A soot blowing system applied to a vertical coal-fired boiler

Abstract

The utility model discloses a kind of soot-blowing system applied to vertical coal-fired boiler, including vertical coal-fired boiler, tail end inside is formed with tail flue, several soot-blowers are arranged on the inner wall of tail flue two sides from bottom to top, several soot-blowers are connected at soot-blower control total system, under the control of soot-blower control total system, soot-blower control total system includes ignition system, gas supply system and control cabinet, ignition system and control cabinet are electrically connected, gas supply system and ignition system are electrically connected, start signal is provided to ignition system by control cabinet, after receiving start signal, ignition system will respond quickly and start gas supply system, gas supply system will transport appropriate gas to soot-blower according to preset parameter, ignition system simultaneously carries out ignition operation to the gas transported, generates high-temperature high-pressure pulse jet, this pulse jet is accurately acted on the heating surface of tail flue by the output end of soot-blower, to clear the soot accumulated or adhered on the heating surface of flue.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler soot blowing equipment, and in particular to a soot blowing system applied to a vertical coal-fired boiler. Background Technology

[0002] Vertical coal-fired boilers are a common type of thermal power equipment, widely used in industrial production, district heating, and other fields. Their working principle involves heating water into steam or hot water by burning pulverized coal to meet process or domestic needs. However, during long-term boiler operation, ash, unburned carbon particles, and potentially molten slag produced from coal combustion gradually deposit and adhere to the boiler's heating surfaces (such as the furnace water-cooled walls, superheaters, economizers, and air preheaters), forming ash and slag buildup.

[0003] Ash accumulation and slag buildup can lead to a series of serious negative impacts: the thermal conductivity of ash is much lower than that of metal heating surfaces, creating additional thermal resistance and severely hindering the transfer of heat from high-temperature flue gas to the working fluid (water, steam), resulting in increased boiler exhaust temperature, significantly reduced thermal efficiency, fuel waste, and increased operating costs; ash accumulation may cause localized overheating of the heating surfaces, leading to overheating and reduced strength of the metal tube walls, which may eventually result in serious accidents such as tube rupture, threatening equipment and personnel safety; ash accumulation in the flue reduces the flow cross-sectional area, increases flue gas flow resistance, forces the induced draft fan to increase its load, increases power consumption, and in severe cases may even cause fan surge or boiler positive pressure operation; and so on.

[0004] To solve the aforementioned ash accumulation problem, regular ash removal operations must be performed on the boiler's heating surfaces. Currently, common ash removal methods for vertical coal-fired boilers include: 1. Manual ash removal during boiler shutdown. This method requires the boiler to be completely shut down and cooled. Operators then enter the furnace through manholes or handholes, or use long-handled tools to mechanically clean the flue pipes from the outside. While simple and direct, this method has fatal drawbacks such as high labor intensity, harsh working environment (high temperature, high dust), long cleaning cycle, and disruption to production continuity. Furthermore, the cleaning effect largely depends on the worker's experience, making it difficult to achieve thorough and uniform cleaning, especially for deep, sticky ash deposits. 2. Ash removal using a simple soot blowing device. This device typically uses steam or compressed air as the medium, performing periodic purging during boiler operation. However, this method introduces a large amount of cold air or low-temperature steam into the furnace during soot blowing, easily causing a sudden drop in furnace temperature and pressure fluctuations, affecting combustion stability, and potentially leading to low-temperature corrosion of the tail heating surfaces. Utility Model Content

[0005] The purpose of this utility model is to provide a soot blowing system for vertical coal-fired boilers, which solves the technical problems of incomplete soot blowing, high labor intensity and other negative effects in the traditional soot blowing method in the prior art, which leads to a reduction in the service life of the boiler.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] A soot blowing system for a vertical coal-fired boiler includes a vertical coal-fired boiler, a tail flue is formed inside the tail end of the vertical coal-fired boiler, and a plurality of soot blowers are arranged from bottom to top on the inner walls of both sides of the tail flue. The output end of the soot blower acts on the heating surface in the tail flue, and the plurality of soot blowers are connected to a soot blower control system.

[0008] The sootblower control system includes an ignition system, a gas supply system, and a control cabinet. The ignition system is electrically connected to the control cabinet, and the gas supply system is electrically connected to the ignition system. The control cabinet provides a start signal to the ignition system to ignite the high-pressure gas from the gas supply system, forming a high-temperature, high-speed airflow that is ejected through the sootblower to remove accumulated ash and slag from the heated surfaces in the tail flue.

