Unpowered in-situ methane bubble trapping and removing device and use method

Abstract

The invention relates to the field of wetland carbon emission reduction, and particularly discloses an unpowered in-situ methane trapping and removing device based on water body reoxygenation and methane transmission characteristics and a use method, the device comprises a methane trapping and storing chamber, a gas-liquid interface control channel, a methane anti-escape baffle plate, an anti-spiral ring and a triangular bracket. The methane capturing and storing chamber is of a main body structure; the gas-liquid interface control channel is positioned in the marginal area or the outer wall of the methane trapping and storing chamber; the methane anti-escape baffle is positioned on the inner side of the gas-liquid interface control channel and is directly connected with the methane trapping and storing chamber; the anti-helicoid ring and the gas-liquid interface control channel are positioned on the same horizontal plane, and are connected with the methane trapping and storing chamber through a short rod; and the triangular bracket is directly connected with the methane trapping and storing chamber main body. According to the invention, the device integrating methane trapping, storing and oxidizing functions is constructed, so that methane removal can be realized without additional power, material and personnel management, and the device has important significance for reducing methane emission of a water body at low cost.

Description

Technical Field

[0001] This invention relates to the field of wetland carbon reduction, specifically to a non-powered in-situ methane bubble capture and removal device and its usage method. Background Technology

[0002] Wetland carbon reduction is a crucial component of carbon reduction efforts, and the resulting carbon reductions are vital for balancing climate goals and industrial development. However, the decentralized nature and low carbon emission intensity of wetlands make the cost of wetland carbon reduction a significant challenge. Currently, three main technological pathways for wetland carbon reduction exist: vegetation carbon sequestration through increased planting area; carbon reduction through regulating surface water depth and nutrients; and carbon deposition and burial through hydrological processes to promote external carbon input. However, these technologies either require substantial subsequent human investment in management or increase methane emissions from wetlands, making them difficult to widely implement from both a goal-achieving and economic perspective.

[0003] Methane is the second largest greenhouse gas in wetland carbon emissions after carbon dioxide, and its global warming potential is 27 times that of carbon dioxide on a centennial scale. Therefore, reducing methane emissions in wetlands plays a crucial role in wetland carbon reduction and in compensating for the shortcomings of other carbon reduction technologies. Wetland sediments are the primary source of methane; therefore, methane released from the sediment into the air must pass through the overlying water layer. Due to methane's low solubility, 50%–99% of it is transported from the sediment to the atmosphere as bubbles. Methane molecules, with their lowest carbon valence, require a sufficient supply of electron acceptors for oxidation. Oxygen, acting as an electron acceptor, can be continuously replenished to the overlying water through reoxygenation processes, thus providing a feasible option for oxidizing methane to carbon dioxide in the overlying water. Furthermore, due to the high solubility of carbon dioxide, the oxidation products of methane (carbon dioxide) can be released into the air through water dissolution and free diffusion, thereby completing the process of converting methane with high heating potential into carbon dioxide with low heating potential, achieving the effect of methane removal in wetlands.

[0004] Therefore, based on the emission characteristics of methane in wetlands, the difference in solubility between methane and carbon dioxide, and the reoxygenation capacity of water, this invention provides a non-powered in-situ methane bubble capture and removal device and its usage method to solve the problems existing in current wetland carbon reduction technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a non-powered in-situ methane bubble capture and removal device and its usage method, which effectively solves the problems of high management costs, increased methane emissions, and high hydrological requirements in the later stages of wetland carbon reduction technology.

[0006] The present invention solves the above-mentioned technical problems as follows: It provides a non-powered in-situ methane bubble trapping and removal device and its usage method. Under the condition of an overlying water layer, it utilizes the emission characteristics of methane in wetlands, the solubility difference between methane and carbon dioxide, and the reoxygenation capacity of the water body to oxidize methane into carbon dioxide in the overlying water layer. The non-powered in-situ methane bubble trapping and removal device includes a methane trapping and storage chamber, a gas-liquid interface control channel, a methane escape baffle, an anti-screw ring, and a triangular support.

[0007] Preferably, the methane capture and storage chamber is a hemispherical hollow structure with a radius greater than 4 cm.

[0008] Preferably, the gas-liquid interface control channel is located at the edge of the methane capture and storage chamber, and is shaped like an equilateral triangle with a side length of 0.5 cm – 1.0 cm. The number of gas-liquid interface control channels on a single methane bubble capture and removal device is 3-5.

