An ammonia-hydrogen combustion system
By igniting ammonia with hydrogen and adjusting the amount of oxygen and air, the problem of difficult ignition and stable combustion in ammonia combustion systems has been solved, achieving stable combustion of pure ammonia and low carbon emissions, and providing key combustion parameter data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUOHUI (WUHAN) SMART ENERGY CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-21
AI Technical Summary
Existing ammonia combustion systems are difficult to ignite and do not burn stably, resulting in carbon emissions.
Hydrogen is used to ignite ammonia, gradually achieving stable combustion of ammonia. Then, the amount of oxygen and air added is adjusted to finally achieve stable combustion of pure ammonia. The temperature field and exhaust products are precisely tested through the flue gas treatment module to obtain the optimal combustion parameters.
It achieves nitrogen and water as the main combustion products, avoids carbon emissions, meets green and environmental protection requirements, and provides stable and efficient combustion data for different application scenarios.
Smart Images
Figure CN224534263U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clean energy technology, specifically to an ammonia-hydrogen combustion system. Background Technology
[0002] Against the backdrop of current global demand for carbon reduction, exploring and developing new low-carbon or zero-carbon emission fuels has become an important research direction. Ammonia fuel, because its combustion products are mainly nitrogen and water, and produce almost no carbon dioxide, has enormous application potential in scenarios with high decarbonization requirements. The International Energy Agency predicts that by 2050, ammonia fuel will meet 45% of the global shipping industry's energy needs.
[0003] However, ammonia presents significant challenges in ignition and stable combustion as a fuel. Currently, the common approach is to co-fire ammonia with hydrocarbon fuels such as coal or natural gas to overcome this challenge. For example, the patent "Testing Apparatus and Method for Combustion Characteristics and Combustion Mode of Blended Ammonia Fuel" (Patent No.: CN 115015464 A) proposes a method for co-firing ammonia with hydrocarbon fuels or carbon powder. While this method achieves stable combustion of ammonia, it still inherently involves carbon emissions.
[0004] In summary, existing ammonia combustion systems suffer from technical problems such as difficulty in ignition and instability in combustion. Utility Model Content
[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose an ammonia-hydrogen combustion system to solve the technical problems of difficulty in ignition and unstable combustion in the prior art.
[0006] To achieve the above-mentioned technical objectives, this application adopts the following technical solution: This application provides an ammonia-hydrogen combustion system, including a furnace, a piping module, a burner, and a flue gas treatment module.
[0007] Furnace; Piping modules, including ammonia piping, hydrogen piping, oxygen piping and compressed air piping; A burner is disposed at one end of the furnace chamber, and the burner is connected to the ammonia pipeline, the hydrogen pipeline, the oxygen pipeline, and the compressed air pipeline respectively; The flue gas treatment module includes a heat exchanger and a steam-water separator. The heat exchanger is connected to the other end of the furnace, and the steam-water separator is connected to the heat exchanger.
[0008] In some embodiments of this application, a front mixing orifice plate and a rear mixing orifice plate are sequentially arranged inside the burner along the gas flow direction.
[0009] In some embodiments of this application, an igniter is also included, which has a built-in ignition electrode and an ignition hydrogen inlet and an ignition air inlet, and is connected to the burner.
[0010] In some embodiments of this application, the burner is provided with a hydrogen inlet and a compressed air inlet, the hydrogen pipeline includes a main pipeline connected to the hydrogen inlet and a branch pipeline connected to the ignition hydrogen inlet, and the compressed air pipeline includes a main pipeline connected to the compressed air inlet and a branch pipeline connected to the ignition air inlet.
[0011] In some embodiments of this application, a first pneumatic ball valve is provided on the main pipe of the hydrogen pipeline and a second pneumatic ball valve is provided on the branch pipe; a third pneumatic ball valve is provided on the main pipe of the compressed air pipeline and a fourth pneumatic ball valve is provided on the branch pipe.
[0012] In some embodiments of this application, a one-way valve is provided on the ammonia pipeline, the hydrogen pipeline, the oxygen pipeline and the compressed air pipeline respectively.
