Landfill leachate anaerobic tank methane traceable and recyclable system

Abstract

The utility model discloses a landfill leachate anaerobic tank methane traceable and recyclable system which comprises an anaerobic tank and a gas holder, a methane suction pipeline is arranged on the top wall in the anaerobic tank through a fastening assembly, the end, extending out of the anaerobic tank, of the methane suction pipeline is communicated with the gas holder, a first gas suction part is further arranged on the methane suction pipeline, and a second gas suction part is further arranged on the gas suction part. And the gas holder is communicated with an external waste incineration power generation hearth through a conveying assembly. According to the device, methane gas generated by the anaerobic tank can be effectively sucked into the gas holder for unified collection, and then the methane gas in the gas holder is conveyed to the waste incineration power generation hearth for combustion supporting, so that recycling of the methane gas can be realized; and the methane gas can be converted into low-harm carbon dioxide from high-harm greenhouse gas, so that the environment-friendly effect can be achieved, and the problems that air pollution is caused and the greenhouse effect is aggravated due to the fact that the methane gas is directly discharged into the air can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of methane treatment in anaerobic ponds, and particularly to a traceable and recyclable methane system for anaerobic ponds of landfill leachate. Background Art

[0002] At present, landfill leachate refers to the water contained in the landfill itself, rain and snow water entering the landfill and other water, minus the saturated water holding capacity of the landfill and the covering soil layer, and passing through the landfill layer and the covering soil layer to form a high-concentration organic wastewater, or the water leaked from the garbage piled up for incineration.

[0003] Landfill leachate has characteristics different from general urban sewage: high BOD5 and COD concentrations, high metal content, large changes in water quality and quantity, high ammonia nitrogen content, and imbalance in the proportion of microbial nutrients. The treatment of landfill leachate has always been a thorny problem for landfill sites / landfill power plants. Anaerobic biological treatment technology can decompose and metabolize the organic matter in landfill leachate by anaerobic bacteria under anaerobic conditions and produce methane at the same time. Compared with aerobic biological treatment technology, anaerobic biological treatment technology has a high one-time investment cost, but its long-term operation and maintenance costs are low, energy consumption is low, and the system is stable.

[0004] In the related art, since methane is emitted through anaerobic biological treatment technology, methane is recorded as a gas type for identifying the emission source of anaerobic ponds for leachate treatment in ISO14064-1:2018 in terms of carbon emissions. As a highly harmful greenhouse gas, direct emission of methane into the air will cause air pollution and exacerbate the greenhouse effect. Therefore, there is an urgent need for a system that can collect and reuse such highly harmful gas as methane and can be traced and transformed. Utility Model Content

[0005] The purpose of the present application is to provide a traceable and recyclable methane system for anaerobic ponds of landfill leachate to solve the problem that in the related art, since methane is emitted through anaerobic biological treatment technology, and as a highly harmful greenhouse gas, direct emission of methane into the air will cause air pollution and exacerbate the greenhouse effect.

[0006] A traceable and recyclable methane system for anaerobic ponds of landfill leachate provided by the present application adopts the following technical solution:

[0007] A traceable and recyclable methane system for anaerobic ponds of landfill leachate includes an anaerobic pond and a gas holder. A methane suction pipeline is arranged on the top wall inside the anaerobic pond through a fastening component. One end of the methane suction pipeline extending outside the anaerobic pond is communicated with the gas holder. A first air extraction component is also arranged on the methane suction pipeline. The gas holder is communicated with an external landfill power generation furnace through a conveying component.

[0008] Furthermore, the methane suction pipeline includes multiple methane suction branch pipes. The multiple methane suction branch pipes are arranged on the top wall inside the anaerobic tank through the fastening assembly. One ends of the multiple methane suction branch pipes are simultaneously connected to a methane suction main pipe, and one end of the methane suction main pipe is communicated with the gas holder.

[0009] Furthermore, flame arresters are arranged on each of the multiple methane suction branch pipes.

[0010] Furthermore, a methane gas concentration detector and a pipeline flowmeter are also arranged on the methane suction main pipe.

[0011] Furthermore, the conveying assembly includes a first conveying pipeline connected to one side of the gas holder. The end of the first conveying pipeline far from the gas holder is communicated with an external waste incineration power generation furnace, and a second air extraction component is also arranged on the first conveying pipeline.

[0012] Furthermore, a second conveying pipeline is also connected to the first conveying pipeline. One end of the second conveying pipeline is communicated with an external torch combustion structure.

[0013] Furthermore, check valves are arranged on the methane suction main pipe, the first conveying pipeline and the second conveying pipeline.

[0014] Furthermore, a pressure transmitter is also arranged on the first conveying pipeline near the end connected to the gas holder.

[0015] Furthermore, a sealing cover is arranged outside the anaerobic tank.