[0009] Preferably, the methane escape baffle is located inside the gas-liquid interface control channel, is arched in shape, and is directly connected to the inner wall of the methane capture and storage chamber on both sides of the gas-liquid interface control channel, with the top of the methane escape baffle disconnected from the inner wall of the methane capture and storage chamber.

[0010] Preferably, the anti-screw ring is on the same horizontal plane as the gas-liquid interface control channel and is located inside the methane capture and storage chamber. It is connected to the inner wall of the methane capture and storage chamber via a short rod, and the distance between the anti-screw ring and the inner wall of the methane capture and storage chamber is 0.5 cm - 1.0 cm.

[0011] Preferably, the triangular support is directly connected to the outer wall or edge of the methane capture and storage chamber, and the support length is greater than 5cm.

[0012] Preferably, the biofilm formation method of the non-powered in-situ methane bubble trapping and removing device is either natural biofilm formation or enhanced biofilm formation. Natural biofilm formation involves placing the methane bubble trapping and removing device directly in the target water body, allowing it to naturally form a biofilm with methane oxidation capabilities. The natural biofilm formation time is 3 days to 90 days. Enhanced biofilm formation involves mixing the methane bubble trapping and removing device with the bottom sediment of the target area for 3 days to 7 days before placing it in the target water body.

[0013] Through the above technical solution, the present invention provides a non-powered in-situ methane bubble trapping and removal device and its usage method, which enables the oxidation of methane in wetlands without human input of energy or electron acceptors. This oxidizes methane with high greenhouse potential into carbon dioxide with low greenhouse potential, and requires no subsequent human management. This solution is expected to become one of the key supporting technologies for low-cost wetland carbon reduction, and the resulting carbon reduction is of crucial significance for balancing climate goals and industrial development. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention or existing technical solutions, the accompanying drawings used in the description of the embodiments or existing technologies will be briefly introduced below, wherein... Figure 2 and Figure 3 Based on the same technical principles Figure 1 As can be seen from the variations, the accompanying drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0015] Figure 1 This is a three-view diagram of a methane bubble trapping and removing device with a gas-liquid interface control channel set in the edge area of ​​the methane trapping and storage chamber, as described in an embodiment of the present invention. Figure 2 This is a three-view diagram of a methane bubble trapping and removing device with a gas-liquid interface control channel set on the outer wall of the methane trapping and storage chamber in an embodiment of the present invention. Figure 3 The image shows a three-view drawing of a methane bubble trapping and removing device with a gas-liquid interface control channel set in the top area of ​​the methane trapping and storage chamber, as described in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1-Methane capture and storage chamber, 2-Gas-liquid interface control channel, 3-Methane escape baffle, 4-Anti-screw ring, 5-Triangular support. Detailed Implementation

[0017] To illustrate the principles and features of this invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. The examples given are only for explaining the invention and are not intended to limit the scope of the invention.

[0018] like Figures 1 to 3As shown in the illustration, a methane bubble trapping and removal device is illustrated as an embodiment. It should be noted that this application does not limit the use of the methane bubble trapping and removal device to direct contact with the bottom sediment via a triangular support. Those skilled in the art should understand that, based on this embodiment, the methane bubble trapping and removal device can be placed at any depth in the water body using other methods, as long as the gas-liquid interface control channel is located below the atmosphere-surface water interface.

[0019] The specific implementation method is as follows: First, the methane bubble trapping and removing device is placed in wetlands with an overlying water layer, such as farmland ditches, fish ponds, or peatlands, and waits for a biofilm to naturally form on the inner wall of the methane trapping and storage chamber 1, forming a biofilm with methane oxidation capabilities. Depending on the water transparency and ambient temperature, the time required for natural biofilm formation ranges from 3 to 90 days. Simultaneously, the methane bubble trapping and removing device captures methane released from the bottom sediment in the form of bubbles and temporarily stores it in the methane trapping and storage chamber 1. Due to the extremely low solubility of methane, when the methane concentration in the methane trapping and storage chamber exceeds a critical value, it will diffuse back into the water at the bottom of the chamber, forming a relatively high methane concentration area, i.e., the methane oxidation zone. By setting the position of the gas-liquid interface control channel 2, the aforementioned methane oxidation zone is confined to the edge of the methane trapping and storage chamber 1. Furthermore, dissolved oxygen generated during the water reoxygenation process easily diffuses into this methane oxidation zone. At this point, the methanogenic bacteria in this area utilize freely diffused oxygen as an electron acceptor to oxidize methane into carbon dioxide. Since carbon dioxide is much more soluble in water than methane, it further dissolves in the water and diffuses freely from the interior of the methane bubble trap to its surroundings. This achieves in-situ capture and oxidation of methane bubbles into carbon dioxide under non-powered conditions.

