A recovery treatment device for nickel-containing wastewater

Abstract

The application discloses a kind of recovery processing device of nickel-containing wastewater, comprising: processing component, including processing shell, built-in partition, partition and the inner wall of processing shell are enclosed to form two unit cavities, two mesh plates are distributed in each unit cavity, two liquid inlets and two liquid outlets are provided on processing shell;Liquid inlet component, including two liquid inlet pipes;Liquid outlet component, including two liquid outlet pipes;Switching component is used to control two liquid inlet pipes respectively work in flushing mode and absorption mode, control two liquid outlet pipes respectively work in recovery mode and dilution mode.The recovery processing device of nickel-containing wastewater compared with prior art, by switching component, the working mode of two liquid inlet pipes and two liquid outlet pipes is conveniently and quickly switched, so that two unit cavities always have one to be connected with nickel-containing wastewater for resin adsorption and the remaining one to be connected with flushing liquid for resin regeneration, without adjusting processing shell cover degree, energy consumption is saved and worker burden is reduced.

Description

Technical Field

[0001] This invention relates to equipment for treating electroplating wastewater, and more particularly to a device for recycling and treating nickel-containing wastewater. Background Technology

[0002] Electroplating is a process that uses the principle of electrolysis to plate a thin layer of metal or alloy onto the surface of metal parts. It is widely used for surface protection and performance enhancement of products such as automotive trim parts and mechanical parts. Nickel sulfate, as the main salt for supplying nickel in electroplating solutions, generates a large amount of nickel-containing wastewater and other electroplating wastewater during the electroplating production of automotive parts. Direct discharge of this wastewater would waste nickel resources, increase the cost of electroplating raw materials for enterprises, and cause environmental pollution. Therefore, it is usually necessary to recycle and treat the nickel sulfate in the electroplating wastewater.

[0003] Currently, chelating ion exchange resins are typically used to adsorb and separate nickel ions from wastewater due to their specific affinity for nickel ions. After the resin becomes saturated, nickel ions are desorbed and enriched through acid regeneration. At the same time, the resin can be recycled after restoring its adsorption capacity. The high-concentration nickel sulfate solution desorbed can be directly used in electroplating production lines after concentration, thus forming a closed loop for nickel resource recovery.

[0004] In the prior art, such as the Chinese utility model patent with announcement number CN223073957U, a nickel sulfate electroplating recovery and treatment device is disclosed. The treatment tank is divided into two parts by a partition. By switching the position of the storage tank in the treatment tank, the resin can switch between the absorption of ions and the regeneration and reduction state, thereby realizing the recovery and treatment of nickel sulfate electroplating.

[0005] However, when switching the aforementioned device, manual pulling or robotic arm-driven lifting, rotation, and lowering of the storage tank are required. The storage tank then forms a heavy solid-liquid combination with the internal resin and residual solution. The entire switching process is slow and energy-intensive, increasing the workload of workers. Collisions and friction are prone to occur during the switching process, leading to an increased failure rate. Furthermore, the device relies on a mechanical structure composed of motors, protrusions, and transmission plates to drive the storage tank up and down. Such mechanical transmission structures are complex and prone to failures such as protrusion wear and transmission plate deformation after long-term use. Moreover, the up-and-down movement of the storage tank requires a large amount of work, further increasing energy consumption. In addition, the reciprocating movement of the storage tank can only achieve the overall displacement of the internal resin, failing to break up the local accumulation of resin particles. This results in dead zones in the contact between the resin and various solutions, affecting the mixing and contact efficiency, and thus reducing the adsorption efficiency of nickel ions and the regeneration efficiency of the resin.

[0006] Therefore, it is necessary to improve the existing electroplating wastewater recovery devices. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects in the prior art and provide a nickel-containing wastewater recycling and treatment device that reduces the burden on workers, facilitates quick switching, reduces energy consumption and failure rate, and improves adsorption efficiency and regeneration efficiency.

[0008] To achieve the above-mentioned technical effects, the technical solution of the present invention is: a nickel-containing wastewater recovery and treatment device, comprising: The processing assembly includes a processing shell with a vertical partition inside. The partition and the inner wall of the processing shell enclose two spaced unit cavities. Each unit cavity has two mesh plates with densely distributed perforations distributed along the vertical direction to divide the unit cavity into an inlet cavity, a processing cavity, and an outlet cavity that are connected sequentially from top to bottom. The processing shell is provided with two inlet ports that are connected to the inlet cavities of the two unit cavities and two outlet ports that are connected to the outlet cavities of the two unit cavities. The liquid inlet assembly is located above the processing shell and includes two liquid inlet pipes, each a three-way pipe with a flushing mode and an absorption mode. The three ends of the two liquid inlet pipes are respectively a liquid inlet end, a flushing end connected to the two liquid inlets, and an absorption end. The liquid inlet ends of the two liquid inlet pipes are used to introduce nickel-containing wastewater and flushing liquid, respectively. In the flushing mode, the liquid inlet end is connected to the flushing end and isolated from the absorption end. In the absorption mode, the liquid inlet end is connected to the absorption end and isolated from the flushing end. The liquid outlet assembly is located below the processing shell and includes two liquid outlet pipes, each a three-way pipe, corresponding one-to-one with the two liquid inlet pipes and having a recovery mode and a dilution mode. The three ends of the two liquid outlet pipes are respectively a liquid outlet end, a recovery end and a dilution end connected to the two liquid outlets. The liquid outlet ends of the two liquid outlet pipes are used to discharge wastewater with reduced nickel content after resin absorption treatment and wastewater after rinsing with rinsing liquid. In the recovery mode, the recovery end is connected to the liquid outlet end and isolated from the dilution end. In the dilution mode, the dilution end is connected to the liquid outlet end and isolated from the recovery end. A switching component is used to control the two inlet pipes to work in rinsing mode and absorption mode respectively and to switch the working mode periodically. It also controls the two outlet pipes to work in recovery mode and dilution mode respectively and to switch the working mode periodically. The rinsing end of the inlet pipe in rinsing mode is connected to the recovery end of the outlet pipe in recovery mode through one of the unit chambers. The absorption end of the inlet pipe in absorption mode is connected to the dilution end of the outlet pipe in dilution mode through the other unit chamber.

