A nickel surface treatment wastewater treatment system and method

Abstract

The present invention discloses a nickel surface treatment wastewater treatment system and method, including a sedimentation tank. On both sides of the top of the sedimentation tank, first chutes are provided. In both of the two first chutes, first sliders are slidably connected. The two first sliders are respectively slidably arranged on both sides of the bottom end of a first slide plate. On both sides of the top end of the first slide plate, support blocks are fixedly provided. On one side of one of the support blocks, a first support rod is fixedly provided. On both sides of the first support rod, a plurality of stirring rods are fixedly provided. In the nickel surface treatment wastewater treatment system and method of the present invention, through the setting of a rotating cylinder and a stirring shaft, during the movement of the first slide plate, through the meshing action of a second rack and a second gear, and in cooperation with the transmission action of a first bevel gear and a second bevel gear, the rotating cylinder is driven to rotate, and the complexing agent in the rotating cylinder is evenly sprayed into the sedimentation tank through a liquid outlet, so that the complexing agent is evenly distributed in the wastewater in the sedimentation tank, facilitating the uniform and sufficient reaction between the complexing agent and the wastewater.

Description

Technical Field

[0001] The present invention relates to wastewater treatment, and particularly to a nickel surface treatment wastewater treatment system and method. Background Art

[0002] Electroplating is to deposit the required coating on the surface of the product through an electrochemical method to achieve protection, modification of the metal or non-metal surface, and endow the product with new properties, etc. In recent years, the electroplating industry in China has developed rapidly. As the main method of metal surface modification, nickel plating will generate a large amount of nickel-containing wastewater during the process. According to incomplete statistics, 4 billion cubic meters of electroplating wastewater are discharged every year, and 50% of them do not meet the discharge standards. The pollutants in electroplating wastewater are difficult to biodegrade and are easy to accumulate in organisms, which will pose a serious threat to the environment and humans if discharged into the environment.

[0003] In the prior art, when treating nickel-containing wastewater, multiple treatment processes are required, and only after the treatment is completed can the clean wastewater be discharged. In wastewater treatment, the following main defects exist:

[0004] 1. When treating nickel-containing wastewater, a complexing agent breaker needs to be added to the wastewater for sedimentation. When adding the complexing agent breaker, it is mostly directly added to the wastewater. At this time, the complexing agent breaker is mostly concentrated in one area, resulting in less complexing agent breaker in other areas, thus causing the wastewater not to react and sediment sufficiently, reducing the sedimentation effect of the wastewater;

[0005] 2. When cleaning the sedimented sludge, since the sludge is in a wet and muddy state, it is easy to cause incomplete cleaning during the cleaning process, leaving some sludge in the sedimentation tank, which is likely to cause environmental pollution and reduce the sludge cleaning effect. Summary of the Invention

[0006] The purpose of the present invention is to provide a nickel surface treatment wastewater treatment system and method to solve the problems of insufficient sedimentation reaction and residual sludge mentioned in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solutions: A nickel surface treatment wastewater treatment system and method, including a sedimentation tank. On both sides of the top of the sedimentation tank, first chutes are provided. In both of the first chutes, first sliders are slidably connected. The two first sliders are respectively slidably arranged on both sides of the bottom end of a first slide plate. On both sides of the top end of the first slide plate, support blocks are fixedly provided. On one side of one of the support blocks, a first support rod is fixedly provided. On both sides of the first support rod, a plurality of stirring rods are fixedly provided. The outer wall of the first support rod is rotatably connected with a rotating cylinder. A plurality of liquid outlets are provided on the outer wall of the rotating cylinder. On one side of the rotating cylinder, a second support rod is fixedly provided. The second support rod is rotatably arranged on one side of the other support block. The bottom end of the first slide plate is rotatably connected with a plurality of stirring shafts. On both sides of the plurality of stirring shafts, a plurality of stirring blades are symmetrically and fixedly provided;

[0008] In the middle of both sides of the inner wall of the sedimentation tank, second chutes are provided. In both of the second chutes, second sliders are slidably connected. The two second sliders are respectively fixedly arranged on both sides of a second slide plate. A through groove is provided at the bottom end of the second slide plate. In the through groove, a first airbag is fixedly provided. At the bottom end of the first airbag, a scraping plate is fixedly provided. The scraping plate is inserted and connected with the through groove. At the bottom ends of the two second sliders, pressing plates are fixedly provided. At the bottom ends of the two pressing plates, second airbags are respectively attached. The two second airbags are respectively fixedly arranged in two grooves. The two grooves are respectively provided at the bottom ends of the inner walls of the two second chutes. The two second airbags are both fixedly communicated with exhaust pipes through connecting pipes. On one side of both of the exhaust pipes, a plurality of nozzles are fixedly communicated. The plurality of nozzles are respectively fixedly provided on both sides of the inner wall of the sedimentation tank. On one side of the two second sliders, friction strips are provided. The two friction strips are respectively fixedly provided on one side of the inner walls of the two second chutes.

