On-line ash removal device for boiler
Through the boiler online cleaning device, the combination of screws and scraper rods is used to achieve dust accumulation without shutdown, solving the problem of heat exchange effect affected by the heat area of the tail, improving the boiler operation efficiency and reducing cleaning costs.
Patent Information
- Application Number
- CN202422063459.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The heat transfer effect of the heat receiving surface of the tail of the existing boiler is reduced due to the accumulation of dust, and removing the accumulated dust requires shutdown operation, which increases costs and inconvenience.
A boiler online dust cleaning device is designed, and the moving seat and cleaning plate are driven by a screw to move the slag scraper and rotate the slag scraper to remove the heated ash at the tail without shutting down. The dust accumulation is scraped off and discharged through the slag discharge port.
It realizes automatic removal of the heated area ash at the tail during the boiler operation, improves heat exchange efficiency, reduces the need for shutdown and cleansing, and reduces labor and equipment costs.
Smart Images
Figure CN223243441U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to an online boiler dust cleaning device. Background Art
[0002] The heating surface at the rear of the boiler (air preheater) absorbs the heat of the tail flue gas and preheats the boiler air at the same time, which plays an important role in lowering the exhaust gas temperature, reducing exhaust gas heat loss and improving the thermal efficiency of the boiler.
[0003] Because coal-fired boilers contain ash in their flue gas, the flue gas velocity decreases as it flows through the rear air preheater, causing some ash particles to be adsorbed and deposited on the heating surface, forming ash deposits. Because ash deposits have a low thermal conductivity, a thick ash layer can significantly affect heat transfer and flue gas circulation, reducing the boiler's heat transfer efficiency and even blocking the flue gas passages, forcing a shutdown. Existing methods for preventing or cleaning ash from heating surfaces often involve manual periodic cleaning during boiler shutdown, compressed air blowing, or sonic blowing. Manual cleaning costs and equipment are high, and online and timely cleaning is not possible.
[0004] Therefore, the problem that there is a large amount of dust accumulated in the heating surface section of the above-mentioned boiler, which is difficult to remove and requires shutdown for cleaning, needs to be solved urgently. Utility Model Content
[0005] In order to overcome the problem that when the flue gas flows through the heating surface at the rear of the boiler, the flue gas flow rate is reduced, and the ash particles in the flue gas will be adsorbed and deposited on the heating surface to form ash accumulation. The ash accumulation layer affects the heat exchange effect of the boiler heating surface, and the boiler needs to be shut down for cleaning.
[0006] The technical solution of the utility model is: a boiler online dust cleaning device, including a boiler body, the right side of the boiler body is connected to an air preheater through a pipeline, the right side surface of the air preheater is installed with a tail heating surface, the right side of the bottom surface of the tail heating surface is provided with mutually symmetrical slag discharge ports, fixed plates are provided at the middle positions of the left and right sides of the tail heating surface, a screw is provided between the two fixed plates, the outer surface of the screw is provided with a movable seat, the right side surface of the movable seat is provided with a cleaning plate, and the outer surface of the cleaning plate is provided with a scraping rod.
[0007] Preferably, a screw is provided, which drives the movable seat on its surface to move back and forth when it rotates, thereby driving the cleaning disc to move left and right. The rotation of the cleaning disc drives the scraping rod on its surface to rotate, and the dust accumulated on the inner wall of the tail heating surface can be scraped off without stopping the boiler.
[0008] This solves the problem that the flue gas flow rate in the tail heating surface section of the air preheater at the tail of the existing boiler is reduced, and the ash particles in the flue gas will be adsorbed and deposited on the heating surface to form ash accumulation. The ash accumulation layer affects the heat exchange effect of the boiler heating surface, and the ash accumulation layer is difficult to remove and requires shutdown for cleaning.
[0009] Preferably, the outer surfaces of the two fixed plates are welded with mutually symmetrical support rods, and the end of the support rod away from the fixed plate is connected to the inner surface of the tail heating surface. By setting the support rod to install the fixed plate, the windproof area of the fixed structure on both sides of the tail heating surface can be reduced without reducing the steam transmission efficiency.
[0010] Preferably, a first drive motor is installed on the right surface of the right fixed disk, the output end of the first drive motor is fixedly connected to the right end of the screw, and the movable seat is threadedly connected to the screw. Through the operation of the first drive motor, the screw is driven to rotate, thereby driving the movable seat on its surface to move back and forth, thereby achieving the purpose of automatic cleaning and reducing manual intervention.
