A heavy metal wastewater treatment device and a treatment method
By combining the synergistic structure of the rotating hollow cylindrical cathode and the central sealing body with the spiral blades and lifting mechanism, the problems of flow channel short circuit and sediment blockage in the electrochemical heavy metal wastewater treatment device are solved, achieving efficient heavy metal removal and uniform electrolysis reaction, and ensuring the long-term stable operation of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WEIFANG GUANGDE MASCH CO LTD
- Filing Date
- 2026-04-18
- Publication Date
- 2026-06-12
AI Technical Summary
Existing electrochemical heavy metal wastewater treatment devices suffer from problems such as flow channel short circuits, dead water zones, sediment blockage, and low current efficiency, resulting in low treatment efficiency and high operation and maintenance costs.
The system employs a synergistic structure of a rotating hollow cylindrical cathode and a central sealing body, combined with spiral blades and a lifting mechanism, to achieve spiral flow of wastewater and self-cleaning of the electrode surface, thereby preventing sediment formation and increasing specific surface area and mass transfer efficiency.
It effectively blocks water flow short circuits, eliminates dead water zones, improves heavy metal removal efficiency and electrolysis reaction uniformity, avoids scale buildup, ensures long-term stable operation of the device, and reduces maintenance frequency.
Smart Images
Figure CN122187199A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wastewater treatment technology, specifically to a heavy metal wastewater treatment device and treatment method. Background Technology
[0002] With the rapid development of industrial manufacturing, the discharge of heavy metal wastewater is increasing daily. The heavy metal ions it contains, such as lead, cadmium, and chromium, are highly toxic and difficult to degrade. If discharged directly without effective treatment, they will seriously pollute water bodies and soil ecosystems, threatening human health. Therefore, the compliant treatment of heavy metal wastewater has become an important issue in the environmental protection field. Electrochemical treatment technology, due to its advantages such as no need to add chemical agents, less secondary pollution, high potential for heavy metal recovery, and simple operation, has become one of the mainstream technologies for heavy metal wastewater treatment. Under a direct current electric field, dissolved heavy metals are converted into elemental deposition and hydroxide precipitation, achieving removal and resource recovery. It is widely used in wastewater treatment in industries such as electroplating, metallurgy, and chemicals.
[0003] Existing electrochemical heavy metal wastewater treatment devices mostly adopt a fixed electrode structure. On the one hand, the flow channels between fixed electrodes are prone to forming water flow short circuits and local dead water zones, resulting in a large amount of wastewater being discharged without fully participating in the electrolysis reaction, leading to low treatment efficiency and incomplete removal of heavy metals. On the other hand, heavy metals and hydroxides deposit on the cathode surface to form a dense scale layer, blocking electron transfer and causing a sharp drop in current efficiency. This necessitates shutdown for manual cleaning, resulting in high operation and maintenance costs, production interruptions, and affecting the efficiency and quality of wastewater treatment.
[0004] Therefore, we propose a heavy metal wastewater treatment device and treatment method. Summary of the Invention
[0005] The purpose of this invention is to provide a heavy metal wastewater treatment device and method to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a heavy metal wastewater treatment device, comprising an outer cylinder anode, a rotating hollow cylindrical cathode rotatably connected to the outer cylinder anode via a rotating mechanism, and an annular flow channel formed between the rotating hollow cylindrical cathode and the outer cylinder anode; a central sealing body fixedly connected to the rotating hollow cylindrical cathode, and an annular gap formed between the central sealing body and the rotating hollow cylindrical cathode; a spiral blade disposed within the annular flow channel, and the spiral blade fixedly sleeved on the side wall of the rotating hollow cylindrical cathode and in contact with the outer cylinder anode; multiple baffles disposed within the annular gap, and the baffles fixed to the side wall of the central sealing body; a water inlet mechanism disposed at the bottom of the outer cylinder anode; a water outlet pipe connected to the top of the outer cylinder anode; and a lifting mechanism disposed at the top of the outer cylinder anode for driving the rotating hollow cylindrical cathode to move up and down.
[0007] Preferably, the rotating mechanism includes a spline shaft that passes through the top of the outer cylinder anode, and the lower end of the spline shaft is fixed to the top of the rotating hollow cylindrical cathode. A U-shaped frame is fixedly connected to the top of the outer cylinder anode, and a motor is fixedly connected to the top of the U-shaped frame. A spline sleeve is fixedly connected to the output end of the motor, and the spline sleeve is fitted onto the side wall of the spline shaft.
[0008] By adopting the above technical solution, the motor is started, and the rotation of the motor drives the spline sleeve to rotate, which in turn drives the rotating hollow cylindrical cathode and the central sealing body to rotate through the spline shaft. When the rotating hollow cylindrical cathode rotates, it drives the spiral blades to rotate, allowing the wastewater entering the annular flow channel to be spirally transported along the spiral flow channel formed by the spiral blades. This increases the travel distance of the wastewater flow, improving the treatment effect and quality. Furthermore, the centrifugal force generated by the rotation of the hollow cylindrical cathode will "shake off" the metal hydroxide, sludge, and other deposits on the electrode surface, carrying them away with the water flow and preventing the formation of a dense scale layer. The hollow structure increases the specific surface area, and the rotation agitates the surrounding water flow, actively "pushing" heavy metal ions to the electrode surface, significantly improving the mass transfer efficiency. When the central sealing body rotates, it drives the baffle to rotate. The internal baffle blocks the straight-through gap, forcing water to pass out through the hollow holes and enter the spiral flow channel, improving the treatment efficiency and quality.
