Natural gas hydrogen doping experimental device

Abstract

The utility model provides a natural gas hydrogen doping experimental device, which comprises a pressure regulating device and an experimental device which are connected, the pressure regulating device comprises a gas pipeline, a hydrogen pipeline and a mixer, a first pressure regulating valve is arranged between a gas source and the mixer, and a second pressure regulating valve is arranged between a hydrogen source and the mixer; the experimental equipment is located in the first space, the first space is provided with a first detector, the first detector is used for detecting whether leaked fuel gas and / or hydrogen exist in the first space or not, and the first detector is connected with the alarm. The first pressure regulating valve and the second pressure regulating valve of the natural gas hydrogen doping experimental device can regulate the volume concentration of hydrogen and natural gas in the mixed gas conveyed to the experimental equipment, so that the gas consumption data of the experimental equipment is tested, and the operation parameters of the pressure regulating equipment and the experimental equipment are regulated according to the gas consumption data; and the first detector in the first space can detect gas leakage, so that a safe and reliable platform for research and experiment is provided for hydrogen-doped natural gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of combustible gas experimental devices, in particular to a natural gas hydrogen blending experimental device. Background Art

[0002] Hydrogen is widely distributed in the universe, and it constitutes 75% of the mass of the universe. Hydrogen energy is the energy released by hydrogen (H) during physical and chemical changes. The product of hydrogen combustion is water, which is the cleanest energy in the world. Hydrogen energy is a secondary energy source with abundant sources, green and low carbon, and wide applications. It is gradually becoming one of the important carriers of global energy transformation and development. At present, hydrogen is mainly used as an important industrial raw material, but in the process of energy transformation, hydrogen is more important as a clean energy and a good energy carrier. It has the characteristics of cleanness, efficiency, energy storage, transportation, and rich application scenarios. Hydrogen energy is an important path to help the country achieve the goals of carbon peak and carbon neutrality. It is of great significance to deepen the revolution in energy production and consumption and build a clean, low-carbon, safe and efficient energy system.

[0003] Hydrogen has always been a bottleneck problem restricting the rapid development of hydrogen energy due to its low volume density, difficulty in liquefaction, and low efficiency of high-pressure gas transportation. At present, the pure hydrogen transportation pipelines that have been built in my country are not sufficient for large-scale transportation, but my country has a relatively complete natural gas long-distance pipeline network and urban gas pipeline network. By utilizing the existing natural gas pipeline network and implementing natural gas blending and transportation, the transportation problem of hydrogen can be solved in stages.

[0004] Natural gas blended with hydrogen for transportation refers to injecting a certain proportion of hydrogen into natural gas to form a mixed gas (HCNG), which is then transported to end users through natural gas pipelines, and then used directly or separately after the hydrogen is purified. For the hydrogen energy industry, blending hydrogen into natural gas pipelines for transportation will help break through the bottleneck of hydrogen transportation in the short term, and can also expand the application field and scale of hydrogen. For the natural gas industry, hydrogen-blended natural gas can use hydrogen to replace a portion of natural gas consumption. If calculated based on a 10% hydrogen blending ratio, it is estimated that 10 billion m3 can be replaced annually. 3 Natural gas can alleviate the tight supply of natural gas to a certain extent. More importantly, compared with pure natural gas, hydrogen-blended natural gas is a cleaner and lower-carbon fuel that can reduce the carbon emission level of terminal energy use. Natural gas blended with hydrogen can increase the proportion of hydrogen in energy, reduce dependence on traditional fossil fuels, reduce carbon emissions, and help expand the demand for hydrogen, reduce the cost of long-distance transportation of hydrogen, and reduce the cost of hydrogen production through scale. This provides new ideas for the development of the hydrogen energy industry and is of great significance to the promotion of hydrogen energy in transportation, construction, manufacturing, electricity and other fields.

[0005] The technology of natural gas blending with hydrogen has been included in the "Medium- and Long-Term Plan for the Development of the Hydrogen Energy Industry (2021-2035)", but no relevant research and experiments have been carried out on the direct application of natural gas blended with hydrogen in the civilian field. Summary of the invention

[0006] The technical problem to be solved by the utility model is to provide a natural gas hydrogen blending experimental device, aiming to provide a safe and reliable platform for research and experiment of hydrogen blended natural gas.

