Organic contaminated groundwater extraction treatment apparatus and treatment method

Abstract

The application provides an organic contaminated groundwater extraction treatment device and treatment method, and belongs to the technical field of groundwater treatment. The device comprises a water pumping well, a plurality of water injection wells which are uniformly distributed in the periphery of the water pumping well, a medicament mixing treatment assembly arranged at the water pumping well, an extraction circulation assembly for connecting the water pumping well and each water injection well, and an electrode treatment assembly arranged between the water pumping well and the water injection well. The application forms external circulation recharge between the water pumping well and each water injection well, forms internal circulation recharge between the mixing treatment cylinder and the water pumping well, and flexibly selects whether to use external circulation recharge to discharge the purified water into the water injection well or to use internal circulation recharge to discharge the water into the water pumping well and then to fall into the bottom end area of the water pumping well for reprocessing according to the detection result of the treated water quality. The design ensures the treatment effect and improves the resource utilization.

Description

Technical Field

[0001] The invention belongs to the technical field of groundwater treatment, and in particular relates to an organic polluted groundwater extraction and treatment device and a treatment method. Background Art

[0002] As industrial manufacturing enterprises in major cities begin to relocate to other places, the problem of groundwater pollution in the relocation sites has become increasingly prominent. Among them, the main production equipment of most industrial manufacturing enterprises has caused petroleum hydrocarbon pollution in shallow groundwater due to improper production operation and maintenance or inadequate anti-seepage measures during long-term production and use. Therefore, it is necessary to adopt efficient and rapid remediation technology to meet the progress requirements of land redevelopment and utilization.

[0003] In groundwater contaminated sites, extraction and treatment technology is the most widely used and mature ex situ remediation technology. It can be used to treat various types of pollutants in heavily contaminated groundwater areas, and is often used to treat organic pollution and heavy metal pollution.

[0004] When using the existing extraction treatment, the irrigation path cannot be selected according to the water quality of the contaminated groundwater treatment, and the treatment effect is poor. At the same time, the treatment method is single and the treatment effect is limited, and it cannot reduce the pollution of groundwater from the source. Summary of the Invention

[0005] In response to the above-mentioned problems, the present invention provides an organic contaminated groundwater extraction and treatment device and a treatment method.

[0006] The technical solution of the present invention is: an organic contaminated groundwater extraction and treatment device, comprising a pumping well, a plurality of injection wells uniformly distributed circumferentially around the pumping well, a reagent mixing treatment component provided at the pumping well, an extraction circulation component for connecting the pumping well and each of the injection wells, and an electrode treatment component provided between the pumping well and the injection well;

[0007] The medicine mixing and processing assembly includes a mixing and processing cylinder, a medicine holding cylinder connected to the mixing and processing cylinder, an atomizing disk provided at the bottom end of the mixing and processing cylinder, and a hollow liquid dispersion rack provided at the upper end of the mixing and processing cylinder and distributed opposite to the atomizing disk. The atomizing disk is connected to the medicine holding cylinder via a connecting pipe, and the upper end of the mixing and processing cylinder is connected to an exhaust gas processor via a connecting pipe.

[0008] The extraction circulation assembly includes a water pump for connecting the hollow bulk liquid rack and the pumping well, the bottom end of which extends into the groundwater layer, a water pump connected to the water pump, a plurality of external circulation water injection pipes for connecting the chemical mixing treatment cylinder and each water injection well, the connection points of which are provided with a water quality detector, and an internal circulation water injection pipe provided on each of the external circulation water injection pipes and extending to the contaminated soil layer and penetratingly connected to the side wall of the pumping well;

[0009] The electrode treatment assembly includes an anode well located between a pumping well and an injection well located upstream, a cathode well located between the pumping well and an injection well located downstream, an anode plate located in the anode well, a cathode plate located in the cathode well, and a power supply for connecting the anode plate and the cathode plate.

[0010] Furthermore, the hollow liquid dispersion rack includes a plurality of horizontal liquid dispersion plates distributed in parallel from top to bottom, a plurality of hollow liquid separation columns arranged between two adjacent horizontal liquid dispersion plates, a plurality of liquid dispersion holes arranged on the bottom wall of the bottommost horizontal liquid dispersion plate, and a filtrate net arranged in each liquid dispersion hole.

