CN115557573A - Sea wave driven parallel self-adaptive reverse osmosis seawater desalination system and method - Google Patents
Sea wave driven parallel self-adaptive reverse osmosis seawater desalination system and method Download PDFInfo
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- CN115557573A CN115557573A CN202211190523.8A CN202211190523A CN115557573A CN 115557573 A CN115557573 A CN 115557573A CN 202211190523 A CN202211190523 A CN 202211190523A CN 115557573 A CN115557573 A CN 115557573A
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- 239000013535 sea water Substances 0.000 title claims abstract description 152
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 79
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 44
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000007667 floating Methods 0.000 claims description 31
- 230000003044 adaptive effect Effects 0.000 claims description 20
- 239000012267 brine Substances 0.000 claims description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 13
- 239000013505 freshwater Substances 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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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Abstract
The invention belongs to the technical field of seawater desalination, and particularly relates to a parallel self-adaptive reverse osmosis seawater desalination system driven by sea waves and a method thereof, wherein the parallel self-adaptive reverse osmosis seawater desalination system comprises the following steps: seawater pretreatment equipment; the pretreatment reservoir is communicated with a water outlet pipe of the seawater pretreatment device and is communicated with the buffer tank through a seawater inlet pipeline; a through hole provided with a check valve is formed in the side surface of the seawater inlet pipeline close to the side of the pretreatment water storage pool; a plurality of buffer tank water outlet pipes are arranged above the buffer tanks, each buffer tank water outlet pipe is communicated with a pressure reducing and stabilizing valve, and each pressure reducing and stabilizing valve is communicated with a reverse osmosis membrane group; each reverse osmosis membrane group is provided with a first water outlet pipe and a second water outlet pipe. According to the change of sea waves, the number of reverse osmosis membrane groups working in parallel is switched, and the stable and efficient operation of the system is realized.
Description
Technical Field
The disclosure belongs to the technical field of seawater desalination, and particularly relates to a parallel self-adaptive reverse osmosis seawater desalination system driven by sea waves and a method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The shortage of fresh water resources in China is serious, and the method is one of 21 water-poor countries in the world; meanwhile, china is a large ocean country, the total length of a coastline occupies the 3 rd position in the world, and coastal areas are the frontier and the core of national economic development and are also areas with the most shortage of fresh water resources. The shortage of fresh water becomes one of the bottlenecks restricting the sustainable development of the society, and the ocean contains a huge amount of fresh water, so that the water is needed to the sea, and the development of the seawater desalination technology becomes an important way for solving the shortage of the fresh water in China.
The mainstream technology of seawater desalination at present comprises a membrane method and a thermal method; however, the steam heat compression low-temperature multi-effect distillation method has the advantages of low requirement on seawater pretreatment, low process cycle power consumption, high product fresh water quality and the like; the reverse osmosis membrane method has the advantages of low investment, short construction period, low energy consumption, large-scale use and the like.
Sea waves generally refer to waves generated by wind in the ocean, and are a wave phenomenon occurring in the ocean, mainly including waves, swell and ocean seagoing waves. Sea waves are the propagation of the undulating shape of the sea surface, and are a wave formed by water particles leaving an equilibrium position, vibrating periodically and propagating in a certain direction. The vibration energy of water particles forms kinetic energy and the wave energy produces potential energy, and the cumulative amount of the two energies is surprising. In global oceans, the total energy of only the storms and swells is equivalent to half the solar energy reaching the outside of the earth. Therefore, the method for driving the seawater desalination system by the reverse osmosis membrane method by utilizing the potential energy generated by the fluctuation of sea waves is a green, environment-friendly and effective method for utilizing the ocean energy.
It is known to the inventors that the size of sea waves varies greatly under different wind speeds, wind directions and terrain conditions, with periods of typically a fraction of a second to tens of seconds, wavelengths of a few tens of centimeters to hundreds of meters, wave heights of a few centimeters to 20 meters, and wave heights of up to 30 meters or more in rare terrain. However, when the reverse osmosis seawater desalination system is operated, the reverse osmosis membrane needs to be operated under a stable pressure, otherwise the efficiency and the service life of the membrane are reduced. Therefore, how to balance the relationship between the huge change of sea waves and the efficient and stable operation of the reverse osmosis membrane is a great challenge in directly driving the reverse osmosis seawater desalination system by using the sea waves.
