to flow to the pressure-variable cavity region of the other fluid medium supercharging device and then flow back to the pressure-variable cavity region of the original fluid medium supercharging device, and the seawater circulating device performs circulating reciprocating motion so that when the piston of one fluid medium supercharging device moves towards the low-pressure inlet region, the piston of the other fluid medium supercharging device moves towards the high-pressure outlet region, and then the pressure and the water quantity of the fluid medium inlet and the fluid medium outlet are kept stable.

In a preferred embodiment, the number of the medium pump flow channels is two, the medium pump flow channels are respectively connected with the pressure-varying cavity regions of the two fluid medium pressurizing devices, a by-pass pipe is arranged between the two channels, the by-pass pipe divides the two medium pump flow channels into four symmetrically arranged branch pipes, a medium pump pressure valve is mounted on each branch pipe, the medium pump is mounted on the by-pass pipe, and when the medium pump works, the flow direction of water flow between the pressure-varying cavity regions of the two fluid medium pressurizing devices is changed through the combined action of the medium pump pressure valves.

In a preferred embodiment, the pressure regulating assembly further comprises a strong brine energy recovery device, and the strong brine energy recovery device recovers residual energy of strong brine of the seawater desalination system and provides additional power for the flow of water flow between the pressure-variable cavity regions of the two fluid medium pressurizing devices.

In a preferred embodiment, the strong brine energy recovery device comprises an energy recovery cylinder and an energy recovery piston, the energy recovery piston is movably installed in the energy recovery cylinder, the energy recovery piston divides the space in the energy recovery cylinder into a first connecting cavity, a middle cavity and a second connecting cavity which are not communicated with each other, and the first connecting cavity and the second connecting cavity are respectively communicated with the pressure-changing cavity regions of the two fluid medium supercharging devices; the middle intracavity is equipped with the baffle, the baffle separates into the middle chamber of first middle minute chamber and second middle minute chamber, wherein first middle minute chamber is equipped with first strong brine entry and first strong brine export, the second middle minute chamber is equipped with second strong brine entry and second strong brine export, and be provided with middle chamber control valve in the middle intracavity, the steerable first strong brine entry of this middle chamber control valve and second strong brine export are opened simultaneously and first strong brine export and second strong brine entry are closed simultaneously, perhaps first strong brine entry and second strong brine export are closed simultaneously and first strong brine export and second strong brine entry are opened simultaneously.

In a preferred embodiment, the first strong brine inlet and the first strong brine outlet, and the second strong brine inlet and the second strong brine outlet are arranged side by side and located at two sides of the partition plate respectively, the middle cavity control valve comprises a valve rod, and a first valve block and a second valve block fixedly connected to two ends of the valve rod respectively, the valve rod is movably connected with the partition plate, two side walls of the energy recovery piston are provided with a first abutting block and a second abutting block respectively, when the energy recovery piston moves to the limit position of one side, the second abutting block abuts against the valve rod so that the second valve block blocks the second strong brine inlet and the first valve block blocks the first strong brine outlet, and when the energy recovery piston moves to the limit position of the other side, the first abutting block abuts against the valve rod so that the first valve block blocks the first strong brine inlet and the second valve block blocks the second strong brine outlet.

In a preferred embodiment, the pressure signals of the first intermediate sub-chamber and the second intermediate sub-chamber trigger the opening and closing of the pressure valve of the medium pump, when the first intermediate sub-chamber is at a high pressure and the second intermediate sub-chamber is at a low pressure, the control valve of one group of the oblique symmetrical branch pipes is closed, the control valve of the other group of the oblique symmetrical branch pipes is opened, and when the first intermediate sub-chamber is at a low pressure and the second intermediate sub-chamber is at a high pressure, the pressure valve of the medium pump makes opposite actions to ensure that the medium pump and the strong brine energy recovery device synchronously control the water flow direction.

In a preferred embodiment, each fluid medium supercharging device is provided with a flow rate adjusting unit, the flow rate adjusting unit comprises a first flow rate adjusting channel, a second flow rate adjusting channel and a flow direction control valve, two ends of the first flow rate adjusting channel are respectively communicated with a low-pressure inlet area and a variable-pressure cavity area of the same fluid medium supercharging device, and a first flow rate adjusting one-way valve is arranged in the first flow rate adjusting channel; two ends of the second flow regulating channel are respectively communicated with a low-pressure inlet area and a pressure-changing cavity area of the same fluid medium supercharging device, and a second flow regulating one-way valve is arranged in the second flow regulating channel; and the fluid direction of the first flow regulating check valve is opposite to the fluid direction of the second flow regulating check valve; the flow direction control valve is positioned in the pressure-changing cavity area to control the staggered connection of the first flow regulating channel and the second flow regulating channel.

In a preferred embodiment, the medium pump circulation device further includes a solar driving assembly, the solar driving assembly includes a photovoltaic support rod and a photovoltaic power generation panel, the photovoltaic support rod is fixed in the seawater environment, and the photovoltaic power generation panel is fixedly connected to the photovoltaic support rod and electrically connected to the medium pump.

In a preferred embodiment, the medium pump circulation device further comprises a wave energy driving assembly, the wave energy driving assembly comprises an upper chamber, a lower chamber and a water wheel, the upper chamber is communicated with the lower chamber, the upper chamber and the lower chamber are both arranged at the photovoltaic supporting rod, the upper chamber is provided with a wave energy water inlet one-way valve, the lower chamber is provided with a wave energy water outlet one-way valve, the water wheel is arranged between the upper chamber and the lower chamber, the medium pump is connected with the water wheel, seawater waves flow into the upper chamber from the wave energy water inlet one-way valve and push the water wheel to continuously rotate and then flow out from the wave energy water outlet one-way valve, and the water wheel rotates to drive the medium pump to work.

The fourth technical scheme adopted by the invention for solving the technical problems is as follows:

the seawater cooling system is applied to the fluid medium supercharging device, the fluid medium is gas, the seawater cooling system further comprises a gas cooling device, the gas cooling device is communicated with a fluid medium outlet and seawater to be cooled, the boosted gas enters the gas cooling device from the fluid medium outlet, then enters the seawater to be cooled from the gas cooling device, is cooled to the seawater to be cooled, and is discharged from the seawater to be cooled in a bubbling mode.

Compared with the background technology, the technical scheme has the following advantages:

1. the fluid medium supercharging device periodically changes the pressure intensity in the pressure-changing cavity area through the pressure-regulating component, so that the pressure applied to the large piston body is different from that applied to the small piston body, the piston reciprocates under the action of pressure difference, the fluid medium can enter the high-pressure outlet area when the piston moves towards the low-pressure inlet area, and the fluid medium in the high-pressure inlet area is output outwards and supercharged when the piston moves towards the high-pressure outlet area, so that the continuous supercharging of the fluid medium is realized, the whole device can drive the piston to operate only by small energy, the high-strength supercharging of the fluid medium is continuously performed, and a high-pressure sea medium pump with serious power consumption is saved; meanwhile, the structure is not complex, objects needing sealing such as hydraulic oil and the like are not involved, the whole structure can be designed to be simpler, and the cost is lower.

2. The piston includes one-level piston and second grade piston, and the second grade piston can regard as the second grade pressure boost of one-level piston, and two pistons are series arrangement, can strengthen the pressure boost effect.

