Nanometer bubble sine wave boundary management and control well for in-production enterprises

Abstract

The invention relates to the technical field of pollution management and control equipment, and discloses a nanobubble sine wave boundary management and control well for in-production enterprises, which comprises a plurality of groups of underground management and control wells and an overground treatment device, a second sieve pore area and a third sieve pore area are sequentially arranged on the side wall of the underground management and control well from top to bottom, a blocking device is arranged in the underground management and control well and is arranged between the second sieve pore area and the third sieve pore area, and the underground management and control well above the blocking device is connected with a liquid inlet of the overground treatment device through a water pumping pipe; and a liquid outlet of the overground treatment device is connected with an underground management and control well below the obstructing device through a water injection pipe. According to the method, the disturbance of a control project to underground water can be reduced by means of various measures such as low water pumping amount, balance between the water pumping amount and the water injection amount, original underground water runoff and the like, the indigenous microorganisms in the stratum can be cultured by using the nano bubbles with long retention time, and the in-situ remediation effect on soil and underground water is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pollution control equipment, and in particular to a nanobubble sine wave boundary control well for an in-production enterprise. Background Art

[0002] Due to its industry characteristics, the petrochemical industry inevitably has pipeline leakage, equipment and facility leakage, tank cleaning and maintenance leakage, etc., which lead to high pollution of soil and groundwater. Pollutants migrate under the disturbance of groundwater flow field dynamics and cause serious damage to human health and the surrounding ecological environment through exposure routes such as inhalation of organic gas volatilization, direct or indirect contact and ingestion.

[0003] Therefore, enterprises often use heat treatment, redox, biological and other ex situ remediation or in situ remediation technologies to remove pollutants from soil and groundwater in contaminated sites, and reduce or eliminate hazards to humans and the environment. However, as an important economic contribution point in my country, the traditional relocation and remediation ideas of petrochemical sites are costly and have a long relocation cycle, which will cause long-term and serious economic damage; other technologies require groundwater extraction and treatment, which is limited by the treatment capacity of water treatment facilities in petrochemical parks on the one hand, and large-scale pumping causes changes in the stratum structure, and there will be wind directions such as foundation settlement, and when the number of monitoring wells is limited, pumping activities will cause underground pollution plumes to move, which will bring uncertainty; and when traditional bioremediation technology injects the repair fluid, it needs to dilute the repair fluid 100 times and use high pressure to promote the diffusion of the repair fluid in the stratum, which has the disadvantages of large injection volume, large disturbance and small impact range. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention develops a nanobubble chord wave boundary control well for use in producing enterprises. The present invention can reduce the disturbance of groundwater caused by the control project by a variety of measures such as lower pumping volume, balance of pumping volume and injection volume, and reliance on the original groundwater runoff, thereby reducing the risk of sedimentation and uncertainty, and can also use nanobubbles with a high residence time to cultivate indigenous microorganisms in the strata, establish a chord wave control well belt at the boundary of the control area of ​​the petrochemical park, prevent pollution from spilling over at a lower cost, and effectively improve the in-situ remediation effect of soil and groundwater.

[0005] The technical solution to the technical problem solved by the present invention is: a nanobubble string wave boundary control well for an in-production enterprise, comprising a plurality of groups of underground control wells and an above-ground processing device, wherein the underground control wells are linearly distributed along the groundwater runoff direction, and a second sieve hole area and a third sieve hole area are sequentially arranged on the side wall of the underground control well from top to bottom, and an isolator is arranged in the underground control well, and the isolator is arranged between the second sieve hole area and the third sieve hole area, the underground control well above the isolator is connected to the liquid inlet of the above-ground processing device through a pumping pipe, and the liquid outlet of the above-ground processing device is connected to the underground control well below the isolator through a water injection pipe.

[0006] As an optimization, the opening direction of the second sieve hole area faces the direction of the groundwater flow, which can facilitate the flow of groundwater. The circumferential opening angle of the second sieve hole area is 90°~180°, which can expand the traction range of groundwater. The opening direction of the third sieve hole area is back to the direction of the groundwater flow, which can facilitate the outflow of bubble water and mix with groundwater and prevent groundwater from blocking the third sieve hole area. The circumferential opening angle of the third sieve hole area is 90°~180°, which can expand the outflow range of bubble water and better mix and diffuse with groundwater.

