Garden rainwater collection and purification treatment device based on multi-stage filtration

Abstract

The application relates to the technical field of garden engineering, and discloses a garden rainwater collection and purification treatment device based on multistage filtration, which comprises a support, a purification tank is fixedly connected to the top of the support, a biological filtration assembly for biodegradation and purification of rainwater is further arranged in the purification tank, and a sedimentation tank for rainwater collection is further arranged at the top of the purification tank. Compressed air is released into the cylinder through the aeration disc, the closed structure of the cylinder restricts the bubbles from diffusing in disorder, the screw thread flow guide groove in the cylinder guides the bubbles to spiral upward, the rising bubble flow impacts the broken paddle at the bottom of the shaft support to rotate, the large bubbles are broken into micro-bubbles through shearing to increase the specific surface area, the bubbles are efficiently utilized, the problem that the bubbles and the water body are not fully contacted and the dissolved oxygen is insufficient is solved, and the water quality requirement of the garden water is met.

Description

Technical Field

[0001] This invention relates to the field of landscape engineering technology, specifically to a landscape rainwater collection and purification device based on multi-stage filtration. Background Technology

[0002] With the large-scale development of garden projects, the demand for water for green space irrigation and landscape water replenishment is increasing. The traditional reliance on municipal water supply not only exacerbates water shortages but also increases garden maintenance costs. As a renewable resource, rainwater recycling has become an important way to alleviate the pressure on garden water use. However, natural rainwater carries impurities such as surface silt, fallen leaves, and organic pollutants during its collection process. Direct use of rainwater can have an adverse effect on the growth of garden plants. Therefore, it is necessary to improve the quality of rainwater through purification treatment.

[0003] Existing garden rainwater purification devices employ biological purification processes, but the aeration structure is mostly a simple bubble release structure. The bubbles do not have sufficient contact with the water and the residence time is short, resulting in insufficient dissolved oxygen in the water. This limits the degradation efficiency of microorganisms on organic pollutants and makes it difficult to meet the water quality requirements for garden water use. Therefore, there is an urgent need to develop a garden rainwater collection and purification treatment device based on multi-stage filtration to solve these practical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a garden rainwater collection and purification device based on multi-stage filtration. This addresses the problem that in the biological purification process of garden rainwater purification devices, the aeration structure is often a simple bubble release structure, resulting in insufficient contact between the bubbles and the water and a short residence time. This leads to insufficient dissolved oxygen in the water, limiting the degradation efficiency of microorganisms on organic pollutants and making it difficult to meet the water quality requirements for garden water use.

[0005] To achieve the above objectives, the present invention provides a garden rainwater collection and purification device based on multi-stage filtration, comprising a support frame, a purification box fixedly connected to the top of the support frame, a biological filtration component for biodegrading and purifying rainwater inside the purification box, and a sedimentation box for collecting rainwater on the top of the purification box.

[0006] It also includes a bubble splitting aeration mechanism, which includes an air supply component located on one side of the purification box. The air supply end of the air supply component is provided with multiple sets of aeration discs located at the bottom of the purification box. A cylinder is fixed to the top of the aeration discs. A threaded guide groove for guiding the bubbles is opened on the inner side of the cylinder. A shaft frame is rotatably installed at the top of the cylinder. A breaking blade for splitting and breaking the bubbles is rotatably installed at the bottom of the shaft frame through a bearing. The breaking blade is located at the top of the cylinder.

[0007] Preferably, the air supply assembly includes an air pump located on one side of the purification box, with a transfer box fixedly connected to one end of the air pump's outlet pipe, and the bottom end of the transfer box being connected to the aeration disc through a three-way pipe.

[0008] Preferably, the number of aeration discs is at least three sets, and the aeration discs are microporous aeration discs.

[0009] Preferably, it also includes a pneumatic linkage brush-type maintenance mechanism, which includes a bearing seat disposed inside the transfer box. A fan blade is rotatably mounted on the top of the bearing seat, and a shaft is mounted on the bottom of the fan blade through a transmission assembly. The shaft is located at the top inside the purification box and is rotatably connected to the top inside the purification box. A brush plate is fixedly connected to the bottom of the shaft.

[0010] Preferably, the transmission assembly includes a transmission wheel disposed at the bottom end of the fan blade, a transmission belt is sleeved on the outer side of the transmission wheel, and the transmission belt is circumferentially connected to the outer side of the bottom end of the shaft.

[0011] Preferably, a protective box is also provided on one side of the purification box, and the protective box is placed on the outside of the air pump.

