A multi-stage treatment system for herbicide wastewater

Abstract

This invention relates to the field of wastewater treatment technology and discloses a multi-stage treatment device for herbicide pesticide wastewater. When high-pressure wastewater is output through the inlet pipe, it pushes the inclined guide vanes to move. Multiple sets of guide vanes cooperate with each other and are driven to rotate by the wastewater, thereby generating a swirling flow inside the treatment tank. The rotating turbulent flow impacts the biofilm treatment component one, generating strong shear force under the action of high-speed swirling flow, continuously renewing the boundary layer on the surface of the biofilm. This not only enhances the mass transfer efficiency of oxygen and organic substrates into the biofilm, but also promotes the diffusion of metabolites and toxic substances outward, effectively avoiding the formation of an anaerobic environment and the accumulation of toxins inside the biofilm, controlling the biofilm thickness at the optimal active state, and ultimately achieving a significant improvement in pollutant degradation efficiency and system stability.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a multi-stage treatment device for herbicide wastewater. Background Technology

[0002] Multi-stage treatment of herbicide wastewater, from pretreatment to biofilm primary treatment to advanced treatment, effectively reduces pollutant concentration and toxicity. The pretreatment stage focuses on toxicity reduction and suspended solids removal, typically employing coagulation and sedimentation processes. Chemicals are added to cause colloids and suspended solids in the wastewater to form flocs and settle. This is combined with a hydrolysis acidification tank to break down recalcitrant large organic molecules into smaller molecules, creating conditions for subsequent biological treatment. The core biofilm treatment stage often uses biological contact oxidation. As wastewater flows through a reaction tank filled with a carrier, the biofilm formed on the carrier surface adsorbs and degrades organic matter. Its stable microbial community and strong shock resistance allow it to adapt to fluctuations in pesticide wastewater toxicity, efficiently removing COD and some characteristic pollutants. The advanced treatment stage uses ozone oxidation or activated carbon adsorption to further degrade residual recalcitrant substances, ensuring that the effluent meets standards.

[0003] The aforementioned and existing related technologies often suffer from the following drawbacks: Existing biofilm packing materials are typically 2-5 mm thick, with microorganisms forming a 500-1000 μm thick biofilm on the packing surface. The diffusion coefficient of toxic intermediate products within the biofilm is only 1 / 10 to 1 / 20 that in water. According to Fick's law of diffusion, it takes a long time for toxins to travel from the biofilm surface to its deeper interior, while the outward diffusion of CO2 and metabolic products produced by microorganisms is also hindered. This bidirectional diffusion limitation leads to: low dissolved oxygen in the deeper regions of the biofilm, creating an anaerobic environment; accumulation of toxic intermediate products within the biofilm, reaching concentrations several times higher than in the water; mass mortality of internal microorganisms due to nutrient deficiency and toxin accumulation; and eventual detachment of the biofilm from the inside out. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the existing technology has the disadvantage that biofilm is not easy to be deeply treated and renewed. To this end, we propose a multi-stage treatment device for herbicide wastewater.

[0005] To achieve the above objectives, this application adopts the following technical solution: a multi-stage treatment device for herbicidal pesticide wastewater, comprising a treatment tank shell, an aeration component installed inside the treatment tank shell, the input end of the aeration component penetrating the treatment tank shell and connected to a blower, an inlet pipe penetrating the treatment tank shell above the aeration component, a biofilm treatment component one installed inside the treatment tank shell at the output end of the inlet pipe, and a vortex generating component one installed inside the treatment tank shell above the aeration component. The vortex generating component one includes a bearing, the outer ring of the bearing is fixedly connected to the inner side of the treatment tank shell, and multiple sets of guide vanes are installed on the upper end of the inner ring of the bearing. Wastewater entering through the inlet pipe drives the guide vanes to rotate, generating a vortex and carrying bubbles upwards into the biofilm treatment component one for treatment.

[0006] Furthermore, the aeration assembly includes a support plate, which is fixedly connected to the inner side of the treatment tank shell. An air inlet pipe is installed at the upper end of the support plate, and multiple sets of aeration plates are installed at the upper middle part of the air inlet pipe. The blower outputs gas from the air inlet pipe, which enters and passes through the aeration plates to generate fine gas.

