A landfill gas pipeline drainage device

Abstract

The application provides a landfill gas pipeline drainage device for communicating with a landfill gas pipeline. The drainage device comprises a shell and a baffle. The shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are oppositely arranged. The baffle comprises a plurality of baffles and is fixed in parallel in the shell. The baffle comprises a windward surface and a leeward surface, the windward surface faces the air inlet, and the leeward surface faces the air outlet. The windward surface of the baffle is coated with a titanium dioxide composite silicon dioxide (TiO2-SiO2) coating; an ultraviolet light emitting device is installed on the side wall of the shell facing the windward surface, and the ultraviolet light emitting device is configured to emit ultraviolet light rays on the windward surface. The drainage device of the application can clean the drainage device and improve the efficiency of gas-liquid separation.

Description

Technical Field

[0001] This application relates to waste disposal, and more specifically, to a landfill gas pipeline drainage device. Background Technology

[0002] Landfills inevitably generate large amounts of landfill gas during their daily operation. This gas is formed through complex processes such as microbial decomposition of waste in the landfill, and its composition is quite complex, containing a significant amount of liquid. When landfill gas is transported through pipeline systems, the liquid components in the gas easily accumulate in low-lying areas, bends, valves, and other parts of the pipeline. Over time, this accumulated liquid will, on the one hand, continuously corrode the inner walls of the pipeline, gradually weakening the structural integrity and strength of the pipeline, increasing the risk of pipeline rupture and leakage, and thus causing a series of environmental and safety hazards, such as air quality deterioration caused by landfill gas leaks. On the other hand, the moisture accumulated in the pipeline will occupy space, hindering the normal flow of landfill gas, thereby increasing the resistance to gas transportation and reducing the efficiency of landfill gas transportation. Utility Model Content

[0003] This application provides a landfill gas pipeline drainage device that can clean the drainage device and improve the efficiency of gas-liquid separation.

[0004] Specifically, this application is implemented through the following technical solution: One aspect of this application provides a landfill gas pipeline drainage device for connection to a landfill gas pipeline, comprising: The housing has an air inlet and an air outlet, which are arranged opposite to each other; A plurality of partitions are fixed in parallel inside the housing. Each partition has a windward side and a leeward side, with the windward side facing the air inlet and the leeward side facing the air outlet. The windward side of the partition is coated with a titanium dioxide composite silicon dioxide coating. An ultraviolet light emitting device is installed on the side wall of the housing facing the windward side, and the ultraviolet light emitting device is configured to emit ultraviolet light that irradiates the windward side.

[0005] Optionally, the leeward side of the partition is coated with a graphite-phase carbon nitride / zinc oxide composite coating, and a visible light emitting device is installed on the side wall of the housing facing the leeward side, the visible light emitting device being configured to emit visible light that illuminates the leeward side.

[0006] Optionally, the direction from the air inlet to the air outlet is designated as the first direction, and along the first direction, the plurality of partitions are arranged alternately.

[0007] Optionally, the partition near the air inlet is a first partition, the partition near the air outlet is a second partition, and a first baffle is provided above the air inlet, the first baffle connecting the first partition and the side wall where the air inlet is located. A second baffle is provided below the air outlet, and the second baffle connects the second partition and the side wall where the air outlet is located.

[0008] Optionally, the top of the housing is hemispherical, with an ultraviolet light emitting device installed on the portion of the top near the air inlet, and a visible light emitting device installed on the portion of the top near the air outlet.

[0009] Optionally, the drainage device further includes a dual-source light emitting device, which includes an ultraviolet light emitting end and a visible light emitting end; The middle part of the shell is cylindrical, and multiple partitions are distributed in the middle part of the shell. An ultraviolet light emitting device is installed on the side wall where the air inlet is located, and a visible light emitting device is installed on the side wall where the air outlet is located. Among the multiple partitions, a dual light source emitting device is installed between two adjacent partitions, and the ultraviolet light emitting end faces the windward side of the partition, while the visible light emitting end faces the leeward side of the partition.

[0010] Optionally, the lower part of the housing is arc-shaped and has a drainage outlet, and the lower part of the housing is covered with a reflector.

[0011] Optionally, a pH sensor is provided at the bottom of the housing to detect the pH value of the discharged solution, and an inlet is also provided at the bottom of the housing to add an alkaline substance into the housing based on the pH value detected by the pH sensor.

