CN110723782A - Sea water desalting device - Google Patents
Sea water desalting device Download PDFInfo
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- CN110723782A CN110723782A CN201910765476.7A CN201910765476A CN110723782A CN 110723782 A CN110723782 A CN 110723782A CN 201910765476 A CN201910765476 A CN 201910765476A CN 110723782 A CN110723782 A CN 110723782A
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- seawater
- reverse osmosis
- osmosis membrane
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A seawater desalination device aims to solve the technical problems that in the prior art, the seawater desalination mode of pressurizing seawater through external energy supply to realize reverse osmosis desalination has high energy consumption, and further causes high water production cost and poor economical efficiency. The seawater desalination device comprises a reverse osmosis membrane used for desalinating seawater, wherein the reverse osmosis membrane is arranged in the desalinator, a desalination chamber of the desalinator is divided into a seawater chamber and a fresh water chamber by the reverse osmosis membrane, a water inlet communicated with the seawater is formed in the side wall, close to the reverse osmosis membrane, of the seawater chamber, a one-way valve used for preventing seawater from flowing out of the seawater chamber is arranged at the water inlet, a pressure maintaining port communicated with the seawater all the time is formed in the side wall, far away from the reverse osmosis membrane, of the seawater chamber, a piston capable of compressing the seawater flowing from the seawater chamber to the fresh water chamber through the reverse osmosis membrane is arranged in the seawater chamber, one end, far away from the reverse osmosis membrane, of the piston is connected with.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to a seawater desalination device.
Background
Currently, offshore seawater desalination is mainly based on vacuum distillation, electrodialysis and reverse osmosis, and among them, reverse osmosis is widely used. However, the traditional pressurizing reverse osmosis method has the problems of high energy consumption, poor effluent quality and serious membrane pollution, and causes the problems of high water production cost and poor economical efficiency.
Chinese patent application No. CN 201120532334.5 discloses a deep water reverse osmosis seawater desalination device, which comprises a seawater extraction device, a pre-treatment device, a semi-permeable membrane module, a fresh water recovery device, and a concentrated water discharge device, wherein the semi-permeable membrane module is installed below the sea level and below the water depth required by the semi-permeable membrane for reverse osmosis, the fresh water recovery device comprises a fresh water chamber and a fresh water pump in the fresh water chamber, the semi-permeable membrane module is installed on a permeable window on the wall of the fresh water chamber, the seawater side of the semi-permeable membrane module is outside the fresh water chamber, and the fresh water side is inside the fresh water chamber; the seawater extraction device is a seawater chamber enclosed outside the fresh water chamber, the seawater chamber is provided with a seawater inlet and a concentrated water outlet, a pre-treatment device is arranged at the seawater inlet, a raw water inlet of the pre-treatment device is arranged outside the seawater chamber, and a pretreated seawater outlet is arranged inside the seawater chamber; the concentrated water discharge device is a concentrated water outlet of the seawater chamber, or the concentrated water outlet is also provided with a drainage pump.
The pump body used in the patent is a hand pump, the device is not influenced by external environment and conditions in working, seawater desalination can be realized by only manually pushing the rocking handle, the device has strong environmental adaptability and convenient operation, and the whole device has high integration level, small volume, light weight and convenient carrying; the device adopts a double-piston pump to operate in a reciprocating complementary mode to produce water, and compared with a single-piston hand pump seawater desalination device for the same person, the device has the advantages of large water production, small flow fluctuation and high water production efficiency; however, the utility model selects the hand pump to provide the required separation pressure of reverse osmosis membrane, and the efficiency of sea water desalination is lower, is not suitable for large-scale sea water desalination.
