A concrete sewage treatment tank

Abstract

The application discloses a concrete sewage treatment tank, comprising: a treatment tank, the treatment tank comprising an outer layer concrete tank and an inner layer concrete tank, a cavity being arranged between the outer layer concrete tank and the inner layer concrete tank, the cavity being used to reduce the influence of external temperature change on the inner layer concrete tank; the treatment tank being made of concrete and reinforcing material; the reinforcing material comprising cementitious material, polypropylene fiber and organic silicon waterproof agent, the proportion of the reinforcing material being 2%-5% of the cementitious material, 0.9%-1.2% of the polypropylene fiber and 3%-5% of the organic silicon waterproof agent; the cementitious material being used to fill the internal pores of the concrete; the polypropylene fiber being used to inhibit the generation of early shrinkage cracks of the concrete; and the organic silicon waterproof agent being used to form a hydrophobic film on the surface of the concrete. The application realizes the corrosion resistance and crack resistance of the reinforced concrete sewage treatment tank, optimizes the water flow distribution in the tank, improves the sewage treatment efficiency, facilitates sludge cleaning and reduces the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a concrete wastewater treatment tank. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscaping, medical care, and catering. Concrete wastewater treatment ponds are widely used in wastewater treatment projects.

[0003] Currently, concrete wastewater treatment tanks consist of a U-shaped tank body made of concrete, with a sludge suction pipe on one side connected to the bottom of the tank. The tank body contains inclined baffles, effectively treating domestic and industrial wastewater and improving water quality. While these tanks are easy to construct and effectively reduce energy consumption, they still have the following shortcomings: 1. Concrete itself is susceptible to corrosion from acidic and alkaline substances in sewage and damage from freeze-thaw cycles, which can lead to cracks and spalling in the tank structure, affecting its service life and sewage treatment effect. 2. Uneven water flow distribution within the pool, with dead zones, prevents wastewater from fully reacting and being treated, thus reducing wastewater treatment efficiency; 3. The sludge in the sewage treatment pond is difficult to clean, which can easily lead to sludge accumulation and further affect the treatment capacity. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a concrete sewage treatment tank that enhances the corrosion and crack resistance of the concrete sewage treatment tank, optimizes the water flow distribution within the tank, improves sewage treatment efficiency, and facilitates sludge cleaning while reducing maintenance costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a concrete sewage treatment tank, comprising: The treatment tank includes an outer concrete tank and an inner concrete tank, with a cavity between the outer concrete tank and the inner concrete tank to reduce the impact of external temperature changes on the inner concrete tank. The bottom of the treatment pool is funnel-shaped, and a collection pipe is provided at the bottom of the treatment pool; Multiple baffles are installed in the inner concrete tank in a staggered arrangement to change the direction of sewage flow and promote water mixing. The aeration section is located inside the inner concrete tank and is used to generate microbubbles, increasing the contact area between the bubbles and the wastewater. The cleaning section is located inside the inner concrete tank and at the bottom of the aeration section. It is used to clean the funnel-shaped slope at the bottom of the inner concrete tank. The sludge cleaning component is located at the bottom of the cleaning section and is used to discharge the sludge from the inside of the inner concrete tank. The treatment tank is made of concrete and reinforcing materials; The reinforcing material includes cementitious materials, polypropylene fibers, and silicone waterproofing agents, with the following proportions: cementitious materials 2%-5%, polypropylene fibers 0.9%-1.2%, and silicone waterproofing agents 3%-5%. The cementitious material is used to fill the internal pores of the concrete; The polypropylene fibers are used to inhibit the formation of early shrinkage cracks in concrete. The organosilicon waterproofing agent is used to form a hydrophobic film on the concrete surface; The cleaning unit includes a cleaning inclined rod and a rotating pipe installed at the bottom of the inner concrete pool. The cleaning inclined rod is provided with a connecting rod for connecting the rotating pipe, and the rotating pipe is provided with a connecting pipe for connecting the cleaning inclined rod and the rotating pipe. It also includes a cleaning vertical rod installed in the collection pipe at the bottom of the inner concrete pool. The cleaning vertical rod is provided with a fixed pipe for connecting the rotating pipe. The cleaning inclined rod and the cleaning vertical rod are provided with an inclined surface on the side near the inner concrete pool, and a fixing hole is opened on the inclined surface. It also includes a drive unit installed at the bottom of the outer concrete pool to drive the cleaning diagonal rods and cleaning vertical rods to clean the bottom of the inner concrete pool; Both the cleaning inclined rod and the cleaning vertical rod have cavities inside for conveying sludge; The cleaning vertical bar is L-shaped; The sludge cleaning assembly includes a drain pipe, an electric gate valve, and a sludge pump. The sludge pump is used to promptly discharge sludge from the cleaning section and the bottom of the inner concrete tank. The electric gate valve is used to control the opening and closing of the drain pipe. The drain pipe is rotatably connected to the rotating pipe.