[0012] This application discloses a landfill gas pipeline drainage device whose windward side of the partition is coated with a titanium dioxide composite silica (TiO2-SiO2) coating. An ultraviolet (UV) emitting device is installed on the side wall of the shell facing the windward side, and the emitted UV light is configured to irradiate the windward side. The TiO2-SiO2 coating on the windward side of the partition is a photocatalytic material. Under UV excitation, TiO2 generates highly oxidizing hydroxyl radicals and holes. These active oxides have extremely strong oxidizing power, capable of attacking the chemical bonds in tar molecules, decomposing them into small organic molecules, and ultimately converting them into harmless substances such as carbon dioxide and water. The addition of SiO2 increases the specific surface area and photogenerated carrier separation efficiency of TiO2, further enhancing the photocatalytic degradation of tar. This drainage device, while achieving gas-liquid separation drainage, can also remove accumulated tar impurities inside the drainage device, further improving the gas-liquid separation efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the interior of a drainage device shown in an exemplary embodiment of this application; Figure 2 This is a cross-sectional view of the partition shown in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the upper part of a drainage device shown in an exemplary embodiment of this application; Figure 4 This is a schematic diagram of the middle part of a drainage device shown in an exemplary embodiment of this application; Figure 5 This is a schematic diagram of the lower part of a drainage device shown in an exemplary embodiment of this application; Figure 6 This is a distribution diagram of the launching device on the upper part of the drainage device shown in an exemplary embodiment of this application.

[0014] Wherein: 100, shell; 200, partition; 210, first partition; 211, first baffle; 220, second partition; 221, second baffle; 110, air inlet; 120, air outlet; 130, drain outlet; 140, discharge outlet; 201, windward side; 202, leeward side; 310, ultraviolet light emitting device; 320, visible light emitting device; 330, dual light source emitting device; 400, reflector. Detailed Implementation

[0015] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0016] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0017] Combination Figure 1 and Figure 2This application provides a landfill gas pipeline drainage device for connecting to a landfill gas pipeline. The drainage device includes a housing 100 and partitions 200. The housing 100 has an air inlet 110 and an air outlet 120, which are arranged opposite to each other. Multiple partitions 200 are fixed parallel to each other inside the housing 100. Each partition 200 has a windward side 201 and a leeward side 202. The windward side 201 faces the air inlet 110, and the leeward side 202 faces the air outlet 120. Here, the partitions 200 can be directly opposite the air inlet or the air outlet, or they can be arranged at a certain angle relative to the air inlet or the air outlet. There is no limitation on this. When landfill gas enters the housing 100 through the inlet, it encounters the baffle 200. Due to inertia, the gas in the landfill gas is deflected, while the liquid component in the landfill gas, due to its greater inertia, adheres to the baffle 200 and then collects downwards to the lower part of the housing 100 due to gravity. Furthermore, the multiple baffles 200 provided in this application can extend the flow path of the landfill gas, giving liquid droplets in the gas more opportunities to collide with the baffles 200 and thus be separated, improving the efficiency of gas-liquid separation.

[0018] The windward side 201 of the baffle 200 is coated with a titanium dioxide composite silica (TiO2-SiO2) coating. An ultraviolet (UV) emitting device 310 is installed on the side wall of the housing 100 facing the windward side 201, and the UV emitting device 310 is configured to emit UV light that irradiates the windward side 201. During the generation of landfill gas, tar particles may be generated and mixed in the landfill gas due to incomplete degradation of organic matter, microbial metabolism, etc. In the drainage device of this application, the liquid component of the landfill gas adheres to the baffle 200 and then collects along the baffle 200 to the lower part of the housing 100. During this process, tar particles contained in the liquid component will adhere to the windward side 201 of the baffle 200. Excessive tar adhesion will increase the resistance to liquid falling on the baffle 200, reducing the efficiency of gas-liquid separation.

[0019] Therefore, the windward side 201 of the partition 200 in this application is coated with a titanium dioxide composite silica (TiO2-SiO2) coating. This photocatalytic material, TiO2, generates highly oxidizing hydroxyl radicals and holes under ultraviolet light excitation. These active oxides have extremely strong oxidizing power, capable of attacking the chemical bonds in tar molecules, decomposing them into small organic molecules, and ultimately converting them into harmless substances such as carbon dioxide and water. The addition of SiO2 increases the specific surface area of ​​TiO2 and the photogenerated carrier separation efficiency, further enhancing the photocatalytic degradation of tar. The drainage device of this application, while achieving gas-liquid separation drainage, can also remove tar impurities accumulated inside the drainage device, further improving the efficiency of gas-liquid separation.

