Sewage purification device and method

Abstract

The present invention relates to a sewage purification treatment device and method. The device comprises a tank body, and a sewage collecting hopper, an aeration assembly, a stirring assembly, a dosing assembly, a filter assembly, and a water outlet pipe arranged sequentially therein from bottom to top. The tank body is also provided with a sewage pipe interposed between the sewage collecting hopper and the stirring assembly. The filter assembly comprises a coarse filter unit and a fine filter unit located above the coarse filter unit. The fine filter unit is also provided with a dispersion disk at the bottom, and an inlet hood connected to the dispersion disk is provided between the coarse filter unit and the fine filter unit. Compared with the prior art, the present invention, by providing an aeration mechanism, a dosing assembly, and a stirring mechanism, ensures that chemicals fully contact the sewage and that the filter assembly performs circulating filtration, effectively enhancing the sewage treatment effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage purification and treatment, and relates to a sewage purification and treatment device and method. Background Art

[0002] In the process of production or life, various industrial wastewater and domestic sewage are generated. In order to make the sewage meet the water quality requirements for drainage or reuse of a certain water body, sewage purification equipment is usually used to treat and purify the sewage.

[0003] In the prior art, sewage purification treatment equipment generally uses physical methods such as filtration, sedimentation, and centrifugal separation to filter and separate pollutants in sewage, thereby achieving the purpose of purifying sewage.

[0004] When using existing sewage purification equipment, it is inconvenient to add treatment agents. During the addition process, the treatment agents cannot be fully mixed with the sewage, resulting in poor chemical treatment effect on the sewage, affecting the coagulation and chemical precipitation effects of the sewage, and insufficient treatment of harmful substances in the sewage. Summary of the Invention

[0005] The purpose of the present invention is to provide a sewage purification treatment device and method, which can make the chemical agent fully contact with the sewage and make the filter component perform circulating filtration, thereby effectively enhancing the treatment effect of the sewage.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] One of the technical solutions of the present invention provides a sewage purification treatment device, including a tank body, and a sewage collecting hopper, an aeration assembly, a stirring assembly, a dosing assembly, a filter assembly and a water outlet pipe arranged in the tank body from bottom to top. The tank body is also provided with a sewage pipe between the sewage collecting hopper and the stirring assembly. The filter assembly includes a coarse filter unit and a fine filter unit located above the coarse filter unit. A dispersion disk is also provided at the bottom of the fine filter unit, and a water inlet cover connected to the dispersion disk is also provided between the coarse filter unit and the fine filter unit.

[0008] Furthermore, the coarse filtration unit includes a coarse filtration frame arranged in the tank body, and one or more filter screens installed on the coarse filtration frame and spaced apart from each other.

[0009] Furthermore, the fine filtration unit includes a filter box installed in the tank body and with an open top, and a quartz sand bed arranged in the filter box. An activated carbon plate is also provided above the filter box.

[0010] Furthermore, a plurality of water distributors connected to the water inlet hood are evenly distributed on the dispersion plate.

[0011] Furthermore, the aeration assembly includes a plurality of aeration pipes distributed in the tank body, an air inlet pipe connected to the aeration pipes, and a blower connected to the air inlet pipe.

[0012] Furthermore, the stirring assembly includes a stirring rod that is rotatably placed horizontally in the tank body, and a plurality of stirring blades are arranged on the stirring rod along its axial direction. A stirring motor connected to the stirring rod is also provided outside the tank body.

[0013] Furthermore, the dosing assembly includes a drug-distributing ring arranged in the tank body, a mixing chamber located at the top outside the tank body, and a drug storage tank arranged on the top of the mixing chamber. The inner surface of the drug-distributing ring is distributed with a number of drug-distributing holes. The drug-distributing ring is connected to the mixing chamber through a delivery pipe. The mixing chamber is also provided with a connecting pipe extending into the tank body.

[0014] Furthermore, a cofferdam covering the connecting pipe and the water outlet pipe is provided on the inner wall of the tank.

[0015] Furthermore, the delivery pipe is also provided with a dosing pump.

[0016] A second technical solution of the present invention provides a sewage purification method, which is based on the sewage purification device described above, and includes the following steps:

[0017] (1) The sewage is sent into the tank through the sewage pipe. Then, the aeration component works to continuously diffuse air into the sewage for aeration and oxygenation.

