A mobile sewage treatment station for water pollution control

Abstract

The application relates to the technical field of sewage treatment equipment, and discloses a mobile sewage treatment station for water pollution treatment, which comprises a compartment, an anaerobic tank, an anoxic tank, a contact oxidation tank, a sedimentation tank, a clean water tank, a self-suction pump, a filter, a sterilizer and a fan unit. The anaerobic tank, the anoxic tank and the contact oxidation tank are all provided with filler assemblies. The anaerobic tank, the anoxic tank, the contact oxidation tank, the sedimentation tank and the clean water tank are sequentially and mutually communicated. The application can ensure the removal rate of pollutants in sewage through hydrolysis acidification, nitrification, denitrification and sludge reflux and nitrification liquid reflux, save the occupied space, make the equipment be flexibly arranged in space through vehicle movement according to needs, spray the refluxed nitrification liquid while agitating the water body through the first stirring pipe and the second stirring pipe, avoid the nitrification liquid from being concentrated in the partial area in the anoxic tank, improve the efficiency of the denitrification in the anoxic tank, and further improve the sewage treatment efficiency.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and in particular to a mobile wastewater treatment station for water pollution control. Background Technology

[0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, the amount of sewage discharged is constantly increasing. However, due to the low sewage treatment rate in rural towns and villages, the pollution of natural water bodies has become more serious. It is difficult to restore water quality by relying solely on the self-purification function of water bodies. In general, centralized sewage treatment plants are used to treat sewage. Existing sewage treatment plants include an influent system, which uses equipment such as screens and pump stations to send sewage into the treatment system. The sewage passes through a biological treatment system, where organic matter is degraded and decomposed through biological tanks and aeration equipment. Then, it passes through a deep treatment system, where adsorption devices and membrane separation equipment are used to remove recalcitrant substances. In conjunction with a gas purification system, the generated gas is treated. Finally, sedimentation tanks and filter plates in the sludge treatment system are used for sludge dewatering and recycling.

[0003] However, traditional centralized sewage treatment plants face problems such as difficulty in sewage collection, high investment in sewage and reclaimed water pipelines, large land area requirements, and inconvenient construction when treating rural sewage and process wastewater similar to urban domestic sewage. These problems severely restrict the sewage treatment and reuse rate. Summary of the Invention

[0004] This application proposes a mobile sewage treatment station for water pollution control, which has the advantages of small equipment footprint, high treatment efficiency and flexible layout, in order to solve the problem that centralized sewage treatment stations are difficult to adapt to the dispersed distribution of sewage that needs to be treated.

[0005] To achieve the above objectives, this application adopts the following technical solution: a mobile sewage treatment station for water pollution control, comprising a chamber, an anaerobic tank, an anoxic tank, a contact oxidation tank, a sedimentation tank, a clear water tank, a self-priming pump, a filter, a sterilizer, and a blower unit. The anaerobic tank, anoxic tank, and contact oxidation tank are all equipped with packing assemblies. The anaerobic tank, anoxic tank, contact oxidation tank, sedimentation tank, and clear water tank are sequentially interconnected. The anaerobic tank is equipped with a pneumatic stirring assembly, which is connected to the blower unit via a pipeline. The contact oxidation tank is equipped with a microporous aeration assembly. A reflux pump is fixedly installed at the bottom of the sedimentation tank. A reflux stirring mechanism is installed inside the chamber.

[0006] Wastewater passes through an anaerobic tank, an anoxic tank, a contact oxidation tank, a sedimentation tank, and a clear water tank in sequence. The treated clear water is then discharged through a filter and a disinfector by a self-priming pump. A return pump is used to return sludge from the sedimentation tank to the anaerobic tank, and a return stirring mechanism is used to return nitrified liquid from the contact oxidation tank to the anoxic tank.

[0007] Furthermore, the anaerobic tank is equipped with a grid, the input end of the self-priming pump is connected to the clear water tank through a pipe, the output end of the self-priming pump is connected to the filter, the sterilizer is connected to the filter, and the return pump is connected to the anaerobic tank through a pipe.