[0009] In the soot blowing system for a vertical coal-fired boiler described in this application embodiment, the tail flue is equipped with, from top to bottom, a high-temperature superheater tube group, a low-temperature superheater tube group, a first economizer tube group, a second economizer tube group, a third economizer tube group, a fourth economizer tube group, and an air preheater tube group.

[0010] In the soot blowing system for a vertical coal-fired boiler described in this application embodiment, 16 soot blowers are provided. One soot blower is provided on the inner walls of the left and right sides of the tail flue above the low-temperature superheater tube group, the first economizer tube group, the second economizer tube group, the third economizer tube group, the fourth economizer tube group, and the air preheater tube group. One soot blower is provided on the inner walls of the left and right sides of the tail flue above and below the high-temperature superheater tube group.

[0011] In a soot blowing system for a vertical coal-fired boiler as described in this application embodiment, the soot blower includes a mounting frame, a pulse canister, a pulse valve, a mounting flange end cover, and a pulse nozzle. The pulse canister is mounted on the outside of the furnace wall of the vertical coal-fired boiler via the mounting frame. The pulse valve is installed at the branch pipes extending from the upper and lower ends of the pulse canister. The mounting flange end cover is mounted on the furnace wall. The pulse nozzle is mounted on the mounting flange end cover and communicates with the pulse canister. The output end of the pulse nozzle acts on the heating surface of the tail flue.

[0012] In the soot blowing system for a vertical coal-fired boiler described in this application embodiment, the pulse nozzle is of the type with a longer upper part and a shorter lower part, and the output port is angled downward.

[0013] In a soot blowing system for a vertical coal-fired boiler described in this application embodiment, the gas supply system includes a gas storage cylinder, a manifold regulator, and a gas delivery pipe. Several gas storage cylinders are connected to the manifold regulator, and the manifold regulator is electrically connected to the ignition system through the gas delivery pipe.

[0014] In a soot blowing system for a vertical coal-fired boiler described in this application embodiment, the gas storage cylinder contains acetylene.

[0015] In a soot blowing system for a vertical coal-fired boiler described in this application embodiment, the air supply system further includes an air delivery pipe, one end of which is connected to a compressed air storage cylinder or an air pump, and the other end is connected to the ignition system.

[0016] In a soot blowing system for a vertical coal-fired boiler as described in this application embodiment, the ignition system includes an acetylene inlet pipe, a compressed air inlet pipe, a gas distribution ignition module, a welded water-cooled jacket, and a welded ignition section assembly. The two ends of the acetylene inlet pipe are respectively connected to a gas delivery pipe and the gas distribution ignition module. The two ends of the compressed air inlet pipe are respectively connected to an air delivery pipe and the gas distribution ignition module. The gas distribution ignition module is connected to the welded water-cooled jacket, and the welded water-cooled jacket is connected to the welded ignition section assembly.

[0017] In a soot blowing system for a vertical coal-fired boiler as described in this application embodiment, a distributor is also installed outside the furnace wall of the vertical coal-fired boiler. The branch pipes from the upper end of the pulse tank are connected to the distributor. The welded ignition section assembly is connected to the distributor, and the control cabinet is electrically connected to the distributor.

[0018] Compared with existing technologies, this utility model has the following beneficial effects:

[0019] This application provides a soot blowing system for a vertical coal-fired boiler. The soot blowing system includes an ignition system, a gas supply system, and a control cabinet. The control cabinet provides a start signal to the ignition system. Upon receiving the start signal, the ignition system quickly responds and starts the gas supply system. The gas supply system delivers an appropriate amount of gas to the soot blower according to preset parameters. Simultaneously, the ignition system ignites the delivered gas, generating a high-temperature, high-pressure pulse jet. This pulse jet precisely acts on the heated surface of the tail flue through the output end of the soot blower, thereby removing the accumulated or adhered ash from the heated surface of the tail flue. This overcomes the problems of incomplete cleaning, high labor intensity, and other negative impacts that reduce the service life of the boiler in traditional soot cleaning methods. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall system according to an embodiment of this application.

[0022] Figure 2 This is a front view of the tail flue section of a vertical coal-fired boiler in an embodiment of this application.

[0023] Figure 3 yes Figure 2 An enlarged diagram of A in the diagram.

[0024] Figure 4 This is a schematic diagram of the gas supply system in an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of the soot blower system in an embodiment of this application.

