A dust removal device for exhaust gas from a coal-fired power generation unit

Abstract

The application provides a tail gas dust removal device of a coal-fired power generating unit, and belongs to the technical field of tail gas dust removal of coal-fired power generating units.The tail gas dust removal device of the coal-fired power generating unit comprises a purification box, an air inlet pipe, a first air outlet pipe, a spraying mechanism for dust setting of dust in tail gas, a first cleaning structure arranged in the air inlet pipe and used for cleaning dust on the inner wall thereof, a second air outlet pipe communicated with the top of the purification box, a driving structure arranged in the second air outlet pipe, and a filter plate arranged in the purification box and used for filtering.The filter screen plate can be switched, and after switching, the surface of the switched filter screen plate can be cleaned, so that the switched filter screen plate is convenient for next switching and use, and dust adhered to the inner wall of the air inlet pipe can be cleaned, thereby reducing the entry of dust and further improving the dust removal effect.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas dust removal technology for coal-fired power generation units, and specifically to an exhaust gas dust removal device, particularly an exhaust gas dust removal device for coal-fired power generation units. Background Technology

[0002] A coal-fired power generation unit is a mechanical device that converts the chemical energy of fossil fuels such as coal into electrical energy. It mainly consists of a combustion system (centered on a boiler), a steam-water system (primarily composed of various pumps, feedwater heaters, condensers, pipelines, water-cooled walls, etc.), an electrical system (mainly consisting of a steam turbine generator and a main transformer), and a control system. The first two generate high-temperature, high-pressure steam; the electrical system realizes the conversion of thermal and mechanical energy into electrical energy; and the control system ensures the safe, efficient, and economical operation of all systems.

[0003] During operation, coal-fired power generating units produce a large amount of exhaust gas containing a significant amount of solid particles. These particles can easily affect air quality and contribute to smog. Direct emission of exhaust gas can severely pollute the environment. To prevent indiscriminate emission of exhaust gas, filters are typically used to remove dust from the exhaust gas. However, these filters require cleaning after prolonged use. The cleaning process necessitates stopping the operation of the device, which reduces the efficiency of subsequent dust removal. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a dust removal device for the exhaust gas of a coal-fired power generation unit. This device can switch filter screens and clean the surface of the switched filter screens after switching, thus facilitating the next switching. It can also clean the dust adhering to the inner wall of the air inlet pipe, thereby reducing dust entry and further improving the dust removal effect.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A dust removal device for exhaust gas from a coal-fired power generation unit includes a purification box, an inlet pipe, a first exhaust pipe, and a spraying mechanism for suppressing dust in the exhaust gas. It also includes:

[0007] A first cleaning structure is disposed inside the air intake pipe and used to clean the dust on its inner wall;

[0008] A second exhaust pipe is connected to the top of the purification box. The second exhaust pipe is equipped with a drive structure. The purification box is equipped with a filter plate for filtration. The filter plate is circular and has two filter surfaces, one inside the purification box and one inside the cleaning box.

[0009] A rotating mechanism located at the top of the cleaning box and used to drive the filter plate to rotate;

[0010] A second cleaning structure is disposed inside the cleaning box and is used to clean impurities filtered from the surface of the filter plate;

[0011] A first transmission structure is installed on the back of the purification box and can drive the second cleaning structure to move through the drive structure.

[0012] A second transmission structure is disposed on the surface of the purification box and is capable of driving the first cleaning structure to clean the inside of the air intake pipe through the transmission of the first transmission structure.

[0013] A sealing structure located at the top of the inner cavity of the purification chamber and used to seal the first exhaust pipe and the second exhaust pipe.

[0014] The working principle of this invention is as follows: In use, the exhaust end of the coal-fired generator is first connected to the intake pipe, so that the exhaust gas enters the interior of the purification box through the intake pipe. After the exhaust gas enters the purification box, the impurities in the exhaust gas can be reduced by the spraying mechanism, and the water source will fall into the bottom of the purification box through the filter plate for continued use. Before exhausting, the bottom end of the first exhaust pipe can be sealed by the sealing structure, so that the filtered exhaust gas is discharged through the first exhaust pipe. When switching cleaning, the first exhaust pipe can be sealed again by the sealing structure, so that the exhaust gas is discharged from the second exhaust pipe. When the exhaust gas is discharged, it will generate airflow, so that the drive structure has a drive source. Through the transmission of the first transmission structure, it can not only drive the second cleaning structure to clean the surface of the filter plate inside the cleaning box, but also drive the second transmission structure to drive the first cleaning structure to scrape and clean the dust on the inner wall of the intake pipe.

