Wastewater treatment and recycling device for ecological agricultural construction

Abstract

The utility model discloses an ecological agricultural construction wastewater treatment recycling device, including filter tank, hydrocyclone, dissolved air tank and contact pool, and the connecting pipe of above each part, the surface of the side water outlet pipe of dissolved air tank is fixed with dissolved air release ware, and the other end of this dissolved air release ware is fixedly connected with contact pool, the bottom of contact pool is connected with separation tank, the bottom middle part of separation tank is fixed with rotating electrical machine, and the output shaft end part rotationally connected with the shaft of rotating electrical machine is fixed with the scraper plate for scraping the dross through the bolt in the side of shaft. Dissolved air tank makes air dissolve in water in large quantities through pressurization, and then a large number of micro bubbles are produced through dissolved air release ware and flow into contact pool, and the bubbles adhere to the surface of suspended matter, form the'bubble - particle'complex, and the overall density is less than water, and these complexes float rapidly to the water surface, form the dross layer, and the scraper plate is convenient for removing.

Description

Technical Field

[0001] This utility model belongs to the field of ecological agriculture technology, specifically relating to a wastewater treatment and reuse device for ecological agricultural construction. Background Technology

[0002] With the acceleration of agricultural modernization in my country, the contradiction between water supply and demand is becoming increasingly prominent. Agricultural production and construction, such as large-scale greenhouse seedling cultivation, livestock farm cleaning, and irrigation of facility agriculture, generate large amounts of wastewater rich in nitrogen and phosphorus. Direct discharge of this wastewater not only wastes water resources but also causes non-point source pollution. At the same time, agricultural irrigation water consumption continues to rise, and the problem of groundwater over-extraction is severe. Against this backdrop, the research and development and promotion of wastewater reuse devices for agricultural construction are particularly urgent. This device effectively collects and specifically purifies production wastewater to meet agricultural reuse standards, transforming the original "waste liquid" into a stable "second water source." This has significant practical implications for alleviating regional water resource pressure, reducing environmental pollution, and promoting the construction of water-saving ecological agriculture.

[0003] A search revealed a Chinese patent publication number CN 216023510 U, which discloses a wastewater treatment device for ecological agricultural construction. The device includes a base, a receiving box fixedly installed on the top of the base, and a cleaning mechanism fixedly installed inside the receiving box. The cleaning mechanism includes a fixed frame, a quartz sand filter, bidirectional screws, a slider, a connecting plate, a vibrator, and a vacuum cleaner. The fixed frame is fixedly installed inside the receiving box, the quartz sand filter is fixedly installed inside the fixed frame, and two bidirectional screws are fixedly installed inside the fixed frame.

[0004] The aforementioned patent has the following shortcomings: For complex agricultural wastewater, which may contain some oil and fine particles, filtration using only a filter screen cannot effectively remove substances such as oil, which has a significant impact on the final effluent quality.

[0005] To address this, a wastewater treatment and reuse device for ecological agricultural construction is proposed, which can effectively remove oil from agricultural wastewater, so that the final effluent can be directly used for agricultural production with higher requirements, such as agricultural irrigation. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide a method that can effectively remove oil, fine particles and other substances contained in wastewater, which is an effective supplement to the sedimentation process and allows the treated water to be directly used in various agricultural production processes.

[0007] To address one or more of the above-mentioned deficiencies or improvement needs in the existing technology, this utility model provides a wastewater treatment and reuse device for ecological agricultural construction, including a filter tank, a hydrocyclone, a dissolved air tank, and a contact tank, as well as connecting pipes for each of the above components; a dissolved air release device is fixedly installed on the surface of the side outlet pipe of the dissolved air tank, and the other end of the dissolved air release device is fixedly connected to the contact tank; an electric shut-off valve is fixedly installed on the surface of the outlet pipe at the bottom of the contact tank, and the other end of the electric shut-off valve is fixedly connected to a separation tank through a connecting pipe and a flange; a partition is fixedly installed on the inner wall of the separation tank, which divides the interior of the separation tank into a scum tank, and a scum discharge pipe is fixedly installed on the side of the scum tank; a rotary motor is fixedly installed in the middle of the bottom of the separation tank, and a rotating shaft is rotatably connected to the end of the output shaft of the rotary motor, and a scraper for scraping off scum is fixedly installed on the side of the rotating shaft by bolts.

