Process and method for recycling spent zinc-nickel electrolyte

Abstract

The application is suitable for the technical field of lithium copper foil, and provides a waste zinc-nickel liquid recycling process and method thereof, which comprises a zinc-nickel containing recycling water collecting pool, a lifting pump, an acid containing conditioning tank, a scale inhibitor conditioning tank, a valve, a filter, a conventional RO high-pressure pump, a concentrated water RO high-pressure pump and a concentrated water tank. The waste zinc-nickel liquid recycling process and method thereof can fully utilize zinc-nickel ions in the solution, improve the utilization rate of zinc-nickel ions in the solution, avoid resource waste, contain zinc-nickel ions in the waste liquid, reduce the burden of waste liquid treatment after recycling, reduce the cost, and be more environmentally friendly. The recycling system of the waste zinc-nickel liquid is relatively stable in circulation, unnecessary liquid replacement process is reduced, labor cost is reduced, a good scale inhibitor conditioning tank is adopted to cooperate with the process, which is not possessed by other schemes, professional equipment is equipped with professional process.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery copper foil technology, and particularly relates to a process and method for recycling waste zinc-nickel liquid. Background Technology

[0002] With the rise of new energy vehicles, the demand for lithium-ion battery copper foil has further increased. However, the manufacturing process generates a large amount of waste liquid, making its treatment a critical issue to prevent a severe environmental burden. The production of lithium-ion battery copper foil mainly consists of three parts: copper dissolution, foil production, and slitting. The copper dissolution process lays a crucial foundation for the other two steps. First, copper wire coils are placed in a copper dissolution tank and diluted concentrated sulfuric acid is sprayed on them to dissolve the copper. The resulting copper sulfate solution provides an important raw material for copper foil production. Second, during copper foil production, copper ions in the electrolyte are deposited on a smooth, rotating stainless steel circular cathode roller. To prevent oxidation during handling and storage and to improve the adhesion of the copper foil, the stripped copper foil undergoes an anti-oxidation treatment before rewinding. Zinc, nickel, and other metals or alloys are plated onto the surface of the copper foil as an anti-oxidation coating, thereby extending the storage time of the copper foil and preventing resource waste. Finally, the foil is slitted to the corresponding size according to customer requirements, thus completing the copper foil manufacturing process.

[0003] To improve the oxidation resistance of copper foil, additives are injected into the pipeline before the foil-making machine feeds in the liquid. This can enhance the tensile properties and oxidation resistance of the copper foil to some extent. While the performance and oxidation resistance of copper foil can be improved through processing, the composition of the waste liquid becomes more complex. Therefore, waste liquid treatment is a pressing issue. The treatment process is complex and costly, and the zinc and nickel ions in the solution cannot be reused, resulting in resource waste. Summary of the Invention

[0004] This invention provides a process and method for recycling waste zinc-nickel liquid, aiming to solve the technical problems of complex composition, complicated processing procedures, high cost, and the inability to reuse zinc and nickel ions in the solution, resulting in resource waste.

[0005] This invention is implemented as follows: a waste zinc-nickel liquid recycling process includes: a zinc-nickel recycled water collection tank, a booster pump, an acid-containing conditioning tank, a scale inhibitor conditioning tank, valves, a filter, a conventional RO high-pressure pump, a concentrated water RO high-pressure pump, and a concentrated water tank; the zinc-nickel recycled water collection tank is connected to the waste liquid return pipe in the anti-oxidation tank of the foil-making machine; the booster pump, the acid-containing conditioning tank, and the scale inhibitor conditioning tank are connected between the zinc-nickel recycled water collection tank and the valves; the filter and the conventional RO high-pressure pump are connected in sequence between the valves and the RO concentrated water tank; and the concentrated water RO high-pressure pump is connected between the zinc-nickel recycled water collection tank and the RO concentrated water tank.

