Dust removal device for thermal power generation desulfurization tower

Abstract

The invention discloses a dust removal device for a thermal power generation desulfurization tower, and relates to the technical field of thermal power generation, the dust removal device comprises a tower body, a base is fixedly mounted on the circumferential surface of the tower body, an air inlet pipe fixedly penetrates through the tower body, a slag discharge valve fixedly penetrates through the bottom of the tower body, and the dust removal device further comprises a spraying device, a filtering device and a purifying device; wherein the spraying device comprises a motor, a rotating shaft, a water inlet pipe, a first rotating ring, a water spraying plate, a spraying head, a flow limiting plate, a first spring and a fixing block, the motor is fixedly installed at the bottom of the tower body, the rotating shaft is fixedly installed at the output end of the motor, the water inlet pipe fixedly penetrates through the tower body, and the first rotating ring is rotatably installed on the circumferential surface of the water inlet pipe; the rotating shaft fixedly penetrates through the first rotating ring, the water spraying plate fixedly penetrates through the first rotating ring, and smoke is comprehensively and uniformly sprayed through rotation of the rotating shaft and the water spraying plate, so that particulate matters in the smoke are more effectively removed.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and specifically to a dust removal device for a desulfurization tower in thermal power generation. Background Art

[0002] With the increasingly strict environmental protection standards, thermal power plants must adopt advanced dust removal and desulfurization technologies to reduce environmental pollution. Especially in some regions with strict environmental protection policies such as China, desulfurization towers and their dust removal devices in thermal power plants have become essential facilities, and their emission standards are gradually increasing.

[0003] The patent with the patent publication number CN220531127U relates to a dust removal device for a desulfurization tower in thermal power generation. A plurality of the support blocks are fixedly installed inside the tower body. A grid frame is fixedly installed above the plurality of support blocks. The feed pipe is fixedly installed inside the tower body. The water supply pipe is fixedly connected above the tower body. The lower end of the water supply pipe is fixedly connected with a plurality of spray heads. One end of the water supply pipe is fixedly installed with a water pump. In this dust removal device for a desulfurization tower in thermal power generation, the rising smoke and dust will pass through the gravel particle layer above the grid frame, and then the dust will be left inside the gravel particle layer. The water pump pumps external clear water and sprays it again through the spray heads. The gravel particles are used to filter and adsorb the dust in the high-temperature smoke and dust in thermal power generation, and it can be carried out at a higher temperature without damaging the pulse filter cloth dust collector, thus making the dust removal effect of the dust removal device for a desulfurization tower in thermal power generation better.

[0004] In the above patent, the rising smoke and dust will pass through the gravel particle layer above the grid frame, and then the dust will be left inside the gravel particle layer. The water pump pumps external clear water and sprays it again through the spray heads. The gravel particles are used to filter and adsorb the dust in the high-temperature smoke and dust in thermal power generation. However, it is difficult to spray evenly and comprehensively when the spray heads are spraying water, resulting in excessive slurry spraying amount in some areas inside the desulfurization tower, while insufficient spraying in other areas. At the same time, it is difficult to control the speed of the flue gas entering the inside of the desulfurization tower, resulting in too short contact time between the water sprayed by the spray heads and the flue gas, and thus reducing the dust removal effect. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dust removal device for a desulfurization tower in thermal power generation, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A dust removal device for a desulfurization tower in thermal power generation, including a tower body. A base is fixedly installed on the circumferential surface of the tower body. An air inlet pipe penetrates through the tower body fixedly. A slag discharge valve penetrates through the bottom of the tower body fixedly. It also includes a spraying device, a filtering device, and a purification device. Among them, the spraying device includes a motor, a rotating shaft, a water inlet pipe, a first rotating ring, a water spraying plate, a spray head, a flow limiting plate, a first spring, and a fixing block. The motor is fixedly installed at the bottom of the tower body. The rotating shaft is fixedly installed at the output end of the motor. The water inlet pipe penetrates through the tower body fixedly. The first rotating ring is rotatably installed on the circumferential surface of the water inlet pipe. The rotating shaft penetrates through the first rotating ring fixedly. The water spraying plate penetrates through the first rotating ring fixedly. The spray head penetrates through the water spraying plate fixedly. The flow limiting plate is slidably installed on the inner wall of the tower body. The fixing block is fixedly installed at the bottom of the inner wall of the tower body. A first spring is arranged between the fixing block and the flow limiting plate. When the motor starts, it drives the rotating shaft to rotate. The rotation of the rotating shaft drives the first rotating ring to rotate. The rotation of the first rotating ring drives the water spraying plate to rotate. The rotation of the water spraying plate drives the spray head to rotate.

