Heavy metal leachate circulating purification device

Abstract

The present invention discloses a heavy metal leachate circulation purification apparatus, and relates to the technical field of leachate purification, the heavy metal leachate circulation purification apparatus comprises: a tank body, the tank body is used for temporarily storing heavy metal leachate, and the tank body is provided with a taking port; the cover sealing mechanism is used for moving the cover sealing taking opening; the heating mechanism is used for heating the liquid in the tank body; a cover plate is arranged on the lifting mechanism, and the lifting mechanism is used for moving the cover plate to seal the opening in the top of the tank body; the aeration mechanism is used for supplying air and liquid into the tank body. The stirrer can be repeatedly lifted, the stirring effect is improved, the stirrer can be repeatedly lifted for aeration, the interior of the tank body can be conveniently washed, percolate can be conveniently heated, meanwhile, sediments in the tank body can be conveniently treated, the sealing plate has multiple opening modes, and the requirement for multiple working environments can be met.

Description

Technical Field

[0001] The invention relates to the technical field of leachate purification, in particular to a heavy metal leachate circulation purification device. Background Art

[0002] Mining leachate refers to a kind of aqueous solution formed by the seepage of water and chemical solutions in the ore during underground or open-pit mining. The composition of mining leachate is very complex, containing a large amount of heavy metals and toxic and harmful substances, such as copper, lead, zinc, cadmium, etc., which cause great pollution to the environment and ecology.

[0003] According to the composition characteristics of mining leachate, there are currently two main treatment methods: chemical method and biological method.

[0004] 1. Chemical method: Chemical method mainly achieves the purpose of filtration separation or adsorption separation by adding chemical agents to react with pollutants in the leachate to form precipitates. It is mainly used for the treatment of heavy metals, organic matter and floating particles. Depending on the use of different chemical agents, it mainly includes neutralization reaction, oxidation reaction, precipitation reaction, etc. For example, lime neutralization method, infrared oxidation method, sulfide precipitation method, etc.

[0005] 2. Biological method: Biological method usually uses microorganisms to adsorb, degrade, transform and other chemical reactions on pollutants. The characteristics of this method are: safe, low-cost, and green and environmentally friendly. The more common microbial treatment methods include anaerobic reaction, aerobic reaction and acidophilic reaction. At present, biological method has been successfully used to treat wastewater containing heavy metals such as copper, lead and zinc, and the treatment effect is relatively good.

[0006] In the existing leachate treatment technology, there are some problems that need to be solved urgently. For example, it is impossible to repeatedly lift and lower for stirring and aeration during the purification process, which not only affects the treatment efficiency, but also may lead to unstable treatment effects. At the same time, it is inconvenient to flush the tank body and treat the sediment in the tank body, which further increases the difficulty and cost of treatment. In addition, the single opening method of the access door also limits the flexibility and convenience of operation. For this reason, we proposed a heavy metal leachate circulation purification device, which aims to solve the above problems through technological innovation and improve the efficiency and quality of leachate treatment. Summary of the invention

[0007] The object of the present invention is to provide a heavy metal leachate circulation purification device to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] Heavy metal leachate circulation purification device, including:

[0010] A tank body, the tank body is used to temporarily store heavy metal leachate, and the tank body is provided with a taking port;

[0011] A capping mechanism, the capping mechanism being used to move the capping access opening;

[0012] A heating mechanism, wherein the heating mechanism is used to heat the liquid in the tank;

[0013] A lifting mechanism, wherein a cover plate is provided on the lifting mechanism and is used to move the cover plate to seal the top opening of the tank body;

[0014] An aeration mechanism, the aeration mechanism is used to supply air and liquid into the tank;

[0015] A taking port is arranged on the side wall at the bottom of the tank body, a sealing mechanism is arranged on the tank body on one side of the taking port, a heating mechanism is arranged at the bottom of the tank body on one side of the taking port, an aeration mechanism is arranged above the heating mechanism, the aeration mechanism is fixedly connected to a cover plate, and a stirrer and a feeding pipe are arranged on the cover plate.

