CN114433612B - VOCs pollutes soil body reinforcing aeration prosthetic devices - Google Patents

VOCs pollutes soil body reinforcing aeration prosthetic devices Download PDF

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Publication number
CN114433612B
CN114433612B CN202210062997.8A CN202210062997A CN114433612B CN 114433612 B CN114433612 B CN 114433612B CN 202210062997 A CN202210062997 A CN 202210062997A CN 114433612 B CN114433612 B CN 114433612B
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aeration
pipe
tube
wall
air
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CN114433612A (en
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许龙
胡心怡
查甫生
李浩男
储诚富
康博
杨成斌
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Hefei University of Technology
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Hefei University of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/005—Extraction of vapours or gases using vacuum or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/08—Reclamation of contaminated soil chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C2101/00—In situ
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Processing Of Solid Wastes (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The invention relates to the field of underground water and soil organic pollutant restoration, in particular to an aeration device which can be used for conventional aeration, pressure gradient enhanced aeration to restore VOCs pollution and surfactant enhanced aeration to restore VOCs pollution. The device comprises an inner pipe, an outer pipe, a spherical aeration head, two identical air bags and a motor, wherein the inner pipe and the outer pipe are coaxial, and the outer pipe is sleeved outside the inner pipe. The position of the outer tube in the aeration well can be randomly adjusted according to the position of the VOCs polluted area, so that the aim of injecting the surfactant into polluted soil is fulfilled. The aeration ports uniformly distributed on the spherical aeration heads can generate more seepage channels, and the back pressure is controlled by the back pressure valve, so that on one hand, a larger gas pressure gradient is formed in the aeration process, and the seepage effect is generated in the aerated gas soil; on the other hand, the mechanical effect of the soil body is enhanced, more seepage channels are generated in the aeration process, so that pollutants are volatilized more, and further the removal of the pollutants is promoted. The aeration device has important practical engineering significance for improving the aeration efficiency and strengthening the aeration repairing effect.

Description

VOCs pollutes soil body reinforcing aeration prosthetic devices
Technical Field
The invention relates to the field of underground water and soil organic pollutant restoration, in particular to an aeration device for restoring VOCs pollution by pressure gradient enhanced aeration and restoring VOCs pollution by surfactant enhanced aeration.
Background
Under the background of the age of high-speed development of science and technology, the development of agriculture and industry in China realizes mass fly-over. Meanwhile, the soil pollution problem becomes an epoch difficulty which puzzles us for many years. Among them, compared with its heavy metal pollutant and radioactive pollutant, the pollution of organic pollutant to soil and groundwater is more serious, it is the main source of soil and groundwater pollution at present.
The aeration method has the advantages of simple operation, high efficiency, environmental friendliness and the like, is one of the most effective methods for repairing the volatile organic compound polluted underground water, and has become one of the most effective methods for treating VOCs pollution in the hypertonic soil. In the aeration process, air is injected into a polluted area through an aeration well to generate a seepage channel, VOCs pollutants in water and soil are transported to the channel through dissolution and diffusion, then volatilized to an unsaturated zone, and then under the action of a soil gas phase extraction technology, polluted gas is pumped out of the ground and is treated on the ground, so that the purpose of restoration is achieved. However, because of the complexity and non-uniformity of the field stratum, the repair effect of the aeration method is often poor, and the pollution problem of the VOCs in the hypotonic soil body is increasingly serious. Therefore, in order to improve the aeration restoration effect of the high-low permeability polluted soil body, the exploration of the novel enhanced aeration restoration device has extremely important engineering and scientific significance.
For example, chinese patent application publication (CN 112875881 a) discloses an aeration device for repairing VOCs pollution, which comprises a top pipe, a transfer pipe, an inner pipe, a hollow sleeve, a bottom pipe, an air bag a, an air bag B, and an air bag C. The position of the aeration device in the aeration well can be randomly adjusted according to the position of the VOCs pollution area, so that the change of aeration point positions is realized. However, the aeration device can only improve the aeration restoration effect of the hypertonic polluted soil body to a certain extent, and can not solve the problem of poor aeration restoration effect of the hypotonic polluted soil body.
