An electroadsorption device based on a magnetic flow electrode and its application

Abstract

This invention discloses an electroadsorption device based on a magnetic flow electrode and its application, as well as a method for water treatment using this electroadsorption device. The electroadsorption device provided in this application includes a first magnetic field generating component and a second magnetic field generating component, enabling the application and control of an external magnetic field. Through external magnetic field control, on the one hand, the in-situ controllable construction of the charge permeation network can be achieved; on the other hand, the viscosity and electronic conductivity of the magnetic flow electrode can be conveniently adjusted. This significantly enhances the capture and mediating effect of pollutants by the electroadsorption device, improving its treatment efficiency and system stability.

Description

Technical Field

[0001] This invention relates to the field of electroadsorption technology, specifically to an electroadsorption device based on a magnetic flow electrode and its application, as well as a method for water treatment using the electroadsorption device. Background Technology

[0002] Life cycle assessment results of the industrial park's reclaimed water reuse system show that using reclaimed water for higher-value reuse will bring greater environmental benefits. Using reclaimed water as a source to produce electronic-grade ultrapure water has become an inevitable trend for the "dual-carbon" development of industries such as electronics and chip manufacturing. Electroadsorption technology can be used to produce electronic-grade ultrapure water and can be used in process and polishing stages to improve water quality. Among them, flowing electrode electroadsorption technology has advantages such as low consumption, no by-product generation, and continuous operation, and is considered an important forward-looking technology for the production of electronic-grade ultrapure water.

[0003] The requirements for electronic-grade ultrapure water include extremely high resistivity (>18.2 MΩ·cm) and extremely low total organic carbon (TOC) (<1.0 μg / L). However, in the production process of electronic-grade ultrapure water, various water sources have identified recalcitrant organic components, including urea, chloroform, dibromochloromethane, alkoxy-containing substances, carbonyl-containing substances, and other small molecules. Existing pure water preparation technologies are insufficient to effectively remove these small molecule organic compounds. Summary of the Invention

[0004] The purpose of this application is to solve the problem that existing pure water preparation technologies are unable to effectively remove small molecule organic matter, and to provide an electroadsorption device based on a magnetic flow electrode and its application, as well as a method for water treatment using the electroadsorption device.

[0005] This application reveals that when magnetic materials such as magnetic activated carbon are used as magnetic flow electrodes, applying an external magnetic field for regulation has significant positive effects, such as enhanced electron transfer. However, carbon-based materials have limited charge storage capacity, resulting in problems such as weak organic matter selectivity, low recovery rate, and poor regeneration performance. Lightweight magnetic resins possess characteristics such as containing magnetic conductive substances, small particle size, easily tunable functional groups, strong organic matter selectivity, and high adsorption capacity and efficiency, making them suitable for use as magnetic flow electrodes regulated by an external magnetic field. Furthermore, the hydraulic characteristics of existing flat-plate electrode devices still need improvement, necessitating the development of more suitable flow electrode devices, such as spiral-wound types. Therefore, developing and constructing spiral-wound magnetic resin flow electrode electroadsorption technology and equipment regulated by an external magnetic field will help solve the problem of easy penetration of small molecule organic matter, providing a theoretical basis and technical support for the preparation of electronic-grade ultrapure water using reclaimed water as a source.

[0006] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, this application provides an electroadsorption device based on a magnetic flow electrode. The electroadsorption device includes an electroadsorption module, which includes a functional layer comprising a first magnetic field generating component, a negative current collector layer, a cation exchange membrane layer, a processing partition layer, an anion exchange membrane layer, a positive current collector layer, and a second magnetic field generating component; wherein...

[0008] The processing partition is located between the cation exchange membrane layer and the anion exchange membrane layer, the negative current collector layer is located between the cation exchange membrane layer and the first magnetic field generating component, and the positive current collector layer is located between the anion exchange membrane layer and the second magnetic field generating component;

[0009] The negative collector layer has a first magnetic flow electrode channel inside, the positive collector layer has a second magnetic flow electrode channel inside, and the processing partition has a processing channel inside.

