Method and device for removing heavy metals in electroplating wastewater

Abstract

The invention discloses an electroplating wastewater heavy metal removal method and device, and relates to the technical field of sewage treatment.The electroplating wastewater heavy metal removal device comprises a treatment pond, three water inlet pipes are arranged at the position, close to the top, of the rear side of the treatment pond in a penetrating mode and fixedly connected with the treatment pond, electromagnetic valves are installed on the water inlet pipes, and connecting grooves are formed in the positions, close to the top, of the left side and the right side of the treatment pond; l-shaped plates are arranged at the top of the treatment pond, when sediment needs to be salvaged, the two L-shaped plates are taken out from the top of the treatment pond and detached, bolts are rotated, the bolts are detached from the treatment pond and a limiting plate, a first air cylinder is rotated, the first air cylinder drives a rope and a hook to rotate, the limiting plate limits the first air cylinder, and a handle is sleeved with the hook; then the first air cylinder is started, the first air cylinder drives the hook to move upwards through the rope, the hook drives the filter plate to move upwards through the handle, and when the filter plate moves upwards, precipitates in the treatment pond are fished, so that the precipitates are treated.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a method and apparatus for removing heavy metals from electroplating wastewater. Background Technology

[0002] With the increasing awareness of environmental protection, the standards for industrial wastewater discharge are constantly being raised. Industrial wastewater with excessive heavy metal content is required to be treated before discharge, especially wastewater generated in electroplating production. This wastewater usually contains a lot of heavy metals. The heavy metals contained in electroplating wastewater not only threaten environmental protection and biodiversity, but also seriously affect human physical and mental health.

[0003] However, existing heavy metal removal devices for electroplating wastewater have some problems in use. The existing devices are not convenient for fully mixing wastewater and reagents. The mixing position is relatively fixed and it is not convenient to adjust the mixing position. At the same time, it is not convenient to add reagents. Manual addition is often required, which will increase labor costs. Moreover, the precipitates generated after the wastewater and reagents are mixed are not easy to be salvaged and treated in the existing technology. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for removing heavy metals from electroplating wastewater, comprising the following steps: Step 1: First, pour the electroplating wastewater into the electroplating wastewater heavy metal removal device. Prepare a sodium sulfide solution of a certain concentration and pour it into the electroplating wastewater heavy metal removal device to react with the electroplating wastewater. S2: Next, stir and mix the two to ensure that the reagent and wastewater are completely mixed and in contact; S3: Next, coagulant and flocculant are added in sequence, and the sediment in the wastewater is removed. Finally, the wastewater is discharged.

[0005] A heavy metal removal device for electroplating wastewater includes a treatment tank. Three inlet pipes are installed through the tank near its rear side and fixedly connected to it. Each inlet pipe is equipped with a solenoid valve. Connecting grooves are formed on both the left and right sides of the treatment tank near its top. An L-shaped plate is provided at the top of the treatment tank, with a slot formed at the center of each L-shaped plate. Two slots are interconnected. The sides of the two L-shaped plates furthest from the center of the treatment tank are located on the left and right sides, respectively. A through groove is formed on the side of the L-shaped plate furthest from the center of the treatment tank. Each component is equipped with an electric roller. A movable plate is fixedly connected to the side of the electric roller away from the treatment tank. A through hole is opened in the inner cavity of the movable plate near the front and rear sides. A first threaded rod is inserted through each through hole. The end of the first threaded rod near the treatment tank is fixedly connected to one side of the L-shaped plate. A fixed plate is fixedly connected to the end of the first threaded rod away from the treatment tank. A nut is threaded to the outer edge of the first threaded rod. The side of the nut near the treatment tank is fitted with the movable plate. The side of the electric roller away from the movable plate is fitted with the side wall of the connecting groove.

