A flue gas precipitator for a thermal power plant

Abstract

The application belongs to the technical field of air pollution control, in particular to a thermal power plant flue gas dust collector, which comprises a bag dust removal box and an electrostatic dust removal box, both ends of the electrostatic dust removal box are respectively provided with an air inlet and an air outlet, the air inlet is connected to the top end of the bag dust removal box through a communication pipe, a dust removal mechanism is arranged, dust particles are captured by an anode plate, after a period of time, the anode plate is deposited with more dust particles, when dust removal is needed, a second motor is started, the output shaft of the second motor drives the disc to rotate, the disc drives the limiting column to rotate, the limiting column drives the limiting block to move in the rotating process, the limiting block moves horizontally and reciprocally under the constraint of the cross rod, the limiting block drives the moving plate to move reciprocally, the moving plate drives the impact column to move reciprocally, and the impact column regularly impacts on the multiple filter plates and the anode plate, thereby achieving the function of beating and dust removal of the filter plates and the anode plate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air pollution control, and particularly relates to a thermal power plant flue gas dust collector. BACKGROUND

[0002] The dust collector is a flue gas purification and dust removal equipment used for treating industrial flue gas dust, and is mainly used for removing particulate dust, smelting escape, aerosol and other pollution and harmful substances in the dust-containing body, and is an effective equipment for treating air pollution. With the increasingly stringent environmental protection regulations and the gradual rise of fuel prices, higher requirements are put forward for the standard discharge and energy saving and consumption reduction in flue gas treatment of high-temperature flue gas of thermal power plants.

[0003] A high-efficiency electrostatic dust collector is disclosed in a Chinese patent with the publication number CN105689140B, which comprises a dust collector body, an inlet head, an outlet head and an ash hopper. A plurality of groups of electric field structures are arranged from the inlet end to the outlet end of the dust collector body. Each group of electric field structures comprises a plurality of groups of three-electrode micro-wind dust removal units arranged side by side. Each group of three-electrode micro-wind dust removal units is composed of a cathode suspension and left and right louvered electrode plates and left and right anode plates. After the flue gas containing dust particles enters from the inlet of the dust collector body, it first enters the first group of electric field structures for electric dust removal. The electric field A releases electrons, which adhere to the dust particles to make the dust particles negatively charged. The negatively charged dust particles pass through the louvered electrode plate at a very low speed. The dust particles that are not captured or not charged pass through the louvered electrode plate and enter the electric field B. The electric field B releases electrons, which adhere to the dust particles to make the dust particles negatively charged. The negatively charged dust particles move along the electric field lines under the action of the electric field B to the anode plate, are captured by the anode plate and are deposited, and are finally discharged from the outlet of the dust collector body.

[0004] In the prior art, the dust particles are captured by the anode plate. After a period of time, the anode plate deposits a large amount of dust particles. If not cleaned in time, excessive accumulation of dust may cause the dust removal efficiency to decrease. If the dust is cleaned too frequently, the capture effect may be affected.

[0005] Therefore, the present application provides a thermal power plant flue gas dust collector. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the power plant flue gas dust collector comprises a bag dust removal box and an electrostatic dust removal box, the electrostatic dust removal box is respectively provided with an air inlet and an air outlet at two ends, the air inlet is communicated with the top end of the bag dust removal box through a communication pipe, a cathode plate, a filter plate and an anode plate are sequentially fixed on the inner wall of the electrostatic dust removal box, and a dust removal mechanism is arranged in the electrostatic dust removal box.

[0008] The dust removal mechanism comprises a second motor fixed on the top of the electrostatic dust removal box, the output shaft of the second motor is rotatably connected to the electrostatic dust removal box through a bearing, and a disc is fixed thereon, the bottom of the disc is fixed with a limiting column, four fixed blocks are fixed on the top inner wall of the electrostatic dust removal box, a cross rod is fixed on each of the two adjacent fixed blocks, and a limiting block is slidably connected to the two cross rods, the limiting column is slidably matched with the limiting block, the bottom of the limiting block is fixed with a moving plate, a plurality of impact plates are fixed on the bottom of the moving plate, and a plurality of impact columns are fixed on the side wall of the impact plate.

[0009] Preferably, the gap between the cathode plates is provided with a cleaning plate, the bottom end of the electrostatic dust removal box is fixed with a connecting plate, a forward and reverse thread rod is rotatably connected between the connecting plate and the top inner wall of the electrostatic dust removal box through a bearing, the cleaning plate is threadedly connected to the forward and reverse thread rod, two vertical rods are fixed between the connecting plate and the top inner wall of the electrostatic dust removal box, and the cleaning plate is slidably connected to the two vertical rods.

