Efficient integrated treatment device for town sewage

Abstract

The utility model discloses an efficient integrated town sewage treatment device which comprises an adjusting tank, an AAO (anaerobic-anoxic-oxic) sewage treatment mechanism is arranged at the rear end of the adjusting tank, and a sedimentation tank is arranged at the rear end of the AAO sewage treatment mechanism; the pre-denitration tank is arranged at the front end of the AAO sewage treatment mechanism, an anaerobic tank is arranged at the rear end of the pre-denitration tank, an anoxic tank is arranged at the rear end of the anaerobic tank, an aerobic tank is arranged at the rear end of the anoxic tank, and conveying pipes are arranged among the adjacent pre-denitration tank, anaerobic tank, anoxic tank and aerobic tank; a first suction pump is mounted outside the conveying pipe; the aeration header pipe is arranged on one side of the AAO sewage treatment mechanism, an air blower is installed at one end of the aeration header pipe, and a first aeration branch pipe and a second aeration branch pipe are arranged at the air outlet end of the aeration header pipe respectively. And pollutants such as nitrogen and phosphorus in water are difficult to effectively remove.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a highly efficient integrated treatment device for urban sewage. Background Art

[0002] A sewage treatment plant is a facility that treats wastewater containing organic matter, inorganic matter, impurities, etc. Its main function is to convert wastewater into reusable water resources through filtration, separation, chemical reaction and other process flows to reduce pollution emissions, improve environmental quality, and protect the ecological environment. Sewage treatment plants can effectively treat wastewater, reduce the content of harmful substances in it, and reduce the emission of pollutants, thereby reducing the pollution pressure on the environment.

[0003] For example, the Chinese authorized patent "High-efficiency and Low-consumption Integrated Treatment Device for Urban Sewage" with announcement number CN212396106U includes a support mechanism, a first cleaning mechanism for filtering solid waste, a second cleaning mechanism, a filter barrel for filtering sewage, an extrusion mechanism, and a transmission mechanism for converting water potential energy into kinetic energy. The first cleaning mechanism, the second cleaning mechanism, and the extrusion mechanism are arranged on the inner side of the support mechanism. The utility model utilizes the first cleaning mechanism and the second cleaning mechanism to filter the particles in the wastewater in sections, effectively collects the solid particles, and utilizes the filter barrel and the extrusion mechanism to purify the wastewater that has been filtered of the solid particles, thereby ensuring the cleanliness of the discharged water.

[0004] Although the above-mentioned existing technologies can achieve the treatment of urban sewage, due to the relatively simple treatment structure, it is difficult to effectively remove pollutants such as nitrogen and phosphorus in the water, thereby affecting the water treatment quality. Therefore, it does not meet the existing needs. In this regard, we propose an efficient integrated treatment device for urban sewage. Utility Model Content

[0005] The utility model aims to provide an efficient integrated treatment device for urban sewage, so as to solve the problem that the sewage device proposed in the above background technology is difficult to effectively remove pollutants such as nitrogen and phosphorus in water due to its relatively simple treatment structure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a highly efficient integrated treatment device for urban sewage, comprising a regulating tank, an AAO sewage treatment mechanism is arranged at the rear end of the regulating tank, and a sedimentation tank is arranged at the rear end of the AAO sewage treatment mechanism; and further comprising:

[0007] A pre-denitrification tank is arranged at the front end of the AAO sewage treatment mechanism, an anaerobic tank is arranged at the rear end of the pre-denitrification tank, an anoxic tank is arranged at the rear end of the anaerobic tank, an aerobic tank is arranged at the rear end of the anoxic tank, and a delivery pipe is arranged between the adjacent pre-denitrification tank, the anaerobic tank, the anoxic tank and the aerobic tank, and a first pump is installed outside the delivery pipe;

[0008] An aeration main pipe is arranged on one side of the AAO sewage treatment mechanism, a blower is installed at one end of the aeration main pipe, and the blower is fixed to the AAO sewage treatment mechanism, a first aeration branch pipe and a second aeration branch pipe are respectively arranged at the air outlet end of the aeration main pipe, the first aeration branch pipe is located inside the regulating tank, and the second aeration branch pipe is located inside the aerobic tank.

[0009] Preferably, stirring motors are fixedly mounted on both sides of the upper end surface of the regulating tank, a stirring shaft is mounted on the output shaft of the stirring motor, and the stirring shaft is located inside the regulating tank, and a stirring blade is fixedly mounted on the outside of the stirring shaft.

