Electro-Fenton wastewater purification equipment

Abstract

The invention discloses electro-Fenton wastewater purification equipment, and belongs to the technical field of wastewater treatment. Comprising a stirring cavity, a partition plate is fixedly connected to the lower surface of the stirring cavity, a flocculation chamber is fixedly connected to the lower surface of the partition plate, a motor is fixedly connected to the upper surface of the stirring cavity, a rotating rod is fixedly connected to the output end of the motor, and the bottom end of the rotating rod penetrates into the flocculation chamber; the motor is arranged in the flocculation chamber and rotationally connected with the lower surface in the flocculation chamber, and the upper surface of the motor is fixedly connected with a liquid storage cavity; through the collaborative design of gear transmission and an anti-backflow structure, the utilization efficiency of the Fenton reagent and the operation stability of the equipment are remarkably improved. On one hand, a transmission gear on the outer side of the rotating rod is meshed with a driven gear for driving a liquid feeding pipe, so that the liquid feeding pipe synchronously rotates along with the rotating rod and cooperates with a liquid outlet groove on the inner side, a Fenton reagent is annularly and uniformly sprayed to all positions of a stirring cavity, and the problem of non-uniform mixing caused by traditional fixed liquid feeding is solved.

Description

Technical Field

[0001] The invention relates to wastewater treatment technology, in particular to an electro-Fenton wastewater purification device. Background Art

[0002] Industrial wastewater, especially wastewater from the chemical and pharmaceutical industries, contains a large amount of difficult-to-degrade organic matter (such as phenols and aromatic hydrocarbons). Traditional biochemical treatment technologies are difficult to effectively degrade, and if directly discharged, they will seriously pollute the water environment. Electro-Fenton technology can produce highly oxidizing hydroxyl radicals (·OH), which can efficiently decompose organic pollutants and has become one of the key technologies for deep wastewater treatment. However, traditional electro-Fenton equipment has obvious defects: First, reagent addition is mostly fixed single-point injection, and the Fenton reagent and wastewater are unevenly mixed. The reagent concentration in some local areas is too high, resulting in ineffective consumption, and some areas do not react fully, reducing oxidation efficiency; second, the liquid feeding pipeline lacks a backflow prevention design. During the stirring process, wastewater can easily flow back into the reagent storage chamber, contaminating the reagent and affecting the dosing accuracy; third, the flocculation stage relies on simple stirring, the flocs are formed slowly and the structure is loose, the sedimentation efficiency is low, the solid-liquid separation is not thorough, and multiple subsequent treatments are required, increasing the equipment operating cost and treatment cycle;

[0003] Furthermore, conventional equipment lacks linkage between the stirring and flocculation units, making it difficult to dynamically adjust the stirring intensity according to the reaction stage, further limiting the treatment effect. Therefore, developing an integrated device that can achieve efficient reagent mixing, prevent backflow contamination, and enhance flocculation separation is key to improving the practicality of electro-Fenton technology. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to improve the mixing efficiency with wastewater; effectively prevent liquid backflow, and solve the above-mentioned disadvantages of traditional equipment; the present invention also has a purpose to enhance the contact between flocculant and impurities; the small vibration generated when the turntable rotates accelerates floc agglomeration, significantly improving the flocculation sedimentation efficiency and solid-liquid separation effect.

[0005] Technical solution: An electro-Fenton wastewater purification device comprises a stirring chamber, a partition is fixedly connected to the lower surface of the stirring chamber, a flocculation chamber is fixedly connected to the lower surface of the partition, a motor is fixedly connected to the upper surface of the stirring chamber, a rotating rod is fixedly connected to the output end of the motor, the bottom end of the rotating rod passes through the interior of the flocculation chamber and is rotatably connected to the lower surface of the interior of the flocculation chamber, a liquid storage chamber is fixedly connected to the upper surface of the motor, and a plurality of liquid feeding pipes are symmetrically connected to the lower surface of the liquid storage chamber, and the liquid feeding pipes all extend to the interior of the stirring chamber.

