A device for recovering metals from electroplating wastewater

Abstract

The application provides a metal recovery device in electroplating wastewater, and relates to the technical field of electroplating wastewater treatment.The metal recovery device comprises a recovery tank, at least one storage cylinder assembly and two barrier agitation structures.The recovery tank is respectively provided with an inlet end and an outlet end on both sides, and a recovery discharge part is arranged at the center of the bottom wall.Two symmetrical material guiding slopes are arranged on the inner bottom wall.The barrier agitation structures are slidably arranged on the upper frame body, and are driven by an agitation driving assembly to move synchronously and reversely.The barrier agitation structures trigger flocculating agent feeding and agitate waste liquid synchronously when moving below the storage cylinder assembly.The bottom of the barrier agitation structures contacts with the material guiding slopes to form a barrier when moving to both ends of the recovery tank.The metal recovery device realizes linkage of intermittent flocculating agent feeding and waste liquid agitation through reciprocating movement of the barrier agitation structures, and automatically blocks metal precipitates when discharging liquid, so that the metal recovery rate and the precipitate collection efficiency are effectively improved, and the structure is compact and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of electroplating wastewater treatment technology, and in particular to a metal recovery device for electroplating wastewater. Background Technology

[0002] Electroplating is a crucial part of the manufacturing industry, widely used in automobiles, electronics, aerospace, and everyday hardware. The electroplating process generates large amounts of wastewater containing heavy metal ions such as nickel, copper, chromium, and zinc. Direct discharge of this wastewater not only severely pollutes the environment but also wastes valuable metal resources. Therefore, recycling the metals from electroplating wastewater is both an environmental requirement and an important pathway for resource recycling.

[0003] Currently, most common metal recovery devices for electroplating wastewater employ chemical precipitation, which involves adding flocculants to the wastewater to cause metal ions to form hydroxides or other insoluble precipitates. Solid-liquid separation is then achieved through methods such as settling, filtration, or centrifugation. Existing devices typically include a reaction tank, a stirrer, a flocculant dosing system, and a sedimentation separation zone. During operation, the stirrer mixes the flocculant with the wastewater; after the reaction, stirring is stopped, and the wastewater is allowed to settle to the bottom. The supernatant is discharged, and finally, the precipitate is discharged from the bottom for recovery.

[0004] However, existing metal recovery devices have the following drawbacks in practical applications: First, the flocculant is mostly added continuously and quantitatively or manually intermittently, which is difficult to synchronize with the actual mixing needs of wastewater, easily leading to waste of reagents or incomplete reaction; at the same time, the stirring and dosing actions are independent of each other and lack a linkage mechanism, resulting in low flocculation efficiency. Second, when discharging the supernatant, the settled metal precipitates at the bottom are easily disturbed by the water flow, and some fine precipitates will flow out from the outlet with the supernatant, causing metal loss and a decrease in recovery rate; even with slopes or baffles, it is difficult to effectively prevent the precipitates from migrating to the outlet during the discharge process, affecting the thoroughness of solid-liquid separation. Summary of the Invention

