Leachate treatment device

Abstract

The utility model provides a leachate treatment device, which relates to the technical field of water treatment devices, and comprises a submersible pump arranged in an o tank, a pump outlet of the submersible pump is connected with a jet aerator through a flange, the jet aerator is communicated with an air inlet pipe, and one end of the air inlet pipe deviating from the jet aerator extends out of a tank opening of the o tank. The middle of the air inlet pipe is communicated with a foam collecting assembly, the foam collecting assembly floats on a foam layer on the surface of the o tank, and the air inlet pipe is further communicated with a defoaming agent adding assembly. The technical problems that an existing treatment device lacks water surface floating foam collecting equipment, foam floats on the water surface after being stacked and is not prone to being recycled by the treatment device, the equipment is independent of one another, and cost is increased are solved. The technical effects that the floating foam on the water surface can be collected, the equipment is integrated, the equipment cost is reduced, and the number of invested sets can be flexibly selected to cope with different loads in winter and summer are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment device technical field especially is concerned with a kind of leachate treatment device. BACKGROUND

[0002] Garbage leachate is waste liquid generated by gravity, fermentation and other physical and chemical effects when domestic waste is piled up. Because of its complex source, the water quality is extremely complex, with high organic matter content, high heavy metals, high salt content and high surfactant content. This makes the leachate treatment process present the problems of high sludge load, high sludge concentration and excessive foam, which is extremely difficult to treat, and is generally set in A / O biochemical tank for wastewater treatment.

[0003] In the prior art, the garbage leachate treated in the AO tank includes a blower, a defoaming device, a plug flow device and an aerator arranged independently. There is no water surface foam collection device, and when the surface foam accumulates, it is difficult to return to the treatment device. When the sludge is updated, the foam containing filamentous bacteria and aged sludge cannot be effectively discharged, resulting in continuous increase of foam, which seriously affects the treatment effect and stable operation of the system.

[0004] In addition, in the prior art, the blower, the defoaming device, the plug flow device and the aerator are purchased and operated independently, and the water surface foam collection device is additionally added, which increases the number of required independent treatment devices, increases the equipment purchase cost, occupies more space resources, and increases the equipment maintenance and management cost. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a leachate treatment device to alleviate the technical problems of lack of water surface foam collection device, foam accumulation on the water surface, and independent equipment, which increases the cost in the prior art.

[0006] The utility model provides a leachate treatment device, which comprises a submersible pump, a jet aerator, an air inlet pipe, a foam collection assembly and a defoaming agent dosing assembly.

[0007] The submersible pump is arranged inside the o tank, the pump outlet of the submersible pump is connected with the jet aerator through a flange, the jet aerator is communicated with the air inlet pipe, one end of the air inlet pipe away from the jet aerator extends out of the tank opening of the o tank, the middle part of the air inlet pipe is communicated with the foam collection assembly, the foam collection assembly floats on the foam layer on the surface of the o tank, and the air inlet pipe is also communicated with the defoaming agent dosing assembly.

[0008] Further, the jet aerator comprises a nozzle, an air suction chamber, a throat pipe and a diffusion pipe.

[0009] The end of the nozzle is connected with the submersible pump through a flange, and the other end of the nozzle is sequentially communicated with an air suction chamber, a throat pipe and a diffusion pipe.

[0010] Further, the diffusion pipe is trumpet-shaped.

[0011] Further, the foam collecting assembly comprises a hose, a clamp, a bolt and a float;

[0012] The hose is communicated with the middle part of the air inlet pipe, the end of the hose away from the air inlet pipe is sleeved with the clamp, the clamp is connected with the float through the bolt, and the float floats on the foam layer on the surface of the pool.

[0013] Further, the bottom of the float is provided with a ring connected with the bolt.

[0014] Further, the defoaming agent adding assembly comprises an adding pipe, a defoaming agent barrel, a metering pump and a hand valve.

[0015] The adding pipe is communicated with the air inlet pipe, the end of the adding pipe away from the air inlet pipe is communicated with the defoaming agent barrel, and the metering pump and the hand valve are further arranged on the adding pipe.

[0016] Further, the connection position of the adding pipe and the air inlet pipe is higher than the connection position of the hose and the air inlet pipe.

