Landfill leachate pretreatment device

Abstract

The invention discloses a landfill leachate pretreatment device, and relates to the technical field of landfill leachate treatment.The landfill leachate pretreatment device comprises a tank body, supporting legs are fixedly installed at the bottom of the tank body, a feeding opening is fixedly formed in the top of the tank body, a collecting plate is fixedly installed in the tank body, and a filtering device is arranged in the tank body; a stirring device is arranged in the tank body, a quantitative dosing device is arranged in the tank body, the filtering device comprises a motor, a reciprocating screw rod, a sliding block, a first scraping rod, a filtering plate, a first gear, a rotating wheel, a gear ring, a second scraping rod and a collecting box, and suspended solids and dirt attached to the surface of the filtering plate are removed through movement of the first scraping rod, so that the permeability of the filtering plate is kept; meanwhile, the damage or corrosion of the filter plate caused by dirt accumulation is reduced, the service life of the filter plate is prolonged, and the maintenance and replacement cost of the filter plate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate pretreatment device. Background Art

[0002] The landfill leachate pretreatment device is an equipment system used to treat leachate generated from landfills. After pretreatment such as filtration and drug treatment, the concentration of pollutants is reduced so that it can be subsequently treated or meet emission standards.

[0003] The patent with patent announcement number CN219848862U relates to the technical field of landfill leachate treatment. The patent discloses a landfill leachate pretreatment device, including a reaction cylinder, a liquid inlet cylinder is fixedly provided in the middle of the top of the reaction cylinder, a filter box is fixedly provided at the bottom of the reaction cylinder, a connecting pipe is fixedly provided at the bottom of one side of the reaction cylinder, the bottom end of the connecting pipe is fixedly provided at the top of one side of the filter box, a solenoid valve is fixedly provided in the middle of the connecting pipe, a deodorization component is provided at the top of the other side of the filter box, a cleaning component is provided inside the filter box, and a second filter plate is fixedly provided at the bottom of the filter box; the beneficial effects of the patent are: through the deodorization component, the fan is started to discharge the air mixed with odor through the activated carbon plate to prevent the air mixed with odor from being discharged directly; through the cleaning component, the first motor is turned on to rotate the connecting screw to drive the scraper to move, and the scraper drives the cleaning brush to move to scrape off the flocculent material, so as to facilitate the cleaning of the filter box.

[0004] In the above patent, a cleaning component is set up to turn on the first motor, so that the connecting screw rotates, driving the scraper to move, and the scraper drives the cleaning brush to move, so as to scrape off the flocculent material, thereby facilitating the cleaning of the filter box. However, when cleaning the filter box, it is difficult to collect and uniformly treat those impurities and some flocculent materials or garbage, which causes these impurities or garbage to accumulate inside the device, which may cause damage to the equipment due to excessive operation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a garbage leachate pretreatment device, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a landfill leachate pretreatment device, comprising a tank body, a support leg fixedly installed at the bottom of the tank body, a feed port fixedly installed at the top of the tank body, a collecting plate fixedly installed inside the tank body, a filtering device arranged inside the tank body, a stirring device arranged inside the tank body, and a quantitative dosing device arranged inside the tank body; Among them, the filtering device includes a motor, a reciprocating screw, a slider, a scraper rod 1, a filter plate, a gear 1, a rotating wheel, a gear ring, a scraper rod 2 and a collecting box, the motor is fixedly mounted on the outer wall of the tank body, the reciprocating screw is fixedly mounted on the output end of the motor, the slider is slidably mounted on the circumferential surface of the reciprocating screw, the scraper rod 1 is fixedly mounted on the bottom of the slider, the filter plate is fixedly mounted on the top of the collecting plate, the gear 1 is fixedly mounted on the circumferential surface of the reciprocating screw away from one end of the motor, the rotating wheel is fixedly mounted on the inner wall of the tank body, the gear ring is rotatably mounted on the top of the rotating wheel, the scraper rod 2 is fixedly mounted on the inner wall of the gear ring, and the collecting box is slidably mounted on the bottom of the collecting plate, the reciprocating screw is driven by the motor to start rotating, the rotation of the reciprocating screw drives the slider to start moving, and the movement of the slider drives the scraper rod 1 to move.

