Multi-stage environment-friendly remediation treatment device and method for polluted underground water

Abstract

The invention relates to the technical field of polluted groundwater remediation, and discloses a multi-stage environment-friendly remediation treatment device for polluted groundwater, which comprises a treatment well, a separator, a separator and a drainage pipe, the two partition pieces are sequentially arranged in the height direction of the treatment well, and a sealing cavity is defined by the two partition pieces and the well wall of the treatment well; the separators are detachably arranged between the two separators and used for separating the sealing cavity into a first cavity and a second cavity, and the sizes of the first cavity and the second cavity can be adjusted by adjusting the positions of the separators relative to the separators; the drainage pipe penetrates through the upper partition piece in the two partition pieces and enters the first cavity. According to the invention, the waste of medicaments can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of contaminated groundwater remediation, and particularly to a multi-stage environmental protection remediation treatment device and method for contaminated groundwater. Background Art

[0002] During the process of land development and utilization, the approval process for new land uses requires testing the soil and groundwater pollution conditions of the land. Only when the indicators meet the standards can the approval be obtained. The original sites of some construction sites may have been industrial sites such as chemical plants, electroplating plants, and oil fields, and their soil and groundwater are often contaminated to varying degrees and need to be remediated to meet the standards before they can be reused.

[0003] Currently, common groundwater remediation methods mainly involve pumping groundwater out of treatment wells for treatment and injecting remediation agents into the treatment wells. The remediation agents penetrate into the soil through the well walls of the treatment wells. And the internal area of the treatment well is segmented by a separator, and the remediation agents are injected into the designated section to enable the injection of the agents according to the height range of the pollution. For example, referring to the patent document with the publication number CN111960484A, it discloses a solution for isolating the space in the remediation well by upper and lower barriers.

[0004] In actual contaminated sites, the pollution plume will be asymmetrically distributed, resulting in the possibility that the area where the pollution plume is distributed may be 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, causing some of the agents to flow into the area of the soil without the pollution plume during diffusion, resulting in waste of the agents. Summary of the Invention

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

[0006] In a first aspect, this application provides a multi-stage environmental protection remediation treatment device for contaminated groundwater, adopting the following technical solution: A multi-stage environmental protection remediation treatment device for contaminated groundwater includes a treatment well, a separator, an isolation member, and a pumping and discharging pipe; there are two separators which are arranged in sequence along the height direction of the treatment well, and the two separators and the well wall of the treatment well jointly enclose a sealed cavity; the isolation member is detachably arranged between the two separators 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 separator, the sizes of the first chamber and the second chamber can be adjusted; the pumping and discharging pipe passes through the separator located above the two separators and enters the first chamber.

[0007] By adopting the above technical solution, two partition members are arranged to enclose a sealing cavity with the inner wall of the treatment well, and the detachable isolation member is used to isolate the sealing cavity into a first chamber and a second chamber. In view of the asymmetric distribution of the pollution plume, the sizes of the first chamber and the second chamber can be flexibly adjusted, so that the repair agent can be more accurately delivered to the polluted area, reducing the diffusion waste of the agent to the area without pollution plume and improving the utilization rate of the agent.

[0008] Optionally, the partition member expands by inflation to abut against the treatment well and the isolation member.

[0009] By adopting the above technical solution, the partition member expands by inflation to abut against the treatment well and the isolation member, enabling the partition member to closely fit the inner wall of the treatment well, effectively isolating different chambers, preventing the leakage of the agent between different chambers, and improving the independence of each chamber and the accuracy of the delivery of the repair agent.

[0010] Optionally, an installation rod is coaxially penetrated through the two partition members. The isolation member includes two partition plates, and sleeves sleeved on the installation rod are provided on both partition plates. The sleeves of the two partition plates abut against each other along the axial direction of the treatment well, and the two partition plates are distributed along the circumferential direction of the treatment well.

[0011] By adopting the above technical solution, the first chamber and the second chamber can be isolated by the partition plates distributed along the circumferential direction of the treatment well.

