Drainage device for branch gas pipe of biogas combustion torch system

Abstract

The utility model provides a drainage device for a branch gas pipe of a methane combustion torch system, and belongs to the technical field of landfill gas recycling. Comprising a gas guide gabion well, a first tee joint, a gas collection station and a drainage well. The first tee joint comprises a first connector, a second connector and a third connector, the first connector is connected with the gas outlet end of the gas guide gabion well, the second connector is connected with a water collecting pipe extending downwards in the longitudinal direction, a drainage ball valve is arranged at the tail end of the water collecting pipe, the third connector is connected with an inlet of the gas collecting station, and an outlet of the gas collecting station is connected with the drainage well through a drainage pipe. By adopting the drainage device, the problems of equipment failure and potential safety hazards caused by the fact that accumulated water generated by landfill gas in the branch gas pipes is not effectively drained in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of landfill gas recovery and utilization technology, and in particular to a drainage device for the branch pipe of a biogas combustion flare system. Background Technology

[0002] Currently, over 90% of urban household waste in my country is disposed of through landfill. Anaerobic fermentation within the landfill produces large amounts of landfill gas, which contains 40%–60% CH4, 30%–50% CO2, and saturated water vapor (H2S), among other gases. Since methane in landfill gas is a high greenhouse gas but also has a certain calorific value, the best approach is to utilize it as a new energy source. This would not only reduce fossil fuel consumption but also decrease greenhouse gas emissions.

[0003] In related technologies, landfill gas generated from landfill waste is typically collected using gas-conducting gabions and then transported via branch pipelines to a biogas flare system as fuel. The flare system then handles combustion and exhaust gas treatment, converting greenhouse gases such as methane, which might otherwise escape into the atmosphere, into carbon dioxide and water vapor, effectively reducing greenhouse gas emissions. Simultaneously, the biogas is used as a heat source for efficient combustion, generating electricity from the combustion heat, thus achieving secondary utilization.

[0004] However, during the process of landfill gas being transported to the flare system through branch gas pipelines, the water vapor contained in the gas will condense when it encounters low-temperature sections or pipe walls in the branch gas pipelines. If too much condensate accumulates in the pipeline, it will lead to a smaller gas flow area in the pipeline, resulting in negative pressure and blockage, which may cause abnormal equipment shutdown, or cause the biogas combustion flare system to frequently overload due to operation under load, resulting in equipment failure and potential safety hazards. Utility Model Content

[0005] This utility model provides a drainage device for the branch pipe of a biogas combustion flare system, which can solve the problem of equipment failure and safety hazards caused by the ineffective drainage of water generated by the buried gas in the branch pipe in related technologies. The technical solution is as follows:

[0006] This utility model provides a drainage device for the branch pipe of a biogas combustion flare system, comprising: a gas-guiding gabion well, a first tee, a gas collection station, and a drainage well.

[0007] The first tee includes a first interface, a second interface, and a third interface. The first interface is connected to the air outlet of the gas-guiding gabion well. The second interface is connected to a water collection pipe extending downward in the longitudinal direction. A drain ball valve is provided at the end of the water collection pipe. The third interface is connected to the inlet of the gas gathering station. The outlet of the gas gathering station is connected to the drainage well through a drain pipe.

[0008] Optionally, the first interface is connected to the air outlet of the gas-conducting gabion well via a steel wire hose.

[0009] Optionally, polyethylene hoses are used to connect the third interface to the inlet of the gas collection station and the outlet of the gas collection station to the drainage well.

[0010] Optionally, the first tee, the inlet and outlet of the gas gathering station, and the polyethylene hose are all fixedly connected by clamps.

[0011] Optionally, the pipe fixing diameter of the clamp is in the range of 92 to 97 mm.

[0012] Optionally, a manual butterfly valve is provided at the outlet end of the gas-conducting gabion well.

[0013] Optionally, the drain pipe includes a drain section extending longitudinally into the drain well, and an exhaust end extending from the drain well. The drain section is provided with a drain hole, and the exhaust end is provided with a vent cap.