Disclosure of Invention
In order to solve the problems, the invention provides a parallel self-adaptive reverse osmosis seawater desalination system driven by sea waves and a method thereof.
According to some embodiments, a first aspect of the present disclosure provides a wave-driven parallel adaptive reverse osmosis seawater desalination system, which adopts the following technical solutions:
a sea wave driven parallel adaptive reverse osmosis seawater desalination system comprising:
seawater pretreatment equipment;
the pretreatment reservoir is communicated with a water outlet pipe of the seawater pretreatment device and is communicated with the buffer tank through a seawater inlet pipeline; a through hole provided with a check valve is formed on the side surface of the seawater inlet pipeline close to the side of the pretreatment water storage pool; a plurality of buffer tank water outlet pipes are arranged above the buffer tanks, each buffer tank water outlet pipe is communicated with a pressure reducing and stabilizing valve, and each pressure reducing and stabilizing valve is communicated with a reverse osmosis membrane group; each reverse osmosis membrane group is provided with a first water outlet pipe and a second water outlet pipe.
As a further technical limitation, the water inlet pipe of the seawater pretreatment device is communicated with open seawater.
As a further technical limitation, a piston, a floating ball, and a connecting rod connecting the piston and the floating ball are disposed inside the seawater inlet pipe close to the side of the pretreatment reservoir.
Further, the diameter of the piston is matched with the inner diameter of the seawater inlet pipeline; the diameter of the floating ball is smaller than the inner diameter of the pre-seawater inlet pipeline.
As a further technical limitation, the check valve is a one-way valve.
As a further technical limitation, each first water outlet pipe is communicated with a fresh water collecting device, and each second water outlet pipe is communicated with a brine tank; and a brine tank water outlet pipe is arranged at the bottom of the brine tank.
As a further technical limitation, the bottom of the buffer tank is provided with a pressure sensor.
According to some embodiments, a second aspect of the present disclosure provides a sea wave driven parallel adaptive reverse osmosis seawater desalination method, which uses the sea wave driven parallel adaptive reverse osmosis seawater desalination system provided in the first aspect, and adopts the following technical solution:
a sea wave driven parallel self-adaptive reverse osmosis seawater desalination method comprises the following steps:
pretreating the obtained open sea water to remove impurities and pollutants in the sea water;
the pretreated seawater enters a pretreatment reservoir through a water outlet pipe of the seawater pretreatment device, and the pretreated seawater is controlled by a floating ball and a piston to enter a buffer tank through a seawater inlet pipeline under the action of a check valve;
the number of the pressure reducing and stabilizing valves and the reverse osmosis membrane groups which participate in the work is controlled by judging the size between the seawater pressure in the buffer tank and the working pressure of the reverse osmosis membrane group, so that the seawater desalination requirements of sea waves of different grades are met.
As a further technical limitation, the process that the seawater after being controlled and treated by the floating ball and the piston enters the buffer tank through the seawater inlet pipeline is as follows:
the floating ball moves up and down on the sea surface along with the change of sea waves, when the sea waves fall back, the floating ball drives the piston to move down, the pressure is reduced after air in the seawater inlet pipeline is removed, the valve clack in the check valve is pushed open under the action of the seawater pressure of the pretreatment reservoir, the check valve is in a positive flow state, and the seawater in the pretreatment reservoir is sucked into the inlet pipeline;
when the sea waves rise to push the floating ball to drive the piston to move upwards, the sea water in the sea water inlet pipeline is pressurized and sent into the buffer tank, and due to the one-way liquidity of the check valve, the sea water can only enter the buffer tank through the sea water inlet pipeline and cannot flow out of the check valve.
As a further technical limitation, when the sea wave grade is increased, the movement frequency and amplitude of the floating ball are increased, and the pressure of the seawater entering the buffer tank is increased; when the sea wave grade is reduced, the pressure of the sea water entering the buffer tank is reduced, and the sea wave grade can be judged by detecting the pressure of the sea water in the buffer tank.
