A device for classifying and pickling and regenerating contaminated soil

Abstract

The present invention relates to the field of soil regeneration technology, and discloses a contaminated soil graded acid washing and regeneration device, comprising a leaching assembly, including a support body, a support seat, a discharge pipe, a discharge funnel, a filter plate, a mixing box, a water inlet pipe, a reagent pipe, a delivery pipe, and a leaching box, wherein the support seat is fixed to the bottom of the support body, the discharge pipe is fixed in the support body, the discharge funnel is fixed to the top of the discharge pipe, the filter plate is fixed in the discharge funnel, and the mixing box is arranged on the top of the support body. The beneficial effects of the present invention are as follows: by providing a mixing assembly, the soil and the leaching liquid can be more efficiently and fully contacted and mixed, thereby improving the leaching efficiency; the design of the water storage tank saves the use of the leaching liquid and clean water; by improving the mixing efficiency, the mixing distance of the soil and the leaching liquid is shortened, so that the volume of the entire device is reduced, thereby reducing the floor space and transportation costs.

Description

Technical Field

[0001] The invention relates to the technical field of soil regeneration, in particular to a device for graded acid washing and regeneration of contaminated soil. Background Art

[0002] As environmental pollution becomes increasingly severe, soil contamination has become a global concern. Contaminated soil not only affects the growth and quality of crops but also poses a potential threat to human health through the food chain. Therefore, the development of efficient and environmentally friendly soil remediation technologies is crucial.

[0003] Among traditional methods for remediating contaminated soil, leaching technology is highly favored because it can effectively remove harmful substances such as heavy metals and organic pollutants in the soil. However, existing leaching devices have many shortcomings in actual application. On the one hand, due to differences in factors such as soil properties, pollutant types and concentrations, a large amount of water resources are often required during the leaching process to fully mix the soil and water, which not only increases the treatment cost but may also cause waste of water resources. On the other hand, the mixing efficiency of soil and leaching liquid directly affects the leaching effect. In existing leaching devices, the mixing efficiency of soil and leaching liquid is often low, resulting in low leaching efficiency, long processing time, and the need for a larger device volume and a longer mixing stroke to ensure the mixing effect. Summary of the Invention

[0004] In view of the above problems existing in the existing contaminated soil graded acid washing and regeneration device, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is that the existing contaminated soil graded acid washing and regeneration device consumes a large amount of water resources and has a large device size.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a contaminated soil graded acid washing and regeneration device, comprising: a leaching assembly, including a support body, a support seat, a discharge pipe, a discharge funnel, a filter plate, a mixing box, a water inlet pipe, a chemical pipe, a delivery pipe and a leaching box, wherein the support seat is fixed to the bottom of the support body, the discharge pipe is fixed in the support body, the discharge funnel is fixed to the top of the discharge pipe, the filter plate is fixed in the discharge funnel, the mixing box is arranged on the top of the support body, the water inlet pipe and the chemical pipe are both fixed to the top of the mixing box, the delivery pipe is fixed to one side of the mixing box, the other end of the delivery pipe is fixed in the discharge pipe, and the leaching box is rotatably connected to the support body;

[0007] A mixing assembly is arranged on the support body, including a support sleeve fixed in the washing box, a rotating shaft is rotatably connected in the support sleeve, a limit plate is fixed on the end of the rotating shaft, a lifting sleeve slides on the surface of the limit plate, a first spring is sleeved on the surface of the rotating shaft, a sliding groove is provided on the surface of the rotating shaft, a limit bar is fixed in the lifting sleeve, the limit bar slides in the sliding groove, a connecting sleeve is fixed on the surface of the lifting sleeve, a mixing grid is provided at the end of the lifting sleeve, the connecting sleeve is fixed to the surface of the mixing grid by bolts, a mounting ring is fixed on the surface of the lifting sleeve, a breaking rod is fixed on the surface of the mounting ring, and a breaking hook is fixed on the end of the breaking rod.

[0008] As a preferred embodiment of the contaminated soil graded acid washing and regeneration device of the present invention, the mixing assembly further comprises a driving member, which is disposed within the support body and includes a fixing ring fixed within the support body, wherein teeth are fixed to one side of the fixing ring, a driving gear is fixed to the surface of the rotating shaft, and the driving gear is meshed with the teeth.

