An ammonia fuel atmospheric combustion device and a control method thereof

Abstract

The present disclosure relates to an ammonia fuel atmospheric combustion device, comprising a burner, the burner comprising an injection assembly, the injection assembly comprising a nozzle, a suction contraction pipe, a mixing pipe and a diffuser pipe in sequence; the outer side of the diffuser pipe forms a combustion area; the ammonia fuel atmospheric combustion device further comprises an electric field generating assembly, a tail gas collecting assembly and a thermoelectric power generation assembly; the electric field generating assembly comprises a positive electrode plate and a negative electrode plate, and is used for generating an electric field at the combustion area; the gas inlet of the tail gas collecting assembly faces the combustion area, the gas outlet faces the thermoelectric power generation assembly, and the tail gas serves as a heat source of the thermoelectric power generation assembly; the thermoelectric power generation assembly forms a passage with the electric field generating assembly; through the setting of the electric field generating assembly, the ammonia fuel atmospheric combustion device of the present disclosure is adapted to the combustion characteristics of ammonia fuel; the present disclosure also provides a control method for the ammonia fuel atmospheric combustion device, and reasonable control of the ammonia fuel atmospheric combustion device is realized through the control method.

Description

Technical Field

[0001] This disclosure relates to the field of burner technology, specifically to an ammonia fuel atmospheric combustion device and its control method. Background Technology

[0002] Patent CN115468163A discloses a low-NOx burner for ammonia fuel and its operating method, including a combustion mechanism consisting of a push-pullable central nozzle, an inner ring nozzle, and an outer ring nozzle, used to change the distance the nozzle extends into the combustion chamber; a combustion chamber, the front end of which is connected to the combustion mechanism via a flange, the combustion chamber being divided into a rich combustion zone, a quenching zone, and a lean combustion zone from the front end to the rear end, with several secondary air ventilation holes arranged along its circumferential and axial directions on the wall of the quenching zone; a secondary air box, which is fitted onto the combustion chamber to form a secondary air channel, the front end of which is a secondary air inlet, the secondary air being evenly distributed within the secondary air channel after passing through a first swirl vane; a retainer, which is slidably fitted onto the combustion chamber for adjusting the secondary air inlet position; and a first swirl vane, which is fixedly arranged along the circumferential direction on the outer wall of the front end of the combustion chamber.

[0003] Its working method is as follows: Before starting, adjust the length of the center nozzle extending into the combustion chamber; reduce the distance between the center nozzle and the outlet of the inner ring nozzle, inject methane-air mixture into the combustion chamber through the center fuel pipe and ignite it; after the center flame is stably burning, it will act as an ignition flame to ignite the ammonia / air combustible mixture injected into the combustion chamber through the inner ring nozzle; after the inner layer fuel is stably burning, stop the fuel supply from the center fuel pipe and push the inner ring nozzle into the combustion chamber.

[0004] When it is necessary to increase the combustion load, the fuel supply of the outer ring nozzle is turned on, and the distance between the inner and outer ring nozzles is changed so that the inner flame ring ignites the outer fuel.

[0005] When it is necessary to further increase the combustion load, the fuel supply of the central fuel pipe is restarted and the fuel is changed to ammonia / air premixed gas. The distance from the first and second discs to the combustion chamber inlet is adjusted. According to the fuel flow and furnace structure, the main combustion zone torch, which consists of the central flame, inner flame ring and outer flame ring, is adjusted to a "V" or "W" shape.

[0006] When the combustion load is gradually increased from the ignition state and the outer ring nozzle and central fuel pipe are opened, or when the combustible composition of the primary air changes, adjust the position of the ferrule and inject secondary air into the end of the flare in the fuel-rich zone.

[0007] The aforementioned patent provides a low-NOx burner and its operating method, which ensures complete fuel combustion and controls NOx emissions by forming a reasonable distribution of three zones—rich fuel, rapid cooling, and lean fuel—within the combustion chamber. However, the aforementioned patent still has the following drawbacks:

[0008] Although the aforementioned patents achieve complete combustion of ammonia fuel and reduce nitrogen oxide emissions through reasonable combustion chamber design and mixing ammonia fuel with other fuels for ignition, they do not treat the emitted nitrogen oxides, effectively utilize the waste heat of the exhaust gas generated by ammonia fuel combustion, and fail to solve the problem of pure ammonia fuel combustion. Summary of the Invention

[0009] In order to solve the problems existing in the prior art, the present disclosure aims to provide an ammonia fuel atmospheric combustion device that, while ensuring the combustion efficiency of ammonia fuel, utilizes the waste heat of the exhaust gas generated by ammonia fuel combustion and addresses the problem of nitrogen oxide treatment generated by ammonia fuel combustion.

