Soil heavy metal pickling progress monitoring device

Abstract

The utility model relates to the technical field of soil pickling repair, in particular to a soil heavy metal pickling progress monitoring device which comprises a mixed pickling tank, a floating mechanism, a linkage mechanism and a display assembly, the floating mechanism is arranged in the mixed pickling tank in a floating mode, one end of the linkage mechanism is in transmission connection with the floating mechanism, and the other end of the linkage mechanism is in transmission connection with the display assembly. The other end of the linkage mechanism is connected with the display assembly so as to drive the display assembly to change. In the scheme, along with continuous proceeding of the pickling process, heavy metal ions in soil enter the mixed liquid, the density of the mixed liquid is gradually increased, and the floating mechanism can gradually rise along with increasing of the density of the mixed liquid. The floating mechanism rises to drive the linkage mechanism to move, so that the display assembly is driven to change, and the pickling progress can be visually judged by observing the change condition of the display assembly. And when the display assembly does not change any more, the density of the mixed liquid tends to be stable, namely, the end point of soil heavy metal acid pickling is reached.

Description

Technical Field

[0001] This utility model relates to the field of soil acid washing and remediation technology, and more specifically, to a monitoring device for the progress of soil heavy metal acid washing. Background Technology

[0002] Soil acid washing technology, one of the related technologies, involves mixing soil with chemical detergents to allow heavy metals in the soil to react chemically with the acidic solution and dissolve into the acidic solution. The soil and the mixed solution are then separated to achieve soil remediation.

[0003] In current soil acid washing technologies, determining the endpoint of acid washing largely relies on accumulated experience. Experimental methods are also used, such as extracting samples during soil acid washing for solid-liquid separation, testing the separated acid solution for various heavy metal contents, and then repeating the acid washing and sampling testing process. These methods are time-consuming, labor-intensive, and require frequent testing to determine the endpoint, resulting in low efficiency. Utility Model Content

[0004] To overcome the problem that the progress of soil heavy metal leaching is not easy to monitor in the prior art, this utility model provides a monitoring device for the progress of soil heavy metal leaching, so as to intuitively judge the progress of soil heavy metal leaching.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a monitoring device for the progress of soil heavy metal acid washing, including a mixed acid washing tank, a floating mechanism, a linkage mechanism and a display component. The floating mechanism is floating in the mixed acid washing tank. One end of the linkage mechanism is connected to the floating mechanism for transmission, and the other end of the linkage mechanism is connected to the display component to drive the display component to change.

[0006] In this invention, a mixed acid washing tank is used for acid washing of heavy metals in soil, and a float mechanism floats in the mixed solution of the tank. As the acid washing process continues, heavy metal ions in the soil enter the mixed solution, causing the density of the solution to gradually increase. With the liquid level of the mixed solution remaining constant, the float mechanism gradually rises as the density of the solution increases. This rise of the float mechanism drives the linkage mechanism, thereby causing a change in the display component. By observing the changes in the display component, the acid washing progress can be intuitively judged. When the display component stabilizes, it indicates that the density of the mixed solution has stabilized, meaning the acid washing of heavy metals in the soil has reached its endpoint.

[0007] Furthermore, the float mechanism includes a float body, a supporting beam is provided at the top of the mixing acid washing tank, the float body is movably connected to the supporting beam in the vertical direction, and the float body is drivenly connected to the linkage mechanism in the vertical direction.

[0008] In this scheme, the float body is movably connected to the supporting beam in the vertical direction, so that the float body can float stably in the mixed pickling tank. Then, by connecting the float body to the linkage mechanism in the vertical direction, the height change of the float body is stably transmitted to the linkage mechanism for output.

[0009] Furthermore, the float mechanism also includes a limiting rod, the supporting beam is provided with a limiting ring, the limiting rod is fixedly connected to the top of the float body in the vertical direction and passes through the limiting ring, the top of the limiting rod is provided with a limiting boss, and the outer diameter of the limiting boss is larger than the inner diameter of the limiting ring.

[0010] In this design, a movable connection is achieved by a limiting rod passing through a limiting ring, allowing the float mechanism to float at a certain height within a certain range. After the mixed liquid in the acid washing tank is discharged, the limiting boss can support the float mechanism and prevent it from detaching from the supporting beam.

[0011] Furthermore, the display assembly includes a U-shaped tube, a piston tube, and a translational piston. The U-shaped tube is fixedly connected to the side wall of the mixing pickling tank and contains liquid. One end of the U-shaped tube is connected to the piston tube. The translational piston is fixedly connected to the second rack and slidably connected in the piston tube.

