Underground water remediation system

Abstract

The invention discloses an underground water remediation system, and relates to the technical field of remediation and treatment of polluted site soil underground water, and the underground water remediation system comprises a plurality of reaction walls, a remediation agent, a precipitation well and a submersible sewage pump; the reaction walls extend in the second direction, the multiple reaction walls are arranged at intervals in the first direction, and the reaction walls are arranged in a hollow mode; the reaction wall is filled with the remediation agent, and the reaction wall is used for allowing underground water to penetrate and flow in the first direction so as to make contact with the remediation agent; at least one dewatering well is arranged between two adjacent reactive walls of the dewatering wells; the submersible sewage pump is mounted in the dewatering well and is used for pumping underground water; according to the technical scheme, the submersible sewage pump is arranged in the downstream direction of the reaction wall, underground water is pumped through the submersible sewage pump, a local water head is increased, the flow speed of the underground water is increased, the underground water rapidly permeates through the reaction wall, repairing is completed, and the technical effects that the flow speed of the underground water is increased, and the repairing speed of the polluted underground water is increased are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of remediation of contaminated site soil and groundwater, and particularly relates to a groundwater remediation system. BACKGROUND

[0002] The permeable reactive wall technology is a relatively mature in-situ remediation technology, and the principle thereof is that a wall body filled with active materials is filled in the direction of groundwater flow, the natural groundwater gradient is utilized to make the contaminated groundwater preferentially pass through the permeable reactive wall with a permeability coefficient greater than that of the surrounding rock-soil body and contact the active materials filled in the permeable reactive wall to react, so as to remove the pollutants.

[0003] However, the contact efficiency of the fillers in the reactive wall with the contaminated water flow is low in the area with a low water head in the groundwater pollution plume, and thus the contaminated groundwater is slowly remediated. SUMMARY

[0004] The main purpose of the present application is to provide a groundwater remediation system, which aims to improve the groundwater flow rate and thus improve the remediation speed of the contaminated groundwater.

[0005] To achieve the above purpose, the groundwater remediation system provided by the present application comprises a plurality of reactive walls, a remediation agent, a dewatering well and a sewage submersible pump.

[0006] In an embodiment, a plurality of dewatering wells are arranged between two adjacent reactive walls, and the plurality of dewatering wells are arranged at intervals in the second direction.

[0007] In an embodiment, the groundwater remediation system further comprises a liquid level sensor arranged in the dewatering well for detecting the depth of the groundwater.

[0008] In an embodiment, the groundwater remediation system further comprises a solar panel arranged outside the dewatering well for receiving solar energy, and the sewage submersible pump has a built-in power supply, and the solar panel is electrically connected to the built-in power supply.

[0009] In an embodiment, the height of the dewatering well in the third direction is higher than that of the reactive wall.

[0010] In an embodiment, the precipitation well comprises an inner well tube and an outer well tube, the outer well tube is sleeved on the inner well tube, a first filling cavity is formed between the inner well tube and the outer well tube, the first filling cavity is filled with the remediation agent, the inner well tube and the outer well tube are provided with a plurality of first through holes, the diameter of the first through holes is smaller than the diameter of the remediation agent.

[0011] In an embodiment, the precipitation well comprises an inner well tube frame, an outer well tube frame and two first metal nets, the first metal nets are detachably installed on the inner well tube frame to form the inner well tube, the first metal nets are detachably installed on the outer well tube frame to form the outer well tube, the mesh holes of the first metal nets correspond to the first through holes; The well body comprises an inner cylinder frame and an outer cylinder frame sleeved on the outer side of the inner cylinder frame, two first metal nets are detachably installed on the inner cylinder frame and the outer cylinder frame respectively, a first filling cavity is formed between the two first metal nets, the first filling cavity is filled with the remediation agent, the mesh hole diameter of the first metal nets is smaller than the diameter of the remediation agent.

[0012] In an embodiment, the reaction wall comprises a filling shell, the filling shell has a second filling cavity inside, the filling shell is provided with a plurality of second through holes penetrating in the first direction on both sides of the first direction, the remediation agent is filled in the second filling cavity, the diameter of the remediation agent is greater than the diameter of the second through holes.

[0013] In an embodiment, the filling shell comprises a metal mounting frame and two second metal nets, the two second metal nets are detachably installed on both sides of the metal mounting frame in the first direction to form the second filling cavity, the mesh holes of the second metal nets correspond to the second through holes.

