A continuous flow sewage treatment system of aerobic granular sludge and its use method

Abstract

The present invention relates to the field of sewage treatment, and provides a continuous flow sewage treatment system of aerobic granular sludge and a method for using the system, including a biochemical treatment area and a horizontal flow sedimentation area, wherein an anaerobic tank, an anoxic tank and an aerobic tank are provided in the biochemical treatment area, and a horizontal flow partition sedimentation tank is provided in the horizontal flow sedimentation area, and the aerobic granular sludge in the horizontal flow partition sedimentation tank is returned to the anaerobic tank through a sludge return pipe, the anoxic tank is connected to the aerobic tank through a flow hole, the aerobic tank is connected to the horizontal flow partition sedimentation tank through a channel, the bottom wall of the aerobic tank is provided with an aeration system, the horizontal flow partition sedimentation tank is provided with a residual sludge channel, a horizontal flow sedimentation tank water distribution channel and a horizontal flow sedimentation tank outlet channel, and an iron-based polyurethane filler is provided in the anaerobic tank. The present invention can effectively increase the biological concentration in the aerobic tank, shorten the residence time, and thus increase the treatment scale, and can gradually screen and effectively separate the aerobic granular sludge, and more efficiently remove organic carbon, nitrogen, phosphorus and other pollutants in the wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a continuous flow sewage treatment system of aerobic granular sludge and a use method thereof. Background Art

[0002] At present, traditional urban sewage treatment plants are mainly based on the activated sludge process, which generally has problems such as high energy consumption, chemical consumption, land occupation and carbon emissions. Therefore, it is imperative to upgrade the process of urban sewage treatment plants.

[0003] Aerobic granular sludge (AGS) is a granular biopolymer that is spontaneously formed between microorganisms under specific environmental conditions. The particle size is greater than 0.2mm, the small particles are between 0.2-1mm, and the large particles can reach 3mm. It is a special form of biofilm. Compared with the traditional activated sludge method, aerobic granular sludge is characterized by better sedimentation performance, is completely composed of biomass, does not require a supporting carrier, has a high sludge concentration, and has no sludge expansion. It has the advantages of saving land, reducing energy consumption, reducing drug consumption, and reducing carbon emissions.

[0004] Although a large number of research reports on aerobic granular sludge have been published worldwide, its research and practical application cases are mainly concentrated in sequencing batch reactions, and there are fewer related studies and applications of continuous flow aerobic granular sludge technology. This is because most sequencing batch reactors are upflow reactors, and their cyclic periodic motion mode is different from the free random motion mode of the completely mixed plug flow reactor in the continuous flow, which can produce selective pressure, organic load abundance-deficient conditions, hydraulic shear force and other factors that are conducive to the formation of aerobic granular sludge. Therefore, it is difficult to promote and apply aerobic granular sludge technology in actual continuous flow sewage treatment plants. Summary of the invention

[0005] In view of the above technical problems, the present invention aims to provide a continuous flow sewage treatment system of aerobic granular sludge and a method for using the same. To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A continuous flow sewage treatment system for aerobic granular sludge comprises a biochemical treatment area and a horizontal flow sedimentation area. The biochemical treatment area is provided with an anaerobic tank, an anoxic tank and an aerobic tank. The horizontal flow sedimentation area is provided with a horizontal flow partition sedimentation tank. The anaerobic tank is connected to the anoxic tank through a flow hole. The anaerobic tank is connected to the horizontal flow partition sedimentation tank through a sludge return pipe. The aerobic granular sludge in the horizontal flow partition sedimentation tank is returned to the anaerobic tank through the sludge return pipe. The anoxic tank is connected to the aerobic tank through a flow hole. The aerobic tank is connected to the horizontal flow partition sedimentation tank through a channel. The bottom wall of the aerobic tank is provided with an aeration system. The horizontal flow partition sedimentation tank is provided with a residual sludge channel, a horizontal flow sedimentation tank water distribution channel and a horizontal flow sedimentation tank outlet channel. The anaerobic tank is provided with an iron-based polyurethane filler. The anoxic tank is provided with a submerged flow propeller. The horizontal flow partition sedimentation tank is connected to the anaerobic tank through a sludge return pipe. A sludge scraper is provided on the top wall of the horizontal flow sedimentation area. The sludge suction pipe of the sludge scraper extends into the horizontal flow partition sedimentation tank.