[0007] According to the above technical solution, the rotating shaft rotates through the water inlet pipe. The top of the flow limiting plate is a first inclined surface. There are two fixing blocks. The two fixing blocks are symmetrically distributed with the center of the flow limiting plate. There are two first springs. The two first springs are symmetrically distributed with the center of the flow limiting plate, which is convenient for squeezing the flow limiting plate, thereby controlling the rising speed of the flue gas entering the desulfurization tower and facilitating the reset of the flow limiting plate.

[0008] According to the above technical solution, the filtering device includes a filter plate, a second rotating ring, a rotating rod, a third rotating ring, a roller, a connecting shaft, and a soft brush. The filter plate is slidably installed on the inner wall of the tower body. The second rotating ring is slidably installed on the circumferential surface of the rotating shaft. The third rotating ring is rotatably installed on the circumferential surface of the second rotating ring. The roller is rotatably installed on the circumferential surface of the rotating rod. One end of the connecting shaft is fixedly installed on the side of the roller close to the third rotating ring. The other end of the connecting shaft is fixedly connected to the side of the third rotating ring close to the roller. The soft brush is fixedly installed on the circumferential surface of the third rotating ring. The rotation of the second rotating ring drives the rotating rod to rotate. The rotation of the rotating rod drives the third rotating ring to rotate. The rotation of the third rotating ring drives the soft brush to rotate, cleaning the surface of the filter plate to prevent the filter plate from being blocked.

[0009] According to the above technical solution, the filtering device further includes a fourth rotating ring, a pressing rod, and an inclined surface block. The fourth rotating ring is fixedly installed on the circumferential surface of the rotating shaft. The pressing rod is fixedly installed on the circumferential surface of the fourth rotating ring. The inclined surface block is fixedly installed on the top of the filter plate. The rotation of the rotating shaft drives the fourth rotating ring to rotate. The rotation of the fourth rotating ring drives the pressing rod to rotate. The rotation of the pressing rod contacts and presses the inclined surface block, and the inclined surface block moves downward under the pressing force.

[0010] A dust removal device for a desulfurization tower in thermal power generation according to the claim, characterized in that: the rotating shaft rotates through the filter plate, and the second rotating ring is rotatably connected to the bottom of the filter plate, facilitating the continuous contact between the second rotating ring and the filter plate to clean the surface of the filter plate.

[0011] According to the above technical solution, the purification device includes an activated carbon adsorption box, a circular ring and fan blades. The activated carbon adsorption box is slidably installed on the inner wall of the tower body. The circular ring is fixedly installed on the circumferential surface of the rotating shaft, and the fan blades are fixedly installed on the circumferential surface of the circular ring. The rotation of the rotating shaft drives the circular ring to rotate, and the rotation of the circular ring drives the fan blades to rotate, stirring the activated carbon inside the activated carbon adsorption box.