[0008] Furthermore, the reflux agitation mechanism includes a first agitation tube, which is fixedly connected to several second agitation tubes. Both the first and second agitation tubes have spray holes in their bodies. The reflux agitation mechanism can agitate the water through the first and second agitation tubes and spray nitrification liquid through the spray holes.

[0009] Furthermore, the reflux stirring mechanism also includes a moving cylinder. A connecting pipe is fixedly installed at the bottom of the anoxic pool. Several fixed pipes are fixedly connected to one side of the connecting pipe. One end of the connecting pipe is slidably sleeved with the moving cylinder. A sliding plug is slidably installed inside the moving cylinder. A through hole is opened at the top of the side wall of the moving cylinder. A connecting hole is opened at one end of the connecting pipe wall. The connecting pipe is fixedly connected to the sliding plug. A solenoid valve is fixedly installed in the body of the connecting pipe. The moving cylinder can drive the first stirring pipe to move.

[0010] Furthermore, a rotating cylinder is provided at the top of the fixed tube, and a plurality of reflux holes are opened on the cylinder wall of the rotating cylinder. A filter screen is fixedly installed inside the hole wall of the reflux hole, and the number of the connecting holes is at least one.

[0011] Furthermore, a moving tube is fixedly connected to one side of the bottom of the moving cylinder. One end of the moving tube and the bottom of the moving cylinder are both provided with a connecting hole, and the two connecting holes are interconnected. One end of the moving tube is connected to a movable tube, and a one-way valve is fixedly installed on the body of the moving tube. An electric push rod is fixedly installed on one side of the anoxic pool. A connecting block is fixedly connected to one side of the bottom of the moving cylinder, and the movable tube is fixedly connected to the first stirring tube.

[0012] Furthermore, the nitrifying liquid can flow unidirectionally from the moving cylinder through the moving pipe into the movable pipe via a one-way valve, and the output end of the electric push rod is connected to the connecting block for transmission.

[0013] Furthermore, a fixing plate is fixedly installed at the bottom of the compartment, and an adjustment groove is opened on the plate body. The adjustment groove is wavy and an adjustment rod is slidably installed on the inner side. The adjustment rod is fixedly connected to the fixing plate, and the movable tube is slidably sleeved with the moving tube.

[0014] Furthermore, an inner tube is fixedly installed at the bottom of the connecting pipe, a second solenoid valve is fixedly installed on the body of the inner tube, and a vent hole is opened at the top of the inner tube.

[0015] Furthermore, the rotating cylinder is rotatably connected to the fixed pipe, and the reflux hole is inclined in the radial direction of the rotating cylinder.

[0016] The beneficial effects of this invention are as follows:

[0017] This application provides a mobile wastewater treatment plant for water pollution control. Wastewater passes through an anaerobic tank, an anoxic tank, and a contact oxidation tank, undergoing hydrolysis, acidification, nitrification, and denitrification before entering a sedimentation tank. A return pump returns sludge to the anaerobic tank and nitrified liquid to the anoxic tank, ensuring high pollutant removal rates and saving space. Combined with a mobile vehicle, this mobile wastewater treatment plant is suitable not only for urban peripheries and new districts difficult to cover by urban drainage networks, but also for relatively underdeveloped rural areas and small cities. It can treat a portion of process wastewater similar in nature to urban domestic sewage, as well as special urban wastewater from hospitals, hotels catering to foreign guests, and other similar sources.

[0018] This application provides a mobile wastewater treatment station for water pollution control. An electric push rod drives a moving cylinder to rise and fall relative to a sliding plug. Combined with the opening and closing of a one-way valve and a solenoid valve, the nitrified liquid in the contact oxidation tank can flow back to the anoxic tank through the corresponding spray holes of the first and second agitator pipes. Furthermore, the nitrified liquid is sprayed onto different positions of the packing assembly through spray holes with constantly changing heights, in conjunction with the agitation of the water by the agitator pipes. This improves the uniformity of contact between the nitrified liquid and the packing, prevents the nitrified liquid from concentrating in certain areas of the anoxic tank, and increases the efficiency of denitrification in the anoxic tank, thereby improving the overall wastewater treatment efficiency of the mobile wastewater treatment station. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the anoxic pool in this application;