[0020] In one embodiment, the leeward side 202 of the partition 200 is coated with a graphitic carbon nitride / zinc oxide composite coating (g-C3N4 / ZnO). A visible light emitting device 320 is installed on the side wall of the housing 100 facing the leeward side 202, and the visible light emitting device 320 is configured to emit visible light that illuminates the leeward side 202. The landfill gas also includes various microorganisms. The windward side 201 of the partition 200 is subjected to the scouring of high-speed airflow, while the leeward side 202 is subjected to low-speed airflow, which provides a stable environment for microbial attachment. Microorganisms attached to the leeward side 202 combine with moisture and metabolize to produce extracellular polymeric substances (EPS), i.e., biofilms. When too much biofilm accumulates, in addition to increasing the resistance to liquid falling on the partition 200, it also narrows or even blocks the passage for landfill gas between adjacent partitions 200.

[0021] Therefore, in this embodiment, a graphite-phase carbon nitride / zinc oxide composite coating (g-C3N4 / ZnO) is coated on the leeward side 202 of the partition 200. This photocatalytic material, under visible light irradiation, generates highly oxidizing hydroxyl radicals and holes. These reactive oxides have extremely strong oxidizing power, capable of attacking microbial cell membranes and cell walls, destroying their structure, causing leakage of cell contents, and ultimately leading to microbial death. Simultaneously, reactive oxygen species can decompose complex organic molecules in microbial metabolic products, converting the biofilm into harmless substances such as carbon dioxide and water, thereby degrading the biofilm on the partition 200. This further removes the biofilm accumulated inside the drainage device, improving the efficiency of gas-liquid separation, and releasing Zn from ZnO. ²⁺ Disrupting microbial cell membranes can reduce biofilm regeneration.

[0022] In one embodiment, the direction from the air inlet 110 to the air outlet 120 is designated as the first direction, and multiple baffles 200 are staggered along this first direction. The protruding portions of the staggered baffles 200 allow the landfill gas to change direction multiple times, further extending its path. Furthermore, the staggered baffles 200 can receive light more directly, improving photocatalytic efficiency.

[0023] refer to Figure 1In one embodiment, the partition 200 near the air inlet 110 is a first partition 210, and the partition 200 near the air outlet 120 is a second partition 220. A first baffle 211 is provided above the air inlet 110, connecting the first partition 210 and the side wall where the air inlet 110 is located. The first baffle 211 blocks the upward flow of landfill gas, guiding the landfill gas entering from the air inlet 110 downward along the partition 200, ensuring that the landfill gas can flow along a predetermined path after entering the drainage device, thereby achieving more efficient gas-liquid separation. The second baffle 221 is located below the air outlet 120, connecting the second partition 220 and the side wall where the air outlet 120 is located. The second baffle 221 causes the landfill gas to flow along the windward side 201 of the second partition 220, and then along the second baffle 221, flowing out from the air outlet.

[0024] Combination Figure 1 , Figure 3 and Figure 6 In one embodiment, the top of the housing 100 is hemispherical. An ultraviolet (UV) light emitting device 310 is installed near the air inlet, and a visible light emitting device 320 is installed near the air outlet. This arrangement allows the UV light emitting device 310 to concentrate light onto the windward side 201 of the multiple partitions 200, improving the photocatalytic reaction efficiency. Simultaneously, the visible light emitting device 320 can concentrate light onto the leeward side 202 of the multiple partitions 200, similarly improving the photocatalytic reaction efficiency. Therefore, in this embodiment, both the windward side 201 and the leeward side 202 of the upper part of the partitions 200 receive sufficient light coverage, fully stimulating the photocatalytic reaction. Furthermore, the hemispherical top helps to diffuse light in all directions, achieving uniform light energy distribution and improving the utilization rate of the photocatalytic material.

[0025] Combination Figure 4In one embodiment, the drainage device further includes a dual-light source emitting device 330, which includes an ultraviolet light emitting end and a visible light emitting end. The middle part of the housing 100 is cylindrical, and multiple partitions 200 are distributed in the middle part of the housing 100. An ultraviolet light emitting device 310 is installed on the side wall where the air inlet is located, which can directly irradiate the windward surface 201 of the first partition 210. A visible light emitting device 320 is installed on the side wall where the air outlet is located, which can directly irradiate the leeward surface 202 of the second partition 220. Among the multiple partitions 200, the dual-light source emitting device 330 is installed between two adjacent partitions 200, with the ultraviolet light emitting end facing the windward surface 201 of the partition 200 and the visible light emitting end facing the leeward surface 202 of the partition 200. This dual-light source layout can directly project ultraviolet light and visible light onto the corresponding areas of the partitions 200. This allows both the windward side 201 and the leeward side 202 of the partition 200 to be directly irradiated with photocatalytic light, achieving a highly efficient photocatalytic reaction and improving the overall purification efficiency of the device. The aforementioned light-emitting device can be composed of LED lights.

