Arc torch combustion-supporting device and ammonia burner

Abstract

The invention discloses an arc torch combustion-supporting device and an ammonia burner, and relates to the field of combustion. The arc torch combustion-supporting device adopts liquid ammonia as a cooling medium, and comprises at least one pair of electrode pairs, at least one electrode of the electrode pair is provided with an electrode cooling module, the electrode cooling module is a hollow layer which is arranged on the electrode and allows the liquid ammonia to pass through, one end of the hollow layer is a liquid ammonia inlet, and the other end of the hollow layer is an ammonia gas or gas-liquid mixture outlet; ammonia gas or a gas-liquid mixture formed after the liquid ammonia is gasified serves as fuel and is ignited by an electric arc generated by the electrode pair, and then flames are formed. According to the arc torch combustion-supporting device, the energy utilization efficiency of the arc torch power source can be improved from 90% to 95% or above, and the energy utilization efficiency of the arc torch is improved from 70% to 90% or above.

Description

Technical Field

[0001] The invention relates to the field of combustion, and in particular to an arc torch combustion-supporting device and an ammonia burner. Background Art

[0002] In order to reduce carbon emissions from fossil energy, it is necessary to vigorously develop green new energy, including photovoltaics, wind power, etc. Due to the strong random volatility of wind and solar energy, the low utilization rate of new energy, resulting in waste of resources, so energy storage technology is needed to smooth the peak and fill the valley. Hydrogen energy, as a kind of energy storage technology, has the advantages of being green, efficient, carbon-free, and having a long storage time. It is an important part of the future energy system and will help accelerate the green and low-carbon transformation of high-energy-consuming and high-carbon emission industries. However, the large-scale application of hydrogen energy urgently needs to break through low-cost and high-efficiency fuel cell technology and low-cost and safe hydrogen storage and transportation technology. Among them, the poor safety and high cost of hydrogen storage and transportation have become the main difficulties in the development of hydrogen energy.

[0003] As a hydrogen carrier, ammonia has the characteristics of high energy density, low storage and transportation cost, and high safety, and is expected to break through the bottleneck of hydrogen energy development. However, in the application process of ammonia fuel, there are problems such as low flame propagation speed, difficult ignition, poor flame stability, NO x Problems such as high emissions need to be addressed urgently.

[0004] Patent "A Sliding Arc Plasma Flame Head in the Combustion Chamber of an Aircraft Engine", Chinese patent application with application number CN202111216787.1, its fuel nozzle is located in the cathode sleeve, and a sliding arc discharge is generated at the outlet of the swirler, which improves the quality of the outlet temperature field and increases the service life of the aircraft engine turbine; Patent "A Three-Dimensional Rotating Sliding Arc Plasma Actuator Combining Single and Double Paths", Chinese patent application with application number CN202110298162.8, the inner and outer groups of swirlers correspond to a group of electrodes respectively, and two sliding arcs can be generated at the same time, which broadens the ignition boundary of the combustion chamber of the aircraft engine and improves the combustion efficiency. The above-mentioned sliding arc plasma actuators are all used for the ignition of kerosene in aircraft engines. Due to the low discharge power and heat release power, they cannot meet the stable combustion of ammonia at high flow rates, and are prone to ammonia escape caused by incomplete combustion, especially when the fuel introduced into the high-power burner is liquid ammonia, which puts higher requirements on the ignition performance of the igniter.

[0005] The arc torch has greater power and better ignition performance than the sliding arc igniter, and is expected to achieve stable combustion of ammonia at high flow rates. However, the energy thermal efficiency of the arc torch is currently low and its application occasions are limited. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an arc torch combustion-supporting device, which can improve the energy utilization efficiency of the arc torch power supply and the energy utilization efficiency of the arc torch itself. The present invention also provides an ammonia burner including the above arc torch combustion-supporting device.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An arc torch combustion-supporting device, which uses liquid ammonia as a cooling medium, and comprises at least one pair of electrodes; an electrode cooling module is provided on at least one of the electrodes of the electrode pair, and the electrode cooling module is a hollow layer provided on the electrode for the liquid ammonia to pass through, one end of the hollow layer is a liquid ammonia inlet, and the other end of the hollow layer is an ammonia gas or gas-liquid mixture outlet;

[0009] Ammonia gas or a gas-liquid mixture formed by gasification of liquid ammonia is used as fuel and ignited by the electric arc generated by the electrode pair to form a flame.