[0016] Furthermore, the aeration mechanism includes a through pipe fixedly passing through the cover plate, the top of the through pipe is connected to a valve body, the free end of the valve body is connected to a hose, the bottom of the through pipe is connected to a fixed seat, a nozzle is fixedly passed through the fixed seat, and the fixed seat is used to connect the through pipe and the nozzle.

[0017] Furthermore, the heating mechanism includes a carrier that is movably arranged on the inner bottom of the tank body, the carrier is provided with a telescopic rod, the protruding end of the telescopic rod is connected to a bracket and is used to push the bracket to rise and fall, the bracket is provided with a heating plate for heating the liquid, and the top of the bracket is moved to fit the top plate to horizontally partition the inside of the tank body.

[0018] Furthermore, the sealing mechanism includes a sliding seat that is slidably connected to the outer wall of the tank body, and a sealing plate for sealing the taking port is connected to the sliding seat through a hinge. A handle for assisting in opening the sealing plate is provided on the end of the sealing plate away from the sliding seat, and a pin for limiting the opening of the sealing plate is movably inserted into the handle.

[0019] Furthermore, the lifting mechanism includes a second telescopic rod arranged on the outer wall of the tank body, the extended end of the second telescopic rod is connected to a fixed block and is used to push the fixed block to rise and fall, and the bracket is connected to a fixing seat for installing the cover plate.

[0020] Furthermore, the through pipe is a hard pipe, and at least two groups of the through pipe are provided. The valve body is used to control the connection state between the hose and the through pipe.

[0021] Furthermore, the free end of the hose is connected to an air source, a liquid source and a water pump, the fixing seat is a disc-shaped structure, and a cavity for connecting the through pipe and the nozzle is provided inside the fixing seat.

[0022] Furthermore, the size of the carrier is smaller than the bottom size of the tank body, and the carrier enters the tank body through the taking port. The bracket and the top plate are both circular ring structures. A heating plate is provided in the inner circle of the bracket. The bracket is made of high-temperature resistant and heat-insulating material. The auxiliary working equipment of the heating plate is arranged on the carrier. The outer wall of the top plate is fixedly connected to the tank body, and a sealing ring is provided at the bottom of the top plate.

[0023] Furthermore, the sliding seat is provided with two groups symmetrically distributed on the tank body, the sliding seat is used to support the flipping and movement of the sealing plate, the sealing plate is an arc-shaped plate, the arc length of the sealing plate is less than or equal to half of the circumference of the bottom surface of the tank body, the pin is a T-shaped pin, and a limit ring for installing the pin is provided on the tank body above the handle, and the limit ring is used to limit the horizontal movement of the pin.

[0024] Furthermore, the fixing block is used to connect the telescopic rod 2 and the fixing seat, the outer ring diameter of the fixing seat is larger than the tank body diameter, and the height of the fixing seat is less than or equal to the height of the nozzle.

[0025] Compared with the prior art, the present invention has significant technical advantages, which not only optimizes the operation process, but also greatly improves the processing efficiency and flexibility, which are specifically reflected in the following aspects:

[0026] 1. Innovative driving and hybrid mechanisms

[0027] By driving the precise control of the telescopic rod 2, the present invention realizes the smooth upward movement of the fixed block and the fixed seat, thereby driving the cover plate to rise synchronously, and cleverly utilizing the small gap between the cover plate and the tank body to realize the precise injection of the leachate. This design avoids the problems of liquid splashing or uneven injection that may occur in traditional methods. Subsequently, the telescopic rod 2 is operated in reverse to ensure that the fixed seat and the cover plate fit tightly against the top opening of the tank body to form a sealed environment. At this time, the treated liquid is introduced through the feed port, and the agitator is started for mixing. It is particularly worth mentioning that the present invention allows the telescopic rod 2 to be repeatedly lifted and lowered during the mixing process, driving the agitator to move up and down, which not only enhances the mixing uniformity of the liquid, but also ensures the stable connection between the fixed seat and the tank body, avoiding the risk of separation due to frequent lifting and lowering, thereby significantly improving the stirring effect and efficiency.

