CN210497638U - Soil pollution repair system - Google Patents
Soil pollution repair system Download PDFInfo
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- CN210497638U CN210497638U CN201920615134.2U CN201920615134U CN210497638U CN 210497638 U CN210497638 U CN 210497638U CN 201920615134 U CN201920615134 U CN 201920615134U CN 210497638 U CN210497638 U CN 210497638U
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Abstract
The utility model discloses a soil pollution repair system, including the extraction electrode well and a plurality of injection electrode well that stretch into soil, extraction electrode well and injection electrode well are connected with multi-phase alternating current electric heating system and provide the circulation injection system of repairing agent, and extraction electrode well and injection electrode well adopt hollow graphite pipe, are equipped with a plurality of first through-holes on the wall of extraction electrode well, are equipped with a plurality of second through-holes on the wall of each injection electrode well. This soil pollution repair system, the second through-hole in each injection electrode well sets up with the first through-hole in the extraction electrode well relatively, thereby the guide promotes in repairing agent and the soil pollutant fully to contact, heterogeneous alternating current heating system is through leading-in underground with heterogeneous alternating current, induced current flow direction, realize that the circulation region is high-efficient more and heat transfer and evenly heat up, extraction electrode well and injection electrode well adopt hollow graphite pipe, full play extracts the effect of electrode well and injection electrode well, this utility model is used for the soil remediation field.
Description
Technical Field
The utility model relates to a soil remediation field especially relates to a soil pollution repair system.
Background
The persulfate activation technology is a new in-situ chemical oxidation technology, is widely applied to the remediation of various organic polluted sites and underground water, and has the advantages of safety, economy, high efficiency, insensitivity to pollutant types, easiness in combined use with other remediation technologies and the like in the application of land parcel remediation. Sodium persulfate is a commonly used oxidant in the persulfate activation technology, has the characteristics of high solubility, good stability at normal temperature and the like, and is activated to generate radicals with strong oxidizing property by heating, adding NaOH and other modes in the repair implementation of a polluted site, so that various organic pollutants can be oxidized and degraded. The biggest problem faced in oxidative degradation of various organic pollutants in soil is that the target pollutant is distributed in a non-aqueous phase, and the pollutant oxidation process needs to be carried out in an aqueous phase. In view of the characteristics of low water solubility, desorption, slow dissolution and the like of organic pollutants, the in-situ oxidation and repair effect of the pollutants is seriously restricted, and the key premise of realizing the high-efficiency oxidation of the pollutants is to strengthen the interface mass transfer of the pollutants. The heat activated persulfate technology which is emerging in recent years is an ideal method for solving the technical problem, and the key points of the technology are that the temperature rise can synergistically strengthen the mass transfer of the oxidant and the interfacial migration (desorption/dissolution) of the pollutant, the persulfate is activated to rapidly oxidize the water phase pollutant, the interfacial migration of the pollutant is maintained to be continuously and efficiently carried out, and a positive feedback cycle of the pollutant efficient mass transfer and oxidation is constructed.
Temperature control and optimization are key influence factors of the restoration effect of the thermally activated persulfate, and the traditional in-situ heating mode is difficult to meet the requirement of regulation and optimization of restoration temperature in a complex underground environment, so that the applicant submits a patent application with the application number of 201811516820.0, which discloses a soil in-situ restoration system and a restoration method thereof, and mainly relates to the principle description and partial structure of the restoration system and the restoration method, wherein the specific structure of the restoration system is to be perfected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a soil pollution repair system is provided, realize polluting regional high-efficient heat transfer and evenly rising temperature, promote the abundant contact of repairing agent and pollutant.
The technical scheme adopted for solving the technical problems is as follows:
the soil pollution repairing system comprises an extraction electrode well extending into soil and a plurality of injection electrode wells arranged around the extraction electrode well, wherein the extraction electrode well and the injection electrode wells are connected with a multi-phase alternating current electric heating system and a circulating injection system for providing a repairing agent, the extraction electrode well and the injection electrode wells adopt hollow graphite pipes, a plurality of first through holes are formed in the wall surface of the extraction electrode well, and a plurality of second through holes opposite to the first through holes are formed in the wall surface of each injection electrode well.
