Ammonia oxygen-enriched high-pressure combustion experiment system

Abstract

The invention relates to an ammonia gas oxygen-enriched high-pressure combustion experiment system, which comprises an oxygen supply system for supplying a specific amount of pure oxygen; the compressed air supply system is used for providing compressed air; the air electric heater is used for preheating the mixed compressed air and pure oxygen; the ammonia gas supply system is used for supplying a specific amount of ammonia gas and mixing the ammonia gas with the preheated compressed air and pure oxygen gas; and the combustion chamber is used for reacting and combusting the ammonia gas, the compressed air and the pure oxygen mixed gas, and the side wall of the combustion chamber is further connected with the other strand of compressed air in the compressed air supply system, so that cooling and heat exchange are achieved. The device is compact and reasonable in structure and convenient to operate, and stable combustion and efficient utilization of ammonia gas under high-pressure and oxygen-enriched conditions are achieved by accurately controlling gas flow and pressure and adopting measures such as an oxygen-enriched combustion technology and a secondary cooling air system.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia combustion test, in particular to an ammonia oxygen-enriched high-pressure combustion test system. Background Art

[0002] Under the current severe situation of global climate change and environmental protection, reducing carbon emissions has become a focus of widespread concern in the international community. In order to achieve this goal, finding and promoting the use of low-carbon and carbon-free fuels has become the key. Ammonia, as a clean energy carrier, has only nitrogen and water as combustion products and does not produce carbon emissions, so it is regarded as an ideal choice to replace traditional carbon-containing fuels. However, ammonia has a high activation energy, which means that under conventional combustion conditions, ammonia has low combustion efficiency and is difficult to burn stably. At the same time, the energy density of combustion at normal pressure is too low. In order to overcome this problem, it is particularly important to develop an efficient and low-emission ammonia burner.

[0003] In the research and development of ammonia burners, high-pressure oxygen-enriched combustion technology has become an important research direction. By increasing the oxygen concentration during the combustion process, the combustion efficiency and stability of ammonia can be significantly improved. However, the implementation of this technology faces many technical challenges. First, the explosion limit range of ammonia in the air is relatively narrow, and the concentration control of the mixed gas becomes the key. If the concentration is not properly controlled, it is easy for the mixed gas to enter the explosion limit range, thereby causing a safety accident. Secondly, oxygen-enriched combustion will produce higher temperatures, which places extremely high demands on the fire resistance of the burner. In order to protect the burner flame tube from high temperature damage, effective cooling measures must be taken.

[0004] For example, Chinese patent CN105674319A discloses a composite fuel system based on ammonia and oxygen, a storage device, a pressure delivery device, a delivery pipeline and a combustion device, wherein the storage device includes at least two sets of oxygen storage devices and ammonia storage devices, the pressure delivery device includes at least an ammonia delivery device and an oxygen delivery device, and the pipeline includes at least an oxygen pipeline and an ammonia pipeline; although the combustion reaction of ammonia is also mentioned in the patent, the combustion is actually carried out under a conventional atmospheric pressure environment in the patent, and the energy density of the combustion is too low. Moreover, the patent uses pure oxygen as a combustion aid, which is too expensive and is not convenient to adjust the ratio between oxygen and ammonia. At the same time, the ammonia and oxygen are not preheated, resulting in a large temperature difference in combustion, which affects the combustion efficiency.

[0005] The above-mentioned problems also restrict the widespread application and promotion of ammonia as a fuel. Although high-pressure oxygen-enriched combustion technology can significantly improve the combustion efficiency and stability of ammonia, making it possible to use ammonia as a clean energy, due to its technical challenges and safety risks, such as the difficulty in controlling the concentration of the mixed gas and the extremely high requirements for the fire resistance of the burner due to high temperature, ammonia still faces many limitations in practical applications.

[0006] For this purpose, we propose an ammonia oxygen-enriched high-pressure combustion experimental system. Summary of the invention

[0007] In view of the shortcomings of the above-mentioned existing production technologies, the applicant provides an ammonia oxygen-enriched high-pressure combustion experimental system, which achieves stable combustion and efficient utilization of ammonia under high-pressure and oxygen-enriched conditions by precisely controlling gas flow and pressure, adopting oxygen-enriched combustion technology and a two-stage cooling air system.