[0011] Description: When groundwater is injected into the hollow bulk liquid rack through the pumping pipe, it first enters the horizontal bulk liquid plate at the top, and is dispersed into multiple parts through the hollow liquid separation columns at the bottom of the horizontal bulk liquid plate and passes into the second horizontal bulk liquid plate. It is dispersed into more parts through the hollow liquid separation columns again and passes into the next horizontal bulk liquid plate. The above process is repeated. After the water body dispersed into multiple parts passes through the horizontal bulk liquid plate at the bottom, it is broken up into liquid droplets through the filtrate nets at its bottom, and collides and reacts with the atomized agent sprayed from the atomizing disk, which can remove organic matter in the groundwater. By dispersing the water body into multiple parts and finally breaking it into liquid droplets, the contact area between the water body and the atomized agent is increased, thereby improving the reaction efficiency.

[0012] Furthermore, the diameters of the hollow liquid separation columns located between the same two horizontal liquid dispersion plates are the same, and the diameters of the hollow liquid separation columns distributed from top to bottom decrease successively.

[0013] Note: By limiting the diameters of the hollow liquid separation columns distributed from top to bottom to decrease in sequence, the water body can be further subdivided into smaller parts when passing through each level of horizontal liquid dispersion plate, thereby increasing the contact opportunity between the water body and the atomized agent and improving the reaction efficiency.

[0014] Furthermore, a ventilation pipe is provided on the outer wall of the water pumping pipe, and one end of the ventilation pipe is connected to an air compressor, and the other end is connected to an aeration ring. The center of the aeration ring is connected to the bottom end of the outer wall of the water pumping pipe through multiple first connecting rods, and the bottom end of the aeration ring is evenly provided with multiple aeration holes along the circumference.

[0015] Note: When extracting contaminated groundwater, external air is drawn in by an air compressor and passed into the aeration ring through the ventilation pipe, and aeration is carried out through the various aeration holes on the aeration ring, which significantly increases the dissolved oxygen content at the bottom of the pumping pipe. The increase in dissolved oxygen is crucial for the activity of aerobic microorganisms, which can decompose organic pollutants in the water and improve the treatment effect of groundwater.

[0016] Furthermore, the inner wall of the pumping well is evenly provided with a plurality of reinforcement rings movably connected to the outer wall of the pumping pipe from top to bottom. The bottom end of the outer wall of the pumping pipe and the periphery of the aeration ring are connected to a pyrolysis ring through a plurality of second connecting rods. The bottom end of the pyrolysis ring is evenly provided with a plurality of heating rods distributed in a divergent manner along the circumference.

[0017] Description: The movable clamping reinforcement ring on the outer wall of the pumping pipe can, on the one hand, effectively increase the stability of the pumping well wall to avoid damage or collapse of the well wall due to external forces. On the other hand, it can support the pumping pipe, limit the vibration of the pumping pipe, and maintain its stable position in the pumping well. Heating the water at the bottom of the pumping pipe through the heating rod can increase the temperature of the water, thereby accelerating the pyrolysis process and promoting the decomposition of pollutants.

[0018] Furthermore, the bottom end of the pyrolysis ring is provided with a mounting port which corresponds one-to-one to the heating rod and is hinged, and the inner wall of the pyrolysis ring is connected with a mounting cylinder with an opening structure at the top and bottom. Each of the heating rods is connected to the mounting cylinder through two hinged third connecting rods, and the two third connecting rods are connected through a first hydraulic cylinder. The upper end of the second connecting rod is hinged to the outer wall of the water pumping pipe, and the outer wall of the second connecting rod and the water pumping pipe are connected through a second hydraulic cylinder.

[0019] Note: When the angle of each heating rod needs to be adjusted, the extension and compression of the first hydraulic cylinder causes the angle between the two third connecting rods to change, and the corresponding heating rods will also rotate, so as to achieve the purpose of adjusting the heating rods. Adjusting the angle of the heating rods can optimize the distribution of heat energy in the water body, ensure that heat is evenly transferred to the area that needs to be treated, and reduce energy waste.

[0020] Furthermore, the outer wall of the heating rod is provided with a heat-conducting shell, and the material of the heat-conducting shell is titanium alloy.

[0021] Note: The purpose of setting up the heat-conducting shell is to ensure the heat conduction of the heating rod in the contaminated groundwater. The heat-conducting shell made of titanium alloy has corrosion resistance, which can prevent it from being corroded and damaged by various corrosive chemicals in the groundwater, thereby ensuring its service life.