[0007] As an optimization, the above-ground treatment device includes a first negative pressure tank and a groundwater treatment device. The underground control well above the barrier is connected to the liquid inlet of the first negative pressure tank through a pumping pipe, the liquid outlet of the first negative pressure tank is connected to the liquid inlet of the groundwater treatment device through a liquid phase pump, and the liquid outlet of the groundwater treatment device is connected to the underground control well below the barrier through an injection pipe. By setting up the first negative pressure tank, negative pressure can be generated to draw the upstream groundwater into the underground control well through the sieve holes in the second sieve hole area, and the groundwater can be pumped out through the pumping pipe to form two parts, liquid and gas phases; by setting up a liquid phase pump, the liquid phase in the first negative pressure tank can be transported to the groundwater treatment device for treatment; by setting up the groundwater treatment device, contaminated groundwater can be treated.

[0008] As an optimization, the groundwater treatment device includes a first air compressor, a first VOCs treatment equipment, a flotation biological filter box, a high dissolved oxygen nano bubble making machine and a temporary storage tank. The air outlet of the first negative pressure tank is connected to the first VOCs treatment equipment through the first air compressor, the liquid outlet of the first negative pressure tank is connected to the liquid inlet of the flotation biological filter box through a liquid phase pump, the liquid outlet of the flotation biological filter box is connected to the liquid inlet of the high dissolved oxygen nano bubble making machine through a water pipe, the liquid outlet of the high dissolved oxygen nano bubble making machine is connected to the liquid inlet of the temporary storage tank through a water pipe, and the liquid outlet of the temporary storage tank is connected to the other end of the water injection pipe. By setting up the first air compressor, the gas phase in the first negative pressure tank can be transported to the first VOCs treatment equipment for treatment; by setting up the flotation biological filter box, the suspended matter and organic matter in the liquid phase can be filtered, retained and biodegraded, so that the content of organic matter, ammonia nitrogen and the like in the liquid phase is reduced; by setting up a high dissolved oxygen nano bubble making machine, high dissolved oxygen nano bubble water can be produced. The high dissolved oxygen nano bubble particles are small and the surface is negatively charged. They can pass through the soil gaps and can effectively combine with pollutants, drive the pollutants to float, and cause chemical reactions such as oxidation, thereby providing oxygen for the oxygen consumption metabolism of microorganisms in the soil and groundwater. The bubbles are small and can come into contact with more microorganisms to provide oxygen for large-scale microorganisms; by setting up a temporary storage tank, the high dissolved oxygen nano bubble water can be temporarily stored so that it can be injected back into the underground control well below the barrier under the action of gravity.

[0009] As an optimization, the groundwater treatment device also includes a dispensing device, the liquid outlet of the dispensing device is connected to the drug inlet of the air-floating biological filter box and the temporary storage tank through a drug liquid pipe. By setting up the dispensing device, the concentrated biological nutrient solution can be transported to the air-floating biological filter box and the temporary storage tank.

[0010] As an optimization, a first manhole cover is provided at the top of the underground control well. The first manhole cover is provided with a pressure gauge, a liquid level gauge and an inspection port. The detection ends of the pressure gauge and the liquid level gauge are both provided inside the underground control well. By providing the first manhole cover, the underground control well can be sealed; by providing the pressure gauge, the air pressure inside the well can be detected; by providing the liquid level gauge, the liquid level above the barrier inside the well can be detected; and by providing the inspection port, it is convenient for the staff to observe the situation inside the well.

