A recycling device for treating shoe factory wastewater

Abstract

The application relates to the technical field of wastewater treatment, and particularly discloses a recycling equipment for treating shoe factory wastewater, which comprises a dosing pool, a pump air assembly, a tank body and a rotary spraying mechanism, the pump air assembly comprises a hollow rod longitudinally arranged in the dosing pool, the tank body is sleeved outside the hollow rod and longitudinally slidably connected with the hollow rod, the inside of the tank body is hollow and is provided with an annular baffle, so that the inside space of the tank body is divided into a mixing cavity and a discharging cavity, the rotary spraying mechanism comprises a lifting plate and a rotating plate, the lifting plate is longitudinally slidably arranged in the mixing cavity, the rotating plate is rotationally arranged at a position corresponding to the discharging cavity on the outer circumferential side of the tank body, and a discharging port is arranged on the rotating plate; the pre-mixing of the medicament is realized through the submerged tank body, the upward movement of the lifting plate realizes liquid discharging and self-cleaning, and the three-dimensional diffusion of the medicament is realized through cooperation of rotary spraying and airflow disturbance, so that the equipment has the advantages of rapid medicament adding reaction, uniform mixing and no dead angle.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a recycling device for treating wastewater from shoe factories. Background Technology

[0002] In the shoe manufacturing process, dyes and pigments are typically used to color shoe materials to improve their hardness, durability, and aesthetics. However, these dyes and pigments often remain in the water during the dyeing process, resulting in dye-contaminated wastewater. Directly discharging this wastewater into rivers, oceans, or other bodies of water can cause widespread water pollution. Therefore, to achieve compliant discharge or reclaimed water reuse, shoe factory wastewater treatment usually employs a combined process of "bar screen pretreatment + equalization tank + physicochemical sedimentation + biological treatment + deep filtration." Among these, the addition and mixing of chemicals in the physicochemical treatment stage is a crucial factor determining the load of subsequent biological treatment and the final effluent quality.

[0003] Chinese patent document CN117682730B discloses a water treatment method and apparatus, including a dosing tank, a dosing assembly, and a feedback control system; it also includes an external dispersion assembly for dispersing the agent outside the dosing tank and storage tank; and an anti-escape assembly installed on the storage tank. By combining the external dispersion assembly and the anti-escape assembly, on the one hand, airflow drives the dry powder agent to quickly disperse and diffuse in the air, enhancing the ease of agent dispersion; combined with uniformly distributed water mist, the agent and water mist are pre-mixed, reducing the probability of agglomeration when the agent is mixed with water. On the other hand, the uniformly sprayed water mist controls the diffusion range of the dry powder agent, allowing it to quickly settle into the dosing tank after diffusion, preventing the agent from dispersing into the environment outside the dosing tank.

[0004] The aforementioned device achieves gas-solid premixing and water mist capture of dry powder reagents before they enter the dosing tank, effectively preventing dust from escaping into the environment. However, it is essentially still a surface dosing method, with the reagents relying on gravity and water flow to slowly settle. In deeper dosing tanks, this method is prone to causing vertical stratification of the reagents: excessively high surface concentrations lead to waste, while insufficient reagent concentrations in the core contaminated areas (lower and middle layers) result in low overall reaction efficiency. Summary of the Invention

[0005] This invention provides a recycling device for treating wastewater from shoe factories, aiming to solve the problem that in related technologies, when adding reagents, the reagents are easily layered in the vertical direction: the surface concentration is too high, leading to waste, while the reagent concentration in the core polluted area (middle and lower layer) is insufficient, resulting in low overall reaction efficiency.

