Integrated system for resource recycling and wastewater treatment of silver / nickel electroplating waste liquid

Abstract

The application discloses a silver / nickel electroplating waste liquid resource recovery and wastewater treatment integrated system, which comprises support frame one and support frame two, the support frame one is fixedly connected with a treatment barrel one for collecting and homogenously treating rinsing wastewater, and the support frame two is fixedly connected with a treatment barrel two for breaking and oxidizing the wastewater. In the application, the waste liquid homogenization and the mixing of the reagent can be completed by relying on the liquid inflow flow impact force through the built-in unpowered stirring structure of the treatment barrel one and the treatment barrel two, the additional stirring motor configuration is omitted, the equipment operation energy consumption and mechanical failure points are reduced, the slant bottom design and the switchable filtering structure are matched, the continuously fluctuating drainage working conditions of the rinsing wastewater can be adapted, the water quality and quantity are stabilized, reliable water inflow conditions are provided for the subsequent metal adsorption recovery process, and the influence of the water quality fluctuation on the recovery efficiency is reduced.

Description

Technical Field

[0001] This invention relates to the field of electroplating equipment technology, specifically to an integrated system for the resource recovery and wastewater treatment of silver / nickel electroplating waste liquid. Background Technology

[0002] Silver / nickel electroplating wastewater refers to heavy metal-containing wastewater generated during silver plating, nickel plating, and silver-nickel alloy processing in the electroplating industry. It includes categories such as discarded concentrated plating solutions, stripping residues, and process cleaning wastewater. The silver and nickel contained in the wastewater are both high-value non-ferrous metal resources. At the same time, this type of wastewater belongs to the category of hazardous waste and must be properly treated to meet standards before it can be discharged. Multi-stage rinsing wastewater from silver-nickel plated parts is the continuous drainage generated after the parts are removed from the plating tank and undergo multi-stage countercurrent rinsing. It is the main component of electroplating wastewater. Although its metal concentration is low, its water volume is high. It carries trace amounts of complexing agents and electroplating additives, and has both resource recovery value and water pollution control needs. It is the core treatment object for water conservation and resource recycling in the electroplating industry.

[0003] Existing wastewater treatment devices for silver-nickel electroplating rinsing mostly use electric stirring mechanisms to homogenize water and mix chemicals. This requires additional drive motors and transmission components, resulting in relatively high energy consumption and equipment maintenance costs. Furthermore, the mechanical transmission components are prone to wear and tear due to prolonged contact with corrosive wastewater. In addition, conventional filtration units are mostly fixed single-channel structures, requiring shutdown and disassembly for replacement when the filter media becomes clogged. This makes it difficult to adapt to the continuous fluctuations in the volume and quality of rinsing wastewater, which can easily cause fluctuations in the influent load and consequently affect the operational stability and treatment efficiency of subsequent metal adsorption and recovery processes. Summary of the Invention

[0004] The purpose of this invention is to address the problems of existing silver / nickel electroplating rinsing wastewater treatment devices, which mostly use electric stirring mechanisms to homogenize water and mix chemicals. These devices require additional drive motors and matching transmission components, resulting in relatively high energy consumption and equipment maintenance costs. Furthermore, the mechanical transmission components are prone to wear and tear due to long-term contact with corrosive wastewater. In addition, conventional filtration units are mostly fixed single-channel structures, requiring shutdown and disassembly for replacement after filter media blockage. This makes it difficult to adapt to the continuous fluctuations in the volume and quality of rinsing wastewater, easily causing fluctuations in the influent load, which in turn affects the operational stability and treatment efficiency of subsequent metal adsorption and recovery processes. The invention provides an integrated system for the resource recovery and wastewater treatment of silver / nickel electroplating wastewater.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid, comprising: a support frame one and a support frame two, wherein a treatment tank one for collecting and homogenizing rinsing wastewater is fixedly connected to the support frame one to stabilize the water concentration, and a treatment tank two for breaking down complexes and oxidizing the wastewater is fixedly connected to the support frame two. A liquid inlet pipe is connected through one top end of the first treatment tank, and a liquid outlet pipe is connected through one side end of the first treatment tank; a rotating shaft is rotatably arranged along the height direction at the center of the first treatment tank, the upper and lower ends of the rotating shaft respectively penetrate through the upper and lower ends of the first treatment tank, an agitating rod is fixedly connected to the outer circular surface of the rotating shaft, a driving fan blade is fixedly connected to the outer circular surface of the rotating shaft, and the driving fan blade is arranged inside the first treatment tank and located above the agitating rod; A filter member is arranged on the liquid outlet pipe on the first treatment tank; The filter member comprises an installation box in through connection with the liquid outlet pipe on the first treatment tank, an installation plate is fixedly connected to the side end of the installation box, a switching block is inserted into the installation box, the switching block penetrates through the upper and lower ends of the installation box, a hydraulic rod is fixedly connected to the bottom end of the installation plate, the movable end of the hydraulic rod penetrates through the installation plate and is fixedly connected with the switching block, a flow hole is opened through the switching block along the axial direction of the liquid outlet pipe, and a filter plate is fixedly connected to the side of the flow hole away from the first treatment tank.

