Sewage treatment system

Abstract

The utility model discloses a sewage treatment system which comprises a sedimentation tank, an anaerobic tank and an aeration tank, and the sedimentation tank is used for settling solid impurities in sewage. The anaerobic tank is used for receiving the sewage guided out by the sedimentation tank and carrying out anaerobic fermentation on the sewage; the aeration tank comprises a first tank body, an aeration part and an air floating part, the first tank body receives sewage guided out by the anaerobic tank, the aeration part guides air into the first tank body, and the air floating part is arranged at the bottom of the first tank body and has a first state of outputting airflow and raising sludge; and a second state in which the output of the airflow is stopped. Due to the fact that sewage is settled through the settling pond in advance, the total amount of sludge in the first pond body is small, the aeration pond is desilted in an air flotation mode, and compared with a traditional mechanical desilting mode, the air flotation desilting mode is more efficient.

Description

Technical Field

[0001] The utility model relates to the field of sewage purification, in particular to a sewage treatment system. Background Art

[0002] A wastewater treatment system is a collection of equipment and processes used to treat and clean wastewater, designed to remove or reduce pollutants and harmful substances in wastewater to a certain standard so that it can be safely discharged into the environment or recycled.

[0003] The existing sewage treatment system can be found in the patent with application number CN202022791994.7, which gradually purifies the sewage by filtering, anaerobic fermentation and aerobic fermentation. However, with the gradual use of sewage treatment systems, sludge will accumulate at the bottom of each pool of the sewage treatment system. Mechanical equipment, such as sludge pumps, mixers or silt removers, are usually used to extract the sludge at the bottom by mechanical stirring or suction. Since the sewage has been precipitated in the sedimentation tank in advance, the total amount of sludge in the aeration tank is relatively small, and it is not efficient to use mechanical silt removal to dredge the aeration tank.

[0004] Therefore, how to improve the dredging efficiency of aeration ponds is a technical problem that needs to be solved urgently. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies, propose a sewage treatment system, and solve the technical problem of how to improve the desilting efficiency of an aeration tank in the prior art.

[0006] In order to achieve the above technical objectives, the technical solution of the utility model includes a sewage treatment system, which includes:

[0007] Sedimentation tanks, which are used to precipitate solid impurities in sewage;

[0008] an anaerobic tank, which receives the sewage discharged from the sedimentation tank and performs anaerobic fermentation on the sewage; and

[0009] The aeration tank comprises a first tank body, an aeration element and an air flotation element. The first tank body receives sewage discharged from the anaerobic tank. The aeration element introduces air into the first tank body. The air flotation element is installed at the bottom of the first tank body and has a first state of outputting air flow and raising sludge, and a second state of stopping outputting air flow.

[0010] Preferably, the aeration element includes a plurality of aeration cylinders and a first air supply pipe, the plurality of aeration cylinders are arranged in the first tank body, and a plurality of aeration holes are opened on the outer circumference of the aeration cylinders, and the first air supply pipe connects the plurality of aeration cylinders to introduce air into the aeration cylinders.

[0011] Preferably, the first air supply pipe includes a main pipe and a plurality of branch pipes corresponding one-to-one to the plurality of aeration cylinders, one end of the branch pipe is connected to the main pipe, and the other end thereof is connected to the aeration cylinder.

[0012] Preferably, the aeration cylinder is vertically arranged in the first tank body.

[0013] Preferably, the air flotation member includes a plurality of nozzles and a second air supply pipe, the plurality of nozzles are arranged at the bottom of the first pool body, and the second air supply pipe is connected to the plurality of nozzles to supply air to the nozzles.

[0014] Preferably, the nozzle includes a connecting seat and a nozzle, the connecting seat is installed on the second air supply pipe, the nozzle can be rotatably installed on the connecting seat and connected to the second air supply pipe, and a plurality of air flotation holes are opened on the periphery of the nozzle, and the airflow derived from the air flotation holes can push the nozzle to rotate relative to the connecting seat.

