A gradient degradation treatment device for groundwater chlorinated hydrocarbon pollutants

Abstract

The application discloses a groundwater chlorinated hydrocarbon pollutant gradient degradation treatment device in the technical field of groundwater pollution remediation, which comprises a permeation reaction wall, a plurality of groups of water guide mechanisms and a plurality of groups of medicament feeding mechanisms.The permeation reaction wall comprises a wall body, and a plurality of groups of treatment cavities are formed in the wall body.The water guide mechanism comprises a pump body, a water pumping pipe and a water discharging pipe which are respectively arranged at the input end and the output end of the pump body.The water pumping pipe and the water discharging pipe in adjacent two groups of water guide mechanisms extend into a treatment cavity.The output end of the medicament feeding mechanism is communicated with the water discharging pipe.The application realizes the directional and sequential transportation of water bodies among the treatment cavities by arranging a plurality of independent treatment cavities in the permeation reaction wall according to the water flow direction and by means of the plurality of groups of water guide mechanisms, and effectively constructs a stable reaction gradient of reduction-transition-oxidation in the pollution plume field by the medicament feeding mechanism linkage to the water guide mechanism for feeding water into the treatment cavities, so that the efficient degradation treatment of the chlorinated hydrocarbon pollutants is realized.

Description

Technical Field

[0001] This invention relates to the field of groundwater pollution remediation, specifically to a gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater. Background Technology

[0002] Chlorinated hydrocarbons are common, persistent organic pollutants in groundwater, exhibiting toxicity, carcinogenicity, and persistence.

[0003] Currently, the widely used chemical injection remediation technology mainly achieves pollutant degradation by directly injecting chemical agents into the groundwater flow path. However, this method has significant limitations in practical applications: Firstly, this injection method relies on the natural flow field of groundwater to achieve agent diffusion and contact with pollutants, making it difficult to construct a stable and spatially differentiated redox reaction gradient within the pollutant plume field. This leads to mixing and interference between reducing and oxidizing agents during migration, or even reaction failure, resulting in poor groundwater treatment effects. Secondly, the dosage of the agents is inconvenient to control flexibly, easily leading to excessive dosage causing waste or insufficient dosage affecting the treatment effect. Therefore, we propose a gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater. Summary of the Invention

[0004] The purpose of this invention is to provide a gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater, which solves the technical problem that existing methods for treating chlorinated hydrocarbon pollutants in groundwater are difficult to construct a stable and spatially differentiated redox reaction gradient within the pollutant plume field, resulting in poor treatment effects on groundwater.

[0005] The present invention achieves the above objectives through the following technical solutions: A gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater, comprising: A permeable reactive wall includes a wall body, with an inlet and an outlet on each side of the wall body, and a plurality of treatment chambers are provided inside the wall body and located between the inlet and the outlet. Several sets of water guiding mechanisms, each water guiding mechanism including a pump body, and a water pumping pipe and a water draining pipe respectively located at the input end and the output end of the pump body; the water pumping pipe and the water draining pipe in two adjacent sets of water guiding mechanisms extend into a processing chamber, the water pumping pipe in the first water guiding mechanism extends into the water inlet, and the water draining pipe in the last water guiding mechanism extends into the water outlet. Several sets of chemical supply mechanisms correspond one-to-one with several sets of treatment chambers, and the output end of the chemical supply mechanism is connected to the drain pipe extending into the treatment chamber by the water guiding mechanism, for supplying chemicals into the drain pipe.

[0006] A further improvement is that the drug supply mechanism includes a housing, several sets of placement cavities opened inside the housing for storing drugs, a receiving cavity opened inside the housing and located below the placement cavity, a control roller rotatably disposed in the receiving cavity, and a collection cavity opened inside the housing and located below the receiving cavity. Several sets of control grooves are opened on the outer circumference of the control roller and at positions corresponding to the placement cavity. An inlet for adding drugs to the control grooves is provided between the receiving cavity and the placement cavity. An outlet for discharging drugs from the control grooves is provided between the receiving cavity and the collection cavity. The collection cavity is connected to a drain pipe through a pipeline. The placement cavity is connected to a replenishment port that penetrates the housing.

[0007] A further improvement is that one end of the shaft of the measuring roller passes through the side wall of the housing and is provided with an impeller drive component. The impeller drive component includes a follower impeller located inside the water pumping pipe. The follower impeller is driven to rotate by the water flowing inside the water pumping pipe. The shaft of the follower impeller is connected to the shaft of the measuring roller through a worm gear assembly.

