A low-oil ignition pulverized coal combustion device for w-flame boiler ignition and a use method thereof

Abstract

The application discloses a little-oil ignition pulverized coal combustion device for W-flame boiler ignition and a use method, and belongs to the technical field of boilers, which comprises an air inlet pipe, an air inlet assembly is arranged in the air inlet pipe, a mixing pipe is connected to the bottom end of the air inlet pipe, a pulverized coal inlet pipe is connected to the interface of the mixing pipe, the end of the pulverized coal inlet pipe close to the mixing pipe is inverted V-shaped, a flow guide mixing disc is arranged in the mixing pipe, and through holes are uniformly arranged on the flow guide mixing disc, the top of the pulverized coal inlet pipe is inverted V-shaped, pulverized coal enters the mixing pipe and enters the mixing pipe in the same direction with air after entering the mixing pipe, and the feeding is ensured to be normal, the flow guide mixing disc is arranged in the mixing pipe, the through holes are uniformly arranged on the flow guide mixing disc, the pulverized coal and the air pass through the through holes, and the pulverized coal and the air are uniformly mixed, the oxygen supplementing interface is arranged at the secondary combustion chamber, the fuel is more fully combusted in the later stage of combustion, the heat energy is improved, and the environmental pollution is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of boilers, and particularly relates to a small-oil ignition pulverized coal combustion device for W-flame boiler ignition and a use method. BACKGROUND

[0002] A W-flame boiler is composed of a lower combustion chamber and an upper cooling chamber, the volume of the lower combustion chamber is expanded by about one time, and the fuel combustion process is basically carried out in the lower combustion chamber. The W-flame boiler can stably burn anthracite and lean coal with V daf = 6-20, and even can burn anthracite with V daf = 4, so the design coal type of the W-flame boiler is anthracite or lean coal with poor combustion characteristics, and the design ignition mode is large-oil-gun ignition. During the ignition process, a large oil gun is needed to heat the furnace, and when the furnace temperature can make the pulverized coal burn stably, the pulverized coal is put in, and the large oil gun is gradually withdrawn, so as to complete the boiler ignition. The fuel consumption is large during the ignition process.

[0003] The Chinese utility model patent with the publication number CN215951380U discloses a W-flame boiler ignition and combustion device, which comprises a primary air pipe, one end of the primary air pipe is provided with an inlet for introducing primary air and pulverized coal, a flow guide cover is arranged at the inlet of the primary air pipe, the other end of the primary air pipe is provided with an outlet, the outlets on both sides are respectively connected with the inlets of two thick pulverized coal pipes, and the center of the outlet is connected with the inlet of a thin pulverized coal pipe; the inside of the thick pulverized coal pipe is sequentially arranged with a thick-thin separation device, a primary combustion chamber and a secondary combustion chamber, the thick-thin separation device forms a pipe necking at the arrangement position of the pipe, the inlet of the primary combustion chamber is provided with an oil gun and a primary oxygen lance, and the inlet of the secondary combustion chamber is provided with a secondary oxygen lance; the inside of the primary air pipe is further provided with a flow guide vane between the flow guide cover and the outlet of the primary air pipe; the oil gun adopts an atomizing oil gun; the nozzle direction of the oil gun is parallel to the arrangement direction of the thick pulverized coal pipe; the nozzle directions of the primary oxygen lance and the secondary oxygen lance are perpendicular to the arrangement direction of the thick pulverized coal pipe; the cross section of the flow guide cover is in an inverted v shape; further comprising a connecting pipe, the two ends of the connecting pipe are respectively connected with the outlet of the primary air pipe and the inlet of the thick pulverized coal pipe; the outlet of the thick pulverized coal pipe is located above the outlet of the thin pulverized coal pipe or is arranged at the same height as the outlet of the thin pulverized coal pipe.

[0004] The above patent has the following deficiencies:

[0005] Firstly, the air outlet direction of the air duct is downward, and the generated air force directly meets the upward flowing pulverized coal. This reverse airflow not only hinders the flow of pulverized coal at the outlet of the pulverized coal pipe, but also may form local airflow turbulence, causing the stability of the pulverized coal flow to decrease. With the increase of air force, the phenomenon of pulverized coal being blown away and scattered may occur, thereby reducing the actual amount of pulverized coal entering the combustion chamber, affecting the stability of fuel supply and combustion efficiency.