[0009] As a preferred embodiment of the contaminated soil graded acid washing and regeneration device of the present invention, the mixing assembly further comprises a protective member, which is arranged in the elution box and includes a support rod fixed to the inner wall of the elution box, and a protective cover is fixed to the other end of the support rod, the cross-section of the protective cover is an inverted "" shape, and there are multiple support rods fixed on the surface of the protective cover.

[0010] As a preferred solution of the contaminated soil graded acid washing and regeneration device of the present invention, the mixing assembly further includes a guide plate fixed in the elution box, and a water storage tank is provided in the elution box.

[0011] As a preferred embodiment of the contaminated soil graded acid washing and regeneration device of the present invention, the mixing assembly further comprises a power part, which is arranged on the support body and includes a fixed seat fixed to the inner wall of the support body, a gear ring is rotatably connected to the fixed seat, and the gear ring is fixed to the surface of the washing box.

[0012] As a preferred embodiment of the contaminated soil graded acid washing and regeneration device of the present invention, the power part further includes a support shell fixed to the surface of the support body, a support shaft is rotatably connected inside the support shell, a rotating gear is fixed to the surface of the support shaft, and the rotating gear is meshed with the gear ring.

[0013] As a preferred embodiment of the contaminated soil graded pickling and regeneration device according to the present invention, the power component further comprises a worm gear fixed to the surface of the support shaft, a drive rod is rotatably connected to the support shell, a worm is fixed to the surface of the drive rod, a drive motor is provided on one side of the support shell, and the end of the drive rod is located on the output end surface of the drive motor.

[0014] As a preferred solution of the contaminated soil graded acid washing and regeneration device of the present invention, the end of the feed pipe is open.

[0015] As a preferred solution of the contaminated soil graded acid washing and regeneration device of the present invention, the end of the conveying pipe is located in the vertical section of the discharge pipe.

[0016] As a preferred solution of the contaminated soil graded acid washing and regeneration device of the present invention, a stirring mechanism is provided in the mixing tank.

[0017] The beneficial effects of the present invention are as follows: by providing a mixing component, the soil and the eluent can be more efficiently and fully contacted and mixed, thereby improving the elution efficiency; the design of the water storage tank saves the use of eluent and clean water; by improving the mixing efficiency, the mixing distance of the soil and the eluent is shortened, and the volume of the entire device is reduced, thereby reducing the floor space and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0019] Figure 1 This is the structural diagram of the contaminated soil graded acid washing and regeneration device.

[0020] Figure 2 This is a cross-sectional structural diagram of the contaminated soil graded acid washing and regeneration device.

[0021] Figure 3 A graded acid washing and regeneration device for contaminated soil Figure 2 A magnified view of the local structure at point A.

[0022] Figure 4 A graded acid washing and regeneration device for contaminated soil Figure 2 Enlarged view of the local structure at point B in the middle.

[0023] Figure 5 This is the structural diagram of the leaching box of the contaminated soil graded acid washing and regeneration device.

[0024] Figure 6 This is a cross-sectional structural diagram of the leaching box of the contaminated soil graded acid washing and regeneration device.

[0025] Figure 7 This is a cross-sectional structural diagram from another perspective of the leaching box of the contaminated soil graded acid washing and regeneration device.

[0026] Figure 8 A graded acid washing and regeneration device for contaminated soil Figure 7 Enlarged view of the local structure at point C in the middle.

[0027] Figure 9 This is a structural diagram of the connection between the fixed ring and the drive gear of the contaminated soil graded pickling and regeneration device.

[0028] Figure 10 This is a cross-sectional structural diagram of the lifting sleeve of the contaminated soil graded pickling and regeneration device.

[0029] Figure 11 A graded acid washing and regeneration device for contaminated soil Figure 10 Enlarged view of the local structure at point D in the middle. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0033] Example 1, with reference to Figures 1 to 11 , which is the first embodiment of the present invention, provides a contaminated soil graded acid washing and regeneration device, which includes a washing assembly 100, including a support body 101, a support base 102, a discharge pipe 103, a discharge funnel 104, a filter plate 105, a mixing box 106, a water inlet pipe 107, a chemical pipe 108, a delivery pipe 109 and a washing box 110. The support base 102 is fixed to the bottom of the support body 101, the discharge pipe 103, the discharge funnel 104, the filter plate 105, the mixing box 106, the water inlet pipe 107, the chemical pipe 108, the delivery pipe 109 and the washing box 110. 103 is fixed in the support body 101, the discharge funnel 104 is fixed on the top of the discharge pipe 103, the filter plate 105 is fixed in the discharge funnel 104, the mixing box 106 is arranged on the top of the support body 101, the water inlet pipe 107 and the drug pipe 108 are both fixed on the top of the mixing box 106, the delivery pipe 109 is fixed on one side of the mixing box 106, and the other end of the delivery pipe 109 is fixed in the discharge pipe 103, and the washing box 110 is rotatably connected to the support body 101.