[0008] In some embodiments, a first three-way valve is fixedly connected to the outlet pipe on the side of the separation tank via a flange. The first port of the first three-way valve is fixedly connected to the outlet pipe via a flange, and the second port is fixedly connected to a second three-way valve via a connecting pipe and a flange. A second water pump is fixedly installed on the top of the second three-way valve. The first port of the second three-way valve is fixedly connected to the inlet via a flange, and the second port is fixedly connected to the inlet pipe of the dissolved air tank via a flange.

[0009] In some embodiments, a wastewater inlet is bolted to the top of the filter tank, and a waste tank is bolted to the bottom of the filter tank.

[0010] In some embodiments, a first filter grid and a second filter grid inclined toward the waste pool are fixedly installed inside the filter pool by bolts, wherein the first filter grid is located above the second filter grid.

[0011] In some embodiments, the side of the filter tank has holes at the top of the second filter grid, and a flushing pipe is fixed to the inner wall of the holes by bolts, and a flushing device is fixedly installed at the other end of the flushing pipe.

[0012] In some embodiments, a fine filter tank is fixedly connected to the side of the filter tank by bolts, a fine filter screen is snapped into the inner wall of the fine filter tank, and the other end of the fine filter screen is snapped into the side wall surface of the filter tank.

[0013] In some embodiments, a first water pump is fixedly connected to one end of the fine filter tank via a connecting pipe, and the other end of the first water pump is fixedly connected to the feed inlet of the hydrocyclone via a connecting pipe and a flange.

[0014] In some embodiments, a sludge tank is fixedly installed at the bottom of the underflow port of the hydrocyclone, and its overflow port is fixedly connected to the inlet of the contact tank through a connecting pipe and a flange.

[0015] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: 1. This utility model discloses a wastewater treatment and reuse device for ecological agricultural construction. It utilizes a dissolved air tank to pressurize water, dissolving a large amount of air into it. A dissolved air release device then instantly depressurizes the water, generating numerous microbubbles that flow into a contact tank. These bubbles adhere to the surface of suspended solids, forming a "bubble-particle" composite. Since the overall density of this composite is less than water, it floats to the surface, forming a scum layer. This device efficiently removes difficult-to-settle light suspended solids (such as grease and fine particles) using physical methods. Furthermore, automated control reduces manual operation, improving treatment efficiency and stability.

[0016] 2. This utility model discloses a wastewater treatment and reuse device for ecological agricultural construction. By using the purified water treated by the device as recycled water flowing into a dissolved air tank, the device achieves the recycling of water resources, significantly reduces the consumption of fresh water, and reflects the energy saving and sustainability of the system.