[0009] Preferably, to facilitate the flow of nickel-containing wastewater into one unit chamber through one inlet pipe and out through one outlet pipe, and the flow of rinsing liquid into another unit chamber through another inlet pipe and out through another outlet pipe, the inlet assembly further includes two inlet pipes, each a three-way connector. One inlet pipe has both ends connected to the rinsing ends of the two inlet pipes, and the remaining end connected to one inlet port. The other inlet pipe has both ends connected to the absorption ends of the two inlet pipes, and the remaining end connected to the remaining inlet port. The outlet assembly further includes two drain pipes, each a three-way connector. One drain pipe has one end connected to one outlet port, and the remaining two ends connected to the recovery ends of the two outlet pipes respectively. The other drain pipe has one end connected to another outlet, and the remaining two ends connected to the dilution ends of the two outlet pipes respectively.

[0010] Preferably, to facilitate simultaneous switching of the working modes of the two inlet pipes and the two outlet pipes, a switching valve is provided between the inlet end and the rinsing end, between the inlet end and the absorption end, between the outlet end and the recovery end, and between the outlet end and the dilution end. The switching valve includes a spherical valve block and a valve plate fixedly connected to the valve block with its axis passing through the center of the sphere. The valve block is provided with a through channel. The switching component drives the valve plate to rotate around its own axis to control the isolation and connection between the inlet end and the rinsing end, between the inlet end and the absorption end, and between the outlet end and the recovery end.

[0011] Preferably, in order to achieve synchronous, high-precision, and efficient switching between the working modes of the inlet pipe and the outlet pipe, the switching component includes gears fixed to the valve plate with their coaxial centers one-to-one, racks corresponding to the gears one-to-one, and translation units that drive each rack to move synchronously. The switching component also includes a distance sensor for detecting the movement distance of the output end of the translation unit.

[0012] Preferably, for easy replacement and replenishment of resin, the processing shell includes a barrel with an open top and a detachable lid on the barrel. The mesh plates are detachably installed inside the barrel, and the output end of the translation unit is detachably connected to the rack.

[0013] Preferably, in order to ensure precise assembly and prevent resin from moving into the inlet and outlet chambers, both mesh plates are sealed and fitted to the partition and the circumferential inner wall of the barrel.

[0014] Preferably, for ease of assembly, the inner wall of the barrel is provided with an inner convex frame spaced apart from the bottom wall of the barrel, the lower mesh plate abuts against the upper part of the inner convex frame, and the upper mesh plate is connected to the barrel lid for limiting.

[0015] Preferably, in order to facilitate sufficient contact between the resin and the solution and improve absorption and regeneration efficiency, an aeration component is also included. The aeration component includes an air pump, the input end of which is connected to the liquid inlet chamber of the two unit chambers, and the output end of which is connected to the liquid outlet chamber of the two unit chambers and is connected to two one-way valves corresponding to the two unit chambers. The outlet of the one-way valve is located between the inlet of the one-way valve and the corresponding liquid outlet chamber.

[0016] Preferably, in order to facilitate the detection of the liquid level in the unit cavity and to coordinate the control of the liquid inlet flow rate of the inlet pipe and the liquid outlet flow rate of the outlet pipe, a liquid level sensor is provided at the top of each of the two unit cavities, an inlet valve is provided at the inlet end of each of the two inlet pipes, and an outlet valve is provided at the outlet end of each of the two outlet pipes.

[0017] Preferably, for convenient gas replenishment and liquid drainage, the air pump has two input terminals, each connected to a switch valve. One input terminal is connected to the liquid inlet chamber of the two unit chambers, and the other is connected to the outside.

[0018] In summary, compared with the prior art, the nickel-containing wastewater recycling and treatment device of the present invention can conveniently and quickly switch the working modes of the two inlet pipes and two outlet pipes by switching components, so that one of the two unit chambers is always filled with nickel-containing wastewater for resin adsorption while the other is filled with rinsing liquid for resin regeneration. There is no need to adjust the treatment shell cover, saving energy and reducing the burden on workers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment; Figure 2 This is a schematic diagram of the structure of the bracket in the first embodiment; Figure 3 This is a schematic diagram of the processing component in the first embodiment; Figure 4 yes Figure 3 Cross-sectional structural diagram; Figure 5 yes Figure 4 Enlarged view of part A; Figure 6 yes Figure 3 An explosion diagram; Figure 7 This is a schematic diagram of the structure of the stencil in the first embodiment; Figure 8 This is a schematic diagram of the structure of the bucket lid in the first embodiment; Figure 9 This is a schematic diagram of the liquid inlet assembly in the first embodiment; Figure 10 yes Figure 9 An explosion diagram; Figure 11This is a schematic diagram of the liquid outlet assembly in the first embodiment; Figure 12 yes Figure 11 An explosion diagram; Figure 13 This is a schematic diagram of the translation unit in the first embodiment; Figure 14 This is a schematic diagram of the structure of the second embodiment; Figure 15 This is a partial structural schematic diagram of the second embodiment; Figure 16 yes Figure 15 Cross-sectional structural diagram; In the diagram: 1. Processing component; 11. Processing shell; 111. Barrel body; 1111. Inner convex frame; 1112. Flanged edge; 1113. Positioning hole; 112. Barrel lid; 1121. Positioning rod; 1122. Limiting tube; 1123. Limiting ring; 1124. Positioning sleeve; 113. Clamping groove; 114. Bolt; 115. Nut; 116. Sealing ring; 12. Partition plate; 13. Mesh plate; 131. Mesh; 132. Lower convex frame; 133. Upper convex strip; 134. Limiting rod; 135. Limiting convex plate; 14. Liquid inlet; 15. Liquid outlet; 16. Guide rail; 17. Liquid level sensor; 2. Liquid inlet component; 21. Liquid inlet pipe; 211. Liquid inlet end; 212. Rinsing end; 213. Absorption end; 22 1. Inlet pipe; 23. Inlet valve; 3. Outlet assembly; 31. Outlet pipe; 311. Outlet end; 312. Recovery end; 313. Dilution end; 32. Drain pipe; 33. Outlet valve; 4. Switching assembly; 41. Gear; 42. Rack; 43. Translation unit; 431. Motor; 432. Screw; 433. Screw sleeve; 434. Vertical plate; 435. Screw; 44. Switching valve; 441. Valve block; 4411. Through channel; 442. Valve plate; 443. Valve stem; 45. Distance sensor; 46. Translation frame; 461. Horizontal plate; 5. Aeration assembly; 51. Air pump; 52. Check valve; 53. Switch valve; 6. Bracket; 61. Base plate; 62. Support plate; 63. Support column; 64. Casters. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] First Embodiment