[0008] The technical solution adopted by the present invention is as follows:

[0009] An ammonia oxygen-enriched high-pressure combustion experimental system, comprising:

[0010] An oxygen supply system for supplying a specific amount of high-pressure pure oxygen;

[0011] A compressed air supply system is used to provide compressed air, and the provided air is divided into two streams, one of which is mixed with pure oxygen to adjust the concentration of pure oxygen;

[0012] An electric air heater, which is used to preheat the mixed compressed air and pure oxygen;

[0013] An ammonia supply system, which is used to supply a specific amount of high-pressure ammonia and mix it with preheated compressed air and pure oxygen gas;

[0014] The combustion chamber is used for reacting and burning a mixture of ammonia, compressed air and pure oxygen, and the side wall of the combustion chamber is also connected to another stream of compressed air in the compressed air supply system to achieve cooling and heat exchange.

[0015] As a further improvement of the above technical solution:

[0016] The oxygen supply system specifically comprises:

[0017] Oxygen cylinders, used to store liquid oxygen and provide high-pressure oxygen;

[0018] The pressure reducing valve is connected to the oxygen cylinder to reduce the oxygen pressure to 0.9-1.2MPa;

[0019] The mass flow controller is connected after the pressure reducing valve to accurately adjust the flow of oxygen.

[0020] The compressed air supply system specifically comprises:

[0021] Air compressor, used to provide high-pressure compressed air;

[0022] The pressure regulating valve is connected to the air compressor to stabilize the pressure of the compressed air and control the compressed air at 0.8-1.1MPa;

[0023] Stop valve, used to control the on and off of the main air;

[0024] Flow meter, used to monitor the flow of main air in real time;

[0025] The proportional control valve is used to adjust the mixing ratio of main air and oxygen according to experimental requirements.

[0026] The ammonia supply system specifically comprises:

[0027] Ammonia tank, used to store liquid ammonia and provide high-pressure ammonia gas;

[0028] The pressure reducing valve is connected to the ammonia tank to reduce the ammonia pressure to 0.9-1.2MPa;

[0029] The mass flow controller, connected after the pressure reducing valve, is used to accurately adjust the flow rate of ammonia.

[0030] The combustion chamber is made of high temperature resistant and corrosion resistant materials.

[0031] The side wall of the combustion chamber is connected with a secondary cooling air system, which includes a stop valve, a flow meter and a proportional regulating valve, and is used to control the flow and pressure of the cooling air to achieve cooling of the combustion chamber flame tube.

[0032] The secondary cooling air system uses room temperature air to purge and cool the flame tube, and further improves the cooling effect and the stability of the burner by increasing the heat dissipation area, using high temperature resistant materials and other optimized designs.

[0033] The system also includes a control and monitoring system for real-time monitoring and adjusting parameters such as the flow rate and pressure of each gas and the temperature of the combustion chamber to ensure accurate control and safe operation of the experimental process.

[0034] A one-way valve is arranged on the pipeline entering the combustion chamber, and a flame arrester is arranged inside the one-way valve to prevent the gas from flowing back and ensure the stability and safety of the combustion process.

[0035] The beneficial effects of the present invention are as follows:

[0036] The present invention has a compact and reasonable structure and is easy to operate. By precisely controlling the gas flow and pressure, adopting oxygen-enriched combustion technology and a secondary cooling air system, the stable combustion and efficient utilization of ammonia under high pressure and oxygen-enriched conditions are achieved. These beneficial effects work together to make the system not only highly flexible and scalable, and able to adapt to the needs of combustion experiments of different scales; it is also equipped with complete safety protection measures and environmental protection and energy-saving technologies to ensure the safety, reliability, environmental protection and energy saving of the experimental process. Therefore, the system has broad application prospects and important promotion value in the fields of energy utilization, environmental protection and scientific research.

[0037] At the same time, the present invention also has the following advantages:

[0038] By precisely controlling the gas flow and pressure, the system achieves stable combustion of ammonia under high pressure and oxygen-rich conditions. High-precision control of devices such as pressure reducing valves and mass flow controllers ensures that the flow and pressure of each gas can be accurately adjusted according to experimental requirements. This precise control not only improves the stability of combustion, but also makes the combustion process more efficient, thereby significantly improving combustion efficiency. Specifically, the system can dynamically adjust the flow and pressure of oxygen, ammonia and compressed air according to actual working conditions, ensuring that ammonia is burned under optimal conditions and achieving efficient use of energy.