[0018] (2) The sewage continues to flow upward inside the tank, is initially filtered through the coarse filter unit, and then flows into the dispersion plate through the water inlet cover. It is then evenly diffused through the dispersion plate inside the fine filter unit for further filtration, and then flows to the top of the tank;

[0019] (3) The sewage purified in step (2) is mixed with a coagulant as a solvent and then fed into a dosing component, where the solvent is evenly diffused into the sewage so that the coagulant and the sewage are mixed. Under the action of a stirring component, impurities in the sewage are coagulated and precipitated.

[0020] (4) The sewage after coagulation and sedimentation continues to flow upward, and is then filtered and purified in the coarse filtration unit and the fine filtration unit in turn, and finally discharged through the outlet pipe.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The sewage purification treatment equipment and treatment method thereof are provided with an aeration component, a dosing component and a stirring component, etc., wherein chemical agents are stored in a drug storage tank, and the treated sewage can be utilized through a mixing chamber to reduce the waste of water resources, and the agents and water are dissolved and mixed, and the agents can be evenly added to the sewage through a drug distribution ring, and the sewage and the agents are mixed and stirred through the aeration component and the stirring component, so that the chemical agents are fully in contact with the sewage, thereby improving the chemical treatment effect of the sewage and effectively reducing harmful substances in the sewage.

[0023] (2) The sewage purification treatment equipment and treatment method thereof are provided with a filter assembly. The filter screen can remove larger pollutants in the sewage. The filter box can further filter the sewage through the quartz sand bed to effectively remove solid pollutants in the sewage. Afterwards, the sewage can be adsorbed and purified by the activated carbon plate. The coarse filter frame, the filter box and the activated carbon plate cooperate with each other to filter and purify the sewage layer by layer. The filter assembly and the dosing assembly cooperate with each other to filter the sewage in a cycle, effectively enhancing the filtration treatment effect of the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the processing device of the present invention;

[0025] Figure 2 is a schematic cross-sectional view of a processing device of the present invention;

[0026] Figure 3 It is a structural diagram of the top of the tank;

[0027] Figure 4 It is a structural diagram of the aeration component;

[0028] Figure 5 It is a structural diagram of the dosing component;

[0029] Figure 6 Schematic diagram of the structure of the stirring component;

[0030] Figure 7 is a schematic diagram of the structure of the filter component;

[0031] Figure 8 Schematic diagram of the structure inside the filter box;

[0032] Figure 9 It is a structural diagram of the sewage collecting hopper;

[0033] Figure 10 It is a structural diagram of the aeration pipe part;

[0034] Description of the marks in the figure:

[0035] 1-tank body; 11-sewage pipe; 12-sewage collecting hopper; 121-drain pipe; 13-cofferdam; 14-outlet pipe; 2-air inlet pipe; 21-aeration pipe; 22-aeration head; 23-blower; 3-drug storage tank; 31-mixing chamber; 311-drug inlet pipe; 312-connecting pipe; 32-delivery pipe; 321-dosing pump; 322-drug distribution ring; 4-stirring rod; 41-stirring blade; 42-sealing seat; 43-stirring motor; 5-coarse filter rack; 51-filter screen; 6-filter box; 61-water inlet cover; 62-dispersion plate; 621-water distributor; 7-activated carbon plate. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0037] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional structures or conventional components used in the art to achieve corresponding functions.

[0038] In order to effectively enhance the filtration effect of sewage, the present invention provides a sewage purification device, the structure of which can be seen in Figures 1 to 10 As shown, it includes a tank body 1, and a sewage collecting hopper 12, an aeration component, a stirring component, a dosing component, a filtering component and a water outlet pipe 14 arranged in sequence from bottom to top in the tank body 1. The tank body 1 is also provided with a sewage pipe 11 between the sewage collecting hopper 12 and the stirring component. The filtering component includes a coarse filter unit and a fine filter unit located above the coarse filter unit. A dispersion plate 62 is also provided at the bottom of the fine filter unit, and a water inlet cover 61 connected to the dispersion plate 62 is also provided between the coarse filter unit and the fine filter unit.

