CN107246352B - Seawater wave energy desalination system - Google Patents
Seawater wave energy desalination system Download PDFInfo
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- CN107246352B CN107246352B CN201710466762.4A CN201710466762A CN107246352B CN 107246352 B CN107246352 B CN 107246352B CN 201710466762 A CN201710466762 A CN 201710466762A CN 107246352 B CN107246352 B CN 107246352B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/20—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/62—Application for desalination
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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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- 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
- Y02A20/138—Water desalination using renewable energy
- Y02A20/144—Wave energy
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Abstract
The invention discloses a seawater wave energy desalination system, which comprises two orthogonal float groups, a crank link structure, seawater desalination, compressed air energy storage and a water vapor storage unit, wherein the crank link structure is arranged on the two orthogonal float groups; the two orthogonal float groups capture wave energy in all directions according to wave directions, the electromagnetic clutch, the conical gear and the traction gear are cooperatively coupled with the two float groups to capture energy, the rotary motion of the traction gear is converted into the up-and-down motion of the desalination piston and the compression piston through the crank link rod structure, the air pressure of the expansion cavity and the compression cavity is regulated by the central floating ball through the electromagnetic valve, the fluctuation power of the wave energy is stabilized, and the constant pressure conversion of sea water desalination is ensured. The strong brine waste pressure energy is downwards moved by a compression piston and is converted into high-pressure gas internal energy; the water-air storage unit stores fresh water and compressed air, regulates and controls the pressure of the central floating ball, and improves the compression energy storage efficiency; the invention greatly improves the wave energy conversion efficiency, the reverse osmosis membrane desalination efficiency and the service life, and can certainly promote the actual practicability of wave energy sea water desalination.
Description
Technical Field
The invention discloses a seawater wave energy desalination system, which is applied to wide sea, electric energy and fresh water deficiency areas and realizes reverse osmosis membrane type desalination of seawater by utilizing the cooperation of ocean wave energy and compressed air.
Background
Along with the gradual development of world energy crisis and offshore resources, the development of ocean fish and deep sea petroleum resources is increasingly focused by various countries, and the development and utilization of ocean resources in China are accelerated by 'one-way-by-one' and 'national ocean economic planning development schema'. However, the problems of lack of fresh water on the sea, difficulty in power supply and the like greatly restrict the development and utilization of ocean resources, and the sea water wave energy is used as an emerging clean energy source, has large content capacity and is naturally coupled with sea water desalination, so that the sea water wave energy has become an important research direction of scientific researchers in various countries of the world.
At present, a reverse osmosis membrane desalination process is mainly adopted for sea water desalination, and a water lifting pump is driven by electric energy to finish constant water supply pressure of a desalination membrane so as to improve sea water desalination efficiency and service life of the reverse osmosis membrane, but sea water desalination is a high energy consumption industry, and the traditional electric power supply is necessary to exacerbate environmental pollution and energy crisis. Meanwhile, the sea water desalination efficiency and the service life of the reverse osmosis membrane are closely related to desalination pressure, but the intermittence and the fluctuation of wave energy are extremely easy to cause the change of the membrane desalination pressure, the service life of the membrane is seriously influenced, and energy storage is an effective method for effectively solving the problem of fluctuation power stabilization, but the common storage modes such as storage batteries, hydraulic pressure and the like are extremely easy to cause environmental pollution. Compressed air energy storage is a novel energy storage mode which is strictly pollution-free, and how to couple with wave energy and sea water desalination energy is a key problem which must be solved to improve the wave energy utilization rate and the sea water desalination efficiency.
Disclosure of Invention
The technical task of the invention is to provide a novel seawater wave energy desalination system aiming at the defects in the technology.
The technical scheme adopted for solving the technical problems is as follows: the seawater wave energy desalting system comprises two orthogonal float groups, a crank link structure, a seawater desalting unit, a compressed air energy storage unit and a water vapor storage unit. The two orthogonal float groups capture wave energy in all directions according to wave directions, and drive the desalination piston to move up and down through the crank link structure, so that the problems of sea water suction, sea water desalination, fresh water and high-pressure concentrated brine discharge are completed, the wave energy fluctuation and intermittence are stabilized by compressed air energy storage, the constant-pressure high-efficiency conversion of sea water desalination is ensured, and the desalination efficiency and the service life of the reverse osmosis membrane are improved.
The two orthogonal floater groups are two groups of capturing devices I and II which are arranged in an orthogonal mode, and each capturing device comprises two cylindrical floaters, a floater link rod, a pitching center shaft, a pitching gear, a bevel gear I, a horizontal coupling and a direction adjusting structure. Under the combined action of the buoyancy force and the agitating force of sea waves, the cylindrical floater captures wave energy through up-and-down motion, drives the floater connecting rod to do pitching motion, and is cooperatively converted into horizontal coupling rotary motion through a pitching center shaft, a pitching gear and a conical gear I, and the horizontal coupling rotary motion is mechanically coupled with a crank connecting rod structure through a direction adjusting structure to drive the desalting piston to move so as to complete sea water desalting. The direction-adjusting structure comprises a conical gear II embedded with an electromagnetic clutch II and a traction gear embedded with an electromagnetic clutch I, wherein the conical gear II is coupled with a horizontal coupling of a capturing device I through the electromagnetic clutch II to transfer energy captured by the capturing device I to the traction gear; the electromagnetic clutch I is embedded in the traction gear and is coaxially coupled with the horizontal coupling of the capturing device II, the capturing energy of the capturing device II is transmitted to the traction gear, the external teeth of the traction gear are of a conical structure and are mechanically coupled with the conical gear II, and the number of the capturing devices coupled to the traction gear is changed according to the wave direction; the upper end of the crank link structure is rigidly connected with the traction gear, and the lower part of the crank link structure is rigidly connected with the desalting piston through a constraint bearing, so that the conversion from the rotary motion of the traction gear to the up-and-down motion of the desalting piston is completed.
