Anti-blocking device for ash conveying pipeline of circulating fluidized bed boiler
By installing anti-blocking mechanisms and secondary anti-blocking mechanisms in the ash conveying pipeline of the circulating fluidized bed boiler, and utilizing crushing blades and high-pressure gas impact, the ash conveying pipeline blockage problem was solved, achieving smooth ash conveying and clean pipeline maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-10
AI Technical Summary
During operation, large particles and clumps in the ash of a circulating fluidized bed boiler can easily cause blockages in the ash conveying pipes, and these particles gradually accumulate on the pipe walls, leading to a reduction in the flow area and further blockages.
The design incorporates a blockage prevention mechanism and a secondary blockage prevention mechanism. It utilizes a motor-driven rotating shaft, bevel gears, and crushing blades to break up large particles, while the vibration of rubber impact blocks removes adhering ash. High-pressure gas impact is used to prevent accumulation and ensure the normal flow of ash.
It effectively prevents blockage of ash conveying pipelines, maintains normal ash flow, reduces the risk of blockage, and ensures smooth ash conveying process and clean pipeline inner walls.
Smart Images
Figure CN224108188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler ash conveying pipe technology, and more specifically, to an anti-clogging device for ash conveying pipes in circulating fluidized bed boilers. Background Technology
[0002] Circulating fluidized bed boilers are widely used in many fields such as power, chemical industry, and heating due to their advantages such as high efficiency and environmental protection. During their operation, they generate a large amount of ash, which needs to be discharged in a timely manner through ash conveying pipelines.
[0003] The ash discharged from the boiler is complex in nature, often containing large particles and clumps formed due to incomplete combustion or other reasons. Once these large particles enter the ash conveying pipe, they can easily cause blockage inside the pipe, hindering the normal transport of ash. At the same time, during the ash conveying process, some ash will gradually adhere to the inner wall of the ash conveying pipe. Over time, these adhered ash particles will continue to accumulate and thicken, which will not only reduce the effective flow cross-sectional area of the pipe and reduce the ash flow rate, but also further aggravate the accumulation of ash, eventually causing pipe blockage. Utility Model Content
[0004] In order to overcome the problems and defects in the prior art, this utility model provides an anti-clogging device for the ash conveying pipeline of a circulating fluidized bed boiler, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-clogging device for the ash conveying pipeline of a circulating fluidized bed boiler, including a boiler ash conveying pipe, wherein an anti-clogging mechanism is provided at one end of the boiler ash conveying pipe, and a secondary anti-clogging mechanism is provided at the top of the boiler ash conveying pipe;
[0006] The anti-clogging mechanism includes an inlet pipe, which is fixedly connected to one end of the boiler ash conveying pipe. A fixing plate is fixedly connected to the top of the inlet pipe, and a first motor is fixedly installed on one side of the fixing plate. A rotating shaft is fixedly connected to the output end of the first motor. A fixing box is provided inside the inlet pipe, and a first bevel gear is fixedly connected to the bottom end of the rotating shaft. Second bevel gears are meshed on both sides of the first bevel gear. A rotating rod is fixedly connected inside the second bevel gear, and a crushing blade is fixedly connected to the outside of the rotating rod.
[0007] Preferably, the secondary anti-clogging mechanism includes a fixed shell, which is fixed to the top of the boiler ash conveying pipe, and a second motor is fixedly installed on one side of the fixed shell.
[0008] Preferably, a rotating shaft is fixedly connected to the output end of the second motor, the rotating shaft is rotatably connected to the fixed shell, a rotating roller is fixedly sleeved on the outside of the rotating shaft, and a rubber impact block is fixedly connected to the outside of the rotating roller.
[0009] Preferably, a compressed air tank is installed on the top of the boiler ash conveying pipe near one side of the fixed shell, a high-pressure gas pump is fixedly installed inside the compressed air tank, and an exhaust pipe is fixedly connected to the bottom of the high-pressure gas pump.
[0010] Preferably, the exhaust pipe is in the shape of L in cross section.
[0011] Preferably, the rotating shaft penetrates the inlet pipe and the fixed box in sequence and extends into the fixed box, and the rotating shaft and the rotating rod are rotationally connected with the fixed box.
[0012] Preferably, fixed rods are fixedly connected between the fixed box and the inlet pipe on both sides.
[0013] Preferably, the plurality of crushing blades are distributed in the axial and circumferential directions of the rotating rod in a staggered manner.
[0014] The technical effects and advantages of the present application are as follows:
[0015] By setting the prevention blocking mechanism and the secondary prevention blocking mechanism, the first motor drives the rotating shaft, the first bevel gear, the second bevel gear and the rotating rod, so that the crushing blades crush the large particles or agglomerated substances in the ash, thereby reducing the large size substances that may cause blockage from entering the ash conveying pipe, reducing the risk of pipe blockage, ensuring the initial smoothness of the ash conveying process, the second motor drives the rotating shaft, the rotating roller and the rubber impact block to rotate, and the vibration generated by the rubber impact block impacting the top of the boiler ash conveying pipe can loosen the ash attached to the pipe wall, effectively avoiding the long-term accumulation of ash on the pipe wall, keeping the inner wall of the pipe clean, ensuring the normal flow of ash in the pipe, and further preventing blockage.
