Secondary aeration vertical permeability enhanced circulation well

Abstract

This utility model belongs to the field of groundwater remediation, specifically relating to a secondary aeration vertical infiltration enhanced circulation well, including an outer well pipe, an inner well pipe, and an intermediate pipe disposed between the outer and inner well pipes; aeration heads are independently installed between the intermediate pipe and the inner well pipe, as well as within the inner well pipe. The technical solution of this application achieves hydraulic backflow by setting an intermediate pipe between the outer and inner well pipes, and achieves secondary aeration by installing aeration heads between the intermediate pipe and the inner well pipe, as well as within the inner well pipe, thereby effectively removing volatile organic pollutants from the groundwater and improving remediation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater remediation, specifically relating to a secondary aeration vertical infiltration enhanced circulation well. Background Technology

[0002] Volatile organic pollutants (VOCs) in groundwater are volatile and biodegradable. Exposure pathways are mainly divided into: (1) direct consumption of contaminated groundwater, which can lead to acute poisoning, such as benzene-induced damage to the hematopoietic system; (2) vapor inhalation, where VOCs penetrate indoor air through soil gases, such as vapor penetrating basements, triggering a "vapor intrusion" effect; and (3) skin contact, absorbed through the skin during bathing or agricultural water use. Typical health effects of VOCs include carcinogenicity, neurotoxicity, liver and kidney damage, and reproductive toxicity.

[0003] Groundwater circulation well remediation technology, as a remediation technique for treating in-situ volatile organic pollutants, has been increasingly widely used in contaminated site remediation projects in recent years. However, groundwater circulation well remediation technology is limited by the length of the outer well pipe, which restricts the distance that groundwater can travel within the well pipe for remediation, making it prone to incomplete remediation during the aeration process. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a secondary aeration vertical permeability enhanced circulation well.

[0005] To achieve the above objectives, this utility model adopts the following technical solution:

[0006] A secondary aeration vertical permeability enhanced circulation well includes an outer well pipe, an inner well pipe, and an intermediate pipe disposed between the outer well pipe and the inner well pipe.

[0007] The outer well casing includes an upper sealed outer well casing and a lower perforated outer well casing; the sealed outer well casing is an outer well casing with closed ends; the perforated outer well casing is provided with perforated outer well casing.

[0008] A self-priming pump is installed inside the outer well pipe with a perforated hole and is connected to the inner well pipe;

[0009] The top of the inner well pipe is connected to the intermediate pipe;

[0010] The top of the intermediate pipe is closedly connected to the top of the outer well pipe, and the bottom of the intermediate pipe is provided with a perforated hole that communicates with the end-sealed outer well pipe.

[0011] A groundwater outlet is provided below the groundwater level of the sealed external well pipe;

[0012] Aeration heads are independently installed between the intermediate pipe and the inner well pipe, as well as inside the inner well pipe.

[0013] The groundwater outlet is equipped with an inclined well pipe.

[0014] The aeration head is connected to a central control system located on the ground via an aeration pipeline.

[0015] The top of the external well pipe is provided with an exhaust port; the exhaust port is connected to the exhaust gas treatment system through an exhaust pipe; a vacuum pump is installed on the exhaust pipe.

[0016] The aeration head set between the intermediate pipe and the inner well pipe is the first aeration head; the aeration head set inside the inner well pipe is the second aeration head; the first aeration head is set at the middle position of the flower hole in the intermediate pipe; the second aeration head is set 10-20cm above the self-priming pump.

[0017] The outer well pipe has a diameter of 40-50cm; the outer well pipe has a perforation length of 20-50cm; the middle pipe has a diameter of 40-50cm; and the middle pipe has a perforation length of 20-50cm.

[0018] The diameter of the inclined well casing is 10-20 cm.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The technical solution of this application achieves hydraulic recirculation by setting an intermediate pipe between the outer well pipe and the inner well pipe, and achieves secondary aeration by setting aeration heads between the intermediate pipe and the inner well pipe and inside the inner well pipe, thereby effectively removing volatile organic pollutants from the groundwater and improving remediation efficiency.

[0021] Meanwhile, the installation of the lateral inclined well pipe will allow the clean groundwater after repair to quickly replenish the groundwater aquifer, which can expand the repair influence radius of the groundwater circulation well and further improve the repair efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the secondary aeration vertical permeation enhancement circulation well of this utility model; Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0024] Figure 1 A secondary aeration vertical permeability enhancement circulation well is shown, including an outer well pipe 6, an inner well pipe 8, and an intermediate pipe 7 disposed between the outer well pipe and the inner well pipe;

[0025] The outer well casing includes an upper sealed outer well casing and a lower perforated outer well casing; the sealed outer well casing is an outer well casing with closed ends; the perforated outer well casing is provided with perforated outer well casing.

[0026] A self-priming pump 11 is installed inside the outer well pipe with a perforated hole and is connected to the inner well pipe 8;

[0027] The top of the inner well pipe 8 is connected to the intermediate pipe 7;

[0028] The top of the intermediate pipe 8 is closedly connected to the top of the outer well pipe 6, and the bottom is provided with a perforated hole in the intermediate pipe that communicates with the end-sealed outer well pipe.

[0029] A groundwater outlet is provided below the groundwater level of the sealed external well pipe;

[0030] An aeration head is independently installed between the intermediate pipe and the inner well pipe, and also inside the inner well pipe. The aeration head installed between the intermediate pipe and the inner well pipe is the first aeration head; the aeration head installed inside the inner well pipe is the second aeration head; the first aeration head is located in the middle of the perforation in the intermediate pipe; the second aeration head is located 10-20 cm above the self-priming pump.