[0007] According to the above technical solution, the scraper rod 1 contacts the filter plate, the gear 1 meshes with the gear ring, and the scraper rod 2 contacts the collection plate. The contact ensures that the scraper rod 1 can clean the filter plate when it moves, the meshing ensures that the gear 1 can drive the gear ring to rotate when it rotates, and the contact ensures that the scraper rod 2 can clean the collection plate when it moves.

[0008] According to the above technical scheme, the stirring device includes a fixed plate, a rotating rod, a second gear, an elastic telescopic rod one, a rack and a rotating plate, the fixed plate is fixedly installed at the bottom of the collecting plate, the rotating rod rotates and penetrates the fixed plate, the second gear is fixedly installed on the circumferential surface of the rotating rod close to one end of the fixed plate, the elastic telescopic rod one is fixedly installed on the inner wall of the tank body, the rack is fixedly installed on the movable end of the elastic telescopic rod one, and the rotating plate is fixedly installed on the circumferential surface of the rotating rod, and the rack is pushed to start moving while the scraper rod one moves, the rack movement drives the gear two to start rotating, the gear two rotation drives the rotating rod to start rotating, the rotating rod rotation drives the rotating plate to start rotating, after the scraper rod one no longer pushes the rack, the rack starts to reset under the action of the elastic telescopic rod one, and the rack movement and reset drives the gear two to start rotating in the opposite direction.

[0009] According to the above technical solution, the stirring device also includes a hollow cavity, a slide plate and a push rod. The hollow cavity is fixedly installed at the bottom of the inner wall of the tank body, the slide plate is slidably installed on the inner wall of the hollow cavity, and the push rod is fixedly installed on the back of the slide plate. The push rod is pushed to start moving while the turn plate rotates. The movement of the push rod pushes the slide plate to start moving. The movement of the slide plate accelerates the leachate inside the hollow cavity to be pushed outward.

[0010] According to the above technical solution, gear 2 is meshed with the rack, the side of the rotating plate and the push rod close to each other is set as an inclined surface, and spring 1 is arranged between the slide plate and the inner wall of the hollow cavity. The engagement ensures that the rack can drive gear 2 to rotate when it moves, and the setting of the inclined surface ensures that the rotating plate can smoothly push the push rod when it rotates, and the setting of spring 1 ensures that the slide plate can achieve autonomous reset.

[0011] According to the above technical scheme, the quantitative dosing device includes a medicine box, a medicine tube, a medicine tank, a slide rail, a movable door, two elastic telescopic rods and one inclined plane block. The medicine box is fixedly installed on the left side of the tank body, the medicine tube is fixedly installed on the left side of the medicine box, the medicine tank is fixedly installed on the top of the medicine tube, the slide rail is fixedly installed on the inner wall of the tank body, the movable door is slidably installed inside the slide rail, the fixed end of the second elastic telescopic rod is fixedly installed on the inner wall of the tank body, the movable end of the second elastic telescopic rod is fixedly installed on the top of the movable door, and the inclined plane block is fixedly installed on the right side of the movable door. The inclined plane block is pushed to start moving by rotating the rotating plate, and the movement of the inclined plane block drives the movable door to start moving. The movable door moves to open the medicine outlet of the medicine box, so that the absorbent flows from the inside of the medicine box to the inside of the tank body. When the rotating plate no longer pushes the inclined plane block, the movable door starts to reset under the action of the second elastic telescopic rod.

[0012] According to the above technical solution, the quantitative dosing device also includes a baffle, a ramp block 2 and a ramp rod. The baffle is slidably installed inside the medicine box, the ramp block 2 is fixedly installed on the right side of the baffle, and the ramp rod is fixedly installed on the left side of the moving door. When the moving door moves downward, the ramp rod is driven to start moving. The movement of the ramp rod pushes the ramp block 2 to start moving. The movement of the ramp block 2 drives the baffle to start moving. The movement of the baffle opens the medicine inlet between the medicine tube and the medicine box. After the medicine inlet is opened, the absorbent flows into the medicine box from the inside of the medicine tank through the medicine tube, and then drives the ramp rod to start moving when the moving door moves upward. The movement of the ramp rod no longer pushes the ramp block 2.

