Underground water heavy metal pollution remediation device based on self-remediation

Abstract

The invention discloses an underground water heavy metal pollution remediation device based on self-remediation, and relates to the technical field of underground water purification. The device comprises a treatment box, a water suction pump is fixed to the top of the treatment box, a treatment device is arranged in the treatment box, the treatment device comprises a water injection pool fixed to the upper portion of the interior of the treatment box and a pesticide spraying pipe rotationally installed in the treatment box, and a water receiving pool is fixed to the bottom of the water injection pool; and a Z-shaped flow channel is formed between the water injection pool and the water receiving pool. Through the arrangement of the treatment device, a water suction pump, a water injection pool, an activated carbon adsorption plate, a water receiving pool, a biological adsorption plate, a through hole plate, a chemical injection part and a chemical spraying pipe are matched, the through hole plate enables underground water to be slowed down from the original high flow speed, a local slow flow area is formed, the staying time of the underground water at the through hole plate is prolonged, and the underground water is prevented from entering the chemical spraying pipe. More time is provided for the contact of the treatment agent and water, so that the uniform mixing of the treatment agent and underground water is promoted.

Description

Technical Field

[0001] This invention relates to the field of groundwater purification technology, specifically to a groundwater heavy metal pollution remediation device based on autonomous remediation. Background Technology

[0002] Groundwater heavy metal pollution remediation devices utilize physical, chemical, and biological technologies to remove heavy metal ions from water through adsorption, precipitation, electrolysis, and reverse osmosis. Common remediation materials include activated carbon, nanomaterials, and plant roots, which can effectively reduce the concentration of harmful elements such as lead, mercury, and arsenic in water, improve water quality, and ensure the safe and sustainable use of groundwater resources.

[0003] Chinese patent publication number CN 212269685 U discloses a remediation device for treating heavy metal pollution in groundwater, relating to the field of groundwater pollution remediation technology. It addresses the problems of high remediation costs, large size, and complex structure in existing groundwater heavy metal pollution remediation devices. The device comprises a groundwater layer at the lower end of a soil layer, a base plate at the upper end of the soil layer, a treatment and remediation tank at the upper end of the base plate, an inlet pipe on one side of the treatment and remediation tank, a first water pump outside the inlet pipe, a reagent tank at the upper end of the treatment and remediation tank with a liquid inlet at the upper end, an outlet pipe on one side of the reagent tank, a second water pump outside the outlet pipe, a main spray head at one end of the outlet pipe, a first adsorption plate inside the treatment and remediation tank, and a second adsorption plate on one side of the first adsorption plate.

[0004] However, the current remediation device has the following problems: When adding chemicals to treat groundwater, it is difficult to ensure uniform mixing of the groundwater and the treatment agent. If the groundwater and agent are not fully mixed, it can easily lead to excessively high agent concentrations in some areas and excessively low concentrations in others, thus affecting the remediation effect. Especially when treating heavy metal pollution or other hazardous substances, areas with insufficient agent concentrations cannot achieve the expected remediation results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a groundwater heavy metal pollution remediation device based on autonomous remediation, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-remediation groundwater heavy metal pollution remediation device, comprising a treatment tank, a water pump fixed to the top of the treatment tank, a treatment device inside the treatment tank, the treatment device comprising a water injection tank fixed to the upper part of the treatment tank, a spraying pipe rotatably installed inside the treatment tank, a receiving tank fixed to the bottom of the water injection tank, a Z-shaped flow channel formed between the water injection tank and the receiving tank, an activated carbon adsorption plate fixed inside the water injection tank, a bio-adsorption plate fixed inside the receiving tank, a guide plate fixed to the bottom of the receiving tank, a perforated plate fixed between the guide plate and the inner wall of the treatment tank, the spraying pipe being driven by a motor, the motor being fixed to the outer wall of the treatment tank by a U-shaped bracket, the spraying pipe being positioned above the perforated plate, and a spraying device for injecting chemicals into the spraying pipe being provided on one side of the spraying pipe.

[0007] Preferably, a number of stirring blades are evenly fixed on the outer circumference of the spray pipe.

