CN216273532U - Electromagnetic coupling sea water desalination device - Google Patents
Electromagnetic coupling sea water desalination device Download PDFInfo
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- CN216273532U CN216273532U CN202120735736.9U CN202120735736U CN216273532U CN 216273532 U CN216273532 U CN 216273532U CN 202120735736 U CN202120735736 U CN 202120735736U CN 216273532 U CN216273532 U CN 216273532U
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Abstract
An electromagnetic coupling seawater desalination device. The electromagnetic coupling seawater desalination device mainly comprises a power supply, a fixed electrode, a fluid electrode, an ion exchange membrane and a magnet. The anode of the fixed electrode is connected with the anode of a power supply, the cathode of the fixed electrode is connected with the cathode of the power supply, the fluid electrode is arranged in a fluid electrode runner, the fluid electrode runner is arranged between the fixed electrode and an ion exchange membrane, the anode side of the electrode is an anode runner, the cathode side of the electrode is a cathode runner, a seawater desalination runner is formed between the ion exchange membranes, parallel electric fields vertical to the desalination runner in the horizontal direction are generated between the electrodes, and the magnets are arranged at the upper part and the lower part of the device to generate magnetic fields vertical to the desalination runner in the vertical direction. The seawater desalination device realizes desalination and desalination of seawater in a mode of coupling electric field force and magnetic field force, and compared with the traditional CDI desalination technology, the seawater desalination device is higher in desalination efficiency and better in effect.
Description
Technical Field
The utility model relates to a seawater desalination device, in particular to an electromagnetic coupling seawater desalination device.
Background
At present, the fresh water resource of China is about 28000 million tons, which accounts for 6 percent of the total water resource of the world and is located in the fourth world, but the total population of China is over 14 hundred million, which accounts for 19 percent of the total population of the world, the per-capita fresh water accounts for less than 2300t, and less than 25 percent of the total water of the world, which is one of the countries with the most scarce per-capita water resource of the world. Although the fresh water resources in China are seriously deficient, the sea area in China is wide, the coastline is long and narrow, the seawater resources are rich, the seawater resources are reasonably utilized and processed into the fresh water resources, the problem of shortage of the fresh water resources can be effectively solved, and the method is an effective measure for promoting the sustainable development of coastal areas.
The development of the seawater desalination technology is one of the important approaches for solving the shortage of fresh water resources, and since the last 60 th century, a plurality of ocean-related scientific and technological enterprises and college research institutes in China develop series of research and practice of seawater desalination. At present, the seawater desalination methods mainly comprise a distillation method, a membrane separation method, a crystallization method, a renewable energy source combination method, an oil separation desalination method and the like. The most common seawater desalination techniques at present are mainly distillation and membrane separation.
The distillation method realizes seawater desalination and desalination by heating and condensing seawater. Mainly comprises a low-temperature multi-effect distillation technology (LT-MED), a multi-stage flash evaporation technology (MSF), a vapor compression distillation (VC) and the like. The distillation method has high energy consumption, high project investment and large equipment volume, and is easy to cause thermal pollution to the surrounding marine environment.
The membrane separation method mainly utilizes the selective permeability of a separation membrane, sets potential difference or pressure difference on two sides of the membrane to realize seawater desalination and desalination, and comprises a reverse osmosis technology (SWRO), an electrodialysis technology (ED) and the like according to different selection and separation processes of the separation membrane. The membrane separation method has higher requirements on the pretreatment of seawater, the loss of a membrane component is higher, salts with small dissociation degree, undissociated substances, bacteria and the like are difficult to remove, and the water quality of a product is poor.
Other modes such as a crystallization method, an oil separation method and the like also have the technical problems of high construction cost, large equipment floor area, complex process, high energy consumption, high water production cost, low fresh water separation efficiency, low fresh water effluent quality, easy secondary pollution and the like.