Chinese patent application No. CN 201710636256.5 discloses a tidal energy-gathered reverse osmosis seawater desalination system and method boosted by a hydraulic ram, which includes: the device comprises an upper reservoir for collecting tides, a pipeline with a control valve is connected with a power water pipe of at least one hydraulic ram pump arranged in a tail water tank, a water outlet pipe of the hydraulic ram pump is connected with a low-pressure reverse osmosis seawater desalination device, and a check valve which is opened to the open sea is arranged at the position, close to the bottom, of the side wall of the tail water tank; the tide-facing surface of the upper reservoir inclines inwards by 0-30 degrees; the upper storage is provided with at least one side wall which is contacted with the tide water, and at least two check valves which are opened to the interior of the upper storage are arranged on the side wall which is contacted with the tide water along the vertical direction; the top elevation of the upper storehouse is 0.5 m higher than the high tide level, and the bottom elevation is the low tide level.
The invention utilizes the high-efficiency, wide-working-area and strong-adaptability automatic water pumping equipment of the hydraulic ram pump to generate 1.5 ~ 2.0.0 MPa high-pressure water for low-pressure reverse osmosis seawater desalination, utilizes the hydraulic ram pump to convert unstable low-fall water energy of tide into stable high-pressure water energy which is used as source power of low-pressure reverse osmosis seawater desalination technology, directly converts low-head energy of tide into seawater desalination energy, reduces energy conversion links and improves energy conversion efficiency, and the hydraulic ram pump is a mature water pumping device, is simple to manufacture, reliable to use and low in manufacturing, using and maintaining costs.
Disclosure of Invention
The invention provides a seawater desalination device, aiming at overcoming the technical problems that in the prior art, the seawater desalination mode of pressurizing seawater by external energy supply to realize reverse osmosis desalination has high energy consumption, so that the water production cost is high and the economy is poor, the device uses the impact energy and the wind energy of the seawater to realize the pressurization reverse osmosis desalination of the seawater, an additional energy supply device is not needed in the desalination process, the seawater clean desalination is realized, the water production cost is reduced, and the desalination device has excellent economy.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a sea water desalination device, include the reverse osmosis membrane for desalinating sea water, reverse osmosis membrane establishes inside the desalination device, reverse osmosis membrane separates the desalination room of desalination device for sea water room and fresh water room, be equipped with the water inlet with the sea water intercommunication on the lateral wall that the sea water room is close to reverse osmosis membrane, water inlet department is equipped with the check valve that prevents sea water outflow sea water room, be equipped with the pressurize mouth with the sea water intercommunication all the time on the lateral wall that reverse osmosis membrane was kept away from to the sea water room, be equipped with the piston that compressible sea water passes through reverse osmosis membrane flow direction fresh water room from the sea water room in the sea water room, the piston is kept away from reverse osmosis membrane's one end and is passed through drive mechanism and link to each other with.
When the reverse osmosis method is selected for sea water desalination in the prior art, in order to accelerate the speed of a solvent penetrating through the reverse osmosis membrane, the sea water is pressurized by external energy supply, and in the large-scale sea water desalination production process, the energy supply and the pressurization are main cost consumption links. The invention provides a seawater desalination device, aiming at solving the technical problems of high water production cost and poor economy caused by higher energy consumption of a seawater desalination method for realizing reverse osmosis desalination by pressurizing seawater through external energy supply in the prior art. Because the specific heat capacity of the seawater is larger than that of the land, the temperature rising and reducing amplitude and the temperature reducing and reducing speed of the seawater are far lower than those of the land, and large air convection can be formed between the seawater and the land due to the temperature difference, so that abundant wind power resources are always present in the offshore position, and the seawater flows rapidly under the action of wind power and tides; the rotating mechanism continuously rotates under the action of flowing seawater and airflow, the rotating mechanism drives the piston to reciprocate in the seawater chamber through the transmission mechanism while rotating, the seawater in the seawater chamber is compressed when the piston moves close to the reverse osmosis membrane, the seawater rapidly flows through the reverse osmosis membrane to complete desalination treatment, the water inlet is opened when the piston moves away from the reverse osmosis membrane, and the seawater is supplemented to the seawater chamber, so that a desalination cycle is completed. The device uses the impact energy and the wind energy of the seawater to realize the pressurization reverse osmosis desalination of the seawater, does not need an additional energy supply device in the desalination process, reduces the water production cost while realizing the clean desalination of the seawater, and has excellent economy of the desalination device
Preferably, a water outlet is arranged on the side wall of the fresh water chamber far away from the reverse osmosis membrane, and the other end of the drain pipe with one end connected with the water outlet is connected with a centrifugal pump used for pumping fresh water out of the fresh water chamber.