[0010] In one optional embodiment, the electro-adsorption device is a spiral electro-adsorption device, and the electro-adsorption module is a spiral electro-adsorption module. In the spiral electro-adsorption module, the first magnetic field generating component is cylindrical, and the remaining functional layers are cylindrical and arranged around the first magnetic field generating component in a preset order.

[0011] Optionally, the first magnetic flow electrode channel, the second magnetic flow electrode channel, and the processing channel are all straight channels, and the extension direction of each channel is parallel to the column height direction of the first magnetic field generating component.

[0012] In one optional embodiment, the electro-adsorption device further includes an inlet sealing plate and an outlet sealing plate, wherein the inlet sealing plate is disposed at the inlet end of the electro-adsorption module and the outlet sealing plate is disposed at the outlet end of the electro-adsorption module.

[0013] Optionally, the electroadsorption device further includes an inlet dispensing component and an outlet dispensing component;

[0014] The inlet distribution component is disposed on the inlet sealing plate and communicates with the inlet end of the electro-adsorption module, and is used to distribute the liquid flowing into the electro-adsorption module to the corresponding functional layer.

[0015] The outlet distribution component is disposed on the outlet sealing plate and connected to the outlet end of the electro-adsorption module, and is used to divert the liquid flowing out of the electro-adsorption module.

[0016] In one optional embodiment, the electroadsorption device further includes a positive current collector connector, a negative current collector connector, and a magnetic field control connector.

[0017] The positive collector connector, negative collector connector, and magnetic field control connector are each independently installed on the inlet sealing plate and / or the outlet sealing plate;

[0018] The positive collector electrode connector is connected to the positive collector electrode layer, and the negative collector electrode connector is connected to the negative collector electrode layer;

[0019] The magnetic field control connector is connected to the first magnetic field generating component and the second magnetic field generating component, and is used to control the magnetic field strength between the first magnetic field generating component and the second magnetic field generating component to change periodically.

[0020] In one alternative embodiment, the magnetic flow electrode comprises a magnetic resin;

[0021] Optionally, the magnetic resin includes a magnetic zwitterionic exchange resin;

[0022] Optionally, the magnetic zwitterionic ion exchange resin includes at least one of magnetic styrene-based zwitterionic ion exchange resin, magnetic acrylic-based zwitterionic ion exchange resin, magnetic phenolic-based zwitterionic ion exchange resin, and magnetic vinylpyridine-based zwitterionic ion exchange resin.

[0023] Optionally, the magnetic flow electrode comprises magnetic resin, carbon black, and ultrapure water, wherein the weight ratio of the magnetic resin, the carbon black, and the ultrapure water is (20-70):(0-10):100.

[0024] In one optional embodiment, the electroadsorption module further includes a shell layer, which is disposed outside the functional layer and encloses the functional layer;

[0025] Optionally, the functional layer further includes a first support layer, a first waterproof gasket, a second waterproof gasket, a third waterproof gasket, a fourth waterproof gasket, and a second support layer;

[0026] The first support layer and the first water-proof pad are disposed between the second magnetic field generating component and the positive collector electrode layer, with the first support layer disposed close to the second magnetic field generating component and the first water-proof pad disposed close to the positive collector electrode layer;

[0027] The second water-proof pad is disposed between the anion exchange membrane layer and the treatment partition layer; the third water-proof pad is disposed between the treatment partition layer and the cation exchange membrane layer;

[0028] The fourth water-proof pad and the second support layer are disposed between the negative collector layer and the first magnetic field generating component. The fourth water-proof pad is disposed close to the negative collector layer, and the second support layer is disposed close to the first magnetic field generating component.

[0029] Secondly, this application provides the application of the above-mentioned electroadsorption device in water treatment.

[0030] Thirdly, this application provides a method for water treatment using the above-mentioned electroadsorption device, comprising the following steps:

[0031] The raw water to be treated flows into the treatment channel of the treatment partition, and the magnetic flow electrode flows into the first magnetic flow electrode channel of the negative collector electrode layer and the second magnetic flow electrode channel of the positive collector electrode layer.

