Hydrogen-doped natural gas experiment method based on fuel gas micro-grid

Abstract

The invention discloses a hydrogen-doped natural gas experiment method based on a fuel gas micro-grid. The method comprises the following steps: providing hydrogen and natural gas; mixing the provided hydrogen and natural gas; compressing the mixed hydrogen and natural gas in a compression area; the compressed hydrogen and the compressed natural gas are respectively conveyed to an urban hydrogen doping experiment area and a terminal user experiment area; pressurizing the hydrogen-doped natural gas in the low-pressure experimental area to the high-pressure experimental area by using a compressor in the urban hydrogen-doped experimental area; the hydrogen-doped natural gas is used by equipment in a terminal user experiment area, and hydrogen is provided by a pure hydrogen pipeline, a hydrogen cylinder group or a hydrogen long pipe trailer; natural gas is provided by a natural gas pipeline, a CNG tank car or an LNG tank car, according to the overall design method of the natural gas hydrogen doping experiment system, the quality of the natural gas hydrogen doping experiment can be systematically improved from multiple aspects of gas source supply, hydrogen doping gas mixing, hydrogen doping flow, hydrogen doping conveying, hydrogen doping pressurization and terminal users, and the natural gas hydrogen doping experiment system has the advantages of being simple in structure, safe, stable and high in functionality.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas hydrogen blending, and particularly relates to an experimental method for hydrogen-blended natural gas based on a gas microgrid. Background Technique

[0002] Natural gas, as an important fossil fuel resource, mainly exists in underground rock formations and is formed through a long geological evolution. Its main component is methane, accounting for more than 80%. It also contains alkanes such as ethane, propane, and butane, as well as a small amount of non-hydrocarbon gases such as nitrogen, carbon dioxide, and hydrogen sulfide. With the improvement of living standards and the acceleration of the urbanization process, the demand for natural gas has increased sharply. Due to its clean, efficient, and environmentally friendly characteristics, natural gas is widely used in household heating, industrial heat, power generation, transportation, and chemical raw materials. Compared with traditional energy sources such as coal, natural gas produces fewer pollutants after combustion and has less impact on the environment. Therefore, it is regarded as one of the important directions for the future energy structure transformation.

[0003] In the context of the global response to climate change and China's goal of carbon neutrality, it is urgent to accelerate the green transformation of energy. Promoting the development of the hydrogen energy industry has become a hot topic in the industry. The natural gas hydrogen blending technology mixes hydrogen produced from renewable energy with natural gas and transports it to end-users through the natural gas pipeline network, realizing the utilization of hydrogen-blended natural gas at the terminal. Through natural gas hydrogen blending, hydrogen replaces part of the natural gas, reducing carbon emissions; making full use of industrial by-product hydrogen to ensure national energy security; using the existing gas pipeline for transportation to reduce the hydrogen storage and transportation cost. Due to the physical property differences between hydrogen and natural gas in terms of density, calorific value, diffusion characteristics, combustion characteristics, etc., in the face of the demand for transporting hydrogen-blended natural gas into households and achieving large-scale application, it is urgent to overcome technical problems in various aspects such as material inherent safety, transportation process, and key equipment, form common key technologies and demonstration applications, and it is imperative to conduct experiments on hydrogen-blended natural gas. Therefore, we need to provide an experimental method for hydrogen-blended natural gas based on a gas microgrid. Summary of the Invention

[0004] The purpose of the invention is to provide an experimental method for hydrogen-blended natural gas based on a gas microgrid and an overall design method for the natural gas hydrogen blending experimental system, which can systematically improve the quality of the natural gas hydrogen blending experiment from aspects such as gas source supply, hydrogen blending and mixing, hydrogen blending process, hydrogen blending transportation, hydrogen blending pressurization, and end-users, and has the advantages of simple structure, safety and stability, and strong functionality, so as to solve the problems in the existing technology mentioned in the above background technology that low utilization rate is often accompanied by reduced energy efficiency, and the inability to mix natural gas with hydrogen will limit the flexibility of energy.

