A comprehensive treatment device for landfill leachate

Abstract

This invention relates to the field of landfill leachate treatment equipment, specifically to a comprehensive landfill leachate treatment device. The device includes a mounting bracket with a filtration mechanism for filtering the leachate. The filtration mechanism is slidable along the height of the mounting bracket. The filtration mechanism includes a one-way open mounting seat and an annular cover plate abutting the mounting seat. The annular cover plate and the mounting seat together form a circular filter chamber. The annular cover plate has a filter plate arranged radially therefor for filtering the leachate, and a filter screen arranged circumferentially at the edge of the annular cover plate. This invention not only significantly improves the removal efficiency of inorganic particulate impurities such as sand, gravel, and slag in landfill leachate, but also eliminates the need for manual cleaning of the filtered inorganic particulate impurities, thereby significantly reducing the labor intensity of workers.

Description

Technical Field

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

[0002] Comprehensive treatment of landfill leachate is a technological approach aimed at fully treating landfill leachate to meet discharge standards or achieve reuse, while minimizing pollutant emissions and waste generation. Comprehensive treatment of landfill leachate mainly includes the following steps:

[0003] 1. Pretreatment: This typically includes screens, grit chambers, and equalization tanks, used to remove large particles and sand from the leachate, and to regulate water quality and quantity, providing stable influent conditions for subsequent treatment. For example, screens intercept large pieces of waste in landfill leachate to prevent them from clogging subsequent treatment equipment.

[0004] 2. Biological Treatment: This is one of the core processes, and common technologies include activated sludge, biofilm, and anaerobic biological treatment. Through the action of microorganisms, organic pollutants in the leachate are decomposed into harmless substances such as carbon dioxide and water. For example, anaerobic biological treatment can utilize anaerobic microorganisms to convert organic matter into biogas under anaerobic conditions, achieving energy recovery.

[0005] 3. Advanced Treatment: Leachate after biological treatment usually requires further advanced treatment to meet stricter discharge standards or reuse requirements. Advanced treatment methods include membrane separation technology (such as reverse osmosis and nanofiltration), advanced oxidation technology (such as Fenton oxidation and ozone oxidation), and adsorption technology. Taking membrane separation technology as an example, it can effectively remove dissolved organic matter and heavy metal ions from the leachate, significantly improving the quality of the effluent.

[0006] 4. Leachate Treatment: After treatment, landfill leachate will produce a certain amount of concentrate, which is difficult to treat. Common treatment methods include evaporation crystallization, solidification, and reinjection. Evaporation crystallization involves evaporating the water in the concentrate, causing the solute to crystallize and precipitate, thus solidifying and reducing the amount of pollutants. Solidification involves mixing the concentrate with a solidifying agent to form a stable solid substance that is easy to landfill or dispose of.

[0007] During pretreatment, bar screens are used to intercept larger debris in landfill leachate, such as plastic bags, paper, branches, and textiles. If these debris enters subsequent treatment equipment, they can cause blockages, entanglement, and even damage to the equipment. After bar screen treatment, the leachate still carries inorganic particulate impurities such as sand, gravel, and slag. Grit chambers utilize gravity to allow these heavier inorganic particles to settle to the bottom, effectively removing impurities like sand from the leachate. This prevents wear and blockage of subsequent treatment equipment, protects pumps, pipes, valves, and other equipment, and extends their lifespan. While grit chambers effectively remove these inorganic particulate impurities through gravity, the settling time is relatively long, and regular cleaning of the deposited impurities is necessary, reducing the overall treatment efficiency of the landfill leachate. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0009] A comprehensive treatment device for landfill leachate includes a mounting bracket, a filtration mechanism for filtering leachate is provided on the mounting bracket, the filtration mechanism is slidable along the height direction of the mounting bracket, and an elastic mechanism for lifting the filtration mechanism is provided on the mounting bracket.

[0010] The filtration mechanism includes a one-way open mounting base and an annular cover plate abutting against the mounting base. The annular cover plate and the mounting base together form an annular filtration chamber. The annular cover plate is provided with a filter plate arranged radially therefor for filtering leachate. The edge of the annular cover plate is provided with a filter screen arranged circumferentially therefor. The middle part of the mounting base is provided with a water inlet hole communicating with the filtration chamber. The bottom end of the mounting base is provided with a drain outlet for discharging the filtered leachate. The upper end of the filtration chamber is provided with a sludge outlet, and the mounting base is provided with a guide plate located below the sludge outlet.