[0016] Furthermore, the fastening assembly includes multiple fastening arc sleeves sleeved on the methane suction branch pipes. Fastening blocks are arranged at both ends of the fastening arc sleeves, and the two fastening blocks are both connected to the top wall inside the anaerobic tank through fastening bolts.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: By setting up a structure in which the anaerobic tank, the gas holder, the methane suction pipeline, the fastening assembly, the first air extraction component and the conveying assembly cooperate with each other, the methane gas generated by the anaerobic tank can be effectively sucked into the gas holder, so as to realize the unified collection of methane gas. Then, the methane gas collected in the gas holder can be transported to the waste incineration power generation furnace for combustion and combustion support, so as to effectively collect and process the methane gas, and at the same time, the methane gas can be recycled and traced for transformation. In this way, the resource utilization of methane gas can be realized, which is beneficial to the recycling of resources and can convert methane gas from a highly harmful greenhouse gas into a low-harmful carbon dioxide, which is beneficial to achieving an environmental protection effect. Furthermore, the problem that the direct emission of methane gas into the air will cause air pollution and exacerbate the greenhouse effect can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the methane traceable and resource - recyclable system of the landfill leachate anaerobic pond in the embodiment of the present application.

[0019] Figure 2 It is a schematic structural diagram of the fastening component in the embodiment of the present application.

[0020] Explanation of reference numerals:

[0021] 1. Anaerobic pond; 2. Gas holder; 3. Methane suction pipeline; 31. Methane suction branch pipe; 311. Flame arrester valve; 32. Methane suction main pipe; 321. First air extraction component; 322. Methane gas concentration detector; 323. Pipeline flowmeter; 4. Landfill incineration power generation furnace; 5. Fastening arc sleeve; 51. Fastening block; 52. Fastening bolt; 6. First conveying pipeline; 61. Second air extraction component; 62. Second conveying pipeline; 7. Torch combustion structure; 8. Check valve; 9. Sealing cover. Detailed implementation manners

[0022] The following further elaborates on the present application in conjunction with the attached Figure 1-2 for a more detailed description.

[0023] The embodiment of the present application discloses a methane traceable and resource - recyclable system for a landfill leachate anaerobic pond. Referring to Figure 1 , in this embodiment, the methane traceable and resource - recyclable system for the landfill leachate anaerobic pond includes an anaerobic pond 1, a gas holder 2, a methane suction pipeline 3, a fastening component, a first air extraction component 321, and a conveying component. Among them, the anaerobic pond 1 can continuously produce methane gas; the gas holder 2 is placed on one side of the anaerobic pond 1 for storing methane gas; the methane suction pipeline 3 is installed on the top wall inside the anaerobic pond 1 through the fastening component, and the output end of the methane suction pipeline 3 extends outside the anaerobic pond 1 and is interconnected with one side of the gas holder 2.

[0024] Specifically, the methane suction pipeline 3 includes a methane suction branch pipe 31 and a methane suction main pipe 32. Among them, multiple methane suction branch pipes 31 are provided. The multiple methane suction branch pipes 31 are respectively fixedly installed on the top wall inside the anaerobic pond 1 through the fastening component. Both ends of these methane suction branch pipes 31 are provided with suction ports, so that the gas in the anaerobic pond 1 enters the methane suction branch pipes 31 along the suction ports.

[0025] Preferably, flame arrester valves 311 are installed at one ends of the multiple methane suction branch pipes 31 close to the suction ports. The setting of these flame arrester valves 311 is for safety, and can prevent the methane combustion accident at the rear end from igniting the entire anaerobic pond 1 along the methane suction pipeline 3.

[0026] More specifically, referring to Figure 1 and Figure 2, in this embodiment, the fastening assembly includes a fastening arc sleeve 5, fastening blocks 51 and fastening bolts 52. Among them, a plurality of the fastening arc sleeves 5 are provided, and the plurality of fastening arc sleeves 5 are respectively sleeved on the outer sides of the methane suction branch pipes 31; a plurality of fastening blocks 51 are provided, and the plurality of fastening blocks 51 are grouped in pairs, and each group of fastening blocks 51 is symmetrically installed at both ends of the fastening arc sleeve 5, and fastening holes are formed in these fastening blocks 51, and a plurality of threaded grooves are formed in the top wall inside the anaerobic tank 1; when these fastening blocks 51 are pressed against the top wall inside the anaerobic tank 1, these threaded grooves respectively correspond to these fastening holes.

[0027] And a plurality of the fastening bolts 52 are provided, and the plurality of fastening bolts 52 are respectively matched with these fastening holes, and the plurality of fastening bolts 52 are respectively threadedly connected with these threaded grooves. By respectively passing these fastening bolts 52 through the fastening blocks 51 along these fastening holes, and then respectively screwing these fastening bolts 52 into these threaded grooves, the fastening arc sleeve 5 fastens and installs the methane suction branch pipe 31 on the top wall inside the anaerobic tank 1.

