Flue gas dust remover for thermal power plant

Abstract

The invention belongs to the technical field of air pollution treatment, and particularly relates to a thermal power plant flue gas dust remover which comprises a cloth bag dust removal box and an electrostatic dust removal box, and an air inlet and an air outlet are formed in the two ends of the electrostatic dust removal box respectively; the air inlet is communicated and fixedly connected to the top end of the cloth bag dust removal box through a communicating pipe; by arranging the dust removal mechanism, dust particles are captured by an anode plate, more dust particles are deposited on the anode plate after a period of time, and when dust removal is needed, a second motor is started, an output shaft of the second motor drives a disc to rotate, the disc drives a limiting column to rotate, and the limiting column drives a limiting block to move in the rotating process; the limiting block horizontally reciprocates under the constraint of the cross rod, the limiting block drives the moving plate to reciprocate, the moving plate drives the impact column to reciprocate, and the impact column regularly impacts on the filter plates and the anode plates, so that the functions of flapping and deashing the filter plates and the anode plates are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of air pollution control, in particular to a flue gas dust collector for a thermal power plant. Background Art

[0002] A dust collector is a flue gas purification and dust removal equipment used to treat industrial flue gas dust. It is mainly used to remove particulate dust, smelting escapes, aerosols and other pollutants and harmful substances in dust-containing bodies. It is an effective equipment for controlling air pollution. With the increasingly stringent environmental protection regulations and the gradual increase in fuel prices, higher requirements are placed on the emission standards of high-temperature flue gas in thermal power plants and energy conservation and consumption reduction in flue gas treatment.

[0003] A Chinese patent with publication number CN105689140B discloses a high-efficiency electrostatic precipitator, including a precipitator body, an inlet seal, an outlet seal and an ash hopper; a plurality of groups of electric field structures are arranged from the inlet end to the outlet end of the precipitator body, each group of electric field structures includes a plurality of groups of three-electrode breeze dust removal units arranged side by side, each group of three-electrode breeze dust removal units is composed of a cathode suspension and left and right louver plates and left and right anode plates; when the flue gas containing dust particles enters from the inlet of the precipitator body, it first enters the first group of electric field structures. The structure performs electrostatic precipitator, electric field A releases electrons, which attach to dust particles and make them negatively charged. Negatively charged dust particles pass through the louver plates at an extremely low speed, and charged or uncharged dust particles that are not captured pass through the louver plates and enter the electric field B. Electric field B releases electrons, which attach to dust particles and make them negatively charged. Under the action of electric field B, the negatively charged dust particles move along the electric field lines to the anode plate, are captured by the anode plate and deposited, and are finally discharged from the outlet of the dust collector body.

[0004] In the current existing technology, dust particles are captured by the anode plates. After a period of time, a large amount of dust particles are deposited on the anode plates. If they are not cleaned in time, excessive dust accumulation may lead to a decrease in dust removal efficiency; if the dust is cleaned too frequently, it may affect the capture effect.

[0005] To this end, the present invention provides a flue gas dust collector for a thermal power plant. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A flue gas dust collector for a thermal power plant described in the present invention includes a bag dust removal box and an electrostatic dust removal box. An air inlet and an exhaust outlet are respectively provided at both ends of the electrostatic dust removal box; the air inlet is connected and fixed to the top of the bag dust removal box through a connecting pipe; a cathode plate, a filter plate and an anode plate are successively fixed on the inner wall of the electrostatic dust removal box; a dust cleaning mechanism is provided in the electrostatic dust removal box. The dust cleaning mechanism includes a second motor fixed to the top of the electrostatic dust removal box. The output shaft of the second motor is rotationally connected to the electrostatic dust removal box through a bearing and is fixed with a disc; a limiting column is fixed to the bottom of the disc; four fixing blocks are fixed to the inner wall of the top of the electrostatic dust removal box. Cross bars are fixed to adjacent two of the fixing blocks. A limiting block is slidably connected to the two cross bars; the limiting column is slidably matched with the limiting block; a moving plate is fixed to the bottom of the limiting block, and a plurality of impact plates are fixed to the bottom of the moving plate. A plurality of impact columns are fixed to the side wall of the impact plate.

[0008] Preferably, a cleaning plate is provided between the gaps of the cathode plates; a connecting plate is fixed to the bottom end of the electrostatic dust removal box; a positive and negative thread lead screw is rotationally connected between the connecting plate and the inner wall of the top of the electrostatic dust removal box through a bearing. The cleaning plate is threadedly connected to the positive and negative thread lead screw; two vertical rods are fixed between the connecting plate and the inner wall of the top of the electrostatic dust removal box. The cleaning plate is slidably connected to the two vertical rods; a linkage mechanism is provided between the positive and negative thread lead screw and the second motor.