[0006] Preferably, a curved plate is fixedly connected to the front side of the treatment tank. Limiting grooves are formed on the top of the curved plate near both the front and rear sides. Movable columns are threaded through each limiting groove. Each movable column has an inner cavity, and a connecting hole is formed at the top of each movable column. The connecting hole and the cavity are interconnected. The diameter of the cavity is larger than the diameter of the connecting hole. Movable discs are movably connected to each cavity. Vertical rods are fixedly connected to the top of each movable disc. Connecting holes are threaded through the top of each vertical rod, and adjusting plates are fixedly connected to the top of each vertical rod. Two adjusting plates are located on top of the curved plate, and a fixing block is fixedly connected to the top of both adjusting plates. A housing is fixedly connected to the top of the fixing block.

[0007] Preferably, a second motor is provided at the center of the top of the box, and a second transmission rod is fixedly connected to the power output shaft of the second motor. The bottom end of the second transmission rod passes through the center of the top of the box, and several stirring rods are fixedly connected to the outer edge of the second transmission rod. Arc-shaped grooves are provided on the top of the box near the front and rear sides, and arc-shaped frames are fixedly connected in the arc-shaped grooves. A cover plate is attached to the top of each arc-shaped frame, and a hinge is provided on the side of the cover plate away from the second motor. The cover plate is movably connected to one side of the arc-shaped frame through the hinge.

[0008] Preferably, a horizontal hole is provided on the front side of the box near the top, a pump is fixedly connected to the front side of the box near the top, a fixed pipe is fixedly connected to the rear side of the pump, the end of the fixed pipe away from the pump passes through the horizontal hole and extends into the inner cavity of the box, connecting pipes are fixedly connected to both the left and right sides of the pump, telescopic pipes are fixedly connected to the ends of the connecting pipes away from the pump, fixed covers are fixedly connected to the rear ends of the telescopic pipes, Z-shaped plates are fixedly connected to the outer edges of the fixed covers, fixed rings are fixedly connected to the outer edges of the connecting pipes, and springs are sleeved on the outer edges of the telescopic pipes. The rear end of the spring is fixedly connected to the front side of the Z-shaped plate, and the front end of the spring is fixedly connected to the rear side of the fixed ring.

[0009] Preferably, a fixing plate is fixedly connected between the two movable columns, a U-shaped block is fixedly connected to the left side of the fixing plate, a swing plate is hinged to the inner cavity of the U-shaped block, a second cylinder is fixedly connected to the left side of the swing plate, a crossbar is fixedly connected to the rear side of the second cylinder, and the rear end of the crossbar is fixedly connected to the front side of the treatment pool.

[0010] Preferably, a filter plate is provided near the bottom of the inner cavity of the treatment tank, and a handle is fixedly connected to the top of the filter plate near the four corners, and each handle has a movable hole on its top.

[0011] Preferably, fixed columns are fixedly connected to the left and right sides of the treatment pool near the center. A U-shaped plate is fixedly connected to the end of each fixed column away from the treatment pool. A swing block is hinged to the inner cavity of each U-shaped plate. A first cylinder is fixedly connected to the bottom of each swing block. Two ropes are fixedly connected to the bottom of each first cylinder. A hook is fixedly connected to the end of each rope away from the first cylinder. Two first threaded holes are opened near the top and bottom of the left and right sides of the treatment pool. A limiting plate is fitted on the outer edge of each first cylinder near the bottom. A second threaded hole is opened on the front and rear sides of the inner cavity of the limiting plate. A bolt is threaded into each of the second threaded holes. One end of the bolt is threaded into the adjacent first threaded hole.

