A heavy metal contaminated soil elution and repair device and repair method
By setting up a vibration component and a crushing component in the feed hopper, the problems of safety and low efficiency of manual soil turning operations are solved, the contaminated soil is automatically crushed, the efficiency of mud and stone separation and slurry making is improved, and the uniformity of soil treatment and resource utilization are enhanced.
Patent Information
- Application Number
- CN202510057907.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2045-01-14
AI Technical Summary
In the existing technology, manual soil turning operations in mud-rock separation and slurry making systems pose safety risks, high labor intensity, low efficiency and poor consistency, which affect the uniformity of contaminated soil pretreatment and subsequent remediation effects.
A vibration component and a crushing component are set in the feed hopper. The vibration component prevents soil accumulation, and the crushing component automatically crushes large pieces of contaminated soil. It includes components such as a grid, a vibration frame, a top rod, an extension rod, a lower crushing rod and an upper crushing rod, and is driven by a servo motor to achieve automatic crushing.
It improves worker safety and operational efficiency, the crushed soil has smaller particle size, enhances the efficiency of mud-rock separation and slurry making, and improves the treatment efficiency of contaminated soil and the degree of resource recycling.
Smart Images
Figure CN119819701B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of soil remediation, and in particular to an elution and remediation device for heavy metal contaminated soil and a remediation method thereof. Background Art
[0002] Ex situ soil elution technology is one of the most commonly used technologies for the remediation of heavy metal contaminated soil. Its core lies in using water or other eluents to wash away pollutants on the surface of soil particles, thereby transferring pollutants from solid soil particles to the liquid phase, achieving soil purification and reduction of contaminated soil. Ex situ soil elution technology can achieve rapid and efficient remediation of contaminated soil with low remediation cost and short time. The ex situ soil elution treatment system generally includes a mud and stone separation slurry making system, a particle size classification chemical synergistic elution system, a mud and water separation system, a wastewater treatment and electronic control system, etc., which can comprehensively treat contaminated soil.
[0003] At present, in the mud and rock separation pulping system on the market, when encountering harder and stickier contaminated soil, manual soil turning is relied on on one side of the feed hopper to destroy the bulk structure of the soil and prevent the soil in the feed hopper from being blocked, thereby improving the pulping efficiency. However, there is a certain risk for workers to turn the soil while standing on such large equipment. When turning the soil manually, workers are in direct contact with the contaminated soil, which poses a health risk and may cause damage to the workers' physical health. In addition, manual soil turning is a labor-intensive job that consumes a lot of physical energy for workers. Long-term operation may cause fatigue to workers, affecting work quality and safety. Moreover, the consistency of manual operation is poor, which may lead to insufficient uniformity and consistency of soil pretreatment, affecting the effectiveness of subsequent leaching and other remediation processes. Therefore, based on the above problems, the present invention provides a heavy metal contaminated soil elution and remediation method thereof to meet the needs. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a heavy metal contaminated soil elution and repair equipment and a repair method thereof by setting a vibration component and a crushing component, which are respectively arranged at the top and bottom of the inner wall of the feed hopper. The vibration component can not only replace manpower and improve the health and safety of workers, but also can use the vibration component to dredge the contaminated soil during the feeding process of the feed hopper, thereby preventing the contaminated soil from being blocked; the crushing component is not only suitable for processing hard soil and clay soil, and quickly crushing the contaminated soil, but also can automatically fragment large pieces of harder and stickier contaminated soil. The crushed soil has a smaller particle size, which is more conducive to the subsequent mud and stone slurry making and separation process, thereby improving the treatment efficiency of contaminated soil and the degree of resource reuse. The above setting can solve the problem of relying on manpower to shovel contaminated soil in the mud and stone separation slurry making system in the current market, which leads to danger and low efficiency.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:
[0006] A heavy metal contaminated soil elution and remediation device and remediation method thereof, comprising a feed hopper, the top of which is fixedly connected to a vibration component, the vibration component being used to prevent the contaminated soil from accumulating, the vibration component being connected to the feed hopper; and a crushing component being used to assist in further fragmenting the contaminated soil, the crushing component being connected to the feed hopper.
[0007] Optionally, the vibration assembly includes a grille fixedly connected to the top of the feed hopper, a vibration frame is slidably connected to the grille, a top rod is fixedly connected to the top of the vibration frame, and an extension rod is fixedly connected to the bottom of the vibration frame.
