Landfill leachate multi-stage treatment device

Abstract

The utility model discloses a multi-stage treatment device for landfill leachate, which particularly relates to the technical field of landfill leachate treatment and comprises a landfill leachate treatment box, and the outer wall of the top of the landfill leachate treatment box is communicated with a leachate input square pipe. A drainage pipe is arranged on the side, away from the leachate input square pipe, of the bottom of the landfill leachate treatment box, a valve is installed on the drainage pipe, and a plurality of cleaning net racks are inserted into the leachate input square pipe at equal intervals. According to the utility model, the plurality of detachable cleaning net racks are arranged to carry out multi-time layered filtration on the percolate, part of impurities can remain in the cleaning net racks by utilizing the obstruction of the filter screens with different pore diameters, and the arranged cleaning net racks are convenient to take out from the interior of the percolate input square pipe, so that the filtered impurities are convenient to clean, and the filtering efficiency is improved. And the subsequent multi-stage purification treatment on the leachate can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage leachate treatment, and more specifically, to a garbage leachate multi-stage treatment device. Background Art

[0002] Leachate refers to a high-concentration organic wastewater formed by the moisture contained in the garbage itself in the landfill, the rain and snow water entering the landfill, and other moisture, minus the saturated water holding capacity of the garbage and covering soil layers, and passing through the garbage layer and covering soil layer. If it is discharged directly into the environment without treatment, it will cause serious environmental pollution. In order to protect the environment, it is essential to treat the leachate.

[0003] After searching, the multi-stage treatment device for leachate disclosed in the Chinese patent with publication number CN216997910U not only facilitates users to replace the filter material regularly, but also facilitates users to clean the treatment box and the filter material at any time, thereby greatly improving the treatment effect and quality of the treatment device, effectively reducing the problem of impurities accumulating in the treatment box and causing difficulty in cleaning, and bringing convenience to the user's cleaning work, further meeting the needs of use and improving the effect of use.

[0004] However, when the above-mentioned multi-stage leachate treatment device is actually used, the main structure adopts a multi-level sealing frame structure, which simply performs multi-layer filtration, and each layer of the sealing frame needs to be manually removed during operation. There is a lack of subsequent leachate purification treatment, and direct discharge to the external environment is not ideal. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a multi-stage treatment device for landfill leachate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage treatment device for landfill leachate, comprising a landfill leachate treatment box, the top outer wall of the landfill leachate treatment box is connected to a leachate input square pipe, and a drain pipe is arranged on the bottom side of the landfill leachate treatment box away from the leachate input square pipe, a valve is installed on the drain pipe, a plurality of cleaning grids are inserted at equal intervals inside the leachate input square pipe, a first vertical partition is fixedly arranged in the vertical direction on the side of the landfill leachate treatment box close to the leachate input square pipe, and a second vertical partition, a third vertical partition, a fourth vertical partition, a fifth vertical partition and a sixth vertical partition are arranged in sequence on one side of the first vertical partition along the horizontal direction from the leachate input square pipe to the drain pipe, a purification box is installed between the first vertical partition and the inner wall of the landfill leachate treatment box, and the The purification box is arranged at a position below the end of the leachate input square pipe, and a filtering and purification mechanism is arranged inside the purification box. A water filtering area is arranged inside the garbage leachate treatment box below the purification box. A first transverse partition is fixedly connected between the bottom inner walls of the second vertical partition and the third vertical partition. A sedimentation area is arranged above the first transverse partition inside the garbage leachate treatment box. A second transverse partition is fixedly arranged between the bottom inner walls of the fourth vertical partition and the fifth vertical partition. A drug-adding purification area is arranged above the second transverse partition inside the garbage leachate treatment box. A drug-adding mechanism is arranged at the top of the garbage leachate treatment box at the top position of the drug-adding purification area. A stirring mechanism is arranged at the bottom of the drug-adding purification area. A buffer area is arranged between the sixth vertical partition and the inner wall of the garbage leachate treatment box. A control switch is installed on the outer wall of the garbage leachate treatment box.

