A device and method for remediating hexavalent chromium contaminated groundwater

Abstract

The application relates to the technical field of underground contaminated water remediation, in particular to a hexavalent chromium contaminated underground water remediation device and a remediation method, which comprises a medicine injection pipeline, a sliding rod is arranged on the side of the medicine injection pipeline in a vertical direction, a medicine outlet hole is arranged on the side of the sliding rod, the sliding rod is of a hollow structure and the inside of the sliding rod and the inside of the medicine injection pipeline are communicated, a control assembly and a medicine pressing assembly are arranged on the medicine injection pipeline, the control assembly is connected with the sliding rod and used for adjusting the position of the sliding rod, and the medicine pressing assembly is used for extruding the solution in the medicine injection pipeline through the medicine outlet hole. The application has the effect that the remediation solution can be injected into different depths.

Description

Technical Field

[0001] This application relates to the technical field of groundwater remediation, and in particular to a device and method for remediating hexavalent chromium-contaminated groundwater. Background Technology

[0002] Many chromium-contaminated sites require remediation.

[0003] Chemical reduction stabilization technology is one of the techniques for remediating chromium pollution. It utilizes an injection device to deliver a remediation solution, which reacts with the pollutants to reduce and detoxify hexavalent chromium, fixing it in the soil. This method is primarily suitable for areas with simple geotechnical structures and deep pollution levels. However, existing injection devices generally only allow the injection of remediation solution or solution at a single depth, affecting the remediation effect. Summary of the Invention

[0004] To facilitate the injection of remediation solutions to different depths, this application provides a device and method for remediating hexavalent chromium-contaminated groundwater.

[0005] In the first aspect, this application provides a device for remediating groundwater contaminated with hexavalent chromium.

[0006] The following technical solution is adopted:

[0007] A groundwater remediation device for hexavalent chromium contaminated water includes an injection pipeline. A sliding rod is slidably mounted on the side of the injection pipeline in a vertical direction. A dispensing hole is opened on the side of the sliding rod. The sliding rod has a hollow structure and its interior is connected to the interior of the injection pipeline. A control component and a dispensing component are provided on the injection pipeline. The control component is connected to the sliding rod for adjusting the position of the sliding rod. The dispensing component is used to squeeze the solution in the injection pipeline through the dispensing hole.

[0008] By adopting the above technical solution, the injection component pressurizes the solution into the contaminated area, while the control component moves the sliding rod, which in turn moves the injection hole, adjusting the injection position of the solution and thus regulating the injection depth.

[0009] Optionally, a groove is provided on the side of the injection pipe, and the sliding rod is slidably disposed in the groove. The outer side of the sliding rod and the side of the injection pipe are in the same arc surface, and the sliding rod is locked in the groove.

[0010] By adopting the above technical solution, the outer side of the sliding rod and the side of the injection pipe are set to be in the same arc surface, so that the sliding rod is inserted into the ground along with the injection pipe, and the resistance encountered when adjusting the sliding rod is reduced, so that the position of the sliding rod can be adjusted.

[0011] Optionally, the injection pipeline is provided with an installation plate, and an installation rod is provided on the side of the installation plate opposite to the injection pipeline. The control component includes a first driving member, a control sleeve, and a control ring. The control sleeve is rotatably disposed outside the installation rod. The outer side of the control sleeve is provided with threads along the length direction of the installation rod. The control ring is sleeved outside the control sleeve and threadedly connected to the control sleeve. The control ring is connected to a sliding rod. The first driving member is connected to the installation rod. The output end of the first driving member is provided with a first gear. The outer circumferential surface of the control sleeve is provided with a first tooth groove that meshes with the first gear.

[0012] By adopting the above technical solution, the first driving component drives the control sleeve to rotate through the first gear and the first tooth groove. The rotation of the control sleeve drives the sliding rod to move through the control ring, thereby adjusting the position of the sliding rod.

[0013] Optionally, the inside of the side wall of the injection pipe is provided with an intermediate groove, the inside of the injection pipe is provided with an inlet communicating with the intermediate groove, the side wall of the chute is provided with a first connecting port communicating with the intermediate groove, the side of the sliding rod is provided with a second connecting port communicating with its interior, and the interior of the sliding rod is connected to the intermediate groove through the first connecting port and the second connecting port.