[0009] Preferably, the linkage mechanism includes a second runner fixed to the top end of the positive and negative thread lead screw; a first runner is fixed to the output shaft of the second motor. A belt is sleeved between the first runner and the second runner. The second motor is fixed to the top of the electrostatic dust removal box through an L-shaped plate.

[0010] Preferably, two second hoppers are fixed to the bottom of the electrostatic dust removal box. A second collection box is provided at the bottom of the two second hoppers; air delivery pipes are fixed to the inner walls of the top ends of the hoppers. A plurality of nozzles are installed at the bottoms of the air delivery pipes. Branch pipes are connected and fixed to the air delivery pipes. A main pipe is connected and fixed between the two branch pipes through a connector; the exhaust outlet is connected and fixed to an exhaust pipe, and a fan is installed on the exhaust pipe.

[0011] Preferably, two flow equalizing plates are fixed to the inner wall of the end of the electrostatic dust removal box close to the air inlet; the cathode plate is arranged at the end close to the flow equalizing plate; there are a plurality of filter plates, and the diameter of the filter holes gradually decreases from the cathode plate to the anode plate; there are a plurality of anode plates, and the area of the anode plate close to the exhaust outlet is larger than the area of the exhaust outlet.

[0012] Preferably, an air inlet pipe is connected and fixedly attached to the bottom of the end of the bag dust removal box away from the connecting pipe. One end of the air inlet pipe located inside the bag dust removal box is connected and fixedly attached to a protective cover. A rotating rod is provided inside the protective cover. A driving mechanism is provided at one end of the rotating rod. Two cyclone fans are provided on the rotating rod. A filter screen is installed at the end of the protective cover away from the air inlet pipe. Two scraping plates are fixedly attached to the rotating rod, and the scraping plates are in contact with the surface of the filter screen; two scraping rods are fixedly attached to the rotating rod, and the scraping rods are in contact with the inner wall of the protective cover; a blanking pipe is connected and fixedly attached to the bottom of the protective cover.

[0013] Preferably, a top plate is fixedly attached to the inner wall of the top end of the bag dust removal box. A plurality of skeletons are linearly arranged and installed at the bottom of the top plate. A bag body is sleeved inside each skeleton; a bottom plate is fixedly attached to the top of the bag dust removal box. A reciprocating lead screw is rotatably connected between the bottom plate and the top plate through a bearing. An installation plate is threadedly connected to the reciprocating lead screw. A plurality of cleaning brushes are installed on the installation plate, and the cleaning brushes are respectively attached to the outer sides of the bag bodies; the top of the reciprocating lead screw extends outside the bag dust removal box and is provided with a first motor; two guide rods are fixedly attached between the top plate and the bottom plate, and the installation plate is slidably connected to the two guide rods.

[0014] Preferably, the driving mechanism includes a protective box fixedly attached to the bottom of the bottom plate. The rotating rod is rotatably connected to the protective box through a bearing; a worm gear is fixedly attached to the outer wall of the rotating rod; a worm is fixedly attached to the bottom of the reciprocating lead screw, and both ends of the worm are rotatably connected to the protective box through bearings, and the worm gear is meshed with the worm.

[0015] Preferably, two first hoppers are fixedly attached to the bottom of the bag dust removal box. A first collection box is provided at the bottom of the two first hoppers.

[0016] Preferably, two cam blocks are symmetrically and fixedly attached to both ends of the rotating rod; sliding plates are provided on both sides of the cam blocks. The top ends of the sliding plates are slidably connected to two sliding rods, and one ends of the sliding rods are fixedly attached to the inner wall of the bag dust removal box; springs are sleeved outside the sliding rods, and both ends of the springs are respectively fixedly attached to the sliding plates and the bag dust removal box; two impact rods are fixedly attached to the bottoms of the sliding plates.

[0017] The beneficial effects of the present invention are as follows: 1. For the flue gas dust collector of a thermal power plant described in the present invention, by setting a dust cleaning mechanism, when dust cleaning is required, by turning on the second motor, the output shaft of the second motor drives the disc to rotate, the disc drives the limit post to rotate, and the limit post drives the limit block to move during rotation. The limit block moves horizontally in a reciprocating manner under the constraint of the cross bar. The limit block drives the moving plate to reciprocate, and the moving plate drives the impact post to reciprocate, regularly impacting on the filter plate and the anode plate, realizing the function of patting and cleaning the filter plate and the anode plate.

[0018] 2. A flue gas dust collector for a thermal power plant according to the present invention, by setting a first runner, a second runner and a belt, after the second motor is started, the output shaft of the second motor drives the first runner to rotate, the first runner drives the belt to rotate, the belt drives the second runner to rotate, and the second runner drives the left - and - right - hand thread screw rod to rotate, thereby realizing the function of driving the left - and - right - hand thread screw rod to rotate; the left - and - right - hand thread screw rod drives the cleaning plate to move up and down reciprocally, and the dust on the surface of the cathode plate is scraped off by the up - and - down reciprocating movement of the cleaning plate, realizing the cleaning of the surface of the cathode plate and improving the dust removal efficiency.

