Heterogeneous magnetic Fenton sewage treatment device

Abstract

The utility model belongs to the technical field of sewage treatment, and discloses a heterogeneous magnetic Fenton sewage treatment device which comprises a reactor, a water distribution gas disc, a water inlet pump, a chemical inlet pump, a longitudinal partition plate, a catalyst, a magnetic pole plate, a time controller and a catalyst supporting net, and the reactor comprises a water inlet area, a heterogeneous magnetic Fenton oxidation area and a precipitation water outlet area which are sequentially distributed from bottom to top; a water inlet and a medicine inlet are formed in the side wall of the water inlet area, a water distribution steam disc is arranged in the water inlet area, the input end of the water distribution steam disc is communicated with a water inlet pump through the water inlet and is communicated with a medicine inlet pump through the medicine inlet, and a plurality of longitudinal partition plates are vertically arranged in the out-of-phase magnetic Fenton oxidation area at intervals so as to divide the inside of the out-of-phase magnetic Fenton oxidation area into a plurality of reaction areas; a catalyst is put into each reaction area, magnetic pole plates are annularly arranged on the outer wall of the out-phase magnetic Fenton oxidation area, and each magnetic pole plate is electrically connected with the time controller; the sediment water outlet area is provided with an exhaust port and a water outlet; the catalyst supporting net is used for separating the water inlet area from the out-phase magnetic Fenton oxidation area.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a kind of heterogeneous magnetic fenton sewage treatment devices. BACKGROUND

[0002] With the rapid development of industry, the problem of industrial wastewater treatment is increasingly prominent, and traditional biodegradation cannot handle the refractory organic matter therein, while advanced oxidation technology can directly mineralize pollutants or improve their biodegradability through chemical oxidation.

[0003] Traditional fenton method utilizes ferrous sulfate and hydrogen peroxide to react in water to generate strong oxidizing hydroxyl radicals to degrade pollutants, and becomes a commonly used advanced oxidation technology due to its strong oxidation ability and high treatment efficiency. However, this method has the problem of low hydrogen peroxide utilization efficiency, and requires continuous addition of iron salt and hydrogen peroxide, resulting in high reagent cost, and generating a large amount of iron sludge, which needs to be treated additionally, increasing the application cost.

[0004] To make up for the defects of traditional fenton method, new fenton process emerges as the times require. Among them, heterogeneous fenton method uses iron-based solid catalyst, reduces the consumption of ferrous sulfate, saves reagent cost, can react in a wide pH range, reduces the use of acid and alkali reagents and the generation of iron sludge, and has good development prospect, but its treatment efficiency is difficult to surpass that of traditional fenton method; and magnetic fenton method changes the arrangement order of water molecules around pollutants by applying an external magnetic field, so that hydroxyl radicals are more likely to react with pollutant molecules, improving the treatment efficiency and reducing hydrogen peroxide consumption, but the current magnetic fenton method still uses ferrous sulfate, and has not got rid of the limitations of traditional fenton method.

[0005] Therefore, it is urgent to provide a heterogeneous magnetic fenton sewage treatment device to solve the above problems. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a heterogeneous magnetic fenton sewage treatment device to improve the sewage treatment efficiency, reduce reagent consumption and iron sludge precipitation, and reduce the treatment cost.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A heterogeneous magnetic fenton sewage treatment device, comprising a reactor, a water distribution air disc, a water inlet pump, a reagent inlet pump, a longitudinal partition plate, a catalyst, a magnetic pole plate, a time controller and a catalyst support net, the reactor comprises a water inlet area, a heterogeneous magnetic fenton oxidation area and a sedimentation effluent area distributed in turn from bottom to top;

[0009] The side wall of the water inlet area is provided with a water inlet and a reagent inlet, the water distribution air disc is arranged in the water inlet area, the water inlet pump is communicated with the input end of the water distribution air disc through the water inlet, and the reagent inlet pump is communicated with the input end of the water distribution air disc through the reagent inlet;

[0010] Multiple longitudinal partitions are spaced apart and erected in the heterogeneous magnetic Fenton oxidation zone to divide the interior of the heterogeneous magnetic Fenton oxidation zone into multiple reaction zones. The catalyst is placed in each reaction zone. Multiple magnetic pole plates are arranged around the outer wall of the heterogeneous magnetic Fenton oxidation zone, and multiple magnetic pole plates are electrically connected to the time controller.