[0010] The arc torch combustion-supporting device further comprises a solenoid connected to a power source and a solenoid cooling module, wherein the solenoids are respectively mounted on the electrode pairs, and the solenoid cooling module is a cooling channel arranged at the center of the solenoid for the liquid ammonia to pass through.

[0011] The solenoid comprises a solenoid insulating layer, a solenoid inlay layer and a solenoid thin-wall layer in sequence from the outside to the inside, and the inner wall of the solenoid thin-wall layer forms the cooling channel.

[0012] Wherein, the arc torch combustion-supporting device further comprises a power module, the power module comprises a circuit module and a power cooling module, the power cooling module is in contact with the circuit module, and the power cooling module uses liquid ammonia as a cooling medium.

[0013] Wherein, the electrode comprises a thin-walled layer and an inlaid layer, the thin-walled layer is fixedly embedded on the outside of the inlaid layer, and the hollow layer is arranged in the thin-walled layer.

[0014] The interior of the electrode pair is a cavity structure, a first air inlet connected to the cavity structure is arranged on one of the electrodes of the electrode pair, and a first cyclone is arranged near the first air inlet.

[0015] Wherein, a ventilation channel is arranged between the two electrodes of the electrode pair, a second air inlet is arranged on the ventilation channel, and a second cyclone is arranged near the second air inlet.

[0016] Wherein, an anode coating is arranged at the anode end of the electrode pair.

[0017] An ammonia burner comprises the aforementioned arc torch combustion-supporting device, wherein the arc torch combustion-supporting device is located at the center of the ammonia burner.

[0018] In which, the ammonia burner also includes a sleeve arranged on the outside of the electrode pair, and a fuel channel is formed between the sleeve and the electrode pair. The fuel enters from the inlet end of the fuel channel and is ejected from the outlet end of the fuel channel, forming a main combustion stage flame under the action of the flame formed by the arc torch combustion-supporting device.

[0019] There are multiple sleeves, and fuel channels are formed between adjacent sleeves.

[0020] Wherein, outlet ends of the electrode cooling module, the solenoid cooling module and the circuit cooling module are all in communication with the fuel channel.

[0021] The beneficial effects of the present invention are:

[0022] (1) The present invention utilizes the heat absorption of liquid ammonia vaporization to reduce the surface temperature of the anode and cathode, and utilizes the heat absorption of liquid ammonia vaporization to cool the cathode solenoid, the anode solenoid, and the arc torch power supply, thereby realizing full liquid ammonia cooling during the operation of the arc torch; liquid ammonia absorbs the heat of the electrode, the solenoid, and the power supply, thereby increasing the total enthalpy of ammonia, avoiding the reduction of the thermal efficiency of the arc torch due to deionized water cooling, thereby increasing the thermal efficiency of the arc torch, and the vaporized ammonia has better reaction activity, and the flame generated is more stable.

[0023] (2) The present invention causes the arcs generated by the anode and cathode to rotate under the action of swirling gas and magnetic field, thereby improving the temperature uniformity of the cathode and anode.

[0024] (3) The present invention can not only improve the energy utilization efficiency of the arc torch power supply from 90% to over 95%, but also improve the energy utilization efficiency of the arc torch itself from 70% to over 90%. At the same time, it can greatly reduce the electrode ablation rate, achieve arc discharge of hundreds of kW, and greatly improve the self-stabilizing combustion capability of the ammonia burner, so that it has cold start and rapid peak regulation capabilities, thereby providing a new technical direction for the cold start of coal-fired and gas-fired boilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the arc torch combustion-supporting device of the present invention;

[0026] Figure 2 is an overall schematic diagram of an ammonia burner of the present invention;

[0027] Figure 3 is a schematic diagram of the cross-sectional structure of the cathode solenoid of the present invention;

[0028] Figure 4is a schematic diagram of the cross-sectional structure of the anode solenoid of the present invention; Figure 5 It is a comparison diagram of energy utilization efficiency when the arc torch combustion-supporting device of the present invention is used.

