Multi-stage treatment device for industrial heavy metal wastewater

Abstract

The invention 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 formed by combining a sedimentation tank, a reaction tank and a residue filtering tank, a dosing tank is fixedly mounted at the upper end of the reaction tank, and a dosing mechanism is arranged on the inner side of the dosing tank. The chemical feeding mechanism is combined with the mixing mechanism, so that the dynamic mixing of mixed liquid in the reaction cavity is ensured while intermittent chemical feeding during industrial wastewater reaction is realized, and the heavy metal precipitation reaction efficiency is improved; the aeration assembly is combined with the spherical frame, so that uniform aeration is realized, and meanwhile, the supporting strength of the whole structure of the spherical frame is ensured; by arranging the hoop reinforcing assembly, the spherical frame is hooped, so that the overall structure is reinforced, the hoop reinforcing assembly is combined with the uniform aeration assembly, the bidirectional locking effect of the spherical frame and the uniform aeration assembly is achieved, the waste water mixing and stirring effect is achieved, and multiple purposes are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a multi-stage treatment device for industrial heavy metal wastewater. Background Art

[0002] With the rapid development of non-ferrous metal smelting, electroplating, chemical and other industries, the problem of heavy metal pollution in industrial wastewater is becoming increasingly serious. Heavy metals (such as copper, nickel, lead, cadmium, etc.) are non-degradable, bioaccumulative and highly toxic. Once they enter the water body, they will be enriched through the food chain, posing a serious threat to the ecological environment and human health. As the discharge of heavy metal wastewater continues to grow, traditional treatment technologies have 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 the prior art, such as the integrated sewage treatment equipment with publication number CN218262199U, the first motor is started to rotate the stirring shaft during use, and the stirring shaft drives the bottom stirring paddle to rotate so that the stirring paddle forms an upward-pushing vortex, thereby accelerating the rising rate of the bottom bubbles. At the same time, the stirring shaft drives the first bevel gear to rotate, and under the meshing action, the second bevel gear drives the stirring rod to rotate synchronously so as to drive the dispersion net to disperse and refine the rising bubbles to expand the diffusion range of the bubbles. At the same time, the defoaming plate and the defoaming thorns are used to facilitate the puncture of the diffused bubbles so that they can fully contact with the sewage, thereby effectively improving the aeration effect of the sewage.

[0004] In order to solve the problem of the relatively simple aeration structure in the existing integrated sewage treatment equipment, the above document adopts the method of accelerating the rising rate of the bottom bubbles;

[0005] However, in actual use, tiny bubbles are introduced into the suspended matter system and interact with the suspended matter in a complex manner during the rising process. As the bubbles continue to float up, their surfaces gradually adsorb and accumulate various components in the surrounding suspended matter. The originally tiny bubbles gradually gather and merge, eventually forming larger bubbles, which affect the mixing effect of the agent and wastewater, and are prone to form fluid short circuits or dead zones during the reaction, resulting in insufficient contact between the agent and wastewater, affecting the heavy metal removal rate.

[0006] Therefore, the present invention proposes a multi-stage treatment device for industrial heavy metal wastewater to solve the problem that the wastewater and reagents in the existing reaction pool cannot achieve uniform distribution of reagents and aeration during the reaction, and there is a mixing dead zone, which makes it difficult to completely separate heavy metals and impurities in the wastewater. Summary of the Invention

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

[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 arranged 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 to 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 to the inner walls of the sealing plate one and the sealing plate two. A piston part is movably installed inside the piston cylinder, and a liquid inlet hole is arranged on the annular inner wall of the piston cylinder.

[0010] Preferably, a sleeve plate is fixedly installed on the outer surface of the lower side 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 "C"-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 to 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 to a lifting plate. The inner wall of one side of the lifting plate is slidably connected to 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 to a pin shaft two. The pin shaft two is fixedly connected to the inner side of a cam sleeve plate. The pin shaft two is eccentrically arranged with respect to the center of the cam sleeve plate.