[0007] Furthermore, a flow guiding assembly is provided between the water inlet pipe and the outer shell of the treatment tank. The flow guiding assembly includes a flow guiding shell, which is installed on the outside of the outer shell of the treatment tank and forms a flow guiding cavity with the outer shell of the treatment tank. A plurality of flow guiding grooves are provided on the outer shell of the treatment tank corresponding to the inner side of the flow guiding cavity. The flow guiding grooves are inclined and the output direction is directly facing the surface of the flow guiding plate that is close to the center of the outer shell of the treatment tank.

[0008] Furthermore, a baffle plate is provided inside the flow guiding cavity, and the baffle plate is close to the output end of the water inlet pipe.

[0009] Furthermore, the biofilm treatment assembly includes a support grid, which is fixedly connected to the outer shell of the treatment tank, and multiple biofilm groups are installed on the support grid.

[0010] Furthermore, an adjustment component is provided in the middle of the support grid, and a transmission component is provided on the support grid. A drive shaft is movably provided inside the adjustment component. The upper end of the drive shaft is driven to rotate by the drive end of a servo motor installed on the upper end of the processing tank shell. The rotation direction of the support grid is opposite to the rotation direction of the guide vane.

[0011] Furthermore, the adjustment assembly includes a transmission rod, a drive shaft located inside the transmission rod, and a flow boosting assembly fixedly installed at the lower end of the transmission rod. The flow boosting assembly includes an external drive gear two and an external driven gear two. The external drive gear two is fixedly connected to the transmission rod, and the external driven gear two is fixedly connected to the inner ring of the bearing one.

[0012] Furthermore, an external drive gear is provided on the outer side of the transmission rod, and the transmission assembly includes an external driven gear. The external driven gear meshes with the external drive gear. A gear ring is fixedly provided at the lower end of the external driven gear. A protective shell is provided on the outer side of the gear ring. The protective shell is rotatably connected to the gear ring and fixedly connected to the outer shell of the processing tank. Multiple internal driven gears are provided on the inner side of the gear ring. The lower end of the internal driven gear is rotatably connected to the protective shell and meshes with the gear ring. An internal drive gear is rotatably provided in the middle of the protective shell. The upper end of the internal drive gear meshes with the internal driven gear and the lower end is fixedly connected to the support grid.

[0013] Furthermore, biofilm treatment component one and biofilm treatment component two are respectively arranged inside the outer shell of the treatment tank. Biofilm treatment component one and biofilm treatment component two have the same structure and are arranged in a mirror image symmetrically. At the same time, two external drive gears one and two external drive gears are also arranged in a mirror image on the outside of the transmission rod. The two support grids arranged in a mirror image are also arranged in a mirror image in opposite directions. A vortex generating component two is also arranged inside the outer shell of the treatment tank above the upper biofilm treatment component two. The vortex generating component two has the same structure as the vortex generating component one, and the lower middle part of the vortex generating component two is connected to another external driven gear two.

[0014] Furthermore, the adjustment assembly also includes an adapter plate rotatably mounted on the upper end of the transmission rod. An electric cylinder is mounted on the upper side of the adapter plate, and the upper end of the electric cylinder is connected to the upper inner side of the processing tank shell. A limiting slider is also provided on the inner side of the upper end of the transmission rod, and the limiting slider is slidably connected to the drive shaft.

[0015] The technical effects and advantages of this invention are as follows:

