Rural sewage integrated treatment device and treatment system

Abstract

The invention discloses a rural sewage integrated treatment device and system, the integrated treatment device comprises an anoxic tank, an aerobic tank, a sedimentation tank and a fan, the anoxic tank is communicated with the aerobic tank, the aerobic tank is communicated with the sedimentation tank, a reflux unit is arranged between the sedimentation tank and the anoxic tank, and the reflux unit is communicated with the anoxic tank. The sedimentation tank is communicated with the anoxic tank through a reflux unit, detection equipment is arranged in the anoxic tank, the aerobic tank and the sedimentation tank, aeration equipment is also arranged in the anoxic tank and the aerobic tank, and the aeration equipment is connected with a fan pipeline; the treatment system comprises a PLC and a remote server, the detection equipment, the aeration equipment and the backflow unit are all electrically connected with the PLC, the PLC is in wireless communication connection with the remote server, and the problems that an existing rural domestic sewage treatment facility is high in operation and maintenance cost and large in management and control difficulty, and the sewage treatment effect is difficult to guarantee are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of rural sewage treatment, and specifically discloses an integrated rural sewage treatment device and a treatment system. Background Art

[0002] At present, the treatment rate of domestic sewage in rural areas of my country is much lower than that in urban areas. The arbitrary discharge of untreated domestic sewage will cause the water in ditches and ponds to become black and smelly, and mosquitoes to breed, affecting the rural living environment and threatening the health of residents. At the same time, it will cause pollution of drinking water sources and eutrophication of lakes and reservoirs.

[0003] Rural domestic sewage has the characteristics of large dispersion, large water volume variation coefficient, and small water volume. The integrated sewage treatment equipment has the advantages of easy installation, small footprint, and low investment, and is widely used in rural domestic sewage treatment. However, in the actual domestic sewage treatment system, the water inlet pump is intermittently operated, while the fan is continuously operated or intermittently operated with the water inlet, and the dissolved oxygen in the aerobic tank is not easy to control. When the dissolved oxygen is high, the nitrification liquid returned to the anoxic tank destroys the anoxic environment and makes the total nitrogen removal effect worse. In order to ensure that the total nitrogen in the effluent meets the standard, excessive carbon source needs to be added, which greatly increases the operating cost; when the dissolved oxygen is low, it is easy to cause the effluent COD and ammonia nitrogen to fail to meet the standard. There are local dead water areas at the bottom of the aerobic pool and the anoxic pool of the integrated equipment, which will cause the effective pool capacity to decrease, resulting in insufficient residence time and poor effluent water quality; rural domestic sewage treatment sites are scattered, the operation and maintenance cost per ton of water is high, and it is difficult to control. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an integrated rural sewage treatment device and treatment system, which solves the problems of high operation and maintenance costs, great difficulty in management and control, and difficulty in ensuring sewage treatment effects of existing rural domestic sewage treatment facilities.

[0005] The specific plan is as follows: A rural sewage integrated treatment device and treatment system, the integrated treatment device comprises an anoxic tank, an aerobic tank, a sedimentation tank and a fan, the anoxic tank is connected with the aerobic tank, the aerobic tank is connected with the sedimentation tank, a reflux unit is arranged between the sedimentation tank and the anoxic tank, the sedimentation tank is connected with the anoxic tank through the reflux unit, the anoxic tank, the aerobic tank and the sedimentation tank are all provided with detection equipment, the anoxic tank and the aerobic tank are also provided with aeration equipment, and the aeration equipment is connected with the fan pipeline; the treatment system comprises a PLC controller and a remote server, the detection equipment, the aeration equipment and the reflux unit are all electrically connected with the PLC controller, and the PLC controller is wirelessly connected with the remote server.

[0006] The detection equipment in the anoxic tank includes a dissolved oxygen meter in the anoxic zone. A submersible agitator is also arranged in the anoxic tank. Both the submersible agitator and the dissolved oxygen meter in the anoxic zone are electrically connected to the PLC controller. The aeration equipment in the anoxic tank includes a perforated stirring pipe. The plane where the perforated stirring pipe is located is parallel to the plane of the bottom of the anoxic tank, and the perforated stirring pipe is fixed to the bottom of the anoxic tank in any one of the shapes of "日" (Chinese character for sun), "目" (Chinese character for eye), or "田" (Chinese character for field).

