Automatic treatment device for leachate of buried garbage station

Abstract

This utility model relates to the field of waste treatment technology and discloses an automatic treatment device for leachate from underground landfills. The device includes a housing, with a mixing tank fixedly connected inside the housing. A solid-liquid separator is fixedly connected to one side of the mixing tank, and an ultrafiltration tank is fixedly connected to one side of the solid-liquid separator. A stirring assembly is installed inside the mixing tank. The stirring assembly includes a polymerization hood, which is fixedly connected inside the mixing tank. A stirring shaft is rotatably connected inside the mixing tank. In this utility model, flocculant enters through a dosing pipe into a second annular water pipe and is sprayed into the inside of the polymerization hood through a second nozzle. Simultaneously, the output end of a motor drives the stirring shaft to rotate. The stirring shaft, through a conical barrel and stirring blades, thoroughly mixes the leachate and flocculant within the polymerization hood, achieving the effect of improving the treatment efficiency of the leachate and solving the problem of flocculant settling at the bottom and being difficult to mix evenly during mixing, thus improving the treatment efficiency of the leachate treatment device.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, and in particular to an automatic treatment device for leachate from underground waste stations. Background Technology

[0002] As a crucial facility in modern urban sanitation systems, underground landfills generate high-concentration organic wastewater—leachate—during their daily operation. This leachate contains a large amount of organic pollutants, ammonia nitrogen, heavy metal ions, and other harmful substances; its complex composition and high concentration mean that direct discharge without effective treatment will severely pollute the surrounding soil and groundwater resources. Therefore, on-site and efficient treatment of leachate is a key step in preventing secondary pollution and protecting the ecological environment. Among the physicochemical treatment processes for leachate, flocculation and sedimentation are widely used due to their simplicity and significant effectiveness; their core principle lies in achieving rapid and uniform mixing of reagents and wastewater.

[0003] Currently, some underground landfills are equipped with simple leachate treatment devices, whose mechanical structure typically includes an underground collection and reaction tank. During flocculation treatment, the technical principle is generally as follows: a dosing pump injects a flocculant solution into the leachate in the tank through a single inlet at the top of the reaction tank. To promote mixing, a basic mixer is installed inside the tank, such as a vertical motor driving a stirring shaft and a set of straight blades to rotate and agitate the liquid in the center of the tank. The purpose of this design is to mix the added reagent with the leachate in the tank through mechanical agitation, promoting the flocculation reaction of pollutants and forming flocs.

[0004] However, this traditional, simple dosing and mixing method has a serious drawback when treating high-concentration landfill leachate: the flocculant settles at the bottom and is difficult to mix evenly. Because landfill leachate has a high density and poor fluidity, flocculants (especially powdered or high-concentration liquid agents) will quickly sink due to gravity after being added from a single inlet. Simultaneously, the flow field created by simple central stirring is very limited, making it difficult to form a strong, three-dimensional turbulent circulation throughout the tank, especially at the bottom and corners. This results in a large amount of undispersed flocculant settling directly to the bottom, causing localized excessively high concentrations while most areas have insufficient concentrations—a phenomenon known as "stirring dead zones." This leads to incomplete flocculation, significantly reducing agent utilization and overall treatment efficiency. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an automatic treatment device for leachate from underground landfills, which aims to improve the problem that when leachate and flocculant are mixed, the flocculant settles at the bottom and is not easily mixed evenly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic treatment device for leachate from a buried landfill, comprising a shell, a mixing tank fixedly connected inside the shell, a solid-liquid separator fixedly connected to one side of the mixing tank, an ultrafiltration tank fixedly connected to one side of the solid-liquid separator, and a stirring assembly provided inside the mixing tank; The stirring assembly includes a polymerization hood, which is fixedly connected inside a mixing tank. A stirring shaft is rotatably connected inside the mixing tank. A conical barrel is fixedly connected to the outer wall of the stirring shaft, and stirring blades are fixedly connected to the outer wall of the stirring shaft. A flow guide groove is opened inside the polymerization hood, and a dosing assembly is installed inside the polymerization hood. A sealing cover is fixedly connected to the top of the mixing tank, and a driving assembly is installed on the top of the sealing cover. An annular water pipe is fixedly connected inside the mixing tank, and an inlet pipe is fixedly connected to the outer wall of the annular water pipe. A nozzle is fixedly connected to the outer wall of the annular water pipe.