[0016] In this invention, when high-pressure wastewater is output from the inlet pipe, it drives the tilted guide vanes to move. Multiple sets of guide vanes work together and are rotated by the wastewater, thereby generating a swirling flow inside the treatment tank. The swirling flow field can fully cut and disperse the initial bubbles generated by the aeration plates into microbubbles, significantly increasing the specific surface area. At the same time, the centrifugal force field generated by the swirling flow causes the bubble trajectory to become a spiral ascent, prolonging the contact time between the bubble movement path and the gas-liquid, effectively suppressing bubble merging. This rotating and rising microbubble system can significantly improve the oxygen mass transfer coefficient KLa, and at the same time produce a highly efficient air stripping and stripping effect on toxic volatile intermediate products, significantly improving their removal rate. In addition, the rotating turbulence impacts the biofilm treatment component, generating strong shear force under the action of high-speed swirling flow, continuously renewing the biofilm surface boundary layer—both enhancing the mass transfer efficiency of oxygen and organic substrates into the biofilm interior and promoting the diffusion of metabolites and toxic substances outward, effectively avoiding the formation of an anaerobic environment and the accumulation of toxins inside the biofilm, controlling the biofilm thickness at the optimal active state, and ultimately achieving a significant improvement in pollutant degradation efficiency and system stability. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a single main processing device according to the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the lower end of the outer shell of the processing tank of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the lower end of the outer shell of the processing tank of the present invention;

[0022] Figure 5 This is a schematic diagram of the split structure of the lower end of the processing tank shell of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal planar structure of the processing tank shell of the present invention;

[0024] Figure 7 This is a schematic diagram showing the internal structure of the processing tank shell of the present invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the processing tank shell of the present invention;

[0026] Figure 9 This is a schematic diagram of the disassembled structure of the adjustment component of the present invention;

[0027] Figure 10 For the present invention Figure 3 A magnified structural diagram at point A;

[0028] Figure 11 For the present invention Figure 7 A magnified structural diagram at point B.

[0029] Legend: 1. Treatment tank outer shell; 101. Guide channel; 2. Guide shell; 201. Guide cavity; 202. Baffle plate; 3. Inlet pipe; 4. Bearing 1; 5. Guide plate; 6. Support plate; 7. Air inlet pipe; 8. Aeration plate; 9. Support grid; 10. Biofilm assembly; 11. Servo motor; 12. Drive shaft; 121. Limiting slider; 13. Electric cylinder; 14. Adapter plate; 15. Transmission rod; 16. External drive gear 1; 17. External driven gear 1; 18. Gear ring; 19. Internal driven gear; 20. Internal drive gear; 21. Protective shell; 22. External drive gear 2; 23. External driven gear 2; 24. Drain pipe; 25. Transfer pump. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0031] Reference Figure 1 As shown, the present invention provides a technical solution: a multi-stage treatment device for herbicidal pesticide wastewater, including a main treatment device, wherein multiple main treatment devices are provided, and each main treatment device is connected to the others via a transfer pump 25. The input end of the transfer pump 25 is connected to the output end of the drain pipe 24 of the first-stage main treatment device, and the output end of the transfer pump 25 is connected to the input end of the inlet pipe 3 of the second-stage main treatment device, and so on. The number of main treatment devices can be specifically set according to the concentration of wastewater and the treatment standards.

[0032] Reference Figures 2-3As shown, the main treatment equipment includes a treatment tank shell 1 for carrying wastewater and supporting the internal mechanisms. The lower end of the treatment tank shell 1 is inverted conical in shape to collect impurities and biological waste. After the wastewater is treated, it is discharged from the drain valve at the lower end of the inverted conical shell. An aeration component is installed inside the treatment tank shell 1 at the upper port of the inner side of the inverted conical shell. The input end of the aeration component is sealed and penetrates the treatment tank shell 1. The gas source for the aeration component is a blower connected to the input end of the aeration component for aeration. An inlet pipe 3 is installed through the treatment tank shell 1 at the upper end of the aeration component. 3 is connected to the output end of the wastewater after the previous stage of treatment. The previous stage of the inlet pipe 3 of the first main treatment equipment can be a sedimentation tank or a fine biological treatment tank. In order to improve the biological treatment effect, it is best to use the biological treatment tank to carry out long-term static biological treatment in a large tank before the main treatment equipment. The previous stage can also be another main treatment equipment. A biofilm treatment component 1 is installed inside the outer shell 1 of the treatment tank located at the output end of the inlet pipe 3. The wastewater entering from the inlet pipe 3 is mixed with the aerated gas and enters the biofilm treatment component 1 for biological treatment. Finally, it is discharged from the drain pipe 24 installed on the flange at the upper end of the treatment tank shell 1.

