CN210586351U - Electric method on-line monitoring system for monitoring in-situ injection soil and underground water remediation process - Google Patents
Electric method on-line monitoring system for monitoring in-situ injection soil and underground water remediation process Download PDFInfo
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Abstract
The utility model discloses an electric method on-line monitoring system of control normal position injection restoration soil and groundwater process. The system comprises data acquisition hardware, data processing hardware, a cloud platform and a solar panel; the data acquisition hardware comprises an electrical method instrument, a cable conductor, a cable head, an electrode, a multi-way electrode converter and a jumper box; the data processing hardware includes a remote host; a cable and a plurality of electrodes are distributed in the underground monitoring well; the electrodes are arranged at a certain interval and are connected with the cable through a multi-way electrode converter; the cable wires are connected in series through cable heads and connected to the electrical method instrument; the electrical method instrument is connected with the remote host through the cloud platform; the solar panel is connected with the electrical method instrument. The system solves two problems of power supply and data transmission, and realizes the long-term unmanned monitoring target of electrical monitoring; the method can reflect the pollution remediation conditions of soil and underground water in real time aiming at the diffusion and dynamic distribution change of remediation agents in the aquifer, and accurately ascertain the position and diffusion range of a pollution source.
Description
Technical Field
The utility model belongs to the technical field of soil and groundwater restoration, a control normal position is poured into and is restoreed electric method on-line monitoring system of soil and groundwater process is related to.
Background
Soil and underground water are the material foundation on which human beings live, and the exposure of a plurality of pollution events in recent years shows that the pollution problem of soil and underground water in China is increasingly prominent and seriously threatens the health of people, so that the remediation and treatment of the soil and the underground water in the polluted site are not slow. The economic development of China is in the transformation stage, the original development mode taking resources and environment as costs is gradually replaced by a novel green and healthy economic mode, and the investigation and repair work on polluted soil and underground water is an important work of the nation in recent years.
The in-situ chemical oxidation/reduction repairing technology is to inject oxidant or reductant into the polluted soil or underground water area of chlorohydrocarbon and to convert the pollutant in the polluted soil or underground water into non-toxic matter or matter with relatively low toxicity through oxidation or reduction. In the repairing process, the influence range and the underground moving path of pollutant concentration, intermediate products, medicaments and the like have important influence on the repairing effect.
The traditional method for fixed-point monitoring by taking water samples has many limitations, including information single-point and depth information uncertainty caused by sampling. The resistivity distribution of the underground is imaged by a cross-hole high-density resistivity method (a geophysical method), so that the flow path of the medicament can be inferred by continuously monitoring the medicament perfusion period and the medicament reaction period and comparing the change of the resistivity before and after the medicament perfusion period and the medicament reaction period. At present, no electric method on-line monitoring system capable of monitoring the in-situ injection soil and underground water remediation process exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a control normal position and pour into the electric method on-line monitoring system who restores soil and groundwater process into. The system can continuously monitor the medicament perfusion period and the medicament reaction period by carrying out on-line monitoring and imaging on the underground resistivity distribution state, and deduces the flow path of the medicament by comparing the change of the resistivity before and after the medicament perfusion period and the medicament reaction period, thereby solving the problems of depth information uncertainty and the like caused by single-point information and sampling of the traditional water sampling monitoring.
The utility model aims at realizing through the following technical scheme:
an electric method on-line monitoring system for monitoring the in-situ injection and remediation process of soil and underground water comprises an underground monitoring well, data acquisition hardware, data processing hardware and a cloud platform; the data acquisition hardware comprises a data acquisition instrument (an electrical method instrument), a cable head, an electrode, a multi-way electrode converter (a channel box) and a jumper box; the data processing hardware comprises a remote host (namely a computer, and data inversion software is installed in the computer); a plurality of underground monitoring wells are arranged in the polluted area, and cables and a plurality of electrodes are distributed in the underground monitoring wells; the electrodes comprise a power supply electrode (namely a grounding electrode connected with a power supply) and a plurality of measuring electrodes; in an underground monitoring well, a plurality of electrodes are arranged at certain intervals, each electrode is connected with a thin cable, and a plurality of thin cables are bound together to form a thick cable (a multi-core cable) which is a cable with a certain sequence and rule; each electrode in the well is connected with a multi-way electrode converter (channel box) arranged on the ground through a thin cable, and the switch of each electrode is controlled by the multi-way electrode converter; on the ground, each multi-way electrode converter (channel box) is connected with two cables; the cable wires connected with the multi-channel electrode converter (channel box) are connected in series through cable heads and are connected to a data acquisition instrument, namely an electrical method instrument, through a jumper box; the electrical method instrument is connected with a remote host (computer) through a cloud platform.
