System for cleaning boiler dust pollution of fossil-fuel power station

Abstract

A system for cleaning boiler dust pollution of a fossil-fuel power station, which relates to the technical field of dust cleaning. The system comprises: a dust collection hood (2), which covers a dust leakage part of a boiler body (1); a negative-pressure pipe (3), one end of which is in communication with the dust collection hood (2), and the other end of which is in communication with a dust storage bin, wherein a variable-frequency negative-pressure fan (16) is mounted on the negative-pressure pipe (3); a filter screen plate (4), which is mounted in the dust collection hood (2) and can block large-particle dust from entering the negative-pressure pipe (3); and a cleaning mechanism which is arranged in the dust collection hood (2) and can regularly clean dust adhering to the filter screen plate (4). The cleaning mechanism comprises a monitoring assembly and an execution assembly configured to clean dust off of the filter screen plate, wherein the monitoring assembly is movably arranged in the dust collection hood (2), and can monitor dust concentrations on two sides of the filter screen plate (4) in real time; the negative-pressure fan (16) and the execution assembly are both in electrically controlled connection with the monitoring assembly; and, on the basis of the measured dust concentrations on the two sides of the filter screen plate (4), the monitoring assembly can drive the execution assembly to start and stop and regulate and control the power of the negative-pressure fan (16).

Description

A system for cleaning dust pollution from thermal power plant boilers Technical Field

[0001] The present application relates to the technical field of dust cleaning, and in particular to a system for cleaning dust pollution from boilers in thermal power plants. Background Art

[0002] The coal-fired boilers of thermal power plants generate a large amount of dust. Most of this dust is processed by the electrostatic precipitator (ESP) system and then enters the ash silo. However, a small amount of dust is not transported to the ash silo. Because the boiler itself has many operating devices, such as electric doors that open and close, some of the dust that does not enter the ash silo during coal combustion is retained inside the boiler itself, while other dust leaks out from the operating devices, causing dust to spread around the boiler. When air circulates around the boiler, the dust becomes airborne, causing a certain impact on the surrounding environment.

[0003] Currently, dust removal from thermal power plant boilers is primarily done manually, using three methods: air purging, vacuuming, and manual sweeping. Cleaning the exterior of the boiler body can improve thermal efficiency, reduce energy consumption, increase unit output, extend equipment life, improve operational stability, reduce pollutant emissions, and ensure safe operation.

[0004] Regarding the above-mentioned related technologies, since the boiler body has a large area, a complex structure and is covered with dust, the cleaning efficiency is low and the dust removal effect is poor when air blowing or manual cleaning is used. Although the dust removal efficiency can be improved to a certain extent by vacuum cleaner adsorption, the amount of dust near the boiler is usually large, resulting in large particles of dust clogging the filter of the vacuum cleaner after the vacuum cleaner has been working for a period of time. Therefore, it is necessary to shut down the machine and clean the large particles of dust on the filter of the vacuum cleaner, which will also cause the problem of low dust removal efficiency.

[0005] Summary of the Invention

[0006] In order to improve the problem of low efficiency in cleaning dust attached to the outside of the boiler body, the present application provides a system for cleaning dust pollution in thermal power plant boilers.

[0007] The present application provides a system for cleaning dust pollution from thermal power plant boilers using the following technical solutions:

[0008] A system for cleaning dust pollution from boilers in thermal power plants, comprising

[0009] The dust collecting hood and sealing hood are installed at the dust leakage point of the boiler body;

[0010] The negative pressure pipe is connected to the dust collecting hood at one end and the ash bin at the other end, and a variable frequency negative pressure fan is installed on the negative pressure pipe;

[0011] The filter plate is fixedly installed in the dust hood to prevent large dust particles from entering the negative pressure pipe; and

[0012] A cleaning mechanism is arranged in the dust collecting hood and can regularly clean the dust attached to the filter plate. The cleaning mechanism includes a monitoring component and an execution component for cleaning the dust on the filter plate. The monitoring component is movably arranged in the dust collecting hood and can monitor the dust concentration on both sides of the filter plate in real time. The monitoring component includes a sliding plate slidingly arranged in the dust collecting hood, a monitor installed on the sliding plate and a driving member for driving the sliding plate to slide in the dust collecting hood. The driving member, the negative pressure fan and the execution component are all electrically connected to the monitor. The sliding plate is located on the side of the filter plate away from the boiler body, and a through hole is opened through the filter plate for the monitor to pass through.