[0033] In this embodiment, refer to Figures 4-5 As shown, the aeration assembly specifically includes a support plate 6, which is fixedly connected to the inner side of the treatment tank shell 1 by screws or welding. Preferably, the screw connection method is selected to facilitate the overall maintenance or replacement of the aeration assembly. An air inlet pipe 7 is detachably installed on the upper end of the support plate 6. Preferably, the detachable method can be a snap-fit ​​connection. Multiple sets of aeration plates 8 are installed on the upper middle part of the air inlet pipe 7. The gas output by the blower enters from the air inlet pipe 7 and passes through the aeration plates 8 to generate fine gas.

[0034] The treatment tank shell 1 located at the upper end of the aeration plate 8 has a swirl generating component 1 installed inside by screws or welding. The swirl generating component 1 specifically includes a bearing 4. The outer ring of the bearing 4 is fixedly connected to the inner side of the treatment tank shell 1 by screws or welding, which also facilitates the maintenance or replacement of the swirl generating component 1. Multiple sets of guide vanes 5 are detachably installed on the upper end of the inner ring of the bearing 4. The detachable method is preferably screw installation. The guide vanes 5 are perpendicular to the bearing 4, and the angle between the axis of the guide vanes 5 and the axis of the bearing 4 is 30-60 degrees, so that the guide vanes 5 are tilted.

[0035] Specifically, when the inlet pipe 3 outputs high-pressure wastewater, it pushes the inclined guide vanes 5 to move. Multiple sets of guide vanes 5 work together to rotate under the influence of the wastewater, thereby generating a swirling flow inside the outer shell 1 of the treatment tank. The swirling flow field can fully cut and disperse the initial bubbles generated by the aeration plates 8 into microbubbles, significantly increasing the specific surface area. At the same time, the centrifugal force field generated by the swirling flow causes the bubble trajectory to become a spiral ascent, extending the contact time between the bubble path and the gas-liquid mixture, effectively inhibiting bubble merging. This rotating and rising microbubble system can significantly improve the oxygen mass transfer coefficient KLa, and at the same time, it can produce a highly efficient air stripping and stripping effect on toxic volatile intermediate products, significantly improving their removal rate. In addition, the rotating turbulence impacts the biofilm treatment component 1, generating strong shear force under the action of high-speed swirling flow, continuously renewing the biofilm surface boundary layer—both enhancing the mass transfer efficiency of oxygen and organic substrates into the biofilm interior and promoting the diffusion of metabolites and toxic substances outward, effectively preventing the formation of an anaerobic environment and the accumulation of toxins inside the biofilm, controlling the biofilm thickness at the optimal active state, and ultimately achieving a significant improvement in pollutant degradation efficiency and system stability.

[0036] Furthermore, in order to improve the driving effect of the wastewater flow on the multiple sets of guide vanes 5, referring to Figures 4-6 As shown, a flow guiding assembly is provided between the inlet pipe 3 and the outer shell 1 of the treatment tank. The flow guiding assembly includes a flow guiding shell 2, which is installed on the outside of the outer shell 1 of the treatment tank by screws or welding, and forms a flow guiding cavity 201 with the outer shell 1 of the treatment tank. A plurality of flow guiding grooves 101 are opened on the outer shell 1 of the treatment tank corresponding to the inner side of the flow guiding cavity 201. The flow guiding grooves 101 are opened at an angle and the output direction is directly facing the surface of the flow guiding plate 5 that is close to the center of the outer shell 1 of the treatment tank. Preferably, four flow guiding grooves 101 are opened. After the wastewater enters from the inlet pipe 3, it flows under the guidance of the flow guiding cavity 201 and is output from the four flow guiding grooves 101. At the same time, it pushes the flow guiding plate 5 at the corresponding position of the four flow guiding grooves 101, so that the flow guiding plate 5 can rotate relatively stably and at high speed, and the flow capacity of the wastewater is maximized.

[0037] Furthermore, in order to further improve the stability of the water flow on the guide vane 5 and maximize the utilization of its capacity, a baffle plate 202 is provided inside the guide cavity 201. The baffle plate 202 is close to the output end of the inlet pipe 3, so that the wastewater entering from the inlet pipe 3 flows in one direction of the guide cavity 201 under the action of the baffle plate 202, avoiding the capacity offset caused by the flow in two directions.