[0007] As a further improvement of the technical solution of the utility model, the cleaning grid includes a top plate arranged on the top of the leachate input square tube, a lifting handle is arranged on the top of the top plate, a coarse-pore filter screen and a fine-pore filter screen are respectively arranged at the bottom of both ends of the top plate, the coarse-pore filter screen is arranged on the side away from the garbage leachate treatment box, and a V-shaped filter screen is connected between the bottom of the coarse-pore filter screen and the fine-pore filter screen.

[0008] As a further improvement of the technical solution of the utility model, a V-shaped groove is provided at the bottom of the leachate input square tube corresponding to the installation position of the V-shaped filter screen, and a through hole for cleaning and placing the grid frame is provided at the top of the leachate input square tube, and the pore size of the coarse-pore filter screen is larger than the pore size of the fine-pore filter screen.

[0009] As a further improvement of the technical solution of the utility model, the filtering and purification mechanism includes a pebble layer, a first quartz sand layer, an activated carbon layer, a second quartz sand layer and a cotton cloth pad layer which are arranged in sequence from top to bottom inside the purification box, and a metal mesh plate is arranged at the bottom of the purification box below the cotton cloth pad layer, and support blocks are fixedly arranged on the inner wall of the garbage leachate treatment box and the outer wall of the first vertical partition at the bottom position of the purification box.

[0010] As a further improvement of the technical solution of the present utility model, a first water pump is installed inside the garbage leachate treatment box between the bottom of the first vertical partition and the second vertical partition, the liquid inlet end of the first water pump is connected to the first water pumping pipe, one end of the first water pumping pipe extends to the inside of the water filtration area, and a first water outlet pipe is connected between the liquid outlet end of the first water pump and the top of the sedimentation area; a second water pump is installed inside the garbage leachate treatment box below the first horizontal partition, a second water pumping pipe is connected between the liquid inlet end of the second water pump and the middle of the sedimentation area, and a second water outlet pipe is connected between the liquid outlet end of the second water pump and the top of the drug-adding purification area; a third water pump is installed inside the garbage leachate treatment box between the bottom of the fifth vertical partition and the sixth vertical partition, a third water pumping pipe is connected between the liquid inlet end of the third water pump and the bottom of the drug-adding purification area, and a third water outlet pipe is connected between the liquid outlet end of the third water pump and the top of the buffer area.

[0011] As a further improvement of the technical solution of the utility model, the drug adding mechanism includes a drug storage hopper arranged above the top of the garbage leachate treatment box, the bottom of the drug storage hopper is connected to a drug drop pipe, the bottom of the drug drop pipe extends to the interior of the garbage leachate treatment box and is connected to a horizontally arranged drug delivery pipe, a cylinder is arranged inside the drug delivery pipe below the drug drop pipe, the outer wall of the end of the cylinder is located inside the drug delivery pipe and is fixedly connected with a movable block, a cylinder for driving the movable block to move horizontally is installed on one side of the movable block, and the cylinder is fixedly connected to the top inner wall of the garbage leachate treatment box through a mounting frame.

[0012] As a further improvement of the technical solution of the utility model, the stirring mechanism includes a stirring blade installed at the bottom of the dosing purification area, and a motor for driving the stirring blade to rotate is fixedly installed at the bottom of the second transverse partition.

[0013] Beneficial effects of the utility model:

[0014] 1. Multiple levels of filtration are performed by setting up multiple detachable cleaning racks, and the filter screens with different apertures are used to block the impurities so that some impurities can remain inside the cleaning racks. The cleaning racks are convenient for taking out the leachate from the inside of the square tube, thereby facilitating the cleaning of the filtered impurities;

[0015] 2. By setting a filtering and purification mechanism inside the purification box, it is convenient to filter and purify the water entering the landfill leachate treatment box, reduce some impurities and harmful substances from continuing to flow into the subsequent treatment area, and the dosing mechanism is convenient to quantitatively put the medicine powder into the dosing purification area to mix with the water, and use the stirring mechanism at the bottom to mix the water and medicine in the dosing purification area, accelerate the dissolution and diffusion speed of the medicine, and improve the efficiency of dosing purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the cleaning grid in the utility model.

[0018] Figure 3 For this utility model Figure 1 Enlarged view of part A.

[0019] Figure 4 It is a structural schematic diagram of the medicine adding mechanism in the utility model.

[0020] Figure 5 It is a schematic diagram of the connection structure between the movable block and the cylinder in the utility model.

