A black and odorous water point source sewage treatment system

Abstract

The present invention discloses a point-source sewage treatment system for black and odorous water bodies, comprising a regulating tank, a sludge tank, an anoxic tank, an aerobic tank, a sedimentation unit, and an air pump. A sewage inlet pipe connects the regulating tank and the anoxic tank, an aeration plate is provided in the aerobic tank, and an air pipe is connected to the air pump, extending into the anoxic tank. The aerobic tank is provided with an aeration plate connected to the air pipe. The present invention overcomes the shortcomings of the prior art and features a rational design. By arranging suspended and suspended fillers, anaerobic-anoxic-aerobic microregions are formed on the fillers, increasing the species richness and biomass of the biome, effectively carrying out organic matter degradation and biological nitrification and denitrification, and possessing high social value and application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of domestic sewage treatment, and in particular to a black and odorous water body point source sewage treatment system. Background Art

[0002] Black and smelly water bodies are caused by organic pollution that exceeds the self-purification capacity of the water environment. The aerobic decomposition of organic matter causes the oxygen consumption rate in the water body to be greater than the reoxygenation rate, resulting in hypoxia in the water body, resulting in incomplete degradation of organic matter and a slower rate. The anaerobic biodegradation process produces odorous substances such as hydrogen sulfide, ammonia, and mercaptans, and at the same time forms black substances, causing the water body to become black and smelly. This phenomenon is usually caused by the uncontrolled and untreated discharge of domestic sewage, which damages the water body and causes the water source to form black and smelly water bodies.

[0003] In the treatment process of existing black and smelly water bodies, it is difficult to remove the microorganisms in the water body through simple drug and filtration treatment, resulting in poor water treatment effect.

[0004] In addition, the existing sedimentation treatment of sewage is to set up a stirring device inside the sedimentation tank to improve the sedimentation efficiency of suspended matter in the sewage. However, during the stirring treatment process, the sedimentation efficiency of the sewage will inevitably be affected, resulting in a low impact on the sedimentation treatment efficiency of the sewage.

[0005] To this end, the inventors designed and developed a point source sewage treatment system for black and odorous water bodies, which accelerated the treatment efficiency of microorganisms by adding suspended fillers and suspended fillers, and improved the overall treatment efficiency of sewage through step-by-step treatment of stirring and sedimentation. Summary of the Invention

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A point source sewage treatment system for black and odorous water bodies, comprising a regulating tank, a sludge tank, an anoxic tank, an aerobic tank, a sedimentation unit, and an air pump, wherein a sewage inlet pipe is connected between the regulating tank and the anoxic tank, an aeration disk is provided in the aerobic tank, an air pipe is connected to the air pump, and the air pipe extends into the anoxic tank, an aeration disk connected to the air pipe is provided in the aerobic tank, a hanging filler is provided in the anoxic tank, and a suspended filler is arranged in the aerobic tank;

[0008] The sedimentation unit includes a stirring barrel, a lower pipe, and a sedimentation barrel connected in sequence from top to bottom. The sedimentation barrel is provided with a mud suction pipe and an air lift pipe respectively connected to the air pipe. The mud suction pipe is also connected to a mud discharge pipe extending to the inside of the anoxic tank. The air lift pipe is also connected to a sludge return pipe extending to the inside of the sludge tank. The sedimentation barrel is provided with a support frame connected to the stirring barrel. The sedimentation barrel is connected to a drainage pipe, and the drainage pipe is connected to a clean water discharge pipe.

[0009] Preferably, the mixing barrel is provided with an input pipe communicating with the interior of the aerobic tank, a mounting plate is provided on the top of the mixing barrel, an adjustment hole is opened on the mounting plate, and an overflow mechanism is also provided in the mixing barrel.

[0010] Preferably, the overflow mechanism includes a main overflow frame connected to the mixing barrel, a secondary overflow frame is arranged inside the main overflow frame, a main overflow port is provided on the main overflow frame, a secondary overflow port matching the main overflow port is provided on the secondary overflow frame, a limiting plate matching and locking the adjusting hole is provided on the secondary overflow frame, and a locking bolt is provided on the limiting plate.

[0011] Preferably, a main shaft is provided in the mixing barrel, a stirring shaft is provided on the main shaft, a stirring blade is provided on the stirring shaft, a cross-bracing bar connected to the stirring shaft is provided on the main shaft, a balancing frame connected to the inner wall of the mixing barrel is provided at the bottom of the main shaft, and a driving motor connected to the main shaft is provided on the mounting plate.