[0013] According to the above technical solution, the side of the inclined plane block 1 close to the rotating plate is set as an inclined plane, the side of the inclined plane block 2 close to the inclined plane rod is set as an inclined plane, and a spring 2 is arranged between the baffle and the inner wall of the medicine box. By setting the inclined plane, it is ensured that the inclined plane block 1 can be pushed smoothly when the rotating plate rotates, and by setting the inclined plane, it is ensured that the inclined plane rod can push the inclined plane block 2 smoothly when it moves, and by setting the spring 2, it is ensured that the baffle can achieve autonomous reset.

[0014] The present invention provides a garbage leachate pretreatment device, which has the following beneficial effects: (1) The invention removes suspended matter and dirt attached to the surface of the filter plate by moving the scraper rod 1, thereby maintaining the permeability of the filter plate, while reducing damage or corrosion to the filter plate caused by dirt accumulation, extending the service life of the filter plate, and reducing the cost of maintenance and replacement of the filter plate. The scraper rod 2 moves to scrape the impurities that fall on the collection plate from the filter plate cleaned by the scraper rod 1, so that the impurities or garbage enter the collection box, ensuring that these impurities are collected in time to prevent them from blocking the filter plate again, maintaining the permeability and efficient operation of the filtration system, and preventing them from re-entering the treatment system or leaking out, ensuring that the pollutants are effectively controlled.

[0015] (2) The invention can effectively increase the contact area and mixing uniformity between the leachate and the absorbent by rotating the rotating plate forward and backward to stir the filtered leachate inside the tank, thereby improving the reaction rate and treatment effect. This helps to accelerate the removal process of pollutants, while ensuring that the absorbent is evenly distributed in the liquid, thereby improving the adsorption efficiency of the adsorbent and ensuring that more pollutants are effectively removed. The leachate inside the hollow cavity is accelerated to be pushed outward by the movement of the sliding plate, which can increase the contact frequency and intensity between the leachate and the absorbent, helping to improve the adsorption or reaction rate of pollutants, so that the absorbent can more efficiently remove harmful substances in the leachate, while avoiding the situation where the local flow rate is too slow and the absorbent is not fully effective, thereby maximizing its adsorption or reaction effect and avoiding waste of resources.

[0016] (3) The invention ensures intermittent addition of absorbent by reciprocating the movement of the door, thereby avoiding excessive use, reducing waste and costs, and ensuring that the concentration of the absorbent is maintained at an optimal level, thereby improving the adsorption efficiency and treatment effect of pollutants. The baffle is reciprocated to allow a fixed amount of absorbent to be added each time, ensuring that the pollutants in the leachate and the absorbent reach a suitable ratio, thereby improving the adsorption efficiency and preventing the addition of too much absorbent at one time, which would lead to rapid saturation and a rapid decrease in adsorption capacity, thereby affecting the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the tank body and the collecting plate structure of the present invention; Figure 3 It is a schematic cross-sectional view of the structure of the filter device of the present invention; Figure 4 It is a schematic cross-sectional view of the structure of the rotating wheel and the gear ring of the present invention; Figure 5 It is a schematic cross-sectional view of the structure of the stirring device of the present invention; Figure 6 It is a cross-sectional schematic diagram of the hollow cavity and the slide plate structure of the present invention; Figure 7 It is a schematic cross-sectional view of the structure of the quantitative dosing device of the present invention.

