Coal powder compound flame burner

Abstract

The utility model provides a kind of coal powder composite flame burner, it is related to cement production field.The burner includes: metal elbow pipe;Warm kernel fusion excitation component, including metal shell, metal electrode, insulating connecting piece and electrode head;The metal shell part is partially provided with opening in metal elbow pipe;Metal electrode is arranged in the inside of metal shell, is connected with metal shell by insulating connecting piece;Metal shell is communicated with delivery pipe, and the inside of metal electrode is equipped with delivery channel, and the one end of delivery channel is formed air outlet through the outside wall of the first end of metal electrode, electrode head is arranged at air outlet, electrode head is equipped with flow guide through-hole, flow guide through-hole is communicated delivery channel;Delivery channel is communicated with gas supply valve group.This application can significantly improve the combustion stability of starting stage, low load condition or kiln condition fluctuation by active construction of plasma field, while fully utilizing nuclear energy gain to realize energy saving and consumption reduction, effectively avoid the problem of insufficient combustion and flameout.

Description

Technical Field

[0001] This utility model relates to the field of cement production technology, and more specifically, to a pulverized coal composite flame burner for a cement production decomposition furnace. Background Technology

[0002] In cement production, the formation of cement clinker involves six stages: at 100-150℃, the raw meal entering the kiln evaporates free water; at 450℃, kaolinite in the clay dehydrates and releases its crystal water; from 600℃, magnesium carbonate begins to decompose (reaching its maximum rate at 750℃), and from 800℃, calcium carbonate begins to decompose (reaching its maximum rate at 900℃); from 800-1300℃, solid-phase reactions occur sequentially, forming CA, CF, C2S, C3A, and C4AF; from 1300-1450℃ and when the temperature drops to 1300℃, C2S reacts with the remaining CaO to form the crucial C3S; below 1300℃, the cooling process begins, requiring rapid cooling to prevent C2S from transforming into non-hydrated γ-C2S. In production, the specific surface area of ​​raw materials is increased by grinding raw materials to enhance the efficiency of high-temperature reaction, and the specific surface area of ​​clinker is increased by grinding clinker to accelerate the hydration reaction. The core energy-consuming equipment in the whole process is the decomposition furnace (coal powder glow flame combustion) and the rotary kiln (coal powder open flame combustion). The coal ratio between the two is 60:40, and the heat is provided by the combustion of high-calorific-value anthracite coal powder.

[0003] In traditional processes, the decomposition furnace is connected to the preheater and the rotary kiln. The decomposition furnace mainly relies on the high-temperature flue gas (usually 800-1000℃) discharged from the kiln tail of the rotary kiln and the heat brought in by the preheated raw materials to maintain a high-temperature environment of 800-900℃ in the furnace to achieve spontaneous combustion of pulverized coal—a temperature far higher than the ignition point of pulverized coal of 400-500℃.

[0004] However, this method of maintaining combustion by relying on the temperature of the flue gas at the kiln tail and the heat brought in by the raw materials is easily affected by fluctuations: poor combustion of pulverized coal or even flameout is very likely to occur during startup, low load or fluctuations in kiln conditions. Utility Model Content

[0005] The purpose of this invention is to provide a pulverized coal composite flaming burner, which aims to solve the technical problems in the background art.

[0006] The embodiments of this utility model are implemented as follows: This application provides a pulverized coal composite glow flame burner, comprising: a metal bend; a thermonuclear fusion excitation assembly, including a metal shell, a metal electrode, an insulating connector, and an electrode head; the metal shell has a first end located inside the metal bend and a second end located outside the metal bend, and the portion of the metal shell located inside the metal bend has an opening; the metal electrode is disposed inside the metal shell and is insulatedly connected to the metal shell through the insulating connector, the metal electrode has a first end near the opening and a second end for electrically connecting to a power source; the metal shell is provided with a conveying pipe communicating with its inner cavity, the metal electrode has a conveying channel inside, and one end of the conveying channel penetrates the outer wall of the first end of the metal electrode to form an air outlet, the electrode head is disposed at the air outlet, the electrode head has a guide hole communicating with the conveying channel; the end of the conveying channel away from the electrode head is connected to a gas supply valve assembly.

