A structure for preventing ash deposition in a boiler flue of a thermal power plant and a method for using the same

Abstract

This invention relates to the field of boiler flue technology, and discloses an anti-ash accumulation structure for boiler flues in thermal power plants and its usage method. The anti-ash accumulation structure includes an anti-dust accumulation component, a U-frame, an L-shaped stepped seat, nozzles, and a baffle pipe. The boiler horizontal pipe has at least two slots on its outer wall, and the anti-dust accumulation component is installed at each slot. The anti-dust accumulation component includes two sets of U-frames, which are fitted together around the slots. An L-shaped stepped seat is fixed at the inner corner of each set of the anti-dust accumulation component, forming a seal against the slot. Multiple sets of nozzles are installed on the inner side of the L-shaped stepped seat, and the nozzles are connected to a baffle pipe that blows air along the length of the boiler horizontal pipe's inner wall. This invention increases the gas flow along the inner wall of the boiler flue, reducing the contact area and duration between ash and slag in the flue gas and the pipe, thus preventing ash and slag deposition on the inner wall of the pipe. Through the slotting of the boiler horizontal pipe and the coordinated connection of paired U-frames, the existing boiler horizontal pipe can be upgraded.

Description

Technical Field

[0001] This invention relates to the field of boiler flue technology, specifically to an anti-ash accumulation structure for boiler flues in thermal power plants and its application method. Background Technology

[0002] During the combustion process, coal-fired boilers produce a large amount of ash and slag, which is carried into the boiler's tail-end heating surface by the flue gas. Due to gravity, some of the ash and slag settles at the bottom of the horizontal flue. In addition, due to coal quality and combustion adjustments, ash and slag adhere to the tube walls of the boiler's tail-end heating surface. When the boiler is shut down for maintenance, the ash and slag adhering to the tube walls of the tail-end heating surface must be cleaned. The cleaned-off ash and slag fall and settle in the horizontal flue area.

[0003] Although some boilers are designed with ash conveying devices in the horizontal flue at the tail end, these devices can convey the high-temperature dry ash that falls during boiler operation. However, the original ash conveying system often encounters problems such as ash blockage and poor conveying when conveying ash that has settled and hardened at the bottom of the horizontal flue and low-temperature ash that falls during the cleaning of the superheater and reheater tube walls during boiler shutdown and maintenance.

[0004] Currently, the method for handling ash and slag accumulated in the horizontal flue of a boiler is as follows: the ash and slag are manually bagged and transferred to the stairwell outside the manhole, and then carried by hand to the top of the ladder to the boiler's ground level. This process not only causes ash to scatter and pollute the environment, but also consumes a significant amount of manpower and time. Furthermore, the ash bags piled up in the boiler stairwell can easily block safety passages, creating safety hazards. Therefore, a structure to prevent ash accumulation in the boiler flue of a thermal power plant is proposed. Summary of the Invention

[0005] To address existing problems, this invention provides an anti-ash accumulation structure for boiler flues in thermal power plants. By increasing gas flow along the inner wall of the boiler flue, the contact area and duration between ash and slag in the flue gas and the pipe are reduced, preventing ash and slag from depositing on the inner wall of the pipe. The existing boiler horizontal pipes can be upgraded through slotting and the matching connection of paired U-frames. A good seal for the boiler horizontal pipes is achieved through the orthogonal decomposition of the L-shaped stepped seat and the slotted opening.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] This invention provides a structure for preventing ash accumulation in the flue gas duct of a thermal power plant boiler, including an anti-dust accumulation component, a U-frame, an L-shaped stepped seat, nozzles, and a baffle pipe. The boiler horizontal duct has at least two slots on its outer wall, and the anti-dust accumulation component is installed at each slot. Each anti-dust accumulation component includes two sets of U-frames, which are fitted together around the slots. An L-shaped stepped seat is fixed at the inner corner of each set of the anti-dust accumulation component, forming a seal against the slots. Multiple sets of nozzles are installed on the inner side of the L-shaped stepped seat, and each nozzle is connected to a baffle pipe that blows air along the length of the inner wall of the boiler horizontal duct.