[0018] In the figure: 1. tank body; 2. supporting legs; 3. feed port; 4. collecting plate; 5. motor; 6. reciprocating screw; 7. slider; 8. scraper rod 1; 9. filter plate; 10. gear 1; 11. rotating wheel; 12. gear ring; 13. scraper rod 2; 14. collecting box; 151. fixed plate; 152. rotating rod; 153. gear 2; 154. elastic telescopic rod 1; 155. rack; 156. rotating plate; 157. hollow cavity; 158. slide plate; 159. push rod; 161. medicine box; 162. medicine tube; 163. medicine tank; 164. slide rail; 165. moving door; 166. elastic telescopic rod 2; 167. inclined plane block 1; 168. baffle; 169. inclined plane block 2; 1610. inclined plane rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 7 , one embodiment of the present invention is: a landfill leachate pretreatment device, comprising a tank body 1, a support leg 2 is fixedly installed at the bottom of the tank body 1, a feed port 3 is fixedly installed at the top of the tank body 1, a collecting plate 4 is fixedly installed inside the tank body 1, and a filtering device is arranged inside the tank body 1; The filtering device includes a motor 5, a reciprocating screw 6, a slider 7, a scraper rod 8, a filter plate 9, a gear 10, a rotating wheel 11, a gear ring 12, a scraper rod 2 13 and a collecting box 14. The motor 5 is fixedly mounted on the outer wall of the tank body 1, the reciprocating screw 6 is fixedly mounted on the output end of the motor 5, the slider 7 is slidably mounted on the circumferential surface of the reciprocating screw 6, the scraper rod 8 is fixedly mounted on the bottom of the slider 7, the filter plate 9 is fixedly mounted on the top of the collecting plate 4, the gear 10 is fixedly mounted on the circumferential surface of the reciprocating screw 6 away from the end of the motor 5, the rotating wheel 11 is fixedly mounted on the inner wall of the tank body 1, the gear ring 12 is rotatably mounted on the top of the rotating wheel 11, the scraper rod 2 13 is fixedly mounted on the inner wall of the gear ring 12, and the collecting box 14 is slidably mounted on the bottom of the collecting plate 4. The suspended matter and dirt attached to the surface of the filter plate 9 are removed by the movement of the scraper rod 8, thereby maintaining the permeability of the filter plate 9, while reducing the damage or corrosion of the filter plate 9 caused by the accumulation of dirt, extending the service life of the filter plate 9, and reducing the cost of maintaining and replacing the filter plate 9.

[0021] Scraper rod 1 8 contacts with filter plate 9, gear 10 meshes with gear ring 12, and scraper rod 2 13 contacts with collecting plate 4. Contact ensures that scraper rod 1 8 can clean filter plate 9 when moving, meshing ensures that gear 10 can drive gear ring 12 to rotate when rotating, and contact ensures that scraper rod 2 13 can clean collecting plate 4 when moving.

[0022] When this embodiment is working: first, the staff checks whether the equipment is in good condition, then docks the connecting pipe with the feed port 3, and after confirming that the docking is correct, starts to pass the garbage leachate into the tank body 1, and after the garbage leachate is passed, starts the motor 5, so that the motor 5 drives the reciprocating screw 6 to start rotating, and the reciprocating screw 6 rotates to drive the slider 7 to start moving, and the movement of the slider 7 drives the scraper rod 8 to start moving, and the scraper rod 8 moves to remove the suspended matter and dirt attached to the surface of the filter plate 9, thereby maintaining the permeability of the filter plate 9, while reducing the damage or corrosion of the filter plate 9 caused by the accumulation of dirt, and extending the service life of the filter plate 9. The service life of the filter plate 9 can be prolonged and the cost of maintenance and replacement of the filter plate 9 can be reduced. When the reciprocating screw 6 rotates, the gear 10 is driven to rotate. The rotation of the gear 10 drives the gear ring 12 to rotate. The rotation of the gear ring 12 drives the scraper rod 2 13 to move. The scraper rod 2 13 moves to clean the impurities dropped on the collection plate 4 from the filter plate 9 by the scraper rod 8, so that the impurities or garbage enter the collection box 14, ensuring that these impurities are collected in time to prevent them from blocking the filter plate 9 again, maintaining the permeability and efficient operation of the filtration system, and preventing them from re-entering the treatment system or leaking out, ensuring that the pollutants are effectively controlled.