[0012] Preferably, the uniform aeration component includes fixed sleeves, a central conveying circular pipe and a sub-balloon body. 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 to the inner wall of the cam sleeve plate. The sub-balloon body 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 to the inner wall of the fixed sleeve, and the outer surface of the fixed sleeve is respectively rotatably connected to the inner wall of the wastewater reaction box body.

[0013] Preferably, a reinforcement strip is fixedly connected to the outer ring surface of the dividing ball, and delivery branches are fixedly installed on both sides of the reinforcement strip. The input end of the delivery branch is through-connected with the annular inner wall of the dividing ball, and aeration holes are evenly opened on the inner surface of the delivery branch. A threaded sleeve is fixedly installed on the end of the delivery branch away from the dividing ball.

[0014] Preferably, the clamp reinforcement assembly includes an arc-shaped holding rod 1 and an arc-shaped holding rod 2, and the arc-shaped holding rod 1 and the arc-shaped holding rod 2 are both "C"-shaped plate structures. A reserved groove is opened on the central inner wall of the arc-shaped holding rod 1 and the arc-shaped holding rod 2, and a locking bolt passes through the inner surface of the reserved groove, and the outer surface of the locking bolt is threadedly adapted to the inner surface of the threaded sleeve.

[0015] Preferably, the scraping assembly includes a card-mounted strip plate, the inner side of the card-mounted strip plate is provided with a fitting groove, the inner surface of the fitting groove is fitted and engaged with the outer surface of the arc-shaped holding rod 1 and the arc-shaped holding rod 2, the inner surface of the card-mounted strip plate is provided with a buffer groove, the bottom surface of the inner cavity of the buffer groove is provided with a slide groove, the inner surface of the buffer groove is movably connected to a cleaning strip mounting plate, the outer side of the cleaning strip mounting plate is fixedly installed with a cleaning silicon strip, the outer surface of the cleaning silicon strip is movably connected to the inner wall of the reaction chamber, and a buffer part is provided between the cleaning strip mounting plate and the inner side of the buffer groove.

[0016] Preferably, the buffer member includes an elastic block and a supporting plate, the elastic block is an A-shaped block structure, the two ends of the elastic block are respectively fixedly connected to the inner cavity bottom surface of the buffer groove and the inner bottom surface of the cleaning strip mounting plate, one end of the supporting plate is rotatably connected to the outer surface of the elastic block, the other end of the supporting plate is rotatably connected to the supporting roller, the outer surfaces of both sides of the supporting plate are rotatably connected to the diagonal support rod, the other end of the diagonal support rod is movably connected to a slider, the outer surface of the slider is slidably connected to the inner wall of the slide groove, a telescopic support piece is fixedly connected to the inner wall of one side of the slide groove, and the other end of the telescopic support piece is fixedly connected to the outer surface of the slider.

[0017] Preferably, spherical grooves are evenly opened on the outer circumferential surface of the spherical rack, and an auxiliary shearing component is provided on the inner side of the spherical groove. The auxiliary shearing component includes a spherical embedded rack, which is fixedly installed on the inner side of the spherical groove and adapted to be connected thereto, and an adaptor strip is fixedly installed on the inner surface of the spherical embedded rack.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention proposes a multi-stage treatment device for industrial heavy metal wastewater, which combines a dosing mechanism with a mixing mechanism to achieve intermittent dosing of reagents during the reaction of industrial wastewater while ensuring dynamic mixing of the mixed liquid in the reaction chamber, thereby improving the efficiency of the heavy metal precipitation reaction; by combining the aeration component with the spherical frame, uniform aeration is achieved while ensuring the supporting strength of the overall structure of the spherical frame; by using the setting of the clamp reinforcement component, a clamp is formed on the spherical frame, which not only strengthens the overall structure, but also combines with the uniform aeration component to play a bidirectional locking role of the two, and also achieves the mixing and stirring effect of the wastewater, realizing multiple uses of one item. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the local cross-section structure;

[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the front half-section structure;

[0025] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0026] Figure 7 For the present invention Figure 3 Schematic diagram of the structure of the wastewater reaction box and the drug feeding box;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the mixing 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 of the disassembled structure of the uniform exposure assembly and the clamp reinforcement assembly of the present invention;

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

[0031] Figure 12 For the present invention Figure 11 A schematic diagram of the enlarged structure at point B;

[0032] Figure 13 For the present invention Figure 11 Enlarged structural diagram at C.