[0017] Further, the air inlet pipe is vertically arranged at the center of the pool, and the fixed frame is arranged at the pool opening of the pool.

[0018] Further, the fixed frame comprises C-shaped steel, fixing bolts, square pipes and angle irons; the rectangular edges of the pool opening of the pool are respectively welded with C-shaped steel, the C-shaped steel is connected with four square pipes through the fixing bolts, and the end of each square pipe away from the C-shaped steel is welded with an angle iron; the rectangular clamping air inlet pipe is surrounded by the four angle irons.

[0019] Further, the air inlet pipe further comprises a ball valve arranged at the pool opening of the pool.

[0020] Beneficial effects:

[0021] The permeate treatment device comprises a submersible pump, a jet aerator, an air inlet pipe, a foam collecting assembly and a defoaming agent adding assembly; the submersible pump is arranged in the pool, the pump outlet of the submersible pump is connected with the jet aerator through a flange, the jet aerator is communicated with the air inlet pipe, the end of the air inlet pipe away from the jet aerator is arranged to extend out of the pool opening of the pool, the middle part of the air inlet pipe is communicated with the foam collecting assembly, the foam collecting assembly floats on the foam layer on the surface of the pool, and the air inlet pipe is further communicated with the defoaming agent adding assembly.

[0022] The utility model discloses a water surface floating foam collecting equipment is integrated to the processing device, replaces traditional multiple independent equipment, and the foam is adsorbed in the pool, and after solving the problem that the foam is accumulated, floats on the water surface and is not easy to be recycled by the processing device, simultaneously, the equipment cost is reduced, and can choose the input suit number flexibly and responds to the different load of winter and summer etc.

[0023] The utility model discloses a water surface floating foam collecting equipment is integrated to the processing device, replaces traditional multiple independent equipment, and the foam is adsorbed in the pool, and after solving the problem that the foam is accumulated, floats on the water surface and is not easy to be recycled by the processing device, simultaneously, the equipment cost is reduced, and can choose the input suit number flexibly and responds to the different load of winter and summer etc.

[0024] In addition, compared with the prior art, when the aeration device needs to be overhauled and replaced, the whole pool can be directly taken out from the top for inspection, maintenance, repair and replacement, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The structure schematic diagram of the leachate treatment device provided by the utility model embodiment is shown in the figure.

[0027] Figure 2 The working schematic diagram of dosing, aeration and defoaming of the leachate treatment device provided by the utility model embodiment is shown in the figure.

[0028] Figure 3 The structure schematic diagram of the jet aeration device in the leachate treatment device provided by the utility model embodiment is shown in the figure.

[0029] Figure 4 The structure schematic diagram of the foam collecting assembly in the leachate treatment device provided by the utility model embodiment is shown in the figure.

[0030] Figure 5 The structure schematic diagram of the defoaming agent dosing assembly in the leachate treatment device provided by the utility model embodiment is shown in the figure.

[0031] Figure 6The structure schematic view of the fixed frame in the leachate treatment device is provided.

[0032] Icon: 1 - submersible pump; 2 - jet aerator; 3 - air inlet pipe; 4 - foam collection assembly; 5 - defoaming agent dosing assembly; 6 - fixed frame; 7 - ball valve;

[0033] 201 - nozzle; 202 - suction chamber; 203 - throat pipe; 204 - diffuser pipe;

[0034] 401 - hose; 402 - hoop; 403 - bolt; 404 - float; 405 - circular ring;

[0035] 501 - dosing pipe; 502 - defoaming agent barrel; 503 - metering pump; 504 - manual valve;

[0036] 601 - C-shaped steel; 602 - fixing bolt; 603 - square tube; 604 - angle iron. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0040] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, or it is the orientation or position relation of the utility model product when using usually, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, construct and operate, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second", "third" and so on are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical", "overhang" and so on do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0042] In the description of the utility model, it also needs to explain that, unless otherwise expressly provided and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0044] As shown in Figure 1 , Figure 2 The utility model embodiment provides a kind of leachate treatment device, comprising: submersible pump 1, jet aerator 2, air inlet pipe 3, foam collection component 4 and defoaming agent dosing component 5;

[0045] Submersible pump 1 is arranged in the inside of o pool, and the pump outlet of submersible pump 1 is connected with jet aerator 2 by flange, jet aerator 2 is communicated with air inlet pipe 3, the end of air inlet pipe 3 deviating from jet aerator 2 extends the pool mouth of o pool, and the middle part of air inlet pipe 3 is communicated with foam collection component 4, and foam collection component 4 floats in the foam layer of o pool surface, and air inlet pipe 3 is also communicated with defoaming agent dosing component 5.