[0012] Preferably, the top of the two L-shaped plates is provided with a first motor. The power output shaft of the first motor is fixedly connected to a first transmission rod. The bottom end of the first transmission rod passes through two slots and extends into the inner cavity of the treatment tank. Four stirring plates are fixedly connected to the outer edge of the first transmission rod near the bottom. Connecting plates are attached to both the left and right sides of the inner cavity of the treatment tank. A support plate is fixedly connected to the side of the connecting plate near the first motor. The side of the support plate away from the connecting plate is fixedly connected to the adjacent L-shaped plate. The front and rear sides of the L-shaped plates are provided with third threaded holes. The front and rear sides of the two L-shaped plates are provided with mounting plates. Each mounting plate has two fourth threaded holes. A second threaded rod is threaded into each of the fourth threaded holes. One end of the second threaded rod is threaded into the adjacent third threaded hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the coordinated operation of the treatment tank, the first motor, the housing, and the electric roller, enables the preparation of a sodium sulfide solution to a specific concentration. After opening the cover, the solution is poured into the housing through an arc-shaped frame. The second cylinder is activated, causing the movable column to move to the right. This movable column, via a vertical rod, an adjusting plate, and a fixing block, moves the housing to the right, following the shape of a curved plate. When the adjusting plate reaches the center of the curved plate, the second cylinder is deactivated. The adjusting plate, through the fixing block, moves the housing upwards. During this movement, the Z-shaped plate gradually moves diagonally upwards. Originally, the Z-shaped plate was attached to one side of the treatment tank; it gradually moves above the treatment tank. A spring then drives the Z-shaped plate to move further upwards. The telescopic tube is stretched by the fixed cover, and the bent part below the Z-shaped plate will abut against the front of the treatment tank. The pump is turned on and absorbs the solution inside the tank. The solution finally enters the treatment tank through the fixed cover and comes into contact with the wastewater. The first motor is started here, and the first motor drives the stirring plate to rotate. The stirring plate stirs the solution and wastewater in the treatment tank to mix them thoroughly. The sulfiding agent causes the heavy metals in the wastewater to precipitate, forming visible precipitates. The precipitates will fall on the top of the filter plate. If it is necessary to expand the stirring range of the stirring plate, the electric roller is started. The electric roller moves back and forth in the connecting groove. The electric roller drives the first motor, the first transmission rod and the stirring plate to move back and forth through the L-shaped plate. When sediment needs to be retrieved, remove the two L-shaped plates from the top of the treatment tank and disassemble them. Turn the bolts to remove them from the treatment tank and the limiting plate. Turn the first cylinder, which will drive the rope and hook to rotate. The limiting plate will limit the first cylinder. Put the hook on the handle and start the first cylinder again. The first cylinder will drive the hook to move upward through the rope. The hook will drive the filter plate to move upward through the handle. As the filter plate moves upward, it will retrieve the sediment in the treatment tank, thus treating the sediment. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the L-shaped plate structure of the component of the present invention; Figure 4 This is a schematic diagram of the electric roller structure of the component of the present invention; Figure 5 This is a schematic diagram of the structure of the first cylinder of the component of the present invention; Figure 6 This is a schematic diagram of the component housing structure of the present invention; Figure 7This is a schematic diagram of the movable column structure of the component of the present invention; Figure 8 This is a schematic diagram of the rear view of the component housing of the present invention; Figure 9 This is an exploded view of the component housing of the present invention; Figure 10 This is a partial cross-sectional view of the movable column of the component of the present invention; Figure 11 This is a schematic diagram of the arc-shaped frame structure of the component of the present invention; Figure 12 This is a top view of the component housing of the present invention; Figure 13 This is a schematic diagram of the pump structure of the component of the present invention; Figure 14 This is a schematic diagram of the curved plate structure of the component of the present invention; Figure 15 This is a schematic diagram of the second motor structure of the component of the present invention; Figure 16 for Figure 3 Enlarged view of point A in the middle.