[0011] The sedimentation outlet area is equipped with an exhaust port and a water outlet;

[0012] The catalyst support mesh is used to separate the water inlet zone and the heterogeneous magnetic Fenton oxidation zone.

[0013] Furthermore, the heterogeneous magnetic Fenton wastewater treatment device also includes a reflux pump. The sidewall of the heterogeneous magnetic Fenton oxidation zone is provided with a reflux port, which is located above the magnetic pole plate. The reflux pump is disposed between the reflux port and the output end of the inlet pump.

[0014] Furthermore, the lower end of the heterogeneous magnetic Fenton oxidation zone is provided with an upper interface, the upper end of the water inlet zone is provided with a lower interface, the upper interface and the lower interface are detachably connected, and the catalyst support mesh is sandwiched between the upper interface and the lower interface.

[0015] Furthermore, a sealing gasket is provided between the catalyst support mesh and both the upper and lower interfaces.

[0016] Furthermore, the magnetic pole plate and the longitudinal partition plate are at the same height and are positioned correspondingly.

[0017] Furthermore, each of the longitudinal partitions is bonded vertically to the inner wall of the heterogeneous magnetic Fenton oxidation zone.

[0018] Furthermore, the height ratio of the longitudinal diaphragm to the heterogeneous magnetic Fenton oxidation region is 4 / 7 to 5 / 7; and / or,

[0019] The magnetic field strength generated by the magnetic pole plate is 40mT to 80mT.

[0020] Furthermore, the reactor is made of fiberglass; and / or,

[0021] The longitudinal partition is made of fiberglass; and / or,

[0022] The catalyst is pyrite slag.

[0023] Furthermore, the reactor is cylindrical, the volume of the inlet zone is denoted as V1, the volume of the heterogeneous magnetic Fenton oxidation zone is denoted as V2, and the volume of the sedimentation outlet zone is denoted as V3, where V2>V3>V1.

[0024] Furthermore, the particle size of the catalyst is 1 mm to 3 mm, and the pore size of the catalyst support mesh is 0.5 mm to 0.8 mm.

[0025] The beneficial effects of this utility model are:

[0026] This utility model provides a heterogeneous magnetic Fenton wastewater treatment device, including a reactor, a water distribution plate, an inlet pump, a chemical inlet pump, longitudinal baffles, a catalyst, magnetic pole plates, a time controller, and a catalyst support mesh. The reactor includes an inlet zone, a heterogeneous magnetic Fenton oxidation zone, and a sedimentation effluent zone, distributed sequentially from bottom to top. The inlet zone has an inlet and a chemical inlet on its side wall. A water distribution plate is located within the inlet zone. The inlet pump is connected to the input end of the water distribution plate through the inlet, and the chemical inlet pump is connected to the input end of the water distribution plate through the chemical inlet. The water distribution plate can discharge water upwards, allowing wastewater and chemicals to flow upwards and promoting thorough mixing of wastewater and chemicals, thereby increasing the reaction rate. Multiple longitudinal baffles are also included. The reactor is positioned at intervals within the heterogeneous magnetic Fenton oxidation zone to divide the interior of the zone into multiple reaction areas. Each reaction area contains a catalyst. Magnetic pole plates are arranged around the outer wall of the heterogeneous magnetic Fenton oxidation zone, and each magnetic pole plate is electrically connected to a timer. The sedimentation effluent zone is equipped with an exhaust port and an outlet. The mixed gas accumulated in the sedimentation effluent zone can be discharged from the reactor through the exhaust port, and the wastewater is discharged from the reactor through the outlet after reacting in the heterogeneous magnetic Fenton oxidation zone. The catalyst support net is used to separate the inlet zone and the heterogeneous magnetic Fenton oxidation zone to isolate the catalyst in the heterogeneous magnetic Fenton oxidation zone and prevent the catalyst from entering the inlet zone and clogging the outlet of the water distribution plate. The heterogeneous magnetic Fenton oxidation zone is divided into multiple reaction areas by multiple longitudinal partitions, allowing the catalyst to be dispersed in each reaction area. The energization of the magnetic pole plates is controlled by a time controller, thereby changing the magnetic field distribution and ensuring uniform distribution of the catalyst within the reaction area. This solves the problem of easy aggregation of magnetic catalysts used in heterogeneous Fenton oxidation under the action of a magnetic field, and realizes the coupling of heterogeneous Fenton and magnetic Fenton oxidation. It can reuse Fenton catalysts, treat wastewater over a wide pH range, reduce the use of ferrous sulfate and acid-base reagents, and improve the utilization rate of hydrogen peroxide by providing a magnetic field, reducing hydrogen peroxide loss and increasing the degradation rate. This improves wastewater treatment efficiency, reduces reagent consumption and iron sludge precipitation, and lowers treatment costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the heterogeneous magnetic Fenton wastewater treatment device of this utility model;