[0011] It also includes a drive mechanism, which includes a drive motor. The drive mechanism is used to drive the annular cover plate to rotate so that the filter plate scrapes and sends the impurities in the filter chamber to the drain outlet for discharge.

[0012] It also includes a control mechanism, which is used to activate the circuit of the drive motor to make the drive mechanism work when the mounting base is lowered to a designated position.

[0013] As a preferred embodiment of the present invention, the mounting base includes a ring-shaped base plate, an outer perimeter plate perpendicular to the edge of the base plate, a ring-shaped central perimeter plate in the middle of the base plate that is in clearance fit with the inner wall of the annular cover plate; a water inlet is provided at the base plate, a drain outlet is provided at the bottom end of the outer perimeter plate, and a perimeter plate opening is provided at the top of the central perimeter plate to form a sewage outlet.

[0014] As a preferred embodiment of the present invention, the mounting base is provided with a connecting frame, the connecting frame including a mounting plate disposed at the lower end of the mounting base, and a connecting plate connected to the side wall of the mounting base at the upper end surface of the mounting plate; the mounting bracket is provided with a slide rail disposed along the height direction of the mounting bracket, and the connecting frame is provided with a slider that cooperates with the slide rail.

[0015] As a preferred embodiment of the present invention, the elastic mechanism includes a threaded post disposed at the mounting bracket and located below the mounting plate, the threaded post having a threaded post blind hole, and an optical shaft at the bottom end face of the mounting plate having a clearance fit with the threaded post blind hole and extending into the threaded post blind hole; a lifting spring for lifting the mounting plate is sleeved on the threaded post, and an adjusting nut for adjusting the compression of the lifting spring is also provided at the threaded post.

[0016] As a preferred embodiment of the present invention, a gear ring is provided at the end face of the annular cover plate away from the mounting base, the driving mechanism includes a driving motor disposed on the mounting plate, a gear meshing with the gear ring is provided at the rotating shaft of the driving motor, and the driving mechanism also includes an external power source for supplying power to the driving motor.

[0017] As a preferred embodiment of the present invention, the control mechanism includes a mounting column disposed at the mounting bracket, a mounting column blind hole at the upper end of the mounting column, a mounting block fixedly disposed at the bottom end of the mounting column blind hole, and a first magnetic block fixedly disposed at the upper end of the mounting block; a sliding column is also slidably disposed in the mounting column blind hole, a second magnetic block attracted to the first magnetic block is disposed at the lower end of the sliding column, a first conductive ring is disposed at the upper end face of the mounting block, and a second conductive ring is disposed at the lower end face of the sliding column for contacting the first conductive ring to close the power circuit of the drive motor; the first conductive ring and the second conductive ring are electrically connected to the drive mechanism via cables.

[0018] The sidewall at the lower end of the sliding column expands outward to form a lower flange of the sliding column that fits with the blind hole of the mounting column. A sliding column spring is provided in the blind hole of the mounting column between the lower flange of the sliding column and the mounting block and is used to lift the sliding column. The elastic force of the sliding column spring is less than the magnetic attraction force between the first magnetic block and the second magnetic block.

[0019] The control mechanism also includes a connecting rod disposed at the mounting base. A strip-shaped opening is provided in the blind hole of the mounting post. The end of the connecting rod extends into the blind hole of the mounting post through the strip-shaped opening. An insulating collar is provided at the end of the connecting rod extending into the blind hole of the mounting post. The insulating collar is used to press the lower flange of the sliding post as the mounting base descends so that the first conductive ring and the second conductive ring come into contact. The upper end of the sliding post is also provided with an upper flange of the sliding post. The insulating collar is also used to push the upper flange of the sliding post as the mounting base rises so that the first magnetic block and the second magnetic block disengage.

[0020] As a preferred embodiment of the present invention, the number of filter plates at the annular cover is 4, the angle between two adjacent filter plates is 90°, the number of water inlets is 2 and they are respectively set at both ends of the middle of the mounting base, and the 4 filter plates are respectively located at the upper and lower ends of the two water inlets; the rotation angle of the annular cover is 270° from the time the first conductive ring and the second conductive ring start to contact each other until the first conductive ring and the second conductive ring disengage.

[0021] As a preferred embodiment of the present invention, it also includes a water inlet pipe, which is provided with a two-part pipe for connecting to the two water inlet holes.