[0015] Labels in the diagram: 1. Treatment tank; 2. Inlet pipe; 3. L-shaped plate; 4. Curved plate; 5. First motor; 6. First transmission rod; 7. Stirring plate; 8. Filter plate; 9. Handle; 10. Support plate; 11. Connecting plate; 12. First threaded rod; 13. Fixed plate; 14. Movable plate; 15. Electric roller; 16. Nut; 17. U-shaped plate; 18. Fixed column; 19. Swing block; 20. First cylinder; 21. Limiting plate; 22. Bolt; 23. Rope; 24. Hook; 25. Box body; 26. 27. Adjusting plate; 28. Movable column; 29. ​​Second cylinder; 30. Horizontal bar; 31. Vertical bar; 32. Movable disc; 33. Fixed block; 34. Pump; 35. Connecting pipe; 36. Second motor; 37. Second transmission rod; 38. Stirring rod; 39. Fixed plate; 40. U-shaped block; 41. Swing plate; 42. Arc frame; 43. Cover plate; 44. Fixed ring; 45. Telescopic pipe; 46. Z-shaped plate; 47. Spring; 48. Fixed pipe; 49. Mounting plate; 50. Second threaded rod; 61. Fixed cover. Detailed Implementation

[0016] Please see Figure 1-16 This invention provides a technical solution: a method for removing heavy metals from electroplating wastewater, comprising the following steps: Step 1: First, pour the electroplating wastewater into the electroplating wastewater heavy metal removal device. Prepare a sodium sulfide solution of a certain concentration and pour it into the electroplating wastewater heavy metal removal device to react with the electroplating wastewater. S2: Next, stir and mix the two to ensure that the reagent and wastewater are completely mixed and in contact; S3: Next, coagulant and flocculant are added in sequence, and the sediment in the wastewater is removed. Finally, the wastewater is discharged.