[0028] Figure 2 This is a top view of the heterogeneous magnetic Fenton wastewater treatment device of this utility model.

[0029] In the picture:

[0030] 1. Reactor; 2. Water distribution plate; 3. Inlet pump; 4. Chemical feed pump; 5. Separator; 6. Catalyst; 7. Magnetic plate; 8. Time controller; 9. Catalyst support mesh; 10. Inlet; 11. Chemical feed; 12. Exhaust port; 13. Outlet; 14. Reflux pump; 15. Reflux port; 16. Upper inlet; 17. Lower inlet; 18. Effluent weir;

[0031] I. Inlet water zone; II. Heterogeneous magnetic Fenton oxidation zone; III. Sedimentation outlet water zone. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 andFigure 2 As shown, this utility model provides a heterogeneous magnetic Fenton wastewater treatment device, including a reactor 1, a water distribution plate 2, an inlet pump 3, a chemical inlet pump 4, longitudinal baffles 5, a catalyst 6, magnetic pole plates 7, a time controller 8, and a catalyst support mesh 9. The reactor 1 includes an inlet zone I, a heterogeneous magnetic Fenton oxidation zone II, and a sedimentation effluent zone III, distributed sequentially from bottom to top. The side wall of the inlet zone I is provided with an inlet 10 and a chemical inlet 11. The water distribution plate 2 is provided in the inlet zone I. The inlet pump 3 is connected to the input end of the water distribution plate 2 through the inlet 10, and the chemical inlet pump 4 is connected to the input end of the water distribution plate 2 through the chemical inlet 11. The water distribution plate 2 can discharge water upwards, so that the wastewater and the chemical agent flow upwards and promote the full mixing of wastewater and chemical agent, thereby improving the reaction rate. Multiple longitudinal baffles are provided. 5 are spaced apart in the heterogeneous magnetic Fenton oxidation zone II to divide the interior of the heterogeneous magnetic Fenton oxidation zone II into multiple reaction zones. Each reaction zone contains a catalyst 6. Magnetic pole plates 7 are arranged around the outer wall of the heterogeneous magnetic Fenton oxidation zone II, and each magnetic pole plate 7 is electrically connected to the time controller 8. The sedimentation effluent zone III is provided with an exhaust port 12 and an outlet 13. The mixed gas accumulated in the sedimentation effluent zone III can be discharged from the reactor 1 through the exhaust port 12. The wastewater is discharged from the reactor 1 through the outlet 13 after being reacted in the heterogeneous magnetic Fenton oxidation zone II. The catalyst support net 9 is used to separate the inlet zone I and the heterogeneous magnetic Fenton oxidation zone II to isolate the catalyst 6 in the heterogeneous magnetic Fenton oxidation zone II and prevent the catalyst 6 from entering the inlet zone I and clogging the outlet 13 of the water distribution plate 2.

