Magnetic enhanced type electro-adsorption chlorine extraction device and method

Abstract

The invention provides a magnetic strengthening type electro-adsorption chlorine extraction device and method, and relates to the technical field of desulfurization wastewater treatment.The magnetic strengthening type electro-adsorption chlorine extraction device comprises a shell, an electro-adsorption assembly and a direct-current voltage-stabilized power source, and the electro-adsorption assembly is arranged in a containing cavity and comprises an anode guide plate and a cathode guide plate; the anode guide plate, the cathode guide plate and the inner wall surface of the accommodating cavity jointly define an adsorption chamber suitable for introducing desulfurization wastewater, one side, facing the adsorption chamber, of each of the anode guide plate and the cathode guide plate is provided with an electrode channel, and the electrode channels are suitable for introducing a magnetic electrode solution; the anode of the direct-current stabilized power supply is electrically connected with the anode guide plate, and the cathode of the direct-current stabilized power supply is electrically connected with the cathode guide plate; the chlorine extraction device has a magnetic field in which at least part of the electrode channel is located. According to the invention, the electrode particles in the magnetic electrode solution can be gathered together by using the magnetic field, so that the electron transmission capability among the electrode particles is enhanced, and the problems of low electron transmission efficiency and low adsorption capability caused by poor electrode conduction continuity are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of desulfurization wastewater treatment, and particularly relates to a magnetic enhanced electrodeposition chlor-alkali device and method. BACKGROUND

[0002] Desulfurization wastewater treatment mainly has two processes of membrane concentration and thermal concentration, but the two processes have problems of high investment cost, large floor area and high operation cost. The flow electrode capacitive deionization technology (FCDI) is a new type of electrochemical adsorption method formed by combining ion exchange membrane and flow electrode on the basis of CDI technology, which greatly increases the electrode ion adsorption capacity and enhances the system desalination efficiency, so that the ion removal process is highly efficient and sustainable, and the limitations of typical CDI systems can be effectively overcome.

[0003] Therefore, the FCDI technology is used to realize green and low-cost treatment of desulfurization wastewater in the related art, however, the adsorption capacity of the FCDI technology is affected by poor electrode conductivity continuity, resulting in low electron transmission efficiency and ion adsorption capacity, which affects the desulfurization wastewater treatment efficiency. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, an embodiment of one aspect of the present application proposes a magnetic enhanced electrodeposition chlor-alkali device, which can use a magnetic field to gather electrode particles in a magnetic electrode solution together to enhance the electron transmission capacity between the electrode particles, solve the problem of low electron transmission efficiency and adsorption capacity caused by poor electrode conductivity continuity, and improve the desulfurization wastewater treatment efficiency.

[0006] An embodiment of another aspect of the present application proposes a magnetic enhanced electrodeposition chlor-alkali method.

[0007] According to the magnetic enhanced electrodeposition chlor-alkali device of an embodiment of the present application, the magnetic enhanced electrodeposition chlor-alkali device comprises a shell, an electrodeposition assembly and a direct current stabilized power supply, the shell has a containing cavity, the electrodeposition assembly is arranged in the containing cavity and comprises an anode flow guide plate and a cathode flow guide plate, the anode flow guide plate and the cathode flow guide plate are arranged at intervals in a first direction, the anode flow guide plate, the cathode flow guide plate and the inner wall surface of the containing cavity jointly define an adsorption chamber suitable for passing desulfurization wastewater, each of the anode flow guide plate and the cathode flow guide plate is provided with an electrode passage on the side facing the adsorption chamber, and the electrode passage is suitable for passing a magnetic electrode solution; the positive electrode of the direct current stabilized power supply is electrically connected with the anode flow guide plate, and the negative electrode of the direct current stabilized power supply is electrically connected with the cathode flow guide plate; the chlor-alkali device has a magnetic field, and at least part of the electrode passage is located in the magnetic field.