[0007] In order to solve the above technical problems, on the one hand, the utility model provides a natural gas hydrogen blending experimental device, which includes a connected pressure regulating device and an experimental device;

[0008] The pressure regulating device comprises a gas pipeline, a hydrogen pipeline and a mixer, one end of the gas pipeline and one end of the hydrogen pipeline are respectively connected to one end of the mixer, the other end of the gas pipeline is connected to a gas source, the hydrogen pipeline is connected to the hydrogen source, a first pressure regulating valve is provided on the pipeline between the gas source and the mixer, and a second pressure regulating valve is provided on the pipeline between the hydrogen source and the mixer;

[0009] The experimental equipment includes at least one gas-using device, and the gas-using device is connected to the mixer, and a first control valve is provided between the gas-using device and the mixer. The experimental equipment is located in a first space, and the first space is provided with a first detector, and the first detector is used to detect whether there is leakage of fuel gas and / or hydrogen in the first space, and the first detector is connected to an alarm.

[0010] Furthermore, the pressure regulating device is provided with a gas direct pipeline, one end of the gas direct pipeline is connected to the gas pipeline, and the other end is connected to the experimental equipment, and the gas direct pipeline is provided with a third pressure regulating valve.

[0011] Furthermore, the gas direct pipeline is provided with a first pressure gauge, a first gas meter and a second control valve, the second control valve is arranged between the first gas meter and the experimental equipment, and the first pressure gauge is arranged between the third pressure regulating valve and the first gas meter.

[0012] Furthermore, there are multiple first gas meters, and the multiple first gas meters are arranged in parallel, and each parallel pipeline is provided with a third control valve.

[0013] Furthermore, a second pressure gauge is provided between the third pressure regulating valve and the gas source; and / or

[0014] The natural gas hydrogen blending experimental device is provided with a first leak detection pipeline, one end of the first leak detection pipeline is connected to the gas straight pipeline, and the other end is connected to the first space where the experimental equipment is located, and the first leak detection pipeline is provided with a fourth control valve; and / or

[0015] A first one-way valve is provided on the pipeline between the second control valve and the first gas meter.

[0016] Furthermore, the hydrogen pipeline is provided with a first sub-pipeline and a second sub-pipeline at one end close to the mixer, the first sub-pipeline is connected to the mixer, the second sub-pipeline is connected to the experimental equipment, and the first sub-pipeline is provided with a fifth control valve, and the second sub-pipeline is provided with a sixth control valve.

[0017] Furthermore, a second gas meter is provided between the mixer and the experimental equipment, one end of the second sub-pipeline is connected to the hydrogen pipeline, and the other end is connected to the second gas meter;

[0018] A first control valve is provided on the pipeline between the second gas meter and the experimental equipment.

[0019] Furthermore, there are multiple second gas meters, and the multiple second gas meters are arranged in parallel, and each parallel pipeline is provided with a seventh control valve.

[0020] Further, a third pressure gauge is provided in the pipeline between the first pressure regulating valve and the mixer; and / or

[0021] The natural gas hydrogen blending experimental device is provided with a second leak detection pipeline, one end of the second leak detection pipeline is connected to the mixer, and the other end is connected to the first space where the experimental equipment is located, and the second leak detection pipeline is provided with an eighth control valve; and / or

[0022] A second one-way valve is provided in the pipeline between the first control valve and the second gas meter; and / or

[0023] A fourth pressure gauge is provided on the pipeline between the second pressure regulating valve and the hydrogen source, and a fifth pressure gauge is provided on the pipeline between the second pressure regulating valve and the mixer.

[0024] The utility model discloses a natural gas hydrogen blending experimental device, which comprises connected pressure regulating equipment and experimental equipment. The pressure regulating equipment comprises a gas pipeline, a hydrogen pipeline and a mixer. One end of the gas pipeline and one end of the hydrogen pipeline are respectively connected to one end of the mixer, the other end of the gas pipeline is connected to a gas source, the hydrogen pipeline is connected to the hydrogen source, a first pressure regulating valve is arranged between the gas source and the mixer, and a second pressure regulating valve is arranged between the hydrogen source and the mixer; the experimental equipment comprises at least one gas-using equipment, and the gas-using equipment is connected to the mixer, and a first control valve is arranged between the gas-using equipment and the mixer, the experimental equipment is located in a first space, and a first detector is arranged in the first space, the first detector is used to detect whether there is leakage of gas and / or hydrogen in the first space, and the first detector is connected to an alarm. The first pressure regulating valve and the second pressure regulating valve of the natural gas hydrogen blending experimental device of the utility model can adjust the volume concentration of hydrogen and natural gas in the mixed gas delivered to the experimental equipment, so as to test the gas usage data of the experimental equipment, and then adjust the operating parameters of the pressure regulating equipment and the experimental equipment according to the gas usage data, and the first detector in the first space can detect gas leakage, thereby providing a safe and reliable platform for research and experimentation of hydrogen blended natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a natural gas hydrogen blending experimental device in one embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the overall structure of a natural gas hydrogen blending experimental device in another embodiment of the utility model;

[0027] Figure 3 This is a flow chart of a natural gas hydrogen blending experimental method in one embodiment of the utility model.