[0010] Preferably, a filter tank is provided at the rear end of the sedimentation tank, a transmission roller is rotatably installed inside the filter tank, a plurality of equally spaced wheel discs are provided outside the transmission roller, and at least six filter screens distributed in a fan-shaped ring are provided inside the wheel disc.

[0011] Preferably, a reduction motor is fixedly mounted on the upper end surface of the filter tank, a transmission mechanism is provided at the rear end of the reduction motor, a transmission wheel fixed to the output shaft of the reduction motor is installed inside the transmission mechanism, and the transmission wheel is connected to one end of the transmission roller through a chain belt.

[0012] Preferably, a disinfection tank is provided at the rear end of the filter tank, a drug adding port is provided at the upper end of the disinfection tank, a drain pipe is provided below the rear end of the disinfection tank, and an ultraviolet disinfection lamp is installed at the top of the inner cavity of the disinfection tank.

[0013] Preferably, the regulating tank and the pre-denitrification tank, the aerobic tank, the sedimentation tank, the filter tank and the disinfection tank are all connected via connecting pipes, and a second pump is provided outside the connecting pipes.

[0014] Preferably, the delivery pipe connecting the anoxic pool and the aerobic pool is switched between delivery and reflux conditions.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model adopts the AAO sewage treatment process, and is equipped with a pre-denitrification tank, an anaerobic tank, an anoxic tank and an aerobic tank. Through the three-stage biological treatment of anaerobic, anoxic and aerobic, efficient removal of nitrogen and phosphorus is achieved. In the anaerobic stage, polyphosphate bacteria release phosphorus; in the anoxic stage, denitrifying bacteria convert nitrates into nitrogen gas to achieve denitrification; in the aerobic stage, polyphosphate bacteria absorb phosphorus in excess and remove phosphorus through the discharge of residual sludge, which can significantly reduce the nitrogen and phosphorus content in the effluent and alleviate the problem of eutrophication of water bodies. The anoxic tank and the aerobic tank can utilize each other's products to achieve efficient energy utilization. For example, the denitrification reaction in the anoxic tank can utilize the nitrates produced in the aerobic tank, while the nitrification reaction in the aerobic tank can utilize the organic carbon source produced in the anoxic tank. This energy utilization method reduces energy consumption during the treatment process and improves overall energy efficiency.

[0017] 2. The utility model is provided with a regulating tank, and a stirring mechanism and an aeration mechanism are arranged inside the regulating tank. The rotation of the stirring blades makes the substances in the sewage fully mixed, which is helpful to achieve the uniformity of water quality and provide stable water inlet conditions for subsequent treatment processes. Through stirring, the suspended matter in the sewage can be prevented from settling in the regulating tank, and the stability of the water quality in the tank can be maintained. The setting of the aeration mechanism can increase the dissolved oxygen in the regulating tank, provide sufficient oxygen for the microorganisms in the water, promote the biological reaction, and help the growth and reproduction of aerobic microorganisms, thereby improving the effect of biological treatment, and then helping to remove the odor and pigment in the sewage and improve the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a top view of the internal structure of the regulating tank of the utility model;

[0021] Figure 4 It is a schematic diagram of the roulette structure of the utility model.

[0022] In the figure: 1. regulating tank; 2. pre-denitrification tank; 3. anaerobic tank; 4. anoxic tank; 5. aerobic tank; 6. sedimentation tank; 7. filter tank; 8. disinfection tank; 9. drain pipe; 10. aeration main pipe; 11. delivery pipe; 12. first pump; 13. reduction motor; 14. transmission mechanism; 15. dosing port; 16. stirring motor; 17. stirring shaft; 18. stirring blade; 19. first aeration branch pipe; 20. second aeration branch pipe; 21. connecting pipe; 22. second pump; 23. transmission roller; 24. wheel; 25. chain belt; 26. filter screen. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-4 The utility model provides an embodiment: a highly efficient integrated urban sewage treatment device, comprising a regulating tank 1, an AAO sewage treatment mechanism is arranged at the rear end of the regulating tank 1, and a sedimentation tank 6 is arranged at the rear end of the AAO sewage treatment mechanism; and further comprising:

[0025] A pre-denitrification tank 2 is arranged at the front end of the AAO sewage treatment mechanism, an anaerobic tank 3 is arranged at the rear end of the pre-denitrification tank 2, an anoxic tank 4 is arranged at the rear end of the anaerobic tank 3, an aerobic tank 5 is arranged at the rear end of the anoxic tank 4, a delivery pipe 11 is arranged between the adjacent pre-denitrification tank 2, the anaerobic tank 3, the anoxic tank 4 and the aerobic tank 5, and a first pump 12 is installed outside the delivery pipe 11;

[0026] The aeration main pipe 10 is arranged on one side of the AAO sewage treatment mechanism. A blower is installed at one end of the aeration main pipe 10, and the blower is fixed to the AAO sewage treatment mechanism. The air outlet end of the aeration main pipe 10 is respectively provided with a first aeration branch pipe 19 and a second aeration branch pipe 20. The first aeration branch pipe 19 is located inside the regulating tank 1, and the second aeration branch pipe 20 is located inside the aerobic tank 5.

[0027] The sewage first enters the pre-denitrification tank 2, where the sludge and sewage are mixed under anoxic conditions. Under anoxic conditions, nitrates and oxygen are fully removed, and the anaerobic phosphorus release process of polyphosphate bacteria is strengthened. The sewage passing through the pre-denitrification tank enters the anaerobic tank. In the anaerobic tank 3, the sewage is in a state of no molecular oxygen and no nitrate nitrogen. Facultative anaerobic bacteria convert biodegradable organic matter in the sewage into volatile fatty acids, and polyphosphate bacteria release phosphorus and absorb easily degradable organic matter such as low-level fatty acids. After entering the anoxic tank 4, denitrifying bacteria convert the nitrate brought in by the internal reflux into nitrogen gas through biological denitrification and escape into the atmosphere, thereby achieving the purpose of denitrification. Finally, it enters the aerobic tank 5, and nitrifying bacteria convert ammonia nitrogen in the sewage and ammonia nitrogen formed by ammoniation of organic nitrogen into nitrates through biological nitrification. At the same time, polyphosphate bacteria absorb phosphorus in excess and remove phosphorus through the discharge of residual sludge.

[0028] See also Figure 2 and Figure 3A stirring motor 16 is fixedly installed on both sides of the upper end surface of the regulating tank 1, and a stirring shaft 17 is installed on the output shaft of the stirring motor 16, and the stirring shaft 17 is located inside the regulating tank 1. A stirring blade 18 is fixedly installed outside the stirring shaft 17, which helps to achieve uniformity of water quality and provide stable water inlet conditions for subsequent treatment processes. Through stirring, suspended matter in sewage can be prevented from settling in the regulating tank, thereby maintaining the stability of water quality in the tank.

[0029] See also Figure 1 . Figure 2 and Figure 4 A filter tank 7 is provided at the rear end of the sedimentation tank 6, and a transmission roller 23 is rotatably installed inside the filter tank 7. A plurality of evenly spaced wheel discs 24 are provided outside the transmission roller 23. At least six filter screens 26 distributed in a fan-shaped ring are provided inside the wheel disc 24, which can effectively filter impurities and suspended matter in the water and improve the effluent water quality.

[0030] See also Figure 2 A reduction motor 13 is fixedly mounted on the upper end surface of the filter tank 7, and a transmission mechanism 14 is provided at the rear end of the reduction motor 13. A transmission wheel fixed to the output shaft of the reduction motor 13 is installed inside the transmission mechanism 14, and the transmission wheel is connected to one end of the transmission roller 23 through a chain belt 25 to realize the rotation of the wheel disc 24 to achieve efficient filtration.

[0031] See also Figure 2 The rear end of the filter tank 7 is provided with a disinfection tank 8, the upper end of the disinfection tank 8 is provided with a dosing port 15, a drain pipe 9 is provided below the rear end of the disinfection tank 8, and an ultraviolet disinfection lamp is installed at the top of the inner cavity of the disinfection tank 8. Disinfectants (such as chlorides, ozone, etc.) are added to the disinfection tank 8 through the dosing port 15 to react with organic matter and microorganisms in the water to kill or inhibit their activity. The ultraviolet disinfection lamp further kills pathogens in the water. Ultraviolet rays can destroy the DNA structure of microorganisms, prevent their reproduction and growth, and thus achieve the effect of disinfection.

