Offshore platform hydrogen-doped fuel supply system and implementation method thereof
By designing a hydrogen-blended fuel supply system on an offshore platform and using a controller to regulate the flow of hydrogen and natural gas, the problems of large deviations in the hydrogen blending ratio and unstable supply have been solved, achieving stable supply and simplified metering, reducing the amount of modification work, and enabling wind power-generated hydrogen storage.
Patent Information
- Application Number
- CN202511295424.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2025-12-23
AI Technical Summary
Existing natural gas hydrogen blending devices suffer from large deviations in hydrogen blending ratios, cumbersome metering, and unstable supply, leading to unstable operation of gas equipment and potential safety hazards.
Design a hydrogen-blended fuel supply system for offshore platforms, including a low-hydrogen gas storage tank, a high-hydrogen gas storage tank, hydrogen pipelines, and natural gas pipelines. Equipped with a controller and various safety valves, sensors, flow meters, etc., the system regulates the flow rates of hydrogen and natural gas through the controller to ensure a stable hydrogen blending ratio.
It meets the hydrogen blending ratio requirements of different gas-using equipment, with small deviations in the hydrogen blending ratio, simple metering, reduced workload for burner modification, and has storage function for hydrogen produced from wind power, ensuring a stable supply of hydrogen-blended natural gas.
Smart Images
Figure CN121184733A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine fuel supply technology, specifically to a hydrogen-blended fuel supply system for offshore platforms and its implementation method. Background Technology
[0002] In the industrial application of hydrogen energy, hydrogen-fired gas turbines are a key factor in achieving a carbon-free, hydrogen-based society by 2050 through the use of renewable energy globally. Offshore operating platforms possess a significant number of gas turbine-driven compressors and generators, providing a wide range of possibilities for hydrogen energy utilization. Simultaneously, offshore operating platforms also have oil and gas boilers, which can also serve as hydrogen energy utilization devices. Compared to natural gas, hydrogen has the advantages of faster combustion speed and higher flame temperature. The blending of hydrogen increases the flame propagation speed of the fuel, lowers the minimum ignition energy, and widens the lean fuel limit. Therefore, existing gas turbines and boilers on offshore operating platforms need to undergo hydrogen blending assessments, and where necessary, appropriate modifications should be made to ensure compatibility with hydrogen-blended natural gas. Current research primarily focuses on ensuring gas performance and safety on offshore platforms after adjusting the hydrogen blending ratio, without altering the end-user gas equipment. The main impacts of blending hydrogen into natural gas on the mixed gas include changes in calorific value, specific gravity, combustion limits, flame emissivity, the Joule-Thomson effect, and minimum ignition energy. These effects are crucial to the operational stability and safety of gas-consuming equipment such as gas turbines and boilers. Therefore, it is necessary to configure a reasonable and reliable hydrogen-blended gas supply system based on the specific application of gas turbines and boilers on offshore platforms.
[0003] Currently, due to limitations in hydrogen production and storage technologies, the large-scale application of hydrogen energy is still in a transitional stage. Natural gas blending with hydrogen directly utilizes the advantages of natural gas pipelines, while also offering benefits such as lower investment, rapid economic returns, and wide connectivity to end users. This makes it a feasible solution for transitioning from fossil fuels to a hydrogen economy and accelerating the development of the hydrogen energy industry, while also providing technological reserves for large-scale hydrogen energy applications. More importantly, the use of blended hydrogen natural gas can increase the proportion of hydrogen in the energy mix, reduce dependence on traditional fossil fuels, and help expand hydrogen demand and reduce hydrogen production costs through large-scale production. This is of great significance for the promotion of hydrogen energy in transportation, construction, manufacturing, and power. The hydrogen blending ratio of HCNG has a significant impact on gas transmission equipment, combustion, and emission characteristics. HCNG equipment used by end users, especially industrial users, typically has parameters set for a certain hydrogen blending ratio, and the actual hydrogen blending ratio of supplied HCNG can fluctuate within a certain range. If the volume of hydrogen blended in upstream HCNG exceeds this range, it may pose risks or lead to a decrease in energy efficiency; therefore, it is essential to maintain a relatively stable hydrogen blending ratio in HCNG. The flow rate of natural gas in natural gas pipelines generally fluctuates within a certain range. If the amount of hydrogen blending is not adjusted in time according to the flow rate, the hydrogen blending ratio may exceed the control range, posing a safety risk to the entire gas transmission system and downstream users.