[0038] In this embodiment, refer to Figures 6-8 As shown, the biofilm treatment component includes a support grid 9 with multiple through holes to facilitate water passage. The support grid 9 is fixedly connected to the outer shell 1 of the treatment tank by screws or welding. Multiple biofilm groups 10 are detachably installed on the support grid 9. Each biofilm group 10 is composed of a support rod and multiple biofilm sheets.

[0039] Furthermore, in this embodiment, referring to Figures 6-8 As shown, a through groove begins in the middle of the support grid 9. An adjustment component is installed inside the through groove, while a transmission component is installed on the support grid 9 outside the through groove. A drive shaft 12 is movably installed inside the adjustment component. The upper end of the drive shaft 12 is driven to rotate by the drive end of the servo motor 11 installed on the upper end of the treatment tank shell 1. The servo motor 11 drives the drive shaft 12 to rotate, which in turn drives the adjustment component to rotate. The rotation of the adjustment component causes the transmission component to drive the support grid 9 to rotate. The rotation direction of the support grid 9 is opposite to the rotation direction of the guide plate 5. Through the opposite rotational force, the surface boundary layer of the biofilm is further improved—both enhancing the mass transfer efficiency of oxygen and organic substrates into the biofilm and promoting the diffusion of metabolites and toxic substances outward.

[0040] Furthermore, in this embodiment, referring to Figures 6-8 as well as Figure 10 As shown, the adjustment assembly includes a transmission rod 15, a drive shaft 12 located inside the transmission rod 15, and a flow boosting assembly fixedly installed at the lower end of the transmission rod 15. The flow boosting assembly includes an external drive gear 22 and an external driven gear 23. The external drive gear 22 is fixedly connected to the transmission rod 15, and the external driven gear 23 is fixedly connected to the inner ring of the bearing 4. The servo motor 11 drives the drive shaft 12 to rotate, which in turn drives the external drive gear 22 to rotate through the transmission rod 15, thereby causing the inner ring of the bearing 4 to rotate, thereby increasing the rotation speed of the guide vane 5 and further increasing the shearing force.

[0041] Furthermore, in this embodiment, referring to Figures 7-9 As shown, the adjustment component drives the transmission component to rotate in the opposite direction as follows:

[0042] An external drive gear 16 is provided on the outer side of the transmission rod 15. The transmission assembly includes an external driven gear 17, which meshes with the external drive gear 16. A gear ring 18 is fixedly mounted on the lower end of the external driven gear 17. A protective housing 21 is provided on the outer side of the gear ring 18, rotatably connected to the gear ring 18 and fixedly connected to the processing tank housing 1. Multiple internal driven gears 19 are provided on the inner side of the gear ring 18. The lower ends of the internal driven gears 19 are rotatably connected to the protective housing 21 and mesh with the gear ring 18. An inner drive gear 20 is rotatably mounted in the middle of the protective shell 21. The upper end of the inner drive gear 20 is meshed with the inner driven gear 19 and the lower end is fixedly connected to the support grid 9. The transmission rod 15 drives the outer drive gear 16 to rotate, and the outer drive gear 16 in turn drives the outer driven gear 17 to rotate. Through the gear ring 18 and the inner driven gear 19, the rotation direction of the inner drive gear 20 and the outer drive gear 16 are ultimately opposite, so that the rotation direction of the biofilm group 10 driven by the support grid 9 is opposite to the rotation direction of the guide plate 5.

[0043] As a preferred embodiment, refer to Figures 6-11 As shown, biofilm treatment component one and biofilm treatment component two are respectively arranged inside the outer shell 1 of the treatment tank. Biofilm treatment component one and biofilm treatment component two have the same structure and are arranged in a mirror symmetrical manner. At the same time, two external drive gears 16 and 22 on the outside of the transmission rod 15 are also arranged in a mirror manner. The two support grids 9 that are arranged in a mirror manner are also arranged in a mirror manner in opposite directions. A vortex generating component two is also arranged inside the outer shell 1 of the treatment tank above the upper biofilm treatment component two. The vortex generating component two has the same structure as the vortex generating component one, and the lower middle part of the vortex generating component two is connected to another external driven gear 23.