[0029] Figure numerals: 100-cathode; 110-cathode thin-walled layer; 120-cathode inlay layer; 130-cathode hollow layer; 140-first liquid ammonia inlet; 150-first ammonia injection port; 160-first air inlet; 170-ventilation channel; 200-anode; 210-anode thin-walled layer; 220-anode inlay layer; 230-anode hollow layer; 240-second liquid ammonia inlet; 250-second ammonia injection port; 260-third ammonia injection port; 270-anode coating; 300-cathode solenoid; 301-cathode solenoid inlet; 302-cathode solenoid outlet; 310-cathode solenoid insulation layer; 320-cathode solenoid inlay layer; 330-cathode solenoid thin-walled layer; 340-cathode cooling channel; 400-anode solenoid; 401-anode solenoid inlet; 402-anode solenoid outlet; 410-anode solenoid insulation layer; 420-anode solenoid mosaic layer; 430-anode solenoid thin wall layer; 440-anode cooling channel; 501-first cyclone; 502-second cyclone; 503-third cyclone; 504-fourth cyclone; 505-fifth cyclone; 600-arc torch power supply; 610-circuit module; 620-liquid ammonia cooling module; 621-power supply cooling inlet; 622-power supply cooling outlet; 701-first fuel channel; 702-second fuel channel; 703-third fuel channel; 704-first pipeline, 705-second pipeline; 710-first sleeve; 720-second sleeve; 730-third sleeve; 001-arc; 002-pre-combustion stage flame; 003-main combustion stage flame. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0031] According to one embodiment of the present invention, Figure 1 As shown, an arc torch combustion-supporting device adopts liquid ammonia as a cooling medium. The arc torch combustion-supporting device comprises at least one pair of electrodes, wherein the electrode pair is an anode and a cathode arranged opposite to each other. The embodiment of the present invention only adopts one pair of electrodes for illustration, and multiple pairs of electrodes may be provided, and the multiple pairs of electrodes may be arranged symmetrically in a ring.

[0032] In this embodiment, an electrode cooling module is provided on at least one electrode of the electrode pair. Of course, it is better to provide corresponding electrode cooling modules on all electrodes.

[0033] See also Figure 1 The electrode pair includes a cathode 100 and an anode 200. The cathode 100 includes a cathode thin-walled layer 110 and a cathode inlaid layer 120. The cathode thin-walled layer 110 and the cathode inlaid layer 120 are bonded together. The cathode thin-walled layer 110 is made of a material resistant to ammonia corrosion. The cathode inlaid layer 120 is made of a material with good electrical conductivity and thermal conductivity. A cathode hollow layer 130 is provided in the cathode thin-walled layer 110. The cathode hollow layer is the cathode cooling module. The anode 200 includes an anode thin-walled layer 210 and an anode inlaid layer 220. The anode thin-walled layer 210 and the anode inlaid layer 220 are bonded together. The anode thin-walled layer 210 is made of a material resistant to ammonia corrosion. The anode inlaid layer 220 is made of a material with good electrical conductivity and thermal conductivity. A cathode hollow layer 230 is provided in the anode thin-walled layer 210. The anode hollow layer 230 is the anode cooling module. Therefore, the electrode cooling module in this embodiment includes an anode cooling module and a cathode cooling module.

[0034] like Figure 1 Described, one end (inlet end) of the cathode hollow layer, namely the first liquid ammonia inlet 140, is the liquid ammonia inlet, and the outlet end of the cathode hollow layer, namely the first ammonia injection port 150, is the ammonia gas or gas-liquid mixture outlet; the inlet end of the anode hollow layer, namely the second liquid ammonia inlet 240, is the liquid ammonia inlet, and the outlet end of the anode hollow layer, namely the second ammonia injection port 250, is the ammonia gas or gas-liquid mixture outlet.

[0035] Furthermore, a third ammonia injection port 260 may be provided on the anode hollow layer, and the third ammonia injection port 260 is located near the second ammonia injection port 250. Providing the third ammonia injection port can promote ammonia atomization and form a uniform ammonia-air mixture. More preferably, the distance between the third ammonia injection port 260 and the second ammonia injection port 250 is not greater than 40 mm.

[0036] This embodiment uses liquid ammonia as a cooling medium to cool the cathode 100 and the anode 200. Liquid ammonia enters from the first liquid ammonia inlet 140, absorbs heat and vaporizes, and then sprays out from the first ammonia injection port 150 to achieve cooling of the cathode 100; liquid ammonia enters from the second liquid ammonia inlet 240, absorbs heat and vaporizes, and then sprays out from the second ammonia injection port 250 and the third ammonia injection port 260 to achieve cooling of the anode 200; the sprayed ammonia gas or gas-liquid mixture can enter the fuel channel as fuel. This embodiment uses liquid ammonia as a cooling medium and designs corresponding electrode cooling modules in the cathode and anode, which achieves cooling of the electrode and improves the energy utilization efficiency of the arc torch power supply. It is estimated that the energy utilization efficiency is increased from 90% to more than 95%; the sprayed gaseous ammonia can be used as fuel to generate flames under the action of the arc. On the one hand, liquid ammonia can be used as a cooling medium, and the liquefied ammonia gas can be used as fuel, thereby increasing the energy utilization efficiency of the arc torch itself from 70% to more than 90%. At the same time, it can greatly reduce the electrode ablation rate, achieve arc discharge of hundreds of kW, and greatly improve the self-stabilizing combustion capability of the ammonia burner, enabling it to have cold start and rapid peak regulation capabilities, thereby providing a new technical direction for the cold start of coal-fired and gas-fired boilers.

