A leachate collection and treatment device

Abstract

This invention discloses a landfill leachate collection and treatment device, relating to the field of wastewater treatment technology. The invention's drive mechanism, through gear meshing, drives an aeration mechanism to rotate, causing a rotating ring to rotate around the outer wall of filter plate B. This causes the bottom end of the decanting pipe to rotate with the rotating ring, while the top end, restricted by a fixed ring sliding hole, moves horizontally, changing the tilt angle and top height to form a dynamic decanting structure, achieving multi-layered collection of landfill leachate. When the decanting pipe rotates and gathers, impurities are concentrated, and the aeration mechanism aerates the pipe, with the gas rising along the tilted decanting pipe, enhancing the contact between organic matter and microorganisms and dissolved oxygen. When the decanting pipe rotates and disperses, impurities are dispersed, and dissolved oxygen is evenly distributed. This invention, through the linkage control of the decanting and aeration processes by the drive mechanism, solves the problems of insufficient decanting flexibility, inability to achieve multi-layered collection, and low aeration efficiency in traditional devices. It achieves selective collection of different water layers and uniform distribution of dissolved oxygen, improving the treatment quality and efficiency of landfill leachate.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a landfill leachate collection and treatment device. Background Technology

[0002] Landfill leachate is a highly polluting wastewater generated during the dumping, landfilling, or treatment of waste. Its composition is complex, containing high concentrations of organic matter, ammonia nitrogen, heavy metals, and a large amount of suspended solids. If discharged directly without effective treatment, it will cause serious pollution to the surrounding soil, water bodies, and atmosphere, threatening ecological balance and human health.

[0003] Most decanting systems are fixed in design, lacking flexibility and unable to adapt to changes in leachate level and quality. In practical applications, leachate levels fluctuate frequently, and fixed decanting systems cannot precisely control the collection height, easily leading to the inclusion of large amounts of bottom sediment or suspended solids in the collected leachate. This severely affects subsequent treatment effectiveness and increases treatment costs and complexity. Some decanting systems achieve decanting by following liquid buoyancy, which can adapt to water level changes to some extent, but can only collect the top layer of clarified leachate. However, the quality of landfill leachate varies vertically, and the top layer leachate is not always the most suitable for collection and treatment. The inability to achieve multi-layered collection of top leachate limits the optimal selection of leachate quality and makes it difficult to meet the complex and ever-changing leachate treatment needs.

[0004] In the aeration process, traditional aeration methods have revealed numerous drawbacks when treating landfill leachate. Due to the high impurity content and concentration in landfill leachate, bubbles generated by traditional aeration methods are easily obstructed and interfered with by impurities during their ascent, resulting in uneven floating. This leads to uneven distribution of dissolved oxygen within the aeration area, with some areas having excessively high dissolved oxygen levels, resulting in energy waste, while other areas have insufficient dissolved oxygen levels, affecting the activity and metabolic efficiency of aerobic microorganisms. Consequently, pollutant degradation is incomplete, aeration efficiency is extremely poor, and this ultimately affects the stable operation and treatment effect of the entire landfill leachate treatment system. Therefore, we propose a landfill leachate collection and treatment device. Summary of the Invention

[0005] The purpose of this invention is to provide a landfill leachate collection and treatment device to solve the technical problem of poor treatment effect of existing landfill leachate treatment.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a landfill leachate collection and treatment device, comprising a sedimentation tank, a cover plate at the top of the sedimentation tank, a fixed central rod inserted at the center of the sedimentation tank, a filter plate A fixedly sleeved at the top of the fixed central rod, a fixed ring sleeved on the outer wall of the filter plate, a filter plate B sleeved at the bottom of the sedimentation tank, a rotating ring rotatably sleeved on the outer wall of the filter plate B, a decanting pipe rotatably inserted in a ring at equal intervals on the rotating ring, the end of the decanting pipe away from the rotating ring being movably inserted on the fixed ring, an aeration mechanism fixedly connected to the bottom of the rotating ring, a base frame rotatably connected to the bottom of the aeration mechanism, and a driving mechanism provided on the base frame;

[0007] The drive mechanism engages and drives the aeration mechanism to rotate, which in turn drives the rotating ring to rotate, causing several sets of decanting pipes to rotate. The decanting pipes are movably inserted into one end of the fixed ring and rise or fall horizontally to form a dynamic decanting structure, thereby realizing multi-layered collection of landfill leachate.