[0044] The adjustment assembly also includes a rotatable adapter plate 14 mounted on the upper end of the transmission rod 15. An electric cylinder 13 is mounted on the upper side of the adapter plate 14. The upper end of the electric cylinder 13 is connected to the upper inner side of the processing tank shell 1 by screws. A limiting slider 121 is also provided on the inner side of the upper end of the transmission rod 15. The limiting slider 121 is slidably connected to the drive shaft 12.

[0045] Working principle: In the initial state, one external drive gear 16 at the lower end of the transmission rod 15 is not meshed with the corresponding external driven gear 17, while the other external drive gear 16 at the upper end is meshed with the corresponding external driven gear 17. Similarly, one external drive gear 22 at the lower end of the transmission rod 15 is not meshed with the corresponding external driven gear 23, while the other external drive gear 22 at the upper end is meshed with the corresponding external driven gear 23. At this time, the servo motor 11 drives the drive shaft 12 to rotate, which in turn drives the transmission rod 15 to rotate. Then, through the external drive gear 16, the upper biofilm treatment component 2 rotates, while the external drive gear 22 drives the vortex generator component 2 to rotate.

[0046] Wastewater entering from the inlet pipe 3 flows in one direction of the guide cavity 201 under the action of the baffle plate 202 and is output from the four guide channels 101. At the same time, it pushes multiple guide vanes 5 to move. Multiple sets of guide vanes 5 cooperate with each other and are driven to rotate by the wastewater, thereby generating a swirling flow inside the treatment tank shell 1. The swirling flow field can fully cut and disperse the initial bubbles generated by the aeration plate 8 into microbubbles. At the same time, the centrifugal force field generated by the swirling flow makes the bubble movement trajectory become a spiral upward, prolonging the contact time between the bubble movement path and the gas and liquid. At this time, the biofilm treatment component one does not rotate. At this time, the biofilm treatment component one is in a process of fully contacting and purifying the wastewater. Meanwhile, the corresponding biofilm treatment component two and the swirling flow generation component two rotate. The purpose is to greatly increase the shear force between the water flow and the biofilm when the two rotate in opposite directions, and further continuously and efficiently renew the biofilm surface boundary layer - both enhancing the mass transfer efficiency of oxygen and organic substrate into the biofilm and promoting the diffusion of metabolic products and toxic substances outward.

[0047] After a certain period of processing, the electric cylinder 13 drives the adapter plate 14 to move downwards, which in turn drives the entire transmission rod 15 to move downwards. At this time, one external drive gear 16 at the lower end of the transmission rod 15 meshes with the corresponding external driven gear 17, while the other external drive gear 16 does not mesh with the external driven gear 17. Similarly, one external drive gear 22 at the lower end of the transmission rod 15 meshes with the corresponding external driven gear 23, while the other external drive gear 22 does not mesh with the corresponding external driven gear 23. At this time, the biofilm treatment component 2 does not rotate and only performs purification treatment without shear force, while the biofilm treatment component 1 performs treatment to renew the biofilm surface boundary layer. This process is repeated, which not only ensures that the biofilm can slowly and efficiently treat wastewater, but also continuously maintains the renewal of the biofilm surface boundary layer and the discharge of toxic substances, improving both treatment effect and work efficiency. Finally, the treated water is discharged from the drain pipe 24 into another set of main treatment equipment for multi-stage treatment.

[0048] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A multi-stage treatment device for herbicide wastewater, characterized in that, The system includes a treatment tank shell, an aeration assembly installed inside the treatment tank shell with its input end penetrating the treatment tank shell and connected to a blower, an inlet pipe installed on the treatment tank shell above the aeration assembly, a biofilm treatment assembly one installed inside the treatment tank shell at the output end of the inlet pipe, and a vortex generator assembly one installed inside the treatment tank shell above the aeration assembly. The vortex generator assembly one includes a bearing, the outer ring of which is fixedly connected to the inner side of the treatment tank shell, and multiple sets of guide vanes installed on the upper end of the inner ring of the bearing. Wastewater entering through the inlet pipe drives the guide vanes to rotate, generating a vortex and carrying air bubbles upwards into the biofilm treatment assembly one for treatment. The biofilm treatment assembly includes a support grid, which is fixedly connected to the outer shell of the treatment tank, and multiple sets of biofilm units are installed on the support grid. An adjustment component is provided in the middle of the support grid, and a transmission component is provided on the support grid. A drive shaft is movably provided inside the adjustment component. The upper end of the drive shaft is driven to rotate by the drive end of a servo motor installed on the upper end of the processing tank shell. The rotation direction of the support grid is opposite to the rotation direction of the guide vane.