[0009] Preferably, the lifting mechanism includes a first ring fixedly sleeved on the side wall of the spline shaft, and a reset mechanism is provided between the first ring and the spline sleeve. A plurality of arc-shaped push plates are fixedly connected to the bottom of the first ring, and the side wall of the push plate is provided with an inclined surface. The top of the outer cylinder anode is rotatably connected to a plurality of rollers through a rotating assembly, and the rollers can roll along the inclined surface and the bottom of the push plate.
[0010] By adopting the above technical solution, when the spline shaft rotates, it can drive the first ring and the push plate to rotate. When the roller slides along the inclined plane to the bottom of the push plate, it can push the first ring to move upward. When the roller passes the push plate, the first ring can move downward to reset under the action of the reset mechanism, and drive the central sealing body to move downward to reset through the spline shaft. By repeating this process, the rotating hollow cylindrical cathode can move up and down back and forth, which can create a shaking effect, making it easier for the attached substances to detach. In addition, when the rotating hollow cylindrical cathode moves up and down back and forth, it can drive the spiral blades to move up and down back and forth along the side wall of the outer cylinder anode, which can scrape the surface of the outer cylinder anode, ensuring that the inner wall of the outer cylinder anode does not scale or sludge. At the same time, it makes the sewage flow disturbance in the annular flow channel stronger, and the electrolysis efficiency is greatly improved.
[0011] Preferably, the reset mechanism includes a second ring fixedly sleeved on the side wall of the spline sleeve, and a first spring telescopic rod is fixedly connected between the second ring and the first ring.
[0012] By adopting the above technical solution, the spline shaft and the rotating hollow cylindrical cathode can be reset.
[0013] Preferably, the rotating assembly includes multiple support frames fixedly connected to it, and the rollers are rotatably connected to the side walls of the support frames via a rotating shaft.
[0014] By adopting the above technical solution, the normal rolling of the roller is guaranteed.
[0015] Preferably, the water inlet mechanism includes a rotating disk rotatably connected to the bottom of the outer cylinder anode, and a water inlet hole is provided through the top of the rotating disk. An annular cover is fixedly connected to the bottom of the outer cylinder anode through a connecting block, and the rotating disk is rotatably connected to the top of the annular cover. The water inlet hole communicates with the annular cover, and a water inlet pipe is connected to the bottom of the annular cover. Two symmetrically arranged connecting rods are fixedly connected to the bottom of the rotating hollow cylindrical cathode, and the rotating disk is sleeved on the side wall of the connecting rods.
[0016] By adopting the above technical solution, when electrochemically treating heavy metal wastewater, the wastewater is supplied into the annular hood through the inlet pipe, and then enters the annular flow channel between the outer cylinder anode and the rotating hollow cylindrical cathode through the inlet hole. When the rotating hollow cylindrical cathode rotates, it can drive the rotating disk to rotate through the connecting rod, and then drive the inlet hole to rotate. This can achieve 360° uniform water distribution, enhance the initial reaction disturbance, and at the same time, it can scrape the bottom sediment and prevent the bottom sludge dead zone. Moreover, no additional power is required, which improves the efficiency and effect of treatment.
[0017] Preferably, the side wall of the central sealing body is provided with a flushing mechanism. The flushing mechanism includes a central flow channel opened at the bottom of the central sealing body, and the central flow channel is connected to multiple water spray holes. A one-way valve is provided in the water spray hole, and a water supply pipe is inserted at the bottom of the central flow channel. The water supply pipe passes through the bottom of the rotating disk and is connected to a solenoid valve. A bracket is fixedly connected between the water supply pipe and the outer cylinder anode.
[0018] By adopting the above technical solution, after the treatment is completed, when it is necessary to rinse the outer cylinder anode and the rotating hollow cylinder cathode, the solenoid valve is opened to supply external clean water into the water supply pipe. Then, after entering the central flow channel, the water is sprayed out through the spray hole and the one-way valve, which can rinse and clean the rotating hollow cylinder cathode and the outer cylinder anode. In addition, the spray hole can move up and down and rotate with the rotating hollow cylinder cathode, making the rinsing efficiency higher and the effect better.
[0019] Preferably, the side wall of the outer cylinder anode is provided with a vibration mechanism. The vibration mechanism includes a fixed ring fixedly connected to the side wall of the outer cylinder anode, and multiple arrayed rubber rods are inserted into the side wall of the fixed ring. The ends of the rubber rods are fixedly connected to a connecting plate, and the side wall of the outer cylinder anode is connected to a lifting ring through a lifting assembly. The top of the lifting ring is rotatably connected to multiple connecting rods, and the other end of the connecting rods is rotatably connected to the end of the connecting plate.
[0020] By adopting the above technical solution, the lifting ring is driven to move up and down repeatedly by the lifting assembly. When the lifting ring moves upward, it can push the rubber rod to move through the connecting rod and knock and vibrate the side wall of the outer cylinder anode. When the lifting ring moves downward, it can drive the rubber rod to move away from the outer cylinder anode and reset through the connecting rod. By repeating this process, the rubber rod can knock and vibrate the outer wall of the outer cylinder anode, shaking off the mud, scale and deposits attached to the inner wall of the outer cylinder anode.
[0021] Preferably, the lifting assembly includes a support plate fixedly connected to the side wall of the outer cylinder anode, and a second spring telescopic rod is connected between the lifting ring and the support plate. A fixed box is fixedly inserted into the side wall of the water inlet pipe, and an impeller is rotatably connected to the fixed box through a rotating rod. A cam is fixedly connected to the end of the rotating rod, and a push rod is fixedly connected to the bottom of the lifting ring. A push block is fixedly connected to the lower end of the push rod, and the push block slides on the side wall of the cam.