Compared with the prior art, this disclosed beneficial effect does:
the reverse osmosis seawater desalination system is directly driven by utilizing the wave energy, no intermediate energy conversion device is needed, other energy is not needed for driving, the direct utilization of the wave energy can be realized, and the reverse osmosis seawater desalination system is green and efficient; according to the change of sea waves, the stable and efficient operation of the system is realized by controlling the pressure reducing and stabilizing valves and switching the number of the reverse osmosis membrane groups working in parallel, so that the sea water desalination system can adapt to the sea waves of different levels, and the maximum utilization of the sea wave energy is realized. When the sea wave grade is smaller, the pressure of the sea water entering the buffer tank is smaller, a pressure reducing and stabilizing valve is opened, and a single reverse osmosis membrane group works; when the sea wave grade is larger, the pressure of the sea water entering the buffer tank is larger, and the number of the pressure reducing and stabilizing valves for working is adjusted according to the pressure of the sea water in the buffer tank, so that a plurality of reverse osmosis membrane groups work simultaneously to adapt to different sea wave grades.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a schematic structural diagram of a wave-driven parallel adaptive reverse osmosis desalination system according to a first embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a parallel adaptive reverse osmosis desalination method driven by sea waves according to a second embodiment of the disclosure;
the seawater pretreatment device comprises 1, outer seawater, 2, seawater pretreatment equipment, 3, a pretreatment reservoir, 4, a floating ball, 5, a piston, 6, a check valve, 7, a seawater inlet pipeline, 8, a buffer tank, 9, a pressure reducing and stabilizing valve, 10, a reverse osmosis membrane group, 11, a first water outlet pipe, 12, a second water outlet pipe, 13, a fresh water collecting device, 14, a brine pond, 15, a brine pond water outlet pipe, 16, a connecting rod, 17 and a pressure sensor.
Detailed Description
The present disclosure is further illustrated by the following examples in conjunction with the accompanying drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, are only terms of relationships determined for convenience in describing structural relationships of the components or elements of the present disclosure, do not refer to any components or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected," "connected," and the like should be understood broadly, and mean that they may be fixedly connected, integrally connected, or detachably connected; may be directly connected or indirectly connected through an intermediate. For persons skilled in the art, the specific meanings of the above terms in the present disclosure can be determined according to specific situations, and are not to be construed as limitations of the present disclosure.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example one
The first embodiment of the disclosure introduces a parallel self-adaptive reverse osmosis seawater desalination system driven by sea waves.
As shown in fig. 1, the sea wave driven parallel adaptive reverse osmosis seawater desalination system comprises a seawater pretreatment device 2, a pretreatment reservoir 3, a floating ball 4, a piston 5, a check valve 6, a seawater inlet pipe 7, a buffer tank 8, a pressure reducing and stabilizing valve 9, a reverse osmosis membrane group 10, a first water outlet pipe 11, a second water outlet pipe 12, a fresh water collecting device 13, a brine tank 14, a brine tank water outlet pipe 15, a connecting rod 16 and a pressure sensor 17;
specifically, a water inlet pipe of the seawater pretreatment device 2 is communicated with the open seawater 1, a water outlet pipe of the seawater pretreatment device 2 is communicated with a pretreatment reservoir 3, and the pretreatment reservoir 3 is communicated with a buffer tank 8 through a seawater inlet pipe 7; a through hole provided with a check valve 6 is arranged on the side surface of the seawater inlet pipeline 7 close to the side of the pretreatment reservoir 3; a piston 5, a floating ball 4 and a connecting rod 16 for connecting the piston 5 and the floating ball 4 are arranged in the seawater inlet pipe 7 close to the side of the pretreatment reservoir 3; a plurality of buffer tank water outlet pipes are arranged above the buffer tank 8, a pressure sensor 17 is arranged below the buffer tank 8, the buffer tank water outlet pipes are communicated with pressure reducing and stabilizing valves 9, and each pressure reducing and stabilizing valve 9 is communicated with the reverse osmosis membrane group 10; each reverse osmosis membrane group 10 is provided with a first water outlet pipe 11 and a second water outlet pipe 12; each first water outlet pipe 11 is communicated with a fresh water collecting device 13, each second water outlet pipe 12 is communicated with a brine tank 14, and a brine tank water outlet pipe 15 is arranged at the bottom of the brine tank 14.