[0028] 2. Efficient aeration and drainage system

[0029] Connect the free end of the hose to the gas source, and the gas passes through a carefully designed path - the hose, valve body, through pipe and the fixed seat cavity, and is finally evenly sprayed out by the nozzle, so as to effectively aerate the liquid in the tank. Combined with the flexible operation of the lifting mechanism, the cover plate is lifted and lowered together with the aeration mechanism, so as to achieve multi-level and multi-angle aeration of the liquid, greatly enhancing the oxygenation effect of the liquid. After the treatment is completed, the discharge of the liquid is also flexible and diverse: it can be discharged naturally through the drain pipe on the side wall of the tank, or it can be connected to a water pump and a hose, and the nozzle, the fixed seat cavity and other channels can be used to force the liquid out, providing users with a variety of choices. In addition, when the tank needs to be cleaned, just connect the hose to the water source, and the water flow can be sprayed through the nozzle to easily complete the internal cleaning, which greatly simplifies the maintenance process.

[0030] 3. Innovative heating and precipitation treatment

[0031] By driving the precise control of telescopic rod 1, the bracket carrying the heating plate slowly rises until it fits tightly with the top plate, forming a sealed and heat-insulated heating space. This design ensures that all the added leachate, treatment liquid and other materials are located above the heating plate, which is convenient for centralized heating treatment. The heating plate can not only evenly heat the liquid in the tank, but also when the sediment forms a solid state, by contracting telescopic rod 1, the bracket and heating plate together with the solid sediment can be moved down together, and then easily moved out of the tank by a mobile carrier. This not only simplifies the sediment treatment process, but also avoids the cleaning problems that may be encountered in traditional methods, achieving dual optimization of leachate heating treatment and sediment treatment.

[0032] 4. Flexible sealing design and multi-environment adaptability

[0033] The sealing plate design of the present invention is also ingenious. The user can easily open the sealing plate and enter the interior of the tank by simply removing the latch and pulling the handle. In addition, the sealing plate can also slide along the outer wall of the tank on the sliding seat, providing another opening method to meet the needs of different working environments. This diversified sealing plate opening method not only enhances the operating convenience of the equipment, but also improves its adaptability and flexibility in various complex working environments, ensuring the wide applicability of the present invention.

[0034] In summary, these technical advantages of the present invention not only significantly improve work efficiency, but also enhance the flexibility and convenience of operation, demonstrating its significant progress and unique value among similar technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the cover plate in the present invention;

[0037] Figure 3 It is a structural schematic diagram of the aeration mechanism in the present invention;

[0038] Figure 4 It is a structural schematic diagram of the heating mechanism in the present invention;

[0039] Figure 5 It is a structural schematic diagram of the capping mechanism in the present invention;

[0040] Figure 6 It is a structural schematic diagram of the lifting mechanism in the present invention.

[0041] In the figure: 1. tank body; 2. access opening; 3. capping mechanism; 4. heating mechanism; 5. cover plate; 6. lifting mechanism; 7. agitator; 8. aeration mechanism;

[0042] 31. Sliding seat; 32. Closing plate; 33. Latch; 34. Handle;

[0043] 41. carrier; 42. telescopic rod 1; 43. bracket; 44. heating plate; 45. top plate;

[0044] 61. Telescopic rod 2; 62. Fixed block; 63. Fixed seat;

[0045] 81. Through pipe; 82. Valve body; 83. Hose; 84. Fixing seat; 85. Nozzle. DETAILED DESCRIPTION

[0046] 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.

[0047] See also Figure 1-6 The present invention provides a technical solution: a heavy metal leachate circulation purification device, comprising:

[0048] A tank body 1 is used for temporarily storing heavy metal leachate, and a taking port 2 is provided on the tank body 1; a taking port 2 is provided on the side wall of the bottom of the tank body 1, a sealing mechanism 3 is provided on the tank body 1 on one side of the taking port 2, a heating mechanism 4 is provided on the bottom of the tank body 1 on one side of the taking port 2, a drain pipe is provided on the side wall of the tank body 1 between the heating mechanism 4 and the agitator 5, an aeration mechanism 8 is provided above the heating mechanism 4, the aeration mechanism 8 is fixedly connected to the cover plate 5, and the cover plate 5 is provided with an agitator 7 and a feeding pipe.