[0011] Preferably, a slide groove is provided at the bottom of the inner surface of the tail heating surface, and a slide seat is slidably connected inside the slide groove. One end of a connecting rod is installed on the top of the slide seat, and the other end of the connecting rod is connected to the bottom surface of the movable seat. By setting the slide groove, the slide seat can slide inside it. When the movable seat moves, the cooperation between the slide seat and the connecting rod can limit the movable seat to prevent the movable seat from rotating itself, thereby improving the stability of the device operation.
[0012] Preferably, several scraping rods are provided, and the scraping rods are distributed in a circular shape on the outer surface of the cleaning disk. A small gap is left between the tips of the scraping rods and the tail heating surface. By providing the scraping rods, when the scraping rods rotate, their tips will come into contact with the accumulated dust on the surface of the tail heating surface and chisel it into pieces, causing it to fall from the surface of the tail heating surface.
[0013] Preferably, a scraper is installed on the upper surface of the sliding seat, and the bottom surface of the scraper is in contact with the bottom surface of the tail heating surface. A slag collecting plate is provided on the rear side of the upper surface of the scraper. By providing the scraper, when the moving seat moves to the left, the scraper will be lifted up by the accumulated dust at the bottom of the tail heating surface and slide upward along the connecting rod. When the moving seat moves to the right, the slag collecting plate will push the accumulated dust at the bottom of the tail heating surface to the slag discharge port for discharge.
[0014] Preferably, a second drive motor is provided on the front surface of the movable seat, and a bevel gear is fixedly installed on the output end of the second drive motor. A plurality of meshing teeth are provided on the left surface of the cleaning disc, and the bevel gear is engaged with the meshing teeth. The operation of the second drive motor drives the bevel gear to rotate, and the cleaning disc can be driven to rotate in cooperation with the meshing teeth, thereby driving the scraping rod to rotate.
[0015] Beneficial effects of the utility model:
[0016] 1. By setting a screw, the screw will drive the moving seat on its surface to move back and forth when it rotates, thereby driving the cleaning disc to move left and right. The rotation of the cleaning disc will drive the scraping rod on its surface to rotate. Without stopping the boiler, the dust accumulated on the inner wall of the tail heating surface can be scraped off.
[0017] This solves the problem of reduced flue gas velocity in the heating surface section of the air preheater at the rear of the existing boiler, where ash particles in the flue gas are adsorbed and deposited on the heating surface to form ash accumulation. The ash accumulation layer affects the heat exchange effect of the heating surface at the rear of the boiler, and is difficult to remove, requiring shutdown for cleaning.
[0018] 2. By setting up a scraping rod, when the scraping rod rotates, its tip will come into contact with the dust accumulated on the surface of the tail heating surface and chisel it into pieces, causing it to fall from the surface of the tail heating surface. The operation of the second drive motor will drive the bevel gear to rotate, and in cooperation with the meshing teeth, it can drive the cleaning disc to rotate, thereby driving the scraping rod to rotate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Shown is a three-dimensional schematic diagram of a boiler online dust cleaning device of the utility model
[0020] Figure 2 Shown is a three-dimensional schematic diagram of an air preheater of a boiler online ash cleaning device of the present utility model;
[0021] Figure 3 Shown is a three-dimensional schematic diagram of the rear heating surface of a boiler online ash cleaning device of the present utility model;
[0022] Figure 4 Shown is a three-dimensional schematic diagram of a screw of a boiler online ash cleaning device of the present utility model;
[0023] Figure 5 Shown is a three-dimensional schematic diagram of a cleaning disk of a boiler online ash cleaning device of the present invention;
[0024] Figure 6 Shown is a half-section stereoscopic schematic diagram of a movable seat of a boiler online dust cleaning device according to the present invention.
