Underground water organic pollutant in-situ degradation system

Abstract

The utility model discloses an in-situ degradation system for organic pollutants in underground water, which relates to the technical field of water treatment and comprises a circulating well and an aeration device, an outer well pipe is arranged in the circulating well, an inner pipe is arranged in the outer well pipe, and an upper permeable partition plate and a lower closed partition plate are sequentially arranged between the outer well pipe and the inner pipe from top to bottom. A degradable filler is filled between the upper water-permeable partition plate and the lower closed partition plate; a water inlet spray hole is formed in the lower portion of the outer well pipe, a water outlet spray hole is formed in the position, close to the lower portion of the degradation filler, of the upper portion of the outer well pipe, and the water inlet spray hole and the water outlet spray hole are both located below the underground water level. The aeration device comprises an aeration mechanism, an aeration pipeline and an aeration head which are communicated in sequence, the aeration head is arranged at the lower part of the inner pipe, and the aeration mechanism is used for introducing air into the aeration head through the aeration pipeline for aeration, so that underground water outside the circulating well enters the outer well pipe through the water inlet spray hole; and the water overflows into the degradation filler through the inner pipe to degrade organic pollutants, and then is discharged through the water outlet spray holes.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an in-situ degradation system for groundwater organic pollutants. Background Art

[0002] Typical organic pollutants found in groundwater contamination sites include petroleum hydrocarbons, benzene series, organic halides, and polycyclic aromatic hydrocarbons, often in mixed forms. Organic groundwater contamination poses a serious threat to the ecological environment and human health. Therefore, it is essential to utilize localized, adaptable remediation technologies and methods to treat contaminated groundwater and effectively control the impact of contaminated sites on human health and the ecological environment.

[0003] In the past decade, the control and in-situ restoration technology of groundwater organic pollution has made great progress. There are many methods: such as extraction and treatment technology, biodegradation technology, chemical oxidation treatment, vacuum extraction, permeable reaction wall technology, etc. Among them, ex situ extraction and treatment technology is a typical extraction and treatment technology. It extracts groundwater directly to the ground, purifies it with the help of a series of water treatment technologies, and then injects it back into the ground. However, this method is difficult to operate and has poor controllability. Long-term operation of the equipment will lead to high energy input. At the same time, it also causes great disturbance to the environment. When the pump is stopped, in many cases the dissolved contaminated area will form again or even expand. This has aroused widespread attention to the in situ bioremediation technology of groundwater organic pollution.

[0004] As an in-situ remediation technology, groundwater circulation wells (GCWs) offer active remediation capabilities, effectively removing volatile and semi-volatile organic pollutants from groundwater, improving remediation efficiency and reducing costs. They can also be used in locations where reactive walls are inappropriate (such as those with deep groundwater depths), demonstrating significant potential for application in actual site remediation. However, studies have shown that GCWs have low remediation efficiency for semi-volatile organic pollutants and exhibit a significant tailing effect. Further research is needed to enhance remediation methods for heavy non-aqueous phase liquid (DNAPL) contaminants.

[0005] It can be seen from this that how to long-term enhance the efficiency of pollutant removal other than volatilization during groundwater circulation and increase degradation pathways to improve the efficiency of GCW in remediating organic pollution is an urgent problem to be solved. Utility Model Content

[0006] The purpose of the utility model is to provide an in-situ degradation system for groundwater organic pollutants to solve the problems existing in the above-mentioned prior art, which can simultaneously remove groundwater organic pollutant promoter M and volatile organic pollutants, thereby improving the GCW remediation efficiency of organic pollution.