[0006] A recycling device for treating wastewater from a shoe factory includes a dosing tank, a pump assembly, a tank, and a rotary spraying mechanism. The air pump assembly includes a hollow rod arranged longitudinally in the dosing tank. The hollow rod has a hollow structure inside, forming an airflow channel. The lower end of the hollow rod is open. The tank body is fitted on the outside of the hollow rod and slides longitudinally with the hollow rod. The inside of the tank body is hollow and equipped with an annular baffle, which divides the internal space of the tank body into a mixing chamber located on the inside and a discharge chamber located on the outside. The lower end of the annular baffle is connected to the bottom of the tank body, and the upper end is left with a gap between it and the top of the tank body to form an overflow port. The top of the tank body is equipped with a water inlet and a chemical inlet that connect to the mixing chamber. The rotary spraying mechanism includes a lifting plate and a rotating plate. The lifting plate is longitudinally slidably installed in the mixing chamber. When the lifting plate moves upward, it can push the material in the mixing chamber into the discharge chamber through the overflow port. A stirring rod is installed in the mixing chamber. The stirring rod has an inclined extending stirring state and a vertically retracted avoidance state. The rotating plate is rotatably installed on the outer periphery of the tank corresponding to the discharge chamber. A discharge port is opened on the rotating plate. When the rotating plate rotates, it can spray the material in the discharge chamber into the dosing tank. The tank is also equipped with an adjustment component for changing the effective spray cross-sectional area of ​​the discharge port.

[0007] Its effects are as follows: When wastewater needs to be treated, clean water and chemicals are injected into the tank, and then the tank is driven to sink to the bottom of the dosing tank. During this process, the chemicals are pre-mixed by the stirring rod inside the tank. After mixing, the tank is driven to move upward, and during this process, the lifting plate is driven to move upward, pushing the mixed chemicals in the mixing chamber into the discharge chamber through the overflow port. Then, by rotating the rotating plate, the chemicals in the discharge chamber are sprayed into the dosing tank through the discharge port. The effective spray cross-sectional area of ​​the discharge port is changed by the adjustment component to enhance the penetration ability of the chemicals into the sludge. At the same time, the external air pump continuously supplies air to the hollow rod, generating a large number of high-pressure rising bubbles at the bottom of the dosing tank, which quickly encapsulate the chemicals to various depths of the water body, realizing the three-dimensional diffusion of the chemicals.

[0008] Preferably, the adjusting component includes multiple bosses connected end-to-end along the circumferential direction. Each boss is fixedly connected to the tank body and suspended above the outer periphery of the rotating plate. The lower end face of each boss is a slope, which gradually inclines from bottom to top along the rotation direction of the rotating plate. The discharge port is located within the coverage trajectory of the boss. By rotating the plate, the discharge port can periodically move to different height areas of the boss, thereby changing the effective spray cross-sectional area of ​​the discharge port. The effect is that, through the slope design of the lower end face of the boss, not only can a high-pressure jet be generated during the rotation cycle of the discharge port, enhancing the penetration ability of the agent into the sludge, but also a large flow of liquid can be generated, achieving full diffusion of the agent.

[0009] Preferably, the bottom of the tank is provided with an air inlet that can be connected to an external air pump. When the external air pump supplies air into the mixing chamber, the air pressure can push the lifting plate to move upward. An elastic element is provided between the lower end of the lifting plate and the bottom of the tank to drive the lifting plate to reset.

[0010] Preferably, a central shaft is rotatably mounted in the middle of the tank. The central shaft is coaxially slidably sleeved on the outside of the hollow rod. Multiple receiving slots are provided on the central shaft to accommodate the stirring rod. The lower end of the stirring rod is hinged to the central shaft via a torsion spring. When the lifting plate is at the lower end of the mixing chamber, the stirring rod extends at an angle under the action of the torsion spring. When the lifting plate moves upward, the stirring rod is pressed and retracted into the receiving slot. The effect is that the foldable stirring rod unfolds during stirring to ensure efficiency and automatically retracts into the central shaft under pressure during drainage, perfectly solving the spatial interference problem between the stirring assembly and the piston-type drainage mechanism.

[0011] Preferably, the distance between the upper end of each receiving slot and the top of the mixing chamber is less than the thickness of the lifting plate. This ensures that when the lifting plate moves to its highest point, the stirring rod remains covered by the inner wall of the lifting plate and remains retracted, preventing the stirring rod from getting stuck and thus ensuring the smooth repositioning of the lifting plate.

[0012] Preferably, multiple stirring rods are staggered in the axial and circumferential directions of the central shaft, and have different tilt angles. The effect is that the staggered distribution of the stirring rods can create complex three-dimensional turbulence in the mixing chamber, which greatly improves the shear dispersion efficiency of viscous agents.

