Device for repairing underground water based on soil vapor extraction technology

Abstract

The utility model relates to a device for repairing underground water based on soil vapor extraction technology, which relates to the technical field of underground water treatment and comprises an extraction pipe, the extraction pipe is formed by sequentially splicing and fixing a plurality of extraction pipe units end to end, each extraction pipe unit comprises a pipe body, and an aeration channel and an air exhaust channel are respectively arranged in the pipe body along the axial direction. A plurality of aeration holes communicated with the aeration channel and exhaust holes communicated with the exhaust channel are formed in the surface of the pipe body along the axial direction; the extraction pipe unit further comprises a liquid storage ring cylinder fixedly arranged at one end of the pipe body in a sleeving mode, conical liquid outlet holes are evenly distributed in the surface of the liquid storage ring cylinder along the circumference, and a plugging device capable of freely stretching out and drawing back is arranged in each conical liquid outlet hole. The device is based on the soil vapor extraction technology, groundwater remediation is conducted through the extraction pipe unit, volatile organic compounds in groundwater are effectively treated through the arrangement of the aeration channel and the air exhaust channel, and specific chemical substances are automatically added through the liquid storage ring cylinder and the liquid outlet assembly of the liquid storage ring cylinder.

Description

TECHNICAL FIELD

[0001] The utility model belongs to groundwater treatment technical field, concretely is the device based on soil gas phase extraction technology repair groundwater. BACKGROUND

[0002] As an important source of human life and industrial water, groundwater is threatened by various pollutants, especially volatile organic compounds (VOCs) in many areas. The existing repair method generally uses soil vapor extraction technology, injects air into contaminated groundwater to promote the volatilization of volatile organic compounds, and extracts the gas containing pollutants to the ground through the air extraction system for treatment.

[0003] However, the existing extraction device has the problem of uneven aeration and air extraction, which leads to the ineffective removal of pollutants in some areas. For groundwater pollution of different depths and geological conditions, the existing repair equipment lacks sufficient flexibility and adaptability, and cannot be quickly adjusted and configured according to the specific situation on site.

[0004] In some cases, in order to improve the removal efficiency of VOCs, it is necessary to add specific chemicals (such as surfactants or pH adjusters) to the groundwater to change the form of existence of pollutants or increase their volatility. However, the current addition method mostly uses a pressure pump to extract the chemical solution from the storage tank and inject it into the groundwater through a pipeline, which is difficult to accurately control the addition amount and frequency, and is prone to overuse or deficiency. Moreover, a single injection point leads to uneven solution injection and cannot form uniform diffusion in the groundwater environment, affecting the full contact and reaction of chemicals and pollutants and affecting the repair effect.

[0005] Therefore, we provide a device for repairing groundwater based on soil vapor extraction technology to solve the above problems. SUMMARY

[0006] The purpose of the utility model is to solve the problems in the background art, and provide a device for repairing groundwater based on soil vapor extraction technology.

[0007] The utility model realizes the above-mentioned purpose through the following technical scheme:

[0008] The device for repairing groundwater based on soil vapor extraction technology comprises an extraction pipe, the extraction pipe is composed of a plurality of extraction pipe units which are sequentially connected end to end and fixed, the extraction pipe unit comprises a pipe body, the inside of the pipe body is provided with an aeration channel and an air extraction channel along the axial direction respectively, and the surface of the pipe body is provided with a plurality of aeration holes connected with the aeration channel and air extraction holes connected with the air extraction channel along the axial direction.

[0009] The extraction pipe unit further comprises a liquid storage ring cylinder fixedly sleeved at one end of the pipe body, and a plurality of tapered liquid outlet holes are uniformly arranged on the surface of the liquid storage ring cylinder in the circumferential direction.

[0010] As a further optimization scheme of the utility model, the aeration passage and the air extraction passage are both provided with a plurality of passages, and the two passages are staggered; the aeration holes and the air extraction holes are also staggered on the surface of the pipe body.

[0011] As a further optimization scheme of the utility model, the first end and the second end of the pipe body are both fixedly provided with a connecting flange, and one end of the pipe body is provided with a groove for mounting the liquid storage ring cylinder; the pipe body is further provided with a sealing member matched with the aeration passage and the air extraction passage, and the surface of the pipe body is rotatably provided with an aeration sealing ring for sealing the aeration holes and an air extraction sealing ring for sealing the air extraction holes.