[0013] Furthermore, the execution component includes a vibrator installed on the filter plate, and the vibrator is electrically connected to the monitor. When the monitor penetrates the through hole and detects that the dust concentration on the side of the filter plate close to the boiler body is greater than the set parameter, the monitor drives the drive member and the vibrator to start, and also drives the negative pressure fan to increase the power. At this time, the sliding plate drives the monitor to move to the side away from the boiler body, and the vibrator accelerates the falling of the dust on the filter plate until the monitor detects that the dust concentration on the side of the filter plate away from the boiler body decreases and remains stable. The monitor drives the negative pressure fan to reduce the power, and also drives the vibrator to stop cleaning the dust on the filter plate.

[0014] Furthermore, the actuator assembly also includes two groups of elastic paddles, both groups of elastic paddles are located on the side of the filter plate away from the boiler body, the two groups of elastic paddles are symmetrically arranged on both sides of the sliding plate, and one end of the elastic paddles is fixedly connected to the inner wall of the dust collecting hood, and a lever corresponding to the elastic paddle is fixed on the sliding plate. When the sliding plate drives the monitor to move toward the side away from the boiler body, the lever pushes the elastic paddle toward the side away from the filter plate. When the sliding plate drives the lever to move until it no longer contacts the elastic paddle, the elastic paddle swings freely and hits the filter plate.

[0015] Furthermore, a groove for embedding the sliding plate and the shifting rod is formed on the side wall of the filter plate close to the elastic shifting piece, and the depth of the groove is greater than the thickness of the sliding plate and the shifting rod.

[0016] Furthermore, each group of the elastic paddles is provided with a plurality of elastic paddles, which are arranged at intervals and have the same length. A plurality of corresponding levers are also provided, and the lengths of two adjacent and opposite levers are different.

[0017] Furthermore, the driving member includes a screw rod rotatably installed in the dust collecting hood, a motor driving the screw rod to rotate, and a guide rod arranged parallel to the screw rod. The guide rod is fixedly installed in the dust collecting hood. One end of the screw rod is rotatably connected to the filter plate, and the other end is passed through the dust collecting hood. The motor is located outside the dust collecting hood and connected to the end of the screw rod. One end of the sliding plate is threadedly sleeved on the screw rod, and the other end is slidably sleeved on the guide rod.

[0018] Furthermore, the screw rod is provided with flexible dust covers on both sides of the sliding plate.

[0019] Furthermore, the dust collecting hood can be detachably mounted on the boiler body.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. A dust collecting hood is installed in the sealed cover at the dust leakage point of the boiler body. A cleaning mechanism is installed in the dust collecting hood to regularly clean the dust attached to the filter plate. Driven by the negative pressure pipe and negative pressure fan, the dust at the leakage point of the boiler body can be adsorbed and cleaned efficiently and quickly without stopping the machine.

[0022] 2. The monitoring component can drive the execution component to start and stop and adjust the power of the negative pressure fan according to the dust concentration on both sides of the filter plate, so as to achieve energy saving and consumption reduction while ensuring the dust cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] FIG1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] FIG2 is a schematic cross-sectional view of the dust cover, filter plate, sliding plate and elastic paddle in an embodiment of the present application.

[0026] FIG3 is a schematic diagram of the exploded structure of the dust collecting cover, the sliding plate and the elastic paddle in the embodiment of the present application.

[0027] FIG4 is a schematic structural diagram of the dust collecting cover, the filter plate, the vibrator and the through hole in an embodiment of the present application.