[0012] Optionally, two locking seats are sleeved on the installation rod along the axial direction of the treatment well. A plurality of card slots are arranged at intervals along the circumferential direction of the treatment well on the locking seats. The card slots of the two locking seats face each other, and the two partition plates are respectively inserted into different card slots.

[0013] By adopting the above technical solution, the two locking seats sleeved on the installation rod relatively clamp the partition plates through the card slots, which can further fix the position of the isolation member, prevent the relative movement of the isolation member during use, and keep the sizes of the first chamber and the second chamber stable after adjustment.

[0014] Optionally, both of the two locking seats are threadedly sleeved on the installation rod and jointly clamp all the sleeves on the installation rod, and the threads of the two locking seats are in opposite directions.

[0015] By adopting the above technical solution, by relatively rotating the installation rod and the locking seats, the positions of the two locking seats can be adjusted simultaneously to achieve quick locking and unlocking of the partition plates.

[0016] 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 stored 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.

[0017] By adopting the above technical solution, the sealing plate is driven to move by the push assembly to press against the inner wall of the treatment well. When the partition is deflated, the sealing plate is stored in the partition, which does not affect the installation and removal of the device. When the partition is inflated, the sealing plate pushes the partition to press against the inner wall of the treatment well, further enhancing the sealing effect, making it difficult for the repair agent to leak from between the partition and the inner wall of the treatment well.

[0018] Optionally, the pushing component includes A movable seat abuts against one end of the partition member facing the sealing cavity and is sleeved with the mounting rod; A push rod moves axially along the treatment well in the partition, the sealing plate has 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 An elastic member, disposed between the sealing plate and the partition plate, and used to give the sealing plate an elastic force to move in a direction to be accommodated in the partition plate; Among them, when the partition is in a deflated state, the sealing plate is pulled by the elastic member and received 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.

[0019] By adopting the above technical solution, the sealing plate can be automatically pushed out by inflating the partition.

[0020] Optionally, a displacement blocking seat is provided on a threaded sleeve on the mounting rod, and the displacement blocking seat has a plurality of centering rods along its circumference that abut against the inner wall of the treatment well; the partition member is fixed with a partition ring on the inner cavity wall of the partition member at one end away from the movable seat, and when the partition member is in a deflated state, the partition ring can be clamped between the displacement blocking seat and the movable seat through the outer skin of the partition member to isolate the inner cavity of the partition member corresponding to the inner and outer sides of the partition ring.

[0021] 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.

[0022] Second aspect, the present application provides a multi-stage environmental protection restoration treatment method for contaminated groundwater, including the following steps: S1. Sampling and detecting groundwater and soil in the area to be treated to determine the distribution range of the pollution plume and the pollutant concentration; S2. Install treatment wells in the area to be treated, and pump out groundwater through the pumping pipes and carry out purification treatment of the groundwater; S3. After matching the partition member, the isolation member and the pumping pipe, place them into the treatment well, make the first chamber face the pollution plume distribution area, and then put the repair agent into the first chamber through the pumping pipe, so that the repair agent penetrates from the well wall area corresponding to the first chamber to the pollution plume distribution area directionally; S4. After monitoring that the soil pollutants meet the standards, recharge the purified groundwater back into the soil.

[0023] In summary, the present application includes at least one of the following beneficial effects: 1. A sealed first chamber is formed by enclosing with two partition members and the isolation member, and the size of the first chamber is adjusted by adjusting the position of the partition board, so as to be able to adjust the area where the agent escapes from the treatment well according to the distribution of the pollution plume in the polluted site, so as to improve the utilization rate of the agent and reduce the waste of the agent; 2. The isolation member, the locking seat, the moving seat, the partition member and the movement blocking seat are detachably installed in sequence through the installation rod, so as to improve the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the top view of the embodiment of the present application; Figure 2 is Figure 1 the enlarged structural schematic diagram at A-A in Figure 3 is Figure 2 the enlarged structural schematic diagram at B in Figure 4 is the structural schematic diagram of the cooperation between the locking seat and the isolation member in the embodiment of the present application; Figure 5 is the exploded structural schematic diagram of a group of isolation members in the embodiment of the present application; Figure 6 is the structural schematic diagram of the cooperation between the push rod and the sealing plate in the embodiment of the present application; Figure 7 is the structural schematic diagram when there is a gap between the moving seat and the locking seat in the embodiment of the present application.

