Rapid stabilization device for landfill

Abstract

The utility model relates to a garbage landfill rapid stabilizing device which comprises a vertical well pipe inserted into a garbage heap body, screen holes are formed in the side wall of the vertical well pipe, the bottom of the vertical well pipe is connected with a percolate return pipe, and the percolate return pipe is connected with a percolate extraction device. A liquid level detection device is arranged in the vertical well casing, and a percolate detection device is arranged close to the bottom of the vertical well casing; a gas collecting pipe is arranged on one side outside the vertical well pipe; a gas probe for detecting the concentration of hazardous gas in the garbage heap and a humidity detection device are arranged at the lower end of the gas collecting pipe; the upper end of the gas collecting pipe is connected with a gas extraction device and an inflating device; the leachate extraction device is connected with the temporary liquid storage tank; the gas extraction device is connected with the temporary gas storage tank; and the temporary liquid storage tank is also connected with a leachate spraying device. According to the utility model, the gas-liquid balance in the garbage heap is adjusted by extracting the leachate, extracting gas and spraying the leachate, so that the rapid and stable degradation in the garbage heap is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, specifically to a rapid stabilization device for landfill waste. Background Technology

[0002] In some areas, informal landfill sites for municipal solid waste exist, which not only occupy land resources but also pose risks of leachate leakage and spontaneous combustion / explosion of landfill gas. Aerobic accelerated stabilization technology can shorten the time required for waste stabilization. However, due to the inherent heterogeneity of the waste pile, the aerobic reaction is affected by the "heat-water-mechanical-biological-chemical" factors within the pile, resulting in insufficient degradation in different areas and an imbalance in heat and gas production. This leads to risks such as leachate outflow, excessive gas production in some areas, and overheating of the pile, affecting the process of the waste pile reaching the standards for rapid excavation and the reuse of storage capacity. Utility Model Content

[0003] To address the issues of significant differences in degradation levels and imbalances in heat and gas production across different areas of a landfill, this invention provides a rapid landfill stabilization device. By adjusting the gas-liquid balance within the landfill, it effectively solves the problems of insufficient and uneven degradation of waste, as well as uneven heat and gas production.

[0004] The technical objective of this utility model is achieved through the following technical solution:

[0005] A rapid landfill stabilization device includes:

[0006] A vertical well pipe is inserted into the garbage heap. The side wall of the vertical well pipe is provided with evenly distributed screen holes. The bottom of the vertical well pipe is connected to a leachate return pipe. One end of the leachate return pipe is connected to the bottom of the vertical well pipe, and the other end of the leachate return pipe is connected to a leachate extraction device.

[0007] A liquid level detection device for measuring the liquid level depth inside the vertical well pipe is installed near the upper end of the vertical well pipe, and a leachate detection device for measuring the leachate temperature is installed near the bottom of the vertical well pipe.

[0008] A gas collection pipe is also installed inside the garbage pile on the outside side of the vertical well pipe. The lower end of the gas collection pipe is close to the lower end of the vertical well pipe. A gas probe for detecting the concentration of hazardous gases inside the garbage pile and a humidity detection device for detecting the humidity of the garbage pile are installed at the lower end of the gas collection pipe. The upper end of the gas collection pipe is connected to a gas extraction device and an air filling device. Several air holes for gas extraction or air filling are evenly arranged on the side wall of the gas collection pipe.

[0009] The leachate extraction device is connected to a temporary storage tank, and the gas extraction device is connected to a temporary gas storage tank; the temporary storage tank is also connected to a leachate spraying device for spraying into the landfill.

[0010] Furthermore, the horizontal distance between the gas gathering pipe and the vertical well pipe is 0.5-1.5m.

[0011] Furthermore, the vertical well casing includes a solid pipe, a screen pipe, and a sedimentation pipe connected sequentially from top to bottom. The screen holes are evenly distributed on the screen pipe, a filter screen is installed at the bottom of the sedimentation pipe, and a leachate detection device is installed inside the sedimentation pipe and above the filter screen.

[0012] Furthermore, the sedimentation tube is funnel-shaped.

