A dust removal device and method for flue gas from a power generation boiler

Abstract

This invention provides a dust removal device and method for flue gas from a power generation boiler, belonging to the technical field of flue gas dust removal equipment. It includes a dust collection box, an ash hopper, an anode unit, and a cathode rod. The anode unit includes an installation box, configured as a hollow box with an ash collection port at the bottom. The bottom of the installation box extends into the ash hopper. Multiple installation ports are provided on both sides of the installation box, and an anode plate is rotatably connected to each installation port. This invention, by setting up a hollow installation box with installation ports on the side walls and rotatably installing the anode plate within these ports, and by providing a first air pipe and a pulse jet pipe inside the installation box, allows the dust-collecting surface of the anode plate to rotate into the installation box for pulse jet cleaning when cleaning is required. The dislodged dust is confined within the closed installation box and falls back down, preventing dust generated during anode plate cleaning from being re-entrained by the flue gas and flowing downstream.

Description

Technical Field

[0001] This invention belongs to the technical field of flue gas dust removal equipment, specifically referring to a flue gas dust removal device and method for power generation boilers. Background Technology

[0002] In the field of flue gas treatment for power generation boilers, electrostatic precipitators are commonly used to purify dust in the flue gas. They feature extremely low airflow resistance and high flow rate capacity, and their dust removal efficiency can stably reach 99.9%. An electrostatic precipitator is a highly efficient dust removal device that uses a high-voltage DC electric field to purify flue gas. It is installed in the tail flue of the boiler, and its core consists of a corona electrode (cathode) and a dust collecting electrode (anode).

[0003] During operation, the high-voltage electric field is used to ionize the surrounding gas into a large number of positive and negative ions. When the dust-laden flue gas passes through the electric field, the dust collides with the ions and becomes charged. Most of the dust becomes negatively charged and then migrates to the grounded dust collection electrode under the action of the electric field force and is deposited. After that, it is periodically rapped to clean the dust and falls into the ash hopper for discharge. It is the core environmental protection facility for coal-fired power generation boilers to achieve ultra-low emissions of flue gas and protect the atmospheric environment.

[0004] Currently, periodic rapping is used to clean the dust adsorbed on the dust collecting electrode. However, when the dust collecting electrode is rapped, the dust deposited on the plate surface will be re-raised during the detachment process, forming secondary dust. At this time, the dust-laden flue gas in the flue is still in a flowing state, and the airflow will quickly carry these dusts downstream, causing secondary pollution and seriously weakening the overall purification effect and ultra-low emission stability of the dust removal system. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a flue gas dust removal device for power generation boilers, so as to at least partially solve the problems mentioned in the background art.

[0006] The technical solution adopted by this invention is as follows: This invention proposes a dust removal device for flue gas from a power generation boiler, comprising: The dust collection box has a dust hopper connected to its bottom for collecting dust. Multiple anode units are arranged parallel to the direction of flue gas flow and located inside the dust collection box shown. Multiple cathode rods distributed along the direction of flue gas flow are provided on both sides of each anode unit. The anode unit includes a mounting box, which is configured as a hollow box with an ash discharge port at the bottom. The bottom of the mounting box extends into the ash hopper. Multiple mounting ports are provided on both sides of the mounting box. An anode plate is rotatably connected to each mounting port. Two drive units are installed on the top of the mounting box to drive the anode plates on both sides to rotate, so that the two sides of the anode plates can be flipped alternately. The installation box contains multiple horizontally arranged first air pipes evenly distributed along the height direction. The top of the installation box is equipped with an air supply unit that supplies air to the first air pipes. Multiple blowpipes facing the anode plate are installed on the first air pipes for pulse-jet cleaning of the anode plate.

[0007] Furthermore, two symmetrically arranged baffles are installed on the top of the ash hopper, and the baffles are provided with lower clearance grooves corresponding to the mounting box. The bottom of the mounting box extends into the ash hopper from the lower clearance grooves.

[0008] Furthermore, two tilting motors are fixed to the outside of the ash hopper, and the output ends of the two tilting motors extend into the ash hopper and are respectively connected to the two baffles for driving the baffles to tilt.