[0025] Description of reference numerals: 1, treatment well; 2, partition member; 3, isolation member; 31, partition board; 32, sleeve; 4, extraction pipe; 5, sealing cavity; 6, first chamber; 7, second chamber; 8, mounting rod; 9, locking seat; 10, card slot; 11, sealing plate; 12, moving seat; 13, push rod; 14, guiding inclined surface; 15, elastic member; 16, displacement blocking seat; 17, centering rod; 18, partition ring; 19, charging pipe; 20, first perforation; 21, second perforation; 22, mounting hole; 23, communicating ring groove; 24, first guiding portion; 25, accommodating cavity; 26, second guiding portion. Detailed implementation manners

[0026] The following further describes the present application in detail with reference to Figure 1 to Figure 7 the accompanying drawings.

[0027] An embodiment of the present application discloses a multi - stage environmental protection restoration treatment device for polluted groundwater. Referring to Figure 1 and Figure 2 , the multi - stage environmental protection restoration treatment device for polluted groundwater includes a treatment well 1, and a partition member 2, an isolation member 3 and an extraction pipe 4 installed in the treatment well 1.

[0028] The treatment well 1 is in a cylindrical shape and is installed in the site to be restored with its axis extending vertically. The well wall of the treatment well 1 is distributed with water - permeable holes in an array, and the outer wall of the treatment well 1 is coated with a water - permeable geotextile, so that the inside and outside of the treatment well 1 are connected through the water - permeable holes for water flow exchange, and impurities are filtered through the water - permeable geotextile. The water - permeable holes and the water - permeable geotextile are both prior arts for the water permeability of the treatment well 1, and will not be elaborated here and are omitted in the drawings.

[0029] Referring to Figure 2 and Figure 3 , the partition member 2 is in a disk shape with a hollow interior and is made of a flexible material, such as rubber, silica gel or nylon, etc. The partition member 2 is expanded by inflation and collapses by deflation. There are two partition members 2, which are sequentially distributed in the treatment well 1 along the height direction of the treatment well 1. When the partition members 2 are inflated, the two partition members 2 and the well wall of the treatment well 1 jointly enclose a sealing cavity 5. Among them, each partition member 2 is connected with a charging pipe 19 for inflation. The upper partition member 2 among the two partition members 2 is provided with a first perforation 20 and a second perforation 21. The first perforation 20 is used for the extraction pipe 4 to penetrate through the partition member 2 and enter the sealing cavity 5, and the second perforation 21 is used for the charging pipe 19 of the lower partition member 2 to penetrate through. And both the first perforation 20 and the second perforation 21 are offset from the center of the partition member 2, and at the same time, both the first perforation 20 and the second perforation 21 are completely isolated from the inner cavity of the partition member 2.

[0030] The isolating element 3 is detachably connected between the two partitions 2, and at least one group is distributed along the axial direction of the treatment well 1. The two partitions 2 and the isolating element 3 are installed by means of the installation rod 8, the shift blocking seat 16 and the locking seat 9.

[0031] Reference Figure 2 and Figure 3 Specifically, the mounting rod 8 is coaxially arranged through the two partitions 2 in sequence along the height direction of the treatment well 1, and the partition 2 has a mounting hole 22 for sleeve mounting the mounting rod 8, and the mounting hole 22 is completely isolated from the inner cavity of the partition 2. The mounting rod 8 is a bidirectional screw, and the mounting rod 8 has a positive rotation part and a reverse rotation part respectively distributed from the center to both ends, and the junction of the positive rotation part and the reverse rotation part is located between the two partitions 2.

