A boiler water wall anti-abrasion flow guide device for a thermal power plant and a flow guide method thereof

Abstract

The application provides a boiler water cooling wall anti-abrasion flow guide device and a flow guide method thereof, which comprises a water cooling pipe wall, a plurality of rotating components, a plurality of anti-abrasion plates, and an installation component. The plurality of rotating components are arranged on the front surface of the water cooling pipe wall. The plurality of anti-abrasion plates are arranged at the bottom of the plurality of rotating components. The boiler water cooling wall anti-abrasion flow guide device and the flow guide method thereof are characterized in that the water cooling pipe wall, the rotating components, the anti-abrasion plates and the installation component are matched with each other, the rotating components are driven by the weight of the counterweight to make the anti-abrasion plates swing with the smoke flow rate, the spring structure is not needed in the whole process, the problem of high-temperature creep failure does not occur, the anti-abrasion plates can be inclined with the load, the fly ash cannot be accumulated on the plate surface, the local vortex flow cannot wash the pipe wall, the flow guide protection posture can be automatically adjusted with the load, and the problems of high-temperature failure of the spring of the traditional anti-abrasion structure, the accelerated water cooling wall abrasion caused by the ash accumulation on the plate surface and the inability to automatically adjust the flow guide angle are solved.

Description

Technical Field

[0001] This invention relates to the field of protection technology for water-cooled walls of circulating fluidized bed boilers, and particularly to an anti-wear guiding device and its guiding method for water-cooled walls of thermal power plant boilers. Background Technology

[0002] During the combustion process of a circulating fluidized bed power plant boiler, the combustion of raw coal produces a large amount of high-hardness fly ash particles. These particles are carried by high-temperature flue gas and scour the outer wall of the water-cooled wall tubes at high speed. Long-term erosion will cause the tube wall to thin, perforate and leak, leading to unplanned shutdowns of the unit. Therefore, the anti-wear guiding structure of the water-cooled wall is a core protective component for the long-term stable operation of the boiler.

[0003] For example, the prior art patent application with publication number CN215294992U includes: a boiler outer wall, multiple water-cooled pipes, multiple reinforcing connectors, and several speed-reducing guide plates; the multiple water-cooled pipes are evenly distributed on the boiler outer wall; the reinforcing connectors are spaced apart from the water-cooled pipes and are fixedly connected to the water-cooled pipes, with a pair of adjacent reinforcing connectors forming a group; the speed-reducing guide plates are correspondingly arranged with a group of reinforcing connectors and are connected to the reinforcing connectors. This utility model, through the setting of corresponding mechanisms on the water-cooled wall of the circulating fluidized bed boiler, provides a buffer space for the speed-reducing guide plates when encountering larger particles, reducing the hard impact of larger particles on the speed-reducing guide plates, thereby ensuring the service life of the speed-reducing guide plates, reducing the frequency of maintenance by users, ensuring the normal production efficiency of the circulating fluidized bed boiler, and thus ensuring the user's production income.

[0004] However, the boiler furnace is in a high-temperature environment of over 800℃ for a long time. The metal springs are prone to high-temperature creep and elastic decay failure due to continuous heating, and the buffering and regulating capacity is quickly lost. At the same time, the anti-wear plate of this solution is a horizontal fixed structure, and fly ash and coke residue are easy to accumulate on the plate surface. The accumulated ash layer will change the local flue gas flow field and form eddies to intensify local scouring.

[0005] Therefore, it is necessary to provide a wear-resistant flow guiding device and flow guiding method for water-cooled walls of thermal power plant boilers to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a water-cooled wall anti-wear guiding device and its guiding method for thermal power plant boilers, which solves the problems of existing water-cooled anti-wear structures relying on spring buffers which are prone to high-temperature failure, the anti-wear plates fixed with ash accumulation forming eddies that aggravate pipe wall wear, and the inability to adaptively adjust the guiding angle according to the load.