2. The multi-stage treatment equipment for herbicide wastewater according to claim 1, characterized in that: The aeration assembly includes a support plate, which is fixedly connected to the inner side of the treatment tank shell. An air inlet pipe is installed at the upper end of the support plate, and multiple sets of aeration plates are installed at the upper middle part of the air inlet pipe. The blower outputs gas from the air inlet pipe and passes through the aeration plates to generate fine gas.

3. The multi-stage treatment equipment for herbicide wastewater according to claim 1, characterized in that: A flow guiding assembly is provided between the water inlet pipe and the outer shell of the treatment tank. The flow guiding assembly includes a flow guiding shell, which is installed on the outside of the outer shell of the treatment tank and forms a flow guiding cavity with the outer shell of the treatment tank. Multiple flow guiding grooves are opened on the outer shell of the treatment tank corresponding to the inner side of the flow guiding cavity. The flow guiding grooves are opened at an angle and the output direction is directly facing the surface of the flow guiding plate that is close to the center of the outer shell of the treatment tank.

4. The multi-stage treatment equipment for herbicide wastewater according to claim 3, characterized in that: A baffle plate is provided inside the flow guide cavity, and the baffle plate is close to the output end of the water inlet pipe.

5. The multi-stage treatment equipment for herbicide wastewater according to claim 1, characterized in that: The adjustment assembly includes a transmission rod, a drive shaft located inside the transmission rod, and a flow boosting assembly fixedly installed at the lower end of the transmission rod. The flow boosting assembly includes an external drive gear two and an external driven gear two. The external drive gear two is fixedly connected to the transmission rod, and the external driven gear two is fixedly connected to the inner ring of the bearing one.

6. The multi-stage treatment equipment for herbicide wastewater according to claim 5, characterized in that: An external drive gear is provided on the outer side of the transmission rod, and the transmission assembly includes an external driven gear. The external driven gear meshes with the external drive gear. A gear ring is fixedly provided at the lower end of the external driven gear. A protective shell is provided on the outer side of the gear ring. The protective shell is rotatably connected to the gear ring and fixedly connected to the outer shell of the processing tank. Multiple internal driven gears are provided on the inner side of the gear ring. The lower end of the internal driven gear is rotatably connected to the protective shell and meshes with the gear ring. An internal drive gear is rotatably provided in the middle of the protective shell. The upper end of the internal drive gear meshes with the internal driven gear and the lower end is fixedly connected to the support grid.

7. The multi-stage treatment equipment for herbicide wastewater according to claim 6, characterized in that: Inside the outer shell of the treatment tank, biofilm treatment component one and biofilm treatment component two are respectively arranged. Biofilm treatment component one and biofilm treatment component two have the same structure and are arranged in a mirror image symmetrically. At the same time, two external drive gears one and two external drive gears on the outside of the transmission rod are also arranged in a mirror image. The two support grids arranged in a mirror image are also arranged in a mirror image in opposite directions. On the inner side of the outer shell of the treatment tank above biofilm treatment component two, a vortex generating component two is also arranged. The vortex generating component two has the same structure as vortex generating component one, and the lower middle part of the vortex generating component two is connected to another external driven gear two.

8. The multi-stage treatment equipment for herbicide wastewater according to claim 7, characterized in that: The adjustment assembly also includes a rotatable adapter plate mounted on the upper end of the transmission rod. An electric cylinder is mounted on the upper side of the adapter plate. The upper end of the electric cylinder is connected to the upper inner side of the outer shell of the processing tank. A limiting slider is also provided on the inner side of the upper end of the transmission rod. The limiting slider is slidably connected to the drive shaft.

Images