[0022] As a preferred embodiment of the present invention, a baffle for abutting the annular cover plate against the mounting base is bolted to the central enclosure plate.

[0023] As a preferred embodiment of the present invention, a drain pipe is provided at the lower end of the drain outlet.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. Compared with the current landfill leachate sedimentation tank, the present invention not only significantly improves the removal efficiency of inorganic particulate impurities such as sand, gravel, and slag in landfill leachate, but also eliminates the need for manual cleaning of the filtered inorganic particulate impurities such as sand, gravel, and slag, thereby significantly reducing the labor intensity of workers.

[0026] 2. In this invention, the compression of the lifting spring can be adjusted by adjusting the nut, thereby setting the trigger threshold for the impurity load. This allows the equipment to initiate a cleaning operation when the impurities reach a certain amount, based on different operating conditions and processing requirements.

[0027] 3. In this invention, by setting the number of filter plates at the annular cover, the angle between the filter plates, and the rotation angle of the annular cover, the filtration effect of landfill leachate is significantly improved after rotating the annular cover. The two water inlets allow for filtration of the landfill leachate after several rotations, enabling backwashing of the filter plates by engaging with different surfaces of the filter plates. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the landfill leachate full-volume treatment device in a specific implementation embodiment;

[0029] Figure 2 This is a cross-sectional view of the landfill leachate full-volume treatment device in a specific implementation embodiment;

[0030] Figure 3 This is a schematic diagram of the mounting base in a specific implementation embodiment;

[0031] Figure 4 This is a schematic diagram of the annular cover plate in a specific implementation embodiment;

[0032] Figure 5 This is a schematic diagram of the mounting bracket in a specific implementation embodiment;

[0033] Figure 6 This is a schematic diagram of the control mechanism in a specific implementation embodiment;

[0034] Figure 7 This is a schematic diagram illustrating the use of the water inlet pipe and the two-point pipe in a specific implementation method.

[0035] The attached figures are labeled as follows:

[0036] 110-Mounting bracket, 120-Mounting base, 130-Annular cover plate, 131-Gear ring, 140-Guide plate, 150-Connecting frame, 151-Mounting plate, 152-Connecting plate, 160-Slide rail, 170-Drive motor, 180-Gear, 190-Baffle, 1100-Drain pipe, 1110-Slider, 210-Filter chamber, 220-Filter plate, 230-Filter screen, 240-Water inlet, 250-Drain outlet, 260-Sewage outlet, 310-Base plate, 320-Outer side panel, 330-Central side panel, 340- Enclosure opening, 510-threaded post, 520-threaded post blind hole, 530-lifting spring, 540-adjusting nut, 550-mounting post, 560-mounting post blind hole, 610-mounting block, 620-first magnetic block, 630-sliding post, 640-second magnetic block, 650-first conductive ring, 660-second conductive ring, 670-lower flange of sliding post, 680-sliding post spring, 690-connecting rod, 6110-insulating collar, 6120-upper flange of sliding post, 6100-strip opening, 710-water inlet pipe, 720-two-point pipe. Detailed Implementation

[0037] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0038] like Figure 1-4As shown, this embodiment provides a comprehensive treatment device for landfill leachate, which includes a mounting bracket 110. The mounting bracket 110 is provided with a filtration mechanism for filtering leachate. The filtration mechanism can slide along the height direction of the mounting bracket 110. The mounting bracket 110 is provided with an elastic mechanism for lifting the filtration mechanism.

[0039] The filtration mechanism includes a one-way opening mounting base 120 and an annular cover plate 130 abutting against the mounting base 120. The annular cover plate 130 is rotatable at the mounting base 120 and rotates along the axis of the mounting base 120. The annular cover plate 130 and the mounting base 120 together form an annular filter chamber 210. A filter plate 220 is provided at the annular cover plate 130, which is radially arranged and used to filter the leachate. A filter screen 230 is provided at the edge of the annular cover plate 130, which is circumferentially arranged. A water inlet hole 240 communicating with the filter chamber 210 is provided in the middle of the mounting base 120. A drain outlet 250 for discharging the filtered leachate is provided at the bottom end of the mounting base 120. A drain pipe 1100 is provided at the lower end of the drain outlet 250. A sewage outlet 260 is provided at the upper end of the filter chamber 210, and a guide plate 140 located below the sewage outlet 260 is provided at the mounting base 120.