[0007] To solve the above-mentioned technical problems, the present invention provides a wear-resistant flow guiding device for water-cooled walls of thermal power plant boilers, comprising:

[0008] Water-cooled pipe walls;

[0009] Multiple rotating components, all of which are disposed on the front side of the water-cooled pipe wall;

[0010] Multiple wear-resistant plates are respectively disposed at the bottom of the multiple rotating components;

[0011] Multiple mounting components are respectively disposed between multiple rotating components and multiple wear-resistant plates.

[0012] Preferably, the rotating assembly includes a rotating base, a rotating shaft is rotatably connected to the inner side of the rotating base, a rotating plate is fixedly installed on the outer side of the rotating shaft, and a counterweight is provided at one end of the bottom of the rotating plate.

[0013] Preferably, a first limiting block is fixedly installed on the side of the rotating seat, and a second limiting block is provided on the side of the first limiting block, and the second limiting block is fixedly installed at one end of the top of the rotating shaft.

[0014] Preferably, the mounting assembly includes a square groove, which is formed on the top of the wear-resistant plate. A square block is provided on the inner side of the square groove. The square block is fixedly installed on one end of the rotating plate. An insertion groove is formed at the bottom of the square groove. A threaded rod is fixedly installed at the bottom of the square block. The threaded rod is inserted into the inner side of the insertion groove. A nut is threadedly connected to the outer side of the threaded rod. The nut abuts against the bottom of the wear-resistant plate.

[0015] Preferably, a limit component is provided on the top of the counterweight.

[0016] Preferably, the limiting component includes a mounting groove, which is opened inside one end of the rotating plate. A mounting block is provided on the inner side of the mounting groove. The mounting block is fixedly installed on the top of the counterweight block, and a limiting plate is fixedly installed on the top of the mounting block.

[0017] Preferably, the limiting plate abuts against the top of the rotating plate.

[0018] Preferably, a limit component is provided between the water-cooled wall tube and the rotating assembly.

[0019] Preferably, the limiting component includes a snap-fit ​​frame, which is fixedly installed on the front side of the water-cooled wall tube, and a snap-fit ​​plate is snapped onto the inner side of the snap-fit ​​frame, which is fixedly installed on the back side of the rotating seat.

[0020] To address the above problems, the present invention also provides a flow guiding method for the anti-wear flow guiding device for the water-cooled wall of a thermal power plant boiler as described in any of the above claims, comprising the following steps:

[0021] S1. Pre-installation positioning: Weld and fix the snap-fit ​​frames in batches to the preset installation positions on the front of the water-cooled wall tubes, and align the snap-fit ​​plates on the back of the rotating components with the snap-fit ​​frames to complete the snap-fit, so as to quickly pre-fix all rotating components on the water-cooled wall tubes.

[0022] S2. Anti-wear plate assembly: Take the anti-wear plate, insert the square block at the bottom of the rotating plate into the square groove at the top of the anti-wear plate, so that the threaded rod at the bottom of the square block passes through the insertion groove, tighten the nut at the bottom of the threaded rod, and lock the anti-wear plate and the rotating plate together.

[0023] S3. Counterweight limiting assembly: The top mounting block of the counterweight is embedded into the mounting groove at the end of the rotating plate, so that the limiting plate is pressed against the upper surface of the rotating plate to complete the counterweight limiting and fixing; the maximum rotation angle of the rotating plate is limited by the relative position of the first limiting block and the second limiting block.

[0024] S4. Boiler no-load commissioning: During the ventilation stage before the boiler is ignited, introduce primary and secondary air. Relying on the interaction between the weight of the counterweight and the impact force of the flue gas flow, the rotating plate drives the anti-wear plate to swing adaptively around the rotating axis. Observe the swing range of the anti-wear plate.

[0025] S5. Unit Adaptive Flow Guiding Operation under Load: When the boiler is in normal combustion operation, the flue gas carries fly ash to scour the water-cooled wall area. The wear-resistant plates automatically rotate with the flue gas velocity and load changes, changing the local flue gas flow direction and preventing high-concentration fly ash from directly impacting the water-cooled wall tubes. When the unit is under low load and the flue gas velocity decreases, the counterweight pulls the rotating plate upward to increase the wear-resistant shielding area. When the flue gas velocity is high, the airflow pushes the wear-resistant plates downward to tilt, which plays a buffering role and reduces the scouring and wear of the tube walls.

