A heavy metal extraction and recovery device for electroplating sludge treatment

Abstract

This invention provides a heavy metal extraction and recovery device for electroplating sludge treatment, relating to the field of heavy metal sludge treatment. The device includes a support frame, a hopper, a feed frame, a discharge frame, a trapezoidal support plate, a stirring mechanism, and a water suction mechanism. The hopper is movably connected to the support frame and can be flipped, with filter holes at the bottom and sides. The feed frame and discharge frame are located on opposite sides above the hopper and are connected to it. The trapezoidal support plate is positioned between the feed frame and the discharge frame. The stirring mechanism stirs the electroplating sludge within the hopper. The water suction mechanism includes a push-pull assembly and a water-absorbing filter assembly. The push-pull assembly drives the water-absorbing filter assembly to move inside and outside the hopper, absorbing some of the water from the electroplating sludge and discharging it to the outside. Through the coordinated operation of its components, this device improves the water extraction efficiency from the electroplating sludge, thereby reducing its water content.

Description

Technical Field

[0001] This invention relates to the field of heavy metal sludge treatment, and more particularly to a heavy metal extraction and recovery device for electroplating sludge treatment. Background Technology

[0002] The electroplating industry typically generates large amounts of electroplating wastewater, which is often treated using chemical precipitation. Adding various chemical reagents and flocculants to the wastewater produces a large amount of electroplating sludge. This sludge contains high concentrations of heavy metals, necessitating the extraction and recovery of these heavy metals.

[0003] In the initial transportation stage of recycling, electroplating sludge is typically conveyed from a screw conveyor belt to a regular conveyor belt. To reduce the sludge's moisture content, a hopper is usually installed between the two conveyor belts. The hopper is equipped with a screen or filter holes at the bottom to drain the liquid portion of the electroplating sludge transported to the hopper. Subsequently, the sludge is poured into the next section of the conveyor belt by tipping the hopper. However, this design is not very effective at removing liquid from the top or interior of the sludge, resulting in a difficulty in significantly reducing the overall moisture content of the sludge and affecting subsequent processing efficiency.

[0004] To address the aforementioned problems, Chinese patent application CN202410052062.0 discloses a device for extracting and recovering heavy metals from electroplating sludge. This device includes a processing unit and a conveying unit. The conveying unit is equipped with a filtration assembly positioned between two conveyor belts and includes a support frame, a hopper, a feed frame, a discharge frame, and a stirring mechanism. The hopper is mounted on the support frame via a movable connection and can rotate relative to the support. The top of the hopper has an open hopper compartment, and its bottom and sides have multiple filtration holes for discharging liquid from the sludge. The feed frame and discharge frame are located on opposite sides above the hopper and communicate with the hopper compartment. The stirring mechanism is located inside the hopper compartment and is used to stir the electroplating sludge to enhance the dewatering effect.

[0005] However, in practical use, it was found that although the agitation mechanism of the equipment could stir the sludge in the hopper, its dewatering effect was limited. Specifically, when the agitation mechanism was running, it mainly acted on the sludge at the edge of the hopper, causing the electroplating sludge at the edge to change position. The electroplating sludge closer to the center of the hopper, due to its positional characteristics, was often isolated by the surrounding sludge at the edge, making it difficult for the central sludge to fully contact the inner wall of the hopper and the filter holes, thus hindering effective water extraction. Even adding an additional agitator in the center of the hopper only changed the position of the electroplating sludge, failing to solve the problem of water extraction from the central sludge, ultimately resulting in a still high overall moisture content of the sludge. This deficiency seriously affected the efficiency and economics of subsequent heavy metal extraction and recovery. In summary, the main drawback of the existing technology is that although the stirring mechanism can stir the sludge to a certain extent, the uneven distribution of the stirring effect limits the dewatering effect of the sludge in the middle and makes it difficult to effectively reduce the moisture content of the sludge. This has become a key technical bottleneck restricting the efficiency of heavy metal extraction and recovery from electroplating sludge. Summary of the Invention

[0006] This invention discloses a heavy metal extraction and recovery device for electroplating sludge treatment, in order to solve the technical problem that the water content of electroplating sludge in the hopper is still too high in related technologies.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A heavy metal extraction and recovery device for electroplating sludge treatment includes: a support frame installed between two conveyor belts; a hopper movably connected to the support frame and capable of rotating relative to the support frame, with filter holes provided at the bottom and sides of the hopper; a feed frame, a discharge frame, and a trapezoidal support plate, wherein the feed frame and the discharge frame are located on the upper sides of the hopper and are both connected to the hopper, and the trapezoidal support plate is installed between the feed frame and the discharge frame; a stirring mechanism installed on the support frame and used to stir the electroplating sludge in the hopper; and a water suction mechanism including a push-pull assembly and a water-absorbing filter assembly, wherein the water-absorbing filter assembly is movably disposed between the support frame and the hopper, and the push-pull assembly is installed on the support frame. When electroplating sludge is introduced into the hopper, the push-pull assembly is used to drive the water-absorbing filter assembly into or out of the electroplating sludge, and the water-absorbing filter assembly is used to absorb some of the water in the electroplating sludge and discharge it to the outside.

[0009] Optionally, a first connecting rod is provided laterally on the side wall of the trapezoidal support plate away from the hopper, and a hollow inner tube extending vertically into the hopper is connected to the first connecting rod; a hollow horizontal tube is provided laterally at the bottom of the hollow inner tube, and the hollow horizontal tube is connected to the hollow inner tube; the water-absorbing filter mud assembly is movably disposed between the hollow horizontal tube and the hollow inner tube, and the water-absorbing filter mud assembly can partially extend out from the hollow horizontal tube and enter the hopper.

[0010] Optionally, the push-pull assembly includes a cylinder, a second connecting rod, and a connecting part. The cylinder is located inside the trapezoidal support plate, and the piston rod of the cylinder extends and retracts vertically in the direction away from the hopper. The second connecting rod is horizontally located on the piston rod of the cylinder, and the connecting part is located at the end of the second connecting rod away from the cylinder and is connected to a portion of the water-absorbing filter assembly. When the piston rod of the cylinder shortens or extends, it drives the water-absorbing filter assembly into or out of the hopper.

