CN115385418B - Movable sea water desalination device utilizing wave energy - Google Patents
Movable sea water desalination device utilizing wave energy Download PDFInfo
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- CN115385418B CN115385418B CN202211032519.9A CN202211032519A CN115385418B CN 115385418 B CN115385418 B CN 115385418B CN 202211032519 A CN202211032519 A CN 202211032519A CN 115385418 B CN115385418 B CN 115385418B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/06—Energy recovery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
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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
- F03B13/22—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 flow of water resulting from wave movements to drive a motor or turbine
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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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- 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
- 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 movable sea water desalting device utilizing wave energy. The buoyancy swing type wave energy mechanism is connected with the energy recovery mechanism through the hydraulic energy storage power generation mechanism and the reverse osmosis membrane sea water desalination mechanism, wherein two sides of the buoyancy swing plate are provided with protruding nodule structures, the swing plate arm is fixedly connected with the buoyancy swing plate and is installed on the base through the swing plate shaft, the hydraulic cylinder is hinged on the buoyancy swing plate and the base and is connected with the hydraulic motor and the generator through the hydraulic control module, one end of the full-wave rectifying loop is communicated with the hydraulic energy accumulator through the throttle valve, the other end of the full-wave rectifying loop is communicated with the oil tank through the overflow valve, the generator drives the high-speed pump through the double-shaft stretching motor, the high-speed pump is connected with the reverse osmosis membrane group through the sea water pretreatment device, the fresh and concentrated water discharged by the reverse osmosis membrane group enters the desalinated water storage tank and is connected with the energy recovery mechanism through the one-way clutch and the double-shaft stretching motor. The device can buffer wave energy, improve electric energy quality, realize continuous and stable wave energy conversion, enlarge wave capture frequency range, increase power generation time, and has simple structure and low failure rate.
Description
Technical Field
The invention relates to a sea water desalting device in the technical field of water treatment, in particular to a movable sea water desalting device utilizing wave energy.
Background
Ocean wave energy is widely existing in nature as a renewable energy source which is huge and largely undeveloped, and has a rich reserve. Compared with other renewable energy sources, the energy intensity of the ocean wave is very high, and the ocean wave energy extraction is a very promising renewable energy source production solution, and has wide application prospect and important practical significance. However, the motion of waves in the marine environment has the characteristics of randomness and low frequency, which provides challenges for the efficient collection and utilization of wave energy, the current utilization of wave energy is mainly power generation, meanwhile, a plurality of islands in China have the problem of lack of fresh water, and the wave energy conversion device is utilized to convert the kinetic energy and potential energy of the waves to generate power so as to drive the sea water desalination device to prepare fresh water, so that the sea water desalination device not only is the utilization of novel renewable energy sources, but also is an attempt to solve the problem of increasingly severe water consumption in the world.
Desalination of sea water is considered one of the most promising technologies for supplying fresh water in water-deficient areas, because it provides a method for producing high quality water from sea water and has lower energy consumption than other processes such as evaporation processes. The reverse osmosis sea water desalination method is one of the mainstream technologies of the current sea water desalination method, and has the advantages of short construction period, high automation degree, capability of realizing modularized installation, flexible scale selection, low investment and the like. Because the electric energy is mainly used for driving the pump to boost the concentrated seawater, and the high-pressure seawater penetrates through the reverse osmosis membrane group to desalinate the seawater, the cost of the obtained fresh water is high, and particularly, in the case of emergency water use of island residents, how to better utilize renewable energy sources to prepare the fresh water provides a certain guarantee for the emergency situations of water shortage and power failure, so that the method is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to enrich the application scene of the existing sea water desalting device, and designs a movable sea water desalting device utilizing wave energy, which converts the wave energy into electric energy and supplies the electric energy to a high-speed pump to drive a reverse osmosis sea water desalting system.
