A multi-stage electro-Fenton sewage treatment device

Abstract

The utility model relates to a multi-stage electro-Fenton sewage treatment device, which belongs to the technical field of sewage treatment, and comprises a base, wherein the upper end of the base is fixedly connected with a treatment frame, wherein the treatment frame is provided with a sewage treatment tank, wherein a mixing structure is provided in the sewage treatment tank; wherein the mixing structure comprises an aeration box, a dual-axis motor, a stirring shaft and a stirring blade. The multi-stage electro-Fenton sewage treatment device has the advantages of applying current between anode baffles and cathode baffles in coordination with a DC power supply controller, converting organic matter in sewage into easily treatable substances through electrochemical reactions, monitoring and adjusting the pH value of wastewater in the water inlet area through a pH detector in coordination with a pH controller, and fully mixing and reacting the gas in the gas storage tank with the wastewater through a mixing structure provided at the bottom of the anode baffles and the cathode baffles, thereby enhancing the treatment efficiency of the multi-stage electro-Fenton sewage treatment device.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a multi-stage electro-Fenton sewage treatment device. Background Art

[0002] The multi-stage electro-Fenton wastewater treatment unit is an advanced industrial wastewater treatment technology that combines electrochemical treatment and Fenton oxidation processes to effectively remove organic matter, pollutants and color from wastewater. This unit is typically used in environments that have high requirements for wastewater treatment, such as the chemical, pharmaceutical, food processing and textile industries.

[0003] In the electro-Fenton process, electrochemical methods (such as electrocatalysis, electrolysis, etc.) are first used to destroy organic matter and pollutants. This process involves applying an electric current between the anode and the cathode to convert the organic matter in the sewage into substances that are easy to treat through electrochemical reactions.

[0004] Subsequently, the sewage enters the Fenton reaction stage, in which the reaction of hydrogen peroxide and ferrous ions is used to produce hydroxyl radicals with high oxidizing power, which can effectively oxidize and decompose organic pollutants and color in the sewage.

[0005] In order to improve treatment efficiency and effectiveness, the multi-stage electro-Fenton sewage treatment device connects electrochemical treatment and Fenton oxidation processes in series, gradually reducing the pollutant concentration of sewage through multiple treatment stages. Each stage can perform in-depth treatment on specific pollutants to ensure that the final discharged water quality meets relevant environmental protection standards.

[0006] Most of the multi-stage electro-Fenton sewage treatment devices on the market will add hydrogen peroxide and ferrous ions into the sewage to react and produce hydroxyl free radicals with high oxidation ability. These free radicals can effectively oxidize and decompose organic pollutants and color in the sewage. However, the efficiency of transporting the gas to the sewage treatment tank through only one pipeline is low, so the multi-stage electro-Fenton sewage treatment device needs to be improved. Utility Model Content

[0007] In view of the deficiencies in the prior art, the utility model provides a multi-stage electro-Fenton sewage treatment device, which has the advantages of enhancing the treatment efficiency of the multi-stage electro-Fenton sewage treatment device and solves the problem that the multi-stage electro-Fenton sewage treatment device needs to be improved.

[0008] To achieve the above objectives, the utility model provides the following technical solutions: a multi-stage electro-Fenton sewage treatment device, comprising a base, a treatment frame fixedly connected to the upper end of the base, a sewage treatment tank arranged on the treatment frame, and a mixing structure arranged in the sewage treatment tank.

[0009] The mixing structure includes an aeration box, a dual-shaft motor, a stirring shaft and stirring blades. The aeration box is arranged on the bottom wall of the sewage treatment tank, the dual-shaft motor is fixedly connected in the aeration box, the output ends of the dual-shaft motor are directed to the left and right sides, the stirring shaft is fixedly connected to the output ends of the dual-shaft motor, and the stirring blades are fixedly connected to the outside of the stirring shaft.

[0010] Furthermore, a partition is fixedly connected to the processing rack, a DC power supply controller is fixedly connected to the middle of the upper end of the partition, a pH controller is fixedly connected to the left side of the upper end of the partition, and a gas storage tank is fixedly connected to the right side of the upper end of the partition.

[0011] Furthermore, a pH detector is fixedly connected to the inner wall of the sewage treatment pool, and an air inlet pipe is connected to the front of the gas storage tank.

[0012] Wherein, the pH detector and the pH controller are electrically connected.

[0013] It should be noted that there are three air inlet pipes, and the lower ends of the air inlet pipes are all connected to the aeration box.

[0014] Furthermore, one side of the gas storage tank is connected to a gas delivery pipe, and one end of the gas delivery pipe is connected to the gas storage box.

[0015] Among them, gases such as hydrogen peroxide and ferrous ions are stored in the gas storage box.