[0007] To achieve the above purpose, the present invention provides the following solutions:

[0008] The utility model provides an in-situ degradation system for groundwater organic pollutants, comprising a circulation well and an aeration device, wherein an outer well pipe is arranged in the circulation well, an inner pipe is arranged in the outer well pipe, an upper permeable baffle and a lower closed baffle are arranged in sequence from top to bottom between the outer well pipe and the inner pipe, and degradation filler is filled between the upper permeable baffle and the lower closed baffle; a water inlet hole is arranged at the lower part of the outer well pipe, and a water outlet hole is arranged at the upper part of the outer well pipe near the lower part of the degradation filler, and the water inlet hole and the water outlet hole are both located below the groundwater level; the aeration device comprises an aeration mechanism, an aeration pipeline and an aeration head that are connected in sequence, the aeration head being arranged at the lower part of the inner pipe, the aeration mechanism being used to pass air into the aeration head through the aeration pipeline for aeration, so that groundwater outside the circulation well enters the outer well pipe through the water inlet hole, overflows into the degradation filler through the inner pipe, degrades organic pollutants, and is then discharged through the water outlet hole.

[0009] Preferably, the degradable filler includes a slow-release carbon source and slow-control fertilizer composite layer, a microorganism-loaded porous foam layer, a manganese ore catalytic layer and an activated carbon fiber adsorption layer arranged in sequence from top to bottom, wherein the slow-release carbon source and slow-control fertilizer composite layer is used to provide microbial nutrients, and the microorganism-loaded porous foam layer is used to provide a microbial flora that degrades organic matter in groundwater.

[0010] Preferably, the composite layer of slow-release carbon source and slow-release fertilizer comprises a plurality of spherical fillers with a diameter of 1 cm to 2 cm.

[0011] Preferably, the microorganism-loaded porous foam layer is a porous foam carrier loaded with microbial agents.

[0012] Preferably, the thickness of the slow-release carbon source and slow-control fertilizer composite layer is 20cm-30cm; the thickness of the manganese ore catalytic layer is 20cm-40cm; the length of the pipe section on the outer well pipe with the water inlet hole is 20cm-60cm; the length of the pipe section on the outer well pipe with the water outlet hole is 20cm-50cm.

[0013] Preferably, the upper permeable partition is provided with permeable holes.

[0014] Preferably, the aeration mechanism is an air compressor.

[0015] Preferably, the aeration head is a microporous aerator.

[0016] Preferably, the in-situ degradation system for groundwater organic pollutants further includes a volatile gas treatment device, and a gas outlet is provided at the top of the outer well pipe, and the gas outlet is connected to the volatile gas treatment device.

[0017] Preferably, the volatile gas treatment device includes an air inlet pipeline, a gas treatment box and an air outlet pipeline connected in sequence, the air inlet of the air inlet pipeline is connected to the air outlet of the outer well pipe, and the gas treatment box is filled with activated carbon fiber adsorption filler.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model provides an in-situ degradation system for groundwater organic pollutants, including a circulation well and an aeration device. An outer well pipe is provided in the circulation well, an inner pipe is provided in the outer well pipe, an upper permeable baffle and a lower closed baffle are provided between the outer well pipe and the inner pipe, and degradation filler is filled between the upper permeable baffle and the lower closed baffle. The aeration device includes an aeration mechanism, an aeration pipeline and an aeration head which are connected in sequence. When groundwater treatment is performed, air is introduced into the aeration head located at the lower part of the inner pipe through the aeration pipeline by the aeration mechanism for aeration, so that groundwater outside the circulation well enters the outer well pipe through the water inlet hole at the lower part of the outer well pipe. Under the action of aeration, the groundwater is lifted upward, overflows through the inner pipe to the degradation filler between the upper permeable baffle and the lower closed baffle, where organic pollutants are degraded, and then discharged through the water outlet hole at the upper part of the outer well pipe, thereby achieving the simultaneous removal of groundwater organic pollutant promoter M and volatile organic pollutants, and improving the GCW repair efficiency of organic pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the working status of the in-situ degradation system for groundwater organic pollutants provided by an embodiment of the utility model.