The sea water desalination comprises a desalination piston, a fresh water cavity and a desalination cavity, wherein the desalination piston is a cylinder piston embedded with a reverse osmosis membrane, and is driven by a crank link rod to separate fresh water and strong brine, and a plurality of hollow cylinder desalination channels are longitudinally arranged to send the fresh water into the fresh water cavity; the fresh water cavity comprises a desalination piston and a fresh water cavity inner wall, and is used for storing fresh water generated by downward movement of the desalination piston; the upper end of the fresh water cavity is provided with a fresh water discharge valve, and the desalted fresh water is sent into a fresh water storage chamber for storage in the process of upward movement of the desalted piston. The desalination cavity is a main place for sea water desalination and is composed of a desalination piston, a desalination cavity inner wall, a sea water inlet channel and a desalination cavity bottom plate, wherein the desalination piston is under the combined action of a crank link rod and compressed air energy storage to finish sea water suction, sea water desalination and fresh water discharge; the seawater inlet channel is of a circular ring type columnar structure, a circular ring type columnar atmospheric inlet and outlet channel is embedded in the seawater inlet channel, a seawater inlet valve I is arranged at the upper end of the seawater inlet channel, a seawater inlet valve II is arranged at the lower end of the seawater inlet channel, and the flow of seawater entering the desalination cavity is controlled; the bottom plate of the desalination cavity is a disc type fixed end plate sleeved outside the air inlet and outlet channel and is used for supporting the quality of the desalinated seawater and the desalination pressure of the reverse osmosis membrane; the bottom plate of the desalination cavity is provided with a disc type end cover which is controlled by an electromagnet embedded on the end plate and used for switching on and off a circular type strong brine discharge channel I.
The compressed air energy storage comprises an atmosphere inlet and outlet channel, a compression piston, a compression cavity, an expansion cavity and a central floating ball. The atmosphere inlet and outlet channel is of a circular ring type columnar structure, is arranged at the outer sides of the two piston link rod movement channels, the upper end of the atmosphere inlet and outlet channel is connected with the atmosphere, and the lower end of the atmosphere inlet and outlet channel is connected with the compression cavity through the atmosphere inlet and outlet valve I to control the flow of the sucked gas; the compression piston is a flat cylindrical piston resistant to salt corrosion, is rigidly connected with the desalination piston, is embedded with a concentrated brine discharge channel II, and is provided with a concentrated brine discharge valve I for controlling the discharge flow of the concentrated brine, wherein the upper side of the compression piston is provided with an expansion chamber, the lower side of the compression piston is provided with a compression chamber, the gas pressure of the expansion chamber and the compression chamber is regulated and controlled, and the desalination pressure of a reverse osmosis membrane is ensured to be constant; the compression cavity is formed by a compression piston, the inner wall of the compression cavity and a bottom plate of the compression cavity, the compression piston moves downwards to convert redundant wave energy into gas internal energy, the air pressure is gradually increased until the air pressure exceeds the air pressure of the central floating ball, the one-way valve I is opened, and compressed air is stored in the central floating ball; the expansion cavity is formed by a desalination cavity bottom plate, a compression piston, an inner wall of the expansion cavity and the outer side of an air inlet and outlet channel, compressed gas in the center floating ball enters the expansion cavity to do work through an electromagnetic flow valve II, the desalination piston is assisted to move downwards, the constant desalination pressure of a reverse osmosis membrane is ensured, the sea water desalination is finished, high-pressure strong brine enters the expansion cavity through the desalination cavity bottom plate, the compression piston is assisted to move downwards, and further compressed air is stored; the central floating ball is used for storing compressed air, and simultaneously provides buoyancy support for the sea water desalination equipment, so that the stability of the horizontal reference of the wave energy capturing device is ensured.
The water-gas storage unit comprises a pressurized gas storage chamber, a fresh water storage chamber and a photovoltaic cell. The compressed air storage chamber is fixed below the fresh water storage chamber, stores compressed air, provides buoyancy support for the fresh water storage chamber, is connected with the central floating ball through the compressed air channel, and is provided with a vortex machine for bidirectional air flow for regulating and controlling the air pressure of the central floating ball, so that the energy storage efficiency of compressed air is effectively improved. The fresh water storage chamber is positioned at the upper side of the compressed air storage chamber, is supported by buoyancy provided by the compressed air storage chamber, is connected with the fresh water cavity through the fresh water channel and the fresh water discharge valve, and is provided with a one-way valve II; the upper side of the fresh water storage room is provided with a direct current water pump which is responsible for extracting fresh water for users such as ocean going ships. The photovoltaic cell is arranged at the upper end of the fresh water storage chamber, and a lithium iron phosphate storage battery is arranged in the photovoltaic cell to provide power supply support for an electromagnetic valve, an electromagnet, an electromagnetic clutch, a direct current water pump and a vortex machine of the seawater wave energy desalination system.
The beneficial effects brought by the invention are as follows:
1) The reverse osmosis membrane type sea water desalination and wave energy capture integrated design is realized, sea water suction and fresh water discharge are integrated, a self-suction mechanism based on sea water potential energy is introduced, the use of a water lifting pump which is an important energy consumption device for traditional sea water desalination is omitted, and the sea water desalination power consumption is greatly reduced.
2) The porous desalination piston with the reverse osmosis membrane is arranged in the device, and the automatic separation of strong brine and fresh water is realized by downward movement, so that the sea water desalination link is greatly simplified; in particular to a discharge mechanism of strong brine waste water, the strong brine waste water can promote air compression, a novel high-pressure strong brine energy recovery way is provided, and the sea water desalination efficiency and the wave energy utilization efficiency are greatly improved.
3) The desalination piston and the compression piston are integrally designed, the gas pressure in the expansion cavity and the compression cavity is dynamically regulated, the influence of the fluctuation and the intermittence of wave energy on the membrane desalination performance is effectively stabilized, the sea water desalination efficiency is greatly improved, and the service life of the reverse osmosis membrane is greatly prolonged.
4) The invention has the advantages of compact structure, portability, easy maintenance, strong sea wave impact resistance, high sea water desalination efficiency, stable fresh water supply and the like, and can greatly promote the practicability of the sea water wave energy desalination system.
Drawings
FIG. 1 is a block diagram of a seawater wave energy desalination system.
Figure 2 is a top view of two orthogonal sets of floats.