[0010] The present disclosure discloses an ammonia fuel atmospheric combustion device, which includes a burner, the burner including an ejector assembly, the ejector assembly including a nozzle, an intake contraction tube, a mixing tube and a diffuser tube connected in sequence;

[0011] A combustion zone is formed outside the outlet of the diffuser; characterized in that the ammonia fuel atmospheric combustion device further includes an electric field generating component, a tail gas collecting component, and a thermoelectric power generation component;

[0012] The electric field generating component includes a positive electrode plate and a negative electrode plate, which are used to generate an electric field in the combustion zone when energized.

[0013] The exhaust gas collection assembly has its gas collection port facing the combustion zone; the exhaust gas collection assembly has its gas outlet facing the thermoelectric generator.

[0014] The thermoelectric generator and the electric field generator form a circuit. The exhaust gas generated by the combustion of ammonia fuel is collected by the exhaust gas collection component and used as the heat source of the thermoelectric generator.

[0015] Preferably, the negative electrode plate is a plate-shaped electrode, the negative electrode plate is disposed at the outlet of the diffuser tube, and the negative electrode plate has a clearance hole formed at the location corresponding to the outlet of the diffuser tube; the positive electrode plate is disposed opposite to the negative electrode plate.

[0016] Preferably, the positive electrode plate is a ring electrode.

[0017] Preferably, the distance H between the positive electrode plate and the negative electrode plate satisfies:

[0018] 8cm≤H≤10cm.

[0019] Preferably, the average electric field strength E of the electric field satisfies:

[0020] 60kV / m≤E≤200kV / m.

[0021] Preferably, the ammonia fuel atmospheric combustion device further includes an exhaust gas treatment component;

[0022] The exhaust gas treatment assembly includes an exhaust gas absorption tank and an activated carbon adsorption assembly. The exhaust gas absorption tank is connected to the combustion zone, and the activated carbon adsorption assembly is connected to the exhaust gas absorption tank.

[0023] Preferably, the exhaust gas absorption tank includes an alkaline solution tank; the alkaline solution tank includes a sodium hydroxide solution or a sodium carbonate solution.

[0024] Preferably, the concentration of the sodium hydroxide solution is expressed as a mass fraction s1, and the concentration of the sodium carbonate solution is expressed as a mass fraction s2.

[0025] The condition s1 satisfies:

[0026] 2% ≤ s1 ≤ 5%;

[0027] The condition s2 satisfies:

[0028] 15% ≤ s² ≤ 20%.

[0029] Preferably, the burner is made of austenitic steel.

[0030] This disclosure also provides a control method for the ammonia fuel atmospheric combustion device as described above, wherein the electric field generating component is externally connected to an AC power source; the external power source is connected in series with the thermoelectric generator component, and the AC frequency f satisfies:

[0031] 5kHz≤f≤30kHz;

[0032] After ammonia fuel enters the burner, the ammonia fuel is ignited and the electric field generating component is started; when it is necessary to increase the flame propagation speed, flame width and flame height, the voltage and / or frequency of the AC power supply is increased.

[0033] The advantages of the ammonia fuel atmospheric combustion device and its control method disclosed herein are as follows:

[0034] By setting up the electric field generating component, the combustion efficiency of ammonia fuel is ensured and the generation of nitrogen oxides is reduced. The exhaust gas treatment component, the energy-concentrating component, and the thermoelectric generator component absorb and treat the nitrogen oxides in the exhaust gas generated by the combustion of ammonia fuel. Through the cooperation of the energy-concentrating component and the thermoelectric generator component, the waste heat of the exhaust gas and the heat generated by treating nitrogen oxides are converted into electrical energy, which is then utilized by the electric field generating component, so that the electric field generating component can continue to promote the combustion of ammonia fuel. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an ammonia fuel atmospheric combustion device as described in this disclosure;

[0036] Figure 2 This is a schematic diagram of the burner and electric field generating device described in this disclosure;

[0037] Figure 3 This is a perspective view of the ejector assembly described in this disclosure.

[0038] Explanation of reference numerals in the attached diagram: 1-nozzle, 2-intake contraction tube, 3-mixing tube, 4-diffuser tube, 5-positive electrode plate, 6-negative electrode plate, 7-exhaust gas collection assembly. Detailed Implementation

[0039] exist Figure 1 In the connection relationship between positive electrode plate 5, power supply, thermoelectric generator, and exhaust gas collection assembly, the dashed line represents the gas flow path, and the solid line represents the circuit connection.

