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

Abstract

The invention relates to the technical field of garden engineering, and discloses a garden rainwater collection and purification treatment device based on multi-stage filtration, the garden rainwater collection and purification treatment device based on multi-stage filtration comprises a support, and the top of the support is fixedly connected with a purification box; a biological filtering assembly used for biodegrading and purifying rainwater is further arranged in the purifying box, and a settling box used for collecting the rainwater is further arranged on the top of the purifying box. Compressed air is released by the aeration disc and then enters the cylinder body, a closed structure restrains bubbles to avoid disordered diffusion, a threaded flow guide groove in the cylinder body guides the bubbles to spirally rise, rising bubble flow impacts crushing blades at the bottom of a shaft bracket to rotate, large bubbles are crushed into micro bubbles through the shearing action to increase the specific surface area, and efficient utilization of the bubbles is achieved. The problems of insufficient contact between bubbles and water and insufficient dissolved oxygen are solved, and the water quality requirement of garden water is met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of garden engineering, in particular to a garden rainwater collection and purification treatment device based on multistage filtration. BACKGROUND

[0002] With the large-scale development of garden engineering, the water demand for green land irrigation and landscape water replenishment is increasing, and the traditional mode of relying on municipal water supply not only aggravates the water resource shortage, but also increases the garden maintenance cost. Rainwater is a renewable resource, and its recycling becomes an important way to alleviate the pressure of garden water use. However, natural rainwater carries impurities such as surface silt, dry branches and leaves, and organic pollutants during the collection process, and direct use may adversely affect the growth of garden plants, so it is necessary to improve the rainwater quality through purification treatment.

[0003] In the biological purification process of the existing garden rainwater purification device, the aeration structure is mainly a simple bubble release structure. The bubble and the water body are not fully contacted, and the residence time is short, which leads to insufficient oxygen dissolution in the water body, limits the degradation efficiency of microorganisms on organic pollutants, and is difficult to meet the water quality requirements of garden water use. Therefore, it is urgent to develop a garden rainwater collection and purification treatment device based on multistage filtration to solve these practical problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a garden rainwater collection and purification treatment device based on multistage filtration, which solves the problem that in the biological purification process of the garden rainwater purification device, the aeration structure is mainly a simple bubble release structure. The bubble and the water body are not fully contacted, and the residence time is short, which leads to insufficient oxygen dissolution in the water body, limits the degradation efficiency of microorganisms on organic pollutants, and is difficult to meet the water quality requirements of garden water use.

[0005] To achieve the above purpose, the application provides 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 collecting rainwater is further arranged on the top of the purification tank.

[0006] The bubble splitting aeration mechanism comprises a gas supply assembly arranged on one side of the purification tank, a plurality of aeration discs are arranged at the gas supply end of the gas supply assembly and located at the bottom of the interior of the purification tank, a cylinder is fixedly connected to the top of the aeration disc, a threaded flow guide groove for guiding the bubbles is formed in the inner side of the cylinder, an axle bracket is rotatably installed at the top end of the cylinder, a crushing paddle for splitting and crushing the bubbles is rotatably installed at the bottom of the axle bracket, and the crushing paddle is located at the top of the interior of the cylinder.

[0007] Preferably, the air supply assembly comprises an air pump arranged on one side of the purification tank, and a transfer tank is fixedly connected to one end of an air outlet pipe of the air pump.

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

[0009] Preferably, the device further comprises a pneumatic linkage brush type maintenance mechanism, which comprises a shaft seat arranged in the transfer tank, a fan blade is rotatably arranged on the top of the shaft seat, a shaft rod is arranged at the bottom of the fan blade through a transmission assembly, the shaft rod is arranged at the top of the purification tank and is rotatably connected to the top of the purification tank, and a brush plate is fixedly connected to the bottom of the shaft rod.

[0010] Preferably, the transmission assembly comprises a transmission wheel arranged at the bottom of the fan blade, and a transmission belt is sleeved outside the transmission wheel and is connected to the outside of the bottom of the shaft rod.