[0007] Furthermore, based on the aforementioned scheme, the metal bend includes a first straight pipe section connected to the decomposition furnace, and a second straight pipe section for inputting pulverized coal and air. The aforementioned metal outer shell includes: a first annular steel cylinder, one end of which extends into the first straight tube and is arranged along the axial direction of the first straight tube, and the other end extends through to the outside of the aforementioned metal bend; a second annular steel cylinder, which is connected to the port of the first annular steel cylinder outside the aforementioned metal bend; and a protective cover, which is sealed to the port of the second annular steel cylinder away from the first annular steel cylinder; the port of the first annular steel cylinder away from the second annular steel cylinder is the aforementioned opening, and the aforementioned metal electrode is located inside the cavity formed by the first annular steel cylinder, the second annular steel cylinder, and the aforementioned protective cover.

[0008] Furthermore, based on the aforementioned scheme, the outer wall of the aforementioned metal bend is provided with a straight pipe that communicates with its inner cavity, and the aforementioned straight pipe is used for the insertion of the aforementioned first annular steel cylinder. The second annular steel cylinder and the straight pipe are detachably connected via a flange structure.

[0009] Furthermore, based on the aforementioned scheme, a ceramic protective tube is fitted over the outside of the first annular steel cylinder.

[0010] Furthermore, based on the aforementioned scheme, the insulating connector includes: an insulating base disposed at the end of the metal electrode away from the electrode head; and an insulating protective sleeve sleeved around the outer periphery of the metal electrode between the insulating base and the electrode head.

[0011] Furthermore, based on the aforementioned scheme, the insulating base is provided with an installation through hole for mounting the metal electrode, and a visible through hole is provided on the insulating base outside the installation through hole, with a transparent sealing member disposed in the visible through hole; wherein, the protective cover is provided with an observation window, and the observation window is disposed opposite to the transparent sealing member.

[0012] Furthermore, based on the aforementioned scheme, the metal electrode is rotatably fitted with swirling blades, and the swirling blades are located between the connection between the conveying pipe and the metal outer shell and the electrode head.

[0013] Furthermore, based on the aforementioned scheme, the inner wall of the first annular steel cylinder is provided with a stainless heat-resistant steel pipe section, and the electrode head is located inside the stainless heat-resistant steel pipe section.

[0014] Furthermore, based on the aforementioned scheme, the interior of the metal bend is provided with a ceramic inner lining tube.

[0015] Furthermore, based on the aforementioned scheme, the metal casing is equipped with a pressure detection head for detecting the air pressure inside the metal casing.

[0016] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: Breaking away from the traditional process's dependence on kiln tail flue gas temperature and raw material heat, this technology actively constructs a plasma field to ensure combustion conditions, significantly improving combustion stability during startup, low load, or kiln condition fluctuations, and effectively avoiding poor combustion and flameout problems. At the same time, the combined release of nuclear and chemical energy significantly improves energy utilization efficiency, achieving significant energy-saving and coal-saving effects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an isometric view of a pulverized coal composite flaming flame burner according to an embodiment of the present invention; Figure 2 This is an exploded view of a pulverized coal composite flaming flame burner according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a pulverized coal composite flaming flame burner according to an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of part A in the image; Figure 5for Figure 3 A magnified view of part B in the image; Figure 6 This is a schematic diagram of the structure of the protective cover according to an embodiment of the present utility model; Figure 7 Axonometric view of the insulating base in this embodiment of the utility model Figure 1 ; Figure 8 Axonometric view of the insulating base in this embodiment of the utility model Figure 2 ; Figure 9 This is an isometric view of the electrode head in an embodiment of this utility model.

