Heavy metal contaminated soil remediation device and remediation method

Abstract

The invention discloses a heavy metal contaminated soil remediation device and method, and relates to the technical field of heavy metal contaminated soil remediation. According to the heavy metal contaminated soil remediation device and remediation method, a transverse spraying mechanism A and a transverse spraying mechanism B are combined for use, when airflow moves in a drainage cavity, fan blades B can be driven to rotate, so that a shaft rod B can drive a moving rod B to swing left and right, and a spray head A and a spray head B can also be driven to swing left and right, and a wider sowing range is facilitated; compared with the prior art, more labor is saved, gear abrasion can be avoided, and therefore the overall use efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy metal contaminated soil remediation, and specifically to a heavy metal contaminated soil remediation device and a remediation method. Background Art

[0002] Soil remediation is a technical measure to restore contaminated soil to its normal function. In the soil remediation industry, there are more than a hundred existing soil remediation technologies, and more than a dozen commonly used technologies, which can be roughly divided into three methods: physical, chemical, and biological.

[0003] Heavy metal contaminated soil refers to soil containing heavy metal elements that are harmful to human health and the environment, such as lead, cadmium, mercury, chromium, etc. Heavy metals are a widespread pollutant in soil, and their sources include industrial wastewater, waste treatment, coal combustion emissions, etc. Heavy metal pollution has a serious impact on human health and the environment, so corresponding treatment and remediation are required.

[0004] According to Chinese Patent CN116237354A, a soil remediation agent spraying device for soil remediation disclosed includes a loading rack, a connecting rack, a handle, wheels, a sprayer, an angle adjustment mechanism, and a height adjustment mechanism. The left part inside the loading rack is integrally formed with a connecting rack. The upper right side of the loading rack is connected with a handle. The lower side of the loading rack is rotatably connected with wheels. The middle part of the loading rack is connected with a sprayer. An angle adjustment mechanism for installing and adjusting the angle of the sprayer is provided between the upper parts of the loading rack and the connecting rack. A height adjustment mechanism for adjusting the height of the sprayer is provided on the angle adjustment mechanism. When pushing the device to move in the present invention, one can hold the driving component by hand, which will drive the rotating rod and the missing gear to move downward, so that the missing gear meshes with the first straight gear or the second straight gear. At the same time, the movement of the device will cause the wheels to rotate, and then drive the rotating rod to rotate through the missing gear and the second transmission component, and then cause the missing gear to rotate, so that the sprayer can rotate automatically.

[0005] The above spraying mechanism uses a gear drive for driving. However, long-term meshing drive of gears is likely to cause wear at the connection, which makes the meshing drive prone to falling off, and the gear drive mechanism is manually driven, which consumes a large amount of effort during driving. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a heavy metal contaminated soil remediation device and a remediation method, which solve the problems that the meshing drive is prone to falling off and the gear drive mechanism is manually driven, consuming a large amount of effort during driving.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A heavy metal contaminated soil remediation device includes a connecting plate, a bracket, and a handle. A bracket is fixedly installed at the top of one side of the connecting plate, and a handle is fixedly installed on the side of the bracket. Movable wheels are fixedly installed around the bottom of the connecting plate. A carrying box is fixedly installed at the top of the connecting plate. A conveying pipe is fixedly installed on the side of the carrying box. A transverse spraying mechanism A is arranged at the top of the carrying box; A transverse spraying mechanism B is arranged at the bottom of the connecting plate; An absorption port is opened inside the other side of the connecting plate. A negative pressure machine is fixedly installed on the outer wall of one side of the carrying box. An air extraction pipe is fixedly installed at the bottom of the negative pressure machine. An exhaust pipe is fixedly installed on the outer wall of the other side of the negative pressure machine. A liquid extraction pipe is fixedly installed at the bottom of the exhaust pipe. An air supply mechanism is arranged on the other side of the exhaust pipe.

