Low-carbon energy-saving sewage treatment system

Abstract

The invention discloses a low-carbon energy-saving sewage treatment system, and belongs to the field of sewage treatment.The sewage treatment system comprises a sewage treatment tank, and an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and a disinfection tank are arranged in the sewage treatment tank in the sewage flowing direction; a grating plate for separating sludge from clear water is arranged in the sedimentation tank; a cleaning structure is arranged in the sedimentation tank and comprises a crankshaft rod, bearing plates which are arranged at the two ends of the crankshaft rod in a sleeving manner and are fixedly connected with the grating plate, reciprocating screw grooves which are symmetrically formed in the crankshaft rod, mounting seats which are symmetrically arranged on the crankshaft rod in a sleeving manner and are in reciprocating connection with the reciprocating screw grooves, and scraping plates which are arranged on the mounting seats; a driving motor for driving the crankshaft rod to rotate is fixedly arranged on the sewage treatment box. Through the design of the cleaning structure, automatic cleaning of sludge at the lower end of the grating plate is achieved, sludge blockage is avoided, and the sewage treatment efficiency and quality are improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and specifically to a low-carbon and energy-saving sewage treatment system. Background Art

[0002] The sewage treatment system is an important facility in the field of modern environmental protection. It aims to effectively remove harmful substances in sewage through a series of biochemical reaction processes to meet the standards of environmentally friendly discharge or reuse. The traditional sewage treatment process usually includes sewage passing through anaerobic tanks, anoxic tanks, aerobic tanks, and finally entering sedimentation tanks for treatment. As a key link in the sewage treatment process, the sedimentation tank's main function is to separate sludge from clean water through the grid plate. In this process, the sludge is deposited under the grid plate, while the clean water rises to the top through the holes on the grid plate, and then is introduced into the disinfection tank through the drain port for further disinfection.

[0003] However, in the long-term operation, the traditional sewage treatment system faces a significant problem: the lower end of the grid plate is prone to adsorb and accumulate sludge. This sludge gradually blocks the holes on the grid plate, resulting in a decrease in the efficiency of clean water passing through, and may even affect the normal operation of the entire sewage treatment system. This problem not only increases the difficulty and frequency of system maintenance, but also may reduce the efficiency and quality of sewage treatment, and have an adverse impact on environmental protection and resource reuse.

[0004] Therefore, the present application provides a low-carbon and energy-saving sewage treatment system to solve the above problems. Summary of the invention

[0005] The present application provides a low-carbon and energy-saving sewage treatment system, which aims to solve the problem that the lower end of the existing grid plate is prone to adsorb and accumulate sludge. The sludge gradually blocks the holes on the grid plate, resulting in a decrease in the efficiency of clean water passing through, and may even affect the normal operation of the entire sewage treatment system.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a low-carbon and energy-saving sewage treatment system, comprising a sewage treatment tank, wherein an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and a disinfection tank are respectively arranged inside the sewage treatment tank along the sewage flow direction; an intermittent pneumatic stirring structure is arranged inside the aerobic tank, a sludge return discharge structure is arranged inside the sedimentation tank; a grid plate for separating sludge from clean water is arranged inside the sedimentation tank;

[0007] In order to facilitate the cleaning of the lower end of the grid plate: the interior of the sedimentation tank is provided with a cleaning structure for scraping off the sludge adsorbed on the lower end of the grid plate, the cleaning structure includes a crank shaft, a bearing plate mounted on both ends of the crank shaft and fixedly connected to the grid plate, a reciprocating wire groove symmetrically arranged on the crank shaft, a mounting seat symmetrically mounted on the crank shaft and reciprocatingly connected to the reciprocating wire groove, and a scraper arranged on the mounting seat and in contact with the lower end of the grid plate, and a driving motor for driving the crank shaft to rotate is fixedly arranged on the sewage treatment tank; a photovoltaic panel connected to the driving motor is arranged on the sewage treatment tank. When cleaning the sludge on the lower end of the grid plate, the crank shaft is driven to rotate by the driving motor, and the crank shaft is reciprocatingly connected with the mounting seat through the reciprocating wire groove, and then the mounting seat drives the scraper to move back and forth under the action of the crank shaft, and the scraper scrapes off the sludge adsorbed on the lower end of the grid plate during the movement, so as to avoid the sludge blocking the grid plate and affecting the passage of clean water.