[0046] Specifically, the submersible pump 1 is used to submerge the entire unit into the o pool for work. The motor drives the impeller to rotate, and the water is sucked into the submersible pump 1 by the centrifugal force, so that the water is output through the water outlet of the pump outlet. At this time, the pump outlet of the submersible pump 1 is connected with the jet aerator 2 through the flange, and the water with a certain pressure and flow rate is transported to the jet aerator 2. The water flow condition is provided for the operation of the jet aerator 2, so that the jet aerator 2 can generate negative pressure by using the water flow, and then realize the functions of air suction and foam suction. The water with a certain pressure and flow rate from the submersible pump 1 enters the jet aerator 2, first flows through the nozzle, then is sprayed into the throat pipe through the suction chamber, and finally is diffused from the diffuser pipe. The air inlet pipe 3 vertically arranged with the jet aerator 2 forms negative pressure when the water flow passes through the suction chamber of the jet aerator 2. The negative pressure can suck the air, foam and defoaming agent collected in the air inlet pipe 3. The sucked substances are then sprayed into the water from the jet aerator 2 along with the water flow, so as to achieve the effects of oxygen supply, foam elimination, mixing of liquid in the pool, flow pushing and re-suction of accumulated foam into the system. Different substances can be mixed and transported into the water to promote the leachate treatment process.

[0047] The end of the air inlet pipe 3 away from the jet aerator 2 extends out of the pool opening of the o pool, serving as a conveying channel to transport the defoaming agent, foam and air to the suction chamber of the jet aerator 2. The opening degree of the ball valve arranged at the upper part controls the negative pressure in the pipe, and then adjusts the proportion of the air and foam sucked in the pipe, so as to ensure that the proportions of various substances entering the jet aerator 2 are appropriate, so as to achieve the best treatment effect.

[0048] The foam collecting assembly 4 provides buoyancy to make the entire assembly float on the foam layer on the surface of the o pool. With the negative pressure in the air inlet pipe 3 of the aerator, the foam floating on the water surface is sucked, collected and transported to the air inlet pipe 3 of the aerator, and finally enters the jet aerator 2 along with the water flow, so as to realize the function of re-collecting the surface accumulated foam into the system, solve the problem that the foam on the surface of the conventional leachate treatment station o pool is difficult to return to the system, and cause the problem of increasing foam, which is beneficial to the removal and updating of sludge. After the defoaming agent adding assembly 5 is started, the flow rate can be adjusted within a certain range, the agent is injected into the pipe, and then enters the jet aerator 2 through the air inlet pipe 3, and is sprayed into the water together with the air and foam, so as to achieve the effect of eliminating foam and solve the problem of excessive foam in the leachate treatment process.

[0049] It should be noted that there is no water surface foam collecting device on the conventional leachate treatment o pool, and the surface foam accumulates relatively independently and is difficult to return to the system. Therefore, the sludge is not updated when the sludge is removed, updated and replaced, so that the foam caused by filamentous bacteria and aged sludge is more and more. The foam collecting assembly 4 uses the suction force of the jet to suck the surface foam into the air inlet pipe 3, and then the foam is mixed with the sludge again after the jet water, which is beneficial to the removal and updating of the sludge.

[0050] It should be noted that the aeration system in the AO tank of a conventional leachate treatment plant is generally configured according to the maximum oxygen demand at full load; during low load periods in winter, the blowers and jet pumps are still used at maximum load. Multiple units of this invention can be installed to cope with loads ranging from 10% to 100%, and the number of units in operation can be adjusted according to the load to reduce equipment costs.

