A device for treating leachate from a landfill

Abstract

The utility model discloses a kind of leachate treatment devices of waste landfill, a kind of leachate treatment devices of waste landfill, including dilution pond, the dilution pond one end is fixedly connected with stirring assembly, and dilution pond is fixedly connected with first wave weir on the side close to stirring assembly, the side of stirring assembly is fixedly connected with drain pool, and the two inner walls on the side close to stirring assembly of drain pool are fixedly connected with second wave weir, the one end of drain pool is fixedly connected with drain pipe, the one end of drain pipe is provided with water pump. The utility model is provided with cylinder grating and scraper assembly, realizes the sustained cleaning of filter screen in leachate treatment process, effectively prevent mesh blockage, ensure the smooth flow of leachate, significantly improve processing efficiency;By being provided with stirring assembly, the way of mechanical stirring and pneumatic stirring is combined;By the rotation of stirring vane and the action of fine bubble, full-pool range is realized sufficient mixing.

Description

Technical Field

[0001] This utility model relates to the field of leachate treatment technology, and in particular to a leachate treatment device for landfills. Background Technology

[0002] Landfill leachate refers to a high-concentration organic wastewater formed from the moisture contained in the landfill itself, rainwater and snowmelt entering the landfill, and other moisture, after deducting the saturated water holding capacity of the landfill and the topsoil layer, and passing through the landfill and topsoil layers. However, under the current technology, there are many problems in the treatment of leachate.

[0003] A search revealed Chinese Patent Publication No. CN219922201 U, a utility model disclosing a landfill leachate treatment device. The device relates to the technical field of leachate treatment. A longitudinally arranged mounting base is welded to the left outer wall of the filter cylinder. Two support plates, arranged front and rear, are welded to the top surface of the mounting base. A rotating shaft is rotatably mounted between the two support plates. An L-plate is welded to the rotating shaft, and the upper end of the L-plate is welded to the left outer wall of the enclosure. The output shaft of the drive mechanism is connected to the rear end of the rotating shaft. A vertical plate is fixed to the top surface of the right side wall of the enclosure. A reciprocating electric cylinder is fixed to the right end of the vertical plate. The piston rod of the reciprocating electric cylinder passes through the vertical plate and extends into the enclosure. A push plate is welded to the extended end of the piston rod. Multiple spaced scrapers are welded to the bottom surface of the push plate, and the bottom surface of each scraper contacts the top surface of the filter screen. The advantages of this utility model are: reduced worker workload, improved leachate treatment efficiency, and simple operation. However, the above-mentioned landfill leachate treatment device has the following shortcomings:

[0004] Because this patent lacks a mechanism for pre-treating the leachate, it will lead to excessive load on the subsequent processing equipment, increasing the burden on the equipment and raising the damage rate. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a landfill leachate treatment device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A landfill leachate treatment device includes a dilution tank, a stirring assembly fixedly connected to one end of the dilution tank, a first wave weir fixedly connected to the side of the dilution tank near the stirring assembly, a drainage tank fixedly connected to one side of the stirring assembly, a second wave weir fixedly connected to the two inner walls of the drainage tank near the stirring assembly, a drainage pipe fixedly connected to one end of the drainage tank, and a water pump installed at one end of the drainage pipe.

[0008] As a further embodiment of this utility model: a feeding assembly is fixedly connected to one side of the outer wall of the dilution tank, and a first rotating motor is fixedly connected to the other side of the dilution tank. A drum grid is fixedly connected to the output end of the first rotating motor, and a water inlet assembly is fixedly connected to the outer wall of the dilution tank near the first rotating motor.

[0009] As a further embodiment of this utility model: the stirring assembly includes a stirring tank, a support is fixedly connected to the top of the stirring tank, an air pump is fixedly connected to the support, and an air guide pipe is fixedly connected to the output end of the air pump. The stirring tank is fixedly connected between the dilution tank and the drainage tank.

[0010] As a further embodiment of this utility model: the bottom end of the air guide pipe is rotatably connected to a stirring blade, the top end of the stirring blade is fixedly connected to three or more air outlet pipes, and the bottom of the stirring tank is fixedly connected to a porous ceramic block.