On the other hand, capacitive desalination and desalination (CDI) is considered to be the most energy-saving desalination technology, and CN101481159B discloses a low-energy-consumption seawater desalination device and method capable of recovering energy, which can be used for desalination of seawater or brackish water or purification of ion-containing wastewater and metal recovery by adopting activated carbon double-electric-layer adsorption. Compared with the traditional distillation or membrane technology, the energy-saving effect of the CDI technology has certain advantages, but because the water itself has an electrolytic reaction, the electrode voltage must be controlled in a lower range, the formed electric field intensity is low, the electric field force applied to anions and cations in the seawater is small, in order to achieve a good desalting effect, the CDI equipment is usually large in size, and the treatment capacity cannot meet the actual requirement easily. CN105253991B discloses an electromagnetic field coupling desalination device with a pollution reduction function and a method thereof, which utilize the action of an electric field generated by a fixed electrode and a magnetic field generated by a strong magnet to realize seawater desalination, and the method applies additional magnetic field force to anions and cations in seawater to improve desalination efficiency, but the current CDI technology still cannot solve the problems of difficult electrode regeneration, complex replacement and low production efficiency, and is difficult to realize continuous automatic production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and providing the electromagnetic coupling seawater desalination device with high yield and high quality of fresh water effluent.
The technical scheme adopted by the utility model for solving the technical problems is as follows: an electromagnetic coupling seawater desalination device comprises a body, wherein the body mainly comprises a power supply, a fixed electrode, a fluid electrode, an ion exchange membrane, a magnet and an electrode regeneration mechanism. The fixed electrode anode is connected with the positive electrode of a power supply, the fixed electrode cathode is connected with the negative electrode of the power supply, the fluid electrode is arranged in a fluid electrode runner, the fluid electrode runner is arranged between the fixed electrode and an ion exchange membrane, the anode side of the electrode is an anode runner, the cathode side of the electrode is a cathode runner, a seawater desalination runner is formed between the ion exchange membranes, parallel electric fields vertical to the desalination runner in the horizontal direction are generated between the electrodes, the magnets are arranged at the upper part and the lower part of the body to generate magnetic fields vertical to the desalination runner in the vertical direction, and the electrode regeneration mechanism is used for fluid electrode regeneration.
The seawater desalination device comprises a seawater pump, a seawater pretreatment device, an electrode neutralization chamber and a delivery pump, wherein a water outlet of the seawater pump is connected with a water inlet of the seawater pretreatment device, a water outlet of the seawater pretreatment device is communicated with a seawater desalination flow channel, a fluid electrode is delivered to the electrode neutralization chamber through the delivery pump, the electrode neutralization chamber is connected with a discharge port of the fluid electrode flow channel and used for discharging of the fluid electrode, and a feed port of an electrode regeneration mechanism is connected with a discharge port of the electrode neutralization chamber.
Further, the fluid electrode is slurry prepared by grinding porous materials and is used for adsorbing ions in seawater, and preferably activated carbon slurry.
Further, the fixed electrode is a conductive material, preferably a graphite electrode.
Further, the power supply provides stable direct current for the system, can be a solar power supply, a wind power supply, a tidal power supply, a geothermal power supply, a storage battery and the like, and the power supply voltage is set to be 1-1.8V, preferably 1-1.5V.
Further, an anion exchange membrane is arranged on the outer side of the anode of the fixed electrode, and anions in seawater can be selectively passed through the anion exchange membrane, so that the anions are enriched in the anode flow channel. And a cation exchange membrane is arranged on the outer side of the cathode of the fixed electrode, and cations in seawater can be selectively passed through the cation exchange membrane, so that the cations are enriched in the cathode flow channel. The distance between the anion exchange membrane and the cation exchange membrane is 1-10 cm, preferably 2-5 cm.
Further, the flow channel of the fluid electrode can be a single straight flow channel, a multiple straight flow channel, an S-shaped flow channel, etc., and in order to make the effective length of the flow channel longer and the contact area of the fluid electrode larger, the S-shaped flow channel is preferred.
Further, the magnet can be a permanent magnet plate, a U-shaped magnet, an electric permanent magnet and the like, and is used for generating a magnetic field at the desalination flow channel.
Further, the electrode neutralization chamber is a horizontal storage tank or a vertical storage tank with a stirring function, and after fluid electrodes with different charges enter the electrode neutralization chamber, the fluid electrodes are fully mixed under the action of a stirring mechanism, so that the uniformity of the slurry is maintained, and the discharging process is completed.
Further, the electrode regeneration mechanism regenerates the fluid electrode in an electrodialysis mode.
Furthermore, a brine extracting and salting device can be arranged and is connected with a brine chamber water outlet of the electrode regeneration mechanism.
The seawater desalination device realizes desalination and desalination of seawater in a mode of coupling electric field force and magnetic field force, and compared with the traditional CDI desalination technology, the seawater desalination device is higher in desalination efficiency and better in effect.