[0013] Preferably, the tank is also equipped with a drive structure 1 for driving the stirring rod to rotate around the axis of the central shaft. The drive structure 1 includes a gear 1, a gear 2 and a motor 1. The gear 1 is rotatably mounted on the inner bottom wall of the tank, the gear 2 is fixedly mounted on the central shaft, and the gear 1 and gear 2 mesh and drive each other. The motor 1 is mounted at the bottom of the tank, and the output end of the motor 1 is connected to the gear 1.

[0014] Preferably, a partition is connected to the outer periphery of the annular baffle, and the outer periphery of the partition is rotatably engaged with the inner wall of the rotating plate, thereby dividing the discharge chamber into upper and lower spaces through the partition. The upper space is connected to the overflow port, and the lower space is equipped with a drive structure two for driving the rotating plate to rotate.

[0015] Preferably, the second drive structure includes a third gear, a gear ring, and a second motor. The third gear is rotatably mounted on the lower side of the partition, the gear ring is fixedly mounted on the inner wall of the rotating plate, and the third gear meshes with the gear ring for transmission. The second motor is installed in the space on the lower side of the partition, and the output end of the second motor is connected to the third gear.

[0016] Preferably, the bottom of the hollow rod is connected to multiple straight rods, each arranged radially along the hollow rod and evenly distributed circumferentially along the hollow rod. Each straight rod has multiple air pump ports along its length on its upper side. The effect is that the multiple air pump ports distributed on the straight rods generate a large number of high-pressure rising bubbles at the bottom of the dosing tank, enhancing the disturbance effect of the airflow on the water body, ensuring that the agent remains in a suspended state before complete dissolution and reaction, and improving the utilization rate of the agent.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. This invention features a submersible tank that can "miniaturize" the reaction environment of a large dosing tank into a small, movable tank. Within the small mixing chamber, a stirring assembly is used to perform high-intensity mechanical shearing, forcibly homogenizing the drug powder and water. This fundamentally eliminates the "fish-eye" and agglomeration phenomena caused by excessively high local concentrations in the initial stage of water introduction, ensuring that the drug enters the wastewater in a completely dissolved molecular state, greatly improving the utilization rate of the drug.

[0018] 2. This invention is equipped with a rotating spraying mechanism and a pumping assembly. During the up-and-down movement of the tank, the high-speed rotation of the rotating plate generates centrifugal force, which sprays the concentrated medicine inside the discharge chamber out horizontally in a 360-degree direction, forming a huge diffusion surface. Combined with the strong upward airflow generated by the bottom pumping assembly, the medicine is quickly carried to various depths of the water body, realizing three-dimensional diffusion of the medicine and eliminating the bottom reaction dead zone caused by traditional surface dosing.

[0019] 3. The present invention is equipped with a lifting plate and a foldable stirring rod, which realizes the function of "expanding during stirring and retracting during drainage". When the lifting plate moves upward, it can force the stirring rod to retract into the central shaft, simulating the "syringe piston" to drain the liquid, effectively scraping off the viscous liquid or crystals remaining on the inner wall of the mixing chamber, preventing the accumulation of medicine on the wall and affecting the accuracy of the next mixing ratio, and realizing the self-cleaning of the mixing chamber.

[0020] 4. The present invention is equipped with an adjustment component. Through the inclined design of the lower end face of the boss, the discharge port can not only generate a high-pressure jet during the rotation cycle, which enhances the penetration ability of the agent into the sludge at the bottom of the dosing tank, but also generate a large flow of liquid to achieve full diffusion of the agent, thereby further improving the mixing efficiency of the agent and the sludge. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a top view of the present invention.

[0023] Figure 3This is a schematic diagram of the assembly structure of the pump assembly and the tank of the present invention.

[0024] Figure 4 This is a schematic diagram of the tank body of the present invention cut in the transverse direction.

[0025] Figure 5 This is a top view of the tank body of the present invention.

[0026] Figure 6 for Figure 5 A cross-sectional view along the AA direction.

[0027] Figure 7 This is a schematic diagram of the assembly structure of the tank and the rotating spraying mechanism of the present invention.

[0028] Figure 8 This is a schematic diagram of the assembly structure of the tank and the adjustment component of the present invention.