[0008] Optionally, the vibration frame is a round rod with S-shaped movement, and the vibration frame is arranged to cross the horizontal and vertical lines of the grille.
[0009] Optionally, the grille is an orthogonal grid structure, a groove is provided at the top of the grille corresponding to the position of the vibration frame, and the top of the groove has an outward curvature.
[0010] Optionally, the positions of the top rod and the groove correspond one to one, the inner wall size of the groove matches the outer contour size of the top rod, and the top of the top rod is flush with the top of the grille.
[0011] Optionally, the bottom of the extension rod is a C-shaped profile structure, and the vibration frame, the top rod and the extension rod are an integrally manufactured structure.
[0012] Optionally, the breaking assembly includes a lower breaking rod and an upper breaking rod fixedly connected to the bottom of the inner wall of the feed hopper, the lower breaking rod and the upper breaking rod are arranged alternately, and the lower breaking rod and the upper breaking rod are connected by a spring, and the top of the inner wall of the feed hopper is fixedly connected with evenly distributed inclined rods, and the free ends of the inclined rods extend to the top of the lower breaking rods.
[0013] Optionally, the oblique rods are elastic structures, each group of the oblique rods consists of two long rods and one short rod, the distance between the two long rods in the same group gradually decreases from top to bottom, and the short rod is fixedly connected at the center of the two long rods.
[0014] Optionally, the top of the lower breaking rod has a downward curvature, the bottom of the lower breaking rod is fixedly connected to a lower connecting rod, the side of the lower connecting rod is fixedly connected to a rotating shaft through an arc rod, one side of the rotating shaft is fixedly connected to a servo motor, and the lower breaking rod is provided with a refined portion at a position corresponding to the extension rod, and the outer contour size of the refined portion is smaller than the outer contour size of the bottom of the extension rod.
[0015] Optionally, the top of the upper breaking rod has a downward curvature, the middle of the upper breaking rod is fixedly connected to a cross rod, the cross rod is connected to the arc rod via the spring, and the position of the spring corresponds to the position of the thinning portion.
[0016] Compared with the prior art, the present invention has at least the following beneficial effects:
[0017] In the above scheme, a vibration component and a crushing component are provided, and the vibration component and the crushing component are respectively provided at the top and bottom of the inner wall of the feed hopper. The vibration component can not only replace manpower and improve the health and safety of workers, but also can use the vibration component to dredge the contaminated soil during the feeding process of the feed hopper, thereby preventing the contaminated soil from being blocked; the crushing component is not only suitable for processing hard soil and clay soil, and quickly crushing the contaminated soil, but also can increase the surface area of the soil through crushing, making the separation of soil and stone more thorough, and can automatically crush large pieces of harder and stickier contaminated soil into pieces. The crushed soil has smaller particle size, which is more conducive to the subsequent mud and stone slurry making and separation process, thereby improving the degree of soil crushing, and then improving the treatment efficiency of contaminated soil and the degree of resource recycling.
[0018] By setting an inclined rod, a force sensor, a lower connecting rod and a servo motor, the free end of the inclined rod extends above the force sensor. During the falling of the contaminated soil, the soil's own weight is used to press the free end of the inclined rod down to the contact force sensor, triggering the servo motor to work. The servo motor drives the lower breaking rod to perform reciprocating rotation through the rotating shaft. The lower breaking rod and the upper breaking rod are arranged alternately, and the movement of the lower breaking rod is used to achieve continuous breaking of large pieces of contaminated soil. In addition, the inclined rod is gradually sparsely arranged from top to bottom. In order to concentrate large pieces of soil above the free end of the inclined rod, it is ensured that the lower breaking rod and the upper breaking rod can successfully complete the breaking work, and the large pieces of soil are screened to ensure that the contaminated soil is fully fragmented, thereby improving the efficiency of mud and stone separation and the fluidity of slurry.
[0019] By arranging the vibration frame, the top rod and the groove, the inner contour of the groove is consistent with the outer contour size of the top rod and the vibration frame, and the wide openings on both sides of the top of the groove are set to facilitate the vibration frame and the top rod to slide into the corresponding groove, while reducing material blockage, so that the material can pass through the grille more smoothly. The S-shaped movement setting of the vibration frame on the grille ensures the uniform distribution of the top rod and the hidden setting of the top rod. Such a structural setting retains the integrity of the grille and the uniform distribution of the vibration effect to the greatest extent, effectively improving the feeding efficiency of contaminated soil.