Further, the system also comprises a solar panel, and the solar panel is connected with the electrical method instrument sequentially through the solar intelligent charging controller and the solar storage battery.
Further, the data acquisition instrument (electrical method instrument) is a GD series electrical method instrument produced by Shenzhen Misheng ground vein technology Limited.
Furthermore, the cables of the GD series electrical method instrument, which are arranged on the ground in the whole pollution area, are accessed and exchanged in a bidirectional way; that is: the front end and the rear end of the cable are both connected with the cable head; the cable head is internally provided with a switching device.
Furthermore, the cables of the GD series electrical method instrument, which are arranged on the ground in the whole pollution area, adopt a sectional centralized wiring mode; the precise switching devices are arranged in the cable head in a segmented and centralized mode, and each high-density cable is managed by the cable head in a segmented mode.
Furthermore, the GD series electrical method instrument is a multi-channel device, is provided with 12 independent receiving channels, and supports single-side 5-channel and double-side 10-channel synchronous measurement.
Furthermore, the GD series electrical method instrument supports electrodes with equal spacing, and a small-spacing cable can complete large-electrode spacing test; at the rock or gully position in the underground monitoring well, a tap at the position on the cable is empty, and no electrode is arranged.
Furthermore, the GD series electrical method instrument has a resistivity automatic iteration function, namely, a user does not need to pay attention to the measurement period and the iteration times, and the system automatically adjusts the emission period and the iteration times according to the acquired data in the measurement process to achieve balance of test time and data quality; therefore, the long-term unmanned monitoring target of electrical monitoring can be realized.
Furthermore, the electric-method on-line monitoring system is characterized in that a plurality of underground monitoring wells are arranged in a pollution area, the coverage area of each underground monitoring well is 10-12 square meters, each hole is provided with 40-55 electrodes, the electrode spacing is 0.5-0.8m, and data acquisition is carried out according to a certain logic rule.
Furthermore, the electric-method on-line monitoring system is characterized in that 4 underground monitoring wells are arranged in a pollution area, each underground monitoring well is internally provided with a power supply electrode and 40 measuring electrodes, the distance between every two electrodes is 0.5m, and data acquisition is carried out according to a certain logic rule.
The method for monitoring the in-situ injection and remediation process of soil and underground water by adopting the electric-method online monitoring system comprises the following steps: preparing a plurality of corresponding underground electrodes in an underground monitoring well of a polluted area, arranging the electrodes at certain intervals, and connecting the electrodes into cables with a certain sequence and rule through a multi-way electrode converter (channel box); the cable head is used for connecting the cable in series and connecting the cable to a measuring host (electrical method instrument), so that a data acquisition command sent by the remote host can be realized through the measuring host (electrical method instrument); then the electrode is put into an underground monitoring well, a power supply is switched on, discharging and data acquisition (data acquisition according to a certain logic rule) are carried out in the underground monitoring well, and data processing is carried out through data inversion software; then, the sodium persulfate solution is injected into the polluted chlorohydrocarbon soil and underground water, and the resistivity change of the soil is observed respectively at the early stage, the middle stage and the later stage of the medicament injection, so as to judge whether the pollution moves and whether the medicament reaches the expected range. And taking the value in the early stage of the observation process as a background value, and comparing the difference of the data before and after the observation process.
The data inversion software used by the method is Earth Imager 2D Version2.4.2, is developed by AGI company in America, is mainly used for resistivity inversion processing, and also has the functions of inversion processing and forward processing of excited data. When the software is used for inversion processing, the terrain correction of the surface electrode can be added. The data inversion method used is a round-robin inversion. The data processing steps are as follows: importing data, checking data reliability, removing negative values, setting parameters, inversion processing, convergence checking and adjusting experience details.
