Methane emission monitoring and recycling device

Abstract

The utility model relates to the technical field of new energy, in particular to a methane emission monitoring and recycling device which comprises a gas flowmeter, a methane concentration detector, a controller, a power supply, a compressor, a purification device, a flow regulating valve, a stop valve, an adsorption type tank box and a methane adsorbent. According to the device, the methane concentration detector and the gas flowmeter are used for carrying out concentration and flowmeter measurement on methane emission gas, and the controller can realize remote data monitoring and analysis of methane emission. In order to recover discharged methane in real time, a methane adsorbent with a high specific surface area is filled in an adsorption type tank box, and methane gas molecules are adsorbed and stored at normal temperature and medium pressure by utilizing the huge inner surface area and the abundant micropore structure of the methane adsorbent. The device has the advantages of real-time performance and accuracy of methane emission data, high recovery efficiency, high applicability, wide application range and the like, and the emission amount of methane can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and particularly relates to a device for monitoring and recovering methane emissions. Background Technique

[0002] As the second largest greenhouse gas globally, methane has a very large global warming potential. Methane emissions are closely related to global climate change and have a profound and complex impact on the environment. Currently, the global methane emission situation is worrying. The increase in methane emissions will lead to a rise in global temperatures, which in turn will trigger a series of environmental problems such as extreme weather events, sea-level rise, and biodiversity decline. In addition, methane emissions also affect air quality, can cause an increase in ozone concentration, and pose a threat to human health and the ecosystem.

[0003] The sources of methane can be mainly divided into two categories: natural sources and anthropogenic sources. Natural sources include wetlands, swamps, forest fires, the digestive processes of wild animals, and methane hydrates on land and in the ocean. Anthropogenic sources involve agricultural activities (such as rice cultivation, livestock farming), waste treatment (such as anaerobic decomposition in landfills), and the extraction and use of fossil fuels (such as coal mining, leakage in oil and gas systems), etc. In response to the methane emission problem, the international community has adopted various control and emission reduction strategies. However, although the existing emission reduction measures have achieved certain results, in the face of the continuously increasing global methane emissions, there are still problems such as difficult emission monitoring and high difficulty in recovery and treatment.

[0004] To solve the problems of methane emission monitoring and recovery, a device for monitoring and recovering methane emissions is proposed. By analyzing the concentration and measuring the flow rate of the emitted gas, the analysis and processing of methane emission data can be realized. In order to recover the emitted methane in real time, an adsorption technology is adopted to adsorb the emitted methane. The adsorption technology uses the principle of physical adsorption, that is, methane molecules adhere to the inner surface of the micropores of the adsorbent through van der Waals forces, thereby increasing the storage density of methane. A special methane adsorbent with a high specific surface area is loaded into the storage tank, and its huge inner surface area and rich microporous structure are used to adsorb and store methane gas molecules under normal temperature and medium pressure. The recovered methane can be used as fuel. This device has the advantages of real-time and accurate methane emission data, high efficiency of methane recovery, strong applicability, and wide application range, etc., can effectively solve the problems of methane emission monitoring and recovery, and can be applied to fields such as biogas recovery, gas well testing in natural gas exploitation, BOG recovery of LNG heavy trucks, and emergency relief gas recovery in natural gas chemical plants. Therefore, it not only reduces environmental pollution but also saves energy, and has great economic and social benefits for reducing methane emissions. Content of the Utility Model

[0005] For the above purposes, the present utility model provides a device for monitoring and recovering methane emissions. By analyzing the concentration and measuring the flow rate of the emitted gas, the analysis and processing of methane emission data can be achieved. In order to recover the emitted methane in real time, a special methane adsorbent with a high specific surface area is loaded into the storage tank, and the methane gas molecules are adsorbed and stored under normal temperature and medium pressure by using its huge internal surface area and rich microporous structure. This device has the advantages of real-time and accurate methane emission data, high recovery efficiency, strong applicability and wide application range, and can effectively reduce the methane emissions.

[0006] A device for monitoring and recovering methane emissions includes a gas flow meter, a methane concentration detector, a controller, a power supply, a compressor, a purification device, a flow regulating valve, a cut-off valve, an adsorption tank and a methane adsorbent.

[0007] Further, the gas flow meter measures the flow rate of the emitted methane gas.

[0008] Further, the methane concentration detector analyzes the concentration of the emitted methane gas.

[0009] Further, the controller collects the methane concentration data of the infrared analyzer and the flow rate data of the gas flow meter, and sends the data to the cloud server for analysis and calculation through the data transmission module of the controller.

[0010] Further, the power supply obtains green energy jointly by using a wind turbine and a solar panel, supplies it to the battery for energy storage, and at the same time, the external power supply is used as supplementary power. The energy storage battery supplies power to the methane concentration detector, the gas flow meter and the controller.

