A high-concentration COD treatment device for electroplating wastewater from an electroplating production line.

Abstract

This invention belongs to the field of wastewater treatment technology, specifically a high-concentration COD treatment device for electroplating production line wastewater. It includes a base plate, a solid biological tank fixedly installed on top of the base plate, connecting components on the solid biological tank, a biochemical tank fixedly installed on top of the base plate, an aeration mechanism inside the biochemical tank, an air supply mechanism for conveying air for aeration on the base plate, a reaction chamber fixedly installed on top of the base plate, and a frame inside the biochemical tank. This high-concentration COD treatment device for electroplating production line wastewater, through the solid biological tank and biochemical tank, facilitates the treatment of wastewater. As the water flows, it carries biological bacteria into the biochemical tank for reaction treatment. The increased number of biological bacteria can consume organic COD. High-concentration wastewater is continuously aerated and circulated daily, reducing resource waste.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically a high-concentration COD treatment device for electroplating wastewater from an electroplating production line. Background Technology

[0002] Electroplating wastewater from electroplating production lines typically contains high concentrations of COD. To protect the environment and meet emission standards, this high-COD wastewater must be effectively treated. Electroplating wastewater high-concentration COD treatment equipment is used to remove organic pollutants from the wastewater, reduce its chemical oxygen demand, meet national or local emission standards, prevent water pollution, decompose organic matter in the wastewater, reduce toxicity and color, and optimize subsequent discharge or reuse conditions. The treated wastewater can meet reuse standards for process cooling, rinsing, etc., reducing water costs and saving resources.

[0003] A Chinese patent (CN102531273A) discloses a device for treating ammonia nitrogen and COD in surface treatment wastewater, including an iron-carbon micro-electrolysis reactor, a dosing pump, a sedimentation tank, a hydrolysis acidification tank, and a membrane bioreactor. The iron-carbon micro-electrolysis reactor is used to process surface treatment wastewater, and the iron-carbon micro-electrolysis reaction is carried out at a pH of 2-4. After the reaction is complete, the dosing pump injects alkaline solution into the iron-carbon micro-electrolysis reactor to adjust the pH to be greater than or equal to 9, causing metal ions to precipitate. Through iron-carbon micro-electrolysis, metal ions that negatively impact biochemical treatment can be removed, while simultaneously improving the biodegradability of the wastewater. The sedimentation tank is connected to the output of the iron-carbon micro-electrolysis reactor; wastewater is fed into the sedimentation tank for solid-liquid separation, and the precipitate is discharged through a sludge discharge port. The hydrolysis acidification tank is connected to the sedimentation tank, and the supernatant from the sedimentation tank is input for hydrolysis acidification to further improve the biodegradability of the wastewater. The membrane bioreactor is connected to the hydrolysis acidification tank, and the hydrolyzed and acidified wastewater is input. The ammonia nitrogen and COD in the wastewater are removed by membrane bioreactor.

[0004] Existing high-concentration COD wastewater treatment equipment often generates a large amount of sludge during actual operation. Sludge is mainly formed by the decomposition and sedimentation of organic matter and is classified as hazardous waste. A large amount of sludge not only increases treatment costs but also poses serious environmental pollution risks.

[0005] Therefore, the present invention provides a high-concentration COD treatment device for electroplating wastewater from an electroplating production line. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the problem of inconvenient sludge treatment, this invention proposes a high-concentration COD treatment device for electroplating wastewater from an electroplating production line.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A high-concentration COD treatment device for electroplating wastewater from an electroplating production line, comprising a base plate, a mixing tank fixedly installed on the top of the base plate, a mixing mechanism for stirring and mixing water inside the mixing tank, a solid biological bacteria tank fixedly installed on the top of the base plate, a connecting assembly on the solid biological bacteria tank, and a biological treatment tank fixedly installed on the top of the base plate. The solid biological bacteria tank is connected to the mixing tank and the biological treatment tank respectively through the connecting assembly. An aeration mechanism for aeration is provided inside the biological treatment tank. The base plate is equipped with an air supply mechanism for conveying air for aeration. A reaction chamber is fixedly installed on the top of the base plate. A mixing component for mixing ozone is installed inside the reaction chamber. A frame is installed inside the biological tank. A flow channel is embedded inside the frame. Discharge channels are arranged in an array on the flow channel. A sealing box is installed inside the frame. A pumping mechanism is installed inside the sealing box. A diversion channel is installed inside the frame, and the diversion channel is symmetrically arranged with the flow channel. Spray holes are arranged in an array on the diversion channel. An adjustment mechanism for adjusting the position of the frame is installed inside the biological tank.