[0008] Preferably, in order to ensure the stability of the mounting seat: a guide rod is symmetrically fixedly connected between the two bearing plates, and the mounting seat is slidably sleeved on the guide rod.

[0009] Preferably, in order to facilitate the installation of the drive motor: a bracket for installing the drive motor is fixedly installed on the sewage treatment tank, the drive motor is fixedly installed on the drive motor by bolts, one end of the crank shaft rotates and penetrates one side of the sewage treatment tank, and the output end of the drive motor is fixedly connected to the end of the crank shaft. The design of the bracket makes the installation of the drive motor simpler and faster. There is no need to perform complicated positioning and fixing operations, and the drive motor only needs to be placed on the bracket and fixed with bolts.

[0010] Preferably, in order to facilitate the flow purification of sewage in the sewage treatment tank: one end of the sewage treatment tank is fixedly connected with an inlet pipe extending into the anaerobic tank, a first opening is provided at the bottom between the anaerobic tank and the anoxic tank, a second opening is provided at the top between the anoxic tank and the aerobic tank, a third opening is provided at the top between the aerobic tank and the sedimentation tank, a fourth opening is provided at the top between the sedimentation tank and the disinfection tank, and the other end of the sewage treatment tank is fixedly connected with an outlet pipe extending into the disinfection tank, and the third opening and the fourth opening are located above the grille plate. By designing the position and shape of the connecting ports between the various treatment tanks, it is ensured that the sewage can flow smoothly and efficiently between the various treatment tanks, thereby improving the overall treatment efficiency.

[0011] Preferably, in order to facilitate the pneumatic stirring while oxygenating the aerobic pool: the intermittent pneumatic stirring structure includes a perforated aeration pipe arranged in the aerobic pool, an air duct plugged into the sewage treatment tank and connected to the perforated aeration pipe, a first solenoid valve fixedly mounted on the air duct, and an aerator fixedly mounted on the sewage treatment tank and connected to the air duct, and the aerator is connected to the photovoltaic panel. By optimizing the intermittent pneumatic stirring structure and utilizing the control of the first solenoid valve, intermittent pneumatic stirring is performed to accelerate the denitrification reaction of microorganisms in the anoxic zone, thereby improving the sewage treatment efficiency.

[0012] Preferably, in order to facilitate the discharge of sewage in the aerobic tank to the bottom of the grid plate and collect it: a liquid guide tube corresponding to the third port is inserted through the grid plate, a conical sedimentation hopper is provided at the bottom of the sedimentation tank, the end of the liquid guide tube extends to the top of the conical sedimentation hopper, and the crankshaft is rotated and penetrates the liquid guide tube. The design of the conical sedimentation hopper makes full use of the effect of gravity, so that the suspended matter can be quickly deposited at the bottom of the hopper, thereby improving the sedimentation efficiency. The bottom of the conical sedimentation hopper is convenient for the collection and discharge of sludge, reducing the difficulty and cost of sludge treatment.

[0013] Preferably, the sludge return discharge structure includes a sludge return pump arranged inside the sedimentation tank and connected to the interior of the conical sedimentation hopper, and a sludge return pipe fixedly plugged into the sewage treatment tank and connected to the sludge return pump, the end of the sludge return pipe extends to the interior of the anaerobic tank, and a second solenoid valve is fixedly installed on the sludge return pipe.

[0014] Preferably, the sludge return discharge structure includes a sludge discharge pipe fixedly arranged on the sludge return pipe corresponding to between the sludge return pump and the second solenoid valve, and a third solenoid valve fixedly installed on the sludge discharge pipe. Through the flexible adjustment of the sludge return discharge structure, the sludge return path can be optimized according to different water quality and treatment requirements, and the efficiency and effect of biological treatment can be improved. At the same time, it is convenient to discharge the sludge in the conical sedimentation hopper.

[0015] Preferably, in order to ensure that the scraper always keeps in contact with the grille plate: a fastener is provided on the mounting seat, and the fastener includes a lifting rod slidably inserted on the mounting seat and fixedly connected to the lower end of the scraper, a baffle fixedly connected to the lower end of the lifting rod, and a spring sleeved on the lifting rod corresponding to the mounting seat and the scraper. When in use, the elastic force of the spring can exert a pushing force on the scraper to ensure that the upper end of the scraper always keeps in contact with the lower end of the grille plate.