[0014] By adopting the above technical solution, the repair solution enters the intermediate tank through the inlet, then enters the sliding rod through the first and second connecting ports, and finally exits through the outlet into the contaminated area to repair the contaminated area.

[0015] Optionally, the second connecting port is elongated along the sliding direction of the sliding rod.

[0016] By adopting the above technical solution, the second connecting port is set to be elongated so that when the sliding rod moves, the second connecting port can be connected to the first connecting port, that is, the solution can still be stably output when the sliding rod moves, and the designated position can be repaired.

[0017] Optionally, the drug-pressing assembly includes a drug-pressing disc, a push rod, and a second driving component. The drug-pressing disc is slidably disposed within the drug injection pipeline, and the side of the drug-pressing disc slidably abuts against the inner wall of the drug injection pipeline. The push rod is connected to the drug-pressing disc, and a through groove is provided on the mounting rod. The push rod extends to the outside of the mounting rod through the through groove. A drug-pressing gear is provided at the output end of the second driving component, and a drug-pressing tooth groove that meshes with the drug-pressing gear is provided on the side of the push rod along its length direction.

[0018] By adopting the above technical solution, the second driving component drives the push rod to move through the pressing gear and pressing tooth groove. The movement of the push rod drives the pressing disc to move, and the movement of the pressing disc squeezes the solution into the sliding rod.

[0019] Optionally, a stabilizing plate is provided at the end of the injection pipeline, and a stabilizing rod is provided on the side of the stabilizing plate near the ground, the stabilizing rod being inserted into the ground.

[0020] By adopting the above technical solution, a stabilizing rod and a stabilizing plate are installed to support the injection pipeline after it is inserted into the ground, thereby improving the stability of the injection pipeline. At the same time, the sliding rod reduces the phenomenon of pipeline deviation.

[0021] Optionally, multiple sliding rods are provided around the injection pipe, and multiple drug outlet holes are provided at intervals along the length of the sliding rod.

[0022] By adopting the above technical solution and setting multiple sliding rods and multiple dispensing holes, the solution can be evenly distributed into the polluted area, thereby improving the treatment effect of water pollution.

[0023] Optionally, the drug inlet is located near the bottom of the drug injection pipe.

[0024] By adopting the above technical solution, the inlet is set close to the bottom of the injection pipe, so as to force out the solution in the injection pipe and improve the utilization rate of the solution.

[0025] Secondly, this application provides a method for remediating hexavalent chromium-contaminated groundwater, using the aforementioned hexavalent chromium groundwater remediation device.

[0026] The following technical solution is adopted:

[0027] A method for remediating hexavalent chromium-contaminated groundwater includes the following steps:

[0028] Add repair solution into the injection pipeline;

[0029] Insert the injection tubing into the ground;

[0030] The second driving component drives the push rod to move, and the push rod moves the pressing plate to move. The pressing plate pushes the repair solution into the sliding rod through the inlet, the intermediate groove, the first connecting port and the second connecting port in sequence, and finally into the contaminated area through the outlet.

[0031] After the injection of the drug in this area is completed, the first driving component drives the sliding rod to move, and the sliding rod drives the drug outlet to different positions to inject the drug at different positions;

[0032] When the repair solution in the injection pipeline is insufficient, the second drive unit drives the pressure plate to move in the opposite direction, and at the same time, the repair solution is introduced into the injection pipeline through the dosing hole. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0034] Figure 2 This is an internal structural view of the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0035] Figure 3 This is a structural view of the injection pipeline in the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0036] Figure 4 This is a structural view of the intermediate tank inside the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0037] Figure 5 This is a structural view of the control component in the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0038] Figure 6 This is a structural view of the pressure chemical assembly in the hexavalent chromium contaminated groundwater remediation device according to an embodiment of this application.

[0039] Reference numerals: 1. Injection pipe; 2. Sliding rod; 21. Injection hole; 22. Second connecting port; 3. Control component; 31. First drive component; 311. First gear; 32. Control sleeve; 321. First tooth groove; 33. Control ring; 4. Pressing component; 41. Pressing disc; 42. Push rod; 421. Pressing tooth groove; 43. Second drive component; 431. Pressing gear; 5. Slide groove; 6. Mounting plate; 61. Mounting rod; 611. Through groove; 7. Intermediate groove; 71. Inlet; 72. First connecting port; 8. Stabilizing plate; 81. Stabilizing rod; 9. Injection hole. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0041] This application discloses a device for remediating groundwater contaminated with hexavalent chromium.