[0039] In some specific embodiments, please refer to Figure 2 As shown in FIG. 1 , the coarse filtration unit includes a coarse filtration frame 5 disposed in the tank body 1 , and one or more filter screens 51 installed on the coarse filtration frame 5 at intervals up and down.

[0040] In some specific embodiments, please refer to Figure 2 As shown in FIG. 1 , the fine filtration unit includes a filter box 6 installed in the tank body 1 and with an open top, and a quartz sand bed arranged in the filter box 6 . An activated carbon plate 7 is also provided above the filter box 6 .

[0041] In some specific embodiments, please refer to Figure 2As shown in FIG. 1 , a plurality of water distributors 621 connected to the water inlet cover 61 are evenly distributed on the dispersion plate 62. The water distributor 621 is used to evenly distribute the sewage fed through the water inlet cover 61 to all directions at the bottom of the fine filtration unit. The water distributor 621 can be a water distribution structure that can realize water discharge in different directions.

[0042] In some specific embodiments, please refer to Figure 4 As shown in , the aeration assembly includes a plurality of aeration pipes 21 distributed in the tank body 1 , an air inlet pipe 2 connected to the aeration pipe 21 , and a blower 23 connected to the air inlet pipe 2 .

[0043] In some specific embodiments, please refer to Figure 6 As shown in FIG. 1 , the stirring assembly includes a stirring rod 4 that is rotatably placed horizontally in the tank body 1 , and a plurality of stirring blades 41 are arranged on the stirring rod 4 along its axial direction. A stirring motor 43 connected to the stirring rod 4 is also provided outside the tank body 1 .

[0044] In some specific embodiments, please refer to Figure 5 As shown in the figures, the dosing assembly includes a drug-distributing ring 322 arranged in the tank body 1, a mixing chamber 31 located at the top outside the tank body 1, and a drug storage tank 3 arranged on the top of the mixing chamber 31. The inner surface of the drug-distributing ring 322 is provided with a plurality of drug-distributing holes. The drug-distributing ring 322 is connected to the mixing chamber 31 through a delivery pipe 32. The mixing chamber 31 is also provided with a connecting pipe 312 extending into the tank body 1.

[0045] In a more specific embodiment, a cofferdam 13 is further provided on the inner wall of the tank body 1 to enclose the connecting pipe 312 and the water outlet pipe 14 .

[0046] In a more specific embodiment, the delivery pipe 32 is further provided with a dosing pump 321 .

[0047] The above embodiments may be implemented individually or in any combination of two or more.

[0048] The above implementation is described in more detail below with reference to specific examples.

[0049] Example 1:

[0050] In order to effectively enhance the filtering and treatment effect of sewage, this embodiment provides a sewage purification device, which includes a tank body 1. A sewage pipe 11 is provided on the left side of the tank body 1 near the bottom end. A sewage valve is installed on the outside of the sewage pipe 11. The sewage can flow into the interior of the tank body 1 for treatment through the sewage pipe 11.

[0051] An aeration assembly is provided inside the tank body 1 and near the bottom end, for continuously delivering air to the bottom end of the tank body 1;

[0052] A dosing assembly is provided on the left side of the tank body 1 and above the aeration assembly. The dosing assembly includes a drug storage tank 3, a mixing chamber 31 and a delivery pipe 32, and is used to add the treatment agent into the interior of the tank body 1;

[0053] A stirring assembly is provided inside the tank 1 and between the aeration assembly and the dosing assembly, for stirring and mixing the agent and the sewage;

[0054] A filter assembly is provided inside the tank body 1 and near the top. The filter assembly includes a coarse filter frame 5, a filter box 6 and an activated carbon plate 7, which is used for multiple filtration and purification of sewage.

[0055] A sewage collecting hopper 12 is welded and fixed inside the tank body 1 and below the sewage pipe 11. A sewage discharge pipe 121 is provided at the bottom of the sewage collecting hopper 12 and passes through the tank body 1. A sewage discharge valve is installed on the outside of the sewage discharge pipe 121. The sewage collecting hopper 12 can collect solid sediment inside the tank body 1 and discharge it to the outside through the sewage discharge pipe 121.

