A multi-stage treatment device for industrial heavy metal wastewater

Abstract

The application relates to the technical field of wastewater treatment, in particular to a multistage treatment device for industrial heavy metal wastewater, which comprises an integrated wastewater treatment tank, the integrated wastewater treatment tank is composed of a sedimentation tank, a reaction tank and a residue filter tank, a dosing box is fixedly installed at the upper end of the reaction tank, and a dosing mechanism is arranged on the inner side of the dosing box. By combining the dosing mechanism with the mixing mechanism, intermittent dosing of the medicament during the reaction of the industrial wastewater is realized, the dynamic mixing of the mixed solution in the reaction cavity is ensured, and the heavy metal precipitation reaction efficiency is improved; by combining the aeration assembly with the spherical frame, uniform aeration is realized, and the overall structural support strength of the spherical frame is ensured; by arranging the clamp reinforcing assembly, the spherical frame is clamped, the overall structure is reinforced, the clamp reinforcing assembly is combined with the uniform aeration assembly, the bidirectional locking effect of the two is achieved, the mixing and stirring effect of the wastewater is achieved, and one object has multiple uses.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage treatment device for industrial heavy metal wastewater. Background Technology

[0002] With the rapid development of industries such as non-ferrous metal smelting, electroplating, and chemicals, the problem of heavy metal pollution in industrial wastewater is becoming increasingly serious. Heavy metals (such as copper, nickel, lead, and cadmium) are non-degradable, bioaccumulative, and highly toxic. Once they enter water bodies, they will accumulate through the food chain, seriously threatening the ecological environment and human health. As the discharge of heavy metal wastewater continues to increase, traditional treatment technologies suffer from problems such as low treatment efficiency, insufficient resource recovery rate, and high risk of secondary pollution. There is an urgent need to develop efficient, economical, and environmentally friendly multi-stage treatment devices.

[0003] In existing technologies, such as the integrated sewage treatment equipment disclosed in CN218262199U, the first motor is started during use to drive the stirring shaft to rotate. The stirring shaft drives the bottom stirring paddle to rotate, so that the stirring paddle forms an upward vortex, thereby accelerating the rising rate of the bottom bubbles. At the same time, the stirring shaft drives the first bevel gear to rotate. Under the meshing action, the second bevel gear drives the stirring rod to rotate synchronously, so as to drive the dispersing net to disperse and refine the rising bubbles, thereby expanding the diffusion range of the bubbles. In addition, the defoaming plate and defoaming spikes facilitate the puncturing of the diffused bubbles, so that they can fully contact the sewage, thereby effectively improving the aeration effect of the sewage.

[0004] To address the issue of the relatively simple aeration structure in existing integrated wastewater treatment equipment, the aforementioned document proposes a method to accelerate the rising rate of bottom bubbles.

[0005] However, in actual use, when microbubbles are introduced into the suspended solids system, they interact with the suspended solids in a complex manner as they rise. As the bubbles continue to rise, their surfaces gradually adsorb and accumulate various components from the surrounding suspended solids. The originally small bubbles gradually coalesce and merge, eventually forming larger bubbles, which affects the mixing effect of the reagent and wastewater. Furthermore, fluid short circuits or dead zones are easily formed during the reaction, resulting in insufficient contact between the reagent and wastewater and affecting the heavy metal removal rate.

[0006] Therefore, this invention proposes a multi-stage treatment device for industrial heavy metal wastewater to solve the problem that existing reaction tanks cannot achieve uniform distribution of reagents and aeration during the reaction, and there are mixing dead zones, making it difficult to completely separate heavy metals and impurities from the wastewater. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a multi-stage treatment device for industrial heavy metal wastewater to solve the problems mentioned in the background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A multi-stage treatment device for industrial heavy metal wastewater, including an integrated wastewater treatment tank, which is composed of a sedimentation tank, a reaction tank and a filter residue tank. A dosing tank is fixedly installed at the upper end of the reaction tank, and a dosing mechanism is arranged inside the dosing tank. A wastewater reaction box body is fixedly installed inside the reaction tank. An aeration chamber is arranged between the outer side of the wastewater reaction box body and the inner side of the reaction tank. A reaction chamber is opened inside the wastewater reaction box body, and a mixing mechanism is arranged inside the reaction chamber. The mixing mechanism includes a spherical frame, a uniform aeration component, a hoop reinforcement component and a scraping component.

[0009] Preferably, the dosing mechanism includes an electric telescopic rod, a sealing plate one and a sealing plate two. The outer surfaces of the sealing plate one and the sealing plate two are respectively fixedly connected with the inner wall of the dosing tank. A closed medicine storage cavity is formed between the sealing plate one and the sealing plate two. The inner side of the medicine storage cavity is evenly distributed with piston cylinders. The two ends of the piston cylinder are respectively fixedly connected with the inner walls of the sealing plate one and the sealing plate two. A piston member is movably installed inside the piston cylinder, and a liquid inlet hole is opened on the annular inner wall of the piston cylinder.

