Electro-Fenton catalytic oxidation device

Abstract

The invention discloses an electro-Fenton catalytic oxidation device, and belongs to the technical field of sewage treatment. Comprising an electrolyte solution tank, a gear is fixedly connected to the lower surface of the electrolyte solution tank, a rotating rod is fixedly connected to the upper surface of the gear, the top end of the rotating rod penetrates into the electrolyte solution tank and is rotationally connected with the upper surface of the interior of the electrolyte solution tank, and stirring blades are fixedly connected to the lower portion of the outer side wall of the rotating rod; according to the electro-Fenton catalytic oxidation device, through an innovative composite stirring mechanism, the mass transfer efficiency of a reaction system is remarkably improved, and then the pollutant degradation rate is increased. In the traditional Fenton reaction, the contact efficiency of Fe < 2 + >, H2O2 and pollutants is often limited by the solution mixing degree, and the generation amount of. OH is insufficient or the utilization rate is low due to uneven local concentration. In the device, the gear is alternately driven by the left half gear and the right half gear to realize positive and negative rotation alternate motion, so as to drive the rotating rod and the stirring blades to rotate bidirectionally.

Description

Technical Field

[0001] This invention relates to wastewater treatment technology, and more particularly to an electro-Fenton catalytic oxidation device. Background Technology

[0002] With the rapid development of industrial sectors, wastewater discharged from industries such as pharmaceuticals, chemicals, and dyeing contains large amounts of persistent organic pollutants (such as phenols, dyes, and pesticides). These pollutants are characterized by high toxicity, poor biodegradability, and complex composition, making them difficult to remove effectively using traditional biochemical treatment processes, thus posing a major challenge to water environment management. Advanced oxidation technologies are an important means of treating such wastewater, among which electro-Fenton technology generates Fe in situ through electrochemical reactions. 2+ Using H2O2, the electro-Fenton process avoids the drawback of requiring external reagents in the traditional Fenton process, showing great promise in the treatment of recalcitrant organic wastewater. However, the existing stirring systems are mostly designed for unidirectional rotation, which makes it difficult to adapt to wastewaters of different viscosities (such as oily wastewater and high-concentration organic wastewater), easily leading to mixing dead zones. In order to improve mass transfer efficiency, high-speed stirring is often required, resulting in motor energy consumption accounting for more than 60% of the total energy consumption, which limits its application in low-energy-consumption scenarios. In addition, the electrodes are mostly fixed with bolts, requiring the machine to be stopped and residual solution cleaned during disassembly and assembly, affecting continuous operation efficiency. Some devices do not have filter components, and suspended particles in the treated effluent need to be separated by additional equipment, increasing the complexity of the process. These problems make the industrial promotion of electro-Fenton technology face bottlenecks.

[0003] There is an urgent need to optimize mass transfer efficiency, improve reagent utilization, and reduce energy consumption through structural innovation in order to meet the treatment needs of complex industrial wastewater. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to improve the degradation efficiency of pollutants and shorten the reaction time, making it suitable for the treatment of high-concentration, high-viscosity industrial wastewater. Another purpose of this invention is to enable the rapid disassembly and assembly of electrodes (carbon rods, steel blocks) through the interlocking structure of the top cover and the inlet, allowing for replacement or maintenance without stopping the machine for cleaning. The invention also utilizes the cooperation between the perforated plate and the outlet pump to achieve integrated filtration and discharge of the treated solution, reducing subsequent processes.

[0005] Technical solution: An electro-Fenton catalytic oxidation device includes an electrolyte solution tank, a gear is fixedly connected to the lower surface of the electrolyte solution tank, a rotating rod is fixedly connected to the upper surface of the gear, the top end of the rotating rod penetrates into the interior of the electrolyte solution tank and is rotatably connected to the upper surface of the interior of the electrolyte solution tank, and a stirring blade is fixedly connected to the lower side of the outer wall of the rotating rod.

[0006] Furthermore, the electrolyte solution tank has a curved groove inside, and the outer wall of the rotating rod is provided with a perforated turntable. A limiting protrusion is fixedly connected to the outer wall of the rotating rod, and the outer wall of the limiting protrusion is slidably connected to the perforated turntable. A slider is fixedly connected to the outer wall of the perforated turntable, and the slider is slidably connected to the inside of the curved groove. The upper surface of the perforated turntable has symmetrically opened flow ports, and the outer wall of each flow port is rotatably connected to a baffle.