[0009] As a preferred technical solution of the present invention, a first rack is fixedly provided at the top of one side of the inner wall of the sedimentation tank. The first rack is meshed and connected with a first gear. The first gear is rotatably arranged on one side of the bottom end of the first slide plate through a first rotating shaft.

[0010] As a preferred technical solution of the present invention, a first sprocket is fixedly sleeved on the outer wall of the first rotating shaft. The first sprocket is connected with a plurality of second sprockets through a chain. The plurality of second sprockets are respectively fixedly sleeved on the outer walls of the plurality of stirring shafts.

[0011] As a preferred technical solution of the present invention, a second rack is fixedly provided at the top of the other side of the inner wall of the sedimentation tank. The second rack is meshed and connected with a second gear. The second gear is rotatably arranged on the other side of the bottom end of the first slide plate through a second rotating shaft.

[0012] As a preferred technical solution of the present invention, a first bevel gear is fixedly provided at the top end of the second rotating shaft, the first bevel gear is meshed with a second bevel gear, and the second bevel gear is fixedly arranged at one end of the second support rod.

[0013] As a preferred technical solution of the present invention, auxiliary rods are fixedly provided on one side of each of the two support blocks, auxiliary blocks are fixedly provided at one end of each of the two auxiliary rods, the two auxiliary blocks are respectively slidably arranged in two annular grooves, and the two annular grooves are respectively opened on both sides of the rotating cylinder.

[0014] As a preferred technical solution of the present invention, fixing rods are fixedly provided on one side of the first sliding plate and one side of the second sliding plate, the two fixing rods are respectively clamped with fixing grooves, and the two fixing grooves are respectively opened on one side of the inner wall of the sedimentation tank.

[0015] As a preferred technical solution of the present invention, side plates are hinged on both sides of the scraper, scrapers are fixedly provided at one end of each of the two side plates, springs are fixedly provided on one side of each of the two side plates, and one end of each of the two springs is respectively fixedly arranged at both ends of one side of the scraper.

[0016] A nickel surface treatment wastewater treatment system and method, characterized in that the rotating cylinder and the stirring shaft rotate synchronously, so as to uniformly spray the complexing agent while mixing and stirring the complexing agent and the wastewater to make them evenly mixed, and then let them stand in the sedimentation tank for sedimentation and standing.

[0017] As a preferred technical solution of the present invention, during the movement of the second slider, through frictional contact with the friction strip, and then through the action of the pressing plate, the second air bag, the exhaust pipe and the nozzle, hot steam is introduced into the sedimentation tank to dry the sludge settled in the sedimentation tank. At the same time, during the continuous friction between the second slider and the friction strip, the first air bag expands, driving the scraper to move downward to scrape and clean the sludge in the sedimentation tank, and as the first air bag expands, the depth of the scraper inserted into the sludge becomes deeper and deeper.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Through the settings of the rotary drum and the stirring shaft, during the movement of the first slide plate, through the meshing of the second rack and the second gear, and in cooperation with the transmission of the first bevel gear and the second bevel gear, the rotation of the rotary drum is driven, and the complexing agent in the rotary drum is evenly sprayed into the sedimentation tank through the liquid outlet, so that the complexing agent is evenly distributed in the wastewater in the sedimentation tank, facilitating the uniform and sufficient reaction of the complexing agent with the wastewater. At the same time, through the meshing of the first rack and the first gear, and in cooperation with the transmission of the first sprocket, the chain and the second sprocket, the rotation of the stirring shaft and the stirring blades is driven, and the complexing agent and the wastewater are fully mixed and stirred, enabling the complexing agent to fully react, thus facilitating the full sedimentation of the wastewater and improving the sedimentation effect of the wastewater.