[0012] Preferably, a gear ring is provided in the mixing barrel, and a spur gear meshing with the gear ring is provided at the end of the mixing shaft.

[0013] Preferably, a reversing mechanism is provided at the bottom end of the main shaft, and the reversing mechanism includes a ratchet connected to the bottom end of the main shaft, and a pawl is sleeved inside the ratchet.

[0014] Preferably, the pawl is provided with a wall scraping mechanism, which includes a secondary shaft connected to the pawl, a connecting frame provided on the secondary shaft, and a scraper in contact with the side wall of the bottom of the mixing barrel provided on the connecting frame.

[0015] Preferably, a communication mechanism is provided at the bottom end of the secondary shaft, and an adjustment frame acting on the communication mechanism is also provided at the bottom end of the secondary shaft.

[0016] Preferably, the connecting mechanism includes an outer ring frame that is rotatably mounted on the lower pipe, an inner baffle is provided inside the outer ring frame, a balancing sleeve rod is provided on the outer ring frame, a discharge port is opened on the inner baffle, and a sealing plate is provided on the inner baffle to provide closure for the discharge port.

[0017] Preferably, the sealing plate is provided with a convex block matching the adjustment frame, the sealing plate is provided with a connecting plate for assembling and splicing multiple sealing plates, and the connecting plate is provided with a hollow sleeve that is movably fitted with the balancing sleeve rod.

[0018] Preferably, a return spring connected to the hollow sleeve is provided in the balancing sleeve.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The suspended fillers in the anoxic tank and the hydrophilic suspended fillers added in the aerobic tank are used for microbial attachment, thereby forming anaerobic-anoxic-aerobic micro-regions on the fillers, increasing the species richness and biomass of the biological community, and effectively carrying out organic matter degradation and biological nitrification and denitrification.

[0021] 2. Through the setting of the gear ring and the mutual cooperation between the main shaft, stirring shaft, spur gear and gear ring, the stirring shaft can be driven by the spur gear to rotate, so that the stirring blades can stir the sewage in the mixing barrel, thereby improving the efficiency of the sedimentation of suspended matter in the sewage.

[0022] 3. Through the setting of the reversing mechanism and the use of the rotation direction adjustment provided by the drive motor for the main shaft, the mixing barrel can cooperate with the scraper to clean the attachments on the bottom side wall of the mixing barrel during the process of introducing sewage into the sedimentation barrel through the down pipe, effectively avoiding the accumulation of attachments.

[0023] 4. By setting up the connecting mechanism and utilizing the mutual cooperation between the adjusting frame and the protrusion, when the secondary shaft drives the adjusting frame to rotate, the discharge port can be opened through the sealing plate, so that the sewage is introduced into the interior of the sedimentation tank through the discharge port. When the secondary shaft stops rotating, the elastic deformation of the reset spring is restored, allowing the sealing plate to close the opening of the discharge port.

[0024] 5. By setting up the mixing barrel and the sedimentation barrel, and utilizing the mutual cooperation between the lower pipe and the connecting mechanism, it is possible to meet the step-by-step treatment of sewage stirring and sedimentation, complete the integrated treatment of sewage stirring and sedimentation, and improve the sedimentation efficiency of sewage.

[0025] In summary, the present invention overcomes the shortcomings of the existing technology and has a reasonable design. By setting up hanging fillers and suspended fillers, anaerobic-anoxic-aerobic micro-regions are formed on the fillers, thereby increasing the species richness and biomass of the biological community, effectively carrying out organic matter degradation and biological nitrification and denitrification, and has high social use value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a process flow chart of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the precipitation unit in the present invention;

[0029] Figure 3 It is a structural front view of the precipitation unit in the present invention;

[0030] Figure 4 It is a front cross-sectional view of the structure of the sedimentation unit in the present invention;

[0031] Figure 5 Schematic diagram of the structure of the overflow mechanism in the present invention;

[0032] Figure 6 Based Figure 5 A magnified view of the local structure at point A;

[0033] Figure 7 This is a schematic diagram of the structural splicing of the main shaft, reversing mechanism and scraping mechanism in the present invention;

[0034] Figure 8 Schematic diagram of the structural splicing of the spur gear and the gear ring in the present invention;

[0035] Figure 9 Schematic diagram of the structure of the wall scraping mechanism in the present invention;

[0036] Figure 10 It is a schematic diagram of the exploded structure of the connecting mechanism in the present invention;

[0037] Figure 11 This is a schematic diagram of the structural splicing of the balancing sleeve rod and the hollow sleeve in the present invention;

[0038] Figure 12 This is a schematic diagram of the structural splicing of the hollow sleeve and the connecting plate in the present invention;

[0039] Figure 13 It is a cross-sectional schematic diagram of the structural splicing of the balance sleeve rod and the hollow sleeve in the present invention.