[0008] Preferably, the transverse spraying mechanism A includes a piston block A, a shaft rod A, a swing rod A, a sleeve plate A, and a moving rod A. A piston block A is fixedly installed in the middle of the carrying box. The top of the piston block A is movably connected to the swing rod A. The outer wall of the swing rod A is sleeved with a sleeve plate A. The bottom of the sleeve plate A is movably connected to the moving rod A. One side of the moving rod A is movably sleeved with the shaft rod A.

[0009] Preferably, the inside of the transverse spraying mechanism B includes a fan blade B, a shaft rod B, a moving rod B, a movable shaft, and a movable block. A movable block is fixedly installed at the bottom of the connecting plate. The outer wall of the movable block is movably sleeved with a swing rod B. The outer wall of the swing rod B is sleeved with a sleeve plate B. The outer wall of the sleeve plate B is movably connected to the movable shaft. The top of the movable shaft is fixedly installed with the moving rod B. One side of the moving rod B is movably sleeved with the shaft rod B. The top of the shaft rod B is fixedly connected to the fan blade B. The connection between the fan blade B and the shaft rod B is movably sleeved with the bottom of the drainage cavity, and the fan blade B is located inside the drainage cavity.

[0010] Preferably, the bottom of the shaft rod A is fixedly connected to a stirring component. The stirring component includes a fan blade A, a shaft rod C, and a rotating blade. The top of the drainage cavity is movably sleeved with the fan blade A. The top of the fan blade A is fixedly connected to the bottom of the rotating blade. The connection between the rotating blade and the fan blade A is movably sleeved with the top of the drainage cavity.

[0011] Preferably, the inside of the liquid extraction pipe includes a transportation cavity, an installation cavity, a boosting block A, and a boosting cavity. A transportation cavity is opened inside the liquid extraction pipe. The side of the transportation cavity is fixedly connected to the boosting block A. The boosting block A is located inside the installation cavity. The installation cavity is located at the bottom of the liquid extraction pipe. A boosting cavity is opened inside the boosting block A.

[0012] Preferably, the exhaust pipe includes an injection port, an airflow activity chamber, and a boost block B. The injection port is opened inside the exhaust pipe, an airflow activity chamber is opened in the middle of the injection port, and a boost block B is fixedly installed inside the other side of the exhaust pipe.

[0013] Preferably, the interior of the liquid accumulation box includes a fixed port, a storage cavity, and a distribution pipe. The storage cavity is opened inside the liquid accumulation box, and the fixed port is opened on the side of the liquid accumulation box. The interior of the fixed port is fixedly connected to the other side of the exhaust pipe, and the outer walls of the distribution pipe are fixedly installed at both ends of the inner cavity of the storage cavity and are fixedly connected to the interiors of hose A and hose B. A nozzle A is fixedly installed on the top of hose A, and nozzle B is fixedly connected to the bottom of hose B.

[0014] Preferably, the following steps are included

[0015] S1. Preparation steps: First, inject the chemical repair agent into the interior of the carrying box through the delivery pipe, and then start the negative pressure machine so that the negative pressure machine can continuously draw air into the drainage cavity through the exhaust pipe fixed at the bottom.

[0016] S2, mixing step: when the drainage chamber is drawing air, the fan blade A will be moved by the airflow. When the fan blade A is moved, the rotating blade fixedly installed on the outer wall of the shaft C will be driven. When the rotating blade rotates, the raw liquid transported into the interior can be fully stirred.

[0017] S3. Pressurization step: When the negative pressure machine discharges the airflow, the airflow in the exhaust pipe will flow at a high speed, which will cause negative pressure inside the liquid extraction tube fixedly connected to the bottom of the exhaust pipe, and the liquid repair liquid in the carrying box will be absorbed into the exhaust pipe. The liquid will be pressurized inside the exhaust pipe, which causes the liquid to enter the liquid collection box and be distributed to the inside of hose B and hose A, so that nozzles A and B will spray.

[0018] S4, swinging step: during the rotation process, the shaft C and the rotating blades will also drive the shaft A to rotate. At this time, the shaft A will make the moving rod A rotate. During the movement, the sleeve A movably connected to the outer wall will drive the swing rod A to swing horizontally. During the swinging process, the spraying range of the sprinkler A will become larger. Similarly, the working mode of the horizontal spraying mechanism B is the same as that of the horizontal spraying mechanism A, which allows the sprinkler B to spray at a low position, making it convenient for spraying and use.