[0011] As an optimization, the pumping pipe includes a main pumping pipe and several groups of pumping branch pipes, one end of the pumping branch pipe is arranged in an underground control well above the barrier, and the other end of the pumping branch pipe is connected to the liquid inlet of the first negative pressure tank through the main pumping pipe. The injection pipe includes a main injection pipe and several groups of injection branch pipes, one end of the injection branch pipe is arranged in the underground control well below the barrier, and the other end of the injection branch pipe is connected to the liquid outlet of the groundwater treatment device through the main injection pipe. Flow meters and flow regulating valves are provided on the pumping branch pipe and the injection branch pipe. By setting up a main water pumping pipe and a branch water pumping pipe, groundwater from various underground control wells can be easily extracted and mixed in the first negative pressure tank. After the low-pollution water in the downstream underground control well is mixed with the high-pollution water in the upstream underground control well, the maximum pollution value of the water is reduced, so that the design scale of the subsequent flotation biological filter box can be reduced, and the manufacturing cost of the entire ground system can be reduced; by setting up a main water injection pipe and a branch water injection pipe, the bubble water can be conveniently injected into various underground control wells respectively, and by setting up a flow meter and a flow regulating valve, the pumping amount and the injection amount can be detected. The control system can adjust the flow regulating valve according to the flow of the flow meter, so as to achieve a pumping and injection balance without changing the total amount of groundwater, and the control system can switch the flow regulating valve of the corresponding underground control well according to the detection data of the liquid level meter to avoid causing the nearby groundwater level to be too low.

[0012] As an optimization, a first sieve hole area is also provided on the side wall of the underground control well, and the first sieve hole area is arranged above the second sieve hole area. By setting the first sieve hole area, the gas generated by the oxygen consumption metabolism of microorganisms and some undecomposed VOCs can enter the underground control well.

[0013] As an optimization, it also includes a gas extraction well, a second negative pressure tank, a second air compressor and a second VOCs treatment equipment. The gas extraction well and the underground control well are staggered. The gas extraction well and the underground control well are connected to the air inlet of the second negative pressure tank through an exhaust pipe, and the air outlet of the second negative pressure tank is connected to the second VOCs treatment equipment through the second air compressor. By setting up the gas extraction well and the fourth sieve area, the gas produced by the oxygen consumption metabolism of microorganisms in groundwater and soil and some undecomposed VOCs can be further collected; by setting up the second negative pressure tank, the gas in the underground control well and the gas extraction well can be sucked under negative pressure; by setting up the second air compressor, the gas in the second negative pressure tank can be transported to the second VOCs treatment equipment for treatment, so as to achieve water and soil co-control.

[0014] As an optimization, the exhaust pipe includes an exhaust main pipe and several groups of exhaust branches. The underground control wells and gas phase extraction wells are connected to the exhaust main pipe through the exhaust branches, and the exhaust main pipe is connected to the air inlet of the second negative pressure tank. By setting up the exhaust main pipe and the exhaust branch pipe, it is convenient to extract the gas in each underground control well and gas phase extraction well.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, by setting up underground control wells and ground treatment devices, groundwater can be easily extracted, and the contaminated groundwater can be repaired and treated into bubble water carrying biological liquid, and then re-injected into the ground; by setting up the second sieve hole area, the upper groundwater can flow into the underground control well, which is convenient for the ground treatment device to extract; by setting up the third sieve hole area, the bubble water repaired and treated by the ground treatment device can flow into the deep groundwater; by setting up the barrier, the underground control well can be divided into upper and lower parts, and the pumping and injection processes can be separated independently, which can not only avoid the ground treatment device directly extracting the injected bubble water, but also balance the pumping and injection volumes, reducing the risk of sedimentation and uncertainty risks;

[0017] Second, after the bubble water flows from the third sieve hole area into the deep groundwater, it moves forward and diffuses with the groundwater, gradually floats up driven by density, and is finally pulled back into the underground control well by the second sieve hole area of ​​the downstream underground control well, so that the bubble water relies on the original groundwater runoff and moves forward in a sinusoidal waveform, reducing the disturbance of the control project to the groundwater, and can remove groundwater pollution in situ. Moreover, the sine wave flow does not form a priority channel, and can penetrate strata with different permeability coefficients, and has a good penetration effect on low-permeability areas that are prone to accumulation of pollution.

[0018] Third, during the floating process of the bubble water, the highly dissolved oxygen contained in it is gradually released. Under the influence of the nutrient solution and oxygen, the indigenous microorganisms are able to grow and reproduce in large quantities, rapidly consume oxygen and metabolize, reduce the concentration of pollutants such as benzene, toluene, and phenol, and achieve a control effect. There is no change in the biological species of the biological ecology, and with the diffusion of groundwater, a large range of microbial growth and reproduction areas are formed, which can form a continuous control effect, and can prevent pollutants in the factory area from overflowing from here to the factory boundary. The present invention can reduce the disturbance of groundwater by the control project with a lower pumping volume, a balance between the pumping volume and the injection volume, and rely on the original groundwater runoff and other measures, reduce the risk of sedimentation and uncertainty, and can also use nanobubbles with a high residence time to cultivate indigenous microorganisms in the stratum, establish a chord wave control well belt at the boundary of the control area of ​​the petrochemical park, and achieve pollution without spillover at a lower cost, effectively improving the in-situ remediation effect of soil and groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of an embodiment of the present invention.