[0007] As a further description of the above technical solution: The dosing assembly includes a second annular water pipe, the outer wall of which is fixedly connected to the inside of the polymer hood, a dosing pipe is fixedly connected to the outer wall of the second annular water pipe, and a second nozzle is fixedly connected to the outer wall of the second annular water pipe.

[0008] As a further description of the above technical solution: The drive assembly includes a motor, the outer wall of which is fixedly connected to the top of the sealing cover, and the output end of the motor is connected to one end of the stirring shaft.

[0009] As a further description of the above technical solution: A first support column is fixedly connected inside the shell, and a second support column is slidably connected inside the first support column.

[0010] As a further description of the above technical solution: A top cover is fixedly connected to the top of the second support column, and a rack is fixedly connected inside the second support column.

[0011] As a further description of the above technical solution: A second motor is fixedly connected to the outer wall of the first support column, and a worm gear is fixedly connected to the output end of the second motor.

[0012] As a further description of the above technical solution: The support column is rotatably connected to a shaft inside, a worm gear is fixedly connected to the outer wall of the shaft, and a gear is fixedly connected to the outer wall of the shaft.

[0013] As a further description of the above technical solution: The worm gear meshes with the outer wall of the worm, and the gear meshes with the outer wall of the rack.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the flocculant first enters the annular water pipe through the dosing pipe and is sprayed into the inside of the polymerization hood through the nozzle. At the same time, the output end of the motor drives the stirring shaft to rotate. The stirring shaft, through the cone and stirring blades, fully mixes the landfill leachate and flocculant in the polymerization hood, thereby improving the treatment efficiency of landfill leachate. This solves the problem that when leachate and flocculant are mixed, the flocculant settles at the bottom and is not easy to mix evenly, thus improving the treatment efficiency of the leachate treatment device. 2. In this utility model, the worm drives the rotating shaft to rotate through the worm wheel. When the rotating shaft rotates, it drives the gear to rotate synchronously. Then, the gear drives the second support column to extend out from the first support column through the rack. Subsequently, the second support column drives the top cover to lift up, which achieves the effect of easy maintenance and automatic opening of the cover. This solves the problem of the treatment device being difficult to maintain and repair when buried underground, and improves the convenience of the leachate treatment device. Attached Figure Description

[0015] Figure 1 This is a perspective view of an automatic leachate treatment device for underground landfills proposed in this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the shell of an automatic leachate treatment device for underground landfills proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the mixing tank of an automatic leachate treatment device for underground landfills proposed in this utility model.

[0018] Figure 4 This is a schematic diagram of the support column two of the automatic leachate treatment device for underground landfills proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the internal structure of a support column for an automatic leachate treatment device for underground landfills proposed in this utility model.

