A device and method for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons

Abstract

The invention discloses a device and method for chemically oxidizing and repairing groundwater polluted by chlorinated hydrocarbons, comprising a pipeline conveying mechanism and a chemical oxidizing and repairing mechanism arranged on the pipeline conveying mechanism; the pipeline conveying mechanism comprises an initial lifting mechanism, a repair circulation mechanism and a reflux mechanism which are connected in sequence; the repair circulation mechanism comprises a swirl control pipe, a vacuum control pipe, a chemical agent slow-release dosing pipe, an accelerating agent dosing pipe and an auxiliary driving circulation pipe which are connected in sequence; the initial lifting mechanism comprises an initial lifting conveying pipe, one end of which is placed in an upstream section in a groundwater body, and the other end of which is connected to a swirl control pipe; the device has good controllability of oxidation reaction, can accurately control the dosage of oxidant according to factors such as the concentration of chlorinated hydrocarbons in groundwater and the groundwater flow rate, and can efficiently repair groundwater polluted by chlorinated hydrocarbons.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a device and a method for chemically oxidizing and repairing groundwater polluted by chlorinated hydrocarbons. Background Art

[0002] Chlorinated hydrocarbon contamination of groundwater is a serious environmental problem. The sources of pollution include industrial emissions, landfills, agricultural activities, etc. Many industrial production processes produce chlorinated hydrocarbons and discharge them into the environment. For example, chemical, pharmaceutical, electronic and other industries may use chlorinated hydrocarbons as solvents, cleaning agents or raw materials in the production process. If these enterprises do not take effective sewage treatment measures, wastewater containing chlorinated hydrocarbons may leak into the soil and then contaminate groundwater;

[0003] Chlorinated hydrocarbons have strong chemical stability and are difficult to degrade in the natural environment. Once they enter the groundwater system, they can exist in the groundwater for a long time and continue to pollute the groundwater;

[0004] Existing technologies have certain limitations in the remediation of groundwater contaminated by chlorinated hydrocarbons. The remediation process is relatively complex, time-consuming and labor-intensive, and the remediation measures need to be further improved and optimized. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for chemical oxidation repair of chlorinated hydrocarbon contaminated groundwater, which can specifically add chemical agents into the chlorinated hydrocarbon contaminated groundwater to purify and repair the contaminated groundwater.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for chemically oxidizing and repairing groundwater contaminated by chlorinated hydrocarbons, comprising a pipeline conveying mechanism, and a chemical oxidizing and repairing mechanism arranged on the pipeline conveying mechanism;

[0008] The pipeline conveying mechanism includes an initial lifting mechanism, a repair circulation mechanism and a return flow mechanism which are connected in sequence;

[0009] The repair circulation mechanism includes a swirl control tube, a vacuum control tube, a chemical agent slow-release dosing tube, an accelerating agent dosing tube and an auxiliary drive circulation tube which are sequentially connected;

[0010] The initial lifting mechanism includes an initial lifting delivery pipe, one end of which is placed in the upstream section of the groundwater body, and the other end of which is connected to the swirl control pipe;

[0011] The reflux mechanism comprises a reflux delivery pipe connected to the auxiliary drive flow pipe, and the other end of the reflux delivery pipe is placed in a downstream section in the groundwater body;

[0012] The chemical oxidation repair mechanism includes a plurality of chemical oxidation repair units arranged outside the chemical agent slow-release dosing tube;

[0013] The chemical oxidation repair unit includes a plurality of agent delivery and containing tubes fixed on the outside of the chemical agent slow-release feeding tube, the agent delivery and containing tubes are arranged along the radial extension of the chemical agent slow-release feeding tube and are connected with the inside of the chemical agent slow-release feeding tube;

[0014] A sponge limit baffle is fixed in the medicine delivery and containing tube, a sponge clamping circular plate is slidably connected in the medicine delivery and containing tube, and a medicine adsorption sponge is clamped and constrained between the sponge limit baffle and the sponge clamping circular plate;

[0015] The position of the medicine adsorption sponge in the medicine delivery and containing tube forms a medicine adsorption chamber;

[0016] A plurality of medicine input tubes connected with the medicine adsorption chamber are fixed on the outside of the medicine delivery and containing tube.

[0017] Preferably, an input end lifting mechanism is provided at one end of the initial lifting delivery pipe placed in the groundwater body, the input end lifting mechanism comprises an input lifting fixed pipe fixed to the lower end of the initial lifting delivery pipe, the input lifting fixed pipe is connected to an input lifting movable pipe via an input telescopic bellows, and an initial input liquid level meter extending vertically is fixed to the outer side of the input lifting movable pipe;

[0018] A lifting drive fixed cylinder with an opening facing downward is fixed on the outside of the input lifting fixed tube, a lifting drive sliding cylinder with an opening facing upward is slidably connected inside the lifting drive fixed cylinder, and the lower end of the lifting drive sliding cylinder is fixedly connected to the input lifting movable tube;

[0019] A lifting drive telescopic rod for driving the lifting drive sliding cylinder to move is arranged in the lifting drive fixed cylinder;

[0020] An input filter shell connected to the input lifting movable tube is fixed at the lower end thereof, and the input filter shell is a porous hollow structure with the inside and outside communicating.

[0021] Description: In the input end lifting mechanism, the inner rod of the lifting drive telescopic rod extends or retracts to drive the input lifting moving tube to move down or up through the lifting drive sliding cylinder. According to the measurement result of the initial input liquid level meter, the height position of the input lifting moving tube is controlled so that the lower end of the input lifting moving tube is immersed at a depth of 20 cm from the groundwater surface.

[0022] Preferably, an input cleaning support ring is fixed on the top of the input filter housing, an input cleaning rotating ring is rotatably connected to the outside of the input cleaning support ring, a vertically penetrating cleaning shaft connecting hole is provided on the input cleaning rotating ring, a vertically extending cleaning rotating shaft is rotatably connected in the cleaning shaft connecting hole, and a cleaning brush is provided on the cleaning rotating shaft;

[0023] A self-rotating matching gear ring is fixed on the outer side of the input cleaning support ring, a self-rotating driving gear is fixed on the cleaning shaft, and the self-rotating driving gear is meshed and connected with the self-rotating matching gear ring.

[0024] Description: The input filter shell can filter the groundwater. The input filter shell is cleaned once every hour. Each cleaning shaft can rotate around its own axis while revolving with the input cleaning rotating ring. Under the rotation, the cleaning brush is used to clean the dirt attached to the outside of the input filter shell.

[0025] A return end lifting mechanism is provided at one end of the return delivery pipe placed in the groundwater body. The return end lifting mechanism includes a return lifting fixed pipe fixed to the lower end of the return delivery pipe. The return lifting fixed pipe is connected to a return lifting movable pipe through a return telescopic bellows.

[0026] A vertically extending reflux monitoring level gauge is fixed on the outside of the reflux lifting and moving pipe, and the reflux monitoring level gauge is a photoelectric level gauge of the prior art;

[0027] A reflux lifting fixed cylinder with an opening facing downward is fixed on the outside of the reflux lifting fixed tube, a reflux lifting sliding cylinder with an opening facing upward is slidably connected inside the reflux lifting fixed cylinder, and the lower end of the reflux lifting sliding cylinder is fixedly connected to the reflux lifting movable tube;

[0028] A reflux lifting telescopic rod is provided in the reflux lifting fixed cylinder for driving the reflux lifting sliding cylinder to move. The reflux lifting telescopic rod is an electrically controlled telescopic rod in the prior art. The outer rod end of the reflux lifting telescopic rod is fixedly connected to the top of the reflux lifting fixed cylinder, and the inner rod end of the reflux lifting telescopic rod is fixedly connected to the bottom of the reflux lifting sliding cylinder.