[0049] A lifting mechanism 6 is provided with a cover plate 5 and is used to move the cover plate 5 to seal the top opening of the tank body 1; the lifting mechanism 6 includes a telescopic rod 2 61 provided on the outer wall of the tank body 1, the extended end of the telescopic rod 2 61 is connected with a fixed block 62 and is used to push the fixed block 62 to rise and fall, a fixed seat 63 for installing the cover plate 5 is connected to the bracket 43, the telescopic rod 2 61 and the telescopic rod 1 42 have the same structure, the telescopic rod 2 61 can be a pneumatic, hydraulic or electric telescopic rod, the fixed block 62 is used to connect the telescopic rod 2 61 and the fixed seat 63, the outer circle diameter of the fixed seat 63 is greater than the diameter of the tank body 1, the height of the fixed seat 63 is less than or equal to the height of the nozzle 85, the fixed seat 63 is similar to a convex bushing, the cover plate 5 is provided on the inner circle of the fixed seat 63, and the protruding part at the bottom of the fixed seat 63 is inserted into the top opening of the tank body 1.

[0050] Drive the telescopic rod 62, the telescopic rod 61 pushes the fixed block 62 and the fixed seat 63 to move upward, the cover plate 5 moves up with the fixed seat 63, and the leachate is poured into the tank body 1 from the gap between the cover plate 5 and the tank body 1. Then operate the telescopic rod 62 again to move the fixed seat 63 and the cover plate 5 downward to seal the top opening of the tank body 1, and then add the treated liquid through the feed port, and then drive the agitator 5 to mix the liquid in the tank body 1. During mixing, the telescopic rod 62 can be repeatedly raised and lowered, so that the agitator 5 can be repeatedly raised and lowered to mix the liquid in the tank body 1. During the lifting and mixing, the fixed seat 63 cannot be separated from the tank body 1, so that the agitator 5 can be repeatedly raised and lowered, thereby improving the stirring effect.

[0051] The aeration mechanism 8 is used to supply air and liquid to the tank body 1. The aeration mechanism 8 includes a through pipe 81 fixedly passing through the cover plate 5. The top of the through pipe 81 is connected to a valve body 82. The free end of the valve body 82 is connected to a hose 83. The bottom of the through pipe 81 is connected to a fixed seat 84. A nozzle 85 is fixedly passed through the fixed seat 84. The fixed seat 84 is used to connect the through pipe 81 and the nozzle 85. The through pipe 81 is a rigid pipe. The through pipe 81 is provided with at least two groups. The valve body 82 is used to control the connection state between the hose 83 and the through pipe 81. The free end of the hose 83 is connected to an air source, a liquid source and a water pump. The hose 83 is a bendable elastic telescopic tube. The fixed seat 84 is a disc-shaped structure. A cavity for connecting the through pipe 81 and the nozzle 85 is provided inside the fixed seat 84.

[0052] The free end of the hose 83 is connected to the gas source, and the gas passes through the hose 83, the valve body 82, the through pipe 81 and the cavity of the fixing seat 84, and finally the gas is ejected through the nozzle 85 to aerate the liquid in the tank body 1. The cover plate 5 is repeatedly lifted and lowered in cooperation with the lifting mechanism 6, so that the aeration mechanism 8 is repeatedly lifted and lowered, so that the aeration mechanism 8 can be repeatedly lifted and lowered for aeration;

[0053] When the liquid is precipitated, the liquid can be discharged through the drain pipe on the side wall of the tank body 1, or by pumping water through a water pump, which is connected to a hose 83, and the liquid is discharged through a nozzle 85, a cavity of a fixing seat 84, a through pipe 81, a valve body 82 and a hose. The method of discharging the liquid in the tank body 1 can be selected;

[0054] When the sediment in the tank body 1 is processed, the free end of the hose 83 is connected to a water source, and water passes through the hose 83, the valve body 82, the through pipe 81 and the cavity of the fixing seat 84, and the water is finally sprayed out through the nozzle 85 to flush the tank body 1, so as to facilitate flushing the tank body 1.

