Heavy metal contaminated soil leaching device

Abstract

The utility model discloses a heavy metal contaminated soil leaching device which comprises a leaching mechanism, a turnover mechanism and a circulating system. The drip washing mechanism comprises a base, a drip washing box arranged on the base, a water inlet box arranged on the drip washing box, a movable plate piece arranged below the drip washing box, a drip washing barrel detachably installed on the movable plate piece, a stirring mechanism arranged on the rear portion of the interior of the drip washing box, a spray washing mechanism arranged above the drip washing box and a detection mechanism. The turnover mechanism comprises a rotating assembly arranged on the base, a first electric sliding rail arranged on the rotating assembly and a clamping mechanism arranged on the first electric sliding rail, and the circulating system comprises an electrolysis device and an adjusting tank which are arranged on the base. According to the heavy metal contaminated soil remediation device, remediation of heavy metal contaminated soil is achieved through cyclic utilization of leacheate, water resources and chemicals are effectively saved, remediation efficiency is improved, the cleaning process is simplified through the automatic dumping mechanism, and manpower and time cost is saved.

Description

Technical Field

[0001] The utility model belongs to the field of contaminated soil restoration, and in particular relates to a heavy metal contaminated soil leaching device. Background Art

[0002] Heavy metal contaminated soil refers to the presence of heavy metal elements in the soil that exceed the environmental allowable value, such as lead, cadmium, mercury, etc. These heavy metals come from the discharge of industrial wastewater, waste, pesticides, fertilizers, etc., posing a serious threat to the soil ecosystem and human health.

[0003] In order to reduce the impact of heavy metal contaminated soil on the environment and humans, effective treatment measures need to be taken. One of them is soil leaching technology, which dissolves the heavy metal elements in the soil and transfers them into the washing liquid through leaching, thereby achieving the purpose of reducing the degree of soil pollution.

[0004] However, the existing soil washing device still has some shortcomings: the existing device lacks the recycling of the washing liquid, which will waste a lot of water resources and chemical agents, which not only increases the cost but also easily causes environmental pollution. In addition, the existing device does not adopt an automated dumping mechanism, which affects the work efficiency and processing progress of the staff.

[0005] Therefore, the utility model provides a heavy metal contaminated soil leaching device. Utility Model Content

[0006] In order to solve the above technical problems, the utility model designs a heavy metal contaminated soil leaching device to solve the problems existing in the above background technology.

[0007] In order to achieve the above technical effects, the utility model is implemented through the following technical solutions: a heavy metal contaminated soil elution device, including an elution mechanism, a turnover mechanism and a circulation system.

[0008] Furthermore, the rinsing mechanism includes a base, a rinsing box arranged on the base, a water inlet tank arranged on the rinsing box, a movable plate arranged under the rinsing box, a rinsing cylinder disassembled and installed on the movable plate, a stirring mechanism arranged at the rear of the interior of the rinsing box, a spraying mechanism and a detection mechanism arranged above the rinsing box; the flipping mechanism includes a rotating assembly arranged on the base, a first electric slide rail arranged on the rotating assembly, and a clamping mechanism arranged on the first electric slide rail; the circulation system includes an electrolysis device and a regulating tank arranged on the base.

[0009] Furthermore, a filter box is provided below the rinsing box, a through hole is provided at the upper end of the filter box, and the rinsing box is slidably connected to a box door.

[0010] Furthermore, liquid inlet channels are provided on both sides of the water inlet tank, one side of the liquid inlet channel is externally connected to a rinse liquid barrel, a liquid level sensor is provided at the rear of the water inlet tank, and the liquid level sensor is electrically connected to the central control platform.

[0011] Furthermore, the movable plate includes a second electric slide rail arranged in grooves on both sides of the upper end of the filter box, a support plate fixedly connected to the second electric slide rail, and a retaining ring arranged on the support plate, and the support plate is provided with a plate hole matching the through hole of the filter box, and the second electric slide rail is electrically connected to the central control platform.