[0028] In the attached drawings, the reference numerals represent: 1. first gas alarm; 2. first hydrogen alarm; 3. fourth control valve; 4. natural gas leak port; 5. second gas alarm; 6. third gas alarm; 7. second hydrogen alarm; 8. third hydrogen alarm; 9. temperature sensor; 11. second pressure gauge; 12. third pressure regulating valve; 13. first pressure gauge; 14. third control valve; 15. first gas meter; 16. first non-return valve; 17. second control valve; 18. first gas stove; 19. first water heater; 20. first wall-mounted boiler; 21. first fuel cell cogeneration system; 22. first pressure regulating valve; 23. third pressure gauge; 24. mixer; 25. Seventh control valve; 26. Second gas meter; 27. Second non-return valve; 28. First control valve; 29. ​​Tenth control valve; 30. Second gas stove; 31. Second water heater; 32. Second wall-mounted boiler; 33. Second fuel cell cogeneration system; 34. Fourth pressure gauge; 35. Second pressure regulating valve; 36. Fifth pressure gauge; 37. Hydrogen tank; 38. Fifth control valve; 39. Sixth control valve; 40. Eighth control valve; 41. Gas leakage port; 100. Gas pipeline; 200. Hydrogen pipeline; 300. Gas direct pipeline; 400. First sub-pipeline; 500. Second sub-pipeline; 600. First leak detection pipeline; 700. Second leak detection pipeline. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Compared with pure natural gas, hydrogen-blended natural gas is a cleaner, low-carbon fuel that can reduce the carbon emission level of terminal energy use. Natural gas blended with hydrogen can increase the proportion of hydrogen in energy, reduce dependence on traditional fossil fuels, reduce carbon emissions, and help expand hydrogen demand, reduce the cost of long-distance hydrogen transportation, and reduce hydrogen production costs through scale. This provides new ideas for the development of the hydrogen energy industry and is of great significance to the promotion of hydrogen energy in transportation, construction, manufacturing, electricity and other fields.

[0033] The technology of natural gas blending with hydrogen has been included in the "Medium- and Long-Term Plan for the Development of the Hydrogen Energy Industry (2021-2035)", but no relevant research and experiments have been carried out on the direct application of natural gas blended with hydrogen in the civilian field.

[0034] In view of the above technical problems, the utility model provides a natural gas hydrogen blending experimental device, aiming to provide a safe and reliable platform for research and experimentation of hydrogen blended natural gas.

[0035] As attached Figure 1 , which is a schematic diagram of the overall structure of a natural gas hydrogen blending experimental device in one embodiment of the utility model. As can be seen from the figure, the natural gas hydrogen blending experimental device includes a connected pressure regulating device and experimental equipment.

[0036] The pressure regulating device includes a gas pipeline 100, a hydrogen pipeline 200 and a mixer 24. One end of the gas pipeline 100 and one end of the hydrogen pipeline 200 are respectively connected to one end of the mixer 24. The other end of the gas pipeline 100 is connected to a gas source. The hydrogen pipeline 200 is connected to the hydrogen source. The pipeline between the gas source and the mixer 24 is provided with a first pressure regulating valve 22. The pipeline between the hydrogen source and the mixer 24 is provided with a second pressure regulating valve 35. The gas source is used to provide natural gas, which can be a natural gas tank or a connected municipal natural gas pipeline. The hydrogen source is used to provide hydrogen, which can be a hydrogen tank 37 or a connected municipal hydrogen pipeline. The first pressure regulating valve 22 is used to adjust the volume concentration of the natural gas entering the mixer 24, and the second pressure regulating valve 35 is used to adjust the volume concentration of the hydrogen entering the mixer 24. The mixer 24 mixes the natural gas and the hydrogen so that the hydrogen and the natural gas in the gas discharged from the mixer 24 are evenly mixed.