[0022] In the figure: 1-outer well pipe, 101-water inlet hole, 102-water outlet hole, 2-inner pipe, 3-upper permeable baffle, 301-support plate, 4-lower closed baffle, 5-degradable filler, 501-slow-release carbon source and slow-control fertilizer composite layer, 502-microorganism-loaded porous foam layer, 503-manganese ore catalytic layer, 504-activated carbon fiber adsorption layer, 6-aeration mechanism, 7-aeration pipeline, 701-flow meter, 702-valve, 8-aeration head, 9-air inlet pipeline, 10-gas treatment box, 11-air outlet pipeline. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the utility model is to provide an in-situ degradation system for groundwater organic pollutants to solve the problems existing in the prior art, and to simultaneously remove groundwater organic pollutant promoter M and volatile organic pollutants, thereby improving the efficiency of GCW in repairing organic pollution.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, this embodiment provides an in-situ degradation system for groundwater organic pollutants, including a circulation well and an aeration device, an outer well pipe 1 is provided in the circulation well, an inner pipe 2 is provided in the outer well pipe 1, an upper permeable baffle 3 and a lower closed baffle 4 are provided between the outer well pipe 1 and the inner pipe 2 from top to bottom, and a degradation filler 5 is filled between the upper permeable baffle 3 and the lower closed baffle 4; a water inlet hole 101 is provided at the lower part of the outer well pipe 1, a water outlet hole 102 is provided at the upper part of the outer well pipe 1 near the lower part of the degradation filler 5, and the water inlet hole 101 and the water outlet hole 102 are both located below the groundwater level; the aeration device includes an aeration mechanism 6, an aeration pipeline 7 and an aeration head 8 connected in sequence, the aeration head 8 is provided at the lower part of the inner pipe 2, the aeration mechanism 6 is used to pass air into the aeration head 8 through the aeration pipeline 7 for aeration, so that the circulation well The outside groundwater enters the outer well pipe 1 through the water inlet hole 101, overflows through the inner tube 2 to the degradable filler 5 for degradation of organic pollutants, and is then discharged through the water outlet hole 102; specifically, the groundwater entering the outer well pipe 1 through the water inlet hole 101 is lifted upward under the aeration action of the aeration device, and first overflows through the inner tube 2 to the upper permeable baffle 3. The upper permeable baffle 3 is provided with water-permeable holes, which can buffer the groundwater and make the groundwater form a slow flow, reducing the impact on the degradable filler 5. At the same time, the upper permeable baffle 3 can also reduce the floating and movement of the degradable filler 5. Then, the groundwater enters the degradable filler 5 through the upper permeable baffle 3 for degradation of organic pollutants. At this time, the lower closed baffle 4 can intercept the groundwater, so that the purified groundwater is discharged through the water outlet hole 102 above the lower closed baffle 4.

[0027] In this embodiment, the degradation filler 5 includes a slow-release carbon source and slow-control fertilizer composite layer 501, a microbial-loaded porous foam layer 502, a manganese ore catalytic layer 503 and an activated carbon fiber adsorption layer 504, which are arranged in sequence from top to bottom. Among them, the slow-release carbon source and slow-control fertilizer composite layer 501 is used to provide microbial nutrients, and the microbial-loaded porous foam layer 502 is used to provide a microbial flora that degrades groundwater organic matter; this system effectively increases the concentration of dissolved oxygen, nutrients and the types of microorganisms in the groundwater around the circulation well. At the same time, relying on the catalytic effect of natural mineral manganese ore, it can achieve the purpose of long-term degradation of organic pollutant promoter M and volatile organic pollutants.

[0028] It should be noted that the organic pollutant accelerator M is a low-solubility organic pollutant classified as a heavy non-aqueous liquid pollutant (DNAPL). DNAPL is difficult to degrade and dissolve, resulting in high remediation costs. In unsaturated soil, if DNAPL contamination is not promptly removed, it will migrate vertically under the action of gravity, reaching the impermeable roof of saturated clay soil with low permeability. The low-permeability strata act as a barrier to the vertical migration of pollutants in the groundwater. However, organic pollutants are captured by fine particles in the low-permeability strata through diffusion and adsorption. These captured pollutants become new sources of pollution, releasing and diffusing to areas of high permeability over time, leading to groundwater remediation tailing and pollution rebound, greatly increasing the difficulty and cost of in-situ groundwater remediation. This system, as an in-situ, long-term degradation system for groundwater organic pollutants, simultaneously removes the organic pollutant accelerator M and volatile organic compounds without extracting groundwater. This convenient and practical system improves the efficiency of GCW remediation of organic pollution.