[0005] To achieve the above purpose, the invention adopts the following technical scheme: An experimental method for hydrogen-blended natural gas based on a gas microgrid, characterized in that it includes the following steps:

[0006] Provide hydrogen and natural gas;

[0007] Mix the provided hydrogen and natural gas;

[0008] Compress the mixed hydrogen and natural gas in a compression area;

[0009] Respectively transport the compressed hydrogen and natural gas to an urban hydrogen-blended experiment area and an end-user experiment area;

[0010] Use a compressor in the urban hydrogen-blended experiment area to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area;

[0011] Use the hydrogen-blended natural gas by the equipment in the end-user experiment area.

[0012] Preferably, the providing of hydrogen and natural gas includes:

[0013] Provide hydrogen by a pure hydrogen pipeline, a hydrogen cylinder bank or a hydrogen tube trailer;

[0014] Provide natural gas by a natural gas pipeline, a CNG truck or an LNG truck.

[0015] Preferably, the mixing of the provided hydrogen and natural gas includes:

[0016] In the scenario corresponding to the conventional natural gas supply, the hydrogen ratio is 0% and the natural gas ratio is 100%.

[0017] Preferably, the mixing of the provided hydrogen and natural gas includes:

[0018] In the scenario corresponding to pure hydrogen, the hydrogen blending ratio is 100% and the natural gas ratio is 0%.

[0019] Preferably, the respectively transporting of the compressed hydrogen and natural gas to an urban hydrogen-blended experiment area and an end-user experiment area includes:

[0020] In the hydrogen-blended experiment area, introduce hydrogen through a hydrogen transport pipeline, and in the end-user experiment area, transport it to the end-user experiment area through a natural gas pipeline.

[0021] Preferably, the using of a compressor in the urban hydrogen-blended experiment area to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area includes:

[0022] Transport the hydrogen-blended natural gas at the outlet of the low-pressure experiment area into the compressor, the compressor compresses the hydrogen-blended natural gas, and the compressed hydrogen-blended natural gas is transported to the inlet of the high-pressure experiment area through an exhaust pipeline.

[0023] Preferably, the use of hydrogen - doped natural gas by the equipment in the end - user experimental area includes residential and commercial users and industrial users;

[0024] The residential and commercial users use hydrogen - doped natural gas through gas stoves, gas water heaters and gas wall - hung boilers;

[0025] The industrial users use hydrogen - doped natural gas through industrial boilers, gas turbines, gas internal combustion engines and industrial furnaces.

[0026] Preferably, the equipment is arranged outdoors, a cut - off valve is installed on the natural gas pipeline, and safety valves, vent valves and maintenance replacement valves are installed on the equipment and pipelines.

[0027] Preferably, it further includes a monitoring device for monitoring the equipment in the end - user experimental area. The monitoring device includes a combustible gas detector, a laser pan - tilt detector and a flame detector.

[0028] A hydrogen - doped natural gas experimental system based on a gas micro - grid for implementing the method according to any one of claims 1 - 9, comprising:

[0029] A gas source supply module for providing hydrogen and natural gas;

[0030] A hydrogen - doping mixing module for mixing the provided hydrogen and natural gas;

[0031] A hydrogen - doping process module for compressing the mixed hydrogen and natural gas in a compression area;

[0032] A hydrogen - doping transportation module for transporting the compressed hydrogen and natural gas to the urban hydrogen - doping experimental area and the end - user experimental area respectively;

[0033] A hydrogen - doping boosting module for boosting the hydrogen - doped natural gas in the low - pressure experimental area to the high - pressure experimental area by using a compressor in the urban hydrogen - doping experimental area;

[0034] A hydrogen - doping use module for the use of hydrogen - doped natural gas by the equipment in the end - user experimental area.