[0006] Preferably, the scale inhibitor preparation tank includes a mixing tank, a housing is fixedly installed on the top of the mixing tank, a motor is fixedly installed inside the housing, a drive shaft is rotatably installed inside the mixing tank, the top end of the drive shaft is fixedly connected to the output shaft of the motor, and blades are fixedly installed on the drive shaft.

[0007] Preferably, a stabilizing frame rotatably connected to the drive shaft is fixedly installed inside the mixing tank, and a scraper is fixedly installed at the bottom end of the drive shaft, with the scraper in contact with the bottom inner wall of the mixing tank.

[0008] Preferably, a cover is hinged to the top inlet of the mixing tank, a drain pipe is fixedly connected to the bottom of the mixing tank, and a main feed pipe is provided on either side of the mixing tank.

[0009] Preferably, a temporary storage tank is fixedly installed on one side of the mixing tank, and a suction pipe is fixedly connected to the bottom of the temporary storage tank and the drain pipe. A drain valve is provided on the drain pipe below the suction pipe, and a suction valve is provided on the suction pipe.

[0010] Preferably, the temporary storage tank is provided with a piston mechanism, the piston mechanism including a threaded cylinder rotatably mounted on the top of the temporary storage tank, a lifting screw being threadedly installed inside the threaded cylinder, and a piston plate conformally matched to the inner wall of the temporary storage tank being fixedly installed at the bottom end of the lifting screw, the piston plate and the inner wall of the temporary storage tank being rectangular.

[0011] Preferably, the top of the temporary storage tank is provided with an air hole, and a second housing is fixedly installed on the top of the temporary storage tank. The second housing is offset from the air hole. The top of the second housing is provided with a through hole through which the lifting screw can slide. A motor is fixedly installed inside the second housing. Both the output shaft and the threaded cylinder of the motor are fixedly fitted with bevel gears, and the two bevel gears mesh with each other.

[0012] Preferably, a guide rail located outside the threaded cylinder is fixedly installed on the top of the temporary storage tank, and a support arm that is slidably connected to the guide rail is fixedly installed on the threaded cylinder.

[0013] Preferably, a storage hopper is rotatably sleeved on the drive shaft and fixedly connected to the inner wall of the top of the mixing tank. The storage hopper is correspondingly arranged with the cover. The bottom of the storage hopper includes a horizontal part located in the center and a downwardly sloping folded edge part located around the periphery. A scraper blade for conformally matching the bottom of the storage hopper is fixedly installed on the drive shaft. Multiple small particle discharge pipes are evenly arranged around the storage hopper. The mixing tank, the storage hopper and the multiple small particle discharge pipes are provided with a discharge mechanism. The mixing tank is provided with a cleaning mechanism.

[0014] This invention also includes a method for using a waste zinc-nickel liquid recycling process, characterized by the following steps:

[0015] a. The waste liquid in the anti-oxidation tank of the foil making machine is returned to the zinc-nickel recycled water collection tank of the waste zinc-nickel liquid recycling system;

[0016] b. Then, additives are added to the system conditioning tank for conditioning and filtration. The conditioning tank includes an acid conditioning tank and a scale inhibitor conditioning tank. The solution is then lifted by a booster pump and sent to the zinc-nickel wastewater collection tank. The solution in the zinc-nickel wastewater collection tank is then conditioned through a series of processes and sent to the additive preparation tank. After reaction filtration, the pretreated water is given higher pressure by a conventional RO high-pressure pump so that it can pass through the RO membrane of the filter, thereby separating pure water from concentrated water.

[0017] c. The entire waste zinc-nickel liquid recycling system is a circular system that continuously processes and separates the waste liquid, thereby achieving a closed-loop reuse effect.