[0028] Figure numerals: 1. Boiler body; 2. Dust hood; 3. Negative pressure pipe; 4. Filter plate; 5. Vibrator; 6. Sliding plate; 7. Monitor; 8. Through hole; 9. Elastic paddle; 10. Paddle rod; 11. Groove; 12. Screw rod; 13. Motor; 14. Guide rod; 15. Dust cover; 16. Negative pressure fan; 17. Separation filter tank. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention discloses a system for cleaning dust pollution from a thermal power plant boiler. Referring to Figures 1, 2, and 3, the system comprises a dust collecting hood 2 sealed on a boiler body 1 and a negative pressure pipe 3 connected to the dust collecting hood 2. Since the boiler body 1 is connected to many running equipment, such as the electric door installed on the boiler body 1 for opening and closing, dust leakage is prone to occur in the places where the running equipment is installed on the boiler body 1. For this reason, the dust collecting hood 2 is detachably installed on the equipment running place on the boiler body 1 by screws; the number of dust collecting hoods 2 can be determined according to the number of running equipment on the boiler body 1. When there are multiple running equipment connected to the boiler body 1, multiple corresponding dust collecting hoods 2 and negative pressure pipes 3 are also provided. The multiple negative pressure pipes 3 are interconnected and one end of the negative pressure pipe 3 away from the boiler body 1 is connected to the ash bin. The negative pressure pipe 3 is also provided with a variable frequency negative pressure fan 16 and a separation filter tank 17. The separation filter tank 17 is located between the negative pressure fan 16 and the dust collecting hood 2. The separation filter tank 17 can filter large particles of dust entering the negative pressure pipe 3, so that fine particles of dust are sent to the ash bin through the negative pressure pipe 3 and the negative pressure fan 16. Under normal circumstances, when the boiler body 1 is operating, the negative pressure fan 16 runs at low power. This creates a negative pressure within the negative pressure pipe 3 and the dust hood 2, causing dust leaking from the boiler body 1 to be collected in the dust hood 2. Dust is then guided by the negative pressure pipe 3 and flows through the separation filter tank 17 before reaching the ash bin. When the boiler body 1 is stopped, the dust hood 2 can be removed from the boiler body 1 and the dust inside can be cleaned.

[0031] Considering that the dust leaked from the boiler body 1 has different particle sizes, and in order to prevent large dust particles from damaging the separation filter tank 17 when they reach the separation filter tank 17 under the guidance of the negative pressure pipe 3, a filter plate 4 is fixedly installed in the dust hood 2 to prevent large dust particles from entering the negative pressure pipe 3, referring to Figures 1, 2 and 3. Although the filter plate 4 can isolate larger dust particles, long-term use will cause the filter holes on the filter plate 4 to become clogged, thereby reducing the dust adsorption efficiency, so the dust on the filter plate 4 needs to be cleaned regularly.

[0032] Considering the dust absorption efficiency and preventing dust from escaping, with reference to Figures 1, 2, 3, and 4, a cleaning mechanism is provided within the dust hood 2 to regularly clean dust adhering to the filter plate 4. The cleaning mechanism includes a monitoring component for monitoring dust concentration and an actuator component for cleaning dust from the filter plate 4. The monitoring component is movably disposed within the dust hood 2 and is capable of real-time monitoring of dust concentration on both sides of the filter plate 4. The negative pressure fan 16 and the actuator component are both electrically connected to the monitoring component. When the monitoring component detects that the dust concentration on the side of the filter plate 4 near the boiler body 1 is greater than a set parameter, indicating that the filter holes of the current filter plate 4 are clogged, the monitoring component activates the actuator component to clean the dust adhering to the filter plate 4. At the same time, the negative pressure fan 16 is also controlled to increase its power, allowing small dust particles within the dust hood 2 to quickly pass through the filter plate 4 and be discharged into the ash bin.

[0033] Since the large dust particles attached to the filter plate 4 are always located on the side of the filter plate 4 close to the boiler body 1 when cleaning, if the monitoring component is still monitoring the dust concentration on the side of the filter plate 4 close to the boiler body 1 at this time, it will always show that the dust concentration is too high, thereby prompting the execution component to continue to operate and the negative pressure fan 16 to continue to work at high power, thereby causing energy waste. For this reason, when the execution component is cleaning the large dust particles on the filter plate 4, it is necessary to control the monitoring component to move to the side of the filter plate 4 away from the boiler body 1 and monitor the dust concentration on the side of the filter plate 4 away from the boiler body 1. Only when the monitoring component detects that the dust concentration on the side of the filter plate 4 away from the boiler body 1 decreases and remains stable, it means that the current small dust particles can smoothly pass through the filter plate 4 and be promptly diverted to the ash bin by the negative pressure pipe 3. Therefore, the monitoring component can drive the execution component to stop cleaning the filter plate 4, and at the same time regulate the negative pressure fan 16 to reduce power, thereby achieving the effect of energy saving and consumption reduction.