[0031] The water flow path for groundwater remediation is as follows: a self-priming pump draws contaminated groundwater into the inner well pipe through the perforation of the outer well pipe, and aerates it through the second aeration head inside the inner well pipe. Then, the groundwater enters the intermediate pipe through the top of the inner well pipe, and enters the closed end outer well pipe at the top of the outer well pipe through the perforation of the intermediate pipe at the bottom of the intermediate pipe. It undergoes secondary enhanced aeration through the first aeration head, and the remediated groundwater flows out through the groundwater outlet set on the closed end outer well pipe.

[0032] As a preferred embodiment, the groundwater outlet is equipped with an inclined well pipe, through which groundwater flows out. This allows the cleaned groundwater after repair to quickly replenish the groundwater aquifer, expanding the repair influence radius of the groundwater circulation well and further improving repair efficiency.

[0033] Specifically, in the embodiments of this application, the aeration head 10 is connected to a central control system 1 located on the ground via an aeration pipeline for controlling the aeration head 10. The first aeration head is connected to the central control system 1 via a first pipeline 4, and the second aeration head is connected to the central control system 1 via a second pipeline 5. An exhaust port is provided at the top of the outer well pipe; the exhaust port is connected to the exhaust gas treatment system 5 via an exhaust pipeline 3; a vacuum pump 12 is installed on the exhaust pipeline. The diameter of the outer well pipe is 40-50 cm; the length of the perforated hole in the outer well pipe is 20-50 cm; the diameter of the intermediate pipe is 40-50 cm; the length of the perforated hole in the intermediate pipe is 20-50 cm. The diameter of the inclined well pipe is 10-20 cm.

[0034] The secondary aeration vertical permeability enhancement circulation well using the method described in this application includes the following sequence and steps:

[0035] a. Determine the well location and depth based on the hydrogeological conditions of the groundwater pollution area, and drill circulation wells using a drilling rig, with the final hole located 20-50cm below the deepest point of the polluted groundwater.

[0036] b. Determine the length of the outer well pipe 6 of the groundwater circulation well according to the well depth. Set the length of the side inclined well pipe 9 of 100-150cm in the outer well pipe 6. Set the length of the outer well pipe flower hole at the bottom of the outer well pipe of 20-50cm according to the pollution conditions.

[0037] c. The groundwater contaminated with volatile organic compounds is pumped into the inner well pipe 8 by the self-priming pump 11;

[0038] d. The aeration flow rate and time of the aeration head 10 are controlled by the main control system 1;

[0039] e. The volatile organic pollutants generated by aeration stripping are collected by vacuum pump 12 and sent to the exhaust gas treatment system 5.

[0040] f. Clean groundwater is circulated into the groundwater aquifer through the inclined well pipe 9.

[0041] G. Regular maintenance and upkeep are required for the aeration head 10, vacuum pump 12, and exhaust gas treatment system 5.

[0042] In summary, the technical solution of this application achieves hydraulic backflow by setting an intermediate pipe between the outer well pipe and the inner well pipe, and achieves secondary aeration by setting aeration heads between the intermediate pipe and the inner well pipe and inside the inner well pipe, thereby effectively removing volatile organic pollutants from the groundwater and improving remediation efficiency.

[0043] Meanwhile, the installation of the lateral inclined well pipe will allow the clean groundwater after repair to quickly replenish the groundwater aquifer, which can expand the repair influence radius of the groundwater circulation well and further improve the repair efficiency.

[0044] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A secondary aeration vertical permeability enhanced circulation well, characterized in that, It includes an outer well casing, an inner well casing, and an intermediate pipe disposed between the outer well casing and the inner well casing; The outer well casing includes an upper sealed outer well casing and a lower perforated outer well casing; the sealed outer well casing is an outer well casing with closed ends; the perforated outer well casing is provided with perforated outer well casing. A self-priming pump is installed inside the outer well pipe with a perforated hole and is connected to the inner well pipe; The top of the inner well pipe is connected to the intermediate pipe; The top of the intermediate pipe is closedly connected to the top of the outer well pipe, and the bottom of the intermediate pipe is provided with a perforated hole that communicates with the end-sealed outer well pipe. A groundwater outlet is provided below the groundwater level of the sealed external well pipe; Aeration heads are independently installed between the intermediate pipe and the inner well pipe, as well as inside the inner well pipe.

2. The secondary aeration vertical permeability enhancement circulation well according to claim 1, characterized in that, The groundwater outlet is equipped with an inclined well pipe.

3. The secondary aeration vertical permeability enhancement circulation well according to claim 1, characterized in that, The aeration head is connected to a central control system located on the ground via an aeration pipeline.

4. The secondary aeration vertical permeability enhancement circulation well according to claim 1, characterized in that, The top of the external well pipe is provided with an exhaust port; the exhaust port is connected to the exhaust gas treatment system through an exhaust pipe; a vacuum pump is installed on the exhaust pipe.

5. The secondary aeration vertical permeability enhancement circulation well according to claim 1, characterized in that, The aeration head set between the intermediate pipe and the inner well pipe is the first aeration head; the aeration head set inside the inner well pipe is the second aeration head; the first aeration head is set at the middle position of the flower hole in the intermediate pipe; the second aeration head is set 10-20cm above the self-priming pump.

6. The secondary aeration vertical permeability enhancement circulation well according to claim 1, characterized in that, The outer well pipe has a diameter of 40-50cm; the outer well pipe has a perforation length of 20-50cm; the middle pipe has a diameter of 40-50cm; and the middle pipe has a perforation length of 20-50cm.

7. The secondary aeration vertical permeability enhancement circulation well according to claim 2, characterized in that, The diameter of the inclined well casing is 10-20 cm.

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