[0016] The high-pressure gas pump in the compressed air tank discharges high-pressure gas, which is sprayed into the boiler ash conveying pipe through the exhaust pipe, forms an impact on the ash, can push the ash to flow in the pipe, prevents the ash from accumulating and blocking in the pipe due to slow flow rate or other reasons, further improves the anti-blocking effect, and can quickly dredge the blocked area, and comprehensively improves the anti-blocking ability of the ash conveying pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.
[0018] Figure 2 It is a schematic diagram of the side view structure of the present application.
[0019] Figure 3 It is a schematic diagram of the local front cross-sectional structure of the present application.
[0020] Figure 4 It is a schematic diagram of the structure of the inlet pipe of the present application.
[0021] Figure 5 The utility model discloses a Figure 4 Front view structure schematic diagram.
[0022] The figure mark is: 1, boiler ash conveying pipe, 2, import pipe, 3, fixed plate, 4, first motor, 5, rotating shaft, 6, fixed box, 7, first bevel gear, 8, second bevel gear, 9, rotating rod, 10, broken blade, 11, fixed shell, 12, second motor, 13, rotating shaft, 14, rotating roller, 15, rubber impact block, 16, compressed air tank, 17, high pressure gas pump, 18, exhaust pipe, 19, fixed rod. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0024] As shown in the accompanying Figures 1-5 The prevention device of the circulating fluidized bed boiler ash conveying pipeline comprises a boiler ash conveying pipe 1, a prevention blocking mechanism is arranged at one end of the boiler ash conveying pipe 1, and a secondary prevention blocking mechanism is arranged at the top of the boiler ash conveying pipe 1.
[0025] The prevention blocking mechanism comprises an import pipe 2, the import pipe 2 is fixedly connected to one end of the boiler ash conveying pipe 1, a fixed plate 3 is fixedly connected to the top of the import pipe 2, a first motor 4 is fixedly installed on one side of the fixed plate 3, a rotating shaft 5 is fixedly connected to the output end of the first motor 4, a fixed box 6 is arranged in the import pipe 2, a first bevel gear 7 is fixedly connected to the bottom end of the rotating shaft 5, second bevel gears 8 are engaged on the two sides of the first bevel gear 7, a rotating rod 9 is fixedly connected to the inside of the second bevel gear 8, and broken blades 10 are fixedly connected to the outside of the rotating rod 9.
[0026] As shown in the accompanying Figures 1-3 The secondary prevention blocking mechanism comprises a fixed shell 11, the fixed shell 11 is fixed to the top of the boiler ash conveying pipe 1, a second motor 12 is fixedly installed on one side of the fixed shell 11, a rotating shaft 13 is fixedly connected to the output end of the second motor 12, the rotating shaft 13 is rotatably connected with the fixed shell 11, a rotating roller 14 is fixedly sleeved on the outside of the rotating shaft 13, a rubber impact block 15 is fixedly connected to the outside of the rotating roller 14, the boiler ash conveying pipe 1 is conveniently impacted, so that the dust is prevented from being long-termly bonded to the inner wall of the boiler ash conveying pipe 1 to cause blocking.
[0027] As shown in the accompanying Figures 1-3As shown, the boiler ash conveying pipe 1 top near the fixed shell 11 side is provided with a compressed air tank 16, the compressed air tank 16 is fixedly provided with a high-pressure air pump 17, the high-pressure air pump 17 bottom is fixedly connected with an exhaust pipe 18, the exhaust pipe 18 bottom penetrates the boiler ash conveying pipe 1 and extends to the boiler ash conveying pipe 1, the exhaust pipe 18 cross section is provided with L shape, which is convenient to clear the blocked position by high-pressure air.
[0028] As shown in the accompanying drawings Figure 4 、 5 The rotating shaft 5 penetrates the inlet pipe 2 and the fixed box 6 in sequence and extends to the inside of the fixed box 6, and the rotating shaft 5 and the rotating rod 9 are rotatably connected with the fixed box 6, so that the rotating shaft 5 and the rotating rod 9 can rotate, thereby driving the rotating rod 9 outside the rotating blade 10 to rotate.
[0029] As shown in the accompanying drawings Figure 4 The fixed box 6 is fixedly connected with the fixed rod 19 between the two sides and the inlet pipe 2, so as to ensure the fixing effect of the fixed box 6.
[0030] As shown in the accompanying drawings Figure 2 、 4 , 5, a plurality of crushing blades 10 are distributed in the axial and circumferential directions of the rotating rod 9 in a staggered manner, so as to improve the crushing effect of large particles or agglomerated substances in the ash, and further improve the anti-blocking effect.