[0032] An operating voltage is applied between the negative collector layer and the positive collector layer, while the magnetic field strength between the first magnetic field generating component and the second magnetic field generating component is controlled to change periodically.

[0033] In one optional embodiment, the pH value of the raw water to be treated is 6 to 9; the raw water to be treated contains small molecule organic matter, and the content of the small molecule organic matter is not less than 0.1 μg / L;

[0034] Optionally, the small molecule organic compound includes at least one of urea, chloroform, dibromochloromethane, alkoxy-containing small molecule organic compounds, and carbonyl-containing small molecule organic compounds;

[0035] Optionally, the flow rate of the raw water to be treated is 10 to 5000 mL / min.

[0036] In one optional embodiment, the operating voltage is 0.1–1.24V;

[0037] Optionally, the control of the magnetic field strength between the first magnetic field generating component and the second magnetic field generating component to change periodically includes:

[0038] The magnetic field strength is controlled to be 0–2000 mT, the variation period is 0–10 min, and the variation rate is 0–200 mT / min.

[0039] The technical solution of this application has at least the following beneficial effects:

[0040] (1) The electroadsorption device provided in this application is equipped with a first magnetic field generating component and a second magnetic field generating component, thereby enabling the application and control of an external magnetic field. Through the control of the external magnetic field, on the one hand, the in-situ controllable construction of the charge permeation network can be realized, and on the other hand, the viscosity and electronic conductivity of the magnetic flow electrode can be conveniently adjusted. This can significantly enhance the capture and mediating effect of the electroadsorption device on pollutants, and improve the treatment efficiency and system stability of the electroadsorption device.

[0041] Meanwhile, the electroadsorption device can also create a scenario of electromagnetic synergy, which can improve the migration characteristics of substances within the device. This enhances the device's ability to remove small molecule organic matter through the electromagnetic synergy enhancement mechanism, achieving efficient and deep purification of small molecule organic matter and breaking through the technical bottleneck of preparing electronic-grade ultrapure water using reclaimed water as the water source.

[0042] (2) The electro-adsorption device provided in this application can be a spiral electro-adsorption device. The spiral structure can improve the hydraulic characteristics of the magnetic flow electrode, give full play to the advantages of the magnetic flow electrode, and enhance the adsorption effect of the magnetic flow electrode on small molecule organic matter.

[0043] (3) The electro-adsorption device provided in this application uses a magnetic flow electrode comprising a magnetic resin. The magnetic resin has the characteristics of containing magnetic conductive materials, small particle size, tunable and easy-to-construct functional groups, strong organic selectivity, high adsorption capacity and efficiency. As a magnetic flow electrode, it can enhance the adsorption selectivity and adsorption efficiency of small molecule organic matter.

[0044] Meanwhile, magnetic resin particles are generally spherical with relatively uniform size. Therefore, magnetic resin, as a magnetic flow electrode, has better hydraulic properties and contact mass transfer performance, which can further improve the adsorption effect on small molecule organic matter.

[0045] (4) The electroadsorption device provided in this application features a magnetic resin with high selectivity, effectively adsorbing small molecule organic matter. The electric field alters the material properties of pollutants, allowing the magnetic resin to better adsorb small molecule organic matter. Simultaneously, the system exhibits a scenario where both electric and magnetic fields interact. Under this scenario, the dynamic changes in the magnetic field accelerate the migration and conductivity of substances. Furthermore, the presence of the magnetic field effectively increases the concentration of active electrodes in the vicinity of the current collector. The rapid aggregation process of the magnetic resin during magnetic field modulation increases the effective working area and enhances the electron transfer performance mediated by the magnetic material between the active electrodes. Attached Figure Description

[0046] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0047] Figure 1 The schematic diagram illustrates the structure of the electroadsorption device provided in the embodiments of this application;

[0048] Figure 2 A schematic cross-sectional view of the electroadsorption device provided in an embodiment of this application is shown.