Therefore, in order to solve the problems, the invention provides a VOCs polluted soil body enhanced aeration restoration device.
Disclosure of Invention
The invention aims to solve the problems and provides a VOCs polluted soil body enhanced aeration restoration device and an operation method thereof.
The object of the invention can be achieved by the following technical scheme. The invention provides a VOCs polluted soil body enhanced aeration restoration device, which comprises an inner pipe, an outer pipe, a spherical aeration head, two identical air bags and a motor, wherein the inner pipe and the outer pipe are coaxial, and the outer pipe is sleeved outside the inner pipe;
the inner pipe is a hollow round pipe with a closed top, the end surface of the top of the inner pipe is provided with an air injection port, and the inner wall of the bottom of the inner pipe is provided with internal threads; the upper end face of the inner pipe is vertically upwards from the lower end faceL A1 Distance and vertical upward from lower end face is L A2 The part between the distances is marked as a region A, one air bag is sleeved at the top position of the region A, the other air bag is sleeved at the bottom position of the region A, and a plurality of air holes are uniformly distributed on the pipe wall of the inner pipe sleeved with the air bag; the outer diameter of the inner tube is recorded as D1, and the length is recorded as L1;
the spherical aeration head consists of a main body and a top which are integrally formed, the top is a hollow cylinder, and the main body is a hollow sphere with one end open and is communicated with the top at the open position; the outer diameter of the top is the same as the inner diameter of the inner tube, the outer wall is provided with external threads corresponding to the internal threads at the bottom of the inner tube, namely, the spherical aeration head is connected with the inner tube through the external threads, and the wall of the lower hemisphere of the main body is provided with aeration holes which are uniformly distributed;
the top and the bottom of the outer tube are both closed, through holes with the diameter of D2 are respectively reserved on two end faces, d2=d1+2δ, wherein δ is a gap, and the inner tube passes through the two through holes to be sleeved in the outer tube and can perform displacement in the axial direction; a plurality of air holes are uniformly distributed on the whole pipe wall of the outer pipe; n evenly distributed air outlets are arranged on the top end face of the outer tube; m U-shaped pipes in the axial direction are uniformly welded on the inner wall of the outer pipe, the length of each U-shaped clamping pipe is the same as the height of the inner cavity of the outer pipe, the opening end of each U-shaped pipe is welded on the inner wall of the outer pipe in the axial direction, namely M cavities in the axial direction, which are formed by the inner wall of the outer pipe, the upper end face and the lower end face of the outer pipe and the inner wall of the U-shaped pipe, are formed in the inner cavity of the outer pipe, and the cavities are marked as surfactant injection cavities; m surfactant injection openings communicated with the M surfactant injection cavities are arranged on the top end surface of the outer tube at positions corresponding to the M surfactant injection cavities; the length of the outer tube is recorded as L2, and L2= 0.4L1-0.6L1;
two hooks are symmetrically arranged on the upper end surface of the outer tube, and a motor is connected with the hooks through a steel wire rope to control the axial displacement of the inner tube in the outer tube;
when the device works, the enhanced aeration repairing device is installed in an aeration well through the hoisting device, and the upper end face of the inner pipe of the enhanced aeration repairing device is level with the ground surface.
Preferably, the air bag is an annular high-pressure blocking air bag, the outer diameter of the air bag after being inflated is recorded as D1, the inner diameter of the outer pipe is recorded as D3, and D1 is more than or equal to D3; the L is A1 ＝L2，L A2 ＝1/4L2。
Preferably, the outer diameter of the main body part of the spherical aeration head is D4, the inner diameter of the outer tube is D3, and D2 is less than or equal to D4 and less than D3 is satisfied.
Preferably, the difference between the outer diameter of the outer tube and the inner diameter of the aeration well is noted as a gap h, h < 1cm.
Preferably, the pore diameter of the air hole is 1mm-3mm, and the pore diameter of the aeration hole is 6mm-10mm.
Preferably, the gap δ is < 5mm.