[0039] The adoption of oxygen-enriched combustion technology further improves combustion efficiency. Oxygen-enriched air can significantly increase the combustion speed and temperature, allowing ammonia to burn more fully and release more energy. At the same time, oxygen-enriched combustion also reduces harmful substances such as nitrogen oxides produced during the combustion process, reduces the content and harm of emissions, and conforms to the concept of green and sustainable development. The system achieves a precise ratio of oxygen-enriched air and ammonia through optimization algorithms and precise control technology, ensuring efficient oxygen-enriched combustion.

[0040] The introduction of the secondary cooling air system effectively prevents high temperature from damaging the burner. The system uses room temperature air to purge and cool the flame tube, reducing the temperature of the flame tube and ensuring the stable operation of the burner under high temperature conditions. At the same time, the secondary cooling air system also uses optimized cooling structures and materials, such as increasing the heat dissipation area and using high temperature resistant materials, which further improves the cooling effect and the stability of the burner. This design not only extends the service life of the burner, but also reduces maintenance costs and safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the principle of the ammonia high-pressure oxygen-enriched combustion test system implemented in the present invention.

[0042] Among them: 1. Oxygen cylinder; 2. Pressure reducing valve; 3. Mass flow controller; 4. Air compressor; 5. Pressure reducing and stabilizing valve; 6. Stop valve; 7. Flow meter; 8. Proportional control valve; 9. Electric air heater; 10. One-way valve; 11. Stop valve; 12. Flow meter; 13. Proportional control valve; 14. Ammonia cylinder; 15. Pressure reducing valve; 16. Mass flow controller; A. Main combustion stage premixed gas; B. Secondary cooling air. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0044] like Figure 1 As shown, this embodiment provides an ammonia oxygen-enriched high-pressure combustion experimental system, which aims to achieve stable combustion of ammonia under high-pressure and oxygen-enriched conditions by accurately controlling the gas flow and pressure, improve combustion efficiency, and ensure stable operation of the burner. The system is mainly composed of an oxygen supply system, a compressed air supply system, an air electric heater 9, an ammonia supply system, a combustion chamber, and a control and monitoring system. The following will describe in detail each component and its expanded content.

[0045] Specifically, the oxygen supply system in this embodiment is composed of an oxygen cylinder 1, a pressure reducing valve 2 and a mass flow controller 3. The oxygen cylinder 1 provides liquid oxygen, the pressure reducing valve 2 reduces the pressure of gasified oxygen to 0.9-1.2 MPa, that is, about 10 atmospheres, and the mass flow controller 3 is used to accurately adjust the flow rate of oxygen to meet the experimental requirements. The system can ensure a stable and controllable oxygen supply.

[0046] The pressure reducing valve 2 and the mass flow controller 3 can realize high-precision oxygen pressure and flow control, and provide a reliable oxygen source for the experiment.

[0047] The compressed air supply system in this embodiment is composed of an air compressor 4, a pressure regulating valve 5, a stop valve 6, a flow meter 7 and a proportional regulating valve 8. The air compressor 4 provides compressed air with a pressure of about 0.8-1.1 MPa. After the pressure regulating valve 5 stabilizes the pressure at about 0.9 MPa, it is divided into two outputs: one is to supply the main air for mixing with oxygen. Since the amount of compressed air is larger, the overall air pressure tends to 0.9 MPa; the other is the secondary cooling air B as the secondary cooling air for cooling the combustion chamber.

[0048] The pressure regulating valve 5 ensures the stability and accuracy of the output pressure. The stop valve 6 controls the on and off of the main air, the flow meter 7 monitors the flow of the main air in real time, and the ratio regulating valve 8 adjusts the mixing ratio of the main air and oxygen according to the experimental requirements to achieve accurate gas ratio.

[0049] The electric air heater 9 is used to preheat the mixed compressed air and pure oxygen. The mixed oxygen and main air enter the electric air heater 9, and after being heated to 300 degrees Celsius, they are premixed with ammonia from the ammonia supply system to preheat the ammonia so that there will be no huge temperature difference after entering the high-temperature combustion chamber. At the same time, the electric air heater 9 should be prevented from directly heating the ammonia, which may easily cause the risk of explosion.