[0037] The experimental equipment includes at least one gas-using device, and the gas-using device is connected to the mixer 24, and a first control valve 28 is provided between the gas-using device and the mixer 24. The experimental equipment is located in the first space, and the first space is provided with a first detector, the first detector is used to detect whether there is leakage of gas and / or hydrogen in the first space, and the first detector is connected to the alarm. Gas-using devices include gas stoves, gas water heaters, gas wall-mounted boilers, fuel cell cogeneration systems and other devices that use natural gas and / or hydrogen. The experimental equipment burns mixed gas during use, and the experimental equipment can be used to conduct experiments to detect the gas usage data of the experimental equipment under the condition of different volume concentrations of natural gas and hydrogen in the mixed gas, and the gas usage data includes combustion heat, gas volume at the same combustion heat, combustion completeness, etc. The first control valve 28 is used to control the delivery of mixed gas to the experimental equipment. The first space is a relatively closed space, which can be a simulated kitchen space of a house where a user's family lives, so that the first detector can detect the concentration of gas leakage, so that the alarm can alarm to prompt gas leakage. The first detector detects whether the volume concentration of natural gas exceeds the first volume concentration, and the alarm will alarm if it exceeds the first preset volume concentration. Similarly, the first detector detects whether the volume concentration of hydrogen exceeds the second volume concentration, and the alarm sounds if it exceeds the second preset volume concentration.

[0038] The alarms located in the first space include a second gas alarm 5, a third gas alarm 6, a second hydrogen alarm 7, and a third hydrogen alarm 8. The first detector also includes a temperature sensor 9 for detecting the temperature of the first space to determine whether a fire occurs in the first space. The experimental equipment connected to the mixer 24 includes a second gas stove 30, a second water heater 31, a second wall-mounted boiler 32, and a second fuel cell cogeneration system 33.

[0039] The natural gas hydrogen blending experimental device in the above embodiment can be used for natural gas hydrogen blending experiments and for detecting gas usage data of experimental equipment when natural gas and hydrogen are mixed at different volume concentrations. It can also ensure that gas leakage can be detected and an alarm can be issued when gas leakage occurs, thereby ensuring the safety of the experiment.

[0040] As attached Figure 2As shown, in some embodiments of the utility model, the pressure regulating device is provided with a gas direct pipeline 300, one end of the gas direct pipeline 300 is connected to the gas pipeline, and the other end is connected to the experimental equipment, and the gas direct pipeline 300 is provided with a third pressure regulating valve 12. The gas direct pipeline 300 can directly connect the gas source and the experimental equipment to provide the experimental equipment with 100% volume concentration of natural gas. It can be understood that the experimental equipment includes a gas stove that burns natural gas, a gas water heater, a gas wall-mounted boiler, and a fuel cell cogeneration system. At this time, the direct gas pipeline is connected to the gas stove that burns natural gas, the gas water heater, the gas wall-mounted boiler, and the fuel cell cogeneration system, etc., for detecting the gas consumption data of the experimental equipment when burning pure natural gas. The third pressure regulating valve 12 is used to control the gas flow rate of the gas direct pipeline 300 to deliver natural gas to the experimental equipment. For example, when the third pressure regulating valve 12 is fully opened, the gas flow rate of the gas direct pipeline 300 for delivering natural gas to the experimental equipment reaches the maximum; when the third pressure regulating valve 12 is adjusted to a half-open position, the gas flow rate of the gas direct pipeline 300 for delivering natural gas to the experimental equipment reaches half of the maximum; when the third pressure regulating valve 12 is closed, the gas direct pipeline 300 stops delivering natural gas to the experimental equipment.

[0041] The experimental equipment located in the first space and connected to the gas direct pipeline 300 includes a first gas stove 18, a first water heater 19, a first wall-mounted boiler 20, and a first fuel cell cogeneration system 21. The first gas stove 18, the first water heater 19, the first wall-mounted boiler 20, and the first fuel cell cogeneration system 21 mainly burn natural gas. The end of the gas direct pipeline 300 close to the experimental equipment is connected to the pipeline at the rear end of the mixer 24, and the connected pipeline is provided with a tenth control valve 29, which is used to control the connection between the gas direct pipeline 300 and the second gas stove 30, the second water heater 31, the second wall-mounted boiler 32, and the second fuel cell cogeneration system 33.