[0049] Figure 3 The schematic diagram illustrates the working principle of the electro-adsorption device provided in the embodiments of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Second magnetic field generating component; 2. First support layer;

[0052] 3. First waterproof gasket; 4. Positive collector layer;

[0053] 5. Anion exchange membrane layer; 6. Second waterproof gasket;

[0054] 7. Treatment of the partition layer; 8. Third waterproof gasket;

[0055] 9. Cation exchange membrane layer; 10. Negative current collector layer;

[0056] 11. Fourth waterproof gasket; 12. Second support layer;

[0057] 13. First magnetic flow electrode channel; 14. Processing channel;

[0058] 15. Second magnetic flow electrode channel; 16. Outer shell layer;

[0059] 17. Positive collector connector; 18. Negative collector connector;

[0060] 19. Import distribution components; 20. Export distribution components;

[0061] 21. Imported sealing plates; 22. Exported sealing plates;

[0062] 23. Magnetic field control connector; 24. First magnetic field generating component;

[0063] 25. Electroadsorption module. Detailed Implementation

[0064] To further illustrate the technical means and results adopted by the present invention to achieve the intended purpose, the following preferred embodiments are used to describe in detail the specific implementation methods, technical solutions, and features according to the present invention. Specific features, structures, or characteristics in the various embodiments described below can be combined in any suitable form.

[0065] Example 1

[0066] This embodiment provides an electroadsorption device based on a magnetic flow electrode.

[0067] Figure 1 The schematic diagram illustrates the structure of the electroadsorption device of this embodiment. Figure 2A schematic cross-sectional view of the electro-adsorption device of this embodiment is shown. Figure 1 and Figure 2 As shown, the electro-adsorption device in this embodiment is a spiral electro-adsorption device, in which each layer overlaps with its center and is nested with each other to form a spiral shape.

[0068] The electro-adsorption device includes an electro-adsorption module 25, an inlet sealing plate 21, an outlet sealing plate 22, an inlet distribution component 19, an outlet distribution component 20, a positive collector electrode connector 17, a negative collector electrode connector 18, and a magnetic field control connector 23.

[0069] An inlet sealing plate 21 is disposed at the inlet end of the electroadsorption module 25, and an outlet sealing plate 22 is disposed at the outlet end of the electroadsorption module 25. An inlet distribution assembly 19 is disposed on the inlet sealing plate 21 and communicates with the inlet end of the electroadsorption module 25, and is used to distribute the liquid flowing into the electroadsorption module 25 to the corresponding functional layer. An outlet distribution assembly 20 is disposed on the outlet sealing plate 22 and communicates with the outlet end of the electroadsorption module 25, and is used to divert the liquid flowing out of the electroadsorption module 25. A positive collector connector 17, a negative collector connector 18, and a magnetic field control connector 23 are each independently disposed on the inlet sealing plate 21 and / or the outlet sealing plate 22.

[0070] The electroadsorption module 25 includes an outer shell layer 16 and a functional layer. The outer shell layer 16 is disposed outside the functional layer and encloses the functional layer. The functional layer includes a first magnetic field generating component 24, a negative current collector layer 10, a cation exchange membrane layer 9, a processing partition layer 7, an anion exchange membrane layer 5, a positive current collector layer 4, a second magnetic field generating component 1, a first support layer 2, a first water-proof gasket 3, a second water-proof gasket 6, a third water-proof gasket 8, a fourth water-proof gasket 11, and a second support layer 12.

[0071] The processing partition 7 is located between the cation exchange membrane layer 9 and the anion exchange membrane layer 5. The negative current collector layer 10 is located between the cation exchange membrane layer 9 and the first magnetic field generating component 24. The positive current collector layer 4 is located between the anion exchange membrane layer 5 and the second magnetic field generating component 1. The first support layer 2 and the first water-proof pad 3 are disposed between the second magnetic field generating component 1 and the positive current collector layer 4, with the first support layer 2 positioned closer to the second magnetic field generating component 1 and the first water-proof pad 3 positioned closer to the positive current collector layer 4. The second water-proof pad 6 is disposed between the anion exchange membrane layer 5 and the processing partition 7; the third water-proof pad 8 is disposed between the processing partition 7 and the cation exchange membrane layer 9. The fourth water-proof pad 11 and the second support layer 12 are disposed between the negative current collector layer 10 and the first magnetic field generating component 24, with the fourth water-proof pad 11 positioned closer to the negative current collector layer 10 and the second support layer 12 positioned closer to the first magnetic field generating component 24.