[0040] like Figures 1-3 As shown, the disclosed ammonia fuel atmospheric combustion device includes a burner, which includes an ejector. The ejector includes a nozzle 1, an intake contraction pipe 2, a mixing pipe 3, and a diffuser pipe 4 connected in sequence. A combustion zone is formed outside the outlet of the diffuser pipe 4.

[0041] An electric field generating component is installed in the combustion zone. The electric field generating component includes a positive electrode plate 5, a negative electrode plate 6, and a power source. The power source is electrically connected to the positive electrode plate 5 to provide voltage to the positive electrode plate 5, thereby generating an electric field between the positive electrode plate 5 and the negative electrode plate 6. The electron activity and ion concentration in the flame will be affected by the electric field. As electrons near the negative electrode in the combustion zone will move rapidly towards the positive electrode, positive ions will move towards the negative electrode and gather to form an ion wind. The flame front will be deflected towards the negative electrode. Thus, through the action of the electric field force, the ammonia fuel will have a higher temperature during combustion.

[0042] At the same time, the electric field can increase the combustion speed, reaction rate and ion concentration in the flame, and also increase the amount of ammonia vaporization in the equipment, thereby making the burner more efficient and powerful.

[0043] To ensure the electric field has the best effect on promoting the flame, it should be ensured that the electric field generated by the electric field generating component covers the entire combustion area.

[0044] After the ammonia fuel is burned, the exhaust gas still has residual heat. Making reasonable use of the exhaust gas residual heat can also make the ammonia fuel atmospheric combustion device disclosed in this disclosure more environmentally friendly.

[0045] Therefore, an exhaust gas collection component 7 and a thermoelectric generator component are added. The exhaust gas collection component 7 includes an exhaust gas collection pump. The gas collection port of the exhaust gas collection pump faces the combustion zone, and the gas outlet of the exhaust gas collection pump faces the thermoelectric generator component. The exhaust gas generated after the combustion of ammonia fuel is pumped into the pipeline by the exhaust gas collection pump and guided to the thermoelectric generator component.

[0046] The thermoelectric generator includes a thermoelectric generator plate. The thermoelectric generator and the electric field generator form a passage. The exhaust gas is guided by the exhaust gas collection component 7 and passes through the heat source end of the thermoelectric generator.

[0047] Thermoelectric generators use the waste heat of exhaust gas as a heat source and room temperature as a cold source. Since the temperature of the exhaust gas produced by the combustion of ammonia fuel has a large temperature difference compared with the room temperature, the thermoelectric generator can use this temperature difference to generate electricity. The thermoelectric generator and the electric field generating component form a circuit. The thermoelectric generator uses the temperature difference between the waste heat of the exhaust gas and the room temperature to generate electricity, and then transmits the electricity to the electric field generating component through the circuit to help the electric field generating component form an electric field to promote the combustion of ammonia fuel.

[0048] Furthermore, ammonia fuel is discharged from the outlet of diffuser 4 and ignited. The direction of the flame during combustion is the same as the axis of diffuser 4, such as... Figure 2 In the ammonia fuel atmospheric combustion device shown, the positive electrode plate 5 and the negative electrode plate 6 of the electric field generating component are respectively set at both ends of the combustion direction. That is, the negative electrode plate 6 is set at the gas outlet of the diffuser tube 4, and the positive electrode plate 5 is set opposite to the negative electrode plate 6. According to the flame direction, the emitting plate surface of the positive electrode plate 5 faces the gas outlet of the diffuser tube 4, and the negative electrode plate 6 is set opposite to the positive electrode plate 5. The negative electrode plate 6 is a plate-shaped electrode. Since the negative electrode plate 6 is set at the gas outlet of the diffuser tube 4, a clearance hole is formed on the negative electrode plate 6 at the corresponding position of the gas outlet to avoid the negative electrode plate 6 affecting the gas outlet and combustion of ammonia fuel.

[0049] Furthermore, to prevent the flame from contacting the electrode plate during ammonia combustion and affecting the electric field generating component, the positive electrode plate 5 is selected as an annular electrode while ensuring that the positive electrode plate 5 and the flame do not come into contact with each other. Since the negative electrode plate 6 will not come into contact with the flame, in order to ensure that the electric field generating component covers the entire combustion area, the negative electrode plate 6 can be selected as a plate electrode. Since the negative electrode plate 6 is located at the outlet of the diffuser tube 4, the negative electrode plate 6 needs to have a clearance hole formed at the corresponding position of the outlet of the diffuser tube 4 to ensure that the ammonia fuel can be smoothly output from the outlet of the diffuser tube 4 and ignited normally.