[0033] In the figure: 1. sedimentation tank; 11. clean water outlet; 12. sludge outlet; 13. wastewater pipe 1; 14. wastewater pipe 2; 15. wastewater outlet pipe; 2. reaction tank; 3. filter residue tank; 4. wastewater reaction box; 40. reaction chamber; 41. set plate; 411. side plate; 412. lining plate; 413. contact spring; 414. pressure pedal; 415. pin 1; 416. movable arm; 417. pin 2; 418. cam sleeve; 5. medicine feeding box; 51. electric telescopic rod; 511. lifting plate; 512. linkage push rod; 52. sealing plate 1; 53. sealing plate 2; 54. piston cylinder; 541. piston member; 6. spherical frame; 60. spherical groove; 600. connecting block; 61. fixed sleeve; 611. Central conveying circular tube; 612, dividing ball; 613, reinforcement bar; 614, conveying branch pipe; 62, arc-shaped holding rod 1; 621, arc-shaped holding rod 2; 622, reserved groove; 623, locking bolt; 624, threaded sleeve; 63, clamping strip plate; 630, buffer groove; 6301, slide; 631, cleaning strip mounting plate; 632, cleaning silicon strip; 6311, elastic block; 6312, holding plate; 6313, contact roller; 6314, diagonal support rod; 6315, slider; 6302, telescopic block; 633, convex plate; 6331, limiting sleeve; 6332, elastic wire; 6333, sliding support rod; 6334, guide wheel; 64, spherical inlaid frame; 641, adapter strip; 65, support column; 651, scooping trough. DETAILED DESCRIPTION

[0034] In order to clearly and completely describe the objectives and technical solutions of the present invention and make its advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] For example 1, please refer to Figure 1-13The 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. The upper end of the filter residue tank 3 is provided with a wastewater input opening, and a filter residue grid is movably installed on the inner side of the filter residue tank 3 to intercept large metal debris, plastic, etc. A wastewater outlet pipe 15 is provided on the lower inner wall of the filter residue tank 3, and the side of the filter residue tank 3 away from the wastewater outlet pipe 15 is sealed and connected with a wastewater through pipe 2 14 that passes through the inner side of the reaction tank 2. The reaction tank 2 is in the biological treatment stage to realize the separation of metal ions and sludge in industrial wastewater. The sedimentation tank 1 is used for sludge sedimentation treatment after separation, and the separation of biological sludge and supernatant is realized by gravity sedimentation. A clean water outlet 11 and a sludge outlet 12 are respectively sealed and connected. A wastewater through-pipe 13 is connected between the sedimentation tank 1 and the reaction tank 2 to guide the mixed wastewater and discharge it into the interior of the sedimentation tank 1 for sedimentation treatment, wherein the clean water outlet 11 is used for discharging the supernatant, and the sludge outlet 12 is used for discharging the sludge. A drug feeding box 5 is fixedly installed on the upper end of the reaction tank 2, and a drug feeding mechanism is provided on the inner side of the drug feeding box 5. A wastewater reaction box 4 is fixedly installed on the inner side of the reaction tank 2, and an aeration chamber is provided between the outer side of the wastewater reaction box 4 and the inner side of the reaction tank 2. The aeration chamber is in a "U"-shaped structure. A reaction chamber 40 is opened on the inner side of the wastewater reaction box 4, and a mixing mechanism is provided inside the reaction chamber 40. The mixing mechanism includes a spherical rack 6, a uniform exposure component, a hoop reinforcement component and a scraping component;

[0036] In this embodiment, a dosing mechanism is combined with a mixing mechanism to achieve intermittent dosing of reagents during the reaction of industrial wastewater while ensuring dynamic mixing of the mixed liquid in the reaction chamber 40, thereby improving the efficiency of the heavy metal precipitation reaction; by combining the aeration component with the spherical rack 6, uniform aeration is achieved while ensuring the overall structural support strength of the spherical rack 6; by using the setting of the clamp reinforcement component, a clamp is formed on the spherical rack 6, which not only strengthens the overall structure, but also combines with the uniform aeration component to play a two-way locking role, and also achieves the mixing and stirring effect of the wastewater, realizing multiple uses of one item.

