Composite adsorption equipment for agricultural wastewater treatment and implementation method thereof

Abstract

The invention discloses composite adsorption equipment for agricultural wastewater treatment and an implementation method thereof, and belongs to the technical field of agricultural wastewater treatment. The composite adsorption equipment for agricultural wastewater treatment comprises a mixing tank, a first filter vat is arranged at the upper end of one side of the mixing tank, and a second filter vat and a third filter vat are arranged at the upper end and the lower end of the first filter vat respectively. The problems that in the wastewater treatment process of existing integrated equipment for wastewater treatment, although large-particle impurities can be effectively screened, a core treatment unit of the equipment is still a traditional step-by-step static reaction essentially, and the equipment is difficult to realize dynamic adaptation and optimization of a treatment process are solved; the second filter barrel, the first filter barrel and the third filter barrel are arranged from top to bottom, and the three layers of filter elements in the second filter barrel, the first filter barrel and the third filter barrel can be arranged and combined through rotation to form different liquid flow tracks.

Description

Technical Field

[0001] This invention relates to the field of agricultural wastewater treatment technology, specifically to a composite adsorption device for agricultural wastewater treatment and its implementation method. Background Technology

[0002] Existing composite adsorption equipment for agricultural wastewater treatment mainly refers to treatment devices that integrate multiple adsorption media or combine physical and chemical processes. Its core lies in removing multiple characteristic pollutants in wastewater simultaneously or sequentially through material combination or process coupling, such as suspended solids, ammonia nitrogen, phosphate, organic pesticide residues, and heavy metal ions. This type of equipment aims to overcome the limitations of single adsorption materials to cope with the complex and fluctuating composition of agricultural wastewater. It is a common technical means to achieve deep purification and resource utilization of wastewater.

[0003] Chinese Patent Publication No. CN117509988A discloses an integrated device for treating agricultural non-point source pollution farmland wastewater. The device includes a housing with a control box mounted on it. A sedimentation tank is located inside the housing, and support plates are symmetrically installed inside the sedimentation tank. Filter plates are fixedly mounted on the support plates, used to separate large impurities carried in the wastewater. A strip-shaped groove is located inside the support plate, and a drive assembly is located inside the strip-shaped groove. This invention, by using filter plates and scrapers, facilitates the screening and collection of impurities carried in the wastewater entering the integrated device for treating agricultural non-point source pollution farmland wastewater. The filter plates can screen and filter weeds or other solid waste carried in the wastewater, preventing weeds from entering the integrated wastewater treatment device and causing blockages and damage. It also prevents secondary pollution of the water quality caused by weeds or solid waste.

[0004] Although the aforementioned patented integrated wastewater treatment equipment can effectively screen out large particulate impurities during the wastewater treatment process, its core treatment unit is essentially a traditional step-by-step static reaction. Its filter plates and other components are fixedly installed and cannot be flexibly adjusted. When faced with the complex and variable characteristics of agricultural wastewater quality and pollutant composition, this equipment is difficult to achieve dynamic adaptation and optimization of the treatment process. Summary of the Invention

[0005] The purpose of this invention is to provide a composite adsorption device and its implementation method for treating agricultural wastewater. By arranging a second filter barrel, a first filter barrel, and a third filter barrel from top to bottom, the three filter elements in the second filter barrel, the first filter barrel, and the third filter barrel can be rotated to arrange and combine different liquid flow trajectories. Different liquid flow trajectories are adapted to wastewater in different states, which solves the problem that traditional fixed equipment cannot flexibly adapt to water quality fluctuations and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a composite adsorption device for agricultural wastewater treatment, comprising a mixing tank, a first filter barrel being provided at the upper end of one side of the mixing tank, a second filter barrel and a third filter barrel being provided at the upper and lower ends of the first filter barrel respectively, three fan-shaped mounting grooves being evenly distributed around the interior of the second filter barrel, the first filter barrel and the third filter barrel, and filter elements being provided inside the mounting grooves, a second transmission ring being welded around the outer wall of the second filter barrel, the third filter barrel and the first filter barrel, four second rollers being evenly distributed around the upper and lower ends of the second transmission ring, a protective ring being provided around the second transmission ring, and a pair of hydraulic telescopic rods being laterally provided on the outer side of the third filter barrel and the second filter barrel corresponding to one end of the protective ring.

[0007] Preferably, the first filter barrel is provided with brackets on both sides, and the brackets are welded and fixed to the protective ring on the outside of the first filter barrel. The two ends of the hydraulic telescopic rod are respectively fixedly connected to the protective ring and the brackets by bolts.