[0010] Preferably, a sleeve plate is fixedly installed on the lower outer surface of the wastewater reaction box body. Side plates are respectively fixedly installed on both sides of the sleeve plate. A pressing pedal is rotatably connected to the upper outer surface of the side plate. The pressing pedal is in a "U"-shaped plate structure. A lining plate is fixedly installed on one side of the sleeve plate away from the side plate. A contact spring is fixedly installed on the upper surface of the lining plate. The other end of the contact spring is fixedly connected with the lower surface of the pressing pedal. A linkage push rod is movably abutted against the upper end of the pressing pedal. The upper end of the linkage push rod is fixedly connected with a lifting plate. The inner wall of one side of the lifting plate is slidably connected with the inner surface of the dosing tank, and an electric telescopic rod is fixedly installed at the upper end of the lifting plate.

[0011] Preferably, pin shafts one are fixedly installed on both sides of the pressing pedal. A movable arm rod is rotatably connected to the outer surface of the pin shaft one. One end of the movable arm rod is fixedly connected with a pin shaft two. A cam sleeve plate is fixedly connected to the inside of the pin shaft two. The pin shaft two is eccentrically arranged with respect to the center of the cam sleeve plate.

[0012] Preferably, the uniform aeration component includes a fixed sleeve, a central conveying circular pipe and a sub-balloon. There are two groups of fixed sleeves and they are fixedly installed on both sides of the spherical frame. The outer surface of the fixed sleeve is fixedly connected with the inner wall of the cam sleeve plate. The sub-balloon penetrates through the central inner wall of the central conveying circular pipe and is connected to it in a through manner. The outer surface of the central conveying circular pipe is fixedly connected with the inner wall of the fixed sleeve, and the outer surface of the fixed sleeve is respectively rotatably connected with the inner wall of the wastewater reaction box body.

[0013] Preferably, a reinforcing strip is fixedly connected to the outer ring surface of the dividing balloon body, and a conveying branch pipe is fixedly installed on both sides of the reinforcing strip. The input end of the conveying branch pipe is connected to the annular inner wall of the dividing balloon body. Aeration holes are evenly opened on the inner surface of the conveying branch pipe, and a threaded sleeve is fixedly installed at the end of the conveying branch pipe away from the dividing balloon body.

[0014] Preferably, the clamp reinforcement assembly includes an arc-shaped clamp rod one and an arc-shaped clamp rod two. Both the arc-shaped clamp rod one and the arc-shaped clamp rod two have a "C"-shaped plate structure. A reserved groove is provided on the inner wall of the center of the arc-shaped clamp rod one and the arc-shaped clamp rod two. A locking bolt passes through the inner surface of the reserved groove. The outer surface of the locking bolt is threaded to the inner surface of the threaded sleeve.

[0015] Preferably, the scraping assembly includes a mounting strip, the inner side of which has a fitting groove, the inner surface of which fits and engages with the outer surfaces of the first and second arc-shaped retaining rods, the inner surface of which has a buffer groove, the bottom surface of which has a sliding groove, the inner surface of which is movably connected to a cleaning strip mounting plate, the outer side of which is fixedly mounted with a cleaning silicone strip, the outer surface of which is movably connected to the inner wall of the reaction chamber, and a buffer element is provided between the cleaning strip mounting plate and the inner side of the buffer groove.

[0016] Preferably, the buffer component includes an elastic abutment block and a supporting plate. The elastic abutment block has an "A"-shaped block structure. Both ends of the elastic abutment block are fixedly connected to the bottom surface of the inner cavity of the buffer groove and the bottom surface of the inner side of the cleaning strip mounting plate, respectively. One end of the supporting plate is rotatably connected to the outer surface of the elastic abutment block, and the other end of the supporting plate is rotatably connected to an abutment roller. Both outer surfaces of the supporting plate are rotatably connected to diagonal braces, and the other ends of the diagonal braces are movably connected to a slider. The outer surface of the slider is slidably connected to the inner wall of the groove. A telescopic abutment piece is fixedly connected to one inner wall of the groove, and the other end of the telescopic abutment piece is fixedly connected to the outer surface of the slider.

[0017] Preferably, the outer circumferential surface of the spherical frame is uniformly provided with spherical through grooves, and an auxiliary shearing component is provided on the inner side of the spherical through grooves. The auxiliary shearing component includes a spherical insert, which is fixedly installed on the inner side of the spherical through groove and adapted to be connected thereto. An adapter strip is fixedly installed on the inner surface of the spherical insert.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention proposes a multi-stage treatment device for industrial heavy metal wastewater. It combines a dosing mechanism with a mixing mechanism to achieve intermittent dosing of reagents during the industrial wastewater reaction while ensuring dynamic mixing of the liquid within the reaction chamber, thereby improving the efficiency of heavy metal precipitation. By combining an aeration component with a spherical frame, uniform aeration is achieved while maintaining the overall structural strength of the spherical frame. The use of a clamping reinforcement component forms a clamp around the spherical frame, reinforcing the overall structure and working in conjunction with the uniform aeration component to achieve a two-way locking effect, while also mixing and agitating the wastewater, thus realizing multiple uses from a single device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the integrated wastewater treatment tank of the present invention;

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of a half-section structure;

[0022] Figure 3 This is a schematic diagram of the connection structure between the wastewater reaction tank and the dosing tank of the present invention;

[0023] Figure 4 For the present invention Figure 3 A schematic diagram of a partial cross-sectional structure;