[0006] As a further aspect of the present invention: the liquid outlet pipe is arranged on the side of the first treatment tank away from the liquid inlet pipe and close to the inner bottom end of the first treatment tank, the bottom end of the first treatment tank is an inclined surface, and the side close to the liquid outlet pipe is the lowest end.

[0007] As a further aspect of the present invention: the rotating shaft is I-shaped, the agitating rods are provided with multiple groups, which are spirally and evenly distributed on the outer circular surface of the rotating shaft, multiple groups of agitating rods are arranged inside the first treatment tank, five groups of driving fan blades are evenly distributed on the outer circular surface of the rotating shaft, the driving fan blades are spiral, and the through opening of the liquid inlet pipe and the first treatment tank is located above the driving fan blades.

[0008] As a further aspect of the present invention: the liquid outlet pipe and the installation box are distributed in a middle shape, two groups of installation plates are arranged, symmetrically distributed on both sides of the installation box and flush with the bottom of the installation box, and the switching block is T-shaped.

[0009] As a further aspect of the present invention: multiple groups of flow holes are provided, which are evenly distributed along the height direction of the installation box, a region without flow holes is reserved at a position below the switching block, this region is a blocking region, in an initial state, the blocking region is located in the installation box to block the liquid outlet pipe, so that liquid is stored in the first treatment tank.

[0010] As a further aspect of the present invention: the second treatment tank is also provided with a liquid inlet pipe, a liquid outlet pipe, a rotating shaft, an agitating rod and driving fan blades, the liquid outlet pipe at the upper end of the first treatment tank is communicated with the liquid inlet pipe on the second treatment tank, and a chemical feeding opening is opened through the top end of the second treatment tank.

[0011] As a further embodiment of the present invention: the drain pipe of the second treatment tank is provided with an adsorption element one and an adsorption element two, and the adsorption element one and the adsorption element two are provided in multiple sets in a straight line, distributed along the axis of the drain pipe.

[0012] As a further embodiment of the present invention: the first adsorption element and the second adsorption element also include a mounting box, a mounting plate, a switching block, a hydraulic rod and a flow hole. The flow hole in the first adsorption element is filled with a mercapto-SH functional special chelating resin, and the flow hole in the second adsorption element is filled with a nickel-specific cation exchange resin.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the built-in non-powered stirring structure of the first and second treatment tanks allows the waste liquid to be homogenized and the reagents mixed by relying on the impact force of the influent water flow. This eliminates the need for an additional stirring motor, reduces equipment operating energy consumption and mechanical failure points. Combined with the sloping bottom design and switchable filter structure, it can adapt to the continuously fluctuating drainage conditions of rinsing wastewater, stabilize the quality and quantity of influent water, provide reliable influent conditions for the subsequent metal adsorption and recovery process, and reduce the impact of water quality fluctuations on recovery efficiency. 2. The present invention utilizes a modular design that allows for the switching of filter elements and adsorption elements one and two, enabling filter plate rotation and adsorption resin desorption and regeneration without interrupting the wastewater treatment process. This eliminates the need for shutdown and pipeline disassembly, significantly reducing downtime for maintenance. The multi-station rotation mode is adaptable to electroplating production lines that operate continuously for hours, reducing the frequency of manual operation and on-site maintenance difficulty, and improving the overall operational stability of the system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the processing tank in this invention; Figure 3 This is a side sectional view of the processing tank in this invention; Figure 4 This is a schematic diagram of the filter element in this invention; Figure 5 This is a schematic diagram of the mounting box in this invention; Figure 6 This is a schematic diagram of the switching block in this invention; Figure 7 This is a schematic diagram of the structure of the second processing bucket in this invention.