[0004] However, existing natural gas hydrogen blending devices rely on natural gas pipeline systems to achieve hydrogen-blended natural gas transportation. Existing technologies for natural gas hydrogen blending devices suffer from significant deviations in hydrogen blending ratios, cumbersome metering processes, and unstable hydrogen-blended gas supply, all of which severely impact the stable operation of gas equipment. Summary of the Invention
[0005] To address the aforementioned problems, the purpose of this invention is to provide a hydrogen-blended fuel supply system for offshore platforms and its implementation method, which can solve the technical problems of large deviations in hydrogen blending ratios and safety hazards to downstream users in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: The hydrogen-blended fuel supply system for offshore platforms according to the present invention includes: The low-hydrogen gas storage tank has a hydrogen inlet and a natural gas inlet on one side, and a low-hydrogen gas outlet on the other side. The high-hydrogen gas storage tank has a hydrogen inlet and a natural gas inlet on one side, and a high-hydrogen gas outlet on the other side. The hydrogen pipeline has its first end connected to a hydrogen source and its second end splitting into two branches. The first branch of the hydrogen pipeline is connected to the hydrogen inlet of the low-hydrogen gas storage tank, and the second branch of the hydrogen pipeline is connected to the hydrogen inlet of the high-hydrogen gas storage tank. The natural gas pipeline has its first end connected to a natural gas source and its second end splitting into two branches. The first branch of the natural gas pipeline is connected to the natural gas inlet of the low-hydrogen gas storage tank, and the second branch of the natural gas pipeline is connected to the natural gas inlet of the high-hydrogen gas storage tank. The low-hydrogen gas outlet of the low-hydrogen gas storage tank is connected to the low-hydrogen gas equipment via a low-hydrogen gas pipeline. The high-hydrogen gas outlet of the high-hydrogen gas storage tank is connected to the high-hydrogen gas equipment via a high-hydrogen gas pipeline.
[0007] The aforementioned offshore platform hydrogen fuel supply system preferably further includes a controller for controlling the on / off of hydrogen pipelines, natural gas pipelines, low-hydrogen fuel gas pipelines, and high-hydrogen fuel gas pipelines.
[0008] Preferably, in the aforementioned offshore platform hydrogen fuel supply system, the low-hydrogen gas storage tank is equipped with a first safety valve, a first pressure sensor, and a first hydrogen concentration monitor; the first safety valve, the first pressure sensor, and the first hydrogen concentration monitor are electrically connected to the controller; the first safety valve is automatically opened when the pressure in the low-hydrogen gas storage tank rises and exceeds a set value; the first pressure sensor is used to monitor the pressure in the low-hydrogen gas storage tank; and the first hydrogen concentration monitor is used to monitor the hydrogen concentration value in the low-hydrogen gas storage tank.
[0009] Preferably, the offshore platform hydrogen fuel supply system includes a second safety valve, a second pressure sensor, and a second hydrogen concentration monitor on the high-hydrogen gas storage tank. The second safety valve, the second pressure sensor, and the second hydrogen concentration monitor are electrically connected to the controller. The second safety valve automatically opens when the pressure inside the high-hydrogen gas storage tank rises and exceeds a set value. The second pressure sensor monitors the pressure inside the high-hydrogen gas storage tank. The second hydrogen concentration monitor monitors the hydrogen concentration value inside the high-hydrogen gas storage tank.