FIG. 3 is a cross-sectional view of two orthogonal sets of floats and a crank link configuration.
Fig. 4 shows a diagram of the desalination piston.
Figure 5 shows a cross-sectional view of a chamber floor.
Figure 6 is a cross-sectional view of a seawater intake passage and an atmospheric intake passage.
FIG. 7 is a flow chart of various mode selections for the desalination system.
The reference numerals in the figures illustrate: 1. the system comprises a seawater inlet valve I, a seawater inlet valve II, a solenoid valve 3, a concentrated brine outlet valve 4, a concentrated brine outlet valve I, a concentrated brine outlet valve 5, a fresh water storage chamber 6, a direct current water pump 27, a disc type end cover 28, a one-way valve I, a one-way valve 8, an electromagnetic flow valve I, a gas inlet valve 9, a gas inlet valve II, a one-way valve 10, a gas outlet valve 11, a water reducing piston 12, a fresh water cavity 14, a desalination chamber 15, an expansion chamber 16, a compression chamber 17, a crank link structure 18, a photovoltaic cell 19, a protective cover 20, a fresh water outlet valve 21, a cylinder float 22, a center float 23, a fixed ground anchor 24, a pressure storage chamber 25, a fresh water storage chamber 26, a direct current water pump 27, a disc type end cover 28, a one-way valve II, a vortex machine 29, a float link 31, a pitch center shaft 32, a pitch gear 33, a conical gear II, a conical gear 35, a horizontal coupling 36, a fresh water channel 37, a traction gear 38, a constraint bearing 39, a electromagnetic clutch II, a gas inlet channel 40, a gas inlet channel 45, a compression chamber 48, a pressure chamber 48, a base plate 48, a concentrated brine channel 46, a pressure channel 48, a brine inlet channel 48, a pressure channel 48 and a concentrated brine channel. A-A 'is a section of a bottom plate of the desalting cavity, and B-B' is a section of a sea water inlet channel and an atmosphere inlet and outlet channel.
Description of variables: high wave height of H wave, H min The height of the start wave, P w. Wave energy capture power, P d Desalination of power, P e Expansion power, P c Compression power.
Note that: h < H min The sea wave has little energy and no capturing value.
Detailed Description
The invention is further illustrated by the following figures and examples.
The seawater wave energy desalination system disclosed by the invention (shown in fig. 1) comprises two orthogonal float groups (comprising a cylindrical float 21, a float link 30, a pitching center shaft 31, a pitching gear 32, a conical gear I33, a horizontal coupling 35, a conical gear II 34, an electromagnetic clutch I39, an electromagnetic clutch II 40 and a traction gear 37), a crank link structure 17, seawater desalination (a desalination piston 11, a fresh water cavity 13, a desalination cavity 14, a seawater inlet valve I1, a seawater inlet valve II 2, a seawater inlet channel 44, a desalination channel 41, a reverse osmosis membrane 42, a fresh water outlet valve 20, an electromagnet 3, a disc-type end cover 27 and a strong brine outlet channel I45), compressed air energy storage (a compression piston 12, a compression cavity 16, an expansion cavity 15, a central float 22, an atmospheric inlet and outlet valve I7, an atmospheric inlet and outlet valve II 9, an atmospheric inlet and outlet channel 43, a one-way valve I10, an electromagnetic flow valve I8 and an electromagnetic flow valve II 6), a water storage unit (a pressure storage chamber 24, a vortex 29, a compressed air channel 49, a fresh water storage chamber 25, a one-way valve II 28, a fresh water channel 36, a direct-current suction pump 26 and a photovoltaic cell 18).
Under the combined action of the buoyancy force and the agitating force of sea waves, the cylindrical floats 21 in the two orthogonal float groups move up and down to capture wave energy, drive the float link rod 30 to pitch, and convert the pitching motion into the rotation motion of the horizontal coupling 35 through the pitching center shaft 31, the pitching gear 32 and the conical gear I33; the rotational movement of the horizontal coupling 35 is converted into rotational movement of the traction gear 37 via the bevel gear ii 34, the electromagnetic clutch i 39 and the electromagnetic clutch ii 40. The upper end of the crank link structure 17 is rigidly connected with the traction gear 37, and the lower part is rigidly connected with the desalination piston 11 through the constraint bearing 38, so that the rotary motion of the traction gear 37 is converted into the up-and-down motion of the desalination piston 11, and the sea water desalination is driven.
The seawater desalination is performed by the up-and-down motion of the desalination piston 11, thereby completing the suction of seawater, the desalination of seawater and the discharge of fresh water. External seawater enters the desalination cavity 14 through the seawater inlet valve I1, the seawater inlet valve II 2 and the seawater inlet channel 44, and the booster desalination piston 11 moves upwards; the seawater in the desalination cavity 14 is desalinated into fresh water through the desalination channel 41 and the reverse osmosis membrane 42 under the effect of desalination pressure, enters the fresh water cavity 13, moves upwards along with the desalination piston 11, and is discharged through the fresh water discharge valve 20; the strong brine in the desalination chamber 14 is discharged into the expansion chamber 15 through the strong brine discharge channel I45 under the action of the disc-type end cover 27 which is opened by the electromagnet 3, the boosting compression piston 12 moves downwards until the compression piston 12 moves downwards to the compression chamber bottom plate 48, and the strong brine in the expansion chamber 15 is discharged to the sea through the strong brine discharge valve I4, the strong brine discharge channel II 47 and the strong brine discharge valve II 5.
The compressed air energy storage is realized by the up-and-down motion of the compression piston 12, so that the compression energy storage and expansion boosting are completed, the wave fluctuation power of waves is stabilized, and the constant-pressure desalination of sea water is ensured. The external atmosphere enters the compression cavity 16 through the atmosphere inlet and outlet valve I7 and the atmosphere inlet and outlet channel 43, moves downwards along with the compression piston 12, stores redundant wave energy in the form of compressed air, and opens the one-way valve I10 along with the pressure rise of the compressed air, so that high-pressure air is stored in the center floating ball 22; the high-pressure gas in the center floating ball 22 enters the compression cavity 16 and the expansion cavity 15 through the electromagnetic flow valve I8 and the electromagnetic flow valve II 6 respectively, the compressed gas expands to release energy, the pressure in the desalination cavity 14 is regulated and controlled, and the expansion boosting compression piston 12 and the desalination piston 11 move to ensure constant air pressure in the desalination cavity 14.
