Adsorption type heavy metal contaminated soil treatment equipment

Abstract

The invention relates to the technical field of contaminated soil treatment, and discloses adsorption type heavy metal contaminated soil treatment equipment which comprises a treatment bin, a filter plate is arranged at the top of the treatment bin, and a grouting mechanism used for injecting soil and leacheate mixed slurry into the filter plate is arranged on the outer side of the treatment bin. An adsorption module used for adsorbing heavy metal is arranged in the treatment bin, a transverse fixing beam is fixed to the side face of the treatment bin, movable extrusion plates are arranged at the two ends of the filter plate, and deflection driving assemblies used for adjusting the distance between the extrusion plates and the filter plate are arranged at the two ends of the transverse fixing beam. And a scraping plate is arranged above the filtering plate. According to the adsorption type heavy metal contaminated soil treatment equipment, continuous operation of soil treatment is achieved through the synergistic effect of continuous feeding of the grouting mechanism and an alternate dewatering and deslagging mechanism of the scraping plate and the extrusion plate.

Description

Technical Field

[0001] This invention relates to the field of contaminated soil treatment technology, specifically an adsorption-type heavy metal contaminated soil treatment device. Background Technology

[0002] Soil is a precious natural resource upon which humankind depends for survival and development, and its quality directly affects the safety of agricultural products, the health of ecosystems, and the sustainable development of the social economy. Among numerous soil remediation technologies, ex-situ remediation methods based on the leaching-adsorption principle have attracted widespread attention due to their relatively reliable treatment effects and relatively controllable remediation cycles. The core of this technical route lies in the thorough mixing of specific chemical leaching agents with contaminated soil, desorbing heavy metal ions present in the solid-phase soil particles and transferring them to the liquid phase, thereby achieving solid-liquid separation. Subsequently, the leaching solution rich in heavy metals undergoes deep purification to achieve the final removal of heavy metals and the recycling of the leaching solution.

[0003] Currently, a typical adsorption-type treatment device on the market usually uses a vertical tank as the core reaction unit. In this device, contaminated soil and leachate are fed into the tank for mixing and stirring. After one batch of leachate is completed, the resulting slurry mixture is discharged and subjected to solid-liquid separation. The resulting liquid then flows through a subsequent module containing adsorbents (such as activated carbon, ion exchange resin, etc.) to complete the separation and enrichment of heavy metals. However, this "single-tank batch treatment" mode has inherent technical limitations. The device cannot achieve continuous feeding and discharging of soil. Each batch must undergo a complete cycle of loading, mixing, reaction, discharge, and washing. Subsequent adsorption treatment stages can only start after all the leachate from that batch has been produced, resulting in a large amount of waiting and intermittent time, which seriously restricts the overall treatment efficiency and equipment capacity. Therefore, it is necessary to develop an adsorption-type heavy metal contaminated soil treatment device that can achieve continuous and automated operation, thereby significantly improving the treatment throughput and efficiency. Summary of the Invention

[0004] This invention provides an adsorption-type heavy metal contaminated soil treatment device, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An adsorption-type heavy metal contaminated soil treatment device includes a treatment chamber. A filter plate is mounted on the top of the treatment chamber. A grouting mechanism is installed on the outside of the treatment chamber for injecting a mixture of soil and leachate into the filter plate. An adsorption module for adsorbing heavy metals is installed inside the treatment chamber. A transverse fixing beam is fixed to the side of the treatment chamber. Movable extrusion plates are installed at both ends of the filter plate. Deflection drive components for adjusting the distance between the extrusion plates and the filter plate are installed at both ends of the transverse fixing beam. A scraper is installed above the filter plate. A reciprocating lateral movement component is installed in the middle of the transverse fixing beam to drive the scraper to reciprocate along the surface of the filter plate, and to alternately press the scraper against the extrusion plates on both sides during movement. The filter plate has an arc-shaped structure recessed towards the interior of the treatment chamber, and baffles are installed on both sides of the filter plate to prevent slurry overflow.

[0006] As a preferred embodiment of the present invention, the reciprocating transverse component includes a vertical mounting plate fixedly installed in the middle of the transverse fixed beam. A deflection shaft is rotatably connected to the end of the vertical mounting plate. One end of the deflection shaft near the middle of the processing chamber is fixedly connected to one end of a swing arm. The other end of the swing arm is fixedly connected to the middle of the scraper. A motor mounting base is provided on the side of the vertical mounting plate. A rotary drive device for driving the deflection shaft to rotate is provided on the motor mounting base.