[0040] It also includes a drive mechanism, which includes a drive motor 170. The drive mechanism is used to drive the annular cover plate 130 to rotate so that the filter plate 220 scrapes and sends the impurities in the filter chamber 210 to the drain port 260 for discharge.

[0041] It also includes a control mechanism for activating the circuit of the drive motor 170 to enable the drive mechanism to operate when the mounting base 120 is lowered to a designated position.

[0042] When filtering leachate from waste, the leachate flows into the filter chamber 210 through the inlet 240. The liquid first passes through the filter plate 220 (mesh size 10-50μm) to intercept and filter inorganic particles such as sand and gravel, and then flows into or through the filter screen 230 to the bottom drain outlet 250 and the drain pipe 1100, thereby achieving the discharge of the leachate. Inorganic particles such as sand and gravel in the leachate are retained on the upper surface of the filter plate 220 and the inner side of the filter screen 230, forming a filter cake layer, which gradually increases the filtration resistance, and the weight of the mounting base 120 also increases accordingly.

[0043] As the filter cake layer thickens, the filtration resistance increases, and the weight of the mounting base 120 increases, causing the downward pressure on the filtration mechanism to exceed the elastic force of the lifting spring 530. The mounting base 120 gradually slides downwards. When the mounting base 120 descends to a preset position (e.g., a 5cm descent, set by the adjusting nut 540), the circuit of the drive mechanism closes, and the annular cover 130 rotates. The filter plate 220 rotates with the annular cover 130, pushing impurities on the surface of the filter plate 220 and the inside of the filter screen 230 towards the drain port 260 at the top (because the filter chamber 210 is annular, the impurities move circumferentially to the drain port 260). The impurities fall through the drain port 260 onto the guide plate 140, slide along the guide plate 140 out of the device, and enter the impurity collection box. After the impurities are discharged, the weight of the filter cake layer disappears, the lifting spring 530 releases its elastic force, pushing the mounting plate 151 upwards, causing the filtration mechanism to reset along the slide rail 160. When the filter mechanism is reset, the circuit of the drive mechanism is disconnected, so that the filter plate 220 and the filter screen 230 can filter the landfill leachate again.

[0044] Compared to current landfill leachate sedimentation tanks, the comprehensive treatment device for landfill leachate in this embodiment achieves filtration of inorganic particulate impurities such as sand, gravel, and slag in the leachate through filter plates 220 and filter screens 230. Furthermore, it automatically discharges the filtered inorganic particulate impurities from the device. Therefore, compared to current sedimentation tank methods for treating inorganic particulate impurities such as sand, gravel, and slag in leachate, this device not only significantly improves the removal efficiency of these impurities but also eliminates the need for manual cleaning of the filtered impurities, thus greatly reducing the labor intensity of workers.

[0045] It should be noted that the comprehensive treatment device for landfill leachate in this embodiment also includes commonly available components such as bar screens, equalization tanks, biological treatment mechanisms, advanced treatment mechanisms, and concentrate treatment mechanisms. These mechanisms have been mentioned in the background section. Since this embodiment does not involve improvements to the bar screens, equalization tanks, biological treatment mechanisms, advanced treatment mechanisms, and concentrate treatment mechanisms, they will not be elaborated upon here. In the actual production process, technicians can connect commonly available bar screens, equalization tanks, biological treatment mechanisms, advanced treatment mechanisms, and concentrate treatment mechanisms to this device to achieve comprehensive treatment of landfill leachate.

[0046] Combination Figure 3As shown, the mounting base 120 includes an annular base plate 310. An outer perimeter plate 320, perpendicular to the edge of the base plate 310, is provided at its edge. A central perimeter plate 330, also an annular shape, is provided in the center of the base plate 310 and is clearance-fitted to the inner wall of the annular cover plate 130. A baffle 190, bolted to the central perimeter plate 330, is used to abut the annular cover plate 130 against the mounting base 120. A water inlet 240 is located at the base plate 310, a drain outlet 250 is located at the bottom end of the outer perimeter plate 320, and a perimeter opening 340 is formed at the top of the central perimeter plate 330 to create a sewage outlet 260.

[0047] The installation base 120 structure enables the filtration and discharge of leachate, while the baffle 190 facilitates the installation of the annular cover 130. During maintenance, the annular cover 130 can be separated from the installation base 120 simply by removing the baffle 190, thus enabling extremely convenient installation and removal of the annular cover 130 and simplifying the maintenance of the device.

