CN211707713U - Multifunctional well - Google Patents
Multifunctional well Download PDFInfo
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- CN211707713U CN211707713U CN202020019587.1U CN202020019587U CN211707713U CN 211707713 U CN211707713 U CN 211707713U CN 202020019587 U CN202020019587 U CN 202020019587U CN 211707713 U CN211707713 U CN 211707713U
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Abstract
The utility model discloses a multifunctional well relates to underground environment and administers technical field, include: the well casing is characterized in that a sieve tube is arranged in the center of the inner part of the aquifer at the lower end of the well casing, quartz sand is filled between the outer side of the sieve tube and the well casing, a solid pipe is arranged in the well casing on the upper side of the sieve tube, and bentonite is filled between the outer side of the solid pipe and the well casing; the extraction device comprises a liquid phase extraction pipe and a gas phase extraction pipe which penetrate through one side of the upper end of the solid pipe, the lower end of the liquid phase extraction pipe is arranged inside the sieve pipe, the lower end of the liquid phase extraction pipe is connected with a submersible pump, the lower end of the gas phase extraction pipe is arranged inside the solid pipe, and the upper ends of the liquid phase extraction pipe and the gas phase extraction pipe are connected with a vacuum pump; the injection device comprises an injection pipe which penetrates through one side of the upper end of the solid pipe, and the outer end of the injection pipe is connected with a diaphragm pump; the underground environment restoration treatment can be carried out in one well by applying a multiphase extraction technology and an in-situ injection technology, the treatment effect is good, and the treatment cost is low.
Description
Technical Field
The utility model belongs to the technical field of the underground environment is administered, more specifically relates to a multifunctional well.
Background
For certain contaminated sites with complex contaminated components, it is difficult or economically unfeasible to achieve remediation goals within a predetermined period using a single remediation technique alone. The method is cooperated with two or more than two repairing methods to form a combined repairing technology, so that the limitation of a single repairing technology can be overcome, and the pollution repairing of a multi-pollutant composite pollution site is realized.
The multiphase extraction technology mainly realizes the extraction of free phase, polluted underground water and soil gas by applying vacuum to an extraction well, thereby achieving the purpose of removing pollutants. The multiphase extraction technology uses a vacuum pump to extract underground water and soil gas through a pipeline, and has a good treatment effect on volatile pollutants and NAPL fields.
The in-situ injection technology is a repairing technology which injects chemical oxidizing agents into an aquifer, oxidizes pollutants in soil or underground water by utilizing the oxidizing capability of the oxidizing agents or generated free radicals, and degrades the pollutants into intermediate products or final products (such as carbon dioxide and water) with lower toxicity or no toxicity, so as to achieve the aim of repairing. In addition to oxidizing and decomposing pollutants in underground water, the in-situ injection can also obviously increase the mass transfer speed between the soil in the saturation zone and the underground water, thereby accelerating the reduction of the total amount of the pollutants.
The organic pollution site is usually limited in treatment effect by using a single restoration method, long in restoration time, large in required well construction quantity and high in treatment cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multi-functional well to exist not enough among the prior art, can use heterogeneous extraction technique and normal position injection technique to carry out the underground environment restoration in a bite of well and administer, can with the convenient extraction gaseous phase pollutant in the soil and the liquid phase pollutant in the well, can pour into the oxidation medicament into again in soil and the moisture layer, treatment effect is good, and treatment cost is low.
In order to achieve the above object, the utility model provides a multifunctional well, include:
the well casing is characterized in that a sieve tube is arranged in the center of the inner part of the aquifer at the lower end of the well casing, quartz sand is filled between the outer side of the sieve tube and the well casing, a solid pipe is arranged in the well casing on the upper side of the sieve tube, and bentonite is filled between the outer side of the solid pipe and the well casing;
the extraction device comprises a liquid phase extraction pipe and a gas phase extraction pipe which penetrate through one side of the upper end of the solid pipe, the lower end of the liquid phase extraction pipe is arranged inside the sieve pipe, the lower end of the liquid phase extraction pipe is connected with a submersible pump, the lower end of the gas phase extraction pipe is arranged inside the solid pipe, and the upper ends of the liquid phase extraction pipe and the gas phase extraction pipe are connected with a vacuum pump;
the injection device comprises an injection pipe penetrating through one side of the upper end of the solid pipe, and the outer end of the injection pipe is connected with a diaphragm pump.
Optionally, a sleeve well cover is arranged at the upper end of the solid pipe.
Optionally, a cement seal is arranged between the upper end of the solid pipe and the ground.
Optionally, the cement seal thickness is not less than 10 cm.