[0072] The positive collector connector 17 is connected to the positive collector layer 4, and the negative collector connector 18 is connected to the negative collector layer 10. The positive collector connector 17 and the negative collector connector 18 can control the operating voltage between the positive collector layer 4 and the negative collector layer 10 via an external power supply. Alternatively, the materials of the positive collector layer 4 and the negative collector layer 10 can be one or any combination of activated carbon, graphite, or titanium.

[0073] The magnetic field control connector 23 is connected to the first magnetic field generating component 24 and the second magnetic field generating component 1, and is used to control the magnetic field strength between the first magnetic field generating component 24 and the second magnetic field generating component 1 to change periodically. The periodically changing magnetic field can accelerate the movement of the magnetic flow electrode.

[0074] In one optional method, the magnetic field strength is adjusted to between 0 and 2000 mT using an electromagnet. The periodic magnetic field change refers to the change in the magnetic field formed between the second magnetic field generating component 1 and the first magnetic field generating component 24. The direction of the magnetic field change is between two directions: from the outside to the inside and from the inside to the outside. The time for one magnetic field change is 0 to 10 minutes, and the change is gradual, with a gradient of 0 to 200 mT / min.

[0075] The negative collector layer 10 has a first magnetic flow electrode channel 13 inside, the positive collector layer 4 has a second magnetic flow electrode channel 15 inside, and the processing partition layer 7 has a processing channel 14 inside. The electroadsorption device is a spiral-wound electroadsorption device, and the electroadsorption module 25 is a spiral-wound electroadsorption module. In the spiral-wound electroadsorption module, the first magnetic field generating component 24 is cylindrical, and the remaining functional layers are cylindrical and arranged around the first magnetic field generating component 24 in a preset order. Preferably, the length of the spiral-wound electroadsorption module can be 0.5 to 1.5 meters, and the radius can be 10 to 30 centimeters.

[0076] In one alternative configuration, the first magnetic flow electrode channel 13, the second magnetic flow electrode channel 15, and the processing channel 14 are straight channels with a circular cross-section. The extension direction of each channel is parallel to the column height direction of the first magnetic field generating component 24, and they are arranged uniformly on the circumference.

[0077] The magnetic flow electrode may include a magnetic resin. The magnetic resin may include a magnetic zwitterionic exchange resin. Specifically, the magnetic zwitterionic exchange resin may include at least one of magnetic styrene-based zwitterionic exchange resin, magnetic acrylic-based zwitterionic exchange resin, magnetic phenolic-based zwitterionic exchange resin, and magnetic vinylpyridine-based zwitterionic exchange resin. The magnetic particles may be one or a mixture of several of nano-iron oxide, nano-iron-cobalt, and nano-iron-cobalt-nickel, as well as their alloys, possessing magnetic and electrical conductivity properties. Preferably, the magnetic resin may be spherical or elliptical, with a maximum diameter ranging from 0.1 micrometers to 50 micrometers.

[0078] For example, the magnetic flow electrode may include magnetic resin, carbon black and ultrapure water, wherein the weight ratio of magnetic resin, carbon black and ultrapure water may be (20-70):(0-10):100.

[0079] In the electroadsorption device provided in this embodiment, the magnetic flow electrode enters the second magnetic flow electrode channel 15 of the positive current collector layer 4 and the first magnetic flow electrode channel 13 of the negative current collector layer 10 after passing through the inlet distribution assembly 19, and then flows out through the outlet distribution assembly 20. The raw water to be treated enters the treatment channel 14 inside the treatment partition 7 after passing through the inlet distribution assembly 19, and then flows out through the outlet distribution assembly 20. The opposite side of the inlet is the corresponding outlet, and the outlet distribution assembly 20 is responsible for collecting the magnetic flow electrode and the discharged water from the device respectively.