[0022] By adopting the above technical solution, when wastewater enters the inlet pipe, it can enter the impeller and impact the surface of the impeller, causing the impeller to rotate. When the impeller rotates, it can drive the cam to rotate through the rotating rod. When the tip of the cam abuts against the bottom of the push block, it can push the lifting ring to move upward through the push rod. The second spring telescopic rod is stretched. When the tip of the cam passes the bottom of the push block, the lifting ring can move downward to reset under the action of the second spring telescopic rod. By repeating this process, the lifting ring can move up and down back and forth.
[0023] A method for treating heavy metal wastewater, using the aforementioned heavy metal wastewater treatment device, includes the following steps:
[0024] S1: When electrochemically treating heavy metal wastewater, the wastewater is supplied into the annular hood through the inlet pipe. Then, it enters the annular flow channel between the outer cylinder anode and the rotating hollow cylindrical cathode through the inlet hole. At the same time, the outer cylinder anode and the rotating hollow cylindrical cathode are energized, which can electrochemically treat the wastewater entering the annular flow channel. The wastewater can enter the annular gap through the rotating hollow cylindrical cathode, which can increase the reaction area of the cathode and thus improve the reaction efficiency. The treated wastewater is discharged through the outlet pipe.
[0025] S2: Simultaneously, the motor is started. The rotation of the motor drives the spline sleeve to rotate, which in turn drives the rotating hollow cylindrical cathode and the central sealing body to rotate via the spline shaft. When the rotating hollow cylindrical cathode rotates, it drives the spiral blades to rotate, allowing the wastewater entering the annular flow channel to be spirally transported along the spiral flow channel formed by the spiral blades. This increases the travel distance of the wastewater flow, improving the treatment effect and quality. Furthermore, the centrifugal force generated by the rotation of the hollow cylindrical cathode will "shake off" the metal hydroxide, sludge, and other deposits on the electrode surface, carrying them away with the water flow and preventing the formation of a dense scale layer. The hollow structure increases the specific surface area, and the rotation agitates the surrounding water flow, actively "pushing" heavy metal ions to the electrode surface, significantly improving the mass transfer efficiency. When the central sealing body rotates, it drives the partition to rotate. The internal partition blocks the straight-through gap, forcing water to pass out through the hollow holes and enter the spiral flow channel, improving the treatment efficiency and quality.
[0026] S3: When the spline shaft rotates, it drives the first ring and the push plate to rotate. When the roller slides along the inclined plane to the bottom of the push plate, it pushes the first ring to move upward, compressing the first spring telescopic rod. At the same time, the spline shaft drives the rotating hollow cylindrical cathode to move upward. When the roller passes the push plate, the first ring can move downward and reset under the action of the first spring telescopic rod, and drive the central sealing body to move downward and reset through the spline shaft. This reciprocating motion allows the rotating hollow cylindrical cathode to move up and down, creating a shaking effect that facilitates the removal of deposits. Furthermore, when the rotating hollow cylindrical cathode moves up and down, it drives the spiral blades to move up and down along the side wall of the outer cylinder anode, scraping the surface of the outer cylinder anode to ensure that the inner wall of the outer cylinder anode is free of scale and mud. At the same time, it strengthens the turbulence of the sewage flow in the annular channel, significantly improving the electrolysis efficiency.
[0027] S4: When the rotating hollow cylindrical cathode rotates, it can drive the rotating disk to rotate through the connecting rod, which in turn drives the water inlet hole to rotate. This can achieve 360° uniform water distribution and enhance the initial reaction disturbance. At the same time, it can scrape the bottom sediment and prevent the bottom mud dead zone. It does not require additional power, thus improving the efficiency and effect of treatment.
[0028] S5: When wastewater enters the inlet pipe, it enters the impeller and impacts the impeller surface, causing the impeller to rotate. When the impeller rotates, it drives the cam to rotate via the rotating rod. When the tip of the cam abuts against the bottom of the push block, it pushes the lifting ring upward via the push rod, and the second spring telescopic rod is stretched. When the tip of the cam passes the bottom of the push block, the lifting ring moves downward to reset under the action of the second spring telescopic rod. This process is repeated to make the lifting ring move up and down.
[0029] S6: When the lifting ring moves upward, it can push the rubber rod to move through the connecting rod and knock and vibrate the side wall of the outer cylinder anode. When the lifting ring moves downward, it can drive the rubber rod to move away from the outer cylinder anode and reset through the connecting rod. By repeating this process, the rubber rod can knock and vibrate the outer wall of the outer cylinder anode, shaking off the mud, scale and deposits attached to the inner wall of the outer cylinder anode.
[0030] S7: After the treatment is completed, when it is necessary to rinse the outer cylinder anode and the rotating hollow cylinder cathode, open the solenoid valve to supply external clean water into the water supply pipe. Then, after entering the central flow channel, it is sprayed out through the water spray hole and the one-way valve, which can rinse and clean the rotating hollow cylinder cathode and the outer cylinder anode. In addition, the water spray hole can move up and down and rotate with the rotating hollow cylinder cathode, making the rinsing efficiency higher and the effect better.
[0031] In summary:
[0032] Advantage 1: Through the synergistic structure of rotating hollow cylindrical cathode, central sealing body, baffle and spiral blades, the short circuit of water flow is blocked from the source and dead water zone is eliminated. The wastewater is forced to fully react along the spiral flow channel, which greatly improves the heavy metal removal efficiency and the uniformity of electrolysis reaction.