[0010] Preferably, the hydrogen fuel supply system for offshore platforms includes, from upstream to downstream, a hydrogen pressure reducing valve, a hydrogen flow meter, a hydrogen regulating valve, a hydrogen vent line flame arrester, and a hydrogen vent line shut-off valve on the hydrogen pipeline. The first branch of the hydrogen pipeline is equipped with a low-hydrogen gas storage tank hydrogen inlet shut-off valve, and the second branch of the hydrogen pipeline is equipped with a high-hydrogen gas storage tank hydrogen inlet shut-off valve. The hydrogen pressure reducing valve, hydrogen flow meter, hydrogen regulating valve, hydrogen vent line flame arrester, hydrogen vent line shut-off valve, low-hydrogen gas storage tank hydrogen inlet shut-off valve, and high-hydrogen gas storage tank hydrogen inlet shut-off valve are all connected to the controller.
[0011] Preferably, the offshore platform hydrogen fuel supply system includes, from upstream to downstream, a natural gas pressure reducing valve, a natural gas flow meter, a natural gas regulating valve, a natural gas venting pipeline flame arrester, and a natural gas venting pipeline shut-off valve on the natural gas pipeline. The first branch of the natural gas pipeline is equipped with a low-hydrogen gas storage tank inlet shut-off valve, and the second branch of the natural gas pipeline is equipped with a high-hydrogen gas storage tank inlet shut-off valve. The natural gas pressure reducing valve, natural gas flow meter, natural gas regulating valve, natural gas venting pipeline flame arrester, natural gas venting pipeline shut-off valve, low-hydrogen gas storage tank inlet shut-off valve, and high-hydrogen gas storage tank inlet shut-off valve are all connected to the controller.
[0012] The present invention also provides a method for implementing a hydrogen-blended fuel supply system for offshore platforms, comprising the following steps: When replenishing the low-hydrogen gas storage tank, the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is closed, the hydrogen vent pipeline shut-off valve is closed, and the hydrogen inlet shut-off valve of the low-hydrogen gas storage tank is open. The hydrogen injection volume of the low-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is closed, the natural gas vent pipeline shut-off valve is closed, and the natural gas inlet shut-off valve of the low-hydrogen gas storage tank is open. The natural gas injection volume of the low-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the low-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG denoted as the volumetric flow rate of natural gas; k is the hydrogen blending ratio coefficient, and the hydrogen blending coefficient k for low-hydrogen gas storage tanks is 0.3 ± 0.05.
[0013] When replenishing the high-hydrogen gas storage tank, the hydrogen inlet shut-off valve and the hydrogen vent pipeline shut-off valve of the low-hydrogen gas storage tank are closed, while the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is open. The hydrogen injection volume of the high-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve and the natural gas vent pipeline shut-off valve of the low-hydrogen gas storage tank are closed, while the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is open. The natural gas injection volume of the high-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the high-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG Where is the volumetric flow rate of natural gas, and k is the hydrogen blending ratio coefficient. The hydrogen blending coefficient k for high-hydrogen gas storage tanks is 0.5 ± 0.05.
[0014] The present invention has the following advantages due to the adoption of the above technical solutions: The offshore platform natural gas hydrogen-blended fuel supply system of this invention can simultaneously supply hydrogen-blended natural gas with different blending ratios to different gas-consuming equipment, meeting the requirements of various equipment for the hydrogen blending ratio. It features small blending ratio deviations and simple metering, and reduces the workload of modifying existing burner devices. Meanwhile, existing natural gas hydrogen blending systems can only blend hydrogen, not store it, and cannot regulate the fluctuations in hydrogen production from wind power. This invention sets up two or more high-pressure storage tanks for hydrogen-blended natural gas with preset blending ratios. The volume of the high-pressure storage tanks can be determined based on the downstream users' hydrogen-blended natural gas consumption, realizing the storage function for hydrogen produced from wind power and ensuring a stable supply of hydrogen-blended natural gas. Attached Figure Description
[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings: Figure 1 This is a schematic diagram of the structure of the offshore platform hydrogen-blended fuel supply system described in this invention.