[0007] As a preferred embodiment of the present invention, the deflection drive assembly includes a fixed frame disposed at the end of a transverse fixed beam, a support shaft disposed on the side of the fixed frame, the support shaft being rotatably connected to the middle of a deflection plate, one end of the deflection plate being fixedly connected to a pressing plate, the other end of the deflection plate being fixedly connected to the end of a thrust rod, the middle of the fixed frame being rotatably connected to an ejector cylinder, and the end of the piston rod of the ejector cylinder being rotatably connected to the middle of the thrust rod.

[0008] As a preferred embodiment of the present invention, a vertical partition is provided in the middle of the treatment chamber, which divides the interior of the treatment chamber into a slurry settling chamber and an adsorption purification chamber. A guide plate is provided on the inner wall of the treatment chamber on one side of the adsorption purification chamber. The guide plate extends from the inner wall of the treatment chamber into the slurry settling chamber and is inclined toward the bottom of the slurry settling chamber. The lower edge of the guide plate is higher than the top edge of the vertical partition.

[0009] As a preferred embodiment of the present invention, a flow stabilizing baffle is provided in the slurry settling chamber. The flow stabilizing baffle is located below the guide plate, and the bottom end of the flow stabilizing baffle is lower than the top end of the vertical baffle. A sludge discharge pipe is provided on the bottom side wall of the treatment chamber corresponding to the slurry settling chamber, and a sewage pump is connected to the sludge discharge pipe.

[0010] In a preferred embodiment of the present invention, the adsorption purification chamber has multiple parallel guide rails arranged on the vertical partition and the inner wall of the treatment chamber. The adsorption module is slidably mounted on the guide rails. The treatment chamber has a purification liquid discharge pipe on its bottom side wall corresponding to the adsorption purification chamber. The adsorption module includes a mesh basket with a detachable sealing end cap at one opening. The sealing end cap has an operating handle. When the adsorption module is pushed into the adsorption purification chamber along the guide rails, the sealing end cap is located outside the treatment chamber.

[0011] As a preferred embodiment of the present invention, the grouting mechanism includes a mixing tank, inside which is a stirring device for mixing soil and leachate into a uniform slurry. A feed pump is connected to the bottom outlet of the mixing tank, and the output end of the feed pump is connected to a conveying pipe. The outlet of the conveying pipe leads to the top of the filter plate.

[0012] The present invention has the following advantages: 1. Achieved continuous and efficient operation: Through the continuous feeding of the grouting mechanism, combined with the alternating extrusion dewatering and slag discharge mechanism of the scraper and the double-sided extrusion plate, the traditional intermittent treatment mode has been completely changed, and the soil treatment efficiency and equipment utilization rate have been greatly improved.

[0013] 2. Improved dehydration efficiency and solid-liquid separation purity: Constant pressure controlled mechanical extrusion dehydration allows for more thorough separation of heavy metal contamination from soil particles. The subsequent slurry settling chamber enables deep settling, effectively removing suspended particles from the liquid, reducing the load on subsequent adsorption modules, preventing clogging, and ensuring adsorption efficiency and stability.

[0014] 3. Convenient and flexible operation and maintenance: The adsorption module adopts a guide rail sliding installation and external quick-release design, realizing the "hot-swappable" adsorption module. This allows the equipment to be maintained or different adsorbents to be replaced without interrupting operation, so as to adapt to different types of heavy metal pollution. The operation is simple and the maintenance cost is low. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the rear structure of an adsorption-type heavy metal contaminated soil treatment device.

[0017] Figure 2This is a right view of an adsorption-type heavy metal contaminated soil treatment device.

[0018] Figure 3 This is a schematic diagram of the structure of a scraper and filter plate in an adsorption-type heavy metal contaminated soil treatment device.

[0019] Figure 4 for Figure 3 The front view.

[0020] Figure 5 This is a schematic diagram of the reciprocating transverse component in an adsorption-type heavy metal contaminated soil treatment device.

[0021] Figure 6 This is a schematic diagram of the deflection drive component in an adsorption-type heavy metal contaminated soil treatment device.