[0011] Optionally, the water-absorbing filter assembly includes a negative pressure pump, a drain hose, a water-absorbing hose, a movable rigid pipe, an adapter, and an adsorption rigid pipe. The negative pressure pump is mounted on the trapezoidal support plate facing away from the hopper. The drain hose is connected to the pump outlet end of the negative pressure pump, with one end extending away from the negative pressure pump to the outside of the hopper. The water-absorbing hose is connected to the pump inlet end of the negative pressure pump. The movable rigid pipe is vertically slidably inserted into the hollow inner pipe, and the connecting part is a connecting ring. The connecting ring is fixedly sleeved on the outer peripheral wall of the movable rigid pipe near the top, and the water-absorbing hose is away from the negative pressure pump. One end of the tube is connected to the top opening of the movable rigid tube; the adapter is located at the bottom end of the movable rigid tube in the hollow inner tube, and the adsorption rigid tube is connected to the movable rigid tube through the adapter. The inner diameter of the adsorption rigid tube is smaller than the inner diameter of the movable rigid tube. An extension hole is opened in the center of the lower tube wall of the hollow horizontal tube, and the adsorption rigid tube can be vertically extended into the hopper through the extension hole. The tube wall of the adsorption rigid tube is provided with multiple adsorption holes, and the surface of the adsorption holes is covered with a non-woven fabric layer so that when the adsorption holes are subjected to negative pressure suction under the action of the negative pressure pump, water is drawn in and electroplating sludge is blocked from entering the adsorption rigid tube.

[0012] Optionally, the adapter is connected to an adsorption hose on each side of the adsorption hard tube. Inside the hollow horizontal tube, a curved guide tube is provided on each side of the adsorption hard tube. One end of the curved guide tube is vertically downward. The curved guide tube is used for inserting the adsorption hose, and the adsorption hose can extend downward into the hopper at a position away from the adsorption hard tube under the guidance of the curved guide tube. The adsorption hose is also provided with adsorption holes, and the surface of the adsorption holes is also covered with a non-woven fabric layer.

[0013] Optionally, the curved guide tube includes a first arc-shaped tube, a horizontal tube, and a second arc-shaped tube. The first arc-shaped tube gradually transitions from a vertical extension to a horizontal extension towards the side away from the adsorption hard tube. The horizontal tube is horizontally connected to the end of the first arc-shaped tube away from the adsorption hard tube. The second arc-shaped tube gradually transitions from a horizontal extension to a vertical extension and is connected to the end of the horizontal tube away from the first arc-shaped tube. The lower end of the second arc-shaped tube is flush with the lower wall of the hollow horizontal tube.

[0014] Optionally, the stirring mechanism includes a motor, a first bevel gear, a second bevel gear, a hollow straight tube, a crossbar, and an inclined stirring rod. The motor is mounted on the concave surface of the trapezoidal support plate away from the hopper. The first bevel gear is coaxially mounted on the output shaft of the motor. The hollow straight tube is vertically rotatably mounted on the bottom surface of the trapezoidal support plate and extends vertically downwards into the hopper. The second bevel gear is coaxially mounted on the outer peripheral wall of the hollow straight tube, and the first and second bevel gears mesh. Multiple crossbars are horizontally arranged on the tube wall of the hollow straight tube near the inside of the hopper. The inclined stirring rod is located at the end of the crossbar away from the hollow straight tube, and the extension direction of the inclined stirring rod is consistent with the inclination angle of the side wall of the hopper. The hollow inner tube vertically penetrates the hollow straight tube and extends vertically from above the trapezoidal support plate into the hopper along the interior of the hollow straight tube, with a gap between the hollow inner tube and the hollow straight tube.

[0015] Optionally, the adsorption hose is fitted with an orientation mechanism. The orientation mechanism can bend synchronously with the adsorption hose, and the orientation mechanism can drive the section of the adsorption hose outside the curved guide tube to always remain in a straight state, so that the part of the adsorption hose outside the upper end of the curved guide tube is not easily bent when subjected to the downward pressure of the moving rigid tube, and at the same time, it makes it less likely that the part of the adsorption hose outside the lower end of the curved guide tube will bend and touch the stirring mechanism when the hopper is overturned.

[0016] Optionally, the orientation mechanism includes hollow tube sections, lugs, a rotating rod, and a torsion spring. Multiple hollow tube sections are axially connected, forming a channel for the adsorption hose to pass through, and the adsorption hose is adhered within the multiple hollow tube sections. The lugs are located at the center of both sides of the openings at adjacent hollow tube sections. The lugs of two adjacent hollow tube sections are staggered and fitted together, and each of the two fitted lugs has a rotating hole. The rotating rod is rotatably inserted into the two rotating holes, and both ends of the rotating rod have anti-detachment parts. The edges of the openings adjacent to adjacent hollow tube sections are inclined arc surfaces, and two adjacent inclined arc surfaces form a rotation gap. Along the radial direction of the hollow tube section, the rotation gap extends from the edge closest to the lug. The width gradually increases from the ear to the side away from the lug; the torsion spring is sleeved on the rotating rod, and the middle position of the torsion spring is connected to the rod wall of the rotating rod, and the two ends are respectively connected to a lug. The torsion spring always tends to keep two adjacent hollow tube sections on the same vertical line, and the rotation surface when the adjacent lugs rotate relative to each other is perpendicular to the rotation surface when the hopper flips; a sealing membrane is provided between the two hollow tube sections and at the rotation gap. The membrane is used to cover the rotation gap to prevent external sludge from entering the hollow tube section through the rotation gap; an alignment hole is provided on the hollow tube section corresponding to the adsorption hole on the adsorption hose, and the surface of the alignment hole is also covered with a non-woven fabric layer.

