Million unit side electric dust removal electric field dust conveying system and method

Abstract

The invention relates to the field of unit dust removal and dust conveying, in particular to a million unit side electric dust removal electric field dust conveying system and method.The system comprises a first electric field and a second electric field, a first dust hopper and a second dust hopper are arranged below the electric fields, continuous measuring level gauges are arranged in all the dust hoppers and bin pumps, and a pressure and flow sensor and a flow control valve are installed at a discharging port of the bottom dust hopper; an air inlet of the bin pump is connected with a high-pressure fan, and an exhaust pipe of the bin pump is connected with the ash hopper II and is provided with a backflow prevention valve. A vibration ring is arranged on the outer side of the ash hopper, sealing flange plates are arranged at the connecting positions, the two ends of the ash conveying pipe are gradually-shrunk and gradually-expanded smooth arc faces respectively, the first electric field conveys ash through the ash conveying pipe, the transfer bin and the spiral conveyor, the second electric field directly conveys the ash, and the method comprises the steps of dust collection, material level monitoring and pneumatic and mechanical combined conveying. The pneumatic and mechanical combined ash conveying device can monitor the material level in real time, adapts to different working conditions in pneumatic and mechanical combined ash conveying, has the characteristics of high efficiency, stability, gas consumption reduction and prevention of high material level of the ash hopper, and effectively improves the performance of an ash conveying system.

Description

Technical Field

[0001] This invention relates to the field of dust removal and ash conveying in power plants, and particularly to an ash conveying system and method for a side electrostatic precipitator in a megawatt-scale power plant. Background Technology

[0002] In traditional electrostatic precipitator (ESP) ash conveying systems for megawatt-scale power plants, the methods for monitoring material levels are limited and inaccurate, failing to provide real-time and continuous monitoring of ash hopper levels. This makes it difficult to clearly understand the actual material level in each hopper and accurately determine whether ash conveying is normal. Consequently, ash conveying operations lack precise data support, making it impossible to optimize ash conveying strategies in a timely manner based on material level changes. This can easily lead to high air consumption during ash conveying and frequent occurrences of high material levels in ash hoppers, resulting in serious risks such as ESP tripping and ash hopper collapse, threatening the safe and stable operation of the unit. Existing ash conveying methods are also limited, often employing only pneumatic or mechanical conveying, which cannot adapt to the ash conveying needs under different operating conditions. Furthermore, simple mechanical conveying is inefficient over long distances or when dealing with large amounts of dust, and it also results in significant equipment wear and tear.

[0003] Therefore, it is necessary to propose a dust conveying system and method for the electrostatic precipitator on the side of a megawatt-scale power plant to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a ash conveying system and method for the electrostatic precipitator on the side of a megawatt-scale power plant, so as to solve the problems of limited and inaccurate material level monitoring methods and the inability of a single ash conveying method to meet the ash conveying needs under different working conditions.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A ash conveying system for a megawatt-scale electrostatic precipitator (ESP) unit includes an ash conveying unit comprising an electric field one and an electric field two. The ash conveying unit is equipped with an ash hopper one, an ash hopper two, a high-pressure blower one, a high-pressure blower two, a silo pump one, a silo pump two, and an ash silo. The ash hopper one and ash hopper two are respectively positioned under their respective electric fields. Continuous level gauges are installed inside each of the ash hoppers one and two, and each of the silo pumps one and two for real-time continuous monitoring of the ash hopper level. Ash hopper one and ash hopper two are each connected to an ash hopper outlet at their bottom. Pressure sensors and flow sensors are installed inside the ash hopper outlets, and flow control valves are installed outside the ash hopper outlets. The silo pumps one and two... Each pump is equipped with a silo pump inlet, a silo pump air inlet, and a silo pump outlet. The ash hopper outlet is connected to the silo pump inlet. High-pressure blower one and high-pressure blower two are respectively connected to the corresponding silo pump air inlets. The silo pump outlet of silo pump two is directly connected to the ash silo. The silo pump outlet of silo pump one is connected to an ash conveying pipe. The other end of the ash conveying pipe is connected to a transfer silo. The outlet of the transfer silo is connected to a screw conveyor. The outlet of the screw conveyor is connected to the ash silo. Silo pump one and silo pump two are respectively connected to silo pump exhaust pipe one and silo pump exhaust pipe two. The other end of silo pump exhaust pipe one and silo pump exhaust pipe two are both connected to ash hopper two. Both silo pump exhaust pipe one and silo pump exhaust pipe two are equipped with anti-backflow valves.