[0012] In this scheme, liquid is contained in a U-shaped tube. The second rack pushes the translational piston to move in the piston tube. Since the piston tube and one end of the U-shaped tube are sealed together, the liquid level in the U-shaped tube will change, thus allowing the progress of soil acid washing to be observed directly.

[0013] Furthermore, the linkage mechanism includes a first rotating shaft, a first gear, a second gear, and a second rack. The first rotating shaft is rotatably connected to the supporting crossbeam. One end of the first rotating shaft is coaxially and fixedly connected to the first gear, and the other end of the first rotating shaft is coaxially and fixedly connected to the second gear. The top of the float body is fixedly connected to the first rack in the vertical direction. The first gear meshes with the first rack, the second gear meshes with the second rack, the second rack is slidably connected to the supporting crossbeam, and one end of the second rack is connected to the translational piston.

[0014] In this scheme, the float body rises, causing the first rack to move vertically. The first rack drives the first gear to rotate, which in turn drives the first shaft to rotate. The first shaft drives the second gear to rotate, the second gear drives the second rack to move, and the second rack causes the display component to change, so as to show the progress of soil acid washing.

[0015] Furthermore, the supporting beam is fixedly connected to a rolling support, and at least two rolling elements that roll along the length direction of the second rack are rotatably connected to the rolling support. A guide groove is provided at the bottom of the second rack, and the second rack abuts against each of the rolling elements through the guide groove.

[0016] In this design, by setting a rolling support and a rolling element, the second rack can move on the rolling element. At the same time, by setting a guide groove at the bottom of the second rack, a limiting function is provided to prevent the second rack from deviating.

[0017] Furthermore, the diameter of the second gear is greater than the diameter of the first gear, and / or the diameter of the U-shaped tube on the side connected to the piston tube is greater than the diameter of the other side of the U-shaped tube.

[0018] In this scheme, when the diameter of the second gear is greater than that of the first gear, based on the meshing transmission relationship between the gear and the rack, the moving distance of the second rack will be greater than the rising height of the first rack, thus amplifying the change in the rising distance of the float mechanism; when the diameter of the U-shaped tube near the piston tube is greater than that of the end far from the piston tube, under the push of the translational piston, the change in liquid level at the end with the smaller diameter will be greater than that at the end with the larger diameter, thus amplifying the change in the rising distance of the float mechanism, so as to accurately reflect the density change of the mixed solution in the mixed pickling tank, and also make it easier to observe.

[0019] Furthermore, the monitoring device also includes a filtration assembly comprising a filter frame and a filter membrane. The filter frame is fixedly connected to the support beam, and the filter membrane covers the circumference and bottom of the filter frame to form an isolation space in the mixed pickling tank. The float mechanism is located in the isolation space.

[0020] In this scheme, an isolation space is formed in the mixed pickling tank by a filtration component. The filtration membrane can filter the mixed liquid, which can filter out the soil in the mixed liquid and obtain a relatively pure mixed liquid environment in the isolation space. On the other hand, it can reduce the disturbance caused by the mixing of the mixed liquid and ensure the relative stability of the float mechanism.

[0021] Furthermore, a sludge scraping mechanism is connected to the outside of the filter assembly. The sludge scraping mechanism includes a scraper blade, a scraper transmission assembly, a scraper connection assembly, and a scraper drive component. The fixed end of the scraper drive component is fixedly connected to the support beam, and the output end of the scraper drive component is connected to the scraper transmission assembly. The scraper transmission assembly is connected to the scraper connection assembly to drive the scraper connection assembly to rotate around the filter assembly. The scraper connection assembly is fixedly connected to the scraper blade, and the scraper blade is in contact with the filter membrane.

[0022] In this solution, the sludge scraping mechanism can remove the sludge and sand adhering to the outer surface of the filter membrane, thereby ensuring the filtration effect of the filter assembly.

[0023] Furthermore, the sludge scraping transmission assembly includes a third gear, a fourth gear, a sludge scraping rotating bearing, and a sludge scraping ring. The sludge scraping rotating bearing is coaxially arranged with the filter assembly. The third gear is coaxially and fixedly connected to the output end of the sludge scraping drive component. The fourth gear is coaxially and fixedly connected to the outer ring of the sludge scraping rotating bearing through the sludge scraping ring. The inner ring of the sludge scraping rotating bearing is fixedly connected to the support beam. The bottom of the sludge scraping ring is fixedly connected to the sludge scraping connecting assembly.

