A post-electroplating wastewater classification treatment and recovery system

Abstract

This application relates to a graded treatment and recycling system for post-electroplating wastewater, including a reaction tank and a shielding cover. The shielding cover is detachably and fixedly connected to the reaction tank. Several water inlet holes are opened on the periphery of the shielding cover, and water inlet pipes are connected to the water inlet holes. A ball sealing device is installed in the water inlet holes, and a water curtain generating device is installed at the water inlet pipe. By setting up the shielding cover and the ball sealing device, this application has the technical effect of effectively preventing the leakage of various harmful gases generated during the stages of wastewater entry, wastewater flow, and wastewater reaction, which greatly ensures the construction safety of post-electroplating wastewater treatment.

Description

Technical Field

[0001] This application relates to the field of electroplating wastewater treatment technology, specifically to a graded treatment and recycling system for post-electroplating wastewater. Background Technology

[0002] Currently, the graded treatment of post-electroplating wastewater refers to dividing the wastewater treatment process into different stages, with each stage targeting specific pollutants to achieve the desired treatment effect. Specifically, the graded treatment of post-electroplating wastewater mainly includes the following three levels:

[0003] Primary treatment mainly employs physical methods such as sedimentation, filtration, and aeration to remove suspended solids, floating matter, and some suspended pollutants from wastewater. Primary treatment can reduce the degree of water degradation and lessen the load on subsequent treatment processes.

[0004] Secondary treatment: This typically employs biological treatment methods, such as activated sludge and biofilm processes, primarily removing dissolved and colloidal organic matter, as well as some nutrients like ammonia and phosphorus, from wastewater. Secondary treatment can significantly reduce BOD and COD, enabling wastewater to meet discharge standards.

[0005] Tertiary treatment, also known as advanced or deep treatment, employs various physicochemical methods such as coagulation sedimentation, adsorption, ion exchange, electrodialysis, and reverse osmosis to further remove recalcitrant organic matter, ammonia, phosphorus, heavy metals, and pathogenic microorganisms from wastewater. Tertiary treatment aims to improve effluent quality to meet higher reuse requirements or direct discharge standards. Through these three levels of treatment, electroplating wastewater can be effectively purified, ensuring that the quality of discharged or reused water meets relevant standards. Recycling refers to the ability to reuse the treated wastewater, for example, through processes such as deep membrane treatment, filtration, and evaporation, ultimately transforming it into reusable recycled water.

[0006] Of these three levels of treatment, primary treatment may generate harmful gases. This is because primary treatment typically refers to physicochemical treatment, primarily used to remove cyanide and heavy metals from wastewater. However, this process may generate or release harmful gases. For example, cyanide-containing wastewater may produce toxic hydrogen cyanide gas during treatment; this gas is extremely toxic, and inhaling even a small amount can be fatal. Therefore, strict measures are required when treating cyanide-containing wastewater, such as covering and sealing the cyanide-breaking reaction tank and establishing a ventilation system to prevent the escape of harmful gases. Furthermore, in the electroplating process, the main sources of wastewater before treatment include acidic gases generated during pretreatment stages such as pickling and alkali washing, various harmful gases generated during the evaporation of electroplating solutions and cleaning processes, and harmful gases released during wastewater treatment steps such as neutralization and precipitation.

[0007] Therefore, for existing electroplating wastewater classification and treatment equipment, it is very important to set up a facility that can prevent the escape of harmful gases in all aspects for current actual production in this field.

