Multi-stage leaching tank tandem type bottom mud heavy metal elution pretreatment equipment

Abstract

The utility model discloses bottom mud heavy metal elution pretreatment equipment with multiple stages of tandem leaching tanks, relates to the technical field of bottom mud heavy metal elution pretreatment, and aims to solve the problems that when microbial agents are added, local concentration of the agents is easy to occur, and the agents at the bottom mud are distributed unevenly, the bottom mud heavy metal elution pretreatment equipment comprises a leaching barrel, and the bottom end of the leaching barrel is fixedly connected with a bottom box; the plurality of screens are arranged on the inner wall of the leaching barrel, can move up and down in a small range, are arranged in a layered manner in the height direction of the leaching barrel, and are used for screening and filtering gravel in the heavy metal in the bottom mud; the microbial agent box is arranged on one side of the leaching barrel; and a plurality of stirring members. The multistage leaching tank tandem type bottom mud heavy metal elution pretreatment equipment disclosed by the utility model has a layered conveying design, so that a microbial agent can cover bottom mud on a layered screen in an omnibearing and dead-angle-free manner, the local excessive or insufficient amount of the agent is avoided, all parts of the bottom mud are ensured to fully react with the agent, and the heavy metal elution effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy metal elution pretreatment of bottom mud, in particular to multi-stage elution tank series-connected bottom mud heavy metal elution pretreatment equipment. Background Art

[0002] One of the main pollutants in rivers and lakes is heavy metals. It is a persistent pollutant that is difficult to remove once it enters the environment. Once the water body is contaminated by heavy metals, the heavy metal pollutants accumulated in the bottom sediment are not fixed. When the pH, water temperature and other conditions change, the heavy metals are released and enter the water body again, causing secondary pollution.

[0003] The method of adding microbial agents in existing devices is prone to the concentration of agents in local areas, resulting in too much agent in some parts of the bottom mud and too little in others. Due to the uneven distribution of the agent, there will be dead corners in the bottom mud that have not fully reacted with the agent, and heavy metals will remain. It is necessary to repeatedly add agents and extend the reaction time to wait for the lagging area. Utility Model Content

[0004] The utility model discloses a multi-stage elution tank series-type bottom mud heavy metal elution pretreatment equipment, which aims to solve the technical problem that when the existing device adds microbial agents, the agents are easily concentrated locally, resulting in uneven distribution of the agents in the bottom mud, forming residual heavy metals in the reaction dead corners, and requiring repeated addition of agents, which prolongs the reaction time.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a multi-stage elution tank series-type sediment heavy metal elution pretreatment equipment, comprising: a elution tank, the bottom end of which is fixedly connected to a bottom box; a plurality of screens, arranged on the inner wall of the elution tank and arranged in layers along the height direction of the elution tank, the screens being used to screen and filter the sand and gravel inside the sediment heavy metals; a microbial agent box, arranged on one side of the elution tank; a plurality of stirring members, all arranged inside the elution tank, the stirring members being respectively arranged in the upper area of ​​each layer of the screen, the stirring members being used to The heavy metals in the bottom mud are eluted and stirred; the microbial agent evenly spreading component is arranged on the inner wall of the rinsing barrel, and the microbial agent evenly spreading component is arranged in layers in the area above the stirring element. The microbial agent evenly spreading component is used to evenly spread the microbial agent when eluting the heavy metals in the bottom mud, so that the microbial agent is evenly distributed; the sand and gravel vibration falling and cleaning component is arranged inside the rinsing barrel, and the sand and gravel vibration falling and cleaning component is arranged on the inner side of the screen. The sand and gravel vibration falling and cleaning component is used to vibrate the screen up and down to make the sand and gravel blocked in the screen fall off and clean.

[0006] In a preferred embodiment, the microbial agent uniform distribution component includes: a water pump, which is fixedly connected to the top of the microbial agent box, and the output end of the water pump is fixedly connected to a layered delivery pipe. A plurality of circular holes are opened on the outside of the rinsing barrel, and the outer sides of the ends of the layered delivery pipes away from the water pump are fixedly connected to the inside of the circular holes; a plurality of annular pipes are all arranged on the inner wall of the rinsing barrel, and the outer sides of the annular pipes are all fixedly connected to the ends of the layered delivery pipes away from the water pump; a plurality of spray heads are all located inside the annular pipes, and the spray heads are used to evenly spray the microbial agent.