[0019] Icons: 1-Metal bend, 2-Ceramic liner, 3-Straight pipe, 4-Metal outer shell, 401-First annular steel cylinder, 402-Second annular steel cylinder, 403-Protective cover, 5-Gas supply valve assembly, 6-Transport pipe, 7-Flange structure, 8-Electrode head, 9-Stainless steel heat-resistant pipe section, 10-Guide hole, 11-Metal electrode, 12-Transport channel, 13-Swirl vane, 14-Insulating protective sleeve, 15-Insulating seat, 16-Pressure detection head, 17-Observation window, 18-Visual through hole, 19-Transparent sealing component, 20-Ceramic protective pipe. Detailed Implementation

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0021] Please refer to Figures 1-9 This application provides a pulverized coal composite glow flame burner, comprising: a metal bend 1 (which may be made of steel); a thermonuclear fusion excitation assembly, including a metal shell 4, a metal electrode 11, an insulating connector, and an electrode head 8; the metal shell 4 has a first end located inside the metal bend 1 and a second end located outside the metal bend 1, and the portion of the metal shell 4 located inside the metal bend 1 has an opening; the metal electrode 11 is disposed inside the metal shell 4 and is insulatedly connected to the metal shell 4 through the insulating connector, the metal electrode 11 has a first end near the opening and a second end for electrically connecting to a power source; the metal shell 4 is provided with a conveying pipe 6 communicating with its inner cavity, the metal electrode 11 is provided with a conveying channel 12 inside, and one end of the conveying channel 12 penetrates the outer side wall of the first end of the metal electrode 11 to form an air outlet, the electrode head 8 is disposed at the air outlet, the electrode head 8 is provided with a guide hole 10, the guide hole 10 communicating with the conveying channel 12; the end of the conveying channel 12 away from the electrode head 8 is connected to a gas supply valve assembly 5.

[0022] The working principle of this pulverized coal thermonuclear fusion composite flame burner is as follows: the metal electrode 11 is connected to a thermonuclear fusion excitation power supply with a steep drop characteristic of 1kHz-50kHz and 5kV-50kV. The two ends of the metal bend 1 are connected to the decomposition furnace and the air-pulverized coal source, respectively. The gas supply valve group 5 introduces organic gases such as air, water vapor, hydrogen or ammonia, while the delivery pipe 6 supplies combustion air. The air in the delivery pipe 6 first causes the air-pulverized coal to burn in the decomposition furnace in a flame, releasing chemical energy. At the same time, the electrode head 8 and the metal shell 4 cooperate to form a gradually gradient divergent high-frequency alternating plasma field (from the electrode head 8 to the decomposition furnace). This field excites the hydrogen isotopes deuterium and tritium in the pulverized coal, air and water vapor medium to undergo a fusion reaction and release nuclear energy, ultimately realizing composite combustion with the synergistic release of nuclear energy and chemical energy. Its significant advantages are: breaking through the dependence of traditional processes on the temperature of kiln tail flue gas and the heat brought in by raw materials, and by actively constructing a plasma field to ensure combustion conditions, it greatly improves the combustion stability during start-up, low load or kiln condition fluctuations, and effectively avoids problems of poor combustion and flameout; at the same time, the combined release of nuclear energy and chemical energy significantly improves energy utilization efficiency, and can achieve significant energy-saving and coal-saving effects.

[0023] Optionally, the concentration of pulverized coal introduced into the metal bend 1 is 0.8-8 kg (pulverized coal) / kg (air) (i.e., 0.8 kg-8 kg of pulverized coal is suspended and transported per kg of air), with a pulverized coal flow rate of 2-10 tons / hour, and the air flow rate introduced into the conveying pipe 6 is 10-60 cubic meters / hour. This ensures that the pulverized coal in the decomposition furnace nozzle connected to the metal bend 1 can be excited in the plasma field to release nuclear energy through deuterium-tritium fusion. Subsequently, the pulverized coal enters the decomposition furnace for glow flame combustion.