[0012] According to the above technical solution, the purification device further includes a vertical rod, an arc-shaped rod, a square plate and a second spring. One end of the vertical rod is fixedly installed on the top of the filter plate, and the other end of the vertical rod is fixedly connected to the bottom of the activated carbon adsorption box. The arc-shaped rod is fixedly installed on the inner wall of the tower body, and the square plate is fixedly installed on the inner wall of the tower body. A second spring is arranged between the square plate and the activated carbon adsorption box. The downward movement of the filter plate drives the vertical rod to move downward, the downward movement of the vertical rod drives the activated carbon adsorption box to move downward, and the downward movement of the activated carbon adsorption box drives the activated carbon inside to move downward.

[0013] According to the above technical solution, the rotating shaft rotates through the activated carbon adsorption box. There are two square plates, and the two square plates are symmetrically distributed with the center of the activated carbon adsorption box as the center. There are two second springs, and the two second springs are symmetrically distributed with the center of the activated carbon adsorption box as the center, facilitating the reset and vibration of the activated carbon adsorption box to improve the adsorption efficiency of the activated carbon.

[0014] The present invention provides a dust removal device for a desulfurization tower in thermal power generation. It has the following beneficial effects: In this invention, when the flue gas needs to be treated, the motor starts to drive the water spraying plate and the spray head to rotate, increasing the contact area between the flue gas and water, better dust removal of the flue gas, and at the same time, the flue gas can be sprayed comprehensively and evenly, so as to more effectively remove the particulate matter in the flue gas. At the same time, the rotation of the water spraying plate squeezes the flow limiting plate, and the flow limiting plate blocks the air inlet pipe, controlling the speed of the flue gas entering the desulfurization tower, thereby controlling the rising speed of the flue gas, making the contact time between water and the flue gas longer, and thus improving the separation effect of the flue gas.

[0015] In this invention, the flue gas is secondarily filtered through a filter plate to prevent particulate matter in the flue gas from being discharged into the air, causing serious air pollution. At the same time, a rotating rod and a soft brush are used to clean the surface of the filter plate to prevent the filter plate from being blocked, which affects the air circulation and thus reduces the desulfurization efficiency. At the same time, the third rotating ring is driven to reverse by the friction between the roller and the filter plate, better cleaning the surface of the filter plate and improving the air circulation. The filter plate is moved downward by the extrusion rod and the inclined block, increasing the contact area with the flue gas and at the same time refluxing the flue gas, better separating the particulate matter in the flue gas, thereby improving the separation effect of the flue gas.

[0016] In this invention, harmful gases in the flue gas are adsorbed by an activated carbon adsorption box to prevent the harmful gases in the flue gas from being discharged into the air and polluting the air. At the same time, the rotating shaft drives the fan blades to rotate, stirring the activated carbon in the activated carbon adsorption box, making the activated carbon fully contact with the flue gas, better purifying the harmful gases in the flue gas. At the same time, when the filter plate moves downward, it drives the activated carbon adsorption box to move downward through the vertical rod, causing the activated carbon inside the activated carbon adsorption box to be stirred up and down. At the same time, the elastic force of the second spring makes the activated carbon adsorption box move upward to contact and vibrate with the arc-shaped rod. By stirring the activated carbon up and down and vibrating it, the contact area between the activated carbon and the flue gas is increased, the adsorption efficiency of the activated carbon is improved, and the harmful gases in the flue gas are better purified, preventing the harmful gases from being discharged into the atmosphere and causing serious air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic sectional structure diagram of the tower body of the present invention; Figure 3 is a schematic position structure diagram of the water spraying plate and the flow limiting plate of the present invention; Figure 4 is a schematic position structure diagram of the filter plate and the soft brush of the present invention; Figure 5 is of the present invention Figure 4 magnified schematic diagram of A; Figure 6 is a schematic position structure diagram of the extrusion rod and the inclined block of the present invention; Figure 7 is a schematic structure diagram of the arc-shaped rod and the tower body of the present invention; Figure 8 is a schematic position structure diagram of the vertical rod and the activated carbon adsorption box of the present invention.