[0007] Furthermore, the anoxic tank is provided with a nitrification liquid return channel, and the horizontal flow partition sedimentation tank is provided with a return sludge channel.

[0008] Furthermore, the aeration system comprises an aeration fan and an air duct, the air duct and the aeration fan are fixedly connected, the air duct is provided with an aeration device, and all the aeration devices are fixedly connected to the bottom wall of the aerobic tank.

[0009] Furthermore, it also includes a cyclone grit chamber, which is connected to the anaerobic tank.

[0010] Furthermore, the cyclone grit chamber is connected with a coarse and fine grid.

[0011] Furthermore, a submersible agitator is connected to the anaerobic tank.

[0012] Furthermore, the submersible agitator is rotatably connected to a stirring shaft, a stirring blade and a first gear are fixedly connected to the stirring shaft, a driving box is fixedly connected to the inner wall of the anaerobic tank, a gear plate is slidably connected to the driving box, a second gear is rotatably connected to the gear plate, a storage tray is rotatably connected to the inner wall of the anaerobic tank, a third gear is fixedly connected to the storage tray, a pull rope is wound around the storage tray, a support plate and a bracket are fixedly connected to the top wall of the biochemical treatment area, a first steering wheel assembly is connected to the support plate, a guide plate is fixedly connected to the inner wall of the anaerobic tank, the guide plate extends to the top of the anaerobic tank, a net box is slidably connected to the guide plate, one end of the pull rope is fixedly connected to the top wall of the net box after being turned by the first steering wheel assembly, a purification chamber is provided on the net box, the inner wall of the purification chamber is rotatably connected to the first baffle plate through a first self-resetting rotating shaft, a push plate is slidably connected to the bottom wall of the purification chamber, and the push plate is connected to the inner wall of the purification chamber through a third elastic member. The bottom wall of the purification chamber is connected to a second steering wheel assembly, an L-shaped plate is fixedly connected to the side wall of the anaerobic tank, the L-shaped plate and the net box are against each other, a pull wire is fixedly connected to the push plate, and the pull wire passes through the net box and extends to the bottom of the net box after being turned by the second steering wheel assembly, one end of the pull wire is fixedly connected to the L-shaped plate, the purification chamber is filled with the iron-based polyurethane filler, a falling speed reduction box and a ball storage box are fixedly connected to the bracket, a guide cavity is provided on the falling speed reduction box, the guide cavity is connected with the bottom wall of the falling speed reduction box through a ball falling channel, a ball storage cavity is provided on the ball storage box, the bottom wall of the ball storage cavity is inclined, the inner wall of the ball storage cavity is rotatably connected to the second baffle through a second self-resetting rotating shaft, the ball storage cavity is filled with spare iron-based polyurethane filler, a waste box is slidably connected to the side wall of the bracket, the waste box is connected to the biochemical treatment area through a second elastic member, a resistance rod is fixedly connected to the top wall of the waste box, and the resistance rod and the second baffle are against each other.

[0013] Furthermore, a transmission cavity is provided in the drive box, the gear plate extends into the transmission cavity, a permanent magnet is fixedly connected to the gear plate, the gear plate is connected to the inner wall of the transmission cavity through a first elastic member, and an electromagnet is fixedly connected to the inner wall of the transmission cavity.

[0014] Furthermore, the inner wall of the guide cavity is inclined.

[0015] A method for using a continuous flow sewage treatment system of aerobic granular sludge comprises the following steps: sewage is sequentially treated by the anaerobic tank, the anoxic tank and the aerobic tank on the biochemical treatment area, and then the sewage enters the horizontal flow partition sedimentation tank on the horizontal flow sedimentation area for sedimentation treatment.