[0008] According to the magnetic enhanced electro-adsorption chlorine extraction device, the desulfurization wastewater is introduced into the adsorption chamber, and the magnetic electrode solution with a set flow rate is introduced into the electrode channel. Under the action of the magnetic field, the magnetic electrode particles in the magnetic electrode solution are gathered together in the part of the electrode channel located in the magnetic field, so as to enhance the electron transmission capacity of the magnetic electrode solution. The constant working voltage is applied to the electro-adsorption assembly by the direct current stabilized power supply, so as to ensure the working stability of the chlorine extraction device. Under the action of the electric field force, the anions in the desulfurization wastewater are enriched on the magnetic electrode in the electrode channel of the anode flow guide plate, and the cations in the desulfurization wastewater are enriched on the magnetic electrode in the electrode channel of the cathode flow guide plate. The anions include chloride ions. Then, the desulfurization wastewater after the extraction of chlorine is discharged from the adsorption chamber, and the magnetic electrode solution enriched with anions or cations flows out of the electrode channel, so that the desulfurization wastewater is treated by the extraction of chlorine. Compared with the related art, the electrode particles in the magnetic electrode solution are gathered together by the magnetic field, so as to enhance the electron transmission capacity between the electrode particles, solve the problem of low electron transmission efficiency and adsorption capacity caused by poor electrode conductivity continuity, and improve the desulfurization wastewater treatment efficiency.

[0009] In some embodiments, the electrode channel of at least one of the anode flow guide plate and the cathode flow guide plate is a spiral electrode channel. The anode flow guide plate and the cathode flow guide plate are both conductive metal plates.

[0010] In some embodiments, the electro-adsorption assembly further comprises a monovalent anion exchange membrane and a cation exchange membrane arranged in the adsorption chamber. The side of the anode flow guide plate facing the adsorption chamber is connected to the monovalent anion exchange membrane, and the side of the cathode flow guide plate facing the adsorption chamber is connected to the cation exchange membrane. The monovalent anion exchange membrane and the cation exchange membrane are arranged in the first direction and define a desalination area in the adsorption chamber. The shell is provided with a water inlet and a water outlet communicating with the desalination area. The water inlet is adapted to communicate with a desulfurization wastewater source to introduce the desulfurization wastewater into the desalination area.

[0011] In some embodiments, the anode flow guide plate and the cathode flow guide plate are both at least one and are arranged alternately in the first direction. The adsorption chamber is defined by any anode flow guide plate, adjacent cathode flow guide plate and inner wall surface of the accommodating cavity. The monovalent anion exchange membrane and the cation exchange membrane are both at least one and correspond to the adsorption chamber one by one.

[0012] In some embodiments, the electro-adsorption assembly further comprises an insulating piece located in the desalination zone and sandwiched between the monovalent anion exchange membrane and the cation exchange membrane, the insulating piece being provided with through holes penetrating through the insulating piece along the first direction, the through holes corresponding to the electrode channels, the water inlet, the through holes and the water outlet being sequentially communicated; In a projection plane perpendicular to the first direction, a projection outer contour of the electrode channel is located within a projection outer contour of the through hole.

[0013] In some embodiments, the insulating piece is an insulating gasket, a thickness direction of the insulating gasket being consistent with the first direction, a thickness of the insulating gasket being t, and t being 2-6 mm.

[0014] In some embodiments, the chlorine extraction device further comprises a first magnet and a second magnet, the first magnet and the second magnet being respectively arranged on two sides of the shell along the first direction, the magnetic field being formed between the first magnet and the second magnet. The electrode channel of each of the anode flow guide plate and the cathode flow guide plate is completely located in the magnetic field.

[0015] In some embodiments, the chlorine extraction device further comprises a mixing tank for containing the magnetic electrode solution, an outlet of the mixing tank being communicated with the electrode channel inlet of each of the anode flow guide plate and the cathode flow guide plate, and an inlet of the mixing tank being communicated with the electrode channel outlet of each of the anode flow guide plate and the cathode flow guide plate. The outlet of the mixing tank is located below the inlet of the mixing tank in the up-down direction.

[0016] In some embodiments, a first delivery pump is arranged between the outlet of the mixing tank and the electrode channel inlet of the anode flow guide plate. A second delivery pump is arranged between the outlet of the mixing tank and the electrode channel inlet of the cathode flow guide plate.

[0017] According to an embodiment of the present application, a magnetic enhanced electro-adsorption method for extracting chlorine is provided, the method comprising the following steps: Preparation, desulfurization wastewater is introduced into the adsorption chamber, and a magnetic electrode solution with a set flow rate is introduced into the electrode channel, a portion of the electrode channel located in the magnetic field is used to concentrate electrode particles in the magnetic electrode solution under the action of the magnetic field, so as to enhance the electron transmission capacity of the magnetic electrode solution. Electroadsorption involves applying a constant operating voltage to the electroadsorption component using a DC regulated power supply. Under the action of an electric field, anions in the desulfurization wastewater are adsorbed onto the magnetic electrodes in the electrode channels of the anode guide plate, resulting in an anion-rich solution. Similarly, cations in the desulfurization wastewater are adsorbed onto the magnetic electrodes in the electrode channels of the cathode guide plate, resulting in a cation-rich solution. The anions include chloride ions. The desulfurization wastewater after chlorination is discharged from the adsorption chamber, and the anion enrichment solution and the cation enrichment solution flow out of the electrode channel.