[0018] d. When the scale inhibitor is being prepared in the preparation tank, if large solid materials, such as those with a particle size larger than the small particle discharge pipe, cannot pass through, they enter through the main feed pipe. The solution can be pumped into the mixing tank through the main feed pipe using an external pump. If small particles or powder can pass through the small particle discharge pipe, the material is introduced into the storage hopper through the sealed feed port. During preparation, the discharge mechanism and motor are started. When the motor starts, it drives the drive shaft to rotate. When the drive shaft rotates, it drives the blades and scraper to rotate, which can stir the material. At the same time, the drive shaft drives the scraper to rotate. When the scraper rotates, it scrapes the small particles of material to rotate in the storage hopper, so that the material is discharged through the small particle discharge pipe. The uniform discharge of the material can better mix with the solution and improve the mixing effect of the material. After mixing, the material can be discharged by opening the drain valve on the drain pipe.

[0019] e. After each mixing, the mixing tank needs to be cleaned. During cleaning, the solution is pumped in through the cleaning mechanism. The rinsed solution accumulates at the bottom of the mixing tank. At this time, the suction valve on the suction pipe is opened and the motor is started. The output shaft of the motor drives two meshing bevel gears to rotate, causing the threaded cylinder to rotate. When the threaded cylinder rotates, it drives the support arm to rotate along the guide rail, improving the load-bearing capacity. The threaded cylinder drives the lifting screw to slide under the limit of the piston plate and the rectangular structure of the temporary storage tank, causing the lifting screw to drive the piston plate to slide. The air above the piston plate flows through the air hole, and the suction pipe below sucks up the rinsed solution, so that the solution is temporarily stored in the temporary storage tank. After the storage is completed, the suction valve is closed. The solution can be reused when mixing the same components in the next mixing, reducing waste.

[0020] f. The cleaning mechanism can not only be used to rinse the inner cavity of the mixing tank, but also to feed small particles together to improve the mixing effect. The rotating scraper can scrape off the solution at the bottom of the mixing tank, making the drainage cleaner.

[0021] Compared with related technologies, the drug pulverizing device provided by the present invention has the following beneficial effects:

[0022] Compared with existing technologies, the waste zinc-nickel liquid recycling process and method provided in this solution can make full use of zinc and nickel ions in the solution, improve the utilization rate of zinc and nickel ions in the solution, and avoid resource waste. The waste liquid contains zinc and nickel ions, which are heavy metals. After recycling, the burden of waste liquid treatment can be reduced, the cost can be lowered, and it is also more environmentally friendly. The waste zinc-nickel liquid recycling system has a relatively stable cycle, reducing unnecessary liquid replacement processes, thereby reducing labor costs. Attached Figure Description

[0023] Figure 1 Flowchart of the waste zinc-nickel liquid recycling system provided by the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the scale inhibitor preparation tank in this invention;

[0025] Figure 3 This is a schematic diagram of the main structure of the scale inhibitor preparation tank in this invention;

[0026] Figure 4 This is a schematic diagram of the main cross-sectional view of the scale inhibitor preparation tank in this invention;

[0027] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle;

[0028] Figure 6 for Figure 4 A magnified structural diagram of part B in the middle section;

[0029] Figure 7 for Figure 4 A magnified structural diagram of section C;

[0030] Figure 8 for Figure 4 A magnified structural diagram of section D;

[0031] Figure 9 for Figure 8 A magnified structural diagram of section E in the middle;

[0032] Figure 10 This is a rear view schematic diagram of the scale inhibitor preparation tank in this invention;

[0033] Figure 11 This is a three-dimensional structural diagram of the storage hopper in this invention;

[0034] Figure 12 This is a schematic diagram of the three-dimensional assembly structure of the threaded cylinder, guide rail, and support arm in this invention.

[0035] Attached reference numerals: 1. Zinc-nickel recycled water collection tank; 2. Lift pump; 3. Acid-containing conditioning tank; 4. Scale inhibitor conditioning tank; 5. Valve; 6. Filter; 7. Conventional RO high-pressure pump; 8. Concentrate RO high-pressure pump; 9. RO concentrate tank; 10. Temporary storage tank; 11. Suction pipe; 12. Drain valve; 13. Suction valve; 14. Threaded cylinder; 15. Lifting screw; 16. Piston plate; 17. Vent; 18. Shell II; 19. Motor; 20. Bevel gear; 21. Guide rail; 2 2. Support arm; 23. Water distribution ring pipe; 24. High-pressure nozzle; 25. External water pipe; 26. Storage hopper; 27. Small particle discharge pipe; 28. Flow guide connector; 29. ​​Air distribution ring pipe; 30. Connecting pipe; 31. Fan; 32. External air pipe; 33. Scraper blade; 34. Main feed pipe; 35. Assembly frame; 36. Mixing tank; 37. Shell 1; 38. Motor; 39. Drive shaft; 40. Blade; 41. Stabilizer; 42. Scraper blade; 43. Cover; 44. Drain pipe. Detailed Implementation