[0011] Preferably, the purification tank is further provided with a protection tank on one side, and the protection tank is arranged outside the air pump.

[0012] Preferably, the biological filtration assembly comprises a shell which is slidingly arranged on the inner wall of the purification tank, nano-porous plates are embeddedly arranged in the shell and at the bottom of the shell, hydroxylated ceramsite for biodegradation of the water source is filled at the top of the shell, and activated carbon composite plates for adsorption and purification of the water source are fixedly arranged at the bottom of the shell.

[0013] Preferably, a metal grating plate for separating impurities and rainwater is fixedly arranged at the top of the precipitation tank, a plurality of net plates are fixedly arranged at the bottom of the metal grating plate, and a conveying pipe is fixedly arranged on one side of the precipitation tank and is in communication with one side of the purification tank.

[0014] Preferably, a precipitation groove is further arranged at the bottom of the precipitation tank, and the cross section of the precipitation groove is V-shaped.

[0015] Preferably, an automatic exhaust valve is further arranged at the top of one side of the purification tank.

[0016] The present application provides a garden rainwater collection and purification treatment device based on multi-stage filtration.

[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 11It is a partial view of the shell profile of the present application.

[0030] In the figure: 1, support; 2, sedimentation tank; 201, metal grating plate; 202, mesh plate; 203, sedimentation tank; 204, conveying pipe; 3, purification tank; 301, shell; 302, nano-porous plate; 303, hydroxylated ceramsite; 304, activated carbon composite plate; 4, bubble splitting aeration mechanism; 401, air pump; 402, transfer tank; 403, aeration disc; 404, cylinder; 405, threaded flow guide groove; 406, shaft support; 407, crushing paddle; 5, pneumatic linkage brush type maintenance mechanism; 501, shaft seat; 502, fan blade; 503, transmission wheel; 504, transmission belt; 505, shaft rod; 506, brush plate; 6, protection tank; 7, automatic exhaust valve. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] The first embodiment is as follows:

[0033] Reference Figures 1-11 A garden rainwater collection and purification treatment device based on multi-stage filtration, comprising a support 1, a purification tank 3 is fixedly connected to the top of the support 1, a biological filtration assembly for biodegradation and purification of rainwater is further arranged in the purification tank 3, and a sedimentation tank 2 for rainwater collection is further arranged on the top of the purification tank 3;

[0034] Further comprising a bubble splitting aeration mechanism 4, the bubble splitting aeration mechanism 4 comprises a gas supply assembly arranged on one side of the purification tank 3, the gas supply assembly is provided with a plurality of aeration discs 403 located at the bottom of the purification tank 3, a cylinder 404 is fixedly connected to the top of the aeration disc 403, a threaded flow guide groove 405 for guiding bubbles is formed in the inner side of the cylinder 404, a shaft support 406 is rotatably installed at the top end of the cylinder 404, a crushing paddle 407 for splitting bubbles is rotatably installed at the bottom of the shaft support 406 through a bearing, and the crushing paddle 407 is located at the top of the cylinder 404;

[0035] The gas supply assembly comprises an air pump 401 arranged on one side of the purification tank 3, a transfer tank 402 is fixedly connected to one end of the air pump 401, the transfer tank 402 is connected to the aeration disc 403 through a three-way pipe at the bottom end, the number of the aeration discs 403 is at least three, the aeration discs 403 are micro-porous aeration discs 403, a protection tank 6 is further arranged on one side of the purification tank 3, and the protection tank 6 covers the outer side of the air pump 401.

[0036] The biological filtration assembly comprises a shell 301 slidingly installed on the inner wall of the purification tank 3, the inside and bottom of the shell 301 are embeddedly installed with a nano-porous plate 302, the top of the inside of the shell 301 is filled with hydroxylated ceramsite 303 for biological degradation of the water source, the bottom of the inside of the shell 301 is fixedly connected with an activated carbon composite plate 304 for adsorption purification of the water source, and the top of one side of the purification tank 3 is further provided with an automatic exhaust valve 7.

