Ecological sewage treatment equipment and ecological sewage treatment system based on gas lift reflux

Abstract

The present invention relates to the technical field related to sewage treatment, and specifically to ecological sewage treatment equipment and an ecological sewage treatment system based on gas lift reflux. The ecological sewage treatment equipment based on gas lift reflux comprises a box body and a first baffle, a second baffle, and a third baffle arranged in the box body and dividing the interior of the box body into an anaerobic tank, an anoxic tank, an aerobic tank, and a separation tank; and further comprises: a membrane member, which is arranged in the separation tank and divides the separation tank into a clean water chamber and a sludge chamber distributed up and down, and the sludge in the sludge chamber can be circulated to the anaerobic tank by a reflux mechanism arranged on the box body; when working, a discharge head can make a circular motion in the anaerobic tank, and an azimuth switching mechanism can change the trajectory radius of the circular motion of the discharge head, so that the sludge flows back to the anaerobic tank in a gradually diffusing manner, thereby improving the comprehensiveness of sludge application and ensuring the effect of microorganisms on the degradation and transformation of organic matter under anaerobic conditions.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewage treatment, and in particular to ecological sewage treatment equipment and an ecological sewage treatment system based on gas lift reflux. Background Art

[0002] Ecological sewage treatment is a sewage treatment method that combines the principles of natural ecosystems with modern engineering technology. It aims to simulate the self-purification ability of natural water bodies and use biological means such as plants, microorganisms and animals to efficiently remove organic matter, nitrogen, phosphorus and other pollutants in sewage, thereby achieving harmless treatment and resource utilization of sewage.

[0003] Existing ecological sewage treatment equipment usually has an air lift return pipe group to return the sludge filtered by the MBR membrane to the anaerobic tank, so as to clean the sludge in time and replenish the microorganisms in the anaerobic tank to increase the microbial content of the sludge in the anaerobic tank.

[0004] However, during the treatment process, the sewage is in a flowing state, and the sludge returned to the anaerobic tank by the air lift return pipe group is easy to flow with the sewage, which may cause the sludge to stay in the anaerobic tank for a shorter time. The microorganisms in the sludge returned to the anaerobic tank by the air lift return pipe group are difficult to fully act on the sewage to be treated in the anaerobic tank, which makes the utilization rate of the returned sludge low, resulting in poor sewage treatment effect. In this regard, some sewage treatment systems will change the sludge drop position in the anaerobic tank. However, the sludge drop point is generally fixed. In this way, the dispersion of the sludge in the anaerobic tank depends on the natural dispersion of the sewage flow, and it is difficult to ensure the degradation and transformation effect of microorganisms on organic matter in the sewage. The utilization rate of the sludge needs to be improved. Summary of the invention

[0005] The purpose of the present invention is to provide an ecological sewage treatment device and an ecological sewage treatment system based on gas stripping reflux to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ecological sewage treatment equipment based on air lift reflux, comprising a housing and a first baffle, a second baffle, and a third baffle arranged in the housing and dividing the interior of the housing into an anaerobic tank, an anoxic tank, an aerobic tank, and a separation tank; the ecological sewage treatment equipment based on air lift reflux also includes: a membrane, arranged in the separation tank, and dividing the separation tank into a clean water chamber and a sludge chamber distributed up and down, the sludge in the sludge chamber can be circulated to the anaerobic tank by a reflux mechanism arranged on the housing; a discharge head, movably arranged in the anaerobic tank and connected to the reflux mechanism, the discharge head can be driven by a driving mechanism arranged in the anaerobic tank to make a circular motion in the anaerobic tank, and an azimuth switching mechanism is also arranged in the anaerobic tank, the azimuth switching mechanism can change the trajectory radius of the circular motion of the discharge head to increase the application range of the sludge in the anaerobic tank.

[0007] As a further solution of the present invention: the driving mechanism includes a vertical shaft rotatably installed in the anaerobic tank, a first driving motor installed on the box body and with an output end connected to the vertical shaft, and a cross arm fixed to an end of the vertical shaft away from the first driving motor; wherein a guide ring is also fixed in the anaerobic tank, a guide groove is provided on the inner wall of the guide ring, two guide blocks are slidably engaged in the guide groove, the two guide blocks are respectively fixedly connected to the two ends of the cross arm, and the orientation switching mechanism can drive the discharge head to move along the length direction of the cross arm.