[0008] A further improvement is that the measuring roller has several sets of assembly cavities that correspond one-to-one with the placement cavity along its axis. A driving block is movably arranged in the assembly cavity. A movable rod is slidably abutted against the outer wall of the driving block at the position corresponding to the measuring groove. One end of the movable rod extends into the corresponding measuring groove and is connected to a movable plate adapted to the measuring groove. An elastic element is sleeved on the outer wall of the movable rod to make it contact the driving block. When the driving block moves, it pushes the movable rod and drives the movable plate to move in the measuring groove. Several sets of drive blocks are connected by a connecting rod group, which is used to independently control the corresponding drive block to move horizontally along the axis of the control roller.

[0009] A further improvement is that the connecting rod group includes several groups of rods that are sequentially sleeved together. One end of each group of rods is sequentially connected to several groups of driving blocks. The other end of each group of rods extends to the outside of the housing and is rotatably sleeved with a connecting block. The connecting block and the housing are connected by a telescopic device. The distance between two adjacent groups of connecting blocks is greater than the length of the assembly cavity. The control roller, the drive block, and the housing are all provided with openings for the connecting rod assembly to pass through, and the vertical cross-section of the drive block is an isosceles trapezoid.

[0010] A further improvement is that a number of control chambers corresponding to the placement chambers are provided inside the housing and located between the receiving chamber and the collecting chamber. The control chambers are connected to the corresponding control slots through channels opened in the housing. The control chambers are provided with receiving seats for receiving the medicine. The inner wall of the control chambers is provided with detection sensors for detecting the weight of the receiving seats. The bottom of the receiving seats is connected to the collecting chamber through a pipeline. The pipeline is provided with a solenoid valve. The solenoid valve and the detection sensor are electrically connected to the controller.

[0011] A further improvement is that the telescopic device is electrically connected to the controller, and the detection sensor includes a standard preset threshold and several preset control thresholds, wherein the several preset control thresholds increase sequentially and are all less than the standard preset threshold. The controller is also configured to control the corresponding telescopic device to drive the rod to move the drive block to a preset position when the detection sensor detects that the weight of the receiving seat has reached a standard preset threshold, so that the movable plate closes the control groove. It is also configured to control the corresponding telescopic device to move the drive block a preset distance when the detection sensor detects that the weight of the receiving seat has reached a preset control threshold, wherein the preset distance is positively correlated with the size of the preset control threshold.

[0012] A further improvement is that the processing chamber is provided in three sets, which are, in sequence, a reduction chamber, a transition chamber, and an oxidation degradation chamber along the direction from the inlet to the outlet. Each of the processing chambers is equipped with a sensor group for collecting water quality data. The sensor group is electrically connected to a controller, and the controller is connected to an external display device.

[0013] A further improvement is that the pumping pipe and drain pipe in both adjacent sets of water guiding mechanisms extend into the processing chamber and are connected to a mixing mechanism, which includes: A connecting seat is located inside the processing chamber. An impeller body is rotatably installed inside the seat, and a port is provided on one side. The impeller body is driven to rotate by water drawn in by the pumping pipe or water discharged by the drain pipe. A mixing rod is mounted on a connecting seat, with one end connected to the shaft of the impeller body. The outer wall of the mixing rod is provided with several sets of mixing blades.

[0014] A further improvement is that a cavity is opened inside the mixing rod located in the oxidation degradation chamber, and several sets of ventilation holes communicating with the cavity are opened on the outer wall of the mixing rod. A pipeline is rotatably connected to the top of the mixing rod, and one end of the pipeline is connected to the output end of the aeration device.

[0015] The beneficial effects of this invention are as follows: This invention overcomes the drawbacks of mixed reaction environments and mutual interference of reagents by setting up multiple independent treatment chambers inside the permeable reaction wall according to the water flow direction, and by using multiple sets of water guiding mechanisms to achieve directional and sequential water delivery between the treatment chambers. At the same time, the water guiding mechanism that supplies water to the treatment chambers is linked to the reagent supply mechanism. This effectively constructs a stable reaction gradient of reduction-transition-oxidation in the pollutant plume field, realizing the efficient degradation and treatment of chlorinated hydrocarbon pollutants. Furthermore, the reagent supply mechanism can add different types of reagents into the treatment chambers and flexibly adjust the dosage of different types of reagents. This effectively prevents economic waste and secondary pollution risks caused by excessive reagent dosage, and also avoids incomplete reactions and accumulation of intermediate products caused by insufficient dosage. This significantly improves the accuracy, adaptability and overall treatment efficiency of the remediation process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the gradient degradation treatment device of the present invention; Figure 2 For the present invention Figure 1 Structural side view; Figure 3 For the present invention Figure 1 Structural sectional view; Figure 4 This is a schematic diagram of the drug supply mechanism of the present invention; Figure 5 For the present invention Figure 4 Structural sectional view; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of structure A in the image; Figure 7 For the present invention Figure 3 An enlarged schematic diagram of the B structure in the image.