[0008] Preferably, the injection device includes a medicine box fixed to the outside of the treatment box, a pump fixed to the bottom of the medicine box, and an injection ring fixed to the bottom of the pump through a conduit, the injection ring being located outside the spray pipe.

[0009] Preferably, the outside of the spray pipe has a drug inlet that communicates with the inside of the drug injection ring.

[0010] Preferably, an anti-accumulation device is provided at the water injection pool. The anti-accumulation device includes a screw rotatably mounted on the top of the water injection pool, a pulley one fixed to one end of the screw, a pulley two fixed to one end of the spray pipe, and a friction plate fixed to one side of the inner wall of the water injection pool. The pulley one and pulley two are connected by belt drive. A U-shaped frame is threadedly connected to the outside of the screw, and the U-shaped frame is slidably mounted between the inner wall of the water injection pool and the friction plate. A push plate is rotatably mounted inside the U-shaped frame. A stop bar for limiting the rotation of the push plate to one side is fixed on one side of the inside of the U-shaped frame. A friction wheel is fixed to one end of the rotating shaft of the push plate.

[0011] Preferably, the outer surface of the friction wheel and the top surface of the friction plate are both roughened, and the outer surface of the friction wheel is in contact with the top surface of the friction plate.

[0012] Preferably, an air injection device is provided at the water receiving pool. The air injection device includes a U-shaped rod fixed to the outer wall of the water receiving pool, an L-shaped groove plate slidably installed on the top of the U-shaped rod, an L-shaped column fixed to the outside of the pulley, and a fixing plate fixed to the outer wall of the water receiving pool. A through groove is opened on the outer wall of the vertical support rod of the L-shaped groove plate. The end of the L-shaped column rod away from the pulley is slidably installed inside the through groove of the vertical support rod of the L-shaped groove plate. A folded bladder is fixed on the side of the fixing plate near the pulley. A T-shaped pressure plate is fixed between the folded bladder and the vertical support rod of the L-shaped groove plate. A one-way air inlet is fixed on the outside of the fixing plate for controlling the one-way air intake of the folded bladder. An air guide plate is horizontally inserted and slidably installed on the side of the water receiving pool away from the treatment box. The air guide plate is used to control the one-way air output of the folded bladder. Several perforated plates are fixed on the outer wall of the air guide plate. The top of the perforated plates is in contact with the bottom of the activated carbon adsorption plate. The air guide plate and the folded bladder are connected by a flexible hose.

[0013] Preferably, the top of the air guide plate is connected to the top of the horizontal support rod of the L-shaped groove plate by a U-shaped connecting rod.

[0014] This invention provides a self-remediation-based groundwater heavy metal pollution remediation device. It has the following beneficial effects: (1) The present invention, through the arrangement of the treatment device, enables the water pump, water injection tank, activated carbon adsorption plate, water receiving tank, biological adsorption plate, perforated plate, injection component and spray pipe to work together. The presence of the perforated plate slows down the original fast flow rate of groundwater, forming a local "slow flow zone". The groundwater stays at the perforated plate for a longer time, providing more time for the treatment agent to contact the water, thereby promoting the uniform mixing of the treatment agent and the groundwater. At the same time, the motor drives the spray pipe to spray the treatment agent in a rotating manner. The rotating spray increases the contact area between the agent and the groundwater, making the agent more quickly and evenly distributed in the water, improving the effect of the agent. In addition, the spray pipe will drive the stirring blade to stir the groundwater at the perforated plate. Through stirring, the treatment agent in the water flow will no longer be locally too concentrated or too diluted, but will be more evenly distributed in the water, avoiding the problem of uneven distribution of the treatment agent.