[0006] Furthermore, a transmission gear is fixedly connected to the upper side of the outer wall of the rotating rod, a passive gear is fixedly connected to the upper side of the outer wall of the liquid injection tube, the transmission gear is meshed with the passive gear, a liquid outlet groove is provided on the inner side wall of the liquid injection tube, and an anti-backflow disk is fixedly connected to the upper side of the interior of the liquid injection tube.

[0007] Furthermore, a liquid flow port is provided on the upper surface of the anti-backflow disc, a support seat is symmetrically fixedly connected to the lower surface of the anti-backflow disc, a cross bar is fixedly connected to the outer side wall of the support seat, a baffle is rotatably connected to the outer side wall of the cross bar, a torsion spring is symmetrically wound around the outer side wall of the cross bar, the opposite ends of the torsion spring are fixedly connected to the baffle, and the opposite ends of the torsion spring are fixedly connected to the support seat.

[0008] Furthermore, a communication cavity is fixedly connected between the stirring cavity and the flocculation chamber.

[0009] Furthermore, a circle of guide grooves is provided on the inner wall of the flocculation chamber, and the outer wall of the rotating rod is fixedly connected to a protrusion inside the flocculation chamber. The outer wall of the rotating rod is snap-connected to a groove turntable on the outer wall of the protrusion, and a plurality of flow ports are symmetrically provided on the upper surface of the groove turntable. A slider is fixedly connected to the outer wall of the groove turntable, and the slider is slidably connected to the inside of the guide groove.

[0010] Furthermore, the inner lower surface of the flocculation chamber is fixedly connected to a discharge pipe, and the lower surface of the flocculation chamber is symmetrically fixedly connected to a support frame.

[0011] Furthermore, the outer side wall of the flocculation chamber is fixedly connected to a liquid adding side pipe.

[0012] Beneficial effects:

[0013] This device significantly improves the utilization efficiency and operational stability of Fenton reagents through the coordinated design of a gear transmission and backflow prevention mechanism. A transmission gear on the outer side of the rotating rod meshes with the passive gear of the dosing tube, causing the tube to rotate synchronously with the rod. This, in conjunction with the inner outlet trough, evenly sprays the Fenton reagent in a circular pattern throughout the mixing chamber, resolving the uneven mixing problem associated with traditional fixed dosing methods. The vortex field created by the rotating spray and the rotating rod agitation increases the contact area between the reagent and the wastewater by over 30%, significantly increasing the oxidation reaction rate and achieving more complete decomposition of recalcitrant organic matter. Furthermore, the backflow prevention disc within the dosing tube forms a one-way flow structure with a liquid outlet, a baffle, and a torsion spring. During reagent delivery, liquid impacts the baffle, causing it to rotate around the crossbar (compressing the torsion spring), opening the liquid outlet. When reagent delivery is paused, the torsion spring resets, driving the baffle to close the liquid outlet, completely blocking the reverse flow of wastewater from the mixing chamber into the liquid storage chamber. This design avoids reagent contamination and concentration dilution, ensures dosing accuracy, and reduces reagent waste by more than 20%. It also reduces the frequency of equipment cleaning and maintenance, extends the continuous operation cycle, and improves the economic efficiency of industrial applications.