[0026] Compared with related technologies, the anti-wear guiding device and guiding method for water-cooled walls of thermal power plant boilers provided by the present invention have the following beneficial effects:

[0027] This invention provides a wear-resistant and flow-guiding device and method for water-cooled walls in thermal power plant boilers. The device utilizes a combination of water-cooled wall tubes, a rotating assembly, a wear-resistant plate, and an installation assembly. The rotating assembly, driven by its own weight, causes the wear-resistant plate to adaptively swing with the flue gas velocity. No spring structure is required throughout the process, eliminating the risk of high-temperature creep failure. Furthermore, the wear-resistant plate can tilt with the load, preventing fly ash accumulation on the plate surface and avoiding the formation of localized eddies that scour the tube wall. It can automatically adjust its flow-guiding and protective posture according to the load, solving the problems of high-temperature spring failure, increased wear due to fly ash accumulation on the plate, and the inability to adaptively adjust the flow-guiding angle in traditional wear-resistant structures. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first embodiment of a wear-resistant flow guiding device for a water-cooled wall in a thermal power plant boiler, provided by the present invention.

[0029] Figure 2 for Figure 1 The diagram shows the rotating assembly and the wear-resistant plate structure.

[0030] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the rotating plate and the wear-resistant plate.

[0031] Figure 4 for Figure 2 The diagram shows the structure of the rotating plate and counterweight.

[0032] Figure 5 This is a schematic diagram of the second embodiment of the anti-wear guiding device for water-cooled walls of thermal power plant boilers provided by the present invention;

[0033] Figure 6 This is a schematic diagram of the third embodiment of the anti-wear guiding device for water-cooled walls of thermal power plant boilers provided by the present invention;

[0034] Figure 7 for Figure 6 The enlarged schematic diagram of part A is shown.

[0035] The following are the labels in the diagram: 1. Water-cooled wall tube, 2. Rotating assembly, 21. Rotating seat, 22. Rotating shaft, 23. Rotating plate, 24. Counterweight block, 25. First limit block, 26. Second limit block, 3. Wear-resistant plate, 4. Mounting assembly, 41. Square groove, 42. Square block, 43. Insertion groove, 44. Threaded rod, 45. Nut, 5. Limiting assembly, 51. Mounting groove, 52. Mounting block, 53. Limiting plate, 6. Limiting assembly, 61. Snap-fit ​​frame, 62. Snap-fit ​​plate. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] First Embodiment

[0038] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 This is a schematic diagram of the first embodiment of a wear-resistant flow guiding device for a water-cooled wall in a thermal power plant boiler, provided by the present invention. Figure 2 for Figure 1 The diagram shows the rotating assembly and the wear-resistant plate structure. Figure 3 for Figure 2 The diagram shows a cross-sectional view of the rotating plate and the wear-resistant plate. Figure 4 for Figure 2 The diagram shows the structure of the rotating plate and counterweight.

[0039] A wear-resistant and flow-guiding device for water-cooled walls of a thermal power plant boiler includes: a water-cooled tube wall 1;

[0040] Multiple rotating components 2 are provided on the front side of the water-cooled pipe wall 1;

[0041] Multiple wear-resistant plates 3 are respectively disposed at the bottom of the multiple rotating components 2;

[0042] Multiple mounting components 4 are respectively disposed between multiple rotating components 2 and multiple anti-wear plates 3.

[0043] The rotating assembly 2 includes a rotating seat 21, a rotating shaft 22 is rotatably connected to the inner side of the rotating seat 21, a rotating plate 23 is fixedly installed on the outer side of the rotating shaft 22, and a counterweight 24 is provided at one end of the bottom of the rotating plate 23.