[0006] Furthermore, the treatment pool also includes a tie rod disposed in the cavity to connect the outer concrete pool and the inner concrete pool. Both the outer and inner concrete pools are provided with tie rods to ensure the integrity of the outer and inner concrete pools.

[0007] Furthermore, the aeration section includes a pipe and a support block. The support block is disposed on the side wall of the outer concrete tank to support the pipe, and the pipe is provided with multiple aeration heads. It also includes an air inlet pipe that extends from the pipeline to the outside of the treatment tank.

[0008] Furthermore, the pipeline includes a first annular pipe disposed on the support block and a second annular pipe disposed in the middle of the outer concrete pool. The first annular pipe is provided with a plurality of connecting pipes for connecting to the second annular pipe, thereby increasing the aeration area in the inner concrete pool.

[0009] Furthermore, the drive unit includes a driven gear, a driving gear, and a drive unit disposed on the rotating tube; The drive unit is used to drive the drive gear and the driven gear to rotate, and the top of the drive unit is fixedly connected to the bottom cover plate of the outer concrete pool.

[0010] Furthermore, it also includes an inlet pipe, which is installed at the top of the inner concrete tank to inject sewage into the inner concrete tank. It also includes a drainage pipe installed on the inner concrete pool to drain the purified water inside the inner concrete pool.

[0011] The beneficial effects of this invention are reflected in: 1. This invention utilizes a double-layer hollow structure consisting of an outer concrete pool and an inner concrete pool. An air insulation layer is installed inside the cavity of the outer and inner concrete pools, which effectively reduces the impact of temperature stress on the pool body and reduces the risk of concrete cracking. The funnel-shaped design of the bottom of the outer concrete pool, in conjunction with the sludge collection hopper, facilitates sludge sedimentation and cleaning, thus optimizing the pool structure.

[0012] 2. This invention involves adding cementitious materials, polypropylene fibers, and organosilicon waterproofing agents to the concrete used to construct the outer and inner concrete tanks. The cementitious materials fill the internal pores of the concrete, the polypropylene fibers inhibit the formation of early shrinkage cracks in the concrete, and the organosilicon waterproofing agent forms a hydrophobic film on the concrete surface. Through the synergistic effect of multiple materials, the strength, impermeability, and corrosion resistance of the concrete are significantly improved, thereby enhancing the durability of the sewage treatment tank from a material perspective.

[0013] 3. This invention, by setting a guide plate inside the inner concrete tank, changes the direction of sewage flow, promotes water mixing, eliminates dead zones, and ensures uniform distribution of sewage within the tank, thus improving treatment efficiency. Then, by setting an aeration unit inside the inner concrete tank, external gas enters the pipeline through the air inlet pipe, and the gas enters the aeration head through the first annular pipe, the second annular pipe, and the connecting pipe. The aeration head generates microbubbles, increasing the contact area between the bubbles and the sewage, improving oxygen utilization, and enhancing sewage treatment efficiency. Finally, the drive unit on the cleaning unit rotates the rotating pipe, and the cleaning vertical rods and inclined rods on the rotating pipe clean the bottom of the inner concrete tank. Sludge is also discharged from the cleaning unit and the inner concrete tank through the sludge cleaning component, improving sewage treatment efficiency and reducing maintenance costs. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a perspective view of the aeration section of the present invention; Figure 4 This is a perspective view of the cleaning section and sludge cleaning assembly of the present invention; Figure 5 This is a left view of the cleaning diagonal bar and the cleaning vertical bar of the present invention; Figure 6 This is a cross-sectional view of the cleaning diagonal bar according to the present invention.