[0029] In this embodiment, the slow-release carbon source and slow-controlled fertilizer composite layer 501 includes a plurality of spherical fillers with a diameter of 1 cm to 2 cm.

[0030] It should be noted that the spherical filler in the slow-release carbon source and slow-control fertilizer composite layer 501 is prepared with flour and cornmeal as carbon sources, 21% urea, 2.5% ammonium dihydrogen phosphate as nutrients, combined with sodium alginate, calcium chloride and agar. It is easy to use and simple, which helps to prolong the effective action time of the slow-release carbon source and slow-control fertilizer composite layer 501, and ensure the continuous release of slow-release nutrients over a relatively long period of time. Since the slow-release carbon source and slow-control fertilizer are consumable materials and need to be replaced every 1 to 2 months, they are placed on the top layer of the degradable filler 5. When the groundwater flows through, it first passes through the slow-release carbon source and slow-control fertilizer composite layer 501. The slow-release carbon source and slow-control fertilizer composite layer 501 slowly releases nutrients that can provide nutrients for the specific microorganisms in the microbial-loaded porous foam layer 502 below it and the indigenous microorganisms in the groundwater.

[0031] It should be noted that the upper permeable baffle 3 in this embodiment is provided with permeable holes, the opening area of ​​which is slightly smaller than the slow-release carbon source and slow-control fertilizer particles. In this way, the groundwater is lifted upward by aeration, and after overflowing from the inner tube 2 to the outer well pipe 1, it passes through the upper permeable baffle 3 to form a slow flow of groundwater, thereby reducing the scouring of the slow-release carbon source and slow-control fertilizer composite layer 501 below. At the same time, since the degradable filler 5 is relatively light in weight, the upper permeable baffle 3 can effectively control the floating and movement of the degradable filler 5.

[0032] It should be noted that a support plate 301 is fixed on the pipe wall of the outer well pipe 1 in this embodiment, providing an installation base for the upper permeable baffle 3. The support plate 301 and the upper permeable baffle 3 are fixed by a slot, which facilitates the disassembly of the upper permeable baffle 3 to replace the degradable filler 5.

[0033] In this embodiment, the microbial-loaded porous foam layer 502 is a porous foam carrier loaded with microbial agents, which can enhance the degradation of organic matter such as the promoter M, decomposing it into small molecular inorganic substances such as carbon dioxide and water, and the microorganisms enter the aquifer with the groundwater circulation, and can synergistically degrade organic pollutants with the indigenous microorganisms in the groundwater.

[0034] It should be noted that the microbial-loaded porous foam layer 502 is prepared by composite biofilm formation with a microbial flora composed of a mixture of JM bacteria and a composite yeast and a porous foam carrier. The porous foam carrier has a large specific surface area and abundant pores, which can provide a good environment for the growth of microorganisms while being water-permeable. In addition, the microorganisms are loaded between its internal pores, extending the effective contact time with harmful substances such as accelerator M. Specific microorganisms can be slowly released into the aquifer along with the groundwater circulation, thus effectively solving the problem of organic pollutants in groundwater.

[0035] It should be noted that the material of the manganese ore catalytic layer 503 is a manganese ore material with a manganese dioxide content of more than 40%, and its main component is high-valent manganese minerals. High-valent manganese minerals have strong adsorption and oxidation capabilities and are a type of highly active minerals. At the same time, the surface phase interface effect of manganese minerals and the dealkylation effect on their surface, as well as various chemical mechanisms, enable them to promote the further degradation of large amounts of organic matter under anaerobic or anoxic conditions.

[0036] It should be noted that the activated carbon fiber adsorption layer 504 is a new, highly efficient adsorbent. It uses organic fibers as a precursor and possesses a unique nanoporous structure. It also exhibits excellent formability, acid and alkali resistance, and chemical stability. Compared to conventional granular and powdered activated carbons, it boasts a significantly larger specific surface area and pores directly located on the fiber surface, resulting in superior adsorption capacity and speed. Its abundant surface functional groups impart a degree of adsorption selectivity, allowing it to remove pollutants through catalysis, particularly facilitating the adsorption of volatile organic compounds. The manganese ore catalytic layer 503 and activated carbon fiber adsorption layer 504 further enhance the removal of organic pollutants through adsorption, catalysis, and oxidation.