[0056] A mutually symmetrical cofferdam 13 is welded and fixed to the top of the tank body 1. A number of evenly distributed water inlets are provided on the top of the cofferdam 13. The cofferdam 13 can further block the water body at the top of the tank body 1, slow down the flow of the water body, and allow the evolved water body to flow into the interior of the cofferdam 13 through the water inlet. An outlet pipe 14 is provided on the right side of the cofferdam 13, and an outlet valve is installed on the outside of the outlet pipe 14. The purified water body can be discharged through the outlet pipe 14.

[0057] The aeration assembly includes an air inlet pipe 2 and an aeration pipe 21. The air inlet pipe 2 is arranged below the sewage collecting hopper 12 and extends to the right side of the tank body 1. The aeration pipes 21 are distributed in a circular array above the air inlet pipe 2 and are integrally formed with the air inlet pipe 2. The aeration pipe 21 passes through the sewage collecting hopper 12 and extends to the top of the sewage collecting hopper 12. A number of evenly distributed aeration heads 22 are installed on the aeration pipe 21. A blower 23 connected to the air inlet pipe 2 is installed on the right side of the tank body 1. When the blower 23 is running, air is continuously transported into the aeration pipe 21 through the air inlet pipe 2, and the air is transported to the inside of the tank body 1 through the aeration head 22, thereby aerating and oxygenating the sewage to supply the oxygen required for aerobic biological metabolism. At the same time, the aeration pipes 21 distributed in a circular array can transport air in multiple directions, thereby improving the flow effect of the sewage and making the various phases of matter above the sewage collecting hopper 12 in a suspended state, which is convenient for mixing the reagents and sewage.

[0058] The medicine storage tank 3 is installed on the top of the tank body 1, and the treatment agent is stored in the medicine storage tank 3. The mixing chamber 31 is arranged below the medicine storage tank 3 and is welded and fixed to the side wall of the tank body 1. The top of the mixing chamber 31 is provided with a medicine inlet pipe 311 connected to the medicine storage tank 3. A regulating valve is installed on the outside of the medicine inlet pipe 311, which can adjust and control the amount of medicine flowing from the medicine storage tank 3 into the mixing chamber 31. A connecting pipe 312 is provided on the right side of the mixing chamber 31, and the connecting pipe 312 extends to the inside of the left cofferdam 13. The purified water in the left cofferdam 13 flows into the inside of the mixing chamber 31 through the connecting pipe 312, so that the water is mixed with the agent, thereby dissolving the powdered agent and facilitating the addition of the agent.

[0059] The delivery pipe 32 is arranged below the mixing chamber 31, and a dosing pump 321 is installed at the top of the delivery pipe 32 and inside the mixing chamber 31. The bottom end of the delivery pipe 32 passes through the side wall of the tank body 1 and extends to the top of the aeration pipe 21. The bottom end of the delivery pipe 32 and inside the tank body 1 is provided with an obliquely arranged medicine distribution ring 322. The medicine distribution ring 322 is fixedly connected to the inner wall of the tank body 1 by bolts. When the dosing pump 321 is running, the mixed and dissolved reagents in the mixing chamber 31 can be delivered to the medicine distribution ring 322 through the delivery pipe 32, so that the reagents flow evenly along the inner wall of the medicine distribution ring 322 and are evenly added to the interior of the tank body 1 through the medicine distribution ring 322.

[0060] The stirring assembly includes a stirring rod 4 and a stirring blade 41. The stirring rod 4 is arranged between the aeration pipe 21 and the medicine distribution ring 322. The stirring rod 4 passes through the left side of the tank body 1 and is rotatably connected to the side wall of the tank body 1. The stirring blade 41 is evenly distributed on the stirring rod 4 and is welded and fixed to the stirring rod 4. A sealing seat 42 is welded and fixed on the tank body 1 and located on the outside of the stirring rod 4. The sealing seat 42 can be sealed on the outside of the stirring rod 4 to prevent the sewage inside the tank body 1 from penetrating outward through the connection between the stirring rod 4 and the tank body 1. A motor 43 is installed on the left side of the tank body 1. The output shaft of the motor 43 is coaxially connected to the stirring rod 4. When the motor 43 is running, it can drive the stirring rod 4 to rotate, so that the stirring rod 4 drives the stirring blade 41 to rotate and stirs the inside of the tank body 1, thereby improving the mixing effect of the medicine and sewage, and facilitating the treatment and purification of sewage.

