Jacketed ammonia-hydrogen co-combustion energy supply combustor and operation process thereof

Abstract

The invention discloses a jacket type ammonia-hydrogen co-combustion heat supply combustor and an operation process thereof. A fuel source is pure hydrogen or ammonia-hydrogen mixed gas. The combustor comprises a premixing cavity, a combustor base, a jacket type cooling structure, a temperature control system, a rotational flow stabilizing device and an ignition device, the jacket type cooling structure is composed of a combustor outer wall and a flame tube with spiral flow guide fins, air flows downwards in a spiral mode, and the combustor has the oxygen supply and cooling functions; the temperature control system regulates and controls air and fuel flow according to temperature through a temperature measuring device, a regulating valve and a controller, the rotational flow stabilizing device is composed of a rotational flow device, a flow guide pipe and a flow guide cover so as to strengthen flame stability, and the ignition device is used for safe ignition. According to the invention, hot tail gas generated by combustion supplies heat to rear-end equipment in a heat exchange manner; the device has the characteristics of high energy utilization rate, few pollutants, compact structure, high adaptability, active cooling of the combustor, stable combustion flame, stable and controllable energy supply temperature and the like.

Description

Technical Field

[0001] This invention relates to a jacketed ammonia-hydrogen co-firing burner and its operating process, belonging to the field of high-efficiency and clean combustion heating technology. Background Technology

[0002] To fundamentally address the resource constraints and environmental problems facing society as a whole, finding clean energy sources to replace traditional fossil fuels has become a crucial issue. Hydrogen, as one of many clean energy sources, has a high calorific value, produces no pollution from combustion products, and can be obtained through direct water electrolysis, making it considered an ideal energy storage medium for electricity. Meanwhile, ammonia (NH3), as a highly efficient hydrogen storage medium, is also an ideal clean energy source due to its high energy density, low liquefaction and transportation costs, carbon-free energy storage, and high safety.

[0003] Carbon-free ammonia energy has been actively researched and explored in recent years. However, the low combustion rate of ammonia severely limits its widespread application in practical burners, necessitating flame enhancement for ammonia. Hydrogen, with its rapid combustion rate, presents a good option for increasing the combustion rate of ammonia fuel without introducing carbon. Using ammonia-hydrogen co-combustion to replace traditional fossil fuels is an important research direction for achieving a low-carbon transition. It holds great research potential in fields such as industrial heat treatment, gas turbines for power generation, exhaust gas treatment, liquid fuel hydrogen production, and ammonia-hydrogen engines.

[0004] In recent years, with the continuous advancement of research on combustion technology, combustion mechanisms, and burners, current burners can meet various combustion requirements to a certain extent. However, existing burners suffer from problems such as poor compatibility with various system structures, complex structures making cooling difficult, and the need to improve flame stability. For example, in ammonia-to-hydrogen systems, excessively low combustion temperatures are detrimental to the forward ammonia decomposition reaction, while excessively high combustion temperatures can cause catalyst sintering. Therefore, how to stably control the ammonia decomposition reaction temperature, how to ensure stable combustion in the burner, how to efficiently cool the burner to prevent overheating during long-term operation, and how to reduce emissions of pollutants such as NOx have become problems that need to be solved. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this invention provides a jacketed ammonia-hydrogen co-firing burner and its operating process. The burner has an outlet temperature control system, an active cooling function for the cavity, and a flame flow stabilizer swirl generator to meet the heating needs of different scenarios.

[0006] The present invention adopts the following technical solution: A jacketed ammonia-hydrogen co-firing burner is provided. The high-temperature flue gas generated by combustion can be connected to an ammonia decomposition reactor to provide heat for the ammonia decomposition reaction, or it can be used for other heating needs such as working heat supply for purification membranes. At the same time, the residual hydrogen after ammonia decomposition and purification is mixed with the raw material ammonia for combustion.