[0029] Description: In the reflux end lifting mechanism, the inner rod of the reflux lifting telescopic rod extends or retracts to drive the reflux lifting moving tube to move down or up through the reflux lifting sliding cylinder. According to the measurement result of the reflux monitoring level meter, the height position of the reflux lifting moving tube is controlled so that the lower end of the reflux lifting moving tube is immersed at a depth of 20 cm from the groundwater surface.

[0030] Preferably, an adsorption and extrusion mechanism is provided in the medicine delivery and storage tube, and the adsorption and extrusion mechanism comprises an adsorption and extrusion fixed cylinder fixed on the inner side wall of the medicine delivery and storage tube and having one end open, an adsorption and extrusion sliding cylinder is slidably connected in the adsorption and extrusion fixed cylinder, and the outer end of the adsorption and extrusion sliding cylinder is fixedly connected to the sponge clamping circular plate;

[0031] An adsorption and extrusion telescopic rod for driving the adsorption and extrusion sliding cylinder to move is arranged in the adsorption and extrusion fixed cylinder.

[0032] Description: The adsorption and squeezing mechanism is used to change the adsorption performance of the drug adsorption sponge, thereby adjusting the release rate of the chemical agent on the drug adsorption sponge.

[0033] Preferably, an impact release mechanism is provided on the medicine delivery containing tube, and the impact release mechanism includes an impact release driving piston slidably connected in the medicine delivery containing tube, an impact drive containing shell is fixed to the end of the medicine delivery containing tube away from the chemical agent sustained-release feeding tube, an impact drive connecting rod is fixed to the end of the impact release driving piston away from the chemical agent sustained-release feeding tube, the impact drive connecting rod extends to the interior of the impact drive containing shell, and an impact drive telescopic rod for driving the impact release driving piston to move is provided in the impact drive containing shell.

[0034] Description: The impact release mechanism can be used to quickly release the chemical agent on the agent adsorption sponge into the groundwater.

[0035] Preferably, a swirl control mechanism is provided on the swirl control tube, the swirl control mechanism comprises a plurality of swirl guide plates rotatably connected to the inner side of the swirl control tube, a swirl shaft connection hole is provided on the side wall of the swirl control tube and penetrates in the radial direction thereof, a guide plate shaft is rotatably connected in the swirl shaft connection hole, and the plurality of swirl guide plates are fixedly connected to the inner ends of the guide plate shafts one by one;

[0036] A swirl regulating control ring is rotatably connected to the outside of the swirl control tube, and the outside of the swirl regulating control ring has multiple swirl deflection constraint grooves extending in parallel to the axial direction of the swirl control tube. A swirl deflection driving connecting rod is fixed to the outer end of the guide plate shaft, and a swirl deflection constraint sliding column is fixed on the swirl deflection driving connecting rod. Multiple swirl deflection constraint sliding columns are slidably connected to each swirl deflection constraint sliding groove one by one.

[0037] Description: The cyclone control mechanism is used to make the groundwater produce cyclone motion in the cyclone control tube, vacuum control tube and chemical agent slow-release dosing tube. The groundwater in the cyclone motion state can make the chemical agent and the groundwater disperse and mix more quickly and evenly.

[0038] Preferably, a vacuum control mechanism is provided on the vacuum control tube, and the vacuum control mechanism includes a vacuum liquid level monitoring tube fixed on the upper side of the vacuum control tube and connected thereto and extending vertically, and a vacuum buffer box is connected to the upper end of the vacuum liquid level monitoring tube, and the vacuum buffer box is connected to a vacuum pump through a pipeline;

[0039] A vacuum monitoring liquid level gauge is fixed on the inner wall of the vacuum liquid level monitoring tube;

[0040] The upper end of the vacuum liquid level monitoring tube is connected with the vacuum buffer box through a vacuum control short tube, and a vacuum control valve is arranged on the vacuum control short tube.

[0041] Description: Use the vacuum control mechanism to evacuate the pipes of the repair circulation mechanism and introduce groundwater into the pipes of the repair circulation mechanism.

[0042] Preferably, a medicine-assisted accelerated dosing mechanism is provided in the accelerated dosing pipe, and the medicine-assisted accelerated dosing mechanism comprises an annular and hollow accelerated dosing input ring shell fixed to the inner side of the accelerated dosing pipe, and a plurality of accelerated dosing nozzles connected to the inner side of the accelerated dosing input ring shell are fixed to the inner side of the accelerated dosing input ring shell;

[0043] A cross-section constraint shaft extending along the axis of the accelerating agent dosing pipe is fixed in the pipe, and both ends of the cross-section constraint shaft are streamlined structures.

[0044] Description: The chemical agent-assisted accelerated dosing mechanism is used to assist in releasing chemical agents into groundwater. When groundwater flows through the accelerated agent dosing pipe, the flow cross-section of the groundwater becomes smaller due to the existence of the cross-sectional constraint axis, forcing the groundwater flow rate to increase. The larger flow rate can better mix the groundwater and the chemical agent.

[0045] Preferably, the auxiliary drive circulation pipe is provided with an auxiliary circulation drive mechanism, the auxiliary circulation drive mechanism comprises an auxiliary drive accommodating shell fixed in the auxiliary drive circulation pipe, the auxiliary drive accommodating shell is rotatably connected with a blade shaft extending along the axis of the auxiliary drive circulation pipe, and an auxiliary drive propeller is fixed at the outer end of the blade shaft;

[0046] A driven bevel gear is fixed to one end of the blade shaft in the auxiliary drive housing, a vertically extending auxiliary drive shaft is rotatably connected to the auxiliary drive housing, a driving bevel gear is fixed to one end of the auxiliary drive shaft in the auxiliary drive housing, and the driving bevel gear is meshed and connected with the driven bevel gear;

[0047] The auxiliary driving shaft extends to the outside of the auxiliary driving circulation pipe, and a windmill of the prior art is fixed on the ground, and the rotating shaft of the windmill is connected with the auxiliary driving shaft in a transmission manner.

[0048] Description: The circulation auxiliary drive mechanism assists in driving the circulation of groundwater in each pipe. Under the drive of natural wind, the windmill of the prior art drives the blade shaft to rotate, and the blade shaft drives the auxiliary drive propeller to rotate, driving the groundwater flowing through the auxiliary drive circulation pipe, making the groundwater flow more smoothly.

[0049] Preferably, a method for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons, based on the above-mentioned device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons, comprises the following steps:

[0050] S1. Equipment installation:

[0051] Two vertically extending repair wells connected to the groundwater body are drilled at a distance of 100m along the groundwater flow direction, and a 3m deep equipment accommodation pit is dug between the two repair wells;

[0052] The initial lifting and conveying pipe is fixedly placed in the repair well at the upstream end, and the lower end of the initial lifting and conveying pipe is immersed in the groundwater body;

[0053] The return flow conveying pipe is fixedly placed in the repair well at the downstream end, and the lower end of the return flow conveying pipe is immersed in the groundwater body;

[0054] Install the entire repair circulation mechanism in the equipment receiving pit, connect and fix the initial lifting conveying pipe with the swirl control pipe, and connect and fix the return conveying pipe with the auxiliary drive circulation pipe;

[0055] S2. Groundwater drainage:

[0056] Vacuuming each pipeline of the repair circulation mechanism, and introducing groundwater into each pipeline of the repair circulation mechanism under the action of negative pressure;

[0057] The initial lifting and conveying pipe and the return flow conveying pipe, as well as the swirl control pipes, the vacuum control pipes, the chemical agent slow-release dosing pipes, the accelerating agent dosing pipes, and the auxiliary drive circulation pipes form an inverted U-shaped communicating vessel structure, and there is a liquid level difference between the downstream end and the upstream end of the groundwater body. Under the action of gravity, the groundwater body can flow naturally in the initial lifting and conveying pipe and the return flow conveying pipe, as well as the swirl control pipes, the vacuum control pipes, the chemical agent slow-release dosing pipes, the accelerating agent dosing pipes, and the auxiliary drive circulation pipes;

[0058] S3. Release of chemical agents:

[0059] When the groundwater flows through the chemical agent slow-release dosing pipe, the chemical agent is transported to each agent input pipe, and the chemical agent in the agent input pipe is transported to the agent adsorption chamber, and the chemical agent is adsorbed on the agent adsorption sponge;

[0060] Since the sponge limit baffle is a porous hollow structure with two sides penetrating, the groundwater can contact the chemical adsorption sponge when flowing through the chemical agent slow-release dosing pipe, and the chemical agent on the chemical adsorption sponge can naturally diffuse into the groundwater;

[0061] S4. Regulate the flow characteristics of groundwater:

[0062] The cyclone control mechanism is used to make the groundwater body produce cyclone motion in the cyclone control pipe, the vacuum control pipe and the chemical agent slow-release dosing pipe;

[0063] The servo motor (existing technology) fixed on the outside of the swirl control tube drives the swirl adjustment control to rotate around the axis of the swirl control tube through gear transmission. Under the mutual constraints of the swirl deflection constraint slide groove and the swirl deflection constraint slide column, the swirl adjustment control ring drives the guide plate shaft to rotate through the swirl deflection driving connecting rod, and the guide plate shaft then drives the swirl guide plate to deflect. When the groundwater flows through the swirl control tube, under the diversion effect of the swirl guide plate, the groundwater generates a swirl motion rotating around the axis of the swirl control tube during the circulation process, and the groundwater is still in a swirl motion when flowing through the vacuum control tube and the chemical agent slow-release dosing tube;

[0064] The groundwater in a swirling motion state can disperse and mix the chemical agent with the groundwater more quickly and evenly;

[0065] S5. Assisted release of chemicals into groundwater:

[0066] Using a reagent-assisted accelerated dosing mechanism to assist in releasing chemical reagents into groundwater;

[0067] The chemical agent is transported into the accelerated dosing input ring shell, and the chemical agent in the accelerated dosing input ring shell is discharged through each accelerated dosing nozzle to mix the chemical agent with the groundwater;

[0068] When groundwater flows through the accelerating agent dosing pipe, the flow cross-section of the groundwater becomes smaller due to the existence of the cross-sectional constraint axis, forcing the groundwater flow velocity to increase. The larger flow velocity can better mix the groundwater and the chemical agent.

[0069] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0070] 1. The present invention has a reasonable structural design, good controllability of the oxidation reaction, and can accurately control the dosage of the oxidant. Excessive oxidant may cause the deterioration of groundwater quality and produce too many by-products, while too little oxidant cannot effectively remove pollutants. The equipment can accurately control the dosage of the oxidant according to factors such as the concentration of chlorinated hydrocarbons in groundwater and groundwater flow;

[0071] 2. The present invention is easy to operate and has good mass transfer performance, which can ensure that the oxidant is fully mixed with the groundwater, so that the oxidant is evenly dispersed in the groundwater, improves the mass transfer efficiency, and thus enhances the effect of the oxidation reaction;

[0072] 3. The equipment of the present invention is easy to install and maintain, and has a relatively simple and compact structure, which is convenient for installation in different groundwater pollution sites. Each component is easy to assemble and disassemble, which is convenient for installation in narrow wells and subsequent maintenance;

[0073] 4. The input end lifting mechanism and the return end lifting mechanism are used in the device of the present invention to ensure that the input end and the output end of the device as a whole are always immersed in the groundwater body at a depth of about 20 cm, so as to prevent air from leaking into the conveying pipeline and causing the water flow to be unable to circulate normally;

[0074] 5. In the device of the present invention, the adsorption performance of the agent adsorption sponge can be changed according to actual needs by using the adsorption extrusion mechanism, thereby adjusting the release rate of the chemical agent on the agent adsorption sponge. The impact release mechanism can also be used to quickly release the chemical agent on the agent adsorption sponge into the groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 It is a front view of the device of the present invention;

[0076] Figure 2 It is a structural schematic diagram of the input end lifting mechanism of the present invention;

[0077] Figure 3 It is a structural schematic diagram of the return end lifting mechanism of the present invention;

[0078] Figure 4 It is a schematic structural diagram of the chemical oxidation repair unit of the present invention;

[0079] Figure 5 It is a structural schematic diagram of the swirl control mechanism of the present invention;

[0080] Figure 6 It is a structural schematic diagram of the vacuum control mechanism of the present invention;

[0081] Figure 7 It is a structural schematic diagram of the pharmaceutical auxiliary accelerated dosing mechanism of the present invention;

[0082] Figure 8 It is a structural schematic diagram of the circulation auxiliary driving mechanism of the present invention.

[0083] In the figure, 10-pipeline conveying mechanism, 100-groundwater body, 11-initial lifting mechanism, 110-initial lifting conveying pipe, 12-repair circulation mechanism, 121-swirl control pipe, 122-vacuum control pipe, 123-chemical agent slow-release dosing pipe, 124-accelerated agent dosing pipe, 125-auxiliary drive circulation pipe, 13-backflow mechanism, 130-backflow conveying pipe, 14-input end lifting mechanism, 141-input lifting fixed pipe, 142-input telescopic bellows, 143-input lifting moving pipe, 144-lifting drive fixed cylinder, 145-lifting drive sliding cylinder, 146-lifting drive telescopic rod, 147-initial transmission Inlet level gauge, 151-input cleaning support ring, 152-input cleaning rotating ring, 1520-cleaning shaft connecting hole, 153-cleaning rotating shaft, 154-cleaning brush, 155-self-rotating matching gear ring, 156-self-rotating driving gear, 16-return end lifting mechanism, 161-return lifting fixed pipe, 162-return telescopic bellows, 163-return lifting moving pipe, 164-return lifting fixed cylinder, 165-return lifting sliding cylinder, 166-return lifting telescopic rod, 167-return monitoring level gauge, 20-chemical oxidation repair mechanism, 21-chemical oxidation repair unit, 210-agent adsorption sponge, 211-agent delivery and storage Tube, 212-sponge limit baffle, 213-sponge clamping circular plate, 214-medicine input tube, 22-adsorption extrusion mechanism, 221-adsorption extrusion fixed cylinder, 222-adsorption extrusion sliding cylinder, 223-adsorption extrusion telescopic rod, 23-impact release mechanism, 230-impact drive accommodating shell, 231-impact release drive piston, 232-impact drive connecting rod, 233-impact drive telescopic rod, 31-swirl control mechanism, 310-swirl guide plate, 3101-swirl shaft connecting hole, 311-guide plate shaft, 312-swirl adjustment control ring, 3120-swirl deflection constraint slide groove, 313-swirl deflection drive connecting rod, 3130-swirl deflection constraint sliding column, 32-vacuum control mechanism, 320-vacuum monitoring liquid level gauge, 321-vacuum liquid level monitoring tube, 322-vacuum buffer box, 323-vacuum pump, 324-vacuum control short tube, 3240-vacuum control valve, 33-medicine auxiliary accelerated dosing mechanism, 331-accelerated dosing input ring shell, 332-accelerated dosing nozzle, 330-section constraint shaft, 34-circulation auxiliary drive mechanism, 340-auxiliary drive propeller, 341-auxiliary drive containing shell, 342-blade rotating shaft, 3420-driven bevel gear, 343-auxiliary drive shaft, 3430-active bevel gear, 345-windmill. DETAILED DESCRIPTION

[0084] Combine the following Figure 1-Figure 8The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of the respective main views or structural schematic diagrams themselves.

[0085] Example 1: A device for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons, such as Figure 1 As shown, it includes a pipeline conveying mechanism 10 and a chemical oxidation repair mechanism 20 arranged on the pipeline conveying mechanism 10;

[0086] The pipeline conveying mechanism 10 includes an initial lifting mechanism 11, a repair circulation mechanism 12 and a return flow mechanism 13 which are connected in sequence;

[0087] The repair circulation mechanism 12 includes a swirl control tube 121, a vacuum control tube 122, a chemical agent slow-release dosing tube 123, an accelerating agent dosing tube 124 and an auxiliary drive circulation tube 125 which are sequentially connected.