[0012] Preferably, the biofiltration assembly includes a shell that is slidably installed on the inner wall of the purification box. The shell has nanoporous plates embedded in its interior and bottom. The top of the shell is filled with hydroxylated ceramic particles for biodegrading the water source, and the bottom of the shell is fixed with an activated carbon composite plate for adsorbing and purifying the water source.

[0013] Preferably, a metal grating plate for separating external impurities from rainwater is fixed to the top of the sedimentation tank, multiple sets of mesh plates are fixed to the bottom of the metal grating plate, and a conveying pipe that runs through and connects to one side of the purification tank is fixed to one side of the sedimentation tank.

[0014] Preferably, the bottom of the sedimentation tank is further provided with a sedimentation trough, and the sedimentation trough has a V-shaped cross-section.

[0015] Preferably, an automatic exhaust valve is also provided on the top of one side of the purification box.

[0016] This invention provides a garden rainwater collection and purification device based on multi-stage filtration. Compared with the prior art, it has the following advantages:

[0017] 1. Compressed air is released through the aeration disc and enters the cylinder. Its closed structure constrains the bubbles to prevent disorderly diffusion. The threaded guide groove inside the cylinder guides the bubbles to rise spirally, prolonging the contact time and reducing loss due to adhering to the wall. The rising bubble flow impacts the rotating crushing blades at the bottom of the shaft frame, breaking large bubbles into microbubbles through shearing action to increase the specific surface area. The aeration disc, cylinder, threaded guide groove and crushing blades work together to improve dissolved oxygen efficiency, realize efficient utilization of bubbles, solve the problem of insufficient contact between bubbles and water and insufficient dissolved oxygen, ensure the efficiency of microbial degradation, and meet the water quality requirements for garden water use.

[0018] 2. When the high-pressure gas delivered by the air pump flows through the transfer box, it drives the fan blades on the drive shaft to rotate, converting pneumatic energy into mechanical power. This power is then transmitted through the transmission belt to rotate the shaft inside the purification box, causing the brush plate to make circular motion. This creates flexible contact with the surface of the nanoporous plate at the top of the shell, removing excess biofilm and fine impurities. This solves the problem of increased water flow resistance and decreased filtration efficiency caused by the accumulation of deposits on the nanoporous plate after long-term operation of the biological filtration component, ensuring the water flow effect in the biological filtration area. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 This is a schematic diagram of the installation position of the metal grating plate according to the present invention;

[0022] Figure 4 This is a schematic diagram of the installation position of the purification box of the present invention;

[0023] Figure 5 This is a schematic diagram of the interior of the purification box of the present invention;

[0024] Figure 6 This is a partial schematic diagram of the bubble splitting aeration mechanism of the present invention;

[0025] Figure 7 This is a schematic diagram showing the installation position of the pneumatic linkage brush-type maintenance mechanism of the present invention;

[0026] Figure 8 This is a partially enlarged schematic diagram of the pneumatic linkage brush-type maintenance mechanism of the present invention;

[0027] Figure 9 This is a partial cross-sectional view of the cylinder body 404 of the present invention;

[0028] Figure 10 This is a partially enlarged cross-sectional view of the cylinder body 404 of the present invention;

[0029] Figure 11This is a partial cross-sectional schematic diagram of the housing of the present invention.

[0030] In the diagram: 1. Support frame; 2. Sedimentation tank; 201. Metal grating; 202. Mesh plate; 203. Sedimentation tank; 204. Conveying pipe; 3. Purification box; 301. Shell; 302. Nanoporous plate; 303. Hydroxylated ceramic particles; 304. Activated carbon composite plate; 4. Bubble splitting aeration mechanism; 401. Air pump; 402. Transfer box; 403. Aeration disc; 404. Cylinder; 405. Threaded guide groove; 406. Shaft bracket; 407. Crushing blade; 5. Pneumatic linkage brush-type maintenance mechanism; 501. Shaft seat; 502. Fan blade; 503. Drive wheel; 504. Drive belt; 505. Shaft; 506. Brush plate; 6. Protective box; 7. Automatic exhaust valve. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] First implementation method:

[0033] refer to Figure 1-11 A garden rainwater collection and purification device based on multi-stage filtration includes a support 1, a purification box 3 fixedly connected to the top of the support 1, a biological filtration component for biodegradation and purification of rainwater is provided inside the purification box 3, and a sedimentation box 2 for collecting rainwater is provided on the top of the purification box 3.