[0018] The technical advantages of the magnetically enhanced electroadsorption chlorine extraction method according to the embodiments of the present invention are the same as those of the magnetically enhanced electroadsorption chlorine extraction device described above, and will not be repeated here.

[0019] In some embodiments, during the electroadsorption operation, monovalent anions migrate through the monovalent anion exchange membrane to the electrode channel of the anode guide plate, and cations migrate through the cation exchange membrane to the electrode channel of the cathode guide plate.

[0020] In some embodiments, after the drainage operation, the chlorine extraction method further includes: The anion-enriched solution and the cation-enriched solution are returned to the mixing tank for regeneration and then neutralized and regenerated to obtain concentrated brine and magnetic electrode solution. The concentrated brine is the supernatant in the mixing tank, and the magnetic electrode solution is the precipitate in the mixing tank.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a magnetically enhanced electro-adsorption chlorine extraction device according to an embodiment of the present invention (insulating components are not shown in the figure).

[0023] Figure 2 This is a schematic diagram of the connection structure between the outer shell, the monovalent anion exchange membrane, the cation exchange membrane and the insulating component in the magnetically enhanced electro-adsorption chlorine extraction device according to an embodiment of the present invention (electrode channels are not shown in the figure).

[0024] Figure 3 This is a schematic flowchart of a magnetically enhanced electroadsorption chlorine extraction method according to an embodiment of the present invention.

[0025] Figure label: 1. Outer shell; 11. Receptacle; 12. Inlet; 13. Outlet; 2. Electroadsorption assembly; 21. Anode guide plate; 22. Cathode guide plate; 23. Adsorption chamber; 231. Desalination zone; 24. Electrode channel; 25. Monovalent anion exchange membrane; 26. Cation exchange membrane; 27. Insulating component; 271. Through hole; 3. DC regulated power supply; 4. The first magnet; 5. The second magnet; 6. Mixing tank; 61. First transfer pump; 62. Second transfer pump. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figure 1 As shown, an embodiment of the present invention provides a magnetically enhanced electro-adsorption chlorine extraction device, comprising a housing 1, an electro-adsorption component 2, and a DC regulated power supply 3. The housing 1 has a accommodating cavity 11. The electro-adsorption component 2 is disposed in the accommodating cavity 11 and includes an anode guide plate 21 and a cathode guide plate 22. The anode guide plate 21 and the cathode guide plate 22 are arranged at intervals in a first direction. The anode guide plate 21, the cathode guide plate 22, and the inner wall surface of the accommodating cavity 11 together define an adsorption chamber 23 suitable for introducing desulfurization wastewater. Each of the anode guide plate 21 and the cathode guide plate 22 has an electrode channel 24 on the side facing the adsorption chamber 23. The electrode channel 24 is suitable for introducing a magnetic electrode solution. The positive terminal of the DC regulated power supply 3 is electrically connected to the anode guide plate 21, and the negative terminal of the DC regulated power supply 3 is electrically connected to the cathode guide plate 22. The chlorine extraction device has a magnetic field, and at least a portion of the electrode channel 24 is located in the magnetic field.

[0028] According to an embodiment of the present invention, a magnetically enhanced electroadsorption chlorination device is used to introduce desulfurization wastewater into the adsorption chamber 23 and introduce a magnetic electrode solution with a set flow rate into the electrode channel 24. Under the action of a magnetic field, the portion of the electrode channel 24 located in the magnetic field can aggregate the magnetic electrode particles in the magnetic electrode solution to enhance the electron transport capability of the magnetic electrode solution. The DC regulated power supply 3 can apply a constant operating voltage to the electroadsorption component 2 to ensure the working stability of the chlorination device. Under the action of the electric field, anions in the desulfurization wastewater can be enriched on the magnetic electrodes in the electrode channel 24 of the anode guide plate 21. Meanwhile, the cations in the desulfurization wastewater are enriched on the magnetic electrodes in the electrode channel 24 of the cathode guide plate 22. The anions include chloride ions. After chlorination, the desulfurization wastewater is discharged from the adsorption chamber 23, while the magnetic electrode solution enriched with anions or cations flows out of the electrode channel 24, thereby realizing the chlorination treatment of the desulfurization wastewater. Therefore, compared with related technologies, the present invention can use a magnetic field to gather the electrode particles in the magnetic electrode solution together to enhance the electron transport capacity between the electrode particles, solve the problem of low electron transport efficiency and low adsorption capacity caused by poor electrode conductivity continuity, and improve the desulfurization wastewater treatment efficiency.