[0017] In the diagram: 100, Permeation reaction wall; 101, Wall; 102, Inlet; 103, Sensor group; 104, Outlet; 105, Treatment chamber; 200, Water guiding mechanism; 201, Pump body; 202, Pumping pipe; 203, Drainage pipe; 300, Reagent supply mechanism; 301, Housing; 302, Placement chamber; 303, Control roller; 304, Control groove; 305, Control chamber; 3 06. Material receiving seat; 307. Detection sensor; 308. Material collection chamber; 309. Drive block; 310. Movable rod; 311. Movable plate; 312. Connecting rod assembly; 313. Impeller drive component; 3121. Rod body; 3122. Telescopic device; 400. Mixing mechanism; 401. Connecting seat; 402. Impeller body; 403. Mixing rod; 404. Vent hole; 500. Aeration device. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] The gradient degradation treatment device in this application is deployed at a designated location where groundwater flows, which will not be described in detail here.

[0020] Example 1 Please see the appendix Figures 1-5 A gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater, comprising: The permeable reactive wall 100 includes a wall 101, with an inlet 102 and an outlet 104 on both sides of the wall 101. The inlet 102 faces the direction of water flow. Several sets of treatment chambers 105 are provided inside the wall 101 and located between the inlet 102 and the outlet 104 to realize the gradient degradation of groundwater. Preferably, the wall 101 is higher than the highest water level in the deployment area to ensure the purification and remediation of groundwater; Optionally, as shown in the appendix Figure 3 As shown, the processing chamber 105 consists of three groups; Several sets of water guiding mechanisms 200, each including a pump body 201, and a water pumping pipe 202 and a water draining pipe 203 respectively located at the input and output ends of the pump body 201. Specifically, the number of water guiding mechanisms 200 is one more than the number of processing chambers 105. If there are three sets of processing chambers 105, then there are four sets of water guiding mechanisms 200. The pumping pipe 202 and drain pipe 203 in two adjacent sets of water guiding mechanisms 200 both extend into a treatment chamber 105. The pumping pipe 202 in the first water guiding mechanism 200 extends into the inlet 102, and the drain pipe 203 in the last water guiding mechanism 200 extends into the outlet 104; as shown in the attached diagram. Figure 3 As shown, the first water guiding mechanism 200 at the beginning is the first water guiding mechanism 200 on the left, with its pump pipe 202 located inside the inlet 102 and its drain pipe 203 located inside the first set of processing chambers 105. The last water guiding mechanism 200 is the first water guiding mechanism 200 on the right, with its pump pipe 202 located inside the last set of processing chambers 105 and its drain pipe 203 located inside the outlet 104. When the system is running, the first water guiding mechanism 200 draws the water in the inlet 102 to the first treatment chamber 105 for treatment. Then, through the step-by-step pumping action of the intermediate multiple water guiding mechanisms 200, the water flows through each subsequent treatment chamber 105 and receives corresponding treatment. Finally, the end water guiding mechanism 200 draws the completely treated water from the last treatment chamber 105 to the outlet 104 for discharge. Several sets of chemical supply mechanisms 300 correspond one-to-one with several sets of treatment chambers 105, that is, the two are the same in number, and the output end of the chemical supply mechanism 300 is connected to the drain pipe 203 extending from the water guiding mechanism 200 into the treatment chamber 105, for supplying chemicals into the drain pipe 203 so that the water body reacts and is treated in the corresponding treatment chamber 105 in combination with the corresponding chemicals. With attachment Figure 3 As shown, the first treatment chamber 105 and the first agent supply mechanism 300 are located near the inlet 102, the third treatment chamber 105 and the third agent supply mechanism 300 are located near the outlet 104, and the second treatment chamber 105 and the second agent supply mechanism 300 are located between the two. The first agent supply mechanism 300 is used to inject agents into the drain pipe 203 leading to the first treatment chamber 105, the second agent supply mechanism 300 is used to inject agents into the drain pipe 203 leading to the second treatment chamber 105, and the third agent supply mechanism 300 is used to inject agents into the drain pipe 203 leading to the third treatment chamber 105, thereby achieving independent and precise agent addition to each treatment chamber 105. Optionally, the agent injected by the first agent supply mechanism 300 is: nano zero-valent iron powder, sodium lactate (or other slow-release carbon source). The agents injected by the second agent supply mechanism 300 are: slow-release oxidant (such as magnesium peroxide MgO2), pH buffer (such as sodium bicarbonate) and nitrate (such as calcium nitrate Ca(NO3)2). The agents injected by the third agent supply mechanism 300 are: sodium persulfate (Na2S2O8), activator (such as ferric citrate, sodium hydroxide) and hydrogen peroxide (H2O2). Of course, it is not limited to the above-mentioned medicines, which will not be discussed in detail here.