[0007] A jacketed ammonia-hydrogen co-firing burner includes a premixing chamber, a burner base, a jacketed cooling structure, a temperature control system, a swirl stabilizing device, and an ignition device. The jacketed cooling structure includes a burner outer wall and a flame tube. The bottom of the burner outer wall is mounted on the burner base. The burner outer wall and the flame tube form a jacket. The outer wall of the flame tube is provided with spiral guide fins. Air enters the jacket through the air interface opened on the burner outer wall and flows spirally downward along the spiral guide fins to cool the combustion chamber while supplying oxygen for combustion. The temperature control system includes a temperature measuring device arranged on the burner, a regulating device for adjusting the air or fuel flow rate, and a controller for controlling the regulating device based on the temperature measured by the temperature measuring device. The swirl stabilizing device includes a swirler, a swirler fixing clip, a guide tube, and a guide shroud. The bottom of the guide tube is connected to a premixing chamber for receiving and premixing multiple fuels. The top of the guide tube passes through the burner base and is fixedly connected to it. The guide shroud is fitted over the top of the guide tube. The swirler is installed inside the top of the guide tube and fixed by the swirler fixing clip. The ignition device includes an igniter, and the burner base is provided with an igniter interface for installing the igniter. The flow guide is provided with a first arc notch for installing the igniter.

[0008] Furthermore, the top of the burner's outer wall is provided with an end cap, on which a combustion product outlet is opened. The top of the flame tube is a tapered opening, the top of which is connected to the end cap, and a gap is reserved between the bottom of the flame tube and the burner base.

[0009] Furthermore, the flame tube is provided with a first thermocouple interface, and a second thermocouple interface is provided at the combustion product outlet. The temperature measuring device is a thermocouple, which is inserted into the first thermocouple interface and the second thermocouple interface for temperature measurement.

[0010] Furthermore, the regulating device includes a first regulating valve for regulating air flow, a second regulating valve for regulating ammonia flow, and a third regulating valve for regulating hydrogen flow. The first regulating valve is located on the pipeline between the controller and the air interface, and the second and third regulating valves are located on the pipeline connecting the controller to the inlet of the premixing chamber.

[0011] Furthermore, a check valve and a flame arrester are also installed at the inlet of the premixing chamber.

[0012] Furthermore, the swirling blade angle of the hydrocyclone is 30° to 60°, and the swirling number is 0.432 to 1.296. The hydrocyclone is selected according to the inlet combustion gas requirements. The flare opening half-opening angle of the guide shroud is 35°, which is the optimal expansion angle. This protects the flame from air disturbance without damaging the swirling recirculation zone. The expansion ratio between the flame tube and the hydrocyclone outlet is 1.5.

[0013] Furthermore, when the temperature control system is operating, thermocouples located at three different positions inside the burner detect the temperature distribution within the burner. When the outlet temperature exceeds the set temperature value, the regulating valve for adjusting the air flow increases the flow rate, improves the air coefficient, and lowers the outlet temperature. Simultaneously, the regulating valve for the fuel gas inlet adjusts the inlet flow rate of the fuel gas according to the required power.

[0014] Furthermore, all thermocouple interfaces are designed with internal threads for connecting and sealing thermocouple ferrules. The thermocouple at the outlet monitors the burner outlet temperature for real-time temperature control. Thermocouples inside the combustion chamber monitor the chamber temperature to ensure combustion efficiency and reduce NOx generation.

[0015] Furthermore, the igniter interface is designed with internal threads for mounting and securing the silicon nitride ceramic igniter. Simultaneously, mounting it on the burner base reduces the need for openings in the flame tube and burner outer wall, minimizing gaps between mating parts, reducing the risk of leakage, and facilitating installation, disassembly, and replacement.

[0016] Furthermore, the check valve and flame arrester are installed before the fuel inlet. The fuel gas first passes through the check valve and flame arrester before entering the burner premixing chamber, preventing backfire and air backflow, and ensuring system safety.

[0017] Furthermore, the burner body has four fuel gas inlets and two air inlets. During operation, the number of fuel streams entering the burner can be freely adjusted at the bottom fuel gas inlets, or air can be introduced for partial premixed combustion. Excess inlets can be sealed with plugs. Different fuel gas streams are fully mixed in the premixing chamber, including pure hydrogen, ammonia-hydrogen mixture, or tail gas (including hydrogen and nitrogen) from ammonia decomposition and purification, as well as ammonia as a heat-supplementing feedstock. After mixing, the mixture enters upwards through the guide tube into the cyclone separator, where the flame is stably combusted within the combustion chamber. Air enters through the air inlets and flows downwards along the spiral space between the burner's outer wall and the flame tube. After passing the flame tube, it passes through the guide shroud and enters the combustion chamber to provide air for combustion.