[0012] Furthermore, a filter layer is provided at the bottom of the elution cartridge, and the filter layer is an annular structure and has a diameter smaller than the diameters of the through holes and the plate holes.

[0013] Furthermore, the stirring mechanism includes an electric cylinder fixedly connected to the rear of the washing box, a suspension fixedly connected to the telescopic end of the electric cylinder, a first motor fixedly connected to the front end of the suspension, and a stirring rod fixedly connected to the output shaft of the first motor, and the first motor is electrically connected to the central control platform.

[0014] Furthermore, the spraying mechanism includes a first liquid pump arranged at the upper end of the interior of the rinsing box, a liquid outlet main pipe fixedly connected to the liquid outlet of the first liquid pump, and a plurality of universal liquid spray pipes evenly fixed around the liquid outlet main pipe, and the liquid inlet of the first liquid pump passes through the top of the rinsing box and extends to the bottom of the water inlet tank; the detection mechanism includes an electric telescopic rod fixedly connected to the upper end of the interior of the rinsing box and located on one side of the first liquid pump, and a metal detector fixedly connected to the lower end of the electric telescopic rod, and the first liquid pump, the electric telescopic rod, the metal detector, and the first motor are electrically connected to the central control platform.

[0015] Furthermore, the rotating assembly includes a pair of support seats arranged on the base and located in front of the washing box, a rotating shaft rotatably installed between the support seats, a second motor fixedly connected to the base and arranged on one side of the rotating shaft, and a fixed plate fixedly connected to the rotating shaft, the output shaft of the second motor is fixedly connected to one end of the rotating shaft, and fixed blocks are provided on both sides below the fixed plate and fixedly connected to the rotating shaft; first electric slide rails are provided on both sides above the fixed plate, and the second motor is electrically connected to the central control platform.

[0016] Furthermore, the clamping mechanism includes a connecting block fixedly connected to the first electric slide rail, a guide rod rotatably installed on both sides of the connecting blocks, a forward and reverse screw rod rotatably installed between the connecting blocks, a guide block cooperatedly installed on both sides of the guide rod, a sliding block cooperatedly installed on both sides of the forward and reverse screw rod, a third motor fixedly connected to the outside of the connecting block at one end, a clamping plate fixedly connected to the upper end of the guide block and the sliding block, and a baffle arranged on the clamping plate, one end of the forward and reverse screw rod is fixedly connected to the output shaft of the third motor, and the third motor is electrically connected to the central control platform.

[0017] Furthermore, the pipe hole at the bottom side of the filter box is connected to the liquid inlet pipe port of the second liquid pump arranged on the base, the liquid outlet pipe port at the other end of the second liquid pump is connected to the liquid inlet port on one side of the electrolysis device through the first liquid pipe, the liquid outlet port on the other side of the electrolysis device is connected to the liquid inlet pipe port of the third liquid pump, the liquid outlet pipe port at the other end of the third liquid pump is connected to the tank hole on one side of the regulating tank through the second liquid pipe, the upper end of the regulating tank is rotatably connected to the tank cover, and a fourth liquid pump is provided at the upper end of the regulating tank, the liquid inlet pipe of the fourth liquid pump extends to the inside of the regulating tank, and the liquid inlet pipe port of the fourth liquid pump is connected to the liquid inlet channel on the other side of the water inlet tank through the third liquid pipe, and the second liquid pump, the electrolysis device, the third liquid pump, the fourth liquid pump and the central control platform are electrically connected.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model effectively saves water resources and the use of chemicals through the steps of leaching soil, electrolytic treatment and recycling of leaching liquid, which helps to reduce the cost of restoration and reduce the impact on the environment;

[0020] 2. The utility model can efficiently repair soil contaminated by heavy metals. Through the control of the central control platform, the entire repair process can be automated and intelligent; sensing devices such as liquid level sensors and metal detectors can monitor the treatment process in real time to ensure that each step is carried out under the correct conditions;