[0080] Figure 3 A schematic diagram illustrating the working principle of the electro-adsorption device of this embodiment is shown. Figure 3 As shown, the raw water to be treated enters the treatment flow channel 14 of the treatment compartment 7 after passing through the inlet distribution component 19. The magnetic resin flow electrode, after passing through the inlet distribution component 19, enters the second flow electrode flow channel 15 of the positive collector layer 4 and the first magnetic flow electrode flow channel 13 of the negative collector layer 10. The negative collector electrode connector 18 is connected to the negative collector layer 10, and the positive collector electrode connector 17 is connected to the positive collector layer 4; both control the voltage between the electrodes. The magnetic field control connector 23 is connected to the second magnetic field generating component 1 and the first magnetic field generating component 24, controlling the generation of a constantly changing magnetic field, which accelerates the movement of the magnetic flow electrode as it flows through the flow channel, improving its flow state. At this time, pollutants will pass from the treatment compartment 7 through the anion exchange membrane 5 or the cation exchange membrane 9, entering the positive collector layer 4 and the negative collector layer 10 respectively, and are adsorbed by the magnetic resin flow electrode in the flow channel. The treated water is discharged through the outlet distribution component 20. The magnetic resin flow electrode that has adsorbed pollutants is also discharged through the outlet distribution component 20, thereby achieving deep purification of small molecule organic matter in the raw water. The magnetic resin that has adsorbed pollutants can be regenerated by using a current source.

[0081] For example, the raw water to be treated in this electroadsorption device can be high-quality reclaimed water with a pH between 6 and 9 and a concentration of various small molecule organic matter between 0.1 and 500 μg / L. The influent flow rate is preferably between 10 and 5000 mL / min. The electrode voltage between the positive current collector layer 4 and the negative current collector layer 10 is preferably between 0.1 and 1.24 V.

[0082] Example 2

[0083] Ultrapure water is prepared by treating reclaimed water using the following method:

[0084] (1) The A1 grade reclaimed water (pH value of 7.2 and total concentration of various small molecule organic matter of 100 μg / L) that meets the "Guidelines for Water Reuse and Classification of Reclaimed Water" GB / T41018-2021 is passed through the inlet distribution component 19 and then enters the treatment flow channel 14 inside the treatment partition 7 at a flow rate of 100 mL / min.

[0085] (2) Magnetic styrene-based zwitterionic exchange resin is used as the magnetic resin material. The composition of the magnetic resin flow electrode includes magnetic resin, carbon black, and ultrapure water, with a mass ratio of 50g magnetic resin: 10g carbon black: 100g ultrapure water. After passing through the inlet distribution component 19, the magnetic resin flow electrode enters the second magnetic flow electrode channel 15 of the positive collector layer 4 and the first magnetic flow electrode channel 13 of the negative collector layer 10.

[0086] (3) The negative collector terminal 18 is connected to the negative collector layer 10, and the positive collector terminal 17 is connected to the positive collector layer 4. The two control the voltage between the plates to be 1.24V.

[0087] (4) The magnetic field control connector 23 connects the second magnetic field generating component 1 and the first magnetic field generating component 24, controlling the generation of a continuously changing magnetic field. This accelerates the movement of the magnetic flow electrode as it flows through the flow channel, improving its flow state. The magnetic field strength is adjusted to 50 mT using an electromagnet. The magnetic field change refers to the change in the magnetic field formed between the second magnetic field generating component 1 and the first magnetic field generating component 24, controlling the direction of the magnetic field (from outside to inside or from inside to outside). The magnetic field change occurs once every 1 minute, with a gradient of 50 mT / min.

[0088] (5) The treated water is discharged through the outlet distribution assembly 20. The magnetic resin flow electrode is discharged through the outlet distribution assembly 20. The entire system operates continuously without interruption and is stable overall. The total concentration of various small molecule organic compounds in the effluent is below the detection limit of 0.1 μg / L, the resistivity is 18.2 MΩ·cm, and the total organic carbon is 1 μg / L. The effluent water quality meets the resistivity and total organic carbon requirements for ultrapure water.