[0037] Example 2, refer to the attached Figure 1-13, on the basis of Embodiment 1, in order to achieve the linkage rotation of the mixing mechanism while intermittently and dispersedly adding the medicament: 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 formed on the annular inner wall of the piston cylinder 54; Specifically, medicaments such as sodium hydroxide and sodium sulfide can be added to form hydroxide or sulfide precipitates of heavy metal ions; A sleeve plate 41 is fixedly installed on the lower outer surface of the wastewater reaction tank 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 Bracket 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 with respect to the center of the cam sleeve plate 418; The uniform aeration component includes a fixed sleeve 61, a central delivery circular pipe 611 and a ballooning 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 ballooning body 612 penetrates through the central inner wall of the central delivery circular pipe 611 and is connected to it in a through manner. The outer surface of the central delivery 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 tank body 4;

[0038] In this embodiment, when it is necessary to add medicine to the medicine storage cavity formed by sealing plate 1 52 and sealing plate 2 53, the electric telescopic rod 51 is controlled to extend and retract to realize the vertical movement of the lifting plate 511, thereby driving the synchronous movement of multiple groups of piston members 541. When the piston part of the piston member 541 is lifted and staggered with the preset liquid inlet hole on the piston cylinder 54, the mixed medicine flows in through the liquid inlet hole and is finally output through the bottom of the piston cylinder 54 and enters the reaction chamber 40 to realize the dispersed addition of the medicine. Through such a setting, the addition of the medicine in a single direction can be avoided, and the uniformity of the dispersion of the medicine 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 aligned with the reaction chamber 40. The upper inner wall of the reaction pool 2 is slidably connected, and the reaction pool 2 is used to limit the vertical movement of the linkage push rod 512. During the lifting and lowering process of the linkage push rod 512, the bottom end of the linkage push rod 512 contacts the upper surface of the pressure pedal 414. When the pressure pedal 414 is pressed down, the abutment spring 413 is pushed downward to generate compression. When the pressure pedal 414 is lifted, the abutment spring 413 assists the pressure pedal 414 to reset, and cooperates with the connection between the movable arm rod 416 and the cam sleeve plate 418 to drive the movable arm rod 416 to make a circular motion around the center of the fixed sleeve 61, thereby realizing the overall rotation of the spherical frame 6. While realizing the intermittent dispersed addition of the medicine through a power source, it also ensures the linkage rotation of the mixing mechanism, achieving two effects synchronously by one mechanism.

[0039] Example 3, refer to the attached Figure 1-13 On the basis of the second embodiment, in order to achieve full mixing of the reagent and the wastewater during the reaction in the reaction chamber 40 and uniform aeration at the same time, and reduce the surface area of the floating bubbles: the outer ring surface of the separator 612 is fixedly connected with a reinforcing strip 613, and the two sides of the reinforcing strip 613 are fixedly installed with a delivery branch pipe 614. The input end of the delivery branch pipe 614 is connected to the annular inner wall of the separator 612, and aeration holes are evenly opened on the inner surface of the delivery branch pipe 614. A threaded sleeve 624 is fixedly installed at the end of the delivery branch pipe 614 away from the separator 612; the clamp reinforcement component includes an arc-shaped clamp Pole 1 62 and curved pole 2 621, both of which have a C-shaped plate structure, have a reserved groove 622 defined on their central inner walls. A locking bolt 623 extends through the inner surface of the reserved groove 622, the outer surface of which is threadedly engaged with the inner surface of a threaded sleeve 624. A connecting block 600 is fixedly mounted on one side of the spherical bracket 6, which is relatively away from the reserved groove 622. The outer surface of the connecting block 600 is adapted to engage with the connecting ends of curved pole 1 62 and curved pole 2 621, respectively.