[0008] Several sets of decanting pipes rotate and converge to form a concentrated state of impurities. At this time, aeration is carried out through the aeration mechanism. The gas rises along the inclined decanting pipes, which enhances the contact between organic matter and microorganisms in the leachate in the sedimentation tank and dissolved oxygen. The several sets of decanting pipes rotate and disperse to form a dispersed state of impurities, and the dissolved oxygen is evenly distributed.

[0009] Preferably, the fixing ring has sliding holes at equal intervals in a ring shape, and the top end of the decanting pipe is movably inserted into the sliding holes.

[0010] Preferably, the rotating ring has rotating grooves at equal intervals in a ring shape, the bottom end of the decanting pipe is rotatably inserted into the rotating grooves, the rotating ring has through grooves at equal intervals in a ring shape inside, and several rotating grooves are connected through the through grooves. The outer wall of the rotating ring has a water outlet hole, and the water outlet hole is connected to one of the rotating grooves.

[0011] Preferably, the decanting pipe includes a pipe body, a decanting outlet, a ball head, and a clear liquid chamber. The ball head is rotatably inserted into the rotating groove, the pipe body is fixedly connected to the ball head, the decanting outlet is located at the end of the pipe body away from the ball head, the clear liquid chamber is located inside the pipe body, and the pipe body, the decanting outlet, and the ball head are connected internally.

[0012] Preferably, the aeration mechanism includes a rotating frame, a linkage gear, an internal gear, and an aeration assembly. The rotating frame is rotatably mounted on the base frame, and its outer wall is meshed with the output end of the drive mechanism. The linkage gear is rotatably mounted on the rotating frame. The internal gears are rotatably inserted into the base frame in a ring with equal intervals. One of the internal gears passes through the base frame and is connected to a motor. The aeration assembly is slidably inserted into the rotating frame in a ring with equal intervals. The linkage gear meshes with several of the internal gears, and the top of each internal gear meshes with the aeration assembly.

[0013] Preferably, the bottom end of the rotating frame is provided with a swivel groove, the linkage gear is rotatably connected to the swivel groove, the top end of the rotating frame is provided with a ring-shaped sliding groove at equal intervals, the aeration component is slidably inserted into the sliding groove, and the bottom end of the outer wall of the rotating frame is provided with an external tooth groove, which is meshed with the output end of the drive mechanism.

[0014] Preferably, the aeration assembly includes a rack and an aeration block. The rack is slidably inserted into the groove, the aeration block is fixedly disposed on the top of the rack, the output end of the aeration block is movably disposed at the bottom of the sedimentation tank, and the input end of the aeration block is connected to the air supply mechanism through a hose.

[0015] Preferably, the aeration block has an air chamber inside, one end of the aeration block has an air inlet, and the top surface of the other end of the aeration block has an air outlet. The air supply mechanism inputs gas into the air inlet through a hose, and discharges it through the air chamber and the air outlet.

[0016] Preferably, a plurality of friction rollers are rotatably provided at the top of the aeration block near the air outlet. The top of the friction rollers contacts the bottom of the filter plate B. The motor drives one of the internal gears to rotate. The internal gear meshes with the linkage gear to rotate. The linkage gear drives a plurality of internal gears to rotate synchronously. The internal gears mesh with the rack to move the aeration block. The movement of the aeration block causes the friction rollers to rub against the filter plate B.

[0017] Preferably, the base frame has a through hole at the center of the axis, the fixing rod is inserted into the through hole, and the bottom end of the base frame is also provided with a sludge discharge pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The driving mechanism of this invention drives the aeration mechanism to rotate through gear meshing, which in turn drives the rotating ring to rotate around the outer wall of the filter plate B. This causes the bottom end of the decanting pipe to rotate with the rotating ring, while the top end is restricted to move horizontally by the fixed ring sliding hole, changing the tilt angle and the height of the top end, thus forming a dynamic decanting structure and realizing multi-layered collection of landfill leachate.