[0024] In this solution, the scraper drive drives the third gear to rotate, the third gear meshes with and drives the fourth gear to rotate, and the fourth gear drives the outer ring of the bearing to rotate, thereby causing the scraper ring to drive the scraper assembly to rotate around the filter assembly and scrape off the mud and sand adhering to the outer surface of the filter membrane.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] I. This utility model's soil heavy metal leaching progress monitoring device allows for intuitive judgment of the leaching progress by observing changes in the display components. When the display components stabilize, it indicates that the density of the mixed solution has stabilized, signifying the end of the soil heavy metal leaching process. This device eliminates the need for repeated sampling experiments of the mixed solution, significantly improving the efficiency of soil leaching operations.

[0027] II. The soil heavy metal acid washing progress monitoring device of this utility model is equipped with a filter component and a sludge scraping mechanism. The filter component can filter out the soil in the mixed liquid, so as to obtain a relatively pure mixed liquid environment in the isolation space. On the other hand, it can reduce the disturbance caused by the mixing of the mixed liquid and ensure the relative stability of the float component. The sludge scraping mechanism can scrape off the mud and sand adhering to the outer surface of the filter membrane, thereby ensuring the filtration effect of the filter component. Attached Figure Description

[0028] Figure 1 This is a three-dimensional view of the overall structure of the soil heavy metal leaching progress monitoring device of this utility model;

[0029] Figure 2 yes Figure 1 Front view of the monitoring device;

[0030] Figure 3 yes Figure 1 Top view of the monitoring device;

[0031] Figure 4 This is a schematic diagram of the float mechanism;

[0032] Figure 5 yes Figure 4 Enlarged view of point A on the float mechanism;

[0033] Figure 6 yes Figure 4 Enlarged view of point B on the float mechanism;

[0034] Figure 7 yes Figure 1 Enlarged view of point C on the monitoring device;

[0035] Figure 8 yes Figure 1 Enlarged view of point D on the monitoring device;

[0036] Figure 9 This is a partial structural diagram of the second rack;

[0037] Figure 10 This is a structural diagram of the filter assembly and the sludge scraping mechanism;

[0038] Figure 11 yes Figure 10 Another structural diagram of the filter assembly and sludge scraping mechanism;

[0039] Figure 12 yes Figure 11 Enlarged view of point E of the filter assembly and sludge scraping mechanism;

[0040] Figure 13 yes Figure 11 Enlarged view of the filter assembly and sludge scraping mechanism at point F;

[0041] Figure 14 This is a structural diagram of the scraper blade and scraper connector.

[0042] In the attached diagram: 1. Mixing pickling tank; 11. Support beam; 111. Annular part; 12. Limiting ring; 13. Rolling support; 14. Rolling element; 15. Bearing seat; 16. Inlet; 17. Outlet; 18. Drain pipe; 181. Drain pump; 19. Soil inlet; 2. Float mechanism; 21. Float body; 22. First rack; 23. Limiting rod; 24. Limiting boss; 3. Linkage mechanism; 31. First rotating shaft; 32. First gear; 33. Second gear; 34. Second rack; 341. Guide groove; 4. Display component; 41. U-shaped tube; 411 1. First pipe section; 412. Second pipe section; 42. Piston tube; 43. Translational piston; 44. Pipe clamp; 5. Filter assembly; 51. Filter frame; 52. Filter membrane; 53. Isolation space; 54. L-shaped fixed column; 6. Sludge scraping mechanism; 61. Sludge scraper; 62. Sludge scraping transmission assembly; 621. Third gear; 622. Fourth gear; 623. Sludge scraping rotating bearing; 624. Sludge scraping ring; 63. Sludge scraping connecting assembly; 631. Receiving ring; 632. Receiving column; 64. Sludge scraping drive component; 7. Agitator propeller; 8. Agitator motor; 9. Solid-liquid separation filter press. Detailed Implementation

[0043] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0044] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0045] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0046] Example 1

[0047] like Figures 1 to 14 As shown, this embodiment discloses a device for monitoring the progress of soil heavy metal leaching. (Reference) Figure 1The monitoring device includes a mixed pickling tank 1, a float mechanism 2, a linkage mechanism 3, and a display component 4. The float mechanism 2 is floated in the mixed pickling tank 1. One end of the linkage mechanism 3 is connected to the float mechanism 2 for transmission, and the other end of the linkage mechanism 3 is connected to the display component 4 to drive the display component 4 to change.