[0018] In the figure: 1. Tower body; 2. Base; 3. Air inlet pipe; 4. Slag discharge valve; 51. Motor; 52. Rotating shaft; 53. Water inlet pipe; 54. First rotating ring; 55. Spraying plate; 56. Nozzle; 57. Flow limiting plate; 58. First spring; 59. Fixed block; 61. Filter plate; 62. Second rotating ring; 63. Rotating rod; 64. Third rotating ring; 65. Roller; 66. Connecting shaft; 67. Soft brush; 68. Fourth rotating ring; 69. Extrusion rod; 610. Inclined plane block; 71. Activated carbon adsorption box; 72. Ring; 73. Fan blade; 74. Vertical rod; 75. Arc rod; 76. Square plate; 77. Second spring. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-8 , an embodiment of the present invention is: a dust removal device for a flue gas desulfurization tower in thermal power generation, including a tower body 1, a base 2 is fixedly installed on the circumferential surface of the tower body 1, an air inlet pipe 3 is fixedly penetrated through the tower body 1, and a slag discharge valve 4 is fixedly penetrated through the bottom of the tower body 1. Among them, the spraying device includes a motor 51, a rotating shaft 52, a water inlet pipe 53, a first rotating ring 54, a spraying plate 55, a nozzle 56, a flow limiting plate 57, a first spring 58 and a fixed block 59. The motor 51 is fixedly installed at the bottom of the tower body 1, the rotating shaft 52 is fixedly installed at the output end of the motor 51, the water inlet pipe 53 is fixedly penetrated through the tower body 1, the first rotating ring 54 is rotatably installed on the circumferential surface of the water inlet pipe 53, the rotating shaft 52 is fixedly penetrated through the first rotating ring 54, the spraying plate 55 is fixedly penetrated through the first rotating ring 54, the nozzle 56 is fixedly penetrated through the spraying plate 55, the flow limiting plate 57 is slidably installed on the inner wall of the tower body 1, the fixed block 59 is fixedly installed at the bottom of the inner wall of the tower body 1, and a first spring 58 is arranged between the fixed block 59 and the flow limiting plate 57. The spraying plate 55 is driven to rotate by the rotating shaft 52 to spray the flue gas comprehensively and evenly, so as to better separate the particulate matter in the flue gas. At the same time, the speed of the flue gas entering the desulfurization tower is controlled by the flow limiting plate 57, so that the contact time between the spray and the flue gas is longer, and the separation effect on the flue gas is improved.

[0021] The rotating shaft 52 rotates through the water inlet pipe 53. The top of the flow limiting plate 57 is a first inclined surface. There are two fixed blocks 59, and the two fixed blocks 59 are symmetrically distributed with the center of the flow limiting plate 57 as the center. There are two first springs 58, and the two first springs 58 are symmetrically distributed with the center of the flow limiting plate 57 as the center, which is convenient for squeezing the flow limiting plate 57, thereby controlling the rising speed of the flue gas entering the desulfurization tower and facilitating the reset of the flow limiting plate 57.

[0022] During the operation of this embodiment: When it is necessary to treat flue gas, the flue gas is pumped into the interior of the tower body 1 through the intake pipe 3. At the same time, the motor 51 is started. The start of the motor 51 drives the rotation of the rotating shaft 52. The rotation of the rotating shaft 52 drives the rotation of the first rotating ring 54. The rotation of the first rotating ring 54 drives the rotation of the water spraying plate 55. The rotation of the water spraying plate 55 drives the rotation of the spray head 56, uniformly spraying the flue gas, increasing the contact area between the flue gas and water, thereby effectively separating the particulate matter in the flue gas. At the same time, the rotation of the water spraying plate 55 contacts and presses the flow limiting plate 57. The flow limiting plate 57 moves downward under the extrusion force, blocking the intake pipe 3, thereby controlling the rising speed of the flue gas entering the desulfurization tower, making the contact time between the spray and the flue gas longer, and thus improving the separation effect of the flue gas.