[0050] The electric air heater 9 adopts high-pressure resistant heating elements and optimized flow channel design to ensure that the high-pressure oxygen-enriched air is evenly heated to the required temperature in a short time. At the same time, it is equipped with a temperature sensor and a temperature control device to achieve real-time monitoring and automatic adjustment of the heating temperature, ensuring the stability and accuracy of the heating process.

[0051] The ammonia supply system in this embodiment is composed of an ammonia tank 14, a pressure reducing valve 15 and a mass flow controller 16. The ammonia tank 14 stores liquid ammonia, which is gasified by heating so that the temperature of the ammonia is about 100 degrees Celsius. At the same time, the pressure of the ammonia is reduced to 0.9-1.1 MPa by the pressure reducing valve 15. The mass flow controller 16 is used to accurately adjust the flow rate of the ammonia.

[0052] The ammonia tank 14 is made of high-strength material to ensure safe storage and supply of high-pressure ammonia. The pressure reducing valve 15 and the mass flow controller 16 use control technology similar to that of the oxygen system to achieve high-precision ammonia pressure and flow control, providing a reliable ammonia source for the experiment.

[0053] High-pressure and high-temperature ammonia will be mixed with high-pressure and high-temperature oxygen-rich air to form a main combustion stage premixed gas of nearly 10MPa. Then the premixed main combustion stage premixed gas A passes through the one-way valve 10 and enters the combustion chamber for combustion. At the same time, the secondary cooling air B passes through another pipeline, the stop valve 11, the flow meter 12 and the ratio regulating valve 13, and enters the combustion chamber to cool the flame tube.

[0054] In this embodiment, the distance from the pipeline connecting the high-temperature and high-pressure ammonia and the high-pressure and high-temperature oxygen-enriched air to the combustion chamber is 20-50 cm, so that after the ammonia and the oxygen-enriched air come into contact, they can quickly enter the combustion chamber, avoiding the hidden danger of explosion in the pipeline. At the same time, a flame arrester is also provided in the one-way valve 10, which can also avoid the risk of explosion of ammonia and oxygen-enriched air at high temperature.

[0055] Just as in the prior art, ammonia and oxygen are first mixed, and then preheated air is introduced, which just happens to provide conditions for the deflagration of ammonia. Oxygen serves as a combustion aid, and under temperature conditions, there is a risk of explosion. The solution of the present application first preheats the oxygen-enriched air and then mixes it with ammonia, so that the temperature difference between the two is not large, thereby improving the combustion efficiency. In addition, if the heating method is placed after the ammonia pipeline, high-temperature ammonia will come into contact with low-temperature oxygen-enriched air, causing the ammonia to precool and form a gas-liquid mixture. After subsequent heating, there is a risk of explosion under the action of oxygen. Therefore, in this solution, the air electric heater 9 is arranged before the ammonia enters the pipeline to make the overall stability higher.

[0056] The combustion chamber is made of high temperature resistant and corrosion resistant materials, which can withstand the heat load and chemical corrosion generated by high temperature combustion. The one-way valve 10 prevents the backflow of gas, ensuring the stability and safety of the combustion process. The secondary cooling air system B introduces room temperature air through a special pipeline system to purge and cool the flame tube, reduce the flame tube temperature, and ensure the stable operation of the burner. At the same time, the optimized cooling structure and materials are used, such as increasing the heat dissipation area and using high temperature resistant materials, to further improve the cooling effect.

[0057] The system in this embodiment achieves precise control of the gas flow and pressure of each channel through devices such as pressure reducing valves, mass flow controllers, stop valves, flow meters and proportional control valves, which ensures the stable combustion of ammonia under high pressure and oxygen-rich conditions and improves combustion efficiency.

[0058] Precise control of gas flow and pressure is the key to achieving efficient combustion and stable operation of the system. By adjusting the parameters of each device, the system can dynamically adjust the gas flow and pressure according to actual working conditions, ensuring the best combustion state and reducing energy waste and emissions.