[0015] (2) The present invention, through the setting of the anti-accumulation device, enables the spray pipe, pulley two, pulley one, screw, U-shaped frame, water injection tank, friction wheel and friction plate to cooperate, so that the push plate pushes the impurities on the surface of the activated carbon adsorption plate from one side of the water injection tank to the other side of the water injection tank. With the reciprocating motion of the push plate, the surface of the activated carbon adsorption plate is continuously cleaned, ensuring that the surface always maintains a high adsorption performance. The function of activated carbon is to adsorb impurities and pollutants in water. If the surface is covered or blocked by impurities, the adsorption effect will be greatly reduced. Therefore, timely cleaning of surface impurities helps to maintain the effective adsorption area of ​​activated carbon and enhance the overall water purification efficiency of the system. The push plate pushes the impurities to the other side of the water injection tank, avoiding these impurities from flowing back to the surface of the activated carbon adsorption plate and reducing the risk of secondary pollution.

[0016] (3) The present invention, through the setting of the air injection device, enables the pulley, L-shaped column, L-shaped groove plate, U-shaped rod, T-shaped pressure plate, folded bag and air guide plate to work together to inject air from the bottom of the activated carbon adsorption plate into the activated carbon adsorption plate. Driven by the airflow, impurities and deposits on the surface of the activated carbon adsorption plate are blown away or removed, similar to physical backflushing. This helps to maintain the long-term adsorption capacity of the activated carbon adsorption plate and avoid the adsorption layer being blocked by impurities. At the same time, during each reciprocating movement of the L-shaped groove plate, the L-shaped groove plate drives the air guide plate to reciprocate through the U-shaped connecting rod. The air guide plate drives the perforated plate to reciprocate at the bottom of the activated carbon adsorption plate. The reciprocating movement of the air guide plate can ensure the uniform distribution of air at the bottom of the activated carbon adsorption plate. The movement of the perforated plate at the bottom helps the periodic uniform distribution of airflow and avoids airflow in a single direction or concentrated area. This is very beneficial to the cleaning and adsorption capacity of activated carbon. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire invention. Figure 1 ; Figure 2 This is a schematic diagram of the entire invention. Figure 2 ; Figure 3 This is a schematic diagram of a partial cross-section of the present invention; Figure 4 This is a partial cross-sectional schematic diagram of the processing device of the present invention; Figure 5 This is a partial structural schematic diagram of the processing device of the present invention; Figure 6 This is a schematic diagram of the anti-accumulation device of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the anti-accumulation device of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the gas injection device of the present invention.

[0018] In the diagram: 1. Treatment tank; 2. Water pump; 3. Treatment device; 31. Water injection tank; 32. Activated carbon adsorption plate; 33. Water receiving tank; 34. Bio-adsorption plate; 35. Guide plate; 36. Perforated plate; 37. Spraying pipe; 38. Stirring blade; 39. Injection component; 391. Medicine tank; 392. Pump; 393. Conduit; 394. Injection ring; 4. Anti-accumulation device; 41. Screw. 42. Belt pulley one; 43. Belt pulley two; 44. U-shaped frame; 45. Stop bar; 46. Friction wheel; 47. Push plate; 48. Friction plate; 5. Air injection device; 51. U-shaped rod; 52. L-shaped groove plate; 53. L-shaped column rod; 54. T-shaped pressure plate; 55. Folding bag; 56. Fixing plate; 57. One-way air inlet; 58. Air guide plate; 59. Air vent plate; 510. U-shaped connecting rod. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figures 1-8One embodiment of the present invention is as follows: a groundwater heavy metal pollution remediation device based on self-remediation includes a treatment tank 1, a water pump 2 fixed to the top of the treatment tank 1, a treatment device 3 installed inside the treatment tank 1, the treatment device 3 including a water injection tank 31 fixed to the upper part of the treatment tank 1, a spraying pipe 37 rotatably installed inside the treatment tank 1, a receiving tank 33 fixed to the bottom of the water injection tank 31, and a Z-shaped flow channel formed between the water injection tank 31 and the receiving tank 33. An activated carbon adsorption plate 32 is fixed inside the water injection tank 31, a bio-adsorption plate 34 is fixed inside the receiving tank 33, a guide plate 35 is fixed to the bottom of the receiving tank 33, and a perforated plate 36 is fixed between the guide plate 35 and the inner wall of the treatment tank 1. The spraying pipe 37 is driven by a motor, and the motor is fixed to the outer wall of the treatment tank 1 by a U-shaped bracket. The spraying pipe 37 is located above the perforated plate 36, and one side of the spraying pipe 37 is provided for spraying... The injection unit 39 inside the injection tube 37 includes a medicine tank 391 fixed to the outside of the treatment tank 1. A pump 392 is fixed to the bottom of the medicine tank 391. An injection ring 394 is fixed to the bottom of the pump 392 through a conduit 393. The injection ring 394 is located outside the spray tube 37. An inlet communicating with the inside of the injection ring 394 is opened on the outside of the spray tube 37. Through the above structure, the presence of the perforated plate 36 slows down the original fast flow rate of groundwater, forming a local "slow flow zone". The groundwater stays at the perforated plate 36 for a longer time, providing more time for the treatment agent to contact the water, thereby promoting the uniform mixing of the treatment agent and the groundwater. At the same time, the motor drives the spray tube 37 to spray the treatment agent in a rotating manner. The rotating spray increases the contact area between the agent and the groundwater, making the agent more quickly and evenly distributed in the water, improving the effect of the agent.