[0040] In the figure: 100, regulating tank; 1001, sewage inlet pipe; 200, sludge tank; 300, anoxic tank; 400, aerobic tank; 4001, aeration plate; 500, sedimentation unit; 5001, sludge discharge pipe; 5002, sludge return pipe; 5003, clean water discharge pipe; 600, air pump; 6001, air pipe; 1, mixing tank; 101, inlet pipe; 102, mounting plate; 1021, regulating hole; 2, lowering pipe; 3, sedimentation tank; 301, drainage pipe; 302, sludge extraction pipe; 303, air lift pipe; 4, overflow mechanism; 401, primary overflow frame; 4011, primary overflow outlet; 402, secondary overflow frame; 4021, secondary overflow outlet; 403. Limit plate; 404. Locking bolt; 5. Main shaft; 51. Drive motor; 52. Stirring shaft; 521. Stirring blade; 522. Spur gear; 53. Cross brace; 54. Balancing frame; 6. Gear ring; 7. Reversing mechanism; 701. Ratchet; 702. Pawl; 8. Scraping mechanism; 801. Countershaft; 802. Connecting frame; 803. Scraper; 804. Adjusting frame; 9. Connecting mechanism; 901. Outer ring frame; 902. Inner baffle; 9021. Feeding port; 903. Balancing sleeve; 9031. Return spring; 904. Hollow sleeve; 905. Connecting plate; 906. Sealing plate; 9061. Bump; 10. Support frame. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1

[0043] Reference Figure 1-13 A point source sewage treatment system for black and odorous water bodies includes a regulating tank 100, a sludge tank 200, an anoxic tank 300, an aerobic tank 400, a sedimentation unit 500, and an air pump 600. A sewage inlet pipe 1001 is connected between the regulating tank 100 and the anoxic tank 300. An aeration disk 4001 is provided in the aerobic tank 400. An air pipe 6001 is connected to the air pump 600, and the air pipe 6001 extends into the anoxic tank 300. An aeration disk 4001 connected to the air pipe 6001 is provided in the aerobic tank 400. A hanging filler is provided in the anoxic tank 300, and a suspended filler is arranged in the aerobic tank 400.

[0044] The sedimentation unit 500 includes a mixing barrel 1, a lower pipe 2, and a sedimentation barrel 3 which are connected in sequence from top to bottom. The sedimentation barrel 3 is provided with a mud extraction pipe 302 and an air lift pipe 303 which are respectively connected to the air pipe 6001. The mud extraction pipe 302 is also connected to a mud discharge pipe 5001 extending to the interior of the anoxic tank 300. The air lift pipe 303 is also connected to a sludge return pipe 5002 extending to the interior of the sludge tank 200. The sedimentation barrel 3 is provided with a support frame 10 connected to the mixing barrel 1. The sedimentation barrel 3 is connected to a drain pipe 301, and the drain pipe 301 is connected to a clean water discharge pipe 5003.

[0045] Specifically, the mixing barrel 1 is provided with an input pipe 101 connected to the interior of the aerobic tank 400, a mounting plate 102 is provided on the top of the mixing barrel 1, and an adjustment hole 1021 is opened on the mounting plate 102. An overflow mechanism 4 is also provided in the mixing barrel 1. The input pipe 101 can guide the treated sewage in the aerobic tank 400 into the main overflow frame 401.

