In-situ integrated repair well for irregular refuse landfill

Abstract

The utility model provides an irregular refuse landfill in-situ integrated repair well which is characterized in that the repair well is arranged perpendicular to the ground plane, the lower end of the repair well extends to the position below a water-bearing layer of a polluted area, and the upper end of the repair well extends to the ground; the liquid injection repairing unit comprises a liquid injection well pipe arranged in the repairing well, the bottom of the liquid injection well pipe extends to the percolate section, and the top of the liquid injection well pipe extends out of the ground; a plurality of liquid injection branch pipes located at different depth positions are arranged in the liquid injection well pipe, all the liquid injection branch pipes are connected with a liquid injection main pipe located above the ground, and the liquid injection main pipe is connected with a liquid storage tank; the gas injection repair unit comprises a gas injection well pipe arranged in the repair well, and the top of the gas injection well pipe extends out of the ground and is closed; the top of the gas injection well pipe is connected with a gas injection pipe which is connected with gas injection equipment; the side face of the gas injection well pipe is connected with an extraction pipe which is connected with extraction equipment. And filter material filling layers are arranged among the liquid injection well pipe, the gas injection well pipe and the repair well.

Description

Technical Field

[0001] The utility model relates to the field of pollution remediation of informal garbage landfills, in particular to an in-situ integrated remediation well of informal garbage landfills. Background Art

[0002] Informal landfills usually have problems such as irregular management and backward treatment technology, which lead to impacts on the surrounding environment and human health, and pose potential pollution risks to groundwater, air, etc. The remediation methods used in the market are mainly ex situ treatment, and often use garbage screening and comprehensive utilization technology. For areas with low development demand, in situ treatment mode is usually selected, using aerobic accelerated stabilization technology and in situ ecological closure technology. The in situ remediation currently used often relies solely on one method or technology, which is difficult to achieve comprehensive remediation of multiple pollutions. It usually requires a combination of multiple remediation technologies or the use of a large amount of equipment. The remediation efficiency is low, the remediation time is long, and the remediation cost is increased.

[0003] In order to solve various pollution problems such as leachate, landfill gas, soil, etc., efficient integrated remediation equipment is urgently needed. Utility Model Content

[0004] In order to solve the above problems, the utility model aims to provide an in-situ integrated repair well for informal landfills.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides an in-situ integrated remediation well for informal garbage landfills, which is characterized by comprising: a remediation well, a liquid injection remediation unit, and a gas injection remediation unit. The remediation well is arranged perpendicular to the ground plane, the lower end of the remediation well extends to below the aquifer in the contaminated area, and the upper end of the remediation well extends to the ground; the liquid injection remediation unit comprises a liquid injection well pipe arranged in the remediation well, the bottom of the liquid injection well pipe extends to the leachate section, and the top of the liquid injection well pipe extends out of the ground; a plurality of liquid injection branch pipes at different depths are arranged in the liquid injection well pipe, and all the liquid injection branch pipes are connected to the liquid injection branch pipes at the ground The liquid injection main pipe above the surface is connected, the liquid injection main pipe is connected to the liquid storage tank, and the liquid injection main pipe is provided with an injection pump and a liquid injection control valve; the gas injection repair unit includes a gas injection well pipe arranged in the repair well, the top of the gas injection well pipe extends out of the ground and is closed; the top of the gas injection well pipe is connected to the gas injection pipe, the gas injection pipe is connected to the gas injection equipment, and the gas injection control valve is provided on the gas injection pipe; the side of the gas injection well pipe is connected to the extraction pipe, the extraction pipe is connected to the extraction equipment, and the extraction control valve is provided on the extraction pipe; a filter material layer is filled between the liquid injection well pipe, the gas injection well pipe and the repair well.

[0007] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following features: a plurality of sensor probe installation sites are also provided in the filling filter layer for installing one or more of temperature sensors, humidity sensors, and water quality detection sensors.

[0008] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following characteristics: wherein the filling filter material layer is composed of an upper bentonite layer and a lower gravel layer.

[0009] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following feature: wherein, a nozzle is provided at the bottom of each liquid injection branch pipe.

[0010] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following features: wherein the liquid injection branch pipe includes a first liquid injection branch pipe, a second liquid injection branch pipe, and a third liquid injection branch pipe.

[0011] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following feature: a plurality of gas injection channels are provided in the gas injection well pipe from top to bottom.

[0012] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following feature: a pressure gauge is provided on the extraction pipe.

[0013] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following feature: an exhaust hole is provided at the top of the gas injection well pipe.

[0014] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following feature: wherein, the portion of the upper end of the remediation well extending to the ground is provided with a well cap.