[0015] Preferably, a plurality of receiving grooves are formed at the bottom end of the first pool body, and the plurality of nozzles are embedded in the plurality of receiving grooves in a one-to-one correspondence.

[0016] Preferably, the connecting seat is detachably connected to the second air supply pipe.

[0017] Preferably, a dredging port is provided at the bottom end of the first tank body, and a dredging valve is also installed at the dredging port, and the dredging valve controls the opening and closing of the dredging port.

[0018] Preferably, a filter grid is installed between the sedimentation tank and the anaerobic tank.

[0019] Compared with the prior art, the beneficial effects of the utility model include: the sedimentation tank is used to precipitate the solid impurities in the sewage, and then the sewage can be anaerobically fermented with the help of the anaerobic tank, and the sewage after anaerobic fermentation is introduced into the first tank body. As the aeration element continuously introduces air into the tank body, the sewage in the first tank body can be aerobically fermented. When it is necessary to dredge the aeration tank, the sludge can be lifted by the flotation element so that the sludge is scattered in the water so that the sludge can be discharged together with the water. Since the sewage is precipitated in the sedimentation tank in advance, the total amount of sludge in the first tank body is small, and the technical solution of the utility model uses flotation to dredge the aeration tank. Compared with the traditional mechanical dredging method, the flotation dredging method is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the sewage treatment system of the utility model embodiment;

[0021] Figure 2 This is a schematic diagram of the internal structure of the aeration cylinder of the utility model embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the nozzle of the utility model embodiment;

[0023] Among them, the sedimentation tank 100, the filter grid 110, the anaerobic tank 200, the aeration tank 300, the first tank body 310, the receiving tank 311, the dredging port 312, the dredging valve 313, the aeration element 320, the aeration cylinder 321, the aeration hole 3211, the first air supply pipe 322, the main pipe 3221, the branch pipe 3222, the flotation element 330, the nozzle 331, the connecting seat 3311, the nozzle 3312, the flotation hole 33121, and the second air supply pipe 332. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] See also Figures 1 to 3 The embodiment of the utility model provides a sewage treatment system, which belongs to the field of sewage purification. The sewage treatment system is used to purify sewage. The aeration tank 300 is desilted by flotation using the above-mentioned sewage treatment system. Compared with the traditional mechanical desilting method, the flotation desilting method is more efficient.

[0026] In some preferred embodiments, the sewage treatment system includes a sedimentation tank 100, an anaerobic tank 200 and an aeration tank 300. The sedimentation tank 100 is used to precipitate solid impurities in the sewage. The anaerobic tank 200 receives the sewage discharged from the sedimentation tank 100 and performs anaerobic fermentation on the sewage. The aeration tank 300 includes a first tank body 310, an aeration element 320 and an air flotation element 330. The first tank body 310 receives the sewage discharged from the anaerobic tank 200. The aeration element 320 introduces air into the first tank body 310. The air flotation element 330 is installed at the bottom of the first tank body 310 and has a first state of outputting airflow and raising sludge, and a second state of stopping outputting airflow.

[0027] In the above embodiment, the sedimentation tank 100 is used to precipitate solid impurities in the sewage, and then the sewage can be anaerobically fermented by means of the anaerobic tank 200. The sewage after anaerobically fermentation is introduced into the first tank body 310. As the aeration element 320 continuously introduces air into the tank body, the sewage in the first tank body 310 can be aerobically fermented. When the aeration tank 300 needs to be desilted, the air flotation element 330 can be used to lift the sludge so that the sludge is scattered in the water so that the sludge can be discharged together with the water. Since the sewage is precipitated in the sedimentation tank 100 in advance, the total amount of sludge in the first tank body 310 is small, and the technical solution of the utility model uses air flotation to desilt the aeration tank 300. Compared with the traditional mechanical desilting method, the air flotation desilting method is more efficient.