The water-gas storage unit is used for storing fresh water and compressed air, and the compressed air provides buoyancy support for the fresh water. The compressed air storage chamber 24 is communicated with the central floating ball 22 through a vortex machine 29 and a compressed air channel 49, and the vortex machine 29 is used for regulating and controlling the air pressure in the central floating ball 22 so as to ensure that compression energy storage and expansion energy release do not have under compression and expansion loss; the fresh water storage chamber 25 collects fresh water in a collecting way through a one-way valve II 28 and a fresh water channel 36, and supplies external demands through a direct-current water pump 26; the lithium iron phosphate storage battery is arranged in the photovoltaic cell 18 and provides power supply support for an electromagnetic valve, an electromagnet, an electromagnetic clutch, a direct current water pump and a vortex machine of the seawater wave energy desalination system.
The intermittent and fluctuating wave is easy to cause the fluctuation of sea water desalination pressure, the sea water desalination efficiency and the service life of the membrane are seriously influenced, the energy storage state of compressed air is regulated and controlled, the influence of fluctuation power on sea water desalination pressure is stabilized, the system has four working modes of wave sea water desalination, wave compression sea water desalination, wave expansion sea water desalination and water pressure expansion sea water desalination, as shown in figure 7, the working mode judgment is based on the wave working condition, the central floating ball air pressure and P obtained by real-time calculation w 、P c 、P e P d Performed by a method of manufacturing the same.
When P w ＝P d When the system is operated in an independent wave sea water desalination mode;
when P w >P d Regulating and controlling compression power P c The surplus power of wave energy is stored in the form of compressed air, so that P w -P c ＝P d The system operates in a wave compressed sea water desalination mode;
when P w <P d Regulating and controlling the expansion power P e Let P w +P e ＝P d The wave energy balance power is supplemented by high-pressure gas expansion, and the system operates in wave expansion sea water desalination;
when H is<h min When the sea water desalination device is used, the wave energy is small, the energy required by sea water desalination is completely provided by compressed air energy storage, and the system operates in the water pressure expansion sea water desalination.
1. Independent wave sea water desalination
When the sea condition is good, the wave energy captured by the system basically meets the sea water desalination requirement, and the cylindrical floater 21 is lifted upwards to mainly suck sea water, suck the atmosphere and discharge fresh water; the sea water desalination, the utilization of the waste pressure of the strong brine and the discharge are mainly carried out when the person is down.
The cylindrical floater 21 is upward leaned under the action of waves, and the wave mechanical energy, the water potential energy and the atmospheric kinetic energy jointly drive the desalination piston 11 and the compression piston 12 to move upwards. Under the action of water potential energy, seawater enters the desalination chamber 14 through the seawater inlet valve I1 and the seawater inlet valve II 2, external atmosphere enters the compression chamber 16 through the atmosphere inlet and outlet valve I7, fresh water in the fresh water chamber 14 moves upwards along with the desalination piston 11 and is gradually discharged through the fresh water discharge valve 20, and when the desalination piston 11 moves upwards to the top of the fresh water chamber 13, the seawater inlet valve I1, the seawater inlet valve II 2 and the fresh water discharge valve 20 are closed. The cylinder float 21 is raised to the upper limit and the raising is finished.
The cylindrical floater 21 is downward pushed down under the action of waves, and the wave mechanical energy drives the desalting piston 11 and the compressing piston 12 to move downwards so as to desalt sea water. The seawater is sent into the fresh water cavity 13 through the embedded desalination channel 41 of the desalination piston 11 and the reverse osmosis membrane 42, the seawater desalination is completed along with the gradual downward movement of the desalination piston 12 to the desalination lower limit position, the electromagnet 3 is started at this moment, the disc type end cover 27 moves upwards, the high-pressure strong brine remained in the desalination cavity 13 automatically enters the expansion cavity 15 through the strong brine discharge channel I45, the seawater desalination is completed at this moment, the system enters the strong brine waste pressure utilization stage, the atmosphere inlet valve I7 and the atmosphere inlet valve II 9 are closed, the compression piston 12 starts to compress the gas under the combined action of wave mechanical energy and strong brine waste pressure, the high-pressure gas enters the center floating ball 22 for storage along with the rising of the pressure of the compressed gas, the compression piston 12 moves downwards to the bottom of the compression cavity 16, the strong brine is discharged through the strong brine discharge valve I4, the strong brine discharge channel II 47 and the strong brine discharge valve II 5 under the self waste pressure until the strong brine is completely discharged, the strong brine discharge valve I4 and the strong brine discharge valve II 5 are closed, and the cylinder 21 is closed to the lower limit position, and the lower limit position is finished.
2. Wave compressed sea water desalination
When the waves are large, the system captures more energy than is needed for desalination of sea water, and the excess energy is stored in the form of compressed air in the center float 22. The cylinder float 21 is upward turned to mainly suck seawater and atmosphere and discharge fresh water; the downward depression is mainly used for sea water desalination, strong brine waste pressure utilization, strong brine discharge and compressed air energy storage.
The cylindrical floater 21 is upward leaned under the action of waves, and the wave mechanical energy, the water potential energy and the atmospheric kinetic energy jointly drive the desalination piston 11 and the compression piston 12 to move upwards. Under the action of water potential energy, seawater enters the desalination cavity 14 through the seawater inlet valve I1 and the seawater inlet valve II 2, external atmosphere enters the compression cavity 16 through the atmosphere inlet and outlet valve I7, fresh water in the fresh water cavity 13 moves upwards along with the desalination piston 11 and is gradually discharged through the fresh water discharge valve 20, and when the desalination piston 11 moves upwards to the top of the fresh water cavity 13, the seawater inlet valve I1, the seawater inlet valve II 2, the atmosphere inlet and outlet valve I7, the atmosphere inlet valve II 9 and the fresh water discharge valve 20 are closed, and the cylinder floater 21 is lifted upwards to the upper limit and is lifted upwards to finish.