[0034] The support base 102 is used to support the support body 101. The contaminated soil can enter the discharge pipe 103 through the discharge funnel 104. At this time, the filter plate 105 can filter large debris. The water inlet pipe 107 and the reagent pipe 108 are used to transport clean water and acid reagent to the mixing box 106 respectively. The mixing box 106 is used to mix the clean water and the acid reagent. The mixed solution is the eluent, which is transported to the discharge pipe 103 through the delivery pipe 109, so that the eluent and the contaminated soil are separated. At this time, the eluent can prevent the contaminated soil from accumulating at the bend of the discharge pipe 103, and can flush the soil there, so that the eluent and the contaminated soil fall into the eluent box 110 together. The rotation of the eluent box 110 makes the soil and the eluent fully mixed. The eluent is based on the chemical reaction between the acid and the pollutants in the soil, and removes the pollutants from the soil through the mechanisms of dissolution, complexation and acid-base neutralization, thereby restoring the ecological function and utilization value of the soil.

[0035] The mixing assembly 200 is arranged on the support body 101 and includes a support sleeve 201a fixed in the rinsing box 110. The support sleeve 201a is rotatably connected to a rotating shaft 201b. A limit plate 201c is fixed to the end of the rotating shaft 201b. A lifting sleeve 201d slides on the surface of the limit plate 201c. A first spring 201e is sleeved on the surface of the rotating shaft 201b. A sliding groove 201b-1 is opened on the surface of the rotating shaft 201b. A lifting sleeve 201d is fixed in the lifting sleeve 201d. Limiting bar 201f, the limiting bar 201f slides in the slide groove 201b-1, a connecting sleeve 201g is fixed on the surface of the lifting sleeve 201d, a mixing grid 201h is provided at the end of the lifting sleeve 201d, the connecting sleeve 201g is fixed to the surface of the mixing grid 201h by bolts, a mounting ring 201i is fixed on the surface of the lifting sleeve 201d, a breaking rod 201j is fixed on the surface of the mounting ring 201i, and a breaking hook 201k is fixed at the end of the breaking rod 201j.

[0036] The support sleeve 201a is used to support the rotating shaft 201b so that the rotating shaft 201b can rotate stably and the rotating shaft 201b will not move axially in the support sleeve 201a. A sealing mechanism is provided at the connection between the support sleeve 201a and the rotating shaft 201b to prevent leakage of the eluent. The limiting plate 201c is used to support the first spring 201e. The first spring 201e is in a compressed state and slides in the slide groove 201b-1 through the limiting strip 201f, so that the rotating shaft 201b The lifting sleeve 201d is driven to rotate synchronously, so that the lifting sleeve 201d can drive the mixing grid 201h to rotate. A plurality of through holes are provided on the surface of the mixing grid 201h, which can squeeze and crush the soil entering one side of the mixing grid 201h. When encountering small stones, the mixing grid 201h can squeeze the first spring 201e through the lifting sleeve 201d, so that the mixing grid 201h is away from the inner wall of the washing box 110, so that the stones can pass through, so that the mixing grid 201h will not be stuck by the stones.

[0037] When the lifting sleeve 201d rotates, the mounting ring 201i can be driven to rotate, so that the crushing rod 201j and the crushing hook 201k on one side of the mounting ring 201i rotate, thereby crushing large pieces of soil, making it easier for the mixing grid 201h to crush small pieces of soil into finer pieces, thereby improving the mixing efficiency of the soil and the washing liquid.

[0038] Specifically, the mixing assembly 200 also includes a driving member 202, which is arranged in the support body 101 and includes a fixed ring 202a fixed in the support body 101, a tooth 202b fixed on one side of the fixed ring 202a, and a driving gear 202c fixed on the surface of the rotating shaft 201b, and the driving gear 202c is meshed with the tooth 202b.