[0008] Regarding the aforementioned technical issues, Chinese Patent No. CN118515336A proposes a graded treatment and recycling system for post-electroplating wastewater, relating to the field of wastewater treatment technology. This system solves the problem that heavy metal ions, encapsulated in bubbles, are easily discharged from the pipes along with the wastewater during discharge, affecting the wastewater treatment effect. The post-electroplating wastewater graded treatment and recycling system includes a wastewater treatment tank, an upper cover, an inner chamber, and a wastewater graded treatment mechanism. The top of the wastewater treatment tank is open and sealed by the upper cover, which is installed with screws. An inner chamber is installed on the top of the wastewater treatment tank, and the wastewater graded treatment mechanism extends into the inner chamber. In this invention, the separation of wastewater and heavy metal ions can be achieved before wastewater discharge, reducing the probability of suspended heavy metal ions being discharged along with the wastewater. Simultaneously, it can grade the wastewater, improving the efficiency and effectiveness of treating impurities in the wastewater.

[0009] However, there are no practical optimizations or improvements regarding the gas treatment or sealing of harmful gases generated during the primary treatment process, and it is impossible to effectively prevent the leakage of harmful gases. Summary of the Invention

[0010] To address the aforementioned technical problems, this application provides a graded treatment and recycling system for post-electroplating wastewater, thereby resolving the existing technical issues related to the generation of harmful gases during post-electroplating wastewater treatment, which poses a production hazard.

[0011] This application provides a graded treatment and recycling system for post-electroplating wastewater, which adopts the following technical solution:

[0012] A graded treatment and recycling system for electroplating wastewater includes a reaction tank and a shielding cover. The shielding cover is detachably and fixedly connected to the reaction tank. Several water inlet holes are opened on the periphery of the shielding cover. Water inlet holes are connected to water inlet pipes. A ball sealing device is installed in the water inlet holes. A water curtain generating device is installed at the water inlet pipe.

[0013] By adopting the above technical solution, the present invention can effectively prevent the overflow of various harmful gases generated during stages such as wastewater entry, wastewater flow, and wastewater reaction, thus greatly ensuring the construction safety of wastewater treatment after electroplating.

[0014] Preferably, the ball sealing device includes a receiving ring fixedly connected to the shielding cover. The receiving ring is located below the water inlet. A partial spherical surface is formed on one side of the receiving ring. A support ring is provided at the bottom of the receiving ring. The support ring is fixedly connected to the inner wall of the shielding cover. A sealing ball is placed on the receiving ring. A plurality of water grooves are formed on the sealing ball. A plurality of stop plates are provided at the top of the sealing ball. A plurality of stop blocks are provided inside the shielding cover. A switch button for controlling the water curtain generating device is provided inside the stop blocks.

[0015] Through the above technical solution, the present invention can achieve the effect of preventing gas leakage before and during the entry of electroplating wastewater into the reaction tank. First, one or more inlets are selected, and the electroplating wastewater is connected to the inlet pipe through a pipeline. It is important to note that when connecting multiple inlets, adjacent inlet pipes should be selected for connection. After connection and sealing, the electroplating wastewater first flows into the interior of the shielding cover through the inlet pipe. The connecting hole of the inlet pipe inside the shielding cover is located above the receiving ring. After the electroplating wastewater enters, it automatically flows into the surface of the sealing sphere and accumulates in the water channel. When the electroplating wastewater accumulates to a certain amount... The sealing ball deflects due to the weight of the electroplating wastewater in the water tank, rotating the bottom of the water tank beyond the receiving ring. At this time, the electroplating wastewater in the water tank can flow into the reaction tank, while the top of the water tank can cooperate with the receiving ring to form a new sealed space. This prevents harmful gases generated by the electroplating wastewater in the reaction tank from flowing into the top of the shielding cover, thus isolating harmful gases from overflowing from the inlet pipe during the injection and storage of electroplating wastewater. Through a purely mechanical structure, the safety and durability of the facility are greatly guaranteed, thereby ensuring the safety of the staff.

[0016] Preferably, the sealing ball is hollow inside, the top of the sealing ball has an installation hole, the installation hole is connected to a top cover by bolts, the bottom of the sealing ball is provided with a connecting column, and a counterweight bearing is provided on the connecting column.