[0020] By arranging a refinement portion and an extension rod, a refinement portion is opened at a position of the lower breaker rod corresponding to the extension rod to cooperate with the extension rod, so that the lower breaker rod can provide upward power support to the extension rod during the upward flipping process, so that the reciprocating rotation of the lower breaker rod drives the vibration frame and the top rod to move up and down, thereby achieving the effect of vibrating the contaminated soil. The outer contour size of the refinement portion is adapted to the C-shaped contour of the bottom of the extension rod, ensuring that the refinement portion can smoothly transmit upward power to the extension rod. In addition, the extension rod, vibration frame and top rod are an integrated manufacturing structure. Such a setting makes the processing technology of the three simpler during the production process, easier to produce, and reduces the manufacturer's capital investment.
[0021] By setting a cross bar, an upper connecting rod and a servo motor, the servo motor is used to ensure that the lower breaking rod performs reciprocating rotation within a limited angle. When the lower breaking rod rotates upward until it contacts the cross bar, the lower breaking rod starts to rotate downward. When the lower breaking rod rotates downward until it contacts the upper connecting rod, the lower breaking rod starts to rotate upward, thereby achieving continuous breaking of the contaminated soil between the lower breaking rod and the upper breaking rod. In addition, the lowest point of the free end of the lower breaking rod extends to below the bottom of the feed hopper. In the process of the lower breaking rod flipping up and down, the bottom of the feed hopper is also dredged to prevent material blockage when there is too much material, thereby improving feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention, thereby enabling those skilled in the art to make and use the invention.
[0023] Figure 1 This is a side view schematic diagram of the structure of the elution and remediation equipment for heavy metal contaminated soil;
[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the elution and remediation equipment for heavy metal contaminated soil;
[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the feed hopper;
[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the feed hopper;
[0027] Figure 5 This is a schematic diagram of the top view of the broken component;
[0028] Figure 6 This is an enlarged three-dimensional structural diagram of the upper and lower breaking rods;
[0029] Figure 7 An enlarged schematic diagram of the three-dimensional structure for the broken components and the vibrating components;
[0030] Figure 8 for Figure 7 A in the middle is an enlarged schematic diagram of the three-dimensional structure;
[0031] Figure 9 It is a schematic diagram of the enlarged three-dimensional structure of the vibration component;
[0032] Figure 10 for Figure 9 The enlarged schematic diagram of the three-dimensional structure at point B in the middle.
[0033] Reference numerals:
[0034] 1. Feed hopper; 2. Grille; 201. Vibrating frame; 202. Push rod; 203. Extension rod; 204. Groove; 3. Inclined rod; 4. Lower crushing rod; 401. Refining unit; 402. Lower connecting rod; 403. Rotating shaft; 404. Force sensor; 405. Servo motor; 5. Upper crushing rod; 501. Cross bar; 502. Upper connecting rod; 6. Spring; 7. Dosing conveyor; 8. Loading conveyor; 9. Drum stone washer.
[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION
[0036] The following describes in detail, with reference to the accompanying drawings and specific examples, a heavy metal-contaminated soil elution and remediation device and remediation method provided by the present invention. It is also noted that, for the sake of completeness, the following examples are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.
[0037] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).
[0038] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.
[0039] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.
[0040] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.
[0041] like Figures 1 to 10 As shown, an embodiment of the present invention provides a heavy metal contaminated soil elution and remediation device and a remediation method thereof, including a feed hopper 1, a vibration component fixedly connected to the top of the feed hopper 1, the vibration component is used to prevent the contaminated soil from accumulating, and the vibration component is connected to the feed hopper 1; a crushing component, the crushing component is used to assist the contaminated soil in becoming more fragmented, and the crushing component is connected to the feed hopper 1. The heavy metal contaminated soil elution and remediation device provided in this application is suitable for the processing flow of contaminated soil in the feed hopper 1 during the mud and stone separation and pulping system. Before entering the feed hopper 1, the contaminated soil needs to pass through the grille 2, and then be screened by the inclined rod 3. Finally, the large pieces of material are screened out and then crushed by the lower crushing rod 4 and the upper crushing rod 5. The grille 2 can perform preliminary screening of the material and screen large-volume materials to avoid excessive material being put into the feed hopper 1 together to affect the processing efficiency. In this application, the grille 2 is set on the feed hopper 1 and the working principle of the grille 2 is disclosed as the prior art, so no further details will be given.
