Landfill comprehensive treatment and soil ecological environment restoration method

Abstract

The invention discloses a landfill comprehensive treatment and soil ecological environment restoration method which comprises the following steps: S1, monitoring the temperature and humidity in a landfill, and introducing cold air or hot air into the landfill; s2, gas components in the landfill are monitored, gas pollutants in the landfill are pumped out through a vacuum pump, after gas-water separation, gas is treated and discharged after reaching the standard, and water is recycled; s3, liquid components in the landfill are monitored, liquid pollutants in the landfill are pumped out through a vacuum pump, and water is recycled after being treated to reach the standard; and S4, the recycled water in the S2 and the S3 is collected, a water source is communicated, a medicament is added, and liquid medicine is introduced into the landfill. According to the method, the environmental conditions of the landfill can be regulated and controlled, the garbage in the landfill is degraded in an accelerated manner, the stabilization period is shortened, pollutants such as ammonia nitrogen and humus released in the accelerated degradation process of the garbage are effectively controlled, and pollution to soil is reduced through remediation and treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive management of landfills, and more specifically, to a method for comprehensive management of landfills and restoration of soil ecological environment. Background Art

[0002] Landfills are a "carbon reservoir" in cities and have become an important part of urban carbon cycles. At present, the comprehensive management technologies of landfills mainly include in-situ closure, screening and comprehensive utilization, relocation, aerobic stabilization, etc. Aerobic stabilization management technology regards the landfill as a large aerobic bioreactor, artificially establishes an environment suitable for the growth of microorganisms, and causes aerobic biodegradation in the landfill, fundamentally reducing pollutants and achieving stabilization. After the landfill is aerobic stabilized, the biodegradable components in the garbage are basically degraded, various monitoring indicators tend to be stable, and the settlement of the garbage layer meets the requirements. According to the "Technical Requirements and Specifications for the Utilization of Stabilized Sites of Domestic Waste Landfills" issued by the Ministry of Housing and Urban-Rural Development, land vegetation restoration and site utilization can be carried out. The problem with traditional aerobic stabilization of landfills is that there is no mature process line and management equipment system, resulting in a long cycle and certain soil pollution. Therefore, this application urgently needs to solve the above technical problems, provide a method for comprehensive management of landfills and restoration of soil ecological environment, shorten the stabilization cycle, and reduce soil pollution by improving restoration and management. Summary of the invention

[0003] The present invention provides a method for comprehensive management of landfills and restoration of the soil ecological environment, which can regulate the environmental conditions of the landfill, accelerate the degradation of garbage in the landfill, shorten the stabilization period, effectively control pollutants such as ammonia nitrogen and humus released during the accelerated degradation of garbage, and reduce soil pollution through restoration and management.

[0004] In order to achieve these purposes and other advantages according to the present invention, a method for comprehensive management of landfills and restoration of soil ecological environment is provided, comprising the following steps: S1: Monitor the temperature and humidity inside the landfill and introduce cold or hot air into the landfill; S2: Monitor the gas composition inside the landfill, extract the gas pollutants inside the landfill through a vacuum pump, separate the gas and water, and discharge the gas after treatment to meet the standards, and recycle the water; S3: Monitor the liquid composition inside the landfill, extract the liquid pollutants inside the landfill through a vacuum pump, and recycle the water after it meets the standards; S4: Collect the recycled water from S2 and S3, connect to the water source if necessary, add chemicals, and pass the chemical solution into the landfill.