[0051] In an embodiment of this utility model, the jet aerator 2 includes a nozzle 201, an air intake chamber 202, a throat 203, and a diffuser 204;

[0052] The end of the nozzle 201 is connected to the submersible pump 1 via a flange. The other end of the nozzle 201 is connected in sequence to the intake chamber 202, the throat 203 and the diffuser 204. The intake chamber 202 is connected to the air inlet pipe 3.

[0053] The diffuser tube 204 is trumpet-shaped.

[0054] Specifically, such as Figure 3 As shown, nozzle 201 is made of high-strength, corrosion-resistant alloy material to adapt to the corrosive environment of high concentrations of organic matter, heavy metals, salts, and surfactants in leachate, thus extending its service life. Simultaneously, the outlet shape of nozzle 201 adopts a tapering design, thereby improving the jet speed and stability of the water flow and enhancing the negative pressure generation effect. The suction chamber 202 is connected to the air inlet pipe 3; in the initial stage of water flow entering the throat pipe 203, the pipe diameter is appropriately reduced from the suction chamber 202 to the throat pipe 203 to increase the water flow velocity and enhance the negative pressure; in the latter half of the throat pipe 203, the pipe diameter gradually increases from the throat pipe 203 to the diffuser pipe 204, ensuring a smooth transition in water flow velocity, reducing energy loss, and improving energy utilization efficiency.

[0055] The length and expansion angle of the diffuser 204 can be adjusted according to the actual treatment effect, effectively converting kinetic energy into pressure energy, so that the mixed liquid is more evenly distributed in the intermediate leachate, improving the aeration, defoaming and propulsion effects. The outlet of the diffuser 204 is funnel-shaped to enhance the spray range and effect.

[0056] It should be noted that the aeration system of the AO tank in conventional leachate treatment generally consists of a combination of a blower, a jet pump, and an aerator; however, this utility model can replace the three independent devices by combining a submersible pump 1 and a jet aerator 2.

[0057] In an embodiment of this utility model, the foam collection assembly 4 includes a hose 401, a clamp 402, a bolt 403, and a float 404;

[0058] The hose 401 is connected to the middle of the air inlet pipe 3. The end of the hose 401 away from the air inlet pipe 3 is fitted with a clamp 402. The clamp 402 is connected to the float 404 by bolts 403. The float 404 floats on the foam layer on the surface of the pool.

[0059] The bottom of the float 404 is provided with a ring 405 that is connected to the bolt 403.

[0060] The defoamer dosing assembly 5 includes a dosing pipe 501, a defoamer tank 502, a metering pump 503, and a manual valve 504;

[0061] The dosing pipe 501 is connected to the air inlet pipe 3. The end of the dosing pipe 501 away from the air inlet pipe 3 is connected to the defoamer tank 502. The dosing pipe 501 is also equipped with a metering pump 503 and a manual valve 504.

[0062] The connection point between the dosing tube 501 and the air inlet tube 3 is higher than the connection point between the hose 401 and the air inlet tube 3.

[0063] Specifically, such as Figure 1 , Figure 4 As shown, the flexible hose 401 serves as a channel connecting the air inlet pipe 3 and the foam collection point on the water surface. One end is connected to the middle of the air inlet pipe 3, transporting the collected foam to the air inlet pipe 3 and then into the jet aerator 2. A clamp 402 is fitted onto the end of the flexible hose 401 facing away from the air inlet pipe and is connected to a float 404 via a bolt 403. The ring 405 at the bottom of the float 404 provides a connection point for the bolt 403, connecting the float 404 to the flexible hose 401. At least four floats 404 float on the foam layer on the surface of the O-pool using their own buoyancy, always maintaining the optimal position for collecting accumulated foam (the surface inside the O-pool in the diagram). Utilizing the negative pressure within the air inlet pipe 3, and simultaneously, the floats 404 cause the flexible hose 401 to float on the water surface, absorbing and collecting the foam on the surface of the O-pool. This ensures that foam can be continuously and effectively collected under different working conditions, such as water flow fluctuations and changes in foam thickness, avoiding surface foam accumulation. The collected foam is then carried by the airflow into the jet aerator 2 and neutralized with the defoamer.