[0011] As a further embodiment of this utility model: the stirring blade is rotatably connected to the inner cavity of the porous ceramic block, and a second rotating motor is fixedly connected to the bottom of the inner cavity of the porous ceramic block, and the output end of the second rotating motor is fixedly connected to the bottom of the stirring blade.

[0012] As a further embodiment of this utility model: the feeding assembly includes a first water storage tank, which is fixedly connected to one side of the dilution tank, and a first submersible pump is provided at the bottom of the first water storage tank. The output end of the first submersible pump is fixedly connected to a first water inlet pipe, and one end of the first water inlet pipe passes through the dilution tank and extends to the inner cavity of the drum grid.

[0013] As a further embodiment of this utility model: the water inlet assembly includes a second water storage tank, which is fixedly connected to one side of the dilution tank, and a second submersible pump is fixedly connected to the bottom of the second water storage tank. The output end of the second submersible pump is fixedly connected to a second water inlet pipe, and one end of the second water inlet pipe passes through the dilution tank and extends into the inner cavity of the dilution tank.

[0014] Compared with the prior art, this utility model provides a leachate treatment device for landfills, which has the following beneficial effects:

[0015] 1. This landfill leachate treatment device, by being equipped with a roller grid and scraper assembly, enables continuous cleaning of the filter screen during the leachate treatment process, effectively preventing screen blockage, ensuring smooth flow of leachate, and significantly improving treatment efficiency.

[0016] 2. This landfill leachate treatment device, by being equipped with a stirring component, adopts a combination of mechanical and pneumatic stirring. Through the rotation of the stirring blades and the action of microbubbles, it achieves thorough mixing throughout the entire pool, greatly enhancing the treatment effect.

[0017] 3. This landfill leachate treatment device, by setting porous ceramic block biological packing material, provides a large number of attachment surfaces for microbial growth, promotes the biodegradation process of organic matter, and effectively improves the biodegradability of wastewater.

[0018] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a landfill leachate treatment device proposed in this utility model.

[0020] Figure 2 This is a partial structural diagram of the stirring assembly of a landfill leachate treatment device proposed in this utility model;

[0021] Figure 3 This is a cross-sectional view of the stirring assembly of a landfill leachate treatment device proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the feeding component structure of a landfill leachate treatment device proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the water inlet component of a landfill leachate treatment device proposed in this utility model.

[0024] In the diagram: 1. Dilution tank; 2. First wave weir; 3. Second wave weir; 4. Mixing assembly; 5. Drainage tank; 6. Feeding assembly; 7. Water inlet assembly; 8. Drum bar; 9. First rotating motor; 10. Drain pipe; 11. Water pump; 41. Second rotating motor; 42. Porous ceramic block; 43. Air pump; 44. Support; 45. Mixing blade; 46. Mixing tank; 47. Air guide pipe; 61. First water storage tank; 62. First submersible pump; 63. First water inlet pipe; 71. Second water storage tank; 72. Second submersible pump; 73. Second water inlet pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] A landfill leachate treatment device, such as Figure 1 As shown, the system includes a dilution tank 1, one end of which is fixedly connected to a stirring assembly 4, and a first wave weir 2 is fixedly connected to the side of the dilution tank 1 near the stirring assembly 4. A drainage tank 5 is fixedly connected to one side of the stirring assembly 4, and a second wave weir 3 is fixedly connected to the two inner walls of the drainage tank 5 near the stirring assembly 4. A drainage pipe 10 is fixedly connected to one end of the drainage tank 5, and a water pump 11 is installed at one end of the drainage pipe 10.

[0029] like Figure 1 and Figure 5 As shown, a feeding assembly 6 is fixedly connected to one side of the outer wall of the dilution tank 1, and a first rotating motor 9 is fixedly connected to the other side of the dilution tank 1. A drum grid 8 is fixedly connected to the output end of the first rotating motor 9, and a water inlet assembly 7 is fixedly connected to the outer wall of the dilution tank 1 near the first rotating motor 9.