[0005] Preferably, the landfill is provided with an in-field main pipeline and an in-field branch pipeline, the in-field main pipeline is vertically arranged in the deep layer of the landfill, the in-field main pipeline is provided with the vacuum pump, the in-field branch pipelines are distributed on the outer periphery of the in-field main pipeline, the in-field branch pipelines are provided with penetration holes and screens, the upper end of the in-field main pipeline is provided with a 1# three-way valve, and the two ends of the 1# three-way valve are respectively provided with a 2# three-way valve and a 3# three-way valve; In S1, the introduction of cold air or hot air into the landfill is achieved by respectively setting up a cold air duct and a hot air duct, both of which are connected to the air intake pipe. In S4, the introduction of liquid medicine into the landfill is achieved by setting up a ground liquid storage tank, the inlet of which includes a medicine inlet, a water source inlet, and a recycled water inlet. The outlet of the ground liquid storage tank is connected to the medicine inlet pipe, and the outlets of the air intake pipe and the medicine inlet pipe are respectively connected to the remaining two ends of the 2# three-way valve; In S2, gaseous pollutants inside the landfill are extracted and connected to a gas-water separation mechanism. In S3, liquid pollutants inside the landfill are extracted and connected to a sewage treatment mechanism. The inlets of the gas-water separation mechanism and the sewage treatment mechanism are respectively connected to the remaining two ends of the 3# three-way valve.

[0006] Preferably, the gas-water separation mechanism is connected to the gas purifier and the first rotary pump respectively. After the gaseous pollutants are separated from the gas and water, the gas is discharged into the atmosphere through the gas purifier, and the water is recovered to the recovery tank through the first rotary pump. The sewage treatment mechanism is connected to the recovery tank through the second rotary pump, and the outlet of the recovery tank is connected to the recovery water inlet of the ground liquid storage tank through the third rotary pump.

[0007] Preferably, S4 further comprises: collecting groundwater, adding reagents, and introducing liquid medicine into the landfill, wherein the introduction of liquid medicine into the landfill in S4 is achieved by setting up an underground liquid storage tank; There are also off-site main pipelines and off-site branch pipelines outside the landfill. The off-site main pipeline is vertically arranged in the deep layer outside the landfill. The off-site branch pipelines are distributed on the outer periphery of the same side of the off-site main pipeline. The off-site branch pipelines are provided with penetration holes and screens. The ground liquid storage tank is also provided with a groundwater connecting port. The upper end of the off-site main pipeline is connected to the groundwater connecting port of the ground liquid storage tank, and the lower end of the off-site main pipeline is connected to the underground liquid storage tank, and the underground liquid storage tank is also connected to the main pipeline inside the site.

[0008] Preferably, the off-site branch pipeline includes a first branch pipeline and a second branch pipeline, the first branch pipeline is horizontally arranged, the second branch pipeline is inclined downward, and the two ends of the second branch pipeline are respectively connected to the middle of the first branch pipeline and the off-site main pipeline.

[0009] Preferably, a plurality of cross beams are provided inside the off-site main pipeline, and the heights of the plurality of cross beams correspond to a plurality of first branch pipelines. The ends of the cross beams are connected to rotating shafts through bearings, and the plurality of rotating shafts are chain-driven and rotate at the same frequency under the drive of a motor. The rotating shaft fixing sleeve is provided with a first rotating rod, and the first rotating rod and the second rotating rod are hinged. The first branch pipeline is provided with a piston, and the back of the piston is hinged to the second rotating rod. The lengths of the first rotating rod and the second rotating rod are set so that when the second rotating rod is rotated to be unfolded in a straight line with the first rotating rod, the piston is translated to close the through hole and the second branch pipeline of the first branch pipeline, and when the second rotating rod is rotated to be folded in a straight line with the first rotating rod, the piston is translated to connect the through hole and the second branch pipeline of the first branch pipeline.

[0010] The present invention has at least the following beneficial effects: First, the present invention adjusts the temperature and humidity of garbage in the landfill, collects and extracts gaseous pollutants, and collects leachate, so that the landfill is in suitable oxygen content, temperature and humidity conditions, improves the growth environment of microbial flora, allows aerobic biodegradation to occur in the landfill, shortens the stabilization period, effectively controls pollutants such as ammonia nitrogen and humus released during the accelerated degradation of garbage, and reduces soil pollution through restoration and management.

