Farmland recession multi-stage filtering system

Abstract

The utility model discloses a farmland recession multi-stage filtering system, which relates to the technical field of agricultural environmental protection and comprises a filtering area, a buffer area and a purifying area which are sequentially arranged along the water flow direction, a water inlet groove is arranged at the front end of the filtering area, and a water outlet groove is arranged at the rear end of the purifying area. A water through groove is formed between the filtering area and the buffering area, a water guide pipe is arranged between the buffering area and the purifying area, and a submersible pump and a one-way valve are installed on the water guide pipe. By arranging the filtering area, the buffering area and the purifying area and adopting a multi-stage filtering and treating mode, pollutants such as silt, suspended solids, chemical fertilizer residues and pesticide residues in farmland recession can be effectively removed, water body pollution is reduced, and the ecological environment is protected; a medicament adding assembly and a stirring assembly are arranged in the purification area, so that the purified liquid medicine can be uniformly sprayed into water, the liquid medicine and the water are fully mixed through stirring, the chemical reaction effect is improved, and harmful chemical substances dissolved in the water are further removed.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural environmental protection technology, specifically relating to a multi-stage filtration system for farmland drainage. Background Technology

[0002] Agricultural runoff refers to wastewater and liquid waste discharged during agricultural production processes such as crop cultivation, livestock feeding, and food processing. It primarily contains various microorganisms, suspended solids, fertilizers, pesticides, insoluble solids, and salts, among other biological and chemical pollutants. Agricultural runoff is a non-point source of water pollution; it is widespread and dispersed, affecting surface water bodies through various channels. Direct discharge can cause serious water pollution, impacting the ecological environment and human health.

[0003] Existing farmland runoff treatment systems mostly employ single-stage filtration or simple sedimentation, resulting in limited effectiveness and difficulty in removing various pollutants, especially dissolved chemicals. Furthermore, traditional filtration systems are prone to filter media clogging after prolonged use, making cleaning and maintenance inconvenient and impacting the system's continuous operational efficiency. Therefore, there is an urgent need for a multi-stage filtration system that can efficiently treat farmland runoff, reduce water pollution, and is easy to maintain. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a high-efficiency, automated and easy-to-maintain multi-stage filtration system for farmland runoff, which can effectively reduce the pollution of farmland runoff to the environment and improve the water purification effect.

[0005] The solution adopted by this utility model to solve its technical problem is: a multi-stage filtration system for farmland drainage, the drainage filtration system includes a filtration zone, a buffer zone, and a purification zone, the filtration zone, the buffer zone, and the purification zone are arranged sequentially according to the water flow direction, a water inlet trough is provided at the front end of the filtration zone, a water passage trough is provided between the filtration zone and the buffer zone, a water guide pipe is provided between the buffer zone and the purification zone, a submersible pump and a one-way valve are installed on the water guide pipe, a discharge pipe is connected to the tail end of the purification zone, a filtration unit is provided in the filtration zone, a chemical addition component and a stirring component are provided in the purification zone, a sealing plate is fitted in the buffer zone, a hydraulic cylinder is vertically installed on the bracket, the output end of the hydraulic cylinder is fixedly connected to the top of the sealing plate, used to control the lifting and lowering of the sealing plate, a lifting valve is slidably fitted on the water inlet trough, and a gate opening and closing mechanism for controlling the lifting and lowering of the lifting valve is provided in the drainage filtration system.

[0006] Furthermore, the filtration unit includes a filter frame, a microporous filter plate, and an activated carbon filter plate arranged sequentially in the direction of water flow within the filtration zone. Slots are provided on the side wall of the filtration zone, and the filter frame, microporous filter plate, and activated carbon filter plate are respectively inserted into the slots.

[0007] Furthermore, the gate opening and closing mechanism includes a drive motor installed on the outside of the water inlet trough, a screw fixedly connected to the upper output end of the drive motor, a nut threaded on the screw connected to the lifting valve, a guide rod longitudinally fixed on the water inlet trough, and a guide sleeve slidably fitted on the guide rod connected to the lifting valve.