[0028] In some preferred embodiments, the aeration element 320 includes a plurality of aeration cylinders 321 and a first air supply pipe 322 . The plurality of aeration cylinders 321 are disposed in the sedimentation tank 100 , and a plurality of aeration holes 3211 are opened on the outer periphery of the aeration cylinders 321 . The first air supply pipe 322 connects the plurality of aeration cylinders 321 to introduce air into the aeration cylinders 321 .

[0029] In the above embodiment, air is introduced into the aeration cylinder 321 through the first air supply pipe 322, and the air is dispersed into the sewage through the aeration holes 3211, so that the air and sewage are in full contact, so as to facilitate aerobic fermentation of the sewage.

[0030] Any implementation of the first air supply pipe 322 is feasible as long as it can supply air to each aeration cylinder 321. In some preferred embodiments, the first air supply pipe 322 includes a main pipe 3221 and a plurality of branch pipes 3222 corresponding to the plurality of aeration cylinders 321. One end of the branch pipe 3222 is connected to the main pipe 3221, and the other end thereof is connected to the aeration cylinder 321. The branch pipe 3222 delivers air to the middle of the aeration cylinder 321, rather than to the end of the aeration cylinder 321, so that air can be uniformly discharged from each aeration hole 3211.

[0031] In some preferred embodiments, the aeration cylinder 321 is vertically disposed in the first tank body 310 so that the air guided by the aeration cylinder 321 can penetrate into the sewage in the first tank body 310, so that the air and the sewage are fully in contact.

[0032] In some preferred embodiments, the air flotation member 330 includes a plurality of nozzles 331 and a second air supply pipe 332 . The plurality of nozzles 331 are arranged at the bottom of the first pool body 310 . The second air supply pipe 332 is connected to the plurality of nozzles 331 to supply air to the nozzles 331 .

[0033] In the above embodiment, when the first tank body 310 needs to be desilted, the second air supply pipe 332 can be used to supply air to each nozzle 331, and the air flow derived from the nozzle 331 can lift the silt so that the silt is mixed with the sewage, so that the sewage can carry the silt and be discharged from the first tank body 310. After the desilting of the first tank body 310 is completed, the second air supply pipe 332 can be used to supply air to each nozzle 331.

[0034] On the basis of the above embodiments, in some preferred embodiments, the nozzle 331 includes a connecting seat 3311 and a nozzle 3312. The connecting seat 3311 is installed on the second air supply pipe 332. The nozzle 3312 is rotatably installed on the connecting seat 3311 and connected to the second air supply pipe 332. A plurality of air flotation holes 33121 are opened on the periphery of the nozzle 3312. The airflow derived from the air flotation holes 33121 can push the nozzle 3312 to rotate relative to the connecting seat 3311.

[0035] In the above embodiment, the second air supply pipe 332 supplies air to the nozzle 3312 , and the air flow is discharged through the air flotation hole 33121 . The nozzle 3312 rotates under the push of the air flow, so that the air flow discharged from the nozzle 3312 can sweep the sludge around the first pool body 310 in all directions.

[0036] In some preferred embodiments, a plurality of receiving grooves 311 are opened at the bottom of the first pool body 310 , and a plurality of nozzles 3312 are embedded in the plurality of receiving grooves 311 in a one-to-one correspondence.

[0037] In some preferred embodiments, the connecting seat 3311 is detachably connected to the second air supply pipe 332 so that the nozzle 3312 can be regularly removed and cleaned to prevent the nozzle 3312 from being blocked by silt.

[0038] In some preferred embodiments, a dredging port 312 is provided at the bottom of the first tank body 310, and a dredging valve 313 is also installed at the dredging port 312, and the dredging valve 313 controls the opening and closing of the dredging port 312. When the sludge in the first tank body 310 is lifted by the air flotation element 330, the sludge is mixed with the sewage. At this time, the dredging valve 313 can be opened to discharge the sewage and the sludge from the dredging port 312 together.