[0020] 2. This invention also utilizes the principle that when the decanting pipe rotates and gathers impurities, a concentrated state is formed, and the aeration mechanism aerates the water. The gas rises along the inclined decanting pipe, enhancing the contact between organic matter and microorganisms and dissolved oxygen. When the decanting pipe rotates and disperses, the impurities are dispersed, resulting in a uniform distribution of dissolved oxygen. This invention solves the problems of insufficient decanting flexibility, inability to perform multi-layer collection, and low aeration efficiency in traditional devices by controlling the decanting and aeration processes through a drive mechanism. It achieves selective collection of different water layers and uniform distribution of dissolved oxygen, improving the treatment quality and efficiency of landfill leachate.

[0021] 3. In this invention, the aeration component forms a sliding connection structure between the rack and the sliding groove of the rotating frame. When the internal gear rotates, its top tooth surface meshes with the rack, driving the rack to slide radially along the sliding groove, thereby causing the aeration block fixed to the top of the rack to move synchronously. The air supply mechanism delivers gas to the input end of the aeration block through a hose, and the gas is released from the output end through the internal flow channel of the aeration block, forming bubbles at the bottom of the sedimentation tank, thus achieving aeration treatment of the leachate. The aeration block can dynamically adjust its aeration position as the rack slides, and in conjunction with the rotation of the rotating frame, achieves aeration coverage and uniform air distribution throughout the entire tank.

[0022] 4. In this invention, since several sets of friction rollers are provided at the top of the aeration block near the air outlet, and the top of the friction rollers are in contact with the bottom of the filter plate B, the friction rollers roll along with the aeration block during its movement. By generating relative friction with the bottom surface of the filter plate B, they continuously scrape the impurities and sludge attached to the bottom surface of the filter plate B, thereby achieving automatic cleaning of the filter plate B. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall external structure of the present invention.

[0024] Figure 2 This is a cross-sectional front view of the internal structure of the sedimentation tank of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the sedimentation tank of the present invention.

[0026] Figure 4 The dynamic decanting structure of the present invention and Figure 3 Comparison diagram.

[0027] Figure 5 This is a schematic diagram of the filter plate A, the fixing ring, and the decanting pipe of the present invention.

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the fixed central rod, filter plate A, and fixing ring of the present invention.

[0029] Figure 7 This is a schematic cross-sectional view of the decanting pipe structure of the present invention.

[0030] Figure 8 This is a schematic diagram of the cross-sectional structure of the rotating ring of the present invention.

[0031] Figure 9 This is a schematic diagram of the filter plate B, rotating ring, and aeration mechanism of the present invention.

[0032] Figure 10 This is a schematic diagram of the disassembled structure of the aeration mechanism of the present invention.

[0033] Figure 11 This is a cross-sectional view of the rotating frame structure of the present invention.

[0034] Figure 12 This is a cross-sectional view of the aeration block structure of the present invention.

[0035] Figure 13 This is a schematic diagram showing the impurity concentration state of the decanting pipe and the coordination of the aeration components according to the present invention.

[0036] Figure 14 This is a schematic diagram showing the impurity dispersion state of the decanting pipe and the coordination of the aeration components according to the present invention.

[0037] Explanation of the labels in the diagram:

[0038] 1. Sedimentation tank; 2. Cover plate; 3. Fixed central rod; 4. Filter plate A; 5. Fixed ring; 6. Filter plate B; 7. Rotary ring; 8. Decanting pipe; 9. Aeration mechanism; 10. Base frame; 11. Drive mechanism;

[0039] 501, Sliding hole;

[0040] 701. Rotary channel; 702. Through channel; 703. Water outlet;

[0041] 801. Pipe body; 802. Decanting outlet; 803. Ball head; 804. Clear liquid chamber;

[0042] 901. Rotating frame; 902. Linkage gear; 903. Internal gear; 904. Aeration assembly;

[0043] 9011, rotary groove; 9012, sliding groove; 9013, external tooth groove;

[0044] 9041, rack; 9042, aeration block; 9043, air chamber; 9044, air inlet; 9045, air outlet; 9046, friction roller;