[0088] The initial lifting mechanism 11 includes an initial lifting delivery pipe 110, one end of which is placed in the upstream section of the groundwater body 100, and the other end of the initial lifting delivery pipe 110 is connected to the swirl control pipe 121;

[0089] The reflux mechanism 13 includes a reflux delivery pipe 130 connected to the auxiliary drive flow pipe 125, and the other end of the reflux delivery pipe 130 is placed in the downstream section of the groundwater body 100;

[0090] The return flow delivery pipe 130 is located at one end of the groundwater body 100 and is fixedly provided with an organic pollutant concentration sensor, an oxidant residual sensor, an ion sensor, a pH sensor and a dissolved oxygen DO sensor (not shown in the figure) in the prior art;

[0091] Organic pollutant concentration sensors include gas chromatography GC sensors and total organic carbon TOC sensors;

[0092] Oxidant residual sensors include hydrogen peroxide sensors and potassium permanganate sensors;

[0093] Ion sensors include chloride ion sensors and metal ion sensors;

[0094] like Figure 1 As shown, the chemical oxidation repair mechanism 20 includes a plurality of chemical oxidation repair units 21 arranged outside the chemical agent slow-release dosing pipe 123;

[0095] The chemical oxidation repair unit 21 includes a plurality of agent delivery and storage tubes 211 fixed to the outside of the chemical agent slow-release dosing tube 123. The agent delivery and storage tubes 211 are arranged along the radial extension of the chemical agent slow-release dosing tube 123 and are connected to the inside of the chemical agent slow-release dosing tube 123.

[0096] A sponge limiting baffle 212 is fixed in the medicine delivery and containing tube 211, a sponge clamping circular plate 213 is slidably connected in the medicine delivery and containing tube 211, and a medicine adsorption sponge 210 is clamped and constrained between the sponge limiting baffle 212 and the sponge clamping circular plate 213;

[0097] The sponge clamping circular plate 213 of the sponge limiting baffle 212 is a porous hollow structure with two sides penetrated;

[0098] The position of the medicine adsorption sponge 210 in the medicine delivery and containing tube 211 forms a medicine adsorption chamber;

[0099] A plurality of drug input tubes 214 connected to the drug adsorption chamber are fixed to the outside of the drug delivery and storage tube 211;

[0100] The reagent input pipe 214 is connected to the output end of a prior art liquid delivery pump (not shown in the figure) through a pipeline, and the liquid delivery pump (not shown in the figure) is used to deliver the chemical reagent into the reagent adsorption chamber.

[0101] like Figure 5 As shown, a swirl control mechanism 31 is provided on the swirl control tube 121, and the swirl control mechanism 31 includes a plurality of swirl guide plates 310 rotatably connected to the inner side of the swirl control tube 121, and a swirl shaft connecting hole 3101 is provided on the side wall of the swirl control tube 121 and penetrates along the radial direction thereof, and a guide plate shaft 311 is rotatably connected in the swirl shaft connecting hole 3101, and the plurality of swirl guide plates 310 are fixedly connected to the inner ends of the guide plate shafts 311 one by one;

[0102] The outer side of the swirl control tube 121 is rotatably connected with a swirl regulating control ring 312, and the outer side of the swirl regulating control ring 312 has a plurality of swirl deflection constraint slide grooves 3120 extending in parallel with the axial direction of the swirl control tube 121. A swirl deflection driving connecting rod 313 is fixed to the outer end of the guide plate shaft 311, and a swirl deflection constraint sliding column 3130 is fixed to the swirl deflection driving connecting rod 313. The plurality of swirl deflection constraint sliding columns 3130 are slidably connected in each swirl deflection constraint slide groove 3120 in a one-to-one corresponding manner.

[0103] The swirl regulating control ring 312 is driven by a prior art servo motor (not shown in the figure) fixed to the outside of the swirl control tube 121 through gear transmission to rotate around the axis of the swirl control tube 121;

[0104] like Figure 7As shown, a medicine-assisted accelerated dosing mechanism 33 is provided in the accelerated dosing pipe 124, and the medicine-assisted accelerated dosing mechanism 33 includes a ring-shaped and hollow accelerated dosing input ring shell 331 fixed to the inner side of the accelerated dosing pipe 124, and a plurality of accelerated dosing nozzles 332 connected to the inner side of the accelerated dosing input ring shell 331 are fixed to the inner side of the accelerated dosing input ring shell 331;

[0105] A cross-section constraint shaft 330 extending along the axis of the accelerating agent dosing pipe 124 is fixed inside the accelerating agent dosing pipe 124, and both ends of the cross-section constraint shaft 330 are streamlined structures;

[0106] The accelerated dosing input annular shell 331 is connected to a prior art liquid delivery pump (not shown in the figure) through a pipeline, and the liquid delivery pump (not shown in the figure) is used to deliver the chemical agent to the interior of the accelerated dosing input annular shell 331.

[0107] Example 2: This example describes a method for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons. The method is based on a device for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons in Example 1, and comprises the following steps:

[0108] S1. Equipment installation:

[0109] Two vertically extending repair wells connected to the groundwater body 100 m apart are drilled along the groundwater flow direction, and a 3 m deep equipment accommodation pit is dug between the two repair wells;

[0110] The initial lifting and conveying pipe 110 is fixedly placed in the repair well at the upstream end, and the lower end of the initial lifting and conveying pipe 110 is immersed in the groundwater body 100;

[0111] The return flow delivery pipe 130 is fixedly placed in the repair well at the downstream end, and the lower end of the return flow delivery pipe 130 is immersed in the groundwater body 100;

[0112] The entire repair circulation mechanism 12 is installed in the equipment receiving pit, the initial lifting conveying pipe 110 is connected and fixedly installed with the swirl control pipe 121, and the return conveying pipe 130 is connected and fixedly installed with the auxiliary driving circulation pipe 125;

[0113] S2. Groundwater drainage:

[0114] First, the pipelines of the repair circulation mechanism 12 are evacuated, and groundwater is introduced into the pipelines of the repair circulation mechanism 12 under the action of negative pressure;

[0115] The initial lifting and conveying pipe 110 and the return flow conveying pipe 130 as well as the swirl control pipes 121, the vacuum control pipe 122, the chemical agent slow-release dosing pipe 123, the accelerating agent dosing pipe 124, and the auxiliary drive circulation pipe 125 form an inverted U-shaped communicating vessel structure, and there is a liquid level difference between the downstream end and the upstream end of the groundwater body 100. Under the action of gravity, the groundwater body 100 can flow naturally in the initial lifting and conveying pipe 110 and the return flow conveying pipe 130 as well as the swirl control pipes 121, the vacuum control pipe 122, the chemical agent slow-release dosing pipe 123, the accelerating agent dosing pipe 124, and the auxiliary drive circulation pipe 125;

[0116] S3. Release of chemical agents:

[0117] When the groundwater body 100 flows through the chemical agent slow-release dosing pipe 123, the chemical agent (the chemical agent in this embodiment can use the chemical agent used for the remediation of chlorinated hydrocarbon pollution in the prior art, and the present application does not make any special limitation on the chemical agent) is transported to each agent input pipe 214, and the chemical agent in the agent input pipe 214 is transported to the agent adsorption chamber, and the chemical agent is adsorbed on the agent adsorption sponge 210;

[0118] Since the sponge limit baffle 212 is a porous hollow structure with two sides through, the groundwater body 100 can contact the agent adsorption sponge 210 when flowing through the chemical agent slow-release dosing pipe 123, and the chemical agent on the agent adsorption sponge 210 can naturally diffuse into the groundwater body 100;

[0119] S4. Regulate the flow characteristics of groundwater:

[0120] The cyclone control mechanism 31 is used to make the underground water body 100 generate cyclone motion in the cyclone control tube 121, the vacuum control tube 122 and the chemical agent slow-release dosing tube 123;