Optionally, the solid pipe and screen pipe materials are both PVC pipes.
Optionally, the material of the sleeve well lid is CPVC.
Optionally, the screen openings are less than 1mm and the open screen is greater than seven percent.
Optionally, a first valve is disposed between the output end of the vacuum pump and the liquid phase extraction pipe and the gas phase extraction pipe.
Optionally, a second valve is arranged between the injection pipe and the output end of the diaphragm pump.
Optionally, the output end of the vacuum pump is connected with a gas-water mixing coil.
The utility model provides a multifunctional well, its beneficial effect lies in:
1. the utility model is suitable for various polluted soil and pollutant, has wide concentration range and obvious pollutant removal effect, and can reach more than 95 percent of removal rate for single or different concentration levels of organic pollutants;
2. the utility model combines the in-situ multiphase extraction technology with the in-situ injection technology, the in-situ multiphase extraction is carried out firstly, the pollutant concentration is reduced rapidly and greatly, the in-situ injection repair can be directly carried out after the multiphase extraction, the problems of secondary well digging and well reconstruction are solved, the time is saved, and the cost is reduced;
3. the utility model discloses use the heterogeneous extraction technique of normal position and normal position injection technique as the core, fully combine the technological principle of two kinds of technologies, each technology step reasonable in design, easy operation, the feasibility is strong, easily popularizes and implements.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural view of a multi-purpose well according to an embodiment of the present invention.
Description of reference numerals:
1. a well pipe; 2. a screen pipe; 3. quartz sand; 4. solid tubes; 5. bentonite; 6. an extraction device; 7. a liquid phase extraction tube; 8. a gas phase extraction tube; 9. a submersible pump; 10. a vacuum pump; 11. an injection device; 12. an injection pipe; 13. a diaphragm pump; 14. a casing well cover; 15. sealing a cement layer; 16. a first valve; 17. a second valve; 18. a gas-water mixing coil pipe.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a multifunctional well, include:
the well casing is characterized in that a sieve tube is arranged in the center of the inner part of the aquifer at the lower end of the well casing, quartz sand is filled between the outer side of the sieve tube and the well casing, a solid pipe is arranged in the well casing on the upper side of the sieve tube, and bentonite is filled between the outer side of the solid pipe and the well casing;
the extraction device comprises a liquid phase extraction pipe and a gas phase extraction pipe which penetrate through one side of the upper end of the solid pipe, the lower end of the liquid phase extraction pipe is arranged inside the sieve pipe, the lower end of the liquid phase extraction pipe is connected with a submersible pump, the lower end of the gas phase extraction pipe is arranged inside the solid pipe, and the upper ends of the liquid phase extraction pipe and the gas phase extraction pipe are connected with a vacuum pump;
the injection device comprises an injection pipe penetrating through one side of the upper end of the solid pipe, and the outer end of the injection pipe is connected with a diaphragm pump.
Specifically, the sieve tube wall is provided with openings, underground water in the water-containing layer is filtered by quartz sand and enters the well through the openings on the sieve tube wall, the extraction device extracts liquid phase and gas phase pollutants in the well through the liquid phase extraction tube and the gas phase extraction tube, the liquid phase substances in the well can be extracted through the submersible pump, the liquid phase substances are extracted out of the well under the action of the vacuum pump, the vacuum pump simultaneously extracts soil gas in the well, the gas and the liquid phase substances are mixed and then discharged, and the sieve tube has a good treatment effect on volatile pollutants and NAPL fields; after no obvious free phase exists in the underground water and the concentration of the pollutants is not obviously reduced any more, the injection device injects the oxidizing agent into the well, the diaphragm pump can inject the oxidizing agent into the well through the injection pipe, and the oxidizing agent or the oxidizing capability of the generated free radicals is utilized to oxidize the pollutants in the soil and the underground water and degrade the pollutants into intermediate products or final products with lower toxicity or no toxicity, so that the aim of repairing is fulfilled.
In one example, the upper end of the solid pipe is provided with a sleeve well cover.
Specifically, the arrangement of the sleeve well cover can prevent foreign matters from entering the well to cause secondary pollution, and a closed space can be formed in the well, so that the oxidizing agent can exert an effect.
In one example, a cement seal is arranged between the upper end of the solid pipe and the ground.
In one example, the cement seal thickness is no less than 10 cm.
In one example, the solid pipe and screen material are both PVC pipe.
In other examples, the material of the solid pipe and the screen pipe can also be a ceramic pipe or a glass fiber reinforced plastic pipe.
In one example, the material of the sleeved well lid is CPVC.
In one example, the screen openings are less than 1mm and the openings are greater than seven percent.