[0007] Furthermore, a top cover is snapped onto the upper surface of the electrolyte solution tank. Symmetrical inlets are provided on the outer side wall of the top cover. A carbon rod is snapped onto the inside of the left inlet, and a steel block is snapped onto the inside of the right inlet. Sealing blocks are fixedly connected to the tops of both the carbon rod and the steel block.

[0008] Furthermore, a fixing ring is fixedly connected to the lower surface of the electrolyte solution tank, a supporting circular plate is fixedly connected to the lower surface of the fixing ring, a motor is fixedly connected to the inner lower surface of the supporting circular plate, a linkage gear is fixedly connected to the bottom of the output end of the motor, and a left half tooth is fixedly connected to the top of the output end of the motor through the fixing ring, and the left half tooth meshes with the gear.

[0009] Furthermore, a short rod is rotatably connected to the left side of the lower surface of the supporting circular plate, and a driven gear is fixedly connected to the bottom end of the short rod. The driven gear meshes with the linkage gear, and the top end of the short rod extends through the fixed ring and is fixedly connected to a right half tooth, which meshes with the gear.

[0010] Furthermore, the outer wall of the electrolyte solution tank is fixedly connected to an outlet chamber, the inside of the outlet chamber is fixedly connected to a leak plate, and the right side of the outlet chamber is fixedly connected to an outlet pump.

[0011] Furthermore, a support base is symmetrically and fixedly connected to the lower surface of the support circular plate.

[0012] Beneficial effects:

[0013] This electro-Fenton catalytic oxidation device significantly improves the mass transfer efficiency of the reaction system through an innovative composite stirring mechanism, thereby accelerating the degradation rate of pollutants. In the traditional Fenton reaction, Fe... 2+The contact efficiency between H2O2 and pollutants is often limited by the degree of solution mixing. Uneven local concentrations can easily lead to insufficient ·OH generation or low utilization. In this device, the gears achieve alternating forward and reverse motion driven by the left and right halves of the gears, driving the rotating rod and stirring blades to rotate in both directions. This avoids the formation of a stable flow field due to unidirectional stirring, thus preventing the formation of mixing dead zones. Simultaneously, when the rotating rod rotates, the limiting protrusion drives the perforated turntable to rotate synchronously. The slider slides along the curved groove, forcing the perforated turntable to reciprocate up and down, forming a three-dimensional motion trajectory of "rotation + axial reciprocation". When the perforated turntable rises, the baffle hangs down under gravity, opening the flow port, allowing the solution to form longitudinal convection through the orifice. When it descends, the baffle closes due to liquid resistance, creating a squeezing impact on the solution below and enhancing the intensity of local turbulence.

[0014] The device effectively optimizes the Fenton reaction environment through dynamic flow field design, improving degradation efficiency while reducing reagent loss and equipment energy consumption. In traditional electro-Fenton devices, Fe... 2+ High local concentrations can easily lead to oxidation failure, while H2O2 may not participate fully in the reaction due to insufficient mass transfer, resulting in reagent waste and increased byproducts. In this device, the reciprocating motion of the perforated rotating disk creates periodic pressure changes, causing the solution to circulate and convect within the electrolyte solution tank: during the rising phase, the upper layer solution is drawn in through the flow port, and during the descending phase, the lower layer solution is pushed out through the baffle, allowing Fe... 2+ The H2O2 is evenly distributed throughout the entire tank to avoid localized excesses that could lead to Fe. 3+ Accumulation or ineffective decomposition of H2O2 is prevented. In addition, the alternating forward and reverse stirring mode reduces the directional scouring of the solution on the tank wall and reduces equipment wear. The synergistic effect of the perforated turntable and stirring blades can achieve efficient mixing at lower speeds, and the motor power requirement is reduced by more than 25% compared with traditional single stirring systems. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of the electrolyte solution tank of the present invention;

[0018] Figure 4 This is a schematic diagram of the bottom structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the liquid outlet chamber of the present invention.