[0042] As attached Figure 2 As shown, in some embodiments of the utility model, the gas direct pipeline 300 is provided with a first pressure gauge 13, a first gas meter 15 and a second control valve 17, the second control valve 17 is arranged between the first gas meter 15 and the experimental equipment, and the first pressure gauge 13 is arranged in the pipeline between the third pressure regulating valve 12 and the first gas meter 15. The first pressure gauge 13 is used to detect the gas pressure of the natural gas delivered to the gas direct pipeline 300, and the first gas meter 15 is used to detect the volume of the natural gas delivered to the experimental equipment by the gas direct pipeline 300. The second control valve 17 is used to control whether the gas direct pipeline 300 delivers natural gas to the experimental equipment, for example, when the second control valve 17 is opened, the gas direct pipeline 300 delivers natural gas to the experimental equipment; when the second control valve 17 is closed, the gas direct pipeline 300 stops delivering natural gas to the experimental equipment.

[0043] As attached Figure 2 As shown, in some embodiments of the utility model, there are multiple first gas meters 15, and the multiple first gas meters 15 are arranged in parallel, and each parallel pipeline is provided with a third control valve 14. The multiple first gas meters 15 are smart gas meters of different manufacturers or models, and the metering test of smart natural gas meters of different manufacturers or models can be realized. The third control valve 14 controls the natural gas of the gas direct pipeline 300 to pass through any one of the multiple first gas meters 15, that is, in the parallel pipeline, the pipeline with the third control valve 14 opened will have natural gas passing through, and the pipeline with the third control valve 14 closed will not have natural gas passing through.

[0044] As attached Figure 2 As shown, in some embodiments of the utility model, a first non-return valve 16 is provided in the pipeline between the second control valve 17 and the first gas meter 15. The second control valve 17 controls the natural gas in the parallel pipeline to be delivered to the experimental equipment. The third control valve 14 and the second control valve 17 on both sides of the first gas meter 15 are both opened, and the natural gas in the gas direct pipeline 300 is delivered to the experimental equipment. The first non-return valve 16 restricts the natural gas to flow only from the parallel pipeline to the experimental equipment, preventing the natural gas flowing to the experimental equipment from flowing back, which affects the measurement of the natural gas flowing to the experimental equipment by the first natural gas meter.

[0045] In some embodiments of the present invention, a second pressure gauge 11 is provided between the third pressure regulating valve 12 and the gas source. The second pressure gauge 11 is used to detect the gas pressure when the gas is input into the third pressure regulating valve 12. The first pressure gauge 13 is used to detect the gas pressure output from the third pressure regulating valve 12, thereby detecting the pressure regulating capacity of the third pressure regulating valve 12.

[0046] In some embodiments of the utility model, the natural gas hydrogen blending experimental device is provided with a first leak detection pipeline 600, one end of the first leak detection pipeline 600 is connected to the gas direct pipeline 300, and the other end is connected to the first space where the experimental equipment is located, and the first leak detection pipeline 600 is provided with a fourth control valve 3. The first leak detection pipeline 600 is provided with a natural gas leakage port 4, and the natural gas leakage port 4 is located in the first space. The first leak detection pipeline 600 can directly transport natural gas to the first space, detect the detection data of the first detector in the first space, and determine whether the first detector can detect the natural gas leakage. The fourth control valve 3 is used to control whether the first leak detection pipeline 600 transports natural gas to the first space. For example, when the fourth control valve 3 is opened, the first leak detection pipeline 600 transports natural gas to the first space; when the fourth control valve 3 is closed, the first leak detection pipeline 600 stops transporting natural gas to the first space.

[0047] As attached Figure 2As shown, in some embodiments of the present invention, a first sub-pipeline 400 and a second sub-pipeline 500 are provided at one end of the hydrogen pipeline 200 close to the mixer 24, the first sub-pipeline 400 is connected to the mixer 24, the second sub-pipeline 500 is connected to the experimental equipment, and the first sub-pipeline 400 is provided with a fifth control valve 38, and the second sub-pipeline 500 is provided with a sixth control valve 39. When the fifth control valve 38 is opened and the sixth control valve 39 is closed, the hydrogen in the hydrogen pipeline 200 flows to the mixer 24; when the fifth control valve 38 is closed and the sixth control valve 39 is opened, the hydrogen in the hydrogen pipeline 200 flows directly to the experimental equipment.

[0048] As attached Figure 2 As shown, in some embodiments of the utility model, a second gas meter 26 is provided between the mixer 24 and the experimental equipment, one end of the second sub-pipeline 500 is connected to the hydrogen pipeline 200, and the other end is connected to the second gas meter 26. The second natural gas meter is used to detect the volume of the gas delivered from the mixer 24 to the experimental equipment. A first control valve 28 is provided on the pipeline between the second gas meter 26 and the experimental equipment, and the first control valve 28 is used to control the gas flowing from the second gas meter 26 to the experimental equipment. When the first control valve 28 is closed, the gas passing through the second gas meter 26 stops being delivered to the experimental equipment; when the first control valve 28 is opened, the gas passing through the second gas meter 26 flows to the experimental equipment.

