Underground water source treatment system for organic complex polluted site

Abstract

The utility model relates to an underground water source treatment system for an organic complex polluted site. Comprising a separating wall used for enclosing the periphery of a polluted site, an extraction well located in the separating wall, a water pumping device connected to the interior of the extraction well, a water sample collecting device connected to the water pumping device, a monitoring device located in the extraction well and a central control system connected to the monitoring device and the water sample collecting device. And the water pumping device and the water sample collecting device are positioned outside the extraction well. According to the utility model, the technical problems that in the prior art, various works such as polluted soil risk management and control, source reduction and underground water quality detection and monitoring in the management and control period are independently implemented in the project implementation process, data statistics and integration are inconvenient, and water body sampling is complicated are solved. The underground water pollutant migration and diffusion path can be cut off, automatic source reduction is achieved, sampling is convenient, monitoring is automatic, operation is easy and convenient, intellectualization is achieved, and the construction period and cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to a groundwater source treatment system for organic complex contaminated sites. Background Art

[0002] Risk control, source reduction, and groundwater quality testing and monitoring during the control period were all carried out separately during the project implementation, which made it inconvenient to conduct data statistics and integration, and water sampling was complicated. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the utility model provides a groundwater source treatment system for organic complex contaminated sites, which solves the technical problems that the risk control of contaminated soil, source reduction and groundwater quality detection and monitoring during the control period are all implemented separately during the project implementation, which is inconvenient for data statistics and integration, and the water sampling is complicated.

[0004] The utility model discloses a groundwater source treatment system for an organic complex contaminated site, comprising a partition wall for enclosing the contaminated site, an extraction well located in the partition wall, a pumping device connected to the extraction well, a water sample collecting device connected to the pumping device, a monitoring device located inside the extraction well, and a central control system connected to the pumping device, the monitoring device and the water sample collecting device, wherein the pumping device and the water sample collecting device are located outside the extraction well.

[0005] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the pumping device is provided with an upper water outlet for connecting to an external sewage treatment device.

[0006] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the pumping device is provided with a horizontal water outlet, the water sample collecting device is provided with a water inlet, and the horizontal water outlet is connected to the water inlet.

[0007] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the water sample collection device is provided with a reflux port which is communicated with the extraction well.

[0008] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the water sample collection device is provided with a sampling port.

[0009] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the number of the extraction wells is multiple and the wells are arranged at intervals in the isolation wall.

[0010] The utility model is used for the underground water source treatment system of organic complex pollution sites. The further improvement lies in that the isolation wall is a cement mixing wall made by adopting the deep underground cement soil continuous wall construction method.

[0011] The utility model is further improved on the underground water source treatment system for organic complex contaminated sites in that the monitoring device comprises a water level sensor, a temperature sensor and a pressure sensor.

[0012] Compared with the existing technology, the effect of the utility model is positive and obvious. The utility model unifies the water treatment operation through the central control system connected to the pumping device, the monitoring device and the water sample collection device, solving the technical problems that the risk control of contaminated soil, source reduction and groundwater quality detection and monitoring during the control period are all implemented separately during the project implementation process in the existing technology, which is inconvenient for data statistics and integration, and the water sampling is complicated. The utility model can cut off the migration and diffusion path of pollutants in groundwater, and provide a system for groundwater source reduction, control-detection-monitoring of organic complex contaminated sites by laying out extraction wells, water sample collection devices, and monitoring devices, solving the problems of groundwater migration, cumbersome detection and sampling processes, and realizing automated source reduction, convenient sampling, and automated monitoring. It is easy to operate, intelligent, and saves time and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 The utility model is a schematic diagram of the structure of the groundwater source treatment system for organic complex contaminated sites. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1As shown, the utility model provides a groundwater source treatment system for an organic complex contaminated site, including a separation wall 2 for enclosing the contaminated site, an extraction well 3 located in the separation wall 2, a pumping device 14 connected to the extraction well 3, a water sample collecting device 7 connected to the pumping device 14, a monitoring device 4 located inside the extraction well 3, and a central control system 11 connected to the pumping device 14, the monitoring device 4 and the water sample collecting device 7; the pumping device 14 and the water sample collecting device 7 are located outside the extraction well 3.