[0026] Explanation of key figure labels:

[0027] 100 - Vertical coal-fired boiler; 110 - Tail flue; 120 - High-temperature superheater tube assembly; 130 - Low-temperature superheater tube assembly; 140 - First economizer tube assembly; 150 - Second economizer tube assembly; 160 - Third economizer tube assembly; 170 - Fourth economizer tube assembly; 180 - Air preheater tube assembly; 190 - Distributor; 200 - Soot blower; 210 - Mounting bracket; 220 - Pulse tank; 230 - Mounting flange end cover; 240 - Pulse nozzle; 300 - Soot blower control system; 310 - Ignition. System, 311-Acetylene inlet pipe, 312-Compressed air inlet pipe, 313-Gas distribution and ignition module, 314-Welded water-cooled jacket, 315-Welded ignition section assembly, 316-Automatic gas pressure stabilization system, 317-Automatic compressed air pressure stabilization system, 318-Air flame arrestor filter assembly, 319-Gas buffer flame arrestor filter assembly, 320-Gas supply system, 321-Gas storage cylinder, 322-Combiner pressure regulator, 323-Gas delivery pipe, 324-Air delivery pipe, 330-Control cabinet. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0033] Example

[0034] like Figures 1 to 5 As shown, a soot blowing system for a vertical coal-fired boiler includes a vertical coal-fired boiler 100. A tail flue 110 is formed inside the tail end of the vertical coal-fired boiler 100. Several soot blowers 200 are arranged from bottom to top on the inner walls of both sides of the tail flue 110. The output end of the soot blower 200 acts on the heating surface inside the tail flue 110. Several soot blowers 200 are connected to a soot blower control system 300 and are controlled by the soot blower control system 300 to generate pulse jets to remove the ash accumulated or attached to the heating surface of the tail flue 110.

[0035] Preferably, the sootblower control system 300 includes an ignition system 310, a gas supply system 320, and a control cabinet 330. The ignition system 310 is electrically connected to the control cabinet 330, and the gas supply system 320 is electrically connected to the ignition system 310. The control cabinet 330 provides a start signal to the ignition system 310. Upon receiving the start signal, the ignition system 310 quickly responds and starts the gas supply system 320. The gas supply system 320 delivers an appropriate amount of gas to the sootblower 200 according to preset parameters. Simultaneously, the ignition system 310 ignites the delivered gas, generating a high-temperature, high-pressure pulse jet. This pulse jet precisely acts on the heated surface in the tail flue 110 through the output end of the sootblower 200, thereby effectively removing the accumulated or adhered ash from the heated surface.

[0036] In some preferred embodiments, the structure is the same as that of a conventional coal-fired boiler, with the tail flue 110 having, from top to bottom, a high-temperature superheater tube group 120, a low-temperature superheater tube group 130, a first economizer tube group 140, a second economizer tube group 150, a third economizer tube group 160, a fourth economizer tube group 170, and an air preheater tube group 180. Using the aforementioned tube assemblies as reference targets for setting the positions of the soot blowers 200, this scheme includes a total of 16 soot blowers 200. One soot blower 200 is installed on the inner walls of the left and right sides of the tail flue 110 above the low-temperature superheater tube assembly 130, the first economizer tube assembly 140, the second economizer tube assembly 150, the third economizer tube assembly 160, the fourth economizer tube assembly 170, and the air preheater tube assembly 180. Another soot blower 200 is installed on the inner walls of the left and right sides of the tail flue 110 above and below the high-temperature superheater tube assembly 120. The soot blowers 200 located on both sides of the inner wall of the tail flue 110 are arranged opposite each other, and are used to remove accumulated ash from the heated surfaces of the flue.

[0037] Preferably, the sootblower 200 includes a mounting frame 210, a pulse canister 220, a pulse valve, a mounting flange end cap 230, and a pulse nozzle 240. The pulse canister 220 is mounted on the outside of the furnace wall of the vertical coal-fired boiler 100 corresponding to the tail flue 110 via the mounting frame 210. The pulse valve is installed at the branch pipes extending from the upper and lower ends of the pulse canister 220. The mounting flange end cap 230 is mounted on the furnace wall. The pulse nozzle 240 is mounted on the mounting flange end cap 230 and communicates with the pulse canister 220. The output end of the pulse nozzle 240 acts on the heating surface inside the tail flue 110. To achieve a better sootblowing effect, the pulse nozzle 240 is longer at the top and shorter at the bottom, with its output port angled downwards.

[0038] Preferably, the gas supply system 320 includes a gas storage cylinder 321, a manifold regulator 322, and a gas delivery pipe 323. Several gas storage cylinders 321 are connected to the manifold regulator 322, and the manifold regulator 322 is electrically connected to the ignition system 310 through the gas delivery pipe 323.