[0042] Reference Figure 1 and Figure 2The hexavalent chromium contaminated groundwater remediation device includes an injection pipe 1, which is inserted into the contaminated ground to be remediated. A sliding rod 2 is vertically slidable on the side of the injection pipe 1, and a dispensing hole 21 is provided on the side of the sliding rod 2. The sliding rod 2 has a hollow structure, and its interior is connected to the interior of the injection pipe 1. A control component 3 is installed on the injection pipe 1, which is connected to the sliding rod 2 for adjusting the position of the sliding rod 2. During the remediation of the contaminated area, a remediation solution is added into the injection pipe 1. Simultaneously, a pressure component 4 is installed inside the injection pipe 1 to expel the remediation solution from the injection pipe 1 through the dispensing hole 21 and inject it into the contaminated area. The position of the dispensing hole 21 is adjusted by the control component 3 to inject the remediation solution to different depths below the ground surface.

[0043] Reference Figure 3 and Figure 4 A groove 5 is provided on the side of the injection pipe 1, and the sliding rod 2 is slidably disposed within the groove 5. Simultaneously, the outer side of the sliding rod 2 and the side of the injection pipe 1 are positioned within the same arc surface to reduce interference between the sliding rod 2 and the injection pipe 1 when inserted into the ground. The opening of the groove 5 gradually narrows, meaning the groove 5 is trapezoidal along a direction perpendicular to the axis of the injection pipe 1, allowing the sliding rod 2 to embed itself within the groove 5. This reduces the possibility of the sliding rod 2 disengaging from the groove 5 and improves the stability of the fit between the sliding rod 2 and the groove 5.

[0044] Reference Figure 3 and Figure 5 An installation plate 6 is provided at the end of the injection pipe 1 near the ground. An installation rod 61 is provided coaxially with the injection pipe 1 at the end of the installation plate 6 away from the injection pipe 1. The control component 3 includes a first drive member 31, a control sleeve 32, and a control ring 33. The control sleeve 32 is provided along the length direction of the installation rod 61 and is rotatably disposed outside the installation rod 61. A thread is provided on the outside of the control sleeve 32 along its length direction. The control ring 33 is sleeved on the outside of the control sleeve 32 and is threadedly connected to the control sleeve 32. The control ring 33 is connected to the end of the sliding rod 2. The first drive member 31 is disposed on the installation rod 61. The first drive member 31 can be configured as a motor. A first gear 311 is provided at the output end of the first drive member 31. A first tooth groove 321 that meshes with the first gear 311 is provided circumferentially on the outside of the control sleeve 32. The first driving component 31 drives the first gear 311 to rotate, and the first gear 311 drives the control sleeve 32 to rotate through the first tooth groove 321, which in turn drives the control ring 33 to move, thereby adjusting the position of the sliding rod 2.

[0045] Reference Figure 4 and Figure 5An intermediate groove 7 is formed inside the side wall of the injection pipe 1, and an inlet 71 communicating with the intermediate groove 7 is formed inside the injection pipe 1. A first connecting port 72 communicating with the intermediate groove 7 is formed on the side wall of the sliding groove 5, and a second connecting port 22 communicating with the interior of the sliding rod 2 is formed on the side. The interior of the sliding rod 2 is connected to the intermediate groove 7 through the first connecting port 72 and the second connecting port 22. The repair solution in the injection pipe 1 enters the intermediate groove 7 through the inlet 71, then enters the interior of the sliding rod 2 through the first connecting port 72 and the second connecting port 22 in sequence, and finally exits through the outlet 21.

[0046] Reference Figure 4 and Figure 5 The second connecting port 22 is elongated along the sliding direction of the sliding rod 2, ensuring that the second connecting port 22 and the first connecting port 72 remain connected as the sliding rod 2 moves. This means that the repair solution can be discharged through the dispensing hole 21 when the sliding rod 2 slides to different positions.