[0018] Furthermore, during burner operation, after air enters through the air inlet, it first cools the flame tube. At the same time, the air is fully preheated before entering the combustion chamber, which improves combustion efficiency and achieves active cooling of the burner.

[0019] Furthermore, during burner operation, the outlet thermocouple monitors the outlet temperature in real time. If the temperature is detected to be too high and catalyst sintering may occur, the air regulating valve is controlled to increase the air flow and reduce the outlet temperature. This control loop has a simple control concept, rapid control response, and can adjust the burner outlet temperature in real time to meet temperature and heat requirements.

[0020] Furthermore, the cyclone separator creates a central recirculation zone for the fuel gas flow, which brings the high-temperature flue gas that has already been ignited by the flame back to the bottom of the flame to ignite the fuel entering the combustion chamber, thus forming stable combustion of the flame. At the same time, the addition of the cyclone separator can significantly shorten the flame length, making the burner structure more coordinated and easier to carry and transport.

[0021] Furthermore, the deflector not only prevents air from entering the combustion chamber and disrupting flame stability, but also provides a guiding function for the fluid at the swirler outlet, making the swirling flame more stable and the combustion more efficient.

[0022] Furthermore, the side of the flame tube is designed with spiral guide fins. The spiral guide fins are arranged in a double spiral pattern in the interlayer between the flame tube and the outer wall of the burner. A second arc notch is opened on them to enhance the heat exchange between the flame tube and the air and increase the active cooling effect. The double spiral can ensure the uniformity of the two air intakes. The staggered distribution increases the air flow time, increases the flow velocity, and at the same time disturbs the vortex and enhances the turbulence intensity. At the same time, the arc notch on the fins allows the air to flow freely between different fins, increases the turbulence performance of the flow, reduces air passage blockage, and enhances heat exchange. The second arc notch is an arc notch with a diameter of 2-4mm and the center offset to 33-35mm from the center.

[0023] An operating process for a jacketed ammonia-hydrogen co-firing burner includes the following steps: S1: Complete the connection between the burner and the gas supply line, and perform an airtightness test to confirm that there is no leakage; S2: Introduce non-flammable purging gas into the burner and continue purging for at least 1 minute; S3: Open the first regulating valve on the air line to introduce air into the burner; S4: After the first regulating valve is opened, the second and third regulating valves for introducing combustible gas are opened to introduce ammonia-hydrogen mixed gas into the burner, and the power supply of the igniter is turned on at the same time for ignition. S5: After confirming that the flame is stably ignited, disconnect the power supply to the igniter; S6: During burner operation, the control operating parameters must meet the following conditions: a) The input power of combustible gas shall not exceed 1kW; b) The flow velocity of the ammonia-hydrogen mixture at the outlet of the guide shroud above the cyclone separator of the burner shall not exceed 15 m / s; c) The excess air coefficient is not less than 1.5; d) The air velocity flowing through the annular gap between the deflector and the flame tube shall not be less than 5 m / s; e) The temperature of the burner top wall does not exceed 600℃.

[0024] The beneficial effects of this invention are: the burner is highly compatible with various heat exchange and regenerative systems; it is detachable and easy to install; it has high flame stability and adjustable power; it can be actively cooled and does not overheat during continuous operation; and it produces fewer pollutants. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the burner body and control circuit of the present invention; Figure 2 This is an external view of the burner body of the present invention; Figure 3 This is a schematic diagram of the internal structure and internal flow of the burner of the present invention; Figure 4 This is a detailed structural diagram of the hydrocyclone and outlet guide shield of the present invention; Figure 5 This is a cross-sectional view of the top of the guide tube of the present invention; Figure 6 This is a half-sectional view of the top of the burner of the present invention; Figure 7 This is the premixing cavity of the present invention; Figure 8 This is a partial half-sectional view of the burner body of the present invention; Figure 9 This is a part drawing of the flame tube and spiral guide fins of the present invention.