[0011] Second, landfills are relatively closed spaces. Aerobic reactions after garbage landfill make the internal temperature high. By introducing cold air, the ambient temperature can be lowered to avoid high-temperature inactivation of microorganisms. Similarly, when the ambient temperature is too low, hot air can be introduced to increase the ambient temperature to avoid affecting the activity of microorganisms and achieve controllable temperature and humidity. By extracting gaseous pollutants, the heat generated by aerobic reactions can be taken out, and gas-liquid separation can be achieved. Part of the water can be collected, and the impact of harmful substances in the garbage on the soil can be reduced by extracting liquid pollutants, namely leachate. The treated water is collected and re-injected, which can provide bacteria inside the landfill and synergistically degrade with the bacteria applied in the agent. In particular, it has a good adsorption and degradation effect on pollutants such as ammonia nitrogen and humus. After treatment by this method, they can be stabilized and rendered harmless.

[0012] Thirdly, an internal main pipeline is set inside the landfill to extend into the deep layer, and the internal branch pipelines are distributed on the periphery of the internal main pipeline to form a fluid interaction space between the inside and the outside. When cold air or hot air is introduced, it is injected into the deep layer of the landfill through the air inlet pipeline, the internal main pipeline, and the internal branch pipeline through the through hole. When liquid medicine is introduced, it is injected into the deep layer of the landfill through the liquid inlet pipeline, the internal main pipeline, and the internal branch pipeline through the through hole. A vacuum pump is set up to provide power to discharge gaseous and liquid pollutants in the deep layer. When gaseous pollutants are extracted, they enter through the through hole and are discharged through the internal branch pipeline, the internal main pipeline, and the gas-water separation mechanism. When liquid pollutants are extracted, they enter through the through hole and are discharged through the internal separation mechanism. The wastewater is discharged after the branch pipeline, the main pipeline in the field, and the sewage treatment mechanism. The 1# three-way valve realizes the overall control of the main pipeline in the field, realizes the air intake and liquid intake, exhaust and liquid discharge, the 2# three-way valve realizes the air intake or liquid intake, and the 3# three-way valve realizes the exhaust or liquid discharge. The cold air pipe and the hot air pipe can use heat exchange equipment, such as condensers and evaporators. The gas-water separation mechanism can use a multi-stage gas-water separator. The sewage treatment mechanism can use a membrane-bioreactor. The ground liquid storage tank is injected into the landfill by applying agents, such as aerobic bacteria, degradation enzymes, and nutrient elements, to supplement the microbial flora and accelerate the degradation of the garbage in the landfill. After treatment by this method, the degradation efficiency can be improved and the pollution of pollutants to the soil can be reduced. The recycled water treated by the gas-water separation mechanism and the recycled water treated by the sewage treatment mechanism can be passed into the recycling box. The recycled water in the recycling box still has a certain flora. Passing into the ground liquid storage tank can achieve the mixing of the microbial flora and further improve the degradation ability of the microbial flora.

[0013] Fourth, when the water in the landfill infiltrates into the ground, it will inevitably pollute the groundwater. By setting up off-site main pipes and off-site branch pipes to repair the groundwater, the soil can be repaired from the source and pollution can be reduced. The off-site main pipes are distributed in the deep layer outside the landfill and extend from top to bottom, and the off-site branch pipes are distributed on the same side, preferably on the side away from the off-site main pipe, so as to form a fluid interaction space between the inside and the outside. The groundwater enters through the permeation hole, and enters the underground liquid storage tank through the off-site branch pipe and the off-site main pipe. Agents, such as aerobic bacteria, degrading enzymes, and nutrients, are applied through the groundwater connecting port of the ground liquid storage tank. The agents are extracted from the underground liquid storage tank through a vacuum pump, and then injected into the deep layer of the landfill through the permeation hole through the on-site main pipe and the on-site branch pipe to supplement the microbial flora. After treatment by this method, groundwater can be recovered and in-situ repair can be carried out to reduce the pollution of pollutants in groundwater to the soil.