[0037] Preferably, the arc torch combustion-supporting device further comprises a solenoid and a solenoid cooling module, wherein the solenoids are respectively mounted on the electrode pairs, and the solenoid cooling module is a cooling channel arranged at the center of the solenoid for the liquid ammonia to pass through. Specifically, the solenoid comprises a cathode solenoid 300 and an anode solenoid 400; the cathode solenoid 300 is spirally shaped, mounted on the cathode 100, connected to a power source, and forms a magnetic field around the cathode 100;

[0038] The anode solenoid 400 is spiral-shaped, is mounted on the anode 200 , and is connected to a power source to form a magnetic field around the anode 200 .

[0039] See also Figure 3The cathode solenoid 300 includes a cathode solenoid inlet 301, a cathode solenoid outlet 302, a cathode solenoid insulating layer 310, a cathode solenoid inlay layer 320 and a cathode solenoid thin-walled layer 330; the cathode solenoid insulating layer 310, the cathode solenoid inlay layer 320 and the cathode solenoid thin-walled layer 330 are sequentially attached together, the cathode solenoid insulating layer 310 is located at the outermost side, and the cathode solenoid thin-walled layer 330 is located at the innermost side; the center of the cathode solenoid 300, that is, the inner wall of the cathode solenoid thin-walled layer 330 forms a cathode cooling channel 340 for the liquid ammonia to pass through. One end of the cathode cooling channel 340 is the cathode solenoid inlet 301, and the other end of the cathode cooling channel 340 is the cathode solenoid outlet 302; the cathode solenoid inlet 301 and the cathode solenoid outlet 302 are respectively located at the two end surfaces of the cathode solenoid 300; liquid ammonia is introduced into the cathode solenoid inlet 301, and the liquid ammonia vaporizes and absorbs heat, thereby reducing the temperature of the cathode solenoid 300, and the formed ammonia gas or ammonia gas-liquid mixture is ejected from the cathode solenoid outlet 302;

[0040] See also Figure 4 The anode solenoid 400 includes an anode solenoid inlet 401, an anode solenoid outlet 402, an anode solenoid insulating layer 410, an anode solenoid inlay layer 420 and an anode solenoid thin-walled layer 430; the anode solenoid insulating layer 410, the anode solenoid inlay layer 420 and the anode solenoid thin-walled layer 430 are sequentially attached together, the anode solenoid insulating layer 410 is located at the outermost side, and the anode solenoid thin-walled layer 430 is located at the innermost side; the center of the anode solenoid 400, that is, the inner wall of the anode solenoid thin-walled layer 430 forms an anode cooling channel 440 for the liquid ammonia to pass through. One end of the anode cooling channel 440 is the anode solenoid inlet 401, and the other end of the anode cooling channel 440 is the anode solenoid outlet 402; the anode solenoid inlet 401 and the anode solenoid outlet 402 are respectively located at the two end surfaces of the anode solenoid 400; liquid ammonia is introduced into the anode solenoid inlet 401, and the liquid ammonia vaporizes and absorbs heat to reduce the temperature of the anode solenoid 400, and the formed ammonia gas or ammonia gas-liquid mixture is ejected from the anode solenoid outlet 402.

[0041] The solenoid cooling module in this embodiment includes a cathode cooling channel 340 and an anode cooling channel 440 .

[0042] like Figure 1 As shown, the interior of the electrode pair (cathode 100 and anode 200) is a cavity structure, that is, the cathode 100 and the anode 200 maintain a ventilation channel, and the air structure is the ventilation channel. A first air inlet 160 connected to the cavity structure is provided on the cathode 100, and a first cyclone 501 is provided near the first air inlet.

[0043] For further information, see Figure 1A ventilation channel 170 is provided between the two electrodes (cathode 100 and anode 200) of the electrode pair, a second air inlet is provided on the ventilation channel, and a second cyclone 502 is provided near the second air inlet.