[0048] In this embodiment, soil contaminated with heavy metals and acid used for soil cleaning are mixed in a mixing pickling tank 1. The heavy metals in the soil react chemically with the acid, dissolving into it and thus removing the heavy metals from the soil to achieve soil remediation. As the pickling process continues, heavy metal ions from the soil enter the mixed solution, causing its density to gradually increase. With the liquid level of the mixed solution remaining constant, the float mechanism 2 gradually rises as the density increases. The rise of the float mechanism 2 drives the linkage mechanism 3, which in turn causes the display component 4 to change. By observing the changes in the display component 4, the pickling progress can be visually judged. When the display component 4 stabilizes, it indicates that the density of the mixed solution has stabilized, signifying the end of the heavy metal pickling process.

[0049] In related technologies, there are also methods to test the composition of acid solution to monitor the pickling progress through experiments. However, this requires repeated sampling and experiments, and involves many types of heavy metal elements, which in turn requires a lot of experiments, resulting in low efficiency.

[0050] The inventors discovered that during the acid leaching of heavy metals from soil, the density of the acid solution increases as heavy metals enter in ionic form. For example, at a concentration of 10% by mass, the density of a sulfuric acid solution is approximately 1.06 g / cm³. 3 The density of copper sulfate solution is approximately 1.08 g / cm³. 3 The density of cadmium sulfate solution is approximately 1.15 g / cm³. 3 The density of chromium sulfate solution is approximately 1.2 g / cm³. 3 Therefore, the progress of soil acid washing can be judged by the change in acid solution density.

[0051] Specifically, in this embodiment, the change in pickling density is obtained through the float mechanism 2. The buoyancy of the float mechanism 2 in the mixed pickling tank 1 is equal to the weight of the liquid it displaces. Therefore, as heavy metal elements enter the acid solution and increase its density, the float mechanism 2 also rises accordingly, causing the display component 4 to change via the linkage mechanism 3. When there is sufficient acid, if the acid solution density stabilizes, it indicates that the soil heavy metal pickling has reached its end. Since the pickling progress can be obtained by observing the changes in the display component 4 without experimental testing, the efficiency is high.

[0052] The specific structure of each part of this device will be further explained below with reference to the accompanying drawings.

[0053] refer to Figure 1 and Figure 4 The float mechanism 2 includes a float body 21. A supporting beam 11 is provided at the top of the mixing pickling tank 1. The float body 21 is movably connected to the supporting beam 11 in the vertical direction. A first rack 22 is fixedly connected to the float body 21 in the vertical direction for transmission connection with the linkage mechanism 3. By movably connecting the float body 21 to the supporting beam 11 in the vertical direction, the float body 21 can float stably in the mixing pickling tank 1. The height change of the float body 21 is stably transmitted to the linkage mechanism 3 for output through the first rack 22 set in the vertical direction.

[0054] Specifically, the support beam 11 spans across the mixing pickling tank 1, with both ends fixedly connected to the tank 1. An annular portion 111 is formed in the middle of the support beam 11 to facilitate the installation of the float body 21. The float body 21 can be approximately conical, with its tip pointing downwards, and is positioned below the annular portion 111 in the middle of the support beam 11. The taper of the float body 21 can be relatively small, allowing it to float a longer distance when the acid density changes, thus facilitating the movement of the display component 4 and making observation easier. A first rack 22 is fixedly connected to the top center of the float body 21, and the first rack 22 is vertically oriented. The first rack 22 can move with the up-and-down movement of the float body 21, thereby outputting to the linkage mechanism 3.

[0055] To limit the horizontal position of the float body 21 and prevent the float mechanism 2 from detaching from the supporting beam 11, the float mechanism 2 also includes limiting rods 23, and the supporting beam 11 is provided with limiting rings 12. Multiple limiting rings 12 are arranged along the inner circle of the annular portion 111 of the supporting beam 11. Multiple limiting rods 23 are vertically fixed to the top of the float body 21 and pass through the limiting rings 12. The top of the limiting rods 23 is provided with limiting bosses 24, the outer diameter of which is larger than the inner diameter of the limiting rings 12. The limiting rods 23 pass through the limiting rings 12 to achieve a movable connection, allowing the float mechanism 2 to float within a certain range. When the mixed liquid in the acid washing tank 1 is discharged, the limiting bosses 24 can support the float mechanism 2, preventing it from detaching from the bottom when the acid solution is insufficient. Among them, multiple limit rods 23 are provided on the top of the float body 21 along the circumference, which can prevent the float body 21 from shifting in the horizontal direction and also prevent the float body 21 from rotating around the vertical axis.