[0050] The positive electrode plate is selected as a ring electrode, which can ensure that the electric field is generated normally to promote the combustion of ammonia fuel, and can also avoid the positive electrode plate being affected by the flame of ammonia fuel combustion. At the same time, the positive and negative electrode plates cover the entire combustion area, so that the entire combustion area can be affected by the electric field, resulting in a more uniform combustion effect of ammonia fuel.

[0051] Furthermore, to ensure sufficient stability of the electric field generating component, while selecting a ring-shaped electrode for the positive electrode plate 5, the distance H between the positive electrode plate 5 and the negative electrode plate 6 is controlled to satisfy:

[0052] 8cm≤H≤10cm, preferably 10cm;

[0053] Since the negative electrode plate 6 is located at the outlet of the diffuser tube 4, fixing the negative electrode plate 6 at the outlet of the diffuser tube 4 means that the larger the distance between the positive electrode plate 5 and the negative electrode plate 6, the farther away the positive electrode plate 5 is. Because the electric field strength is related to the electrode plate distance and voltage, it is necessary to ensure that the positive electrode plate 5 is positioned within a reasonable range. If the distance is too small, it will be difficult to ensure that the ammonia fuel can easily contact the positive electrode plate 5 during combustion, and even if a ring electrode is used, the temperature around the flame will affect the working condition of the positive electrode plate 5. If the distance is too large, the voltage required to generate the required electric field strength will be too large, making it difficult to control and posing certain safety hazards. Therefore, the distance H between the positive electrode plate 5 and the negative electrode plate 6 is set between 8cm and 10cm. This ensures that the flame does not affect the working condition of the ring electrode, while the voltage required to generate the corresponding electric field strength is within a controllable range and easy to adjust. The preferred distance between the positive electrode plate 5 and the negative electrode plate 6 is 10cm, which facilitates calculation when adjusting the voltage.

[0054] Furthermore, the average electric field strength E of the electric field generating component must satisfy:

[0055] 60kV / m≤E≤200kV / m, preferably 200kV / m;

[0056] Increasing the electric field strength helps accelerate fuel ionization and plasma formation, promotes fuel mixing and combustion, thereby accelerating flame propagation speed and increasing flame height and width. High electric field strength also helps to stimulate electrochemical and ion reactions, further promoting fuel combustion. However, excessively high electric field strength can cause excessive ionization and electrochemicalization of ammonia fuel, exacerbating shock waves and turbulence in the combustion chamber, which may lead to flame instability and loss of stability. When the electric field strength generated by the electric field generating component in the ammonia fuel atmospheric combustion device described in this disclosure is between 60 kV / m and 200 kV / m, the electric field strength is positively correlated with the degree of ionization of ammonia fuel, and when the electric field strength is 200 kV / m, the flame propagation speed can be increased by up to 50% compared to the flame propagation speed without an electric field.

[0057] Furthermore, the products of complete combustion of ammonia are nitrogen and water, which are pollution-free fuels. However, under normal circumstances, ammonia cannot be completely burned. When ammonia fuel is not completely burned, it produces nitrogen oxides that are harmful to safety. Therefore, exhaust gas needs to be treated to prevent nitrogen oxides from harming the environment. Thus, an exhaust gas treatment component is added after the combustion zone.

[0058] The exhaust gas treatment assembly includes an exhaust gas absorption tank and an activated carbon adsorption assembly. The exhaust gas absorption tank is connected to the combustion zone, and the activated carbon adsorption assembly is connected to the exhaust gas absorption tank. The exhaust gas absorption tank is used to absorb nitrogen oxides produced by the incomplete combustion of ammonia fuel, while the activated carbon adsorption assembly has a high adsorption capacity for nitrogen dioxide and an oxidation capacity for nitrogen monoxide at low concentrations. Most of the nitrogen oxides are absorbed and converted by the exhaust gas absorption tank. Due to the absorption and treatment by the exhaust gas absorption tank, the concentration of nitrogen oxides in the exhaust gas is reduced, and the activated carbon adsorption assembly oxidizes the remaining nitrogen monoxide and adsorbs nitrogen dioxide.