The technical scheme provided by the invention is as follows:
the movable sea water desalting device comprises a buoyancy swing type wave energy mechanism, a hydraulic energy storage power generation mechanism, a reverse osmosis membrane sea water desalting mechanism and an energy recovery mechanism; the buoyancy swing type wave energy mechanism is driven by wave energy to drive the hydraulic energy storage power generation mechanism to generate electric energy, the electric energy is input into the reverse osmosis membrane sea water desalination mechanism to drive the reverse osmosis membrane sea water desalination mechanism to work, and recovery power generation is realized through the energy recovery mechanism.
The buoyancy swing type wave energy mechanism comprises a buoyancy swing plate, a sine convex nodular structure of the buoyancy swing plate, a swing plate arm, a swing plate shaft, a piston rod, a hydraulic cylinder and a base; the base is arranged below the sea surface, one end of the swing plate arm is fixedly connected with the buoyancy swing plate, the other end of the swing plate arm is hinged on one side of the base through a swing plate shaft, one end of the hydraulic cylinder is hinged on the buoyancy swing plate, and the other end of the hydraulic cylinder is hinged on the other side of the base;
the hydraulic energy storage power generation mechanism comprises a hydraulic control module, a hydraulic motor and a power generator which are all arranged on the base; the two cylinder cavities of the hydraulic cylinder are connected with a hydraulic port of a hydraulic motor through a hydraulic control module, and an output shaft of the hydraulic motor is connected with an input shaft of a generator.
The hydraulic control module comprises a full-wave rectifying loop, an oil tank, an overflow valve, a throttle valve and a hydraulic accumulator; the full-wave rectification loop is mainly formed by connecting four one-way valves, and particularly comprises two groups of one-way valves formed by connecting two one-way valves in the same direction, wherein each group of one-way valves is formed by connecting two one-way valves in the same direction, and the two groups of one-way valves are connected in parallel in the same direction; the two cylinder cavities of the hydraulic cylinder are respectively communicated with two check valves in two groups of check valves of the full-wave rectifying circuit, one end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with the oil tank, the other end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with the hydraulic accumulator through the throttle valve, meanwhile, the other end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with the oil tank through the overflow valve, the inlet of the hydraulic motor is communicated with the hydraulic accumulator, and the outlet of the hydraulic motor is communicated with the oil tank.
The reverse osmosis membrane seawater desalination mechanism comprises a high-speed pump without a gear box, a double-shaft extension motor, a seawater pretreatment device, a reverse osmosis membrane group and a desalted water storage tank; the electric input end of the double-shaft stretching motor is connected with the electric output end of the hydraulic energy storage power generation mechanism, one end of the output shaft of the double-shaft stretching motor is fixedly connected with the input shaft of the high-speed pump in a coaxial way, the inlet of the high-speed pump is communicated with sea water, the outlet of the high-speed pump is connected with the inlet of the reverse osmosis membrane group through the sea water pretreatment device, the reverse osmosis membrane group is provided with two outlets, the two outlets are respectively used for discharging fresh water and high-pressure concentrated water, the outlet for discharging fresh water is communicated with the desalinated water storage tank, and the outlet for discharging high-pressure concentrated water is communicated with the energy recovery mechanism.
The energy recovery mechanism comprises a one-way clutch and a vortex pump; the two hydraulic ports of the vortex pump are respectively connected with an outlet of the reverse osmosis membrane group for discharging high-pressure concentrated water and seawater, and an output shaft of the vortex pump is connected with the other end of the output shaft of the double-shaft extension motor through a one-way clutch.