The utility model collects the anions and cations in seawater by the fluid electrode, can realize the efficient charge and discharge and regeneration of the electrode, and the fluid electrode completes the regeneration cycle in the system without frequently replacing and cleaning the electrode, thereby being easier to realize the automatic and continuous production of seawater desalination and electrode regeneration. The desalting flow channel, the parallel electric field and the parallel magnetic field are mutually vertical to each other in a manner that the horizontal direction is vertical to the parallel electric field of the desalting flow channel and the vertical direction is vertical to the parallel magnetic field of the desalting flow channel, so that the directions of the electric field force and the Lorentz force applied to the anions and the cations in the seawater are the same, and the desalting efficiency of the system is further improved. The magnetic field formed by the magnet exerts Lorentz force on anions and cations in seawater, so that stable magnetic field intensity can be maintained, desalting energy consumption is lower, and maintenance and management are easy.
The utility model has wide adaptability, can be provided with a desalting mechanism according to different treatment capacity requirements, and has almost no limit to the salinity of the original seawater.
Drawings
FIG. 1 is a schematic view of the working principle of the present invention;
FIG. 2 is a schematic structural view of embodiment 1 of the present invention;
FIG. 3 is a front view of the structure of embodiment 1 of the present invention;
FIG. 4 is a schematic structural diagram of embodiment 2 of the present invention;
FIG. 5 is a front view of the structure of embodiment 2 of the present invention;
FIG. 6 is a schematic structural diagram of embodiment 3 of the present invention;
FIG. 7 is a front view of the structure of embodiment 3 of the present invention.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
The working principle of the utility model is shown in figure 1.
Example 1
Embodiment 1 is a single-cavity type small electromagnetic coupling desalination device, and as shown in fig. 2-3, this embodiment includes a seawater pump 1, a seawater pretreatment device 2 connected to the seawater pump 1, and an electromagnetic coupling desalination device body 3. The seawater pump 1 is used for pumping seawater into the desalination device, the seawater pretreatment device 2 is used for removing suspended impurities in seawater and killing microorganisms and algae in the seawater, and the electromagnetic coupling desalination device body 3 is used for desalination and desalination of seawater.
The seawater pump 1 is communicated with a water inlet of the seawater pretreatment device 2 through a pipeline, and a water outlet of the seawater pretreatment device 2 is communicated with a seawater inlet of the electromagnetic coupling desalination device body 3 through a pipeline.
The electromagnetic coupling desalination device body 3 comprises a fixed electrode 301, a fluid electrode runner 302, an ion exchange membrane 303, a magnet 304, a seawater desalination runner 305, a delivery pump 306, an electrode neutralization chamber 307, an electrode regeneration mechanism 308, a shell 309 of the electromagnetic coupling desalination device body 3, and a base 310 of the electromagnetic coupling desalination device body 3. The electromagnetic coupling desalination device body 3 is a single-stage integrated structure, an external power supply supplies power to the device, an anion exchange membrane is arranged on the outer side of the anode of the fixed electrode, a cation exchange membrane is arranged on the outer side of the cathode of the fixed electrode 301, a fluid electrode runner 302 is arranged between the fixed electrode 301 and the anion exchange membrane and between the fixed electrode 301 and the cation exchange membrane, a fluid electrode is arranged in the fluid electrode runner 302, a seawater desalination runner 305 is formed between the cation exchange membrane and the anion exchange membrane, a discharge port of the electrode runner 302 is connected with a feed port of the electrode neutralization chamber 306, a discharge port of the electrode neutralization chamber 306 is connected with a feed port of the electrode regeneration mechanism 307, a discharge port of the electrode regeneration mechanism 307 is connected with a feed port of the fluid electrode runner 302 to form a closed loop of the fluid electrode, magnets 304 are arranged at the upper part and the lower part of the seawater desalination runner 305, and the magnets are used for generating a magnetic field perpendicular to the seawater desalination runner 305.
In this embodiment, the fixed electrode 301 is a graphite electrode, the fluid electrode flow channel 302 is a direct flow channel, the width of the direct flow channel is 5cm, and the fluid electrode is a uniform suspension obtained by mixing 20% of 300 mesh activated carbon powder, 75% of deionized water, 2.5% of a dispersant, and 2.5% of acetylene black powder and stirring them uniformly. The width of the seawater desalination flow channel 305 is 10cm, and the magnets 304 are permanent magnet plates arranged in parallel on the upper part and the lower part of the seawater desalination flow channel 305. The electrode regeneration mechanism 308 is a single-stage electrodialysis mechanism.