[0008] As a further solution of the present invention: the reflux mechanism includes an air lift reflux pipe group arranged on the side of the box body, the air lift reflux pipe group includes a reflux pipe arranged on the box body and an air inlet pipe connected to the reflux pipe, one end of the reflux pipe is connected to the sludge chamber, and the other end is connected to the discharge head through a material guide structure.

[0009] As a further solution of the present invention: a cylindrical cavity is provided in the vertical shaft, and a plurality of connecting ports for conducting the cylindrical cavity are evenly provided in the circumferential direction of the vertical shaft, the material guiding structure includes a sealing connector which is sealingly rotatably mounted on the vertical shaft and covers the connecting port, one end of the return pipe away from the sludge chamber extends into the anaerobic tank and is fixed to the sealing connector, and the discharge head is connected to the cylindrical cavity through a telescopic hose.

[0010] As a further solution of the present invention: the orientation switching mechanism includes a threaded mating component arranged in the anaerobic tank and located on the return pipe, and a transmission structure connecting the threaded mating component and the discharge head, the threaded mating component includes a sleeve mounted on the return pipe and rotatably connected to the return pipe, and a sleeve mounted on the sleeve; wherein, the outer wall of the sleeve is provided with a thread, the sleeve is threadedly connected to the sleeve, a gear is also fixed to the end of the sleeve away from the vertical shaft, and an arc-shaped tooth plate is fixed to the cross arm through a connecting arm, the arc-shaped tooth plate cooperates with the gear, and the sleeve is connected to the transmission structure.

[0011] As a further solution of the present invention: the transmission structure includes a transmission kit slidably mounted on the vertical shaft and a slider slidably mounted on the cross arm, the discharge head is fixed on the slider, and two annular protrusions are provided on the transmission kit, and a connecting block is slidably engaged between the two annular protrusions; wherein a first connecting rod is provided between the connecting block and the sleeve, and the two ends of the first connecting rod are respectively rotatably connected to the connecting block and the sleeve, and a second connecting rod is provided between the transmission kit and the slider, and the two ends of the second connecting rod are respectively rotatably connected to the transmission kit and the slider.

[0012] As a further solution of the present invention: a feed pipe extending into the anaerobic tank is installed on the box body, and the feed pipe is connected to an internal hollow disk body at one end of the anaerobic tank, and the inner wall of the disk body is provided with a conical protrusion, and a plurality of spacers are fixed in the disk body at equal intervals along the circumference; wherein, the plurality of spacers form a plurality of fan-shaped cavities in the disk body that are connected to the feed pipe, and the fan-shaped cavities are connected to the anaerobic tank via a rectangular outlet provided on the disk body, and a conical retaining ring is also formed on the upper part of the disk body.

[0013] As a further solution of the present invention: a grid plate is movably provided in the sludge chamber, and the grid plate is fixed to a horizontal plate sealingly and slidingly provided on the box body. An electric push rod is also provided on the side of the box body, and a movable end of the electric push rod is fixed to the horizontal plate. A mixing structure is provided on the grid plate.

[0014] As a further solution of the present invention: the mixing structure includes two driving shafts rotatably installed in the sludge chamber, the two driving shafts are directly connected by a transmission belt, and a second driving motor is also provided on the side of the box body, and the output end of the second driving motor is connected to one of the driving shafts; wherein, two rotating sleeves are rotatably installed on the grid plate, stirring blades are provided on the outer periphery of the rotating sleeves, and the two rotating sleeves are respectively slidably fitted with the two driving shafts, the outer wall of the driving shaft is provided with a strip protrusion, and the inner wall of the rotating sleeve is provided with a strip groove adapted to the strip protrusion.