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] This invention provides a process for recycling waste zinc-nickel liquid, such as... Figure 1-12As shown, the waste zinc-nickel liquid recycling process and method include: a zinc-nickel recycled water collection tank 1, a booster pump 2, an acid-containing conditioning tank 3, a scale inhibitor conditioning tank 4, a valve 5, a filter 6, a conventional RO high-pressure pump 7, a concentrated water RO high-pressure pump 8, and a concentrated water tank 9; the zinc-nickel recycled water collection tank 1 is connected to the waste liquid return pipe in the anti-oxidation tank on the foil production machine; the booster pump 2, the acid-containing conditioning tank 3, and the scale inhibitor conditioning tank 4 are connected between the zinc-nickel recycled water collection tank 1 and the valve 5; the filter 6 and the conventional RO high-pressure pump 7 are connected in sequence between the valve 5 and the RO concentrated water tank 9; and the concentrated water RO high-pressure pump 8 is connected between the zinc-nickel recycled water collection tank 1 and the RO concentrated water tank 9.

[0039] In this embodiment, the waste zinc-nickel liquid recycling process can make full use of the zinc-nickel ions in the solution, improve the utilization rate of zinc-nickel ions in the solution, and avoid resource waste. The waste liquid contains zinc-nickel ions, which are heavy metals. After recycling, the burden of waste liquid treatment can be reduced, the cost can be lowered, and it is also more environmentally friendly. The waste zinc-nickel liquid recycling system has a relatively stable cycle, reducing unnecessary liquid replacement processes, thereby reducing labor costs.

[0040] In a further preferred embodiment of the present invention, the scale inhibitor preparation tank 4 includes a mixing tank 36, a housing 37 is fixedly installed on the top of the mixing tank 36, a motor 38 is fixedly installed inside the housing 37, a drive shaft 39 is rotatably installed inside the mixing tank 36, the top end of the drive shaft 39 is fixedly connected to the output shaft of the motor 38, and blades 40 are fixedly installed on the drive shaft 39.

[0041] In this embodiment, when the scale inhibitor is being prepared, the motor 38 is started normally. The output shaft of the motor 38 drives the transmission shaft 39 and the blades 40 to rotate, so that the scale inhibitor in the mixing tank 36 is mixed.

[0042] In a further preferred embodiment of the present invention, a stabilizer 41 rotatably connected to a drive shaft 39 is fixedly installed inside the mixing tank 36, and a scraper 42 is fixedly installed at the bottom end of the drive shaft 39, the scraper 42 being in contact with the bottom inner wall of the mixing tank 36.

[0043] In this embodiment, since the drive shaft 39 is relatively long, the use of the stabilizer 41 can ensure that the long drive shaft 39 is relatively stable during use. The scraper 42 can stir the material at the bottom of the mixing tank 36 and scrape it off when discharged, reducing the problem of residual material.

[0044] In a further preferred embodiment of the present invention, a cover 43 is hingedly installed at the top inlet of the mixing tank 36, a drain pipe 44 is fixedly connected to the bottom of the mixing tank 36, and a main feed pipe 34 is provided on either side of the mixing tank 36.

[0045] In this embodiment, the cover 43 covers the feed inlet, the drain pipe 44 can discharge the material, and the main feed pipe 34 can introduce the material into the mixing tank 36.

