Electro-catalysis type polluted underground water pumping treatment equipment

Abstract

The utility model relates to the technical field of underground water treatment, and particularly discloses electro-catalysis type polluted underground water extraction treatment equipment which comprises a mounting platform, a reaction tank is fixedly connected to one side of the top of the mounting platform, and an ion exchange membrane is fixedly connected to the middle of the inner wall of the reaction tank; through the arrangement of the reaction tank, the ion exchange membrane, the anode tube and the cathode tube, when the device is used, the water injection pipe at the top of the reaction tank is connected with the second pump body, polluted underground water is discharged into the reaction tank through the second water pumping pipe, and the tank body is divided into the anode chamber and the cathode chamber by the ion exchange membrane in the middle of the inner wall of the reaction tank; the insulation connecting plate is fixed to the tank top and connected with the anode tube and the cathode tube, the anode tube serves as an anode to generate hydroxyl free radical oxidation pollutants, the cathode tube serves as a cathode to complete a reduction reaction, and the ion exchange membrane ensures selective ion migration of the two chambers and prevents cross interference of products. Therefore, the effects of efficiently degrading pollutants, enhancing the mass transfer efficiency of a reaction system and preventing electrode passivation are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater treatment technology, specifically relating to an electrocatalytic groundwater extraction and treatment device. Background Technology

[0002] In the field of groundwater treatment technology, with the acceleration of industrialization and the increasingly severe environmental pollution problems, the treatment of polluted groundwater has become an urgent problem to be solved. Traditional groundwater treatment technologies mainly include physical, chemical and biological methods, but these methods have many limitations in terms of treatment efficiency, cost-effectiveness and environmental friendliness. In recent years, electrocatalysis technology has gradually become a research hotspot in the field of polluted groundwater treatment due to its advantages such as high efficiency, environmental protection and strong controllability.

[0003] Electrocatalysis technology utilizes an external electric field to trigger a series of redox reactions on the electrode surface, thereby degrading and removing pollutants. In the treatment of polluted groundwater, electrocatalysis can efficiently degrade different types of pollutants while avoiding secondary pollution. However, existing electrocatalytic groundwater treatment equipment still has certain shortcomings. Traditional electrocatalytic reaction devices often suffer from problems such as easy passivation of the electrode surface and low mass transfer efficiency, which seriously restricts the treatment efficiency and stability of electrocatalysis technology. Electrode passivation is mainly due to the accumulation of deposits or intermediate products generated during the reaction on the electrode surface, which leads to a decrease in electrode activity and thus affects the catalytic effect. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide an electrocatalytic groundwater extraction and treatment device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electrocatalytic groundwater extraction and treatment device includes:

[0007] Installation platform;

[0008] A reaction tank is fixedly connected to one side of the top of the installation platform, a water injection pipe is fixedly connected to the top of the reaction tank, and an ion exchange membrane is fixedly connected to the middle of the inner wall of the reaction tank.

[0009] An insulating connecting plate is fixedly connected to the inner bottom wall of the reaction vessel. An anode tube is fixedly connected to one side of the bottom of the insulating connecting plate, and a cathode tube is fixedly connected to the other side of the bottom of the insulating connecting plate. The anode tube and the cathode tube are respectively located on one side of the ion exchange membrane.

[0010] An assembly box is fixedly connected to the top of the reaction vessel. A first drive motor is fixedly connected to the inner wall of the assembly box. A drive rod is installed at the output end of the first drive motor. Two drive wheels are fixedly connected to the bottom end of the drive rod. A transmission belt is rotatably connected to the inner wall of each of the two drive wheels. A transmission wheel is rotatably connected to the inner wall of the transmission belt. A movable rod is fixedly connected to the bottom of the transmission wheel. Multiple sets of threaded mixing rods are fixedly connected to the surface of the movable rod.

[0011] Preferably, a first pump body is fixedly connected to the other side of the top of the installation platform, a first water pumping pipe is installed at the input end of the first pump body, a drain pipe is installed at the output end of the first pump body, and a filter tank is fixedly connected to the top of the installation platform on one side of the reaction tank, and the top end of the drain pipe is fixedly connected to the surface of the filter tank.