[0015] The first cleaning structure includes a first reciprocating screw, a cleaning disc, a first bevel gear, and a second bevel gear. The first reciprocating screw is rotatably connected inside the intake pipe. The cleaning disc is fixed on a movable block that moves on the surface of the first reciprocating screw. The first bevel gear is fixed to one end of the first reciprocating screw, and the first bevel gear and the second bevel gear mesh with each other.

[0016] The above structure allows for the cleaning of impurities from the inner wall of the intake pipe.

[0017] The drive structure includes a fan blade, a rotating rod, a third bevel gear, a fourth bevel gear, and a straight rod. The rotating rod is rotatably connected inside the second exhaust pipe via a connecting plate. One end of the rotating rod is fixed to the connecting shaft of the fan blade. One side of the third bevel gear is fixed to the other end of the rotating rod. The fourth bevel gear meshes with the third bevel gear. The surface of the straight rod is rotatably connected to the interior of the rear end of the second exhaust pipe. One end of the straight rod is fixed to one side of the fourth bevel gear.

[0018] The above structure enables the exhaust gas to generate a driving source during emission, facilitating subsequent driving.

[0019] The first transmission structure includes a driving wheel, a driven wheel, a first movable rod, a fifth bevel gear, a sixth bevel gear, and a second movable rod. The driving wheel is fixed to the other end of the straight rod. The driving wheel is connected to the driven wheel via a belt. The interior of the driven wheel is fixed to the surface of the first movable rod. One end of the first movable rod is fixed to the interior of the fifth bevel gear. The surface of the fifth bevel gear meshes with the sixth bevel gear. The interior of the sixth bevel gear is fixed to one end of the second movable rod.

[0020] With the above structure, the drive structure can drive the first transmission structure to transmit power, so as to drive the second cleaning structure in the future.

[0021] The second cleaning structure includes a second reciprocating screw, a seventh bevel gear, an eighth bevel gear, a fixed plate, and a cleaning plate. The second reciprocating screw rotates inside the cleaning box. The surface of the second reciprocating screw is fixed to the interior of the seventh bevel gear. The top of the eighth bevel gear is fixed to the other end of the second movable rod. The eighth bevel gear meshes with the seventh bevel gear. The bottom of the second reciprocating screw is fixed to the fixed plate. The two sides of the fixed plate and the cleaning plate are connected by an elastic mechanism.

[0022] Using the above structure, impurities on the surface can be cleaned.

[0023] The sealing structure includes a motor, a connecting rod, a ninth bevel gear, a tenth bevel gear, a rotating shaft, and a sealing plate. The motor is fixed to the top of the back of the purification chamber. The output shaft of the motor is fixed to one side of the connecting rod. The other end of the connecting rod extends into the interior of the purification chamber and is fixed to one side of the ninth bevel gear. The ninth bevel gear meshes with the tenth bevel gear. The interior of the tenth bevel gear is fixed to the surface of the rotating shaft. The other end of the rotating shaft is rotatably connected to the top of the inner cavity of the purification chamber. The sealing plate is fixed to the surface of the rotating shaft and seals one end of the first exhaust pipe.

[0024] The above structure facilitates the sealing of the first or second exhaust pipe.

[0025] The second transmission structure includes an eleventh bevel gear, a twelfth bevel gear, a third movable rod, a thirteenth bevel gear, a fourteenth bevel gear, and a fourth movable rod. One side of the eleventh bevel gear is fixed to the other end of the first movable rod. The eleventh bevel gear meshes with the twelfth bevel gear. One side of the twelfth bevel gear is fixed to one end of the third movable rod. The other end of the third movable rod is fixed to one side of the thirteenth bevel gear. The thirteenth bevel gear is fixed to one end of the fourteenth bevel gear. One side of the fourteenth bevel gear is fixed to the fourth movable rod. The other end of the fourth movable rod extends into the interior of the intake pipe and is fixed to one side of the second bevel gear.