3. The primary connecting channel is arranged on the primary piston, and the secondary connecting channel is arranged on the secondary piston, so that the device has a more compact and small structure, and the internal space is fully utilized.

4. The pressure regulating assembly comprises a floating body and a pressure regulating chamber, the floating body moves up and down along with waves to change the pressure of the pressure regulating chamber, namely, the wave energy is utilized to realize the pressure regulation of the seawater desalination system, and natural resources are fully utilized.

5. The pressure regulating assembly comprises a power station warm water discharge pipe culvert, a water turbine and a medium pump which are sequentially connected, and can be used for regulating the pressure of the seawater desalination system by using the energy of the residual water head of the warm water discharge of the power station, so that the resource is reasonably utilized, and the resource waste is avoided.

6. The seawater desalination system comprises two fluid medium supercharging devices, the two fluid medium supercharging devices share a fluid medium inlet and a fluid medium outlet, and the two fluid medium supercharging devices share a pressure regulating assembly, so that the structure of the system can be greatly simplified, and the cost is reduced.

The seawater desalination system utilizes the energy of photovoltaic, wave and warm water discharge residual pressure water heads to drive the pressure regulating assembly to work in an independent or mutually combined mode, and high-pressure source water is provided for the seawater desalination device. The seawater desalination technology disclosed by the invention can realize efficient recycling of dispersed energy, saves a high-pressure seawater medium pump with high manufacturing cost, saves electric energy, reduces the seawater desalination cost, and is economic and environment-friendly.

7. The medium pump circularly and repeatedly flows the seawater in the two pressure-changing cavity areas so that the piston of one fluid medium supercharging device moves towards the low-pressure inlet area while the piston of the other fluid medium supercharging device moves towards the high-pressure outlet area, and then the water quantity of the fluid medium inlet and the fluid medium outlet is kept stable, and therefore the energy utilization rate is improved.

8. The pressure regulating assembly further comprises a strong brine energy recovery device, the strong brine energy recovery device not only can provide pressure signals for the medium pump pressure valve bank, but also makes full use of residual energy of strong brine, further improves the energy utilization rate, enables the medium pump to complete the work of the medium pump only by a common low-pressure medium pump, reduces resource consumption and further reduces the cost.

9. The solar driving assembly generates power through the photovoltaic power generation panel to supply power to the medium pump, and utilization of natural resources is improved.

10. The wave energy driving assembly drives the medium pump to work through electric energy generated by rotation of the water wheel, and utilization of natural resources is improved.

11. The fluid medium supercharging device can also be used for seawater cooling, the fluid medium is gas, the gas after pressure boosting enters the gas cooling device from the fluid medium outlet, then enters the liquid to be cooled from the gas cooling device so as to cool the liquid to be cooled, and then is discharged from the liquid to be cooled in a foaming manner. Therefore, the boosting of air can be utilized to cool warm water, and compared with a conventional warm water cooling device, the whole system is small in structure and low in cost.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic diagram of a desalination system according to an embodiment.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a second partial enlarged view of fig. 1.

FIG. 4 is a schematic diagram of a seawater desalination system according to another preferred embodiment.

Fig. 5 is a schematic cross-sectional view of a fluid medium pressurizing device according to another preferred embodiment.

FIG. 6 is a schematic diagram of a brine energy recovery device according to another preferred embodiment.

Fig. 7 shows a partial enlarged view of fig. 6.

Fig. 8 is a schematic structural diagram of a medium pump circulation device according to another preferred embodiment.

Fig. 9 is a schematic structural diagram of a solar energy driving assembly and a wave energy driving assembly according to another preferred embodiment.

FIG. 10 is a schematic cross-sectional view of a seawater cooling system according to a preferred embodiment.

Detailed Description

In the claims, the description and the drawings of the present invention, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used to distinguish between different items and are not used to describe a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" and "fixedly connected" should be interpreted broadly, that is, any connection between the two that is not in a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having", and variations thereof, are intended to be inclusive and not limiting.

For the sake of convenience of distinction, the fluid medium pressurizing means in fig. 2 is defined as a first fluid medium pressurizing means 100, and the fluid medium pressurizing means in fig. 3 is defined as a second fluid medium pressurizing means 200.

Referring to fig. 2, in a preferred embodiment of the first fluid medium pressurizing device 100, the first fluid medium pressurizing device includes a first piston cylinder 110, a first piston, and a first pressure regulating assembly.

The first piston-cylinder 110 is provided with a fluid medium inlet 1101 and a fluid medium outlet 1102. As shown in fig. 2, 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.

The first piston is movably connected in the first piston cylinder body 110 and located between the fluid medium inlet 1101 and the fluid medium outlet 1102, the first piston comprises a large piston body, a small piston body and a piston rod, two ends of the piston rod are fixedly connected with the large piston body and the small piston body respectively, the outer end face of the large piston body corresponds to the fluid medium inlet 1101, a low-pressure inlet area is formed between the large piston body and the piston cylinder body, the outer end face of the small piston body corresponds to the fluid medium outlet 1102, a high-pressure outlet area is formed between the small piston body and the piston cylinder body 110, and a variable-pressure cavity area is defined by the inner end face of the large piston body, the inner end face of the small piston body, the piston cylinder body 110 and the outer peripheral face of the piston.

In this embodiment, the first piston includes a first primary piston 130 and a first secondary piston 140 which are placed in series and spaced up and down, the first primary piston 130 includes a first large primary piston body 133, a first small primary piston body 135 and a first primary piston rod 134, the first secondary piston 140 includes a first large secondary piston body 143, a first small secondary piston body 145 and a first secondary piston rod 144, a first low pressure inlet area 1122 is formed between the outer end surface of the first large primary piston body 133 and the first piston cylinder 110, the first small primary piston body 135 corresponds to the first large secondary piston body 143, and the first high pressure outlet area 113 is formed between the outer end surface of the first small secondary piston body 145 and the first piston cylinder 110; a first primary variable pressure cavity area 1121 is defined between the inner end surface of the first primary large piston body 133, the inner end surface of the first primary small piston body 135, the first piston cylinder body 110 and the outer peripheral surface of the first primary piston rod 134, a first secondary variable pressure cavity area 1162 is defined between the inner end surface of the first secondary large piston body 143, the inner end surface of the first secondary small piston body 145, the first piston cylinder body 110 and the outer peripheral surface of the first secondary piston rod 144, and the first primary variable pressure cavity area 1121 and the first secondary variable pressure cavity area 1162 are kept communicated all the time through a first trickle cavity 119. The cross-sectional area of the first one-stage small piston body 135 is smaller than the cross-sectional area of the first two-stage large piston body 143.

The first piston may further include a third-stage piston, a fourth-stage piston, etc. as required, as long as the sectional area of the large piston body of the previous stage is smaller than that of the large piston body of the next stage, which is not limited thereto.

In this embodiment, a first passing flow channel 118 is disposed between the first low pressure inlet region 1122 and the first primary variable pressure cavity region 1121, the first passing flow channel 118 connects the first low pressure inlet region 1122 and the first primary variable pressure cavity region 1121, a first control valve 1123 is disposed on the first passing flow channel 118, the first control valve 1123 is triggered to open the first passing flow channel 118 when the first piston moves to the limit position in the direction of the first high pressure outlet region 113, and the first control valve 1123 is triggered to close the first passing flow channel 118 when the first piston moves to the limit position in the direction of the first low pressure inlet region 1122.