[0046] Specifically, the overflow mechanism 4 includes a main overflow frame 401 connected to the mixing barrel 1, a secondary overflow frame 402 is provided in the main overflow frame 401, a main overflow port 4011 is provided on the main overflow frame 401, a secondary overflow port 4021 matching the main overflow port 4011 is provided on the secondary overflow frame 402, a limiting plate 403 matching and locking the adjusting hole 1021 is provided on the secondary overflow frame 402, and a locking bolt 404 is provided on the limiting plate 403. The setting of the overflow mechanism 4 can Impurities can be left on the bottom of the main overflow frame 401. The accumulation of impurities can increase the height of the bottom of the main overflow frame 401. The locking bolt 404 cooperates with the adjustment hole 1021 to lock the position of the secondary overflow frame 402, and adjust the position between the main overflow port 4011 and the secondary overflow port 4021 to control the overflow height. Therefore, there is no need to frequently clean the impurities accumulated on the bottom of the main overflow frame 401, and the overflow disposal of sewage can also be completed through the overflow mechanism 4.

[0047] Specifically, a main shaft 5 is provided in the mixing barrel 1, a stirring shaft 52 is provided on the main shaft 5, a stirring blade 521 is provided on the stirring shaft 52, a horizontal pull bar 53 connected to the stirring shaft 52 is provided on the main shaft 5, a balancing frame 54 connected to the inner wall of the mixing barrel 1 is provided at the bottom of the main shaft 5, and a driving motor 51 connected to the main shaft 5 is provided on the mounting plate 102. Through the rotation of the main shaft 5, the stirring shaft 52 can rotate inside the mixing barrel 1, and during the rotation of the stirring shaft 52, the horizontal pull bar 53 can provide balancing for the stirring shaft 52 to avoid shaking of the stirring shaft 52.

[0048] Specifically, a gear ring 6 is provided in the mixing barrel 1, and a spur gear 522 is provided at the end of the mixing shaft 52, which is engaged with the gear ring 6. As the mixing shaft 52 rotates, the spur gear 522 can be engaged with the gear ring 6, so that the spur gear 522 can drive the mixing shaft 52 to rotate, so that the mixing blade 521 can stir the sewage.

[0049] Specifically, a reversing mechanism 7 is provided at the bottom end of the main shaft 5. The reversing mechanism 7 includes a ratchet 701 connected to the bottom end of the main shaft 5. A pawl 702 is installed inside the ratchet 701. Through the setting of the reversing mechanism 7, when the output shaft of the drive motor 51 drives the main shaft 5 to rotate forward, the ratchet 701 will not drive the pawl 702 to rotate. When the main shaft 5 is reversed, the ratchet 701 can drive the pawl 702 to rotate together.

[0050] Specifically, the pawl 702 is provided with a scraping mechanism 8, and the scraping mechanism 8 includes a secondary shaft 801 connected to the pawl 702, and a connecting frame 802 is provided on the secondary shaft 801. The connecting frame 802 is provided with a scraper 803 that contacts the bottom side wall of the mixing barrel 1. Through the setting of the scraping mechanism 8, the scraper 803 can scrape off the attachments on the bottom side wall of the mixing barrel 1 to avoid the accumulation of attachments affecting the sewage treatment effect.

[0051] Specifically, a connecting mechanism 9 is provided at the bottom end of the secondary shaft 801, and an adjusting frame 804 is also provided at the bottom end of the secondary shaft 801 for acting on the connecting mechanism 9. The setting of the connecting mechanism 9 allows the down pipe 2 to control the connection between the mixing barrel 1 and the sedimentation barrel 3, so that when the mixing barrel 1 stirs the sewage, it will not affect the sedimentation of the sewage in the sedimentation barrel 3. After the sedimentation treatment of the sewage in the sedimentation barrel 3 is completed, the sewage after the stirring treatment in the mixing barrel 1 will continue to be discharged into the sedimentation barrel 3 through the down pipe 2 for the next round of sedimentation treatment.

[0052] Example 2

[0053] Reference Figure 1-13 The difference between this embodiment and embodiment 1 is that the connecting mechanism 9 includes an outer ring frame 901 that is rotatably fitted with the down-tube 2, an inner baffle 902 is provided in the outer ring frame 901, a balancing sleeve rod 903 is provided on the outer ring frame 901, a discharge port 9021 is opened on the inner baffle 902, and a sealing plate 906 is provided on the inner baffle 902 to provide a closure for the discharge port 9021. The setting of the down-tube 2 provides a channel that can be opened and closed for the connection between the mixing barrel 1 and the sedimentation barrel 3. The sewage will be introduced from the mixing barrel 1 into the interior of the sedimentation barrel 3 through the discharge port 9021 to complete sedimentation disposal.