In the process of seawater desalination, desalinated water generated in a desalination cycle is continuous, when the amount of fresh water in a fresh water chamber is large, the pressure difference between two sides of a reverse osmosis membrane is reduced, a solvent in a seawater chamber needs to pass through the reverse osmosis membrane to flow into the fresh water chamber and needs large driving pressure, at the moment, the driving energy needed by a rotating mechanism is increased, and the seawater desalination efficiency is reduced; according to the invention, the side wall of the fresh water chamber, which is far away from the reverse osmosis membrane, is provided with the water outlet, the other end of the drain pipe, one end of which is connected with the water outlet, is connected with the centrifugal pump for pumping fresh water out of the fresh water chamber, the desalted water in the fresh water chamber is continuously pumped out by the centrifugal pump, the desalted water in the fresh water chamber is always kept at a lower water level, the pressure difference between two sides of the reverse osmosis membrane is larger, the driving energy required by the rotating mechanism for realizing a seawater desalination cycle is smaller, the desalination device can still work normally when the impact energy and wind energy of seawater are smaller, the threshold.
Preferably, the cross sections of the seawater chamber and the fresh water chamber are rectangular.
The technical scheme limits the cross section shapes of the seawater chamber and the fresh water chamber, and particularly, the cross sections of the seawater chamber and the fresh water chamber are rectangular.
Preferably, the movement direction of the piston is the same as the normal direction of the reverse osmosis membrane.
The motion direction of the piston is consistent with the normal direction of the reverse osmosis membrane, so that the mechanical energy of the piston can be converted into the kinetic energy of the seawater to be desalinated in the seawater chamber to the maximum extent, the seawater is driven to penetrate through the reverse osmosis membrane to be desalinated, the utilization rate of the energy transmitted by the rotating mechanism is improved, and the desalination efficiency of the desalination device is maintained at a high level.
Preferably, the rotating mechanism comprises a roller and a mounting bracket, the mounting bracket in a trapezoid frame shape comprises a first bracket and a second bracket, the first bracket and the second bracket are symmetrically arranged at two ends of the roller, two ends of the rotating shaft are respectively fixedly connected with the first bracket and the second bracket, and the roller is movably sleeved with the rotating shaft.
The technical scheme limits the rotating mechanism, specifically, the rotating mechanism comprises a roller and a mounting bracket, a first bracket and a second bracket are symmetrically arranged at two ends of the roller, two ends of a rotating shaft are respectively fixedly connected with the first bracket and the second bracket, and the roller is movably sleeved with the rotating shaft; when seawater or airflow impacts the roller, the roller rotates to drive the transmission mechanism to move, the transmission mechanism reciprocates once under the driving of the roller every time the roller rotates for a circle, and the piston completes a desalination cycle under the driving of the transmission mechanism.
Preferably, the roller includes a concentric mounting hole penetrating along a length direction thereof, and the rotation shaft is in clearance fit with the mounting hole.
The rotating shaft and the mounting hole form clearance fit, and the friction between the roller and the rotating shaft is small when the roller rotates under the action of seawater impact energy and wind energy, so that the utilization rate of the seawater impact energy and the wind energy is effectively improved.
Preferably, the rollers comprise a first roller and a second roller which are arranged at intervals along the length direction of the rollers, the first roller and the second roller are fixedly connected through a reinforcing rod along the length direction of the rollers, one end of the transmission mechanism is fixedly connected with the reinforcing rod, and the other end of the transmission mechanism is fixedly connected with one end, far away from the reverse osmosis membrane, of the piston.
In order to ensure that the transmission mechanism can move continuously and unimpededly, the first rollers and the second rollers which are arranged at intervals are fixedly connected through reinforcing rods along the length direction of the rollers, one end of the transmission mechanism is fixedly connected with the reinforcing rods, and the other end of the transmission mechanism is fixedly connected with one end of the piston, which is far away from the reverse osmosis membrane; the motion area of the transmission mechanism is limited in the gap between the first roller and the second roller, and the friction of the transmission mechanism is small.