[0022] like Figures 1-13 As shown, a nickel-containing wastewater recycling and treatment device according to a first embodiment of the present invention includes: The processing component 1 includes a processing shell 11. The processing shell 11 has a vertical partition 12 inside. The partition 12 and the inner wall of the processing shell 11 enclose two spaced unit cavities. Each unit cavity has two mesh plates 13 with densely distributed mesh holes 131 distributed along the vertical direction to divide the unit cavity into an inlet cavity, a processing cavity and an outlet cavity that are connected sequentially from top to bottom. The processing shell 11 is provided with two inlet ports 14 that are connected to the inlet cavity of the two unit cavities and two outlet ports 15 that are connected to the outlet cavity of the two unit cavities. The liquid inlet assembly 2 is located above the processing shell 11 and includes two liquid inlet pipes 21, each a three-way pipe with a flushing mode and an absorption mode. The three ends of the two liquid inlet pipes 21 are respectively a liquid inlet end 211, a flushing end 212 connected to two liquid inlets 14, and an absorption end 213. The liquid inlet end 211 of the two liquid inlet pipes 21 is used to introduce nickel-containing wastewater and flushing liquid, respectively. In the flushing mode, the liquid inlet end 211 is connected to the flushing end 212 and isolated from the absorption end 213. In the absorption mode, the liquid inlet end 211 is connected to the absorption end 213 and isolated from the flushing end 212. The liquid outlet assembly 3 is located below the processing shell 11 and includes two liquid outlet pipes 31, each a three-way pipe, corresponding one-to-one with the two liquid inlet pipes 21 and having a recovery mode and a dilution mode. The three ends of the two liquid outlet pipes 31 are respectively the liquid outlet end 311, the recovery end 312 and the dilution end 313 connected to the two liquid outlets 15. The liquid outlet end 311 of the two liquid outlet pipes 31 is used to discharge the wastewater with reduced nickel content after resin absorption treatment and the wastewater after rinsing with rinsing liquid. In the recovery mode, the recovery end 312 is connected to the liquid outlet end 311 and isolated from the dilution end 313. In the dilution mode, the dilution end 313 is connected to the liquid outlet end 311 and isolated from the recovery end 312. The switching component 4 is used to control the two inlet pipes 21 to work in rinsing mode and absorption mode respectively and to switch the working mode periodically. It also controls the two outlet pipes 31 to work in recovery mode and dilution mode respectively and to switch the working mode periodically. The rinsing end 212 of the rinsing mode inlet pipe 21 is connected to the recovery end 312 of the recovery mode outlet pipe 31 through one of the unit chambers. The absorption end 213 of the absorption mode inlet pipe 21 is connected to the dilution end 313 of the dilution mode outlet pipe 31 through the other unit chamber.

[0023] The device processes two unit chambers within the processing shell 11, specifically between the two mesh plates 13 and the partition plate 12 and the inner wall of the processing shell 11. These chambers are used to store chelating ion exchange resin (hereinafter referred to as "resin") that can absorb nickel ions. Of the two inlet pipes 21 in the liquid inlet assembly 2, one inlet end 211 is used to introduce nickel-containing wastewater generated after electroplating, and the other inlet end 211 is used to introduce rinsing liquid. It should be noted that the rinsing liquid includes acid washing liquid and alkaline washing liquid, which are used to regenerate the resin after absorbing nickel ions. Specifically, when regenerating the resin, sulfuric acid solution is first introduced, and the hydrogen ions in the sulfuric acid solution replace the nickel ions absorbed by the resin. Then, sodium hydroxide solution is introduced, and through the neutralization reaction, the residual acid on the resin is eliminated, thereby activating the resin's adsorption capacity, ensuring subsequent adsorption efficiency, and extending the resin's service life.

[0024] To easily distinguish between the two inlet pipes 21 and the two outlet pipes 31, in this embodiment, the two inlet pipes 21 are named the first inlet tee pipe and the second inlet tee pipe, respectively, and the two outlet pipes 31 are named the first outlet tee pipe and the second outlet tee pipe, respectively. The first inlet tee pipe and the second inlet tee pipe are connected to the first outlet tee pipe and the second outlet tee pipe, respectively. The inlet end 211 of the first inlet tee pipe is used to introduce nickel-containing wastewater after electroplating, and the inlet end 211 of the second inlet tee pipe is used to introduce rinsing liquid (including two solutions, acid washing solution and alkaline washing solution) for regenerating the resin. The outlet end 311 of the first outlet tee pipe is used to discharge nickel-containing wastewater with reduced nickel ion concentration after resin absorption treatment, and the outlet end 311 of the second outlet tee pipe is used to discharge the recovered liquid after rinsing and regenerating the resin.

[0025] For further illustrative purposes, Figure 4 As shown in the example, the partition 12 inside the processing shell 11 divides its internal cavity into two separate unit cavities. The top and bottom of each unit cavity are respectively provided with an inlet 14 and an outlet 15 communicating with it. Figure 9 and Figure 10 For example, the liquid inlet pipe 21 on the upper left is the first liquid inlet tee pipe, and the liquid inlet pipe 21 on the lower right is the second liquid inlet tee pipe.

[0026] In the initial state, the first inlet tee is in flushing mode, the second inlet tee is in absorption mode, the first outlet tee is in recovery mode, and the second outlet tee is in dilution mode.