[0042] By setting a vibration component and a crushing component, the vibration component and the crushing component are respectively arranged at the top and bottom of the inner wall of the feed hopper 1. The vibration component can not only replace manpower and improve the health and safety of workers, but also can use the vibration component to dredge the contaminated soil during the loading process of the feed hopper 1, thereby preventing the contaminated soil from being blocked; the crushing component is not only suitable for processing hard soil and clay soil, and quickly crushing the contaminated soil, but also can increase the surface area of the soil through crushing, making the separation of soil and stone more thorough, and can automatically crush large pieces of hard and sticky contaminated soil into pieces. The crushed soil has a smaller particle size, which is more conducive to the subsequent mud and stone slurry making and separation process, thereby improving the crushing degree of the soil, and then improving the treatment efficiency of the contaminated soil and the degree of resource recycling.
[0043] As an implementation method in this embodiment, Figures 2 to 4 As shown, the vibration assembly includes a grille 2 fixedly connected to the top of the feed hopper 1, a vibration frame 201 is slidably connected to the grille 2, a top rod 202 is fixedly connected to the top of the vibration frame 201, and an extension rod 203 is fixedly connected to the bottom of the vibration frame 201. The vibration frame 201 is a round rod with an S-shaped movement, as shown in FIG. Figure 7 and Figure 9 The vibration frame 201 and the horizontal and vertical lines of the grid 2 are arranged to intersect, and the grid 2 is an orthogonal grid structure, such as Figure 3 and Figure 9 The top of the grid 2 corresponds to the position of the vibration frame 201 is provided with a groove 204, the top of the groove 204 has an outward curvature, the top rod 202 and the groove 204 position one-to-one correspondence, such as Figure 10As shown; the inner wall size of the groove 204 is consistent with the outer contour size of the top rod 202, the top of the top rod 202 is flush with the top of the grille 2, the vibration frame 201 and the top rod 202 slide up and down inside the groove 204, the vibration frame 201 is cross-set at the center of each grid 2 to ensure the uniformity of the setting of the top rod 202, the vibration frame 201 and the top rod 202 are both round rods, which are convenient for the contaminated soil to slide down, the top of the top rod 202 is flush with the top of the grille 2, and the vibration frame 201 is fixedly connected to the bottom of the top rod 202, so that when the vibration frame 201 moves upward, it drives the top rod 202 to protrude from the grille 2 and move upward together, thereby clearing the contaminated soil accumulated at the feed inlet To clear the dirt, a vibration frame 201, a top rod 202 and a groove 204 are arranged in coordination. The inner contour of the groove 204 matches the outer contour size of the top rod 202 and the vibration frame 201, and the top two sides of the groove 204 are wide-mouthed, which facilitates the vibration frame 201 and the top rod 202 to slide into the corresponding groove 204 while reducing material blockage, so that the material can pass through the grille 2 more smoothly. The S-shaped movement setting of the vibration frame 201 on the grille 2 ensures the uniform distribution of the top rod 202 and the hidden setting of the top rod 202. Such a structural setting retains the integrity of the grille 2 and the uniform distribution of the vibration effect to the greatest extent, effectively improving the feeding efficiency of the contaminated soil.
[0044] Furthermore, the bottom of the extension rod 203 is a C-shaped profile structure, the vibration frame 201, the top rod 202 and the extension rod 203 are an integrated manufacturing structure, and the lower breaking rod 4 is provided with a thinning portion 401 at a position corresponding to the extension rod 203. The outer contour size of the thinning portion 401 is smaller than the outer contour size of the bottom of the extension rod 203 (such as Figure 7 and Figure 8As shown), the thinning portion 401 is clamped by a C-shaped profile to ensure that the extension rod 203 can only slide within the area of the thinning portion 401, ensuring that the lower breaking rod 4 drives the extension rod 203 to move upward smoothly. The length of the thinning portion 401 is greater than the length of the trajectory of the lower breaking rod 4 driving the extension rod 203 to move upward, ensuring that the extension rod 203 can smoothly cooperate with the thinning portion 401. The vibration frame 201, the top rod 202 and the extension rod 203 are an integrated manufacturing structure, which also ensures the stability and durability of the overall structural frame. By arranging the thinning portion 401 and the extension rod 203, a thinning portion 401 and an extension rod 203 are opened at the position of the lower breaking rod 4 corresponding to the extension rod 203. 203 cooperates so that the lower breaking rod 4 can provide upward power support to the extension rod 203 during the upward flipping process, so that the reciprocating rotation of the lower breaking rod 4 drives the vibration frame 201 and the top rod 202 to move up and down, achieving the effect of vibrating the contaminated soil. The outer contour size of the refinement part 401 is adapted to the C-shaped contour at the bottom of the extension rod 203, ensuring that the refinement part 401 can smoothly transmit upward power to the extension rod 203. In addition, the extension rod 203, the vibration frame 201 and the top rod 202 are an integrated manufacturing structure. This setting makes the processing technology of the three simpler during the production process, easier to produce, and reduces the manufacturer's capital investment.