[0021] 3. The utility model uses an automated dumping mechanism so that workers can easily dump the soil in the leaching cylinder, thereby facilitating cleaning and maintenance work; such a design greatly simplifies the cleaning process and saves manpower and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the overall internal structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the front section of the utility model;

[0026] Figure 4 This utility model Figure 3A schematic diagram of the structure enlargement in the middle;

[0027] Figure 5 It is a partial schematic diagram of the side section structure of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the turning mechanism of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the turning mechanism of the utility model after turning over;

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. rinsing mechanism; 11. base; 12. rinsing box; 121. filter box; 122. box door; 13. moving plate; 131. second electric slide rail; 132. support plate; 133. retaining ring; 14. rinsing cylinder; 141. filter layer; 15. stirring mechanism; 151. electric cylinder; 152. suspension; 153. first motor; 154. stirring rod; 16. spraying mechanism; 161. first liquid pump; 162. liquid outlet main pipe; 163. universal liquid spray pipe; 17. detection mechanism; 171. electric telescopic rod; 172. metal detector; 18. water inlet tank; 181. liquid Position sensor; 2. Flipping mechanism; 21. Rotating assembly; 211. Support seat; 212. Rotating shaft; 213. Second motor; 214. Fixed plate; 22. First electric slide rail; 23. Clamping mechanism; 231. Connecting block; 232. Guide rod; 233. Forward and reverse screw rod; 234. Guide block; 235. Sliding block; 236. Third motor; 237. Clamping plate; 238. Baffle; 3. Circulation system; 31. Electrolysis device; 32. Adjusting tank; 4. Second liquid pump; 41. First liquid pipe; 5. Third liquid pump; 51. Second liquid pipe; 6. Fourth liquid pump; 61. Third liquid pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] See also Figures 1 to 7As shown, a heavy metal contaminated soil elution device includes a elution mechanism 1, a flip mechanism 2 and a circulation system 3, characterized in that: the elution mechanism 1 includes a base 11, a elution box 12 arranged on the base 11, a water inlet box 18 arranged on the elution box 12, a movable plate 13 arranged below the elution box 12, a elution cylinder 14 detachably mounted on the movable plate 13, a stirring mechanism 15 arranged at the rear inside the elution box 12, a spraying mechanism 16 and a detection mechanism 17 arranged above the elution box 12; the flip mechanism 2 includes a rotating assembly 21 arranged on the base 11, a first electric slide rail 22 arranged on the rotating assembly 21, and a clamping mechanism 23 arranged on the first electric slide rail 22; the circulation system 3 includes an electrolysis device 31 and a regulating tank 32 arranged on the base 11.

[0035] A filter box 121 is provided below the rinsing box 12, and a through hole is provided at the upper end of the filter box 121. The rinsing box 12 is slidably connected to a box door 122. A slide groove is provided on the upper and lower end surfaces of the rinsing box 12, and a slider matching the slide groove is provided on the box door 122 to realize the horizontal opening and closing of the box door 122 in the rinsing box 12.

[0036] Liquid inlet channels are provided on both sides of the water inlet tank 18, one side of the liquid inlet channel is externally connected to a rinse liquid barrel, and a liquid level sensor 181 is provided at the rear of the water inlet tank 18, and the liquid level sensor 181 is electrically connected to the central control platform.

[0037] The movable plate 13 includes a second electric slide rail 131 arranged at the grooves on both sides of the upper end of the filter box 121, a support plate 132 fixedly connected to the second electric slide rail 131, and a retaining ring 133 arranged on the support plate 132. The support plate 132 is provided with a plate hole matching the through hole of the filter box 121. The electric slider on the second electric slide rail 131 is fixedly connected to the support plate 132, and the second electric slide rail 131 is electrically connected to the central control platform.

[0038] A filter layer 141 is disposed at the bottom of the elution cartridge 14 . The filter layer 141 is an annular structure and has a diameter smaller than the diameters of the through holes and the plate holes.