[0016] Furthermore, a limit frame is fixedly connected inside the aeration box, and the dual-axis motor is fixedly connected to the limit frame.

[0017] Among them, the limit frame is used to prevent sewage from flowing onto the housing of the dual-axis motor and corroding it.

[0018] Furthermore, aeration nets are provided on the upper end and the lower end of the aeration box.

[0019] Furthermore, an anode baffle is fixedly connected to the outer side of the sewage treatment tank, and a cathode baffle is fixedly connected to the inner side of the sewage treatment tank.

[0020] There are two anode baffles and two cathode baffles.

[0021] It should be noted that filter holes are provided inside the anode baffle, cathode baffle and aeration net.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] The multi-stage electro-Fenton sewage treatment device has the advantages of applying current between the anode baffle and the cathode baffle through a DC power supply controller to convert organic matter in sewage into easily treatable substances through electrochemical reactions, monitoring and adjusting the pH value of wastewater in the inlet area through a pH detector and a pH controller, and fully mixing and reacting the gas in the gas storage tank with the wastewater through a mixing structure arranged at the bottom of the anode baffle and the cathode baffle, thereby enhancing the treatment efficiency of the multi-stage electro-Fenton sewage treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a three-dimensional diagram of the aeration box structure of the utility model;

[0026] Figure 3 It is a three-dimensional diagram of the structure of the stirring shaft and stirring blade of the utility model.

[0027] In the figure: 1. base; 2. treatment rack; 3. sewage treatment tank; 4. water inlet pipe; 5. water outlet pipe; 6. DC power supply controller; 7. anode baffle; 8. cathode baffle; 9. pH controller; 10. pH detector; 11. gas storage tank; 12. air inlet pipe; 13. aeration box; 14. dual-axis motor; 15. stirring shaft; 16. stirring blades; 17. aeration net; 18. limit frame. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-3 A multi-stage electro-Fenton sewage treatment device in this embodiment includes a base 1, a treatment frame 2 is fixedly connected to the upper end of the base 1, a sewage treatment tank 3 is arranged on the treatment frame 2, and a mixing structure is arranged in the sewage treatment tank 3.

[0030] The mixing structure includes an aeration box 13, a dual-axis motor 14, a stirring shaft 15 and a stirring blade 16. The aeration box 13 is arranged on the bottom wall of the sewage treatment tank 3. The dual-axis motor 14 is fixedly connected in the aeration box 13. The output ends of the dual-axis motor 14 are directed to the left and right sides. The stirring shaft 15 is fixedly connected to the output ends of the dual-axis motor 14. The stirring blade 16 is fixedly connected to the outside of the stirring shaft 15.

[0031] The stirring shaft 15 passes through the anode baffle plate 7 and the cathode baffle plate 8 .

[0032] In this embodiment, a partition is fixedly connected to the processing rack 2, a DC power supply controller 6 is fixedly connected to the middle of the upper end of the partition, a pH controller 9 is fixedly connected to the left side of the upper end of the partition, and a gas storage tank 11 is fixedly connected to the right side of the upper end of the partition.

[0033] In this embodiment, a pH detector 10 is fixedly connected to the inner wall of the sewage treatment tank 3 , and an air inlet pipe 12 is connected to the front of the gas storage tank 11 .

[0034] The pH detector 10 and the pH controller 9 are electrically connected.

[0035] It should be noted that there are three air inlet pipes 12 , and the lower ends of the air inlet pipes 12 are all connected to the aeration box 13 .

[0036] In this embodiment, one side of the gas storage tank 11 is connected to a gas delivery pipe, and one end of the gas delivery pipe is connected to the gas storage box.

[0037] Among them, gases such as hydrogen peroxide and ferrous ions are stored in the gas storage box.

[0038] In this embodiment, a limit frame 18 is fixedly connected to the interior of the aeration box 13 , and the dual-axis motor 14 is fixedly connected to the limit frame 18 .

[0039] The limiting frame 18 is used to prevent sewage from flowing onto the housing of the dual-axis motor 14 and corroding it.

[0040] In this embodiment, an aeration net 17 is provided on both the upper end and the lower end of the aeration box 13 .

[0041] A connection hole is provided in the aeration box 13 , and the anode baffle plate 7 and the cathode baffle plate 8 are connected to the aeration box 13 through the connection hole.

[0042] In this embodiment, an anode baffle 7 is fixedly connected to the outer side of the sewage treatment tank 3 , and a cathode baffle 8 is fixedly connected to the inner side of the sewage treatment tank 3 .

[0043] There are two anode baffles 7 and two cathode baffles 7 .

[0044] It should be noted that filter holes are provided inside the anode baffle plate 7 , the cathode baffle plate 8 and the aeration net 17 .