Compared with the prior art, the invention has the beneficial effects that:
1. the outer tube of the invention is provided with the surfactant injection cavity, so that the surfactant enhanced aeration repair technology can be added on the basis of the traditional aeration technology.
2. The structure of the inner and outer pipes can randomly adjust the position of the outer pipe in the aeration well according to the position of the VOCs pollution area, thereby realizing the change of the injection range of the surfactant.
3. The top of the outer pipe is provided with the air outlet, and the air outlet is connected with the back pressure valve, so that the back pressure in the aeration process can be regulated, on one hand, a larger gas pressure gradient is generated in the aeration process, and on the other hand, the soil body mechanical effect is enhanced, thereby achieving the purpose of enhancing aeration restoration.
Drawings
FIG. 1 is a schematic view of the overall structure of an enhanced aeration repair apparatus in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the distribution of air holes and aeration holes of an enhanced aeration repair device in an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of an inner tube according to an embodiment of the present invention;
FIG. 4 is a schematic view of the outer tube structure in an embodiment of the present invention;
FIG. 5 is a top plan view of the top of an outer tube in an embodiment of the present invention;
fig. 6 is a schematic view of the aeration operation of the present invention at an actual site.
In the figure: 1. a spherical aeration head; 2. aeration holes; 3. an air injection port; 4. an inner tube; 5. a motor; 6. a wire rope; 7. an outer tube; 8. a surfactant injection chamber; 9. an air bag; 10. a hook; 11. an air outlet; 12. a surfactant injection port; 13. a back pressure valve; 14. air holes; 15. a through hole; 16. VOCs contaminated areas; 17. a surfactant injection tube; 18. aerating a gas well; 19. a surfactant injection tank; 20. an air pump; 21. a gas flow meter; 22. a pressure regulating valve; 23. a switch; 24. an air injection pipe; 25. an extraction pump; 26. and (3) extracting the well.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of the overall structure of an enhanced aeration repairing apparatus according to an embodiment of the present invention, fig. 2 is a schematic view of the distribution of air holes and aeration holes of the enhanced aeration repairing apparatus according to an embodiment of the present invention, fig. 3 is a schematic view of the structure of an inner tube according to an embodiment of the present invention, fig. 4 is a schematic view of the structure of an outer tube according to an embodiment of the present invention, and fig. 5 is a top plan view of the top of the outer tube according to an embodiment of the present invention. As seen in fig. 1 to 5, the enhanced aeration repairing apparatus of the present invention comprises an inner tube 4, an outer tube 7, a spherical aeration head 1, two identical air bags 9 and a motor 5, wherein the inner tube 4 and the outer tube 7 are coaxial, and the outer tube 7 is sleeved outside the inner tube 4.
The inner tube 4 is a hollow circular tube with a closed top, the end face of the top of the inner tube 4 is provided with an air injection port 3, and the inner wall of the bottom of the inner tube 4 is provided with an internal thread. The inner pipe 4 is vertically upwards from the lower end face to be L A1 Distance and vertical upward from lower end face is L A2 The part between the distances is marked as a region A, one air bag 9 is sleeved at the top position of the region A, the other air bag 9 is sleeved at the bottom position of the region A, and a plurality of air holes 14 are uniformly distributed on the pipe wall of the inner pipe 4 sleeved with the air bag 9. The inner tube 4 has an outer diameter D1 and a length L1.
The spherical aeration head 1 is composed of a body and a top which are integrally formed, the top is a hollow cylinder, and the body is a hollow sphere with one end open and is communicated with the top at the open position. The outer diameter of the top is the same as the inner diameter of the inner tube 4, the outer wall is provided with external threads corresponding to the internal threads at the bottom of the inner tube 4, namely, the spherical aeration head 1 is connected with the inner tube 4 through the external threads, and the wall of the lower hemisphere of the main body is provided with aeration holes 2 which are uniformly distributed.