[0024] Figure 5 For the present invention Figure 3 A schematic diagram of the frontal half-section structure;

[0025] Figure 6 For the present invention Figure 5 A magnified structural diagram at point A;

[0026] Figure 7 For the present invention Figure 3 Schematic diagram of the structure of the wastewater removal reaction tank and the dosing tank;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the hybrid mechanism of the present invention;

[0028] Figure 9 This is a schematic diagram of the connection structure between the spherical frame and the scraping assembly of the present invention;

[0029] Figure 10 This is a schematic diagram showing the disassembled structure of the uniform exposure component and the clamp reinforcement component of the present invention;

[0030] Figure 11 This is a schematic diagram of a partial cross-sectional structure of the scraping assembly of the present invention;

[0031] Figure 12 For the present invention Figure 11 A magnified structural diagram at point B;

[0032] Figure 13 For the present invention Figure 11 A magnified structural diagram at point C.

[0033] In the diagram: 1. Sedimentation tank; 11. Clear water outlet; 12. Sludge outlet; 13. Wastewater pipe one; 14. Wastewater pipe two; 15. Wastewater outlet pipe; 2. Reaction tank; 3. Filter tank; 4. Wastewater reaction chamber; 40. Reaction chamber; 41. Mounting plate; 411. Side plate; 412. Liner; 413. Abutment spring; 414. Pressure pedal; 415. Pin one; 416. Movable arm; 417. Pin two; 418. Cam sleeve; 5. Dosing box; 51. Electric telescopic rod; 511. Lifting plate; 512. Linkage push rod; 52. Sealing plate one; 53. Sealing plate two; 54. Piston cylinder; 541. Piston component; 6. Spherical frame; 60. Spherical through groove; 600. Connecting block; 61. Fixed sleeve; 611. 612. Central conveying circular pipe; 613. Balloon body; 614. Reinforcing strip; 615. Conveying branch pipe; 62. Arc-shaped support rod one; 621. Arc-shaped support rod two; 622. Reserved groove; 623. Locking bolt; 624. Threaded sleeve; 63. Mounting strip plate; 630. Buffer groove; 6301. Slide groove; 631. Cleaning strip mounting plate; 632. Cleaning silicone strip; 6311. Elastic abutment block; 6312. Abutment plate; 6313. Abutment roller; 6314. Diagonal brace; 6315. Sliding block; 6302. Telescopic abutment piece; 633. Protruding plate; 6331. Limiting sleeve; 6332. Spring wire; 6333. Sliding support rod; 6334. Guide wheel; 64. Spherical insert; 641. Adaptor strip; 65. Support column; 651. Scooping trough. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0035] Example 1, please refer to Figure 1-13, the present invention provides a technical solution: a multi-stage treatment device for industrial heavy metal wastewater, including an integrated wastewater treatment tank, which is composed of a sedimentation tank 1, a reaction tank 2 and a filter residue tank 3. At the upper end of the filter residue tank 3, a wastewater input opening is provided, and a filter residue grid is movably installed inside the filter residue tank 3 for intercepting large metal debris, plastics, etc. On the lower inner wall of the filter residue tank 3, a wastewater outlet pipe 15 is provided, and on one side of the filter residue tank 3 away from the wastewater outlet pipe 15, a wastewater communication pipe two 14 that penetrates through to the inside of the reaction tank 2 is hermetically connected. The reaction tank 2 is in the biological treatment stage to achieve the separation treatment of metal ions and sludge in industrial wastewater. The sedimentation tank 1 is used for the sedimentation treatment of the separated sludge, and the separation of biological sludge and supernatant is achieved through gravitational settlement. On one inner wall of the sedimentation tank 1, a clear liquid outlet 11 and a sludge outlet 12 are respectively hermetically connected. A wastewater communication pipe one 13 is connected through between the sedimentation tank 1 and the reaction tank 2 to guide the mixed wastewater and discharge it into the inside of the sedimentation tank 1 for sedimentation treatment. Among them, the clear liquid outlet 11 is used for the discharge of the supernatant, and the sludge outlet 12 is used for the discharge of sludge. At the upper end of the reaction tank 2, a dosing tank 5 is fixedly installed, and a dosing mechanism is provided inside the dosing tank 5. Inside the reaction tank 2, a wastewater reaction box body 4 is fixedly installed. Between the outer side of the wastewater reaction box body 4 and the inner side of the reaction tank 2, an aeration chamber is provided. The aeration chamber has a "hui" - shaped structure. Inside the wastewater reaction box body, a reaction chamber 40 is provided. Inside the reaction chamber 40, a mixing mechanism is provided. The mixing mechanism includes a spherical frame 6, an even aeration component, a hoop reinforcement component and a scraping component;

[0036] In this embodiment, by combining the dosing mechanism and the mixing mechanism, while realizing the intermittent dosing of the medicament during the reaction of industrial wastewater, it ensures the dynamic mixing of the mixed liquid in the reaction chamber 40 and improves the heavy metal precipitation reaction efficiency; by combining the aeration component and the spherical frame 6, while realizing uniform aeration, it ensures the overall structural support strength of the spherical frame 6; with the setting of the hoop reinforcement component, a hoop is formed on the spherical frame 6, which not only realizes the reinforcement of the overall structure, but also combines with the even aeration component to play a role of double - way locking of the two, and also achieves the effect of mixing and stirring the wastewater, realizing multiple functions with one object.