[0019] The present invention provides a heavy metal contaminated soil remediation device and remediation method. Compared with the prior art, it has the following beneficial effects:

[0020] 1. The heavy metal contaminated soil remediation device and remediation method use the combined use of the horizontal spraying mechanism A and the horizontal spraying mechanism B. When the air flow moves inside the diversion cavity, it will drive the fan blade B to rotate, causing the shaft rod B to drive the moving rod B to swing left and right, and also driving the nozzle A and the nozzle B to swing left and right, facilitating spreading over a wider range. Compared with the prior art, this is more labor-saving and can avoid gear wear, thus improving the overall use efficiency.

[0021] 2. The heavy metal contaminated soil remediation device and remediation method use the stirring assembly. When the air flow moves inside the diversion cavity, it will also deflect the fan blade A to rotate, and during the rotation of the fan blade A, it will also drive the shaft rod C and the rotating blade to rotate. This enables the remediation liquid agent added during work to be fully stirred, and at the same time can also drive the shaft rod A to rotate, thereby increasing the overall practicality.

[0022] 3. The heavy metal contaminated soil remediation device and remediation method use the combined use of the exhaust pipe and the liquid suction pipe. When the negative pressure machine discharges the air flow, the air flow in the exhaust pipe will flow at high speed, causing a negative pressure to be generated inside the liquid suction pipe fixedly connected to the bottom of the exhaust pipe, and sucking the liquid remediation agent in the carrying box into the inside of the exhaust pipe. This can suck the liquid during the air extraction process and transport it to the position where work is required, thereby improving the overall use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention;

[0024] Figure 2 It is a schematic overall sectional structure diagram of the carrying box of the present invention;

[0025] Figure 3 For the present invention Figure 1 The overall enlarged structural diagram of part A;

[0026] Figure 4 It is a schematic overall internal structure diagram of the liquid suction pipe of the present invention;

[0027] Figure 5 It is a schematic overall internal structure diagram of the exhaust pipe of the present invention;

[0028] Figure 6 It is a schematic internal structure diagram of the side of the exhaust pipe of the present invention;

[0029] Figure 7 It is a schematic overall internal structure diagram of the liquid accumulation box of the present invention.

[0030] In the figure: 1, connecting plate; 2, bracket; 3, handle; 4, carrying box; 5, moving wheel; 6, absorption port; 7, piston block A; 8, liquid suction pipe; 9, negative pressure machine; 10, air extraction pipe; 11, drainage cavity; 12, transverse spraying mechanism B; 121, fan blade B; 122, shaft rod B; 123, moving rod B; 124, movable shaft; 125, movable block; 126, swing rod B; 127, sleeve plate B; 13, stirring assembly; 131, fan blade A; 132, shaft rod C; 133, rotating blade; 15, spray head A; 16, hose A; 17, exhaust pipe; 18, liquid accumulation box; 181, fixed port; 182, storage cavity; 183, distribution pipe; 19, hose B; 20, spray head B; 21, shaft rod A; 22, swing rod A; 23, sleeve plate A; 24, moving rod A; 801, transportation cavity; 802, installation cavity; 803, pressure increasing block A; 804, pressure increasing cavity; 171, injection port; 172, air flow activity cavity; 173, pressure increasing block B. Specific implementation mode

[0031] The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-7 , the embodiments of the present invention provide a technical solution: a heavy metal contaminated soil remediation device, including a connecting plate 1, a bracket 2, a handle 3. A bracket 2 is fixedly installed at the top of one side of the connecting plate 1, and a handle 3 is fixedly installed on the side of the bracket 2. Moving wheels 5 are fixedly installed around the bottom of the connecting plate 1. A carrying box 4 is fixedly installed at the top of the connecting plate 1. A conveying pipe is fixedly installed on the side of the carrying box 4. A transverse spraying mechanism A is arranged at the top of the carrying box 4; a transverse spraying mechanism B 12 is arranged at the bottom of the connecting plate 1; an absorption port 6 is opened inside the other side of the connecting plate 1. A negative pressure machine 9 is fixedly installed on the outer wall of one side of the carrying box 4. An air extraction pipe 10 is fixedly installed at the bottom of the negative pressure machine 9. An exhaust pipe 17 is fixedly installed on the outer wall of the other side of the negative pressure machine 9. A liquid suction pipe 8 is fixedly installed at the bottom of the exhaust pipe 17. A gas supply mechanism is arranged on the other side of the exhaust pipe 17.