[0032] The shift-blocking seat 16 is annular and corresponds to the separator 2 one by one. The two shift-blocking seats 16 are respectively coaxially threadedly sleeved on the positive rotation part and the reverse rotation part, and the shift-blocking seat 16 is opposite to the end of the corresponding separator 2 away from the sealing chamber 5, so as to limit the two separators 2 between the two shift-blocking seats 16. The locking seat 9 is annular and corresponds to the separator 2 one by one. The outer diameter of the locking seat 9 is smaller than the outer diameter of the shift-blocking seat 16. The two locking seats 9 are respectively coaxially threadedly sleeved on the positive rotation part and the reverse rotation part, and the locking seat 9 is opposite to the end of the corresponding separator 2 facing the sealing chamber 5, so as to limit each separator 2 between its corresponding shift-blocking seat 16 and the locking seat 9.

[0033] Reference Figure 2 and Figure 4 It should be noted that a card slot 10 is provided on the opposite sides of the two locking seats 9, and a plurality of 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, and the connecting annular groove 23 connects all the card slots 10 on the same locking seat 9.

[0034] Reference Figure 4 and Figure 5 The isolating member 3 is located between the two locking seats 9. Each group of isolating members 3 includes two partitions 31. The partitions 31 are in the shape of square plates with the plate surface extending vertically. A sleeve 32 for sleeve-mounting the mounting rod 8 is fixed on one side of the partition 31. The vertical extension height of the sleeve 32 is half of the height of the partition 31, and the end of one end of the sleeve 32 is flush with the end of one end of the partition 31. In the same group of isolating members 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 isolating member 3 cooperates with the mounting rod 8, the sleeves 32 of the two partitions 31 are distributed in sequence in the vertical direction and abut against each other, and the two partitions 31 are distributed in sequence along the circumference of the mounting rod 8.

[0035] The number of groups of the spacer 3 can be one or two. By adjusting the number of groups of the spacer 3, the distance between the two partition members 2 can be adjusted, so as to adjust the size of the sealing cavity 5 according to requirements. When the number of groups of the spacer 3 is one, the sleeves 32 of the two partition plates 31 in the spacer 3 are respectively clamped into the communicating annular grooves 23 of the upper and lower locking seats 9, the tops of the two partition plates 31 are clamped into the card slots 10 of the upper locking seat 9, the bottoms of the two partition plates 31 are clamped into the card slots 10 of the lower locking seat 9, and the card slots 10 into which the two partition plates 31 are clamped on the same locking seat 9 are different, so that an included angle is formed between the two partition plates 31.

[0036] When the number of groups of the spacer 3 is two, the partition plates 31 of the two groups of spacers 3 correspond one by one, and the corresponding partition plates 31 overlap and abut against each other vertically. The sleeves 32 of the two groups of spacers 3 also overlap and abut against each other vertically. At the same time, the sleeve 32 at the top abuts into the communicating annular groove 23 of the upper locking seat 9, the partition plate 31 at the top abuts into the card slot 10 of the upper locking seat 9, the sleeve 32 at the bottom abuts into the communicating annular groove 23 of the lower locking seat 9, and the partition plate 31 at the bottom abuts into the card slot 10 of the lower locking seat 9. Moreover, in order to improve the stability between the two groups of spacers 3, a plug (not shown in the figure) can be fixed at the bottom end of the partition plate 31 in the spacer 3 at the upper end, and a slot for the plug to insert is provided at the top end of the partition plate 31 in the spacer 3 at the lower end, so that the partition plates 31 of the two groups of spacers 3 are connected by inserting the plug into the slot. In this embodiment, the spacer 3 is set to two groups.

[0037] Whether the spacer 3 is one group or two groups, when the two locking seats 9 are both clamped with the spacer 3, the spacer 3 is rotated axially relative to the mounting rod 8 around the mounting rod 8, driving the locking seat 9 to rotate relative to the mounting rod 8, so that the two locking seats 9 move towards each other and abut against the partition plate 31 and the sleeve 32, so as to achieve sealing between different groups of spacers 3 and between the spacer 3 and the locking seat 9.