[0028] At the same time, one end of the methane suction main pipe 32 is simultaneously communicated with the middle parts of these methane suction branch pipes 31, the other end of the methane suction main pipe 32 extends out of the anaerobic tank 1, and is communicated with one side of the gas holder 2. And the first air extraction member 321 is a fan, and the fan is installed at one end of the methane suction main pipe 32 extending out of the anaerobic tank 1, and the fan is located on the side close to the anaerobic tank 1.

[0029] When the fan is started, the suction ports at both ends of these methane suction branch pipes 31 effectively absorb the methane gas inside the anaerobic tank 1, so as to absorb the methane gas into the methane suction main pipe 32, and then collect and intake the methane gas into the gas holder 2 through the methane suction main pipe 32, so as to store the methane gas by using the gas holder 2.

[0030] Preferably, referring to Figure 1 , in this embodiment, a methane gas concentration detector 322 and a pipeline flowmeter 323 are further installed on the methane suction main pipe 32. Through the settings of the methane gas concentration detector 322 and the pipeline flowmeter 323, the concentration and flow rate of the methane gas can be detected, so as to determine the total emission amount of the methane gas accordingly.

[0031] And a one-way valve 8 is further installed at one end of the methane suction main pipe 32 close to the gas holder 2. The setting of the one-way valve 8 can ensure that the gas path is only from the anaerobic tank 1 to the gas holder 2, so as to avoid the situation of gas backflow.

[0032] In addition, one end of the conveying assembly is connected to one side of the gas holder 2, and the other end of the conveying assembly is connected to the external waste incineration power generation furnace 4, so as to convey the methane gas in the gas holder 2 into the external waste incineration power generation furnace 4. A burner is provided in the waste incineration power generation furnace 4 to facilitate the ignition of the methane gas.

[0033] Specifically, the conveying assembly includes a first conveying pipeline 6 and a second air extraction member 61. Among them, one end of the first conveying pipeline 6 is communicated with one side of the gas holder 2, and the other end of the first conveying pipeline 6 is communicated with the external waste incineration power generation furnace 4; the second air extraction member 61 is also a fan, and the fan is installed on the first conveying pipeline 6.

[0034] When the fan is started, the methane gas in the gas holder 2 is uniformly conveyed into the external waste incineration power generation furnace 4 through the first conveying pipeline 6, and then the burner in the waste incineration power generation furnace 4 ignites the methane gas, so as to achieve the effect of burning and assisting combustion of the methane gas.

[0035] Therefore, through the above structure, while the methane gas can be effectively collected and processed, the methane gas can also be reused and traceably transformed, so that the resource utilization of the methane gas can be realized, which is beneficial to the reuse of resources and can convert the methane gas from a highly harmful greenhouse gas into a low-harmful carbon dioxide, which is beneficial to achieving an environmental protection effect, and further can solve the problems that the direct emission of methane gas into the air will cause air pollution and exacerbate the greenhouse effect.

[0036] In addition, referring to Figure 1 , in this embodiment, a second conveying pipeline 62 is further connected to the first conveying pipeline 6. One end of the second conveying pipeline 62 far from the first conveying pipeline 6 is communicated with the external flare combustion structure 7. Check valves 8 are installed at one end of the first conveying pipeline 6 close to the waste incineration power generation furnace 4 and at one end of the second conveying pipeline 62 close to the flare combustion structure 7. By setting the check valves 8, it can be ensured that the gas path is only from the gas holder 2 to the waste incineration power generation furnace 4 or the flare combustion structure 7, thus avoiding the situation of gas backflow.

[0037] Specifically, the methane gas stored in the gas holder 2 has two destinations: one is conventional, through the cooperation of the first conveying pipeline 6 and the second air extraction member 61, the methane gas is introduced into the waste incineration power generation furnace 4 for combustion and assisting combustion. The other is to be introduced into the flare combustion structure 7 for combustion to consume the methane gas, and the flare combustion can play a safety role; when the waste incineration power generation furnace 4 is shut down for maintenance or other unexpected situations that cannot consume methane, in order to cope with the continuously produced methane in the anaerobic pond 1, and at the same time when the gas holder 2 is full of storage, the methane needs to be introduced into the flare combustion structure 7 for combustion and consumption.

[0038] Meanwhile, in this embodiment, a pressure transmitter is further installed at one end of the first conveying pipeline 6 close to the gas holder 2, and the pressure transmitter is located on the side of the second air extraction member 61 away from the gas holder 2. By providing this pressure transmitter, the pressure inside the first conveying pipeline 6 can be displayed in real time, so as to avoid overpressure operation, and thus can be used as a safe operation index.