[0033] The horizontal spraying mechanism A includes a piston block A7, a shaft rod A21, a swing rod A22, a sleeve plate A23, and a moving rod A24. The piston block A7 is fixedly installed in the middle of the carrier box 4. The top of the piston block A7 is movably connected to the swing rod A22. The outer wall of the swing rod A22 is sleeved with the sleeve plate A23. The bottom of the sleeve plate A23 is movably connected to the moving rod A24. One side of the moving rod A24 is movably sleeved with the shaft rod A21. By starting the negative pressure machine 9, the shaft rod A21 rotates. During the rotation of the shaft rod A21, it drives the moving rod A24 to perform circular motion. At this time, the sleeve plate A23 movably connected to the outer wall of the moving rod A24 drives the swing rod A22 sleeved inside to swing left and right. When the distance between the swing rod A22 swinging to the left and the moving rod A24 becomes an isosceles triangle, the sleeve plate A23 will move from the original position of the swing rod A22 towards the piston block A7. At this time, the connection position between the moving rod A24 and the sleeve plate A23 will gradually change from the original longitudinal direction to the transverse direction, facilitating the moving rod A24 to rotate clockwise. When the outer walls of the sleeve plate A23 and the piston block A7 are mutually attached, the connection between the moving rod A24 and the sleeve plate A23 will gradually change from the transverse direction to the longitudinal direction, enabling the moving rod A24 to complete a semi-circular motion. When the sleeve plate A23 moves from away from the piston block A7 to the other side of the swing rod A22, the moving rod A24 will be the same as the above steps, enabling itself to complete a full circular motion. When the sleeve plate A23 moves to the other side of the swing rod A22, it will cause the swing rod A22 to swing to the right. Therefore, through the circular motion of the moving rod A24, the swing rod A22 can swing left and right, facilitating the expansion of the range during spraying and improving the overall usage efficiency. [028 Swing Guide Bar Machine] https: / / www.bilibili.com / video / BV1PZ4y1C7ZG / ?share_source=copy_web&vd_source=075b4468d03c4f4ed58ee74778f97fcd

[0034] The above website is the motion trajectory diagram of the horizontal spraying mechanism A.

[0035] The interior of the lateral spraying mechanism B12 includes a fan blade B121, a shaft B122, a motion rod B123, a movable shaft 124, and a movable block 125. The movable block 125 is fixedly installed at the bottom of the connecting plate 1, and the outer wall of the movable block 125 is movably connected to the rocker arm B126. The outer wall of the rocker arm B126 is connected to the sleeve plate B127. The outer wall of the sleeve plate B127 is movably connected to the movable shaft 124. The top of the movable shaft 124 is fixedly installed with a motion rod B123. One side of the motion rod B123 is movably connected to the shaft B122. The top of the shaft B122 is fixedly connected to the fan blade B121. The connection between the fan blade B121 and the shaft rod B122 is movably connected to the bottom of the drainage chamber 11, and the fan blade B121 is located inside the drainage chamber 11. The working mode of the lateral spraying mechanism B12 is the same as that of the above-mentioned lateral spraying mechanism A. The difference is that by lowering its own height, it can perform secondary spraying on the dead corners generated by the lateral spraying mechanism A when spraying. The bottom of the fan blade B121 is fixedly connected to the shaft rod B122. When the airflow moves inside the drainage chamber 11, it will drive the fan blade B121 to rotate, causing the shaft rod B122 to drive the moving rod B123 to swing left and right.