[0037] Embodiment Two, referring to the appendix Figure 1-13, on the basis of the first embodiment, in order to realize the linkage rotation of the mixing mechanism while the medicament is intermittently and dispersedly added: the dosing mechanism includes an electric telescopic rod 51, a first sealing plate 52 and a second sealing plate 53. The outer surfaces of the first sealing plate 52 and the second sealing plate 53 are respectively fixedly connected to the inner wall of the dosing tank 5. A closed medicine storage cavity is formed between the first sealing plate 52 and the second sealing plate 53. The inner side of the medicine storage cavity is evenly distributed with piston cylinders 54. The two ends of the piston cylinder 54 are respectively fixedly connected to the inner walls of the first sealing plate 52 and the second sealing plate 53. A piston member 541 is movably installed inside the piston cylinder 54. Liquid inlet holes are provided on the annular inner wall of the piston cylinder 54; a sleeve plate 41 is fixedly installed on the lower outer surface of the wastewater reaction box body 4. Side plates 411 are respectively fixedly installed on both sides of the sleeve plate 41. A pressure pedal 414 is rotatably connected to the upper outer surface of the side plate 411. The pressure pedal 414 is in the shape of a "匚"-shaped plate structure. A lining plate 412 is fixedly installed on one side of the sleeve plate 41 away from the side plate 411. A contact spring 413 is fixedly installed on the upper surface of the lining plate 412. The other end of the contact spring 413 is fixedly connected to the lower surface of the pressure pedal 414. A linkage push rod 512 is movably abutted against the upper end of the pressure pedal 414. The upper end of the linkage push rod 512 is fixedly connected to a lifting plate 511. The inner wall of one side of the lifting plate 511 is slidably connected to the inner surface of the dosing tank 5. And an electric telescopic rod 51 is fixedly installed at the upper end of the lifting plate 511; pin shafts 415 are fixedly installed on both sides of the pressure pedal 414. A movable arm rod 416 is rotatably connected to the outer surface of the pin shaft 415. One end of the movable arm rod 416 is fixedly connected to a pin shaft 417. A cam sleeve plate 418 is fixedly connected to the inner side of the pin shaft 417. The pin shaft 417 is eccentrically arranged about the center of the cam sleeve plate 418; the uniform aeration component includes a fixed sleeve 61, a central conveying circular pipe 611 and a sub-ball body 612. There are two groups of fixed sleeves 61 and they are fixedly installed on both sides of the spherical frame 6. The outer surface of the fixed sleeve 61 is fixedly connected to the inner wall of the cam sleeve plate 418. The sub-ball body 612 penetrates through and is connected to the inner wall of the center of the central conveying circular pipe 611. The outer surface of the central conveying circular pipe 611 is fixedly connected to the inner wall of the fixed sleeve 61. And the outer surface of the fixed sleeve 61 is respectively rotatably connected to the inner wall of the wastewater reaction box body 4;

[0038] In this embodiment, when it is necessary to add the agent to the storage cavity formed by sealing plate 52 and sealing plate 53, the electric telescopic rod 51 is controlled to extend and retract, realizing the vertical movement of the lifting plate 511, which in turn drives the synchronous movement of multiple sets of piston parts 541. When the piston part of the piston part 541 is raised and misaligned with the preset liquid inlet hole on the piston cylinder 54, the mixed agent flows in through the liquid inlet hole and is finally output through the bottom of the piston cylinder 54, entering the reaction chamber 40 to achieve the dispersion and addition of the agent. With this setting, the addition of the agent in a single direction can be avoided, and the uniformity of the dispersion of the agent and industrial wastewater can be maintained. In addition, the lifting and lowering movement of the lifting plate 511 drives the linkage push rod 512 to move horizontally, and the outer surface of the linkage push rod 512 is in contact with the reaction chamber 40. The upper inner wall of the reaction tank 2 is slidably connected, and the vertical movement of the linkage push rod 512 is limited by the reaction tank 2. During the lifting and lowering of the linkage push rod 512, the bottom end of the linkage push rod 512 abuts against the upper surface of the pressure pedal 414. When the pressure pedal 414 is pressed down, it pushes the abutment spring 413 downward to generate compression. When the pressure pedal 414 is raised, the abutment spring 413 assists the pressure pedal 414 to reset. With the connection between the movable arm 416 and the cam sleeve 418, the movable arm 416 can be driven to make a circular motion around the center of the fixed sleeve 61. In this way, the overall rotation of the spherical frame 6 is realized. While realizing the intermittent dispersion addition of the agent through a power source, the linkage rotation of the mixing mechanism is also ensured, so that one mechanism can achieve two effects simultaneously.