[0061] The coarse filter frame 5 is arranged above the medicine distribution ring 322 and is fixedly connected to the inner wall of the tank body 1 by bolts. A number of evenly distributed filter screens 51 are provided on the inner side of the coarse filter frame 5. The filter box 6 is arranged above the coarse filter frame 5 and is fixedly connected to the inner wall of the tank body 1 by bolts. A quartz sand bed is provided inside the filter box 6, and an activated carbon plate 7 is installed above the filter box 6. The filter screen 51 can be used to perform preliminary filtration on the sewage to remove larger pollutants in the sewage. After that, the quartz sand bed can further filter the sewage to effectively remove solid pollutants in the sewage. Then, the activated carbon plate 7 can be used to adsorb and purify the sewage to further improve the treatment effect of the sewage.

[0062] A water inlet cover 61 is provided below the filter box 6. The top of the water inlet cover 61 extends to the interior of the filter box 6 and is welded and fixed to the filter box 6. A dispersion plate 62 is installed at the bottom of the filter box 6 and on the outside of the water inlet cover 61. A number of evenly distributed water dividers 621 are installed on the top of the dispersion plate 62. The water inlet cover 61 can block and guide the sewage at the bottom of the filter box 6 so that the sewage flows into the interior of the dispersion plate 62. After that, the sewage is evenly diffused into the interior of the filter box 6 through the water divider 621, which facilitates the quartz sand bed to filter and purify the sewage.

[0063] Working principle: When the equipment is in use, first, the sewage valve is opened, and the sewage is transported to the top of the sewage collecting hopper 12 through the sewage pipe 11. Then, the blower 23 is operated, and air is continuously transported to the aeration pipe 21 through the air inlet pipe 2, so that the aeration head 22 aerates and oxygenates the sewage, so that the pollutants in the sewage remain in a suspended state;

[0064] The sewage continues to flow upward, and the filter screen 51 performs preliminary filtration on the sewage to remove larger pollutants. After that, the sewage flows into the dispersion plate 62 through the water inlet cover 61, and is evenly diffused into the interior of the filter box 6 through the water separator 621, so that the quartz sand bed further filters it. After that, the sewage is filtered and purified by the activated carbon plate 7 and flows to the top of the tank body 1.

[0065] Furthermore, the medicine inside the medicine storage tank 3 flows into the mixing chamber 31 through the medicine inlet pipe 311. At the same time, the water inside the left cofferdam 13 flows into the mixing chamber 31 through the connecting pipe 312 to dissolve the medicine. Then, the dosing pump 321 is operated to deliver the medicine to the medicine distribution ring 322 through the delivery pipe 32, so that the medicine is evenly diffused into the sewage. Then, the motor 43 is operated to drive the stirring rod 4 to rotate, so that the stirring blade 41 stirs the medicine and sewage, thereby improving the mixing effect.

[0066] Finally, the sewage produces coagulation and sedimentation above the sewage collecting hopper 12, and is filtered and purified in sequence through the coarse filter frame 5, the filter box 6 and the activated carbon plate 7, and the purified water is discharged through the outlet pipe 14, thereby circulating the sewage and improving the sewage treatment effect.

[0067] On the other hand, this embodiment also provides a treatment method for a sewage purification treatment device, including any of the above-mentioned sewage purification treatment devices, and the operating steps are as follows:

[0068] S1: Aeration and oxygenation: The sewage is transported to the interior of the tank 1 through the sewage pipe 11. Then, the blower 23 is operated to continuously transport air to the aeration pipe 21. The air is diffused into the sewage through the aeration head 22 for aeration and oxygenation;

[0069] S2: Preliminary filtration treatment: The sewage continues to flow upward inside the tank body 1, and the filter screen 51 performs preliminary filtration on the sewage. After that, the sewage flows into the dispersion plate 62 through the water inlet cover 61, and is evenly diffused into the interior of the filter box 6 through the water separator 621, so that the quartz sand bed further filters the sewage. After that, the sewage is filtered and purified by the activated carbon plate 7 and flows to the top of the tank body 1;

[0070] S3: Mixing of chemicals. The purified sewage flows into the cofferdam 13. The water in the left cofferdam 13 flows into the mixing chamber 31 through the connecting pipe 312. Then, the regulating valve on the drug inlet pipe 311 is opened to allow the chemicals in the drug storage tank 3 to flow into the mixing chamber 31 for mixing.

