A multi-stage environmental protection remediation treatment device and method for contaminated groundwater

Abstract

This application relates to the technical field of contaminated groundwater remediation, disclosing a multi-stage environmentally friendly remediation treatment device for contaminated groundwater. The device comprises a treatment well, a partition, an isolation member, and a pumping pipe. The device comprises two partitions arranged sequentially along the height of the treatment well, and the two partitions and the treatment well wall together enclose a sealed chamber. The isolation member is detachably disposed between the two partitions, separating the sealed chamber into a first chamber and a second chamber. The position of the isolation member relative to the partition can be adjusted to adjust the size of the first and second chambers. The pumping pipe passes through the upper partition of the two partitions and enters the first chamber. This application can reduce the waste of reagents.

Description

Technical Field

[0001] The present application relates to the technical field of contaminated groundwater remediation, and in particular to a multi-stage environmentally friendly remediation treatment device and method for contaminated groundwater. Background Art

[0002] During the land development and utilization process, the approval process for new land uses requires testing for soil and groundwater contamination. Approval is granted only when indicators meet standards. Some construction sites may have previously been industrial sites for chemical, electroplating, or petroleum industries, where soil and groundwater often have varying degrees of contamination and require remediation to meet standards before reuse.

[0003] Currently, common groundwater remediation methods primarily involve extracting groundwater from a treatment well for treatment and then injecting a remediation agent into the well, which then penetrates the soil through the well walls. Dividers divide the well into sections, allowing remediation agents to be administered to specific areas of contamination. For example, patent publication number CN111960484A discloses a method for isolating the space within a remediation well using upper and lower barriers.

[0004] In actual contaminated sites, the pollution plume will be distributed asymmetrically, resulting in the pollution plume distribution area possibly being on one side of the treatment well. However, when the agent penetrates from the treatment well, it diffuses circumferentially from the designated section of the treatment well, so that part of the agent will flow into the area without pollution plume in the soil during the diffusion, resulting in a waste of agent. Summary of the Invention

[0005] In order to reduce the waste of chemicals, the present application provides a multi-stage environmental protection remediation treatment device for contaminated groundwater.

[0006] In the first aspect, the present application provides a multi-stage environmental protection remediation treatment device for contaminated groundwater, which adopts the following technical solution:

[0007] A multi-stage environmental protection remediation treatment device for contaminated groundwater, comprising a treatment well, a partition, an isolation member and a pumping pipe; the partition has two members and is arranged in sequence along the height direction of the treatment well, and the two partitions and the wall of the treatment well together enclose a sealed cavity; the isolation member is detachably arranged between the two partitions, and is used to isolate the sealed cavity into a first chamber and a second chamber, and by adjusting the position of the isolation member relative to the partition, the sizes of the first chamber and the second chamber can be adjusted; the pumping pipe passes through the upper partition of the two partitions and enters the first chamber.

[0008] By adopting the above technical solution, two partitions are set up to enclose a sealed chamber with the wall of the treatment well, and the sealed chamber is separated into a first chamber and a second chamber by a detachable partition. The sizes of the first chamber and the second chamber can be flexibly adjusted according to the asymmetric distribution of the pollution plume, so that the remediation agent can be more accurately delivered to the contaminated area, reducing the diffusion waste of the agent to the area without pollution plume and improving the utilization rate of the agent.

[0009] Optionally, the partition is expanded by inflation to press against the treatment well and the isolation member.

[0010] By adopting the above technical solution, the partition is expanded by inflation to press against the treatment well and the isolation piece, so that the partition can fit tightly against the inner wall of the treatment well, effectively isolating different chambers, preventing the leakage of agents between different chambers, and improving the independence of each chamber and the accuracy of the placement of repair agents.

[0011] Optionally, a mounting rod is coaxially passed through the two partitions, and the isolation member includes two partitions, each of which has a sleeve sleeved on the mounting rod, the sleeves of the two partitions are axially opposed to each other along the treatment well, and the two partitions are distributed circumferentially along the treatment well.

[0012] By adopting the above technical solution, the first chamber and the second chamber can be isolated by the partitions distributed along the circumference of the processing well.

[0013] Optionally, two locking seats are provided on the mounting rod along the axial direction of the treatment well, and the locking seats are provided with a plurality of slots spaced apart along the circumference of the treatment well. The slots of the two locking seats are opposite to each other, and the two partitions are respectively inserted into different slots.