[0037] After the precipitation tank 2 collects the rainwater and delivers the collected water source to the purification tank 3, the water flow is first dispersed into multiple small water flows by the nano-porous plate 302 embedded at the bottom of the shell 301, and the uniformly distributed micro-porous structure of the nano-porous plate 302 can guide the water body to uniformly penetrate upward to the entire biological filtration area;

[0038] When the water flow flows through the layer of hydroxylated ceramsite 303 filled at the top of the shell 301, the active groups formed on the surface of the ceramsite through the hydroxylated treatment can firmly adhere to a large amount of microorganisms, including heterotrophic bacteria, nitrifying bacteria and the like, to form a stable biofilm, and these microorganisms can decompose organic pollutants such as COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand) in the rainwater into harmless carbon dioxide and water, and convert ammonia nitrogen into nitrate;

[0039] In order to guarantee the oxygen required by the metabolism of the microorganisms, the air pump 401 continuously sucks the air outside, and delivers the air to the multiple groups of aeration discs 403 at the bottom of the purification tank 3 through the transfer tank 402, the bubbles released by the aeration discs 403 supplement the dissolved oxygen of the water body during the rising process, provide sufficient oxygen source for the microorganisms on the hydroxylated ceramsite 303, and discharge the gas through the automatic exhaust valve 7;

[0040] When the water source is discharged, the water flow penetrates downward to the activated carbon composite plate 304 at the bottom of the shell 301, the porous structure of the activated carbon can adsorb trace amounts of organic matter, pigments and part of heavy metal ions remaining in the water, further improve the water quality, and through the water flow distribution of the nano-porous plate 302, the biological degradation of the hydroxylated ceramsite 303 and the oxygen supply of the aeration system, the COD and ammonia nitrogen removal rate of the rainwater is significantly improved, which is more suitable for green water scenes such as garden irrigation, seedling cultivation and the like;

[0041] When the compressed air is released through the aeration disc 403, it first enters the inside of the cylinder 404 fixedly connected at the top of the aeration disc 403, and the closed structure of the cylinder 404 can constrain the initial released dispersed bubbles in a limited space, avoiding the dispersed bubbles from diffusing and escaping to the surroundings without being fully utilized;

[0042] The helical thread guide groove 405 inside the cylinder body 404 spirally ascends and has a guiding effect on the ascending bubble group, forces the bubble to move spirally along the groove, increases the bubble ascending path length, prolongs the contact time of the bubble with the water body, at the same time, the centrifugal force generated by the spiral motion makes the bubble gather to the center of the cylinder body 404, reduces the bubble wall loss phenomenon;

[0043] With the continuous rising of the bubble to the top of the cylinder body 404, the high-speed flowing spiral bubble flow will impact the breaking paddle 407 at the bottom of the shaft support 406, push the paddle to rotate, and the rotating breaking paddle 407 breaks the large bubble into micro-bubbles through the shearing action of the blade, significantly increases the specific surface area of the bubble;

[0044] Through the uniform gas distribution of the aerator plate 403, the space constraint of the cylinder body 404, the path optimization of the thread guide groove 405 and the mechanical breaking of the breaking paddle 407, the water body oxygen dissolving efficiency is improved, the efficient use of the bubble and the oxygen dissolving rate are realized, the problem of insufficient contact between the bubble and the water body and short residence time is solved, the degradation efficiency of the microorganism to the organic pollutants is ensured, and then the water quality requirement of the garden water is met;

[0045] The rainwater treated by the above-mentioned multi-stage purification treatment is collected at the bottom of the purification tank 3, at this time, the drainage pipe at the bottom of one side of the purification tank 3 is connected with the garden irrigation main pipe network or mobile irrigation equipment, and the purified rainwater can be transported to the garden green land, flower nursery, landscape water body and other areas through gravity flow or low-pressure pumping mode for plant irrigation, landscape water supplement and other operations, and this process realizes the recycling of rainwater resources, reduces the dependence of the garden on municipal tap water, and meets the environmental protection concept of water resource saving and recycling;

[0046] The protection box 6 isolates the outside dust, rainwater and plant debris in the garden environment through the closed fence, reduces the risk of impurity suction when the air pump 401 operates, and reduces the influence of equipment operation noise on the surrounding environment.