[0056] refer to Figure 1 , Figures 4 to 7The linkage mechanism 3 includes a first rotating shaft 31, a first gear 32, a second gear 33, and a second rack 34. The first rotating shaft 31 is rotatably connected to the support beam 11. One end of the first rotating shaft 31 is coaxially fixedly connected to the first gear 32, and the other end of the first rotating shaft 31 is coaxially fixedly connected to the second gear 33. The first gear 32 meshes with the first rack 22, and the second gear 33 meshes with the second rack 34. The second rack 34 is slidably connected to the support beam 11, and one end of the second rack 34 is connected to the display component 4. A bearing seat 15 is provided on the support beam 11, and the first rotating shaft 31 is rotatably connected to the bearing seat 15 through the bearing.

[0057] During the entire transmission process, the float body 21 rises, causing the first rack 22 to move vertically. The first rack 22 drives the first gear 32 to rotate, which in turn drives the first shaft 31 to rotate. The first shaft 31 drives the second gear 33 to rotate, and the second gear 33 drives the second rack 34 to move. The second rack 34 causes the display component 4 to change, so as to display the progress of soil acid washing.

[0058] Specifically, referring to the XYZ coordinate system shown in Figure 1, the first rack 22 is positioned along the Z-axis, the first rotating shaft 31 is positioned along the X-axis, and the second rack 34 is positioned along the Y-axis. Through the meshing of the first gear 32 and the first rack 22, the translational motion of the float body 21 along the Z-axis is converted into the rotation of the first rotating shaft 31 around the X-axis. Then, through the meshing of the second gear 33 and the second rack 34, the rotation around the X-axis is converted into the translational motion of the second rack 34 along the Y-axis.

[0059] Therefore, in this embodiment, the height change of the float body 21 in the Z direction is converted into a displacement change of the second rack 34 in the Y direction by the linkage mechanism 3, so as to facilitate connection to the external display component 4. Of course, the linkage mechanism 3 provided in this embodiment is only one specific form, and those skilled in the art can also implement it through other transmission structures, which will not be elaborated here.

[0060] To more clearly display the height change of the float body 21, the diameter of the second gear 33 can be set to be larger than the diameter of the first gear 32. For example, if the diameter of the second gear 33 is six times that of the first gear 32, the linear velocity of the second gear 33 is also six times that of the first gear 32 when rotating by the same angle. This can magnify the upward distance of the float body 21, making it easier to drive the display component 4 to change and observe.

[0061] refer to Figure 7 and Figure 9A rolling support 13 is fixedly connected to the supporting beam 11. At least two rolling elements 14 that roll along the length of the second rack 34 are rotatably connected to the rolling support 13. A guide groove 341 is provided at the bottom of the second rack 34, and the second rack 34 abuts against each of the rolling elements 14 through the guide groove 341. In this embodiment, by setting the rolling support 13 and the rolling elements 14, the second rack 34 can move on the rolling elements 14. At the same time, the guide groove 341 at the bottom of the second rack 34 serves as a limit to prevent the second rack 34 from deviating.

[0062] Specifically, multiple rolling supports 13 can be provided along the length of the second rack 34, and the rolling element 14 can be formed by connecting a mounting shaft through a bearing. The inner ring of the bearing is fixedly connected to the mounting shaft, and both ends of the mounting shaft are fixedly connected to the rolling supports 13. The outer ring of the bearing protrudes upwards and contacts the bottom of the second rack 34, providing support to the bottom of the second rack 34 and reducing resistance during its movement. A guide groove 341 is also provided along the length of the bottom of the second rack 34. The width of the guide groove 341 is slightly larger than the width of the bearing. The guide groove 341 limits the movement of the second rack 34, allowing it to move along the rolling direction of the bearing without disengaging from the side.

[0063] Of course, the rolling support 13 and rolling element 14 shown in this embodiment are only one specific way to guide the second rack 34. Those skilled in the art can design other guiding structures to achieve the same result. For example, it can be achieved through a guide rail slider structure. The guide rail is fixedly connected to the support beam 11 along the length of the second rack 34, and sliders are slidably connected to the guide rail. Multiple sliders can be provided. The top of the slider is fixedly connected to the bottom of the second rack 34, and the guide rail sliders guide and limit the movement of the second rack 34.

[0064] refer to Figure 1 , Figure 7 and Figure 8 The display component 4 includes a U-shaped tube 41, a piston tube 42, and a translational piston 43. The U-shaped tube 41 is fixedly connected to the side wall of the mixing pickling tank 1 and contains liquid. One end of the U-shaped tube 41 is connected to the piston tube 42. The piston tube 42 and the second rack 34 are located on the same straight line. The translational piston 43 is fixedly connected to the second rack 34 and slidably connected in the piston tube 42. In this embodiment, the U-shaped tube 41 contains liquid, and the second rack 34 pushes the translational piston 43 to move in the piston tube 42. Since the piston tube 42 and one end of the U-shaped tube 41 are sealed together, the liquid level in the U-shaped tube 41 will change, thus allowing for a direct observation of the progress of soil pickling.