[0014] Fifth, the off-site branch pipeline is designed to be a horizontal first branch pipeline and an inclined second branch pipeline, so that groundwater can flow into the off-site main pipeline from the inclined second branch pipeline. In order to quickly collect groundwater, it is impossible to achieve a qualitatively changed technical effect by simply relying on the flow rate of automatic infiltration. A piston is set in the first branch pipeline so that the air pressure when the piston is pulled out can quickly draw the groundwater into the first branch pipeline. The power for pulling the piston out is achieved by a piston power assembly formed by a motor, a crossbeam, a rotating shaft, a first rotating rod, and a second rotating rod. The motor drives the rotating shaft to rotate, and the rotating shaft drives the first rotating rod to rotate. The first rotating rod makes a circular periodic motion with the rotating shaft as the center, driving the second rotating rod to swing, and then drives the piston to move back and forth along the first branch pipeline. The opening position of the second branch pipeline matches the path of the piston, that is, When the first rotating rod and the second rotating rod are at 180°, the piston has the longest stroke, closing the entrance of the second branch pipe, and the first branch pipe and the second branch pipe are not connected. When the first rotating rod and the second rotating rod are at 0°, the piston has the shortest stroke, exposing the entrance of the second branch pipe, and the groundwater enters the off-site main pipe through the second branch pipe. The various rotating shafts are driven by chains to achieve synchronous movement of the various rotating shafts. The rotating shafts are connected to the crossbeams through bearings, for example, the crossbeams are connected to the journals of the inner rings, and the rotating shafts are connected to the journals of the outer rings. Through this method, the groundwater is quickly and massively collected into the underground liquid storage tank, and then the groundwater is repaired and managed. This method can either pass through a ground liquid storage tank through a liquid inlet pipe, an on-site main pipe, an on-site branch pipe, and then enter the deep layer of the landfill through a through hole; or it can extract from an underground liquid storage tank through a vacuum pump (the ground liquid storage tank is injected with reagents in advance), and then pass through the on-site main pipe, the on-site branch pipe, and then enter the deep layer of the landfill through a through hole and inject into the landfill. It can not only supply water from a water source, but also collect and supply recycled water and groundwater, fundamentally reducing pollutants, and has the advantages of short degradation time, low leachate production, and low greenhouse gas emissions, which accelerates the degradation of garbage in the landfill and minimizes the impact of harmful substances in the garbage on the soil.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a technical solution of the present invention; Figure 2 It is a schematic diagram of the structure of the through holes of the on-site branch pipeline and the off-site branch pipeline of the present invention; Figure 3 It is a schematic structural diagram of the piston power assembly of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0020] like Figure 1~2 As shown, the present invention provides a method for comprehensive management of landfills and restoration of soil ecological environment, comprising the following steps: S1: monitor the temperature and humidity inside the landfill 1, and introduce cold air or hot air into the landfill 1; S2: monitor the gas composition inside the landfill 1, extract the gas pollutants inside the landfill 1 through the vacuum pump 4, separate the gas and water, and discharge the gas after it meets the standards, and recycle the water; S3: monitor the liquid composition inside the landfill 1, extract the liquid pollutants inside the landfill 1 through the vacuum pump 4, and recycle the water after it is treated to meet the standards; S4: Collect the recycled water from S2 and S3, connect it to the water source, add chemicals, and pass the chemical solution into the landfill 1.

[0021] In the above technical scheme, the present invention adjusts the temperature and humidity of garbage in the landfill 1, collects and extracts gaseous pollutants, and collects leachate, so that the landfill 1 is in suitable oxygen content, temperature and humidity conditions, improves the growth environment of microbial flora, causes aerobic biodegradation in the landfill 1, shortens the stabilization period, effectively controls pollutants such as ammonia nitrogen and humus released during the accelerated degradation of garbage, and reduces soil pollution through restoration and management.

[0022] Landfill 1 is a relatively closed space. Aerobic reaction after garbage landfill makes the internal temperature high. By introducing cold air, the ambient temperature can be lowered to avoid high-temperature inactivation of microorganisms. Similarly, when the ambient temperature is too low, the ambient temperature can be raised by introducing hot air to avoid affecting the activity of microorganisms and achieve controllable temperature and humidity. By extracting gaseous pollutants, the heat generated by the aerobic reaction can be taken out, and gas-liquid separation can be achieved. Part of the water can be collected, and the impact of harmful substances in the garbage on the soil can be reduced by extracting liquid pollutants, namely, leachate. The treated water is collected and re-injected, which can provide the bacteria inside the landfill 1 for synergistic degradation with the bacteria applied in the agent, especially for pollutants such as ammonia nitrogen and humus. It has a good adsorption and degradation effect, and can be stabilized and harmless after treatment by this method.