[0017] A heavy metal removal device for electroplating wastewater includes a treatment tank 1. Three inlet pipes 2 are installed through the rear side of the treatment tank 1 near the top and are fixedly connected to it. Each inlet pipe 2 is equipped with a solenoid valve. Connection grooves are formed on both the left and right sides of the treatment tank 1 near the top. An L-shaped plate 3 is provided on the top of the treatment tank 1. A slot is formed at the center of the top of each L-shaped plate 3, and the two slots are interconnected. The sides of the two L-shaped plates 3 furthest from the center of the treatment tank 1 are located on the left and right sides of the treatment tank 1, respectively. A through groove is formed on the side of the L-shaped plate 3 furthest from the center of the treatment tank 1. An electric roller 15 passes through each through groove. A movable plate 14 is fixedly connected to the side of each electric roller 15 furthest from the treatment tank 1. Through holes are formed in the inner cavity of the movable plate 14 near the front and rear sides. A first threaded rod 12 passes through each through hole. The end of the first threaded rod 12 near the treatment tank 1 is fixedly connected to one side of the L-shaped plate 3, and the end of the first threaded rod 12 furthest from the treatment tank 1 is fixedly connected to... A fixed plate 13 is attached. Nuts 16 are threadedly connected to the outer edge of the first threaded rod 12. The side of the nut 16 near the treatment tank 1 is fitted with the movable plate 14. The side of the electric roller 15 away from the movable plate 14 is fitted with the side wall of the connecting groove. A curved plate 4 is fixedly connected to the front side of the treatment tank 1. Limiting grooves are opened at the top of the curved plate 4 near the front and rear sides. Movable columns 27 are passed through the limiting grooves. Holes are opened in the inner cavity of the movable columns 27. Connecting holes are opened at the top of the movable columns 27. The connecting holes and cavities are interconnected. The diameter of the cavity is larger than the diameter of the connecting hole. Movable plates 31 are movably connected in the cavity. Vertical rods 30 are fixedly connected to the top of the movable plates 31. Connecting holes are passed through the top of the vertical rods 30. Adjusting plates 26 are fixedly connected to the top of the vertical rods 30. Two adjusting plates 26 are located on the top of the curved plate 4. A fixing block 32 is fixedly connected to the top of the two adjusting plates 26. A box 25 is fixedly connected to the top of the fixing block 32. A second motor 35 is located at the center of the top of the housing 25. A second transmission rod 36 is fixedly connected to the power output shaft of the second motor 35. The bottom end of the second transmission rod 36 passes through the center of the top of the housing 25. Several stirring rods 37 are fixedly connected to the outer edge of the second transmission rod 36. Arc-shaped grooves are formed near the front and rear sides of the top of the housing 25. Arc-shaped frames 41 are fixedly connected within each arc-shaped groove. A cover plate 42 is fitted to the top of each arc-shaped frame 41. A hinge is provided on the side of the cover plate 42 away from the second motor 35. The cover plate 42 is movably connected to one side of the arc-shaped frame 41 via the hinge. A horizontal hole is formed near the top of the front side of the housing 25. A pump 33 is fixedly connected near the top of the front side of the housing 25. A fixed pipe 47 is fixedly connected to the rear side of the pump 33. The end of the fixed pipe 47 away from the pump 33 passes through the horizontal hole and extends into the inner cavity of the housing 25. 3. Connecting pipes 34 are fixedly connected to both the left and right sides. Telescopic pipes 44 are fixedly connected to the ends of connecting pipes 34 away from pump 33. Fixed covers 50 are fixedly connected to the ends of telescopic pipes 44 away from the rear end. Z-shaped plates 45 are fixedly connected to the outer edges of fixed covers 50. Fixed rings 43 are fixedly connected to the outer edges of connecting pipes 34. Springs 46 are sleeved on the outer edges of telescopic pipes 44. The rear end of springs 46 is fixedly connected to the front side of Z-shaped plates 45. The front end of springs 46 is fixedly connected to the rear side of fixed rings 43. Fixed plate 38 is fixedly connected between the two movable columns 27. U-shaped block 39 is fixedly connected to the left side of fixed plate 38. Swing plate 40 is hinged to the inner cavity of U-shaped block 39. Second cylinder 28 is fixedly connected to the left side of swing plate 40. Crossbar 29 is fixedly connected to the rear side of second cylinder 28. The rear end of crossbar 29 is fixedly connected to the front side of treatment tank 1. A filter plate 8 is installed near the bottom of the inner cavity of the treatment tank 1. A handle 9 is fixedly connected to the top of the filter plate 8 near each of the four corners. Each handle 9 has a movable hole at its top. Fixed posts 18 are fixedly connected to the left and right sides of the treatment tank 1 near the center. A U-shaped plate 17 is fixedly connected to the end of each fixed post 18 away from the treatment tank 1. A swing block 19 is hinged to the inner cavity of each U-shaped plate 17. A first cylinder 20 is fixedly connected to the bottom of each swing block 19. Two ropes 23 are fixedly connected to the bottom of each first cylinder 20. A hook 24 is fixedly connected to the end of each rope 23 away from the first cylinder 20. Two first threaded holes are opened near the top and bottom of the left and right sides of the treatment tank 1. A limiting plate 21 is fitted onto the outer edge of the first cylinder 20 near the bottom. Second threaded holes are opened on the front and rear sides of the inner cavity of the limiting plate 21. Bolts 22 are threaded into the second threaded holes, with one end of each bolt threaded. Connected to adjacent first threaded holes, the tops of the two L-shaped plates 3 are jointly provided with a first motor 5. The power output shaft of the first motor 5 is fixedly connected to a first transmission rod 6. The bottom ends of the first transmission rod 6 pass through two slots and extend into the inner cavity of the treatment tank 1. Four stirring plates 7 are fixedly connected to the outer edge of the first transmission rod 6 near the bottom. Connecting plates 11 are attached to both the left and right sides of the inner cavity of the treatment tank 1. Support plates 10 are fixedly connected to the side of the connecting plates 11 near the first motor 5. The side of the support plates 10 away from the connecting plates 11 is fixedly connected to the adjacent L-shaped plates 3. Third threaded holes are opened on both the front and rear sides of the L-shaped plates 3. Mounting plates 48 are jointly provided on both the front and rear sides of the two L-shaped plates 3. Two fourth threaded holes are opened on each mounting plate 48. Second threaded rods 49 are threadedly connected to each of the fourth threaded holes. One end of the second threaded rod 49 is threadedly connected to the adjacent third threaded hole.