[0020] In the figure: 1. underground control well; 2. first sieve hole area; 3. second sieve hole area; 4. third sieve hole area; 5. barrier; 6. first negative pressure tank; 7. liquid phase pump; 8. first air compressor; 9. first VOCs treatment equipment; 10. flotation biofilter; 11. high dissolved oxygen nano bubble maker; 12. temporary storage tank; 13. dispensing device; 14. first manhole cover; 15. main pumping pipe; 16. branch pumping pipe; 17. main water injection pipe; 18. branch water injection pipe; 19. flow meter; 20. flow regulating valve; 21. gas extraction well; 22. second negative pressure tank; 23. second air compressor; 24. second VOCs treatment equipment; 25. main exhaust pipe; 26. exhaust branch pipe. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0022] Figure 1 As an embodiment of the present invention, Figure 1 As shown, a nanobubble string wave boundary control well for an in-production enterprise includes several groups of underground control wells 1. The underground control wells 1 are made of UPVC, PVC or stainless steel, which can be determined according to the corrosiveness of pollutants and the expected life of the construction. It also includes an above-ground treatment device. The underground control wells 1 are linearly distributed along the groundwater runoff direction. The side walls of the underground control wells 1 are provided with a second sieve hole area 3 and a third sieve hole area 4 from top to bottom. The second sieve hole area 3 is set at the groundwater level. A barrier 5 is provided in the underground control well 1. The barrier 5 is set between the second sieve hole area 3 and the third sieve hole area 4. The underground control well 1 above the barrier 5 is connected to the liquid inlet of the above-ground treatment device through a pumping pipe, and the liquid outlet of the above-ground treatment device is connected to the underground control well 1 below the barrier 5 through a water injection pipe.

[0023] By setting up an underground control well 1 and a ground treatment device, groundwater can be easily extracted, and the contaminated groundwater can be repaired and treated into bubble water carrying biological liquid, and then re-injected into the ground; by setting up the second sieve hole area 3, the upper groundwater can flow into the underground control well 1, which is convenient for the ground treatment device to extract; by setting up the third sieve hole area 4, the bubble water repaired and treated by the ground treatment device can flow into the deep groundwater; by setting up the barrier 5, the underground control well 1 can be divided into upper and lower parts, and the pumping and injection processes can be separated independently, which can not only avoid the ground treatment device directly extracting and injecting bubble water, but also balance the pumping and injection volumes, and reduce the risk of sedimentation and uncertainty risks; after the bubble water flows into the deep groundwater from the third sieve hole area 4, it moves forward and diffuses with the groundwater, and gradually floats up driven by density, and finally It is then pulled by the second sieve hole area 3 of the downstream underground control well 1 to re-enter the underground control well 1, so that the bubble water relies on the original groundwater runoff and advances in a sinusoidal waveform, reducing the disturbance of the control project to the groundwater, and can remove groundwater pollution in situ. The sine wave flow does not form a priority channel, and can penetrate strata with different permeability coefficients, and has a good penetration effect on low permeability areas that are prone to accumulation of pollution. In the process of the bubble water floating up, the highly dissolved oxygen it contains is gradually released. Under the influence of nutrient solution and oxygen, indigenous microorganisms are able to grow and multiply in large numbers, rapidly consume oxygen and metabolize, reducing the concentrations of pollutants such as benzene, toluene, and phenol, achieving the control effect, without any changes in the biological species of the biological ecology, and with the diffusion of groundwater, a large range of microbial growth and reproduction areas are formed, which can form a sustainable control effect, and can prevent pollutants in the factory area from overflowing from here to the factory boundary.