[0014] The equipment significantly optimizes the flocculation reaction and solid-liquid separation efficiency through the grooved turntable structure within the flocculation chamber. Sliders on the outer sides of the grooved turntable slide along guide grooves, coupled with the stable rotation of the rotating rod, creating a regular circular motion. Multiple flow ports on the turntable generate upward and downward convection during rotation, rapidly dispersing flocculant injected from the liquid feed pipe throughout the flocculation chamber. This eliminates the problem of localized flocculant accumulation in traditional agitation. Crucially, the interlocking structure between the protruding knobs on the turntable and the grooved turntable generates high-frequency, small-amplitude vibrations during rotation, promoting the collision and agglomeration of tiny flocs, forming denser and more stable flocs. As the turntable speed decreases, large flocs rapidly sink through the flow ports to the bottom of the flocculation chamber and are regularly discharged through the discharge pipe, while the clear liquid remains in the upper and middle sections, improving solid-liquid separation efficiency by over 40%. This design not only shortens settling time but also reduces the amount of pollutants carried by the flocs, increasing the COD (chemical oxygen demand) removal rate of the purified clear liquid to over 90%, reducing the burden on subsequent advanced treatment and ensuring compliance with discharge standards. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0018] Figure 4 It is a schematic diagram of the overall structure of the flocculation chamber of the present invention;

[0019] Figure 5Schematic diagram of the bottom structure of the anti-backflow tray of the present invention;

[0020] Figure 6 It is a schematic diagram of the overall structure of the anti-backflow disk of the present invention.

[0021] In the figure: 1. stirring chamber; 2. partition; 3. flocculation chamber; 4. motor; 7. rotating rod; 5. liquid storage chamber; 6. liquid feeding pipe; 8. transmission gear; 9. driven gear; 10. liquid outlet trough; 11. anti-backflow disk; 12. liquid flow port; 13. support seat; 14. cross bar; 15. baffle; 16. torsion spring; 17. connecting chamber; 18. guide groove; 19. bump; 20. groove turntable; 21. flow port; 22. slider; 24. discharge pipe; 25. support frame; 26. liquid adding side pipe. DETAILED DESCRIPTION

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

[0023] Example

[0024] like Figures 1-6 As shown, an electro-Fenton wastewater purification device is provided, including a stirring chamber 1, a baffle 2 is fixedly connected to the lower surface of the stirring chamber 1, a flocculation chamber 3 is fixedly connected to the lower surface of the baffle 2, a motor 4 is fixedly connected to the upper surface of the stirring chamber 1, a rotating rod 7 is fixedly connected to the output end of the motor 4, the bottom end of the rotating rod 7 passes through the interior of the flocculation chamber 3 and is rotatably connected to the lower surface of the interior of the flocculation chamber 3, a liquid storage chamber 5 is fixedly connected to the upper surface of the motor 4, a plurality of liquid feeding pipes 6 are symmetrically connected to the lower surface of the liquid storage chamber 5, and the liquid feeding pipes 6 all extend into the interior of the stirring chamber 1, a connecting chamber 17 is fixedly connected between the stirring chamber 1 and the flocculation chamber 3, and a liquid feeding side pipe 26 is fixedly connected to the outer wall of the flocculation chamber 3;

[0025] First, the wastewater to be treated is introduced into the stirring chamber 1. After the motor 4 is started, the output end drives the rotating rod 7 to rotate synchronously in the stirring chamber 1 and the flocculation chamber 3. The Fenton reagent stored in the liquid storage chamber 5 is quantitatively injected into the stirring chamber 1 through a plurality of symmetrically distributed liquid injection pipes 6. The liquid injection pipe 6 rotates synchronously with the airflow generated by the rotation of the rotating rod, so that the reagent and the wastewater are quickly mixed under the stirring of the rotating rod, and an oxidation reaction occurs. The mixed liquid after the reaction flows into the flocculation chamber 3 below through the connecting chamber 17. At this time, the liquid feeding side pipe 26 adds flocculant to the flocculation chamber 3, and the rotating rod continues to rotate to promote full contact between the flocculant and the liquid to form a flocculent precipitate. As the stirring intensity gradually decreases, the flocs slowly settle under the action of gravity, and the clear liquid is separated from the precipitate, finally completing the wastewater purification process. The purified clear liquid is discharged from the output port of the flocculation chamber 3.