The cylindrical floater 21 is downward pushed down under the action of waves, the wave mechanical energy drives the desalination piston 11 and the compression piston 12 to move downwards, the redundant wave energy is stored in the form of compressed air, and the redundant power is absorbed to ensure the constant desalination pressure. Sea water is fed into the fresh water cavity 13 through a desalination channel 41 and a reverse osmosis membrane 42 which are embedded in the desalination piston 11; with the desalination piston 12 gradually moving downwards to the desalination lower limit position, the sea water desalination is completed, at this moment, the electromagnet 3 is started, the disc type end cover 27 moves upwards, the high-pressure strong brine remained in the desalination cavity 14 automatically enters the expansion cavity 15 through the strong brine discharge channel I45, the compression piston 12 compresses gas under the combined action of wave mechanical energy and the waste pressure energy of the strong brine, the gas pressure is gradually increased, the gas pressure is stored to the central floating ball 22 through the one-way valve I10, the compression piston 12 finally moves downwards to the bottom of the compression cavity 16, the strong brine is discharged through the strong brine discharge valve I4, the strong brine discharge channel II 47 and the strong brine discharge valve II 5 under the action of self waste pressure, and when the cylindrical floater 21 is depressed downwards to the lower limit, the depression is completed.
3. Wave expansion sea water desalination
When the waves are small, the wave energy captured by the system is lower than the energy required by sea water desalination, the insufficient energy is supplemented by high-pressure gas in the central floating ball 22 and expansion assistance. The cylinder float 21 is lifted up mainly for sucking sea water and air, discharging fresh water and discharging expansion gas, and is lifted down mainly for sea water desalination, expansion assistance, utilization of strong brine waste pressure and discharging.
The cylindrical floater 21 is upward leaned under the action of waves, and the wave mechanical energy, the water potential energy and the kinetic energy of the air enter the cylindrical floater to jointly drive the desalination piston 11 and the compression piston 12 to move upwards. Under the action of water potential energy, seawater enters the desalination cavity 14 through the seawater inlet valve I1 and the seawater inlet valve II 2, external atmosphere enters the compression cavity 16 through the atmospheric inlet valve I7, fresh water in the fresh water cavity 13 moves upwards along with the desalination piston 11 and is gradually discharged through the fresh water discharge valve 20, meanwhile compressed gas in the expansion cavity 15 is also discharged through the atmospheric inlet valve II 9 under the pushing of the compression piston 12, and when the desalination piston 11 moves upwards to the top of the fresh water cavity 13, the seawater inlet valve I1, the seawater inlet valve II 2 and the fresh water discharge valve 20 are closed, and the cylinder floater 21 is upwards lifted to the upper limit and upwards lifted to finish.
The cylindrical floater 21 is downward pushed down under the action of waves, and the wave mechanical energy and the gas expansion energy jointly drive the desalting piston 11 and the compressing piston 12 to move downwards so as to desalt sea water. The seawater is fed into the fresh water cavity 13 through the desalination channel 41 and the reverse osmosis membrane 42 embedded in the desalination piston 11, meanwhile, gas in the central floating ball 22 enters the expansion cavity 15 through the electromagnetic flow valve II 6, the expansion boosting piston moves downwards, the gas in the compression cavity is discharged automatically through the atmosphere inlet valve I7 and the atmosphere inlet valve II 9, the desalination piston 12 moves downwards to a desalination lower limit position gradually, the seawater desalination is completed, at the moment, the seawater enters a concentrated brine waste pressure utilization stage, at the moment, the atmosphere inlet valve I7 and the atmosphere inlet valve II 9 are closed, the electromagnet 3 is opened, the disc-type end cover 27 moves upwards, the high-pressure concentrated brine remained in the desalination cavity 13 automatically enters the expansion cavity 15 through the concentrated brine discharge channel I45, the compression piston 12 is stored in the central floating ball 22 under the combined action of wave mechanical energy and the waste pressure of the concentrated brine through the single-phase valve I10 until the compression piston 12 moves downwards to the bottom of the compression cavity 16, and the concentrated brine is discharged through the concentrated brine discharge valve I4, the concentrated brine discharge channel II 47 and the concentrated brine valve II 5 under the action of the waste pressure. The cylindrical float 21 is depressed to the lower limit, and the depression ends.
4. Hydraulic expansion sea water desalination
When the wave is extremely small and the wave energy has no capturing value, the energy required for the upward movement of the piston 11 is provided by the water potential energy, the atmospheric kinetic energy and the gas expansion energy together, and the energy required for the downward depression is provided by the gas expansion energy entirely. The piston moves upwards to suck in sea water, discharge fresh water, expansion boosting and discharge of expansion gas, and moves downwards to desalt sea water, expansion boosting and use and discharge of strong brine waste pressure.
In the process of upward movement of the desalination piston, the water potential energy, the atmospheric entry kinetic energy and the expansion energy of the compressed gas drive the desalination piston 11 and the compression piston 12 to move upward together. Under the action of water potential energy, seawater enters the desalination cavity 14 through the seawater inlet valve I1 and the seawater inlet valve II 2, compressed gas enters the compression cavity 16 through the electromagnetic flow valve I8 in the center floating ball 22, the expansion work boosting compression piston 12 and the desalination piston 11 move upwards, fresh water in the fresh water cavity 13 moves upwards along with the desalination piston 11 and is discharged through the fresh water discharge valve 20, and gas in the expansion cavity 15 is discharged through the atmospheric inlet valve II 9 under the pushing of the compression piston 12 until the desalination piston 11 moves upwards to the top of the fresh water cavity 13, the seawater inlet valve I1, the seawater inlet valve II 2, the electromagnetic flow valve I8 and the fresh water discharge valve 20 are closed, the desalination piston 11 moves upwards to the upper limit, and the upwards movement is finished.
