CN113336347A - Polluted groundwater remediation system - Google Patents
Polluted groundwater remediation system Download PDFInfo
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- CN113336347A CN113336347A CN202110589733.3A CN202110589733A CN113336347A CN 113336347 A CN113336347 A CN 113336347A CN 202110589733 A CN202110589733 A CN 202110589733A CN 113336347 A CN113336347 A CN 113336347A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention belongs to the technical field of groundwater treatment, and provides a polluted groundwater remediation system, because an extraction device can extract the polluted groundwater and discharge the polluted groundwater into a primary sedimentation tank, the polluted groundwater is subjected to precipitation treatment in the primary sedimentation tank in advance, solid pollutants in the polluted groundwater can be removed, and the subsequent remediation treatment is convenient; the supernatant in the primary sedimentation tank enters a gas-water separation device in an overflow mode, gas pollutants in the underground water are separated under the action of the gas-water separation device, and the underground water after sedimentation treatment is treated by a gas phase treatment device; and treating the residual liquid pollutants and the polluted underground water through a liquid phase treatment device to obtain the repaired underground water. Therefore, the polluted underground water restoration system has a simple structure and lower restoration cost, and simultaneously restores multiphase pollutants in the polluted underground water more thoroughly to avoid secondary pollution.
Description
Technical Field
The invention belongs to the technical field of groundwater treatment, and particularly relates to a polluted groundwater remediation system.
Background
With the rise of the domestic soil and groundwater remediation industry, the multiphase extraction remediation technology is also continuously developed as the main remediation technology for the pollution remediation of volatile organic compounds in soil and groundwater. The multiphase extraction repair technology is an in-situ soil and underground water repair technology for simultaneously extracting polluted soil gas, polluted underground water and non-aqueous phase liquid in an underground aeration zone and a saturation zone to the ground for treatment, and is applicable to a wide range of target pollutant types of soil and underground water.
Conventional multiphase extraction systems can be classified into two types, single pump systems and dual pump systems. The single-pump system only adopts the vacuum pump to simultaneously complete the extraction of gas and liquid in the underground pollution area, the double-pump system needs to be simultaneously provided with the vacuum pump and the extraction pump to respectively extract the gas and the liquid in the underground pollution area, and the two multiphase extraction systems have the problems of higher treatment cost, incomplete repair, easy generation of secondary pollution and the like.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a contaminated groundwater remediation system.
The invention provides a polluted groundwater remediation system for remediating polluted groundwater, which is characterized by comprising the following components: the extraction device is used for extracting the polluted underground water; the primary sedimentation tank is used for pretreating the polluted underground water extracted by the extraction device to obtain pretreated underground water; the gas-water separation device is communicated with the primary sedimentation tank and is provided with an air outlet and a liquid outlet, the gas-water separation device is used for carrying out gas-water separation treatment on the pretreated underground water, the separated gas is discharged from the air outlet, and the separated liquid is discharged from the liquid outlet; a gas phase treatment device for treating gas; and the liquid phase treatment device is used for treating the liquid.
In the contaminated groundwater remediation system provided by the present invention, there may be a feature further comprising: and the flowmeter is arranged on a pipeline between the extraction device and the primary sedimentation tank and is used for measuring the flow of the polluted underground water discharged into the primary sedimentation tank by the extraction device.
In the contaminated groundwater remediation system provided by the present invention, there may be a feature further comprising: and the vacuum gauge is arranged on the pipeline between the extraction device and the primary sedimentation tank and is used for measuring the pressure in the pipeline.