[0023] Please refer to Figures 1-8 , on the basis of the above embodiment, in another embodiment of the present invention, it further includes a filtering device and a purification device; the filtering device includes a filter plate 61, a second rotating ring 62, a rotating rod 63, a third rotating ring 64, a roller 65, a connecting shaft 66 and a soft brush 67. The filter plate 61 is slidably installed on the inner wall of the tower body 1. The second rotating ring 62 is slidably installed on the circumferential surface of the rotating shaft 52. The third rotating ring 64 is rotatably installed on the circumferential surface of the second rotating ring 62. The roller 65 is rotatably installed on the circumferential surface of the rotating rod 63. One end of the connecting shaft 66 is fixedly installed on the side of the roller 65 close to the third rotating ring 64. The other end of the connecting shaft 66 is fixedly connected to the side of the third rotating ring 64 close to the roller 65. The soft brush 67 is fixedly installed on the circumferential surface of the third rotating ring 64, performing secondary filtration on the flue gas, preventing the particulate matter in the flue gas from being discharged into the atmosphere and causing air pollution. At the same time, the surface of the filter plate 61 is cleaned by the soft brush 67, preventing the filter plate 61 from being blocked and affecting air circulation, thereby reducing the dust removal effect on the flue gas.

[0024] The filtering device further includes a fourth rotating ring 68, an extrusion rod 69 and an inclined surface block 610. The fourth rotating ring 68 is fixedly installed on the circumferential surface of the rotating shaft 52. The extrusion rod 69 is fixedly installed on the circumferential surface of the fourth rotating ring 68. The inclined surface block 610 is fixedly installed on the top of the filter plate 61. By the extrusion rod 69 extruding the inclined surface block 610, the filter plate 61 moves downward, increasing the contact area between the filter plate 61 and the flue gas, better separating the particulate matter in the flue gas, and improving the separation effect of the flue gas.

[0025] The rotating shaft 52 rotates through the filter plate 61, and the second rotating ring 62 is rotatably connected to the bottom of the filter plate 61, facilitating the second rotating ring 62 to always contact the filter plate 61 and clean the surface of the filter plate 61.

[0026] The purification device includes an activated carbon adsorption box 71, a circular ring 72 and a fan blade 73. The activated carbon adsorption box 71 is slidably installed on the inner wall of the tower body 1. The circular ring 72 is fixedly installed on the circumferential surface of the rotating shaft 52, and the fan blade 73 is fixedly installed on the circumferential surface of the circular ring 72, which adsorbs harmful gases in the flue gas to prevent the harmful gases from being discharged into the atmosphere. The activated carbon is stirred by the fan blade 73, so that the activated carbon fully contacts the flue gas, and the harmful gases in the flue gas can be better adsorbed.

[0027] The purification device further includes a vertical rod 74, an arc-shaped rod 75, a square plate 76 and a second spring 77. One end of the vertical rod 74 is fixedly installed on the top of the filter plate 61, and the other end of the vertical rod 74 is fixedly connected to the bottom of the activated carbon adsorption box 71. The arc-shaped rod 75 is fixedly installed on the inner wall of the tower body 1, and the square plate 76 is fixedly installed on the inner wall of the tower body 1. A second spring 77 is arranged between the square plate 76 and the activated carbon adsorption box 71. The activated carbon adsorption box 71 is driven to move up and down by the vertical rod 74, so that the fan blade 73 stirs the activated carbon up and down, increasing the contact area between the activated carbon and the flue gas, improving the adsorption efficiency of the activated carbon, and better purifying the flue gas.

[0028] The rotating shaft 52 rotates through the activated carbon adsorption box 71. There are two square plates 76, and the two square plates 76 are symmetrically distributed with the center of the activated carbon adsorption box 71 as the center. There are two second springs 77, and the two second springs 77 are symmetrically distributed with the center of the activated carbon adsorption box 71 as the center, which facilitates the reset and vibration of the activated carbon adsorption box 71 and improves the adsorption efficiency of the activated carbon.