The top and the bottom of the outer tube 7 are both closed, and through holes 15 with the diameter of D2 are respectively reserved on two end faces, d2=d1+2δ, wherein δ is a gap, and the inner tube 4 passes through the two through holes 15 to be sleeved in the outer tube 7 and can perform displacement in the axial direction. A plurality of air holes 14 are uniformly distributed on the whole pipe wall of the outer pipe 7, and N uniformly distributed air outlets 11 are arranged on the top end surface of the outer pipe 7. M U-shaped pipes in the axial direction are uniformly welded on the inner wall of the outer pipe 7, the length of the U-shaped clamping pipe is the same as the height of the inner cavity of the outer pipe 7, the opening end of the U-shaped pipe is welded on the inner wall of the outer pipe 7 in the axial direction, namely, M cavities in the axial direction, which are formed by the inner wall of the outer pipe 7, the upper end face and the lower end face of the outer pipe 7 and the inner wall of the U-shaped pipe, are formed in the inner cavity of the outer pipe 7, and the cavities are marked as surfactant injection cavities 8. M surfactant injection ports 12 penetrating the M surfactant injection chambers 8 are provided at positions corresponding to the M surfactant injection chambers 8 on the top end surface of the outer tube 7. The length of the outer tube 7 is L2, l2= 0.4L1-0.6L1.
In this embodiment, l2= 0.5L1. The gap delta is < 5mm, which ensures that the inner tube 4 can be displaced axially in the outer tube 7. The upper end face of the outer tube 7 is provided with 4 air outlets 11 which are uniformly distributed, 4 surfactant injection cavities 8 are arranged in the inner cavity of the outer tube 7, and 4 surfactant injection inlets 12 which are communicated with the surfactant injection cavities 8 are arranged on the upper end face of the outer tube 7.
Two hooks 10 are symmetrically arranged on the upper end surface of the outer tube 7, and the motor 5 is connected with the hooks 10 through a steel wire rope 6 to control the axial displacement of the inner tube 4 in the outer tube 7.
In operation, the enhanced aeration repair device is installed in an aeration well 18 by a hoisting device, and the upper end face of the inner tube 4 is flush with the ground surface.
In this embodiment, the balloon 9 is an annular high-pressure plugThe outer diameter of the air bag 9 after being inflated is D1, the inner diameter of the outer tube 7 is D3, and D1 is more than or equal to D3. The L is A1 ＝L2，L A2 ＝1/4L2。
In this embodiment, the outer diameter of the main body portion of the spherical aeration head 1 is denoted as D4, the inner diameter of the outer tube 7 is denoted as D3, and D2. Ltoreq.D4 < D3 is satisfied.
In this embodiment, the difference between the outer diameter of the outer tube 7 and the inner diameter of the aeration well 18 is noted as a gap h < 1cm.
In this embodiment, the pore diameter of the air hole 14 is 1mm-3mm, and the pore diameter of the aeration hole 2 is 6mm-10mm.
FIG. 6 is a schematic illustration of the aeration operation of the enhanced aeration remediation device of the present invention at an actual site. As can be seen from fig. 6, the enhanced aeration repair apparatus of the present invention also requires a supporting auxiliary device during operation. Specifically, the auxiliary device comprises the following three groups of auxiliary devices:
the first group includes an air pump 20, an air flow meter 21, a regulating valve 22, a switch 23, and an air injection pipe 24. In operation, one end of the gas injection pipe 24 is communicated with the gas injection port 3, and the other end is connected with the gas pump 20 through the switch 23, the pressure regulating valve 22 and the gas flowmeter 21 in sequence.
The second group includes a surfactant injection pipe 17 and a surfactant injection tank 19. In operation, the surfactant injection tank 19 communicates with the surfactant injection port 12 through the surfactant injection pipe 17.
The third group is a back pressure valve 13 which is communicated with an air outlet on the outer pipe 7 through a section of pipeline and is used for adjusting the back pressure in the aeration process.
In addition, as can be seen from fig. 6, the enhanced aeration repairing apparatus is also used together with a plurality of extraction wells 26 in operation, the extraction wells 26 are positioned in an unsaturated zone and are 2m deep, and the extraction wells 26 are communicated with an extraction pump 25 through pipelines.
The enhanced aeration repair device of the invention has the following operation:
step one, ascertaining the location and distribution of the VOCs contaminated zone 16
Specifically, in this embodiment, the VOCs pollution zone 16 is distributed in a saturated soil body with a depth of 3.5-4 meters underground, and a thickness of about 0.5m.