[0054] Specifically, the sealing plate 906 is provided with a protrusion 9061 that matches the adjustment frame 804, and the sealing plate 906 is provided with a connecting plate 905 for assembling and splicing multiple sealing plates 906. The connecting plate 905 is provided with a hollow sleeve 904 that is movably fitted with the balance sleeve rod 903. Through the setting of the sealing plate 906, the opening of the discharge port 9021 can be closed to prevent sewage from being introduced from the mixing barrel 1 into the interior of the sedimentation barrel 3.

[0055] 801 , the outer ring frame 901 can also rotate synchronously, so that the discharge port 9021 is always in the open state. The rotating sleeve between the outer ring frame 901 and the lower pipe 2 is provided with a damping to prevent the outer ring frame 901 from rotating without external force.

[0056] For other structures not described, refer to Example 1.

[0057] Working principle: In the present invention, domestic sewage is collected through the pipe network and enters the grille well to remove particulate impurities, and then introduced into the regulating tank 100 for homogenization and equalization. It is then pumped into the anoxic tank 300 through the sewage inlet pipe 1001 by the lifting pump for subsequent treatment. The treated sewage is then introduced into the aerobic tank 400. The hanging fillers provided in the anoxic tank 300 are used for microbial attachment, thereby increasing the microbial content in the tank and improving the anoxic degradation effect of organic matter. At the same time, air is regularly introduced into the anoxic tank 300 and the aerobic tank 400 through the air pipe 6001 to increase mass transfer and prevent sewage short-circuiting. The connection between the air pipe 6001 and the aeration plate 4001 is used to maintain the dissolved oxygen concentration in the aerobic tank 400 at 2 -3mg / L, and at the same time, the hydrophilic suspended filler added in the aerobic tank 400 is used for microbial attachment, thereby forming anaerobic-anoxic-aerobic micro-regions on the filler, increasing the species richness and biomass of the biological community, and effectively carrying out organic matter degradation and biological nitrification and denitrification. The sewage treated in the aerobic tank 400 is introduced into the sedimentation unit 500 through the input pipe 101 for sedimentation treatment. Air is introduced into the anoxic tank 300 and the aerobic tank 400 through the air pipe 6001 connected by the air pump 600, and the sludge discharge pipe 5001 and the sludge return pipe 5002 complete the air stripping treatment, so that the precipitated sludge enters the sludge tank 200, and the clean water is discharged from the drain pipe 301 through the clean water discharge pipe 5003;

[0058] After sewage is introduced into the primary overflow frame 401 through the input pipe 101, the primary overflow port 4011 and the secondary overflow port 4021 cooperate to allow the sewage to overflow into the mixing drum 1. By rotating the secondary overflow frame 402 and locking the locking bolt 404 with the mounting plate 102, the relative position between the primary overflow port 4011 and the secondary overflow port 4021 is controlled, and the height of the sewage overflow is adjusted;

[0059] After the sewage enters the mixing barrel 1, the output shaft of the main shaft 5 drives the drive motor 51 to rotate, causing the spur gear 522 to mesh with the gear ring 6, so that the stirring blade 521 can rotate under the drive of the stirring shaft 52 to stir the sewage. After the sewage is stirred, the output shaft of the main shaft 5 is reversed, causing the ratchet 701 to drive the pawl 702 to rotate, causing the secondary shaft 801 to rotate synchronously, so that the scraper 803 scrapes off the attachments on the side wall of the bottom of the mixing barrel 1;