[0019] 3. A flue gas dust collector for a thermal power plant according to the present invention, through the cooperation of setting a reciprocating screw rod, a worm, a worm gear and a rotating rod, the reciprocating screw rod drives the mounting plate to move up and down reciprocally, the mounting plate drives the cleaning brush to move up and down reciprocally to clean the dust on the surface of the cloth bag body, thereby improving the dust removal effect of the cloth bag body; when the reciprocating screw rod rotates, it drives the worm to rotate, the worm drives the worm gear to rotate, the worm gear drives the rotating rod to rotate, the rotating rod drives the cyclone fan, the scraping plate and the scraping rod to rotate, and the particulate matter is separated by centrifugal force to clean the dust in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention; Figure 2 is a sectional view of the present invention; Figure 3 is a schematic structural view of the protective cover in the present invention; Figure 4 is a schematic structural view of the protective box in the present invention; Figure 5 is a schematic structural view of the worm and worm gear in the present invention; Figure 6 is a schematic structural view of the cleaning brush in the present invention; Figure 7 is a schematic structural view of the cathode plate in the present invention; Figure 8 is a schematic structural view of the impact plate in the present invention; Figure 9 is a schematic structural view of the cleaning plate in the present invention; Figure 10 is a schematic structural view of the gas delivery pipe in the present invention; In the figure: 1. Bag dust removal box; 11. Air inlet pipe; 111. Protective cover; 112. Feeding pipe; 113. Cyclone fan; 114. Scraper; 115. Scraping rod; 12. First motor; 121. Mounting plate; 122. Cleaning brush; 123. Reciprocating lead screw; 124. Guide rod; 125. Bottom plate; 126. Protective box; 127. Worm; 13. Top plate; 131. Bag body; 14. First hopper; 141. First collection box; 15. Rotating rod; 151. Worm gear; 152. Cam block; 16. Sliding plate; 161. Slide bar; 162. Spring; 163. Impact rod; 17. Connecting pipe; 2. Electrostatic precipitator box; 21. Air inlet; 211. Flow equalizing plate; 22. Exhaust port; 221. Exhaust pipe; 222. Fan; 23. Second hopper; 231. Second collection box; 24. Cathode plate; 241. Filter plate; 242. Anode plate; 25. Second motor; 251. L-shaped plate; 252. Disc; 253. Limit post; 254. Limit block; 255. Fixed block; 256. Cross bar; 257. Moving plate; 258. Impact plate; 259. First runner; 26. Positive and negative thread lead screw; 261. Cleaning plate; 262. Second runner; 263. Belt; 264. Vertical rod; 265. Connecting plate; 27. Air delivery pipe; 271. Nozzle; 272. Branch pipe; 273. Main pipe. Specific embodiments

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] As Figure 1 、 Figure 2 、 Figure 7 and Figure 8As shown in the figure, a flue gas dust collector according to an embodiment of the present invention includes a bag dust removal box 1 and an electrostatic dust removal box 2. An air inlet 21 and an air outlet 22 are respectively provided at both ends of the electrostatic dust removal box 2; the air inlet 21 is connected and fixed to the top of the bag dust removal box 1 through a connecting pipe 17; a cathode plate 24, a filter plate 241 and an anode plate 242 are successively fixed on the inner wall of the electrostatic dust removal box 2; a dust cleaning mechanism is provided in the electrostatic dust removal box 2; the dust cleaning mechanism includes a second motor 25 fixed to the top of the electrostatic dust removal box 2. The output shaft of the second motor 25 is rotatably connected to the electrostatic dust removal box 2 through a bearing and is fixed with a disc 252; a limiting column 253 is fixed to the bottom of the disc 252; four fixing blocks 255 are fixed to the top inner wall of the electrostatic dust removal box 2. A cross bar 256 is fixed on each of two adjacent fixing blocks 255. A limiting block 254 is slidably connected to the two cross bars 256; the limiting column 253 is slidably matched with the limiting block 254; a moving plate 257 is fixed to the bottom of the limiting block 254, and a plurality of impact plates 258 are fixed to the bottom of the moving plate 257. A plurality of impact columns are fixed to the side wall of the impact plate 258.

