A groundwater treatment mechanism

Abstract

The application relates to a groundwater treatment mechanism applied in the field of environmental remediation, which comprises an aeration device and a collecting device arranged in a remediation well, the aeration device is used for aerating groundwater in the remediation well, the collecting device comprises a collecting unit and a lifting unit, the collecting unit is used for collecting oil phase substances in the aerated groundwater, and the lifting unit is used for driving the collecting unit to lift. The application has the technical effect that the aeration device is started to aerate the groundwater in the remediation well, the oil phase substances in the groundwater are made to float to the vicinity of the water level line of the groundwater through aeration, the lifting unit is started to drive the collecting unit to lift to the vicinity of the water level line of the groundwater, the collecting unit collects the oil phase substances in the aerated groundwater, the lifting unit is started again to drive the collecting unit to ascend to the ground for centralized collection and treatment after the collection is completed, high-concentration oil phase substances in the groundwater are reduced, and the difficulty of subsequent soil and groundwater treatment work is reduced.

Description

Technical Field

[0001] This application relates to the field of environmental remediation technology, and in particular to a groundwater treatment facility. Background Technology

[0002] The rapid pace of industrialization and urbanization has spurred the transformation of traditional industrial enterprises, leaving behind a large number of industrial waste sites in and around cities. Traditional chemical, metal smelting, and petroleum processing industries, among others, use organic compounds as raw materials or intermediate products. These compounds enter the soil through leaks and spills during production, transportation, and storage. Organic pollutants are characterized by their diversity, high mobility, and persistent pollution, making them difficult to remove through natural degradation. Therefore, organic pollutants are one of the main types of pollutants in my country's soil and groundwater.

[0003] In related technologies, in-situ chemical oxidation technology is mainly used for the remediation or treatment of organically contaminated sites. This involves directly injecting strong oxidants into the contaminated area in situ, and degrading organic pollutants into low-toxicity and harmless intermediate products through oxidation reactions, thereby reducing the concentration of pollutants.

[0004] In the process of treating contaminated sites using the above-mentioned in-situ chemical oxidation technology, due to the presence of high concentrations of oil-phase substances in some sites, the in-situ chemical oxidation technology could not achieve the remediation target after adding a large amount of reagents. This made subsequent soil and groundwater remediation work difficult, resulting in the downstream sewage treatment plant frequently experiencing substandard effluent quality. Summary of the Invention

[0005] To address the problem that in-situ chemical oxidation technology fails to achieve remediation goals in contaminated sites due to the presence of high concentrations of oil-phase substances, even with the addition of large amounts of chemicals, leading to difficulties in subsequent soil and groundwater remediation and frequent substandard effluent quality at downstream wastewater treatment plants, this application provides a groundwater treatment mechanism. The mechanism includes an aeration device and a collection device installed within a remediation well. The aeration device aerates the groundwater within the well, and the collection device comprises a collection unit and a lifting unit. The collection unit collects the oil-phase substances from the aerated groundwater, and the lifting unit drives the collection unit to move up and down.

[0006] In one specific implementation, the aeration device includes an aeration unit, the air outlet of which is connected to an aeration pipe, and the end of the aeration pipe facing away from the aeration unit extends into the groundwater.

[0007] In one specific implementation scheme, the end of the aeration pipe facing away from the aeration device is provided with an aeration head, and the aeration head is provided with a plurality of aeration holes.

[0008] In one specific implementation, the aeration device uses a blower, and the aeration pipe is connected to the air outlet of the blower.

[0009] In one specific implementation, the collection unit includes a collection box disposed inside the repair well, and the outer peripheral wall of the collection box has a plurality of collection holes.

[0010] In one specific implementation, the lifting unit includes a lifting device, the output end of which is provided with a lifting rope connected to the top of the collection box.

[0011] In one specific implementation scheme, the system further includes a temporary storage tank and an extraction pump, wherein the outlet end of the extraction pump is connected to the temporary storage tank, the inlet end of the extraction pump is connected to an injection pipe, and the end of the injection pipe opposite to the extraction pump extends into the groundwater.

[0012] In one specific implementation, the repair well is provided with a corrugated pipe on its wall, and groundwater is located at the inner edge of the corrugated pipe.

[0013] In one specific implementation, filter material is provided between the corrugated pipe and the well wall of the repair well.

[0014] In one specific implementation, a cohesive soil is provided between the corrugated pipe and the well wall of the repair well, and the cohesive soil is located between the filter material and the ground.

[0015] In summary, this application has the following beneficial technical effects: When it is necessary to treat oil phase substances in contaminated sites, the aeration device is activated to aerate the groundwater in the remediation well. Through aeration, the oil phase substances in the groundwater float to the vicinity of the groundwater level. The lifting unit is then activated to drive the collection unit to rise to the vicinity of the groundwater level. The collection unit collects the oil phase substances in the aerated groundwater. After collection, the lifting unit is activated again to drive the collection unit to rise to the ground for centralized collection and treatment, thereby reducing the high concentration of oil phase substances in the groundwater and reducing the difficulty of subsequent soil and groundwater treatment work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the structure of the aeration pipe in the embodiments of this application.