Specifically, the first primary piston rod 134 is provided with an upper driving portion 1341 and a lower driving portion 1342 which are arranged at an interval from top to bottom, the lower driving portion 1342 pushes the first control valve 1123 away from an opening of the first bypass passage 118 connected to the first primary variable pressure cavity region 1121 so that the first primary variable pressure cavity region 1121 communicates with the first primary low pressure inlet region 1122 when the first primary piston 130 moves to the top limit position, and the upper driving portion 1341 pushes the first control valve 1123 to block the opening of the first bypass passage 118 connected to the first primary variable pressure cavity region 1121 so that the first primary variable pressure cavity region 1121 is disconnected from the first primary low pressure inlet region 1122 when the first primary piston 130 moves to the bottom limit position. As shown in fig. 2, the upper driving portion 1341 and the lower driving portion 1342 are L-shaped rods and are symmetrically arranged, and the first control valve 1123 is located between a vertical section of the upper driving portion 1341 and a vertical section of the lower driving portion 1342.

A connecting channel is arranged between the first low-pressure inlet region 1122 and the first high-pressure outlet region 113, the connecting channel connects the first low-pressure inlet region 1122 with the first high-pressure outlet region 113, and a connecting channel check valve is arranged at the connecting channel and can enable the fluid medium in the first low-pressure inlet region 1122 to flow into the first high-pressure inlet region 113.

In this embodiment, the connecting passages include a first primary connecting passage 131 and a first secondary connecting passage 141, the first primary connecting passage 131 vertically penetrates the first primary piston 130 and communicates with the first low-pressure inlet region 1122 and the gap between the first primary small piston body 135 and the first secondary large piston body 143, the first secondary connecting passage 141 vertically penetrates the first secondary piston 140 and communicates with the gap 1162 between the first primary small piston body 135 and the first secondary large piston body 143 and the first high-pressure outlet region 113; the first primary connecting passage 131 is provided with a first primary connecting passage check valve 132, and the first secondary connecting passage 141 is provided with a first secondary connecting passage check valve 142. As shown in fig. 2, the first primary connecting passage check valve 132 is located at the top end of the first primary connecting passage 131, and the first secondary connecting passage check valve 142 is located at the top end of the first secondary connecting passage 141.

Alternatively, the connection passage may be directly provided outside the first piston cylinder 110, if necessary, without being limited thereto.

The first pressure regulating assembly can periodically change the pressure in the pressure changing cavity area, so that the pressures applied to the large piston body and the small piston body are different, the first piston reciprocates under the action of pressure difference, fluid media can enter the high-pressure outlet area 113 when the first piston moves towards the low-pressure inlet area 1122, and the fluid media in the first high-pressure inlet area 113 is outwards output and pressurized when the first piston moves towards the first high-pressure outlet area 113, so that the continuous pressurization of the fluid media is realized.

In this embodiment, the first pressure regulating assembly includes a floating body 120 and a pressure regulating chamber 111 disposed in the piston cylinder 110 and in constant communication with the first primary pressure variable cavity region 1121, the floating body 120 can float on the sea and float up and down along with the sea wave, the bottom end of the floating body 120 extends into the pressure regulating chamber 111, and the floating body 120 floats up and down to periodically change the pressure in the first primary pressure variable cavity region 1121.

In this embodiment, the pressure regulating chamber 111 is provided with a pressure regulating water outlet 114 communicated with the seawater, and a pressure regulating check valve 115 for allowing the seawater in the pressure regulating chamber 111 to flow out is disposed at the pressure regulating water outlet 114.

Referring to fig. 3, a preferred embodiment of the second fluid medium pressurizing device is shown.

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

In this embodiment, the second piston includes a second-stage piston 220 and a second-stage piston 240 which are placed in series and spaced up and down, 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 face of the second-stage large piston body 243 and the second piston cylinder 210, the second-stage small piston body 225 corresponds to the second-stage large piston body 243, and the second high-pressure outlet area is formed between the outer end face of the second-stage small piston body 245 and the second piston cylinder 210; a second primary variable-pressure cavity area 2112 is defined by the inner end face of the second primary large piston body 223, the inner end face of the second primary small piston body 225, the second piston cylinder body 210 and the outer peripheral face of the second primary piston rod 224, a second secondary variable-pressure cavity area 2131 is defined by the inner end face of the second secondary large piston body 243, the inner end face of the second secondary small piston body 245, the second piston cylinder body 210 and the outer peripheral face of the second secondary piston rod 244, and the second primary variable-pressure cavity area 2112 and the second secondary variable-pressure cavity area 2131 are kept to be communicated all the time through a second trickle cavity 214. And, the sectional area of the second-stage small piston body 225 is smaller than that of the second-stage large piston body 243.

In this embodiment, a second overflow passage 2115 is disposed between the second low-pressure inlet region 2111 and the second-stage pressure-varying cavity region 2112, the second overflow passage 2115 connects the second low-pressure inlet region 2111 to the second-stage pressure-varying cavity region 2112, and a second control valve 2113 is disposed on the second overflow passage 2115, when the second piston moves to the limit position in the direction of the second high-pressure outlet region 212, the second control valve 2113 is triggered to open the second overflow passage 2115, and when the second piston moves to the limit position in the direction of the second low-pressure inlet region 2111, the second control valve 2113 is triggered to close the second overflow passage 2115.

In this embodiment, the second pressure regulating subassembly includes power station warm drainage water discharging pipe culvert 231, hydraulic turbine 232 and the medium pump 233 that connects gradually, be linked together through drainage 2116 between medium pump 233 and the second one-level pressure-changing cavity district 2112, medium pump 233 provides the negative pressure for second one-level pressure-changing cavity district 2112, and is provided with ooff valve 2114 in drainage 2116 department, triggers when the second piston moves to extreme position towards second high pressure export district 212 direction the ooff valve 2114 is in order to close drainage 2116, triggers when the second piston moves to extreme position towards second low pressure import district 2111 direction the ooff valve 2114 is in order to open drainage 2116.

In this embodiment, the left side of the second-stage piston rod 224 is provided with a left upper driving part 2241 and a left lower driving part 2242 which are arranged at an interval from top to bottom, and the right side of the second-stage piston rod 224 is provided with a right upper driving part 2243 and a right lower driving part 2244 which are arranged at an interval from top to bottom; the second control valve 2113 is located between the upper left driving section 2241 and the lower left driving section 2242, and the on-off valve 2114 is located between the upper right driving section 2243 and the lower right driving section 2244.

In this embodiment, an opening of the second flow passage 2115 communicating with the second-stage pressure-variable cavity region 2112 and an opening of the drainage passage 2116 communicating with the second-stage pressure-variable cavity region 2112 are arranged in a staggered manner.

When the second-stage piston 220 is at the upper limit position, the second control valve 2113 opens the opening of the second flow passage 2115 communicated with the second-stage pressure-changing cavity region 2112, and the switch valve 2114 closes the opening of the flow guide passage 2116 communicated with the second-stage pressure-changing cavity region 2112; when the second stage piston 220 is at the lower extreme position, the second control valve 2113 closes the opening of the second transfer passage 2115 communicating with the second stage pressure-changing cavity region 2112, and the switching valve 2114 opens the opening of the transfer passage 2116 communicating with the second stage pressure-changing cavity region 2112.

