A hydrogen ammonia mixed gas common rail storage device suitable for an ammonia decomposition hydrogen production system

Abstract

This invention discloses a common rail storage device for ammonia-hydrogen mixture suitable for ammonia decomposition hydrogen production systems, relating to the field of new energy engine technology. The device comprises four main units: online ammonia catalytic cracking, pressurized mixing and buffering, intelligent sensing and central control, and mixed fuel output and application, forming a closed-loop control system. Liquid ammonia, after vaporization, enters the catalytic cracking reactor for partial decomposition, generating a hydrogen-ammonia mixture. This mixture is then pressurized and stored in the mixed fuel output and storage device. The intelligent sensing unit monitors the mixed gas parameters in real time, and the central control unit dynamically adjusts the cracking temperature, pressurization pressure, and output pressure to maintain the optimal ratio of 90% NH3 + 10% H2. The mixed gas is stored under high exhaust temperature conditions and released under low exhaust temperature conditions, ensuring stable engine operation under all operating conditions. This device solves the problems of low ammonia decomposition efficiency and unstable mixed gas supply under low exhaust temperature conditions in existing technologies. It has advantages such as high safety, high energy efficiency, and strong adaptability, and can be widely applied to online hydrogen production systems for ammonia fuel engines.

Description

Technical Field

[0001] This invention belongs to the field of new energy engine fuel supply technology, specifically to a hydrogen-ammonia mixed gas common rail storage device suitable for ammonia decomposition hydrogen production systems, which can achieve stable combustion and efficient operation of ammonia fuel engines under all operating conditions. Background Technology

[0002] Hydrogen energy, as the "ultimate energy source" for deep decarbonization of end-use energy, faces practical challenges due to its low molecular weight and low density, including low storage efficiency, high transportation costs, and significant safety risks. Ammonia (NH3), as a highly efficient hydrogen carrier, has advantages such as high energy density and easy liquefaction for storage and transportation. However, its combustion characteristics have significant defects. Its combustion speed is only 1 / 6 that of gasoline / diesel, and its high ignition temperature leads to slow flame propagation and incomplete combustion in the engine cylinder, making it prone to flameout and unburned ammonia emissions.

[0003] To address the shortcomings of pure ammonia combustion, ammonia fuel reforming and hydrogen co-firing technology has become a research hotspot. Existing technologies have attempted to optimize engine performance through ammonia decomposition to produce hydrogen and hydrogen-ammonia mixed combustion. For example, invention patent CN104675580B discloses a novel hydrogen-ammonia mixed fuel supply device for automotive engines. This device uses an exhaust gas heat exchange ammonia decomposer to catalytically decompose ammonia to produce hydrogen, stores the hydrogen in a hydrogen storage tank, and uses an ECU to control the hydrogen-ammonia ratio to improve ignition reliability. However, this device lacks an adaptive mixture storage buffer structure, resulting in low ammonia decomposition efficiency and difficulty in ensuring stable hydrogen supply during cold starts and under low-load conditions when exhaust temperature is insufficient. Invention patent CN117927390B proposes an ammonia dual-fuel system. The engine fuel supply and injection control system precisely controls the timing of ammonia-diesel injection through ammonia common rail, vaporization device and ECU to solve the fuel supply problem under high substitution rate. However, the system relies on diesel ignition and does not involve the coordinated design of online ammonia hydrogen production and mixed gas storage, which limits the zero carbon benefits. The invention patent application with publication number CN120487440A discloses a mixed injection ammonia-hydrogen engine system, which integrates an ammonia-to-hydrogen module and dual-path injection components to realize online ammonia cracking to produce hydrogen and hydrogen-ammonia mixed combustion. However, the system does not have a dedicated mixed gas storage buffer unit, which cannot cope with the fuel composition fluctuation caused by sudden changes in engine load, and the system has insufficient robustness.