[0024] The opening direction of the second sieve hole area 3 faces the direction of the groundwater flow, which can facilitate the groundwater to flow in. The circumferential opening angle of the second sieve hole area 3 is any one of 90°, 120°, 125°, 150° and 180°, which can expand the traction range of the groundwater. The opening direction of the third sieve hole area 4 is opposite to the direction of the groundwater flow, which can facilitate the outflow of bubble water and mix with groundwater and prevent groundwater from blocking the third sieve hole area 4. The circumferential opening angle of the third sieve hole area 4 is 90° or 120°, which can expand the outflow range of bubble water and better mix and diffuse with groundwater.

[0025] The above-ground treatment device includes a first negative pressure tank 6 and a groundwater treatment device. The underground control well 1 above the barrier 5 is connected to the liquid inlet of the first negative pressure tank 6 through a pumping pipe, the liquid outlet of the first negative pressure tank 6 is connected to the liquid inlet of the groundwater treatment device through a liquid phase pump 7, and the liquid outlet of the groundwater treatment device is connected to the underground control well 1 below the barrier 5 through a water injection pipe. By setting the first negative pressure tank 6, negative pressure can be generated to draw the upstream groundwater into the underground control well 1 through the sieve holes of the second sieve hole area 3, and the groundwater can be pumped out through the pumping pipe to form two parts, liquid phase and gas phase; by setting the liquid phase pump 7, the liquid phase in the first negative pressure tank 6 can be transported to the groundwater treatment device for treatment; by setting the groundwater treatment device, contaminated groundwater can be treated.

[0026] The groundwater treatment device includes a first air compressor 8, a first VOCs treatment equipment 9, a flotation biological filter box 10, a high dissolved oxygen nano bubble making machine 11 and a temporary storage tank 12. The air outlet of the first negative pressure tank 6 is connected to the first VOCs treatment equipment 9 through the first air compressor 8, the liquid outlet of the first negative pressure tank 6 is connected to the liquid inlet of the flotation biological filter box 10 through the liquid phase pump 7, the liquid outlet of the flotation biological filter box 10 is connected to the liquid inlet of the high dissolved oxygen nano bubble making machine 11 through a water pipe, the liquid outlet of the high dissolved oxygen nano bubble making machine 11 is connected to the liquid inlet of the temporary storage tank 12 through a water pipe, and the liquid outlet of the temporary storage tank 12 is connected to the other end of the water injection pipe. By setting up the first air compressor 8, the gas phase in the first negative pressure tank 6 can be transported to the first VOCs treatment equipment 9 for treatment; by setting up the flotation biological filter box 10, the suspended matter and organic matter in the liquid phase can be filtered, retained and biodegraded, so that the content of organic matter, ammonia nitrogen, etc. in the liquid phase is reduced; by setting up the high dissolved oxygen nano bubble manufacturing machine 11, high dissolved oxygen nano bubble water can be produced. The high dissolved oxygen nano bubble particles are small and the surface is negatively charged. They can pass through the soil gaps and can effectively combine with pollutants, drive the pollutants to float, and cause chemical reactions such as oxidation, thereby providing oxygen for the oxygen consumption metabolism of microorganisms in the soil and groundwater. The bubbles are small and can contact more microorganisms to provide oxygen for large-scale microorganisms; by setting up the temporary storage tank 12, the high dissolved oxygen nano bubble water can be temporarily stored so that it can be injected back into the underground control well 1 below the barrier 5 under the action of gravity.

[0027] The groundwater treatment device also includes a dispensing device 13, the liquid outlet of the dispensing device 13 is connected to the drug inlet of the air-floating biological filter box 10 and the temporary storage tank 12 through a drug liquid pipe. By providing the dispensing device 13, the concentrated biological nutrient solution can be transported to the air-floating biological filter box 10 and the temporary storage tank 12.

[0028] A first manhole cover 14 is provided on the top of the underground control well 1. A pressure gauge, a liquid level gauge and an inspection port are provided on the first manhole cover 14. The detection ends of the pressure gauge and the liquid level gauge are both provided inside the underground control well 1. By providing the first manhole cover 14, the underground control well 1 can be sealed; by providing the pressure gauge, the air pressure in the well can be detected; by providing the liquid level gauge, the liquid level above the barrier 5 in the well can be detected; and by providing the inspection port, it is convenient for the staff to observe the situation in the well.