Preferably, the extraction electrode well is provided with a plurality of rows of first through holes, an included angle between two adjacent rows of first through holes is β, each injection electrode well is provided with a plurality of rows of second through holes, and an included angle between two adjacent rows of second through holes is theta.
Preferably, there are 3 injection electrode wells, 3 injection electrode wells are uniformly distributed around the extraction electrode well, the first through holes have 12 rows, the second through holes have 3 rows, β is equal to theta, and β and theta are 30-40 degrees.
Preferably, the extraction electrode well and the injection electrode well have an outer diameter of 35mm, an inner diameter of 20mm and a height of 200 mm.
Preferably, the extraction electrode well and the injection electrode well are provided with sealing joints at the upper part and sealing graphite sheets at the bottom part.
Preferably, the circulating injection system comprises an injection pump, an extraction pump and a liquid storage tank for storing the repairing agent, wherein a liquid inlet and a liquid outlet of the injection pump are respectively connected with the liquid storage tank and the injection electrode well, and a liquid inlet and a liquid outlet of the extraction pump are respectively connected with the extraction electrode well and the liquid storage tank.
Preferably, the multiphase alternating current electric heating system adopts three-phase alternating current, and comprises a transformer, wherein the transformer is connected with the injection electrode well and the extraction electrode well, and a control button for regulating voltage is arranged on the transformer.
Preferably, the voltage after the voltage reduction of the transformer is 15-35V.
Preferably, the temperature monitoring system comprises a multi-channel data acquisition unit and a plurality of temperature sensors arranged around the extraction electrode well and the injection electrode well, wherein the multi-channel data acquisition unit is electrically connected with the temperature sensors, and the temperature sensors are arranged in a layered mode in the vertical direction.
The utility model has the advantages that: the soil pollution remediation system injects the remediation agent through the injection electrode well and extracts the remediation agent from the extraction electrode well, the second through hole on each injection electrode well is arranged opposite to the first through hole on the extraction electrode well, thereby guiding the targeted circulation of the repairing agent, promoting the repairing agent to be fully contacted with pollutants in the soil, leading the multiphase alternating current into the ground by the multiphase alternating current heating system through the injection electrode well and the extraction electrode well, inducing the current to flow, utilizing conductive substances in the soil to transmit the current, providing heat energy, transmitting and dispersing the electric heat to a central area, therefore, more efficient heat transfer and uniform temperature rise of a circulating area are realized, the oxidation effect of the repairing agent is activated, the extraction electrode well and the injection electrode well adopt hollow graphite tubes, and the graphite has better electric conductivity and heat conductivity and is resistant to oxidation corrosion, so that the effects of the extraction electrode well and the injection electrode well are fully exerted.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a top view of an injection electrode well and an extraction electrode well according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an extraction electrode well according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an injection electrode well according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1-4, the utility model relates to a soil pollution repair system, including the extraction electrode well 10 that stretches into soil and a plurality of injection electrode well 20 of evenly distributed who encircles extraction electrode well 10 and set up, extraction electrode well 10 and injection electrode well 20 are connected with multiphase alternating current electric heating system 30 and provide the circulation injection system 40 of repairing agent, extraction electrode well 10 and injection electrode well 20 adopt hollow graphite pipe, be equipped with a plurality of first through-holes 11 on the wall of extraction electrode well 10, be equipped with a plurality of second through-holes 21 relative with first through-hole 11 on each injection electrode well 20's the wall.