[0007] The perforated stirring pipe is provided with air holes. The air holes are arranged in two rows, and the two rows of air holes are symmetrically arranged on both sides of the center line of the perforated stirring pipe. And the central angle corresponding to the arc between any one of the air holes in the two rows and the corresponding lowest point on the perforated stirring pipe is 45 degrees. The center line of the perforated stirring pipe is a straight line along the length direction of the perforated stirring pipe.

[0008] An inlet end of a perforated pipe is also arranged on one side wall of the anoxic tank. A perforated pipe solenoid valve is arranged on the inlet end of the perforated pipe. The perforated stirring pipe is fixedly connected to the inlet end of the perforated pipe. The inlet end of the perforated pipe is flange-connected to the perforated pipe solenoid valve. The perforated pipe solenoid valve is electrically connected to the PLC controller, and the perforated pipe solenoid valve is also connected to the fan pipeline.

[0009] The detection equipment in the aerobic tank is a dissolved oxygen meter in the aerobic zone. The dissolved oxygen meter in the aerobic zone is electrically connected to the PLC controller. The aeration equipment in the aerobic tank includes at least one microporous aeration pipe. Each microporous aeration pipe is located in the same plane. The plane where each microporous aeration pipe is located is parallel to the plane of the bottom of the aerobic tank, and each microporous aeration pipe is fixed to the bottom of the aerobic tank in a row skeleton structure.

[0010] At least one inlet end of an aeration pipe is also arranged on one side wall of the aerobic tank. A solenoid valve for the aeration pipe is arranged on each inlet end of the aeration pipe. A microporous aeration pipe is fixedly connected corresponding to one inlet end of the aeration pipe. Each inlet end of the aeration pipe is flange-connected to the corresponding solenoid valve for the aeration pipe. Each solenoid valve for the aeration pipe is electrically connected to the PLC controller, and each solenoid valve for the aeration pipe is also connected to the fan pipeline.

[0011] The detection equipment in the sedimentation tank is a sludge level meter. The sludge level meter is electrically connected to the PLC controller.

[0012] The reflux unit includes a perforated reflux pipe and a reflux pump. The plane where the perforated reflux pipe is located is parallel to the plane of the bottom of the sedimentation tank. The perforated reflux pipe is fixed to the bottom of the sedimentation tank in any one of the shapes of "日" (Chinese character for "sun"), "目" (Chinese character for "eye"), or "田" (Chinese character for "field"); through holes are uniformly arranged on the bottom pipe wall of the perforated reflux pipe, and bell mouths are arranged at the through holes; a reflux pipe outlet end is arranged on one side wall of the sedimentation tank, the perforated reflux pipe is fixedly connected to the reflux pipe outlet end, the reflux pipe outlet end is flange-connected to the reflux pump, the reflux pump is electrically connected to the PLC controller, a reflux branch pipe and a sludge discharge branch pipe are further arranged on the reflux pump, a sludge discharge valve is arranged on the sludge discharge branch pipe, the sludge discharge valve is pipe-connected to the reflux pump, and the reflux pump is also pipe-connected to the anoxic tank through the reflux branch pipe.

[0013] An inlet pipe and a reflux pipe inlet end are further arranged on the anoxic tank. A raw water pump is arranged on the inlet pipe, and the raw water pump is electrically connected to the PLC controller. The reflux pipe inlet end is flange-connected to the reflux pump through the reflux branch pipe.

[0014] A first partition board is arranged between the anoxic tank and the aerobic tank. A communication hole is arranged at the bottom of the first partition board. The anoxic tank is communicated with the aerobic tank through the communication hole; a second partition board is arranged between the aerobic tank and the sedimentation tank. A rectangular hole array is arranged on the second partition board. An outlet baffle is arranged at the bottom of the rectangular hole array. The outlet baffle is fixed to the second partition board at an angle of 45 degrees. The aerobic tank is communicated with the sedimentation tank through the rectangular hole array. An outlet trough is further arranged in the sedimentation tank. The outlet trough is fixed to one side wall of the sedimentation tank in an L shape, and the plane where the outlet trough is located is parallel to the plane of the sedimentation tank. An outlet pipe is arranged at a position corresponding to the outlet trough on the side wall of the sedimentation tank, and the outlet pipe is connected to the sedimentation tank in a penetrating manner.