[0021] The accompanying drawings are marked as follows: 1. garbage leachate treatment box; 2. leachate input square pipe; 3. cleaning grid; 4. control switch; 5. first vertical partition; 6. purification box; 7. support block; 8. water filtering area; 9. second vertical partition; 10. third vertical partition; 11. fourth vertical partition; 12. fifth vertical partition; 13. sixth vertical partition; 14. first horizontal partition; 15. sedimentation area; 16. second horizontal partition; 17. dosing purification area; 18. buffer area; 19. first water pump; 20. first water pumping pipe; 21. first water outlet pipe; 22. second water pump; 23. second water pumping pipe; 24. second water outlet pipe; 25 , motor; 26, stirring blade; 27, third water pump; 28, third water suction pipe; 29, third water outlet pipe; 30, drain pipe; 31, valve; 32, medicine storage hopper; 33, medicine drop pipe; 34, medicine delivery pipe; 35, movable block; 36, cylinder; 37, cylinder; 201, V-shaped groove; 202, through hole; 301, coarse-pore filter; 302, fine-pore filter; 303, V-shaped filter; 304, top plate; 305, lifting handle; 601, pebble layer; 602, first quartz sand layer; 603, activated carbon layer; 604, second quartz sand layer; 605, cotton cloth pad layer; 606, metal mesh plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] As attached Figure 1-5 The multi-stage treatment device for landfill leachate shown in the figure comprises a landfill leachate treatment box 1, the top outer wall of the landfill leachate treatment box 1 is connected with a leachate input square pipe 2, and a drainage pipe 30 is arranged on the bottom side of the landfill leachate treatment box 1 away from the leachate input square pipe 2, a valve 31 is installed on the drainage pipe 30, a plurality of cleaning grids 3 are inserted at equal intervals inside the leachate input square pipe 2, a first vertical partition 5 is fixedly arranged in the vertical direction on the side of the landfill leachate treatment box 1 close to the leachate input square pipe 2, and a second vertical partition 9, a third vertical partition 10, a fourth vertical partition 11, a fifth vertical partition 12 and a sixth vertical partition 13 are arranged in sequence on one side of the first vertical partition 5 along the horizontal direction from the leachate input square pipe 2 to the drainage pipe 30 inside the landfill leachate treatment box 1, a purification box 6 is installed between the first vertical partition 5 and the inner wall of the landfill leachate treatment box 1, and the purification box 6 is arranged close to the leachate input square pipe 2. A filtering and purification mechanism is provided inside the purification box 6 at a position below the end of the leachate input square tube 2, a water filtering area 8 is provided inside the garbage leachate treatment box 1 below the purification box 6, a first transverse partition 14 is fixedly connected between the bottom inner walls of the second vertical partition 9 and the third vertical partition 10, a sedimentation area 15 is provided inside the garbage leachate treatment box 1 above the first transverse partition 14, a second transverse partition 16 is fixedly provided between the bottom inner walls of the fourth vertical partition 11 and the fifth vertical partition 12, a dosing purification area 17 is provided inside the garbage leachate treatment box 1 above the second transverse partition 16, a dosing mechanism is provided at the top of the garbage leachate treatment box 1 at the top position of the dosing purification area 17, a stirring mechanism is provided at the bottom of the dosing purification area 17, a buffer area 18 is provided between the sixth vertical partition 13 and the inner wall of the garbage leachate treatment box 1, and a control switch 4 is installed on the outer wall of the garbage leachate treatment box 1.

[0024] As attached Figure 1-2As shown, the cleaning grid 3 includes a top plate 304 arranged on the top of the leachate input square tube 2, a lifting handle 305 is arranged on the top of the top plate 304, and a coarse-pore filter 301 and a fine-pore filter 302 are respectively arranged at the bottom of both ends of the top plate 304. The coarse-pore filter 301 is arranged on the side away from the garbage leachate treatment box 1, and a V-shaped filter 303 is connected between the bottom of the coarse-pore filter 301 and the fine-pore filter 302. The bottom of the leachate input square tube 2 is provided with a V-shaped groove 20 corresponding to the installation position of the V-shaped filter 303. 1, and a through hole 202 for taking out and placing the cleaning grid frame 3 is provided at the top of the leachate input square tube 2, and the pore size of the coarse-pore filter 301 is larger than the pore size of the fine-pore filter 302, so that when in use, the leachate input by the leachate input square tube 2 can be filtered multiple times through multiple cleaning grid frames 3, and the blocking of the filters with different pore sizes can make some impurities remain in the inside of the cleaning grid frame 3. The cleaning grid frame 3 is convenient to take out from the inside of the leachate input square tube 2, so as to facilitate the cleaning of the filtered impurities.