[0010] Preferably, the linkage mechanism comprises a second rotating wheel fixed on the top end of the forward and reverse thread rod, the output shaft of the second motor is fixed with a first rotating wheel, a belt is sleeved between the first rotating wheel and the second rotating wheel, and the second motor is fixed on the top of the electrostatic dust removal box through an L-shaped plate.

[0011] Preferably, the bottom of the electrostatic dust removal box is fixed with two second material hoppers, the bottom of the two second material hoppers is provided with a second collecting box, the top inner wall of the material hopper is fixed with a gas conveying pipe, a plurality of nozzles are mounted on the bottom of the gas conveying pipe, a branch pipe is fixedly connected to the gas conveying pipe, a main pipe is fixedly connected between the two branch pipes through a connecting head, the air outlet is fixedly connected with an exhaust pipe, and a fan is mounted on the exhaust pipe.

[0012] Preferably, two flow uniformizing plates are fixed on the inner wall of one end of the electrostatic dust removal box close to the air inlet, the cathode plate is arranged at one end close to the flow uniformizing plate, the filter plate is provided with a plurality of filter holes, the diameter of the filter holes gradually decreases from the cathode plate to the anode plate, the anode plate is provided with a plurality of anode plates, and the area of the anode plate close to the air outlet is greater than the area of the air outlet.

[0013] Preferably, the cloth bag dust removal box is communicated and fixed with an air inlet pipe at the bottom of one end away from the communicating pipe, the air inlet pipe is communicated and fixed with a protective cover at one end in the cloth bag dust removal box, the protective cover is provided with a rotating rod, one end of the rotating rod is provided with a driving mechanism, two cyclone fans are arranged on the rotating rod, a filter screen is installed on the end of the protective cover away from the air inlet pipe, two scrapers are fixed on the rotating rod and contact with the surface of the filter screen, two impact rods are fixed on the rotating rod and contact with the inner wall of the protective cover, and a discharging pipe is communicated and fixed at the bottom of the protective cover.

[0014] Preferably, the top end inner wall of the cloth bag dust removal box is fixed with a top plate, a plurality of skeletons are linearly arranged and installed at the bottom of the top plate, and the skeletons are all sleeved with cloth bag bodies; the top of the cloth bag dust removal box is fixed with a bottom plate, a reciprocating screw rod is rotationally connected between the bottom plate and the top plate through a bearing, an installation plate is threadedly connected to the reciprocating screw rod, a plurality of cleaning brushes are installed on the installation plate and respectively attached to the outer sides of the cloth bag bodies, and the reciprocating screw rod extends to the outside of the cloth bag dust removal box at the top and is provided with a first motor.

[0015] Preferably, the driving mechanism comprises a protective box fixed at the bottom of the bottom plate, the rotating rod is rotationally connected to the protective box through a bearing, a worm wheel is fixed on the outer wall of the rotating rod, and a worm is fixed at the bottom of the reciprocating screw rod, both ends of the worm are rotationally connected to the protective box through bearings, and the worm wheel is engaged with the worm.

[0016] Preferably, the bottom of the cloth bag dust removal box is fixed with two first discharging hoppers, and the bottom of each of the two first discharging hoppers is provided with a first collecting box.

[0017] Preferably, two cam blocks are symmetrically fixed at both ends of the rotating rod, sliding plates are arranged on both sides of each cam block, two sliding rods are slidably connected to the top end of each sliding plate, one end of each sliding rod is fixed on the inner wall of the cloth bag dust removal box, springs are sleeved on the outer sides of the sliding rods, both ends of each spring are fixed on the sliding plate and the cloth bag dust removal box, respectively, and two impact rods are fixed on the bottom of each sliding plate.

[0018] The beneficial effects of the application are as follows:

[0019] 1. The flue gas dust remover for thermal power plants, by arranging the ash removal mechanism, when ash removal is needed, the second motor is started, the output shaft of the second motor drives the disc to rotate, the disc drives the limiting column to rotate, the limiting column drives the limiting block to move in the rotating process, the limiting block moves horizontally and reciprocally under the constraint of the cross rod, the limiting block drives the moving plate to move reciprocally, the moving plate drives the impact column to move reciprocally, and the impact column impacts the filter plate and the anode plate regularly, so that the ash removal function of the filter plate and the anode plate is realized.

[0020] 2. The thermal power plant flue gas dust remover, through the cooperation of the first rotating wheel, the second rotating wheel and the belt, the output shaft of the second motor drives the first rotating wheel to rotate, the first rotating wheel drives the belt to rotate, the belt drives the second rotating wheel to rotate, and the second rotating wheel drives the positive and negative toothed rod to rotate, so that the function of driving the positive and negative toothed rod to rotate is realized; the cleaning plate is driven by the positive and negative toothed rod to move up and down reciprocatingly, dust on the surface of the cathode plate is scraped off through the up and down reciprocating movement of the cleaning plate, the surface of the cathode plate is cleaned, and the dust removal efficiency is improved.