[0007] In a preferred embodiment, the interior of the rinsing barrel is fixedly connected with a plurality of fixing parts, the inner walls of the fixing parts are fixedly connected to the outside of the annular pipe, the opposite side of the annular pipe is fixedly connected with a plurality of spray pipes, the front ends of the spray pipes are fixedly connected to the top of the spray head, and the top of the microbial agent box is fixedly connected with a fixing frame, the water pump is located inside the fixing frame, the top of the fixing frame is fixedly connected with a guide member, and the layered delivery pipe is located inside the guide member.

[0008] In a preferred solution, the sand and gravel vibration shedding cleaning assembly includes: a forward and reverse motor, the bottom end of which is fixedly connected to the bottom inner wall of the bottom box, the power output shaft of the forward and reverse motor is connected to a limiting threaded rod through a coupling, the bottom end of the washing bucket and the top end of the bottom box are both provided with holes, the outer side of the limiting threaded rod is movably connected to the inner wall of the hole, and the threaded ends of the limiting threaded rod are both connected to the inner side of the screen through threads; a plurality of symmetrical vibration springs are both fixedly connected to both sides of the top of the screen; a guide rod, the outer side of the screen is provided with a through hole, the outer side of the guide rod is movably connected to the inner wall of the through hole, the bottom end of the guide rod is fixedly connected to the bottom inner wall of the washing bucket, a plurality of symmetrical sliding holes are provided on the screen, and the guide rod and the limiting threaded rod are both arranged inside the sliding hole.

[0009] In a preferred embodiment, two top plates are fixedly connected to the inner wall of the washing bucket, and the bottom ends of the top plates are fixedly connected to the top ends of the limiting threaded rod and the guide rod. Two fixed plates are arranged above each screen, one fixed plate is slidably connected to the outside of the guide rod, and a threaded hole is opened in the middle of the other fixed plate and is connected to the threaded connection of the limiting threaded rod through the inner wall thread. The outer sides of the fixed plates are fixedly connected to sliding blocks, and the sliding blocks are slidably connected to the inner wall of the washing bucket. The top ends of the vibration springs are fixedly connected to the bottom ends of the symmetrical fixed plates.

[0010] In a preferred embodiment, the top of the rinsing barrel is fixedly connected to a feed port, the inner wall of the bottom end of the bottom box is fixedly connected to a drive motor, and the power output shaft of the drive motor is connected to a stirring shaft through a coupling, and a rotating hole is provided at the bottom end of the rinsing barrel and the top end of the bottom box, and the outer side of the stirring shaft is movably connected to the inside of the rotating hole, and the outer side of the stirring shaft is fixedly connected to a fixing ring, and the outer side of the fixing ring is fixedly connected to the side opposite to the stirring member.

[0011] From the above, it can be seen that the multi-stage elution tank series-type sludge heavy metal elution pretreatment equipment provided by the utility model has a layered conveying design, which allows the microbial agent to cover the sludge on the layered screen in an all-round and dead-angle manner, avoiding excessive or insufficient local agents, ensuring that the sludge reacts fully with the agent at all locations, and improving the technical effect of heavy metal elution. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the multi-stage elution tank series type sediment heavy metal elution pretreatment equipment proposed by the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the elution barrel portion of the multi-stage elution tank series-type sediment heavy metal elution pretreatment equipment proposed by the utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of the elution barrel of the multi-stage elution tank series type sediment heavy metal elution pretreatment equipment proposed by the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the microbial agent uniform distribution component of the multi-stage elution tank series-type sediment heavy metal elution pretreatment equipment proposed by the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the sand and gravel vibration shedding and cleaning component of the multi-stage elution tank series-type bottom mud heavy metal elution pretreatment equipment proposed by the utility model.