[0039] The stirring mechanism 15 includes an electric cylinder 151 fixedly connected to the rear of the washing box 12, a suspension 152 fixedly connected above the telescopic end of the electric cylinder 151, a first motor 153 fixedly connected to the front end of the suspension 152, and a stirring rod 154 fixedly connected to the output shaft of the first motor 153. The first motor 153 is electrically connected to the central control platform.

[0040] The spraying mechanism 16 includes a first liquid pump 161 arranged at the upper end of the rinsing box 12, a liquid outlet main pipe 162 fixedly connected to the liquid outlet of the first liquid pump 161, and a plurality of universal liquid spray pipes 163 uniformly fixed around the liquid outlet main pipe 162, wherein the universal liquid spray pipe 163 is composed of a universal liquid pipe and a high-pressure nozzle, and the liquid inlet of the first liquid pump 161 passes through the top of the rinsing box 12 and extends to the bottom of the water inlet tank 18; the detection mechanism 17 includes an electric telescopic rod 171 fixedly connected to the upper end of the rinsing box 12 and located on one side of the first liquid pump 161, and a metal detector 172 fixedly connected to the lower end of the electric telescopic rod 171, wherein the metal detector 172 is an X-ray fluorescence spectrometer, and the detection end of the X-ray fluorescence spectrometer is placed close to the soil for a period of time, so as to detect the contents of various common metal elements in the soil. When using the X-ray fluorescence spectrometer, it is usually necessary to stick a transparent film on the detection surface of the X-ray fluorescence spectrometer to prevent the soil from adhering to the detection surface and being difficult to clean, thereby affecting the subsequent detection effect. The first liquid pump 161 , the electric telescopic rod 171 , the metal detector 172 , and the first motor 153 are electrically connected to the central control platform.

[0041] The rotating assembly 21 includes a pair of support seats 211 arranged on the base 11 and located in front of the washing box 12, a rotating shaft 212 rotatably installed between the support seats 211 through a bearing seat, a second motor 213 fixedly connected to the base 11 and arranged on one side of the rotating shaft 212, and a fixed plate 214 fixedly connected to the rotating shaft 212, wherein the output shaft of the second motor 213 is fixedly connected to one end of the rotating shaft 212 through a sleeve, and fixed blocks are provided on both sides below the fixed plate 214 and fixedly connected to the rotating shaft 212; first electric slide rails 22 are provided on both sides above the fixed plate 214, and the second motor 213 is electrically connected to the central control platform.

[0042] The clamping mechanism 23 includes a connecting block 231 fixedly connected to the first electric slide rail 22, a guide rod 232 rotatably installed on both sides of the connecting block 231 through a bearing seat, a positive and negative threaded rod 233 rotatably installed between the connecting blocks 231 through a bearing seat, a guide block 234 mounted on both sides of the guide rod 232, a sliding block 235 mounted on both sides of the positive and negative threaded rod 233, a third motor 236 fixedly connected to the outer side of the connecting block at one end, a clamping plate 237 fixedly connected to the upper ends of the guide block 234 and the sliding block 235, and a baffle 238 arranged on the clamping plate 237, one end of the positive and negative threaded rod 233 is fixedly connected to the output shaft of the third motor 236 through a sleeve, and the third motor 236 is electrically connected to the central control platform.

[0043] The pipe hole at the bottom side of the filter box 121 is connected to the liquid inlet pipe of the second liquid pump 4 arranged on the base 11, the liquid outlet pipe at the other end of the second liquid pump 4 is connected to the liquid inlet on one side of the electrolysis device 31 through the first liquid pipe 41, the liquid outlet on the other side of the electrolysis device 31 is connected to the liquid inlet pipe of the third liquid pump 5, the liquid outlet pipe at the other end of the third liquid pump 5 is connected to the tank hole on one side of the regulating tank 32 through the second liquid pipe 51, the upper end of the regulating tank 32 is rotatably connected to the tank cover, the upper end of the regulating tank 32 is provided with a fourth liquid pump 6, the liquid inlet pipe of the fourth liquid pump 6 extends to the inside of the regulating tank 32, and the liquid inlet pipe of the fourth liquid pump 6 is connected to the liquid inlet channel on the other side of the water inlet tank 18 through the third liquid pipe 61, the second liquid pump 4, the electrolysis device 31, the third liquid pump 5, the fourth liquid pump 6 are electrically connected to the central control platform.