[0017] The technical solution adopted in this invention can achieve the following beneficial effects:

[0018] This invention provides a heavy metal extraction and recovery device for electroplating sludge treatment. Through several innovative designs, it achieves efficient, stable, and convenient sludge treatment and water extraction from electroplating sludge. Its water-absorbing filter assembly adopts a combined design of hard and soft adsorption tubes, along with adsorption pores covered by non-woven fabric, effectively improving the adsorption efficiency and filtration effect of water in electroplating sludge. This also prevents sludge particles from clogging the pipes, enhancing the extraction of water from the electroplating sludge. The curved guide tube, with its segmented design of a first arc-shaped tube, a horizontal tube, and a second arc-shaped tube, not only ensures smooth guidance of the adsorption hose's operating path but also improves the adaptability and operational stability of the pipeline structure. The stirring mechanism, through a combination of a motor, bevel gears, a crossbar, and an inclined stirring rod, achieves uniform stirring of the sludge and the treatment liquid. The isolation design between the hollow straight tube and the hollow inner tube prevents interference between the stirring process and the adsorption operation. The orientation mechanism, through a linkage structure of multiple hollow tube sections, lugs, rotating rods, and torsion springs, ensures that the adsorption hose remains vertical outside the curved guide tube, preventing the hose from bending or touching the stirring mechanism due to force or flipping. Furthermore, the sealing membrane prevents external sludge from entering the hollow tube section, further enhancing the equipment's reliability and durability. In summary, this invention not only solves the problem of high water content in electroplating sludge in recycling equipment, but also significantly improves the water extraction efficiency and equipment operation stability, thus possessing broad industrial application value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0021] Figure 2 This is a partial cross-sectional view of an embodiment of this application. Figure 1 ;

[0022] Figure 3 This is a partial cross-sectional view of an embodiment of this application. Figure 2 ;

[0023] Figure 4 This is a structural schematic diagram of an embodiment of the present application, used to demonstrate a trapezoidal support plate and components disposed on the trapezoidal support plate;

[0024] Figure 5 yes Figure 4 A partial sectional view from another perspective;

[0025] Figure 6 This is a partial structural cross-sectional view of an embodiment of the present application, used to illustrate the adsorption rigid tube;

[0026] Figure 7 This is a partial cross-sectional view of an embodiment of this application, showing a trapezoidal support plate and components disposed on the trapezoidal support plate. Figure 1 ;

[0027] Figure 8 This is a partial cross-sectional view of an embodiment of this application, showing a trapezoidal support plate and components disposed on the trapezoidal support plate. Figure 2 ;

[0028] Figure 9 This is a partial schematic diagram of an embodiment of the present application for demonstrating the orientation mechanism. Figure 1 ;

[0029] Figure 10 This is a partial schematic diagram of an embodiment of the present application for demonstrating the orientation mechanism. Figure 2 ;

[0030] Figure 11 yes Figure 10 Enlarged view of part A in the image;

[0031] Figure 12 This is a partial cross-sectional view of an embodiment of this application, used to illustrate the connection relationship between the hollow tube section and the adsorption hose.

[0032] In the picture:

[0033] 1. Support frame; 2. Hopper; 21. Feed frame; 22. Discharge frame; 23. Trapezoidal support plate; 231. First connecting rod; 232. Hollow inner tube; 233. Hollow horizontal tube; 233a. Extrusion hole; 3. Stirring mechanism; 31. Motor; 32. First bevel gear; 33. Second bevel gear; 34. Hollow straight tube; 35. Horizontal bar; 36. Inclined stirring rod; 4. Water suction mechanism; 5. Push-pull assembly; 51. Cylinder; 52. Second connecting rod; 53. Connecting part; 6. Water suction Filter mud assembly; 61. Negative pressure pump; 62. Drain hose; 63. Suction hose; 64. Moving rigid tube; 65. Adapter; 66. Adsorption rigid tube; 67. Adsorption hose; 7. Adsorption hole; 71. Non-woven fabric layer; 8. Curved guide tube; 81. First arc-shaped tube; 82. Horizontal tube; 83. Second arc-shaped tube; 9. Orientation mechanism; 91. Hollow tube section; 911. Rotation clearance; 912. Sealing membrane; 913. Alignment hole; 92. Lug; 93. Rotating rod; 94. Torsion spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] The following is in conjunction with the appendix Figures 1 to 12 This application provides a detailed description of a heavy metal extraction and recovery device for electroplating sludge treatment through specific embodiments and application scenarios.

[0037] A heavy metal extraction and recovery device for electroplating sludge treatment, combined with Figures 1 to 3 The system includes a frame, a hopper 2, a feed frame 21, a discharge frame 22, a trapezoidal support plate 23, a mixing mechanism 3, and a water suction mechanism 4. The support frame 1 is installed between two conveyor belts. It is worth noting that the two conveyor belts are not shown in the attached drawings. It should be understood that these conveyor belts are used to transport electroplating sludge; therefore, the existing technology for the layout of these conveyor belts will not be described further.

[0038] For example, the hopper 2 is movably connected to the support 1 and can be rotated relative to the support 1, and filter holes are provided on the bottom and sides of the hopper 2. Specifically, the two side walls of the hopper 2 are hinged to the support 1, so that it can rotate relative to the support 1 in the vertical plane.

[0039] For example, the stirring mechanism 3 is mounted on the support 1 and is used to stir the electroplating sludge in the hopper 2.

[0040] For example, the water absorption mechanism 4 includes a push-pull assembly 5 and a water absorption filter assembly 6. The water absorption filter assembly 6 is movably disposed between the support 1 and the hopper 2. The push-pull assembly 5 is installed on the support 1. When electroplating sludge is introduced into the hopper 2, the push-pull assembly 5 is used to drive the water absorption filter assembly 6 into or out of the electroplating sludge. The water absorption filter assembly 6 is used to absorb some of the water in the electroplating sludge and discharge it to the outside.

[0041] Specifically, the push-pull component 5 in the water suction mechanism 4 is mounted on the support 1. When electroplating sludge is introduced into the hopper 2, it drives the water suction filter component 6 to enter or exit the electroplating sludge, achieving dynamic permeation treatment of the sludge. The water suction filter component 6 is located between the support 1 and the hopper 2, and its position can be flexibly adjusted to ensure full contact with the electroplating sludge, thereby absorbing some of the water from the sludge and discharging it to the outside. Compared to the existing technology that only uses the stirring mechanism 3 to extract liquid from the sludge, this water suction mechanism 4 can directly penetrate into the electroplating sludge, overcoming the defect of insufficient contact between the central sludge and the filter holes due to uneven distribution caused by stirring, significantly enhancing the water extraction effect. Furthermore, the water suction filter component 6 complements the filter holes at the bottom and sides of the hopper 2 during the water suction process, making the discharge of water from the sludge more efficient and further reducing the moisture content of the electroplating sludge.

[0042] Meanwhile, the trapezoidal support plate 23 is installed between the feed frame 21 and the discharge frame 22, which can effectively support the hopper 2 and guide the flow direction of the electroplating sludge, ensuring that the sludge is evenly distributed in each area of ​​the hopper 2, thereby avoiding the problem of inconsistent dewatering effect due to uneven sludge distribution. At the same time, it can also guide the filtered electroplating sludge to flow out from the discharge frame 22 when the hopper 2 is turned over.