[0023] In another technical solution, an in-field main pipeline 2 and an in-field branch pipeline 3 are provided inside the landfill 1. The in-field main pipeline 2 is vertically arranged in the deep layer of the landfill 1. The in-field main pipeline 2 is provided with the vacuum pump 4. The in-field branch pipelines 3 are distributed on the outer periphery of the in-field main pipeline 2. The in-field branch pipelines 3 are provided with penetration holes 5 and screens. A 1# three-way valve 6 is provided at the upper end of the in-field main pipeline 2. Two ends of the 1# three-way valve 6 are also provided with 2# three-way valves 7 and 3# three-way valves 8 respectively. In S1, the introduction of cold air or hot air into the landfill 1 is achieved by respectively setting a cold air pipe and a hot air pipe, both of which are connected to the air inlet pipe. In S4, the introduction of liquid medicine into the landfill 1 is achieved by setting a ground liquid storage tank 11, the inlet of the ground liquid storage tank 11 includes a medicine inlet, a water source inlet, and a recycled water inlet, the outlet of the ground liquid storage tank 11 is connected to the medicine inlet pipe, and the outlet of the air inlet pipe and the outlet of the medicine inlet pipe are respectively connected to the remaining two ends of the 2# three-way valve 7; In S2, the gaseous pollutants inside the landfill 1 are extracted and connected to the gas-water separation mechanism 12. In S3, the liquid pollutants inside the landfill 1 are extracted and connected to the sewage treatment mechanism 14. The inlets of the gas-water separation mechanism 12 and the sewage treatment mechanism 14 are respectively connected to the remaining two ends of the 3# three-way valve 8.

[0024] In the above technical scheme, an in-field main pipeline 2 is arranged inside the landfill 1 and extends into the deep layer of the landfill 1. In-field branch pipelines 3 are distributed on the outer periphery of the in-field main pipeline 2 to form a fluid interaction space between the inside and the outside. When cold air or hot air is introduced, it is injected into the deep layer of the landfill 1 through the air intake pipeline, the in-field main pipeline 2, the in-field branch pipeline 3 and then through the through hole 5 of the in-field branch pipeline 3. When liquid medicine is introduced, it is injected into the deep layer of the landfill 1 through the liquid intake pipeline, the in-field main pipeline 2, the in-field branch pipeline 3 and then through the through hole 5 of the in-field branch pipeline 3. A vacuum pump 4 is arranged to provide power to discharge gaseous pollutants and liquid pollutants in the deep layer. When gaseous pollutants are extracted, they enter through the through hole 5 of the in-field branch pipeline 3 and are discharged after passing through the in-field branch pipeline 3, the in-field main pipeline 2 and the gas-water separation mechanism 12. When liquid pollutants are extracted, The wastewater enters through the through hole 5 of the branch pipe 3 in the field, passes through the branch pipe 3 in the field, the main pipe 2 in the field, and is discharged after the sewage treatment mechanism 14. The 1# three-way valve 6 realizes the overall control of the main pipe 2 in the field, realizes the air intake and liquid intake, exhaust and liquid discharge, the 2# three-way valve 7 realizes the air intake or liquid intake, and the 3# three-way valve 8 realizes the exhaust or liquid discharge. The cold air pipe and the hot air pipe can use heat exchange equipment, such as a condenser and an evaporator. The gas-water separation mechanism 12 can use a multi-stage gas-water separator. The sewage treatment mechanism 14 can use a membrane-bioreactor. The ground liquid storage tank 11 applies agents, such as aerobic bacteria, degradation enzymes, nutrients, etc., which are injected into the landfill 1 from the ground liquid storage tank 11 to supplement the microbial flora and accelerate the degradation of the garbage in the landfill 1. After being treated by this method, the degradation efficiency can be improved and the pollution of pollutants to the soil can be reduced.