[0071] S3: Adding the reagent: The dosing pump 321 is operated to deliver the reagent to the drug distribution ring 322 through the delivery pipe 32, so that the reagent is evenly diffused into the sewage and mixed with the sewage. Then, the motor 43 is operated to drive the stirring rod 4 to rotate, so that the stirring blade 41 stirs the reagent and sewage, causing impurities in the sewage to coagulate and precipitate;

[0072] S5: Circular filtration, so that the sewage after coagulation and sedimentation continues to flow upward, and is filtered and purified in sequence by the coarse filter frame 5, the filter box 6 and the activated carbon plate 7. After that, the purified sewage flows into the right cofferdam 13 and is discharged through the outlet pipe 14.

[0073] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A sewage purification device, characterized in that: The invention comprises a tank body, and a sewage collecting hopper, an aeration assembly, a stirring assembly, a dosing assembly, a filter assembly and a water outlet pipe arranged in sequence from bottom to top in the tank body. The tank body is also provided with a sewage pipe between the sewage collecting hopper and the stirring assembly. The filter assembly includes a coarse filter unit and a fine filter unit located above the coarse filter unit. A dispersion disk is further provided at the bottom of the fine filter unit. A water inlet cover connected to the dispersion disk is further provided between the coarse filter unit and the fine filter unit. The dosing assembly includes a drug-distributing ring disposed in the tank body, a mixing chamber located on the top of the outer side of the tank body, and a drug storage tank disposed on the top of the mixing chamber. The inner surface of the drug-distributing ring is provided with a plurality of drug-distributing holes. The drug-distributing ring and the mixing chamber are connected by a delivery pipe. The mixing chamber is also provided with a connecting pipe extending into the tank body. Symmetrical cofferdams are welded and fixed on the top of the tank body. The water inside the left cofferdam flows into the mixing chamber through the connecting pipe to dissolve the reagent.

2. A sewage purification device according to claim 1, characterized in that: The coarse filter unit comprises a coarse filter frame arranged in a tank body, and one or more filter screens installed on the coarse filter frame and spaced up and down.

3. A sewage purification device according to claim 1, characterized in that: The fine filtration unit includes a filter box installed in a tank body and having an open top, and a quartz sand bed arranged in the filter box. An activated carbon plate is also provided above the filter box.

4. A sewage purification device according to claim 1, characterized in that: A plurality of water distributors connected with the water inlet cover are evenly distributed on the dispersion plate.

5. The sewage purification device according to claim 1, characterized in that: The aeration assembly comprises a plurality of aeration pipes distributed in the tank body, an air inlet pipe connected to the aeration pipes, and a blower connected to the air inlet pipe.

6. The sewage purification device according to claim 1, characterized in that: The stirring assembly comprises a stirring rod which is rotatably arranged transversely in the tank body, a plurality of stirring blades are arranged on the stirring rod along its axial direction, and a stirring motor connected to the stirring rod is also provided outside the tank body.

7. The sewage purification device according to claim 1, characterized in that: The delivery pipe is also provided with a dosing pump.

8. A sewage purification method, based on the sewage purification device according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: (1) The sewage is sent into the tank through the sewage pipe. Then, the aeration component works to continuously diffuse air into the sewage for aeration and oxygenation. (2) The sewage continues to flow upward inside the tank, is initially filtered through the coarse filter unit, and then flows into the dispersion plate through the water inlet cover. It is then evenly diffused through the dispersion plate inside the fine filter unit for further filtration, and then flows to the top of the tank; (3) The sewage purified in step (2) is mixed with a coagulant as a solvent and then fed into a dosing component, where the solvent is evenly diffused into the sewage, so that the coagulant and sewage are mixed. Under the action of the stirring component, the impurities in the sewage are coagulated and precipitated. (4) The sewage after coagulation and sedimentation continues to flow upward, and is then filtered and purified in the coarse filtration unit and the fine filtration unit in turn, and finally discharged through the outlet pipe.

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