[0049] In some embodiments of the present invention, one end of the second sub-pipeline 500 is connected to the hydrogen pipeline 200 , and the other end is connected to the second gas meter 26 . The second gas meter 26 can measure the volume of gas passing through the second sub-pipeline 500 .

[0050] In some embodiments of the utility model, there are multiple second gas meters 26, and multiple second gas meters 26 are arranged in parallel, and each parallel pipeline is provided with a seventh control valve 25. Multiple second gas meters 26 are smart gas meters of different manufacturers or models, which can realize the metering test of smart natural gas hydrogen blending meters and hydrogen of different manufacturers or models. The seventh control valve 25 controls the gas of the first sub-pipeline 400 or the second sub-pipeline 500 to pass through any one of the multiple second gas meters 26, that is, in the parallel pipelines, the pipeline with the seventh control valve 25 opened will have gas passing through, and the pipeline with the seventh control valve 25 closed will not have gas passing through.

[0051] As attached Figure 2 As shown, in some embodiments of the utility model, a third pressure gauge 23 is provided in the pipeline between the first pressure regulating valve 22 and the mixer 24. The third pressure gauge 23 is used to detect the gas pressure of the gas pipeline 100 before the input mixer 24 and after the first pressure regulating valve 22, and can test the ability of the first pressure regulating valve 22 to regulate the pipeline gas pressure.

[0052] As attached Figure 2 As shown, in some embodiments of the utility model, the natural gas hydrogen blending experimental device is provided with a second leak detection pipeline 700, one end of the second leak detection pipeline 700 is connected to the mixer 24, and the other end is connected to the first space where the experimental device is located, and the second leak detection pipeline 700 is provided with an eighth control valve 40. The second leak detection pipeline 700 is provided with a gas leakage port 41, and the gas leakage port 41 is located in the first space. The second leak detection pipeline 700 can directly transport gas to the first space, detect the detection data of the first detector in the first space, and determine whether the first detector can detect the leakage of natural gas and / or hydrogen. The eighth control valve 40 is used to control whether the second leak detection pipeline 700 transports gas to the first space. For example, when the eighth control valve 40 is opened, the second leak detection pipeline 700 transports gas to the first space; when the eighth control valve 40 is closed, the second leak detection pipeline 700 stops transporting gas to the first space.

[0053] In some embodiments of the utility model, a second one-way valve 27 is provided in the pipeline between the first control valve 28 and the second gas meter 26. The first control valve 28 controls the gas in the parallel pipeline to be delivered to the experimental equipment. The first control valve 28 and the seventh control valve 25 on both sides of the second gas meter 26 are both opened, and the gas in the parallel pipeline is delivered to the experimental equipment. The second one-way valve 27 limits the gas to flow only from the parallel pipeline to the experimental equipment, preventing the natural gas flowing to the experimental equipment from flowing back, affecting the second natural gas meter to measure the gas flowing to the experimental equipment, which includes a mixture of hydrogen and natural gas, and hydrogen. When the first pressure regulating valve 22 and the third pressure regulating valve 12 are closed and the second pressure regulating valve 35 is opened, the gas flowing from the pressure regulating device to the experimental equipment is hydrogen. When the first pressure regulating valve 22 and the second pressure regulating valve 35 are opened and the third pressure regulating valve 12 is closed, the gas flowing from the pressure regulating device to the experimental equipment is a mixture of hydrogen and natural gas. When the first pressure regulating valve 22 and the second pressure regulating valve 35 are closed and the third pressure regulating valve 12 is opened, the gas flowing from the pressure regulating device to the experimental equipment is natural gas.

[0054] As attached Figure 2 As shown, in some embodiments of the present invention, a fourth pressure gauge 34 is provided on the pipeline between the second pressure regulating valve 35 and the hydrogen source, and a fifth pressure gauge 36 is provided on the pipeline between the second pressure regulating valve 35 and the mixer 24. The fourth pressure gauge 34 is used to detect the pressure of the hydrogen flowing to the second pressure regulating valve 35, and the fifth pressure gauge 36 detects the gas pressure flowing from the second pressure regulating valve 35 to the mixer 24 or the experimental equipment. By detecting the gas pressure of the pipelines before and after the second pressure regulating valve 35, the pressure regulating capacity of the second pressure regulating valve 35 can be detected.