[0032] Working principle: After the sewage is collected by the drainage system, it enters the grid well of the sewage treatment station. After removing the particulate debris, it enters the regulating tank 1 for homogenization and equalization. A pre-aeration system is set in the regulating tank. After adjustment, the wastewater enters the pre-denitrification tank 2 for acidification, hydrolysis, nitrification and denitrification to reduce the concentration of organic matter and remove part of the ammonia nitrogen. Then it flows into the O-level biological contact oxidation tank for aerobic biochemical reaction. In this, most of the organic pollutants are degraded by biological oxidation and adsorption. After treatment, it enters the sedimentation tank 6 for solid-liquid separation and then enters the filter tank 7. By turning on the reduction motor 13, the transmission wheel inside the transmission mechanism 14 is driven to rotate, thereby driving the transmission roller 23 to rotate under the drive of the chain belt 25, realizing the rotation of the external wheel disc 24. The water forms a thin film on the filter screen 26 of the wheel disc 24. At the same time, it is affected by the centrifugal force, so that the particulate matter in the water is intercepted by the filter screen 26. The clean water after filtration passes through the filter screen and enters the disinfection tank 8. After the addition of chlorine tablets, it is contacted and dissolved to kill harmful bacteria in the water and then discharged out of the standard.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A highly efficient integrated urban sewage treatment device, comprising a regulating tank (1), an AAO sewage treatment mechanism being arranged at the rear end of the regulating tank (1), and a sedimentation tank (6) being arranged at the rear end of the AAO sewage treatment mechanism; Features: Also includes: A pre-denitrification tank (2) is arranged at the front end of the AAO sewage treatment mechanism, an anaerobic tank (3) is arranged at the rear end of the pre-denitrification tank (2), an anoxic tank (4) is arranged at the rear end of the anaerobic tank (3), an aerobic tank (5) is arranged at the rear end of the anoxic tank (4), and a delivery pipe (11) is arranged between the adjacent pre-denitrification tank (2), the anaerobic tank (3), the anoxic tank (4) and the aerobic tank (5), and a first pump (12) is installed outside the delivery pipe (11); An aeration main pipe (10) is arranged on one side of the AAO sewage treatment mechanism, a blower is installed at one end of the aeration main pipe (10), and the blower is fixed to the AAO sewage treatment mechanism, and a first aeration branch pipe (19) and a second aeration branch pipe (20) are respectively arranged at the air outlet end of the aeration main pipe (10), the first aeration branch pipe (19) is located inside the regulating tank (1), and the second aeration branch pipe (20) is located inside the aerobic tank (5).

2. The highly efficient integrated urban sewage treatment device according to claim 1, characterized in that: A stirring motor (16) is fixedly mounted on both sides of the upper end surface of the regulating tank (1); a stirring shaft (17) is mounted on the output shaft of the stirring motor (16); the stirring shaft (17) is located inside the regulating tank (1); and a stirring blade (18) is fixedly mounted on the outside of the stirring shaft (17).

3. The highly efficient integrated treatment device for urban sewage according to claim 1 is characterized in that: A filter tank (7) is arranged at the rear end of the sedimentation tank (6), a transmission roller (23) is rotatably installed inside the filter tank (7), a plurality of wheel discs (24) are arranged at equal intervals outside the transmission roller (23), and at least six filter screens (26) are arranged inside the wheel disc (24) in a fan-shaped annular distribution.

4. The highly efficient integrated treatment device for urban sewage according to claim 3 is characterized in that: A reduction motor (13) is fixedly mounted on the upper end surface of the filter tank (7), a transmission mechanism (14) is arranged at the rear end of the reduction motor (13), a transmission wheel fixed to the output shaft of the reduction motor (13) is arranged inside the transmission mechanism (14), and the transmission wheel is connected to one end of a transmission roller (23) via a chain belt (25).

5. The highly efficient integrated treatment device for urban sewage according to claim 3 is characterized in that: A disinfection tank (8) is arranged at the rear end of the filter tank (7), a drug adding port (15) is arranged at the upper end of the disinfection tank (8), a drainage pipe (9) is arranged below the rear end of the disinfection tank (8), and an ultraviolet disinfection lamp is installed at the top of the inner cavity of the disinfection tank (8).

6. The highly efficient integrated treatment device for urban sewage according to claim 5 is characterized in that: The regulating tank (1) and the pre-denitrification tank (2), the aerobic tank (5), the sedimentation tank (6), the filter tank (7) and the disinfection tank (8) are all connected via a connecting pipe (21), and a second pump (22) is provided outside the connecting pipe (21).

7. The highly efficient integrated treatment device for urban sewage according to claim 1 is characterized in that: The delivery pipe (11) used for connecting the anoxic pool (4) and the aerobic pool (5) is switched between delivery and reflux conditions.

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