[0012] Preferably, a sealing cover is installed on the top of the filter tank, a protective box is fixedly connected to the top of the sealing cover, a second drive motor is fixedly connected to the inner wall of the protective box, a transmission rod is installed at the output end of the second drive motor, and a stirring rod is fixedly connected to the bottom end of the transmission rod.

[0013] Preferably, a coarse sand layer, an activated carbon layer, and a manganese sand layer are fixedly connected to the top of the surface of the stirring rod in sequence, and multiple sets of stirring blades are fixedly connected to the bottom of the surface of the stirring rod.

[0014] Preferably, an addition tube is fixedly connected to the surface of the filter tank, a one-way valve is installed on the inner wall of the addition tube, and a pH meter is fixedly connected to the addition tube near the inner wall of the filter tank.

[0015] Preferably, a second pump body is fixedly connected to the bottom of the installation platform. A second water pumping pipe is installed at the input end of the second pump body, and the output end of the second pump body is installed at the bottom end of the water injection pipe. Multiple sets of support rods are fixedly connected to the bottom of the installation platform, and casters are fixedly connected to the bottom ends of the support rods. Power distributors are fixedly connected to both sides of the top of the installation platform located on the first pump body. A control panel is fixedly connected to the top of the installation platform.

[0016] Preferably, a discharge pipe is fixedly connected to the bottom surface of the reaction vessel, and a solenoid valve is installed on the inner wall of the discharge pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) By setting up a reaction tank, ion exchange membrane, insulating connecting plate, anode tube, cathode tube and threaded mixing rod, when in use, the water injection pipe at the top of the reaction tank is connected to the second pump body, and the polluted groundwater is discharged into the reaction tank through the second pumping pipe. The ion exchange membrane in the middle of the inner wall of the reaction tank divides the tank into an anode chamber and a cathode chamber. The insulating connecting plate is fixed to the top of the tank and connected to the anode tube and cathode tube respectively. The anode tube acts as the anode to generate hydroxyl radicals to oxidize pollutants, and the cathode tube acts as the cathode to complete the reduction reaction. The ion exchange membrane ensures the selective migration of ions in the two chambers and prevents cross-interference of products. The assembly box at the top of the reaction tank has a built-in first drive motor, which drives the drive wheel to rotate through the drive rod. The drive wheel is linked to the transmission wheel through the transmission belt. The movable rod at the bottom of the transmission wheel drives multiple sets of threaded mixing rods to rotate in the reaction tank, so as to achieve full contact between the water and the electrode and prevent the concentration polarization of the electrode surface, thereby achieving the effects of efficient degradation of pollutants, enhancing the mass transfer efficiency of the reaction system, and preventing electrode passivation, and significantly improving the stability of the electrocatalytic treatment process and the pollutant removal rate.

[0019] (2) Through the setup of a filter tank, stirring rod, coarse sand layer, activated carbon layer, manganese sand layer, stirring blades, addition pipe, pH meter, discharge pipe, and solenoid valve, during use, the sealing cover at the top of the filter tank and the protective box form a sealed space. The second drive motor inside the protective box drives the stirring rod to rotate through the transmission rod. The coarse sand layer at the top of the stirring rod first intercepts large suspended particles, the activated carbon layer in the middle adsorbs dissolved organic matter, and the manganese sand layer at the bottom further removes heavy metal ions and catalytically oxidizes ferrous iron. At the same time, the stirring blades at the bottom of the stirring rod enhance the contact efficiency between the filter medium and water. The addition pipe, together with the pH meter, monitors and adjusts the inlet water in real time. The pH level is carefully controlled to ensure optimal conditions for the subsequent electrocatalytic reaction. The treated water is then discharged through a drain pipe, and the flow rate is precisely controlled by a solenoid valve. This achieves a three-stage deep treatment of polluted groundwater: physical filtration of the coarse sand layer to remove suspended solids, chemical adsorption of organic matter by activated carbon, and catalytic oxidation of heavy metals by the manganese sand layer. Combined with the oxidation-reduction reaction of the electrocatalytic reactor, a complete "pretreatment-deep treatment-precision control" treatment chain is formed. This not only significantly improves the removal efficiency of pollutants, but also enables convenient movement and automated operation of the equipment through modular design, ultimately achieving efficient, stable, and portable groundwater pollution control. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a perspective view of the filter tank of this utility model;