[0020] 2. Through the settings of the second slider, the friction strip, the first airbag and the second airbag, during the movement of the second slide plate, the second slider is driven to come into frictional contact with the friction strip, and the heat generated by the friction is transferred to the position of the second airbag to heat the gas in the second airbag. Then, under the extrusion of the pressing plate on the second airbag, the hot air in the second airbag is sprayed out through the nozzle to dry the sludge in the sedimentation tank. Then, during the continuous friction between the second slider and the friction strip, the heat is transferred to the first airbag, and the first airbag expands due to heat. Under the expansion effect, the scraper is driven to move downward and inserted into the sludge. And during the gradual expansion of the first airbag, the depth of the scraper inserted into the sludge becomes deeper and deeper, thus facilitating the full scraping and cleaning of the sludge in the sedimentation tank and improving the cleaning effect of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic sectional structural diagram of the present invention;

[0023] Figure 3 is a schematic plan structural diagram of the present invention;

[0024] Figure 4 is a schematic plan structural diagram of the rotary drum of the present invention;

[0025] Figure 5 is a schematic plan structural diagram of the second slider of the present invention;

[0026] Figure 6 is a schematic structural diagram of the scraper of the present invention.

[0027] In the figure: 1, sedimentation tank; 2, first slider; 3, first slide plate; 4, support block; 5, first support rod; 6, stirring rod; 7, rotating drum; 8, second support rod; 9, stirring shaft; 10, second slider; 11, second slide plate; 12, first airbag; 13, scraper; 14, pressing plate; 15, second airbag; 16, nozzle; 17, friction strip; 18, first rack; 19, first gear; 20, first sprocket; 21, second sprocket; 22, second rack; 23, second gear; 24, first bevel gear; 25, second bevel gear; 26, auxiliary rod; 27, auxiliary block; 28, fixed rod; 29, side plate; 30, scraper blade; 31, spring. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-6 , the present invention provides a technical solution for a nickel surface treatment wastewater treatment system and method:

[0030] Embodiment 1:

[0031] According to Figure 1 , Figure 3 and Figure 4As shown in the figure, it includes a sedimentation tank 1. First chutes are opened on both sides of the top of the sedimentation tank 1. First sliders 2 are slidably connected in the two first chutes. The two first sliders 2 are respectively slidably arranged on both sides of the bottom end of a first slide plate 3. Support blocks 4 are fixedly arranged on both sides of the top end of the first slide plate 3. A first support rod 5 is fixedly arranged on one side of one of the support blocks 4. A plurality of stirring rods 6 are fixedly arranged on both sides of the first support rod 5. The stirring rods 6 mix and stir the complexing agent breaker. A rotating cylinder 7 is rotatably connected to the outer wall of the first support rod 5. A liquid inlet is opened on one side of the rotating cylinder 7. A plurality of liquid outlets are opened on the outer wall of the rotating cylinder 7. When the first slide plate 3 moves, by using the second rack 22, the second gear 23, the first bevel gear 24 and the second bevel gear 25, the rotation of the rotating cylinder 7 is driven, and the complexing agent breaker is evenly sprayed into the wastewater in the sedimentation tank 1. Then, by using the first rack 18, the first gear 19, the first sprocket 20, the chain and the second sprocket 21, the rotation of the stirring shaft 9 is driven, and the complexing agent breaker and the wastewater are mixed and stirred, so that the complexing agent breaker is fully mixed, and the sedimentation effect of the wastewater is improved. A second support rod 8 is fixedly arranged on one side of the rotating cylinder 7. The second support rod 8 is rotatably arranged on one side of the other support block 4. A plurality of stirring shafts 9 are rotatably connected to the bottom end of the first slide plate 3. A plurality of stirring blades are symmetrically and fixedly arranged on both sides of the plurality of stirring shafts 9. A first rack 18 is fixedly arranged at the top of one side of the inner wall of the sedimentation tank 1. The first rack 18 is meshed with a first gear 19. The first gear 19 is rotatably arranged on one side of the bottom end of the first slide plate 3 through a first rotating shaft. A first sprocket 20 is fixedly sleeved on the outer wall of the first rotating shaft. The first sprocket 20 is connected to a plurality of second sprockets 21 through a chain drive. The plurality of second sprockets 21 are respectively fixedly sleeved on the outer walls of the plurality of stirring shafts 9. A second rack 22 is fixedly arranged at the top of the other side of the inner wall of the sedimentation tank 1. The second rack 22 is meshed with a second gear 23. The second gear 23 is rotatably arranged on the other side of the bottom end of the first slide plate 3 through a second rotating shaft. A first bevel gear 24 is fixedly arranged at the top end of the second rotating shaft. The first bevel gear 24 is meshed with a second bevel gear 25. The second bevel gear 25 is fixedly arranged at one end of the second support rod 8. Auxiliary rods 26 are fixedly arranged on one side of the two support blocks 4. Auxiliary blocks 27 are fixedly arranged at one end of the two auxiliary rods 26. The auxiliary rods 26 and the auxiliary blocks 27 are used to support the rotating cylinder 7 during rotation. The two auxiliary blocks 27 are respectively slidably arranged in two annular grooves. The two annular grooves are respectively opened on both sides of the rotating cylinder 7. Fixed rods 28 are fixedly arranged on one side of the first slide plate 3 and one side of the second slide plate 11. The fixed rods 28 and the fixed grooves are used to fix the first slide plate 3 and the second slide plate 11 respectively. The two fixed rods 28 are respectively engaged with fixed grooves. The two fixed grooves are respectively opened on one side of the inner wall of the sedimentation tank 1.