[0005] The purpose of this invention is to provide a metal recovery device for electroplating wastewater to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A metal recovery device for electroplating wastewater includes a recovery tank, at least one storage cylinder assembly, and two barrier agitation structures. The recovery tank has an inlet and an outlet on its side walls, and a recovery discharge section is located at the center of its bottom wall. Two symmetrical feed ramps are provided on the bottom wall of the recovery tank to guide metal precipitates to the recovery discharge section. An upper frame is provided on the upper side of the recovery tank, and the storage cylinder assembly is mounted on the upper frame. The storage cylinder assembly is used to store and add flocculant into the recovery tank. The two barrier agitation structures are symmetrically arranged on the upper frame. The frame is equipped with a sliding structure that can slide along the length of the recycling tank. When wastewater passes through the barrier agitation structure, the barrier agitation structure can block metal ions in the wastewater from passing through. When the barrier agitation structure is at the end of the recycling tank, its bottom is in contact with the upper surface of the feed slope. When the barrier agitation structure is close to the storage cylinder assembly, it can act on the bottom of the storage cylinder assembly so that the storage cylinder assembly can put flocculant into the recycling tank. The upper frame is also equipped with an agitation drive assembly, which is connected to both barrier agitation structures and is used to drive the two barrier agitation structures to move synchronously in opposite directions.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions: In one alternative embodiment: two rotary drive units are further provided on the upper frame along its length direction; the barrier agitation structure includes a filter frame, a filter plate, and a rotary agitation unit; the two sides of the filter frame are slidably in contact with the inner wall of the recovery tank; an upper sliding frame is provided on the top of the filter frame and is slidably connected to the upper frame along its length direction; the upper sliding frame is connected to the agitation drive assembly; there are two rotary agitation units, which are vertically arranged on the front end face of the filter plate and rotatably connected to the filter frame at their top; the rotary agitation units are also connected to the rotary drive units located on the same side; the rotary drive units are used to drive the rotary agitation units that follow the movement of the filter frame to perform a rotational action.

[0008] In one alternative embodiment: the rotary drive unit is a rack and pinion, the rotary agitation unit includes an agitation shaft and multiple external agitation curved rods, the top of the agitation shaft is connected to the filter frame via a support base, the agitation shaft is rotatably connected to the support base, the top of the agitation shaft is provided with a gear portion that meshes with the rack and pinion; multiple external agitation curved rods are evenly distributed circumferentially on the outside of the agitation shaft, and the top of the external agitation curved rods is fixedly connected to the outer wall of the agitation shaft.

[0009] In one alternative: the bottom end of the agitator shaft is fitted with a lower sleeve, which can move vertically relative to the agitator shaft; the outer agitator curved rod can be bent and deformed, and its bottom end is fixedly connected to the outer wall of the lower sleeve; the bottom end of the lower sleeve has a top support ball, and the top support ball rolls in contact with the upper surface of the feed ramp.

[0010] In one alternative: the end of the rotary drive unit is provided with an end shaft and the end shaft is rotatably connected to the end of the upper frame. At one end of the upper frame, the two end shafts are connected by a belt drive, and a switching motor is connected to the end of one of the end shafts.

[0011] In one alternative embodiment: the agitation drive assembly includes a servo motor, a rotating rod, and two push-pull linkages. The servo motor is mounted on the upper frame, and its output end is provided with a rotating rod that is fixedly connected to the center. The two push-pull linkages are arranged opposite to each other, with one end hinged to one end of the rotating rod and the other end hinged to the agitation barrier structure.

[0012] In one alternative embodiment: a top rod is provided at the center of the top of the barrier agitation structure, and the top rod points to the bottom of the storage cylinder assembly. The storage cylinder assembly includes a storage cylinder and a cover plate. The storage cylinder is fixed on the upper frame and has a material injection channel at its bottom. The cover plate is located below the material injection channel and can block its port. An extension rod shaft is fixedly connected to one end of the cover plate and is rotatably connected to the upper frame through a torsion spring bearing seat. A lateral radial rod is provided at the other end of the cover plate and is opposite to the top rod.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects: This invention achieves intermittent automatic flocculant dosing and waste liquid agitation through the linkage control of two synchronously reversible barrier agitation structures. These structures trigger flocculant dosing when they reach the bottom of the storage tank assembly. This not only adjusts the dosing interval and agitation amplitude according to the movement frequency of the barrier agitation structures, avoiding reagent waste, but also significantly improves the mixing uniformity and reaction efficiency of the flocculant and metal ions in the waste liquid. When solid-liquid separation is required, the two barrier agitation structures move to opposite ends of the recovery tank, their bottoms making close contact with the upper surface of the feed inlet slope, forming a physical barrier. During the discharge of the upper clear liquid, this structure effectively prevents metal precipitates from flowing along the feed inlet slope towards the outlet, significantly reducing metal loss and improving metal recovery rate and the thoroughness of solid-liquid separation. The coordinated design of the feeding ramp and the recycling discharge section allows the metal precipitate to automatically converge to the center of the bottom of the recycling tank during the settling process, facilitating centralized collection. At the same time, the blocking and stirring structure can be removed after the liquid is drained, allowing the precipitate to be smoothly discharged from the recycling discharge section. The overall operation is simple, the structure is compact, and the degree of automation is high, making it suitable for large-scale metal resource recovery from electroplating wastewater. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the metal recovery device in electroplating wastewater from one perspective in this invention.