[0030] like Figure 2 and Figure 3 As shown, the stirring assembly 4 includes a stirring tank 46, a support 44 is fixedly connected to the top of the stirring tank 46, an air pump 43 is fixedly connected to the support 44, and an air guide pipe 47 is fixedly connected to the output end of the air pump 43. The stirring tank 46 is fixedly connected between the dilution tank 1 and the drainage tank 5.

[0031] like Figure 2 and Figure 3 As shown, the bottom end of the air guide pipe 47 is rotatably connected to a stirring blade 45, the top end of the stirring blade 45 is fixedly connected to three or more air outlet pipes 48, and the bottom of the stirring tank 46 is fixedly connected to a porous ceramic block 42.

[0032] The inner side of the stirring blade 45 has a flow guide cavity. The gas guided by the air pump 43 is transported into the flow guide cavity through the air guide pipe 47, and then discharged through the air outlet pipe 48 to form micro bubbles, thereby producing a pneumatic stirring effect.

[0033] like Figure 3 As shown, the stirring blade 45 is rotatably connected to the inner cavity of the porous ceramic block 42. A second rotating motor 41 is fixedly connected to the bottom of the inner cavity of the porous ceramic block 42, and the output end of the second rotating motor 41 is fixedly connected to the bottom of the stirring blade 45.

[0034] After the mixed liquid enters the mixing tank 46, the second rotating motor 41 drives the stirring blades 45 to rotate, thereby mechanically stirring the liquid-water mixture in the mixing tank. At the same time, the air pump 43 delivers air to the stirring blades 45 through the air guide pipe 47. The air is released through the air outlet pipe 48 to form microbubbles, generating a pneumatic stirring effect, which makes the liquid in the mixing tank 46 fully mixed. The porous ceramic blocks 42 filled at the bottom of the mixing tank 46 provide an attachment carrier for microbial growth. During the stirring process, the microorganisms attached to the surface of the packing material come into full contact with the organic matter in the wastewater, and carry out adsorption and biodegradation, realizing an efficient hydrolysis and acidification process, and effectively improving the biodegradability of the wastewater.

[0035] like Figure 4 As shown, the feeding assembly 6 includes a first water storage tank 61, which is fixedly connected to one side of the dilution tank 1. A first submersible pump 62 is provided at the bottom of the first water storage tank 61. The output end of the first submersible pump 62 is fixedly connected to a first water inlet pipe 63. One end of the first water inlet pipe 63 passes through the dilution tank 1 and extends into the inner cavity of the drum grid 8.

[0036] like Figure 5 As shown, the water inlet assembly 7 includes a second water storage tank 71, which is fixedly connected to one side of the dilution tank 1. A second submersible pump 72 is fixedly connected to the bottom of the second water storage tank 71. A second water inlet pipe 73 is fixedly connected to the output end of the second submersible pump 72. One end of the second water inlet pipe 73 passes through the dilution tank 1 and extends into the inner cavity of the dilution tank 1.

[0037] The leachate in the first water storage tank 61 is lifted by the first submersible pump 62 and transported to the inner cavity of the drum screen 8 through the first water inlet pipe 63. The drum screen 8 rotates continuously under the drive of the first rotating motor 9 to mechanically screen the leachate, effectively intercepting and removing large suspended solids, and completing the preliminary physical pretreatment. At the same time, the liquid in the second water storage tank 71 of the water inlet assembly 7 is lifted by the second submersible pump 72 and transported to the dilution tank 1 through the second water inlet pipe 73, where it is initially mixed with the leachate to dilute the concentration.

[0038] Working principle: During use, the leachate enters the dilution tank 1 through the feeding assembly 6. The leachate in the first water storage tank 61 is transported to the inner cavity of the drum screen 8 by the first submersible pump 62. The drum screen 8 rotates under the drive of the first rotating motor 9, screening and filtering the leachate, intercepting and removing large suspended solids, thus completing the pretreatment. The pretreated leachate is initially mixed in the dilution tank 1. Then, the water in the second water storage tank 71 is transported to the dilution tank 1 by the second submersible pump 72, where it is initially mixed with the pretreated leachate. The mixed liquid accumulates in the tank and overflows into the stirring assembly 4 through the first corrugated weir 2.