[0048] An annular nitrile rubber gasket (2mm thick, Shore 70 hardness) is placed between the mating surfaces of the annular cover plate 130 and the mounting base 120. The compression of the gasket is controlled by the bolt preload to form a sealing pressure of 0.2MPa, ensuring that liquid cannot penetrate the sealing interface. This prevents leachate from flowing out between the annular cover plate 130 and the mounting base 120.

[0049] In this embodiment, the mounting base 120 is provided with a connecting frame 150, which includes a mounting plate 151 disposed at the lower end of the mounting base 120, and a connecting plate 152 disposed at the upper end surface of the mounting plate 151 and connected to the side wall of the mounting base 120; the mounting bracket 110 is provided with a slide rail 160 disposed along the height direction of the mounting bracket 110, and the connecting frame 150 is provided with a slider 1110 that cooperates with the slide rail 160.

[0050] The cooperation between the slider 1110 at the connecting bracket 150 of the mounting base 120 and the slide rail 160 at the mounting bracket 110 enables the mounting base 120 to move relatively stably along the height direction of the mounting bracket 110.

[0051] Combination Figure 5 As shown, the elastic mechanism includes a threaded post 510 disposed at the mounting bracket 110 and located below the mounting plate 151. The threaded post 510 has a threaded post blind hole 520. The bottom end face of the mounting plate 151 is provided with an optical shaft 350 that is clearance-fitted with the threaded post blind hole 520 and extends into the threaded post blind hole 520. A lifting spring 530 for lifting the mounting plate 151 is sleeved on the threaded post 510. An adjusting nut 540 for adjusting the compression of the lifting spring 530 is also provided at the threaded post 510.

[0052] Before the device starts working, the operator adjusts the compression of the lifting spring 530 by adjusting nut 540, thereby setting the initial elastic force of the lifting spring 530. This initial elastic force is determined based on the weight of the filter mechanism and the expected impurity load trigger threshold. The optical shaft 350 extends into the threaded post blind hole 520 to act as a guide, ensuring that the mounting plate 151 and the connected mounting base 120 can only move in the vertical direction, avoiding wobbling or displacement.

[0053] After the impurities in the filter chamber 210 are cleaned, the weight of the mounting base 120 and its accessories is reduced. The elastic force of the lifting spring 530 is greater than the current load, so the lifting spring 530 begins to extend, pushing the mounting plate 151 upward, and the mounting base 120 returns to its initial position. At the same time, the control mechanism resets, the circuit of the drive mechanism is disconnected, and it waits for the next impurity accumulation trigger.

[0054] In this embodiment, the trigger threshold for impurity load can be set by adjusting the compression of the lifting spring 530 through the adjusting nut 540. For example, by changing the initial compression of the lifting spring 530, the elastic force of the lifting spring 530 can be adjusted, thereby controlling the timing of the descent trigger control mechanism of the mounting base 120. This allows the equipment to initiate a cleaning operation when impurities reach a certain amount, according to different working conditions and processing requirements.

[0055] Combination Figure 6 As shown, a gear ring 131 is provided on the end face of the annular cover plate 130 away from the mounting base 120. The drive mechanism includes a drive motor 170 disposed on the mounting plate 151. A gear 180 meshing with the gear ring 131 is provided on the shaft of the drive motor 170. The drive mechanism also includes an external power supply for powering the drive motor 170. The control mechanism includes a mounting post 550 disposed on the mounting bracket 110. A mounting post blind hole 560 is provided at the upper end of the mounting post 550. A mounting block 610 is fixedly disposed at the bottom end of the mounting post blind hole 560. A first magnetic block 620 is fixedly disposed at the upper end of the mounting block 610.

[0056] A sliding post 630 is slidably disposed in the blind hole 560 of the mounting post. The lower end of the sliding post 630 is provided with a second magnetic block 640 that attracts the first magnetic block 620. A first conductive ring 650 is provided on the upper end face of the mounting block 610. A second conductive ring 660 is provided on the lower end face of the sliding post 630 for contacting the first conductive ring 650 to close the power circuit of the drive motor 170. The first conductive ring 650 and the second conductive ring 660 are electrically connected to the drive mechanism through cables. The side wall of the lower end of the sliding post 630 expands outward to form a sliding post lower flange 670 that is clearance-fitted with the blind hole 560 of the mounting post. A sliding post spring 680 is provided in the blind hole 560 of the mounting post, located between the sliding post lower flange 670 and the mounting block 610, for lifting the sliding post 630. The elastic force of the sliding post spring 680 is less than the magnetic attraction force of the first magnetic block 620 and the second magnetic block 640.