[0045] 1001. Perforation; 1002. Drainage pipe. Detailed Implementation

[0046] like Figures 1 to 14As shown, the present invention relates to a landfill leachate collection and treatment device, comprising a sedimentation tank 1, a cover plate 2 at the top of the sedimentation tank 1, a fixed central rod 3 inserted at the axial position inside the sedimentation tank 1, a filter plate A4 fixedly sleeved at the top of the fixed central rod 3, a fixed ring 5 sleeved on the outer wall of the filter plate A4, a filter plate B6 sleeved at the bottom of the sedimentation tank 1, a rotating ring 7 rotatably sleeved on the outer wall of the filter plate B6, a decanting pipe 8 rotatably inserted in a ring at equal intervals on the rotating ring 7, the end of the decanting pipe 8 away from the rotating ring 7 being movably inserted on the fixed ring 5, an aeration mechanism 9 fixedly connected to the bottom of the rotating ring 7, a base frame 10 rotatably connected to the bottom of the aeration mechanism 8, and a driving mechanism 11 provided on the base frame 10;

[0047] The drive mechanism 11 engages with the aeration mechanism 9 to rotate, and the aeration mechanism 9 drives the rotating ring 7 to rotate, causing several sets of decanting pipes 8 to rotate. The decanting pipes 8 are movably inserted into one end of the fixed ring 5 and rise or fall horizontally to form a dynamic decanting structure, thereby realizing multi-layered collection of landfill leachate.

[0048] Several sets of decanting pipes 8 rotate and converge to form a concentrated state of impurities. At this time, aeration is carried out through the aeration mechanism 9. The gas rises along the inclined decanting pipes 8, which enhances the contact between organic matter and microorganisms in the leachate in the sedimentation tank 1 and dissolved oxygen. Several sets of decanting pipes 8 rotate and disperse to form a dispersed state of impurities, and evenly distribute dissolved oxygen.

[0049] In this invention, the drive mechanism 11 drives the aeration mechanism 9 to rotate via gear meshing. The rotating frame 901 at the bottom of the aeration mechanism 9 rotates synchronously, thereby driving the rotating ring 7 to rotate around the outer wall of the filter plate B6. When the rotating ring 7 rotates, the bottom end of the decanting pipe 8 rotates with the rotating ring 7, while the top end is restricted by the sliding hole 501 of the fixed ring 5 and can only move in the horizontal direction, resulting in a change in the overall tilt angle of the decanting pipe 8 and a change in the height of the top end of the decanting pipe 8. The decanting port 802 draws in the filtrate at the corresponding height, which passes through the clear liquid chamber 804, the ball head 803, and the rotating trough 701, and is discharged from the outlet hole 703 through the through channel 702, completing the stratified collection.

[0050] like Figure 3 and Figure 13 As shown, the decanting pipe 8 rotates and gathers the impurities in the landfill leachate. At this time, the aeration mechanism 9 operates, and the gas is guided through several inclined decanting pipes 8 to treat the part where the impurities are concentrated. This prevents energy waste caused by excessive dissolved oxygen in some areas and insufficient dissolved oxygen in some areas, which would prevent efficient contact between organic matter and microorganisms.

[0051] See Figure 4 and Figure 14 When fully aerated, the microorganisms oxidize and decompose the organic matter in the leachate under conditions of sufficient dissolved oxygen. Then, the decanting pipe 8 rotates and disperses the microorganisms, which are evenly distributed and diffused, facilitating subsequent sedimentation.

[0052] In an embodiment of the present invention, the fixed ring 5 is provided with sliding holes 501 at equal intervals in a ring shape, and the top end of the decanting pipe 8 is movably inserted into the sliding holes 501.

[0053] In this invention, the sliding hole 501 on the fixed ring 5 forms a sliding connection structure with the top end of the decanting pipe 8. When the rotating ring 7 drives the bottom end of the decanting pipe 8 to rotate, since the top end of the decanting pipe 8 is movably inserted into the sliding hole 501, the sliding hole 501 guides and limits the horizontal movement of the top end of the decanting pipe 8. During the rotation of the rotating ring 7, the bottom end of the decanting pipe 8 makes a circular motion, while its top end is restricted by the sliding hole 501 and can only slide horizontally within the range allowed by the sliding hole 501. This causes the overall tilt angle of the decanting pipe 8 to change, and at the same time realizes the change of the height of the top end of the decanting pipe 8, providing a mechanical structural basis for dynamically adjusting the decanting height.

