Anti-blocking conveying device for high-temperature smoke dust of coal-fired power plant

Abstract

The utility model discloses a coal-fired power plant high-temperature smoke dust anti-blocking conveying device which comprises an ash hopper, an ash discharging pipeline, a bin pump, a balance pipeline, an air inlet pipeline, an ash discharging pipeline and a circulation pipeline, the ash discharging pipeline comprises a vertical pipe and a branch pipe, the upper end of the vertical pipe is communicated with the ash hopper, the lower end of the vertical pipe is detachably closed, and meanwhile the vertical pipe is provided with a vibrating machine. One end of the branch pipe is obliquely communicated with the side edge of the vertical pipe, the other end of the branch pipe is communicated with the bin pump, the balance pipeline is connected with the bin pump and the ash hopper, the air inlet pipeline and the ash outlet pipeline are respectively connected with the bin pump, and the circulation pipeline is communicated with the air inlet pipeline and the ash outlet pipeline. According to the device, the ash blocking condition can be monitored in real time, meanwhile, ash blocking can be treated in time, normal operation of the device is guaranteed, and the ash blocking re-dredging probability of the device is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-temperature smoke and dust treatment in power plants, and particularly relates to an anti-blocking conveying device for high-temperature smoke and dust in a coal-fired power plant. Background Technique

[0002] After the flue gas of a coal-fired power plant is subjected to dust removal treatment, the dust in the flue gas falls into the ash hopper. Under the action of its own gravity, it enters the silo pump through the ash discharge pipe. After the silo pump is fluidized, it is pneumatically conveyed to the ash bunker through the ash conveying pipe. In actual operation, it is found that the ash discharge pipe and the ash conveying pipe are prone to blockage.

[0003] For example, Chinese Patent CN205471640U discloses a boiler ash conveying system for a power plant, including an air preheater and a dust collector connected to the air preheater. The dust collector removes dust from the air and discharges the dust-removed air into the chimney. The dust after the dust collector removes dust is conveyed to the ash hopper. The ash hopper is connected to the silo pump through a first pipeline provided with a feed valve. The ash hopper and the silo pump are also connected through a second pipeline provided with a balance valve. A three-way pipe is provided at the bottom of the silo pump. The three-way pipe is also respectively connected to an ash conveying pipeline provided with a discharge valve and a third pipeline provided with an intake valve. The other end of the ash conveying pipeline is connected to an ash bunker, and the other end of the third pipeline is connected to a gas storage tank. The ash discharge pipe of the ash hopper and the ash discharge pipe of the ash are prone to blockage in this patent. Summary of the Utility Model

[0004] Aiming at the above problems, the purpose of the utility model is to provide an anti-blocking conveying device for high-temperature smoke and dust in a coal-fired power plant.

[0005] The specific technical solutions are as follows:

[0006] An anti-blocking conveying device for high-temperature smoke and dust in a coal-fired power plant includes an ash hopper, an ash discharge pipeline, a silo pump, a balance pipeline, an intake pipeline, an ash discharge pipeline, and a circulation pipeline. The ash discharge pipeline includes a vertical pipe and a branch pipe. The upper end of the vertical pipe is communicated with the ash hopper, and the lower end is detachably closed and is also provided with a vibrator. One end of the branch pipe is obliquely communicated with the side of the vertical pipe, and the other end is communicated with the silo pump. The balance pipeline connects the silo pump and the ash hopper. The intake pipeline and the ash discharge pipeline are respectively connected to the silo pump. The circulation pipeline communicates the intake pipeline and the ash discharge pipeline.

[0007] Furthermore, a temperature measuring point and an ash discharge valve are provided on the branch pipe. Since a temperature measuring point is provided on the branch pipe, during normal operation, due to the periodic passage of high-temperature smoke and dust through the branch pipe into the silo pump, the temperature measuring point will show periodic temperature fluctuations. When the branch pipe is blocked by ash, the high-temperature smoke and dust cannot come down, and the temperature measuring point will not show periodic temperature fluctuations but will gradually decrease, which can intuitively reflect whether the branch pipe is blocked by ash.