[0043] Overall, by adding a water suction mechanism 4 and a trapezoidal support plate 23 to the existing equipment, and by rationally arranging the structure and function of the hopper 2, filter holes and stirring mechanism 3, the dewatering efficiency of electroplating sludge has been improved, and its moisture content has been significantly reduced. This provides more economical and efficient conditions for the subsequent extraction and recovery of heavy metals, effectively overcoming the technical bottleneck of high moisture content in the existing technology that restricts the processing efficiency, and demonstrating significant technological progress.

[0044] In some implementations, such as Figures 3-5 As shown, a first connecting rod 231 is provided horizontally on the side wall of the trapezoidal support plate 23 away from the hopper 2, and a hollow inner tube 232 extending vertically into the hopper 2 is connected to the first connecting rod 231.

[0045] For example, a hollow horizontal tube 233 is provided at the bottom of the hollow inner tube 232. The hollow horizontal tube 233 is connected to the hollow inner tube 232. The water-absorbing and sludge-filtering assembly 6 is movably disposed between the hollow horizontal tube 233 and the hollow inner tube 232. The water-absorbing and sludge-filtering assembly 6 can partially extend out of the hollow horizontal tube 233 and enter the hopper 2.

[0046] Based on this, the hollow inner tube 232 provides the water-absorbing filter sludge assembly 6 with a fixed movement path, and it is connected to the hollow inner tube 232 via a horizontally arranged hollow tube 233 at the bottom, allowing the water-absorbing filter sludge assembly 6 to move flexibly between the hollow tube 233 and the hollow inner tube 232. This design enables precise positioning and dynamic adjustment of the water-absorbing filter sludge assembly 6 inside the hopper 2, allowing it to partially extend from the hollow tube 233 and penetrate deep into the electroplating sludge area inside the hopper 2, ensuring effective absorption of moisture from the sludge. Simultaneously, the connection structure between the hollow tube 233 and the hollow inner tube 232 provides stable support, ensuring the reliability and consistency of the water-absorbing filter sludge assembly 6 during water absorption operations, and avoiding uneven dehydration caused by component displacement or detachment.

[0047] In some implementations, combined with Figures 3-5 The push-pull assembly 5 includes a cylinder 51, a second connecting rod 52, and a connecting part 53. The cylinder 51 is located inside the trapezoidal support plate 23. The piston rod of the cylinder 51 extends and retracts vertically in the direction away from the hopper 2. The second connecting rod 52 is horizontally located on the piston rod of the cylinder 51. The connecting part 53 is located at the end of the second connecting rod 52 away from the cylinder 51 and is connected to the part of the water-absorbing filter mud assembly 6. When the piston rod of the cylinder 51 is shortened or extended, it drives the water-absorbing filter mud assembly 6 to enter or exit the hopper 2.

[0048] With this configuration, the piston rod of cylinder 51 can extend and retract vertically in the direction away from hopper 2, and its power output directly determines the movement state of the water-absorbing filter assembly 6. When the piston rod shortens or extends, the driving force is stably transmitted to the connecting part 53 through the second connecting rod 52 horizontally set on the piston rod, and finally acts on the water-absorbing filter assembly 6, allowing it to smoothly enter or exit the hopper 2. This design not only ensures that the movement trajectory of the water-absorbing filter assembly 6 is clear and the control is precise, but also allows the water-absorbing filter assembly 6 to adjust its position in a timely manner according to the working conditions through the flexible adjustment capability of cylinder 51, that is, the water-absorbing filter assembly 6 is inserted into the electroplating sludge only after the electroplating sludge is introduced into the hopper 2. It is worth noting that this method has several advantages: 1. If the water-absorbing filter assembly 6 is always positioned exposed inside the hopper 2, the weight of the electroplating sludge during the conveyor belt's process of guiding it into the hopper 2 may exert an impact force on the water-absorbing filter assembly 6, potentially damaging it. Therefore, by using cylinder 51 to make the water-absorbing filter assembly 6 movable, it can be inserted into the electroplating sludge only after it has been introduced into the hopper 2, thus preventing damage from the impact force of the sludge. 2. When the water-absorbing filter assembly 6 is inserted into the electroplating sludge only after it has been introduced into the hopper 2, it actively inserts itself into the sludge, allowing for more thorough contact with the sludge and improving subsequent water absorption. If the water-absorbing filter assembly 6 is already in the hopper 2 before the electroplating sludge enters the hopper 2, the presence of the water-absorbing filter assembly 6 may occupy the space where the electroplating sludge originally flowed in, thus making the contact between the water-absorbing filter assembly 6 and the electroplating sludge insufficient, thereby reducing the water absorption effect.

[0049] In some implementations, combined with Figures 3-5 The water-absorbing filter mud assembly 6 includes a negative pressure pump 61, a drain hose 62, a water-absorbing hose 63, a movable rigid pipe 64, an adapter 65, and an adsorption rigid pipe 66. For example, the negative pressure pump 61 is mounted on the trapezoidal support plate 23 facing away from the hopper 2; the drain hose 62 is connected to the pump outlet end of the negative pressure pump 61, and the end of the drain hose 62 away from the negative pressure pump 61 extends outside the hopper 2; the water-absorbing hose 63 is connected to the pump inlet end of the negative pressure pump 61.

[0050] For example, the movable rigid tube 64 is vertically slidably inserted into the hollow inner tube 232, the connecting part 53 is a connecting ring, the connecting ring is fixedly sleeved on the outer peripheral wall of the movable rigid tube 64 near the top, and the end of the water suction hose 63 away from the negative pressure pump 61 is connected to the top opening of the movable rigid tube 64.

[0051] For example, the adapter 65 is located at the bottom end of the movable hard tube 64 in the hollow inner tube 232, and the adsorption hard tube 66 is connected to the movable hard tube 64 through the adapter 65. The inner diameter of the adsorption hard tube 66 is smaller than the inner diameter of the movable hard tube 64. An extension hole 233a is opened at the center of the lower tube wall of the hollow horizontal tube 233, and the adsorption hard tube 66 can be extended vertically downward into the hopper 2 through the extension hole 233a.