[0008] By adopting the above scheme, after the wastewater is added to the mixing tank, a reaction solution is added. The mixing mechanism then causes the solution to mix and react with the wastewater, adjusting the pH value of the wastewater. After the pH value is uniformly adjusted to -1, the adjusted pH value is transferred to the solid biological fermentation tank via connecting components. The bacteria produced in the solid biological fermentation tank are then introduced into the biological treatment tank. Through the cooperation of the air supply and aeration mechanisms, the liquid in the biological treatment tank is aerated. The increased bacteria can consume organic COD. High-concentration wastewater is continuously fed into and circulated in the biological treatment tank daily, effectively removing organic COD. The wastewater in the biological treatment tank is then discharged, and the discharged organic COD-laden wastewater enters the reaction tank for further chemical oxidation. After minutes, the COD can be reduced to below 1%. The mixing components allow ozone to quickly react with the wastewater. Rapid mixing and oxidation reactions can save costs by reducing the cost of acid flow from alkaline pretreatment (oil removal, wax removal, and acidification), the cost of adding chemicals for oxidation after acidification, the cost of adjusting alkali after oxidation, the cost of adding flocculants after alkali adjustment, the cost of sludge pressing after flocculation, the cost of sludge disposal, and the workload of wastewater treatment workers. The biological bacteria are not afraid of death; even after large-scale death, they can recover on their own within a day. Centralized treatment of this water prevents pollution of other water systems, allowing for effective treatment of other wastewater systems. Electroplating wastewater is guaranteed to reach its target standard. Water is continuously pumped into the biological bacteria circulation system and discharged back into the biological tank. Only pumping and aeration electricity costs are required; no other costs are necessary. High-concentration COD wastewater treatment requires no chemical addition; COD evaporates into the air through aeration. High-concentration COD wastewater treatment by biological bacteria does not produce sludge, reducing the amount of hazardous sludge generated, making it environmentally friendly and pollution-free.

[0009] Preferably, the adjustment mechanism includes a chute, a guide rod, a threaded rod, a servo motor, a guide block, a drive block, and a threaded ring. The chute is symmetrically arranged inside the biochemical tank. The guide rod is fixedly installed inside the corresponding chute. The threaded rod is rotatably arranged in the corresponding chute. The servo motor is fixedly installed at the top of the biochemical tank, and the output end of the servo motor is fixedly connected to one end of the corresponding threaded rod. The guide block is fixedly arranged on the frame, and the guide rod passes through the corresponding guide block. The drive block is fixedly arranged on the frame. The threaded ring is fixedly arranged inside the drive block. The threaded rod is threadedly connected to the corresponding threaded ring.

[0010] By adopting the above scheme, the servo motor will drive the threaded rod to rotate. When the threaded rod rotates, it will adjust the position of the drive block through the threaded ring. The drive block will drive the frame to move. When the frame moves, it will move smoothly through the cooperation of the guide rod and the guide block.

[0011] Preferably, the pumping mechanism includes a pumping pump, a pumping pipe, a dual-shaft motor, an exhaust fan, and an air supply pipe. The pumping pump is fixedly installed inside the sealed box. One end of the pumping pipe is connected to the input end of the pumping pump, and the other end of the pumping pipe is connected to the flow channel. The dual-shaft motor is fixedly installed inside the sealed box, and one output end of the dual-shaft motor is fixedly connected to the impeller inside the pumping pump. The exhaust fan is fixedly installed inside the sealed box, and the other dual-shaft motor is drivenly connected to the impeller inside the exhaust fan. One end of the air supply pipe is connected to the output end of the exhaust fan, and the other end of the air supply pipe is connected to the diversion channel. An air inlet pipe is provided on the top of the sealed box. A connecting pipe is connected to the output end of the pumping pump. A waste liquid tank is fixedly installed on the side of the biochemical tank, and the other end of the connecting pipe is connected to the waste liquid tank.

[0012] By adopting the above scheme, the operation of the dual-output shaft motor will drive the pump to move. The pump will extract water from the flow tank through the pumping pipe. The movement of the pump, in conjunction with the connecting pipe, will cause foam and waste liquid to flow into the waste liquid tank for storage. The operation of the dual-output shaft motor will also drive the exhaust fan to work. The exhaust fan will generate airflow through the air supply pipe, which will flow into the diversion tank. The airflow entering the diversion tank will flow through the spray holes to the foam on the surface of the liquid in the biological tank, and then cause the foam to flow into the discharge tank. With the help of the discharge tank, the foam can be treated.

[0013] Preferably, the mixing mechanism includes a power motor and a stirring shaft. The power motor is fixedly installed on the top of the mixing tank, and the stirring shaft is rotatably installed inside the mixing tank. One end of the stirring shaft is fixedly connected to the output end of the power motor, and a water inlet pipe is connected to the top of the mixing tank.

[0014] By adopting the above scheme, after the sewage enters the mixing tank, the reaction solution is added into the mixing tank, and the power motor is controlled to drive the stirring shaft to move. The movement of the stirring shaft can stir and mix the sewage inside the mixing tank, thereby allowing the sewage and solution to mix and react, and adjusting the pH value of the sewage.

[0015] Preferably, the connecting assembly includes a delivery pump and a water delivery pipe. The delivery pump is fixedly mounted on the mixing tank, and its input end is connected to the mixing tank. The output end of the delivery pump is connected to the solid biological bacteria tank through a pipe. One end of the water delivery pipe is connected to the solid biological bacteria tank, and the other end of the water delivery pipe is connected to the biochemical pool. A controller is fixedly installed on the top of the base plate.

[0016] By adopting the above scheme, the operation of the high-concentration COD treatment equipment for electroplating wastewater in the electroplating production line is controlled. The operation of the transfer pump can extract water from the mixing tank. The extracted water will enter the solid biological bacteria tank, where biological bacteria are cultivated. When the water flows, it will carry the biological bacteria into the biochemical pool for reaction treatment.

[0017] Preferably, the aeration mechanism includes a flow pipe and an aeration disc array, wherein the flow pipe is arranged around the inside of the biological tank, and the aeration disc array is arranged on the flow pipe.

[0018] By adopting the above scheme, the air delivered into the flow pipe will flow into the biological tank through the aeration disc, thus ensuring that oxygen is distributed more evenly in the biological tank, avoiding local hypoxia or hyperxia, which helps the metabolism of microorganisms, increases the degradation rate of organic matter, and facilitates the purification of sewage.