[0016] The labels for the attached figures are as follows: 1-Hydrogen pipeline; 2-Natural gas pipeline; 3-Low-hydrogen gas pipeline; 4-High-hydrogen gas pipeline; 5-Controller; 6-Low-hydrogen gas storage tank; 7-High-hydrogen gas storage tank; 8-First safety valve; 9-First pressure sensor; 10-First hydrogen concentration monitor; 11-Second safety valve; 12-Second pressure sensor; 13-Second hydrogen concentration monitor; 14-Hydrogen pressure reducing valve; 15-Hydrogen flow meter; 16-Hydrogen regulating valve; 17-Hydrogen vent pipeline flame arrester; 18-Hydrogen vent pipeline shut-off valve; 19-Low-hydrogen gas storage tank hydrogen inlet shut-off valve; 20-High-hydrogen gas storage tank hydrogen inlet shut-off valve; 21-Natural gas pressure reducing valve; 22-Natural gas flow meter; 23-Natural gas regulating valve; 24-Natural gas vent pipeline flame arrester; 25-Natural gas vent pipeline shut-off valve; 26-Low-hydrogen gas storage tank natural gas inlet shut-off valve; 27-High-hydrogen gas storage tank natural gas inlet shut-off valve. Detailed Implementation
[0017] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.
[0018] This invention provides a hydrogen-blended fuel supply system for offshore platforms. By simultaneously supplying hydrogen-blended natural gas with different blending ratios to different gas-consuming devices, it meets the hydrogen blending ratio requirements of various devices, resulting in small deviations in the blending ratio and simple metering. Furthermore, it reduces the workload of modifying existing burner units. This invention incorporates two or more high-pressure storage tanks for hydrogen-blended natural gas with predetermined blending ratios. The volume of these tanks can be determined based on the downstream users' hydrogen-blended natural gas consumption, enabling the storage of hydrogen produced from wind power and ensuring a stable supply of hydrogen-blended natural gas.
[0019] like Figure 1 As shown, the hydrogen-blended fuel supply system for offshore platforms provided by the present invention includes: The low-hydrogen gas storage tank 6 has a hydrogen inlet and a natural gas inlet on one side, and a low-hydrogen gas outlet on the other side. The high-hydrogen gas storage tank 7 has a hydrogen inlet and a natural gas inlet on one side, and a high-hydrogen gas outlet on the other side. Hydrogen pipeline 1 has its first end connected to a hydrogen source and its second end splitting into two branches. The first branch of the hydrogen pipeline is connected to the hydrogen inlet of the low-hydrogen gas storage tank 6, and the second branch of the hydrogen pipeline is connected to the hydrogen inlet of the high-hydrogen gas storage tank 7. Natural gas pipeline 2 has its first end connected to a natural gas source, and its second end splits into two branches. The first branch of the natural gas pipeline is connected to the natural gas inlet of the low-hydrogen gas storage tank 6, and the second branch of the natural gas pipeline is connected to the natural gas inlet of the high-hydrogen gas storage tank 7. The low-hydrogen gas outlet of the low-hydrogen gas storage tank 6 is connected to the low-hydrogen gas equipment via the low-hydrogen gas pipeline 3. The high-hydrogen gas outlet of the high-hydrogen gas storage tank 7 is connected to the high-hydrogen gas equipment via the high-hydrogen gas pipeline 4.
[0020] In the above embodiments, preferably, the present invention further includes a controller 5, which is used to control the on / off of the hydrogen pipeline 1, the natural gas pipeline 2, the low-hydrogen gas pipeline 3 and the high-hydrogen gas pipeline 4.