[0015] The invention discloses an integrated rural sewage treatment device and treatment system. Compared with the prior art, it has the following advantages: 1. A perforated stirring pipe and an anoxic zone dissolved oxygen meter are arranged in the anoxic tank. According to the dissolved oxygen value, the solenoid valve of the perforated pipe is controlled by the PLC for short-term aeration stirring, so that the anoxic environment is not damaged, the mud and water are fully mixed, the dead water area is avoided, the tank volume is fully utilized, and the efficient denitrification reaction is maintained.

[0016] 2. A microporous aeration pipe, an aerobic zone dissolved oxygen meter and an outlet baffle are arranged in the aerobic tank. The microporous aeration pipe is used for oxygenation, so that the aeration is more uniform, the oxygenation efficiency is high, the dead water area at the bottom of the tank is avoided, and the tank volume is fully utilized; the outlet baffle can effectively avoid the disturbance of the bubbles to the water flow entering the sedimentation tank.

[0017] 3. The sedimentation tank is equipped with a perforated return pipe, a mud level meter and a water outlet trough, eliminating the conventional sludge concentration area. The sludge in the sedimentation area further consumes the dissolved oxygen, ensuring the anoxic environment of the return nitrification liquid, making the front-end anoxic denitrification more complete, and the carbon source of the influent is effectively utilized, saving construction costs; the variable frequency return pump is controlled by PLC according to the mud level value to stabilize the mud level and ensure that the suspended solids in the effluent meet the standards.

[0018] 4. The perforated return pipe is provided with downward openings, and there are bell mouths at the openings, so that the return of the lower sludge area is more uniform. In the case of equipment maintenance or system shutdown, the sludge below the bell mouth settles and the supernatant is maintained at the bell mouth. When the equipment is restarted, it will not cause blockage, making the system run stably and reliably.

[0019] 5. Set the process parameters of the sewage treatment system through the PLC manager to achieve remote information centralized control, making the system operation more flexible, efficient, stable and reliable, while reducing labor costs and improving system treatment effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a top view of the integrated processing device.

[0022] Figure 3 It is a cross-sectional view of the integrated processing device.

[0023] Figure 4 It is a structural schematic diagram of a perforated stirring tube.

[0024] Figure 5 It is a schematic diagram of the structure of the perforated reflux pipe.

[0025] Figure 6 It is a schematic diagram of the structure of the first partition and the second partition.

[0026] Figure 7 It is a structural schematic diagram of the second partition and the water outlet baffle.

[0027] Figure 8 It is a schematic diagram of the structure of the outlet trough in the sedimentation tank.

[0028] The reference numerals are as follows: 1. Anoxic tank, 2. Aerobic tank, 3. Sedimentation tank, 4. Inlet pipe, 5. Return pipe inlet, 6. Return pipe outlet, 7. Outlet pipe, 8. Perforated pipe inlet, 9. Aeration pipe inlet, 10. Aeration pipe solenoid valve, 11. Perforated pipe solenoid valve, 12. Air hole, 13. Perforated stirring pipe center line, 14. Perforated stirring pipe, 15. Perforated return pipe, 16. Anoxic zone dissolved oxygen meter, 17. Aerobic zone dissolved oxygen meter, 18. Mud level meter, 19. Submersible agitator, 20. Microporous aeration pipe, 21. Outlet baffle, 22. Outlet trough, 23. Bell mouth, 24. First baffle, 25. Second baffle, 26. Return pump, 27. Mud discharge valve, 28. Raw water pump. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in 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 implementation of the present invention, not all of the implementations. 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] The present invention provides an integrated rural sewage treatment device and treatment system. The treatment system sets process parameters for sewage treatment, performs frequency conversion control through PLC according to the dissolved oxygen at the end of the anoxic zone and the aerobic zone, and the high and low limit values ​​of the mud level meter in the sedimentation zone, and adopts wireless communication technology to transmit the real-time collected data to a remote terminal display device, thereby realizing centralized monitoring of remote information, improving operation efficiency, saving land, reducing labor costs and power consumption, and enhancing system reliability. The device is particularly suitable for rural sewage treatment, and the effluent is discharged after meeting local standards.