[0012] As a further optimization scheme of the utility model, the liquid outlet assembly comprises an airflow driving wheel rotatably arranged at one end of the liquid storage ring cylinder, a rotating ring rotatably arranged at the other end of the liquid storage ring cylinder, and a connecting plate for fixing the two; the rotating ring is sleeved outside the tapered liquid outlet hole, and a plurality of liquid outlet pipes are uniformly arranged on the surface of the rotating ring in the circumferential direction; the liquid outlet pipes are tangentially arranged with the rotating ring.

[0013] As a further optimization scheme of the utility model, the aeration holes and the air extraction holes are both arranged on the cylindrical surface and the end surface of the pipe body, and the aeration holes on the end surface of the pipe body are used to provide airflow for the rotation of the airflow driving wheel.

[0014] As a further optimization scheme of the utility model, the liquid storage ring cylinder is further provided with a liquid outlet assembly for driving the movement of the sealing member based on the aeration airflow to realize intermittent liquid outlet.

[0015] As a further optimization scheme of the utility model, the sealing member comprises a fixed plate fixed on the surface of the liquid storage ring cylinder and a movable rod penetratingly arranged on the fixed plate, one end of the movable rod is fixedly provided with a tapered plug, the other end is provided with a round head structure, and a spring is sleeved on the movable rod between the tapered plug and the fixed plate; a plurality of recesses are arranged on the inner wall of the rotating ring in the circumferential direction.

[0016] The utility model has the advantages that:

[0017] 1、The utility model discloses an extraction pipe unit, modular design, can according to the depth of groundwater pollution area flexible adjustment length, adapt to the repair demand of different depth groundwater.

[0018] 2. The utility model discloses a set of aeration and air extraction system through the setting aeration channel, air extraction channel, aeration hole and air extraction hole, improves the repair efficiency, and the aeration hole and air extraction hole are uniformly distributed on the pipe body surface, ensure all -round coverage of aeration and air extraction, improve the processing efficiency and the uniformity of gas flow.

[0019] 3. The utility model discloses a set of aeration and air extraction system through the setting aeration channel, air extraction channel, aeration hole and air extraction hole, improves the repair efficiency, and the aeration hole and air extraction hole are uniformly distributed on the pipe body surface, ensure all -round coverage of aeration and air extraction, improve the processing efficiency and the uniformity of gas flow. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure three -dimensional schematic diagram of the utility model;

[0021] Figure 2 It is the extraction pipe unit structure schematic diagram of the utility model;

[0022] Figure 3 It is the pipe body structure schematic diagram of the utility model;

[0023] Figure 4 It is the liquid storage ring cylinder and liquid outlet subassembly structure sectional view of the utility model;

[0024] Figure 5 It is the Figure 4 It is the structure enlarged diagram of the utility model's A place;

[0025] Figure 6 It is the internal structure schematic diagram of the utility model's rotary ring.

[0026] In the drawing:

[0027] 1, extraction pipe unit;2, pipe body;201, connecting flange;202, aeration channel;203, air extraction channel;204, aeration hole;205, air extraction hole;206, groove;207, plugging piece;208, aeration closed ring;209, air extraction closed ring;3, liquid storage ring cylinder;4, liquid outlet subassembly;401, gas flow driving wheel;402, rotary ring;403, connecting plate;404, recess;405, liquid outlet pipe;5, plugging device;501, fixed plate;502, movable rod;503, conical plug;504, spring. DETAILED DESCRIPTION

[0028] The application will be further described in detail below with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0029] Embodiment one

[0030] In order to solve the problem of uneven aeration and air extraction in the existing extraction device, resulting in that some areas of pollutants cannot be effectively removed, and the existing remediation equipment lacks sufficient flexibility and adaptability for groundwater pollution in different depths and geological conditions, please refer to Figures 1-3 The device for repairing groundwater based on soil gas phase extraction technology provided by the utility model, including extraction pipe, extraction pipe is fixedly connected by a plurality of extraction pipe units 1 in turn, extraction pipe unit 1 includes pipe body 2, the inside of pipe body 2 is respectively provided with aeration channel 202 and air extraction channel 203 along the axial direction, a plurality of aeration channels 202 and air extraction channels 203 are arranged, and the two are staggered, a plurality of aeration holes 204 and air extraction holes 205 are arranged on the surface of pipe body 2 along the axial direction, the aeration holes 204 and the air extraction holes 205 are also staggered on the surface of pipe body 2. The effective treatment of volatile organic compounds in groundwater is realized by the arrangement of aeration channel 202 and air extraction channel 203, and automatic addition of specific chemicals such as surfactants or pH regulators is realized by liquid storage ring 3 and plugging device 5. The aeration and air extraction parameters and the types and addition amount of chemicals can be adjusted according to different pollution conditions, and the flexibility of the system is enhanced.