[0052] For example, in combination Figure 5 , Figure 6 The wall of the adsorption tube 66 is provided with multiple adsorption holes 7, and the surface of the adsorption holes 7 is covered with a non-woven fabric layer 71. When the adsorption holes 7 are subjected to negative pressure suction under the action of the negative pressure pump 61, water is drawn in and electroplating sludge is prevented from entering the adsorption tube 66. Furthermore, the non-woven fabric layer 71 of this application is made of durable polyester or polypropylene non-woven fabric, which has high mechanical strength and good water permeability, and can also intercept sludge particles.

[0053] Based on this, the cylinder 51 is activated, causing the piston rod of the cylinder 51 to shorten. At this time, the connecting ring drives the moving hard tube 64 to move vertically downward in the hollow inner tube 232, which in turn pushes the adsorption hard tube 66 to extend vertically downward from the extension hole 233a into the electroplating sludge in the hopper 2.

[0054] Meanwhile, the water-absorbing filter assembly 6 includes a negative pressure pump 61, a drain hose 62, a water-absorbing hose 63, a movable rigid pipe 64, an adapter 65, and an adsorption rigid pipe 66. These components work together to form a complete negative pressure water-absorbing system. The negative pressure pump 61 is installed on the side of the trapezoidal support plate 23 facing away from the hopper 2. Its pump inlet end is connected to the water-absorbing hose 63, providing continuous negative pressure suction. The pump outlet end discharges the absorbed water to the outside of the hopper 2 through the drain hose 62, effectively preventing water backflow or secondary pollution. The movable rigid pipe 64 is vertically slidably inserted into the hollow inner tube 232 and connected to the piston rod of the cylinder 51 via a connecting ring, allowing the movable rigid pipe 64 to slide precisely up and down within the hollow inner tube 232, ensuring that the adsorption rigid pipe 66 can penetrate deeply into the electroplating sludge within the hopper 2. The adsorption tube 66 is connected to the movable tube 64 via an adapter 65. Multiple adsorption holes 7 on its wall generate strong negative pressure suction under the action of the negative pressure pump 61, thereby efficiently drawing in moisture from the electroplating sludge. To prevent sludge particles from entering the adsorption tube 66, a non-woven fabric layer 71 is applied to the surface of the adsorption holes 7. The non-woven fabric effectively blocks sludge particles while ensuring that moisture can smoothly enter the adsorption tube 66. The inner diameter of the adsorption tube 66 is smaller than that of the movable tube 64. This gradual structural design effectively improves water absorption efficiency and enhances the range of negative pressure suction. Furthermore, the adsorption tube 66 extends into the hopper 2 through the extension hole 233a at the bottom of the hollow horizontal tube 233, allowing for targeted removal of moisture from the deeper layers of the electroplating sludge in the hopper 2, avoiding incomplete dehydration caused by residual moisture. Through this design, the water-absorbing filter sludge assembly 6 can comprehensively and efficiently remove moisture from each layer of electroplating sludge, which not only significantly reduces the water content of the sludge, but also improves the overall stability and dewatering efficiency of the equipment operation, thereby optimizing the economy and operability of the subsequent heavy metal extraction and recovery process.

[0055] It is worth noting that when the piston rod of cylinder 51 is extended to its maximum state, the adsorption hard tube 66 is lifted by the lifting action of the moving hard tube 64, so that the lower end of the adsorption hard tube 66 is flush with the extension hole 233a. This allows the adsorption hard tube 66 to block the extension hole 233a, thus preventing the electroplating sludge that has entered the hopper 2 from re-entering the hollow horizontal tube 233. Furthermore, in order to improve the moving guiding effect of the adsorption hard tube 66, a guide post is vertically provided inside the hollow horizontal tube 233. The lower end of the guide post is also flush with the extension hole 233a, and the guide post allows the adsorption hard tube 66 to slide vertically inside it.

[0056] In some implementations, combined with Figure 5 , Figure 7An adsorption hose 67 is connected to each side of the adsorption rigid tube 66 on the adapter 65. A curved guide tube 8 is provided on each side of the adsorption rigid tube 66 inside the hollow horizontal tube 233. One end of the curved guide tube 8 is vertically downward, and it is used for inserting the adsorption hose 67. Guided by the curved guide tube 8, the adsorption hose 67 extends downward into the hopper 2 at a position away from the adsorption rigid tube 66. For example, the adsorption hose 67 also has adsorption holes 7, and the surface of the adsorption holes 7 is covered with a non-woven fabric layer 71.

[0057] Based on this, the adapter 65 is connected to adsorption hoses 67 on both sides of the adsorption rigid tube 66. These adsorption hoses 67 are guided by the curved guide tube 8 to extend downwards into the hopper 2 at a position away from the adsorption rigid tube 66. Combined with the stirring mechanism 3's operation to agitate the electroplating sludge, the area covered by the adsorption holes 7 is expanded, allowing the equipment to more comprehensively contact and remove moisture from the sludge in all areas of the hopper 2. One end of the curved guide tube 8 is designed to face downwards, which can accurately guide the adsorption hoses 67 to be inserted into the target area.

[0058] Meanwhile, the adsorption hose 67 is also equipped with adsorption holes 7, and a non-woven fabric layer 71 is covered on the surface of the adsorption holes 7. The non-woven fabric layer 71 plays an effective filtering role, blocking electroplating sludge particles when water enters the hose, thereby ensuring the unobstructed flow of the internal channels of the adsorption hose 67 and the stability of the water absorption efficiency. Through this structural design, the adsorption rigid tube 66 and the adsorption hose 67 work together to achieve both strong concentrated water absorption and coverage of a larger sludge area, significantly enhancing the overall dewatering effect of the sludge. This design not only improves the efficiency of sludge dewatering, but also makes the equipment more adaptable to handling electroplating sludge with different humidity and distribution conditions, further optimizing the operating efficiency and reliability of the heavy metal extraction and recovery process.

[0059] For example, Figure 5 as well as Figure 7 As shown, the curved guide tube 8 includes a first arc-shaped tube 81, a horizontal tube 82, and a second arc-shaped tube 83. The first arc-shaped tube 81 gradually changes from a vertical extension to a horizontal extension toward the side away from the adsorption hard tube 66. The horizontal tube 82 is horizontally connected to the end of the first arc-shaped tube 81 away from the adsorption hard tube 66. The second arc-shaped tube 83 gradually changes from a horizontal extension to a vertical extension, and the second arc-shaped tube 83 is connected to the end of the horizontal tube 82 away from the first arc-shaped tube 81. The lower end of the second arc-shaped tube 83 is flush with the lower wall of the hollow horizontal tube 233.