[0019] Preferably, the air supply mechanism includes a wind box, a filter plate, a blower, an air collection box, and a conveying pipe. The wind box is fixedly installed on the top of the base plate, the filter plate is fixedly installed on the top of the wind box, the blower is fixedly installed inside the wind box, the air collection box is fixedly installed inside the wind box, and the output end of the blower is connected to the air collection box. One end of the conveying pipe is connected to the air collection box, and the other end of the conveying pipe is connected to a corresponding flow pipe.

[0020] By adopting the above scheme, after the blower draws air into the air box, the air will flow into the air collection box through the delivery pipe, and into the flow pipe through the delivery pipe. The air will then flow evenly into the biological tank through the aeration disc to aerate the sewage inside the biological tank, facilitating the reaction and purification of the sewage by the biological bacteria.

[0021] Preferably, a water pump is fixedly installed on the top of the reaction tank, and the input end of the water pump is connected to the inside of the biochemical tank through a pipe. The output end of the water pump is connected to the reaction tank through a pipe. A drain pipe is provided on the reaction tank, and a solenoid valve is provided on the drain pipe.

[0022] By adopting the above scheme, the wastewater after the reaction inside the biological treatment tank can be extracted by the operation of the water pump. The extracted wastewater can flow into the reaction tank for oxidation reaction. After the oxidation reaction, the solenoid valve on the drain pipe is controlled to operate, and the treated water source will be discharged through the drain pipe.

[0023] Preferably, the mixing assembly includes a strip frame, a drive motor, pulleys, a cylinder, square troughs, nozzles, and a conveying assembly. The strip frame is fixedly mounted on the inner wall of the reaction chamber, the drive motor is fixedly mounted on the strip frame, the pulley array is rotatably mounted inside the strip frame, and adjacent pulleys are connected by belt drive. The output end of the drive motor is fixedly connected to the center position of one of the pulleys. One end of the cylinder is fixedly connected to the center position of the corresponding pulley. The square trough array is mounted on the cylinder and the square troughs are connected to the cylinder. The nozzle array is mounted on the square troughs, and the conveying assembly for conveying ozone is mounted on the reaction chamber.

[0024] By adopting the above scheme, ozone is generated and transported into the cylinder through the conveying component. The ozone enters the reaction chamber through the cooperation of the square groove and the nozzle. At the same time, the drive motor drives the pulley to move. When the pulley moves, it drives the cylinder and the square groove to move, which allows the ozone to enter the reaction chamber evenly for mixing and reaction. This oxidation reaction can reduce COD.

[0025] Preferably, the conveying assembly includes an ozone generator, a gas supply pipe, a positioning plate, a connector, and a rotary joint. The ozone generator is fixedly mounted on the top of the reaction chamber, the gas supply pipe is located inside the reaction chamber, the positioning plate is fixedly mounted on the gas supply pipe and is fixedly connected to the top wall of the reaction chamber by bolts, the connector is located on the gas supply pipe and is connected to the output end of the ozone generator through a pipe, and the rotary joint array is located on the gas supply pipe and is movably connected to the top of the cylinder.

[0026] By adopting the above scheme, the ozone generator produces ozone. The ozone enters the gas supply pipe through the connector, and the ozone flows into the cylinder through the rotary joint. The cylinder allows the ozone to be evenly mixed with the water source for oxidation treatment.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The present invention discloses a high-concentration COD treatment device for electroplating wastewater from an electroplating production line. Through the installation of a solid-state biological tank and a biochemical pool, the device facilitates the treatment of wastewater. The extracted water enters the solid-state biological tank, where microorganisms are cultivated. As the water flows, these microorganisms are carried into the biochemical pool for reaction. After the microorganisms from the solid-state biological tank enter the biochemical pool, a blower operates to draw air for aeration. Air is evenly distributed into the biochemical pool through an aeration disc, aerating the wastewater and facilitating the purification process by the microorganisms. The increased microorganisms can consume organic COD. The high-concentration wastewater undergoes continuous daily aeration and circulation in and out of the biochemical pool, effectively removing most of the organic COD. The wastewater is then discharged from the biochemical pool, thus reducing resource waste, decreasing the generation of hazardous sludge, and achieving environmental protection without pollution.

[0029] 2. The electroplating production line high-concentration COD treatment equipment of the present invention facilitates the treatment of foam generated during the reaction through the setting of a discharge tank and a pump. When treating and removing foam, the operation of the dual-output shaft motor drives the pump to move. The pump draws water from the flow tank through the pumping pipe. The movement of the pump, in conjunction with the connecting pipe, causes the foam and waste liquid to flow into the waste liquid tank for storage. The operation of the dual-output shaft motor drives the exhaust fan to work. The exhaust fan generates air force that flows through the air supply pipe into the diversion tank. The air force entering the diversion tank flows through the spray holes to the foam on the surface of the liquid in the biological tank, and then causes the foam to flow into the discharge tank. With the help of the discharge tank, the foam can be treated and removed, effectively avoiding excessive foam from affecting the reaction efficiency.