[0034] The monitoring component needs to be movably arranged in the dust hood 2 and be capable of real-time monitoring of the dust concentration on both sides of the filter plate 4. In the embodiment of the present application, referring to Figures 2, 3 and 4, the monitoring component includes a sliding plate 6 slidingly arranged in the dust hood 2, a monitor 7 installed on the sliding plate 6 and a driving member for driving the sliding plate 6 to slide in the dust hood 2. The actuator, the driving member and the negative pressure fan 16 are all electrically connected to the monitor 7. The sliding plate 6 is located on the side of the filter plate 4 away from the boiler body 1. The monitor 7 is set as a dust concentration measuring instrument. A through hole 8 is opened on the filter plate 4 for the dust concentration measuring instrument probe to pass through. In the initial state, the negative pressure fan 16 operates at low power, and the probe on the monitor 7 passes through the through hole 8 on the filter plate 4 and monitors the dust concentration on the side of the filter plate 4 close to the boiler body 1. When the monitor 7 detects that the dust concentration on the side of the filter plate 4 close to the boiler body 1 is greater than the set value, the monitor 7 drives the executive component to start cleaning the filter plate 4. In addition, it also prompts the negative pressure fan 16 to increase the power to quickly absorb the dust, and also drives the driving part to start; the driving part drives the sliding plate 6 to drive the monitor 7 to slide away from the filter plate 4, so that the probe of the monitor 7 moves out of the through hole 8 and is positioned On the side of the filter plate 4 away from the boiler body 1, the monitor 7 can monitor the dust concentration on the side of the filter plate 4 away from the boiler body 1 until the dust concentration on the side of the filter plate 4 away from the boiler body 1 decreases and remains stable. Then the monitor 7 drives the negative pressure fan 16 to reduce power and drives the actuator to stop working. At the same time, it also drives the drive member to start, so that the drive member drives the sliding plate 6 to drive the monitor 7 to slide towards the filter plate 4 until the probe on the monitor 7 passes through the through hole 8 on the filter plate 4, so that the monitor 7 can once again monitor the dust concentration on the side of the filter plate 4 close to the boiler body 1. This cyclic monitoring not only improves the dust cleaning efficiency, but also achieves the effect of energy saving and consumption reduction.

[0035] As for the design of the execution component, in the embodiment of the present application, referring to Figures 2, 3 and 4, the execution component includes a plurality of vibrators 5 installed on the filter plate 4, and the plurality of vibrators 5 are evenly fixed on the side wall of the filter plate 4 close to the boiler body 1. The vibrators 5 are electrically connected to the monitor 7. As the plurality of vibrators 5 vibrate, the falling of dust on the filter plate 4 can be accelerated, thereby reducing the adhesion of dust on the filter plate 4.

[0036] To further improve the efficiency of cleaning dust from the filter plate 4, referring to Figures 2, 3, and 4, the actuator assembly further includes two sets of elastic paddles 9, which are made of spring steel. Both sets of elastic paddles 9 are located on the side of the filter plate 4 away from the boiler body 1, and the two sets of elastic paddles 9 are symmetrically arranged on the upper and lower sides of the sliding plate 6. Each set of elastic paddles 9 is provided with multiple elastic paddles 9, which are spaced apart along the length of the sliding plate 6. The multiple elastic paddles 9 are of the same length, and one end is fixedly connected to the inner wall of the dust hood 2. A plurality of levers 10 corresponding to the multiple elastic paddles 9 are fixedly mounted on the upper and lower sides of the sliding plate 6. In the initial state, the sliding plate 6 is located between the elastic paddle 9 and the filter plate 4. When the monitor 7 detects that the dust concentration on the side of the filter plate 4 close to the boiler body 1 is greater than the set value, the monitor 7 drives the vibrator 5 to start, and also drives the driving member to start, so that the driving member drives the sliding plate 6 to drive the monitor 7 and the lever 10 to slide away from the filter plate 4. During the sliding process, the lever 10 pushes the elastic paddle 9 toward the side away from the filter plate 4. When the sliding plate 6 drives the lever 10 to move until it no longer contacts the elastic paddle 9, the elastic paddle 9 swings freely and hits the filter plate 4, thereby accelerating the falling of dust on the filter plate 4. In order to further accelerate the falling of dust on the filter plate 4, the two adjacent levers 10 on the same side of the sliding plate 6 are of different lengths, and the lengths of the two levers 10 on both sides and corresponding to each other are also different. As a result, when the sliding plate 6 drives the lever 10 to slide and move the elastic paddles 9, the separation time of the multiple elastic paddles 9 and the corresponding multiple levers 10 are not synchronized, so that the swing of the multiple elastic paddles 9 is inconsistent, and then the multiple elastic paddles 9 are prompted to knock on the filter plate 4 respectively, thereby increasing the vibration frequency of the filter plate 4 and accelerating the falling of dust on the filter plate 4.