[0017] The utility model unifies the water treatment operation by connecting the central control system 11 to the pumping device 14, the monitoring device 4 and the water sample collection device 7, solving the technical problems that the risk control of contaminated soil, source reduction and groundwater quality detection and monitoring during the control period are all implemented separately in the project implementation process in the prior art, which is inconvenient for data statistics and integration, and the water sampling is complicated. The utility model can cut off the migration and diffusion path of pollutants in groundwater, and provide a system for groundwater source reduction, control-detection-monitoring of organic complex contaminated sites by laying out extraction wells 3, water sample collection devices 7 and monitoring devices 4, solving the problems of groundwater migration, cumbersome detection and sampling processes, and realizing automated source reduction, convenient sampling and automated monitoring. It is easy to operate, intelligent, and saves time and costs.

[0018] Preferably, the pumping device 14 is provided with an upper water outlet 12 for connecting to an external sewage treatment device 10 , and the connection method may be a water pipe, or a PVC pipe, so that sewage treatment of groundwater is achieved through the external sewage treatment device 10 .

[0019] Preferably, the pumping device 14 is provided with a horizontal water outlet 13, and the water sample collecting device 7 is provided with a water inlet 9. The horizontal water outlet 13 is connected to the water inlet 9 by a water pipe, such as a PVC pipe. The groundwater pumped out by the pumping device 14 can flow to the water sample collecting device 7 to facilitate temporary storage of the water samples for detection.

[0020] Preferably, the water sample collecting device 7 is provided with a sampling port 8, so as to facilitate obtaining groundwater samples from the sampling port 8 to perform corresponding tests on the water samples.

[0021] Preferably, the water sample collecting device 7 is provided with a reflux port 15, which is connected to the extraction well 3, and the connection method can be a water pipe, which can be a PVC pipe. Further, a bracket 6 is provided at the bottom of the water sample collecting device 7 to raise the elevation of the water sample collecting device 7, so that there is a downward slope from the reflux port 15 to the extraction well 3, so that the excess water in the water sample collecting device 7 can flow back to the extraction well 3 by gravity.

[0022] Preferably, the number of the extraction wells 3 is multiple, and they are arranged at intervals in the isolation wall 2. In this embodiment, the extraction well 3 wellbore influence radius is considered to be 15m, the theoretical wellbore spacing is 26m, a total of 40 extraction wells 3 are arranged in the isolation wall 2 area, and a monitoring well is arranged outside the control area, with a well depth of 12m, an outer diameter of the well pipe of 315mm, and a material of PVC dedicated to the well pipe. The filter material outside the well pipe is made of hard gravel sand with good roundness and uniform particle size, with a particle size of 1.5-3.5mm, and the water filter pipe adopts a parallel spaced cross-cut slit water filter pipe perpendicular to the center line of the well pipe, and the screen slit width is 0.254mm.

[0023] Preferably, the isolation wall 2 is a cement mixing wall made by a deep underground cement soil continuous wall method. The isolation wall 2 is vertically arranged around the contaminated site, and the blocking depth must block the impermeable layer or weakly permeable layer 1 to ensure that pollutants in the groundwater will not cause secondary pollution to the surrounding area. The deep underground cement soil continuous wall method is also called the trench cutting deep mixing underground cement soil continuous wall method, in English, Trench cutting Re-mixing Deep wall metho, abbreviated as TRD method. In this embodiment, the effective thickness of the isolation wall 2 is 700mm, and the permeability coefficient of the isolation wall 2 is preferably less than 1.0×10-6cm / s. The wall material of the isolation wall 2 is composed of ordinary cement, bentonite slurry, water and some additives. The cement content is 25%, the water-cement ratio is 1.5, and the excavation fluid is mixed with sodium-based bentonite. About 100kg / m3 of bentonite is added to each cubic meter of stirred soil, and the content is not less than 20% of the weight of each cubic meter of soil, and the content of modified bentonite is not less than 5% of the weight of each cubic meter of soil.

[0024] Preferably, the monitoring device 4 includes a water level sensor, a temperature sensor and a pressure sensor. The monitoring device 4 is connected to the central control system 11 by a data transmission system 5. The monitoring device 4 can also be provided with other detection equipment as required.

[0025] During the construction, the isolation wall 2 is constructed, and the wall material is composed of ordinary cement, bentonite mud, water and some additives.

[0026] The extraction wells 3 are vertically arranged within the isolation wall 2, and the arrangement should overlap the interception area of ​​each well to prevent the contaminated groundwater from escaping from between the wells.