[0040] In this embodiment, before the mixing operation of the reagent and the industrial wastewater is carried out, the arc holding rod 1 62 and the arc holding rod 2 621 are assembled. When the ends of the two are butted, they are adapted to fit with the connecting block 600, and at this time, the arc holding rod 1 62 and the arc holding rod 2 621 form a clamp for the spherical frame 6, and at this time, the through-setting of the locking bolt 623 is used to realize bidirectional locking with the threaded sleeve 624. Through such a design, the clamp structure at the maximum diameter position of the spherical frame 6 is increased, thereby ensuring the overall structure of the spherical frame 6. The supporting strength of the structure improves the stability of the spherical frame 6 during mixing operations; at the same time, the installation of the arc-shaped holding rod 62 synchronously ensures the stability of the distribution of multiple groups of delivery branches 614, and the central delivery circular pipe 611, the distribution ball 612, the reinforcement strip 613 and the delivery branch pipe 614 work together to form a cross structure, which not only achieves uniform aeration in all directions, but also provides structural support for the inner periphery of the spherical frame 6. In this way, the structure of the outer and inner peripheries of 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 rotates as a whole through the joint swing of the movable arm 416, the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621 here can also serve as mixing parts for the mixed wastewater, accelerating the shearing of bubbles, preventing the bubbles from floating up and growing larger, and affecting the effect of removing oil stains in the upper suspended matter.

[0042] Example 4, refer to the attached Figure 1-13On the basis of the third embodiment, in order to achieve sufficient mixing of the wastewater in the reaction chamber 40 and avoid the existence of a mixing dead zone, where the sludge settles at the bottom and is difficult to react: the scraping assembly includes a card-mounted strip plate 63, the inner side of the card-mounted strip plate 63 is provided with a fitting groove, the inner surface of the fitting groove is fitted and engaged with the outer surface of the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621, the inner surface of the card-mounted strip plate 63 is provided with a buffer groove 630, the inner bottom surface of the buffer groove 630 is provided with a slide groove 6301, the inner surface of the buffer groove 630 is movably connected with a cleaning strip mounting plate 631, and the cleaning strip A cleaning silicon strip 632 is fixedly mounted on the outside of the mounting plate 631. The outer surface of the cleaning silicon 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 comprises an elastic stop block 6311 and a holding plate 6312. The elastic stop block 6311 is an "A"-shaped block structure. The two ends of the elastic stop block 6311 are respectively fixedly connected to the inner cavity bottom surface of the buffer groove 630 and the inner bottom surface of the cleaning strip mounting plate 631. One end of the holding plate 6312 is rotatably connected to the outer surface of the elastic stop block 6311. The other end of the abutting plate 6312 is rotatably connected to the abutting roller 6313, and the outer surfaces of both sides of the abutting plate 6312 are rotatably connected to the diagonal support rod 6314. The other end of the diagonal support 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 6302 is fixedly connected to the inner wall of one side of the slide groove 6301. The other end of the telescopic abutment 6302 is fixedly connected to the outer surface of the slider 6315. The outer surfaces of both sides of the clamping strip 63 are fixedly installed with convex plates 633. The convex plates 633 A limiting sleeve 6331 is fixedly mounted on the lower surface of the limiting sleeve 6331. An elastic wire 6332 is fixedly connected to the bottom surface of the inner cavity of the limiting sleeve 6331. The other end of the elastic wire 6332 is fixedly connected to a sliding support rod 6333. 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 protruding plate 633. The end of the sliding support rod 6333 away from the elastic wire 6332 is rotatably connected to a guide wheel 6334. The outer surface of the guide wheel 6334 is movably connected to the side wall of the reaction chamber 40.

[0043] In this embodiment, the scraping assembly as a whole can be assembled with the spherical frame 6 by adapting and fitting the connecting block 600 with the fitting groove on the inner side of the snap-fitting strip 63. On the other hand, when the snap-fitting strip 63 is installed as a whole, the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621 can also be fastened at their assembly ends. This not only realizes the installation of the scraping assembly on the spherical frame 6, but also simultaneously realizes the fastening of the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621 at their assembly ends, ensuring the four-point limit of the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621 when they are installed with the spherical frame 6, further increasing the installation strength.