[0018] Working principle: When the device starts working, the solenoid valve is opened, and the inlet pipe 2 transports the electroplating wastewater to the treatment tank 1. The solenoid valve is closed, and a sodium sulfide solution of a certain concentration is prepared. The cover plate 42 is opened, and the solution is poured into the tank 25 through the arc frame 41. The second motor 35 is started, which drives the second transmission rod 36 to rotate. The second transmission rod 36 drives the stirring rod 37 to rotate, and the stirring rod 37 stirs and mixes the solution. The second cylinder 28 is started, and the second cylinder 28 drives the fixed plate 38 to move to the right through the swing plate 40 and the U-shaped block 39. The fixed plate 38 drives the swing plate 28 to move to the right. The movable column 27 moves to the right, and through the vertical rod 30, adjusting plate 26, and fixing block 32, the movable column 27 drives the housing 25 to move to the right. The housing 25 moves along the shape of the curved plate 4. When the adjusting plate 26 moves to the center of the curved plate 4, the second cylinder 28 is closed. The adjusting plate 26 will drive the vertical rod 30 to move upward, and the vertical rod 30 will drive the movable plate 31 to move upward. The adjusting plate 26 will drive the housing 25 to move upward through the fixing block 32. During the movement of the housing 25, the Z-shaped plate 45 will gradually move diagonally upward. The Z-shaped plate 45, which was originally attached to one side of the treatment pool 1, will gradually move to the side of the treatment pool 1. Above, spring 46 will drive Z-shaped plate 45 to move. Z-shaped plate 45 will drive telescopic tube 44 to stretch through fixed cover 50. The bent part of Z-shaped plate 45 will abut against the front of treatment tank 1. Pump 33 will be turned on. Pump 33 will absorb the solution inside tank 25 through fixed tube 47 and enter the connecting tube 34, and then enter the telescopic tube 44. The solution will finally enter treatment tank 1 through fixed cover 50 and come into contact with wastewater. At this point, first motor 5 will be started. First motor 5 will drive first transmission rod 6 to rotate. First transmission rod 6 will drive stirring plate 7 to rotate. 7. Stir the solution and wastewater in treatment tank 1 to mix them thoroughly. The sulfiding agent causes the heavy metals in the wastewater to precipitate, forming visible precipitates. The precipitates will fall on the top of filter plate 8. If it is necessary to expand the stirring range of stirring plate 7, start electric roller 15. Electric roller 15 moves back and forth in the connecting groove. Electric roller 15 drives L-shaped plate 3 to move back and forth through movable plate 14 and first threaded rod 12. L-shaped plate 3 drives first motor 5, first transmission rod 6 and stirring plate 7 to move back and forth. The mounting plate 48, in conjunction with second threaded rod 49, can install two L-shaped plates 3. When sediment needs to be retrieved, first rotate nut 16 to move it away from electric roller 15, then move electric roller 15 away from the inside of the connecting groove on one side. Then move the two L-shaped plates 3 upward, which drive the first motor 5, the first transmission rod 6, and the stirring plate 7 upward to remove them from the top of the treatment tank 1. Then rotate bolt 22 to remove it from the treatment tank 1 and the limiting plate 21. Rotate the first cylinder 20, which drives the swing block 19 to rotate. The first cylinder 20 drives the rope... Rotate 23 and hook 24 to rotate the first cylinder 20 180 degrees, then put the limiting plate 21 back on the surface of the first cylinder 20 and limit the limiting plate 21 with bolt 22. The limiting plate 21 limits the first cylinder 20. Put the hook 24 on the handle 9 and start the first cylinder 20 again. The first cylinder 20 drives the hook 24 to move upward through the rope 23. The hook 24 drives the filter plate 8 to move upward through the handle 9. When the filter plate 8 moves upward, it will scoop up the sediment in the treatment tank 1, thereby treating the sediment.