[0022] Figure 3 This is a schematic cross-sectional view of the structural portion at the connecting pipe in this application;

[0023] Figure 4 For this application Figure 3 Enlarged view of the structure at point A in the image;

[0024] Figure 5This is a schematic cross-sectional view of the structure at the reflux hole in this application;

[0025] Figure 6 This is a schematic diagram of the structure at the fixing plate of this application;

[0026] Figure 7 This is a schematic cross-sectional view of the structure at the movable cylinder in this application;

[0027] Figure 8 For this application Figure 7 Enlarged view of the structure at point B in the image.

[0028] In the diagram: 1. Anaerobic tank; 2. Anoxic tank; 3. Contact oxidation tank; 4. Sedimentation tank; 5. Clear water tank; 6. Packing assembly; 7. Return pump; 8. Self-priming pump; 9. Filter; 10. Sterilizer; 11. Fan unit; 12. Chamber; 13. Connecting hole; 14. Connecting pipe; 15. Fixed pipe; 16. Rotating cylinder; 17. Moving cylinder; 18. Sliding plug; 19. Solenoid valve No. 1; 20. Moving pipe; 21. Check valve; 22. Movable pipe; 23. Agitator pipe No. 1; 24. Agitator pipe No. 2; 25. Spray hole; 26. Connecting block; 27. Electric push rod; 28. Connecting hole; 29. ​​Fixed plate; 30. Adjusting groove; 31. Adjusting rod; 32. Inner pipe; 33. Solenoid valve No. 2; 34. Vent hole; 35. Return hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, as Figures 1-3 and Figures 4-8 A mobile sewage treatment plant for water pollution control includes an anaerobic tank 1, an anoxic tank 2, a contact oxidation tank 3, a sedimentation tank 4, and a clear water tank 5. The anaerobic tank 1, anoxic tank 2, contact oxidation tank 3, sedimentation tank 4, and clear water tank 5 are all located inside the compartment 12 of the vehicle and are interconnected in sequence. The power required by the mobile sewage treatment plant comes from a generator. The anaerobic tank 1 is equipped with a screen. The anaerobic tank 1, anoxic tank 2, and contact oxidation tank 3 are all equipped with packing assemblies 6. The packing assemblies 6 can be set as semi-soft combined packing. The plant also includes a self-priming pump 8, a filter 9, a sterilizer 10, and a blower unit 11. The self-priming pump 8, filter 9, sterilizer 10, and blower unit 11 are all located inside the compartment 12.

[0031] The body 12 is equipped with a moving component, which can be a tractor-mounted assembly with the front of the tractor connected to the rear of the pallet. The input end of the self-priming pump 8 is connected to the clear water tank 5 through a pipe, and the output end of the self-priming pump 8 is connected to the filter 9. The filter 9 is a multi-media filtration device. The sterilizer 10 is an ultraviolet sterilizer connected to the filter 9. An air-powered stirring assembly is installed in the anaerobic tank 1. The air-powered stirring assembly is connected to the blower unit 11 through a pipe equipped with a pressure control valve. It stirs the bottom sludge in the anaerobic tank 1 at rated intervals. A microporous aeration assembly is installed in the contact oxidation tank 3. The microporous aeration assembly can be an aeration disc assembly. The microporous aeration assembly is connected to the blower unit 11 through a pipe equipped with a pressure control valve. The microporous aeration assembly continuously aerates in the contact oxidation tank 3. A return pump 7 is fixedly installed at the bottom of the sedimentation tank 4. The return pump 7 is connected to the anaerobic tank 1 through a pipe. The return pump 7 is used to pump the sludge in the sedimentation tank 4 into the anaerobic tank 1 to complete the sludge return.

[0032] In operation, the wastewater to be treated is pumped to the screen in the anaerobic tank 1. The screen removes impurities from the water, and then the wastewater flows by gravity to the area in the anaerobic tank 1 equipped with the packing assembly 6. The organic matter in the wastewater is decomposed by anaerobic microorganisms. Under anaerobic conditions, these microorganisms decompose complex organic matter (such as proteins, carbohydrates, fats, etc.) into simple organic acids, alcohols, carbon dioxide, and hydrogen. At the same time, the sludge after aerobic treatment is returned to this treatment unit for denitrification to effectively remove ammonia nitrogen from the water. Through the hydrolysis acidification process, the time required for aerobic biochemical treatment is shortened.