[0004] Existing ammonia decomposition hydrogen production and combustion technologies generally suffer from the following drawbacks: First, under low exhaust temperature conditions such as cold start and low load, the efficiency of ammonia decomposition hydrogen production is low, and there is a lack of backup fuel supply. Second, the system does not form a closed-loop integration of "hydrogen production-storage-regulation-supply," resulting in poor stability of the mixed gas composition and pressure. Third, no dedicated device has been designed for the storage characteristics of the hydrogen-ammonia mixture, leading to safety hazards and energy waste. Therefore, there is an urgent need for a storage and regulation device that can adapt to all operating conditions and stably supply hydrogen-ammonia mixture to address the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide an efficient, safe, and intelligent ammonia-hydrogen mixed fuel preparation and supply system. Using liquid ammonia as a safe and economical hydrogen carrier, it partially converts ammonia into hydrogen through precisely controlled online catalytic cracking technology. The uncracked ammonia is then mixed and stabilized with the generated hydrogen in an optimal ratio (90% NH3 and 10% H2) in real time, ultimately forming a clean fuel with excellent combustion performance that can be directly applied to power plants. This solves the problems of low ammonia decomposition hydrogen production efficiency, unstable mixed gas supply, and high safety risks in existing ammonia-fueled engines under low exhaust temperature conditions, achieving efficient and stable operation of the engine across its entire operating range.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a hydrogen-ammonia mixed gas common rail storage device suitable for ammonia decomposition hydrogen production system, including an ammonia online catalytic cracking unit, a pressurized mixing and buffering unit, an intelligent sensing and central control unit (ECU) and a mixed fuel output and application unit, and each unit is connected in sequence through pipelines to form a closed-loop control system; The online ammonia catalytic cracking unit includes a storage tank, a gasifier, an ammonia inlet pipe, a catalytic cracking reactor, and a safety valve. The front end of the ammonia inlet pipe is connected to an external liquid ammonia source, and the rear end is connected to the gasifier. The gasifier is connected to the inlet of the catalytic cracking reactor. The catalytic cracking reactor is equipped with a heating ring on the outside and is filled with catalyst inside. The pressurized mixing and buffering unit includes a pressurization device and a mixed fuel output and storage device. The inlet of the pressurization device is connected to the outlet of the catalytic cracking reactor, and the outlet is connected to the inlet of the mixed fuel output and storage device. The mixed fuel output and storage device is made of hydrogen embrittlement resistant and corrosion resistant material, with internal baffles and external heating devices. Pressure sensors, concentration detection devices and temperature sensors are installed above the tank line. The intelligent sensing and central control unit (ECU) is electrically connected to the pressure sensor, concentration detection device, temperature sensor, heating ring, pressurization device and pressure regulating device. The mixed fuel output and application unit includes a pressure regulating device and a nozzle. The pressure regulating device is installed above the mixed fuel output and storage device, and is also connected to the intermediate pipeline between the catalytic cracking reactor and the pressurization device.

[0007] The present invention provides a common rail storage device for ammonia / hydrogen mixture in an ammonia decomposition hydrogen production system. Under high exhaust temperature conditions, this device can store a suitable concentration of hydrogen / ammonia mixture generated by the ammonia catalytic decomposition hydrogen production system (catalytic cracking reactor) in a common rail system (mixed fuel output and storage device). During cold starts and low-load conditions, the hydrogen / ammonia mixture in the common rail system (mixed fuel output and storage device) assists in the transition of ammonia-fueled engines. This device can serve online hydrogen production systems for ammonia-fueled engines, enabling stable operation of the ammonia-fueled engine across its entire operating range.

[0008] In a preferred embodiment, a safety valve is installed on the catalytic cracking reactor or the mixed fuel output and storage device.

[0009] In a further preferred embodiment, the safety valve is set to open at a pressure 1.05-1.1 times the design pressure of the catalytic cracking reactor, providing overpressure protection.

[0010] In a preferred embodiment, the mixed fuel output and storage device is a vertical or horizontal pressure vessel made of materials resistant to hydrogen embrittlement and corrosion.

[0011] In the preferred embodiment, the material of the mixed fuel output and storage device is 316L stainless steel.

[0012] In a preferred embodiment, the interior of the mixed fuel output and storage device may be equipped with a flow guide baffle or a static mixing element to enhance gas turbulence, promote further homogeneous mixing of hydrogen, ammonia, and nitrogen components, and ensure that the hydrogen concentration deviation at any location in the tank is less than ±0.5%.