[0039] In some preferred embodiments, a filter grid 110 is installed between the sedimentation tank 100 and the anaerobic tank 200 . Under the filtering effect of the filter grid 110 , solid impurities in the sedimentation tank 100 can be prevented from mixing into the anaerobic tank 200 .

[0040] The sedimentation tank 100 is used to precipitate solid impurities in the sewage, and then the sewage can be anaerobically fermented by means of the anaerobic tank 200. The sewage after anaerobically fermentation is introduced into the first tank body 310. As the aeration element 320 continuously introduces air into the tank body, the sewage in the first tank body 310 can be aerobically fermented. When the aeration tank 300 needs to be desilted, the second air supply pipe 332 supplies air to the nozzle 3312, and the air flow is guided out through the air flotation hole 33121. The nozzle 3312 rotates under the impetus of the air flow, so that the air flow guided out by the nozzle 3312 can sweep the sludge around the first tank body 310 in all directions, so that the sludge is spread in the water, so that the sewage and the sludge are discharged from the desilting port 312 together. Since the sewage is precipitated in the sedimentation tank 100 in advance, the total amount of sludge in the first tank body 310 is relatively small. The technical solution of the utility model uses flotation to dredge the aeration tank 300. Compared with the traditional mechanical dredging method, the flotation dredging method is more efficient.

[0041] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A sewage treatment system, characterized in that: It includes: Sedimentation tanks, which are used to precipitate solid impurities in sewage; An anaerobic tank receives the sewage from the sedimentation tank and performs anaerobic fermentation on the sewage; as well as The aeration tank comprises a first tank body, an aeration element and an air flotation element. The first tank body receives sewage discharged from the anaerobic tank. The aeration element introduces air into the first tank body. The air flotation element is installed at the bottom of the first tank body and has a first state of outputting air flow and raising sludge, and a second state of stopping outputting air flow.

2. The sewage treatment system according to claim 1, characterized in that: The aeration element includes a plurality of aeration cylinders and a first air supply pipe. The plurality of aeration cylinders are arranged in the first tank body, and a plurality of aeration holes are opened on the outer circumference of the aeration cylinders. The first air supply pipe connects the plurality of aeration cylinders to introduce air into the aeration cylinders.

3. The sewage treatment system according to claim 2, characterized in that: The first air supply pipe includes a main pipe and a plurality of branch pipes corresponding to the aeration cylinders one by one, one end of the branch pipe is connected to the main pipe, and the other end thereof is connected to the aeration cylinder.

4. The sewage treatment system according to claim 3, characterized in that: The aeration cylinder is vertically arranged in the first tank body.

5. The sewage treatment system according to claim 1, characterized in that: The air flotation component includes a plurality of nozzles and a second air supply pipe, wherein the plurality of nozzles are arranged at the bottom of the first pool body, and the second air supply pipe is connected to the plurality of nozzles to supply air to the nozzles.

6. The sewage treatment system according to claim 5, characterized in that: The nozzle includes a connecting seat and a nozzle, the connecting seat is installed on the second air supply pipe, the nozzle is rotatably installed on the connecting seat and connected to the second air supply pipe, and a plurality of air flotation holes are opened on the periphery of the nozzle, and the airflow derived from the air flotation holes can push the nozzle to rotate relative to the connecting seat.

7. The sewage treatment system according to claim 6, characterized in that: A plurality of receiving grooves are provided at the bottom end of the first pool body, and a plurality of the nozzles are embedded in the plurality of the receiving grooves in a one-to-one correspondence.

8. The sewage treatment system according to claim 6, characterized in that: The connecting seat is detachably connected to the second air supply pipe.

9. The sewage treatment system according to claim 1, characterized in that: A dredging port is provided at the bottom end of the first tank body, and a dredging valve is also installed at the dredging port, and the dredging valve controls the opening and closing of the dredging port.

10. The sewage treatment system according to claim 1, characterized in that: A filter grid is installed between the sedimentation tank and the anaerobic tank.

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