[0033] Advantage 2: The centrifugal force generated by the rotation of the cathode, combined with the axial reciprocating motion, enables real-time self-cleaning of the electrode surface and the narrow gap between the electrodes. This effectively avoids the accumulation of deposits and blockages, as well as electrode passivation. It eliminates the need for frequent shutdowns for cleaning, ensuring long-term continuous and stable operation of the device and improving the efficiency and quality of wastewater treatment. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0035] Figure 2 This is a schematic diagram of the overall structure from another perspective of the present invention;
[0036] Figure 3 This is a partial cross-sectional view of the outer cylinder anode in this invention;
[0037] Figure 4 This is a partial cross-sectional view of the rotating hollow cylindrical cathode in this invention.
[0038] Figure 5 This is a cross-sectional view of the rotating hollow cylindrical cathode and the central sealing body in this invention;
[0039] Figure 6 This is a schematic diagram of the vibration mechanism in this invention;
[0040] Figure 7 This is a schematic diagram of the lifting mechanism in this invention;
[0041] Figure 8 This is a schematic diagram of the rotating component in this invention.
[0042] In the diagram: 1. Outer cylinder anode; 201. Splined shaft; 202. Splined sleeve; 203. U-shaped frame; 204. Motor; 301. First ring; 302. Push plate; 303. Inclined surface; 304. Roller; 401. Second ring; 402. First spring telescopic rod; 501. Rotating disk; 502. Water inlet; 503. Connecting rod; 504. Connecting block; 505. Annular cover; 506. Water inlet pipe; 601. Support frame; 602. Rotating shaft; 701. Water spray hole; 702. One-way valve; 703. 704. Central flow channel; 705. Water supply pipe; 706. Support; 707. Solenoid valve; 808. Fixing ring; 809. Rubber rod; 8000. Lifting ring; 8001. Connecting plate; 8002. Connecting rod; 901. Support plate; 902. Second spring telescopic rod; 903. Push rod; 904. Push block; 905. Fixing box; 906. Rotating rod; 907. Impeller; 908. Cam; 10. Water outlet pipe; 11. Rotating hollow cylindrical cathode; 12. Central sealing body; 13. Spiral blade; 14. Partition plate. Detailed Implementation
[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0044] Example 1
[0045] Please see Figures 1-8The diagram illustrates a heavy metal wastewater treatment device, including an outer cylindrical anode 1. The outer cylindrical anode 1 is a fixed cylindrical conductive shell made of corrosion-resistant, highly conductive titanium-based coating, stainless steel, or graphite conductive material. It serves as the positive electrode of the external power supply for the electrochemical reaction. The outer cylindrical anode 1 is a cylindrical conductive shell; the side walls of the shell are conductive and participate in the electrolysis reaction. The top and bottom are insulated and sealed, not participating in the conduction. This design ensures that the electric field is concentrated within the annular flow channel, improving current efficiency, while also avoiding interference with the top transmission mechanism and bottom... The water inlet mechanism is energized, enhancing the safety and reliability of the device operation. The inner wall of the outer cylinder anode 1 is smooth and coaxially arranged with the rotating hollow cylindrical cathode 11, forming a uniform and sealed annular flow channel between them, providing a stable electric field space for wastewater electrolysis. The rotating hollow cylindrical cathode 11 has a cylindrical porous structure with several uniformly distributed water passage holes / hollow holes on the cylinder wall, serving as the negative electrode of the external power supply for the electrolysis cathode. The rotating hollow cylindrical cathode 11 is made of stainless steel, titanium, or other inert cathode materials, possessing good conductivity and corrosion resistance. Its hollow structure can significantly increase the specific surface area of the electrode, allowing wastewater to pass through the cylinder wall and enter the inner annular gap, realizing simultaneous electrolysis reaction on both the inner and outer walls of the cathode, significantly improving the heavy metal treatment capacity and reaction efficiency. A rotating hollow cylindrical cathode 11 is rotatably connected inside the outer cylinder anode 1 via a rotating mechanism, and an annular flow channel is formed between the rotating hollow cylindrical cathode 11 and the outer cylinder anode 1. A central sealing body 12 is fixedly connected inside the rotating hollow cylindrical cathode 11, and a central sealing body 12 and the rotating hollow cylindrical cathode 11 form a... A ring-shaped gap is formed, and a spiral blade 13 is arranged inside the ring-shaped flow channel. The spiral blade 13 is fixedly sleeved on the side wall of the rotating hollow cylindrical cathode 11 and contacts the anode outer cylinder anode 1. Multiple baffles 14 are arranged inside the ring-shaped gap, and the baffles 14 are fixed to the side wall of the central sealing body 12. A water inlet mechanism is provided at the bottom of the outer cylinder anode 1, and a water outlet pipe 10 is connected to the top of the outer cylinder anode 1. A lifting mechanism for driving the rotating hollow cylindrical cathode 11 to rise and fall is provided at the top of the outer cylinder anode 1. The synergistic structure of the central sealing body 12, the baffle 14, and the spiral blades 13 fundamentally blocks water flow short circuits and eliminates dead water zones, forcing wastewater to fully react along the spiral flow channel, significantly improving the efficiency of heavy metal removal and the uniformity of electrolysis reaction; the centrifugal force generated by the rotation of the cathode, combined with the axial reciprocating motion, achieves real-time self-cleaning of the electrode surface and the narrow gap between the electrodes, effectively avoiding deposit scaling and blockage and electrode passivation, eliminating the need for frequent shutdowns for cleaning, ensuring long-term continuous and stable operation of the device, and improving the efficiency and quality of wastewater treatment.