In the contaminated groundwater remediation system provided by the present invention, there may be a feature further comprising: the air blower, wherein, air blower and gas-water separation device intercommunication for increase the gaseous area of contact with the air in the groundwater, accelerate the gaseous diffusion velocity in the groundwater, make groundwater gas-liquid separation more thorough.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: the extraction device comprises an extraction well and a pump, the extraction well is arranged underground, the pump is used for communicating the extraction well with the primary sedimentation tank, and the pump is used for pumping the polluted underground in the extraction well into the primary sedimentation tank.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: the gas treatment unit is communicated with the exhaust port and is used for treating gas exhausted from the exhaust port to obtain treated gas; the gas discharge unit is communicated with the gas treatment unit and is provided with a gas outlet, and the treated gas is discharged to the atmosphere through the gas outlet.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: wherein, gas outlet is provided with gas sampling detection device, and gas sampling detection device is used for following gaseous sampling detection after handling.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: the liquid phase treatment device is communicated with the liquid outlet and is used for treating liquid discharged from the liquid outlet to obtain treated liquid.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: the liquid phase treatment device is provided with a liquid outlet, treated liquid is discharged from the liquid outlet, and a liquid sampling detection device is arranged at the liquid outlet and used for sampling and detecting the treated liquid.
In the polluted groundwater remediation system provided by the invention, the system can also have the following characteristics: wherein the liquid outlet is in communication with the groundwater piping network inlet for discharging the treated liquid into the groundwater piping network.
Action and Effect of the invention
According to the polluted underground water remediation system, the polluted underground water can be extracted and discharged into the primary sedimentation tank by the extraction device, and is subjected to precipitation treatment in the primary sedimentation tank in advance, so that solid pollutants in the polluted underground water can be removed, and the subsequent remediation treatment is facilitated; the supernatant in the primary sedimentation tank enters a gas-water separation device in an overflow mode, gas pollutants in the underground water are separated under the action of the gas-water separation device, and the underground water after sedimentation treatment is treated by a gas phase treatment device; and treating the residual liquid pollutants and the polluted underground water through a liquid phase treatment device to obtain the repaired underground water. Therefore, the polluted underground water restoration system has a simple structure and lower restoration cost, and simultaneously restores multiphase pollutants in the polluted underground water more thoroughly to avoid secondary pollution.
Drawings
FIG. 1 is a schematic structural view of a contaminated groundwater remediation system in an embodiment of the present invention;
figure 2 is a schematic view of a well tubular according to an embodiment of the invention.
Description of the figure numbering: the system comprises a polluted underground water remediation system 100, an extraction device 1, a primary sedimentation tank 2, a gas-water separation device 3, a gas phase treatment device 4, a liquid phase treatment device 5, a flowmeter 6, a vacuum meter 7, a blower 8, a gas sampling detection device 9, a liquid sampling detection device 10, an extraction well 11, a pump 12, a first pipeline 13, a second pipeline 14, an exhaust port 15, a liquid discharge port 16, a gas treatment unit 17, a gas discharge unit 18, a gas outlet 19, a liquid outlet 20, an underground water pipe network inlet 21, a well pipe 22, a solid pipe 23 and a kerf sieve pipe 24, wherein the bottom is a sedimentation pipe 25.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described in the contaminated groundwater remediation system of the invention with reference to the accompanying drawings.
< example >
This example details the specific structure and operation of a contaminated groundwater remediation system.
Fig. 1 is a schematic structural view of a contaminated groundwater remediation system in this embodiment.
As shown in fig. 1, the contaminated groundwater remediation system 100 includes an extraction device 1, a primary sedimentation tank 2, a gas-water separation device 3, a gas phase treatment device 4, a liquid phase treatment device 5, a flow meter 6, a vacuum meter 7, a blower 8, a gas sampling detection device 9, and a liquid sampling detection device 10.
The extraction device 1 comprises an extraction well 11 and a pump 12. The extraction well 11 is installed underground and has a well pipe 22 (see fig. 2).
Fig. 2 is a schematic view of the construction of a well casing according to an embodiment of the invention, and as shown in fig. 2, an extraction well 1 is provided with a well casing 22 inside, the upper part of the well casing 22 is a solid pipe 23, the middle part is a slotted screen 24, and the bottom part is a settling pipe 25. The solid pipe 23 between the well pipe 22 and the extraction well 11 is partially filled with bentonite, and the slotted sieve pipe 24 and the settling pipe 25 are partially filled with quartz sand, wherein the quartz sand is fine white grade and has the specification of 2-3 mm.