[0046] In a further preferred embodiment of the present invention, a temporary storage tank 10 is fixedly installed on one side of the mixing tank 36, and a suction pipe 11 is fixedly connected to the bottom of the temporary storage tank 10 and the drain pipe 44. A drain valve 12 located below the suction pipe 11 is provided on the drain pipe 44, and a suction valve 13 is provided on the suction pipe 11.

[0047] In this embodiment, the temporary storage tank 10 provided on one side of the mixing tank 36 uses a suction pipe 11 to temporarily store the cleaned solution for reuse in the next use. The drain valve 12 and the suction valve 13 can control the opening and closing of each pipe respectively.

[0048] In a further preferred embodiment of the present invention, the temporary storage tank 10 is provided with a piston mechanism, the piston mechanism including a threaded cylinder 14 rotatably mounted on the top of the temporary storage tank 10, a lifting screw 15 is threadedly installed on the threaded cylinder 14, and a piston plate 16 conformally matched with the inner wall of the temporary storage tank is fixedly installed at the bottom end of the lifting screw 15. Both the piston plate 16 and the inner wall of the temporary storage tank 10 are rectangular.

[0049] In this embodiment, when the solution is temporarily stored in the temporary storage tank 10, the suction force is generated by the piston mechanism. When the piston mechanism is running, the threaded cylinder 14 rotates, and the threaded cylinder 14 drives the lifting screw 15 to rise and fall, causing the piston plate 16 to slide and generate suction or thrust, thereby realizing the absorption and discharge of the solution.

[0050] In a further preferred embodiment of the present invention, the top of the temporary storage tank 10 is provided with an air hole 17, and a housing 2 18 is fixedly installed on the top of the temporary storage tank 10. The housing 2 18 is offset from the air hole 17. The top of the housing 2 18 is provided with a through hole through which the lifting screw 15 can slide. A motor 19 is fixedly installed inside the housing 2 18. Both the output shaft of the motor 19 and the threaded cylinder 14 are fixedly fitted with bevel gears 20, and the two bevel gears 20 mesh with each other.

[0051] In this embodiment, the air hole 17 ensures the air pressure balance of the piston plate 16 during sliding. During use, the motor 19 is powered on, and the output shaft of the motor 19 drives the threaded cylinder 14 to rotate using a bevel gear 20. The lifting screw 15 can slide freely along the housing 18 to achieve lifting and lowering.

[0052] In a further preferred embodiment of the present invention, a guide rail 21 located outside the threaded cylinder 14 is fixedly installed on the top of the temporary storage tank 10, and a support arm 22 slidably connected to the guide rail 21 is fixedly installed on the threaded cylinder 14.

[0053] In this embodiment, when the threaded cylinder 14 is in operation, due to the large pressure, the support arm 22 slides along the guide rail 21, which can improve the support force and ensure stability while rotating.

[0054] In a further preferred embodiment of the present invention, a storage hopper 26 fixedly connected to the top inner wall of the mixing tank 36 is rotatably sleeved on the drive shaft 39. The storage hopper 26 is correspondingly arranged with the cover 43. The bottom of the storage hopper 26 includes a horizontal part located in the center and a downwardly inclined folded edge part located around the periphery. A scraper 33 for conformally matching the bottom of the storage hopper 26 is fixedly installed on the drive shaft 39. A plurality of small particle discharge pipes 27 are evenly arranged around the storage hopper 26. The mixing tank 36, the storage hopper 26 and the plurality of small particle discharge pipes 27 are provided with a discharge mechanism. The mixing tank 36 is provided with a cleaning mechanism.

[0055] In this embodiment, the small particles are scraped by the rotating scraper 33 in the storage hopper 26 to ensure material flow and smooth discharge through the small particle discharge pipe 27.

[0056] In a further embodiment, the discharge mechanism includes a flow guide 28 fixedly connected to the small particle discharge pipe 27 and inclinedly arranged. The storage hopper 26 is fixedly sleeved with an air distribution ring pipe 29. The air distribution ring pipe 29 and the flow guide 28 are connected by a connecting pipe 30. A fan 31 is provided on one side of the mixing tank 36. The air outlet of the fan 31 is connected to the air distribution ring pipe 29 by an external air pipe 32.

