In-situ chemical treatment device and method for repairing soil and underground water

Abstract

The invention discloses an in-situ chemical treatment device and method for soil and underground water remediation in the technical field of environmental remediation. The in-situ chemical treatment device comprises a mixing device, conveying equipment and a bracket, a mounting plate and a driving part for driving the mounting plate to lift are arranged on the bracket, and an injection assembly is arranged on the mounting plate; the injection assembly comprises an injection head communicated with the conveying equipment and two cover bodies used for covering the bottom end of the injection head, and a driving assembly used for driving the cover bodies to move is arranged on the injection head; the bottom end of the injection head is covered with the two cover bodies, so that an outlet of the injection head is separated from the outside, it is guaranteed that soil cannot enter the injection head when the injection head is inserted into the soil, the injection head cannot be blocked, and the remediation efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental remediation, and specifically to an in-situ chemical treatment device and method for soil and groundwater remediation. Background Art

[0002] With the rapid development of industrialization and urbanization, the problems of soil and groundwater pollution are becoming increasingly serious. In particular, the leakage and diffusion of heavy metals, organic pollutants (such as petroleum hydrocarbons, benzene series, polycyclic aromatic hydrocarbons, etc.) and refractory chemical substances pose a serious threat to the ecological environment and human health. To ensure that the repair reagent can directly reach the pollution source and play a role in its most effective area, generally, the injection head for injecting the repair reagent is inserted deep into the soil. However, during the process of directly inserting the injection head into the soil, since the outlet of the injection head is generally exposed to the outside, the soil is easily squeezed into its interior during the process of the injection head entering the soil, resulting in blockage of the injection head and affecting the repair efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide an in-situ chemical treatment device and method for soil and groundwater remediation, so as to solve the problem that during the process of directly inserting the injection head into the soil as mentioned in the above background art, since the outlet of the injection head is generally exposed to the outside, the soil is easily squeezed into its interior during the process of the injection head entering the soil, resulting in blockage of the injection head.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An in-situ chemical treatment device for soil and groundwater remediation, comprising: a mixing device, a conveying device and a bracket;

[0005] An installation plate and a driving member for driving the installation plate to lift are provided on the bracket, and an injection assembly is provided on the installation plate;

[0006] Among them, the injection assembly includes an injection head communicated with the conveying device and two covers for covering the bottom end of the injection head, and a driving assembly for driving the covers to move is provided on the injection head.

[0007] Preferably, two installation holes are provided on the side wall of the injection head, the driving assembly includes a push rod slidably arranged in the installation hole and an elastic reset member connected to the push rod, a fixing member is provided between the two push rods, and the mutually remote ends of the two push rods are respectively connected to the two covers.

[0008] Preferably, the fixing member includes a kit, a mounting groove provided on the inner side wall of the kit, a limiting block slidably provided in the mounting groove, and an elastic element connected to the limiting block. The two push rods are respectively a first push rod and a second push rod. The kit is fixedly provided on the first push rod and sleeved on the outer wall of the second push rod. A limiting groove is provided on the inner side wall of the second push rod, and the limiting block is inserted into the limiting groove. A slotted opening is provided on the kit, and a moving block is slidably provided in the slotted opening. A flexible connecting member is provided between the moving block and the limiting block.

[0009] Preferably, the injection head includes an upper pipe fitting and a lower pipe fitting. An annular groove is provided on the upper pipe fitting, and an annular block for inserting into the annular groove is provided on the lower pipe fitting. Threads are provided on both the outer side wall of the annular block and the inner side wall of the annular groove.

[0010] Preferably, an air flow channel is provided on the injection head, and a gas supply device for communicating with the air flow channel is provided on the mounting plate.

[0011] Preferably, the gas supply device includes a gas storage tank and a partition provided in the gas storage tank. The partition is used to divide the inner cavity of the gas storage tank into a first cavity and a second cavity that communicate with each other. A piston plate and an elastic member connected to the piston plate are slidably provided in the first cavity. A moving rod is provided on the piston plate, and the moving rod extends to the outside of the gas storage tank and is connected to a support plate. A through hole is provided on the side wall of the first cavity, and an air outlet for communicating with the air flow channel is provided on the second cavity.