[0047] Reference Figure 2 and Figure 6 The drug-pressing assembly 4 includes a drug-pressing disc 41, a push rod 42, and a second driving component 43. The drug-pressing disc 41 and the drug-injection pipe 1 are coaxially arranged, and the drug-pressing disc 41 is slidably disposed within the drug-injection pipe 1. The side of the drug-pressing disc 41 slidably abuts against the inner wall of the drug-injection pipe 1. The push rod 42 is disposed at the end of the drug-pressing disc 41 near the ground. A through groove 611 is provided on the mounting rod 61, through which the push rod 42 extends to the outside of the mounting rod 61. The second driving component 43 can be configured as a motor. A drug-pressing gear 431 is provided at the output end of the second driving component 43. A drug-pressing tooth groove 421 is provided on the side of the push rod 42 along its length direction, and the drug-pressing tooth groove 421 meshes with the drug-pressing gear 431. The second driving component 43 drives the push rod 42 to move through the drug-pressing gear 431 and the drug-pressing tooth groove 421. The movement of the push rod 42 drives the drug-pressing disc 41, and the movement of the drug-pressing disc 41 squeezes out the repair solution in the drug-injection pipe 1. Additionally, the inlet 71 is located near the bottom of the injection pipe 1 so that when the repair solution is squeezed, the repair solution in the injection pipe 1 can be completely squeezed out of the injection pipe 1.

[0048] Reference Figure 3 and Figure 4 Multiple sliding rods 2 are arranged around the injection pipe 1, and multiple grooves 5 and multiple sliding rods 2 are correspondingly arranged, with multiple outlet holes 21 opened along the length of the sliding rods 2. This allows the repair solution to enter the contaminated area evenly, further improving the repair effect.

[0049] Reference Figure 1 and Figure 2A stabilizing plate 8 is provided at the end of the injection pipe 1, with the stabilizing plate 8 positioned at the end of the injection pipe 1 closest to the ground. A stabilizing rod 81 is provided on the side of the stabilizing plate 8 closest to the ground. After the injection pipe 1 is inserted into the ground, the stabilizing rod 81 is also inserted into the ground. The stabilizing rod 81 and the stabilizing plate 8 provide support for the injection pipe 1, improving the stability of the injection pipe 1 and reducing the phenomenon of the injection pipe 1 shifting when the sliding rod 2 moves.

[0050] Reference Figure 1 and Figure 2 A dosing hole 9 is provided inside the push rod 42, and the dosing hole 9 is set through the pressure plate 41, that is, the dosing hole 9 is internally connected to the injection pipe 1. Repair solution can be added into the injection pipe 1 through the dosing hole 9, and the repair solution can be replenished in real time according to the actual injection situation, thereby improving construction efficiency.

[0051] The implementation principle of this application is as follows: the repair solution is added into the injection pipe 1, and then the second driving component 43 drives the pressure plate 41 to move through the push rod 42, so that the repair solution enters the sliding rod 2 through the inlet port, the intermediate groove 7, the first connecting port 72 and the second connecting port 22 in sequence, and then is injected into the ground through the outlet port 21. At the same time, the sliding rod 2 is moved to drive the outlet port 21 to different positions so that the repair solution is injected into different depths in the ground, so that the repair solution is more evenly distributed and the repair effect is improved.

[0052] This application also discloses a method for remediating groundwater contaminated with hexavalent chromium, using the aforementioned remediation device for groundwater contaminated with hexavalent chromium.

[0053] A method for remediating hexavalent chromium-contaminated groundwater includes the following steps:

[0054] S1, add repair solution into injection pipe 1;

[0055] S2, insert the injection pipe 1 into the ground;

[0056] S3, the second driving component 43 drives the push rod 42 to move, the push rod 42 moves and drives the pressing plate 41 to move, the pressing plate 41 pushes the repair solution into the sliding rod 2 through the inlet 71, the intermediate tank 7, the first connecting port 72 and the second connecting port 22 in sequence, and finally enters the contaminated area through the outlet 21.

[0057] S4, after the injection of medicine in this area is completed, the first driving member 31 drives the sliding rod 2 to move, and the sliding rod 2 drives the medicine outlet 21 to different positions to inject medicine at different positions;