The working mode of the embodiment is as follows:
external seawater is continuously pumped into the seawater pretreatment device 2 through the seawater pump 1 under the pressure of 0.5Mpa, suspended impurities are removed through the seawater pretreatment device 2, microorganisms and algae in the seawater are killed, and then the seawater is continuously sent into the electromagnetic coupling desalination device body 3. Stable direct current is input to the electromagnetic coupling desalination device body 3 through a solar power supply, the direct current voltage is set to be 1.3v, the fixed electrode 301 is in a charging state, a parallel electric field perpendicular to the seawater desalination flow channel 305 is generated, and meanwhile, the magnets 304 arranged in parallel on the upper portion and the lower portion of the seawater desalination flow channel 305 also generate a parallel magnetic field perpendicular to the seawater desalination flow channel 305. The seawater desalination flow channel 305 and the fixed electrode 301 generate parallel electric fields, and the parallel magnetic fields generated by the magnet 304 are mutually vertical in pairs. The flow rate of the seawater in the seawater desalination flow channel 305 is controlled to be 0.5L/min, when the seawater passes through the seawater desalination flow channel 305, anions in the seawater are acted by an electric field force to move towards the anode of the fixed electrode 301, cations move towards the cathode of the fixed electrode 301, and when the anions and the cations are acted by a cutting magnetic induction line in the seawater desalination flow channel 305, the anions and the cations are simultaneously acted by a Lorentz force in the same direction as the electric field force, and under the combined action of the electric field force and the Lorentz force, the anions and the cations are captured by a fluid electrode in the electrode flow channel through an ion exchange membrane, so that the seawater desalination is completed. The flow rate of the fluid electrode was controlled to 0.1L/min.
The regeneration process of the fluid electrode in this example is as follows: after the fluid electrode finishes the capture of the anions and cations, the fluid electrode is pumped by a delivery pump 306 and continuously discharged through a discharge port of an electrode flow channel, enters an electrode neutralization chamber 307, is fully and uniformly mixed in the electrode neutralization chamber 307 to finish neutralization discharge, and is then conveyed by a pipeline to enter an electrode regeneration mechanism 308, wherein the electrode regeneration mechanism 308 is a single-stage electrodialysis mechanism, the salt in the fluid electrode is removed in an electrodialysis mode, and the fluid electrode is desalted and regenerated and then discharged through the discharge port of the desalting regeneration mechanism 308, and is conveyed into the fluid electrode flow channel 302 through the pipeline for recycling. Brine produced in the electrodialysis process is discharged from a brine outlet, and the obtained brine can be further used for salt extraction.
Example 2
Embodiment 2 is a multi-cavity electromagnetic coupling desalination apparatus, as shown in fig. 4-5, the difference between this embodiment and embodiment 1 is that this embodiment is composed of 3 sets of electromagnetic coupling seawater desalination apparatus bodies 3 connected in parallel, which are respectively a first body 3a, a second body 3b, and a third body 3c, a seawater desalination flow channel 305 includes a first seawater desalination flow channel 305a, a second seawater desalination flow channel 305b, and a third seawater desalination flow channel 305c, a fluid electrode flow channel 302 includes a first fluid electrode flow channel 302a, a second fluid electrode flow channel 302b, and a third fluid electrode flow channel 302c, a fixed electrode 301 includes a first fixed electrode 301a, a second fixed electrode 301b, and a third fixed electrode 301c, and a transfer pump 306 includes a first transfer pump 306a, a second transfer pump 306b, and a third transfer pump 306 c. The water outlet of the seawater pretreatment device 2 is connected with the water inlets of the first seawater desalination flow channel 305a, the second seawater desalination flow channel 305b and the third seawater desalination flow channel 305c through a pipeline and a three-way valve, the discharge ports of the first fluid electrode flow channel 302a, the second fluid electrode flow channel 302b and the third fluid electrode flow channel 302c are connected with the electrode neutralization chamber 307 through a pipeline and a three-way valve, the electrode regeneration mechanism 308 is connected with the first fluid electrode flow channel 302a, the second fluid electrode flow channel 302b and the third fluid electrode flow channel 302c through a pipeline and a three-way valve, meanwhile, 3 conveying pumps are arranged in the embodiment and respectively provide power for conveying the fluid electrodes, and the conveying pumps are a first conveying pump 306a, a second conveying pump 306b and a third conveying pump 306 c.