[0021] Several stirring blades 38 are evenly fixed on the outer circumference of the spray pipe 37. Through the above structure, the stirring blades 38 agitate the groundwater at the through-hole plate 36. Through agitation, the treatment agent in the water flow no longer becomes too concentrated or too diluted in some places, but is distributed more evenly in the water, avoiding the problem of uneven distribution of treatment agent.

[0022] An anti-accumulation device 4 is installed at the water injection tank 31. The anti-accumulation device 4 includes a screw 41 rotatably mounted on the top of the water injection tank 31, a pulley 42 fixed to one end of the screw 41, a pulley 43 fixed to one end of the spray pipe 37, and a friction plate 48 fixed to one side of the inner wall of the water injection tank 31. The pulley 42 and the pulley 43 are connected by belt drive. A U-shaped frame 44 is threadedly connected to the outside of the screw 41, and the U-shaped frame 44 is slidably mounted between the inner wall of the water injection tank 31 and the friction plate 48. A push plate 47 is rotatably mounted inside the U-shaped frame 44. A stop bar 45 is fixed to one side of the inside of the U-shaped frame 44 to limit the rotation of the push plate 47 to one side. A friction wheel 46 is fixed to one end of the rotating shaft of the push plate 47. The outer surface of the friction wheel 46 and the top of the friction plate 48 are both roughened. The outer surface of the friction wheel 46 contacts the top of the friction plate 48. Through the above structure, the U-shaped frame 44 drives the push plate 47 to push the impurities on the surface of the activated carbon adsorption plate 32 from one side of the water injection tank 31 to the other side. With the reciprocating motion of the push plate 47, the surface of the activated carbon adsorption plate 32 is continuously cleaned to ensure that the surface always maintains a high adsorption performance. The function of activated carbon is to adsorb impurities and pollutants in water. If the surface is covered or blocked by impurities, the adsorption effect will be greatly reduced. Therefore, timely cleaning of surface impurities helps to maintain the effective adsorption area of ​​activated carbon and enhance the overall water purification efficiency of the system. The push plate 47 pushes the impurities to the other side of the water injection tank 31, preventing these impurities from flowing back to the surface of the activated carbon adsorption plate 32 and reducing the risk of secondary pollution.

[0023] In use, the inlet pipe of water pump 2 is moved to the groundwater source, and water pump 2 is started. Water pump 2 draws groundwater into injection tank 31. Activated carbon adsorption plate 32 performs the first filtration of the groundwater. The filtered groundwater enters receiving tank 33, where biological adsorption plate 34 performs the second filtration. Then, guide plate 35 directs the second-filtered groundwater to perforated plate 36. Simultaneously, pump 392 is started, drawing treatment agent from chemical tank 391 and injecting it into spray pipe 37 through conduit 393 and injection ring 394. Spray pipe 37 sprays the treatment agent onto the groundwater flowing through perforated plate 36. The presence of perforated plate 36 slows down the originally rapid flow of groundwater, forming a... The process creates a localized "slow-flow zone," increasing the residence time of groundwater at the perforated plate 36. This provides more time for the treatment agent to contact the water, promoting uniform mixing. Simultaneously, the motor drives the spray pipe 37 to rotate intermittently in both directions, spraying the treatment agent in a rotating manner. This rotational spraying increases the contact area between the agent and the groundwater, allowing the agent to be distributed more quickly and evenly in the water, improving its effectiveness. Furthermore, the spray pipe 37 drives the stirring blades 38 to agitate the groundwater at the perforated plate 36. This agitation prevents the treatment agent from becoming too concentrated or too diluted in certain areas, ensuring a more even distribution and avoiding uneven distribution.