[0021] Please see the appendix Figures 4-5 Preferably, the drug supply mechanism 300 of this embodiment includes a housing 301, several sets of placement cavities 302 opened in the housing 301 for storing drugs, a receiving cavity opened in the housing 301 and located below the placement cavity 302, a control roller 303 rotatably disposed in the receiving cavity, and a collection cavity 308 opened in the housing 301 and located below the receiving cavity. Several sets of control grooves 304 are opened on the outer circumference of the control roller 303 and at positions corresponding to the placement cavity 302. An inlet for adding drugs to the control grooves 304 is provided between the receiving cavity and the placement cavity 302. An outlet for discharging drugs from the control grooves 304 is provided between the receiving cavity and the collection cavity 308. The collection cavity 308 is connected to a drain pipe 203 through a pipeline. The placement cavity 302 is connected to a replenishment port that penetrates the housing 301. The replenishment port has a cover. In this embodiment, there are three sets of placement cavities 302 to place different agents, which can be in powder, granule or liquid form. The vertical cross-section of the receiving cavity is circular and is adapted to the measuring roller 303. The vertical cross-section of the collecting cavity 308 is semi-circular to collect the downward-facing agents in each placement cavity 302. In actual use, the measuring roller 303 rotates so that the measuring groove 304 on its outer wall corresponds to the feed inlet, and then the medicine in the placement cavity 302 is received from the feed inlet. As the measuring roller 303 continues to rotate, when the measuring groove 304 corresponds to the discharge outlet, the medicine in the measuring groove 304 enters the collection cavity 308 through the discharge outlet, and then enters the drain pipe 203 through the collection cavity 308 and the pipeline to mix with the water flowing in the drain pipe 203.

[0022] Please see the appendix Figures 4-5 Preferably, in this embodiment, one end of the shaft of the measuring roller 303 passes through the side wall of the housing 301 and is provided with an impeller drive component 313, and the other end of the shaft of the measuring roller 303 is rotatably connected to the inner wall of one side of the receiving cavity so that the measuring roller 303 can rotate. Optionally, wear-resistant sealing rings that fit against the inner wall of the receiving cavity can be embedded on the outer circumference of the measuring roller 303 and at positions corresponding to both sides of the measuring groove 304 to ensure the sealing of the contact position. This will not be described in detail here. In this embodiment, the impeller drive component 313 includes a follower impeller located inside the pumping pipe 202. When the pump body 201 pumps water, the follower impeller is driven to rotate by the water flowing inside the pumping pipe 202. The shaft of the follower impeller is connected to the shaft of the control roller 303 via a worm gear assembly. The worm gear assembly includes worm teeth located on the shaft of the control roller 303 and worm wheels located on the shaft of the follower impeller. When the pumping pipe 202 pumps water, the rotation of the follower impeller drives the control roller 303 to rotate via the worm gear assembly. In turn, the control roller 303 controls the quantitative entry of the reagent in the placement chamber 302 into the drain pipe 203, which then enters the corresponding treatment chamber 105 with the water for degradation treatment.

[0023] It should be noted that in practice, a soil cushion layer is usually laid on the upper part of the permeable reactive wall 100. The pump body 201 and the reagent supply mechanism 300 in the water guiding mechanism 200 of this application can be installed on the soil cushion layer to facilitate the operator to perform installation, commissioning, daily maintenance and real-time monitoring, thereby improving the operability and maintenance convenience of the device, while reducing the occupation of underground space and environmental interference.