[0015] Furthermore, the in-situ integrated remediation well of the informal landfill provided by the present invention may also have the following features: well plugs are respectively provided at the bottom of the liquid injection well pipe and the gas injection well pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model of the in-situ integrated remediation well for informal landfills realizes the remediation function of landfill leachate, landfill gas and soil pollution through a single well for informal landfills. The liquid injection remediation unit can realize chemical remediation, and the detection unit can also obtain remediation parameters such as temperature, humidity, and water quality, which can be provided to the staff as a reference for the dosage of remediation agents to achieve scientific and reasonable remediation. In addition, the gas injection remediation unit accelerates the biodegradation of organic pollutants in the soil through gas injection and gas extraction cycle control, and utilizes multiple gas injection channels to achieve layered gas injection and uniform gas distribution, saving resources and effectively improving the in-situ aerobic stabilization efficiency. The utility model improves the overall remediation efficiency and has the advantages of simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an in-situ integrated remediation well for an informal landfill of the present invention; markings in the figure: 1. remediation well; 11. bentonite layer; 12. gravel layer; 13. well cap; 2. liquid injection well pipe; 21. liquid injection branch pipe; 22. nozzle; 23. well plug; 24. liquid injection control valve; 25. liquid injection pump; 26. liquid storage tank; 27. liquid injection main pipe; 3. sensor; 4. gas injection well pipe; 41. gas injection channel; 42. well plug; 43. exhaust hole; 44. gas injection pipe; 45. gas injection control valve; 46. extraction pipe; 47. pressure gauge; 48. extraction control valve. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate the technical solutions of the present invention.

[0020] like Figure 1 As shown, the embodiment of the present invention provides an in-situ integrated remediation well for informal landfills, which includes a remediation well 1, a liquid injection remediation unit, a gas injection remediation unit, and a detection unit.

[0021] Remediation well 1 is set perpendicular to the ground, with its lower end extending below the contaminated area's aquifer and its upper end reaching the surface. The underground portion of well 1 features a curved pipe section at the target depth. This section follows conventional technology, consisting of regularly sized holes in the well's outer wall, with diameters ranging from 1.5 mm to 3 mm. These holes not only allow water to flow in but also prevent soil or rock particles from flowing into the well wall, providing support and protection. The upper portion of well 1, which extends to the surface, is fitted with a well cap 13.

[0022] A liquid injection well pipe 2 and a gas injection well pipe 4 are provided in the repair well 1. The liquid injection well pipe 2 and the gas injection well pipe 4 are both PVC pipes. A well plug 23 is provided at the bottom of the liquid injection well pipe 2, and a well plug 42 is provided at the bottom of the gas injection well pipe 4. The well plug is a threaded end plug, which has the function of sealing. For the liquid injection well pipe, it can improve the injection effect and prevent the leakage of the repair agent and the blockage in the pipe. For the gas injection well pipe, it can prevent the gas leakage in the well, avoid the waste of gas and affect the gas injection effect, and also prevent the backflow of well water. Between the liquid injection well pipe 2, the gas injection well pipe 4 and the repair well 1 is a filling filter material layer, which is composed of an upper bentonite layer 11 and a lower gravel layer 12.

[0023] The liquid injection repair unit includes a liquid injection well pipe 2, a liquid injection branch pipe 21, a liquid injection main pipe 27, a liquid storage tank 26, a liquid injection pump 25, and a liquid injection control valve 24.

[0024] The bottom of the injection well pipe 2 extends into the leachate section, and the top of the injection well pipe 2 extends out of the ground. A plurality of injection branches 21 are arranged in the injection well pipe 2. Figure 1 As shown, in this embodiment, the injection pipes 21 include a first injection pipe, a second injection pipe, and a third injection pipe. These three injection pipes 21 extend to different depths. Each of the three injection pipes 21 is connected to a main injection pipe 27 located above the ground. This main injection pipe 27 is connected to a liquid storage tank 26 containing a repair agent or water. The main injection pipe 27 is equipped with an injection pump 25 and an injection control valve 24. Each injection pipe 21 is provided with a nozzle 22 at its bottom.

[0025] In the liquid injection remediation unit, the length of the injection well pipe 2 is determined based on the characteristics of the contaminants and the thickness of the contaminated layer. The liquid injection remediation unit is used for leachate and soil remediation. Activating the injection pump 25 injects remediation agents or water into the main injection pipe 27. The liquid is then transported through three branch injection pipes 21 and ultimately sprayed into the injection well pipe 2 through a nozzle 22.

[0026] The gas injection repair unit includes a gas injection well pipe 4, a gas injection pipe 44, a gas injection control valve 45, gas injection equipment (not shown), an extraction pipe 46, an extraction control valve 48, and an extraction equipment (not shown).

