Underground water in-situ remediation integrated device

Abstract

The utility model discloses a groundwater in-situ remediation integrated device, which comprises a mobile chassis, a dosing system, a monitoring system and a control device, the dosing system comprises a groundwater dosing container, a dosing pipeline, a dosing pump, a medicament mixing and stirring tank, a solid powder temporary storage bin and a liquid medicament storage tank, the groundwater dosing container is arranged in a medicament injection well, and the monitoring system is connected with the monitoring system. The chemical feeding pipeline is connected with an outlet of the chemical feeding pump, an inlet of the chemical feeding pump is connected with the chemical mixing and stirring tank, and the chemical mixing and stirring tank is communicated with the solid chemical powder temporary storage bin and the liquid chemical storage tank; the monitoring system comprises a monitoring pipeline, a monitoring probe and a monitoring well, the monitoring well is located at the downstream of underground water, and the monitoring probe is placed below the underground water stable water level of the monitoring well. The control equipment is connected with the monitoring probe through a monitoring pipeline and is also connected with the dosing pump. The device is high in integration level, high in automation degree and convenient to implement repairing operation.

Description

Technical Field

[0001] The utility model relates to the field of contaminated groundwater restoration and management, and in particular to an integrated device for in-situ restoration of groundwater. Background Art

[0002] In the past, my country's industrial production management was extensive, and a large amount of pollutants entered the soil and groundwater. However, due to the fluidity and concealment of groundwater, its pollution situation is often unknown. Because groundwater is closely related to soil and there is a natural process of flow complementarity with surface water, the spread of contaminated groundwater will cause soil and surface water pollution, seriously threatening human health and environmental safety, and even leading to pollution accidents.

[0003] At present, the remediation of contaminated groundwater at home and abroad can be divided into two categories according to technical principles: in situ remediation and ex situ remediation.

[0004] Ex situ repair has the disadvantages of complicated process, high repair cost, need for special site, many types of equipment, large size, inconvenience in transportation, cleaning and maintenance, etc. It is especially not suitable for repair sites with limited space and inconvenient equipment installation.

[0005] The in-situ remediation method can be used to achieve on-site treatment of contaminated groundwater and reduce the groundwater extraction and injection process. However, the existing in-situ remediation device cannot monitor the remediation results of groundwater in real time, let alone control the dosing of injection wells according to the remediation results. In addition, when remediating groundwater, it is often necessary to mix solid powder into liquid mixed agents before use to achieve the remediation effect. However, after some solid powders are configured into liquid agents, their properties are prone to change after long-term storage, thereby reducing the use effect. Therefore, it is necessary to prepare the solid powder for immediate use. The existing groundwater in-situ remediation equipment does not have a drug mixing mechanism for preparing solid powder for immediate use. If the liquid mixed agent is manually prepared at the work site, the process is cumbersome, time-consuming and labor-intensive.

[0006] In summary, it is necessary to develop an integrated device for in-situ groundwater remediation to solve the problem of groundwater remediation in sites with restricted conditions. At the same time, it is necessary to monitor the remediation effect in real time, adjust the remediation process parameters in time, simplify the operating procedures, improve the degree of operation automation, and achieve integrated and efficient remediation. Utility Model Content

[0007] The technical problem to be solved by the utility model is that, in view of the shortcomings of the existing groundwater in-situ remediation devices that cannot monitor the remediation results of groundwater in real time, and cannot control the dosing of drugs in the injection wells according to the remediation results, the utility model provides an integrated groundwater in-situ remediation device that can monitor the remediation results of groundwater in real time and control the dosing of drugs in the injection wells according to the remediation results.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] An integrated device for groundwater in-situ remediation, including a mobile chassis, a dosing system, a monitoring system and control equipment, wherein:

[0010] The dosing system includes a plurality of groundwater dosing containers, dosing pipelines, diverters, dosing pumps, a medicine mixing and stirring tank, a solid medicine powder temporary storage silo, and a liquid medicine storage tank. The groundwater dosing container is arranged in a medicine injection well upstream of the groundwater, and is connected to the outlet of the dosing pump through the dosing pipeline and the diverter, and the inlet of the dosing pump is connected to the medicine mixing and stirring tank, and the medicine mixing and stirring tank is connected to the solid medicine powder temporary storage silo and the liquid medicine storage tank;

[0011] The monitoring system includes a monitoring pipeline, a monitoring probe, and a monitoring well. The monitoring well is located downstream of the groundwater, and the monitoring probe is placed below the stable water level of the groundwater in the monitoring well.