[0024] In the prior art, a dust collector is a purification and dust removal device for controlling air pollution. Dust particles are captured by the anode plate 242. After a period of time, a large amount of dust particles are deposited on the anode plate 242. If not cleaned in time, excessive accumulation of dust may lead to a decrease in dust removal efficiency; if the dust cleaning is too frequent, the trapping effect may be affected; when the dust cleaning mechanism provided by the present invention is in use, when the flue gas containing dust particles enters from the inlet of the bag dust removal box 1, after bag dust removal, the sulfur-containing flue gas passes through the filter bag, and primary dust removal is performed by the filter bag; then it enters the electrostatic dust removal box 2 through the connecting pipe 17. The dust-containing flue gas after air flow distribution enters the cathode plate 24. The air in the cathode plate 24 is broken down and ionized, releasing electrons. The electrons attach to the dust particles, making the dust particles negatively charged. The negatively charged dust particles slowly pass through a plurality of filter plates 241, and most of them are captured and deposited by the filter plates 241. A small number of uncaught charged or uncharged dust particles pass through the filter plates 241 and move along the electric field lines to a plurality of anode plates 242, and are captured and deposited by the anode plates 242; secondary dust removal is performed by static electricity, and finally it is discharged from the outlet, realizing the prevention and control of air pollution. When cleaning is required, the second motor 25 is turned on, and the output shaft of the second motor 25 drives the disc 252 to rotate, and the disc 252 drives the limiting column 253 to rotate. During the rotation of the limiting column 253, the limiting column 253 and the limiting block 254 slide together, thereby driving the limiting block 254 to move. Under the constraint of the cross bar 256, the limiting block 254 reciprocates horizontally, and the movable plate 257 is driven to reciprocate through the limiting block 254, and the impact column is driven to reciprocate through the movable plate 257, and regularly impacts multiple filter plates 241 and anode plates 242, thereby realizing the beating and cleaning function of the filter plates 241 and anode plates 242.

[0025] like Figure 7 and Figure 9 As shown, a cleaning plate 261 is provided between the gaps of the cathode plates 24; a connecting plate 265 is fixedly connected to the bottom end of the electrostatic precipitator box 2; a forward and reverse screw rod 26 is rotatably connected between the connecting plate 265 and the top inner wall of the electrostatic precipitator box 2 via a bearing, and the cleaning plate 261 is threadedly connected to the forward and reverse screw rod 26; two vertical rods 264 are fixedly connected between the connecting plate 265 and the top inner wall of the electrostatic precipitator box 2, and the cleaning plate 261 is slidably connected to the two vertical rods 264; a linkage mechanism is provided between the forward and reverse screw rod 26 and the second motor 25.

[0026] At the edge of the corona zone, a small amount of dust may be adsorbed by the cathode plate 24 due to the acquisition of positive charge; when the anode is vibrated for cleaning, some dust may be carried by the airflow to the vicinity of the cathode and adhere to it, resulting in local dust accumulation; the cleaning plate 261 provided by the present invention is used to clean the dust on the surface of the cathode plate 24 when in use, and the positive and negative screw rods 26 are driven to rotate by a linkage mechanism. The bidirectional thread design of the positive and negative screw rods 26 and the two nuts matched with the left and right threads respectively realize bidirectional synchronous motion, thereby driving the cleaning plate 261 to reciprocate up and down. The dust on the surface of the cathode plate 24 is scraped off by the up and down reciprocating motion of the cleaning plate 261, which facilitates the cleaning of the surface of the cathode plate 24 and improves the dust removal efficiency.

[0027] like Figure 7 and Figure 9 As shown, the linkage mechanism includes a second rotating wheel 262 fixedly connected to the top of the forward and reverse screw rods 26; the output shaft of the second motor 25 is fixedly connected to the first rotating wheel 259, and a belt 263 is sleeved between the first rotating wheel 259 and the second rotating wheel 262. The second motor 25 is fixedly connected to the top of the electrostatic dust removal box 2 through an L-shaped plate 251.

[0028] When in use, the linkage mechanism provided by the present invention is used to drive the forward and reverse lead screw 26 to rotate. After the second motor 25 is started, the output shaft of the second motor 25 drives the first runner 259 to rotate, drives the belt 263 to rotate through the first runner 259, drives the second runner 262 to rotate through the belt 263, and drives the forward and reverse lead screw 26 to rotate through the second runner 262, thereby realizing the function of driving the forward and reverse lead screw 26 to rotate.

[0029] As Figure 2 , Figure 7 and Figure 10 As shown in

[0030] When in use, after the main pipe 273 and the branch pipes 272 provided by the present invention are used for dust cleaning for a period of time, dust particles adhere to the inner wall of the second hopper 23. The dust particles are light in mass and are not easily directly slipped into the second collection box 231. By inputting nitrogen into the main pipe 273, the nitrogen enters the air pipes 27 through the two branch pipes 272 respectively. The nitrogen in the air pipes 27 finally sprays towards the inner wall of the second hopper 23 through the nozzles 271, blowing the dust particles on the inner wall of the second hopper 23 into the second collection box 231, realizing the cleaning function of the second hopper 23.