Preferably, the transmission mechanism is a crank connecting rod, the crank is fixedly connected with the reinforcing rod, and the connecting rod is fixedly connected with the piston.
The invention reversely utilizes the crank and the connecting rod, the crank is used as a driving end, and the connecting rod is used as a driven end, thereby converting the rotary motion of the roller into the reciprocating motion of the piston.
Preferably, the mounting bracket comprises a large end and a small end, the large end is fixedly connected with the seabed, and the small end is fixedly connected with the rotating shaft.
Above-mentioned technical scheme has injectd the installing support, and is concrete, and the installing support includes main aspects and tip, main aspects and seabed fixed connection, tip and pivot fixed connection.
Preferably, the reverse osmosis membrane is an ultra-low pressure reverse osmosis membrane.
The ultra-low pressure reverse osmosis membrane has high desalination rate, large water flux, strong pollution resistance and bacterial erosion resistance, has neutral surface potential and good hydrophilicity due to the special surface structure, is different from the common reverse osmosis membrane which is easy to adsorb surface active substances and is blocked by dirt, and can prolong the service life of the reverse osmosis membrane used for desalination while improving the desalination efficiency.
In conclusion, the invention has the following beneficial effects: (1) the device uses the impact energy and wind energy of seawater to realize the pressurization reverse osmosis desalination of the seawater, an additional energy supply device is not needed in the desalination process, the seawater cleaning desalination is realized, the water production cost is reduced, and the desalination device has excellent economy; (2) the ultra-low pressure reverse osmosis membrane is selected as the reverse osmosis membrane, so that the service life can be prolonged while the desalination efficiency is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a different label of the same schematic as fig. 1.
FIG. 3 is a schematic view of the rollers and reinforcing rods of the present invention.
In the figure:
1. the device comprises a reverse osmosis membrane, 2, a desalter, 3, a desalting chamber, 4, a seawater chamber, 5, a fresh water chamber, 6, a water inlet, 7, a one-way valve, 8, a pressure maintaining port, 9, a piston, 10, a water outlet, 11, a water outlet pipe, 12, a centrifugal pump, 13, a roller, 131, a mounting hole, 13a, a first roller, 13b, a second roller, 13c, a reinforcing rod, 14, a mounting bracket, 141, a big end, 142, a small end, 15, a rotating shaft, 16, a crank, 17 and a connecting rod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1 to 3, a seawater desalination device comprises a reverse osmosis membrane 1 for desalinating seawater, wherein the reverse osmosis membrane is arranged inside a desalinator 2, the reverse osmosis membrane divides a desalination chamber 3 of the desalinator into a seawater chamber 4 and a fresh water chamber 5, a water inlet 6 communicated with seawater is arranged on the side wall of the seawater chamber close to the reverse osmosis membrane, a one-way valve 7 for preventing seawater from flowing out of the seawater chamber is arranged at the water inlet, a pressure maintaining port 8 always communicated with seawater is arranged on the side wall of the seawater chamber far away from the reverse osmosis membrane, a piston 9 for compressing seawater to flow from the seawater chamber to the fresh water chamber through the reverse osmosis membrane is arranged in the seawater chamber, one end of the piston far away from the reverse osmosis membrane is connected with a rotating mechanism on the sea surface through a transmission mechanism, and the rotating mechanism; a water outlet 10 is arranged on the side wall of the fresh water chamber far away from the reverse osmosis membrane, and the other end of a water outlet pipe 11 with one end connected with the water outlet is connected with a centrifugal pump 12 for pumping fresh water out of the fresh water chamber; the sections of the seawater chamber and the fresh water chamber are rectangular; the motion direction of the piston is consistent with the normal direction of the reverse osmosis membrane; the rotating mechanism comprises a roller 13 and a mounting bracket 14, the mounting bracket in a trapezoid frame shape comprises a first bracket and a second bracket, the first bracket and the second bracket are symmetrically arranged at two ends of the roller, two ends of a rotating shaft 15 are respectively fixedly connected with the first bracket and the second bracket, and the roller is movably sleeved with the rotating shaft; the roller comprises a concentric mounting hole 131 which is penetrated along the length direction of the roller, and the rotating shaft and the mounting hole form clearance fit; the roller wheels comprise a first roller wheel 13a and a second roller wheel 13b which are arranged at intervals along the length direction of the roller wheels, the first roller wheel and the second roller wheel are fixedly connected through a reinforcing rod 13c along the length direction of the roller wheels, one end of the transmission mechanism is fixedly connected with the reinforcing rod, and the other end of the transmission mechanism is fixedly connected with one end of the piston, which is far away from the reverse osmosis membrane; the transmission mechanism is a crank connecting rod, a crank 16 is fixedly connected with the reinforcing rod, and a connecting rod 17 is fixedly connected with the piston; the mounting bracket comprises a large end 141 and a small end 142, the large end is fixedly connected with the seabed, and the small end is fixedly connected with the rotating shaft; the reverse osmosis membrane is an ultra-low pressure reverse osmosis membrane.