[0031] exist Figure 1 In the figure, the dotted line represents the electrical connection, "=" represents the flange connection, and the solid line represents the pipe connection.

[0032] like Figures 1 to 3As shown in the figure, an integrated rural sewage treatment device and a treatment system are provided. The integrated treatment device includes an anoxic tank 1, an aerobic tank 2, a sedimentation tank 3, and a blower. The anoxic tank 1 is connected to the aerobic tank 2, the aerobic tank 2 is connected to the sedimentation tank 3, and a reflux unit is provided between the sedimentation tank 3 and the anoxic tank 1. The sedimentation tank is connected to the anoxic tank 1 through the reflux unit. Detection devices are provided in the anoxic tank 1, the aerobic tank 2, and the sedimentation tank 3. Aeration devices are also provided in the anoxic tank 1 and the aerobic tank 2. The aeration devices are connected to the blower through pipelines. The treatment system includes a PLC controller and a remote server. The detection devices, the aeration devices, and the reflux unit are all electrically connected to the PLC controller. The PLC controller is wirelessly communicatively connected to the remote server. Process parameters are set for the sewage treatment system through the PLC controller, and remote information centralized control is achieved through the remote server, making the system operation more flexible, efficient, stable, and reliable. At the same time, the labor cost is reduced, and the treatment effect of the system is improved.

[0033] The detection device in the anoxic tank 1 includes an anoxic zone dissolved oxygen meter 16. A submersible agitator 19 is also provided in the anoxic tank 1. The submersible agitator 19 and the anoxic zone dissolved oxygen meter 16 are both electrically connected to the PLC controller. The aeration device in the anoxic tank 1 includes a perforated agitation pipe 14. The plane where the perforated agitation pipe 14 is located is parallel to the plane of the bottom of the anoxic tank 1, and the perforated agitation pipe 14 is fixed to the bottom of the anoxic tank 1 in any one of the shapes of "日", "目", or "田", as Figure 2 shown.

[0034] As Figure 4 shown, Figure 4 in the figure (a) of Figure 4 is the front view of the perforated agitation pipe 14,

[0035] As Figure 1 shown, a perforated pipe inlet end 8 is further provided on one side wall of the anoxic tank 1. A perforated pipe solenoid valve 11 is provided on the perforated pipe inlet end 8. The perforated agitation pipe 14 is fixedly connected to the perforated pipe inlet end 8. The perforated pipe inlet end 8 is flange-connected to the perforated pipe solenoid valve 11. The perforated pipe solenoid valve 11 is electrically connected to the PLC controller, and the perforated pipe solenoid valve 11 is also connected to the blower through a pipeline.

[0036] The PLC controller performs short-term aeration and agitation through the perforated pipe solenoid valve 11 according to the dissolved oxygen value feedback by the dissolved oxygen meter 16 in the anoxic zone, so that the mud and water in the anoxic tank are fully mixed.

[0037] The detection device in the aerobic tank 2 is the aerobic zone dissolved oxygen meter 17, and the aerobic zone dissolved oxygen meter 17 is electrically connected to the PLC controller; the aeration device in the aerobic tank 2 includes at least one microporous aeration pipe 20, and each microporous aeration pipe 20 is located in the same plane. The plane where each microporous aeration pipe 20 is located is parallel to the plane where the bottom of the aerobic tank 2 is located, and each microporous aeration pipe 20 is fixed to the bottom of the aerobic tank 2 in a row skeleton structure, as Figure 2 shown, the micropore size range of the microporous aeration pipe 20 is 0.8 - 2.0 mm.

[0038] At least one inlet end 9 of the aeration pipe is further provided on one side wall of the aerobic tank 2, and a solenoid valve 10 of the aeration pipe is provided on each inlet end 9 of the aeration pipe. A microporous aeration pipe 20 is fixedly connected to an inlet end 9 of the aeration pipe correspondingly. Each inlet end 9 of the aeration pipe is flange-connected to the corresponding solenoid valve 10 of the aeration pipe. Each solenoid valve 10 of the aeration pipe is electrically connected to the PLC controller, and each solenoid valve 10 of the aeration pipe is also connected to the fan through a pipeline.