[0029] Understandably, this invention utilizes a magnetic field to aggregate magnetic electrode particles in a magnetic electrode solution, enhancing electron transport performance between the electrode particles. This improves the desalination efficiency of the chlorination unit, as well as its continuous operation and rapid solid-liquid separation capabilities. Compared to membrane concentration and thermal concentration technologies primarily used in desulfurization wastewater treatment in related technologies, magnetic FCDI technology can achieve dechlorination and hardening treatment of desulfurization wastewater with significantly reduced or even no chemical reagents and at lower operating costs, thereby achieving the goal of green, low-cost, and volume-reduced desulfurization wastewater treatment.

[0030] Specifically, the first direction can be the thickness direction of each of the anode guide plate 21 and the cathode guide plate 22, such as the left-right direction in the figure. The inner wall surface of the accommodating cavity 11 is the wall surface in the inner wall surface of the outer shell 1 used to form the accommodating cavity 11. Electrode channels 24 can be engraved on the side wall surface of each of the anode guide plate 21 and the cathode guide plate 22 facing the adsorption chamber 23. The magnetic electrodes in the magnetic electrode solution are generally composed of ferrite permanent magnet materials and carbon-based materials in a certain proportion. For example, the magnetic electrode particles are composed of ferrite permanent magnet materials and carbon-based materials such as activated carbon, carbon nanotubes, and graphene in a certain proportion, which have large specific surface area, good conductivity, and low cost, and are mixed in a certain amount of desulfurization wastewater to form a magnetic electrode mixed slurry, i.e., a magnetic electrode solution. In addition, in actual operation, the proportion of permanent magnet materials in the magnetic electrodes can be determined according to the strength of the magnetic field, with the standard that the magnetic electrodes can pass through the electrode channels 24 uniformly and continuously without clumping. The set flow rate of the magnetic electrode solution can be determined comprehensively based on factors such as the strength of the magnetic field, the proportion of permanent magnet material in the magnetic electrode, the influent flow rate of the desulfurization wastewater, and the effluent desalination rate of the desulfurization wastewater.

[0031] Preferably, the electrode channel 24 is located entirely in the magnetic field, so that the magnetic electrode particles in the magnetic electrode solution flowing throughout the electrode channel 24 are gathered everywhere along the extension direction of the electrode channel 24. In other words, the entire electrode channel 24 is conductive and continuous with strong conductivity, thereby further improving the electron transport efficiency.

[0032] like Figure 1 As shown, in some embodiments, at least one of the anode guide plate 21 and the cathode guide plate 22 has a spiral electrode channel 24 to extend the flow path of the magnetic electrode solution in the electrode channel 24, ensuring the removal effect of anions and cations in the desulfurization wastewater. This allows for the fabrication of a longer electrode channel 24 on a small-sized guide plate (including the anode guide plate 21 and the cathode guide plate 22), thereby reducing the overall volume of the chlorination device.

[0033] Both the anode guide plate 21 and the cathode guide plate 22 are conductive metal plates.

[0034] Specifically, the electrode channel 24 of the anode guide plate 21 is a spiral electrode channel; or, the electrode channel 24 of the cathode guide plate 22 is a spiral electrode channel; or, the electrode channel 24 of both the anode guide plate 21 and the cathode guide plate 22 is a spiral electrode channel. Both the anode guide plate 21 and the cathode guide plate 22 are made of a metal material with good electrical conductivity.

[0035] like Figure 1 and Figure 2As shown, in some embodiments, the electroadsorption assembly 2 further includes a monovalent anion exchange membrane 25 and a cation exchange membrane 26 disposed in the adsorption chamber 23. The side of the anode guide plate 21 facing the adsorption chamber 23 is connected to the monovalent anion exchange membrane 25, and the side of the cathode guide plate 22 facing the adsorption chamber 23 is connected to the cation exchange membrane 26.