[0039] There are multiple fixing rings 202a, which are used to fix the teeth 202b, so that the teeth 202b drive the driving gear 202c to rotate, so that the driving gear 202c drives the rotating shaft 201b to rotate. There are multiple driving gears 202c on one side of the fixing ring 202a, which drive multiple rotating shafts 201b to rotate.

[0040] Specifically, the mixing assembly 200 also includes a protective part 203, which is arranged in the elution box 110, including a support rod 203a fixed to the inner wall of the elution box 110, and a protective cover 203b is fixed to the other end of the support rod 203a. The cross-section of the protective cover 203b is an inverted "V" shape, and there are multiple support rods 203a fixed on the surface of the protective cover 203b.

[0041] By setting the support rod 203a, the protective cover 203b can be fixedly supported, so that the protective cover 203b can protect the crushing rod 201j and the mixing grid 201h, preventing the soil falling at the outlet of the discharge pipe 103 from directly falling on the crushing rod 201j and the mixing grid 201h, thereby improving the service life of the crushing rod 201j and the mixing grid 201h.

[0042] Specifically, the mixing assembly 200 further includes a guide plate 204 fixed in the rinsing box 110 , and the rinsing box 110 is provided with a water storage tank 110 - 1 .

[0043] There are two water storage tanks 110-1 for storing eluent, so that the eluent in the eluent box 110 can be collected here, so that the soil and the eluent can be better mixed, and the eluent will not flow out of the eluent box 110 before mixing with the soil, thereby saving the eluent. The setting of the guide plate 204 can transport the mixed soil to the outside of the eluent box 110, at which time the mixed soil is in a fluid state.

[0044] Specifically, the mixing assembly 200 further includes a power member 205 , which is disposed on the support body 101 and includes a fixing seat 205 a fixed to the inner wall of the support body 101 , a gear ring 205 b is rotatably connected to the fixing seat 205 a , and the gear ring 205 b is fixed to the surface of the elution box 110 .

[0045] The fixed seat 205a is used to support the gear ring 205b so that the gear ring 205b can rotate stably in the fixed seat 205a. By driving the gear ring 205b to rotate, the elution box 110 can be driven to rotate, thereby causing the elution box 110 to rotate in the support body 101, and a support wheel is provided between the support body 101 and the elution box 110, so that the elution box 110 can rotate stably in the support body 101.

[0046] Example 2, reference Figures 1 to 11 , which is the second embodiment of the present invention, and is based on the previous embodiment.

[0047] Specifically, the power component 205 further includes a support shell 205c fixed to the surface of the support body 101, a support shaft 205d is rotatably connected inside the support shell 205c, a rotating gear 205e is fixed on the surface of the support shaft 205d, and the rotating gear 205e is meshed with the gear ring 205b.

[0048] The supporting shell 205c is used to support the supporting shaft 205d, so that the supporting shaft 205d can stably support the rotating gear 205e, thereby enabling the rotating gear 205e to drive the gear ring 205b to rotate.

[0049] Specifically, the power part 205 also includes a worm gear 205f fixed on the surface of the support shaft 205d, a drive rod 205g is rotatably connected in the support shell 205c, a worm 205h is fixed on the surface of the drive rod 205g, a drive motor 205i is provided on one side of the support shell 205c, and the end of the drive rod 205g is located on the output end surface of the drive motor 205i.

[0050] The worm wheel 205f and the worm 205h are engaged. Starting the drive motor 205i can drive the drive rod 205g at the output end to rotate, so that the drive rod 205g drives the worm 205h to rotate, thereby driving the worm wheel 205f to rotate, so that the worm wheel 205f drives the support shaft 205d to rotate, so that the support shaft 205d drives the gear ring 205b to rotate through the rotating gear 205e, thereby driving the washing box 110 to rotate in the support body 101.

[0051] Specifically, the end of the discharge pipe 103 is open.

[0052] The open end of the feed pipe 103 can prevent the soil and elution liquid mixture flowing out of the end of the feed pipe 103 from flowing along the bottom of the feed pipe 103 to the area between the support body 101 and the elution box 110.

[0053] Specifically, the end of the conveying pipe 109 is located in the vertical section of the discharge pipe 103 .

[0054] The delivery pipe 109 is located in the vertical section of the discharge pipe 103, so that the eluent delivered by the delivery pipe 109 can flush the soil in the discharge pipe 103, thereby preventing the soil in the discharge pipe 103 from piling up in its bending section.

[0055] Specifically, a stirring mechanism is provided in the liquid mixing box 106 .