[0017] Through the above technical solution, the present invention can realize that after the sealing ball rotates, the self-weight of the counterweight bearing and the centrifugal force generated by the slight rotation can make the sealing ball automatically return to the initial position after being driven by the wastewater after electroplating, thus further ensuring the automation and sealing performance of the equipment.

[0018] Preferably, the top of the shielding cover is provided with a pressure expansion detection device, which includes a detection tube fixedly connected to the top of the shielding cover, a detection ball connected above the detection tube, the detection ball being elastic, and a pressure sensor and an alarm being provided on the top of the detection ball.

[0019] Through the above technical solution, the present invention can achieve the following: when wear occurs in the relevant structure of the sealing ball, causing gas to flow to the top of the sealing ball, the gas will automatically flow upward to the expansion detection device because the water inlet pipe is connected to the external pipeline and is sealed. This causes the detection ball to inflate and expand, thereby contacting the pressure sensor located on the top of the detection ball. The signal can be transmitted to the alarm device to trigger an alarm using existing technology. At this time, the staff can clearly know that the equipment has malfunctioned and there is a risk of gas leakage. They can stop the equipment operation, strengthen protection, and carry out equipment maintenance, thus avoiding the occurrence of harmful gas poisoning of personnel when the equipment is damaged.

[0020] Preferably, a temporary air storage box is provided on one side of the air pressure expansion detection device. The temporary air storage box is connected to the detection ball through a vent pipe. A pressure valve is provided in the vent pipe. A spray head and a container are provided in the temporary air storage box.

[0021] Through the above technical solution, this invention can achieve the following: when wear occurs in the relevant structure of the sealing ball, causing gas to flow above the sealing ball, the detection ball expands to a certain extent and activates the pressure sensor. In addition to activating the alarm, the spray head located in the temporary gas storage box can also be activated simultaneously using existing technology. At this time, when the gas inside the detection ball reaches a certain pressure, the pressure increases again and opens the pressure valve, allowing the gas to enter the temporary gas storage box. The gas comes into contact with the chemical agents in the storage box and is initially neutralized, minimizing the gas hazard. At the same time, this setting also ensures that when the gas leakage rate is relatively fast, the time from alarm to workers putting on protective measures can be delayed as much as possible, and the toxicity of the overflowing gas can be minimized, thus protecting the personal safety of the workers as much as possible.

[0022] Preferably, the reaction tank and the shielding cover are connected by a thickened flange ring, the thickened flange ring having an anti-leakage sealing ring inside and a secondary protective ring outside.

[0023] Through the above technical solution, the present invention can ensure a high degree of sealing at the connection between the shielding cover and the reaction tank. The downward pressure generated by the thickened flange ring after connection compresses the anti-leakage sealing ring to achieve sealing. In addition, there is a secondary protective ring as a secondary insurance, which can minimize the risk of gas leakage at the connection between the shielding cover and the reaction tank.

[0024] Preferably, the leak-proof sealing ring includes a sealing soft ring and an M-shaped deformable ring, with the sealing soft ring located inside the M-shaped deformable ring.

[0025] Through the above technical solution, the present invention can achieve excellent sealing effect by using the downward pressure of the thickened flange ring connection to compress the M-shaped deformable ring to produce deformation, and compress the sealing soft ring to tighten against the thickened flange ring connection.

[0026] Preferably, the secondary protective ring includes a water collection ring fixedly connected to the shielding cover, the bottom of the water collection ring being fixedly connected to the thickened flange ring, and the water collection ring can collect the water falling from the water curtain generating device.

[0027] Through the above technical solution, the present invention can realize the formation of a water ring by the water sprayed by the water curtain generator, further sealing the thickened flange ring and further preventing harmful gases from leaking from the connection between the cover and the reaction tank.

[0028] Preferably, the water curtain generating device includes a water supply pipe and a water curtain generator. The water curtain generator is connected to a start button inside the shielding cover via a sealing pipe. The start button is connected to the shielding cover via a sealing block, and a sealing gasket is provided between the sealing block and the shielding cover.