[0007] Preferably, multiple vibrating rings are installed on the outer sides of both ash hopper one and ash hopper two, and the vibrating rings are evenly distributed on the outer sides of ash hopper one and ash hopper two, and a drive motor is connected to each vibrating ring.

[0008] Preferably, sealing flanges are installed at the connection points between the ash hopper outlets of ash hopper one and ash hopper two and the corresponding silo pump one and silo pump two, and sealing flanges are also installed at the connection points between the transfer silo outlet and the screw conveyor, as well as between the screw conveyor and the ash silo.

[0009] Preferably, the interior of the ash conveying pipe is configured with a gradually narrowing smooth arc surface at one end near the first silo pump, and the interior of the ash conveying pipe is configured with a gradually expanding smooth arc surface at the other end near the transfer silo.

[0010] Preferably, a method for conveying ash in the electrostatic precipitator field of a megawatt-scale unit, the method using the ash conveying system according to any one of claims 1-4, the method comprising:

[0011] S1: Dust-laden gas enters the electric field, and each electric field generates a strong electric field through a high-voltage power supply. Under the action of the electric field force, the dust moves towards the dust collecting electrode and is adsorbed on its surface. The rapping device periodically shakes the dust off into the ash hopper.

[0012] S2: The continuous level gauge inside the ash hopper monitors the material level in real time and transmits the data to the control system. When the material level reaches the preset level, the system issues an alarm. The system predicts the time when the hopper will be full based on the material level change trend, providing a reference for ash conveying operations.

[0013] S3: When the preset ash conveying conditions are met, the system first starts pneumatic conveying. The high-pressure blower delivers compressed air to the silo pump, which drives the dust to be conveyed to the transfer silo through the ash conveying pipe.

[0014] S4: After arriving at the transfer warehouse, start the mechanical conveying equipment to transport the dust to the ash silo at a uniform and stable speed.

[0015] Preferably, in step S1, during the process of dust falling into the ash hopper, the vibration ring on the outside of the ash hopper will continuously vibrate to maintain a uniform distribution of dust inside the ash hopper.

[0016] Preferably, when the dust in the ash hopper enters the silo pump through the ash hopper outlet, the pressure sensor and flow sensor installed inside the ash hopper outlet will monitor the dust flow rate and the pressure at the ash hopper outlet in real time. Based on the real-time dust flow rate and pressure changes in the pipeline, the opening of the flow control valve will be automatically adjusted to keep the pneumatic conveying in the optimal state.

[0017] Preferably, a silo pump exhaust pipe is installed on the silo pump. The silo pump exhaust pipe is used to discharge excess gas inside the silo pump to ensure stable air pressure inside the silo pump, so that dust can smoothly enter the silo pump and be transported.

[0018] Preferably, in step S3, one end of the ash conveying pipe is a gradually narrowing smooth arc surface, and the other end is a gradually expanding smooth arc surface. After passing through the silo pump, the dust enters the gradually narrowing smooth arc surface, which accelerates the rapid conveying of the dust. After entering the gradually expanding smooth arc surface, the dust conveying speed slows down and enters the transfer silo. During the conveying process, the dust adsorbed by each other falls to the bottom of the transfer silo. The transfer silo is cleaned manually at regular intervals. The dust in the transfer silo enters the screw conveyor for mechanical conveying until the dust reaches the ash silo.

[0019] The technical effects and advantages of this invention are as follows:

[0020] 1. The continuous level gauge in the ash hopper and silo pump monitors the material level in real time. Combined with pressure and flow sensors, it can clearly grasp the material level and ash conveying status of each ash hopper, providing a basis for optimizing the ash conveying strategy, saving ash conveying gas consumption, preventing high material levels in the ash hopper, and ensuring the efficient operation of the ash conveying system.

[0021] 2. Pneumatic conveying utilizes a high-pressure blower for power. Electric field one transports dust to the transfer bin via a conveying pipe and a special structure, while electric field two directly transports the dust to the ash silo. The transfer bin provides significant buffering to cope with fluctuations in pneumatic conveying speed, ensuring a stable supply for mechanical conveying, preventing pipe blockage, and ensuring stable dust delivery to the ash silo. This combined approach adapts to different working conditions and improves the overall stability and efficiency of dust conveying.