[0022] Figure 3 This is a perspective view of the ion exchange membrane of this utility model;

[0023] Figure 4This is a perspective view of the threaded hybrid rod of this utility model;

[0024] In the diagram: 1. Installation platform; 2. Reaction vessel; 3. Water injection pipe; 4. Ion exchange membrane; 5. Insulating connecting plate; 6. Anode tube; 7. Cathode tube; 8. Assembly box; 9. First drive motor; 10. Drive rod; 11. Drive wheel; 12. Transmission belt; 13. Transmission wheel; 14. Movable rod; 15. Threaded mixing rod; 16. First pump body; 17. First water suction pipe; 18. Drain pipe; 19. Filter tank; 20. Sealing cover; 21. Protective box; 22. Second drive motor; 23. Transmission rod; 24. Stirring rod; 25. Coarse sand layer; 26. Activated carbon layer; 27. Manganese sand layer; 28. Stirring blades; 29. ​​Addition pipe; 30. pH meter; 31. Second pump body; 32. Second water suction pipe; 33. Support rod; 34. Caster wheel; 35. Power distributor; 36. Control panel; 37. Discharge pipe; 38. Solenoid valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figures 1 to 4 As shown, an electrocatalytic groundwater extraction and treatment device includes: an installation platform 1, which serves as the overall support structure.

[0028] A reaction tank 2 is fixedly connected to one side of the top of the installation platform 1. A water injection pipe 3 is fixedly connected to the top of the reaction tank 2. The water injection pipe 3 at the top of the reaction tank 2 is connected to the second pump body 31, which discharges polluted groundwater into the interior of the reaction tank 2 through the second pumping pipe 32. An ion exchange membrane 4 is fixedly connected to the middle of the inner wall of the reaction tank 2. The ion exchange membrane 4 in the middle of the inner wall of the reaction tank 2 divides the tank into an anode chamber and a cathode chamber.

[0029] An insulating connecting plate 5 is fixedly connected to the inner bottom wall of the reaction vessel 2. An anode tube 6 is fixedly connected to one side of the bottom of the insulating connecting plate 5, and a cathode tube 7 is fixedly connected to the other side of the bottom of the insulating connecting plate 5. The anode tube 6 and the cathode tube 7 are respectively arranged on one side of the ion exchange membrane 4. The insulating connecting plate 5 is fixed to the top of the vessel and connects the anode tube 6 and the cathode tube 7 respectively. The anode tube 6 acts as the anode to generate hydroxyl radicals to oxidize pollutants, and the cathode tube 7 acts as the cathode to complete the reduction reaction. The ion exchange membrane 4 ensures the selective migration of ions in the two chambers and prevents cross-interference of products.

[0030] An assembly box 8 is fixedly connected to the top of the reaction vessel 2. A first drive motor 9 is fixedly connected to the inner wall of the assembly box 8. A drive rod 10 is installed at the output end of the first drive motor 9. Two drive wheels 11 are fixedly connected to the bottom end of the drive rod 10. A transmission belt 12 is rotatably connected to the inner wall of each of the two drive wheels 11. A transmission wheel 13 is rotatably connected to the inner wall of the transmission belt 12. A movable rod 14 is fixedly connected to the bottom of the transmission wheel 13. Multiple sets of threaded mixing rods 15 are fixedly connected to the surface of the movable rod 14. The first drive motor 9 is built into the assembly box 8 at the top of the reaction vessel 2. The drive rod 10 drives the drive wheel 11 to rotate. The drive wheel 11 is linked to the transmission wheel 13 through the transmission belt 12. The movable rod 14 at the bottom of the transmission wheel 13 drives the multiple sets of threaded mixing rods 15 to rotate inside the reaction vessel, so as to achieve full contact between the water and the electrode and prevent the concentration polarization of the electrode surface.