[0013] In some embodiments of this application, a nitrogen pipeline is also included, which is connected to the burner, and a fifth pneumatic ball valve is provided on the nitrogen pipeline.
[0014] In some embodiments of this application, a control element is also included, which is disposed on at least one of the ammonia line, the hydrogen line, the oxygen line, and the compressed air line. The control element includes at least one of a pressure gauge, a pressure transmitter, a mass flow meter, and a pressure reducing valve.
[0015] In some embodiments of this application, an exhaust fan is also included, which is connected to the steam-water separator.
[0016] In some embodiments of this application, a sixth pneumatic ball valve is provided on the ammonia pipeline and a seventh pneumatic ball valve is provided on the oxygen pipeline.
[0017] Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include: This application achieves stable combustion of ammonia by igniting it with hydrogen, and then adjusting the amount of oxygen and air added to ultimately achieve stable combustion of pure ammonia. The combustion products are mainly nitrogen and water, effectively avoiding carbon emissions and meeting the requirements of green environmental protection and sustainable development. By precisely testing the temperature field and exhaust products through a flue gas treatment module, the optimal combustion parameters of ammonia under different gas environments can be obtained. This provides crucial experimental data and reference for the stable and efficient combustion of ammonia in various application scenarios, meeting the needs of different combustion applications. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the structure of an ammonia-hydrogen combustion system according to an embodiment of this application; Figure 2 This is a cross-sectional view of a pipeline module in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a burner according to an embodiment of this application; Figure 4 This is a longitudinal cross-sectional view of a burner according to an embodiment of this application; Figure 5 This is a longitudinal cross-sectional view of an ammonia pipeline in an embodiment of this application; Figure 6 This is a longitudinal cross-sectional view of a hydrogen pipeline in an embodiment of this application; Figure 7 This is a longitudinal cross-sectional view of a nitrogen pipeline in an embodiment of this application; Figure 8 This is an assembly drawing of an ammonia-hydrogen combustion system according to an embodiment of this application.
[0019] Figure label: 1-Furnace chamber, 2-Pipeline module, 3-Burner, 4-Flue gas treatment module, 5-Igniter; 11 - Pre-mixing orifice plate, 12 - Post-mixing orifice plate; 21-Ammonia pipeline, 22-Hydrogen pipeline, 23-Oxygen pipeline, 24-Compressed air pipeline, 25-One-way valve, 26-Nitrogen pipeline; 22a-First pneumatic ball valve, 22b-Second pneumatic ball valve, 26a-Fifth pneumatic ball valve, 21a-Sixth pneumatic ball valve; 31-Pressure gauge, 32-Pressure transmitter, 33-Mass flow meter, 34-Pressure reducing valve; 41-Heat exchanger, 42-Steam-water separator, 43-Exhaust fan; 51 - Ignition electrode, 52 - Ignition hydrogen inlet, 53 - Ignition air inlet. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0021] Those skilled in the art will understand that, in this specification, the term "comprising" is an open-ended expression, meaning that the stated feature is present but other features are excluded. Directional terms such as "upper," "lower," "left," and "right" refer to exemplary directions based on the accompanying drawings. Features specified as "first" or "second" implicitly include one or more of that feature. Singular expressions can also be used in plural forms. "Multiple" means two or more. The terms "installed," "connected," and "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection via an intermediate medium, and it can be a connection within two components. Furthermore, "linked" can include wireless connections.
[0022] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose an ammonia-hydrogen combustion system to solve the technical problems of difficulty in ignition and unstable combustion in the prior art.
[0023] To achieve the above-mentioned technical objectives, this application adopts the following technical solution: like Figures 1-8 As shown. The installation principle of oxygen pipeline 23 is the same as that of ammonia pipeline 21, and the installation principle of compressed air pipeline 24 is the same as that of hydrogen pipeline 22.
[0024] This application provides an ammonia-hydrogen combustion system, including a furnace 1, a pipeline module 2, a burner 3, and a flue gas treatment module 4.