[0032] Embodiment 2:

[0033] On the basis of Embodiment 1, according to Figure 2 , Figure 5 andFigure 6 As shown, second chutes are respectively opened in the middle of both sides of the inner wall of the sedimentation tank 1. Second sliders 10 are slidably connected in both second chutes. The two second sliders 10 are respectively fixedly arranged on both sides of a second slide plate 11. A through groove is opened at the bottom end of the second slide plate 11. A first airbag 12 is fixedly arranged in the through groove. A scraping plate 13 is fixedly arranged at the bottom end of the first airbag 12. The scraping plate 13 is inserted into and connected with the through groove. Pressing plates 14 are respectively fixedly arranged at the bottom ends of the two second sliders 10. Second airbags 15 are respectively attached to the bottom ends of the two pressing plates 14. During the movement of the second sliders 10, the gas in the second airbags 15 is heated through the frictional action between the second sliders 10 and the friction strips 17. Meanwhile, under the extrusion of the pressing plates 14 on the second airbags 15, the hot air in the second airbags 15 is ejected through the nozzles 16 to dry the sludge in the sedimentation tank 1. Meanwhile, the first airbag 12 is heated through the frictional action between the second sliders 10 and the friction strips 17. The first airbag 12 expands due to heat and drives the scraping plate 13 to move downward. And during the gradual expansion of the first airbag 12, the depth of the scraping plate 13 inserted into the sludge becomes deeper and deeper, so as to facilitate the full scraping and cleaning of the sludge, improve the cleaning effect of the sludge. Finally, the sludge is discharged through the sludge outlet opened on one side of the sedimentation tank 1. The two second airbags 15 are respectively fixedly arranged in two grooves. The second airbags 15 are trapezoidal. The two grooves are respectively opened at the bottom ends of the inner walls of the two second chutes. Both second airbags 15 are fixedly communicated with exhaust pipes through connecting pipes. A plurality of nozzles 16 are respectively fixedly communicated with one side of the two exhaust pipes. The nozzles 16 are arranged obliquely downward, and the inclination angle is 45°. The plurality of nozzles 16 are respectively fixedly arranged on both sides of the inner wall of the sedimentation tank 1. Friction strips 17 are respectively arranged on one side of the two second sliders 10. The two friction strips 17 are respectively fixedly arranged on one side of the inner walls of the two second chutes. Side plates 29 are respectively hinged on both sides of the scraping plate 13. Scraping knives 30 are respectively fixedly arranged at one ends of the two side plates 29. The inner side wall of the sedimentation tank 1 is cleaned through the use of the side plates 29, the scraping knives 30 and the springs 31. Springs 31 are respectively fixedly arranged on one side of the two side plates 29. One ends of the two springs 31 are respectively fixedly arranged at both ends of one side of the scraping plate 13.