In the process of the downward movement of the desalination piston, the gas expansion can drive the desalination piston 11 and the compression piston 12 to move downward so as to desalinate the sea water. The gas in the center floating ball 22 enters the expansion cavity 15 through the electromagnetic flow valve II 6 to push the compression piston 12 to move downwards to drive the desalination piston 11 to move downwards, the seawater is compressed under the pressure of the desalination piston 11 through the desalination channel 41 and the reverse osmosis membrane 42 embedded in the desalination piston 11, the gas in the compression cavity 16 is freely discharged through the atmosphere inlet valve I7 and the atmosphere inlet valve II 9, the desalination piston 11 gradually moves downwards to the desalination lower limit position, the seawater desalination is completed, the seawater enters the strong brine waste pressure utilization stage at the moment, the atmosphere inlet valve I7 and the atmosphere inlet valve II 9 are closed, the electromagnet 3 is started at the moment, the disc type end cover 27 moves upwards, the high-pressure strong brine remained in the desalination cavity 13 automatically enters the expansion cavity 15 through the strong brine discharge channel I45, the gas in the compression cavity 16 is compressed under the waste pressure of the strong brine, the high-pressure gas enters the center floating ball 22 through the one-way valve I10 until the compression piston 12 moves downwards to the bottom of the compression cavity 16, the strong brine is discharged through the waste brine discharge valve I4, the strong brine discharge channel II and the strong brine discharge valve II 5 under the self pressure, and the desalination is completed.
Claims (1)
1. The seawater wave energy desalination system applied to wide sea is characterized by comprising two orthogonal float groups, a crank link structure, a seawater desalination unit, a compressed air energy storage unit and a water vapor storage unit; the two orthogonal float groups capture wave energy in an omnibearing way according to the wave direction, drive the desalination piston to move up and down through a crank link structure, carry out sea water suction, sea water desalination, fresh water discharge, strong brine waste pressure utilization and discharge under the cooperation of the electromagnetic valve, regulate and control the air pressure in the compression cavity and the expansion cavity in real time, stabilize wave energy fluctuation power, ensure the constant pressure high-efficiency conversion of sea water desalination, and promote the desalination efficiency and the service life of the reverse osmosis membrane;
the two orthogonal floater groups are two groups of orthogonally arranged capturing devices I and II, and each capturing device comprises two cylindrical floaters, a floater link rod, a pitching center shaft, a pitching gear, a conical gear I, a horizontal coupling and a direction-adjusting structure; the cylindrical floater is a wave energy capturing unit, the vertical motion captures wave energy under the action of the buoyancy force and the agitating force of sea waves, the floater connecting rod is rigidly connected with the cylindrical floater, the cylindrical floater performs pitching motion under the action of the cylindrical floater, the cylindrical floater is converted into rotary motion of a horizontal coupling through the action of a pitching center shaft, a pitching gear and a conical gear I, and the direction-adjusting structure is coupled with a crank connecting rod structure through an electromagnetic clutch to drive a desalination piston to move up and down so as to desalinate and separate sea water; the direction-adjusting structure comprises a conical gear II and a traction gear, wherein an electromagnetic clutch II embedded in the conical gear II is horizontally coupled with a capturing device I, and captures energy captured by the capturing device I and transmits the energy to the traction gear; the traction gear is internally embedded with an electromagnetic clutch I and is coaxially coupled with a horizontal coupling of a capturing device II, the capturing energy of the capturing device II is transmitted to the traction gear, the external teeth of the traction gear are of a conical structure, and the traction gear is mechanically coupled with the conical gear II; the electromagnetic clutch changes the number of capturing devices coupled with the traction gear according to the wave direction; the upper end of the crank link structure is rigidly connected with the traction gear, the lower part of the crank link structure is rigidly connected with the desalination piston through a constraint bearing, and the conversion from the rotary motion of the traction gear to the up-and-down motion of the desalination piston is completed, so that energy support is provided for sea water desalination;
the seawater desalination device comprises a desalination piston, a fresh water cavity and a desalination cavity, wherein the desalination piston is a cylinder piston embedded with a reverse osmosis membrane, fresh water and concentrated brine are separated under the pushing of a crank link rod, and a plurality of hollow cylinder desalination channels are longitudinally arranged to send the fresh water into the fresh water cavity; the fresh water cavity comprises a desalination piston and a fresh water cavity inner wall, and is used for storing fresh water generated by downward movement of the desalination piston, the upper end of the fresh water cavity is provided with a fresh water discharge valve, and the desalted fresh water is sent into a fresh water storage chamber for storage in the upward movement process of the desalination piston; the desalination cavity is a sea water desalination place and consists of a desalination piston, a desalination cavity inner wall, a sea water inlet channel and a desalination cavity bottom plate, wherein the desalination piston is used for completing sea water suction, sea water desalination and fresh water discharge under the combined action of a crank link rod and compressed air energy storage, the sea water inlet channel is of a circular ring type columnar structure, a circular ring type columnar atmosphere inlet and outlet channel is embedded, a sea water inlet valve I is arranged at the upper end of the sea water inlet channel, a sea water inlet valve II is arranged at the lower end of the sea water inlet channel, and the flow of sea water entering the desalination cavity is controlled; the bottom plate of the desalination cavity is a disc type fixed end plate sleeved outside an atmospheric inlet and outlet channel and used for supporting the weight of the desalinated seawater and the desalinated pressure of the reverse osmosis membrane, the bottom plate of the desalination cavity is provided with a disc type end cover, and the bottom plate is controlled by an electromagnet embedded in the end plate to open a strong brine discharge channel I and discharge high-pressure strong brine to the expansion cavity;