[0089] Example 3

[0090] Ultrapure water is prepared by treating reclaimed water using the following method:

[0091] (1) High-quality reclaimed water with a pH of 7.1 and containing 0.1 μg / L of carbonyl organic matter (total concentration of various small molecule organic matter is 10 μg / L) enters the treatment flow channel 14 inside the treatment partition 7 after passing through the inlet distribution component 19, with a flow rate of 200 mL / min.

[0092] (2) Magnetic acrylic zwitterionic exchange resin is used as the magnetic resin material. The composition of the magnetic resin flow electrode includes magnetic resin, carbon black, and ultrapure water, with a mass ratio of 70g magnetic resin: 10g carbon black: 100g ultrapure water. After passing through the inlet distribution component 19, the magnetic resin flow electrode enters the second magnetic flow electrode channel 15 of the positive collector layer 4 and the first magnetic flow electrode channel 13 of the negative collector layer 10.

[0093] (3) The negative collector terminal 18 is connected to the negative collector layer 10, and the positive collector terminal 17 is connected to the positive collector layer 4. The two control the voltage between the plates to be 1.20V.

[0094] (4) The magnetic field control connector 23 connects the second magnetic field generating component 1 and the first magnetic field generating component 24, controlling the generation of a continuously changing magnetic field. This accelerates the movement of the magnetic flow electrode as it flows through the flow channel, improving its flow state. The magnetic field strength is adjusted to 80 mT using an electromagnet. The magnetic field change refers to the change in the magnetic field formed between the second magnetic field generating component 1 and the first magnetic field generating component 24, controlling the direction of the magnetic field (from outside to inside or from inside to outside). The magnetic field change occurs once every 2 minutes, with a gradient of 60 mT / min.

[0095] (5) The treated water is discharged through the outlet distribution assembly 20. The magnetic resin flow electrode is discharged through the outlet distribution assembly 20. The entire system operates continuously without interruption and is stable overall. The total concentration of various small molecule organic compounds in the effluent is below the detection limit of 0.1 μg / L, the resistivity is 18.2 MΩ·cm, and the total organic carbon is 1 μg / L. The effluent water quality meets the resistivity and total organic carbon requirements for ultrapure water.

[0096] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An electro-adsorption device based on a magnetic flow electrode, characterized in that, The electro-adsorption device is a spiral-wound electro-adsorption device, including an electro-adsorption module (25), specifically a spiral-wound electro-adsorption module. The electro-adsorption module (25) includes a functional layer, which includes a first magnetic field generating component (24), a negative current collector layer (10), a cation exchange membrane layer (9), a processing partition layer (7), an anion exchange membrane layer (5), a positive current collector layer (4), and a second magnetic field generating component (1). Here, the first magnetic field generating component (24) is cylindrical, and the remaining functional layers are cylindrical and arranged around the first magnetic field generating component (24) in a preset order. The electroadsorption module (25) mentioned above also includes a shell layer (16), which is disposed outside the functional layer and wraps the functional layer; The aforementioned functional layers include a first support layer (2), a first water-proof pad (3), a second water-proof pad (6), a third water-proof pad (8), a fourth water-proof pad (11), and a second support layer (12); the first support layer (2) and the first water-proof pad (3) are disposed between the second magnetic field generating component (1) and the positive collecting electrode layer (4), the first support layer (2) is disposed close to the second magnetic field generating component (1), and the first water-proof pad (3) is disposed close to the positive collecting electrode layer (4); the second water-proof pad (6) is disposed between the anion exchange membrane layer (5) and the processing partition layer (7); the third water-proof pad (8) is disposed between the processing partition layer (7) and the cation exchange membrane layer (9); the fourth water-proof pad (11) and the second support layer (12) are disposed between the negative collecting electrode layer (10) and the first magnetic field generating component (24), the fourth water-proof pad (11) is disposed close to the negative collecting electrode layer (10), and the second support layer (12) is disposed close to the first magnetic field generating component (24); The aforementioned processing partition (7) is located between the cation exchange membrane layer (9) and the anion exchange membrane layer (5), the negative current collector layer (10) is located between the cation exchange membrane layer (9) and the first magnetic field generating component (24), and the positive current collector layer (4) is located between the anion exchange membrane layer (5) and the second magnetic field generating component (1). The negative collector layer (10) has a first magnetic flow electrode channel (13) inside, the positive collector layer (4) has a second magnetic flow electrode channel (15) inside, and the processing partition layer (7) has a processing channel (14) inside. The magnetic flow electrode comprises magnetic resin, carbon black, and ultrapure water in a weight ratio of (20-70):(0-10):100; the magnetic resin is a magnetic zwitterionic exchange resin, which includes at least one of magnetic styrene zwitterionic exchange resin, magnetic acrylic zwitterionic exchange resin, magnetic phenolic zwitterionic exchange resin, and magnetic vinylpyridine zwitterionic exchange resin.