[0008] Preferably, the second and third filter barrels are both vertically arranged with connecting rods on the outer second transmission rings facing the first filter barrel. Three connecting rods are evenly distributed around the first filter barrel. Three connecting frames are evenly distributed around the upper and lower ends of the outer wall of the first filter barrel. The connecting rods slide through the connecting frames. The lower end of the connecting rod is provided with a threaded nut.

[0009] Preferably, the first filter barrel is provided with connecting rings at both the top and bottom ends, the second filter barrel is provided with connecting grooves at both the top and bottom ends and the third filter barrel is provided with connecting grooves, and the inside of the connecting grooves is connected to the outside sliding grooves of the connecting rings. The upper part of the outside of the second filter barrel is provided with a connecting cover, the lower end of the connecting cover is provided with a connecting ring, and the connecting ring is connected to the inside groove of the connecting groove. The connecting cover is fixedly connected to the outer wall of the second filter barrel by bolts.

[0010] Preferably, three second hoses are evenly distributed around the upper end of the connecting cover, and three third hoses are evenly distributed around the lower end of the third filter barrel. The third hoses are sealed to the third filter barrel through a second valve, and the second hoses are sealed to the connecting cover through a second valve.

[0011] Preferably, a sedimentation tank is arranged around the mixing tank, and four dividing strips are evenly distributed around the interior of the sedimentation tank. A first transmission ring is arranged around the upper end of the outer side of the sedimentation tank. A first roller is arranged at the lower end of the first transmission ring facing the upper end of the sedimentation tank. The inner wall of the first transmission ring is arranged with tooth grooves. A gear is arranged at the upper end of the mixing tank, and the outer side of the gear is meshed with the outer side of the tooth groove. A first flexible hose is arranged on the side of the first transmission ring.

[0012] Preferably, the three filter elements inside the second filter barrel are quartz sand filter media, fiber ball filter media, and volcanic rock filter media, respectively; the three filter elements inside the first filter barrel are natural zeolite, salt-modified zeolite, and ion exchange resin, respectively; and the three filter elements inside the third filter barrel are activated carbon, phosphorus removal filter media, and bio-ceramic particles, respectively.

[0013] Preferably, the filter element is wrapped in a filter bag.

[0014] The implementation method of the composite adsorption equipment for agricultural wastewater treatment includes the following steps: Step 1: External liquid is transferred to the sedimentation tank through the first hose. The gear drives the first transmission ring connected to the first hose to rotate through the tooth groove. After the first transmission ring rotates to adjust the first hose, the position where the liquid falls is adjusted. Step 2: After the liquid is initially filtered through the screening screen, it enters the sedimentation tank. The sediment can be pumped out by the sludge pump. After the first valve on the inner wall of the sedimentation tank is opened, the first liquid pump is started. The first liquid pump pumps out the settled liquid, so that the liquid enters the mixing tank. Step 3: After being driven by the motor, the second roller drives the first filter barrel, the second filter barrel, and the third filter barrel to rotate via the second transmission ring. Step 4: The hydraulic telescopic rod extends and pushes the second and third filter barrels respectively while being held by the second roller. The connecting groove at the upper end of the third filter barrel and the connecting groove at the lower end of the second filter barrel are respectively connected to the connecting rings at the upper and lower ends of the first filter barrel. At the same time, the connecting rod is inserted into the connecting frame and the nut is rotated outside the connecting rod. Step 5: Add the flocculant into the mixing tank to contact the liquid drawn by the first liquid pump. The liquid is then transferred to the first fixed pipe by the second liquid pump. Open the two second valves in the longitudinal liquid flow trajectory. The liquid transferred in the first fixed pipe flows into the second filter tank, the first filter tank, and the third filter tank through the second hose, contacting the filter elements after their positions have been adjusted, and completing the filtration. Step 6: The filtered liquid flows out from the third filter tank and is transported along the third hose to the disinfection tank for further filtration. The filtered liquid is then discharged from the disinfection tank, completing the wastewater treatment process.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention arranges a second filter barrel, a first filter barrel, and a third filter barrel from top to bottom. The three filter elements inside the second filter barrel, the first filter barrel, and the third filter barrel can be rotated to arrange and combine different liquid flow trajectories. Different liquid flow trajectories are adapted to sewage in different states, solving the problem that traditional fixed equipment cannot flexibly adapt to water quality fluctuations.