[0016] The present invention has the following beneficial effects:

[0017] Compared with the traditional AAO process, the present invention can effectively increase the biological concentration in the aerobic pool, shorten the residence time, and thus increase the treatment scale. In addition, due to its good nitrogen and phosphorus removal capabilities, the effluent can stably meet the standards of Class IV surface water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0019] Figure 1 It is a front view of a continuous flow sewage treatment system of aerobic granular sludge according to the present invention;

[0020] Figure 2 It is a top view of a continuous flow sewage treatment system of aerobic granular sludge according to the present invention (some parts are omitted);

[0021] Figure 3 The present invention Figure 1 The enlarged view of point A in the middle;

[0022] Figure 4 The present invention Figure 1 The enlarged view of point B in the middle;

[0023] Figure 5 The present invention Figure 3 Right side view of the middle drive box;

[0024] Figure 6 The present invention Figure 1 Enlarged view of the medium scraper and suction sludge machine.

[0025] Figure numerals: 1, anaerobic tank; 2, anoxic tank; 3, aerobic tank; 4, horizontal flow partitioned sedimentation tank; 5, scraper and suction sludge machine; 6, iron-based polyurethane filler; 7, return sludge channel; 8, residual sludge channel; 9, horizontal flow sedimentation tank water distribution channel; 10, horizontal flow sedimentation tank outlet channel; 11, nitrification liquid return channel; 12, aeration fan; 13, air duct; 14, sludge return pipe; 15, biochemical treatment area; 16, horizontal flow sedimentation area; 17, submersible agitator; 18, stirring shaft; 19, stirring blade; 20, first gear; 21, drive box; 22, second gear; 23, gear plate; 24, first elastic member; 25, permanent magnet; 26, electromagnet; 27, collector The first baffle plate is provided with a first self-resetting shaft; the second baffle plate is provided with a second self-resetting shaft; the first baffle plate is provided with a second ... DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-Figure 6 As shown, a continuous flow sewage treatment system of aerobic granular sludge includes a biochemical treatment area 15 and an advection sedimentation area 16. The biochemical treatment area 15 is provided with an anaerobic tank 1, an anoxic tank 2 and an aerobic tank 3. The advection sedimentation area 16 is provided with an advection partition sedimentation tank 4. The anaerobic tank 1 is connected to the anoxic tank 2 through a flow hole. The anaerobic tank 1 is connected to the advection partition sedimentation tank 4 through a sludge return pipe 14. The aerobic granular sludge in the advection partition sedimentation tank 4 is returned to the anaerobic tank 1 through the sludge return pipe 14. The anoxic tank 2 is connected to the aerobic tank 3 through a flow hole. The aerobic tank 3 is connected to the anaerobic tank 1 through a sludge return pipe 14, and a sludge scraper 5 is provided on the top wall of the advection sedimentation area 16. The sludge suction pipe of the sludge scraper 5 extends to the advection partition sedimentation tank 4.

[0030] According to an optional embodiment of the present invention, a nitrification liquid return channel 11 is provided on the anoxic tank 2 , and a sludge return channel 7 is provided on the horizontal flow partition sedimentation tank 4 .

[0031] According to an optional embodiment of the present invention, the aeration system includes an aeration fan 12 and an air duct 13 . The air duct 13 is fixedly connected to the aeration fan 12 . The air duct 13 is provided with an aeration device. All the aeration devices are fixedly connected to the bottom wall of the aerobic tank 3 .

[0032] According to an optional embodiment of the present invention, a cyclone grit chamber is further included, and the cyclone grit chamber is connected to the anaerobic tank 1 .

[0033] According to an optional embodiment of the present invention, a coarse and fine screen is connected to the cyclone sand settling tank. The coarse and fine screen is a device used for sewage treatment, mainly used to remove suspended matter and larger particles in sewage to protect subsequent treatment systems from damage by large particles and reduce maintenance work during the treatment process.

[0034] According to an optional embodiment of the present invention, a submersible mixer 17 is connected to the anaerobic tank 1 .