Step two, creation of aeration well 18 and extraction well 26
Specifically, in this embodiment, the aeration wells 18 are 4m deep with a radius of 25cm and the extraction wells 26 are located in the unsaturated zone 2m deep.
Step three, mounting of enhanced aeration repair device
The enhanced aeration repair apparatus is installed in the aeration well 18 using a hoisting apparatus, and the position of the outer tube 7 is adjusted up and down using the motor 5 according to the depth of the VOCs contaminated zone 16 so that the outer tube 7 is placed in the VOCs contaminated zone 16.
Step four, connection of auxiliary devices
The auxiliary device is connected with the enhanced aeration repairing device.
In this embodiment, the gas injection pipe 24 and the gas injection port 3 are in screw connection, the surfactant injection pipe 17 and the surfactant injection port 12 are in screw connection, the gas outlet 11 and the pipeline connected with the gas outlet are also in screw connection, and sealing rings are arranged at the joints.
Step five, injecting a surfactant
Surfactant is injected into the surrounding polluted soil body through the surfactant injection pipe 8, so that the surfactant is fully contacted with the polluted soil body.
Step six, starting aeration
Opening the switch of the air pump 20, and adjusting the pressure regulating valve 22 to a predetermined aeration pressure P1; adjusting the back pressure valve 13 to a predetermined pressure value P2;
the switch 23 and the power supply of the extraction pump 25 are turned on, the gas pumped by the air pump 20 enters the spherical aeration head 1 through the inner pipe 4, the air bags 9 gradually bulge, and the two bulged air bags 9 are tightly attached to the inner wall of the outer pipe 7, so that the outer pipe 7 is better fixed in the VOCs pollution area 16. The gas is released from the lower half of the spherical aeration head 1 through the uniformly distributed aeration holes 2, and a seepage channel is formed in the VOCs pollution area 16. VOCs enter the seepage channel through diffusion, a part volatilizes to the ground surface through air holes 14 uniformly distributed on the wall of the outer tube 7 for treatment, a part volatilizes to the unsaturated zone, and finally the ground surface is pumped out by the extraction well 26 for treatment, so that the removal of the VOCs in the soil body is achieved.
By the aeration device and the aeration method, the aeration working efficiency and the removal rate of VOCs can be greatly improved on the basis of the traditional aeration work.

Claims (4)

1. The VOCs polluted soil body enhanced aeration restoration device is characterized by comprising an inner pipe (4), an outer pipe (7), a spherical aeration head (1), two identical air bags (9) and a motor (5), wherein the inner pipe (4) and the outer pipe (7) are coaxial, and the outer pipe (7) is sleeved outside the inner pipe (4);
the inner tube (4) is a hollow circular tube with a closed top, the end face of the top of the inner tube (4) is provided with an air injection port (3), and the inner wall of the bottom of the inner tube (4) is provided with an internal thread; the upper end face of the inner pipe (4) is vertically upwards L A1 Distance and vertical upward from lower end face is L A2 The part between the distances is marked as an area A, one air bag (9) is sleeved at the top position of the area A, the other air bag (9) is sleeved at the bottom position of the area A, and a plurality of air holes I are uniformly distributed on the pipe wall of the inner pipe (4) sleeved with the air bag (9); the outer diameter of the inner tube (4) is recorded as D1, and the length is recorded as L1;
the spherical aeration head (1) is composed of a main body and a top which are integrally formed, the top is a hollow cylinder, and the main body is a hollow sphere with one end open and is communicated with the top at the open position; the outer diameter of the top is the same as the inner diameter of the inner tube (4), the outer wall is provided with external threads corresponding to the internal threads at the bottom of the inner tube (4), namely, the spherical aeration head (1) is connected with the inner tube (4) through the external threads, and the wall of the lower hemisphere of the main body is provided with aeration holes (2) which are uniformly distributed;