[0016] 2. The mixing tank of this invention is surrounded by an annular sedimentation tank. The interior of the sedimentation tank is evenly divided by dividing strips. The four dividing strips can directly divide the interior of the sedimentation tank into four static areas. The four static areas can provide a stable storage location for sewage. Sewage added at different times can be stored in different independent areas, avoiding the failure of static treatment caused by the liquid added later directly contacting the liquid that was previously static, thus improving the efficiency of sewage treatment. The first hose used for drainage can be rotated by gear drive. The rotation of the first hose along the sedimentation tank can adjust the position of sewage falling, which is convenient and efficient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the transmission trajectory of the second fixed tube in this invention; Figure 3 This is a cross-sectional view showing the positional relationship of the first roller in this invention; Figure 4 For the present invention Figure 3 Enlarged view of a portion of region A in the middle; Figure 5 This is a schematic diagram of the retraction trajectory of the hydraulic telescopic rod of the present invention; Figure 6 This is a schematic diagram showing the connection positions of the second filter barrel, the first filter barrel, and the third filter barrel of the present invention. Figure 7 This is a cross-sectional view of the internal structure of the protective ring of the present invention; Figure 8 This is a schematic diagram showing the positional relationship of the first roller in this invention; Figure 9 This is a schematic diagram showing the positional relationship of the connecting grooves in this invention; Figure 10 For the present invention Figure 9 Enlarged view of a portion of region B in the middle; Figure 11 For the present invention Figure 9 Enlarged view of a portion of region C in the middle; Figure 12 This is a schematic diagram showing the positional relationship of the connecting rings in this invention.

[0018] In the diagram: 1. Sedimentation tank; 2. Dividing strip; 3. Inclined surface; 4. Screening mesh; 5. Sludge pump; 6. First transmission ring; 7. Gear groove; 8. Gear; 9. Mixing tank; 10. Disinfection tank; 11. First hose; 12. Support; 13. First filter barrel; 14. Second filter barrel; 15. Third filter barrel; 16. First fixed pipe; 17. Second hose; 18. Third hose; 19. First valve; 20. Second fixed pipe; 21. Third fixed pipe; 22. First liquid pump; 23. First roller; 24. Protective ring; 25. Connecting cover; 26. Connecting rod; 27. Connecting frame; 28. Nut; 29. ​​Hydraulic telescopic rod; 30. Second transmission ring; 31. Second roller; 32. Mounting groove; 33. Filter element; 34. Connecting groove; 35. Connecting ring; 36. Second valve; 37. Second liquid pump. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] like Figure 1 As shown, the composite adsorption device for agricultural wastewater treatment in this embodiment includes a mixing tank 9, and a sedimentation tank 1 is arranged around the mixing tank 9. The sedimentation tank 1 has a ring structure, and the wastewater flows into the sedimentation tank 1 for settling before flowing into the mixing tank 9.

[0021] In order to address the fact that sewage needs time to settle, and that liquid cannot be quickly settled simply by being put into the sedimentation tank 1, four dividing strips 2 are evenly distributed around the inside of the sedimentation tank 1, and the dividing strips 2 are welded and fixed to the inner wall of the sedimentation tank 1. The inside of the sedimentation tank 1 can be divided by the dividing strips 2, and the liquid can be stored independently inside the sedimentation tank 1, and the liquid can be filled into the sedimentation tank 1 one by one.

[0022] Furthermore, a screening screen 4 is provided between two adjacent dividing strips 2. The screening screen 4 is mainly used to screen out larger pollutants in the sewage to prevent larger pollutants from entering the subsequent filtration structure and causing equipment damage and blockage.

[0023] A sludge pump 5 is installed at the lower end of the screening screen 4. The sludge pump 5 is sealed to the lower end of the sedimentation tank 1. Four sludge pumps 5 are arranged around the sedimentation tank 1. The four dividing strips 2 divide the interior of the sedimentation tank 1 into four independent areas. The sludge pumps 5 extract and discharge the sludge from the four independent areas respectively.

[0024] To facilitate the introduction of wastewater into the sedimentation tank 1, a first transmission ring 6 is provided around the upper part of the outer side of the sedimentation tank 1, such as... Figure 3 and Figure 4As shown, a first roller 23 is provided at the lower end of the first transmission ring 6 facing the upper end of the sedimentation tank 1. When the first transmission ring 6 rotates and adjusts the sewage discharge position, the friction between the first transmission ring 6 and the sedimentation tank 1 is offset by the rotation of the first roller 23.