[0045] As an implementation method in this embodiment, Figures 4 to 7As shown, the crushing assembly includes a lower crushing rod 4 and an upper crushing rod 5 fixedly connected to the bottom of the inner wall of the feed hopper 1. The lower crushing rod 4 and the upper crushing rod 5 are arranged in an alternating manner, and the lower crushing rod 4 and the upper crushing rod 5 are connected by a spring 6. The top of the inner wall of the feed hopper 1 is fixedly connected with an evenly distributed inclined rod 3, and the free end of the inclined rod 3 extends to the top of the lower crushing rod 4. The inclined rod 3 is an elastic structure. Each group of inclined rods 3 consists of two long rods and a short rod. The spacing between the two long rods in the same group gradually decreases from top to bottom. The short rod is fixedly connected at the center of the two long rods. The purpose of the inclined rod 3 is to screen out large pieces of soil that need secondary crushing and rely on the dead weight of the large pieces of soil to press the free end of the inclined rod 3 to trigger the force sensor 404, thereby starting the work of the servo motor 405. The servo motor 405 drives the lower crushing rod 4 to flip up and down, thereby realizing secondary crushing of large pieces of soil. The working of the force sensor 404 and the servo motor 405 The working principle is disclosed as a prior art and therefore will not be described in detail. By setting an inclined rod 3, a force sensor 404, a lower connecting rod 402 and a servo motor 405, the free end of the inclined rod 3 extends to the top of the force sensor 404. During the falling of the contaminated soil, the free end of the inclined rod 3 is pressed down to the contact force sensor 404 by utilizing the dead weight of the soil, triggering the servo motor 405 to work, and the servo motor 405 drives the lower breaking rod 4 to rotate back and forth through the rotating shaft 403. The lower breaking rod 4 and the upper breaking rod 5 are arranged alternately, and the movement of the lower breaking rod 4 is utilized to realize the continuous breaking of large pieces of contaminated soil. In addition, the inclined rod 3 is gradually sparsely arranged from top to bottom, in order to concentrate large pieces of soil above the free end of the inclined rod 3, to ensure that the lower breaking rod 4 and the upper breaking rod 5 can successfully complete the breaking work, screen the large pieces of soil, and ensure that the contaminated soil is fully fragmented, thereby improving the efficiency of mud and stone separation and the fluidity of slurry.
[0046] In this embodiment, if Figures 4 to 6As shown, the top of the lower breaking rod 4 has a downward curvature, the bottom of the lower breaking rod 4 is fixedly connected to the lower connecting rod 402, the side of the lower connecting rod 402 is fixedly connected to the rotating shaft 403 through an arc rod, and one side of the rotating shaft 403 is fixedly connected to the servo motor 405. The top of the upper breaking rod 5 has a downward curvature, and the middle part of the upper breaking rod 5 is fixedly connected to the cross bar 501. The cross bar 501 and the arc rod are connected by a spring 6. The position of the spring 6 corresponds to the position of the thinning part 401. The top of the lower breaking rod 4 has a downward curvature, which is convenient for achieving staggered crushing with the upper breaking rod 5 through a smaller rotation angle. The working principle of the upper breaking rod 5 and the lower breaking rod 4 connected by the spring 6 is disclosed in the prior art and is therefore not described in detail. The extension rod 203 and the thinning part The positions of 401 and the spring 6 correspond to each other, ensuring the stability of the overall structure. By arranging the cross bar 501, the upper connecting rod 502 and the servo motor 405, the servo motor 405 is used to ensure that the lower breaking rod 4 performs reciprocating rotation within a limited angle. When the lower breaking rod 4 rotates upward until it contacts the cross bar 501, the lower breaking rod 4 starts to rotate downward. When the lower breaking rod 4 rotates downward until it contacts the upper connecting rod 502, the lower breaking rod 4 starts to rotate upward, thereby achieving continuous crushing of the contaminated soil between the lower breaking rod 4 and the upper breaking rod 5. In addition, the lowest point of the free end of the lower breaking rod 4 extends to below the bottom of the feed hopper 1. In the process of the lower breaking rod 4 turning up and down, the bottom of the feed hopper 1 is also dredged to prevent material blockage when there is too much material, thereby improving the feeding efficiency.