[0039] The liquid entering the stirring assembly 4 undergoes mixing and biochemical treatment in the stirring tank 46. The second rotating motor 41 drives the stirring blades 45 to rotate, realizing mechanical stirring. At the same time, the air pump 43 delivers air to the stirring blades 45 through the air guide pipe 47. The air is released through the air outlet pipe 48 to form microbubbles, which enhances the gas-liquid mass transfer efficiency and achieves thorough mixing throughout the tank. The porous ceramic blocks 42 filled at the bottom of the stirring tank 46 provide a large amount of attachment surface for microbial growth. During the stirring process, the microorganisms attached to the packing material come into full contact with the wastewater, adsorbing and biodegrading organic matter, realizing an efficient hydrolysis acidification process and improving the biodegradability of the wastewater.

[0040] After thorough mixing and biochemical treatment, the mixture overflows evenly into the drainage tank 5 through the second wave weir 3. Finally, the clarified treated effluent is discharged through the drainage pipe 10 and pumped by the water pump 11 to enter the next process.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A landfill leachate treatment device, comprising a dilution tank (1), characterized in that, One end of the dilution tank (1) is fixedly connected to a stirring assembly (4), and a first wave weir (2) is fixedly connected to the side of the dilution tank (1) near the stirring assembly (4). A drainage tank (5) is fixedly connected to one side of the stirring assembly (4), and a second wave weir (3) is fixedly connected to the two inner walls of the drainage tank (5) near the stirring assembly (4). A drainage pipe (10) is fixedly connected to one end of the drainage tank (5), and a water pump (11) is provided at one end of the drainage pipe (10).

2. The landfill leachate treatment device according to claim 1, characterized in that, A feeding assembly (6) is fixedly connected to one side of the outer wall of the dilution tank (1), and a first rotating motor (9) is fixedly connected to the other side of the dilution tank (1). A roller grid (8) is fixedly connected to the output end of the first rotating motor (9), and a water inlet assembly (7) is fixedly connected to the outer wall of the dilution tank (1) near the first rotating motor (9).

3. The landfill leachate treatment device according to claim 1, characterized in that, The stirring assembly (4) includes a stirring tank (46), a support (44) is fixedly connected to the top of the stirring tank (46), an air pump (43) is fixedly connected to the support (44), and an air guide pipe (47) is fixedly connected to the output end of the air pump (43). The stirring tank (46) is fixedly connected between the dilution tank (1) and the drainage tank (5).

4. A landfill leachate treatment device according to claim 3, characterized in that, The bottom end of the air guide pipe (47) is rotatably connected to a stirring blade (45), the top end of the stirring blade (45) is fixedly connected to three or more air outlet pipes (48), and the bottom of the stirring tank (46) is fixedly connected to a porous ceramic block (42).

5. A landfill leachate treatment device according to claim 4, characterized in that, The stirring blade (45) is rotatably connected to the inner cavity of the porous ceramic block (42). A second rotating motor (41) is fixedly connected to the bottom of the inner cavity of the porous ceramic block (42), and the output end of the second rotating motor (41) is fixedly connected to the bottom of the stirring blade (45).

6. A landfill leachate treatment device according to claim 2, characterized in that, The feeding assembly (6) includes a first water storage tank (61), which is fixedly connected to one side of the dilution tank (1). A first submersible pump (62) is provided at the bottom of the first water storage tank (61). A first water inlet pipe (63) is fixedly connected to the output end of the first submersible pump (62). One end of the first water inlet pipe (63) passes through the dilution tank (1) and extends to the inner cavity of the drum grid (8).

7. A landfill leachate treatment device according to claim 2, characterized in that, The water inlet assembly (7) includes a second water storage tank (71), which is fixedly connected to one side of the dilution tank (1). A second submersible pump (72) is fixedly connected to the bottom of the second water storage tank (71). A second water inlet pipe (73) is fixedly connected to the output end of the second submersible pump (72). One end of the second water inlet pipe (73) passes through the dilution tank (1) and extends into the inner cavity of the dilution tank (1).

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