[0025] For the rotation of the first transmission ring 6, the inner wall of the first transmission ring 6 is provided with a toothed groove 7, and the toothed groove 7 is welded and fixed to the first transmission ring 6. The upper end of the mixing tank 9 is provided with a gear 8, and the outside of the gear 8 is meshed with the outside of the toothed groove 7. After the gear 8 rotates, it can drive the first transmission ring 6 to rotate through the toothed groove 7. The side of the first transmission ring 6 is provided with a first flexible hose 11, and the first transmission ring 6 is connected to a section of the first flexible hose 11 through a groove. After the first transmission ring 6 rotates, it can drive the first flexible hose 11 to change position. The change of position of the first flexible hose 11, combined with the division of the sedimentation tank 1 by the dividing strip 2, can allow the sewage to be discharged to different positions, so that the sewage can be stored in batches and have enough time to settle.

[0026] When the first hose 11 is rotated to complete the position adjustment, in order to prevent the liquid and foreign matter discharged from the first hose 11 from being retained at the upper end of the dividing strip 2, the upper end of the dividing strip 2 is provided with a slope 3. The slope 3 can deal with the liquid and foreign matter falling from the upper end, and prevent the liquid and foreign matter from being retained at the upper end of the dividing strip 2.

[0027] Regarding the division formed by the dividing strip 2 inside the sedimentation tank 1, four first valves 19 are evenly distributed around the side of the sedimentation tank 1 facing the mixing tank 9, and the first valves 19 are sealed to the sedimentation tank 1. The areas divided by the four dividing strips 2 correspond to the four first valves 19 respectively. Only after the first valves 19 are opened can the water that has been left to stand inside be discharged.

[0028] To collect the liquid discharged from the four first valves 19, a first liquid pump 22 is sealed at the inlet of the mixing tank 9. When one of the first valves 19 is opened, the first liquid pump 22 draws out the liquid. Figure 2 As shown, a third fixed pipe 21 is provided at one end of the first liquid pump 22, and a second fixed pipe 20 is provided between the third fixed pipe 21 and the four first valves 19 respectively. The two ends of the second fixed pipe 20 are respectively sealed to the third fixed pipe 21 and the first valves 19. After the first valve 19 is opened and the first liquid pump 22 is turned on, the liquid in the corresponding static area is drawn by the first liquid pump 22 and sent into the mixing tank 9.

[0029] The mixing tank 9 is used to add flocculants to the liquid, which is a conventional technical means in existing wastewater treatment. This application does not improve the method and steps of adding flocculants to the mixing tank 9, and therefore does not elaborate on the interior of the mixing tank 9.

[0030] A second liquid pump 37 is installed at the lower end of one side of the mixing tank 9. When the second liquid pump 37 is turned on, it can discharge the liquid inside the mixing tank 9 and also efficiently discharge wastewater. A first filter tank 13 is installed at the upper end of one side of the mixing tank 9, and a third filter tank 15 is installed at the lower end of the first filter tank 13. Figure 5 and Figure 6 As shown, a second filter barrel 14 is provided at the upper end of the first filter barrel 13. The liquid drawn by the second liquid pump 37 passes through the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15 one by one from top to bottom to complete the filtration.

[0031] In this embodiment, the interior of the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15 are evenly distributed with three fan-shaped mounting slots 32. Each mounting slot 32 is provided with a filter element 33. The filter element 33 is wrapped by a filter bag, which facilitates the replacement of the filter element 33 in the future.

[0032] The three filter elements 33 inside the second filter tank 14 are quartz sand filter media, fiber ball filter media, and volcanic rock filter media, respectively. The three filter elements 33 inside the first filter tank 13 are natural zeolite, salt-modified zeolite, and ion exchange resin, respectively. The three filter elements 33 inside the third filter tank 15 are activated carbon, phosphorus removal filter media, and biological ceramic particles, respectively. The three layers of filter elements 33 are distributed one by one from top to bottom, and the sewage can be filtered by passing through them one by one.

[0033] To accommodate different filtration needs, the first filter barrel 13 is equipped with connecting rings 35 at both the top and bottom ends, such as... Figure 10 and Figure 11 As shown, the upper and lower ends of the second filter barrel 14 and the upper end of the third filter barrel 15 are provided with connecting grooves 34, and the interior of the connecting grooves 34 is connected to the external sliding groove of the connecting ring 35. When the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15 are spliced, the connecting ring 35 slides into the interior of the connecting grooves 34, so that three independent liquid flow trajectories are formed from top to bottom in the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15.