[0036] The monovalent anion exchange membrane 25 and cation exchange membrane 26 are arranged at intervals along the first direction and define a desalination zone 231 in the adsorption chamber 23. The outer shell 1 is provided with an inlet 12 and an outlet 13 that communicate with the desalination zone 231. The inlet 12 is adapted to communicate with a desulfurization wastewater source to introduce desulfurization wastewater into the desalination zone 231.

[0037] It is understandable that the desulfurization wastewater source can enter the desalination zone 231 through the inlet 12. After the DC regulated power supply 3 applies a constant working voltage to the electro-adsorption component 2, under the action of the electric field force, the chlorine (i.e., Cl) in the desulfurization wastewater is removed. - SO4 ions migrate through the monovalent anion exchange membrane 25 to the surface of the anode guide plate 21, and are finally adsorbed on the magnetic electrodes in the spiral electrode channels on the surface of the anode guide plate 21. 2- Calcium (i.e., Ca) in desulfurization wastewater cannot pass through a monovalent anion exchange membrane 25. 2 + ), magnesium (i.e. Mg) 2+ Cations such as cations migrate through the cation exchange membrane 26 to the surface of the cathode guide plate 22 and are eventually adsorbed on the magnetic electrodes in the spiral electrode channel on the surface of the cathode guide plate 22. The product water between the anion and cation exchange membranes (i.e. the desulfurization wastewater after chlorination) is discharged from the outlet 13.

[0038] Among them, the monovalent anion exchange membrane 25 can improve the selectivity and adsorption efficiency of chloride ions, so as to achieve the reduction of chloride ion in desulfurization wastewater by transferring chloride ions.

[0039] Specifically, the monovalent anion exchange membrane 25 is typically formed by adding organic or inorganic nanoparticles to a commercially available anion exchange membrane to reduce the membrane's pore size, thereby hindering the passage of particles with large radii of hydrated ions. The monovalent anion exchange membrane 25 can be tightly attached to the surface of the anode guide plate 21 and has the same surface area as the anode guide plate 21, while the cation exchange membrane 26 can be tightly attached to the surface of the cathode guide plate 22 and has the same surface area as the cathode guide plate 22.

[0040] In some embodiments, there is at least one anode guide plate 21 and one cathode guide plate 22, which are alternately arranged along a first direction (not shown in the figure). The adsorption chamber 23 is defined by any anode guide plate 21, adjacent cathode guide plates 22, and the inner wall surface of the accommodating cavity 11. In other words, one or more cathode and anode guide plates (i.e., cathode guide plates 22 and anode guide plates 21) can be alternately arranged in the accommodating cavity 11. The left and right side walls of each cathode and anode guide plate are engraved with spiral electrode channels. Cation exchange membranes 26 are provided on the left and right sides of each cathode guide plate 22, and monovalent anion exchange membranes 25 are provided on the left and right sides of each anode guide plate 21. The cathode and anode guide plates adjacent to the inner wall surface of the accommodating cavity 11 are single-sided plates, that is, only the side away from the accommodating cavity 11 is engraved with spiral electrode channels and provided with corresponding anion and cation exchange membranes (i.e., monovalent anion exchange membranes 25 and cation exchange membranes 26).

[0041] There is at least one anion exchange membrane 25 and one cation exchange membrane 26, each corresponding to an adsorption chamber 23. A product water channel, i.e., desalination zone 231, is formed between each set of anion and cation exchange membranes.

[0042] Understandably, the above structural design can further improve the chlorine extraction efficiency of the chlorine extraction device for desulfurization wastewater, thereby ensuring the treatment efficiency of the desulfurization wastewater. Moreover, the overall structure is compact, occupies a small area, and has low energy consumption.

[0043] like Figure 2 As shown, in some embodiments, the electroadsorption assembly 2 further includes an insulating member 27. The insulating member 27 is located in the desalination zone 231 and sandwiched between the monovalent anion exchange membrane 25 and the cation exchange membrane 26. In other words, one side wall of the insulating member 27 along the first direction abuts against the side of the monovalent anion exchange membrane 25 away from the anode guide plate 21, and the other side wall abuts against the side of the cation exchange membrane 26 away from the cathode guide plate 22. The insulating member 27 is provided with a through hole 271 extending through the insulating member 27 along the first direction. The through hole 271 corresponds to the electrode channel 24, and the inlet 12, the through hole 271, and the outlet 13 are connected in sequence.