[0033] The wastewater then flows by gravity to the anoxic reaction section of the anoxic tank 2. After anaerobic treatment, the nitrate nitrogen in the wastewater is reduced to nitrogen gas by denitrifying bacteria. The nitrogen in the wastewater is removed by the microbial metabolism under anoxic conditions.

[0034] Next, the wastewater flows by gravity into the contact oxidation tank 3. At the same time, air is continuously supplied to the tank by the blower unit 11 through the microporous aeration components, providing sufficient oxygen for the aerobic microorganisms. The internal filling material can both form a biofilm and effectively cut air bubbles, improving the oxygen transfer rate and utilization rate, so that the water-air biofilm can be fully exchanged, improving the organic matter treatment efficiency. In this stage, the microorganisms oxidize and decompose the organic matter in the water into carbon dioxide and water through aerobic respiration, while releasing energy. The wastewater then flows by gravity into the sedimentation tank 4 for solid-liquid separation, sludge sedimentation, and the supernatant is lifted by the self-priming pump 8 to the multi-media filter 9 for filtration. The filtered wastewater is disinfected by ultraviolet light through the disinfection unit 10 and discharged after meeting the standards. After the mobile wastewater treatment station has finished treating the wastewater, it can be driven to other places that need wastewater treatment.

[0035] The aerobic nitrified liquor generated in the contact oxidation tank 3 needs to be returned to the anoxic tank 2 for denitrification. Currently, the nitrified liquor is usually pumped from the contact oxidation tank 3 into the anoxic tank 2 using a lift pump, and then stirred by a pneumatic agitator. However, the pneumatic agitator introduces oxygen, and frequent stirring can easily lead to an increase in dissolved oxygen content in the anoxic tank 2, inhibiting the anoxic denitrification process and reducing denitrification efficiency. Reducing the stirring frequency of the pneumatic agitator makes it difficult for the pumped-back nitrified liquor to fully contact the biofilm on the packing assembly 6 in the anoxic tank 2, affecting the denitrification efficiency.

[0036] A movable cylinder 17 is installed on one side of the anoxic pool 2. (See reference) Figure 3 The bottom of the anoxic tank 2 is connected to the contact oxidation tank 3. A connecting pipe 14 is fixedly installed at the bottom of the anoxic tank 2, extending into the contact oxidation tank 3. Several fixed pipes 15 are fixedly connected to one side of the connecting pipe 14. The fixed pipes 15 are arranged at even intervals. (See reference...) Figure 5 A rotating cylinder 16 is provided at the top of the fixed pipe 15. The cylinder wall of the rotating cylinder 16 has several return holes 35 arranged in a ring at even intervals. A filter screen is fixedly installed inside the hole wall of each return hole 35. The cavity of the rotating cylinder 16 communicates with the pipe hole of the fixed pipe 15. (See reference...) Figure 7 One end of the connecting pipe 14 is slidably connected to the movable cylinder 17.

[0037] A sliding plug 18 is slidably disposed inside the movable cylinder 17, separating the cavity of the movable cylinder 17. A through hole is provided at the top of the side wall of the movable cylinder 17, located at the top of the sliding plug 18. (See reference...) Figure 8 One end of the connecting pipe 14 has a connecting hole 28. The number of connecting holes 28 is at least one. The cavity of the moving cylinder 17 located at the bottom of the sliding plug 18 is connected to the hole of the connecting pipe 14 through the connecting hole 28. The connecting pipe 14 is fixedly connected to the sliding plug 18. A solenoid valve 19 is fixedly installed on the body of the connecting pipe 14. A moving pipe 20 is fixedly connected to one side of the bottom of the moving cylinder 17. One end of the moving pipe 20 and the bottom of the moving cylinder 17 both have a connecting hole 13. The two connecting holes 13 are connected to each other.