[0038] Refer to Figure 2 and Figure 4, when the partition member 2 is inflated and the extraction pipe 4 enters the sealing cavity 5, the partition member 2 simultaneously clamps the extraction pipe 4 and the end portions of the corresponding isolation members 3, so as to enable sealing between the isolation member 3 and the partition member 2. Thus, the partition plate 31 divides the sealing cavity 5 into a first chamber 6 and a second chamber 7 that are isolated from each other and circumferentially distributed along the treatment well 1. The first chamber 6 faces the soil with the pollution plume, and the extraction pipe 4 enters the first chamber 6. A medicament is input into the first chamber 6 through the extraction pipe 4, and the medicament enters the soil to be repaired from the well wall of the treatment well 1 opposite to the first chamber 6, so as to limit the direction of medicament diffusion. It should be noted that by clamping the partition plate 31 into different card slots 10, the angle between the two partition plates 31 in the same group of isolation members 3 can be adjusted, thereby adjusting the size range of the first chamber 6 and the second chamber 7.

[0039] Refer to Figure 1 and Figure 3 , further, in order to improve the stability of the partition member 2 and the isolation member 3 below to the treatment well 1, a plurality of centering rods 17 are uniformly and circumferentially spaced along the outer circumference of the displacement resistance seat 16. Each centering rod 17 extends radially along the displacement resistance seat 16, and the distance between the end of the centering rod 17 away from the displacement resistance seat 16 and the axis of the mounting rod 8 is the same as the inner radius of the treatment well 1. During the process of lowering the partition member 2 into the treatment well 1, the end of each centering rod 17 away from the displacement resistance seat 16 abuts against the inner wall of the treatment well 1, so that the mounting rod 8 and the treatment well 1 are concentric when the partition member 2 is in the treatment well 1. And in order to improve the smoothness of the movement of the centering rod 17 in the treatment well 1, the end face of the centering rod 17 in contact with the treatment well 1 is a smooth surface.

[0040] Refer to Figure 5 and Figure 6 , further, in order to improve the sealing performance between the partition plate 31 and the inner wall of the treatment well 1, a sealing plate 11 moves radially along the treatment well 1 in the partition plate 31, and the partition plate 31 has a moving cavity for the sealing plate 11 to move. The vertical height of the sealing plate 11 is the same as the vertical height of the partition plate 31, and the sealing plate 11 has a first guiding portion 24. The partition plate 31 is provided with a first guiding groove (not shown in the figure) for the first guiding portion 24 to slide radially along the treatment well 1 on the inner wall of the moving cavity to guide the movement of the sealing plate 11, and the material on the side of the partition plate 31 away from the sleeve 32 is a rubber sealing strip.

[0041] Refer to Figure 3 and Figure 4, a pushing component is arranged between the partition plate 31 and the separator 2, and the pushing component is used to drive the partition plate 31 to move. When the separator 2 is in the air release state, the operator lowers the separator 2, the isolation member 3 and the extraction pipe 4 into the treatment well 1. At this time, the sealing plate 11 is received in the partition plate 31, and there is a gap between the partition plate 31 and the inner wall of the treatment well 1 to allow the partition plate 31 to smoothly move into the treatment well 1. When the separator 2 and the isolation member 3 reach the set position, the separator 2 is inflated. At this time, the pushing component pushes the sealing plate 11 on the side away from the mounting rod 8 to move out of the partition plate 31 in the direction away from the mounting rod 8 and abut against the inner wall of the treatment well 1 to achieve the sealing between the isolation member 3 and the treatment well 1.

[0042] Specifically, the pushing component includes a moving seat 12, a push rod 13 and an elastic member 15. The moving seat 12 is in the shape of a round cover. The moving seat 12 is coaxially sleeved on the mounting rod 8 and is located between the separator 2 and the locking seat 9. The separator 2 has a stepped groove for making way for the moving seat 12, and the moving seat 12 has a receiving cavity 25 facing the locking seat 9. The cross-sectional dimension of the receiving cavity 25 is the same as the cross-sectional dimension of the locking seat 9 and is used to sleeve the locking seat 9.