[0031] As Figure 2 As shown in

[0032] When in use, the flow equalizing plates 211 provided by the present invention are used to evenly disperse the high-speed airflow, reduce turbulence, ensure that the dust evenly enters the electric field area, improve the charging efficiency, and cooperate with the cathode in front to ensure that the dust is fully charged; the filter holes of the multiple filter plates 241 gradually decrease in diameter, gradually capturing coarse particles, fine particles and sub-micron particles, realizing the function of graded filtration; which is beneficial to preventing air pollution.

[0033] As Figure 2 , Figure 3 and Figure 5As shown, at the bottom of one end of the bag dust removal box 1 away from the connecting pipe 17, an air inlet pipe 11 is connected and fixed. One end of the air inlet pipe 11 located inside the bag dust removal box 1 is connected and fixed with a protective cover 111. A rotating rod 15 is arranged inside the protective cover 111. A driving mechanism is arranged at one end of the rotating rod 15. Two cyclone fans 113 are arranged on the rotating rod 15. A filter screen is installed at one end of the protective cover 111 away from the air inlet pipe 11. Two scraping plates 114 are fixed on the rotating rod 15, and the scraping plates 114 are in contact with the surface of the filter screen. Two scraping rods 115 are fixed on the rotating rod 15, and the scraping rods 115 are in contact with the inner wall of the protective cover 111. A blanking pipe 112 is connected and fixed at the bottom of the protective cover 111.

[0034] During the emission process of the flue gas in a thermal power plant, some fuels are not completely burned and are emitted together with the flue gas. There may be sparks in this part of the fuel, which may damage the bag body 131. When the cyclone fan 113 provided by the present invention is in use, particulate matter is separated by centrifugal force. The dust-containing flue gas enters the protective cover 111 along the tangential direction, rotates to generate centrifugal force, and the coarse particles are thrown towards the wall surface and fall to the bottom of the protective cover 111. The purified gas is discharged from the center, and the extinguished sparks and their coarse particle impurities are discharged from the blanking pipe 112. Among them, the scraping plate 114 is used to scrape the dust on the surface of the filter screen to prevent the filter screen from being blocked. The scraping rod 115 is used to scrape the particulate impurities on the inner wall of the protective cover 111 to facilitate the rapid sliding of the particulate impurities, realizing the removal of sparks and coarse particle impurities.

[0035] As Figures 1 to 4 As shown, a top plate 13 is fixed on the inner wall of the top end of the bag dust removal box 1. A plurality of skeletons are linearly arranged and installed at the bottom of the top plate 13. A bag body 131 is sleeved inside each skeleton. A bottom plate 125 is fixed on the top of the bag dust removal box 1. A reciprocating lead screw 123 is rotatably connected between the bottom plate 125 and the top plate 13 through a bearing. An installation plate 121 is threadedly connected to the reciprocating lead screw 123. A plurality of cleaning brushes 122 are installed on the installation plate 121, and the cleaning brushes 122 are respectively attached to the outer side of the bag body 131. The top of the reciprocating lead screw 123 extends outside the bag dust removal box 1 and is provided with a first motor 12. Two guide rods 124 are fixed between the top plate 13 and the bottom plate 125, and the installation plate 121 is slidably connected to the two guide rods 124.

[0036] The cleaning brush 122 provided by the present invention is used to clean the cloth bag body 131 during use. After the cloth bag body 131 has been dust-removed for a period of time, more dust may be adsorbed on its surface. By turning on the first motor 12, the output shaft of the first motor 12 drives the reciprocating lead screw 123 to rotate. Since the reciprocating lead screw 123 is designed with double-threaded screws to form a symmetrical structure, the reciprocating lead screw 123 drives the mounting plate 121 to move up and down reciprocally. The up-and-down reciprocating movement of the mounting plate 121 drives the cleaning brush 122 to move up and down reciprocally, and the cleaning brush 122 cleans the dust on the surface of the cloth bag body 131, thereby improving the dust-removing effect of the cloth bag body 131 and extending the dust-removing life of the cloth bag body 131.

[0037] As Figure 4 and Figure 5 As shown, the driving mechanism includes a protective box 126 fixedly connected to the bottom of the bottom plate 125, and the rotating rod 15 is rotatably connected to the protective box 126 through a bearing; a worm gear 151 is fixedly connected to the outer wall of the rotating rod 15; the bottom of the reciprocating lead screw 123 is fixedly connected with a worm 127, and both ends of the worm 127 are rotatably connected to the protective box 126 through bearings, and the worm gear 151 meshes with the worm 127.