[0037] Considering that when the sliding plate 6 drives the lever 10 to move toward the filter plate 4, the lever 10 will still push the elastic paddle 9 to deflect. To prevent the deflected elastic paddle 9 from striking the lever 10 and causing damage to the sliding rod and the lever 10, with reference to FIG2 , a recess 11 is provided on the side wall of the filter plate 4 near the elastic paddle 9, into which the sliding plate 6 and the lever 10 are embedded. The depth of the recess 11 is greater than the thickness of the sliding plate 6 and the lever 10. When the sliding plate 6 drives the lever 10 to move toward the filter plate 4 and enters the recess 11, the elastic paddle 9 is free to deflect and cannot contact the lever 10, thereby preventing the lever 10 and the sliding plate 6 from being struck and damaged.

[0038] In order to enable the driving member to smoothly drive the sliding plate 6 to reciprocate in the dust hood 2, referring to Figures 2 and 3, the driving member includes a screw rod 12 rotatably mounted in the dust hood 2, a motor 13 that drives the screw rod 12 to rotate, and a guide rod 14 arranged parallel to the screw rod 12. The screw rod 12 and the guide rod 14 are respectively located at both ends of the sliding plate 6, one end of the guide rod 14 is connected to the filter plate 4, and the other end is connected to the cover of the dust hood 2. One end of the screw rod 12 is rotatably connected to the filter plate 4, and the other end passes through the cover of the dust hood 2 and is connected to the output end of the motor 13. The motor 13 is fixedly mounted on the cover of the dust hood 2 and is located outside the dust hood 2. One end of the sliding plate 6 is threadedly sleeved on the screw rod 12, and the other end is slidably sleeved on the guide rod 14. As the motor 13 rotates forward and backward, the screw rod 12 can drive the sliding plate 6 to slide smoothly in the dust hood 2 toward / away from the filter plate 4. Since the screw rod 12 is threadedly connected to the sliding plate 6, in order to prevent dust from adhering to the screw rod 12 and affecting the driving of the sliding plate 6, two dust covers 15 are provided on the screw rod 12. The dust covers 15 are configured as accordion covers. The two dust covers 15 are respectively located on both sides of the sliding plate 6. One end of the dust cover 15 is fixedly connected to the sliding plate 6, and the other end is fixedly connected to the cover body / filter plate 4 of the dust collecting hood 2.

[0039] The implementation principle of a system for cleaning dust pollution from a thermal power plant boiler according to an embodiment of the present application is as follows: In the initial state, the negative pressure fan 16 operates at low power, creating a negative pressure within the negative pressure pipe 3 and the dust hood 2, causing dust leaking from the boiler body 1 to be collected and transported into the dust hood 2. Dust then flows through the separation filter tank 17 under the guidance of the negative pressure pipe 3 and reaches the ash bin. Simultaneously, the sliding plate 6 and the lever 10 are both located within the recess 11, and the probe on the monitor 7 penetrates the through hole 8 on the filter plate 4 and monitors the dust concentration on the side of the filter plate 4 near the boiler body 1. When the monitor 7 detects that the dust concentration on the side of the filter plate 4 near the boiler body 1 is greater than a set value, the monitor 7 drives the vibrator 5 to vibrate. The vibration of the multiple vibrators 5 accelerates the falling of dust from the filter plate 4. In addition, the monitor 7 also prompts the negative pressure fan 16 to increase its power to quickly absorb the dust. At the same time, the monitor 7 also drives the driving member to start, so that the driving member drives the sliding plate 6 to drive the monitor 7 and the lever 10 to slide away from the filter plate 4. The probe of the monitor 7 moves out of the through hole 8 and is located on the side of the filter plate 4 away from the boiler body 1, so that the monitor 7 can monitor the dust concentration on the side of the filter plate 4 away from the boiler body 1. During the sliding process, the lever 10 moves the elastic paddle 9 toward the side away from the filter plate 4. When the sliding plate 6 drives the lever 10 to move until it no longer contacts the elastic paddle 9, the elastic paddle 9 swings freely and strikes the filter plate 4, thereby accelerating the falling of dust from the filter plate 4.