[0035] The technical effects and advantages of the present invention: A hydrogen - doped natural gas experimental method based on a gas micro - grid proposed by the present invention has the following advantages compared with the prior art:

[0036] Through the overall design method of the natural gas hydrogen - doping experimental system, the present invention can systematically improve the quality of the natural gas hydrogen - doping experiment in multiple aspects including gas source supply, hydrogen - doping mixing, hydrogen - doping process, hydrogen - doping transportation, hydrogen - doping boosting and end - users, and has the advantages of simple structure, safety and stability, and strong functionality.

[0037] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the specification and the drawings. Description of the Drawings

[0038] Figure 1 is a flowchart of the steps of the present invention;

[0039] Figure 2 is a process flowchart of the hydrogen-doped process of the present invention. Detailed Embodiments

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only for explaining the present invention, and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] As Figure 1 and Figure 2 shown, the present invention provides an experimental method for hydrogen-doped natural gas based on a gas microgrid, including the following steps:

[0042] Provide hydrogen and natural gas;

[0043] Mix the provided hydrogen and natural gas;

[0044] Compress the mixed hydrogen and natural gas in a compression area;

[0045] Respectively transport the compressed hydrogen and natural gas to the urban hydrogen-doped experimental area and the end-user experimental area;

[0046] Use a compressor in the urban hydrogen-doped experimental area to boost the hydrogen-doped natural gas in the low-pressure experimental area to the high-pressure experimental area;

[0047] Use the hydrogen-doped natural gas by the equipment in the end-user experimental area.

[0048] The providing of the hydrogen and natural gas includes:

[0049] The hydrogen is provided by a pure hydrogen pipeline, a hydrogen cylinder group or a hydrogen tube trailer;

[0050] The natural gas is provided by a natural gas pipeline, a CNG truck or an LNG truck;

[0051] Specifically, the gas source types cover the main supply methods of current hydrogen and natural gas, enabling the effective supply of natural gas and hydrogen, fully simulating the supply environment of natural gas and hydrogen. At low flow rates, the gas supply methods of hydrogen cylinder groups and natural gas cylinder groups can be considered. At high flow rates, the gas supply methods of hydrogen tube trailers, CNG tank trucks, and LNG tank trucks can be considered. The gas supply methods of pure hydrogen pipelines, hydrogen production from natural gas reforming, and natural gas pipelines also fully simulate the gas supply scenarios under stable gas sources.

[0052] The blending of the provided hydrogen and natural gas includes:

[0053] In the corresponding scenario of conventional natural gas supply, the hydrogen ratio is 0% and the natural gas ratio is 100%;

[0054] Specifically, hydrogen and natural gas are blended, and the hydrogen blending ratio is 0 - 100%, covering the entire operating conditions from natural gas, hydrogen-blended natural gas to hydrogen. When the hydrogen blending ratio is 0%, the outlet of the hydrogen-blended gas module is 100% natural gas. At this time, the corresponding scenario is conventional natural gas supply. Pure natural gas supply has many advantages such as rich resources, environmental protection advantages, economic efficiency, energy security, technical feasibility, wide application, reduction of greenhouse gas emissions, and promotion of energy transformation. These advantages make natural gas an ideal choice for clean energy, contributing to the optimization and sustainable development of the global energy structure.

[0055] The blending of the provided hydrogen and natural gas includes:

[0056] In the corresponding scenario of pure hydrogen, the hydrogen blending ratio is 100% and the natural gas ratio is 0%;

[0057] Specifically, when the hydrogen blending ratio is 100%, the outlet of the hydrogen-blended gas module is 100% hydrogen. At this time, the corresponding scenario is pure hydrogen. It provides conditions for the hydrogen blending experiment of town gas and the hydrogen blending experiment of end-users. The hydrogen blending ratio is adjusted between 0 - 100%, providing conditions for the downstream hydrogen blending experiment. Currently, the main hydrogen blending experiments in China are concentrated between 0 - 20%. This process can provide hydrogen-blended natural gas with a hydrogen blending ratio of 0% - 100%, providing conditions for the hydrogen blending experiment and the hydrogen applicability of equipment.