[0038] When the driving mechanism provided by the present invention is in use, the reciprocating lead screw 123 drives the worm 127 to rotate when rotating, the worm 127 drives the worm gear 151 to rotate, the worm gear 151 drives the rotating rod 15 to rotate, and the rotating rod 15 drives the cyclone fan 113, the scraper 114 and the scraping rod 115 to rotate, realizing the functions of simultaneously cleaning the cloth bag body 131 and removing sparks.

[0039] As Figures 1 to 2 As shown, two first hoppers 14 are fixedly connected to the bottom of the cloth bag dust removal box 1, and a first collection box 141 is provided at the bottom of the two first hoppers 14.

[0040] The first hopper 14 provided by the present invention is used to collect spark impurities and particulate impurities during use, thereby realizing the function of uniformly recycling and treating the dust in the cloth bag dust removal box 1.

[0041] As Figure 3 and Figure 5 As shown, two cam blocks 152 are symmetrically fixedly connected to both ends of the rotating rod 15; sliding plates 16 are provided on both sides of the cam blocks 152, the top ends of the sliding plates 16 are slidably connected to two sliding rods 161, and one ends of the sliding rods 161 are fixedly connected to the inner wall of the cloth bag dust removal box 1; springs 162 are sleeved on the outer sides of the sliding rods 161, and both ends of the springs 162 are fixedly connected to the sliding plates 16 and the cloth bag dust removal box 1 respectively; two impact rods 163 are fixedly connected to the bottom of the sliding plates 16.

[0042] The impact rod 163 provided by the present invention is used to slap the inner wall of the first drop hopper 14 when in use. When the rotating rod 15 rotates, the rotating rod 15 drives the cam block 152 to rotate. During the rotation of the cam block 152, the sliding plate 16 on one side is pressed. The sliding plate 16 drives the impact rod 163 to hit the inner wall of the first drop hopper 14. When the cam block 152 rotates away from the sliding plate 16 on this side, under the action of the spring 162, the sliding plate 16 drives the impact rod 163 to continue to vibrate and hit. At the same time, the cam block 152 rotates to the sliding plate 16 on the other side, driving the sliding plate 16 and the impact rod 163 to hit the other side of the first drop hopper 14, and so on and so forth, thereby accelerating the dropping of dust on the inner wall of the first drop hopper 14.

[0043] Working principle: A dust collector is a purification and dust removal equipment used to control air pollution. Dust particles are captured by the anode plate 242. After a period of time, a large amount of dust particles are deposited on the anode plate 242. If it is not cleaned in time, excessive dust accumulation may lead to a decrease in dust removal efficiency; if the dust is cleaned too frequently, the capture effect may be affected; when the cleaning mechanism provided by the present invention is in use, when the flue gas containing dust particles enters the inlet of the bag-type dust collector 1, it passes through the bag-type dust collector, and the sulfur-containing flue gas passes through the filter bag and is initially dusted by the filter bag; then it enters the electrostatic dust collector 2 through the connecting pipe 17, and the dust-containing flue gas after airflow distribution enters the cathode plate 24, and the air in the cathode plate 24 is broken down and ionized, releasing electrons. The electrons attach to the dust particles, making the dust particles negatively charged, and the negatively charged dust particles pass through multiple filter plates 241 at a low speed, and most of them are filtered by the filter plates 241 captures and deposits, and the less charged or uncharged dust particles that are not captured pass through the filter plate 241 and move along the electric field lines to multiple anode plates 242, and are captured by the anode plates 242 and deposited; secondary dust removal is performed through static electricity, and finally discharged from the outlet, thereby achieving the prevention and control of air pollution; when dust cleaning is required, by turning on the second motor 25, the output shaft of the second motor 25 drives the disc 252 to rotate, and the disc 252 drives the limit column 253 to rotate, and the limit column 253 drives the limit block 254 to move during the rotation process, and the limit block 254 is constrained by the cross bar 256, The horizontal reciprocating motion, the reciprocating motion of the movable plate 257 is driven by the limit block 254, and the reciprocating motion of the impact column is driven by the movable plate 257, and the regular impact on the multiple filter plates 241 and the anode plate 242 is achieved. The beating and cleaning function of the filter plates 241 and the anode plates 242 is realized.

[0044] After the second motor 25 is started, the output shaft of the second motor 25 drives the first runner 259 to rotate. The first runner 259 drives the belt 263 to rotate, the belt 263 drives the second runner 262 to rotate, and the second runner 262 drives the left - and - right - hand screw rod 26 to rotate, thus realizing the function of driving the left - and - right - hand screw rod 26 to rotate. The left - and - right - hand screw rod 26 drives the cleaning plate 261 to move up and down reciprocally. The cleaning plate 261 scrapes the dust on the surface of the cathode plate 24, facilitating the cleaning of the surface of the cathode plate 24 and improving the dust removal efficiency.