Compared with the prior art, the invention has the following beneficial effects:
1. the movable sea water desalting device utilizing the wave energy provided by the invention has the advantages that the wave energy is used for pushing the buoyancy swing type wave energy device to be converted into mechanical energy and then into hydraulic energy, the buoyancy swing plate adopts a sine convex nodular structure, the structure has better functions of reducing drag and deferring separation stall compared with the traditional smooth structure, the characteristics of shallow water effect of offshore areas, single wave energy propagation direction and the like can be effectively utilized, the wave energy can be better absorbed, the reciprocating swing of the swing plate is enhanced, and the energy conversion efficiency is further improved. The hydraulic transmission system composed of the hydraulic cylinder, the hydraulic accumulator, the one-way valve group, the throttle valve, the overflow valve and the hydraulic motor can better adapt to the random characteristic of wave energy change, can buffer wave energy, improve electric energy quality and realize continuous and stable wave energy conversion. Under the condition of high waves, the pressure of the energy accumulator is always larger than the opening pressure, and the system can continuously generate electricity; and under the condition of small waves, the generator intermittently generates electricity. The wave capturing frequency range is enlarged, the power generation time is increased, the pressure control can be realized by the device only depending on the system pipeline and elements, the structure is simple, and the failure rate is low. The waves exert a great force at low speeds, and the hydraulic system is very suitable for absorbing energy in this case, and the waves attenuate as they propagate in shallow water, so that there is less likelihood of damage in extreme conditions.
2. The integrated installation of the sea water desalination module on land is convenient for move to the water shortage resident area, and convenient and quick installation and arrangement provide guarantee for emergency water, and the offshore seabed is close, so that the length of pipeline arrangement is shortened, and the transmission loss is reduced. The reverse osmosis membrane separates the seawater into usable desalinated water, the rest of the concentrated seawater is still in a high-pressure state, and a vortex pump is used as an energy recovery device to recover part of residual pressure, so that a motor is driven in an auxiliary manner, and the energy loss is reduced. And the vortex pump has the advantages of simple structure, convenient maintenance and flexible operation arrangement.
Drawings
FIG. 1 is a buoyancy swing plate of the present invention having a raised nodule structure;
FIG. 2 is a buoyancy oscillating wave energy device of the present invention;
FIG. 3 is a hydraulic energy storage power generation device of the present invention;
fig. 4 is a mobile reverse osmosis desalination plant of the present invention.
In the figure, 1 is a sinusoidal convex nodular structure of a buoyancy swing plate; 2 is a buoyancy swinging plate; 3 is a swing plate arm; 4 is a swinging plate shaft; 5 is a piston rod; 6 is a hydraulic cylinder; 7 is a base; 8 is a hydraulic control module; 9 is a hydraulic motor; 10 is a generator; 11 is a one-way valve; 12 is an oil tank; 13 is an overflow valve; 14 is a throttle valve; 15 is a hydraulic accumulator; 16 is a high speed pump without a gearbox; 17 is a double-shaft extension motor; 18 is a one-way clutch; 19 is a vortex pump; 20 is a seawater pretreatment device; 21 is a reverse osmosis membrane group; and 22 is a desalinated water storage tank.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1 to 4, the movable reverse osmosis seawater desalination device utilizing wave energy in one embodiment provided by the invention comprises a buoyancy swing type wave energy mechanism, a hydraulic energy storage power generation mechanism, a reverse osmosis membrane seawater desalination mechanism and an energy recovery mechanism; the buoyancy swing type wave energy mechanism is driven by wave energy to drive the hydraulic energy storage power generation mechanism to generate electric energy, the electric energy is input into the reverse osmosis membrane sea water desalination mechanism to drive the reverse osmosis membrane sea water desalination mechanism to work, and recovery power generation is realized through the energy recovery mechanism.
The buoyancy swing type wave energy device and the hydraulic energy storage power generation device are uniformly distributed on the offshore seabed, and the reverse osmosis sea water desalination device and the energy recovery device are uniformly distributed on the coast land.