[0030] 3. The electroplating production line high-concentration COD treatment equipment for electroplating wastewater described in this invention facilitates rapid mixing and reaction of ozone and wastewater through the design of a cylindrical and square tank, thereby improving the efficiency of wastewater treatment. The ozone generator produces ozone, which enters the gas supply pipe through a connector. A rotary joint allows the ozone to flow into the cylindrical tank, and the square tank and nozzle allow the ozone to enter the reaction chamber. Simultaneously, a drive motor drives a pulley, which in turn moves the cylindrical and square tanks, ensuring that ozone is evenly distributed into the reaction chamber for mixing and oxidation treatment. This achieves cost savings and improves the efficiency of water treatment. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1This is a perspective view of the electroplating wastewater high-concentration COD treatment equipment of the electroplating production line of the present invention;

[0033] Figure 2 This is a schematic diagram of the biochemical pool structure in this invention;

[0034] Figure 3 This is a schematic diagram of the aeration disc structure in this invention;

[0035] Figure 4 This is a schematic diagram of the structure of the stirring shaft in this invention;

[0036] Figure 5 This is a schematic diagram of the cylindrical structure in this invention;

[0037] Figure 6 This is a schematic diagram of the structure of the bellows in this invention;

[0038] Figure 7 This is a schematic diagram of the frame structure in this invention;

[0039] Figure 8 This is a schematic diagram of the structure of the sealed box in this invention;

[0040] Figure 9 This is a schematic diagram of the flow divider in this invention.

[0041] In the diagram: 1. Base plate; 2. Mixing tank; 3. Inlet pipe; 4. Power motor; 5. Stirring shaft; 6. Transfer pump; 7. Solid biological tank; 8. Water delivery pipe; 9. Controller; 10. Biochemical tank; 11. Flow pipe; 12. Aeration disc; 13. Air box; 14. Filter plate; 15. Blower; 16. Gas collection box; 17. Delivery pipe; 18. Reaction tank; 19. Water pump; 20. Ozone generator; 21. Drain pipe; 22. Strip frame; 23. Drive motor; 24. Pulley; 25. Cylinder; 26. Square trough; 2 7. Nozzle; 28. Rotary joint; 29. ​​Air supply pipe; 30. Positioning plate; 31. Connector; 32. Slide groove; 33. Guide rod; 34. Threaded rod; 35. Servo motor; 36. Frame; 37. Guide block; 38. Drive block; 39. Threaded ring; 40. Flow groove; 41. Discharge groove; 42. Sealing box; 43. Pump; 44. Pumping pipe; 45. Dual-shaft motor; 46. Exhaust fan; 47. Air supply pipe; 48. Air inlet pipe; 49. Connecting pipe; 50. Waste liquid tank; 51. Diversion groove; 52. Spray hole. Detailed Implementation

[0042] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0043] like Figures 1 to 9As shown in the embodiment of the present invention, a high-concentration COD treatment device for electroplating wastewater from an electroplating production line includes a base plate 1, a mixing tank 2 fixedly installed on the top of the base plate 1, a mixing mechanism for stirring and mixing water inside the mixing tank 2, a solid biological bacteria tank 7 fixedly installed on the top of the base plate 1, a connecting component on the solid biological bacteria tank 7, a biological treatment tank 10 fixedly installed on the top of the base plate 1, and the solid biological bacteria tank 7 is connected to the mixing tank 2 and the biological treatment tank 10 respectively through the connecting component. An aeration mechanism for aeration is installed inside the biological treatment tank 10, an air supply mechanism for conveying air for aeration is installed on the base plate 1, a reaction chamber 18 fixedly installed on the top of the base plate 1, a mixing component for mixing ozone inside the reaction chamber 18, and the biological treatment tank 10... A frame 36 is provided, with a flow channel 40 embedded inside. Discharge channels 41 are arrayed on the flow channel 40. A sealing box 42 is installed inside the frame 36, containing a pumping mechanism. A diversion channel 51 is installed inside the frame 36, symmetrically arranged with the flow channel 40. Spray holes 52 are arrayed on the diversion channel 51. An adjustment mechanism for adjusting the position of the frame 36 is installed inside the biological treatment tank 10. When treating high-concentration COD wastewater using the electroplating production line's high-concentration COD wastewater treatment equipment, the collected (oil-removing, wax-removing) wastewater is collected and added to the mixing tank 2. A reaction solution is then added to the mixing tank 2, and the solution is mixed with the wastewater through the movement of the mixing mechanism. The system can adjust the pH of the wastewater to a uniform level of 7-8. Through the connecting components, the adjusted pH level is introduced into the solid-state biological fermentation tank 7. The bacteria produced in the solid-state biological fermentation tank 7 are then introduced into the biological treatment tank 10. Through the combined use of the air supply and aeration mechanisms, the liquid inside the biological treatment tank 10 is aerated. The increased bacterial growth can consume organic COD. High-concentration wastewater undergoes continuous inflow and outflow into the biological treatment tank 10 daily, effectively removing most of the organic COD. The wastewater from the biological treatment tank 10 is then discharged, and the discharged organic COD-laden wastewater enters the reaction tank 18 for further chemical oxidation. After 30 minutes, the COD level can be reduced to below 400. The mixing components further enhance the chemical oxidation process. Ozone is rapidly mixed with wastewater for an oxidation reaction, achieving cost savings. This reduces the costs associated with alkaline pretreatment for oil, wax, and acidification, as well as the costs of adding chemicals for oxidation after acidification, adjusting the alkali level after oxidation, adding flocculants after alkali adjustment, sludge pressing after flocculation, sludge disposal, and the workload of wastewater treatment workers. The biological bacteria are resilient to death; even after large-scale mortality, they can recover on their own within 2-3 days. Furthermore, centralized treatment of this water prevents pollution of other water systems, allowing for effective treatment of other wastewater systems. Electroplating wastewater is guaranteed to meet standards. Water from biological treatment tank 10 is continuously pumped into the biological bacteria circulation system and then discharged back into biological treatment tank 10. Only pumping and aeration electricity costs are required; no other costs are necessary. High-concentration COD wastewater treatment requires no chemical addition.COD evaporates into the air through aeration. High-concentration COD wastewater treatment using biochemical bacteria does not produce sludge, reducing the amount of hazardous sludge and ensuring environmental friendliness. During the aeration reaction in the biological treatment tank 10, foam may form on the water surface. Excessive foam may form an isolation layer, hindering oxygen-water contact, thus reducing aeration efficiency and affecting the aerobic metabolism of microorganisms. To remove the foam, the pumping mechanism extracts water from the flow tank 40, and the wastewater at the top of the biological treatment tank 10 is extracted through the discharge tank 41. The foam then follows the wastewater into the flow tank 40, where it is stored in the waste liquid tank 50, achieving the purpose of foam removal and effectively preventing excessive foam from affecting reaction efficiency. The position of the frame 36 can be adjusted by a regulating mechanism to follow the liquid level inside the biological treatment tank 10 for foam treatment.