[0021] 3. The thermal power plant flue gas dust remover, through the cooperation of the reciprocating silk rod, the worm, the worm wheel and the rotating rod, the reciprocating silk rod drives the mounting plate to move up and down reciprocatingly, the mounting plate drives the cleaning brush to move up and down reciprocatingly, dust on the surface of the bag body is cleaned, so that the dust removal effect of the bag body is improved; the reciprocating silk rod drives the worm to rotate when rotating, the worm drives the worm wheel to rotate, the worm wheel drives the rotating rod to rotate, the rotating rod drives the cyclone fan, the scraper and the scraping rod to rotate, particles are separated through centrifugal force, and dust in flue gas is cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below in combination with the drawings.

[0023] Figure 1 is a perspective view of the application;

[0024] Figure 2 is a sectional view of the application;

[0025] Figure 3 is a structural schematic view of the protective cover in the application;

[0026] Figure 4 is a structural schematic view of the protective box in the application;

[0027] Figure 5 is a structural schematic view of the worm and worm wheel in the application;

[0028] Figure 6 is a structural schematic view of the cleaning brush in the application;

[0029] Figure 7 is a structural schematic view of the cathode plate in the application;

[0030] Figure 8 is a structural schematic view of the impact plate in the application;

[0031] Figure 9 is a structural schematic view of the cleaning plate in the application;

[0032] Figure 10is a structural schematic view of a gas conveying pipe in the present application;

[0033] In the figure: 1, cloth bag dust removal box; 11, air inlet pipe; 111, protective cover; 112, blanking pipe; 113, cyclone fan; 114, scraper; 115, scraping rod; 12, first motor; 121, mounting plate; 122, cleaning brush; 123, reciprocating screw rod; 124, guide rod; 125, bottom plate; 126, protective box; 127, worm; 13, top plate; 131, cloth bag body; 14, first blanking hopper; 141, first collecting box; 15, rotating rod; 151, worm wheel; 152, cam block; 16, sliding plate; 161, sliding rod; 162, spring; 163, impact rod; 17, communication pipe; 2, electrostatic dust removal box; 21, air inlet; 211, flow equalizing plate; 22, air outlet; 221, exhaust pipe; 222, fan; 23, second blanking hopper; 231, second collecting box; 24, cathode plate; 241, filter plate; 242, anode plate; 25, second motor; 251, L-shaped plate; 252, disc; 253, limiting column; 254, limiting block; 255, fixed block; 256, cross rod; 257, moving plate; 258, impact plate; 259, first rotating wheel; 26, reverse tooth screw rod; 261, cleaning plate; 262, second rotating wheel; 263, belt; 264, vertical rod; 265, connecting plate; 27, gas conveying pipe; 271, nozzle; 272, branch pipe; 273, main pipe. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0035] As Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the power plant flue gas dust collector provided by the embodiment of the present application comprises a bag dust removal box 1 and an electrostatic dust removal box 2, the electrostatic dust removal box 2 is respectively provided with an air inlet 21 and an air outlet 22 at two ends thereof, the air inlet 21 is communicated with the top end of the bag dust removal box 1 through a communicating pipe 17, cathode plates 24, filter plates 241 and anode plates 242 are sequentially 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, the dust cleaning mechanism comprises a second motor 25 fixed on 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 on the bottom of the disc 252, four fixing blocks 255 are fixed on the top inner wall of the electrostatic dust removal box 2, a horizontal rod 256 is fixed on each of two adjacent fixing blocks 255, a limiting block 254 is slidably connected to the two horizontal rods 256, the limiting column 253 is slidably matched with the limiting block 254, a moving plate 257 is fixed on the bottom of the limiting block 254, a plurality of impact plates 258 are fixed on the bottom of the moving plate 257, a plurality of impact columns are fixed on the side wall of the impact plate 258.

[0036] In the prior art, the dust collector is a purification and dust removal device for treating air pollution, dust particles are captured by the anode plates 242, after a period of time, the anode plates 242 are deposited with more dust particles, if not cleaned in time, excessive accumulation of dust may cause the dust removal efficiency to decrease, if the dust is cleaned too frequently, the capture effect may be affected, the dust cleaning mechanism provided by the present application is used when the flue gas containing dust particles enters from the inlet of the bag dust removal box 1, after bag dust removal, the flue gas containing sulfur passes through the filter bag and is initially removed by the filter bag, then enters the electrostatic dust removal box 2 through the communicating pipe 17, the dust-containing flue gas after airflow distribution enters the cathode plates 24, the air in the cathode plates 24 is broken and ionized to release electrons, the electrons adhere to the dust particles to make the dust particles negatively charged, the negatively charged dust particles pass through the plurality of filter plates 241 at low speed, most of the dust particles are captured and deposited by the filter plates 241, and the few dust particles that are not captured or are not charged move to the plurality of anode plates 242 along the electric field lines and are captured and deposited by the anode plates 242, the dust is secondarily removed by electrostatic force, and finally is discharged from the outlet, thereby achieving prevention and treatment of air pollution.