[0043] Refer to Figure 4 and Figure 6 , the push rod 13 moves axially along the treatment well 1 in the partition plate 31. The push rod 13 has a second guiding portion 26. A second guiding groove (not shown in the figure) for the second guiding portion 26 to slide axially along the treatment well 1 is formed in the inner wall of the moving cavity of the partition plate 31. The second guiding groove penetrates through the upper and lower ends of the partition plate 31 to facilitate the relative movement of the push rod 13. Both the upper and lower sides of the sealing plate 11 have guide inclined surfaces 14. The guide inclined surfaces 14 are mirror-symmetrical along the horizontal center line of the sealing plate 11, and the vertical straight-line distance between the two guide inclined surfaces 14 gradually increases in the direction away from the mounting rod 8.

[0044] The push rod 13 is assembled between the partition plate 31 and the adjacent moving seat 12. One end of the push rod 13 abuts against the outer edge of the moving seat 12, and the opposite end of the push rod 13 extends into the moving cavity and abuts against one guide inclined surface 14 of the partition plate 31. That is, when one set of isolation members 3 is used in the device, push rods 13 are assembled at both the upper and lower ends of the partition plate 31. When two sets of isolation members 3 are used in the device, the push rod 13 is assembled at the two ends of the partition plate 31 that are far away from each other among the two sets of isolation members 3.

[0045] The elastic member 15 is a spring. The elastic member 15 is located in the moving cavity, and both ends of the elastic member 15 are respectively connected to the inner wall of the partition plate 31 and the sealing plate 11. The elastic force of the elastic member 15 gives the sealing plate 11 a tendency to move in the direction close to the mounting rod 8 and be received in the partition plate 31.

[0046] Refer to 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.

[0047] Reference Figure 3 and Figure 4 When the partition 2 is inflated, the expanded partition 2 pushes the moving seat 12 toward the locking seat 9, so that the inner end wall of the accommodating cavity 25 of the moving seat 12 is pressed against the locking seat 9, and the outer edge of the moving seat 12 is pressed against the end surface of the partition 31. During the process, the moving 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 through the guide inclined surface 14 to move in the direction of extending out of the partition 31, 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.

[0048] 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.

[0049] When the partition 2 is in the deflated state, the movable seat 12 is supported by the push rod 13 to move 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 through the outer skin of the partition 2, so that the inner cavity of the partition 2 opposite to the inner and outer sides of the partition ring 18 is isolated by the partition ring 18. The gas filling tube 19 is connected to the cavity opposite to the inner periphery of the partition ring 18. When the gas filling 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 through the push rod 13 to press against the inner wall of the treatment well 1. 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 isolation ring 18 , and the gas can be assisted in pushing the moving seat 12 .

[0050] The present application also discloses a multi-stage environmental protection remediation method for contaminated groundwater, comprising the following steps: S1, sampling and testing of 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. Assemble the separator 2, the spacer 3 and the drainage pipe 4 to the mounting rod 8, and then place them into the treatment well 1. Align the first chamber 6 with the contaminated plume distribution area. Then, inflate the separator 2 so that the separator 2 and the spacer 3 together isolate the first chamber 6 from the rest of the treatment well 1. Next, inject the remediation agent into the first chamber 6 through the drainage pipe 4, so that the remediation agent permeates from the well wall area corresponding to the first chamber 6 to the contaminated plume distribution area in a directional manner. S4. After monitoring that the soil pollutants meet the standards, recharge the purified groundwater back into the soil.

[0051] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A multi-stage environmental protection remediation treatment device for contaminated groundwater, characterized in that: It includes a treatment well (1), a partition member (2), a spacer member (3), and a gas drainage pipe (4); there are two of the partition members (2) which are arranged in sequence along the height direction of the treatment well (1), and the two partition members (2) and the well wall of the treatment well (1) jointly enclose a sealed cavity (5); the spacer member (3) is detachably arranged between the two partition members (2) for isolating the sealed cavity (5) into a first chamber (6) and a second chamber (7), and by adjusting the position of the spacer member (3) relative to the partition member (2), the sizes of the first chamber (6) and the second chamber (7) can be adjusted; the gas drainage pipe (4) passes through the upper partition member (2) among the two partition members (2) and enters the first chamber (6).