[0016] Preferably, in order to facilitate the clean water on the grid plate to have a downward impact force, it can impact downward the sludge in the holes on the grid plate, and further prevent the grid plate from being blocked: the sedimentation tank is also provided with an agitation structure inside, the agitation structure includes an agitation grid plate arranged at the upper end of the grid plate, a connecting rod symmetrically slidingly inserted through the grid plate and fixedly connected to the lower end of the agitation grid plate, a crank rod inserted through the liquid guide tube and fixedly connected to the connecting rod, a vertical groove provided on the liquid guide tube for the crank rod to move up and down, a cam fixedly sleeved on the crank shaft, a track guide groove provided on the cam, and a fixed rod slidingly arranged in the track guide groove and fixedly connected to the crank rod, wherein the upper end of the agitation grid plate is pointed. The pointed agitation grid plate can reduce the resistance of the agitation grid plate to rise; the design of the agitation structure can make the clean water on the grid plate have a downward impact force, and then the sewage blocked in the holes on the grid plate can be discharged downward from the grid plate, thereby improving the efficiency of the separation of sludge and clean water on the grid plate.

[0017] The present application can clean the sludge at the lower end of the grid plate through the design of the cleaning structure, and can prevent the sludge from blocking the lower end of the grid plate through the reciprocating scraper, thereby ensuring the cleanliness of the lower end of the grid plate and avoiding the blockage of the lower end of the grid plate that affects the passage of clean water. The combination of photovoltaic panels and drive motors provides green and sustainable energy for the system, improving its environmental performance.

[0018] The present application can reduce the resistance of the rising agitation grid through the pointed-angled agitation grid; through the design of the agitation structure, the clean water on the grid plate can have a downward impact force, and then the sewage blocked in the holes of the grid plate can be discharged downward onto the grid plate, thereby improving the efficiency of separating sludge and clean water on the grid plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a low-carbon and energy-saving sewage treatment system;

[0020] Figure 2 for Figure 1 Schematic diagram of the other side of the structure;

[0021] Figure 3 for Figure 1 The main cross-sectional view of the structure;

[0022] Figure 4 It is a schematic diagram of the structure of the cleaning structure and fasteners;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the cleaning mechanism and the fasteners;

[0024] Figure 6 It is a structural schematic diagram of the connection between the crank shaft and the exciting structure.

[0025] In the figure:

[0026] 1. Sewage treatment tank; 11. Anaerobic tank; 111. First port; 12. Anoxic tank; 121. Second port; 13. Aerobic tank; 131. Third port; 14. Sedimentation tank; 141. Grid plate; 142. Liquid guide tube; 143. Conical sedimentation hopper; 144. Fourth port; 15. Disinfection tank; 16. Water inlet pipe; 17. Water outlet pipe; 2. Intermittent pneumatic stirring structure; 21. Perforated aeration pipe; 22. Air guide pipe; 23. First solenoid valve; 24. Aerator; 3. Sludge return discharge structure; 31. Sludge return pump; 32 , sludge return pipe; 33, second solenoid valve; 34, sludge discharge pipe; 35, third solenoid valve; 4, cleaning structure; 41, crank shaft; 42, bearing plate; 43, reciprocating wire groove; 44, mounting seat; 441, guide rod; 45, scraper; 46, drive motor; 461, bracket; 5, fastener; 51, lifting rod; 52, baffle; 53, spring; 6, agitation structure; 61, agitation grid; 62, connecting rod; 63, crank rod; 64, vertical groove; 65, cam; 66, track guide groove; 67, fixing rod; 7, photovoltaic panel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Example 1

[0029] This embodiment provides a low-carbon and energy-saving sewage treatment system. Figure 1-6 As shown, the sewage treatment system includes a sewage treatment tank 1, wherein an anaerobic tank 11, an anoxic tank 12, an aerobic tank 13, a sedimentation tank 14 and a disinfection tank 15 are respectively arranged inside the sewage treatment tank 1 along the sewage flow direction; an intermittent pneumatic stirring structure 2 is arranged inside the aerobic tank 13, and a sludge return discharge structure 3 is arranged inside the sedimentation tank 14; and a grid plate 141 for separating sludge from clean water is arranged inside the sedimentation tank 14;