[0023] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a stirring device is arranged inside the tank body 1, and a quantitative dosing device is arranged inside the tank body 1. The stirring device includes a fixed plate 151, a rotating rod 152, a second gear 153, an elastic telescopic rod 154, a rack 155 and a rotating plate 156. The fixed plate 151 is fixedly mounted on the bottom of the collecting plate 4, the rotating rod 152 rotates and penetrates the fixed plate 151, the second gear 153 is fixedly mounted on the circumferential surface of the rotating rod 152 close to one end of the fixed plate 151, and the elastic telescopic rod 154 is fixedly mounted on the tank The rack 155 is fixedly mounted on the movable end of the elastic telescopic rod 154, and the rotating plate 156 is fixedly mounted on the circumferential surface of the rotating rod 152. The rotating plate 156 rotates forward and reversely to stir the filtered landfill leachate inside the tank body 1, which can effectively increase the contact area and mixing uniformity between the landfill leachate and the absorbent, thereby improving the reaction rate and treatment effect, which helps to accelerate the removal process of pollutants, and at the same time ensures that the absorbent is evenly distributed in the liquid, thereby improving the adsorption efficiency of the adsorbent and ensuring that more pollutants are effectively removed.

[0024] The stirring device also includes a hollow cavity 157, a slide plate 158 and a push rod 159. The hollow cavity 157 is fixedly installed at the bottom of the inner wall of the tank body 1, the slide plate 158 is slidably installed on the inner wall of the hollow cavity 157, and the push rod 159 is fixedly installed on the back of the slide plate 158. The movement of the slide plate 158 accelerates the leachate in the hollow cavity 157 to be pushed outward, which can increase the contact frequency and intensity between the leachate and the absorbent, help to improve the adsorption or reaction rate of pollutants, and enable the absorbent to more efficiently remove harmful substances in the leachate. At the same time, it avoids the situation where the local flow rate is too slow and the absorbent is not fully effective, thereby maximizing its adsorption or reaction effect and avoiding waste of resources.

[0025] Gear 2 153 is meshed with rack 155, and the side where rotating plate 156 and push rod 159 are close to each other is set as an inclined surface. Spring 1 is set between slide plate 158 and the inner wall of hollow cavity 157. The meshing ensures that rack 155 can drive gear 2 153 to rotate when it moves, and the inclined surface is set to ensure that rotating plate 156 can smoothly push push rod 159 when it rotates. Spring 1 is set to ensure that slide plate 158 can achieve self-reset.

[0026] The quantitative dosing device includes a medicine box 161, a medicine tube 162, a medicine tank 163, a slide rail 164, a movable door 165, an elastic telescopic rod 166 and an inclined block 167. The medicine box 161 is fixedly installed on the left side of the tank body 1, the medicine tube 162 is fixedly installed on the left side of the medicine box 161, the medicine tank 163 is fixedly installed on the top of the medicine tube 162, the slide rail 164 is fixedly installed on the inner wall of the tank body 1, the movable door 165 is slidably installed inside the slide rail 164, the fixed end of the elastic telescopic rod 166 is fixedly installed on the inner wall of the tank body 1, the movable end of the elastic telescopic rod 166 is fixedly installed on the top of the movable door 165, and the inclined block 167 is fixedly installed on the right side of the movable door 165. The reciprocating opening of the movable door 165 ensures intermittent addition of the absorbent, which can avoid excessive use, reduce waste and cost, and ensure that the concentration of the absorbent is maintained at an optimal level, thereby improving the adsorption efficiency and treatment effect of pollutants.

[0027] The quantitative dosing device also includes a baffle 168, a ramp block 169 and a ramp rod 1610. The baffle 168 is slidably installed inside the medicine box 161, the ramp block 169 is fixedly installed on the right side of the baffle 168, and the ramp rod 1610 is fixedly installed on the left side of the movable door 165. The baffle 168 is opened and closed reciprocally to allow a fixed amount of absorbent to be added each time, ensuring that the pollutants in the leachate and the absorbent reach a suitable ratio, thereby improving the adsorption efficiency and preventing the addition of too much absorbent at one time, which will cause it to be quickly saturated and the adsorption capacity to drop rapidly, thereby affecting the treatment effect.

[0028] The side of the inclined plane block 167 and the rotating plate 156 that is close to each other is set as an inclined plane, the side of the inclined plane block 2 169 and the inclined plane rod 1610 that is close to each other is set as an inclined plane, and a spring 2 is set between the baffle 168 and the inner wall of the medicine box 161. By setting the inclined plane, it is ensured that the rotating plate 156 can smoothly push the inclined plane block 167 when it rotates, and by setting the inclined plane, it is ensured that the inclined plane rod 1610 can smoothly push the inclined plane block 2 169 when it moves, and by setting the spring 2, it is ensured that the baffle 168 can achieve self-reset.