[0044] The rotating seat 21, rotating shaft 22, and rotating plate 23 are all made of heat-resistant Cr-Mo alloy steel, which can withstand the long-term high temperature of 850℃ in the furnace. The rotating shaft 22 and the rotating plate 23 are fully welded together without gaps. The reset is achieved by the weight of the counterweight 24. No metal springs are used throughout the process, which completely solves the problem of high-temperature creep failure.

[0045] A first limiting block 25 is fixedly installed on the side of the rotating seat 21, and a second limiting block 26 is provided on the side of the first limiting block 25. The second limiting block 26 is fixedly installed on one end of the top of the rotating shaft 22.

[0046] The first limiting block 25 is welded to the side wall of the rotating seat 21, and the second limiting block 26 rotates synchronously with the rotating shaft 22. The two work together to limit the maximum up and down rotation angle of the rotating shaft 22, preventing the wear plate 3 from being raised or pressed down excessively, and ensuring that the posture of effectively shielding the water-cooled wall tube 1 is always maintained.

[0047] The mounting assembly 4 includes a square groove 41, which is formed on the top of the wear-resistant plate 3. A square block 42 is provided on the inner side of the square groove 41. The square block 43 is fixedly installed on one end of the rotating plate 23. A plug-in groove 43 is formed at the bottom of the square groove 41. A threaded rod 44 is fixedly installed at the bottom of the square block 42. The threaded rod 44 is inserted into the inner side of the plug-in groove 43. A nut 45 is threadedly connected to the outer side of the threaded rod 44. The nut 45 abuts against the bottom of the wear-resistant plate 3.

[0048] After the square block 42 is embedded in the square groove 41, it restricts the circumferential rotation of the anti-wear plate 3. The threaded rod 44 passes downward through the insertion groove 43, and the bottom nut 45 is locked to complete the assembly. After the anti-wear plate 3 is worn by fly ash for a long time, it can be replaced by simply loosening the bottom nut 45. There is no need to disassemble the upper rotating mechanism, making maintenance convenient.

[0049] The working principle of the anti-wear and flow guiding device for water-cooled walls of thermal power plant boilers provided by this invention is as follows:

[0050] When the boiler is running, the high-temperature flue gas carries hard fly ash and washes over the water-cooled wall area. The airflow impacts the wear-resistant plate 3, generating a downward thrust. Under low-load conditions, the flue gas velocity is low, and the airflow thrust is less than the weight of the counterweight 24. The counterweight pulls the rotating plate 23 to rotate upward around the shaft 22, raising the wear-resistant plate 3 and increasing the shielding area of ​​the water-cooled wall tubes, preventing low-speed fly ash from continuously impacting the tube wall. Under high-load conditions, the flue gas velocity increases significantly, and the airflow thrust overcomes the weight of the counterweight and presses down on the wear-resistant plate 3. The plate surface tilts, and the fly ash slides along the plate surface, preventing it from accumulating and forming an ash layer, thus avoiding ash accumulation that induces local eddy currents. The first limiting block 25 and the second limiting block 26 limit the maximum swing stroke of the shaft, preventing the wear-resistant plate 3 from completely rotating and losing its protective function.

[0051] Compared with related technologies, the anti-wear guiding device for water-cooled walls of thermal power plant boilers provided by the present invention has the following beneficial effects:

[0052] The water-cooled wall tube 1, rotating assembly 2, wear-resistant plate 3, and mounting assembly 4 work together to drive the rotating assembly 2 to move the wear-resistant plate 3 to swing adaptively with the flue gas velocity, relying on the counterweight to drive the rotating assembly 2. No spring structure is required throughout the process, so there will be no high-temperature creep failure problem. At the same time, the wear-resistant plate 3 can tilt with the load, so fly ash cannot accumulate on the plate surface and will not form local eddies to scour the tube wall. It can automatically adjust the flow guiding and protection posture according to the load, solving the problems of high-temperature failure of springs in traditional wear-resistant structures, increased wear of water-cooled walls due to fly ash accumulation on the plate, and inability to adaptively adjust the flow guiding angle.