[0065] Specifically, the U-shaped tube 41 and the piston tube 42 can be integrally formed, or they can be connected through an intermediate pipe, as long as one end of the piston tube 42 and the U-shaped tube 41 are sealed and connected. The piston tube 42 includes at least one section that is collinear with the second rack 34, allowing the second rack 34 to push the translational piston 43 within the piston tube 42. The U-shaped tube 41 is fixedly connected to the outer side wall of the mixing pickling tank 1 via a pipe clamp 44. The U-shaped tube 41 contains a colored, non-volatile liquid, and graduations are provided on the side wall of the U-shaped tube 41 for easy observation.

[0066] To make the changes in liquid level in the U-shaped tube 41 more noticeable, the side connecting the U-shaped tube 41 to the piston tube 42 can be designated as the first tube segment 411, and the other side as the second tube segment 412. The diameter of the first tube segment 411 is larger than the diameter of the second tube segment 412. For example, if the diameter of the first tube segment 411 is twice the diameter of the second tube segment 412, then the cross-sectional area of ​​the first tube segment 411 is four times that of the second tube segment 412, which is equivalent to magnifying the changes in liquid level by four times, making them easier to observe.

[0067] In other embodiments, the scraper drive assembly 62 may also be connected using other transmission structures, as long as the output power of the scraper drive assembly can be transmitted to the scraper blade 61. Further details are omitted here.

[0068] In other embodiments, the display component 4 may display in other ways. For example, the display component 4 may be implemented by connecting the block to the end of the second rack 34 via a traction rope, the traction rope passing through a pulley system to change its direction of movement, and displaying the change in the height of the block.

[0069] It is understandable that the change in the acid washing progress and the display component 4 does not necessarily have to be linear; as long as there is a positive correlation between the two, the acid washing progress can be determined. When the display component 4 stabilizes, and there is sufficient acid solution, it can be determined that the soil acid washing has reached its end.

[0070] refer to Figures 1 to 3 A stirring propeller 7 can be installed inside the mixing pickling tank 1, and the stirring propeller 7 is connected to a stirring motor 8 for driving. Three sets of stirring propellers 7 can be arranged along the circumference of the mixing pickling tank 1. The axis of each set of stirring propellers 7 is horizontal and does not pass through the central axis of the mixing pickling tank 1, but is arranged obliquely outwards. For example, the axes of the three sets of stirring propellers 7 can form an equilateral triangle in the mixing pickling tank 1 in a clockwise or counterclockwise direction, which can better propel the water flow to rotate in the tank, allowing the soil and acid solution to mix thoroughly, thereby improving the pickling effect and the removal of heavy metals.

[0071] refer to Figures 1 to 3The mixing pickling tank 1 has an inlet 16 on its side and an outlet 17 at its bottom. The outlet 17 can be connected to a drain pipe 18, which is equipped with a drain pump 181 and connected to a solid-liquid separation filter press 9 for solid-liquid separation. A soil inlet 19 is also provided on the side wall of the mixing pickling tank 1 for feeding soil contaminated with heavy metals.

[0072] Example 2

[0073] refer to Figure 1 and Figure 4 This embodiment is similar to Embodiment 1, except that the soil heavy metal pickling progress monitoring device disclosed in this embodiment further includes a filter assembly 5. The filter assembly 5 includes a filter frame 51 and a filter membrane 52. The filter frame 51 is fixedly connected to the supporting beam 11. The filter membrane 52 covers the circumference and bottom of the filter frame 51 to form an isolation space 53 in the mixed pickling tank 1. The float mechanism 2 is located in the isolation space 53. By forming the isolation space 53 in the mixed pickling tank 1 through the filter assembly 5, the filter membrane 52 can filter the mixed liquid. On the one hand, it can filter out the soil in the mixed liquid and obtain a relatively pure mixed liquid environment in the isolation space 53. On the other hand, it can reduce the disturbance caused by the mixing of the mixed liquid and ensure the relative stability of the float assembly.

[0074] Specifically, the isolation space 53 has an opening at the top, allowing the float mechanism 2 to be placed inside from the top. The isolation space 53 is sealed with a filter membrane 52 around its circumference and bottom to prevent sediment from entering the mixture. The internal dimensions of the isolation space 53 are larger than the dimensions of the float mechanism 2, thus preventing direct contact between the float mechanism 2 and the filter assembly 5, avoiding interference with the float body 21's buoyancy. The isolation space 53 formed inside the filter assembly 5 can be conical, similar in shape to the float body 21, but larger. This ensures effective buoyancy of the float body 21 while reducing the volume of the mixture to be filtered.