[0059] Oxygen-enriched combustion technology improves combustion efficiency, but high temperatures may also damage the burner. Therefore, the system is designed with a two-stage cooling air system to purge and cool the flame tube with room temperature air to ensure stable operation of the burner under high temperature conditions.

[0060] The combination of oxygen-enriched combustion and high-temperature cooling not only improves combustion efficiency but also protects the burner from high-temperature damage. The optimized design of the secondary cooling air system, such as increasing the heat dissipation area and using high-temperature resistant materials, further improves the cooling effect and burner stability.

[0061] Ammonia as fuel only produces nitrogen and water as combustion products, without any carbon emissions, which helps reduce carbon emissions and achieve environmental protection goals. At the same time, the system achieves efficient use of energy and reduces energy consumption by precisely controlling gas flow and pressure.

[0062] Ammonia is a clean fuel with no carbon emissions from its combustion products, which has significant environmental advantages. The system achieves efficient energy utilization and low carbon emissions through optimization algorithms and precise control technology. In addition, the system also uses advanced emission control technologies, such as tail gas purification devices, to further reduce the content and harm of emissions, in line with the concept of green and sustainable development.

[0063] The ammonia oxygen-enriched high-pressure combustion experimental system provided in this embodiment achieves stable combustion and efficient utilization of ammonia under high-pressure and oxygen-enriched conditions by precisely controlling gas flow and pressure, adopting oxygen-enriched combustion technology and a secondary cooling air system. At the same time, the system is also highly flexible and scalable, and can adapt to the needs of combustion experiments of different scales. In addition, the system is equipped with complete safety protection measures and environmental protection and energy-saving technologies to ensure the safety, reliability, environmental protection and energy saving of the experimental process.

[0064] The system in this embodiment achieves stable combustion of ammonia under high pressure and oxygen-rich conditions by precisely controlling the flow and pressure of each gas and adopting oxygen-enriched combustion technology, thereby improving combustion efficiency.

[0065] Improving combustion efficiency is one of the core goals of system design. By precisely controlling the flow and pressure of each gas, the system can ensure the stable combustion of ammonia under high pressure and oxygen-rich conditions. At the same time, oxygen-enriched combustion technology can significantly increase the combustion speed and combustion temperature, thereby further improving the combustion efficiency. These measures work together to significantly improve the combustion efficiency of the system. In addition, the system also uses advanced burner design and optimization technologies, such as increasing the combustion area and optimizing the combustion chamber structure, to further improve the combustion efficiency and thermal efficiency.

[0066] At the same time, the secondary cooling air system B uses room temperature air to purge and cool the flame tube, effectively preventing high temperature from damaging the burner and ensuring stable operation of the burner.

[0067] Ensuring stable operation of the burner is another important goal of the system design. High temperature is an inevitable problem in the combustion process, but high temperature may also cause damage to the burner. To solve this problem, the system is designed with a two-stage cooling air system B. This system introduces room temperature air into the combustion chamber through a special pipeline system to purge and cool the flame tube. The cooling air exchanges heat with the heat generated by combustion, reducing the temperature of the flame tube, thereby ensuring the stable operation of the burner. In addition, the system also uses advanced thermal protection technology and materials, such as adding a thermal protection layer and using high-temperature resistant materials, which further improves the high-temperature resistance and stability of the burner.

[0068] At the same time, the system not only achieves efficient use of energy by precisely controlling gas flow and pressure, but also significantly reduces energy consumption, improving the economy and environmental friendliness of the overall system. (The core of this precise control system is that it can dynamically adjust the flow ratio of each gas component according to actual working conditions to ensure that the combustion process is both sufficient and energy-saving. Through the optimization algorithm, the system can predict and adjust to the optimal combustion state, reduce unnecessary energy waste, and reduce emissions, which is in line with the concept of green and sustainable development.)

[0069] The specific working principle of this embodiment is as follows:

[0070] 5.1 Gas pretreatment, the air compressor 4 provides compressed air with a pressure of about 1.2MPa. The air is first reduced in pressure and stabilized by the pressure reducing and stabilizing valve 5 to ensure that the output pressure is stable at 0.8MPa, laying the foundation for subsequent precise control. The main air is then controlled by the combination of the stop valve 6, the flow meter 7 and the proportional control valve 8 to achieve accurate flow measurement and on-demand adjustment. At the same time, the high-pressure oxygen from the oxygen cylinder 1 first passes through the pressure reducing valve 2 to reduce the pressure to 1MPa, and then is finely adjusted by the mass flow controller 3 to ensure the accuracy and stability of the oxygen flow. (The mass flow controller 3 adopts advanced sensing technology, which can monitor and adjust the oxygen flow in real time, and can maintain high accuracy even in a small flow range, providing reliable gas conditions for oxygen-enriched combustion.