The utility model has the advantages that:
the utility model discloses an electric method on-line monitoring system has solved two big difficult problems of power supply and data transmission, has realized the long-term unmanned monitoring target of electric method monitoring; the method specifically comprises the following steps: the solar panel is connected with the electrical method instrument (in the prior art, the electrical method instrument is powered by a dry battery through direct current), so that the problem of power supply is solved; the electrical method instrument is connected with the remote host through the cloud platform (in the prior art, the electrical method instrument is directly connected with the host), so that the problem of data transmission is solved; by adopting the GD series electrical method instrument with the resistivity automatic iteration function, the long-term unmanned monitoring target of electrical method monitoring is realized.
The utility model discloses an electric method on-line monitoring system adopts electric method on-line monitoring method (cross-hole high density resistivity method) to carry out on-line monitoring and formation of image through the resistivity distribution situation to the underground, can carry out continuous monitoring during medicament fills and medicament reaction, and the change of resistivity around the contrast infers the flow path of medicament, has solved the information single-point of traditional water sampling monitoring and has sampled the degree of depth information uncertainty scheduling problem that leads to.
The utility model discloses an in situ injection repair process monitoring technology based on geophysical exploration technique has been developed. The electric method on-line monitoring system and the electric method on-line monitoring method have timeliness and continuity, can reflect the pollution remediation condition of soil and underground water in real time aiming at the diffusion and dynamic distribution change of remediation agents in an aquifer, accurately ascertain the position and diffusion range of a pollution source, and gradually carry out digital assessment of remediation effect.
The utility model discloses an electric method on-line monitoring system and monitoring method compare with prior art, have following advantage:
(1) the current line flow direction in the form of a cross-hole is 360 degrees, and since the electrode can be placed at the target depth, the current line can also have dense current at a deeper position, and the cross-hole method can provide better resolution in depth.
(2) Identifying a main transmission path of the medicament in a stratum space in the injection process and a detailed distribution condition of the medicament in the stratum after injection is finished through statistics and analysis of soil conductivity data; whether the injected medicament can be uniformly diffused in a polluted target area or not is evaluated, and meanwhile, the injected medicament is in contact with the pollutant or generates a mixing effect, the injection process is timely adjusted according to the result aiming at the area with poor transmission, a monitoring system in the in-situ injection repairing process is established, and a basis is provided for timely adjusting the injection position and the injection dosage of the subsequent medicament.
Drawings
Fig. 1 is a plan view of a contaminated area monitoring well arrangement of the present invention;
FIG. 2 is a schematic diagram of the present invention in which downhole electrodes are connected by a multi-way electrode converter (channel box) to form cables in a certain order and regularity;
FIG. 3 is a schematic diagram of the data acquisition hardware portion of the present invention on the ground;
fig. 4 is a working schematic diagram of the electric-method online monitoring system of the present invention;
FIG. 5 is a graph showing the monitoring results of the DW4-DW2 cross-section during the drug filling period in accordance with the present invention;
FIG. 6 is a graph of the monitoring results of the DW1-DW3 cross-section during the drug fill period in the present invention;
fig. 7 is a schematic diagram of an electrode discharge field in a hole according to the present invention.
In the figure: 1. an electrode; 2. a cable wire; 3. the solar energy power supply system comprises a cable head 4, a jumper wire box 5, a multi-way electrode converter (channel box) 6, a solar panel 7, a solar storage battery A and a power supply electrode; B. a power supply electrode; m, a measuring electrode; n, measuring electrodes; G. a 16m drenching well; H. 8m of medicine filling well; DW1, DW2, DW3 and DW4 are all electrode monitoring wells; C. d, E, F are all elevated in conductivity.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, the utility model relates to an electric method on-line monitoring system for monitoring in-situ injection and remediation process of soil and underground water, which comprises a plurality of underground monitoring wells arranged in a pollution area, data acquisition hardware, data processing hardware and data inversion software, and also comprises a cloud platform and a solar panel; the data acquisition hardware comprises a data acquisition instrument (an electrical method instrument) and a cable 2, a cable head 3, an electrode 1, a multi-way electrode converter (a channel box) 5 and a jumper box 4 which are matched; the data processing hardware comprises a remote host (computer); data inversion software is installed in the remote host; a plurality of underground monitoring wells are arranged in the polluted area, and a thick cable (multi-core cable) and a plurality of electrodes are distributed in each underground monitoring well; the electrodes comprise a power supply electrode (namely a grounding electrode connected with a power supply) and a plurality of measuring electrodes; as shown in fig. 2, in the underground monitoring well, a plurality of electrodes are arranged at certain intervals, each electrode is connected with a thin cable, and a plurality of thin cables are bound together to form a thick cable (a multi-core cable) which is a cable with a certain sequence and regularity; as shown in fig. 3, a plurality of thin cable lines respectively connected to each electrode in the well are connected to a multiplex electrode converter 5 (channel box) provided on the ground, and the switching of each electrode is controlled by the multiplex electrode converter; on the ground, as shown in fig. 3, each multiplex electrode converter (channel box) is connected to two cables (thick); the cable wires connected with the multi-channel electrode converter (channel box) are connected in series through cable heads and are connected to a data acquisition instrument, namely an electrical method instrument, through a jumper box; as shown in fig. 4, the electrical method instrument is connected to a remote host (computer) through a cloud platform.