[0014] Optionally, it also includes a second three-way valve, which includes a fourth interface, a fifth interface, and a sixth interface. The fourth interface is connected to the outlet of the gas gathering station, the fifth interface is connected to the drain pipe, and the sixth interface is connected to a flame arrester.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] The drainage device for the branch pipe of a biogas combustion flare system provided in this embodiment optimizes the traditional buried gas transmission pipeline. It modifies the exhaust pipeline between the outlet of the gas-collecting gabion well and the inlet of the gas collection station by adding a drainage path consisting of a water supply pipe and a drain ball valve through a first tee. During routine buried gas extraction, the condensate in the buried gas supplied to the biogas combustion flare system can be discharged using the drainage pipe and well at the rear of the gas collection station. Real-time observation and periodic opening of the drain ball valve allow for timely discharge of condensate stored in the water collection pipe and the pipeline at the front end of the gas collection station. This prevents condensate accumulation from affecting normal buried gas extraction, reduces equipment overload, improves the overall exhaust system efficiency, and effectively solves the problem of equipment failure and safety hazards caused by ineffective drainage of water from buried gas in the branch pipes in related technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the front half of a drainage device for a branch pipe of a biogas combustion flare system provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the rear half of a drainage device for a branch pipe of a biogas combustion flare system provided in an embodiment of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the clamp provided in this embodiment of the utility model;

[0021] Figure 4 This is a top view of the clamp provided in this embodiment of the utility model.

[0022] In the diagram: 1-Gas-guiding gabion well; 2-First tee; 3-Gas-gathering station; 4-Drainage well; 5-Water collection pipe; 6-Drainage pipe; 7-Clamp; 8-Manual butterfly valve; 9-Second tee; 21-First interface; 22-Second interface; 23-Third interface; 51-Drainage ball valve; 61-Drainage section; 62-Exhaust end; 63-Wind cap; 71-Clamp head; 72-Steel strip; 73-Screw; 91-Fourth interface; 92-Fifth interface; 93-Sixth interface; 611-Drainage hole; 711-Telescopic buckle; 721-Clamping hole; m-Flame arrester. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the front half of a drainage device for a branch pipe of a biogas combustion flare system provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the rear half of a drainage device for a branch pipe of a biogas combustion flare system provided in an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of the clamp provided in this embodiment of the utility model; Figure 4 This is a top view of the clamp provided in an embodiment of this utility model. Figures 1 to 4 As shown, this utility model embodiment provides a drainage device for the branch pipe of a biogas combustion flare system, including a gas guide gabion well 1, a first tee 2, a gas collection station 3, and a drainage well 4.

[0025] The first three-way connector 2 includes a first interface 21, a second interface 22 and a third interface 23. The first interface 21 is connected to the air outlet of the gas-guiding gabion well 1. The second interface 22 is connected to a water collection pipe 5 extending downward in the longitudinal direction. A drain ball valve 51 is installed at the end of the water collection pipe 5. The third interface 23 is connected to the inlet of the gas collection station 3. The outlet of the gas collection station 3 is connected to the drainage well 4 through a drain pipe 6.