[0039] In some preferred embodiments, the gas cylinder 321 stores acetylene. The gas supply system 320 also includes an air delivery pipe 324, one end of which is connected to a compressed air storage cylinder or an air pump, and the other end is connected to the ignition system 310. Under the action of the ignition system 310, the acetylene and compressed air undergo deflagration to generate a high-temperature, high-pressure, and high-energy pulse wave. The pulse wave is released below the pulse tank 220 and directed to the ash-accumulated area of ​​the boiler via the pulse nozzle 240.

[0040] Preferably, the ignition system 310 includes an acetylene inlet pipe 311, a compressed air inlet pipe 312, a gas distribution ignition module 313, a welded water-cooled jacket 314, and a welded ignition section assembly 315. The two ends of the acetylene inlet pipe 311 are respectively connected to a gas delivery pipe 323 and the gas distribution ignition module 313. The two ends of the compressed air inlet pipe 312 are respectively connected to an air delivery pipe 324 and the gas distribution ignition module 313. The gas distribution ignition module 313 is connected to the welded water-cooled jacket 314, and the welded water-cooled jacket 314 is connected to the welded ignition section assembly 315.

[0041] Further details: An automatic gas pressure stabilization system 316 is installed on the acetylene inlet pipe 311, and an automatic compressed air pressure stabilization system 317 is installed on the compressed air inlet pipe 312. The automatic gas pressure stabilization system 316 includes a first shut-off valve, a first Y-type filter, and an acetylene pressure reducing valve connected in sequence. A brass check valve is also installed between the acetylene pressure reducing valve and the gas distribution ignition module 313. The automatic compressed air pressure stabilization system 317 includes a second shut-off valve, a second Y-type filter, and an air pressure reducing valve 28 connected in sequence. An external water jacket mixer assembly is installed on the welded water-cooled jacket 314. The external water jacket mixer assembly includes a mixing device, a first galvanized malleable iron tee, and a first check valve connected in sequence. Located inside the welded water-cooled jacket 314, the first galvanized malleable iron tee and the first check valve are located outside the welded water-cooled jacket 314. The two output ends of the gas distribution ignition module 313 are respectively connected to the external water jacket mixer assembly through an air buffer flame arrestor filter assembly 318 and a gas buffer flame arrestor filter assembly 319. Specifically, the gas buffer flame arrestor filter assembly 319, starting from the gas distribution ignition module 313, includes a second check valve, a second galvanized malleable iron tee, and an acetylene flame arrestor filter connected in sequence. The other end of the acetylene flame arrestor filter is connected to the first check valve of the external water jacket mixer assembly. The air buffer flame arrestor filter assembly 318, starting from the gas distribution ignition module 313, includes an air buffer flame arrestor filter connected in sequence. The air flame arrestor filter and stainless steel check valve are included. The other end of the air flame arrestor filter is connected to the gas distribution and ignition module 313 via a brass check valve. The other end of the stainless steel check valve is connected to the third end of the first galvanized malleable iron tee of the external water jacket mixer assembly. The third end of the second galvanized malleable iron tee is connected to a bypass pipe, which is equipped with a solenoid valve. The other end of the bypass pipe is connected to a third galvanized malleable iron tee, which is connected to the compressed air inlet pipe 312, located between the gas distribution and ignition module 313 and the compressed air automatic pressure stabilization system 317. A distributor 190 is also installed outside the furnace wall of the vertical coal-fired boiler 100 corresponding to the tail flue 110. The branch pipe from the upper end of the pulse tank 220 is connected to the distributor 190. In this embodiment, there are two distributors 190, each of which is connected to eight soot blowers 200. The end of the welded ignition section assembly 315 furthest from the welded water-cooled jacket 314 is connected to the distributor 190. The welded ignition section assembly 315 includes three sequentially welded copper tees. The first end of the first copper tee is connected to the welded water-cooled jacket 314, the second end is connected to an over-temperature probe, and the third end is connected to the second copper tee. The first and second ends of the second copper tee are respectively connected to the first and third copper tees. The third end is connected to the ignition head. The second end of the third copper tee serves as the output end and is connected to the distributor 190. An exhaust / water ball valve is provided at the third end.The control cabinet 330 is electrically connected to the distributor 190. The distributor 190 delivers high-temperature, high-pressure explosive gas to each sootblower 200, and the gas is released through the sootblower 200 to complete the ash removal operation of the vertical coal-fired boiler 100.