[0036] The bottom of the shaft A21 is fixedly connected to the stirring assembly 13, and the stirring assembly 13 includes fan blades A131, a shaft C132, and rotating blades 133. The top of the drainage chamber 11 is movably connected to the fan blades A131, and the top of the fan blades A131 and the bottom of the rotating blades 133 are fixedly connected, and the connection between the rotating blades 133 and the fan blades A131 is movably connected to the top of the drainage chamber 11. When the airflow moves inside the drainage chamber 11, it will also drive the fan blades A131 to rotate, and the rotation of the fan blades A131 will also drive the shaft C132 and the rotating blades 133 to rotate, which means that the added repair liquid can be fully stirred during work. At the same time, the top of the shaft C132 is fixedly connected to the bottom of the shaft A21, so when the shaft C132 rotates, it can drive the moving rod A24 to perform circular motion. It should be noted that the movable connection between the fan blades A131 and the shaft C132 can be placed with a sealing ring according to the existing technology to avoid leakage during work.

[0037] The interior of the liquid extraction tube 8 includes a transportation cavity 801, an installation cavity 802, a pressurizing block A803, and a pressurizing cavity 804. The transportation cavity 801 is opened inside the liquid extraction tube 8. The side of the transportation cavity 801 is fixedly connected to the pressurizing block A803. The pressurizing block A803 is located inside the installation cavity 802. The installation cavity 802 is located at the bottom of the liquid extraction tube 8. The pressurizing cavity 804 is opened inside the pressurizing block A803. During the process of the high-speed flow of air in the exhaust pipe 17, since the inner diameter of the liquid extraction tube 8 is smaller than that of the exhaust pipe 17, a negative pressure will be formed inside the liquid extraction tube 8. During the generation of the negative pressure, the liquid extraction tube 8 will absorb the liquid agent inside the carrying box 4 into its interior. During the absorption process, it will directly enter the interior of the installation cavity 802, and then enter the interior of the pressurizing block A803 through the installation cavity 802. From Figure 4 It can be seen that the left side of the pressurizing cavity 804 is smaller than the right side. Therefore, when the suction force absorbs the liquid agent into the interior of the pressurizing block A803 and flows out, the liquid agent will be squeezed, thereby increasing the pressure and causing the flow rate to become faster. This causes the liquid agent to be quickly transported into the interior of the exhaust pipe 17.

[0038] The exhaust pipe 17 includes an injection port 171, an air flow activity cavity 172, and a pressurizing block B173. The injection port 171 is opened inside the exhaust pipe 17. The air flow activity cavity 172 is opened in the middle of the injection port 171. The other side inside the exhaust pipe 17 is fixedly installed with the pressurizing block B173. Through the air flow activity cavity 172, the liquid agent can be transported into the interior of the injection port 171. As the air flow mixes with the liquid agent, it will directly enter the other side of the exhaust pipe 17. And the other side inside the exhaust pipe 17 is fixedly installed with the pressurizing block B173. From Figure 6 It can be seen that the middle of the pressurizing block B173 becomes narrower, which causes the liquid agent and air to be secondarily squeezed during the internal movement, so that it can be quickly transported into the interior of the liquid accumulation box 18.

[0039] The interior of the liquid accumulation box 18 includes a fixing port 181, a storage cavity 182, and a distribution pipe 183. The storage cavity 182 is opened inside the liquid accumulation box 18. The fixing port 181 is opened on the side of the liquid accumulation box 18. The interior of the fixing port 181 is fixedly connected to the other side of the exhaust pipe 17. And both ends of the inner cavity of the storage cavity 182 are fixedly installed on the outer wall of the distribution pipe 183 and fixedly connected to the interiors of the hose A16 and the hose B19. The top of the hose A16 is fixedly installed with a nozzle A15. The bottom of the hose B19 is fixedly connected to a nozzle B20. When the liquid agent is directly transported into the interior of the liquid accumulation box 18 through the fixing port 181, it will accumulate inside the liquid accumulation box 18. When the liquid agent inside the fixing port 181 continuously surges in, the volume and density of the internal liquid agent will both increase. The liquid agent will be transported through the distribution pipe 183 into the interiors of the hose A16 and the hose B19 and sprayed out by the nozzles B20 and the nozzle A15, which is convenient for repair, and thus the overall use efficiency can be improved.