[0075] Example 3

[0076] refer to Figure 1 , Figures 10 to 14This embodiment is similar to Embodiment 2, except that a scraping mechanism 6 is connected to the outside of the filter assembly 5. The scraping mechanism 6 includes a scraper plate 61, a scraping transmission assembly 62, a scraping connecting assembly 63, and a scraping drive component 64. The fixed end of the scraping drive component 64 is fixedly connected to the support beam 11, and the output end of the scraping drive component 64 is connected to the scraping transmission assembly 62. The scraping transmission assembly 62 is connected to the scraping connecting assembly 63 to drive the scraping connecting assembly 63 to rotate around the filter assembly 5. The scraping connecting assembly 63 is fixedly connected to the scraper plate 61, and the scraper plate 61 is in contact with the filter membrane 52. The scraping mechanism 6 can scrape away the mud and sand adhering to the outer surface of the filter membrane 52, thereby ensuring the filtration effect of the filter assembly 5.

[0077] Specifically, the scraper connection assembly 63 can be a roughly frame-shaped structure surrounding the outside of the filter assembly 5. For example, the scraper connection assembly 63 includes multiple receiving rings 631 and receiving posts 632. Individual receiving rings 631 are arranged horizontally around the outside of the filter assembly 5, and different receiving rings 631 are arranged sequentially in the vertical direction. The receiving rings 631 are fixedly connected to each other through the receiving posts 632 to form the frame structure of the scraper connection assembly 63. Multiple scraper blades 61 can be provided and fixedly connected to the receiving rings 631 respectively. For example, two scraper blades 61 are arranged opposite each other on both sides of the filter assembly 5. The length direction of the scraper blades 61 is inclined vertically, so that one side of the scraper blades 61 is attached to the outside of the filter assembly 5. The scraper drive component 64 can be a scraper motor, and the fixed end of the scraper motor is fixedly connected to the support beam 11.

[0078] refer to Figures 10 to 14 The sludge scraping drive assembly 62 includes a third gear 621, a fourth gear 622, a sludge scraping rotating bearing 623, and a sludge scraping ring 624. The sludge scraping rotating bearing 623 is coaxially arranged with the filter assembly 5. The third gear 621 is coaxially and fixedly connected to the output end of the sludge scraping drive component 64. The fourth gear 622 is coaxially and fixedly connected to the outer ring of the sludge scraping rotating bearing 623. The inner ring of the sludge scraping rotating bearing 623 is fixedly connected to the support beam 11. The sludge scraping ring 624 is sleeved on the outer ring of the bearing, and the bottom of the sludge scraping ring 624 is fixedly connected to the sludge scraping connection assembly 63. The sludge scraping drive component 64 drives the third gear 621 to rotate, which in turn drives the fourth gear 622 to rotate. The fourth gear 622 drives the outer ring of the bearing to rotate, thereby causing the sludge scraping ring 624 to drive the sludge scraping assembly to rotate around the filter assembly 5, scraping away the mud and sand adhering to the outer surface of the filter membrane 52.

[0079] refer to Figures 10 to 14The upper end of the support column 632 located at the top is fixedly connected to the lower end of the scraper ring 624 of the outer ring of the scraper rotating bearing 623. The top of the filter frame 51 is fixedly connected to the bottom of the support beam 11 through the L-shaped fixing column 54. The L-shaped fixing column 54 extends outward in the horizontal direction of the support part, so that the inner ring of the scraper rotating bearing 623 can be mounted and fixed on the support part of the L-shaped fixing column 54.

[0080] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for monitoring the progress of an acid wash of heavy metals from soil, characterised in that: The application relates to a mixed acid pickling tank, which comprises a mixed acid pickling tank (1), a floating mechanism (2), a linkage mechanism (3) and a display assembly (4), the floating mechanism (2) is arranged in the mixed acid pickling tank (1) in a floating mode, one end of the linkage mechanism (3) is in transmission connection with the floating mechanism (2), and the other end of the linkage mechanism (3) is connected with the display assembly (4) to drive the display assembly (4) to change.

2. The soil heavy metal pickling progress monitoring device according to claim 1, characterized in that: The floating mechanism (2) comprises a floating main body (21), the top of the mixed acid pickling tank (1) is provided with a supporting cross beam (11), the floating main body (21) is in vertical movable connection with the supporting cross beam (11), and the floating main body (21) is in transmission connection with the linkage mechanism (3) in the vertical direction.