[0015] In the picture: 1. Treatment tank; 11. Outer concrete tank; 12. Inner concrete tank; 13. Tie rod; 2. Deflector plate; 3. Aeration section; 31. Pipe; 311. First annular pipe; 312. Connecting pipe; 313. Second annular pipe; 32. Support block; 33. Aeration head; 34. Air inlet pipe; 4. Cleaning section; 41. Cleaning diagonal bar; 42. Rotating pipe; 43. Cleaning vertical bar; 44. Fixing pipe; 45. Drive section; 451. Driven gear; 452. Drive unit; 46. Connecting pipe; 5. Sludge cleaning components; 6. Inlet pipe. Detailed Implementation

[0016] 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0017] Please see Figure 1-6 This invention discloses a concrete wastewater treatment tank, comprising: Treatment tank 1 includes an outer concrete tank 11 and an inner concrete tank 12. A cavity is provided between the outer concrete tank 11 and the inner concrete tank 12. The cavity is an air insulation layer. The bottom of the outer concrete tank 11 is funnel-shaped. The bottom slope of both the outer concrete tank 11 and the inner concrete tank 12 is 15°-20°, which is conducive to the natural sedimentation of sludge and its collection into the sludge collection pipe for easy subsequent cleaning. The bottom of the treatment tank 1 is funnel-shaped and a collection pipe is provided at the bottom. The cavity is used to reduce the impact of external temperature changes on the inner concrete tank 12. The thickness of the outer concrete tank 11 is 200mm and the thickness of the cavity is 50mm. Multiple guide plates 2 are installed inside the inner concrete tank 12 in a staggered arrangement to change the direction of sewage flow and promote water mixing. The guide plates 2 are fixedly installed to the inner concrete tank 12 and are fixedly connected to the tank wall of the inner concrete tank 12 by pre-embedded bolts. The guide plates 2 are arc-shaped with an arc of 120°-150° and a spacing of 2m-3m. The guide plates 2 eliminate dead zones in the water flow, so that the sewage is evenly distributed in the tank and improves the treatment effect. Aeration section 3 is fixedly installed inside the inner concrete tank 12 to generate microbubbles, increase the contact area between the bubbles and the sewage, improve oxygen utilization, and enhance the sewage treatment effect. The cleaning unit 4 is rotatably installed inside the inner concrete tank 12 and located at the bottom of the aeration unit 3. It is used to clean the funnel-shaped slope at the bottom of the inner concrete tank 12 to prevent sludge from adhering to the bottom of the inner concrete tank 12. The sludge cleaning component 5 is located at the bottom of the cleaning section 4 and is used to discharge the sludge inside the inner concrete pool 12. It can discharge the sludge in the sludge collection pipe in a timely manner, making it convenient for cleaning. The cleaning unit 4 includes a cleaning inclined rod 41 and a rotating pipe 42 installed at the bottom of the inner concrete tank 12. The cleaning inclined rod 41 is provided with a connecting rod for connecting the rotating pipe 42, and the rotating pipe 42 is provided with a connecting pipe 46 for connecting the cleaning inclined rod 41 and the rotating pipe 42. Sludge enters the rotating pipe 42 through the cleaning inclined rod 41 and is discharged. The cleaning inclined rod 41 prevents sludge from adhering to the bottom wall of the inner concrete tank 12. It also includes a cleaning vertical rod 43 installed in the collection pipe at the bottom of the inner concrete pool 12. The cleaning vertical rod 43 is provided with a fixing pipe 44 for connecting the rotating pipe 42. The cleaning inclined rod 41 and the cleaning vertical rod 43 are provided with an inclined slope on the side near the inner concrete pool 12, and a fixing hole is opened on the inclined slope to prevent sludge from adhering to the inner wall of the collection pipe on the outer concrete pool 11. The inclined slope is used to discharge the sludge on both sides of the cleaning inclined rod 41 and the cleaning vertical rod 43, and the fixing hole is used to discharge the sludge. It also includes a drive unit 45 located at the bottom of the outer concrete pool 11, which drives the cleaning inclined rod 41 and the cleaning vertical rod 43 to clean the bottom of the inner concrete pool 12. The drive unit 45 is used to drive the rotating pipe 42 to rotate. Both the cleaning inclined rod 41 and the cleaning vertical rod 43 have cavities inside for conveying sludge. After the sludge is discharged, the cleaning inclined rod 41 and the cleaning vertical rod 43 rotate to clean the bottom wall of the inner concrete pool 12 and the inner wall of the collection pipe. The cleaning vertical rod 43 is provided with a fixing hole. The cleaning vertical rod 43 is L-shaped and is used to clean the bottom cover plate of the collection pipe on the outer concrete pool 11. The sludge cleaning assembly 5 includes a sludge discharge pipe, an electric gate valve, and a sludge pump. The sludge pump is used to promptly discharge the sludge from the bottom of the cleaning section 4 and the inner concrete tank 12. The electric gate valve is used to control the opening and closing of the sludge discharge pipe. The sludge discharge pipe and the rotating pipe 42 are rotatably mounted. The rotating pipe 42 rotates on the sludge discharge pipe. The sludge discharge pipe and the rotating pipe 42 are fixedly installed by rollers.