the top and the bottom of the outer tube (7) are both closed, through holes (15) with the diameter of D2 are respectively reserved on two end faces, d2=d1+2δ, wherein δ is a gap, the gap δ is less than 5mm, and the inner tube (4) is sleeved in the outer tube (7) through the through holes (15) and can perform displacement in the axial direction; a plurality of air holes (14) are uniformly distributed on the whole pipe wall of the outer pipe (7); four air outlets (11) which are uniformly distributed are arranged on the top end surface of the outer tube (7); four U-shaped pipes in the axial direction are uniformly welded on the inner wall of the outer pipe (7), the length of each U-shaped pipe is the same as the height of the inner cavity of the outer pipe (7), the opening end of each U-shaped pipe is welded on the inner wall of the outer pipe (7) in the axial direction, namely, four cavities in the axial direction, which are formed by the inner wall of the outer pipe (7), the upper end face and the lower end face of the outer pipe (7) and the inner wall of the U-shaped pipe, are formed in the inner cavity of the outer pipe (7), and the cavities are marked as surfactant injection cavities (8); four surfactant injection openings (12) which are communicated with the four surfactant injection cavities (8) are arranged on the top end surface of the outer tube (7) at positions corresponding to the four surfactant injection cavities (8); the length of the outer tube (7) is recorded as L2, and L2= 0.4L1-0.6L1;
two hooks (10) are symmetrically arranged on the upper end surface of the outer tube (7), the motor (5) is connected with the hooks (10) through a steel wire rope (6), and the axial displacement of the inner tube (4) in the outer tube (7) is controlled;
when the device works, the enhanced aeration repairing device is arranged in an aeration well (18) through the hoisting device, and the upper end surface of the inner pipe (4) is level with the ground surface;
the air bag (9) is an annular high-pressure blocking air bag, the outer diameter of the inflated air bag (9) is D1, the inner diameter of the outer tube (7) is D3, and the L that D1 is more than or equal to D3 is satisfied A1 =L2，L A2 =1/4L2。
2. The VOCs polluted soil body enhanced aeration restoration device according to claim 1, wherein the outer diameter of the main body part of the spherical aeration head (1) is denoted by D4, the inner diameter of the outer tube (7) is denoted by D3, and D2 is less than or equal to D4 and less than D3 is satisfied.
3. The device for reinforcing aeration restoration of a polluted soil body by VOCs according to claim 1, wherein the difference between the outer diameter of the outer tube (7) and the inner diameter of the aeration well (18) is recorded as a clearance h which is smaller than 1cm.
4. The VOCs polluted soil body enhanced aeration restoration device according to claim 1, wherein the pore diameters of the first air hole and the air hole (14) are 1mm-3mm, and the pore diameter of the aeration hole (2) is 6mm-10mm.
CN202210062997.8A 2022-01-19 2022-01-19 VOCs pollutes soil body reinforcing aeration prosthetic devices Active CN114433612B (en)

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CN115193898A (en) * 2022-06-22 2022-10-18 江苏大地益源环境修复有限公司 Underground water in-situ reagent packing and injecting device and underground water repairing method

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JP3332600B2 (en) * 1994-09-12 2002-10-07 キヤノン株式会社 Contaminated soil and groundwater purification methods
JP3728510B2 (en) * 2003-03-20 2005-12-21 武 長谷川 Soil pollution countermeasure method and soil pollution countermeasure system
KR20100002359A (en) * 2008-06-30 2010-01-07 한림대학교 산학협력단 Method for selectively removing organic pollutant from aquifer
CN202766353U (en) * 2012-09-14 2013-03-06 上海宝钢气体有限公司 Aerating device
CN109127689B (en) * 2018-08-28 2021-02-12 山东冽泉环保工程咨询有限公司 Organic contaminated site in-situ oxidation and circulating well combined repairing system
CN111589854B (en) * 2019-02-20 2022-02-01 中国石油天然气股份有限公司 Be used for prosthetic binary channels layering injection device of contaminated site normal position
CN112875881B (en) * 2021-01-25 2023-10-20 合肥工业大学 Aeration device for repairing VOCs pollution
CN113426815B (en) * 2021-07-08 2022-07-19 合肥工业大学 Method for restoring VOCs pollution of low-permeability soil body through in-situ enhanced aeration

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