Electrolytic deposition and recovery device for heavy metals in electroplating wastewater

Abstract

The application provides an electrolytic deposition recovery device for electroplating wastewater heavy metals, and relates to the technical field of electroplating wastewater recovery, comprising an electrolytic tank, a deposit scraping and filtering assembly is arranged, the lifting plate can be lifted to lift the stirring rod, the sealing gate is slid out from the inside of the sealing sliding groove, the wastewater can enter the inside of the water guide cover through the drain hole, and the wastewater is discharged through the drain pipeline, the stirring rod can scrape the excess solid impurities through the cleaning scraping hole above the movable disc after being above, and the movement of the water pushing scraper is not affected, the moving plate can drive the sliding rod and the water pushing scraper to slide after being moved, the water pushing scraper pushes the metal deposited on the cathode surface into the inside of the water guide cover, and the solid matter collecting drawer can collect the solid matter, so that the device is convenient to operate, and the collection of the solid deposits and the cleaning of the cathode are convenient and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of electroplating wastewater recycling technology, and in particular to a device for the electrolytic deposition and recycling of heavy metals in electroplating wastewater. Background Technology

[0002] Due to the large amount of pollution generated by the electroplating industry, in order to protect the environment and facilitate management, various provinces and cities have centralized electroplating enterprises into electroplating industrial parks for unified operation and management. The large amount of wastewater generated during the operation of electroplating plants originates from pre-plating treatment, plating rinsing, post-treatment, washing workshop floors, and leaks in plating tanks caused by improper operation or management, including various tank solutions and water used for spills. The main heavy metals contained are chromium, cadmium, lead, copper, nickel, and zinc. If discharged into the environment, heavy metal ions will accumulate through drinking water and the food chain, causing more widespread and serious harm to humans.

[0003] When performing sedimentation and recycling of wastewater after removing suspended solids and oil, most existing electrolytic cells are equipped with stirring devices to improve electrolysis efficiency. However, after electrolysis, a lot of solids remain above the stirring device, and the cathode in the electrolytic cell needs to be disassembled, the elemental metal on the cathode surface scraped off, and then reinstalled. This makes the operation cumbersome and requires a long downtime, which greatly reduces work efficiency. Therefore, we propose a heavy metal electrolytic deposition and recycling device for electroplating wastewater. Utility Model Content

[0004] In view of this, this application provides a device for the electrolytic deposition and recovery of heavy metals from electroplating wastewater, aiming to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electrolytic deposition and recovery device for heavy metals in electroplating wastewater includes an electrolytic tank, wherein multiple cathodes and anodes are embedded in the bottom inner wall of the electrolytic tank, a support frame is fixedly installed on the top of the electrolytic tank, and an electrolytic deposition stirring assembly for heavy metals in electroplating wastewater is provided on the electrolytic tank and the support frame.

[0007] The electroplating wastewater heavy metal electrolytic deposition stirring assembly includes a first lead screw, a limiting rod, a lifting plate, a sealing gate, and a sealing groove. The first lead screw is rotatably installed at the bottom of the support frame. The limiting rod is fixedly installed on the front and rear sides of the top of the support frame. The lifting plate is threaded on the outside of the first lead screw and slidably installed on the outside of the limiting rod. The sealing gate is fixedly installed at the bottom of the lifting plate. The sealing groove is opened at the top of the electrolysis tank, and the sealing gate and the sealing groove are in contact.

[0008] Preferably, a wastewater inlet pipe is fixedly installed on the top of the electrolysis tank, and a buffer slope is fixedly installed on the bottom inner wall of the electrolysis tank. The buffer slope is located below the wastewater inlet pipe, and a sediment scraping and filtering assembly is provided on the electroplating wastewater heavy metal electrolytic deposition stirring assembly, the electrolysis tank, and the buffer slope.

[0009] Preferably, the electroplating wastewater heavy metal electrolytic deposition stirring assembly further includes a drain hole, a first motor, a turntable, a movable disc, and stirring rods. The drain hole is located on the left side of the electrolysis tank. The first motor is fixedly installed on the top of the lifting plate. The turntable is fixedly installed on the output end of the first motor. The movable disc is rotatably installed on the top of the electrolysis tank. Multiple stirring rods are fixedly installed on the bottom of the movable disc and slidably installed on the inner side of the movable disc.