[0044] On the projection plane orthogonal to the first direction, the projected outer contour of the electrode channel 24 is located within the projected outer contour of the through hole 271, or in other words, the area of ​​the through hole 271 is slightly larger than the area of ​​the electrode channel 24.

[0045] It is understandable that the insulating component 27 can achieve electrical insulation between the anode guide plate 21 and the cathode guide plate 22, while the through hole 271 can ensure the removal of ions (or electro-adsorption operation) of desulfurization wastewater in the desalination zone 231. Therefore, the structure of the insulating component 27 can ensure the normal operation of the electro-adsorption component 2 of the chlorination device.

[0046] like Figure 2 As shown, in some embodiments, the insulating element 27 is an insulating washer, the thickness direction of the insulating washer is consistent with the first direction, the thickness of the insulating washer is t, and t is 2-6mm. For example, t can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0047] It is understandable that the above structural design can ensure the normal operation of the electro-adsorption component 2 of the chlorine extraction device.

[0048] like Figure 1 As shown, in some embodiments, the chlorine removal device further includes a first magnet 4 and a second magnet 5, which are respectively disposed on both sides of the outer casing 1 along a first direction, and a magnetic field is formed between the first magnet 4 and the second magnet 5.

[0049] The electrode channels 24 of each of the anode guide plate 21 and the cathode guide plate 22 are completely located in the magnetic field.

[0050] It is understandable that a magnetic field structure can be formed by the combination of the first magnet 4 and the second magnet 5. The structure is simple and the operation and maintenance costs are low.

[0051] Specifically, the first magnet 4 and the second magnet 5 can both be installed on the opposite side walls of the outer casing 1 along the first direction to form an external magnetic field.

[0052] like Figure 1 As shown, in some embodiments, the chlorine removal device further includes a mixing tank 6, which is used to contain the magnetic electrode solution and may contain desulfurization wastewater. The outlet of the mixing tank 6 is connected to the inlet of the electrode channel 24 of each of the anode guide plate 21 and the cathode guide plate 22, and the inlet of the mixing tank 6 is connected to the outlet of the electrode channel 24 of each of the anode guide plate 21 and the cathode guide plate 22. The outlet of the mixing box 6 is located below the inlet of the mixing box 6 in the vertical direction. The outlet of the mixing box 6 can be opened at the bottom of the mixing box 6, and the inlet of the mixing box 6 can be opened on the side wall of the mixing box 6. This facilitates the recirculation of the magnetic electrode solution to the electrode channel 24. At the same time, when the magnetic electrode solution enriched with anions or cations flows back from the electrode channel 24 to the mixing box 6, it is not easy to interfere with the magnetic electrode solution below the mixing box 6, which can ensure the working performance of the electroadsorption component 2.

[0053] Understandably, after the magnetic electrode solutions enriched with anions and cations flow out of electrode channel 24, they can be returned to mixing tank 6 for mixing. At this time, the magnetic electrodes achieve desorption and regeneration through charge neutralization, and the temporarily adsorbed anions and cations are quickly released into the desulfurization wastewater in mixing tank 6, so that the water sample at the top of mixing tank 6 is the concentrated brine after desorption by the magnetic electrodes, while the desorbed magnetic electrode particles are rapidly aggregated and precipitated at the bottom of mixing tank 6 due to gravity and magnetic force.

[0054] Specifically, the mixing tank 6 may have two inlets, which are respectively connected to the electrode channel 24 outlet of each of the anode guide plate 21 and the cathode guide plate 22, and the mixing tank 6 may have two outlets, which are respectively connected to the electrode channel 24 inlet of each of the anode guide plate 21 and the cathode guide plate 22.

[0055] It should be noted that the concentrated brine can be solidified after collection.

[0056] like Figure 1 As shown, in some embodiments, a first delivery pump 61 is provided between the outlet of the mixing tank 6 and the inlet of the electrode channel 24 of the anode guide plate 21.

[0057] A second delivery pump 62 is provided between the outlet of the mixing tank 6 and the inlet of the electrode channel 24 of the cathode guide plate 22.

[0058] It is understood that the desorbed magnetic electrode solution can be continuously transported to the electro-adsorption component 2 (i.e., the electrode channel 24) in the magnetic FCDI device (i.e., the chlorination device) through the first transfer pump 61 and the second transfer pump 62, thereby achieving continuous, stable and efficient desalination of the magnetic FCDI device.