[0013] In the preferred embodiment, under low-load conditions, for an engine system with a rated power of 200kW, the volume of the mixed fuel output and storage device is 300 L over 10 minutes.

[0014] In the preferred embodiment, the intelligent sensing and central control unit regulates the volume ratio of ammonia in the hydrogen-ammonia mixture to be 90%±0.5% and the volume ratio of hydrogen to be 10%±0.5%, with a control response time in the millisecond range.

[0015] In the preferred embodiment, the heating ring of the catalytic cracking reactor and the heating device of the mixed fuel output and storage device are both electrically heated structures with adjustable heating power.

[0016] In the preferred embodiment, the pressurizing device is a variable frequency compressor, and the speed is adjusted by intelligent sensing and central control unit (ECU) according to the system pressure signal.

[0017] After system startup, liquid ammonia flows from the storage tank into the vaporizer. In the vaporizer, the liquid ammonia absorbs waste heat from the engine coolant or exhaust gases, rapidly evaporating into gaseous ammonia with stable pressure and temperature. The gaseous ammonia then enters the catalytic cracking reactor through the ammonia inlet pipe for partial decomposition, forming an ammonia-hydrogen mixture. This mixture is pressurized by a pressurizing device and then enters the mixed fuel output and storage device for storage and homogenization. Based on real-time monitoring data from the pressure sensor, ammonia concentration detector, and temperature sensor at the outlet of the mixed fuel output and storage device, the intelligent sensing and central control unit (ECU) sets the concentration of the hydrogen-ammonia mixture to 90% ± 0.5% ammonia by volume and 10% ± 0.5% hydrogen by volume. The internal temperature of the catalytic cracking reactor is set to 650 ℃ ± 5 ℃, the temperature of the mixed fuel output and storage device (buffer tank) is set to 80 ℃ ± 2 ℃ to prevent ammonia liquefaction, and the gas pressure inside the buffer tank is set to 0.8 MPa ± 0.02 MPa. The pressure is adjusted to match the downstream nozzle requirements. When the concentration detection device detects a hydrogen content higher than 10.5%, it indicates excessive ammonia cracking. The ECU will reduce the power of the heating ring on the catalytic cracking reactor in milliseconds to reduce the ammonia cracking rate. If the hydrogen content is lower than 9.5%, the heating ring power is immediately increased to raise the catalytic temperature and increase hydrogen production, thereby stabilizing the composition within the set range. Temperature sensors monitor the temperature inside the reactor and the buffer tank. If the reactor temperature is higher than the set value, the ECU reduces the heating ring power; if it is lower than the set value, it increases the heating ring power to maintain a stable cracking reaction temperature. If the buffer tank temperature is lower than 78°C, the ECU activates the buffer tank heating device; if it is higher than 82°C, the heating device is shut off to prevent ammonia liquefaction or overheating that could cause composition fluctuations. The pressure sensor provides real-time feedback on the buffer tank pressure. If the pressure is higher than 0.82 MPa, the ECU simultaneously reduces the speed of the pressurizing device to reduce the gas flow into the buffer tank and increases the valve opening of the pressure regulating device to actively release pressure. If the pressure is lower than 0.78 MPa... If the pressure is increased to MPa, the speed of the pressurizing device is increased to increase the intake air volume, while the valve opening of the pressure regulating device is reduced to reduce pressure relief, quickly pulling the pressure back to the set range. By dynamically adjusting the heating ring, pressurizing device, and pressure regulating device on the catalytic cracking reactor, a closed-loop control is formed. Finally, the hydrogen-ammonia mixed fuel that reaches the target ratio and pressure is continuously and stably supplied to the engine or power generation equipment through the nozzle.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Under low exhaust temperature conditions and when ammonia decomposition efficiency is low, normal operation can still be maintained by relying on the hydrogen-ammonia mixture stored in the storage device. Under high exhaust temperature conditions and when ammonia decomposition efficiency is high, the hydrogen-ammonia mixture is stored. This also avoids energy waste.

[0019] 2. The buffer device provides a stable sampling environment and response time window for the ECU's control loop, avoiding control oscillations caused by instantaneous unevenness in airflow or concentration, and improving the overall robustness of the system.