[0022] Figure 7 This is a schematic diagram of the treatment chamber in an adsorption-type heavy metal contaminated soil treatment device.

[0023] Figure 8 This is a schematic diagram of the internal structure of the treatment chamber in an adsorption-type heavy metal contaminated soil treatment device.

[0024] Figure 9 This is a schematic diagram of the adsorption module in an adsorption-type heavy metal contaminated soil treatment device.

[0025] In the diagram: 1. Processing chamber; 2. Mixing tank; 3. Feed pump; 4. Agitator; 5. Conveying pipe; 6. Grouting mechanism; 7. Filter plate; 8. Scraper; 9. Extrusion plate; 10. Reciprocating transverse assembly; 11. Deflection drive assembly; 12. Baffle; 13. Transverse fixed beam; 14. Support shaft; 15. Deflection plate; 16. Thrust rod; 17. Ejection cylinder; 18. Vertical mounting plate; 19. Motor mounting base; 20. Rotary drive device; 21. Deflection shaft; 22. Swing arm; 23. Vertical partition; 24. Guide plate; 25. Sewage pump; 26. Sludge discharge pipe; 27. Flow stabilizing partition; 28. Adsorption module; 29. ​​Purified liquid discharge pipe; 30. Guide rail; 31. Adsorption purification chamber; 32. Sludge settling chamber; 33. Sealed end cap; 34. Operating handle; 35. Mesh basket; 36. Fixed frame. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In one embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 8 An adsorption-type heavy metal contaminated soil treatment device includes a treatment chamber 1, which is a hollow structure. A filter plate 7 with multiple evenly distributed filter holes is installed on the top of the treatment chamber 1. A grouting mechanism 6 is located at the rear of the treatment chamber 1. The grouting mechanism 6 mixes and stirs the soil with leachate to form a uniform slurry, and then conveys the stirred slurry above the filter plate 7. Water in the slurry is filtered through the filter plate 7 and enters the treatment chamber 1 for further treatment, while solid soil components are retained on the surface of the filter plate 7. An adsorption module 28 for adsorbing heavy metals is installed inside the treatment chamber 1 to deeply purify the filtered liquid.

[0028] A transverse fixing beam 13 is installed on both the front and rear sides of the processing chamber 1, and the transverse fixing beam 13 is horizontally arranged in the left-right direction. An extrusion plate 9 is respectively installed at both ends of the filter plate 7. A deflection drive assembly 11 is installed at both ends of the transverse fixing beam 13 to adjust the distance between the extrusion plate 9 and the surface of the filter plate 7. A scraper 8 is installed above the filter plate 7, and the scraper 8 can reciprocate left and right along the upper surface of the filter plate 7. A reciprocating transverse movement assembly 10 is installed in the middle of the transverse fixing beam 13 to drive the scraper 8 to move left and right and control the scraper 8 to press tightly against the extrusion plate 9. When the scraper 8 presses tightly against the extrusion plate 9, the slurry above the filter plate 7 is squeezed and dehydrated, and the soil is compacted into blocks; then the deflection drive assembly 11 drives the extrusion plate 9 away from the filter plate 7, and the scraper 8 continues to push the soil blocks out of the filter plate 7. The soil blocks fall off the filter plate 7 under gravity, achieving automatic discharge.

[0029] In one instance of this embodiment, please refer to Figure 7 The filter plate 7 is an arc-shaped structure recessed towards the interior of the treatment chamber 1, with baffles 12 vertically installed on both sides to prevent sludge from overflowing. The filter plate 7 and the baffles 12 together form a container structure with an open top, ensuring that the sludge has sufficient retention time on the filter plate 7 to complete effective filtration.

[0030] In one instance of this embodiment, please refer to Figure 3 , Figure 4 and Figure 5The reciprocating lateral movement assembly 10 includes a vertical mounting plate 18 fixedly installed in the middle of the front transverse fixed beam 13. The vertical mounting plate 18 is located on the front side to avoid interference with the rear grouting mechanism 6. The upper end of the vertical mounting plate 18 is rotatably connected to the front end of a deflection shaft 21 arranged in the front-rear direction, the rear end of the deflection shaft 21 is fixedly connected to the upper end of a swing arm 22, and the lower end of the swing arm 22 is fixedly connected to the middle of the scraper 8. A motor mounting base 19 is provided on the front side of the vertical mounting plate 18, on which a rotary drive device 20 is mounted. This device includes a drive motor that drives the deflection shaft 21 to deflect left and right through a belt transmission mechanism. The drive motor adopts a constant power control mode to ensure that the scraper 8 and the extrusion plate 9 perform constant pressure extrusion on the soil.