[0046] The rotating mechanism includes a splined shaft 201 that passes through the top of the outer cylinder anode 1, with the lower end of the splined shaft 201 fixed to the top of the rotating hollow cylindrical cathode 11. A U-shaped frame 203 is fixedly connected to the top of the outer cylinder anode 1, and a motor 204 is fixedly connected to the top of the U-shaped frame 203. A splined sleeve 202 is fixedly connected to the output end of the motor 204, and the splined sleeve 202 is fitted onto the side wall of the splined shaft 201. When the motor 204 is started, its rotation drives the splined sleeve 202 to rotate, which in turn drives the rotating hollow cylindrical cathode 11 and the central sealing body 12 to rotate via the splined shaft 201. When the rotating hollow cylindrical cathode 11 rotates, it drives the spiral blades 13 to rotate, causing the annular flow to enter. Wastewater within the channel can be spirally transported through the spiral flow channel formed by the spiral blades 13, which can increase the flow path of wastewater and improve the treatment effect and quality. Furthermore, the centrifugal force generated by the rotation of the hollow cylindrical cathode 11 will "shake off" the metal hydroxide, sludge and other deposits on the electrode surface, allowing them to be carried away with the water flow, thus preventing the formation of a dense scale layer. The hollow structure increases the specific surface area, and at the same time, the rotation agitates the surrounding water flow, actively "pushing" heavy metal ions to the electrode surface, greatly improving the mass transfer efficiency. When the central sealing body 12 rotates, it can drive the baffle 14 to rotate. The internal baffle 14 blocks the straight-through gap, forcing water to pass out through the hollow holes and enter the spiral flow channel, improving the treatment efficiency and quality.
[0047] The lifting mechanism includes a first ring 301 fixedly sleeved on the side wall of the splined shaft 201, and a reset mechanism is provided between the first ring 301 and the splined sleeve 202. Multiple arc-shaped push plates 302 are fixedly connected to the bottom of the first ring 301, and the side walls of the push plates 302 are provided with inclined surfaces 303. Multiple rollers 304 are rotatably connected to the top of the outer cylinder anode 1 via a rotating assembly. The rollers 304 can roll along the inclined surfaces 303 and the bottom of the push plates 302. When the splined shaft 201 rotates, it drives the first ring 301 and the push plates 302 to rotate. When the rollers 304 slide along the inclined surfaces 303 to the bottom of the push plates 302, they can push the first ring... When roller 304 moves upward, it moves downward and resets under the action of the reset mechanism. It also drives the central sealing body 12 to move downward and reset through the spline shaft 201. This reciprocating motion allows the rotating hollow cylindrical cathode 11 to move up and down, creating a shaking effect that facilitates the removal of adhering substances. Furthermore, when the rotating hollow cylindrical cathode 11 moves up and down, it drives the spiral blades 13 to move up and down along the side wall of the outer cylinder anode 1, which can scrape the surface of the outer cylinder anode 1, ensuring that the inner wall of the outer cylinder anode 1 is free from scale and mud. At the same time, it makes the sewage flow in the annular channel more turbulent, and the electrolysis efficiency is greatly improved.
[0048] The reset mechanism includes a second ring 401 fixedly sleeved on the side wall of the spline sleeve 202, and a first spring telescopic rod 402 is fixedly connected between the second ring 401 and the first ring 301, which plays a reset role for the spline shaft 201 and the rotating hollow cylindrical cathode 11.
[0049] The rotating assembly includes multiple support frames 601 fixedly connected, and the roller 304 is rotatably connected to the side wall of the support frame 601 via a rotating shaft 602 to ensure the normal rolling of the roller 304.
[0050] The water inlet mechanism includes a rotating disk 501 rotatably connected to the bottom of the outer cylinder anode 1, with a water inlet hole 502 penetrating through the top of the rotating disk 501. An annular cover 505 is fixedly connected to the bottom of the outer cylinder anode 1 via a connecting block 504, and the rotating disk 501 is rotatably connected to the top of the annular cover 505. The water inlet hole 502 communicates with the annular cover 505, and a water inlet pipe 506 communicates with the bottom of the annular cover 505. Two symmetrically arranged connecting rods 503 are fixedly connected to the bottom of the rotating hollow cylindrical cathode 11, and the rotating disk 501 is sleeved on the side wall of the connecting rods 503. When wastewater undergoes electrochemical treatment, the wastewater is supplied into the annular cover 505 through the inlet pipe 506. Then, it enters the annular flow channel between the outer cylinder anode 1 and the rotating hollow cylindrical cathode 11 through the inlet hole 502. When the rotating hollow cylindrical cathode 11 rotates, it can drive the rotating disk 501 to rotate through the connecting rod 503, which in turn drives the inlet hole 502 to rotate. This can achieve 360° uniform water distribution, enhance the initial reaction disturbance, and at the same time, it can scrape the bottom sediment and prevent the bottom sludge dead zone. Moreover, no additional power is required, which improves the efficiency and effect of treatment.
[0051] The side wall of the central sealing body 12 is provided with a flushing mechanism, which includes a central flow channel 703 opened at the bottom of the central sealing body 12, and the central flow channel 703 is connected to multiple water spray holes 701. A one-way valve 702 is installed in each water spray hole 701, and a water supply pipe 704 is inserted into the bottom of the central flow channel 703. The water supply pipe 704 passes through the bottom of the rotating disk 501 and is connected to a solenoid valve 706. A bracket 705 is fixedly connected between the water supply pipe 704 and the outer cylinder anode 1. After the treatment is completed, when it is necessary to rinse the outer cylinder anode 1 and the rotating hollow cylindrical cathode 11, the solenoid valve 706 is opened to supply external cleaning water into the water supply pipe 704. Then, after entering the central flow channel 703, the water is sprayed out through the spray hole 701 and the one-way valve 702, which can rinse and clean the rotating hollow cylindrical cathode 11 and the outer cylinder anode 1. Furthermore, the spray hole 701 can move up and down and rotate with the rotating hollow cylindrical cathode 11, making the rinsing efficiency higher and the effect better.