As shown in fig. 2, the buoyancy swing type wave energy mechanism comprises a buoyancy swing plate 2, a sine convex nodular structure 1 of the buoyancy swing plate 2, a swing plate arm 3, a swing plate shaft 4, a piston rod 5, a hydraulic cylinder 6 and a base 7; the base 7 is arranged below the sea surface, one end of the swinging plate arm 3 is fixedly connected with the buoyancy swinging plate 2, sine convex nodular structures 1 are arranged on two sides of the buoyancy swinging plate 2, the other end of the swinging plate arm 3 is hinged on one side of the base 7 through the swinging plate shaft 4, one end of the hydraulic cylinder 6 is hinged on the buoyancy swinging plate 2, and the other end of the hydraulic cylinder is hinged on the other side of the base 7; the swinging plate of the buoyancy pendulum is a hollow plate-shaped body, the swinging plate is provided with two swinging plate arms, the main shaft of the swinging plate is arranged on the swinging plate arms, and the piston rod support is arranged on the swinging plate body. The piston rod is connected with the buoyancy pendulum through a shaft, the piston rod can move back and forth in the hydraulic cylinder to fix the base on the offshore seabed, the lower end of the buoyancy pendulum plate 2 is fixedly connected with the base in a hinged manner through a connector, and the connector capable of swinging is combined with the swinging panel.
As shown in fig. 1, the sinusoidal raised nodule structures 1 on both sides of the buoyancy swing plate 2 are sinusoidal waveforms, similar to raised nodules distributed at the front edge of the pectoral fin of a whale, and the novel structure has better drag reduction and stall-delaying effects than the traditional smooth structure. The invention is inspired by the 'nodular effect', the sinusoidal raised nodular structure is applied to the buoyancy swinging plate, and compared with the traditional smooth structure, the structure has better functions of reducing drag and deferring separation stall, can effectively utilize various characteristics of shallow water effect of offshore areas, single wave energy propagation direction and the like, can better absorb wave energy, and enhances the reciprocating swing of the swinging plate so as to improve the energy conversion efficiency.
The buoyancy pendulum is formed by combining a buoyancy pendulum plate 2 and a pendulum plate arm 3, the buoyancy pendulum is hinged on a base 7 through a pendulum plate shaft 4, a hydraulic cylinder 6 is connected on the buoyancy pendulum plate through a piston rod 5, the hydraulic cylinder 6 is connected on a hydraulic cylinder support of the base through the hydraulic cylinder, the base is arranged on the seabed close to the shore, and the installation area belongs to a shallow water propulsion wave area.
The top of the buoyancy pendulum is better below the average sea surface, and the buoyancy pendulum is perpendicular to the sea bottom by virtue of buoyancy when no waves exist. Under the action of external force, the buoyancy pendulum can swing around the pendulum plate shaft 4. When the buoyancy pendulum swings, the piston rod 5 drives the piston to reciprocate in the hydraulic cylinder 6.
The hydraulic energy storage power generation mechanism comprises a hydraulic control module 8, a hydraulic motor 9 and a generator 10 which are all arranged on the base 7; the two cylinder chambers of the hydraulic cylinder 6 are connected with a hydraulic port of a hydraulic motor 9 through a hydraulic control module 8, and an output shaft of the hydraulic motor 9 is connected with an input shaft of a generator 10.
A hydraulic control module 8, a hydraulic motor 9 and a generator 10 are mounted on the base 7. The two ends of the hydraulic cylinder 6 are provided with pipelines which are communicated with a hydraulic control module, and the hydraulic control module is provided with pipelines which are communicated with a hydraulic motor.