[0022] 3. The exhaust pipe of the silo pump discharges residual gas, maintaining stable air pressure inside the silo pump and ensuring smooth entry of fly ash into the pump. The anti-backflow valve effectively prevents external gas from flowing back, preventing impurities from entering the silo pump and affecting fly ash fluidization and conveying, thus ensuring a stable and safe ash conveying process.

[0023] 4. The vibrating ring on the outside of the ash hopper ensures uniform dust distribution, improves the accuracy of the level gauge, and creates conditions for precise ash conveying. Data from the sensor at the ash hopper outlet is used to automatically adjust the opening of the flow control valve, preventing blockage at the silo pump inlet, ensuring optimal pneumatic conveying performance, and improving the reliability of the ash conveying system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the ash conveying system of the electrostatic precipitator on the side of a megawatt-scale power plant according to the present invention.

[0025] Figure 2 This is a schematic diagram of the ash conveying method of the electrostatic precipitator on the side of a megawatt-scale power unit according to the present invention.

[0026] In the diagram: 1. Ash hopper one; 2. Ash hopper two; 3. High-pressure blower one; 4. High-pressure blower two; 5. Silo pump one; 6. Silo pump two; 7. Ash silo; 8. Continuous level gauge; 9. Ash hopper outlet; 10. Flow control valve; 11. Silo pump inlet; 12. Silo pump air inlet; 13. Silo pump outlet; 14. Ash conveying pipe; 15. Transfer silo; 16. Screw conveyor; 17. Vibrating ring; 18. Sealing flange; 19. Silo pump exhaust pipe one; 20. Silo pump exhaust pipe two; 21. Anti-backflow valve. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This invention provides, for example Figure 1The illustrated electrostatic precipitator (ESP) ash conveying system for a megawatt-scale power unit includes an ash conveying unit comprising an electric field one and an electric field two. The ash conveying unit is equipped with ash hopper one 1, ash hopper two 2, high-pressure blower one 3, high-pressure blower two 4, silo pump one 5, silo pump two 6, and an ash silo 7. Ash hopper one 1 and ash hopper two 2 are respectively positioned under their respective electric fields. Continuous level gauges 8 are installed in each of the ash hoppers, ash hopper two 2, silo pump one 5, and silo pump two 6 to continuously monitor the ash level in real time. Ash hopper one 1 and ash hopper two 2 are each connected to an ash hopper outlet 9 at their bottom. Pressure sensors and flow sensors are installed inside the ash hopper outlet 9, and flow control valves 10 are installed on the outside of the ash hopper outlet 9. Silo pump one 5 and silo pump two 6 are each equipped with a silo pump inlet. The material inlet 11, the air inlet 12 and the discharge outlet 13 of the silo pump are connected. The discharge outlet 9 of the ash hopper is connected to the inlet 11 of the silo pump. High pressure blower 1 3 and high pressure blower 2 4 are respectively connected to the corresponding air inlets 12 of the silo pump. The discharge outlet 13 of the silo pump 2 6 is directly connected to the ash silo 7. The discharge outlet 13 of the silo pump 1 5 is connected to the ash conveying pipe 14. The other end of the ash conveying pipe 14 is connected to the transfer silo 15. The discharge outlet of the transfer silo 15 is connected to the screw conveyor 16. The discharge outlet of the screw conveyor 16 is connected to the ash silo 7. The silo pump 1 5 and the silo pump 2 6 are respectively connected to the silo pump exhaust pipe 1 19 and the silo pump exhaust pipe 2 20. The other end of the silo pump exhaust pipe 1 19 and the silo pump exhaust pipe 2 20 are both connected to the ash hopper 2 2. The silo pump exhaust pipe 1 19 and the silo pump exhaust pipe 2 20 are both equipped with anti-backflow valves 21.

[0029] Furthermore, multiple vibration rings 17 are installed on the outer side of both ash hopper 1 and ash hopper 2. The vibration rings 17 are evenly distributed on the outer side of ash hopper 1 and ash hopper 2, and a drive motor is connected to the vibration ring 17.

[0030] Furthermore, sealing flanges 18 are installed at the connection points between the ash hopper outlet 9 of ash hopper 1 and ash hopper 2 and the corresponding silo pump 1 5 and silo pump 2 6. Sealing flanges 18 are also installed at the connection points between the outlet of transfer silo 15 and screw conveyor 16, and between screw conveyor 16 and ash silo 7.