[0016] Figure 2 This is a schematic diagram of the metal recovery device in electroplating wastewater from another perspective in this invention.

[0017] Figure 3 This is a schematic diagram of the recycling tank structure in this invention.

[0018] Figure 4 This is a schematic diagram of the upper frame and the barrier stirring installation structure in this invention.

[0019] Figure 5 This is a schematic diagram of the agitation drive component in the present invention.

[0020] Figure 6 This is a schematic diagram of the barrier stirring structure in this invention.

[0021] Figure 7 This is a schematic diagram of the storage cylinder assembly in this invention.

[0022] Reference numerals in the attached drawings: 100, 110, 120, 130, 200, 210, 220, 230, 240, 250, 260, 260, 300, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, 600, 700, 710, 720, 800, 810, 820, 830, 900, 900, 900, 100, 100, 110, 120, 130, 100, 200, 210, 220, 230, 240, 250, 260, 20 ... Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0024] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0025] In one embodiment, such as Figures 1-4 As shown, a metal recovery device for electroplating wastewater includes a recovery tank 100, at least one storage cylinder assembly 200, and two barrier agitation structures 400. The recovery tank 100 has an inlet end 110 and an outlet end 120 on its two side walls, and a recovery discharge section 130 is located at the center of the bottom wall. Two symmetrical feed ramps 600 are provided on the inner bottom wall of the recovery tank 100 to guide metal precipitates to the recovery discharge section 130. An upper frame 300 is provided on the upper side of the recovery tank 100, and the storage cylinder assembly 200 is mounted on the upper frame 300. The storage cylinder assembly 200 is used to store and add flocculant into the recovery tank 100. The two barrier agitation structures 400... The structure is mounted on the upper frame 300 and can slide along the length of the recovery tank 100. When wastewater passes through the barrier agitation structure 400, the barrier agitation structure 400 can block metal ions in the wastewater from passing through. When the barrier agitation structure 400 is at the end of the recovery tank 100, its bottom is in contact with the upper surface of the feeding slope 600. When the barrier agitation structure 400 is close to the storage cylinder assembly 200, it can act on the bottom of the storage cylinder assembly 200 so that the storage cylinder assembly 200 can put flocculant into the recovery tank 100. The upper frame 300 is also equipped with an agitation drive assembly 800, which is connected to both barrier agitation structures 400 and is used to drive the two barrier agitation structures 400 to move synchronously in opposite directions.