[0059] By installing exhaust gas treatment components, nitrogen oxides produced by ammonia fuel combustion are absorbed, reducing the impact of ammonia fuel combustion exhaust gas on the environment and human health.

[0060] Furthermore, the exhaust gas absorption tank includes an alkaline tank. Since nitric oxide is easily oxidized to nitrogen dioxide at room temperature, and nitrogen dioxide dissolves in water to generate nitric acid and nitric oxide, nitric oxide is further oxidized to nitrogen dioxide, or reacts chemically with oxygen and water to generate nitric acid, or reacts chemically with nitrogen dioxide and water to generate nitrous acid. Regardless of whether nitric acid or nitrous acid is generated, it is finally neutralized in the alkaline tank to absorb and convert nitrogen oxides.

[0061] The alkaline solution tank contains either sodium hydroxide solution or sodium carbonate solution, preferably sodium hydroxide solution. Sodium hydroxide is a strong base, and in the neutralization reaction with nitrous acid and nitric acid, it produces sodium nitrite or sodium nitrate. Sodium carbonate is less alkaline than sodium hydroxide, but because carbonate is a weak acid anion, its degree of ionization is smaller than that of nitrous acid and nitrate. Therefore, the reaction between sodium carbonate and nitrous acid can proceed to produce sodium nitrite or sodium nitrate, along with water and carbon dioxide.

[0062] Furthermore, when using alkaline solution to absorb nitrogen oxides produced by ammonia fuel combustion, it is necessary to determine the most suitable absorption concentration, calculated as a mass fraction. If the solution in the alkaline solution tank is a sodium hydroxide solution, then the concentration of the sodium hydroxide solution is expressed as a mass fraction s1, where s1 satisfies:

[0063] 2% ≤ s1 ≤ 5%; preferably 2%;

[0064] If the solution in the alkaline tank is a sodium carbonate solution, then the concentration of the sodium carbonate solution is expressed as a mass fraction s², and s² satisfies:

[0065] 15% ≤ s2 ≤ 20%; preferably 15%;

[0066] When a 2% sodium hydroxide solution is used as the solution in the alkaline pool to absorb nitrogen oxides, the absorption rate can reach 96%, and within the above-mentioned mass fraction range, the absorption rate decreases slightly as the mass fraction increases.

[0067] When a 15% sodium carbonate solution is used as the solution in the alkaline pool to absorb nitrogen oxides, the absorption rate reaches 81%; and within the above-mentioned mass fraction range, the absorption rate decreases as the mass fraction increases.

[0068] In summary, the solution in the alkaline solution tank is preferably a 2% sodium hydroxide solution.

[0069] Furthermore, the burner is made entirely of austenitic steel to prevent ammonia fuel from corroding the burner and damaging its structure.

[0070] The working process of the ammonia fuel atmospheric combustion device described in this disclosure is as follows:

[0071] Ammonia fuel is mixed with air through the ejector assembly and enters the ejector assembly. The mixture of ammonia fuel and air is output from the outlet of the diffuser tube 4 and ignited. The electric field generating assembly is turned on, and the power supply generates an electric field between the positive electrode plate 5 and the negative electrode plate 6. Under the action of the electric field, the fuel molecules are ionized and collide with electrons and ions to form plasma. At the same time, due to the influence of the electric field, the ions and plasma in this environment move in a directional manner, thereby forming ion peaks, promoting the mixing of ammonia fuel and air, and thus improving the combustion efficiency of ammonia fuel.

[0072] After combustion, the exhaust gas is absorbed by the exhaust gas treatment component, and the waste heat of the exhaust gas is absorbed by the energy-concentrating component and converted into usable thermal energy, which serves as the heat source for the thermoelectric generator. The thermoelectric generator generates electricity under the temperature difference between the thermal energy of the energy-concentrating component and the room temperature. The electrical energy generated by the thermoelectric generator is converted into the potential energy of the electric field generating component, which continues to promote the combustion of ammonia fuel.

[0073] Furthermore, this disclosure proposes a control method for the ammonia fuel atmospheric combustion device as described above, as follows:

[0074] The ammonia fuel atmospheric combustion device is connected to an external AC power supply. This external AC power supply is connected in series with a thermoelectric generator, and together they are called a power generation module. The power generation module is connected in series with an electric field generating component. The AC frequency f satisfies:

[0075] 5kHz≤f≤30kHz;

[0076] A higher AC frequency will make the electric field distribution in the combustion chamber more uniform, promote the ionization and mixing of ammonia fuel, accelerate fuel combustion and improve combustion efficiency; when the AC frequency is between 5kHz and 30kHz, the combustion of the flame is positively correlated with the electric field frequency. Therefore, the higher the AC frequency, the stronger the effect of assisting flame combustion. Therefore, 30kHz AC is selected.