[0008] Furthermore, the reagent addition assembly includes a reagent tank placed on a support, a metering pump fixedly mounted on the support, a liquid guide tube connected to the input and output ends of the metering pump, the liquid guide tube at the input end being connected to the reagent tank, and spray nozzles fixed on both sides above the purification zone, the liquid guide tube at the output end being connected to the spray nozzles.

[0009] Furthermore, the stirring assembly includes a stirring motor installed outside the purification zone. A horizontally arranged transmission shaft is fixedly mounted on the output end of the stirring motor. A bevel gear one is fixedly mounted on the inner end of the transmission shaft. A stirring shaft is longitudinally mounted on the center of the purification zone, and a bevel gear two that meshes with bevel gear one is fixedly mounted on the stirring shaft.

[0010] Furthermore, a level gauge is installed near the top of the purification area, and the level gauge is connected to a metering pump, a submersible pump, and a check valve.

[0011] Furthermore, photovoltaic panels are installed on the bracket.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Multi-stage filtration for efficient removal of pollutants: This utility model, by setting up a filtration zone, a buffer zone and a purification zone, adopts a multi-stage filtration and treatment method, which can effectively remove pollutants such as mud, suspended solids, fertilizer residues, and pesticide residues from farmland runoff, reduce water pollution and protect the ecological environment.

[0014] Automated operation reduces human intervention: The system is equipped with automated control devices such as level gauges, metering pumps, submersible pumps, and check valves, which can automatically adjust the filtration and purification process according to the water level and flow rate, reducing manual operation and improving processing efficiency. In addition, the system is also equipped with photovoltaic panels to use solar energy to power the system, further reducing operating costs.

[0015] Backwashing function extends service life: By setting a sealing plate and hydraulic cylinder in the buffer zone, the system can realize the backwashing function of the filter unit, automatically clean the filter media, prevent clogging, extend the service life of the filter, and reduce maintenance costs;

[0016] Adding and stirring chemicals enhances the purification effect: The purification zone is equipped with chemical adding components and stirring components, which can evenly spray the purification solution into the water and stir to fully mix the solution with the water, thereby enhancing the chemical reaction effect and further removing harmful chemicals dissolved in the water.

[0017] Flow regulation for flexible response to different water volumes: The inlet tank is equipped with lifting valves and gate opening and closing mechanisms, which can automatically adjust the inlet flow rate according to the water level in the buffer zone, ensuring stable operation of the system under different water volume conditions and avoiding the impact on treatment effect due to excessive or insufficient water volume. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional sectional view of the present invention.

[0020] Figure 3 This is a frontal sectional view of the present invention.

[0021] Figure 4 This is a schematic diagram of the gate opening and closing mechanism of this utility model.

[0022] In the diagram: 1. Drainage filtration system; 11. Inlet tank; 12. Filtration zone; 13. Buffer zone; 14. Purification zone; 15. Water passage tank; 16. Water guide pipe; 17. Discharge pipe; 18. Lifting valve; 2. Filtration unit; 21. Filter frame; 22. Microporous filter plate; 23. Activated carbon filter plate; 3. Sealing plate; 4. Support; 5. Hydraulic cylinder; 6. Chemical addition component; 61. Chemical tank; 62. Metering pump; 63. Liquid guide pipe; 64. Spray pipe; 7. Stirring component; 71. Stirring motor; 72. Drive shaft; 73. Bevel gear one; 74. Stirring shaft; 75. Bevel gear two; 8. Level gauge; 9. Gate opening and closing mechanism; 91. Drive motor; 92. Screw; 93. Nut; 94. Guide rod; 95. Guide sleeve; 10. Photovoltaic panel. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1-4 This utility model provides a technical solution for a multi-stage filtration system for farmland drainage: Example

[0025] according to Figure 1 , Figure 2 and Figure 3As shown, the wastewater filtration system 1 mainly includes a filtration zone 12, a buffer zone 13, and a purification zone 14. An inlet trough 11 is located at the front end of the filtration zone 12, adjoining the farmland ditch. Farmland wastewater flows into the wastewater filtration system 1 through the inlet trough 11 for purification and filtration before discharge. Multiple baffles are installed within the wastewater filtration system 1, dividing it into the filtration zone 12, buffer zone 13, and purification zone 14, arranged sequentially according to the water flow direction. A filtration unit 2 is installed within the filtration zone 12. A water passage trough 15 is opened at the bottom of the baffle between the filtration zone 12 and the buffer zone 13. Farmland wastewater first passes through the filtration unit 2 for filtration and then flows into the buffer zone 13 through the water passage trough 15.