[0015] The ecological sewage treatment system comprises the ecological sewage treatment equipment based on gas stripping reflux.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the driving mechanism works to drive the discharge head to perform circular motion in the anaerobic tank, thereby increasing the sludge spreading range and avoiding uneven sludge distribution caused by the fixed discharge position of the sludge. When the azimuth switching mechanism moves, the radius of the trajectory of the circular motion of the discharge head can be changed, so that the sludge is returned to the anaerobic tank in a gradually diffused manner, further improving the comprehensiveness of sludge spreading and ensuring the effect of microorganisms on the degradation and transformation of organic matter under anaerobic conditions; secondly, through the setting of the disc, after the sewage is pumped into the anaerobic tank, the sewage can be switched from a water column to a sheet structure, which has an effective dispersion effect on the sewage, thereby further improving the degradation and transformation effect of microorganisms on organic matter in the sewage; in addition, the stirring blades on the rotating sleeve can stir the sludge in the sludge chamber. On the one hand, stirring the sludge can avoid the problem of excessive sludge concentration, thereby causing the reflux pipe to be blocked. On the other hand, it is also beneficial for clean water to flow into the clean water chamber through the membrane element, thereby improving the separation efficiency of the membrane element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of an ecological sewage treatment equipment based on gas stripping reflux;

[0018] Figure 2 It is a structural schematic diagram of another angle of an embodiment of an ecological sewage treatment equipment based on gas stripping reflux;

[0019] Figure 3 It is a structural schematic diagram of another angle of an embodiment of an ecological sewage treatment equipment based on gas stripping reflux;

[0020] Figure 4 A schematic diagram of the internal structure of a box in an embodiment of an ecological sewage treatment device based on gas stripping reflux;

[0021] Figure 5 A schematic diagram of the internal structure of an anaerobic tank in an embodiment of an ecological sewage treatment equipment based on gas stripping reflux;

[0022] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0023] Figure 7 for Figure 6 A magnified view of the structure at center A;

[0024] Figure 8 It is a structural schematic diagram of a mixing structure in an embodiment of an ecological sewage treatment equipment based on air stripping reflux;

[0025] Fig. 9 It is a structural exploded diagram of an orientation switching mechanism in an embodiment of an ecological sewage treatment equipment based on gas lift reflux;

[0026] Fig.10 A schematic diagram of the internal structure of a disc in an embodiment of an ecological sewage treatment device based on gas stripping reflux;

[0027] Fig.11 A half-section view of a disc in an embodiment of an ecological sewage treatment device based on gas lift reflux.

[0028] In the figure: 1, box body; 101, first partition; 102, second partition; 103, third partition; 2, membrane; 201, clean water chamber; 202, sludge chamber; 3, first drive motor; 4, vertical shaft; 401, connecting port; 5, cross arm; 6, guide ring; 601, guide block; 7, discharge head; 8, gear; 9, arc gear plate; 10, transmission kit; 1001, annular protrusion; 11, connecting block; 12, first connecting rod; 13, sleeve; 14, sleeve; 15, Slider; 16. Telescopic hose; 17. Second connecting rod; 18. Sealing connector; 19. Return pipe; 20. Inlet pipe; 21. Second drive motor; 22. Drive shaft; 2201. Strip protrusion; 23. Transmission belt; 24. Rotating sleeve; 2401. Strip groove; 25. Grid plate; 26. Horizontal plate; 27. Electric push rod; 28. Feed pipe; 29. ​​Disc; 2901. Conical protrusion; 2902. Rectangular outlet; 2903. Conical retaining ring; 30. Spacer. DETAILED DESCRIPTION

[0029] 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.

[0030] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0031] See also Figure 1-Figure 11In the embodiment of the present invention, the ecological sewage treatment equipment based on gas lift reflux includes a housing 1 and a first baffle 101, a second baffle 102, and a third baffle 103 arranged in the housing 1 and dividing the interior of the housing 1 into an anaerobic tank, an anoxic tank, an aerobic tank, and a separation tank; further, the anaerobic tank mainly utilizes anaerobic microorganisms to degrade and transform organic matter under anaerobic conditions, and through the anaerobic digestion process, the macromolecular organic matter in the sewage is decomposed into small molecular organic matter, such as volatile fatty acids, methane and carbon dioxide; the main function of the anoxic tank is to remove nitrogen from the sewage through denitrification, and the denitrifying bacteria in the anoxic tank convert nitric acid into Salt is reduced to nitrogen gas, thereby removing nitrogen pollutants in sewage. The anoxic tank can further degrade organic matter in sewage and reduce organic load. The aerobic tank provides sufficient oxygen through aeration to promote the growth of aerobic microorganisms, oxidize and decompose organic matter in sewage into inorganic matter, and the nitrifying bacteria inside it convert ammonia nitrogen into nitrate nitrogen to complete the nitrification process of sewage. Phosphorus in sewage can also be absorbed through the metabolism of microorganisms. Therefore, anaerobic tanks, anoxic tanks and aerobic tanks respectively play key roles in organic matter degradation, denitrification and nitrification in sewage treatment. Through mutual cooperation, a complete sewage treatment process is formed to ensure that the sewage finally meets the discharge standards.