[0034] It also includes a bubble splitting aeration mechanism 4, which includes an air supply component disposed on one side of the purification box 3. The air supply end of the air supply component is provided with multiple sets of aeration discs 403 located at the bottom of the purification box 3. A cylinder 404 is fixedly connected to the top of the aeration discs 403. A threaded guide groove 405 for guiding the bubbles is opened on the inner side of the cylinder 404. A shaft frame 406 is rotatably installed at the top of the cylinder 404. A crushing blade 407 for splitting and breaking the bubbles is rotatably installed at the bottom of the shaft frame 406 through a bearing. The crushing blade 407 is located at the top inside the cylinder 404.

[0035] The air supply assembly includes an air pump 401 located on one side of the purification box 3. One end of the air outlet pipe of the air pump 401 is fixedly connected to a transfer box 402. The bottom end of the transfer box 402 is connected to the aeration disc 403 through a three-way pipe. There are at least three sets of aeration discs 403, and the aeration discs 403 are microporous aeration discs 403. A protective box 6 is also provided on one side of the purification box 3, and the protective box 6 covers the outside of the air pump 401.

[0036] The biological filtration assembly includes a housing 301 that is slidably installed on the inner wall of the purification box 3. A nanoporous plate 302 is embedded in the inside and bottom of the housing 301. The top of the inside of the housing 301 is filled with hydroxylated ceramic particles 303 for biodegrading the water source. An activated carbon composite plate 304 for adsorbing and purifying the water source is fixed to the bottom of the inside of the housing 301. An automatic exhaust valve 7 is also provided on the top of one side of the purification box 3.

[0037] The sedimentation tank 2 collects rainwater and then transports the collected water to the purification tank 3. First, the water flows through the nanoporous plate 302 embedded at the bottom of the shell 301. Its uniformly distributed microporous structure can disperse the water flow into multiple fine water streams, guiding the water to permeate evenly upwards into the entire biological filtration area.

[0038] When water flows through the hydroxylated ceramic particles 303 layer filled at the top of the shell 301, the active groups formed by the hydroxylation treatment on the surface of the ceramic particles can firmly attach a large number of microorganisms, including heterotrophic bacteria and nitrifying bacteria, forming a stable biofilm. These microorganisms decompose organic pollutants such as COD (chemical oxygen demand) and BOD (biochemical oxygen demand) in rainwater into harmless carbon dioxide and water through aerobic metabolism, while converting ammonia nitrogen into nitrate.

[0039] To ensure the oxygen required for microbial metabolism, the air pump 401 continuously draws in outside air and delivers it to multiple aeration discs 403 at the bottom of the purification tank 3 via the transfer box 402. As the bubbles released by the aeration discs 403 rise, they replenish dissolved oxygen in the water and provide sufficient oxygen for the microorganisms on the hydroxylated ceramic particles 303. The gas is then discharged through the automatic exhaust valve 7.

[0040] When water is discharged from the source, the water flows downwards and seeps into the activated carbon composite plate 304 at the bottom of the shell 301. The porous structure of the activated carbon can adsorb residual trace organic matter, pigments and some heavy metal ions in the water, further improving the water quality. Through the uniform distribution of water flow in the nanoporous plate 302, the biodegradation of hydroxylated ceramic particles 303 and the oxygen supply of the aeration system, the COD and ammonia nitrogen removal rate of rainwater is significantly improved, making it more suitable for greening water scenarios such as garden irrigation and seedling cultivation.

[0041] When compressed air is released through the aeration disc 403, it first enters the cylinder 404 fixed to the top of the aeration disc 403. The closed structure of the cylinder 404 can confine the initially released dispersed bubbles in a limited space, preventing the bubbles from spreading outwards without being fully utilized.

[0042] The spirally rising threaded guide groove 405 inside the cylinder 404 guides the rising bubble group, forcing the bubbles to move in a spiral motion along the channel, increasing the length of the rising bubble path and prolonging the contact time between the bubbles and the water. At the same time, the centrifugal force generated by the spiral motion causes the bubbles to gather towards the center of the cylinder 404, reducing the phenomenon of bubbles sticking to the wall and being lost.

[0043] As the bubbles continue to rise to the top of the cylinder 404, the high-speed spiral bubble flow will impact the breaking blades 407 at the bottom of the shaft frame 406, driving the blades to rotate. The rotating breaking blades 407 break large bubbles into microbubbles through the shearing action of the blades, significantly increasing the specific surface area of ​​the bubbles.

[0044] By combining the uniform air distribution of the aeration disc 403, the spatial constraint of the cylinder 404, the path optimization of the threaded guide groove 405, and the mechanical crushing of the crushing blade 407, the dissolved oxygen efficiency of the water body is improved, realizing the functions of efficient utilization of bubbles and improvement of dissolved oxygen rate. This solves the problem of insufficient contact between bubbles and water body and short residence time, which leads to insufficient dissolved oxygen in the water body, and ensures the degradation efficiency of microorganisms on organic pollutants, thereby meeting the water quality requirements for garden water.