[0039] Using the microporous aeration pipe 20 for oxygenation makes the aeration more uniform, with high oxygenation efficiency, and can avoid the dead water area at the bottom of the tank, making full use of the tank volume; according to the dissolved oxygen value in the aerobic zone, the PLC is used to perform variable frequency regulation on the fan, and at the same time, the opening degree of each solenoid valve of the aeration pipe is regulated respectively, avoiding too high local dissolved oxygen in the aerobic zone, effectively reducing the power consumption and greatly saving the carbon source, and significantly reducing the operation and maintenance cost.

[0040] The detection device in the sedimentation tank 3 is the sludge level meter 18, and the sludge level meter 18 is electrically connected to the PLC controller.

[0041] The reflux unit includes a perforated reflux pipe 15 and a reflux pump 26. The plane where the perforated reflux pipe 15 is located is parallel to the plane where the bottom of the sedimentation tank 3 is located. The perforated reflux pipe 15 is fixed to the bottom of the sedimentation tank 3 in any one of the shapes of "day", "eye", or "field", as Figure 2 shown; as Figure 5 shown, through holes are uniformly arranged on the bottom pipe wall of the perforated reflux pipe 15, and a flared mouth 23 is arranged at the through holes; the flared mouth 23 makes the reflux of the lower sludge area more uniform. In the case of equipment maintenance or system shutdown, after the sludge settles below the flared mouth 23, the supernatant is at the flared mouth 23, and blockage will not be caused when the equipment is restarted, making the system operate stably and reliably.

[0042] A reflux pipe outlet end 6 is provided on one side wall of the sedimentation tank 3, the perforated reflux pipe 15 is fixedly connected to the reflux pipe outlet end 6, the reflux pipe outlet end 6 is flange-connected to a reflux pump 26, the reflux pump 26 is electrically connected to a PLC controller, the reflux pump 26 is a variable frequency reflux pump, a reflux branch pipe and a mud discharge branch pipe are also provided on the reflux pump 26, a mud discharge valve 27 is provided on the mud discharge branch pipe, the mud discharge valve 27 is connected to the reflux pump 26 pipeline, and the reflux pump 26 is also connected to the anoxic tank 1 pipeline through the reflux branch pipe.

[0043] The PLC controller controls the variable frequency reflux pump according to the mud level value to stabilize the mud level and ensure that the suspended solids in the effluent meet the standards; in the sedimentation area, the sludge further consumes the dissolved oxygen, ensuring the anoxic environment of the reflux nitrification liquid, making the front-end anoxic denitrification more complete and the inlet carbon source effectively utilized.

[0044] The anoxic pool 1 is also provided with a water inlet pipe 4 and a return pipe inlet end 5. The water inlet pipe 4 is provided with a raw water pump 28, and the raw water pump 28 is electrically connected to the PLC controller. The return pipe inlet end 5 is flange-connected to the return pump 26 through a return branch pipe.

[0045] like Figures 6 to 8 As shown, a first partition 24 is arranged between the anoxic pool 1 and the aerobic pool 2, and a connecting hole is arranged at the bottom of the first partition 24, and the anoxic pool 1 is connected with the aerobic pool 2 through the connecting hole; a second partition 25 is arranged between the aerobic pool 2 and the sedimentation pool 3, and a rectangular hole array is arranged on the second partition 25, and a water outlet baffle 21 is arranged at the bottom of the rectangular hole array, and the water outlet baffle 21 is fixed on the second partition 25 at a 45 degree angle, and the aerobic pool 2 is connected with the sedimentation pool 3 through the rectangular hole array, and the water outlet baffle 21 can effectively avoid the disturbance of bubbles to the water flow, and the water flow is the water flow from the aerobic pool 2 to the sedimentation pool 3. A water outlet trough 22 is also provided in the sedimentation tank 3. The water outlet trough 22 is L-shaped and fixed on a side wall of the sedimentation tank 3. The plane where the water outlet trough 22 is located is parallel to the plane where the sedimentation tank 3 is located. A water outlet pipe 7 is provided on the side wall of the sedimentation tank 3 and at a position corresponding to the water outlet trough 22. The water outlet pipe 7 is connected to the sedimentation tank 3.