[0029] The water pumping pipe includes a main water pumping pipe 15 and a plurality of groups of water pumping branch pipes 16. One end of the water pumping branch pipe 16 is arranged in the underground control well 1 above the barrier 5. The other end of the water pumping branch pipe 16 is connected to the liquid inlet of the first negative pressure tank 6 through the main water pumping pipe 15. The water injection pipe includes a main water injection pipe 17 and a plurality of groups of water injection branch pipes 18. One end of the water injection branch pipe 18 is arranged in the underground control well 1 below the barrier 5. The other end of the water injection branch pipe 18 is connected to the liquid outlet of the groundwater treatment device through the main water injection pipe 17. The water pumping branch pipe 16 and the water injection branch pipe 18 are both provided with a flow meter 19 and a flow regulating valve 20. The flow rate in the water pumping branch pipe 16 is less than or equal to 5m 3 / h. By setting the main water pumping pipe 15 and the branch water pumping pipe 16, it is convenient to extract the groundwater from each underground control well 1 and uniformly mix it in the first negative pressure tank 6. After the low-pollution water in the downstream underground control well 1 is mixed with the high-pollution water in the upstream underground control well 1, the maximum pollution value of the water is reduced, so that the design scale of the subsequent air flotation biological filter box 10 can be reduced, and the manufacturing cost of the entire ground system can be reduced; by setting the main water injection pipe 17 and the branch water injection pipe 18, it is convenient to inject the bubble water into each underground control well 1 respectively, and by setting the flow meter 19 and the flow regulating valve 20, the pumping amount and the injection amount can be detected. The control system can adjust the flow regulating valve 20 according to the flow of the flow meter 19. The injection flow of the high dissolved oxygen nano bubble water containing biological agents in the same underground control well 1 is consistent with the groundwater extraction flow, so as to achieve the balance of pumping and injection, without changing the total amount of groundwater, and the control system can switch the flow regulating valve 20 of the corresponding underground control well 1 according to the detection data of the liquid level meter to avoid causing the nearby groundwater level to be too low.

[0030] The side wall of the underground control well 1 is also provided with a first sieve hole area 2, which is arranged above the second sieve hole area 3. The first sieve hole area 2 is arranged in the aeration zone, and the specific position and opening length of the sieve are determined according to the position and thickness of the aeration zone of the actual project. By setting the first sieve hole area 2, the gas generated by the oxygen consumption metabolism of microorganisms and some undecomposed VOCs can enter the underground control well 1.

[0031] It also includes a gas extraction well 21, a second negative pressure tank 22, a second air compressor 23 and a second VOCs treatment equipment 24. A second manhole cover is provided on the top of the gas extraction well 21. The gas extraction well 21 and the underground control well 1 are staggered. A fourth sieve hole area is provided at the bottom of the gas extraction well 21. The fourth sieve hole area is arranged in the air-containing zone. The gas extraction well 21 and the underground control well 1 are connected to the air inlet of the second negative pressure tank 22 through an exhaust pipe, and the air outlet of the second negative pressure tank 22 is connected to the second VOCs treatment equipment 24 through the second air compressor 23. By setting up the gas phase extraction well 21 and the fourth sieve hole area, the gases produced by the oxygen metabolism of microorganisms in groundwater and soil and some undecomposed VOCs can be further collected; by setting up the second negative pressure tank 22, the gases in the underground control well 1 and the gas phase extraction well 21 can be negatively pressured and sucked; by setting up the second air compressor 23, the gas in the second negative pressure tank 22 can be transported to the second VOCs treatment equipment 24 for treatment, thereby realizing water and soil co-control.

[0032] The exhaust pipe includes an exhaust main pipe 25 and several groups of exhaust branches 26. The underground control well 1 and the gas phase extraction well 21 are connected to the exhaust main pipe 25 through the exhaust branch pipe 26. The exhaust main pipe 25 is connected to the air inlet of the second negative pressure tank 22. The exhaust branch pipe 26 of the gas phase extraction well 21 is provided with a gas flow meter and a flow regulating valve to facilitate the control system to control the gas flow. By setting the exhaust main pipe 25 and the exhaust branch pipe 26, it is convenient to extract the gas in each underground control well 1 and the gas phase extraction well 21.