[0039] Example 3, refer to Appendix Figure 1-13 Based on Example 2, in order to achieve thorough mixing of the reagent and wastewater while uniform aeration during the reaction in the reaction chamber 40, and to reduce the surface area of ​​the floating bubbles: a reinforcing strip 613 is fixedly connected to the outer ring surface of the dividing balloon body 612, and a conveying branch pipe 614 is fixedly installed on both sides of the reinforcing strip 613. The input end of the conveying branch pipe 614 is connected to the annular inner wall of the dividing balloon body 612. Aeration holes are uniformly opened on the inner surface of the conveying branch pipe 614, and a threaded sleeve 624 is fixedly installed at the end of the conveying branch pipe 614 away from the dividing balloon body 612; the clamping reinforcement assembly includes an arc-shaped clamp. Rod 1 62 and Arc-shaped support rod 2 621 are both C-shaped plate structures. A reserved groove 622 is opened on the inner wall of the center of Arc-shaped support rod 1 62 and Arc-shaped support rod 2 621. A locking bolt 623 passes through the inner surface of the reserved groove 622. The outer surface of the locking bolt 623 is threaded to the inner surface of the threaded sleeve 624. A connecting block 600 is fixedly installed on the side of the ball frame 6 that is relatively away from the reserved groove 622. The outer surface of the connecting block 600 is adapted to fit into the connection end of Arc-shaped support rod 1 62 and Arc-shaped support rod 2 621 respectively.

[0040] In this embodiment, before mixing the pharmaceutical agent with industrial wastewater, the first arc-shaped support rod 62 and the second arc-shaped support rod 621 are assembled. When their ends are joined, they fit into the connecting block 600. At this time, the first arc-shaped support rod 62 and the second arc-shaped support rod 621 form a clamp around the spherical frame 6. Furthermore, the through-hole locking bolt 623 achieves bidirectional locking with the threaded sleeve 624. This design increases the clamp structure at the maximum diameter position of the spherical frame 6, thereby ensuring the overall structural integrity of the spherical frame 6. The structural support strength is improved, enhancing the stability of the spherical frame 6 during mixed operation. At the same time, the installation of the arc-shaped support rod 62 ensures the stability of the distribution of multiple sets of conveying branch pipes 614. The central conveying circular pipe 611, the dividing spherical body 612, the reinforcing strip 613, and the conveying branch pipes 614 work together to form a cross structure, achieving uniform aeration in all directions while providing structural support to the inner circumference of the spherical frame 6. Thus, the spherical frame 6 is strengthened in both directions, ensuring the stability of wastewater treatment.

[0041] It is also worth noting that when the spherical frame 6 is rotated as a whole by the combined swing of the movable arm 416, the arc-shaped retaining rod 1 62 and arc-shaped retaining rod 2 621 can also act as mixing components for the mixed wastewater, accelerate the shearing of bubbles, and prevent the bubbles from rising and growing larger, thus affecting the removal effect of oil stains in the upper suspended solids.

[0042] Example 4, see attached document Figure 1-13Based on Example 3, in order to achieve thorough mixing of wastewater in the reaction chamber 40 and avoid the existence of dead mixing zones where sludge settles at the bottom and is difficult to react: the scraping assembly includes a mounting strip 63. A fitting groove is provided on the inner side of the mounting strip 63. The inner surface of the fitting groove fits and engages with the outer surfaces of the first arc-shaped retaining rod 62 and the second arc-shaped retaining rod 621. A buffer groove 630 is provided on the inner surface of the mounting strip 63. A sliding groove 6301 is provided on the bottom surface of the inner cavity of the buffer groove 630. A cleaning strip mounting plate 631 is movably connected to the inner surface of the buffer groove 630. A cleaning silicone strip 632 is fixedly mounted on the outer side of the mounting plate 631. The outer surface of the cleaning silicone strip 632 is movably connected to the inner wall of the reaction chamber 40. A buffer is provided between the cleaning strip mounting plate 631 and the inner side of the buffer groove 630. The buffer includes an elastic abutment 6311 and a retaining plate 6312. The elastic abutment 6311 has an "A"-shaped block structure. Both ends of the elastic abutment 6311 are fixedly connected to the bottom surface of the inner cavity of the buffer groove 630 and the bottom surface of the inner side of the cleaning strip mounting plate 631, respectively. One end of the retaining plate 6312 is rotated with the outer surface of the elastic abutment 6311. The abutment plate 6312 is rotatably connected to abutment roller 6313 at one end. Diagonal braces 6314 are rotatably connected to the outer surfaces of both sides of the abutment plate 6312. A slider 6315 is movably connected to the other end of the diagonal braces 6314. The outer surface of the slider 6315 is slidably connected to the inner wall of the slide groove 6301. A telescopic abutment piece 6302 is fixedly connected to one inner wall of the slide groove 6301. The other end of the telescopic abutment piece 6302 is fixedly connected to the outer surface of the slider 6315. A protruding plate 633 is fixedly installed on the outer surfaces of both sides of the mounting strip 63. A limiting sleeve 6331 is fixedly installed on the lower surface of the reaction chamber 40. A spring wire 6332 is fixedly connected to the bottom surface of the inner cavity of the limiting sleeve 6331. A sliding support rod 6333 is fixedly connected to the other end of the spring wire 6332. The lower outer surface of the sliding support rod 6333 is slidably connected to the inner wall of the limiting sleeve 6331, and the upper outer surface of the sliding support rod 6333 is slidably connected to the inner wall of the protrusion plate 633. A guide wheel 6334 is rotatably connected to the end of the sliding support rod 6333 away from the spring wire 6332. The outer surface of the guide wheel 6334 is movably connected to the side wall of the reaction chamber 40.