[0046] In this embodiment, a perforated return pipe 15, a mud level meter 18 and a water outlet trough 22 are provided in the sedimentation tank 3, eliminating the conventional sludge concentration area, making full use of the tank capacity and saving construction costs.

[0047] The working process of the rural sewage integrated treatment device and treatment system is as follows: The working process of the PLC controller is: like Figure 1As shown, the input of the PLC control module includes the start and stop status of the raw water pump 28, the start and stop status of the submersible mixer 19, the start and stop status of the return pump 26, the start and stop status of the fan, the high and low limit values ​​of the mud level meter 18, the anoxic zone dissolved oxygen meter 16 and the aerobic zone dissolved oxygen meter 17.

[0048] The output of the PLC control module is connected to the start and stop module of the raw water pump 28 , the start and stop module of the fan, the start and stop module of the return pump 26 , the start and stop module of the submersible mixer 19 , the perforated pipe solenoid valve 11 and the aeration pipe solenoid valve 10 .

[0049] When the raw water pump 28 is in the on state, the PLC starts the submersible mixer 19 and controls the start of the return pump 26 at the same time. When the mud level reaches the high position of the mud level meter 18, the return pump 26 is controlled to increase the return pump flow by frequency conversion; when it reaches the low position of the mud level meter 18, the return pump 26 is controlled to reduce the return pump flow by frequency conversion.

[0050] When the raw water pump 28 is in the stopped state, the PLC controls the reflux pump 26 to stop, and at the same time stops the submersible mixer 19. The dissolved oxygen meter collects the dissolved oxygen concentration of each zone in real time, and converts it into a 4-20mA current signal through the transmitter and transmits it to the PLC controller. After the PLC performs calculations, it compares it with the set value, and the compared result outputs the high and low limits. When the dissolved oxygen concentration in the anoxic zone reaches a high level, the perforated tube solenoid valve 11 is closed and the aeration stirring is not turned on; when the dissolved oxygen concentration in the anoxic zone reaches a low level, the perforated tube solenoid valve 11 is started for a short period of aeration stirring. When the dissolved oxygen concentration in the aerobic zone reaches a low level, the fan air volume and the opening of the aeration tube solenoid valve are adjusted to increase; when the dissolved oxygen concentration in the aerobic zone reaches a high level, the fan air volume and the opening of the aeration tube solenoid valve are adjusted to decrease.

[0051] like Figure 1 As shown, the raw water is lifted by the water inlet pump and enters the anoxic tank 1 through the water inlet pipe 4. In the anoxic tank 1, the reflux nitrification liquid enters through the reflux pipe inlet end 5 and mixes with the raw water. That is, the reflux nitrification liquid in the anoxic tank reacts with the carbon source in the raw water to undergo denitrification and denitrification. At the same time, under the stirring action of the submersible agitator 19, the denitrification and denitrification reaction is carried out efficiently.

[0052] In order to avoid the occurrence of dead water areas, a perforated stirring pipe 14 and an anoxic zone dissolved oxygen meter 16 are provided in the anoxic pool 1. The fan is connected to the inlet end 8 of the perforated pipe. The perforated pipe solenoid valve 11 is controlled by the PLC controller according to the dissolved oxygen value to perform short-term aeration and stirring, so that the mud and water are fully mixed, the pool capacity is fully utilized, and the anoxic environment is kept intact; the perforated stirring pipe 14 is provided with double rows of air holes 12 facing downward at 45 degrees to ensure uniform stirring.

[0053] A first partition 24 is provided between the anoxic tank 1 and the aerobic tank 2 for partitioning the two. A hole is provided at the bottom of the first partition 24 for communication. After the mud-water mixture enters the aerobic tank 2, the PLC controls the opening of each aeration pipe solenoid valve 10 according to the dissolved oxygen value fed back by the aerobic zone dissolved oxygen meter 17 to regulate the dissolved oxygen, thereby ensuring that the system is in an aerobic state and that the dissolved oxygen at the outlet of the aerobic tank 2 is not too high. This can reduce power consumption while greatly saving carbon sources and significantly reducing operation and maintenance costs.