[0022] Furthermore, a gas circulation pipe is connected between the air outlet and the air inlet of the exhaust gas processor, and an air quality detector is provided at the air outlet of the exhaust gas processor.

[0023] Description: The air quality detector can monitor the gas composition of the treated exhaust gas flowing out of the mixing treatment cylinder in real time to ensure that the discharged gas meets the environmental protection standards. The gas that does not meet the environmental protection standards is re-processed through the gas circulation pipe to avoid secondary air pollution, which has the advantage of being green and environmentally friendly.

[0024] The present invention discloses a method for extracting and treating organically contaminated groundwater, which is based on the above-mentioned organically contaminated groundwater extraction and treatment equipment and includes the following steps:

[0025] S1. Power is supplied to the anode and cathode plates. Positively charged ions in the soil above the groundwater move toward the cathode plate and accumulate in the area near the cathode plate. Negatively charged ions move toward the anode plate and accumulate in the area near the anode plate, achieving the purpose of removing pollutants from the soil.

[0026] S2. Start the water pump, and use the water pump to pump the contaminated groundwater to the upper end of the hollow bulk liquid rack through the water pump, and the contaminated groundwater is broken up into liquid droplets by the hollow bulk liquid rack. At the same time, the additive agent in the agent holding cylinder is atomized by the atomizing disk, and collides with the relatively dripping liquid droplets to remove organic matter in the groundwater. After the treatment is completed, the purified water body is tested by a water quality detector to see if the purified water body meets the discharge standard. The exhaust gas generated after the treatment is treated by the exhaust gas processor and then discharged;

[0027] S3. When the discharge standard is reached, the water falls into the corresponding injection well through each external circulation injection pipe and flows back into the groundwater. When the discharge standard is not reached, the water body is discharged into the pumping well through the internal circulation injection pipe and falls into the bottom area of ​​the pumping well. Then, it is re-pumped to the mixing treatment cylinder for treatment.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The organic contaminated groundwater extraction and treatment equipment of the present invention forms an external circulation recharge between the pumping well and each injection well, and forms an internal circulation recharge between the mixing treatment cylinder and the pumping well. According to the result of the water quality test after treatment, it is flexibly selected whether to recharge the purified water into the injection well by the external circulation or to discharge the water into the pumping well by the internal circulation recharge and drop it into the bottom area of ​​the pumping well, and then re-process it. This design not only ensures the treatment effect, but also improves the utilization rate of resources. When the contaminated groundwater is pumped to the mixing treatment cylinder through the pumping pipe, the contaminated groundwater is broken up into liquid droplets by the hollow liquid dispersion rack. At the same time, it is sprayed by the atomizing disk. The added agent in the agent holding cylinder is atomized and collides and reacts with the relatively dripping liquid droplets, which can remove organic matter in the groundwater, increase the contact area between the water body and the atomized agent, and thus improve the reaction efficiency; the electrode treatment component can effectively remove positively and negatively charged ions in the soil near the groundwater, and promote the migration and enrichment of pollutants through the action of the electric field, thereby improving the efficiency of removing pollutants in the soil. The present invention couples electrolysis treatment and groundwater extraction treatment to achieve in-situ remediation, reduce the migration of pollutants in the soil to groundwater from the source, and fundamentally reduce groundwater pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the hollow bulk liquid rack of the present invention;

[0032] Figure 3 This is a schematic diagram of the installation structure of the aeration ring of the present invention at the bottom end of the water pumping pipe;

[0033] Figure 4 This is a schematic diagram of the installation structure of the heating rod of the present invention;

[0034] Figure 5 The present invention Figure 4 A magnified view of point A in the figure;

[0035] Among them, 1- pumping well, 10- reinforcement ring, 100- second connecting rod, 11- thermal decomposition ring, 110- installation port, 111- installation cylinder, 112- third connecting rod, 113- first hydraulic cylinder, 12- heating rod, 120- heat conductive shell, 2- water injection well, 3- reagent mixing treatment component, 30- mixing treatment cylinder, 31- reagent holding cylinder, 32- atomizing disk, 33- hollow liquid rack, 330- horizontal liquid plate, 331- hollow liquid separation column, 332- liquid hole, 333- filtrate net, 34- Exhaust gas processor, 340-gas circulation pipe, 341-air quality detector, 4-extraction circulation assembly, 40-water extraction pipe, 400-vent pipe, 401-air compressor, 402-aeration ring, 403-first connecting rod, 404-aeration hole, 41-water pump, 42-external circulation water injection pipe, 420-water quality detector, 43-internal circulation water injection pipe, 44-second hydraulic cylinder, 5-electrode treatment assembly, 50-anode well, 51-cathode well, 52-anode plate, 53-cathode plate, 54-power supply. DETAILED DESCRIPTION

[0036] In order to further understand the content of the present invention, the present invention is described in detail below through examples.