[0021] In the diagram: 1. Electrolyte solution tank; 2. Gear; 3. Rotating rod; 9. Stirring blade; 27. Curved groove; 5. Perforated turntable; 4. Limiting protrusion; 6. Sliding block; 7. Flow port; 8. Baffle; 10. Top cover; 11. Inlet; 12. Carbon rod; 13. Steel block; 14. Sealing block; 15. Fixing ring; 16. Supporting circular plate; 17. Motor; 18. Linkage gear; 19. Left half gear; 20. Short rod; 21. Driven gear; 22. Right half gear; 23. Discharge chamber; 24. Leaking plate; 25. Discharge pump; 26. Support base. Detailed Implementation

[0022] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] like Figures 1-6 As shown, an electro-Fenton catalytic oxidation device is provided, including an electrolyte solution tank 1. A gear 2 is fixedly connected to the lower surface of the electrolyte solution tank 1, and a rotating rod 3 is fixedly connected to the upper surface of the gear 2. The top end of the rotating rod 3 penetrates into the interior of the electrolyte solution tank 1 and is rotatably connected to the upper surface of the interior of the electrolyte solution tank 1. A stirring blade 9 is fixedly connected to the lower side of the outer wall of the rotating rod 3. A top cover 10 is engaged with the upper surface of the electrolyte solution tank 1. An inlet 11 is symmetrically opened on the outer wall of the top cover 10. A carbon rod 12 is engaged with the interior of the left inlet 11, and a steel block 13 is engaged with the interior of the right inlet 11. A sealing block 14 is fixedly connected to the top of both the carbon rod 12 and the steel block 13.

[0025] Wastewater and electrolyte to be treated are added to the electrolyte solution tank 1 through the inlet 11 on the outer wall of the top cover 10. Then, a carbon rod 12 is engaged and connected inside the left inlet 11 as a cathode, and a steel block 13 is engaged and connected inside the right inlet 11 as an anode. The sealing block 14 at the top ensures a seal at the inlet 11 to prevent solution leakage. After the power is turned on, the steel block 13, acting as the anode, undergoes an oxidation reaction, releasing Fe. 2+ When carbon rod 12 is used as the cathode, H2O2 is generated, and Fe... 2+ It undergoes a Fenton reaction with H₂O₂ in solution to produce ·OH, a highly oxidizing compound, thereby degrading pollutants in wastewater. Simultaneously, gear 2 rotates under external power, driving the rotating rod 3 and the stirring blades 9 on the outer wall to rotate, ensuring thorough mixing of the solution in the electrolyte solution tank 1 and increasing Fe... 2+ The contact efficiency between H2O2 and pollutants is measured. After the reaction is complete, the power is turned off, the top cover 10 is removed, the carbon rod 12 and the steel block 13 are taken out, and the treated solution is discharged to complete one purification process.

[0026] In this embodiment, the electrolyte solution tank 1 has a curved groove 27 inside. A perforated turntable 5 is provided on the outer wall of the rotating rod 3. A limiting protrusion 4 is fixedly connected to the outer wall of the rotating rod 3, and the outer wall of the limiting protrusion 4 is slidably connected to the perforated turntable 5. A slider 6 is fixedly connected to the outer wall of the perforated turntable 5, and the slider 6 is slidably connected to the inside of the curved groove 27. Flow ports 7 are symmetrically provided on the upper surface of the perforated turntable 5, and baffles 8 are rotatably connected to the outer walls of each flow port 7. A fixing ring 15 is fixedly connected to the lower surface of the electrolyte solution tank 1, and a supporting circular plate 16 is fixedly connected to the lower surface of the fixing ring 15. A motor 17 is fixedly connected to the inner lower surface of the supporting circular plate 16, and a linkage is fixedly connected to the bottom of the output end of the motor 17. The top of the output end of the gear 18 and the motor 17 extends through to the fixed ring 15 and is fixedly connected to the left half tooth 19, which meshes with the gear 2. The lower surface of the supporting circular plate 16 is rotatably connected to the left side of the short rod 20, and the bottom end of the short rod 20 is fixedly connected to the driven gear 21, which meshes with the linkage gear 18. The top of the short rod 20 extends through to the fixed ring 15 and is fixedly connected to the right half tooth 22, which meshes with the gear 2. The outer wall of the electrolyte solution tank 1 is fixedly connected to the outlet chamber 23, and the inside of the outlet chamber 23 is fixedly connected to the leak plate 24. The right side of the outlet chamber 23 is fixedly connected to the outlet pump 25. The lower surface of the supporting circular plate 16 is symmetrically fixedly connected to the supporting base 26.