[0054] In an embodiment of the present invention, rotating ring 7 is provided with rotating grooves 701 at equal intervals in an annular shape, the bottom end of decanting pipe 8 is rotatably inserted into rotating groove 701, and through grooves 702 are provided at equal intervals in an annular shape inside rotating ring 7. Several rotating grooves 701 are connected through through grooves 702, and water outlet holes 703 are provided on the outer wall of rotating ring 7. The water outlet holes 703 are connected to one of the rotating grooves 701.

[0055] In this invention, the rotating groove 701 on the rotating ring 7 provides a rotating connection base for the bottom end of the decanting pipe 8, allowing the decanting pipe 8 to adjust its angle using the rotating groove 701 as a fulcrum. When the decanting pipe 8 rotates, its bottom end can rotate flexibly within the rotating groove 701, realizing changes in the overall tilt angle of the decanting pipe 8. A through groove 702 connects several rotating grooves 701 to each other, constructing an internal channel network for filtrate flow. The leachate collected by the decanting pipe 8 flows into the rotating groove 701 through its internal cavity, and then, utilizing the connectivity of the through groove 702, is transported and collected within the rotating ring 7. The outlet hole 703 is connected to one of the rotating grooves 701, serving as the outlet for the leachate to flow out of the rotating ring 7. The leachate collected through the through groove 702 is finally discharged from the outlet hole 703, realizing the entire process of leachate collection, transport, and discharge within the rotating ring 7.

[0056] In an embodiment of the present invention, the decanting pipe 8 includes a pipe body 801, a decanting port 802, a ball head 803, and a clear liquid chamber 804. The ball head 803 is rotatably inserted into the rotating groove 701, and the pipe body 801 is fixedly connected to the ball head 803. The decanting port 802 is located at the end of the pipe body 801 away from the ball head 803, and the clear liquid chamber 804 is located inside the pipe body 801. The pipe body 801, the decanting port 802, and the ball head 803 are internally connected.

[0057] In this invention, the decanting pipe 8 is rotatably connected to the rotating groove 701 of the rotating ring 7 via a ball head 803, providing a basis for the flexible multi-angle rotation of the decanting pipe 8. When the decanting pipe 8 rotates under external force, the ball head 803 can rotate freely within the rotating groove 701, driving the pipe body 801 to adjust its tilt angle. The clear liquid chamber 804 inside the pipe body 801 constitutes a filtrate transmission channel, and the decanting port 802, as the inlet for the leachate, is located at the end of the pipe body 801 away from the ball head 803. During operation, the decanting port 802 directly contacts the leachate in the sedimentation tank, using the water level difference and liquid flow pressure to draw the leachate at the corresponding height into the clear liquid chamber 804. The drawn-in leachate is transmitted downward through the clear liquid chamber 804, and through a structure communicating with the inside of the ball head 803, the collected leachate is discharged from the decanting pipe 8, preparing for subsequent discharge via the rotating ring 7.

[0058] In an embodiment of the present invention, the aeration mechanism 9 includes a rotating frame 901, a linkage gear 902, an internal gear 903, and an aeration assembly 904. The rotating frame 901 is rotatably mounted on the base frame 10, and the outer wall of the rotating frame 901 is meshed with the output end of the drive mechanism 11. The linkage gear 902 is rotatably mounted on the rotating frame 901, and the internal gears 903 are rotatably inserted into the base frame 10 in a ring at equal intervals. One of the internal gears 903 passes through the base frame 10 and is connected to the motor. The aeration assembly 904 is slidably inserted into the rotating frame 901 in a ring at equal intervals. The linkage gear 902 is meshed with several internal gears 903, and the top of the internal gears 903 is meshed with the aeration assembly 904.