[0037] Example 1

[0038] like Figure 1 As shown, an organic contaminated groundwater extraction and treatment device includes a pumping well 1, four injection wells 2 evenly distributed along the circumference around the pumping well 1, a reagent mixing treatment component 3 provided at the pumping well 1, an extraction circulation component 4 for connecting the pumping well 1 and each injection well 2, and an electrode treatment component 5 provided between the pumping well 1 and the injection well 2;

[0039] The reagent mixing and processing assembly 3 includes a mixing and processing cylinder 30, a reagent holding cylinder 31 connected to the mixing and processing cylinder 30, an atomizing disk 32 provided at the bottom end of the mixing and processing cylinder 30, and a hollow liquid dispersion rack 33 provided at the upper end of the mixing and processing cylinder 30 and distributed opposite to the atomizing disk 32. The atomizing disk 32 is connected to the reagent holding cylinder 31 via a connecting pipe, and the upper end of the mixing and processing cylinder 30 is connected to an exhaust gas processor 34 via a connecting pipe. The reagent stored in the reagent holding cylinder 31 is one of permanganate, hydrogen peroxide, Fenton's reagent, persulfate and ozone. The atomizing disk 32 and the exhaust gas processor 34 adopt existing technology.

[0040] The extraction circulation assembly 4 includes a water pumping pipe 40 for connecting the hollow bulk liquid rack 33 and the pumping well 1 and extending its bottom end into the groundwater layer, a water pump 41 connected to the water pumping pipe 40, four external circulation water injection pipes 42 for connecting the chemical mixing treatment cylinder 3 and each water injection well 2 and provided with a water quality detector 420 at the connection point, and an internal circulation water injection pipe 43 provided on each external circulation water injection pipe 42 and extending to the contaminated soil layer and connected to the side wall of the pumping well 1. Among them, electromagnetic valves are provided on both the external circulation water injection pipe 42 and the internal circulation water injection pipe 43, and the water pump 41 and the water quality detector 420 adopt existing technology;

[0041] The electrode treatment assembly 5 includes an anode well 50 disposed between the pumping well 1 and the injection well 2 located upstream, a cathode well 51 disposed between the pumping well 1 and the injection well 2 located downstream, an anode plate 52 disposed in the anode well 50, a cathode plate 53 disposed in the cathode well 51, and a power supply 54 for connecting the anode plate 52 and the cathode plate 53. The anode plate 52, the cathode plate 53, and the power supply 54 all adopt existing technology.

[0042] like Figure 2 As shown, the hollow liquid dispersion rack 33 includes three horizontal liquid dispersion plates 330 arranged in parallel from top to bottom, 15 hollow liquid separation columns 331 disposed between two adjacent horizontal liquid dispersion plates 330, 24 liquid dispersion holes 332 disposed on the bottom wall of the bottommost horizontal liquid dispersion plate 330, and a filtration net 333 disposed within each liquid dispersion hole 331. By dispersing the water into 15 portions and ultimately breaking them into liquid droplets, the contact area between the water and the atomized agent is increased, thereby improving the reaction efficiency.

[0043] The hollow liquid separation columns 331 located between the same two horizontal liquid dispersion plates 330 have the same diameter, and the diameters of the hollow liquid separation columns 331 decrease from top to bottom. By limiting the diameters of the hollow liquid separation columns 331 to decrease from top to bottom, the water body can be further subdivided into smaller parts when passing through each level of horizontal liquid dispersion plates 330, thereby increasing the contact opportunities between the water body and the atomized agent and improving the reaction efficiency.

[0044] A gas circulation pipe 340 is connected between the air outlet and the air inlet of the exhaust gas processor 34, and an air quality detector 341 is provided at the air outlet of the exhaust gas processor 34. The air quality detector 341 can monitor the gas composition of the treated exhaust gas flowing out of the mixing treatment cylinder 30 in real time to ensure that the discharged gas meets the environmental protection standards. The gas that does not meet the environmental protection standards is re-processed through the gas circulation pipe 340 to avoid secondary air pollution, which has the advantage of being green and environmentally friendly. Among them, the air quality detector 341 adopts existing technology.