[0047] The workflow of the technical solution provided by the present invention is as follows:
[0048] During use, when using the ex situ leaching technology to repair the soil, the first step is to use the mud and stone separation slurry making system. First, the contaminated soil from the excavator is poured onto the feed hopper 1, and the contaminated soil is screened to remove large particles in preparation for subsequent leaching treatment. Before entering the feed hopper 1, the contaminated soil needs to pass through the grille 2, and then be screened by the inclined rod 3. Finally, the large pieces of material are screened out and then broken by the lower breaking rod 4 and the upper breaking rod 5. The grille 2 can perform preliminary screening of the material and screen large volumes of material to avoid too much material being put into the feed hopper 1 together, affecting the processing efficiency. The inclined rod 3 is gradually sparsely arranged from top to bottom. In order to concentrate the large pieces of soil above the free end of the inclined rod 3, the free end of the inclined rod 3 extends to the top of the force sensor 404.
[0049] During the falling of the contaminated soil, the weight of the soil is used to press the free end of the inclined rod 3 down to the contact force sensor 404, triggering the servo motor 405 to work, and the servo motor 405 drives the lower breaking rod 4 to perform reciprocating rotation through the rotating shaft 403. The lower breaking rod 4 and the upper breaking rod 5 are arranged alternately, and the movement of the lower breaking rod 4 is used to achieve continuous breaking of large pieces of contaminated soil. A refinement part 401 is provided at the position of the lower breaking rod 4 corresponding to the extension rod 203 to cooperate with the extension rod 203, so that the lower breaking rod 4 can provide upward power support to the extension rod 203 during the upward flipping process, so that the reciprocating rotation of the lower breaking rod 4 drives the vibration frame 201 and the top rod 202 to move up and down, achieving the effect of vibrating the contaminated soil. The outer contour size of the refinement part 401 is adapted to the C-shaped contour at the bottom of the extension rod 203, ensuring the refinement. Part 401 can smoothly transmit upward power to the extension rod 203, and the servo motor 405 is used to ensure that the lower breaking rod 4 performs reciprocating rotation within a limited angle. When the lower breaking rod 4 rotates upward until it contacts the cross bar 501, the lower breaking rod 4 starts to rotate downward. When the lower breaking rod 4 rotates downward until it contacts the upper connecting rod 502, the lower breaking rod 4 starts to rotate upward, thereby continuously breaking up the contaminated soil between the lower breaking rod 4 and the upper breaking rod 5. In addition, the lowest point of the free end of the lower breaking rod 4 extends to below the bottom of the feed hopper 1. In the process of the lower breaking rod 4 turning up and down, the bottom of the feed hopper 1 is also dredged to prevent material blockage when there is too much material, thereby improving the feeding efficiency. The screened soil is crushed through the above structural setting to increase the surface area of the soil particles and improve the elution efficiency.