[0031] Example 2:

[0032] Please see Figures 1 to 4As shown, a first pump body 16 is fixedly connected to the other side of the top of the installation platform 1. A first water pumping pipe 17 is installed at the input end of the first pump body 16, and a drain pipe 18 is installed at the output end of the first pump body 16. A filter tank 19 is fixedly connected to the top of the installation platform 1 on one side of the reaction tank 2, and the top end of the drain pipe 18 is fixedly connected to the surface of the filter tank 19. The polluted groundwater is pumped out through the first water pumping pipe 17 by the first pump body 16 and transported to the filter tank 19 for pretreatment through the drain pipe 18. A sealing cover 20 is installed on the top of the filter tank 19, and a protective box 21 is fixedly connected to the top of the sealing cover 20. A second drive motor 22 is fixedly connected to the inner wall of the protective box 21. A transmission rod 23 is installed at the output end of the drive motor 22. A stirring rod 24 is fixedly connected to the bottom end of the transmission rod 23. A coarse sand layer 25, an activated carbon layer 26, and a manganese sand layer 27 are fixedly connected sequentially to the top surface of the stirring rod 24. Multiple sets of stirring blades 28 are fixedly connected to the bottom surface of the stirring rod 24. The sealing cover 20 at the top of the filter tank 19 and the protective box 21 form a sealed space. Inside the protective box 21, the second drive motor 22 drives the stirring rod 24 to rotate through the transmission rod 23. The coarse sand layer 25 at the top of the stirring rod 24 first intercepts large suspended particles, the activated carbon layer 26 in the middle adsorbs dissolved organic matter, and the manganese sand layer 27 at the bottom further removes heavy metal ions and catalyzes the oxidation of divalent metals. Iron is used, and the stirring blades 28 at the bottom of the stirring rod 24 enhance the contact efficiency between the filter medium and water. An addition pipe 29 is fixedly connected to the surface of the filter tank 19. A one-way valve is installed on the inner wall of the addition pipe 29. A pH meter 30 is fixedly connected to the addition pipe 29 near the inner wall of the filter tank 19. The addition pipe 29, in conjunction with the pH meter 30, monitors and adjusts the pH of the influent in real time to ensure the optimal pH conditions for the subsequent electrocatalytic reaction. A second pump body 31 is fixedly connected to the bottom of the installation platform 1. A second water pumping pipe 32 is installed at the input end of the second pump body 31, and the output end of the second pump body 31 is installed at the bottom end of the water injection pipe 3. The second pump body 31 transports the pretreated water through the second water pumping pipe 32. To the reaction tank 2, the bottom of the installation platform 1 is fixedly connected to multiple sets of support rods 33, and the bottom of the support rods 33 is fixedly connected to casters 34. The support rods 33 and casters 34 constitute the mobile base of the equipment. The top of the installation platform 1 is fixedly connected to both sides of the first pump body 16, and the power distributors 35 provide stable power to the entire system. The top of the installation platform 1 is fixedly connected to the control panel 36, which centrally controls the operating parameters of each unit. The bottom of the surface of the reaction tank 2 is fixedly connected to the discharge pipe 37, and the inner wall of the discharge pipe 37 is equipped with a solenoid valve 38. The water that has finally met the standards is discharged through the discharge pipe 37, and the solenoid valve 38 precisely controls the discharge flow.

[0033] Example 3:

[0034] Please see Figures 1 to 4As shown, a leak in an oil storage tank at a petrochemical plant has caused groundwater to be contaminated with petroleum hydrocarbons (benzene compounds, polycyclic aromatic hydrocarbons) and heavy metals (lead, cadmium), with the contamination depth reaching 15 meters. This threatens the safety of drinking water in the surrounding area, necessitating the rapid deployment of mobile treatment equipment to achieve efficient degradation of pollutants and discharge of water that meets quality standards.