[0121] The swirl regulating control ring 312 is driven by a prior art servo motor (not shown) fixed on the outside of the swirl control tube 121 through gear transmission to rotate around the axis of the swirl control tube 121. Under the mutual constraint of the swirl deflection constraint slide groove 3120 and the swirl deflection constraint slide column 3130, the swirl regulating control ring 312 drives the guide plate rotating shaft 311 to rotate through the swirl deflection driving connecting rod 313, and the guide plate rotating shaft 311 further drives the swirl guide plate 310 to deflect. When the groundwater body 100 flows through the swirl control tube 121, under the diversion effect of the swirl guide plate 310, the groundwater body 100 generates a swirl motion rotating around the axis of the swirl control tube 121 during the circulation process, and the groundwater body 100 is still in a swirl motion when flowing through the vacuum control tube 122 and the chemical agent slow-release dosing tube 123;

[0122] The groundwater body 100 in a swirling motion state can make the chemical agent and the groundwater body 100 disperse and mix together more quickly and evenly;

[0123] S5. Assisted release of chemicals into groundwater:

[0124] Using the reagent-assisted accelerated dosing mechanism 33 to assist in releasing the chemical reagent into the groundwater;

[0125] The chemical agent is transported into the accelerated dosing input annular shell 331, and the chemical agent in the accelerated dosing input annular shell 331 is discharged through each accelerated dosing nozzle 332, so that the chemical agent is mixed with the groundwater body 100;

[0126] When the groundwater body 100 flows through the accelerating agent dosing pipe 124, due to the existence of the cross-section constraint axis 330, the flow cross-section of the groundwater body 100 becomes smaller, forcing the flow velocity of the groundwater body 100 to increase. The larger flow velocity can make the groundwater body 100 and the chemical agent mix better.

[0127] Embodiment 3: Based on embodiment 1, Figure 6 As shown, a vacuum control mechanism 32 is provided on the vacuum control tube 122, and the vacuum control mechanism 32 includes a vacuum liquid level monitoring tube 321 fixed on the upper side of the vacuum control tube 122 and connected thereto and extending vertically, and a vacuum buffer box 322 is connected to the upper end of the vacuum liquid level monitoring tube 321, and the vacuum buffer box 322 is connected to a vacuum pump 323 through a pipeline;

[0128] A vacuum monitoring liquid level gauge 320 is fixed to the inner wall of the vacuum liquid level monitoring tube 321;

[0129] The vacuum monitoring level gauge 320 is a photoelectric level gauge of the prior art;

[0130] The upper end of the vacuum liquid level monitoring tube 321 is connected to the vacuum buffer box 322 through a vacuum control short tube 324 , and a vacuum control valve 3240 is provided on the vacuum control short tube 324 .

[0131] Example 4: This example describes a method for chemically oxidizing and repairing groundwater contaminated by chlorinated hydrocarbons. It is based on a device for chemically oxidizing and repairing groundwater contaminated by chlorinated hydrocarbons in the above-mentioned Example 3. The difference from Example 2 is that in step S2, the vacuum control mechanism 32 is used to evacuate the pipes of the repair circulation mechanism 12 to introduce groundwater into the pipes of the repair circulation mechanism 12.

[0132] The vacuum control valve 3240 is opened to connect the vacuum liquid level monitoring tube 321 with the vacuum buffer tank 322. The vacuum pump 323 is used to evacuate the inside of the vacuum buffer tank 322. Under the action of negative pressure, the groundwater body 100 will gradually flow into the swirl control tubes 121, the vacuum control tube 122, the chemical agent slow-release dosing tube 123, the accelerating agent dosing tube 124 and the auxiliary drive circulation tube 125 through the initial lifting delivery tube 110 and the return delivery tube 130.

[0133] When the vacuum monitoring liquid level meter 320 detects that the underground water body 100 enters the vacuum liquid level monitoring pipe 321 , the vacuum control valve 3240 is closed and the vacuum pump 323 is stopped to evacuate the vacuum buffer tank 322 .

[0134] Embodiment 5: Based on embodiment 3, Figure 8 As shown, the auxiliary drive circulation pipe 125 is provided with a circulation auxiliary drive mechanism 34, and the circulation auxiliary drive mechanism 34 includes an auxiliary drive accommodating shell 341 fixed in the auxiliary drive circulation pipe 125, and the auxiliary drive accommodating shell 341 is rotatably connected with a blade shaft 342 extending along the axis of the auxiliary drive circulation pipe 125, and an auxiliary drive propeller 340 is fixed at the outer end of the blade shaft 342;

[0135] A driven bevel gear 3420 is fixed to one end of the blade shaft 342 in the auxiliary drive housing 341, a vertically extending auxiliary drive shaft 343 is rotatably connected to the auxiliary drive housing 341, a driving bevel gear 3430 is fixed to one end of the auxiliary drive shaft 343 in the auxiliary drive housing 341, and the driving bevel gear 3430 is meshedly connected with the driven bevel gear 3420;

[0136] The auxiliary drive shaft 343 extends to the outside of the auxiliary drive circulation pipe 125 , and a windmill 345 of the prior art is fixed on the ground, and the rotating shaft of the windmill 345 is transmission-connected to the auxiliary drive shaft 343 .

[0137] Example 6: This example describes a method for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons. The method is based on a device for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons in Example 5. The difference from Example 4 is that it further includes step S6.

[0138] S6. Auxiliary driving of groundwater circulation:

[0139] Driven by natural wind, the auxiliary drive shaft 343 is driven to rotate through the windmill 345 (existing technology), and the auxiliary drive shaft 343 drives the blade shaft 342 to rotate through the meshing connection between the active bevel gear 3430 and the driven bevel gear 3420. The blade shaft 342 then drives the auxiliary drive propeller 340 to rotate, thereby driving the groundwater body 100 flowing through the auxiliary drive circulation pipe 125, so that the groundwater body 100 can flow more smoothly during the circulation process.

[0140] Example 7: Based on Example 5, an input end lifting mechanism 14 is provided at one end of the initial lifting delivery pipe 110 placed in the groundwater body 100, such as Figure 2 As shown, the input end lifting mechanism 14 includes an input lifting fixed pipe 141 fixed to the lower end of the initial lifting and conveying pipe 110, and the input lifting fixed pipe 141 is connected to an input lifting moving pipe 143 through an input telescopic bellows 142;

[0141] A vertically extending initial input liquid level meter 147 is fixed to the outside of the input lifting and moving tube 143. The initial input liquid level meter 147 is a photoelectric liquid level meter of the prior art.

[0142] A lifting driving fixed cylinder 144 with an opening facing downward is fixed to the outside of the input lifting fixed tube 141, and a lifting driving sliding cylinder 145 with an opening facing upward is slidably connected inside the lifting driving fixed cylinder 144, and the lower end of the lifting driving sliding cylinder 145 is fixedly connected to the input lifting moving tube 143;

[0143] A lifting drive telescopic rod 146 is provided in the lifting drive fixed cylinder 144 for driving the lifting drive sliding cylinder 145 to move. The lifting drive telescopic rod 146 is an electric-controlled telescopic rod of the prior art. The outer rod end of the lifting drive telescopic rod 146 is fixedly connected to the top of the lifting drive fixed cylinder 144, and the inner rod end of the lifting drive telescopic rod 146 is fixedly connected to the bottom of the lifting drive sliding cylinder 145.

[0144] An input filter shell 15 connected to the input lifting and moving tube 143 is fixed at the lower end thereof. The input filter shell 15 is a porous hollow structure that is connected inside and outside.