[0031] Furthermore, the interior of the ash conveying pipe 14 is configured with a gradually narrowing smooth arc surface at the end near the silo pump 5, and the interior of the ash conveying pipe 14 is configured with a gradually expanding smooth arc surface at the end near the transfer silo 15.

[0032] This invention provides, for example Figure 2 The method shown is a method for conveying ash in the electrostatic precipitator field of a megawatt-scale power plant, the method comprising:

[0033] S1: Dust-laden gas enters the electric field, and each electric field generates a strong electric field through a high-voltage power supply. Under the action of the electric field force, the dust moves towards the dust collecting electrode and is adsorbed on its surface. The rapping device periodically shakes the dust off into the ash hopper.

[0034] S2: The continuous level gauge inside the ash hopper monitors the material level in real time and transmits the data to the control system. When the material level reaches the preset level, the system issues an alarm. The system predicts the time when the hopper will be full based on the material level change trend, providing a reference for ash conveying operations.

[0035] S3: When the preset ash conveying conditions are met, the system first starts pneumatic conveying. The high-pressure blower delivers compressed air to the silo pump, which drives the dust to be conveyed to the transfer silo through the ash conveying pipe.

[0036] S4: After arriving at the transfer warehouse, start the mechanical conveying equipment to transport the dust to the ash silo at a uniform and stable speed.

[0037] Furthermore, in step S1, during the process of dust falling into the ash hopper, the vibrating ring on the outside of the ash hopper will continuously vibrate to maintain the uniform distribution of dust inside the ash hopper.

[0038] Furthermore, when the dust in the ash hopper enters the silo pump through the ash hopper outlet, the pressure sensor and flow sensor installed inside the ash hopper outlet will monitor the dust flow rate and the pressure at the ash hopper outlet in real time. Based on the real-time dust flow rate and pressure changes in the pipeline, the opening of the flow control valve will be automatically adjusted to keep the pneumatic conveying in the best state at all times.

[0039] Furthermore, a silo pump exhaust pipe is installed on the silo pump. The silo pump exhaust pipe is used to discharge excess gas inside the silo pump to ensure stable air pressure inside the silo pump, so that dust can smoothly enter the silo pump and be transported.

[0040] Furthermore, in step S3, one end of the ash conveying pipe is a gradually narrowing smooth arc surface, and the other end is a gradually expanding smooth arc surface. After passing through the silo pump, the dust enters the gradually narrowing smooth arc surface, which accelerates the rapid conveying of the dust. After entering the gradually expanding smooth arc surface, the dust conveying speed slows down and enters the transfer silo. During the conveying process, the dust adsorbed by each other falls to the bottom of the transfer silo. The transfer silo is cleaned manually at regular intervals. The dust passing through the transfer silo enters the screw conveyor for mechanical conveying until the dust reaches the ash silo.

[0041] In this embodiment of the invention, an ash hopper is used to collect dust from the electric field. A continuous level gauge monitors the material levels in the ash hopper and the silo pump in real time. The purpose is to clearly understand the material level in each ash hopper and determine whether the ash conveying in each hopper is normal. By combining the material levels in the ash hopper and the silo pump, the ash conveying strategy can be optimized, saving air consumption during ash conveying and preventing high material levels in the ash hopper. A vibration ring is installed on the outside of the ash hopper to ensure uniform dust distribution inside the hopper, thereby making the data monitored by the continuous level gauge more accurate. When dust enters the silo pump through the ash hopper outlet, the system controls the opening degree of the flow control valve based on the data monitored by the pressure sensor and flow sensor, thereby controlling the amount of dust entering the silo pump per unit time and avoiding excessive dust input that could cause blockage at the silo pump inlet or inside the silo pump. The special structural design of the ash conveying pipe facilitates smoother dust transport. The transfer silo further buffers the flow. The conveying speed of the pneumatic conveying section may be unstable due to factors such as air source pressure, dust characteristics (e.g., humidity, particle size), and pipeline conditions. The transfer silo can store excess dust when the pneumatic conveying speed is high, and provide a stable dust supply for mechanical conveying when the pneumatic conveying speed is slow or temporarily interrupted. Furthermore, when dust enters the transfer silo, the sudden increase in space causes a rapid decrease in airflow velocity, and heavier dust particles settle at the bottom of the silo under gravity, preventing blockage of the transport pipeline. The dust is then transported to the ash silo by a screw conveyor. This combined pneumatic and mechanical ash conveying method can adapt to different dust characteristics and conveying requirements. When the dust's humidity, particle size, or other characteristics change, the pneumatic conveying section can adjust parameters such as compressed air pressure and flow rate to ensure smooth initial transport. The mechanical conveying section can flexibly adjust the conveying speed and conveying volume according to the actual working conditions such as the conveying distance at the back end, the position and height of the ash silo, etc., to ensure that the dust can be accurately conveyed to the designated location without being disturbed by too many external factors. Since the electric field one is closer to the air outlet, the amount of ash collected by the electric field one accounts for 80%. Connecting the exhaust pipe of the silo pump one to the ash hopper two can avoid the high-level dust in the ash hopper one from clogging the exhaust pipe of the silo pump, which would cause pressure changes inside the silo pump and affect the dust conveying. On the other hand, a valve is installed on the exhaust pipe of the silo pump. When the ash conveying system stops working or pressure fluctuations occur, external gas may flow back into the silo pump through the exhaust pipe of the silo pump. The anti-backflow valve can be closed in time to prevent backflow.