[0027] When the reaction starts, the motor 17 on the supporting circular plate 16 begins to operate, and its output simultaneously drives the top left half-tooth 19 and the bottom linkage gear 18 to rotate. The linkage gear 18 meshes with the driven gear 21 at the bottom of the short rod 20, causing the right half-tooth 22 at the top of the short rod 20 to rotate synchronously. The left half-tooth 19 and the right half-tooth 22 alternately mesh with the gear 2 at the bottom of the electrolyte solution tank 1, driving the tank body and the internal rotating rod 3 to perform alternating forward and reverse movements. When the rotating rod 3 rotates, the limiting protrusion 4 on the outer wall drives the perforated turntable 5 to rotate synchronously. The slider 6 on the outer side of the turntable slides along the curved groove 27 on the inner wall of the electrolyte solution tank 1, forcing the perforated turntable 5 to move up and down reciprocally while rotating. At this point, the flow port 7 on the turntable changes with the motion: during the upward phase, the baffle 8 opens due to gravity, allowing the solution to pass through the flow port 7; during the downward phase, the baffle 8 closes due to liquid resistance, enhancing the stirring impact on the solution and improving reaction uniformity. After processing, the filter plate 24 in the outlet chamber 23 filters out larger impurities, and the outlet pump 25 starts, drawing the treated solution from the electrolyte solution tank 1 into the outlet chamber 23, where it is discharged after secondary filtration by the filter plate 24. Throughout the process, the fixing ring 15 secures the connection between the electrolyte solution tank 1 and the supporting circular plate 16, and the supporting base 26 ensures the overall stability of the device. The reciprocating motion of the perforated turntable 5 and the rotation of the stirring blade 9 form a compound stirring, significantly improving reaction efficiency and ensuring the complete degradation of pollutants.

[0028] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An electro-Fenton catalytic oxidation device, comprising an electrolyte solution tank (1), characterized in that: A gear (2) is fixedly connected to the lower surface of the electrolyte solution tank (1), and a rotating rod (3) is fixedly connected to the upper surface of the gear (2). The top end of the rotating rod (3) penetrates into the interior of the electrolyte solution tank (1) and is rotatably connected to the upper surface of the interior of the electrolyte solution tank (1). A stirring blade (9) is fixedly connected to the lower side of the outer wall of the rotating rod (3).

2. The electro-Fenton catalytic oxidation device according to claim 1, characterized in that: The electrolyte solution tank (1) has a curved groove (27) inside. The outer wall of the rotating rod (3) is provided with a perforated turntable (5). The outer wall of the rotating rod (3) is fixedly connected to a limiting protrusion (4). The outer wall of the limiting protrusion (4) is slidably connected to the perforated turntable (5). The outer wall of the perforated turntable (5) is fixedly connected to a slider (6). The slider (6) is slidably connected to the inside of the curved groove (27). The upper surface of the perforated turntable (5) is symmetrically provided with flow ports (7). The outer wall of each flow port (7) is rotatably connected to a baffle (8).

3. The electro-Fenton catalytic oxidation device according to claim 1, characterized in that: The upper surface of the electrolyte solution tank (1) is fitted with a top cover (10). The outer side wall of the top cover (10) is symmetrically provided with inlet ports (11). A carbon rod (12) is fitted inside the inlet port (11) on the left side, and a steel block (13) is fitted inside the inlet port (11) on the right side. A sealing block (14) is fixedly connected to the top of both the carbon rod (12) and the steel block (13).

4. The electro-Fenton catalytic oxidation device according to claim 1, characterized in that: A fixing ring (15) is fixedly connected to the lower surface of the electrolyte solution tank (1). A supporting circular plate (16) is fixedly connected to the lower surface of the fixing ring (15). A motor (17) is fixedly connected to the lower inner surface of the supporting circular plate (16). A linkage gear (18) is fixedly connected to the bottom of the output end of the motor (17). The top of the output end of the motor (17) extends through the fixing ring (15) and is fixedly connected to a left half tooth (19). The left half tooth (19) meshes with the gear (2).

5. The electro-Fenton catalytic oxidation device according to claim 4, characterized in that: A short rod (20) is rotatably connected to the left side of the lower surface of the supporting circular plate (16). A driven gear (21) is fixedly connected to the bottom end of the short rod (20). The driven gear (21) meshes with the linkage gear (18). The top end of the short rod (20) extends through the fixed ring (15) and is fixedly connected to a right half tooth (22). The right half tooth (22) meshes with the gear (2).

6. The electro-Fenton catalytic oxidation device according to claim 1, characterized in that: The outer wall of the electrolyte solution tank (1) is fixedly connected to the outlet chamber (23), the inside of the outlet chamber (23) is fixedly connected to the leak plate (24), and the right side of the outlet chamber (23) is fixedly connected to the outlet pump (25).

7. The electro-Fenton catalytic oxidation device according to claim 1, characterized in that: The lower surface of the supporting circular plate (16) is symmetrically and fixedly connected to a supporting base (26).

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