[0034] Embodiment 3:

[0035] On the basis of Embodiment 1 and Embodiment 2, according to Figures 1-6As shown, the rotary drum 7 and the stirring shaft 9 rotate synchronously, achieving the mixing and stirring of the complexing agent and the wastewater while uniformly spraying the complexing agent, making their mixture uniform. Then, it is left to stand in the sedimentation tank 1 for sedimentation. During the movement of the second slider 10, through the frictional contact with the friction strip 17, and then through the action of the pressing plate 14, the second airbag 15, the exhaust pipe, and the nozzle 16, hot steam is introduced into the sedimentation tank 1 to dry the sludge settled in the sedimentation tank 1. At the same time, during the continuous friction between the second slider 10 and the friction strip 17, the first airbag 12 expands, driving the scraper 13 to move downward to scrape and clean the sludge in the sedimentation tank 1. And as the first airbag 12 expands, the depth of the scraper 13 inserted into the sludge becomes deeper and deeper.

[0036] During specific use, for a nickel surface treatment wastewater treatment system and method of the present invention, first, the wastewater is introduced into the sedimentation tank 1, and then the complexing agent is added into the rotary drum 7. During the movement of the first slide plate 3, it drives the second rack 22 to mesh with the second gear 23, that is, drives the movement of the first bevel gear 24. The first bevel gear 24 drives the second bevel gear 25 to rotate, that is, drives the rotation of the rotary drum 7. The complexing agent is uniformly sprayed into the sedimentation tank 1 through the liquid outlet on the rotary drum 7. At the same time, under the meshing of the first rack 18 and the first gear 19, and then in cooperation with the use of the first sprocket 20 and the second sprocket 21, the stirring shaft 9 is driven to rotate. The complexing agent and the wastewater are mixed through the stirring shaft 9 and the stirring blades, making the mixture of the complexing agent and the wastewater uniform and improving the sedimentation effect of the wastewater. When the wastewater sedimentation is completed and the water is discharged, during the movement of the second slide plate 11, it drives the second slider 10 to be in frictional contact with the friction strip 17. Under the action of frictional heat generation, the heat is transferred to the second airbag 15 to heat the second airbag 15. At the same time, during the movement of the second slider 10, it drives the pressing plate 14 to squeeze the second airbag 15. Under the squeezing force, the hot air in the second airbag 15 can be ejected through the nozzle 16 to dry the sludge in the sedimentation tank 1. At the same time, during the continuous movement of the second slide plate 11 and the second slider 10, more and more heat is generated by the friction between the second slider 10 and the friction strip 17. After the heat is transferred to the first airbag 12, the first airbag 12 expands due to heat. Under the action of the expansion force, it drives the scraper 13 to move downward, inserting the scraper 13 into the sludge. And as the first airbag 12 continues to expand, the depth of the scraper 13 inserted into the sludge becomes deeper and deeper. Then, during the movement of the second slide plate 11, it drives the scraper 13 to clean the sludge in the sedimentation tank 1. During the movement of the scraper 13, it drives the side plate 29 and the scraper 30 to clean the inner side wall of the sedimentation tank 1, thereby improving the cleaning effect of the sludge.

[0037] In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, for example, it may be fixedly connected, may also be detachably connected, or integrated; it may be mechanically connected, may also be electrically connected; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nickel surface treatment wastewater treatment system, including a sedimentation tank (1), Characterized in that: On both sides of the top of the sedimentation tank (1), first sliding grooves are provided. Two first sliders (2) are slidably connected in the two first sliding grooves respectively. The two first sliders (2) are respectively slidably arranged on both sides of the bottom end of the first sliding plate (3). On both sides of the top end of the first sliding plate (3), support blocks (4) are fixedly provided. On one side of one of the support blocks (4), a first support rod (5) is fixedly provided. On both sides of the first support rod (5), a plurality of stirring rods (6) are fixedly provided. The outer wall of the first support rod (5) is rotatably connected with a rotating cylinder (7). A plurality of liquid outlets are provided on the outer wall of the rotating cylinder (7). On one side of the rotating cylinder (7), a second support rod (8) is fixedly provided. The second support rod (8) is rotatably arranged on one side of the other support block (4). The bottom end of the first sliding plate (3) is rotatably connected with a plurality of stirring shafts (9). On both sides of the plurality of stirring shafts (9), a plurality of stirring blades are symmetrically and fixedly provided; In the middle of both sides of the inner wall of the sedimentation tank (1), second sliding grooves are provided. Two second sliders (10) are slidably connected in the two second sliding grooves respectively. The two second sliders (10) are respectively fixedly arranged on both sides of the second sliding plate (11). A through groove is provided at the bottom end of the second sliding plate (11). A first airbag (12) is fixedly provided in the through groove. The bottom end of the first airbag (12) is fixedly provided with a scraping plate (13). The scraping plate (13) is inserted and connected with the through groove. At the bottom ends of the two second sliders (10), pressing plates (14) are fixedly provided. At the bottom ends of the two pressing plates (14), second airbags (15) are respectively attached. The two second airbags (15) are respectively fixedly arranged in two grooves. The two grooves are respectively provided at the bottom ends of the inner walls of the two second sliding grooves. The two second airbags (15) are both fixedly communicated with exhaust pipes through connecting pipes. On one side of the two exhaust pipes, a plurality of nozzles (16) are fixedly communicated. The plurality of nozzles (16) are respectively fixedly arranged on both sides of the inner wall of the sedimentation tank (1). On one side of the two second sliders (10), friction strips (17) are provided. The two friction strips (17) are respectively fixedly arranged on one side of the inner walls of the two second sliding grooves.