[0055] In some embodiments of the utility model, the pressure regulating device is located in the second space, and the second space is provided with a second detector, and the second detector is used to detect whether there is leakage of gas and / or hydrogen in the second space, and the second detector is connected to the alarm. The pressure regulating device is located in the second space, and the second space is a relatively closed space. When there is leakage of natural gas and / or hydrogen in the second space, there is no air flowing into the second space from the outside, and the leakage of natural gas and / or hydrogen can be detected more easily. The alarm located in the second space includes a first gas alarm 1 and a first hydrogen alarm 2. The gas alarm and the hydrogen alarm have different alarm sounds or flashing colors.

[0056] As attached Figure 3 As shown, the embodiment of the utility model also provides a natural gas hydrogen blending experimental method, which is applied to the natural gas hydrogen blending experimental device as described in any one of the above embodiments, and the method includes:

[0057] S101: Supply the first gas to the experimental equipment for use.

[0058] The pressure regulating device transmits the first gas to the experimental equipment, which is a gas stove, a gas water heater, a gas wall-mounted boiler, and a fuel cell cogeneration system that use the first gas. During the experiment, gas stoves, gas water heaters, gas wall-mounted boilers, and fuel cell cogeneration systems of different models and manufacturers can be replaced to test the gas consumption data of gas stoves, gas water heaters, gas wall-mounted boilers, and fuel cell cogeneration systems of different models and manufacturers.

[0059] S102: When the experimental equipment uses the first gas, the volume concentration of hydrogen in the first gas is adjusted, and the gas usage data of the experimental equipment is recorded.

[0060] Specifically, when the first pressure regulating valve 22 and the third pressure regulating valve 12 are closed, and the second pressure regulating valve 35 is opened, the gas flowing from the pressure regulating device to the experimental device is hydrogen. When the first pressure regulating valve 22 and the second pressure regulating valve 35 are opened, and the third pressure regulating valve 12 is closed, the gas flowing from the pressure regulating device to the experimental device is a mixed gas of hydrogen and natural gas. By controlling the opening degree of the first pressure regulating valve 22 and the second pressure regulating valve 35, the volume concentration of hydrogen and natural gas in the first gas can be adjusted. When the first pressure regulating valve 22 and the second pressure regulating valve 35 are closed, and the third pressure regulating valve 12 is opened, the gas flowing from the pressure regulating device to the experimental device is natural gas.

[0061] S103: Adjust the operating parameters of the pressure regulating equipment and the experimental equipment according to the gas usage data.

[0062] The first gas is a mixture of hydrogen and natural gas with a volume concentration of 1% to 99%, hydrogen with a volume concentration of 100%, or natural gas with a volume concentration of 100%. By adjusting the volume concentration of hydrogen and natural gas in the first gas, the specific volume concentration of hydrogen and natural gas in the first gas can be tested when the gas usage data is good.

[0063] In some embodiments of the utility model, the natural gas hydrogen blending experimental device is provided with a first leak detection pipeline 600 and / or a second leak detection pipeline 700, one end of the first leak detection pipeline 600 and / or the second leak detection pipeline 700 is connected to the gas straight pipeline 300, and the other end is connected to the first space where the experimental equipment is located, the first leak detection pipeline 600 is provided with a fourth control valve 3 and / or the second leak detection pipeline 700 is provided with an eighth control valve 40, and the method includes:

[0064] S201: delivering a first preset volume of the first gas to the first space through the first leak detection pipeline 600 and / or the second leak detection pipeline 700.

[0065] S203: Observe whether the alarm in the first space sounds, and if not, adjust the operating parameters of the first detector.

[0066] Whether the detection alarm sounds can determine whether the detection of the first detector is accurate. If the alarm does not sound, it means that the detection of the first detector is inaccurate, and the operating parameters of the first detector need to be adjusted to improve the detection accuracy of the first detector.

[0067] In some embodiments of the utility model, the pressure regulating device is located in the second space, the second space is provided with a second detector, the second detector is used to detect whether there is leakage of gas and / or hydrogen in the second space, the second detector is connected to an alarm, and the method includes:

[0068] S301: When the experimental equipment uses the first gas, the concentration of the first gas in the second space is monitored.

[0069] S302: If the volume concentration of the first gas in the second space exceeds a preset volume concentration, an alarm in the second space sounds an alarm.