3. The apparatus for monitoring the progress of soil heavy metal acid washing according to claim 2, characterized in that: The floating mechanism (2) further comprises a limiting rod (23), the supporting cross beam (11) is provided with a limiting ring (12), the limiting rod (23) is fixedly connected to the top of the floating main body (21) in the vertical direction and passes through the limiting ring (12), the top of the limiting rod (23) is provided with a limiting boss (24), and the outer diameter of the limiting boss (24) is larger than the inner diameter of the limiting ring (12).

4. The soil heavy metal pickling progress monitoring device according to claim 2, characterized in that: The display assembly (4) comprises a U-shaped pipe (41), a piston pipe (42) and a sliding piston (43), the U-shaped pipe (41) is fixedly connected with the side wall of the mixed acid pickling tank (1) and contains liquid, one end of the U-shaped pipe (41) is in communication with the piston pipe (42), and the sliding piston (43) is connected with the linkage mechanism (3) and is in sliding connection in the piston pipe (42).

5. The apparatus for monitoring the progress of soil heavy metal pickling according to claim 4, characterized in that: The linkage mechanism (3) comprises a first rotating shaft (31), a first gear (32), a second gear (33) and a second rack (34), the first rotating shaft (31) is rotationally connected to the supporting cross beam (11), one end of the first rotating shaft (31) is coaxially fixedly connected with the first gear (32), the other end of the first rotating shaft (31) is coaxially fixedly connected with the second gear (33), the top of the floating main body (21) is fixedly connected with a first rack (22) in the vertical direction, the first gear (32) is in meshing connection with the first rack (22), the second gear (33) is in meshing connection with the second rack (34), the second rack (34) is in sliding connection with the supporting cross beam (11), and one end of the second rack (34) is connected with the sliding piston (43).

6. The apparatus for monitoring the progress of soil heavy metal pickling according to claim 5, characterized in that: The supporting cross beam (11) is fixedly connected with a rolling support (13), at least two rolling members (14) which roll along the length direction of the second rack (34) are rotationally connected to the rolling support (13), the bottom of the second rack (34) is provided with a guide groove (341), and the second rack (34) abuts against each rolling member (14) through the guide groove (341).

7. The soil heavy metal acid washing progress monitoring device according to claim 5, characterized in that: The diameter of the second gear (33) is larger than that of the first gear (32), and / or the pipe diameter of the side, where the U-shaped pipe (41) is connected with the piston pipe (42), is larger than that of the other side of the U-shaped pipe (41).

8. The soil heavy metal pickling progress monitoring device according to claim 2, characterized in that: Also include a filter assembly (5), the filter assembly (5) includes a filter frame (51) and filter membrane (52), the filter frame (51) is fixedly connected with the support beam (11), the filter membrane (52) is coated in the circumferential direction and the bottom of the filter frame (51) to form an isolated space (53) in the mixed acid pickling tank (1), the floating mechanism (2) is located in the isolated space (53).

9. The apparatus for monitoring the progress of soil heavy metal acid washing according to claim 8, characterized in that: The outer side of the filter assembly (5) is connected with a mud scraping mechanism (6), the mud scraping mechanism (6) includes a mud scraping plate (61), a mud scraping transmission assembly (62), a mud scraping connecting assembly (63) and a mud scraping driving piece (64), the fixed end of the mud scraping driving piece (64) is fixedly connected with the support beam (11), the output end of the mud scraping driving piece (64) is connected with the mud scraping transmission assembly (62), the mud scraping transmission assembly (62) is connected with the mud scraping connecting assembly (63) to drive the mud scraping connecting assembly (63) to rotate around the filter assembly (5), the mud scraping connecting assembly (63) is fixedly connected with the mud scraping plate (61), and the mud scraping plate (61) is in contact with the filter membrane (52).

10. The apparatus for monitoring the progress of soil heavy metal pickling according to claim 9, characterized in that: The mud scraping transmission assembly (62) includes a third gear (621), a fourth gear (622), a mud scraping rotating bearing (623) and a mud scraping ring (624), the mud scraping rotating bearing (623) is coaxially arranged with the filter assembly (5), the third gear (621) is coaxially fixedly connected with the output end of the mud scraping driving piece (64), the fourth gear (622) is coaxially fixedly connected with the outer ring of the mud scraping rotating bearing (623) through the mud scraping ring (624), the inner ring of the mud scraping rotating bearing (623) is fixedly connected with the support beam (11), and the bottom of the mud scraping ring (624) is fixedly connected with the mud scraping connecting assembly (63).

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