[0021] In the above embodiments, preferably, the low-hydrogen gas storage tank 6 is equipped with a first safety valve 8, a first pressure sensor 9, and a first hydrogen concentration monitor 10; the first safety valve 8, the first pressure sensor 9, and the first hydrogen concentration monitor 10 are electrically connected to the controller 5; the first safety valve 8 is used to automatically open when the pressure in the low-hydrogen gas storage tank 6 rises and exceeds a set value; the first pressure sensor 9 is used to monitor the pressure in the low-hydrogen gas storage tank 6; and the first hydrogen concentration monitor 10 is used to monitor the hydrogen concentration value in the low-hydrogen gas storage tank 6.
[0022] In the above embodiments, preferably, the high-hydrogen gas storage tank 7 is equipped with a second safety valve 11, a second pressure sensor 12, and a second hydrogen concentration monitor 13; the second safety valve 11, the second pressure sensor 12, and the second hydrogen concentration monitor 13 are electrically connected to the controller 5; the second safety valve 11 is used to automatically open when the pressure in the high-hydrogen gas storage tank 7 rises and exceeds a set value; the second pressure sensor 12 is used to monitor the pressure in the high-hydrogen gas storage tank 7; and the second hydrogen concentration monitor 13 is used to monitor the hydrogen concentration value in the high-hydrogen gas storage tank 7.
[0023] In the above embodiment, preferably, the hydrogen pipeline 1 is provided with a hydrogen pressure reducing valve 14, a hydrogen flow meter 15, a hydrogen regulating valve 16, a hydrogen venting pipeline flame arrester 17, and a hydrogen venting pipeline shut-off valve 18 in sequence from upstream to downstream. The first branch of the hydrogen pipeline is provided with a low-hydrogen gas storage tank hydrogen inlet shut-off valve 19, and the second branch of the hydrogen pipeline is provided with a high-hydrogen gas storage tank hydrogen inlet shut-off valve 20. The hydrogen pressure reducing valve 14, hydrogen flow meter 15, hydrogen regulating valve 16, hydrogen venting pipeline flame arrester 17, hydrogen venting pipeline shut-off valve 18, low-hydrogen gas storage tank hydrogen inlet shut-off valve 19, and high-hydrogen gas storage tank hydrogen inlet shut-off valve 20 are respectively connected to the controller 5.
[0024] In the above embodiment, preferably, the natural gas pipeline 2 is provided with a natural gas pressure reducing valve 21, a natural gas flow meter 22, a natural gas regulating valve 23, a natural gas venting pipeline flame arrester 24, and a natural gas venting pipeline shut-off valve 25 in sequence from upstream to downstream. The first branch of the natural gas pipeline is provided with a low-hydrogen gas storage tank natural gas inlet shut-off valve 26; the second branch of the natural gas pipeline is provided with a high-hydrogen gas storage tank natural gas inlet shut-off valve 27. The natural gas pressure reducing valve 21, the natural gas flow meter 22, the natural gas regulating valve 23, the natural gas venting pipeline flame arrester 24, the natural gas venting pipeline shut-off valve 25, the low-hydrogen gas storage tank natural gas inlet shut-off valve 26, and the high-hydrogen gas storage tank natural gas inlet shut-off valve 27 are respectively connected to the controller 5.
[0025] The present invention also provides a method for implementing a hydrogen-blended fuel supply system for offshore platforms, comprising the following steps: S1. When replenishing the low-hydrogen gas storage tank, the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is closed, the hydrogen vent pipeline shut-off valve is closed, and the hydrogen inlet shut-off valve of the low-hydrogen gas storage tank is open. The hydrogen injection volume of the low-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is closed, the natural gas vent pipeline shut-off valve is closed, and the natural gas inlet shut-off valve of the low-hydrogen gas storage tank is open. The natural gas injection volume of the low-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the low-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG denoted as the volumetric flow rate of natural gas; k is the hydrogen blending ratio coefficient, and the hydrogen blending coefficient k for low-hydrogen gas storage tanks is 0.3 ± 0.05.