[0027] Rinsing fluid and nickel-containing wastewater are respectively introduced into the inlet end 211 of the first inlet tee pipe and the inlet end 211 of the second inlet tee pipe. The rinsing fluid flows out from the rinsing end 212 of the first inlet tee pipe, enters the inlet chamber of the left unit chamber through the inlet port 14 on the left, and then enters the processing chamber downward through the mesh 131 of the upper mesh plate 13 to rinse the resin. After rinsing, it enters the outlet chamber through the mesh 131 of the lower mesh plate 13, and then exits from the outlet port 15 on the left, enters the recovery end 312 of the first outlet tee pipe, and is discharged from its outlet end 311 along the first outlet tee pipe.

[0028] Meanwhile, nickel-containing wastewater flows out from the absorption end 213 of the second inlet tee pipe, enters the inlet chamber of the right unit chamber through the inlet 14 on the right side, and then enters the treatment chamber downward through the mesh 131 of the upper mesh plate 13. After the nickel-containing wastewater comes into contact with the resin, the resin absorbs the nickel ions in the wastewater, thereby reducing the concentration of nickel ions and forming diluted waste liquid. The diluted waste liquid flows downward into the outlet chamber, and then is discharged from the outlet 15 on the right side, enters the dilution end 313 of the second outlet tee pipe, and is discharged from the outlet end 311 of the first outlet tee pipe.

[0029] During the above workflow, the resin in the left treatment chamber is regenerated, while the resin in the right treatment chamber absorbs nickel ions from the nickel-containing wastewater.

[0030] After running for a period of time, the resin in the left treatment chamber is regenerated, while the resin in the right treatment chamber is saturated and needs to be regenerated. At this time, the working mode of the two inlet pipes 21 and the working mode of the two outlet pipes 31 are adjusted simultaneously by switching component 4. Specifically, after switching component 4 is activated, the first inlet three-way pipe is in absorption mode, the second inlet three-way pipe is in flushing mode, the first outlet three-way pipe is in dilution mode, and the second outlet three-way pipe is in recovery mode.

[0031] More specifically, in this state, the rinsing fluid enters from the inlet end 211 of the first inlet tee pipe, flows along the first inlet tee pipe, flows out from the absorption end 213 of the first inlet tee pipe, enters the inlet chamber of the right unit chamber through the inlet port 14 on the right side, and then enters the processing chamber downward through the mesh 131 of the upper mesh plate 13. After the rinsing fluid comes into contact with the resin in the right processing chamber, the resin is regenerated and restored. The resulting recovered liquid enters the outlet chamber through the mesh 131 of the lower mesh plate 13, and then exits from the outlet port 15 on the right side. It then enters the dilution end 313 of the first outlet tee pipe and exits from its outlet end 311 along the first outlet tee pipe.

[0032] Correspondingly, the nickel-containing wastewater enters through the inlet end 211 of the second inlet tee pipe, flows along the second inlet tee pipe, flows out through the flushing end 212 of the second inlet tee pipe, enters the inlet chamber of the left unit chamber through the inlet port 14 on the left, and then enters the treatment chamber downward through the mesh 131 of the upper mesh plate 13. After the nickel-containing wastewater comes into contact with the resin in the left treatment chamber, the resin absorbs the nickel ions in the wastewater, thereby reducing the nickel concentration in the wastewater and forming absorbed waste liquid. The waste liquid enters the outlet chamber through the mesh 131 of the lower mesh plate 13, and then exits from the outlet port 15 on the left, enters the recovery end 312 of the second outlet tee pipe, and is discharged from its outlet end 311 along the second outlet tee pipe.

[0033] During the above workflow, the resin in the left treatment chamber absorbs nickel ions from the nickel-containing wastewater, while the resin in the right treatment chamber is regenerated.

[0034] After running for a period of time, the resin in the right treatment chamber is regenerated, while the resin in the left treatment chamber is saturated and needs to be regenerated. At this time, the working modes of the two inlet pipes 21 and the two outlet pipes 31 are adjusted simultaneously by switching component 4. Specifically, after switching component 4 is activated, the first inlet tee is in flushing mode, the second inlet tee is in absorption mode, the first outlet tee is in recovery mode, and the second outlet tee is in dilution mode. This cycle continues.

[0035] When the device is in use, regardless of how the switching component 4 operates, the working mode of the two inlet pipes 21 and the two outlet pipes 31 is controlled. The rinsing liquid is always introduced from the inlet end 211 of the first inlet tee pipe. After contacting the resin that needs to be regenerated, it forms a recycled liquid and is always discharged through the outlet end 311 of the first outlet tee pipe. Correspondingly, the nickel-containing wastewater after electroplating is always introduced from the inlet end 211 of the second inlet tee pipe. After contacting the regenerated resin, the nickel ion concentration decreases, forming a diluted solution with a reduced nickel ion concentration. The diluted wastewater is always discharged from the outlet end 311 of the second outlet tee pipe.

[0036] Therefore, during operation, the two inlet pipes 211 and the two outlet pipes 311 always discharge specific solutions. By changing the flow path of the nickel-containing wastewater and rinsing liquid through the switching component 4, the nickel-containing wastewater and rinsing liquid are introduced into the two unit chambers respectively, and the flow path is adjusted periodically. This allows the resin in one unit chamber to absorb nickel ions while the other undergoes regeneration. The entire switching process does not require changing the position of the two unit chambers or performing mechanical adjustments such as lifting or rotating the processing shell 11. It only requires switching the working mode of the two inlet pipes 21 and the two outlet pipes 31 simultaneously through the switching component 4, which facilitates rapid switching. Compared with the switching method of changing the position of the unit chamber and the processing shell 11, it can save power consumption significantly, facilitate rapid switching, and avoid device wear and failure caused by position switching.

[0037] The recycling device in this embodiment also includes a support 6. The processing component 1, the liquid inlet component 2, the liquid outlet component 3 and the switching component 4 are all mounted on the support 6, which facilitates the installation of the device.

[0038] A further improvement is that the liquid inlet assembly 2 also includes two liquid inlet pipes 22, each a three-way connector. One of the liquid inlet pipes 22 has both ends connected to the flushing end 212 of the two liquid inlet pipes 21, and the remaining end connected to one of the liquid inlets 14. The other liquid inlet pipe 22 has both ends connected to the absorption end 213 of the two liquid inlet pipes 21, and the remaining end connected to the remaining liquid inlet 14. The liquid outlet assembly 3 also includes two liquid outlet pipes 32, each a three-way connector. One of the liquid outlet pipes 32 has one end connected to one of the liquid outlets 15, and the remaining two ends connected to the recovery end 312 of the two liquid outlet pipes 31. The other liquid outlet pipe 32 has one end connected to the other liquid outlet 15, and the remaining two ends connected to the dilution end 313 of the two liquid outlet pipes 31.