In the embodiment, the diameter of the piston 5 is matched with the inner diameter of the seawater inlet pipeline 7; the diameter of the floating ball 4 is smaller than the inner diameter of the pre-seawater inlet pipeline 7; the check valve 6 is a check valve.
In this embodiment, the check valve 6 can only flow in one direction, i.e. seawater can only enter the water inlet pipe according to the arrow direction shown in fig. 1, and cannot flow out in the reverse direction.
The check valve 6 is an automatic opening and closing valve which does not require manual or other operation and opens the flow passage by the fluid pressure of the inlet. When the fluid pressure exceeds the opening pressure of the check valve 6, the valve clack is pushed open under the action of the fluid pressure, and the valve is in an open state; when the fluid flows in the reverse direction, the valve flap is pressed against the valve body, and the valve is closed.
The reverse osmosis seawater desalination system is directly driven by utilizing the wave energy, no intermediate energy conversion device is needed, other energy is not needed for driving, the direct utilization of the wave energy can be realized, and the reverse osmosis seawater desalination system is green and efficient; according to the change of sea waves, the stable and efficient operation of the system is realized by controlling the pressure reducing and stabilizing valves and switching the number of the reverse osmosis membrane groups working in parallel, so that the sea water desalination system can adapt to the sea waves of different levels, and the maximum utilization of the sea wave energy is realized.
Example two
The second embodiment of the disclosure introduces a wave-driven parallel adaptive reverse osmosis seawater desalination method, which adopts the wave-driven parallel adaptive reverse osmosis seawater desalination system introduced in the first embodiment.
As shown in fig. 2, the sea wave driven parallel adaptive reverse osmosis seawater desalination method comprises:
pretreating the obtained open sea water to remove impurities and pollutants in the sea water;
the pretreated seawater enters a pretreatment reservoir through a water outlet pipe of the seawater pretreatment device, and the pretreated seawater is controlled by a floating ball and a piston to enter a buffer tank through a seawater inlet pipeline under the action of a check valve;
the number of the pressure reducing and stabilizing valves and the reverse osmosis membrane groups which participate in the work is controlled by judging the size between the seawater pressure in the buffer tank and the working pressure of the reverse osmosis membrane groups, so that the seawater desalination requirements of sea waves of different grades are met.
The floating ball is positioned above the sea surface; the floating ball is connected with the piston and used for pumping and pressurizing seawater in the pretreatment reservoir; the piston is arranged in the seawater inlet pipeline.
The process that the seawater after the control treatment of the floating ball and the piston enters the buffer tank through the seawater inlet pipeline is as follows:
the floating ball moves up and down on the sea surface along with the change of sea waves, when the sea waves fall back, the floating ball drives the piston to move downwards, the pressure is reduced after air in the seawater inlet pipeline is removed, the valve clack in the check valve is pushed open under the action of the seawater pressure of the pretreatment reservoir, the check valve is in a positive flow state, and the seawater in the pretreatment reservoir is sucked into the inlet pipeline;
when the sea waves rise to push the floating ball to drive the piston to move upwards, the sea water in the sea water inlet pipeline is pressurized and sent into the buffer tank, and due to the one-way liquidity of the check valve, the sea water can only enter the buffer tank through the sea water inlet pipeline and cannot flow out of the check valve.
When the sea wave grade is smaller, the pressure of the sea water entering the buffer tank is very small, and whether the pressure of the sea water in the buffer tank is greater than the working pressure P of the reverse osmosis membrane group or not is judged at the moment 1 If it is less than P 1 When the pressure of the buffer tank is not enough to support the reverse osmosis membrane group to work, all pressure reducing and stabilizing valves are closed, and the system is in an energy storage state; the sea water pressure in the buffer tank is increased along with the increase of the sea wave grade, and when the sea water pressure is greater than the working pressure P of the reverse osmosis membrane group 1 And less than twice P 1 When the system works in a single reverse osmosis membrane group mode, a single pressure reducing and stabilizing valve is opened, and a single reverse osmosis membrane group works; when the seawater pressure in the buffer tank is more than 2P 1 During the process, the number of the pressure reducing and stabilizing valves is adjusted according to the seawater pressure in the buffer tank, so that a plurality of (two or more) reverse osmosis membrane groups work simultaneously to adapt to different sea wave grades.
