Low-temperature airflow improved underground water pollution air disturbance technology interception barrier system

Abstract

The invention relates to the technical field of groundwater pollution control and remediation, in particular to a low-temperature airflow improved groundwater pollution air disturbance technical interception barrier system which comprises at least two refrigeration cycle mechanisms, a low-temperature airflow control system, a low-temperature airflow control system and a low-temperature airflow control system. Each refrigeration cycle mechanism comprises a first air compressor, a condenser, a liquid gas tank, a refrigeration pipe, a reflux valve and a water-gas separator, the output end of the first air compressor is communicated with the input end of the condenser, and the output end of the condenser is communicated with the liquid gas tank; the complex construction process of building a blocking wall on a large scale in a traditional blocking technology is avoided, so that the construction period is shortened, the cost is reduced, meanwhile, the influence of stratum disturbance on the blocking effect is reduced, and the technology has the advantages of being easy to operate, high in efficiency and small in damage to the stratum; and meanwhile, physical interception can be achieved for the extreme underground water polluted stratum.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater pollution control and restoration, and in particular to a low-temperature airflow-improved groundwater pollution air disturbance interception barrier system. Background Art

[0002] Groundwater pollution barrier technology prevents the migration and spread of contaminated groundwater and blocks the diffusion of gases emitted from contaminated soil or contaminated groundwater by constructing vertical barrier systems such as underground ditches, ground walls or ground membranes around the contaminated medium.

[0003] Existing barrier technologies can be divided into grouting barrier walls, mud barrier walls and geomembrane composite barrier walls according to the barrier wall construction method and materials. The barrier materials directly affect the interception effect of pollutants, and the stratum disturbance will also damage the barrier materials. However, it has the problems of complex operation, low efficiency, great damage to the stratum, long construction period and high construction cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the existing barrier technology, which can be divided into grouting interception wall, mud interception wall and geomembrane composite interception wall according to the construction method and material of the barrier wall. The interception material directly affects the interception effect of pollutants, and the stratum disturbance will also damage the interception material. However, it has the problems of complex operation, low efficiency, great destructiveness to the stratum, long construction period and high construction cost. A low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system is now provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a low-temperature airflow improved groundwater pollution air disturbance technical interception barrier system, comprising:

[0006] At least two refrigeration cycle mechanisms, which enclose the underground contaminated area in the middle, each of the refrigeration cycle mechanisms includes a first air compressor, a condenser, a liquid gas tank, a refrigeration pipe, a reflux valve and a water-gas separator, the output end of the first air compressor is connected to the input end of the condenser, the output end of the condenser is connected to the liquid gas tank, the liquid gas tank is connected to one end of the refrigeration pipe, the other end of the refrigeration pipe is connected to one end of the refrigeration valve, the refrigeration pipe is located in the underground aquifer, the other end of the reflux valve is connected to the input end of the water-gas separator, the output end of the water-gas separator is connected to the liquid gas tank, the refrigeration pipe is U-shaped, and an aeration mechanism is arranged in the middle of the refrigeration pipe;

[0007] A medicine injection mechanism is arranged on one side of the refrigeration cycle mechanism and is arranged one-to-one with the medicine injection mechanism, the medicine injection mechanism includes a medicine injection well, one end of the medicine injection well protrudes from the bottom surface, the other end of the medicine injection well is inserted into the underground aquifer, the medicine injection well is provided with a medicine outlet hole, the medicine outlet hole is located in the underground aquifer, one end of the medicine injection well is connected to the output end of the medicine filling pump, and the input end of the medicine filling pump is connected to the medicine dispensing tank;