[0039] With this design, it is easy to guide the flow path of nickel-containing wastewater and rinsing fluid, so that after the switching component 4 is activated, the nickel-containing wastewater and rinsing fluid pass through the two unit chambers simultaneously.

[0040] For ease of explanation, the two inlet pipes 22 are defined as the first inlet tee pipe and the second inlet tee pipe, respectively. Each inlet pipe 22 has one output end and two input ends. The output ends of the first inlet tee pipe and the second inlet tee pipe are fixedly connected to the top of the two inlet ports 14. One input end of the first inlet tee pipe and one input end of the second inlet tee pipe are fixedly connected to the flushing end 212 of the first inlet tee pipe and the flushing end 212 of the second inlet tee pipe, respectively. The remaining output end of the first inlet tee pipe and the remaining output end of the second inlet tee pipe are fixedly connected to the absorption end 213 of the first inlet tee pipe and the absorption end 213 of the second inlet tee pipe, respectively.

[0041] Correspondingly, the two drain pipes 32 are defined as the first drain tee and the second drain tee, respectively. Each drain pipe 32 has one input end and two output ends. The input ends of the two drain pipes 32 are fixedly connected to the bottom of the two outlets 15. One output end of the first drain tee and one output end of the second drain tee are fixedly connected to the recovery end 312 and the dilution end 313 of the first outlet tee, respectively. The remaining output end of the second drain tee and the remaining output end of the second drain tee are fixedly connected to the recovery end 312 and the dilution end 313 of the second outlet tee, respectively.

[0042] After adopting the above structure, in the initial stage of device operation, that is, when the first inlet tee is in flushing mode, the second inlet tee is in absorption mode, the first outlet tee is in recovery mode, and the second outlet tee is in dilution mode, the flow path of the flushing liquid is as follows: inlet end 211 of the first inlet tee, flushing end 212, one input end and output end of the first inlet tee, left inlet 14, left unit cavity, left outlet 15, input end and one input end of the first outlet tee, recovery end 312 and outlet end 311 of the first outlet tee; correspondingly, the flow path of nickel-containing wastewater is as follows: inlet end 211 of the second inlet tee, absorption end 213, one input end and output end of the second inlet tee, right inlet 14, right unit cavity, right outlet 15, input end and one input end of the second outlet tee, dilution end 313 and outlet end 311 of the second outlet tee.

[0043] like Figures 9-12 As shown, in this embodiment, the processing shell 11 is cylindrical. The liquid inlet assembly 2 and the liquid outlet assembly 3 are symmetrically distributed with the symmetry plane being a horizontal plane. The distance between this horizontal plane and the top of the processing shell 11 is the same as the distance between this horizontal plane and the bottom of the processing shell 11. The liquid inlet ends 211 of the two liquid inlet pipes 21 are coaxial and back-to-back. The liquid outlet ends 311 of the two liquid outlet pipes 31 are coaxial and back-to-back. In the same liquid inlet pipe 21, the rinsing end 212 and the absorption end 213 are vertical and downward. The rinsing end 212 and the absorption end 213 are located on the same horizontal plane and are mirror images of each other on both sides of the vertical plane where the axial line of the liquid inlet end 211 is located. Correspondingly, in the same liquid outlet pipe 31, the recovery end 312 and the dilution end 313 are vertical and upward. The recovery end 312 and the dilution end 313 are located on the same horizontal plane and are mirror images of each other on both sides of the vertical plane where the axial line of the liquid outlet end 311 is located.

[0044] A further improvement is that a switching valve 44 is provided between the inlet end 211 and the rinsing end 212, between the inlet end 211 and the absorption end 213, between the outlet end 311 and the recovery end 312, and between the outlet end 311 and the dilution end 313. The switching valve 44 includes a spherical valve block 441 and a valve plate 442 fixedly connected to the valve block 441 and whose axis passes through the center of the ball of the valve block 441. A through channel 4411 is provided on the valve block 441. The switching component 4 drives the valve plate 442 to rotate around its own axis to control the isolation and connection between the inlet end 211 and the rinsing end 212, between the inlet end 211 and the absorption end 213, and between the outlet end 311 and the recovery end 312.

[0045] In this embodiment, eight switching valves 44 are provided. Each switching valve 44 also includes a valve stem 443 extending vertically. The two ends of the valve stem 443 are fixedly connected to the valve plate 442 and the valve block 441 coaxially, respectively. The through channel 4411 on the valve block 441 is horizontal. Four switching valves 44 are located above the processing housing 11, and the remaining four switching valves 44 are located below the processing housing 11. The four switching valves 44 located above are respectively located at the inlet end 211 and the rinsing end of the two inlet pipes 21. Between 212 and between the inlet end 211 and the absorption end 213, the outer surface of the valve block 441 is sealed and fitted to the wall of the inlet pipe 21. The valve plate 442 is located above the inlet pipe 21. Correspondingly, the four switching valves 44 located below are respectively set between the outlet end 311 and the recovery end 312 of the two outlet pipes 31, and between the outlet end 311 and the dilution end 313. The valve block 441 is sealed and fitted to the wall of the outlet pipe 31, and the valve plate 442 is located below the outlet pipe 31.

[0046] The distribution directions of the flushing end 212 and the absorption end 213, and the directions of the recovery end 312 and the dilution end 313 are all horizontal first directions. The horizontal direction perpendicular to the first direction is the second direction. Among the two switching valves 44 connected to the same inlet pipe 21, the axial direction of the through channel 4411 corresponding to the two switching valves 44 is always perpendicular. Among the two switching valves 44 connected to the same outlet pipe 31, the axial direction of the through channel 4411 corresponding to the two switching valves 44 is always perpendicular. Furthermore, the through channels 4411 of the two switching valves 44 distributed along the second direction are also always perpendicular to each other. In addition, the line connecting the centers of the valve blocks 441 of the eight switching valves 44 forms a cuboid. The through channels 4411 corresponding to the two switching valves 44 distributed vertically are parallel in axis. In this way, it is ensured that when nickel-containing wastewater passes through the device, the direction of entry and the direction of exit are parallel and the entry position is directly above the exit position. When flushing liquid passes through the device, the direction of entry and the direction of exit are parallel and the entry position is directly above the exit position, which facilitates the pipeline layout.