Specifically, the size of the opening of the sieve tube is set to be smaller than 1mm, so that the water inflow of the sieve tube can be ensured, and the problem that particles enter the sieve tube to cause blockage or damage of the submersible pump can be avoided.
In one example, a first valve is disposed between the output of the vacuum pump and the liquid and gas phase extraction lines.
In one example, a second valve is provided between the fill tube and the output end of the diaphragm pump.
Specifically, the first valve and the second valve can respectively control the extraction and injection of the extraction device and the injection device, during work, the multiphase extraction technology is firstly used for extracting underground multiphase pollutants, and then the in-situ injection technology is used for injecting chemical oxidation agents into the well, so that the underground environment restoration purpose is achieved.
In one example, the output end of the vacuum pump is connected with a gas-water mixing coil pipe.
Specifically, the liquid phase substance and the gas phase substance extracted by the extraction device are discharged to a specified position through the gas-water mixing coil pipe under the action of the vacuum pump.
Examples
As shown in fig. 1, the utility model provides a multifunctional well, include:
the well casing comprises a well casing 1, wherein a sieve tube 2 is arranged at the center inside an aquifer at the lower end of the well casing 1, quartz sand 3 is filled between the outer side of the sieve tube 2 and the well casing 1, a solid pipe 4 is arranged in the well casing 1 on the upper side of the sieve tube 2, and bentonite 5 is filled between the outer side of the solid pipe 4 and the well casing 1;
the extraction device 6 comprises a liquid phase extraction pipe 7 and a gas phase extraction pipe 8 which penetrate through one side of the upper end of the solid pipe 4, the lower end of the liquid phase extraction pipe 7 is arranged inside the sieve pipe 2, the lower end of the liquid phase extraction pipe 7 is connected with a submersible pump 9, the lower end of the gas phase extraction pipe 8 is arranged inside the solid pipe 4, and the upper ends of the liquid phase extraction pipe 7 and the gas phase extraction pipe 8 are connected with a vacuum pump 10;
the injection device 11 comprises an injection pipe 12 penetrating the upper end side of the solid pipe 4, and the outer end of the injection pipe 12 is connected with a diaphragm pump 13.
In this embodiment, the upper end of the solid pipe 4 is provided with a sleeve well cover 14.
In this embodiment, a cement seal 15 is provided between the upper end of the solid pipe 4 and the ground.
In this embodiment, the cement seal 15 has a thickness of not less than 10 cm.
In this embodiment, the solid pipe 4 and the screen pipe 2 are made of PVC pipes.
In this embodiment, the material of the sleeve manhole cover 14 is CPVC.
In this embodiment, the screen 2 has openings of less than 1mm and openings of greater than seven percent.
In this embodiment, a first valve 16 is disposed between the output end of the vacuum pump 10 and the liquid phase extraction pipe 7 and the gas phase extraction pipe 8.
In this embodiment, a second valve 17 is provided between the filling pipe 12 and the output end of the diaphragm pump 13.
In this embodiment, the output end of the vacuum pump 10 is connected with a gas-water mixing coil 18.
Taking the underground environment treatment in a certain site in Suzhou city of Jiangsu province as an example, pollutants in soil and underground water in the site are petroleum hydrocarbon, the pollution depth is 10.5m, the soil is viscous soil, and the pollution area is 1038 square meters. This place is used heterogeneous extraction of normal position and is combined the normal position to pour into chemical oxidation restoration technique into and restore and administer, and the restoration process adopts the utility model provides a multi-functional well, multi-functional well set up the degree of depth and be 11m, build 150 mouths of well in this place altogether. When the device is used, the first valve 16 is opened, the submersible pump 9 in the sieve tube 2 and the vacuum pump 10 on the ground are started, the submersible pump 9 pumps liquid substances on the lower side in the well into the liquid phase extraction pipe 7, and the liquid phase substances are extracted outwards from the well in cooperation with the use of the vacuum pump 10; meanwhile, the gas phase extraction pipe 8 provided in the solid pipe 2 extracts the soil gas in the well to the outside by the extraction action of the vacuum pump 10, and discharges the soil gas to a specified recovery position through the gas-water mixing coil 18. Stopping the extraction operation of the extraction device 6 and closing the first valve 16 after no obvious free phase exists in the groundwater and the concentration of the pollutant is not obviously reduced any more; and opening the second valve 17, starting the diaphragm pump 13, injecting an oxidizing agent into the well through the injection pipe 12, oxidizing the pollutants in the soil and the underground water by utilizing the oxidizing capability of the oxidizing agent or the generated free radicals, and degrading the pollutants into an intermediate product or a final product with lower toxicity or no toxicity, thereby achieving the aim of repairing.