[0017] 3. This utility model provides a wastewater treatment and reuse device for ecological agricultural construction. It can effectively remove solid impurities of different particle sizes through multi-stage filtration. The self-cleaning mechanism and the online replacement design of the fine filter screen greatly reduce the maintenance workload, ensure the continuous and stable operation of the system, and effectively protect downstream equipment such as water pumps. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a wastewater treatment and reuse device for ecological agricultural construction according to an embodiment of this utility model; Figure 2 This is a side view of a wastewater treatment and reuse device for ecological agricultural construction according to an embodiment of this utility model; Figure 3 This is a top view of a wastewater treatment and reuse device for ecological agricultural construction according to an embodiment of this utility model; Figure 4 This is a cross-sectional view of the filter pool of a wastewater treatment and reuse device for ecological agricultural construction in an embodiment of this utility model. Figure 5 This is a cross-sectional view of the filter pool of a wastewater treatment and reuse device for ecological agricultural construction in an embodiment of this utility model. Figure 6 This is a cross-sectional view of the separation tank of a wastewater treatment and reuse device for ecological agricultural construction in an embodiment of this utility model.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1 filtration tank, 2 hydrocyclone, 3 dissolved air tank, 4 contact tank, 5 waste tank, 6 sludge tank, 7 separation tank, 8 wastewater inlet, 9 scum discharge pipe, 10 effluent pipe, 11 inlet, 12 first filter screen, 13 second filter screen, 14 fine filter screen, 15 first water pump, 16 electric shut-off valve, 17 second water pump, 18 dissolved air release device, 19 flushing device, 20 rotating shaft, 21 scraper, 22 baffle, 23 first three-way valve, 24 second three-way valve, 25 fine filter, 26 flushing pipe, 27 rotary motor, 28 scum tank, 29 connecting pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] Please refer to Figure 1-6 An ecological agricultural wastewater treatment and reuse device includes a filter tank 1, a hydrocyclone 2, a dissolved air tank 3, and a contact tank 4, as well as a connecting pipe 29 connecting the above-mentioned parts; a dissolved air release device 18 is fixedly installed on the surface of the side outlet pipe of the dissolved air tank 3, and the other end of the dissolved air release device 18 is fixedly connected to the contact tank 4; an electric shut-off valve 16 is fixedly installed on the surface of the outlet pipe at the bottom of the contact tank 4, and the other end of the electric shut-off valve 16 is fixedly connected to a separation tank 7 through the connecting pipe 29 and a flange; a partition 22 is fixedly installed on the inner wall of the separation tank 7, which divides the interior of the separation tank 7 into a scum tank 28, and a scum discharge pipe 9 is fixedly installed on the side of the scum tank 28; a rotary motor 27 is fixedly installed in the middle of the bottom of the separation tank 7, and a rotating shaft 20 is rotatably connected to the end of the output shaft of the rotary motor 27, and a scraper 21 for scraping off scum is fixedly installed on the side of the rotating shaft 20 by bolts.

[0023] The clean water (or partially treated recycled water) in the dissolved air tank 3 is pressurized, causing a large amount of air to dissolve in the water. The dissolved air release device 18 then instantly depressurizes the water, generating a large number of fine bubbles that flow into the contact tank 4 and mix thoroughly with the treated water. The bubbles adhere to the surface of suspended solids, forming a "bubble-particle" composite, whose overall density is less than that of water. These composites quickly float to the surface, forming a scum layer. The electric shut-off valve 16 is equipped with a timer. After the set time, the valve opens, allowing wastewater to flow into the separation tank 7. The rotary motor 27 then starts, driving the scraper 21 to scrape away the scum from the surface of the treated water, which then enters the scum tank 28 and is discharged through the scum discharge pipe 9. The treated water flows out through the outlet of the separation tank 7. This process efficiently removes difficult-to-settle light suspended solids (such as grease and fine particles) using physical methods, and reduces manual operation through automated control (timed operation and scum scraping), improving treatment efficiency and stability.

[0024] In this embodiment, the outlet pipe on the side of the separation tank 7 is fixedly connected to a first three-way valve 23 via a flange. The first port of the first three-way valve 23 is fixedly connected to an outlet pipe 10 via a flange, and the second port is fixedly connected to a second three-way valve 24 via a connecting pipe 29 and a flange. A second water pump 17 is fixedly installed on the top of the second three-way valve 24. The first port of the second three-way valve 24 is fixedly connected to an inlet 11 via a flange, and the second port is fixedly connected to the inlet pipe of the dissolved air tank 3 via a flange.

[0025] The dissolved air tank 3 initially uses clean water flowing in from the inlet 11. Subsequently, after the purified water from the separation tank 7 flows out through the first three-way valve 23 and the outlet pipe 10, the user can control the second three-way valve 24 to block the inlet 11 pipe. The second water pump 17 then draws a portion of the treated water through the first three-way valve 23, using it as recycled water to continue producing dissolved air water in the dissolved air tank 3, which then flows into the contact tank 4. This process achieves water resource recycling, significantly reduces the consumption of fresh water, and demonstrates the system's energy efficiency and sustainability.