[0045] Example 2

[0046] This embodiment discloses a method for extracting and treating organically contaminated groundwater, based on the organically contaminated groundwater extraction and treatment equipment of Example 1, comprising the following steps:

[0047] S1. Power is supplied to the anode plate 52 and the cathode plate 53 through the power supply 54. The positively charged ions in the soil above the groundwater move toward the cathode plate 53 and are concentrated in the area near the cathode plate 53. The negatively charged ions move toward the anode plate 52 and are concentrated in the area near the anode plate 52, thereby removing pollutants from the soil.

[0048] S2, start the water pump 41, and use the water pump 41 to pump the contaminated groundwater to the upper end of the hollow bulk rack 33 through the water pump pipe 40. At this time, the contaminated groundwater first enters the horizontal bulk plate 330 at the upper end, and passes through the hollow liquid separation columns 331 at the bottom end of the horizontal bulk plate 330 to be dispersed into multiple portions and pass into the second horizontal bulk plate 330. Then, it passes through the hollow liquid separation columns 331 again to be dispersed into more portions and pass into the next horizontal bulk plate 330. Repeat the above process. When the water body dispersed into 15 portions passes through the horizontal bulk plate 330 at the bottom end, it passes through the bottom end of the horizontal bulk plate 330. Each filtrate net 333 breaks up the water into liquid droplets. At the same time, the additive agent in the agent holding cylinder 31 is atomized through the atomizing disk 32 and collides with the relatively dripping liquid droplets to remove organic matter in the groundwater. After the treatment is completed, the purified water body is tested by the water quality detector 420 to see whether the purified water body meets the discharge standard. The air quality detector 341 monitors the gas composition of the treated tail gas flowing out of the mixing treatment cylinder 30 in real time. The gas that does not meet the environmental protection standard is re-treated through the gas circulation pipe 340.

[0049] S3. When the discharge standard is reached, the water falls into the corresponding injection well 2 through each external circulation injection pipe 42 and flows back into the groundwater. When the discharge standard is not reached, the water body is discharged into the pumping well 1 through the internal circulation injection pipe 43 and falls into the bottom area of ​​the pumping well 1. Then, it is re-pumped to the mixing treatment cylinder 30 for treatment.

[0050] Example 3

[0051] This embodiment differs from embodiment 1 in that:

[0052] like Figure 3 、 4 As shown in Figures 5 and 6, a vent pipe 400 is provided on the outer wall of the water pumping pipe 40, and one end of the vent pipe 400 is connected to an air compressor 401, and the other end is connected to an aeration ring 402. The center of the aeration ring 402 is connected to the bottom end of the outer wall of the water pumping pipe 40 through four first connecting rods 403. The bottom end of the aeration ring 402 is evenly provided with 15 aeration holes 404 along the circumference. Aeration is performed through each aeration hole 404 on the aeration ring 402, which significantly increases the dissolved oxygen content at the bottom end of the water pumping pipe 40. The increase in dissolved oxygen is crucial for the activity of aerobic microorganisms. These microorganisms can decompose organic pollutants in water and improve the treatment effect of groundwater. Among them, the air compressor 401 and the aeration ring 402 both adopt existing technologies;

[0053] The inner wall of the pumping well 1 is evenly provided with three reinforcement rings 10 movably connected to the outer wall of the pumping pipe 40 from top to bottom. The bottom end of the outer wall of the pumping pipe 40 and the outer periphery of the aeration ring 401 are connected to a pyrolysis ring 11 through four second connecting rods 100. The bottom end of the pyrolysis ring 11 is evenly provided with four heating rods 12 distributed in a divergent shape along the circumferential direction. The reinforcement ring 10 is movably connected to the outer wall of the pumping pipe 40. On the one hand, it effectively increases the stability of the well wall of the pumping well 1 and avoids damage or collapse of the well wall due to external forces. On the other hand, it can support the pumping pipe 40, limit the vibration of the pumping pipe 40, and keep its position stable in the pumping well 1. Heating the water at the bottom end of the pumping pipe 40 by the heating rods 12 can increase the temperature of the water, thereby accelerating the pyrolysis process and promoting the decomposition of pollutants. The heating rods 12 and the reinforcement ring 10 adopt existing technology.