2. The electroadsorption device according to claim 1, characterized in that, The first magnetic flow electrode channel (13), the second magnetic flow electrode channel (15) and the processing channel (14) are all straight channels, and the extension direction of each channel is parallel to the column height direction of the first magnetic field generating component (24).

3. The electroadsorption device according to claim 1, characterized in that, The electro-adsorption device includes an inlet sealing plate (21) and an outlet sealing plate (22). The inlet sealing plate (21) is located at the inlet end of the electro-adsorption module (25), and the outlet sealing plate (22) is located at the outlet end of the electro-adsorption module (25). The electro-adsorption device also includes an inlet distribution component (19) and an outlet distribution component (20); the inlet distribution component (19) is disposed on the inlet sealing plate (21) and connected to the inlet end of the electro-adsorption module (25), and is used to distribute the liquid flowing into the electro-adsorption module (25) to the corresponding functional layer. The outlet distribution component (20) is disposed on the outlet sealing plate (22) and connected to the outlet end of the electro-adsorption module (25) for diverting the liquid flowing out of the electro-adsorption module (25).

4. The electroadsorption device according to claim 3, characterized in that, The electro-adsorption device also includes a positive current collector connector (17), a negative current collector connector (18), and a magnetic field control connector (23). The positive collector connector (17), negative collector connector (18) and magnetic field control connector (23) are each independently installed on the inlet sealing plate (21) and / or the outlet sealing plate (22); The positive collector connector (17) is connected to the positive collector layer (4), and the negative collector connector (18) is connected to the negative collector layer (10); The magnetic field control connector (23) is connected to the first magnetic field generating component (24) and the second magnetic field generating component (1) to control the magnetic field strength between the first magnetic field generating component (24) and the second magnetic field generating component (1) to change periodically.

5. The application of the electroadsorption device according to any one of claims 1 to 4 in water treatment.

6. A method for water treatment using the electroadsorption device of claim 1, characterized in that, Includes the following steps: The raw water to be treated flows into the treatment channel (14) of the treatment partition (7), and the magnetic flow electrode flows into the first magnetic flow electrode channel (13) of the negative collector layer (10) and the second magnetic flow electrode channel (15) of the positive collector layer (4). A working voltage is applied between the negative collector layer (10) and the positive collector layer (4), while the magnetic field strength between the first magnetic field generating component (24) and the second magnetic field generating component (1) is controlled to change periodically.

7. The method according to claim 6, characterized in that, The pH value of the raw water to be treated is 6 to 9; the raw water to be treated contains small molecule organic matter, the content of which is not less than 0.1 μg / L, and the small molecule organic matter includes at least one of urea, chloroform, dibromochloromethane, alkoxy-containing small molecule organic matter, and carbonyl-containing small molecule organic matter; the flow rate of the raw water to be treated is 10 to 5000 mL / min.

8. The method according to claim 7, characterized in that, The operating voltage is 0.1–1.24V; The parameters for controlling the periodic change of the magnetic field strength between the first magnetic field generating component (24) and the second magnetic field generating component (1) are: controlling the magnetic field strength to be 0 to 2000 mT, the change period to be 0 to 10 min, and the change rate to be 0 to 200 mT / min.

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