[0047] A further improvement is that the switching assembly 4 includes gears 41 fixed on the valve plate 442 with their coaxial centers, racks 42 corresponding to the gears 41, and translation units 43 that drive each rack 42 to move synchronously. The switching assembly 4 also includes a distance sensor 45 for detecting the movement distance of the output end of the translation unit 43.

[0048] In this embodiment, gear 41 is fixedly sleeved on the outside of valve plate 442 with its axis vertical. The length direction of rack 42 is parallel to the first direction. Translation unit 43 drives rack 42 to move along the first direction, acting on gear 41. This causes valve plate 442 to rotate around its own axis, while simultaneously causing first valve block 441 to rotate via valve rod 443, changing the direction of through channel 4411. There are eight gears 41 and eight racks 42. The output end of translation unit 43 is connected to the eight racks 42. Thus, translation unit 43 can rotate all eight valve blocks 441 simultaneously, changing the direction of eight through channels 4411. This allows for simultaneous changes in the working modes of two inlet pipes 21 and two outlet pipes 31, making operation convenient and quick, reducing the workload of workers, lowering the power consumption for switching operations, and avoiding failure rates caused by wear.

[0049] A further improvement is that the processing shell 11 includes a barrel 111 with an open top and a barrel cover 112 that can be detachably installed on the barrel 111. The mesh plates 13 can be detachably installed inside the barrel 111, and the output end of the translation unit 43 is detachably connected to the rack 42.

[0050] With the above design, it is convenient to replenish or replace the resin in the processing shell 11. By disassembling the output end of the translation unit 43 from the rack 42 above, removing the barrel cover 112 from the barrel body 111, and removing the mesh plate 13, the resin can be replaced or replenished.

[0051] A further improvement is that both mesh plates 13 are sealed and fitted to the partition plate 12 and the circumferential inner wall of the tank body 111. This ensures the assembly accuracy of the mesh plates 13 and prevents them from vertically detaching from the processing chamber and entering the inlet or outlet chamber.

[0052] A further improvement is that an inner protruding frame 1111 is provided on the inner wall of the barrel 111, which is spaced apart from the bottom wall of the barrel 111. The lower mesh plate 13 abuts against the upper part of the inner protruding frame 1111, and the upper mesh plate 13 is limitedly connected to the barrel lid 112.

[0053] With the above design, the inner convex frame 1111 facilitates the support of the lower mesh plate 13. The lower mesh plate 13 can slide vertically within the unit cavity. The upper mesh plate 13 is connected to the barrel lid 112 for limiting, which facilitates the adjustment of the height position of the upper mesh plate 13. This allows the upper mesh plate 13 to automatically adjust its height position according to the amount of resin on the lower mesh plate 13, avoiding a fixed position of the upper mesh plate 13 that would result in a fixed capacity of the processing cavity. Furthermore, the upper mesh plate 13 is connected to the barrel lid 112 for limiting, and the upper mesh plate 13 is sealed and fitted to the inner wall of the unit cavity, ensuring the assembly accuracy of the barrel lid 112 and simplifying the assembly steps. This facilitates quick assembly and disassembly of the mesh plate 13, barrel body 111, and barrel lid 112.

[0054] Specifically, such as Figure 2 As shown, the support 6 includes a horizontal base plate 61, with casters 64 below the base plate 61 to facilitate the movement of the device. Two support plates 62 are fixed above the base plate 61, distributed along the second direction and arranged vertically. The barrel 111 is fixedly mounted above the two support plates 62, and the two liquid outlet pipes 31 are sealed and pass through the two support plates 62 respectively.

[0055] like Figures 3-6 As shown, a ring-shaped flange 1112 is fixed on the outer edge of the top circumference of the barrel body 111. Positioning holes 1113 are distributed in a ring array on the flange 1112. The barrel lid 112 is fixedly placed on the top of the barrel body 111, and the bottom surface is distributed in a ring array with positioning rods 1121 that correspond to the positioning holes 1113 and cooperate with the brackets, so as to ensure the assembly accuracy of the barrel lid 112 and the barrel body 111.

[0056] Two opposing clamping grooves 113 are provided on the outside of the lid 112 and the flange 1112. Both clamping grooves 113 are through grooves with a semi-circular extension trajectory. The two ends of the two clamping grooves 113 are fixedly connected by threaded bolts 114 and nuts 115, so that the two clamping grooves 113 enclose to form an annular groove. The bottom of the annular groove is sealed and fitted with the outer circumferential edge of the flange 1112 and the outer circumferential edge of the lid 112. An elastic sealing ring 116 is sandwiched between the two inner sidewalls of the annular groove and the flange 1112 and the lid 112. The sealing ring 116 is preferably a rubber ring to ensure a stable and sealed connection between the lid 112 and the flange 1112.

[0057] The partition 12 is vertically arranged, with its bottom fixed to the inner bottom wall of the barrel 111 and its top sealed to the bottom surface of the barrel lid 112. Two positioning sleeves 1124 are fixed below the barrel lid 112. The outer circumferential edges of the two positioning sleeves 1124 are fitted and connected to the top of the partition 12 and the inner wall of the barrel 111 to further ensure sealing and assembly accuracy.