[0037] When dust needs to be cleaned, the second motor 25 is started, the output shaft of the second motor 25 drives the disc 252 to rotate, the disc 252 drives the limiting column 253 to rotate, and the limiting column 253 drives the limiting block 254 to move in the rotating process due to the sliding fit between the limiting column 253 and the limiting block 254, the limiting block 254 moves horizontally under the constraint of the cross rod 256, the moving plate 257 is driven to move reciprocatingly by the limiting block 254, and the impact column is driven to move reciprocatingly by the moving plate 257, and the impact column impacts the filter plate 241 and the anode plate 242 regularly to realize the dust cleaning function of the filter plate 241 and the anode plate 242.

[0038] As shown in Figure 7 and Figure 9 , the gap between the cathode plate 24 is provided with a cleaning plate 261; the bottom end of the electrostatic dust removal box 2 is fixedly connected with a connecting plate 265; the connecting plate 265 and the top inner wall of the electrostatic dust removal box 2 are rotatably connected through a bearing with a positive and negative toothed rod 26, and the cleaning plate 261 is screwedly connected on the positive and negative toothed rod 26; the connecting plate 265 and the top inner wall of the electrostatic dust removal box 2 are fixedly connected with two vertical rods 264, and the cleaning plate 261 is slidably connected on the two vertical rods 264; the positive and negative toothed rod 26 and the second motor 25 are provided with a linkage mechanism.

[0039] At the edge of the corona area, a small amount of dust may be adsorbed by the cathode plate 24 due to the positive charge; when the anode plate is shaken to clean dust, part of the dust may be carried by the airflow to the vicinity of the cathode and attached, resulting in local dust accumulation; the cleaning plate 261 provided by the application is used for cleaning the dust on the surface of the cathode plate 24 during use, the positive and negative toothed rod 26 is driven to rotate through the linkage mechanism, the bidirectional screw thread design of the positive and negative toothed rod 26 is matched with two nuts, and the two nuts are matched with the left and right threads respectively, so that bidirectional synchronous movement can be realized, so as to drive the cleaning plate 261 to move up and down reciprocatingly, the dust on the surface of the cathode plate 24 is scraped off through the up and down reciprocating movement of the cleaning plate 261, the surface of the cathode plate 24 is cleaned, and the dust removal efficiency is improved.

[0040] As shown in Figure 7 and Figure 9 , the linkage mechanism comprises a second rotating wheel 262 fixedly connected to the top end of the positive and negative toothed rod 26; the output shaft of the second motor 25 is fixedly connected with a first rotating wheel 259, the first rotating wheel 259 and the second rotating wheel 262 are sleeved with a belt 263, and the second motor 25 is fixedly connected to the top of the electrostatic dust removal box 2 through an L-shaped plate 251.

[0041] The linkage mechanism provided by the application is used for driving the positive and negative toothed lead screw 26 to rotate in use.

[0042] As shown in Figure 2 , Figure 7 and Figure 10 , the bottom of the electrostatic dust removal box 2 is fixedly connected with two second material falling hoppers 23, the bottom of each of the two second material falling hoppers 23 is provided with a second collecting box 231; the top end inner wall of each of the material falling hoppers is fixedly connected with a gas conveying pipe 27, the bottom of each of the gas conveying pipes 27 is provided with a plurality of nozzles 271, and each of the gas conveying pipes 27 is fixedly connected with a branch pipe 272 in communication; the two branch pipes 272 are fixedly connected with a main pipe 273 in communication through a connecting head; the exhaust port 22 is fixedly connected with an exhaust pipe 221 in communication, and the exhaust pipe 221 is provided with a fan 222.

[0043] The main pipe 273 and the branch pipe 272 provided by the application are used for the following purposes in use: after a period of dust removal, dust particles are attached to the inner wall of the second material falling hopper 23, the dust particles are light in mass and are not easy to directly slide into the second collecting box 231, nitrogen is input into the main pipe 273, the nitrogen enters the gas conveying pipe 27 through the two branch pipes 272 respectively, and the nitrogen in the gas conveying pipe 27 is finally sprayed onto the inner wall of the second material falling hopper 23 through the nozzles 271, so that the dust particles on the inner wall of the second material falling hopper 23 are blown into the second collecting box 231, and the cleaning function of the second material falling hopper 23 is realized.