[0025] Piping module 2 includes ammonia pipeline 21, hydrogen pipeline 22, oxygen pipeline 23 and compressed air pipeline 24.
[0026] The burner 3 is located at one end of the furnace 1, and the burner 3 is connected to the ammonia pipeline 21, the hydrogen pipeline 22, the oxygen pipeline 23, and the compressed air pipeline 24 respectively.
[0027] The flue gas treatment module 4 includes a heat exchanger 41 and a steam-water separator 42. The heat exchanger 41 is connected to the other end of the furnace 1, and the steam-water separator 42 is connected to the heat exchanger 41.
[0028] This application achieves stable combustion of ammonia by igniting it with hydrogen, and then adjusting the amount of oxygen and air added to ultimately achieve stable combustion of pure ammonia. The combustion products are mainly nitrogen and water, effectively avoiding carbon emissions and meeting the requirements of green environmental protection and sustainable development. Precise testing of the temperature field and exhaust products using the flue gas treatment module 4 allows for the acquisition of optimal combustion parameters for ammonia under different gaseous environments. This provides crucial experimental data and reference for the stable and efficient combustion of ammonia in various application scenarios, meeting the needs of different combustion applications.
[0029] The working principle of this system begins with the ignition stage, which addresses the problem that ammonia has a high ignition point and is difficult to ignite directly.
[0030] In the initial stage of the system, hydrogen and oxygen are introduced first, and the flammability of hydrogen is used to form a stable high-temperature flame core. After the hydrogen-oxygen flame is stably burning, the control system gradually introduces ammonia into burner 3, using the high energy of the hydrogen flame to ignite and stabilize the combustion of ammonia, thus achieving the initial goal of using hydrogen to assist the combustion of ammonia.
[0031] Then, the system enters the transition and stable combustion stage. After the ammonia is successfully ignited and burns stably, the system gradually reduces the supply of hydrogen and precisely adjusts the flow rates of oxygen and compressed air according to the combustion conditions to maintain the optimal combustion atmosphere and temperature in the furnace. Ultimately, it achieves stable and efficient combustion with pure ammonia as the main fuel. The combustion products are mainly clean nitrogen and water, effectively avoiding carbon emissions.
[0032] Finally, in the data acquisition and optimization stage, the high-temperature flue gas generated by combustion is discharged from the other end of the furnace 1 and enters the flue gas treatment module 4. First, the heat is recovered and the flue gas temperature is reduced through the heat exchanger 41. At the same time, the built-in sensors will accurately test the temperature field and exhaust gas composition of the flue gas. Then, the flue gas enters the steam-water separator 42 to separate the water vapor generated by combustion. By collecting and analyzing this real-time data, the system can obtain the optimal combustion parameters of ammonia under different operating conditions, providing key experimental basis and technical support for the widespread application of ammonia energy.
[0033] In some embodiments of this application, a front mixing orifice plate 11 and a rear mixing orifice plate 12 are sequentially arranged inside the burner 3 along the gas flow direction.
[0034] Through the design of these two-stage orifice plates, the ammonia, hydrogen, oxygen, and compressed air entering the burner 3 undergo two forced mixing and homogenization processes. First, the gas is initially segmented and agitated as it passes through the pre-mixing orifice plate 11, causing different gas molecules to begin mixing rapidly. Subsequently, as the gas flows through the post-mixing orifice plate 12, it is again subjected to strong cutting and swirling effects, achieving a deeper level of molecular-level homogeneous mixing. This two-stage mixing ensures that the fuel and oxidizer form a highly homogeneous combustible mixture before entering the furnace 1, effectively avoiding unstable phenomena such as flame pulsation, flameout, or flashback caused by uneven local mixing. It also significantly reduces the generation of pollutants such as nitrogen oxides, making the entire combustion process more efficient, cleaner, and controllable.
[0035] In some embodiments of this application, an igniter 5 is also included, which has an ignition electrode 51 built in and has an ignition hydrogen inlet 52 and an ignition air inlet 53. The igniter 5 is connected to the burner 3.