[0047] The second embodiment is as follows:

[0048] The garden rainwater carries a large amount of impurities through surface runoff, and directly entering the biological purification system can easily cause problems such as filler blockage and inhibited microbial activity;

[0049] Reference Figures 1-3 In the second embodiment of the present application, a metal grating plate 201 for separating impurities and rainwater from the outside is fixed at the top of the sedimentation tank 2, a plurality of net plates 202 are fixed at the bottom of the metal grating plate 201, and a conveying pipe 204 is fixed at one side of the sedimentation tank 2 and is connected with one side of the purification tank 3, and a sedimentation groove 203 is further provided at the bottom of the inside of the sedimentation tank 2, and the cross section of the sedimentation groove 203 is V-shaped.

[0050] The precipitation tank 2 is the first processing unit of the rainwater inlet device, and rainwater from the outside is collected therein. The top metal grid plate 201 adopts a grid structure, and can directly intercept large-size impurities such as dry branches, fallen leaves and plastic fragments in the rainwater, so as to avoid the blockage of the subsequent system caused by the impurities. The mesh plate 202 below the metal grid plate 201 further screens the rainwater, and filters out suspended impurities such as silt groups and small plant residues, so as to realize the grading separation of the rainwater and the impurities.

[0051] After the rainwater is statically deposited in the precipitation tank 2, gravity settling impurities such as silt particles and mineral debris with a relatively large density in the water slide along the inclined inner wall of the bottom V-shaped precipitation groove 203 to the groove bottom for temporary storage, so as to reduce the turbidity of the rainwater.

[0052] The rainwater after the precipitation pretreatment is transported from the water source in the precipitation tank 2 to the inside of the purification tank 3 through the conveying pipe 204. Through the cooperation of the coarse filtration of the metal grid plate 201, the fine filtration of the mesh plate 202 and the sedimentation of the precipitation groove 203, the efficient impurity separation function of the rainwater is realized, and the actual problem that the garden rainwater directly enters the biological purification system due to the large amount of impurities carried by the surface runoff, which easily leads to the blockage of the filler and the inhibition of the microbial activity, is solved.

[0053] The third embodiment:

[0054] After the biological filtration carrier is operated for a long time, excessive biofilm and trapped impurities are easily attached to the surface of the biological filtration carrier, which increases the water flow permeation resistance and reduces the filtration efficiency. Therefore, the biological filtration carrier needs to be manually disassembled and cleaned regularly, which is complicated to maintain and affects the continuous operation efficiency of the device.

[0055] Reference Figures 5-8 In the third embodiment of the present application, the pneumatic linkage brush type maintenance mechanism 5 is further included. The pneumatic linkage brush type maintenance mechanism 5 includes a shaft seat 501 arranged in the transfer tank 402. A fan blade 502 is rotatably installed on the top of the shaft seat 501. A shaft rod 505 is installed at the bottom end of the fan blade 502 through a transmission assembly. The shaft rod 505 is located at the top inside of the purification tank 3 and is rotatably connected to the top inside of the purification tank 3. A brush plate 506 is fixedly connected to the bottom end of the shaft rod 505.