[0032] The ecological sewage treatment equipment based on air lift reflux also includes: a membrane 2, which is arranged in the separation tank and divides the separation tank into a clean water chamber 201 and a sludge chamber 202 distributed up and down, and the sludge in the sludge chamber 202 can be circulated to the anaerobic tank by a reflux mechanism arranged on the box body 1; a discharge head 7, which is movably arranged in the anaerobic tank and connected to the reflux mechanism, and the discharge head 7 can be driven by a driving mechanism arranged in the anaerobic tank to make a circular motion in the anaerobic tank, and an orientation switching mechanism is also arranged in the anaerobic tank, and the orientation switching mechanism can change the trajectory radius of the circular motion of the discharge head 7 to increase the application range of the sludge in the anaerobic tank.

[0033] It should be supplemented that the membrane element 2 is an MBR membrane element. The main function of the MBR membrane element is to achieve solid-liquid separation, improve effluent quality, reduce residual sludge production, and improve the overall efficiency of sewage treatment by combining efficient membrane separation technology with biological treatment technology. The membrane element 2 is an application of the prior art, and this application will not go into details. Secondly, it should be noted that the anaerobic tank, the anoxic tank, and the aerobic tank are connected in sequence, and the connection between the anaerobic tank and the anoxic tank is located at the upper part of the first partition 101, and the connection between the anoxic tank and the aerobic tank is located at the lower part of the second partition 102. The aerobic tank is connected to the sludge chamber 202, so as to improve the fluidity of sewage and reduce the occurrence of sewage short-flow phenomenon.

[0034] During operation, the water to be treated is introduced from the bottom of the anaerobic tank, and then passes through the anoxic tank and the aerobic tank in sequence, and is then separated into clean water and sludge by the membrane 2 in the separation tank. The clean water is discharged from the clean water chamber 201, and the sludge remains in the sludge chamber 202, which can be transported to the anaerobic tank by the reflux mechanism, so as to timely clean the sludge and replenish the microorganisms in the anaerobic tank to increase the microbial content of the sludge in the anaerobic tank; further, the driving mechanism works to drive the discharge head 7 to make a circular motion in the anaerobic tank, thereby increasing the sludge application range and avoiding uneven sludge distribution due to the fixed discharge position of the sludge. When the azimuth switching mechanism moves, the trajectory radius of the circular motion of the discharge head 7 can be changed, so as to further improve the comprehensiveness of sludge application and ensure the effect of microorganisms on the degradation and transformation of organic matter under anaerobic conditions.

[0035] Please refer again Figure 5 , Figure 7 as well as Fig. 9 The driving mechanism includes a vertical shaft 4 rotatably mounted in the anaerobic tank, a first driving motor 3 mounted on the housing 1 and connected to the vertical shaft 4 at its output end, and a cross arm 5 fixed to the end of the vertical shaft 4 away from the first driving motor 3. A guide ring 6 is also fixed in the anaerobic tank, and a guide groove is provided on the inner wall of the guide ring 6. Two guide blocks 601 are slidably engaged in the guide groove. The two guide blocks 601 are respectively fixedly connected to the two ends of the cross arm 5. The orientation switching mechanism can drive the discharge head 7 to move along the length direction of the cross arm 5.