[0035] The equipment is moved to the contaminated area by the casters 34, the support rod 33 is fixed in position, and the power distribution unit 35 is connected to the plant's power supply.

[0036] The first pump body 16 draws polluted groundwater from the monitoring well via the first pumping pipe 17, and the drain pipe 18 delivers it to the filter tank 19.

[0037] The coarse sand layer 25 intercepts suspended particles (such as rust and silt);

[0038] Activated carbon layer 26 adsorbs organic compounds such as benzene series (adsorption rate > 85%);

[0039] Manganese sand layer 27 catalytically oxidizes ferrous iron and retains lead and cadmium (removal rate > 90%).

[0040] The second drive motor 22 drives the stirring rod 24 to rotate, the stirring blade 28 enhances mass transfer, and the pH monitor 30 adds hydrochloric acid through the addition tube 29 to adjust the pH to 5.5.

[0041] The second pump 31 pumps the pretreated water into the reaction tank 2 through the water injection pipe 3, and the ion exchange membrane 4 separates the anode and cathode chambers.

[0042] The anode tube 6 (Ti / PbO2) generates hydroxyl radicals (·OH), which degrade residual organic matter (benzene degradation rate > 95%).

[0043] Cathode tube 7 (graphite) reduces heavy metal ions (Pb) 2+ →Pb precipitation);

[0044] The first drive motor 9 drives the threaded mixing rod 15 to rotate, preventing electrode passivation.

[0045] The treated water is discharged through the discharge pipe 37, and the flow rate is controlled by the solenoid valve 38. The water quality meets the Class III standard of the "Groundwater Quality Standard".

[0046] The control panel displays parameters such as pH and turbidity in real time, and operates automatically throughout the entire process.

[0047] Working principle: The first pump draws groundwater from the contaminated area through the first pumping pipe, and then transports it to the filter tank through the drainage pipe. The three-stage filtration layers work in sequence: the coarse sand layer (2-4mm quartz sand) intercepts suspended particles >50μm; the activated carbon layer (800mg / g iodine value) adsorbs dissolved organic matter; and the manganese sand layer (MnO2≥35%) catalyzes the oxidation of Fe. 2+ / Mn 2+ And it traps heavy metals.

[0048] The stirring system (second drive motor + stirring rod + blades) enhances filtration efficiency, and the pH monitor adjusts the acidity and alkalinity of the influent in real time.

[0049] The pretreated water is pumped into the reaction tank via the second pump body and separated into anode and cathode chambers by the ion exchange membrane.

[0050] Anode chamber: The Ti / PbO2 anode tube generates active oxygen species (·OH, E) through electrolysis at a voltage of 2-5V. 0 =2.8V), can degrade benzene series compounds and other recalcitrant organic compounds (k=10). 8 -10 10 M -1 s -1 ).

[0051] Cathode chamber: Graphite cathode tubes reduce heavy metals (such as Pb) through electron transfer. 2+ +2e - →Pb↓), and hydrogen evolution reaction occurs simultaneously to maintain charge balance.

[0052] The first drive motor drives the threaded mixing rod to rotate via a transmission mechanism (drive wheel + transmission belt + transmission wheel), generating a radial / axial composite flow field (Reynolds number Re > 5000). This ensures that: contaminants are in full contact with the electrode surface, bubbles on the electrode surface are removed in a timely manner (to prevent passivation), and the concentration gradient in the reaction zone (mass transfer coefficient k) is maintained. m >10— 4 m / s).

[0053] The power distributor provides an adjustable DC power supply of 0-10V (current density 10-100mA / cm²). 2 ).

[0054] The control panel integrates: online pH / ORP monitoring (accuracy ±0.1%), PID flow control of the solenoid valve (error <5%), and automatic electrode potential adjustment (anti-oxidation).