[0077] In use, ammonia fuel is introduced, and the ammonia fuel enters the intake contraction tube 2 from the nozzle 1 and mixes with air. The mixed gas enters the diffuser tube 4 through the mixing tube 3 and is output from the outlet of the diffuser tube 4, igniting the mixed gas. At the same time, the power supply of the electric field generating component is turned on. By adjusting the voltage of the AC power supply or the frequency of the AC power supply output current, the propagation speed, width and height of the flame can be adjusted.

[0078] By adjusting the voltage of the AC power supply, the electric field strength generated by the electric field generating component can be adjusted, thereby adjusting the combustion of the flame. Alternatively, by adjusting the frequency of the AC power supply, the combustion of the flame can be affected. Both of these methods can effectively adjust the flame combustion of ammonia fuel. Through these control methods, the combustion of ammonia fuel can be promoted, thereby reducing nitrogen oxides produced by incomplete combustion of ammonia fuel.

[0079] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0080] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims disclosed herein.

Claims

1. An ammonia fuel atmospheric combustion device, comprising a burner, the burner comprising an ejector assembly, the ejector assembly comprising a nozzle (1), an intake constriction tube (2), a mixing tube (3), and a diffuser tube (4) connected in sequence. A combustion zone is formed outside the outlet of the diffuser (4); characterized in that, The ammonia fuel atmospheric combustion device also includes an electric field generating component, a tail gas collection component (8), and a thermoelectric power generation component; The electric field generating component includes a positive electrode plate (6) and a negative electrode plate (7), which are used to generate an electric field in the combustion zone when energized; The exhaust gas collection assembly (8) has its gas collection port facing the combustion zone; the exhaust gas collection assembly (8) has its gas outlet facing the thermoelectric generator. The thermoelectric generator and the electric field generator form a passage. The exhaust gas generated by the combustion of ammonia fuel is collected by the exhaust gas collection component (8) and used as the heat source of the thermoelectric generator. The negative electrode plate (7) is a plate-shaped electrode. The negative electrode plate (7) is disposed at the outlet of the diffuser tube and has a clearance hole formed at the location corresponding to the outlet of the diffuser tube. The emitting plate surface of the positive electrode plate (6) faces the outlet of the diffuser tube and is disposed opposite to the negative electrode plate. The positive electrode plate (6) is a ring electrode.

2. The ammonia fuel atmospheric combustion device according to claim 1, characterized in that, The distance H between the positive electrode plate (6) and the negative electrode plate (7) satisfies: 8cm≤H≤10cm.

3. The ammonia fuel atmospheric combustion device according to claim 1, characterized in that, The average electric field strength E of the electric field satisfies: 60kV / m≤E≤200kV / m.

4. The ammonia fuel atmospheric combustion device according to claim 1, characterized in that, The description also includes an exhaust gas treatment component; The exhaust gas treatment assembly includes an exhaust gas absorption tank and an activated carbon adsorption assembly. The exhaust gas absorption tank is connected to the combustion zone, and the activated carbon adsorption assembly is connected to the exhaust gas absorption tank.

5. The ammonia fuel atmospheric combustion device according to claim 4, characterized in that, The exhaust gas absorption tank includes an alkaline solution tank; the alkaline solution tank includes a sodium hydroxide solution or a sodium carbonate solution.

6. The ammonia fuel atmospheric combustion device according to claim 5, characterized in that, The concentration of the sodium hydroxide solution is expressed as a mass fraction s1, and the concentration of the sodium carbonate solution is expressed as a mass fraction s2. The condition s1 satisfies: 2％≤s1≤5％； The condition s2 satisfies: 15％≤s2≤20％。 7. The ammonia fuel atmospheric combustion device according to claim 1, characterized in that, The burner is made of austenitic steel.

8. A control method for an ammonia fuel atmospheric combustion device as described in any one of claims 1-7, characterized in that, The electric field generating component is connected to an external AC power supply; the external AC power supply is connected in series with the thermoelectric power generation component, and the AC frequency f satisfies: 5kHz≤f≤30kHz; After the ammonia fuel enters the burner, it is ignited and the electric field generating component is started. When it is necessary to adjust the flame propagation speed, flame width, and flame height, increase the voltage and / or frequency of the AC power supply.

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