[0012] The dosing pump, the medicine mixing and stirring tank, the solid medicine powder temporary storage silo, the liquid medicine storage tank and the control equipment are placed on the mobile chassis. The control equipment is connected to the monitoring probe through a monitoring pipeline, and the control equipment is connected to the dosing pump.

[0013] In this way, the utility model realizes real-time monitoring of the repair results by setting up a monitoring system and connecting the control equipment to the monitoring probe in the monitoring well downstream of the groundwater through a monitoring pipeline. At the same time, the control equipment is connected to the dosing pump, and the dosing pump can be adjusted in real time according to the repair results, thereby realizing real-time adjustment of the dosing amount.

[0014] It should be noted that the control device is connected to the monitoring probe and receives the monitoring information returned by the monitoring probe. However, real-time adjustment of the dosing pump etc. according to the monitoring information is an existing technology and is therefore not described in detail here.

[0015] Preferably, the groundwater in-situ remediation integrated device also includes an emergency extraction system, which includes an extraction pipeline, an extraction pump, and an emergency extraction well. The emergency extraction well is located downstream of the monitoring well. The extraction pump is connected to one end of the extraction pipeline and placed at a certain depth below the groundwater level of the extraction well. The other end of the extraction pipeline is connected to the groundwater dosing container. In this way, when the control device uses the monitoring analyzer to monitor the groundwater remediation results in real time, if the remediation results do not reach the target value, the extraction pump can be started in time to extract the excessive groundwater and recharge it to the upstream injection well to continue the remediation to prevent the spread of pollution.

[0016] Preferably, the extraction pump is a submersible pump for wells.

[0017] Preferably, an electronic flowmeter and a first electric valve are arranged between the groundwater dosing container and the diverter, and the electronic flowmeter and the first electric valve are connected to the control device respectively. In this way, the control device can monitor the dosing amount of each dosing well in real time through the electronic flowmeter, and adjust the amount of medicine injected into the dosing well in real time through the first electric valve.

[0018] Preferably, the dosing pump is a metering pump, a second electric valve is provided between the dosing pump and the pharmaceutical mixing and stirring tank, and the second electric valve and the stirring motor of the pharmaceutical mixing and stirring tank are respectively connected to the control device. In this way, the control device can adjust the input amount of the dosing pump in real time through the second electric valve, and control the stirring motor of the pharmaceutical mixing and stirring tank in real time.

[0019] Preferably, a discharge port is provided at the bottom of the solid powder temporary storage silo, and a ball valve is provided at the discharge port for controlling the discharge size. The liquid medicine storage tank is connected to the medicine mixing and stirring tank via a first medicine delivery pipeline, and a self-priming pump and a third electric valve are provided on the first medicine delivery pipeline. The ball valve, the self-priming pump and the third electric valve are connected to the control device respectively. In this way, the control device can adjust the output of the solid powder temporary storage silo in real time through the ball valve, and adjust the output of the liquid medicine storage tank in real time through the self-priming pump and the third electric valve, and then adjust the ratio of solid medicine powder to liquid medicine in the medicine mixing and stirring tank in real time according to the monitoring results.

[0020] Preferably, a slotted pipe is installed at the lower part of the groundwater dosing container to ensure that the agent is mixed with the groundwater as evenly as possible and covers the entire water layer thickness.

[0021] Preferably, the integrated device for in-situ remediation of groundwater further includes a lifting mechanism, which is connected to the power system and the control device, and is disposed between the solid powder temporary storage bin and the mobile chassis. When the solid powder is not in use, the lifting mechanism is retracted to place the solid powder temporary storage bin in the lowest position. When the solid powder is needed, the solid powder is first loaded into the solid powder temporary storage bin, and then the solid powder temporary storage bin is raised to a set position by the lifting mechanism, so that the solid powder can slide into the medicine mixing tank by itself through the powder delivery pipeline. In this way, the solid powder can be prepared and used immediately by the lifting mechanism.

[0022] Preferably, the integrated device for in-situ groundwater remediation is characterized in that it also includes a hydraulic leg assembly, which is symmetrically arranged on the mobile chassis along the longitudinal intervals of the mobile chassis and connected to the power system.