[0044] When the spherical frame 6 rotates under the linkage action, the scraping assembly moves synchronously and fits against the side wall of the reaction chamber 40. Specifically, the cleaning silicon strip 632 contacts the side wall of the reaction chamber 40. By setting the buffer member, the degree to which the cleaning strip mounting plate 631 extends out of the clamping strip plate 63 can be adjusted according to the change in the inner diameter of the reaction chamber 40. On the other hand, when the cleaning silicon 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 abutting plate 6312 are squeezed by the cleaning strip mounting plate 631. The angle of the scraper 6302 changes, and the scraper 6302 rotates to the side away from the elastic stop block 6311. At the same time, the angle of the diagonal support rod 6314 changes, and the slider 6315 slides outward. In this way, the telescopic stop 6302 is compressed, which can not only ensure the adaptive fit of the cleaning silicon strip 632 and the side wall of the reaction chamber 40, but also realize the squeezing and buffering of the cleaning strip mounting plate 631. It is worth noting that the scraper assembly here can not only scrape off sediment and side dirt, but also provide auxiliary stirring for the mixed wastewater, and can also enhance the installation strength of the arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621, achieving a multi-purpose effect.

[0045] In addition, it should be noted that adaptive guide wheels 6334 are connected on both sides of the card-mounted strip 63 to further ensure the stability of the scraping component when it is in motion, ensure smooth movement, and avoid jamming.

[0046] Example 5, refer to the attached Figure 1-13 On the basis of the fourth embodiment, in order to realize the auxiliary shearing of the floating bubbles in the mixed wastewater, the present embodiment adds an auxiliary shearing component and an auxiliary lifting component: spherical grooves 60 are evenly opened on the outer circumferential surface of the spherical frame 6, and an auxiliary shearing component is provided on the inner side of the spherical groove 60. The auxiliary shearing component includes a spherical embedded frame 64, which is fixedly mounted on the inner side of the spherical groove 60 and adapted to be connected thereto. An adaptor strip 641 is fixedly mounted on the inner surface of the spherical embedded frame 64; an auxiliary lifting component is provided on the inner side of the spherical embedded frame 64, and the auxiliary lifting component includes a support column 65 and a scooping trough 651. The support column 65 is fixedly mounted on both ends of the spherical embedded frame 64, and one outer end of the support column 65 is fixedly connected to a pin shaft three, and the outer surface of the pin shaft three is movably connected to both ends of the scooping trough 651.

[0047] In this embodiment, the overall structure of the spherical rack 6 is optimized, and multiple sets of spherical embedded racks 64 are adapted to be installed at the position of the spherical groove 60. The setting of the adapter strip 641 can realize the shearing of bubbles in the mixed wastewater, avoid the increase in the surface area of the floating bubbles, and form a situation where the metal oil film in the industrial wastewater is difficult to dissolve. In conjunction with the design of the support column 65 and the scooping trough 651, the support column 65 can support the scooping trough 651, and on the other hand, it can also realize auxiliary stirring of the wastewater. In addition, the scooping trough 651 is connected to the support column 65 by the pin shaft three. Under the action of gravity of the scooping trough 651, the wastewater can be scooped up and lifted back and forth, and the wastewater can fall in a parabolic shape, thereby accelerating the separation of heavy metal ions and sludge in the wastewater.

[0048] Example 6, refer to the attached Figure 1-13 Based on the fifth embodiment, the present invention further 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: The industrial heavy metal wastewater is fed into the integrated wastewater treatment tank through the upper opening of the filter residue pool 3. The wastewater first passes through the filter residue grid inside the filter residue pool 3 to intercept large metal debris, plastic and other solid impurities, achieving preliminary filtration. The filtered wastewater passes through the wastewater outlet pipe 15 on the lower inner wall of the filter residue pool 3 and the wastewater through pipe 2 14 that passes through the inside of the reaction tank 2, and enters the biological treatment stage reaction tank 2 to prepare for subsequent metal ion and sludge separation treatment;