[0040] Working principle: During the working process, a liquid agent is thrown into the interior of the conveying pipe, and then the negative pressure machine 9 is started. When starting, the suction port 6 sucks air, which causes the stirring assembly 13 and the transverse spraying mechanism B12 to rotate. During the rotation, the stirring assembly 13 can rotate inside the carrying box 4 to facilitate stirring. During the stirring process, it will drive the shaft rod A21 to rotate, causing the swing rod A22 to swing left and right. At the same time, when the transverse spraying mechanism B12 rotates, it will also swing left and right. Therefore, during the exhaust process of the negative pressure machine 9, the negative pressure inside the liquid extraction pipe 8 can transport the liquid inside the carrying box 4 into the interior of the exhaust pipe 17, and through the exhaust pipe 17, it is injected into the interior of the liquid accumulation box 18 and respectively inside the dosing nozzles A15 and nozzle B20. The nozzles A15 and nozzle B20 are installed inside the swing rod B126 and the swing rod A22. When swinging back and forth, the spreading range becomes larger, facilitating the increase of the repair area.

[0041] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy metal contaminated soil remediation device, comprising a connecting plate (1), a bracket (2), and a handle (3). A bracket (2) is fixedly installed at the top of one side of the connecting plate (1), and a handle (3) is fixedly installed on the side of the bracket (2). Moving wheels (5) are fixedly installed around the bottom of the connecting plate (1), and it is characterized in that: A carrying box (4) is fixedly installed at the top of the connecting plate (1). A conveying pipe is fixedly installed on the side of the carrying box (4). A transverse spraying mechanism A is arranged at the top of the carrying box (4); a transverse spraying mechanism B (12) is arranged at the bottom of the connecting plate (1); an absorption port (6) is formed inside the other side of the connecting plate (1). A negative pressure machine (9) is fixedly installed on the outer wall of one side of the carrying box (4). An air extraction pipe (10) is fixedly installed at the bottom of the negative pressure machine (9). An exhaust pipe (17) is fixedly installed on the outer wall of the other side of the negative pressure machine (9). A liquid extraction pipe (8) is fixedly installed at the bottom of the exhaust pipe (17). A gas supply mechanism is arranged on the other side of the exhaust pipe (17).

2. The heavy metal contaminated soil remediation device according to claim 1, wherein: The transverse spraying mechanism A includes a piston block A (7), a shaft rod A (21), a swing rod A (22), a sleeve plate A (23), and a moving rod A (24). The piston block A (7) is fixedly installed in the middle of the carrying box (4). The top of the piston block A (7) is movably connected to the swing rod A (22). The outer wall of the swing rod A (22) is sleeved with the sleeve plate A (23). The bottom of the sleeve plate A (23) is movably connected to the moving rod A (24). One side of the moving rod A (24) is movably sleeved with the shaft rod A (21).

3. A heavy metal contaminated soil remediation device according to claim 1, characterized in that: The inside of the transverse spraying mechanism B (12) includes a fan blade B (121), a shaft rod B (122), a moving rod B (123), a movable shaft (124), and a movable block (125). The movable block (125) is fixedly installed at the bottom of the connecting plate (1). The outer wall of the movable block (125) is movably sleeved with a swing rod B (126). The outer wall of the swing rod B (126) is sleeved with a sleeve plate B (127). The outer wall of the sleeve plate B (127) is movably connected to the movable shaft (124). The top of the movable shaft (124) is fixedly installed with the moving rod B (123). One side of the moving rod B (123) is movably sleeved with the shaft rod B (122). The top of the shaft rod B (122) is fixedly connected to the fan blade B (121). The connection part of the fan blade B (121) and the shaft rod B (122) is movably sleeved with the bottom of the drainage cavity (11), and the fan blade B (121) is located inside the drainage cavity (11).