[0036] When the sludge in the sludge chamber 202 is refluxed, the reflux mechanism can discharge the sludge through the discharge head 7. The first drive motor 3 works to drive the vertical shaft 4 to drive the cross arm 5 to move in a circular motion. The two guide blocks 601 slide in the guide grooves on the inner wall of the guide ring 6, which can stabilize the movement of the cross arm 5. The cross arm 5 can drive the discharge head 7 to move in a circular motion in the anaerobic tank, thereby achieving a wider range of sludge application, improving the uniformity of the final distribution of the sludge in the anaerobic tank, and ensuring the effect of microorganisms on the degradation and transformation of organic matter under anaerobic conditions.

[0037] Please refer again Figure 4 and Fig. 9 The reflux mechanism includes an air lift reflux pipe group arranged on the side of the box body 1, and the air lift reflux pipe group includes a reflux pipe 19 arranged on the box body 1 and an air inlet pipe 20 connected to the reflux pipe 19. One end of the reflux pipe 19 is connected to the sludge chamber 202, and the other end is connected to the discharge head 7 through a material guide structure.

[0038] Further, the reflux mechanism is the existing gas lift reflux technology. Gas lift reflux is a process that uses gas to lift liquid and is widely used in the field of sewage treatment. The basic principle is to inject gas into the liquid to form a gas-liquid mixture, and use the density difference between the liquid and the gas to generate an upward force, thereby achieving the reflux of the liquid. Gas lift reflux technology has many advantages. First, it can significantly reduce energy consumption. Compared with traditional electric reflux pumps, gas lift reflux has lower energy consumption and can save energy by up to 65%. Secondly, the gas lift reflux process is gentle and will not destroy the floc structure of the sludge, which helps to maintain the activity of the sludge. In addition, the gas lift reflux device usually does not require complex mechanical parts, reducing equipment failure rate and maintenance requirements.

[0039] A cylindrical cavity is provided in the vertical shaft 4, and a plurality of communication ports 401 for conducting the cylindrical cavity are evenly provided in the circumferential direction of the vertical shaft 4. The material guiding structure includes a sealing connector 18 which is sealingly rotatably mounted on the vertical shaft 4 and covers the communication port 401. One end of the return pipe 19 away from the sludge chamber 202 extends into the anaerobic tank and is fixed to the sealing connector 18. The discharge head 7 is connected to the cylindrical cavity through a telescopic hose 16.

[0040] When the sludge is refluxed, gas is injected into the reflux pipe 19 through the air inlet pipe 20. The gas and the sludge in the reflux pipe 19 form a gas-liquid mixture and flow toward the sealing connector 18, then enter the cylindrical cavity, and finally be discharged through the telescopic hose 16 and the discharge head 7. Reference may be made to a decentralized sewage treatment device disclosed in CN115583729B. The purpose of setting the telescopic hose 16 is that during operation, since the azimuth switching mechanism needs to drive the discharge head 7 to move along the length direction of the cross arm 5, the distance between the discharge head 7 and the vertical shaft 4 will change, so that the telescopic hose 16 can ensure the maintenance of the sludge reflux channel without affecting the smooth position change of the discharge head 7, so as to further improve the comprehensiveness of sludge application and ensure the effect of microorganisms on the degradation and transformation of organic matter under anaerobic conditions.

[0041] Please refer again Figure 7 and Fig. 9The orientation switching mechanism includes a threaded mating component provided in the anaerobic tank and located on the return pipe 19 and a transmission structure connecting the threaded mating component and the discharge head 7. The threaded mating component includes a sleeve 13 sleeved on the return pipe 19 and rotatably connected to the return pipe 19 and a sleeve 14 sleeved on the sleeve 13. The outer wall of the sleeve 13 is provided with threads, and the sleeve 14 is threadedly connected to the sleeve 13. A gear 8 is also fixed to the end of the sleeve 13 away from the vertical shaft 4, and an arc-shaped toothed plate 9 is fixed to the cross arm 5 through a connecting arm. The arc-shaped toothed plate 9 cooperates with the gear 8, and the sleeve 14 is connected to the transmission structure. The transmission structure includes a transmission kit 10 slidably mounted on the vertical shaft 4 and a slider 15 slidably mounted on the cross arm 5, the discharge head 7 is fixed on the slider 15, and two annular protrusions 1001 are provided on the transmission kit 10, and a connecting block 11 is slidably engaged between the two annular protrusions 1001; wherein, a first connecting rod 12 is provided between the connecting block 11 and the sleeve 14, and the two ends of the first connecting rod 12 are rotatably connected to the connecting block 11 and the sleeve 14 respectively, and a second connecting rod 17 is provided between the transmission kit 10 and the slider 15, and the two ends of the second connecting rod 17 are rotatably connected to the transmission kit 10 and the slider 15 respectively.