[0035] According to an optional embodiment of the present invention, the submersible agitator 17 is rotatably connected to a stirring shaft 18, a stirring blade 19 and a first gear 20 are fixedly connected to the stirring shaft 18, a driving box 21 is fixedly connected to the inner wall of the anaerobic tank 1, a gear plate 23 is slidably connected to the driving box 21, a second gear 22 is rotatably connected to the gear plate 23, a storage tray 27 is rotatably connected to the inner wall of the anaerobic tank 1, a third gear 28 is fixedly connected to the storage tray 27, a pull rope 29 is wound around the storage tray 27, and a support plate 30 and a support plate 30 are fixedly connected to the top wall of the biochemical treatment area 15. The support plate 30 is connected to the first steering wheel assembly 31, the inner wall of the anaerobic tank 1 is fixedly connected to a guide plate 53, the guide plate 53 extends to the top of the anaerobic tank 1, the guide plate 53 is slidably connected to the net box 32, one end of the pull rope 29 is turned by the first steering wheel assembly 31 and fixed to the top wall of the net box 32, the net box 32 is provided with a purification chamber 33, the inner wall of the purification chamber 33 is rotatably connected to the first baffle plate 34 through the first self-resetting shaft 35, the bottom wall of the purification chamber 33 is slidably connected to the push plate 36, the push plate 36 is connected to the purification chamber 33 through the third elastic member 54 The inner wall is connected, the bottom wall of the purification chamber 33 is connected to the second steering wheel assembly 38, the side wall of the anaerobic tank 1 is fixedly connected to an L-shaped plate 39, the L-shaped plate 39 and the net box 32 are against each other, a pull wire 37 is fixedly connected to the push plate 36, the pull wire 37 passes through the net box 32 after the second steering wheel assembly 38 is turned and extends to the bottom of the net box 32, one end of the pull wire 37 is fixedly connected to the L-shaped plate 39, the purification chamber 33 is filled with the iron-based polyurethane filler 6, the bracket 40 is fixedly connected to a falling speed reduction box 43 and a ball storage box 47, and the falling speed reduction box 43 is provided with a guide cavity 44, The guide cavity 44 is connected with the bottom wall of the falling speed reducing box 43 through the ball falling channel 45. A ball storage cavity 48 is provided on the ball storage box 47. The bottom wall of the ball storage cavity 48 is inclined. The inner wall of the ball storage cavity 48 is rotatably connected with the second baffle 49 through the second self-resetting rotating shaft 50. The ball storage cavity 48 is filled with spare iron-based polyurethane filler 51. The side wall of the bracket 40 is slidably connected with the waste box 41. The waste box 41 is connected with the biochemical treatment area 15 through the second elastic member 42. The top wall of the waste box 41 is fixedly connected with a resistance rod 46, and the resistance rod 46 and the second baffle 49 are against each other.

[0036] According to an optional embodiment of the present invention, a transmission chamber 52 is provided in the drive box 21, the gear plate 23 extends into the transmission chamber 52, a permanent magnet 25 is fixedly connected to the gear plate 23, the gear plate 23 is connected to the inner wall of the transmission chamber 52 through a first elastic member 24, and an electromagnet 26 is fixedly connected to the inner wall of the transmission chamber 52.

[0037] According to an optional implementation of the present invention, the inner wall of the guide cavity 44 is inclined.

[0038] Example:

[0039] refer to Figure 1-26. The influent COD of a municipal sewage treatment plant is 350-400 mg / L, ammonia nitrogen is 35-40 mg / L, total nitrogen is 45-50 mg / L, and total phosphorus is 4.5 mg / L. After the sewage is treated by the front coarse and fine grid and the cyclone sand settling tank, it enters the anaerobic tank 1. At the same time, the return sludge in the horizontal flow partition sedimentation tank 4 also flows back to the front end of the anaerobic tank 1. The sludge return ratio is 50-100%. After the sewage and the return sludge are mixed, they react in the anaerobic tank 1 to release phosphorus anaerobicly. In addition, the iron-based polyurethane filler 6 in the anaerobic tank 1 can dissolve and release trace iron ions in an anaerobic environment. The iron ions act as crystal nuclei to promote the formation of aerobic granular sludge. On the other hand, the iron-based polyurethane filler 6 has a porous structure and a large specific surface area. The flocculent activated sludge can adhere to the surface of the filler, while the granular sludge is suspended in the water, thereby achieving the effect of screening the granular sludge and flocculent sludge. In addition, the biofilm detached from the iron-based polyurethane filler 6 can also serve as a crystal nucleus to promote the formation of granular sludge. The hydraulic retention time of the anaerobic tank 1 is 1.5 hours. The stirring shaft 18 of the submersible stirrer 17 drives the stirring blade 19 to rotate for stirring. The stirring power is 10W / m 3 set up.