[0037] Multiple longitudinal partitions 5 divide the interior of the heterogeneous magnetic Fenton oxidation zone II into multiple reaction zones, allowing the catalyst 6 to be dispersed in each reaction zone. The energization of the magnetic pole plate 7 is controlled by a time controller 8, thereby altering the magnetic field distribution and ensuring uniform distribution of the catalyst 6 within the reaction zone. This solves the problem of easy aggregation of the magnetic catalyst 6 used in heterogeneous Fenton oxidation under magnetic field conditions, achieving coupling between heterogeneous and magnetic Fenton oxidation. This allows for the reuse of the Fenton catalyst 6, treating wastewater over a wider pH range, reducing the use of ferrous sulfate and acid / base reagents. Furthermore, the magnetic field improves the utilization rate of hydrogen peroxide, reduces its loss, and increases the degradation rate, thereby improving wastewater treatment efficiency, reducing reagent consumption and iron sludge precipitation, and lowering treatment costs.

[0038] Furthermore, the heterogeneous magnetic Fenton wastewater treatment device also includes a reflux pump 14. A reflux port 15 is provided on the side wall of the heterogeneous magnetic Fenton oxidation zone II. The reflux port 15 is located above the magnetic pole plate 7. The reflux pump 14 is set between the reflux port 15 and the output end of the influent pump 3, which allows the unreacted wastewater and reagents to re-enter the reaction zone through the influent pump 3, increasing the reaction time and contact opportunities, thereby improving the decomposition effect on recalcitrant organic matter and ensuring the quality of wastewater treatment.

[0039] like Figure 1As shown, in this embodiment, the lower end of the heterogeneous magnetic Fenton oxidation zone II is provided with an upper interface 16, and the upper end of the water inlet zone I is provided with a lower interface 17. The upper interface 16 and the lower interface 17 are detachably connected. The catalyst support net 9 is sandwiched between the upper interface 16 and the lower interface 17, which facilitates the disassembly of the reactor 1 to replace the catalyst 6 and the catalyst support net 9.

[0040] Specifically, the upper interface 16 and the lower interface 17 are each provided with threaded through holes, and screws and nuts are used to connect and fix the upper interface 16 and the lower interface 17, which facilitates assembly and disassembly. Optionally, the upper interface 16 and the lower interface 17 may be connected by means of snap-fit ​​or plug-in, etc., which are not limited here.

[0041] Furthermore, sealing gaskets are provided between the catalyst support mesh 9 and both the upper interface 16 and the lower interface 17 to improve the airtightness of the connection and prevent leakage from the reactor 1. The sealing gaskets are made of fluororubber, which has good corrosion resistance and can avoid being corroded by reagents and wastewater, thus ensuring sealing. Optionally, the sealing gaskets can also be made of other corrosion-resistant materials, such as polytetrafluoroethylene (PTFE) or ethylene propylene diene monomer (EPDM), etc., without limitation.

[0042] In this embodiment, the magnetic pole plate 7 and the longitudinal partition plate 5 are at the same height and corresponding in position. They are used to generate N and S magnetic poles in the reaction area formed by the separation of the longitudinal partition plate 5, provide a magnetic field to magnetize the sewage in the reactor 1, and control the energization of each magnetic pole plate 7 by the time controller 8, thereby changing the magnetic field distribution in the reactor 1. By setting the longitudinal partition plate 5 and the magnetic pole plate 7 electrically connected to the time controller 8, the uniform distribution of the catalyst 6 is controlled in a coordinated manner, thereby preventing the aggregation of the catalyst 6.

[0043] Furthermore, each longitudinal partition 5 is bonded vertically to the inner wall of the heterogeneous magnetic Fenton oxidation zone II. The longitudinal partitions 5 are distributed vertically, which can reduce the obstruction of the water flow from bottom to top caused by the longitudinal partitions 5, which is beneficial to ensuring the reaction efficiency. The bonding method can avoid affecting the sealing of the reactor 1 and is easy to operate.

[0044] Specifically, the longitudinal partition 5 is bonded to the inner wall of the heterogeneous magnetic Fenton oxidation zone II using a corrosion-resistant adhesive to prevent corrosion by chemicals and wastewater, thus ensuring the connection strength. In this embodiment, Teflon adhesive is used as the adhesive due to its excellent corrosion resistance. Of course, in other embodiments, epoxy adhesives or phenolic adhesives may also be used, and this is not a limitation.