[0026] With the above structure, the transmission of the first transmission structure can drive the second transmission structure to drive together, so as to facilitate the subsequent driving of the first cleaning structure.

[0027] Each of the inner chambers of the purification box has a limiting plate fixed at the rear of the top side for limiting the position of the sealing plate.

[0028] The above structure facilitates the limiting of the rotating sealing plate.

[0029] The back of the cleaning box is equipped with a collection hopper for recovering the cleaned impurity particles, and the inside of the cleaning box is movably connected to a collection box for collecting the impurity particles.

[0030] Using the above structure, impurities from surface cleaning can be collected.

[0031] Both sides of the bottom of the air intake pipe are connected to a storage box, and the inside of the storage box is a dust collection box for collecting impurities.

[0032] The above structure allows for the collection of impurities cleaned from the inner wall of the intake pipe.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. The present invention uses a double-sided filtration system between the purification box and the cleaning box. After filtration is completed on one side, the other side can be switched for use. This allows the device to clean the surface of the object through the second cleaning structure without stopping operation, which not only reduces the workload of the staff but also improves the efficiency of dust removal.

[0035] 2. By setting up the first cleaning structure, when the second exhaust pipe is venting, the first cleaning structure can be driven to reciprocate inside the intake pipe through the cooperation of the drive structure, the first transmission structure and the second transmission structure, thereby facilitating the cleaning of dust adsorbed on the inner wall of the intake pipe and improving the subsequent dust removal effect.

[0036] 3. By setting up a blocking structure, the present invention can block the second exhaust pipe before switching cleaning, thus effectively preventing the second cleaning structure from reciprocating during rotation through the drive structure and the first transmission structure, thereby improving the service life of the cleaning plate. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure in this invention;

[0038] Figure 2 This is a schematic diagram of the right-side structure in this invention;

[0039] Figure 3 This is a schematic diagram of the cross-sectional structure in this invention;

[0040] Figure 4 This is a partial cross-sectional structural diagram of the present invention;

[0041] Figure 5 This is a schematic diagram of the rear cross-sectional structure in this invention;

[0042] Figure 6 This is a partial structural diagram of the present invention;

[0043] Figure 7 For the present invention Figure 4 A magnified view of a section at point A in the middle;

[0044] Figure 8 For the present invention Figure 4 A magnified view of a section at point B in the middle.

[0045] In the diagram: 1. Purification box; 2. Cleaning box; 3. Air inlet pipe; 4. Spraying mechanism; 5. First exhaust pipe; 6. Second exhaust pipe; 7. First cleaning structure; 71. First reciprocating screw; 72. Cleaning disc; 73. First bevel gear; 74. Second bevel gear; 8. Drive structure; 81. Fan blade; 82. Rotating rod; 83. Third bevel gear; 84. Fourth bevel gear; 85. Straight rod; 9. First transmission structure; 91. Driving wheel; 92. Driven wheel; 93. First movable rod; 94. Fifth bevel gear; 95. Sixth bevel gear; 96. Second movable rod; 10. Second cleaning structure; 101. Second reciprocating screw; 102. 103. Seventh bevel gear; 104. Eighth bevel gear; 105. Fixing plate; 106. Cleaning plate; 11. Filter plate; 12. Collection hopper; 13. Collection box; 14. Storage box; 15. Dust collection box; 16. Rotating mechanism; 17. Sealing structure; 171. Motor; 172. Connecting rod; 173. Ninth bevel gear; 174. Tenth bevel gear; 175. Rotating shaft; 176. Sealing plate; 18. Limiting plate; 19. Second transmission structure; 191. Eleventh bevel gear; 192. Twelfth bevel gear; 193. Third movable rod; 194. Thirteenth bevel gear; 195. Fourteenth bevel gear; 196. Fourth movable rod. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-8As shown, the exhaust gas dust removal device of this coal-fired power generation unit includes a purification box 1, a cleaning box 2 fixed to the back of the purification box 1, an air inlet pipe 3 connected to the surface of the purification box 1, a first cleaning structure 7 for cleaning dust on its inner wall installed inside the air inlet pipe 3, a first exhaust pipe 5 and a second exhaust pipe 6 connected to the two sides of the top of the purification box 1 respectively, a filter plate 11 for filtration installed inside the purification box 1, and a rotating mechanism 16 for rotating the filter plate 11 installed on the top of the cleaning box 2. The filter plate 11 is circular and has two filter surfaces, one inside the purification box 1 and one inside the cleaning box 2. A spraying mechanism 4 for dust suppression in exhaust gas is provided above the filter plate 11. A second cleaning structure 10 for cleaning impurities filtered from the surface of the filter plate 11 is provided inside the cleaning box 2. A drive structure 8 is provided inside the second exhaust pipe 6. A first transmission structure 9 drives the second cleaning structure 10 to move through the drive structure 8 on the back of the purification box 1. A second transmission structure 19 for cleaning the inside of the intake pipe 3 is provided on the surface of the purification box 1 through the transmission of the first transmission structure 9. A sealing structure 17 for sealing the first exhaust pipe 5 and the second exhaust pipe 6 is provided at the top of the inner cavity of the purification box 1.