As shown in fig. 3, the hydraulic control module 8 includes a full-wave rectification circuit, an oil tank 12, a relief valve 13, a throttle valve 14, and a hydraulic accumulator 15; the full-wave rectifying circuit is mainly formed by connecting four one-way valves 11, and specifically comprises two groups of one-way valve groups formed by combining two one-way valves 11 in one group, wherein each group of one-way valve groups is formed by connecting the two one-way valves 11 in the same direction, and the two groups of one-way valve groups are connected in parallel in the same direction; in specific implementation, two cylinder cavities of the hydraulic cylinder 6 are divided into a rod cavity and a rodless cavity, the two cylinder cavities of the hydraulic cylinder 6 are respectively communicated with two check valves 11 in two groups of check valves of a full-wave rectifying circuit, one end of the full-wave rectifying circuit, which is connected in parallel with the two groups of check valves, is communicated with an oil tank 12, the other end of the full-wave rectifying circuit, which is connected in parallel with the two groups of check valves, is communicated with a hydraulic accumulator 15 through a throttle valve 14, and meanwhile, the other end of the full-wave rectifying circuit, which is connected in parallel with the two groups of check valves, is communicated with the oil tank 12 through an overflow valve 13, an inlet of the hydraulic motor 9 is communicated with the hydraulic accumulator 15, and an outlet of the full-wave rectifying circuit is communicated with the oil tank 12.
In the case of shallow water, the water under the sea surface driven by the forward wave of the shallow water makes a reciprocating motion mainly in the horizontal direction, so that the buoyancy swinging plate makes a reciprocating swing along with the sea wave, and a clutch can be arranged between the hydraulic cylinder and the hydraulic cylinder support to allow the hydraulic cylinder to be detached from the hydraulic cylinder. The buoyancy pendulum under the sea surface swings back and forth along with water, the swinging mechanical energy is converted into rotary mechanical energy through a hydraulic system, the buoyancy pendulum plate swings back and forth to drive a piston to move back and forth in a hydraulic cylinder, hydraulic oil flows back and forth in two cylinder cavities of the hydraulic cylinder, and the four one-way valves 11 form a full-wave rectifying circuit to rectify the hydraulic oil flowing back and forth into oil flowing in a single direction.
The rectified oil drives the hydraulic motor 9 to rotate through the throttle valve 14, and the hydraulic motor 9 drives the generator 10 to generate electricity. The throttle valve 14 is controlled to regulate the rotation speed of the hydraulic motor 9, and the hydraulic accumulator 15 filters the fluctuating oil pressure to be gentle like a capacitor in a circuit, so that the hydraulic motor uniformly rotates. The hydraulic motor has a variable capacity to drive the generator at a speed approaching a constant speed with a variable flow.
If the output oil pressure of the wave hydraulic cylinder is too high, the surplus oil is drained back to the oil tank 12 through the relief valve 13. After a period of operation, if the pressure of the hydraulic accumulator 15 no longer satisfies the condition for opening the directional valve, the power generation is stopped. Thus, under rough sea conditions, the pressure of the hydraulic accumulator 15 is always greater than the opening pressure, so that continuous power generation can be realized; and under the condition of small waves, the generator intermittently generates electricity. The use of the hydraulic control module 8 expands the wave capture frequency range. Furthermore, the hydraulic accumulator 15 provides a smaller boost pressure for the low pressure accumulator to reduce the risk of low pressure side cavitation, the hydraulic accumulator 15 smoothing the flow in case of variable capacity motor drive.
The oil tank, the one-way valve, the overflow valve, the throttle valve and the hydraulic accumulator are all arranged in the hydraulic control module 8, and the hydraulic motor and the generator are arranged on the base.
The hydraulic accumulator is an energy storage device in a hydraulic transmission system. The system converts the energy in the system into compression energy or potential energy to store at proper time, and converts the compression energy or potential energy into hydraulic energy to release when the system is needed, and the system is replenished. When the instantaneous pressure of the system increases, the system can absorb the energy of the part so as to ensure that the pressure of the whole system is normal.
A hydraulic motor is an actuator of a hydraulic system that converts hydraulic pressure energy provided by a hydraulic pump into mechanical energy (torque and rotational speed) of its output shaft. Liquid is the medium that transmits forces and movements. The high-pressure oil stored in the high-pressure oil tank is supplied to a hydraulic motor, and the hydraulic motor converts the energy in the high-pressure oil into mechanical energy and further drives a generator to provide electric energy to drive a high-speed pump to pump seawater and supply the seawater to the reverse osmosis seawater desalination device under pressure.