[0026] In this embodiment of the invention, the electroplating waste liquid, after electrolysis, forms an electroplating solution that enters the recovery tank 100 through the inlet end 110. When flocculant is added, the stirring drive assembly 800 drives two blocking stirring structures 400 to reciprocate along the length of the recovery tank 100. The two blocking stirring structures 400 move synchronously and in opposite directions, with the bottom of the blocking stirring structures 400 inside the recovery tank 100. Since the waste liquid can pass through the blocking stirring structures 400, the moving blocking stirring structures 400 can agitate the waste liquid. When the blocking stirring structures 400 approach the storage cylinder assembly 200, the blocking stirring structures 400 act on the bottom of the storage cylinder assembly 200, causing it to add flocculant into the recovery tank 100. Thus, the flocculant is intermittently added through the storage cylinder assembly 200, and the addition interval and the agitation of the electroplating solution can be adjusted according to the frequency of the reciprocating movement of the blocking stirring structures 400. The flocculant reacts with the metal in the electroplating solution to form a metal precipitate. When the waste liquid is left to stand, the metal precipitate gradually sinks to the bottom of the recovery tank 100. Guided by the surfaces of the two feed ramps 600, the metal precipitate gathers at the bottom of the recovery tank 100. When separating the metal precipitate and the supernatant, the two barrier agitation structures 400 are located at both ends of the recovery tank 100, and their bottoms are in contact with the upper surface of the feed ramps 600, which can prevent the metal precipitate from flowing from the bottom of the barrier agitation structure 400 to the outlet end 120. When the outlet end 120 is opened, the electroplating solution flows out from the outlet end 120. Because the metal precipitate is located in the center of the bottom of the recovery tank 100 and is blocked by the feed ramps 600 and the barrier agitation structure 400, it remains at the bottom of the recovery tank 100. After the supernatant is completely discharged, the metal precipitate can be discharged by opening the outlet end 120 to achieve metal recovery.

[0027] In one embodiment, such as Figures 1-6As shown, the upper frame 300 is also provided with two rotary drive units 700 along its length. The blocking and agitating structure 400 includes a filter frame 410, a filter plate 430, and a rotary agitating unit. The two sides of the filter frame 410 are slidably in contact with the inner wall of the recovery tank 100. The top of the filter frame 410 is provided with an upper sliding frame 420, which is slidably connected to the upper frame 300 along its length. The upper sliding frame 420 is connected to the agitation drive assembly 800. There are two rotary agitating units, which are vertically arranged on the front end face of the filter plate 430 and rotatably connected to the filter frame 410 at their top. The rotary agitating units are also connected to the rotary drive units 700 located on the same side. The rotary drive unit 700 is used to drive the rotary agitator unit that moves with the filter frame 410 to rotate. In this embodiment of the invention, the agitator drive assembly 800 drives the upper sliding frame 420 so that the entire barrier agitator structure 400 reciprocates along the upper frame 300. During the movement, the filter plate 430 can effectively agitate the electroplating liquid in the recovery tank 100 by means of its own water filtration characteristics and the gap between its bottom and the upper surface of the feed slope 600, so that it can fully combine with the flocculant. At the same time, under the action of the rotary drive unit 700, the rotary agitator unit that moves with the filter frame 410 rotates. The rotary agitator unit can form a vortex field on the front side of the filter plate 430, which can effectively improve the mixing effect.

[0028] In one embodiment, such as Figures 1-6 As shown, the rotary drive unit 700 is a rack and pinion, and the rotary agitation unit includes an agitation shaft 440 and multiple external agitation curved rods 460. The top of the agitation shaft 440 is connected to the filter frame 410 via a support base 490, and the agitation shaft 440 is rotatably connected to the support base 490. A gear portion 480 is provided on the top of the agitation shaft 440, and the gear portion 480 meshes with the rack. The multiple external agitation curved rods 460 are evenly distributed circumferentially. Outside the agitator shaft 440, the top of the outer agitator curved rod 460 is fixedly connected to the outer wall of the agitator shaft 440. In this embodiment of the invention, when the agitator shaft 440 moves with the filter frame 410, due to the meshing of the gear part 480 and the rotary drive part 700, the movement of the gear part 480 serves as power to drive the agitator shaft 440 to rotate. Multiple outer agitator curved rods 460 follow the rotation of the agitator shaft 440 to agitate the electroplating solution in a vortex manner.