[0064] like Figure 5 As shown, the dosing pipe 501 serves as a channel for delivering defoamer, with one end connected to the air inlet pipe 3 and the other end connected to the defoamer tank 502. A metering pump 503 is installed on the dosing pipe 501 to precisely control the amount of defoamer added, allowing for flexible adjustment of the dosage within a certain range based on the actual foam levels in the leachate. A manual valve 504 is also located on the dosing pipe 501, facilitating manual opening or closing of the dosing channel by operators, aiding in equipment maintenance, debugging, and handling emergencies. The connection point between the dosing pipe 501 and the air inlet pipe 3 is higher than the connection point between the hose 401 and the air inlet pipe 3, i.e., in a vertical direction, allowing the defoamer transported from above to the air inlet pipe 3 to smoothly descend and eliminate any accumulated foam due to gravity.

[0065] The metering pump 503 precisely controls the amount of defoamer added, ensuring that the appropriate amount of defoamer is added accurately under different foam generation levels, thus avoiding waste and guaranteeing defoaming effect. The manual valve 504 allows operators to control the dosing process in a timely manner, improving the convenience and safety of equipment operation.

[0066] In an embodiment of this utility model, the leachate treatment device further includes a fixing frame 6, an air inlet pipe 3 is vertically installed at the center of the o-tank, the fixing frame 6 is installed at the o-tank opening, and the air inlet pipe 3 is fixed by the fixing frame 6.

[0067] The fixing frame 6 includes C-shaped steel 601, fixing bolts 602, square tubes 603 and angle irons 604; C-shaped steel 601 is welded to the rectangular edge of the pool opening, and the C-shaped steel 601 is connected to the four square tubes 603 by fixing bolts 602. An angle iron 604 is welded to the end of each square tube 603 away from the C-shaped steel 601; the rectangular clamping structure formed by the four angle irons 604 holds the air inlet pipe 3.

[0068] A ball valve 7 is also installed at the outlet of the air inlet pipe 3 extending out of the pool.

[0069] Specifically, such as Figure 6 As shown, C-shaped steel 601 is welded to the edges of the rectangle formed by the opening of the o-pool, providing connection support points for the air intake pipe 3. The C-shaped steel 601 is concentrically threaded to the four square tubes 603 by fixing bolts 602. Angle iron 604 is welded to the center of each square tube 603 from the four directions on the end opposite to the C-shaped steel 601. The four angle irons 604 can be welded together to form a clamping structure, fixing the air intake pipe 3 and making it stably and vertically inserted into the o-pool.

[0070] The fixing bracket 6 ensures the stable position of the air inlet pipe 3 in the o-tank, preventing it from shifting or shaking due to water flow impact, equipment vibration, or other factors. A stable air inlet pipe 3 helps ensure the connection stability between the foam collection component 4, the defoamer dosing component, and the jet aerator 2, thereby guaranteeing the normal operation of the entire leachate treatment device. Simultaneously, its structural design facilitates installation and maintenance; when disassembly is required, it can be removed directly from the top of the o-tank by unscrewing the fixing bolts 602, avoiding the need for traditional methods of draining the bottom of the o-tank.

[0071] The ball valve 7 is arranged at the pool mouth portion of the air inlet pipe 3 extending out of the O pool, and mainly comprises a ball, a valve rod and a sealing part. The ball has a circular through hole. When the valve rod rotates to drive the ball to rotate, the through hole of the ball is aligned with or deviated from the passage of the air inlet pipe 3, so that the control of the air flow in the air inlet pipe 3 is realized. By adjusting the opening degree of the ball valve 7, the negative pressure in the air inlet pipe 3 can be controlled, and then the proportion of the air and the foam sucked in the pipe can be adjusted. In the leachate treatment process, according to the actual treatment requirement, the whole treatment device can be ensured to be high-efficiency operated in different seasons and different working conditions, and the treatment efficiency and treatment quality are improved.