As shown in fig. 4, the reverse osmosis membrane seawater desalination mechanism comprises a high-speed pump 16 without a gear box, a double-shaft extension motor 17, a seawater pretreatment device 20, a reverse osmosis membrane group 21 and a desalinated water storage tank 22;
the electric input end of the double-shaft stretching motor 17 is connected with the electric output end of the generator 10 of the hydraulic energy storage power generation mechanism, one end of the output shaft of the double-shaft stretching motor 17 is fixedly connected with the input shaft of the high-speed pump 16 in a coaxial way, the inlet of the high-speed pump 16 is communicated with sea water, the outlet of the high-speed pump 16 is connected with the inlet of the reverse osmosis membrane group 21 through the sea water pretreatment device 20, the reverse osmosis membrane group 21 is provided with two outlets which are respectively used for discharging fresh water and high-pressure concentrated water, the outlet for discharging fresh water is communicated with the desalinated water storage tank 22, and the outlet for discharging high-pressure concentrated water is communicated with the energy recovery mechanism;
the energy recovery mechanism comprises a one-way clutch 18 and a vortex pump 19; the vortex pump 19 works reversely, two hydraulic ports of the vortex pump 19 are respectively connected with an outlet of the reverse osmosis membrane group 21 for discharging high-pressure concentrated water and seawater, and an output shaft of the vortex pump 19 is connected with the other end of the output shaft of the double-shaft extension motor 17 through the one-way clutch 18.
In the reverse osmosis membrane seawater desalination device, a high-speed pump pumps seawater into a seawater desalination system through a water intake pipe and reaches a certain high pressure, so that the pressure of pretreated raw water can reach the required working pressure of a reverse osmosis membrane group. The filtering reaction device has the functions of preprocessing raw seawater, removing mud sand particles, suspended matters, colloid, algae, microorganisms and other impurities in the seawater through preprocessing the raw seawater adopted by reverse osmosis seawater desalination, and ensuring the safe and stable operation of the desalination device because the quality of the preprocessed seawater meets the requirement of the inflow water quality of a reverse osmosis membrane. The desalinated water obtained by the desalination treatment of the seawater by the reverse osmosis membrane group is stored in a water storage tank for use.
The energy recovery device uses the reverse rotation of the vortex pump as a turbine to recover energy. The concentrated seawater treated by the reverse osmosis membrane group is still high-pressure concentrated seawater, and has residual pressure, the high-pressure concentrated seawater is conveyed to the inlet of the vortex pump through a pipeline, and fluid impacts the blades when flowing through the impeller to push the impeller to rotate, and the rotating shaft outputs mechanical work. The vortex pump is used as an auxiliary prime motor and is connected in series with a motor used as a main prime motor to jointly drive the high-speed pump, wherein the motor adopts a double-shaft extension motor, and a one-way clutch is arranged between the motor and the vortex pump, so that the driven high-speed pump can normally operate before the maintenance of the vortex pump used as the turbine or the fluid pipeline of the vortex pump turbine is connected. Secondly, if the flow to the scroll pump may vary significantly or frequently, the hydraulic turbine will cease to output power and damp the main drive when the flow drops to about 40% of rated flow.
Further, the high-speed pump 16 without a gear box is connected with the double-shaft-extension motor 17 through a coupling, the motor drives the high-speed pump to send seawater into the reverse osmosis seawater desalination system through a water inlet pipe, and firstly enters the seawater pretreatment device 20 for pretreatment, comprising: flocculation, sterilization, precipitation, filtration and the like, and removes turbidity, various types of organic compounds, chromaticity and bacteria in water, thereby relieving the problems of membrane blockage and membrane pollution, reducing the frequency of membrane cleaning and ensuring continuous water supply to a reverse osmosis membrane group. The pretreated raw water can meet the water inlet requirement of the reverse osmosis membrane group 21, reach the turbidity less than or equal to 1NTU and the pollution index SDI 15 And less than or equal to 5, the reverse osmosis membrane is used for desalting and separating raw water into desalted water and concentrated water, and the desalted water is conveyed into a desalted water storage tank 22 and is stored for use.