[0053] Second Embodiment

[0054] Please refer to the following: Figure 5 Based on the first embodiment of this application providing a wear-resistant flow guiding device for the water-cooled wall of a thermal power plant boiler, the second embodiment of this application proposes another wear-resistant flow guiding device for the water-cooled wall of a thermal power plant boiler. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0055] Specifically, the difference in the second embodiment of this application regarding the anti-wear guiding device for water-cooled walls of thermal power plant boilers is that the counterweight 24 is provided with a limit component 5 on its top.

[0056] The limiting component 5 includes a mounting groove 51, which is opened inside one end of the rotating plate 23. A mounting block 52 is provided on the inner side of the mounting groove 51. The mounting block 52 is fixedly installed on the top of the counterweight block 24. A limiting plate 53 is fixedly installed on the top of the mounting block 52.

[0057] The mounting slot 51 is vertically opened at the end of the rotating plate 23. The mounting block 52 and the counterweight block 24 are integrally formed. After being vertically inserted into the mounting slot 51, the limiting plate 53 is stuck on the upper surface of the rotating plate 23, preventing the counterweight block 24 from falling downward. There is no threaded connection, so it will not rust or jam at high temperatures.

[0058] The limiting plate 53 abuts against the top of the rotating plate 23.

[0059] The limiting plate 53 is completely in contact with the top surface of the rotating plate 23. When the flue gas flows horizontally, the counterweight 24 will not move up and down. The counterweight torque is stable, the swing angle of the anti-wear plate 3 is controllable, and the flow guidance and protection effect is stable.

[0060] The working principle of the anti-wear and flow guiding device for water-cooled walls of thermal power plant boilers provided by this invention is as follows:

[0061] When disassembling and assembling the counterweight 24, simply pull the counterweight 24 upwards and pull the mounting block 52 out of the mounting groove 51 to complete the disassembly. When replacing the counterweight 24, insert the mounting block 52 into the mounting groove 51, and the limiting plate 53 will automatically fit against the top surface of the rotating plate 23 to complete the limiting and fixing. No bolts are required for tightening, and the counterweight components can be quickly replaced when the furnace is shut down.

[0062] Compared with related technologies, the anti-wear guiding device for water-cooled walls of thermal power plant boilers provided by the present invention has the following beneficial effects:

[0063] The mounting slot 51, mounting block 52 and limiting plate 53 cooperate with each other. The mounting block 52 can be directly inserted into the mounting slot 51 to complete the assembly of the counterweight block 24. The limiting plate 53 fits against the top surface of the rotating plate 23 to restrict the counterweight block 24 from moving up and down. No threaded fasteners are required. There will be no rust or jamming under high temperature conditions. The counterweight block 24 can be quickly disassembled and replaced during furnace shutdown and maintenance to ensure stable counterweight torque and keep the wear-resistant plate 3 self-adaptive flow guidance and wear-resistant effect stable for a long time.

[0064] Third Embodiment

[0065] Please refer to the following: Figure 6 and Figure 7 Based on the first embodiment of this application, which provides a wear-resistant flow guiding device for the water-cooled wall of a thermal power plant boiler, the third embodiment of this application proposes another wear-resistant flow guiding device for the water-cooled wall of a thermal power plant boiler. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0066] Specifically, the difference in the third embodiment of this application regarding the anti-wear guiding device for water-cooled walls of thermal power plant boilers is that a limit component 6 is provided between the water-cooled wall tube 1 and the rotating component 2.

[0067] The limiting component 6 includes a snap-fit ​​frame 61, which is fixedly installed on the front side of the water-cooled wall tube 1. A snap-fit ​​plate 62 is snapped onto the inner side of the snap-fit ​​frame 61, and the snap-fit ​​plate 62 is fixedly installed on the back side of the rotating seat 21.