[0023] Preferably, the discharge port of the solid medicine powder temporary storage silo is connected to the medicine mixing and stirring tank via an inclined powder conveying pipeline, and the inclination angle of the powder conveying pipeline is greater than the natural repose angle of the solid medicine powder, and a ball valve is arranged between the discharge port and the powder conveying pipeline.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] (1) The utility model can control the output of the solid powder temporary storage silo and the liquid agent storage tank in real time through the control system according to different pollution factors, so as to use different agents for targeted remediation work. The solid powder can be mixed into liquid agent for use, or the solid powder and liquid agent can be mixed for use, or only liquid agent can be used as the remediation agent, so as to realize flexible combination of agents, ready to use, ensure the effect of the agent use, and have good targeting and flexibility for groundwater target pollutants.

[0026] (2) The utility model can also monitor the results of groundwater restoration in real time through the monitoring analyzer of the control equipment. When the restoration fails to achieve the target, the extraction pump is promptly started to extract the groundwater exceeding the standard and re-inject it into the upstream injection well to continue the restoration and prevent the spread of pollution.

[0027] (3) The number of devices of the utility model can be modularly combined, and the type and quantity of reagents can be adjusted according to the target pollution factors of the remediation, and the number of storage tanks for solid powder and liquid reagents can be adjusted to store different reagents separately. The control system can also be used to control the dosing of several injection wells at the same time, which is conducive to saving the amount of reagents used and improving the remediation efficiency. The monitoring system can also monitor the remediation results of groundwater in real time, and timely feedback the remediation effect to the control device, and adjust the amount of reagent added or stop the addition of reagents through the control device to ensure the rational use of reagents and avoid waste. The design of the ball valve is convenient for adjusting the discharge amount of solid powder, and the design of the self-priming pump is convenient for adjusting the flow rate of liquid reagents. The design of the control device realizes the automatic start and stop of the electronic flow meter, the first, second and third electric valves, the dosing pump, the stirring motor, the ball valve, the electric lifting mechanism, the self-priming pump, the extraction pump, and the monitoring probe.

[0028] (4) The utility model can realize the repair of groundwater at different depths through the injection well.

[0029] (5) The utility model integrates the equipment for repair work on a mobile chassis. The equipment has a high degree of integration and automation, and has its own power system and can move autonomously. The tracked chassis can also adapt to a variety of site environments, making it easier to implement repair work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the integrated device for in-situ groundwater remediation in Example 1 when remediating groundwater.

[0032] Figure 2 yes Figure 1 A magnified view of the groundwater dosing container.

[0033] Figure 3 yes Figure 1 Enlarged view of the middle diverter, where a is the side view and b is the bottom view.

[0034] Figure 4 yes Figure 1 Schematic diagram of the internal structure of the Chinese medicine mixing and stirring tank.

[0035] Figure 5 yes Figure 1 Schematic diagram of the structure of the temporary storage silo for Chinese medicine powder.

[0036] In the figure: 1. injection well, 2. groundwater dosing container, 2.1. slotted pipe, 3. electronic flow meter, 4. first electric valve, 5. dosing pipeline, 6. groundwater return pipeline, 7. diverter, 7.1. inlet, 7.2. partition plate, 7.3. interface, 8. dosing pump, 9. hydraulic leg assembly, 10. reagent mixing and stirring tank, 10.1. stirring shaft, 11. stirring blade, 12. stirring motor, 13. powder conveying pipeline, 14. solid powder temporary storage silo, 15. ball valve, 16. lifting mechanism, 17. liquid reagent conveying pipeline, 18. self-priming pump, 19. liquid reagent storage tank, 20. power system, 21. control equipment, 22. monitoring pipeline, 23. monitoring probe, 24. monitoring well, 25. extraction pipeline, 26. extraction pump, 27. emergency extraction well, 28. mobile chassis. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0038] For the convenience of description, the relative position relationship of each component, such as up, down, left, right, etc., is described according to the layout direction of the drawings in the specification, and does not limit the structure of this patent.

[0039] like Figure 1 As shown, an embodiment of the integrated device for in-situ groundwater remediation of the utility model includes a mobile chassis 28, a dosing system, a monitoring system, an emergency extraction system, a power system 20 and a control device 21. The control device 21 includes a control power supply, a signal receiver, and a monitoring analyzer.

[0040] The mobile chassis 28 includes a chassis and a running mechanism, and the power system 20 is arranged on the chassis and connected to the running mechanism to provide autonomous power for the running mechanism. In this embodiment, the mobile chassis 28 adopts an autonomously movable crawler-type mobile chassis, but is not limited thereto and can also be replaced with a wheeled chassis.