In the embodiment, after the soil in the field is repaired for 3 months, the content of pollutants in the soil reaches the standard, the multifunctional well is not damaged at all in the process, and the recovery rates of the submersible pump 9, the diaphragm pump 13, the vacuum pump 10 and the like reach 98%.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A multi-purpose well, comprising:
the well casing is characterized in that a sieve tube is arranged in the center of the inner part of the aquifer at the lower end of the well casing, quartz sand is filled between the outer side of the sieve tube and the well casing, a solid pipe is arranged in the well casing on the upper side of the sieve tube, and bentonite is filled between the outer side of the solid pipe and the well casing;
the extraction device comprises a liquid phase extraction pipe and a gas phase extraction pipe which penetrate through one side of the upper end of the solid pipe, the lower end of the liquid phase extraction pipe is arranged inside the sieve pipe, the lower end of the liquid phase extraction pipe is connected with a submersible pump, the lower end of the gas phase extraction pipe is arranged inside the solid pipe, and the upper ends of the liquid phase extraction pipe and the gas phase extraction pipe are connected with a vacuum pump;
the injection device comprises an injection pipe penetrating through one side of the upper end of the solid pipe, and the outer end of the injection pipe is connected with a diaphragm pump.
2. The multifunctional well as claimed in claim 1, wherein a well cover is provided on the upper end of the solid pipe.
3. The multifunctional well according to claim 1, wherein a cement seal is provided between the upper end of the solid pipe and the ground.
4. A multifunctional well as claimed in claim 3, wherein said cement seal thickness is not less than 10 cm.
5. The multifunctional well according to claim 1, wherein said solid and screen materials are PVC pipes.
6. The multifunctional well according to claim 2, wherein the material of said well cover is CPVC.
7. A multi-purpose well according to claim 1, wherein said screen openings are less than 1mm and the screen openings are greater than seven percent.
8. A multi-purpose well according to claim 1, wherein a first valve is provided between the output of the vacuum pump and the liquid and gas phase extraction lines.
9. A multifunctional well according to claim 1, characterized in that a second valve is arranged between the injection pipe and the output end of the diaphragm pump.
10. The multifunctional well according to claim 1, wherein the output end of the vacuum pump is connected with a gas-water mixing coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020019587.1U CN211707713U (en) | 2020-01-06 | 2020-01-06 | Multifunctional well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020019587.1U CN211707713U (en) | 2020-01-06 | 2020-01-06 | Multifunctional well |
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| CN211707713U true CN211707713U (en) | 2020-10-20 |
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| CN202020019587.1U Active CN211707713U (en) | 2020-01-06 | 2020-01-06 | Multifunctional well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916598A (en) * | 2021-02-26 | 2021-06-08 | 煜环环境科技有限公司 | Organic contaminated soil vapor extraction equipment |
| CN113044918A (en) * | 2021-03-04 | 2021-06-29 | 北京高能时代环境技术股份有限公司 | A equip for collecting NAPLs in groundwater |
| CN114577532A (en) * | 2022-01-18 | 2022-06-03 | 江苏众川生态环境有限公司 | Multi-functional well repairing system for multiphase extraction, monitoring and sampling |
| CN116696299A (en) * | 2023-04-18 | 2023-09-05 | 生态环境部土壤与农业农村生态环境监管技术中心 | Anti-blocking method and device for injecting powdery repairing agent into pore aquifer |
-
2020
- 2020-01-06 CN CN202020019587.1U patent/CN211707713U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916598A (en) * | 2021-02-26 | 2021-06-08 | 煜环环境科技有限公司 | Organic contaminated soil vapor extraction equipment |
| CN113044918A (en) * | 2021-03-04 | 2021-06-29 | 北京高能时代环境技术股份有限公司 | A equip for collecting NAPLs in groundwater |
| CN114577532A (en) * | 2022-01-18 | 2022-06-03 | 江苏众川生态环境有限公司 | Multi-functional well repairing system for multiphase extraction, monitoring and sampling |
| CN114577532B (en) * | 2022-01-18 | 2024-03-26 | 江苏众川生态环境有限公司 | Multiphase extraction monitoring sampling multifunctional well repairing system |
| CN116696299A (en) * | 2023-04-18 | 2023-09-05 | 生态环境部土壤与农业农村生态环境监管技术中心 | Anti-blocking method and device for injecting powdery repairing agent into pore aquifer |
| CN116696299B (en) * | 2023-04-18 | 2024-01-02 | 生态环境部土壤与农业农村生态环境监管技术中心 | Anti-blocking method and device for injecting powdery repairing agent into pore aquifer |
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