[0014] By adopting the above technical solution, the two locking seats mounted on the mounting rod relatively clamp the partition through the slot, which can further fix the position of the isolation member, prevent the isolation member from moving relative to each other during use, and keep the sizes of the first chamber and the second chamber stable after adjustment.

[0015] Optionally, the two locking seats are both threadedly sleeved on the mounting rod and jointly clamp all the sleeves on the mounting rod, and the threads of the two locking seats are in opposite directions.

[0016] By adopting the above technical solution, the positions of the two locking seats can be adjusted simultaneously by relatively rotating the mounting rod and the locking seat, thereby realizing rapid locking and unlocking of the partition.

[0017] Optionally, a sealing plate is provided in the partition that moves radially along the treatment well, and the sealing plate is used to move out of the partition to press against the inner wall of the treatment well. A pushing component is provided between the partition and the partition for driving the sealing plate to move; when the partition is in a deflated state, the sealing plate is accommodated in the partition, and when the partition is in an inflated state, the partition drives the pushing component to move, so that the pushing component pushes the sealing plate out of the partition.

[0018] By adopting this technical solution, the push assembly drives the sealing plate to move against the inner wall of the treatment well. When the partition is deflated, the sealing plate is stored in the partition, without affecting the installation and removal of the device. When the partition is inflated, the sealing plate pushes out of the partition and presses against the inner wall of the treatment well, further enhancing the sealing effect and preventing the repair agent from leaking between the partition and the inner wall of the treatment well.

[0019] Optionally, the pushing component includes

[0020] A movable seat abuts against one end of the partition member facing the sealing cavity and is sleeved with the mounting rod;

[0021] A push rod moves axially along the treatment well in the partition, the sealing plate having a guide slope for one end of the push rod to abut against, and the other end of the push rod is on the moving seat; and

[0022] an elastic member, disposed between the sealing plate and the partition, and configured to impart elastic force to the sealing plate to move in a direction of being accommodated in the partition;

[0023] Among them, when the partition is in a deflated state, the sealing plate is pulled by the elastic member and accommodated in the partition; when the partition is in an inflated state, the partition pushes the movable seat to press against the locking seat and the partition, and at the same time, the movable seat pushes the sealing plate through the push rod, so that the sealing plate extends out of the partition and presses against the inner wall of the treatment well.

[0024] By adopting the above technical solution, the sealing plate can be automatically pushed out by inflating the partition.

[0025] Optionally, a threaded sleeve on the mounting rod is provided with a shift blocking seat, and the shift blocking seat has a plurality of centering rods along its circumference that abut the inner wall of the treatment well; the partition is fixed with a partition ring on the inner cavity wall of the partition away from the end of the movable seat. When the partition is in a deflated state, the partition ring can be clamped between the shift blocking seat and the movable seat through the outer skin of the partition to isolate the inner cavity of the partition corresponding to the inner and outer sides of the partition ring.

[0026] By adopting the above technical solution, the installation rod is kept in a centered state in the treatment well by the centering rod, thereby improving the stability of the device.

[0027] In a second aspect, the present application provides a multi-stage environmental remediation method for contaminated groundwater, comprising the following steps:

[0028] S1, sampling and testing groundwater and soil in the area to be treated to determine the distribution range of the pollution plume and the concentration of pollutants;

[0029] S2, installing a treatment well in the treatment area, extracting groundwater through a pumping pipe and purifying the groundwater;

[0030] S3, placing the partition, the isolation member, and the extraction pipe into the treatment well so that the first chamber faces the contamination plume distribution area, and then injecting a remediation agent into the first chamber through the extraction pipe so that the remediation agent directionally penetrates from the well wall area corresponding to the first chamber to the contamination plume distribution area;

[0031] S4, after monitoring that soil pollutants meet the standards, the purified groundwater will be recharged back into the soil.

[0032] In summary, this application has at least one of the following beneficial effects:

[0033] 1. A sealed first chamber is formed by enclosing two partitions and a spacer. The size of the first chamber can be adjusted by adjusting the position of the partition. This allows the area where the agent escapes from the treatment well to be adjusted according to the distribution of the contaminated plume in the contaminated site, thereby improving agent utilization and reducing agent waste.