[0024] It should be noted that the activated carbon adsorption plate 32 can adsorb multiple heavy metal cations simultaneously and has a large adsorption capacity. The bio-adsorption plate 34 mainly utilizes the chemical structure of bio-machine derivatives and certain special components to adsorb, complex, and exchange heavy metal ions in groundwater, ultimately achieving the purpose of removing heavy metal ions from groundwater.

[0025] During the rotation of the spray pipe 37, the second pulley 43 rotates. The second pulley 43 drives the first pulley 42 to rotate intermittently in both directions via a belt. The first pulley 42 drives the screw 41 to rotate intermittently in both directions. The screw 41 drives the U-shaped frame 44 to move reciprocally along the inside of the water injection tank 31. When the U-shaped frame 44 drives the push plate 47 to move towards the first pulley 42, the U-shaped frame 44 drives the friction wheel 46 to move along with it via the push plate 47. Under the action of friction between the friction wheel 46 and the friction plate 48, the friction plate 48 drives the friction wheel 46 to rotate. The friction wheel 46 drives the push plate 47 to rotate, and the push plate 47 opens the U-shaped notch of the U-shaped frame 44. At this time, impurities on the surface of the activated carbon adsorption plate 32 will pass through the U-shaped notch of the U-shaped frame 44. When the U-shaped frame 44 drives the push plate 47 to move away from the first pulley 42, the U-shaped frame 44 drives the friction wheel through the push plate 47. As 46 moves, the stop lever 45 restricts the rotation trajectory of the push plate 47. Therefore, the friction wheel 46 and the friction plate 48 change from rolling friction to sliding friction. This causes the U-shaped frame 44 to drive the push plate 47 to push the impurities on the surface of the activated carbon adsorption plate 32 from one side of the water injection tank 31 to the other side. With the reciprocating motion of the push plate 47, the surface of the activated carbon adsorption plate 32 is continuously cleaned to ensure that the surface always maintains a high adsorption performance. The function of activated carbon is to adsorb impurities and pollutants in water. If the surface is covered or blocked by impurities, the adsorption effect will be greatly reduced. Therefore, timely cleaning of surface impurities helps to maintain the effective adsorption area of ​​activated carbon and enhance the overall water purification efficiency of the system. The push plate 47 pushes the impurities to the other side of the water injection tank 31, preventing these impurities from flowing back to the surface of the activated carbon adsorption plate 32 and reducing the risk of secondary pollution.