[0009] Furthermore, a cover plate is fixed to the top of the dust collection box, and an upper clearance groove corresponding to the mounting box is opened on the cover plate. The top of the mounting box extends from the upper clearance groove to the outer side of the top of the dust collection box.

[0010] Furthermore, the gas supply unit includes a gas tank and a second gas pipe. The gas tank is fixed to the top of the mounting box, one end of the second gas pipe is connected to the gas tank, the other end of the second gas pipe extends into the mounting box, and one end of the first gas pipe is connected to the second gas pipe.

[0011] Furthermore, a pulse valve is fixed at one end of the first trachea that connects to the second trachea.

[0012] Furthermore, the drive unit includes a drive shaft and a geared motor. The drive shaft is arranged along the distribution direction of the anode plates. The output shaft of the geared motor is connected to the drive shaft and is used to drive the drive shaft to rotate. A worm gear corresponding to the number of anode plates is coaxially arranged on the drive shaft. The anode plate has a rotating shaft fixed at its top end. The anode plate is rotatably connected to the mounting port through the rotating shaft. The top end of the rotating shaft extends to the top of the mounting box and is fixed with a worm gear. The worm meshes with the worm gear.

[0013] Furthermore, a weighing sensor is fixed at each of the four top corners of the mounting box, and the mounting box is connected to the cover plate through the weighing sensor, so that the weighing sensor can detect the weight of the anode unit in real time.

[0014] Furthermore, the two ends of the mounting box are provided with V-shaped surfaces to reduce the resistance to flue gas flow.

[0015] A method for dust removal from flue gas of a power generation boiler, based on the aforementioned flue gas dust removal equipment for a power generation boiler, includes the following steps: S1: Introduce the dust-laden flue gas into the dust collection box, so that the flue gas flows in a direction parallel to the anode unit. At the same time, apply a high-voltage DC electric field between the cathode rod and the anode plate, so that the dust in the flue gas is charged under the action of the electric field force and adsorbed onto the surface of the anode plate. S2: The overall weight change of the anode unit is detected in real time by weighing sensors fixed at the four corners of the top of the mounting box. When the detected weight exceeds the preset threshold, it is determined that a dust removal operation needs to be performed. S3: Start the drive unit to drive the anode plate to rotate ° in the mounting port, so that the outer side of the anode plate rotates into the mounting box, and correspondingly, the inner side rotates to the outer side, and the side that rotates to the outer side continues to collect dust. S4: The air supply unit supplies air to multiple first air pipes inside the installation box, and sprays it in a pulse manner through the blowpipe onto the inner surface of the anode plate. The airflow impacts and peels off some of the dust attached to the anode plate. The dust falls down along the inside of the installation box and falls into the ash hopper from the ash discharge port at the bottom, completing one dust cleaning cycle. S5: When the weighing sensor detects that the total weight of the anode unit exceeds the preset threshold, the anode plate is rotated again, so that the side that has been cleaned is moved to the outside to collect dust, and the other side that was originally collected dust is moved to the inside, and the dust is cleaned again by jet blowing.

[0016] Beneficial effects: By setting up a hollow mounting box with an installation port on the side wall, and rotating the anode plate inside the installation port, and setting up a first air pipe and a blowpipe inside the mounting box, when dust removal is required, the dust collection surface of the anode plate can be rotated into the mounting box for pulse blow cleaning, and the stripped dust is confined to the closed mounting box and falls, preventing the dust generated during the anode plate cleaning from being carried downstream by the flue gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a power generation boiler flue gas dust removal device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the dust removal box in a power generation boiler flue gas dust removal device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the upper and lower avoidance grooves in a flue gas dust removal device for a power generation boiler according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the positional distribution of the anode unit and cathode rod in a flue gas dust removal device for a power generation boiler according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the anode unit in a power generation boiler flue gas dust removal device according to an embodiment of the present invention; Figure 6This is a schematic diagram showing the location of the installation port in a power generation boiler flue gas dust removal device according to an embodiment of the present invention; Figure 7 This is a schematic diagram showing the positional distribution of the first gas pipe and the jet pipe in a flue gas dust removal device for a power generation boiler according to an embodiment of the present invention; Figure 8 This is a schematic diagram showing the connection between the anode plate and the drive unit in a flue gas dust removal device for a power generation boiler according to an embodiment of the present invention; Figure 9 This is a schematic diagram showing the connection between the drive unit and the worm gear in a flue gas dust removal device for a power generation boiler according to an embodiment of the present invention.