[0036] When the system starts up, a small amount of hydrogen and air are supplied to the igniter 5 through a dedicated hydrogen inlet 52 and an air inlet 53. These gases are pre-mixed inside the igniter 5 and then instantly ignited by an electric spark generated by the built-in ignition electrode 51, forming an ignition torch. This torch is precisely injected into the main burner 3 to ignite the ammonia-hydrogen mixture thoroughly mixed by the pre-mixing orifice plate 11. This design effectively isolates the ignition flame from the main combustion flame in physical space, making the ignition process more independent, safe, and controllable. It avoids interference with the main combustion airflow during ignition, ensuring a high success rate and stability of ignition. Simultaneously, the igniter 5 can precisely control the flame size and position, providing a solid and reliable guarantee for the stable, safe, and efficient combustion of the main fuel.
[0037] In some embodiments of this application, the burner 3 is provided with a hydrogen inlet and a compressed air inlet, the hydrogen pipeline 22 includes a main pipeline connected to the hydrogen inlet and a branch pipeline connected to the ignition hydrogen inlet 52, and the compressed air pipeline 24 includes a main pipeline connected to the compressed air inlet and a branch pipeline connected to the ignition air inlet 53.
[0038] During system operation, the main pipeline continuously supplies hydrogen and compressed air to the burner 3 to maintain the stability of the main combustion flame. During the ignition phase, a separate branch pipeline supplies a small, stable amount of hydrogen and compressed air to the igniter 5 to generate the ignition torch. The advantage of this design is that it achieves functional separation and independent control of fuel supply, ensuring both a large, stable supply of the main combustion gas flow and a precise, reliable delivery of the small flow of gas required for the ignition process, without interference. This significantly improves the system's operational flexibility and safety, while simplifying the control logic, allowing the ignition and main combustion processes to operate under optimal conditions, thus enhancing the overall stability and reliability of the combustion system.
[0039] In some embodiments of this application, the main pipe of the hydrogen pipeline 22 is provided with a first pneumatic ball valve 22a and the branch pipe is provided with a second pneumatic ball valve 22b, and the main pipe of the compressed air pipeline 24 is provided with a third pneumatic ball valve and the branch pipe is provided with a fourth pneumatic ball valve.
[0040] Using a pneumatic drive, the control system issues commands to open or close each pneumatic ball valve according to the needs of two different operating conditions: main combustion and ignition. For example, during the ignition stage, the system controls the second and fourth pneumatic ball valves to open, allowing a small amount of gas to be supplied to the igniter 5 through the branch pipeline. After successful ignition, the first and third pneumatic ball valves are opened to switch the gas in the main pipeline to the main combustion state.
[0041] Pneumatic ball valves offer rapid response, excellent sealing performance, and high reliability. They effectively isolate different pipelines, preventing gas crosstalk and ensuring the stability and safety of ignition and main combustion processes. Furthermore, independent valve control enables clear system operation logic, a high degree of automation, and facilitates remote monitoring and programmed control, further enhancing the overall operating efficiency and ease of operation of the combustion system.
[0042] In some embodiments of this application, a one-way valve 25 is provided on the ammonia pipeline 21, the hydrogen pipeline 22, the oxygen pipeline 23, and the compressed air pipeline 24, respectively.
[0043] By utilizing the reverse shut-off characteristic of the one-way valve 25, it ensures that gas can only flow in a preset single direction, i.e., towards the burner 3 in each pipeline, without backflow. During system start-up, shutdown, or pressure fluctuations, it effectively prevents gas from mixing between different pipelines, avoiding problems such as explosion risks or reduced combustion efficiency caused by improper gas mixing.
[0044] This not only ensures the purity and supply stability of all gases, but also significantly improves the operational safety and reliability of the entire system. At the same time, it reduces the damage to equipment that may be caused by gas backflow, extends the service life, and provides a solid foundation for the system's automated control and long-term stable operation.
[0045] In some embodiments of this application, a nitrogen pipeline 26 is also included, which is connected to the burner 3, and a fifth pneumatic ball valve 26a is provided on the nitrogen pipeline 26.