In this embodiment, the working pressure of the reverse osmosis membrane group is a specific value, which is determined by the type of the reverse osmosis membrane; the working pressure of the reverse osmosis membrane mainly influences the water yield and the desalination rate of the reverse osmosis membrane, the water yield can be reduced due to too low working pressure, and the reverse osmosis membrane can be damaged due to too high working pressure;
the opening and closing states of the pressure reducing and stabilizing valve are controlled in an automatic adjusting mode, and the seawater pressure in the buffer tank can be obtained by acquiring readings of a pressure sensor on the buffer tank; judging the relation between the seawater pressure in the buffer tank and the working pressure of the reverse osmosis membrane group through a control program, and controlling the number of pressure reducing and stabilizing valves and the reverse osmosis membrane group which participate in the working, wherein the specific process is detailed in figure 2;
the sea water desalination system can realize stable and efficient operation of the system by controlling the pressure reducing and stabilizing valve and switching the number of the reverse osmosis membrane groups working in parallel according to the change of sea waves, so that the sea water desalination system can adapt to the sea waves of different grades, and the maximum utilization of the sea wave energy is realized.
When the sea wave grade is increased, the movement frequency and amplitude of the floating ball are increased, and the pressure of the seawater entering the buffer tank is increased; when the sea wave grade is reduced, the pressure of the sea water entering the buffer tank is reduced, and the sea wave grade can be judged by detecting the pressure of the sea water in the buffer tank.
In the embodiment, on the basis of the sea wave driven parallel self-adaptive reverse osmosis seawater desalination system introduced in the first embodiment, sea wave energy is directly utilized to drive the reverse osmosis seawater desalination system, an intermediate energy conversion device is not needed, other energy is not needed for driving, the direct utilization of the sea wave energy can be realized, and the sea wave desalination system is green and efficient; according to the change of sea waves, the stable and efficient operation of the system is realized by controlling the pressure reducing and stabilizing valve and switching the number of reverse osmosis membrane groups working in parallel, so that the sea water desalination system can adapt to the sea waves of different levels, and the maximum utilization of the sea wave energy is realized;
when the sea wave grade is smaller, the pressure of the sea water entering the buffer tank is smaller, a pressure reducing and stabilizing valve is opened, and a single reverse osmosis membrane group works; when the sea wave grade is larger, the pressure of the sea water entering the buffer tank is larger, and the number of the pressure reducing and stabilizing valves for working is adjusted according to the pressure of the sea water in the buffer tank, so that a plurality of reverse osmosis membrane groups work simultaneously to adapt to different sea wave grades.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present disclosure, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive changes in the technical solutions of the present disclosure.
Claims (10)
1. A sea wave driven parallel self-adaptive reverse osmosis seawater desalination system is characterized by comprising:
seawater pretreatment equipment;
the pretreatment reservoir is communicated with a water outlet pipe of the seawater pretreatment device and is communicated with the buffer tank through a seawater inlet pipeline; a through hole provided with a check valve is formed on the side surface of the seawater inlet pipeline close to the side of the pretreatment water storage pool; a plurality of buffer tank water outlet pipes are arranged above the buffer tanks, each buffer tank water outlet pipe is communicated with a pressure reducing and stabilizing valve, and each pressure reducing and stabilizing valve is communicated with a reverse osmosis membrane group; each reverse osmosis membrane group is provided with a first water outlet pipe and a second water outlet pipe.
2. An ocean wave driven parallel adaptive reverse osmosis desalination system as defined in claim 1 wherein the inlet pipe of the seawater pretreatment device is in communication with open seawater.
3. An ocean wave driven parallel adaptive reverse osmosis desalination system as defined in claim 1 wherein a piston, a floating ball and a connecting rod connecting the piston and the floating ball are provided inside the seawater intake conduit near the side of the pre-treatment reservoir.