[0058] The inlet 14 is located on the lid 112 and inside the positioning sleeve 1124, and the outlet 15 is located at the bottom of the body 111. The inlet 14 and outlet 15 correspond one-to-one and are coaxial. Below the lid 112 and inside the positioning sleeve 1124, two limiting tubes 1122 extending vertically are fixed. The bottom of the limiting tubes 1122 is fixed with a limiting ring 1123. The inner diameter of the limiting ring 1123 is smaller than the inner diameter of the limiting tube 1122. The upper mesh plate 13 has an upper protrusion 133 and a limiting rod 134 fixed on its top surface. The limiting rod 134 slides through the limiting ring 1123 and has a limiting protrusion 135 fixed at its top end inside the limiting tube 1122. In this way, the upper protrusion 133 fits snugly against the inner wall of the barrel 111. Thus, while achieving the limiting connection between the barrel lid 112 and the upper mesh plate 13, it also ensures a convenient and high-precision sealed assembly connection between the barrel lid 112, the mesh plate 13, and the barrel 111. The lower mesh plate 13 is located above the inner protrusion frame 1111 and is supported by the inner protrusion frame 1111. A lower protrusion frame 132 is fixed on the bottom surface of the mesh plate 13. The outer circumferential edge of the lower protrusion frame 132 is sealed and fitted against the inner circumferential wall of the inner protrusion frame 1111, ensuring the assembly accuracy of the lower mesh plate 13 and facilitating the replenishment or replacement of resin in the barrel 111.

[0059] A support column 63 is fixed above the base plate 61. The translation unit 43 includes a motor 431, a screw 432, a screw sleeve 433, a vertical plate 434, and screws 435. The motor 431 is fixed to the top of the support column 63 and the output end is coaxially connected to the screw 432. The screw 432 is axially parallel to the first direction. The screw 432 is fitted with a screw sleeve 433. The screw 432 and the screw sleeve 433 are threaded together. A vertical plate 434 is fixed to the end of the screw 432 away from the motor 431. A horizontal plate 461 is detachably fixed to the top and bottom of the vertical plate 434 by screws 435. A horizontal translation frame 46 is welded to the end of the horizontal plate 461 away from the vertical plate 434. The upper translation frame 46 is fixedly connected to the racks 42 corresponding to the four upper switching valves 44 on both sides. The lower translation frame 46 is fixedly connected to the racks 42 corresponding to the four lower switching valves 44 on both sides. Two U-shaped guide rails 16, distributed along the second direction, are fixed at the bottom of the barrel body 111 and above the barrel lid 112. The translation frame 46 is slidably sleeved on the corresponding guide rail 16. The distance sensor 45 is fixed on the support column 63 and faces the vertical plate 434.

[0060] With the above design, the vertical plate 434, horizontal plate 461, and translation frame 46 can be detachably connected via screw 435, thereby achieving a detachable fixed connection between translation unit 43 and rack 42. When adjusting the eight switching valves 44 to control the working mode of the two inlet pipes 21 and two outlet pipes 31, the motor 431 starts, driving the screw 432 to rotate, which acts on the screw sleeve 433. Under the action of the slidingly fitted translation frame 46 and guide rail 16, the vertical plate 434 drives the horizontal plate 461 and translation frame 46 to move, which in turn drives the rack 42 to move, causing the eight gears 41 to rotate synchronously. This changes the axial orientation of the through channel 4411 on the eight valve blocks 441, achieving synchronous switching of the working modes of the two inlet pipes 21 and two outlet pipes 31, reducing the worker's switching burden and achieving rapid switching. The distance sensor 45 can easily detect the moving distance of the vertical plate 434, thereby controlling the rotation angle of the valve block 441.

[0061] Second Embodiment

[0062] like Figures 14-16 As shown, the second embodiment of the present invention provides a nickel-containing wastewater recycling and treatment device, which is based on the first embodiment, but differs in that it further includes an aeration component 5. The aeration component 5 includes an air pump 51. The input end of the air pump 51 is connected to the liquid inlet chamber of the two unit chambers, and the output end is connected to the liquid outlet chamber of the two unit chambers and is connected to two one-way valves 52 corresponding to the two unit chambers. The outlet of the one-way valve 52 is located between the inlet of the one-way valve 52 and the corresponding liquid outlet chamber.

[0063] Specifically, the air pump 51 is fixed on the outer wall of the barrel 111 away from the motor 431. By setting the air pump 51, air is drawn from the top liquid inlet chamber of the two unit chambers and delivered to the bottom liquid outlet chamber of the two unit chambers to form bubbles. When the bubbles float upward through the mesh plate 13 below and through the mesh 131, they make random movements, stirring the resin particles in the treatment chamber, so that the resin moves and comes into full contact with the rinsing liquid and nickel-containing wastewater. This is beneficial to improving the regeneration efficiency of the resin and the absorption efficiency of nickel ions. By setting the one-way valve 52, the solution at the bottom of the unit chamber can be prevented from entering the output end of the air pump 51. Therefore, the one-way valve 52 ensures that the air drawn by the air pump 51 can smoothly enter the bottom of the unit chamber and drive the resin in the treatment chamber to move. Compared with the mechanical method of driving the resin to move, guiding the resin to move by bubbles saves energy and reduces mechanical wear and failure rate. At the same time, the random movement of the introduced bubbles is conducive to the full contact between the solution and the resin particles, thereby improving the adsorption efficiency of nickel ions and improving the regeneration efficiency.

[0064] A further improvement is that a liquid level sensor 17 is installed at the top of each of the two unit chambers, an inlet valve 23 is installed at the inlet end 211 of each of the two inlet pipes 21, and an outlet valve 33 is installed at the outlet end 311 of each of the two outlet pipes 31; the air pump 51 has two input ends, each of which is connected to a switch valve 53, one of which is connected to the inlet chamber of each of the two unit chambers, and the other is connected to the outside.