[0020] Legend: 1. Shell; 2. Top cover; 3. Mixing tank; 4. Solid-liquid separator; 5. Ultrafiltration tank; 6. Sealing cover; 7. Motor 1; 8. Stirring shaft; 9. Conical barrel; 10. Stirring blades; 11. Annular water pipe 1; 12. Liquid inlet pipe; 13. Nozzle 1; 14. Polymerization hood; 15. Guide channel; 16. Annular water pipe 2; 17. Nozzle 2; 18. Dosing pipe; 19. Support column 1; 20. Support column 2; 21. Motor 2; 22. Worm gear; 23. Rotating shaft; 24. Worm wheel; 25. Gear; 26. Rack. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-3 This utility model provides an embodiment of an automatic leachate treatment device for underground landfills, comprising a housing 1, which serves as the underground outer shell of the entire device and provides protection for the internal treatment unit. A mixing tank 3 is fixedly connected inside the housing 1, serving as the main reaction vessel for flocculation. A solid-liquid separator 4 is fixedly connected to one side of the mixing tank 3, which receives the mixed liquid and separates the generated flocculent solids from the water. An ultrafiltration tank 5 is fixedly connected to one side of the solid-liquid separator 4, which performs deep purification treatment on the liquid after solid-liquid separation. A stirring assembly is installed inside the mixing tank 3; this assembly is the core mechanism for achieving efficient and uniform mixing of leachate and reagents. The stirring assembly includes a polymerization shroud 14, which functions to create a localized, high-intensity mixing reaction zone within the mixing tank. The polymerization shroud 14 is fixedly connected inside the mixing tank 3, and its function is to fix this high-intensity mixing zone in a preset position. A stirring shaft 8 is rotatably connected inside the mixing tank 3, and its function is to serve as the central rotating component for transmitting power. A conical barrel 9 is fixedly connected to the outer wall of the stirring shaft 8, and its function is to generate a strong axial flow through rotation, pumping the material at the bottom upwards or pressing the material at the top downwards. Stirring blades 10 are fixedly connected to the outer wall of the stirring shaft 8, and their function is to provide radial flow and shear. The mixing tank 14 is equipped with a flow guide 15 to promote horizontal mixing and dispersion of materials. The flow guide 15 inside the mixing tank 14 guides the liquid inside the tank to generate a spiral flow, enhancing the mixing effect and preventing dredging. A dosing assembly is installed inside the mixing tank 14 to precisely add flocculant to the area of ​​most vigorous mixing. A sealing cap 6 is fixedly connected to the top of the mixing tank 3 to seal the tank and prevent odor leakage. A drive assembly is installed on the top of the sealing cap 6 to provide power to the entire mixing system. A ring-shaped water pipe 11 is fixedly connected inside the mixing tank 3 for infiltration. The annular water distribution pipe ensures uniform liquid inlet. An inlet pipe 12 is fixedly connected to the outer wall of the annular water distribution pipe 11, its function being to deliver the leachate to be treated to the annular water distribution pipe. A nozzle 13 is fixedly connected to the outer wall of the annular water distribution pipe 11, its function being to atomize or spray the incoming leachate at multiple points for preliminary dispersion. The dosing assembly includes an annular water distribution pipe 16, which acts as an annular dosing pipe for flocculants. The outer wall of the annular water distribution pipe 16 is fixedly connected inside the polymerization hood 14, its function being to ensure that the agent can be directly added to the core and most vigorous mixing area. The outer wall of the annular water distribution pipe 16 is fixed... The device is connected to a dosing pipe 18, which is used to deliver flocculant to the annular dosing pipe. A nozzle 17 is fixedly connected to the outer wall of the annular water pipe 16, which is used to inject the flocculant evenly into the leachate by spraying, so as to achieve instant dispersion and avoid the sedimentation of the agent. The drive component includes a motor 7, which is used as a power source to provide rotational power to the stirring shaft. The outer wall of the motor 7 is fixedly connected to the top of the sealing cover 6, which is used to securely install the motor on the equipment. The output end of the motor 7 is connected to one end of the stirring shaft 8, which is used to transmit the power of the motor to the stirring shaft and drive it to rotate. Reference Figure 4 and Figure 5Inside the housing 1, a support column 19 is fixedly connected, serving as the fixed outer cylinder and mounting base for the automatic opening mechanism. Inside the support column 19, a second support column 20 is slidably connected, acting as a retractable inner column for directly lifting the top cover. The top cover 2 is fixedly connected to the top of the second support column 20, transmitting the lifting mechanism's motion to the top cover to open and close it. Inside the second support column 20, a rack 26 is fixedly connected, serving as the linear motion component of the rack and pinion transmission system. A second motor 21 is fixedly connected to the outer wall of the support column 19, providing power for the automatic opening of the top cover. A worm gear 22 is fixedly connected to the output end of the second motor 21, acting as the driving component of the reduction transmission mechanism. The rotational motion of the motor is transmitted outwards. Inside the support column 19, there is a rotating shaft 23, which acts as a transmission shaft, transmitting power from the worm gear to the gear. The outer wall of the rotating shaft 23 is fixedly connected to the worm gear 24, which meshes with the worm to receive power and achieve a large transmission ratio reduction. The outer wall of the rotating shaft 23 is fixedly connected to the gear 25, which acts as the drive wheel of the gear and rack transmission system. The worm gear 24 meshes with the outer wall of the worm 22, forming a worm gear transmission to achieve speed reduction and torque increase. At the same time, its self-locking characteristic can prevent the top cover from falling accidentally when the power is off. The gear 25 meshes with the outer wall of the rack 26, which converts the rotational motion into linear motion. Through the rotation of the gear, the rack is precisely driven to move the support column 2 vertically up and down.