[0018] In a specific embodiment, the treatment pool 1 further includes a tie rod 13 disposed in the cavity to connect the outer concrete pool 11 and the inner concrete pool 12. Tie rods are provided in both the outer concrete pool 11 and the inner concrete pool 12 to ensure the integrity of the outer concrete pool 11 and the inner concrete pool 12. The tie rod 13 and the tie rod are made of HRB400 steel bars with a diameter of 12mm and a spacing of 400mm x 400mm to ensure the integrity of the double-layer structure. The tie rod 13 and the tie rod are installed by welding or by tying with wire.

[0019] In Example 1, the treatment tank 1 is made of concrete and reinforcing materials; Concrete consists of cement, sand, and aggregate; The reinforcing materials include cementitious materials, polypropylene fibers, and silicone waterproofing agents, with a ratio of 2% cementitious materials, 1.2% polypropylene fibers, and 3% silicone waterproofing agents. Cementitious materials are used to fill the internal pores of concrete. The gel material is nano-silica particles with a particle size of 10-50 nanometers. The dosage is 2% by mass. It can fill the internal pores of concrete, improve the density and strength of concrete, and has the ability to form gel through hydration reaction and harden. Polypropylene fibers are used to inhibit the formation of early shrinkage cracks in concrete. The length of the polypropylene fibers is 12-18mm, and the dosage is 1.2kg per cubic meter. It can effectively inhibit the formation of early shrinkage cracks in concrete. Organosilicon waterproofing agents are used to form a hydrophobic film on the concrete surface. The dosage of organosilicon waterproofing agent is 3% of the water content of the concrete. It can form a hydrophobic film on the concrete surface, enhancing the impermeability and corrosion resistance of the concrete.

[0020] In Example 2, the treatment tank 1 is made of concrete and reinforcing materials; Concrete consists of cement, sand, and aggregate; The reinforcing materials include cementitious materials, polypropylene fibers, and silicone waterproofing agents, with a ratio of 5% cementitious materials, 0.9% polypropylene fibers, and 5% silicone waterproofing agents. Cementitious materials are used to fill the internal pores of concrete. The gel material is nano-silica particles with a particle size of 10-50 nanometers. The dosage is 5% by mass. It can fill the internal pores of concrete, improve the density and strength of concrete, and has the ability to form gel through hydration reaction and harden. Polypropylene fibers are used to inhibit the formation of early shrinkage cracks in concrete. The length of the polypropylene fibers is 12-18mm, and the dosage is 0.9kg per cubic meter. They can effectively inhibit the formation of early shrinkage cracks in concrete. Organosilicon waterproofing agents are used to form a hydrophobic film on the concrete surface. The dosage of organosilicon waterproofing agent is 5% of the water content of the concrete. It can form a hydrophobic film on the concrete surface, enhancing the impermeability and corrosion resistance of the concrete.

[0021] In Example 3, the treatment tank 1 is made of concrete and reinforcing materials; Concrete consists of cement, sand, and aggregate; The reinforcing materials include cementitious materials, polypropylene fibers, and silicone waterproofing agents, with a ratio of 3% cementitious materials, 1% polypropylene fibers, and 4% silicone waterproofing agents. Cementitious materials are used to fill the internal pores of concrete. The gel material is nano-silica particles with a particle size of 10-50 nanometers. The dosage is 3% by mass. It can fill the internal pores of concrete, improve the density and strength of concrete, and has the ability to form gel through hydration reaction and harden. Polypropylene fibers are used to inhibit the formation of early shrinkage cracks in concrete. The length of the polypropylene fibers is 12-18mm, and the dosage is 1kg per cubic meter. It can effectively inhibit the formation of early shrinkage cracks in concrete. Organosilicon waterproofing agents are used to form a hydrophobic film on the concrete surface. The dosage of organosilicon waterproofing agent is 4% of the water content of the concrete. It can form a hydrophobic film on the concrete surface, enhancing the impermeability and corrosion resistance of the concrete.