[0025] As attached Figure 1 and attached Figure 3 As shown, the filtering and purification mechanism includes a pebble layer 601, a first quartz sand layer 602, an activated carbon layer 603, a second quartz sand layer 604 and a cotton cloth pad layer 605 which are arranged in sequence from top to bottom inside the purification box 6. A metal mesh plate 606 is arranged at the bottom of the purification box 6 below the cotton cloth pad layer 605. The inner wall of the garbage leachate treatment box 1 and the outer wall of the first vertical partition 5 are fixedly provided with support blocks 7 at the bottom position of the purification box 6, so as to facilitate filtering and purifying the water entering the garbage leachate treatment box 1 when in use, thereby reducing some impurities and harmful substances from continuing to flow into the subsequent treatment area.

[0026] As attached Figure 1 As shown, a first water pump 19 is installed inside the garbage leachate treatment box 1 between the bottom of the first vertical partition 5 and the second vertical partition 9, the liquid inlet end of the first water pump 19 is connected to a first pumping pipe 20, one end of the first pumping pipe 20 extends to the inside of the water filtration area 8, a first outlet pipe 21 is connected between the liquid outlet end of the first water pump 19 and the top of the sedimentation area 15, a second water pump 22 is installed inside the garbage leachate treatment box 1 below the first horizontal partition 14, the liquid inlet end of the second water pump 22 is connected to the middle of the sedimentation area 15 A second pumping pipe 23 is provided, and a second outlet pipe 24 is provided between the liquid outlet end of the second water pump 22 and the top of the dosing purification zone 17; a third water pump 27 is installed inside the garbage leachate treatment box 1 between the bottom of the fifth vertical partition 12 and the sixth vertical partition 13; a third pumping pipe 28 is provided between the liquid inlet end of the third water pump 27 and the bottom of the dosing purification zone 17; and a third outlet pipe 29 is provided between the liquid outlet end of the third water pump 27 and the top of the buffer zone 18, so as to facilitate the transportation of water to multiple treatment areas during use.

[0027] As attached Figure 1 and attached Figure 4-5 As shown, the drug adding mechanism includes a drug storage hopper 32 arranged above the top of the garbage leachate treatment box 1, the bottom of the drug storage hopper 32 is connected to a drug drop pipe 33, the bottom of the drug drop pipe 33 extends to the inside of the garbage leachate treatment box 1 and is connected to a horizontally arranged drug delivery pipe 34, the inside of the drug delivery pipe 34 is located below the drug drop pipe 33 and is provided with a cylinder 36, the end outer wall of the cylinder 36 is located inside the drug delivery pipe 34 and is fixedly connected with a movable block 35, a cylinder 37 for driving the movable block 35 to move horizontally is installed on one side of the movable block 35, and the cylinder 37 is fixedly connected to the top inner wall of the garbage leachate treatment box 1 through a mounting frame. When the provided drug adding and purification mechanism is in use, the operator places the drug inside the drug storage hopper 32. When drug adding is required, the drug powder itself will fall into the inside of the cylinder 36. Since the internal space of the cylinder 36 itself is fixed, for powder drugs, the amount of drug powder entering the cylinder 36 each time is relatively small, that is, the drug powder can be quantitatively dosed. By controlling the cylinder 37 to push the movable block 35 to move horizontally, the cylinder 36 is driven to move horizontally and gradually move out to the outside of the drug delivery tube 34. At this time, the bottom of the cylinder 36 lacks obstruction, and the drug powder can directly fall from the inside of the cylinder 36 into the drug adding and purification area 17 to mix with water.

[0028] As attached Figure 1 As shown, the stirring mechanism includes a stirring blade 26 installed at the bottom of the drug-dosing purification area 17, and a motor 25 for driving the stirring blade 26 to rotate is fixedly installed at the bottom of the second transverse partition 16. When in use, the motor 25 is started to drive the stirring blade 26 to rotate to stir the water inside the drug-dosing purification area 17, thereby accelerating the dissolution and diffusion rate of the drug and improving the efficiency of drug-dosing purification.