[0013] Furthermore, a cleaning pipe is installed inside the vertical well pipe. The cleaning pipe is inserted along the upper end of the vertical well pipe and extends to near the bottom of the vertical well pipe. Several nozzles are provided on the side wall of the cleaning pipe corresponding to the inner wall of the vertical well pipe. The nozzles are arranged at least in the area at the height of the screen pipe.

[0014] Furthermore, the cleaning pipe includes a central water supply pipe and an annular assembly. The central water supply pipe passes through the annular assembly, and the annular assembly has a cavity that communicates with the central water supply pipe. Several nozzles are installed on the annular assembly and communicate with the cavity of the annular assembly.

[0015] Furthermore, the ring assembly and the central water supply pipe are detachably connected.

[0016] Furthermore, the lower end of the gas gathering pipe is 0.1-0.2m lower than the lower end of the vertical well pipe.

[0017] Furthermore, the temporary liquid storage tank is also equipped with a leachate sampling port, and the temporary gas storage tank is also equipped with a gas sampling port.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The landfill rapid stabilization device of this utility model extracts leachate from the vertical well pipe through a leachate extraction device to prevent leachate from flowing out of the landfill; it also extracts gas from the landfill in a timely manner through a gas extraction device to prevent the concentration of dangerous gases from exceeding the standard. By adjusting the gas-liquid balance, it is conducive to the rapid and stable degradation of the landfill.

[0020] 2. This utility model can also spray the interior of the garbage pile through the leachate spraying device, thereby regulating the temperature and humidity inside the garbage pile and avoiding excessively high temperature and humidity in different areas, which could lead to incomplete local degradation.

[0021] 3. This utility model, through the setting of the cleaning pipe, can flush the screen hole area, avoiding screen hole blockage and affecting the flow of leachate into the vertical well pipe. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the rapid stabilization device for landfill in Embodiment 1 of this utility model.

[0023] Figure 2 This is a schematic diagram of the vertical well pipe structure in Embodiment 2 of this utility model.

[0024] Figure 3 This is a schematic diagram of a ring component in Embodiment 2 of this utility model.

[0025] Figure 4 This is a schematic diagram of another structure of the ring component in Embodiment 2 of this utility model.

[0026] In the picture:

[0027] 1. Vertical well casing; 2. Screen; 3. Leachate return pipe; 4. Leachate extraction device; 5. Liquid level detection device; 6. Leachate detection device; 7. Gas collection pipe; 8. Gas probe; 9. Gas extraction device; 10. Quartz sand; 11. Bentonite; 12. Temporary storage tank; 13. Temporary gas storage tank; 14. Leachate spraying device; 15. Solid pipe; 16. Screen pipe; 17. Sedimentation pipe; 18. Filter screen; 19. Nozzle; 20. Central water delivery pipe; 21. Ring assembly; 22. Slot; 23. Clip; 24. Hoses; 25. Casing; 26. Water distribution pipe; 27. Humidity detection device; 28. Water tank; 29. ​​Leachate sampling port; 30. Gas sampling port; 31. Liquid pump; 32. Gas filling device. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to specific embodiments:

[0029] Example 1

[0030] A rapid stabilization device for landfills, such as Figure 1 As shown, it includes:

[0031] A vertical well pipe 1 is inserted into the garbage heap. The side wall of the vertical well pipe 1 is provided with evenly distributed screen holes 2. The bottom of the vertical well pipe 1 is connected to a leachate return pipe 3. One end of the leachate return pipe 3 is connected to the bottom of the vertical well pipe 1, and the other end of the leachate return pipe 3 is connected to a leachate extraction device 4, such as a leachate pump.

[0032] Inside the vertical well pipe 1, near the upper end, a liquid level detection device 5 is installed to detect the liquid level depth inside the vertical well pipe. The liquid level detection device 5 is such as the BALLUFF S-BCS M12L liquid level sensor. Inside the vertical well pipe 1, near the bottom, a leachate detection device 6 is installed to detect the leachate temperature. The leachate detection device is such as the DS18b20 stainless steel waterproof temperature probe.