[0024] Example 2 Please see the appendix Figures 5-6Based on Embodiment 1, in this embodiment, the control roller 303 has several sets of assembly cavities along its axis that correspond one-to-one with the placement cavity 302. That is, the number of assembly cavities is the same as the number of placement cavities 302. A drive block 309 is movably disposed within each assembly cavity. Movable rods 310 slide against the outer wall of the drive block 309 at positions corresponding to the control grooves 304. The number of movable rods 310 is the same as the number of control grooves 304. In this embodiment, one end of the movable rod 310 can be fitted with a ball bearing and slides against the drive block 309. Another end of the movable rod 310 extends into the corresponding control groove 304 and is connected to a component suitable for the control groove 304. The movable plate 311 is equipped with a diameter that matches the inner diameter of the control groove 304, and its height is less than the height of the control groove 304. The outer wall of the movable rod 310 is fitted with an elastic element (such as a spring) for contacting the drive block 309. One end of the elastic element is connected to the outer wall of the movable rod 310, and the other end is connected to the inner wall of the assembly cavity. When the drive block 309 moves, it pushes the movable rod 310 to drive the movable plate 311 to move within the control groove 304. This allows for adjustment of the volume of the control groove 304, thereby achieving control of the dosage of the reagent and avoiding waste caused by adding too much reagent or affecting the treatment effect on the water by adding too little reagent. Several sets of drive blocks 309 are connected by a connecting rod group 312. The connecting rod group 312 is used to independently control the corresponding drive block 309 to move horizontally along the axis of the control roller 303. Because the amount of medicine used in different placement cavities 302 is different, the user can control the amount of medicine used in different placement cavities 302 through the connecting rod group 312, so as to achieve precise and independent control of the dosage of each medicine.

[0025] Please see the appendix Figures 5-6 Preferably, the connecting rod assembly 312 in this embodiment includes several sets of rods 3121 sequentially sleeved together. One end of each set of rods 3121 is sequentially connected to several sets of drive blocks 309, i.e., the number of rods 3121 is the same as the number of drive blocks 309. The other end of each set of rods 3121 extends to the outside of the housing 301 and is rotatably sleeved with a connecting block. A bearing is provided at the connection between the connecting block and the rod 3121 so that the rod 3121 does not interfere with the connecting block when rotating with the control roller 303. The connecting block and the housing 301 are connected by a telescopic device 3122 (such as an electric telescopic rod) to facilitate... Figures 5-6As shown in the figure, there are three sets of drive blocks 309 and rods 3121. The three sets of rods 3121 are movably sleeved together from the inside to the outside, and the length of the three sets of rods 3121 decreases from the inside to the outside. The inner rod 3121 is connected to one end of the drive block 309 on the left, and then passes through the control roller 303, the other two drive blocks 309 and the housing 301. The middle rod 3121 is connected to one end of the middle drive block 309, and then passes through the control roller 303, the drive block 309 on the right and the housing 301. The outer rod 3121 is connected to one end of the drive block 309 on the right, and then passes through the control roller 303 and the housing 301. The telescopic device 3122 is also provided with three sets to control the movement of the three sets of rods 3121 respectively, so as to realize the independent control of the position of the three sets of drive blocks 309. It should be noted that in this embodiment, the distance between two adjacent sets of connecting blocks is greater than the length of the assembly cavity, so that the independent movement of each rod 3121 will not be interfered with by the connecting blocks on other rods 3121. The measuring roller 303, the drive block 309, and the housing 301 are all provided with openings for the connecting rod assembly 312. The vertical cross-section of the drive block 309 is an isosceles trapezoid, as shown in the attached figure. Figure 6 As shown, when the drive block 309 moves to the right, its inclined side can push the movable rod 310 to drive the movable plate 311 to move within the control groove 304 to adjust the volume of the control groove 304. Furthermore, when the drive block 309 moves to the right to the maximum distance, the movable plate 311 is located at the opening of the control groove 304, at which point the medicine in the placement cavity 302 cannot enter the control groove 304.