[0027] A monitoring device 4 is installed at the bottom of the extraction well 3, buried in the groundwater, and analyzed to obtain monitoring parameters. The monitoring device 4 can monitor parameters such as pressure, temperature, and water level through the data transmission system 5 and transmit them to the central control system 11.

[0028] Then install the data transmission system 5, the central control system 11 and the water sample collection device 7; install the data transmission system 5 on each monitoring device 4, and the data transmission system 5 is connected to the central control system 11; install a bracket under the water sample collection device 7, and use a PVC pipe to connect the reflux port 15 of the collection device to the inside of the extraction well 3, and the PVC pipe has a 30-degree inclination; the data transmission system 5 transmits the parameters of the monitoring device 4 to the central control system 11, and the central control system 11 can display all monitoring parameters, and can adjust the monitoring parameters of each extraction well 3;

[0029] After debugging is completed, when groundwater is extracted for treatment, the central control system 11 issues a pumping command to start the pumping device 14. The horizontal outlet 13 of the pumping device 14 is closed, and water is extracted from the upper outlet 12. The extracted groundwater is subjected to groundwater extraction treatment. The groundwater extraction treatment adopts the process of "water quality adjustment → advanced oxidation + inflection point chlorination → coagulation and sedimentation → quartz sand filtration → activated carbon adsorption". After reaching the acceptance standard of the sewage treatment plant, it is transported to the sewage treatment plant and discharged after the groundwater treatment meets the standard. The size of the regulating tank is 10m×10m×1.5m, and the material of the regulating tank is 0.9mmPVC mesh cloth. The design flow rate of on-site treatment is 25m 3 / h.

[0030] During on-site groundwater sampling and testing, the central control system 11 issues a sampling command, the horizontal water outlet 13 of the pumping device 14 is opened, and water flows into the water sample collection device 7 for temporary storage. The return port 15 and the sampling port 8 of the collection device 7 are closed. After the water sample is collected, the horizontal water outlet of the pumping device 14 is closed; the sampling port 8 is opened to collect water for water quality pollutant detection and analysis; after the water sampling is completed, the return port 15 is opened, and the water in the collection device 7 flows back to the extraction well 3.

[0031] The monitoring device 4 transmits the groundwater level, temperature, pressure and other parameters to the central control system 11 through the data transmission system 5. The management personnel can see the monitoring parameters of each extraction well 3 through the central control system, which is convenient for data analysis and management. The central control system 11 displays the monitoring data by category and has the function of remotely controlling water pumping and sampling. The central control system 11 can display all monitoring parameters and can adjust the monitoring parameters of each extraction well 3.

[0032] After groundwater extraction is completed, the risk control period begins, and the extraction well 3 can be used as a monitoring well. The groundwater quality can be monitored regularly through the monitoring device 4.

[0033] The parts not involved in the present utility model are the same as the prior art or can be implemented by the prior art. The above is only the preferred embodiment of the present utility model, and does not limit the present utility model in any form. Although the present utility model has been disclosed as the preferred embodiment, it is not used to limit the present utility model. Any technician familiar with this profession can make some changes or modify the technical content disclosed above to an equivalent embodiment of equivalent changes without departing from the scope of the technical solution of the present utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still belongs to the scope of the technical solution of the present utility model.

Claims

1. A groundwater source treatment system for organic complex contaminated sites, characterized in that: It includes an isolation wall for enclosing the periphery of a contaminated site, an extraction well located in the isolation wall, a pumping device connected to the extraction well, a water sample collecting device connected to the pumping device, a monitoring device located inside the extraction well, and a central control system connected to the pumping device, the monitoring device and the water sample collecting device; the pumping device and the water sample collecting device are located outside the extraction well.

2. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The pumping device is provided with an upper water outlet for connecting to an external sewage treatment device.

3. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The water pumping device is provided with a horizontal water outlet, and the water sample collecting device is provided with a water inlet, and the horizontal water outlet is connected to the water inlet.

4. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The water sample collecting device is provided with a reflux port, and the reflux port is communicated with the extraction well.

5. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The water sample collecting device is provided with a sampling port.

6. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: There are multiple extraction wells, which are arranged at intervals in the isolation wall.

7. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The isolation wall is a cement mixing wall made by using a deep underground cement soil continuous wall construction method.

8. The underground water source treatment system for organic complex contaminated sites according to claim 1 is characterized in that: The monitoring device includes a water level sensor, a temperature sensor and a pressure sensor.

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