[0040] The effluent from the anaerobic tank 1 enters the anoxic tank 2, and the reflux nitrification liquid in the aerobic tank 3 also enters the anoxic tank 2, and the reflux ratio of the nitrification liquid is 200-300%. The anoxic tank 2 adopts the plug flow type, with a residence time of 6.0h, and is equipped with a submerged plug flow device. The plug flow power is 6-8W / m 3 After the effluent from the anaerobic tank 1 is mixed with the return nitrification liquid, denitrification reaction is carried out in the anoxic zone to remove the total nitrogen in the sewage.

[0041] The effluent from the anoxic pool 2 enters the aerobic pool 3, where the sewage undergoes nitrification. The aerobic pool 3 uses a multi-point water inlet method, and the multi-point water inlet volume is controlled by an electric regulating valve and an electromagnetic flowmeter on more than two valved water pipes, with an adjustment range of 0-50%. The multi-point water inlet method can produce a higher substrate concentration at the local water inlet end, creating an alternating environment of poor-rich organic matter in the local aerobic pool 3. The high-frequency alternating high and low organic load operation mode stimulates microorganisms to secrete extracellular polymers EPS, and enhances the formation and stability of aerobic granular sludge. In addition, an aeration system is provided in the aerobic pool 3. The aeration fan 12 in the aeration system adjusts the intensity of aeration according to the change in organic matter concentration, further promotes the production of extracellular polymers, and promotes the formation of aerobic granular sludge. The effluent from the aerobic pool 3 enters the horizontal flow partition sedimentation tank 4 through a channel, forming a rich-scarce environment to stimulate the growth of microorganisms. The sewage enters the horizontal flow partition sedimentation tank 4 through the water distribution channel of the horizontal flow partition sedimentation tank 4. Under the screening of the sludge settling time selection pressure, the sludge that is more conducive to sludge granulation is optimized and screened out. After gravity sedimentation, it is discharged through the outlet channel 10 of the horizontal flow sedimentation tank.

[0042] The horizontal flow partitioned sedimentation tank 4 can adopt partitioned sedimentation.

[0043] The sludge that settles to the bottom wall of the horizontal flow partition sedimentation tank 4 is mostly returned to the front reactor through the sludge suction machine 5 to maintain the concentration of the reactor's active sludge; the remaining small amount of sludge is discharged to ensure the renewal of the activated sludge. The sludge that settles to the horizontal flow partition sedimentation tank 4 has different settling properties due to the different sludge activities, and the areas that settle to the bottom wall of the horizontal flow partition sedimentation tank 4 are also different: the aerobic granular sludge with good activity and settling performance has a fast settling speed and is easy to settle to the inlet side of the horizontal flow partition sedimentation tank 4, while the flocculent sludge with poor activity and settling performance has a slow settling speed and settles more to the outlet side of the horizontal flow partition sedimentation tank 4.

[0044] The zoned sedimentation tank divides the horizontal flow sedimentation tank into two areas: an aerobic granular sludge area and a flocculent sludge area. The aerobic granular sludge is screened out for return flow and the flocculent sludge is discharged, thereby achieving the formation and stable operation of aerobic granular sludge.

[0045] Aerobic granular sludge is collected and transported by the scraper and suction sludge machine 5. When the scraper and suction sludge machine 5 runs to the aerobic granular sludge on the bottom of the water inlet end of the horizontal flow partition sedimentation tank 4, the suction pump of the scraper and suction sludge machine 5 is turned on to transport the collected aerobic granular sludge to the return sludge channel 7, and return to the anoxic tank 2. When the scraper and suction sludge machine 5 moves away from the aerobic granular sludge on the bottom of the water inlet end toward the water outlet, the valve on the top of the scraper and suction sludge machine 5 is switched to transport the collected flocculent sludge to the residual sludge channel 8 and discharge it out of the system.