[0027] The top of the gas injection well pipe 4 extends out of the ground and is closed. A plurality of gas injection channels 41 are provided in the gas injection well pipe 4 from top to bottom. The gas injection channels 41 adopt a porous structure, which plays a role in achieving layered gas injection and uniform gas distribution. The top of the gas injection well pipe 4 is connected to a gas injection pipe 44, which is connected to the gas injection equipment, and a gas injection control valve 45 is provided on the gas injection pipe 44. The side of the gas injection well pipe 4 is connected to an extraction pipe 46, which is connected to the extraction equipment, and an extraction control valve 48 and a pressure gauge 47 are provided on the extraction pipe 46. An exhaust hole 43 is also provided at the top of the gas injection well pipe 4.

[0028] The gas injection remediation unit is used to provide oxygen or air, to provide a suitable growth environment for aerobic microorganisms in the soil, and to accelerate the biodegradation of organic pollutants in the soil. By opening the gas injection control valve 45, the gas injection pipe 44 can be used to deliver oxygen. By opening the extraction control valve 48, the extraction pipe 46 can be evacuated. If the extraction control valve 48 is closed and the gas injection control valve 45 is opened, fresh air or oxygen can be injected into the gas injection pipe 44 to provide a suitable growth environment for aerobic microorganisms in the soil, and to accelerate the biodegradation of organic pollutants in the soil. If the extraction control valve 48 is opened and the gas injection control valve 45 is closed, the landfill gas in the garbage layer can be extracted, and the air exchange is completed through the gas injection and extraction cycle control, thereby improving the remediation effect of the in-situ remediation well of the utility model.

[0029] The detection unit can detect multiple parameters such as temperature, humidity, water quality, etc. as needed. The detection unit includes a sensor and a display instrument. A plurality of sensor probe installation sites are also provided in the filling filter layer for installing one or more sensors such as temperature sensors, humidity sensors, water quality detection sensors (such as pH detection digital sensors). Reference numeral 3 in the figure represents a sensor. The sensor is installed in the filling filter layer, and the data transmission line of the sensor extends out of the repair well 1. The display instrument can use an existing plug-in instrument. When the staff needs to view the detection data of the sensor, the plug of the sensor data transmission line can be plugged into the socket of the display instrument. The staff can view the sensor detection data from the display instrument. After viewing, the sensor and the display instrument are disconnected and the display instrument is taken away. This temporary plug-in method can protect the instrument and prevent the display instrument from being exposed to the environment for a long time and corroded.

[0030] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. An in-situ integrated remediation well in an informal landfill, characterized by: include: Repair wells, liquid injection repair units, gas injection repair units, The repair well is arranged perpendicular to the ground plane, the lower end of the repair well extends below the aquifer in the contaminated area, and the upper end of the repair well extends to the ground; The injection repair unit includes an injection well pipe arranged in the repair well, the bottom of the injection well pipe extends to the leachate section, and the top of the injection well pipe extends out of the ground; The injection well pipe is provided with a plurality of injection branch pipes at different depths, all of which are connected to the injection main pipe located above the ground, which is connected to the liquid storage tank, and is provided with an injection pump and an injection control valve; The gas injection repair unit includes a gas injection well pipe arranged in the repair well, the top of the gas injection well pipe protruding from the ground and being closed; The top of the gas injection well pipe is connected to a gas injection pipe, the gas injection pipe is connected to the gas injection equipment, and a gas injection control valve is provided on the gas injection pipe; An extraction pipe is connected to the side of the gas injection well pipe, the extraction pipe is connected to the extraction equipment, and an extraction control valve is provided on the extraction pipe; A filter material layer is filled between the liquid injection well pipe, the gas injection well pipe and the repair well.

2. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The filling filter material layer is also provided with a plurality of sensor probe installation sites for installing one or more of a temperature sensor, a humidity sensor, and a water quality detection sensor.

3. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The filling filter material layer consists of an upper bentonite layer and a lower crushed stone layer.

4. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The bottom of each liquid injection branch pipe is provided with a nozzle.

5. The in-situ integrated remediation well of an informal landfill as claimed in claim 4, characterized in that: in, The liquid injection branch pipe includes a first liquid injection branch pipe, a second liquid injection branch pipe, and a third liquid injection branch pipe.

6. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, A plurality of gas injection channels are arranged in the gas injection well pipe from top to bottom.

7. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The extraction tube is provided with a pressure gauge.

8. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, An exhaust hole is provided on the top of the gas injection well pipe.

9. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The portion of the upper end of the repair well extending to the ground is provided with a well cap.

10. The in-situ integrated remediation well of an informal landfill as claimed in claim 1, characterized in that: in, The bottoms of the liquid injection well pipe and the gas injection well pipe are respectively provided with well plugs.

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