[0026] In this embodiment of the invention, landfill gases such as methane and carbon dioxide generated from the landfill in the garbage collection trough are collected through the gas-guiding gabion well 1. An outlet is formed by an opening at the top of the gas-guiding gabion well 1 and connecting corresponding valves and pipe structures, allowing the landfill gases to be discharged from the well. Under normal operating conditions, with a temporary pump structure installed at the gas collection station 3 or at the outlet of the gas-guiding gabion well 1 to provide power for pumping, the landfill gases sequentially enter the gas collection station 3 through the corresponding connecting pipes and the first tee 2 for pretreatment such as pressure reduction, heating, antifreeze addition, pressure regulation, and metering. Then, the gases are discharged to the biogas combustion flare through the rear pipe of the gas collection station 3. During this process, if condensate is produced from the biogas, it will flow into the drainage well 4 through the drainage pipe 6 for routine discharge. Furthermore, the first interface 21 is connected to the outlet of the gas-guiding gabion well 1 via a steel wire hose. Its inner layer is made of transparent polyurethane material, smooth and flat, with good wear resistance and corrosion resistance, ensuring smooth flow of the transported substances and facilitating observation of the flow of substances inside the pipe. It also features a reinforcing layer composed of spiral steel wires, providing support and pressure resistance to the inner hose structure, enabling it to withstand certain internal pressure and external compression without deformation, ensuring its service life. When biogas condenses due to various environmental factors after leaving the output end, staff can observe the condensation through the transparent steel wire hose. When only a small amount of condensation is produced, this condensation will first be discharged through the second interface 22 of the first tee 2 and stored in the water collection pipe 5, without affecting the operation of the entire exhaust pipeline. When the condensation accumulates to a certain level and can be clearly observed through the steel wire hose, the drain ball valve 51 at the end of the water collection pipe 5 can be opened periodically to discharge the condensation generated in the front-end pipeline of the gas collection station 3, avoiding affecting the gas extraction of the entire pipeline system.

[0027] The drainage device for the branch pipe of the biogas combustion flare system provided in this embodiment optimizes the traditional buried gas transmission pipeline. It modifies the exhaust pipeline between the outlet end of the gas-collecting gabion well 1 and the inlet end of the gas collection station 3, adding a drainage path consisting of a water collection pipe 5 and a drainage ball valve 51 by setting a first tee 2. During routine extraction of buried gas, the condensate in the buried gas transported to the biogas combustion flare system can be discharged using the drainage pipe 6 and drainage well 4 at the rear end of the gas collection station 3. By real-time observation and periodic opening of the drainage ball valve 51, the condensate stored in the water collection pipe 5 and the pipeline at the front end of the gas collection station 3 can be discharged promptly, preventing condensate accumulation from affecting the normal extraction of buried gas, reducing equipment overload, improving the overall exhaust system efficiency, and effectively solving the problem of equipment failure and safety hazards caused by the ineffective drainage of water generated by buried gas in the branch pipe in related technologies.

[0028] Optionally, polyethylene hoses are used to connect the third interface 23 to the inlet of the gas collecting station 3, and to connect the outlet of the gas collecting station 3 to the drainage well 4. Exemplarily, in this embodiment of the invention, a hose with clamps 7 is used for locking the connection between the third interface 23 and the inlet of the gas collecting station 3, and between the outlet of the gas collecting station 3 and the drainage well 4. This design is simple, easy to install, and convenient for long-distance installation. The clamp 7 includes a clamp head 71 and a steel strap 72 for securing the pipe. The steel strap 72 is wound and one end is slidably engaged with a telescopic buckle 711 on the clamp head 71 through holes 721 arranged on the steel strap 72. Finally, the screw 73 on the clamp head 71 is tightened to secure the telescopic buckle 711, thus locking the pipe. Furthermore, by adjusting the locking position of the steel strap 72, the clamp 7 can achieve stable locking of pipes with a diameter range of 92 to 97 mm.

[0029] Optionally, a manual butterfly valve 8 is provided at the outlet end of the gas-conducting gabion well 1. Exemplarily, in this embodiment of the present invention, by providing a manual butterfly valve 8 at the outlet end of the gas-conducting gabion well 1, the operator can seal the gas-conducting gabion well 1 as needed to prevent the output of new buried gas, and facilitate the inspection, disassembly and maintenance of the pipes and various components connected to the outlet end, thereby improving the overall practicality.