[0034] To facilitate the rotation of the second filter barrel 14, the third filter barrel 15, and the first filter barrel 13, a second transmission ring 30 is provided around the outer wall of the second filter barrel 14, the third filter barrel 15, and the first filter barrel 13. The second transmission ring 30 is welded and fixed to the outer wall of the second filter barrel 14, the third filter barrel 15, and the first filter barrel 13. The protruding second transmission ring 30 facilitates the rotation of the filter element 33. Furthermore, as... Figure 7 As shown, four second rollers 31 are evenly distributed around both the upper and lower ends of the second transmission ring 30. The second rollers 31 rotate in contact with the second transmission ring 30, which can drive the internal filter element 33 to rotate.

[0035] For the connection and support of the second roller 31, a protective ring 24 is provided around the second transmission ring 30. The protective ring 24 can wrap the second transmission ring 30 and the second roller 31 to prevent foreign objects from affecting the transmission of the second transmission ring 30. The center of the second roller 31 is rotatably connected to the inner wall of the protective ring 24.

[0036] Furthermore, a pair of hydraulic telescopic rods 29 are laterally arranged at one end of the outer protective ring 24 corresponding to the third filter barrel 15 and the second filter barrel 14. Before the second roller 31 drives the filter element 33 to rotate, the hydraulic telescopic rods 29 respectively drive the second filter barrel 14 and the third filter barrel 15 to adjust their positions. After the second filter barrel 14 and the third filter barrel 15 are pushed away from the first filter barrel 13, they can be rotated in the future, which facilitates the change of position of the filter element 33.

[0037] Both sides of the first filter barrel 13 are provided with brackets 12, and the brackets 12 are welded and fixed to the protective ring 24 on the outside of the first filter barrel 13. When adjusting the position of the filter element 33, the first filter barrel 13 does not need to rotate, so the protective ring 24 on the outside of the first filter barrel 13 only needs to be connected to the bracket 12. The connection between the protective ring 24 and the bracket 12 will not hinder the rotation of the internal second roller 31. The two ends of the hydraulic telescopic rod 29 are respectively fixedly connected to the protective ring 24 and the bracket 12 by bolts.

[0038] To fix the second filter barrel 14, the first filter barrel 13, and the third filter barrel 15 after they rotate, connecting rods 26 are vertically arranged on the second transmission rings 30 of the second filter barrel 14 and the third filter barrel 15, facing the position of the first filter barrel 13. The connecting rods 26 are welded and fixed to the second transmission rings 30. Three connecting rods 26 are evenly distributed around the second filter barrel 14. Three connecting frames 27 are evenly distributed around the upper and lower ends of the outer wall of the first filter barrel 13. The connecting rods 26 slide through the connecting frames 27. After the second filter barrel 14 and the third filter barrel 15 rotate, the position of the connecting rods 26 is adjusted simultaneously. After the angle of the second filter barrel 14 and the third filter barrel 15 is adjusted, and after the second filter barrel 14 and the third filter barrel 15 are attached to the first filter barrel 13, the connecting rods 26 will slide into the interior of the connecting frames 27. The rotation of the second filter barrel 14 and the third filter barrel 15 can be restricted by the connecting frames 27 and the connecting rods 26.

[0039] Furthermore, in order to improve the tightness of the connection between the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15, a nut 28 is provided at the lower end of the outer side of the connecting rod 26, and the inside of the nut 28 is engaged with the external thread of the connecting rod 26. After the connecting rod 26 passes through the connecting frame 27, the nut 28 is rotated, and finally the nut 28 fits against the connecting frame 27, which can make the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15 fit tightly against each other.

[0040] In order to expose the mounting groove 32 inside the second filter barrel 14, a connecting cover 25 is provided at the upper end of the outer side of the second filter barrel 14. A connecting ring 35 is provided at the lower end of the connecting cover 25, and the connecting ring 35 is connected to the internal slot of the connecting groove 34. When installing and covering the mounting groove 32, the connecting cover 25 is placed on the upper end of the outer side of the mounting groove 32. The connecting cover 25 is fixedly connected to the outer wall of the second filter barrel 14 by bolts. After the connecting cover 25 is placed on the upper end of the second filter barrel 14, it is fixed by bolts.

[0041] During the filtration process, such as Figure 8 , Figure 9 and Figure 12 As shown, the three-layer, nine-element filter cartridge 33 can meet different filtration needs. When adjusting the filter cartridge 33 from top to bottom, the combination of quartz sand filter media, natural zeolite, and activated carbon is suitable for general farmland drainage with complex composition, ensuring comprehensive purification of water quality before disinfection. The quartz sand filter media stably intercepts the flocs produced by flocculation, the natural zeolite adsorbs ammonia nitrogen, and the activated carbon deeply adsorbs residual pesticides, dissolved organic matter, and odors.