[0008] And a gas phase extraction mechanism, which is arranged corresponding to the reagent injection mechanism, the gas phase extraction mechanism includes an air well, an air pump, a reaction box and an activated carbon adsorption tank which are sealed up and down, the upper end of the air well protrudes from the bottom surface, the lower end of the air well is arranged underground and located above the underground aquifer, the air well is connected to the input end of the air pump, the output end of the air pump is connected to the inside of the reaction box, the reaction box is connected to the activated carbon adsorption tank, and the activated carbon adsorption tank is connected to the outside. Compared with the prior art, the low-temperature airflow improved groundwater air disturbance technology of this scheme avoids the complex construction process of large-scale construction of barrier walls in traditional barrier technology through the synergistic mechanism of low-temperature airflow injection and air disturbance technology, thereby shortening the construction period and reducing costs, while reducing the impact of formation disturbance on the interception effect. This technology has the advantages of simple operation, high efficiency and less destructiveness to the formation, and can also achieve physical interception for extremely groundwater contaminated formations.

[0009] In order to realize the aeration mechanism, some preferred embodiments are that the aeration mechanism includes a first aeration well with closed ends and a second air compressor, one end of the first aeration well is inserted into the underground aquifer, the first aeration well is located in the middle of the refrigeration pipe, a first aeration head is provided on the first aeration well, and the output end of the second air compressor is connected to the first aeration well.

[0010] In some preferred embodiments, a plurality of first aeration heads are spaced apart along the axial direction of the aeration well, and a solenoid valve is provided between each of the first aeration heads and the first aeration well.

[0011] In some preferred embodiments, a plurality of air extraction wells are arranged around the refrigeration cycle mechanism.

[0012] In some preferred embodiments, the underground contaminated area is provided with a gas phase extraction mechanism.

[0013] In order to enhance the refrigeration effect of the refrigeration cycle mechanism, in some preferred embodiments, the refrigeration cycle mechanism further comprises a second aeration well, one end of the second aeration well is inserted into the underground aquifer, a second aeration head is provided on the second aeration well, and the second aeration well is connected to the liquid gas tank.

[0014] In some preferred embodiments, the first aeration well is located between the second aeration well and the underground contaminated area.

[0015] In some preferred embodiments, the agent injection well is located between the first aeration well and the second aeration well.

[0016] In order to better detect the groundwater situation, some preferred embodiments also include a groundwater detection mechanism, which includes a monitoring well, one end of which protrudes from the ground, and the other end of which is inserted into an underground aquifer. The monitoring well is provided with a plurality of water inlet holes, and the water inlet holes are located in the underground aquifer.

[0017] In some preferred embodiments, a temperature detector is provided in the monitoring well, and the temperature detector is located in an underground aquifer.

[0018] The beneficial effects of the present invention are as follows: when the low-temperature airflow-improved groundwater pollution air disturbance technology interception barrier system of the present invention is in use, the low-temperature airflow-improved groundwater air disturbance technology avoids the complex construction process of large-scale construction of barrier walls in traditional barrier technology through the synergistic mechanism of low-temperature airflow injection and air disturbance technology, thereby shortening the construction period and reducing costs, while reducing the impact of stratum disturbance on the interception effect. The technology has the advantages of simple operation, high efficiency and less destructiveness to the stratum, and can achieve physical interception for extreme groundwater pollution strata, avoiding the existing barrier technology, which can be divided into grouting interception wall, mud interception wall and geomembrane composite interception wall according to the construction method and materials of the barrier wall. The interception material directly affects the interception effect of pollutants, and the stratum disturbance will also damage the interception material. However, it has the problems of complex operation, low efficiency, greater destructiveness to the stratum, long construction period and high construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the refrigeration cycle mechanism in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the aeration mechanism in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the medicine injection mechanism of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the gas phase extraction mechanism in the present invention;

[0025] Figure 6It is a structural schematic diagram of the groundwater detection mechanism in the present invention.