[0012] Preferably, a first baffle and a second baffle for separating the first cavity and the second cavity are provided in the second cavity, and the second baffle is slidably provided in the second cavity;

[0013] Wherein, a storage tank for communicating with the injection head is provided on the mounting plate. The storage tank is communicated with the outlet of the conveying device. A movable plate located at the liquid inlet of the storage tank is slidably provided in the storage tank. A connecting rod is provided between the movable plate and the second baffle.

[0014] Preferably, the in-situ chemical treatment device further includes a vehicle body, and the mixing device and the conveying device are both provided on the vehicle body.

[0015] Preferably, an in-situ chemical treatment method for soil and groundwater remediation, using the above-mentioned in-situ chemical treatment device for soil and groundwater remediation, includes the following steps:

[0016] S1: Raw materials are added to the mixing device for mixing to form a remediation liquid;

[0017] S2: Place the bracket in the repair area, drive the mounting plate downward through the driving member, insert the injection assembly into the soil until a predetermined depth, drive the housing to move through the driving assembly, expose the bottom end of the injection head, operate the conveying device, and inject the repair liquid inside the mixing device into the soil through the injection head to repair the soil and groundwater.

[0018] Compared with the prior art, the beneficial effect of the present invention is that the bottom end of the injection head is covered by two housings, separating the outlet of the injection head from the outside world, ensuring that soil does not enter the inside of the injection head when the injection head is inserted into the soil, preventing the injection head from being blocked, and guaranteeing the repair efficiency. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the in-situ chemical treatment device of the present invention;

[0020] Figure 2 is a schematic structural diagram of the connection between the bracket and the mounting plate of the present invention;

[0021] Figure 3 is a schematic cross-sectional view of the connection between the injection head and the housing of the present invention;

[0022] Figure 4 is of the present invention Figure 3 is an enlarged schematic diagram of the structure at A in;

[0023] Figure 5 is of the present invention Figure 3 is an enlarged schematic diagram of the structure at B in;

[0024] Figure 6 is a schematic cross-sectional view of the connection between the push rod and the fixing member of the present invention;

[0025] Figure 7 is a schematic cross-sectional view of the connection between the mounting plate and the storage tank of the present invention;

[0026] Figure 8 is a schematic cross-sectional view of the gas storage tank of the present invention.

[0027] In the figure: 1, vehicle body; 2, mixing device; 3, conveying device; 4, bracket; 5, mounting plate; 6, injection assembly; 61, injection head; 611, upper pipe fitting; 612, lower pipe fitting; 613, annular block; 614, annular groove; 615, air flow channel; 62, housing; 63, push rod; 631, limit groove; 64, elastic reset member; 65, fixing member; 651, kit; 652, slotted opening; 653, moving block; 654, limit block; 655, flexible connecting member; 7, storage tank; 8, driving member; 9, gas supply device; 91, gas storage tank; 92, moving rod; 93, elastic member; 94, partition plate; 95, support plate; 96, piston plate; 97, through hole; 98, first baffle; 99, second baffle; 10, movable plate. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] Please refer to Figure 1 , an in-situ chemical treatment device for soil and groundwater remediation, including: a vehicle body 1 (such as a mobile trolley), a mixing device 2 is installed on the top wall of the vehicle body 1 (the mixing device 2 includes a mixing tank, a motor provided on the top of the mixing tank, and stirring blades installed on the output shaft of the motor, the stirring blades are located in the inner cavity of the mixing tank, and the mixing tank includes a box body and a box cover detachably connected to the box body), a conveying device 3 (pump) and a bracket 4; the mixing device 2 is used for mixing raw materials to prepare a remediation liquid, and the mixing device 2 stirs the remediation liquid to ensure that the remediation liquid will not precipitate;

[0031] It should be noted that the bracket 4 is clamped by a clamp on the top of the vehicle body 1 for fixing the unused bracket 4 on the vehicle body 1.

[0032] Please refer to Figure 1 and Figure 2 , a mounting plate 5 is slidably arranged on the bracket 4, a driving member 8 is arranged on the bracket 4, the driving member 8 includes a motor, a screw rod arranged on the output shaft of the motor, and a nut sleeve sleeved on the outer wall of the screw rod, the nut sleeve is slidably arranged on the bracket 4, the nut sleeve is connected to the mounting plate 5, and the motor drives the screw rod to rotate, so that the nut sleeve drives the mounting plate 5 to move up or down.