[0033] When in use, the ground in the park of the production enterprise is sealed with concrete, and the underground control well 1 and the gas phase extraction well 21 are linearly arranged at the control area boundary of the production enterprise in accordance with the groundwater runoff direction to form a control well belt. The upstream groundwater enters the underground control well 1 through the sieve holes of the second sieve hole area 3 under the negative pressure traction of the first negative pressure tank 6, and then enters the first negative pressure tank 6 through the pumping branch pipe 16 and the pumping main pipe 15, wherein the flow rate of the pumping branch pipe 16 is 1m 3 / h or 2m 3 / h, and when the liquid level detected by the liquid level meter is lower than the set minimum liquid level, the control system closes the flow regulating valve 20 on the corresponding pumping branch pipe 16 to avoid a high pumping volume, and the liquid phase is pumped into the air flotation biological filter box 10 through the liquid phase pump 7, and the suspended matter and organic matter in the liquid phase are filtered, intercepted and biodegraded, so that the content of organic matter, ammonia nitrogen, etc. in the liquid phase is reduced; then it enters the high dissolved oxygen nano bubble making machine 11, and after being made into high dissolved oxygen nano bubble water, it is transported to the temporary storage tank 12 for temporary storage and mixed with the biological agent transported to the temporary storage tank 12 by the dispensing device 13; finally, the bubble water is injected back into the underground control well 1 below the barrier 5 under the action of gravity, enters the downstream groundwater through the sieve holes of the third sieve hole area 4, and relies on the original groundwater runoff to advance and diffuse, and the bubble water gradually floats up under the drive of density, and is then pulled by the downstream underground control well 1, so as to advance in a sinusoidal waveform;

[0034] During the floating process of the bubble water, the highly dissolved oxygen contained in it is gradually released. Under the influence of the biological agent nutrient solution and oxygen, the indigenous microorganisms are able to grow and reproduce in large numbers, rapidly consume oxygen and metabolize, and reduce the concentrations of pollutants such as benzene, toluene, and phenol. The gases produced after the oxygen metabolism of the microorganisms and some undecomposed VOCs enter the soil in the aeration zone, and under the negative pressure of the second negative pressure tank 22, enter the underground control well 1 through the sieve holes of the first sieve hole area 2, and enter the gas phase extraction well 21 through the sieve holes of the fourth sieve hole area, and then enter the second negative pressure tank 22 through the exhaust branch pipe 26 and the exhaust main pipe 25. Finally, the gas phase enters the second VOCs treatment equipment 24 through the second air compressor 23 or directly enters the waste gas treatment system of the chemical park for treatment; it should be noted that the first negative pressure tank 6 also contains part of the gas phase, which enters the first VOCs treatment equipment 9 through the first air compressor 8 or directly enters the waste gas treatment system of the chemical park for treatment. The present invention can reduce the disturbance of groundwater caused by the control project by lower pumping volume, balance of pumping volume and injection volume, reliance on original groundwater runoff and other measures, reduce the risk of sedimentation and uncertainty, and cultivate indigenous microorganisms in the strata with high residence time nanobubbles, establish a chord wave control well belt at the boundary of the control area of ​​the petrochemical park, prevent pollution from spilling over at a lower cost, and effectively improve the in-situ remediation effect of soil and groundwater.

[0035] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A nanobubble sine wave boundary control well for an in-production enterprise, comprising a plurality of groups of underground control wells (1), characterized in that: It also includes an above-ground treatment device, wherein the underground control well (1) is linearly distributed along the groundwater runoff direction, and the side wall of the underground control well (1) is provided with a second sieve hole area (3) and a third sieve hole area (4) in sequence from top to bottom, and a barrier (5) is provided in the underground control well (1), and the barrier (5) is arranged between the second sieve hole area (3) and the third sieve hole area (4), and the underground control well (1) above the barrier (5) is connected to the liquid inlet of the above-ground treatment device through a pumping pipe, and the liquid outlet of the above-ground treatment device is connected to the underground control well (1) below the barrier (5) through a water injection pipe.

2. According to claim 1, a nanobubble sine wave boundary control well for an in-production enterprise is characterized by: The opening direction of the second sieve hole area (3) faces the direction of the groundwater flow, and the opening angle of the second sieve hole area (3) in the circumferential direction is 90° to 180°. The opening direction of the third sieve hole area (4) faces away from the direction of the groundwater flow, and the opening angle of the third sieve hole area (4) in the circumferential direction is 90° to 180°.

3. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 2 is characterized by: The above-ground treatment device comprises a first negative pressure tank (6) and a groundwater treatment device; an underground control well (1) above the barrier (5) is connected to the liquid inlet of the first negative pressure tank (6) via a pumping pipe; the liquid outlet of the first negative pressure tank (6) is connected to the liquid inlet of the groundwater treatment device via a liquid phase pump (7); and the liquid outlet of the groundwater treatment device is connected to the underground control well (1) below the barrier (5) via a water injection pipe.

4. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 3 is characterized by: The groundwater treatment device comprises a first air compressor (8), a first VOCs treatment equipment (9), an air-floating biological filter box (10), a high-dissolved oxygen nano-bubble manufacturing machine (11) and a temporary storage tank (12); the air outlet of the first negative pressure tank (6) is connected to the first VOCs treatment equipment (9) through the first air compressor (8); the liquid outlet of the first negative pressure tank (6) is connected to the liquid inlet of the air-floating biological filter box (10) through a liquid phase pump (7); the liquid outlet of the air-floating biological filter box (10) is connected to the liquid inlet of the high-dissolved oxygen nano-bubble manufacturing machine (11) through a water pipe; the liquid outlet of the high-dissolved oxygen nano-bubble manufacturing machine (11) is connected to the liquid inlet of the temporary storage tank (12) through a water pipe; and the liquid outlet of the temporary storage tank (12) is connected to the other end of the water injection pipe.

5. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 4 is characterized by: The groundwater treatment device also includes a drug dispensing device (13), the liquid outlet of the drug dispensing device (13) being connected to the drug inlets of the air-floating biological filter box (10) and the temporary storage tank (12) respectively through a drug liquid pipe.

6. According to claim 5, a nanobubble sine wave boundary control well for an in-production enterprise is characterized in that: A first manhole cover (14) is provided on the top of the control well (1), and a pressure gauge, a liquid level gauge and an inspection port are provided on the first manhole cover (14), and detection ends of the pressure gauge and the liquid level gauge are both arranged inside the underground control well (1).

7. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 6 is characterized by: The water pumping pipe comprises a main water pumping pipe (15) and a plurality of groups of water pumping branch pipes (16); one end of the water pumping branch pipe (16) is arranged in an underground control well (1) above the barrier (5); the other end of the water pumping branch pipe (16) is connected to the liquid inlet of the first negative pressure tank (6) through the main water pumping pipe (15); the water injection pipe comprises a main water injection pipe (17) and a plurality of groups of water injection branch pipes (18); one end of the water injection branch pipe (18) is arranged in the underground control well (1) below the barrier (5); the other end of the water injection branch pipe (18) is connected to the liquid outlet of the groundwater treatment device through the main water injection pipe (17); and flow meters (19) and flow regulating valves (20) are provided on the water pumping branch pipe (16) and the water injection branch pipe (18).

8. A nanobubble sine wave boundary control well for an in-production enterprise according to any one of claims 1 to 7, characterized in that: A first sieve hole area (2) is also provided on the side wall of the control well (1), and the first sieve hole area (2) is arranged above the second sieve hole area (3).

9. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 8 is characterized by: It also includes a gas phase extraction well (21), a second negative pressure tank (22), a second air compressor (23) and a second VOCs treatment device (24); the gas phase extraction well (21) and the underground control well (1) are arranged alternately; the gas phase extraction well (21) and the underground control well (1) are both connected to the air inlet of the second negative pressure tank (22) through an extraction pipe; and the air outlet of the second negative pressure tank (22) is connected to the second VOCs treatment device (24) through the second air compressor (23).

10. The nanobubble sine wave boundary control well for an in-production enterprise according to claim 9, characterized in that: The exhaust pipe comprises an exhaust main pipe (25) and a plurality of exhaust branch pipes (26); the underground control well (1) and the gas phase extraction well (21) are connected to the exhaust main pipe (25) via the exhaust branch pipes (26); and the exhaust main pipe (25) is connected to the air inlet of the second negative pressure tank (22).

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