[0029] Figure label: 1. Dosing tank; 11. Hollow rod; 12. Straight rod; 121. Pump air port; 2. Tank body; 201. Water inlet; 202. Chemical inlet; 203. Air inlet; 21. Annular baffle; 211. Overflow port; 22. Central shaft; 221. Receiving tank; 23. Stirring rod; 24. Gear 1; 25. Gear 2; 26. Motor 1; 27. Partition; 3. Lifting plate; 31. Elastic element; 4. Rotating plate; 401. Discharge port; 41. Gear 3; 42. Gear ring; 43. Motor 2; 5. Boss. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] like Figures 1-8 As shown, a recycling device for treating wastewater from a shoe factory includes a dosing tank 1, a pump assembly, a tank 2, and a rotary spraying mechanism.

[0032] like Figures 1-3 As shown, the air pump assembly includes a hollow rod 11, which is vertically installed at the center of the dosing tank 1. The interior of the hollow rod 11 is machined into a hollow structure to form an airflow channel. Its top end extends out of the liquid surface and is connected to an external air pump, while its bottom end serves as an open airflow output end.

[0033] To enhance the disturbance effect of airflow on the water body, the bottom of the hollow rod 11 is connected to multiple radially distributed straight rods 12. Each straight rod 12 is arranged radially along the hollow rod 11, and the multiple straight rods 12 are evenly distributed circumferentially along the hollow rod 11. Each straight rod 12 is provided with multiple air pumping ports 121 along its length, and all air pumping ports 121 are designed to open upwards.

[0034] When the external air pump is activated, airflow flows through the airflow channel inside the hollow rod 11 and is ejected upwards through the pump port 121, generating a large number of high-pressure rising bubbles at the bottom of the dosing tank 1. These bubbles rise rapidly to the liquid surface under buoyancy, creating a strong upward flow of surrounding sewage. This effectively lifts and disperses the attempting-to-settle chemical particles back to the middle and upper water layers, ensuring that the chemical remains suspended until it is completely dissolved and reacts. This improves the utilization rate of the chemical and reduces waste.

[0035] like Figures 2-3 As shown, the tank body 2 is fitted onto the outside of the hollow rod 11 and slides longitudinally with the hollow rod 11. The hollow rod 11 and its bottom straight rod 12 not only serve as a gas passage but also constitute a stable mechanical base. Furthermore, the outer cylindrical surface of the hollow rod 11 is hardened, allowing it to directly function as a linear guide for the vertical movement of the tank body 2, ensuring stable movement even in environments with violent gas-liquid turbulence. A belt drive structure (not shown) is also installed inside the dosing tank 1 to drive the tank body 2 to move vertically within the tank. Specifically, a support is provided above the dosing tank 1, on which a lifting motor and a drive pulley are mounted. A driven pulley is located at the bottom of the dosing tank 1, and a synchronous toothed belt is tensioned and wound between the drive pulley and the driven pulley. The outer wall of the tank body 2 is fixedly connected to the synchronous toothed belt via a connector. When the lifting motor is working, it drives the tank 2 to move in a vertical reciprocating linear motion in the dosing pool 1 with the hollow rod 11 as the guide rail via the synchronous toothed belt, thereby realizing the deep submersion dosing of the agent and the repositioning dosing on the liquid surface.

[0036] like Figures 3-7As shown, the tank 2 is hollow inside and has a concentric annular baffle 21, which divides the internal space of the tank 2 into a mixing chamber on the inner side and a discharge chamber on the outer side. The top of the tank 2 has a water inlet 201 and a chemical inlet 202 connecting to the mixing chamber, and the outer periphery of the tank 2 has a discharge outlet 401 connecting to the discharge chamber. The lower end of the annular baffle 21 is welded and sealed to the bottom of the tank 2, while the upper end leaves a gap with the top of the tank 2 to form an overflow outlet 211. After water and chemicals are injected into the tank 2, the chemicals dissolve in the mixing chamber and are discharged in the discharge chamber. The overflow outlet 211 acts as a "level valve." When the mixing chamber is working normally, the liquid level inside the chamber is lower than the sewage level in the dosing tank 1. Only when the pressure inside the mixing chamber is higher than the external sewage pressure will the material overflow from the overflow outlet 211 to the discharge chamber; when the external sewage pressure is too high, the low pressure inside the chamber prevents overflow from the overflow outlet 211. A one-way valve is installed inside the discharge port 401. The one-way valve only allows the material in the discharge chamber to be discharged outward, preventing external sewage from entering in reverse and achieving backflow prevention.