[0052] A vibration mechanism is provided on the side wall of the outer cylinder anode 1. The vibration mechanism includes a fixing ring 801 fixedly connected to the side wall of the outer cylinder anode 1, and multiple arrayed rubber rods 802 are inserted into the side wall of the fixing ring 801. The ends of the rubber rods 802 are fixedly connected to the connecting discs 804. A lifting ring 803 is connected to the side wall of the outer cylinder anode 1 through a lifting assembly. Multiple connecting rods 805 are rotatably connected to the top of the lifting ring 803, and the other ends of the connecting rods 805 are rotatably connected to the ends of the connecting discs 804. The lifting ring 803 moves up and down repeatedly. When the lifting ring 803 moves upward, it can push the rubber rod 802 to move through the connecting rod 805 and knock and vibrate the side wall of the outer cylinder anode 1. When the lifting ring 803 moves downward, it can drive the rubber rod 802 to move away from the outer cylinder anode 1 and reset through the connecting rod 805. By repeating this process, the rubber rod 802 can knock and vibrate the outer wall of the outer cylinder anode 1, shaking off the mud, scale and deposits attached to the inner wall of the outer cylinder anode 1.
[0053] The lifting assembly includes a support plate 901 fixedly connected to the side wall of the outer cylinder anode 1, and a second spring telescopic rod 902 connected between the lifting ring 803 and the support plate 901. A fixed box 905 is fixedly inserted into the side wall of the water inlet pipe 506, and an impeller 907 is rotatably connected to the fixed box 905 via a rotating rod 906. A cam 908 is fixedly connected to the end of the rotating rod 906, and a push rod 903 is fixedly connected to the bottom of the lifting ring 803. A push block 904 is fixedly connected to the lower end of the push rod 903, and the push block 904 slides on the side wall of the cam 908. When wastewater enters the water inlet pipe 506, it can... The material enters the impeller 907 and impacts its surface, causing the impeller 907 to rotate. When the impeller 907 rotates, it drives the cam 908 to rotate via the rotating rod 906. When the tip of the cam 908 abuts against the bottom of the push block 904, it pushes the lifting ring 803 upward via the push rod 903, stretching the second spring telescopic rod 902. When the tip of the cam 908 passes the bottom of the push block 904, the lifting ring 803 moves downward to reset under the action of the second spring telescopic rod 902. This process repeats, allowing the lifting ring 803 to move up and down repeatedly.
[0054] A method for treating heavy metal wastewater, using a heavy metal wastewater treatment device, includes the following steps:
[0055] S1: When electrochemically treating heavy metal wastewater, the wastewater is supplied into the annular cover 505 through the inlet pipe 506, and then enters the annular flow channel between the outer cylinder anode 1 and the rotating hollow cylindrical cathode 11 through the inlet hole 502. At the same time, the outer cylinder anode 1 and the rotating hollow cylindrical cathode 11 are energized, which can electrochemically treat the wastewater entering the annular flow channel. The wastewater can enter the annular gap through the rotating hollow cylindrical cathode 11, which can increase the reaction area of the cathode and thus improve the reaction efficiency. The treated wastewater is discharged through the outlet pipe 10.
[0056] S2: Simultaneously, the motor 204 is started. The rotation of the motor 204 drives the spline sleeve 202 to rotate, and through the spline shaft 201, it drives the rotating hollow cylindrical cathode 11 and the central sealing body 12 to rotate. When the rotating hollow cylindrical cathode 11 rotates, it drives the spiral blades 13 to rotate, so that the wastewater entering the annular flow channel can be spirally transported by the spiral flow channel formed by the spiral blades 13. This can increase the flow path of the wastewater and improve the treatment effect and quality. In addition, the centrifugal force generated by the rotation of the rotating hollow cylindrical cathode 11 will "shake off" the metal hydroxide, sludge and other attachments deposited on the electrode surface, and carry them away with the water flow to avoid the formation of a dense scale layer. The hollow structure increases the specific surface area, and at the same time, the rotation agitates the surrounding water flow, actively "pushing" heavy metal ions to the electrode surface, which greatly improves the mass transfer efficiency. When the central sealing body 12 rotates, it can drive the partition 14 to rotate. The internal partition 14 blocks the straight gap, forcing the water to pass out of the hollow hole and enter the spiral flow channel, improving the treatment efficiency and quality.
[0057] S3: When the spline shaft 201 rotates, it drives the first ring 301 and the push plate 302 to rotate. When the roller 304 slides along the inclined plane 303 to the bottom of the push plate 302, it pushes the first ring 301 to move upward, compressing the first spring telescopic rod 402. At the same time, the spline shaft 201 drives the rotating hollow cylindrical cathode 11 to move upward. When the roller 304 passes the push plate 302, the first ring 301 can move downward and reset under the action of the first spring telescopic rod 402, and then move upward through the spline shaft 201. The key shaft 201 drives the central sealing body 12 to move downwards and reset. This reciprocating motion allows the rotating hollow cylindrical cathode 11 to move up and down, creating a shaking effect that facilitates the removal of deposits. Furthermore, as the rotating hollow cylindrical cathode 11 moves up and down, it drives the spiral blades 13 to move up and down along the side wall of the outer cylinder anode 1, which can scrape the surface of the outer cylinder anode 1, ensuring that the inner wall of the outer cylinder anode 1 is free from scale and mud. At the same time, it strengthens the turbulence of the sewage flow in the annular channel, significantly improving the electrolysis efficiency.
[0058] S4: When the rotating hollow cylindrical cathode 11 rotates, it can drive the rotating disk 501 to rotate through the connecting rod 503, which in turn drives the water inlet hole 502 to rotate. This can achieve 360° uniform water distribution and enhance the initial reaction disturbance. At the same time, it can scrape the bottom sediment and prevent the bottom mud dead zone. It does not require additional power, thus improving the efficiency and effect of treatment.