[0055] The heating mechanism 4 is used to heat the liquid in the tank body 1; the heating mechanism 4 includes a carrier 41 that is movably arranged on the inner bottom of the tank body 1, a telescopic rod 42 is provided on the carrier 41, a protruding end of the telescopic rod 42 is connected to a bracket 43 and is used to push the bracket 43 to rise and fall, a heating plate 44 for heating the liquid is provided on the bracket 43, the top of the bracket 43 moves to fit the top plate 45 to horizontally partition the inside of the tank body 1, the size of the carrier 41 is smaller than the bottom size of the tank body 1, the carrier 41 enters the tank body 1 through the taking port 2, the bracket 43 and the top plate 45 are both annular structures, the inner circle of the bracket 43 is provided with a heating plate 44, the bracket 43 is made of high temperature resistant and heat-insulating material, the auxiliary working equipment of the heating plate 44 is arranged on the carrier 41, the outer wall of the top plate 45 is fixedly connected to the tank body 1, and a sealing ring is provided at the bottom of the top plate 45.

[0056] Drive the telescopic rod 1 42 to push the bracket 43 upward, and the heating plate 44 follows the bracket 43 to move upward. When the top of the bracket 43 is in contact with the top plate 45 without a gap, stop driving the telescopic rod 2 42, the bracket 43, the heating plate 44 and the top plate 45 separate the tank body 1, and the added leachate, treatment liquid and other additives all stay above the heating plate 44, and then drive the heating plate 44 to heat the liquid in the tank body 1. At the same time, when only sediment remains in the tank body 1, the sediment can be heated into a solid state, and then the telescopic rod 1 42 is retracted, the bracket 43 and the heating plate 44 are moved downward, and the solid sediment on the bracket 43 and the heating plate 44 follows the downward movement, and then the mobile carrier 41 is moved out of the tank body 1 through the taking port 2, and then the solid sediment on the bracket 43 and the heating plate 44 is taken out, so that it is convenient to heat the leachate, and at the same time, it is convenient to treat the sediment in the tank body 1 and to clean the tank body 1.

[0057] The capping mechanism 3 is used to move the capping opening 2; the capping mechanism 3 includes a sliding seat 31 which is slidably connected to the outer wall of the tank body 1, and a sealing plate 32 for sealing the capping opening 2 is connected to the sliding seat 31 through a hinge. A handle 34 for assisting in opening the sealing plate 32 is provided on the end of the sealing plate 32 away from the sliding seat 31, and a latch 33 for limiting the opening of the sealing plate 32 is movably inserted into the handle 34. The sliding seat 31 is provided with two groups of symmetrically distributed on the tank body 1. The sliding seat 31 is used to support the flipping and movement of the sealing plate 32. The sealing plate 32 is an arc-shaped plate, and the arc length of the sealing plate 32 is less than or equal to one-half of the circumference of the bottom surface of the tank body 1. The latch 33 is a T-shaped latch. A limiting ring for installing the latch 33 is provided on the tank body 1 above the handle 34, and the limiting ring is used to limit the horizontal movement of the latch 33.

[0058] Take out the latch 33, pull the handle 34, pull the sealing plate 34 through the handle 34 and then rotate it on the sliding seat 31 to open the sealing plate 34. The sealing plate 34 can also be pushed to one side of the sliding seat 31, and the sealing plate 34 moves along the outer wall of the tank body 1 through the sliding seat 31. After the sealing plate 34 is opened, the tank body 1 can be entered through the taking port 2. The sealing plate 34 has multiple opening methods to meet various working environments.

[0059] Technical principle of the present invention:

[0060] The core of the present invention lies in its ingeniously designed driving and mixing system, as well as the flexible aeration, drainage, cleaning and heating treatment processes. First, by driving the precise movement of the telescopic rod 62, the telescopic rod 61 serves as a direct power source to push the fixed block 62 and the fixed seat 63 below it to move upward smoothly. During this process, the cover plate 5 closely connected to the fixed seat 63 also rises accordingly. The tiny gap between the cover plate 5 and the tank body 1 is cleverly utilized to achieve precise injection of the leachate. Once the leachate is injected, the fixed seat 63 and the cover plate 5 are moved downward synchronously by reversing the telescopic rod 62 to tightly seal the opening at the top of the tank body 1 to ensure the sealing during the treatment process.