[0040] When the monitor 7 detects that the dust concentration on the side of the filter plate 4 away from the boiler body 1 decreases and remains stable, the monitor 7 drives the negative pressure fan 16 to reduce its power, drives the vibrator 5 to stop working, and also drives the driver to start, so that the driver drives the sliding plate 6 to drive the monitor 7 and the lever 10 to slide toward the filter plate 4 until the probe on the monitor 7 passes through the through hole 8 on the filter plate 4. At this time, the sliding plate 6 and the lever 10 are both located in the embedded groove 11, allowing the monitor 7 to once again monitor the dust concentration on the side of the filter plate 4 close to the boiler body 1. This cyclic monitoring not only improves the dust cleaning efficiency, but also achieves the effect of energy saving and consumption reduction.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A system for cleaning dust pollution from boilers in thermal power plants, characterized in that: include The dust collecting hood and sealing hood are installed at the dust leakage place of the boiler body; A negative pressure pipe, one end of which is connected to the dust collecting hood and the other end of which is connected to the ash bin, and a variable frequency negative pressure fan is installed on the negative pressure pipe; The filter plate is fixedly installed in the dust hood to prevent large dust particles from entering the negative pressure pipe; as well as A cleaning mechanism is arranged in the dust hood and can regularly clean the dust attached to the filter plate. The cleaning mechanism includes a monitoring component and an execution component for cleaning the dust on the filter plate. The monitoring component is movably arranged in the dust hood and can monitor the dust concentration on both sides of the filter plate in real time. The monitoring component includes a sliding plate slidably arranged in the dust hood, a monitor installed on the sliding plate and a driving member driving the sliding plate to slide in the dust hood. The driving member, the negative pressure fan and the execution component are all electrically connected to the monitor. The sliding plate is located on the side of the filter plate away from the boiler body, and a through hole is penetrated on the filter plate for the monitor to pass through.

2. A system for cleaning dust pollution in thermal power plant boilers according to claim 1, characterized in that: The actuator assembly includes a vibrator installed on the filter plate, and the vibrator is electrically connected to the monitor. When the monitor penetrates a through hole and detects that the dust concentration on the side of the filter plate close to the boiler body is greater than the set parameter, the monitor drives the driving member and the vibrator to start, and also drives the negative pressure fan to increase the power. At this time, the sliding plate drives the monitor to move to the side away from the boiler body, and the vibrator accelerates the falling of dust on the filter plate until the monitor detects that the dust concentration on the side of the filter plate away from the boiler body decreases and remains stable. The monitor drives the negative pressure fan to reduce the power, and also drives the vibrator to stop cleaning the dust on the filter plate.

3. A system for cleaning dust pollution in thermal power plant boilers according to claim 2, characterized in that: The actuator assembly also includes two groups of elastic paddles, both groups of elastic paddles are located on the side of the filter plate away from the boiler body, the two groups of elastic paddles are symmetrically arranged on both sides of the sliding plate, and one end of the elastic paddles is fixedly connected to the inner wall of the dust hood, and a lever corresponding to the elastic paddles is fixed on the sliding plate. When the sliding plate drives the monitor to move toward the side away from the boiler body, the lever pushes the elastic paddle toward the side away from the filter plate, and when the sliding plate drives the lever to move until it no longer contacts the elastic paddle, the elastic paddle swings freely and hits the filter plate.

4. A system for cleaning dust pollution in thermal power plant boilers according to claim 3, characterized in that: The side wall of the filter plate close to the elastic paddle is provided with an embedding groove for embedding the sliding plate and the paddle rod, and the depth of the embedding groove is greater than the thickness of the sliding plate and the paddle rod.

5. A system for cleaning dust pollution in thermal power plant boilers according to claim 3, characterized in that: Each group of the elastic paddles is provided with a plurality of elastic paddles, which are arranged at intervals and have the same length. A plurality of corresponding levers are also provided, and the lengths of two adjacent and opposite levers are different.

6. A system for cleaning dust pollution in thermal power plant boilers according to claim 2, characterized in that: The driving member includes a screw rod rotatably installed in the dust hood, a motor driving the screw rod to rotate, and a guide rod arranged parallel to the screw rod. The guide rod is fixedly installed in the dust hood. One end of the screw rod is rotatably connected to the filter plate, and the other end is passed through the dust hood. The motor is located outside the dust hood and connected to the end of the screw rod. One end of the sliding plate is threadedly sleeved on the screw rod, and the other end is slidably sleeved on the guide rod.

7. A system for cleaning dust pollution in thermal power plant boilers according to claim 6, characterized in that: The screw rod is sleeved with flexible dust covers on both sides of the sliding plate.

8. A system for cleaning dust pollution in thermal power plant boilers according to claim 6, characterized in that: The dust collecting hood can be detachably mounted on the boiler body.

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