[0025] In another technical solution, the gas-water separation mechanism 12 is connected to the gas purifier 13 and the first rotary pump 15 respectively. After the gas pollutants are separated from the gas and water, the gas is discharged to the atmosphere through the gas purifier 13, and the water is recovered to the recovery tank 18 through the first rotary pump 15. The sewage treatment mechanism 14 is connected to the recovery tank 18 through the second rotary pump 16, and the outlet of the recovery tank 18 is connected to the recovered water inlet of the ground liquid storage tank 11 through the third rotary pump 17. The recovered water treated by the gas-water separation mechanism 12 and the recovered water treated by the sewage treatment mechanism 14 can be passed into the recovery tank 18. The recovered water in the recovery tank 18 still has a certain bacterial flora. When it is passed into the ground liquid storage tank 11, the mixing of the microbial flora can be achieved, and the degradation ability of the microbial flora can be further improved.

[0026] In another technical solution, S4 further includes: collecting groundwater, adding reagents, and passing liquid medicine into the landfill 1. Passing liquid medicine into the landfill 1 in S4 is achieved by setting up an underground liquid storage tank 22; An off-site main pipeline 19 and an off-site branch pipeline are also provided outside the landfill 1. The off-site main pipeline 19 is vertically arranged in the deep layer outside the landfill 1, and the off-site branch pipelines are distributed on the same side of the off-site main pipeline 19. The off-site branch pipelines are provided with penetration holes 5 and screens. The ground liquid storage tank 11 is also provided with a groundwater connecting port. The upper end of the off-site main pipeline 19 is connected to the groundwater connecting port of the ground liquid storage tank 11, and the lower end of the off-site main pipeline 19 is connected to the underground liquid storage tank 22, and the underground liquid storage tank 22 is also connected to the on-site main pipeline 2.

[0027] In the above technical scheme, when the water in the landfill 1 infiltrates into the ground, it will inevitably pollute the groundwater. By setting up an off-site main pipeline 19 and an off-site branch pipeline to repair the groundwater, the soil can be repaired from the source and pollution can be reduced. The off-site main pipeline 19 is distributed in the deep layer outside the landfill 1 and extends from top to bottom, and the off-site branch pipes are distributed on the same side, preferably on the side away from the off-site main pipeline 19, so as to form a fluid interaction space between the inside and the outside. The groundwater enters through the penetration hole 5 of the off-site branch pipeline, and enters the underground liquid storage tank 22 through the off-site branch pipeline and the off-site main pipeline 19. Agents, such as aerobic bacteria, degradative enzymes, nutrients, etc., are applied through the groundwater connecting port of the ground liquid storage tank 11. The agents are extracted from the underground liquid storage tank 22 through the vacuum pump 4, and then injected into the deep layer of the landfill 1 through the penetration hole 5 of the on-site main pipeline 2 and the on-site branch pipeline 3 to supplement the microbial flora. After being treated by this method, the groundwater can be recovered and in-situ repair can be carried out to reduce the pollution of pollutants in the groundwater to the soil.

[0028] In another technical solution, Figure 3 As shown, the off-site branch pipeline includes a first branch pipeline 20 and a second branch pipeline 21. The first branch pipeline 20 is arranged horizontally, and the second branch pipeline 21 is arranged obliquely downward. The two ends of the second branch pipeline 21 are respectively connected with the middle of the first branch pipeline 20 and the off-site main pipeline 19. The off-site branch pipeline is designed as a horizontal first branch pipeline 20 and an inclined second branch pipeline 21. The through hole 5 of the off-site branch pipeline is arranged in the first branch pipeline 20, so that groundwater can flow from the inclined second branch pipeline 21 into the off-site main pipeline 19.