[0044] Furthermore, the adjustment mechanism includes a slide 32, a guide rod 33, a threaded rod 34, a servo motor 35, a guide block 37, a drive block 38, and a threaded ring 39. The slides 32 are symmetrically arranged inside the biochemical tank 10. The guide rods 33 are fixedly installed inside the corresponding slides 32. The threaded rods 34 are rotatably arranged in the corresponding slides 32. The servo motor 35 is fixedly installed on the top of the biochemical tank 10, and its output end is fixedly connected to one end of the corresponding threaded rod 34. The guide block 37 is fixedly installed on the frame 36, and the guide rod 33 passes through the slide. The corresponding guide block 37 and drive block 38 are fixedly mounted on the frame 36. The threaded ring 39 is fixedly mounted inside the drive block 38. The threaded rod 34 is threadedly connected to the corresponding threaded ring 39. When the adjustment mechanism moves to adjust the position of the frame 36, the servo motor 35 will work to drive the threaded rod 34 to rotate. When the threaded rod 34 rotates, it will adjust the position of the drive block 38 through the engagement of the threaded ring 39. The drive block 38 will drive the frame 36 to move. When the frame 36 moves, it will move smoothly through the engagement of the guide rod 33 and the guide block 37.

[0045] Furthermore, the extraction mechanism includes an extraction pump 43, an extraction pipe 44, a dual-shaft motor 45, an exhaust fan 46, and an air supply pipe 47. The extraction pump 43 is fixedly installed inside the sealed box 42. One end of the extraction pipe 44 is connected to the input end of the extraction pump 43, and the other end of the extraction pipe 44 is connected to the flow channel 40. The dual-shaft motor 45 is fixedly installed inside the sealed box 42, and one of the output ends of the dual-shaft motor 45 is fixedly connected to the impeller inside the extraction pump 43. The exhaust fan 46 is fixedly installed inside the sealed box 42, and the other output end of the dual-shaft motor 45 is connected to the impeller inside the exhaust fan 46. One end of the air supply pipe 47 is connected to the output end of the exhaust fan 46, and the other end of the air supply pipe 47 is connected to the diversion channel 51. An air inlet pipe 48 is provided on the top of the sealed box 42, and the output end of the extraction pump 43 is connected to... A waste liquid tank 50 is fixedly installed on the side of the biological treatment tank 10 via a connecting pipe 49, and the other end of the connecting pipe 49 is connected to the waste liquid tank 50. When the dual-output shaft motor 45 is working, it will drive the pump 43 to move. The pump 43 will draw water from the flow tank 40 through the pumping pipe 44. The movement of the pump 43, in conjunction with the connecting pipe 49, will cause foam and waste liquid to flow into the waste liquid tank 50 for storage. When the dual-output shaft motor 45 is working, it will drive the exhaust fan 46 to work. The exhaust fan 46 will generate airflow through the air supply pipe 47, which will cause the airflow into the diversion tank 51. The airflow into the diversion tank 51 will flow through the spray hole 52 to the foam on the surface of the liquid inside the biological treatment tank 10, and then cause the foam to flow into the discharge tank 41. With the help of the discharge tank 41, the foam can be treated.

[0046] Furthermore, the mixing mechanism includes a power motor 4 and a stirring shaft 5. The power motor 4 is fixedly installed on the top of the mixing tank 2, and the stirring shaft 5 is rotatably installed inside the mixing tank 2. One end of the stirring shaft 5 is fixedly connected to the output end of the power motor 4. A water inlet pipe 3 is connected to the top of the mixing tank 2. When treating high-concentration COD electroplating wastewater, after the wastewater enters the mixing tank 2, the reaction solution is added to the mixing tank 2. Controlling the power motor 4 will drive the stirring shaft 5 to move. The movement of the stirring shaft 5 can stir and mix the wastewater inside the mixing tank 2, thereby allowing the wastewater and solution to mix and react, and adjusting the pH value of the wastewater.