[0046] Before system shutdown, maintenance, or ignition, the fifth pneumatic ball valve 26a is opened by the control system to introduce nitrogen into the burner 3 and connected pipelines. Utilizing the inert and oxygen-free properties of nitrogen, the residual combustible gases (such as hydrogen and ammonia) inside are fully purged and replaced, reducing the concentration of residual gases to below a safe range. This effectively avoids the risk of explosion that may be caused by the mixing of residual gases with air. At the same time, during long-term shutdown, nitrogen purging can also create a protective atmosphere to prevent oxidation and corrosion of the pipeline due to contact with air.
[0047] The rapid response and precise control of the fifth pneumatic ball valve 26a enable the purging process to be automated and efficient. This not only significantly improves the operational safety and reliability of the system, but also simplifies manual operation procedures, shortens downtime for maintenance, and ensures personnel safety and equipment lifespan. It is a key guarantee for ensuring the safe, stable, and long-term operation of the combustion system.
[0048] In some embodiments of this application, a control element is also included, which is disposed on at least one of the ammonia line 21, the hydrogen line 22, the oxygen line 23, and the compressed air line 24. The control element includes at least one of the pressure gauge 31, the pressure transmitter 32, the mass flow meter 33, and the pressure reducing valve 34.
[0049] Pressure gauge 31 displays the current pressure value of the pipeline intuitively, pressure transmitter 32 converts the pressure signal into an electrical signal and feeds it back to the control system, mass flow meter 33 accurately measures the mass flow rate of the gas to ensure accurate gas ratio supplied to the burner, and pressure reducing valve 34 automatically and stably reduces the inlet high pressure gas to the set working pressure according to system requirements.
[0050] Through the coordinated operation of multiple control components, the pipeline operating status can be monitored in real time, and pressure abnormalities or flow fluctuations can be detected and automatically adjusted in a timely manner, ensuring the stability and safety of the combustion process. Furthermore, it achieves refined control of gas supply, effectively improving combustion efficiency and reducing energy waste. At the same time, centralized data feedback provides a reliable basis for system optimization and fault diagnosis, enhancing the automation level and operational reliability of the entire system.
[0051] In some embodiments of this application, an exhaust fan 43 is also included, which is connected to the steam-water separator 42.
[0052] After the exhaust fan 43 is started, a negative pressure environment is formed inside the steam-water separator 42, which causes the gas to flow to the exhaust port, thereby accelerating and completely separating the gas from the separated water, and preventing non-condensable gas from accumulating in the system, affecting heat transfer efficiency or causing abnormal pressure.
[0053] It significantly improves the separation effect and working efficiency of the steam-water separator 42, ensuring the dryness and cleanliness of subsequent pipelines and equipment, effectively preventing problems such as corrosion, water hammer, or efficiency reduction caused by gas retention. At the same time, by actively pumping out rather than passively discharging, it enhances the dynamic response capability of the system, enabling it to maintain stable operation under variable load conditions, extending the service life of the equipment, and reducing maintenance costs. Overall, it optimizes the safety and economy of the entire thermal system.
[0054] In some embodiments of this application, a sixth pneumatic ball valve 21a is provided on the ammonia pipeline 21, and a seventh pneumatic ball valve is provided on the oxygen pipeline 23.
[0055] Using a pneumatic drive, the control system issues commands according to process requirements to drive the sixth and seventh pneumatic ball valves to open or close in a preset logical sequence, thereby precisely regulating the flow ratio and on / off status of ammonia and oxygen entering the reaction zone.
[0056] Pneumatic ball valves offer rapid response, excellent sealing performance, and high reliability, effectively preventing media leakage and ensuring the safety and stability of the reaction process. Furthermore, independent control facilitates automated adjustment and programmed operation, optimizing reaction conditions, improving production efficiency, and reducing the risk of manual intervention. This makes the entire system more flexible, efficient, and safe.