The process of seawater desalination in this embodiment is as follows: the seawater is continuously pumped into the seawater pretreatment device 2 by the seawater pump 1 under the pressure of 0.5Mpa, suspended impurities are removed by the seawater pretreatment device 2, and after microorganisms and algae in the seawater are killed, the seawater is continuously sent into the electromagnetic coupling desalination device body 3. An external power supply provides stable direct current for 3 electromagnetically coupled desalination device bodies, the voltage at the fixed electrodes is set to be 1.3v, so that the first fixed electrode 301a, the second fixed electrode 301b and the third fixed electrode 301c are all in a charging state, the first fixed electrode 301a generates a parallel electric field vertical to the first fluid electrode runner 302a, the second fixed electrode 301b generates a parallel electric field vertical to the second fluid electrode runner 302b, the third fixed electrode 301c generates a parallel electric field vertical to the third fluid electrode runner 302c, and simultaneously magnets arranged on the upper portion and the lower portion of the first seawater desalination runner 305a, magnets on the upper portion and the lower portion of the second seawater desalination runner 305b and magnets on the upper portion and the lower portion of the third seawater desalination runner 305c also generate parallel magnetic fields vertical to the seawater desalination runner, and the desalination runners, the parallel electric fields and the parallel magnetic fields are mutually vertical in pairs, the seawater is desalted and desalted in the desalting flow channel, and the regeneration process of the fluid electrode is the same as that of the embodiment 1.
Example 3
In the figure, 305a, 305b represent two different seawater desalination channels.
The rest is the same as example 1.
Various modifications and variations of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (10)
1. The utility model provides an electromagnetic coupling sea water desalination device, includes the body, the body is equipped with power and fixed electrode, fixed electrode is connected with the power, its characterized in that: the body is also provided with a magnet and an electrode regeneration mechanism, the magnet is used for generating a magnetic field vertical to the seawater desalination flow channel, and the electrode regeneration mechanism is used for regenerating the fluid electrode.
2. The electromagnetic coupling seawater desalination device of claim 1, wherein: the seawater desalination device comprises a seawater pump, a seawater pretreatment device, an electrode neutralization chamber and a delivery pump, wherein a water outlet of the seawater pump is connected with a water inlet of the seawater pretreatment device, a water outlet of the seawater pretreatment device is communicated with a seawater desalination flow channel, a fluid electrode is delivered to the electrode neutralization chamber through the delivery pump, a discharge hole of the electrode neutralization chamber is connected with a feed inlet of an electrode regeneration mechanism, and a discharge hole of the electrode regeneration mechanism is connected with a feed inlet of the electrode flow channel.
3. The electromagnetic coupling seawater desalination device of claim 1, wherein: the fluid electrode is slurry prepared by grinding porous materials.
4. The electromagnetic coupling seawater desalination device of claim 1, wherein: the fixed electrode is preferably a graphite electrode.
5. The electromagnetic coupling seawater desalination device of claim 1, wherein: the power supply is any one of a solar power supply, a wind power supply, a tidal power supply, a geothermal power supply and a storage battery.
6. The electromagnetic coupling seawater desalination device of claim 1, wherein: the fluid electrode flow channel is any one of a single linear flow channel, a multi-linear flow channel and an S-shaped flow channel.
7. The electromagnetic coupling seawater desalination device of claim 1, wherein: the magnet is any one of a permanent magnet plate, a U-shaped magnet and an electric permanent magnet.
8. The electromagnetic coupling seawater desalination device of claim 2, wherein: the electrode neutralization chamber is a horizontal storage tank or a vertical storage tank with a stirring function.
9. The electromagnetic coupling seawater desalination device of claim 1, wherein: the electrode regeneration mechanism regenerates the fluid electrode in an electrodialysis mode.
10. The electromagnetic coupling seawater desalination device of claim 1, wherein: the body is a group of independent arrangement or more than two groups of parallel arrangement.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116239265A (en) * | 2023-03-30 | 2023-06-09 | 中国船舶集团有限公司第七一九研究所 | Sea water desalination device based on magnetic field Hall effect and electric field force |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116239265A (en) * | 2023-03-30 | 2023-06-09 | 中国船舶集团有限公司第七一九研究所 | Sea water desalination device based on magnetic field Hall effect and electric field force |
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