[0031] Extraction pipe unit 1 also includes liquid storage ring 3 fixedly sleeved on one end of pipe body 2, a plurality of tapered liquid outlet holes are uniformly distributed on the surface of liquid storage ring 3 along the circumference, and a free retractable plugging device 5 is arranged in each tapered liquid outlet hole, which is used for realizing dynamic plugging and opening of the tapered liquid outlet hole.

[0032] The two ends of pipe body 2 are fixedly provided with connecting flanges 201, which are used for realizing the connection between adjacent extraction pipe units 1, and one end of pipe body 2 is provided with a groove 206 for installing liquid storage ring 3.

[0033] The device is based on the depth of the groundwater pollution area, and the length of the extraction pipe unit 1 is flexibly adjusted by splicing the head and tail to adapt to the repair needs of groundwater at different depths. Based on the soil gas phase extraction technology, the groundwater is repaired through the extraction pipe unit 1. The gas is injected into the groundwater through the aeration channel 202, which promotes the transfer of volatile organic compounds from the water phase to the gas phase. Then the gas containing pollutants is extracted through the air extraction channel 203. The integrated aeration and air extraction system improves the repair efficiency. The aeration holes 204 and the air extraction holes 205 are evenly distributed on the surface of the pipe body 2, which ensures the all-round coverage of aeration and air extraction, improves the processing efficiency and the uniformity of gas flow.

[0034] Example two

[0035] Based on example one, in order to facilitate the flexible control of the aeration and air extraction process, as shown in Figure 3 , the pipe body 2 is also provided with a plugging member 207 matched with the aeration channel 202 and the air extraction channel 203 for plugging operation. The surface of the pipe body 2 is rotatably provided with an aeration closing ring 208 for closing the aeration hole 204 and an air extraction closing ring 209 for closing the air extraction hole 205, which are used to selectively close the aeration hole 204 and the air extraction hole 205 based on actual needs.

[0036] In use, the part of the extraction pipe below the groundwater level can be closed by rotating the air extraction closing ring 209 to close the air extraction hole 205, while keeping the aeration hole 204 open to inject air into the groundwater to promote the volatilization of VOCs. For the area above the groundwater level, the aeration hole 204 can be closed by rotating the aeration closing ring 208, and the air extraction hole 205 can be opened to ensure that the gas containing volatilized pollutants is effectively extracted.

[0037] Example three

[0038] Based on example one and example two, in order to further improve the repair efficiency and promote the escape of volatile organic compounds, the speed of the transfer of volatile organic compounds from the water phase to the gas phase is improved, as shown in Figures 4-6 , the liquid outlet assembly 4 for driving the plugging device 5 to move based on the aeration airflow to realize intermittent liquid outlet is also provided on the liquid storage ring cylinder 3; the liquid outlet assembly 4 includes an airflow driving wheel 401 rotatably arranged at one end of the liquid storage ring cylinder 3, a rotating ring 402 rotatably arranged at the other end of the liquid storage ring cylinder 3, and a connecting plate 403 for fixing the two; the rotating ring 402 is sleeved outside the conical liquid outlet hole, and a plurality of liquid outlet pipes 405 are evenly distributed on the surface of the rotating ring 402 in the circumferential direction.

[0039] The aeration holes 204 and the air extraction holes 205 are distributed on the cylindrical surface and the end surface of the pipe body 2. The aeration holes 204 located on the end surface of the pipe body 2 are used to provide airflow for the rotation of the airflow driving wheel 401.

[0040] The plugging device 5 comprises a fixed plate 501 fixed on the surface of the liquid storage cylinder 3 and a movable rod 502 provided through the fixed plate 501, one end of the movable rod 502 is fixedly provided with a tapered plug 503, the other end is provided with a round head structure, a spring 504 is sleeved on the movable rod 502 between the tapered plug 503 and the fixed plate 501; a plurality of recesses 404 are arranged on the inner wall of the rotating ring 402 in a circumferential distribution manner, the round head end of the movable rod 502 slides against the inner wall of the rotating ring 402, and the round head end periodically slides into and out of the recesses 404 in the sliding process, so as to periodically separate or close the tapered liquid outlet hole by the tapered plug 503, and realize the intermittent discharge of the liquid.