[0026] Combination Figure 5 In one embodiment, the lower part of the housing 100 is arc-shaped and has a drain outlet 130. A reflector 400 is laid on the lower part of the housing 100. The arc-shaped design of the lower part of the housing 100 facilitates the smooth flow of liquid to the drain outlet 130, promoting timely drainage. The reflector 400 reflects ultraviolet or visible light, enhancing the light intensity below the partition 200, which is beneficial for stimulating photocatalytic reactions and thus improving the drainage and purification efficiency of the drainage device. Furthermore, a reflective coating, such as reflective paint or a film, can be applied to the arc-shaped bottom. The reflector 400 can be aluminum foil, aluminized sheet, etc.

[0027] Combination Figure 1 and Figure 5 In one embodiment, a pH sensor (not shown) is provided at the bottom of the housing 100 to detect the pH value of the discharged solution. A dispensing port 140 is also provided at the bottom of the housing 100 to dispense an alkaline substance into the housing 100 based on the pH value detected by the pH sensor. Since the solution may contain acidic substances such as hydrogen sulfide and organic acids, making the solution acidic and corroding the housing 100 and pipes, direct discharge would not meet emission standards. Therefore, this embodiment uses a pH sensor to detect the pH value of the solution. When the pH value exceeds a preset range, an alkaline substance is dispensing into the housing 100 through the dispensing port 140 to neutralize the acidity of the solution. The alkaline substance can be sodium oxide or calcium oxide.

[0028] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A landfill gas pipeline drainage device, characterized in that, For connection to landfill gas pipelines, including: The housing (100) has an air inlet (110) and an air outlet (120), the air inlet (110) and the air outlet (120) being arranged opposite to each other; The partition (200) includes multiple partitions and is fixed in parallel inside the housing (100). The partition (200) includes a windward side (201) and a leeward side (202). The windward side (201) faces the air inlet (110) and the leeward side (202) faces the air outlet (120). The windward side (201) of the partition (200) is coated with a titanium dioxide composite silicon dioxide coating; An ultraviolet light emitting device (310) is mounted on the side wall of the housing (100) facing the windward surface (201), and the ultraviolet light emitting device (310) is configured to emit ultraviolet light that irradiates the windward surface (201).

2. The landfill gas pipeline drainage device as described in claim 1, characterized in that, The leeward side (202) of the partition (200) is coated with a graphite phase carbon nitride / zinc oxide composite coating. A visible light emitting device (320) is installed on the side wall of the housing (100) facing the leeward side (202). The visible light emitting device (320) is configured to emit visible light that irradiates the leeward side (202).

3. The landfill gas pipeline drainage device as described in claim 2, characterized in that, The direction from the air inlet (110) to the air outlet (120) is the first direction, and along the first direction, a plurality of the partitions (200) are staggered.

4. The landfill gas pipeline drainage device as described in claim 3, characterized in that, The partition (200) near the air inlet (110) is the first partition (210), and the partition (200) near the air outlet (120) is the second partition (220). A first baffle (211) is provided above the air inlet (110), and the first baffle (211) connects the first partition (210) and the side wall where the air inlet (110) is located. A second baffle (221) is provided below the air outlet (120), and the second baffle (221) connects the second partition (220) and the side wall where the air outlet (120) is located.

5. The landfill gas pipeline drainage device as described in claim 2, characterized in that, The top of the housing (100) is hemispherical, and an ultraviolet light emitting device (310) is installed on the part of the top near the air inlet (110), and a visible light emitting device (320) is installed on the part of the top near the air outlet.

6. The landfill gas pipeline drainage device as described in claim 5, characterized in that, The drainage device also includes a dual-source light emitting device (330), which includes an ultraviolet light emitting end and a visible light emitting end; The middle part of the housing (100) is cylindrical, and multiple partitions (200) are distributed in the middle part of the housing (100). An ultraviolet light emitting device (310) is installed on the side wall where the air inlet is located, and a visible light emitting device (320) is installed on the side wall where the air outlet is located. Among the multiple partitions (200), a dual light source emitting device (330) is installed between two adjacent partitions (200), and the ultraviolet light emitting end faces the windward side (201) of the partition (200), and the visible light emitting end faces the leeward side (202) of the partition (200).

7. The landfill gas pipeline drainage device as described in claim 6, characterized in that, The lower part of the housing (100) is arc-shaped and has a drain outlet (130). The lower part of the housing (100) is covered with a reflector (400).

8. The landfill gas pipeline drainage device as described in any one of claims 1 to 7, characterized in that, The bottom of the housing (100) is provided with a pH sensor for detecting the pH value of the discharged solution. The lower part of the housing (100) is also provided with a dispensing port (140) for dispensing alkaline substances into the interior of the housing (100) according to the pH value detected by the pH sensor.

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