[0034] 2. The isolating member, the locking seat, the moving seat, the partitioning member and the shift-blocking seat can be detachably installed in sequence through the mounting rod to improve the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a top view of an embodiment of the present application;

[0036] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at AA in the middle;

[0037] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0038] Figure 4 This is a schematic diagram of the structure of the locking seat and the isolation member in the embodiment of the present application;

[0039] Figure 5 This is a schematic diagram of the explosion structure of a group of isolation members in an embodiment of the present application;

[0040] Figure 6 This is a schematic diagram of the structure of the push rod and the sealing plate in the embodiment of the present application;

[0041] Figure 7 This is a structural diagram of an embodiment of the present application in which there is a gap between the movable seat and the locking seat.

[0042] Explanation of the accompanying drawings: 1. Processing well; 2. Partition; 3. Isolation piece; 31. Partition; 32. Sleeve; 4. Pumping and discharge pipe; 5. Sealing chamber; 6. First chamber; 7. Second chamber; 8. Mounting rod; 9. Locking seat; 10. Slot; 11. Sealing plate; 12. Moving seat; 13. Push rod; 14. Guide slope; 15. Elastic member; 16. Blocking seat; 17. Centering rod; 18. Partition ring; 19. Inflation tube; 20. First through hole; 21. Second through hole; 22. Mounting hole; 23. Connecting ring groove; 24. First guide portion; 25. Accommodating chamber; 26. Second guide portion. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1 To the attached Figure 7 This application is described in further detail.

[0044] The embodiment of the present application discloses a multi-stage environmental protection remediation treatment device for contaminated groundwater. Figure 1 and Figure 2 The multi-stage environmental protection remediation treatment device for contaminated groundwater includes a treatment well 1, and a partition 2, an isolation member 3 and a pumping pipe 4 installed in the treatment well 1.

[0045] Treatment well 1 is cylindrical and installed in the remediation site with its axis extending vertically. Its walls are arrayed with permeable holes, and its outer wall is covered with a permeable geotextile. This allows for water exchange between the inside and outside of the well, while the geotextile filters out impurities. Both the permeable holes and the geotextile are existing technologies for permeating water through the well, so detailed descriptions are omitted from the figure.

[0046] Reference Figure 2 and Figure 3The partition 2 is in the shape of a hollow disc and is made of a flexible material such as rubber, silicone or nylon. The partition 2 is expanded by inflation and collapses by deflation. There are two partitions 2 and they are distributed in the treatment well 1 in sequence along the height direction of the treatment well 1. When the partition 2 is inflated, the two partitions 2 and the wall of the treatment well 1 together enclose a sealed cavity 5. Among them, each partition 2 is connected to an inflation tube 19 for inflation. The upper partition 2 of the two partitions 2 is provided with a first perforation 20 and a second perforation 21. The first perforation 20 is used for the pumping pipe 4 to pass through the partition 2 and enter the sealed cavity 5, and the second perforation 21 is used for the inflation tube 19 of the lower partition 2 to pass through. The first perforation 20 and the second perforation 21 are both offset from the center of the partition 2, and the first perforation 20 and the second perforation 21 are completely isolated from the inner cavity of the partition 2.

[0047] The spacers 3 are detachably connected between the two partitions 2, and at least one group is distributed axially along the treatment well 1. The two partitions 2 and the spacers 3 are mounted via a mounting rod 8, a shift-blocking seat 16, and a locking seat 9.

[0048] Reference Figure 2 and Figure 3 Specifically, a mounting rod 8 is coaxially threaded through two partitions 2 in sequence along the height of the treatment well 1. The partitions 2 have mounting holes 22 for receiving the mounting rod 8. The mounting holes 22 are completely isolated from the inner cavity of the partitions 2. The mounting rod 8 is a bidirectional screw, with a forward-rotating portion and a reverse-rotating portion extending from the center toward each end. The junction of the forward-rotating and reverse-rotating portions is located between the two partitions 2.

[0049] The shift-blocking seats 16 are annular and correspond one-to-one with the separators 2. The two shift-blocking seats 16 are respectively coaxially threadedly sleeved on the forward-rotating portion and the reverse-rotating portion, and the shift-blocking seats 16 are relative to the end of the corresponding separator 2 facing away from the sealed chamber 5, so as to confine the two separators 2 between the two shift-blocking seats 16. The locking seats 9 are annular and correspond one-to-one with the separators 2. The outer diameter of the locking seats 9 is smaller than the outer diameter of the shift-blocking seats 16. The two locking seats 9 are respectively coaxially threadedly sleeved on the forward-rotating portion and the reverse-rotating portion, and the locking seats 9 are relative to the end of the corresponding separator 2 facing the sealed chamber 5, so as to confine each separator 2 between its corresponding shift-blocking seat 16 and the locking seat 9.