[0059] In this invention, the aeration component 904 is slidably inserted into the rotating frame 901, with its bottom meshing with the top of the internal gear 903. When the internal gear 903 rotates, the aeration component 904 is pushed to slide radially on the rotating frame 901 through the inter-tooth force, so that the aeration component 904 can adjust its position while rotating, thereby changing the aeration position and range and providing a dynamic aeration effect for the leachate in the sedimentation tank.

[0060] In another embodiment of the present invention, a rotary groove 9011 is provided at the bottom of the rotary frame 901, and a linkage gear 902 is rotatably connected to the rotary groove 9011. A sliding groove 9012 is provided at the top of the rotary frame 901 in an annular shape with equal spacing. An aeration component 904 is slidably inserted into the sliding groove 9012. An external tooth groove 9013 is provided at the bottom of the outer wall of the rotary frame 901, and the external tooth groove 9013 is meshed with the output end of the drive mechanism 11.

[0061] In this invention, the rotating frame 901 provides rotational support for the linkage gear 902 via a bottom groove 9011, allowing the linkage gear 902 to rotate flexibly within the groove and ensuring stable meshing transmission with the internal gear 903. The top sliding groove 9012 provides a sliding track for the aeration assembly 904, enabling the aeration assembly 904 to reciprocate radially within the groove, achieving dynamic adjustment of the aeration position. The external toothed groove 9013 at the bottom of the outer wall meshes with the output end of the drive mechanism 11. When the drive mechanism operates, the rotating frame 901 rotates as a whole through the inter-tooth transmission of the external toothed groove.

[0062] In another embodiment of the present invention, the aeration assembly 904 includes a rack 9041 and an aeration block 9042. The rack 9041 is slidably inserted into the slide groove 9012, the aeration block 9042 is fixedly disposed on the top of the rack 9041, the output end of the aeration block 9042 is movably disposed at the bottom of the sedimentation tank 1, and the input end of the aeration block 9042 is connected to the air supply mechanism through a hose.

[0063] In this invention, the aeration component 904 is connected to the rotating frame 901 via a sliding groove 9012 formed by a rack 9041. When the internal gear 903 rotates, its top tooth surface meshes with the rack 9041, driving the rack 9041 to slide radially along the sliding groove 9012, thereby causing the aeration block 9042 fixed to the top of the rack to move synchronously. The air supply mechanism delivers gas to the input end of the aeration block 9042 through a hose. The gas is released from the output end through the internal flow channel of the aeration block 9042, forming bubbles at the bottom of the sedimentation tank 1, thus achieving aeration treatment of the leachate. The aeration block 9042 can dynamically adjust its aeration position as the rack 9041 slides, and in conjunction with the rotation of the rotating frame 901, achieves aeration coverage and uniform air distribution throughout the entire tank.

[0064] In an embodiment of the present invention, an air chamber 9043 is provided inside the aeration block 9042, an air inlet 9044 is provided at one end of the aeration block 9042, and an air outlet 9045 is provided on the top surface of the other end of the aeration block 9042. The air supply mechanism inputs gas into the air inlet 9044 through the air chamber 9043 and discharges it through the air outlet 9045.

[0065] In this invention, the aeration block 9042 constructs a gas transmission channel through an internal air chamber 9043. The gas supply mechanism introduces gas through a flexible hose from the air inlet 9044. After being temporarily stored and evenly distributed within the air chamber 9043, the gas is discharged from the air outlet 9045 on the top surface of the other end. This structure utilizes the volumetric buffering effect of the air chamber 9043 to stabilize the gas output pressure. Simultaneously, the directional opening of the air outlet 9045 allows bubbles to be released vertically or obliquely upwards, precisely controlling the rising trajectory of the bubbles within the sedimentation tank and ensuring uniform diffusion of dissolved oxygen during aeration.

[0066] In another embodiment of the present invention, a plurality of friction rollers 9046 are rotatably provided at the top of the aeration block 9042 near the air outlet 9045. The top of the friction rollers 9046 contacts the bottom of the filter plate B6. The motor drives one of the internal gears 903 to rotate. The internal gear 903 meshes with the linkage gear 902 to rotate. The linkage gear 902 drives the plurality of internal gears 903 to rotate synchronously. The internal gears 903 mesh with the rack 9041 to drive the aeration block 9042 to move. The movement of the aeration block 9042 causes the friction rollers 9046 to rub against the filter plate B6.