The electric method instrument is connected with a BP-145 rechargeable direct current power supply. Usually, the data acquisition instrument (electrical method instrument) in the system is mainly powered by a BP-145 rechargeable direct current power supply. In addition, for the convenience of portable power supply in the field, still be connected with solar panel 6 on the electrical method appearance, this solar panel 6 loops through solar energy intelligent charging controller, solar battery 7 and is connected with the electrical method appearance. The solar storage battery and the solar panel are only one way for supplying power without an external power supply in the system.
As shown in fig. 1, the electrical online monitoring system is provided with 4 underground monitoring wells (electrode monitoring wells) in a polluted area (a test plot between a temporary office room and a green area), each hole (each underground monitoring well) is provided with 40 measuring electrodes, the distance between the electrodes is 0.5m, and data is acquired according to a certain logic rule. The test plots were set with the monitor well locations as shown in fig. 1. The DW1, DW2, DW3 and DW4 are electrode monitoring wells, the actual measuring distance between the DW1 and the DW3 after drilling is 4.5m, and the actual measuring distance between the DW2 and the DW4 is 8.5 m.
As shown in fig. 2, each of the underground monitoring wells (per hole) DW1, DW2, DW3 and DW4 has 40 measuring electrodes and one power supply electrode, and the electrode spacing is 0.5 m. The first electrode near the surface of the earth is approximately 1m below ground. As shown in FIG. 2, there are one supply electrode A and 40 measurement electrodes M in borehole 1(DW1 or DW2) and one supply electrode B and 40 measurement electrodes N in borehole 2(DW3 or DW 4). As shown in fig. 3, 20 thin cables were connected to each multiplex electrode converter (channel box), and these 20 thin cables were connected to 20 measurement electrodes in the well, respectively; in an underground monitoring well, 40 thin cables are bound together inside a thick cable, and every 20 thin cables are connected with a multi-way electrode converter (channel box). That is, one underground monitoring well is correspondingly provided with two multiplex electrode converters (channel boxes) and 40 measuring electrodes.
In the electric method on-line monitoring system, the used data acquisition instrument (electric method instrument) is a GD series electric method instrument which is self-developed and produced by Shenzhen ShangGeji technology Limited company, namely a GD-20 multichannel direct current electric method instrument system (high-density electric method instrument system).
The GD series electrical method instrument is characterized in that cables arranged on the ground in the whole polluted area are connected and exchanged in a bidirectional mode; namely: the front end and the rear end of the cable are both connected with the cable head; the cable head is internally provided with a switching device. That is, a certain tap is managed by the front-end cable head, and meanwhile, a tap second contact (double-tap cable) or an adjacent tap (single-tap cable) is connected with the rear-end cable head by the rear-section wire core, so that bidirectional connection and management are realized.
The GD series electrical method instrument adopts a sectional centralized wiring mode for the cable wires which are arranged on the ground in the whole pollution area. In the high-density test, the high-density exchange device and the multi-tap cable have the greatest influence on the construction efficiency and the cost; the GD series electrical method instrument adopts a unique sectional centralized solution scheme to centralize precise switching devices in a cable head in a sectional mode, and each high-density cable is managed by the cable head in a sectional mode. 12-24 taps are taken as a section, centralized exchange control is carried out through cable heads at two ends, and a distributed control mode is adopted between each cable head and a host. The distributed cable testing device has the advantages of simple distributed wiring and suitability for long section testing, and also has the advantages of simplicity, reliability and low cost of a centralized cable.
The GD series electrical method instrument is a multi-channel device, is provided with 12 independent receiving channels, and supports single-side 5-channel and double-side 10-channel synchronous measurement. For a single-channel device, script simultaneous measurement of two devices is supported, efficiency is improved, and meanwhile, the consistency of measured data environments is guaranteed.