[0037] like Figures 3-7 As shown, the rotary spraying mechanism includes a lifting plate 3. The lifting plate 3 is longitudinally slidably installed in the mixing chamber. Specifically, a central shaft 22 is rotatably installed in the middle of the tank body 2. The central shaft 22 is coaxially slidably sleeved on the outside of the hollow rod 11. An inner hole is opened at the center of the lifting plate 3 to closely fit the central shaft 22. The outer periphery of the lifting plate 3 is sealed to the inner wall of the annular baffle 21. In addition, to ensure the stability of the lifting plate 3's vertical movement, a guide rod is provided inside the tank body 2, and the lifting plate 3 slides longitudinally with the guide rod.

[0038] In this embodiment, in order to realize the vertical movement of the lifting plate 3, an air inlet 203 is provided at the bottom of the tank body 2, which can be connected to an external air pump. Specifically, the air inlet 203 is connected to the external air pump through a telescopic sleeve pipe. An elastic element 31 is provided between the lower end of the lifting plate 3 and the bottom of the tank body 2 for driving the lifting plate 3 to reset. The elastic element 31 can be a spring.

[0039] When the external air pump starts, compressed air enters the bottom of tank 2 through the pipeline, filling the sealed space below the lifting plate 3. The air pressure pushes the lifting plate 3 upward. This upward movement of the lifting plate 3 pushes the material in the mixing chamber through the overflow port 211 into the discharge chamber, preparing for subsequent discharge. The upward movement of the lifting plate 3 also physically scrapes the inner wall of the mixing chamber, achieving self-cleaning and effectively preventing chemical residue and adhesion, ensuring accurate dosage each time. When discharge is complete, the air path is depressurized, and the elastic element 31 at the bottom quickly pulls the lifting plate 3 back to its original position, preparing for the next chemical addition.

[0040] like Figures 3-7As shown, to achieve stirring within the mixing chamber, this embodiment employs a "retractable" stirring assembly. Specifically, the stirring assembly includes a stirring rod 23 and a drive structure. Multiple receiving slots 221 for accommodating the stirring rod 23 are provided on the central shaft 22. The lower end of the stirring rod 23 is hinged to the central shaft 22 via a torsion spring. Initially, the lifting plate 3 is located at the lower end of the mixing chamber. At this time, the stirring rod 23 is ejected under the preload of the torsion spring, extending at an angle. When the lifting plate 3 moves upward under air pressure to drain the liquid, the inner ring surface of the lifting plate 3 contacts the root of the angled stirring rod 23. As the lifting plate 3 continues to rise, the stirring rod 23 is compressed against the torsion spring force, gradually folding and completely retracting into the receiving slots 221. At this point, the surface of the central shaft 22 becomes smooth, allowing the lifting plate 3 to slide freely across the central shaft 22, squeezing out all the liquid. When the lifting plate 3 descends and resets, and passes the receiving groove 221, the unrestrained stirring rod 23 is ejected again under the action of the torsion spring, ready for the next stirring.

[0041] To ensure smooth repositioning of the stirring rod 23, the distance between the upper end of each receiving tank 221 and the top of the mixing chamber is less than the thickness of the lifting plate 3. This ensures that when the lifting plate 3 moves to its highest position, the stirring rod 23 remains covered by the inner wall of the lifting plate 3 and remains in its retracted state, preventing the stirring rod 23 from getting stuck on the lifting plate 3. Furthermore, to improve the stirring effect of the stirring rod 23, multiple stirring rods 23 are staggered in the axial and circumferential directions of the central shaft 22 and have different tilt angles. Specifically, the hinge point of each stirring rod 23 with the central shaft 22 is at a different height. This creates a complex three-dimensional turbulence within the mixing chamber, greatly improving the shear dispersion efficiency of viscous agents.