[0056] The stirring mechanism provided in the mixing box 106 can mix the medicine and clean water entering the mixing box 106, so that the evenly mixed eluent is discharged from the delivery pipe 109. The above stirring mechanism is a prior art and will not be described in detail here.

[0057] In summary, the present invention has the following beneficial effects:

[0058] 1. The mixing grid 201h allows the soil and the elution liquid to contact and mix more efficiently and fully, thereby improving the elution efficiency. The lifting design of the mixing grid 201h prevents the mixing grid 201h from being easily squeezed and deformed by small stones, thereby increasing the service life of the mixing grid 201h.

[0059] 2. The design of the water storage tank 110-1 allows the eluent in the eluent box 110 to be collected there, thereby better mixing the soil and eluent. The eluent will not flow out of the eluent box 110 before mixing with the soil. This saves the use of eluent and clean water. By reducing the amount of eluent used and the discharge of wastewater, it also reduces wastewater treatment costs and environmental impact.

[0060] 3. By improving the mixing efficiency, the mixing distance of soil and eluent can be shortened, and the volume of the entire device can be reduced, thereby reducing the floor space and transportation costs.

[0061] During use, first start the drive motor 205i, and add the contaminated soil into the discharge pipe 103 through the discharge funnel 104. At this time, the filter plate 105 can filter large debris, and the eluent delivered by the delivery pipe 109 can make the eluent and contaminated soil in the discharge pipe 103 fall into the washing box 110 together. At this time, the eluent and contaminated soil will fall into the water storage tank 110-1 near the outlet of the discharge pipe 103, because the drive motor 205i has been started.

[0062] The driving motor 205i can drive the driving rod 205g at the output end to rotate, so that the driving rod 205g drives the worm 205h to rotate, thereby driving the worm wheel 205f to rotate, so that the worm wheel 205f drives the support shaft 205d to rotate, so that the support shaft 205d drives the gear ring 205b to rotate through the rotating gear 205e, thereby driving the elution box 110 to rotate in the support body 101. When the elution box 110 rotates, the driving gear 202c can be rotated. One side of the fixed ring 202a moves, so that the teeth 202b drive the driving gear 202c to rotate, so that the driving gear 202c drives the rotating shaft 201b to rotate, and the rotating shaft 201b can drive the lifting sleeve 201d to rotate synchronously through the limit bar 201f, so that the lifting sleeve 201d drives the mounting ring 201i to rotate, so that the breaking rod 201j and the breaking hook 201k on one side of the mounting ring 201i rotate, thereby breaking large pieces of soil.

[0063] The soil broken into small pieces falls into the water storage tank 110-1. As the lifting sleeve 201d drives the mixing grid 201h to rotate, the mixing grid 201h can crush the soil broken into small pieces, thereby improving the mixing efficiency of the soil and the eluent. At the same time, since a large amount of eluent is collected in the water storage tank 110-1, the soil can be easily washed by the eluent, and the soil becomes a fluid state without the need for the delivery pipe 109 to deliver a large amount of eluent, thereby avoiding waste of eluent. At this time, the soil that has become a fluid state can move to the outside of the elution box 110 under the guidance of the guide plate 204 as the elution box 110 rotates, thereby causing the soil in the fluid state to move to the next water storage tank 110-1, so that the mixing grid 201h in the water storage tank 110-1 can crush the soil in the fluid state more finely again, thereby improving the mixing effect of the soil and the eluent.