[0044] Correspondingly, the arc torch combustion-supporting device of the present invention is also provided with a pipeline connected to the electrode cooling channel, the solenoid cooling channel and the ventilation channel for introducing fuel or liquid ammonia. Figure 1 The first pipeline 710 is connected to the ventilation channel 170; the second pipeline 720 is connected to the second liquid ammonia inlet 240.

[0045] The first air inlet 160 and the air passage 170 allow air to flow in, so as to form a swirling gas.

[0046] The present invention generates an arc 001 by cathode and anode discharge. The arc rotates circumferentially under the action of swirling gas and magnetic field, thereby improving the temperature uniformity of the cathode and anode. The high temperature generated by the arc ignites the ejected ammonia-air mixture to form a pre-combustion level flame 002.

[0047] For better, see Figure 1 An anode coating 270 is provided at the anode end of the electrode pair. The anode coating 270 partially covers the anode inlay layer 220 to prevent the anode inlay layer from being corroded by ammonia.

[0048] See also Figure 2 The arc torch combustion-supporting device of the present invention also includes an arc torch power supply 600; the arc torch power supply 600 includes a circuit module 610 and a liquid ammonia cooling module 620; the circuit module 610 and the liquid ammonia cooling module 620 are bonded together, and the contact surface ensures good thermal conductivity; the liquid ammonia cooling module 620 includes a power supply cooling inlet 621 and a power supply cooling outlet 622; liquid ammonia is introduced into the power supply cooling inlet 621, and the liquid ammonia absorbs heat after vaporization, thereby reducing the temperature of the circuit module 610, and the ammonia gas or ammonia gas-liquid mixture formed after vaporization flows out through the power supply cooling outlet 622 and enters the fuel channel through a pipeline.

[0049] See also Figure 2 , Figure 2 1 is an overall schematic diagram of an ammonia burner. The ammonia burner comprises an arc torch combustion-supporting device and a fuel channel, wherein the arc torch combustion-supporting device is located at the center of the ammonia burner.

[0050] The ammonia burner also includes a sleeve arranged on the outside of the electrode pair, and a fuel channel is formed between the sleeve and the electrode pair. Fuel enters from the inlet end of the fuel channel and is ejected from the outlet end of the fuel channel, forming a main combustion stage flame under the action of the flame formed by the arc torch combustion-supporting device.

[0051] Preferably, there are multiple sleeves, and fuel channels are formed between adjacent sleeves.

[0052] like Figure 2 As shown, the ammonia burner also includes a first sleeve 710, and a first fuel channel 701 is formed between the first sleeve 710 and the electrode pair. Ammonia gas or gas-liquid mixture sprayed from the first ammonia injection port 150, the third ammonia injection port 260, the cathode solenoid outlet 302, the anode solenoid outlet 402 and the power supply cooling outlet 622 all enter the fuel channel.

[0053] Better yet, see Figure 2 The ammonia burner is provided with a plurality of sleeves, and the ammonia burner also includes a second sleeve 720 and a third sleeve 730; these sleeves and electrode pairs are coaxially arranged, a fuel channel is formed between adjacent sleeves, and the gas channel is provided with an air inlet. Specifically, a second fuel channel 702 is formed between the first sleeve 710 and the second sleeve 720, and a third fuel channel 703 is formed between the second sleeve 720 and the third sleeve 730.

[0054] Furthermore, a swirler is provided in each fuel channel, such as the third swirler 503 provided in the first fuel channel 701, the fourth swirler 504 provided in the second fuel channel 702, and the fifth swirler 505 provided in the third fuel channel 703; the pre-combustion stage flame 002 is formed by mixing the high-temperature jet generated by the arc torch with ammonia.

[0055] The high temperature generated by the electric arc ignites the ammonia-air mixture ejected through the third swirler 503 to form a pre-combustion stage flame 002, which mixes with the ammonia and air entering through the second fuel channel 702 and the third fuel channel 703 to form a main combustion stage flame. The present invention realizes the ignition and stable combustion of the ammonia burner by introducing a high-power plasma torch.