[0033] A gas collecting pipe 7 is installed inside the waste pile on the outer side of the vertical well pipe 1. The lower end of the gas collecting pipe 7 is close to the lower end of the vertical well pipe 1. A gas probe 8 for detecting the concentration of hazardous gases inside the waste pile and a humidity detection device 27 for detecting humidity inside the waste pile are installed at the lower end of the gas collecting pipe 7. The upper end of the gas collecting pipe 7 is connected to a gas extraction device 9 and an air filling device 32. Several air holes for gas extraction or air filling are evenly arranged on the side wall of the gas collecting pipe. The gas extraction device 9 is such as a vacuum pump. Common hazardous gases include methane, hydrogen sulfide, and carbon monoxide. The gas probe can be a five-in-one gas detector such as the GTYQ-ASD5360F, and the humidity detection device can be a VAISALA HUMICIP humidity sensor.

[0034] Preferably, the lower end of the gas collecting pipe 7 is 0.1-0.2m lower than the lower end of the vertical well pipe 1. In this embodiment, the lower end of the gas collecting pipe 7 is 0.2m lower than the lower end of the vertical well pipe 1.

[0035] In normal use, the space between the vertical well pipe 1 and the waste pile is filled with quartz sand 10 and bentonite 11. From top to bottom along the outside of the vertical well pipe 1, the layers are bentonite 11 and quartz sand 10. The wellhead of the vertical well pipe 1 is covered, and the upper end of the vertical well pipe extends outside the waste pile. Quartz sand 10 is mainly filled in the area of ​​the sieve holes 2. The particle size of quartz sand 10 is larger than the size of the sieve holes 2. The leachate generated in the waste pile is filtered by quartz sand 10 and bentonite 11 and then enters the vertical well pipe 1 through the sieve holes 2. When the liquid level detection device 5 detects that the liquid level in the vertical well pipe 1 has reached the set height, the leachate extraction device is started by the PLC control system to extract the leachate in the vertical well pipe 1 in a timely manner. When the leachate detection device 6 detects that the leachate temperature has reached the set temperature threshold, the leachate extraction device 4 is started by the PLC control system to extract the leachate.

[0036] Gas probe 8 is used to detect the concentration of hazardous gases in the waste pile. When the concentration of hazardous gases in the area where gas probe 8 is located reaches the set threshold, the gas extraction device 9 is controlled by the PLC control system to extract the gas in time.

[0037] Preferably, the leachate extraction device 4 is also connected to a temporary storage tank 12, and the gas extraction device 9 is connected to a temporary gas storage tank 13; the extracted leachate is stored in the temporary storage tank 12, and the extracted gas is temporarily stored in the temporary gas storage tank 13.

[0038] Preferably, the temporary storage tank 12 is also connected to a leachate spraying device 14 that sprays leachate into the waste pile. The leachate spraying device regulates temperature and humidity by spraying leachate into the waste pile based on temperature and humidity data collected by a leachate detection device and humidity detection device. When the temperature inside the waste pile is too high, the leachate stored in the temporary storage tank 12 is sprayed into the waste pile through the leachate spraying device 14 to cool it down. The leachate spraying device 14 adjusts the spraying on and off based on the temperature data collected by the leachate detection device 6. The leachate spraying device 14 is a pipeline system controlled by a PLC control system, which is equipped with a pump 31 to extract liquid from the temporary storage tank 12 for spraying. It should be noted that since the leachate spraying device 14 is located inside the waste pile, multiple spray pipes are required for water distribution during spraying.

[0039] The aeration device 32, such as a blower, more specifically an axial flow blower, activates the blower via a PLC control system when the humidity inside the waste pile exceeds a set threshold. The blower then injects air into the waste pile from the outside through the air collection pipe 7, which serves as an aeration pipe, to reduce the humidity inside the waste pile. Preferably, a one-way valve is also installed between the blower and the air collection pipe. The one-way valve opens when the blower starts and closes when the blower stops. It should be noted that the air collection pipe is primarily used for gas extraction and is only used as an aeration pipe when the humidity inside the waste pile is excessively high.