[0025] In the figure: 1. Boiler body; 2. Air preheater; 3. Rear heating surface; 4. Fixed plate; 5. Support rod; 6. First drive motor; 7. Screw; 8. Slag discharge port; 9. Moving seat; 10. Cleaning plate; 11. Slag scraper rod; 12. Chute; 13. Slide seat; 14. Connecting rod; 15. Scraper; 16. Slag collecting plate; 17. Second drive motor; 18. Bevel gear; 19. Meshing teeth. DETAILED DESCRIPTION
[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0027] See also Figure 1-Figure 3 The utility model provides an embodiment: a boiler online dust cleaning device, comprising a boiler body 1, the right side of the boiler body 1 is connected to an air preheater 2 through a pipeline, a tail heating surface 3 is installed on the right side surface of the air preheater 2, and symmetrical slag discharge ports 8 are provided on the right side of the bottom surface of the tail heating surface 3, fixed plates 4 are provided at the middle positions on the left and right sides of the tail heating surface 3, a screw 7 is provided between the two fixed plates 4, a movable seat 9 is provided on the outer surface of the screw 7, a cleaning plate 10 is provided on the right side surface of the movable seat 9, and a scraping rod 11 is provided on the outer surface of the cleaning plate 10.
[0028] See also Figures 1-6 In this embodiment, the outer surfaces of the two fixed disks 4 are welded with mutually symmetrical support rods 5, and the end of the support rod 5 away from the fixed disk 4 is connected to the inner surface of the tail heating surface 3. By setting the support rod 5 to install the fixed disk 4, the windshield area of the fixed structure on both sides of the tail heating surface 3 can be reduced, and the steam transmission efficiency will not be reduced. A first drive motor 6 is installed on the right surface of the right fixed disk 4. The output end of the first drive motor 6 is fixedly connected to the right end of the screw 7, and the movable seat 9 is threadedly connected to the screw 7. The operation of the first drive motor 6 will drive the screw 7 to rotate, thereby driving the movable seat 9 on its surface It moves back and forth to achieve the purpose of online automatic cleaning and ash removal without stopping the boiler, reducing manual intervention. A slide groove 12 is provided at the bottom of the inner surface of the tail heating surface 3. The interior of the slide groove 12 is slidably connected to a slide seat 13. One end of a connecting rod 14 is installed on the top of the slide seat 13, and the other end of the connecting rod 14 is connected to the bottom surface of the moving seat 9. By setting the slide groove 12, the slide seat 13 can slide inside it. When the moving seat 9 moves, the cooperation between the slide seat 13 and the connecting rod 14 can limit the moving seat 9 to prevent the moving seat 9 from rotating itself, thereby improving the stability of the device operation.
[0029] See also Figures 1-6In this embodiment, a plurality of scraper rods 11 are provided, and the plurality of scraper rods 11 are distributed in a circular pattern on the outer surface of the cleaning disc 10. A small gap is left between the tips of the plurality of scraper rods 11 and the tail heating surface 3. By providing the scraper rods 11, when the scraper rods 11 rotate, the tips thereof will contact the accumulated dust on the surface of the tail heating surface 3 and chisel it into pieces, causing it to fall from the surface of the tail heating surface 3. A scraper 15 is installed on the upper surface of the sliding seat 13, and the bottom surface of the scraper 15 is in contact with the bottom surface of the tail heating surface 3. A slag collecting plate 16 is provided on the rear side of the upper surface of the scraper 15. By providing the scraper 15, when the moving seat 9 moves to the left, the scraper 15 will The dust accumulated at the bottom of the tail heating surface 3 is lifted up and slides upward along the connecting rod 14. When the movable seat 9 moves to the right, the slag collecting plate 16 will push the dust accumulated at the bottom of the tail heating surface 3 to the slag discharge port 8 for discharge. The front surface of the movable seat 9 is provided with a second drive motor 17. The output end of the second drive motor 17 is fixedly mounted with a bevel gear 18. The left surface of the cleaning disc 10 is provided with a plurality of meshing teeth 19. The bevel gear 18 is engaged with the meshing teeth 19. The operation of the second drive motor 17 will drive the bevel gear 18 to rotate, and the cleaning disc 10 can be driven to rotate in cooperation with the meshing teeth 19, thereby driving the scraping rod 11 to rotate.