[0058] The transportation of the compressed hydrogen and natural gas to the town hydrogen blending experiment area and the end-user experiment area respectively includes:

[0059] In the hydrogen blending experiment area, hydrogen is introduced through the hydrogen transportation pipeline. In the end-user experiment area, it is transported to the end-user experiment area through the natural gas pipeline;

[0060] Specifically, after hydrogen and natural gas are blended, a compressor (one in use and one in reserve) is set in the compression area to compress the hydrogen-blended natural gas according to experimental requirements. The compressed natural gas enters the urban hydrogen-blended experimental area and the end-user experimental area respectively.

[0061] In the urban hydrogen-blended experimental area, according to the current "Code for Design of City Gas Engineering" (GB50028-2020), in accordance with the urban natural gas pressure class system, the hydrogen-blended natural gas is gradually depressurized and passes through high-pressure A (design pressure 4.0 MPa) - high-pressure B (design pressure 2.5 MPa) - sub-high-pressure A (design pressure 1.6 MPa) - medium pressure (design pressure 0.4 MPa) - low-pressure experimental area (design pressure 0.01 MPa) in turn for experiments respectively.

[0062] The use of a compressor by the urban hydrogen-blended experimental area to boost the hydrogen-blended natural gas in the low-pressure experimental area to the high-pressure experimental area includes:

[0063] The hydrogen-blended natural gas at the outlet of the low-pressure experimental area is transported into the compressor, and the compressor compresses the hydrogen-blended natural gas. The compressed hydrogen-blended natural gas is transported to the inlet of the high-pressure experimental area through the exhaust pipeline;

[0064] Specifically, a compressor is set to boost the low-pressure hydrogen-blended natural gas to high-pressure A (design pressure 4.0 MPa) and then return it to the inlet of the high-pressure A experimental area to realize the circulation of the hydrogen-blended natural gas. The hydrogen-blended natural gas in the loop flows, making the experimental environment close to the actual use conditions. According to the requirements of the hydrogen blending ratio, multiple hydrogen-blended natural gas loops can be set to conduct experiments simultaneously. The experimental loops with different hydrogen blending ratios are compared to effectively form research results.

[0065] The use of hydrogen-blended natural gas by the equipment in the end-user experimental area includes: residential and commercial users and industrial users;

[0066] The residential and commercial users use the hydrogen-blended natural gas through gas stoves, gas water heaters and gas wall-mounted boilers;

[0067] The industrial users use the hydrogen-blended natural gas through industrial boilers, gas turbines, gas internal combustion engines and industrial furnaces;

[0068] Specifically, in the end-user experimental area, the end-users are divided into residential and commercial users, industrial users, and fuel cells. The residential and commercial users are mainly gas stoves, gas water heaters, and gas wall-mounted boilers. The industrial users are mainly industrial boilers, gas turbines, gas internal combustion engines, and industrial furnaces. The fuel cells are mainly solid oxide fuel cells (SOFC). The above users cover all fields of existing natural gas users and can provide sufficient conditions for hydrogen blending experiments to demonstrate the characteristics of end-users under hydrogen blending conditions.

[0069] The equipment is arranged in the open air, the natural gas pipeline is equipped with a cut-off valve, and the equipment and pipeline are equipped with a safety valve, a vent valve, and a maintenance replacement valve;

[0070] Specifically, considering the characteristics of natural gas and hydrogen, the main equipment is arranged in the open air to avoid gas accumulation. Shut-off valves are installed on the natural gas and hydrogen inlet pipelines to achieve automatic shut-off in case of accidents. Instruments are centrally controlled, and operating parameters are automatically collected and remotely transmitted to the control center. Safety valves, vent valves, and maintenance replacement valves are installed on the equipment and pipelines. When the system is over-pressured, the safety valve will trip to release the pressure, and the released gas will be discharged centrally through the vent pipe; during startup, shutdown, and maintenance, nitrogen is connected through the maintenance replacement valve and vent valve to discharge and replace the hydrogen-blended natural gas in the equipment and pipelines.