[0059] Therefore, compared with related technologies, the present invention has the following advantages: 1) By organically combining the monovalent anion exchange membrane 25 into the magnetic FCDI device, the problem of low electron transport efficiency and low adsorption capacity caused by poor electrode conductivity continuity in ordinary FCDI devices can be solved. It can also selectively transfer chloride ions in desulfurization wastewater to achieve the reduction treatment of desulfurization wastewater. 2) Using this chlorination removal device to treat desulfurization wastewater by removing chlorine and reducing its volume has the advantages of low pretreatment requirements, low energy consumption, simple operation and maintenance, and small footprint.

[0060] like Figure 3 As shown in the figure, a magnetically enhanced electroadsorption method for chlorine extraction according to an embodiment of the present invention includes the following steps: Step S1, Preparation: Desulfurization wastewater is introduced into adsorption chamber 23, and magnetic electrode solution with a set flow rate is introduced into electrode channel 24. The part of electrode channel 24 located in the magnetic field gathers electrode particles in the magnetic electrode solution under the action of the magnetic field, so as to enhance the electron transport capacity of the magnetic electrode solution. Step S2, electro-adsorption: A constant working voltage is applied to the electro-adsorption component 2 by the DC regulated power supply 3. Under the action of the electric field force, the anions in the desulfurization wastewater are adsorbed onto the magnetic electrodes in the electrode channel 24 of the anode guide plate 21 to obtain an anion enrichment solution. The cations in the desulfurization wastewater are adsorbed onto the magnetic electrodes in the electrode channel 24 of the cathode guide plate 22 to obtain a cation enrichment solution. The anions include chloride ions. Step S3: Drainage. The desulfurization wastewater after chlorination is discharged from the adsorption chamber 23, and the anion enrichment solution and cation enrichment solution flow out of the electrode channel 24.

[0061] The technical advantages of the magnetically enhanced electroadsorption chlorine extraction method according to the embodiments of the present invention are the same as those of the magnetically enhanced electroadsorption chlorine extraction device described above, and will not be repeated here.

[0062] In some embodiments, in step S2, monovalent anions migrate through the monovalent anion exchange membrane 25 to the electrode channel 24 of the anode guide plate 21, and cations migrate through the cation exchange membrane 26 to the electrode channel 24 of the cathode guide plate 22.

[0063] like Figure 3 As shown, in some embodiments, after step S3, the chlorine removal method further includes: Step S4, analysis and regeneration: the anion enrichment solution and the cation enrichment solution are returned to the mixing tank 6 for mixing and regeneration through charge neutralization analysis to obtain concentrated brine and magnetic electrode solution. The concentrated brine is the supernatant in the mixing tank 6, and the magnetic electrode solution is the precipitate in the mixing tank 6.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A magnetic enhanced electro-adsorption chlorination device, characterized in that, The application relates to a chlorine extraction device. The device comprises a shell and an electro-sorption assembly, the shell has a containing cavity, the electro-sorption assembly is arranged in the containing cavity and comprises anode flow guide plates and cathode flow guide plates, the anode flow guide plates and the cathode flow guide plates are arranged in a first direction, the anode flow guide plates, the cathode flow guide plates and the inner wall surface of the containing cavity jointly define a sorption chamber suitable for introducing desulfurization wastewater, each of the anode flow guide plates and the cathode flow guide plates is provided with an electrode channel on the side facing the sorption chamber, the electrode channel is suitable for introducing a magnetic electrode solution; a direct-current stabilized power supply, a positive electrode of the direct-current stabilized power supply is electrically connected with the anode flow guide plates, and a negative electrode of the direct-current stabilized power supply is electrically connected with the cathode flow guide plates; The chlorine extraction device has a magnetic field, and at least part of the electrode channel is located in the magnetic field.

2. The magnetic field reinforced electro-adsorption chlorine extraction device according to claim 1, characterized in that, The electrode channel of at least one of the anode flow guide plates and the cathode flow guide plates is a spiral electrode channel; The anode flow guide plates and the cathode flow guide plates are both conductive metal plates.