In this embodiment, the connecting passages include a second primary connecting passage 221 and a second secondary connecting passage 241, the second primary connecting passage 221 extends vertically through the second primary piston 220 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 passage 241 vertically penetrates the second secondary piston 240 and communicates the gap 2131 between the second-stage small piston body 225 and the second-stage large piston body 243 with the second high-pressure outlet region 212; the second primary connecting passage 221 is provided with a second primary connecting passage check valve 222, and the second secondary connecting passage 241 is provided with a second secondary connecting passage check valve 242. As shown in fig. 3, the second primary connecting passage check valve 222 is located at the top end of the second primary connecting passage 221, and the second secondary connecting passage check valve 242 is located at the top end of the second secondary connecting passage 241.

Referring to fig. 1, a preferred embodiment of a seawater desalination system is disclosed, which employs the fluid medium pressurizing device, and the seawater desalination system includes a reverse osmosis seawater desalination device, a first fluid medium pressurizing device 100, and a second fluid medium pressurizing device 200, where the fluid medium is seawater, the reverse osmosis seawater desalination device is provided with a high-pressure source seawater inlet 8, the low- pressure inlet regions 1122 and 2111 are communicated with seawater, and the high- pressure outlet regions 113 and 212 are communicated with the high-pressure source seawater inlet 8. According to the requirement, the seawater desalination system can only comprise one of the two fluid medium pressurizing devices, and the device is not limited to this.

The front end of the reverse osmosis sea fresh water device is also provided with a high-pressure storage tank 1, the high-pressure source sea water inlet 8 is positioned at the top end of the high-pressure storage tank 1, and the bottom end of the high-pressure storage tank 1 is provided with a storage tank one-way valve 7. The first high-pressure outlet area 113 of the first fluid medium supercharging device 100 is connected with the high-pressure source seawater inlet 8 through the first supercharging pipeline 2, the high-pressure outlet area of the second fluid medium supercharging device is connected with the high-pressure source seawater inlet 8 through the second supercharging pipeline 4, and a three-way structure is formed among the first supercharging pipeline 2, the second supercharging pipeline 4 and the high-pressure source seawater inlet 8. And a first pressurizing one-way valve 3, a second pressurizing one-way valve 5 and an inlet one-way valve 6 are respectively arranged at the head end of the first pressurizing pipeline 2, the head end of the second pressurizing pipeline 4 and the high-pressure source seawater inlet 8.

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 is fixed on the ground or below the sea surface.

The working principle of the first fluid medium charging device 100 will be explained first:

when the floating body 120 moves upwards along with the waves, the pressure regulating check valve 115 is closed, negative pressure is formed in the pressure regulating chamber 111, the pressure regulating chamber 111 is always communicated with the first primary variable pressure cavity region 1121, the first primary variable pressure cavity region 1121 also forms negative pressure, and the first primary piston 130 moves upwards under the action of pressure difference; the first primary variable-pressure cavity region 1121 and the first secondary variable-pressure cavity region 1162 are communicated through the first trickle cavity 119, so that the first secondary variable-pressure cavity region 1162 also forms negative pressure, and the first secondary piston 140 moves upwards under the action of pressure difference;

then, when the first primary 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 pressurizing check valve 3 and the inlet pressurizing check valve 6 to press the seawater into the high pressure storage tank 1; meanwhile, the lower driving part 1142 pushes the first control valve 1123 upwards and away, the first control valve 1123 is opened, the first primary variable pressure cavity region 1121 is communicated with the first low pressure inlet region 1122 and the pressure of the first primary variable pressure cavity region 1121 is equal to that of the first low pressure inlet region 1122, and seawater is filled into the pressure regulating chamber 111 and the first secondary variable pressure cavity region 1162 from the first low pressure inlet region 1122 through the first primary variable pressure cavity region 1121; if the floating body 120 is still at the high position of the sea wave, the first primary variable-pressure cavity region 1121, the pressure regulating cavity 111 and the first secondary variable-pressure cavity region 1162 are filled with the sea water;

when the floating body 120 moves downwards along with the waves, the pressure regulating check valve 115 is opened and the seawater in the pressure regulating chamber 111 can be discharged from the pressure regulating check valve 115, and the first primary piston 130 moves downwards under the action of its own gravity and the gravity of the seawater in the first primary pressure variable cavity region 1121, so that the external seawater enters a gap 1161 between the first primary piston and the first secondary piston after passing through the first primary connecting channel 131 and the first primary connecting channel check valve 132 from the first low pressure inlet region 1122; the first secondary piston 140 moves downward under the action of its own gravity and the gravity of the seawater in the first secondary variable pressure cavity region 1162, and the seawater in the gap 1161 between the first primary piston 130 and the first secondary piston 140 enters the first high-pressure outlet region 113 after passing through the first secondary connecting passage 141 and the first secondary connecting passage check valve 142;

when the first primary piston 130 and the first secondary piston 140 move downward to the limit positions, the first control valve 1123 moves downward and is closed by the upper driving part 1342, the first primary variable pressure cavity region 1121 is separated from the first low pressure inlet region 1122, the pressure regulating check valve 115 is closed, the external seawater cannot enter the pressure regulating cavity 111, the floating body 120 waits for the floating again, and the above-described operations are repeated.

The second supercharging arrangement 200 operates on the following principle:

the second pressure regulating assembly 230 provides a constant negative pressure;

when the second primary piston 220 is located at the top extreme position, the pressure in the second high-pressure outlet area 212 reaches the maximum, and the seawater in the second high-pressure outlet area 212 enters the storage tank 1 after passing through the second booster check valve 5 and the inlet booster check valve 6; meanwhile, the second control valve 2113 is opened under the push of the lower left driving part 2242, the switch valve 2114 is closed under the push of the lower right driving part 2244, the second-stage pressure varying cavity area 2112 is disconnected with the medium pump 233 and is communicated with the second low-pressure inlet area 2111, the second-stage pressure varying cavity area 2112 is always communicated with the second-stage pressure varying cavity area 2131, the second low-pressure inlet area 2111 and the second-stage pressure varying cavity area 2112 keep the same pressure, the seawater in the second low-pressure inlet area 2111 enters the second-stage pressure varying cavity area 2112, the seawater in the second-stage pressure varying cavity area 2112 enters the second-stage pressure varying cavity area 2131 through the second trickle cavity 214, the second primary piston 220 moves downwards under the action of the self weight of the second primary piston and the gravity of the seawater in the second primary pressure-changing cavity area 2112, the second secondary piston 240 moves downwards under the action of the self weight of the second secondary piston and the gravity of the seawater in the second secondary pressure-changing cavity area 2131, the seawater in the second low-pressure inlet area 2111 enters a gap 2132 between the second primary piston 220 and the second secondary piston 240 through the second primary connecting channel 221 in the downward movement process of the second primary piston 220, and the seawater in the gap 2132 between the second primary piston 220 and the second secondary piston 240 enters the second high-pressure outlet area 212 through the second secondary connecting channel 241 in the downward movement process of the second secondary piston 240;

when the second primary piston 220 moves downwards to the limit position of the bottom end, the second control valve 2113 is closed under the push of the upper left driving part 2241, the on-off valve 2114 is opened under the push of the upper right driving part 2243, the second primary pressure-changing cavity area 2112 is communicated with the medium pump 233, the second primary pressure-changing cavity area 2112 is disconnected from the second low-pressure inlet area 2111, the medium pump 233 provides negative pressure for the second primary pressure-changing cavity area 2112, the second secondary pressure-changing cavity area 2131 also forms negative pressure, the second primary piston 220 moves upwards under the action of pressure difference, the second secondary piston 240 moves upwards under the action of pressure difference until the second primary piston 220 and the second secondary piston 240 are both located at the limit position, at this time, the pressure in the second high-pressure outlet area 212 reaches the maximum, seawater in the second high-pressure outlet area 212 enters the tank 1 after passing through the second pressurization one-way valve 5 and the inlet pressurization one-way valve 6, and the above-mentioned operations are repeated.