The GD series electrical method instrument has the resistivity automatic iteration function: namely, a user does not need to pay attention to the measurement period and the iteration times, and the system automatically adjusts the emission period and the iteration times according to the acquired data in the measurement process, so that the balance between the test time and the data quality is achieved. Therefore, the long-term unmanned monitoring target of electrical monitoring can be realized.
The GD series electrical method instrument supports electrodes with equal spacing, and the small-spacing cable can complete the large electrode spacing test. When the situation that the electrodes cannot be installed really due to the fact that rocks or ravines are encountered in the field, the tap at the position on the cable can be vacant, and the test of the whole section is not influenced.
The cross-hole high-density resistivity method has the working mode that: a certain number of electrodes are placed in the two boreholes and connected to the ground through a multi-core cable, and the two electrodes form an inter-borehole electrode array, as shown in fig. 2.
The physical premise of the cross-hole high-density resistivity method is the conductivity difference between underground media, current I is supplied to the underground through an A, B power supply electrode, and then potential difference delta V is measured between M, N measuring electrodes, so that the apparent resistivity value rho of the point (between M, N) is obtained as K delta V/I; and then, according to the actually measured apparent resistivity profile, calculation and analysis are carried out, so that the resistivity distribution condition in the underground stratum can be obtained, the stratum can be divided, and abnormity and the like can be judged.
During data acquisition, the electrodes are divided into odd and even groups, A, B power supply electrodes are fully combined in odd-even pairing mode, after each combination, the rest electrodes are used as measuring electrodes to be combined into a plurality of M, N measuring electrodes at will, and meanwhile, the voltage and current values among the measuring electrodes M, N are measured; and then, carrying out data processing by using resistivity inversion software to finally obtain an inter-hole resistivity distribution diagram, and judging whether the pollution moves and whether the medicament reaches an expected range according to the change of the soil resistivity.
As shown in fig. 3, in the electrical method on-line monitoring system, the data acquisition hardware mainly comprises three parts, namely a measurement host (electrical method instrument), a multi-way electrode converter (channel box) and an electrode system (including a plurality of electrodes); the electrode system is arranged in an underground monitoring well, and the measuring host (an electrical method instrument) and the multi-way electrode converter (a channel box) are arranged on the ground; a plurality of electrodes of the electrode system are connected with a multi-way electrode converter (channel box) through cables, and the switch of each electrode is controlled by the multi-way electrode converter (channel box); the cables connected to the multi-way electrode converter (channel box) are connected in series through cable heads and connected to the electrical method instrument through a jumper box. The multi-channel electrode converter (channel box) controls the power supply and measurement state of each electrode of the electrode system through a cable wire; the measuring host (electrical method instrument) sends working instructions to the multi-way electrode converter through the communication cable and the power supply cable, supplies power to the power supply electrodes, and receives and stores voltage and current value measuring data measured between the measuring electrodes M, N. The data acquisition result is automatically stored in a measurement host (an electrical method instrument); the measuring host (electrical method instrument) transmits the original data to the computer (remote host) through the communication software. The computer (remote host) converts the data into a data format required by processing software, and after preprocessing such as distortion point elimination, terrain correction and the like is carried out by a corresponding processing module, an apparent resistivity contour map is made; and then judging whether the pollution moves and whether the medicament reaches an expected range on the contour map according to the change characteristics of the apparent resistivity and the condition of medicament injection.
Fig. 4 is a working schematic diagram of the electrical method on-line monitoring system. As shown in fig. 4, a plurality of electrodes arranged in the underground monitoring well are connected with cables through a multi-way electrode converter (channel box), and the cables are connected with an electrical method instrument after being connected in series through cable heads; the electrical method instrument is connected with a remote host (computer) through a cloud platform, so that a data acquisition command issued by the remote host can be realized through the electrical method instrument. The solar panel is connected with the electrical method instrument through the solar intelligent charging controller and the solar storage battery. The electrical method and electrode 1 shown in fig. 4, for on-line acquisition of resistivity data; the solar panel 2 shown in fig. 4 is used for the power supply of an electrical method instrument. The data are uploaded in real time by building a cloud platform shown in the figure 4, and then data processing is carried out through inversion software Earth Imager 2D Version2.4.2 in a remote host (computer) after the data are uploaded. The electric method on-line monitoring system solves two problems of power supply and data transmission, and realizes the long-term unmanned monitoring target of electric method monitoring.