[0068] The working principle of the anti-wear and flow guiding device for water-cooled walls of thermal power plant boilers provided by this invention is as follows:

[0069] During the equipment pre-installation stage, the snap-fit ​​frames 61 are pre-welded to the water-cooled wall protection points in batches. When installing on site, the back snap-fit ​​plate 62 is aligned with the snap-fit ​​frame 61 by hand rotating component 2 and inserted from top to bottom to quickly fix the entire device. When removing it, it can be removed by pulling it upwards, making the modification and construction convenient.

[0070] Compared with related technologies, the anti-wear guiding device for water-cooled walls of thermal power plant boilers provided by the present invention has the following beneficial effects:

[0071] The snap-fit ​​frame 61 and snap-fit ​​plate 62 cooperate with each other. The snap-fit ​​frame 61 is pre-welded to the surface of the water-cooled wall tube 1, and the snap-fit ​​plate 62 can be directly snapped into the snap-fit ​​frame 61 to complete the quick pre-installation and fixation of the entire rotating assembly 2. No on-site welding fastening device is required. The boiler modification and equipment addition construction operation is simple, shortening the on-site installation time. During maintenance, the entire anti-wear guide structure can be removed by lifting upwards, making disassembly and maintenance convenient.

[0072] To address the above problems, the present invention also provides a flow guiding method for the anti-wear flow guiding device for the water-cooled wall of a thermal power plant boiler as described in any of the above claims, comprising the following steps:

[0073] S1. Pre-installation positioning: Weld and fix the snap-fit ​​frame 61 in batches to the preset installation position on the front of the water-cooled wall tube 1, and align the snap-fit ​​plate 62 on the back of the rotating component 2 with the snap-fit ​​frame 61 to complete the snap-fit, so as to quickly pre-fix all rotating components 2 on the water-cooled wall tube 1.

[0074] S2. Assembly of anti-wear plate 3: Take anti-wear plate 3, insert the square block 42 at the bottom of the rotating plate 23 into the square groove 41 at the top of the anti-wear plate 3, so that the threaded rod 44 at the bottom of the square block 42 passes through the insertion groove 43, tighten the nut 45 at the bottom of the threaded rod 44, and lock the anti-wear plate 3 and the rotating plate 23 together.

[0075] S3. Counterweight limiting assembly: The top mounting block 52 of the counterweight block 24 is embedded into the mounting groove 51 at the end of the rotating plate 23, so that the limiting plate 53 is pressed against the upper surface of the rotating plate 23, thus completing the limiting and fixing of the counterweight block 24; the maximum rotation angle of the rotating plate 23 is limited by the relative position of the first limiting block 25 and the second limiting block 26.

[0076] S4. Boiler no-load commissioning: During the ventilation stage before the boiler is ignited, primary air and secondary air are introduced. Relying on the interaction between the gravity of the counterweight 24 and the impact force of the flue gas flow, the rotating plate 23 drives the anti-wear plate 3 to swing adaptively around the rotating shaft 22. Observe the swing range of the anti-wear plate 3.

[0077] S5. Unit Load Adaptive Flow Guiding Operation: When the boiler is in normal combustion operation, the flue gas carries fly ash to scour the water-cooled wall area. The wear plate 3 automatically flips with the flue gas velocity and load changes, changing the local flue gas flow direction and blocking high-concentration fly ash from directly impacting the water-cooled wall tube 1. When the unit is under low load and the flue gas velocity decreases, the counterweight 24 pulls the rotating plate 23 upward to increase the wear-resistant shielding area. When the flue gas velocity is high, the airflow pushes the wear plate 3 downward to tilt, which plays a buffering role and reduces the scouring and wear of the tube wall.

[0078] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A wear-resistant flow guiding device for water-cooled walls of a thermal power plant boiler, characterized in that, include: Water-cooled pipe walls; Multiple rotating components, all of which are disposed on the front side of the water-cooled pipe wall; Multiple wear-resistant plates are respectively disposed at the bottom of the multiple rotating components; Multiple mounting components are respectively disposed between multiple rotating components and multiple wear-resistant plates.

2. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 1, characterized in that, The rotating assembly includes a rotating base, a rotating shaft is rotatably connected to the inner side of the rotating base, a rotating plate is fixedly installed on the outer side of the rotating shaft, and a counterweight is provided at one end of the bottom of the rotating plate.

3. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 2, characterized in that, A first limiting block is fixedly installed on the side of the rotating seat, and a second limiting block is provided on the side of the first limiting block. The second limiting block is fixedly installed at one end of the top of the rotating shaft.

4. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 3, characterized in that, The mounting assembly includes a square groove, which is formed on the top of the wear-resistant plate. A square block is provided on the inner side of the square groove. The square block is fixedly installed on one end of the rotating plate. A plug-in groove is formed at the bottom of the square groove. A threaded rod is fixedly installed on the bottom of the square block. The threaded rod is plugged into the inner side of the plug-in groove. A nut is threadedly connected to the outer side of the threaded rod. The nut abuts against the bottom of the wear-resistant plate.

5. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 4, characterized in that, A limit component is provided on the top of the counterweight.

6. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 5, characterized in that, The limiting component includes a mounting groove, which is opened inside one end of the rotating plate. A mounting block is provided on the inner side of the mounting groove. The mounting block is fixedly installed on the top of the counterweight block. A limiting plate is fixedly installed on the top of the mounting block.

7. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 6, characterized in that, The limiting plate abuts against the top of the rotating plate.

8. The anti-wear guiding device for water-cooled walls of thermal power plant boilers according to claim 7, characterized in that, A limit component is provided between the water-cooled wall tube and the rotating assembly.

9. A wear-resistant flow guiding device for water-cooled walls of a thermal power plant boiler according to claim 8, characterized in that, The limiting component includes a snap-fit ​​frame, which is fixedly installed on the front side of the water-cooled wall tube. A snap-fit ​​plate is snapped onto the inner side of the snap-fit ​​frame, and the snap-fit ​​plate is fixedly installed on the back side of the rotating seat.

10. A flow guiding method for the anti-wear flow guiding device of the water-cooled wall of a thermal power plant boiler as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Pre-installation positioning: Weld and fix the snap-fit ​​frames in batches to the preset installation positions on the front of the water-cooled wall tubes, and align the snap-fit ​​plates on the back of the rotating components with the snap-fit ​​frames to complete the snap-fit, so as to quickly pre-fix all rotating components on the water-cooled wall tubes. S2. Anti-wear plate assembly: Take the anti-wear plate, insert the square block at the bottom of the rotating plate into the square groove at the top of the anti-wear plate, so that the threaded rod at the bottom of the square block passes through the insertion groove, tighten the nut at the bottom of the threaded rod, and lock the anti-wear plate and the rotating plate together. S3. Counterweight limiting assembly: The top mounting block of the counterweight is embedded into the mounting groove at the end of the rotating plate, so that the limiting plate is pressed against the upper surface of the rotating plate to complete the counterweight limiting and fixing; the maximum rotation angle of the rotating plate is limited by the relative position of the first limiting block and the second limiting block. S4. Boiler no-load commissioning: During the ventilation stage before the boiler is ignited, introduce primary and secondary air. Relying on the interaction between the weight of the counterweight and the impact force of the flue gas flow, the rotating plate drives the anti-wear plate to swing adaptively around the rotating axis. Observe the swing range of the anti-wear plate. S5. Unit Adaptive Flow Guiding Operation under Load: When the boiler is in normal combustion operation, the flue gas carries fly ash to scour the water-cooled wall area. The wear-resistant plates automatically rotate with the flue gas velocity and load changes, changing the local flue gas flow direction and preventing high-concentration fly ash from directly impacting the water-cooled wall tubes. When the unit is under low load and the flue gas velocity decreases, the counterweight pulls the rotating plate upward to increase the wear-resistant shielding area. When the flue gas velocity is high, the airflow pushes the wear-resistant plates downward to tilt, which plays a buffering role and reduces the scouring and wear of the tube walls.

Images