[0072] Based on the above embodiment, the working process of the leachate treatment device of the utility model is shown in Figure 2 During the leachate treatment process, the submersible pump 1 sucks water from the O pool and delivers to the jet aerator 2. The water is high-speed sprayed through the nozzle 201. The jet aerator 2 makes the air suction chamber 202 generate negative pressure, and the air, the foam and the defoaming agent are sucked through the air inlet pipe 3. The float 404 of the foam collecting assembly 4 floats on the foam layer on the surface of the O pool by the buoyancy. Under the action of the negative pressure of the air inlet pipe 3, the foam is sucked into the air inlet pipe 3 through the hose 401. The metering pump 503 of the defoaming agent adding assembly 5 controls the defoaming agent to be injected into the air inlet pipe 3 from the defoaming agent barrel 502 through the adding pipe 501. After the three are mixed, the water flow is sprayed from the jet aerator 2, so as to realize the functions of oxygen supply, defoaming, mixing of the liquid in the pool, flow pushing and re-suction of the accumulated foam into the system. The fixing frame 6 ensures the stability of the air inlet pipe 3.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or part or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A leachate treatment apparatus, characterized by, The device comprises a submersible pump (1), a jet aerator (2), an air inlet pipe (3), a foam collecting assembly (4) and an antifoaming agent adding assembly (5). The submersible pump (1) is arranged inside the o pond, the pump outlet of the submersible pump (1) is connected with the jet aerator (2) through a flange, the jet aerator (2) is communicated with the air inlet pipe (3), one end of the air inlet pipe (3) away from the jet aerator (2) extends out of the pond mouth of the o pond, the middle part of the air inlet pipe (3) is communicated with the foam collecting assembly (4), the foam collecting assembly (4) floats on the foam layer of the o pond surface, and the air inlet pipe (3) is also communicated with the antifoaming agent adding assembly (5).

2. The leachate treatment device according to claim 1, wherein the jet aerator (2) comprises a nozzle (201), an air suction chamber (202), a throat pipe (203) and a diffusion pipe (204); the end of the nozzle (201) is connected with the submersible pump (1) through a flange, the other end of the nozzle (201) is sequentially communicated with the air suction chamber (202), the throat pipe (203) and the diffusion pipe (204), and the air suction chamber (202) is communicated with the air inlet pipe (3).

3. The leachate treatment device according to claim 2, wherein the diffusion pipe (204) is in the shape of a horn.

4. The leachate treatment device according to claim 1, wherein the foam collecting assembly (4) comprises a hose (401), a clamp (402), a bolt (403) and a float (404); the hose (401) is communicated with the middle part of the air inlet pipe (3), one end of the hose (401) away from the air inlet pipe (3) is sleeved with the clamp (402), the clamp (402) is connected with the float (404) through the bolt (403), and the float (404) floats on the foam layer of the o pond surface.

5. The leachate treatment device according to claim 4, wherein the bottom of the float (404) is provided with a circular ring (405) connected with the bolt (403).

6. The leachate treatment device according to claim 5, wherein the antifoaming agent adding assembly (5) comprises an adding pipe (501), an antifoaming agent barrel (502), a metering pump (503) and a hand valve (504); the adding pipe (501) is communicated with the air inlet pipe (3), one end of the adding pipe (501) away from the air inlet pipe (3) is communicated with the antifoaming agent barrel (502), and the metering pump (503) and the hand valve (504) are further arranged on the adding pipe (501).

7. The leachate treatment device according to claim 6, wherein the connection position of the adding pipe (501) and the air inlet pipe (3) is higher than the connection position of the hose (401) and the air inlet pipe (3).

8. The leachate treatment device according to claim 1, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Further comprising a fixing frame (6), the air inlet pipe (3) is vertically arranged at the center of the pool, the fixing frame (6) is arranged at the pool opening, and the air inlet pipe (3) is fixed through the fixing frame (6).

9. The leachate treatment device according to claim 8, characterized in that, The fixing frame (6) comprises a C-shaped steel (601), a fixing bolt (602), a square tube (603) and an angle iron (604); The rectangular edges of the pool opening of the pool are respectively welded with C-shaped steels (601), the C-shaped steels (601) are connected with four square tubes (603) through the fixing bolts (602), and the ends of each square tube (603) away from the C-shaped steel (601) are welded with an angle iron (604); the four angle irons (604) surround the air inlet pipe (3) in a rectangular shape.

10. The leachate treatment device according to claim 1, characterized in that, The air inlet pipe (3) extending out of the pool opening is further provided with a ball valve (7).

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