[0040] Preferably, the horizontal distance between the gas collecting pipe 7 and the vertical well pipe 1 is 0.5-1.5m, and the distance between the permeate spraying device 14 and the gas collecting pipe 7 is 5-10m.

[0041] Example 2

[0042] In this embodiment, as Figure 2 As shown, the vertical well pipe 1 includes a solid pipe 15, a screen pipe 16 and a sedimentation pipe 17 connected sequentially from top to bottom. The screen holes 2 are provided on the side wall of the screen pipe 16. The side walls of the solid pipe 15 and the sedimentation pipe 17 are not provided with screen holes. The bottom of the sedimentation pipe 17 is provided with a filter screen 18. The leachate detection device 6 is provided inside the sedimentation pipe 17 and above the filter screen 18.

[0043] Preferably, the sedimentation tube 17 is funnel-shaped, and the filter screen 18 is located at the bottom of the funnel.

[0044] Preferably, a cleaning pipe is also provided inside the vertical well pipe 1. The cleaning pipe is inserted along the upper end of the vertical well pipe 1 and extends to the bottom near the vertical well pipe. Several nozzles 19 are provided on the side wall of the cleaning pipe corresponding to the inner wall of the vertical well pipe. The nozzles 19 are arranged at least in the height area of ​​the screen pipe 16. The cleaning pipe can be connected to an external water tank, water pipe, etc. In this embodiment, the cleaning water supply is realized by connecting an external water tank 28. Water is supplied to the vertical well pipe 1 for flushing periodically through the cleaning pipe to avoid the screen holes 2 being blocked. The cleaning can be carried out by manually opening the pump. Water is drawn from the water tank 28 and sent to the cleaning pipe by a water pump. The flushing water will eventually be drawn out along with the leachate by the leachate return pipe 3.

[0045] Nozzle 19 can be a spray hole, a common water mist nozzle, etc.

[0046] More specifically, the cleaning pipe includes a central water supply pipe 20 and an annular assembly 21. The central water supply pipe 20 passes through the center of the annular assembly 21. The annular assembly 21 has a cavity that communicates with the central water supply pipe 20. Several nozzles 19 are installed on the annular assembly 21 and communicate with the cavity of the annular assembly 21.

[0047] In this embodiment, the leachate detection device 6 is installed at the bottom of the cleaning pipe, the bottom of the cleaning pipe is sealed, and the gas probe 8 is installed at the lower end of the gas collecting pipe 7.

[0048] Preferably, the annular component 21 and the central water supply pipe 20 are detachably connected, and the annular component 21 and the central water supply pipe 20 can be detached and reconnected by means of threaded joints, snaps, etc.

[0049] This embodiment provides a method for installing a ring-shaped component, such as... Figure 3 As shown, a groove 22 is provided around the outside of the central water supply pipe 20. A hole penetrating the side wall of the central water supply pipe 20 is provided in the groove 22. Several hoses 24 are provided in the inner ring of the annular component 21 corresponding to the groove 22. One end of the hose 24 is connected to the inside of the annular component, and the other end of the hose 24 is provided with a clamp 23 that matches the groove 22. The clamp 23 is provided with a water inlet corresponding to the hole in the side wall of the central water supply pipe 20. The water inlet is connected to the hose 24. During installation, the clamp 23 is inserted into the groove 22 so that the water inlet is aligned with the hole in the side wall of the central water supply pipe 20 to achieve connection. The number of nozzles can be increased by using the annular component, thereby improving the flushing effect.

[0050] This embodiment also provides an installation method for the ring-shaped component, such as... Figure 4As shown, the middle water supply pipe is spliced ​​by connecting internal threaded joints and external threaded joints. A sleeve 25 is provided inside the ring of the annular component 21. One end of the sleeve 25 is provided with an internal thread and the other end is provided with an external thread. The sleeve 25 is installed between the two middle water supply pipes 20 through threaded engagement. A water distribution pipe 26 is connected to the side wall of the sleeve 25. One end of the water distribution pipe 26 is connected to the inside of the sleeve 25 and the other end is connected to the internal cavity of the annular component 21.