[0071] The present invention also includes a monitoring device for monitoring the equipment in the end-user experimental area, wherein the monitoring device includes a combustible gas detector, a laser pan-tilt detector and a flame detector;

[0072] Specifically, static electricity release devices are installed at the entrances and exits of the experimental device area to eliminate static electricity. A combination of combustible gas detectors + laser pan-tilt detectors + flame detectors is used in the device area to monitor combustible gases. Combustible gas detectors are installed near equipment and pipelines to monitor combustible gases and sound an alarm when the concentration of combustible gases exceeds the standard. The laser pan-tilt detector is installed at a high place in the experimental device area to monitor combustible gases in a wide area. The flame detector is used to monitor fire conditions in the device area and can monitor the optical characteristics of tiny flames. The combination of the above three monitoring methods fully considers the flammable and explosive characteristics of natural gas and hydrogen, and can generate an alarm in time at the early stage of gas leakage to ensure the safety of the device.

[0073] In addition, the present invention also provides a hydrogen-blended natural gas experimental system for realizing a gas microgrid, comprising:

[0074] The gas source supply module is used to provide hydrogen and natural gas;

[0075] The hydrogen blending module is used to blend the provided hydrogen and natural gas;

[0076] The hydrogen blending process module is used to compress the blended hydrogen and natural gas in the compression area;

[0077] The hydrogen blending and transportation module is used to transport compressed hydrogen and natural gas to the urban hydrogen blending experimental area and the terminal user experimental area respectively;

[0078] The hydrogen blending and pressurizing module is used to pressurize the hydrogen blended natural gas in the low-pressure experimental area to the high-pressure experimental area using a compressor in the urban hydrogen blending experimental area;

[0079] The hydrogen blending module is used to test the use of hydrogen blended natural gas by end-user regional equipment.

[0080] The working principle of the present invention is as follows: hydrogen and natural gas are provided; the provided hydrogen and natural gas are mixed; the mixed hydrogen and natural gas are compressed in a compression area; the compressed hydrogen and natural gas are respectively transported to the urban hydrogen-blended experiment area and the end-user experiment area; the compressor in the urban hydrogen-blended experiment area is used to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area; and the equipment in the end-user experiment area uses the hydrogen-blended natural gas.

[0081] In addition, when the above-mentioned text creation unit, image generation unit, high-quality image training unit, and model optimization processing unit are executed, they are also used to implement other functions of the above-mentioned hydrogen-blended natural gas experiment method based on a gas microgrid, which will not be elaborated here one by one.

[0082] In addition, the present invention also provides a terminal device. In this embodiment, the hydrogen-blended natural gas experiment method based on a gas microgrid mainly applies to the terminal device, which can be a device with display and processing functions such as a PC, a portable computer, a mobile terminal, etc.

[0083] Specifically, the terminal device may include a processor (such as a CPU), a communication bus, a user interface, a network interface, and a memory. Among them, the communication bus is used to realize the connection and communication between these components; the user interface may include a display screen (Display) and an input unit such as a keyboard (Keyboard); the network interface may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface); the memory may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory, and the memory may optionally also be a storage device independent of the aforementioned processor.

[0084] Among them, a readable storage medium is stored in the memory, and a hydrogen-blended natural gas experiment program is stored in the readable storage medium. The processor can call the hydrogen-blended natural gas experiment program stored in the memory and execute the hydrogen-blended natural gas experiment method based on a gas microgrid provided in the embodiment of the present invention.

[0085] It will be appreciated that a computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium can, for example, but is not limited to, be an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punched card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium used herein is not construed as being a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0086] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to respective computing / processing devices, or can be downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0087] Computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state-setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider). In some embodiments, by using the state information of the computer-readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.