[0010] Preferably, the sediment scraping and filtering assembly includes a fixed base, a second motor, a second lead screw, a bevel gear, a guide rod, a movable plate, a slide rod, and a water-pushing scraper. The fixed base is fixedly installed on the top of the electrolysis tank. The second motor is fixedly installed on one side of the fixed base. The second lead screw is fixedly installed on the output end of the second motor. The bevel gear is fixedly installed on the outside of the second lead screw and the first lead screw, with adjacent bevel gears meshing. The guide rod is fixedly installed on the fixed base and the support frame. The movable plate is threaded onto the outside of the second lead screw and slidably installed on the outside of the guide rod. The slide rod is fixedly installed on one side of the movable plate and slidably installed on the inside of the electrolysis tank and the buffer slope. The water-pushing scraper is fixedly installed on one side of the slide rod and abuts against the bottom inner wall of the electrolysis tank, as well as the cathode and anode.

[0011] Preferably, the sediment scraping and filtering assembly further includes a water guide cover, a solids collection drawer, a water collection frame, and a drain pipe. The water guide cover is fixedly installed on the left side of the drain hole, the solids collection drawer is fixedly installed on the bottom of the water guide cover, the water collection frame is fixedly installed on the bottom of the water guide cover, and the drain pipe is fixedly installed on the bottom of the water collection frame.

[0012] Preferably, a sealing ring is provided on the inner side wall of the sealing groove, a sealing ring is fixedly installed on the bottom of the sealing gate, and a sealing ring is provided at the connection between the drain hole and the water guide cover.

[0013] Preferably, the bottom inner wall of the electrolysis tank is provided with multiple embedded mounting slots, and the cathode and anode are fixedly installed inside the embedded mounting slots, with the cathode and anode located on the same straight line as the bottom inner wall of the electrolysis tank.

[0014] Preferably, the top of the movable disc is provided with a cleaning scraper hole, and the stirring rod is slidably installed inside the cleaning scraper hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The present invention provides a heavy metal electrolytic deposition and recovery device for electroplating wastewater. By setting up an electroplating wastewater heavy metal electrolytic deposition stirring component, when the wastewater after removing suspended solids and oil is deposited and recovered, the pretreated wastewater can be added into the interior of the electrolytic tank through the wastewater inlet pipe. The buffer slope can buffer the wastewater and let it fall at a uniform speed. After the addition is completed, the cathode and anode can be energized. Through electrochemical oxidation-reduction reaction, by passing direct current into the electroplating wastewater containing heavy metal ions, the heavy metal ions can gain electrons on the cathode surface and be converted from the ionic state into elemental metal or alloy deposition, thereby realizing the separation of heavy metals from wastewater. After the reaction is completed, the heavy metals can be deposited on the surface of the cathode.

[0017] (2) The present invention provides a heavy metal electrolytic deposition and recovery device for electroplating wastewater. Through the set sediment scraping and filtering components, the lifting plate can be raised and the stirring rod can be lifted, and the sealing gate can be slid out from the inside of the sealing groove. Wastewater can enter the inside of the water guide hood through the drain hole and be discharged through the drain pipe. After the stirring rod is in the upper position, it can scrape off excess solid debris through the cleaning scraper hole above the movable plate without affecting the movement of the pusher scraper. After the movable plate moves, it can drive the slide rod and the pusher scraper to slide, and the pusher scraper pushes the metal deposited on the cathode surface into the inside of the water guide hood. The solid collection drawer can collect solids, making the device easier to operate. The collection of solid sediments and the cleaning of the cathode are more convenient and labor-saving in the later stage.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a heavy metal electrolytic deposition and recovery device for electroplating wastewater proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of a three-dimensional view of a partial structure of an electrolytic deposition and recovery device for heavy metals in electroplating wastewater according to an embodiment of this application;

[0021] Figure 3 This illustration shows a schematic diagram of a three-dimensional view of the structure of an explosive section of a heavy metal electrolytic deposition and recovery device for electroplating wastewater, according to an embodiment of this application.

[0022] Figure 4 A schematic diagram showing a three-dimensional view of a portion of the structure of a first lead screw and a second lead screw provided according to an embodiment of this application is shown.