[0006] Secondly, the movement trajectory and distribution state of the light pulverized coal entering the combustion chamber are seriously affected after being impacted by the air force blown downward by the air duct. The goal of efficient combustion through sufficient mixing of pulverized coal and air becomes difficult to achieve under the interference of the air force of the air duct. After being impacted by the air force, the light pulverized coal particles may become unevenly distributed, with high concentration of pulverized coal in some areas and thin pulverized coal in other areas. This uneven mixing state not only reduces the rate and efficiency of the combustion reaction, but also may cause local overheating, coking and other problems, further affecting the operation stability and safety of the combustion chamber.

[0007] In addition, the impact of the air force of the air duct may also damage the airflow organization in the combustion chamber, causing the change of the originally designed air power field. This change may cause the flame shape, temperature distribution and other parameters in the combustion chamber to deviate from the design values, thereby affecting the fuel combustion effect and heat energy release.

[0008] In order to solve these problems, the layout design of the combustion system needs to be optimized and adjusted to ensure the coordination of the airflow direction between the pulverized coal pipe and the air duct, so as to promote the sufficient mixing of pulverized coal and air and efficient combustion. SUMMARY

[0009] The purpose of the present application is to overcome the problem that air is difficult to mix uniformly with pulverized coal in the existing ignition pulverized coal combustion device, leading to insufficient fuel combustion. The present application provides a little-oil ignition pulverized coal combustion device for W-flame boiler ignition and a use method, which ensures the coordination of the airflow direction between the pulverized coal pipe and the air duct, and improves the combustion efficiency of the combustion device.

[0010] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0011] A little-oil ignition pulverized coal combustion device for W-flame boiler ignition, comprising an air inlet pipe, the bottom end of the air inlet pipe is connected to a mixing pipe, the mixing pipe is connected to a pulverized coal inlet pipe in parallel, the connection between the pulverized coal inlet pipe and the mixing pipe is in the shape of an inverted V, a flow guide mixing disc is arranged in the mixing pipe, and through holes are uniformly arranged on the flow guide mixing disc.

[0012] The flow guide mixing disc is provided with first through holes, and the first through holes are in the shape of a cylinder.

[0013] The second through hole is in the shape of a circular truncated cone.

[0014] The bottom of the flow guide mixing disc is welded with a mounting block, and the mounting block and the mixing pipe are fixed through bolts.

[0015] The air inlet assembly is arranged in the air inlet pipe, and the air inlet assembly comprises a support rod, the support rod is arranged on the U-shaped support connecting seat at both ends, a motor is fixed on the support rod, and a fan blade is fixedly arranged on the output shaft of the motor.

[0016] The bottom of the mixing pipe is fixedly connected with an oil mixing pipe, and the oil mixing pipe is provided with an oil inlet interface.

[0017] The oil mixing pipe is connected with the primary combustion chamber and the secondary combustion chamber, the secondary combustion chamber is connected with the first oxygen supplement interface and the second oxygen supplement interface, the first oxygen supplement interface and the second oxygen supplement interface are connected through a U-shaped pipe, and valves are arranged on the first oxygen supplement interface and the second oxygen supplement interface.

[0018] A method for using a little oil ignition pulverized coal combustion device for W flame boiler ignition, the pulverized coal enters from the pulverized coal inlet pipe, the air enters from the mixing pipe, the top of the pulverized coal inlet pipe is arranged in an inverted V shape, so that the pulverized coal and the air enter the mixing pipe in the same direction after entering the mixing pipe, a flow guide mixing disc is arranged in the mixing pipe, through holes are uniformly arranged on the flow guide mixing disc, and the pulverized coal and the air are mixed through the through holes.

[0019] The motor drives the fan blade to rotate to drum air into the mixing pipe, at the same time, the pulverized coal inlet pipe drums in the pulverized coal, the air and the pulverized coal are mixed fully through the through holes on the flow guide mixing disc, the air, the pulverized coal and the oil entering through the oil inlet interface are mixed and ignited to burn in the primary combustion chamber, and the remaining part burns in the secondary combustion chamber.