[0050] After being processed by the feed hopper 1, the contaminated soil falls onto the metering conveyor 7 and is then transferred to the loading conveyor 8. Finally, it is transported to the drum stone washer 9 for mud and rock separation and slurry production. The second step is a particle size classification chemical synergistic leaching system. The mud and rock slurry produced by the drum stone washer 9 is screened by a high-frequency vibrating screen. Sand and gravel with a particle size greater than 0.3mm are discharged through a conveyor, and the remaining soil particles with a particle size less than 0.3mm enter the leaching tank with the mud. Then, a synergistic leaching treatment is carried out by adding a leaching agent in equal proportions obtained from pilot experiments. In the leaching tank, the leaching agent is used to perform chemical synergistic leaching on fine-grained soil according to the optimal process parameters determined by the pilot experiments. This step can effectively remove heavy metal pollutants in the soil. The third step is to carry out the mud-water separation system. The mud after synergistic elution is transported to the plate and frame filter press for mud-water separation. The wastewater generated by filtration enters the water treatment system, and the solid phase mud cake is piled up in the inspection area. The fourth step is wastewater treatment, which consists of a dosing system, an integrated water treatment machine and an activated carbon tank. The wastewater generated by filtration enters the integrated treatment machine for coagulation and sedimentation, and then enters the support pool after being filtered by the activated carbon tank. The wastewater that has been treated and is qualified can be recycled. The entire process needs to be completed in conjunction with the electronic control system. The working principles of the mud-water separation system, wastewater treatment and electronic control system of the ex situ elution technology are disclosed as existing technologies and therefore will not be elaborated on.
[0051] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.
[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A heavy metal contaminated soil elution and remediation device, comprising a feed hopper, characterized in that: A vibration assembly is fixedly connected to the top of the feed hopper, and the vibration assembly is used to prevent the accumulation of contaminated soil. The vibration assembly is connected to the feed hopper; A breaking component, which is used to help the contaminated soil break into smaller pieces, and is connected to the feed hopper; The breaking assembly includes a lower breaking rod and an upper breaking rod fixedly connected to the bottom of the inner wall of the feed hopper, the lower breaking rod and the upper breaking rod are arranged alternately, and the lower breaking rod and the upper breaking rod are connected by a spring. The top of the inner wall of the feed hopper is fixedly connected with evenly distributed inclined rods, and the free ends of the inclined rods extend to the top of the lower breaking rods; The bottom of the lower breaking rod is fixedly connected to a lower connecting rod, the side of the lower connecting rod is fixedly connected to a rotating shaft through an arc rod, and one side of the rotating shaft is fixedly connected to a servo motor; The middle part of the upper breaking rod is fixedly connected with a cross rod, and the upper breaking rod is provided with an upper connecting rod; When the lower breaker bar rotates upward to contact the cross bar, the lower breaker bar starts to rotate downward, and when the lower breaker bar rotates downward to contact the upper connecting rod, the lower breaker bar starts to rotate upward.
2. The heavy metal contaminated soil elution and remediation equipment according to claim 1, characterized in that: The vibration assembly includes a grille fixedly connected to the top of the feed hopper, a vibration frame slidably connected to the grille, a top rod fixedly connected to the top of the vibration frame, and an extension rod fixedly connected to the bottom of the vibration frame.
3. The heavy metal contaminated soil elution and remediation equipment according to claim 2, characterized in that: The vibration frame is a circular rod with an S-shaped movement, and the vibration frame is arranged to cross the horizontal and vertical lines of the grille.
4. The heavy metal contaminated soil elution and remediation equipment according to claim 2, characterized in that: The grille is an orthogonal grid structure. A groove is provided at the top of the grille corresponding to the position of the vibration frame. The top of the groove has an outward curvature.
5. The heavy metal contaminated soil elution and remediation equipment according to claim 4, characterized in that: The positions of the push rod and the groove correspond one to one, the inner wall size of the groove matches the outer contour size of the push rod, and the top of the push rod is flush with the top of the grille.
6. The heavy metal contaminated soil elution and remediation equipment according to claim 2, characterized in that: The bottom of the extension rod is a C-shaped profile structure, and the vibration frame, the top rod and the extension rod are an integrated manufacturing structure.
7. The heavy metal contaminated soil elution and remediation equipment according to claim 1, characterized in that: The oblique rods are elastic structures. Each group of the oblique rods consists of two long rods and one short rod. The distance between the two long rods in the same group gradually decreases from top to bottom. The short rod is fixedly connected at the center of the two long rods.
8. The heavy metal contaminated soil elution and remediation equipment according to claim 2, characterized in that: The top of the lower breaking rod has a downward curvature, and the lower breaking rod is provided with a thinning portion at a position corresponding to the extension rod, and the outer contour size of the thinning portion is smaller than the outer contour size of the bottom of the extension rod.
9. The heavy metal contaminated soil elution and remediation equipment according to claim 8, characterized in that: The top of the upper breaking rod has a downward curvature, the cross rod and the arc rod are connected via the spring, and the position of the spring corresponds to the position of the thinning portion.