[0048] The rotating mechanism 16 consists of a drive motor, two meshing bevel gear discs and a rotating column. The rotating column is fixed to the filter plate 11. Driven by the drive motor, the gear discs and rotating column rotate, which in turn drives the filter plate 11 to rotate, allowing the two filter surfaces of the filter plate 11 to be switched.

[0049] The first cleaning structure 7 includes a first reciprocating screw 71, a cleaning disc 72, a first bevel gear 73, and a second bevel gear 74. The first reciprocating screw 71 is rotatably connected inside the intake pipe 3. The cleaning disc 72 is fixed on a movable block that moves on the surface of the first reciprocating screw 71. The first bevel gear 73 is fixed to one end of the first reciprocating screw 71. The first bevel gear 73 and the second bevel gear 74 mesh with each other. Because the exhaust gas contains a lot of impurities, it flows inside the intake pipe 3 for a long time, causing a lot of impurities to be adsorbed on the inner wall of the intake pipe 3. At this time, the rotation of the first reciprocating screw 71 can drive the cleaning disc 72 to move back and forth on the surface of the first reciprocating screw 71, so that the cleaning disc 72 can scrape and clean the inner wall of the intake pipe 3, thereby facilitating subsequent use.

[0050] The drive structure 8 includes a fan blade 81, a rotating rod 82, a third bevel gear 83, a fourth bevel gear 84, and a straight rod 85. The rotating rod 82 is rotatably connected inside the second exhaust pipe 6 via a connecting plate. One end of the rotating rod 82 is fixed to the connecting shaft of the fan blade 81. One side of the third bevel gear 83 is fixed to the other end of the rotating rod 82. The fourth bevel gear 84 meshes with the third bevel gear 83. The surface of the straight rod 85 is rotatably connected to the interior of the rear end of the second exhaust pipe 6. One end of the straight rod 85 is fixed to one side of the fourth bevel gear 84. Thus, during exhaust, the airflow drives the fan blade 81 to rotate, which in turn drives the rotating rod 82 and the third bevel gear 83 to rotate, and also drives the fourth bevel gear 84 and the straight rod 85 to rotate, thereby saving energy.

[0051] The first transmission structure 9 includes a driving wheel 91, a driven wheel 92, a first movable rod 93, a fifth bevel gear 94, a sixth bevel gear 95, and a second movable rod 96. The driving wheel 91 is fixed to the other end of the straight rod 85. The driving wheel 91 is connected to the driven wheel 92 via a belt. The interior of the driven wheel 92 is fixed to the surface of the first movable rod 93. One end of the first movable rod 93 is fixed to the interior of the fifth bevel gear 94. The surface of the fifth bevel gear 94 meshes with the sixth bevel gear 95. The interior of the sixth bevel gear 95 is fixed to one end of the second movable rod 96. Thus, under the drive of the drive structure 8, the driving wheel 91 can be rotated, which in turn drives the driven wheel 92, the first movable rod 93, and the fifth bevel gear 94 to rotate, and also drives the sixth bevel gear 95 and the second movable rod 96 to rotate, so as to facilitate the subsequent cleaning of the filter plate 11 by the second cleaning structure 10.