[0042] In summary, this utility model provides a soot blowing system for a vertical coal-fired boiler. The soot blowing system includes an ignition system, a gas supply system, and a control cabinet. The control cabinet provides a start signal to the ignition system. Upon receiving the start signal, the ignition system quickly responds and starts the gas supply system. The gas supply system delivers an appropriate amount of gas to the soot blower according to preset parameters. Simultaneously, the ignition system ignites the delivered gas, generating a high-temperature, high-pressure pulse jet. This pulse jet precisely acts on the heated surface of the tail flue through the output end of the soot blower, thereby removing the accumulated or adhered ash from the heated surface of the flue. This overcomes the problems of incomplete cleaning, high labor intensity, and other negative impacts that reduce the service life of the boiler caused by traditional soot blowing methods.

[0043] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A soot blowing system for a vertical coal-fired boiler, comprising a vertical coal-fired boiler, wherein a tail flue is formed inside the tail end of the vertical coal-fired boiler, characterized in that, Several soot blowers are arranged from bottom to top on the inner walls of both sides of the tail flue. The output end of the soot blower acts on the heating surface in the tail flue. Several soot blowers are connected to the soot blower control system. The sootblower control system includes an ignition system, a gas supply system, and a control cabinet. The ignition system is electrically connected to the control cabinet, and the gas supply system is electrically connected to the ignition system. The control cabinet provides a start signal to the ignition system to ignite the high-pressure gas from the gas supply system, forming a high-temperature, high-speed airflow that is ejected through the sootblower to remove accumulated ash and slag from the heated surfaces in the tail flue.

2. The soot blowing system for a vertical coal-fired boiler as described in claim 1, characterized in that, The tail flue is equipped with, from top to bottom, a high-temperature superheater tube group, a low-temperature superheater tube group, a first economizer tube group, a second economizer tube group, a third economizer tube group, a fourth economizer tube group, and an air preheater tube group.

3. The soot blowing system for a vertical coal-fired boiler as described in claim 2, characterized in that, Sixteen soot blowers are provided. One soot blower is provided on the inner wall of the tail flue above the low-temperature superheater tube group, the first economizer tube group, the second economizer tube group, the third economizer tube group, the fourth economizer tube group and the air preheater tube group. One soot blower is provided on the inner wall of the tail flue above and below the high-temperature superheater tube group.

4. The soot blowing system for a vertical coal-fired boiler as described in claim 1, characterized in that, The soot blower includes a mounting frame, a pulse canister, a pulse valve, a mounting flange end cover, and a pulse nozzle. The pulse canister is mounted on the outside of the furnace wall of the vertical coal-fired boiler via the mounting frame. The pulse valve is installed at the branch pipes extending from the upper and lower ends of the pulse canister. The mounting flange end cover is mounted on the furnace wall. The pulse nozzle is mounted on the mounting flange end cover and communicates with the pulse canister. The output end of the pulse nozzle acts on the heating surface of the tail flue.

5. The soot blowing system for a vertical coal-fired boiler as described in claim 4, characterized in that, The pulse nozzle is longer at the top and shorter at the bottom, and the output port is angled downwards.

6. The soot blowing system for a vertical coal-fired boiler as described in claim 4, characterized in that, The gas supply system includes gas cylinders, a manifold regulator, and a gas delivery pipe. Several gas cylinders are connected to the manifold regulator, and the manifold regulator is electrically connected to the ignition system through the gas delivery pipe.

7. A soot blowing system for a vertical coal-fired boiler as described in claim 6, characterized in that, The gas cylinder contains acetylene.

8. The soot blowing system for a vertical coal-fired boiler as described in claim 7, characterized in that, The air supply system also includes an air delivery pipe, one end of which is connected to a compressed air storage cylinder or an air pump, and the other end is connected to the ignition system.

9. A soot blowing system for a vertical coal-fired boiler as described in claim 8, characterized in that, The ignition system includes an acetylene inlet pipe, a compressed air inlet pipe, a gas distribution ignition module, a welded water-cooled jacket, and a welded ignition section assembly. The two ends of the acetylene inlet pipe are respectively connected to a gas delivery pipe and the gas distribution ignition module. The two ends of the compressed air inlet pipe are respectively connected to an air delivery pipe and the gas distribution ignition module. The gas distribution ignition module is connected to the welded water-cooled jacket, and the welded water-cooled jacket is connected to the welded ignition section assembly.

10. A soot blowing system for a vertical coal-fired boiler as described in claim 9, characterized in that, A distributor is also installed outside the furnace wall of the vertical coal-fired boiler. The branch pipes from the upper end of the pulse tank are connected to the distributor. The welded ignition section assembly is connected to the distributor. The control cabinet is electrically connected to the distributor.

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