[0024] One end of the guide hole 10 is connected to the aforementioned conveying channel 12, and the other end penetrates the side of the electrode head 8 away from the metal electrode 11. There are multiple guide holes 10, evenly spaced along the circumferential direction of the electrode head 8. Multiple discharge sections are formed by localized protrusions on the outer ring surface of the electrode head 8, and these discharge sections are evenly spaced around the circumferential direction of the electrode head 8. The evenly spaced guide holes 10 along the circumferential direction on the side of the electrode head 8 away from the metal electrode 11 allow the medium gas (air, water vapor, etc.) in the conveying channel 12 to be uniformly ejected circumferentially, fully mixing with the flowing coal powder. Simultaneously, the evenly distributed discharge sections on the outer ring surface of the electrode head 8 enhance the local electric field strength using the tip discharge effect of the protruding structure, making the mixed medium easier to ionize. This forms a uniform and wide-coverage high-frequency alternating plasma field between the electrode head 8 and the ground electrode, thereby efficiently stimulating the synergistic reaction of hydrogen isotope thermal fusion and coal powder combustion. Its advantages are as follows: the uniform arrangement of the guide holes 10 ensures the uniformity of the mixing of the medium gas and the coal powder, avoiding local reaction imbalance; the circumferential uniform distribution of the discharge section enhances the consistency of the electric field strength, improves the stability and coverage efficiency of the plasma field, promotes the full release of nuclear and chemical energy, and optimizes the energy distribution of the electrode head 8, extending its service life and further ensuring the efficient and stable operation of the combustion system.

[0025] It is worth noting that the chemical-nuclear energy hybrid combustion technology, as a highly innovative energy utilization technology, cleverly integrates the process of releasing chemical energy through the combustion of traditional chemical fuels with the release of nuclear energy through nuclear reactions, aiming to create a more efficient, cleaner, and more stable energy supply model. In this technological system, a high-frequency, high-voltage electric field provides the energy for igniting the initial chemical fuel combustion and creates a specific reaction environment, allowing the high-energy particles in the fuel to fuse and release nuclear energy simultaneously with chemical energy. At the same time, the energy released by nuclear energy can further improve the combustion efficiency of chemical fuels, thereby effectively reducing the consumption of chemical fuels and the emission of pollutants. Through this combined application of chemical and nuclear energy, the inherent limitations of single-energy utilization have been successfully overcome. The chemical-nuclear energy hybrid combustion technology is common knowledge and has been published in the book "Controlled-Temperature Nuclear Fusion Photonuclear Reaction Hybrid Combustion Theory and Practice" (ISBN 978-7-5646-5429-0), co-authored by Ding Enzhen, Liu Angang, and others, and published by China University of Mining and Technology Press in June 2022.

[0026] In a preferred embodiment, the metal bend 1 includes a first straight pipe section connected to the decomposition furnace, and a second straight pipe section for inputting pulverized coal and air. The aforementioned metal outer shell 4 includes: a first annular steel cylinder 401, one end of which extends into the first straight tube and is arranged along the axial direction of the first straight tube, and the other end extends through to the outside of the metal bend 1; a second annular steel cylinder 402, which is connected to the port portion of the first annular steel cylinder 401 outside the metal bend 1; and a protective cover 403, which is sealed to the port portion of the second annular steel cylinder 402 away from the first annular steel cylinder 401; the port portion of the first annular steel cylinder 401 away from the second annular steel cylinder 402 is the aforementioned opening, and the metal electrode 11 is located inside the cavity formed by the first annular steel cylinder 401, the second annular steel cylinder 402, and the protective cover 403.

[0027] In the above embodiment, the second straight section of the metal bend 1 is used to input air-coal powder, and the first straight section is connected to the decomposition furnace. The air-coal powder flows towards the decomposition furnace along the axis of the first straight section. The metal electrode 11 is connected to a thermonuclear fusion excitation power supply with a steep drop characteristic of 1kHz-50kHz and 5kV-50kV. It forms a high-frequency high-voltage electric field with the first annular steel cylinder 401 (which serves as a grounding electrode) extending into the first straight section. The opening of the first annular steel cylinder 401 faces the air-coal powder flow path. Together with the sealed cavity formed by the second annular steel cylinder 402 and the protective cover 403, the medium gas (air, water vapor, etc.) is ionized in the electric field, forming a divergent high-frequency alternating plasma field extending along the axis of the first straight section. When the air-coal powder flows through this field, it is attracted by static electricity. The hydrogen isotopes in the powder undergo thermonuclear fusion under the excitation of the electric field, releasing nuclear energy. At the same time, the coal powder releases chemical energy in the glowing flame combustion, achieving composite combustion. Its advantages are as follows: the first annular steel cylinder 401 is set along the axis of the first straight pipe to ensure precise matching between the plasma field and the flow direction of air and coal powder, thereby improving energy conversion efficiency; the four-segment design of the metal shell facilitates installation and maintenance, and the protective cover 403 can effectively protect the internal components from coal powder wear; the opening directly acts on the air and coal powder entering the decomposition furnace, enhancing the synergistic release effect of nuclear energy and chemical energy, further enhancing combustion stability, and helping to achieve the goal of increasing energy and saving coal.