Referring to fig. 4 to 9, another preferred embodiment of the seawater desalination system is shown, which employs a fluid medium pressurization device, wherein the fluid medium is seawater.

As shown in fig. 4, the seawater desalination system includes two fluid medium pressurization devices, the two fluid medium pressurization devices may share a fluid medium inlet and a fluid medium outlet, or may be respectively and independently provided with a fluid medium inlet and a fluid medium outlet, and the two fluid medium pressurization devices share a pressure regulating assembly.

For the sake of convenience of distinction, the two fluid medium pressurizing devices in fig. 4 are defined as a third fluid medium pressurizing device 300, and as shown in particular in fig. 5, the third fluid medium pressurizing device 300 is substantially identical in structure to the first fluid medium pressurizing device 100, and includes:

the third fluid medium pressurizing device 300 comprises a third piston cylinder 310, a third piston and a third pressure regulating assembly.

In this embodiment, the third piston includes a third-stage piston 320 and a third-stage piston 330 which are placed in series and spaced up and down, the third-stage piston 320 includes a third-stage large piston body 321, a third-stage small piston body 322 and a third-stage piston rod 323, the third-stage piston 330 includes a third-stage large piston body 331, a third-stage small piston body 332 and a third-stage piston rod 333, a third low-pressure inlet area 324 is formed between the outer end face of the third-stage large piston body 321 and the third piston cylinder 310, the third-stage small piston body 322 corresponds to the third-stage large piston body 331, and a third high-pressure outlet area 340 is formed between the outer end face of the third-stage small piston body 332 and the third piston cylinder 310; a third primary pressure-transformation cavity area 325 is defined by the inner end surface of the third primary large piston body 321, the inner end surface of the third primary small piston body 322 and the third piston cylinder body 310, a third secondary pressure-transformation cavity area 334 is defined by the inner end surface of the third secondary large piston body 331, the inner end surface of the third secondary small piston body 332 and the third piston cylinder body 310, and the third primary pressure-transformation cavity area 325 and the third secondary pressure-transformation cavity area 334 are kept communicated with each other all the time through a third trickle cavity 335. And, the sectional area of the third-stage small piston body 322 is smaller than that of the third-stage large piston body 331.

In this embodiment, as shown in fig. 4 and 8, the pressure regulating assembly includes a medium pump circulation device.

The medium pump circulating device comprises a medium pump flow pipeline 400 and a medium pump 410, two ends of the medium pump flow pipeline are respectively communicated with the pressure-variable cavity regions of the two fluid medium supercharging devices, the medium pump circulating device enables seawater in the pressure-variable cavity region of one fluid medium supercharging device to flow to the pressure-variable cavity region of the other fluid medium supercharging device and then flow back to the pressure-variable cavity region of the original fluid medium supercharging device, and the circulation is repeated, so that when the piston of one fluid medium supercharging device moves towards the low-pressure inlet region, the piston of the other fluid medium supercharging device moves towards the high-pressure outlet region, and further the pressure and the water quantity of the fluid medium inlet and the fluid medium outlet are kept stable.

In this embodiment, the two medium pump flow pipes 400 are respectively connected to two pressure-variable cavity regions of two fluid medium pressurizing devices, a bypass pipe 411 is disposed between the two pipes, the two medium pump flow pipes are divided into four symmetrically-arranged branch pipes by the bypass pipe 411, a medium pump pressure valve is installed on each branch pipe, the medium pump 410 is installed on the bypass pipe 411, and when the medium pump 410 works, the flow direction of water flow between the pressure-variable cavity regions of the two fluid medium pressurizing devices is changed through the combined action of the medium pump pressure valves.

Specifically, the medium pump the medium pump pressure valve group includes four medium pump pressure valves, which are 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.

The medium pump circulation device has two water flow directions, one is that the seawater in the third primary pressure-changing cavity area 325 at the left side in fig. 4 flows into the third primary pressure-changing cavity area 325 at the right side after flowing through the second medium pump pressure valve 430, the medium pump 410 and the third medium pump pressure valve 440; the second is that the seawater in the third primary pressure swing cavity area 325 on the right side flows into the third primary pressure swing cavity area 325 on the left side after flowing through the fourth medium pump pressure valve 450, the medium pump 410 and the first medium pump pressure valve 420.

In this embodiment, as shown in fig. 4, 6, and 7, the pressure regulating assembly further includes a concentrated brine energy recovery device, and the concentrated brine energy recovery device recovers residual energy of concentrated brine of the seawater desalination system, and provides additional power for the flow of water flow between the pressure-swing cavity regions of the two fluid medium pressurization devices.

Specifically, as shown in fig. 6 and 7, the concentrated brine energy recovery device includes an energy recovery cylinder 500 and an energy recovery piston 510, the energy recovery piston 510 is movably installed in the energy recovery cylinder 500, the energy recovery piston 510 divides the space in the energy recovery cylinder 500 into a first connection cavity 520, an intermediate cavity 530 and a second connection cavity 540 that are not communicated with each other, and the first connection cavity 520 and the second connection cavity 540 are respectively communicated with the third-stage pressure-changing cavity regions 325 of the two fluid medium pressurization devices; the middle cavity 530 is internally provided with a partition 531, the partition 531 divides the middle cavity 530 into a first middle sub-cavity 532 and a second middle sub-cavity 533 which are not communicated with each other, wherein the first middle sub-cavity 532 is provided with a first strong brine inlet I1 and a first strong brine outlet O1, the second middle sub-cavity 533 is provided with a second strong brine inlet I2 and a second strong brine outlet O2, the middle cavity 530 is internally provided with a middle cavity control valve 550, pressure signals of the first middle sub-cavity 532 and the second middle sub-cavity 533 trigger the opening and closing action of the medium pump pressure valve, when the first middle sub-cavity 532 is high-pressure and the second middle sub-cavity 533 is low-pressure, the medium pump pressure valve on one set of the oblique symmetrical branch pipes is closed, the control valve on the other set of the oblique symmetrical branch pipes is opened, and when the first middle sub-cavity 532 is low-pressure and the second middle sub-cavity 533 is high-pressure, the medium pump pressure valve does opposite action to ensure that the medium pump and the strong brine energy recovery device synchronously control the water flow direction.

Specifically, the middle chamber control valve 550 may control the first and second brine outlets O1 and I2 to be opened and the first and second brine outlets I1 and O2 to be closed simultaneously, as shown in fig. 6, at this time, when the pressure of the second middle sub-chamber 533 is in a high pressure state and the pressure of the first middle sub-chamber 532 is in a low pressure state, the second and third medium pump pressure valves 430 and 440 may be controlled to be opened, and the fourth and first medium pump pressure valves 450 and 420 may be closed, so that the seawater in the left third primary variable pressure cavity region 325 may enter the right third primary variable pressure cavity region 325. This middle chamber control valve 550 can also control the first and second brine outlets O1 and I2 to be closed at the same time and the first and second brine outlets I1 and O2 to be opened at the same time, as shown in fig. 7, at this time, the first middle sub-chamber 532 is in a high pressure state, the pressure of the second middle 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, the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420 are opened, so that the seawater in the third primary variable pressure cavity area 325 on the right side can enter the third primary variable pressure cavity area 325 on the left side.