[0044] In addition, the bottom end of the regulating tank 32 is also provided with a drainage channel, and the outer end of the drainage channel is spirally connected to a sealing cover.

[0045] Example 2

[0046] The operating principle of the utility model:

[0047] This device is used for ex situ leaching and remediation of heavy metal contaminated soil. When leaching heavy metal soil, the operator first moves the box door 122 to open it, and then controls the central control platform near the device to make the second electric slide rail 131 drive the support plate 132 to move the leaching cylinder 14 to the front end of the device, and then puts the contaminated soil to be remediated into the leaching cylinder 14.

[0048] Then the second electric slide rail 131 returns to reset the elution barrel 14, and then the operator closes the box door 122. Then, through the control of the central control platform, the water pump of the external elution barrel is started, and the elution liquid with a certain concentration of elution agent added is injected into the water inlet tank 18 through the pipeline. The operator controls the required volume of the elution liquid by the amount of contaminated soil in the elution barrel 14. The water inlet tank 18 is provided with a liquid level sensor 181. When the amount of elution liquid reaches the set value, the liquid level sensor 181 will feed back the relevant electrical signal to the central control platform, and then the central control platform controls the water pump of the elution barrel to turn off. When the elution liquid in the water inlet tank 18 is injected, the central control platform controls the telescopic end of the electric cylinder 151 to retract, and at the same time, the first motor 153 starts to drive the stirring rod 154 to rotate. The central control platform controls the first liquid pump 161 to start, and the first liquid pump 161 extracts the eluent in the water inlet tank 18, and evenly sprays it into the elution barrel 14 through the multiple universal liquid spray pipes 163 around the liquid outlet main pipe 162, so that the soil in the elution barrel 14 is sprayed with the eluent and stirred at the same time. When the eluent in the water inlet tank 18 completely enters the elution barrel 14 and is stirred for a period of time by the stirring rod 154, the contaminated soil and the eluent are fused in this process, and the eluent washes out most of the heavy metal elements in the contaminated soil, and the waste liquid formed enters the filter box 121 from the filter layer 141 at the bottom of the elution barrel 14.

[0049] The central control platform controls the second liquid pump 4 to pump the waste liquid in the filter box 121 into the electrolysis device 31 for electrolysis. The positively and negatively charged ions will migrate to the anode and cathode respectively. During the migration process, some pollutants are removed in the form of precipitation, and some positively charged valuable metals will be deposited at the cathode. After the electrolysis is completed, it is left to stand for a period of time. The standing time is set by the central control platform.

[0050] At the same time, after the elution waste liquid in the elution cylinder 14 is filtered, the central control platform controls the electric cylinder 151 to stretch, the first motor 153 stops rotating, the stirring rod 154 is moved out of the elution cylinder 14, and the electric telescopic rod 171 is extended into the elution cylinder 14, so that the metal detector 172 contacts the soil, and then the metal detector 172 feeds back the metal element monitoring data in the soil to the central control system, and the operator judges whether the metal content in the soil is reduced to the corresponding standard through the detection data. A pressure sensor or a distance sensor can be set on the detection head of the metal detector 172, so that after the detection head of the metal detector 172 contacts the soil, the sensor transmits the relevant signal to the central control system, thereby controlling the stroke of the electric telescopic rod 171. After the metal detector 172 completes the detection, the electric telescopic rod 171 is reset.

[0051] Then the central control platform controls the third liquid pump 5 to start pumping the electrolyzed liquid in the electrolysis device 31 into the regulating tank 32. The inspector opens the tank cover at the upper end of the regulating tank 32 to inspect the electrolyzed liquid to determine whether the eluent content in the electrolyzed liquid is still within the specified range. If the eluent concentration is insufficient, a certain concentration of eluent needs to be prepared and added to the regulating tank 32.