[0028] In a preferred embodiment, the outer wall of the metal bend 1 is provided with a straight pipe 3 that communicates with its inner cavity, and the straight pipe 3 is used for the insertion of the first annular steel cylinder 401. The second annular steel cylinder 402 and the straight pipe 3 are detachably connected via flange structure 7.

[0029] In the above embodiment, the straight pipe 3 on the outer wall of the metal bend 1 connects to its inner cavity, allowing the first annular steel cylinder 401 to be inserted, ensuring that the opening of the first annular steel cylinder 401 is precisely positioned within the air-coal powder flow path of the inner cavity of the metal bend 1. The second annular steel cylinder 402 is detachably connected to the straight pipe 3 via a flange structure 7, which both fixes the position of the first annular steel cylinder 401 and forms a sealed space, ensuring the stable generation of a high-frequency, high-voltage electric field between the metal electrode 11 and the first annular steel cylinder 401. Its advantages are: the detachable flange connection facilitates the installation, maintenance, and replacement of components such as the first annular steel cylinder 401 and the metal electrode 11, adapting to the on-site modification needs of the decomposition furnace; the straight pipe 3 provides stable support for the first annular steel cylinder 401, ensuring precise interaction between the opening and the air-coal powder flow, enhancing the contact efficiency between the plasma field and the air-coal powder, improving the synergistic release effect of nuclear and chemical energy, further ensuring combustion stability, and contributing to energy conservation and coal saving.

[0030] In a preferred embodiment, the first annular steel cylinder 401 is fitted with a ceramic protective tube.

[0031] In the above embodiments, the ceramic material has excellent wear resistance and high temperature resistance, which can effectively resist the erosion and wear during the conveying of coal powder and the high temperature environment in the decomposition furnace, protect the first annular steel cylinder 401 from damage and extend its service life; at the same time, the insulating properties of ceramics can reduce the energy loss of the electric field, ensure the stable formation of the high-frequency high-voltage electric field between the first annular steel cylinder 401 as the grounding electrode and the metal electrode 11, and ensure the continuous effectiveness of the plasma field.

[0032] In a preferred embodiment, the insulating connector includes: an insulating base 15 disposed at the end of the metal electrode 11 away from the electrode head 8; and an insulating protective sleeve 14 sleeved around the outer periphery of the metal electrode 11 between the insulating base 15 and the electrode head 8.

[0033] In the above embodiment, the insulating base 15 is disposed at the end of the metal electrode 11 furthest from the electrode head 8, and the insulating protective sleeve 14 is sleeved around the outer periphery of the metal electrode 11 between the insulating base 15 and the electrode head 8. Through the synergistic effect of the two, reliable insulation between the metal electrode 11 and the metal shell 4 is achieved, avoiding leakage or short circuit of high-frequency high-voltage current. Its advantages are: it fully covers the area where the metal electrode 11 may come into contact with the shell, ensuring stable insulation performance between the electrode and the shell, and providing a reliable guarantee for the generation of high-frequency high-voltage electric field; at the same time, the insulating material can protect the metal electrode 11 from corrosion and wear by the medium gas and coal powder, improving the overall stability and service life of the equipment.