[0026] In the figure: 1, refrigeration cycle mechanism, 11, refrigeration pipe, 12, condenser, 13, liquid gas tank, 14, temperature detector, 15, reflux valve, 16, water-gas separator;

[0027] 21. first aeration well, 22. second air compressor, 23. flower tube section, 24. first aeration head, 25. partition;

[0028] 3. Chemical injection mechanism, 31. Chemical injection well, 32. Chemical filling pump, 33. Chemical dispensing tank, 34. Chemical outlet hole;

[0029] 4. gas phase extraction mechanism, 41. gas extraction well, 42. gas extraction pump, 43. reaction box, 44. activated carbon adsorption tank;

[0030] 5. Groundwater testing organization, 51. Monitoring well, 52. Water inlet hole;

[0031] 6. Underground contaminated area, 7. Underground aquifer, 8. Ground. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments:

[0033] The present invention is not limited to the following specific embodiments. A person skilled in the art can implement the present invention in various other specific embodiments according to the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and ideas of the present invention fall within the protection scope of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] like Figure 1-6 As shown, a low temperature airflow improved groundwater pollution air disturbance technology interception barrier system comprises:

[0037] In the present embodiment, there are two refrigeration cycle mechanisms 1, which are opposite to both sides of the underground contaminated area 6 and enclose it in the middle. Of course, in addition to the two refrigeration cycle mechanisms 1, there can also be three, four or more, depending on the needs. Each refrigeration cycle mechanism 1 includes a first air compressor, a condenser 12, a liquid gas tank 13, a refrigeration pipe 11, a return valve 15 and a water-gas separator 16. The output end of the first air compressor is connected to the input end of the condenser 12, the output end of the condenser 12 is connected to the liquid gas tank 13, the liquid gas tank 13 is connected to one end of the refrigeration pipe 11, and the other end of the refrigeration pipe 11 is connected to one end of the return valve 15. The refrigeration pipe 11 is located in the underground aquifer 7, the other end of the return valve 15 is connected to the input end of the water-gas separator 16, and the output end of the water-gas separator 16 is connected to the liquid gas tank 13. The refrigeration pipe 11 is U-shaped, and an aeration mechanism is provided in the middle of the refrigeration pipe 11;

[0038] When the refrigeration cycle mechanism 1 needs to cool, the liquid refrigerant enters the U-shaped refrigeration pipe 11 to work, and then the reflux direction and flow rate of the refrigerant are accurately controlled by the reflux valve 15, and then the water and other impurities in the refrigerant are separated with the help of the water separator, and finally it is compressed and driven again by the first air compressor to ensure the continuous and stable operation of the circulation system. The refrigerant after working may be mixed with impurities such as water. The water-gas separator 16 removes these impurities through a specific separation principle to ensure the purity and refrigeration effect of the refrigerant in the circulation process. Then the first air compressor provides compression power and re-enters the pipeline circulation. The liquid gas tank 13 can receive the refrigerant returned from the end of the circulation to achieve stable operation of the entire refrigerant circulation mechanism. When the scope of the underground contaminated area 6 increases, the scope of groundwater outside the underground contaminated area 6 also expands, and lower temperature gas is required to achieve cooling and condensation of a large area of ​​water. When designing the ring mechanism 1, a variable diameter design is adopted at the connection points at both ends of the U-shaped refrigeration tube 11. In the variable diameter design, the thicker pipe connected to the front end of the U-shaped refrigeration tube 11 has a larger volume. When the refrigerant enters, the pipe space increases and the flow rate decreases, so that the refrigerant can accumulate in it for a short time, and the heat exchange time with the surrounding environment is prolonged, thereby fully reducing the refrigerant temperature. As the pipe diameter suddenly becomes smaller, the refrigerant flow rate increases and the pressure increases, forming a pressure difference that is conducive to the rapid circulation of the refrigerant in the entire pipeline system, ensuring that the refrigerant can efficiently exchange heat in the U-shaped refrigeration tube 11 and subsequent related pipelines. The lower temperature gas obtained by this variable diameter design, when combined with the aeration mechanism, significantly accelerates the cooling and condensation speed of a large area of ​​water, and more efficiently forms a freezing interception barrier, effectively coping with the groundwater pollution control problem caused by the expansion of the underground pollution area 6;