Claims

1. A method for removing heavy metals from electroplating wastewater, characterized in that, Includes the following steps: Step 1: First, pour the electroplating wastewater into the electroplating wastewater heavy metal removal device. Prepare a sodium sulfide solution of a certain concentration and pour it into the electroplating wastewater heavy metal removal device to react with the electroplating wastewater. S2: Next, stir and mix the two to ensure that the reagent and wastewater are completely mixed and in contact; S3: Next, coagulant and flocculant are added in sequence, and the sediment in the wastewater is removed. Finally, the wastewater is discharged.

2. A heavy metal removal device for electroplating wastewater, comprising a treatment tank (1), characterized in that: Three water inlet pipes (2) are installed through the rear side of the treatment tank (1) near the top and are fixedly connected to it. Each water inlet pipe (2) is equipped with a solenoid valve. Connection slots are opened on the left and right sides of the treatment tank (1) near the top. An L-shaped plate (3) is provided on the top of the treatment tank (1). A slot is opened at the center of the top of each L-shaped plate (3). The two slots are interconnected. The sides of the two L-shaped plates (3) away from the center of the treatment tank (1) are located on the left and right sides of the treatment tank (1) respectively. A through groove is opened on the side of the L-shaped plate (3) away from the center of the treatment tank (1). An electric roller (15) is installed through each through groove. The electric roller (15) is located away from the center of the treatment tank (1). A movable plate (14) is fixedly connected to one side of the treatment tank (1). The inner cavity of the movable plate (14) is provided with through holes near the front and rear sides. A first threaded rod (12) is provided through each through hole. The end of the first threaded rod (12) near the treatment tank (1) is fixedly connected to one side of the L-shaped plate (3). The end of the first threaded rod (12) away from the treatment tank (1) is fixedly connected to a fixed plate (13). Nuts (16) are threadedly connected to the outer edge of the first threaded rod (12). The side of the nut (16) near the treatment tank (1) is fitted with the movable plate (14). The side of the electric roller (15) away from the movable plate (14) is fitted with the side wall of the connecting groove.

3. The heavy metal removal device for electroplating wastewater according to claim 2, characterized in that: A curved plate (4) is fixedly connected to the front side of the treatment pool (1). A limiting groove is opened on the top of the curved plate (4) near the front and rear sides. A movable column (27) is provided through the limiting groove. A cavity is opened in the inner cavity of the movable column (27). A connecting hole is opened at the top of the movable column (27). The connecting hole and the cavity are interconnected. The diameter of the cavity is larger than the diameter of the connecting hole. A movable disk (31) is movably connected in the cavity. A vertical rod (30) is fixedly connected to the top of the movable disk (31). A connecting hole is passed through the top of the vertical rod (30). An adjusting plate (26) is fixedly connected to the top of the vertical rod (30). The two adjusting plates (26) are located on the top of the curved plate (4). A fixing block (32) is fixedly connected to the top of the two adjusting plates (26). A box (25) is fixedly connected to the top of the fixing block (32).

4. The heavy metal removal device for electroplating wastewater according to claim 3, characterized in that: The top center of the box (25) is provided with a second motor (35), the power output shaft of the second motor (35) is fixedly connected to a second transmission rod (36), the bottom end of the second transmission rod (36) passes through the top center of the box (25), and a number of stirring rods (37) are fixedly connected to the outer edge of the second transmission rod (36). The top of the box (25) is provided with arc-shaped grooves near the front and rear sides, and arc-shaped frames (41) are fixedly connected in the arc-shaped grooves. The top of the arc-shaped frames (41) is fitted with a cover plate (42), and the side of the cover plate (42) away from the second motor (35) is provided with a hinge. The cover plate (42) is movably connected to one side of the arc-shaped frame (41) through the hinge.