[0047] Furthermore, the connecting components include a delivery pump 6 and a water delivery pipe 8. The delivery pump 6 is fixedly installed on the mixing tank 2, and its input end is connected to the mixing tank 2. The output end of the delivery pump 6 is connected to the solid biological bacteria tank 7 through a pipe. One end of the water delivery pipe 8 is connected to the solid biological bacteria tank 7, and the other end of the water delivery pipe 8 is connected to the biochemical pool 10. A controller 9 is fixedly installed on the top of the base plate 1. The controller 9 is electrically connected to the electronic devices on the high-concentration COD treatment equipment for electroplating wastewater of the electroplating production line, and can control the operation of the high-concentration COD treatment equipment for electroplating wastewater of the electroplating production line. When the delivery pump 6 is working, it can extract water from the mixing tank 2. The extracted water will enter the solid biological bacteria tank 7, where biological bacteria are cultivated. When the water flows, it will carry the biological bacteria into the biochemical pool 10 for reaction treatment.

[0048] Furthermore, the aeration mechanism includes a flow pipe 11 and an aeration disc 12. The flow pipe 11 is arranged around the inside of the biological treatment tank 10, and the aeration disc 12 is arranged in an array on the flow pipe 11. After the transported air enters the inside of the flow pipe 11, it will flow into the inside of the biological treatment tank 10 through the aeration disc 12, thereby ensuring that the oxygen is more evenly distributed in the biological treatment tank 10, avoiding local hypoxia or hyperxia, which helps the metabolism of microorganisms, improves the degradation rate of organic matter, and facilitates the purification treatment of sewage.

[0049] Furthermore, the air supply mechanism includes an air box 13, a filter plate 14, a blower 15, an air collection box 16, and a delivery pipe 17. The air box 13 is fixedly installed on the top of the base plate 1, the filter plate 14 is fixedly installed on the top of the air box 13, the blower 15 is fixedly installed inside the air box 13, the air collection box 16 is fixedly installed inside the air box 13, and the output end of the blower 15 is connected to the air collection box 16. One end of the delivery pipe 17 is connected to the air collection box 16, and the other end of the delivery pipe 17 is connected to the corresponding flow pipe 11. After the blower 15 operates and draws air into the air box 13, the air will flow into the air collection box 16 through the delivery pipe 17, and into the flow pipe 11 through the delivery pipe 17. The air will flow evenly into the biological tank 10 through the aeration disc 12 to aerate the sewage in the biological tank 10, facilitating the biological bacteria to react and purify the sewage.

[0050] Furthermore, a water pump 19 is fixedly installed on the top of the reaction tank 18, and the input end of the water pump 19 is connected to the inside of the biological tank 10 through a pipe, and the output end of the water pump 19 is connected to the reaction tank 18 through a pipe. A drain pipe 21 is provided on the reaction tank 18, and a solenoid valve is provided on the drain pipe 21. By operating the water pump 19, the wastewater after the reaction inside the biological tank 10 can be extracted, and the extracted wastewater can flow into the reaction tank 18 for oxidation reaction. After the oxidation reaction, the solenoid valve on the drain pipe 21 is controlled to operate, and the treated water source is discharged through the drain pipe 21.

[0051] Furthermore, the mixing assembly includes a strip frame 22, a drive motor 23, pulleys 24, a cylinder 25, square grooves 26, nozzles 27, and a conveying assembly. The strip frame 22 is fixedly mounted on the inner wall of the reaction chamber 18. The drive motor 23 is fixedly mounted on the strip frame 22. The pulleys 24 are arranged in an array and rotate inside the strip frame 22, with adjacent pulleys 24 connected by belt drive. The output end of the drive motor 23 is fixedly connected to the center of one of the pulleys 24. One end of the cylinder 25 is fixedly connected to the center of the corresponding pulley 24. The square grooves 26 are arranged in an array on the cylinder 25, and the square grooves 26 are connected to the cylinder 25. The components are connected in series. The nozzles 27 are arrayed on the square groove 26. The ozone delivery assembly is located on the reaction chamber 18. When ozone is delivered for the mixed oxidation reaction, the ozone is delivered into the cylinder 25 through the delivery assembly. The ozone enters the reaction chamber 18 through the cooperation of the square groove 26 and the nozzles 27. At the same time, the drive motor 23 drives the pulley 24 to move. When the pulley 24 moves, it drives the cylinder 25 and the square groove 26 to move, so that the ozone can enter the reaction chamber 18 evenly for mixing and oxidation treatment, which can reduce COD to below 400.

[0052] Furthermore, the delivery assembly includes an ozone generator 20, an air supply pipe 29, a positioning plate 30, a connector 31, and a rotary joint 28. The ozone generator 20 is fixedly mounted on the top of the reaction chamber 18, the air supply pipe 29 is located inside the reaction chamber 18, the positioning plate 30 is fixedly mounted on the air supply pipe 29, and the positioning plate 30 is fixedly connected to the inner top wall of the reaction chamber 18 by bolts. The connector 31 is located on the air supply pipe 29, and the connector 31 is connected to the output end of the ozone generator 20 through a pipe. The rotary joints 28 are arrayed on the air supply pipe 29, and the rotary joints 28 are movably connected to the top of the cylinder 25. When the ozone generator 20 operates, it generates ozone. Through the connector 31, the ozone enters the air supply pipe 29. Through the rotary joints 28, the ozone flows into the cylinder 25. Through the cylinder 25, the ozone can be evenly mixed and reacted with the water source for oxidation treatment.