The pump 12 is a water ring vacuum pump and is communicated with the extraction well 11 through a first pipeline 13, the pump 12 is provided with an input end and an output end, the input end is communicated with the well pipe 22, and the output end is communicated with the primary sedimentation tank 2.
The flow meter 6 is installed on the first pipe 13 between the extraction well 11 and the pump 12, and can measure the flow rate of the contaminated groundwater discharged into the primary sedimentation tank 2 from the extraction well 11 in real time. In the present embodiment, the flow meter 6 is a glass rotameter.
The vacuum gauge 7 is arranged on the first pipeline 13 between the extraction well 11 and the pump 12, and can measure the real-time pressure in the first pipeline 13, so that the pressure of the monitoring pipeline is ensured to be in a negative pressure state. In this example, the vacuum gauge is HC-YS 100.
The primary sedimentation tank 2 is connected to a pump 12 via a second pipe 14, the pump 12 pumping the contaminated groundwater from the extraction well 1 via a first pipe 13 and pumping the contaminated groundwater into the primary sedimentation tank 2 via a second pipe 14. The polluted underground water is precipitated in the primary sedimentation tank, so that the solid pollutants are layered with the clear liquid, the solid pollutants are precipitated at the bottom of the primary sedimentation tank 2, and the clear liquid floats on the upper layer.
The gas-water separation device 3 is underground water stripping equipment. The water inlet of the gas-water separation device 3 is communicated with the primary sedimentation tank 2, and the clear liquid on the upper layer in the primary sedimentation tank 2 enters the gas-water separation device 3 in an overflow mode, wherein the clear liquid is the pretreated underground water. The gas-water separator 3 further includes an exhaust port 15 and a drain port 16, and the gas pollutants separated from the pretreated groundwater in the gas-water separator are discharged from the exhaust port 15, and the separated liquid is discharged from the drain port 16.
The air blower 8 is communicated with the air inlet of the air-water separation device 3, air can be provided for the air-water separation process, the contact area of air and air in underground water is increased, the diffusion speed of air in underground water is accelerated, and pollutants in the pretreated underground water are separated more thoroughly.
The gas phase treatment apparatus 4 includes a gas treatment unit 17 and a gas discharge unit 18. The gas treatment unit 17 is an activated carbon adsorption device. The gas treatment unit 17 is communicated with the exhaust port 15, and the gas pollutants exhausted from the exhaust port 15 are subjected to harmless treatment in the gas treatment unit 17. The gas discharge unit 18 is a chimney, is communicated with the gas treatment unit 17, and is provided with a gas outlet 19, and harmless gas obtained after treatment by the gas treatment unit 17 is discharged to the atmosphere through the gas outlet 19.
The gas outlet 19 is provided with a gas sampling detection device 9 which can detect the gas treated by the gas treatment unit 17, confirm that the gas reaches the emission standard and prevent secondary pollution. In this embodiment, the gas sampling detection device 9 is of the model sf 6.
The liquid phase treatment device 5 can add corresponding repairing agents for treatment according to the types of pollutants in the underground water, so that the separated liquid reaches the sewage nano-tube discharge standard. The liquid treatment device 5 is communicated with a liquid outlet 16, the liquid separated by the gas-water separation device 3 enters the liquid treatment device 5, and the repaired underground water is obtained after non-aqueous phase liquid pollutants in the liquid are removed. The liquid treatment apparatus 5 has a liquid outlet 20, and the restored groundwater is discharged through the liquid outlet 20. In this embodiment, the liquid outlet 20 is communicated with the groundwater piping network inlet 21, and the restored groundwater is discharged into the groundwater piping network through the groundwater piping network inlet 21.
The liquid outlet 20 is provided with a liquid sampling detection device 10 which can detect the liquid processed by the liquid phase processing device 5, confirm that the liquid reaches the discharge standard and prevent the occurrence of secondary pollution. In this embodiment, the liquid sampling and detecting device 10 is ZJSC-300.