5. The heavy metal removal device for electroplating wastewater according to claim 4, characterized in that: A horizontal hole is provided on the front side of the housing (25) near the top. A pump (33) is fixedly connected to the front side of the housing (25) near the top. A fixed pipe (47) is fixedly connected to the rear side of the pump (33). The end of the fixed pipe (47) away from the pump (33) passes through the horizontal hole and extends into the inner cavity of the housing (25). Connecting pipes (34) are fixedly connected to both the left and right sides of the pump (33). The ends of the connecting pipes (34) away from the pump (33) are fixedly connected to extension pipes. The telescopic tube (44) is fixedly connected to a fixed cover (50) away from the rear end. The outer edge of the fixed cover (50) is fixedly connected to a Z-shaped plate (45). The outer edge of the connecting tube (34) is fixedly connected to a fixed ring (43). The outer edge of the telescopic tube (44) is fitted with a spring (46). The rear end of the spring (46) is fixedly connected to the front side of the Z-shaped plate (45), and the front end of the spring (46) is fixedly connected to the rear side of the fixed ring (43).

6. The heavy metal removal device for electroplating wastewater according to claim 5, characterized in that: A fixed plate (38) is fixedly connected between the two movable columns (27). A U-shaped block (39) is fixedly connected to the left side of the fixed plate (38). A swing plate (40) is hinged to the inner cavity of the U-shaped block (39). A second cylinder (28) is fixedly connected to the left side of the swing plate (40). A crossbar (29) is fixedly connected to the rear side of the second cylinder (28). The rear end of the crossbar (29) is fixedly connected to the front side of the treatment pool (1).

7. The heavy metal removal device for electroplating wastewater according to claim 6, characterized in that: The treatment tank (1) has a filter plate (8) near the bottom of its inner cavity. Each filter plate (8) has a handle (9) fixedly connected to its top near the four corners. Each handle (9) has a movable hole on its top.

8. The heavy metal removal device for electroplating wastewater according to claim 7, characterized in that: The treatment pool (1) is fixedly connected to a fixed column (18) near the center on both sides. A U-shaped plate (17) is fixedly connected to the end of the fixed column (18) away from the treatment pool (1). A swing block (19) is hinged to the inner cavity of the U-shaped plate (17). A first cylinder (20) is fixedly connected to the bottom of the swing block (19). Two ropes (23) are fixedly connected to the bottom of the first cylinder (20). A hook (24) is fixedly connected to the end of the rope (23) away from the first cylinder (20). Two first threaded holes are opened near the top and bottom on both sides of the treatment pool (1). A limiting plate (21) is sleeved on the outer edge of the first cylinder (20) near the bottom. A second threaded hole is opened on both the front and back sides of the inner cavity of the limiting plate (21). A bolt (22) is threadedly connected to the second threaded hole. One end of the bolt (22) is threadedly connected to the adjacent first threaded hole.

9. The heavy metal removal device for electroplating wastewater according to claim 8, characterized in that: The top of the two L-shaped plates (3) is provided with a first motor (5). The power output shaft of the first motor (5) is fixedly connected to a first transmission rod (6). The bottom end of the first transmission rod (6) passes through two slots and extends into the inner cavity of the treatment tank (1). Four stirring plates (7) are fixedly connected to the outer edge of the first transmission rod (6) near the bottom. The left and right sides of the inner cavity of the treatment tank (1) are fitted with connecting plates (11). The side of the connecting plate (11) near the first motor (5) is fixedly connected with a support plate (10). The side of the support plate (10) away from the connecting plate (11) is fixedly connected to the adjacent L-shaped plate (3). The front and rear sides of the L-shaped plate (3) are provided with third threaded holes. The front and rear sides of the two L-shaped plates (3) are provided with mounting plates (48). The mounting plates (48) are provided with two fourth threaded holes. The fourth threaded holes are threaded with second threaded rods (49). One end of the second threaded rod (49) is threaded into the adjacent third threaded hole.

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