[0145] like Figure 2 As shown, an input cleaning support ring 151 is fixed on the top of the input filter housing 15, and an input cleaning rotating ring 152 is rotatably connected to the outer side of the input cleaning support ring 151. The input cleaning rotating ring 152 has a vertically penetrating cleaning shaft connecting hole 1520, and a vertically extending cleaning rotating shaft 153 is rotatably connected in the cleaning shaft connecting hole 1520, and a cleaning brush 154 is provided on the cleaning rotating shaft 153;

[0146] The input cleaning rotating ring 152 is driven by a motor fixed on the input cleaning supporting ring 151 through gear transmission to rotate around the vertical axis of the input cleaning supporting ring 151;

[0147] A self-rotating matching gear ring 155 is fixed to the outer side of the input cleaning support ring 151 , and a self-rotating driving gear 156 is fixed to the cleaning shaft 153 . The self-rotating driving gear 156 is meshedly connected with the self-rotating matching gear ring 155 .

[0148] like Figure 1 As shown, one end of the return flow delivery pipe 130 placed in the groundwater body 100 is provided with a return flow end lifting mechanism 16, as shown in FIG. Figure 3 As shown, the return end lifting mechanism 16 includes a return lifting fixed pipe 161 fixed to the lower end of the return conveying pipe 130, and the return lifting fixed pipe 161 is connected to the return lifting movable pipe 163 through the return telescopic bellows 162;

[0149] A vertically extending reflux monitoring level gauge 167 is fixed to the outside of the reflux lifting and moving pipe 163. The reflux monitoring level gauge 167 is a photoelectric level gauge of the prior art.

[0150] A reflux lifting fixed cylinder 164 with its opening facing downward is fixed to the outside of the reflux lifting fixed tube 161, a reflux lifting sliding cylinder 165 with its opening facing upward is slidably connected inside the reflux lifting fixed cylinder 164, and the lower end of the reflux lifting sliding cylinder 165 is fixedly connected to the reflux lifting movable tube 163;

[0151] A reflux lifting fixed cylinder 164 is provided with a reflux lifting telescopic rod 166 for driving the reflux lifting sliding cylinder 165 to move. The reflux lifting telescopic rod 166 is an electrically controlled telescopic rod in the prior art. The outer rod end of the reflux lifting telescopic rod 166 is fixedly connected to the top of the reflux lifting fixed cylinder 164, and the inner rod end of the reflux lifting telescopic rod 166 is fixedly connected to the bottom of the reflux lifting sliding cylinder 165.

[0152] Embodiment 8: This embodiment describes a method for chemical oxidation repair of groundwater contaminated by chlorinated hydrocarbons, based on a device for chemical oxidation repair of groundwater contaminated by chlorinated hydrocarbons in the above embodiment 7, which differs from embodiment 6 in that it further includes step S7;

[0153] S7, Adaptive adjustment of input end lifting mechanism:

[0154] In the input end lifting mechanism 14, the inner rod of the lifting drive telescopic rod 146 is extended or retracted to drive the input lifting moving tube 143 to move downward or upward through the lifting drive sliding cylinder 145. According to the measurement result of the initial input liquid level meter 147, the height position of the input lifting moving tube 143 is controlled so that the lower end of the input lifting moving tube 143 is immersed at a depth of 20 cm from the groundwater surface;

[0155] A grating ruler of the prior art (not shown in the figure) is arranged between the lifting drive fixed cylinder 144 and the lifting drive sliding cylinder 145. The scale grating of the grating ruler is fixed on the inner wall of the lifting drive fixed cylinder 144. The grating reading head of the grating ruler is fixed on the inner wall of the lifting drive sliding cylinder 145. The relative position between the lifting drive sliding cylinder 145 and the lifting drive fixed cylinder 144 can be accurately monitored, and the height position of the input lifting moving tube 143 can be accurately controlled.

[0156] The input filter housing 15 can filter the groundwater body 100, and the input filter housing 15 is cleaned once every 24 hours;

[0157] The motor fixed on the input cleaning support ring 151 drives the input cleaning rotating ring 152 to rotate around the vertical axis of the input cleaning support ring 151 through gear transmission, and the input cleaning rotating ring 152 drives each cleaning rotating shaft 153 to rotate together;

[0158] Since the self-rotating driving gear 156 is meshed with the self-rotating matching gear ring 155, the cleaning shaft 153 can rotate around its own axis. Each cleaning shaft 153 can rotate around its own axis while revolving with the input cleaning rotating ring 152. Under the action of rotation, the cleaning brush 154 is used to clean the dirt attached to the outside of the input filter housing 15.

[0159] In the return end lifting mechanism 16, the inner rod of the return lifting telescopic rod 166 is extended or retracted to drive the return lifting moving tube 163 to move downward or upward through the return lifting sliding cylinder 165. According to the measurement result of the return monitoring liquid level meter 167, the height position of the return lifting moving tube 163 is controlled so that the lower end of the return lifting moving tube 163 is immersed at a depth of 20 cm from the groundwater surface;

[0160] A grating ruler (not shown in the figure) of prior art is arranged between the reflux lifting fixed cylinder 164 and the reflux lifting sliding cylinder 165. The scale grating of the grating ruler is fixed on the inner wall of the reflux lifting fixed cylinder 164, and the grating reading head of the grating ruler is fixed on the inner wall of the reflux lifting sliding cylinder 165. It can accurately monitor the relative position between the reflux lifting sliding cylinder 165 and the reflux lifting fixed cylinder 164, and then accurately control the height position of the reflux lifting moving tube 163.

[0161] Embodiment 9: The difference from Embodiment 7 is that Figure 4As shown, an adsorption and extrusion mechanism 22 is provided in the medicine delivery and storage tube 211, and the adsorption and extrusion mechanism 22 includes an adsorption and extrusion fixed cylinder 221 fixed on the inner side wall of the medicine delivery and storage tube 211 and opened at one end, and the adsorption and extrusion fixed cylinder 221 is arranged to extend in a direction parallel to the axis of the medicine delivery and storage tube 211, and an adsorption and extrusion sliding cylinder 222 is slidably connected in the adsorption and extrusion fixed cylinder 221, and the outer end of the adsorption and extrusion sliding cylinder 222 is fixedly connected to the sponge clamping circular plate 213;

[0162] An adsorption and extrusion fixed cylinder 221 is provided with an adsorption and extrusion telescopic rod 223 for driving the adsorption and extrusion sliding cylinder 222 to move. The adsorption and extrusion telescopic rod 223 is an electrically controlled telescopic rod in the prior art. The outer rod end of the adsorption and extrusion telescopic rod 223 is fixedly connected to the inner end of the adsorption and extrusion fixed cylinder 221, and the inner rod end of the adsorption and extrusion telescopic rod 223 is fixedly connected to the inner end of the adsorption and extrusion sliding cylinder 222.

[0163] Embodiment 10: This embodiment describes a method for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons, which is based on a device for chemically oxidizing and remediating groundwater contaminated by chlorinated hydrocarbons in the above embodiment 9. The difference from embodiment 8 is that in step S3, the adsorption and squeezing mechanism 22 is used to change the adsorption performance of the agent adsorption sponge 210, thereby adjusting the release rate of the chemical agent on the agent adsorption sponge 210;

[0164] The extension or retraction of the inner rod of the adsorption and extrusion telescopic rod 223 can drive the sponge clamping circular plate 213 to move in the medicine delivery and containing tube 211 through the adsorption and extrusion sliding cylinder 222, so that the sponge clamping circular plate 213 is close to or away from the medicine adsorption sponge 210, and then the medicine adsorption sponge 210 is squeezed or relaxed, so that the medicine adsorption sponge 210 is in a tight or loose state, and the adsorption performance of the medicine adsorption sponge 210 is changed, thereby achieving the purpose of adjusting the release rate of the chemical agent on the medicine adsorption sponge 210.