The operation process of the contaminated groundwater remediation system in this embodiment is as follows:
first, the pump 12 pumps the contaminated groundwater in the extraction well 11 through the first pipe 13 and discharges it into the primary sedimentation tank 2 through the second pipe 14, the flow meter 6 is installed on the first pipe 13 and can measure the flow rate of the contaminated groundwater into the primary sedimentation tank in real time, and the vacuum meter 7 is installed on the first pipe 13 and can measure the pressure in the first pipe 13 in real time. After the polluted underground water is primarily precipitated in the primary sedimentation tank 2, the supernatant enters the gas-water separation device 3 for gas-water separation, the blower 8 continuously provides air for the gas-water separation device 3, the separated gas enters the gas treatment unit 17 through the exhaust port 15 for harmless treatment, the treated gas is discharged to the atmosphere through the gas outlet 19 of the gas discharge unit 18, and the gas sampling detection device 9 is arranged at the gas outlet 19 for detecting the treated gas; the remaining liquid enters the liquid phase treatment device 5 through the liquid outlet 16 for harmless treatment, and then is discharged through the liquid outlet 20, and is discharged into the groundwater pipe network through the groundwater pipe network inlet 21, and the liquid sampling detection device 10 is installed at the liquid outlet 20 for detecting the treated liquid.
Effects and effects of the embodiments
According to the polluted groundwater remediation system, the polluted groundwater can be extracted and discharged into the primary sedimentation tank by the extraction device, and is subjected to precipitation treatment in the primary sedimentation tank in advance, so that solid pollutants in the polluted groundwater can be removed, and subsequent remediation treatment is facilitated; the supernatant in the primary sedimentation tank enters a gas-water separation device in an overflow mode, gas pollutants in the underground water are separated under the action of the gas-water separation device, and the underground water after sedimentation treatment is treated by a gas phase treatment device; and treating the residual liquid pollutants and the polluted underground water through a liquid phase treatment device to obtain the repaired underground water. Therefore, the polluted underground water restoration system has a simple structure and lower restoration cost, and simultaneously restores multiphase pollutants in the polluted underground water more thoroughly to avoid secondary pollution.
In addition, the flow meter can measure the flow of the polluted underground water discharged into the primary sedimentation tank by the extraction device in real time so as to adjust the flow in time by matching with the overflow rate of the primary sedimentation tank and improve the remediation efficiency; the vacuum gauge can measure the pressure in the pipeline in real time, and the pressure of the pipeline is ensured to be monitored to be in a negative pressure state. The air blower can provide air for the gas-water separation device for a long time, so that pollutants in the underground water are separated more thoroughly.
In addition, the gas outlet is provided with a gas sampling detection device which can sample and detect the processed gas, and the liquid outlet is provided with a liquid sampling detection device which can sample and detect the processed liquid, so that secondary pollution to the environment caused by the discharged gas and liquid is avoided.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
In the invention, the flow meter is used for measuring the flow of the polluted underground water discharged into the primary sedimentation tank by the extraction device, and in practical application, the flow meter can be omitted or replaced by other flow measuring equipment.
The invention uses the vacuum gauge to measure the pressure of the pipeline between the extraction well and the pump, and in practical application, the vacuum gauge can be omitted or replaced by other pressure measuring equipment.
Claims (10)
1. A contaminated groundwater remediation system for remediating contaminated groundwater, comprising:
the extraction device is used for extracting the polluted underground water;
the primary sedimentation tank is used for pretreating the polluted underground water extracted by the extraction device to obtain pretreated underground water;
the gas-water separation device is communicated with the primary sedimentation tank and is provided with an air outlet and a liquid outlet, the gas-water separation device is used for carrying out gas-water separation treatment on the pretreated underground water, the separated gas is discharged from the air outlet, and the separated liquid is discharged from the liquid outlet;
a gas phase treatment device for treating the gas;
and the liquid phase treatment device is used for treating the liquid.