[0067] In this invention, a motor drives one of the internal gears 903 to rotate. This internal gear 903 meshes with a linkage gear 902, causing the linkage gear 902 to rotate, thereby causing several internal gears 903 to rotate synchronously. The rotating internal gear 903 meshes with a rack 9041, driving the rack 9041 to slide along the slide groove 9012 of the rotating frame 901, thereby moving the aeration block 9042 fixed to the top of the rack 9041.

[0068] In this invention, since the top of the aeration block 9042 is provided with several sets of friction rollers 9046 near the air outlet 9045, and the top of the friction rollers 9046 keeps in contact with the bottom of the filter plate B6, the friction rollers 9046 roll along with the aeration block 9042 during its movement. By generating relative friction with the bottom surface of the filter plate B6, they continuously scrape the impurities and sludge attached to the bottom surface of the filter plate B6, thereby achieving automatic cleaning of the filter plate B6.

[0069] In another embodiment of the present invention, a through hole 1001 is provided on the base frame 10 at the center of the axis, the fixing rod 3 is inserted into the through hole 1001, and a sludge drain pipe 1002 is also provided at the bottom of the base frame 10.

[0070] In this invention, the through hole 1001 at the center of the base frame 10 provides installation positioning for the fixing rod 3. After the fixing rod 3 is inserted into the through hole 1001, it can stably support the internal structure of the sedimentation tank 1, ensuring that components such as the filter plate A4 and the fixing ring 5 are in a centrally fixed state, maintaining the overall stability of the device. At the same time, the sludge discharge pipe 1002 at the bottom of the base frame 10 serves as a discharge channel for the settled sludge. When the sludge deposited at the bottom of the sedimentation tank 1 reaches a certain amount, the sludge discharge pipe 1002 is opened, and under the action of gravity or external pressure, the sludge at the bottom of the tank is discharged through the sludge discharge pipe 1002, realizing the periodic cleaning of sludge in the device.

[0071] Working principle: This embodiment provides a landfill leachate collection and treatment device. In use, the drive mechanism 11 first drives the rotating frame 901 of the aeration mechanism 9 to rotate through gear meshing. The rotating frame 901 drives the rotating ring 7 to rotate around the outer wall of the filter plate B6. When the rotating ring 7 rotates, the bottom end of the decanting pipe 8 rotates with the rotating ring 7. Its top end is restricted by the sliding hole 501 of the fixed ring 5 and can only move horizontally, which causes the tilt angle and top height of the decanting pipe 8 to change. The decanting port 802 draws in the corresponding height of filtrate, which passes through the clear liquid chamber 804, ball head 803, rotating trough 701, and through trough 702, and is discharged from the outlet hole 703 of the rotating ring 7, realizing multi-layer collection.

[0072] When the decanting pipe 8 rotates and gathers, impurities are concentrated. The aeration block 9042 of the aeration mechanism 9 inputs gas through the air inlet 9044 and discharges it through the air chamber 9043 and the air outlet 9045. The gas rises along the inclined decanting pipe 8 to enhance the contact of dissolved oxygen. When the decanting pipe 8 rotates and disperses, the aeration block 9042 moves and evenly distributes dissolved oxygen. At the same time, when the aeration block 9042 moves, the friction roller 9046 at its top rubs against the filter plate B6 to achieve cleaning. The sludge at the bottom of the sedimentation tank is discharged through the sludge discharge pipe 1002 of the base frame 10.