[0041] The mobile chassis 28 is provided with a dosing pump 8 , a medicine mixing and stirring tank 10 , a solid medicine powder temporary storage silo 14 , a liquid medicine storage tank 19 , a power system 20 , and a control device 21 .

[0042] The integrated device for in-situ groundwater remediation also includes an even number of hydraulic leg assemblies 9, which are symmetrically arranged on the mobile chassis 28 along the longitudinal intervals of the mobile chassis 28 and connected to the power system 20. When the device is working, it is powered by the power system 20, so that the hydraulic leg assemblies 9 serve as the main supporting structure to ensure that the entire device is in a horizontal state, and at the same time bear the weight of the entire device to ensure the overall stability of the device and safe operation.

[0043] The dosing system includes a groundwater dosing container 2, an electronic flowmeter 3, a first electric valve 4, a dosing pipeline 5, a diverter 7, a dosing pump 8, a medicine mixing and stirring tank 10, a solid medicine powder temporary storage silo 14, and a liquid medicine storage tank 19. Among them, one end of the groundwater dosing container 2 is placed in the upstream injection well 1, and the other end is connected to the pump outlet of the dosing pump 8 through the diverter 7; when in use, a number of injection wells 1 are set up upstream of the groundwater according to the site conditions, and a groundwater dosing container 2 is installed in each injection well 1. An electronic flowmeter 3 and a first electric valve 4 are set between the groundwater dosing container 2 and the diverter 7 for measuring the dosage of the medicine. The electronic flowmeter 3 and the first electric valve 4 are respectively connected to the control device 21, and the dosage of the medicine in each injection well 1 is controlled in real time by the control device 21.

[0044] The dosing pump 8 is a metering pump, and the pump inlet is connected to the reagent mixing and stirring tank 10. A second electric valve for controlling the flow of the dosing pump 8 is arranged between the dosing pump 8 and the reagent mixing and stirring tank 10. The dosing pump 8, the second electric valve and the stirring motor 12 are respectively connected to the control device 21, and the actions of the dosing pump 8, the second electric valve and the stirring motor 12 are controlled by the control device 21. When using solid powder as a groundwater remediation agent, the powder must first be added to the reagent mixing and stirring tank 10, and fully stirred and dissolved with the liquid agent or clean water to prepare a liquid agent, and then injected into the groundwater by the dosing pump 8 through the groundwater dosing container 2.

[0045] The solid powder temporary storage silo 14 and the liquid medicine storage tank 19 are arranged in the middle of the mobile chassis 28, and are used to temporarily store solid powder and liquid medicine respectively. A discharge port is provided at the bottom of the solid powder temporary storage silo 14, and a ball valve 15 is provided at the discharge port for controlling the discharge speed, and the ball valve 15 is connected to the control device 21. The top of the liquid medicine storage tank 19 is connected to the medicine mixing and stirring tank 10 through the first medicine delivery pipeline 17, and the first medicine delivery pipeline 17 is provided with a self-priming pump 18 and a third electric valve, and the self-priming pump 18 and the third electric valve are connected to the control device 21 for controlling the liquid medicine delivery amount. A monitoring analyzer is arranged in the control device 21 to record the monitoring data of the repair results in real time, and the operation of the self-priming pump 18, the dosing pump 8, the third electric valve and the ball valve 15 is controlled according to the real-time data of the monitoring analyzer, so as to timely adjust the dosage, dosage ratio and injection time of the medicine.

[0046] The integrated device for in-situ remediation of groundwater also includes an electric lifting mechanism 16, which is connected to a power system 20 and a control device 21. The number of the lifting mechanisms 16 is one group, which is arranged between the solid powder temporary storage bin 14 and the mobile chassis 28. When the device is not in use, the solid powder temporary storage bin 14 and the lifting mechanism 16 are at the lowest position. When solid powder is needed, the powder is first loaded into the solid powder temporary storage bin 14, and then the solid powder temporary storage bin 14 is raised to a set position by the lifting mechanism 16, so that the discharge port of the solid powder temporary storage bin 14 is connected to the agent mixing and stirring tank 10 through the powder conveying pipe 13, and the solid powder slides into the agent mixing and stirring tank 10 by itself through the powder conveying pipe 13, and is fully stirred and dissolved with the liquid agent or clean water to be prepared into a liquid agent, and then injected into the groundwater by the dosing pump 8 through the groundwater dosing container 2.