[0029] Working principle: This utility model designs a multi-stage treatment device for landfill leachate. The specific structure is as shown in the attached manual. Figure 1-5As shown, in the present technical scheme, firstly, the landfill leachate is transported from the inside of the leachate input square tube 2 to the inside of the landfill leachate treatment box 1. During the transportation process, multiple levels of filtration are performed through a plurality of detachable cleaning racks 3. The filter screens with different apertures are used for blocking, so that some impurities can remain in the cleaning racks 3. The cleaning racks 3 are convenient for taking out from the inside of the leachate input square tube 2, and then the filtered impurities are convenient for cleaning. Secondly, after the preliminary filtration, the liquid enters the inside of the landfill leachate treatment box 1 and first enters the inside of the purification box 6. The filtering and purification mechanism inside the purification box 6 filters and purifies the water entering the landfill leachate treatment box 1 to reduce some impurities and harmful substances from continuing to flow into the subsequent treatment area. The filtered and purified liquid enters the inside of the water filtration area 8, and is pumped to the inside of the sedimentation area 15 by the first water pump 19 to stand for a period of time. The sedimentation treatment is carried out for a period of time, and then the supernatant water at the top of the sedimentation area 15 is pumped into the interior of the dosing purification area 17 by the second water pump 22. (For the sediment, the sewage pump in the prior art can be used to directly pump it out. The sewage pump is arranged on the outside of the landfill leachate treatment box 1. The sewage pipe is inserted into the bottom of the sedimentation area 15 and the sewage pump is started to pump it out. This part belongs to the commonly used sewage discharge method in the prior art and does not belong to the technical feature to be protected by this application, so it is not shown in the figure). The medicine powder is added into the interior of the dosing purification area 17 by the dosing mechanism, and the stirring mechanism at the bottom is used to mix the water and medicine in the dosing purification area 17 to accelerate the dissolution and diffusion speed of the medicine and improve the efficiency of the dosing purification. After the dosing purification, the water in the dosing purification area 17 is pumped into the buffer area 18 by the third water pump 27, which is convenient for the subsequent opening of the valve to discharge.

[0030] Among them, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A multi-stage treatment device for landfill leachate, comprising a landfill leachate treatment box (1), wherein the top outer wall of the landfill leachate treatment box (1) is connected to a leachate input square pipe (2), and a drainage pipe (30) is arranged at the bottom of the landfill leachate treatment box (1) away from the leachate input square pipe (2), and a valve (31) is installed on the drainage pipe (30), characterized in that: A plurality of cleaning grid frames (3) are inserted at equal intervals inside the leachate input square pipe (2); a first vertical partition (5) is fixedly arranged in the vertical direction on the side of the leachate input square pipe (2) inside the garbage leachate treatment box (1); and a second vertical partition (9), a third vertical partition (10), a fourth vertical partition (11), a fifth vertical partition (12) and a sixth vertical partition (13) are arranged in sequence inside the garbage leachate treatment box (1) on the side of the first vertical partition (5) along the horizontal direction from the leachate input square pipe (2) to the drainage pipe (30); a purification box (6) is installed between the first vertical partition (5) and the inner wall of the garbage leachate treatment box (1); the purification box (6) is arranged at a position below the end of the leachate input square pipe (2); a filtering and purification mechanism is arranged inside the purification box (6); and the interior of the garbage leachate treatment box (1) is located at the purification box (6). A water filtering area (8) is arranged at the bottom, a first transverse partition (14) is fixedly connected between the bottom inner walls of the second vertical partition (9) and the third vertical partition (10), a sedimentation area (15) is arranged above the first transverse partition (14) inside the garbage leachate treatment box (1), a second transverse partition (16) is fixedly arranged between the bottom inner walls of the fourth vertical partition (11) and the fifth vertical partition (12), a drug addition purification area (17) is arranged above the second transverse partition (16) inside the garbage leachate treatment box (1), a drug addition mechanism is arranged at the top position of the drug addition purification area (17) at the top of the garbage leachate treatment box (1), a stirring mechanism is arranged at the bottom of the drug addition purification area (17), a buffer area (18) is arranged between the sixth vertical partition (13) and the inner wall of the garbage leachate treatment box (1), and a control switch (4) is installed on the outer wall of the garbage leachate treatment box (1).