[0060] When the secondary shaft 801 rotates, the adjustment frame 804 can synchronously push the protrusion 9061 to rotate the sealing plate 906, so that the discharge port 9021 is in an open state, allowing the sewage to enter the sedimentation barrel 3 through the discharge port 9021 to complete sedimentation treatment. After the sewage is introduced, the rotation of the output shaft of the main shaft 5 is closed, and the reset spring 9031 can restore the elastic deformation, allowing the hollow sleeve 904 to retreat to the inside of the balance sleeve rod 903, allowing the sealing plate 906 to close the opening of the discharge port 9021, and then allowing the sewage to overflow through the overflow mechanism 4 to the inside of the mixing barrel 1 for stirring treatment, so that the stirring and sedimentation of the sewage can be carried out separately, thereby improving the sedimentation treatment efficiency of the sewage.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0062] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A black and odorous water body point source sewage treatment system, comprising a regulating tank (100), a sludge tank (200), an anoxic tank (300), an aerobic tank (400), a sedimentation unit (500), and an air pump (600), characterized in that: A sewage inlet pipe (1001) is connected between the regulating tank (100) and the anoxic tank (300); an aeration plate (4001) is provided in the aerobic tank (400); an air pipe (6001) is connected to the air pump (600); the air pipe (6001) extends into the anoxic tank (300); and an aeration plate (4001) in communication with the air pipe (6001) is provided in the aerobic tank (400); The sedimentation unit (500) comprises a stirring barrel (1), a lowering pipe (2), and a sedimentation barrel (3) which are sequentially connected from top to bottom. The sedimentation barrel (3) is provided with a mud extraction pipe (302) and an air stripping pipe (303) which are respectively connected to an air pipe (6001). The mud extraction pipe (302) is further connected to a mud discharge pipe (5001) extending to the interior of the anoxic tank (300). The air stripping pipe (303) is further connected to a sludge return pipe (5002) extending to the interior of the sludge tank (200). A main shaft (5) is provided in the mixing barrel (1), and a reversing mechanism (7) is provided at the bottom end of the main shaft (5). The reversing mechanism (7) includes a ratchet (701) connected to the bottom end of the main shaft (5), and a ratchet pawl (702) is sleeved in the ratchet (701); The ratchet (702) is provided with a wall scraping mechanism (8), the wall scraping mechanism (8) comprising a secondary shaft (801) connected to the ratchet (702), a connecting frame (802) provided on the secondary shaft (801), and a scraper (803) in contact with the bottom side wall of the mixing barrel (1) provided on the connecting frame (802); The bottom end of the secondary shaft (801) is provided with a communication mechanism (9), and the bottom end of the secondary shaft (801) is also provided with an adjustment frame (804) acting on the communication mechanism (9); The communication mechanism (9) includes an outer ring frame (901) rotatably mounted with the lower pipe (2), an inner baffle (902) is provided in the outer ring frame (901), a balancing sleeve (903) is provided on the outer ring frame (901), a discharge port (9021) is provided on the inner baffle (902), and a sealing plate (906) is provided on the inner baffle (902) for closing the discharge port (9021). The lower pipe (2) is provided to provide a channel that can be opened and closed for the communication between the mixing barrel (1) and the sedimentation barrel (3), and sewage is introduced from the mixing barrel (1) into the interior of the sedimentation barrel (3) through the discharge port (9021) to complete sedimentation disposal; The sealing plate (906) is provided with a protrusion (9061) that matches the adjustment frame (804), and the sealing plate (906) is provided with a connecting plate (905) for assembling and splicing multiple sealing plates (906). The connecting plate (905) is provided with a hollow sleeve (904) that is movably fitted with the balancing sleeve rod (903). Through the provision of the sealing plate (906), the opening of the discharge port (9021) can be closed, so that sewage is not introduced from the mixing barrel (1) into the interior of the sedimentation barrel (3).

2. A black and odorous water point source sewage treatment system according to claim 1, characterized in that: The mixing barrel (1) is provided with an input pipe (101) communicating with the interior of the aerobic tank (400), a mounting plate (102) is provided on the top of the mixing barrel (1), an adjustment hole (1021) is provided on the mounting plate (102), and an overflow mechanism (4) is also provided in the mixing barrel (1).

3. A black and odorous water point source sewage treatment system according to claim 2, characterized in that: The overflow mechanism (4) comprises a main overflow frame (401) connected to the mixing barrel (1), a secondary overflow frame (402) being sleeved inside the main overflow frame (401), a main overflow port (4011) being provided on the main overflow frame (401), a secondary overflow port (4021) matching the main overflow port (4011) being provided on the secondary overflow frame (402), a limiting plate (403) matching and locked with the adjustment hole (1021) being provided on the secondary overflow frame (402), and a locking bolt (404) being provided on the limiting plate (403).

4. A black and odorous water point source sewage treatment system according to claim 1, characterized in that: A stirring shaft (52) is provided on the main shaft (5), and a stirring blade (521) is provided on the stirring shaft (52). A horizontal brace (53) connected to the stirring shaft (52) is provided on the main shaft (5), and a balancing frame (54) connected to the inner wall of the stirring barrel (1) is provided at the bottom of the main shaft (5).

5. A black and odorous water point source sewage treatment system according to claim 4, characterized in that: A gear ring (6) is provided in the stirring barrel (1), and a spur gear (522) meshing with the gear ring (6) is provided at the end of the stirring shaft (52).

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