[0052] The second cleaning structure 10 includes a second reciprocating screw 101, a seventh bevel gear 102, an eighth bevel gear 103, a fixed plate 104, and a cleaning plate 105. The second reciprocating screw 101 rotates inside the cleaning box 2. The surface of the second reciprocating screw 101 is fixed to the interior of the seventh bevel gear 102. The top of the eighth bevel gear 103 is fixed to the other end of the second movable rod 96. The eighth bevel gear 103 meshes with the seventh bevel gear 102. The bottom of the second reciprocating screw 101 is fixed to the fixed plate 104. The two sides of the fixed plate 104 and the cleaning plate 105 are connected by an elastic mechanism. Thus, under the transmission of the first transmission structure 9, the eighth bevel gear 103 can be driven to rotate, and the seventh bevel gear 102 and the second reciprocating screw 101 can be driven to rotate as well. At the same time, the fixed plate 104 and the cleaning plate 105 can be driven to reciprocate on the surface of the second reciprocating screw 101, thereby facilitating the cleaning of impurities on the surface of the filter plate 11.

[0053] The sealing structure 17 includes a motor 171, a connecting rod 172, a ninth bevel gear 173, a tenth bevel gear 174, a rotating shaft 175, and a sealing plate 176. The motor 171 is fixed to the top of the back of the purification chamber 1. The output shaft of the motor 171 is fixed to one side of the connecting rod 172. The other end of the connecting rod 172 extends into the interior of the purification chamber 1 and is fixed to one side of the ninth bevel gear 173. The ninth bevel gear 173 meshes with the tenth bevel gear 174. The interior of the tenth bevel gear 174 is fixed to the surface of the rotating shaft 175. The other end of the rotating shaft 175 is rotatably connected to the top of the inner cavity of the purification chamber 1. The sealing plate 176 is fixed to the rotating shaft. The surface of filter plate 175 is sealed to one end of the first exhaust pipe 5. When the filter plate 11 is rotated, the motor 171 can be started, which drives the connecting rod 172 and the ninth bevel gear 173 to rotate. At the same time, the tenth bevel gear 174, the rotating shaft 175 and the sealing plate 176 are rotated, so that the sealing plate 176 rotates to the bottom end of the second exhaust pipe 6 and seals it. This allows the exhaust gas discharged from the device to be discharged from the first exhaust pipe 5. At this time, the power source inside the second exhaust pipe 6 will be lost. Then the filter plate 11 can be rotated and switched to avoid the cleaning plate 105 constantly moving back and forth on its surface for cleaning when the filter plate 11 is rotating.

[0054] The second transmission structure 19 includes an eleventh bevel gear 191, a twelfth bevel gear 192, a third movable rod 193, a thirteenth bevel gear 194, a fourteenth bevel gear 195, and a fourth movable rod 196. One side of the eleventh bevel gear 191 is fixed to the other end of the first movable rod 193. The eleventh bevel gear 191 meshes with the twelfth bevel gear 192. One side of the twelfth bevel gear 192 is fixed to one end of the third movable rod 193. The other end of the third movable rod 193 is fixed to one side of the thirteenth bevel gear 194. The thirteenth bevel gear 194 meshes with the fourteenth bevel gear 196. One end of 5 is fixed, one side of the fourteenth bevel gear 195 is fixed to the fourth movable rod 196, and the other end of the fourth movable rod 196 extends into the interior of the intake pipe 3 and is fixed to one side of the second bevel gear 74. Under the transmission of the first transmission structure 9, the eleventh bevel gear 191 can be driven to rotate, and the twelfth bevel gear 192, the third movable rod 193 and the thirteenth bevel gear 194 can be driven to rotate, which in turn drives the fourteenth bevel gear 195, the fourth movable rod 196 and the second bevel gear 74 to rotate, thereby facilitating the first cleaning structure 7 to clean the inner wall of the intake pipe 3.

[0055] The rear of the top of the inner cavity of the purification box 1 is fixed with a limiting plate 18 for limiting the sealing plate 176. This allows the limiting plate 18 to stop precisely at the sealing position when rotating, thereby improving the sealing effect.

[0056] The back of the cleaning box 2 is provided with a collection hopper 12 for recycling the cleaned impurity particles. The inside of the cleaning box 2 is movably connected to a collection box 13 for collecting impurity particles. When the cleaning plate 105 scrapes the surface of the filter plate 11, it pushes the impurity particles into the collection hopper 12 and falls into the collection box 13 for unified collection and processing.