[0026] Please see the appendix Figures 5-6Preferably, in this embodiment, a plurality of control chambers 305 corresponding one-to-one with the placement chambers 302 are provided inside the housing 301 and located between the receiving cavity and the collecting cavity 308. That is, the number of control chambers 305 is the same as the number of placement cavities 302. The control chambers 305 are connected to the corresponding control grooves 304 through channels opened in the housing 301, so that the medicine in different placement cavities 302 enters the corresponding control chambers 305 in equal amounts through the corresponding control grooves 304. The control chambers 305 are provided with receiving seats 306 for receiving medicine. The vertical cross-section of the receiving seat 306 is arc-shaped. The inner wall of the control chambers 305 is provided with a detection sensor 30 for detecting the gravity of the receiving seat 306. 7. The detection sensor 307 is a pressure sensor, and its model is selected according to the actual situation, which will not be described in detail here. The bottom of the receiving seat 306 is connected to the collection chamber 308 through a pipeline. A solenoid valve is installed in the pipeline. The solenoid valve and the detection sensor 307 are electrically connected to the controller. When the detection sensor 307 detects that the gravity of the receiving seat 306 reaches the preset threshold, the operator can open the solenoid valve through the controller to discharge the medicine on the receiving seat 306 and let it enter the collection chamber 308. At the same time, the corresponding telescopic device 3122 can also be controlled to close the control groove 304 through the movable plate 311, so that the medicine in the corresponding placement cavity 302 can no longer enter the collection chamber 308.

[0027] Preferably, the telescopic device 3122 in this embodiment is electrically connected to the controller, and the detection sensor 307 includes a standard preset threshold and several preset control thresholds. The several preset control thresholds increase sequentially and are all less than the standard preset threshold. For example, assuming the standard preset threshold is N, and the standard preset thresholds are N-5, N-10, and N-15, then N>N-5>N-10>N-15. The controller is also configured to control the corresponding telescopic device 3122 to drive the rod 3121 to move the drive block 309 to the preset position when the detection sensor 307 detects that the gravity of the receiving seat 306 reaches the standard preset threshold, so that the movable plate 311 closes the control groove 304 and ensures that the agent will not enter the corresponding control cavity 305 during the subsequent rotation of the control roller 303. When the sensor 307 detects that the gravity of the receiving seat 306 has reached a preset control threshold, the corresponding telescopic device 3122 is controlled to drive the drive block 309 to move a preset distance, wherein the preset distance is positively correlated with the magnitude of the preset control threshold; for example, when the sensor 307 detects that the gravity of the receiving seat 306 has reached the preset control threshold N-5, the corresponding telescopic device 3122 is controlled to drive the drive block 309 to move 5 cm to initially reduce the volume of the control groove 304; when the sensor 307 detects that the gravity of the receiving seat 306 has reached the preset control threshold N-10, If the corresponding telescopic device 3122 is controlled to drive the drive block 309 to move 10 cm, further reducing the volume of the control groove 304; when the detection sensor 307 detects that the gravity of the receiving seat 306 reaches the preset control threshold N-15, the corresponding telescopic device 3122 is controlled to drive the drive block 309 to move 15 cm, further reducing the volume of the control groove 304. In this way, the volume of the control groove 304 can be gradually and accurately reduced according to the increase of weight during the metering process, adjusting the dosage of the medicine entering the control cavity 305, realizing a continuous and controllable fine adjustment function, improving the metering accuracy and avoiding excessive dosage of medicine.

[0028] Preferably, the processing chamber 105 in this embodiment is provided with three sets, and the three sets of processing chambers 105 are, in sequence, a reduction chamber, a transition chamber and an oxidation degradation chamber along the direction from the inlet 102 to the outlet 104. In the reduction chamber, the water body removes chlorine atoms and reduces toxicity through corresponding agents. Then, it enters the transition chamber where the redox environment is regulated by corresponding agents to degrade intermediate products and create suitable conditions for the oxidation degradation chamber. Finally, it enters the oxidation degradation chamber where organic matter is completely decomposed by corresponding agents, achieving gradient degradation treatment. Each of the processing chambers 105 is equipped with a sensor group 103 for collecting water quality data. The sensor group 103 is electrically connected to a controller, and the controller is connected to an external display device. Optionally, the sensor group 103 includes a water quality detection sensor. The above-mentioned sensors are all conventional electrical components in the art and will not be described in detail here. Water quality sensors and external display devices are used to enable operators to understand the water quality in each treatment chamber 105, so that operators can continue to add chemicals to the treatment chamber 105 or control the next water guiding mechanism 200 to pump water into the next treatment chamber 105 for treatment. Optionally, a filter screen is provided inside the water inlet 102 in this embodiment to perform preliminary filtration of the water entering the water inlet 102.