[0039] The medicine injection mechanism 3 is arranged on one side of the refrigeration cycle mechanism 1 and is arranged one-to-one with the medicine injection mechanism 3. The medicine injection mechanism 3 includes a medicine injection well 31, one end of the medicine injection well 31 protrudes from the bottom surface, and the other end of the medicine injection well 31 is inserted into the underground aquifer 7. The medicine injection well 31 is provided with a medicine outlet hole 34, and the medicine outlet hole 34 is located in the underground aquifer 7. One end of the medicine injection well 31 is connected to the output end of the medicine filling pump 32, and the input end of the medicine filling pump 32 is connected to the medicine dispensing tank 33;

[0040] In this embodiment, the agent is a refrigerant. The agent is input into the agent injection well 31 in the drug dispensing tank 33 through the action of the agent filling pump 32, and flows out from the drug outlet 34, promoting the freezing and condensation of the surrounding groundwater. After flowing out, the agent in the agent injection well 31 can change the physical and chemical properties of the surrounding groundwater and lower its freezing point, thereby accelerating the freezing and condensation process in a low-temperature environment, and further promoting the rapid formation of the freezing interception barrier system.

[0041] and a gas phase extraction mechanism 4, which is arranged corresponding to the reagent injection mechanism 3, and the gas phase extraction mechanism 4 includes an air extraction well 41, an air extraction pump 42, a reaction box 43 and an activated carbon adsorption tank 44 which are arranged in a closed manner from top to bottom. The upper end of the air extraction well 41 protrudes from the bottom surface, and the lower end of the air extraction well 41 is arranged underground and located above the underground aquifer 7. The air extraction well 41 is connected to the input end of the air extraction pump 42, and the output end of the air extraction pump 42 is connected to the inside of the reaction box 43, and the reaction box 43 is connected to the activated carbon adsorption tank 44, and the activated carbon adsorption tank 44 is connected to the outside;

[0042] The extracted gas first enters the reaction box 43, where it undergoes a chemical reaction with a specific agent to transform or remove some of the pollutants, and then enters the activated carbon adsorption tank 44 to further adsorb the remaining pollutants. After this series of treatments, it is discharged after meeting the standards. Since the pollution source in this embodiment is the highly volatile organic pollutant tetrachloroethylene, which is very easy to volatilize into the gas phase and diffuse to the surface, thereby causing pollution and seriously endangering human life and health, based on this special situation, the following targeted design is carried out: multiple gas phase extraction mechanisms 4, when the air pump 42 is started, will be near the air pump well 41 A negative pressure is formed, and the gas containing pollutants is extracted to the ground 8 for subsequent treatment by means of the negative pressure. The outlet of the vacuum pump 42 is connected to a reaction box 43 and an activated carbon adsorption tank 44 in sequence through a pipeline. A bacterial strain is placed in the reaction box 43. A bacterial strain that degrades tetrachloroethylene, such as the Geobacillus-iae strain, was discovered by the Polluted Environment Microbial Ecology Research Group of the Institute of Applied Ecology, Shenyang, Chinese Academy of Sciences. The strain uses electron donors to dechlorinate under anaerobic conditions, thereby degrading tetrachloroethylene. Activated carbon is installed in the activated carbon adsorption tank 44 to adsorb residual undegraded tetrachloroethylene, thereby achieving effective purification.