[0045] After undergoing the above-mentioned multi-stage purification process, the rainwater collects at the bottom of the purification tank 3. At this point, the drain pipe at the bottom of one side of the purification tank 3 is connected to the main irrigation network of the garden or a mobile irrigation device. The purified rainwater can be transported to garden green spaces, flower nurseries, landscape water bodies and other areas by gravity flow or low-pressure pumping for plant irrigation, landscape water replenishment and other operations. This process realizes the recycling and reuse of rainwater resources, reduces the garden's dependence on municipal tap water, and conforms to the environmental protection concept of water conservation and recycling.

[0046] Among them, the protective box 6 isolates external dust, rainwater and plant debris in the garden environment through a closed enclosure, reducing the risk of impurities being sucked in when the air pump 401 is running, and at the same time reducing the impact of equipment operating noise on the surrounding environment.

[0047] Second implementation method:

[0048] Garden rainwater carries a large amount of impurities due to surface runoff. Direct entry of rainwater into the biological purification system can easily lead to problems such as clogging of the packing material and inhibition of microbial activity.

[0049] refer to Figure 1-3 In the second embodiment of the present invention, a metal grid plate 201 for separating external impurities from rainwater is fixedly connected to the top of the sedimentation tank 2, and multiple sets of mesh plates 202 are fixedly connected to the bottom of the metal grid plate 201. A conveying pipe 204 that is connected to one side of the purification tank 3 is fixedly connected to one side of the sedimentation tank 2. A sedimentation tank 203 is also provided at the bottom inside the sedimentation tank 2, and the sedimentation tank 203 has a V-shaped cross section.

[0050] Sedimentation tank 2, as the first treatment unit of the rainwater inlet device, collects rainwater from the outside. Its top metal grid plate 201 adopts a mesh structure, which can directly intercept large impurities such as dead branches, fallen leaves, and plastic fragments carried in the rainwater, preventing such impurities from entering the subsequent system and causing blockage. The mesh plate 202 directly below the metal grid plate 201 further screens the rainwater, filtering out suspended impurities such as mud and sand clumps and small plant residues, realizing the graded separation of rainwater and impurities.

[0051] After the rainwater settles in the sedimentation tank 2, the denser silt particles, mineral debris and other impurities in the water will slide down the inclined inner wall of the bottom V-shaped sedimentation tank 203 to the bottom of the tank for temporary storage, thereby reducing the turbidity of the rainwater.

[0052] After sedimentation and pretreatment, the rainwater is transported from the sedimentation tank 2 to the purification tank 3 through the conveying pipe 204. Through the coarse filtration of the metal grid plate 201, the fine filtration of the mesh plate 202, and the sedimentation of the sedimentation tank 203, the rainwater achieves a highly efficient impurity separation function. This solves the practical problem that rainwater from gardens carries a large amount of impurities due to surface runoff, which can easily lead to clogging of the packing material and inhibition of microbial activity when it directly enters the biological purification system.

[0053] The third implementation method:

[0054] After long-term operation, excessive biofilm and impurities tend to adhere to the surface of biological filter carriers, leading to increased water flow permeation resistance and decreased filtration efficiency. This requires regular manual disassembly and cleaning, which is cumbersome and affects the continuous operation efficiency of the device.

[0055] refer to Figure 5-8 In the third embodiment of the present invention, a pneumatic linkage brush type maintenance mechanism 5 is also included. The pneumatic linkage brush type maintenance mechanism 5 includes a bearing seat 501 disposed inside the transfer box 402. A fan blade 502 is rotatably mounted on the top of the bearing seat 501. A shaft 505 is mounted on the bottom end of the fan blade 502 through a transmission assembly. The shaft 505 is located at the top inside the purification box 3 and is rotatably connected to the top inside the purification box 3. A brush plate 506 is fixedly connected to the bottom end of the shaft 505.

[0056] The transmission assembly includes a transmission wheel 503 disposed at the bottom end of the fan blade 502, a transmission belt 504 sleeved on the outside of the transmission wheel 503, and the transmission belt 504 is connected to the outer side of the bottom end of the shaft 505.

[0057] When the high-pressure gas delivered by the air pump 401 flows through the transfer box 402, part of the airflow will drive the fan blade 502 on the bearing 501 inside the box to rotate at high speed, converting pneumatic energy into mechanical rotational power. The transmission wheel 503, which is coaxially fixed to the bottom end of the fan blade 502, rotates synchronously with the fan blade 502, and transmits the power to the shaft 505 inside the purification box 3 through the transmission belt 504 sleeved on the outside.