[0023] Figure label:

[0024] 1. Electroplating wastewater heavy metal electrolytic deposition stirring assembly; 2. Sediment scraping and filtration assembly; 3. Electrolysis tank; 4. Cathode; 5. Anode; 6. Wastewater inlet pipe; 7. Buffer slope; 8. Support frame;

[0025] 11. First lead screw; 12. Limiting rod; 13. Lifting plate; 14. Sealing gate; 15. Sealing groove; 16. Drain hole; 17. First motor; 18. Turntable; 19. Movable plate; 20. Stirring rod;

[0026] 21. Fixed base; 22. Second motor; 23. Second lead screw; 24. Bevel gear; 25. Guide rod; 26. Moving plate; 27. Slide rod; 28. Water pusher scraper; 29. ​​Water guide cover; 30. Solid material collection drawer; 31. Water collection frame; 32. Drainage pipe. Detailed Implementation

[0027] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;

[0028] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] refer to Figure 1-4 An electrolytic deposition and recovery device for heavy metals in electroplating wastewater is characterized by comprising an electrolytic tank 3, wherein a plurality of cathodes 4 and anodes 5 are embedded in the bottom inner wall of the electrolytic tank 3, a support frame 8 is fixedly installed on the top of the electrolytic tank 3, and an electrolytic deposition and stirring assembly 1 for heavy metals in electroplating wastewater is provided on the electrolytic tank 3 and the support frame 8.

[0030] The electroplating wastewater heavy metal electrolytic deposition stirring assembly 1 includes a first lead screw 11, a limiting rod 12, a lifting plate 13, a sealing gate 14, and a sealing groove 15. The first lead screw 11 is rotatably installed at the bottom of the support frame 8. The limiting rod 12 is fixedly installed on the front and rear sides of the top of the support frame 8. The lifting plate 13 is threaded on the outside of the first lead screw 11 and slidably installed on the outside of the limiting rod 12. The sealing gate 14 is fixedly installed at the bottom of the lifting plate 13. The sealing groove 15 is opened at the top of the electrolysis tank 3, and the sealing gate 14 and the sealing groove 15 are in contact.

[0031] In this embodiment, a wastewater inlet pipe 6 is fixedly installed on the top of the electrolysis tank 3, and a buffer slope 7 is fixedly installed on the bottom inner wall of the electrolysis tank 3. The buffer slope 7 is located below the wastewater inlet pipe 6. A sediment scraping and filtering assembly 2 is installed on the electroplating wastewater heavy metal electrolytic deposition stirring assembly 1, the electrolysis tank 3 and the buffer slope 7.

[0032] In this embodiment, the electroplating wastewater heavy metal electrolytic deposition stirring assembly 1 further includes a drain hole 16, a first motor 17, a turntable 18, a movable disc 19, and stirring rods 20. The drain hole 16 is located on the left side of the electrolysis tank 3. The first motor 17 is fixedly installed on the top of the lifting plate 13. The turntable 18 is fixedly installed on the output end of the first motor 17. The movable disc 19 is rotatably installed on the top of the electrolysis tank 3. Multiple stirring rods 20 are fixedly installed on the bottom of the movable disc 19 and slidably installed on the inner side of the movable disc 19.

[0033] In this embodiment, the sediment scraping and filtering assembly 2 includes a fixed base 21, a second motor 22, a second lead screw 23, a bevel gear 24, a guide rod 25, a moving plate 26, a sliding rod 27, and a water-pushing scraper 28. The fixed base 21 is fixedly installed on the top of the electrolysis tank 3. The second motor 22 is fixedly installed on one side of the fixed base 21. The second lead screw 23 is fixedly installed on the output end of the second motor 22. The bevel gear 24 is fixedly installed on the outside of the second lead screw 23 and the first lead screw 11, with adjacent bevel gears 24 meshing. The guide rod 25 is fixedly installed on the fixed base 21 and the support frame 8. The moving plate 26 is threaded on the outside of the second lead screw 23 and slidably installed on the outside of the guide rod 25. The sliding rod 27 is fixedly installed on one side of the moving plate 26 and slidably installed on the inside of the electrolysis tank 3 and the buffer slope 7. The water-pushing scraper 28 is fixedly installed on one side of the sliding rod 27 and abuts against the bottom inner wall of the electrolysis tank 3, as well as the cathode 4 and the anode 5.