[0031] In one instance of this embodiment, please refer to Figure 3 , Figure 4 and Figure 6 The deflection drive assembly 11 includes a fixed frame 36 fixed to the end of the transverse fixed beam 13. Support shafts 14 are respectively installed at the front and rear positions on the left and right sides of the fixed frame 36, and these support shafts 14 are rotatably connected to the middle of the deflection plate 15. The lower end of the deflection plate 15 is inclined towards the center of the processing chamber 1, and its end is fixedly connected to the upper end of the extrusion plate 9. A thrust rod 16 is fixedly connected to the upper end of the deflection plate 15 in a front-rear direction. Ejection cylinders 17 are installed at both ends of the fixed frame 36. The base of the ejection cylinder 17 is rotatably connected to the fixed frame 36, and the end of its piston rod is rotatably connected to the middle of the thrust rod 16. When the piston rod of the ejection cylinder 17 retracts, it drives the extrusion plate 9 to move towards the filter plate 7 and presses the filter plate 7; when the scraper 8 moves to the end of the filter plate 7, it cooperates with the extrusion plate 9 to complete soil extrusion and dewatering. When the piston rod extends, the extrusion plate 9 moves away from the filter plate 7, and the scraper 8 pushes the formed soil block away from the filter plate 7, completing the discharge operation.

[0032] In one instance of this embodiment, please refer to Figure 7 , Figure 8 and Figure 9 A vertical partition 23 is provided in the middle of the treatment chamber 1. The lower end of the vertical partition 23 is connected to the bottom of the treatment chamber 1, and the upper end of the vertical partition 23 divides the interior of the treatment chamber 1 into a mud settling chamber 32 on the left and an adsorption purification chamber 31 on the right. A guide plate 24 is installed at the top inside the treatment chamber 1. The right end of the guide plate 24 is fixedly connected to the upper part of the right side wall of the treatment chamber 1, and the left end extends downward at an angle to above the mud settling chamber 32. Liquid dripping from the filter plate 7 falls onto the guide plate 24 and slides down its slope into the mud settling chamber 32. The lower edge of the guide plate 24 is higher than the upper edge of the vertical partition 23, so that when the liquid level in the mud settling chamber 32 exceeds the height of the vertical partition 23, the liquid can overflow into the adsorption purification chamber 31.

[0033] A flow-stabilizing baffle 27 is installed inside the sludge settling chamber 32. The flow-stabilizing baffle 27 is located between the left side wall of the treatment chamber 1 and the vertical baffle 23, and its upper end is fixedly connected to the left side of the lower surface of the guide plate 24. After the liquid flows along the guide plate 24 to the area between the left side wall of the treatment chamber 1 and the flow-stabilizing baffle 27, it flows through the gap between the bottom of the flow-stabilizing baffle 27 and the bottom of the treatment chamber 1 to the area between the flow-stabilizing baffle 27 and the vertical baffle 23. During this flow, the soil particles entrained in the liquid gradually settle to the bottom of the treatment chamber 1. A sludge discharge pipe 26 is connected to the lower part of the left side wall of the treatment chamber 1. A sewage pump 25 is installed on this pipe to periodically remove the deposited soil particles.

[0034] The adsorption purification chamber 31 is equipped with multiple parallel guide rails 30, which are mounted on the vertical partition 23 and the right side wall of the treatment chamber 1. Adsorption modules 28 are slidably mounted on the guide rails 30, and modules with different adsorption materials can be selected according to the treatment requirements. A purification liquid discharge pipe 29 is provided at the lower part of the right side wall of the treatment chamber 1 for discharging the treated liquid that meets the standards. The adsorption module 28 includes a mesh basket 35 with water-permeable holes on its side wall, and is filled with activated carbon, ion exchange resin, or special adsorption material. The front opening of the mesh basket 35 is connected to a detachable sealing end cap 33 by an interference fit, and an operating handle 34 is provided on the outer end of the sealing end cap 33. A clearance groove is provided at a corresponding position on the front side of the treatment chamber 1. When the adsorption module 28 is inserted along the guide rail 30, the sealing end cap 33 is exposed in the treatment chamber 1, allowing the adsorption module 28 to be replaced without stopping the machine.