[0018] The components include: 1. Dust collection box; 11. Cover plate; 101. Upper clearance groove; 2. Ash hopper; 21. Baffle; 22. Tilting motor; 201. Lower clearance groove; 3. Anode unit; 301. Mounting port; 302. Ash discharge port; 31. Mounting box; 311. V-shaped surface; 32. Anode plate; 321. Worm gear; 33. First air pipe; 34. Pulse pipe; 35. Pulse valve; 4. Cathode rod; 5. Air tank; 51. Second air pipe; 6. Drive unit; 61. Drive shaft; 62. Worm gear; 63. Gear motor; 7. Weighing sensor.

[0019] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0020] The technical solutions in 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, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0021] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0022] Combination Figures 1-9 As shown, an embodiment of the present invention provides a dust removal device for flue gas from a power generation boiler, including a dust removal box 1, an ash hopper 2, multiple anode units 3, and multiple cathode rods 4.

[0023] Combination Figure 1 and Figure 3 As shown, the dust collector 1 is a rectangular box structure with a flue gas inlet and a flue gas outlet at its left and right ends, respectively. The bottom of the dust collector 1 is connected to a dust hopper 2 for collecting dust, which is funnel-shaped with a larger top and a smaller bottom.

[0024] Furthermore, the top of the dust collection box 1 is fixed with a cover plate 11 by bolts, and the cover plate 11 has a plurality of upper clearance grooves 101 evenly distributed along the length direction.

[0025] Combination Figure 2 and Figure 4 As shown, multiple anode units 3 are arranged inside the dust collector 1 parallel to the direction of flue gas flow. On the left and right sides of each anode unit 3 (i.e., on both sides along the direction of flue gas flow), multiple cathode rods 4 are provided. These cathode rods 4 are evenly distributed along the direction of flue gas flow, and the top of the cathode rods 4 is connected to the cover plate 11.

[0026] Combination Figure 5 and Figure 6 As shown, each anode unit 3 includes a mounting box 31. The mounting box 31 is a hollow cuboid box with an open bottom. Its bottom forms a dust collection port 302. The top of the mounting box 31 extends through the upper clearance groove 101 to the outer top of the dust collector box 1 for easy installation and maintenance. On the two side walls of the mounting box 31 (i.e., two large-area side walls parallel to the flue gas flow direction), there are multiple mounting ports 301 evenly distributed along the flue gas flow direction. Each mounting port 301 is rotatably connected to an anode plate 32 through a rotating shaft. The anode plate 32 is a rectangular metal plate. The rotating shaft at its top extends upward to the top of the mounting box 31 and is coaxially fixed with a worm gear 321.

[0027] Combination Figure 8 and Figure 9 As shown, two drive units 6 are mounted on the top of the mounting box 31, respectively for driving the rotation of the anode plates 32 on both sides of the mounting box 31. Each drive unit 6 includes a drive shaft 61 and a geared motor 63. The drive shaft 61 is arranged along the distribution direction of the anode plates 32 (i.e., the flue gas flow direction) and is mounted on the top of the mounting box 31 via a bearing seat. The geared motor 63 is fixed to one end of the top of the mounting box 31, and its output shaft is connected to the drive shaft 61 via a coupling. Multiple worm gears 62 are coaxially arranged on the drive shaft 61. The number of worm gears 62 is the same as the number of anode plates 32 on the corresponding side, and each worm gear 62 meshes with the worm wheel 321 at the top of the corresponding anode plate 32.