[0042] Specifically, during operation, the first drive motor 3 drives the cross arm 5 to rotate through the vertical shaft 4, and the cross arm 5 drives the slider 15 and the discharge head 7 to make a circular motion to achieve a circular spreading effect of the sludge. At the same time, the arc-shaped toothed plate 9 will follow the circular motion. When the teeth on the arc-shaped toothed plate 9 mesh with the gear 8, the gear 8 will drive the sleeve 13 to rotate on the return pipe 19, and then the sleeve 14 is threadedly matched with the sleeve 13 to attach Fig. 9 Taking the state shown as an example, the sleeve 14 moves on the sleeve 13 toward the vertical shaft 4, so that the transmission kit 10 is pushed to slide downward on the vertical shaft 4 through the first connecting rod 12 and the connecting block 11, and the transmission kit 10 can push the slider 15 through the second connecting rod 17 to drive the discharge head 7 to move away from the vertical shaft 4 along the length direction of the cross arm 5. Therefore, the trajectory radius of the subsequent circular motion of the discharge head 7 increases, so that the sludge is gradually diffused in the anaerobic tank. Compared with the fixed discharge method, the uniformity of the sludge distribution can be effectively guaranteed. Secondly, the rotation of the cross arm 5 in the anaerobic tank can play a certain mixing role on the sewage and microorganisms, thereby maintaining the suspended state of the sludge and promoting the attachment and biological reaction of microorganisms.

[0043] It should be noted that the first drive motor 3 should be a servo motor with a bidirectional drive output end, so that the arc-shaped tooth plate 9 can rotate in different directions, so that the gear 8 can drive the sleeve 13 to rotate forward and reverse, and the position of the discharge head 7 on the cross arm 5 can be reciprocating; secondly, it should be noted that the connection point between the anaerobic tank and the anoxic tank is lower than the sleeve 13 to prevent the sleeve 13 from being submerged in sewage, thereby affecting the thread matching accuracy between the sleeve 13 and the sleeve 14.

[0044] Please refer again Figure 5 , Fig.10 as well as Fig.11 The box 1 is provided with a feed pipe 28 extending into the anaerobic tank. The feed pipe 28 is located in the anaerobic tank and connected to an internal hollow disk 29 at one end. The inner wall of the disk 29 is provided with a conical protrusion 2901, and a plurality of spacers 30 are fixed equidistantly along the circumference of the disk 29. The plurality of spacers 30 form a plurality of fan-shaped cavities in the disk 29 that are connected to the feed pipe 28. The fan-shaped cavities are connected to the anaerobic tank through a rectangular outlet 2902 provided on the disk 29. A conical retaining ring 2903 is also formed on the upper part of the disk 29.

[0045] Furthermore, when working, the external pump body pumps the sewage to be treated into the anaerobic tank through the feed pipe 28. Due to the setting of the conical protrusion 2901, the sewage will impact the conical protrusion 2901 when entering the disk 29, so that the conical protrusion 2901 forces the sewage in the form of a water column to disperse into the multiple fan-shaped cavities, and finally be discharged through the rectangular outlet 2902. After impacting the conical retaining ring 2903, a nearly sheet-like structure can be formed; with the above setting, after the sewage is pumped into the anaerobic tank, the sewage can be switched from a water column to a sheet-like structure, which has an effective dispersion effect on the sewage, thereby further enhancing the degradation and conversion effect of microorganisms on organic matter in the sewage.