[0070] Similarly, the alarm is used to indicate whether there is gas leakage in the second space. If there is gas leakage, the staff is required to check the pressure regulating equipment in the second space.

[0071] The above steps S101-S103, S201-S202, and S301-S302 may be performed simultaneously or not simultaneously, and steps S101-S103, S201-S202, and S301-S302 do not interfere with each other.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A natural gas hydrogen blending experimental device, characterized in that: Including connected voltage regulating equipment and experimental equipment; The pressure regulating device comprises a gas pipeline, a hydrogen pipeline and a mixer, one end of the gas pipeline and one end of the hydrogen pipeline are respectively connected to one end of the mixer, the other end of the gas pipeline is connected to a gas source, the hydrogen pipeline is connected to a hydrogen source, a first pressure regulating valve is provided on the pipeline between the gas source and the mixer, and a second pressure regulating valve is provided on the pipeline between the hydrogen source and the mixer; The experimental equipment includes at least one gas-using device, and the gas-using device is connected to the mixer, and a first control valve is provided between the gas-using device and the mixer. The experimental equipment is located in a first space, and the first space is provided with a first detector, and the first detector is used to detect whether there is leakage of fuel gas and / or hydrogen in the first space, and the first detector is connected to an alarm.

2. The natural gas hydrogen blending experimental device according to claim 1, characterized in that: The pressure regulating device is provided with a gas direct pipeline, one end of the gas direct pipeline is connected to the gas pipeline, and the other end is connected to the experimental equipment, and the gas direct pipeline is provided with a third pressure regulating valve.

3. The natural gas hydrogen blending experimental device according to claim 2, characterized in that: The gas direct pipeline is provided with a first pressure gauge, a first gas meter and a second control valve, the second control valve is arranged between the first gas meter and the experimental equipment, and the first pressure gauge is arranged between the third pressure regulating valve and the first gas meter.

4. The natural gas hydrogen blending experimental device according to claim 3, characterized in that: There are multiple first gas meters, and the multiple first gas meters are arranged in parallel, and each parallel pipeline is provided with a third control valve.

5. The natural gas hydrogen blending experimental device according to claim 4, characterized in that: A second pressure gauge is provided between the third pressure regulating valve and the gas source; and / or The natural gas hydrogen blending experimental device is provided with a first leak detection pipeline, one end of the first leak detection pipeline is connected to the gas straight pipeline, and the other end is connected to the first space where the experimental equipment is located, and the first leak detection pipeline is provided with a fourth control valve; and / or A first one-way valve is provided on the pipeline between the second control valve and the first gas meter.

6. The natural gas hydrogen blending experimental device according to claim 1, characterized in that: The hydrogen pipeline is provided with a first sub-pipeline and a second sub-pipeline at one end close to the mixer, the first sub-pipeline is connected to the mixer, the second sub-pipeline is connected to the experimental equipment, the first sub-pipeline is provided with a fifth control valve, and the second sub-pipeline is provided with a sixth control valve.

7. The natural gas hydrogen blending experimental device according to claim 6, characterized in that: A second gas meter is provided between the mixer and the experimental equipment, one end of the second sub-pipeline is connected to the hydrogen pipeline, and the other end is connected to the second gas meter; The pipeline between the second gas meter and the experimental equipment is provided with the first control valve.

8. The natural gas hydrogen blending experimental device according to claim 7, characterized in that: There are multiple second gas meters, and the multiple second gas meters are arranged in parallel, and each parallel pipeline is provided with a seventh control valve.

9. The natural gas hydrogen blending experimental device according to claim 8, characterized in that: A third pressure gauge is provided on the pipeline between the first pressure regulating valve and the mixer; and / or The natural gas hydrogen blending experimental device is provided with a second leak detection pipeline, one end of the second leak detection pipeline is connected to the mixer, and the other end is connected to the first space where the experimental equipment is located, and the second leak detection pipeline is provided with an eighth control valve; and / or A second one-way valve is provided in the pipeline between the first control valve and the second gas meter; and / or A fourth pressure gauge is provided on the pipeline between the second pressure regulating valve and the hydrogen source, and a fifth pressure gauge is provided on the pipeline between the second pressure regulating valve and the mixer.

10. The natural gas hydrogen blending experimental device according to any one of claims 1 to 9, characterized in that: The pressure regulating device is located in the second space. The second space is provided with a second detector. The second detector is used to detect whether there is leakage of fuel gas and / or hydrogen in the second space. The second detector is connected to an alarm.

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