[0060] Based on this, the curved guide tube 8 consists of a first arc-shaped tube 81, a horizontal tube 82, and a second arc-shaped tube 83. The first arc-shaped tube 81 achieves a smooth transition from vertical to horizontal extension, guiding the adsorption hose 67 to a position away from the adsorption rigid tube 66, providing more space and angular flexibility for subsequent water absorption operations. The horizontal tube 82 connects the first arc-shaped tube 81 and the second arc-shaped tube 83, ensuring that the adsorption hose 67 remains stable during horizontal extension, thereby avoiding twisting or blockage of the adsorption hose 67 during movement. The second arc-shaped tube 83, through its design of gradually transitioning from horizontal to vertical extension, allows the adsorption hose 67 to be accurately inserted vertically into the hopper 2 from the lower end of the guide tube, aligning with the lower end of the hollow inner tube 232 flush with its lower wall. This design ensures that the adsorption hose 67 can stably penetrate into the target area within the hopper 2, while effectively avoiding the problem of decreased water absorption efficiency caused by irregular guidance. With the cooperation of the three-section curved guide tube 8, the adsorption hose 67 remains under control throughout the entire movement, ensuring that the adsorption holes 7 can cover a wide area inside the hopper 2 and efficiently remove moisture. This structure not only improves the operational reliability of the adsorption hose 67, but also further enhances the equipment's adaptability to complex sludge distribution conditions, thereby increasing the efficiency and stability of the sludge dewatering process.

[0061] In some implementations, such as Figure 3 , Figure 7 as well as Figure 8 As shown, the stirring mechanism 3 includes a motor 31, a first bevel gear 32, a second bevel gear 33, a hollow straight tube 34, a crossbar 35, and an inclined stirring rod 36. The motor 31 is installed in the concave surface of the trapezoidal support plate 23 away from the hopper 2. The first bevel gear 32 is coaxially installed on the output shaft of the motor 31. The hollow straight tube 34 is vertically rotatably disposed on the bottom surface of the trapezoidal support plate 23 and extends vertically downward into the hopper 2. The second bevel gear 33 is coaxially disposed on the outer peripheral wall of the hollow straight tube 34, and the first bevel gear 32 and the second bevel gear 33 mesh with each other.

[0062] For example, multiple horizontal bars 35 are provided on the wall of the hollow straight tube 34 near the inside of the hopper 2, and inclined stirring rods 36 are provided at the end of the horizontal bars 35 away from the hollow straight tube 34, and the extension direction of the inclined stirring rods 36 is consistent with the inclination angle of the side wall of the hopper 2.

[0063] For example, the hollow inner tube 232 extends vertically through the hollow straight tube 34, and extends vertically from above the trapezoidal support plate 23 into the hopper 2 along the interior of the hollow straight tube 34, with a gap between the hollow inner tube 232 and the hollow straight tube 34.

[0064] With this configuration, the motor 31 is installed within the concave surface of the trapezoidal support plate 23. A first bevel gear 32 is mounted on the output shaft of the motor 31, meshing with a second bevel gear 33 on the outer circumferential wall of the hollow straight tube 34. This enables the transmission of the driving force from the motor 31, allowing the hollow straight tube 34 to rotate vertically. Multiple horizontal bars 35 are horizontally arranged on the tube wall of the hollow straight tube 34 near the interior of the hopper 2. One end of each horizontal bar 35 is equipped with an inclined stirring rod 36 at an angle consistent with the side wall of the hopper 2. When the hollow straight tube 34 rotates under the drive of the motor 31, the horizontal bars 35 and the inclined stirring rod 36 work together to agitate the electroplating sludge in the hopper 2 from all directions and multiple angles, thereby evenly distributing the sludge and improving the subsequent dewatering effect.

[0065] Meanwhile, the structural layout between the mixing mechanism 3 and the water-absorbing filter assembly 6 ensures their independence. Specifically, the hollow inner tube 232 vertically penetrates the hollow straight tube 34, and the two remain isolated from each other. The hollow inner tube 232 extends from above the trapezoidal support plate 23 into the hopper 2 along the interior of the hollow straight tube 34 to support the operation of the water-absorbing filter assembly 6. This design ensures that the water-absorbing filter assembly 6 is not affected by the rotation of the mixing mechanism 3 during water adsorption and desludge removal operations. Through the above technical design, the mixing mechanism 3 and the water-absorbing filter assembly 6 can work efficiently and collaboratively in the same equipment, performing different functions without interfering with each other, thereby significantly improving sludge treatment efficiency and the reliability of the overall equipment performance.

[0066] In some implementations, combined with Figure 5 , Figure 7 An orientation mechanism 9 is fitted around the outside of the adsorption hose 67. The orientation mechanism 9 can bend synchronously with the adsorption hose 67, and can drive the section of the adsorption hose 67 outside the curved guide tube 8 to always remain straight. This makes the portion of the adsorption hose 67 outside the upper end of the curved guide tube 8 less prone to bending when subjected to the downward pressure of the moving rigid tube 64, and at the same time makes the portion of the adsorption hose 67 outside the lower end of the curved guide tube 8 less prone to bending and touching the stirring mechanism 3 when the hopper 2 is tilted. For example, "less prone to bending and touching the stirring mechanism 3" means touching the inclined stirring rod 36 of the stirring mechanism 3.

[0067] For example, in combination Figure 9 , Figure 10 as well as Figure 11The orientation mechanism 9 includes hollow tube sections 91, lugs 92, a rotating rod 93, and a torsion spring 94. Multiple hollow tube sections 91 are axially connected, forming a channel through which the adsorption hose 67 passes, and the adsorption hose 67 is adhered to the multiple hollow tube sections 91. Lugs 92 are located at the center of the two sides of the end openings of adjacent hollow tube sections 91. The lugs 92 of two adjacent hollow tube sections 91 are staggered and fitted together, and each of the fitted lugs 92 has a rotating hole. The rotating rod 93 is rotatably inserted into the two rotating holes, and both ends of the rotating rod 93 have anti-detachment parts. The anti-detachment parts are mainly used to limit the lugs 92 and prevent them from falling off the rotating rod 93. For example, the anti-detachment part is a circular plate with an outer diameter larger than the outer diameter of the rotating rod 93.