[0029] In one embodiment, such as Figures 1-6As shown, the bottom end of the agitating shaft 440 is fitted with a lower sleeve 450, which can move vertically relative to the agitating shaft 440. The outer agitating curved rod 460 is bendable and deformable, and its bottom end is fixedly connected to the outer wall of the lower sleeve 450. The bottom end of the lower sleeve 450 has a top support ball 470, which rolls in contact with the upper surface of the feed ramp 600. In this embodiment of the invention, since the outer agitating curved rod 460 has the ability to bend and deform and the lower sleeve 450 moves vertically relative to the agitating shaft 440, during the movement of the rotating agitating unit, the top support ball 470 moves along the upper surface of the feed ramp 600, the lower sleeve 450 moves relative to the agitating shaft 440, and the outer agitating curved rod 460 deforms, so that the state of the rotating agitating unit agitating the electroplating solution is always changing.

[0030] In one embodiment, such as Figures 1-6 As shown, the agitation drive assembly 800 includes a servo motor 810, a rotating rod 820, and two push-pull connecting rods 830. The servo motor 810 is mounted on the upper frame 300, and its output end is centrally connected to the rotating rod 820. The two push-pull connecting rods 830 are arranged opposite each other, with one end hinged to one end of the rotating rod 820 and the other end hinged to the agitation barrier structure 400. In this embodiment of the invention, the servo motor 810 operates, driving the rotating rod 820 to rotate alternately in both directions. The rotating rod 820 acts on the two agitation barrier structures 400 respectively through the two push-pull connecting rods 830. The two agitation barrier structures 400 move synchronously and in opposite directions, thereby agitating the electroplating solution in the recovery tank 100.

[0031] In one embodiment, such as Figures 1-6 As shown, the end of the rotary drive unit 700 is provided with an end shaft portion 710, and the end shaft portion 710 is rotatably connected to the end of the upper frame 300. At one end of the upper frame 300, the two end shaft portions 710 are connected by a belt drive member 720, and a switching motor is connected to the end of one of the end shaft portions 710. In this embodiment of the invention, the switching motor drives the end shaft portion 710 connected to it to rotate. By utilizing the rotation drive unit 700 and the belt drive member 720, the two rotary drive units 700 can rotate around the end shaft. The rotation of the center of the 710 unit allows the rotation drive unit 700 to be disengaged from and connected to the rotation agitation unit. When the rotation drive unit 700 is in a vertical state, it can be connected to the blocking agitation structure 400 (i.e., the rack and gear unit 480 are in a meshing state). When the rotation drive unit 700 is in an inclined or horizontal state, it disengages from the blocking agitation structure 400 (i.e., the rack and gear unit 480 disengages), thereby allowing the blocking agitation structure 400 to switch the rotation state of the rotation agitation unit during movement.

[0032] In one embodiment, such as Figures 1-7As shown, a top rod 900 is provided at the top center of the blocking and stirring structure 400, and the top rod 900 points to the bottom of the storage cylinder assembly 200. The storage cylinder assembly 200 includes a storage cylinder 210 and a cover plate 230. The storage cylinder 210 is fixed on the upper frame 300 and has a material injection channel 220 at its bottom. The cover plate 230 is located below the material injection channel 220 and can block its port. One end of the cover plate 230 is fixedly connected to an extension rod shaft 240, and the extension rod shaft 240 is rotatably connected to the upper frame 300 through a torsion spring bearing seat 250. The other end of the cover plate 230 is provided with a lateral radial rod 260, and the lateral radial rod 260 is opposite to the top rod 900. In this embodiment of the invention, in the initial state, under the torque of the lower sleeve 450, the cover plate The part 230 is directly opposite the injection channel 220 and blocks the injection channel 220, which can prevent the flocculant inside the storage cylinder 210 from falling down on its own. When the blocking and stirring structure 400 approaches the storage cylinder 210, the end of the top rod 900 abuts against the lateral radial rod 260 and acts on the lateral radial rod 260, which can cause the cover part 230 to rotate around the torsion spring bearing seat 250. As a result, the cover part 230 and the storage cylinder 210 are gradually misaligned, and the flocculant in the storage cylinder 210 gradually falls from the injection channel 220. After the blocking and stirring structure 400 moves away from the storage cylinder 210, the top rod 900 gradually moves away from the lateral radial rod 260 and releases the force applied to the lateral radial rod 260. Under the torsion of the torsion spring bearing seat 250, the cover part 230 rotates back to the initial position and prevents the flocculant from falling down.