[0057] In actual operation, the blower 31 supplies air to the external air pipe 32 and the air distribution ring pipe 29. The air is introduced into the small particle discharge pipe 27 through the connecting pipe 30 and the inclined guide joint 28. The discharged air makes the material easier to be discharged through the small particle discharge pipe 27 through the Venturi effect.

[0058] The cleaning mechanism includes a water distribution ring pipe 23 fixedly installed on the inner wall of the mixing tank 36 and located outside the storage hopper 26. The outer ring of the water distribution ring pipe 23 is provided with multiple high-pressure nozzles 24 that spray liquid onto the inner wall of the mixing tank 36. The water distribution ring pipe 23 is provided with an external water pipe 25 extending to the outside of the mixing tank 36 for supplying solution.

[0059] During use, the external water pipe 25 is connected to an external solution. The solution is pumped in through the pump body and then sprayed out through the water distribution ring pipe 23 and the high-pressure nozzle 24, which can clean the inner wall of the mixing tank 36 and mix with the discharged material.

[0060] The bottom of the mixing tank 36 is provided with an assembly rack 35 for installation.

[0061] This invention also includes a method for using a waste zinc-nickel liquid recycling process, characterized by the following steps:

[0062] a. The waste liquid in the anti-oxidation tank of the foil making machine is returned to the zinc-nickel recycled water collection tank 1 of the waste zinc-nickel liquid recycling system;

[0063] b. Then, additives are added to the system conditioning tank for conditioning and filtration. The conditioning tank includes an acid conditioning tank 3 and a scale inhibitor conditioning tank 4. The solution is then lifted by a booster pump 2 and sent to a zinc-nickel wastewater collection tank 1. The solution in the zinc-nickel wastewater collection tank 1 is conditioned through a series of processes and then sent to an additive preparation tank. After reaction filtration, the pretreated water is given higher pressure by a conventional RO high-pressure pump 7 so that it can pass through the RO membrane of the filter 6, thereby separating pure water from concentrated water.

[0064] c. The entire waste zinc-nickel liquid recycling system is a circular system that continuously processes and separates the waste liquid, thereby achieving a closed-loop reuse effect.

[0065] d. When the scale inhibitor is being prepared in the preparation tank 4, if large solid materials with a particle size larger than that of the small particle discharge pipe 27 cannot pass through, they enter through the main feed pipe 34. The solution can be pumped into the mixing tank 36 through the main feed pipe 34 by an external pump. When small particles or powder can pass through the small particle discharge pipe 27, the material is introduced into the storage hopper 26 through the feed port of the cover 43. During preparation, the discharge mechanism and motor 38 are started. When the motor 38 is started, it drives the drive shaft 39 to rotate. When the drive shaft 39 rotates, it drives the blades 40 and the scraper 42 to rotate, which can stir the material. At the same time, the drive shaft 39 drives the scraper 33 to rotate. When the scraper 33 rotates, it scrapes the small particles of material to rotate in the storage hopper 26, so that the material is discharged through the small particle discharge pipe 27. The uniform discharge of the material can better mix with the solution and improve the mixing effect of the material. After mixing, the material can be discharged by opening the drain valve 12 on the drain pipe 44.

[0066] e. After each mixing, the mixing tank 36 needs to be cleaned. During cleaning, the solution is pumped in through the cleaning mechanism. The rinsed solution accumulates at the bottom of the mixing tank 36. At this time, the suction valve 13 on the suction pipe 11 is opened, and the motor 19 is started. The output shaft of the motor 19 drives two meshing bevel gears 20 to rotate, causing the threaded cylinder 14 to rotate. When the threaded cylinder 14 rotates, it drives the support arm 22 to rotate along the guide rail 21, improving the load-bearing capacity. The threaded cylinder 14 drives the lifting screw 15 to slide under the limit of the rectangular structure of the piston plate 16 and the temporary storage tank 10, so that the lifting screw 15 drives the piston plate 16 to slide. The air above the piston plate 16 flows through the air hole 17, and the suction pipe 11 below sucks up the rinsed solution, so that the solution is temporarily stored in the temporary storage tank 10. After the storage is completed, the suction valve 13 is closed. The solution can be reused when mixing the same components in the next mixing, reducing waste.