[0034] In this embodiment, the sediment scraping and filtering assembly 2 also includes a water guide cover 29, a solid collection drawer 30, a water collection frame 31, and a drain pipe 32. The water guide cover 29 is fixedly installed on the left side of the drain hole 16, the solid collection drawer 30 is fixedly installed on the bottom of the water guide cover 29, the water collection frame 31 is fixedly installed on the bottom of the water guide cover 29, and the drain pipe 32 is fixedly installed on the bottom of the water collection frame 31. The water guide cover 29 is trapezoidal in shape and fits snugly against the drain hole 16, which facilitates the flow of water into the interior of the water guide cover 29. The solid collection drawer 30 allows for solid-liquid separation, which is convenient for workers to collect solid metal later.

[0035] In this embodiment, a sealing ring is provided on the inner side wall of the sealing groove 15, a sealing ring is fixedly installed on the bottom of the sealing gate 14, and a sealing ring is provided at the connection between the drain hole 16 and the water guide cover 29; the sealing ring can prevent water leakage during the use of the device and can achieve a good sealing effect.

[0036] In this embodiment, the bottom inner wall of the electrolysis tank 3 is provided with multiple embedded mounting slots. The cathode 4 and anode 5 are fixedly installed inside the embedded mounting slots. The cathode 4 and anode 5 are located on the same straight line as the bottom inner wall of the electrolysis tank 3. The water-pushing scraper 28 can scrape off the metal objects attached to the surface of the cathode 4 during the movement process without damaging the cathode 4 and anode 5.

[0037] In this embodiment, a cleaning scraper hole is provided on the top of the movable disc 19, and the stirring rod 20 is slidably installed inside the cleaning scraper hole. The cleaning scraper hole allows the stirring rod 20 to scrape and clean the adhering substances on its outer surface after it rises, and the stirring rod 20 will not interfere with the movement of the water pushing scraper 28 after it rises.

[0038] Specifically, during the sedimentation and recovery of wastewater after removing suspended solids and oil, the pretreated wastewater can be added to the electrolysis tank 3 through wastewater inlet pipe 6. The buffer slope 7 buffers the wastewater, allowing it to fall at a uniform speed. After addition, the cathode 4 and anode 5 can be energized. Through an electrochemical oxidation-reduction reaction, by passing direct current into the electroplating wastewater containing heavy metal ions, the heavy metal ions gain electrons on the surface of the cathode 4, transforming from an ionic state into elemental metals or alloys for deposition, thus achieving the separation of heavy metals from the wastewater. This reaction is existing technology and therefore not described in detail here. After the reaction is complete, the heavy metals can be deposited on the surface of the cathode 4. At this time, the second motor 22 can be started. The second motor 22 can drive the second lead screw 23 to rotate. The second lead screw 23 drives the first lead screw 11 to rotate through the bevel gear 24, allowing the second lead screw 11 to rotate. The lead screw 23 and the first lead screw 11 drive the moving plate 26 and the lifting plate 13 to move respectively through threaded engagement. The lifting plate 13 can rise and lift the stirring rod 20, allowing the sealing gate 14 to slide out from the inside of the sealing groove 15, so that wastewater can enter the interior of the water guide cover 29 through the drain hole 16 and be discharged through the drain pipe 32. After the stirring rod 20 is in the upper position, it can scrape off excess solid debris through the cleaning scraper hole above the movable plate 19 without affecting the movement of the water pusher scraper 28. After the moving plate 26 moves, it can drive the slide rod 27 and the water pusher scraper 28 to slide, and the water pusher scraper 28 pushes the metal deposited on the surface of the cathode 4 into the interior of the water guide cover 29. The solid collection drawer 30 can collect solids, making the device easier to operate and the subsequent collection of solid deposits and cleaning of the cathode 4 more convenient and labor-saving.