[0037] In this embodiment, the thickness of the slow-release carbon source and slow-control fertilizer composite layer 501 is 20cm-30cm; the thickness of the manganese ore catalytic layer 503 is 20cm-40cm; the length of the pipe section on the outer well pipe 1 with the water inlet hole 101 is 20cm-60cm; the length of the pipe section on the outer well pipe 1 with the water outlet hole 102 is 20cm-50cm.

[0038] In this embodiment, the aeration mechanism 6 is an air compressor; the aeration head 8 is a microporous aerator; and the aeration pipeline 7 is provided with a flow meter 701 and a valve 702 .

[0039] In this embodiment, the in-situ degradation system for groundwater organic pollutants also includes a volatile gas treatment device. An air outlet is provided at the top of the outer well pipe 1, and the air outlet is connected to the volatile gas treatment device. The gas-water mixture (gas carrying volatile organic compounds) rising from the inner pipe 2 after aeration is treated as exhaust gas by the volatile gas treatment device and then discharged.

[0040] Furthermore, the volatile gas treatment device includes an air inlet pipe 9, a gas treatment box 10 and an air outlet pipe 11 connected in sequence. The air inlet of the air inlet pipe 9 is connected to the air outlet of the outer well pipe 1. The gas treatment box 10 is filled with activated carbon fiber adsorption filler. The activated carbon fiber adsorption filler has a large adsorption capacity and a fast adsorption speed, which is particularly conducive to the adsorption of volatile organic compounds and is easy to replace.

[0041] The working process of the in-situ degradation system for groundwater organic pollutants provided in this embodiment is as follows:

[0042] An air compressor delivers air to the microporous aerator through the aeration pipe 7 to generate microbubbles. Oxygen is dissolved into water at the gas-liquid interface, causing the air to mix with groundwater to form a gas-water mixture. While increasing the oxygen content of the groundwater, the groundwater density decreases and migrates upward, prompting the groundwater at the water inlet hole 101 at the bottom of the circulation well to continuously flow into the well. The gas-water mixture (gas carrying volatile organic compounds) rising from the inner tube 2 is discharged through the air outlet of the outer well pipe 1 located above the ground, and is discharged after being treated by the volatile gas treatment device. At the same time, the flow meter 701 and valve 702 on the aeration pipe 7 can control the groundwater circulation speed according to the aeration flow rate. The aerated groundwater flows upward along the inner tube 2, overflows to the outer well pipe 1, and then passes through the degradation filler 5 to degrade the non-volatile and heavy non-aqueous organic pollutants in the groundwater. Finally, it diffuses through the water outlet hole 102 and flows back to the aquifer, realizing the circulation of groundwater.

[0043] The in-situ degradation system for groundwater organic pollutants provided in this embodiment has the following advantages:

[0044] First, a groundwater circulation well method is employed. Through the upper permeable baffle 3, the lower closed baffle 4, and the degradable filler 5, volatile organic compounds and promoter M organic compounds can be simultaneously removed. Specifically, the inner tube 2 removes volatile organic pollutants through aeration. The outer well pipe 1 forms upper and lower well pipes through the upper permeable baffle 3 and the lower closed baffle 4. The upper permeable baffle 3 has permeable holes that allow the groundwater to flow slowly. Subsequently, it flows through the slow-release carbon source and slow-control fertilizer composite layer 501. Through groundwater circulation, the oxygen content and nutrients in the groundwater around the circulation well are long-term enhanced, thereby enhancing the degradation of organic pollutants by indigenous aerobic microorganisms. Organic pollutants are then degraded through the microbial-loaded porous foam layer 502, the manganese ore catalytic layer 503, and the activated carbon fiber adsorption layer 504. This method has the advantages of being simple and convenient, with the simultaneous removal of promoter M organic pollutants and volatile organic compounds without the need for groundwater extraction.