[0028] When the geared motor 63 starts, the drive shaft 61 rotates, and through the transmission of the worm 62 and the worm wheel 321, it drives the anode plate 32 to rotate synchronously. Since the worm wheel and worm have self-locking characteristics, the anode plate 32 can stably maintain its set angle position after completing the rotation.

[0029] In a specific embodiment, the cathode rod 4 is electrically connected to the negative terminal of an external DC high-voltage power supply, while the anode plate 32 is grounded through the mounting box 31, thereby forming a high-voltage electrostatic field between the cathode rod 4 and the anode plate 32.

[0030] Combination Figure 6 and Figure 7 As shown, multiple horizontally arranged first air pipes 33 are installed inside the mounting box 31. These first air pipes 33 are evenly distributed along the height direction, and each first air pipe 33 is equipped with multiple blow pipes 34. The outlet of the blow pipe 34 faces the inner side of the anode plate 32 on the side wall of the mounting box 31 (i.e., the side facing the inside of the mounting box 31).

[0031] It should be noted that the first air pipe 33 is located in the middle of the mounting box 31, and the internal space of the mounting box 31 is sufficient so that the first air pipe 33 and the blow pipe 34 will not interfere with the rotation of the anode plate 32.

[0032] Furthermore, an air supply unit is installed on the top of the mounting box 31. The air supply unit includes an air tank 5 and a second air pipe 51. The air tank 5 is fixed to the top of the mounting box 31 and is used to store compressed air at a certain pressure. One end of the second air pipe 51 is connected to the outlet of the air tank 5, and the other end of the second air pipe 51 extends downward into the interior of the mounting box 31. The same end of multiple first air pipes 33 (e.g., the end near the second air pipe 51) is connected to the second air pipe 51. A pulse valve 35 is installed at the connection between the first air pipe 33 and the second air pipe 51. By controlling the opening and closing of the pulse valve 35, the compressed air in the air tank 5 can be sent into the first air pipe 33 in a pulse form through the second air pipe 51, and then sprayed out at high speed by the blowpipe 34 to impact and clean the inner surface of the anode plate 32.

[0033] Thus, under the influence of a strong electric field, the gas near the cathode rod 4 is ionized, generating a large number of free electrons and positive ions. As the electrons move towards the grounded anode plate 32, they collide with dust particles in the flue gas, causing the dust particles to become negatively charged. Under the influence of the electric field, the charged dust particles migrate towards the anode plate 32 and are firmly adsorbed onto the outer surface of the anode plate 32 (i.e., the side facing the flue gas flow). The clean flue gas is discharged from the outlet of the dust collector 1.

[0034] The anode plate 32 is driven to rotate 180° by the drive unit 6. After the rotation is completed, the outer side of the anode plate 32, which was originally located outside the mounting box 31 and had a thick layer of dust adsorbed, rotates to the inside of the mounting box 31; correspondingly, the inner side of the anode plate 32, which was originally located inside the mounting box 31 and was relatively clean, rotates to the outside and continues to participate in the adsorption and collection of dust in the flue gas. This rotation process is rapid and can achieve continuous surface changing without stopping the machine.

[0035] After the anode plate 32 completes its rotation, the pulse valve 35 opens and closes rapidly at an extremely high frequency. Compressed air from the gas tank 5 enters each of the first gas pipes 33 instantaneously through the second gas pipe 51, and is then sprayed out as a high-speed pulse airflow through the blowpipe 34 onto the inner surface of the anode plate 32 (the dust-accumulated surface that has now rotated to the inner side). The high-speed airflow generates a strong impact and peeling effect on the surface of the anode plate 32, causing the attached dust to detach from the plate surface. The detached dust settles downwards due to gravity within the relatively enclosed space of the mounting box 31, and finally falls through the dust collection port 302 at the bottom. Since the dust falls entirely within the mounting box 31, the total amount of dust carried by the high-speed flue gas and carried downstream can be significantly reduced.

[0036] Understandably, the gas tank 5 is connected to an external gas supply device via a hose. When the gas pressure inside the gas tank 5 is lower than the preset value, the external gas supply device fills the gas tank 5 with gas to maintain sufficient gas pressure to complete at least one cleaning cycle.