This soil pollution repair system, inject the repairing agent through injection electrode well 20 and extract the repairing agent with extraction electrode well 10, second through-hole 21 on each injection electrode well 20 sets up with first through-hole 11 on the extraction electrode well 10 relatively, thereby guide the targeting circulation of repairing agent, promote the repairing agent and fully contact with of pollutant in the soil, heterogeneous alternating current heating system 30 leads into the ground with heterogeneous alternating current through injection electrode well 20 and extraction electrode well 10, the induced current flows to, utilize the conducting material transmission current in the soil, provide heat energy, transmit the electric heat and disperse to central zone, thereby realize that the circulation zone is heat transfer more high-efficient and the even intensification, the oxidation of activation repairing agent.
The extraction electrode well 10 and the injection electrode well 20 are hollow graphite pipes, the graphite has good conductivity, is higher than other most non-metal ores, but is poorer than metals such as copper, aluminum, iron and the like, and has good heat conductivity, stronger heat conductivity than most metals, oxidation corrosion resistance and good chemical stability, so that the effects of the extraction electrode well 10 and the injection electrode well 20 can be fully exerted.
In this example, persulfate is used as the repair agent.
Preferably, as shown in fig. 2 to 4, the extraction electrode well 10 is provided with a plurality of rows of first through holes 11, an included angle between two adjacent rows of first through holes 11 is β, each injection electrode well 20 is provided with a plurality of rows of second through holes 21, an included angle between two adjacent rows of second through holes 21 is θ, and each row of second through holes 21 corresponds to a corresponding first through hole 11, so that the transfer rate of the repairing agent is increased, and the degradation effect on pollutants is promoted.
Preferably, there are 3 injection electrode wells 20, 3 injection electrode wells 20 are uniformly distributed around the extraction electrode well 10, there are 12 rows of first through holes 11, there are 3 rows of second through holes 21, β is equal to theta, β and theta are 30-40 degrees, and β and theta are both too large or too small, which results in uneven distribution of the repairing agent, too large angle, scattered transfer distribution of the repairing agent, too small angle, and concentrated transfer distribution of the repairing agent.
The dimensions of the injection electrode well 20 and the extraction electrode well 10, β and the angle theta can be adjusted appropriately according to the actual needs.
Preferably, the extraction electrode well 10 and the injection electrode well 20 are provided with a sealing joint 12 at the upper part and a sealing graphite sheet or other sealing material at the bottom. The sealing joint 12 and the graphite sheet are used for sealing the injection electrode well 20 and the extraction electrode well 10, the circulating injection system 40 is connected through the sealing joint 12, and the integrity of the extraction electrode well 10 and the injection electrode well 20 can be ensured by adopting the graphite sheet to seal the bottom, so that the injection electrode well has better electrical conductivity, thermal conductivity and corrosion resistance.
Preferably, the circulation injection system 40 comprises an injection pump 41, an extraction pump 42 and a liquid storage tank 43 for storing the repairing agent, wherein a liquid inlet and a liquid outlet of the injection pump 41 are respectively connected with the liquid storage tank 43 and the injection electrode well 20, and a liquid inlet and a liquid outlet of the extraction pump 42 are respectively connected with the extraction electrode well 10 and the liquid storage tank 43. The injection pump 41 and the extraction pump 42 are made of chemical-resistant materials. The injection pump 41 and the extraction pump 42 can also adopt peristaltic pumps, the peristaltic pumps have high flow control precision, the injection flow can be accurately controlled, the utilization rate of the repairing agent is improved, the peristaltic pumps have good sealing performance, and the repairing agent can be prevented from being polluted and leaking.
Preferably, the multi-phase alternating current electric heating system 30 adopts three-phase alternating current, each phase voltage is 220V, the multi-phase alternating current electric heating system 30 comprises a transformer 31, the transformer 31 is connected with the injection electrode well 20 and the extraction electrode well 10, and a control button for regulating voltage is arranged on the transformer 31. After the transformer 31 reduces the three-phase alternating current, the injection electrode well and the extraction electrode well are connected by adopting a delta connection method or a star connection method, the three phases are respectively connected with the three injection electrode wells 20, the extraction electrode well 10 can be connected with a zero line, each phase voltage of the transformer 31 after reduction is not more than 220V, preferably 15-35V, so that the repairing agent can be safely and effectively heated and activated, the voltage can be adjusted by a control button, and the heating intensity and the efficiency can be adjusted.