[0046] Please refer again Figure 4 , Figure 5 as well as Figure 8A movably provided grid plate 25 is provided in the sludge chamber 202, and the grid plate 25 is fixed to a transverse plate 26 which is sealingly and slidably provided on the box body 1. An electric push rod 27 is provided on the side of the box body 1, and a movable end of the electric push rod 27 is fixed to the transverse plate 26. A mixing structure is provided on the grid plate 25. The mixing structure includes two drive shafts 22 rotatably installed in the sludge chamber 202, and the two drive shafts 22 are directly connected by a transmission belt 23. A second drive motor 21 is also provided on the side of the box body 1, and the output end of the second drive motor 21 is connected to one of the drive shafts 22; two rotating sleeves 24 are rotatably installed on the grid plate 25, and stirring blades are provided on the outer periphery of the rotating sleeve 24, and the two rotating sleeves 24 are respectively slidably fitted with the two drive shafts 22, and the outer wall of the drive shaft 22 is provided with a strip protrusion 2201, and the inner wall of the rotating sleeve 24 is provided with a strip groove 2401 adapted to the strip protrusion 2201.

[0047] During operation, the second drive motor 21 works, so that the two drive shafts 22 rotate synchronously through the transmission belt 23, and then the drive shaft 22 drives the rotating sleeve 24 to rotate through the strip protrusion 2201 and the strip groove 2401, and the stirring blades on the rotating sleeve 24 can stir the sludge in the sludge chamber 202. On the one hand, stirring the sludge can avoid the problem of excessive sludge concentration, which may cause the reflux pipe 19 to be blocked. On the other hand, it is also beneficial for clean water to pass through the membrane 2 to the clean water chamber 20 1, thereby improving the separation efficiency of the membrane element 2; secondly, the electric push rod 27 works and can drive the grid plate 25 to reciprocate in the sludge chamber 202 through the cross plate 26, so that the stirring position of the stirring blade on the sludge is continuously changed, thereby ensuring the adequacy of the sludge stirring treatment. Of course, directly arranging a plurality of stirring blades along the axial direction on the driving shaft 22 can also achieve sufficient stirring. However, too many stirring blades will occupy more space in the sludge chamber 202, thereby adversely affecting the smoothness of the clean water flow and reducing the sewage treatment efficiency.

[0048] As another embodiment of the present invention, an ecological sewage treatment system is also proposed, including the ecological sewage treatment equipment based on gas stripping reflux.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ecological sewage treatment device based on air stripping reflux, comprising a housing (1) and a first baffle (101), a second baffle (102), and a third baffle (103) arranged in the housing (1) and dividing the interior of the housing (1) into an anaerobic tank, an anoxic tank, an aerobic tank, and a separation tank; characterized in that: Also includes: The membrane element (2) is arranged in the separation tank and divides the separation tank into a clean water chamber (201) and a sludge chamber (202) which are distributed vertically. The sludge in the sludge chamber (202) can be circulated to the anaerobic tank by a reflux mechanism arranged on the housing (1); a discharge head (7) is movably arranged in the anaerobic tank and connected to the reflux mechanism. The discharge head (7) can be driven by a driving mechanism arranged in the anaerobic tank to make a circular motion in the anaerobic tank. The anaerobic tank is also provided with an orientation switching mechanism. The orientation switching mechanism can change the trajectory radius of the circular motion of the discharge head (7) so as to increase the application range of the sludge in the anaerobic tank; the driving mechanism includes a rotatable device mounted on the housing (1); The anaerobic tank comprises a vertical shaft (4), a first drive motor (3) installed on the housing (1) and having an output end connected to the vertical shaft (4), and a cross arm (5) fixed to an end of the vertical shaft (4) away from the first drive motor (3); wherein a guide ring (6) is also fixed in the anaerobic tank, a guide groove is provided on the inner wall of the guide ring (6), two guide blocks (601) are slidably engaged in the guide groove, the two guide blocks (601) are respectively fixedly connected to the two ends of the cross arm (5), and the orientation switching mechanism can drive the discharge head (7) to move along the length direction of the cross arm (5); the reflux mechanism comprises an air lift reflux pipe group arranged on the side of the housing (1), and the air lift reflux pipe group is arranged on the side of the housing (1). The flow pipe group comprises a return pipe (19) arranged on the box body (1) and an air inlet pipe (20) connected to the return pipe (19); one end of the return pipe (19) is connected to the sludge chamber (202), and the other end is connected to the discharge head (7) through a material guide structure; a grid plate (25) is also movably arranged in the sludge chamber (202); the grid plate (25) is fixed to a transverse plate (26) sealingly slidably arranged on the box body (1); an electric push rod (27) is also arranged on the side of the box body (1); the movable end of the electric push rod (27) is fixed to the transverse plate (26); a mixing structure is arranged on the grid plate (25); the mixing structure comprises a rotatable device mounted on the sludge chamber (202); The two driving shafts (22) are directly connected via a transmission belt (23); a second driving motor (21) is further provided on the side of the housing (1); an output end of the second driving motor (21) is connected to one of the driving shafts (22); wherein two rotating sleeves (24) are rotatably mounted on the grid plate (25); stirring blades are provided on the outer periphery of the rotating sleeve (24); and the two rotating sleeves (24) are respectively slidably fitted with the two driving shafts (22); a strip protrusion (2201) is provided on the outer wall of the driving shaft (22); and a strip groove (2401) adapted to the strip protrusion (2201) is provided on the inner wall of the rotating sleeve (24).