[0043] In this embodiment, by adapting and fitting the connecting block 600 to the inner groove of the mounting strip 63, the entire scraping assembly can be assembled with the spherical frame 6. On the other hand, when the mounting strip 63 is installed as a whole, the assembly ports of the first arc-shaped retaining rod 62 and the second arc-shaped retaining rod 621 can also be tightened. This not only realizes the installation of the scraping assembly on the spherical frame 6, but also simultaneously realizes the tightening of the assembly ends of the first arc-shaped retaining rod 62 and the second arc-shaped retaining rod 621, ensuring the four-point limit when the first arc-shaped retaining rod 62 and the second arc-shaped retaining rod 621 are installed with the spherical frame 6, further increasing the installation strength.

[0044] When the spherical frame 6 rotates under the linkage, the scraping assembly moves synchronously and comes into contact with the side wall of the reaction chamber 40. Specifically, the cleaning silicone strip 632 abuts against the side wall of the reaction chamber 40. With the help of the buffer, the cleaning strip mounting plate 631 can extend beyond the clamping strip plate 63 to a certain extent according to the change of the inner diameter of the reaction chamber 40. On the other hand, when the cleaning silicone strip 632 rotates to the parallel side walls on both sides of the reaction chamber 40, the cleaning strip mounting plate 631 moves inward. At this time, the elastic block 6311 is squeezed, and the abutting roller 6313 and the holding plate 6312 are squeezed by the cleaning strip mounting plate 631. As the angle changes, the components rotate to the side away from the elastic abutment 6311. At the same time, the angle of the diagonal brace 6314 changes, pushing the slider 6315 to slide outward. This compresses the telescopic abutment 6302, ensuring the adaptive fit between the cleaning silicone strip 632 and the side wall of the reaction chamber 40, and also providing compression buffer for the cleaning strip mounting plate 631. It is worth noting that the scraping component here not only scrapes up sediment and side dirt, but also assists in agitating the mixed wastewater, and enhances the installation strength of the arc-shaped retaining rod 62 and the arc-shaped retaining rod 621, achieving a multi-purpose effect.

[0045] In addition, it should be noted that adaptive guide wheels 6334 are connected to both sides of the mounting strip 63, which further ensures the stability of the scraping component during movement, ensures smooth movement, and avoids jamming.

[0046] Example 5, see attached document Figure 1-13 Based on Example 4, in order to achieve auxiliary shearing of floating air bubbles in mixed wastewater, this example adds an auxiliary shearing component and an auxiliary lifting component: spherical grooves 60 are evenly opened on the outer circumference of the spherical frame 6, and an auxiliary shearing component is provided on the inner side of the spherical grooves 60. The auxiliary shearing component includes a spherical insert 64, which is fixedly installed on the inner side of the spherical grooves 60 and adapted to be connected thereto. An adapter strip 641 is fixedly installed on the inner surface of the spherical insert 64. An auxiliary lifting component is provided on the inner side of the spherical insert 64, which includes a support column 65 and a scooping trough 651. The support column 65 is fixedly installed at both ends of the spherical insert 64, and a pin three is fixedly connected to one outer end of the support column 65. The outer surface of the pin three is movably connected to both ends of the scooping trough 651.

[0047] In this embodiment, the overall structure of the spherical frame 6 is optimized by fitting multiple sets of spherical inserts 64 at the spherical through-slot 60. The adapter strip 641 is used to shear the air bubbles in the mixed wastewater, avoiding the increase of the surface area of ​​the floating air bubbles and the formation of a metal oil film in the industrial wastewater that is difficult to dissolve. With the design of the support column 65 and the scooping trough 651, the support column 65 can support the scooping trough 651 and also assist in the agitation of the wastewater. In addition, the scooping trough 651 is connected to the support column 65 by a pin. Under the gravity of the scooping trough 651, the wastewater can be scooped up and down in a parabolic manner, which accelerates the separation of heavy metal ions and sludge in the wastewater.

[0048] Example 6, see attached document Figure 1-13 Based on Example 5, the present invention also proposes a method for using a multi-stage treatment device for industrial heavy metal wastewater, comprising the following steps:

[0049] Step 1: Wastewater pretreatment and preliminary filtration: Industrial heavy metal wastewater is fed into the filter tank 3 of the integrated wastewater treatment tank through the upper opening. The wastewater first passes through the filter grid on the inner side of the filter tank 3 to intercept large metal fragments, plastic and other solid impurities, achieving preliminary filtration. The filtered wastewater enters the biological treatment stage reaction tank 2 through the wastewater outlet pipe 15 on the lower inner wall of the filter tank 3 and the wastewater pipe 14 that runs through the inner side of the reaction tank 2, in preparation for subsequent metal ion and sludge separation treatment.