[0054] The bottom end of the pyrolysis ring 11 is provided with a mounting port 110 which corresponds to the heating rod 12 and is hinged. The inner wall of the pyrolysis ring 11 is connected with a mounting cylinder 111 with an upper and lower opening structure. Each heating rod 12 is connected to the mounting cylinder 111 by two hinged third connecting rods 112. The two third connecting rods 112 are connected by a first hydraulic cylinder 113. The upper end of the second connecting rod 100 is hinged to the outer wall of the water pumping pipe 40, and the outer wall of the second connecting rod 100 is connected to the water pumping pipe 40 by a second hydraulic cylinder 44. When the angle of each heating rod 12 needs to be adjusted, the extension and compression of the first hydraulic cylinder 113 causes the angle between the two third connecting rods 112 to change, and the corresponding heating rod 12 will also rotate, so as to achieve the purpose of adjusting the heating rod 12. Adjusting the angle of the heating rod can optimize the distribution of heat energy in the water body, ensure that heat is evenly transferred to the area to be treated, and reduce energy waste. Among them, the first hydraulic cylinder 113 and the second hydraulic cylinder 44 both adopt existing technology;

[0055] A heat-conducting shell 120 is provided on the outer wall of the heating rod 12. The material of the heat-conducting shell 120 is titanium alloy. The purpose of providing the heat-conducting shell 120 is to ensure the heat conduction of the heating rod 12 in the contaminated groundwater. The heat-conducting shell 120 made of titanium alloy has corrosion resistance, which can prevent it from being corroded and damaged by various corrosive chemicals in the groundwater, thereby ensuring its service life.

[0056] Example 4

[0057] This embodiment differs from embodiment 2 in that:

[0058] In step S1, when contaminated groundwater is extracted, external air is drawn in by an air compressor 401 and passed through aeration pipe 400 into aeration ring 402. Aeration is then performed through various aeration holes 404 on aeration ring 402, significantly increasing the dissolved oxygen content at the bottom of the extraction pipe 40. The increase in dissolved oxygen is crucial for the activity of aerobic microorganisms, which can decompose organic pollutants in the water.

[0059] In step S1, heating the water at the bottom of the water pumping pipe 40 by the heating rod 12 can increase the temperature of the water, thereby accelerating the pyrolysis process. When it is necessary to adjust the angle of each heating rod 12, the angle between the two third connecting rods 112 changes through the extension and compression of the first hydraulic cylinder 113, and the corresponding heating rod 12 will also rotate, thereby achieving the purpose of adjusting the heating rod 12.

Claims

1. An organic contaminated groundwater extraction and treatment equipment, characterized in that: The invention comprises a pumping well (1), a plurality of injection wells (2) uniformly distributed along the circumference around the pumping well (1), a reagent mixing treatment component (3) provided at the pumping well (1), an extraction circulation component (4) for connecting the pumping well (1) and each of the injection wells (2), and an electrode treatment component (5) provided between the pumping well (1) and the injection well (2); The medicine mixing and processing assembly (3) comprises a mixing and processing cylinder (30), a medicine containing cylinder (31) connected to the mixing and processing cylinder (30), an atomizing disk (32) provided at the bottom end of the mixing and processing cylinder (30), and a hollow liquid dispersion rack (33) provided at the upper end of the mixing and processing cylinder (30) and distributed opposite to the atomizing disk (32). The atomizing disk (32) and the medicine containing cylinder (31) are connected via a connecting pipe, and the upper end of the mixing and processing cylinder (30) is connected to an exhaust gas processor (34) via a connecting pipe. The extraction circulation assembly (4) comprises a water pumping pipe (40) for connecting the hollow bulk liquid rack (33) and the water pumping well (1), the bottom end of which extends into the groundwater layer, a water pump (41) connected to the water pumping pipe (40), a plurality of external circulation water injection pipes (42) for connecting the reagent mixing treatment cylinder (3) and each water injection well (2), the connection points of which are provided with a water quality detector (420), and an internal circulation water injection pipe (43) provided on each of the external circulation water injection pipes (42), extending to the contaminated soil layer and penetratingly connected to the side wall of the water pumping well (1); The electrode treatment assembly (5) comprises an anode well (50) provided between a pumping well (1) and an injection well (2) located upstream, a cathode well (51) provided between the pumping well (1) and the injection well (2) located downstream, an anode plate (52) provided in the anode well (50), a cathode plate (53) provided in the cathode well (51), and a power supply (54) for connecting the anode plate (52) and the cathode plate (53); The outer wall of the water pumping pipe (40) is provided with a vent pipe (400), and one end of the vent pipe (400) is connected to an air compressor (401), and the other end is connected to an aeration ring (402), the center of the aeration ring (402) is connected to the bottom end of the outer wall of the water pumping pipe (40) through a plurality of first connecting rods (403), and the bottom end of the aeration ring (402) is evenly provided with a plurality of aeration holes (404) along the circumferential direction; The inner wall of the pumping well (1) is evenly provided with a plurality of reinforcement rings (10) that are movably connected to the outer wall of the pumping pipe (40) from top to bottom. The bottom end of the outer wall of the pumping pipe (40) and located outside the aeration ring (401) are connected to a pyrolysis ring (11) through a plurality of second connecting rods (100). The bottom end of the pyrolysis ring (11) is evenly provided with a plurality of heating rods (12) distributed in a divergent shape along the circumferential direction. The bottom end of the pyrolysis ring (11) is provided with a mounting opening (110) corresponding to the heating rod (12) and hinged, and the inner wall of the pyrolysis ring (11) is connected to a mounting cylinder (111) with an upper and lower opening structure. Each of the heating rods (12) and the mounting cylinder (111) is connected via two hinged third connecting rods (112), and the two third connecting rods (112) are connected via a first hydraulic cylinder (113). The upper end of the second connecting rod (100) is hinged to the outer wall of the water pumping pipe (40), and the outer wall of the second connecting rod (100) is connected to the water pumping pipe (40) via a second hydraulic cylinder (44).