In this embodiment, the first brine inlet I1 and the first brine outlet O1, and the second brine inlet I2 and the second brine outlet O2 are arranged side by side and located at two sides of the partition 531, respectively, the middle chamber control valve 550 includes a valve rod 551, and a first valve block 552 and a second valve block 553 respectively fixed at two ends of the valve rod 551, the valve rod 551 is movably connected with the partition 531, two side walls of the energy recovery piston are respectively provided with a first abutting block 554 and a second abutting block 555, when the energy recovery piston moves to a limit position at the left side, the second abutting block 555 abuts against the valve rod to make the second valve block 553 block O2 and the first valve block 552 block I1 block the first brine inlet I1, as shown in fig. 6; when the energy recovery piston moves to the extreme position on the right, first abutment 554 abuts valve stem 551 such that first valve block 552 blocks first brine outlet O1 and second valve block 553 blocks second brine inlet I2, as shown in fig. 7.

In this embodiment, each third fluid medium pressure boosting device is provided with a flow rate adjusting unit, the flow rate adjusting unit includes a first flow rate adjusting channel 326, a second flow rate adjusting channel 328 and flow direction control valves 327 and 329, two ends of the first flow rate adjusting channel 326 are respectively communicated with the third low-pressure inlet region 324 and the third primary pressure-changing cavity region 325 of the same third fluid medium pressure boosting device 300, and a first flow rate adjusting one-way valve 3261 is arranged in the first flow rate adjusting channel 326; two ends of the second flow regulating channel 328 are respectively communicated with a third low-pressure inlet area 324 and a third primary pressure-changing cavity area 325 of the same third fluid medium supercharging device, and a second flow regulating check valve 3281 is arranged in the second flow regulating channel 328; and, the fluid direction of first flow control check valve 3261 is opposite to the fluid direction of second flow control check valve 3281; the flow control valves 327, 329 are located in the third stage pressure swing cavity region 325 to control the staggered communication of the first flow regulating passage 326 and the second flow regulating passage 328.

In this embodiment, the flow direction control valves 327 and 329 include a first flow direction control valve 327 and a second flow direction control valve 329, the first flow direction control valve 327 being coupled to an outlet of the first flow regulating passage 326, and the second flow direction control valve 329 being coupled to an inlet of the second flow regulating passage 328. When the third piston moves to the limit position in the direction of the third high pressure outlet area 340, the first flow control valve 327 is triggered to open the first flow regulating passage 326, the second flow control valve 329 closes the second flow regulating passage 328, and when the third piston moves to the limit position in the direction of the third low pressure inlet area 324, the first flow control valve 327 is triggered to close the first flow regulating passage 326, and the second flow control valve 329 opens the second flow regulating passage 328.

In this embodiment, as shown in fig. 9, the medium pump circulation device further includes a solar driving assembly, the solar driving assembly 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 fixedly connected to the photovoltaic support rod 600 and electrically connected to the medium pump 410.

In this embodiment, the medium pump circulation device further comprises a wave energy driving assembly, the wave energy driving assembly comprises an upper chamber 710, a lower chamber 720 and a water wheel 730, the upper chamber 710 is communicated with the lower chamber 720, the upper chamber 710 is provided with a wave energy water inlet one-way valve 711, the lower chamber 720 is provided with a wave energy water outlet one-way valve 721, the water wheel 730 is mounted between the upper chamber 710 and the lower chamber 720, the medium pump 410 is connected with the water wheel 730, seawater waves flow into the upper chamber 710 from the wave energy water inlet one-way valve 711 and push the water wheel 730 to continuously rotate and then flow out from the wave energy water outlet one-way valve 721, and electric energy generated by rotation of the water wheel 730 drives the medium pump 410 to work.

In order to ensure a compact structure and cost saving, the upper chamber 710 and the lower chamber 720 are disposed at the photovoltaic strut 600.

According to the requirements, a plurality of wave energy driving assemblies can be arranged and combined, the upper chambers 710 are communicated, and the lower chambers 720 are communicated.

The working principle of the seawater desalination system is as follows:

after the seawater enters the third low pressure inlet area 324, if the right-side third-stage piston 320 moves upward, the left-side third-stage piston 320 is in a downward movement state, and vice versa, if the right-side third-stage piston 320 moves downward, the left-side third-stage piston 320 is in an upward movement state.

Taking the example that the third primary piston 320 on the right side moves upward and the third primary piston 320 on the left side moves downward, at this time, the second media pump pressure valve 430 and the third media pump pressure valve 440 are closed, and the fourth media pump pressure valve 450 and the first media pump pressure valve 420 are opened, so that the seawater in the third primary pressure swing cavity area 325 on the right side flows into the third primary pressure swing cavity area 325 on the left side after flowing through the second media pump pressure valve 430, the media pump 410 and the third media pump pressure valve 440; and, the first and second brine inlets I1 and O2 are open, the first and second brine outlets O1 and I2 are closed, the residual brine can enter the first intermediate sub-chamber 532 from the first brine inlet I1 to drive the energy recovery piston 510 to move leftward, the brine in the second intermediate sub-chamber 533 can flow out from the second brine outlet O2, and the seawater in the first connection chamber 520 flows into the left third primary variable pressure cavity region 325 under the extrusion of the energy recovery piston 510, the seawater in the right third primary variable pressure cavity region 325 enters the second connection chamber 540 until the energy recovery piston 510 moves to the left limit position, as shown in fig. 6, the second top abutting block 555 abuts against the intermediate chamber control valve 550 to cause the second valve block to block the second brine outlet O2, the first valve block 552 to block the first brine inlet I1, the second intermediate sub-chamber 533 reaches the maximum, a control pump signal is generated, a pump pressure signal is transmitted to the left side to open, a pump pressure control device for controlling the pump pressure of the third brine pump 430 and the pressure of the seawater pump 410 to flow through the third primary variable pressure medium circulation valve 430 and the fourth variable pressure medium circulation device 410, such that the seawater pump 430 flows through the left third primary variable pressure medium circulation valve 430 and the fourth pressure medium circulation device 410. And when the energy recovery piston 510 moves to the extreme position of the left side, the third piston on the right side moves up to the extreme position and the third piston on the left side moves down to the extreme position.

Then, the residual concentrated brine can enter into the second intermediate sub-chamber 533 from the second concentrated brine inlet I2 to drive the energy recovery piston 510 to move rightward, the concentrated brine in the first intermediate sub-chamber 532 flows out from the first concentrated brine outlet O1, the seawater in the third primary pressure swing cavity region 325 on the left side flows into the first connection chamber 520 under the extrusion of the energy recovery piston 510, the seawater in the second connection chamber 540 enters into the third primary pressure swing cavity region 325 on the right side until the energy recovery piston 510 moves to the limit position on the right side, as shown in fig. 7, the first abutting block 554 abuts against the middle chamber control valve 550 so that the first valve block 552 blocks the first brine outlet O1, the second valve block 552 blocks the second brine inlet I2, and at this time, the pressure value of the second middle sub-chamber 533 reaches the minimum, a control signal is generated and transmitted to the medium pump circulation device to control the second medium pump pressure valve 430 and the third medium pump pressure valve 440 to be closed, and the fourth medium pump pressure valve 450 and the first medium pump pressure valve 420 to be opened, so that the seawater in the third first-stage pressure-changing cavity area 325 on the right side flows into the third first-stage pressure-changing cavity area 325 on the left side after flowing through the fourth medium pump pressure valve 450, the medium pump 410 and the first medium pump pressure valve 420. And when the energy recovery piston 510 moves to the extreme position on the right, the third piston on the left moves up to the extreme position and the third piston on the right moves down to the extreme position.