The concrete structure of the invention is as follows: the desalination device is cubic, the desalination chamber is a cubic space arranged in the desalination device, the desalination chamber is divided into a fresh water chamber and a seawater chamber by a reverse osmosis membrane along the length direction of the desalination chamber, and the fresh water chamber and the seawater chamber are cubic cavities; the volume of the seawater chamber is larger than that of the fresh water chamber, because the fresh water purified in the fresh water chamber needs to be continuously pumped out, the seawater chamber is larger than the fresh water chamber, and the seawater desalination treatment can be completed in one desalination cycle as much as possible under the condition that the volume of the desalination chamber is fixed; the water outlet arranged on the side wall of the fresh water chamber far away from the reverse osmosis membrane is connected with one end of the water drain pipe, the other end of the water drain pipe is connected with the centrifugal pump, and the centrifugal pump continuously pumps out fresh water in the fresh water chamber under the driving of the motor, so that the pressure difference at two sides of the reverse osmosis membrane is kept at a higher level; a water inlet is formed in the side wall, perpendicular to the reverse osmosis membrane, of the seawater chamber, a one-way valve facing the interior of the seawater chamber is arranged at the water inlet, a pressure maintaining port is formed in the side wall, parallel to the reverse osmosis membrane, of the seawater chamber and far away from the reverse osmosis membrane, a piston capable of compressing seawater flowing from the seawater chamber to the fresh water chamber through the reverse osmosis membrane is arranged in the seawater chamber, and one end, far away from the reverse osmosis membrane, of the piston is connected with a rotating; when the seawater desalination treatment is not carried out, the piston is positioned at one end of the seawater chamber far away from the reverse osmosis membrane, seawater flows into the seawater chamber from the water inlet, when the seawater chamber is filled with seawater, the desalination device starts to work, the piston moves close to the reverse osmosis membrane under the drive of the transmission mechanism, the seawater in the seawater chamber is compressed and quickens to pass through the reverse osmosis membrane, the seawater in the seawater chamber cannot flow out along the water inlet due to the stopping action of the one-way valve in the process, when the piston is tightly attached to the reverse osmosis membrane, the seawater in the seawater chamber is completely desalinated, the seawater chamber is maintained in an filling state due to the continuous inflow of the seawater in the pressure maintaining port, the piston moves far away from the reverse osmosis membrane under the drive of the transmission mechanism, the seawater chamber positioned between the piston and the reverse osmosis membrane is filled with the seawater flowing in from the water inlet, the seawater in the seawater chamber at one side of the, and completing a seawater desalination cycle, wherein the rotating mechanism rotates for one circle in the process.