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

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

[0058] The shaft 505 rotates under the drive of the transmission belt 504, and the brush plate 506 fixed at the bottom end thereof rotates to form a continuous flexible contact with the surface of the nano-porous plate 302 on the top of the shell 301, thereby removing the excess biofilm and small impurities trapped on the surface of the nano-porous plate 302, avoiding the blockage of the nano-porous plate 302 by the attachments, and achieving the dynamic maintenance of the carrier surface by the use of the brush plate 506 in cooperation with the power transmission assembly driven by the pneumatic drive, thereby solving the problem of the increase of the water flow permeation resistance and the decrease of the filtration efficiency caused by the accumulation of the attachments on the surface of the nano-porous plate 302 after the long-term operation of the biological filtration assembly, and ensuring the water flow in the biological filtration assembly.

[0059] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application 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 (1), characterized in that: The support (1) top fixed connection has the purification tank (3), the purification tank (3) inside still is provided with for rainwater biological degradation and purification biological filter assembly, and the purification tank (3) top still is provided with for rainwater collection sedimentation tank (2); Still include bubble split aeration mechanism (4), the bubble split aeration mechanism (4) includes the gas supply assembly of being arranged in the purification tank (3) one side, the gas supply assembly gas supply end is provided with multiple groups of aeration disc (403) at the bottom of the inside of the purification tank (3), the aeration disc (403) top fixed connection has the cylinder (404), the cylinder (404) inside is provided with thread flow guide groove (405) for guiding the bubble, and the cylinder (404) top end rotationally mounted has the shaft support (406), the shaft support (406) bottom rotationally mounted has the crushing paddle (407) for splitting the bubble, and the crushing paddle (407) is located at the top of the inside of the cylinder (404).

2. The garden rainwater collection and purification device based on multi-stage filtration according to claim 1, characterized in that: The gas supply assembly includes a gas pump (401) arranged on one side of the purification tank (3), and the gas pump (401) is provided with a transfer tank (402) at one end of the gas outlet pipe.

3. The garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: The aeration disc (403) is at least three groups, and the aeration disc (403) is a microporous aeration disc.

4. The garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: Still include pneumatic linkage brush type maintenance mechanism (5), the pneumatic linkage brush type maintenance mechanism (5) includes the shaft seat (501) that is arranged in the transfer tank (402) inside, the shaft seat (501) top rotationally mounted has the fan blade (502), the fan blade (502) bottom is installed with the shaft rod (505) through the transmission assembly, and the shaft rod (505) is located at the top of the inside of the purification tank (3) and is rotationally connected with the top of the inside of the purification tank (3), the shaft rod (505) bottom fixed connection has the brush plate (506).

5. The 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) arranged at the bottom of the fan blade (502), and a transmission belt (504) is sleeved on the outside of the transmission wheel (503), and the transmission belt (504) is connected with the outside of the bottom of the shaft rod (505).

6. The garden rainwater collection and purification device based on multi-stage filtration according to claim 2, characterized in that: The purification tank (3) one side is also provided with the protection tank (6), and the protection tank (6) is covered outside the gas pump (401).

7. The multi-stage filtration based garden rainwater collection and purification device according to claim 1, characterized in that: The biological filter assembly includes a shell (301) slidingly installed on the inner wall of the purification tank (3), the inside and the bottom of the shell (301) are embedded with a nano porous plate (302), and the inside of the shell (301) is filled with a hydroxylated ceramsite (303) for biological degradation of water source, and the bottom of the inside of the shell (301) is fixedly connected with an activated carbon composite plate (304) for adsorption purification of water source.

8. The multi-stage filtration based garden rainwater collection and purification treatment device according to claim 1, characterized in that: The sedimentation tank (2) top fixed connection has the metal grating plate (201) for separating impurities and rainwater from the outside, the metal grating plate (201) bottom fixed connection has multiple groups of net plate (202), and the sedimentation tank (2) one side is fixedly connected with the conveying pipe (204) penetratingly connected with the one side of the purification tank (3).

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

10. The multi-stage filtration based garden rainwater collection and purification treatment device according to claim 1, characterized in that: The top of one side of the purification tank (3) is further provided with an automatic exhaust valve (7).

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