[0064] The fluid soil that has been crushed and compacted twice is moved out of the washing box 110 under the guidance of the guide plate 204.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A contaminated soil graded acid washing and regeneration device, characterized by: include, The rinsing assembly (100) comprises a support body (101), a support seat (102), a discharge pipe (103), a discharge funnel (104), a filter plate (105), a liquid mixing box (106), a water inlet pipe (107), a reagent pipe (108), a delivery pipe (109) and a rinsing box (110), wherein the support seat (102) is fixed to the bottom of the support body (101), the discharge pipe (103) is fixed in the support body (101), and the discharge funnel (104) is fixed to the discharge pipe (110). 03) top, the filter plate (105) is fixed in the discharge funnel (104), the mixed liquid box (106) is arranged on the top of the support body (101), the water inlet pipe (107) and the reagent pipe (108) are both fixed on the top of the mixed liquid box (106), the delivery pipe (109) is fixed on one side of the mixed liquid box (106), the other end of the delivery pipe (109) is fixed in the discharge pipe (103), and the rinsing box (110) is rotatably connected in the support body (101); The mixing assembly (200) is arranged on the support body (101), and comprises a support sleeve (201a) fixed in the washing box (110); a rotating shaft (201b) is rotatably connected in the support sleeve (201a); a limit plate (201c) is fixed at the end of the rotating shaft (201b); a lifting sleeve (201d) is slidably provided on the surface of the limit plate (201c); a first spring (201e) is sleeved on the surface of the rotating shaft (201b); a sliding groove (201b-1) is provided on the surface of the rotating shaft (201b); a limit plate (201c) is fixed in the lifting sleeve (201d); A positioning bar (201f) is provided, wherein the limiting bar (201f) slides in the sliding groove (201b-1); a connecting sleeve (201g) is fixed on the surface of the lifting sleeve (201d); a mixing grid plate (201h) is provided at the end of the lifting sleeve (201d); the connecting sleeve (201g) is fixed to the surface of the mixing grid plate (201h) by bolts; a mounting ring (201i) is fixed on the surface of the lifting sleeve (201d); a crushing rod (201j) is fixed on the surface of the mounting ring (201i); and a crushing hook (201k) is fixed at the end of the crushing rod (201j); The surface of the mixing grid (201h) is provided with a plurality of through holes, which squeeze and crush the soil entering one side of the mixing grid (201h). When encountering small stones, the mixing grid (201h) squeezes the first spring (201e) through the lifting sleeve (201d), so that the mixing grid (201h) is away from the inner wall of the washing box (110), thereby allowing the stones to pass through and preventing the mixing grid (201h) from being stuck.

2. The contaminated soil graded acid washing and regeneration device according to claim 1, characterized in that: The mixing assembly (200) further comprises a driving member (202), which is arranged in the support body (101) and comprises a fixing ring (202a) fixed in the support body (101), wherein teeth (202b) are fixed on one side of the fixing ring (202a), and a driving gear (202c) is fixed on the surface of the rotating shaft (201b), and the driving gear (202c) is meshed with the teeth (202b).

3. The contaminated soil graded acid washing and regeneration device according to claim 2, characterized in that: The mixing assembly (200) further includes a protective member (203), which is arranged in the rinsing box (110) and includes a support rod (203a) fixed to the inner wall of the rinsing box (110), and a protective cover (203b) is fixed to the other end of the support rod (203a). The cross-section of the protective cover (203b) is an inverted "V" shape, and there are multiple support rods (203a) fixed on the surface of the protective cover (203b).

4. The contaminated soil graded acid washing and regeneration device according to claim 3, characterized in that: The mixing assembly (200) further includes a guide plate (204) fixed in the rinsing box (110), and a water storage tank (110-1) is provided in the rinsing box (110).

5. The contaminated soil graded acid washing and regeneration device according to claim 3 or 4, characterized in that: The mixing assembly (200) further includes a power part (205), which is arranged on the support body (101) and includes a fixed seat (205a) fixed to the inner wall of the support body (101), and a gear ring (205b) is rotatably connected inside the fixed seat (205a), and the gear ring (205b) is fixed to the surface of the washing box (110).

6. The contaminated soil graded acid washing and regeneration device according to claim 5, characterized in that: The power member (205) further comprises a support shell (205c) fixed to the surface of the support body (101), a support shaft (205d) being rotatably connected in the support shell (205c), a rotating gear (205e) being fixed to the surface of the support shaft (205d), and the rotating gear (205e) being meshed with the gear ring (205b).

7. The contaminated soil graded acid washing and regeneration device according to claim 6, characterized in that: The power member (205) further includes a worm gear (205f) fixed to the surface of the support shaft (205d); a driving rod (205g) is rotatably connected in the support shell (205c); a worm (205h) is fixed to the surface of the driving rod (205g); a driving motor (205i) is provided on one side of the support shell (205c); and an end of the driving rod (205g) is located on the output end surface of the driving motor (205i).

8. The contaminated soil graded acid washing and regeneration device according to claim 7, characterized in that: The end of the discharge pipe (103) is open.

9. The contaminated soil graded acid washing and regeneration device according to claim 8, characterized in that: The end of the conveying pipe (109) is located in the vertical section of the discharge pipe (103).

10. The contaminated soil graded acid washing and regeneration device according to claim 9, characterized in that: A stirring mechanism is provided in the liquid mixing box (106).

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