[0017] In the accompanying drawings: 1. Rinse bucket; 2. Bottom box; 3. Microbial agent box; 4. Microbial agent uniform distribution assembly; 401. Water pump; 402. Fixed frame; 403. Layered conveying pipe; 404. Guide member; 405. Fixed member; 406. Annular pipe; 407. Spray pipe; 408. Spray head; 5. Screen; 6. Sand and gravel vibration shedding cleaning assembly; 601. Forward and reverse motor; 602. Limiting threaded rod; 603. Sliding block; 604. Vibration spring; 605. Fixed plate; 606. Top plate; 607. Guide rod; 7. Stirring member; 8. Stirring shaft; 9. Feed inlet; 10. Fixed ring; 11. Drive motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] The multi-stage elution tank series-type sludge heavy metal elution pretreatment equipment disclosed by the utility model is mainly used in scenarios where, when microbial agents are added to existing devices, local concentration of agents is likely to occur, resulting in uneven distribution of agents in the sludge, residual heavy metals in reaction dead corners, and the need for repeated replenishment of agents and prolonged reaction time.

[0020] Reference Figure 1-Figure 5 , a multi-stage elution tank series-type sediment heavy metal elution pretreatment equipment, comprising: a elution bucket 1, the bottom end of the elution bucket 1 is fixedly connected to a bottom box 2; a plurality of screens 5 are arranged on the inner wall of the elution bucket 1, the screen 5 can move up and down in a small range, and the screen 5 is used to screen and filter the sand and gravel inside the sediment heavy metals; a microbial agent box 3 is arranged on one side of the elution bucket 1; a plurality of stirring members 7 are all arranged inside the elution bucket 1, and the stirring members 7 are all used to elute and stir the sediment heavy metals; a microbial agent uniform distribution component 4 is arranged on the inner wall of the elution bucket 1, and the microbial agent uniform distribution component 4 is used to evenly distribute the microbial agent when eluting the sediment heavy metals, so that the microbial agent is evenly distributed; a sand and gravel vibration falling off cleaning component 6 is arranged on the inner wall of the elution bucket 1, and the sand and gravel vibration falling off cleaning component 6 is used to vibrate the screen 5 up and down to make the sand and gravel blocked in the screen 5 fall off and clean.

[0021] Reference Figure 1-Figure 4 In a preferred embodiment, the microbial agent uniform distribution component 4 includes: a water pump 401, the water pump 401 is fixedly connected to the top of the microbial agent box 3, the output end of the water pump 401 is fixedly connected to the layered delivery pipe 403, and a plurality of circular holes are opened on the outside of the rinsing bucket 1, and the outer sides of the ends of the layered delivery pipes 403 away from the water pump 401 are fixedly connected to the inside of the circular holes; a plurality of annular pipes 406 are all arranged on the inner wall of the rinsing bucket 1, and the outer sides of the annular pipes 406 are all fixedly connected to the ends of the layered delivery pipes 403 away from the water pump 401; a plurality of spray heads 408 are all located inside the annular pipes 406, and the spray heads 408 are used to evenly spray the microbial agent.

[0022] In this solution, a plurality of fixing parts 405 are fixedly connected to the inside of the rinsing barrel 1, the inner walls of the fixing parts 405 are fixedly connected to the outside of the annular pipe 406, a plurality of spray pipes 407 are fixedly connected to the opposite side of the annular pipe 406, the front ends of the spray pipes 407 are fixedly connected to the top of the spray head 408, and the top of the microbial agent box 3 is fixedly connected to the fixing frame 402, the water pump 401 is located inside the fixing frame 402, the inner side of the fixing frame 402 is fixedly connected to the guide part 404, and the layered delivery pipe 403 is located inside the guide part 404.

[0023] In the microbial agent uniform distribution component 4, through the layout of the annular pipe 406, the multiple spray heads 408, and the layered conveying design, the microbial agent can cover the bottom mud on the layered screen 5 in an all-round and dead-angle manner, avoiding excessive or insufficient local agent, ensuring that the bottom mud fully reacts with the agent, improving the heavy metal elution effect, and making the bottom mud treatment more thorough. The evenly distributed agent can act on the bottom mud synchronously, allowing the reaction between the heavy metals in the bottom mud and the agent to proceed evenly at the same time, without the need to repeatedly add agents and wait for reactions, shortening the single elution cycle, indirectly improving the overall processing efficiency, and helping to quickly complete the bottom mud heavy metal elution operation.