the compressed air energy storage comprises an atmosphere inlet and outlet channel, a compression piston, a compression cavity, an expansion cavity and a central floating ball; the atmosphere inlet and outlet channel is of a circular ring type columnar structure, is arranged at the outer side of the piston link rod movement channel, the upper end of the atmosphere inlet and outlet channel is connected with the atmosphere, and the lower end of the atmosphere inlet and outlet channel is connected with the compression cavity through the atmosphere inlet and outlet valve I to control the flow of the sucked gas; the compression piston is a flat cylindrical piston with salt corrosion resistance, is rigidly connected with the desalination piston, is embedded with a concentrated brine discharge channel II, controls the discharge of the concentrated brine by a concentrated brine discharge valve I, and has an expansion cavity at the upper side and a compression cavity at the lower side, and controls the gas pressure of the expansion cavity and the compression cavity and the desalination pressure of the reverse osmosis membrane to be constant; the compression cavity is formed by a compression piston, the inner wall of the compression cavity and a bottom plate of the compression cavity, the compression piston moves downwards to convert redundant wave energy into gas internal energy, the air pressure is increased until the air pressure exceeds the air pressure of the central floating ball, the one-way valve I is opened, and compressed air is stored in the central floating ball; the expansion cavity is formed by a desalination cavity bottom plate, a compression piston, an inner wall of the expansion cavity and the outer side of an air inlet and outlet channel, compressed gas in the center floating ball enters the expansion cavity to do work through an electromagnetic flow valve II, the desalination piston is assisted to move downwards, the constant desalination pressure of a reverse osmosis membrane is ensured, the sea water desalination is finished, high-pressure strong brine enters the expansion cavity through the desalination cavity bottom plate, the compression piston is assisted to move downwards, and further compressed air is stored; the central floating ball is used for storing compressed air, and providing buoyancy support for the sea water desalination equipment, so that the stability of the horizontal reference of the wave energy capturing device is ensured;
the water-gas storage unit comprises a pressurized gas storage chamber, a fresh water storage chamber and a photovoltaic cell; the compressed air storage chamber is fixed at the lower side of the fresh water storage chamber and is used for storing compressed air, providing buoyancy support for the fresh water storage chamber, being connected with the central floating ball through a compressed air channel, and the upper side of the compressed air channel is provided with a vortex machine for two-way air flow and used for regulating and controlling the air pressure of the central floating ball, so that the energy storage efficiency of compressed air is effectively improved; the fresh water storage chamber is positioned on the upper side of the compressed air storage chamber, is supported by buoyancy provided by the compressed air storage chamber, is connected with the fresh water cavity through the fresh water channel and the fresh water discharge valve, and is provided with a one-way valve II; a direct-current water pump is arranged on the upper side of the fresh water storage room and is responsible for extracting fresh water for ocean-going ship users; the photovoltaic cell is arranged at the upper end of the fresh water storage chamber, and a lithium iron phosphate storage battery is arranged in the photovoltaic cell to provide power supply support for an electromagnetic valve, an electromagnet, an electromagnetic clutch, a direct current water pump and a vortex machine in the sea water desalination system;
the seawater wave energy desalination system has four working modes of wave seawater desalination, wave compression seawater desalination, wave expansion seawater desalination and hydraulic expansion seawater desalination:
(1) Independent wave sea water desalination
When wave energy captures powerP w =desalination powerP d When the system operates in an independent wave sea water desalination mode, the system captures wave energy to meet sea water desalination requirements; the cylinder floater is lifted up under the action of waves, the wave mechanical energy, the water potential energy and the atmospheric kinetic energy drive the desalination piston and the compression piston to move up together, the seawater enters the desalination cavity through the seawater inlet valve I and the seawater inlet valve II under the action of the water potential energy, the external atmosphere enters the compression cavity through the atmospheric inlet valve I, the fresh water in the fresh water cavity moves up along with the desalination piston and is gradually discharged through the fresh water discharge valve, and when the desalination piston moves up to the top of the fresh water cavity, the seawater inlet valve I, the seawater inlet valve II and the fresh water discharge valve are closed, the cylinder floater is lifted up to the upper limit, and the lifting up is finished; the cylindrical floater descends under the action of waves, the wave mechanical energy drives the desalination piston and the compression piston to move downwards to desalinate sea water, the sea water is fed into the fresh water cavity through the desalination channel and the reverse osmosis membrane embedded in the desalination piston, the sea water desalination is completed as the desalination piston moves downwards gradually to the desalination lower limit position, at the moment, the electromagnet is started, the disc-type end cover moves upwards, high-pressure strong brine remained in the desalination cavity automatically enters the expansion cavity through the strong brine discharge channel I, at the moment, the sea water desalination is completed, the system enters the strong brine waste pressure utilization stage, and the atmosphere inlet and outlet valve I and the atmosphere are openedThe compression piston starts to compress gas under the combined action of wave mechanical energy and strong brine waste pressure energy, the pressure of the compressed gas rises, the high-pressure gas enters the center floating ball through the one-way valve I to be stored, the compression piston moves down to the bottom of the compression cavity, strong brine is discharged through the strong brine discharge valve I, the strong brine discharge channel II and the strong brine discharge valve II under the action of self waste pressure until the strong brine is completely discharged, the strong brine discharge valve I and the strong brine discharge valve II are closed, and the cylindrical floating ball is downward pushed down to the lower limit and is downward pushed down to finish;
(2) Wave compressed sea water desalination
When (when)P w >P d Regulating compression powerP c The surplus power of wave energy is stored in the form of compressed air, so thatP w -P c = P d The system operates in a wave compressed sea water desalination mode; the cylinder floater is lifted up under the action of waves, the wave mechanical energy, the water potential energy and the atmospheric kinetic energy drive the desalination piston and the compression piston to move up together, the seawater enters the desalination cavity through the seawater inlet valve I and the seawater inlet valve II under the action of the water potential energy, the external atmosphere enters the compression cavity through the atmospheric inlet valve I, the fresh water in the fresh water cavity moves up along with the desalination piston and is gradually discharged through the fresh water discharge valve, and when the desalination piston moves up to the top of the fresh water cavity, the seawater inlet valve I, the seawater inlet valve II, the atmospheric inlet valve I, the atmospheric inlet valve II and the fresh water discharge valve are closed, and the cylinder floater is lifted up to the upper limit and lifted up is ended; the cylindrical floater descends under the action of waves, the wave mechanical energy drives the desalination piston and the compression piston to move downwards, redundant wave energy is stored in a compressed air mode, redundant power is absorbed to ensure constant desalination pressure, and seawater is fed into the fresh water cavity through a desalination channel and a reverse osmosis membrane which are embedded in the desalination piston; along with the gradual downward movement of the desalination piston to the desalination lower limit position, the seawater desalination is completed, at the moment, the electromagnet is started, the disc-type end cover moves upwards, high-pressure strong brine remained in the desalination cavity automatically enters the expansion cavity through the strong brine discharge channel I, the compression piston compresses gas under the combined action of wave mechanical energy and the waste pressure energy of the strong brine, the gas pressure is gradually increased, and the gas pressure is stored to the center through the one-way valve IThe floating ball, the compression piston finally moves down to the bottom of the compression cavity, the strong brine is discharged through the strong brine discharge valve I, the strong brine discharge channel II and the strong brine discharge valve II under the action of self waste pressure, and when the cylindrical floating ball is downward pushed down to the lower limit, the downward pushing is finished;