[0042] like Figures 4-7 As shown, a drive structure is provided on the tank 2 to achieve the rotation of the stirring rod 23. The drive structure includes a gear 24, a gear 25, and a motor 26. Gear 24 is rotatably mounted on the inner bottom wall of the tank 2, gear 25 is fixedly mounted on the central shaft 22, and gears 24 and 25 mesh and transmit power. The motor 26 is mounted on the bottom of the tank 2, and its output end is connected to gear 24. When the motor 26 operates, it drives the central shaft 22 to rotate at high speed, thereby driving the extended stirring rod 23 to break up and mix the liquid medicine.

[0043] After the liquid medicine is squeezed into the discharge chamber by the lifting plate 3, it needs to be evenly diffused into the sewage. For example... Figures 3-7As shown, the rotary spraying mechanism also includes a rotating plate 4. The rotating plate 4 is rotatably mounted on the outer periphery of the tank 2 at a position corresponding to the discharge chamber, and the discharge port 401 is opened on the rotating plate 4. When the rotating plate 4 rotates, it can use centrifugal force to throw the material in the discharge chamber out of the discharge port 401 at high speed. Therefore, during the up-and-down movement of the tank 2, the centrifugal force generated by the high-speed rotation of the rotating plate 4 can evenly throw the concentrated medicine inside the discharge chamber out in a 360-degree horizontal direction, forming a huge diffusion surface with a coverage range far exceeding that of static nozzles. At the same time, in conjunction with the strong upward airflow generated by the bottom pump assembly, the agent is quickly carried to all depths of the water body, realizing three-dimensional diffusion of the agent and eliminating the bottom reaction dead zone caused by traditional surface dosing.

[0044] In some embodiments, to address the problem of thick sludge at the bottom of the dosing tank 1, which is difficult to penetrate with conventional spraying force, an adjustment component for changing the effective spray cross-sectional area of ​​the discharge port 401 is also installed on the tank body 2. For example... Figure 8 As shown, the adjustment assembly includes multiple bosses 5 connected end-to-end along the circumferential direction. Each boss 5 is fixedly connected to the tank body 2 and suspended above the outer periphery of the rotating plate 4. The lower end face of each boss 5 is an inclined plane, which gradually slopes upwards along the rotation direction of the rotating plate 4. The discharge port 401 is located within the coverage trajectory of the bosses 5. By rotating the rotating plate 4, the discharge port 401 can periodically move to different height areas of the bosses 5, thereby changing the effective spray cross-sectional area of ​​the discharge port 401.

[0045] During equipment operation, the drive plate 4 rotates relative to the tank 2. At this time, the discharge port 401 on the drive plate 4 moves along a circular path, continuously sweeping over multiple end-to-end protrusions 5 fixed to the outside of the tank 2. Since the lower end face of each protrusion 5 is an inclined surface sloping upwards along the rotation direction, when the discharge port 401 rotates to the lowest point of the protrusion 5's inclined surface, the obstruction area of ​​the lower end face of the protrusion 5 on the discharge port 401 is maximized, and the effective spray cross-sectional area of ​​the discharge port 401 is compressed to its minimum. At this time, the agent flow rate is forced to increase dramatically, forming a high-pressure jet with extremely strong impact and penetrating power, capable of piercing the thick sludge layer or crust layer deposited at the bottom of the dosing tank 1. As the drive plate 4 continues to rotate, the discharge port 401 slides relative to the inclined surface, the upper obstruction gradually rises, the effective spray cross-sectional area gradually increases, the jet pressure decreases while the flow rate increases. At this time, the agent mainly plays a flushing and diffusion role, thoroughly mixing the crushed sludge with the agent. When the discharge port 401 rotates past the end of the protrusion 5 and enters the beginning of the next protrusion 5, the effective spray cross-sectional area jumps from the maximum to the minimum. This cycle repeats continuously. As the rotating plate 4 continues to rotate, the spray state of the discharge port 401 switches between "high pressure restricted" and "low pressure open". This not only effectively improves the penetration ability of the agent, but also ensures the full discharge of the agent and improves the mixing efficiency of the agent and sludge.