[0015] In the diagram: 1. Support frame one; 4. Support frame two; 2. Treatment tank one; 21. Inlet pipe; 22. Drain pipe; 23. Rotating shaft; 24. Stirring rod; 25. Drive fan blade; 3. Filter element; 31. Mounting box; 32. Mounting plate; 33. Switching block; 34. Hydraulic rod; 35. Flow hole; 36. Filter plate; 5. Treatment tank two; 51. Dosing port; 6. Adsorption element one; 7. Adsorption element two. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0018] Reference Figure 1 In this embodiment of the invention, the integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid includes: a support frame 1 and a support frame 4. A treatment tank 2 for collecting and homogenizing rinsing wastewater is fixedly connected to the support frame 1 to stabilize the water concentration. A treatment tank 2 5 for breaking down complexes and oxidizing wastewater is fixedly connected to the support frame 4.

[0019] Reference Figures 2 to 3The top of the treatment tank 2 is connected to an inlet pipe 21. A drain pipe 22 is connected to the bottom of the treatment tank 2, away from the inlet pipe 21. The bottom of the treatment tank 2 is sloped, with the lowest point being near the drain pipe 22. A rotating shaft 23 is rotatably mounted at the center of the treatment tank 2 along its height. The upper and lower ends of the rotating shaft 23 pass through the upper and lower ends of the treatment tank 2, respectively. The rotating shaft 23 is I-shaped, and a stirring rod 24 is fixedly connected to its outer surface. Multiple sets of stirring rods 24 are provided, which are spiral in shape and evenly distributed on the outer surface of the rotating shaft 23. Multiple sets of stirring rods 24 are provided inside the processing tank 2. A drive fan blade 25 is fixedly connected to the outer surface of the rotating shaft 23. The drive fan blade 25 is provided inside the processing tank 2 and is located above the stirring rods 24. There are five sets of drive fan blades 25, which are evenly distributed on the outer surface of the rotating shaft 23. The drive fan blade 25 is spiral in shape. The inlet of the liquid inlet pipe 21 and the through-hole of the processing tank 2 are located above the drive fan blade 25.

[0020] The above solution utilizes an integrated structure consisting of a treatment tank 2, an inlet pipe 21, a drain pipe 22, a rotating shaft 23, a stirring rod 24, and a drive fan blade 25. The impact force of water entering through the inlet pipe 21 drives the fan blade 25 to rotate, simultaneously rotating the rotating shaft 23 and the spiral stirring rod 24. This eliminates the need for an additional power motor, enabling the homogenization and mixing of the rinsing wastewater and stabilizing the concentration of the inlet water. The sloping design at the bottom of the treatment tank 2 guides the wastewater to flow completely to the drain pipe 22, preventing sludge accumulation and wastewater retention at the bottom of the tank. This solution is suitable for continuous adjustment of low-concentration rinsing wastewater.

[0021] Reference Figures 4 to 6A filter element 3 is arranged on a liquid discharge pipe 22 on the first treatment tank 2. The filter element 3 comprises a mounting box 31 which is in through connection with the liquid discharge pipe 22 on the first treatment tank 2. The liquid discharge pipe 22 and the mounting box 31 are distributed in a middle-shaped structure. Two groups of mounting plates 32 are fixedly connected to the side end of the mounting box 31, are symmetrically distributed on both sides of the mounting box 31, and are flush with the bottom of the mounting box 31. A switching block 33 is inserted into the mounting box 31, the switching block 33 penetrates through the upper and lower ends of the mounting box 31, and the switching block 33 is T-shaped. A hydraulic rod 34 is fixedly connected to the bottom end of the mounting plate 32, the movable end of the hydraulic rod 34 penetrates through the mounting plate 32 and is fixedly connected with the switching block 33. The switching block 33 is provided with flow holes 35 penetrating along the axial direction of the liquid discharge pipe 22, multiple groups of the flow holes 35 are uniformly distributed along the height direction of the mounting box 31. A region where no flow hole 35 is provided is reserved at a position below the switching block 33, and this region is a blocking region. In an initial state, the blocking region is located in the mounting box 31 and blocks the liquid discharge pipe 22, so that liquid is stored in the first treatment tank 2. A filter plate 36 is fixedly connected to the side of the flow hole 35 away from the first treatment tank 2. The switching block 33 is driven by the hydraulic rod 34 to move up and down, so that a group of flow holes 35 above the blocking region is aligned with the liquid discharge pipe 22, and wastewater in the first treatment tank 2 passes through the flow holes 35. Meanwhile, fine metal coating powder and suspended impurities in the wastewater are filtered by the filter plate 36 and retained in the flow holes 35, and the flow holes 35 can be switched through the hydraulic rod 34.