[0008] Furthermore, a balance valve is provided on the balance pipeline, and an intake valve is provided on the intake pipeline. The balance pipeline is provided to balance the air pressure between the ash hopper and the silo pump when the branch pipeline discharges ash, enabling the ash to fall smoothly. When the ash discharge pipeline is blocked, the residual ash in the silo pump can be retransported into the ash hopper through the loop formed by the intake pipeline, the silo pump, and the balance pipeline, and the blocked ash in the ash discharge pipeline can be back-sucked through the negative pressure in the ash hopper, increasing the probability of unblocking the blocked pipeline to a certain extent.

[0009] Furthermore, a pressure measuring point and an ash discharge valve are provided on the ash discharge pipeline. A pressure measuring point is provided on the ash discharge pipeline. During normal operation, the pressure measuring point will show periodic fluctuations. When the ash discharge pipeline is blocked and the soot cannot go out, the pressure measuring point will not show periodic pressure fluctuations but will always maintain a certain high value, which can intuitively reflect whether the ash discharge pipeline is blocked by ash.

[0010] Furthermore, the branch pipeline is connected to the vertical pipeline at an angle of 30 - 45°, ensuring that the ash in the ash hopper can smoothly enter the branch pipeline.

[0011] Furthermore, the distance between the end of the branch pipeline connected to the vertical pipeline and the lower end of the vertical pipeline is 5 cm - 10 cm, reducing the accumulation of ash in the vertical pipeline, ensuring that when blocked, the ash can smoothly discharge from the vertical pipeline and facilitating reception.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The present utility model can monitor the ash blockage situation in real time and can also timely handle the ash blockage, ensuring the normal operation of the device and increasing the probability of unblocking the blocked ash of the device. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] In the figure: 1. Ash hopper; 2. Ash discharge pipeline; 21. Vertical pipeline; 22. Branch pipeline; 221. Temperature measuring point; 222. Ash discharge valve; 3. Silo pump; 4. Balance pipeline; 41. Balance valve; 5. Intake pipeline; 51. Intake valve; 6. Ash discharge pipeline; 61. Pressure measuring point; 62. Ash discharge valve; 7. Circulation pipeline; 8. Vibrator. Detailed Embodiments

[0016] The following further describes the present utility model with reference to the drawings in the specification, but the protection scope of the present utility model is not limited thereto.

[0017] As Figure 1As shown in the figure, a high-temperature dust anti-blocking conveying device for a coal-fired power plant includes a ash hopper 1, a ash discharging pipeline 2, a bin pump 3, a balance pipeline 4, an air inlet pipeline 5, an ash outlet pipeline 6 and a circulation pipeline 7. The ash discharging pipeline 2 includes a vertical pipe 21 and a branch pipe 22. The upper end of the vertical pipe 21 is connected to the ash hopper 1, and the lower end extends downward and is detachably closed. At the same time, a vibrator 8 is provided. One end of the branch pipe 22 is inclined and connected to the side of the vertical pipe 21 at an inclination angle of 30-45°, and the other end is connected to the bin pump 3. The distance between the end of the branch pipe 22 connected to the vertical pipe 21 and the lower end of the vertical pipe 21 is 5 cm - 10 cm. A temperature measuring point 221 and an ash discharging valve 222 are provided on the branch pipe 22. The balance pipeline 4 connects the bin pump 3 and the ash hopper 1, and a balance valve 41 is provided on the balance pipeline 4. The air inlet pipeline 5 and the ash outlet pipeline 6 are respectively connected to the bin pump 3. An air inlet valve 51 is provided on the air inlet pipeline 5, and a pressure measuring point 61 and an ash outlet valve 62 are provided on the ash outlet pipeline 6. The circulation pipeline 7 communicates the air inlet pipeline 5 and the ash outlet pipeline 6.