[0033] Please refer to Figure 2 , an injection assembly 6 is arranged on the mounting plate 5;

[0034] Among them, please refer to Figure 2 and Figure 3 , the injection assembly 6 includes an injection head 61 and two cover bodies 62, the two cover bodies 62 form a cylindrical member, the bottom of the cylindrical member is sealed, the cylindrical member is sleeved on the outer wall of the bottom of the injection head 61 for blocking the bottom outlet of the injection head 61, the injection head 61 is installed at the bottom of the mounting plate 5, the inlet of the injection head 61 is communicated with the outlet of the conveying device 3 through a pipeline, and a driving assembly is arranged on the injection head 61 for driving the cover body 62 to move.

[0035] It should be noted that the number of the injection assemblies 6 is specifically set according to actual needs and can be multiple.

[0036] An in-situ chemical treatment method for soil and groundwater remediation, the specific steps are as follows:

[0037] First, add the raw materials required to prepare the remediation liquid into the interior of the mixing device 2 and mix them to make the remediation liquid;

[0038] Second, move the mixing device 2 and the support 4 to a predetermined position by the mobile vehicle body 1. After fixing the support 4 in the remediation area, drive the mounting plate 5 to move downward by the driving member 8, insert the injection assembly 6 into the soil until the injection assembly 6 reaches the predetermined depth. The driving assembly drives the cover body 62 to move, exposing the bottom end of the injection head 61. Then the conveying device 3 works, and injects the remediation liquid inside the mixing device 2 into the soil through the injection head 61 to remediate the soil and groundwater.

[0039] In this embodiment, as a further optimized solution, please refer to Figure 3 , the driving assembly can be a telescopic device, such as a hydraulic cylinder. The mobile end of the telescopic device is connected to the cover body 62 and is used to drive the cover body 62 to approach or move away from the injection head 61; and the driving assembly can also be another component, specifically as follows:

[0040] Please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6, the driving component includes a push rod 63, an elastic reset member 64 (spring), and a fixing member 65; two mounting holes are formed on the left and right side walls of the injection head 61, and there are two push rods 63 which are respectively slidably inserted into the inner cavities of the two mounting holes (the push rod 63 and the mounting hole are sealed), the elastic reset member 64 is installed between the push rod 63 and the mounting hole, the mutually remote ends of the two push rods 63 are respectively connected to the two cover bodies 62, and a fixing member 65 is arranged between the two push rods 63; the fixing member 65 includes a sleeve 651, a mounting groove formed on the inner side wall of the sleeve 651, a limiting block 654 slidably arranged in the mounting groove, and an elastic element (spring) connected to the limiting block 654, the two push rods 63 are respectively a first push rod and a second push rod, the sleeve 651 is fixedly arranged at the end of the first push rod and sleeved on the outer wall of the end of the second push rod, a limiting groove 631 is formed on the inner side wall of the second push rod, the limiting block 654 is inserted into the inner cavity of the limiting groove 631, a slot 652 is formed on the top wall of the sleeve 651, a moving block 653 is slidably arranged in the inner cavity of the slot 652 (the moving block 653 can move up and down, and the outer side wall of the moving block 653 is in close fit with the inner side wall of the slot 652, achieving a sealing effect), and a flexible connecting member 655 (such as a rope) is arranged between the moving block 653 and the limiting block 654; after the injection assembly 6 is inserted into a predetermined depth of the soil, the conveying device 3 inputs the repair liquid inside the mixing device 2 into the injection head 61. Since the cover body 62 does not move at this time, the repair liquid will stay inside the injection head 61, increasing the pressure inside the injection head 61 to squeeze the moving block 653, causing it to move and pull the flexible connecting member 655, moving the limiting block 654 out of the limiting groove 631, releasing the fixed connection between the sleeve 651 and the second push rod, thereby disconnecting the connection between the two push rods 63. Under the action of the elastic reset member 64, the push rod 63 drives the cover body 62 to automatically move outwards.

[0041] It should be noted that the side of the limiting block 654 facing the second push rod is an arc surface; when pushing the cover body 62 towards the injection head 61, the two push rods 63 move closer, causing the second push rod to contact the arc surface of the limiting block 654 to push the limiting block 654 towards the inside of the mounting groove, ensuring that the limiting block 654 does not prevent the two push rods 63 from moving closer; after the limiting block 654 is aligned with the limiting groove 631, the elastic element pushes the limiting block 654 into the limiting groove 631 to connect the fixing member 65 with the second push rod for resetting the cover body 62.