[0045] After dust cleaning for a period of time, dust particles adhere to the inner wall of the second hopper 23. The dust particles are light in mass and not easily slide directly into the second collection box 231. By inputting nitrogen into the main pipe 273, the nitrogen enters the air delivery pipes 27 through two branch pipes 272 respectively. The nitrogen in the air delivery pipes 27 finally sprays onto the inner wall of the second hopper 23 through the nozzles 271, blowing the dust particles on the inner wall of the second hopper 23 into the second collection box 231, realizing the cleaning function of the second hopper 23.

[0046] After the dust - removal bag body 131 has been dust - removing for a period of time, more dust may be adsorbed on its surface. By starting the first motor 12, the output shaft of the first motor 12 drives the reciprocating screw rod 123 to rotate. The reciprocating screw rod 123 drives the mounting plate 121 to move up and down reciprocally. The mounting plate 121 drives the cleaning brush 122 to move up and down reciprocally. The cleaning brush 122 cleans the dust on the surface of the dust - removal bag body 131, thereby improving the dust - removal effect of the dust - removal bag body 131 and prolonging the dust - removal life of the dust - removal bag body 131. When the reciprocating screw rod 123 rotates, it drives the worm 127 to rotate. The worm 127 drives the worm wheel 151 to rotate. The worm wheel 151 drives the rotating rod 15 to rotate. The rotating rod 15 drives the cyclone fan 113, the scraping plate 114 and the scraping rod 115 to rotate. Particulate matter is separated by centrifugal force. The dust - laden flue gas enters the protective cover 111 along the tangential direction, rotates to generate centrifugal force, and the coarse particles are thrown towards the wall surface and fall to the bottom of the protective cover 111. The purified gas is discharged from the center, and the extinguished sparks and their coarse - particle impurities are discharged from the feed pipe 112. During the rotation of the rotating rod 15, the rotating rod 15 drives the cam block 152 to rotate. During the rotation of the cam block 152, it presses one side of the sliding plate 16. The sliding plate 16 drives the impact rod 163 to impact on the inner wall of the first hopper 14. When the cam block 152 rotates away from this side of the sliding plate 16, under the action of the spring 162, this sliding plate 16 drives the impact rod 163 to continue vibrating and impacting. At the same time, the cam block 152 rotates to the other side of the sliding plate 16, driving the sliding plate 16 and the impact rod 163 to impact on the other side of the first hopper 14. In this way, the reciprocation accelerates the falling of the dust on the inner wall of the first hopper 14.

[0047] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A flue gas dust collector for a thermal power plant, comprising a bag dust removal box (1) and an electrostatic dust removal box (2). An air inlet (21) and an air outlet (22) are respectively provided at both ends of the electrostatic dust removal box (2); the air inlet (21) is connected and fixed to the top of the bag dust removal box (1) through a connecting pipe (17); a cathode plate (24), a filter plate (241) and an anode plate (242) are successively fixed on the inner wall of the electrostatic dust removal box (2); a dust cleaning mechanism is arranged in the electrostatic dust removal box (2). It is characterized in that: The dust cleaning mechanism includes a second motor (25) fixed to the top of the electrostatic dust removal box (2). The output shaft of the second motor (25) is rotatably connected to the electrostatic dust removal box (2) through a bearing and is fixed with a disc (252); a limiting column (253) is fixed to the bottom of the disc (252); four fixing blocks (255) are fixed to the inner wall of the top of the electrostatic dust removal box (2). A cross bar (256) is fixed on each of two adjacent fixing blocks (255). A limiting block (254) is slidably connected to the two cross bars (256); the limiting column (253) is slidably engaged with the limiting block (254); a moving plate (257) is fixed to the bottom of the limiting block (254), and a plurality of impact plates (258) are fixed to the bottom of the moving plate (257). A plurality of impact columns are fixed to the side wall of the impact plate (258).

2. The flue gas dust collector for a thermal power plant according to claim 1, characterized in that: A cleaning plate (261) is arranged between the gaps of the cathode plates (24); a connecting plate (265) is fixed to the bottom end of the electrostatic dust removal box (2); a positive and negative thread lead screw (26) is rotatably connected between the connecting plate (265) and the inner wall of the top of the electrostatic dust removal box (2) through a bearing. The cleaning plate (261) is threadedly connected to the positive and negative thread lead screw (26); two vertical rods (264) are fixed between the connecting plate (265) and the inner wall of the top of the electrostatic dust removal box (2). The cleaning plate (261) is slidably connected to the two vertical rods (264); a linkage mechanism is arranged between the positive and negative thread lead screw (26) and the second motor (25).

3. The flue gas dust collector for a thermal power plant according to claim 2, characterized in that: The linkage mechanism includes a second runner (262) fixed to the top end of the positive and negative thread lead screw (26); a first runner (259) is fixed to the output shaft of the second motor (25). A belt (263) is sleeved between the first runner (259) and the second runner (262). The second motor (25) is fixed to the top of the electrostatic dust removal box (2) through an L-shaped plate (251).