[0046] The dividing line between aerobic granular sludge and flocculent sludge can be adjusted according to the operating conditions.

[0047] At the beginning of system operation, the sludge mainly exists in the form of flocs, and it takes about 2 hours for complete sedimentation. At this time, the sludge with a sedimentation time of less than 60 minutes (corresponding to 1 / 2 of the long-distance water inlet end of the horizontal flow partition sedimentation tank 4) is collected and returned to the front end for continued reaction through the scraper and suction sludge machine 5 on the horizontal flow partition sedimentation tank 4, and the sludge with a sedimentation time of more than 60 minutes is treated as residual sludge and discharged from the system, so that the sludge with good sedimentation performance and easy to form particles is retained, and the dispersed flocculent sludge with poor sedimentation performance is discharged.

[0048] As the system runs, the aerobic granular sludge particles gradually increase in size and the sedimentation performance gradually increases. At this time, the scraper and suction sludge machine 5 on the horizontal flow sedimentation 4 can collect and return the sludge with a sedimentation time of less than 30 minutes (corresponding to the 1 / 4 of the long-distance water inlet end of the horizontal flow partition sedimentation tank 4) to the front end for further reaction, and the sludge with a sedimentation time of more than 30 minutes is discharged from the system as residual sludge. Through this method, the aerobic granular sludge is gradually screened and separated, and the aerobic granular sludge is enriched in the biochemical tank.

[0049] Compared with the traditional AAO process, the present invention can effectively increase the biological concentration in the aerobic pool 3, shorten the residence time, and thus increase the treatment scale. It can gradually screen and effectively separate aerobic granular sludge to remove organic carbon, nitrogen, phosphorus and other pollutants in the wastewater. In addition, due to its good denitrification and phosphorus removal capabilities, the effluent can stably meet the standards of surface Class IV water.

[0050] refer to Figure 1 , 3 -5. The actual number of iron-based polyurethane fillers 6 and spare iron-based polyurethane fillers 51 is greater than the number shown in the attached figure. When the iron-based polyurethane filler 6 in the purification chamber 33 needs to be replaced after being used for too long, the rotation speed of the stirring shaft 18 is controlled to be reduced, and the pull rope 29 is controlled to be energized to generate magnetic repulsion, so that the permanent magnet 25, the gear plate 23, and the second gear 22 overcome the elastic force of the first elastic member 24 and move forward, and the second gear 22 is meshed with the first gear 20 and the third gear 28. The first gear 20 drives the second gear 22, the pull rope 29, and the storage tray 27 to rotate. The storage tray 27 reels the pull rope 29, thereby driving the net box 32 to move upward. After the net box 32 moves to the top of the biochemical treatment area 15, the pull wire 37 pulls the push plate 36 to move left, thereby pushing the iron-based polyurethane filler 6 in the purification chamber 33 to move left. The iron-based polyurethane filler 6 pushes the first baffle plate 34 to rotate around the first self-resetting shaft 35, and the iron-based polyurethane filler 6 falls into the guide cavity 44. The iron-based polyurethane filler 6 accumulated in the guide cavity 44 gradually falls onto the waste box 41 through the ball falling channel 45. The diameter of the ball falling channel 45 is small, which can slow down the falling speed of the iron-based polyurethane filler 6 in the guide cavity 44 , the mass of the waste box 41 gradually increases, and the waste box 41 gradually moves downward under the elastic force of the second elastic member 42, and then the electromagnet 26 is controlled to be powered off and loses its magnetic force, and the net box 32 falls under the action of its own gravity until it is against the L-shaped plate 39, and the push plate 36 moves right and resets under the elastic force of the third elastic member 54. After a period of time, when the waste box 41 moves down to a certain position, the resistance rod 46 just moves down to below the second baffle plate 49, and the second baffle plate 49 rotates counterclockwise around the second self-resetting shaft 50 under the self-resetting force of the second self-resetting shaft 50, so that the spare iron-based polyurethane filler 51 in the ball storage chamber 48 slides along the inclined bottom wall of the ball storage chamber 48 into the purification chamber 33, completing the replacement of the filler.