[0044] As shown in Figure 2 , the electrostatic dust removal box 2 is fixedly connected with two flow uniformizing plates 211 on the inner wall of one end close to the air inlet 21; the cathode plate 24 is arranged at one end close to the flow uniformizing plate 211; the filter plates 241 are provided in plurality, and the filter hole diameters gradually decrease from the cathode plate 24 to the anode plate 242; the anode plates 242 are provided in plurality, and the area of the anode plate 242 close to the exhaust port 22 is greater than the area of the exhaust port 22.

[0045] The flow uniformizing plate 211 provided by the application is used for uniformly dispersing high-speed airflow, reducing turbulence, ensuring that dust uniformly enters an electric field area, improving charging efficiency, and ensuring that dust is fully charged in cooperation with the cathode plate; the filter hole diameters of the plurality of filter plates 241 gradually decrease, so that coarse particles, fine particles and submicron particles are gradually captured, and the function of graded filtration is realized; and air pollution is prevented.

[0046] As shown in Figure 2 , Figure 3 and Figure 5As shown, the cloth bag dust removal box 1 is communicated and fixed with the air inlet pipe 11 at the bottom of one end of the communication pipe 17, the air inlet pipe 11 is communicated and fixed with the protective cover 111 at one end in the cloth bag dust removal box 1, the protective cover 111 is provided with the rotating rod 15, one end of the rotating rod 15 is provided with the driving mechanism, two cyclone fans 113 are arranged on the rotating rod 15, the filter screen is installed at one end of the protective cover 111 away from the air inlet pipe 11, two scrapers 114 are fixed on the rotating rod 15 and contact with the surface of the filter screen, two scrapers 115 are fixed on the rotating rod 15 and contact with the inner wall of the protective cover 111, and the discharge pipe 112 is communicated and fixed at the bottom of the protective cover 111.

[0047] In the process of discharging the flue gas of the thermal power plant, part of the fuel is discharged together with the flue gas without being completely combusted, and the part of the fuel may have sparks to damage the cloth bag body 131, the cyclone fan 113 provided by the application separates the particulate matters by centrifugal force in use, the dust-containing flue gas enters the protective cover 111 in the tangential direction, the rotation generates the centrifugal force, the coarse particles are thrown to the wall surface and fall into the bottom of the protective cover 111, the purified gas is discharged from the center, and the extinguished sparks and the coarse particulate impurities are discharged from the discharge pipe 112; the scraper 114 is used for scraping the dust on the surface of the filter screen to prevent the filter screen from being blocked, and the scraper 115 is used for scraping the particulate impurities on the inner wall of the protective cover 111 to facilitate the rapid sliding of the particulate impurities, so that the removal of the sparks and the coarse particulate impurities is realized.

[0048] As shown in the figure, Figures 1 to 4 As shown, the top end inner wall of the cloth bag dust removal box 1 is fixed with the top plate 13, a plurality of skeletons are linearly arranged and installed at the bottom of the top plate 13, and the cloth bag body 131 is sleeved in each skeleton; the top of the cloth bag dust removal box 1 is fixed with the bottom plate 125, the reciprocating wire rod 123 is rotatably connected between the bottom plate 125 and the top plate 13 through the bearing, the mounting plate 121 is threadedly connected to the reciprocating wire rod 123, a plurality of cleaning brushes 122 are installed on the mounting plate 121, and the cleaning brushes 122 respectively adhere to the outer sides of the cloth bag body 131; the top of the reciprocating wire rod 123 extends to the outside of the cloth bag dust removal box 1 and is provided with the first motor 12; the two guide rods 124 are fixed between the top plate 13 and the bottom plate 125, and the mounting plate 121 is slidingly connected to the two guide rods 124.

[0049] The cleaning brush 122 is used for cleaning the cloth bag body 131 in use, dust on the surface of the cloth bag body 131 can be cleaned by the cleaning brush 122 after the cloth bag body 131 is used for a period of time, the dust removal effect of the cloth bag body 131 is improved, and the dust removal life of the cloth bag body 131 is prolonged.

[0050] As shown in Figure 4 and Figure 5 The driving mechanism comprises a protection box 126 fixed at the bottom of the bottom plate 125, and the rotating rod 15 is rotatably connected to the protection box 126 through a bearing; the outer wall of the rotating rod 15 is fixedly connected with a worm wheel 151; the bottom of the reciprocating screw rod 123 is fixedly connected with a worm gear 127, both ends of the worm gear 127 are rotatably connected to the protection box 126 through bearings, and the worm wheel 151 is engaged with the worm gear 127.