[0057] The control mechanism also includes a connecting rod 690 disposed at the mounting base 120. A strip-shaped opening 6100 is provided in the blind hole 560 of the mounting post. The end of the connecting rod 690 extends into the blind hole 560 of the mounting post through the strip-shaped opening 6100. An insulating collar 6110 is provided at the end of the connecting rod 690 extending into the blind hole 560 of the mounting post. The insulating collar 6110 is used to press the lower flange 670 of the sliding post as the mounting base 120 descends so that the first conductive ring 650 contacts the second conductive ring 660. The upper end of the sliding post 630 is also provided with an upper flange 6120 of the sliding post. The insulating collar 6110 is also used to push the upper flange 6120 of the sliding post as the mounting base 120 rises so that the first magnetic block 620 disengages from the second magnetic block 640.

[0058] Before filtering the landfill leachate, the lifting spring 530 extends, pushing the mounting base 120 to the high position. The connecting rod 690 moves upward accordingly. The insulating collar 6110 pulls the upper flange 6120 of the sliding column upward and pushes the lower flange 670 of the sliding column upward through the sliding column spring 680. The combined force of the two overcomes the magnetic attraction between the first magnetic block 620 and the second magnetic block 640, causing the sliding column 630 to move upward. The first magnetic block 620 and the second magnetic block 640 separate, and the first conductive ring 650 and the second conductive ring 660 disconnect.

[0059] As the leachate is filtered, the increased weight of the mounting base 120 compresses the lifting spring 530, causing the mounting base 120 to descend. The connecting rod 690 moves downward accordingly, and the insulating collar 6110 presses down on the lower flange 670 of the sliding column. The magnetic attraction between the first magnetic block 620 and the second magnetic block 640 pulls the sliding column 630 downward, causing it to move downward. This brings the first conductive ring 650 into contact with the second conductive ring 660, closing the circuit of the drive motor 170 and cleaning the impurities in the filter chamber 210.

[0060] After the impurities are discharged, the connecting rod 690 moves upward, the insulating collar 6110 pulls the upper flange 6120 of the sliding column upward, and the sliding column spring 680 pushes the lower flange 670 of the sliding column upward. The combined force of the two overcomes the magnetic attraction between the first magnetic block 620 and the second magnetic block 640, causing the sliding column 630 to move upward, the first magnetic block 620 and the second magnetic block 640 to separate, and the first conductive ring 650 and the second conductive ring 660 to disconnect.

[0061] In this embodiment, the control logic of "zero electronic sensors" is realized through deep coupling between mechanical structure and magnetoelectric components, which solves the problems of easy jamming in traditional mechanical control and easy accidental touch in magnetic control.

[0062] Combination Figure 7 As shown, there are four filter plates 220 at the annular cover plate 130, with an angle of 90° between two adjacent filter plates 220. There are two water inlet holes 240, which are respectively located at both ends of the middle of the mounting base 120. Figure 7 As shown, the landfill leachate full-volume treatment device also includes an inlet pipe 710, with a two-way pipe 720 at the inlet pipe 710 for connecting to the two inlet holes 240. Four filter plates 220 are located at the upper and lower ends of the two inlet holes 240 respectively; the rotation angle of the annular cover plate 130 is 270° from the initial contact between the first conductive ring 650 and the second conductive ring 660 until they disengage.

[0063] By using four filter plates 220 at the annular cover 130, setting the angle between two adjacent filter plates 220 to 90°, and setting the rotation angle of the annular cover 130 to 270°, the leachate can be filtered through different filter plates 220 after rotating the annular cover 130. This avoids long-term filtration of the leachate by the same filter plate 220, thus improving the filtration effect of landfill leachate. Furthermore, the two water inlets 240 allow for filtration of the landfill leachate through interaction with different surfaces of the filter plates 220 after several rotations. This not only improves the filtration effect of landfill leachate but also enables backwashing of the filter plates 220.