[0065] By setting up a liquid level sensor 17, the liquid level in the inlet chamber can be easily detected. When the liquid level is too high, the inlet valve 23 is closed while the outlet valve 33 remains open. At the same time, by opening the corresponding switch valve 53 to the outside, another external switch valve 53 is opened, and the air pump 51 draws in external air and introduces it into the unit chamber, which increases the gas volume and pressure in the unit chamber, which is conducive to the gas discharge from the unit chamber. Conversely, when the liquid level is too low, the outlet valve 33 is closed and the inlet valve 23 is opened to facilitate the introduction of external solution, reducing the amount of gas in the unit chamber, so that the unit chamber always maintains a suitable amount of gas. When the liquid level is maintained within the preset range, the device is used with the inlet valve 23 and outlet valve 33 open, the corresponding switch valve 53 closed, and the other switch valve 53 open. The air pump 51 continuously draws air from the top of the unit cavity. The air is delivered to the bottom of the unit cavity by the air pump 51, floats upward, disturbs the resin in the treatment cavity, promotes the absorption of resin and solution, thereby improving the regeneration efficiency of resin and the adsorption efficiency of nickel ions. Then it floats to the inlet cavity at the top of the unit cavity and is drawn by the air pump 51 again. Through the circulation of air, the resin is randomly disturbed, promoting the adsorption of nickel ions and the regeneration of resin.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for recycling and treating nickel-containing wastewater, characterized in that, include: The processing assembly includes a processing shell with a vertical partition inside. The partition and the inner wall of the processing shell enclose two spaced unit cavities. Each unit cavity has two mesh plates with densely distributed perforations distributed along the vertical direction to divide the unit cavity into an inlet cavity, a processing cavity, and an outlet cavity that are connected sequentially from top to bottom. The processing shell is provided with two inlet ports that are connected to the inlet cavities of the two unit cavities and two outlet ports that are connected to the outlet cavities of the two unit cavities. The liquid inlet assembly is located above the processing shell and includes two liquid inlet pipes, each a three-way pipe with a flushing mode and an absorption mode. The three ends of the two liquid inlet pipes are respectively a liquid inlet end, a flushing end connected to the two liquid inlets, and an absorption end. The liquid inlet ends of the two liquid inlet pipes are used to introduce nickel-containing wastewater and flushing liquid, respectively. In the flushing mode, the liquid inlet end is connected to the flushing end and isolated from the absorption end. In the absorption mode, the liquid inlet end is connected to the absorption end and isolated from the flushing end. The liquid outlet assembly is located below the processing shell and includes two liquid outlet pipes, each a three-way pipe, corresponding one-to-one with the two liquid inlet pipes and having a recovery mode and a dilution mode. The three ends of the two liquid outlet pipes are respectively a liquid outlet end, a recovery end and a dilution end connected to the two liquid outlets. The liquid outlet ends of the two liquid outlet pipes are used to discharge wastewater with reduced nickel content after resin absorption treatment and wastewater after rinsing with rinsing liquid. In the recovery mode, the recovery end is connected to the liquid outlet end and isolated from the dilution end. In the dilution mode, the dilution end is connected to the liquid outlet end and isolated from the recovery end. A switching component is used to control the two inlet pipes to work in rinsing mode and absorption mode respectively and to switch the working mode periodically. It also controls the two outlet pipes to work in recovery mode and dilution mode respectively and to switch the working mode periodically. The rinsing end of the inlet pipe in rinsing mode is connected to the recovery end of the outlet pipe in recovery mode through one of the unit chambers. The absorption end of the inlet pipe in absorption mode is connected to the dilution end of the outlet pipe in dilution mode through the other unit chamber.

2. The nickel-containing wastewater recovery and treatment device according to claim 1, characterized in that: The liquid inlet assembly further includes two inlet pipes, each a three-way connector. One inlet pipe has both ends connected to the flushing ends of the two inlet pipes, and the remaining end connected to one of the inlet ports. The other inlet pipe has both ends connected to the absorption ends of the two inlet pipes, and the remaining end connected to the remaining inlet port. The liquid outlet assembly further includes two drain pipes, each a three-way connector. One drain pipe has one end connected to one of the outlet ports, and the remaining two ends connected to the recovery ends of the two outlet pipes. The other drain pipe has one end connected to the other outlet port, and the remaining two ends connected to the dilution ends of the two outlet pipes.

3. The nickel-containing wastewater recovery and treatment device according to claim 1, characterized in that: A switching valve is provided between the inlet end and the rinsing end, between the inlet end and the absorption end, between the outlet end and the recovery end, and between the outlet end and the dilution end. The switching valve includes a spherical valve block and a valve plate fixedly connected to the valve block with its axis passing through the center of the sphere. The valve block is provided with a through channel. The switching component drives the valve plate to rotate around its own axis to control the isolation and connection between the inlet end and the rinsing end, between the inlet end and the absorption end, and between the outlet end and the recovery end.

4. The nickel-containing wastewater recovery and treatment device according to claim 3, characterized in that: The switching assembly includes gears fixed to the valve plate with their coaxial centers one-to-one, racks corresponding to the gears one-to-one, and translation units that drive each rack to move synchronously. The switching assembly also includes a distance sensor for detecting the movement distance of the output end of the translation unit.

5. The nickel-containing wastewater recovery and treatment device according to claim 1, characterized in that: The processing shell includes a barrel body with an open top and a barrel lid that can be detachably covered on the barrel body. All mesh plates can be detachably installed inside the barrel body. The output end of the translation unit is detachably connected to the rack.

6. The nickel-containing wastewater recovery and treatment device according to claim 5, characterized in that: Both mesh panels are sealed and fitted to the partition and the circumferential inner wall of the barrel.

7. The nickel-containing wastewater recovery and treatment device according to claim 5, characterized in that: The inner wall of the barrel is provided with an inner convex frame that is spaced apart from the bottom wall of the barrel. The lower mesh plate abuts against the upper part of the inner convex frame, and the upper mesh plate is connected to the barrel lid for limiting.

8. The apparatus for recovering and treating nickel-containing wastewater according to any one of claims 1-7, characterized in that: It also includes an aeration assembly, which includes an air pump. The input end of the air pump is connected to the liquid inlet chamber of the two unit chambers, and the output end is connected to the liquid outlet chamber of the two unit chambers and is connected to two one-way valves corresponding to the two unit chambers. The outlet of the one-way valve is located between the inlet of the one-way valve and the corresponding liquid outlet chamber.

9. The nickel-containing wastewater recovery and treatment device according to claim 8, characterized in that: Liquid level sensors are installed at the top of both unit cavities, liquid inlet valves are installed at the inlet ends of both liquid inlet pipes, and liquid outlet valves are installed at the outlet ends of both liquid outlet pipes.

10. The nickel-containing wastewater recovery and treatment device according to claim 9, characterized in that: The air pump has two input terminals, each connected to a switch valve. One input terminal is connected to the liquid inlet chamber of the two unit chambers, and the other is connected to the outside.

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