[0033] The above embodiment provides a metal recovery device for electroplating wastewater, the working principle of which is as follows: Electroplating wastewater, after electrolytic treatment, enters the interior of the recovery tank 100 through the inlet end 110. At this time, the agitation drive assembly 800 is activated, and its servo motor 810 drives the rotating rod 820 to rotate alternately in both directions. The rotating rod 820 pulls two blocking agitation structures 400 through two push-pull connecting rods 830. The two blocking agitation structures 400 move synchronously and in opposite directions along the length of the recovery tank 100 on the upper frame 300.

[0034] During the movement: Agitation and Mixing: The filter plate 430 at the bottom of the barrier agitation structure 400 and the rotating agitator unit are immersed in the waste liquid. The waste liquid can pass through the filter plate 430, so the moving barrier agitation structure 400 can effectively agitate the waste liquid. At the same time, since the gear part 480 meshes with the rack of the fixed rotating drive part 700, the moving gear part 480 drives the agitation shaft 440 to rotate, which in turn drives the outer agitation curved rod 460 to rotate, forming a vortex field in front of the filter plate 430, significantly improving the mixing effect of flocculant and waste liquid. The top support ball bearings 470 roll along the surface of the feed ramp 600, causing the lower sleeve 450 to move up and down relative to the agitation shaft 440, and the outer agitation curved rod 460 to deform accordingly, realizing dynamic agitation.

[0035] Intermittent flocculant addition: When the blocking and agitating structure 400 moves close to the storage cylinder assembly 200, its top rod 900 contacts the radial rod 260 on the cover plate 230, pushing the cover plate 230 to rotate around the torsion spring bearing seat 250, thereby opening the injection channel 220, and the flocculant in the storage cylinder 210 falls into the recovery tank 100. When the blocking and agitating structure 400 moves away, the top rod 900 disengages, and under the torque of the torsion spring bearing seat 250, the cover plate 230 resets and seals the injection channel 220. With the reciprocating movement of the blocking and agitating structure 400, flocculant is intermittently and quantitatively added to the tank.

[0036] The flocculant reacts fully with the metal ions in the waste liquid to form an insoluble metal precipitate. After agitation is stopped, the waste liquid is allowed to stand, and the precipitate settles under gravity.

[0037] After the sediment settles to the bottom of the recovery tank 100, it automatically converges to the central recovery discharge section 130 under the guidance of two symmetrically arranged feeding ramps 600.

[0038] At this point, the agitation drive assembly 800 moves the two barrier agitation structures 400 to opposite ends of the recovery tank 100. In this position, the bottom of the barrier agitation structure 400, with the support ball 470 at the bottom of the sleeve 450, is in close contact with the upper surface of the feed ramp 600, forming a barrier. Then, the outlet end 120 is opened, and the purified liquid from the upper layer is preferentially discharged from the outlet end 120, while the metal precipitate is blocked in the bottom area between the two barrier agitation structures 400 and cannot flow to the outlet end 120.

[0039] After the upper liquid is drained, the metal precipitate remains completely trapped at the bottom center of the recovery tank 100. Finally, by opening the recovery discharge section 130, the high-concentration metal precipitate can be collected, achieving effective metal recovery.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the 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.