The above steps are repeated in a circulating way, so that the water quantity of the third low-pressure inlet area 324 is balanced with the water quantity of the third high-pressure outlet area 340, and the energy utilization rate is improved.

If the energy recovery piston 510 moves to the limit position on the left side, and the third piston on the right side does not move upward to the limit position, the flow rate adjustment unit on the right side will function, at this time, the second flow direction control valve 329 on the right side closes the second flow rate adjustment passage 328, the first flow direction control valve 327 opens the first flow rate adjustment passage 326, and at this time, the seawater in the third low pressure inlet region 324 on the right side flows through the first flow rate adjustment passage 326 and then enters the third primary pressure-changing cavity region 325 on the right side to pressurize the third piston on the right side until the third piston reaches the upward limit position.

Similarly, the left flow regulating unit will function when the third piston on the left side has not moved up to the limit position when the energy recovery piston 510 has moved to the limit position on the right side.

Please refer to fig. 10, which shows another embodiment of a seawater desalination system.

The seawater cooling system adopts the fluid medium pressurizing device, and the fluid medium is gas, such as air. The seawater cooling system can adopt the structure of a seawater desalination system as shown in fig. 4, the fluid medium is replaced by gas, the seawater cooling system further comprises a gas cooling device 620, the gas cooling device 620 is communicated with a fluid medium outlet and seawater to be cooled, the pressurized gas enters the gas cooling device 620 from the fluid medium outlet, and then enters the seawater 630 to be cooled from the gas cooling device 620 so as to cool the seawater 630 to be cooled, and then is discharged from the seawater 630 to be cooled in a foaming manner.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, and all equivalent variations and modifications made within the scope of the present invention and the content of the description should be included in the scope of the present invention.

Claims (19)

1. Fluid medium supercharging device, characterized by: the supercharging device includes:

the piston cylinder body is provided with a fluid medium inlet and a fluid medium outlet;

the piston is movably arranged in the piston cylinder body and positioned between the fluid medium inlet and the fluid medium outlet, the piston comprises a large piston body, a small piston body and a piston rod, two ends of the piston rod are fixedly connected with the large piston body and the small piston body respectively, the outer end surface of the large piston body corresponds to the fluid medium inlet, 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, a high-pressure outlet area is formed between the small piston body and the piston cylinder body, and a variable-pressure cavity area is defined 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 assembly can periodically change the pressure in the pressure changing cavity area, so that the pressure applied to the large piston body is different from that applied to the small piston body, the piston reciprocates under the action of pressure difference, fluid media can enter the high-pressure outlet area when the piston moves towards the low-pressure inlet area, and the fluid media in the high-pressure inlet area is outwards output and pressurized when the piston moves towards the high-pressure outlet area, so that the continuous pressurization of the fluid media is realized.

2. A fluid medium charging device as defined in claim 1, wherein: the piston comprises a first-stage piston and a second-stage piston which are arranged in series, the first-stage piston comprises a first-stage large piston body, a first-stage small piston body and a first-stage piston rod, the second-stage piston comprises a second-stage large piston body, a second-stage small piston body and a second-stage piston rod, a low-pressure inlet area is formed between the outer end face of the first-stage large piston body and the piston cylinder body, the first-stage small piston body corresponds to the second-stage large piston body, and a high-pressure outlet area is formed between the outer end face of the second-stage small piston body and the piston cylinder body; the primary large piston body inner end surface, the primary small piston body inner end surface and the piston cylinder body are enclosed to form a primary variable pressure cavity area, the secondary large piston body inner end surface, the secondary small piston body inner end surface and the piston cylinder body are enclosed to form a secondary variable pressure cavity area, and the primary variable pressure cavity area is communicated with the secondary variable pressure cavity area.

3. A fluid medium charging device as defined in claim 2, wherein: the cross-sectional area of the first-stage small piston body is smaller than that of the second-stage large piston body.

4. A fluid medium pressurizing device according to claim 1, 2 or 3, wherein: be provided with between low pressure entry area and the vary voltage cavity district and cross the runner, should cross the runner and communicate low pressure entry area and vary voltage cavity district, and be provided with the control valve on crossing the runner, trigger the control valve when the piston moves to extreme position toward high pressure outlet district direction and in order to open the runner, trigger the control valve when the piston moves to extreme position toward low pressure entry district direction and in order to close the runner.

5. A fluid medium-pressurizing device as recited in claim 3, wherein: and a connecting channel is arranged between the low-pressure inlet area and the high-pressure outlet area, the low-pressure inlet area is communicated with the high-pressure outlet area through the connecting channel, and a connecting channel check valve capable of enabling fluid media in the low-pressure inlet area to flow into the high-pressure inlet area is arranged at the connecting channel.

6. The fluid medium pressurizing device according to claim 5, wherein: the connecting channel comprises a primary connecting channel and a secondary connecting channel, the primary connecting channel vertically penetrates through the primary piston and is communicated with a low-pressure inlet area and a gap between the primary small piston body and the secondary large piston body, and the secondary connecting channel vertically penetrates through the secondary piston and is communicated with a gap between the primary small piston body and the secondary large piston body and a high-pressure outlet area; the first-stage connecting channel is provided with a first-stage connecting channel check valve, and the second-stage connecting channel is provided with a second-stage connecting channel check valve.

7. Seawater desalination system applying the fluid medium pressurizing device according to any one of claims 1 to 6, characterized in that: the seawater desalination system comprises a reverse osmosis seawater desalination device and a fluid medium supercharging device, wherein the fluid medium is seawater, the reverse osmosis seawater desalination device is provided with a high-pressure source seawater inlet, a low-pressure inlet area is communicated with seawater, and a high-pressure outlet area is communicated with the high-pressure source seawater inlet.

8. The seawater desalination system of claim 7, wherein: the pressure regulating assembly comprises a floating body and a pressure regulating cavity which is arranged on a piston cylinder body and is communicated with the pressure varying cavity all the time, the piston cylinder body is fixed below the sea surface, the floating body floats on the sea surface and can float up and down along with sea waves, the bottom end of the floating body stretches into the pressure regulating cavity, and the floating body floats up and down to periodically change the pressure in the pressure varying cavity.

9. The seawater desalination system of claim 8, wherein: the pressure regulating cavity is provided with a pressure regulating water outlet communicated with the seawater, and a pressure regulating one-way valve used for enabling the seawater in the pressure regulating cavity to flow out is arranged at the pressure regulating water outlet.

10. The seawater desalination system of claim 7, wherein: the pressure regulating subassembly is including the power station warm drainage exhaust culvert, the hydraulic turbine and the medium pump that connect gradually, be linked together through the drainage way between medium pump and the vary voltage cavity district, and be provided with the ooff valve in drainage way department, trigger when the piston removes to extreme position towards high pressure export district direction the ooff valve is in order to close the drainage way, triggers when the piston removes to extreme position towards low pressure entrance district direction the ooff valve is in order to open the drainage way.