4. The flue gas dust collector for a thermal power plant according to claim 3, characterized in that: Two second hoppers (23) are fixed to the bottom of the electrostatic dust removal box (2). A second collection box (231) is arranged at the bottom of the two second hoppers (23); air delivery pipes (27) are fixed to the inner walls of the top ends of the hoppers. A plurality of nozzles (271) are installed at the bottoms of the air delivery pipes (27). Branch pipes (272) are connected and fixed to the air delivery pipes (27); a main pipe (273) is connected and fixed between the two branch pipes (272) through a connector; the air outlet (22) is connected and fixed to an exhaust pipe (221), and a fan (222) is installed on the exhaust pipe (221).

5. The flue gas dust collector for a thermal power plant according to claim 4, characterized in that: On the inner wall of one end of the electrostatic dust removal box (2) close to the air inlet (21), two flow equalizing plates (211) are fixedly connected; the cathode plate (24) is arranged at one end close to the flow equalizing plate (211); a plurality of filter plates (241) are provided, and the diameter of the filter holes gradually decreases from the cathode plate (24) to the anode plate (242); a plurality of anode plates (242) are provided, and the area of the anode plate (242) close to the exhaust port (22) is larger than the area of the exhaust port (22).

6. The flue gas dust collector for a thermal power plant according to claim 5, wherein: At the bottom of one end of the bag dust removal box (1) far from the connecting pipe (17), an air inlet pipe (11) is fixedly connected in a communicating manner. One end of the air inlet pipe (11) located inside the bag dust removal box (1) is fixedly connected in a communicating manner with a protective cover (111). A rotating rod (15) is arranged inside the protective cover (111). A driving mechanism is arranged at one end of the rotating rod (15). Two cyclone fans (113) are arranged on the rotating rod (15). A filter screen is installed at one end of the protective cover (111) far from the air inlet pipe (11). Two scraping plates (114) are fixedly connected to the rotating rod (15), and the scraping plates (114) are in contact with the surface of the filter screen; two scraping rods (115) are fixedly connected to the rotating rod (15), and the scraping rods (115) are in contact with the inner wall of the protective cover (111); a blanking pipe (112) is fixedly connected in a communicating manner to the bottom of the protective cover (111).

7. The flue gas dust collector for a thermal power plant according to claim 6, characterized in that: On the inner wall of the top end of the bag dust removal box (1), a top plate (13) is fixedly connected. A plurality of skeletons are linearly arranged and installed at the bottom of the top plate (13). A bag body (131) is sleeved inside each skeleton; a bottom plate (125) is fixedly connected to the top of the bag dust removal box (1). A reciprocating lead screw (123) is rotatably connected between the bottom plate (125) and the top plate (13) through a bearing. A mounting plate (121) is threadedly connected to the reciprocating lead screw (123). A plurality of cleaning brushes (122) are installed on the mounting plate (121), and the cleaning brushes (122) are respectively attached to the outer sides of the bag bodies (131); the top of the reciprocating lead screw (123) extends outside the bag dust removal box (1) and is provided with a first motor (12); two guide rods (124) are fixedly connected between the top plate (13) and the bottom plate (125), and the mounting plate (121) is slidably connected to the two guide rods (124).

8. The flue gas dust collector for a thermal power plant according to claim 7, wherein: The driving mechanism includes a protective box (126) fixedly connected to the bottom of the bottom plate (125). The rotating rod (15) is rotatably connected to the protective box (126) through a bearing; a worm gear (151) is fixedly connected to the outer wall of the rotating rod (15); a worm (127) is fixedly connected to the bottom of the reciprocating lead screw (123). Both ends of the worm (127) are rotatably connected to the protective box (126) through bearings, and the worm gear (151) meshes with the worm (127).

9. The flue gas dust collector for a thermal power plant according to claim 8, wherein: Two first hoppers (14) are fixedly connected to the bottom of the bag dust removal box (1), and a first collection box (141) is arranged at the bottom of the two first hoppers (14).

10. The flue gas dust collector for a thermal power plant according to claim 9, wherein: Both ends of the rotating rod (15) are symmetrically and fixedly connected with two cam blocks (152); sliding plates (16) are arranged on both sides of the cam blocks (152), and two sliding rods (161) are slidably connected to the tops of the sliding plates (16). One ends of the sliding rods (161) are fixedly connected to the inner wall of the bag dust collector (1); springs (162) are sleeved on the outer sides of the sliding rods (161), and two ends of the springs (162) are respectively fixedly connected to the sliding plates (16) and the bag dust collector (1); two impact rods (163) are fixedly connected to the bottoms of the sliding plates (16).

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