4. A sea wave driven parallel adaptive reverse osmosis desalination system as claimed in claim 3 wherein the diameter of said piston matches the inner diameter of said sea water inlet pipe; the diameter of the floating ball is smaller than the inner diameter of the pre-seawater inlet pipeline.
5. An ocean wave driven parallel adaptive reverse osmosis desalination system as defined in claim 1 wherein the check valve is a one-way valve.
6. A wave-driven parallel adaptive reverse osmosis desalination system as claimed in claim 1 wherein each of said first outlet pipes is in communication with a fresh water collection means and each of said second outlet pipes is in communication with a brine pond; and a brine tank water outlet pipe is arranged at the bottom of the brine tank.
7. An ocean wave driven parallel adaptive reverse osmosis desalination system as defined in claim 1 wherein the bottom of the surge tank is provided with a pressure sensor.
8. An ocean wave driven parallel adaptive reverse osmosis seawater desalination method which adopts an ocean wave driven parallel adaptive reverse osmosis seawater desalination system as defined in any one of claims 1 to 7 and is characterized by comprising the following steps:
pretreating the obtained open sea water;
the pretreated seawater enters a pretreatment reservoir through a water outlet pipe of the seawater pretreatment device, and the pretreated seawater is controlled by a floating ball and a piston to enter a buffer tank through a seawater inlet pipeline under the action of a check valve;
the number of the pressure reducing and stabilizing valves and the reverse osmosis membrane groups which participate in the work is controlled by judging the size between the seawater pressure in the buffer tank and the working pressure of the reverse osmosis membrane groups, so that the seawater desalination requirements of sea waves of different grades are met.
9. A sea wave driven parallel adaptive reverse osmosis seawater desalination method as defined in claim 8, wherein the process of controlling the treated seawater to enter the buffer tank through the seawater inlet pipe by the floating ball and the piston is as follows:
the floating ball moves up and down on the sea surface along with the change of sea waves, when the sea waves fall back, the floating ball drives the piston to move downwards, the pressure is reduced after air in the seawater inlet pipeline is removed, the valve clack in the check valve is pushed open under the action of the seawater pressure of the pretreatment reservoir, the check valve is in a positive flow state, and the seawater in the pretreatment reservoir is sucked into the inlet pipeline;
when the sea wave rises to push the floating ball to drive the piston to move upwards, the sea water in the sea water inlet pipeline is pressurized and sent into the buffer tank, and because of the one-way liquidity of the check valve, the sea water can only enter the buffer tank through the sea water inlet pipeline and cannot flow out of the check valve.
10. A sea wave driven parallel adaptive reverse osmosis seawater desalination method as defined in claim 8, wherein when the sea wave level increases, the frequency and amplitude of the floating ball movement increases, and the pressure of the seawater entering the buffer tank increases; when the sea wave grade is reduced, the pressure of the sea water entering the buffer tank is reduced, and the sea wave grade can be judged by detecting the pressure of the sea water in the buffer tank.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811753A (en) * | 2010-04-20 | 2010-08-25 | 北京泛海波浪发电科技有限责任公司 | Wave energy sea water desalinating device |
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| CN110577259A (en) * | 2019-10-30 | 2019-12-17 | 广船国际有限公司 | Seawater desalination system and seawater desalination ship |
| CN112759009A (en) * | 2020-12-28 | 2021-05-07 | 浙江海洋大学 | Pressure oil direct-drive seawater desalination system based on wave energy conversion |
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| CN101811753A (en) * | 2010-04-20 | 2010-08-25 | 北京泛海波浪发电科技有限责任公司 | Wave energy sea water desalinating device |
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| CN110204009A (en) * | 2019-07-05 | 2019-09-06 | 合肥工业大学 | A kind of wave energy and solar seawater desalination and the device of salt manufacturing |
| CN110577259A (en) * | 2019-10-30 | 2019-12-17 | 广船国际有限公司 | Seawater desalination system and seawater desalination ship |
| CN112759009A (en) * | 2020-12-28 | 2021-05-07 | 浙江海洋大学 | Pressure oil direct-drive seawater desalination system based on wave energy conversion |
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