[0041] Part of the airflow generated in the aeration process drives the slow rotation of the airflow driving wheel 401, and then drives the rotation of the rotating ring 402, in the rotating process of the rotating ring 402, the round head end of the movable rod 502 periodically slides into and out of the recesses 404, when the round head end slides into the recesses 404, the tapered plug 503 is separated from the tapered liquid outlet hole at this time, and the spring 504 is in a normal state, when the round head end slides out of the recesses 404, the round head end abuts against the inner wall of the rotating ring 402, at this time, the tapered plug 503 is closed with the tapered liquid outlet hole, and the spring 504 is in a stretched state, the liquid in the liquid storage cylinder 3 enters into the rotating ring 402 through the tapered liquid outlet hole, and is thrown out from the plurality of liquid outlet pipes 405 by the centrifugal force of the rotating ring 402; by adding specific chemicals (such as surfactants) to the aeration process, the escape of volatile organic compounds can be more effectively promoted, the repair efficiency is improved, the automatic addition of chemicals is realized by using the aeration airflow, the manual intervention is reduced, the addition amount and frequency of the chemicals can be more accurately controlled, and the rotation of the airflow driving wheel 401 and the liquid outlet pipe 405 also plays a certain stirring role, which helps the chemicals to be more fully mixed with the groundwater, and further promotes the escape of volatile organic compounds.

[0042] The above-described embodiments only express one embodiment of the present application, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. Apparatus for remediation of groundwater based on soil vapour extraction technology comprising an extraction pipe characterised in that: The extraction pipe is composed of a plurality of extraction pipe units (1) which are sequentially connected end to end, the extraction pipe unit (1) comprises a pipe body (2), the inside of the pipe body (2) is respectively provided with an aeration channel (202) and an air extraction channel (203) in the axial direction, and the surface of the pipe body (2) is provided with a plurality of aeration holes (204) and air extraction holes (205) which are connected with the aeration channel (202) and the air extraction channel (203) in the axial direction; The extraction pipe unit (1) further comprises a liquid storage ring (3) which is fixedly sleeved on one end of the pipe body (2), and a plurality of tapered liquid outlet holes are uniformly distributed on the surface of the liquid storage ring (3) in the circumferential direction, and each of the tapered liquid outlet holes is provided with a free retractable obturator (5) for realizing dynamic plugging and opening of the tapered liquid outlet hole.

2. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 1, characterized in that: The aeration channel (202) and the air extraction channel (203) are both provided with a plurality of holes, and the two holes are staggered. The aeration holes (204) and the air extraction holes (205) are also staggered on the surface of the pipe body (2).

3. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 1, characterized in that: The pipe body (2) is provided with a connecting flange (201) at both ends, and one end of the pipe body (2) is provided with a groove (206) for mounting the liquid storage ring (3); The pipe body (2) is further provided with a plugging part (207) which is matched with the aeration channel (202) and the air extraction channel (203), and the surface of the pipe body (2) is respectively provided with an aeration closing ring (208) for closing the aeration hole (204) and an air extraction closing ring (209) for closing the air extraction hole (205).

4. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 1, characterized in that: The liquid storage ring (3) is further provided with a liquid outlet assembly (4) for driving the obturator (5) to move based on the aeration airflow to realize intermittent liquid outlet.

5. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 4, characterized in that: The liquid outlet assembly (4) comprises an airflow driving wheel (401) which is rotatably arranged at one end of the liquid storage ring (3), a rotating ring (402) which is rotatably arranged at the other end of the liquid storage ring (3), and a connecting plate (403) for fixing the two. The rotating ring (402) is sleeved outside the tapered liquid outlet hole, and a plurality of liquid outlet pipes (405) are uniformly distributed on the surface of the rotating ring (402) in the circumferential direction, and the liquid outlet pipes (405) are tangentially arranged with the rotating ring (402).

6. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 5, characterized in that: The aeration holes (204) and the air extraction holes (205) are distributed on the cylindrical surface and the end surface of the pipe body (2), and the aeration holes (204) on the end surface of the pipe body (2) are used to provide airflow for rotating the airflow driving wheel (401).

7. The apparatus for remediating groundwater based on soil vapor extraction technology according to claim 6, characterized in that: The obturator (5) comprises a fixed plate (501) fixed on the surface of the liquid storage ring (3) and a movable rod (502) penetratingly arranged on the fixed plate (501), one end of the movable rod (502) is fixedly provided with a tapered plug (503), the other end is provided with a round head structure, and a spring (504) is sleeved on the movable rod (502) between the tapered plug (503) and the fixed plate (501); The inner wall of the rotating ring (402) is provided with a plurality of recesses (404) which are uniformly distributed in the circumferential direction.

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