[0050] Step 2: Intermittent dosing and mixing reaction of reagents: In the closed storage cavity formed between the sealing plate 52 and the sealing plate 53 of the dosing mechanism, reagents are pre-loaded to react with heavy metal ions in the wastewater. The electric telescopic rod 51 is extended and retracted, driving the lifting plate 511 to move vertically, thereby raising the piston part of the piston 541 and offsetting it from the pre-set liquid inlet on the piston cylinder 54. The mixed reagents flow in through the liquid inlet and are finally output from the bottom of the piston cylinder 54, entering the reaction chamber 40 to achieve the dispersion dosing of the reagents and ensure the uniformity of the dispersion of the reagents and industrial wastewater. At the same time as the reagents are added, the spherical frame 6 of the mixing mechanism rotates under the linkage of the linkage push rod 512 and the pressure pedal 414. The mixing mechanism in the spherical frame 6 ensures the dynamic mixing of the mixed liquid in the reaction chamber 40, improving the efficiency of the heavy metal precipitation reaction.

[0051] Step 3: Uniform Aeration and Structural Reinforcement: The aeration components uniformly aerate the reaction chamber 40 through the "U"-shaped aeration chamber, forming a microbubble diffusion flow pattern, which enhances the gas-liquid mass transfer efficiency. The arc-shaped support rod 1 62 and arc-shaped support rod 2 621 are assembled to form a clamp on the spherical frame 6. The clamp structure at the maximum diameter position of the spherical frame 6 is increased by the bidirectional locking of the locking bolt 623 and the threaded sleeve 624, which ensures the support strength of the overall structure of the spherical frame 6 and improves the stability during mixing. The uniform aeration components and the clamp reinforcement components work together to form a cross structure, which achieves uniform aeration in all directions while providing structural support to the inner circumference of the spherical frame 6, ensuring the stability of wastewater treatment.

[0052] Step 4: Thorough Mixing, Scraping, and Auxiliary Shearing of Wastewater: Through the rotation of the spherical frame 6, the aeration of the uniform aeration component, and the stirring of the clamping reinforcement component, the wastewater in the reaction chamber 40 is thoroughly mixed, avoiding dead zones and ensuring that the sludge and metal ions in the wastewater fully contact and react. The scraping component moves synchronously with the rotation of the spherical frame 6, adhering to the side wall of the reaction chamber 40 to scrape up sediment and side dirt. At the same time, the buffer component adapts to the changes in the inner diameter of the reaction chamber 40 to ensure the scraping effect. The auxiliary shearing component, spherical insert 64, shears the air bubbles floating in the mixed wastewater through the adapter strip 641 to prevent the surface area of ​​the air bubbles from increasing and affecting the treatment effect. The support column 65 and the scooping trough 651 are connected by a pin shaft to achieve auxiliary stirring and reciprocating scooping of the wastewater, accelerating the separation of heavy metal ions in the wastewater from the sludge and improving the treatment efficiency.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage treatment device for industrial heavy metal wastewater, comprising an integrated wastewater treatment tank, wherein the integrated wastewater treatment tank is composed of a sedimentation tank (1), a reaction tank (2), and a filter cake tank (3), characterized in that: A dosing box (5) is fixedly installed at the upper end of the reaction tank (2). A dosing mechanism is provided on the inner side of the dosing box (5). A wastewater reaction tank (4) is fixedly installed on the inner side of the reaction tank (2). An aeration chamber is provided between the outer side of the wastewater reaction tank (4) and the inner side of the reaction tank (2). A reaction chamber (40) is opened on the inner side of the wastewater reaction tank (4). A mixing mechanism is provided on the inner side of the reaction chamber (40). The mixing mechanism includes a spherical frame (6), a uniform aeration component, a clamping reinforcement component, and a scraping component. The uniform aeration assembly includes a fixed sleeve (61), a central conveying pipe (611), and a splitting balloon (612). The fixed sleeve (61) is provided in two sets and is fixedly installed on both sides of the spherical frame (6). The splitting balloon (612) penetrates the central inner wall of the central conveying pipe (611) and is connected to it. The outer surface of the central conveying pipe (611) is fixedly connected to the inner wall of the fixed sleeve (61), and the outer surface of the fixed sleeve (61) is rotatably connected to the inner wall of the wastewater reaction tank (4). A reinforcing strip (613) is fixedly connected to the outer ring surface of the ball-shaped body (612). A conveying branch pipe (614) is fixedly installed on both sides of the reinforcing strip (613). The input end of the conveying branch pipe (614) is connected to the annular inner wall of the ball-shaped body (612). Aeration holes are evenly opened on the inner surface of the conveying branch pipe (614). A threaded sleeve (624) is fixedly installed at the end of the conveying branch pipe (614) away from the ball-shaped body (612). The central conveying pipe (611), the ball-shaped body (612), the reinforcing strip (613) and the conveying branch pipe (614) work together to form a cross structure, which achieves uniform aeration in all directions while providing structural support to the inner circumference of the spherical frame (6). The clamp reinforcement assembly includes an arc-shaped clamp rod one (62) and an arc-shaped clamp rod two (621). The inner walls of the arc-shaped clamp rod one (62) and the arc-shaped clamp rod two (621) are provided with reserved grooves (622). A locking bolt (623) passes through the inner surface of the reserved groove (622). The outer surface of the locking bolt (623) is threaded to the inner surface of the threaded sleeve (624). After the arc-shaped support rod 1 (62) and arc-shaped support rod 2 (621) are assembled, they form a clamp for the spherical frame (6). The locking bolt (623) and the threaded sleeve (624) lock in both directions, increasing the clamp structure at the maximum diameter position of the spherical frame (6) and ensuring the overall support strength of the spherical frame (6).