[0054] Under the action of the microporous aeration tube 20, bubbles are generated at the upper and lower parts of the aeration tube, the oxygenation efficiency is high, and the dead water area at the bottom of the pool can be avoided, and the pool capacity can be fully utilized. Under the action of the water outlet baffle 21, the water outlet of the aerobic pool 2 is prevented from being disturbed by bubbles on the water flow entering the sedimentation tank 3.

[0055] A second partition 25 is provided between the aerobic tank 2 and the sedimentation tank 3. The second partition 25 is provided with evenly distributed rectangular holes. After evenly distributing water, the muddy water flows to the sedimentation tank 3. After the muddy water is separated in the sedimentation tank 3, the supernatant is discharged through the outlet pipe 7 under the water level control of the outlet tank 22.

[0056] The PLC controls the flow of the return pump 26 according to the mud level value fed back by the mud level meter 18 to stabilize the mud level and ensure that the suspended solids in the effluent meet the standard. The return pump transports the mud-water mixture through the return pipe outlet end 6 to the return pipe inlet end 5 and then enters the anoxic tank 1.

[0057] The conventional sludge concentration area is omitted in the sedimentation tank 3, and the tank capacity of this area is fully utilized. During the mud-water separation process in this area, the dissolved oxygen is further consumed, ensuring the anoxic environment of the reflux nitrification liquid, making the front-end anoxic denitrification more complete, and the influent carbon source is effectively utilized, while saving construction costs.

[0058] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A rural sewage integrated treatment device and treatment system, characterized in that: The integrated treatment device includes an anoxic tank (1), an aerobic tank (2), a sedimentation tank (3) and a blower. The anoxic tank (1) is communicated with the aerobic tank (2), the aerobic tank (2) is communicated with the sedimentation tank (3), and a reflux unit is arranged between the sedimentation tank (3) and the anoxic tank (1). The sedimentation tank (3) is communicated with the anoxic tank (1) through the reflux unit. Detection devices are arranged in the anoxic tank (1), the aerobic tank (2) and the sedimentation tank (3). Aeration devices are also arranged in the anoxic tank (1) and the aerobic tank (2). The aeration devices are connected to the blower through pipelines. The treatment system includes a PLC controller and a remote server. The detection devices, the aeration devices and the reflux unit are all electrically connected to the PLC controller. The PLC controller is wirelessly communicatively connected to the remote server.

2. The rural sewage integrated treatment device and treatment system according to claim 1, characterized in that: The detection device in the anoxic tank (1) includes an anoxic zone dissolved oxygen meter (16). A submersible agitator (19) is also arranged in the anoxic tank (1). The submersible agitator (19) and the anoxic zone dissolved oxygen meter (16) are both electrically connected to the PLC controller. The aeration device in the anoxic tank (1) includes a perforated stirring pipe (14). The plane where the perforated stirring pipe (14) is located is parallel to the plane where the bottom of the anoxic tank (1) is located. The perforated stirring pipe (14) is fixed to the bottom of the anoxic tank (1) in any one of the shapes of "日" (Japanese character), "目" (Chinese character for eye) or "田" (Chinese character for field).

3. The rural sewage integrated treatment device and treatment system according to claim 2 is characterized by: Air holes (12) are arranged on the perforated stirring pipe (14). The air holes (12) are in two rows. The two rows of air holes (12) are symmetrically arranged on both sides of the center line (13) of the perforated stirring pipe. The central angle corresponding to the arc between any one of the air holes (12) in the two rows of air holes (12) and the corresponding lowest point on the perforated stirring pipe (14) is 45 degrees. The center line (13) of the perforated stirring pipe is a straight line along the length direction of the perforated stirring pipe (14).

4. The rural sewage integrated treatment device and treatment system according to claim 2, characterized in that: A perforated pipe inlet end (8) is also arranged on one side wall of the anoxic tank (1). A perforated pipe solenoid valve (11) is arranged on the perforated pipe inlet end (8). The perforated stirring pipe (14) is fixedly connected to the perforated pipe inlet end (8). The perforated pipe inlet end (8) is flange-connected to the perforated pipe solenoid valve (11). The perforated pipe solenoid valve (11) is electrically connected to the PLC controller. The perforated pipe solenoid valve (11) is also connected to the blower through a pipeline.