[0045] Second, the microbial-loaded porous foam layer 502 has a large specific surface area, abundant pores, and is water-permeable, providing a good environment for microbial growth and serving as a microbial carrier. Without this layer, relying solely on indigenous microorganisms would not be able to quickly and efficiently degrade the organic pollutants in the promoter M.

[0046] Third, the slow-release carbon source and slow-control fertilizer are prepared into spherical fillers, which makes the construction simpler and more convenient. The carbon source required for the survival of groundwater microorganisms is guaranteed without the need for additional equipment. It is only necessary to regularly replace the slow-release carbon source and slow-control fertilizer composite layer 501.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An in-situ degradation system for groundwater organic pollutants, characterized by: The invention comprises a circulation well and an aeration device, wherein an outer well pipe is provided in the circulation well, an inner pipe is provided in the outer well pipe, an upper permeable baffle and a lower closed baffle are provided in sequence from top to bottom between the outer well pipe and the inner pipe, and degradable filler is filled between the upper permeable baffle and the lower closed baffle; a water inlet hole is provided at the lower part of the outer well pipe, and a water outlet hole is provided at the upper part of the outer well pipe near the lower part of the degradable filler, and both the water inlet hole and the water outlet hole are located below the groundwater level; the aeration device comprises an aeration mechanism, an aeration pipeline and an aeration head connected in sequence, the aeration head being provided at the lower part of the inner pipe, the aeration mechanism being used to pass air into the aeration head through the aeration pipeline for aeration, so that groundwater outside the circulation well enters the outer well pipe through the water inlet hole, overflows through the inner pipe into the degradable filler for degradation of organic pollutants, and is then discharged through the water outlet hole.

2. The in-situ degradation system for groundwater organic pollutants according to claim 1, characterized in that: The degradable filler includes a slow-release carbon source and slow-control fertilizer composite layer, a microbial-loaded porous foam layer, a manganese ore catalytic layer, and an activated carbon fiber adsorption layer, which are arranged in sequence from top to bottom. The slow-release carbon source and slow-control fertilizer composite layer are used to provide microbial nutrients, and the microbial-loaded porous foam layer is used to provide a microbial flora that degrades organic matter in groundwater.

3. The in-situ degradation system for groundwater organic pollutants according to claim 2, characterized in that: The slow-release carbon source and slow-release fertilizer composite layer comprises a plurality of spherical fillers with a diameter of 1 cm to 2 cm.

4. The in-situ degradation system for groundwater organic pollutants according to claim 2, characterized in that: The microorganism-loaded porous foam layer is a porous foam carrier loaded with microbial agents.

5. The in-situ degradation system for groundwater organic pollutants according to claim 2, characterized in that: The thickness of the slow-release carbon source and slow-control fertilizer composite layer is 20cm-30cm; the thickness of the manganese ore catalytic layer is 20cm-40cm; the length of the pipe section on the outer well pipe with the water inlet hole is 20cm-60cm; the length of the pipe section on the outer well pipe with the water outlet hole is 20cm-50cm.

6. The in-situ degradation system for groundwater organic pollutants according to claim 1, characterized in that: The upper permeable partition is provided with permeable flower holes.

7. The in-situ degradation system for groundwater organic pollutants according to claim 1, characterized in that: The aeration mechanism is an air compressor.

8. The in-situ degradation system for groundwater organic pollutants according to claim 1, characterized in that: The aeration head is a microporous aerator.

9. The in-situ degradation system for groundwater organic pollutants according to claim 1, characterized in that: The in-situ degradation system for groundwater organic pollutants further comprises a volatile gas treatment device. The top of the outer well pipe is provided with a gas outlet, and the gas outlet is communicated with the volatile gas treatment device.

10. The in-situ degradation system for groundwater organic pollutants according to claim 9, characterized in that: The volatile gas treatment device includes an air inlet pipeline, a gas treatment box and an air outlet pipeline which are connected in sequence. The air inlet of the air inlet pipeline is connected to the air outlet of the outer well pipe. The gas treatment box is filled with activated carbon fiber adsorption filler.

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