[0014] In an embodiment, the metal mounting frame and the second metal nets are connected by steel wires.

[0015] The technical scheme of the present application sets a submersible sewage pump in the downstream direction of the reaction wall, extracts underground water through the submersible sewage pump, increases the local water head, increases the flow rate of underground water, makes the underground water quickly penetrate through the reaction wall, completes the remediation, and achieves the technical effect of improving the flow rate of underground water and improving the remediation speed of the contaminated underground water. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0017] Figure 1 The structural schematic diagram of an embodiment of the groundwater remediation system provided by the present application is shown in the figure. Figure 2 The structural schematic diagram of the reaction wall of the groundwater remediation system is shown in the figure. Figure 1 The structural schematic diagram of the reaction wall of the groundwater remediation system is shown in the figure. Figure 3 The structural schematic diagram of the precipitation well of the groundwater remediation system is shown in the figure. Figure 1 The structural schematic diagram of the precipitation well of the groundwater remediation system is shown in the figure.

[0018] Explanation of the reference signs: 100, groundwater remediation system; 1, reaction wall; 11, packing shell; 12, second packing cavity; 2, remediation agent; 3, precipitation well; 31, inner well shaft; 32, outer well shaft; 33, first packing cavity; 4, sewage submersible pump; 5, liquid level sensor; 6, solar panel.

[0019] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0022] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0023] And the pollutants in the groundwater pollution plume use the permeable reactive wall technology in the area with low water head. The groundwater flow rate is slow in the area with low water head, which leads to low contact efficiency of the filler in the reactive wall and the polluted water flow, thus leading to slow remediation of the polluted groundwater.

[0024] The present application provides a groundwater remediation system.

[0025] Please refer to Figure 1 In an embodiment of the present application, the groundwater remediation system 100 comprises a plurality of reactive walls 1, a remediation agent 2, a dewatering well 3 and a sewage pump 4. The reactive walls 1 extend along a second direction, and a plurality of reactive walls 1 are arranged at intervals along a first direction. The reactive walls 1 are hollow. The remediation agent 2 is filled in the interior of the reactive walls 1. The reactive walls 1 are used for the groundwater to penetrate and flow through along the first direction to contact the remediation agent 2. At least one dewatering well 3 is arranged between two adjacent reactive walls 1. The sewage pump 4 is installed in the dewatering well 3 and used for pumping groundwater.

[0026] The technical scheme of the present application is characterized in that the first direction is the flowing direction of the underground water, the second direction is perpendicular to the first direction, the reaction wall 1 is filled with the remediation agent 2, the depth of the reaction wall 1 is 2 m into the impermeable layer of the floor of the contaminated underground water, and the top of the reaction wall 1 is flush with the original ground. The underground water continues to flow on the flowing path through the reaction wall 1 to ensure that the underground water contacts the remediation agent 2 and realizes the remediation of the underground water. In order to ensure the remediation effect of the underground water, a plurality of reaction walls 1 are arranged at intervals along the first direction. The precipitation well 3 is 2 m into the impermeable layer of the floor of the contaminated underground water, so that the precipitation well 3 can communicate with the underground water, and the submersible sewage pump 4 is installed in the precipitation well 3 and used for pumping the underground water. The precipitation well 3 is arranged between the adjacent two reaction walls 1. For the reaction wall 1 located upstream of the precipitation well 3, the pumping of the underground water from the precipitation well 3 can lower the water level of the underground water downstream of the reaction wall 1, increase the water level difference on both sides of the reaction wall 1 along the first direction, increase the permeation efficiency of the underground water, accelerate the flowing speed along the first direction, and improve the remediation speed of the contaminated underground water. For the last reaction wall 1 located downstream, the precipitation well 3 and the submersible sewage pump 4 can be arranged downstream of the last reaction wall 1.

[0027] The distance between the two reaction walls 1 can be far, the storage of the underground water between the two walls can be large, and the pumping speed of the single submersible sewage pump 4 is too slow to quickly lower the water level. A plurality of precipitation wells 3 are arranged between the adjacent two reaction walls 1, the plurality of precipitation wells 3 are arranged at intervals along the second direction, and the submersible sewage pump 4 is also provided with a plurality of precipitation wells 3.