[0071] 5.2 Heating of oxygen-enriched air. The oxygen-mixed main air then enters the air electric heater 9 and is heated to 300 degrees Celsius. This process greatly improves the activity of the air, which is beneficial to the subsequent combustion reaction. (The air electric heater 9 adopts an efficient and energy-saving design, with a built-in intelligent temperature control system, which can automatically adjust the heating power according to the set temperature, ensuring heating efficiency and avoiding energy waste.) The heated oxygen-enriched air is fully premixed with the high-pressure ammonia from the ammonia cylinder 14 in the premixing device, providing a high-quality fuel-air mixture for the combustion process.

[0072] 5.3 Combustion and cooling, the premixed main combustion stage premixed gas A passes through the one-way valve 10 and enters the combustion chamber for efficient combustion, releasing a large amount of heat energy. (The design of the one-way valve 10 prevents the backfire phenomenon in the combustion chamber and ensures the safe operation of the system.) At the same time, the secondary cooling air B passes through another pipeline, passes through the stop valve 11, flow meter 12 and proportional control valve 13 in turn, and enters the combustion chamber to cool the flame tube. (The introduction of the secondary cooling air B not only effectively reduces the temperature of the flame tube and prevents material damage caused by high temperature, but also recovers part of the heat energy through heat exchange, improving the overall energy efficiency of the system.)

[0073] 5.4 System control and monitoring. The system is equipped with an advanced control and monitoring system. The system integrates high-precision sensors and intelligent control algorithms, and can monitor key parameters such as the flow rate (such as flow meters 7 and 12) and pressure of each gas, as well as the temperature of the combustion chamber in real time. Through the real-time feedback of these data, the control system can respond quickly and accurately adjust the gas flow and pressure to ensure the stability and efficiency of the combustion process. At the same time, the monitoring system also has a fault self-diagnosis function, which can promptly detect and handle abnormal situations, such as gas leakage, abnormal pressure, etc., to ensure the long-term safe operation of the system.

[0074] Embodiment 1: This embodiment provides a specific solution, which includes the following steps:

[0075] Step 1: The required air is provided by the air compressor with a pressure of about 1.2MPa. After passing through the pressure reducing and stabilizing valve, the pressure is stabilized at 0.8MPa to supply the main air and secondary cooling air.

[0076] Step 2: The maximum flow rate of the secondary cooling air is about 450g / s. After the flow rate is regulated and switched through the stop valve, flow meter and proportional control valve, it enters the combustion chamber to play a cooling role.

[0077] Step 3: The maximum flow rate of main air is about 550g / s, which is mixed with oxygen after flow regulation and flow switch are realized through stop valve, flow meter and proportional control valve.

[0078] Step 4: The maximum flow rate of oxygen is 40g / s. The high-pressure oxygen provided by the oxygen cylinder first passes through a pressure reducing valve to reduce the pressure to 1MPa, and then enters the main air for mixing after precise flow regulation by a mass flow controller.

[0079] Step 5: The main air mixed with oxygen enters the air electric heater and is heated to 300 degrees Celsius.

[0080] Step 6: The maximum flow rate of ammonia is 80g / s. The high-pressure ammonia provided by the ammonia tank first passes through a pressure reducing valve to reduce the pressure to 1MPa, and then is precisely adjusted by a mass flow controller before being premixed with the oxygen-enriched main air heated by an electric heater.

[0081] Step 7: The maximum flow rate of the premixed main combustion stage premixed gas is 600g / s. The gas enters the combustion chamber for combustion after passing through the one-way valve.

[0082] The gas pressures in each channel of the ammonia high-pressure oxygen-enriched combustion test system are stable and the flow rates are easy to control.

[0083] A secondary air system is provided to cool the flame tube, which can meet the requirements of conducting experiments under higher temperature conditions.