[0022] When using it, add cement, sand, stone, nano silica particles and polypropylene fiber to the mixer in sequence, dry mix for 2-3 minutes to make the materials evenly mixed, then add organosilicon waterproofing agent and water, wet mix for 3-5 minutes to prepare modified concrete. First, treat the foundation of the pool bottom to ensure the bearing capacity of the foundation. Then, tie the steel mesh or tie rod 13 at the bottom of the pool and fix the steel mesh to the bottom of the pool. Next, pour the modified concrete according to the funnel-shaped slope and use a plate vibrator to compact it. After the pouring is completed, carry out curing. During the curing period, control the surface flatness error to not exceed 5mm. First, tie the steel bars or tie rods of the pool wall and install the inner and outer layers of steel bars or tie rods; then install the formwork, using steel formwork to ensure the flatness and sealing of the formwork; then pour the modified concrete in layers, with the outer concrete pool 11 and the inner concrete pool both having a thickness of 200mm, and use an immersion vibrator to compact it; after pouring, cure it in time, and the curing time shall not be less than 14 days.

[0023] In a specific embodiment, the aeration unit 3 includes a pipe 31 and a support block 32. The support block 32 is preset inside the inner concrete pool 12 and is set on the side wall of the inner concrete pool 12 to support the pipe 31. The support block 32 and the pipe 31 are fixedly installed by U-shaped buckles and bolts. The pipe 31 is provided with multiple aeration heads 33. The pipe 31 is set at a distance of 300mm from the bottom of the outer concrete pool 11 to ensure the flatness of the pipe 31. It also includes an air inlet pipe 34 that extends from the pipe 31 to the outside of the treatment tank 1, for injecting gas into the pipe 31. The pipe 31 is made of UPVC material with a diameter of 50mm and is evenly distributed above the bottom of the tank. The aeration head 33 is made of silicone rubber, is disc-shaped, and has a diameter of 200mm. Each aeration head has 200-300 micropores.

[0024] In one embodiment, the pipe 31 includes a first annular pipe 311 disposed on the support block 32 and a second annular pipe 313 disposed in the middle of the outer concrete pool 11. The first annular pipe 311 is provided with a plurality of connecting pipes 312 for connecting the second annular pipe 313 to increase the aeration area in the inner concrete pool 12. The diameter of the first annular pipe 311 is three times the diameter of the second annular pipe 313, and the inner diameter of the first annular pipe 311 is the same as the inner diameter of the second annular pipe 313. The aeration head 33 has an opening diameter of 0.5-1mm.

[0025] In a specific embodiment, the drive unit 45 includes a driven gear 451, a driving gear, and a drive unit 452 disposed on the rotating tube 42; The drive unit 452 is used to drive the active gear and the driven gear 451 to rotate. The top of the drive unit 452 is fixedly connected to the bottom cover plate of the outer concrete pool 11. The drive unit 452 is an electric motor. The drive unit 452 is used to drive the active gear and the driven gear 451 to rotate, thereby driving the cleaning inclined rod 41 and the cleaning vertical rod 43 to rotate.