2. The contaminated groundwater remediation system of claim 1, further comprising:
the flow rate of the liquid flowing through the flow meter,
the flowmeter is arranged on a pipeline between the extraction device and the primary sedimentation tank and is used for measuring the flow of the polluted underground water discharged into the primary sedimentation tank by the extraction device.
3. The contaminated groundwater remediation system of claim 2, further comprising:
a vacuum meter is arranged on the upper portion of the vacuum tube,
the vacuum gauge is arranged on the pipeline between the extraction device and the primary sedimentation tank and used for measuring the pressure in the pipeline.
4. The contaminated groundwater remediation system of claim 3, further comprising:
a blower is arranged on the top of the shell,
the air blower is communicated with the gas-water separation device and used for increasing the contact area of gas and air in underground water and accelerating the diffusion speed of the gas in the underground water, so that the gas-liquid separation of the underground water is more thorough.
5. The contaminated groundwater remediation system of claim 4, wherein:
wherein the extraction device comprises an extraction well and a pump,
the extraction well is arranged underground, the pump is used for communicating the extraction well with the primary sedimentation tank, and the pump is used for pumping the polluted underground in the extraction well into the primary sedimentation tank.
6. The contaminated groundwater remediation system of claim 4, wherein:
wherein the gas phase treatment device comprises a gas treatment unit and a gas discharge unit,
the gas processing unit is communicated with the exhaust port and is used for processing the gas exhausted from the exhaust port to obtain processed gas;
the gas discharge unit is communicated with the gas processing unit and is provided with a gas outlet, and the processed gas is discharged to the atmosphere through the gas outlet.
7. The contaminated groundwater remediation system of claim 6, wherein:
and a gas sampling detection device is arranged at the gas outlet and is used for sampling and detecting the processed gas.
8. The contaminated groundwater remediation system of claim 4, wherein:
the liquid phase treatment device is communicated with the liquid outlet and is used for treating the liquid discharged from the liquid outlet to obtain treated liquid.
9. A contaminated groundwater remediation system according to claim 8, wherein:
wherein the liquid phase treatment device has a liquid outlet from which the treated liquid is discharged,
and a liquid sampling detection device is arranged at the liquid outlet and is used for sampling and detecting the processed liquid.
10. A contaminated groundwater remediation system according to claim 8, wherein:
wherein the liquid outlet is in communication with an underground water pipe network inlet for discharging treated liquid into the underground water pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110589733.3A CN113336347A (en) | 2021-05-28 | 2021-05-28 | Polluted groundwater remediation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110589733.3A CN113336347A (en) | 2021-05-28 | 2021-05-28 | Polluted groundwater remediation system |
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| CN113336347A true CN113336347A (en) | 2021-09-03 |
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| CN202110589733.3A Pending CN113336347A (en) | 2021-05-28 | 2021-05-28 | Polluted groundwater remediation system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090080979A1 (en) * | 2007-09-21 | 2009-03-26 | Fruits & Associates, Inc. | System and method for decontaminating soil and groundwater |
| CN204182671U (en) * | 2014-10-24 | 2015-03-04 | 武汉绿之地环保节能科技有限公司 | For the heterogeneous extracting prosthetic device of single pump hydrocone type that contaminated site is repaired |
| CN110482737A (en) * | 2019-08-02 | 2019-11-22 | 中科鼎实环境工程有限公司 | For the circulation well repair system of Organic Contamination of Groundwater object |
-
2021
- 2021-05-28 CN CN202110589733.3A patent/CN113336347A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090080979A1 (en) * | 2007-09-21 | 2009-03-26 | Fruits & Associates, Inc. | System and method for decontaminating soil and groundwater |
| CN204182671U (en) * | 2014-10-24 | 2015-03-04 | 武汉绿之地环保节能科技有限公司 | For the heterogeneous extracting prosthetic device of single pump hydrocone type that contaminated site is repaired |
| CN110482737A (en) * | 2019-08-02 | 2019-11-22 | 中科鼎实环境工程有限公司 | For the circulation well repair system of Organic Contamination of Groundwater object |
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