[0051] The present invention can utilize the driving force of the submersible agitator 17 to lift the mesh box 32, so that the mesh box 32 can complete the removal of the waste iron-based polyurethane filler 6 and the automatic replenishment of the spare iron-based polyurethane filler 51 during the lifting process, without the need to utilize traditional manual replacement operations, saving time and labor costs, with high replacement efficiency and no need to suspend the system. The setting of the falling speed reduction box 43 can reduce the descending speed of the waste box 41, thereby slowing down the rotation timing of the second baffle 49, preventing the spare iron-based polyurethane filler 51 from entering the purification chamber 33 when the push plate 36 is not moved to the right to reset, and unable to perform automatic replacement based on this principle next time.

[0052] A method for using a continuous flow sewage treatment system of aerobic granular sludge comprises the following steps: sewage is sequentially treated by the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3 on the biochemical treatment area 15, and then the sewage enters the horizontal flow partitioned sedimentation tank 4 on the horizontal flow sedimentation area 16 for sedimentation treatment.

[0053] The components, modules, mechanisms and devices not described in detail in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A continuous flow sewage treatment system of aerobic granular sludge, characterized in that: The invention comprises a biochemical treatment area (15) and a horizontal flow sedimentation area (16). The biochemical treatment area (15) is provided with an anaerobic tank (1), an anoxic tank (2) and an aerobic tank (3). The horizontal flow sedimentation area (16) is provided with a horizontal flow partition sedimentation tank (4). The anaerobic tank (1) is connected to the anoxic tank (2) through a flow hole. The anaerobic tank (1) is connected to the horizontal flow partition sedimentation tank (4) through a sludge return pipe (14). The aerobic granular sludge in the horizontal flow partition sedimentation tank (4) is returned to the anaerobic tank (1) through the sludge return pipe (14). The anoxic tank (2) is connected to the aerobic tank (3) through a flow hole. The aerobic tank (3) is connected to the horizontal flow partition sedimentation tank (4). ) is connected to the horizontal flow partition sedimentation tank (4) through a channel, the bottom wall of the aerobic tank (3) is provided with an aeration system, the horizontal flow partition sedimentation tank (4) is provided with a residual sludge channel (8), a horizontal flow sedimentation tank water distribution channel (9) and a horizontal flow sedimentation tank outlet channel (10), the anaerobic tank (1) is provided with an iron-based polyurethane filler (6), the anoxic tank (2) is provided with a submerged flow pusher, the horizontal flow partition sedimentation tank (4) is connected to the anaerobic tank (1) through a sludge return pipe (14), the top wall of the horizontal flow sedimentation area (16) is provided with a scraper and suction machine (5), and the suction pipe of the scraper and suction machine (5) extends into the horizontal flow partition sedimentation tank (4); The anaerobic tank (1) is connected to a submersible agitator (17); The submersible agitator (17) is rotatably connected to a stirring shaft (18), and a stirring blade (19) and a first gear (20) are fixedly connected to the stirring shaft (18). A driving box (21) is fixedly connected to the inner wall of the anaerobic tank (1), and a gear plate (23) is slidably connected to the driving box (21). The gear plate (23) is rotatably connected to a second gear (22). A storage tray (27) is rotatably connected to the inner wall of the anaerobic tank (1), and a third gear (28) is fixedly connected to the storage tray (27). A pull rope (29) is wound around the storage tray (27). A support plate (30) and a bracket (40) are fixedly connected to the top wall of the biochemical treatment area (15). The support plate (30) is connected to a A first steering wheel assembly (31) is connected, the inner wall of the anaerobic tank (1) is fixedly connected with a guide plate (53), the guide plate (53) extends to the top of the anaerobic tank (1), a net box (32) is slidably connected to the guide plate (53), one end of the pull rope (29) is fixedly connected to the top wall of the net box (32) after passing through the first steering wheel assembly (31), a purification chamber (33) is provided on the net box (32), the inner wall of the purification chamber (33) is rotatably connected with a first baffle plate (34) via a first self-resetting rotating shaft (35), a push plate (36) is slidably connected to the bottom wall of the purification chamber (33), the push plate (36) is connected to the inner wall of the purification chamber (33) via a third elastic member (54), and the purification chamber (33) is provided with a purification chamber (33). The bottom wall of the anaerobic tank (33) is connected to a second steering wheel assembly (38); an L-shaped plate (39) is fixedly connected to the side wall of the anaerobic tank (1); the L-shaped plate (39) and the net box (32) are in contact with each other; a pull wire (37) is fixedly connected to the push plate (36); the pull wire (37) passes through the net box (32) and extends to the bottom of the net box (32) after being turned by the second steering wheel assembly (38); one end of the pull wire (37) is fixedly connected to the L-shaped plate (39); the purification chamber (33) is filled with the iron-based polyurethane filler (6); a falling speed reduction box (43) and a ball storage box (47) are fixedly connected to the bracket (40); a guide cavity (44) is provided on the falling speed reduction box (43); and the guide cavity (44) is connected to the bottom wall of the falling speed reducing box (43) through the ball falling channel (45), and a ball storage chamber (48) is provided on the ball storage box (47). The bottom wall of the ball storage chamber (48) is inclined. The inner wall of the ball storage chamber (48) is rotatably connected to a second baffle (49) through a second self-resetting rotating shaft (50). The ball storage chamber (48) is filled with a spare iron-based polyurethane filler (51). The side wall of the bracket (40) is slidably connected to a waste box (41). The waste box (41) is connected to the biochemical treatment area (15) through a second elastic member (42). A resistance rod (46) is fixed to the top wall of the waste box (41), and the resistance rod (46) and the second baffle (49) are abutted against each other.