[0061] Then, the treatment liquid is slowly added through the feed port at the top of the tank body. At this time, the stirrer 5 is started, and the powerful power generated by its rotation efficiently mixes the liquid in the tank body 1. In order to further improve the mixing effect, the system can repeatedly lift the telescopic rod 62 to drive the stirrer 5 to move up and down in the tank body. This dynamic mixing method not only enhances the uniformity of the liquid, but also ensures that the fixed seat 63 of the stirrer 5 is always firmly connected to the tank body 1 during the lifting process, avoiding any possible separation, thereby improving the stability and efficiency of the entire mixing process.

[0062] During the mixing process, the aeration mechanism also plays an important role; after the free end of the hose 83 is connected to the gas source, the gas passes through the hose 83, the valve body 82, and the through pipe 81 in sequence, and finally enters the cavity of the fixed seat 84, and is evenly sprayed out by the nozzle 85, so as to fully aerate the liquid in the tank body 1. In order to enhance the aeration effect, the lifting mechanism 6 plays a role again, driving the cover plate 5 and the aeration mechanism 8 connected thereto to rise and fall repeatedly. This dynamic aeration method not only increases the contact area between the gas and the liquid, but also promotes the oxidation reaction of the liquid, thereby accelerating the treatment process.

[0063] When the liquid is treated to the stage where sedimentation is required, the treated liquid can be directly discharged through the drain pipe on the side wall of the tank body 1, or by connecting the water pump and the hose 83, the liquid can be reversely extracted through the nozzle 85 and discharged through the cavity of the fixed seat 84, the through pipe 81, the valve body 82 and the hose, providing flexible drainage options.

[0064] After the sediment in the tank is processed, the cleaning step is also simple and efficient. The hose 83 is connected to the water source, and the clean water flows into the tank along the same path, and is evenly sprayed through the nozzle 85 to fully rinse the inside of the tank, ensuring the cleanliness and hygiene of the equipment.

[0065] In addition, the heating treatment system of the present invention is also very innovative. By driving the telescopic rod 42, the bracket 43 and the heating plate 44 thereon are pushed upward until the top of the bracket 43 is tightly fitted with the top plate 45 to form a temporary isolation space. In this space, the added leachate, treatment liquid and other additives are effectively isolated, and then the heating plate 44 is started to heat the liquid. In particular, when only sediment is left in the tank, heating can convert the sediment into a solid state for subsequent processing. By contracting the telescopic rod 42, the bracket 43 and the heating plate 44 move downward together with the solid sediment, and finally the tank is easily removed from the taking port 2 by the mobile carrier 41, thereby realizing convenient processing of the sediment.

[0066] Finally, the design of the sealing plate 34 fully considers the flexibility of actual operation. Whether it is to open by pulling the handle 34 and rotating it on the sliding seat 31, or to push the sealing plate 34 to one side to slide it along the outer wall of the tank body, it provides users with a variety of options to adapt to the needs of different working environments, ensuring the wide applicability and ease of operation of the equipment.

[0067] 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. Heavy metal leachate circulation purification device, characterized in that: include: A tank body (1), the tank body (1) is used for temporarily storing heavy metal leachate, and the tank body (1) is provided with a taking port (2); A capping mechanism (3), the capping mechanism (3) being used for moving and capping the access opening (2); A heating mechanism (4), wherein the heating mechanism (4) is used to heat the liquid in the tank body (1); A lifting mechanism (6), wherein a cover plate (5) is provided on the lifting mechanism (6) and is used to move the cover plate (5) to seal the top opening of the tank body (1); an aeration mechanism (8), the aeration mechanism (8) being used to supply air and liquid into the tank body (1); The tank body (1) is provided with a taking port (2) on the side wall at the bottom, a sealing mechanism (3) is provided on the tank body (1) on one side of the taking port (2), a heating mechanism (4) is provided at the bottom of the tank body (1) on one side of the taking port (2), an aeration mechanism (8) is provided above the heating mechanism (4), the aeration mechanism (8) is fixedly connected to a cover plate (5), and a stirrer (7) and a feeding pipe are provided on the cover plate (5).