[0022] By adopting the above scheme, through the matching structure of the mounting box 31, the mounting plate 32, the switching block 33, the hydraulic rod 34, the flow holes 35 and the filter plates 36 in the filter element 3, the hydraulic rod 34 drives the switching block 33 to displace vertically, so that the station switching between the blocking region and multiple groups of flow holes 35 can be realized. The scheme can not only close the pipeline to store liquid in the first treatment tank, but also gradually activate different filter plates 36 to intercept fine metal coating powder and suspended impurities. After a single group of filter plates is blocked, it can be seamlessly switched to the next group without shutdown and pipeline disassembly, effectively ensuring the continuous and stable operation of the filtration process.

[0023] Refer to Figure 7The second treatment tank 5 is also equipped with an inlet pipe 21, a drain pipe 22, a rotating shaft 23, a stirring rod 24, and a drive fan blade 25. The drain pipe 22 at the upper end of the first treatment tank 2 is connected to the inlet pipe 21 on the second treatment tank 5. A dosing port 51 is opened through the top of the second treatment tank 5. Adsorbent 6 and adsorbent 7 are installed on the drain pipe 22 of the second treatment tank 5. Adsorbent 6 and adsorbent 7 are provided in multiple sets in a straight line, distributed along the axis of the drain pipe 22. Adsorbent 6 and adsorbent 7 also include a mounting box 31, a mounting plate 32, a switching block 33, a hydraulic rod 34, and a flow hole 35. The flow hole 35 in adsorbent 6 is filled with a mercapto-SH functional special chelating resin, which is specifically designed for mixed rinsing wastewater containing silver and nickel. It selectively captures silver ions, while nickel ions completely penetrate. The flow hole 35 in adsorbent 7 is filled with a nickel-specific cation exchange resin.

[0024] The above scheme is adopted: through the modular adsorption structure of treatment tank 2 5 with adsorbent 1 6 and adsorbent 2 7, the complexed wastewater flows sequentially through adsorbent 1 6 filled with mercapto chelating resin and adsorbent 2 7 filled with cation exchange resin, and the selective capture of silver ions and the enrichment and retention of nickel ions are completed step by step, so as to achieve precise separation of silver and nickel. Multiple adsorption units are arranged along the pipeline, and with the help of the switching block 33 structure, the saturated unit can be switched online for desorption and regeneration without interrupting the wastewater treatment process, ensuring the purity of metal recovery and the system treatment efficiency.