[0026] A reagent addition component 6 is installed within the purification zone 14. A water guide pipe 16 is installed on the partition between the buffer zone 13 and the purification zone 14, and a submersible pump and a one-way valve are installed on the water guide pipe 16. Water in the buffer zone 13 flows into the purification zone 14 through the water guide pipe 16 for purification treatment. A discharge pipe 17 is connected to the end of the purification zone 14, and a main valve is installed on the discharge pipe 17. Finally, the filtered and purified farmland runoff is discharged to the outside through the discharge pipe 17.

[0027] The filtration unit 2 includes a filter frame 21, a microporous filter plate 22, and an activated carbon filter plate 23 arranged sequentially in the direction of water flow within the filtration zone 12. Slots are provided on the side wall of the filtration zone 12, and the filter frame 21, microporous filter plate 22, and activated carbon filter plate 23 are respectively inserted into these slots. The filter frame 21 is used to filter and isolate large particles of debris, such as stones and mud, in farmland runoff. The filter frame 21 has a frame-like structure with its opening facing the inlet direction. Wastewater entering the runoff filtration system 1 is first filtered through the filter frame 21, which traps large particles. After all the runoff has been treated, the filter frame 21 can be directly removed to clean the debris inside. The microporous filter plate 22 is located behind the filter frame 21 and is used to filter suspended solids, particulate matter, and bacteria in the water. The activated carbon filter plate 23 is located behind the microporous filter plate 22 and is used to filter and adsorb organic matter and odors in the water. After being filtered by filter unit 2, the farmland runoff can effectively remove particulate matter, organic matter and other substances from the water.

[0028] A support frame 4 is fixedly installed above the filtration system 1. A reagent addition assembly 6 is installed in the purification zone 14. The reagent addition assembly 6 includes a reagent tank 61 placed on the support frame 4. A metering pump 62 is fixedly installed on the support frame 4. The input and output ends of the metering pump 62 are respectively connected to liquid guide pipes 63. The liquid guide pipe 63 at the input end is connected to the reagent tank 61. Spray pipes 64 are fixed on both sides above the purification zone 14. The liquid guide pipe 63 at the output end is connected to the spray pipes 64. The filtered water flows into the purification zone 14 through the buffer zone 13. The metering pump 62 starts and sprays the purification solution in the reagent tank 61 into the purification zone 14 through the spray pipes 64. The water is then purified in a secondary manner by mixing the solution with the water to remove harmful chemicals dissolved in the water.

[0029] To improve the purification effect, a stirring assembly 7 is also installed in the purification zone 14. The stirring assembly 7 includes a stirring motor 71 mounted on the outside of the purification zone 14 via a motor frame. A drive shaft 72, horizontally positioned within the purification zone 14, is fixedly mounted at the output end of the stirring motor 71, and a bevel gear 73 is fixedly mounted at the inner end of the drive shaft 72. A stirring shaft 74 is longitudinally rotatably mounted at the center of the purification zone 14 via a bearing seat, and a second bevel gear 75, meshing with the first bevel gear 73, is fixedly mounted on the stirring shaft 74. By starting the stirring motor 71, the drive shaft 72 and the first bevel gear 73 are driven to rotate. Under the meshing of the first bevel gear 73 and the second bevel gear 75, the stirring shaft 74 is driven to rotate. The stirring rods distributed on the stirring shaft 74 stir the water in the purification zone 14, ensuring thorough mixing of the water and the reagent, thereby improving the rate and effect of the purification reaction.

[0030] A photovoltaic panel 10 is installed on the bracket 4 of the water discharge filtration system 1. The photovoltaic panel 10 can absorb sunlight and convert it into electrical energy to provide power for the operation of the system.