[0053] Working Principle: Firstly, when treating high-concentration COD wastewater from an electroplating production line, the collected wastewater (after oil and wax removal) is added to mixing tank 2. A reaction solution is then added to mixing tank 2. After the reaction solution is added, the power motor 4 drives the stirring shaft 5, which mixes the wastewater in mixing tank 2, allowing the wastewater and solution to react and adjust the pH value of the wastewater. Once the pH value is adjusted to 7-8, the transfer pump 6 extracts water from mixing tank 2. The extracted water enters solid-state biological culture tank 7, where biological bacteria are cultivated. The water flows... At that time, the biological bacteria carried by the solid biological bacteria tank 7 flow into the biological treatment tank 10 for reaction treatment. After the biological bacteria produced by the solid biological bacteria tank 7 enter the biological treatment tank 10, the blower 15 works to draw air into the air box 13, and then through the delivery pipe 17, the air flows into the air collection box 16, and through the delivery pipe 17, the air flows into the flow pipe 11, and through the aeration disc 12, the air flows evenly into the biological treatment tank 10 to aerate the sewage inside the biological treatment tank 10, which facilitates the reaction and purification of sewage by biological bacteria. The increase in biological bacteria can consume organic COD. High-concentration sewage is continuously aerated and circulated in the biological treatment tank 10 every day, which can basically remove organic COD. Then the sewage inside the biological treatment tank 10 is discharged. Organic COD wastewater enters the reaction tank 18 and undergoes chemical oxidation. After 30 minutes, the COD can be reduced to below 400. Ozone generator 20 produces ozone, which enters the gas supply pipe 29 via connector 31. Rotary joint 28 allows the ozone to flow into the cylinder 25. Square trough 26 and nozzle 27 further facilitate ozone entry into the reaction tank 18. Simultaneously, drive motor 23 rotates pulley 24, which in turn moves cylinder 25 and square trough 26, ensuring uniform ozone entry into the reaction tank 18 for mixing and oxidation. This process saves costs by reducing the acid flow costs associated with alkaline pretreatment for oil, wax, and acid removal, and minimizing the need for adjustments. This reduces the cost of post-acidification oxidation, post-oxidation alkali adjustment, post-alkali adjustment flocculant addition, post-flocculation sludge pressing, sludge disposal, and the workload of wastewater treatment workers. The biological bacteria are resilient to death; even after large-scale mortality, they can recover on their own within 2-3 days. Centralized treatment of this water prevents pollution of other water systems, allowing for effective treatment of other wastewater systems. Electroplating wastewater is guaranteed to meet standards. Water from biological treatment tank 10 is continuously pumped into the biological bacteria circulation system and discharged back into biological treatment tank 10. Only pumping and aeration electricity costs are required; no other costs are necessary. High-concentration COD wastewater treatment requires no chemical addition; COD evaporates into the air through aeration. The biological bacteria treatment of high-concentration COD wastewater does not produce sludge, reducing the amount of hazardous sludge generated. It is environmentally friendly and pollution-free.During the aeration process in the biological treatment tank 10, foam may form on the surface of the water source. Excessive foam may form an isolation layer, hindering the contact between oxygen and water, thereby reducing aeration efficiency and affecting the aerobic metabolism of microorganisms. When treating and removing the foam, the dual-output shaft motor 45 drives the pump 43. The pump 43 draws water from the flow tank 40 through the pumping pipe 44. The movement of the pump 43, in conjunction with the connecting pipe 49, causes the foam and waste liquid to flow into the waste liquid tank 50 for storage. The operation of the dual-output shaft motor 45 also drives the exhaust fan 46. The exhaust fan 46 generates airflow through the air supply pipe 47, which directs the airflow into the diversion tank 51. Inside the diversion tank 51, the airflow, through the spray nozzles 52, directs the airflow towards the foam on the surface of the liquid in the biological treatment tank 10. This foam then flows towards the discharge tank 41, where it is processed and removed, effectively preventing excessive foam from affecting reaction efficiency. The position of the frame 36 can be adjusted using the adjustment mechanism, allowing it to follow the position of the liquid level inside the biological treatment tank 10 to effectively manage the foam.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-concentration COD treatment device for electroplating wastewater from an electroplating production line, characterized in that: The system includes a base plate (1), a mixing tank (2) fixedly installed on the top of the base plate (1), a mixing mechanism for stirring and mixing water inside the mixing tank (2), a solid biological bacteria tank (7) fixedly installed on the top of the base plate (1), a connecting component on the solid biological bacteria tank (7), a biochemical tank (10) fixedly installed on the top of the base plate (1), and the solid biological bacteria tank (7) is connected to the mixing tank (2) and the biochemical tank (10) respectively through the connecting component. An aeration mechanism for aeration is installed inside the biochemical tank (10), an air supply mechanism for conveying air for aeration is installed on the base plate (1), and a reaction chamber (18) fixedly installed on the top of the base plate (1). The reaction chamber (18) is equipped with a mixing component for mixing ozone. The biochemical tank (10) is equipped with a frame (36). The frame (36) is inlaid with a flow channel (40). The flow channel (40) is arranged with an array of discharge channels (41). The frame (36) is equipped with a sealing box (42). The sealing box (42) is equipped with a pumping mechanism. The frame (36) is equipped with a diversion channel (51). The diversion channel (51) is symmetrically arranged with the flow channel (40). The diversion channel (51) is arranged with an array of spray holes (52). The biochemical tank (10) is equipped with an adjustment mechanism for adjusting the position of the frame (36). The adjustment mechanism includes a slide (32), a guide rod (33), a threaded rod (34), a servo motor (35), a guide block (37), a drive block (38), and a threaded ring (39). The slide (32) is symmetrically arranged inside the biochemical tank (10). The guide rod (33) is fixedly installed inside the corresponding slide (32). The threaded rod (34) is rotatably arranged in the corresponding slide (32). The servo motor (35) is fixedly installed on the top of the biochemical tank (10), and the output end of the servo motor (35) is fixedly connected to one end of the corresponding threaded rod (34). The guide block (37) is fixedly arranged on the frame (36), and the guide rod (33) passes through the corresponding guide block (37). The drive block (38) is fixedly arranged on the frame (36). The threaded ring (39) is fixedly arranged inside the drive block (38). The threaded rod (34) is threadedly connected to the corresponding threaded ring (39). The extraction mechanism includes an extraction pump (43), an extraction pipe (44), a dual-shaft motor (45), an exhaust fan (46), and an air supply pipe (47). The extraction pump (43) is fixedly installed inside the sealed box (42). One end of the extraction pipe (44) is connected to the input end of the extraction pump (43), and the other end of the extraction pipe (44) is connected to the flow channel (40). The dual-shaft motor (45) is fixedly installed inside the sealed box (42), and one of the output ends of the dual-shaft motor (45) is fixedly connected to the impeller inside the extraction pump (43). The exhaust fan... (46) is fixedly installed inside the sealed box (42), and the other of the dual-shaft motor (45) is connected to the impeller inside the exhaust fan (46). One end of the air supply pipe (47) is connected to the output end of the exhaust fan (46), and the other end of the air supply pipe (47) is connected to the diversion channel (51). An air inlet pipe (48) is provided on the top of the sealed box (42). A connecting pipe (49) is connected to the output end of the pump (43). A waste liquid tank (50) is fixedly installed on the side of the biochemical tank (10), and the other end of the connecting pipe (49) is connected to the waste liquid tank (50).

2. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 1, characterized in that: The mixing mechanism includes a power motor (4) and a stirring shaft (5). The power motor (4) is fixedly installed on the top of the mixing tank (2). The stirring shaft (5) is rotatably installed inside the mixing tank (2). One end of the stirring shaft (5) is fixedly connected to the output end of the power motor (4). A water inlet pipe (3) is connected to the top of the mixing tank (2).

3. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 2, characterized in that: The connecting components include a delivery pump (6) and a water delivery pipe (8). The delivery pump (6) is fixedly installed on the mixing tank (2), and the input end of the delivery pump (6) is connected to the mixing tank (2). The output end of the delivery pump (6) is connected to the solid biological bacteria tank (7) through a pipe. One end of the water delivery pipe (8) is connected to the solid biological bacteria tank (7), and the other end of the water delivery pipe (8) is connected to the biochemical pool (10). A controller (9) is fixedly installed on the top of the base plate (1).

4. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 1, characterized in that: The aeration mechanism includes a flow pipe (11) and an aeration disc (12). The flow pipe (11) is arranged around the inside of the biochemical tank (10), and the aeration discs (12) are arranged in an array on the flow pipe (11).

5. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 4, characterized in that: The air supply mechanism includes a wind box (13), a filter plate (14), a blower (15), an air collection box (16), and a delivery pipe (17). The wind box (13) is fixedly installed on the top of the base plate (1). The filter plate (14) is fixedly installed on the top of the wind box (13). The blower (15) is fixedly installed inside the wind box (13). The air collection box (16) is fixedly installed inside the wind box (13), and the output end of the blower (15) is connected to the air collection box (16). One end of the delivery pipe (17) is connected to the air collection box (16), and the other end of the delivery pipe (17) is connected to the corresponding flow pipe (11).

6. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 1, characterized in that: A water pump (19) is fixedly installed on the top of the reaction tank (18), and the input end of the water pump (19) is connected to the inside of the biochemical tank (10) through a pipe. The output end of the water pump (19) is connected to the reaction tank (18) through a pipe. A drain pipe (21) is provided on the reaction tank (18), and a solenoid valve is provided on the drain pipe (21).

7. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 6, characterized in that: The mixing assembly includes a strip frame (22), a drive motor (23), pulleys (24), a cylinder (25), a square trough (26), nozzles (27), and a conveying assembly. The strip frame (22) is fixedly installed on the inner wall of the reaction chamber (18). The drive motor (23) is fixedly installed on the strip frame (22). The array of pulleys (24) is rotatably installed inside the strip frame (22), and adjacent pulleys (24) are connected by belt drive. The output end of the drive motor (23) is fixedly connected to the center position of one of the pulleys (24). One end of the cylinder (25) is fixedly connected to the center position of the corresponding pulley (24). The array of square troughs (26) is installed on the cylinder (25), and the square troughs (26) are connected to the cylinder (25). The array of nozzles (27) is installed on the square troughs (26). The conveying assembly for conveying ozone is installed on the reaction chamber (18).

8. The high-concentration COD treatment equipment for electroplating wastewater from an electroplating production line according to claim 7, characterized in that: The delivery assembly includes an ozone generator (20), a gas supply pipe (29), a positioning plate (30), a connector (31), and a rotary joint (28). The ozone generator (20) is fixedly installed on the top of the reaction chamber (18). The gas supply pipe (29) is installed inside the reaction chamber (18). The positioning plate (30) is fixedly installed on the gas supply pipe (29) and is fixedly connected to the inner top wall of the reaction chamber (18) by bolts. The connector (31) is installed on the gas supply pipe (29) and is connected to the output end of the ozone generator (20) through a pipe. The rotary joints (28) are arranged in an array on the gas supply pipe (29) and are movably connected to the top of the cylinder (25).

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