[0024] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5 In a preferred embodiment, the sand and gravel vibration shedding cleaning component 6 includes: a forward and reverse motor 601, the bottom end of which is fixedly connected to the bottom inner wall of the bottom box 2, and the power output shaft of the forward and reverse motor 601 is connected to the limiting threaded rod 602 through a coupling. The bottom end of the washing bucket 1 and the top of the bottom box 2 are both provided with holes, the outer side of the limiting threaded rod 602 is movably connected to the inner wall of the hole, and the threaded ends of the limiting threaded rod 602 are all connected to the inner side of the screen 5 through threads; a plurality of vibration springs 604 are all fixedly connected to the top of the screen 5; a guide rod 607, the outer side of the screen 5 is provided with a through hole, the outer side of the guide rod 607 is movably connected to the inner wall of the through hole, and the bottom end of the guide rod 607 is fixedly connected to the bottom inner wall of the washing bucket 1.

[0025] In this solution, two top plates 606 are fixedly connected to the inner wall of the washing bucket 1, and the bottom ends of the top plates 606 are fixedly connected to the top ends of the limiting threaded rod 602 and the guide rod 607. Two fixed plates 605 are arranged above each screen 5, one fixed plate 605 is slidably connected to the outside of the guide rod 607, and a threaded hole is opened in the middle of the other fixed plate 605 and is connected to the threaded connection of the limiting threaded rod 602 through the inner wall thread. The outer side of the fixed plate 605 is fixedly connected with a sliding block 603, and the sliding blocks 603 are all slidably connected to the inner wall of the washing bucket 1. The top ends of the vibration springs 604 are fixedly connected to the bottom ends of the symmetrical fixed plates 605.

[0026] The continuous up and down vibration of the sand and gravel vibration shedding and cleaning component 6 can shake off the sand and gravel that block the screen 5 in time, avoid the mesh being blocked, and allow the screen 5 to always maintain good screening performance. The bottom mud can pass through the screen 5 smoothly and will not affect the subsequent washing process due to blockage and accumulation, thereby ensuring the efficient operation of the screening link of the entire bottom mud treatment and improving the overall treatment efficiency.

[0027] Reference Figure 1-Figure 5 In a preferred embodiment, the top of the rinsing bucket 1 is fixedly connected to the feed port 9, the inner wall of the bottom end of the bottom box 2 is fixedly connected to the drive motor 11, and the power output shaft of the drive motor 11 is connected to the stirring shaft 8 through a coupling. The bottom end of the rinsing bucket 1 and the top of the bottom box 2 are both provided with rotating holes, the outer sides of the stirring shaft 8 are movably connected to the inside of the rotating holes, and the outer sides of the stirring shaft 8 are fixedly connected to the fixing rings 10, and the outer sides of the fixing rings 10 are fixedly connected to the opposite side of the stirring member 7.