[0043] The aeration mechanism includes a first aeration well 21 with closed ends and a second air compressor 22. One end of the first aeration well 21 is inserted into the underground aquifer 7. The first aeration well 21 is located in the middle of the refrigeration pipe 11. A first aeration head 24 is provided on the first aeration well 21. The output end of the second air compressor 22 is connected to the first aeration well 21. During the aeration process, low-temperature gas is ejected outward from the aeration well. Since there is a significant temperature difference between the low-temperature gas and the groundwater in the surrounding aquifer, according to the principle of heat exchange, the heat in the groundwater will be quickly transferred to the low-temperature gas, causing the groundwater temperature to gradually decrease. When the temperature drops below the freezing point of water, the groundwater begins to freeze, and the ice crystals gradually grow and connect with each other, eventually forming a continuous ice layer structure outside the underground contaminated area 6, which serves as a blocking barrier to effectively prevent pollutants from spreading outward.

[0044] A plurality of first aeration heads 24 are arranged at intervals along the axial direction of the aeration well, a solenoid valve is arranged between each of the first aeration heads 24 and the first aeration well 21 , and a plurality of air extraction wells 41 are arranged around the refrigeration cycle mechanism 1 .

[0045] The underground contaminated area 6 is provided with a gas phase extraction mechanism 4 .

[0046] The refrigeration cycle mechanism 1 further includes a second aeration well, one end of which is inserted into the underground aquifer 7 , a second aeration head is provided on the second aeration well, and the second aeration well is connected to the liquid gas tank 13 .

[0047] The first aeration well 21 is located between the second aeration well and the underground contaminated area 6, and the reagent injection well 31 is located between the first aeration well 21 and the second aeration well. Partitions 25 are provided between the first aeration heads 24 and the second aeration heads to prevent the gases ejected from the aeration heads at different depths from interfering with each other and mixing, ensuring that each first aeration head 24 and each second aeration head can independently expose low-temperature gas according to the groundwater temperature at the depth and the condition of the underground contaminated area 6, so as to facilitate the response when the groundwater depths are different or the underground contaminated area 6 is in a complex groundwater environment, thereby improving the adaptability to the complex groundwater environment and more efficiently promoting the formation of freezing interception barriers in different areas.

[0048] It also includes a groundwater detection mechanism 5, which includes a monitoring well 51. One end of the monitoring well 51 protrudes from the ground 8, and the other end of the monitoring well 51 is inserted into the underground aquifer 7. The monitoring well 51 is provided with a plurality of water inlet holes 52, and the water inlet holes 52 are located in the underground aquifer 7. A temperature detector 14 is provided in the monitoring well 51, and the temperature detector 14 is located in the underground aquifer 7.

[0049] By extracting water samples from the monitoring well 51 for testing and analysis, and using the temperature sensor 14 in the monitoring well 51 to accurately monitor the groundwater temperature, not only can the type of pollutants be determined in order to prepare the corresponding reactants for chemical treatment, but it can also facilitate the control of the injection amount of the agent, timely adjust the aeration volume, stabilize the freezing interception barrier system, and ensure the effectiveness and controllability of the entire groundwater pollution control process.

[0050] When the above-mentioned low-temperature airflow-improved groundwater pollution air disturbance technology interception barrier system is in use, it is difficult to form a stable airflow barrier to prevent the diffusion and migration of pollutants because the air pressure is relatively low when the gas flows directly from the aeration well. To address this problem, low-temperature gas is used to improve ordinary AS aeration. Specifically, the low-temperature gas can cool the water area outside the underground contaminated area 6 through heat exchange technology, causing the groundwater to freeze and condense, thereby isolating the underground contaminated area 6 from the outside world, and the refrigerant will not be directly injected into the groundwater, avoiding secondary pollution of the groundwater. A temperature sensor 14 is installed in the monitoring well 51 of the aquifer. The temperature sensor 14 monitors the groundwater temperature in real time and transmits the data to the control system. Once the data shows that the water temperature is higher than the critical temperature required by the preset freezing interception system, the control system automatically triggers the command to increase the aeration pressure and the use of refrigerant in time. After increasing the aeration pressure and the use of refrigerant, by optimizing the jet structure design of the aeration well and adjusting the refrigerant flow distribution mechanism of the U-shaped refrigeration pipe 11, the low-temperature gas can enter the aquifer with a more uniform flow rate and pressure distribution, thereby stabilizing and strengthening the freezing interception system. Under the joint action of the U-shaped refrigeration pipe 11 and the aeration well, the formed freezing interception barrier is more stable.