[0008] As a further improvement of the present invention, a vibration assembly is also included; the vibration assembly includes a housing, a drive motor and a striking block; the vibration assembly is provided on the lower side of the outer wall of the boiler horizontal pipe, the vibration assembly includes a housing connected to the bottom of the boiler horizontal pipe, the housing is provided with a striking block, and the housing is provided with a drive motor for pulling the striking block to reciprocate to impact the surface of the boiler horizontal pipe.

[0009] As a further improvement of the present invention, the vibration assembly further includes a pressing disc, a constraint frame, and a drive shaft; the constraint frame is provided with a sliding groove; one side of the striking block extends out of the drive shaft, and the drive shaft extends through the sliding groove to the outside of the constraint frame; the output end of the drive motor is connected to the pressing disc, which is used to reciprocate to press the drive shaft up and down.

[0010] As a further improvement of the present invention, the bottom of the striking block is provided with a spring connected to the constraint frame.

[0011] As a further improvement of the present invention, an elastic sealing strip is provided between the L-shaped stepped seat and the slot.

[0012] As a further improvement of the present invention, the U-frame is provided with air holes, which are connected to the input pipe formed by the extension of the U-frame; the inner side of the L-shaped stepped seat is provided with a baffle pipe, and the baffle pipe is provided with nozzles along its length direction. The outer wall of the baffle pipe is provided with multiple sets of air jet slits at equal intervals along its length direction; the air holes are used to deliver gas to the multiple sets of nozzles and the baffle pipe.

[0013] As a further improvement of the invention, the nozzles on the bleed tube are oriented to form a vortex-shaped airflow.

[0014] As a further improvement of the present invention, the U-frame is provided with water holes, which are connected to water supply pipes formed by the extension of the U-frame; a spray pipe is provided on the inner side of the L-shaped stepped seat, and spray heads are provided along the length of the spray pipe; the water holes are used to deliver spray to multiple sets of spray heads.

[0015] As a further improvement of the present invention, the slotted opening is an L-shaped channel adapted to the L-shaped stepped seat at the external corner position of the horizontal pipe of the boiler.

[0016] This invention also provides a method for using an anti-ash accumulation structure for boiler flue gas in thermal power plants, comprising the following steps: During the operation of the boiler in the thermal power plant, the gas supply of the dust prevention component is turned on. The gas is transported through the U-frame to the turbulence pipe inside the L-shaped stepped seat. The gas is ejected from the turbulence pipe and the nozzles arranged in a vortex shape along its length, blowing along the length of the inner wall of the boiler's horizontal pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This structure incorporates anti-dust accumulation components at the slotted openings of the boiler's horizontal pipes. By using a baffle pipe and nozzles to blow air along the length of the pipe's inner wall, airflow disturbance is created, effectively preventing dust in the flue gas from depositing on the inner wall of the pipe. This prevents dust accumulation, ensures unobstructed flow in the boiler flue, and improves boiler operating efficiency.

[0018] Preferably, the vibration component can generate mechanical vibration to further help prevent dust from adhering to the inner wall of the pipe. The drive motor drives the striking block to reciprocate to strike the pipe surface, causing the pipe to vibrate. This can loosen and remove dust that has already adhered to the inner wall of the pipe, enhancing the anti-dust accumulation effect and extending the service life of the pipe.

[0019] Preferably, the rotational motion of the drive motor can be converted into the reciprocating linear motion of the striking block through the cooperation of the extrusion disc, constraint frame, and drive shaft, thereby achieving regular striking of the boiler's horizontal pipe surface by the striking block. This transmission method is simple in structure, reliable, and can stably generate vibration effects.

[0020] Preferably, the spring serves as a buffer and a reset mechanism. After the striking block impacts the pipe surface, the spring allows the striking block to quickly reset, preparing it for the next impact. This ensures that the striking block can continuously and stably strike the pipe, enhancing the vibration effect. At the same time, it reduces the impact force between the striking block and the constraint frame, extending the equipment's service life.