[0029] Optionally, each processing chamber 105 can be connected to a drain pipe (not shown in the figure) to periodically discharge dirt and other residues remaining in the processing chamber 105.

[0030] Example 3 Please see the appendix Figure 1 and Figure 7 Based on Example 2, in this example, the pumping pipe 202 and the draining pipe 203 in two adjacent sets of water guiding mechanisms 200 extend into the treatment chamber 105 and are connected to the mixing mechanism 400. The mixing mechanism 400 includes: The connecting seat 401 is located in the processing chamber 105. Inside it, an impeller body 402 is rotatably installed. A port is provided on one side. The impeller body 402 is driven to rotate by water drawn in by the pumping pipe 202 or water discharged by the drain pipe 203. When the water guiding mechanism 200 injects water into the treatment chamber 105, the water is discharged through the drain pipe 203 to the connecting seat 401. The impeller body 402 rotates under the impact force of the water flow as the water flows to the opening. When the water guiding mechanism 200 extracts water from the treatment chamber 105, the water enters the pumping pipe 202 through the opening. Similarly, the impeller body 402 rotates under the impact force of the water flow. A mixing rod 403 is mounted on a connecting seat 401, with one end connected to the shaft of the impeller body 402. The outer wall of the mixing rod 403 is provided with several sets of mixing blades. When the impeller body 402 rotates, it drives the mixing rod 403, which in turn drives the mixing blades to stir the water in the treatment chamber 105. This significantly improves the mixing efficiency and reaction rate of the water and the reagent, thereby enhancing the treatment effect and shortening the reaction time.

[0031] Preferably, in this embodiment, the mixing rod 403 located in the oxidation degradation chamber has a cavity. The outer wall of the mixing rod 403 has several sets of vent holes 404 communicating with the cavity. The top of the mixing rod 403 is rotatably connected to a pipeline, and one end of the pipeline is connected to the output end of the aeration device 500. The aeration device 500 is a conventional device in the art and will not be described in detail here. When the water is in the oxidation degradation chamber, the aeration device 500 continuously injects oxygen or air into the mixing rod 403. The gas diffuses into the water through the cavity from the vent holes 404. While achieving efficient aeration, the mixing rod 403 further enhances the gas-liquid mass transfer and pollutant oxidation degradation efficiency through its stirring action.