[0026] In this embodiment, a wastewater inlet 8 is bolted to the top of the filter pool 1, and a garbage pool 5 is bolted to its bottom. Inside the filter pool 1, a first filter grid 12 and a second filter grid 13 inclined towards the garbage pool 5 are bolted together, with the first filter grid 12 located above the second filter grid 13. A hole is formed on the side of the filter pool 1 at the top of the second filter grid 13, and a flushing pipe 26 is bolted to the inner wall of the hole. A flushing device 19 is fixed to the other end of the flushing pipe 26. A fine filter pool 25 is bolted to the side of the filter pool 1, and multiple fine filter screens 14 are snapped onto the inner wall of the fine filter pool 25. The other end of each fine filter screen 14 is snapped onto the side wall surface of the filter pool 1.

[0027] Untreated wastewater flows into the filter tank 1 through the wastewater inlet 8. First, larger impurities are filtered by the first filter screen 12 and the second filter screen 13. Larger impurities on the surface of the first filter screen 12 are flushed into the wastewater pit 5 by the wastewater flowing in through the wastewater inlet 8. Impurities on the surface of the second filter screen 13 are flushed by high-pressure water through the flushing pipe 26 by the timed activation of the flushing device 19, also flushing them into the wastewater pit 5. Finally, the filtered treated water flows down the bottom of the filter tank 1 into the fine filter tank 25, where it is filtered by fine filter screens 14 to remove fine particles, hair, feathers, etc., protecting the subsequent water pump. The multiple fine filter screens 14 are fixed to the sides of the fine filter tank 25 and the filter tank 1 by snap-fit ​​connections. When the user needs to replace the fine filter screens 14, simply remove the innermost snap-fit ​​to remove the innermost fine filter screen 14, while the outer fine filter screens 14 continue to filter. This allows the device to replace the fine filter screens 14 without stopping the machine. Multi-stage filtration (coarse, medium, and fine) effectively removes solid impurities of different particle sizes. The self-cleaning mechanism (hydraulic flushing) and the online replacement design of the fine filter 14 greatly reduce maintenance workload, ensure continuous and stable operation of the system, and effectively protect downstream equipment such as water pumps.

[0028] In this embodiment, a first water pump 15 is fixedly connected to one end of the fine filter tank 25 via a connecting pipe 29, and the other end of the first water pump 15 is fixedly connected to the feed inlet of the hydrocyclone 2 via a connecting pipe 29 and a flange; a sludge tank 6 is fixedly installed at the bottom of the underflow port of the hydrocyclone 2, and its overflow port is fixedly connected to the inlet of the contact tank 4 via a connecting pipe 29 and a flange.

[0029] The treated water, after passing through the fine filter 14, is pressurized by the first water pump 15 and fed into the inlet of the hydrocyclone 2. Under the action of centrifugal force, the thick sludge flows into the sludge tank 6 through the bottom outlet of the hydrocyclone 2, while the clean water flows into the contact tank 4 through the overflow outlet of the hydrocyclone 2 for further filtration. This method efficiently separates high-density solid particles (such as sand) in wastewater using the principle of centrifugal force. It requires no moving parts, has a simple and reliable structure, and reduces the load on subsequent treatment units.