[0042] The working principle of this invention is as follows: After dust-laden gas enters the electric field, under the action of the strong electric field generated by the high-voltage power supply, the dust is adsorbed onto the dust collecting electrode and then falls into the ash hopper after being vibrated. A continuous level gauge monitors the material level inside the ash hopper; when the preset height is reached, the system alarms and predicts the time it will be full. When the ash conveying conditions are met, a high-pressure blower sends air to the hopper pump. The dust from electric field one enters the hopper pump through the ash hopper outlet (whose sensor data is used to adjust the flow rate valve), and then flows through the ash conveying pipe (with a gradually expanding and contracting arc surface structure to assist in conveying) to the transfer hopper. During this process, the hopper pump exhaust pipe discharges residual gas and has an anti-backflow valve. After buffering in the transfer hopper, the dust is conveyed to the ash silo by a screw conveyor; electric field two directly conveys the dust from the hopper pump to the ash silo. Vibration on the outside of the ash hopper ensures uniform dust distribution, and sealing flanges at all connections prevent leakage. The entire system achieves efficient and stable ash conveying through the coordinated work of all components.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A dust conveying system for a megawatt-scale electrostatic precipitator on the side of a megawatt-scale power plant, characterized in that: The system includes an electric field ash conveying unit, which comprises an electric field one and an electric field two. The electric field ash conveying unit is equipped with an ash hopper one (1), an ash hopper two (2), a high-pressure blower one (3), a high-pressure blower two (4), a silo pump one (5), a silo pump two (6), and an ash silo (7). The ash hopper one (1) and the ash hopper two (2) are respectively set under the corresponding electric fields. Continuous level gauges are installed in the ash hopper one (1), the ash hopper two (2), the silo pump one (5), and the silo pump two (6). (8) The continuous level gauge (8) is used to monitor the level of the ash hopper in real time. The bottom of the ash hopper one (1) and the ash hopper two (2) are connected to the ash hopper outlet (9). The ash hopper outlet (9) is equipped with a pressure sensor and a flow sensor. The ash hopper outlet (9) is equipped with a flow control valve (10) on the outside. The silo pump one (5) and the silo pump two (6) are equipped with a silo pump inlet (11), a silo pump air inlet (12) and a silo pump outlet. The material inlet (13) is connected to the ash hopper outlet (9) and the silo pump inlet (11). The high-pressure blower one (3) and high-pressure blower two (4) are respectively connected to the corresponding silo pump air inlets (12). The silo pump outlet (13) on the silo pump two (6) is directly connected to the ash silo (7). The silo pump outlet (13) on the silo pump one (5) is connected to an ash conveying pipe (14). The other end of the ash conveying pipe (14) is connected to a transfer silo (15). The transfer silo (15) The discharge port is connected to a screw conveyor (16), and the discharge port of the screw conveyor (16) is connected to the ash silo (7). The first silo pump (5) and the second silo pump (6) are respectively connected to the first silo pump exhaust pipe (19) and the second silo pump exhaust pipe (20). The other end of the first silo pump exhaust pipe (19) and the second silo pump exhaust pipe (20) are both connected to the second ash hopper (2). The first silo pump exhaust pipe (19) and the second silo pump exhaust pipe (20) are both equipped with anti-backflow valves (21).