[0038] The connecting hole 13 connects the cavity of the movable cylinder 17 to the pipe hole of the movable tube 20. One end of the movable tube 20 is connected to a movable tube 22. A one-way valve 21 is fixedly installed on the body of the movable tube 20. (See reference) Figure 7The nitrifying liquid can flow unidirectionally from the moving cylinder 17 through the moving pipe 20 into the movable pipe 22 via the one-way valve 21. A first agitator 23 is fixedly connected to the bottom of the movable pipe 22. Several second agitator pipes 24 are fixedly connected to the first agitator pipe 23. The second agitator pipes 24 are arranged in a crisscross pattern relative to the first agitator pipe 23 at even intervals. Both the first agitator pipe 23 and the second agitator pipes 24 have spray holes 25 on their bodies. An electric push rod 27 is fixedly installed on one side of the anoxic tank 2. (See reference...) Figure 6 A connecting block 26 is fixedly connected to one side of the bottom of the movable cylinder 17, and the output end of the electric push rod 27 is connected to the connecting block 26 for transmission.

[0039] The working principle of this embodiment is as follows:

[0040] Fixed tube 15, agitator tube 23 and agitator tube 24 are located between the corresponding packing assemblies 6, see reference. Figure 2 The rotating cylinder 16 is located at the top of the contact oxidation tank 3. When the sewage passes through the contact oxidation tank 3, it flows from the bottom to the top of the packing assembly 6. After aerobic nitrification, nitrified liquid is produced. When the nitrified liquid needs to be returned to the anoxic tank 2, the electric push rod 27 retracts. The electric push rod 27 drives the connecting block 26 to descend. The moving connecting block 26 drives the moving cylinder 17 to descend relative to the connecting pipe 14. The first solenoid valve 19 remains open. The connecting pipe 14 fixes the sliding plug 18 so that the sliding plug 18 rises relative to the moving cylinder 17 to form a negative pressure. This allows the nitrified liquid in the top area of ​​the contact oxidation tank 3 to enter the moving cylinder 17 through the return hole 35, the rotating cylinder 16, the fixed pipe 15, and the connecting pipe 14.

[0041] After the moving cylinder 17 moves a rated distance relative to the sliding plug 18, the first solenoid valve 19 is closed, and the electric push rod 27 extends and resets, causing the moving cylinder 17 to rise relative to the sliding plug 18. The sliding plug 18 pushes the nitrified liquid into the moving cylinder 17 into the movable pipe 22, allowing the nitrified liquid to pass through the one-way valve 21 in one direction and flow through the moving pipe 20, the movable pipe 22, the first stirring pipe 23, and the second stirring pipe 24. The liquid is then sprayed out from the corresponding spray holes 25 of the first stirring pipe 23 and the second stirring pipe 24 in a dispersed manner, and the nitrified liquid is sprayed towards the corresponding packing component area, so that the nitrified liquid can flow back to the packing component 6 area more accurately. The nitrified liquid can also more effectively contact the biofilm on the packing component 6, improving the efficiency of denitrification.

[0042] Simultaneously, during the nitrification liquid spraying process, the moving cylinder 17 drives the moving pipe 20 to move, the moving pipe 20 drives the movable pipe 22 to move, the movable pipe 22 drives the first stirring pipe 23 to move, and then drives the second stirring pipe 24 to move. The movement of the first stirring pipe 23 and the second stirring pipe 24 agitates the sewage in the anoxic tank 2, which is beneficial to the dispersion of the nitrification liquid. It also causes the spray hole 25 to correspond with the different height parts of the corresponding packing assembly 6. When rising, the sprayed nitrification liquid comes into uniform contact with the different height parts of the packing assembly 6, improving the uniformity of dispersion of the return nitrification liquid and the biofilm formation area of ​​the packing assembly 6, and further improving the efficiency of denitrification in the anoxic tank 2.