[0032] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A gradient degradation treatment device for chlorinated hydrocarbon pollutants in groundwater, characterized in that, include: The permeation reaction wall (100) includes a wall (101), with an inlet (102) and an outlet (104) respectively opened on both sides of the wall (101), and a plurality of treatment chambers (105) are opened in the wall (101) and located between the inlet (102) and the outlet (104); Several sets of water guiding mechanisms (200) are provided, each including a pump body (201) and a pumping pipe (202) and a drain pipe (203) respectively located at the input end and the output end of the pump body (201); the pumping pipe (202) and the drain pipe (203) in two adjacent sets of water guiding mechanisms (200) extend into a processing chamber (105), the pumping pipe (202) in the first water guiding mechanism (200) extends into the inlet (102), and the drain pipe (203) in the last water guiding mechanism (200) extends into the outlet (104); Several sets of agent supply mechanisms (300) correspond one-to-one with several sets of treatment chambers (105), and the output end of the agent supply mechanism (300) is connected to the drain pipe (203) extending from the water guiding mechanism (200) into the treatment chamber (105) for supplying agents into the drain pipe (203). The drug supply mechanism (300) includes a housing (301), several sets of placement cavities (302) opened within the housing (301) for storing drugs, a receiving cavity opened within the housing (301) and located below the placement cavities (302), a control roller (303) rotatably disposed in the receiving cavity, and a collection cavity (308) opened within the housing (301) and located below the receiving cavity. The outer circumference of the control roller (303) corresponds to the placement cavity ( Several sets of measuring grooves (304) are provided at each position of 302. An inlet for adding medicine to the measuring groove (304) is provided between the receiving cavity and the placing cavity (302). An outlet for discharging medicine in the measuring groove (304) is provided between the receiving cavity and the collecting cavity (308). The collecting cavity (308) is connected to the drain pipe (203) through a pipeline. The placing cavity (302) is connected to a feeding port that penetrates the shell (301). The control roller (303) has several sets of assembly cavities that correspond one-to-one with the placement cavity (302) along its axis. A drive block (309) is movably arranged in the assembly cavity. The outer wall of the drive block (309) is slidably abutted against the position of the control groove (304) with a movable rod (310). One end of the movable rod (310) extends into the corresponding control groove (304) and is connected to a movable plate (311) adapted to the control groove (304). The outer wall of the movable rod (310) is fitted with an elastic element for contacting the drive block (309). When the drive block (309) moves, it pushes the movable rod (310) to drive the movable plate (311) to move in the control groove (304). Several sets of drive blocks (309) are connected by a connecting rod group (312). The connecting rod group (312) is used to independently control the horizontal movement of the corresponding drive block (309) along the axis of the control roller (303). The connecting rod assembly (312) includes several sets of rods (3121) that are sequentially nested together. One end of each set of rods (3121) is sequentially connected to several sets of drive blocks (309). The other end of each set of rods (3121) extends to the outside of the housing (301) and is rotatably fitted with a connecting block. The connecting block and the housing (301) are connected by a telescopic device (3122). The distance between two adjacent sets of connecting blocks is greater than the length of the assembly cavity. The measuring roller (303), the drive block (309), and the housing (301) are all provided with openings for the connecting rod assembly (312) to pass through. The vertical cross-section of the drive block (309) is an isosceles trapezoid. Several sets of control chambers (305) corresponding to the placement chamber (302) are provided in the housing (301) and located between the receiving chamber and the collection chamber (308). The control chambers (305) are connected to the corresponding control grooves (304) through channels opened in the housing (301). The control chambers (305) are provided with receiving seats (306) for receiving medicine. The inner wall of the control chambers (305) is provided with detection sensors (307) for detecting the gravity of the receiving seats (306). The bottom of the receiving seats (306) is connected to the collection chamber (308) through a pipeline. The pipeline is provided with a solenoid valve. The solenoid valve and the detection sensor (307) are electrically connected to the controller. The telescopic device (3122) is electrically connected to the controller. The detection sensor (307) includes a standard preset threshold and several preset control thresholds, which are sequentially increased and all less than the standard preset threshold. The controller is also configured to control the corresponding telescopic device (3122) to drive the rod (3121) to move the drive block (309) to a preset position when the detection sensor (307) detects that the weight of the receiving seat (306) reaches the standard preset threshold, so that the movable plate (311) closes the control groove (304). The controller is also configured to control the corresponding telescopic device (3122) to drive the drive block (309) to move a preset distance when the detection sensor (307) detects that the weight of the receiving seat (306) reaches the preset control threshold. The preset distance is positively correlated with the size of the preset control threshold.

2. The gradient degradation treatment device according to claim 1, characterized in that, The shaft of the control roller (303) passes through the side wall of the housing (301) and is provided with an impeller drive component (313). The impeller drive component (313) includes a follower impeller located in the pumping pipe (202). The follower impeller is driven to rotate by the water flowing in the pumping pipe (202). The shaft of the follower impeller is connected to the shaft of the control roller (303) through a worm gear assembly.

3. The gradient degradation treatment device according to claim 1, characterized in that, The processing chamber (105) is provided in three sets, and the three sets of processing chambers (105) are, in sequence, a reduction chamber, a transition chamber and an oxidation degradation chamber along the direction from the inlet (102) to the outlet (104); Each of the processing chambers (105) is equipped with a sensor group (103) for collecting water quality data. The sensor group (103) is electrically connected to a controller, which is connected to an external display device.

4. The gradient degradation treatment device according to claim 3, characterized in that, The pumping pipe (202) and drain pipe (203) in two adjacent sets of water guiding mechanisms (200) both extend into the treatment chamber (105) and are connected to a mixing mechanism (400), the mixing mechanism (400) including: The connecting seat (401) is located in the processing chamber (105), and an impeller body (402) is rotatably provided inside it. A port is provided on one side of the impeller body (402). The impeller body (402) is driven to rotate by water drawn in by the water pumping pipe (202) or water discharged by the drain pipe (203). A mixing rod (403) is provided on a connecting seat (401), one end of which is connected to the shaft of the impeller body (402). The outer wall of the mixing rod (403) is provided with several sets of mixing blades.

5. The gradient degradation treatment device according to claim 4, characterized in that, The mixing rod (403) located in the oxidation degradation chamber has a cavity. The outer wall of the mixing rod (403) has a number of ventilation holes (404) that communicate with the cavity. The top of the mixing rod (403) is rotatably connected to a pipeline, and one end of the pipeline is connected to the output end of the aeration device (500).

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