[0030] In order to facilitate the cleaning of the lower end of the grille plate 141: a cleaning structure 4 for scraping off the sludge adsorbed on the lower end of the grille plate 141 is arranged inside the sedimentation tank 14, and the cleaning structure 4 includes a crank shaft 41, a bearing plate 42 which is sleeved on both ends of the crank shaft 41 and fixedly connected to the grille plate 141, a reciprocating wire groove 43 symmetrically opened on the crank shaft 41, a mounting seat 44 which is symmetrically sleeved on the crank shaft 41 and reciprocatingly connected to the reciprocating wire groove 43, and a scraper 45 which is arranged on the mounting seat 44 and contacts the lower end of the grille plate 141, and a driving motor 46 for driving the crank shaft 41 to rotate is fixedly arranged on the sewage treatment tank 1; a photovoltaic panel 7 connected to the driving motor 46 is arranged on the sewage treatment tank 1. The design of the cleaning structure 4 can clean the sludge at the lower end of the grid plate 141, and the reciprocating scraper 45 can prevent the sludge from clogging the lower end of the grid plate 141, thereby ensuring the cleanliness of the lower end of the grid plate 141 and preventing the lower end of the grid plate 141 from being blocked and affecting the passage of clean water. The combined use of the photovoltaic panel and the drive motor 46 provides a green and sustainable energy source for the system and improves its environmental performance. When cleaning the sludge on the lower end of the grid plate 141, the drive motor 46 drives the crankshaft 41 to rotate, and the crankshaft 41 is reciprocatingly connected with the mounting seat 44 through the reciprocating wire groove 43, and then the mounting seat 44 drives the scraper 45 to reciprocate under the action of the crankshaft 41. The scraper 45 scrapes the sludge adsorbed on the lower end of the grid plate 141 during the movement, thereby preventing the sludge from clogging the grid plate 141 and affecting the passage of clean water.

[0031] Specifically, in order to ensure the stability of the mounting seat 44 , a guide rod 441 is symmetrically fixedly connected between the two bearing plates 42 , and the mounting seat 44 is slidably sleeved on the guide rod 441 .

[0032] Specifically, in order to facilitate the installation of the drive motor 46: a bracket 461 for installing the drive motor 46 is fixedly installed on the sewage treatment tank 1, and the drive motor 46 is fixedly installed on the drive motor 46 by bolts. One end of the crank shaft 41 rotates and penetrates one side of the sewage treatment tank 1, and the output end of the drive motor 46 is fixedly connected to the end of the crank shaft 41. Among them, the crank shaft 41 is sealed and connected to the sewage treatment tank 1 through a shaft seal. The design of the bracket 461 makes the installation of the drive motor 46 simpler and faster. There is no need to perform complicated positioning and fixing operations, just place the drive motor 46 on the bracket 461 and fix it with bolts. The bolt connection between the bracket 461 and the drive motor 46 makes maintenance more convenient. When the drive motor 46 needs to be replaced or repaired, it can be easily removed by removing the bolts without disassembling the entire device. This greatly reduces the difficulty and cost of maintenance.

[0033] In order to facilitate the flow purification of sewage in the sewage treatment tank 1: one end of the sewage treatment tank 1 is fixedly connected with an inlet pipe 16 extending into the anaerobic tank 11, a first opening 111 is provided at the bottom between the anaerobic tank 11 and the anoxic tank 12, a second opening 121 is provided at the top between the anoxic tank 12 and the aerobic tank 13, a third opening 131 is provided at the top between the aerobic tank 13 and the sedimentation tank 14, a fourth opening 144 is provided at the top between the sedimentation tank 14 and the disinfection tank 15, and the other end of the sewage treatment tank 1 is fixedly connected with an outlet pipe 17 extending into the disinfection tank 15, and the third opening 131 and the fourth opening 144 are located above the grid plate 141. By designing the position and shape of the connecting ports between the various treatment tanks, it is ensured that the sewage can flow smoothly and efficiently between the various treatment tanks, thereby improving the overall treatment efficiency. The connecting ports are set at appropriate positions to effectively avoid the phenomenon of sludge and sediment mixing between different treatment tanks, and maintain the treatment effect of each treatment tank. Specifically, at the same time, the polyphosphate microorganisms in the sewage absorb organic matter and release phosphorus in the anaerobic tank 11. A first opening 111 is opened at the top between the anaerobic tank 11 and the anoxic tank 12, allowing the sewage after anaerobic treatment to flow smoothly into the anoxic tank 12 for denitrification reaction. A second opening 121 is opened at the top between the anoxic tank 12 and the aerobic tank 13, so that the sewage after anoxic treatment can flow smoothly into the aerobic tank 13, so that the microorganisms degrade organic matter and perform nitrification reaction in the aerobic zone. A third opening 131 is opened at the top between the aerobic tank 13 and the sedimentation tank 14. Ensure that the sewage after the microorganisms degrade organic matter and perform nitrification reaction in the aerobic zone can flow smoothly into the sedimentation tank 14 for solid-liquid separation. The sludge and sediment in the sedimentation tank 14 will be deposited at the bottom, while the clean water will move to the sedimentation tank 14 through the grid plate 141 and finally flow into the disinfection tank 15 through the outlet. Finally, a fourth opening 144 is opened at the top between the sedimentation tank 14 and the disinfection tank 15. The clean water after the sedimentation treatment flows into the disinfection tank 15 through this opening for final disinfection treatment. The disinfected clean water is discharged through the outlet pipe 17 at the other end of the sewage treatment tank 1 for subsequent use. The whole treatment process is efficient and stable, ensuring the high quality of the effluent water.