[0026] In the diagram: 1. Premixing chamber; 2. Burner base; 21. Igniter interface; 3. Burner outer wall; 31. Air interface; 32. End cap; 321. Combustion product outlet; 3211. Second thermocouple interface; 4. Flame tube; 41. Spiral guide fins; 411. Second arc notch; 42. Tapered opening; 43. First thermocouple interface; 5. Temperature measuring device; 6. Adjusting device; 61. First regulating valve; 62. Second regulating valve; 63. Third regulating valve; 64. Check valve; 65. Flame arrester; 7. Controller; 8. Swirl generator; 9. Swirl generator fixing clip; 10. Guide tube; 11. Guide shroud; 111. First arc notch; 12. Igniter. Detailed Implementation

[0027] In this invention, the serial numbers assigned to components, such as "first" and "second," are merely used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Example 1

[0031] like Figures 1 to 9 As shown, a jacketed ammonia-hydrogen co-firing burner includes a premixing chamber 1, a burner base 2, a burner outer wall 3, a flame tube 4, a temperature measuring device 5, an adjusting device 6, a controller 7, a cyclone separator 8, a cyclone separator fixing buckle 9, a guide pipe 10, a guide shroud 11, and an igniter 12.

[0032] like Figure 7 As shown, the premixing chamber 1 has four air intake channels on its four sides, each with threaded holes for connection to the fuel input pipe. The bottom of the guide pipe 10 is inserted into the premixing chamber 1 from above and welded thereto. Figure 5As shown, the top interior of the guide tube 10 has a stepped distribution for installing the hydrocyclone 8, and the top end has an internal thread for installing the hydrocyclone fixing clip 9. Figure 4 As shown, the top of the guide tube 10 passes through the through hole in the center of the burner base 2 and is welded to the burner base 2. The guide shroud 11 is fitted onto the top of the guide tube 10, and the cyclone separator 8 is installed inside the top of the guide tube 10 and fixed by the cyclone separator fixing clip 9. The burner base 2 is provided with an igniter interface 21 for installing the igniter 12, and the guide shroud 11 is provided with a first arc notch 111 reserved for installing the igniter 12; the cyclone separator 8 has a swirl blade angle of 45°, a swirl number of 0.748, and 12 swirl blades, and the flare half-open angle of the guide shroud 11 is 35°. like Figure 3 As shown, the bottom of the burner outer wall 3 is mounted on the burner base 2, and the burner outer wall 3 and the flame tube 4 form a sandwich, as shown. Figure 9 As shown, the spiral guide fins 41 have a second arc notch 411. The spiral guide fins 41 are arranged in a double spiral staggered distribution. The second arc notch 411 is an arc notch with a diameter of 4 mm and the center is offset to 33.5 mm from the center. The spiral guide fins 41 are welded to the outer wall of the flame tube 4. Air enters the interlayer through the air interface 31 opened on the outer wall 3 of the burner and flows spirally downward along the spiral guide fins 41, which is used to supply oxygen for combustion and cool the combustion chamber at the same time. The top of the outer wall 3 of the burner is provided with an end cap 32. The end cap 32 has a combustion product outlet 321 and is welded to it. The top of the flame tube 4 is a tapered opening 42. The top of the tapered opening 42 is welded to the end cap 32. The end cap 32 is threaded to the top of the outer wall 3 of the burner. The bottom of the flame tube 4 and the burner base 2 are reserved with a gap. The flame tube 4 is provided with a first thermocouple interface 43, and the combustion product outlet 321 is provided with a second thermocouple interface 3211 on the side. The expansion ratio of the flame tube 4 to the outlet of the cyclone 8 is 1.5.

[0033] like Figure 1 As shown, the temperature measuring device 5 is a thermocouple. The thermocouple is inserted into the first thermocouple interface 43 and the second thermocouple interface 3211 to measure the temperature. The measured temperature is fed back to the controller 7. The regulating device 6 includes a first regulating valve 61 for regulating the air flow, a second regulating valve 62 for regulating the ammonia flow, and a third regulating valve 63 for regulating the hydrogen flow. The first regulating valve 61 is located on the pipeline between the controller 7 and the air interface 31. The second regulating valve 62 and the third regulating valve 63 are located on the pipeline connecting the controller 7 and the inlet of the premixing chamber 1. After receiving the measured temperature, the controller 7 regulates the flow rates of air, ammonia, and hydrogen. The thermocouple, the controller 7, and the regulating valves together form a negative feedback temperature control loop. A check valve 64 and a flame arrester 65 are also provided at the inlet of the premixing chamber 1.

[0034] In this embodiment, the burner body is a double-layered cylindrical jacket structure. Under the action of the spiral guide fins 41, the air enters from the air interface 31 and flows spirally downward from the jacket between the outer wall 3 and the flame tube 4 of the burner, and enters the flame tube 4 of the burner at the bottom to participate in combustion.