[0051] Example 3

[0052] As a preferred option, such as Figure 1 As shown, the temporary storage tank 12 is also equipped with a leachate sampling port 29, and the temporary gas storage tank 13 is also equipped with a gas sampling port 30. The leachate sampling port 29 is a pipe opening on the temporary storage tank 12, with a threaded cap. During sampling, the cap is opened to extract leachate from the temporary storage tank for testing purposes. The gas sampling port 30 is a sampling pipe with a valve body, such as a gas shut-off valve. During sampling, the sampling container is connected to the sampling pipe, the gas shut-off valve is opened for gas sampling, and the gas shut-off valve is closed after sampling is completed.

[0053] The following table shows the various indicators for gas sampling and leachate sampling testing:

[0054]

[0055]

[0056] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make non-inventive modifications to this embodiment as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A rapid stabilization device for landfills, characterized in that, include: A vertical well pipe is inserted into the garbage heap. The side wall of the vertical well pipe is provided with evenly distributed screen holes. The bottom of the vertical well pipe is connected to a leachate return pipe. One end of the leachate return pipe is connected to the bottom of the vertical well pipe, and the other end of the leachate return pipe is connected to a leachate extraction device. A liquid level detection device for measuring the liquid level depth inside the vertical well pipe is also installed inside the vertical well pipe near the upper end of the vertical well pipe, and a leachate detection device for measuring the leachate temperature is also installed inside the vertical well pipe near the bottom of the vertical well pipe. A gas collecting pipe is also installed inside the garbage pile on one side of the vertical well pipe. The lower end of the gas collecting pipe is close to the lower end of the vertical well pipe. The lower end of the gas collecting pipe is equipped with a gas probe for detecting the concentration of hazardous gases inside the garbage pile and a humidity detection device for detecting the humidity of the garbage pile. The upper end of the gas collecting pipe is connected to a gas extraction device and a gas filling device. The side wall of the gas collecting pipe is evenly provided with a number of gas holes for gas extraction or filling. The leachate extraction device is connected to a temporary storage tank, and the gas extraction device is connected to a temporary gas storage tank; the temporary storage tank is also connected to a leachate spraying device for spraying into the waste pile.

2. The rapid stabilization device for landfills according to claim 1, characterized in that, The horizontal distance between the gas gathering pipe and the vertical well pipe is 0.5-1.5m.

3. The rapid stabilization device for landfills according to claim 1, characterized in that, The vertical well casing includes a solid pipe, a screen pipe, and a sedimentation pipe connected sequentially from top to bottom. The screen holes are evenly distributed on the screen pipe. A filter screen is installed at the bottom of the sedimentation pipe. The leachate detection device is installed inside the sedimentation pipe and above the filter screen.

4. The rapid stabilization device for landfills according to claim 3, characterized in that, The sedimentation tube is funnel-shaped.

5. The rapid stabilization device for landfills according to claim 3, characterized in that, A cleaning pipe is also installed inside the vertical well pipe. The cleaning pipe is inserted along the upper end of the vertical well pipe and extends to near the bottom of the vertical well pipe. Several nozzles are provided on the side wall of the cleaning pipe corresponding to the inner wall of the vertical well pipe. The nozzles are arranged at least in the height area of ​​the screen pipe.

6. The rapid stabilization device for landfills according to claim 5, characterized in that, The cleaning pipe includes a central water supply pipe and an annular assembly. The central water supply pipe passes through the annular assembly, and the annular assembly has a cavity that communicates with the central water supply pipe. Several nozzles are installed on the annular assembly and communicate with the cavity of the annular assembly.

7. The rapid stabilization device for landfills according to claim 6, characterized in that, The annular assembly and the central water supply pipe are detachably connected.

8. The rapid stabilization device for landfills according to claim 1, characterized in that, The lower end of the gas gathering pipe is 0.1-0.2m lower than the lower end of the vertical well pipe.

9. A rapid landfill stabilization device according to claim 1, characterized in that, The temporary liquid storage tank is also equipped with a leachate sampling port, and the temporary gas storage tank is also equipped with a gas sampling port.

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