[0034] In order to facilitate the oxygenation of the aerobic pool 13 and realize pneumatic stirring at the same time: the intermittent pneumatic stirring structure 2 includes a perforated aeration pipe 21 arranged in the aerobic pool 13, an air guide pipe 22 plugged into the sewage treatment tank 1 and connected to the perforated aeration pipe 21, a first solenoid valve 23 fixedly mounted on the air guide pipe 22, and an aerator 24 fixedly mounted on the sewage treatment tank 1 and connected to the air guide pipe 22, and the aerator 24 is connected to the photovoltaic panel 7. By optimizing the intermittent pneumatic stirring structure 2, intermittent pneumatic stirring is performed by controlling the first solenoid valve 23 to accelerate the denitrification reaction of microorganisms in the anoxic zone, thereby improving the sewage treatment efficiency. When the aerator 24 is started, it generates a stable airflow, which is transmitted to the perforated aeration pipe 21 through the air guide pipe 22, and is ejected through the perforated aeration pipe 21 to release the airflow into the sewage in the form of tiny bubbles. These bubbles form a tiny upwelling in the sewage, which not only increases the dissolved oxygen content in the sewage, but also promotes the contact and mixing between the sewage and the microorganisms, thereby accelerating the denitrification reaction of the microorganisms in the anoxic zone.

[0035] In order to facilitate the discharge and collection of sewage in the aerobic tank 13 to the bottom of the grid plate 141: a liquid guide tube 142 corresponding to the third port 131 is inserted through the grid plate 141, and a conical sedimentation hopper 143 is provided at the bottom of the sedimentation tank 14. The end of the liquid guide tube 142 extends to the top of the conical sedimentation hopper 143, and the crank shaft 41 rotates and penetrates the liquid guide tube 142. The design of the conical sedimentation hopper 143 makes full use of the effect of gravity, so that suspended matter can be quickly deposited at the bottom of the hopper, thereby improving the sedimentation efficiency. The grid plate 141 effectively blocks large pieces of suspended matter or floating matter to achieve the separation of sludge and clean water, ensuring the clarity and quality of the supernatant. The bottom of the conical sedimentation hopper 143 facilitates the collection and discharge of sludge, reducing the difficulty and cost of sludge treatment.

[0036] The sludge return discharge structure 3 includes a sludge return pump 31 arranged inside the sedimentation tank 14 and connected to the inside of the conical sedimentation hopper 143, and a sludge return pipe 32 fixedly plugged into the sewage treatment tank 1 and connected to the sludge return pump 31. The end of the sludge return pipe 32 extends to the inside of the anaerobic tank 11, and a second solenoid valve 33 is fixedly installed on the sludge return pipe 32.

[0037] The sludge return discharge structure 3 includes a sludge discharge pipe 34 fixedly arranged on the sludge return pipe 32 corresponding to the sludge return pump 31 and the second solenoid valve 33, and a third solenoid valve 35 fixedly installed on the sludge discharge pipe 34. Through the flexible adjustment of the sludge return discharge structure 3, the sludge return path can be optimized according to different water quality and treatment requirements, and the efficiency and effect of biological treatment can be improved. At the same time, it is convenient to discharge the sludge in the conical sedimentation hopper 143. When it is necessary to return the sludge to the anaerobic tank 11, the second solenoid valve 33 is opened, the third solenoid valve 35 is closed, and the sludge in the conical sedimentation hopper 143 of the sludge return pump 31 is transported to the anaerobic tank 11 through the sludge return pipe 32. During the sludge return process, if it is necessary to discharge excess sludge or clean the equipment, the third solenoid valve 35 can be opened to discharge the sludge from the equipment through the sludge discharge pipe 34.