The desalination device can be fixed on the sea bottom of the sea, when the piston is driven by the transmission mechanism to move close to the reverse osmosis membrane, the pressure maintaining port on one side of the piston, which is far away from the reverse osmosis membrane, communicates the seawater chamber with the sea, one part of driving force in the movement process of the piston is driven by the transmission mechanism, and the other part of the driving force is provided by the seawater pressure; when the piston is driven by the transmission mechanism to move away from the reverse osmosis membrane, the water inlet at one side of the piston close to the reverse osmosis membrane communicates the seawater chamber with the sea, and the driving force in the piston movement process is also provided by the transmission mechanism and the seawater pressure together; at the moment, the driving force provided by the transmission mechanism is lower, and the application occasions of the desalination device are greatly widened.
Claims (10)
1. The utility model provides a sea water desalination device, including the reverse osmosis membrane for desalinating sea water, a serial communication port, reverse osmosis membrane establishes inside the desalination device, reverse osmosis membrane separates the desalination room of desalination device for sea water room and fresh water room, be equipped with the water inlet with the sea water intercommunication on the lateral wall that the sea water room is close to reverse osmosis membrane, water inlet department is equipped with the check valve that prevents the sea water rivers and go out the sea water room, be equipped with the pressurize mouth with the sea water intercommunication all the time on the lateral wall that reverse osmosis membrane was kept away from to the sea water room, be equipped with the piston that compressible sea water passed through reverse osmosis membrane flow direction fresh water room from the sea water room in the sea water room, the piston is kept away from reverse osmosis membrane's one end and is passed through drive mechanism.
2. The seawater desalination apparatus of claim 1, wherein a water outlet is provided on a side wall of the fresh water chamber away from the reverse osmosis membrane, and a centrifugal pump for pumping fresh water from the fresh water chamber is connected to the other end of the water outlet pipe connected to the water outlet.
3. The seawater desalination device of claim 1, wherein the seawater chamber and the fresh water chamber are rectangular in cross section.
4. A seawater desalination plant as claimed in claim 1 wherein the direction of movement of the piston is aligned with the normal to the reverse osmosis membrane.
5. The seawater desalination device of claim 1, wherein the rotation mechanism comprises a roller and a mounting bracket, the mounting bracket in a trapezoid frame shape comprises a first bracket and a second bracket, the first bracket and the second bracket are symmetrically arranged at two ends of the roller, two ends of the rotation shaft are respectively fixedly connected with the first bracket and the second bracket, and the roller is movably sleeved with the rotation shaft.
6. A seawater desalination plant as claimed in claim 5 wherein the roller comprises concentric mounting holes running through it along its length, the shaft forming a clearance fit with the mounting holes.
7. The seawater desalination device of claim 5, wherein the rollers comprise a first roller and a second roller which are arranged at intervals along the length direction of the rollers, the first roller and the second roller are fixedly connected through a reinforcing rod along the length direction of the rollers, one end of the transmission mechanism is fixedly connected with the reinforcing rod, and the other end of the transmission mechanism is fixedly connected with one end of the piston, which is far away from the reverse osmosis membrane.
8. The seawater desalination device of claim 7, wherein the transmission mechanism is a crank connecting rod, the crank is fixedly connected with the reinforcing rod, and the connecting rod is fixedly connected with the piston.
9. A seawater desalination plant as claimed in claim 5 wherein the mounting bracket comprises a large end and a small end, the large end being fixedly connected to the seabed and the small end being fixedly connected to the rotatable shaft.
10. The seawater desalination plant of claim 1, 2, 3, 4 or 5, wherein the reverse osmosis membrane is an ultra-low pressure reverse osmosis membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765476.7A CN110723782A (en) | 2019-08-19 | 2019-08-19 | Sea water desalting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765476.7A CN110723782A (en) | 2019-08-19 | 2019-08-19 | Sea water desalting device |
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| CN110723782A true CN110723782A (en) | 2020-01-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250142A (en) * | 2020-11-05 | 2021-01-22 | 郗廷辉 | Install rainwater purifier on vapour car roof |
| CN112829876A (en) * | 2021-01-27 | 2021-05-25 | 安徽工程大学 | Self-power-generation type offshore buoy with seawater desalination capacity |
| CN115991520A (en) * | 2023-03-23 | 2023-04-21 | 自然资源部第一海洋研究所 | Seawater desalination device and seawater desalination control method |
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