[0029] After the flue gas is separated by spraying, it continues to move upward. The upward-moving flue gas contacts the filter plate 61. The filter plate 61 performs secondary filtration on the flue gas, filtering the particulate matter in the flue gas to prevent the particulate matter from being discharged into the atmosphere and causing serious pollution to the air. At the same time, the rotation of the rotating shaft 52 drives the rotation of the second rotating ring 62. The rotation of the second rotating ring 62 drives the rotation of the rotating rod 63. The rotation of the rotating rod 63 drives the rotation of the third rotating ring 64. The rotation of the third rotating ring 64 drives the rotation of the soft brush 67 to clean the surface of the filter plate 61, preventing the filter plate 61 from being blocked, affecting the air circulation, and reducing the separation effect. At the same time, the rotation of the rotating rod 63 drives the movement of the roller 65. The movement of the roller 65 contacts the filter plate 61 to generate friction. The friction of the roller 65 causes it to rotate in reverse. The reverse rotation of the roller 65 drives the reverse rotation of the third rotating ring 64. The reverse rotation of the third rotating ring 64 drives the reverse rotation of the soft brush 67 to better clean the surface of the filter plate 61, preventing the filter plate 61 from being blocked, improving the air circulation, preventing the internal pressure of the desulfurization tower from being too high, and reducing the desulfurization effect. At the same time, the rotation of the rotating shaft 52 drives the rotation of the fourth rotating ring 68. The rotation of the fourth rotating ring 68 drives the rotation of the extrusion rod 69. The rotation of the extrusion rod 69 contacts and squeezes the inclined block 610. The inclined block 610 moves downward under the extrusion force. The downward movement of the inclined block 610 drives the downward movement of the filter plate 61, increasing the contact area between the filter plate 61 and the flue gas, and at the same time refluxing the flue gas to better separate the particulate matter in the flue gas, thereby improving the separation effect of the flue gas.

[0030] After the flue gas is filtered by the filter plate 61, it continues to move upward and contacts the activated carbon adsorption box 71. The activated carbon adsorption box 71 adsorbs and purifies the harmful gases in the flue gas to prevent the harmful gases from being discharged into the atmosphere, polluting the air, and endangering human health. At the same time, the rotation of the rotating shaft 52 drives the rotation of the circular ring 72. The rotation of the circular ring 72 drives the rotation of the fan blades 73 to stir the activated carbon inside the activated carbon adsorption box 71, increasing the contact area between the activated carbon and the flue gas, and better purifying the harmful gases in the flue gas. At the same time, the downward movement of the filter plate 61 drives the downward movement of the vertical rod 74. The downward movement of the vertical rod 74 drives the downward movement of the activated carbon adsorption box 71. The downward movement of the activated carbon adsorption box 71 drives the downward movement of the activated carbon inside, causing the fan blades 73 to stir the activated carbon up and down. At the same time, the elastic force of the second spring 77 causes the activated carbon adsorption box 71 to move upward. The upward movement of the activated carbon adsorption box 71 contacts the arc-shaped rod 75 and generates vibration. Through the up-and-down stirring and vibration of the activated carbon, the activated carbon is in full contact with the flue gas, improving the activated carbon adsorption efficiency, and better purifying the harmful gases in the flue gas to prevent the harmful gases from being discharged into the atmosphere and causing serious air pollution.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for a desulfurization tower in thermal power generation, comprising a tower body, characterized in that: A base is fixedly installed on the circumferential surface of the tower body. An air inlet pipe is fixedly penetrated through the tower body. A slag discharge valve is fixedly penetrated through the bottom of the tower body. It further includes a spraying device, a filtering device and a purification device. Among them, the spraying device includes a motor, a rotating shaft, a water inlet pipe, a first rotating ring, a water spraying plate, a spray head, a flow limiting plate, a first spring and a fixing block. The motor is fixedly installed at the bottom of the tower body. The rotating shaft is fixedly installed at the output end of the motor. The water inlet pipe is fixedly penetrated through the tower body. The first rotating ring is rotatably installed on the circumferential surface of the water inlet pipe. The rotating shaft is fixedly penetrated through the first rotating ring. The water spraying plate is fixedly penetrated through the first rotating ring. The spray head is fixedly penetrated through the water spraying plate. The flow limiting plate is slidably installed on the inner wall of the tower body. The fixing block is fixedly installed at the bottom of the inner wall of the tower body. A first spring is arranged between the fixing block and the flow limiting plate.