[0067] f. The cleaning mechanism can not only be used to rinse the inner cavity of the mixing tank 36, but also to feed small particles together to make the mixing effect better. The rotating scraper 42 can scrape off the solution at the bottom of the mixing tank 36 to make the drainage cleaner.

[0068] Compared with related technologies, this waste zinc-nickel liquid recycling process can make full use of the zinc and nickel ions in the solution, improve the utilization rate of zinc and nickel ions in the solution, and avoid resource waste. The waste liquid contains zinc and nickel ions, which are heavy metals. After recycling, the burden of waste liquid treatment can be reduced, the cost can be lowered, and it is also more environmentally friendly. The waste zinc-nickel liquid recycling system has a relatively stable cycle, reducing unnecessary liquid replacement processes, thereby reducing labor costs.

[0069] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A process for recycling spent zinc-nickel electrolyte, characterized in that, Include: Zinc nickel containing recycling pool, booster pump, acid containing conditioning tank, scale inhibitor conditioning tank, valve, filter, conventional RO high pressure pump, concentrated water RO high pressure pump and concentrated water tank; The zinc nickel containing recycling pool is connected at the waste liquid return pipe in the anti-oxidation tank of the foil making machine, the zinc nickel containing recycling pool is communicated with the booster pump, the acid containing conditioning tank and the scale inhibitor conditioning tank between the valve, the filter and the conventional RO high pressure pump are sequentially communicated between the valve and the RO concentrated water tank, the zinc nickel containing recycling pool is communicated with the concentrated water RO high pressure pump between the RO concentrated water tank;The scale inhibitor conditioning tank comprises a mixing tank, a shell one is fixedly installed on the top of the mixing tank, a motor is fixedly installed in the shell one, a transmission shaft is rotatably installed in the mixing tank, the top end of the transmission shaft is fixedly connected with the output shaft of the motor, and a blade is fixedly installed on the transmission shaft;The cover is hingedly installed at the top feed port of the mixing tank, the bottom of the mixing tank is fixedly communicated with the liquid discharge pipe, and the total feed pipe is arranged on any side of the mixing tank;The transmission shaft is rotatably sleeved with a storage hopper fixedly connected with the inner wall of the top of the mixing tank, the storage hopper is correspondingly arranged with the cover, the bottom of the storage hopper comprises a horizontal part located in the center and a downwardly inclined folded edge part located at the periphery, a scraping piece for conformal matching with the bottom of the storage hopper is fixedly installed on the transmission shaft, a plurality of small particle discharge pipes are uniformly arranged around the storage hopper, and a discharge mechanism is arranged on the mixing tank, the storage hopper and the plurality of small particle discharge pipes;The cleaning mechanism is arranged on the mixing tank.

2. The process for recycling spent zinc-nickel electrolyte according to claim 1, characterized in that, The mixing tank is fixedly installed with a stabilizing frame rotatably connected with the transmission shaft, and a liquid scraping piece is fixedly installed at the bottom end of the transmission shaft.

3. The process for recycling spent zinc-nickel electrolyte according to claim 2, characterized in that, One side of the mixing tank is fixedly installed with a temporary storage tank, the bottom of the temporary storage tank is fixedly communicated with the liquid suction pipe, the liquid discharge valve is arranged below the liquid suction pipe on the liquid discharge pipe, and the liquid suction valve is arranged on the liquid suction pipe.