[0029] Through the above technical solution, the present invention can realize that when the ball sealing device is running, the water curtain generator on one or more nearby water inlets is activated to spray out a water curtain, thereby optimizing the sealing effect at the connection between the water inlet and the external water pipe.

[0030] Preferably, a sealing post is inserted into the water inlet pipe, a plurality of sealing rings are provided on the sealing post, a handle is provided on the sealing post, and a top protective cover is provided on the shielding cover.

[0031] Through the above technical solution, the present invention can enable the use of any direction of the water inlet pipe without moving the reaction equipment, which is extremely convenient in actual use. In addition, the multiple sealing rings of the sealing column can also ensure the seal when the water inlet pipe is not used.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. This invention can effectively prevent the leakage of various harmful gases generated during stages such as wastewater ingress, wastewater flow, and wastewater reaction, greatly ensuring the construction safety of wastewater treatment after electroplating.

[0034] 2. This invention can achieve sealing in multiple ways from multiple positions of the back pool and the cover, and has detection and alarm functions.

[0035] 3. By setting up an M-shaped deformable ring structure and a secondary protective ring structure, the present invention uses a multi-layer sealing method to effectively prevent harmful gases from leaking from the connection between the shielding cover and the reaction tank.

[0036] 4. This invention can achieve the initial leakage gas treatment function when gas leaks from the reaction tank. When used in conjunction with physical leakage detection methods and alarm devices, it can provide a clear alarm reminder to construction personnel in case of further harmful gas leakage.

[0037] 5. This invention can automatically perform preliminary treatment of leaked harmful gases when gas leaks in the reaction tank, greatly reducing the damage caused to construction personnel by the leak.

[0038] 6. While using spray liquid to protect the water inlet pipe, the present invention can recycle and reuse the spray liquid, which can first prevent the harmful substances in the spray liquid itself from polluting the working environment, and can also achieve the technical effect of energy saving and environmental protection. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the electroplating wastewater graded treatment and recycling system of the present invention;

[0040] Figure 2 This is a cross-sectional schematic diagram of the electroplating wastewater classification treatment and recycling system of the present invention;

[0041] Figure 3 yes Figure 2 Enlarged diagram of A in the middle;

[0042] Figure 4 This is a schematic diagram of the internal structure of the electroplating wastewater graded treatment and recycling system of the present invention;

[0043] Figure 5 yes Figure 4 Enlarged diagram of B in the middle;

[0044] Figure 6 yes Figure 4 Enlarged diagram of C in the middle;

[0045] Figure 7 yes Figure 4 An enlarged schematic diagram of D in the diagram.

[0046] Explanation of reference numerals in the attached drawings: 1. Reaction tank; 2. Cover; 3. Water inlet; 4. Water inlet pipe; 5. Ball bearing device; 6. Water curtain generator; 7. Receiving ring; 8. Support ring; 9. Sealing ball; 10. Water channel; 11. Stop plate; 12. Stop block; 13. Mounting hole; 14. Top cover; 15. Connecting column; 16. Counterweight bearing; 17. Gas pressure expansion detection device; 18. Detection tube; 19. Detection ball; 20. 21. Pressure sensor; 22. Temporary air storage box; 23. Vent pipe; 24. Pressure valve; 25. Spray head; 26. Container box; 27. Thickened flange ring; 28. Leak-proof sealing ring; 29. ​​Secondary protection ring; 30. Sealing soft ring; 31. M-shaped deformable ring; 32. Water collection ring; 33. Water supply pipe; 34. Water curtain generator; 35. Start button; 36. Sealing gasket; 37. Sealing column; 38. Sealing ring; 39. Protective cover. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0048] This application discloses a graded treatment and recycling system for post-electroplating wastewater. (Refer to...) Figure 1-7 This invention discloses a graded treatment and recycling system for post-electroplating wastewater, comprising a reaction tank 1 and a shielding cover 2. The shielding cover 2 is detachably and fixedly connected to the reaction tank 1. Several water inlet holes 3 are provided around the shielding cover 2, and water inlet pipes 4 are connected to the water inlet holes 3. A ball sealing device 5 is installed inside the water inlet holes 3, and a water curtain generating device 6 is installed at the water inlet pipe 4. By setting the shielding cover 2, this invention can effectively prevent the overflow of various harmful gases generated during stages including wastewater entry, wastewater flow, and wastewater reaction, greatly ensuring the construction safety of post-electroplating wastewater treatment.