[0021] Preferably, the elastic sealing strip can effectively seal the gap between the L-shaped stepped seat and the slot, preventing flue gas leakage. Flue gas leakage not only wastes energy but may also pollute the surrounding environment. At the same time, a good seal can also ensure stable pressure inside the anti-dust accumulation component, ensuring that the baffle tube and nozzle can work normally and improving the anti-dust accumulation effect; the elastic sealing strip can also absorb the impact transmitted from the hammering block to the horizontal pipes of the boiler and reduce the misalignment of the L-shaped stepped seat and the slot caused by repeated hammering.

[0022] Preferably, the air holes and inlet pipe on the U-frame provide a stable air supply for the baffle pipe and nozzle. The multiple sets of air jet slits opened on the outer wall of the baffle pipe can increase the gas injection area and injection range, making the airflow more evenly distributed on the inner wall of the pipe, enhancing the airflow disturbance effect, and further improving the anti-dust accumulation capability.

[0023] Preferably, the nozzle is oriented to create a vortex-like airflow, which enables the airflow to form complex vortex motions within the pipe. This vortex motion can more effectively entrain and carry away dust from the inner wall of the pipe. Compared to airflow in a single direction, it can remove dust more thoroughly and greatly improve the anti-dust accumulation effect.

[0024] Preferably, by setting up a spray device, a spray agent can be sprayed into the pipes during boiler operation. The spray agent can adsorb or dissolve dust particles in the flue gas, increasing the weight of the dust particles and making them easier to settle. It can also be used in conjunction with a tapping block to reduce dust flying and adhesion and caking. The spray device, combined with the anti-dust accumulation component and the vibration component, can form a multi-layered anti-dust accumulation system, further improving the anti-dust accumulation effect.

[0025] Preferably, an L-shaped channel adapted to the L-shaped stepped seat is opened at the external corner of the boiler's horizontal pipe. This allows the L-shaped stepped seat to fit better with the pipe, improving sealing performance. Simultaneously, this design also makes the installation of the anti-dust accumulation component more secure, reducing loosening or damage caused by pipe vibration or airflow impact, and ensuring the long-term stable operation of the anti-dust accumulation structure.

[0026] This method ensures that the dust prevention components are activated in a timely manner during boiler operation, allowing the baffle tubes and nozzles to function properly, creating effective airflow disturbance, achieving the purpose of preventing ash accumulation, and ensuring the normal operation of the boiler flue. Attached Figure Description

[0027] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a schematic diagram of the three-dimensional structure of the boiler piping in Example 1; Figure 2 This is a cross-sectional view of the horizontal pipe in Example 1; Figure 3 This is a schematic diagram of the unfolded structure of the U-frame in Example 1; Figure 4 This is a bottom view of the vibration assembly in Example 1; Figure 5 This is a schematic diagram of the unfolded structure of the vibration component in Example 1; Figure 6 This is a side sectional view of the constraint frame in Example 1.

[0028] Among them, 100 is the boiler horizontal pipe; 110 is the boiler vertical pipe; 120 is the dust prevention component; 121 is the U-frame; 122 is the L-shaped stepped seat; 123 is the nozzle; 124 is the air hole; 125 is the baffle pipe; 126 is the air jet slit; 127 is the input pipe; 128 is the extension pipe; 130 is the L-channel; 140 is the pad; 200 is the vibration component; 210 is the support plate; 220 is the outer shell; 230 is the extrusion plate; 240 is the drive motor; 250 is the constraint frame; 260 is the striking block; 270 is the spring; and 280 is the drive shaft. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0030] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1 This embodiment provides a structure for preventing ash accumulation in the flue gas duct of a thermal power plant boiler, including an anti-dust accumulation component, a U-frame, an L-shaped stepped seat, nozzles, and a baffle pipe. The boiler horizontal duct has at least two slots on its outer wall, and the anti-dust accumulation component is installed at each slot. The anti-dust accumulation component includes two sets of U-frames, which are fitted together around the slots. An L-shaped stepped seat is fixed at the inside corner of each set of the anti-dust accumulation component, and the L-shaped stepped seat forms a seal against the slot. Multiple sets of nozzles are provided on the inner side of the L-shaped stepped seat, and the nozzles are connected to a baffle pipe that blows air along the length of the inner wall of the boiler horizontal duct.