[0028] In order to automatically pump the underground water when the underground water level is high, the underground water remediation system 100 further comprises a liquid level sensor 5 arranged in the precipitation well 3 and used for detecting the depth of the underground water. The underground water remediation system 100 further comprises a controller which receives the water level information through the liquid level sensor 5, controls the submersible sewage pump 4 to start when the water level is too high, and controls the submersible sewage pump 4 to stop when the water level is low.

[0029] Since the position for remediation of the underground water is generally in the wild and it is difficult to connect to the indoor power supply, the underground water remediation system 100 further comprises a solar panel 6 arranged outside the precipitation well 3 and used for receiving solar energy. The submersible sewage pump 4 has an internal power supply, and the solar panel 6 is electrically connected with the internal power supply. The solar panel 6 converts the solar energy into electric energy and stores the electric energy in the internal power supply, so that the submersible sewage pump 4 can work normally. The solar panel 6 can also supply power to the controller.

[0030] For the precipitation well 3, the height of the precipitation well 3 in the third direction is higher than that of the reaction wall 1. Since the depth of the reaction wall 1 is 2 m into the impermeable layer of the floor of the contaminated underground water and the top of the reaction wall 1 is flush with the original ground, the top of the precipitation well 3 protrudes from the ground, so that the well platform is convenient to build.

[0031] In order to improve the remediation effect on groundwater, the remediation agent 2 is arranged at different positions. In one embodiment, please refer to Figure 1 and Figure 3 The remediation agent 2 is arranged in the cylinder of the dewatering well 3. When the groundwater passes through the dewatering well 3, the remediation of the groundwater by the remediation agent 2 is completed. A plurality of dewatering wells 3 are arranged along the second direction to remediate the groundwater at different positions along the second direction of the flow channel. In order to fill the remediation agent 2 in the interior of the dewatering well 3, the dewatering well 3 comprises an inner well cylinder 31 and an outer well cylinder 32, the outer well cylinder 32 is sleeved on the inner well cylinder 31, a first filling cavity 33 is formed between the inner well cylinder 31 and the outer well cylinder 32, the first filling cavity 33 is filled with the remediation agent 2, and the inner well cylinder 31 and the outer well cylinder 32 are provided with a plurality of first through holes, the diameter of the first through holes is smaller than the diameter of the remediation agent 2. The groundwater passes through the first through holes of the outer well cylinder 32, enters the first filling cavity 33 to contact with the remediation agent 2, and then passes through the first through holes of the inner well cylinder 31 to enter the interior of the dewatering well 3. The groundwater in the interior of the dewatering well 3 can also flow to the outside of the dewatering well 3 through the first through holes.

[0032] Specifically, the dewatering well 3 comprises an inner well cylinder 31 frame, an outer well cylinder 32 frame, and two first metal nets, the first metal net is detachably mounted on the inner well cylinder 31 frame to form the inner well cylinder 31, the first metal net is detachably mounted on the outer well cylinder 32 frame to form the outer well cylinder 32, and the mesh holes of the first metal net correspond to the first through holes. The inner well cylinder 31 frame, the outer well cylinder 32 frame, and the two first metal nets are metal structures, so that the overall mechanism is more stable and the hole collapse is prevented.

[0033] The remediation effect of the remediation agent 2 will become poor after a period of use, and the remediation agent 2 needs to be replaced. The existing technology is to replace the remediation agent 2 together with the components for installing the remediation agent 2. Therefore, the replacement of the remediation agent 2 requires a large replacement cost. The well body comprises an inner cylinder frame and an outer cylinder frame sleeved on the outer side of the inner cylinder frame, two first metal nets are detachably mounted on the inner cylinder frame and the outer cylinder frame, a first filling cavity 33 is formed between the two first metal nets, the first filling cavity 33 is filled with the remediation agent 2, and the mesh holes of the first metal net are smaller than the diameter of the remediation agent 2. After the dewatering well 3 is taken out from the ground, the first metal net is detached, the remediation agent 2 is replaced, the first metal net is mounted again after the replacement of the remediation agent 2, and the dewatering well 3 is installed at the position where it was installed before. The inner well cylinder 31 frame, the outer well cylinder 32 frame, and the two first metal nets are metal structures, so that the dewatering well 3 is stable in structure and has a long service life.

[0034] For the reaction wall 1, please refer to Figure 2In order to fill the reaction wall 1 with the repair agent 2 and enable the groundwater to permeate the reaction wall 1, the reaction wall 1 comprises a filling shell 11, the filling shell 11 has a second filling cavity 12 inside, and the filling shell 11 is provided with a plurality of second through holes penetrating in the first direction on both sides of the first direction, the repair agent 2 is filled in the second filling cavity 12, and the diameter of the repair agent 2 is greater than the diameter of the second through hole.