[0018] Reference numerals: 1. Aeration device; 101. Aeration pipe; 102. Aeration head; 103. Collection box; 104. Injection pipe; 2. Temporary storage tank; 3. Blower; 4. Lifting equipment; 5. Corrugated pipe; 6. Extraction pump; 7. Filter media; 8. Clay; 9. Lifting rope; 10. Aeration hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0020] This application discloses a groundwater treatment facility.

[0021] Reference Figure 1 and Figure 2 The groundwater treatment facility includes an aeration device 1 and a collection device installed inside the remediation well. The aeration device 1 aerates the groundwater in the remediation well, and the collection device includes a collection unit and a lifting unit. The collection unit collects oil-phase substances from the aerated groundwater, and the lifting unit drives the collection unit to move up and down. Therefore, when it is necessary to treat oil-phase substances in a contaminated site, the aeration device 1 is activated to aerate the groundwater in the remediation well. Aeration causes the oil-phase substances in the groundwater to float to near the groundwater level. The lifting unit is then activated to drive the collection unit to move up and down to near the groundwater level, where the collection unit collects the oil-phase substances from the aerated groundwater. After collection, the lifting unit is activated again to raise the collection unit to the surface for centralized collection and treatment, reducing the high concentration of oil-phase substances in the groundwater and lowering the difficulty of subsequent soil and groundwater treatment work.

[0022] Because oil-phase substances typically have low density, they easily float to the surface of groundwater, forming an oil film. They also have high viscosity and poor fluidity, making them difficult to remove completely using conventional extraction systems. Related technologies primarily employ extraction / injection treatment techniques or in-situ chemical oxidation techniques for the remediation or treatment of organically contaminated sites. However, some sites contain high concentrations of oil-phase substances, and in-situ chemical oxidation techniques, even with the addition of large amounts of reagents, fail to achieve the remediation goals. Extraction / injection treatment techniques struggle to separate and extract oil-phase substances from groundwater, often resulting in substandard effluent quality at downstream wastewater treatment plants. This application's embodiment utilizes aeration to promote the floating and aggregation of oil-phase substances, which are then precisely collected near the waterline using a dedicated collection unit. This directly treats high concentrations of oil-phase substances in contaminated groundwater, reducing the burden of subsequent treatment at the source and improving the economics of subsequent groundwater remediation. It is suitable for contaminated sites with high oil concentrations and poor treatment effects from traditional techniques.

[0023] Reference Figure 1 and Figure 2The aeration device 1 includes an aeration unit, which employs a blower 3. An aeration pipe 101 is connected to the air outlet of the blower 3. In this embodiment, other air-blowing devices from related technologies may also be used, and no limitation is made here. The air outlet of the aeration unit is connected to the aeration pipe 101. One end of the aeration pipe 101, away from the aeration unit, extends into the groundwater. In this embodiment, the aeration pipe 101 is made of a rubber hose, and its flexibility is high. An aeration head 102 is installed at the end of the aeration pipe 101 away from the aeration unit. Several aeration holes 10 are provided on the aeration head 102, evenly distributed on the outer peripheral wall of the aeration pipe 101. The multiple aeration holes 10 on the aeration head 102 allow gas to enter the water from different directions in the form of bubbles. Compared to a single large hole or direct exhaust through a pipe, the bubbles can contact the groundwater more efficiently. As the bubbles rise in the water, they facilitate the uplift of oil-phase substances to the vicinity of the water surface.

[0024] Reference Figure 1 and Figure 2 The collection unit includes a collection box 103 installed inside the repair well. Several collection holes are formed on the outer peripheral wall of the collection box 103. In this embodiment, the collection holes are located near the top of the collection box 103. The lifting unit includes a lifting device 4. A lifting rope 9 connected to the top of the collection box 103 is installed at the output end of the lifting device 4. In this embodiment, the lifting device 4 can be a winch. The lifting rope 9 is located at the output end of the winch, and a hook is installed at the end of the lifting rope 9 facing away from the winch. Four lifting rings are evenly distributed on the top of the collection box 103, and the hook of the lifting rope 9 is connected to the four lifting rings by a connecting rope. In this embodiment, the lifting device 4 can also be a small hoist or other related lifting device 4.

[0025] Reference Figure 1 and Figure 2 The system also includes a temporary storage tank 2 and an extraction pump 6. In this embodiment, the temporary storage tank 2 is made of plastic. The outlet end of the extraction pump 6 is connected to the temporary storage tank 2, and the inlet end of the extraction pump 6 is connected to an injection pipe 104. The end of the injection pipe 104 facing away from the extraction pump 6 extends into the groundwater. In this embodiment, the injection pipe 104 is a rigid solid pipe. Therefore, when it is necessary to extract groundwater from the repair well, the injection pipe 104 is inserted into the bottom of the repair well, and the extraction pump 6 is started to inject the groundwater into the temporary storage tank 2 for temporary storage. This helps the surrounding groundwater to flow back into the repair well. The groundwater temporarily stored in the temporary storage tank 2 can also be transported to a sewage treatment plant for subsequent centralized treatment. At the same time, if the groundwater in the repair well does not require aeration treatment, the extraction pump 6 can be started directly to inject the groundwater into the temporary storage tank 2 and then transported to the next process.