[0035] In one instance of this embodiment, please refer to Figure 1 and Figure 2 The grouting mechanism 6 includes a mixing tank 2 vertically positioned behind the treatment chamber 1. The mixing tank 2 has an open top and an internal stirring device 4. A feed pump 3 is connected to the bottom outlet of the mixing tank 2, and the outlet of the feed pump 3 is connected to the middle of the rear baffle 12 via a conveying pipe 5. After the soil and leachate are mixed into a slurry by the stirring device 4 inside the mixing tank 2, the slurry is pumped by the feed pump 3 through the conveying pipe 5 to the top of the filter plate 7, completing the continuous material conveying.

[0036] The workflow of this equipment can be divided into three main stages: continuous feeding and preliminary filtration, mechanical dewatering and slag discharge, and liquid purification.

[0037] 1. Continuous feeding and preliminary filtration The equipment is started, and the heavy metal contaminated soil to be treated and an appropriate amount of leachate are continuously fed into the mixing tank 2, where they are mixed into a uniform slurry by the stirring device 4. The feed pump 3 continuously transports the slurry to the filter plate 7 through the conveying pipe 5. Under the action of gravity, the slurry undergoes preliminary filtration. Most of the liquid components, "containing dissolved heavy metals," pass through the holes of the filter plate 7 and enter the interior of the treatment chamber 1, while solid soil particles are trapped on the surface of the filter plate 7.

[0038] 2. Mechanical dewatering and slag removal The reciprocating lateral movement component 10 drives the scraper 8 to reciprocate on the surface of the filter plate 7. Taking the scraper 8 moving to the left as an example, it pushes the trapped soil to the left. When it moves to the left end, the scraper 8 and the left-side extrusion plate 9, which is pressed against the surface of the filter plate 7 by the deflection drive component 11, work together to extrude soil. During this process, the rotary drive device 20 uses constant power control to achieve constant pressure extrusion and dewatering of the soil, further squeezing out residual heavy metal-containing liquid. When the system detects that the extrusion pressure has reached a preset threshold, indicating that dewatering is complete, the left-side ejector cylinder 17 is activated, driving the extrusion plate 9 to lift. The scraper 8 then pushes the extruded soil away from the filter plate 7, allowing it to fall under gravity, completing the left-side slag discharge. Afterward, the scraper 8 moves to the right, repeating the above extrusion, dewatering, and slag discharge process with the right-side extrusion plate 9. This cycle repeats continuously, achieving continuous dewatering of the slurry and alternating discharge of solid residues.

[0039] 3. Liquid path purification Liquid filtered from filter plate 7 drips onto guide plate 24 and flows along its slope into sludge settling chamber 32. As the liquid flows through the channel formed by flow stabilizing baffle 27 and the bottom of treatment chamber 1, the flow velocity decreases, allowing entrained fine particles to settle. The clarified supernatant overflows the top of vertical baffle 23 and enters adsorption purification chamber 31. As the liquid flows downwards through multiple adsorption modules 28 filled with adsorbent, heavy metal ions are efficiently adsorbed and removed. Finally, the purified liquid is discharged through purification liquid discharge pipe 29, and can be recycled or discharged in compliance with standards. Sludge deposited at the bottom of sludge settling chamber 32 can be periodically discharged through sludge discharge pipe 26 and sewage pump 25. When adsorption module 28 becomes saturated, the operator can pull it out from outside treatment chamber 1 using operating handle 34, replace the adsorbent, and reinsert it, achieving maintenance without shutting down the system.