[0030] Optionally, the drain pipe 6 includes a drain section 61 extending longitudinally into the drain well 4, and an exhaust end 62 extending from the drain well 4. The drain section 61 is provided with drain holes 611, and the exhaust end 62 is provided with a vent cap 63. Exemplarily, in this embodiment of the present invention, the drain pipe 6 has an overall "U" shaped structure. One end of the drain pipe is connected to the fifth interface 92 of the second tee 9 provided on the rear end pipe of the gas collection station 3. When condensate enters the drain pipe 6, it will first flow from top to bottom and be stored in the riser section on one side of the drain section 61. When the liquid level reaches a certain height, it will be discharged into the drain well 4 through multiple drain holes 611 spaced apart on the other riser section, realizing the uniform and stable discharge and collection of condensate. The part of the buried gas that enters is discharged outward through the vent cap 63 provided at the top of the other riser section. Only the gas in the pipe is allowed to be discharged smoothly through it, and the outdoor airflow is not allowed to flow back into the pipe, so as to ensure the overall pressure of the pipe and the smoothness of drainage.

[0031] Optionally, the second three-way valve 9 includes a fourth interface 91, a fifth interface 92, and a sixth interface 93. The fourth interface 91 is connected to the outlet of the gas collection station 3, the fifth interface 92 is connected to the drain pipe 6, and the sixth interface 93 is connected to a flame arrester m. Further, after the buried gas from the gas collection station 3 passes through the second three-way valve 9, the condensate generated inside is discharged and collected through the fifth interface 92, while the gas continues to be discharged into the biogas combustion flare system through the sixth interface 93 via a subsequent pipeline. By installing a flame arrester m on the downstream pipeline, in the event of a special accident where the buried gas in the pipeline is ignited, the spread of the buried gas and flame is blocked, preventing it from spreading to the entire pipeline network and further escalating the accident, thus improving the safety of the entire drainage device.

[0032] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drainage device for the branch pipe of a biogas combustion flare system, characterized in that, include: The gas-guiding gabion well (1), the first tee (2), the gas-gathering station (3), and the drainage well (4) The first tee (2) includes a first interface (21), a second interface (22) and a third interface (23). The first interface (21) is connected to the air outlet of the gas-conducting gabion well (1). The second interface (22) is connected to a water collection pipe (5) extending downward in the longitudinal direction. A drain ball valve (51) is provided at the end of the water collection pipe (5). The third interface (23) is connected to the inlet of the gas collection station (3). The outlet of the gas collection station (3) is connected to the drainage well (4) through a drain pipe (6).

2. The drainage device for the branch pipe of a biogas combustion flare system according to claim 1, characterized in that, The first interface (21) is connected to the air outlet of the gas-conducting gabion well (1) via a steel wire hose.

3. The drainage device for the branch pipe of a biogas combustion flare system according to claim 1, characterized in that, The third interface (23) is connected to the inlet of the gas collection station (3), and the outlet of the gas collection station (3) is connected to the drainage well (4) using polyethylene hoses.

4. The drainage device for the branch pipe of a biogas combustion flare system according to claim 3, characterized in that, The inlet and outlet of the first three-way valve (2), the gas collection station (3), and the polyethylene hose are all fixedly connected by clamps (7).

5. The drainage device for the branch pipe of a biogas combustion flare system according to claim 4, characterized in that, The pipe fixing diameter range of the clamp (7) is 92 to 97 mm.

6. The drainage device for the branch pipe of a biogas combustion flare system according to any one of claims 1 to 5, characterized in that, The outlet end of the gas-conducting gabion well (1) is equipped with a manual butterfly valve (8).

7. The drainage device for the branch pipe of a biogas combustion flare system according to any one of claims 1 to 5, characterized in that, The drain pipe (6) includes a drain section (61) extending longitudinally into the drain well (4) and an exhaust end (62) extending from the drain well (4). The drain section (61) is provided with a drain hole (611), and the exhaust end (62) is provided with a vent cap (63).

8. The drainage device for the branch pipe of a biogas combustion flare system according to any one of claims 1 to 5, characterized in that, It also includes a second three-way connector (9), which includes a fourth interface (91), a fifth interface (92) and a sixth interface (93). The fourth interface (91) is connected to the outlet of the gas collection station (3), the fifth interface (92) is connected to the drain pipe (6), and the sixth interface (93) is connected to a flame arrester (m).

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