[0020] 3. It fundamentally avoids the large-scale storage and transportation of high-pressure pure hydrogen. 90% of the mixed gas is non-flammable ammonia, and it is under controlled conditions, greatly reducing the risk of combustion and explosion.

[0021] 4. By adopting a "demand-based hydrogen production and instant mixing" strategy, energy waste is avoided. Through intelligent control by the ECU, the system always operates in an optimal state, with rapid response and high energy efficiency. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the hydrogen-ammonia mixed gas common rail storage device of the present invention; Figure 2 This is the present invention. Figure 1 Internal structure diagram of the blended fuel output and storage device; Figure 3 This is the present invention. Figure 1 Internal structure diagram of the blended fuel output and storage device; In the diagram: 1. Ammonia inlet pipe; 2. Catalytic cracking reactor; 3. Safety valve; 4. Heating ring; 5. Pressurization device; 6. Pressure sensor; 7. Concentration detection device; 8. Temperature sensor; 9. Pressure regulating device; 10. Mixed fuel output and storage device; 11. Heating device for mixed fuel output and storage device; 12. Nozzle; 13. Intelligent sensing and central control unit; 14. Baffle; 15. Static mixing unit (alternating left and right spiral blades); 16. Central support shaft. Detailed Implementation

[0023] The technical solution of the present invention will be further described and illustrated below through examples. All raw materials used in the examples are commercially available or prepared using conventional methods.

[0024] Example 1 like Figure 1 As shown, a hydrogen-ammonia mixed gas common rail storage device is applicable to an ammonia decomposition hydrogen production system. The system includes an ammonia inlet pipe 1, a catalytic cracking reactor 2, a pressurizing device 5, a buffer tank 10, a concentration detection device 7, a temperature sensor 8, a pressure regulating device 9, and a nozzle 12 connected in sequence by pipelines.

[0025] Furthermore, the inlet of the catalytic cracking reactor 2 is connected to the outlet of the ammonia inlet pipe 1, the inlet of the pressurizing device 5 is connected to the outlet of the cracking reactor 2, the inlet of the buffer tank 10 is connected to the outlet of the pressurizing device 5, the pressure sensor 6, the concentration detection device 7, and the temperature sensor 8 are all installed above the buffer tank pipeline, the pressure regulating device 9 is installed above the buffer tank 10 pipeline, and is also connected to the pipeline between the catalytic cracking reactor 2 and the pressure sensor 6, and the outlet of the mixed fuel output and storage device 10 is connected to the nozzle 12.

[0026] Furthermore, the ammonia inlet pipe 1 is used to connect to an external liquid ammonia source and introduce liquid ammonia into the system. A vaporizer is connected to the front end of the ammonia inlet pipe, which completely vaporizes the liquid ammonia into a stable gaseous ammonia flow.

[0027] Furthermore, safety valve 3 is installed on catalytic cracking reactor 2 or mixed fuel output and storage device 10, and its set opening pressure is 1.05-1.1 times the design pressure of the corresponding container to provide overpressure protection.

[0028] Furthermore, nozzle 12 is located at the end of the system for injecting the mixed fuel into the engine or power generation equipment. It also includes an intelligent sensing and central control unit 13, which is electrically connected to pressure sensor 6, concentration detection device 7, temperature sensor 8, heating ring 4 of the catalytic cracking reactor, pressurization device 5, and pressure regulating device 9.

[0029] Furthermore, the catalytic cracking reactor 2 is filled with a catalyst to decompose a portion of the ammonia into hydrogen and nitrogen.

[0030] Furthermore, the pressurizing device 5 is used to pressurize the mixed gas flowing out of the catalytic cracking reactor 2, and its rotation speed is adjusted by the central control unit 13 according to the system pressure signal.

[0031] Furthermore, the mixed fuel output and storage device 10 is used to store, homogenize, and stabilize the hydrogen-ammonia mixture from the pressurization device 5. A pressure sensor 6, a concentration detection device 7, and a temperature sensor 8 are installed on top of the mixed fuel output and storage device 10 via insert threads to transmit the pressure, concentration, and temperature signals of the gas inside the mixed fuel output and storage device 10 to the ECU 13 in real time. Simultaneously, a pressure regulating device 9 is installed on top of the tank of the mixed fuel output and storage device 10 to regulate the pressure of the output fuel.