[0045] Furthermore, the height ratio of the longitudinal baffle 5 to the heterogeneous magnetic Fenton oxidation zone II is 4 / 7 to 5 / 7. The upper region of the heterogeneous magnetic Fenton oxidation zone II can serve as a buffer zone for the catalyst 6 and wastewater, facilitating the fall of the catalyst 6 and preventing it from flowing out with the water, thus reducing catalyst loss. Additionally, the return water inlet is located above the longitudinal baffle 5, allowing unreacted wastewater and reagents to re-enter the reaction zone via the inlet pump 3, thereby ensuring the wastewater treatment effect. In this embodiment, the height ratio of the longitudinal baffle 5 to the heterogeneous magnetic Fenton oxidation zone II is 2:3. In other embodiments, the height ratio of the longitudinal baffle 5 to the heterogeneous magnetic Fenton oxidation zone II can also be 4:7, 5:8, 5:7, etc., and is not limited here.

[0046] Furthermore, the number of longitudinal baffles 5 is four to six, which is beneficial to improving the dispersion of catalyst 6 without affecting the water flow rate. Depending on the size of reactor 1 and the treatment requirements, the number of longitudinal baffles 5 can be four, five, or six, etc., and is not limited here.

[0047] In addition, the magnetic field strength generated by the magnetic pole plate 7 is 40mT to 80mT, which can improve the reaction rate and avoid excessive force on the catalyst 6, which would cause the catalyst 6 to aggregate or collide.

[0048] Specifically, the number of magnetic pole plates 7 is six to ten, which can generate a more complex, uniformly distributed, and widespread magnetic field. These magnetic fields interact to comprehensively change the arrangement of water molecules around pollutants, making it easier for hydroxyl radicals to contact pollutant molecules, thereby enhancing the oxidative decomposition efficiency of recalcitrant organic matter in industrial wastewater and accelerating the degradation rate. Depending on the size of reactor 1, the number of magnetic pole plates 7 can be set to six, seven, eight, or ten, etc., and is not limited here.

[0049] Furthermore, reactor 1 and / or partition 5 are made of fiberglass, which is corrosion-resistant and non-magnetic, and can meet the coupling requirements of heterogeneous Fenton and magnetic Fenton. Optionally, reactor 1 and partition 5 can also be made of ceramic materials or polyvinyl chloride, etc., which are not limited here.

[0050] In this embodiment, catalyst 6 is pyrite slag, which contains a variety of iron-containing minerals and other metal oxides. Compared with other single iron-containing minerals, it has better catalytic performance. As catalyst 6, it has strong catalytic activity for the decomposition of hydrogen peroxide to generate hydroxyl radicals. Moreover, pyrite slag is a chemical waste residue, which is low in cost, easy to obtain, and environmentally friendly.

[0051] Furthermore, reactor 1 is cylindrical. The volume of inlet zone I is denoted as V1, the volume of heterogeneous magnetic Fenton oxidation zone II is denoted as V2, and the volume of sedimentation effluent zone III is denoted as V3, where V2>V3>V1. Wastewater enters heterogeneous magnetic Fenton oxidation zone II from inlet zone I, and after reaction, it is discharged from sedimentation effluent zone III. The layout design of V2>V3>V1 is reasonable, which can ensure that the wastewater has sufficient reaction space and reaction time, avoid overloading reactor 1, and ensure the wastewater treatment effect.

[0052] In this embodiment, V1:V2:V3 = 1:8:4. Of course, in other embodiments, the volume ratio of V1, V2, and V3 can be adaptively set according to factors such as wastewater treatment requirements and the amount of catalyst 6 used, and is not limited here.

[0053] In addition, in this embodiment, the particle size of catalyst 6 is 1mm to 3mm, which can ensure sufficient contact with sewage and prevent particles that are too small from being discharged with the water flow, thus reducing the cost of using catalyst 6; the pore size of catalyst support mesh 9 is 0.5mm to 0.8mm, which can prevent catalyst 6 particles from entering the water inlet zone I and does not affect the sewage entering the heterogeneous magnetic Fenton oxidation zone II.