2. The ecological sewage treatment equipment based on air stripping reflux according to claim 1 is characterized in that: A cylindrical cavity is provided in the vertical shaft (4), and a plurality of communication ports (401) for conducting the cylindrical cavity are evenly provided in the circumferential direction of the vertical shaft (4). The material guiding structure comprises a sealing connector (18) which is sealingly rotatably mounted on the vertical shaft (4) and covers the communication port (401). One end of the return pipe (19) away from the sludge chamber (202) extends into the anaerobic tank and is fixed to the sealing connector (18). The discharge head (7) is connected to the cylindrical cavity via a telescopic hose (16).

3. The ecological sewage treatment equipment based on air stripping reflux according to claim 2 is characterized in that: The orientation switching mechanism comprises a threaded mating component arranged in the anaerobic tank and located on the return pipe (19) and a transmission structure connecting the threaded mating component and the discharge head (7), wherein the threaded mating component comprises a sleeve (13) sleeved on the return pipe (19) and rotatably connected to the return pipe (19) and a sleeve (14) sleeved on the sleeve (13); wherein the outer wall of the sleeve (13) is provided with a thread, the sleeve (14) is threadedly connected to the sleeve (13), a gear (8) is also fixed to one end of the sleeve (13) away from the vertical shaft (4), and an arc-shaped toothed plate (9) is fixed to the cross arm (5) via a connecting arm, the arc-shaped toothed plate (9) cooperates with the gear (8), and the sleeve (14) is connected to the transmission structure.

4. The ecological sewage treatment equipment based on air stripping reflux according to claim 3 is characterized in that: The transmission structure comprises a transmission kit (10) slidably mounted on the vertical shaft (4) and a slider (15) slidably mounted on the cross arm (5); the discharge head (7) is fixed on the slider (15); two annular protrusions (1001) are provided on the transmission kit (10); a connecting block (11) is slidably engaged between the two annular protrusions (1001); wherein a first connecting rod (12) is provided between the connecting block (11) and the sleeve (14); two ends of the first connecting rod (12) are rotatably connected to the connecting block (11) and the sleeve (14); and a second connecting rod (17) is provided between the transmission kit (10) and the slider (15); two ends of the second connecting rod (17) are rotatably connected to the transmission kit (10) and the slider (15).

5. The ecological sewage treatment equipment based on air stripping reflux according to claim 1 is characterized in that: The box body (1) is provided with a feed pipe (28) extending into the anaerobic tank. One end of the feed pipe (28) is located in the anaerobic tank and is connected to an internal hollow disk body (29). The inner wall of the disk body (29) is provided with a conical protrusion (2901), and a plurality of spacers (30) are fixed at equal intervals along the circumference of the disk body (29); wherein the plurality of spacers (30) form a plurality of fan-shaped cavities in the disk body (29) that are connected to the feed pipe (28). The fan-shaped cavities are connected to the anaerobic tank via a rectangular outlet (2902) provided on the disk body (29). A conical retaining ring (2903) is also formed on the upper part of the disk body (29).

6. Ecological sewage treatment system, characterized in that: It comprises the ecological sewage treatment equipment based on gas stripping reflux as described in any one of claims 1-5.

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