2. The ash conveying system of the electrostatic precipitator on the side of a megawatt-scale power plant as described in claim 1, characterized in that: Multiple vibration rings (17) are installed on the outer side of both ash hopper one (1) and ash hopper two (2). The vibration rings (17) are evenly arranged on the outer side of ash hopper one (1) and ash hopper two (2), and a drive motor is connected to the vibration rings (17).

3. The ash conveying system of the electrostatic precipitator on the side of a megawatt-scale power plant as described in claim 1, characterized in that: Sealing flanges (18) are installed at the connection points of the ash hopper outlets (9) of ash hopper one (1) and ash hopper two (2) with the corresponding silo pump one (5) and silo pump two (6). Sealing flanges (18) are also installed at the connection points of the outlet of the transfer silo (15) with the screw conveyor (16) and the connection points of the screw conveyor (16) with the ash silo (7).

4. The ash conveying system of the electrostatic precipitator on the side of a megawatt-scale power plant according to claim 1, characterized in that: The interior of the ash conveying pipe (14) is set with a gradually narrowing smooth arc surface at the end near the silo pump (5), and the interior of the ash conveying pipe (14) is set with a gradually expanding smooth arc surface at the end near the transfer silo (15).

5. A method for conveying ash in the electrostatic precipitator field of a megawatt-scale power unit, characterized in that, This method uses the ash conveying system according to any one of claims 1-4, and the method includes: S1: Dust-laden gas enters the electric field, and each electric field generates a strong electric field through a high-voltage power supply. Under the action of the electric field force, the dust moves towards the dust collecting electrode and is adsorbed on its surface. The rapping device periodically shakes the dust off into the ash hopper. S2: The continuous level gauge inside the ash hopper monitors the material level in real time and transmits the data to the control system. When the material level reaches the preset level, the system issues an alarm. The system predicts the time when the hopper will be full based on the material level change trend, providing a reference for ash conveying operations. S3: When the preset ash conveying conditions are met, the system first starts pneumatic conveying. The high-pressure blower delivers compressed air to the silo pump, which drives the dust to be conveyed to the transfer silo through the ash conveying pipe. S4: After arriving at the transfer warehouse, start the mechanical conveying equipment to transport the dust to the ash silo at a uniform and stable speed.

6. The ash conveying method of the electrostatic precipitator on the side of a megawatt-scale power plant according to claim 5, characterized in that: In step S1, during the process of dust falling into the ash hopper, the vibration ring on the outside of the ash hopper will continuously vibrate to maintain a uniform distribution of dust inside the ash hopper.

7. The ash conveying method of the electrostatic precipitator on the side of a megawatt-scale power plant according to claim 5, characterized in that: When the dust in the ash hopper enters the silo pump through the ash hopper outlet, the pressure sensor and flow sensor installed inside the ash hopper outlet will monitor the dust flow rate and the pressure at the ash hopper outlet in real time. Based on the real-time dust flow rate and pressure changes in the pipeline, the opening of the flow control valve will be automatically adjusted to keep the pneumatic conveying in the best condition.

8. The ash conveying method of the electrostatic precipitator on the side of a megawatt-scale power plant according to claim 5, characterized in that: Install a silo pump exhaust pipe on the silo pump. The silo pump exhaust pipe is used to discharge excess gas inside the silo pump to ensure stable air pressure inside the silo pump, so that dust can smoothly enter the silo pump and be transported.

9. The ash conveying method of the electrostatic precipitator on the side of a megawatt-scale power plant according to claim 5, characterized in that: In step S3, one end of the ash conveying pipe is a gradually narrowing smooth arc surface, and the other end is a gradually expanding smooth arc surface. After passing through the silo pump, the dust enters the gradually narrowing smooth arc surface, which accelerates the rapid conveying of the dust. After entering the gradually expanding smooth arc surface, the dust conveying speed slows down and enters the transfer silo. During the conveying process, the dust adsorbed by each other falls to the bottom of the transfer silo. The transfer silo is cleaned manually at regular intervals. The dust passing through the transfer silo enters the screw conveyor for mechanical conveying until the dust reaches the ash silo.

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