[0051] The driving mechanism provided by the application can drive the worm gear 127 to rotate through the reciprocating screw rod 123, drive the worm wheel 151 to rotate through the worm gear 127, drive the rotating rod 15 to rotate through the worm wheel 151, and drive the cyclone fan 113, the scraper 114 and the scraping rod 115 to rotate through the rotating rod 15, so that the cloth bag body 131 can be cleaned and sparks can be removed at the same time.

[0052] As shown in Figures 1 to 2 The bottom of the cloth bag dust removal box 1 is fixedly connected with two first material hoppers 14, and the bottom of each of the two first material hoppers 14 is provided with a first collection box 141.

[0053] The first material hopper 14 is used for collecting sparks and particulate impurities in use, so that the dust in the cloth bag dust removal box 1 can be uniformly recycled and treated.

[0054] As shown in Figure 3 and Figure 5 The two ends of the rotating rod 15 are symmetrically fixedly connected with two cam blocks 152; the two sides of each cam block 152 are provided with a sliding plate 16, the top end of each sliding plate 16 is slidably connected with two slide rods 161, one end of each slide rod 161 is fixedly connected to the inner wall of the cloth bag dust removal box 1; the outer side of each slide rod 161 is sleeved with a spring 162, and both ends of the spring 162 are fixedly connected to the sliding plate 16 and the cloth bag dust removal box 1 respectively; the bottom of each sliding plate 16 is fixedly connected with two impact rods 163.

[0055] The impact rod 163 is used for hitting the inner wall of the first hopper 14 in use, the rotating rod 15 drives the cam block 152 to rotate, the cam block 152 presses the sliding plate 16 on one side in the rotating process, the sliding plate 16 drives the impact rod 163 to hit the inner wall of the first hopper 14, when the cam block 152 rotates away from the sliding plate 16, the sliding plate 16 drives the impact rod 163 to continue to vibrate and hit under the action of the spring 162, at the same time, the cam block 152 rotates to the other sliding plate 16, drives the sliding plate 16 and the impact rod 163 to hit the other side of the first hopper 14, and the process is repeated to accelerate the dust in the inner wall of the first hopper 14.

[0056] Working principle: The dust collector is a purification and dust removal equipment for treating air pollution, dust particles are captured by the anode plate 242, after a period of time, the anode plate 242 is deposited with more dust particles, if not cleaned in time, excessive accumulation of dust may cause the dust removal efficiency to decrease, if the dust is cleaned too frequently, the capture effect may be affected, the dust cleaning mechanism provided by the application is used when dust-containing flue gas enters from the inlet of the bag dust removal box 1, after bag dust removal, the sulfur-containing flue gas is filtered by the filter bag, and then enters the electrostatic dust removal box 2 through the communication pipe 17, the dust-containing flue gas after airflow distribution enters the cathode plate 24, the air in the cathode plate 24 is ionized by being broken down, and electrons are released, the electrons adhere to the dust particles to make the dust particles negatively charged, the negatively charged dust particles pass through the plurality of filter plates 241 at low speed, most of the dust particles are captured and deposited by the filter plates 241, and a small amount of dust particles that are not captured, whether charged or not, pass through the filter plates 241 and move along the electric field lines to the plurality of anode plates 242, and are captured and deposited by the anode plates 242; the dust is secondarily removed by electrostatic force, and finally discharged from the outlet, thereby preventing and treating air pollution; when dust cleaning is needed, the second motor 25 is started, the output shaft of the second motor 25 drives the disc 252 to rotate, the disc 252 drives the limiting column 253 to rotate, the limiting column 253 drives the limiting block 254 to move in the rotating process, the limiting block 254 moves horizontally and reciprocally under the constraint of the horizontal rod 256, the moving plate 257 is driven to reciprocate by the limiting block 254, and the impact column is driven to reciprocate by the moving plate 257, and the filter plates 241 and the anode plates 242 are regularly hit, thereby achieving the dust cleaning function of the filter plates 241 and the anode plates 242.

[0057] After the second motor 25 is started, the output shaft of the second motor 25 drives the first rotating wheel 259 to rotate, the first rotating wheel 259 drives the belt 263 to rotate, the belt 263 drives the second rotating wheel 262 to rotate, and the second rotating wheel 262 drives the forward and reverse toothed rod 26 to rotate, thereby realizing the function of driving the forward and reverse toothed rod 26 to rotate; the forward and reverse toothed rod 26 drives the cleaning plate 261 to reciprocate up and down, and the cleaning plate 261 scrapes off 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.

[0058] After a period of dust removal, dust particles are attached to the inner wall of the second hopper 23, and the dust particles are light in mass and not easy to directly slide into the second collection box 231. Nitrogen is input into the main pipe 273, the nitrogen enters the gas conveying pipe 27 through the two branch pipes 272, and the nitrogen in the gas conveying pipe 27 is finally sprayed onto the inner wall of the second hopper 23 through the nozzle 271, so as to blow the dust particles on the inner wall of the second hopper 23 into the second collection box 231, thereby realizing the cleaning function of the second hopper 23.