[0020] Oxygen is supplemented through the first oxygen supplement interface and the second oxygen supplement interface during the combustion process.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application provides a little oil ignition pulverized coal combustion device and a use method for W flame boiler ignition, comprising an air inlet pipe, the bottom end of the air inlet pipe is butt jointed with a mixing pipe, the bypass of the mixing pipe is connected with a pulverized coal inlet pipe, the connection between the pulverized coal inlet pipe and the mixing pipe is in an inverted V shape, a flow guide mixing disc is arranged in the mixing pipe, and through holes are uniformly arranged on the flow guide mixing disc, the top of the pulverized coal inlet pipe is arranged in an inverted V shape, so that the pulverized coal and the air enter the mixing pipe in the same direction after entering the mixing pipe, the air and the pulverized coal can enter the mixing pipe in the same direction, and the feeding is normal; the flow guide mixing disc is arranged in the mixing pipe, and the through holes are uniformly arranged on the flow guide mixing disc, so that the pulverized coal and the air pass through the through holes, the pulverized coal and the air are uniformly mixed, and the fuel combustion is more sufficient.

[0023] Further, the reasonably designed through holes can reduce the resistance during air flow, making the air flow more smoothly into the device or system, and improving the overall air circulation efficiency.

[0024] Further, by setting the oxygen supplement interface at the secondary combustion chamber, the fuel combustion in the later stage is more sufficient, not only optimizing the combustion process and improving the heat energy output, but also significantly reducing environmental pollution. This design innovation not only reflects a deep understanding of combustion science, but also shows an unrelenting pursuit in the field of energy utilization and environmental protection. With the continuous progress of technology and the popularization of application, it is believed that this design will play an important role in more fields and contribute to the construction of clean, efficient and sustainable energy system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 is a structural schematic diagram of the ignition pulverized coal combustion device of the present application;

[0027] Figure 2 is a structural schematic diagram of the ignition pulverized coal combustion device of the present application; Figure 1 is an enlarged view of A in the above figure;

[0028] Figure 3 is an enlarged view of B in the above figure; Figure 1 is an enlarged view of B in the above figure;

[0029] Figure 4 is a perspective view of the flow guide mixing disc of Example 1 in the present application;

[0030] Figure 5 is a perspective view of the flow guide mixing disc of Example 2 in the present application.

[0031] In the figure, the reference signs are as follows: 1, pulverized coal inlet pipe; 2, flow guide mixing disc; 21, mounting block; 22, first through hole; 23, second through hole; 3, air inlet pipe; 31, motor; 32, support rod; 33, U-shaped support connecting seat; 34, fan blade; 4, mixing pipe; 5, oil mixing pipe; 6, primary combustion chamber; 7, secondary combustion chamber; 8, oil inlet interface; 9, U-shaped pipe; 10, first oxygen supplement interface; 11, second oxygen supplement interface. DETAILED DESCRIPTION

[0032] In the following certain exemplary embodiments are simply described. As will be realized by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope thereof. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not as restrictive.

[0033] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In the present application, unless specifically and particularly defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be direct connection, or indirect connection through an intermediate medium; or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically and particularly defined otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "under" and "underneath" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In addition, the terms "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless specifically and particularly defined otherwise.

[0037] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0038] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Example 1:

[0041] like Figures 1-4 As shown, a low-oil ignition pulverized coal combustion device for igniting a "W" flame boiler includes an air inlet pipe 3, the bottom end of which is connected to a mixing pipe 4. The mixing pipe 4 is connected to a pulverized coal inlet pipe 1 via a bypass. The connection between the pulverized coal inlet pipe 1 and the mixing pipe 4 is an inverted V-shape. The outlet of the pulverized coal inlet pipe 1 near the mixing pipe 4 faces downward. A flow guiding mixing plate 2 is provided inside the mixing pipe 4, and through holes are evenly opened on the flow guiding mixing plate.

[0042] In this embodiment, pulverized coal enters through the pulverized coal inlet pipe 1, and air enters through the mixing pipe 4. The top of the pulverized coal inlet pipe 1 is set in an inverted V shape, so that the pulverized coal and air flow in the same direction after entering the mixing pipe 4, thus ensuring normal feeding. A flow guiding mixing plate 2 is set in the mixing pipe 4, and through holes are evenly opened on the flow guiding mixing plate 2, so that the pulverized coal and air can be mixed evenly through the through holes.