[0068] For example, the opening edges of adjacent hollow tube sections 91 are inclined arc surfaces, and two adjacent inclined arc surfaces form a rotation gap 911. Along the radial direction of the hollow tube section 91, the width of the rotation gap 911 gradually increases from the side near the lug 92 to the side away from the lug 92.

[0069] For example, the torsion spring 94 is sleeved on the rotating rod 93, and the middle position of the torsion spring 94 is connected to the rod wall of the rotating rod 93, and both ends are connected to a lug 92 respectively. The torsion spring 94 always has the tendency to keep two adjacent hollow tube sections 91 on the same vertical line, and the rotation surface where the adjacent lugs 92 are located when they rotate relative to each other is perpendicular to the rotation surface where the hopper 2 is flipped.

[0070] For example, in combination Figure 12 A sealing membrane 912 is provided between the two hollow tube sections 91 and at the rotation gap 911. The membrane is used to cover the rotation gap 911 to prevent external sludge from entering the hollow tube section 91 through the rotation gap 911. Furthermore, an alignment hole 913 is provided on the hollow tube section 91 at the position corresponding to the adsorption hole 7 on the adsorption hose 67. The surface of the alignment hole 913 is also covered with a non-woven fabric layer 71.

[0071] Based on this, the core components of the orientation mechanism 9 include multiple hollow tube sections 91, lugs 92, rotating rods 93, and torsion springs 94. The multiple hollow tube sections 91 are axially connected to form a channel through which the adsorption hose 67 passes, and the adsorption hose 67 is fixed by adhesive bonding, making the adsorption hose 67 and the hollow tube sections 91 an integrated structure. Lugs 92 are arranged at the end openings of adjacent hollow tube sections 91, and are staggered to form a movable connection. Rotating rods 93 are inserted into rotating holes opened on two adjacent lugs 92, and anti-detachment parts are provided at both ends of the rotating rods 93 to ensure connection stability. Torsion springs 94 are sleeved on the rotating rods 93, with their middle part fixed to the rotating rods 93 and their two ends connected to adjacent lugs 92 respectively. The torsion springs 94 always tend to keep the two adjacent hollow tube sections 91 on the same vertical line, thus keeping the portion of the adsorption hose 67 outside the upper end of the curved guide tube 8 always straight.

[0072] When the movable rigid tube 64 presses down on the adsorption hose 67, the adjacent tube sections will remain vertical to a certain extent under the torsion of the torsion spring 94. This makes it less likely for the section of the adsorption hose 67 located outside the lower end of the curved guide tube 8 to be bent when the movable rigid tube 64 presses down on the adsorption hose 67, thereby allowing the movable rigid tube 64 to maintain a normal and stable pressing effect on the adsorption hose 67.

[0073] The directional mechanism 9 further forms a rotation gap 911 through the inclined arc surface design between the hollow tube sections 91, and the width of the rotation gap 911 gradually increases in the radial direction, thereby providing space for the flexible rotation of the hollow tube sections 91. During this process, since the rotation surface of the lug 92 is perpendicular to the rotation surface when the hopper 2 is tilted, it can be ensured that the adsorption hose 67 does not interfere with the stirring mechanism 3 during the tilting of the hopper 2. That is, although the tilting of the hopper 2 will cause the adsorption hose 67 to have a tendency to tilt and deviate, under the limiting action of the lug 92 and the rotating rod 93, the adsorption hose 67 will not tilt towards the inclined stirring rod 36. At the same time, under the dual action of the torsion force of the torsion spring 94, the adsorption hose 67 can maintain a certain degree of straightness after the hopper 2 is tilted. Meanwhile, a sealing membrane 912 is provided at the rotation gap 911 to effectively prevent external sludge from entering the interior of the hollow tube section 91 through the gap, avoiding failure of the guiding mechanism due to sludge accumulation. In addition, to match the adsorption holes 7 on the adsorption hose 67, each hollow tube section 91 is provided with an alignment hole 913, and the surface of the alignment hole 913 is covered with a non-woven fabric layer 71 to protect the adsorption holes 7 and prevent sludge from clogging the adsorption hose 67.

[0074] Overall, the multi-layered design of the orientation mechanism 9 achieves both structural and functional guidance and operational stability of the adsorption hose 67. On one hand, the combined action of the hollow tube section 91, lug 92, rotating rod 93, and torsion spring 94 ensures that the adsorption hose 67 remains straight when subjected to external force or when the hopper 2 is overturned, thus preventing the portion of the adsorption hose 67 outside the curved guide tube 8 from bending. On the other hand, the application of the sealing membrane 912 and the non-woven fabric covering of the alignment holes 913 optimize the adsorption effect of the hose and prevent sludge contamination of the interior of the orientation mechanism. Through the synergistic effect of these technical features, the orientation mechanism 9 significantly improves the reliability and ease of operation of the equipment in electroplating sludge treatment, while also enhancing its adaptability to complex operating environments.

[0075] In summary, the orientation mechanism 9 allows the adsorption hose 67 to bend and move normally within the curved guide tube 8, while also keeping the portion of the adsorption hose 67 extending out of the curved guide tube 8 straight, thus improving the stability of the adsorption hose 67 during movement.