[0047] The monitoring system includes a monitoring pipeline 22, a monitoring probe 23, and a monitoring well 24; the monitoring well 24 is located downstream of the groundwater, and the monitoring probe 23 is placed at least 0.5m below the stable water level of the groundwater in the monitoring well 24. The monitoring probe 23 is connected to the control device 21 through the monitoring pipeline 22. The control device 21 records the monitoring data in real time through the monitoring analyzer, and controls the operation of the dosing pump 8, the electric control valve 4, the reagent mixing tank 10, the ball valve 15, and the self-priming pump 18 according to the real-time data, and timely adjusts the reagent dosage, dosage ratio and injection interval.

[0048] The emergency extraction system includes an extraction pipeline 25, an extraction pump 26, and an emergency extraction well 27; the emergency extraction well 27 is located downstream of the monitoring well 24, and the extraction pump 26 is a well submersible pump, which is connected to the end of the extraction pipeline 25 and placed at a certain depth below the groundwater level of the emergency extraction well 27, and the other end of the extraction pipeline 25 is connected to the groundwater dosing container 2. When the control device 21 finds through the monitoring analyzer that the repair has not reached the target, the extraction pump 26 is started in time to extract the excessive groundwater and recharge it to the upstream injection well 1 to continue the repair to prevent the spread of pollution.

[0049] When the control device is in use, the control power supply is electrically connected to the electronic flow meter, the first electric valve, the dosing pump, the stirring motor, the ball valve, the lifting mechanism, the self-priming pump, the hydraulic support leg assembly, and the extraction pump respectively; there are multiple signal receivers, which are respectively connected to the electronic flow meter, the first electric valve, the dosing pump, the stirring motor, the ball valve, the lifting mechanism, the self-priming pump, the hydraulic support leg assembly, and the extraction pump in a one-to-one correspondence, and the signal receiver is electrically connected to the monitoring analyzer and the control power supply.

[0050] See also Figure 2 The lower end of the groundwater dosing container 2 is a laser cut pipe 2.1, which ensures that the agent and groundwater are mixed as evenly as possible and cover the entire water layer thickness. The cut pipe 2.1 is threadedly connected to the groundwater dosing container 2.

[0051] See also Figure 3 The cross section of the diverter 7 is trumpet-shaped, and the inlet 7.1 is small and connected to the outlet of the dosing pump 8. The outlet is enlarged to set a plurality of interfaces 7.3, each interface 7.3 is connected to a groundwater dosing container 2, and the connection method is threaded connection; in order to ensure that the flow rate of the agent at each interface 7.3 is uniform, a partition plate 7.2 is arranged inside the diverter 7, and the partition plates 7.2 are arranged at equal intervals at the inlet 7.1 to evenly distribute the liquid agent entering from the inlet 7.1.

[0052] See also Figure 4A stirring motor 12 is provided on the top of the pharmaceutical mixing and stirring tank 10, and the stirring motor 12 is connected to the stirring shaft 10.1 through a reducer. A plurality of stirring blades 11 are symmetrically arranged on the stirring shaft 10.1; the stirring shaft 10.1 and the stirring blades 11 are located in the pharmaceutical mixing and stirring tank 10; the number of the stirring blades 11 is an even number, and they are arranged opposite to each other at equal intervals along the stirring shaft 10.1, and the projection of any two opposite stirring blades 11 on the bottom surface of the pharmaceutical mixing and stirring tank is S-shaped.

[0053] See also Figure 1 and 5 The solid powder temporary storage bin 14 includes a cylindrical structure at the top and an inverted conical structure at the bottom, and the cylindrical structure and the conical structure are integrally formed; a powder conveying pipe 13 for guiding the powder into the medicine mixing tank 10 is obliquely provided at the discharge port of the solid powder temporary storage bin 14, and the inclination angle of the powder conveying pipe 13 is greater than the natural repose angle of the solid powder, and the cross-section of the powder conveying pipe 13 is the same as the area of ​​the discharge port, and the ball valve 15 is arranged between the discharge port and the powder conveying pipe 13.