[0029] When the present embodiment is working, the scraper rod 18 moves and the rack 155 is pushed to start moving, the rack 155 moves and drives the gear 2 153 to start rotating, the gear 2 153 rotates and drives the rotating rod 152 to start rotating, the rotating rod 152 rotates and drives the rotating plate 156 to start rotating, after the scraper rod 18 no longer pushes the rack 155, the rack 155 starts to reset under the action of the elastic telescopic rod 154, the rack 155 moves and resets and drives the gear 2 153 to start rotating in the opposite direction, and the rotating plate 156 rotates forward and backward to stir the filtered garbage leachate inside the tank body 1, which can effectively increase the contact area and mixing uniformity between the garbage leachate and the absorbent, thereby improving the reaction rate and treatment effect, which is helpful to increase the The process of removing pollutants is accelerated, and at the same time, the absorbent is ensured to be evenly distributed in the liquid, thereby improving the adsorption efficiency of the absorbent and ensuring that more pollutants are effectively removed. When the rotating plate 156 rotates, the push rod 159 is pushed to start moving, and the push rod 159 moves to push the slide plate 158 to start moving. The movement of the slide plate 158 accelerates the outward push of the garbage leachate inside the hollow cavity 157, which can increase the contact frequency and intensity between the leachate and the absorbent, and help to improve the adsorption or reaction rate of pollutants, so that the absorbent can more efficiently remove harmful substances in the leachate, and at the same time avoid the situation where the local flow rate is too slow and the absorbent does not act fully, so as to maximize its adsorption or reaction effect and avoid waste of resources.

[0030] As the rotating plate 156 rotates, the inclined plane block 167 is pushed to start moving, and the movement of the inclined plane block 167 drives the moving door 165 to start moving. The moving door 165 moves to open the medicine outlet of the medicine box 161, so that the absorbent flows from the inside of the medicine box 161 to the inside of the tank body 1. When the rotating plate 156 no longer pushes the inclined plane block 167, the moving door 165 starts to reset under the action of the elastic telescopic rod 2 166. The reciprocating opening of the moving door 165 ensures intermittent addition of the absorbent, which can avoid excessive use, reduce waste and cost, and ensure that the concentration of the absorbent is maintained at an optimal level, thereby improving the adsorption efficiency and treatment effect of pollutants. When the moving door 165 moves downward, it drives the inclined plane rod 1610 to start moving, and the inclined plane rod 1610 moves to push the inclined plane block 2 169 The baffle 168 starts to move, and the movement of the inclined plane block 169 drives the baffle 168 to start moving. The baffle 168 moves to open the medicine inlet between the medicine tube 162 and the medicine box 161. After the medicine inlet is opened, the absorbent flows into the medicine box 161 from the inside of the medicine tank 163 through the medicine tube 162, and then drives the inclined plane rod 1610 to start moving when the movable door 165 moves upward. The movement of the inclined plane rod 1610 no longer pushes the inclined plane block 169. At this time, the baffle 168 starts to reset under the action of the spring 2 to cover the medicine inlet. The baffle 168 is opened and closed again to add a fixed amount of absorbent each time, ensuring that the pollutants in the leachate and the absorbent reach a suitable ratio, thereby improving the adsorption efficiency and preventing the rapid saturation caused by adding too much absorbent at one time, and the adsorption capacity decreases rapidly, thereby affecting the treatment effect.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A landfill leachate pretreatment device, comprising a tank body (1), characterized in that: The bottom of the tank body (1) is fixedly provided with a support leg (2), the top of the tank body (1) is fixedly provided with a feed port (3), the interior of the tank body (1) is fixedly provided with a collecting plate (4), the interior of the tank body (1) is provided with a filtering device, the interior of the tank body (1) is provided with a stirring device, and the interior of the tank body (1) is provided with a quantitative dosing device; The filtering device comprises a motor (5), a reciprocating screw (6), a slider (7), a scraper rod (8), a filter plate (9), a gear (10), a rotating wheel (11), a gear ring (12), a scraper rod (13) and a collection box (14); the motor (5) is fixedly mounted on the outer wall of the tank body (1); the reciprocating screw (6) is fixedly mounted on the output end of the motor (5); the slider (7) is slidably mounted on the circumferential surface of the reciprocating screw (6); the scraper rod (8) is fixedly mounted on the bottom of the slider (7); the filter plate (9) is fixedly mounted on the top of the collection plate (4); the gear (10) is fixedly mounted on the circumferential surface of the reciprocating screw (6) away from the motor (5); the rotating wheel (11) is fixedly mounted on the inner wall of the tank body (1); the gear ring (12) is rotatably mounted on the top of the rotating wheel (11); the scraper rod (13) is fixedly mounted on the inner wall of the gear ring (12); and the collection box (14) is slidably mounted on the bottom of the collection plate (4).