[0050] Reference Figure 2 and Figure 4 It should be noted that a card slot 10 is provided on the opposite side of the two locking seats 9, and multiple card slots 10 are evenly spaced along the circumference of the locking seat 9, and a connecting annular groove 23 with a depth consistent with the depth of the card slot 10 is coaxially provided at the center of the locking seat 9. The connecting annular groove 23 connects all the card slots 10 on the same locking seat 9.

[0051] Reference Figure 4 and Figure 5The isolators 3 are located between the two locking seats 9. Each set of isolators 3 includes two partitions 31. The partitions 31 are in the shape of square plates with vertically extending surfaces. A sleeve 32 for sleeve-mounting the mounting rod 8 is fixed to one side of the partitions 31. The vertical extension height of the sleeve 32 is half the height of the partitions 31, and one end of the sleeve 32 is flush with the end of one end of the partitions 31. In the same set of isolators 3, the sleeve 32 of one partition 31 is located on the upper side of the partition 31, and the sleeve 32 of the other partition 31 is located on the lower side of the partition 31. When the isolators 3 are engaged with the mounting rod 8, the sleeves 32 of the two partitions 31 are vertically distributed and abut against each other. At the same time, the two partitions 31 are circumferentially distributed along the mounting rod 8.

[0052] The number of groups of isolators 3 can be one or two. By adjusting the number of groups of isolators 3, the distance between the two partitions 2 can be adjusted, thereby adjusting the size of the sealed cavity 5 as needed. When the number of groups of isolators 3 is one, the sleeves 32 of the two partitions 31 in the isolators 3 are respectively inserted into the connecting annular grooves 23 of the upper and lower locking seats 9. The top ends of the two partitions 31 are inserted into the slots 10 located in the upper locking seat 9, and the bottom ends of the two partitions 31 are inserted into the slots 10 located in the lower locking seat 9. The two partitions 31 are inserted into different slots 10 on the same locking seat 9, so that an angle is formed between the two partitions 31.

[0053] When there are two groups of isolators 3, the partitions 31 of the two groups correspond to each other, and the corresponding partitions 31 overlap and abut against each other vertically. The sleeves 32 of the two groups of isolators 3 also overlap and abut against each other vertically. Simultaneously, the sleeves 32 at the top abut against the connecting annular groove 23 of the upper locking seat 9, the partitions 31 at the top abut against the retaining groove 10 of the upper locking seat 9, the sleeves 32 at the bottom abut against the connecting annular groove 23 of the lower locking seat 9, and the partitions 31 at the bottom abut against the retaining groove 10 of the lower locking seat 9. Furthermore, to improve the stability between the two groups of isolators 3, an insert (not shown) can be fixed at the bottom end of the partitions 31 in the upper isolator 3, and a slot for inserting the insert can be provided at the top end of the partitions 31 in the lower isolator 3, so that the partitions 31 of the two groups of isolators 3 are connected by inserting the insert into the slot. In this embodiment, the isolators 3 are arranged in two groups.

[0054] Regardless of whether the isolation members 3 are one group or two groups, when the two locking seats 9 are engaged with the isolation members 3, the isolation members 3 are rotated axially relative to the mounting rod 8 around the mounting rod 8, driving the locking seats 9 to rotate relative to the mounting rod 8, so that the two locking seats 9 move toward each other until they are close to the partition 31 and the sleeve 32, so as to achieve sealing between different groups of isolation members 3 and between the isolation members 3 and the locking seats 9.

[0055] Reference Figure 2 and Figure 4When the partition 2 is inflated and the extraction pipe 4 enters the sealed chamber 5, the partition 2 simultaneously embraces the extraction pipe 4 and the corresponding end of the isolation member 3, thereby achieving a seal between the isolation member 3 and the partition 2. As a result, the partition 31 divides the sealed chamber 5 into a first chamber 6 and a second chamber 7, which are isolated from each other and distributed circumferentially along the treatment well 1. The first chamber 6 faces the soil containing the contaminated plume. The extraction pipe 4 enters the first chamber 6, and the chemical is introduced into the first chamber 6 through the extraction pipe 4. The chemical enters the soil to be remediated from the well wall of the treatment well 1 opposite the first chamber 6, thereby limiting the direction of chemical diffusion. It should be noted that by snapping the partition 31 into different slots 10, the angle between the two partitions 31 in the same set of isolation members 3 can be adjusted, thereby adjusting the size range of the first chamber 6 and the second chamber 7.