[0037] Combination Figure 5 As shown, a weighing sensor 7 is fixed at each of the four corners of the top of the mounting box 31. The mounting box 31 is suspended and fixed on the cover plate 11 by these four weighing sensors 7. The weighing sensors 7 can detect the total weight of the entire anode unit 3 (including the mounting box 31, internal components and adsorbed dust) in real time.

[0038] The weighing sensor 7 continuously monitors the overall weight of the entire anode unit 3 in real time and transmits the weight signal to the external controller. As the dust layer adsorbed on the outer side of the anode plate 32 gradually thickens, the total weight of the anode unit 3 will gradually increase. The controller has a preset weight threshold. When the controller detects that the real-time weight signal exceeds the preset threshold, it determines that the current dust adsorption amount has reached the level that requires cleaning and automatically triggers the cleaning operation command.

[0039] Furthermore, V-shaped surfaces 311 are provided on the outer walls of the left and right ends of the mounting box 31. These V-shaped surfaces 311 face the direction of flue gas flow and can effectively reduce the flow resistance of flue gas when it bypasses the end of the anode unit 3.

[0040] Combination Figure 2 and Figure 3 As shown, two symmetrically arranged baffles 21 are also provided on the top of the ash hopper 2. The shape of the baffles 21 matches the top opening of the ash hopper 2. Each baffle 21 has a lower clearance groove 201 that corresponds to the bottom contour of the mounting box 31. The bottom of the mounting box 31 passes through the lower clearance groove 201 and extends downward into the interior of the ash hopper 2.

[0041] In this way, the flow of flue gas and ash hopper 2 are isolated by baffle 21. When the anode plate 32 is cleaned, the dust can fall along the inside of the closed installation box 31 and fall directly into the baffle 21 through the ash discharge port 302. The dust does not come into contact with the flow of flue gas during the entire falling process, which further reduces the amount of dust carried by the flue gas and avoids secondary pollution.

[0042] Furthermore, two tilting motors 22 are fixed on the outer wall of the ash hopper 2. The output ends of the two tilting motors 22 are connected to two baffles 21 through rotating shafts, respectively, to drive the baffles 21 to tilt between horizontal and inclined positions.

[0043] During normal operation, the baffle 21 is always in a horizontal state, which isolates the flowing flue gas from the ash hopper 2, preventing the dust generated during the cleaning of the anode plate 32 from being carried downstream by the flue gas.

[0044] After a certain period of time, the flipping motor 22 drives the baffle 21 to flip to an inclined state. At this time, the baffle 21 is in the open state, and the dust deposited on the baffle 21 can fall into the ash hopper 2.

[0045] This embodiment provides a method for dust removal from flue gas in a power generation boiler, specifically including the following steps: S1: Normal operation and dust removal stage.

[0046] Dust-laden flue gas from the tail end of a coal-fired boiler is introduced into dust collector 1, and the flue gas flow rate is controlled to ensure that the flue gas flows parallel to the anode unit 3. Simultaneously, a high-voltage DC electric field is applied between the cathode rod 4 and the anode plate 32. Under the influence of the strong electric field, the gas near the cathode rod 4 is ionized, generating a large number of free electrons and positive ions. As the electrons move towards the grounded anode plate 32, they collide with dust particles in the flue gas, causing the dust particles to become negatively charged. The charged dust particles migrate towards the anode plate 32 under the influence of the electric field and are firmly adsorbed onto the outer surface of the anode plate 32 (i.e., the side facing the flue gas flow). Clean flue gas is discharged from the outlet of dust collector 1.

[0047] S2: Determining the timing of dust removal.

[0048] During equipment operation, four weighing sensors 7 located at the four corners of the top of the mounting box 31 continuously monitor the overall weight of the entire anode unit 3 in real time and transmit the weight signal to the external controller. As the dust layer adsorbed on the outer surface of the anode plate 32 gradually thickens, the total weight of the anode unit 3 gradually increases. The controller has a preset weight threshold. When the controller detects that the real-time weight signal exceeds the preset threshold, it determines that the current dust adsorption amount of the anode unit 3 has reached the level requiring cleaning and automatically triggers the cleaning operation command.