4. A heavy metal contaminated soil remediation device according to claim 1, characterized in that: The bottom of the shaft rod A (21) is fixedly connected to a stirring assembly (13). The stirring assembly (13) includes a fan blade A (131), a shaft rod C (132), and a rotating blade (133). The fan blade A (131) is movably sleeved with the top of the drainage cavity (11). The top of the fan blade A (131) is fixedly connected to the bottom of the rotating blade (133), and the connection part of the rotating blade (133) and the fan blade A (131) is movably sleeved with the top of the drainage cavity (11).

5. A heavy metal contaminated soil remediation device according to claim 1, characterized in that: The interior of the liquid extraction tube (8) comprises a transport chamber (801), an installation chamber (802), a pressure-boosting block A (803), and a pressure-boosting chamber (804); the interior of the liquid extraction tube (8) is provided with a transport chamber (801); the side of the transport chamber (801) is fixedly connected to the pressure-boosting block A (803); the pressure-boosting block A (803) is located inside the installation chamber (802); the installation chamber (802) is located at the bottom of the liquid extraction tube (8); and the interior of the pressure-boosting block A (803) is provided with a pressure-boosting chamber (804).

6. The heavy metal contaminated soil remediation device according to claim 1, wherein: The exhaust pipe (17) comprises an injection port (171), an air flow activity chamber (172), and a pressure boosting block B (173); the injection port (171) is provided inside the exhaust pipe (17), the air flow activity chamber (172) is provided in the middle of the injection port (171), and the pressure boosting block B (173) is fixedly installed inside the other side of the exhaust pipe (17).

7. A heavy metal contaminated soil remediation device according to claim 1, characterized in that: The interior of the liquid accumulation box (18) includes a fixed port (181), a storage chamber (182), and a distribution pipe (183). The storage chamber (182) is provided inside the liquid accumulation box (18), and the fixed port (181) is provided on the side of the liquid accumulation box (18). The interior of the fixed port (181) is fixedly connected to the other side of the exhaust pipe (17), and the outer wall of the distribution pipe (183) is fixedly installed at both ends of the inner cavity of the storage chamber (182) and is fixedly connected to the interior of the hose A (16) and the hose B (19). The top of the hose A (16) is fixedly installed with a nozzle A (15), and the bottom of the hose B (19) is fixedly connected to the nozzle B (20).

8. A heavy metal contaminated soil remediation method according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Preparation step: first, inject a chemical repair agent into the interior of the carrying box (4) through the delivery pipe, and then start the negative pressure machine (9), so that the negative pressure machine (9) can continuously draw air into the interior of the drainage cavity (11) through the exhaust pipe (10) fixedly installed at the bottom. S2, mixing step: when the drainage chamber (11) is drawing air in, the fan blade A (131) is moved by the airflow. When the fan blade A (131) is moved, the rotating blade (133) fixedly mounted on the outer wall of the shaft C (132) is driven. When the rotating blade (133) rotates, the raw liquid transported into the interior can be fully stirred. S3, pressurization step: (When the negative pressure machine (9) discharges the airflow, the airflow in the exhaust pipe (17) will flow at a high speed, which will cause negative pressure to be generated inside the liquid extraction pipe (8) fixedly connected to the bottom of the exhaust pipe (17), and the liquid repair liquid in the supporting box (4) will be absorbed into the exhaust pipe (17). The liquid will be pressurized inside the exhaust pipe (17), which causes the liquid to enter the liquid collection box (18) and be distributed to the inside of the hose B (19) and the hose A (16), so that the nozzle A (15) and the nozzle B (20) will spray. S3. Swing step: During the rotation of the shaft rod C (132) and the rotating blade (133), the shaft rod A (21) will also be driven to rotate. At this time, the shaft rod A (21) will cause the motion rod A (24) to perform a rotational motion. During the motion, the sleeve plate A (23) movably connected to the outer wall will drive the swing rod A (22) to perform a lateral swing, and during the swing, the spraying range of the nozzle A (15) will be enlarged. Similarly, the working mode of the lateral spraying mechanism B (12) is the same as that of the lateral spraying mechanism A, which enables the nozzle B (20) to spray the lower positions, thus facilitating spraying and use.

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