[0076] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0077] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0078] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A heavy metal extraction and recovery device for electroplating sludge treatment, characterized in that, include: The support frame is installed between the two conveyor belts; The hopper is movably connected to the support frame and can be rotated relative to the support frame. The bottom and sides of the hopper are provided with water filter holes. The feed frame, discharge frame, and trapezoidal support plate are provided. The feed frame and discharge frame are located on the upper sides of the hopper and are connected to the hopper. The trapezoidal support plate is installed between the feed frame and the discharge frame. A stirring mechanism, mounted on a bracket, is used to stir the electroplating sludge in the hopper; The water suction mechanism includes a push-pull assembly and a water suction filter assembly. The water suction filter assembly is movably disposed between the support and the hopper. The push-pull assembly is installed on the support. When electroplating sludge is introduced into the hopper, the push-pull assembly is used to drive the water suction filter assembly into or out of the electroplating sludge. The water suction filter assembly is used to absorb some of the water in the electroplating sludge and discharge it to the outside. A first connecting rod is provided horizontally on the side wall of the trapezoidal support plate away from the hopper, and a hollow inner tube extending vertically into the hopper is connected to the first connecting rod; The bottom of the hollow inner tube is provided with a hollow horizontal tube, which is connected to the hollow inner tube. The water-absorbing and sludge-filtering assembly is movably located between the hollow horizontal tube and the hollow inner tube, and the water-absorbing and sludge-filtering assembly can partially extend out of the hollow horizontal tube and enter the hopper. The water-absorbing filter mud assembly includes a movable rigid tube, an adapter, and an adsorption rigid tube. The adapter is located at the bottom of the movable rigid tube inside the hollow inner tube, and the adsorption rigid tube is connected to the movable rigid tube through the adapter. An adsorption hose is also connected to each side of the adsorption rigid tube on the adapter. A curved guide tube is provided on each side of the adsorption rigid tube inside the hollow horizontal tube. One end of the curved guide tube is vertically downward, and the adsorption hose can extend downward into the hopper at a position away from the adsorption rigid tube under the guidance of the curved guide tube. An orientation mechanism is provided on the outside of the adsorption hose. The orientation mechanism includes a hollow tube section, a lug, a rotating rod, and a torsion spring. Multiple hollow tube sections are axially connected, and the adsorption hose is bonded to multiple hollow tube sections. Lugs are located at the center of the two sides of the end openings of adjacent hollow tube sections. The lugs of two adjacent hollow tube sections are staggered and fitted together, and each of the two fitted lugs has a rotating hole. The rotating rod is inserted into the two rotating holes. The torsion spring is sleeved on the rotating rod, and the middle part of the torsion spring is connected to the rod wall of the rotating rod, and both ends are connected to a lug.

2. The heavy metal extraction and recovery equipment for electroplating sludge treatment according to claim 1, characterized in that, The push-pull assembly includes a cylinder, a second connecting rod, and a connecting part. The cylinder is located inside the trapezoidal support plate. The piston rod of the cylinder extends and retracts vertically in the direction away from the hopper. The second connecting rod is horizontally located on the piston rod of the cylinder. The connecting part is located at the end of the second connecting rod away from the cylinder and is partially connected to the water-absorbing filter assembly. When the piston rod of the cylinder shortens or extends, it drives the water-absorbing filter assembly into or out of the hopper.

3. The heavy metal extraction and recovery equipment for electroplating sludge treatment according to claim 2, characterized in that, The water-absorbing filter assembly also includes a negative pressure pump, a drainage hose, and a water-absorbing hose, wherein... The negative pressure pump is installed on the trapezoidal support plate away from the hopper. The drain hose is connected to the pump outlet end of the negative pressure pump, and the end of the drain hose away from the negative pressure pump extends to the outside of the hopper. The water suction hose is connected to the pump inlet end of the negative pressure pump. The movable rigid tube is vertically slidably inserted into the hollow inner tube. The connecting part is a connecting ring, which is fixedly sleeved on the outer peripheral wall of the movable rigid tube near the top. The end of the water suction hose away from the negative pressure pump is connected to the top opening of the movable rigid tube. The inner diameter of the adsorption hard tube is smaller than the inner diameter of the moving hard tube. An extension hole is provided at the center of the lower tube wall of the hollow horizontal tube, and the adsorption hard tube can extend vertically downward into the hopper through the extension hole. The wall of the adsorption tube is provided with multiple adsorption holes, and the surface of the adsorption holes is covered with a non-woven fabric layer so that when the adsorption holes are subjected to negative pressure suction under the action of the negative pressure pump, water is drawn in and electroplating sludge is blocked from entering the adsorption tube.

4. The heavy metal extraction and recovery equipment for electroplating sludge treatment according to claim 3, characterized in that, The adsorption hose also has adsorption holes, and the surface of the adsorption holes is covered with a non-woven fabric layer.

5. The heavy metal extraction and recovery equipment for electroplating sludge treatment according to claim 4, characterized in that, The curved guide tube includes a first arc-shaped tube, a horizontal tube, and a second arc-shaped tube. The first arc-shaped tube gradually changes from a vertical extension to a horizontal extension towards the side away from the adsorption hard tube. The horizontal tube is horizontally connected to the end of the first arc-shaped tube away from the adsorption hard tube. The second arc-shaped tube gradually changes from a horizontal extension to a vertical extension and is connected to the end of the horizontal tube away from the first arc-shaped tube. The lower end of the second arc-shaped tube is flush with the lower wall of the hollow horizontal tube.

6. A heavy metal extraction and recovery device for electroplating sludge treatment according to any one of claims 1-5, characterized in that, The stirring mechanism includes a motor, a first bevel gear, a second bevel gear, a hollow straight tube, a crossbar, and an inclined stirring rod, wherein... The motor is installed in the concave surface of the trapezoidal support plate away from the hopper. The first bevel gear is coaxially installed on the output shaft of the motor. The hollow straight tube is vertically rotatably disposed on the bottom surface of the trapezoidal support plate and extends vertically downward into the hopper. The second bevel gear is coaxially disposed on the outer peripheral wall of the hollow straight tube, and the first bevel gear meshes with the second bevel gear. Multiple horizontal bars are provided on the wall of the hollow straight tube near the inside of the hopper. The inclined stirring rod is located at the end of the horizontal bar away from the hollow straight tube, and the extension direction of the inclined stirring rod is consistent with the inclination angle of the side wall of the hopper. The hollow inner tube extends vertically through the hollow straight tube, and extends vertically from above the trapezoidal support plate into the hopper along the interior of the hollow straight tube, with a gap between the hollow inner tube and the hollow straight tube.

7. The heavy metal extraction and recovery equipment for electroplating sludge treatment according to claim 1, characterized in that, The rotating rod is equipped with anti-detachment parts at both ends; The opening edges of adjacent hollow tube sections are inclined arc surfaces, and two adjacent inclined arc surfaces form a rotation gap. Along the radial direction of the hollow tube section, the width of the rotation gap gradually increases from the side near the lug to the side away from the lug. The torsion spring always tends to keep two adjacent hollow tube sections on the same vertical line, and the rotation surface where the adjacent lugs are located when they rotate relative to each other is perpendicular to the rotation surface where the hopper is flipped. A sealing membrane is provided between the two hollow tube sections and at the rotation gap. The membrane is used to cover the rotation gap to prevent external sludge from entering the hollow tube section through the rotation gap. The hollow tube section has alignment holes corresponding to the adsorption holes on the adsorption hose, and the surface of the alignment holes is also covered with a non-woven fabric layer.

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