[0032] Furthermore, the core function of the mixed fuel output and storage device 10 is to eliminate pressure pulsations, store buffer gas, and further homogenize the gas components. Specifically, the mixed fuel output and storage device 10 provides a stable gas sampling environment and control response time for the central control unit 13, effectively responding to sudden changes in engine load and avoiding control oscillations caused by instantaneous fluctuations in airflow or concentration. A heating ring is provided on the outer edge to ensure that the buffer tank maintains a stable ammonia-hydrogen mixture even in low-temperature operating environments. The tank body of the mixed fuel output and storage device 10 is a vertical or horizontal pressure vessel made of 316 L stainless steel or similar hydrogen-resistant and corrosion-resistant materials. The interior of the mixed fuel output and storage device 10 may be equipped with baffles or static mixing elements, such as... Figure 2-3 As shown, this design enhances gas turbulence, promotes further homogeneous mixing of hydrogen, ammonia, and nitrogen components, and ensures that the hydrogen concentration deviation at any point within the tank is less than ±0.5%. Under low-load conditions, for an engine system with a rated power of 200 kW, the buffer tank volume can be in the range of 300~400 L for 10 minutes.

[0033] Furthermore, pressure sensor 6, ammonia concentration detection device 7, and temperature sensor 8 monitor the status parameters of the mixed gas at the outlet of the buffer tank in real time.

[0034] Furthermore, the central control unit 13 receives real-time data from the sensors and compares it with preset target values. If the hydrogen concentration is lower than the set value, the central control unit 13 increases the power of the heating ring 4 of the catalytic cracking reactor 2 to increase hydrogen production. Furthermore, the central control unit 13 simultaneously coordinates the power of the pressurizing device 5 and the opening of the pressure regulating device 9 to ensure a constant final output pressure.

[0035] Furthermore, the pressure regulating device 9, according to the instructions of the central control unit 13, adjusts the mixed fuel to the stable pressure required by the engine. Finally, a hydrogen-ammonia mixed fuel with constant composition and stable pressure is delivered to the application terminal through the nozzle.

[0036] After the system starts up, liquid ammonia flows out of the storage tank and enters the vaporizer. In the vaporizer, the liquid ammonia absorbs waste heat from the engine coolant or exhaust gas, and rapidly evaporates into gaseous ammonia with stable pressure and temperature. The gaseous ammonia is then transported through the ammonia inlet pipe 1 to the core component—the catalytic cracking reactor 2. The safety valve 3 on the catalytic cracking reactor is a key protective device to ensure the safety of the equipment and system. Its core function is to prevent safety risks caused by abnormal pressure increases inside the reactor: when there is excessive ammonia feed, abnormally high heating ring power leading to a sharp increase in the cracking reaction rate, or blockage of subsequent pipelines (such as pressurization devices or buffer tanks) causing an increase in reactor outlet back pressure, if the pressure inside the reactor exceeds the design safety limit, the safety valve will automatically open to release pressure, discharging the excess high-pressure gas to a safe area, preventing the reactor from deforming, rupturing, or even exploding due to overpressure. Under the action of the catalyst and at the precise temperature set by ECU 13, a portion of the ammonia molecules (approximately 10%) absorb heat and decompose, generating hydrogen and nitrogen. Through precise control, the outlet of the catalytic cracking reactor 2 no longer flows out pure ammonia, but rather a pre-mixed hydrogen-ammonia mixture with a hydrogen content close to the target value (10%). This mixture is pressurized by pressurization device 5 and then enters the mixed fuel output and storage device 10 for storage and homogenization. Simultaneously, the sensor network begins operation, continuously sending internal hydrogen concentration, temperature, and pressure data to ECU 13. As the central nervous system, 13 compares the real-time data from the pressure sensor 6, ammonia concentration detection device 7, and temperature sensor 8 at the outlet of the mixed fuel output and storage device 10 with the preset target. It dynamically adjusts the heating ring 4, pressurizing device 5, and pressure regulating device 9 on the catalytic cracking reactor to form a closed-loop control. For example, if the hydrogen concentration is detected to be below 10%, it immediately increases the heating power of the heating ring 4 of the cracker 2, prompting more ammonia to decompose and produce hydrogen; conversely, it reduces the power. At the same time, it coordinates the pressurizing device 5 and the pressure regulating device 9 to ensure a constant output pressure. This process is millisecond-level and continuous, thus ensuring the extremely high stability of the final fuel. Finally, the hydrogen-ammonia mixed fuel that reaches the target ratio (90% NH3 + 10% H2) and pressure is continuously and stably supplied to the engine or power generation equipment through nozzle 12. The 10% hydrogen acts as a "combustion accelerator," thoroughly improving the combustion performance of pure ammonia, while the 90% ammonia provides the advantages of safe and economical storage and transportation.