[0025] The working principle of this invention is as follows: First, the system is initially set up and the rinsing wastewater is homogenized. Before the system starts, the blocking area of ​​the switching block 33 inside the filter element 3 is aligned with the drain pipe 22, completely sealing the outlet passage of the treatment tank 2. The silver-nickel rinsing wastewater discharged from the electroplating production line is continuously injected into the treatment tank 2 through the inlet pipe 21. The inlet water flows from top to bottom, impacting the spiral blades of the drive fan 25, causing the drive fan 25 to rotate around the axis of the rotating shaft 23. The rotating shaft 23 simultaneously drives multiple sets of spiral stirring rods 24 to slowly rotate inside the treatment tank 2, which continuously flows into the tank. The rinsing wastewater is stirred and mixed to ensure that the wastewater with fluctuating concentrations at different times is fully mixed and the overall water quality concentration is stabilized. The liquid level in the treatment tank 2 continues to rise with the inflow of water. The sloping structure at the bottom end can prevent the waste liquid from stagnating and accumulating in the corner areas, ensuring that the waste liquid in the tank participates in the overall circulation and mixing. When the liquid level in the treatment tank 2 reaches the preset treatment height, the hydraulic rod 34 is activated and pushes the switching block 33 upward to slide vertically along the mounting box 31, so that the first set of flow holes 35 above the sealing area is completely aligned with the drain pipe 22. The homogenized rinsing wastewater in the treatment tank 2 flows out through the flow holes 35. The second step involves multi-stage switchable filtration and impurity interception. When wastewater flows through the flow hole 35, the filter plate 36 inside the channel intercepts the fine metal coating powder and suspended particulate impurities carried in the water. The filtered impurities remain inside the flow hole 35 near the water inlet side and will not enter the subsequent pipeline with the water flow. As the filtration time increases, the impurities intercepted on the surface of the first set of filter plates 36 gradually increase, and the pipeline flow resistance gradually increases. At this time, the hydraulic rod 34 continues to drive the switching block 33 to move upward, switching the second set of clean flow holes 35 and filter plates 36 to the working position aligned with the drain pipe 22, and taking over the filtration operation. The entire switching process does not require interruption of water flow and can maintain continuous wastewater delivery. Multiple sets of flow holes 35 can be used in turn until all filter plates reach the clogging threshold, and then the machine is stopped for cleaning and replacement, which greatly extends the single continuous operation time. The filtered wastewater is transported through the pipeline to the inlet pipe 21 of the treatment tank 2 5 and injected into the complex breaking reaction chamber. The third step involves a mild complex-breaking oxidation reaction and mixing with the reagent. After the filtered rinsing wastewater enters the second treatment tank 5, a low dose of oxidizing agent is quantitatively added through the dosing port 51 to dissociate trace amounts of complexed silver and nickel metals in the wastewater. The influent water flow impacts the drive fan blade 25 inside the second treatment tank 5, causing the rotating shaft 23 and the stirring rod 24 to rotate synchronously, so that the oxidizing agent and wastewater are fully mixed and in contact. Under mild operating conditions, the metal complex bonds are broken, and the complexed silver and complexed nickel are converted into free metal ions, providing reaction conditions for subsequent adsorption and enrichment. The second treatment tank 5 also adopts a sloping bottom design to ensure that the waste liquid is completely discharged after the reaction and to avoid the accumulation of reaction precipitates at the bottom of the tank. The fourth step involves selective adsorption and enrichment of silver and nickel. The wastewater, after complex breaking, flows out through the drain pipe 22 of treatment tank 25. It first flows through multiple sets of adsorbent elements 6. The mercapto chelating resin filling the flow holes 35 specifically captures silver ions in the water. Nickel ions, along with other salts and additives, are not adsorbed and directly penetrate adsorbent elements 6 with the water flow. The desilvered wastewater continues to flow along the pipeline into adsorbent element 7. The nickel-specific cation exchange resin in the flow holes 35 enriches and retains free nickel ions, completing the stepwise separation and concentration of silver and nickel. The treated wastewater is then desilvered. The system is a clean water outflow system, which enters the subsequent deep purification and reuse unit. When the resin adsorption in a single adsorption unit 6 or adsorption unit 7 reaches saturation, the hydraulic rod 34 of the corresponding unit drives the switching block 33 to move, switching to the standby adsorption unit to continue operation. The saturated unit is connected to the desorption agent pipeline for resin regeneration. The high-concentration silver and nickel enriched solutions obtained by elution are respectively transported to the electrolytic purification unit to recover high-purity metals. The adsorption resin can still maintain a stable adsorption capacity after multiple desorption and regeneration. The whole process can achieve continuous and uninterrupted processing, which is suitable for the 24-hour operation requirements of electroplating production lines. The built-in non-powered stirring structure of treatment tank 2 and treatment tank 5 allows for the homogenization of wastewater and mixing of reagents solely through the impact force of the incoming water flow. This eliminates the need for an additional stirring motor, reducing energy consumption and mechanical failure points. Combined with the sloping bottom design and switchable filter structure, it can adapt to the continuously fluctuating drainage conditions of rinsing wastewater, stabilizing the quality and quantity of incoming water and providing reliable inlet conditions for subsequent metal adsorption and recovery processes. This reduces the impact of water quality fluctuations on recovery efficiency. The switchable modular design of filter element 3 and adsorption elements 6 and 7 allows for filter plate rotation and adsorption resin desorption and regeneration without interrupting the wastewater treatment process. This eliminates the need for shutdown and pipeline disassembly, significantly reducing downtime. The multi-station rotation mode can adapt to 24-hour continuous operation of electroplating production lines, reducing the frequency of manual operation and on-site maintenance difficulty, and improving the overall operational stability of the system.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid, including: A first support frame (1) and a second support frame (4), characterized in that the first support frame (1) is fixedly connected with a first treatment tank (2) for collecting rinsing wastewater and performing homogenization treatment to stabilize water quality concentration, and the second support frame (4) is fixedly connected with a second treatment tank (5) for carrying out complex breaking oxidation on the wastewater; A liquid inlet pipe (21) is penetratingly connected to the top end of said first treatment tank (2), a liquid discharge pipe (22) is penetratingly connected to the side end of said first treatment tank (2), a rotating shaft (23) is rotatably arranged along the height direction at the center of said first treatment tank (2), the upper and lower ends of said rotating shaft (23) respectively penetrate through the upper and lower ends of the first treatment tank (2), a stirring rod (24) is fixedly connected to the outer circular surface of said rotating shaft (23), a driving fan blade (25) is fixedly connected to the outer circular surface of said rotating shaft (23), said driving fan blade (25) is arranged inside the first treatment tank (2) and located above the stirring rod (24); A filtering member (3) is arranged on the liquid discharge pipe (22) on said first treatment tank (2); Said filtering member (3) comprises a mounting box (31) penetratingly connected with the liquid discharge pipe (22) on the first treatment tank (2), a mounting plate (32) is fixedly connected to the side end of said mounting box (31), a switching block (33) is inserted into said mounting box (31), said switching block (33) penetrates through the upper and lower ends of the mounting box (31), a hydraulic rod (34) is fixedly connected to the bottom end of said mounting plate (32), the movable end of said hydraulic rod (34) penetrates through the mounting plate (32) and is fixedly connected with the switching block (33), a flow hole (35) is penetratingly opened on said switching block (33) along the axial direction of the liquid discharge pipe (22), a filter plate (36) is fixedly connected to the side of said flow hole (35) away from the first treatment tank (2).

2. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 1, characterized in that, Said liquid discharge pipe (22) is arranged on the side of the first treatment tank (2) away from the liquid inlet pipe (21), and is close to the inner bottom end of the first treatment tank (2), the bottom end of said first treatment tank (2) is an inclined surface, and the side close to the liquid discharge pipe (22) is the lowest end.

3. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 2, characterized in that, Said rotating shaft (23) is I-shaped, said stirring rods (24) are provided in multiple groups, are spiral-shaped and are uniformly distributed on the outer circular surface of the rotating shaft (23), multiple groups of said stirring rods (24) are arranged inside the first treatment tank (2), said driving fan blades (25) are provided in five groups, are uniformly distributed on the outer circular surface of the rotating shaft (23), said driving fan blades (25) are spiral-shaped, the communication opening between said liquid inlet pipe (21) and the first treatment tank (2) is located above the driving fan blades (25).

4. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 3, characterized in that, Said liquid discharge pipe (22) and the mounting box (31) are distributed in a Chinese character 'zhong' shape, said mounting plates (32) are provided in two groups, are symmetrically distributed on both sides of the mounting box (31) and are flush with the bottom of the mounting box (31), said switching block (33) is T-shaped.

5. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 4, characterized in that, Said flow holes (35) are provided in multiple groups, are uniformly distributed along the height direction of the mounting box (31), a region without flow holes (35) is reserved at a position below the switching block (33), this region is a blocking region, in the initial state, the blocking region is located inside the mounting box (31) and blocks the liquid discharge pipe (22), so that liquid is stored inside the first treatment tank (2).

6. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 5, characterized in that, The second treatment tank (5) is also equipped with an inlet pipe (21), an outlet pipe (22), a rotating shaft (23), a stirring rod (24) and a drive fan blade (25). The outlet pipe (22) at the upper end of the first treatment tank (2) is connected to the inlet pipe (21) on the second treatment tank (5). The top of the second treatment tank (5) is provided with a dosing port (51).

7. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 6, characterized in that, The treatment tank 2 (5) is equipped with an adsorption element 1 (6) and an adsorption element 2 (7) on the drain pipe (22). The adsorption element 1 (6) and the adsorption element 2 (7) are provided in multiple sets in a straight line, distributed along the axis of the drain pipe (22).

8. The integrated system for resource recovery and wastewater treatment of silver / nickel electroplating waste liquid according to claim 7, characterized in that, The first adsorbent (6) and the second adsorbent (7) also include a mounting box (31), a mounting plate (32), a switching block (33), a hydraulic rod (34) and a flow hole (35). The flow hole (35) in the first adsorbent (6) is filled with a mercapto (-SH) functional special chelating resin, and the flow hole (35) in the second adsorbent (7) is filled with a nickel-specific cation exchange resin.

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