[0028] Working principle: the bottom mud containing heavy metals is put into the leaching barrel 1 through the feed port 9. The feed port 9 serves as a channel for the bottom mud to enter the device, which can control the amount and rhythm of the bottom mud to be put in so that the bottom mud falls evenly into the leaching barrel 1; the water pump 401 is powered on and started to extract the microbial agent from the microbial agent box 3. The water pump 401 is fixed in the fixing frame 402 at the top of the microbial agent box 3. With the help of its own pump body structure, the agent is sucked from the box to the output end to provide power for the agent delivery. The extracted agent enters the layered delivery pipe 403 connected to the output end of the water pump 401. The agent is transported to multiple annular pipes 406 on the inner wall of the leaching barrel 1 through the layered delivery pipe 403. The annular pipe 406 is fixed to the barrel wall through the fixing piece 405 in the leaching barrel 1 to ensure a stable installation. The agent is temporarily stored and diverted in the annular pipe 406, and the annular layout is used to create conditions for subsequent uniform spraying, so that the agent coverage range adapts to the layered structure of the screen 5 and enters the annular pipe The reagent in the channel 406 is transported to the corresponding spray head 408 through the spray pipe 407 connected to the opposite side of the pipeline. After the spray head 408 is turned on, the reagent is sprayed out in the form of a spray. Based on the circumferential distribution of the annular pipeline 406 and the cooperation of the multiple spray heads 408, the microbial reagent is evenly covered on the bottom mud surface at the top of each layer of the screen 5, providing a uniform environment for the reaction between the bottom mud and the reagent, and ensuring the subsequent elution effect; the drive motor 11 in the bottom box 2 is started, driving the stirring shaft 8 to rotate, and the fixed ring 10 outside the stirring shaft 8 rotates with the shaft, driving the connected stirring member 7 to move synchronously. The stirring member 7 is arranged in layers in the elution barrel 1, and when it rotates with the stirring shaft 8, the bottom mud on each layer of the screen 5 is stirred. Through stirring, the bottom mud and the microbial reagent are fully contacted and mixed, promoting the reaction between heavy metals and the reagent, and realizing the elution of heavy metals from the bottom mud; at the same time, the multi-layer stirring structure can process the bottom mud layer by layer, improving the comprehensiveness and thoroughness of the elution;The forward and reverse motor 601 is energized to work, driving the limiting threaded rod 602 to rotate alternately in forward and reverse directions within the limited range of the holes in the rinsing bucket 1 and the bottom box 2. The surface of the limiting threaded rod 602 has a threaded structure, which forms a thread pair with the fixed plate 605. When the limiting threaded rod 602 rotates, the helix angle characteristics of the thread convert the rotational motion into a linear motion of the fixed plate 605 along the axial direction of the limiting threaded rod 602. At the same time, the guide rod 607 passes through the sliding hole of the screen 5, and its outer side is slidably connected to the fixed plate 605, which plays a guiding and anti-rotation role for the fixed plate 605, and cooperates with the sliding block 603 to slide along the inner wall of the rinsing bucket 1 to ensure that the fixed plate 605 moves up and down stably without deflection or jamming. The bottom end of the fixed plate 605 is connected to the vibration spring 604, and the lower end of the vibration spring 604 is fixed to the two top ends of the screen 5. On the other hand, when the fixed plate 605 moves up and down, it applies periodic tensile and compressive forces to the vibration spring 604. The vibration spring 604 is forced to deform, transmitting the force to the screen 5. At the same time, its own elastic recovery characteristics further enhance the vibration effect of the screen 5. Under the limit of the sliding hole of the guide rod 607, the screen 5 follows the movement of the fixed plate 605 and the vibration spring 604, generating high-frequency, small-amplitude up and down vibrations. When the screen 5 vibrates, the sand and gravel stuck in the mesh are separated from the mesh by the inertial force and impact force generated by the vibration of the screen 5, as well as the "shaking off" effect brought about by the vibration. These overcome the friction and extrusion force between the sand and gravel and the mesh, and fall into the space below the rinsing bucket 1, completing the cleaning of the screen 5. This ensures the normal separation and filtration of the sand and gravel from the cleaning liquid during the rinsing process, and realizes the function of the sand and gravel vibration shedding cleaning component.

[0029] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. Multi-stage elution tank series type sediment heavy metal elution pretreatment equipment, characterized in that: include: A rinsing bucket (1) is provided with a bottom box (2) fixedly connected to the bottom end of the rinsing bucket (1); a plurality of screens (5) are provided on the inner wall of the rinsing bucket (1); the screens (5) can move up and down within a small range and are arranged in layers along the height direction of the rinsing bucket (1); the screens (5) are used to screen and filter the sand and gravel inside the bottom mud heavy metals; a microbial agent box (3) is provided on one side of the rinsing bucket (1); a plurality of stirring members (7) are provided inside the rinsing bucket (1), the stirring members (7) are respectively provided in the upper area of ​​each layer of the screen (5), and the stirring members (7) are used to elute and stir the bottom mud heavy metals; microorganism reagent box (3) is provided on one side of the rinsing bucket (1); a plurality of stirring members (7) are provided inside the rinsing bucket (1), the stirring members (7) are respectively provided in the upper area of ​​each layer of the screen (5), and the stirring members (7) are used to elute and stir the bottom mud heavy metals; A biological agent uniform distribution component (4) is provided on the inner wall of the rinsing barrel (1), and the biological agent uniform distribution component (4) is arranged in layers in the area above the stirring member (7). The biological agent uniform distribution component (4) is used to uniformly distribute the biological agent when eluting heavy metals from the bottom mud, so that the biological agent is evenly distributed; a sand and gravel vibration shedding cleaning component (6) is provided inside the rinsing barrel (1), and the sand and gravel vibration shedding cleaning component (6) is provided on the inner side of the screen (5). The sand and gravel vibration shedding cleaning component (6) is used to vibrate the screen (5) up and down, so that the sand and gravel blocked in the screen (5) fall off and are cleaned.

2. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 1 is characterized in that: The microbial agent uniform distribution component (4) includes: a water pump (401), the water pump (401) is fixedly connected to the top of the microbial agent box (3), the output end of the water pump (401) is fixedly connected to the layered delivery pipe (403), the outside of the rinsing bucket (1) is provided with a plurality of circular holes, and the outer sides of one end of the layered delivery pipe (403) away from the water pump (401) are fixedly connected to the inside of the circular holes; a plurality of annular pipes (406), all arranged on the inner wall of the rinsing bucket (1), and the outer sides of the annular pipes (406) are fixedly connected to one end of the layered delivery pipe (403) away from the water pump (401); and a plurality of spray heads (408), all located inside the annular pipes (406), and the spray heads (408) are used to evenly spray the microbial agent.

3. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 2 is characterized in that: The interior of the washing barrel (1) is fixedly connected to a plurality of fixing members (405), the inner walls of the fixing members (405) are fixedly connected to the outside of the annular pipe (406), the opposite side of the annular pipe (406) is fixedly connected to a plurality of spray pipes (407), the front ends of the spray pipes (407) are fixedly connected to the top of the spray head (408), and the top of the microbial agent box (3) is fixedly connected to a fixing frame (402), the water pump (401) is located inside the fixing frame (402), the top of the fixing frame (402) is fixedly connected to a guide member (404), and the layered delivery pipe (403) is located inside the guide member (404).

4. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 1 is characterized in that: The sand and gravel vibration shedding cleaning assembly (6) comprises: a forward and reverse motor (601), the bottom end of which is fixedly connected to the inner wall of the bottom end of the bottom box (2); a power output shaft of the forward and reverse motor (601) is connected to a limiting threaded rod (602) through a coupling; the bottom end of the washing bucket (1) and the top end of the bottom box (2) are both provided with holes, and the outer side of the limiting threaded rod (602) is movably connected to the inner wall of the hole; a plurality of symmetrical vibration springs (604) are both fixedly connected to both sides of the top end of the screen (5); a guide rod (607), the outer side of the screen (5) is provided with a through hole, the outer side of the guide rod (607) is movably connected to the inner wall of the through hole, the bottom end of the guide rod (607) is fixedly connected to the inner wall of the bottom end of the washing bucket (1), the screen (5) is provided with a plurality of symmetrical sliding holes, and the guide rod (607) and the limiting threaded rod (602) are both arranged inside the sliding holes.

5. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 4 is characterized in that: The inner wall of the washing barrel (1) is fixedly connected to two top plates (606), and the bottom ends of the top plates (606) are fixedly connected to the top ends of the limiting threaded rod (602) and the guide rod (607). Two fixed plates (605) are provided above each screen (5), one fixed plate (605) is slidably connected to the outside of the guide rod (607), and the other fixed plate (605) has a threaded hole in the middle and is rotatably connected to the threaded connection of the limiting threaded rod (602) through the inner wall thread, and the outer sides of the fixed plates (605) are fixedly connected to sliding blocks (603), and the sliding blocks (603) are slidably connected to the inner wall of the washing barrel (1). The top ends of the vibration springs (604) are fixedly connected to the bottom ends of the symmetrical fixed plates (605).

6. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 1 is characterized in that: The top of the washing barrel (1) is fixedly connected to a feed port (9), the bottom inner wall of the bottom box (2) is fixedly connected to a drive motor (11), and the power output shaft of the drive motor (11) is connected to a stirring shaft (8) via a coupling.

7. The multi-stage elution tank series type sediment heavy metal elution pretreatment equipment according to claim 6 is characterized in that: The bottom end of the washing barrel (1) and the top end of the bottom box (2) are both provided with a rotation hole, the outer side of the stirring shaft (8) is movably connected to the inside of the rotation hole, and the outer side of the stirring shaft (8) is fixedly connected to a fixing ring (10), and the outer side of the fixing ring (10) is fixedly connected to the opposite side of the stirring member (7).

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