[0064] The specific working principle of the landfill leachate comprehensive treatment device in this embodiment is as follows:

[0065] Before filtering the landfill leachate, the lifting spring 530 extends, pushing the mounting base 120 to the high position. The connecting rod 690 moves upward accordingly. The insulating collar 6110 pulls the upper flange 6120 of the sliding column upward and pushes the lower flange 670 of the sliding column upward through the sliding column spring 680. The combined force of the two overcomes the magnetic attraction between the first magnetic block 620 and the second magnetic block 640, causing the sliding column 630 to move upward. The first magnetic block 620 separates from the second magnetic block 640, the first conductive ring 650 separates from the second conductive ring 660, and the circuit of the drive motor 170 is disconnected.

[0066] As impurities from the percolation process accumulate on the surface of the filter plate 220 and the inside of the filter screen 230, forming a filter cake layer, the total weight of the mounting base 120 gradually exceeds the initial elastic force of the lifting spring 530, triggering a descent. The mounting base 120 moves downward along the slide rail 160 via the slider 1110 of the connecting frame 150, and the lifting spring 530 is compressed and stores energy. When it descends to the preset position, the insulating collar 6110 at the end of the connecting rod 690 contacts the lower flange 670 of the sliding column. The insulating collar 6110 presses against the lower flange 670 of the sliding column, overcoming the elastic force of the sliding column spring 680, causing the sliding column 630 to move downward. The second magnetic block 640 attracts the first magnetic block 620, the second conductive ring 660 adheres to the first conductive ring 650, and the circuit of the drive motor 170 is turned on.

[0067] The drive motor 170 drives the annular cover plate 130 to rotate 270° via the gear 180 and gear ring 131. The four filter plates 220 rotate with the annular cover plate 130, pushing the intercepted impurities toward the arc-shaped drain port 260 at the top of the central enclosure plate 330. The impurities slide into the collection box at an angle via the guide plate 140.

[0068] After the impurities are discharged, the weight of the mounting base 120 is reduced, the lifting spring 530 releases its elasticity, and pushes the mounting plate 151 to rise and reset along the slide rail 160. When the mounting base 120 rises, the insulating collar 6110 pushes the flange 6120 on the sliding column, causing the sliding column 630 to move upward against the magnetic attraction. The second magnetic block 640 disengages from the first magnetic block (620), the second conductive ring 660 separates from the first conductive ring 650, the drive motor 170 stops rotating, and the device returns to its initial state, waiting for the next impurity accumulation trigger.

[0069] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. A comprehensive treatment device for landfill leachate, characterized in that: Includes a mounting bracket (110), a filtration mechanism for filtering leachate is provided at the mounting bracket (110), the filtration mechanism is slidable along the height direction of the mounting bracket (110), and an elastic mechanism for lifting the filtration mechanism is provided at the mounting bracket (110). The filtration mechanism includes a one-way open mounting base (120) and an annular cover plate (130) abutting against the mounting base (120). The annular cover plate (130) and the mounting base (120) together form an annular filter chamber (210). The annular cover plate (130) is provided with a filter plate (220) arranged radially thereon for filtering leachate. The edge of the annular cover plate (130) is provided with a filter screen (230) arranged circumferentially thereon. The middle part of the mounting base (120) is provided with a water inlet hole (240) communicating with the filter chamber (210). The bottom end of the mounting base (120) is provided with a drain outlet (250) for discharging the filtered leachate. The upper end of the filter chamber (210) is provided with a drain outlet (260). The mounting base (120) is provided with a guide plate (140) located below the drain outlet (260). It also includes a drive mechanism, which includes a drive motor (170) for driving the annular cover plate (130) to rotate so that the filter plate (220) scrapes the impurities in the filter chamber (210) to the drain port (260) for discharge. It also includes a control mechanism for activating the circuit of the drive motor (170) to enable the drive mechanism to operate when the mounting base (120) descends to a designated position; The mounting base (120) includes a ring-shaped base plate (310), an outer side plate (320) perpendicular to the edge of the base plate (310), and a ring-shaped central side plate (330) in the middle of the base plate (310) that is in clearance fit with the inner wall of the annular cover plate (130). A water inlet (240) is provided at the base plate (310), a drain outlet (250) is provided at the bottom end of the outer side plate (320), and a side plate opening (340) is opened at the top of the central side plate (330) to form a sewage outlet (260). The mounting base (120) is provided with a connecting frame (150), which includes a mounting plate (151) disposed at the lower end of the mounting base (120), and a connecting plate (152) connected to the side wall of the mounting base (120) at the upper end surface of the mounting plate (151); a slide rail (160) is provided at the mounting bracket (110) along the height direction of the mounting bracket (110), and a slider (1110) that cooperates with the slide rail (160) is provided at the connecting frame (150). The number of filter plates (220) at the annular cover plate (130) is 4, the angle between two adjacent filter plates (220) is 90°, the number of water inlet holes (240) is 2 and they are respectively set at both ends of the middle part of the mounting base (120), and the 4 filter plates (220) are respectively located at the upper and lower ends of the two water inlet holes (240).