[0056] Reference Figure 1 and Figure 3 Furthermore, in order to improve the stability of the partition 2 and the isolation member 3 from the bottom to the processing well 1, a plurality of centering rods 17 are fixed at even intervals along the circumference of the outer periphery of the displacement seat 16. Each centering rod 17 extends radially along the displacement seat 16, and the distance between the end of the centering rod 17 away from the displacement seat 16 and the axis of the mounting rod 8 is consistent with the inner radius of the processing well 1. In the process of lowering the partition 2 to the processing well 1, the end of each centering rod 17 away from the displacement seat 16 abuts against the inner wall of the processing well 1, so that the mounting rod 8 and the processing well 1 remain concentric when the partition 2 is in the processing well 1. In order to improve the smoothness of the movement of the centering rod 17 in the processing well 1, the end surface of the centering rod 17 that touches the processing well 1 is a smooth surface.

[0057] Reference Figure 5 and Figure 6 Furthermore, to improve the seal between the partition 31 and the inner wall of the treatment well 1, a sealing plate 11 is disposed within the partition 31 for radial movement along the treatment well 1. The partition 31 has a movable cavity for movement of the sealing plate 11. The vertical height of the sealing plate 11 is consistent with that of the partition 31, and the sealing plate 11 has a first guide portion 24. A first guide groove (not shown) is defined on the inner wall of the movable cavity of the partition 31 for radial sliding movement of the first guide portion 24 along the treatment well 1, thereby guiding the movement of the sealing plate 11. The side of the partition 31 facing away from the sleeve 32 is made of a rubber sealing strip.

[0058] Reference Figure 3 and Figure 4A pushing assembly is provided between the partition 31 and the partition 2, and the pushing assembly is used to drive the partition 31 to move. When the partition 2 is in the deflated state, the operator lowers the partition 2, the isolation 3 and the pumping pipe 4 to the processing well 1. At this time, the sealing plate 11 is accommodated in the partition 31, and a gap is left between the partition 31 and the inner wall of the processing well 1 for the partition 31 to be smoothly moved into the processing well 1. When the partition 2 and the isolation 3 reach the set position, the partition 2 is inflated. At this time, the pushing assembly pushes the sealing plate 11 away from the side of the mounting rod 8 to move out of the partition 31 away from the mounting rod 8 and press against the inner wall of the processing well 1 to achieve sealing between the isolation 3 and the processing well 1.

[0059] Specifically, the pushing assembly includes a movable seat 12, a push rod 13, and an elastic member 15. The movable seat 12 is in the shape of a dome and is coaxially sleeved on the mounting rod 8 and located between the partition 2 and the locking seat 9. The partition 2 has a stepped groove to make way for the movable seat 12, and the movable seat 12 has an accommodating cavity 25 facing the locking seat 9. The cross-sectional dimensions of the accommodating cavity 25 are consistent with those of the locking seat 9 and are used to sleeve the locking seat 9.

[0060] Reference Figure 4 and Figure 6 Push rod 13 moves axially parallel to treatment well 1 within partition 31. Push rod 13 has a second guide portion 26. A second guide groove (not shown) is defined in the inner wall of the movement chamber of partition 31 for sliding movement of second guide portion 26 axially parallel to treatment well 1. The second guide groove extends through the upper and lower ends of partition 31 to facilitate alignment of push rod 13. Sealing plate 11 has inclined guide surfaces 14 on both its upper and lower sides. These surfaces are mirror-symmetrical along the horizontal centerline of sealing plate 11, and the vertical distance between the two inclined guide surfaces 14 increases gradually as they move away from mounting rod 8.

[0061] The push rod 13 is assembled between the partition 31 and the adjacent movable seat 12. One end of the push rod 13 abuts the outer edge of the movable seat 12, and the other opposite end of the push rod 13 extends into the movable cavity and abuts on a guide slope 14 of the partition 31. In other words, when the device uses a single set of spacers 3, push rods 13 are assembled at both the upper and lower ends of the partition 31. When the device uses two sets of spacers 3, push rods 13 are assembled at the ends of the spacers 31 of the two sets of spacers 3 that are separated from each other.