[0018] Since a temperature measuring point 221 is provided on the branch pipe 22, during normal operation, due to the periodic passage of high-temperature dust through the branch pipe 22 and into the bin pump 3, the temperature measuring point 221 will show periodic temperature fluctuations. When the branch pipe 22 becomes blocked with ash, the high-temperature dust cannot come down, and the temperature measuring point 221 will not show periodic temperature fluctuations but will gradually decrease. A pressure measuring point 61 is provided on the ash outlet pipeline 6. During normal operation, the pressure measuring point 61 will show periodic fluctuations. When the ash outlet pipeline 6 becomes blocked, the dust cannot be discharged, and the pressure measuring point 61 will not show periodic pressure fluctuations but will always maintain a certain high value. The setting of the balance pipeline 4 equalizes the air pressure between the ash hopper 1 and the bin pump 3 when the branch pipe 22 discharges ash, enabling the ash to fall smoothly. When the ash outlet pipeline 6 is blocked with ash, the residual ash in the bin pump 3 can be re-transported back to the ash hopper 1 through the loop formed by the air inlet pipeline 5, the bin pump 3 and the balance pipeline 4, and the blocked ash in the ash outlet pipeline 6 can be sucked back by the negative pressure in the ash hopper 1. The setting of the circulation pipeline 7 between the air inlet pipeline 5 and the ash outlet pipeline 6 is equivalent to leading out an additional path of conveying gas to the ash outlet pipeline 6, reducing the risk of ash blockage in the ash outlet pipeline 6 and creating a negative pressure at the ash outlet pipeline 6 to improve the ash conveying efficiency. When the branch pipe 22 is blocked with ash and cannot be unblocked by the above means, the lower end opening of the vertical pipe 21 can be opened, and the vibrator 8 can be started to discharge the blocked ash in the ash hopper 1 and transport it out.

Claims

1. A high-temperature soot anti-blocking conveying device for a coal-fired power plant, characterized in that It includes a hopper (1), a downward ash pipeline (2), a silo pump (3), a balance pipeline (4), an air inlet pipeline (5), an ash discharge pipeline (6) and a circulation pipeline (7). The downward ash pipeline (2) includes a vertical pipe (21) and a branch pipe (22). The upper end of the vertical pipe (21) is communicated with the hopper (1), and the lower end is detachably closed and is also provided with a vibrator (8). One end of the branch pipe (22) is obliquely communicated with the side of the vertical pipe (21), and the other end is communicated with the silo pump (3). The balance pipeline (4) connects the silo pump (3) and the hopper (1). The air inlet pipeline (5) and the ash discharge pipeline (6) are respectively connected to the silo pump (3). The circulation pipeline (7) communicates the air inlet pipeline (5) and the ash discharge pipeline (6).

2. The high-temperature soot anti-blocking conveying device for a coal-fired power plant according to claim 1, characterized in that, A temperature measuring point (221) and a downward ash valve (222) are provided on the branch pipe (22).

3. The high-temperature soot anti-blocking conveying device for a coal-fired power plant according to claim 2, characterized in that, A balance valve (41) is provided on the balance pipeline (4), and an air inlet valve (51) is provided on the air inlet pipeline (5).

4. The high-temperature soot anti-blocking conveying device for a coal-fired power plant according to claim 3, characterized in that, A pressure measuring point (61) and an ash discharge valve (62) are provided on the ash discharge pipeline (6).

5. The high-temperature soot anti-blocking conveying device for a coal-fired power plant according to claim 4, wherein, The branch pipe (22) is connected to the vertical pipe (21) at an angle of 30 - 45°.

6. The high-temperature soot anti-blocking conveying device for a coal-fired power plant according to claim 5, wherein The distance between the end of the branch pipe (22) connected to the vertical pipe (21) and the lower end of the vertical pipe (21) is 5 cm - 10 cm.

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