[0042] The combination of quartz sand filter media, natural zeolite, and phosphorus removal filter media is adapted to the needs of enhanced nitrogen and phosphorus removal. Quartz sand filter media ensures smooth filtration, natural zeolite removes nitrogen, and phosphorus removal filter media specifically captures phosphate through chemical action. This is a key step in preventing eutrophication of water bodies, especially for typical eutrophic wastewater caused by chemical fertilizers or aquaculture.

[0043] The combination of quartz sand filter media, natural zeolite, and bio-ceramic particles is suitable for biochemical stabilization requirements. Quartz sand filter media completes physical interception, natural zeolite rapidly reduces ammonia nitrogen load, and bio-ceramic particles provide a carrier for microorganisms to degrade biodegradable organic matter over a long period of time and further convert ammonia nitrogen. It is suitable for wastewater with high organic matter concentration and good biodegradability, and can reduce the chemical burden of subsequent disinfection.

[0044] Fiber ball filter media, natural zeolite, and activated carbon are suitable for high-load treatment needs. Fiber ball filter media can handle high concentrations and fine flocculants, and prevents natural zeolite and activated carbon from clogging. It is suitable for high-turbidity and high-organic-content wastewater discharged from agricultural product processing plants, etc.

[0045] Fiber ball filter media, natural zeolite, and phosphorus removal filter media are suitable for treating high-turbidity, high-nitrogen and high-phosphorus wastewater. Fiber ball filter media undertakes the main solid-liquid separation, while natural zeolite and phosphorus removal filter media precisely remove nitrogen and phosphorus. They are specifically designed to treat aquaculture wastewater and eutrophic pond water, and are the core guarantee for achieving nitrogen and phosphorus discharge standards.

[0046] Fiber ball filter media, natural zeolite, and bio-ceramic granules are suitable for high-load biological start-up requirements. Fiber ball filter media protects the downstream biological unit, natural zeolite adsorbs some ammonia nitrogen, and bio-ceramic granules cultivate biofilm for long-term biochemical treatment. It is suitable for high organic load wastewater that has undergone pretreatment and is expected to operate stably by biological methods.

[0047] In the combination of volcanic rock filter media, natural zeolite and activated carbon, the rough surface of the volcanic rock filter media can adhere flocs and begin biofilm formation, which is suitable for wastewater with large suspended particles and complex composition, and can improve the overall adsorption capacity.

[0048] In the combination of volcanic rock filter media, natural zeolite and phosphorus removal filter media, the volcanic rock filter media provides primary filtration and has micro-adsorption properties, the natural zeolite removes ammonia nitrogen, and the phosphorus removal filter media chemically locks in phosphorus. This combination is suitable for wastewater with high nitrogen and phosphorus content and containing a certain amount of particulate matter.

[0049] In the combination of volcanic rock filter media, natural zeolite, and bio-ceramic particles, the dual biological carriers of volcanic rock filter media and bio-ceramic particles construct a powerful biofilm system, which works synergistically with natural zeolite to achieve efficient biological denitrification and carbon removal. It is suitable for mixed water of rural domestic sewage and agricultural wastewater that requires long-term and low-cost operation and has good biodegradability.

[0050] It offers a variety of combinations and can be adapted to different filtration needs by rotating the filter element 33.

[0051] The lower end of the third filter tank 15 is equipped with a disinfection pool 10. Wastewater passing through the filter element 33 can be transferred to the disinfection pool 10 for disinfection. In order to facilitate the transfer of wastewater, three second hoses 17 are evenly distributed around the upper end of the connecting cover 25. The sealing connection position of the second hoses 17 and the connecting cover 25 overlaps with the position of the mounting groove 32. After the filter element 33 is rotated, the liquid can be controlled to flow into which second hose 17, and the liquid can be controlled to contact which filter element 33.

[0052] In addition, three third hoses 18 are evenly distributed around the lower end of the third filter barrel 15. After contacting the filter element 33 from top to bottom, the liquid is finally discharged through the third hoses 18. The third hoses 18 and the third filter barrel 15 are sealed together by the second valve 36. The second hose 17 and the connecting cover 25 are sealed together by the second valve 36. The liquid flow trajectory can be adjusted by opening and closing the second valve 36, so that the liquid can flow from top to bottom according to the set trajectory.