[0052] After the eluent in the regulating tank 32 is regulated, the fourth liquid pump 6 can be controlled to extract the eluent in the regulating tank 32 and inject it into the water inlet tank 18 through the third liquid pipe 61. The liquid level sensor 181 will detect the volume of the eluent in the water inlet tank 18. If the volume of the eluent is insufficient, the central control platform will automatically extract new eluent from the eluent barrel to add it to the water inlet tank 18 to prepare for the next soil elution. The soil remediation is not completed until the metal detector 172 detects that the metal content in the soil is within the corresponding standard.

[0053] Open the box door 122, and the clamping plate 237 of the clamping mechanism 23 is in an open state. The second electric slide rail 131 drives the support plate 132 to move the elution cylinder 14 to the outer front end of the knife device. Then the third motor 236 is controlled and started by the central control platform, driving the positive and negative screws 233 to rotate. The rotation of the positive and negative screws causes the sliding blocks 235 and the guide blocks 234 on both sides to drive the clamping plates 237 on both sides to shrink inward at the same time, so that the baffle 238 clamps the elution cylinder 14. Then the second motor 213 rotates to drive the rotating shaft 212 to rotate, so that the fixed plate 214 rotates and then drives the elution cylinder 14 on the clamping mechanism 23 to flip, so that the soil in the elution cylinder 14 is dumped out, and it is convenient for the staff to clean the elution cylinder 14.

[0054] Finally, the sealing cover of the drainage channel at the bottom of the regulating tank 32 is opened, and the reused eluent in the regulating tank 32 is monitored and then discharged.

Claims

1. A heavy metal contaminated soil elution device, comprising an elution mechanism (1), a turnover mechanism (2) and a circulation system (3), characterized in that: The rinsing mechanism (1) comprises a base (11), a rinsing box (12) arranged on the base (11), a water inlet box (18) arranged on the rinsing box (12), a movable plate (13) arranged below the rinsing box (12), a rinsing cartridge (14) detachably mounted on the movable plate (13), a stirring mechanism (15) arranged at the rear of the rinsing box (12), a spraying mechanism (16) and a detection mechanism (17) arranged above the rinsing box (12); the turning mechanism (2) comprises a rotating assembly (21) arranged on the base (11), a first electric slide rail (22) arranged on the rotating assembly (21), and a clamping mechanism (23) arranged on the first electric slide rail (22); and the circulation system (3) comprises an electrolysis device (31) and a regulating tank (32) arranged on the base (11).

2. A heavy metal contaminated soil leaching device according to claim 1, characterized in that: A filter box (121) is provided below the rinsing box (12), a through hole is provided at the upper end of the filter box (121), and the rinsing box (12) is slidably connected to a box door (122).

3. The heavy metal contaminated soil washing device according to claim 1, characterized in that: Liquid inlet channels are provided on both sides of the water inlet box (18), one side of the liquid inlet channel is externally connected to a rinse liquid barrel, and a liquid level sensor (181) is provided at the rear of the water inlet box (18), and the liquid level sensor (181) is electrically connected to the central control platform.

4. The heavy metal contaminated soil leaching device according to claim 1, characterized in that: The movable plate (13) comprises a second electric slide rail (131) arranged at grooves on both sides of the upper end of the filter box (121), a support plate (132) fixedly connected to the second electric slide rail (131), and a retaining ring (133) arranged on the support plate (132); the support plate (132) is provided with a plate hole matching the through hole of the filter box (121); and the second electric slide rail (131) is electrically connected to the central control platform.

5. The heavy metal contaminated soil leaching device according to claim 1, characterized in that: A filter layer (141) is provided at the bottom of the elution cartridge (14); the filter layer (141) is an annular structure and has a diameter smaller than the diameters of the through holes and the plate holes.