[0058] Driven by the transmission belt 504, the shaft 505 rotates, and the brush plate 506 fixed at its bottom end moves in a circular motion, forming a continuous flexible contact with the surface of the nanoporous plate 302 on the top of the housing 301. This removes excess biofilm and trapped fine impurities from the surface of the nanoporous plate 302, preventing these deposits from clogging the nanoporous plate 302. Through the energy conversion driven by pneumatics, the power transmission of the transmission components, and the coordinated use of the brush plate 506, the dynamic maintenance function of the carrier surface is realized. This solves the problem of increased water flow permeability resistance and decreased filtration efficiency caused by the accumulation of deposits on the surface of the nanoporous plate 302 after long-term operation of the biological filtration component, ensuring the flow effect of water in the area of ​​the biological filtration component.

[0059] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A garden rainwater collection and purification device based on multi-stage filtration, comprising a support frame (1), characterized in that: The top of the bracket (1) is fixed with a purification box (3), and the purification box (3) is also equipped with a biological filter component for biodegradation and purification of rainwater, and the top of the purification box (3) is also equipped with a sedimentation box (2) for collecting rainwater. It also includes a bubble splitting aeration mechanism (4), which includes an air supply component disposed on one side of the purification box (3). The air supply end of the air supply component is provided with multiple sets of aeration discs (403) located at the bottom of the purification box (3). A cylinder (404) is fixedly connected to the top of the aeration disc (403). A threaded guide groove (405) for guiding the bubbles is opened on the inner side of the cylinder (404). A shaft frame (406) is rotatably installed at the top of the cylinder (404). A crushing blade (407) for splitting and breaking the bubbles is rotatably installed at the bottom of the shaft frame (406) through a bearing. The crushing blade (407) is located at the top inside the cylinder (404).

2. The garden rainwater collection and purification device based on multi-stage filtration according to claim 1, characterized in that: The air supply assembly includes an air pump (401) located on one side of the purification box (3). One end of the air outlet pipe of the air pump (401) is fixedly connected to a transfer box (402). The bottom end of the transfer box (402) is connected to the aeration disc (403) through a three-way pipe.

3. A garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: The number of aeration discs (403) is at least three sets, and the aeration discs (403) are microporous aeration discs.

4. A garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: It also includes a pneumatic linkage brush type maintenance mechanism (5), which includes a bearing seat (501) located inside the transfer box (402). A fan blade (502) is rotatably mounted on the top of the bearing seat (501), and a shaft (505) is mounted on the bottom of the fan blade (502) through a transmission assembly. The shaft (505) is located at the top inside the purification box (3) and is rotatably connected to the top inside the purification box (3). A brush plate (506) is fixedly connected to the bottom of the shaft (505).

5. A garden rainwater collection and purification device based on multi-stage filtration according to claim 4, characterized in that: The transmission assembly includes a transmission wheel (503) disposed at the bottom end of the fan blade (502), a transmission belt (504) is sleeved on the outside of the transmission wheel (503), and the transmission belt (504) is connected to the outside of the bottom end of the shaft (505).

6. A garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: A protective box (6) is also provided on one side of the purification box (3), and the protective box (6) covers the outside of the air pump (401).

7. A garden rainwater collection and purification device based on multi-stage filtration according to claim 1, characterized in that: The biofiltration assembly includes a shell (301) that is slidably installed on the inner wall of the purification box (3). The shell (301) has a nanoporous plate (302) embedded in its interior and bottom. The top of the shell (301) is filled with hydroxylated ceramic particles (303) for biodegrading water sources. The bottom of the shell (301) is fixed with an activated carbon composite plate (304) for adsorbing and purifying water sources.

8. A garden rainwater collection and purification device based on multi-stage filtration according to claim 1, characterized in that: The top of the sedimentation tank (2) is fixed with a metal grid plate (201) for separating external impurities from rainwater. The bottom of the metal grid plate (201) is fixed with multiple sets of mesh plates (202). A conveying pipe (204) is fixed on one side of the sedimentation tank (2) and is connected to the side of the purification tank (3).

9. A garden rainwater collection and purification device based on multi-stage filtration according to claim 8, characterized in that: The bottom of the sedimentation tank (2) is also provided with a sedimentation tank (203), and the sedimentation tank (203) has a V-shaped cross section.

10. A garden rainwater collection and purification device based on multi-stage filtration according to claim 1, characterized in that: An automatic exhaust valve (7) is also provided on the top of one side of the purification box (3).

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