[0045] It is understandable that the electro-Fenton technology is a new technology developed to overcome the shortcomings of the traditional Fenton method and improve the water treatment effect. The electro-Fenton method uses electrochemical methods to continuously generate Fe2+ and H2O2. After the two are generated, they immediately react to generate highly active hydroxyl radicals to degrade organic matter. Its essence is to directly generate Fenton reagents during the electrolysis process. The basic principle of the electro-Fenton reaction is that dissolved oxygen produces hydrogen peroxide through a two-electron oxygen reduction reaction on the surface of a suitable cathode material, O2+2H++2e-→H2O2. The generated H2O2 can react with the Fe2+ catalyst in the solution to produce a strong oxidant hydroxyl radical, H2O2+Fe2+→Fe3++·OH+OH-. In the electro-Fenton system, since the catalytic Fe2+ can be effectively reduced through a variety of pathways, only a small amount of iron salt is required in the system. Among the currently commonly used electro-Fenton sewage treatment devices, the more common one is the single-stage intermittent static mixing type, which often requires a longer residence time for treatment. In addition, the effective treatment area of ​​the single-stage static device is concentrated near the cathode, which is not conducive to uniform mixing of wastewater, causes large electrode losses, and has limited treatment efficiency.

[0046] The working principle of the above embodiment is:

[0047] First, the sewage is discharged into the sewage treatment tank 3 through the water inlet pipe 4, and current is applied between the anode baffle 7 and the cathode baffle 8 through the DC power supply controller 6. Through the electrochemical reaction, the organic matter in the sewage is converted into a substance that is easy to treat. The pH detector 10 is used in conjunction with the pH controller 9. The pH controller 9 is provided with a pH adjustment tank. After the pH adjustment tank is connected to the sewage treatment tank 3, it is used to monitor and adjust the pH value of the wastewater in the water inlet area.

[0048] Secondly, the gas in the gas storage tank is fully mixed with the wastewater through the mixing structure arranged at the bottom of the anode baffle 7 and the cathode baffle 8, and the gas is transported to the aeration box 13 through the gas storage tank 11 and the air inlet pipe 12.

[0049] Finally, the dual-axis motor 14 in the limit frame 18 drives the stirring shafts 15 on both sides to rotate, and the rotating stirring shafts 15 drive the stirring blades 16 to rotate together to mix the gas and sewage entering the aeration box 13. The sewage enters the aeration box 13 through the aeration net 17. At this time, the sewage can fully mix and react with the gas, thereby enhancing the treatment efficiency of the multi-stage electro-Fenton sewage treatment device and other advantages.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage electro-Fenton sewage treatment device, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to a processing frame (2), a sewage treatment tank (3) is arranged on the processing frame (2), and a mixing structure is arranged in the sewage treatment tank (3); The mixing structure comprises an aeration box (13), a dual-shaft motor (14), a stirring shaft (15) and a stirring blade (16); the aeration box (13) is arranged on the inner bottom wall of a sewage treatment tank (3); the dual-shaft motor (14) is fixedly connected in the aeration box (13); the output end of the dual-shaft motor (14) is oriented to the left and right sides; the stirring shaft (15) is fixedly connected to the output end of the dual-shaft motor (14); and the stirring blade (16) is fixedly connected to the outside of the stirring shaft (15).

2. A multi-stage electro-Fenton sewage treatment device according to claim 1, characterized in that: A partition is fixedly connected to the processing rack (2), a DC power supply controller (6) is fixedly connected to the middle of the upper end of the partition, a pH controller (9) is fixedly connected to the left side of the upper end of the partition, and a gas storage tank (11) is fixedly connected to the right side of the upper end of the partition.

3. A multi-stage electro-Fenton sewage treatment device according to claim 2, characterized in that: A pH detector (10) is fixedly connected to the inner wall of the sewage treatment tank (3), and an air inlet pipe (12) is connected to the front of the gas storage tank (11).

4. A multi-stage electro-Fenton sewage treatment device according to claim 2, characterized in that: One side of the gas storage tank (11) is connected to a gas delivery pipe, and one end of the gas delivery pipe is connected to a gas storage box.

5. A multi-stage electro-Fenton sewage treatment device according to claim 1, characterized in that: The aeration box (13) is fixedly connected to a limiting frame (18) inside, and the dual-axis motor (14) is fixedly connected to the limiting frame (18).

6. A multi-stage electro-Fenton sewage treatment device according to claim 1, characterized in that: Aeration nets (17) are provided on both the upper and lower ends of the aeration box (13).

7. A multi-stage electro-Fenton sewage treatment device according to claim 1, characterized in that: An anode baffle (7) is fixedly connected to the outside of the sewage treatment tank (3), and a cathode baffle (8) is fixedly connected to the inside of the sewage treatment tank (3).

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