2. The nickel surface treatment wastewater treatment system according to claim 1, Characterized in that: On the top of one side of the inner wall of the sedimentation tank (1), a first rack (18) is fixedly provided. The first rack (18) is meshed with a first gear (19). The first gear (19) is rotatably arranged on one side of the bottom end of the first sliding plate (3) through a first rotating shaft.

3. The nickel surface treatment wastewater treatment system according to claim 2, Characterized in that: A first sprocket (20) is fixedly sleeved on the outer wall of the first rotating shaft. The first sprocket (20) is connected with a plurality of second sprockets (21) through a chain. The plurality of second sprockets (21) are respectively fixedly sleeved on the outer walls of the plurality of stirring shafts (9).

4. The nickel surface treatment wastewater treatment system according to claim 2, Characterized in that: On the top of the other side of the inner wall of the sedimentation tank (1), a second rack (22) is fixedly arranged, and the second rack (22) is meshed and connected with a second gear (23). The second gear (23) is rotatably arranged at the other side of the bottom end of the first slide plate (3) through a second rotating shaft.

5. A nickel surface treatment wastewater treatment system according to claim 4, characterized in that: At the top end of the second rotating shaft, a first bevel gear (24) is fixedly arranged. The first bevel gear (24) is meshed and connected with a second bevel gear (25), and the second bevel gear (25) is fixedly arranged at one end of the second support rod (8).

6. A nickel surface treatment wastewater treatment system according to claim 1, characterized in that: On one side of each of the two support blocks (4), an auxiliary rod (26) is fixedly arranged. At one end of each of the two auxiliary rods (26), an auxiliary block (27) is fixedly arranged. The two auxiliary blocks (27) are respectively slidably arranged in two annular grooves, and the two annular grooves are respectively opened on both sides of the rotating cylinder (7).

7. A nickel surface treatment wastewater treatment system according to claim 1, characterized in that: On one side of the first slide plate (3) and one side of the second slide plate (11), a fixing rod (28) is fixedly arranged. The two fixing rods (28) are both snap-connected with fixing grooves, and the two fixing grooves are respectively opened on one side of the inner wall of the sedimentation tank (1).

8. A nickel surface treatment wastewater treatment system according to claim 1, characterized in that: On both sides of the scraper (13), side plates (29) are hinged. At one end of each of the two side plates (29), a scraper blade (30) is fixedly arranged. On one side of each of the two side plates (29), a spring (31) is fixedly arranged. One end of each of the two springs (31) is respectively fixedly arranged at both ends of one side of the scraper (13).

9. A method for treating nickel surface treatment wastewater, characterized in that, using a nickel surface treatment wastewater treatment system according to any one of claims 1-8: The rotating cylinder (7) and the stirring shaft (9) rotate synchronously, so as to realize mixing and stirring of the complexing agent and the wastewater while uniformly spraying the complexing agent, making the mixture uniform, and then standing it in the sedimentation tank (1) for sedimentation and standing.

10. A method for treating nickel surface treatment wastewater according to claim 9, characterized in that: During the movement of the second slider (10), through frictional contact with the friction strip (17), and then through the action of the pressing plate (14), the second air bag (15), the exhaust pipe and the nozzle (16), hot steam is introduced into the sedimentation tank (1) to dry the sludge settled in the sedimentation tank (1). At the same time, during the continuous friction between the second slider (10) and the friction strip (17), the first air bag (12) expands, driving the scraper (13) to move downward to scrape and clean the sludge in the sedimentation tank (1), and as the first air bag (12) expands, the depth of the scraper (13) inserted into the sludge becomes deeper and deeper.

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