[0043] Example 2:

[0044] like Figures 1-4 As shown, based on Embodiment 1, as a further improvement of the present invention, preferably, the through hole opened on the flow mixing disk 2 is a first through hole 22, and the first through hole 22 is cylindrical.

[0045] The air inlet assembly is detachably installed in the air inlet pipe 3. When the air inlet assembly needs to be cleaned, replaced or repaired, it can be quickly taken out from the air inlet pipe due to the detachable design, without the need to disassemble the entire system, thereby greatly saving time and labor costs. The detachable air inlet assembly reduces the direct contact of the operator with the complex structure inside the equipment during maintenance and replacement, and reduces the safety risks caused by improper operation.

[0046] The bottom of the flow guide mixing disc 2 is welded with a mounting block 21, and the mounting block 21 and the mixing pipe 4 are fixedly connected through bolts.

[0047] The bottom of the mixing pipe 4 is fixedly connected with an oil mixing pipe 5, the oil mixing pipe 5 is provided with an oil inlet interface 8, and an igniter is arranged on the inner wall of the oil mixing pipe 5. The oil inlet interface 8 is connected with an oil pipe, the pulverized coal and air are mixed with the oil in the oil mixing pipe 5, and the oil mixing pipe 5 is connected with the primary combustion chamber 6 and the secondary combustion chamber 7.

[0048] In this embodiment, the motor 31 drives the fan blade 34 to rotate to blow air into the mixing pipe 4, at the same time, the pulverized coal is blown into the pipe 1, and the air and the pulverized coal are mixed fully through the first through hole 22 on the flow guide mixing disc 2; the air and the pulverized coal are mixed with the oil entering through the oil inlet interface 8 and ignited to burn in the primary combustion chamber 6; the remaining part burns in the secondary combustion chamber 7.

[0049] The air inlet assembly is detachably installed in the air inlet pipe 3. When the air inlet assembly needs to be cleaned, replaced or repaired, it can be quickly taken out from the air inlet pipe due to the detachable design, without the need to disassemble the entire system, thereby greatly saving time and labor costs. The detachable air inlet assembly reduces the direct contact of the operator with the complex structure inside the equipment during maintenance and replacement, and reduces the safety risks caused by improper operation.

[0050] Embodiment 3:

[0051] As shown in Figure 5 Unlike embodiment 2, the through hole on the flow guide mixing disc 2 is a second through hole 23, and the second through hole 23 is a circular truncated cone, so that the space for the pulverized coal and air to flow through in the second through hole 23 becomes smaller and smaller. With the decrease of the flow-through space, the mixing of the pulverized coal and air is more sufficient. This helps the pulverized coal particles to be more evenly distributed in the air, increases the contact area of the pulverized coal and oxygen, and thus improves the rate and efficiency of the combustion reaction; the pulverized coal particles are rapidly mixed with the high-temperature air in a smaller space, which can quickly reach the ignition point and cause a combustion reaction, shortens the ignition delay time, and makes the combustion process more rapid and stable.

[0052] In specific use, the motor 31 drives the fan blade 34 to rotate to drum air into the mixing pipe 4, while the pulverized coal enters the pipe 1 to drum in the pulverized coal, the air and the pulverized coal pass through the second through hole 23 on the flow guide mixing disc 2 to mix fully, the air and the pulverized coal mix with the oil entering through the oil inlet interface 8 and ignite to burn in the primary combustion chamber 6, and the remaining part burns in the secondary combustion chamber 7.

[0053] Embodiment 4:

[0054] As shown in the drawings, on the basis of Embodiment 2 or 3, as a further improvement of the present application, preferably, the secondary combustion chamber 7 is provided with a first oxygen supplement interface 10 and a second oxygen supplement interface 11, the first oxygen supplement interface 10 and the second oxygen supplement interface 11 are jointly connected with a U-shaped pipe 9, and the first oxygen supplement interface 10 and the second oxygen supplement interface 11 are both provided with a valve. Figure 1 In this embodiment, the air and the pulverized coal mix with the oil entering through the oil inlet interface 8 and ignite to burn in the primary combustion chamber 6, and the remaining part burns in the secondary combustion chamber 7, while the oxygen is supplemented through the first oxygen supplement interface 10 and the second oxygen supplement interface 11 to fully burn.