[0042] In this embodiment, as a further optimized solution, please refer to Figure 3 and Figure 4, the injection head 61 includes an upper pipe fitting 611 and a lower pipe fitting 612. An annular groove 614 is provided at the bottom end of the upper pipe fitting 611, and an annular block 613 is provided at the top of the lower pipe fitting 612. The annular block 613 is inserted into the inner cavity of the annular groove 614. Threads are provided on the outer side wall of the annular block 613 and the inner side wall of the annular groove 614, and the threads of the two match each other. By rotating the lower pipe fitting 612, the position of the annular block 613 in the inner cavity of the annular groove 614 can be changed, so that the length of the injection head 61 can be adjusted according to requirements.

[0043] Embodiment 2

[0044] As a further optimized solution of Embodiment 1, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , an air flow channel 615 is provided inside the injection head 61, and a blowing port is provided on the outer side wall of the injection head 61. The blowing port is communicated with the air flow channel 615. The blowing port is located inside the cover 62. A gas supply device 9 is provided on the mounting plate 5. The air outlet of the gas supply device 9 is communicated with the air flow channel 615. When the gas supply device 9 works, gas is injected into the air flow channel 615, so that the blowing port blows air towards the cover 62, which is used to push the cover 62 away from the injection head 61 to ensure that the injection head 61 will disappear when it is blocked.

[0045] In this embodiment, as a further optimized solution, the gas supply device 9 can be an air pump; and the gas supply device 9 can also be composed in another way, as follows:

[0046] Please refer to Figure 2 , Figure 7 and Figure 8 , the gas supply device 9 includes a gas storage tank 91 and a partition plate 94 provided in the inner cavity of the gas storage tank 91. The partition plate 94 is used to divide the inner cavity of the gas storage tank 91 into a first cavity and a second cavity that are communicated with each other. A piston plate 96 is slidably provided in the inner cavity of the first cavity. An elastic member 93 (spring) is provided between the first cavity and the piston plate 96. A moving rod 92 is provided at the bottom of the piston plate 96. The bottom end of the moving rod 92 extends to the outside of the gas storage tank 91 and is connected to a support plate 95. A through hole 97 is provided on the side wall of the first cavity, and an air outlet hole is provided on the second cavity. The air outlet hole is communicated with the air flow channel 615. When the mounting plate 5 drives the injection assembly 6 to move down and insert into the soil, the support plate 95 will contact the ground and push the piston plate 96 upward, so that the piston plate 96 moves above the through hole 97, compressing the air inside the first cavity into the inside of the second cavity and entering the air flow channel 615 through the air outlet for air supply. When the mounting plate 5 moves up and resets, the elastic member 93 pushes the piston plate 96 to move down below the through hole 97, so that the outside air enters the inside of the first cavity.

[0047] In this embodiment, as a further optimized solution, please refer toFigure 7 and Figure 8 , a first baffle 98 and a second baffle 99 are provided in the inner cavity of the second cavity. The first baffle 98 and the second baffle 99 partition the first cavity and the second cavity. The second baffle 99 is slidably provided in the second cavity; a storage tank 7 is provided on the mounting plate 5. The storage tank 7 is respectively communicated with the inlet of the injection head 61 and the outlet of the conveying device 3. A movable plate 10 is slidably provided in the inner cavity of the storage tank 7. A spring (for driving the movable plate 10 to reset) is installed between the movable plate 10 and the storage tank 7. The movable plate 10 is located at the inlet of the storage tank 7. A connecting rod is provided between the movable plate 10 and the second baffle 99; by partitioning the first cavity and the second cavity through the first baffle 98 and the second baffle 99, when the piston plate 96 moves, compressed air will not be immediately introduced into the inside of the air flow channel 615, avoiding the influence of the cover body 62; when the conveying device 3 conveys the repair fluid inside the mixing device 2 into the inside of the injection head 61, the repair fluid will first enter the inside of the storage tank 7, and the repair fluid will also push the movable plate 10 to move, so that the connecting rod drives the movable plate 10 to move, and the first cavity and the second cavity are penetrated. At this time, the compressed air inside the first cavity will enter the inner cavity of the air flow channel 615.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-situ chemical treatment device for soil and groundwater remediation, characterized in that: Including: A mixing device (2), a conveying device (3) and a bracket (4); An installation plate (5) and a driving member (8) for driving the installation plate (5) to lift are provided on the bracket (4), and an injection assembly (6) is provided on the installation plate (5); Among them, the injection assembly (6) includes an injection head (61) communicated with the conveying device (3) and two cover bodies (62) for covering the bottom end of the injection head (61), and a driving assembly for driving the cover bodies (62) to move is provided on the injection head (61).