[0031] The utility model works as follows: when the ash of the circulating fluidized bed boiler enters the boiler ash conveying pipe 1 through the inlet pipe 2, the anti-blocking mechanism starts to work, the first motor 4 is started, the rotating shaft 5 is driven to rotate by the output end of the first motor 4, the rotating shaft 5 stably rotates in the fixed box 6, the first bevel gear 7 at the bottom of the rotating shaft 5 rotates, the first bevel gear 7 is meshed with the second bevel gear 8 on both sides, so that the rotation of the first bevel gear 7 drives the two second bevel gears 8 to rotate in opposite directions, thereby driving the rotating rod 9 inside the second bevel gear 8 to rotate, since the plurality of crushing blades 10 are distributed in the axial and circumferential directions of the rotating rod 9 in a staggered manner, when the rotating rod 9 rotates, the crushing blades 10 crush the large particles or agglomerated substances in the ash entering the inlet pipe 2, preventing these larger substances from causing blockage after entering the boiler ash conveying pipe 1, thereby playing a role in preliminary prevention of blockage.
[0032] The second motor 12 is started, and the output end of the second motor 12 drives the rotating shaft 13 to rotate, the rotating shaft 13 is rotatably connected between the fixed shell 11, so that the rotating shaft 13 can rotate stably in the fixed shell 11, the rotating shaft 13 is fixedly sleeved with the rotating roller 14, the rotating shaft 13 drives the rotating roller 14 to rotate when rotating, the rotating roller 14 is fixedly connected with the rubber impact block 15 outside, the rubber impact block 15 will continuously impact the top of the boiler ash conveying pipe 1 in the rotating process of the rotating roller 14, the vibration generated by the impact can loosen the ash attached to the inner wall of the boiler ash conveying pipe 1, avoid the ash to be accumulated on the pipe wall, thereby playing the effect of preventing blockage, the compressed air tank 16 is installed on the top of the boiler ash conveying pipe 1 close to one side of the fixed shell 11, the high-pressure gas pump 17 in the compressed air tank 16 generates high-pressure gas when working, the high-pressure gas is conveyed through the exhaust pipe 18, the exhaust pipe 18 penetrates the boiler ash conveying pipe 1 at the bottom and extends to the inside of the boiler ash conveying pipe 1, and the cross-sectional shape of the exhaust pipe 18 is L-shaped, the high-pressure gas is sprayed from the exhaust pipe 18, forms the impact on the ash in the boiler ash conveying pipe 1, drives the ash to flow, prevents the ash from being accumulated and blocked in the pipeline, and improves the anti-blocking effect of the whole ash conveying pipeline.
[0033] Finally: the above-mentioned embodiments only exemplify the principle and effect of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. Anti-blocking device for the ash conveying pipeline of a circulating fluidized bed boiler, comprising an ash conveying pipeline (1) of the boiler, characterized in that: The boiler ash conveying pipe (1) is provided with a prevention blocking mechanism at one end, and a secondary prevention blocking mechanism is arranged on the top of the boiler ash conveying pipe (1). The prevention blocking mechanism comprises an inlet pipe (2) fixedly connected at one end of the boiler ash conveying pipe (1), a fixed plate (3) fixedly connected to the top of the inlet pipe (2), a first motor (4) fixedly installed on one side of the fixed plate (3), a rotating shaft (5) fixedly connected to the output end of the first motor (4), a fixed box (6) arranged in the inlet pipe (2), a first bevel gear (7) fixedly connected to the bottom end of the rotating shaft (5), second bevel gears (8) meshing with the first bevel gear (7) on both sides, a rotating rod (9) fixedly connected to the inside of the second bevel gears (8), and broken blades (10) fixedly connected to the outside of the rotating rod (9).
2. A device according to claim 1, characterized in that: The secondary prevention blocking mechanism comprises a fixed shell (11) fixedly installed on the top of the boiler ash conveying pipe (1), and a second motor (12) fixedly installed on one side of the fixed shell (11).
3. A device according to claim 2, characterized in that: The second motor (12) is fixedly connected to the output end of the rotating shaft (13), and the rotating shaft (13) is rotatably connected to the fixed shell (11).
4. The anti-plugging device of the ash conveying pipeline of the circulating fluidized bed boiler according to claim 1, characterized in that: The boiler ash conveying pipe (1) is provided with a prevention blocking mechanism at one end, and a secondary prevention blocking mechanism is arranged on the top of the boiler ash conveying pipe (1).
5. A device according to claim 4, characterized in that: The exhaust pipe (18) penetrates the boiler ash conveying pipe (1) and extends into the inside of the boiler ash conveying pipe (1) at the bottom.
6. The anti-plugging device of the ash conveying pipeline of the circulating fluidized bed boiler according to claim 1, characterized in that: The rotating shaft (5) penetrates the inlet pipe (2) and the fixed box (6) and extends into the inside of the fixed box (6) in sequence, and the rotating shaft (5) and the rotating rod (9) are rotatably connected to the fixed box (6).
7. The anti-plugging device of the ash conveying pipeline of the circulating fluidized bed boiler according to claim 1, characterized in that: The fixed box (6) is fixedly connected to the inlet pipe (2) on both sides through a fixed rod (19).
8. The anti-plugging device of the ash conveying pipeline of the circulating fluidized bed boiler according to claim 1, characterized in that: A plurality of broken blades (10) are distributed in the axial and circumferential directions of the rotating rod (9) in a staggered manner.