2. The dust removal device for a desulfurization tower in thermal power generation according to claim 1, characterized in that: The rotating shaft rotatably penetrates through the water inlet pipe. The top of the flow limiting plate is a first inclined surface. There are two fixing blocks, and the two fixing blocks are symmetrically distributed with the center of the flow limiting plate as the center. There are two first springs, and the two first springs are symmetrically distributed with the center of the flow limiting plate as the center.

3. The dust removal device for a desulfurization tower in thermal power generation according to claim 2, characterized in that: The filtering device includes a filter plate, a second rotating ring, a rotating rod, a third rotating ring, a roller, a connecting shaft and a soft brush. The filter plate is slidably installed on the inner wall of the tower body. The second rotating ring is slidably installed on the circumferential surface of the rotating shaft. The third rotating ring is rotatably installed on the circumferential surface of the second rotating ring. The roller is rotatably installed on the circumferential surface of the rotating rod. One end of the connecting shaft is fixedly installed on the side of the roller close to the third rotating ring. The other end of the connecting shaft is fixedly connected to the side of the third rotating ring close to the roller. The soft brush is fixedly installed on the circumferential surface of the third rotating ring.

4. The dust removal device for a desulfurization tower in thermal power generation according to claim 3, characterized in that: The filtering device further includes a fourth rotating ring, a pressing rod and an inclined block. The fourth rotating ring is fixedly installed on the circumferential surface of the rotating shaft. The pressing rod is fixedly installed on the circumferential surface of the fourth rotating ring. The inclined block is fixedly installed on the top of the filter plate.

5. The dust removal device for a desulfurization tower in thermal power generation according to claim 4, characterized in that: The rotating shaft rotatably penetrates through the filter plate. The second rotating ring is rotatably connected to the bottom of the filter plate.

6. The dust removal device for a desulfurization tower in thermal power generation according to claim 5, characterized in that: The purification device includes an activated carbon adsorption box, a circular ring and a fan blade. The activated carbon adsorption box is slidably installed on the inner wall of the tower body. The circular ring is fixedly installed on the circumferential surface of the rotating shaft. The fan blade is fixedly installed on the circumferential surface of the circular ring.

7. The dust removal device for a desulfurization tower in thermal power generation according to claim 6, wherein: The purification device further includes a vertical rod, an arc-shaped rod, a square plate and a second spring. One end of the vertical rod is fixedly installed on the top of the filter plate. The other end of the vertical rod is fixedly connected to the bottom of the activated carbon adsorption box. The arc-shaped rod is fixedly installed on the inner wall of the tower body. The square plate is fixedly installed on the inner wall of the tower body. A second spring is arranged between the square plate and the activated carbon adsorption box.

8. The dust removal device for a desulfurization tower in thermal power generation according to claim 7, characterized in that: The rotating shaft rotatably penetrates through the activated carbon adsorption box. There are two square plates, and the two square plates are symmetrically distributed with the center of the activated carbon adsorption box as the center. There are two second springs, and the two second springs are symmetrically distributed with the center of the activated carbon adsorption box as the center.

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