[0050] Step 2: Intermittent dosing and mixing reaction of reagents: Sodium hydroxide, sodium sulfide and other reagents are pre-loaded in the closed drug storage cavity formed between the sealing plate 1 52 and the sealing plate 2 53 of the dosing mechanism to react with the heavy metal ions in the wastewater to form hydroxide or sulfide precipitation. The electric telescopic rod 51 is controlled to extend and retract, driving the lifting plate 511 to move vertically, thereby lifting the piston part 541 and staggering it with the preset liquid inlet hole on the piston cylinder 54. The mixed reagent flows in through the liquid inlet hole and is finally output from the bottom of the piston cylinder 54 to enter the reaction chamber 40 to achieve dispersed dosing of the reagent, ensuring the uniformity of dispersion of the reagent and industrial wastewater. While the reagent is being added, the spherical frame 6 of the mixing mechanism rotates under the linkage action of the linkage push rod 512 and the pressure pedal 414. The dynamic mixing of the mixed liquid in the reaction chamber 40 is ensured by the mixing mechanism in the spherical frame 6, thereby improving the efficiency of the heavy metal precipitation reaction.

[0051] Step 3: Uniform aeration and structural reinforcement: The aeration component uniformly aerates the reaction chamber 40 through the aeration chamber of the "U"-shaped structure, forming a micro-bubble diffusion flow pattern and enhancing the gas-liquid mass transfer efficiency. The arc-shaped holding rod 1 62 and the arc-shaped holding rod 2 621 are assembled to form a clamp for the spherical frame 6. The bidirectional locking of the locking bolt 623 and the threaded sleeve 624 increases the clamp structure at the maximum diameter position of the spherical frame 6, ensuring the support strength of the overall structure of the spherical frame 6 and improving the stability during the mixing operation. The uniform aeration component and the clamp reinforcement component work together to form a cross structure, which achieves uniform aeration in all directions while providing structural support to the inner periphery of the spherical frame 6 to ensure the stability of wastewater treatment.

[0052] Step 4: Fully mix, scrape and assist in shearing and lifting of wastewater: Through the rotation of the spherical frame 6, the aeration of the uniform exposure component and the stirring of the clamp reinforcement component, the wastewater in the reaction chamber 40 is fully mixed to avoid mixing dead zones and ensure that the sludge and the metal ions in the wastewater are fully contacted and reacted. The scraping component moves synchronously when the spherical frame 6 rotates, fits with the side wall of the reaction chamber 40, scrapes off sediment and side dirt, and uses the buffer to achieve adaptive fit with the change in the inner diameter of the reaction chamber 40 to ensure the scraping effect. The auxiliary shearing component spherical embedded frame 64 shears the floating bubbles in the mixed wastewater through the adapter strip 641 to avoid the increase in the surface area of the bubbles affecting the treatment effect; the support column 65 and the scooping trough 651 are connected by three pins to achieve auxiliary stirring and reciprocating scooping of the wastewater, accelerate the separation of heavy metal ions and sludge in the wastewater, and improve the treatment efficiency.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention 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 residue tank (3), and is characterized in that: A dosing tank (5) is fixedly installed at the upper end of the reaction tank (2). A dosing mechanism is arranged inside the dosing tank (5). A wastewater reaction box body (4) is fixedly installed inside the reaction tank (2). An aeration chamber is arranged between the outer side of the wastewater reaction box body (4) and the inner side of the reaction tank (2). A reaction chamber (40) is arranged inside the wastewater reaction box body (4). A mixing mechanism is arranged inside the reaction chamber (40). The mixing mechanism includes a spherical frame (6), a uniform aeration component, a hoop reinforcement component and a scraping component.

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 with 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 (s3). The piston cylinders (54) are evenly distributed inside the medicine storage cavity. The two ends of the piston cylinder (54) are respectively fixedly connected with 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 arranged 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 "U"-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 with 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 with a lifting plate (511). The inner wall of one side of the lifting plate (511) is slidably connected with 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).