[0026] Reference Figure 1 and Figure 2A corrugated pipe 5 is installed on the well wall of the repair well. Groundwater is located at the inner edge of the corrugated pipe 5. In this embodiment, the corrugated pipe 5 has slits or flow holes in its wall, allowing groundwater around the repair well to flow into it through the slits. Filter media 7 and cohesive soil 8 are filled between the corrugated pipe 5 and the well wall. The cohesive soil 8 is located between the filter media 7 and the ground surface. L in the attached diagram represents the dividing line between the cohesive soil 8 and the filter media 7. In this embodiment, the cohesive soil 8 is bentonite. Bentonite acts as an isolation agent for the soil around the repair well and has good water absorption, reducing interference from the surrounding soil. In this embodiment, the filter media 7 can be quartz sand, which acts as a filter, initially filtering large particles of impurities from the groundwater.

[0027] The implementation principle of this application embodiment is as follows: When it is necessary to treat the oil phase substances of the contaminated site, the collection box 103 is hoisted to the lifting end of the lifting device 4, and the collection box 103 is lowered to below the groundwater level in the remediation well, so that the collection hole on the collection box 103 is near the groundwater level. The blower 3 is started to blow air into the aeration pipe 101, and the gas is evenly diffused in the remediation well through the aeration head 102 to avoid local aeration being too strong or too weak. The aeration generates bubbles that carry the oil phase substances to the vicinity of the groundwater level. The oil phase substances enter the collection box 103 through the collection hole. After the collection box 103 stays for 1 to 2 minutes, the lifting device 4 is started again to lift the collection box 103 to the ground. Then the operator pours the oil phase substances in the collection box 103 into the waste bin for unified collection and treatment. The above steps are repeated until the concentration of oil phase substances in the groundwater in the remediation well meets the preset preliminary treatment standard after laboratory testing.

[0028] In this embodiment, aeration is used to promote the floating and aggregation of oil phase substances, which are then accurately collected near the water level by a dedicated collection unit. This method can directly treat high concentrations of oil phase substances in polluted groundwater, reduce the burden of subsequent treatment from the source, and improve the economics of subsequent groundwater remediation. It is suitable for polluted sites with high oil phase concentrations and poor treatment effects of traditional technologies, reducing the high concentration of oil phase substances in groundwater and lowering the difficulty of subsequent soil and groundwater treatment.

[0029] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A groundwater treatment mechanism, characterized by: The application relates to an aeration device (1) arranged in a remediation well for aerating underground water in the remediation well and a collecting device comprising a collecting unit for collecting oil phase substances in the aerated underground water and a lifting unit for driving the collecting unit to lift and lower.

2. The groundwater treatment mechanism according to claim 1, characterized by: The aeration device (1) comprises an aeration equipment, and an aeration pipe (101) is communicated with the air outlet end of the aeration equipment, and the end of the aeration pipe (101) away from the aeration equipment extends into the underground water.

3. The groundwater treatment mechanism according to claim 2, characterized in that: The end of the aeration pipe (101) away from the aeration equipment is provided with an aeration head (102), and a plurality of aeration holes (10) are formed in the aeration head (102).

4. The groundwater treatment mechanism according to claim 2, characterized by: The aeration equipment adopts a blower (3), and the aeration pipe (101) is communicated with the air outlet end of the blower (3).

5. The groundwater treatment mechanism of claim 1, wherein: The collecting unit comprises a collecting box (103) arranged in the remediation well, and a plurality of collecting holes are formed in the peripheral wall of the collecting box (103).

6. The groundwater treatment mechanism according to claim 5, characterized in that: The lifting unit comprises lifting equipment (4), and the output end of the lifting equipment (4) is provided with a lifting rope (9) connected with the top of the collecting box (103).

7. The groundwater treatment mechanism of claim 1, wherein: The application further comprises a temporary storage tank (2) and an extraction pump (6), the liquid outlet end of the extraction pump (6) is communicated with the temporary storage tank (2), the liquid inlet end of the extraction pump (6) is communicated with an extraction and injection pipe (104), and the end of the extraction and injection pipe (104) away from the extraction pump (6) extends into the underground water.

8. The groundwater treatment mechanism of claim 1, wherein: The well wall of the remediation well is provided with a corrugated pipe (5), and the underground water is located at the inner edge of the corrugated pipe (5).

9. The groundwater treatment mechanism of claim 8, wherein: The filter material (7) is arranged between the corrugated pipe (5) and the well wall of the remediation well.

10. The groundwater treatment mechanism of claim 8, wherein: The viscous soil (8) is arranged between the corrugated pipe (5) and the well wall of the remediation well, and the viscous soil (8) is located between the filter material (7) and the ground.

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