[0035] Following the burner's flow direction, combustion gases H2, NH3, and inert gas N2 enter the premixing chamber 1 through the combustion gas inlet. After thorough mixing within the chamber, they are introduced into the guide pipe 10. Within the guide pipe 10, the mixture passes through the cyclone separator 8 to form a swirling flow, which then enters the flame tube 4 to participate in combustion. Simultaneously, the fourth port of the premixing chamber 1 can be plugged to prevent leakage; air can be introduced when air premixed combustion is required.

[0036] The width of the flame tube 4 is the same as the flame width at maximum power, while ensuring that it is not less than 1.5 times the flame outlet of the cyclone separator 8. This ensures that the flame will not be compressed and elongated under full power operation, thus ensuring safety.

[0037] The flame tube 4 is externally designed with spiral guide fins 41, each with a second arc-shaped notch 411. The fins are spirally distributed downwards in the interlayer between the flame tube 4 and the burner outer wall 3. The presence of the fins increases the heat exchange area between the air and the flame tube 4 as air flows through the interlayer. Simultaneously, the spiral guide fins 41 cause the airflow after entering the interlayer to primarily flow downwards in a rotating manner, making the air flowing over the surface of the flame tube 4 more uniform. The arc-shaped notches on the fins enhance the turbulence of the airflow. All these factors combined enhance the heat exchange capacity between the cold air and the flame tube, more effectively reducing the temperature of the flame tube 4 while improving the preheating efficiency of the air, thus aiding combustion. Two vertically distributed first thermocouple interfaces 43 are located on the side of the flame tube 4, concentric with the thermocouple mounting holes on the burner outer wall 3. After installation, a gap exists between the flame tube 4 and the burner base 2 to allow air circulation.

[0038] The burner outer wall 3 has internal threaded interfaces at both the top and bottom. The upper thread is threaded with the end cover 32, and the lower thread is threaded with the burner base 2. The threaded connections ensure a certain degree of airtightness and are also detachable, making installation convenient and transportation easy.

[0039] An operating process for a jacketed ammonia-hydrogen co-firing burner includes the following steps: S1: Complete the connection between the burner and the gas supply line, and perform an airtightness test to confirm that there is no leakage; S2: Introduce non-flammable purging gas into the burner and continue purging for at least 1 minute; S3: Open the first regulating valve 61 on the air pipeline to introduce air into the burner; S4: After the first regulating valve 61 is opened, the second regulating valve 62 and the third regulating valve 63 are opened to introduce combustible gas, and the ammonia-hydrogen mixture is introduced into the burner. At the same time, the power supply of the igniter 12 is turned on for ignition. S5: After confirming that the flame is stably ignited, disconnect the power supply to igniter 12; S6: During burner operation, the control operating parameters must meet the following conditions: a) The input power of combustible gas shall not exceed 1kW to prevent exceeding the maximum load of the burner; b) The flow velocity of the ammonia-hydrogen mixture at the outlet of the guide shroud 11 above the cyclone separator 8 shall not exceed 15 m / s to prevent the flame from being blown out by excessive flow velocity. c) The excess air coefficient is not less than 1.5 to ensure complete combustion, reduce combustion pollutants, and save fuel; d) The air velocity flowing through the annular gap between the guide shroud 11 and the flame tube 4 is not less than 5 m / s, so that the air is fully turbulent, which helps the air and fuel to mix quickly and evenly, thus achieving efficient and low-emission combustion. e) The temperature of the burner top wall does not exceed 600℃ to ensure the structural integrity and long-term reliability of the burner and prevent key metal components from undergoing oxidation, creep, or other strength degradation at high temperatures.