4. The process for recycling spent zinc-nickel electrolyte according to claim 3, characterized in that, The piston mechanism is arranged on the temporary storage tank, the piston mechanism comprises a threaded cylinder rotatably installed on the top of the temporary storage tank, a lifting screw is threadedly installed in the threaded cylinder, a piston piece conformally matched with the inner wall of the temporary storage tank is fixedly installed at the bottom end of the lifting screw, and the piston piece and the inner wall of the temporary storage tank are both rectangular.

5. The process for recycling spent zinc-nickel electrolyte according to claim 4, characterized in that, A gas hole is formed in the top of the temporary storage tank, a shell two is fixedly installed on the top of the temporary storage tank, the shell two is arranged staggered with the gas hole, a through hole is formed in the top of the shell two, the through hole is slidably penetrated by the lifting screw, a motor is fixedly installed in the shell two, a bevel gear is fixedly sleeved on the output shaft of the motor and the threaded cylinder, and the two bevel gears are meshed.

6. The process for recycling spent zinc-nickel electrolyte according to claim 4, characterized in that, A guide rail is fixedly installed on the threaded cylinder outside the threaded cylinder, and a support arm is fixedly installed on the threaded cylinder in sliding connection with the guide rail.

7. The method of using the process for recycling spent zinc-nickel electrolyte according to any one of claims 1-6, characterized in that, The following steps: a, the waste liquid in the anti-oxidation tank of the foil making machine returns to the zinc nickel containing recycling pool of the waste zinc nickel liquid recycling system; b、After adding additives to the system modulation tank for modulation and filtration, the modulation tank includes acid-containing modulation tank and scale inhibitor modulation tank, and then through the lifting pump to send to the zinc-containing nickel reuse pool, the solution in the zinc-containing nickel waste liquid pool is sent to the additive preparation tank after a series of processes, and after filtration, the pretreated water is provided with higher pressure by the conventional RO high-pressure pump to pass through the RO membrane of the filter, so as to separate pure water and concentrated water; c、The whole waste zinc-nickel liquid recycling system is a circulating system, which continuously processes and separates the waste liquid, thereby achieving a closed loop recycling effect; d、Among them, When large solid materials such as particle size greater than small particle discharge pipe cannot pass through the scale inhibitor modulation tank for modulation, they enter through the total feed pipe, and the solution can be pumped into the mixing tank through the total feed pipe. When small particle size or powder can pass through the small particle discharge pipe, the material is introduced into the storage hopper through the feed port of the cover. When the discharge mechanism and the motor are started during the modulation, the motor drives the transmission shaft to rotate when it is started. The transmission shaft drives the blade and the liquid scraping piece to rotate when it rotates, which can stir the material. At the same time, the transmission shaft drives the scraping piece to rotate, and the scraping piece rotates to rotate the small particle material in the storage hopper, so that the material is discharged through the small particle discharge pipe. Uniformly discharged material can better mix with the solution, improve the mixing effect of the material, and the mixed material can be discharged by opening the liquid discharge valve of the liquid discharge pipe; e、After each preparation is completed, the mixing tank needs to be cleaned. When cleaning, the solution is pumped in through the cleaning mechanism. The washed solution is accumulated at the bottom of the mixing tank. At this time, the liquid suction valve on the liquid suction pipe is opened, the motor is started, the output shaft of the motor drives the two meshing bevel gears to rotate, the threaded cylinder rotates, the threaded cylinder drives the support arm to rotate along the guide rail when rotating, improves the bearing capacity, and the threaded cylinder drives the lifting screw to slide under the limit of the piston piece and the temporary storage tank rectangular structure, so that the lifting screw drives the piston piece to slide. The air above the piston piece flows through the air hole, and the washed solution is sucked by the liquid suction pipe below, so that the solution is temporarily stored in the temporary storage tank. After the liquid storage is completed, the liquid suction valve is closed. The same components can be used again during the next mixing, reducing waste; f、The cleaning mechanism can not only be used to flush the inner cavity of the mixing tank, but also can be used with small particle materials to improve the mixing effect. The rotating liquid scraping piece can scrape the solution at the bottom of the mixing tank, making the liquid discharge cleaner.

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