[0030] When working, by setting the support rod 5 to install the fixed plate 4, the windshield area of the fixed structure on both sides of the tail heating surface 3 can be reduced, and the steam transmission efficiency will not be reduced. The operation of the first drive motor 6 will drive the screw 7 to rotate. The outer surface thread of the screw 7 cooperates with the internal screw hole of the movable seat 9, which will drive the movable seat 9 on its surface to move back and forth. The sliding groove 12 is provided, and the sliding seat 13 can slide inside it. When the movable seat 9 moves, the cooperation of the sliding seat 13 and the connecting rod 14 can limit the movable seat 9 to prevent the movable seat 9 from being driven by the screw 7 to rotate, thereby improving the stability of the device operation. Operation, its output end will drive the bevel gear 18 to rotate, and the gear teeth of the bevel gear 18 will mesh with a number of meshing teeth 19, thereby driving the cleaning disc 10 to rotate, so as to achieve the purpose of driving the scraper rod 11 to rotate. When the scraper rod 11 rotates, its tip will contact the dust accumulated on the surface of the tail heating surface 3, and chisel it into pieces, causing it to fall from the surface of the tail heating surface 3, and by providing a scraper 15, when the moving seat 9 moves toward one end of the boiler, the scraper 15 will be lifted up by the dust accumulated at the bottom of the tail heating surface 3 and slide upward along the connecting rod 14. When the moving seat 9 moves to the right, the slag collecting plate 16 will push the dust accumulated at the bottom of the tail heating surface 3 to the slag discharge port 8 for discharge.
[0031] Through the above steps, by setting the screw 7, when the first driving motor 6 drives the screw 7 to rotate, the surface thread of the screw 7 cooperates with the screw hole on the surface of the moving seat 9, which will drive the moving seat 9 on its surface to move back and forth, thereby driving the cleaning disc 10 to move synchronously, and the rotation of the cleaning disc 10 will drive the scraping rod 11 on its surface to rotate, and the dust accumulated on the inner wall of the tail heating surface 3 will be scraped off without stopping the boiler, thereby achieving the effect of online cleaning; thereby solving the problem of the existing boiler
[0032] The flue gas flow rate in the tail heating surface section of the tail air preheater is reduced. When the flue gas flows through the heating surface of the air preheater, the ash particles in the flue gas will be adsorbed and deposited on the heating surface to form ash accumulation. The ash accumulation layer affects the heat exchange effect of the boiler heating surface, and it is difficult to remove the ash accumulation layer.
[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.
Claims
1. A boiler online ash cleaning device, comprising a boiler body (1), characterized in that: The right side of the boiler body (1) is connected to an air preheater (2) through a pipeline. A tail heating surface (3) is installed on the right side surface of the air preheater (2). Mutually symmetrical slag discharge ports (8) are provided on the right side of the bottom surface of the tail heating surface (3). Fixed disks (4) are provided at the middle positions of the left and right sides of the tail heating surface (3). A screw (7) is provided between the two fixed disks (4). A movable seat (9) is provided on the outer surface of the screw (7). A cleaning disk (10) is provided on the right side surface of the movable seat (9). A scraping rod (11) is provided on the outer surface of the cleaning disk (10).
2. The boiler online dust cleaning device according to claim 1, characterized in that: The outer surfaces of the two fixed disks (4) are both welded with mutually symmetrical support rods (5), and one end of the support rod (5) away from the fixed disk (4) is connected to the inner surface of the tail heating surface (3).
3. The boiler online dust cleaning device according to claim 2, characterized in that: A first drive motor (6) is installed on the right side surface of the right fixed disk (4), the output end of the first drive motor (6) is fixedly connected to the right end of the screw rod (7), and the movable seat (9) is threadedly connected to the screw rod (7).
4. The boiler online dust cleaning device according to claim 1, characterized in that: A slide groove (12) is provided at the bottom of the inner surface of the tail heating surface (3), and a slide seat (13) is slidably connected inside the slide groove (12). One end of a connecting rod (14) is installed on the top of the slide seat (13), and the other end of the connecting rod (14) is connected to the bottom surface of the movable seat (9).
5. The boiler online dust cleaning device according to claim 1, characterized in that: A plurality of scraping rods (11) are provided, and the plurality of scraping rods (11) are distributed in a circumferential manner on the outer surface of the cleaning disc (10), and a small gap is left between the tips of the plurality of scraping rods (11) and the tail heating surface (3).
6. The boiler online dust cleaning device according to claim 4, characterized in that: A scraper (15) is installed on the upper surface of the slide seat (13), the bottom surface of the scraper (15) is in contact with the bottom surface of the tail heating surface (3), and a slag collecting plate (16) is provided on the rear side of the upper surface of the scraper (15).
7. The boiler online dust cleaning device according to claim 1, characterized in that: The front side surface of the moving seat (9) is provided with a second driving motor (17), and the output end of the second driving motor (17) A bevel gear (18) is fixedly mounted, and a plurality of meshing teeth (19) are provided on the left side surface of the cleaning disc (10). The bevel gear (18) meshes with the meshing teeth (19).