[0049] Furthermore, the ball sealing device 5 includes a receiving ring 7 fixedly connected to the shielding cover 2. The receiving ring 7 has a partially spherical surface on one side, located below the water inlet hole 3. A sealing ball 9 is placed on the receiving ring 7, and several water-flowing grooves 10 are formed on the sealing ball 9. Several stop plates 11 are provided on the top of the sealing ball 9, and several stop grooves are provided inside the shielding cover 2. A switch button for controlling the water curtain generating device 6 is provided in the stop groove. The sealing ball 9 is hollow inside, with an installation hole 13 on its top and a connecting post 15 at its bottom. A counterweight is inserted into the connecting post 15. The water curtain generating device 6 includes a water supply pipe 32 and a water curtain generator 33. The water curtain generator 33 is connected to a start button 34 inside the shielding cover 2 via a sealing pipe. The start button 34 is connected to the shielding cover 2 via a sealing block, and a sealing gasket 35 is provided between the sealing block and the shielding cover 2.

[0050] With this configuration, in actual use, the present invention first selects one or more water inlets and connects the electroplating wastewater to the water inlet pipe 4 through a pipeline. It should be noted that when connecting multiple water inlets 3, adjacent water inlet pipes 4 should be selected for connection. After connection and sealing, the electroplating wastewater first flows into the interior of the shielding cover 2 through the water inlet pipe 4. The connecting hole of the water inlet pipe 4 inside the shielding cover 2 is located above the receiving ring 7. After the electroplating wastewater enters, it will automatically flow into the surface of the sealing ball 9 and accumulate in the water channel 10. When the electroplating wastewater accumulates to a certain amount, the sealing ball 9 will release the wastewater in the water channel 10. The weight of the water causes a deflection, rotating the lower part of the water tank 10 beyond the receiving ring 7. At this point, the electroplating wastewater in the water tank 10 can flow into the reaction tank 1. The upper part of the water tank 10 can then cooperate with the receiving ring 7 to form a new sealed space, thereby preventing harmful gases generated by the electroplating wastewater in the reaction tank 1 from flowing into the shielding cover 2. This effectively isolates harmful gases from escaping from the inlet pipe 4 during the injection and storage of electroplating wastewater. Through a purely mechanical structure, the safety and durability of the facility are greatly ensured, thus guaranteeing the safety of personnel. It effectively prevents the leakage of various harmful gases generated during wastewater entry, wastewater flow, and wastewater reaction, greatly ensuring the safety of construction during the treatment of electroplating wastewater.

[0051] Furthermore, a pressure expansion detection device 17 is provided on the top of the cover 2. The pressure expansion detection device 17 includes a detection tube 18 fixedly connected to the top of the cover 2, and a detection ball 19 connected above the detection tube 18. The detection ball 19 is elastic, and a pressure sensor 20 and an alarm are provided on the top of the detection ball 19. A temporary air storage tank 21 is provided on one side of the pressure expansion detection device 17. The temporary air storage tank 21 is connected to the detection ball 19 through a vent pipe 22. A pressure valve 23 is provided in the vent pipe 22, and a spray head 24 and a container 25 are provided in the temporary air storage tank 21.