6. A heavy metal contaminated soil leaching device according to claim 1, characterized in that: The stirring mechanism (15) comprises an electric cylinder (151) fixedly connected to the rear of the inside of the washing box (12), a suspension (152) fixedly connected to the top of the telescopic end of the electric cylinder (151), a first motor (153) fixedly connected to the front end of the suspension (152), and a stirring rod (154) fixedly connected to the output shaft of the first motor (153), wherein the first motor (153) is electrically connected to the central control platform.

7. A heavy metal contaminated soil washing device according to claim 1, characterized in that: The spraying mechanism (16) comprises a first liquid pump (161) arranged at the upper end of the interior of the rinsing box (12), a liquid outlet main pipe (162) fixedly connected to the liquid outlet of the first liquid pump (161), and a plurality of universal liquid spraying pipes (163) evenly fixed around the liquid outlet main pipe (162); the liquid inlet of the first liquid pump (161) passes through the top of the rinsing box (12) and extends to the bottom of the water inlet tank (18); the detection mechanism (17) comprises an electric telescopic rod (171) fixedly connected to the upper end of the interior of the rinsing box (12) and located on one side of the first liquid pump (161), and a metal detector (172) fixedly connected to the lower end of the electric telescopic rod (171); the first liquid pump (161), the electric telescopic rod (171), the metal detector (172), and the first motor (153) are electrically connected to the central control platform.

8. The heavy metal contaminated soil leaching device according to claim 1, characterized in that: The rotating assembly (21) comprises a pair of support seats (211) arranged on the base (11) and located in front of the washing box (12), a rotating shaft (212) rotatably installed between the support seats (211), a second motor (213) fixedly connected to the base (11) and arranged on one side of the rotating shaft (212), and a fixing plate (214) fixedly connected to the rotating shaft (212), wherein the output shaft of the second motor (213) is fixedly connected to one end of the rotating shaft (212), and fixing blocks are provided on both sides below the fixing plate (214) and fixedly connected to the rotating shaft (212); first electric slide rails (22) are provided on both sides above the fixing plate (214), and the second motor (213) is electrically connected to the central control platform.

9. The heavy metal contaminated soil leaching device according to claim 1, characterized in that: The clamping mechanism (23) comprises a connecting block (231) fixedly connected to the first electric slide rail (22), a guide rod (232) rotatably mounted on both sides of the connecting block (231), a positive and negative threaded rod (233) rotatably mounted between the connecting blocks (231), a guide block (234) mounted on both sides of the guide rod (232), a sleeve block (235) mounted on both sides of the positive and negative threaded rod (233), a third motor (236) fixedly connected to the outer side of the connecting block at one end, a clamping plate (237) fixedly connected to the upper ends of the guide block (234) and the sleeve block (235), and a baffle (238) arranged on the clamping plate (237); one end of the positive and negative threaded rod (233) is fixedly connected to the output shaft of the third motor (236), and the third motor (236) is electrically connected to the central control platform.

10. A heavy metal contaminated soil leaching device according to claim 2, characterized in that: The pipe hole at the bottom of the side of the filter box (121) is connected to the liquid inlet of the second liquid pump (4) provided on the base (11); the liquid outlet at the other end of the second liquid pump (4) is connected to the liquid inlet on one side of the electrolysis device (31) through the first liquid pipe (41); the liquid outlet at the other side of the electrolysis device (31) is connected to the liquid inlet of the third liquid pump (5); the liquid outlet at the other end of the third liquid pump (5) is connected to the regulating tank (32) through the second liquid pipe (51). The regulating tank (32) is connected to a tank hole on one side, the upper end of the regulating tank (32) is rotatably connected to a tank cover, the upper end of the regulating tank (32) is provided with a fourth liquid pump (6), the liquid inlet pipe of the fourth liquid pump (6) extends into the interior of the regulating tank (32), and the liquid inlet pipe opening of the fourth liquid pump (6) is connected to the liquid inlet channel on the other side of the water inlet tank (18) through a third liquid pipe (61), and the second liquid pump (4), the electrolysis device (31), the third liquid pump (5), and the fourth liquid pump (6) are electrically connected to the central control platform.

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