[0055] Before being discharged through the outlet pipe, the treated water passes through: a neutralization unit (automatically adding NaOH to adjust the pH to 6.5-8.5), a final filtration (5μm security filter), and a solenoid valve that intelligently controls the discharge based on online water quality data.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrocatalytic contaminated ground water pump and treat apparatus, characterized by, Include: The installation platform (1); One side of the top of the installation platform (1) is fixedly connected with a reaction tank (2), the top of the reaction tank (2) is fixedly connected with a water injection pipe (3), and the inner wall of the reaction tank (2) is fixedly connected with an ion exchange membrane (4); The inner bottom wall of the reaction tank (2) is fixedly connected with an insulating connecting plate (5), one side of the bottom of the insulating connecting plate (5) is fixedly connected with an anode pipe (6), the other side of the bottom of the insulating connecting plate (5) is fixedly connected with a cathode pipe (7), and the anode pipe (6) and the cathode pipe (7) are arranged on one side of the ion exchange membrane (4) respectively; The top end of the reaction tank (2) is fixedly connected with an assembly box (8), the inner wall of the assembly box (8) is fixedly connected with a first driving motor (9), the output end of the first driving motor (9) is provided with a driving rod (10), the bottom end of the driving rod (10) is fixedly connected with two driving wheels (11), the inner walls of the two driving wheels (11) are rotatably connected with transmission belts (12), the inner walls of the transmission belts (12) are rotatably connected with transmission wheels (13), the bottom of the transmission wheel (13) is fixedly connected with a movable rod (14), and the surface of the movable rod (14) is fixedly connected with a plurality of threaded mixing rods (15).

2. The electro-catalytic apparatus for treating contaminated ground water by pumping according to claim 1, wherein: The other side of the top of the installation platform (1) is fixedly connected with a first pump body (16), the input end of the first pump body (16) is provided with a first water suction pipe (17), the output end of the first pump body (16) is provided with a drain pipe (18), one side of the top of the installation platform (1) is fixedly connected with a filter tank (19), and the top end of the drain pipe (18) is fixedly connected to the surface of the filter tank (19).

3. The apparatus according to claim 2, wherein: The top of the filter tank (19) is provided with a sealing cover (20), the top of the sealing cover (20) is fixedly connected with a protective box (21), the inner wall of the protective box (21) is fixedly connected with a second driving motor (22), the output end of the second driving motor (22) is provided with a transmission rod (23), and the bottom end of the transmission rod (23) is fixedly connected with a stirring rod (24).

4. The electro-catalytic apparatus for treating contaminated ground water by pumping according to claim 3, wherein: The top of the surface of the stirring rod (24) is sequentially fixedly connected with a coarse sand layer (25), an activated carbon layer (26) and a manganese sand layer (27), and the bottom of the surface of the stirring rod (24) is fixedly connected with a plurality of stirring blades (28).

5. The electro-catalytic apparatus for treating contaminated ground water by pumping according to claim 2, wherein: The surface of the filter tank (19) is fixedly connected with an adding pipe (29), the inner wall of the adding pipe (29) is provided with a one-way valve, and the inner wall of the adding pipe (29) close to the filter tank (19) is fixedly connected with a PH monitor (30).

6. The electro-catalytic apparatus for the treatment of contaminated ground water according to claim 1, characterized in that: The bottom of the mounting platform (1) is fixedly connected with a second pump body (31), the input end of the second pump body (31) is provided with a second water pumping pipe (32), the output end of the second pump body (31) is installed at the bottom end of the water injection pipe (3), the bottom of the mounting platform (1) is fixedly connected with a plurality of support rods (33), the bottom end of the support rod (33) is fixedly connected with a universal wheel (34), the top of the mounting platform (1) is fixedly connected with a power distributor (35) on both sides of the first pump body (16), and the top of the mounting platform (1) is fixedly connected with a control panel (36).

7. The apparatus of claim 1, wherein: the apparatus further comprises a power supply for supplying power to the electrodes. The surface of the reaction tank (2) is fixedly connected with a discharge pipe (37), and the inner wall of the discharge pipe (37) is provided with a solenoid valve (38).

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