[0056] Ammonia or an ammonia-air mixture is introduced into the first fuel channel 701, which is mixed with the ammonia or gas-liquid mixture ejected from the first ammonia injection port 150, the third ammonia injection port 260, the cathode solenoid outlet 302, the anode solenoid outlet 402, the power supply cooling outlet 622, etc., and then forms a swirl through the third swirler 503, and forms a pre-combustion level flame 002 through the arc 001 generated by the arc torch; ammonia or an ammonia gas-liquid mixture is introduced into the second fuel channel 702, and forms a swirl after passing through the fourth swirler 504; air is introduced into the third fuel channel 703, and forms a swirl after passing through the fifth swirler 505, which is mixed with the ammonia or the ammonia gas-liquid mixture introduced into the second fuel channel 702, and forms a main combustion level flame 003 under the action of the pre-combustion level flame 002.

[0057] Table 1 is the comparative data of energy utilization efficiency of water cooling and liquid ammonia cooling of the present invention under different working conditions. Figure 5This is a comparison chart of the energy utilization efficiency of the arc torch combustion-supporting device of the present invention when it is used. Figure 5 It can be seen that under the same operating conditions, the liquid ammonia cooling method of the present invention can not only increase the energy utilization efficiency of the arc torch power supply from 90% to more than 95%, but also increase the energy utilization efficiency of the arc torch itself from 70% to more than 90%.

[0058] Table 1

[0059] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0060] The parts not described in detail in the present description belong to the known technology in the art. The above embodiments are provided only for the purpose of describing the present invention, and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims. Various equivalent substitutions and modifications made without departing from the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. An arc torch combustion-supporting device, characterized in that: Liquid ammonia is used as a cooling medium, and the arc torch combustion-supporting device comprises at least one pair of electrodes; an electrode cooling module is provided on at least one of the electrodes of the electrode pair, and the electrode cooling module is a hollow layer provided on the electrode for the liquid ammonia to pass through, one end of the hollow layer is a liquid ammonia inlet, and the other end of the hollow layer is an ammonia gas or gas-liquid mixture outlet; Ammonia gas or a gas-liquid mixture formed by gasification of liquid ammonia is used as fuel and ignited by the electric arc generated by the electrode pair to form a flame.

2. The arc torch combustion-supporting device according to claim 1, characterized in that: The arc torch combustion-supporting device also includes a solenoid connected to a power source and a solenoid cooling module. The solenoids are respectively mounted on the electrode pairs. The solenoid cooling module is a cooling channel arranged at the center of the solenoid for the liquid ammonia to pass through.

3. The arc torch combustion-supporting device according to claim 2, characterized in that: The solenoid comprises a solenoid insulating layer, a solenoid inlay layer and a solenoid thin-wall layer in sequence from the outside to the inside, and the inner wall of the solenoid thin-wall layer forms the cooling channel.

4. The arc torch combustion-supporting device according to claim 1, characterized in that: The arc torch combustion-supporting device further comprises a power module, which comprises a circuit module and a power cooling module. The power cooling module is in contact with the circuit module, and the power cooling module uses liquid ammonia as a cooling medium.

5. The arc torch combustion-supporting device according to claim 1, characterized in that: The electrode comprises a thin-wall layer and an inlay layer, the thin-wall layer is fixedly embedded on the outside of the inlay layer, and the hollow layer is arranged in the thin-wall layer.

6. The arc torch combustion-supporting device according to claim 1, characterized in that: The interior of the electrode pair is a cavity structure, a first air inlet communicating with the cavity structure is arranged on one of the electrodes of the electrode pair, and a first cyclone is arranged near the first air inlet.

7. The arc torch combustion-supporting device according to claim 1, characterized in that: A ventilation channel is arranged between two electrodes of the electrode pair, a second air inlet is arranged on the ventilation channel, and a second cyclone is arranged near the second air inlet.

8. The arc torch combustion-supporting device according to any one of claims 1 to 7, characterized in that: An anode coating is provided at the anode end of the electrode pair.

9. An ammonia burner, characterized in that: It comprises the arc torch combustion-supporting device according to any one of claims 1 to 8, wherein the arc torch combustion-supporting device is located at the center of the ammonia burner.

10. The ammonia burner according to claim 9, characterized in that: The ammonia burner also includes a sleeve arranged on the outside of the electrode pair, and a fuel channel is formed between the sleeve and the electrode pair. Fuel enters from the inlet end of the fuel channel and is ejected from the outlet end of the fuel channel, forming a main combustion stage flame under the action of the flame formed by the arc torch combustion-supporting device.

11. The ammonia burner according to claim 10, characterized in that: There are multiple sleeves, and fuel channels are formed between adjacent sleeves.

12. The ammonia burner according to claim 10, characterized in that The outlet ends of the electrode cooling module, the solenoid cooling module and the circuit cooling module are in communication with the fuel channel.

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