[0043] Example 2, as Figures 1-3 and Figures 5-8 Based on Embodiment 1, a fixing plate 29 is fixedly installed at the bottom of the compartment 12, and the fixing plate 29 has an adjustment groove 30. (See reference...) Figure 6 The adjusting groove 30 is wavy and has an adjusting rod 31 that slides on its inner side. The adjusting rod 31 is fixedly connected to the fixing plate 29. (See reference) Figure 7 The movable tube 22 is L-shaped and slidably connected to the moving tube 20. When the adjusting rod 31 slides along the adjusting groove 30, it can drive the movable tube 22 to slide horizontally relative to the moving tube 20.

[0044] The working principle of this embodiment is as follows:

[0045] When the moving cylinder 17 rises relative to the sliding plug 18 to reflux the nitrified liquid, the moving cylinder 17, in conjunction with the moving pipe 20, drives the movable pipe 22 to move. The movable pipe 22 drives the first stirring pipe 23 and the second stirring pipe 24 to move, while simultaneously driving the adjusting rod 31 to move. The adjusting rod 31 moves along the adjusting groove 30 relative to the fixed plate 29. The inner wall of the adjusting groove 30 abuts against the adjusting rod 31, causing the adjusting rod 31 to produce a horizontal displacement. The adjusting rod 31 drives the movable pipe 22 and the moving pipe 20 to move horizontally relative to the moving pipe 20 during the synchronous lifting and lowering process. This causes the first stirring pipe 23 and the second stirring pipe 24 to move horizontally while moving vertically. This increases the stirring range and thus the stirring efficiency, while also increasing the spray range of the spray holes 25 on the second stirring pipe 24. This allows the spray holes 25 to correspond to different horizontal positions of the biofilm attachment area of ​​the corresponding packing assembly 6, thereby further improving the stirring efficiency of the wastewater and the dispersion efficiency of the digestate, and improving the overall denitrification efficiency.

[0046] Example 3, as Figures 1-8 Based on Embodiment 2, an inner tube 32 is fixedly installed at the bottom of the connecting tube 14, see reference. Figure 4 The inner pipe 32 is fixedly equipped with a second solenoid valve 33. The inner pipe 32 is connected to the fan unit 11 through a pipeline. (See reference...) Figure 5The top of the inner tube 32 is provided with a vent hole 34, which connects the tube hole of the inner tube 32 with the cavity of the rotating cylinder 16. The rotating cylinder 16 is rotatably connected to the fixed tube 15, and the return hole 35 is inclined in the radial direction of the rotating cylinder 16.

[0047] The working principle of this embodiment is as follows:

[0048] At the designated interval, while keeping solenoid valve 19 closed, solenoid valve 33 is opened, and blower unit 11 supplies air into inner pipe 32. The airflow passes through inner pipe 32 and vent 34 into the cavity of rotating cylinder 16 and is ejected through return hole 35, forming aeration and back-blowing the filter screen on return hole 35 to prevent filter screen blockage and ensure the reliability of the mobile sewage treatment station. At the same time, rotating cylinder 16 uses the reaction force of the airflow ejected from return hole 35 to rotate relative to fixed pipe 15, adjusting the orientation of return hole 35 so that the suction area corresponding to return hole 35 changes when nitrified liquid is returned next time. This avoids excessive extraction from the same area, which would result in a short nitrification time for the sewage in that area and a decrease in nitrified liquid concentration. It also improves the uniformity of nitrified liquid extraction position in contact oxidation tank 3 and ensures the concentration of nitrified liquid in the return.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mobile sewage treatment plant for water pollution control, comprising a chamber (12), an anaerobic tank (1), an anoxic tank (2), a contact oxidation tank (3), a sedimentation tank (4), a clear water tank (5), a self-priming pump (8), a filter (9), a sterilizer (10), and a blower unit (11), wherein the anaerobic tank (1), the anoxic tank (2), and the contact oxidation tank (3) are each equipped with a packing assembly (6), characterized in that, The anaerobic tank (1), anoxic tank (2), contact oxidation tank (3), sedimentation tank (4), and clear water tank (5) are connected to each other in sequence. The anaerobic tank (1) is equipped with a pneumatic stirring component, which is connected to a blower unit (11) through a pipe. The contact oxidation tank (3) is equipped with a microporous aeration component. The bottom of the sedimentation tank (4) is fixedly equipped with a reflux pump (7). The compartment (12) is equipped with a reflux stirring mechanism. Wastewater passes through an anaerobic tank (1), an anoxic tank (2), a contact oxidation tank (3), a sedimentation tank (4), and a clear water tank (5) in sequence. The treated clear water is then discharged through a filter (9) and a sterilizer (10) by a self-priming pump (8). A return pump (7) is used to return the sludge in the sedimentation tank (4) to the anaerobic tank (1). A return stirring mechanism is used to return the nitrified liquid in the contact oxidation tank (3) to the anoxic tank (2). The reflux stirring mechanism includes a first stirring pipe (23), which is fixedly connected to several second stirring pipes (24). Both the first stirring pipe (23) and the second stirring pipes (24) have spray holes (25) on their bodies. The reflux stirring mechanism can stir the water through the first stirring pipe (23) and the second stirring pipes (24) and spray out the nitrification liquid through the spray holes (25). The reflux stirring mechanism also includes a moving cylinder (17). A connecting pipe (14) is fixedly installed at the bottom of the anoxic pool (2). Several fixed pipes (15) are fixedly connected to one side of the connecting pipe (14). One end of the connecting pipe (14) is slidably sleeved with the moving cylinder (17). A sliding plug (18) is slidably installed inside the moving cylinder (17). A through hole is opened at the top of the side wall of the moving cylinder (17). A connecting hole (28) is opened at one end of the connecting pipe (14). The connecting pipe (14) is fixedly connected to the sliding plug (18). A first solenoid valve (19) is fixedly installed on the pipe body of the connecting pipe (14). The moving cylinder (17) can drive the first stirring pipe (23) to move. The top of the fixed tube (15) is provided with a rotating cylinder (16), and the cylinder wall of the rotating cylinder (16) is provided with a plurality of return holes (35). A filter screen is fixedly provided inside the hole wall of the return hole (35), and the number of the connecting holes (28) is at least one. A movable tube (20) is fixedly connected to one side of the bottom of the movable cylinder (17). One end of the movable tube (20) and the bottom of the movable cylinder (17) are both provided with a connecting hole (13). The two connecting holes (13) are connected to each other. One end of the movable tube (20) is connected to a movable tube (22). A one-way valve (21) is fixedly installed on the body of the movable tube (20). An electric push rod (27) is fixedly installed on one side of the anoxic pool (2). A connecting block (26) is fixedly connected to one side of the bottom of the movable cylinder (17). The movable tube (22) is fixedly connected to the first stirring tube (23). The nitrified liquid can flow unidirectionally from the moving cylinder (17) through the moving pipe (20) into the active pipe (22) via the one-way valve (21), and the output end of the electric push rod (27) is connected to the connecting block (26) for transmission.

2. The mobile sewage treatment plant for water pollution control according to claim 1, characterized in that, The anaerobic tank (1) is equipped with a grid inside. The input end of the self-priming pump (8) is connected to the clear water tank (5) through a pipe. The output end of the self-priming pump (8) is connected to the filter (9). The sterilizer (10) is connected to the filter (9). The return pump (7) is connected to the anaerobic tank (1) through a pipe.

3. The mobile sewage treatment plant for water pollution control according to claim 1, characterized in that, A fixed plate (29) is fixedly installed at the bottom of the compartment (12). An adjustment groove (30) is provided on the plate body of the fixed plate (29). The adjustment groove (30) is wavy and an adjustment rod (31) is slidably installed on the inner side. The adjustment rod (31) is fixedly connected to the fixed plate (29). The movable tube (22) is slidably sleeved with the moving tube (20).

4. A mobile sewage treatment plant for water pollution control according to claim 1, characterized in that, The bottom of the connecting pipe (14) is fixedly provided with an inner pipe (32), the inner pipe (32) is fixedly provided with a second solenoid valve (33), and the top of the inner pipe (32) is provided with a vent hole (34).

5. A mobile sewage treatment plant for water pollution control according to claim 4, characterized in that, The rotating cylinder (16) is rotatably connected to the fixed pipe (15), and the reflux hole (35) is inclined in the radial direction of the rotating cylinder (16).

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