[0046] like Figures 4-7 As shown, a partition 27 is connected to the outer periphery of the annular baffle 21, and the outer periphery of the partition 27 is rotatably engaged with the inner wall of the rotating plate 4, and a sealing ring is provided. Thus, the partition 27 divides the discharge chamber into upper and lower spaces: the upper space is connected to the overflow port 211 for the flow of liquid medicine; the lower space is equipped with a second drive structure for driving the rotating plate 4 to rotate. The second drive structure includes a third gear 41, a gear ring 42, and a second motor 43. The third gear 41 is rotatably mounted on the lower side of the partition 27, the gear ring 42 is fixedly mounted on the inner wall of the rotating plate 4, and the third gear 41 meshes with the gear ring 42 for transmission. The second motor 43 is installed in the sealed space below the partition 27, and the output end of the second motor 43 is connected to the third gear 41. The operation of the second motor 43 drives the rotating plate 4 to rotate, achieving uniform spraying of the medicine.

[0047] Based on the above-described apparatus, the processing procedure of the present invention includes the following steps: S1. Dosing: Initially, tank 2 is positioned above dosing tank 1, awaiting dosing. After preliminary filtration, wastewater enters dosing tank 1, and clean water is injected into tank 2 through water inlet 201. Solid or concentrated chemicals are added into tank 2 through chemical inlet 202. At this time, the gas path is depressurized, and under the action of elastic element 31, lifting plate 3 is located at the bottom of the mixing chamber, and stirring rod 23 is tilted and extended under the action of torsion spring. After dosing is completed, the belt drive structure is activated, driving tank 2 to descend to the bottom of dosing tank 1.

[0048] S2. Rapid Mixing: As the tank 2 moves downward, motor 26 is activated, driving gears 24 and 25 to rotate, which in turn drives the central shaft 22 and stirring rod 23 to rotate at high speed. Within the enclosed mixing chamber, high-intensity mechanical shearing force rapidly disperses and dissolves the reagent, preventing "fish-eye" agglomeration. During this process, the lifting plate 3 remains stationary at the bottom, serving as the base of the mixing chamber.

[0049] S3. Pneumatic Discharge: After mixing, the tank 2 is moved upwards via a belt drive structure. During this upward movement, an external air pump is activated, allowing compressed air to enter the space at the bottom of the lifting plate 3, pushing it upwards. As the lifting plate 3 moves, its inner wall forces the stirring rod 23 to overcome the torsion spring resistance and retract into the receiving tank 221. Simultaneously, the lifting plate 3 pushes the mixed liquid past the overflow port 211 and into the discharge chamber.

[0050] S4. Rotary Spraying: As the lifting plate 3 moves upward, motor 2 43 is activated. Motor 2 43 drives the gear ring 42 via gear 3 41, causing the external rotating plate 4 to rotate at high speed. Under the combined action of pressure and centrifugal force, the liquid medicine entering the discharge chamber is sprayed out of the discharge port 401 in a 360-degree arc, quickly reacting with the surrounding sewage. At the same time, the external air pump continuously supplies air to the hollow rod 11, and the air pump port 121 on the bottom straight rod 12 sprays a powerful airflow upward, rapidly entraining the medicine to all depths of the water body, achieving three-dimensional diffusion of the medicine.