Claims

1. A jacketed ammonia-hydrogen co-firing burner, characterized in that, Includes a premixing chamber (1), a burner base (2), a jacketed cooling structure, a temperature control system, a swirl stabilizing device, and an ignition device; The jacketed cooling structure includes a burner outer wall (3) and a flame tube (4). The bottom of the burner outer wall (3) is mounted on the burner base (2). The burner outer wall (3) and the flame tube (4) form a jacket. The outer wall of the flame tube (4) is provided with spiral guide fins (41). Air enters the jacket through the air interface (31) opened on the burner outer wall (3) and flows spirally downward along the spiral guide fins (41) to cool the combustion chamber while supplying oxygen for combustion. The temperature control system includes a temperature measuring device (5) arranged on the burner, a regulating device (6) for regulating the air or fuel flow, and a controller (7) for controlling the regulating device (6) based on the temperature measured by the temperature measuring device (5). The swirling stabilizing device includes a swirler (8), a swirler fixing buckle (9), a guide tube (10), and a guide shroud (11). The bottom of the guide tube (10) is connected to a premixing chamber (1) for receiving and premixing multiple fuels. The top of the guide tube (10) passes through the burner base (2) and is fixedly connected to it. The guide shroud (11) is fitted on the top of the guide tube (10). The swirler (8) is installed inside the top of the guide tube (10) and fixed by the swirler fixing buckle (9). The ignition device includes an igniter (12), and the burner base (2) is provided with an igniter interface (21) for installing the igniter (12). The deflector (11) is provided with a first arc notch (111) reserved for installing the igniter (12).

2. The jacketed ammonia-hydrogen co-firing burner as described in claim 1, characterized in that, The top of the burner outer wall (3) is provided with an end cap (32), and the end cap (32) has a combustion product outlet (321). The top of the flame tube (4) is a tapered opening (42), and the top of the tapered opening (42) is connected to the end cap (32). The bottom of the flame tube (4) is reserved with a gap between it and the burner base (2).

3. A jacketed ammonia-hydrogen co-firing burner as described in claim 2, characterized in that, The flame tube (4) is provided with a first thermocouple interface (43) and a second thermocouple interface (3211) is provided at the combustion product outlet (321). The temperature measuring device (5) is a thermocouple, which is inserted into the first thermocouple interface (43) and the second thermocouple interface (3211) for temperature measurement.

4. A jacketed ammonia-hydrogen co-firing burner as described in claim 3, characterized in that, The regulating device (6) includes a first regulating valve (61) for regulating air flow, a second regulating valve (62) for regulating ammonia flow, and a third regulating valve (63) for regulating hydrogen flow. The first regulating valve (61) is located on the pipeline between the controller (7) and the air interface (31), and the second regulating valve (62) and the third regulating valve (63) are located on the pipeline connecting the controller (7) and the inlet of the premixing chamber (1).

5. A jacketed ammonia-hydrogen co-firing burner as described in claim 4, characterized in that, The inlet of the premix chamber (1) is also equipped with a check valve (64) and a flame arrester (65).

6. A jacketed ammonia-hydrogen co-firing burner as described in claim 4, characterized in that, The spiral guide fins (41) have a second arc notch (411). The spiral guide fins (41) are arranged in a double spiral pattern. The second arc notch (411) is an arc notch with a diameter of 2-4 mm and the center is offset to 33-35 mm from the center.

7. A jacketed ammonia-hydrogen co-firing burner as described in claim 4, characterized in that, The swirling blade angle of the hydrocyclone (8) is 30°-60°, the swirling number is 0.432-1.296, the flare opening half angle of the guide shroud (11) is 35°, and the expansion ratio of the flame tube (4) to the outlet of the hydrocyclone (8) is 1.

5.

8. An operating process for a jacketed ammonia-hydrogen co-firing burner as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Complete the connection between the burner and the gas supply line, and perform an airtightness test to confirm that there is no leakage; S2: Introduce non-flammable purging gas into the burner and continue purging for at least 1 minute; S3: Open the first regulating valve (61) on the air pipeline to introduce air into the burner; S4: After the first regulating valve (61) is opened, the second regulating valve (62) and the third regulating valve (63) for introducing combustible gas are opened, and the ammonia-hydrogen mixture is introduced into the burner. At the same time, the power supply of the igniter (12) is turned on for ignition. S5: After confirming that the flame is stably ignited, disconnect the power supply of the igniter (12); S6: During burner operation, the control operating parameters must meet the following conditions: a) The input power of combustible gas shall not exceed 1kW; b) The flow velocity of the ammonia-hydrogen mixture at the outlet of the upper guide shroud (11) of the cyclone separator (8) shall not exceed 15 m / s; c) The excess air coefficient is not less than 1.5; d) The air velocity flowing through the annular gap between the guide shroud (11) and the flame tube (4) shall not be less than 5 m / s; e) The temperature of the burner top wall does not exceed 600℃.

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