5. The rural sewage integrated treatment device and treatment system according to claim 1, characterized in that: The detection device in the aerobic tank (2) is an aerobic zone dissolved oxygen meter (17). The aerobic zone dissolved oxygen meter (17) is electrically connected to the PLC controller. The aeration device in the aerobic tank (2) includes at least one microporous aeration pipe (20). Each microporous aeration pipe (20) is located in the same plane. The plane where each microporous aeration pipe (20) is located is parallel to the plane where the bottom of the aerobic tank (2) is located. Each microporous aeration pipe (20) is fixed to the bottom of the aerobic tank (2) in a row skeleton structure.

6. The rural sewage integrated treatment device and treatment system according to claim 4, characterized in that: On one side wall of the aerobic tank (2), at least one inlet end (9) of an aeration pipe is further provided. An aeration pipe solenoid valve (10) is provided on each inlet end (9) of the aeration pipe. A microporous aeration pipe (20) is fixedly connected corresponding to an inlet end (9) of the aeration pipe. Each inlet end (9) of the aeration pipe is flange-connected to the corresponding aeration pipe solenoid valve (10). Each aeration pipe solenoid valve (10) is electrically connected to the PLC controller, and each aeration pipe solenoid valve (10) is also connected to the fan through a pipeline.

7. The rural sewage integrated treatment device and treatment system according to claim 1, characterized in that: The detection device in the sedimentation tank (3) is a sludge level meter (18), and the sludge level meter (18) is electrically connected to the PLC controller.

8. The rural sewage integrated treatment device and treatment system according to claim 1, characterized in that: The reflux unit includes a perforated reflux pipe (15) and a reflux pump (26). The plane where the perforated reflux pipe (15) is located is parallel to the plane where the bottom of the sedimentation tank (3) is located. The perforated reflux pipe (15) is fixed to the bottom of the sedimentation tank (3) in any one of the shapes of "day", "eye", or "field". Through holes are uniformly arranged on the bottom pipe wall of the perforated reflux pipe (15), and a flared opening (23) is arranged at the through holes. A reflux pipe outlet end (6) is arranged on one side wall of the sedimentation tank (3). The perforated reflux pipe (15) is fixedly connected to the reflux pipe outlet end (6). The reflux pipe outlet end (6) is flange-connected to the reflux pump (26). The reflux pump (26) is electrically connected to the PLC controller. A reflux branch pipe and a sludge discharge branch pipe are further arranged on the reflux pump (26). A sludge discharge valve (27) is arranged on the sludge discharge branch pipe. The sludge discharge valve (27) is connected to the reflux pump (26) through a pipeline. The reflux pump (26) is also connected to the anoxic tank (1) through the reflux branch pipe.

9. The rural sewage integrated treatment device and treatment system according to claim 7, characterized in that: An inlet pipe (4) and a reflux pipe inlet end (5) are further arranged on the anoxic tank (1). A raw water pump (28) is arranged on the inlet pipe (4). The raw water pump (28) is electrically connected to the PLC controller. The reflux pipe inlet end (5) is flange-connected to the reflux pump (26) through the reflux branch pipe.

10. The rural sewage integrated treatment device and treatment system according to claim 1, characterized in that: A first partition plate (24) is arranged between the anoxic tank (1) and the aerobic tank (2). A communication hole is arranged at the bottom of the first partition plate (24). The anoxic tank (1) is communicated with the aerobic tank (2) through the communication hole. A second partition plate (25) is arranged between the aerobic tank (2) and the sedimentation tank (3). A rectangular hole array is arranged on the second partition plate (25). An outlet baffle (21) is arranged at the bottom of the rectangular hole array. The outlet baffle (21) is fixed to the second partition plate (25) at an angle of 45 degrees. The aerobic tank (2) is communicated with the sedimentation tank (3) through the rectangular hole array. An outlet trough (22) is further arranged in the sedimentation tank (3). The outlet trough (22) is fixed to one side wall of the sedimentation tank (3) in an L shape, and the plane where the outlet trough (22) is located is parallel to the plane where the bottom of the sedimentation tank (3) is located. An outlet pipe (7) is arranged at a position on the side wall of the sedimentation tank (3) corresponding to the outlet trough (22). The outlet pipe (7) is connected to the sedimentation tank (3) through penetration.

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