Further, the concentrated water produced after separation also has a pressure of about 5MPa, and the high-pressure concentrated water is transported to the hydraulic turbine energy recovery device through a pipeline: the vortex pump 19, the dense water enters the vortex pump to make the vortex pump reverse rotation to do turbine operation, the dense water impacts the blade when flowing through the impeller, the impeller is pushed to rotate, and the rotating shaft outputs mechanical work. The vortex pump 19 is used as a turbine energy recovery and is used as an auxiliary prime motor and is connected with the double-shaft extension motor 17 used as a main prime motor in series to jointly drive the high-speed pump, and a one-way clutch 18 is arranged between the motor and the vortex pump, so that the driven high-speed pump can normally operate before the maintenance of the vortex pump as a turbine or the fluid pipeline of the vortex pump turbine is connected. Secondly, if the flow to the scroll pump may vary significantly or frequently, the hydraulic turbine will cease to output power and damp the main drive when the flow drops to about 40% of rated flow. And part of energy is recovered through the energy recovery device, so that the energy utilization rate is increased, and the purpose of energy conservation is achieved.
In the movable sea water desalting device utilizing wave energy, the buoyancy swing type wave energy device drives the hydraulic motor to rotate through the hydraulic transmission system to drive the generator to generate power and supply the power to the double-shaft stretching motor, and the energy recovery device recovers part of energy of concentrated water to assist in driving the double-shaft stretching motor. An energy recovery device: the vortex pump is used as an auxiliary prime motor and the double-shaft extending motor to jointly drive a high-speed pump without a gear box in series, so that the utilization of renewable energy wave energy and the recovery of concentrated water residual pressure are realized, the cost for preparing fresh water is effectively reduced, and more guarantees are provided for the emergency water use situation of residents.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (3)
1. A movable sea water desalination device utilizing wave energy is characterized in that:
the device comprises a buoyancy swing type wave energy mechanism, a hydraulic energy storage power generation mechanism, a reverse osmosis membrane seawater desalination mechanism and an energy recovery mechanism; the buoyancy swing type wave energy mechanism is driven by wave energy to drive the hydraulic energy storage power generation mechanism to generate electric energy, the electric energy is input into the reverse osmosis membrane seawater desalination mechanism to drive the reverse osmosis membrane seawater desalination mechanism to work, and recovery power generation is realized through the energy recovery mechanism;
the buoyancy swing type wave energy mechanism comprises a buoyancy swing plate (2), a sine convex nodular structure (1) of the buoyancy swing plate (2), a swing plate arm (3), a swing plate shaft (4), a piston rod (5), a hydraulic cylinder (6) and a base (7); the base (7) is arranged below the sea surface, one end of the swinging plate arm (3) is fixedly connected with the buoyancy swinging plate (2), sine convex nodular structures (1) are arranged on two sides of the buoyancy swinging plate (2), the other end of the swinging plate arm (3) is hinged to one side of the base (7) through a swinging plate shaft (4), one end of the hydraulic cylinder (6) is hinged to the buoyancy swinging plate (2), and the other end of the hydraulic cylinder is hinged to the other side of the base (7);
the hydraulic energy storage power generation mechanism comprises a hydraulic control module (8), a hydraulic motor (9) and a power generator (10) which are all arranged on the base (7); two cylinder cavities of the hydraulic cylinder (6) are connected with a hydraulic port of a hydraulic motor (9) through a hydraulic control module (8), and an output shaft of the hydraulic motor (9) is connected with an input shaft of a generator (10);
the reverse osmosis membrane seawater desalination mechanism comprises a high-speed pump (16) without a gear box, a double-shaft extension motor (17), a seawater pretreatment device (20), a reverse osmosis membrane group (21) and a desalted water storage tank (22); the electric input end of the double-shaft stretching motor (17) is connected with the electric output end of the hydraulic energy storage power generation mechanism, one end of the output shaft of the double-shaft stretching motor (17) is fixedly connected with the input shaft of the high-speed pump (16) in a coaxial mode, the inlet of the high-speed pump (16) is communicated with sea water, the outlet of the high-speed pump (16) is connected with the inlet of the reverse osmosis membrane group (21) through the sea water pretreatment device (20), the reverse osmosis membrane group (21) is provided with two outlets, the two outlets are respectively used for discharging fresh water and high-pressure concentrated water, the outlet for discharging fresh water is communicated with the desalinated water storage tank (22), and the outlet for discharging high-pressure concentrated water is communicated with the energy recovery mechanism.