[0073] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A landfill leachate collection and treatment device, characterized in that, The system includes a sedimentation tank, a cover plate at the top of the sedimentation tank, a fixed central rod inserted at the center of the sedimentation tank, a filter plate A fixedly sleeved at the top of the fixed central rod, a fixed ring sleeved on the outer wall of the filter plate, a filter plate B sleeved at the bottom of the sedimentation tank, a rotating ring rotatably sleeved on the outer wall of the filter plate B, a decanting pipe inserted in a ring at equal intervals on the rotating ring, the end of the decanting pipe away from the rotating ring being movably inserted on the fixed ring, an aeration mechanism fixedly connected to the bottom of the rotating ring, a base frame rotatably connected to the bottom of the aeration mechanism, and a drive mechanism provided on the base frame. The drive mechanism engages and drives the aeration mechanism to rotate, which in turn drives the rotating ring to rotate, causing several sets of decanting pipes to rotate. The decanting pipes are movably inserted into one end of the fixed ring and rise or fall horizontally to form a dynamic decanting structure, thereby realizing multi-layered collection of landfill leachate. Several sets of decanting pipes rotate and converge to form a concentrated state of impurities. At this time, aeration is carried out through the aeration mechanism. The gas rises along the inclined decanting pipes, which enhances the contact between organic matter and microorganisms in the leachate in the sedimentation tank and dissolved oxygen. Several sets of decanting pipes rotate and disperse to form a dispersed state of impurities, and evenly distribute dissolved oxygen. The fixed ring has sliding holes at equal intervals in a ring shape, and the top end of the decanting pipe is movably inserted into the sliding holes; The aeration mechanism includes a rotating frame, a linkage gear, an internal gear, and an aeration component. The top of the rotating frame has a sliding groove with equal spacing in a ring. The aeration component includes a rack and an aeration block. The rack is slidably inserted into the sliding groove. The aeration block is fixedly installed on the top of the rack. The output end of the aeration block is movably installed at the bottom of the sedimentation tank. The input end of the aeration block is connected to the air supply mechanism through a hose.

2. The landfill leachate collection and treatment device according to claim 1, characterized in that, The rotating ring has rotating grooves at equal intervals in a ring shape. The bottom end of the decanting pipe is rotatably inserted into the rotating groove. The rotating ring has through grooves at equal intervals in a ring shape inside. Several rotating grooves are connected through the through grooves. The outer wall of the rotating ring has a water outlet hole, which is connected to one of the rotating grooves.

3. The landfill leachate collection and treatment device according to claim 2, characterized in that, The decanting pipe includes a pipe body, a decanting outlet, a ball head, and a clear liquid chamber. The ball head is rotatably inserted into the rotating groove, and the pipe body is fixedly connected to the ball head. The decanting outlet is located at one end of the pipe body away from the ball head, and the clear liquid chamber is located inside the pipe body. The pipe body, the decanting outlet, and the ball head are connected internally.

4. The landfill leachate collection and treatment device according to claim 3, characterized in that, The rotating frame is rotatably mounted on the base frame. The outer wall of the rotating frame is meshed with the output end of the drive mechanism. The linkage gear is rotatably mounted on the rotating frame. The internal gears are rotatably inserted into the base frame in a ring at equal intervals. One of the internal gears passes through the base frame and is connected to the motor. The aeration assembly is slidably inserted into the rotating frame in a ring at equal intervals. The linkage gear meshes with several of the internal gears. The top of the internal gears meshes with the aeration assembly.

5. The landfill leachate collection and treatment device according to claim 4, characterized in that, The bottom end of the rotating frame is provided with a swivel groove, the linkage gear is rotatably connected to the swivel groove, the aeration component is slidably inserted into the swivel groove, and the bottom end of the outer wall of the rotating frame is provided with an external tooth groove, which is meshed with the output end of the drive mechanism.

6. The landfill leachate collection and treatment device according to claim 5, characterized in that, The aeration block has an air chamber inside, an air inlet at one end and an air outlet on the top surface at the other end. The air supply mechanism introduces gas into the air inlet through a hose, which then passes through the air chamber and is discharged through the air outlet.

7. The landfill leachate collection and treatment device according to claim 6, characterized in that, Several sets of friction rollers are rotatably provided at the top of the aeration block near the air outlet. The top of the friction rollers contacts the bottom of the filter plate B. The motor drives one of the internal gears to rotate. The internal gear meshes with the linkage gear to rotate. The linkage gear drives several internal gears to rotate synchronously. The internal gears mesh with the rack to move the aeration block. The movement of the aeration block causes the friction rollers to rub against the filter plate B.

8. The landfill leachate collection and treatment device according to claim 7, characterized in that, A through hole is provided on the base frame at the center of the axis, and the fixing rod is inserted into the through hole. A sludge discharge pipe is also provided at the bottom end of the base frame.

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