[0059] S5: When wastewater enters the inlet pipe 506, it can enter the impeller 907 and impact the surface of the impeller 907, causing the impeller 907 to rotate. When the impeller 907 rotates, it can drive the cam 908 to rotate through the rotating rod 906. When the tip of the cam 908 abuts against the bottom of the push block 904, it can push the lifting ring 803 to move upward through the push rod 903. The second spring telescopic rod 902 is stretched. When the tip of the cam 908 passes the bottom of the push block 904, the lifting ring 803 can move downward to reset under the action of the second spring telescopic rod 902. This process is repeated to make the lifting ring 803 move up and down repeatedly.
[0060] S6: When the lifting ring 803 moves upward, it can push the rubber rod 802 to move through the connecting rod 805 and knock and vibrate the side wall of the outer cylinder anode 1. When the lifting ring 803 moves downward, it can drive the rubber rod 802 to move away from the outer cylinder anode 1 and reset through the connecting rod 805. By repeating this process, the rubber rod 802 can knock and vibrate the outer wall of the outer cylinder anode 1, shaking off the mud, scale and deposits attached to the inner wall of the outer cylinder anode 1.
[0061] S7: After the treatment is completed, when it is necessary to rinse the outer cylinder anode 1 and the rotating hollow cylindrical cathode 11, open the solenoid valve 706 to supply external cleaning water into the water supply pipe 704. Then, after entering the central flow channel 703, the water is sprayed out through the spray hole 701 and the one-way valve 702, which can rinse and clean the rotating hollow cylindrical cathode 11 and the outer cylinder anode 1. Furthermore, the spray hole 701 can move up and down and rotate with the rotating hollow cylindrical cathode 11, making the rinsing efficiency higher and the effect better.
[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0063] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A heavy metal wastewater treatment device, comprising an outer cylinder anode (1), characterized in that, The outer cylinder anode (1) is rotatably connected to a rotating hollow cylindrical cathode (11) via a rotating mechanism, and an annular flow channel is formed between the rotating hollow cylindrical cathode (11) and the outer cylinder anode (1). A central sealing body (12) is fixedly connected inside the rotating hollow cylindrical cathode (11), and an annular gap is formed between the central sealing body (12) and the rotating hollow cylindrical cathode (11). A spiral blade (13) is provided inside the annular flow channel, and the spiral blade (13) is fixedly sleeved on the side wall of the rotating hollow cylindrical cathode (11) and in contact with the outer cylinder anode (1). Multiple partitions (14) are provided inside the annular gap, and the partitions (14) are fixed to the side wall of the central sealing body (12). A water inlet mechanism is provided at the bottom of the outer cylinder anode (1), and a water outlet pipe (10) is connected to the top of the outer cylinder anode (1). A lifting mechanism for driving the rotating hollow cylindrical cathode (11) to rise and fall is provided at the top of the outer cylinder anode (1).
2. The heavy metal wastewater treatment device according to claim 1, characterized in that: The rotating mechanism includes a spline shaft (201) that passes through the top of the outer cylinder anode (1), and the lower end of the spline shaft (201) is fixed to the top of the rotating hollow cylindrical cathode (11). A U-shaped frame (203) is fixedly connected to the top of the outer cylinder anode (1), and a motor (204) is fixedly connected to the top of the U-shaped frame (203). A spline sleeve (202) is fixedly connected to the output end of the motor (204), and the spline sleeve (202) is sleeved on the side wall of the spline shaft (201).
3. The heavy metal wastewater treatment device according to claim 2, characterized in that: The lifting mechanism includes a first ring (301) fixedly sleeved on the side wall of the spline shaft (201), and a reset mechanism is provided between the first ring (301) and the spline sleeve (202). A plurality of arc-shaped push plates (302) are fixedly connected to the bottom of the first ring (301), and the side wall of the push plate (302) is provided with an inclined surface (303). A plurality of rollers (304) are rotatably connected to the top of the outer cylinder anode (1) through a rotating assembly, and the rollers (304) can roll along the inclined surface (303) and the bottom of the push plate (302).
4. The heavy metal wastewater treatment device according to claim 3, characterized in that: The reset mechanism includes a second ring (401) fixedly sleeved on the side wall of the spline sleeve (202), and a first spring telescopic rod (402) is fixedly connected between the second ring (401) and the first ring (301).
5. The heavy metal wastewater treatment device according to claim 4, characterized in that: The rotating assembly includes multiple support frames (601) fixedly connected, and the roller (304) is rotatably connected to the side wall of the support frame (601) via a rotating shaft (602).
6. The heavy metal wastewater treatment device according to claim 5, characterized in that: The water inlet mechanism includes a rotating disk (501) rotatably connected to the bottom of the outer cylinder anode (1), and a water inlet hole (502) is provided through the top of the rotating disk (501). The bottom of the outer cylinder anode (1) is fixedly connected to an annular cover (505) through a connecting block (504), and the rotating disk (501) is rotatably connected to the top of the annular cover (505). The water inlet hole (502) is connected to the annular cover (505), and the bottom of the annular cover (505) is connected to a water inlet pipe (506). The bottom of the rotating hollow cylindrical cathode (11) is fixedly connected to two symmetrically arranged connecting rods (503), and the rotating disk (501) is sleeved on the side wall of the connecting rod (503).