[0011] Further, the compressor compresses the emitted methane gas to the rated adsorption pressure.

[0012] Further, the purification device includes a filter and a molecular sieve dehydrator to purify the moisture and impurities in the methane gas.

[0013] Further, the flow regulating valve adjusts the methane adsorption flow rate of the adsorption tank.

[0014] Further, the cut-off valve is used to cut off and open the methane gas entering the adsorption tank.

[0015] Further, the adsorption tank adsorbs the purified emitted methane gas through the adsorbent filled inside, and can be transported by a flatbed truck.

[0016] Further, the methane adsorbent is a nano-scale activated carbon adsorption material, which has the characteristics of large specific surface area, low-pressure adsorption, low-pressure storage and stable-pressure desorption.

[0017] Further, in an implementable solution of the present utility model, the gas flowmeter is installed inside the methane discharge pipe, and the methane concentration detector is installed at the end of the methane discharge pipe. The controller monitors the concentration and flow rate of the discharged methane gas in real time and transmits the data to the cloud server for analysis. The power supply ensures the power supply of the methane concentration detector, gas flowmeter and controller through the green electricity generated by the solar panel and wind power generation and the external power supply.

[0018] The methane gas in the methane discharge pipe is connected to the compressor through a pipeline. After the compressor compresses the methane gas, it enters the purification device. After the purification device filters out the moisture and impurities in the methane gas, it enters the flow control valve, cut-off valve and adsorption tank. The rated adsorption flow rate of the adsorption tank is automatically adjusted, and the adsorbent adsorbs the methane gas. When the adsorption flow rate of the adsorption tank reaches the rated adsorption storage capacity, the cut-off valve closes, and the cut-off valve of another group of adsorption tanks opens to continue adsorbing and recovering the methane gas.

[0019] Advantages of the present utility model:

[0020] In the present utility model, through the concentration analysis and flow measurement of the discharged gas, the analysis and processing of methane emission data can be realized. In order to recover the discharged methane in real time, a special methane adsorbent with a high specific surface area is loaded into the storage tank, and the methane gas molecules are adsorbed and stored under normal temperature and medium pressure by using its huge internal surface area and rich microporous structure. The device has the advantages of real-time and accurate methane emission data, high recovery efficiency, strong applicability and wide application range, and can effectively reduce the methane emission. Description of the drawings

[0021] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of a monitoring and recovery device for methane emissions. Specific embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will further describe the present utility model in detail with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this utility model should have the ordinary meanings understood by those with general skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0025] As Figure 1 shown, a methane emission monitoring and recovery device includes a gas flowmeter 01, a methane concentration detector 02, a controller 03, a power supply 04, a compressor 05, a purification device 06, a flow regulating valve 07, a cut-off valve 08, an adsorption tank 09 and a methane adsorbent 10.

[0026] The gas flowmeter 01 adopts an orifice plate structure and calculates the gas flow by measuring the pressure difference before and after the orifice plate.

[0027] The methane concentration detector 02 measures by the principle of infrared absorption spectroscopy and determines the methane concentration according to the absorption characteristics of methane molecules for infrared light of a specific wavelength.

[0028] The controller 03 uses Internet of Things technology to realize remote monitoring and data analysis of methane concentration data and gas flow data, improving the efficiency and response speed of methane emission data monitoring.

[0029] The power supply 04 uses a solar panel 0401 and a wind turbine 0402 to jointly obtain green energy, supply it to a battery for energy storage, and at the same time an external power supply 0403 is used as supplementary power. The energy storage battery supplies power to the gas flowmeter 01, the methane concentration detector 02 and the controller 03.

[0030] The compressor 05 adopts an oil-free piston compressor structure and compresses the discharged methane gas to the rated adsorption pressure.

[0031] The purification device 06 includes a filter and a molecular sieve dehydrator to remove moisture and impurities in the methane gas.

[0032] The flow regulating valve 07 adopts a pneumatic regulating valve structure to regulate the methane adsorption flow of the adsorption tank.

[0033] The cut-off valve 08 adopts a pneumatic globe valve structure to cut off and open the methane gas entering the adsorption tank container.

[0034] The adsorption tank container 09 adsorbs the purified discharged methane gas through the methane adsorbent 10 filled inside, and after being filled with methane, it can be transported by a flatbed truck.

[0035] The methane adsorbent 10 is a nano-scale activated carbon adsorption material, which has the characteristics of large specific surface area, low-pressure adsorption, low-pressure storage, and stable-pressure desorption.