[0020] Furthermore, to prevent methane bubbles from escaping directly from the gas-liquid interface control channel 2 during the capture process, a methane escape baffle 3 is added to the inside of the gas-liquid interface control channel 2 to ensure that the captured methane first enters the methane capture and storage chamber 1. Additionally, to prevent snails, golden apple snails, and other organisms from encroaching on the methane oxidation zone within the methane bubble capture and removal device during practical application, a snail-proof ring 4 is installed at the same horizontal position as the gas-liquid interface control channel 2 to prevent reduced methane oxidation efficiency due to biological encroachment.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any equivalent structural transformations made based on the technical principles involved in the present invention, utilizing the description and drawings of the present invention, or direct or indirect applications in other related technical fields, should be included within the protection scope of the present invention.

Claims

1. A non-powered in-situ methane bubble trapping and removal device and its usage method, characterized in that, The device includes a methane capture and storage chamber, a gas-liquid interface control channel, a methane escape baffle, an anti-screw ring, and a triangular support.

2. The non-powered in-situ methane bubble trapping and removal device and its usage method according to claim 1, characterized in that, The methane capture and storage chamber is a hollow structure, including but not limited to hemispherical, semi-cubic, semi-rectangular, cubic or rectangular structures, and has the ability to capture and store bubbles.

3. The methane capture and storage chamber according to claim 2, characterized in that, The materials used for the methane capture and storage chamber include, but are not limited to, materials that are insoluble in water, such as metal, plastic, wood, stone, cement, or concrete.

4. The non-powered in-situ methane bubble trapping and removal device and its usage method according to claim 1, characterized in that, The gas-liquid interface control channel is located in the edge area of ​​the methane capture and storage chamber or on the outer wall of the methane capture and storage chamber, including but not limited to openings in the edge area of ​​the methane capture and storage chamber, or openings directly in the middle of its outer wall, or openings at the top and connecting to an internal channel extending into the interior of the methane capture and storage chamber.

5. The gas-liquid interface control channel according to claim 4, characterized in that, The shape of the gas-liquid interface control channel includes, but is not limited to, triangles, circles, squares, or rectangles.

6. The gas-liquid interface control channel according to claim 4, characterized in that... The channel area or cross-sectional area of ​​a single gas-liquid interface control channel should be greater than 0.0001 cm². 2 .

7. The non-powered in-situ methane bubble trapping and removal device and its usage method according to claim 1, characterized in that, The methane escape baffle is located inside the gas-liquid interface control channel, wherein the two sides of the methane escape baffle are directly connected to the inner walls of the two sides of the gas-liquid interface control channel, and the top of the methane escape baffle is disconnected from the inner wall of the methane capture and storage chamber.

8. The non-powered in-situ methane bubble trapping and removal device and its usage method according to claim 1, characterized in that, The anti-screw ring is located inside the methane capture and storage chamber and is at the same horizontal level as the gas-liquid interface control channel. The anti-screw ring is directly connected to the inner wall of the methane capture and storage chamber or the outer wall of the gas-liquid interface control channel via a short rod.

9. The non-powered in-situ methane bubble trapping and removal device and its usage method according to claim 1, characterized in that, The tripod is directly connected to the outer wall or bottom edge of the methane capture and storage chamber, and the tripod length should be greater than 3 cm.

10. The non-powered in-situ methane bubble trapping and removal device and its method of use according to claim 1, characterized in that, The biofilm formation methods for the methane bubble trapping and removing device include natural biofilm formation, enhanced biofilm formation, and biofilm formation by adding methane-oxidizing bacteria. Natural biofilm formation involves placing the methane bubble trapping and removing device directly in the target water body, allowing it to naturally form a biofilm with methane oxidation capabilities. The enhanced biofilm formation involves mixing the methane bubble trap with the sediment of the target area for 3-7 days before placing it into the target water body. The addition of methane-oxidizing bacteria biofilm involves adding methane-oxidizing bacteria, including but not limited to one or more of Methylmonas, Methylococcus, and Methylbacillus, while mixing the methane bubble trap with the sediment of the target area. After 1-3 days, it is then placed into the target water body.

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