[0031] In practical use, this utility model provides a multi-stage filtration system for farmland drainage. Farmland drainage is pumped to the inlet trough 11 by a ditch pump and then enters the drainage filtration system 1 through the inlet trough 11. After entering the drainage filtration system 1, the wastewater first flows into the filtration zone 12, where it undergoes primary filtration and purification through the filtration unit 2. The filtered water then flows through the water passage 15 to the buffer zone 13 for temporary storage. After the previous batch of water in purification zone 14 has been purified and discharged, the submersible pump and check valve on the water guide pipe 16 are opened, allowing water in buffer zone 13 to flow into purification zone 14. Then, the metering pump 62 starts, spraying the purification solution in the reagent tank 61 into purification zone 14 through the nozzle 64. Simultaneously, the stirring motor 71 starts, driving the drive shaft 72 and bevel gear 73 to rotate. Under the meshing of bevel gear 73 and bevel gear 75, the stirring shaft 74 rotates, stirring the water in purification zone 14 to ensure thorough mixing and reaction of the water and reagent. This secondary reaction purification removes harmful chemicals dissolved in the water. Finally, the main valve on the discharge pipe 17 is opened, and the water after secondary purification is discharged to the outside. Example

[0032] Based on Embodiment 1, since the multiple filter plates in filter unit 2 become clogged after prolonged use and require timely cleaning, manual cleaning is time-consuming and labor-intensive, and will also delay the drainage treatment of farmland. To solve this problem, such as Figure 3 As shown, a sealing plate 3 is fitted inside the buffer zone 13. A sealing gasket is provided around the perimeter of the sealing plate 3, so that the sealing plate 3 is sealed and fitted inside the buffer zone 13. A hydraulic cylinder 5 is vertically mounted on the bracket 4, and the output end of the hydraulic cylinder 5 is fixedly connected to the top of the sealing plate 3.

[0033] In practical use, this utility model of a multi-stage filtration system for farmland drainage involves keeping the one-way valve of the water guide pipe 16 closed when the filter unit 2 needs cleaning, and driving the hydraulic cylinder 5 to operate. The hydraulic cylinder 5 controls the sealing plate 3 to move downward, and the sealing plate 3 presses the filtered water in the buffer zone 13 back into the filter zone 12. As the water pressure increases, the filtered water flows in the opposite direction through the filter unit 2, backwashing the filter plates in the filter unit 2, thereby realizing the automatic cleaning of the filter unit 2 during the farmland drainage process. Example

[0034] Based on Example 1, such as Figure 3 and Figure 4As shown, a lift valve 18 is installed in the inlet tank 11 near the inlet of the filtration zone 12. A through groove is opened above the inlet tank 11, and sealing gaskets are installed around the through groove. The lift valve 18 is sealed and fitted inside the through groove. A gate opening and closing mechanism 9 is installed on the return water filtration system 1. The gate opening and closing mechanism 9 can control the opening and closing of the lift valve 18, thereby controlling the water flow. The specific structure of the gate opening and closing mechanism 9 is as follows. Figure 4 As shown, the device includes a drive motor 91 installed on the outside of the water inlet tank 11. A screw 92 is fixedly connected to the upper output end of the drive motor 91. A nut 93 is threaded onto the screw 92 and is connected to the lifting valve 18. Two guide rods 94 are also fixed longitudinally on the water inlet tank 11. A guide sleeve 95 is slidably fitted onto the guide rods 94 and is connected to the lifting valve 18.

[0035] In practical use, this utility model's multi-stage filtration system for farmland drainage uses a drive motor 91 to control the rotation of a screw 92. The screw 92 and nut 93, through their threaded engagement, drive the lifting valve 18 to move. A guide rod 94 and guide sleeve 95 provide guidance for the movement of the lifting valve 18, ensuring its smooth and directional movement. By adjusting the height of the lifting valve 18, the size of the water inlet opening in the inlet tank 11 is controlled, thus regulating the water treatment flow rate within the drainage filtration system 1. When the buffer zone 13 is full, the lifting valve 18 completely closes, and no more water enters the drainage filtration system 1. When the buffer zone 13 is emptied, the lifting valve 18 reopens, and the drainage filtration system 1 begins to receive water again. Example

[0036] Based on Example 1, a level gauge 8 is installed near the top of the purification zone 14. Filtered water in the buffer zone 13 flows into the purification zone 14 through the open water pipe 16 for purification. When the water level in the purification zone 14 rises to the height that submerges the level gauge 8, the level gauge 8 sends a signal to control the submersible pump and check valve on the water pipe 16 to close, and at the same time controls the metering pump 62 to start, adding a metered amount of agent into the purification zone 14, thereby realizing the automated control of the farmland drainage purification operation.