[0023] Working principle: When using this underground landfill leachate automatic treatment device, the shell 1 can be directly buried underground. The leachate is treated in the shell 1 through the mixing tank 3, solid-liquid separator 4, and ultrafiltration tank 5. First, the leachate enters the annular water pipe 11 through the inlet pipe 12, and then enters the mixing tank 3 through the nozzle 13. Then, the flocculant enters the annular water pipe 16 through the dosing pipe 18 and is sprayed into the polymerization hood 14 through the nozzle 17. At the same time, the output end of the motor 7 drives the stirring shaft 8 to rotate. The stirring shaft 8 fully mixes the leachate and flocculant in the polymerization hood 14 through the cone 9 and stirring blades 10. Then, the liquid can be guided by the guide channel 15 to increase the flow rate, thereby improving the mixing efficiency and preventing the problem of prolonged stirring time required to prevent the flocculant and leachate from diffusing. This achieves the effect of improving the treatment efficiency of landfill leachate. When maintenance is required on the equipment inside the housing 1, the output end of motor 21 drives worm gear 22 to rotate. Worm gear 22 drives shaft 23 to rotate through worm wheel 24. When shaft 23 rotates, it drives gear 25 to rotate synchronously. Then, gear 25 drives support column 20 to extend from support column 19 through rack 26. Subsequently, support column 20 drives top cover 2 to be lifted, making it easy to open housing 1 to maintain the equipment inside, thus achieving the effect of automatic opening for easy maintenance.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic device for treating leachate of a land fill station, comprising a casing (1), characterized in that: A mixing tank (3) is fixedly connected inside the shell (1), a solid-liquid separator (4) is fixedly connected to one side of the mixing tank (3), an ultrafiltration tank (5) is fixedly connected to one side of the solid-liquid separator (4), and a stirring assembly is provided inside the mixing tank (3). The stirring assembly includes a polymerization cover (14), which is fixedly connected inside the mixing tank (3). A stirring shaft (8) is rotatably connected inside the mixing tank (3). A cone barrel (9) is fixedly connected to the outer wall of the stirring shaft (8). A stirring blade (10) is fixedly connected to the outer wall of the stirring shaft (8). A guide groove (15) is opened inside the polymerization cover (14). A dosing assembly is provided inside the polymerization cover (14). A sealing cover (6) is fixedly connected to the top of the mixing tank (3). A driving assembly is provided on the top of the sealing cover (6). A ring-shaped water pipe (11) is fixedly connected inside the mixing tank (3). An inlet pipe (12) is fixedly connected to the outer wall of the ring-shaped water pipe (11). A nozzle (13) is fixedly connected to the outer wall of the ring-shaped water pipe (11).

2. The automatic leachate treatment device for a land-fill station according to claim 1, characterized in that: The dosing assembly includes a second annular water pipe (16), the outer wall of which is fixedly connected to the inside of the polymer cover (14), a dosing pipe (18) is fixedly connected to the outer wall of the second annular water pipe (16), and a second nozzle (17) is fixedly connected to the outer wall of the second annular water pipe (16).

3. The automatic leachate treatment device for a buried refuse station according to claim 1, characterized in that: The drive assembly includes a motor (7), the outer wall of which is fixedly connected to the top of the sealing cover (6), and the output end of the motor (7) is connected to one end of the stirring shaft (8).

4. The automatic leachate treatment device for underground landfills according to claim 1, characterized in that: The housing (1) is fixedly connected to a support column one (19), and the support column one (19) is slidably connected to a support column two (20).

5. The automatic leachate treatment device of a landfill station according to claim 4, characterized in that: The top of the second support column (20) is fixedly connected to a top cover (2), and a rack (26) is fixedly connected inside the second support column (20).

6. The automatic leachate treatment device of the buried refuse station according to claim 4, characterized in that: The outer wall of the support column (19) is fixedly connected to the motor (21), and the output end of the motor (21) is fixedly connected to the worm gear (22).

7. The automatic leachate treatment device of the buried refuse station according to claim 4, characterized in that: The support column (19) is rotatably connected to a rotating shaft (23), a worm gear (24) is fixedly connected to the outer wall of the rotating shaft (23), and a gear (25) is fixedly connected to the outer wall of the rotating shaft (23).

8. The automatic leachate treatment device of a landfill station according to claim 7, characterized in that: The worm wheel (24) meshes with the outer wall of the worm (22), and the gear (25) meshes with the outer wall of the rack (26).

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