[0055] Because the oxygen supplement interface promotes the complete combustion of fuel, more chemical energy is converted into heat energy and released. This not only improves the heat energy output of the entire combustion system, but also makes the quality of heat energy (i.e. temperature, pressure and other parameters) more stable and efficient, which is conducive to the subsequent heat utilization process. The application of the oxygen supplement interface directly reduces the emission of unburned fuel and harmful gases. The emission of pollutants such as carbon monoxide, nitrogen oxides and particulate matter is greatly reduced, which not only improves the air quality around the combustion equipment, but also reduces the long-term negative impact on the environment. This is of great significance to green production and ecological environment protection.

[0056] Finally, it should be noted that: the above shows and describes the basic principles and main features of the present application and the advantages of the present application, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0057]

[0058] ​Furthermore, it should be understood that although the specification is described in terms of embodiments, each of which contains only one independent technical solution, the specification is described in this way only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that the skilled person can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A method of using a low-oil ignition pulverized coal combustion device for igniting a W-flame boiler, characterized in that, The device includes an air inlet pipe (3), the bottom end of which is connected to a mixing pipe (4), the mixing pipe (4) is connected to a coal powder inlet pipe (1) via a bypass, the connection between the coal powder inlet pipe (1) and the mixing pipe (4) is an inverted V shape, and a flow guiding mixing plate (2) is provided inside the mixing pipe (4), and through holes are evenly opened on the flow guiding mixing plate (2); The specific usage method is as follows: Powdered coal enters through the powdered coal inlet pipe (1), and air enters through the mixing pipe (4). The top of the powdered coal inlet pipe (1) is set in an inverted V shape so that the powdered coal enters the mixing pipe (4) in the same direction as the air. A flow guiding mixing plate (2) is set in the mixing pipe (4), and through holes are evenly opened on the flow guiding mixing plate (2). Powdered coal and air are mixed through each through hole.

2. The method of using the low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 1, characterized in that, The flow mixing disk (2) of the device has a first through hole (22), which is cylindrical.

3. The method of using the low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 1, characterized in that, The flow mixing disk (2) of the device is provided with a second through hole (23), which is frustum shaped.

4. The method of using the low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 1, characterized in that, The bottom of the flow mixing disc (2) of the device is welded with a mounting block (21), and the mounting block (21) and the mixing pipe (4) are fixed together by bolts.

5. The method of using a low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 1, characterized in that, The air inlet pipe (3) of the device is equipped with an air inlet assembly, which includes a support rod (32). Both ends of the support rod (32) are mounted on a U-shaped support connecting seat (33). A motor (31) is fixed on the support rod (32), and a fan blade (34) is fixedly mounted on the output shaft of the motor (31).

6. The method of using the low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 1, characterized in that, The bottom of the mixing pipe (4) of the device is fixedly connected to the oil mixing pipe (5), and the oil mixing pipe (5) is provided with an oil inlet (8).

7. The method of using a low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 6, characterized in that, The mixing pipe (5) of the device is connected to the primary combustion chamber (6) and the secondary combustion chamber (7). The secondary combustion chamber (7) is externally connected to the first oxygen supply port (10) and the second oxygen supply port (11). The first oxygen supply port (10) and the second oxygen supply port (11) are connected by a U-shaped pipe (9). Valves are provided on both the first oxygen supply port (10) and the second oxygen supply port (11).

8. The method of using a low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 5 or 7, characterized in that, The motor (31) drives the fan blade (34) to rotate and blow air into the mixing pipe (4). At the same time, coal powder enters the pipe (1) and is blown in. The air and coal powder pass through the through hole on the guide mixing plate (2) and are fully mixed. The air and coal powder are mixed with the oil that enters through the oil inlet (8) and ignited in the first-stage combustion chamber (6). The remaining part of the combustion is burned in the second-stage combustion chamber (7).

9. The method of using a low-oil ignition pulverized coal combustion device for W-flame boiler ignition according to claim 8, characterized in that, During combustion, oxygen is supplied through the first oxygen supply port (10) and the second oxygen supply port (11) for complete combustion.

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