[0051] Since the compressed and cooled air, as a liquid refrigerant, is prone to produce moisture in the pipeline, the moisture is easy to form ice blockage at the throttling device of the refrigeration system, hindering the normal circulation of the refrigerant and affecting the refrigeration effect, a further design is: a plurality of water-gas separators 16 are provided;

[0052] First, when the gas enters the pipeline after being compressed by the air compressor for the first time, the first water-gas separator 16 starts to work to remove the moisture in the liquefied gas, ensuring that the water content of the refrigerant entering the liquid gas tank 13, the U-shaped refrigeration pipe 11 and the circulating refrigerant is at a low level;

[0053] Next, when the refrigerant is released from the liquid gas tank 13, since pipeline transmission may cause the refrigerant state to change and mix with water, the water is separated again by the water-gas separator 16 at this time, and then the refrigerant can smoothly enter the U-shaped refrigeration tube 11 to work.

[0054] Finally, before the used refrigerant enters the air compressor for circulation, the water-gas separator 16 is still required to remove impurities, and the refrigerant compressed by the air compressor must also be removed from the impurities by the water-gas separator 16 again, thereby ensuring the continuous circulation of the refrigerant, effectively reducing the amount of refrigerant preparation, increasing the utilization rate of the refrigerant, and ensuring the stable and reliable operation of the entire refrigeration system.

[0055] To avoid leakage when extracting pollutant gases, a further design is as follows: the outlet of the vacuum pump 42 is connected to a reaction box 43 and an activated carbon adsorption tank 44 in sequence through pipelines; the reaction box 43 is equipped with substances that react with pollutants, which play a key role in chemically converting pollutants, so that pollutants are converted into harmless substances through chemical reactions; the activated carbon tube is equipped with activated carbon, which utilizes the rich pore structure of the activated carbon to adsorb harmful substances in the gas through physical adsorption.

[0056] Low-temperature gas is sprayed onto the water area outside the underground contaminated area 6, thereby forming a freezing interception barrier outside the underground contaminated area 6, thereby achieving preliminary isolation of the underground contaminated area 6 from the outside world and preventing the migration and diffusion of pollutants. At the same time, the freezing and condensation of groundwater around the underground contaminated area 6 is promoted with the help of chemicals, further strengthening the freezing effect of the low-temperature gas and accelerating the construction of the freezing interception barrier system. In addition, by detecting the water in the monitoring well 51, the type of pollutant can be determined, and appropriate reactants can be prepared for chemical reactions to eliminate the pollutants. At the same time, the temperature of the groundwater is accurately controlled by relying on the temperature sensor 14 in the monitoring well 51, so as to reasonably adjust the injection amount of the chemical and the aeration amount, and consolidate the freezing interception barrier system. In general, compared with traditional interception materials, the present invention not only significantly reduces the construction time and cost, but also can simultaneously treat volatile and non-volatile pollutants, effectively deal with the underground contaminated area 6 in a complex groundwater environment, and has a rapid response capability under special circumstances.