[0057] The platform mainly consists of a burner 3, a furnace 1, a heat exchanger 41, a steam-water separator 42, a nitrogen pipeline 26, an ammonia pipeline 21, an oxygen pipeline 23, a compressed air pipeline 24, and a hydrogen pipeline 22. Each gas pipeline is equipped with control components such as a pressure gauge 31, a pressure transmitter 32, a flow meter, a pressure reducing valve 34, a needle valve, and a pneumatic ball valve. The flow rate of different gases can be controlled by adjusting the pneumatic ball valve, allowing the gases to enter the furnace 1 through the gas inlet of the burner 3 for mixing and combustion. The burner 3 adopts a front and rear double-orifice plate design, ensuring that the gases are mixed evenly within the orifice plate before entering the furnace 1 for combustion, thus ensuring a more stable flame. Since ammonia itself is not easily combustible and direct ignition is very difficult, the combustion process needs to be initiated through an ignition system. The system automatically controls the flow rate of ignition compressed air and ignition hydrogen through the fourth pneumatic ball valve of the compressed air pipeline 24 and the second pneumatic ball valve 22b of the hydrogen pipeline 22, using hydrogen as the ignition fuel. After successful ignition, the ammonia and hydrogen gas in the pre-set ratio are then fed into the burner to achieve stable combustion and ensure that the ammonia gas is fully combusted.
[0058] Because hydrogen is flammable and explosive, improper flow control poses an explosion risk during ignition. Therefore, this device features a specially optimized ignition structure design with separate hydrogen inlet 52 and air inlet 53. Before entering the igniter 5, the hydrogen and compressed air must be thoroughly mixed within the burner 3 via the hydrogen inlet 52 and air inlet 53, and then ignited by the ignition electrode 51 to ensure safe startup. Each pipeline in the system is equipped with a one-way valve 25 to prevent gas backflow into the gas pipeline, avoiding contamination of the gas passage and potential explosion risks.
[0059] The high-temperature flue gas generated by combustion is cooled by heat exchanger 41 and then enters steam-water separator 42 to separate condensate. The gas is then extracted by exhaust fan 43 for composition analysis. In addition, the device is equipped with an automatic nitrogen purging function. After each combustion cycle, the pneumatic ball valve in the nitrogen pipeline automatically starts nitrogen purging. Nitrogen enters the burner 3 through the nitrogen inlet to remove any unburned hazardous gases remaining in the burner and furnace 1, preventing explosions during the next ignition.
[0060] Fuel Flow Control: Combustion temperature and emission types will vary under different ammonia and hydrogen flow ratios. This device can control the proportion of fuel entering the burner by adjusting the fuel equivalence ratio. By observing flame temperature changes and analyzing emission gas composition, various combustion experiment data can be obtained to meet the needs of different application scenarios. For example, when high energy output is required, the fuel ratio with the highest flame temperature can be selected; if the emission of a specific pollutant needs to be minimized, the ratio with the lowest concentration of that pollutant in the corresponding gas detector can be selected.
[0061] The following are the safe combustion ranges for different fuel combinations. Operating within this parameter range can effectively avoid safety hazards such as backfire and explosion.
[0062] 1. Ammonia-hydrogen blended combustion: The blending ratio of ammonia, hydrogen, and air is adjustable within the range of 0-100%. The reaction is: yNH3 + xH2 + (x / 2 + 3 / 4y)O2, with an equivalence ratio range of 0.5-1.5. Three gas supply lines are used: ammonia (0-38 L / min), hydrogen (0-38 L / min), and air (0-200 L / min), all adjustable within the range. Initial range values are: ammonia (0-6 L / min), hydrogen (0-6 L / min), and air (0-35.7 L / min). To prevent backfire during combustion tests, the total flow rate of the three gases is controlled at a lower limit of approximately 80 L / min, while the upper limit can achieve the required gas mixture without flameout.
[0063] 2. Pure hydrogen combustion: Equivalent ratio range is 0.5-1.5. Two gas supply lines: hydrogen (0-50L / min) and air (0-125L / min); initial range values: hydrogen (0-12L / min) and air (0-28.6L / min); to prevent backfire during combustion tests, the total amount of both gases is controlled at the lower limit of approximately 80L / min, and the upper limit can achieve the required gas mix without flameout.