[0059] After a period of dust removal of the cloth bag body 131, the surface of the cloth bag body 131 may adsorb a large amount of dust. 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 reciprocate up and down, the mounting plate 121 drives the cleaning brush 122 to reciprocate up and down, and the cleaning brush 122 cleans the dust on the surface of the cloth bag body 131, thereby improving the dust removal effect of the cloth bag body 131 and prolonging the dust removal life of the cloth bag body 131. When the reciprocating screw rod 123 rotates, the worm 127 rotates, the worm wheel 151 rotates, the rotating rod 15 rotates, the cyclone fan 113, the scraper 114 and the scraping rod 115 rotate, the particles are separated by centrifugal force, the dust-containing flue gas enters the protective cover 111 in the tangential direction, the rotation generates centrifugal force, the coarse particles are thrown to the wall and fall into the bottom of the protective cover 111, the purified gas is discharged from the center, and the extinguished sparks and coarse particle impurities are discharged from the discharge pipe 112; during the rotation of the rotating rod 15, the rotating rod 15 drives the cam block 152 to rotate, the cam block 152 presses the sliding plate 16 on one side during the rotation, the sliding plate 16 drives the impact rod 163 to impact the inner wall of the first hopper 14, when the cam block 152 rotates away from the sliding plate 16 on this side, the sliding plate 16 drives the impact rod 163 to continue to vibrate and impact under the action of the spring 162, at the same time, the cam block 152 rotates to the other side of the sliding plate 16, drives the sliding plate 16 and the impact rod 163 to impact the other side of the first hopper 14, and thus reciprocates to accelerate the dust falling of the inner wall of the first hopper 14.