[0057] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system, characterized in that: include: At least two refrigeration cycle mechanisms (1) enclose an underground contaminated area (6) in the middle, each of the refrigeration cycle mechanisms (1) comprising a first air compressor, a condenser (12), a liquid gas tank (13), a refrigeration pipe (11), a reflux valve (15) and a water-gas separator (16), the output end of the first air compressor being in communication with the input end of the condenser (12), the output end of the condenser (12) being in communication with the liquid gas tank (13), the liquid gas tank (13) being in communication with one end of the refrigeration pipe (11), the other end of the refrigeration pipe (11) being in communication with one end of the refrigeration pipe (11), the other end of the refrigeration pipe (11) being in communication with the input end of the water-gas separator (16), the output end of the water-gas separator (16) being in communication with the liquid gas tank (13), the refrigeration pipe (11) being in a U-shape, and an aeration mechanism being arranged in the middle of the refrigeration pipe (11); A medicine injection mechanism (3) is arranged on one side of the refrigeration cycle mechanism (1) and is arranged one-to-one with the medicine injection mechanism (3), the medicine injection mechanism (3) comprising a medicine injection well (31), one end of the medicine injection well (31) protruding from the bottom surface, the other end of the medicine injection well (31) inserted into the underground aquifer (7), the medicine injection well (31) is provided with a medicine outlet hole (34), the medicine outlet hole (34) is located in the underground aquifer (7), one end of the medicine injection well (31) is connected to the output end of the medicine filling pump (32), and the input end of the medicine filling pump (32) is connected to the medicine dispensing tank (33); And a gas phase extraction mechanism (4), which is arranged corresponding to the reagent injection mechanism (3), the gas phase extraction mechanism (4) includes an air extraction well (41), an air extraction pump (42), a reaction box (43) and an activated carbon adsorption tank (44) which are arranged in a closed manner from top to bottom, the upper end of the air extraction well (41) protrudes from the bottom surface, the lower end of the air extraction well (41) is arranged underground and located above the underground aquifer (7), the air extraction well (41) is connected to the input end of the air extraction pump (42), the output end of the air extraction pump (42) is connected to the inside of the reaction box (43), the reaction box (43) is connected to the activated carbon adsorption tank (44), and the activated carbon adsorption tank (44) is connected to the outside.

2. According to claim 1, a low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system is characterized by: The aeration mechanism comprises a first aeration well (21) with both ends sealed and a second air compressor (22), one end of the first aeration well (21) is inserted into an underground aquifer (7), the first aeration well (21) is located in the middle of a refrigeration pipe (11), a first aeration head (24) is provided on the first aeration well (21), and an output end of the second air compressor (22) is connected to the first aeration well (21).

3. According to claim 2, a low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system is characterized by: A plurality of the first aeration heads (24) are arranged at intervals along the axial direction of the aeration well, and a solenoid valve is arranged between each of the first aeration heads (24) and the first aeration well (21).

4. According to claim 1, a low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system is characterized by: A plurality of the air extraction wells (41) are arranged around the refrigeration cycle mechanism (1).

5. A low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system according to claim 1 or 4, characterized in that: The underground contaminated area (6) is provided with a gas phase extraction mechanism (4).

6. According to claim 1, a low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system is characterized by: The refrigeration cycle mechanism (1) further comprises a second aeration well, one end of which is inserted into the underground aquifer (7), a second aeration head is provided on the second aeration well, and the second aeration well is connected to the liquid gas tank (13).

7. A low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system according to claim 6, characterized in that: The first aeration well (21) is located between the second aeration well and the underground contaminated area (6).

8. The low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system according to claim 7 is characterized by: The reagent injection well (31) is located between the first aeration well (21) and the second aeration well.

9. The low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system according to claim 1, characterized in that: The invention also comprises a groundwater detection mechanism (5), wherein the groundwater detection mechanism (5) comprises a monitoring well (51), one end of the monitoring well (51) protrudes from the ground (8), and the other end of the monitoring well (51) is inserted into the underground aquifer (7), and a plurality of water inlet holes (52) are arranged on the monitoring well (51), and the water inlet holes (52) are located in the underground aquifer (7).

10. A low-temperature airflow improved groundwater pollution air disturbance technology interception barrier system according to claim 9, characterized in that: A temperature sensing detector (14) is arranged in the monitoring well (51), and the temperature sensing detector (14) is located in the underground aquifer (7).

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