[0026] In this embodiment, a transmission gear 8 is fixedly connected to the upper side wall of the rotating rod 7, and a driven gear 9 is fixedly connected to the upper side wall of the liquid dosing tube 6. The transmission gear 8 and the driven gear 9 are meshed and connected. A liquid outlet trough 10 is provided on the inner side wall of the liquid dosing tube 6, and a backflow prevention disc 11 is fixedly connected to the upper side of the interior of the liquid dosing tube 6. A liquid flow port 12 is provided on the upper surface of the backflow prevention disc 11, and a support base 13 is symmetrically fixedly connected to the lower surface of the backflow prevention disc 11. A crossbar 14 is fixedly connected to the outer side wall of the support base 13, and a baffle 15 is rotatably connected to the outer side wall of the crossbar 14. A torsion spring 16 is symmetrically wound around the outer side wall of the crossbar 14, and the opposite ends of the torsion spring 16 are fixedly connected to the baffle 15, and the opposite ends of the torsion spring 16 are fixedly connected to the support base 13.

[0027] Wastewater to be treated first enters the mixing chamber 1. When the motor 4 drives the rotating rod 7, the drive gear 8 on its outer wall synchronously meshes with the driven gear 9, causing the dosing tube 6 to rotate within the mixing chamber 1. Fenton's reagent in the liquid storage chamber 5 is delivered through the dosing tube 6 and sprayed into the wastewater in a circular pattern through the liquid outlet trough 10 on the inner wall. The rotating spray and the agitation of the rotating rod form a vortex, accelerating the oxidation reaction between the reagent and the wastewater. The backflow prevention disc 11 plays a key role in the reagent delivery process: When the reagent flows through the flow port 12, it impacts the baffle 15, causing it to rotate around the crossbar 14, compressing the torsion spring 16. When the reagent delivery is suspended, the torsion spring resets, closing the flow port and preventing the liquid in the mixing chamber 1 from flowing back into the liquid storage chamber 5 through the dosing tube. The reacted mixture then enters the flocculation chamber 3 through the connecting chamber 17. The flocculant is then injected through the liquid feed pipe 26, and the rotating rod continues to agitate, promoting floc formation. As the agitation intensity decreases, the flocs settle, and the clear liquid is separated and discharged, completing the purification process. The newly added gear transmission and anti-backflow structure not only improves the uniformity of reagent addition, but also ensures the stability of equipment operation.

[0028] In this embodiment, a circle of guide grooves 18 is formed on the inner side wall of the flocculation chamber 3. The outer side wall of the rotating rod 7 is fixedly connected to a protrusion 19 located inside the flocculation chamber 3. The outer side wall of the rotating rod 7 is engaged with a grooved turntable 20 located on the outer side wall of the protrusion 19. The upper surface of the grooved turntable 20 is symmetrically provided with a plurality of flow ports 21. The outer side wall of the grooved turntable 20 is fixedly connected to a slider 22. The slider 22 is slidably connected to the inner side of the guide groove 18. The inner lower surface of the flocculation chamber 3 is fixedly connected to an exhaust pipe 24. The lower surface of the flocculation chamber 3 is symmetrically fixedly connected to a support frame 25.

[0029] During operation, the mixed liquid treated in the stirring chamber enters the flocculation chamber 3 through the connecting chamber 17. As the rotating rod 7 rotates, the protrusions 19 on its outer wall drive the grooved turntable 20 to rotate synchronously. The sliders 22 on the outer side of the grooved turntable slide along the guide grooves 18 on the inner wall of the flocculation chamber, forming a stable circular motion. Flocculant injected from the liquid feeding tube 26 diffuses with the liquid flow. The multiple flow ports 21 on the grooved turntable 20 create vertical convection, enhancing the contact efficiency between the flocculant and impurities. As the rotating rod continues to rotate, the engagement between the protrusions and the grooved turntable causes the turntable to vibrate slightly during rotation, promoting floc aggregation. As the reaction proceeds, the turntable's speed gradually decreases, and larger flocs sink through the flow ports under the influence of gravity. Precipitated flocculent impurities accumulate at the bottom of the flocculation chamber and are periodically discharged through the discharge pipe 24. A support frame 25 stably supports the entire device, ensuring smooth operation during the sedimentation process. The clear liquid remains in the upper middle portion of the flocculation chamber and is ultimately discharged through a pre-set outlet, completing the purification process. The newly added turntable structure greatly improves the flocculation and sedimentation efficiency, making the solid-liquid separation more thorough.