[0034] In a preferred embodiment, the insulating base 15 is provided with a mounting through hole for mounting the metal electrode 11. A visible through hole 18 is provided on the insulating base 15 outside the mounting through hole, and a transparent sealing member 19 is provided in the visible through hole 18. The protective cover 403 is provided with an observation window 17, and the observation window 17 is arranged opposite to the transparent sealing member 19.

[0035] In the above embodiment, the relative arrangement of the visible through-hole 18 (with a transparent sealing element 19 inside) on the insulating base 15 and the observation window 17 of the protective cover 403 forms a visual channel that allows direct observation of the interior without disassembling the equipment. This facilitates real-time monitoring of the state (such as morphology and stability) of the high-frequency alternating plasma field near the metal electrode 11 and electrode head 8, providing an intuitive basis for timely judgment of whether the combustion reaction is normal. At the same time, the transparent sealing element 19 ensures both clear observation and effective sealing of the through-hole, preventing leakage of internal medium gases (air, water vapor, etc.) and intrusion of external coal powder and dust, thus ensuring the sealing of the insulating base 15 and the cleanliness of the internal components, and maintaining stable insulation performance. In addition, this design simplifies the monitoring process of the core combustion area, reduces the number of shutdowns for inspection, improves the continuity of equipment operation and maintenance efficiency, and helps to optimize operating parameters through real-time observation, further ensuring the high efficiency and stability of composite combustion.

[0036] In a preferred embodiment, the metal electrode 11 is rotatably fitted with a swirling blade 13, and the swirling blade 13 is located between the connection between the conveying pipe 6 and the metal outer shell 4 and the electrode head 8.

[0037] In the above embodiment, the rotatable swirl blade 13 on the metal electrode 11 is located between the connection between the delivery pipe 6 (which supplies combustion air) and the metal shell 4 and the electrode head 8. When the combustion air supplied by the delivery pipe 6, the coal dust and other media (such as organic gases) in the metal shell 4 flow through this point, the swirl blade 13 rotates under the push of the media, causing the mixed media to form a strong swirling flow, which strengthens the mixing of each component and flows to the electrode head 8 and the plasma field region.

[0038] Its advantages are as follows: the swirling effect significantly improves the mixing uniformity of combustion air, pulverized coal, and medium gas, avoiding local concentration imbalances that affect combustion efficiency; at the same time, the swirling effect prolongs the residence time of the mixed medium in the plasma field, increases the contact area and interaction intensity with the high-frequency alternating plasma field, and more efficiently excites hydrogen isotope thermonuclear fusion and pulverized coal glowing flame combustion, enhancing the synergistic release of nuclear and chemical energy; in addition, the swirling effect can reduce the deposition and blockage of pulverized coal in the pipeline, and the rotatable characteristics of the blades can adapt to different medium flow rates, enhancing the adaptability to fluctuations in operating conditions, and further ensuring combustion stability and energy saving effects.

[0039] In a preferred embodiment, the inner wall of the first annular steel cylinder 401 is provided with a stainless heat-resistant steel pipe section 9, and the electrode head 8 is located inside the stainless heat-resistant steel pipe section 9.

[0040] In the above embodiments, the stainless heat-resistant steel pipe section 9 itself has excellent conductivity, high temperature resistance and corrosion resistance, and is suitable for the harsh environment of high temperature (800-900℃) and coal powder scouring and combustion corrosion in the decomposition furnace. It can stably undertake the grounding function for a long time and avoid the attenuation of conductivity caused by high temperature oxidation or wear of traditional grounding electrodes.

[0041] In a preferred embodiment, the metal bend 1 is provided with a ceramic inner liner 2 inside.

[0042] In the above embodiment, a ceramic inner liner 2 is provided inside the metal bend 1, which can resist the erosion of coal dust by wind due to the excellent wear resistance of ceramic, protect the metal bend 1 and extend its service life.

[0043] In a preferred embodiment, the metal casing 4 is provided with a pressure detection head 16 for detecting the air pressure inside the metal casing 4.

[0044] In the above embodiment, the metal casing 4 is equipped with a pressure detection head 16, which can monitor the internal air pressure in real time, making it easy to detect abnormalities in a timely manner to ensure the safe operation of the equipment and the stable delivery of the medium.