2. An in-situ chemical treatment device for soil and groundwater remediation according to claim 1, characterized in that: Two mounting holes are provided on the side wall of the injection head (61), the driving assembly includes a push rod (63) slidably arranged in the mounting hole and an elastic reset member (64) connected to the push rod (63), a fixing member (65) is provided between the two push rods (63), and the mutually remote ends of the two push rods (63) are respectively connected to the two cover bodies (62).

3. An in-situ chemical treatment device for soil and groundwater remediation according to claim 2, characterized in that: The fixing member (65) includes a sleeve (651), a mounting groove provided on the inner side wall of the sleeve (651), a limiting block (654) slidably arranged in the mounting groove, and an elastic element connected to the limiting block (654). The two push rods (63) are respectively a first push rod and a second push rod. The sleeve (651) is fixedly arranged on the first push rod and sleeved on the outer wall of the second push rod. A limiting groove (631) is provided on the inner side wall of the second push rod. The limiting block (654) is inserted into the limiting groove (631). A slotted groove (652) is provided on the sleeve (651), a moving block (653) is slidably arranged in the slotted groove (652), and a flexible connecting member (655) is provided between the moving block (653) and the limiting block (654).

4. An in-situ chemical treatment device for soil and groundwater remediation according to claim 1, characterized in that: The injection head (61) includes an upper pipe fitting (611) and a lower pipe fitting (612). An annular groove (614) is provided on the upper pipe fitting (611), and an annular block (613) for inserting into the annular groove (614) is provided on the lower pipe fitting (612). Threads are provided on the outer side wall of the annular block (613) and the inner side wall of the annular groove (614).

5. An in-situ chemical treatment device for soil and groundwater remediation according to claim 1, characterized in that: An air flow channel (615) is provided on the injection head (61), and an air supply device (9) for communicating with the air flow channel (615) is provided on the installation plate (5).

6. An in-situ chemical treatment device for soil and groundwater remediation according to claim 5, characterized in that: The air supply device (9) includes an air storage tank (91) and a partition plate (94) provided in the air storage tank (91). The partition plate (94) is used for dividing the inner cavity of the air storage tank (91) into a first cavity and a second cavity which are communicated with each other. A piston plate (96) and an elastic member (93) connected to the piston plate (96) are slidably arranged in the first cavity. A moving rod (92) is provided on the piston plate (96). The moving rod (92) extends to the outside of the air storage tank (91) and is connected to a support plate (95). A through hole (97) is provided on the side wall of the first cavity. An air outlet hole for communicating with the air flow channel (615) is provided on the second cavity.

7. An in-situ chemical treatment device for soil and groundwater remediation according to claim 6, characterized in that: A first baffle (98) and a second baffle (99) for partitioning the first cavity and the second cavity are provided in the second cavity. The second baffle (99) is slidably arranged in the second cavity; Among them, a storage tank (7) for communicating with an injection head (61) is provided on the mounting plate (5), the storage tank (7) is communicated with the outlet of the conveying device (3), a movable plate (10) located at the liquid inlet of the storage tank (7) is slidably arranged in the storage tank (7), and a connecting rod is arranged between the movable plate (10) and the second baffle (99).

8. An in-situ chemical treatment device for soil and groundwater remediation according to claim 1, characterized in that: The in-situ chemical treatment device further includes a vehicle body (1), and both the mixing device (2) and the conveying device (3) are arranged on the vehicle body (1).

9. An in-situ chemical treatment method for soil and groundwater remediation, using an in-situ chemical treatment device for soil and groundwater remediation according to any one of claims 1-8, characterized in that: It includes the following steps: S1: Raw materials are added into the mixing device (2) for mixing to form a repair liquid; S2: Place the bracket (4) in the repair area, drive the mounting plate (5) to move downward through the driving member (8), insert the injection assembly (6) into the soil until a predetermined depth, drive the assembly to drive the cover body (62) to move, expose the bottom end of the injection head (61), the conveying device (3) works, and inject the repair liquid inside the mixing device (2) into the soil through the injection head (61) to repair the soil and groundwater.

Images