[0036] In an implementable embodiment of the present utility model, the gas flowmeter 01 is installed inside the methane discharge pipe, the methane concentration detector 02 is installed at the end of the methane discharge pipe, and the controller 03 monitors the concentration and flow rate of the discharged methane gas in real time and transmits the data to the cloud server for analysis. The power supply 04 ensures the power supply of the gas flowmeter 01, the methane concentration detector 02, and the controller 03 through the green power generated by the solar panel 0401 and the wind turbine 0402 and the external power supply 0403.

[0037] The methane gas in the methane discharge pipe is connected to the compressor 05 through a pipeline. After the compressor 05 compresses the methane gas, it enters the purification device 06. After the purification device 06 filters out the moisture and impurities in the methane gas, it enters the flow control valve 07, the cut-off valve 08, and the adsorption tank container 09. The controller 03 automatically adjusts the fixed adsorption flow rate of the adsorption tank container 09 by collecting the parameter signal data (exhaust pressure, exhaust temperature, gas flow rate, adsorption pressure, etc.) of the compressor 05, the flow control valve 07, the cut-off valve 08, and the adsorption tank container 09, and the methane adsorbent 10 adsorbs the methane gas. When the adsorption flow rate of the adsorption tank container 0901 reaches the rated adsorption storage capacity, the cut-off valve 0801 closes, the cut-off valve 0802 opens, and it switches to another adsorption tank container 0902 to continue recovering and adsorbing methane gas.

[0038] The present utility model aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for monitoring and recovering methane emissions, characterized in that, It includes a gas flow meter (01), a methane concentration detector (02), a controller (03), a power supply (04), a compressor (05), a purification device (06), a flow regulating valve (07), a cut-off valve (08), an adsorption tank container (09) and a methane adsorbent (10); The gas flow meter (01) is installed inside the methane discharge pipe, the methane concentration detector (02) is installed at the end of the methane discharge pipe, and the methane discharge pipe is connected to the compressor (05), the compressor (05) is connected to the purification device (06), the purification device (06) is connected to the flow regulating valve (07), the flow regulating valve (07) is connected to the cut-off valve (08), and the cut-off valve (08) is connected to the adsorption tank container (09) through pipelines. The methane adsorbent (10) is filled inside the adsorption tank container (09); The power supply (04) is electrically connected to the gas flow meter (01), the methane concentration detector (02) and the controller (03); The gas flow meter (01), the methane concentration detector (02), the compressor (05), the flow regulating valve (07) and the cut-off valve (08) are respectively electrically connected to the controller (03).

2. The monitoring and recovery device for methane emissions according to claim 1, characterized in that, The gas flow meter (01) adopts an orifice plate structure and calculates the gas flow by measuring the pressure difference before and after the orifice plate.

3. The monitoring and recovery device for methane emissions according to claim 1, characterized in that, The methane concentration detector (02) is measured by the principle of infrared absorption spectroscopy, and the methane concentration is determined according to the absorption characteristics of methane molecules for infrared light with a specific wavelength.

4. A monitoring and recovery device for methane emissions according to claim 1, characterized in that, The controller (03) uses Internet of Things technology to realize remote monitoring and data analysis of methane concentration data and gas flow data, improving the efficiency and response speed of methane emission data monitoring.

5. The monitoring and recovery device for methane emissions according to claim 1, wherein The power supply (04) uses a solar panel (0401) and a wind turbine (0402) to jointly obtain green energy, which is supplied to a battery for energy storage. At the same time, an external power supply (0403) is used as supplementary power, and the energy storage battery supplies power to the gas flow meter (01), the methane concentration detector (02) and the controller (03).

6. The monitoring and recovery device for methane emissions according to claim 1, wherein The compressor (05) adopts an oil-free piston compressor structure and compresses the discharged methane gas to the rated adsorption pressure.

7. The monitoring and recovery device for methane emissions according to claim 1, wherein, The purification device (06) includes a filter (0601) and a molecular sieve dehydrator (0602) to remove moisture and impurities in the methane gas.

8. The monitoring and recovery device for methane emissions according to claim 1, characterized in that, The flow regulating valve (07) adopts a pneumatic regulating valve structure to regulate the methane adsorption flow.

9. The monitoring and recovery device for methane emissions according to claim 1, characterized in that, The cut-off valve (08) adopts a pneumatic globe valve structure to cut off and open the methane gas entering the adsorption tank container (09).

10. The monitoring and recovery device for methane emissions according to claim 1, characterized in that, The adsorption tank container (09) adsorbs the purified discharged methane gas through the methane adsorbent (10) filled inside. Its rated adsorption pressure is 4.0 MPa, and it can be transported by a flatbed truck after being filled with methane.

11. A monitoring and recovery device for methane emissions according to claim 1, characterized in that, The methane adsorbent (10) is a nano-scale activated carbon adsorption material, which has the characteristics of a large specific surface area, low-pressure adsorption, low-pressure storage and stable-pressure desorption.

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