[0030] In this example, an ecological agricultural wastewater treatment and reuse device is described. Agricultural wastewater flows into a filter tank 1 through a wastewater inlet 8 and undergoes triple filtration through a first filter screen 12, a second filter screen 13, and a fine filter screen 14. Larger impurities are washed onto the surface of the first filter screen 12 by the wastewater, and the surface of the second filter screen 13 is washed by a washing device 19 before entering the waste pit 5. The fine filter screen 14 filters out fine particles, hair, feathers, etc., to protect the subsequent water pump. Subsequently, the wastewater is pressurized by a first water pump 15 and flushed into a hydrocyclone 2. Under the action of centrifugal force, thick sludge is washed away by the water. The bottom outlet of the hydrocyclone 2 flows into the sludge tank 6, while the clean water flows into the contact tank 4 through the overflow outlet of the hydrocyclone 2. The dissolved air tank 3 pressurizes part of the treated water discharged from the separation tank 7 through the second water pump 17, causing a large amount of air to dissolve in the water. Then, the dissolved air release device 18 instantly depressurizes the water, generating a large number of microbubbles that flow into the contact tank 4. Subsequently, the electric shut-off valve 16 is activated, allowing these wastewaters to flow into the separation tank 7. The scraper 21 then scrapes the scum on the surface of the treated water into the scum tank 28, and discharges it through the scum discharge pipe 9. The treated water then flows out through the outlet of the separation tank 7.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A wastewater treatment and reuse device for ecological agricultural construction, characterized in that: The system includes a filter tank (1), a hydrocyclone (2), a dissolved air tank (3), and a contact tank (4), as well as connecting pipes (29) for each of the above components; a dissolved air release device (18) is fixedly installed on the surface of the side outlet pipe of the dissolved air tank (3), and the other end of the dissolved air release device (18) is fixedly connected to the contact tank (4); an electric shut-off valve (16) is fixedly installed on the surface of the outlet pipe at the bottom of the contact tank (4), and the other end of the electric shut-off valve (16) is fixedly connected to a flange via the connecting pipe (29). Separation tank (7); a partition (22) is fixedly installed on the inner wall of the separation tank (7), which separates the interior of the separation tank (7) into a scum tank (28), and a scum discharge pipe (9) is fixedly installed on the side of the scum tank (28); a rotary motor (27) is fixedly installed in the middle of the bottom of the separation tank (7), and a rotating shaft (20) is rotatably connected to the end of the output shaft of the rotary motor (27), and a scraper (21) for scraping scum is fixedly installed on the side of the rotating shaft (20) by bolts.

2. The wastewater treatment and reuse device for ecological agricultural construction according to claim 1, characterized in that: The outlet pipe on the side of the separation tank (7) is fixedly connected to a first three-way valve (23) via a flange. The first port of the first three-way valve (23) is fixedly connected to an outlet pipe (10) via a flange, and the second port is fixedly connected to a second three-way valve (24) via a connecting pipe (29) and a flange. A second water pump (17) is fixedly installed on the top of the second three-way valve (24). The first port of the second three-way valve (24) is fixedly connected to an inlet (11) via a flange, and the second port is fixedly connected to the inlet pipe of the dissolved air tank (3) via a flange.

3. The wastewater treatment and reuse device for ecological agricultural construction according to claim 1, characterized in that: The top of the filter tank (1) is fixed with a wastewater inlet (8) by bolts, and the bottom of the filter tank (1) is fixed with a garbage tank (5) by bolts.

4. The wastewater treatment and reuse device for ecological agricultural construction according to claim 1, characterized in that: The filter pool (1) is bolted to the interior of a first filter grid (12) and a second filter grid (13) that are inclined toward the garbage pool (5), wherein the first filter grid (12) is located above the second filter grid (13).

5. The wastewater treatment and reuse device for ecological agricultural construction according to claim 4, characterized in that: The side of the filter pool (1) is provided with holes at the top of the second filter grid (13). A flushing pipe (26) is fixed to the inner wall of the holes by bolts, and a flushing device (19) is fixedly installed at the other end of the flushing pipe (26).

6. The wastewater treatment and reuse device for ecological agricultural construction according to claim 1, characterized in that: The side of the filter pool (1) is fixedly connected to a fine filter pool (25) by bolts. Multiple fine filter screens (14) are snapped into the inner wall of the fine filter pool (25). The other end of the fine filter screen (14) is snapped into the side wall surface of the filter pool (1).

7. The wastewater treatment and reuse device for ecological agricultural construction according to claim 6, characterized in that: The end of the fine filter tank (25) is fixedly connected to the first water pump (15) via a connecting pipe (29), and the other end of the first water pump (15) is fixedly connected to the feed inlet of the hydrocyclone (2) via a connecting pipe (29) and a flange.

8. The wastewater treatment and reuse device for ecological agricultural construction according to claim 1, characterized in that: The bottom of the hydrocyclone (2) is fixedly provided with a sludge tank (6), and its overflow port is fixedly connected to the inlet of the contact tank (4) through a connecting pipe (29) and a flange.

Images