[0026] In a specific embodiment, an inlet pipe 6 is also included, which is set at the top of the outer concrete tank 11 to inject sewage into the inner concrete tank 12. An electric control valve is provided on the inlet pipe 6 to control the opening and closing of the inlet pipe 6 and control the amount of sewage entering the outer concrete tank 11. It also includes a drain pipe installed on the inner concrete pool 12 to drain the purified water inside the inner concrete pool 12. An electric control valve is installed in the drain pipe to control the opening and closing of the drain pipe.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Additionally, "multiple" refers to two or more.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete sewage treatment tank, characterized in that, include: The treatment tank (1) includes an outer concrete tank (11) and an inner concrete tank (12). A cavity is provided between the outer concrete tank (11) and the inner concrete tank (12) to reduce the impact of external temperature changes on the inner concrete tank (12). The bottom of the treatment tank (1) is funnel-shaped, and a collection pipe is provided at the bottom of the treatment tank (1); Multiple baffles (2) are installed in the inner concrete tank (12) in an alternating pattern to change the direction of sewage flow and promote water mixing. The aeration section (3) is installed inside the inner concrete tank (12) to generate microbubbles and increase the contact area between the bubbles and the sewage. The cleaning section (4) is located inside the inner concrete tank (12) and at the bottom of the aeration section (3) for cleaning the funnel slope at the bottom of the inner concrete tank (12). The sludge cleaning component (5) is located at the bottom of the cleaning section (4) to discharge the sludge inside the inner concrete tank (12); The treatment tank (1) is made of concrete and reinforcing materials; The reinforcing material includes cementitious materials, polypropylene fibers, and silicone waterproofing agents, with the following proportions: cementitious materials 2%-5%, polypropylene fibers 0.9%-1.2%, and silicone waterproofing agents 3%-5%. The cementitious material is used to fill the internal pores of the concrete; The polypropylene fibers are used to inhibit the formation of early shrinkage cracks in concrete. The organosilicon waterproofing agent is used to form a hydrophobic film on the concrete surface; The cleaning section (4) includes a cleaning inclined rod (41) and a rotating pipe (42) disposed at the bottom of the inner concrete pool (12). The cleaning inclined rod (41) is provided with a connecting rod for connecting the rotating pipe (42), and the rotating pipe (42) is provided with a connecting pipe (46) for connecting the cleaning inclined rod (41) and the rotating pipe (42). It also includes a cleaning vertical rod (43) installed in the collection pipe at the bottom of the inner concrete pool (12). The cleaning vertical rod (43) is provided with a fixing pipe (44) for connecting the rotating pipe (42). The cleaning inclined rod (41) and the cleaning vertical rod (43) are provided with an inclined slope on the side close to the inner concrete pool (12), and a fixing hole is provided on the inclined slope. It also includes a drive unit (45) located at the bottom of the outer concrete pool (11) to drive the cleaning diagonal bar (41) and the cleaning vertical bar (43) to clean the bottom of the inner concrete pool (12); Both the cleaning inclined rod (41) and the cleaning vertical rod (43) have cavities inside for conveying sludge; The cleaning vertical rod (43) is L-shaped; The sludge cleaning assembly (5) includes a drain pipe, an electric gate valve, and a sludge pump. The sludge pump is used to promptly discharge the sludge from the bottom of the cleaning section (4) and the inner concrete tank (12). The electric gate valve is used to control the opening and closing of the drain pipe. The drain pipe and the rotating pipe (42) are rotatably connected.

2. The concrete sewage treatment tank according to claim 1, characterized in that: The treatment pool (1) also includes a tie rod (13) installed in the cavity to connect the outer concrete pool (11) and the inner concrete pool (12). Both the outer concrete pool (11) and the inner concrete pool (12) are provided with tie rods to ensure the integrity of the outer concrete pool (11) and the inner concrete pool (12).

3. The concrete sewage treatment tank according to claim 1, characterized in that: The aeration section (3) includes a pipe (31) and a support block (32). The support block (32) is set on the side wall of the outer concrete pool (11) to support the pipe (31). The pipe (31) is provided with multiple aeration heads (33). It also includes an air inlet pipe (34) that extends from the pipe (31) to the outside of the treatment tank (1).

4. The concrete sewage treatment tank according to claim 3, characterized in that: The pipe (31) includes a first annular pipe (311) set on the support block (32) and a second annular pipe (313) set in the middle of the outer concrete pool (11). The first annular pipe (311) is provided with a plurality of connecting pipes (312) for connecting the second annular pipe (313) to increase the aeration area in the inner concrete pool (12).

5. The concrete sewage treatment tank according to claim 1, characterized in that: The drive unit (45) includes a driven gear (451), a driving gear and a drive unit (452) disposed on the rotating tube (42). The drive unit (452) is used to drive the active gear and the driven gear (451) to rotate. The top of the drive unit (452) is fixedly connected to the bottom cover plate of the outer concrete pool (11).

6. The concrete sewage treatment tank according to claim 1, characterized in that: It also includes an inlet pipe (6), which is set at the top of the inner concrete tank (12) to inject sewage into the inner concrete tank (12); It also includes a drain pipe installed on the inner concrete pool (12) to drain the purified water inside the inner concrete pool (12).

Images