[0035] Specifically, the filling shell 11 comprises a metal mounting frame and two second metal nets, and the two second metal nets are respectively detachably mounted on both sides of the first direction of the metal mounting frame to form the second filling cavity 12, and the mesh of the second metal net corresponds to the second through hole. The groundwater enters the second filling cavity 12 through the mesh of one side of the second metal net and contacts the repair agent 2, and then flows out of the reaction wall 1 through the mesh of the other side of the second metal net. Wherein, the detachable mounting mode is that the metal mounting frame and the second metal net are connected by steel wires. The steel wire binding and fixed connection is a commonly used connection mode on the construction site, which is not only firm after installation, but also simple to operate. The filling shell 11 is a metal structure, so the filling shell 11 can be reused. After the reaction wall 1 is taken out, the binding steel wire is directly cut off by an angle grinder, the filling shell 11 is reserved, the repair agent 2 is replaced, and then the steel wire is bound again after replacement, and then the filling shell 11 is reinstalled in the ground.

[0036] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the technical concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A groundwater remediation system, characterized in that, include: Multiple reaction walls, which extend along a second direction and are spaced apart along a first direction, and are hollow in the reaction walls; A remediation agent is filled inside the reactive wall, which is used to allow groundwater to penetrate and flow through in a first direction to contact the remediation agent. At least one of the aforementioned rainwater wells shall be provided between two adjacent reaction walls; A submersible sewage pump is installed inside the dewatering well and is used to extract groundwater.

2. The groundwater remediation system as described in claim 1, characterized in that, Multiple dewatering wells are provided between two adjacent reaction walls, and the multiple dewatering wells are spaced apart along the second direction. Multiple submersible pumps are also provided and placed in the multiple dewatering wells.

3. The groundwater remediation system as described in claim 1, characterized in that, The groundwater remediation system also includes a level sensor, which is installed inside the dewatering well to detect the depth of the groundwater.

4. The groundwater remediation system as described in claim 1, characterized in that, The groundwater remediation system also includes a solar panel, which is installed outside the dewatering well to receive solar energy. The submersible pump has a built-in power supply, and the solar panel is electrically connected to the built-in power supply.

5. The groundwater remediation system as described in claim 1, characterized in that, The precipitation well is higher than the reaction wall in a third direction.

6. The groundwater remediation system as described in claim 1, characterized in that, The dewatering well includes an inner well casing and an outer well casing. The outer well casing is fitted inside the inner well casing. A first filling cavity is formed between the inner well casing and the outer well casing. The first filling cavity is filled with the repair agent. The inner well casing and the outer well casing are provided with a plurality of first through holes. The diameter of the first through holes is smaller than the diameter of the repair agent.

7. The groundwater remediation system as described in claim 1, characterized in that, The dewatering well includes an inner well frame, an outer well frame, and two first metal meshes. The first metal meshes are detachably installed on the inner well frame to form the inner well, and the first metal meshes are detachably installed on the outer well frame to form the outer well. The mesh openings of the first metal meshes correspond to the first through holes. The well body includes an inner cylinder frame and an outer cylinder frame sleeved on the outside of the inner cylinder frame. Two first metal meshes are detachably installed on the inner cylinder frame and the outer cylinder frame, respectively. A first filling cavity is formed between the two first metal meshes. The first filling cavity is filled with the repair agent. The mesh size of the first metal mesh is smaller than the diameter of the repair agent.

8. The groundwater remediation system as described in claim 1, characterized in that, The reactive wall includes a filling shell, the filling shell having a second filling cavity inside, and multiple second through holes extending along the first direction are provided on both sides of the filling shell in a first direction. The repair agent is filled into the second filling cavity, and the diameter of the repair agent is larger than the diameter of the second through holes.

9. The groundwater remediation system as described in claim 8, characterized in that, The filling shell includes a metal mounting frame and two second metal meshes. The two second metal meshes are detachably installed on both sides of the metal mounting frame in a first direction to enclose and form the second filling cavity. The mesh openings of the second metal meshes correspond to the second through holes.

10. The groundwater remediation system as described in claim 9, characterized in that, The metal mounting frame and the second metal mesh are connected by steel wire.

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