2. The continuous flow sewage treatment system of aerobic granular sludge according to claim 1 is characterized in that: The anoxic tank (2) is provided with a nitrification liquid return channel (11), and the horizontal flow partitioned sedimentation tank (4) is provided with a sludge return channel (7).

3. The continuous flow sewage treatment system of aerobic granular sludge according to claim 1 is characterized in that: The aeration system comprises an aeration fan (12) and an air duct (13); the air duct (13) and the aeration fan (12) are fixedly connected; an aeration device is provided on the air duct (13); and all the aeration devices are fixedly connected to the bottom wall of the aerobic tank (3).

4. The continuous flow sewage treatment system of aerobic granular sludge according to claim 1 is characterized in that: It also includes a cyclone grit chamber, which is connected to the cyclone grit chamber and the anaerobic tank (1).

5. The continuous flow sewage treatment system of aerobic granular sludge according to claim 4 is characterized in that: The cyclone sand settling tank is connected with a coarse and fine grid.

6. The method for using the continuous flow sewage treatment system of aerobic granular sludge according to claim 1, characterized in that: A transmission chamber (52) is provided in the drive box (21), the gear plate (23) extends into the transmission chamber (52), a permanent magnet (25) is fixedly connected to the gear plate (23), the gear plate (23) is connected to the inner wall of the transmission chamber (52) via a first elastic member (24), and an electromagnet (26) is fixedly connected to the inner wall of the transmission chamber (52).

7. The continuous flow sewage treatment system of aerobic granular sludge according to claim 6, characterized in that: The inner wall of the guide cavity (44) is inclined.

8. A method for using a continuous flow sewage treatment system of aerobic granular sludge, characterized in that: A continuous flow sewage treatment system based on aerobic granular sludge according to any one of claims 1 to 7, comprising the following steps: sewage is sequentially treated by the anaerobic tank (1), the anoxic tank (2) and the aerobic tank (3) on the biochemical treatment area (15), and then the sewage enters the horizontal flow partitioned sedimentation tank (4) on the horizontal flow sedimentation area (16) for sedimentation treatment.

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