2. A heavy metal leachate circulation purification device according to claim 1, characterized in that: The aeration mechanism (8) comprises a through pipe (81) fixedly passing through the cover plate (5); the top of the through pipe (81) is connected to a valve body (82); the free end of the valve body (82) is connected to a hose (83); the bottom of the through pipe (81) is connected to a fixed seat (84); a nozzle (85) is fixedly passed through the fixed seat (84); and the fixed seat (84) is used to connect the through pipe (81) and the nozzle (85).

3. A heavy metal leachate circulation purification device according to claim 1, characterized in that: The heating mechanism (4) comprises a carrier (41) movably arranged on the inner bottom of the tank body (1), the carrier (41) being provided with a telescopic rod (42), the protruding end of the telescopic rod (42) being connected to a bracket (43) and being used to push the bracket (43) to rise and fall, the bracket (43) being provided with a heating plate (44) for heating liquid, the top of the bracket (43) being movably attached to a top plate (45) for horizontally partitioning the inside of the tank body (1).

4. A heavy metal leachate circulation purification device according to claim 1, characterized in that: The sealing mechanism (3) comprises a sliding seat (31) slidably engaged with the outer wall of the can body (1); a sealing plate (32) for sealing the taking opening (2) is connected to the sliding seat (31) via a hinge; a handle (34) for assisting in opening the sealing plate (32) is provided on one end of the sealing plate (32) away from the sliding seat (31); a latch (33) for limiting the opening of the sealing plate (32) is movably inserted into the handle (34).

5. A heavy metal leachate circulation purification device according to claim 1, characterized in that: The lifting mechanism (6) comprises a second telescopic rod (61) arranged on the outer wall of the tank body (1), the protruding end of the second telescopic rod (61) is connected to a fixing block (62) and is used to push the fixing block (62) to rise and fall, and the bracket (43) is connected to a fixing seat (63) for mounting the cover plate (5).

6. A heavy metal leachate circulation purification device according to claim 2, characterized in that: The through pipe (81) is a hard pipe. The through pipe (81) is provided with at least two groups. The valve body (82) is used to control the communication state between the hose (83) and the through pipe (81).

7. A heavy metal leachate circulation purification device according to claim 2, characterized in that: The hose (83) is a bendable elastic telescopic tube, the fixing seat (84) is a disc-shaped structure, and a cavity for connecting the through pipe (81) and the nozzle (85) is provided inside the fixing seat (84).

8. A heavy metal leachate circulation purification device according to claim 3, characterized in that: The size of the carrier (41) is smaller than the bottom size of the tank body (1). The carrier (41) enters the tank body (1) through the taking port (2). The bracket (43) and the top plate (45) are both annular structures. The inner circle of the bracket (43) is provided with a heating plate (44). The bracket (43) is made of high-temperature resistant and heat-insulating material. The auxiliary working equipment of the heating plate (44) is arranged on the carrier (41). The outer wall of the top plate (45) is fixedly connected to the tank body (1). A sealing ring is provided at the bottom of the top plate (45).

9. A heavy metal leachate circulation purification device according to claim 4, characterized in that: The sliding seat (31) is provided with two groups symmetrically distributed on the tank body (1), and the sliding seat (31) is used to support the flipping and movement of the sealing plate (32), the sealing plate (32) is an arc-shaped plate, and the arc length of the sealing plate (32) is less than or equal to half of the circumference of the bottom surface of the tank body (1), the latch (33) is a T-shaped latch, and a limiting ring for installing the latch (33) is provided on the tank body (1) above the handle (34), and the limiting ring is used to limit the horizontal movement of the latch (33).

10. The heavy metal leachate circulation purification device according to claim 5, characterized in that: The fixing block (62) is used to connect the second telescopic rod (61) and the fixing seat (63); the outer diameter of the fixing seat (63) is larger than the diameter of the tank body (1); and the height of the fixing seat (63) is less than or equal to the height of the spray head (85).

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