[0062] The elastic member 15 is a spring, which is located in the movable cavity, and the two ends of the elastic member 15 are respectively connected to the inner wall of the partition 31 and the sealing plate 11. The elastic force of the elastic member 15 gives the sealing plate 11 a tendency to move toward the mounting rod 8 to be accommodated in the partition 31.

[0063] Reference Figure 4 and Figure 7When the partition 2 is in the deflated state, the sealing plate 11 pushes the movable seat 12 away from the locking seat 9 through the push rod 13, so that there is a gap between the inner end wall of the accommodating cavity 25 of the movable seat 12 and the locking seat 9.

[0064] Reference Figure 3 and Figure 4 When the partition 2 is inflated, the expanded partition 2 pushes the movable seat 12 toward the locking seat 9, so that the inner end wall of the accommodating cavity 25 of the movable seat 12 is pressed against the locking seat 9, and the outer edge of the movable seat 12 is pressed against the end surface of the partition 31. During the process, the movable seat 12 pushes the push rod 13 to move in the direction of extending into the partition 31. The push rod 13 overcomes the elastic force of the elastic member 15 and is accommodated in the partition 31. The push rod 13 pushes the sealing plate 11 to move in the direction of extending out of the partition 31 through the guide inclined surface 14, so that the side of the sealing plate 11 with the rubber sealing strip is pressed against the inner wall of the treatment well 1.

[0065] Reference Figure 3 、 Figure 4 and Figure 7 In addition, the partition member 2 is coaxially provided with a partition ring 18 in its own inner cavity. The diameter of the partition ring 18 is larger than the aperture of the mounting hole 22 and smaller than the outer diameter of the blocking seat 16 and the moving seat 12. At the same time, the partition ring 18 is fixed on the inner end wall of the partition member 2 away from the sealing cavity 5.

[0066] When the partition 2 is in the deflated state, the movable seat 12 is supported by the push rod 13 and moves away from the locking seat 9, so that the partition ring 18 can be clamped between the movable seat 12 and the blocking seat 16 across the outer skin of the partition 2, so that the inner cavities of the partition 2 on both sides of the partition ring 18 are isolated by the partition ring 18. The inflation tube 19 is connected to the cavity opposite to the inner periphery of the partition ring 18. When the inflation tube 19 inflates the partition 2, the gas first enters the cavity opposite to the inner periphery of the partition ring 18. After filling, the gas pressure will push the movable seat 12 to move toward the blocking seat 16, so that the movable seat 12 pushes the sealing plate 11 against the inner wall of the treatment well 1 through the push rod 13. At the same time, a gap for gas to pass appears between the partition ring 18 and the inner end wall of the partition 2 close to the sealing cavity 5, so that the gas enters the cavity opposite to the outer periphery of the partition ring 18 and gradually expands the partition 2. Therefore, the position of the blocking seat 16 can be quickly determined by the isolating ring 18 , and the gas can be assisted in pushing the moving seat 12 .

[0067] The present application also discloses a multi-stage environmental remediation method for contaminated groundwater, comprising the following steps:

[0068] S1, sampling and testing groundwater and soil in the area to be treated to determine the distribution range of the pollution plume and the concentration of pollutants;

[0069] S2, installing a treatment well 1 in the treatment area, extracting groundwater through the extraction pipe 4 and purifying the groundwater;

[0070] S3: Assemble the partition 2, the isolation member 3, and the extraction pipe 4 to the mounting rod 8 and place them into the treatment well 1, so that the first chamber 6 faces the pollution plume distribution area. Then, inflate the partition 2 so that the partition 2 and the isolation member 3 together isolate the first chamber 6 from the rest of the treatment well 1. Then, inject a remediation agent into the first chamber 6 through the extraction pipe 4, so that the remediation agent directionally penetrates from the well wall area corresponding to the first chamber 6 to the pollution plume distribution area.

[0071] S4, after monitoring that soil pollutants meet the standards, the purified groundwater will be recharged back into the soil.