Claims

1. A metal recovery device for electroplating wastewater, comprising a recovery tank, at least one storage cylinder assembly, and two barrier agitation structures, characterized in that, The recycling tank has an inlet end and an outlet end on its two side walls, and a recycling outlet is located at the center of the bottom wall of the recycling tank. The bottom wall inside the recycling tank is equipped with two symmetrical feeding ramps, which are used to guide the metal precipitate to the recycling discharge section. The upper side of the recycling tank is provided with an upper frame and the storage cylinder assembly is located on the upper frame. The storage cylinder assembly is used to store and add flocculant into the recycling tank. Two barrier agitation structures are symmetrically arranged on the upper frame and can slide along the length of the recycling tank. When wastewater passes through the barrier agitation structure, the barrier agitation structure can block metal ions in the wastewater from passing through. When the barrier agitation structure is at the end of the recycling tank, its bottom is in contact with the upper surface of the feed ramp; When the blocking and agitating structure approaches the storage cylinder assembly, it can act on the bottom of the storage cylinder assembly, so that the storage cylinder assembly can release flocculant into the recovery tank. The upper frame is also equipped with a stirring drive assembly, which is connected to both barrier stirring structures and is used to drive the two barrier stirring structures to move synchronously in opposite directions.

2. The metal recovery device for electroplating wastewater according to claim 1, characterized in that, The upper frame is also provided with two rotating drive units along its length direction, and the blocking and agitating structure includes a filter frame, a filter plate and a rotating agitating unit; The two sides of the filter frame can slide in contact with the inner wall of the recycling tank. The top of the filter frame is provided with an upper sliding frame and the upper sliding frame can slide along its length. The upper sliding frame is connected to the stirring drive assembly. There are two rotating agitation units, which are vertically arranged on the front end face of the filter plate and rotatably connected to the filter frame at the top. The rotating agitation unit is also connected to a rotating drive unit located on the same side. The rotating drive unit is used to drive the rotating agitation unit that moves with the filter frame to perform a rotating action.

3. The metal recovery device for electroplating wastewater according to claim 2, characterized in that, The rotary drive unit is a rack, and the rotary agitation unit includes an agitation shaft and multiple external agitation curved rods. The top of the agitation shaft is connected to the filter frame via a support base, and the agitation shaft is rotatably connected to the support base. The top of the agitation shaft is provided with a gear part, and the gear part meshes with the rack. Multiple external agitator curved rods are evenly distributed circumferentially on the outside of the agitator shaft, and the top of the external agitator curved rods is fixedly connected to the outer wall of the agitator shaft.

4. The metal recovery device for electroplating wastewater according to claim 3, characterized in that, The bottom end of the agitator shaft is fitted with a lower sleeve, which can move vertically relative to the agitator shaft. The outer agitator curved rod can be bent and deformed, and its bottom end is fixedly connected to the outer wall of the lower sleeve. The bottom end of the lower sleeve has a top support ball, and the top support ball rolls in contact with the upper surface of the feeding slope.

5. The metal recovery device for electroplating wastewater according to claim 2, characterized in that, The end of the rotary drive unit is provided with an end shaft and the end shaft is rotatably connected to the end of the upper frame. At one end of the upper frame, the two end shafts are connected by a belt drive component, and a switching motor is connected to the end of one of the end shafts.

6. The metal recovery device for electroplating wastewater according to claim 1, characterized in that, The agitation drive assembly includes a servo motor, a rotating rod, and two push-pull linkages. The servo motor is mounted on the upper frame, and its output end is provided with a rotating rod that is fixedly connected to the center. The two push-pull linkages are arranged opposite each other, with one end hinged to one end of the rotating rod and the other end hinged to the agitation barrier structure.

7. The metal recovery device for electroplating wastewater according to claim 1, characterized in that, The top center of the barrier agitation structure is provided with a top rod, and the top rod points to the bottom of the storage cylinder assembly; The storage cylinder assembly includes a storage cylinder and a cover plate. The storage cylinder is fixed on the upper frame and has a material injection channel at its bottom. The cover plate is located below the material injection channel and can block its port. One end of the cover plate is fixedly connected to an extension rod shaft, and the extension rod shaft is rotatably connected to the upper frame through a torsion spring bearing seat. The other end of the cover plate is provided with a lateral radial rod, and the lateral radial rod is opposite to the top rod.

Images