[0033] Specifically, such as Figure 1-3 As shown, one end of the boiler horizontal pipe 100 is connected to the boiler vertical pipe 110. The outer wall of the boiler horizontal pipe 100 is fitted with a dust-proof component 120 extending into the interior. The dust-proof component 120 includes two sets of U-frames 121 forming a frame and is fitted on the outside of the boiler horizontal pipe 100. Each set of dust-proof components 120 has an L-shaped step seat 122 fixed at the inside corner. The inner side of the L-shaped step seat 122 is connected to multiple sets of nozzles 123 distributed in an inclined manner. One side of the nozzles 123 is connected to a turbulence pipe 125 that can blow air along the length of the inner wall of the boiler horizontal pipe 100.

[0034] This embodiment also includes a vibration assembly, which includes a housing, a drive motor, and a striking block. The vibration assembly is provided on the lower side of the outer wall of the boiler horizontal pipe. The vibration assembly includes a housing connected to the bottom of the boiler horizontal pipe. The housing contains a striking block and a drive motor, which is used to pull the striking block to reciprocate and impact the surface of the boiler horizontal pipe.

[0035] Specifically, such as Figure 4 and Figure 6 As shown, a vibration assembly 200 is installed on the lower surface of the outer wall of the boiler horizontal pipe 100. The vibration assembly 200 includes a housing 220 connected to the bottom of the boiler horizontal pipe 100, a striking block 260 is provided inside the housing 220, and a drive motor 240 is installed inside the housing 220 to pull the striking block 260 to reciprocate to strike the lower surface of the boiler horizontal pipe 100.

[0036] The vibration assembly also includes a pressing disc, a constraint frame, and a drive shaft; the constraint frame is provided with a sliding groove; one side of the striking block extends out of the drive shaft, and the drive shaft extends through the sliding groove to the outside of the constraint frame; the output end of the drive motor is connected to the pressing disc, which is used to reciprocate to press the drive shaft to make it rise and fall.

[0037] Specifically, such as Figure 5As shown, the vibration assembly 200 also includes a constraint frame 250 sleeved on the outside of the striking block 260 and fixed to the housing 220. A drive shaft 280 extending to the outside of the constraint frame 250 is fixed on one side of the striking block 260. The output end of the drive motor 240 is provided with a pressing disc 230 that can reciprocate to press the drive shaft 280 up and down.

[0038] Preferably, the bottom of the striking block is provided with a spring connected to the constraint frame.

[0039] Specifically, such as Figure 6 As shown, the bottom of the striking block 260 is provided with two sets of springs 270 connected to the constraint frame 250. The outer wall of the constraint frame 250 is provided with a long straight groove, and the drive shaft 280 can slide back and forth along the length of the long straight groove.

[0040] As a preferred embodiment, an elastic sealing strip may be provided between the L-shaped stepped seat and the slot.

[0041] The U-frame is provided with air holes, which are connected to the input pipe formed by the extension of the U-frame; the inner side of the L-shaped stepped seat is provided with a baffle pipe, and nozzles are provided along the length of the baffle pipe. Multiple sets of air jet slits are equidistantly opened on the outer wall of the baffle pipe along its length; the air holes are used to deliver gas to the multiple sets of nozzles and the baffle pipe.

[0042] Specifically, such as Figure 3 As shown, the U-frame 121 has a hollow structure inside. The bottom of the U-frame 121 is connected to an input pipe 127. The inner wall of the U-frame 121 has an air hole 124 that communicates with the L-shaped stepped seat 122. The air hole 124 can deliver gas to multiple sets of nozzles 123 and baffle pipes 125. The outer wall of the baffle pipe 125 has multiple sets of air jet slits 126 equidistantly opened along its length.

[0043] As a preferred embodiment, the nozzles on the spoiler are oriented to create a vortex-like airflow.