[0072] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-stage environmental protection remediation device for contaminated groundwater, characterized by: It comprises a processing well (1), a partition (2), an isolation member (3) and a pumping pipe (4); the partition (2) has two and is arranged in sequence along the height direction of the processing well (1), and the two partitions (2) and the wall of the processing well (1) together enclose a sealed cavity (5); the isolation member (3) is detachably arranged between the two partitions (2) and is used to isolate the sealed cavity (5) into a first chamber (6) and a second chamber (7), and by adjusting the position of the isolation member (3) relative to the partition (2), the size of the first chamber (6) and the second chamber (7) can be adjusted; the pumping pipe (4) passes through the upper partition (2) of the two partitions (2) and enters the first chamber (6); the partition (2) is pressed against the processing well (1) and the isolation member (3) by inflation expansion.

2. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 1, characterized in that: A mounting rod (8) is coaxially passed through the two partitions (2), and the isolation member (3) includes two partitions (31). Both partitions (31) have sleeves (32) sleeved on the mounting rod (8). The sleeves (32) of the two partitions (31) abut against each other axially along the treatment well (1), and the two partitions (31) are distributed circumferentially along the treatment well (1).

3. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 2, characterized in that: Two locking seats (9) are sleeved axially along the treatment well (1) on the mounting rod (8), and a plurality of slots (10) are arranged on the locking seat (9) at intervals along the circumference of the treatment well (1). The slots (10) of the two locking seats (9) are opposite to each other, and the two partitions (31) are respectively inserted into different slots (10).

4. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 3, characterized in that: The two locking seats (9) are both threadedly sleeved on the mounting rod (8) and jointly clamp all the sleeves (32) on the mounting rod (8), and the threads of the two locking seats (9) are in opposite directions.

5. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 3, characterized in that: A sealing plate (11) is provided in the partition (31) and moves radially along the treatment well (1). The sealing plate (11) is used to move out of the partition (31) to press against the inner wall of the treatment well (1). A pushing component is provided between the partition (31) and the partition (2) for driving the sealing plate (11) to move. When the partition (2) is in a deflated state, the sealing plate (11) is accommodated in the partition (31). When the partition (2) is in an inflated state, the partition (2) drives the pushing component to move, so that the pushing component pushes the sealing plate (11) out of the partition (31).

6. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 5, characterized in that: The pushing component includes A movable seat (12) abuts against one end of the partition (2) facing the sealing cavity (5) and is sleeved with the mounting rod (8); A push rod (13) moves axially along the treatment well (1) in the partition (31), the sealing plate (11) having a guide slope (14) for one end of the push rod (13) to abut against, and the other end of the push rod (13) is on the moving seat (12); and an elastic member (15) disposed between the sealing plate (11) and the partition (31) and used to impart elastic force to the sealing plate (11) to move in a direction to be accommodated in the partition (31); When the partition (2) is in a deflated state, the sealing plate (11) is pulled by the elastic member (15) and accommodated in the partition (31); when the partition (2) is in an inflated state, the partition (2) pushes the movable seat (12) to press against the locking seat (9) and the partition (31), and at the same time, the movable seat (12) pushes the sealing plate (11) through the push rod (13), so that the sealing plate (11) extends out of the partition (31) and presses against the inner wall of the treatment well (1).

7. The multi-stage environmental protection remediation device for contaminated groundwater according to claim 6, characterized in that: A threaded sleeve on the mounting rod (8) is provided with a shift block (16), and the shift block (16) has a plurality of centering rods (17) along its own circumference that abut against the inner wall of the treatment well (1); the partition (2) is fixed with a partition ring (18) on its inner cavity wall away from the end of the movable seat (12). When the partition (2) is in a deflated state, the partition ring (18) can be clamped between the shift block (16) and the movable seat (12) through the outer skin of the partition (2) to isolate the inner cavity of the partition (2) corresponding to the inner and outer sides of the partition ring (18).

8. A multi-stage environmental remediation method for contaminated groundwater, applicable to the multi-stage environmental remediation device for contaminated groundwater according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, sampling and testing groundwater and soil in the area to be treated to determine the distribution range of the pollution plume and the concentration of pollutants; S2, installing a treatment well (1) in the treatment area, extracting groundwater through a pumping pipe (4) and purifying the groundwater; S3, after assembling the partition (2), the isolation member (3) and the extraction pipe (4), the partition (2) and the extraction pipe (4) are placed in the treatment well (1), so that the first chamber (6) is opposite to the pollution plume distribution area, and then the repair agent is added into the first chamber (6) through the extraction pipe (4), so that the repair agent is directionally infiltrated from the well wall area corresponding to the first chamber (6) to the pollution plume distribution area; S4, after monitoring that soil pollutants meet the standards, the purified groundwater will be recharged back into the soil.

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