[0026] S2. When replenishing the high-hydrogen gas storage tank, the hydrogen inlet shut-off valve of the low-hydrogen gas storage tank is closed, the hydrogen vent pipeline shut-off valve is closed, and the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is opened. The hydrogen injection volume of the high-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve of the low-hydrogen gas storage tank is closed, the natural gas vent pipeline shut-off valve is closed, and the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is opened. The natural gas injection volume of the high-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the high-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG Where is the volumetric flow rate of natural gas, and k is the hydrogen blending ratio coefficient. The hydrogen blending coefficient k for high-hydrogen gas storage tanks is 0.5 ± 0.05.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A hydrogen-blended fuel supply system for offshore platforms, characterized in that, include: The low-hydrogen gas storage tank has a hydrogen inlet and a natural gas inlet on one side, and a low-hydrogen gas outlet on the other side. The high-hydrogen gas storage tank has a hydrogen inlet and a natural gas inlet on one side, and a high-hydrogen gas outlet on the other side. The hydrogen pipeline has its first end connected to a hydrogen source and its second end splitting into two branches. The first branch of the hydrogen pipeline is connected to the hydrogen inlet of the low-hydrogen gas storage tank, and the second branch of the hydrogen pipeline is connected to the hydrogen inlet of the high-hydrogen gas storage tank. The natural gas pipeline has its first end connected to a natural gas source and its second end splitting into two branches. The first branch of the natural gas pipeline is connected to the natural gas inlet of the low-hydrogen gas storage tank, and the second branch of the natural gas pipeline is connected to the natural gas inlet of the high-hydrogen gas storage tank. The low-hydrogen gas outlet of the low-hydrogen gas storage tank is connected to the low-hydrogen gas equipment via a low-hydrogen gas pipeline. The high-hydrogen gas outlet of the high-hydrogen gas storage tank is connected to the high-hydrogen gas equipment via a high-hydrogen gas pipeline.
2. The offshore platform hydrogen-blended fuel supply system according to claim 1, characterized in that, It also includes a controller for controlling the on / off of hydrogen pipelines, natural gas pipelines, low-hydrogen gas pipelines and high-hydrogen gas pipelines.
3. The offshore platform hydrogen-blended fuel supply system according to claim 2, characterized in that, The low-hydrogen gas storage tank is equipped with a first safety valve, a first pressure sensor, and a first hydrogen concentration monitor. The first safety valve, the first pressure sensor, and the first hydrogen concentration monitor are each electrically connected to the controller; The first safety valve is used to automatically open when the pressure in the low-hydrogen gas storage tank rises and exceeds a set value; The first pressure sensor is used to monitor the pressure inside the low-hydrogen gas storage tank; The first hydrogen concentration monitor is used to monitor the hydrogen concentration in the low-hydrogen gas storage tank.
4. The offshore platform hydrogen-blended fuel supply system according to claim 2, characterized in that, The high-hydrogen gas storage tank is equipped with a second safety valve, a second pressure sensor, and a second hydrogen concentration monitor; The second safety valve, the second pressure sensor, and the second hydrogen concentration monitor are each electrically connected to the controller; The second safety valve is used to automatically open when the pressure inside the high-hydrogen gas storage tank rises and exceeds a set value; The second pressure sensor is used to monitor the pressure inside the high-hydrogen gas storage tank; The second hydrogen concentration monitor is used to monitor the hydrogen concentration in the high-hydrogen gas storage tank.