[0038] Example 2

[0039] In order to ensure that the scraper 45 always keeps in contact with the grid plate 141: the mounting seat 44 is provided with a fastener 5, which includes a lifting rod 51 that is slidably inserted on the mounting seat 44 and fixedly connected to the lower end of the scraper 45, a baffle 52 that is fixedly connected to the lower end of the lifting rod 51, and a spring 53 that is sleeved on the lifting rod 51 and corresponds to the mounting seat 44 and the scraper 45. When in use, the elastic force of the spring 53 can exert a driving force on the scraper 45 to ensure that the upper end of the scraper 45 always keeps in contact with the lower end of the grid plate 141; the lifting rod 51 can ensure that the scraper 45 always keeps moving up and down at the upper end of the mounting seat 44, and the lifting rod 51 can prevent the spring 53 from being deformed by force.

[0040] Example 3

[0041] In order to facilitate the clean water on the grid plate 141 to have a downward impact force, so as to be able to impact downward the sludge in the holes on the grid plate 141, and further prevent the grid plate 141 from being blocked: the sedimentation tank 14 is also provided with an agitation structure 6 inside, the agitation structure 6 includes an agitation grid plate 61 arranged at the upper end of the grid plate 141, a connecting rod 62 symmetrically slidingly inserted through the grid plate 141 and fixedly connected to the lower end of the agitation grid plate 61, a crank rod 63 inserted through the liquid guide tube 142 and fixedly connected to the connecting rod 62, a vertical groove 64 provided on the liquid guide tube 142 for the crank rod 63 to move up and down, a cam 65 fixedly mounted on the crank shaft 41, a track guide groove 66 provided on the cam 65, and a fixing rod 67 slidably arranged in the track guide groove 66 and fixedly connected to the crank rod 63, wherein the upper end of the agitation grid plate 61 is pointed. The sharp-angled agitation grid 61 can reduce the resistance of the agitation grid 61 to rise; the design of the agitation structure 6 can make the clean water on the grid plate 141 have a downward impact force, and then the sewage blocked in the holes on the grid plate 141 can be discharged downward to the grid plate 141, thereby improving the efficiency of the separation of sludge and clean water on the grid plate 141. When in use, the cam 65 is driven to rotate by driving the crank shaft 41, and the cam 65 drives the crank rod 63 to move up and down along the inside of the vertical groove 64 through the cooperation of the track guide groove 66 with a similar curvature to its outer wall and the fixed rod 67. The crank rod 63 drives the agitation grid 61 to move up and down through the connecting rod 62. In the process of the agitation grid 61 moving downward, the clean water on the grid plate 141 can be squeezed to move downward, and then the clean water moves from the upper end of the grid plate 141 to the lower end of the grid plate 141, and then impacts the blocked holes on the grid plate 141, further improving the cleaning and anti-blocking effect of the grid plate 141.

[0042] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A low-carbon and energy-saving sewage treatment system, comprising a sewage treatment tank (1), wherein an anaerobic tank (11), an anoxic tank (12), an aerobic tank (13), a sedimentation tank (14) and a disinfection tank (15) are arranged inside the sewage treatment tank (1) along the sewage flow direction; The aerobic tank (13) is provided with an intermittent pneumatic stirring structure (2) inside, and the sedimentation tank (14) is provided with a sludge return discharge structure (3) inside; The sedimentation tank (14) is provided with a grid plate (141) for separating sludge from clean water; Features: A cleaning structure (4) for scraping off the sludge adsorbed on the lower end of the grid plate (141) is arranged inside the sedimentation tank (14), and the cleaning structure (4) comprises a crank shaft (41), a bearing plate (42) sleeved on both ends of the crank shaft (41) and fixedly connected to the grid plate (141), a reciprocating wire groove (43) symmetrically arranged on the crank shaft (41), a mounting seat (44) symmetrically sleeved on the crank shaft (41) and reciprocatingly connected to the reciprocating wire groove (43), and a scraper (45) arranged on the mounting seat (44) and in contact with the lower end of the grid plate (141), and a driving motor (46) for driving the crank shaft (41) to rotate is fixedly arranged on the sewage treatment tank (1); The sewage treatment tank (1) is provided with a photovoltaic panel (7) connected to the drive motor (46).

2. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized in that: A guide rod (441) is symmetrically fixedly connected between the two bearing plates (42), and the mounting seat (44) is slidably sleeved on the guide rod (441).

3. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized in that: A bracket (461) for mounting the drive motor (46) is fixedly mounted on the sewage treatment tank (1); the drive motor (46) is fixedly mounted on the drive motor (46) by bolts; one end of the crank shaft (41) rotates and passes through one side of the sewage treatment tank (1); the output end of the drive motor (46) is fixedly connected to the end of the crank shaft (41).

4. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized in that: One end of the sewage treatment tank (1) is fixedly connected with a water inlet pipe (16) extending into the anaerobic tank (11); a first opening (111) is provided at the bottom between the anaerobic tank (11) and the anoxic tank (12); a second opening (121) is provided at the top between the anoxic tank (12) and the aerobic tank (13); a third opening (131) is provided at the top between the aerobic tank (13) and the sedimentation tank (14); a fourth opening (144) is provided at the top between the sedimentation tank (14) and the disinfection tank (15); the other end of the sewage treatment tank (1) is fixedly connected with a water outlet pipe (17) extending into the disinfection tank (15); the third opening (131) and the fourth opening (144) are located above the grid plate (141).

5. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized by: The intermittent pneumatic stirring structure (2) comprises a perforated aeration pipe (21) arranged in the aerobic tank (13), an air guide pipe (22) plugged into the sewage treatment tank (1) and connected to the perforated aeration pipe (21), a first solenoid valve (23) fixedly mounted on the air guide pipe (22), and an aerator (24) fixedly mounted on the sewage treatment tank (1) and connected to the air guide pipe (22), wherein the aerator (24) is connected to the photovoltaic panel (7).

6. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized by: A liquid guide tube (142) corresponding to the third opening (131) is inserted through the grid plate (141), a conical sedimentation hopper (143) is provided at the bottom of the sedimentation tank (14), the end of the liquid guide tube (142) extends to the top of the conical sedimentation hopper (143), and the crank shaft (41) rotates and passes through the liquid guide tube (142).

7. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized by: The sludge return discharge structure (3) comprises a sludge return pump (31) arranged inside the sedimentation tank (14) and connected to the inside of the conical sedimentation hopper (143), and a sludge return pipe (32) fixedly plugged into the sewage treatment tank (1) and connected to the sludge return pump (31), the end of the sludge return pipe (32) extending to the inside of the anaerobic tank (11), and a second solenoid valve (33) fixedly installed on the sludge return pipe (32).

8. The low-carbon and energy-saving sewage treatment system according to claim 7 is characterized by: The sludge return discharge structure (3) comprises a sludge discharge pipe (34) fixedly arranged on the sludge return pipe (32) corresponding to between the sludge return pump (31) and the second solenoid valve (33), and a third solenoid valve (35) fixedly installed on the sludge discharge pipe (34).

9. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized by: A fastener (5) is provided on the mounting seat (44), and the fastener (5) comprises a lifting rod (51) slidably inserted on the mounting seat (44) and fixedly connected to the lower end of the scraper (45), a baffle (52) fixedly connected to the lower end of the lifting rod (51), and a spring (53) sleeved on the lifting rod (51) corresponding to the mounting seat (44) and the scraper (45).

10. The low-carbon and energy-saving sewage treatment system according to claim 1 is characterized by: The sedimentation tank (14) is also provided with an agitation structure (6) inside, and the agitation structure (6) includes an agitation grid (61) arranged at the upper end of the grid plate (141), a connecting rod (62) symmetrically slidably inserted through the grid plate (141) and fixedly connected to the lower end of the agitation grid (61), a crank rod (63) inserted through the liquid guide tube (142) and fixedly connected to the connecting rod (62), a vertical groove (64) provided on the liquid guide tube (142) for the crank rod (63) to move up and down, a cam (65) fixedly mounted on the crank shaft (41), a track guide groove (66) provided on the cam (65), and a fixed rod (67) slidably arranged in the track guide groove (66) and fixedly connected to the crank rod (63), wherein the upper end of the agitation grid (61) is pointed.

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