2. The multi-stage treatment device for industrial heavy metal wastewater according to claim 1, characterized in that: The dosing mechanism includes an electric telescopic rod (51), a first sealing plate (52) and a second sealing plate (53). The outer surfaces of the first sealing plate (52) and the second sealing plate (53) are respectively fixedly connected to the inner wall of the dosing box (5). A closed medicine storage cavity is formed between the first sealing plate (52) and the second sealing plate (53). The inner side of the medicine storage cavity is evenly distributed with piston cylinders (54). The two ends of the piston cylinder (54) are respectively fixedly connected to the inner walls of the first sealing plate (52) and the second sealing plate (53). A piston member (541) is movably installed inside the piston cylinder (54). A liquid inlet hole is formed on the annular inner wall of the piston cylinder (54).

3. The multi-stage treatment device for industrial heavy metal wastewater according to claim 2, characterized in that: A sleeve plate (41) is fixedly installed on the lower outer surface of the wastewater reaction box body (4). Side plates (411) are respectively fixedly installed on both sides of the sleeve plate (41). A pressure pedal (414) is rotatably connected to the upper outer surface of the side plate (411). The pressure pedal (414) is in a "C"-shaped plate structure. A lining plate (412) is fixedly installed on one side of the sleeve plate (41) away from the side plate (411). A contact spring (413) is fixedly installed on the upper surface of the lining plate (412). The other end of the contact spring (413) is fixedly connected to the lower surface of the pressure pedal (414). A linkage push rod (512) is movably abutted against the upper end of the pressure pedal (414). The upper end of the linkage push rod (512) is fixedly connected to a lifting plate (511). The inner wall of one side of the lifting plate (511) is slidably connected to the inner surface of the dosing box (5). And an electric telescopic rod (51) is fixedly installed at the upper end of the lifting plate (511).

4. The multi-stage treatment device for industrial heavy metal wastewater according to claim 3, characterized in that: Pin shafts one (415) are fixedly installed on both sides of the pressure pedal (414). An active arm rod (416) is rotatably connected to the outer surface of the pin shaft one (415). A pin shaft two (417) is fixedly connected to one end of the active arm rod (416). A cam sleeve plate (418) is fixedly connected to the inner side of the pin shaft two (417). The pin shaft two (417) is eccentrically arranged with respect to the center of the cam sleeve plate (418).

5. A multi-stage treatment device for industrial heavy metal wastewater according to claim 4, characterized in that: The outer surface of the fixed sleeve (61) is fixedly connected to the inner wall of the cam sleeve plate (418).

6. A multi-stage treatment device for industrial heavy metal wastewater according to claim 1, characterized in that: Both the first arc-shaped holding rod (62) and the second arc-shaped holding rod (621) are in a "C"-shaped plate structure.

7. A multi-stage treatment device for industrial heavy metal wastewater according to claim 6, characterized in that: The scraping assembly includes a mounting strip (63), the inner side of which is provided with a fitting groove. The inner surface of the fitting groove fits and engages with the outer surfaces of the first arc-shaped retaining rod (62) and the second arc-shaped retaining rod (621). The inner surface of the mounting strip (63) is provided with a buffer groove (630). The bottom surface of the inner cavity of the buffer groove (630) is provided with a sliding groove (6301). The inner surface of the buffer groove (630) is movably connected to a cleaning strip mounting plate (631). A cleaning silicone strip (632) is fixedly installed on the outer side of the cleaning strip mounting plate (631). The outer surface of the cleaning silicone strip (632) is movably connected to the inner wall of the reaction chamber (40). A buffer is provided between the cleaning strip mounting plate (631) and the inner side of the buffer groove (630).

8. A multi-stage treatment device for industrial heavy metal wastewater according to claim 7, characterized in that: The buffer component includes an elastic abutment block (6311) and a retaining plate (6312). The elastic abutment block (6311) has an "A"-shaped block structure. Both ends of the elastic abutment block (6311) are fixedly connected to the bottom surface of the inner cavity of the buffer groove (630) and the bottom surface of the inner side of the cleaning strip mounting plate (631), respectively. One end of the retaining plate (6312) is rotatably connected to the outer surface of the elastic abutment block (6311), and the other end of the retaining plate (6312) is rotatably connected to an abutment roller (6). 313), the outer surfaces of both sides of the abutment plate (6312) are rotatably connected to the diagonal bracing rod (6314), and the other end of the diagonal bracing rod (6314) is movably connected to the slider (6315). The outer surface of the slider (6315) is slidably connected to the inner wall of the slide groove (6301). A telescopic abutment piece (6302) is fixedly connected to one side of the inner wall of the slide groove (6301), and the other end of the telescopic abutment piece (6302) is fixedly connected to the outer surface of the slider (6315).

9. A multi-stage treatment device for industrial heavy metal wastewater according to claim 1, characterized in that: The spherical frame (6) has a spherical through groove (60) evenly opened on the outer circumferential surface. An auxiliary shearing component is provided on the inner side of the spherical through groove (60). The auxiliary shearing component includes a spherical insert (64). The spherical insert (64) is fixedly installed on the inner side of the spherical through groove (60) and adapted to be connected thereto. An adapter strip (641) is fixedly installed on the inner surface of the spherical insert (64).

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