2. A landfill leachate pretreatment device according to claim 1, characterized in that: The scraper rod 1 (8) is in contact with the filter plate (9), the gear 1 (10) is meshed with the gear ring (12), and the scraper rod 2 (13) is in contact with the collecting plate (4).

3. A landfill leachate pretreatment device according to claim 2, characterized in that: The stirring device comprises a fixed plate (151), a rotating rod (152), a second gear (153), an elastic telescopic rod (154), a rack (155) and a rotating plate (156); the fixed plate (151) is fixedly mounted on the bottom of the collecting plate (4); the rotating rod (152) rotates and penetrates the fixed plate (151); the second gear (153) is fixedly mounted on the circumferential surface of the rotating rod (152) close to one end of the fixed plate (151); the elastic telescopic rod (154) is fixedly mounted on the inner wall of the tank body (1); the rack (155) is fixedly mounted on the movable end of the elastic telescopic rod (154); and the rotating plate (156) is fixedly mounted on the circumferential surface of the rotating rod (152).

4. The landfill leachate pretreatment device according to claim 3, characterized in that: The stirring device further comprises a hollow cavity (157), a slide plate (158) and a push rod (159); the hollow cavity (157) is fixedly mounted on the bottom of the inner wall of the tank body (1); the slide plate (158) is slidably mounted on the inner wall of the hollow cavity (157); and the push rod (159) is fixedly mounted on the back of the slide plate (158).

5. The landfill leachate pretreatment device according to claim 4, characterized in that: The second gear (153) is meshed with the rack (155); a surface of the rotating plate (156) and the push rod (159) that is close to each other is arranged as an inclined surface; and a first spring is arranged between the slide plate (158) and the inner wall of the hollow cavity (157).

6. The landfill leachate pretreatment device according to claim 5, characterized in that: The quantitative dosing device comprises a medicine box (161), a medicine tube (162), a medicine tank (163), a slide rail (164), a movable door (165), a second elastic telescopic rod (166) and a first inclined plane block (167). The medicine box (161) is fixedly mounted on the left side of the tank body (1), the medicine tube (162) is fixedly mounted on the left side of the medicine box (161), the medicine tank (163) is fixedly mounted on the top of the medicine tube (162), the slide rail (164) is fixedly mounted on the inner wall of the tank body (1), the movable door (165) is slidably mounted inside the slide rail (164), the fixed end of the second elastic telescopic rod (166) is fixedly mounted on the inner wall of the tank body (1), the movable end of the second elastic telescopic rod (166) is fixedly mounted on the top of the movable door (165), and the first inclined plane block (167) is fixedly mounted on the right side of the movable door (165).

7. The landfill leachate pretreatment device according to claim 6, characterized in that: The quantitative dosing device further comprises a baffle (168), a second inclined plane block (169) and an inclined plane rod (1610); the baffle (168) is slidably mounted inside the medicine box (161); the second inclined plane block (169) is fixedly mounted on the right side of the baffle (168); and the inclined plane rod (1610) is fixedly mounted on the left side of the movable door (165).

8. The landfill leachate pretreatment device according to claim 7, characterized in that: The surface of the inclined plane block 1 (167) and the rotating plate (156) that are close to each other is set as an inclined plane, the surface of the inclined plane block 2 (169) and the inclined plane rod (1610) that are close to each other is set as an inclined plane, and a second spring is provided between the baffle plate (168) and the inner wall of the medicine box (161).

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