The method for monitoring the in-situ injection and remediation process of soil and underground water by adopting the electric-method online monitoring system comprises the following steps: preparing a plurality of corresponding underground electrodes in an underground monitoring well of a polluted area, arranging the electrodes at certain intervals, connecting the electrodes into cables with a certain sequence and rule through a multi-channel electrode converter (channel box), connecting the cables in series through a cable head and connecting the cables to a measuring host (electrical method instrument), and enabling a data acquisition command sent by a remote host to be realized through the measuring host (electrical method instrument); then the electrode is put into an underground monitoring well, a power supply is switched on, discharging and data acquisition (data acquisition according to a certain logic rule) are carried out in the underground monitoring well, and data processing is carried out through data inversion software; then, the sodium persulfate solution is injected into the polluted chlorohydrocarbon soil and underground water, and the resistivity change of the soil is observed respectively at the early stage, the middle stage and the later stage of the medicament injection, so as to judge whether the pollution moves and whether the medicament reaches the expected range. The value in the early stage of the observation process can be used as a background value to compare the difference of the data before and after the observation process.
According to the electrical method on-line monitoring system, Earth Imager 2D version2.4.2 is used as data inversion software, which is developed by AGI company in America, is mainly used for resistivity inversion processing, and meanwhile, has the functions of inversion processing and forward processing of excited data. When the software is used for inversion processing, the terrain correction of the surface electrode can be added.
The data inversion method used by the electrical method on-line monitoring system is the inversion of a smooth model.
The electric method on-line monitoring system comprises the following steps of data processing: importing data, checking data reliability, removing negative values, setting parameters, inversion processing, convergence checking and adjusting experience details.
Fig. 7 shows an equipotential field diagram when current is injected into the earth through electrodes in a hole (subsurface monitoring well). As can be seen from fig. 7, the current line flow direction in the form of a cross hole is 360 degrees, so that the current line can have a dense current line at a relatively deep place because the electrode can be placed at a target depth. This demonstrates that the cross-hole approach can provide better resolution in depth.
Fig. 5 and 6 show the monitoring results of two sections during the first filling. The monitoring results are obtained by processing the results by a time sequence inversion method, and fig. 5 and 6 show a conductivity distribution change chart, and the conductivity rises are shown at C, D, E and F in fig. 5, 6. The medicine filling agent is sodium persulfate, and the conductivity of the medicine is measured on site, wherein the conductivity of the medicine exceeds the measuring range of the instrument. Therefore, it can be judged that the target abnormality is a region where the conductivity is increased.
As shown in fig. 5, during the initial fill, there was very clear evidence of conductivity increase in the DW4-DW2 profile, with a major increase region at 16m depth (C), with the agent having a tendency to diffuse up and down, up to about 6 m. The diffusion down exceeds 20m and it is assumed that the main diffusion or dominant diffusion path is down, due to the conductivity rising to a higher degree below than the same distance above.
As shown in fig. 6, in the monitoring result graph of the DW1-DW3 profile, there is still an anomaly of conductivity increase at the lower 16m depth (F), but it does not exhibit a large area and continuous increase like in the DW4-DW2 profile. The reason for this is that the data measurement of the profile is performed at the latter stage of the drug administration, and the drug located in the deep portion is likely to migrate through the lower dominant pathway. In addition, at a position (position D) of about 2m in the surface layer of the DW1-DW3 cross-section, a phenomenon of conductivity increase occurs. The reason is that in the process of filling the medicine, the medicine overflows from the ground surface and permeates into a ground surface concrete layer due to inaccurate control of the medicine filling speed and the medicine absorption speed, so that the rise amplitude of the conductivity is extremely large. In addition, a large increase in conductivity occurs at a depth of 6m (E) of the DW1-DW3 profile, which may be caused by, on the one hand, the spilled agent reaching the area via the upper flow path, and on the other hand, local soil material properties making the water permeability around the area poor or very good in an abnormal area.