[0053] The upper ends of the three second hoses 17 are sealed and connected by the first fixed pipe 16. One end of the first fixed pipe 16 is sealed and connected to the second liquid pump 37. After the second liquid pump 37 draws liquid from the mixing tank 9, the drawn liquid can be transmitted through the first fixed pipe 16 and sent to the position of the second hoses 17. Subsequently, only the opening of the second valve 36 needs to be adjusted to complete the filtration and transmission of sewage.

[0054] Working principle: External liquid is transferred to the sedimentation tank 1 through the first hose 11. Gear 8 rotates after being driven by a motor. Gear 8 drives the first transmission ring 6 connected to the first hose 11 to rotate through the tooth groove 7. The rotation of the first transmission ring 6 adjusts the position of the liquid falling after adjusting the first hose 11. After the liquid is initially filtered by the screening screen 4, it enters the sedimentation tank 1. After the liquid settles, the sediment can be pumped out by the sludge pump 5. After the first valve 19 on the inner wall of the sedimentation tank 1 is opened, the first liquid pump 22 is started. The first liquid pump 22 pumps out the settled liquid, allowing the liquid to enter the mixing tank 9. The second roller 31 is driven by a motor and drives the first filter barrel 13, the second filter barrel 14, and the third filter barrel 15 to rotate through the second transmission ring 30. The position of the different filter elements 33 inside the first filter barrel 13, the second filter barrel 14, and the third filter barrel 15 is adjusted longitudinally. The hydraulic telescopic rod 29 extends and pushes the second filter barrel 14 and the third filter barrel 15 respectively while being clamped by the second roller 31. The connecting groove 34 at the upper end of the third filter barrel 15 and the connecting groove 34 at the lower end of the second filter barrel 14 are respectively connected to the connecting rings 35 at the upper and lower ends of the first filter barrel 13. At the same time, the connecting rod 26 is inserted into the connecting frame 27, and the nut 28 is rotated outside the connecting rod 26 to further fix the connection between the third filter barrel 15, the first filter barrel 13 and the second filter barrel 14. The flocculant is put into the mixing tank 9 to contact the liquid drawn by the first liquid pump 22. The liquid is transferred into the first fixed pipe 16 by the second liquid pump 37. The two second valves 36 in the longitudinal liquid flow trajectory are opened. The liquid transferred in the first fixed pipe 16 flows into the second filter barrel 14, the first filter barrel 13 and the third filter barrel 15 through the second hose 17, and contacts the filter element 33 after the position is adjusted one by one to complete the filtration. The filtered liquid flows out from the third filter barrel 15 and is transferred to the disinfection tank 10 for filtration along the third hose 18. The filtered liquid is discharged from the disinfection tank 10 to complete the wastewater treatment.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A composite adsorption device for agricultural wastewater treatment, comprising a mixing tank (9), characterized in that, A first filter barrel (13) is provided at the upper end of one side of the mixing tank (9). A second filter barrel (14) and a third filter barrel (15) are provided at the upper and lower ends of the first filter barrel (13), respectively. Three fan-shaped mounting grooves (32) are evenly distributed around the interior of the second filter barrel (14), the first filter barrel (13) and the third filter barrel (15). Filter elements (33) are provided inside the mounting grooves (32). A second transmission ring (30) is welded around the outer wall of the second filter barrel (14), the third filter barrel (15) and the first filter barrel (13). Four second rollers (31) are evenly distributed around the upper and lower ends of the second transmission ring (30). A protective ring (24) is arranged around the second transmission ring (30). A pair of hydraulic telescopic rods (29) are arranged laterally on the outer side of the third filter barrel (15) and the second filter barrel (14) corresponding to one end of the protective ring (24).

2. The composite adsorption device for agricultural wastewater treatment according to claim 1, characterized in that, The first filter barrel (13) is provided with brackets (12) on both sides, and the brackets (12) are welded and fixed to the protective ring (24) outside the first filter barrel (13). The two ends of the hydraulic telescopic rod (29) are respectively fixedly connected to the protective ring (24) and the bracket (12) by bolts.

3. The composite adsorption device for agricultural wastewater treatment according to claim 2, characterized in that, The second filter barrel (14) and the third filter barrel (15) are both vertically arranged with connecting rods (26) facing the first filter barrel (13) on the outer second transmission ring (30). There are three connecting rods (26) evenly distributed around the first filter barrel (13). There are three connecting frames (27) evenly distributed around the upper and lower ends of the outer wall of the first filter barrel (13). The connecting rods (26) slide through the connecting frames (27). The lower end of the connecting rods (26) is provided with a nut (28) with thread engagement.