[0037] The above description is only a preferred embodiment of the present utility model and does not limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An agricultural field runoff water multi-stage filtration system, the runoff water filtration system (1) comprising a filtration zone (12), a buffer zone (13) and a purification zone (14), characterized in that: The filtering area (12), the buffer area (13) and the purification area (14) are sequentially arranged in the water flow direction, the front end of the filtering area (12) is provided with a water inlet groove (11), a water channel (15) is arranged between the filtering area (12) and the buffer area (13), a water guide pipe (16) is arranged between the buffer area (13) and the purification area (14), a submersible pump and a one-way valve are installed on the water guide pipe (16), the tail of the purification area (14) is connected with a discharge pipe (17), the filtering area (12) is provided with a filtering unit (2), the purification area (14) is provided with a medicament adding assembly (6) and a stirring assembly (7), the buffer area (13) is sealingly matched with a sealing plate (3), a hydraulic cylinder (5) is vertically installed on a support (4), the output end of the hydraulic cylinder (5) is fixedly connected above the sealing plate (3) and is used for controlling the lifting of the sealing plate (3), the water inlet groove (11) is slidingly matched with a lifting valve (18), and the water outlet filtering system (1) is provided with a gate opening and closing mechanism (9) for controlling the lifting of the lifting valve (18).

2. The multi-stage filtration system for agricultural field runoff water according to claim 1, wherein: The filtering unit (2) comprises a filtering frame (21), a microporous filter plate (22) and an activated carbon filter plate (23) which are sequentially arranged in the filtering area (12), and the filtering frame (21), the microporous filter plate (22) and the activated carbon filter plate (23) are respectively inserted into the insertion slots.

3. The multi-stage filtration system for agricultural field runoff water of claim 1, wherein: The gate opening and closing mechanism (9) comprises a driving motor (91) installed outside the water inlet groove (11), a screw rod (92) fixedly connected to the output end of the driving motor (91), a nut (93) threadedly sleeved on the screw rod (92) and connected with the lifting valve (18), and a guide rod (94) fixedly arranged on the water inlet groove (11) in the longitudinal direction, and a guide sleeve (95) slidingly sleeved on the guide rod (94) and connected with the lifting valve (18).

4. The multi-stage filtration system for agricultural field runoff water of claim 1, wherein: The medicament adding assembly (6) comprises a medicament box (61) placed on the support (4), a dosing pump (62) fixedly installed on the support (4), liquid guide pipes (63) connected with the input end and the output end of the dosing pump (62), respectively, the liquid guide pipe (63) of the input end connected with the medicament box (61), spray pipes (64) fixedly arranged on the two sides of the top of the purification area (14), and the liquid guide pipe (63) of the output end connected with the spray pipes (64).

5. The multi-stage filtration system for agricultural field runoff water of claim 4, wherein: The stirring assembly (7) comprises a stirring motor (71) installed outside the purification area (14), a horizontal transmission shaft (72) fixedly sleeved on the output end of the stirring motor (71), a bevel gear one (73) fixedly sleeved on the inner end of the transmission shaft (72), a stirring shaft (74) rotationally sleeved in the center of the purification area (14) in the longitudinal direction, and a bevel gear two (75) fixedly sleeved on the stirring shaft (74) and engaged with the bevel gear one (73).

6. The multi-stage filtration system for agricultural field runoff water of claim 1, wherein: A liquid level meter (8) is installed on the purification area (14) close to the top, and the liquid level meter (8) is signal connected with the dosing pump (62), the submersible pump and the one-way valve.

7. The multi-stage filtration system for agricultural field runoff water of claim 1, wherein: A photovoltaic panel (10) is installed on the support (4).

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