Preferably, the system further comprises a temperature monitoring system, the temperature monitoring system comprises a multi-channel data collector 51 and a plurality of temperature sensors 52 arranged around the extraction electrode well 10 and the injection electrode well 20, the multi-channel data collector 51 is electrically connected with the temperature sensors 52, the temperature sensors 52 are arranged in a layered mode in the vertical direction to collect enough temperature data, and the multi-channel data collector 51 collects data of the temperature sensors 52.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and these equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (9)
1. A soil contamination remediation system characterized by: the device comprises an extraction electrode well extending into soil and a plurality of injection electrode wells arranged around the extraction electrode well, wherein the extraction electrode well and the injection electrode wells are connected with a multi-phase alternating current electric heating system and a circulating injection system for providing a repairing agent, the extraction electrode well and the injection electrode wells adopt hollow graphite pipes, a plurality of first through holes are formed in the wall surface of the extraction electrode well, and a plurality of second through holes opposite to the first through holes are formed in the wall surface of each injection electrode well.
2. The soil pollution remediation system of claim 1, wherein the extraction electrode wells are provided with a plurality of rows of first through holes, an included angle between two adjacent rows of first through holes is β, each injection electrode well is provided with a plurality of rows of second through holes, and an included angle between two adjacent rows of second through holes is θ.
3. The soil pollution remediation system of claim 2, wherein there are 3 injection electrode wells, 3 injection electrode wells are evenly distributed around the extraction electrode well, the first through holes have 12 rows, the second through holes have 3 rows, β and θ are equal, and the values of β and θ are 30-40 °.
4. The soil contamination remediation system of claim 3, wherein: the external diameter of the extraction electrode well and the injection electrode well is 35mm, the internal diameter is 20mm, and the height is 200 mm.
5. The soil contamination remediation system of claim 1, wherein: the upper parts of the extraction electrode well and the injection electrode well are provided with sealing joints and the bottom parts of the extraction electrode well and the injection electrode well are provided with sealing graphite sheets.
6. The soil contamination remediation system of claim 1, wherein: the circulating injection system comprises an injection pump, an extraction pump and a liquid storage tank for storing the repairing agent, wherein a liquid inlet and a liquid outlet of the injection pump are respectively connected with the liquid storage tank and the injection electrode well, and a liquid inlet and a liquid outlet of the extraction pump are respectively connected with the extraction electrode well and the liquid storage tank.
7. The soil contamination remediation system of claim 1, wherein: the multi-phase alternating current electric heating system adopts three-phase alternating current, the multi-phase alternating current electric heating system comprises a transformer, the transformer is connected with an injection electrode well and an extraction electrode well, and a control button for adjusting voltage is arranged on the transformer.
8. The soil contamination remediation system of claim 7, wherein: the voltage of the transformer after voltage reduction is 15-35V.
9. The soil pollution remediation system of any one of claims 1 to 8, wherein: the temperature monitoring system comprises a multi-channel data acquisition unit and a plurality of temperature sensors arranged around the extraction electrode well and the injection electrode well, the multi-channel data acquisition unit is electrically connected with the temperature sensors, and the temperature sensors are arranged in a layered mode in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920615134.2U CN210497638U (en) | 2019-04-29 | 2019-04-29 | Soil pollution repair system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920615134.2U CN210497638U (en) | 2019-04-29 | 2019-04-29 | Soil pollution repair system |
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| CN210497638U true CN210497638U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115990609A (en) * | 2022-12-29 | 2023-04-21 | 河北工业大学 | Soil in-situ remediation system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115990609A (en) * | 2022-12-29 | 2023-04-21 | 河北工业大学 | Soil in-situ remediation system and control method thereof |
| CN115990609B (en) * | 2022-12-29 | 2024-04-26 | 河北工业大学 | Soil in-situ remediation system and control method thereof |
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