4. The composite adsorption device for agricultural wastewater treatment according to claim 3, characterized in that, The first filter barrel (13) is provided with connecting rings (35) at both the upper and lower ends. The second filter barrel (14) and the third filter barrel (15) are provided with connecting grooves (34) at both the upper and lower ends. The interior of the connecting groove (34) is connected to the sliding groove of the connecting ring (35). The upper end of the exterior of the second filter barrel (14) is provided with a connecting cover (25). The lower end of the connecting cover (25) is provided with a connecting ring (35). The connecting ring (35) is connected to the internal groove of the connecting groove (34). The connecting cover (25) is fixedly connected to the outer wall of the second filter barrel (14) by bolts.

5. The composite adsorption device for agricultural wastewater treatment according to claim 4, characterized in that, The upper end of the connecting cover (25) is evenly distributed with three second hoses (17), and the lower end of the third filter barrel (15) is evenly distributed with three third hoses (18). The third hoses (18) and the third filter barrel (15) are sealed together by a second valve (36), and the second hoses (17) and the connecting cover (25) are sealed together by a second valve (36).

6. The composite adsorption device for agricultural wastewater treatment according to claim 5, characterized in that, A sedimentation tank (1) is arranged around the mixing tank (9). Four dividing strips (2) are evenly distributed around the interior of the sedimentation tank (1). A first transmission ring (6) is arranged around the upper end of the sedimentation tank (1). A first roller (23) is arranged at the lower end of the first transmission ring (6) facing the upper end of the sedimentation tank (1). A toothed groove (7) is arranged around the inner wall of the first transmission ring (6). A gear (8) is arranged at the upper end of the mixing tank (9), and the outside of the gear (8) is meshed with the outside of the toothed groove (7). A first flexible hose (11) is arranged on the side of the first transmission ring (6).

7. The composite adsorption device for agricultural wastewater treatment according to claim 6, characterized in that, The three filter elements (33) inside the second filter barrel (14) are quartz sand filter media, fiber ball filter media and volcanic rock filter media, respectively. The three filter elements (33) inside the first filter barrel (13) are natural zeolite, salt-modified zeolite and ion exchange resin, respectively. The three filter elements (33) inside the third filter barrel (15) are activated carbon, phosphorus removal filter media and bio-ceramic particles, respectively.

8. The composite adsorption device for agricultural wastewater treatment according to claim 7, characterized in that, The filter element (33) is wrapped by a filter bag.

9. A method for implementing a composite adsorption device for agricultural wastewater treatment based on any one of claims 1-8, characterized in that, Includes the following steps: Step 1: External liquid is transferred to the sedimentation tank (1) through the first hose (11). The gear (8) drives the first transmission ring (6) connected to the first hose (11) to rotate through the tooth groove (7). The first transmission ring (6) rotates to adjust the first hose (11) and then adjusts the position where the liquid falls. Step 2: After the liquid is initially filtered by the screening screen (4), it enters the sedimentation tank (1). The sediment can be pumped out by the sludge pump (5). After the first valve (19) on the inner wall of the sedimentation tank (1) is opened, the first liquid pump (22) is started. The first liquid pump (22) pumps out the settled liquid, so that the liquid enters the mixing tank (9). Step 3: After being driven by the motor, the second roller (31) drives the first filter barrel (13), the second filter barrel (14) and the third filter barrel (15) to rotate through the second transmission ring (30); Step 4: The hydraulic telescopic rod (29) extends and pushes the second filter barrel (14) and the third filter barrel (15) while being held by the second roller (31). The connecting groove (34) at the upper end of the third filter barrel (15) and the connecting groove (34) at the lower end of the second filter barrel (14) are respectively connected to the connecting rings (35) at the upper and lower ends of the first filter barrel (13). At the same time, the connecting rod (26) is inserted into the connecting frame (27), and the nut (28) is rotated outside the connecting rod (26). Step 5: Add the flocculant into the mixing tank (9) to contact the liquid drawn by the first liquid pump (22). The liquid is transferred to the inside of the first fixed pipe (16) by the second liquid pump (37). Open the two second valves (36) in the longitudinal liquid flow trajectory. The liquid transferred in the first fixed pipe (16) flows into the second filter barrel (14), the first filter barrel (13) and the third filter barrel (15) through the second hose (17). Contact the filter element (33) after the position is adjusted one by one to complete the filtration. Step 6: The filtered liquid flows out from the third filter tank (15) and is transported along the third hose (18) to the disinfection tank (10) for filtration. The filtered liquid is discharged from the disinfection tank (10) to complete the wastewater treatment.

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