[0044] Optionally, the U-frame is provided with water holes, which are connected to water supply pipes formed by the extension of the U-frame; a spray pipe is provided on the inner side of the L-shaped stepped seat, and spray heads are provided along the length of the spray pipe; the water holes are used to deliver spray to multiple sets of spray heads.

[0045] As a preferred embodiment, the slot is an L-shaped channel adapted to an L-shaped stepped seat, which is opened at the external corner of the horizontal pipe of the boiler.

[0046] Specifically, such as Figure 3 and 4 As shown, an L-shaped channel 130 adapted to the L-shaped stepped seat 122 is provided at the external corner of the boiler horizontal pipe 100, and the ends of the two sets of U-shaped frames 121 are fixedly connected by bolts.

[0047] like Figure 4 As shown, a pad 140 is fixed at the position where the lower surface of the boiler horizontal pipe 100 meets the outer casing 220, and the outer casing 220 is fixed to the bottom of the pad 140 with screws.

[0048] This invention also provides a method for using an anti-ash accumulation structure for boiler flue gas in thermal power plants, comprising the following steps: During the operation of the boiler in the thermal power plant, the gas supply of the dust prevention component is turned on. The gas is transported through the U-frame to the turbulence pipe inside the L-shaped stepped seat. The gas is ejected from the turbulence pipe and the nozzles arranged in a vortex shape along its length, blowing along the length of the inner wall of the boiler's horizontal pipe.

[0049] Please see Figure 2 and Figure 4 Two sets of support plates 210 are fixed inside the outer casing 220 near the bottom. The constraint frame 250 and the drive motor 240 are respectively assembled on the upper surface of the support plate 210.

[0050] The constraint frame 250 and the drive motor 240 provide stable support, ensuring that the striking block 260 stably vibrates the boiler horizontal pipe 100.

[0051] The operating principle of this embodiment is as follows: First, align the L-shaped stepped seat 122 with the L-channel 130. After the U-frame 121 is completely fitted onto the outside of the boiler horizontal pipe 100, use bolts to fix it. External equipment supplies gas into the U-frame 121 through the input pipe 127. The gas enters the L-shaped stepped seat 122 through the air hole 124 and is then delivered to multiple sets of nozzles 123 and turbulence pipes 125. The nozzles 123 are distributed at an angle and blow air towards the center of the boiler horizontal pipe 100 to form an airflow barrier to prevent ash and slag deposition. At the same time, the turbulence pipes 125 spray gas at equal intervals through the air jet slits 126 to generate continuous turbulence and create an airflow layer on the inner wall around the boiler horizontal pipe 100 to prevent ash and slag from accumulating. Simultaneously, in coordination with the vibration component 200, the drive motor 240 drives the extrusion disc 230 to rotate, and the reciprocating extrusion drive shaft 280 rises and falls, causing the striking block 260 to strike the pad plate 140 under the action of the spring 270, generating vibration waves to loosen the ash accumulation. This causes the ash deposited on the inner wall of the boiler horizontal pipe 100 to vibrate and be blown away with the internal flue gas or injected gas, making it easy to remove efficiently through the ash conveying device.

[0052] The drive motor 240 of the vibration component 200 is connected to the power plant's DCS system via a frequency converter controller, which can adjust the striking frequency in real time according to the ash content of the flue gas. The pad is a high-temperature resistant alloy plate, which is fixed to the bottom of the boiler horizontal pipe 100 by bolts.

[0053] Example 2 The difference between this embodiment and Embodiment 1 is that: 1) An extension tube 128 is provided on the inner side of the L-shaped stepped seat 122, and the extension tube 128 is connected to the end of the turbulence tube.

[0054] Specifically, such as Figure 3 As shown, an extension pipe 128 is sleeved on the vertical end of the upper part of the baffle pipe 125. The outer wall of the extension pipe 128 is also provided with a jet slit 126, which allows two sets of baffle pipes 125 in the same set of U-frames 121 to be connected to form a U-shaped pipe. At the same time, the extension pipe 128 can slide upward along the axis of the baffle pipe 125 and can easily enter the boiler horizontal pipe 100 through the L-channel 130.