[0064] 3. Pure ammonia combustion: Equivalent ratio range is 0.5-1.5. Two gas supply lines: ammonia (0-38L / min) and oxygen (0-47.5L / min); Initial range values: ammonia (0-6L / min) and oxygen (0-4L / min); To prevent backfire during combustion tests, the total amount of both gases is controlled at the lower limit of approximately 45L / min, while the upper limit can achieve the required gas mix without flameout. Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include: This application achieves stable combustion of ammonia by igniting it with hydrogen, and then adjusting the amount of oxygen and air added to ultimately achieve stable combustion of pure ammonia. The combustion products are mainly nitrogen and water, effectively avoiding carbon emissions and meeting the requirements of green environmental protection and sustainable development. Precise testing of the temperature field and exhaust products using the flue gas treatment module 4 allows for the acquisition of optimal combustion parameters for ammonia under different gaseous environments. This provides crucial experimental data and reference for the stable and efficient combustion of ammonia in various application scenarios, meeting the needs of different combustion applications.
[0065] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, processes, and procedures discussed in this application can be alternated, modified, rearranged, decomposed, combined, or deleted.
[0066] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.
Claims
1. An ammonia-hydrogen combustion system, characterized in that, include: Furnace; Piping modules, including ammonia piping, hydrogen piping, oxygen piping and compressed air piping; A burner is disposed at one end of the furnace chamber, and the burner is connected to the ammonia pipeline, the hydrogen pipeline, the oxygen pipeline, and the compressed air pipeline respectively; The flue gas treatment module includes a heat exchanger and a steam-water separator. The heat exchanger is connected to the other end of the furnace, and the steam-water separator is connected to the heat exchanger.
2. The ammonia-hydrogen combustion system according to claim 1, characterized in that, The burner is provided with a front mixing orifice plate and a rear mixing orifice plate arranged sequentially along the gas flow direction.
3. The ammonia-hydrogen combustion system according to claim 2, characterized in that, It also includes an igniter, which has a built-in ignition electrode and an ignition hydrogen inlet and an ignition air inlet, and is connected to the burner.
4. The ammonia-hydrogen combustion system according to claim 3, characterized in that, The burner has a hydrogen inlet and a compressed air inlet. The hydrogen pipeline includes a main pipeline connected to the hydrogen inlet and a branch pipeline connected to the ignition hydrogen inlet. The compressed air pipeline includes a main pipeline connected to the compressed air inlet and a branch pipeline connected to the ignition air inlet.
5. The ammonia-hydrogen combustion system according to claim 4, characterized in that, The main pipeline of the hydrogen pipeline is equipped with a first pneumatic ball valve and the branch pipeline is equipped with a second pneumatic ball valve. The main pipeline of the compressed air pipeline is equipped with a third pneumatic ball valve and the branch pipeline is equipped with a fourth pneumatic ball valve.
6. The ammonia-hydrogen combustion system according to claim 1, characterized in that, One-way valves are respectively installed on the ammonia pipeline, the hydrogen pipeline, the oxygen pipeline and the compressed air pipeline.
7. The ammonia-hydrogen combustion system according to claim 1, characterized in that, It also includes a nitrogen pipeline, which is connected to the burner, and a fifth pneumatic ball valve is installed on the nitrogen pipeline.
8. The ammonia-hydrogen combustion system according to claim 1, characterized in that, It also includes a control element disposed on at least one of the ammonia line, the hydrogen line, the oxygen line, and the compressed air line, the control element including at least one of a pressure gauge, a pressure transmitter, a mass flow meter, and a pressure reducing valve.
9. The ammonia-hydrogen combustion system according to claim 1, characterized in that, It also includes an exhaust fan, which is connected to the steam-water separator.
10. The ammonia-hydrogen combustion system according to claim 1, characterized in that, A sixth pneumatic ball valve is installed on the ammonia pipeline, and a seventh pneumatic ball valve is installed on the oxygen pipeline.