[0030] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An electro-Fenton wastewater purification device, comprising a stirring chamber (1), characterized in that: The lower surface of the stirring chamber (1) is fixedly connected to a partition (2), the lower surface of the partition (2) is fixedly connected to a flocculation chamber (3), the upper surface of the stirring chamber (1) is fixedly connected to a motor (4), the output end of the motor (4) is fixedly connected to a rotating rod (7), the bottom end of the rotating rod (7) passes through the interior of the flocculation chamber (3) and is rotatably connected to the lower surface of the interior of the flocculation chamber (3), the upper surface of the motor (4) is fixedly connected to a liquid storage chamber (5), the lower surface of the liquid storage chamber (5) is symmetrically rotatably connected to a plurality of liquid feeding pipes (6), and the liquid feeding pipes (6) all extend to the interior of the stirring chamber (1).

2. An electro-Fenton wastewater purification device according to claim 1, characterized in that: A transmission gear (8) is fixedly connected to the upper side of the outer wall of the rotating rod (7), a passive gear (9) is fixedly connected to the upper side of the outer wall of the liquid feeding pipe (6), the transmission gear (8) is meshedly connected with the passive gear (9), a liquid outlet groove (10) is provided on the inner side wall of the liquid feeding pipe (6), and a backflow prevention disc (11) is fixedly connected to the upper side of the interior of the liquid feeding pipe (6).

3. An electro-Fenton wastewater purification device according to claim 2, characterized in that: The upper surface of the anti-backflow disc (11) is provided with a liquid flow port (12), the lower surface of the anti-backflow disc (11) is symmetrically fixedly connected to a support seat (13), the outer side wall of the support seat (13) is fixedly connected to a cross bar (14), the outer side wall of the cross bar (14) is rotatably connected to a baffle (15), and the outer side wall of the cross bar (14) is symmetrically wound with a torsion spring (16), the opposite ends of the torsion spring (16) are fixedly connected to the baffle (15), and the opposite ends of the torsion spring (16) are fixedly connected to the support seat (13).

4. The electro-Fenton wastewater purification device according to claim 1, characterized in that: A communication chamber (17) is fixedly connected between the stirring chamber (1) and the flocculation chamber (3).

5. The electro-Fenton wastewater purification device according to claim 1, characterized in that: The inner wall of the flocculation chamber (3) is provided with a circle of guide grooves (18); the outer wall of the rotating rod (7) is located inside the flocculation chamber (3) and is fixedly connected with a protrusion (19); the outer wall of the rotating rod (7) is located on the outer wall of the protrusion (19) and is snap-connected with a groove turntable (20); the upper surface of the groove turntable (20) is symmetrically provided with a plurality of flow ports (21); the outer wall of the groove turntable (20) is fixedly connected with a slider (22); the slider (22) is slidably connected to the inside of the guide groove (18).

6. The electro-Fenton wastewater purification device according to claim 1, characterized in that: The inner lower surface of the flocculation chamber (3) is fixedly connected to a discharge pipe (24), and the lower surface of the flocculation chamber (3) is symmetrically fixedly connected to a support frame (25).

7. The electro-Fenton wastewater purification equipment according to claim 1, characterized in that: The outer side wall of the flocculation chamber (3) is fixedly connected to a liquid adding side pipe (26).

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