[0051] S5. Reset and Self-Cleaning: After spraying, the external air pump stops and exhausts air. The elastic element 31 pulls the lifting plate 3 downward to reset. When the lifting plate 3 leaves the area of ​​the stirring rod 23, the stirring rod 23 pops out again. At this time, a small amount of clean water can be injected again to repeat the above process for self-cleaning and prevent pesticide residue.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A recycling device for treating wastewater from shoe factories, comprising a dosing tank, characterized in that, It also includes an air pump assembly, a tank, and a rotary spraying mechanism; The air pump assembly includes a hollow rod arranged longitudinally in the dosing tank. The hollow rod has a hollow structure inside, forming an airflow channel. The lower end of the hollow rod is open. The tank body is fitted on the outside of the hollow rod and slides longitudinally with the hollow rod. The inside of the tank body is hollow and equipped with an annular baffle, which divides the internal space of the tank body into a mixing chamber located on the inside and a discharge chamber located on the outside. The lower end of the annular baffle is connected to the bottom of the tank body, and the upper end is left with a gap between it and the top of the tank body to form an overflow port. The top of the tank body is equipped with a water inlet and a chemical inlet that connect to the mixing chamber. The rotary spraying mechanism includes a lifting plate and a rotating plate. The lifting plate is longitudinally slidably installed in the mixing chamber. The bottom of the tank is provided with an air inlet that can be connected to an external air pump. The air inlet is connected to the external air pump through a telescopic sleeve pipe. When the external air pump passes air through the air inlet to the lower part of the lifting plate, the air pressure can push the lifting plate upward and push the material in the mixing chamber into the discharge chamber through the overflow port. An elastic element is provided between the lower end of the lifting plate and the bottom of the tank to drive the lifting plate to reset. A stirring rod is installed inside the mixing chamber. The stirring rod has an inclined extension stirring state and a vertical retracted avoidance state. A central shaft is rotatably installed in the middle of the tank. The central shaft is coaxially slidably sleeved on the outside of the hollow rod. An inner hole that can closely fit the central shaft is opened at the center of the lifting plate. The outer periphery of the lifting plate is sealed to the inner wall of the annular baffle. Multiple receiving grooves for accommodating the stirring rod are opened on the central shaft. The lower end of the stirring rod is hinged to the central shaft through a torsion spring. When the lifting plate is located at the lower end of the mixing chamber, the stirring rod is inclined and extended under the action of the torsion spring. When the lifting plate moves upward, the stirring rod is pressed and retracted into the receiving groove. The distance between the upper end of each receiving groove and the top of the mixing chamber is less than the thickness of the lifting plate. The rotating plate is mounted on the outer periphery of the tank at the position corresponding to the discharge chamber. The rotating plate has a discharge port. When the rotating plate rotates, it can spray the material in the discharge chamber into the dosing tank. The tank is also equipped with an adjustment component for changing the effective spray cross-sectional area of ​​the discharge port.

2. The recycling equipment for treating shoe factory wastewater according to claim 1, characterized in that, The adjustment assembly includes multiple bosses connected end to end along the circumference. Each boss is fixedly connected to the tank and suspended above the outer periphery of the rotating plate. The lower end face of each boss is an inclined plane, which gradually slopes from bottom to top along the rotation direction of the rotating plate. The discharge port is located within the coverage trajectory of the boss. By rotating the rotating plate, the discharge port can periodically move to different height areas of the boss, thereby changing the effective spray cross-sectional area of ​​the discharge port.

3. The recycling equipment for treating shoe factory wastewater according to claim 1, characterized in that, Multiple stirring rods are staggered along the central shaft in both the axial and circumferential directions, and have different tilt angles.

4. The recycling equipment for treating shoe factory wastewater according to claim 1, characterized in that, The tank is also equipped with a drive structure 1 for driving the stirring rod to rotate around the central axis. The drive structure 1 includes a gear 1, a gear 2 and a motor 1. The gear 1 is rotatably mounted on the inner bottom wall of the tank, the gear 2 is fixedly mounted on the central shaft, and the gear 1 and gear 2 mesh and drive each other. The motor 1 is mounted on the bottom of the tank, and the output end of the motor 1 is connected to the gear 1.

5. The recycling equipment for treating shoe factory wastewater according to claim 1, characterized in that, A partition is connected to the outer periphery of the annular baffle, and the outer periphery of the partition rotates with the inner wall of the rotating plate, thereby dividing the discharge chamber into upper and lower spaces through the partition. The upper space is connected to the overflow port, and the lower space is equipped with a drive structure 2 for driving the rotating plate to rotate.

6. The recycling equipment for treating shoe factory wastewater according to claim 5, characterized in that, The second drive structure includes a third gear, a gear ring, and a second motor. The third gear is rotatably mounted on the lower side of the partition, and the gear ring is fixedly mounted on the inner wall of the rotating plate. The third gear meshes with the gear ring for transmission. The second motor is installed in the space on the lower side of the partition, and the output end of the second motor is connected to the third gear.

7. The recycling equipment for treating shoe factory wastewater according to claim 1, characterized in that, The bottom of the hollow rod is connected to multiple straight rods, each of which is arranged radially along the hollow rod and the multiple straight rods are evenly distributed circumferentially along the hollow rod. Each straight rod has multiple air inlets on its upper side along its length.

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