7. The heavy metal wastewater treatment device according to claim 6, characterized in that: The side wall of the central sealing body (12) is provided with a flushing mechanism. The flushing mechanism includes a central flow channel (703) opened at the bottom of the central sealing body (12), and the central flow channel (703) is connected to a plurality of water spray holes (701). A one-way valve (702) is provided in the water spray hole (701), and a water supply pipe (704) is inserted at the bottom of the central flow channel (703). The water supply pipe (704) passes through the bottom of the rotating disk (501) and is connected to a solenoid valve (706). A bracket (705) is fixedly connected between the water supply pipe (704) and the outer cylinder anode (1).
8. The heavy metal wastewater treatment device according to claim 7, characterized in that: The outer cylinder anode (1) is provided with a vibration mechanism on its side wall. The vibration mechanism includes a fixed ring (801) fixedly connected to the side wall of the outer cylinder anode (1). Multiple arrayed rubber rods (802) are inserted into the side wall of the fixed ring (801). A connecting plate (804) is fixedly connected to the end of the rubber rod (802). A lifting ring (803) is connected to the side wall of the outer cylinder anode (1) through a lifting assembly. Multiple connecting rods (805) are rotatably connected to the top of the lifting ring (803). The other end of the connecting rod (805) is rotatably connected to the end of the connecting plate (804).
9. A heavy metal wastewater treatment device according to claim 8, characterized in that: The lifting assembly includes a support plate (901) fixedly connected to the side wall of the outer cylinder anode (1), and a second spring telescopic rod (902) is connected between the lifting ring (803) and the support plate (901). A fixed box (905) is fixedly inserted into the side wall of the water inlet pipe (506), and an impeller (907) is rotatably connected inside the fixed box (905) via a rotating rod (906). A cam (908) is fixedly connected to the end of the rotating rod (906), and a push rod (903) is fixedly connected to the bottom of the lifting ring (803). A push block (904) is fixedly connected to the lower end of the push rod (903), and the push block (904) slides on the side wall of the cam (908).
10. A method for treating heavy metal wastewater, using the heavy metal wastewater treatment device as described in any one of claims 1-9, characterized in that: Includes the following steps: S1: When electrochemically treating heavy metal wastewater, the wastewater is supplied into the annular cover (505) through the inlet pipe (506), and then enters the annular flow channel between the outer cylinder anode (1) and the rotating hollow cylindrical cathode (11) through the inlet hole (502). At the same time, the outer cylinder anode (1) and the rotating hollow cylindrical cathode (11) are energized, which can electrochemically treat the wastewater entering the annular flow channel. The wastewater can enter the annular gap through the rotating hollow cylindrical cathode (11), which can increase the reaction area of the cathode and thus improve the reaction efficiency. S2: At the same time, the motor (204) is started. The rotation of the motor (204) drives the spline sleeve (202) to rotate, and drives the rotating hollow cylindrical cathode (11) and the central sealing body (12) to rotate through the spline shaft (201). When the rotating hollow cylindrical cathode (11) rotates, it can drive the spiral blade (13) to rotate, so that the wastewater entering the annular flow channel can be spirally transported with the spiral flow channel formed by the spiral blade (13). When the central sealing body (12) rotates, it can drive the partition (14) to rotate. The internal partition (14) blocks the straight gap and forces the water to pass out of the hollow hole and enter the spiral flow channel. S3: When the spline shaft (201) rotates, it can drive the first ring (301) and the push plate (302) to rotate. When the roller (304) slides along the inclined plane (303) to the bottom of the push plate (302), it can push the first ring (301) to move upward. The first spring telescopic rod (402) is compressed. At the same time, the spline shaft (201) drives the rotating hollow cylindrical cathode (11) to move upward. When the roller (304) passes the push plate (302), the first ring (301) can move downward and reset under the action of the first spring telescopic rod (402). It can also drive the central sealing body (12) to move downward and reset through the spline shaft (201). By repeating this process, the rotating hollow cylindrical cathode (11) can move up and down. When the rotating hollow cylindrical cathode (11) moves up and down, it can drive the spiral blade (13) to move up and down along the side wall of the outer cylinder anode (1). S4: When the rotating hollow cylindrical cathode (11) rotates, it can drive the rotating disk (501) to rotate through the connecting rod (503), and then drive the water inlet hole (502) to rotate, so as to achieve 360° uniform water distribution and enhance the initial reaction disturbance. S5: When wastewater enters the inlet pipe (506), it can enter the impeller (907) and impact the surface of the impeller (907), causing the impeller (907) to rotate. When the impeller (907) rotates, it can drive the cam (908) to rotate through the rotating rod (906). When the tip of the cam (908) abuts against the bottom of the push block (904), it can push the lifting ring (803) to move upward through the push rod (903). The second spring telescopic rod (902) is stretched. When the tip of the cam (908) passes the bottom of the push block (904), the lifting ring (803) can move downward and reset under the action of the second spring telescopic rod (902). By repeating this process, the lifting ring (803) can move up and down repeatedly. S6: When the lifting ring (803) moves upward, it can push the rubber rod (802) to move through the connecting rod (805) and knock and vibrate the side wall of the outer cylinder anode (1). When the lifting ring (803) moves downward, it can drive the rubber rod (802) to move away from the outer cylinder anode (1) and reset through the connecting rod (805). By repeating this process, the rubber rod (802) can knock and vibrate the outer wall of the outer cylinder anode (1) repeatedly. S7: After the processing is completed, when it is necessary to rinse the outer cylinder anode (1) and the rotating hollow cylinder cathode (11), open the solenoid valve (706) to supply external clean water into the water supply pipe (704). Then, after entering the central flow channel (703), it is sprayed out through the spray hole (701) and the one-way valve (702) to rinse and clean the rotating hollow cylinder cathode (11) and the outer cylinder anode (1). In addition, the spray hole (701) can move up and down and rotate with the rotating hollow cylinder cathode (11).