2. The multi-stage environmental protection restoration treatment device for contaminated groundwater according to claim 1, characterized in that: The partition member (2) expands by inflation and presses against the treatment well (1) and the spacer member (3).

3. The multi-stage environmental protection restoration treatment device for contaminated groundwater according to claim 2, characterized in that: An installation rod (8) is coaxially passed through the two partition members (2), and the spacer member (3) includes two partition plates (31). Sleeves (32) sleeved on the installation rod (8) are provided on both of the two partition plates (31). The sleeves (32) of the two partition plates (31) abut against each other along the axial direction of the treatment well (1), and the two partition plates (31) are circumferentially distributed along the treatment well (1).

4. A multi-stage environmental protection restoration treatment device for contaminated groundwater according to claim 3, characterized in that: Two locking seats (9) are sleeved on the installation rod (8) along the axial direction of the treatment well (1). A plurality of card slots (10) are circumferentially spaced on the locking seats (9) along the treatment well (1). The card slots (10) of the two locking seats (9) are opposite to each other, and the two partition plates (31) are respectively inserted into different card slots (10).

5. A multi-stage environmental protection remediation treatment device for contaminated groundwater according to claim 4, characterized in that: Both of the two locking seats (9) are threadedly sleeved on the installation rod (8) and jointly clamp all the sleeves (32) on the installation rod (8), and the threads of the two locking seats (9) are reverse.

6. A multi-stage environmental protection remediation treatment device for contaminated groundwater according to claim 4, characterized in that: A sealing plate (11) moves radially in the partition plate (31). The sealing plate (11) is used to move out of the partition plate (31) to press against the inner wall of the treatment well (1). A pushing assembly for driving the sealing plate (11) to move is provided between the partition plate (31) and the partition member (2); when the partition member (2) is in a deflated state, the sealing plate (11) is received in the partition plate (31), and when the partition member (2) is in an inflated state, the partition member (2) drives the pushing assembly to move, so that the pushing assembly pushes the sealing plate (11) out of the partition plate (31).

7. A multi-stage environmental protection restoration treatment device for polluted groundwater according to claim 6, characterized in that: The pushing assembly includes a moving seat (12) which abuts against one end of the partition member (2) facing the sealed cavity (5) and simultaneously sleeves the installation rod (8); a push rod (13) which axially moves in the partition plate (31) along the treatment well (1). The sealing plate (11) has a guide inclined surface (14) for the end of the push rod (13) to abut against, and at the same time 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 plate (31) and used to impart an elastic force to the sealing plate (11) to move in a direction to be accommodated in the partition plate (31); When the partition (2) is in a deflated state, the sealing plate (11) is pulled by the elastic member (15) and stored 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).

8. A multi-stage environmental protection restoration treatment device for polluted groundwater according to claim 7, characterized in that: A displacement blocking seat (16) is threadedly sleeved on the mounting rod (8), and the displacement blocking seat (16) has a plurality of centering rods (17) along its own circumference that abut against the inner wall of the treatment well (1); a partition ring (18) is fixed to the inner cavity wall of the partition (2) at one end away from the movable seat (12); when the partition (2) is in a deflated state, the partition ring (18) can be clamped between the displacement blocking seat (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).

9. A multi-stage environmental protection restoration treatment method for polluted groundwater, applicable to the multi-stage environmental protection restoration treatment device for polluted groundwater described in any one of the above claims 1-8, characterized in that, The following steps are involved: S1, sampling and testing of 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, placing the partition (2), the isolation member (3) and the extraction pipe (4) into the treatment well (1) so that the first chamber (6) is opposite to the pollution plume distribution area, and then adding a repair agent 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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