5. The offshore platform hydrogen-blended fuel supply system according to claim 2, characterized in that, The hydrogen pipeline is equipped with a hydrogen pressure reducing valve, a hydrogen flow meter, a hydrogen regulating valve, a hydrogen venting pipeline flame arrester, and a hydrogen venting pipeline shut-off valve in sequence from upstream to downstream. The first branch of the hydrogen pipeline is equipped with a low-hydrogen gas storage tank hydrogen inlet shut-off valve, and the second branch of the hydrogen pipeline is equipped with a high-hydrogen gas storage tank hydrogen inlet shut-off valve. The hydrogen pressure reducing valve, hydrogen flow meter, hydrogen regulating valve, hydrogen venting pipeline flame arrester, hydrogen venting pipeline shut-off valve, low-hydrogen gas storage tank hydrogen inlet shut-off valve, and high-hydrogen gas storage tank hydrogen inlet shut-off valve are respectively connected to the controller.
6. The offshore platform hydrogen-blended fuel supply system according to claim 2, characterized in that, The natural gas pipeline is equipped with a natural gas pressure reducing valve, a natural gas flow meter, a natural gas regulating valve, a natural gas venting pipeline flame arrester, and a natural gas venting pipeline shut-off valve in sequence from upstream to downstream. The first branch of the natural gas pipeline is equipped with a natural gas inlet shut-off valve for a low-hydrogen gas storage tank, and the second branch of the natural gas pipeline is equipped with a natural gas inlet shut-off valve for a high-hydrogen gas storage tank. The natural gas pressure reducing valve, natural gas flow meter, natural gas regulating valve, natural gas venting pipeline flame arrester, natural gas venting pipeline shut-off valve, low-hydrogen gas storage tank natural gas inlet shut-off valve, and high-hydrogen gas storage tank natural gas inlet shut-off valve are respectively connected to the controller.
7. A method for implementing a hydrogen-blended fuel supply system for offshore platforms according to any one of claims 1 to 6, characterized in that, Includes the following steps: When replenishing the low-hydrogen gas storage tank, the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is closed, the hydrogen vent pipeline shut-off valve is closed, and the hydrogen inlet shut-off valve of the low-hydrogen gas storage tank is open. The hydrogen injection volume of the low-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is closed, the natural gas vent pipeline shut-off valve is closed, and the natural gas inlet shut-off valve of the low-hydrogen gas storage tank is open. The natural gas injection volume of the low-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the low-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG denoted as the volumetric flow rate of natural gas; k is the hydrogen blending ratio coefficient, and the hydrogen blending coefficient k for low-hydrogen gas storage tanks is 0.3 ± 0.
05.
8. The implementation method according to claim 7, characterized in that, It also includes the following steps: When replenishing the high-hydrogen gas storage tank, the hydrogen inlet shut-off valve and the hydrogen vent pipeline shut-off valve of the low-hydrogen gas storage tank are closed, while the hydrogen inlet shut-off valve of the high-hydrogen gas storage tank is open. The hydrogen injection volume of the high-hydrogen gas storage tank is adjusted through the hydrogen regulating valve. At the same time, the natural gas inlet shut-off valve and the natural gas vent pipeline shut-off valve of the low-hydrogen gas storage tank are closed, while the natural gas inlet shut-off valve of the high-hydrogen gas storage tank is open. The natural gas injection volume of the high-hydrogen gas storage tank is adjusted through the natural gas regulating valve. Meanwhile, the hydrogen flow meter installed on the hydrogen pipeline and the natural gas flow meter installed on the natural gas pipeline measure the hydrogen and natural gas flow rates injected into the high-hydrogen gas storage tank. The hydrogen flow meter sends the hydrogen flow signal to the controller, and the natural gas flow meter sends the natural gas flow signal to the controller. The controller controls the hydrogen regulating valve and the natural gas regulating valve in a coordinated manner to ensure that the hydrogen flow rate and the natural gas flow rate satisfy the formula: V H2 =k / (1-k)*V CNG ; Among them, V H2 V is the volumetric flow rate of hydrogen. CNG Where is the volumetric flow rate of natural gas, and k is the hydrogen blending ratio coefficient. The hydrogen blending coefficient k for high-hydrogen gas storage tanks is 0.5 ± 0.05.