[0039] It should be noted that although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for the electrolytic deposition and recovery of heavy metals from electroplating wastewater, characterized in that, include: An electrolytic tank (3) is provided with multiple cathodes (4) and anodes (5) embedded in the bottom inner wall of the electrolytic tank (3). A support frame (8) is fixedly installed on the top of the electrolytic tank (3). An electroplating wastewater heavy metal electrolytic deposition stirring assembly (1) is provided on the electrolytic tank (3) and the support frame (8). The electroplating wastewater heavy metal electrolytic deposition stirring assembly (1) includes a first lead screw (11), a limiting rod (12), a lifting plate (13), a sealing gate (14), and a sealing groove (15). The first lead screw (11) is rotatably installed at the bottom of the support frame (8). The limiting rod (12) is fixedly installed on the front and rear sides of the top of the support frame (8). The lifting plate (13) is threaded on the outside of the first lead screw (11) and slidably installed on the outside of the limiting rod (12). The sealing gate (14) is fixedly installed at the bottom of the lifting plate (13). The sealing groove (15) is opened at the top of the electrolytic tank (3). The sealing gate (14) and the sealing groove (15) are in contact with each other.

2. The device for electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 1, characterized in that, Wastewater inlet pipe (6) is fixedly installed on the top of the electrolysis tank (3), and buffer slope (7) is fixedly installed on the bottom inner wall of the electrolysis tank (3). The buffer slope (7) is located below the wastewater inlet pipe (6). Deposit scraping and filtering components (2) are installed on the electroplating wastewater heavy metal electrolytic deposition stirring assembly (1), the electrolysis tank (3) and the buffer slope (7).

3. The device for electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 1, characterized in that, The electroplating wastewater heavy metal electrolytic deposition stirring assembly (1) also includes a drain hole (16), a first motor (17), a turntable (18), a movable disc (19), and stirring rods (20). The drain hole (16) is located on the left side of the electrolytic tank (3). The first motor (17) is fixedly installed on the top of the lifting plate (13). The turntable (18) is fixedly installed on the output end of the first motor (17). The movable disc (19) is rotatably installed on the top of the electrolytic tank (3). Multiple stirring rods (20) are fixedly installed on the bottom of the movable disc (19) and slidably installed on the inner side of the movable disc (19).

4. The device for electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 2, characterized in that, The sediment scraping and filtering assembly (2) includes a fixed base (21), a second motor (22), a second lead screw (23), a bevel gear (24), a guide rod (25), a moving plate (26), a slide rod (27), and a water-pushing scraper (28). The fixed base (21) is fixedly installed on the top of the electrolysis tank (3). The second motor (22) is fixedly installed on one side of the fixed base (21). The second lead screw (23) is fixedly installed at the output end of the second motor (22). The bevel gear (24) is fixedly installed on the outside of the second lead screw (23) and the first lead screw (11). Two adjacent... The bevel gear (24) meshes with each other, the guide rod (25) is fixedly installed on the fixed seat (21) and the support frame (8), the moving plate (26) is threaded on the outside of the second lead screw (23) and slidably installed on the outside of the guide rod (25), the slide rod (27) is fixedly installed on one side of the moving plate (26), the slide rod (27) is slidably installed on the inside of the electrolysis tank (3) and the buffer ramp (7), the water pusher scraper (28) is fixedly installed on one side of the slide rod (27), and the water pusher scraper (28) abuts against the bottom inner wall of the electrolysis tank (3) and the cathode (4) and anode (5).

5. A device for the electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 4, characterized in that, The sediment scraping filter assembly (2) also includes a water guide cover (29), a solids collection drawer (30), a water collection frame (31), and a drain pipe (32). The water guide cover (29) is fixedly installed on the left side of the drain hole (16), the solids collection drawer (30) is fixedly installed on the bottom of the water guide cover (29), the water collection frame (31) is fixedly installed on the bottom of the water guide cover (29), and the drain pipe (32) is fixedly installed on the bottom of the water collection frame (31).

6. The device for electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 3, characterized in that, The inner wall of the sealing groove (15) is provided with a sealing ring, the bottom of the sealing gate (14) is fixedly installed with a sealing ring, and the connection between the drain hole (16) and the water guide cover (29) is provided with a sealing ring.

7. The device for electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 1, characterized in that, The bottom inner wall of the electrolytic tank (3) is provided with multiple embedded mounting slots. The cathode (4) and anode (5) are fixedly installed inside the embedded mounting slots. The cathode (4) and anode (5) are located on the same straight line as the bottom inner wall of the electrolytic tank (3).

8. A device for the electrolytic deposition and recovery of heavy metals in electroplating wastewater according to claim 3, characterized in that, The top of the movable disc (19) is provided with a cleaning scraper hole, and the stirring rod (20) is slidably installed inside the cleaning scraper hole.

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