[0026] Please see Figures 1-8Based on the above embodiments, in another embodiment of the present invention, an air injection device 5 is provided at the water receiving pool 33. The air injection device 5 includes a U-shaped rod 51 fixed to the outer wall of the water receiving pool 33, an L-shaped groove plate 52 slidably installed on the top of the U-shaped rod 51, an L-shaped column rod 53 fixed to the outside of the pulley 42, and a fixing plate 56 fixed to the outer wall of the water receiving pool 33. A through groove is opened on the outer wall of the vertical support rod of the L-shaped groove plate 52. The end of the L-shaped column rod 53 away from the pulley 42 is slidably installed inside the through groove of the vertical support rod of the L-shaped groove plate 52. A folding bladder 55 is fixed on the side of the fixing plate 56 near the pulley 42. A T-shaped pressure plate 54 is fixed between the folding bladder 55 and the vertical support rod of the L-shaped groove plate 52. A one-way air inlet 57 for controlling the one-way air intake of the folding bladder 55 is fixed on the outside of the fixing plate 56. An air guide is horizontally inserted and slidably installed on the side of the water receiving pool 33 away from the treatment box 1. Plate 58, the air guide plate 58 is used to control the unidirectional air outflow of the folded capsule 55. Several perforated plates 59 are fixed on the outer wall of the air guide plate 58. The top of the perforated plates 59 is in contact with the bottom of the activated carbon adsorption plate 32. The air guide plate 58 and the folded capsule 55 are connected by a hose. Through the above structure, the perforated plates 59 inject air from the bottom of the activated carbon adsorption plate 32 into the activated carbon adsorption plate 32. Driven by the airflow, impurities and deposits on the surface of the activated carbon adsorption plate 32 are blown away or removed, similar to physical backflushing. This helps to maintain the long-term adsorption capacity of the activated carbon adsorption plate 32 and avoid the adsorption layer being blocked by impurities. Each time the L-shaped groove plate 52 moves away from the folded capsule 55, the L-shaped groove plate 52 stretches the folded capsule 55 through the T-shaped pressure plate 54. The folded capsule 55 takes in air through the one-way air inlet 57, thereby replenishing the air inside the folded capsule 55.

[0027] The top of the air guide plate 58 is connected to the top of the horizontal support rod of the L-shaped groove plate 52 by a U-shaped connecting rod 510. With the above structure, the air guide plate 58 drives the perforated plate 59 to move back and forth at the bottom of the activated carbon adsorption plate 32. The reciprocating motion of the air guide plate 58 can ensure the uniform distribution of air at the bottom of the activated carbon adsorption plate 32. The movement of the perforated plate 59 at the bottom helps the periodic uniform distribution of airflow, avoiding airflow in a single direction or concentrated area, which is very beneficial to the cleaning and adsorption capacity of activated carbon.

[0028] During use, the rotation of pulley 42 drives the L-shaped column 53 to rotate. The L-shaped column 53 slides along the vertical support groove of the L-shaped groove plate 52, and pushes the L-shaped groove plate 52 to reciprocate along the top of the U-shaped rod 51. Each time the L-shaped groove plate 52 moves towards the folded bladder 55, it compresses the folded bladder 55 through the T-shaped pressure plate 54. The air in the folded bladder 55 is transmitted to the interior of the air guide plate 58 through the hose. The air guide plate 58 transmits the air to the vent plate 59 and sprays it out. The vent plate 59 injects air from the bottom of the activated carbon adsorption plate 32 into the activated carbon adsorption plate 32. Driven by the airflow, impurities and deposits on the surface of the activated carbon adsorption plate 32 are blown away or removed, similar to physical backflushing. This helps maintain the long-term performance of the activated carbon adsorption plate 32. The adsorption capacity is enhanced to prevent the adsorption layer from being clogged by impurities. Each time the L-shaped groove plate 52 moves away from the folded capsule 55, the L-shaped groove plate 52 stretches the folded capsule 55 via the T-shaped pressure plate 54. Air enters the folded capsule 55 through the one-way air inlet 57, thus replenishing the air inside the folded capsule 55. Simultaneously, during each reciprocating movement of the L-shaped groove plate 52, the L-shaped groove plate 52 drives the air guide plate 58 to reciprocate via the U-shaped connecting rod 510. The air guide plate 58 drives the perforated plate 59 to reciprocate at the bottom of the activated carbon adsorption plate 32. The reciprocating motion of the air guide plate 58 ensures a uniform distribution of air at the bottom of the activated carbon adsorption plate 32, and the movement of the perforated plate 59 at the bottom helps to achieve a periodic and uniform distribution of airflow, avoiding airflow in a single direction or concentrated area. This is highly beneficial to the cleaning and adsorption capacity of the activated carbon.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A groundwater heavy metal pollution remediation device based on self-remediation, comprising a treatment tank (1), characterized in that: A water pump (2) is fixed to the top of the treatment tank (1). A treatment device (3) is installed inside the treatment tank (1). The treatment device (3) includes a water injection tank (31) fixed to the top of the treatment tank (1) and a spray pipe (37) rotatably installed inside the treatment tank (1). A water receiving tank (33) is fixed to the bottom of the water injection tank (31). A Z-shaped flow channel is formed between the water injection tank (31) and the water receiving tank (33). An activated carbon adsorption plate (32) is fixed inside the water injection tank (31). A bio-adsorption plate (34) is fixed inside the water receiving tank (33), a guide plate (35) is fixed at the bottom of the water receiving tank (33), a through-hole plate (36) is fixed between the guide plate (35) and the inner wall of the treatment box (1), the spray pipe (37) is driven by a motor, and the motor is fixed to the outer wall of the treatment box (1) by a U-shaped bracket. The spray pipe (37) is located above the through-hole plate (36), and a drug injection device (39) for injecting drugs into the spray pipe (37) is provided on one side of the spray pipe (37).

2. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 1, characterized in that: The outer circumference of the spray pipe (37) is uniformly fixed with several stirring blades (38).

3. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 1, characterized in that: The injection unit (39) includes a medicine box (391) fixed outside the treatment box (1), a pump (392) fixed at the bottom of the medicine box (391), and an injection ring (394) fixed at the bottom of the pump (392) through a conduit (393). The injection ring (394) is located outside the spray pipe (37).

4. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 3, characterized in that: The spray pipe (37) has an inlet on its exterior that communicates with the inside of the injection ring (394).

5. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 1, characterized in that: An anti-accumulation device (4) is provided at the water injection pool (31). The anti-accumulation device (4) includes a screw (41) rotatably installed on the top of the water injection pool (31), a pulley (42) fixed to one end of the screw (41), a pulley (43) fixed to one end of the spray pipe (37), and a friction plate (48) fixed to one side of the inner wall of the water injection pool (31). The pulley (42) and the pulley (43) are connected by belt drive. The screw (41) is externally threaded with a U-shaped frame (44), and the U-shaped frame (44) is slidably installed between the inner wall of the water injection pool (31) and the friction plate (48). A push plate (47) is rotatably installed inside the U-shaped frame (44). A stop bar (45) is fixed on one side of the inside of the U-shaped frame (44) to limit the push plate (47) from rotating to one side. A friction wheel (46) is fixed at one end of the rotating shaft of the push plate (47).

6. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 5, characterized in that: The outer surface of the friction wheel (46) and the top surface of the friction plate (48) are both rough surfaces, and the outer surface of the friction wheel (46) is in contact with the top surface of the friction plate (48).

7. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 5, characterized in that: An air injection device (5) is provided at the water receiving pool (33). The air injection device (5) includes a U-shaped rod (51) fixed to the outer wall of the water receiving pool (33), an L-shaped groove plate (52) slidably installed on the top of the U-shaped rod (51), an L-shaped column rod (53) fixed to the outside of the pulley (42), and a fixing plate (56) fixed to the outer wall of the water receiving pool (33). A through groove is provided on the outer wall of the vertical support rod of the L-shaped groove plate (52). The end of the L-shaped column rod (53) away from the pulley (42) is slidably installed inside the through groove of the vertical support rod of the L-shaped groove plate (52). A folding bag (55) is fixed on the side of the fixing plate (56) near the pulley (42). A T-shaped pressure plate (54) is fixed between the folded bladder (55) and the vertical support rod of the L-shaped groove plate (52). A one-way air inlet (57) for controlling the one-way air intake of the folded bladder (55) is fixed to the outside of the fixing plate (56). A guide plate (58) is horizontally installed on the side of the water receiving tank (33) away from the treatment box (1). The guide plate (58) is used to control the one-way air output of the folded bladder (55). Several perforated plates (59) are fixed on the outer wall of the guide plate (58). The top of the perforated plate (59) is in contact with the bottom of the activated carbon adsorption plate (32). The guide plate (58) and the folded bladder (55) are connected by a hose.

8. The groundwater heavy metal pollution remediation device based on self-remediation according to claim 7, characterized in that: The top of the air guide plate (58) is connected to the top of the horizontal support rod of the L-shaped groove plate (52) by a U-shaped connecting rod (510).

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