[0054] The utility model can provide multiple solid powder temporary storage silos 14 for the integrated device for in-situ remediation of groundwater. The multiple solid powder temporary storage silos 14 are modularly combined to realize separate storage of different medicines. When in use, the type and quantity of medicines are adjusted in a targeted manner according to the target pollution factor for remediation. The solid powder can be prepared into a liquid medicine for use, or the solid powder and liquid medicine can be mixed for use, or only the liquid medicine can be used as the remediation medicine, thus realizing flexible combination of medicines and ready-to-use preparation, thereby ensuring the effect of the use of the medicines and having good targeting and flexibility for the target pollutants in groundwater.

[0055] The utility model monitors the restoration result of groundwater in real time through a monitoring analyzer, and controls the dosing of several injection wells 1 at the same time, which is beneficial to saving the amount of medicine used and improving the restoration efficiency; when the restoration fails to achieve the goal, the extraction pump 26 is started in time to extract the excess groundwater and recharge it to the upstream injection well 1 to continue the restoration and prevent the pollution from spreading.

[0056] The utility model integrates the equipment for the in-situ restoration of groundwater into a mobile chassis 28. The equipment has a high degree of integration and automation, has its own power system, can move autonomously, can adapt to a variety of site environments, and is convenient for the implementation of restoration operations.

[0057] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. An integrated device for in-situ groundwater remediation, comprising a mobile chassis, a dosing system, a monitoring system and a control device, characterized in that: The dosing system includes a plurality of groundwater dosing containers, dosing pipelines, diverters, dosing pumps, a medicine mixing and stirring tank, a solid medicine powder temporary storage silo, and a liquid medicine storage tank. The groundwater dosing container is arranged in a medicine injection well upstream of the groundwater, and is connected to the outlet of the dosing pump through the dosing pipeline and the diverter, and the inlet of the dosing pump is connected to the medicine mixing and stirring tank, and the medicine mixing and stirring tank is connected to the solid medicine powder temporary storage silo and the liquid medicine storage tank; The monitoring system includes a monitoring pipeline, a monitoring probe, and a monitoring well. The monitoring well is located downstream of the groundwater, and the monitoring probe is placed below the stable water level of the groundwater in the monitoring well. The dosing pump, the medicine mixing and stirring tank, the solid medicine powder temporary storage silo, the liquid medicine storage tank and the control equipment are placed on the mobile chassis. The control equipment is connected to the monitoring probe through a monitoring pipeline, and the control equipment is connected to the dosing pump.

2. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: It also includes an emergency extraction system, which includes an extraction pipeline, an extraction pump, and an emergency extraction well. The emergency extraction well is located downstream of the monitoring well. The extraction pump is connected to one end of the extraction pipeline and placed at a certain depth below the groundwater level of the extraction well. The other end of the extraction pipeline is connected to the groundwater dosing container.

3. The integrated device for in-situ groundwater remediation according to claim 2 is characterized in that: The extraction pump is a submersible pump for wells.

4. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: An electronic flow meter and a first electric valve are arranged between the groundwater dosing container and the diverter, and the electronic flow meter and the first electric valve are respectively connected to the control device.

5. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: The dosing pump is a metering pump. A second electric valve is arranged between the dosing pump and the medicine mixing and stirring tank. The second electric valve and the stirring motor of the medicine mixing and stirring tank are respectively connected to the control device.

6. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: A discharge port is provided at the bottom of the solid powder temporary storage silo, and a ball valve is provided at the discharge port for controlling the discharge size. The liquid medicine storage tank is connected to the medicine mixing and stirring tank via a first medicine delivery pipeline, and a self-priming pump and a third electric valve are provided on the first medicine delivery pipeline. The ball valve, the self-priming pump and the third electric valve are respectively connected to the control device.

7. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: A slotted pipe is installed at the lower part of the groundwater dosing container.

8. The integrated device for in-situ groundwater remediation according to claim 1 is characterized in that: It also includes a lifting mechanism, which is connected to the power system and the control device, and is arranged between the solid powder temporary storage silo and the mobile chassis.

9. The integrated device for in-situ groundwater remediation according to claim 1, characterized in that: It also includes a hydraulic leg assembly, which is symmetrically arranged on the mobile chassis along the longitudinal interval of the mobile chassis and connected to the power system.

10. The integrated device for in-situ groundwater remediation according to claim 1, characterized in that: The discharge port of the solid medicine powder temporary storage bin is connected to the medicine mixing and stirring tank through an inclined powder conveying pipeline, and the inclination angle of the powder conveying pipeline is greater than the natural repose angle of the solid medicine powder. A ball valve is arranged between the discharge port and the powder conveying pipeline.

Images