(3) Wave expansion sea water desalination
When (when)P w <P d Regulating and controlling expansion powerP e Make the followingP w +P e =P d The wave energy balance power is supplemented by high-pressure gas expansion, and the system operates in wave expansion sea water desalination; the cylinder floater is lifted up under the action of waves, the wave mechanical energy, the water potential energy and the kinetic energy of the entering air drive the desalination piston and the compression piston to move up together, the sea water enters the desalination cavity through the sea water inlet valve I and the sea water inlet valve II under the action of the water potential energy, the external air enters the compression cavity through the atmosphere inlet valve I, the fresh water in the fresh water cavity moves up along with the desalination piston and is gradually discharged through the fresh water discharge valve, meanwhile, the compressed air in the expansion cavity is also discharged through the atmosphere inlet valve II under the pushing of the compression piston, and when the desalination piston moves to the top of the fresh water cavity, the sea water inlet valve I, the sea water inlet valve II and the fresh water discharge valve are closed, the cylinder floater is lifted up to the upper limit, and the lifting up is finished; the cylindrical floater descends under the action of waves, the wave mechanical energy and the gas expansion energy jointly drive the desalination piston and the compression piston to move downwards for sea water desalination, sea water is fed into the fresh water cavity through the desalination channel and the reverse osmosis membrane which are embedded in the desalination piston, meanwhile, gas in the central floater enters the expansion cavity through the electromagnetic flow valve II, the expansion boosting piston moves downwards, the gas in the compression cavity is not blocked and is automatically discharged through the atmosphere inlet valve I and the atmosphere inlet valve II, the desalination piston moves downwards to the desalination lower limit position gradually, the sea water desalination is completed, at the moment, the sea water enters the waste pressure utilization stage of the strong brine, at the moment, the atmosphere inlet valve I and the atmosphere inlet valve II are closed, the electromagnet is opened, the disc type end cover moves upwards, the high-pressure strong brine remained in the desalination cavity automatically enters the expansion cavity through the strong brine discharge channel I, the compression piston is compressed gas pressure is increased under the combined action of the wave mechanical energy and the waste pressure of the strong brine, and the waste pressure of the single-phase valve I enters the central floater for storageUntil the compression piston moves downwards to the bottom of the compression cavity, the strong brine is discharged through the strong brine discharge valve I, the strong brine discharge channel II and the strong brine discharge valve II under the action of self waste pressure, and the cylindrical floater is downwards pushed down to the lower limit, and the downwards pushing is finished;
(4) Hydraulic expansion sea water desalination
When the wave height of sea waveH<Height of the start waveh min When the wave energy is small, the energy required by sea water desalination is completely provided by compressed air energy storage, and the system operates in the water pressure expansion sea water desalination; the method comprises the steps that in the upward moving process of a desalination piston, water potential energy, atmospheric kinetic energy and compressed gas expansion energy jointly drive the desalination piston and the compression piston to move upwards, sea water enters a desalination cavity through a sea water inlet valve I and a sea water inlet valve II under the action of the water potential energy, compressed gas in a central float enters the compression cavity through an electromagnetic flow valve I, expansion work assists the compression piston and the desalination piston to move upwards, fresh water in a fresh water cavity moves upwards along with the desalination piston and is discharged through a fresh water discharge valve, gas in the expansion cavity is pushed by the compression piston and is discharged through an atmospheric inlet valve II until the desalination piston moves to the top of the fresh water cavity, the sea water inlet valve I, the sea water inlet valve II, the electromagnetic flow valve I and the fresh water discharge valve are closed, the desalination piston moves upwards to an upper limit, and the upward movement is finished; the method comprises the steps that in the process of downward movement of a desalination piston, gas expansion can drive the desalination piston and a compression piston to move downwards to desalinate sea water, gas in a central floating ball enters an expansion cavity through an electromagnetic flow valve II to push the compression piston to move downwards, the desalination piston is driven to move downwards, sea water is fed into a fresh water cavity through a desalination channel and a reverse osmosis membrane which are embedded in the desalination piston under the pressure of the desalination piston, the gas in the compression cavity is not discharged freely through an atmosphere inlet valve I and an atmosphere inlet valve II, the desalination piston is gradually moved downwards to a desalination lower limit position, sea water desalination is completed, at the moment, a concentrated brine waste pressure utilization stage is entered, the atmosphere inlet valve I and the atmosphere inlet valve II are closed, an electromagnet is opened, a disc type end cover is moved upwards, high-pressure concentrated brine remained in the desalination cavity automatically enters the expansion cavity through a concentrated brine discharge channel I, the gas in the compression cavity is compressed under the action of waste pressure energy of the concentrated brine, the high-pressure gas enters the central floating ball through a one-way valve I until the compression piston moves downwardsAnd the bottom of the compression cavity is discharged through a strong brine discharge valve I, a strong brine discharge channel II and a strong brine discharge valve II under the action of self waste pressure, and the desalting piston moves downwards to the lower limit and then ends.
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| CN110608126B (en) * | 2019-09-24 | 2020-11-10 | 六安永贞匠道机电科技有限公司 | Method for generating electricity by utilizing waves |
| CN111807473B (en) * | 2020-08-31 | 2020-12-22 | 山东招金膜天股份有限公司 | Low-pressure membrane method seawater desalination device |
| CN116354457B (en) * | 2023-03-10 | 2024-03-08 | 武汉理工大学 | Sea water desalination assembly and sea water desalination system |
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