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 inside 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. The multi-stage treatment device for industrial heavy metal wastewater according to claim 4, characterized in that: The uniform exposure assembly comprises a fixed sleeve (61), a central conveying circular tube (611) and a distribution ball (612). The fixed sleeve (61) is provided in two groups and is fixedly mounted 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 (418). The distribution ball (612) penetrates the central inner wall of the central conveying circular tube (611) and is connected thereto. The outer surface of the central conveying circular tube (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 box (4).

6. The multi-stage treatment device for industrial heavy metal wastewater according to claim 5, characterized in that: The outer ring surface of the distribution sphere (612) is fixedly connected with a reinforcement strip (613), and delivery branches (614) are fixedly installed on both sides of the reinforcement strip (613). The input end of the delivery branch pipe (614) is connected to the annular inner wall of the distribution sphere (612). Aeration holes are evenly opened on the inner surface of the delivery branch pipe (614), and a threaded sleeve (624) is fixedly installed on the end of the delivery branch pipe (614) away from the distribution sphere (612).

7. The multi-stage treatment device for industrial heavy metal wastewater according to claim 6, characterized in that: The hoop reinforcement assembly includes an arc-shaped holding rod (62) and an arc-shaped holding rod (621), and the arc-shaped holding rod (62) and the arc-shaped holding rod (621) are both "C"-shaped plate structures. A reserved groove (622) is opened on the central inner wall of the arc-shaped holding rod (62) and the arc-shaped holding rod (621), and a locking bolt (623) passes through the inner surface of the reserved groove (622). The outer surface of the locking bolt (623) is threadedly adapted to the inner surface of the threaded sleeve (624).

8. The multi-stage treatment device for industrial heavy metal wastewater according to claim 7, characterized in that: The scraping assembly includes a card-mounted strip plate (63), the inner side of the card-mounted strip plate (63) is provided with a fitting groove, the inner surface of the fitting groove is fitted and engaged with the outer surface of the arc-shaped holding rod (62) and the arc-shaped holding rod (621), the inner surface of the card-mounted strip plate (63) is provided with a buffer groove (630), the inner cavity bottom surface of the buffer groove (630) is provided with a slide groove (6301), the inner surface of the buffer groove (630) is movably connected with a cleaning strip mounting plate (631), the outer side of the cleaning strip mounting plate (631) is fixedly installed with a cleaning silicon strip (632), the outer surface of the cleaning silicon strip (632) is movably connected to the inner wall of the reaction chamber (40), and a buffer member is provided between the cleaning strip mounting plate (631) and the inner side of the buffer groove (630).

9. The multi-stage treatment device for industrial heavy metal wastewater according to claim 8, characterized in that: The buffer member comprises an elastic block (6311) and a supporting plate (6312), wherein the elastic block (6311) is an "A"-shaped block structure, and the two ends of the elastic block (6311) are fixedly connected to the inner cavity bottom surface of the buffer groove (630) and the inner bottom surface of the cleaning strip mounting plate (631), respectively; one end of the supporting plate (6312) is rotatably connected to the outer surface of the elastic block (6311), and the other end of the supporting plate (6312) is rotatably connected to the contact roller (6312). 313), the outer surfaces of both sides of the supporting plate (6312) are rotatably connected with an oblique support rod (6314), the other end of the oblique support rod (6314) is movably connected with a slider (6315), the outer surface of the slider (6315) is slidably connected to the inner wall of the slide groove (6301), and a telescopic supporting piece (6302) is fixedly connected to the inner wall of one side of the slide groove (6301), and the other end of the telescopic supporting piece (6302) is fixedly connected to the outer surface of the slider (6315).

10. The multi-stage treatment device for industrial heavy metal wastewater according to claim 1, characterized in that: Spherical grooves (60) are evenly formed on the outer circumferential surface of the spherical frame (6), and an auxiliary shearing assembly is provided on the inner side of the spherical groove (60). The auxiliary shearing assembly includes a spherical embedded frame (64), and the spherical embedded frame (64) is fixedly installed on the inner side of the spherical groove (60) and is adaptively connected thereto. An adapting strip (641) is fixedly installed on the inner surface of the spherical embedded frame (64).

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