[0058] S5, when the repair solution in the injection pipeline 1 is insufficient, the second driving component 43 drives the pressure plate 41 to move in the opposite direction, and at the same time, the repair solution is introduced into the injection pipeline 1 through the dosing hole 9.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A remediation device for hexavalent chromium-contaminated groundwater, comprising a chemical injection pipeline (1), characterized in that: A sliding rod (2) is slidably provided on the side of the injection pipe (1) in the vertical direction. A drug outlet hole (21) is provided on the side of the sliding rod (2). The sliding rod (2) is hollow and the interior of the sliding rod (2) is connected to the interior of the injection pipe (1). A control component (3) and a drug pressing component (4) are provided on the injection pipe (1). The control component (3) is connected to the sliding rod (2) to adjust the position of the sliding rod (2). The drug pressing component (4) is used to squeeze the solution in the injection pipe (1) through the drug outlet hole (21). The side of the injection pipe (1) is provided with a groove (5), and the sliding rod (2) is slidably disposed in the groove (5). The outer side of the sliding rod (2) and the side of the injection pipe (1) are in the same arc surface, and the sliding rod (2) is locked in the groove (5). The injection pipe (1) is provided with an installation plate (6), and an installation rod (61) is provided on the side of the installation plate (6) away from the injection pipe (1). The control component (3) includes a first driving member (31), a control sleeve (32) and a control ring (33). The control sleeve (32) is rotatably disposed outside the installation rod (61). The outer side of the control sleeve (32) is provided with a thread along the length direction of the installation rod (61). The control ring (33) is sleeved on the outer side of the control sleeve (32) and is threadedly connected to the control ring (33). The control ring (33) is connected to the sliding rod (2). The first driving member (31) is connected to the installation rod (61). The output end of the first driving member (31) is provided with a first gear (311). The outer circumferential of the control sleeve (32) is provided with a first tooth groove (321) that meshes with the first gear (311). The inside of the side wall of the injection pipe (1) is provided with an intermediate groove (7), and the inside of the injection pipe (1) is provided with an inlet (71) that communicates with the intermediate groove (7). The side wall of the slide groove (5) is provided with a first connecting port (72) that communicates with the intermediate groove (7). The side of the sliding rod (2) is provided with a second connecting port (22) that communicates with its interior. The interior of the sliding rod (2) is connected to the intermediate groove (7) through the first connecting port (72) and the second connecting port (22).

2. The hexavalent chromium contaminated groundwater remediation device according to claim 1, characterized in that: The second connecting port (22) is elongated along the sliding direction of the sliding rod (2).

3. The hexavalent chromium contaminated groundwater remediation device according to claim 1, characterized in that: The drug-pressing assembly (4) includes a drug-pressing disc (41), a push rod (42), and a second driving member (43). The drug-pressing disc (41) is slidably disposed in the drug injection pipe (1). The side of the drug-pressing disc (41) and the inner wall of the drug injection pipe (1) slide against each other. The push rod (42) is connected to the drug-pressing disc (41). A through groove (611) is provided on the mounting rod (61). The push rod (42) extends to the outside of the mounting rod (61) through the through groove (611). A drug-pressing gear (431) is provided at the output end of the second driving member (43). A drug-pressing tooth groove (421) that meshes with the drug-pressing gear (431) is provided on the side of the push rod (42) along its length direction.

4. The hexavalent chromium contaminated groundwater remediation device according to claim 1, characterized in that: The end of the injection pipe (1) is provided with a stabilizing plate (8), and a stabilizing rod (81) is provided on the side of the stabilizing plate (8) near the ground. The stabilizing rod (81) is inserted into the ground.

5. The hexavalent chromium contaminated groundwater remediation device according to claim 1, characterized in that: Multiple sliding rods (2) are provided around the injection pipe (1), and multiple drug outlet holes (21) are provided at intervals along the length direction of the sliding rods (2).

6. The hexavalent chromium contaminated groundwater remediation device according to claim 2, characterized in that: The inlet (71) is located near the bottom of the injection pipe (1).

7. A method for remediating hexavalent chromium-contaminated groundwater, employing the hexavalent chromium-contaminated groundwater remediation device as described in claim 3, characterized in that, Includes the following steps: Add repair solution into the injection pipeline (1); Insert the injection tube (1) into the ground; The second driving component (43) drives the push rod (42) to move. The movement of the push rod (42) drives the pressure plate (41) to move. The pressure plate (41) pushes the repair solution into the sliding rod (2) through the inlet (71), the intermediate tank (7), the first connecting port (72) and the second connecting port (22) in sequence, and finally into the contaminated area through the outlet (21). After the injection is completed, the first driving component (31) drives the sliding rod (2) to move, and the sliding rod (2) drives the drug outlet (21) to different positions to inject drugs at different positions; When the repair solution in the injection pipeline (1) is insufficient, the second drive unit (43) drives the pressure plate (41) to move in the opposite direction, and at the same time, the repair solution is introduced into the injection pipeline (1) through the dosing hole (9).

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