11. A fluid medium charging device as defined in claim 1, wherein: the device comprises two fluid medium supercharging devices which share a pressure regulating component; the pressure regulating assembly comprises a medium pump circulating device, the medium pump circulating device comprises a medium pump flowing pipeline and a medium pump, two ends of the medium pump flowing pipeline are respectively communicated with the pressure-variable cavity regions of the two fluid medium supercharging devices, the medium pump circulating device enables a medium in the pressure-variable cavity region of one fluid medium supercharging device to flow to the pressure-variable cavity region of the other fluid medium supercharging device and then flow back to the pressure-variable cavity region of the original fluid medium supercharging device, and the medium pump circulating device performs circulating reciprocating motion so that when a piston of one fluid medium supercharging device moves towards the low-pressure inlet region, a piston of the other fluid medium supercharging device moves towards the high-pressure outlet region, and then the pressure and the flow of the fluid medium inlet and the fluid medium outlet are kept stable.

12. A fluid medium charging device as defined in claim 11, wherein: the medium pump of the medium pump circulating device is driven by a solar driving assembly, the solar driving assembly comprises a photovoltaic supporting rod and a photovoltaic power generation plate, and the photovoltaic power generation plate is fixedly connected to the photovoltaic supporting rod and is electrically connected with the medium pump.

13. A fluid medium charging device as defined in claim 11, wherein: the medium pump of the medium pump circulating device is driven by a wave energy driving assembly, the wave energy driving assembly is arranged in a water body environment and comprises an upper cavity, a lower cavity and a water wheel, the upper cavity is provided with a wave energy water inlet one-way valve, the lower cavity is provided with a wave energy water outlet one-way valve, the water wheel is installed between the upper cavity and the lower cavity, the medium pump is connected with the water wheel, seawater is flushed into the upper cavity from the wave energy water inlet one-way valve to push the water wheel to continuously rotate and then flows out from the wave energy water outlet one-way valve of the lower cavity, and the water wheel rotates to drive the medium pump to work.

14. The fluid medium pressurizing device as recited in claim 11, wherein: the medium pump flow-through pipelines are two and are respectively connected with the variable-pressure cavity areas of the two fluid medium supercharging devices, a by-pass pipe is arranged between the two pipelines and divides the two medium pump flow-through pipelines into four symmetrically arranged branch pipes, a medium pump pressure valve is arranged on each branch pipe, the medium pump is arranged on the by-pass pipe, and when the medium pump works, the flow direction of water flow between the variable-pressure cavity areas of the two fluid medium supercharging devices is changed through the combined action of the medium pump pressure valves.

15. A fluid medium charging device as defined in claim 11, wherein: each fluid medium supercharging device is provided with a flow regulating unit, each flow regulating unit comprises a first flow regulating channel and a second flow regulating channel, each first flow regulating channel is provided with a first flow direction control valve and a first flow regulating one-way valve, two ends of each first flow regulating channel are respectively communicated with a low-pressure inlet area and a variable-pressure cavity area of the same corresponding fluid medium supercharging device, when a piston of the corresponding fluid medium supercharging device moves to a high-pressure outlet area to a limit position, the first flow direction control valve is triggered to open the first flow regulating channel, and when the piston of the corresponding fluid medium supercharging device moves to the low-pressure inlet area to the limit position, the first flow direction control valve is triggered to close the first flow regulating channel; the two ends of the second flow regulating channel are respectively communicated with the low-pressure inlet area and the variable-pressure cavity area of the same corresponding fluid medium supercharging device, the second flow regulating channel is provided with a second flow control valve and a second flow regulating one-way valve, when a piston of the corresponding fluid medium supercharging device moves to a limit position towards a high-pressure area, the second flow control valve is triggered to close the second flow regulating channel, and when the piston of the corresponding fluid medium supercharging device moves to the limit position towards the low-pressure inlet area, the second flow control valve is triggered to open the second flow regulating channel.

16. A seawater desalination system using the fluid medium pressurizing device according to any one of claims 11 to 15, wherein the fluid medium is seawater, and the seawater desalination system comprises: the device comprises a strong brine energy recovery device, wherein the strong brine energy recovery device recovers the residual energy of strong brine of a seawater desalination system and provides additional power for the flow of water flow between pressure-changing cavity areas of two fluid medium supercharging devices;

the strong brine energy recovery device comprises an energy recovery cylinder body and an energy recovery piston, the energy recovery piston is movably connected in the energy recovery cylinder body, the energy recovery piston divides the space in the energy recovery cylinder body into a first connecting cavity, a middle cavity and a second connecting cavity which are not communicated with each other, and the first connecting cavity and the second connecting cavity are respectively communicated with the pressure-variable cavity regions of the two fluid medium supercharging devices; the middle intracavity is equipped with the baffle, the baffle separates into the middle chamber of first middle minute chamber and second middle minute chamber, wherein first middle minute chamber is equipped with first strong brine entry and first strong brine export, the second middle minute chamber is equipped with second strong brine entry and second strong brine export, and be provided with middle chamber control valve in the middle intracavity, the steerable first strong brine entry of this middle chamber control valve and second strong brine export are opened simultaneously and first strong brine export and second strong brine entry are closed simultaneously, perhaps first strong brine entry and second strong brine export are closed simultaneously and first strong brine export and second strong brine entry are opened simultaneously.

17. The seawater desalination system of claim 16, wherein: first strong brine entry and first strong brine export and second strong brine entry and second strong brine export arrange side by side and are located the both sides of baffle respectively, middle chamber control valve includes the valve rod and the first valve piece of rigid coupling at the valve rod both ends, second valve piece respectively, valve rod and baffle swing joint, energy recovery piston both sides wall is equipped with first top respectively and supports the piece and support the piece with the second top, and the second top supports the piece when the energy recovery piston removes to the extreme position of one side wherein and supports the valve rod so that second valve piece shutoff second strong brine entry, the first strong brine export of first valve piece shutoff, first top support the piece top when the energy recovery piston removes to the extreme position of opposite side and support the valve rod so that first valve piece shutoff first strong brine entry, second valve piece shutoff second strong brine export.

18. The seawater desalination system of claim 16, wherein: the pressure signals of the first middle sub-cavity and the second middle sub-cavity trigger the opening and closing actions of a medium pump pressure valve, when the first middle sub-cavity is high in pressure and the second middle sub-cavity is low in pressure, a control valve on one group of oblique symmetrical branch pipes is closed, a control valve on the other group of oblique symmetrical branch pipes is opened, and when the first middle sub-cavity is low in pressure and the second middle sub-cavity is high in pressure, the medium pump pressure valve does opposite actions to ensure that the medium pump and the strong brine energy recovery device synchronously control the water flow direction.

19. A seawater cooling system using the fluid medium pressurizing device according to claim 11, wherein: the fluid medium is gas, the seawater cooling system further comprises a gas cooling device, the gas cooling device is communicated with the fluid medium outlet and the seawater to be cooled, the gas after pressure boosting enters the gas cooling device from the fluid medium outlet, then enters the seawater to be cooled from the gas cooling device, is cooled to the seawater to be cooled, and is discharged from the seawater to be cooled in a foaming mode.

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