[0029] In another technical solution, a plurality of cross beams are provided inside the off-site main pipeline 19, and the heights of the plurality of cross beams correspond to a plurality of first branch pipelines 20. The ends of the cross beams are connected to rotating shafts through bearings, and the plurality of rotating shafts are chain-driven and rotate at the same frequency under the drive of a motor. The rotating shaft fixing sleeve is provided with a first rotating rod 23, and the first rotating rod 23 and the second rotating rod 10 are hinged. The first branch pipeline 20 is provided with a piston 9, and the back of the piston 9 is hinged to the second rotating rod 10. The lengths of the first rotating rod 23 and the second rotating rod 10 are set such that when the second rotating rod 10 is rotated to be unfolded in a straight line with the first rotating rod 23, the piston 9 is translated to close the through hole 5 and the second branch pipeline 21 of the first branch pipeline 20, and when the second rotating rod 10 is rotated to be folded in a straight line with the first rotating rod 23, the piston 9 is translated to connect the through hole 5 and the second branch pipeline 21 of the first branch pipeline 20.

[0030] In the above technical scheme, in order to quickly collect groundwater, it is impossible to achieve a qualitative technical effect by simply relying on the flow rate of automatic infiltration. By setting a piston 9 in the first branch pipe 20, the air pressure when the piston 9 is pulled out can quickly draw the groundwater into the first branch pipe 20. The power for pulling out the piston 9 is realized by the piston 9 power assembly formed by the motor, beam, shaft, first rotating rod 23, and second rotating rod 10. The motor drives the shaft to rotate, and the shaft drives the first rotating rod 23 to rotate. The first rotating rod 23 makes a circular periodic motion with the shaft as the center, driving the second rotating rod 10 to swing, thereby driving the piston 9 to move back and forth along the first branch pipe 20. The opening position of the second branch pipe 21 cooperates with the piston 9. The path is that when the first rotating rod 23 and the second rotating rod 10 are 180°, the stroke of the piston 9 is the farthest, closing the entrance of the second branch pipe 21, and the first branch pipe 20 and the second branch pipe 21 are not connected. When the first rotating rod 23 and the second rotating rod 10 are 0°, the stroke of the piston 9 is the shortest, exposing the entrance of the second branch pipe 21, and the groundwater enters the off-site main pipe 19 through the second branch pipe 21. The various rotating shafts are driven by chains to achieve synchronous movement of the various rotating shafts. The rotating shafts are connected to the crossbeams through bearings. For example, the crossbeams are connected to the journals of the inner rings, and the rotating shafts are connected to the journals of the outer rings. Through this method, the groundwater is quickly and massively collected into the underground liquid storage tank 22, and then the groundwater is repaired and managed.

[0031] This method can either pass through the ground liquid storage tank 11 through the liquid inlet pipe, the on-site main pipe 2, the on-site branch pipe 3, and then enter the deep layer of the landfill 1 through the through hole 5 of the on-site branch pipe 3, or it can be extracted from the underground liquid storage tank 22 through the vacuum pump 4 (the ground liquid storage tank 11 is injected with reagents in advance), and then pass through the on-site main pipe 2, the on-site branch pipe 3, and then enter the deep layer of the landfill 1 through the through hole 5 of the on-site branch pipe 3 and inject into the landfill 1. Not only can water be supplied by water sources, but also recycled water and groundwater can be collected and supplied, which fundamentally reduces pollutants and has the advantages of short degradation time, low leachate production, and low greenhouse gas emissions, which accelerates the degradation of garbage in the landfill 1 and minimizes the impact of harmful substances in the garbage on the soil.

[0032] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0033] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for comprehensive management of landfills and restoration of soil ecological environment, characterized in that: The following steps are involved: S1: Monitor the temperature and humidity inside the landfill and introduce cold or hot air into the landfill; S2: Monitor the gas composition inside the landfill, extract the gas pollutants inside the landfill through a vacuum pump, separate the gas and water, treat the gas to meet the standards and then discharge it, and recycle the water; S3: Monitor the liquid composition inside the landfill, extract the liquid pollutants inside the landfill through a vacuum pump, and recycle the water after it meets the standards; S4: Collect the recycled water from S2 and S3, connect it to the water source, add chemicals, and pass the chemical solution into the landfill.