2. The landfill leachate comprehensive treatment device according to claim 1, characterized in that: The elastic mechanism includes a threaded post (510) disposed at the mounting bracket (110) and located below the mounting plate (151). The threaded post (510) has a threaded post blind hole (520). The bottom end face of the mounting plate (151) is provided with a light shaft (350) that is clearance-fitted with the threaded post blind hole (520) and extends into the threaded post blind hole (520). A lifting spring (530) for lifting the mounting plate (151) is sleeved at the threaded post (510). An adjusting nut (540) for adjusting the compression of the lifting spring (530) is also provided at the threaded post (510).

3. The landfill leachate full-volume treatment device according to claim 1, characterized in that: A gear ring (131) is provided on the end face of the annular cover plate (130) away from the mounting base (120). The drive mechanism includes a drive motor (170) provided on the mounting plate (151). A gear (180) meshing with the gear ring (131) is provided on the shaft of the drive motor (170). The drive mechanism also includes an external power source that supplies power to the drive motor (170).

4. The landfill leachate full-volume treatment device according to claim 3, characterized in that: The control mechanism includes a mounting post (550) disposed on the mounting bracket (110), the upper end of the mounting post (550) is provided with a mounting post blind hole (560), the bottom end of the mounting post blind hole (560) is fixedly provided with a mounting block (610), the upper end of the mounting block (610) is fixedly provided with a first magnetic block (620); a sliding post (630) is also slidably disposed in the mounting post blind hole (560), the lower end of the sliding post (630) is provided with a second magnetic block (640) that attracts the first magnetic block (620), the upper end face of the mounting block (610) is provided with a first conductive ring (650), the lower end face of the sliding post (630) is provided with a second conductive ring (660) for contacting the first conductive ring (650) to close the power circuit of the drive motor (170), the first conductive ring (650) and the second conductive ring (660) are electrically connected to the drive mechanism through cables respectively; The sidewall of the lower end of the sliding column (630) expands outward to form a sliding column lower flange (670) that is in clearance fit with the mounting column blind hole (560). A sliding column spring (680) is provided in the mounting column blind hole (560) between the sliding column lower flange (670) and the mounting block (610) for lifting the sliding column (630). The elastic force of the sliding column spring (680) is less than the magnetic attraction force of the first magnetic block (620) and the second magnetic block (640). The control mechanism also includes a connecting rod (690) provided at the mounting base (120). A strip opening (6100) is provided in the blind hole (560) of the mounting post. The end of the connecting rod (690) extends into the blind hole (560) of the mounting post through the strip opening (6100). An insulating collar (6110) is provided at the end of the connecting rod (690) extending into the blind hole (560). The insulating collar (6110) is used to press the lower flange (670) of the sliding post as the mounting base (120) descends so that the first conductive ring (650) contacts the second conductive ring (660). The upper end of the sliding post (630) is also provided with an upper flange (6120). The insulating collar (6110) is also used to push the upper flange (6120) of the sliding post as the mounting base (120) rises so that the first magnetic block (620) disengages from the second magnetic block (640).

5. The landfill leachate full-volume treatment device according to claim 4, characterized in that: The rotation angle of the annular cover plate (130) from the moment the first conductive ring (650) and the second conductive ring (660) begin to contact each other until the first conductive ring (650) and the second conductive ring (660) disengage is 270°.

6. The landfill leachate full-volume treatment device according to claim 5, characterized in that: It also includes a water inlet pipe (710), and a two-part pipe (720) is provided at the water inlet pipe (710), which is used to connect to the two water inlets (240).

7. The landfill leachate full-volume treatment device according to claim 1, characterized in that: A baffle (190) is bolted to the center panel (330) for abutting the annular cover plate (130) against the mounting base (120).

8. The landfill leachate full-volume treatment device according to claim 1, characterized in that: The lower end of the drain outlet (250) is provided with a drain pipe (1100).

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