[0049] S3: Rotate the anode plate to change its surface.

[0050] After receiving the dust removal command, the controller first starts the geared motor 63 in the drive unit 6. The geared motor 63 drives the drive shaft 61 to rotate, and the worm gear 62 on the drive shaft 61 drives the meshing worm wheel 321 to rotate, thereby causing all the anode plates 32 to rotate synchronously 180° around the shaft at their top. After the rotation is completed, the outer surface of the anode plates 32, which was originally located outside the mounting box 31 and had a thick layer of dust adsorbed, rotates to the inside of the mounting box 31; correspondingly, the inner surface of the anode plates 32, which was originally located inside the mounting box 31 and was relatively clean, rotates to the outside and continues to participate in the adsorption and collection of dust in the flue gas. This rotation process is rapid and can achieve surface changing without stopping the machine.

[0051] S4: Pulse jet cleaning.

[0052] After the anode plate 32 completes its rotation, the pulse valve 35 opens and closes rapidly at an extremely high frequency. Compressed air from the air tank 5 enters each of the first air pipes 33 instantaneously through the second air pipe 51, and is then ejected as a high-speed pulse airflow through the blowpipe 34 onto the inner surface of the anode plate 32 (the dust-accumulated surface that has now rotated to the inner side). The high-speed airflow generates a strong impact and peeling effect on the surface of the anode plate 32, causing the attached dust to detach from the plate surface. The detached dust settles downwards due to gravity within the relatively enclosed space of the mounting box 31, and finally falls through the dust collection port 302 at the bottom.

[0053] S5: Cyclic Cleaning. After the anode plate 32 is cleaned, its inner surface (the original dust-accumulated surface) is cleaned, while the outer surface (the current dust-accumulated surface) continues to collect dust. As the running time increases, when the weighing sensor 7 detects again that the total weight of the anode unit 3 exceeds the preset threshold, the controller will restart the drive unit 6, causing the anode plate 32 to rotate 180° again. At this time, the side that has been cleaned is moved back to the outside for dust collection, while the other side that has just completed dust collection on the outside is moved to the inside, and the pulse jet cleaning process of step S4 is repeated.

[0054] In summary, the above embodiments are as follows: by setting a hollow mounting box 31 with a mounting port 301 on the side wall, and rotatably mounting an anode plate 32 inside the mounting port 301, and setting a first air pipe 33 and a blowpipe 34 inside the mounting box 31, when dust removal is required, the dust collection surface of the anode plate 32 can be rotated into the mounting box 31 for pulse blow cleaning, and the stripped dust is confined to the closed mounting box 31 and falls, preventing the dust generated when the anode plate 32 is cleaned from being secondary entrained by the flue gas and flowing downstream.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A dust removal device for flue gas from a power generation boiler, characterized in that, include: A dust collection box (1) with a dust hopper (2) for collecting dust connected to its bottom; Multiple anode units (3) are arranged parallel to the direction of flue gas flow and located in the dust collector (1) shown. Multiple cathode rods (4) are provided on both sides of the anode unit (3) along the direction of flue gas flow. The anode unit (3) includes a mounting box (31), which is a hollow box with a ash discharge port (302) at the bottom. The bottom of the mounting box (31) extends into the ash hopper (2). Multiple mounting ports (301) are provided on both sides of the mounting box (31). An anode plate (32) is rotatably connected in each mounting port (301). Two drive units (6) are installed on the top of the mounting box (31) to drive the anode plates (32) on both sides to rotate, so that the two sides of the anode plate (32) can be flipped alternately. The installation box (31) is equipped with a plurality of horizontally arranged first air pipes (33) evenly distributed along the height direction. The top of the installation box (31) is equipped with an air supply unit that supplies air to the first air pipes (33). The first air pipes (33) are equipped with a plurality of blow pipes (34) facing the anode plate (32) for pulse blow cleaning of the anode plate (32).

2. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: The top of the ash hopper (2) is equipped with two symmetrically arranged baffles (21). The baffles (21) are provided with a lower clearance groove (201) corresponding to the mounting box (31). The bottom of the mounting box (31) extends into the ash hopper (2) from the lower clearance groove (201).

3. The flue gas dust removal equipment for power generation boilers according to claim 2, characterized in that: Two flip motors (22) are fixed on the outside of the ash hopper (2). The output ends of the two flip motors (22) extend into the ash hopper (2) and are connected to the two baffles (21) respectively, for driving the baffles (21) to flip.

4. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: The top of the dust collection box (1) is fixed with a cover plate (11), and the cover plate (11) has an upper clearance groove (101) corresponding to the mounting box (31). The top of the mounting box (31) extends from the upper clearance groove (101) to the outer side of the top of the dust collection box (1).

5. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: The gas supply unit includes a gas tank (5) and a second gas pipe (51). The gas tank (5) is fixed to the top of the mounting box (31). One end of the second gas pipe (51) is connected to the gas tank (5), and the other end of the second gas pipe (51) extends into the mounting box (31). One end of the first gas pipe (33) is connected to the second gas pipe (51).

6. The flue gas dust removal equipment for power generation boilers according to claim 5, characterized in that: A pulse valve (35) is fixed at one end of the first air tube (33) that connects to the second air tube (51).

7. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: The drive unit (6) includes a drive shaft (61) and a geared motor (63). The drive shaft (61) is arranged along the distribution direction of the anode plates (32). The output shaft of the geared motor (63) is connected to the drive shaft (61) and is used to drive the drive shaft (61) to rotate. A worm gear (62) corresponding to the number of anode plates (32) is coaxially arranged on the drive shaft (61). The top end of the anode plate (32) is fixed with a rotating shaft, and the anode plate (32) is rotatably connected to the mounting port (301) through the rotating shaft. The top end of the rotating shaft extends to the top of the mounting box (31) and is fixed with a worm gear (321). The worm (62) meshes with the worm gear (321).

8. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: Weighing sensors (7) are fixed at the four corners of the top of the mounting box (31). The mounting box (31) is connected to the cover plate (11) through the weighing sensors (7), so that the weighing sensors (7) can detect the weight of the anode unit (3) in real time.

9. The flue gas dust removal equipment for power generation boilers according to claim 1, characterized in that: The mounting box (31) is provided with V-shaped surfaces (311) at both ends to reduce the resistance to flue gas flow.

10. A method for removing dust from flue gas of a power generation boiler, comprising the power generation boiler flue gas dust removal equipment according to any one of claims 1-9, characterized in that: Includes the following steps: S1: Introduce the dust-laden flue gas into the dust collector (1) so that the flue gas flows in a direction parallel to the anode unit (3) and at the same time apply a high voltage DC electric field between the cathode rod (4) and the anode plate (32) so that the dust in the flue gas is charged under the action of the electric field force and adsorbed onto the surface of the anode plate (32). S2: The overall weight change of the anode unit (3) is detected in real time by the weighing sensors (7) fixed at the four corners of the top of the mounting box (31). When the detected weight exceeds the preset threshold, it is determined that a dust removal operation needs to be performed. S3: Start the drive unit (6), thereby driving the anode plate (32) to rotate 180° in the mounting port (301), so that the outer side of the anode plate (32) rotates into the mounting box (31), and correspondingly, the inner side rotates to the outer side, and the side that rotates to the outer side continues to collect dust. S4: The air supply unit supplies air to the multiple first air pipes (33) inside the installation box (31), and sprays it in a pulse manner through the blow pipe (34) onto the inner surface of the anode plate (32). The airflow impacts and peels off some of the dust attached to the anode plate (32). The dust falls along the inside of the installation box (31) and falls into the ash hopper (2) from the bottom ash outlet (302), completing one dust removal. S5: When the weighing sensor (7) detects that the total weight of the anode unit (3) exceeds the preset threshold, the anode plate (32) is rotated again, so that the side that has been cleaned is moved to the outside to collect dust, and the other side that was originally collected dust is moved to the inside, and the dust is cleaned by jetting again.

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