2. A mobile sea water desalination device utilizing wave energy as defined in claim 1 wherein: the hydraulic control module (8) comprises a full-wave rectifying circuit, an oil tank (12), an overflow valve (13), a throttle valve (14) and a hydraulic accumulator (15); the full-wave rectification loop is mainly formed by connecting four one-way valves (11), and specifically comprises two groups of one-way valves formed by connecting two one-way valves (11) in the same direction, wherein each group of one-way valves is formed by connecting two one-way valves (11) in the same direction, and the two groups of one-way valves are connected in parallel in the same direction; two cylinder cavities of the hydraulic cylinder (6) are respectively communicated with two check valves (11) in two groups of check valves of a full-wave rectifying circuit, one end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with an oil tank (12), the other end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with a hydraulic accumulator (15) through a throttle valve (14), and meanwhile, the other end of the full-wave rectifying circuit, which is connected with the two groups of check valves in parallel, is communicated with the oil tank (12) through an overflow valve (13), an inlet of the hydraulic motor (9) is communicated with the hydraulic accumulator (15), and an outlet of the full-wave rectifying circuit is communicated with the oil tank (12).
3. A mobile sea water desalination plant utilizing wave energy as defined in claim 2, wherein: the energy recovery mechanism comprises a one-way clutch (18) and a vortex pump (19); the two hydraulic ports of the vortex pump (19) are respectively connected with an outlet of the reverse osmosis membrane group (21) for discharging high-pressure concentrated water and seawater, and an output shaft of the vortex pump (19) is connected with the other end of the output shaft of the double-shaft extension motor (17) through a one-way clutch (18).
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| CN202211032519.9A CN115385418B (en) | 2022-08-26 | 2022-08-26 | Movable sea water desalination device utilizing wave energy |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496146A1 (en) * | 1991-01-25 | 1992-07-29 | Eberle Energy Enterprises, Inc. | Tidal and wave-power collection apparatus for installation in large bodies of water |
| CN103603765A (en) * | 2013-11-28 | 2014-02-26 | 集美大学 | Offshore-type wave energy sea water desalination and power generation combined device |
| CN205820944U (en) * | 2016-07-11 | 2016-12-21 | 武汉理工大学 | A kind of novel sea water desalinization system utilizing wave energy |
| CN106630224A (en) * | 2016-12-05 | 2017-05-10 | 三峡大学 | Tidal-current-energy seawater desalting system |
-
2022
- 2022-08-26 CN CN202211032519.9A patent/CN115385418B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0496146A1 (en) * | 1991-01-25 | 1992-07-29 | Eberle Energy Enterprises, Inc. | Tidal and wave-power collection apparatus for installation in large bodies of water |
| CN103603765A (en) * | 2013-11-28 | 2014-02-26 | 集美大学 | Offshore-type wave energy sea water desalination and power generation combined device |
| CN205820944U (en) * | 2016-07-11 | 2016-12-21 | 武汉理工大学 | A kind of novel sea water desalinization system utilizing wave energy |
| CN106630224A (en) * | 2016-12-05 | 2017-05-10 | 三峡大学 | Tidal-current-energy seawater desalting system |
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