[0052] With this configuration, when the electroplating wastewater classification treatment and recycling system designed in this invention leaks due to wear or other reasons, and harmful gases flow to the top of the sealing ball 9, the gas will automatically flow upward to the expansion detection device because the inlet pipe 4 is connected to the external pipeline and is sealed. This causes the detection ball 19 to inflate and expand, thereby contacting the pressure sensor 20 located on top of the detection ball 19. The signal can be transmitted to the alarm device using existing technology to trigger an alarm. At this time, the staff can clearly know that the equipment has malfunctioned and there is a risk of leakage. They can stop the equipment operation, strengthen protection, and carry out equipment maintenance, thus avoiding the phenomenon of personnel being poisoned by harmful gases when the equipment is damaged.

[0053] Meanwhile, when the amount of leaked gas is large, after the detection ball 19 expands to a certain extent and activates the pressure sensor 20, in addition to activating the alarm, the spray head 24 located in the temporary gas storage box 21 can also be activated at the same time through existing technology. At this time, when the gas in the detection ball 19 reaches a certain pressure, the gas pressure increases again and can open the pressure valve 23, allowing the gas to enter the temporary gas storage box 21, come into contact with the chemical agent in the container 25 inside the temporary gas storage box 21 and be initially neutralized, minimizing the gas hazard to the greatest extent. At the same time, this setting also ensures that when the gas leakage rate is fast, the time from alarm to workers putting on protective measures can be delayed as much as possible, and the toxicity of the overflowing gas can be minimized to the greatest extent, protecting the personal safety of workers as much as possible.

[0054] Furthermore, the reaction tank 1 and the shielding cover 2 are connected by a thickened flange ring 26. A leak-proof sealing ring is installed inside the thickened flange ring 26, and a secondary protective ring 28 is installed on the outside of the thickened flange ring 26. The leak-proof sealing ring includes a sealing soft ring 29 and an M-shaped deformable ring 30, with the sealing soft ring 29 located inside the M-shaped deformable ring. The secondary protective ring 28 includes a water collection ring 31 fixedly connected to the shielding cover 2. The bottom of the water collection ring 31 is fixedly connected to the thickened flange ring 26, and the water collection ring 31 can collect water falling from the water curtain generator 6.

[0055] This setup allows for several advantages. First, the water sprayed by the water curtain generator 6 forms a water ring, further sealing the thickened flange ring 26 and preventing harmful gases from leaking from the connection between the shielding cover 2 and the reaction tank 1. Second, when the ball sealing device 5 is running, the water curtain generator 6 at one or more nearby inlets can be activated to spray a water curtain, optimizing the sealing effect at the connection between the inlet and the external water pipe. Finally, it ensures a high degree of sealing at the connection between the shielding cover 2 and the reaction tank 1. The downward pressure from the thickened flange ring 26 after connection compresses the upper and lower surfaces of the M-shaped deformable ring 30, causing the M-shaped deformable ring 30 to deform and thus compressing the sealing soft ring 29, making it fit more tightly with the thickened flange ring 26, thereby further optimizing the sealing effect of the thickened flange ring 26.

[0056] In addition, a secondary protective ring 28 serves as a secondary safety measure. During actual use, the upper half of the secondary protective ring 28 has an open, conical structure, allowing it to receive the spray liquid from the water curtain generator 6 and collect it in the lower half. This forms a circular sealing water ring on the outside of the thickened flange ring 26, thus acting as a secondary protection measure to prevent the leakage of harmful gases. Furthermore, a spray liquid recovery device and a circulation device can be connected to the outside of the protective ring 28. The existing technology for these recovery and circulation devices is mature and cost-effective, allowing for direct installation and use. It is important to note that when installing the recovery and circulation devices, their inlets must be higher than the thickened flange ring 26. This ensures that sufficient sealing water ring formed by the spray liquid exists on the outside of the thickened flange ring 26 before spray liquid recovery and circulation.