[0057] Both sides of the bottom of the air intake pipe 3 are connected to a storage box 14. The storage box 14 is equipped with a dust collection box 15 for collecting impurities. In this way, when the cleaning disc 72 scrapes and cleans the inner wall of the air intake pipe 3, the cleaned impurities can fall into the dust collection box 15 for collection.

[0058] The working principle of this invention is as follows: In use, the exhaust end of the coal-fired generator is first connected to the intake pipe 3, so that the exhaust gas enters the interior of the purification box 1 through the intake pipe 3. After the exhaust gas enters the interior of the purification box 1, the dust in the exhaust gas can be reduced by the spraying mechanism 4, and the water will fall into the bottom of the purification box 1 through the filter plate 11 for continued use. The impurity particles will adhere to the surface of the filter plate 11. Before exhausting, the bottom end of the first exhaust pipe 5 can be blocked by the sealing structure 17, so that the filtered exhaust gas can be discharged through the first exhaust pipe 5. When there are many impurities attached to the surface of the filter plate 11 inside the purification box 1, the filter plate 11 can be rotated by the rotating mechanism 16, so that the two filter surfaces of the filter plate 11 can be switched. After the switching is completed, filtration can continue. During filtration, the first exhaust pipe 5 can be sealed again by the sealing structure 17, so that the exhaust gas can be discharged from the second exhaust pipe 6. When the exhaust gas is discharged, it will generate airflow, so that the drive structure 8 has a drive source. Through the transmission of the first transmission structure 9, it can not only drive the second cleaning structure 10 to clean the surface of the filter plate 11 inside the cleaning box 2, but also drive the second transmission structure 19 to drive the first cleaning structure 7 to scrape and clean the dust on the inner wall of the air inlet pipe 3. The impurities cleaned on the surface of the filter plate 11 will fall into the collection box 13 through the collection hopper 12 for collection, while the impurities cleaned on the inner wall of the air inlet pipe 3 will fall into the dust collection box 15 through the storage box 14 for collection.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A dust removal device for tail gas of a coal-fired power generating unit, comprising a purification box (1), an air inlet pipe (3), a first air outlet pipe (5), and a spraying mechanism (4) for dust setting of dust in the tail gas, characterized in that, Also include: The first cleaning structure (7) is arranged in the interior of the air inlet pipe (3) and used for cleaning the dust on the inner wall thereof; The second exhaust pipe (6) is communicated with the top of the purification box (1), the interior of the second exhaust pipe (6) is provided with a driving structure (8), the interior of the purification box (1) is provided with a filter plate (11) used for filtering, the cross section of the filter plate (11) is circular, and the filter plate (11) is divided into two parts along the longitudinal section, one part is located in the interior of the purification box (1), and the other part is located in the interior of the cleaning box (2); The driving structure (8) comprises a fan blade (81), a rotating rod (82), a third bevel gear (83), a fourth bevel gear (84) and a straight rod (85), the rotating rod (82) is rotationally connected in the interior of the second exhaust pipe (6) through a connecting plate, one end of the rotating rod (82) is fixed at the connecting shaft position of the fan blade (81), one side of the third bevel gear (83) is fixed to the other end of the rotating rod (82), the fourth bevel gear (84) is engaged with the third bevel gear (83), the surface of the straight rod (85) is rotationally connected with the interior of the rear end of the second exhaust pipe (6), and one end of the straight rod (85) is fixed to one side of the fourth bevel gear (84); The rotating mechanism (16) is arranged at the top of the cleaning box (2) and used for driving the filter plate (11) to rotate; The second cleaning structure (10) is arranged in the interior of the cleaning box (2) and used for cleaning the impurities filtered on the surface of the filter plate (11); The first transmission structure (9) is arranged at the back of the purification box (1) and can drive the second cleaning structure (10) to move through the driving of the driving structure (8); The second transmission structure (19) is arranged on the surface of the purification box (1) and can drive the first cleaning structure (7) to clean the interior of the air inlet pipe (3) through the transmission of the first transmission structure (9); The blocking structure (17) is arranged at the top of the inner cavity of the purification box (1) and used for blocking the first exhaust pipe (5) and the second exhaust pipe (6).

2. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The first cleaning structure (7) comprises a first reciprocating wire rod (71), a cleaning disc (72), a first bevel gear (73) and a second bevel gear (74), the first reciprocating wire rod (71) is rotationally connected in the interior of the air inlet pipe (3), the cleaning disc (72) is fixed on the movable block moving on the surface of the first reciprocating wire rod (71), one end of the first reciprocating wire rod (71) is fixed with the first bevel gear (73), and the first bevel gear (73) and the second bevel gear (74) are engaged.

3. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The first transmission structure (9) comprises a driving wheel (91), a driven wheel (92), a first movable rod (93), a fifth bevel gear (94), a sixth bevel gear (95) and a second movable rod (96), the driving wheel (91) is fixed at the other end of the straight rod (85), the driving wheel (91) is in transmission connection between the belt and the driven wheel (92), the inside of the driven wheel (92) is fixed with the surface of the first movable rod (93), one end of the first movable rod (93) is fixed with the inside of the fifth bevel gear (94), the surface of the fifth bevel gear (94) is engaged with the sixth bevel gear (95), the inside of the sixth bevel gear (95) is fixed with one end of the second movable rod (96).

4. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 3, characterized in that: The second cleaning structure (10) comprises a second reciprocating screw rod (101), a seventh bevel gear (102), an eighth bevel gear (103), a fixed plate (104) and a cleaning plate (105), the second reciprocating screw rod (101) rotates in the inside of the cleaning box (2), the surface of the second reciprocating screw rod (101) is fixed with the inside of the seventh bevel gear (102), the top of the eighth bevel gear (103) is fixed with the other end of the second movable rod (96), the eighth bevel gear (103) is engaged with the seventh bevel gear (102), the bottom of the second reciprocating screw rod (101) is fixed with the fixed plate (104), the both sides between the fixed plate (104) and the cleaning plate (105) are connected through the elastic mechanism.

5. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The sealing structure (17) comprises a motor (171), a connecting rod (172), a ninth bevel gear (173), a tenth bevel gear (174), a rotating shaft (175) and a sealing plate (176), the motor (171) is fixed at the top of the back of the purification box (1), the output shaft of the motor (171) is fixed with one side of the connecting rod (172), the other end of the connecting rod (172) extends to the inside of the purification box (1) and is fixed with one side of the ninth bevel gear (173), the ninth bevel gear (173) is engaged with the tenth bevel gear (174), the inside of the tenth bevel gear (174) is fixed with the surface of the rotating shaft (175), the other end of the rotating shaft (175) is rotatably connected with the top of the inner cavity of the purification box (1), the sealing plate (176) is fixed on the surface of the rotating shaft (175) and seals one end of the first exhaust pipe (5).

6. A dust removal device for the exhaust gas of a coal-fired power generator set according to claim 2 or 3, characterized in that: The second transmission structure (19) comprises an eleventh bevel gear (191), a twelfth bevel gear (192), a third movable rod (193), a thirteenth bevel gear (194), a fourteenth bevel gear (195) and a fourth movable rod (196), one side of the eleventh bevel gear (191) is fixed with the other end of the first movable rod (93), the eleventh bevel gear (191) is engaged with the twelfth bevel gear (192), one side of the twelfth bevel gear (192) is fixed with one end of the third movable rod (193), the other end of the third movable rod (193) is fixed with one side of the thirteenth bevel gear (194), the thirteenth bevel gear (194) is fixed with one end of the fourteenth bevel gear (195), one side of the fourteenth bevel gear (195) is fixed with the fourth movable rod (196), the other end of the fourth movable rod (196) extends to the inside of the air inlet pipe (3) and is fixed with one side of the second bevel gear (74).

7. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The rear of the rear side of the inner cavity top of the purification box (1) is fixed with a limiting plate (18) for limiting the sealing plate (176).

8. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The back of the cleaning box (2) is provided with a collecting hopper (12) for recycling the impurity particles cleaned out, and the inside of the cleaning box (2) is movably connected with a collecting box (13) for collecting the impurity particles.

9. A device for removing dust from exhaust gas of a coal-fired power generator according to claim 1, characterized in that: The bottom of the air inlet pipe (3) is communicated with a storage box (14) on both sides, and the inside of the storage box (14) is provided with a dust collecting box (15) for collecting impurities.

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