2. The organic contaminated groundwater extraction and treatment equipment according to claim 1, characterized in that: The hollow liquid dispersion rack (33) comprises a plurality of horizontal liquid dispersion plates (330) distributed in parallel from top to bottom, a plurality of hollow liquid separation columns (331) arranged between two adjacent horizontal liquid dispersion plates (330), a plurality of liquid dispersion holes (332) arranged on the bottom wall of the bottommost horizontal liquid dispersion plate (330), and a filtrate net (333) arranged in each liquid dispersion hole (331).

3. The organic contaminated groundwater extraction and treatment equipment according to claim 2, characterized in that: The hollow liquid separation columns (331) located between the same two horizontal liquid dispersion plates (330) have the same diameter, and the diameters of the hollow liquid separation columns (331) distributed from top to bottom decrease in sequence.

4. The organic contaminated groundwater extraction and treatment equipment according to claim 1, characterized in that: The outer wall of the heating rod (12) is provided with a heat-conducting outer shell (120), and the material of the heat-conducting outer shell (120) is titanium alloy.

5. The organic contaminated groundwater extraction and treatment equipment according to claim 1, characterized in that: A gas circulation pipe (340) is connected between the gas outlet and the gas inlet of the tail gas processor (34), and an air quality detector (341) is provided at the gas outlet of the tail gas processor (34).

6. A method for extracting and treating organically contaminated groundwater, based on the organically contaminated groundwater extraction and treatment equipment according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Power is supplied to the anode plate (52) and the cathode plate (53) through the power supply (54). Positively charged ions in the soil above the groundwater move toward the cathode plate (53) and are concentrated in the area near the cathode plate (53); negatively charged ions move toward the anode plate (52) and are concentrated in the area near the anode plate (52), thereby achieving the purpose of removing pollutants in the soil. S2, start the water pump (41), and pump the contaminated groundwater through the water pump (41) to the upper end of the hollow liquid dispersion rack (33) through the water pump (41), and break the contaminated groundwater into liquid droplets through the hollow liquid dispersion rack (33). At the same time, the additive agent in the agent holding cylinder (31) is atomized through the atomizing disk (32), and collides with the relatively dripping liquid droplets to remove organic matter in the groundwater. After the treatment is completed, the purified water body is tested by the water quality detector (420) to determine whether the purified water body meets the discharge standard. The tail gas generated after the treatment is treated by the tail gas processor (34) and then discharged; S3. When the discharge standard is reached, the water falls into the corresponding water injection well (2) through each external circulation water injection pipe (42) and flows back into the groundwater. When the discharge standard is not reached, the water body is discharged into the pumping well (1) through the internal circulation water injection pipe (43) and falls into the bottom area of ​​the pumping well (1). Then, it is pumped back to the mixing treatment cylinder (30) for treatment.

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