[0054] In some optional embodiments, a weir 18 is provided on the side of the sedimentation effluent zone III, and an outlet 13 is provided on the weir 18. The weir 18 is provided to improve the stability of the effluent flow.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heterogeneous magnetic Fenton wastewater treatment device, characterized in that, The reactor (1) includes a water distribution plate (2), a water inlet pump (3), a chemical inlet pump (4), a longitudinal partition plate (5), a catalyst (6), a magnetic pole plate (7), a time controller (8), and a catalyst support mesh (9). The reactor (1) includes an inlet zone (Ⅰ), a heterogeneous magnetic Fenton oxidation zone (Ⅱ), and a sedimentation outlet zone (Ⅲ) distributed from bottom to top. The side wall of the water inlet area (I) is provided with a water inlet (10) and a medicine inlet (11). The water inlet area (I) is provided with the water distribution air plate (2). The water pump (3) is connected to the input end of the water distribution air plate (2) through the water inlet (10). The medicine pump (4) is connected to the input end of the water distribution air plate (2) through the medicine inlet (11). Multiple longitudinal partitions (5) are spaced apart and erected in the heterogeneous magnetic Fenton oxidation zone (II) to divide the interior of the heterogeneous magnetic Fenton oxidation zone (II) into multiple reaction zones. Each reaction zone contains the catalyst (6). Multiple magnetic pole plates (7) are arranged around the outer wall of the heterogeneous magnetic Fenton oxidation zone (II), and multiple magnetic pole plates (7) are electrically connected to the time controller (8). The sedimentation outlet zone (Ⅲ) is equipped with an exhaust port (12) and an outlet (13); The catalyst support mesh (9) is used to separate the water inlet zone (Ⅰ) and the heterogeneous magnetic Fenton oxidation zone (Ⅱ).

2. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The heterogeneous magnetic Fenton wastewater treatment device also includes a reflux pump (14). The side wall of the heterogeneous magnetic Fenton oxidation zone (II) is provided with a reflux port (15). The reflux port (15) is located above the magnetic pole plate (7). The reflux pump (14) is located between the reflux port (15) and the output end of the inlet pump (3).

3. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The lower end of the heterogeneous magnetic Fenton oxidation zone (II) is provided with an upper interface (16), and the upper end of the water inlet zone (I) is provided with a lower interface (17). The upper interface (16) and the lower interface (17) are detachably connected, and the catalyst support net (9) is sandwiched between the upper interface (16) and the lower interface (17).

4. The heterogeneous magnetic Fenton wastewater treatment device according to claim 3, characterized in that, The catalyst support mesh (9) is provided with sealing gaskets between the upper interface (16) and the lower interface (17).

5. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The magnetic pole plate (7) is at the same height as the longitudinal partition plate (5) and their positions correspond.

6. The heterogeneous magnetic Fenton wastewater treatment device according to claim 5, characterized in that, Each of the longitudinal partitions (5) is bonded vertically to the inner wall of the heterogeneous magnetic Fenton oxidation zone (II).

7. The heterogeneous magnetic Fenton wastewater treatment device according to any one of claims 1 to 6, characterized in that, The height ratio of the longitudinal partition (5) to the heterogeneous magnetic Fenton oxidation zone (II) is 4 / 7 to 5 / 7; and / or, The magnetic field strength generated by the magnetic pole plate (7) is 40mT to 80mT.

8. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The reactor (1) is made of fiberglass; and / or, The longitudinal partition (5) is made of fiberglass; and / or, The catalyst (6) is pyrite slag.

9. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The reactor (1) is cylindrical. The volume of the inlet zone (Ⅰ) is denoted as V1, the volume of the heterogeneous magnetic Fenton oxidation zone (Ⅱ) is denoted as V2, and the volume of the sedimentation outlet zone (Ⅲ) is denoted as V3, where V2>V3>V1.

10. The heterogeneous magnetic Fenton wastewater treatment device according to claim 1, characterized in that, The catalyst (6) has a particle size of 1 mm to 3 mm, and the catalyst support mesh (9) has a pore size of 0.5 mm to 0.8 mm.

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