[0060] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A flue gas dust collector for a thermal power plant, comprising a bag filter box (1) and an electrostatic precipitator box (2), wherein the electrostatic precipitator box (2) is provided with an air inlet (21) and an exhaust port (22) at both ends; the air inlet (21) is connected to the top of the bag filter box (1) through a connecting pipe (17); a cathode plate (24), a filter plate (241) and an anode plate (242) are sequentially fixed to the inner wall of the electrostatic precipitator box (2); and a dust removal mechanism is provided inside the electrostatic precipitator box (2). Its features are: The dust removal mechanism includes a second motor (25) fixed to the top of the electrostatic precipitator (2). The output shaft of the second motor (25) is rotatably connected to the electrostatic precipitator (2) via a bearing and is fixed to a disc (252). A limit post (253) is fixed to the bottom of the disc (252). Four fixing blocks (255) are fixed to the top inner wall of the electrostatic precipitator (2). A crossbar (256) is fixed to each of the two adjacent fixing blocks (255). A limit block (254) is slidably connected to the two crossbars (256). The limit post (253) slides on the limit block (254). A moving plate (257) is fixed to the bottom of the limit block (254). Multiple impact plates (258) are fixed to the bottom of the moving plate (257). Multiple impact posts are fixed to the side wall of the impact plate (258). The bottom of the bag filter box (1) away from the connecting pipe (17) is connected to an air inlet pipe (11). The end of the air inlet pipe (11) inside the bag filter box (1) is connected to a protective cover (111). The protective cover (111) is equipped with a rotating rod (15). One end of the rotating rod (15) is equipped with a driving mechanism. Two cyclone fans (113) are provided on the rotating rod (15). A filter screen is installed at the end of the protective cover (111) away from the air inlet pipe (11). Two scrapers (114) are fixed on the rotating rod (15) and the scrapers (114) are in contact with the surface of the filter screen. Two scraper rods (115) are fixed on the rotating rod (15) and the scraper rods (115) are in contact with the inner wall of the protective cover (111). The bottom of the protective cover (111) is connected to a feed pipe (112). A top plate (13) is fixedly connected to the inner wall of the top of the bag dust collector (1). Multiple frames are linearly arranged at the bottom of the top plate (13), and bag bodies (131) are fitted inside each frame. A bottom plate (125) is fixedly connected to the top of the bag dust collector (1). A reciprocating screw (123) is rotatably connected between the bottom plate (125) and the top plate (13) through a bearing. An mounting plate (121) is threaded onto the reciprocating screw (123). Multiple cleaning brushes (122) are installed on the mounting plate (121). The cleaning brushes (122) are respectively attached to the outer side of the bag body (131). The top of the reciprocating screw (123) extends to the outside of the bag dust collector (1) and is equipped with a first motor (12). Two guide rods (124) are fixedly connected between the top plate (13) and the bottom plate (125). The mounting plate (121) is slidably connected to the two guide rods (124). The drive mechanism includes a protective box (126) fixed to the bottom of the base plate (125), and the rotating rod (15) is rotatably connected to the protective box (126) through bearings; a worm wheel (151) is fixed to the outer wall of the rotating rod (15); a worm (127) is fixed to the bottom of the reciprocating screw (123), and both ends of the worm (127) are rotatably connected to the protective box (126) through bearings; the worm wheel (151) meshes with the worm (127); Two cam blocks (152) are symmetrically fixed at both ends of the rotating rod (15); sliding plates (16) are provided on both sides of the cam blocks (152), and two sliding rods (161) are slidably connected to the top of the sliding plates (16). One end of each sliding rod (161) is fixed to the inner wall of the bag filter box (1); springs (162) are sleeved on the outer side of each sliding rod (161), and the two ends of each spring (162) are fixed to the sliding plate (16) and the bag filter box (1) respectively; two impact rods (163) are fixed to the bottom of each sliding plate (16). When the flue gas containing dust particles enters the bag filter box (1) through the inlet, it undergoes initial dust removal by the filter bags. Then, it enters the electrostatic precipitator box (2) through the connecting pipe (17). After the airflow distribution, the dust-laden flue gas enters the cathode plate (24). The air in the cathode plate (24) is ionized by the breakdown. The negatively charged dust particles pass through multiple filter plates (241) and are captured and deposited by the filter plates (241). The uncaptured charged or uncharged dust particles pass through the filter plates (241) and move along the electric field lines to multiple anode plates (242), where they are captured and deposited. Come on; turn 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 post (253) to rotate. During the rotation, the limit post (253) drives the limit block (254) to move. Under the constraint of the cross bar (256), the limit block (254) moves horizontally back and forth. The limit block (254) drives the moving plate (257) to move back and forth. The moving plate (257) drives the impact column to move back and forth, and regularly impacts multiple filter plates (241) and anode plates (242) to realize the function of tapping and cleaning the filter plates (241) and anode plates (242). By turning on the first motor (12), the output shaft of the first motor (12) drives the reciprocating screw (123) to rotate, which in turn drives the mounting plate (121) to move up and down, which in turn drives the cleaning brush (122) to move up and down, thus cleaning the dust on the surface of the bag body (131). When the reciprocating screw (123) rotates, it drives the worm (127) to rotate, which in turn drives the worm wheel (151) to rotate, which in turn drives the rotating rod (15) to rotate, which in turn drives the cyclone fan (113), scraper (114) and scraper (115) to rotate. Through centrifugal force, particulate matter is separated, and the dust-laden flue gas enters the protective cover (111) tangentially. The rotation generates centrifugal force, and coarse particles are thrown against the wall and fall into the protective cover. 111) At the bottom, the purified gas is discharged from the center, and the extinguished sparks and their coarse particles 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 the sliding plate (16) on one side. The sliding plate (16) drives the impact rod (163) to impact the inner wall of the first hopper (14). When the cam block (152) rotates away from the sliding plate (16) on that side, under the action of the spring (162), the sliding plate (16) drives the impact rod (163) to continue to vibrate and impact. At the same time, the cam block (152) rotates to the other sliding plate (16), driving the sliding plate (16) and the impact rod (163) to impact the other side of the first hopper (14). This process is repeated to accelerate the dust falling off the inner wall of the first hopper (14).

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

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

4. A flue gas dust collector for thermal power plants according to claim 3, characterized in that: The bottom of the electrostatic dust collector (2) is fixedly connected to two second hoppers (23), and the bottom of the two second hoppers (23) is provided with a second collection box (231); the top inner wall of each hopper is fixedly connected to an air supply pipe (27), the bottom of each air supply pipe (27) is equipped with multiple nozzles (271), and each air supply pipe (27) is connected to a branch pipe (272); the two branch pipes (272) are connected to a main pipe (273) through a connector; the exhaust port (22) is connected to an exhaust pipe (221), and a fan (222) is installed on the exhaust pipe (221).

5. A flue gas dust collector for thermal power plants according to claim 4, characterized in that: Two flow equalization plates (211) are fixed to the inner wall of the electrostatic dust collector (2) near the air inlet (21); the cathode plate (24) is located at the end near the flow equalization plate (211); multiple filter plates (241) are provided, and the diameter of the filter holes gradually decreases from the cathode plate (24) to the anode plate (242); multiple anode plates (242) are provided, and the area of ​​the anode plate (242) near the exhaust port (22) is larger than the area of ​​the exhaust port (22).

6. A flue gas dust collector for thermal power plants according to claim 1, characterized in that: The bottom of the bag dust collector (1) is fixed with two first hoppers (14), and the bottom of the two first hoppers (14) is provided with a first collection box (141).

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