[0039] Preferably, referring to Figure 1 , in this embodiment, a sealing cover 9 is hermetically covered outside the anaerobic pond 1, so that the anaerobic pond 1 can be completely sealed, which can ensure that the methane gas continuously produced by the anaerobic pond 1 does not mix with the external air, thus ensuring safe production and preventing the leakage of methane gas, and further ensuring the resource utilization and environmental friendliness of methane gas.

[0040] Meanwhile, one end of the main methane suction pipe 32 far from the methane suction branch pipe 31 sequentially penetrates and extends outside the anaerobic pond 1 and the sealing cover 9. In this way, sealing treatments are carried out at the positions where the main methane suction pipe 32 is in contact with both the anaerobic pond 1 and the sealing cover 9. In addition, sealing treatments are also carried out at the positions where the main methane suction pipe 32 and the first conveying pipeline 6 are respectively communicated with the gas holder 2. Moreover, sealing treatments are carried out between the first conveying pipeline 6 and the waste incineration power generation furnace chamber 4 and between the second conveying pipeline 62 and the torch combustion structure 7. In this way, an effective sealing effect can be achieved on the overall system, thus avoiding the problems of air pollution and aggravated greenhouse effect caused by the leakage of methane gas.

[0041] The implementation principle of a methane traceable and resource - utilizable system for a landfill leachate anaerobic pond in an embodiment of the present application is as follows: When it is necessary to collect and store the methane gas continuously produced by the anaerobic pond 1, the first air extraction member 321 is started, so that the suction ports at both ends of these methane suction branch pipes 31 effectively absorb the methane gas inside the anaerobic pond 1, absorb the methane gas into the main methane suction pipe 32, and then uniformly collect and introduce it into the gas holder 2 through the main methane suction pipe 32, so as to store the methane gas by using the gas holder 2.

[0042] When the methane gas stored in the gas holder 2 needs to be burned and consumed, the second air extraction member 61 is started, and the methane gas in the gas holder 2 is uniformly conveyed into the waste incineration power generation furnace chamber 4 through the first conveying pipeline 6, or uniformly conveyed into the torch combustion structure 7 through the second conveying pipeline 62 to realize the combustion treatment of the methane gas.

[0043] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, are similarly included in the patent protection scope of the present utility model.

Claims

1. A methane traceability and resource recovery system for anaerobic pools of landfill leachate, characterized by: The invention comprises an anaerobic tank (1) and a gas cabinet (2); a methane suction pipe (3) is arranged on the top wall inside the anaerobic tank (1) via a fastening assembly; one end of the methane suction pipe (3) extending outside the anaerobic tank (1) is connected to the gas cabinet (2); a first air extraction member (321) is also arranged on the methane suction pipe (3); and the gas cabinet (2) is connected to an external waste incineration power generation furnace (4) via a conveying assembly.

2. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 1 is characterized by: The methane extraction pipeline (3) comprises a plurality of methane extraction branch pipes (31), and the plurality of methane extraction branch pipes (31) are arranged on the top wall inside the anaerobic tank (1) through the fastening assembly, and one end of the plurality of methane extraction branch pipes (31) is simultaneously connected to a methane extraction main pipe (32), and one end of the methane extraction main pipe (32) is connected to the gas cabinet (2).

3. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 2 is characterized by: A flame arrester (311) is provided on each of the plurality of methane extraction branch pipes (31).

4. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 2 is characterized by: The methane extraction main pipe (32) is also provided with a methane gas concentration detector (322) and a pipeline flow meter (323).

5. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 2 is characterized by: The conveying assembly comprises a first conveying pipeline (6) connected to one side of the gas cabinet (2); an end of the first conveying pipeline (6) away from the gas cabinet (2) is connected to an external waste incineration power generation furnace (4); and a second exhaust component (61) is also provided on the first conveying pipeline (6).

6. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 5 is characterized by: The first delivery pipeline (6) is also connected to a second delivery pipeline (62), and one end of the second delivery pipeline (62) is in communication with an external flare combustion structure (7).

7. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 6 is characterized by: The methane suction main pipe (32), the first delivery pipe (6) and the second delivery pipe (62) are all provided with a one-way valve (8).

8. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 7 is characterized by: A pressure transmitter is also provided on one end of the first delivery pipeline (6) close to the gas cabinet (2).

9. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 1 is characterized by: A sealing cover (9) is arranged outside the anaerobic tank (1).

10. The methane traceability and resource recovery system of landfill leachate anaerobic tank according to claim 2, characterized in that: The fastening assembly comprises a plurality of fastening arc sleeves (5) sleeved on the methane extraction branch pipe (31), and fastening blocks (51) are provided at both ends of the fastening arc sleeve (5), and the two fastening blocks (51) are connected to the top wall inside the anaerobic tank (1) through fastening bolts (52).

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