2. The method for comprehensive landfill management and soil ecological environment restoration according to claim 1, characterized in that: The landfill is provided with an in-field main pipeline and an in-field branch pipeline. The in-field main pipeline is vertically arranged in the deep layer of the landfill. The in-field main pipeline is provided with the vacuum pump. The in-field branch pipelines are distributed on the outer periphery of the in-field main pipeline. The in-field branch pipelines are provided with penetration holes and screens. The upper end of the in-field main pipeline is provided with a 1# three-way valve. The two ends of the 1# three-way valve are also provided with a 2# three-way valve and a 3# three-way valve respectively. In S1, the introduction of cold air or hot air into the landfill is achieved by respectively setting up a cold air duct and a hot air duct, both of which are connected to the air intake pipe. In S4, the introduction of liquid medicine into the landfill is achieved by setting up a ground liquid storage tank, the inlet of which includes a medicine inlet, a water source inlet, and a recycled water inlet. The outlet of the ground liquid storage tank is connected to the medicine inlet pipe, and the outlets of the air intake pipe and the medicine inlet pipe are respectively connected to the remaining two ends of the 2# three-way valve; In S2, gaseous pollutants inside the landfill are extracted and connected to a gas-water separation mechanism. In S3, liquid pollutants inside the landfill are extracted and connected to a sewage treatment mechanism. The inlets of the gas-water separation mechanism and the sewage treatment mechanism are respectively connected to the remaining two ends of the 3# three-way valve.

3. The method for comprehensive landfill management and soil ecological environment restoration according to claim 2, characterized in that: The gas-water separation mechanism is connected to the gas purifier and the first rotary pump respectively. After the gaseous pollutants are separated from the gas and water, the gas is discharged into the atmosphere through the gas purifier, and the water is recovered to the recovery tank through the first rotary pump. The sewage treatment mechanism is connected to the recovery tank through the second rotary pump, and the outlet of the recovery tank is connected to the recovery water inlet of the ground liquid storage tank through the third rotary pump.

4. The method for comprehensive landfill management and soil ecological environment restoration according to claim 3, characterized in that: S4 also includes: collecting groundwater, adding chemicals, and passing the chemical solution into the landfill. In S4, passing the chemical solution into the landfill is achieved by setting up an underground liquid storage tank. There are also off-site main pipelines and off-site branch pipelines outside the landfill. The off-site main pipeline is vertically arranged in the deep layer outside the landfill. The off-site branch pipelines are distributed on the outer periphery of the same side of the off-site main pipeline. The off-site branch pipelines are provided with penetration holes and screens. The ground liquid storage tank is also provided with a groundwater connecting port. The upper end of the off-site main pipeline is connected to the groundwater connecting port of the ground liquid storage tank, and the lower end of the off-site main pipeline is connected to the underground liquid storage tank, and the underground liquid storage tank is also connected to the main pipeline inside the site.

5. The method for comprehensive landfill management and soil ecological environment restoration according to claim 4, characterized in that: The off-site branch pipeline includes a first branch pipeline and a second branch pipeline. The first branch pipeline is horizontally arranged, and the second branch pipeline is inclined downward. Both ends of the second branch pipeline are respectively connected to the middle of the first branch pipeline and the off-site main pipeline.

6. The method for comprehensive landfill management and soil ecological environment restoration according to claim 5, characterized in that: A plurality of cross beams are arranged inside the off-site main pipeline, and the heights of the plurality of cross beams correspond to a plurality of first branch pipelines. The ends of the cross beams are connected to rotating shafts through bearings, and the plurality of rotating shafts are chain-driven and rotate at the same frequency under the drive of a motor. The rotating shaft fixing sleeve is provided with a first rotating rod, and the first rotating rod and the second rotating rod are hinged. The first branch pipeline is provided with a piston, and the back of the piston is hinged to the second rotating rod. The lengths of the first rotating rod and the second rotating rod are set so that when the second rotating rod is rotated to be unfolded in a straight line with the first rotating rod, the piston is translated to close the through hole and the second branch pipeline of the first branch pipeline, and when the second rotating rod is rotated to be folded in a straight line with the first rotating rod, the piston is translated to connect the through hole and the second branch pipeline of the first branch pipeline.

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