[0055] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A structure for preventing ash accumulation in the flue of a thermal power plant boiler, comprising a horizontal boiler pipe (100), one end of which is connected to a vertical boiler pipe (110), characterized in that, The system includes a dust-proof assembly (120), a U-frame (121), an L-shaped stepped seat (122), a nozzle (123), and a baffle pipe (125). The boiler horizontal pipe (100) has at least two slots on its outer wall, and the slots are equipped with dust-proof assemblies (120). The dust-proof assembly (120) includes two sets of U-frames (121), which surround and fit over the slots. Each set of dust-proof assemblies (120) has an L-shaped stepped seat (122) fixed at its inner corner, which seals the slots. The L-shaped stepped seat (122) has multiple sets of nozzles (123) on its inner side, and each nozzle (123) is connected to a baffle pipe (125) that blows air along the length of the inner wall of the boiler horizontal pipe (100).

2. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 1, characterized in that, It also includes a vibration assembly (200); the vibration assembly (200) includes a housing (220), a drive motor (240) and a striking block (260); the vibration assembly (200) is provided on the lower side of the outer wall of the boiler horizontal pipe (100), the vibration assembly (200) includes a housing (220) connected to the bottom of the boiler horizontal pipe (100), the striking block (260) is provided inside the housing (220), and the drive motor (240) is provided inside the housing (220) for pulling the striking block (260) to reciprocate to impact the surface of the boiler horizontal pipe (100).

3. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 2, characterized in that, The vibration assembly (200) also includes a pressing disc (230), a constraint frame (250), and a drive shaft (280); the constraint frame (250) is provided with a sliding groove; one side of the striking block (260) extends out of the drive shaft (280), and the drive shaft (280) extends through the sliding groove to the outside of the constraint frame (250); the output end of the drive motor (240) is connected to the pressing disc (230), and the pressing disc (230) is used to reciprocate to press the drive shaft (280) up and down.

4. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 3, characterized in that, The bottom of the striking block (260) is provided with a spring (270) connected to the constraint frame (250).

5. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 3, characterized in that, An elastic sealing strip is provided between the L-shaped stepped seat (122) and the slot.

6. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 1, characterized in that, The U-frame (121) is provided with an air hole (124), which is connected to the input pipe (127) formed by the extension of the U-frame (121); the L-shaped stepped seat (122) is provided with a baffle pipe (125) on the inner side, and the baffle pipe (125) is provided with a nozzle (123) along its length direction. The outer wall of the baffle pipe (125) is provided with multiple sets of air jet slits (126) at equal intervals along its length direction; the air hole (124) is used to deliver gas to the multiple sets of nozzles (123) and the baffle pipe (125).

7. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 6, characterized in that, The nozzles (123) on the spoiler tube (125) are aligned with its orientation to form a vortex-shaped airflow.

8. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 6, characterized in that, The U-frame (121) is provided with a water hole, which is connected to a water supply pipe formed by the extension of the U-frame (121); a spray pipe is provided on the inner side of the L-shaped stepped seat (122), and a spray head is provided along the length of the spray pipe; the water hole is used to deliver spray to multiple spray heads.

9. The anti-ash accumulation structure for boiler flue in thermal power plants according to claim 1, characterized in that, The slot is an L-shaped channel (130) adapted to the L-shaped step seat (122) at the external corner of the boiler horizontal pipe (100).

10. A method of using the anti-ash accumulation structure for boiler flue gas in a thermal power plant as described in any one of claims 1 to 9, characterized in that, Includes the following steps: During the operation of the boiler in the thermal power plant, the gas supply of the dust prevention component (120) is turned on. The gas is transported through the U-frame (121) to the turbulence pipe (125) inside the L-shaped stepped seat (122). The gas is ejected from the turbulence pipe (125) and the vortex-shaped nozzle (123) arranged along its length direction, blowing along the length of the inner wall of the boiler horizontal pipe (100).

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