[0084] The oxygen and ammonia gas supply part consists of a gas tank, a pressure reducing valve and a mass flow controller. The pressure is stable and the oxygen concentration and fuel flow can be automatically and accurately controlled.

[0085] The main circuit is composed of an air compressor, a pressure-stabilizing and reducing valve, a stop valve, a flow meter and a proportional regulating valve. It is designed to pass a large flow of air below 1000g / s for the total main circuit and secondary cooling air. It has a simple structure, stable pressure and easy flow control.

[0086] Small flow rates are precisely regulated using a pressure reducing valve and a mass flow controller, while large flow rates are regulated using a stop valve, flow meter and proportional control valve. This ensures that flow regulation accuracy is met while effectively saving costs.

[0087] In the embodiment, the synergy of each component and the flexibility of system design are further emphasized. For example, by the combined use of pressure reducing valves 2, 15 and mass flow controllers 3, 16, not only the precise control of the flow rates of oxygen and ammonia is achieved, but also the stability and reliability of gas supply under different working conditions are guaranteed. At the same time, the design of the secondary cooling air B not only meets the cooling requirements under high temperature conditions, but also realizes the fine control of the combustion process through reasonable flow distribution and regulation, thereby improving the overall performance and adaptability of the system. In addition, the entire system has a compact structure, is easy to maintain and upgrade, and provides a broad space for future expansion and application.

[0088] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An ammonia oxygen-enriched high-pressure combustion experimental system, characterized in that: include: An oxygen supply system for supplying a specific amount of high-pressure pure oxygen; A compressed air supply system is used to provide compressed air, and the provided air is divided into two streams, one of which is mixed with pure oxygen to adjust the concentration of pure oxygen; An electric air heater, which is used to preheat the mixed compressed air and pure oxygen; An ammonia supply system, which is used to supply a specific amount of high-pressure ammonia and mix it with preheated compressed air and pure oxygen gas; The combustion chamber is used for reacting and burning a mixture of ammonia, compressed air and pure oxygen, and the side wall of the combustion chamber is also connected to another stream of compressed air in the compressed air supply system to achieve cooling and heat exchange.

2. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The oxygen supply system specifically comprises: Oxygen cylinders, used to store liquid oxygen and provide high-pressure oxygen; The pressure reducing valve is connected to the oxygen cylinder to reduce the oxygen pressure to 0.9-1.2MPa; The mass flow controller, connected after the pressure reducing valve, is used to accurately regulate the flow of oxygen.

3. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The compressed air supply system specifically comprises: Air compressor, used to provide high-pressure compressed air; The pressure regulating valve is connected to the air compressor to stabilize the pressure of the compressed air and control the compressed air at 0.8-1.1MPa; Stop valve, used to control the on and off of the main air; Flow meter, used to monitor the flow of main air in real time; The proportional control valve is used to adjust the mixing ratio of main air and oxygen according to experimental requirements.

4. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The ammonia supply system specifically comprises: Ammonia tank, used to store liquid ammonia and provide high-pressure ammonia gas; The pressure reducing valve is connected to the ammonia tank to reduce the ammonia pressure to 0.9-1.2MPa; The mass flow controller, connected after the pressure reducing valve, is used to accurately adjust the flow rate of ammonia.

5. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The combustion chamber is made of high temperature resistant and corrosion resistant materials.

6. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The side wall of the combustion chamber is connected with a secondary cooling air system, which includes a stop valve, a flow meter and a proportional regulating valve, and is used to control the flow and pressure of the cooling air to achieve cooling of the combustion chamber flame tube.

7. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 6, characterized in that: The secondary cooling air system uses room temperature air to purge and cool the flame tube, and further improves the cooling effect and the stability of the burner by increasing the heat dissipation area, using high temperature resistant materials and other optimized designs.

8. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: The system also includes a control and monitoring system for real-time monitoring and adjusting parameters such as the flow rate and pressure of each gas and the temperature of the combustion chamber to ensure accurate control and safe operation of the experimental process.

9. The ammonia oxygen-enriched high-pressure combustion experimental system according to claim 1, characterized in that: A one-way valve is arranged on the pipeline entering the combustion chamber, and a flame arrester is arranged inside the one-way valve to prevent the gas from flowing back and ensure the stability and safety of the combustion process.

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