[0037] It should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A common rail storage device for ammonia-hydrogen mixture suitable for ammonia decomposition hydrogen production systems, characterized in that, It includes an online ammonia catalytic cracking unit, a pressurized mixing and buffering unit, an intelligent sensing and central control unit, and a mixed fuel output and application unit. Each unit is connected in sequence through pipelines to form a closed-loop control system. The ammonia online catalytic cracking unit includes a storage tank, a gasifier, an ammonia inlet pipe (1), a catalytic cracking reactor (2), and a safety valve (3). The front end of the ammonia inlet pipe (1) is connected to an external liquid ammonia source, and the rear end is connected to the gasifier. The gasifier is connected to the inlet of the catalytic cracking reactor (2). The catalytic cracking reactor (2) is equipped with a heating ring (4) on the outside and is filled with catalyst inside. The pressurized mixing and buffering unit includes a pressurizing device (5) and a mixed fuel output and storage device (10). The inlet of the pressurizing device (5) is connected to the outlet of the catalytic cracking reactor (2), and the outlet is connected to the inlet of the mixed fuel output and storage device (10). The mixed fuel output and storage device (10) is made of hydrogen embrittlement resistant and corrosion resistant material, with a flow guide baffle inside and a heating device (11) outside. A pressure sensor (6), a concentration detection device (7) and a temperature sensor (8) are installed above the tank line. The intelligent sensing and central control unit (ECU) (13) is electrically connected to the pressure sensor (6), concentration detection device (7), temperature sensor (8), heating ring (4), pressurizing device (5) and pressure regulating device (9); The mixed fuel output and application unit includes a pressure regulating device (9) and a nozzle (12). The pressure regulating device (9) is installed above the mixed fuel output and storage device (10). At the same time, the pressure regulating device (9) is also connected to the intermediate pipeline between the catalytic cracking reactor (2) and the pressurizing device (5).

2. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, A safety valve (3) is installed on the catalytic cracking reactor (2) or the mixed fuel output and storage device (10).

3. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 2, characterized in that, The safety valve (3) is set to open at a pressure that is 1.05-1.1 times the design pressure of the catalytic cracking reactor (2) or the mixed fuel output and storage device (10).

4. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, The mixed fuel output and storage device (10) is a vertical or horizontal pressure vessel made of hydrogen embrittlement resistant and corrosion resistant materials.

5. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1 or 4, characterized in that, The material of the mixed fuel output and storage device (10) is 316L stainless steel.

6. The hydrogen-ammonia mixed gas common rail storage device suitable for ammonia decomposition hydrogen production systems according to claim 1 or 4, characterized in that, The interior of the mixed fuel output and storage device (10) may be equipped with a flow guide baffle (14) or a static mixing element (15).

7. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, Under low load conditions, for an engine system with a rated power of 200 kW, the volume of the 10-minute mixed fuel output and storage device (10) is 300 L.

8. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, The intelligent sensing and central control unit (13) regulates the volume ratio of ammonia in the hydrogen-ammonia mixture to 90%±0.5% and the volume ratio of hydrogen to 10%±0.5%, with a regulation response time in milliseconds.

9. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, The heating ring (4) of the catalytic cracking reactor (2) and the heating device (11) of the mixed fuel output and storage device (10) are both electrically heated structures with adjustable heating power.

10. The hydrogen-ammonia mixed gas common rail storage device for ammonia decomposition hydrogen production system according to claim 1, characterized in that, The pressurizing device (5) is a variable frequency compressor, and its speed is adjusted by the intelligent sensor and central control unit (13) according to the system pressure signal.

Images