[0057] This configuration minimizes the risk of gas leakage at the connection between the cover 2 and the reaction tank 1. Furthermore, recycling the spray liquid prevents harmful substances in the spray liquid from contaminating the working environment and achieves energy-saving and environmentally friendly technical benefits.

[0058] The working principle of the electroplating wastewater graded treatment and recycling system in this application is as follows:

[0059] The first layer consists of a targeted structure and function to prevent the leakage of harmful gases:

[0060] To address the gas-sealing process of post-electroplating wastewater entering the system, a relatively simple connection and seal are first ensured between the external pipeline and the inlet pipe 4. Then, by using a ball seal device 5 in conjunction with the inlet pipe 4, the post-electroplating wastewater is connected to the inlet pipe 4 through the pipeline. It is important to note that when connecting multiple inlet holes 3, adjacent inlet pipes 4 must be selected for connection. After connection and sealing, the post-electroplating wastewater first flows through the inlet pipe 4 into the shielding cover 2. The connecting hole of the inlet pipe 4 inside the shielding cover 2 is located above the receiving ring 7. After entering, the post-electroplating wastewater automatically flows onto the surface of the sealing ball 9 and accumulates in the water channel 10. When the post-electroplating wastewater accumulates to... After a certain amount, the sealing ball 9 deflects due to the weight of the electroplating wastewater in the water tank 10, rotating the bottom of the water tank 10 beyond the receiving ring 7. At this time, the electroplating wastewater in the water tank 10 can flow into the reaction tank 1, while the top of the water tank 10 can cooperate with the receiving ring 7 to form a new sealed space, thereby preventing harmful gases generated by the electroplating wastewater in the reaction tank 1 from flowing into the top of the shielding cover 2. This effectively isolates harmful gases from overflowing from the inlet pipe 4 during the injection and reaction of the electroplating wastewater, and prevents harmful gases from flowing out of the inlet pipe 4. Through a purely mechanical structure, the safety and durability of the facility are greatly guaranteed, thereby ensuring the safety of the staff.

[0061] Secondly, there are targeted structures and functions to prevent the leakage of harmful gases as a second layer of protection:

[0062] This system primarily addresses the sealing and detection of harmful gases generated during the reaction in the reaction tank 1 after electroplating wastewater enters the system. By installing an expansion detection device, when wear occurs in the structure of the sealing ball 9, causing gas to flow above it, the gas will automatically flow upwards into the expansion detection device because the inlet pipe 4 is connected to and sealed with the external pipeline. This causes the detection ball 19 to inflate and expand, contacting the pressure sensor 20 located on top of the detection ball 19. Using existing technology, the signal can be transmitted to the alarm to trigger an alarm. At this point, staff can clearly know that the equipment has malfunctioned and there is a risk of gas leakage. They can then stop the equipment operation, strengthen protection, and carry out equipment maintenance, thus preventing personnel from suffering from harmful gas poisoning due to equipment damage.

[0063] Then, for the third layer of protection against the leakage of harmful gases, the following targeted structures and functions are provided:

[0064] This system is primarily designed to address situations where harmful gases, already under pressure, are about to leak after the electroplating wastewater enters the system and reacts in the reaction tank 1. At this point, the detection ball 19 expands to a certain extent and activates the pressure sensor 20. In addition to activating the alarm, the spray head 24 located in the temporary gas storage tank 21 can also be activated simultaneously using existing technology. When the gas inside the detection ball 19 reaches a certain pressure, the increased pressure opens the pressure valve 23, allowing the gas to enter the temporary gas storage tank 21. There, the gas comes into contact with the chemical reagents in the container 25 within the tank and undergoes initial neutralization, minimizing gas hazard. This design also ensures that in cases of rapid gas leakage, the time from alarm activation to workers donning protective measures is delayed as much as possible, and the toxicity of the spilled gas is minimized, thus protecting the personal safety of workers to the greatest extent possible.