2. The multi-stage treatment device for landfill leachate according to claim 1, characterized in that: The cleaning grid frame (3) comprises a top plate (304) arranged on the top of the leachate input square tube (2), a lifting handle (305) being arranged on the top of the top plate (304), a coarse-pore filter (301) and a fine-pore filter (302) being arranged at the bottom of both ends of the top plate (304), the coarse-pore filter (301) being arranged on a side away from the garbage leachate treatment box (1), and a V-shaped filter (303) being connected between the bottoms of the coarse-pore filter (301) and the fine-pore filter (302).

3. The multi-stage treatment device for landfill leachate according to claim 2, characterized in that: A V-shaped groove (201) is provided at the bottom of the leachate input square tube (2) corresponding to the installation position of the V-shaped filter screen (303), and a through hole (202) for cleaning and placing the grid frame (3) is provided at the top of the leachate input square tube (2), and the pore size of the coarse-pore filter screen (301) is larger than the pore size of the fine-pore filter screen (302).

4. The multi-stage treatment device for landfill leachate according to claim 1, characterized in that: The filtering and purifying mechanism comprises a pebble layer (601), a first quartz sand layer (602), an activated carbon layer (603), a second quartz sand layer (604) and a cotton pad layer (605) which are arranged in order from top to bottom inside the purification box (6); a metal mesh plate (606) is arranged at the bottom of the purification box (6) below the cotton pad layer (605); and a support block (7) is fixedly arranged on the inner wall of the garbage leachate treatment box (1) and the outer wall of the first vertical partition (5) at the bottom position of the purification box (6).

5. The multi-stage treatment device for landfill leachate according to claim 1, characterized in that: A first water pump (19) is installed inside the garbage leachate treatment box (1) between the bottom of the first vertical partition (5) and the second vertical partition (9); a first water pump (20) is connected to the liquid inlet of the first water pump (19); one end of the first water pump (20) extends to the inside of the water filtration area (8); a first water outlet pipe (21) is connected between the liquid outlet of the first water pump (19) and the top of the sedimentation area (15); a second water pump (22) is installed inside the garbage leachate treatment box (1) below the first horizontal partition (14); the liquid inlet of the second water pump (22) is connected to the liquid outlet of the first water pump (19); A second pumping pipe (23) is connected between the end and the middle of the sedimentation zone (15), and a second outlet pipe (24) is connected between the liquid outlet end of the second water pump (22) and the top of the dosing purification zone (17). A third water pump (27) is installed inside the garbage leachate treatment box (1) between the bottom of the fifth vertical partition (12) and the sixth vertical partition (13), a third pumping pipe (28) is connected between the liquid inlet end of the third water pump (27) and the bottom of the dosing purification zone (17), and a third outlet pipe (29) is connected between the liquid outlet end of the third water pump (27) and the top of the buffer zone (18).

6. The multi-stage treatment device for landfill leachate according to claim 1, characterized in that: The dosing mechanism comprises a drug storage hopper (32) arranged above the top of the landfill leachate treatment box (1); the bottom of the drug storage hopper (32) is connected to a drug drop pipe (33); the bottom of the drug drop pipe (33) extends to the inside of the landfill leachate treatment box (1) and is connected to a horizontally arranged drug delivery pipe (34); a cylinder (36) is arranged inside the drug delivery pipe (34) below the drug drop pipe (33); a movable block (35) is fixedly connected to the outer wall of the end of the cylinder (36) located inside the drug delivery pipe (34); a cylinder (37) for driving the movable block (35) to move horizontally is installed on one side of the movable block (35); and the cylinder (37) is fixedly connected to the inner wall of the top of the landfill leachate treatment box (1) via a mounting frame.

7. The multi-stage treatment device for landfill leachate according to claim 1, characterized in that: The stirring mechanism comprises a stirring blade (26) installed at the bottom of the dosing purification zone (17), and a motor (25) for driving the stirring blade (26) to rotate is fixedly installed at the bottom of the second transverse partition (16).

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