[0088] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art may still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An experimental method for hydrogen - blended natural gas based on a gas micro - grid, characterized in that, It includes the following steps: Provide hydrogen and natural gas; Mix the provided hydrogen and natural gas; Compress the mixed hydrogen and natural gas in a compression area; Respectively transport the compressed hydrogen and natural gas to the urban hydrogen-blended experiment area and the end-user experiment area; In the urban hydrogen-blended experiment area, use a compressor to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area; Use the hydrogen-blended natural gas by the equipment in the end-user experiment area.

2. The experimental method for hydrogen-doped natural gas based on a gas microgrid according to claim 1, wherein: The providing of hydrogen and natural gas includes: Hydrogen is provided by a pure hydrogen pipeline, a hydrogen cylinder group or a hydrogen tube trailer; Natural gas is provided by a natural gas pipeline, a CNG truck or an LNG truck.

3. A method for hydrogen - blended natural gas experiment based on a gas micro - grid according to claim 1, characterized in that: The mixing of the provided hydrogen and natural gas includes: In the scenario corresponding to the conventional natural gas supply, the hydrogen ratio is 0% and the natural gas ratio is 100%.

4. An experimental method for hydrogen-doped natural gas based on a gas microgrid according to claim 3, characterized in that: The mixing of the provided hydrogen and natural gas includes: In the scenario corresponding to pure hydrogen, the hydrogen blending ratio is 100% and the natural gas ratio is 0%.

5. A hydrogen-doped natural gas experimental method based on a gas microgrid according to claim 1, characterized in that: The respectively transporting the compressed hydrogen and natural gas to the urban hydrogen-blended experiment area and the end-user experiment area includes: In the hydrogen-blended experiment area, introduce hydrogen through a hydrogen transport pipeline, and in the end-user experiment area, transport it to the end-user experiment area through a natural gas pipeline.

6. A method for hydrogen-doped natural gas experiment based on a gas microgrid according to claim 1, characterized in that: The using a compressor in the urban hydrogen-blended experiment area to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area includes: Transport the hydrogen-blended natural gas at the outlet of the low-pressure experiment area into the compressor, the compressor compresses the hydrogen-blended natural gas, and the compressed hydrogen-blended natural gas is transported to the inlet of the high-pressure experiment area through an exhaust pipeline.

7. A method for hydrogen-doped natural gas experiment based on a gas microgrid according to claim 1, characterized in that: The using the hydrogen-blended natural gas by the equipment in the end-user experiment area includes residential and commercial users and industrial users; The residential and commercial users use the hydrogen-blended natural gas through gas stoves, gas water heaters and gas wall-mounted boilers; The industrial users use the hydrogen-blended natural gas through industrial boilers, gas turbines, gas internal combustion engines and industrial furnaces.

8. An experimental method for hydrogen-doped natural gas based on a gas microgrid according to claim 7, characterized in that: The equipment is arranged outdoors, a cut-off valve is provided on the natural gas pipeline, and safety valves, vent valves and maintenance replacement valves are provided on the equipment and pipelines.

9. A method for hydrogen - blended natural gas experiment based on a gas micro - grid according to claim 8, characterized in that: It also includes a monitoring device for monitoring the equipment in the end-user experiment area, and the monitoring device includes a combustible gas detector, a laser pan-tilt detector and a flame detector.

10. A hydrogen-doped natural gas experimental system based on a gas microgrid for implementing the method according to any one of claims 1-9, Its characteristics include: A gas source supply module is used to provide hydrogen and natural gas; A hydrogen-blended gas mixing module is used to mix the provided hydrogen and natural gas; A hydrogen-blended process module is used to compress the mixed hydrogen and natural gas in a compression area; A hydrogen-blended transport module is used to respectively transport the compressed hydrogen and natural gas to the urban hydrogen-blended experiment area and the end-user experiment area; A hydrogen-blended boosting module is used to use a compressor in the urban hydrogen-blended experiment area to boost the hydrogen-blended natural gas in the low-pressure experiment area to the high-pressure experiment area; A hydrogen-blended use module is used to use the hydrogen-blended natural gas by the equipment in the end-user experiment area.

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