[0065] Specific structures and functions at the connection points parallel to it to prevent the leakage of harmful gases:

[0066] The main components are the reaction tank 1 and the core technical structure mentioned in this invention, namely the first and second layers of structure at the connection between the shielding cover 2 and the reaction tank 1 to prevent the leakage of harmful gases. By designing the M-shaped deformable ring 30 and the sealing soft ring 29 in combination, pressure is applied to achieve a better sealing effect on top of the conventional sealing effect of the sealing soft ring 29. In addition, the secondary protective ring 28 can form a water ring under the spray of the water curtain generator 6 to further seal the thickened flange ring 26. As a secondary insurance, it can minimize the risk of gas leakage at the connection between the shielding cover 2 and the reaction tank 1.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A graded treatment and recycling system for post-electroplating wastewater, comprising a reaction tank (1) and a shielding cover (2), characterized in that: The shielding cover (2) is detachably and fixedly connected to the reaction tank (1). The shielding cover (2) has several water inlet holes (3) on its periphery. The water inlet holes (3) are connected to water inlet pipes (4). A ball sealing device (5) is installed inside the water inlet holes (3). A water curtain generating device (6) is installed at the water inlet pipe (4). The ball sealing device (5) includes a receiving ring (7) fixedly connected to the shielding cover (2). The receiving ring (7) is located below the water inlet holes (3). A partial spherical surface is opened on one side of the receiving ring (7). The receiving ring (7) is provided with a support ring (8) at the bottom. The support ring (8) is fixedly connected to the inner wall of the shielding cover (2). A sealing ball (9) is placed on the receiving ring (7). Several water channels (10) are opened on the sealing ball (9). The sealing ball (9) is hollow inside. An installation hole (13) is opened on the top of the sealing ball (9). A top cover (14) is connected to the installation hole (13) by bolts. A connecting column (15) is provided at the bottom of the sealing ball (9). A counterweight bearing (16) is provided on the connecting column (15).

2. The electroplating wastewater graded treatment and recycling system according to claim 1, characterized in that, The top of the cover (2) is provided with a pressure expansion detection device (17). The pressure expansion detection device (17) includes a detection tube (18) fixedly connected to the top of the cover (2). A detection ball (19) is connected above the detection tube (18). The detection ball (19) is elastic. A pressure sensor (20) and an alarm are provided on the top of the detection ball (19).

3. The electroplating wastewater graded treatment and recycling system according to claim 2, characterized in that, A temporary air storage box (21) is provided on one side of the air pressure expansion detection device (17). The temporary air storage box (21) is connected to the detection ball (19) through a vent pipe (22). A pressure valve (23) is provided in the vent pipe (22). A spray head (24) and a container (25) are provided in the temporary air storage box (21).

4. The electroplating wastewater graded treatment and recycling system according to claim 1, characterized in that, The reaction tank (1) and the shielding cover (2) are connected by a thickened flange ring (26). The thickened flange ring (26) is provided with a leak-proof sealing ring inside and a secondary protective ring (28) is provided on the outside of the thickened flange ring (26).

5. The electroplating wastewater graded treatment and recycling system according to claim 4, characterized in that, The leak-proof sealing ring includes a sealing soft ring (29) and an M-shaped deformable ring (30), with the sealing soft ring (29) located inside the M-shaped deformable ring (30).

6. The electroplating wastewater graded treatment and recycling system according to claim 5, characterized in that, The secondary protective ring (28) includes a water collection ring (31) fixedly connected to the shielding cover (2). The bottom of the water collection ring (31) is fixedly connected to the thickened flange ring (26). The water collection ring (31) can collect the water falling from the water curtain generator (6).

7. The electroplating wastewater graded treatment and recycling system according to claim 1, characterized in that, A sealing post (36) is inserted into the water inlet pipe (4), and a number of sealing rings (37) are provided on the sealing post (36). A handle is provided on the sealing post (36), and a top protective cover (38) is provided on the shielding cover (2).

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