[0040] This invention provides an adsorption-type heavy metal contaminated soil treatment device. Through the continuous feeding of the grouting mechanism 6 and the synergistic effect of the alternating dewatering and slag discharge mechanism of the scraper 8 and the extrusion plate 9, continuous operation of soil treatment is achieved, significantly improving treatment efficiency and equipment utilization. The extrusion dewatering technology can fully separate the heavy metal contaminated liquid in the soil, while the subsequent slurry settling chamber 32 effectively removes suspended particles in the liquid through deep settling, which not only ensures the purity of solid-liquid separation, but also reduces the load on the adsorption module 28, avoids the risk of blockage, and ensures the efficiency and stability of the adsorption process. In addition, the adsorption module 28 adopts a sliding installation of guide rail 30 and an external quick-release design, which supports the replacement and maintenance of adsorbent without stopping the machine. It is not only convenient to operate and has low operation and maintenance costs, but also gives the equipment the flexible treatment capability to adapt to different types of heavy metal pollution. Overall, it achieves an organic unity of high efficiency, stability and convenient operation and maintenance.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An adsorption-type heavy metal contaminated soil treatment device, comprising a treatment chamber, a filter plate at the top of the treatment chamber, a grouting mechanism on the outside of the treatment chamber for injecting a mixture of soil and leachate into the filter plate, and an adsorption module for adsorbing heavy metals inside the treatment chamber, characterized in that, A transverse fixing beam is fixed to the side of the processing chamber. Movable extrusion plates are provided at both ends of the filter plate. A deflection drive assembly for adjusting the distance between the extrusion plate and the filter plate is provided at both ends of the transverse fixing beam. A scraper is provided above the filter plate. A reciprocating transverse moving assembly is provided in the middle of the transverse fixing beam for driving the scraper to move reciprocally along the surface of the filter plate and for the scraper to alternately press against the extrusion plates on both sides during the movement.

2. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 1, characterized in that, The filter plate is an arc-shaped structure that is recessed towards the inside of the processing chamber, and baffles are provided on both sides of the filter plate to prevent mud overflow.

3. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 2, characterized in that, The reciprocating lateral movement assembly includes a vertical mounting plate fixedly installed in the middle of the transverse fixed beam. A deflection shaft is rotatably connected to the end of the vertical mounting plate. One end of the deflection shaft near the middle of the processing chamber is fixedly connected to one end of a swing arm. The other end of the swing arm is fixedly connected to the middle of the scraper. A motor mounting base is provided on the side of the vertical mounting plate. A rotary drive device for driving the deflection shaft to rotate is provided on the motor mounting base.

4. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 3, characterized in that, The deflection drive assembly includes a fixed frame disposed at the end of a transverse fixed beam. A support shaft is disposed on the side of the fixed frame. The support shaft is rotatably connected to the middle of a deflection plate. One end of the deflection plate is fixedly connected to a pressing plate, and the other end of the deflection plate is fixedly connected to the end of a thrust rod. The middle of the fixed frame is rotatably connected to an ejector cylinder, and the end of the piston rod of the ejector cylinder is rotatably connected to the middle of the thrust rod.

5. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 1, characterized in that, A vertical partition is provided in the middle of the treatment chamber, which divides the interior of the treatment chamber into a slurry settling chamber and an adsorption purification chamber. A guide plate is provided on the inner wall of the treatment chamber on one side of the adsorption purification chamber. The guide plate extends from the inner wall of the treatment chamber into the slurry settling chamber and is inclined towards the bottom of the slurry settling chamber. The lower edge of the guide plate is higher than the top edge of the vertical partition.

6. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 5, characterized in that, A flow stabilizing baffle is installed in the slurry settling chamber. The flow stabilizing baffle is located below the guide plate, and the bottom of the flow stabilizing baffle is lower than the top of the vertical baffle. A sludge discharge pipe is installed on the bottom side wall of the treatment chamber corresponding to the slurry settling chamber. A sewage pump is connected to the sludge discharge pipe.

7. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 5, characterized in that, The adsorption purification chamber has multiple parallel guide rails inside, which are set on the vertical partition and the inner wall of the treatment chamber. The adsorption module is slidably installed on the guide rails, and the treatment chamber is provided with a purification liquid discharge pipe corresponding to the bottom side wall of the adsorption purification chamber.

8. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 7, characterized in that, The adsorption module includes a mesh basket with a detachable sealing end cap at one side opening. The sealing end cap has an operating handle. When the adsorption module is pushed into the adsorption purification chamber along the guide rail, the sealing end cap is located outside the treatment chamber.

9. The adsorption-type heavy metal contaminated soil treatment equipment according to claim 1, characterized in that, The grouting mechanism includes a mixing tank, inside which is a stirring device for mixing soil and leachate into a uniform slurry. A feed pump is connected to the bottom outlet of the mixing tank, and the output end of the feed pump is connected to a conveying pipe. The outlet of the conveying pipe leads to the top of the filter plate.

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