Claims (9)
1. An electric method on-line monitoring system for monitoring the in-situ injection and remediation process of soil and underground water is characterized by comprising an underground monitoring well, data acquisition hardware, data processing hardware and a cloud platform; the data acquisition hardware comprises a data acquisition instrument, namely an electrical method instrument, and also comprises a cable, a cable head, an electrode, a multi-way electrode converter and a jumper wire box; the data processing hardware comprises a remote host computer; a plurality of underground monitoring wells are arranged in the polluted area, and cables and a plurality of electrodes are distributed in the underground monitoring wells; the plurality of electrodes comprise a power supply electrode and a plurality of measuring electrodes; in an underground monitoring well, a plurality of electrodes are arranged at certain intervals, each electrode is connected with a thin cable, and a plurality of thin cables are bound together to form a thick cable, namely a multi-core cable; each electrode in the well is connected with a multi-way electrode converter arranged on the ground through a thin cable, and the switch of each electrode is controlled by the multi-way electrode converter; on the ground, each multi-way electrode converter is connected with two cables; the cable wires connected with the multi-way electrode converter are connected in series through cable heads and are connected to a data acquisition instrument, namely an electrical method instrument, through a jumper box; the electrical method instrument is connected with a remote host, namely a computer, through a cloud platform.
2. The electrical method on-line monitoring system for monitoring the in-situ injection and remediation process of soil and groundwater as claimed in claim 1, further comprising a solar panel connected to the electrical method instrument sequentially through the solar intelligent charging controller and the solar storage battery.
3. The system for monitoring the process of in-situ injection and remediation of soil and underground water as claimed in claim 1 or 2, wherein the data acquisition instrument, namely the electrical method instrument, is a GD series electrical method instrument produced by Shenzhen Misheng Geji technology Limited.
4. The electrical on-line monitoring system for monitoring in-situ injection remediation process of soil and groundwater as claimed in claim 3, wherein the GD-series electrical instruments are bi-directionally accessed and exchanged with cables laid on the ground throughout the contaminated area; that is: the front end and the rear end of the cable are both connected with the cable head; the cable head is internally provided with a switching device.
5. The electric-method on-line monitoring system for monitoring in-situ injection soil and underground water remediation process as claimed in claim 4, wherein the GD-series electric-method instruments are arranged on the ground in the whole pollution area in a sectional centralized wiring manner; the precise switching devices are arranged in the cable head in a segmented and centralized mode, and each high-density cable is managed by the cable head in a segmented mode.
6. The electrical online monitoring system for monitoring in-situ injection soil and groundwater remediation process of claim 3, wherein the GD system electrical instrument is a multi-channel device with 12 independent receiving channels supporting single-side 5-channel and double-side 10-channel synchronous measurement.
7. An electrical on-line monitoring system for monitoring in situ injection remediation of soil and groundwater as claimed in claim 3 wherein at a rock or gully in the underground monitoring well, a tap at that location on the cable is empty and no electrode is placed.
8. The electrical method on-line monitoring system for monitoring the in-situ injection soil and groundwater remediation process as claimed in claim 1 or 2, wherein the electrical method on-line monitoring system is characterized in that a plurality of underground monitoring wells are arranged in a polluted area, the coverage area of each underground monitoring well is 10-12 square meters, each underground monitoring well is provided with 40-55 electrodes, the electrode spacing is 0.5-0.8m, and data acquisition is carried out according to a certain logic rule.
9. The electrical on-line monitoring system for monitoring in-situ injection soil and groundwater remediation process of claim 7, wherein the electrical on-line monitoring system is provided with 4 underground monitoring wells in the contaminated area, each underground monitoring well is provided with one power supply electrode and 40 measurement electrodes, and the distance between the electrodes is 0.5 m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625352A (en) * | 2021-08-11 | 2021-11-09 | 王佳馨 | Urban underground space resistivity sensing system and data acquisition method based on cloud edge-end cooperation |
| CN114011859A (en) * | 2021-10-09 | 2022-02-08 | 华中科技大学 | BIM-based polluted soil remediation multi-machine remote operation system and working method |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625352A (en) * | 2021-08-11 | 2021-11-09 | 王佳馨 | Urban underground space resistivity sensing system and data acquisition method based on cloud edge-end cooperation |
| CN114011859A (en) * | 2021-10-09 | 2022-02-08 | 华中科技大学 | BIM-based polluted soil remediation multi-machine remote operation system and working method |
| CN114011859B (en) * | 2021-10-09 | 2023-04-21 | 华中科技大学 | BIM-based multi-machine teleoperation system for restoring polluted soil and working method |
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