[0165] Embodiment 11: The difference from embodiment 9 is that Figure 4 As shown, an impact release mechanism 23 is provided on the medicine delivery containing tube 211, and the impact release mechanism 23 includes an impact release driving piston 231 slidably connected in the medicine delivery containing tube 211, an impact drive containing shell 230 is fixed at one end of the medicine delivery containing tube 211 away from the chemical agent slow-release dosing tube 123, an impact drive connecting rod 232 is fixed at one end of the impact release driving piston 231 away from the chemical agent slow-release dosing tube 123, and the impact drive connecting rod 232 extends to the inside of the impact drive containing shell 230, and an impact drive telescopic rod 233 for driving the impact release driving piston 231 to move is provided in the impact drive containing shell 230;

[0166] The impact drive telescopic rod 233 is an electrically controlled telescopic rod in the prior art. The outer rod end of the impact drive telescopic rod 233 is fixedly connected to the impact drive accommodating shell 230 , and the inner rod end of the impact drive telescopic rod 233 is fixedly connected to the impact drive connecting rod 232 .

[0167] Embodiment 12: This embodiment describes a method for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons, which is based on a device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons in the above embodiment 11. The difference from embodiment 10 is that in step S3, the impact release mechanism 23 can quickly release the chemical agent on the agent adsorption sponge 210 into the groundwater body 100;

[0168] The inner rod of the impact-driven telescopic rod 233 performs reciprocating extension and retraction movements, and the impact-driven telescopic rod 233 drives the impact release driving piston 231 to reciprocate in the agent delivery and containing tube 211 through the impact-driven connecting rod 232, so that the water flow reciprocatingly impacts the agent adsorption sponge 210, so that the chemical agent on the agent adsorption sponge 210 can be quickly released into the groundwater body 100.

Claims

1. A device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons, characterized in that: It comprises a pipeline conveying mechanism (10), and a chemical oxidation repair mechanism (20) arranged on the pipeline conveying mechanism (10); The pipeline conveying mechanism (10) comprises an initial lifting mechanism (11), a repair circulation mechanism (12) and a return flow mechanism (13) which are connected in sequence; The repair circulation mechanism (12) comprises a swirl control tube (121), a vacuum control tube (122), a chemical agent slow-release dosing tube (123), an accelerating agent dosing tube (124), and an auxiliary drive circulation tube (125) which are sequentially connected and arranged; The initial lifting mechanism (11) comprises an initial lifting conveying pipe (110), one end of the initial lifting conveying pipe (110) is placed in an upstream section in the groundwater body (100), and the other end of the initial lifting conveying pipe (110) is connected to the swirl control pipe (121); The reflux mechanism (13) comprises a reflux delivery pipe (130) connected to the auxiliary drive circulation pipe (125), and the other end of the reflux delivery pipe (130) is placed in a downstream section in the groundwater body (100); The chemical oxidation repair mechanism (20) comprises a plurality of chemical oxidation repair units (21) arranged outside the chemical agent slow-release dosing tube (123); The chemical oxidation repair unit (21) comprises a plurality of agent delivery and containing tubes (211) fixed to the outside of the chemical agent slow-release dosing tube (123); the agent delivery and containing tubes (211) are arranged along the radial extension of the chemical agent slow-release dosing tube (123) and are in communication with the inside of the chemical agent slow-release dosing tube (123); A sponge limiting baffle (212) is fixed in the medicine delivery and containing tube (211), a sponge clamping circular plate (213) is slidably connected in the medicine delivery and containing tube (211), and a medicine adsorption sponge (210) is clamped and constrained between the sponge limiting baffle (212) and the sponge clamping circular plate (213); The position of the medicine adsorption sponge (210) in the medicine delivery and containing tube (211) forms a medicine adsorption chamber; A plurality of drug input tubes (214) connected to the drug adsorption chamber are fixed on the outside of the drug delivery and containing tube (211); The medicine delivery and storage tube (211) is provided with an adsorption and extrusion mechanism (22), the adsorption and extrusion mechanism (22) comprising an adsorption and extrusion fixed cylinder (221) fixed on the inner side wall of the medicine delivery and storage tube (211) and having one end open, an adsorption and extrusion sliding cylinder (222) being slidably connected inside the adsorption and extrusion fixed cylinder (221), and an outer end of the adsorption and extrusion sliding cylinder (222) being fixedly connected to the sponge clamping circular plate (213); An adsorption and extrusion telescopic rod (223) for driving the adsorption and extrusion sliding cylinder (222) to move is provided in the adsorption and extrusion fixed cylinder (221); The medicament delivery and containing tube (211) is provided with an impact release mechanism (23), the impact release mechanism (23) comprising an impact release driving piston (231) slidably connected in the medicament delivery and containing tube (211), an impact drive containing shell (230) is fixed to one end of the medicament delivery and containing tube (211) away from the chemical agent slow-release dosing tube (123), an impact drive connecting rod (232) is fixed to one end of the impact release driving piston (231) away from the chemical agent slow-release dosing tube (123), the impact drive connecting rod (232) extends into the interior of the impact drive containing shell (230), and an impact drive telescopic rod (233) for driving the impact release driving piston (231) to move is provided in the impact drive containing shell (230).

2. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 1, characterized in that: An input end lifting mechanism (14) is provided at one end of the initial lifting delivery pipe (110) placed in the underground water body (100), the input end lifting mechanism (14) comprising an input lifting fixed pipe (141) fixed to the lower end of the initial lifting delivery pipe (110), the input lifting fixed pipe (141) being connected to an input lifting movable pipe (143) via an input telescopic bellows (142), and an initial input liquid level meter (147) extending vertically is fixed to the outer side of the input lifting movable pipe (143); A lifting drive fixed cylinder (144) with an opening facing downward is fixed on the outside of the input lifting fixed tube (141), a lifting drive sliding cylinder (145) with an opening facing upward is slidably connected inside the lifting drive fixed cylinder (144), and the lower end of the lifting drive sliding cylinder (145) is fixedly connected to the input lifting movable tube (143); The lifting drive fixed cylinder (144) is provided with a lifting drive telescopic rod (146) for driving the lifting drive sliding cylinder (145) to move; An input filter shell (15) connected to the input lifting and moving tube (143) is fixed at the lower end thereof, and the input filter shell (15) is a porous hollow structure that is connected inside and outside.

3. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 2, characterized in that: An input cleaning support ring (151) is fixed on the top of the input filter housing (15); an input cleaning rotating ring (152) is rotatably connected to the outside of the input cleaning support ring (151); a vertically penetrating cleaning shaft connecting hole (1520) is provided on the input cleaning rotating ring (152); a vertically extending cleaning rotating shaft (153) is rotatably connected in the cleaning shaft connecting hole (1520); and a cleaning brush (154) is provided on the cleaning rotating shaft (153); A self-rotating mating gear ring (155) is fixed on the outer side of the input cleaning support ring (151), a self-rotating driving gear (156) is fixed on the cleaning shaft (153), and the self-rotating driving gear (156) is meshingly connected with the self-rotating mating gear ring (155); A return end lifting mechanism (16) is provided at one end of the return flow delivery pipe (130) placed in the underground water body (100); the return end lifting mechanism (16) comprises a return flow lifting fixed pipe (161) fixed to the lower end of the return flow delivery pipe (130); the return flow lifting fixed pipe (161) is connected to a return flow lifting movable pipe (163) via a return flow telescopic bellows (162); A reflux monitoring liquid level gauge (167) extending vertically is fixed on the outer side of the reflux lifting and moving pipe (163); A reflux lifting fixed cylinder (164) with an opening facing downward is fixed on the outside of the reflux lifting fixed tube (161), a reflux lifting sliding cylinder (165) with an opening facing upward is slidably connected inside the reflux lifting fixed cylinder (164), and the lower end of the reflux lifting sliding cylinder (165) is fixedly connected to the reflux lifting movable tube (163); A reflux lifting telescopic rod (166) for driving the reflux lifting sliding cylinder (165) to move is arranged in the reflux lifting fixed cylinder (164).

4. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 1, characterized in that: The swirl control tube (121) is provided with a swirl control mechanism (31), the swirl control mechanism (31) comprising a plurality of swirl guide plates (310) rotatably connected to the inner side of the swirl control tube (121), a swirl shaft connection hole (3101) penetrating in the radial direction of the swirl control tube (121) is provided on the side wall of the swirl control tube (121), a guide plate shaft (311) is rotatably connected in the swirl shaft connection hole (3101), and the plurality of swirl guide plates (310) are fixedly connected to the inner ends of the guide plate shafts (311) in a one-to-one correspondence; The outer side of the swirl control tube (121) is rotatably connected to a swirl regulating control ring (312), and the outer side of the swirl regulating control ring (312) has a plurality of swirl deflection constraint slide grooves (3120) extending in a direction parallel to the axial direction of the swirl control tube (121). A swirl deflection drive connecting rod (313) is fixed to the outer end of the guide plate rotating shaft (311), and a swirl deflection constraint sliding column (3130) is fixed to the swirl deflection drive connecting rod (313), and the plurality of swirl deflection constraint sliding columns (3130) are slidably connected in respective swirl deflection constraint slide grooves (3120) in a one-to-one corresponding manner.

5. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 1, characterized in that: The vacuum control tube (122) is provided with a vacuum control mechanism (32), the vacuum control mechanism (32) comprising a vacuum liquid level monitoring tube (321) fixed on the upper side of the vacuum control tube (122) and connected thereto and extending vertically, the upper end of the vacuum liquid level monitoring tube (321) being connected thereto with a vacuum buffer box (322), the vacuum buffer box (322) being connected to a vacuum pump (323) via a pipeline; A vacuum monitoring liquid level gauge (320) is fixed to the inner side wall of the vacuum liquid level monitoring tube (321); The upper end of the vacuum liquid level monitoring tube (321) is connected to the vacuum buffer box (322) via a vacuum control short tube (324), and a vacuum control valve (3240) is provided on the vacuum control short tube (324).

6. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 1, characterized in that: The accelerating agent dosing pipe (124) is provided with an agent-assisted accelerating dosing mechanism (33), the agent-assisted accelerating dosing mechanism (33) comprising an annular and hollow accelerating dosing input ring shell (331) fixed to the inner side of the accelerating agent dosing pipe (124), a plurality of accelerating dosing nozzles (332) connected to the inner side of the accelerating dosing input ring shell (331) being fixed to the inner side of the accelerating dosing input ring shell (331); A cross-section constraint shaft (330) extending along the axis of the accelerating agent dosing pipe (124) is fixed inside the accelerating agent dosing pipe (124), and both ends of the cross-section constraint shaft (330) are streamlined structures.

7. The device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 1, characterized in that: The auxiliary drive circulation pipe (125) is provided with an auxiliary circulation drive mechanism (34), the auxiliary circulation drive mechanism (34) comprising an auxiliary drive accommodating shell (341) fixed in the auxiliary drive circulation pipe (125), a blade rotating shaft (342) extending along the axis of the auxiliary drive circulation pipe (125) being rotatably connected to the auxiliary drive accommodating shell (341), and an auxiliary drive propeller (340) being fixed to the outer end of the blade rotating shaft (342); A driven bevel gear (3420) is fixed to one end of the blade rotating shaft (342) located in the auxiliary drive housing (341); a vertically extending auxiliary driving shaft (343) is rotatably connected to the auxiliary drive housing (341); a driving bevel gear (3430) is fixed to one end of the auxiliary driving shaft (343) located in the auxiliary drive housing (341); the driving bevel gear (3430) is meshingly connected to the driven bevel gear (3420); The auxiliary drive shaft (343) extends to the outside of the auxiliary drive circulation pipe (125), and a windmill (345) is fixed on the ground, and the rotating shaft of the windmill (345) is connected to the auxiliary drive shaft (343) in a transmission manner.

8. A method for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons, based on the device for chemical oxidation remediation of groundwater contaminated by chlorinated hydrocarbons according to claim 6, characterized in that: The following steps are involved: S1. Equipment installation: Two vertically extending restoration wells connected to the groundwater body (100) are drilled at a distance of 100 m from each other along the groundwater flow direction, and a 3 m deep equipment accommodation pit is dug between the two restoration wells; The initial lifting and conveying pipe (110) is fixedly placed in the repair well at the upstream end, and the lower end of the initial lifting and conveying pipe (110) is immersed in the groundwater body (100); The return flow conveying pipe (130) is fixedly placed in the repair well at the downstream end, and the lower end of the return flow conveying pipe (130) is immersed in the groundwater body (100); The entire repair circulation mechanism (12) is installed in the equipment receiving pit, the initial lifting conveying pipe (110) is connected and fixedly installed with the swirl control pipe (121), and the return flow conveying pipe (130) is connected and fixedly installed with the auxiliary driving circulation pipe (125); S2. Groundwater drainage: Vacuuming each pipe of the repair circulation mechanism (12) to introduce groundwater into each pipe of the repair circulation mechanism (12) under the action of negative pressure; The initial lifting and conveying pipe (110) and the return flow conveying pipe (130) as well as the swirl control pipes (121), the vacuum control pipe (122), the chemical agent slow-release dosing pipe (123), the accelerating agent dosing pipe (124), and the auxiliary drive circulation pipe (125) form an inverted U-shaped communicating vessel structure, and there is a liquid level difference between the downstream end and the upstream end of the groundwater body (100). Under the action of gravity, the groundwater body (100) can flow naturally in the initial lifting and conveying pipe (110) and the return flow conveying pipe (130) as well as the swirl control pipes (121), the vacuum control pipe (122), the chemical agent slow-release dosing pipe (123), the accelerating agent dosing pipe (124), and the auxiliary drive circulation pipe (125); S3. Release of chemical agents: When the groundwater body (100) flows through the chemical agent slow-release dosing pipe (123), the chemical agent is transported to each agent input pipe (214), and the chemical agent in the agent input pipe (214) is transported to the agent adsorption chamber, and the chemical agent is adsorbed on the agent adsorption sponge (210); Since the sponge limit baffle (212) is a porous hollow structure with two sides penetrating therethrough, the groundwater body (100) can come into contact with the chemical adsorption sponge (210) when flowing through the chemical agent slow-release dosing pipe (123), and the chemical agent on the chemical adsorption sponge (210) can naturally diffuse into the groundwater body (100); S4. Regulate the flow characteristics of groundwater: The cyclone control mechanism (31) is used to cause the underground water body (100) to generate cyclone motion in the cyclone control tube (121), the vacuum control tube (122) and the chemical agent slow-release dosing tube (123); A servo motor fixed on the outside of the swirl control tube (121) drives the swirl regulating control ring (312) to rotate around the axis of the swirl control tube (121) through gear transmission. Under the mutual constraints of the swirl deflection constraint slide groove (3120) and the swirl deflection constraint slide column (3130), the swirl regulating control ring (312) drives the guide plate rotating shaft (311) to rotate through the swirl deflection driving connecting rod (313). The guide plate rotating shaft (311) This drives the swirl guide plate (310) to deflect, and when the groundwater body (100) flows through the swirl control tube (121), under the guidance of the swirl guide plate (310), the groundwater body (100) generates a swirl motion rotating around the axis of the swirl control tube (121) during the circulation process, and the groundwater body (100) is still in a swirl motion when flowing through the vacuum control tube (122) and the chemical agent slow-release dosing tube (123); S5. Assisted release of chemicals into groundwater: Using a chemical-assisted accelerated dosing mechanism (33) to assist in releasing the chemical into the groundwater; The chemical agent is transported into the accelerated dosing input annular shell (331), and the chemical agent in the accelerated dosing input annular shell (331) is discharged through each accelerated dosing nozzle (332), so that the chemical agent is mixed with the groundwater body (100); When the groundwater body (100) flows through the accelerating agent dosing pipe (124), the flow cross section of the groundwater body (100) becomes smaller due to the presence of the cross-section constraint axis (330), forcing the flow velocity of the groundwater body (100) to increase. The larger flow velocity allows the groundwater body (100) to be better mixed with the chemical agent.

Images