3. The magnetic field reinforced electro-adsorption chlorine extraction device according to claim 1, characterized in that, The electro-sorption assembly further comprises monovalent anion exchange membranes and cation exchange membranes arranged in the sorption chamber, the side of the anode flow guide plates facing the sorption chamber is connected with the monovalent anion exchange membranes, and the side of the cathode flow guide plates facing the sorption chamber is connected with the cation exchange membranes; The monovalent anion exchange membranes and the cation exchange membranes are arranged in the first direction and define a desalination area in the sorption chamber, the shell is provided with a water inlet and a water outlet communicating with the desalination area, the water inlet is suitable for communicating with a desulfurization wastewater source to introduce the desulfurization wastewater into the desalination area.

4. The magnetic field intensified electro-adsorptive chlorine extraction device of claim 3, wherein, The anode flow guide plates and the cathode flow guide plates are both at least one and are alternately arranged in the first direction, and any anode flow guide plate, adjacent cathode flow guide plate and inner wall surface of the containing cavity jointly define the sorption chamber; The monovalent anion exchange membranes and the cation exchange membranes are both at least one and correspond to the sorption chamber one by one.

5. The magnetic field enhanced electro-adsorption chlorine extraction device of claim 3, wherein, The electro-sorption assembly further comprises an insulating piece, the insulating piece is located in the desalination area and is clamped between the monovalent anion exchange membranes and the cation exchange membranes, the insulating piece is provided with a through hole penetrating through the insulating piece in the first direction, the through hole corresponds to the electrode channel, and the water inlet, the through hole and the water outlet are sequentially communicated; In a projection plane perpendicular to the first direction, the projection outer contour of the electrode channel is located in the projection outer contour of the through hole.

6. The magnetic field intensified electro-adsorptive chlorination device according to any one of claims 1-5, wherein, The device further comprises a first magnet and a second magnet, the first magnet and the second magnet are separately arranged on the two sides of the shell in the first direction, and the first magnet and the second magnet form the magnetic field; The electrode channel of each of the anode flow guide plates and the cathode flow guide plates is completely located in the magnetic field.

7. The magnetic field intensified electro-adsorptive chlorination device of claim 6, wherein, The device further comprises a mixing box for containing the magnetic electrode solution, an outlet of the mixing box is communicated with the inlet of the electrode channel of each of the anode flow guide plates and the cathode flow guide plates, and an inlet of the mixing box is communicated with the outlet of the electrode channel of each of the anode flow guide plates and the cathode flow guide plates. The outlet of the mixing box is located below the inlet of the mixing box in the up-down direction; A first delivery pump is arranged between the outlet of the mixing box and the electrode passage inlet of the anode flow guide plate; A second delivery pump is arranged between the outlet of the mixing box and the electrode passage inlet of the cathode flow guide plate.

8. A method of magnetic enhanced electrosorption for chlorine extraction, characterized in that, The chlorine extraction method comprises the following steps: Preparation, desulfurization wastewater is introduced into the adsorption chamber, and a magnetic electrode solution with a set flow rate is introduced into the electrode passage, and the part of the electrode passage in the magnetic field is gathered under the action of the magnetic field to enhance the electron transport capacity of the magnetic electrode solution; Electro-adsorption, a constant working voltage is applied to the electro-adsorption assembly by a direct current stabilized power supply, under the action of the electric field force, anions in the desulfurization wastewater are adsorbed on the magnetic electrode in the electrode passage of the anode flow guide plate to obtain anion-rich liquid, and cations in the desulfurization wastewater are adsorbed on the magnetic electrode in the electrode passage of the cathode flow guide plate to obtain cation-rich liquid, wherein the anions include chloride ions; Drainage, the desulfurization wastewater after chlorine extraction is discharged from the adsorption chamber, and the anion-rich liquid and the cation-rich liquid flow out of the electrode passage.

9. The magnetic field intensified electro-adsorptive chlorination method according to claim 8, wherein, In the electro-adsorption operation, monovalent anions in the anions migrate to the electrode passage of the anode flow guide plate through a monovalent anion exchange membrane, and cations migrate to the electrode passage of the cathode flow guide plate through a cation exchange membrane.

10. The magnetic field intensified electro-adsorptive chlorination method according to claim 8 or 9, characterized in that, After the drainage operation, the chlorine extraction method further comprises: Analysis regeneration, the anion-rich liquid and the cation-rich liquid return to the mixing box and are mixed and analyzed for regeneration by charge neutralization, obtaining concentrated brine and magnetic electrode solution, the concentrated brine is supernatant in the mixing box, and the magnetic electrode solution is precipitate in the mixing box.

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