[0045] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0046] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A pulverized coal composite flaming flame burner, characterized in that, include: Metal bend (1); The thermonuclear fusion excitation assembly includes a metal shell (4), metal electrodes (11), insulating connectors, and electrode heads (8); The metal outer shell (4) has a first end located inside the metal bend (1) and a second end located outside the metal bend (1), and the portion of the metal outer shell (4) located inside the metal bend (1) has an opening; The metal electrode (11) is disposed inside the metal housing (4) and is insulatedly connected to the metal housing (4) through the insulating connector. The metal electrode (11) has a first end near the opening and a second end for electrically connecting to a power source. The metal outer shell (4) is provided with a conveying pipe (6) that communicates with its inner cavity. The metal electrode (11) is provided with a conveying channel (12) inside. One end of the conveying channel (12) passes through the outer side wall of the first end of the metal electrode (11) to form an air outlet. The electrode head (8) is located at the air outlet. The electrode head (8) is provided with a guide hole (10). The guide hole (10) communicates with the conveying channel (12). The end of the delivery channel (12) away from the electrode head (8) is connected to an air supply valve group (5).

2. The pulverized coal composite flaming burner according to claim 1, characterized in that, The metal bend (1) includes a first straight pipe section connected to the decomposition furnace, and a second straight pipe section for inputting air-coal powder; The metal casing (4) includes: The first annular steel cylinder (401) has one end extending into the first straight pipe section and arranged along the axial direction of the first straight pipe section, and the other end penetrating to the outside of the metal bend (1). The second annular steel cylinder (402) is connected to the port portion of the first annular steel cylinder (401) outside the metal bend (1); A protective cover (403) is sealed to the port of the second annular steel cylinder (402) away from the first annular steel cylinder (401); The opening is located at the port of the first annular steel cylinder (401) away from the second annular steel cylinder (402), and the metal electrode (11) is located inside the cavity formed by the first annular steel cylinder (401), the second annular steel cylinder (402) and the protective cover (403).

3. The pulverized coal composite flaming burner according to claim 2, characterized in that, The outer wall of the metal bend (1) is provided with a straight tube (3) that communicates with its inner cavity, and the straight tube (3) is used for the insertion of the first annular steel cylinder (401); The second annular steel cylinder (402) and the straight pipe (3) are detachably connected via a flange structure (7).

4. A pulverized coal composite flaming burner according to claim 2, characterized in that, The first annular steel cylinder (401) is fitted with a ceramic protective tube (20).

5. A pulverized coal composite flaming burner according to claim 2, characterized in that, The insulating connector includes: An insulating base (15) is disposed at one end of the metal electrode (11) away from the electrode head (8); An insulating protective sleeve (14) is fitted around the outer periphery of the metal electrode (11) between the insulating base (15) and the electrode head (8).

6. A pulverized coal composite flaming burner according to claim 5, characterized in that, The insulating base (15) has an installation through hole for mounting the metal electrode (11), and a visible through hole (18) is provided on the insulating base (15) outside the installation through hole. A transparent sealing member (19) is provided in the visible through hole (18). The protective cover (403) is provided with an observation window (17), and the observation window (17) is arranged opposite to the transparent sealing member (19).

7. A pulverized coal composite flaming burner according to claim 1, characterized in that, The metal electrode (11) is rotatably fitted with a swirling blade (13), and the swirling blade (13) is located between the connection between the delivery pipe (6) and the metal shell (4) and the electrode head (8).

8. A pulverized coal composite flaming burner according to claim 2, characterized in that, The inner wall of the first annular steel cylinder (401) is provided with a stainless heat-resistant steel pipe section (9), and the electrode head (8) is located inside the stainless heat-resistant steel pipe section (9).

9. A pulverized coal composite flaming burner according to claim 1, characterized in that, The metal bend (1) is provided with a ceramic inner lining tube (2).

10. A pulverized coal composite flaming burner according to claim 1, characterized in that, The metal casing (4) is equipped with a pressure detection head (16) for detecting the air pressure inside the metal casing (4).

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